Battery testing device and battery testing equipment

Abstract

The utility model discloses a battery testing device and battery testing equipment, the battery testing device comprises a first charging and discharging module, a second charging and discharging module and a connecting assembly, and the first charging and discharging module is provided with a first output end and a second output end; the second charging and discharging module is provided with a third output end and a fourth output end, and the output current of the first charging and discharging module is smaller than that of the second charging and discharging module; the connecting assembly comprises a positive terminal, a negative terminal and a reference electrode terminal, the first output end is used for being electrically connected with the positive terminal and the negative terminal, the second output end is used for being electrically connected with the reference electrode terminal, the third output end is used for being electrically connected with the positive terminal, and the fourth output end is used for being electrically connected with the negative terminal. The battery testing device provided by the embodiment of the utility model can improve the testing efficiency and reliability.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] The development of battery technology must take into account many design factors at the same time. For example, how to improve the test efficiency and reliability of battery cell charge and discharge tests is an important research direction in the battery field. Utility Model Content

[0004] The present application provides a battery testing device and a battery testing equipment, which can improve the testing efficiency and reliability during the testing process.

[0005] In the first aspect, the present application provides a battery testing device, including a first charge and discharge module, a second charge and discharge module and a connecting component, the first charge and discharge module is provided with a first output terminal and a second output terminal; the second charge and discharge module is provided with a third output terminal and a fourth output terminal, the output current of the first charge and discharge module is less than the output current of the second charge and discharge module; the connecting component includes a positive terminal, a negative terminal and a reference electrode terminal; wherein the first output terminal is used to be electrically connected to the positive terminal and the negative terminal, the second output terminal is used to be electrically connected to the reference electrode terminal, the third output terminal is used to be electrically connected to the positive terminal, and the fourth output terminal is used to be electrically connected to the negative terminal.

[0006] In the technical solution of the embodiment of the present application, a first and a second charging and discharging module are integrated in the battery testing device, and the output currents of the two charging and discharging modules are different. On this basis, the first charging and discharging module and the second charging and discharging module respectively have two output terminals, which are respectively used to connect to multiple terminals in the connecting component, so that the terminals at the connecting component can be connected to the two charging and discharging modules respectively, and then the modules required for testing and lithium replenishment are integrated in the same device, and the switching between the testing function and the lithium replenishment function is conveniently realized without disassembling the battery under test, thereby improving the test efficiency and reducing the possibility of damage to the battery under test due to assembly and disassembly.

[0007] According to some embodiments of the present application, the battery testing device includes multiple connection components, and the second charge and discharge module is provided with multiple third output terminals and multiple fourth output terminals, and the multiple third output terminals and the multiple fourth output terminals are respectively used to be electrically connected to multiple positive terminals and multiple negative terminals. The second charge and discharge module is provided with multiple output channels, so that multiple batteries can be tested simultaneously.

[0008] According to some embodiments of the present application, the number of the third output terminals and the number of the fourth output terminals are greater than the number of the first output terminals and the number of the second output terminals. The first charge and discharge module for replenishing lithium, which takes a shorter time, is set to have fewer output terminals, so as to improve efficiency and reduce costs by rotating use.

[0009] According to some embodiments of the present application, the first charge and discharge module includes a first output terminal and a second output terminal, the first output terminal is used to be electrically connected to a plurality of positive terminals and a plurality of negative terminals, respectively, and the second output terminal is used to be electrically connected to a plurality of reference electrode terminals. The number of lithium replenishment channels is further reduced, thereby reducing the size of the device and reducing costs.

[0010] According to some embodiments of the present application, the third output terminal and the fourth output terminal are respectively arranged in one-to-one correspondence with the positive terminal and the negative terminal, thereby improving the accuracy of applying electrical signals to the battery under test and reducing the possibility of mutual interference between different tested devices.

