Battery pack testing equipment and systems

Abstract

The present application provides a battery pack testing device and system, which relates to the field of battery technology. The device includes: a power supply interface, a first connection module and a second connection module; one end of the power supply interface is used to access direct current, the other end of the power supply interface is electrically connected to one end of the first connection module, and the power supply interface is used to transmit direct current to one end of the first connection module; the other end of the first connection module is used to access the battery pack to be tested, and the first connection module is used to transmit direct current to the battery pack to be tested to supply power to the battery pack to be tested; one end of the first connection module is also connected to one end of the second connection module, and the other end of the second connection module is used to access the test terminal, and the second connection module is used to forward the test instructions sent by the test terminal to the battery pack to be tested via the first connection module, and to read the parameters of the battery pack to be tested via the first connection module and forward them to the test terminal. This solves the problem in the prior art that it is impossible to perform performance testing on the battery pack after repair.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery pack testing device and system. Background Art

[0002] As a key component of electric vehicles, the battery pack outputs electricity to drive the electric vehicle's motor system, interacts with the electric vehicle's charging system for charging management, and interacts with the vehicle control unit (VCU) to manage the vehicle's energy. Therefore, the performance of the battery pack directly determines the electric vehicle's range and safety. However, due to the frequent charging and discharging of battery packs and their high operating intensity, battery packs are prone to failure. Therefore, timely maintenance of the battery pack and testing of its function after repair are essential.

[0003] Currently, the battery pack repair process is relatively complicated, and the repair service stations are equipped with limited testing tools, making it impossible for the staff at the repair service stations to perform performance tests on the repaired battery packs. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery pack testing device and system to address the above-mentioned deficiencies in the prior art, so as to solve the problem in the prior art that staff at maintenance service sites are unable to perform performance tests on repaired battery packs.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery pack testing device, the device comprising: a power supply interface, a first connection module, and a second connection module;

[0007] One end of the power supply interface is used to receive direct current, and the other end of the power supply interface is electrically connected to one end of the first connection module, and the power supply interface is used to transmit the direct current to one end of the first connection module;

[0008] The other end of the first connection module is used to connect to the battery pack to be tested, and the first connection module is used to transmit the direct current to the battery pack to be tested to supply power to the battery pack to be tested;

[0009] One end of the first connection module is also connected to one end of the second connection module, and the other end of the second connection module is used to access the test terminal. The second connection module is used to forward the test instructions sent by the test terminal to the battery pack to be tested via the first connection module, and to read the parameters of the battery pack to be tested via the first connection module and forward them to the test terminal.

[0010] Optionally, if one end of the power supply interface is used to access AC power, the device further includes: a power conversion module;

[0011] The input end of the power conversion module is connected to the other end of the power supply interface, and the output end of the power conversion module is electrically connected to one end of the first connection module. The power conversion module is used to convert the alternating current connected to the power supply interface and output the direct current obtained after conversion to one end of the first connection module via the output end of the power conversion module.

[0012] Optionally, the first connection module includes: a first connector, each end of the first connector includes a plurality of pins, and each pin at the other end of the first connector is used to correspond to and connect with each signal line of the battery pack to be tested.

[0013] Optionally, the second connection module includes: a first on-vehicle diagnostic interface, one end of the first on-vehicle diagnostic interface includes: a first pin and a second pin;

[0014] The first pin and the second pin are respectively connected to a body controller area network high level pin and a body controller area network low level pin among a plurality of pins at one end of the first connector.

[0015] Optionally, the device further includes: a third connection module and a fourth connection module;

[0016] One end of the third connection module is used to connect to a vehicle wiring harness, wherein the vehicle wiring harness is a wiring harness used to connect the battery pack to be tested and the vehicle on which the battery pack to be tested is installed;

[0017] The other end of the third connection module is connected to one end of the first connector, and the third connection module is used to charge the battery pack to be tested via the first connector;

[0018] One end of the fourth connection module is respectively connected to the other end of the third connection module and one end of the first connector, the other end of the fourth connection module is used to connect to the test terminal, and the fourth connection module is used to read the charging information of the battery pack to be tested via the first connector and forward it to the test terminal.

[0019] Optionally, the third connection module includes: a second connector, each end of the second connector includes a plurality of pins, and each pin at the other end of the second connector is used to correspond one-to-one with and be connected to each pin at one end of the first connector.

