Battery pack, test equipment and battery pack test method

Abstract

The invention provides a battery pack, test equipment and a battery pack test method. The battery pack comprises at least one battery module and at least one wire harness collection assembly, the at least one wire harness collection assembly is in one-to-one correspondence with the at least one battery module, the detection end of the wire harness collection assembly is connected with the battery module, and the wire harness collection assembly is used for collecting parameters of the battery module, the collection wire harness assembly can be switched between a first connection state and a second connection state, in the first connection state, the output end of the collection wire harness assembly is connected with the BMS module, and in the second connection state, the output end of the collection wire harness assembly is connected with the test equipment. According to the battery pack, multiplexing of the wire harness collecting assembly is achieved, the testing equipment can directly obtain parameter data of the battery module, wire harnesses and collecting points do not need to be rearranged at the position of the battery pack when the battery pack is tested and authenticated, the testing operation of the battery pack is simplified, the workload of testing and authentication of the battery pack is reduced, and the testing efficiency of the battery pack is improved. And the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery pack testing, and in particular to a battery pack, a testing device and a battery pack testing method. Background Art

[0002] Battery pack certification testing involves a series of tests and verifications to ensure the safety, performance, reliability, and compliance of battery packs during use. These tests are an important component of battery pack certification and cover multiple aspects, including safety testing, electrical performance testing, and environmental adaptability testing.

[0003] In the related art, when testing a battery pack, it is necessary to lay wires and set up collection points at the battery pack, which is cumbersome and labor-intensive. Summary of the Invention

[0004] The embodiments of the present application provide a battery pack, a test device, and a battery pack testing method, which can improve the technical problem that when testing the battery pack, wiring and setting up collection points are required at the battery pack, which is cumbersome to operate and has a large workload.

[0005] In a first aspect, an embodiment of the present application provides a battery pack, comprising:

[0006] at least one battery module;

[0007] At least one acquisition harness assembly, wherein at least one acquisition harness assembly corresponds to at least one battery module, a detection end of the acquisition harness assembly is connected to the battery module, and the acquisition harness assembly is used to collect parameters of the battery module;

[0008] The acquisition harness assembly can be switched between a first connection state and a second connection state. In the first connection state, the output end of the acquisition harness assembly is connected to the BMS module. In the second connection state, the output end of the acquisition harness assembly is connected to the test equipment.

[0009] In one embodiment, the output end of the acquisition harness assembly is detachably connected to the BMS module; and / or the output end of the acquisition harness assembly is detachably connected to the test equipment.

[0010] In one embodiment, the collection harness assembly includes a collection harness and a connector, the collection harness electrically connects the connector and the battery module, and the connector is used to electrically connect the BMS module with one of the test devices and the collection harness.

[0011] In one embodiment, the connector includes a connecting plug connected to the collection harness, and the connecting plug is used to connect the collection harness to one of the BMS module and the test equipment.

[0012] In one embodiment, the connector includes an input end, a first output end, and a second output end. The acquisition harness electrically connects the battery module and the input end. The first output end is used to connect to the BMS module, and the second output end is used to connect to the test equipment. In the first connection state, the input end and the first output end are electrically connected, and in the second connection state, the input end and the second output end are electrically connected.

[0013] In one embodiment, the acquisition harness assembly further includes a controller, which is connected to the connector, and is configured to: based on the connection status of the first output end and the second output end, control the on-off of the first output end and the input end, and control the on-off of the second output end and the input end.

[0014] In one embodiment, the battery pack includes a housing, the housing is formed with a mounting cavity, and the battery module is mounted in the mounting cavity, wherein:

[0015] The output end of the collection harness assembly protrudes from the housing; or

[0016] The shell is formed with a through hole communicating with the installation cavity, and the output end of the collection harness assembly is exposed in the through hole.

[0017] In the second aspect, an embodiment of the present application provides a testing device for testing a battery pack, wherein the testing device includes a device body and a switching module, wherein the switching module is connected to the device body, and the switching module is used to connect the device body and the battery pack's acquisition harness assembly, wherein the acquisition harness assembly is used to collect parameters of the battery module of the battery pack, and the acquisition harness assembly can be connected to the BMS module.

