Multifunctional clamp device for lithium battery charging and discharging test

Abstract

The utility model discloses a multifunctional clamp device used for lithium battery charge and discharge test, the clamp device is composed of a bottom plate and two side plates, a battery mounting groove on the bottom plate is combined with a through small hole on the side plates, so that the battery can be accurately placed in the test process; the rail-type adjustable connector can be flexibly adjusted according to the size of the battery, connection with a charging and discharging control test module can be realized, and tests of various battery specifications are supported. The device adopts a modular design, and the bottom plate and the side plates can be expanded according to requirements to adapt to batteries of different numbers and specifications, so that the device has good expandability and operation flexibility. The utility model provides an efficient, flexible and economical solution for the charging and discharging test of the lithium battery, is particularly suitable for multi-scene application from a laboratory to a production line, and provides comprehensive technical support for the research and development and performance verification of the battery.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery testing, specifically relating to a multifunctional fixture device for lithium battery charge and discharge testing. Background Technology

[0002] With the widespread application of lithium batteries in electric vehicles, consumer electronics, and energy storage devices, the importance of battery performance testing is becoming increasingly prominent. Battery performance testing includes individual cell performance testing, battery pack consistency testing, and modular battery performance evaluation. However, existing battery testing equipment has limited functionality, making it difficult to simultaneously meet multiple testing needs. Furthermore, the equipment is complex in structure and cumbersome to operate, which hinders the efficiency and flexibility of actual testing.

[0003] In existing technologies, performance testing devices for individual batteries generally have the limitation of only being able to test a single battery independently. Meanwhile, series or parallel testing devices for modular battery packs are often large and complex to install, restricting testing efficiency in laboratories and production lines. Therefore, designing a lithium battery testing fixture device that is simple in structure, versatile in function, and highly adaptable, capable of quickly switching between different testing modes to meet the testing needs of lithium batteries in various scenarios, has significant practical value. Summary of the Invention

[0004] The main purpose of this utility model is to overcome the shortcomings and deficiencies of the prior art and provide a multifunctional fixture device for lithium battery charge and discharge testing. This device can realize single cell testing, series modular testing and parallel modular testing, which solves the problem of the single function of existing testing equipment. At the same time, it has the advantages of simple structure, convenient operation and strong scalability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides a multifunctional fixture device for lithium battery charge and discharge testing, including a left side plate, a right side plate, a bottom plate, a positive connector, a negative connector, and wires. The upper surface of the left side plate is provided with a through hole, and a connector mounting groove is provided in the through hole, which is integrated with the through hole. The diameter of the connector mounting groove is smaller than the diameter of the through hole. The right side plate is symmetrically arranged with the left side plate. The upper surface of the bottom plate is provided with a battery mounting groove, which extends along both ends of the short side of the upper surface of the bottom plate and passes through it. The center of the cross section of the battery mounting groove perpendicular to the upper surface of the bottom plate and the center of the cross section of the through hole parallel to the upper surface of the left or right side plate are coaxial.

[0007] The positive or negative connector includes a terminal block, a locking mechanism, a seal, and a contact. The terminal block is adapted to the size of the connector mounting slot and includes a first terminal and a second terminal. The first terminal extends through both ends along the central axis, and one end of the first terminal has a thread. The second terminal has openings at both ends, one opening of which is adapted to the size of the first terminal, and the other opening of which is adapted to the size of the contact. The locking mechanism and the seal are sequentially arranged along the thread on the outer surface of the first terminal. The contact is installed through the second terminal opening. The first terminal and the second terminal are fixedly connected. The positive or negative connector is installed in the connector mounting slots of the left or right side plate respectively through the terminal block.

[0008] Lithium battery charge and discharge tests include single-cell tests, series module tests, and parallel module tests. Depending on the test, wires are used to make adaptive connections between the positive and negative connectors.

[0009] As a preferred technical solution, multiple battery mounting slots are provided and evenly distributed along the long side of the upper surface of the base plate; the through holes are adapted to the battery mounting slots.

