CN220913306U

CN220913306U - Battery pack testing system

Info

Publication number: CN220913306U
Application number: CN202322354825.0U
Authority: CN
Inventors: 胡文斌
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-05-07
Anticipated expiration: 2033-08-30

Abstract

The application relates to a battery pack testing system, which comprises a control device, an electric connector, a detection device and a charge-discharge testing cabinet, wherein the control device comprises a switch module and a control module for controlling the switch module to be closed or opened, the detection device comprises a detection module and a display module, the detection module and the control module are respectively connected with the display module, the front positive electrode end and the front negative electrode end of the switch module are respectively connected with the positive electrode and the negative electrode of a battery pack to be tested through the electric connector, the rear positive electrode end and the rear negative electrode end of the switch module are respectively connected with the positive electrode input end and the negative electrode input end of the charge-discharge testing cabinet, the detection module is connected with the front positive electrode end and the front negative electrode end of the switch module and is used for carrying out static test on the battery pack to be tested, and the charge-discharge testing cabinet is used for carrying out charge-discharge test on the battery pack to be tested when the switch module is closed.

Description

Battery pack testing system

Technical Field

The application relates to the technical field of electric energy, in particular to a battery pack testing system.

Background

In the production process of the battery pack, static tests and charge and discharge tests are required to be carried out on the battery pack, wherein the static tests comprise an insulation voltage withstanding test and a static internal resistance test. The traditional test mode is that an operator holds a positive and negative meter pen of the measuring instrument, connects the positive and negative meter pen with the positive and negative poles of the battery pack, and then checks the measurement result of the measuring instrument. However, in the above manner, an operator needs to hold the positive and negative meter pen to contact with the positive and negative electrodes of the battery pack in the test process, so that the risk of high-voltage electric shock exists, and the risk of high-voltage electric shock has a great potential safety hazard. In addition, in the existing test mode, the static test and the charge and discharge test are usually separate tests, for example, after the static test, the connection between the positive and negative meter pens and the battery pack is released, then the charge and discharge test cabinet is connected with the battery pack, and then the charge and discharge test is performed, so that the operation is complicated, and the test efficiency is low.

Disclosure of utility model

Based on this, it is necessary to provide a battery pack testing system aiming at the technical problems, which can avoid the direct contact of operators with the anode and the cathode of the battery pack, thereby eliminating the potential safety hazards of electric shock and improving the testing efficiency.

In a first aspect, the present application provides a battery pack testing system comprising:

The control device comprises a switch module and a control module, wherein the switch module comprises a front positive electrode end, a front negative electrode end, a control end, a rear positive electrode end and a rear negative electrode end, the control module is connected with the control end and used for controlling the switch module to be closed or opened, and then the front positive electrode end and the front negative electrode end are correspondingly connected or disconnected with the rear positive electrode end and the rear negative electrode end respectively;

The front positive electrode end and the front negative electrode end are respectively connected with the positive electrode and the negative electrode of the battery pack to be tested through the electric connectors;

The detection device comprises a detection module, a display module, an anode detection line, a cathode detection line and a reference ground line, wherein the detection module is respectively connected with the front anode end and the front cathode end through the anode detection line and the cathode detection line, the detection module is connected with a shell grounding piece of a battery pack to be detected through the reference ground line, the detection module and a control module are respectively connected with the display module, and the detection module is used for receiving a static test instruction input by an operator through the display module and carrying out static test on the battery pack to be detected according to the static test instruction;

The charge-discharge test cabinet is provided with an anode input end and a cathode input end, the anode input end and the cathode input end are respectively connected with the rear anode end and the rear cathode end, the control module is used for receiving a switch closing instruction input by an operator through the display module and controlling the switch module to be closed according to the switch closing instruction, and the charge-discharge test cabinet is used for carrying out charge-discharge test on the battery pack to be tested when the switch module is closed.

Further, the detection module is further connected with a low-voltage communication interface of the battery pack to be detected through a first communication line, and is used for obtaining battery parameters of the single batteries in the battery pack to be detected through the first communication line, and the display module is further used for displaying the battery parameters;

The detection module is also used for judging whether the battery parameters have abnormal parameters, and if so, the display module is also used for displaying prompt information corresponding to the abnormal parameters.