[0018] In one embodiment, the adapter module includes an adapter plug and an adapter harness, the adapter harness connects the device body and the adapter plug, and the adapter plug is used to connect to the acquisition harness assembly.

[0019] In one embodiment, the adapter module further includes an adapter plate, an inlet end of the adapter plate is used to connect to the collection harness assembly, and the adapter plug connects an outlet end of the adapter plate and the adapter harness.

[0020] In a third aspect, an embodiment of the present application provides a battery pack testing method, comprising:

[0021] Disconnecting the output end of the acquisition harness assembly from the BMS;

[0022] Connect the output end of the acquisition harness assembly to the test equipment.

[0023] Beneficial effects of the embodiments of the present application:

[0024] In an embodiment of the present application, a data acquisition harness assembly is connected to a battery module so that the data acquisition harness assembly can acquire battery module parameters. Since the output end of the data acquisition harness assembly can be connected to both a BMS module and a test device, the battery module parameters can be transmitted to both the BMS module and the test device via the data acquisition harness assembly. This means that both the BMS module and the test device can obtain battery module parameters via the data acquisition harness assembly, thus achieving data acquisition harness reuse.

[0025] That is to say, since the battery pack needs to transmit the parameters of the battery module to the BMS module through the acquisition harness assembly, the present application realizes the reuse of the acquisition harness assembly by allowing the test equipment and the BMS module to reuse the acquisition harness assembly, so that the test equipment can directly obtain the parameter data of the battery module. Therefore, when testing and certifying the battery pack, there is no need to rearrange the harness and acquisition points at the battery pack, which simplifies the test operation of the battery pack, helps to reduce the workload of battery pack testing and certification, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0028] Figure 2 is a structural diagram of a battery pack and a testing device provided in an embodiment of the present application;

[0029] Figure 3 This is one of the simplified structural diagrams of the battery pack and testing equipment provided in the embodiments of the present application;

[0030] Figure 4 This is the second simplified structural diagram of the battery pack and testing equipment provided in the embodiment of the present application;

[0031] Figure 5 This is a flow chart of a battery pack testing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] 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. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in 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. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0033] The following combination Figures 1 to 5 Describe the battery pack, testing equipment and battery pack testing method of the present application.

[0034] According to the embodiment of the first aspect of the present application, see Figure 1 and Figure 2 The battery pack includes at least one battery module 1 and at least one acquisition harness assembly 2. At least one acquisition harness assembly 2 corresponds one-to-one to at least one battery module 1. The detection end of the acquisition harness assembly 2 is connected to the battery module 1. The acquisition harness assembly 2 is used to collect parameters of the battery module 1.

[0035] The acquisition harness assembly 2 can switch between a first connection state and a second connection state. In the first connection state, the output end of the acquisition harness assembly 2 is connected to the BMS module. In the second connection state, the output end of the acquisition harness assembly 2 is connected to the test equipment 4.

[0036] According to the battery pack of the embodiment of the present application, the acquisition harness assembly 2 is connected to the battery module 1, so that the acquisition harness assembly 2 can collect the parameters of the battery module 1. Since the output end of the acquisition harness assembly 2 can be connected to both the BMS module and the test equipment 4, the parameters of the battery module 1 can be transmitted to the BMS module or to the test equipment 4 through the acquisition harness assembly 2. In other words, both the BMS module and the test equipment 4 can obtain the parameters of the battery module 1 through the acquisition harness assembly 2, thereby realizing the reuse of the acquisition harness 21.

[0037] That is to say, since the battery pack originally needs to transmit the parameters of the battery module 1 to the BMS module through the acquisition harness assembly 2, the present application realizes the reuse of the acquisition harness assembly 2 by allowing the test equipment 4 and the BMS module to reuse the acquisition harness assembly 2, so that the test equipment 4 can directly obtain the parameter data of the battery module 1. Therefore, when testing and certifying the battery pack, there is no need to rearrange the harness and acquisition points at the battery pack, which simplifies the testing operation of the battery pack, helps to reduce the workload of battery pack testing and certification, and reduces costs.

