• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a method for establishing a functional diagnosis of a converter (1) of DC voltage-continuous static voltage in a vehicle of the electric or hybrid type comprising a power supply circuit, the latter comprising at least a first (2) an electrical voltage source supplying a primary circuit (3) with direct current, and a second (4) electrical voltage source supplying a secondary circuit (5) with direct current, the first source having a voltage value greater than the second, said primary and secondary circuits being connected to each other via the voltage converter itself controlled by control and safety means, the method comprising the following steps: • Step (10): deactivating any energy consumer on said primary circuit or waiting for any consumer of energy on the primary circuit to be inactive, • Step (20): then sending to said converter an output voltage greater than the voltage of the second voltage source, • Step (30): then determining whether a transfer of energy occurs from said primary circuit (3) to said secondary circuit, and: - Step (50): if not, establish a faulty functionality diagnosis of said converter.
    公开号:FR3030766A1
    申请号:FR1463049
    申请日:2014-12-22
    公开日:2016-06-24
    发明作者:Jerome Lachaize；Damien Verdier
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a method for establishing a functional diagnosis of a voltage-DC static voltage converter in a vehicle of electric or hybrid type comprising a power supply circuit, the latter comprising at least a first voltage source an electric power supply supplying a DC primary circuit, and a second voltage source supplying a DC secondary circuit, the first source having a voltage value greater than the second, said primary and secondary circuits being connected to each other; other via said voltage converter DC-DC static switch itself controlled by means of control and safety. The 10 hybrid vehicles concerned may be micro-hybrid type, light hybrid, or full hybrid. The 12-volt on-board network that powers the computers in a vehicle is a critical element that guarantees the safety of the vehicle. The present invention provides a method for identifying the loss of a safety barrier on the on-board network. More specifically, the invention consists of a method as defined in the application context above, which is characterized in that it comprises the following steps: - Deactivate any consumer of energy on said primary circuit or wait until 20 any consumer of energy on the primary circuit is inactive, - Then command said converter output voltage greater than the voltage of the second voltage source, - then determine whether a transfer of energy occurs from said primary circuit to said secondary circuit, and if not, establish a diagnosis of faulty functionality of said converter. The method according to the invention consists in testing the link converter between the primary circuit and the secondary circuit supplying the on-board network, in order to verify the presence of the safety barrier that it constitutes for this secondary network. According to an advantageous characteristic, the step of determining whether a transfer of energy occurs from said primary circuit to said secondary circuit, consists in determining whether the discharge current of the first voltage source increases and the voltage of the second voltage source increases. voltage source increases. By discharge current of the first voltage source is meant for the present memory a current which causes a decrease in the energy state of the first voltage source.
    [0002] According to an advantageous characteristic, the step of determining whether a transfer of energy occurs from said primary circuit to said secondary circuit, consists in determining whether the discharge current of the first voltage source increases and whether the discharge current of the second source of voltage decreases. By discharge current of the second voltage source is meant for the present memory a current which causes a decrease in the energy state of the second voltage source. According to an advantageous characteristic, the method according to the invention further comprises a step of establishing a diagnosis of correct functionality of said converter in the case of a transfer of energy found from the primary circuit to the secondary circuit. According to an advantageous characteristic, which is an alternative to the previous one, the method according to the invention further comprises the following steps, in the case of a transfer of energy observed from the primary circuit to the secondary circuit, and in the case of a converter non-reversible static DC-DC voltage in current: - Then command said converter output voltage lower than the voltage of the second voltage source, - then determine if the second voltage source discharges into the circuit secondary, and: 20 - If yes establish a diagnosis of correct functionality of said converter, - If not establish a diagnosis of malfunction of said converter. According to an advantageous characteristic, the step of determining whether the second voltage source discharges into the secondary circuit, consists in determining whether the discharge current of the first voltage source decreases and the voltage of the second source of voltage decreases. voltage decreases. According to an advantageous characteristic, the step of determining whether the second voltage source discharges into the secondary circuit consists of determining whether the discharge current of the first voltage source decreases and the discharge current of the second voltage source decreases. voltage source increases. Other features and advantages will appear on reading the following examples of embodiments of the invention, accompanied by the accompanying drawings, examples given by way of nonlimiting illustration: FIG. 1 represents an example of a schematic electrical circuit permitting to implement a method according to the invention to establish a functional diagnosis of a DC voltage-DC voltage converter, Figure 2 represents a flow chart of a first and a second general examples of a method according to the invention. invention for establishing a functional diagnosis of a DC voltage-DC voltage converter, Figure 3 represents a flow diagram of a first particular example of implementation of the first and second general examples according to Figure 1, Figure 4 represents a logic diagram of a second particular example of implementation of the first and second general examples according to FIG. FIG. 5 represents a diagram showing the evolution of the voltage and discharge current of the first and second voltage sources, during the process examples described in FIGS. 2 to 4. The electrical circuit shown schematically in Figure 1 is a power supply circuit of a secondary network which team known manner a vehicle of electric or hybrid type.
