A battery cell charging and discharging circuit detection system and method

Abstract

The present invention provides a battery cell charge and discharge circuit detection system and method in the field of battery cell charge and discharge test technology. The system includes at least one ACIR test device, at least one switch module A, at least one switch module B, at least one switch module C and at least one charge and discharge device; the switch module A includes a relay S1, a relay S2, a relay S3 and a relay S4; the switch module B includes a relay S5, a relay S6, a relay S7 and a relay S8; the switch module C includes a relay S9, a relay S10, a relay S11 and a relay S12; the ACIR test device is connected to the charge and discharge device. The present invention has the advantages of greatly improving the efficiency of battery cell charge and discharge circuit detection.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell charge and discharge testing, and in particular to a battery cell charge and discharge circuit detection system and method. Background Art

[0002] After the battery cell is generated, it needs to be tested for charge and discharge. In order to improve the efficiency of the battery cell charge and discharge test, the charging and discharging equipment tests multiple battery cells in parallel at the same time. At this time, it is easy for the test probes to be connected incorrectly, which in turn affects the charge and discharge test of the battery cell. Therefore, there is a need to detect whether the wiring of the charge and discharge circuits is correct.

[0003] Manual inspection has traditionally been used to detect battery cell charging and discharging circuits. However, due to the large number of battery cells, manual inspection is very cumbersome, inefficient, and difficult to detect.

[0004] Therefore, how to provide a battery cell charge and discharge circuit detection system and method to improve the efficiency of battery cell charge and discharge circuit detection has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a battery cell charge and discharge circuit detection system and method to improve the efficiency of battery cell charge and discharge circuit detection.

[0006] In a first aspect, the present invention provides a battery cell charge and discharge circuit detection system, comprising at least one ACIR test device, at least one switch module A, at least one switch module B, at least one switch module C and at least one charge and discharge device;

[0007] The switch module A includes a relay S1, a relay S2, a relay S3 and a relay S4; the switch module B includes a relay S5, a relay S6, a relay S7 and a relay S8; the switch module C includes a relay S9, a relay S10, a relay S11 and a relay S12;

[0008] One end of the relay S1 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S2 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S3 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1s+ pin of the charge-discharge device; one end of the relay S4 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1s+ pin of the charge-discharge device;

[0009] One end of the relay S5 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S6 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1s+ pin of the charge-discharge device; one end of the relay S7 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S8 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1s- pin of the charge-discharge device;

[0010] One end of the relay S9 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S10 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S11 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1s- pin of the charge-discharge device; one end of the relay S12 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1s- pin of the charge-discharge device;

[0011] The ACIR testing device is connected to the charging and discharging equipment.

[0012] Further, the relay S1 , relay S2 , relay S3 , relay S4 , relay S5 , relay S6 , relay S7 , relay S8 , relay S9 , relay S10 , relay S11 and relay S12 are all connected to an ACIR test device.

[0013] In a second aspect, the present invention provides a method for detecting a cell charge and discharge circuit, comprising the following steps:

[0014] Step S10, connecting the B1+ pin and B1s+ pin of the charging and discharging device to the positive electrode ear of the battery cell, and connecting the B1- pin and B1s- pin to the negative electrode ear of the battery cell;

[0015] Step S20: After receiving the cell charge and discharge instruction, the charging and discharging device performs internal resistance detection, positive end circuit detection and negative end circuit detection on the cell through the ACIR test device, switch module A, switch module B and switch module C;

[0016] Step S30: After the detection is passed, the charging and discharging equipment charges and discharges the battery cell.