[0020] Optionally, the fourth connection module: a second on-vehicle diagnostic interface, one end of the second on-vehicle diagnostic interface includes: a third pin and a fourth pin;

[0021] The third pin and the fourth pin are respectively connected to the fast charge controller LAN high level pin and the fast charge controller LAN low level pin among the multiple pins at one end of the first connector, and are connected to the fast charge controller LAN high level pin and the fast charge controller LAN low level pin among the multiple pins at one end of the second connector.

[0022] Optionally, the device further comprises: a first switch;

[0023] One end of the first switch is connected to the other end of the power supply interface, and the other end of the first switch is connected to one end of the first connection module. The first switch is used to control whether the direct current is transmitted to the battery pack to be tested via the first connection module to supply power to the battery pack to be tested.

[0024] Optionally, the device further comprises: a first switch component; wherein the first switch component comprises: a second switch and a first resistor; the second switch is connected in parallel with the first resistor;

[0025] One end of the first switch component is connected to one end of the second connection module, and the other end of the first switch component is respectively connected to one end of the first connection module. The second switch in the first switch component is used to control whether the test instruction issued by the test terminal is forwarded to the battery pack to be tested via the first connection module, and to read the parameters of the battery pack to be tested and forward them to the test terminal.

[0026] Optionally, the device further comprises: a second switch component; wherein the second switch component comprises: a third switch and a second resistor; the third switch is connected in parallel with the second resistor;

[0027] One end of the second switch component is connected to one end of the fourth connection module, and the other end of the second switch component is respectively connected to the other end of the third connection module and one end of the first connection module. The third switch in the second switch component is used to control whether the charging information of the battery pack to be tested is read via the first connection module and forwarded to the test terminal.

[0028] In a second aspect, an embodiment of the present application further provides a battery pack testing system, the system comprising the battery pack testing device and a test terminal provided in the first aspect above; wherein the test terminal is communicatively connected to a second connection module in the battery pack testing device;

[0029] The test terminal is used to send a test instruction to the battery pack to be tested via the second connection module and the first connection module in the battery pack testing device, so as to control the relay in the battery pack to be tested to perform a pickup operation;

[0030] The test terminal is further configured to read and display parameters of the battery pack to be tested via the first connection module and the second connection module.

[0031] The beneficial effects of this application are:

[0032] The present application provides a battery pack testing device and system, which includes: a power supply interface, a first connection module and a second connection module; one end of the power supply interface is used to connect to direct current (DC) power, the other end of the power supply interface is electrically connected to one end of the first connection module, and the power supply interface is used to transmit DC power to one end of the first connection module; the other end of the first connection module is used to connect to a battery pack to be tested, and the first connection module is used to transmit DC power to the battery pack to be tested to supply power to the battery pack to be tested; one end of the first connection module is also connected to one end of the second connection module, and the other end of the second connection module is used to connect to a test terminal, and the second connection module is used to forward the test instructions sent by the test terminal to the battery pack to be tested via the first connection module, and to read the parameters of the battery pack to be tested via the first connection module and forward them to the test terminal. In this solution, one end of the power supply interface is used to receive direct current (DC), and the other end of the power supply interface is electrically connected to one end of the first connection module. The other end of the first connection module is used to receive a battery pack to be tested (the battery pack to be tested is an independent battery pack that has been repaired and not installed on the vehicle). This allows the DC power received to be transmitted to the battery pack to be tested via the power supply interface and the first connection module to power the battery pack to be tested, thereby ensuring that the independent battery pack can operate normally after repair. At the same time, one end of the first connection module is also connected to one end of the second connection module. The other end of the second connection module is used to receive a test terminal, so that the test instructions issued by the test terminal can be forwarded to the battery pack to be tested via the second connection module and the first connection module, and the parameters of the battery pack to be tested can be read during operation. Therefore, the battery pack testing device proposed in this application can efficiently perform performance testing on independent battery packs after repair (i.e., not installed on the vehicle), improve the testing efficiency of the repaired battery pack, effectively solve the problem in the prior art that the staff of the repair service station cannot perform performance testing on the repaired battery pack, and greatly shorten the after-sales maintenance cycle of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 Schematic diagram of the structure of the battery pack testing device provided in the embodiment of the present application Figure 1 ;

[0035] Figure 2 Schematic diagram of the test interface on the test terminal provided in the embodiment of the present application Figure 1 ;

[0036] Figure 3 Schematic diagram of the test interface on the test terminal provided in the embodiment of the present application Figure 2 ;

[0037] Figure 4 Schematic diagram of the structure of the battery pack testing device provided in the embodiment of the present application Figure 2 ;

[0038] Figure 5 Schematic diagram of the structure of the battery pack testing device provided in the embodiment of the present application Figure 3 ;

[0039] Figure 6 Schematic diagram of the structure of the battery pack testing device provided in the embodiment of the present application Figure 4 ;

[0040] Figure 7 Schematic diagram of the structure of the battery pack testing device provided in the embodiment of the present application Figure 5 ;

[0041] Figure 8 Schematic diagram of the structure of the battery pack testing device provided in the embodiment of the present application Figure 6 ;

[0042] Figure 9 A schematic diagram of the structure of a battery pack testing system provided in an embodiment of the present application.

