Explosion-proof device for battery module and battery module
By providing a membrane body and a support part on the connecting part and opening part of the explosion-proof device of the battery module, the problem of poor deformation resistance strength of the explosion-proof plate is solved, and the safety performance of the battery module is improved.
Patent Information
- Application Number
- CN202420971638.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing battery module explosion-proof plate has poor resistance to deformation and is prone to deformation, resulting in a reduction in the age of explosion-proof plate rupture and reducing the safety performance of the battery module.
An explosion-proof device for a battery module is designed, including a top cover, an explosion-proof plate and a membrane body. By providing two sets of membrane bodies and support parts on the connecting part, the connection part and the opening part are reinforced to improve the deformation resistance of the explosion-proof plate.
By reinforcing the connection and opening parts, deformation caused by changes in the internal pressure of the battery module is reduced, and the deformation resistance strength of the explosion-proof plate is improved, thereby improving the safety performance of the battery module.
Smart Images
Figure CN222720602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery safety, in particular to an explosion-proof device for a battery module and a battery module. Background Art
[0002] As modern society enters the electronic age, the variety of electromechanical products and electronic equipment in modern society is increasing and the quantity is becoming increasingly huge. As a key component for energy storage and supply, the safety of battery modules is increasingly valued.
[0003] At present, most battery modules are designed with an explosion-proof valve and an explosion-proof plate installed in the explosion-proof valve. When the pressure inside the shell exceeds the pressure value of the explosion-proof plate, the explosion-proof plate will crack and the gas in the shell will leak out. However, the existing explosion-proof plate has poor deformation resistance. Due to the pressure changes inside the battery module, the explosion-proof plate is prone to deformation, which can easily cause the explosion-proof plate to rupture and reduce the safety performance of the battery module.
[0004] Therefore, there is an urgent need for an explosion-proof device for a battery module and a battery module to solve the above problems. Utility Model Content
[0005] Based on the above, the purpose of the utility model is to provide an explosion-proof device and a battery module for a battery module to solve the problem that the existing explosion-proof pieces have poor anti-deformation strength, are easy to deform, and are prone to rupture over time.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] An explosion-proof device for a battery module comprises a top cover, an explosion-proof plate and a membrane body; the explosion-proof plate is arranged at the center of the top cover, and the explosion-proof plate comprises a fixed part and an opening part, the fixed part is connected to the top cover, and the opening part is connected to the fixed part; a connecting part is formed between the fixed part and the opening part; the membrane body is divided into two groups, and the membrane body is arranged on the connecting part; a supporting part extending outward is provided on the side of the membrane body away from the fixed part.
[0008] As a preferred solution for the explosion-proof device for the battery module, the two groups of membrane bodies are respectively distributed on the connecting part up and down, and are in conflict with the connecting part; the membrane body is connected to the supporting part; the supporting part is arranged at the top and bottom ends of the opening part, and is in conflict with one end of the opening part close to the fixed part.
[0009] As a preferred solution for the explosion-proof device for the battery module, a first groove which is recessed downward is provided at the top of the connecting part; a second groove which is recessed upward is provided at the bottom of the connecting part; the first groove and the second groove are arranged on the connecting part opposite to each other.
[0010] As a preferred solution for the explosion-proof device for the battery module, the first groove, the second groove and the connecting portion form a first notch; and the film body is located outside the first notch.
[0011] As a preferred solution for the explosion-proof device for the battery module, the opening portion includes multiple groups of rupture blocks; the rupture blocks are connected to the connecting portion at one end close to the fixing portion; and two adjacent groups of rupture blocks are connected in pairs at one end away from the fixing portion.
[0012] As a preferred solution for the explosion-proof device for the battery module, a third groove and a fourth groove are provided between two adjacent groups of the rupture blocks; and a second notch is formed between the third groove, the fourth groove and the rupture block.
[0013] As a preferred solution for the explosion-proof device for the battery module, the bottom end of the third groove is lower than the top end of the third groove; the bottom end of the fourth groove is lower than the top end of the fourth groove.