[0017] Furthermore, in step S20, the internal resistance detection of the battery cell specifically includes:

[0018] Step S211, the charging and discharging device starts the ACIR test device, and the ACIR test device turns on the relay S5, the relay S6, the relay S7 and the relay S8 of the switch module B;

[0019] Step S212, the ACIR test device outputs the AC source current Iac through the switch module B to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S213; if not, it indicates that there is a problem with the cell contact and the test is exited;

[0020] Step S213, the ACIR test device collects the AC internal resistance r of the battery cell, verifies whether the resistance value of the AC internal resistance r is within a preset resistance range, and if so, generates a test result indicating that the internal resistance test is qualified; if not, generates a test result indicating that the internal resistance test is unqualified, and prompts the number of battery cells that fail the internal resistance test.

[0021] Furthermore, in step S20, the positive end circuit detection of the battery cell specifically includes:

[0022] Step S221, the charging and discharging device starts the ACIR test device, and the ACIR test device turns on the relay S1, relay S2, relay S3 and relay S4 of the switch module A;

[0023] Step S222, the ACIR test device outputs the AC source current Iac through the switch module A to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S223; if not, it indicates that there is a problem with the cell contact and the test is exited;

[0024] Step S223, the ACIR testing device collects the first AC voltage when the AC source current Iac flows through B1+ and B1s+, and calculates the resistance value r1 based on the AC source current Iac and the first AC voltage;

[0025] Step S224, the ACIR test device determines whether the resistance r1 is close to zero. If so, a test result indicating that the positive circuit is qualified is generated; if not, a test result indicating that the positive circuit is unqualified is generated, and the number of cells that fail the positive circuit test is indicated.

[0026] Furthermore, in the step S20, the negative terminal circuit detection of the battery cell specifically includes:

[0027] Step S231, the charging and discharging device starts the ACIR test device, and the ACIR test device connects the relay S9, the relay S10, the relay S11 and the relay S12 of the switch module C;

[0028] Step S232, the ACIR test device outputs the AC source current Iac through the switch module C to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S233; if not, it indicates that there is a problem with the cell contact and the test is exited;

[0029] Step S233, the ACIR testing device collects the second AC voltage generated when the AC source current Iac flows through B1- and B1s-, and calculates the resistance value r2 based on the AC source current Iac and the second AC voltage;

[0030] Step S234, the ACIR test device determines whether the resistance value r2 is close to zero. If so, a test result indicating that the negative circuit is qualified is generated; if not, a test result indicating that the negative circuit is unqualified is generated, and the number of cells that fail the negative circuit test is indicated.

[0031] The advantages of the present invention are:

[0032] At least one ACIR test device, a switch module A, a switch module B, a switch module C and a charging and discharging device are provided, one end of the switch module A, the switch module B and the switch module C are connected to the ACIR test device, and the other end is connected to the charging and discharging device, the ACIR test device is connected to the charging and discharging device, and before the charging and discharging device charges and discharges the battery cell, the on and off of the switch module A, the switch module B and the switch module C can be controlled by the ACIR test device, and the internal resistance detection, the positive end circuit detection and the negative end circuit detection of the battery cell are automatically performed by the ACIR test device, that is, it is automatically determined whether the charging and discharging device contacts the two pole ears of the same battery cell, it is automatically determined whether B1+ and B1s+ are connected to the same pole ear, and it is automatically determined whether B1- and B1s- are connected to the same pole ear. Compared with traditional manual detection, the efficiency of the battery cell charging and discharging circuit detection is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0034] Figure 1 The invention discloses a circuit diagram of a battery cell charging and discharging circuit detection system.

[0035] Figure 2 The present invention is a flow chart of a method for detecting a battery cell charging and discharging circuit.

[0036] Figure 3 The present invention is a schematic flow chart of a method for detecting a battery cell charging and discharging circuit. DETAILED DESCRIPTION

[0037] The technical solution in the embodiment of the present application has the following overall idea: an ACIR test device, a switch module A, a switch module B, a switch module C and a charging and discharging device are set, and the charging and discharging device controls the on and off of the switch module A, the switch module B and the switch module C through the ACIR test device to switch the test path, and automatically performs internal resistance detection, positive end circuit detection and negative end circuit detection on the battery cell through the ACIR test device to improve the efficiency of the battery cell charging and discharging circuit detection.