Further, the battery pack testing system further comprises an upper computer, the detection module is connected with the upper computer through a second communication line, and the detection module is further used for sending the battery parameters to the upper computer through the second communication line for storage.

Further, the detection module is further configured to send test data of the static test to the display module for display and to send the test data to the upper computer for storage.

Further, the charge and discharge test cabinet is also provided with an anode voltage acquisition end and a cathode voltage acquisition end, the anode voltage acquisition end and the cathode voltage acquisition end are respectively connected with an anode input end and a cathode input end of the charge and discharge test cabinet, and the charge and discharge test cabinet is connected with the upper computer through a third communication line;

The charging and discharging test cabinet is also used for respectively collecting voltage values of the positive electrode input end and the negative electrode input end through the positive electrode voltage collecting end and the negative electrode voltage collecting end, and sending the collected voltage values and test data of the charging and discharging test to the upper computer for storage.

Further, the detection module is further used for obtaining the total positive voltage value and the total negative voltage value of the battery pack to be detected, and sending the total positive voltage value and the total negative voltage value of the battery pack to be detected to an upper computer for storage;

the upper computer is used for controlling the charge and discharge test cabinet to perform charge and discharge tests when no abnormal parameter exists in the battery parameters, and the total voltage value of the positive electrode and the total voltage value of the negative electrode of the battery pack to be tested are respectively within a preset range with the difference value range of the voltage values of the positive electrode input end and the negative electrode input end acquired by the charge and discharge test cabinet.

Further, the battery parameters include voltage, temperature, maximum differential pressure value, and maximum temperature difference value of the unit battery.

Further, the control module is further configured to obtain closing state information of the switch module, and send the closing state information to the display module for display.

Further, the battery pack to be tested includes one or more battery packs, and when the battery pack to be tested includes a plurality of battery packs, the plurality of battery packs are connected in series or in parallel.

Further, the number of the battery pack groups to be tested, the electric connectors and the switch modules is multiple, the rear positive ends of all the switch modules are connected together and connected with the positive input end, the rear negative ends of all the switch modules are connected together and connected with the negative input end, and the control ends of all the switch modules are connected to the control module;

the front positive electrode end and the front negative electrode end of each switch module are respectively connected with the positive electrode and the negative electrode of a tested battery pack group through an electric connector;

The detection module is connected with the front positive electrode end and the front negative electrode end of a switch module respectively through the positive electrode detection line and the negative electrode detection line, and is connected with the shell grounding piece of a battery pack to be detected through the reference ground line.

Further, the electric connector comprises a first interface, a second interface and a connecting wire connected between the first interface and the second interface, wherein the first interface is connected with the positive electrode and the negative electrode of the battery pack to be tested, and the second interface is connected with the front positive electrode end and the front negative electrode end of the switch module.

The above describes a battery pack test system, including a control device, an electric connector, a detection device and a charge-discharge test cabinet, wherein the control device includes a switch module and a control module for controlling the switch module to be closed or opened, the detection device includes a detection module and a display module, the detection module and the control module are respectively connected with the display module, the front positive pole end and the front negative pole end of the switch module are respectively connected with the positive pole and the negative pole of the battery pack to be tested through the electric connector, the rear positive pole end and the rear negative pole end of the switch module are respectively connected with the positive pole input end and the negative pole input end of the charge-discharge test cabinet, the detection module is respectively connected with the front positive pole end and the front negative pole end of the switch module through the positive pole detection line and the negative pole detection line, thereby realizing that the detection module is connected with the positive pole and the negative pole of the battery pack to be tested, the detection module receives static test instructions input by an operator through the display module, then static test is performed according to the static test instructions, the control module receives switch closing instructions input by the operator, and controls the switch module to be closed according to the switch closing instructions, the switch module is connected with the positive pole input by the display module, when the switch module is connected with the battery pack to be tested, and the static test is directly triggered by the switch module, and the electric shock protection is required to be directly connected with the battery pack to be tested, and the battery pack is directly tested by the positive and negative pole, and the electric shock protection is prevented from being directly connected with the battery pack to be electrically tested, after the static test is finished, an operator only needs to input a switch closing instruction through the display module to enable the control module to control the switch module to be closed, so that the charge and discharge test can be rapidly carried out, the operation is simple, and the detection efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a battery pack testing system according to the present application;

Fig. 2 is a schematic diagram of a battery pack testing system for testing a plurality of battery packs according to the present application.

