Battery test fixing tool

Abstract

The invention discloses a battery test fixing tool. The battery test fixing tool comprises a pressure assembly and a sealing assembly, a clamping cavity and an opening communicated with the clamping cavity are formed in the pressure assembly, the clamping cavity is used for placing a battery, the pressure assembly is used for pressing the part, located in the clamping cavity, of the battery, and the opening is used for placing the edge part of the battery; the sealing assembly is arranged at the opening and used for clamping the edge part of the battery, and the pressure assembly does not abut against the sealing assembly. According to the battery test fixing tool, the packaging strength of the edge part of the battery is enhanced, the large-current charging and discharging test item of the battery can be verified, and the situation that when the battery is charged and discharged at large current, a large amount of gas is generated in the battery and bursts through the packaging edge of the battery, and the battery is abnormal is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of battery test fixing tooling, and in particular to a battery test fixing tooling. Background Art

[0002] With the continuous development of the new energy industry, the battery will be tested before assembling the module, so as to better evaluate the performance of the battery and provide relevant reference for the design of the module. Therefore, the test method of the single battery should be as similar or consistent as possible with the module, so that the test results can provide accurate values ​​for the design of the module.

[0003] With the development of batteries, fast charging technology has become a trend. Batteries will produce gas during the charging and discharging process, especially when charging and discharging with large currents, which will increase the gas production of the battery. The gas will cause the battery to expand. If there is too much gas, it will break open the edge of the battery. Summary of the invention

[0004] One object of the present invention is to provide a battery testing fixture, which is intended to solve the technical problem of sealing during battery testing.

[0005] To achieve the above-mentioned purpose, the present invention provides a solution: a battery test fixture, which includes a pressure assembly and a sealing assembly; the pressure assembly is formed with a clamping cavity and an opening connected to the clamping cavity, the clamping cavity is used to place the battery, the pressure assembly is used to press the part of the battery located in the clamping cavity, and the opening is used to place the edge part of the battery; the sealing assembly is arranged at the opening, the sealing assembly is used to clamp the edge part of the battery, and the pressure assembly does not press the sealing assembly.

[0006] Optionally, the pressure assembly includes a pressure block and a first locking assembly, the pressure blocks are arranged opposite to each other to form a clamping cavity and an opening, and the first locking assembly connects the pressure blocks arranged opposite to each other and adjusts the distance between them.

[0007] Optionally, the first locking assembly includes a first rod and a first nut, and the first rod is sequentially penetrated by relatively arranged pressing blocks and is threadedly connected to the first nut.

[0008] Optionally, the first locking assembly further includes a preload spring, the first rod is provided with a preload spring, the preload spring is arranged between the first nut and the pressure block, and the preload spring is used to press one pressure block toward another pressure block.

[0009] Optionally, the pressing block includes an ear portion and a main portion, the ear portion is arranged on the peripheral side of the main portion, the first locking assembly is connected to the ear portion, a notch is arranged on the peripheral side of the main portion, the main portion relatively forms a clamping cavity, and the notch relatively forms an opening.

[0010] Optionally, a through hole penetrating two opposite sides of the main portion is opened in the thickness direction thereof.

[0011] Optionally, there are multiple ears, and the multiple ears are evenly spaced apart.

[0012] Optionally, the sealing assembly includes sealing blocks and a second locking assembly, the sealing blocks are arranged opposite to each other at the opening to clamp the edge portion of the battery, and the second locking assembly connects the oppositely arranged sealing blocks and adjusts the distance between them.

[0013] Optionally, the second locking assembly includes a second rod and a second nut, and the second rod passes through the oppositely arranged sealing blocks in sequence and is threadedly connected to the second nut.

[0014] Optionally, the sealing assembly further includes a silicone ring, which is arranged on a side of one sealing block facing the other sealing block.

[0015] The beneficial effects of the present invention are:

[0016] The pressure component is used to press the battery in the clamping cavity to simulate the pressure of the battery in normal working state. The sealing component is set at the opening, and the sealing component is used to clamp the edge of the battery to ensure that the battery does not leak from its edge. The battery test fixture strengthens the packaging strength of the edge of the battery, which can verify the battery's high-current charge and discharge test items to avoid the battery generating a large amount of gas inside the battery when it is charged and discharged at a high current, which may break the edge of the battery packaging and cause battery abnormality. In addition, the pressure component and the sealing component are independent of each other. The pressure component can adjust the pressure of the battery in the clamping cavity according to actual needs, and the sealing component can adjust the sealing of the battery at the opening according to actual needs. The two adjustment processes do not interfere with each other, thereby improving the convenience and accuracy of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the assembly structure of the battery test fixture provided by an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the exploded structure of a battery test fixture provided by an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of a top view of a battery test fixture provided by an embodiment of the present invention;

[0021] Figure 4The embodiment of the present invention provides Figure 3 Schematic diagram of the cross-sectional structure along the IV-IV direction;

[0022] Figure 5 The embodiment of the present invention provides Figure 3 Schematic diagram of the cross-sectional structure in the VV direction.