[0038] Please refer to Figures 1 to 3 As shown, a preferred embodiment of a battery cell charge and discharge circuit detection system of the present invention comprises at least one ACIR test device, at least one switch module A, at least one switch module B, at least one switch module C and at least one charge and discharge device; the ACIR test device is an existing device, such as an ACIR test device disclosed in the Chinese utility model patent with application number CN202121692794.4; the charge and discharge device is used to charge and discharge the battery cell, and its B1+ pin and B1s+ pin are used to connect the positive electrode ear of the battery cell, and the B1- pin and B1s- pin are used to connect the negative electrode ear of the battery cell;

[0039] The switch module A includes a relay S1, a relay S2, a relay S3 and a relay S4; the switch module B includes a relay S5, a relay S6, a relay S7 and a relay S8; the switch module C includes a relay S9, a relay S10, a relay S11 and a relay S12;

[0040] One end of the relay S1 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S2 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S3 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1s+ pin of the charge-discharge device; one end of the relay S4 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1s+ pin of the charge-discharge device;

[0041] One end of the relay S5 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S6 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1s+ pin of the charge-discharge device; one end of the relay S7 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S8 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1s- pin of the charge-discharge device;

[0042] One end of the relay S9 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S10 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S11 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1s- pin of the charge-discharge device; one end of the relay S12 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1s- pin of the charge-discharge device;

[0043] The ACIR test device is connected to the charging and discharging equipment via a bus.

[0044] The relay S1 , relay S2 , relay S3 , relay S4 , relay S5 , relay S6 , relay S7 , relay S8 , relay S9 , relay S10 , relay S11 and relay S12 are all connected to the ACIR test device.

[0045] A preferred embodiment of a method for detecting a cell charge and discharge circuit of the present invention comprises the following steps:

[0046] Step S10, connecting the B1+ pin and B1s+ pin of the charging and discharging device to the positive electrode ear of the battery cell, and connecting the B1- pin and B1s- pin to the negative electrode ear of the battery cell;

[0047] Step S20: After receiving the cell charge and discharge instruction, the charging and discharging device performs internal resistance detection, positive end circuit detection and negative end circuit detection on the cell through the ACIR test device, switch module A, switch module B and switch module C; in specific implementation, the internal resistance detection, positive end circuit detection and negative end circuit detection can be performed in sequence, and the next detection is performed only after the current detection is qualified;

[0048] Step S30: After the detection is passed, the charging and discharging device charges and discharges the battery cell, that is, the main circuit of the charging and discharging device is connected to charge and discharge the battery cell.

[0049] In the step S20, the internal resistance detection of the battery cell specifically includes:

[0050] Step S211, the charging and discharging device starts the ACIR test device, and the ACIR test device turns on the relay S5, the relay S6, the relay S7 and the relay S8 of the switch module B;

[0051] Step S212, the ACIR test device outputs the AC source current Iac through the switch module B to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S213; if not, it indicates that there is a problem with the cell contact and the test is exited; the AC source current Iac is preferably 100mA;

[0052] Step S213, the ACIR test device collects the AC internal resistance r of the battery cell, verifies whether the resistance value of the AC internal resistance r is within a preset resistance range, and if so, generates a test result indicating that the internal resistance test is qualified; if not, generates a test result indicating that the internal resistance test is unqualified, and prompts the number of battery cells that fail the internal resistance test.

[0053] After the internal resistance detection is completed, the relays of the switch module B are disconnected, and the loading of the AC source current of the ACIR test device is turned off.