    [0003] This power supply circuit comprises a first voltage source 2 supplying a primary circuit DC, and a second voltage source supplying a secondary DC circuit, a DC voltage converter DC / DC) static stripper which connects the primary circuits 3 and secondary 5 to each other, as shown.
    [0004] The first voltage source 2 has a voltage value greater than the second voltage source. By way of example, the first voltage source 2 may be a battery with a voltage greater than 12 volts, for example a 48 volts battery in the case of a light hybrid vehicle, and the second voltage source 4 may be a battery. nominal voltage substantially equal to 12 volts, for example a lead battery. The primary circuit is for example a power supply circuit of an electric power train in an integral hybrid vehicle, and the secondary circuit comprises the vehicle 12-volt edge network. The circuit shown in FIG. 1 advantageously comprises a current sensor 25 for measuring the discharge current of the second voltage source 4, and a current sensor 8 for measuring the discharge current of the first source of electricity. electric tension. By discharge current is meant in the examples described a current which causes a decrease in the energy state of the corresponding battery. The static DC-DC voltage converter 1 is controlled by control and safety means 6 actuated by an engine control unit (not shown), preferably during the stopping phases of the vehicle for the application of a method according to the invention, especially as described with the help of Figures 2 to 4. In Figures 2 to 4, has been designated in the flowcharts, the converter 1 by the abbreviation DODO 1, the first 2 source by the abbreviation Hv-Batt 2, the second 4 voltage source by the abbreviation Lv-Batt 4, the primary circuit 3 by the abbreviation OP 3, the secondary circuit 5 by the abbreviation CS 5. The FIG. 2 illustrates on the same logic diagram the first and second general examples of implementation of a method according to the invention for establishing a functional diagnosis of the converter 1 of continuous DC-DC voltage, on a circuit 15 as represented for example on the FIG. 1. The method according to FIG. 2 and according to the first general example comprises the following steps: Step 10: deactivate any energy consumer on the primary circuit 3, or wait for any consumer of energy on the primary circuit 3 is inactive, 20 to ensure that no energy is taken from the first voltage source 2 while the diagnostic process is executed, - Step 20: then to the converter 1 control an output voltage greater than the voltage of the second 4 voltage source, via the control and safety means 6 of the converter 1, 25 - Step 30: Then determine whether a transfer of energy occurs from the primary circuit 3 to the secondary circuit 5, and - Step 40: if so, in accordance with the dashed line in Figure 2, establish a diagnosis of correct functionality of the converter 1, 30 - Step 50: if not, establish a diagnosis of function Failure of the converter 1. Alternatively, the method shown in FIG. 2 according to the second general example does not establish a diagnosis of correct functionality of the converter 1 directly after step 30. The dashed line is excluded from this second example. Thus, according to this second general example, the method further comprises the following steps, starting from step 30, in the case of a transfer of energy found from the primary circuit 3 to the secondary circuit 5, and in the case of a non-reversible static DC-DC converter 1: - Step 31: then control the voltage converter 1 with an output voltage lower than the voltage of the second voltage source 4, - Step 32: determine then if the second voltage source 4 discharges into the secondary circuit 5, and: - Step 40: in the affirmative establish a diagnosis of correct functionality of the voltage converter 1, - Step 50: if not, establish a diagnosis of faulty functionality of voltage converter 1. The flow diagram of FIG. 3 takes the flow diagram of FIG. 2 and details the contents of steps 30 and 32, according to a first particular example of implementation of the two general examples of processes as defined by the logic diagram of FIG. In the example of FIG. 3, the electric supply circuit as described for example in FIG. 1 further comprises an electric tensiometer (not shown). Preferably, according to FIG. 3, the step of determining whether a transfer of energy occurs from the primary circuit 3 to the secondary circuit 5, consists in determining whether the discharge current of the first voltage source 2 increases and if the voltage of the second voltage source 4 increases. Preferably, according to FIG. 3, the step 32 of determining whether the second voltage source 4 discharges into the secondary circuit 5, consists in determining whether the discharge current of the first voltage source 2 decreases and whether the voltage of the second voltage source 4 decreases. The flowchart of FIG. 4 takes again the logic diagram of FIG. 2 and details the content of steps 30 and 32, according to a second particular example of implementation of the two examples of general methods as defined by the logic diagram of FIG. 2. Preferably, according to FIG. 4, the step of determining whether a transfer of energy occurs from the primary circuit 3 to the secondary circuit 5, consists in determining whether the discharge current of the first voltage source 2 increases. and if the discharge current of the second voltage source 4 decreases. Preferably, according to FIG. 4, the step 32 of determining whether the second voltage source 4 discharges into the secondary circuit 5 consists in determining whether the discharge current of the first voltage source 35 decreases and whether the discharge current of the second voltage source 4 increases. FIG. 5 represents an evolution diagram of the supervised quantities, voltages and currents of the first 2 and second 4 voltage sources, in the context of the processes described above with the help of FIGS. 2 to 4. has represented in abscissa the time in seconds, on the ordinate axis on the right the current in amperes, and on the ordinate axis on the left the voltage in volts. In FIG. 5, the curve 60 represents the voltage control of the voltage converter 1. Curve 61 represents the current response of the second voltage source. Curve 62 represents the voltage response of the second voltage source. Curve 63 represents the current response of the first voltage source. Curve 64 represents the voltage response of the first voltage source.