[0043] Icon: 100-battery pack testing device; 101-power supply interface; 102-first connection module; 103-second connection module; 401-power conversion module; 501-third connection module; 502-fourth connection module; 900-battery pack testing system; 901-test terminal. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application are only for the purpose of illustration and description and are not used to limit the scope of protection of the present application.

[0045] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0046] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0047] First, before providing a detailed description of the technical solution provided in this application, a brief description of the relevant background involved in this application is given.

[0048] As a key component of electric vehicles, battery packs are subject to frequent charging and discharging, and their high workload makes them prone to failure. Therefore, it is crucial to promptly repair battery packs and verify their proper function after repair.

[0049] Currently, the battery pack repair process is complex, and repair service centers are equipped with limited testing tools, making it difficult for service center staff to perform performance tests on repaired battery packs. Consequently, most repair centers simply return faulty battery packs to the original battery factory for repair and then perform performance tests on the repaired packs. This can lead to lengthy after-sales repair cycles and a reduced user experience.

[0050] In order to solve the technical problems existing in the above-mentioned prior art, the present application proposes a battery pack testing device, which includes: a power supply interface, a first connection module and a second connection module, wherein one end of the power supply interface is used to connect to direct current, the other end of the power supply interface is electrically connected to one end of the first connection module, and the other end of the first connection module is used to connect to the battery pack to be tested (the battery pack to be tested is an independent battery pack that has been repaired and not installed on the vehicle), so that the connected direct current can be transmitted to the battery pack to be tested via the power supply interface and the first connection module to supply power to the battery pack to be tested, so as to ensure that the independent battery pack can work normally after repair; at the same time, one end of the first connection module is also connected to one end of the second connection module, and the other end of the second connection module is used to connect to the test terminal, so that the test instructions issued by the test terminal can be forwarded to the battery pack to be tested via the second connection module and the first connection module, and the parameters of the battery pack to be tested during operation can be read. Therefore, the battery pack testing device proposed in this application can efficiently realize the performance test of the independent battery pack after repair (i.e., not installed on the vehicle), improve the testing efficiency of the battery pack after repair, and effectively solve the problem in the prior art that the staff of the repair service station cannot perform performance test on the battery pack after repair, thereby greatly shortening the after-sales maintenance cycle of the battery pack.

[0051] The following is a brief description of the structural schematic diagram of the battery pack testing device provided in this application through multiple embodiments.

[0052] refer to Figure 1 As shown, the battery pack testing device 100 provided in this application includes: a power supply interface 101 , a first connection module 102 and a second connection module 103 .

[0053] The model of the first connection module 102 needs to match the model of the battery pack to be tested, and the model of the first connection module 102 is not specifically limited here.

[0054] One end of the power supply interface 101 is used to receive direct current power, and the other end of the power supply interface 101 is electrically connected to one end of the first connection module 102. The power supply interface 101 is used to transmit the received direct current power to one end of the first connection module 102. For example, one end of the power supply interface 101 is connected to 12V direct current power provided by a battery charger (or other energy storage unit), and the received direct current power is transmitted to the first connection module 102 via the power supply interface 101.

[0055] The other end of the first connection module 102 is used to connect to the battery pack under test, and the first connection module 102 is used to transmit direct current to the battery pack under test to supply power to the battery pack under test.

[0056] It is worth noting that the battery pack under test in this embodiment is a standalone battery pack that has been repaired and not installed in a vehicle. Direct current can be transmitted to the battery pack under test via the power supply interface 101 and the first connection module 102 to provide power to the battery pack under test, thereby ensuring that the battery pack, which has been repaired and not installed in a vehicle, can function normally.

[0057] Continue to refer Figure 1 One end of the first connection module 102 is also connected to one end of the second connection module 103, and the other end of the second connection module 103 is used to access the test terminal. The second connection module 103 is used to forward the test instructions sent by the test terminal to the battery pack to be tested via the first connection module 102, and read the parameters of the battery pack to be tested via the first connection module 102 and forward them to the test terminal.