[0011] According to some embodiments of the present application, the battery testing device further includes a plurality of switch units, including a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, and a fifth switch unit; the first switch unit is used to control the on-off between the first output terminal and the positive terminal, the second switch unit is used to control the on-off between the first output terminal and the negative terminal, the third switch unit is used to control the on-off between the second output terminal and the reference electrode terminal, the fourth switch unit is used to control the on-off between the third output terminal and the positive terminal, and the fifth switch unit is used to control the on-off between the fourth output terminal and the negative terminal. A switch unit is provided in each passage between the first and second charge and discharge modules and the connection assembly to improve the flexibility of control.

[0012] According to some embodiments of the present application, the battery testing device further includes a control module, which is respectively connected to the plurality of switch units for communication. The plurality of switch units are controlled by the same control module, so that the testing device is easy to operate.

[0013] According to some embodiments of the present application, the control module is configured to control the connection component to switch between the test state and the lithium plating state. In the test state, the first switch unit, the second switch unit, and the third switch unit are disconnected, and the fourth switch unit and the fifth switch unit are turned on; in the lithium plating state, the first switch unit, one of the second switch unit, and the third switch unit are turned on, and the fourth switch unit and the fifth switch unit are turned off. In the two states, the connection component is respectively connected to different charging and discharging machines to achieve convenient switching.

[0014] According to some embodiments of the present application, the battery testing device further includes a voltage monitoring component, which is electrically connected to the reference electrode terminal in the test state and is used to monitor the voltage of the reference electrode terminal. The accuracy of the test is improved by real-time monitoring of the voltage of the reference electrode that is not connected to the charging and discharging machine during the test.

[0015] According to some embodiments of the present application, the control module is configured to: control at least part of the plurality of fourth switch units respectively connected to the plurality of connection components and at least part of the plurality of fifth switch units to be turned on simultaneously, and control the number of the plurality of first switch units respectively connected to the plurality of connection components and the plurality of second switch units to be turned on simultaneously to be less than or equal to one. This enables the test device to be applied to a plurality of batteries at the same time, further improving the test efficiency.

[0016] According to some embodiments of the present application, the battery testing device further includes a housing, the housing encloses a housing cavity, the first charging and discharging module and the second charging and discharging module are arranged in the housing cavity, and the positive terminal, the negative terminal and the reference electrode terminal at least partially extend outside the housing cavity. The two charging and discharging modules can be integrated in the same housing to improve protection performance and space utilization.

[0017] In a second aspect, the present application provides a battery testing device, comprising the battery testing device, a supporting member and a control device in any embodiment of the first aspect, wherein the battery testing device comprises a control module; a supporting frame, which is arranged adjacent to the battery testing device, and the supporting frame is used to support the battery cell to be tested; and a control device, which is communicatively connected to the control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0019] Figure 1 A schematic diagram of the structure of a battery testing device provided in some embodiments of the present application.

[0020] Reference numerals:

[0021] 100-Battery testing device;

[0022] 10-first charge and discharge module; 20-second charge and discharge module; 30-connection assembly; 40-switch unit; 50-control module; 60-housing;

[0023] 11-first output terminal; 12-second output terminal; 21-third output terminal; 22-fourth output terminal; 31-positive terminal; 32-negative terminal; 33-reference electrode terminal; 41-first switch unit; 42-second switch unit; 43-third switch unit; 44-fourth switch unit; 45-fifth switch unit. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] During the battery design and processing, it is often necessary to test battery cells or battery devices, including charging and discharging tests on battery cells. During the test, the positive and negative electrodes of the battery will lose lithium, and then they need to be plated with lithium using a small current at the microampere level before continuing the test.

[0033] However, in the actual test process, the current required for testing is different from the current required for lithium plating, so two different charging and discharging machines are usually required, and the distance between the two devices is far. When plating lithium, it is usually necessary to remove the battery under test, transport it to another device, and then connect the battery under test. After the lithium plating is completed, the above operation needs to be repeated, resulting in low test efficiency and easy damage during the assembly and disassembly process.

[0034] In view of this, an embodiment of the present application provides a technical solution, which can save the time required for transportation and assembly and disassembly by integrating charging and discharging modules with different output currents, thereby improving test efficiency and reducing the possibility of damage.

