Clamp and testing device

Abstract

The utility model relates to the technical field of battery testing equipment, and discloses a clamp and a testing device.The clamp comprises a clamping assembly and a pre-tightening piece, a first extension part is arranged on a plate body, so that when a battery cell is in an inverted state or a side-placed state, the shoulder part of the battery cell can abut against the first extension part, and therefore the battery cell is prevented from being damaged; the pole of the battery cell can penetrate through the gap, that is, when the fastener drives the first clamping plate and the second clamping plate to apply pre-tightening force to the battery cell, the first clamping plate and the second clamping plate can more comprehensively and stably fix and clamp the battery cell, so that the situation that the battery cell falls off is avoided, the stability is improved, and the battery fixing device is simple in structure and convenient to use. The operation is very simple, and in addition, when the shoulder part of the battery cell is positioned through the first extension part, whether the state of the battery cell is changed or not can be judged according to the electric contact condition of the first extension part and the battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery testing equipment technology, and in particular to a fixture and testing device. Background Technology

[0002] As integrated battery solutions and other system integration solutions mature, the demand for battery cells is also increasing. It is necessary to consider not only the stability of battery cells under different pressure conditions, but also the stability of battery cells in various states such as inverted and side-mounted. Therefore, when testing existing battery cells, the testing environment needs to be as similar as possible to the actual working environment.

[0003] Currently, existing battery cell clamps typically consist of two steel or aluminum plates, which are clamped together by bolts. In use, the preload on the battery cell is first adjusted by the bolts, and then the battery cell clamp is placed in a test chamber in different postures for simulated testing. Although this type of battery cell clamp has a simple structure, it has poor stability. It is easy for people to touch and move the clamp during operation, causing changes in the state of the battery cell, and the battery cell is also prone to falling off the clamp. Utility Model Content

[0004] The purpose of this invention is to provide a clamp and testing device that can not only stably clamp the battery cell and prevent changes in its state, but is also easy to use.

[0005] To achieve the above objectives, this utility model provides a clamp for holding battery cells, comprising:

[0006] A clamping assembly includes a first clamping plate and a second clamping plate spaced apart and correspondingly arranged along a first direction, forming a clamping space for inserting the battery cell. Both the first and second clamping plates include a plate body and a first extension. The plate body extends along a second direction, and the first extension is located at one end of the plate body in the second direction and extends toward the clamping space along the first direction. A gap is provided between the first extension of the first clamping plate and the first extension of the second clamping plate for the passage of the battery cell's terminal post.

[0007] A pre-tightening member extends through the first clamping plate and the second clamping plate along the first direction, and the pre-tightening member is used to adjust the pre-tightening force applied by the first clamping plate and the second clamping plate to the battery cell;

[0008] The first direction and the second direction intersect.

[0009] Optionally, the plate has a limiting groove on the side facing the clamping space, and a receiving cavity for accommodating the battery cell is formed between the limiting groove of the first clamping plate and the limiting groove of the second clamping plate.

[0010] Optionally, the preload includes a preload bolt and a preload nut, wherein the preload bolt passes through the first clamping plate and the second clamping plate along the first direction, and the preload nut is disposed at one end of the preload bolt.

[0011] Optionally, the plate body also has an elongated first mounting hole, the length direction of the first mounting hole extends along the second direction, the pre-tightening bolt passes through the first mounting hole of the first clamping plate and the first mounting hole of the second clamping plate along the first direction, and the pre-tightening bolt can slide along the first mounting hole in the second direction.

[0012] Optionally, it also includes a tray and a mounting bracket, wherein the plate body of the first clamping plate at the other end in the second direction and the plate body of the second clamping plate at the other end in the second direction are both detachably mounted to one side of the tray via the mounting bracket.

[0013] Optionally, the first clamping plate and the second clamping plate further include a second extension, which is disposed at the other end of the plate body in the second direction and extends in the first direction away from the clamping space. The mounting member passes through the tray and is connected to the second extension in the second direction.

[0014] Optionally, the tray has a plurality of spaced second mounting holes, and the mounting member can pass through any one of the second mounting holes along the second direction to connect with the first clamping plate and the second clamping plate. The second mounting hole is an elongated hole or a round hole, and when the second mounting hole is an elongated hole, the length direction of the second mounting hole extends along the first direction, and the mounting member can slide along the second mounting hole in the first direction.

