Battery air leakage structure
By providing a support between the battery safety valve and the electrode member, timely deflation is achieved when the electrode member expands or moves inside, solving the problem that the prior art cannot deflate in these situations, and improving the safety of the battery.
Patent Information
- Application Number
- CN202421703926.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-18
AI Technical Summary
Existing battery safety valves cannot deflate during internal electrode deformation or electrode movement, resulting in the inability to prevent electrode explosion in time.
A battery exhaust structure is designed, by providing a support between the safety valve and the electrode member, the support member can squeeze the weak position of the safety valve, causing it to damage and deflate. At the same time, when the internal pressure of the housing reaches the air discharge value, the weak position of the safety valve can also be damaged to deflate.
It realizes timely deflation when the electrode parts expand or move inside, prevents the electrode from exploded, and at the same time, deflation can be deflated when the internal pressure of the shell is too high, improving battery safety.
Smart Images
Figure CN223006932U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air leakage structures, in particular to a battery air leakage structure. Background Art
[0002] Lithium batteries are widely used in the fields of medical treatment, computers, automobiles, etc. A safety valve is usually installed on a power lithium battery to release pressure in time when the internal pressure of the battery exceeds the standard. The current battery safety valve is usually a metal sheet with a convex middle. When the internal pressure of the battery exceeds the air leakage value of the safety valve, the weak point of the safety valve is damaged by pressure extrusion, so as to release air. However, when the internal electrode deforms or the electrode moves inside, since the internal pressure does not reach the air leakage value, the safety valve cannot release air. However, during the deformation or movement of the internal electrode, air leakage is also required to prevent the electrode from exploding and other situations. Summary of the Utility Model
[0003] Therefore, the technical problem to be solved by the utility model is to provide a battery air leakage structure that can release air during the deformation or movement of the internal electrode.
[0004] To solve the above technical problem, the utility model provides a battery air leakage structure, including: a safety valve, the safety valve is connected to and penetrates through the housing, and the safety valve includes a weak position; a support member, the support member is connected to the electrode member, the electrode member is located inside the housing and is connected to the housing, the support member is located between the safety valve and the electrode member, and the support member can abut against the safety valve.
[0005] In an embodiment of the utility model, the weak position includes a first weak position and a second weak position, the safety valve includes a first connection portion and a bending portion, the first connection portion is located at the edge of the bending portion, the first weak position is located at the connection position between the bending portion and the first connection portion, the first connection portion is connected to the housing, and the second weak position is located at the connection position between the housing and the first connection portion.
[0006] In an embodiment of the utility model, the support member includes a support plate that abuts against the weak position, and one end of the support plate away from the safety valve is connected to the electrode member.
[0007] In an embodiment of the utility model, there are two support plates that abut against the first weak position, the two support plates are symmetrically arranged, and the distance between the connection positions of the two support plates and the electrode member is greater than the distance between the connection positions of the two support plates and the safety valve.
[0008] In one embodiment of the utility model, the support plates are provided with two and are against the second weak position, the two support plates are symmetrically arranged, and the two support plates are connected to each other at one end away from the safety valve, the electrode member is connected to a fixing member, the fixing member is provided with a slot, and the two support plates are clamped in the slot.
[0009] In an embodiment of the present invention, a plurality of air holes are provided on the support plate.
[0010] In one embodiment of the present invention, the support member includes a top block, the top block is connected to the electrode member, and a gap exists between a side of the top block close to the safety valve and the safety valve.
[0011] In an embodiment of the present invention, the support member includes an elastic member, one end of the elastic member is connected to the electrode member, and the other end of the elastic member is against the safety valve.
[0012] In an embodiment of the present invention, one end of the elastic member away from the electrode member is connected to a connecting plate, and the connecting plate abuts against the safety valve.
[0013] In an embodiment of the present invention, at least two elastic members are provided and are symmetrically arranged.