[0014] As a preferred solution of the explosion-proof device for the battery module, the first notch is connected to the second notch, and the thickness of the first notch is greater than the thickness of the second notch.
[0015] As a preferred solution for the explosion-proof device for the battery module, two groups of support frames are provided on the top cover; the two groups of support frames are provided on the top cover and are located on both sides of the explosion-proof plate; an alarm is provided on the outside of the support frame; a telescopic rod is provided on the support frame; a pressure sensor is provided on the telescopic rod, and the pressure sensor is located above the opening portion; a spring is provided between the support frame and the pressure sensor, and the spring is sleeved on the outside of the telescopic rod; the pressure sensor is electrically connected to the alarm.
[0016] The beneficial effects of the utility model are:
[0017] By setting up two groups of membrane bodies and support parts, and by connecting the membrane bodies on the top and bottom surfaces of the connecting part respectively, the connecting part can be reinforced, and a support part is set on the outside of the membrane body, and the top and bottom surfaces of the opening part are reinforced by the two groups of support parts respectively, thereby reducing the deformation of the opening part due to the change of internal pressure of the battery module, improving the deformation resistance of the explosion-proof plate, and thereby improving the safety performance of the battery module.
[0018] A battery module comprises a battery body and the explosion-proof device for the battery module; the explosion-proof device for the battery module is arranged above the battery body and is detachably connected to the battery body. Since the battery module adopts the explosion-proof device for the battery module, the anti-deformation strength of the explosion-proof sheet is improved, thereby improving the safety performance of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1A schematic diagram of the top structure of the explosion-proof disk provided by the utility model;
[0020] Figure 2 A schematic diagram of the internal structure of the explosion-proof disk provided by the utility model;
[0021] Figure 3 A schematic diagram of the top structure of the explosion-proof device for the battery module provided by the utility model;
[0022] Figure 4 This is a schematic diagram of the internal structure of the explosion-proof device for the battery module provided by the utility model.
[0023] Among them, the reference numerals in the figure are:
[0024] 10. Top cover; 20. Explosion-proof disk; 21. Fixing part; 22. Opening part; 221. Rupture block; 23. Connecting part; 24. First groove; 25. Second groove; 26. Third groove; 27. Fourth groove; 30. Membrane; 31. Support part; 41. Support frame; 42. Alarm; 43. Pressure sensor; 44. Telescopic rod; 45. Spring. DETAILED DESCRIPTION
[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0028] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present utility model.
[0029] In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more than two. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0030] In one embodiment of the present invention, Figure 1-4 As shown, an explosion-proof device for a battery module is provided, comprising a top cover 10, an explosion-proof sheet 20 and a membrane body 30. The explosion-proof sheet 20 is arranged in the center of the top cover 10, and the explosion-proof sheet 20 comprises a fixed portion 21 and an opening portion 22, wherein the fixed portion 21 is connected to the top cover 10, and the opening portion 22 is connected to the fixed portion 21. A connecting portion 23 is formed between the fixed portion 21 and the opening portion 22. The membrane body 30 is divided into two groups, and the membrane body 30 is arranged on the connecting portion 23. A supporting portion 31 extending outward is provided on one side of the membrane body 30 away from the fixed portion 21.
[0031] By providing two groups of membrane bodies 30 and support portions 31, and by connecting the membrane bodies 30 to the top and bottom surfaces of the connection portion 23 respectively, the connection portion 23 can be reinforced, and a support portion 31 is provided on the outside of the membrane body 30, and the top and bottom surfaces of the opening portion 22 are reinforced by the two groups of support portions 31 respectively, thereby reducing the deformation of the opening portion 22 due to the change in the internal pressure of the battery module, improving the anti-deformation strength of the explosion-proof plate 20, and thereby improving the safety performance of the battery module.