[0035] It is understandable that, for the sake of simplicity, the embodiments of the present application only use the device to test battery cells as an example, but it should be understood that the present application is not limited to this and can also be applied to other occasions that require multiple different electrical signals to act on the same component and provide protection for it.

[0036] Next, combine with Figure 1 The structure of the battery testing equipment is described.

[0037] See also Figure 1 , Figure 1 A schematic diagram of the structure of a battery testing device provided in some embodiments of the present application.

[0038] In the first aspect, the present application provides a battery testing device 100, including a first charge and discharge module 10, a second charge and discharge module 20 and a connecting component 30, the first charge and discharge module 10 is provided with a first output terminal 11 and a second output terminal 12; the second charge and discharge module 20 is provided with a third output terminal 21 and a fourth output terminal 22, the output current of the first charge and discharge module 10 is less than the output current of the second charge and discharge module 20; the connecting component 30 includes a positive terminal 31, a negative terminal 32 and a reference electrode terminal 33; wherein the first output terminal 11 is used to be electrically connected to the positive terminal 31 and the negative terminal 32, the second output terminal 12 is used to be electrically connected to the reference electrode terminal 33, the third output terminal 21 is used to be electrically connected to the positive terminal 31, and the fourth output terminal 22 is used to be electrically connected to the negative terminal 32.

[0039] The present application provides a battery testing device 100 for testing a battery, which includes a first charging and discharging module 10 and a second charging and discharging module 20, and the two charging and discharging modules are used to provide an electrical signal of a preset magnitude to the battery under test, so as to realize the functions of charging and discharging testing and lithium plating on the positive electrode sheet and / or the negative electrode sheet in the battery.

[0040] According to the difference between the electrical signal required for the test and the electrical signal required for lithium plating, the output current of the first charge and discharge module 10 for lithium plating can be less than the output current of the second charge and discharge module 20 for testing. Exemplarily, the output signal of the first charge and discharge module 10 can be selected as an electrical signal of 5V and 1mA, and the output signal of the second charge and discharge module 20 can be selected as an electrical signal of 5V and 6A.

[0041] The connection assembly 30 includes a plurality of terminals, which are used to connect to the battery under test. Therefore, the terminals can adopt a structure that is convenient for connection, such as a conductive spring clip, a plug-in terminal, etc. The connection assembly 30 includes three terminals, namely a positive terminal 31, a negative terminal 32, and a reference electrode terminal 33, which can be used to electrically connect to the positive electrode, the negative electrode, and the reference electrode of the battery, respectively.

[0042] Furthermore, the first charge and discharge module 10 includes two output terminals, namely a first output terminal 11 and a second output terminal 12 , and the second charge and discharge module 20 includes two output terminals, namely a third output terminal 21 and a fourth output terminal 22 .

[0043] The first output terminal 11 is used to be connected to the positive terminal 31 and the negative terminal 32 in the connection assembly 30, respectively, and the second output terminal 12 is used to be connected to the reference electrode terminal 33. When the first charge and discharge module 10 is connected to the connection terminal, it can provide a lithium plating function to the battery under test connected to the connection assembly 30.

[0044] The third output terminal 21 and the fourth output terminal 22 are respectively used to connect to the positive terminal 31 and the negative terminal 32. When the second charge and discharge module 20 is connected to the connection terminal, the battery under test connected to the connection component 30 can be tested. The electrical connection between the two charge and discharge modules and the connection component 30 can be switched by a switch.

[0045] It can be understood that the above connection refers to direct or indirect electrical connection. A switch unit 40, a relay, an overload protection element and other elements may be arranged between each output end and each terminal. The present application does not make any specific limitation on this, and it is only necessary to be able to achieve electrical connection between the output end and the corresponding terminal.

[0046] By electrically connecting two charging and discharging modules with different output signals to the same connection assembly 30, the connection assembly 30 can provide different output signals to the battery under test to achieve different functions. In this way, the battery under test can be tested and lithium replenished without the need to transport, install or disassemble the battery under test, thereby effectively improving the test efficiency and reducing the possibility of damaging the battery under test when disassembling or connecting it.