[0015] Optionally, a liquid cooling mechanism is also included, which is located on the side of the plate away from the clamping space, and is used to cool the battery cell.

[0016] Optionally, it also includes a temperature testing mechanism for detecting the temperature of the battery cell. The temperature testing mechanism is located on the side of the plate away from the clamping space. The side of the plate away from the clamping space has a detection groove that extends through the plate along the first direction. The temperature testing mechanism has a probe end that is inserted into the detection groove and can contact the battery cell.

[0017] Optionally, taking the plane extending from the center line of the clamping space in the first direction as the plane of symmetry, the two sides of the plate are symmetrically provided with the same number of pre-tightening members, and there are at least two pre-tightening members on each side of the plate.

[0018] This utility model also proposes a testing device, including: a testing box and a clamp as described above, the testing box having a placement cavity, the battery cell clamp being disposed in the placement cavity, and the plate body of the first clamping plate at the other end in the second direction and the plate body of the second clamping plate at the other end in the second direction being detachably mounted on the top wall or side wall of the placement cavity.

[0019] Compared with the prior art, the advantages of the fixture and testing device of this utility model embodiment are as follows:

[0020] This application provides a first extension on the plate, allowing the shoulder of the battery cell to abut against the first extension when the cell is in an inverted or sideways position, and the terminal of the battery cell to pass through the gap. This means that when the fastener applies a pre-tightening force to the battery cell using the first and second clamping plates, the first and second clamping plates can more comprehensively and stably clamp the battery cell, thus preventing it from falling off and improving stability. Furthermore, this application has a simple structure and is very easy to operate. In addition, when positioning the shoulder of the battery cell using the first extension, this application can also determine whether the state of the battery cell has changed by observing the electrical contact between the first extension and the battery cell. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the test fixture for battery cells according to Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the connection structure between the clamping assembly and the pre-tightening member in Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first clamping plate in Embodiment 1 of this utility model;

[0024] Figure 4 This is a top view of the test fixture for battery cells described in Embodiment 1 of this utility model;

[0025] Figure 5 This is Embodiment 1 of the present utility model. Figure 4 Cross-sectional view in the AA direction;

[0026] Figure 6 This is a schematic diagram of the internal structure of the battery cell testing device when the test fixture for the battery cell is installed on the top wall of the receiving cavity, according to Embodiment 1 of this utility model.

[0027] Figure 7 This is a schematic diagram of the internal structure of the testing device for battery cells when the test fixture for battery cells is installed on the side wall of the receiving cavity, according to Embodiment 1 of this utility model.

[0028] Figure 8 This is a schematic diagram of the structure of the tray described in Embodiment 2 of this utility model;

[0029] Figure 9 This is a schematic diagram of the structure of the test fixture for battery cells described in Embodiment 3 of this utility model;

[0030] Figure 10 This is a side view of the test fixture for battery cells described in Embodiment 3 of this utility model.

[0031] In the figure, 1. Test fixture for battery cell; 11. Clamping assembly; 111A. First clamping plate; 111B. Second clamping plate; 1111. Plate body; 11111. Limiting groove; 11112. First mounting hole; 11113. Detection groove; 1112. First extension; 1113. Second extension; 112. Clamping space; 113. Gap; 114. Receiving cavity; 12. Pre-tightening component; 121. Pre-tightening bolt; 122. Pre-tightening nut; 13. Tray; 131. Second mounting hole; 14. Mounting component; 15. Liquid cooling mechanism; 16. Temperature testing mechanism; 161. Probe end; 2. Test box; 21. Placement cavity; 3. Battery cell; 31. Terminal; X. First direction; Y. Second direction. Detailed Implementation

[0032] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0033] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Example 1

[0036] like Figures 1-5 As shown, a clamp 1 according to Embodiment 1 of this utility model is used to clamp a battery cell 3, including: a clamping assembly 11 and a pre-tightening member 12. The clamping assembly 11 includes a first clamping plate 111A and a second clamping plate 111B spaced apart and correspondingly arranged along a first direction X. A clamping space 112 is formed between the first clamping plate 111A and the second clamping plate 111B. The clamping space 112 is used to place the battery cell 3. The first clamping plate 111A and the second clamping plate 111B each include a plate body 1111 and a first extension portion 1112. The plate body 1111 extends along a second direction Y, and the first extension portion 111... 2 is located at one end of the plate 1111 in the second direction Y and extends towards the clamping space 112 in the first direction X. A gap 113 is left between the first extension 1112 of the first clamping plate 111A and the first extension 1112 of the second clamping plate 111B. The gap 113 is used for the electrode post 31 of the power supply core 3 to pass through. The pre-tightening member 12 passes through the first clamping plate 111A and the second clamping plate 111B in the first direction X. The pre-tightening member 12 is used to adjust the first clamping plate 111A and the second clamping plate 111B to apply a pre-tightening force to the battery cell 3. The first direction X and the second direction Y intersect.

