Lithium battery with explosion-proof mechanism

Abstract

A lithium battery with an anti-explosion mechanism comprises an anti-explosion shell, a battery pack is arranged in the anti-explosion shell, movable plates are arranged on the periphery of the battery pack, telescopic rods are fixedly connected to the four corners of the four inner walls of the anti-explosion shell, the telescopic ends of the telescopic rods are fixedly connected with the movable plates, and the outer sides of the telescopic rods are sleeved with first buffer springs; and one end of the first buffer spring is fixedly connected with the explosion-proof shell, and the other end is fixedly connected with the movable plate. Compared with the prior art, the explosion-proof battery pack has the advantages that when the battery pack explodes, the explosion-proof shell can provide enough strength to bear internal explosion impact and prevent explosion flames from spreading to the surrounding environment, and meanwhile, the buffering structure can internally buffer impact force generated during explosion, so that the explosion-proof battery pack is prevented from being damaged by explosion, and the service life of the explosion-proof battery pack is prolonged. And impact force can be evenly dispersed, the explosion-proof effect is improved, and pressure relief can be conducted in time when explosion occurs through a pressure relief opening and a sealing piston.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery with an explosion-proof mechanism. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. Lithium batteries are widely used and are often used in energy storage, power, etc.

[0003] In daily use, lithium batteries are prone to explosion due to long-term overcharging of the battery cells or internal short circuits, causing great damage to people's lives and property. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a lithium battery with an explosion-proof mechanism to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is a lithium battery containing an explosion-proof mechanism, including an explosion-proof shell, a battery pack is arranged inside the explosion-proof shell, and movable plates are arranged around the battery pack, and telescopic rods are fixedly connected at the four corners of the four inner walls of the explosion-proof shell, and the telescopic end of the telescopic rod is fixedly connected to the movable plate, and a first buffer spring is sleeved on the outer side of the telescopic rod, one end of the first buffer spring is fixedly connected to the explosion-proof shell and the other end is fixedly connected to the movable plate, and a buffer structure is provided between the movable plate and the explosion-proof shell.

[0006] As an improvement: the buffer structure includes a groove, an extrusion block, a second buffer spring and a connecting rod. Four grooves distributed in a circular array are opened on the four inner walls of the explosion-proof shell. The inside of the groove is slidably connected with an extrusion block. A second buffer spring is provided between the extrusion block and a side wall of the groove away from the middle of the inner wall of the explosion-proof shell. A connecting rod is hinged on the side wall of the extrusion block close to the movable plate, and the other end of the connecting rod is hinged to the movable plate.

[0007] As an improvement: pressure relief ports are respectively provided at the four corners of the upper outer wall of the explosion-proof housing.

[0008] As an improvement: a sealing piston is provided in the pressure relief port.

[0009] As an improvement: the movable plate is slidably matched with the lower inner wall of the explosion-proof housing.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The explosion-proof shell can provide sufficient strength to withstand the internal explosion impact and prevent the explosion flame from spreading to the surrounding environment when the battery pack explodes. At the same time, the buffer structure can internally buffer the impact force generated by the explosion, and can evenly disperse the impact force to improve the explosion-proof effect. The pressure relief port and sealing piston can be used to relieve pressure in time when an explosion occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a lithium battery with an explosion-proof mechanism according to the utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of an explosion-proof housing of a lithium battery containing an explosion-proof mechanism according to the utility model;

[0014] Figure 3 This is a schematic diagram of a buffer structure of a lithium battery with an explosion-proof mechanism according to the utility model;

[0015] As shown in the figure:

[0016] 1. Explosion-proof shell; 2. Battery pack; 1.1. Movable plate; 1.2. Telescopic rod; 1.3. First buffer spring; 3. Buffer structure; 3.1. Groove; 3.2. Extrusion block; 3.3. Second buffer spring; 3.4. Connecting rod; 1.4. Pressure relief port; 1.5. Sealing piston. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features and purpose effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both sides", "one side", "the other side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1 and Figure 2 As shown, a lithium battery with an explosion-proof mechanism includes an explosion-proof shell 1, which can provide sufficient strength to withstand the internal explosion impact and prevent the explosion flame from spreading to the surrounding environment. A battery pack 2 is arranged inside the explosion-proof shell 1, and a movable plate 1.1 is arranged around the battery pack 2. Telescopic rods 1.2 are fixedly connected at four corners on the four inner walls of the explosion-proof shell 1, and the telescopic end of the telescopic rod 1.2 is fixedly connected to the movable plate 1.1. A first buffer spring 1.3 is sleeved on the outer side of the telescopic rod 1.2, one end of the first buffer spring 1.3 is fixedly connected to the explosion-proof shell 1 and the other end is fixedly connected to the movable plate 1.1. When an explosion occurs, the movable plate 1.1 moves to cause the telescopic end of the telescopic rod 1.2 to shrink, and the first buffer spring 1.3 buffers the impact force to further improve the explosion-proof effect. A buffer structure 3 is provided between the movable plate 1.1 and the explosion-proof shell 1.