[0058] Among them, the test instruction is used to control the relay in the battery pack to be tested to perform the attraction operation; the parameters of the battery pack to be tested may include at least one of the following: fault level, battery pack voltage, battery pack current, maximum cell voltage, minimum cell voltage, minimum cell temperature, maximum cell temperature, battery displayed state of charge (State of Charge, abbreviated as SOC), and battery actual SOC.

[0059] For example, the test terminal can be a mobile phone, computer, tablet computer or other electronic device with operation and display functions. Figure 2 The following is a schematic diagram of the test interface displayed on the test terminal. Figure 1 The test interface includes multiple controls, such as a relay test control and a test value control. The test terminal responds to a user triggering the relay test control to forward the issued test instruction to the battery pack under test via the second connection module 103 and the first connection module 102. Alternatively, the test terminal responds to a user triggering the test value control to read the parameters of the battery pack under test via the second connection module 103 and the first connection module 102.

[0060] Optionally, after the battery pack under test receives the test instruction, if the user can clearly hear the sound produced by the relay in the battery pack under test closing, it can be determined that the relay in the battery pack under test is functioning normally; if the user does not hear any sound, it can be determined that the relay in the battery pack under test is faulty. In this way, the relay in the battery pack under test can be troubleshooted and the test accuracy of the battery pack under test can be improved.

[0061] refer to Figure 3 The following is a schematic diagram of the test interface displayed on the test terminal. Figure 2The test terminal responds to the user's triggering operation on the test value control, and reads the parameters of the battery pack to be tested through the second connection module 103 and the first connection module 102. For example, the parameters of the battery pack to be tested are: the fault level is a low-voltage fault, the battery pack voltage is 352V, the battery pack current is 0A, the maximum cell voltage is 3.685V, the minimum cell voltage is 3.676V, the minimum cell temperature is 22 degrees Celsius, the maximum cell temperature is 23 degrees Celsius, the battery display SOC is 42, and the battery actual SOC is 41. The test terminal displays the read parameters of the battery pack to be tested on the test interface, so that the maintenance staff can compare the read parameters of the battery pack to be tested with the standard parameters to quickly troubleshoot and analyze the problem.

[0062] In summary, an embodiment of the present application provides a battery pack testing device, which includes: a power supply interface, a first connection module and a second connection module; one end of the power supply interface is used to connect to direct current power, and the other end of the power supply interface is electrically connected to one end of the first connection module, and the power supply interface is used to transmit direct current power to one end of the first connection module; the other end of the first connection module is used to connect to the battery pack to be tested, and the first connection module is used to transmit direct current power to the battery pack to be tested to power the battery pack to be tested; one end of the first connection module is also connected to one end of the second connection module, and the other end of the second connection module is used to connect to the test terminal, and the second connection module is used to forward the test instructions sent by the test terminal to the battery pack to be tested via the first connection module, and read the parameters of the battery pack to be tested via the first connection module and forward them to the test terminal. In this solution, one end of the power supply interface is used to receive direct current (DC), and the other end of the power supply interface is electrically connected to one end of the first connection module. The other end of the first connection module is used to receive a battery pack to be tested (the battery pack to be tested is an independent battery pack that has been repaired and not installed on the vehicle), so that the DC power received can be transmitted to the battery pack to be tested via the power supply interface and the first connection module to power the battery pack to be tested, thereby ensuring that the independent battery pack can operate normally after repair. At the same time, one end of the first connection module is also electrically connected to one end of the second connection module. The other end of the second connection module is used to receive a test terminal, so that the test instructions issued by the test terminal can be forwarded to the battery pack to be tested via the second connection module and the first connection module, and the parameters of the battery pack to be tested can be read during operation. Therefore, the battery pack testing device proposed in this application can efficiently perform performance testing on independent battery packs after repair (i.e., not installed on the vehicle), improve the testing efficiency of the repaired battery pack, effectively solve the problem in the prior art that the staff of the repair service station cannot perform performance testing on the repaired battery pack, and greatly shorten the after-sales maintenance cycle of the battery pack.

[0063] The structure of another battery pack testing device is introduced below.

[0064] Optionally, refer to Figure 4 As shown, if one end of the power supply interface 101 is used to access AC power, Figure 1 On the basis of , the battery pack testing device 100 further includes a power conversion module 401. Exemplarily, for example, the power conversion module 401 can be an AC to DC inverter.

[0065] Among them, the input end of the power conversion module 401 is connected to the other end of the power supply interface 101, and the output end of the power conversion module 401 is electrically connected to one end of the first connection module 102. The power conversion module 401 is used to convert the alternating current connected by the power supply interface 101, and output the direct current obtained after conversion to one end of the first connection module 102 via the output end of the power conversion module 401.