[0037] Based on the above solution, this application provides a first extension 1112 on the plate 1111, so that when the battery cell 3 is in an inverted or sideways state, the shoulder of the battery cell 3 can abut against the first extension 1112, and the terminal post 31 of the battery cell 3 can pass through the gap 113. That is, when the fastener drives the first clamping plate 111A and the second clamping plate 111B to apply a pre-tightening force to the battery cell 3, the first clamping plate 111A and the second clamping plate 111B can more comprehensively and stably fix and clamp the battery cell 3, thereby avoiding the battery cell 3 from falling off and improving stability. Moreover, the structure of this application is simple and the operation is very simple. In addition, when the shoulder of the battery cell 3 is positioned by the first extension 1112, this application can also determine whether the state of the battery cell 3 has changed by the electrical contact between the first extension 1112 and the battery cell 3.

[0038] like Figure 2 and Figure 3 As shown, for ease of use, the plate 1111 has a limiting groove 11111 on the side facing the clamping space 112. The limiting groove 11111 of the first clamping plate 111A and the limiting groove 11111 of the second clamping plate 111B form a receiving cavity 114 for accommodating the battery cell 3. The limiting groove 11111 is used to position the installation position of the battery cell 3 and can further increase the clamping effect of the battery cell 3. In addition, it can also prevent interference between the pre-tightening member 12 and the battery cell 3.

[0039] like Figure 2As shown, for ease of use, the pre-tightening component 12 includes a pre-tightening bolt 121 and a pre-tightening nut 122. The pre-tightening bolt 121 passes through the first clamping plate 111A and the second clamping plate 111B along the first direction X. The pre-tightening nut 122 is located at one end of the pre-tightening bolt 121. The pre-tightening force on the battery cell 3 is adjusted by turning the pre-tightening nut 122.

[0040] like Figure 2 and Figure 3 As shown, in order to facilitate the adjustment of the position of the preload bolt 121, the plate 1111 also has an elongated first mounting hole 11112. The length direction of the first mounting hole 11112 extends along the second direction Y. The preload bolt 121 passes through the first mounting hole 11112 of the first clamping plate 111A and the first mounting hole 11112 of the second clamping plate 111B along the first direction X, and the preload bolt 121 can slide along the first mounting hole 11112 in the second direction Y.

[0041] like Figure 1 , Figure 4 and Figure 5 As shown, in order to facilitate the installation of the battery cell 3, a tray 13 and a mounting component 14 are also included. The plate body 1111 of the first clamping plate 111A and the plate body 1111 of the second clamping plate 111B are detachably mounted on one side of the tray 13 through the mounting component 14. In use, the position of the clamping component 11 can be fixed by the tray 13.

[0042] like Figures 3-5 As shown, in order to facilitate the connection between the tray 13 and the first clamping plate 111A and the second clamping plate 111B, the first clamping plate 111A and the second clamping plate 111B also include a second extension 1113. The second extension 1113 is located at the other end of the plate body 1111 in the second direction Y and extends in the direction away from the clamping space 112 along the first direction X. The mounting member 14 passes through the tray 13 and is connected to the second extension 1113 along the second direction Y.

[0043] like Figures 3-5 As shown, in order to facilitate the adjustment of the installation positions of the first clamping plate 111A and the second clamping plate 111B, the tray 13 has a plurality of spaced second mounting holes 131. The mounting member 14 can pass through any one of the second mounting holes 131 along the second direction Y and connect with the first clamping plate 111A and the second clamping plate 111B. The second mounting hole 131 is an elongated hole, and the length direction of the second mounting hole 131 extends along the first direction X. The mounting member 14 can slide along the second mounting hole 131 in the first direction X. By setting the second mounting hole 131, the relative positions of the first clamping plate 111A and the second clamping plate 111B can be adjusted according to the specifications of the battery cell 3. In addition, the elongated second mounting hole 131 can also make the movement of the first clamping plate 111A and the second clamping plate 111B more convenient.