[0054] In the step S20, the positive end circuit detection of the battery cell specifically includes:

[0055] Step S221, the charging and discharging device starts the ACIR test device, and the ACIR test device turns on the relay S1, relay S2, relay S3 and relay S4 of the switch module A;

[0056] Step S222, the ACIR test device outputs the AC source current Iac through the switch module A to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S223; if not, it indicates that there is a problem with the cell contact and the test is exited;

[0057] Step S223, the ACIR testing device collects the first AC voltage when the AC source current Iac flows through B1+ and B1s+, and calculates the resistance value r1 based on the AC source current Iac and the first AC voltage;

[0058] Step S224, the ACIR test device determines whether the resistance r1 is close to zero. If so, a test result indicating that the positive circuit is qualified is generated; if not, a test result indicating that the positive circuit is unqualified is generated, and the number of cells that fail the positive circuit test is indicated.

[0059] After the positive end line detection is completed, the relays of the switch module A are disconnected, and the loading of the AC source current of the ACIR test device is turned off.

[0060] In the step S20, the negative end circuit detection of the battery cell specifically includes:

[0061] Step S231, the charging and discharging device starts the ACIR test device, and the ACIR test device connects the relay S9, the relay S10, the relay S11 and the relay S12 of the switch module C;

[0062] Step S232, the ACIR test device outputs the AC source current Iac through the switch module C to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S233; if not, it indicates that there is a problem with the cell contact and the test is exited;

[0063] Step S233, the ACIR testing device collects the second AC voltage generated when the AC source current Iac flows through B1- and B1s-, and calculates the resistance value r2 based on the AC source current Iac and the second AC voltage;

[0064] Step S234, the ACIR test device determines whether the resistance value r2 is close to zero. If so, a test result indicating that the negative circuit is qualified is generated; if not, a test result indicating that the negative circuit is unqualified is generated, and the number of cells that fail the negative circuit test is indicated.

[0065] After the negative terminal line detection is completed, the relays of the switch module C are disconnected, and the loading of the AC source current of the ACIR test device is turned off.

[0066] In summary, the advantages of the present invention are:

[0067] At least one ACIR test device, a switch module A, a switch module B, a switch module C and a charging and discharging device are provided, one end of the switch module A, the switch module B and the switch module C are connected to the ACIR test device, and the other end is connected to the charging and discharging device, the ACIR test device is connected to the charging and discharging device, and before the charging and discharging device charges and discharges the battery cell, the on and off of the switch module A, the switch module B and the switch module C can be controlled by the ACIR test device, and the internal resistance detection, the positive end circuit detection and the negative end circuit detection of the battery cell are automatically performed by the ACIR test device, that is, it is automatically determined whether the charging and discharging device contacts the two pole ears of the same battery cell, it is automatically determined whether B1+ and B1s+ are connected to the same pole ear, and it is automatically determined whether B1- and B1s- are connected to the same pole ear. Compared with traditional manual detection, the efficiency of the battery cell charging and discharging circuit detection is greatly improved.

[0068] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A battery cell charging and discharging circuit detection system, Features: It includes at least one ACIR test device, at least one switch module A, at least one switch module B, at least one switch module C and at least one charging and discharging device; The switch module A includes a relay S1, a relay S2, a relay S3 and a relay S4; the switch module B includes a relay S5, a relay S6, a relay S7 and a relay S8; the switch module C includes a relay S9, a relay S10, a relay S11 and a relay S12; One end of the relay S1 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S2 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S3 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1 s+ pin of the charge-discharge device; one end of the relay S4 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1 s+ pin of the charge-discharge device; One end of the relay S5 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1+ pin of the charge-discharge device; one end of the relay S6 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1 s+ pin of the charge-discharge device; one end of the relay S7 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S8 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1 s- pin of the charge-discharge device; One end of the relay S9 is connected to the I-AC+ pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S10 is connected to the VS-AC+ pin of the ACIR test device, and the other end is connected to the B1- pin of the charge-discharge device; one end of the relay S11 is connected to the I-AC- pin of the ACIR test device, and the other end is connected to the B1 s- pin of the charge-discharge device; one end of the relay S12 is connected to the VS-AC- pin of the ACIR test device, and the other end is connected to the B1 s- pin of the charge-discharge device; The ACIR testing device is connected to the charging and discharging equipment.