Reference numerals in the embodiments of the present application are described below:

Battery pack test system: 100; the control device: 10; and a switch module: 101; front positive terminal: 1011; front negative terminal: 1012; rear positive terminal: 1013 (1013); rear negative terminal: 1014; and the control end: 1015; and the control module is used for: 102, a step of; an electrical connector: 20, a step of; the detection device comprises: 30; and a detection module: 301; and a display module: 302; positive electrode detection line: 303; negative electrode detection line: 304; reference ground wire: 305; fourth communication line: 306. A first communication line: 307. A second communication line: 308. Charging and discharging test cabinet: 40, a step of performing a; positive electrode input terminal: 401; negative electrode input end: 402; positive electrode voltage acquisition end: 403; negative voltage acquisition end: 404; third communication line: 405; the battery pack to be tested: 50; and (3) battery pack: 501. 502, 503; the upper computer: 60.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

When a static test is performed on a battery pack, a traditional test mode is that an operator holds a positive and negative meter pen of a measuring instrument in a hand, connects the positive and negative meter pen with the positive and negative poles of the battery pack, and then checks the measurement result of the measuring instrument. However, in the above manner, an operator needs to hold the positive and negative meter pen to contact with the positive and negative electrodes of the battery pack in the test process, so that the risk of high-voltage electric shock exists, and the risk of high-voltage electric shock has a great potential safety hazard. In addition, the static test and the charge and discharge test are usually separate tests, for example, after the static test, the connection between the positive and negative meter pens and the battery pack is released, then the charge and discharge test cabinet is connected with the battery pack, and then the charge and discharge test is performed, so that the operation is complicated, and the test efficiency is low.

The application provides a battery pack testing system based on the defects, which can prevent an operator from directly contacting the anode and the cathode of a battery pack to be tested in the static testing process, and can rapidly perform charge and discharge testing after the static testing is finished by the action of the switch module, so that the operation is simple, and the testing efficiency can be improved.

The present application will be described in detail below.

Referring to fig. 1, a battery pack testing system 100 according to an embodiment of the present application is configured to test a battery pack 50 to be tested, and includes a control device 10, an electrical connector 20, a detection device 30, and a charge/discharge testing cabinet 40. The battery pack 50 includes one battery pack or a plurality of battery packs, and the embodiment shown in fig. 1 is described by taking the example that the battery pack 50 includes 1 battery pack.

More specifically, the control device 10 includes a switch module 101 and a control module 102, the switch module 101 including a front positive terminal 1011, a front negative terminal 1012, a rear positive terminal 1013, a rear negative terminal 1014, and a control terminal 1015. The control module 102 is connected to the control end 1015 of the switch module 101, and is used for controlling the switch module 101 to be turned on or turned off, wherein the front positive electrode end 1011 and the front negative electrode end 1012 of the switch module 101 are respectively connected to the rear positive electrode end 1013 and the rear negative electrode end 1014 in a state where the switch module 101 is turned on, and the front positive electrode end 1011 and the front negative electrode end 1012 are respectively disconnected from the rear positive electrode end 1013 and the rear negative electrode end 1014 in a state where the switch module 101 is turned off.

The front positive electrode terminal 1011 and the front negative electrode terminal 1012 are respectively connected with the positive electrode and the negative electrode of the tested battery pack 50 through the electric connector 20.

The detection device 30 includes a detection module 301, a display module 302, a positive detection line 303, a negative detection line 304, and a reference ground line 305. The detection module 301 is connected to the front positive electrode end 1011 and the front negative electrode end 1012 of the switch module 101 through the positive electrode detection line 303 and the negative electrode detection line 304, respectively, so that the connection between the detection module 301 and the positive electrode and the negative electrode of the battery pack 50 to be detected can be realized. The detection module 301 is connected to a housing ground of the battery pack 50 to be tested, i.e., a housing ground of the battery pack, such as a ground bolt, by means of a reference ground 305.

The detection module 301 and the control module 102 are respectively connected to the display module 302, for example, the control module 102 may be connected to the display module 302 through a fourth communication line 306. The display module 302 may be configured to display a human-computer interaction interface, through which an operator may input a test instruction. The detection module 301 is configured to receive a static test instruction input by an operator through the display module 302, and perform a static test on the tested battery pack 50 according to the static test instruction. The static test includes an insulation voltage withstand test and a static internal resistance test, and the detection module 301 can implement the insulation voltage withstand test on the tested battery pack through the positive electrode detection line 303, the negative electrode detection line 304 and the reference ground line 305, and can implement the static internal resistance test on the tested battery pack through the positive electrode detection line 303 and the negative electrode detection line 304.