[0014] The above technical solution of the utility model has the following advantages compared with the prior art:
[0015] The battery deflation structure described in the utility model is provided with a support member between the safety valve and the electrode member. When the electrode member expands or moves inside, the support member can squeeze the safety valve. When the support member damages the weak position of the safety valve, the safety valve deflates. At the same time, when the internal pressure of the shell reaches the deflation value of the safety valve, the weak position of the safety valve can also be damaged to deflate, so that the battery deflation structure can deflate when the internal pressure of the shell is too large, the electrode member expands too much, and the electrode member moves too far inside the shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein
[0017] Figure 1 It is a cross-sectional view of a battery deflation structure in Embodiment 1 of the utility model;
[0018] Figure 2 It is a front view of the battery;
[0019] Figure 3 is a top view of the battery;
[0020] Figure 4 It is a cross-sectional view of the battery air leakage structure in the first embodiment;
[0021] Figure 5 It is a top view of the connection structure between the support plate and the mounting plate;
[0022] Figure 6 It is a cross-sectional view of the battery air leakage structure in the second embodiment;
[0023] Figure 7 It is a cross-sectional view of the battery air leakage structure in the third embodiment.
[0024] Explanation of the reference numerals in the specification drawings: 1. Housing; 2. Electrode member; 3. Terminal post; 4. Safety valve; 5. Support plate; 6. Top block; 7. Elastic member; 11. Top plate; 12. Second connecting portion; 21. Mounting plate; 41. First connecting portion; 42. Bending portion; 51. Fixing member; 71. Connecting plate. Specific embodiments
[0025] The following further describes the present invention in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the examples given are not intended to limit the present invention.
[0026] Refer to Figure 1 As shown, a battery air leakage structure of the present invention includes: a safety valve 4, the safety valve 4 is connected to the housing 1 and penetrates through the housing 1, and the safety valve 4 includes a weak position; a support member, the support member is connected to the electrode member 2, the electrode member 2 is located inside the housing 1 and is connected to the housing 1, the support member is located between the safety valve 4 and the electrode member 2, and the support member can abut against the safety valve 4.
[0027] For a battery air leakage structure of this embodiment, by arranging a support member between the safety valve 4 and the electrode member 2, when the electrode member 2 expands or moves inside, the support member can squeeze the safety valve 4. When the support member damages the weak position of the safety valve 4, the safety valve 4 leaks air. At the same time, when the internal pressure of the housing 1 reaches the air leakage value of the safety valve 4, the weak position of the safety valve 4 can also be damaged to leak air, so that the battery air leakage structure can leak air when the internal pressure of the housing 1 is too high, the electrode member 2 expands too much, or the electrode member 2 moves too far inside the housing 1.
[0028] Refer to Figure 2 and Figure 3 As shown, the battery includes a housing 1 and an electrode member 2 located inside the housing 1. The electrode member 2 is located inside the housing 1 and is connected to the housing 1. The housing 1 includes a top plate 11, a terminal post 3 is connected to the top plate 11, one end of the terminal post 3 is used for connection with the outside, and the other end is connected to the electrode member 2.
[0029] The safety valve 4 is connected to the top plate 11. Preferably, the safety valve 4 is connected to the central position of the top plate 11. The safety valve 4 is connected to the top plate 11 of the housing 1 and penetrates through the housing 1. The safety valve 4 includes a weak position. The safety valve 4 includes a first connecting portion 41 and a bending portion 42. The bending portion 42 is integrally arc-shaped and protrudes towards the inside of the housing 1. The first connecting portion 41 is arranged along the edge of the bending portion 42 and surrounds the bending portion 42 for one week. The top plate 11 is provided with a mounting hole for mounting the safety valve 4. The edge of the mounting hole is provided with a second connecting portion 12. The first connecting portion 41 is connected to the second connecting portion 12, so that the safety valve 4 is fixedly connected to the housing 1. Specifically, the first connecting portion 41 and the second connecting portion 12 can be connected by welding. The weak position includes a first weak position and a second weak position. The first weak position is located at the connection position between the bending portion 42 and the first connecting portion 41. The second weak position is located at the connection position between the second connecting portion 12 and the first connecting portion 41 on the housing 1.