2. A battery cell charging and discharging circuit detection system as claimed in claim 1, Features: The relay S1 , relay S2 , relay S3 , relay S4 , relay S5 , relay S6 , relay S7 , relay S8 , relay S9 , relay S10 , relay S11 and relay S12 are all connected to the ACIR test device.

3. A method for detecting a cell charging and discharging circuit, Features: The method requires the use of a detection system as described in any one of claims 1 to 2, comprising the following steps: Step S10, connecting the B1+ pin and B1 s+ pin of the charging and discharging device to the positive electrode ear of the battery cell, and connecting the B1- pin and B1 s- pin to the negative electrode ear of the battery cell; Step S20: After receiving the cell charge and discharge instruction, the charging and discharging device performs internal resistance detection, positive end circuit detection and negative end circuit detection on the cell through the ACIR test device, switch module A, switch module B and switch module C; Step S30: After the detection is passed, the charging and discharging equipment charges and discharges the battery cell.

4. A method for detecting a cell charge and discharge circuit as claimed in claim 3, Features: In the step S20, the internal resistance detection of the battery cell specifically includes: Step S211, the charging and discharging device starts the ACIR test device, and the ACIR test device turns on the relay S5, the relay S6, the relay S7 and the relay S8 of the switch module B; Step S212, the ACIR test device outputs the AC source current Iac through the switch module B to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S213; if not, it indicates that there is a problem with the cell contact and the test is exited; Step S213, the ACIR test device collects the AC internal resistance r of the battery cell, verifies whether the resistance value of the AC internal resistance r is within a preset resistance range, and if so, generates a test result indicating that the internal resistance test is qualified; if not, generates a test result indicating that the internal resistance test is unqualified, and prompts the number of battery cells that fail the internal resistance test.

5. A method for detecting a battery cell charge and discharge circuit as claimed in claim 3, Features: In the step S20, the positive end circuit detection of the battery cell specifically includes: Step S221, the charging and discharging device starts the ACIR test device, and the ACIR test device turns on the relay S1, relay S2, relay S3 and relay S4 of the switch module A; Step S222, the ACIR test device outputs the AC source current Iac through the switch module A to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S223; if not, it indicates that there is a problem with the cell contact and the test is exited; Step S223, the ACIR testing device collects a first AC voltage when the AC source current Iac flows through B1+ and B1s+, and calculates a resistance value r1 based on the AC source current Iac and the first AC voltage; Step S224, the ACIR test device determines whether the resistance r1 is close to zero. If so, a test result indicating that the positive circuit is qualified is generated; if not, a test result indicating that the positive circuit is unqualified is generated, and the number of cells that fail the positive circuit test is indicated.

6. A method for detecting a battery cell charge and discharge circuit as claimed in claim 3, Features: In the step S20, the negative end circuit detection of the battery cell specifically includes: Step S231, the charging and discharging device starts the ACIR test device, and the ACIR test device connects the relay S9, the relay S10, the relay S11 and the relay S12 of the switch module C; Step S232, the ACIR test device outputs the AC source current Iac through the switch module C to check whether the actual value of the AC source current Iac is consistent with the set value. If so, the process proceeds to step S233; if not, it indicates that there is a problem with the cell contact and the test is exited; Step S233, the ACIR testing device collects a second AC voltage when the AC source current Iac flows through B1- and B1s-, and calculates a resistance value r2 based on the AC source current Iac and the second AC voltage; Step S234, the ACIR test device determines whether the resistance value r2 is close to zero. If so, a test result indicating that the negative circuit is qualified is generated; if not, a test result indicating that the negative circuit is unqualified is generated, and the number of cells that fail the negative circuit test is indicated.

Images