[0047] In the technical solution of the embodiment of the present application, a first and a second charging and discharging module are integrated in the battery testing device, and the output currents of the two charging and discharging modules are different. On this basis, the first charging and discharging module 10 and the second charging and discharging module 20 respectively have two output ends, which are respectively used to connect to multiple terminals in the connecting component 30, so that the terminals at the connecting component 30 can be connected to the two charging and discharging modules respectively, and then the modules required for testing and lithium replenishment are integrated in the same device, without disassembling the battery under test, and conveniently switching between the test function and the lithium replenishment function is realized, thereby improving the test efficiency and reducing the possibility of damage to the battery under test due to assembly and disassembly.

[0048] In some optional embodiments, the battery testing device 100 includes multiple connecting components 30, and the second charge and discharge module 20 is provided with multiple third output terminals 21 and multiple fourth output terminals 22, and the multiple third output terminals 21 and the multiple fourth output terminals 22 are respectively used to be electrically connected to multiple positive terminals 31 and multiple negative terminals 32.

[0049] The battery testing device 100 may include a plurality of connection components 30, which are respectively used to connect to a plurality of batteries under test, and each connection component 30 includes a positive terminal 31, a negative terminal 32, and a reference electrode terminal 33. Correspondingly, the second charge and discharge module 20 may be provided with a plurality of pairs of output terminals, that is, a plurality of third output terminals 21 may be respectively connected to the positive terminals 31 in a plurality of connection components 30, and a plurality of fourth output terminals 22 may be respectively connected to the negative terminals 32 in a plurality of connection components 30, so as to form a plurality of test channels.

[0050] Optionally, the number of the third output terminals 21 and the fourth output terminals 22 may be the same as or smaller than the number of the connection components 30 .

[0051] By providing the second charge and discharge module 20 with a plurality of output channels, a plurality of batteries can be tested simultaneously, and the electrical signals applied to each tested battery can be independently regulated, which has high flexibility.

[0052] In some optional embodiments, the number of the third output terminals 21 and the number of the fourth output terminals 22 are greater than the number of the first output terminals 11 and the number of the second output terminals 12 .

[0053] During the use of the battery testing device 100, the time required for testing is usually longer than the time required for lithium plating. On this basis, the number of the third output terminal 21 and the fourth output terminal 22 can be made greater than the number of the first output terminal 11 and the second output terminal 12, that is, more test channels and fewer lithium plating channels are formed. These lithium plating channels can be selected for rotation among the various connecting components 30, and the rotation is achieved by utilizing the difference between the test duration and the lithium plating duration.

[0054] By setting the first charge and discharge module 10 for replenishing lithium in a shorter time to have fewer output terminals, efficiency can be improved through rotation use, and setting fewer output terminals can effectively reduce the cost of the battery testing device 100.

[0055] In some optional embodiments, the first charge and discharge module 10 includes a first output terminal 11 and a second output terminal 12, the first output terminal 11 is used to be electrically connected to multiple positive terminals 31 and multiple negative terminals 32 respectively, and the second output terminal 12 is used to be electrically connected to multiple reference electrode terminals 33.

[0056] Based on the aforementioned small number of first and second output terminals, the number of output terminals of the first charge and discharge module 10 can be further reduced to a pair, wherein the first output terminal 11 is respectively connected to each positive terminal 31 and negative terminal 32 in a plurality of connection components 30 through wiring, and the second output terminal 12 is respectively connected to each reference electrode terminal 33 in a plurality of connection components 30 through wiring.

[0057] By further reducing the number of lithium replenishment channels, the volume of the battery testing device 100 can be further reduced and its cost can be reduced.

[0058] In some optional embodiments, the third output terminal 21 and the fourth output terminal 22 are respectively arranged in a one-to-one correspondence with the positive terminal 31 and the negative terminal 32 .

[0059] In an embodiment in which the battery testing device 100 includes a plurality of connection components 30, and the second charge and discharge module 20 is provided with a plurality of third output terminals 21 and a plurality of fourth output terminals 22, the number of the third output terminals 21 and the fourth output terminals 22 can be set according to the number of the connection components 30, so that the third output terminals 21 are connected one-to-one with the positive terminals 31 in each connection component 30, and the fourth output terminals 22 are connected one-to-one with the negative terminals 32 in each connection component 30.