    [0005] In FIG. 5, the numerical scales of the voltages (on the left) and the currents (on the right) on the ordinate are not indicated. The corresponding ordinate axes respectively make it possible to illustrate the direction of variation of the quantity considered. In FIG. 5, in the chronological order, in the case of the first general example, according to the control curve 60 of the converter 1, at the instant t = 5 s in the example, the converter 1 voltage an output voltage greater than the voltage of the second voltage source represented by the curve 62, this almost instantly in view of the time scale, as shown by the curve 60 with the square signal shown. For example, the voltage increase may represent a little more than one volt, preferably between one and two volts as shown, so that the converter 1 delivers a voltage of the order of 15 volts for a second voltage source in the form of a lead battery whose voltage is between 10.5 and 14 volts approximately. Then (step 30 - FIG. 3) is seen on the curve 63 an almost immediate increase of the discharge current of the first voltage source and on the curve 62 an equally quasi-immediate voltage increase of the second voltage source, always in view of the time scale. These two combined indicators make it possible to diagnose directly, in the case of a first particular example of the first general example, a correct functionality of the voltage converter 1 in step 40. Alternatively, it can be seen (step 30 - FIG. 4) on the curve 63 an almost immediate increase of the discharge current of the first voltage source and on the curve 61 an almost immediate reduction of the discharge current of the second voltage source, in view of the time scale. These two combined indicators make it possible to diagnose alternately directly, in the case of a second particular example of the first general example, a correct functionality of the voltage converter 1 in step 40.
    [0006] In FIG. 5, always in chronological order, in the case of the second general example, and in the case of a non-reversible DC voltage-DC converter 1 in accordance with the control curve 60 of the converter 1, the voltage converter 1 is advantageously controlled subsequently, at a time t = 19 s in the example, by an output voltage lower than the voltage of the second voltage source represented by the curve 62, this almost instantaneously. in view of the time scale, as shown by the curve 60 with the square signal shown. For example, the voltage decrease may represent a little less than 5 volts from the voltage increased in step 20, so that the converter 1 10 delivers a voltage of less than 10.8 volts corresponding substantially to the no-load voltage of the battery, for a second voltage source in the form of a lead battery whose voltage is between 10.5 and 14 volts, for example a voltage of the order of 10.5 volts as shown in FIG. FIG. 5 is then furthermore noted (step 32, FIG. 3) on the curve 63, a quasi-immediate decrease in the discharge current of the first voltage source and on the curve 62 a decrease also at first almost immediately in the voltage of the first voltage source. second source of voltage, in view of the time scale, then a progressive decrease of this voltage then. These two combined indicators make it possible to establish, in the case of a first particular example of the second general example, a diagnosis of correct functionality of the voltage converter 1 in step 40. In the opposite case, a diagnosis of malfunctioning of converter 1 is established in step 50. Alternatively, it is furthermore noted (step 32 - FIG. 4) on curve 63 an almost immediate reduction of the discharge current of the first voltage source and on curve 61 a also almost immediately increases the discharge current 25 of the second voltage source, always in view of the time scale. These two combined indicators alternatively make it possible to establish, in the case of a second particular example of the second general example, a diagnosis of correct functionality of the voltage converter 1 in step 40. Otherwise, a diagnosis of failed functionality of the converter 1 is established in step 50.
