Explosion-proof flame-retardant lithium battery
By incorporating a flame-retardant and heat-insulating structure consisting of a positioning partition, rock wool board, and ceramic fiber board within the lithium battery casing, and designing arc-shaped grooves for pressure relief on the outer wall, the problem of flame retardancy caused by short circuits in lithium batteries is solved, thus improving the safety of lithium batteries.
Patent Information
- Application Number
- CN202422010309.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-08-19
AI Technical Summary
Existing lithium batteries are prone to short circuits that can generate flames during use, and they cannot be effectively flame-retarded, leading to safety hazards, especially in electric vehicles where there is a risk of complete scrapping.
It adopts a lithium battery box base and top cover design, with internal positioning partitions and positioning slots, combined with a flame-retardant and heat-insulating structure of rock wool board and ceramic fiber board, and arc-shaped grooves on the outer wall for pressure relief. It is easy to assemble through guide strips and guide surfaces.
It achieves explosion-proof and flame-retardant functions for lithium batteries, improves safety performance, avoids explosions caused by excessive internal pressure, and enhances the safety of lithium batteries.
Smart Images
Figure CN223665543U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to lithium battery safety structure technical field especially relates to a sealed explosion -proof flame -retardant lithium battery. BACKGROUND
[0002] Lithium battery is a kind of lithium metal or lithium alloy as positive / negative electrode material, using non-aqueous electrolyte solution battery. The existing lithium battery is applied in the field such as electric vehicle, and the power source of electric vehicle is mostly a plurality of battery packs in series in a metal or alloy box body, the existing lithium battery usually does not have flame -retardant function in the use process, when lithium battery short circuit produces flame, cannot be blocked and flame -retardant treatment to flame, to easily produce security risk, easily makes electric equipment, for example, electric vehicle is scrapped as a whole, therefore obtains a kind of explosion -proof flame -retardant lithium battery is very important. SUMMARY
[0003] To solve the above at least one technical problem, the utility model provides a kind of explosion -proof flame -retardant lithium battery, including lithium battery box body base and with lithium battery box body base cooperation lithium battery box body upper cover, at least one positioning baffle is equipped on the inner wall of the lithium battery box body base, the bottom of the lithium battery box body base is equipped with at least one first positioning slot, the second positioning slot that is cooperated with first positioning slot is opened in the lithium battery box body upper cover, lithium battery two ends are placed in first positioning slot and second positioning slot respectively, the third positioning slot for passing through and limiting lithium battery is opened in the positioning baffle;
[0004] At least part of the inner side wall of the lithium battery box body base is fixed with rock wool board, and the inner side wall of the rock wool board is riveted with ceramic fiber plate.
[0005] The outer wall of the lithium battery box body base is provided with an arc-shaped notch, and the depth of the arc-shaped notch is gradually reduced from the middle to the two ends.
[0006] Through the above technical scheme, the setting of rock wool board and ceramic fiber plate can play the functions of flame retardation and heat insulation, and the arc-shaped notch can be broken in a small range to play a pressure relief role when the internal temperature rises and the gas expands, instead of the explosion of the whole lithium battery box body.
[0007] As the above preferred mode, the two sides of the third positioning slot are fixed with first guide strips, and the first guide strips are provided with first guide surfaces.
[0008] Through the above technical scheme, the setting of first guide strip and first guide surface can help the positioning insertion of lithium battery, and facilitate assembly. Since the positioning baffle is provided, the heat dissipation effect is better than that of the conventional installation slot directly opened on the box body base, and the box body will not change its structure due to the expansion of lithium battery after heating.
[0009] As one of the preferred modes, the second positioning slot is fixed with a second guide strip on both sides, and a second guide surface is formed on the second guide strip.
[0010] Through the above technical scheme, the second guide surface can facilitate the installation of the lithium battery box upper cover and the insertion of the end of the lithium battery.
[0011] As one of the preferred modes, the lithium battery box upper cover is fixed by fasteners after being inserted with the lithium battery box base.
[0012] As one of the preferred modes, the arc-shaped notch is a circular triangle, and the deepest part is at the end angle of the circular triangle at the symmetry axis of the arc-shaped notch.
[0013] Through the above technical scheme, the arc-shaped notch can be orderly broken from the middle to both sides.
[0014] Compared with the prior art, the utility model has the advantages that the utility model is simple in structure, solves the problem that high temperature is easily generated inside the lithium battery, the internal pressure of the battery pack is much greater than the external environmental pressure, a pressure difference is generated, if the pressure cannot be rapidly discharged at this time, an explosion will occur in turn, a safety accident is caused, the function of ventilation and air release is achieved, and the safety performance of the lithium battery is improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a sectional view of the utility model;
[0016] Reference signs:
[0017] 101 lithium battery box base; 1011 first positioning slot; 102 lithium battery box upper cover; 1021 second positioning slot; 1022 second guide strip; 1023 second guide surface;
[0018] 2 positioning partition plate; 201 third positioning through slot; 202 first guide strip; 203 first guide surface;
[0019] 301 rock wool board; 302 ceramic fiber board; 303 arc-shaped notch. DETAILED DESCRIPTION
[0020] In order to make the person skilled in the art better understand the utility model, so that the scope of protection of the utility model is more clearly limited, the utility model is described in detail below according to some specific embodiments of the utility model. It should be noted that the following is only some specific embodiments of the concept of the utility model, and is only a part of the embodiments of the utility model, and the specific and direct description of the related structure is only for the convenience of understanding the utility model, and each specific feature does not directly limit the scope of the utility model.