[0060] It can be understood that the one-to-one connection here refers to a direct or indirect connection, and a switch unit 40 or other required connecting parts may be provided between the output end and the terminal in the connecting component 30 .

[0061] By arranging the multiple output terminals of the second charge and discharge module 20 in one-to-one correspondence with the connection assembly 30, the accuracy of applying the electrical signal to the battery under test through the connection assembly 30 during the test can be improved, and the possibility of mutual interference between different tested devices can be reduced.

[0062] In some optional embodiments, the battery testing device 100 also includes multiple switch units 40, the switch units 40 include a first switch unit 41, a second switch unit 42, a third switch unit 43, a fourth switch unit 44 and a fifth switch unit 45; the first switch unit 41 is used to control the on-off between the first output terminal 11 and the positive terminal 31, the second switch unit 42 is used to control the on-off between the first output terminal 11 and the negative terminal 32, the third switch unit 43 is used to control the on-off between the second output terminal 12 and the reference electrode terminal 33, the fourth switch unit 44 is used to control the on-off between the third output terminal 21 and the positive terminal 31, and the fifth switch unit 45 is used to control the on-off between the fourth output terminal 22 and the negative terminal 32.

[0063] To achieve the preset electrical connection function, the battery testing device 100 may also include a plurality of switch units 40, which are respectively arranged corresponding to the circuits between the output end and each terminal in the connecting component 30, that is, connected in series between a certain output end and a certain terminal of the connecting component 30.

[0064] Specifically, the switch unit 40 includes a plurality of independent switch units 40, wherein the switch unit 41 is connected between the first output terminal 11 and each positive terminal 31, the switch unit 42 is connected between the first output terminal 11 and each negative terminal 32, and the switch unit 43 is connected between the second output terminal 12 and the reference electrode terminal 33. The first to third switch units 43 are used to control the connection and disconnection between the connection component 30 and the first charge and discharge module 10, and can perform lithium plating on the battery under test connected to the connection component 30 after being turned on.

[0065] Correspondingly, the fourth switch unit 44 is set to connect between each third output terminal 21 and each positive terminal 31, and the fifth switch unit 45 is set to connect between each fourth output terminal 22 and each negative terminal 32. The fourth and fifth switch units are used to control the connection and disconnection between the connection component 30 and the second charge and discharge module 20. After being turned on, the battery under test connected to the connection component 30 can be charged and discharged.

[0066] By providing a switch unit 40 in each passage between the first and second charge and discharge modules and the connection assembly 30, the flexibility and accuracy of control can be further improved, and switching between the two charge and discharge modules can be conveniently performed.

[0067] In some optional embodiments, the battery testing device 100 further includes a control module 50 , and the control module 50 is communicatively connected to the plurality of switch units 40 .

[0068] In an embodiment in which a plurality of switch units 40 are provided, the battery testing device 100 may further include a control module 50 , and the control module 50 is used to control the on and off of each switch unit 40 .

[0069] Specifically, the control module 50 is communicatively connected with multiple switch units 40 respectively, which can be optionally directly connected through wiring or remotely connected through a signal transceiver module. The control module 50 can control the corresponding switch unit 40 to be turned on or off according to a preset control logic or under manual operation, so that a specific connection component 30 is switched to a preset electrical connection state, that is, it is electrically connected to the first charge and discharge module 10 or the second charge and discharge module 20.

[0070] By providing a control module 50 and enabling the same control module 50 to control a plurality of switch units 40 , the test device can be easily operated and can be automated to a certain extent, thereby saving manpower.

[0071] In some optional embodiments, the control module 50 is configured to control the connection component 30 to switch between a test state and a lithium plating state. In the test state, the first switch unit 41, the second switch unit 42 and the third switch unit 43 are disconnected, and the fourth switch unit 44 and the fifth switch unit 45 are turned on; in the lithium plating state, the first switch unit 41, one of the second switch units 42 and the third switch unit 43 are turned on, and the fourth switch unit 44 and the fifth switch unit 45 are disconnected.