    权利要求:
    Claims (7)
    [0001]
    REVENDICATIONS1. Method for establishing a functional diagnosis of a converter (1) of DC voltage-continuous static voltage in a vehicle of electric or hybrid type comprising a power supply circuit, the latter comprising at least a first (2) source of electrical voltage supplying a DC primary circuit (3), and a second (4) DC voltage source supplying a secondary DC circuit (5), the first (2) source having a voltage value greater than the second (4). ), said primary (3) and secondary (5) circuits being connected to each other via said converter (1) of static DC-DC voltage controlled by control means (6) itself and safety, characterized in that the method comprises the following steps: - Step (10): disable any energy consumer on said primary circuit (3) or wait for any consumer of energy on the primary circuit (3) is inactive, - Step (20): subsequently commanding said converter (1) an output voltage greater than the voltage of the second (4) voltage source, - Step (30): determine then if a transfer of energy occurs from said primary circuit (3) to said secondary circuit (5), and: - Step (50): if not, establish a diagnosis of malfunction of said converter (1). 20
    [0002]
    The method of claim 1, wherein the step (30) of determining whether a transfer of energy occurs from said primary circuit (3) to said secondary circuit (5), is to determine whether the discharge current of the first (2) voltage source increases and the voltage of the second (4) voltage source increases.
    [0003]
    The method of claim 1, wherein the step (30) of determining whether a transfer of energy occurs from said primary circuit (3) to said secondary circuit (5), is to determine whether the discharge current the first (2) voltage source increases and the discharge current of the second (4) voltage source decreases.
    [0004]
    4. A method according to any one of claims 1 to 3, further comprising a step (40) of establishing a diagnosis of correct functionality of said converter (1), in the case of a recorded energy transfer of the circuit primary 3 to the secondary circuit5.
    [0005]
    5. Method according to any one of claims 1 to 3, further comprising the following steps, in the case of a transfer of energy from the primary circuit 3 to the secondary circuit 5 found, and in the case of a converter non-reversible static DC-DC voltage converter: - Step (31): subsequently commanding said converter (1) an output voltage lower than the voltage of the second (4) voltage source, - Step (32) : then determine if the second (4) voltage source discharges into the secondary circuit (5), and: - Step (40): in the affirmative establish a diagnosis of correct functionality of said converter (1), - Step ( 50): if not, establish a faulty functionality diagnosis of said converter (1).
    [0006]
    The method of claim 5, wherein the step (32) of determining whether the second (4) voltage source discharges into the secondary circuit (5), is to determine whether the discharge current of the first (2) voltage source decreases and the voltage of the second (4) voltage source decreases.
    [0007]
    The method of claim 5, wherein the step (32) of determining whether the second (4) voltage source discharges into the secondary circuit (5), is to determine whether the discharge current of the first (2) voltage source 20 decreases and the discharge current of the second (4) voltage source increases.
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    同族专利:
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    引用文献:
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    法律状态:
    2015-12-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-06-24| PLSC| Publication of the preliminary search report|Effective date: 20160624 |
    2016-12-22| PLFP| Fee payment|Year of fee payment: 3 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 4 |
    2019-12-19| PLFP| Fee payment|Year of fee payment: 6 |
    2020-12-23| PLFP| Fee payment|Year of fee payment: 7 |
    2021-04-16| TP| Transmission of property|Owner name: VITESCO TECHNOLOGIES, DE Effective date: 20210309 |
    2021-12-24| PLFP| Fee payment|Year of fee payment: 8 |
    2022-02-11| CA| Change of address|Effective date: 20220103 |
    优先权:
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    FR1463049A|FR3030766B1|2014-12-22|2014-12-22|METHOD FOR ESTABLISHING A FUNCTIONAL DIAGNOSIS OF A STATIC DEVICE CONTINUOUS-CONTINUOUS VOLTAGE CONVERTER|FR1463049A| FR3030766B1|2014-12-22|2014-12-22|METHOD FOR ESTABLISHING A FUNCTIONAL DIAGNOSIS OF A STATIC DEVICE CONTINUOUS-CONTINUOUS VOLTAGE CONVERTER|
    KR1020150181300A| KR20160076458A|2014-12-22|2015-12-17|Method for establishing a functional diagnosis for a buck static dc-dc voltage converter|
    US14/974,336| US9759784B2|2014-12-22|2015-12-18|Method for establishing a functional diagnosis for a buck static DC-DC voltage converter|
    CN201510960071.0A| CN105717462B|2014-12-22|2015-12-21|For establishing the method for being directed to the functional diagnosis of decompression static state DC-DC electric pressure converter|
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