[0030] The support member is connected to the electrode member 2, and the support member is located between the safety valve 4 and the electrode member 2. The support member can abut against the safety valve 4. Specifically, the top of the electrode member 2 includes a mounting plate 21, and the support member is connected to the mounting plate 21.
[0031] Embodiment 1
[0032] Refer to Figure 1 、 Figure 4 and Figure 5 As shown, the support member includes a support plate 5 that abuts against the weak position. One end of the support plate 5 away from the safety valve 4 is connected to the electrode member 2. Preferably, a plurality of air holes are provided on the support plate 5. The air holes are used for the gas flow between the two sides of the support plate 5, so as to prevent the situation that the air pressures on the two sides of the support plate 5 are different, which affects the air release of the safety valve 4.
[0033] There are two support plates 5 that abut against the first weak position. The two support plates 5 are symmetrically arranged with the perpendicular line from the midpoint of the safety valve 4 to the mounting plate 21 on the electrode member 2 as the symmetry axis. The distance between the connection positions of the two support plates 5 and the electrode member 2 is greater than the distance between the connection positions of the two support plates 5 and the safety valve 4, so that the cross-sections of the two support plates 5, the electrode member 2 and the safety valve 4 form an approximate trapezoid. In another embodiment, there is a gap between one end of the support plate 5 close to the first weak position and the first weak position. By adjusting the size of the gap, the purpose of adjusting the expansion and movement limit positions of the electrode member 2 when the safety valve 4 releases air is achieved.
[0034] In another embodiment, two support plates 5 are provided and abutted against the second weak position. The two support plates 5 are symmetrically arranged with the perpendicular line from the midpoint of the safety valve 4 to the mounting plate 21 on the electrode member 2 as the axis of symmetry. The ends of the two support plates 5 away from the safety valve 4 are connected to each other, so that the two support plates 5 form a V shape. The electrode member 2 is connected with a fixing member 51. A clamping groove is provided on the side of the fixing member 51 close to the safety valve 4. The two support plates 5 are clamped with the clamping groove, so that the two support plates 5 are relatively fixed to the electrode member 2. In another embodiment, there is a gap between the end of the support plate 5 close to the second weak position and the second weak position. By adjusting the size of the gap, the purpose of adjusting the expansion and movement limit position of the electrode member 2 when the safety valve 4 discharges air can be achieved.
[0035] When the electrode member 2 expands or moves internally, the support plate 5 can squeeze the first weak position or the second weak position. When the weak position of the safety valve 4 is damaged by the support member, the safety valve 4 discharges air.
[0036] Embodiment 2
[0037] Refer to Figure 6 As shown, the support member includes a top block 6. The top block 6 is connected to the electrode member 2. There is a gap between the side of the top block 6 close to the safety valve 4 and the safety valve 4, and the position of the top block 6 corresponds to that of the bending part 42. When the electrode member 2 expands or moves internally, the top block 6 can squeeze the middle position of the bending part 42, so as to apply pressure to the first weak position. When the first weak position is damaged, the safety valve 4 discharges air.