[0023] Description of the accompanying drawings: pressure assembly 10, clamping cavity 101, opening 102, pressure block 12, ear 121 main part 123, through hole 125, first locking assembly 14, first rod 141, first nut 143 preload spring 145, sealing assembly 20, sealing block 21, second locking assembly 23, second rod 232 second nut 234, silicone ring 24. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0027] See also Figure 1 and Figure 2 As shown, Figure 1 is a schematic diagram of the assembly structure of a battery test fixture provided by an embodiment of the present invention, Figure 2 It is a schematic diagram of the exploded structure of the battery test fixture provided by an embodiment of the present invention.

[0028] The embodiment of the present invention provides a battery test fixture, which includes a pressure assembly 10 and a sealing assembly 20. The pressure assembly 10 is formed with a clamping cavity 101 and an opening 102 connected to the clamping cavity 101. The clamping cavity 101 is used to place a battery. The battery can be a soft-pack battery or a hard-shell battery. The central area of ​​the battery and the part near the central area are mainly placed in the clamping cavity 101. The pressure assembly 10 is used to press the battery located in the clamping cavity 101 to simulate the pressure of the battery in a normal working state. The edge of the battery extends from the clamping cavity 101, and the opening 102 is used to place the edge of the battery; the sealing assembly 20 is arranged at the opening 102, and the sealing assembly 20 is used to clamp the edge of the battery to ensure that the battery does not leak from its edge. The pressure assembly 10 does not press the sealing assembly 20, and the pressure assembly 10 does not apply pressure to the sealing assembly 20. The sealing assembly 20 applies pressure to the edge of the battery by itself.

[0029] In this embodiment, the pressure assembly 10 is used to press the battery in the clamping cavity 101 to simulate the pressure of the battery in normal working state. The sealing assembly 20 is arranged at the opening 102. The sealing assembly 20 is used to clamp the edge of the battery to ensure that the battery does not leak from its edge. The battery test fixture strengthens the packaging strength of the edge of the battery, which can verify the battery's high-current charge and discharge test items, and avoid the battery generating a large amount of gas inside the battery when the battery is charged and discharged at a high current, which will break the edge of the battery packaging and cause battery abnormality. In addition, the pressure assembly 10 and the sealing assembly 20 are independent of each other. The pressure assembly 10 can adjust the pressure of the battery in the clamping cavity 101 according to actual needs, and the sealing assembly 20 can adjust the sealing of the battery at the opening 102 according to actual needs. The two adjustment processes do not interfere with each other, thereby improving the convenience and accuracy of operation.

[0030] See also Figures 1 to 5 As shown, Figure 3 is a schematic diagram of a top view of a battery test fixture provided by an embodiment of the present invention, Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the cross-sectional structure along the IV-IV direction. Figure 5 The embodiment of the present invention provides Figure 3 Schematic diagram of the cross-sectional structure in the VV direction.

[0031] In one embodiment, the pressure assembly 10 includes a pressure block 12 and a first locking assembly 14. The number of the pressure blocks 12 is at least two. In the process of applying pressure to the battery, the pressure blocks 12 are in a spaced relative state. The pressure blocks 12 are relatively arranged to form a clamping cavity 101 and an opening 102. The clamping cavity 101 can be located at the center position of the pressure block 12 and the area near the center position. The opening 102 can be located at the edge position of the pressure block 12. The first locking assembly 14 connects the relatively arranged pressure blocks 12 and adjusts the distance between them. In this embodiment, the clamping cavity 101 and the opening 102 are formed by relatively arranging at least two identical pressure blocks 12, thereby reducing the types of parts and reducing production costs. In addition, the first locking assembly 14 can not only connect multiple pressure blocks 12 together, but also change the distance between multiple pressure blocks 12 to change the pressure of the pressure blocks 12 on the battery.

[0032] Optionally, the first locking assembly 14 includes a first rod 141 and a first nut 143. The first rod 141 is sequentially penetrated by the relatively arranged pressure block 12 and is threadedly connected with the first nut 143. The pressure block 12 can be directional moved along the axis direction of the first rod 141, thereby increasing stability. A threaded structure is provided on the first rod 141, and a threaded structure is provided on the first nut 143. The first nut 143 and the first rod 141 are threadedly matched, and the first nut 143 moves along the axis direction of the first rod 141 during rotation. The first nut 143 applies pressure to the pressure block 12 during the process of moving toward the pressure block 12, so that the relatively arranged pressure blocks 12 are close to each other to increase the pressure on the battery. The first nut 143 reduces the pressure applied to the pressure block 12 during the process of moving away from the pressure block 12, so that the relatively arranged pressure blocks 12 are away from each other to reduce the pressure on the battery.