The charge-discharge testing cabinet 40 has a positive input end 401 and a negative input end 402, the positive input end 401 and the negative input end 402 are respectively connected with the rear positive end 1013 and the rear negative end 1014 of the switch module 101, the control module 102 is used for receiving a switch closing instruction input by an operator through the display module 302, and controlling the switch module 101 to be closed according to the switch closing instruction, and the charge-discharge testing cabinet 40 is used for performing charge-discharge testing on the tested battery pack 50 when the switch module is closed.

Therefore, when the tested battery pack 50 needs to be tested, only the electric connector 20 is connected with the positive electrode and the negative electrode of the tested battery pack 50, then an operator inputs a static test instruction through the display module 302, the detection module 301 can be triggered to realize the static test of the tested battery pack 50, the direct contact between the operator and the positive electrode and the negative electrode of the tested battery pack is avoided in the whole process, so that the potential safety hazard of high-voltage electric shock is eliminated, in addition, after the static test is finished, the operator only needs to input a switch closing instruction through the display module 302, so that the control module 102 controls the switch module 101 to be closed, the charge and discharge test can be rapidly performed, the operation is simple, and the improvement of the detection efficiency is facilitated.

When the charge and discharge test is finished, an operator can input a switch-off command through the display module 302, so that the control module 102 controls the switch module 101 to be turned off according to the switch-off command.

The electrical connector 20 of the embodiment of the present application includes a first interface, a second interface, and a connection wire connected between the first interface and the second interface, where the first interface is connected to the positive electrode and the negative electrode of the battery pack 50 to be tested, and the second interface is connected to the front positive electrode end 1011 and the front negative electrode end 1012 of the switch module 101. The first interface and the second interface may be implemented by various electrical connectors, such as a plug and a socket.

In one specific implementation, the first interface may be, for example, two conductive clips, each having an insulating handle, the two conductive clips respectively clamping the positive and negative poles of the battery pack 50 under test; the second interface may be, for example, a plug, and the control device 10 has a socket port to which the front positive terminal 1011 and the front negative terminal 1012 of the switch module 101 are connected, so that the plug of the electrical connector 20 is inserted into the socket port, that is, the front positive terminal 1011 and the front negative terminal 1012 are connected to the positive and negative electrodes of the battery pack 50 to be tested, respectively.

In the embodiment of the present application, the detection module 301 is further connected to the low-voltage communication interface of the measured battery pack 50 through a first communication line 307, and is configured to obtain the battery parameters of the unit batteries in the measured battery pack 50 through the first communication line 307, and the display module 302 is further configured to display the battery parameters. The battery parameters of the single battery may include a voltage, a temperature, a maximum differential pressure value, and a maximum differential temperature value of the single battery. More specifically, the battery management system may collect parameters such as voltage and temperature of the single battery, and output the parameters through the low-voltage communication interface, and after the detection module 301 receives the voltage and temperature data of the single battery through the first communication line 307, the detection module 301 calculates a maximum voltage difference value and a maximum temperature difference value according to the voltage and temperature of the single battery, so that the detection module 301 obtains the battery parameters of the single battery, and an operator may check the battery parameters of the single battery through the display module 302.

Further, the detection module 301 is further configured to determine whether an abnormal parameter exists in the battery parameters, and if so, the display module 302 is further configured to display a prompt message corresponding to the abnormal parameter. For example, a normal battery parameter range may be stored in the detection module 301 in advance, and the detection module 301 determines whether the obtained battery parameter is within the normal battery parameter range, if so, the obtained battery parameter is normal, and if not, the obtained battery parameter is an abnormal parameter. The display module 302 may add a prompt message to the abnormal parameter, such as highlighting the abnormal parameter, flashing the abnormal parameter, etc., when displaying the battery parameter, so that the operator may be prompted for the abnormal parameter.