[0032] Preferably, the two groups of membrane bodies 30 are respectively distributed on the connecting portion 23 up and down, and conflict with the connecting portion 23. The membrane body 30 is connected to the support portion 31. The support portion 31 is provided at the top and bottom ends of the opening portion 22, and conflicts with one end of the opening portion 22 close to the fixing portion 21. The top and bottom surfaces of the connecting portion 23 are reinforced by the membrane body 30, and the top and bottom surfaces of the opening portion 22 are reinforced by the two groups of support portions 31, so as to reduce the deformation of the opening portion 22 due to the change of the internal pressure of the battery module, improve the anti-deformation strength of the explosion-proof plate 20, and thus improve the safety performance of the battery module.
[0033] Preferably, a first groove 24 that is concave downward is provided at the top of the connecting portion 23. A second groove 25 that is concave upward is provided at the bottom of the connecting portion 23. The first groove 24 and the second groove 25 are arranged on the connecting portion 23 in a relative manner. The first groove 24 and the second groove 25 can be a V-shaped structure or a trapezoidal structure. By providing the first groove 24 and the second groove 25, it is prevented from falling off when the opening portion 22 is rolled up, thereby ensuring that the opening portion 22 does not cause damage to the surrounding environment during the opening process.
[0034] Furthermore, the first groove 24, the second groove 25 and the connecting portion 23 form a first notch. The membrane body 30 is located outside the first notch. By providing the first notch, the opening portion 22 can be turned toward the fixing portion 21 under the action of the first notch, thereby preventing the opening portion 22 from falling off when it is turned over, thereby ensuring that the opening portion 22 does not cause damage to the surrounding environment during the opening process.
[0035] Specifically, the opening portion 22 includes a plurality of groups of rupture blocks 221. One end of the rupture blocks 221 close to the fixing portion 21 is connected to the connecting portion 23. Two adjacent groups of rupture blocks 221 are connected in pairs at one end away from the fixing portion 21. When the battery pressure is greater than the bearing pressure of the opening portion 22, the rupture blocks 221 inside the opening portion 22 are turned up toward the fixing portion 21 under the action of the first notch, so as to avoid the rupture blocks 221 from falling off when turning over, thereby ensuring that the rupture blocks 221 will not cause damage to the surrounding environment during the opening process.
[0036] Furthermore, a third groove 26 and a fourth groove 27 are provided between two adjacent groups of rupture blocks 221. A second notch is formed between the third groove 26, the fourth groove 27 and the rupture block 221. The third groove 26 and the fourth groove 27 can be a V-shaped structure or a trapezoidal structure. Due to the size limitation of the second notch, the rolling height of the rupture block 221 is subject to a certain limitation when the rupture block 221 rolls up, so as to prevent the rupture block 221 from falling off due to over-rolling.
[0037] A slot is provided between the support portion 31 and the second notch. The slot can prevent the rupture block 221 from being restricted by the support portion 31 when rolling up, thereby improving the pressure relief capability of the explosion-proof disk 20 .
[0038] Furthermore, the bottom end of the third groove 26 is lower than the top end of the third groove 26. The bottom end of the fourth groove 27 is lower than the top end of the fourth groove 27. The bottom end of the third groove 26 and the bottom end of the fourth groove 27 are both the lowest ends of the connection between two adjacent groups of rupture blocks 221, and the top end of the third groove 26 and the top end of the fourth groove 27 are the highest ends of the connection between two adjacent groups of rupture blocks 221. Through the third groove 26 and the fourth groove 27, the thickness between the two adjacent groups of rupture blocks 221 has a weak point, which facilitates the tearing of the two adjacent groups of rupture blocks 221, thereby improving the safety performance of the battery module.
[0039] Furthermore, the first notch is connected to the second notch, and the thickness of the first notch is greater than the thickness of the second notch. By connecting the first notch to the second notch, a continuous protective layer can be formed, making the explosion-proof disk 20 more solid and stable.