[0038] Embodiment 3
[0039] Refer to Figure 7As shown in the figure, the support member includes an elastic member 7. The elastic member 7 can be regarded as a spring. One end of the elastic member 7 is connected to the electrode member 2, and the other end abuts against the bent portion 42 of the safety valve 4. By replacing different elastic members 7, the pressure exerted on the bent portion 42 during the expansion or movement of the electrode member 2 can be adjusted, thereby achieving the purpose of adjusting the expansion and movement limit positions of the electrode member 2 when the safety valve 4 discharges air. Preferably, a connecting plate 71 is connected to the end of the elastic member 7 away from the electrode member 2, and the connecting plate 71 abuts against the safety valve 4. Since the abutting area between the elastic member 7 and the bent portion 42 is small, the end of the elastic member 7 may be separated from the bent portion 42 when the battery shakes. The setting of the connecting plate 71 can increase the abutting area between the end of the elastic member 7 and the bent portion 42, and the connecting plate 71 can also abut against the bent portion 42 when the battery shakes. Preferably, at least two elastic members 7 are provided, and the elastic members 7 are symmetrically arranged with the perpendicular line from the midpoint of the safety valve 4 to the mounting plate 21 on the electrode member 2 as the symmetry axis. The provision of multiple elastic members 7 makes the position of the connecting plate 71 more stable, and the shaking amplitude of the connecting plate 71 is smaller when the battery shakes. When the electrode member 2 expands or moves inside, the connecting plate 71 squeezes the bent portion 42 through the elastic member 7, thereby applying pressure to the first weak position. When the first weak position is damaged, the safety valve 4 discharges air.
[0040] A battery air discharge structure of the present utility model, by providing a support member between the safety valve 4 and the electrode member 2, the support member can squeeze the safety valve 4 when the electrode member 2 expands or moves inside. When the support member damages the weak position of the safety valve 4, the safety valve 4 discharges air. At the same time, when the internal pressure of the housing 1 reaches the air discharge value of the safety valve 4, the weak position of the safety valve 4 can also be damaged to discharge air, so that the battery air discharge structure can discharge air when the internal pressure of the housing 1 is too high, the electrode member 2 expands too much, or the electrode member 2 moves too far inside the housing 1.
[0041] Obviously, the above embodiments are merely examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creation of the present utility model.
Claims
1. A battery deflation structure, characterized in that: include: A safety valve, the safety valve is connected to the housing and passes through the housing, the safety valve comprises a weak position, a first connecting portion and a bent portion, the weak position comprises a first weak position and a second weak position, the first connecting portion is located at the edge of the bent portion, the first weak position is located at the connecting position between the bent portion and the first connecting portion, the first connecting portion is connected to the housing, and the second weak position is located at the connecting position between the housing and the first connecting portion; A support member, wherein the support member is connected to the electrode member, the electrode member is located in the shell and connected to the shell, the support member is located between the safety valve and the electrode member, and the support member can be against the safety valve.
2. The battery deflation structure according to claim 1, characterized in that: The support member comprises a support plate abutting against the weak position, and one end of the support plate away from the safety valve is connected to the electrode member.
3. The battery deflation structure according to claim 2, characterized in that: The support plates are provided with two and are against the first weak position, the two support plates are symmetrically arranged, and the distance between the two support plates and the connection position of the electrode member is greater than the distance between the two support plates and the connection position of the safety valve.
4. The battery deflation structure according to claim 2, characterized in that: The support plates are provided with two and are against the second weak position, the two support plates are symmetrically arranged, and the ends of the two support plates away from the safety valve are connected to each other, the electrode member is connected to a fixing member, the fixing member is provided with a slot, and the two support plates are clamped in the slot.
5. The battery deflation structure according to claim 2, characterized in that: The support plate is provided with a plurality of air holes.
6. The battery deflation structure according to claim 1, characterized in that: The support member includes a top block, the top block is connected to the electrode member, and a gap exists between a side of the top block close to the safety valve and the safety valve.
7. The battery deflation structure according to claim 1, characterized in that: The support member includes an elastic member, one end of which is connected to the electrode member, and the other end of which is against the safety valve.
8. The battery deflation structure according to claim 7, characterized in that: One end of the elastic member away from the electrode member is connected with a connecting plate, and the connecting plate abuts against the safety valve.
9. The battery deflation structure according to claim 8, characterized in that: There are at least two elastic members which are symmetrically arranged.