[0033] In this embodiment, the spacing between the relatively arranged pressing blocks 12 is adjusted by threaded engagement with the first rod 141 and the first female 143 to change the pressure exerted on the battery by the pressing blocks 12. It can be understood that the pressure exerted on the battery by the pressing blocks 12 will be slightly changed with each rotation of the first female 143, thereby finely adjusting the pressure exerted on the battery by the pressing blocks 12.

[0034] Optionally, the first locking assembly 14 further includes a preload spring 145, which is elastic and can generate elastic force when in a compressed or stretched state. The first rod 141 is provided with the preload spring 145, which is supported circumferentially by the first rod 141 during deformation to prevent the preload spring 145 from bending. The preload spring 145 is disposed between the first nut 143 and the pressure block 12, and is used to press one pressure block 12 toward another pressure block 12.

[0035] In this embodiment, the first female 143 first applies pressure to the preload spring 145 during the axial movement along the first rod 141, so that the preload spring 145 is deformed, and the preload spring 145 generates elastic force to act on the pressure block 12 after deformation, thereby achieving an elastic resistance effect. Compared with the previous embodiment, the first female 143 can be prevented from crushing the pressure block 12. In addition, the type of the preload spring 145 can also be replaced according to the required battery pressure to increase the test range.

[0036] Specifically, the pressing block 12 includes an ear portion 121 and a main portion 123, the ear portion 121 is arranged on the peripheral side of the main portion 123, the first locking assembly 14 is connected to the ear portion 121, and a notch is arranged on the peripheral side of the main portion 123, the main portion 123 relatively forms a clamping cavity 101, and the notch relatively forms an opening 102. In this embodiment, the ear portion 121 mainly serves to connect the first locking assembly 14, and the main portion 123 mainly serves to press the battery, so that the pressing block 12 is divided into areas according to functions, and the ear portion 121 is arranged on the peripheral side of the main portion 123, so as to avoid the first locking assembly 14 from accidentally damaging the battery located in the main portion 123 area during the connection process with the pressing block 12.

[0037] Optionally, there are multiple ears 121, and the multiple ears 121 are evenly spaced. The number of ears 121 shown in the figure is four, and the four ears 121 are evenly distributed on the four sides of the main part 123. The first locking assembly 14 applies force to the ear 121, and the ear 121 transfers the force to the main part 123, and the main part 123 finally applies pressure to the battery. When the ears 121 are evenly distributed, the force transferred from the ear 121 to the main part 123 is uniform, and then the force applied by the main part 123 to the battery is uniform. When the battery is subjected to uneven pressure, the normal operation of the battery will be affected, resulting in a significant reduction in the accuracy of the test.

[0038] Of course, the number of ears 121 can also be other numbers, such as 2, 8, etc., which are not listed here one by one.

[0039] Optionally, a through hole 125 is provided in the thickness direction of the main part 123, which passes through two opposite sides thereof. The through hole 125 connects the clamping cavity 101 and the outside. After an abnormality occurs in the battery, the gas can also be directly discharged through the through hole 125 to prevent a more serious accident. In addition, the through hole 125 is also convenient for heat dissipation. The external air can directly contact the battery through the through hole 125, thereby taking away the heat during the battery test.

[0040] The through hole 125 can be a circular hole or a long strip hole. The number of through holes 125 can be one, two, three, etc. It can be understood that, without destroying the overall strength of the main part 123, the more the number of through holes 125, the better, and the larger the size of the through holes 125, the better, so as to be more conducive to exhaust and heat dissipation.

[0041] In an optional embodiment, the sealing assembly 20 includes a sealing block 21 and a second locking assembly 23. The sealing blocks 21 are arranged opposite to each other at the opening 102. The number of the sealing blocks 21 is at least two. Before the battery test, the sealing blocks 21 arranged opposite to each other are in a spaced state for clamping the edge of the battery. The second locking assembly 23 connects the sealing blocks 21 arranged opposite to each other and adjusts the spacing between them. In this embodiment, the edge of the battery is sealed by relatively arranging at least two identical sealing blocks 21, thereby reducing the types of parts and reducing production costs. In addition, the second locking assembly 23 can not only connect multiple sealing blocks 21 together, but also change the spacing between multiple sealing blocks 21 to change the pressure of the sealing blocks 21 on the battery, thereby ensuring the reliability of the sealing of the edge of the battery.