[0072] In an embodiment where the battery testing device 100 includes a control module 50 and multiple switch units 40, the control module 50 can control the on and off of each switch, and control each connection component 30 so that the multiple connection components 30 can switch between the test state and the lithium plating state independently of each other.

[0073] Specifically, taking a certain connection component 30 in the test device as an example, the three electrode terminals in the connection component 30 are respectively electrically indirectly connected to the four output ends of the two charge and discharge modules through the first switch unit 41 to the fifth switch unit 45. When the connection component 30 is switched to the test state, the first to third switch units 43 connected to the first charge and discharge module 10 are disconnected, and the fourth switch unit 44 and the fifth switch unit 45 connected to the second charge and discharge module 20 are turned on, so that the second charge and discharge module 20 can apply a certain electrical signal to the positive terminal 31 and the negative terminal 32 and the battery under test connected thereto, so as to realize the charge and discharge test.

[0074] When the component switches to the lithium replenishment state, the fourth and fifth switch units remain in the disconnected state, and first the first switch unit 41 and one of the second switch units 42 and the third switch unit 43 are turned on. After a preset period of time, the first switch unit 41 and the other of the second switch unit 42 and the third switch unit 43 are switched on to replenish lithium to the positive and negative electrodes of the battery under test respectively.

[0075] By providing the control module 50 and making it conduct the connection component 30 to different charging and discharging machines respectively in two states, the connection component 30 and the battery cell under test can be conveniently switched between the two states.

[0076] In some optional embodiments, the battery testing device 100 further includes a voltage monitoring component. In a testing state, the voltage monitoring component is electrically connected to the reference electrode terminal 33 and is used to monitor the voltage of the reference electrode terminal 33 .

[0077] Optionally, the battery cell tested by the battery testing device 100 may have three electrodes, namely, a positive electrode, a negative electrode and a reference electrode. In the lithium replenishing state, the positive electrode and the negative electrode are electrically connected to the first output terminal 11 in sequence, and the reference electrode remains electrically connected to the reference electrode terminal 33; in the testing state, the positive electrode and the negative electrode are electrically connected to the positive terminal 31 and the negative terminal 32, respectively.

[0078] On this basis, the battery testing device 100 may also include a voltage monitoring component. During the test, the reference electrode that does not participate in the charge and discharge test can be electrically connected to the voltage monitoring component to detect the voltage level at the reference electrode in real time, thereby further improving the accuracy of the test.

[0079] Optionally, when setting up the voltage monitoring component, the same monitoring component can be electrically connected to multiple reference electrode terminals 33 through wiring to save space and reduce costs.

[0080] In some optional embodiments, the control module 50 is configured to: control at least part of the multiple fourth switch units 44 and at least part of the multiple fifth switch units 45 respectively connected to the multiple connection components 30 to be turned on at the same time, and control the number of multiple first switch units 41 and multiple second switch units 42 respectively connected to the multiple connection components 30 to be turned on at the same time to be less than or equal to one.

[0081] In an embodiment in which a control module 50 is provided, the control module 50 can control the on and off of each switch unit 40 respectively, wherein the switch unit 40 connected to the fourth output terminal 22 and the fifth output terminal in the second charge and discharge module 20 is used to form a test channel, and the switch unit 40 connected to the first to third output terminals 21 in the first charge and discharge module 10 is used to form a lithium replenishment channel.

[0082] During operation, multiple test channels can be provided simultaneously in the battery testing device 100. The specific number of test channels can be set according to the number of battery cells to be tested. Correspondingly, only one conductive lithium replenishment channel can be set at the same time to increase the number of connecting components 30 that can be used simultaneously and as test channels, thereby further improving the test efficiency.

[0083] In some optional embodiments, the battery testing device 100 also includes a shell 60, which encloses a housing cavity, in which the first charge and discharge module 10 and the second charge and discharge module 20 are disposed, and the positive terminal 31, the negative terminal 32 and the reference electrode terminal 33 at least partially extend outside the housing cavity.