[0038] It is understandable that the data collection scheme for the battery pack is to aggregate the collected wiring harnesses to the BMS module through the wiring harness, and then output from the BMS module. However, the GB / T 36276-2023 "Lithium-ion Batteries for Power Energy Storage" standard requires: During the type approval test, the data output to the external interface of the battery pack through the BMS module and then output to the test equipment 4 will be adjusted by the BMS module, resulting in differences between the battery cell data collected for the test and certification and the actual data of the battery cell, resulting in inaccurate test and certification results. In order to overcome the problem of inaccurate results mentioned above, the relevant technology mainly collects data by rearranging the wiring harness at each battery cell inside the battery pack, but the collection points need to be rearranged, that is, the wiring harness and the battery cell aluminum bar need to be welded, and the collection points generally need to be welded through a specific welding process. It is difficult to ensure the collection quality when rearranging the collection points, and the workload is large. At the same time, the rearranged wiring harness will cause confusion in the wiring harness inside the battery pack, increasing the risk of wiring harness short circuit.

[0039] This application enables the acquisition harness assembly 2 to switch between two states. In the first connection state, the acquisition harness 21 connects the BMS module and the battery module 1, so that the BMS module can obtain the parameters of the battery module 1. In the second connection state, the acquisition harness 21 connects the test equipment 4 and the battery module 1, so that the test equipment 4 can obtain the parameters of the battery module 1. The parameters of the battery module 1 do not pass through the BMS module first, thereby ensuring the accuracy of the parameters of the battery module 1 obtained by the test equipment 4. In other words, this application can meet the requirements of the GB / T 36276-2023 "Lithium-ion Batteries for Power Energy Storage" standard without rearranging the harness and acquisition points, ensuring the accuracy of data acquisition of the battery module 1, avoiding the internal harness confusion of the battery pack, and effectively reducing the time, manpower, material and other costs during battery pack testing and certification.

[0040] In some examples, the parameter of the battery module 1 includes at least one of a temperature parameter and a voltage parameter.

[0041] It should be noted that, when the acquisition harness 21 is in the second connection state, the output end of the acquisition harness 21 may be connected only to the test device 4 , or may be connected to the BMS module and the test device 4 at the same time.

[0042] In some embodiments, the output end of the collection harness 21 assembly is detachably connected to the BMS module.

[0043] It can be understood that the output end of the collection harness 21 component is detachably connected to the BMS module, which improves the connection convenience between the output end of the collection harness 21 component and the BMS module, making it easier for the collection harness 21 component to switch between the first connection state and the second connection state.

[0044] When the battery pack is not being tested and certified, the output end of the acquisition harness 21 assembly is connected to the BMS module so that the acquisition harness 21 assembly can transmit the parameters of the battery module 1 to the BMS module. When the battery pack is being tested and certified, the output end of the acquisition harness 21 assembly can be separated from the BMS module so that the output end of the acquisition harness 21 assembly can be connected to the test equipment 4 to directly transmit the parameters of the battery module 1 to the test equipment 4, thereby reusing the acquisition harness 21 assembly and meeting the requirements of the GB / T 36276-2023 "Lithium-ion Batteries for Power Energy Storage" standard. There is no need to rearrange the harness and acquisition points, ensuring the accuracy of data collection from the battery module 1, avoiding internal harness confusion in the battery pack, and effectively reducing the time, manpower, material and other costs during battery pack testing and certification.

[0045] In some examples, the output end of the collection harness 21 assembly is detachably connected to the BMS module, for example, by snapping, magnetism, or any other suitable means.

[0046] In some embodiments, the output end of the collection harness 21 assembly is detachably connected to the test equipment 4 .

[0047] It can be understood that the output end of the collection harness 21 component is detachably connected to the test equipment 4, which improves the connection convenience between the output end of the collection harness 21 component and the test equipment 4, and facilitates the switching of the collection harness 21 component between the first connection state and the second connection state.