[0021] Referring to the drawings, the utility model adopts the following technical scheme, a kind of explosion-proof flame-retardant lithium battery, including lithium battery box body base 101 and with the lithium battery box body base 101 cooperation lithium battery box body upper cover 102, at least one positioning baffle 2 is fixed on the inner wall of the lithium battery box body base 101, the bottom of the lithium battery box body base 101 is equipped with at least one first positioning slot 1011, the second positioning slot 1021 that is cooperated with first positioning slot 1011 is opened in the lithium battery box body upper cover 102, lithium battery two ends are placed in first positioning slot 1011 and second positioning slot 1021 respectively, the third positioning slot 201 for lithium battery to pass through and limit is opened in the positioning baffle 2;
[0022] At least part of the inner side wall of the lithium battery box body base 101 is fixed with rock wool board 301, and the inner side wall of the rock wool board 301 is riveted with ceramic fiber plate 302.
[0023] Arc-shaped notches 303 are opened on the outer wall of the lithium battery box body base 101, and the depth of the arc-shaped notches 303 is gradually reduced from the middle to the two ends.
[0024] Through the above technical scheme, the setting of rock wool board 301 and ceramic fiber plate 302 can play the functions of flame-retardant and heat insulation, and the setting of arc-shaped notches 303 can cause pressure relief in a small range by breaking when the internal temperature rises and the gas expands, instead of the explosion of the whole lithium battery box body.
[0025] As one of the preferred modes, the two sides of the third positioning slot 201 are fixed with first guide strips 202, and the first guide strips 202 are provided with first guide surfaces 203.
[0026] Through the above technical scheme, the setting of first guide strips 202 and first guide surfaces 203 can help the positioning insertion of lithium battery, and facilitate assembly. Compared with the traditional installation slot directly opened on the box body base, the setting of positioning baffle 2 can achieve better heat dissipation effect, and the box body will not change its structure due to the expansion of lithium battery after heating.
[0027] As one of the preferred modes, the two sides of the second positioning slot 1021 are fixed with second guide strips 1022, and the second guide strips 1022 are provided with second guide surfaces 1023.
[0028] Through the above technical scheme, the setting of second guide surfaces 1023 can facilitate the installation of lithium battery box body upper cover 102, and facilitate the insertion of the end of lithium battery.
[0029] As one of the preferred modes, the lithium battery box body upper cover 102 is fixed by fasteners after being inserted with the lithium battery box body base 101.
[0030] As one of the above preferred modes, the arc-shaped notch 303 is a circular triangle, and the deepest part is the end angle of the circular triangle at the symmetry axis of the arc-shaped notch 303.
[0031] Through the above technical scheme, the setting of the arc-shaped notch 303 can facilitate the orderly explosion of the arc-shaped notch 303 from the middle to both sides.
[0032] Compared with the prior art, the utility model has the advantages that: the utility model has simple structure, solves the problem that high temperature is easily generated in the lithium battery, the internal pressure of the battery pack is far greater than the external environmental pressure, a pressure difference is generated, if the pressure cannot be rapidly discharged at this time, then explosion will occur, and a safety accident is caused, achieves the function of ventilation and air release, and improves the safety performance of the lithium battery.
[0033] In the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0034] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.
Claims
1. An explosion-proof and flame-retardant lithium battery, characterized in that: The battery includes a lithium battery housing base (101) and a lithium battery housing cover (102) that cooperates with the lithium battery housing base (101). The inner wall of the lithium battery housing base (101) is provided with at least one positioning partition (2). The bottom of the lithium battery housing base (101) is provided with at least one first positioning slot (1011). The lithium battery housing cover (102) is provided with a second positioning slot (1021) that cooperates with the first positioning slot (1011). The two ends of the lithium battery are respectively placed in the first positioning slot (1011) and the second positioning slot (1021). The positioning partition (2) is provided with a third positioning through groove (201) for the lithium battery to pass through and limit its movement. At least a portion of the inner wall of the lithium battery box base (101) is fixed with a rock wool board (301), and a ceramic fiber board (302) is riveted to the inner wall of the rock wool board (301). The outer wall of the lithium battery housing base (101) is provided with an arc-shaped groove (303), and the depth of the arc-shaped groove (303) is set from deep to shallow from the middle to both ends.
2. The explosion-proof and flame-retardant lithium battery according to claim 1, characterized in that: The third positioning groove (201) is fixed with a first guide strip (202) on both sides, and a first guide surface (203) is provided on the first guide strip (202).
3. The explosion-proof and flame-retardant lithium battery according to claim 1, characterized in that: The second positioning slot (1021) is fixed with a second guide bar (1022) on both sides, and a second guide surface (1023) is provided on the second guide bar (1022).
4. The explosion-proof and flame-retardant lithium battery according to claim 1, characterized in that: The lithium battery box cover (102) is inserted into the lithium battery box base (101) and then fixed by fasteners.
5. The explosion-proof and flame-retardant lithium battery according to claim 1, characterized in that: The arc-shaped notch (303) is a part of a round triangle, and the deepest part is the corner of the round triangle at the axis of symmetry of the arc-shaped notch (303).