[0084] The battery testing device 100 may also include a shell 60 for providing accommodation, support and protection. The shell 60 encloses a housing cavity. The shell 60 may include a main body with an opening and a cover covering the opening to facilitate placing the two charging and discharging modules in the housing cavity.

[0085] The first charge and discharge module 10 and the second charge and discharge module 20 are both disposed in the accommodating cavity. In an embodiment in which the battery testing device 100 includes a control module 50 and a switch unit 40 , the control module 50 and the switch unit 40 can be embedded in the shell 60 to facilitate control operations from the outside of the shell 60 .

[0086] Furthermore, the connection assembly 30 may include three terminals and signal lines connected to the terminals. The signal lines may extend from the accommodating cavity to the outside of the shell 60 to place each terminal outside the accommodating cavity for easy electrical connection with the battery cell under test.

[0087] By providing a shell 60 and accommodating the two charging modules therein, the two charging and discharging modules can be integrated into the same shell 60, thereby reducing the volume and improving the protection performance and space utilization.

[0088] In the second aspect, the present application provides a battery testing device, including the battery testing device 100, a supporting member and a control device in any embodiment of the first aspect, the battery testing device 100 includes a control module 50; a supporting frame, which is arranged adjacent to the battery testing device 100, and the supporting frame is used to support the battery cell to be tested; and a control device, which is communicatively connected to the control module 50.

[0089] The present application also provides a battery testing device, which uses the battery testing device 100 in any embodiment of the first aspect to test the battery. The battery testing device includes the battery testing device 100, a supporting member, and a control device, wherein the supporting member can be optionally in the form of a multi-layer support frame structure for placing the battery cells to be tested, and the number of layers and size of the supporting member can be set according to the number and size of the battery cells to be tested in the same batch.

[0090] Optionally, when a certain connection component 30 is not connected to a battery cell, the end of the connection component 30 can be detachably connected to the support member by means of snap connection, crimping or clamping connection, so that the tested battery cell can be quickly and conveniently connected after being placed on the support member. Exemplarily, the output end of each terminal in the connection component 30 for connecting to the battery cell can be set as a spring shark clip, which can be clamped in a preparatory position on the support member when not connected for easy access.

[0091] The control device is used to control one or more devices including the battery testing device 100. In the embodiment where the battery testing device 100 is provided with a control module 50, the control device is used to communicate with the control module 50 and use the control module 50 as a central machine. In the embodiment where the battery testing device also includes other devices, the other devices can also be provided with a central machine for controlling their internal components, and each central machine is connected to the control device for overall control. It is understood that the communication connection here includes direct electrical connection through a signal harness or remote transmission of information through a signal transceiver module.

[0092] The battery testing device in the embodiment of the present application has all the beneficial effects of the battery testing device 100 in the first aspect. For details, please refer to the specific description of the battery testing device 100 in the above embodiments, which will not be repeated in this embodiment.

[0093] The embodiment of the present application provides a battery testing device 100, including a first charge and discharge module 10, a second charge and discharge module 20 and a connecting component 30, wherein the first charge and discharge module 10 is provided with a first output terminal 11 and a second output terminal 12; the second charge and discharge module 20 is provided with a third output terminal 21 and a fourth output terminal 22, and the output current of the first charge and discharge module 10 is less than the output current of the second charge and discharge module 20; the connecting component 30 includes a positive terminal 31, a negative terminal 32 and a reference electrode terminal 33; wherein the first output terminal 11 is used to be electrically connected to the positive terminal 31 and the negative terminal 32, the second output terminal 12 is used to be electrically connected to the reference electrode terminal 33, the third output terminal 21 is used to be electrically connected to the positive terminal 31, and the fourth output terminal 22 is used to be electrically connected to the negative terminal 32.