In the embodiment of the present application, the battery pack testing system 100 further includes an upper computer 60, the detection module 301 is connected to the upper computer 60 through a second communication line 308, and the detection module 301 is further configured to send the battery parameters to the upper computer 60 through the second communication line 308 for storage, so as to facilitate subsequent reference. If the battery parameter has an abnormal parameter, the detection module 301 may further mark the abnormal parameter, so that the upper computer 60 may identify the abnormal parameter according to the mark, and may perform an abnormal prompt on the abnormal parameter when the battery parameter is displayed.

The detection module 301 is further configured to send the test data of the static test to the display module 302 for display and to the host computer 60 for storage.

Optionally, the charge and discharge testing cabinet 40 further has a positive voltage collecting end 403 and a negative voltage collecting end 404, the positive voltage collecting end 403 and the negative voltage collecting end 404 are respectively connected with the positive input end 401 and the negative input end 402 of the charge and discharge testing cabinet 40, and the charge and discharge testing cabinet 40 is connected with the upper computer 60 through a third communication line 405.

The charge and discharge test cabinet 40 is further configured to collect voltage values of the positive input terminal 401 and the negative input terminal 402 through the positive voltage collection terminal 403 and the negative voltage collection terminal 404, and send the collected voltage values and test data of the charge and discharge test to the upper computer 60 for storage.

The detection module 301 is further configured to obtain a total positive voltage value and a total negative voltage value of the measured battery pack 50, and send the total positive voltage value and the total negative voltage value of the measured battery pack to the host computer 60 for storage. The upper computer 60 is configured to control the charge/discharge test cabinet 40 to perform a charge/discharge test when no abnormal parameter exists in the battery parameters of the unit battery, and the difference ranges between the total positive voltage value and the total negative voltage value of the battery pack 50 to be tested and the voltage values of the positive input terminal and the negative input terminal collected by the charge/discharge test cabinet 40 are within a preset range.

The control module 102 is further configured to obtain the closing state information of the switch module 101, and send the closing state information to the display module 302 for display, so that an operator can clearly know the switching state of the switch module 101.

The test flow of the battery pack test system 100 of the present application is further described below.

First, the positive electrode detection line 303 and the negative electrode detection line 304 of the detection device 30 are connected to the front positive electrode end 1011 and the front negative electrode end 1012 of the switch module 101 in advance, then the positive electrode and the negative electrode of the battery pack 50 to be detected are connected to the front positive electrode end 1011 and the front negative electrode end 1012 through the electrical connector 20, then the reference ground line 305 is connected to the housing grounding member of the battery pack 50 to be detected, and the detection module 301 is connected to the low voltage communication interface of the battery pack 50 to be detected through the first communication line 307. After the wiring is completed, the detection module 301 acquires voltage and temperature information of the single battery output by the low-voltage communication interface, and then calculates a maximum voltage difference value and a maximum temperature difference value according to the voltage and the temperature of the single battery, so that battery parameters of the single battery are obtained, meanwhile, the detection module 301 also judges whether abnormal parameters exist in the battery parameters, if the abnormal parameters exist, the display module 302 also displays prompt information corresponding to the abnormal parameters when displaying the battery parameters of the single battery, and therefore an operator can check the battery parameters and the abnormal parameters in the battery parameters. Meanwhile, the detection module 301 further sends the battery parameters to the upper computer 60 for storage, if there are abnormal parameters in the battery parameters, the detection module 301 may further mark the abnormal parameters, so that the upper computer 60 may identify the abnormal parameters according to the mark.

If abnormal parameters exist, an operator can perform inspection, maintenance, suspension test and the like. If no abnormal parameters exist, an operator can input a static test instruction through the display module 302, so that the detection module 301 performs a static test on the tested battery pack 50 according to the static test instruction, and sends test data of the static test to the display module 302 for display and to the upper computer 60 for storage. The operator can judge whether the abnormality exists in the test data of the static test displayed by the display module 302, and if the abnormality does not exist, the charge and discharge test can be continued.