[0010] As a preferred technical solution, the upper surface of the left or right side plate has a downwardly extending and cut groove as a mortise for fixing with the tenon of the base plate. The mortise and the through hole are distributed at intervals. The tenon is set on the side surface of the base plate with the long side and is adapted to the mortise.

[0011] As a preferred technical solution, the battery mounting slot is provided with a through hole that extends downwards.

[0012] As a preferred technical solution, the left side plate, right side plate and bottom plate are all made of high-strength aluminum alloy material.

[0013] As a preferred technical solution, the inner surface of the battery mounting slot is provided with an anti-slip coating or a buffer pad layer.

[0014] As a preferred technical solution, a set of through holes is provided on each side of the short side of the upper surface of the base plate, with at least one through hole in each set.

[0015] As a preferred technical solution, the terminals of the positive connector are not shorter than those of the negative connector; the contacts of the positive connector are not shorter than those of the negative connector.

[0016] As a preferred technical solution, both the terminal block and the contact are made of highly conductive copper or copper alloy, and the outer surface of the terminal block is coated with an insulating coating.

[0017] As a preferred technical solution, the positive and negative connectors are adaptively connected using wires according to different tests, specifically as follows:

[0018] During single-cell testing, wires are connected according to the positive and negative terminals of the battery, and the wires are then connected to the charge / discharge control test module.

[0019] During series testing, the batteries are installed in the same direction. The wires leading out from the first positive connector and the last negative connector are connected to the charge and discharge control test module. Other wires are connected as follows: the previous negative connector is connected to the next positive connector through a wire.

[0020] During parallel testing, the batteries are installed in the same direction, all positive connectors are connected by wires, and all negative connectors are connected by wires. A wire is led out from any positive connector and a wire from any negative connector to the charge / discharge control test module.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] (1) This utility model has multiple functions such as single cell battery testing, series modular testing and parallel modular testing, which solves the problem of the single function of existing testing equipment.

[0023] (2) This utility model consists of a base plate and two side plates. The battery mounting groove on the base plate and the through hole design on the side plates are combined to ensure that the battery can be accurately placed during the test. At the same time, combined with the positive and negative connectors, the circuit can be changed by simply changing the wiring method, so as to realize practical tasks such as single cell battery testing, series modular testing and parallel modular testing.

[0024] (3) This utility model adopts a modular design. The base plate and side plates can be expanded as needed. The expanded base plates can be connected and fixed through the designed through holes, adapting to different numbers and specifications of batteries, and have good scalability and operational flexibility. The modular design of the device makes it highly scalable, and users can quickly adjust the configuration of the device according to their needs to adapt to the testing requirements of different numbers, specifications and types of battery packs. This flexibility greatly improves the applicability of the testing device and effectively reduces the space occupied and cost of the equipment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an exploded view of the charging board according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the side plate structure of an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the base plate in an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of the positive electrode connector according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the negative electrode connector according to an embodiment of the present invention.

[0031] In the picture:

[0032] 1-Left side plate; 2-Right side plate; 3-Base plate; 4-Positive connector; 5-Negative connector; 11-Through hole; 12-Connector mounting slot; 13-Rivet; 31-Tongue; 32-Battery mounting slot; 33-Through hole; 41-Positive connector terminal; 42-Positive connector locking mechanism; 43-Positive connector seal; 44-Positive connector contact; 51-Negative connector terminal; 52-Negative connector locking mechanism; 53-Negative connector seal; 54-Negative connector contact; 41a-First terminal of positive connector; 41b-Second terminal of positive connector; 51a-First terminal of negative connector; 52b-Second terminal of negative connector. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0034] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0035] Regarding the meaning of directional terms, this utility model provides the following explanation:

[0036] (1) "Upper surface" and "lower surface". In this utility model, each structure is placed separately on a horizontal plane. The orientation of the part is defined from the perspective of part processing. That is, when the part is cut or welded, the surface with the widest distribution of the structure or the highest frequency of cutting and welding is regarded as the upper surface, and the opposite surface is the lower surface.

[0037] (2) "Up" and "Down". This utility model places each structure on a horizontal plane and defines the orientation of the part from the perspective of part processing. That is, the direction of the upper or lower surface vertically upward is "up" and the opposite is "down".

