CN222825641U - A device for testing battery safety performance - Google Patents
A device for testing battery safety performance Download PDFInfo
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- CN222825641U CN222825641U CN202420625308.4U CN202420625308U CN222825641U CN 222825641 U CN222825641 U CN 222825641U CN 202420625308 U CN202420625308 U CN 202420625308U CN 222825641 U CN222825641 U CN 222825641U
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- battery
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- limiting fixing
- safety performance
- testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
本实用新型涉及一种用于电池安全性能测试的装置，包括夹板，此夹板有一对，用于对电池正面进行限位；限位固定件，此限位固定件至少有两组，两组限位固定件相间隔设置，且其间距与电池高度大致相等；两组限位固定件分别与电池顶面和底面相抵。本实用新型首先通过设置一对夹板，对电池正面进行限位；其次通过不少于两组的限位固定件对电池顶面及电池底面进行限位；为了保证安全性能测试中位于电池顶面的顶盖贴片不发生过热膨胀，防爆阀开启压力正常，其中一组限位固定件设置于防爆阀外侧且位于正负极柱之间。
The utility model relates to a device for testing the safety performance of batteries, including a pair of clamps for limiting the front of the battery; a limiting fixture, at least two groups of which are arranged at intervals, and the intervals are roughly equal to the height of the battery; the two groups of limiting fixtures are respectively against the top and bottom surfaces of the battery. The utility model first limits the front of the battery by setting a pair of clamps; secondly, the top and bottom surfaces of the battery are limited by no less than two groups of limiting fixtures; in order to ensure that the top cover patch located on the top surface of the battery does not overheat and expand during the safety performance test, and the opening pressure of the explosion-proof valve is normal, one group of limiting fixtures is arranged on the outside of the explosion-proof valve and between the positive and negative poles.
Description
Technical Field
The utility model relates to the technical field of lithium ion battery safety, in particular to a device for testing battery safety performance.
Background
The lithium ion battery has the high-quality characteristics of light weight, high energy density, long service life and the like, and is widely applied. However, safety accidents of the lithium ion power battery happen occasionally, the safety performance of the lithium ion power battery is directly related to the life and property safety of people, and meanwhile, the safety performance of the lithium ion power battery is closely related to the large-scale industrialization of new energy automobiles. In the research and development stage, the lithium ion battery needs to be subjected to safety test required by national standards to verify the safety performance of the battery. Under the intervention of external conditions such as heat, force and electricity, gas is generated in the battery, so that the internal gas pressure of the battery is gradually increased, and the top cover of the battery is inflated and deformed under the action of pressure, so that the opening pressure of the explosion-proof valve is 20% -30% higher than the conventional opening pressure. When the opening pressure of the explosion-proof valve is increased, the energy of converting the air pressure energy into the air jet power energy at the moment of opening the explosion-proof valve is increased, the external impact force of the battery valve is stronger, and the damage to the polar plate caused by the air flow disturbance in the battery valve due to pressure difference is larger. Therefore, the deformation of the top cover is limited by using a tool, and the normal opening of the explosion-proof valve is ensured, so that the air pressure energy is reduced to be converted into air jet power energy, and the safety performance of the battery in the test is further improved.
The battery safety testing device comprises an outer cover body and a storage table, wherein the storage table sequentially comprises a cover plate, a support plate and a bottom plate from top to bottom, the support plate is connected to the bottom plate, a plurality of height limiting blocks are arranged between the cover plate and the support plate, and the shape of an opening at the lower side of the outer cover body is matched with that of the bottom plate. The utility model adopts the combination of the outer cover body and the object placing table, has low manufacturing cost, solves the problem of large occupied space of the conventional oven, and is convenient for observing the to-be-tested piece during testing.
The cover plate, the supporting plate and the height limiting block are arranged in the prior art, but the height limiting block is used for connecting the cover plate and the supporting plate, limiting can be carried out on two sides of a battery only, when the battery is tested, the section of the battery which is not limited can bulge, the explosion-proof valve is expanded and deformed due to the patch of the top cover of the battery, the opening pressure is higher than the set pressure, and the position stress of a welding seam of the battery is overlarge, so that the battery is cracked and damaged.
In addition, the above-mentioned prior art can only perform heating detection on the battery, and cannot perform other performance tests, such as overcharge, needling, and the like.