[0048] When the battery pack is not being tested and certified, the output end of the acquisition harness 21 assembly is connected to the BMS module so that the acquisition harness 21 assembly can transmit the parameters of the battery module 1 to the BMS module. When the battery pack is being tested and certified, the output end of the acquisition harness 21 assembly can be separated from the BMS module so that the output end of the acquisition harness 21 assembly can be connected to the test equipment 4 to directly transmit the parameters of the battery module 1 to the test equipment 4, thereby reusing the acquisition harness 21 assembly and meeting the requirements of the GB / T 36276-2023 "Lithium-ion Batteries for Power Energy Storage" standard. There is no need to rearrange the harness and acquisition points, ensuring the accuracy of data collection from the battery module 1, avoiding internal harness confusion in the battery pack, and effectively reducing the time, manpower, material and other costs during battery pack testing and certification.

[0049] In some examples, the output end of the collection harness 21 assembly is detachably connected to the test device 4 by, for example, snap-on connection, magnetic attraction, or any other suitable means.

[0050] In some embodiments, see Figure 3 and Figure 4 The collection harness assembly 2 includes a collection harness 21 and a connector 22 . The collection harness 21 electrically connects the battery module 1 and the connector 22 . The connector 22 is used to electrically connect the BMS module and one of the test equipment 4 and the collection harness 21 .

[0051] It can be understood that the first end of the acquisition harness 21 is connected to the battery module 1 to obtain parameter information of the battery module 1, and the second end of the acquisition harness 21 is connected to the connector 22, and the connector 22 can be connected to one of the BMS module and the test equipment 4, and then the BMS module and one of the test equipment 4 can be electrically connected to the acquisition harness 21 through the connector 22, so that the acquisition harness assembly 2 can switch between the first connection state and the second connection state.

[0052] It is understandable that if the acquisition harness 21 is directly connected to the BMS module or test equipment 4, it is necessary to connect the acquisition harness 21 and the BMS module or test equipment 4 together through welding or other methods, which is more troublesome and also more troublesome to disassemble, thereby increasing the difficulty of switching the acquisition harness assembly 2 between the first connection state and the second connection state. In the present application, the acquisition harness 21 is first connected to the connector 22, and then the acquisition harness 21 is connected to the BMS module or test equipment 4 through the connector 22, which is conducive to improving the connection convenience of the acquisition harness 21 and the BMS module or test equipment 4.

[0053] In some embodiments, see Figure 3 and Figure 4The connector 22 includes a connecting plug 221 , which is connected to the data acquisition harness 21 . The connecting plug 221 is used to connect the BMS module, one of the test equipment 4 , and the data acquisition harness 21 .

[0054] It can be understood that the first end of the acquisition harness 21 is connected to the battery module 1 to obtain parameter information of the battery module 1, and the second end of the acquisition harness 21 is connected to the connection plug 221, and the connection plug 221 can be connected to one of the BMS module and the test equipment 4, so that the acquisition harness 21 can be connected to one of the BMS module and the test equipment 4, so that the acquisition harness 21 can transmit the parameters of the battery module 1 to one of the BMS module and the test equipment 4.

[0055] That is to say, when the battery pack test and certification is not performed, the acquisition harness 21 and the BMS module are connected together using the connecting plug 221, so that the acquisition harness 21 can transmit the parameters of the battery module 1 to the BMS module. When the battery pack test and certification is required, the acquisition harness 21 and the BMS module can be separated, and the acquisition harness 21 and the test equipment 4 can be connected using the connecting plug 221 to directly transmit the parameters of the battery module 1 to the test equipment 4, thereby realizing the reuse of the acquisition harness 21, and thus meeting the standard requirements of GB / T36276-2023 "Lithium-ion Batteries for Electric Energy Storage", without the need to rearrange the harness and collection points, thereby ensuring the accuracy of data collection of the battery module 1, avoiding the internal harness confusion of the battery pack, and effectively reducing the time, manpower, material and other costs during battery pack testing and certification.