[0040] Preferably, two groups of support frames 41 are provided on the top cover 10. The two groups of support frames 41 are provided on the top cover 10 and are located on both sides of the explosion-proof disc 20. An alarm 42 is provided on the outside of the support frame 41. A telescopic rod 44 is provided on the support frame 41. A pressure sensor 43 is provided on the telescopic rod 44, and the pressure sensor 43 is located above the opening portion 22. A spring 45 is provided between the support frame 41 and the pressure sensor 43, and the spring 45 is sleeved on the outside of the telescopic rod 44. The pressure sensor 43 is electrically connected to the alarm 42. By providing the pressure sensor 43 and the alarm 42, when the explosion-proof disc 20 ruptures, the broken block on the explosion-proof disc 20 drives the pressure sensor 43 to move upward under the action of the telescopic rod 44 and the spring 45, and the pressure sensor 43 detects the pressure intensity at this moment. If the pressure intensity is greater than the preset value, the alarm 42 will sound an alarm to remind the staff to dodge, thereby improving the safety performance of the battery module.
[0041] In one embodiment of the present invention, Figure 1-4 As shown, a battery module is provided, including a battery body (not shown) and the above-mentioned explosion-proof device for the battery module. The explosion-proof device for the battery module is arranged above the battery body and is detachably connected to the battery body, which facilitates the disassembly between the battery body and the explosion-proof device for the battery module, thereby improving the replacement efficiency of the battery module. Since the battery module adopts the above-mentioned explosion-proof device for the battery module, the anti-deformation strength of the explosion-proof sheet 20 is improved, thereby improving the safety performance of the battery module.
[0042] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.
Claims
1. An explosion-proof device for a battery module, characterized in that: include: Top cover; An explosion-proof piece, the explosion-proof piece is arranged in the center of the top cover, the explosion-proof piece comprises a fixed part and an opening part, the fixed part is connected to the top cover, the opening part is connected to the fixed part; a connecting part is formed between the fixed part and the opening part; The membrane body is divided into two groups and is arranged on the connecting part; a supporting part extending outward is arranged on one side of the membrane body away from the fixing part.
2. The explosion-proof device for a battery module according to claim 1, characterized in that: The two groups of membranes are respectively distributed on the connecting part up and down and conflict with the connecting part; the membrane is connected to the supporting part; the supporting part is arranged at the top and bottom ends of the opening part and conflicts with one end of the opening part close to the fixing part.
3. The explosion-proof device for a battery module according to claim 1, characterized in that: A first groove which is concave downward is provided at the top of the connecting part; a second groove which is concave upward is provided at the bottom of the connecting part; the first groove and the second groove are arranged on the connecting part opposite to each other.
4. The explosion-proof device for a battery module according to claim 3, characterized in that: The first groove, the second groove and the connecting portion form a first notch; the film body is located outside the first notch.
5. The explosion-proof device for a battery module according to claim 4, characterized in that: The opening portion comprises a plurality of groups of rupture blocks; one end of the rupture blocks close to the fixing portion is connected to the connecting portion; and two adjacent groups of rupture blocks are connected in pairs at one end away from the fixing portion.
6. The explosion-proof device for a battery module according to claim 5, characterized in that: A third groove and a fourth groove are provided between two adjacent groups of the rupture blocks; a second notch is formed between the third groove, the fourth groove and the rupture block.
7. The explosion-proof device for a battery module according to claim 6, characterized in that: The bottom end of the third groove is lower than the top end of the third groove; the bottom end of the fourth groove is lower than the top end of the fourth groove.
8. The explosion-proof device for a battery module according to claim 7, characterized in that: The first notch is connected to the second notch, and the thickness of the first notch is greater than the thickness of the second notch.
9. The explosion-proof device for a battery module according to claim 1, characterized in that: Two groups of support frames are provided on the top cover; the two groups of support frames are provided on the top cover and are located on both sides of the explosion-proof plate; an alarm is provided on the outside of the support frame; a telescopic rod is provided on the support frame; a pressure sensor is provided on the telescopic rod, and the pressure sensor is located above the opening part; a spring is provided between the support frame and the pressure sensor, and the spring is sleeved on the outside of the telescopic rod; the pressure sensor is electrically connected to the alarm.
10. A battery module, characterized in that: It comprises a battery body and an explosion-proof device for a battery module as claimed in any one of claims 1 to 9; the explosion-proof device for the battery module is arranged above the battery body and is detachably connected to the battery body.