[0066] In this embodiment, one end of the power supply interface 101 can receive 220V AC power. The power conversion module 401 converts the AC power received by the power supply interface 101 into 12V DC power. The converted DC power is then output to one end of the first connection module 102 via the output end of the power conversion module 401. The first connection module 102 then transmits the DC power to the battery pack under test to ensure normal operation of the battery pack under test. This improves the flexibility and practicality of the battery pack testing device.

[0067] The connection relationship between the pins in the first connection module will be described through the following embodiments.

[0068] Optionally, the first connection module 102 includes: a first connector, each end of the first connector includes a plurality of pins, and each pin at the other end of the first connector is used to correspond to and connect with each signal line of the battery pack to be tested.

[0069] For example, the model of the first connector is HC 18B-S32, both ends of the first connector contain 32 pins, the battery pack to be tested contains 32 signal lines, and the pins at the other end of the first connector are used to correspond one-to-one and connect to each signal line of the battery pack to be tested.

[0070] Among them, the battery pack to be tested contains 32 signal lines: KL30, KL15, KL30, normally closed point (NormallyClose, referred to as NC), A+ (fast charging wake-up signal), slow charging activation, body ground, fast charging temperature sensor 1-, fast charging temperature sensor 2+, fast charging temperature sensor 2-, A- (fast charging wake-up signal ground), high voltage interlock+, high voltage interlock-, NC, wake up charge (wake up obc), CC2 (fast charging connection indicator light), body CANH, body CANL, NC, fast charging CANL, calibration CANH, calibration CANL, internal CANL, internal CANH, crash signal (crash singal), NC, VCU_WK, fast charging temperature sensor 1+, CC out, NC, fast charging CANH, NC.

[0071] Among them, KL30 is the normal power and KL15 is the ON power.

[0072] The connection relationship between the pins in the second connection module will be introduced through the following embodiments.

[0073] Optionally, the second connection module 103 includes: a first on-board diagnostics (OBD) interface, and one end of the first OBD interface includes: a first pin and a second pin.

[0074] In this embodiment, for example, the first OBD interface may be a 16-pin trapezoidal interface, i.e., each end of the first OBD interface includes 16 pins. Here, only the connection relationship of two pins (i.e., the first pin and the second pin) at one end of the first OBD interface is described.

[0075] Among them, the first pin can be connected to the body controller local area network high level (Controller Area Network High, referred to as CANH) pin among multiple pins at one end of the first connector, and the second pin is connected to the body CANL pin among multiple pins at one end of the first connector.

[0076] The pins at the other end of the first OBD interface are respectively used to connect to the test terminal.

[0077] In order to test the battery pack installed on the vehicle, Figure 1 or Figure 2 On this basis, the present application also provides another structure of a battery pack testing device, which will be introduced below.

[0078] In this embodiment, the first connection module 102 includes: a first connector.

[0079] refer to Figure 5 As shown, Figure 5 Only the Figure 1 On the basis of the above, the battery pack testing device 100 further includes: a third connection module 501 and a fourth connection module 502. Figure 4 On the basis of, the battery pack testing device 100 may also include: a third connection module 501 and a fourth connection module 502.

[0080] One end of the third connection module 501 is used to connect to the vehicle wiring harness of the vehicle, wherein the vehicle wiring harness is a wiring harness used to connect the battery pack to be tested and the vehicle on which the battery pack to be tested is installed.

[0081] The other end of the third connection module 501 is connected to one end of the first connector. The third connection module 501 is used to charge the battery pack under test via the first connector. The vehicle can charge the battery pack under test via the third connection module 501 and the first connector in fast charging mode (or normal mode).

[0082] One end of the fourth connection module 502 is respectively connected to the other end of the third connection module 501 and one end of the first connector. The other end of the fourth connection module 502 is used to access the test terminal. The fourth connection module 502 is used to read the charging information of the battery pack to be tested via the first connector, and forward the charging information read during fast charging of the battery pack to be tested to the test terminal.

[0083] Among them, one end of the fourth connection module 502 is connected to the other end of the third connection module 501, mainly so that the vehicle can supply power to the fourth connection module 502 via the third connection module 501 to ensure that the fourth connection module 502 can work normally.

[0084] In this embodiment, the power supply interface 101 is not connected to direct current, that is, the battery pack under test is no longer powered by external direct current, and the power required by the battery pack under test is directly derived from the vehicle in which the battery pack under test is installed.