[0056] In some embodiments, the connector 22 includes an input end, a first output end, and a second output end. The acquisition harness 21 electrically connects the battery module 1 and the input end. The first output end is used to connect to the BMS module, and the second output end is used to connect to the test equipment 4. In the first connection state, the input end and the first output end are electrically connected, and in the second connection state, the input end and the second output end are electrically connected.

[0057] It is understood that when the battery pack is not being tested and certified, the acquisition harness assembly 2 is in a first connection state, in which the input and first output ends of the connector 22 are electrically connected, i.e., the connector 22 can electrically connect the BMS module and the acquisition harness 21, allowing the acquisition harness 21 to transmit the parameter data of the battery module 1 to the BMS module. When the battery pack is to be tested and certified, the acquisition harness 21 is in a second connection state, in which the input and second output ends of the connector 22 are electrically connected, i.e., the connector 22 can connect the test equipment 4 and the acquisition harness 21, allowing the acquisition harness 21 to directly transmit the parameter data of the battery module 1 to the test equipment 4, thereby reusing the acquisition harness 21. This can meet the requirements of the GB / T36276-2023 "Lithium-ion Batteries for Power Energy Storage" standard without rearranging the harness and acquisition points, ensuring the accuracy of data collection from the battery module 1, avoiding internal harness clutter in the battery pack, and effectively reducing the time, manpower, and material costs associated with battery pack testing and certification.

[0058] In some examples, when the battery pack test and certification is not being performed, the input terminal and the second output terminal of the connector 22 may be disconnected.

[0059] In some examples, when battery pack testing and certification is required, the input end and the first output end of the connector 22 may be disconnected.

[0060] In some embodiments, the acquisition harness assembly 2 further includes a controller, which is connected to the connector 22 and is configured to: control the on / off of the first output end and the input end, and control the on / off of the second output end and the input end based on the connection status of the first output end and the second output end.

[0061] It is understood that when it is determined that the first output terminal is connected to a BMS module, the controller controls the connection between the first output terminal and the input terminal, thereby connecting the BMS module to the acquisition harness 21, thereby enabling the parameter data of the battery module 1 to be transmitted to the BMS module. When it is determined that the second output terminal is connected to the test equipment 4, the controller controls the connection between the second output terminal and the input terminal, thereby connecting the test equipment 4 to the acquisition harness 21, thereby enabling the parameter data of the battery module 1 to be directly transmitted to the test equipment 4. In other words, this embodiment utilizes the controller to control the on / off state of the connector 22 based on the connection status of the first and second output terminals, thereby improving the intelligence of the acquisition harness assembly 2.

[0062] In some examples, presence detection circuits are provided at both the first output terminal and the second output terminal, thereby detecting whether the BMS module is connected to the first output terminal and whether the test device 4 is connected to the second output terminal.

[0063] In some embodiments, see Figure 1 and Figure 2The battery pack includes a shell 5 , which is formed with a mounting cavity 51 , and the battery module 1 is mounted in the mounting cavity 51 .

[0064] Specifically, the output end of the collection harness assembly 2 protrudes from the housing 5 .

[0065] It can be understood that designing the output end of the acquisition harness assembly 2 to protrude from the housing 5 facilitates the connection between the test equipment 4 and the output end of the acquisition harness assembly 2, thereby improving the convenience of battery pack testing.

[0066] Specifically, the housing 5 is formed with a through hole communicating with the installation cavity 51 , and the output end of the collection harness assembly 2 is exposed in the through hole.

[0067] It can be understood that the output end of the collection harness assembly 2 is exposed at the through hole, and the test equipment 4 can be connected to the output end of the collection harness assembly 2 through the through hole, which facilitates the connection between the test equipment 4 and the output end of the collection harness assembly 2 and improves the convenience of battery pack testing.

[0068] According to the embodiment of the second aspect of the present application, see Figure 3 and Figure 4 The test equipment 4 is used to test the battery pack. The test equipment 4 includes a device body 41 and a switching module 42. The switching module 42 is connected to the device body 41. The switching module 42 is used to connect the device body 41 and the acquisition harness assembly 2 of the battery pack, wherein the acquisition harness assembly 2 is used to collect parameters of the battery module 1 of the battery pack, and the acquisition harness assembly 2 can be connected to the BMS module.