[0038] Example 1.

[0039] This embodiment provides a multifunctional fixture device for lithium battery charge and discharge testing, including a left side plate 1, a right side plate 2, a base plate 3, a positive connector 4, a negative connector 5, and wires. The upper surface of the left side plate 1 is provided with a through hole 11, and a connector mounting groove 12 is provided in the through hole 11, which is integrated with the through hole. The diameter of the connector mounting groove 12 is smaller than the diameter of the through hole. The right side plate 2 is symmetrically arranged with the left side plate 1. The upper surface of the base plate 3 is provided with a battery mounting groove, which extends along both ends of the short side of the upper surface of the base plate 3 and passes through it. The center of the cross section of the battery mounting groove 32 perpendicular to the upper surface of the base plate 3 and the center of the cross section of the through hole 11 parallel to the upper surface of the left side plate 1 or the right side plate 2 are coaxial.

[0040] The positive connector 4 or negative connector 5 includes terminals (41, 51), locking mechanisms (42, 52), seals (43, 53), and contacts (44, 54). The terminals (41, 51) are adapted to the dimensions of the connector mounting groove 12 and include a first terminal (41a, 51a) and a second terminal (41b, 51b). The first terminal (41a, 51a) extends through both ends along the central axis, and one end of the first terminal (41a, 51a) has a thread on its outer surface. The second terminal (41b, 51b) has openings at both ends, with one opening matching the size of the first terminal. The other end opening is adapted to the size of the contact (44, 54). The locking mechanism (42, 52) and the sealing element (43, 53) are sequentially threaded on the outer surface of the first terminal (41a, 51a). The contact (44, 54) is installed through the second wiring opening. The first terminal (41a, 51a) and the second terminal (41b, 51b) are fixedly connected by threads. The positive connector 4 or the negative connector 5 is installed in the connector mounting groove 12 of the left side plate 1 or the right side plate 2 respectively through the terminal post (41, 51).

[0041] In this embodiment, the left side plate 1, right side plate 2, and bottom plate 3 are suitable for single-cell testing. A battery mounting slot 32 is provided in the bottom plate 3, and correspondingly, there is only one through hole 11 in each of the left side plate 1 and right side plate 2.

[0042] At this time, during battery testing, due to the lack of a fixed connection between the left side plate 1, the right side plate 2, and the bottom plate 3, the battery can only be tested by hand. To solve this problem, this embodiment provides 1-2 sets of mortise and tenon structures in the left side plate 1, the right side plate 2, and the bottom plate 3 respectively. That is, the long side of the upper surface of the left side plate 1 or the right side plate 2 is provided with a downwardly extending groove as a mortise 13, and the tenon 31 is provided on the side surface of the bottom plate 3 with the long side, adapted to the mortise 13.

[0043] During testing, after the battery assembly is completed, the left side plate 1, right side plate 2, and bottom plate 3 can be fixedly connected by mortise and tenon joints.

[0044] Example 2.

[0045] like Figure 1 and Figure 2 As shown, based on Example 1, in order to accommodate more diverse battery charging and discharging experiments, this example provides multiple battery mounting slots 32, which are evenly distributed along the long side of the upper surface of the base plate 3; the through holes 11 are adapted to the battery mounting slots 32.

[0046] Meanwhile, in this embodiment, multiple sets of mortise and tenon structures can be set in the left side plate 1, right side plate 2, and bottom plate 3 for fixed connection. In this case, mortises 13 and through holes 11 are distributed at intervals, and tenons 31 are also appropriately set.

[0047] Example 3.

[0048] like Figure 1 and Figure 3 As shown, since a large amount of heat is generated during battery charging and discharging experiments, the device needs to overcome the problems of excessive local heat release or untimely heat dissipation. This embodiment provides the following three methods for heat dissipation, which helps to keep the battery temperature within a reasonable range during high-power testing and prevent test result errors caused by overheating.

[0049] (1) A through hole 33 is provided in the battery mounting slot 32. By drilling through holes 33 in each battery mounting slot 32, a ventilation path can be provided in a timely manner through heat dissipation methods such as air cooling.