Disclosure of utility model
Aiming at the defects that in the prior art, only two sides of a battery are limited, the section of the battery which is not limited is expanded, the explosion-proof valve is expanded and deformed due to a patch of a top cover of the battery, the opening pressure is higher than the set pressure, and the battery can only be heated and detected and other performance tests cannot be performed, the utility model aims to provide a device for testing the safety performance of the battery.
The technical scheme provided by the utility model is as follows:
The device for testing the safety performance of the battery comprises a pair of clamping plates, at least two groups of limiting fixing pieces, two groups of limiting fixing pieces and two groups of limiting fixing pieces, wherein the clamping plates are used for limiting the front surface of the battery, the two groups of limiting fixing pieces are arranged at intervals and have the same interval as the height of the battery, and the two groups of limiting fixing pieces are propped against the top surface and the bottom surface of the battery respectively.
The clamping plate is preferably provided with two groups of through holes, the first group of through holes are matched with the top surface of the battery, the second group of through holes are matched with the bottom surface of the battery, and the limiting fixing piece is arranged in the through holes in a penetrating mode.
Preferably, the through hole comprises a hole for receiving a conductive material,
The first through holes and the second through holes are arranged at intervals and are matched with a group of limiting fixing pieces to limit the top surface of the battery;
The third through hole and the fourth through hole are arranged at intervals and matched with the other group of limiting fixing pieces to limit the bottom surface of the battery.
Preferably, the first through hole and the second through hole are positioned on the same horizontal plane, the third through hole and the fourth through hole are also positioned on the same horizontal plane, the distance between the first through hole and the second through hole is smaller than the distance between the third through hole and the fourth through hole, and the height difference between the two groups of limiting fixing pieces is matched with the height value of the battery.
The limiting fixing piece comprises a first limiting fixing piece and a second limiting fixing piece, wherein the first limiting fixing piece and the second limiting fixing piece are located on the outer side of an explosion-proof valve of the battery top cover patch and located between the positive pole post and the negative pole post.
Preferably, the spacing fixing piece further comprises a third spacing fixing piece and a fourth spacing fixing piece, and the distance between the third spacing fixing piece and the fourth spacing fixing piece is smaller than the length of the bottom surface of the battery.
Preferably, the limiting fixing piece is of a rod-shaped structure, and the through hole is matched with the rod-shaped structure in shape to limit the battery.
The limiting fixing piece is a screw matched with the screw hole, one end of the screw is provided with a screw head, and the cross section area of the screw head is larger than that of the through hole.
Preferably, the cross section of the screw head is circular, and the diameter is not smaller than 2cm.
Preferably, the clamping plate and the limiting fixing piece are subjected to insulation treatment, and the thickness of the clamping plate is not smaller than 8mm.
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
The utility model firstly carries out limit on the front surface of a battery by arranging a pair of clamping plates, secondly carries out limit on the top surface of the battery and the bottom surface of the battery by the cooperation of the through holes and the limit fixing pieces, and in order to ensure that the top cover patch positioned on the top surface of the battery does not generate overheat expansion in the safety performance test, the opening pressure of the explosion-proof valve is normal, and the first limit fixing piece and the second limit fixing piece are arranged on the outer side of the explosion-proof valve and are positioned between the positive pole and the negative pole.
In addition, the battery can be connected with an external control system to perform various safety performance tests such as overcharge, thermal runaway, needling, heating and the like.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a device for testing the safety performance of a battery according to the present application;
FIG. 2 is a front view of an apparatus for testing battery safety performance according to the present application;
FIG. 3 is a right side view of an apparatus for battery safety performance testing according to the present application;
FIG. 4 is a top view of an apparatus for battery safety performance testing according to the present application;
FIG. 5 is a schematic view showing the overall structure of a limited battery in an apparatus for testing battery safety performance according to the present application;
fig. 6 is a schematic view of a battery top cover patch structure according to the present application.
Reference numerals in the schematic drawings illustrate:
The clamping plate 1, the first through hole 11, the second through hole 12, the third through hole 13 and the fourth through hole 14;
The battery front 21, the battery top 22, the battery top cover patch 23, the explosion-proof valve 231, the positive pole 232 and the negative pole 233;
The first limiting fixing piece 31, the second limiting fixing piece 32, the third limiting fixing piece 33 and the fourth limiting fixing piece 34.