[0069] According to the test device 4 of the embodiment of the present application, the device body 41 and the acquisition harness assembly 2 can be connected together through the adapter module 42, so that the parameters of the battery module 1 can be directly transmitted to the device body 41 through the acquisition harness assembly 2. The acquisition harness assembly 2 can also be connected to the BMS module to transmit the parameter data of the battery module 1 to the BMS module. In other words, the present application enables the test device 4 and the BMS module to reuse the acquisition harness assembly 2, realizes the reuse of the acquisition harness assembly 2, and enables the test device 4 to directly obtain the parameter data of the battery module 1. Then, when the battery pack is tested and certified, there is no need to rearrange the harness and acquisition points at the battery pack, which simplifies the test operation of the battery pack, helps to reduce the workload of battery pack testing and certification, and reduces costs.

[0070] In some embodiments, see Figure 3 and Figure 4 The adapter module 42 includes an adapter plug 421 and an adapter harness 422 . The adapter harness 422 connects the device body 41 and the adapter plug 421 . The adapter plug 421 is used to connect to the acquisition harness assembly 2 .

[0071] It can be understood that the device body 41 and the adapter plug 421 are connected together using a connecting harness. When the battery pack needs to be tested and certified, the adapter plug 421 is connected to the acquisition harness assembly 2, so that the adapter plug 421 can connect the device body 41 and the connecting harness, and the parameter data of the battery module 1 can be directly transmitted to the device body 41.

[0072] In some embodiments, see Figure 3 and Figure 4 The adapter module 42 also includes an adapter plate 423 , the inlet end of the adapter plate 423 is used to connect to the collection harness assembly 2 , and the adapter plug 421 connects the outlet end of the adapter plate 423 and the adapter harness 422 .

[0073] It can be understood that the outlet end of the adapter plate 423, the adapter plug 421, the adapter harness 422 and the device body 41 are connected in sequence. When the battery pack needs to be tested and certified, the inlet end of the adapter plate 423 and the acquisition harness assembly 2 are connected, so that the parameter data of the battery module 1 can be directly transmitted to the device body 41.

[0074] It is understood that the adapter plate 423 has multiple inlet and outlet ports, that is, the adapter plate 423 can be connected to multiple adapter plugs 421 at the same time, and the adapter plate 423 can be connected to multiple data collection harness assemblies 2 at the same time. In other words, by providing the adapter plate 423, the parameter data of multiple battery modules 1 can be transmitted to the device body 41 at the same time, thereby improving efficiency.

[0075] According to the embodiment of the third aspect of the present application, see Figure 5 , battery pack test methods, including:

[0076] Step 101: disconnect the output end of the data acquisition harness assembly 2 from the BMS;

[0077] Step 102 : Connect the output end of the acquisition harness assembly 2 to the test equipment 4 .

[0078] According to the battery pack testing method of the embodiment of the present application, when the battery pack test and certification is not being performed, the output end of the acquisition harness 21 is connected to the BMS module so that the acquisition harness 21 can transmit the parameters of the battery module 1 to the BMS module. When the battery pack test and certification is required, the output end of the acquisition harness 21 is disconnected from the BMS module and connected to the test equipment 4 to directly transmit the parameters of the battery module 1 to the test equipment 4, thereby reusing the acquisition harness 21. This can meet the requirements of the GB / T 36276-2023 "Lithium-ion Batteries for Power Energy Storage" standard without rearranging the harness and collection points, ensuring the accuracy of data collection from the battery module 1, avoiding internal harness confusion in the battery pack, and effectively reducing the time, manpower, and material costs associated with battery pack test and certification.

[0079] In some embodiments, before the step of connecting the output end of the acquisition harness assembly 2 to the test equipment 4, the battery pack testing method further includes:

[0080] Lead the output end of the collection harness assembly 2 out of the battery pack.

[0081] It can be understood that the output end of the acquisition harness assembly 2 is led out of the battery pack so that the test equipment 4 can be connected to the output end of the acquisition harness assembly 2 outside the battery pack, thereby facilitating the connection between the test equipment 4 and the output end of the acquisition harness assembly 2.