[0050] (2) Heat dissipation can also be achieved by increasing the height of the battery installation and leaving some space below the battery. For example, ribs can be set on both sides of the bottom of the battery mounting slot 32 to support the battery, reduce the contact area between the battery and the base plate 3, and increase the heat dissipation space.

[0051] (3) The left side plate 1, the right side plate 2, and the bottom plate 3 are all made of high-strength aluminum alloy. Aluminum alloy has lightweight and excellent mechanical strength, and also has good thermal conductivity, which can effectively disperse the heat generated by the battery during battery testing, ensuring the structural stability and thermal management performance of the device.

[0052] Example 4.

[0053] In addition to heat dissipation issues, the inner surface of the battery mounting slot 32 is also equipped with an anti-slip coating or a cushioning pad to ensure that the battery remains stable during testing.

[0054] Example 5.

[0055] like Figure 1 and Figure 3 As shown, based on a single module, modular expansion is also possible. Each module includes a base plate 3, two side plates, and mounting connectors. A set of through holes 33 is provided on each side of the short side of the upper surface of the base plate 3, with at least one through hole 33 in each set. Preferably, two through holes 33 are provided in each set.

[0056] The extension can be achieved using one or more of the following methods:

[0057] The first type allows users to add or remove battery mounting slots 32 on the base plate 3 or adjust the layout of the through holes on the side plate according to actual needs, in order to accommodate different numbers and types of battery packs. The second type allows users to add or remove modules according to testing needs. The modules are connected through through holes 33 on both sides of the short side of the upper surface of the base plate 3 and are electrically connected through standardized interfaces, enabling quick assembly and switching between different testing modes.

[0058] Example 6.

[0059] like Figure 4 and Figure 5 As shown, regarding the connectors, the terminal 41 of the positive connector 4 is not shorter than that of the negative connector 5, and the contact 44 of the positive connector 4 is not shorter than that of the negative connector 5.

[0060] To facilitate the differentiation of positive and negative terminals and wiring, the terminals 41 and contacts 44 of the positive connector 4 are both longer.

[0061] Furthermore, the terminal 41 of the positive connector 4 is specifically a cylinder, and the terminal 51 of the negative connector 5 is specifically a prism.

[0062] In addition, to further ensure conductivity, the terminals (41, 51) and contacts (44, 54) are made of highly conductive copper or copper alloy, and the outer surface of the terminals (41, 51) is coated with an insulating coating.

[0063] Positive connector 4 and negative connector 5 are connected to the charge / discharge control test module via a standardized interface, enabling real-time transmission of key parameters such as battery voltage, current, and temperature. The test module adjusts the connection method according to the user-selected test mode (single cell test, series module test, parallel module test): for single cell tests, a single battery is connected to the test module via the connector; for series tests, multiple batteries are connected in series via the connector and then connected to the test module; for parallel tests, multiple batteries are connected in parallel and then connected to the test module. To more intuitively illustrate the connection methods, this embodiment specifically adopts the following connection method:

[0064] During single-cell testing, wires are connected according to the positive and negative terminals of the battery, and the wires are then connected to the charge / discharge control test module.

[0065] During series testing, the batteries are installed in the same direction. The wires leading out from the first positive connector 4 and the last negative connector 5 are connected to the charge and discharge control test module. Other wires are connected as follows: the first negative connector 5 and the last positive connector 4 are connected by wires.

[0066] During parallel testing, the batteries are installed in the same direction. All positive connectors 4 are connected by wires, and all negative connectors 5 are connected by wires. A wire is led out from any positive connector 4 and any negative connector 5 to connect to the charge and discharge control test module.