Detailed Description
For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective. Also, the terms "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for modification or adjustment of the relative relationships thereof, as they are also considered within the scope of the utility model without substantial modification to the technical context.
In the prior art, when the safety performance test is carried out on the battery, only two front sides of the battery are generally limited, and when the internal air pressure of the battery is increased, the top cover of the battery is swelled and deformed, so that the opening pressure of the explosion-proof valve is 20% -30% higher than the conventional opening pressure. When the opening pressure of the explosion-proof valve is increased, the energy of converting the air pressure energy into the air jet power energy at the moment of opening the explosion-proof valve is increased, the external impact force of the battery valve is stronger, and the damage to the polar plate caused by the air flow disturbance in the battery valve due to pressure difference is larger.
According to the device for testing the safety performance of the battery, disclosed by the application, the deformation of the top cover of the battery is limited, and the normal opening of the explosion-proof valve is ensured, so that the air pressure energy is reduced to be converted into air jet power energy, and the safety performance of the battery in the test is further improved.
The device for testing the safety performance of the battery comprises a clamping plate 1 and a pair of limiting fixing pieces, wherein the clamping plate 1 is provided with at least two groups of limiting fixing pieces, the two groups of limiting fixing pieces are arranged at intervals and have the same interval as the height of the battery, and the two groups of limiting fixing pieces are respectively propped against the top surface 22 and the bottom surface of the battery.
Preferably, the clamping plate 1 is provided with at least two groups of through holes matched with the limiting fixing pieces, the first group of through holes are matched with the top surface 22 of the battery, the second group of through holes are matched with the bottom surface of the battery, and the limiting fixing pieces penetrate through the through holes. The battery front 21, the battery top 22 and the bottom can be limited or fixed by mutually assembling the clamping plates 1, the through holes and the limiting fixing pieces.
Specifically, the first set of through holes includes a first through hole 11 and a second through hole 12, and the corresponding first set of limiting fixing members are a first limiting fixing member 31 and a second limiting fixing member 32, where the first set of through holes and the first set of limiting fixing members limit or fix the top surface 22 of the battery. The second group of through holes comprises a third through hole 13 and a fourth through hole 14, the corresponding second group of limiting fixing pieces are a third limiting fixing piece 33 and a fourth limiting fixing piece 34, and the bottom surface of the battery is limited or fixed by the second group of through holes and the second group of limiting fixing pieces.
The first set of through holes is located in the same horizontal plane and the second set of through holes is located in another horizontal plane, which is a mathematical concept, i.e. a horizontal plane consisting entirely of horizontal parallel lines. The first group of through holes and the second group of through holes are arranged at intervals and are parallel to each other, the distance between the first group of through holes is smaller than the distance between the second group of through holes, the distance between the second group of through holes is smaller than the length of the bottom surface of the battery, namely, the distance between the third limiting fixing piece 33 and the fourth limiting fixing piece 34 is smaller than the length of the bottom surface of the battery.
In order to ensure proper opening of the explosion-proof valve 231 and reduce damage to the battery pole piece, the first set of limiting fixture mounting locations are located outside the explosion-proof valve 231 on the battery top cover patch 23 and between the positive and negative posts 232, 233.
More specifically, the through holes and the limiting fixing pieces can be arranged into different structures according to safety performance testing requirements. If only the battery is required to be limited, and larger displacement cannot occur, the limiting fixing piece can be arranged into a smooth rod-shaped structure, the sealing piece can be arranged in the through hole, the sealing piece can also not be arranged in the through hole, the shape of the through hole is matched with the rod-shaped structure, and the limitation of the battery is completed. The cross section of the rod-shaped structure of the limiting fixing piece can be round, the square cross section can also be hexagonal, the specific cross section shape is not limited, and the limiting function can be met.
If the battery is required to be fixed and is not allowed to displace, the limiting fixing piece can be set as a screw, the through hole is a screw hole, one end of the screw is provided with a screw head, the cross section area of the screw head is larger than that of the through hole, the cross section of the screw head is preferably circular, the diameter of the screw head is not smaller than 2cm, and the battery is fixed when the screw is screwed in the screw hole. The screw and the screw hole are only one fixing mode, and can be set as other adaptive parts, so that the fixing function is met.
