Explosion-proof lithium battery

Abstract

The utility model discloses an anti-explosion lithium battery which comprises a shell, a containing groove used for containing the lithium battery is formed in the shell, a bottom cover is arranged at the bottom of the shell, the top of the shell is connected with a top cover through a bolt, the inner circumferential wall of the shell is sunken outwards to form a sunken groove, and the sunken groove is connected with the shell through a bolt. The height of the sunken groove is smaller than that of the lithium battery, and the center of the top cover is in threaded connection with a cable gland. The lithium battery has the beneficial effects that the sunken groove and the groove are designed, so that gas generated by combustion of the lithium battery is buffered, the pressure intensity is reduced, and the probability of explosion is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of lithium batteries, and particularly relates to an explosion-proof lithium battery. Background Art

[0002] During the use of lithium batteries, faults may occur, leading to combustion or other situations, and it is also possible to explode. Without protective measures, not only will the lithium battery be damaged, but other components are also likely to be damaged as a result. Content of the Utility Model

[0003] The purpose of the utility model is to provide an explosion-proof lithium battery.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] An explosion-proof lithium battery includes a housing. An accommodation groove for accommodating the lithium battery is provided inside the housing. A bottom cover is provided at the bottom of the housing. The top of the housing is connected to a top cover by bolts. A concave groove is formed by the inner peripheral wall of the housing being recessed outward. The height of the concave groove is less than the height of the lithium battery. A gland is threadedly connected to the center of the top cover.

[0006] Preferably, the height of the housing is greater than the height of the lithium battery, and a groove is formed above the lithium battery. A pressing member is provided in the groove. The pressing member includes a pressing plate in contact with the top surface of the battery and a clamping plate integrally formed with the pressing plate. A clamping groove adapted to the clamping plate is provided on the bottom surface of the top cover.

[0007] Preferably, the clamping plate is closely attached to the inner peripheral wall of the housing. A strip-shaped groove penetrating the thickness direction of the clamping plate is provided on the clamping plate. The length direction of the strip-shaped groove is the same as the height direction of the battery. A threaded groove corresponding to the strip-shaped groove is provided on the inner peripheral wall of the housing.

[0008] Preferably, a convex ring corresponding to the concave groove is formed by the top surface of the bottom cover protruding upward. The outer peripheral wall of the bottom cover is connected to the bottom surface of the housing by an adhesive method.

[0009] Preferably, a convex ring corresponding to the concave groove is formed by the top surface of the bottom cover protruding upward. Threaded lines are provided on the outer peripheral wall of the convex ring. A threaded groove corresponding to the convex ring is provided on the inner peripheral wall of the housing.

[0010] Preferably, the volume of the battery is more than 20% of the sum of the accommodation groove and the concave groove.

[0011] The beneficial effects of the present utility model are as follows: The lithium battery is fixed by the pressing plate, so that it remains stable and is not prone to shaking. When the lithium battery fails and causes combustion or other situations, the concave grooves and grooves inside the housing play a buffering role for the gas generated by combustion. Under the condition of generating the same volume of gas, due to the certain space inside this structure, the overall pressure is reduced, and it is not prone to explosion. At the same time, because the internal space of the housing is in a closed state and the oxygen content is limited, it can also play a role in suppressing combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model.

[0013] Figure 2 is Figure 1 a cross-sectional view taken along line A-A in

[0014] Wherein: housing 10, bottom cover 12, top cover 14, lithium battery 16, concave groove 18, groove 20, pressing plate 22, clamping plate 24, bolt 26, gland 28. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The technical solutions of this patent will be further described in detail below in conjunction with the specific embodiments.

[0016] Embodiment 1: As shown in Figure 1 and Figure 2 a kind of explosion-proof lithium battery of the present utility model includes a housing 10. An accommodation groove for accommodating the lithium battery 16 is provided inside the housing 10. A bottom cover 12 is arranged at the bottom of the housing 10. A top cover 14 is connected to the top of the housing 10 through bolts 26. A closed space is formed among the housing 10, the top cover 14 and the bottom cover 12. The inner peripheral wall of the housing 10 is recessed outward to form a concave groove 18. The concave groove 18 increases the internal space. When the battery fails and a large amount of gas is generated by combustion, the existence of the concave groove 18 reduces the internal pressure and makes the battery not prone to explosion. The height of the concave groove 18 is less than the height of the lithium battery 16, so that the top of the lithium battery 16 and the housing 10 are in a clamping form to fix the lithium battery 16 and make the lithium battery 16 not prone to shaking. A gland 28 for guiding the wire is threadedly connected to the center of the top cover 14;