[0042] Optionally, the second locking assembly 23 includes a second rod 232 and a second nut 234, and the second rod 232 is sequentially penetrated by the sealing block 21 disposed oppositely and is threadedly connected with the second nut 234. The second rod 232 is sequentially penetrated by the sealing block 21 disposed oppositely and is threadedly connected with the second nut 234, and the sealing block 21 can be directional moved along the axis direction of the second rod 232, thereby increasing stability. A threaded structure is provided on the second rod 232, and a threaded structure is provided on the second nut 234. The second nut 234 and the second rod 232 are threadedly matched, and the second nut 234 moves along the axis direction of the second rod 232 during the rotation process. The second nut 234 will apply pressure to the sealing block 21 in the process of moving toward the sealing block 21, so that the sealing blocks 21 disposed oppositely are close to each other, so as to increase the pressure on the edge portion of the battery. The second nut 234 will reduce the pressure applied to the sealing block 21 in the process of moving away from the sealing block 21, so that the sealing blocks 21 disposed oppositely are away from each other, so as to reduce the pressure on the edge portion of the battery.

[0043] In this embodiment, the spacing between the relatively arranged sealing blocks 21 is adjusted by threaded cooperation between the second rod 232 and the second female 234, so as to change the pressure of the sealing block 21 on the edge of the battery. It can be understood that the pressure of the sealing block 21 on the edge of the battery will be changed by two points every time the second female 234 rotates two circles, thereby finely adjusting the sealing performance of the sealing block 21 on the edge of the battery.

[0044] Optionally, the sealing assembly 20 further includes a silicone ring 24, which is elastic and deforms when subjected to pressure, and is disposed on a side of one sealing block 21 facing another sealing block 21. When the sealing blocks 21 move toward each other, the silicone ring 24 is squeezed, and the deformation of the silicone ring 24 fills the gap between the sealing blocks 21 to further improve the sealing line of the edge of the battery.

[0045] In order to enable those skilled in the art to have a further understanding of the present invention, the use process of the battery test fixture will be explained in detail below, but it is worth noting that it does not impose any limitation on the technical solution of the present invention.

[0046] 1. Place the battery between the oppositely arranged pressure blocks 12, and place the edge of the battery between the oppositely arranged sealing blocks 21; 2. The second nut 234 rotates relative to the second rod 232, and the second nut 234 drives the sealing blocks 21 to move closer to each other to press the edge of the battery; 3. The first nut 143 rotates relative to the first rod 141, and the first nut 143 compresses the pre-tightening spring 145. The pre-tightening spring 145 generates elastic force to drive the pressure blocks 12 to move closer to each other to apply appropriate force to the battery; 4. Connect the battery to the power supply and start the test.

[0047] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery test fixture, characterized in that: include: A pressure assembly is formed with a clamping cavity and an opening communicating with the clamping cavity, wherein the clamping cavity is used to place a battery, the pressure assembly is used to press a portion of the battery located in the clamping cavity, and the opening is used to place an edge portion of the battery; as well as A sealing component is arranged at the opening, and is used to clamp the edge portion of the battery. The pressure component does not press against the sealing component.

2. The battery test fixture according to claim 1, characterized in that: The pressure assembly includes a pressure block and a first locking assembly. The pressure blocks are arranged opposite to each other to form the clamping cavity and the opening. The first locking assembly connects the pressure blocks arranged opposite to each other and adjusts the distance between them.

3. The battery test fixture according to claim 2, characterized in that: The first locking assembly includes a first rod and a first nut. The first rod passes through the relatively arranged pressing blocks in sequence and is threadedly connected to the first nut.

4. The battery test fixture according to claim 3, characterized in that: The first locking assembly further includes a preload spring, the first rod is penetrated by the preload spring, the preload spring is arranged between the first nut and the pressing block, and the preload spring is used to press one pressing block toward the other pressing block.

5. The battery test fixture according to claim 2, characterized in that: The pressing block includes an ear portion and a main portion, the ear portion is arranged on the peripheral side of the main portion, the first locking assembly is connected to the ear portion, a notch is arranged on the peripheral side of the main portion, the main portion relatively forms the clamping cavity, and the notch relatively forms the opening.

6. The battery test fixture according to claim 5, characterized in that: The main portion is provided with through holes penetrating two opposite sides thereof in the thickness direction.

7. The battery test fixture according to claim 5, characterized in that: There are multiple ears, and the multiple ears are evenly spaced.

8. The battery test fixture according to any one of claims 1 to 7, characterized in that: The sealing assembly comprises a sealing block and a second locking assembly. The sealing blocks are arranged opposite to each other at the opening to clamp the edge portion of the battery. The second locking assembly connects the sealing blocks arranged opposite to each other and adjusts the distance between them.

9. The battery test fixture according to claim 8, characterized in that: The second locking assembly includes a second rod and a second nut, and the second rod passes through the sealing blocks that are arranged opposite to each other in sequence and is threadedly connected with the second nut.

10. The battery test fixture according to claim 8, characterized in that: The sealing assembly further comprises a silicone ring, and the silicone ring is arranged on a side of one sealing block facing the other sealing block.

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