[0094] Among them, the battery testing device 100 includes multiple connecting components 30, the first charging and discharging module 10 includes a first output terminal 11 and a second output terminal 12, the second charging and discharging module 20 is provided with multiple third output terminals 21 and multiple fourth output terminals 22, and the multiple third output terminals 21 and the multiple fourth output terminals 22 are respectively arranged in one-to-one correspondence with the positive terminal 31 and the negative terminal 32.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery testing device, characterized in that: include: A first charging and discharging module is provided with a first output terminal and a second output terminal; A second charge and discharge module is provided with a third output terminal and a fourth output terminal, and an output current of the first charge and discharge module is smaller than an output current of the second charge and discharge module; a connection assembly, including a positive terminal, a negative terminal, and a reference electrode terminal; Among them, the first output end is used to be electrically connected to the positive terminal and the negative terminal, the second output end is used to be electrically connected to the reference electrode terminal, the third output end is used to be electrically connected to the positive terminal, and the fourth output end is used to be electrically connected to the negative terminal.

2. The battery testing device according to claim 1, characterized in that: The battery testing device includes a plurality of the connecting components, and the second charging and discharging module is provided with a plurality of the third output terminals and a plurality of the fourth output terminals, and the plurality of the third output terminals and the plurality of the fourth output terminals are respectively used to be electrically connected to the plurality of the positive terminals and the plurality of the negative terminals.

3. The battery testing device according to claim 2, characterized in that: The number of the third output terminals and the number of the fourth output terminals are greater than the number of the first output terminals and the number of the second output terminals.

4. The battery testing device according to claim 3, characterized in that: The first charge and discharge module includes a first output end and a second output end, the first output end is used to be electrically connected to the plurality of positive terminals and the plurality of negative terminals respectively, and the second output end is used to be electrically connected to the plurality of reference electrode terminals.

5. The battery testing device according to claim 3, characterized in that: The third output terminal and the fourth output terminal are respectively arranged in one-to-one correspondence with the positive terminal and the negative terminal.

6. The battery testing device according to claim 1, characterized in that: The battery testing device further includes a plurality of switch units, the switch units including a first switch unit, a second switch unit, a third switch unit, a fourth switch unit and a fifth switch unit; The first switch unit is used to control the on-off between the first output terminal and the positive terminal, the second switch unit is used to control the on-off between the first output terminal and the negative terminal, the third switch unit is used to control the on-off between the second output terminal and the reference electrode terminal, the fourth switch unit is used to control the on-off between the third output terminal and the positive terminal, and the fifth switch unit is used to control the on-off between the fourth output terminal and the negative terminal.

7. The battery testing device according to claim 6, characterized in that: The battery testing device further includes a control module, and the control module is communicatively connected with the plurality of switch units respectively.

8. The battery testing device according to claim 7, characterized in that: The control module is configured to control the connection component to switch between a test state and a lithium plating state, wherein in the test state, the first switch unit, the second switch unit and the third switch unit are disconnected, and the fourth switch unit and the fifth switch unit are turned on; In the lithium plating state, the first switch unit, one of the second switch units, and the third switch unit are turned on, and the fourth switch unit and the fifth switch unit are turned off.

9. The battery testing device according to claim 8, characterized in that: The battery testing device further comprises a voltage monitoring component. In the testing state, the voltage monitoring component is electrically connected to the reference electrode terminal and is used to monitor the voltage of the reference electrode terminal.

10. The battery testing device according to claim 7, characterized in that: The control module is configured to: control at least part of the plurality of fourth switch units and at least part of the plurality of fifth switch units respectively connected to the plurality of connection components to be turned on at the same time, and control the number of the plurality of first switch units and the plurality of second switch units respectively connected to the plurality of connection components to be turned on at the same time to be less than or equal to one.

11. The battery testing device according to claim 1, characterized in that: The battery testing device also includes a shell, which encloses a housing cavity, the first charge and discharge module and the second charge and discharge module are arranged in the housing cavity, and the positive terminal, the negative terminal and the reference electrode terminal at least partially extend outside the housing cavity.

12. A battery testing device, characterized in that: include: The battery testing device according to any one of claims 1 to 11, wherein the battery testing device comprises a control module; A support frame, disposed adjacent to the battery testing device, and used for supporting a battery cell to be tested; A control device is communicatively connected with the control module.

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