[0017] The height of the housing 10 is greater than the height of the lithium battery 16, and a groove 20 is formed above the lithium battery 16. The presence of the groove 20 further increases the internal space and enhances the overall compressive effect. A pressing member is arranged in the groove 20. The pressing member is used to press the battery to fix the battery so that it is not easy to shake. The pressing member includes a pressing plate 22 in contact with the top surface of the battery and a clamping plate 24 integrally formed with the pressing plate 22. A clamping groove adapted to the clamping plate 24 is formed on the bottom surface of the top cover 14. The clamping groove and the clamping plate 24 cooperate to fix the pressing member. A through groove is formed at the center of the pressing plate 22. The through groove is used to connect the wire and the battery. A thin sheet in contact with the end of the battery can be arranged at the end of the wire. The pressing plate 22 is used to press the thin sheet so that it is not easy to have poor contact between the battery and the wire.

[0018] To implement the above pressing method, the accuracy of the height of the lithium battery 16 and the height of the clamping plate 24 is relatively high. The clamping plate 24 is closely attached to the inner peripheral wall of the housing 10. A strip-shaped groove penetrating in its thickness direction is formed on the clamping plate 24. The length direction of the strip-shaped groove is the same as the height direction of the battery. A threaded groove corresponding to the strip-shaped groove is formed on the inner peripheral wall of the housing 10. During use, press the pressing plate 22 tightly, and then pass a bolt 26 through the strip-shaped groove and thread it into the threaded groove to fix the battery.

[0019] A convex ring corresponding to the concave groove 18 is formed by the upward protrusion of the top surface of the bottom cover 12. The convex ring limits the bottom surface of the lithium battery 16 so that it is not easy to shake.

[0020] The outer peripheral wall of the bottom cover 12 is connected to the bottom surface of the housing 10 by an adhesive method. The adhesive method can strengthen the connection between the bottom cover 12 and the housing 10 and also increase the sealing performance.

[0021] The volume of the battery is greater than 20% of the sum of the accommodation groove and the concave groove.

[0022] Embodiment 2: The difference from Embodiment 1 is that a thread is provided on the outer peripheral wall of the convex ring, and a threaded groove corresponding to the convex ring is formed on the inner peripheral wall of the housing 10. The housing 10 and the bottom cover 12 are connected by a threaded connection method, which is easier to disassemble during later maintenance or battery replacement.

Claims

1. An explosion-proof lithium battery, characterized in that: It includes a housing. An accommodation groove for accommodating a lithium battery is provided inside the housing. A bottom cover is provided at the bottom of the housing. A top cover is connected to the top of the housing by bolts. The inner peripheral wall of the housing is recessed outward to form a recessed groove, and the height of the recessed groove is less than the height of the lithium battery. A gland is threadedly connected to the center of the top cover; The height of the housing is greater than the height of the lithium battery and a groove is formed above the lithium battery. A pressing member is provided in the groove. The pressing member includes a pressing plate that contacts the top surface of the battery and a clamping plate that is integrally formed with the pressing plate. A clamping groove adapted to the clamping plate is provided on the bottom surface of the top cover; The clamping plate is closely attached to the inner peripheral wall of the housing. A strip-shaped groove penetrating in the thickness direction thereof is provided on the clamping plate, and the length direction of the strip-shaped groove is the same as the height direction of the battery. A threaded groove corresponding to the strip-shaped groove is provided on the inner peripheral wall of the housing; A convex ring corresponding to the recessed groove is formed by the top surface of the bottom cover protruding upward. The outer peripheral wall of the bottom cover is connected to the bottom surface of the housing by an adhesive method; A convex ring corresponding to the recessed groove is formed by the top surface of the bottom cover protruding upward. Thread lines are provided on the outer peripheral wall of the convex ring. A threaded groove corresponding to the convex ring is provided on the inner peripheral wall of the housing.

2. The explosion-proof lithium battery according to claim 1, wherein: The volume of the battery is greater than 20% of the sum of the accommodation groove and the recessed groove.

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