[0067] The principle of battery charge and discharge testing in this invention is as follows:

[0068] Depending on the testing requirements, users can choose from single-cell battery testing, series modular testing, or parallel modular testing modes: For single-cell testing, select a battery on the base plate in sequence and connect it to the charge / discharge control test module by adjusting the positive and negative connectors; for series testing, connect the positive and negative terminals of multiple batteries in sequence through the positive and negative connectors to form a series circuit and connect it to the charge / discharge control test module; for parallel testing, connect the positive and negative terminals of multiple batteries in parallel through the positive and negative connectors and connect them to the charge / discharge control test module to form a parallel circuit, and then connect it to the charge / discharge control test module.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A multifunctional clamping device for lithium battery charge and discharge testing, comprising a left side plate, a right side plate, a base plate, a positive electrode connector, a negative electrode connector, and wires, characterized in that, The upper surface of the left side plate is provided with a through hole, and a connector mounting groove is provided inside the through hole, which is integrated with the through hole. The diameter of the connector mounting groove is smaller than the diameter of the through hole. The right side plate is symmetrically arranged with the left side plate. The upper surface of the bottom plate is provided with a battery mounting groove, which extends along both ends of the short side of the upper surface of the bottom plate and passes through it. The center of the cross section of the battery mounting groove perpendicular to the upper surface of the bottom plate and the center of the cross section of the through hole parallel to the upper surface of the left or right side plate are coaxial. The positive or negative connector includes a terminal block, a locking mechanism, a seal, and a contact. The terminal block is adapted to the size of the connector mounting slot and includes a first terminal and a second terminal. The first terminal extends through both ends along the central axis, and one end of the first terminal has a thread. The second terminal has openings at both ends, one opening of which is adapted to the size of the first terminal, and the other opening of which is adapted to the size of the contact. The locking mechanism and the seal are sequentially arranged along the thread on the outer surface of the first terminal. The contact is installed through the second terminal opening. The first terminal and the second terminal are fixedly connected. The positive or negative connector is installed in the connector mounting slots of the left or right side plate respectively through the terminal block. Lithium battery charge and discharge tests include single-cell tests, series module tests, and parallel module tests. Depending on the test, wires are used to make adaptive connections between the positive and negative connectors.

2. The multifunctional clamp device for lithium battery charge and discharge testing according to claim 1, characterized in that, Multiple battery mounting slots are provided and evenly distributed along the long side of the upper surface of the base plate; the through holes are designed to fit the battery mounting slots.

3. The multifunctional clamp device for lithium battery charge and discharge testing according to claim 1, characterized in that, The left or right side plate has a downwardly extending groove on its long side as a mortise for fixing with the tenon of the base plate. The mortise and through holes are distributed at intervals. The tenon is set on the side surface of the base plate with a long side and is adapted to the mortise.

4. The multifunctional clamping device for lithium battery charge and discharge testing according to claim 1, characterized in that, The battery mounting slot has a through hole that extends downwards.

5. The multifunctional clamping device for lithium battery charge and discharge testing according to claim 1, characterized in that, The left side plate, right side plate, and bottom plate are all made of high-strength aluminum alloy.

6. The multifunctional clamping device for lithium battery charge and discharge testing according to claim 1, characterized in that, The inner surface of the battery mounting slot is provided with an anti-slip coating or a cushioning layer.

7. The multifunctional clamping device for lithium battery charge and discharge testing according to claim 1, characterized in that, The bottom plate has a set of through holes on each side of the short side of the upper surface, with at least one through hole in each set.

8. The multifunctional clamping device for lithium battery charge and discharge testing according to claim 1, characterized in that, The positive connector's terminal is not shorter than that of the negative connector; the positive connector's contact is not shorter than that of the negative connector.

9. The multifunctional clamping device for lithium battery charge and discharge testing according to claim 1, characterized in that, The terminals and contacts are made of highly conductive copper or copper alloy, and the outer surface of the terminals is coated with an insulating coating.

10. The multifunctional clamping device for lithium battery charge and discharge testing according to claim 1, characterized in that, Depending on the test, the positive and negative connectors are adaptively connected using wires, specifically as follows: During single-cell testing, wires are connected according to the positive and negative terminals of the battery, and the wires are then connected to the charge / discharge control test module. During series testing, the batteries are installed in the same direction. The wires leading out from the first positive connector and the last negative connector are connected to the charge and discharge control test module. Other wires are connected as follows: the previous negative connector is connected to the next positive connector through a wire. During parallel testing, the batteries are installed in the same direction, all positive connectors are connected by wires, and all negative connectors are connected by wires. A wire is led out from any positive connector and a wire from any negative connector to the charge / discharge control test module.

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