[0044] like Figure 4 As shown, in order to make the pre-tightening force applied to the battery cell 3 more uniform and further improve the test effect, the plane extending from the center line of the clamping space 112 in the first direction X is taken as the plane of symmetry. The two sides of the plate 1111 are symmetrically provided with the same number of pre-tightening members 12, and there are at least 2 pre-tightening members 12 on each side of the plate 1111.

[0045] like Figure 6 and Figure 7 As shown, this utility model also provides a testing device, including: a test box 2 and a clamp 1 as described above. The test box 2 has a placement cavity 21. The battery cell 3 clamp 1 is disposed in the placement cavity 21. The plate body 1111 of the first clamping plate 111A and the plate body 1111 of the second clamping plate 111B are detachably installed on the top wall or side wall of the placement cavity 21 at the other end of the second direction Y.

[0046] Based on the above scheme, this application can fix the clamp 1 by the top wall or side wall of the placement cavity 21 to ensure the stability of the clamp 1 in both side-lying and inverted states. Furthermore, different fixing positions can be set on the top wall or side wall of the placement cavity 21 to facilitate standardized testing and improve testing efficiency.

[0047] Example 2

[0048] like Figure 8 As shown, the difference between this embodiment 2 and embodiment 1 is that the second mounting hole 131 is a round hole.

[0049] Based on the above scheme, this application can adjust the relative positions of the first clamping plate 111A and the second clamping plate 111B according to the specifications of the battery cell 3, and the spacing between the multiple second mounting holes 131 can be preset according to the specifications of commonly used battery cells 3 to improve testing efficiency.

[0050] Example 3

[0051] like Figure 9 and Figure 10 As shown, the difference between this embodiment 3 and embodiment 1 is that it also includes a liquid cooling mechanism 15. The liquid cooling mechanism 15 is located on the side of the plate 1111 away from the clamping space 112. The liquid cooling mechanism 15 is used to cool the battery cell 3.

[0052] Based on the above scheme, this application sets up a liquid cooling mechanism 15, which enables the battery cell 3 to be inverted or placed on its side while simultaneously simulating the actual working scenario of the battery cell 3, thereby making the test results more consistent with reality.

[0053] like Figure 9 and Figure 10As shown, to further improve the testing effect, a temperature testing mechanism for detecting the temperature of the battery cell 3 is also included. The temperature testing mechanism 16 is located on the side of the plate 1111 away from the clamping space 112. The side of the plate 1111 away from the clamping space 112 has a detection groove 11113. The detection groove 11113 passes through the plate 1111 along the first direction X. The temperature testing mechanism has a probe end 161, which is inserted into the detection groove 11113 and can contact the battery cell 3. By setting the temperature testing mechanism, the temperature of the battery cell 3 during the testing process can be collected, which facilitates real-time monitoring of the temperature change at the center of the large surface of the battery cell 3. Furthermore, the setting of the probe end 161 and the detection groove 11113 can further ensure the accuracy of the measurement data.

[0054] In summary, this utility model provides a clamp 1 and a testing device. By providing a first extension 1112 on the plate 1111, when the battery cell 3 is in an inverted or sideways state, the shoulder of the battery cell 3 can abut against the first extension 1112, and the terminal post 31 of the battery cell 3 can pass through the gap 113. That is, when the fastener drives the first clamping plate 111A and the second clamping plate 111B to apply a pre-tightening force to the battery cell 3, the first clamping plate 111A and the second clamping plate 111B can more comprehensively and stably fix and clamp the battery cell 3, thereby avoiding the battery cell 3 from falling off and improving stability. Moreover, the structure of this application is simple and the operation is very simple. In addition, when the shoulder of the battery cell 3 is positioned by the first extension 1112, this application can also determine whether the state of the battery cell 3 has changed by the electrical contact between the first extension 1112 and the battery cell 3.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A clamp (1) for clamping a cell (3), characterized in that, include: A clamping assembly (11) includes a first clamping plate (111A) and a second clamping plate (111B) spaced apart and correspondingly arranged along a first direction (X). A clamping space (112) is formed between the first clamping plate (111A) and the second clamping plate (111B). The clamping space (112) is used to insert the battery cell (3). Both the first clamping plate (111A) and the second clamping plate (111B) include a plate body (1111) and a first extension (1112). 111) Extending along the second direction (Y), the first extension (1112) is provided at one end of the plate (1111) in the second direction (Y) and extends along the first direction (X) toward the clamping space (112). A gap (113) is left between the first extension (1112) of the first clamping plate (111A) and the first extension (1112) of the second clamping plate (111B), the gap (113) for the electrode post (31) of the power supply core (3) to pass through; and A pre-tightening member (12) extends through the first clamping plate (111A) and the second clamping plate (111B) along the first direction (X). The pre-tightening member (12) is used to adjust the pre-tightening force applied by the first clamping plate (111A) and the second clamping plate (111B) to the battery cell (3). The first direction (X) and the second direction (Y) intersect.