[0085] Specifically, one end of the third connection module 501 is connected to the vehicle's wiring harness, and the other end of the third connection module 501 is connected to one end of the first connector. In fast charging mode, the vehicle can quickly charge the battery pack to be tested via the third connection module 501 and the first connector to ensure that the battery pack to be tested can be charged normally. At the same time, one end of the fourth connection module 502 is respectively connected to the other end of the third connection module 501 and one end of the first connector, and the other end of the fourth connection module 502 is connected to the test terminal. In this way, when the vehicle is in fast charging mode and does not affect the normal operation of the vehicle (or the battery pack to be tested), the test terminal can also accurately read the parameters of the battery pack to be tested and / or the charging data during charging via the fourth connection module 502 and the first connector, so that maintenance diagnostic personnel can quickly troubleshoot and analyze problems based on the charging information of the battery pack to be tested.

[0086] The above-mentioned Figure 5 The connection relationship of each pin in the third connection module 501 is introduced.

[0087] Optionally, the third connection module 501 includes: a second connector, each end of the second connector includes a plurality of pins, and each pin at the other end of the second connector is used to correspond one-to-one with and be connected to each pin at one end of the first connector.

[0088] For example, the model of the second connector may be HC08B-P32R, and both ends of the second connector include 32 pins. The battery pack to be tested includes 32 signal lines, that is, the pins at the other end of the second connector are used to correspond one-to-one and connect with the pins at one end of the first connector.

[0089] The above-mentioned Figure 5 The connection relationship of each pin in the fourth connection module 502 is introduced.

[0090] Optionally, the fourth connection module: a second OBD interface, one end of the second OBD interface includes: a third pin and a fourth pin.

[0091] In this embodiment, for example, the second OBD interface can be a sixteen-pin trapezoidal interface, that is, both ends of the second OBD interface include 16 pins. Here, only the connection relationship of two pins (that is, the third pin and the fourth pin) at one end of the second OBD interface is introduced.

[0092] Among them, the third pin and the fourth pin are respectively connected to the fast charging CANH pin and the fast charging CANL pin among the multiple pins at one end of the first connector, and are connected to the fast charging CANH pin and the fast charging CANL pin among the multiple pins at one end of the second connector; the pins at the other end of the second OBD interface are respectively used to access the test terminal.

[0093] Table 1 is the pin signal diagram of the battery pack test device

[0094]

[0095]

[0096]

[0097] From Table 1, a one-to-one connection relationship between each pin in the first connector and each pin in the second connector can be obtained.

[0098] The first pin at one end of the first OBD interface (i.e., pin 6 in the first OBD interface) is connected to the body CANH pin in the first connector (i.e., pin 17 in the first connector), and the second pin at one end of the first OBD interface (i.e., pin 14 in the first OBD interface) is connected to the body CANL pin in the first connector (i.e., pin 18 in the first connector).

[0099] The third pin at one end of the second OBD interface (i.e., pin 6 in the second OBD interface) is respectively connected to the fast charge CANH pin in the first connector (i.e., pin 31 in the first connector) and the fast charge CANH pin in the second connector (i.e., pin 31 in the second connector);

[0100] The fourth pin at one end of the second OBD interface (i.e., pin 14 in the second OBD interface) is respectively connected to the fast charge CANL pin in the first connector (i.e., pin 20 in the first connector) and the fast charge CANL pin in the second connector (i.e., pin 20 in the second connector).

[0101] Pin 1 of the inverter is connected to pins 1, 2, and 3 of the first connector respectively, and pin 2 of the inverter is connected to pin 7 of the first connector.

[0102] For the safety of the battery pack test device during use, the present application proposes that the other end of the power supply interface (or Figure 2At least one switch switching unit is provided at each end of the power conversion module, one end of the second connection module, and one end of the fourth connection module. Before testing the battery pack to be tested, each switch switching unit is manually opened. After each connection module in the battery pack testing device is correspondingly connected to the battery pack to be tested (or the test terminal), and / or the whole vehicle wiring harness is connected, each switch switching unit is manually closed to ensure safety during the performance test of the battery pack to be tested.

[0103] The connection relationship between the switch units in the battery pack testing device will be explained in detail through the following embodiments.

[0104] Optionally, continue to refer to Figure 6 As shown, the battery pack testing device 100 further includes: a first switch S1.

[0105] One end of the first switch S1 is connected to the other end of the power supply interface 101, and the other end of the first switch S1 is connected to one end of the first connection module 102. The first switch S1 is used to control whether the connected DC power is transmitted to the battery pack to be tested via the first connection module 102 to power the battery pack to be tested.