[0082] In some embodiments, before the step of disconnecting the output end of the acquisition harness assembly 2 from the BMS: the battery cells are stacked, fixed with end plates and steel strips, and assembled into a battery module 1, each module is welded to the battery poles through an aluminum busbar to weld the adjacent battery cells to achieve series connection of the battery cells, and the adjacent modules are connected through copper busbars to achieve series connection of all battery cells of the four modules; the temperature acquisition harness 21 and the voltage acquisition harness 21 are arranged on the battery cell aluminum busbar to form a communication loop, and the battery cell temperature and voltage data collected by each module are integrated and output through the connector terminals, for example, four modules correspond to four output terminals; the module output terminals are respectively inserted into the BMS to achieve data aggregation, and then the BMS outputs the data to the external port of the battery pack; multiple battery modules 1 are packaged to form a complete battery pack structure.

[0083] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack, characterized in that: include: at least one battery module; At least one acquisition harness assembly, wherein at least one acquisition harness assembly corresponds to at least one battery module, a detection end of the acquisition harness assembly is connected to the battery module, and the acquisition harness assembly is used to collect parameters of the battery module; The acquisition harness assembly can be switched between a first connection state and a second connection state. In the first connection state, the output end of the acquisition harness assembly is connected to the BMS module. In the second connection state, the output end of the acquisition harness assembly is connected to the test equipment.

2. The battery pack according to claim 1, wherein: The output end of the acquisition harness assembly is detachably connected to the BMS module; and / or the output end of the acquisition harness assembly is detachably connected to the test equipment.

3. The battery pack according to claim 1 or 2, characterized in that: The collection harness assembly includes a collection harness and a connector. The collection harness electrically connects the connector and the battery module. The connector is used to electrically connect the BMS module, one of the test equipment, and the collection harness.

4. The battery pack according to claim 3, wherein: The connector includes a connecting plug connected to the collection harness, and the connecting plug is used to connect the BMS module, one of the test equipment, and the collection harness.

5. The battery pack according to claim 3, wherein: The connector includes an input end, a first output end, and a second output end. The acquisition harness is electrically connected to the battery module and the input end. The first output end is used to connect to the BMS module, and the second output end is used to connect to the test equipment. In the first connection state, the input end and the first output end are electrically connected, and in the second connection state, the input end and the second output end are electrically connected.

6. The battery pack according to claim 5, characterized in that: The acquisition harness assembly also includes a controller, which is connected to the connector and configured to control the on / off switching of the first output end and the input end, and control the on / off switching of the second output end and the input end based on the connection status of the first output end and the second output end.

7. The battery pack according to claim 1 or 2, characterized in that: The battery pack includes a housing, the housing is formed with a mounting cavity, and the battery module is mounted in the mounting cavity, wherein: The output end of the collection harness assembly protrudes from the housing; or The shell is formed with a through hole communicating with the installation cavity, and the output end of the collection harness assembly is exposed in the through hole.

8. A testing device for testing a battery pack, characterized in that: The testing device includes a device body and a switching module, the switching module is connected to the device body, and the switching module is used to connect the device body and the acquisition harness assembly of the battery pack, wherein the acquisition harness assembly is used to collect parameters of the battery module of the battery pack, and the acquisition harness assembly can be connected to the BMS module.

9. The testing device according to claim 8, characterized in that The adapter module includes an adapter plug and an adapter harness, the adapter harness connects the device body and the adapter plug, and the adapter plug is used to connect to the acquisition harness assembly.

10. The testing device according to claim 9, characterized in that The adapter module further includes an adapter plate, an inlet end of the adapter plate is used to connect to the collection harness assembly, and the adapter plug is connected to the outlet end of the adapter plate and the adapter harness.

11. A battery pack testing method based on the battery pack according to any one of claims 1 to 7, characterized in that: include: Disconnecting the output end of the acquisition harness assembly from the BMS; Connect the output end of the acquisition harness assembly to the test equipment.

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