The clamping plate 1 and the limiting fixing piece are subjected to insulation treatment, the clamping plate is preferably a steel plate, and the thickness of the clamping plate is not less than 8mm.
When the safety test such as overcharging, thermal runaway, needling, heating and the like is started, the front face 21 of the battery, the top face 22 of the battery and the bottom face are limited or fixed, the top cover cannot deform after the battery is inflated, the explosion-proof valve is normally opened, the energy of converting air pressure energy into air jet power energy at the moment of opening the explosion-proof valve is smaller, the loss of pole pieces in the battery is smaller, the front face 21 of the battery cannot bulge and deform to cause overlarge stress at the position of a welding line, and abnormal cracking of the welding line is prevented.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (10)
1. An apparatus for testing the safety performance of a battery,
Characterized by comprising the following steps:
the clamping plates (1), the clamping plates (1) are provided with a pair for limiting the front surface (21) of the battery;
The limiting fixing pieces are at least two groups, the two groups of limiting fixing pieces are arranged at intervals, the interval is approximately equal to the height of the battery, and the two groups of limiting fixing pieces are respectively propped against the top surface (22) and the bottom surface of the battery.
2. The device for testing the safety performance of the battery according to claim 1, wherein the clamping plate (1) is provided with two groups of through holes, the first group of through holes are matched with the top surface (22) of the battery, the second group of through holes are matched with the bottom surface of the battery, and the limiting fixing piece penetrates through the through holes.
3. The apparatus for battery safety performance test of claim 2, wherein the through hole comprises:
The first through hole (11) and the second through hole (12), the first through hole (11) and the second through hole (12) are arranged at intervals, and are matched with a group of limiting fixing pieces to limit the top surface (22) of the battery;
The third through hole (13) and the fourth through hole (14) are arranged at intervals, and are matched with the other group of limiting fixing pieces to limit the bottom surface of the battery.
4. A device for battery safety performance test according to claim 3, wherein the first through hole (11) and the second through hole (12) are located on the same horizontal plane, the third through hole (13) and the fourth through hole (14) are also located on the same horizontal plane, the distance between the first through hole (11) and the second through hole (12) is smaller than the distance between the third through hole (13) and the fourth through hole (14), and the height difference between the two groups of limiting fixing pieces is matched with the height value of the battery.
5. The device for testing the safety performance of a battery according to claim 1, wherein the limiting fixing parts comprise a first limiting fixing part (31) and a second limiting fixing part (32), and the first limiting fixing part (31) and the second limiting fixing part (32) are positioned outside an explosion-proof valve (231) of a top cover patch (23) of the battery and between a positive pole (232) and a negative pole (233).
6. The device for testing the safety performance of a battery according to claim 5, wherein the limiting fixing piece further comprises a third limiting fixing piece (33) and a fourth limiting fixing piece (34), and the distance between the third limiting fixing piece (33) and the fourth limiting fixing piece (34) is smaller than the length of the bottom surface of the battery.
7. The device for testing the safety performance of the battery according to claim 1, wherein the limiting fixing piece is of a rod-shaped structure, and the through hole is matched with the rod-shaped structure in shape to limit the battery.
8. The device for testing the safety performance of the battery according to claim 2, wherein the through hole is a screw hole, the limiting fixing piece is a screw matched with the screw hole, one end of the screw is provided with a screw head, and the cross-sectional area of the screw head is larger than that of the through hole.
9. The device for testing the safety performance of a battery according to claim 8, wherein the cross section of the screw head is circular, and the diameter of the screw head is not smaller than 2cm.
10. The device for testing the safety performance of the battery according to claim 1, wherein the clamping plate (1) and the limiting fixing piece are subjected to insulation treatment, and the thickness of the clamping plate (1) is not smaller than 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420625308.4U CN222825641U (en) | 2024-03-28 | 2024-03-28 | A device for testing battery safety performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420625308.4U CN222825641U (en) | 2024-03-28 | 2024-03-28 | A device for testing battery safety performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222825641U true CN222825641U (en) | 2025-05-02 |
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ID=95496098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420625308.4U Active CN222825641U (en) | 2024-03-28 | 2024-03-28 | A device for testing battery safety performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222825641U (en) |
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2024
- 2024-03-28 CN CN202420625308.4U patent/CN222825641U/en active Active
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