[0106] Optionally, continue to refer to Figure 6 As shown, the battery pack testing device 100 further includes: a first switch component; wherein the first switch component includes: a second switch S2 and a first resistor R1; the second switch S2 is connected in parallel with the first resistor R1.

[0107] One end of the first switch component is connected to one end of the second connection module 103, and the other end of the first switch component is connected to one end of the first connection module 102. The second switch S2 in the first switch component is used to control whether the test instructions issued by the test terminal are forwarded to the battery pack to be tested via the first connection module 102, and to read the parameters of the battery pack to be tested and forward them to the test terminal.

[0108] In this embodiment, when testing an independent battery pack to be tested, the user manually opens the first switch S1 and the second switch S2 first. When the first connection module 102 in the battery pack testing device is connected to the battery pack to be tested and the second connection module 103 is connected to the test terminal, the first switch S1 and the second switch S2 are manually closed to ensure safety during the performance test of the battery pack to be tested.

[0109] Optionally, continue to refer to Figure 6 As shown, the device further includes: a second switch component; wherein the second switch component includes: a third switch S3 and a second resistor R2; the third switch S3 is connected in parallel with the second resistor R2.

[0110] One end of the second switch component is connected to one end of the fourth connection module 502, and the other end of the second switch component is respectively connected to the other end of the third connection module 501 and one end of the first connection module 102. The third switch S3 in the second switch component is used to control whether the charging information of the battery pack to be tested is read through the first connection module 102 and forwarded to the test terminal.

[0111] In this embodiment, when testing the battery pack to be tested that has been installed on the vehicle, the user manually opens the third switch S3 first. When the first connection module 102 in the battery pack testing device is connected to the battery pack to be tested, the third connection module 501 is connected to the vehicle wiring harness, and the fourth connection module 502 is connected to the test terminal, the third switch S3 is manually closed to ensure safety during the performance test of the battery pack to be tested.

[0112] Figure 7 For the above Figure 6 On the basis of this, when the battery pack testing device 100 includes: a power conversion module 401, the connection relationship of the first switch S1 in each switch switching unit in the battery pack testing device 100, one end of the first switch S1 is connected to the output end of the power conversion module 401, and the other end of the first switch S1 is connected to one end of the first connection module 102, and the first switch S1 is used to control whether the connected DC power is transmitted to the battery pack to be tested via the first connection module 102 to supply power to the battery pack to be tested.

[0113] In order to ensure the portability of the battery pack testing device during use, the present application proposes another structure of a battery pack testing device, namely, integrating the signal lines in the battery pack testing device into a bus bundle (wherein the bus bundle contains 32 signal lines), so that each connection module only needs to be connected to the corresponding signal line in the bus bundle according to its own needs.

[0114] refer to Figure 8 As shown in the above Figure 7 On the basis of the above Table 1, each pin at the other end of the first connector and each pin of the second connector are matched one by one with each signal line in the bus bundle and connected.

[0115] A first pin at one end of the first OBD interface is connected to a signal line of a vehicle body CANL in the bus bundle, and a second pin is connected to a signal line of a vehicle body CANH in the bus bundle.

[0116] The third pin at one end of the second OBD interface is connected to the signal line of the fast charge CANL in the bus bundle, and the fourth pin is connected to the signal line of the fast charge CANH in the bus bundle.

[0117] Pin 1 of the inverter's output terminal is connected to the signal lines of KL30, KL15, and KL30C in the bus bundle, and pin 2 of the inverter's output terminal is connected to the vehicle body ground in the bus bundle.

[0118] The following examples will explain in detail that this application also provides a battery pack testing system.

[0119] Optionally, refer to Figure 9 As shown, the battery pack testing system 900 includes: the battery pack testing device 100 provided in the above embodiment, and a test terminal 901; wherein the test terminal 901 is communicatively connected with the second connection module in the battery pack testing device.

[0120] The test terminal 901 is used to send test instructions to the battery pack to be tested via the second connection module and the first connection module in the battery pack testing device to control the relay in the battery pack to be tested to perform a suction operation; the test terminal is also used to read and display the parameters of the battery pack to be tested via the first connection module and the second connection module.

[0121] Optionally, the test terminal 901 is communicatively connected to a fourth connection module in the battery pack testing device.

[0122] The test terminal 901 is used to read and display the charging information of the battery pack to be tested via the fourth connection module and the first connection module in the battery pack testing device.

[0123] The specific working process and beneficial effects of the above embodiments have been described in detail and will not be repeated here.

[0124] The above modules can be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), one or more digital singnal processors (DSPs), or one or more field programmable gate arrays (FPGAs). For another example, when a module is implemented by scheduling program code through a processing element, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0125] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0126] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0127] In addition, the functional units in various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or hardware plus software functional units.