2. The clamp (1) according to claim 1, characterized in that The plate (1111) has a limiting groove (11111) on the side facing the clamping space (112), and a receiving cavity (114) for accommodating the battery cell (3) is formed between the limiting groove (11111) of the first clamping plate (111A) and the limiting groove (11111) of the second clamping plate (111B).

3. The clamp (1) according to claim 1, characterized in that, The preload (12) includes a preload bolt (121) and a preload nut (122). The preload bolt (121) passes through the first clamping plate (111A) and the second clamping plate (111B) along the first direction (X). The preload nut (122) is located at one end of the preload bolt (121).

4. The clamp (1) according to claim 3, characterized in that, The plate (1111) also has an elongated first mounting hole (11112), the length direction of which extends along the second direction (Y). The preload bolt (121) passes through the first mounting hole (11112) of the first clamping plate (111A) and the first mounting hole (11112) of the second clamping plate (111B) along the first direction (X), and the preload bolt (121) can slide along the first mounting hole (11112) in the second direction (Y).

5. The clamp (1) according to claim 1, characterized in that, It also includes a tray (13) and a mounting member (14), wherein the plate body (1111) of the first clamping plate (111A) at the other end in the second direction (Y) and the plate body (1111) of the second clamping plate (111B) at the other end in the second direction (Y) are detachably mounted to one side of the tray (13) via the mounting member (14).

6. The clamp (1) according to claim 5, characterized in that, The first clamping plate (111A) and the second clamping plate (111B) further include a second extension (1113), which is located at the other end of the plate body (1111) in the second direction (Y) and extends in the first direction (X) away from the clamping space (112). The mounting member (14) passes through the tray (13) in the second direction (Y) and is connected to the second extension (1113).

7. The clamp (1) according to claim 5, characterized in that, The tray (13) has a plurality of spaced second mounting holes (131). The mounting member (14) can pass through any one of the second mounting holes (131) along the second direction (Y) and connect with the first clamping plate (111A) and the second clamping plate (111B). The second mounting hole (131) is an elongated hole or a round hole. When the second mounting hole (131) is an elongated hole, the length direction of the second mounting hole (131) extends along the first direction (X). The mounting member (14) can slide along the second mounting hole (131) in the first direction (X).

8. The clamp (1) according to claim 1, characterized in that, It also includes a liquid cooling mechanism (15), which is located on the side of the plate (1111) away from the clamping space (112) and is used to cool the battery cell (3).

9. The clamp (1) according to claim 1, characterized in that, It also includes a temperature testing mechanism (16) for detecting the temperature of the battery cell (3). The temperature testing mechanism (16) is located on the side of the plate (1111) away from the clamping space (112). The side of the plate (1111) away from the clamping space (112) has a detection groove (11113). The detection groove (11113) passes through the plate (1111) along the first direction (X). The temperature testing mechanism (16) has a probe end (161). The probe end (161) is inserted into the detection groove (11113) and can contact the battery cell (3).

10. The clamp (1) according to claim 1, characterized in that, With the plane extending from the center line of the clamping space in the first direction (X) as the plane of symmetry, the two sides of the plate (1111) are symmetrically provided with the same number of pre-tightening members (12), and there are at least two pre-tightening members (12) on each side of the plate (1111).

11. A testing apparatus, characterized in that, include: The test box (2) and the fixture (1) as described in any one of claims 1-10, wherein the test box (2) has a placement cavity (21), the fixture (1) is disposed in the placement cavity (21), and the plate body (1111) of the first clamping plate (111A) at the other end in the second direction (Y) and the plate body (1111) of the second clamping plate (111B) at the other end in the second direction (Y) are detachably mounted on the top wall or side wall of the placement cavity (21).

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