When the test data of the static test is abnormal, an operator can input a switch closing command through the display module 302, so that the control module 102 controls the switch module 101 to be closed according to the command, and the positive electrode input end 401 and the negative electrode input end 402 of the charge and discharge test cabinet 40 are connected with the positive electrode and the negative electrode of the tested battery pack 50. At this time, the charge and discharge test cabinet 40 collects voltage values of the positive electrode input terminal 401 and the negative electrode input terminal 402 through the positive electrode voltage collection terminal 403 and the negative electrode voltage collection terminal 404, respectively, and transmits the collected voltage values to the upper computer 60, and the detection module 302 obtains a positive electrode total voltage value and a negative electrode total voltage value of the battery pack 50 to be tested, and transmits the positive electrode total voltage value and the negative electrode total voltage value of the battery pack to be tested to the upper computer 60. The upper computer 60 controls the charge and discharge testing cabinet 40 to perform charge and discharge testing when no abnormal parameter exists in the battery parameters of the single battery, and the difference ranges between the total positive voltage value and the total negative voltage value of the battery pack 50 to be tested and the voltage values of the positive input end and the negative input end collected by the charge and discharge testing cabinet 40 are within a preset range, that is, controls the charge and discharge testing cabinet 40 to sequentially perform charge and discharge operations.

If abnormal parameters exist in the battery parameters of the single battery and/or the difference ranges between the total positive voltage value and the total negative voltage value of the battery pack 50 to be tested and the voltage values of the positive input terminal and the negative input terminal collected by the charge and discharge test cabinet 40 are not within the preset range, the charge and discharge test cabinet 40 is not subjected to the charge and discharge test.

In the completion of the charge and discharge test, the charge and discharge test cabinet 40 transmits the test data of the charge and discharge test to the host computer 60 for storage.

By the test system 100, static test and charge and discharge test can be performed on a plurality of battery packs at the same time, so that the test efficiency is further improved. Specifically, referring to fig. 2, in another embodiment of the present application, the battery pack set 60 includes a plurality of battery packs connected in series, and the number of battery packs can be determined according to the upper voltage limit of the charge/discharge test cabinet 40, i.e. the cumulative total voltage of the battery packs does not exceed the upper voltage limit of the charge/discharge test cabinet 40. Taking 3 battery packs as an example, the tested battery pack 50 includes 3 battery packs 501, 502, 503,3 battery packs 501, 502, 503 connected in series, that is, the positive electrode of the battery pack 501 is used as the positive electrode of the tested battery pack 50 and is connected to the front positive electrode 1011 of the switch module 101 through the electric connector 20, the negative electrode of the battery pack 501 is connected with the positive electrode of the battery pack 502, the negative electrode of the battery pack 502 is connected with the positive electrode of the battery pack 503, the negative electrode of the battery pack 503 is used as the negative electrode of the tested battery pack 50, the shell grounding parts of the front negative electrode 1012,3 battery packs 501, 502, 503 connected to the switch module 101 through the electric connector 20 are all connected with the detection module 301 through the reference grounding wire, and the low-voltage communication interfaces of the 3 battery packs 501, 502, 503 are all connected with the detection module 301 through the first communication line 307. After the wiring is completed, static test and charge and discharge test can be performed on the 3 battery packs 501, 502, 503 according to the above test procedure.

Of course, in other embodiments, when there are multiple battery packs in the tested battery pack, the multiple battery packs may be connected in parallel, where the positive electrodes of the multiple battery packs are connected together to be used as the positive electrode of the tested battery pack, and the negative electrodes of the multiple battery packs are connected together to be used as the negative electrode of the tested battery pack.

In addition, in some embodiments of the present application, there may be a plurality of battery packs to be tested, and in this case, the number of the electrical connectors and the switch modules is the same as the number of the battery packs to be tested. The rear positive ends of all the switch modules are connected together and connected with the positive input end, the rear negative ends of all the switch modules are connected together and connected with the negative input end, and the control ends of all the switch modules are connected to the control module. The front positive electrode end and the front negative electrode end of each switch module are respectively connected with the positive electrode and the negative electrode of a tested battery pack group through an electric connector.

The display module may, for example, display keys (which may be touch keys or non-touch keys) corresponding to the switch modules one by one, and the operator inputs a switch closing instruction or a switch opening instruction by operating the keys, for example, when one key is pressed, the control module inputs the switch closing instruction to the corresponding switch module, controls the corresponding switch module to be closed according to the switch closing instruction, and when the key is pressed again, inputs a switch opening instruction to the corresponding switch module, so that the control module controls the corresponding switch module to be opened according to the switch opening instruction. By the mode, the on-off of each switch module can be controlled respectively, so that the corresponding battery pack to be tested is connected with the charging test cabinet. Of course, the display module may also be in a form of displaying an input box, so that an operator inputs a switch closing instruction and a switch opening instruction through the input box, at this time, the identification names of the switch modules may be preconfigured, for example, each switch module is S1 to Sn, and the operator may input a switch closing instruction of "closing S1" in the input box, so that the switch module S1 is closed.