[0128] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviated: ROM), a random access memory (English: Random Access Memory, abbreviated: RAM), a magnetic disk or an optical disk, and other media that can store program code.

Claims

1. A battery pack testing device, characterized in that: The device includes: a power supply interface, a first connection module and a second connection module; One end of the power supply interface is used to receive direct current, and the other end of the power supply interface is electrically connected to one end of the first connection module, and the power supply interface is used to transmit the direct current to one end of the first connection module; The other end of the first connection module is used to connect to the battery pack to be tested, and the first connection module is used to transmit the direct current to the battery pack to be tested to supply power to the battery pack to be tested; One end of the first connection module is also connected to one end of the second connection module, and the other end of the second connection module is used to connect to the test terminal. The second connection module is used to forward the test instructions sent by the test terminal to the battery pack under test via the first connection module, and read the parameters of the battery pack under test via the first connection module and forward them to the test terminal; Wherein, the first connection module includes: a first connector; The device further includes: a third connection module and a fourth connection module; One end of the third connection module is used to connect to a vehicle wiring harness, wherein the vehicle wiring harness is a wiring harness used to connect the battery pack to be tested and the vehicle on which the battery pack to be tested is installed; The other end of the third connection module is connected to one end of the first connector, and the third connection module is used to charge the battery pack to be tested via the first connector; One end of the fourth connection module is respectively connected to the other end of the third connection module and one end of the first connector, the other end of the fourth connection module is used to connect to the test terminal, and the fourth connection module is used to read the charging information of the battery pack to be tested via the first connector and forward it to the test terminal.

2. The device according to claim 1, characterized in that Both ends of the first connector include a plurality of pins, and the pins at the other end of the first connector are respectively used to correspond to and be connected to the signal lines of the battery pack to be tested.

3. The device according to claim 2, characterized in that The second connection module includes: a first on-vehicle diagnostic interface, one end of the first on-vehicle diagnostic interface includes: a first pin and a second pin; The first pin and the second pin are respectively connected to a body controller area network high level pin and a body controller area network low level pin among a plurality of pins at one end of the first connector.

4. The device according to claim 1, characterized in that The third connection module includes: a second connector, wherein both ends of the second connector each include a plurality of pins, and the pins at the other end of the second connector are used to correspond one-to-one with and be connected to the pins at one end of the first connector.

5. The device according to claim 4, characterized in that The fourth connection module: a second on-vehicle diagnostic interface, one end of the second on-vehicle diagnostic interface includes: a third pin and a fourth pin; The third pin and the fourth pin are respectively connected to the fast charge controller LAN high level pin and the fast charge controller LAN low level pin among the multiple pins at one end of the first connector, and are connected to the fast charge controller LAN high level pin and the fast charge controller LAN low level pin among the multiple pins at one end of the second connector.

6. The device according to claim 1, characterized in that The device further includes: a first switch; One end of the first switch is connected to the other end of the power supply interface, and the other end of the first switch is connected to one end of the first connection module. The first switch is used to control whether the direct current is transmitted to the battery pack to be tested via the first connection module to supply power to the battery pack to be tested.

7. The device according to claim 1, characterized in that The device further includes: a first switch component; wherein the first switch component includes: a second switch and a first resistor; the second switch is connected in parallel with the first resistor; One end of the first switch component is connected to one end of the second connection module, and the other end of the first switch component is connected to one end of the first connection module. The second switch in the first switch component is used to control whether the test instruction issued by the test terminal is forwarded to the battery pack to be tested via the first connection module, and to read the parameters of the battery pack to be tested and forward them to the test terminal.

8. The device according to claim 1, characterized in that The device further includes: a second switch component; wherein the second switch component includes: a third switch and a second resistor; the third switch is connected in parallel with the second resistor; One end of the second switch component is connected to one end of the fourth connection module, and the other end of the second switch component is respectively connected to the other end of the third connection module and one end of the first connection module. The third switch in the second switch component is used to control whether the charging information of the battery pack to be tested is read via the first connection module and forwarded to the test terminal.

9. A battery pack testing system, characterized in that: The system comprises the battery pack testing device and the test terminal according to any one of claims 1 to 8; wherein the test terminal is communicatively connected to the second connection module in the battery pack testing device; The test terminal is used to send a test instruction to the battery pack to be tested via the second connection module and the first connection module in the battery pack testing device, so as to control the relay in the battery pack to be tested to perform a pickup operation; The test terminal is further configured to read and display parameters of the battery pack to be tested via the first connection module and the second connection module.

Images