[0021] Specifically, Figure 3 As shown, a lithium battery with an explosion-proof mechanism, the buffer structure 3 includes a groove 3.1, an extrusion block 3.2, a second buffer spring 3.3 and a connecting rod 3.4, four inner walls of the explosion-proof shell 1 are provided with four grooves 3.1 distributed in a ring array, the inner part of the groove 3.1 is slidably connected with the extrusion block 3.2, a second buffer spring 3.3 is provided between the extrusion block 3.2 and a side wall of the groove 3.1 away from the middle of the inner wall of the explosion-proof shell 1, a connecting rod 3.4 is hinged on a side wall of the extrusion block 3.2 close to the movable plate 1.1, and the other end of the connecting rod 3.4 is hinged to the movable plate 1.1. When an explosion occurs, the impact force will force the movable plate 1.1 to move away from the battery pack 2. When the movable plate 1.1 moves, the connecting rod 3.4 will push the extrusion block 3.2 to squeeze the second buffer spring 3.3. The second buffer spring 3.3 buffers and consumes the impact force, and the four second buffer springs 3.3 arranged on the four inner walls of the explosion-proof shell 1 can disperse and buffer the impact force to improve the explosion-proof effect.

[0022] Specifically, Figure 3As shown, a lithium battery with an explosion-proof mechanism has pressure relief ports 1.4 at the four corners of the upper outer wall of the explosion-proof housing 1. When an explosion occurs, the pressure in the explosion-proof housing 1 will lift the sealing piston 1.5, so that the pressure is discharged from the pressure relief ports 1.4 in time.

[0023] Specifically, Figure 3 As shown, a lithium battery with an explosion-proof mechanism, a sealing piston 1.5 is provided in a pressure relief port 1.4, and the sealing piston 1.5 can make the explosion-proof housing 1 sealed.

[0024] Specifically, Figure 3 As shown, a lithium battery with an explosion-proof mechanism, the movable plate 1.1 is slidably matched with the lower inner wall of the explosion-proof shell 1. When an explosion occurs, the movable plate 1.1 will slide away from the battery pack 2.

[0025] During the specific implementation of the utility model, when the battery pack 2 explodes, the impact force will force the movable plate 1.1 to move away from the battery pack 2. When the movable plate 1.1 moves, the connecting rod 3.4 will push the extrusion block 3.2 to squeeze the second buffer spring 3.3. The second buffer spring 3.3 buffers and consumes the impact force, and the four second buffer springs 3.3 arranged on the four inner walls of the explosion-proof shell 1 can disperse and buffer the impact force to improve the explosion-proof effect. When the movable plate 1.1 moves, the telescopic end of the telescopic rod 1.2 will shrink. The first buffer spring 1.3 can also buffer and consume the impact force to further improve the explosion-proof effect. The pressure in the explosion-proof shell 1 will lift the sealing piston 1.5, so that the internal pressure can be discharged from the pressure relief port 1.4 in time.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A lithium battery with an explosion-proof mechanism, comprising an explosion-proof housing (1), characterized in that: A battery pack (2) is provided inside the explosion-proof housing (1), and movable plates (1.1) are provided around the battery pack (2). Telescopic rods (1.2) are fixedly connected at four corners on four inner walls of the explosion-proof housing (1), and the telescopic end of the telescopic rod (1.2) is fixedly connected to the movable plate (1.1). A first buffer spring (1.3) is sleeved on the outer side of the telescopic rod (1.2), and one end of the first buffer spring (1.3) is fixedly connected to the explosion-proof housing (1) and the other end is fixedly connected to the movable plate (1.1), and a buffer structure (3) is provided between the movable plate (1.1) and the explosion-proof housing (1).

2. A lithium battery with an explosion-proof mechanism according to claim 1, characterized in that: The buffer structure (3) comprises a groove (3.1), an extrusion block (3.2), a second buffer spring (3.3) and a connecting rod (3.4); four grooves (3.1) distributed in a ring array are provided on the four inner walls of the explosion-proof shell (1); an extrusion block (3.2) is slidably connected inside the groove (3.1); a second buffer spring (3.3) is provided between the extrusion block (3.2) and a side wall of the groove (3.1) away from the middle of the inner wall of the explosion-proof shell (1); a connecting rod (3.4) is hingedly connected to a side wall of the extrusion block (3.2) close to the movable plate (1.1); the other end of the connecting rod (3.4) is hingedly connected to the movable plate (1.1).

3. A lithium battery with an explosion-proof mechanism according to claim 1, characterized in that: Pressure relief ports (1.4) are respectively provided at the four corners of the upper outer wall of the explosion-proof housing (1).

4. A lithium battery with an explosion-proof mechanism according to claim 3, characterized in that: A sealing piston (1.5) is arranged in the pressure relief port (1.4).

5. A lithium battery with an explosion-proof mechanism according to claim 1, characterized in that: The movable plate (1.1) is in sliding engagement with the lower inner wall of the explosion-proof housing (1).

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