In addition, the number of the positive electrode detection lines, the negative electrode detection lines and the reference ground lines of the detection module is multiple, the detection module is respectively connected with the front positive electrode end and the front negative electrode end of a switch module through one positive electrode detection line and one negative electrode detection line, and the detection module is connected with a shell grounding piece of a battery pack to be detected through one reference ground line. In other words, a set of one positive electrode detection line, one negative electrode detection line, and one reference ground line may be defined as one detection line group, the number of detection line groups being the same as the number of the battery pack groups to be detected, and the detection module being connected to one battery pack group to be detected through one detection line group. The display module can display a plurality of test command keys, and the plurality of test command keys are used for inputting static test commands corresponding to the plurality of battery packs to be tested one by one, for example, when one of the test command keys is pressed, the static test command for carrying out static test on the corresponding battery pack to be tested is input, so that the detection module carries out static test on the corresponding battery pack to be tested according to the static test command.

By the mode, static test and charge and discharge test can be carried out on a plurality of tested battery pack groups.

According to the test system provided by the embodiment of the application, when the tested battery pack is required to be tested, the electric connector is only required to be connected with the positive electrode and the negative electrode of the tested battery pack, then an operator inputs a static test instruction through the display module, the detection module can be triggered to realize the static test of the tested battery pack, the direct contact between the operator and the positive electrode and the negative electrode of the tested battery pack is avoided in the whole process, so that the potential safety hazard of high-voltage electric shock is eliminated, in addition, after the static test is finished, the operator only needs to input a switch closing instruction through the display module, so that the control module controls the switch module to be closed, the charge and discharge test can be rapidly performed, the operation is simple, and the improvement of the detection efficiency is facilitated.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.

Claims

1. A battery pack testing system, comprising:

2. The battery pack testing system according to claim 1, wherein the detection module is further connected to the low-voltage communication interface of the battery pack to be tested through a first communication line, and is configured to obtain the battery parameters of the unit batteries in the battery pack to be tested through the first communication line, and the display module is further configured to display the battery parameters.

3. The battery pack testing system according to claim 2, further comprising an upper computer, wherein the detection module is connected to the upper computer through a second communication line, and the detection module is further configured to send the battery parameters and the test data of the static test to the upper computer for storage through the second communication line.

4. The battery pack testing system according to claim 3, wherein the charge and discharge testing cabinet further has a positive voltage collecting terminal and a negative voltage collecting terminal, the positive voltage collecting terminal and the negative voltage collecting terminal are respectively connected with the positive input terminal and the negative input terminal of the charge and discharge testing cabinet to respectively collect voltage values of the positive input terminal and the negative input terminal, and the charge and discharge testing cabinet is connected with the upper computer through a third communication line.

5. The battery pack testing system according to claim 4, wherein the detection module is further configured to obtain a total positive voltage value and a total negative voltage value of the battery pack to be tested, and send the total positive voltage value and the total negative voltage value of the battery pack to be tested to the host computer for storage.

6. The battery pack testing system of claim 2, wherein the battery parameters include a voltage, a temperature, a maximum differential pressure value, and a maximum differential temperature value of the battery cells.

7. The battery pack testing system of claim 1, wherein the control module is further configured to obtain the closing state information of the switch module, and send the closing state information to the display module for display.

8. The battery pack testing system of claim 1, wherein the battery pack under test comprises one or more battery packs, and when the battery pack under test comprises a plurality of battery packs, the plurality of battery packs are connected in series or in parallel.

9. The battery pack testing system of claim 8, wherein the number of battery packs, electrical connectors and switch modules to be tested is plural, rear positive terminals of all switch modules are connected together and to the positive input terminal, rear negative terminals of all switch modules are connected together and to the negative input terminal, and control terminals of all switch modules are connected to the control module;

10. The battery pack testing system of claim 1, wherein the electrical connector comprises a first interface connected to the positive and negative poles of the battery pack under test, a second interface connected to the front positive and negative poles of the switch module, and a connecting wire connected between the first interface and the second interface.