Protection device of lithium battery

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a protection device of a lithium battery, which solves the problems in the background technology, and comprises a shell and an upper cover, the upper cover is arranged at the top of the shell, a core body is arranged in the shell, a cavity is arranged in the core body, and the upper cover is arranged in the cavity. Buffer plates are slidably connected to the two opposite side walls and the bottom wall in the cavity correspondingly, a lithium battery pack can be placed between the buffer plates, sliding rods are arranged between the buffer plates and the cavity, inserting grooves are formed in the side walls of the core body, one ends of the sliding rods are fixedly connected with the buffer plates, and the other ends of the sliding rods are fixedly connected with the inserting grooves. One end of the sliding rod is provided with a slot, the other end of the sliding rod is provided with a limiting ring and is inserted into the slot in a sliding manner, a compression spring is arranged between the buffer plate and the inner wall of the cavity, and the outer side of the sliding rod is sleeved with the compression spring.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, in particular to a protection device for lithium batteries. Background Art

[0002] When lithium batteries are hit or physically damaged, they may cause safety problems, including leakage, short circuit, overheating, etc. In order to prevent these risks, corresponding measures are generally taken to protect lithium batteries from collisions, such as using a sturdy mechanical casing or external packaging, or using shockproof materials around the battery, such as rubber pads or buffer materials, to absorb the impact of the collision and reduce the degree of damage to the battery.

[0003] However, since lithium battery installation generally involves uniformly loading multiple lithium battery cells into a bracket to form a lithium battery pack, and then placing the entire pack into a protective shell, current protective devices generally involve filling with shockproof materials. When the number of lithium battery cells in a lithium battery pack changes, which in turn causes a change in the volume of the lithium battery pack, it is difficult to adapt to lithium battery packs of different volumes and provide effective buffering and protection. Adjusting the filling amount of shockproof materials is rather troublesome. Therefore, we propose a lithium battery protection device. Utility Model Content

[0004] In order to solve the problem that current protection devices are generally filled with shockproof materials, when the number of lithium battery cells in a lithium battery pack changes and thus causes the volume of the lithium battery pack to change, it is difficult to adapt to lithium battery packs of different volumes and provide effective buffering and protection, and adjusting the filling amount of shockproof materials is relatively troublesome, the utility model provides the following technical solutions: a lithium battery protection device, comprising a shell and an upper cover, the upper cover is installed on the top of the shell, a core body is arranged in the shell, a cavity is opened in the core body, two opposite side walls and a bottom wall in the cavity are respectively slidably connected with buffer plates, a lithium battery pack can be placed between the buffer plates, a sliding rod is arranged between the buffer plates and the cavity, a slot is opened in the side wall of the core body, one end of the sliding rod is fixedly connected to the buffer plate, a limiting ring is arranged on the other end of the sliding rod and is slidably inserted in the slot, a compression spring is arranged between the buffer plate and the inner wall of the cavity, and the compression spring is sleeved on the outside of the sliding rod.

[0005] Preferably, the opposite surfaces of the two buffer plates connected to the side walls are respectively provided with sliding grooves, the sliding grooves are horizontally arranged, a fixed clip is provided at one end of the sliding groove, a sliding clip is slidably connected in the sliding groove, and the fixed clip and the sliding clip cooperate with each other to stably clamp the lithium battery pack.

[0006] Preferably, the sliding clamp includes a clamping plate and a sliding seat, the sliding seat is slidably connected in the sliding groove, a tension spring is connected between the sliding seat and the fixed clamp, the tension spring is arranged in the sliding groove, and the outer side wall of the sliding seat is fixedly connected to the clamping plate.

[0007] Preferably, the clamping plate and the fixing clamp are arranged opposite to each other, and anti-slip pads are provided on the opposite surfaces.

[0008] Preferably, the buffer plate connected to the bottom wall is lower than the two buffer plates connected to the side walls, the lithium battery pack is placed between the buffer plates, and the top of the lithium battery pack can exceed the shell.

[0009] Preferably, a buffer pad is installed on the lower wall of the upper cover, and the buffer pad is made of silicone material.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] By placing the lithium battery pack between multiple buffer plates, the clamping plate of the battery clamp is moved away from the fixing clamp, thereby stretching the tension spring. The stretched tension spring applies a force to the clamping plate close to the fixing clamp through the slide seat, which can stably fix the lithium battery pack. The lithium battery pack fills the space between the buffer plates and pushes two buffer plates connected to the side walls of the cavity, thereby compressing the compression spring. The upper cover is then buckled onto the shell, and the top of the lithium battery pack is pressed down into the cavity, which can compress the compression spring at the bottom. The compression spring applies an opposite force to the lithium battery pack through the buffer plate at the bottom, which can prevent the lithium battery pack from generating large vibrations in the vertical direction, thereby achieving the effect of effectively protecting lithium battery packs of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the housing portion of the utility model when viewed from the front;

[0015] Figure 3 This is a schematic diagram of the structure of the buffer plate part of the utility model;

[0016] In the figure: 1. shell; 2. upper cover; 3. core; 4. cavity; 5. buffer plate; 6. slide rod; 7. slot; 8. limit ring; 9. compression spring; 10. slide groove; 11. clamping plate; 12. slide seat; 13. tension spring; 14. buffer pad; 15. fixing clamp. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] Depend on Figure 1-3 It is given that the utility model includes a shell 1 and an upper cover 2, the upper cover 2 is installed on the top of the shell 1, a core body 3 is arranged in the shell 1, a cavity 4 is opened in the core body 3, two opposite side walls and the bottom wall in the cavity 4 are slidably connected with buffer plates 5, a lithium battery pack can be placed between the buffer plates 5, a slide rod 6 is arranged between the buffer plates 5 and the cavity 4, a slot 7 is opened on the side wall of the core body 3, one end of the slide rod 6 is fixedly connected to the buffer plate 5, a limiting ring 8 is arranged on the other end of the slide rod 6 and is slidably inserted in the slot 7, a compression spring 9 is arranged between the buffer plate 5 and the inner wall of the cavity 4, and the compression spring 9 is sleeved on the outside of the slide rod 6.

[0019] The opposite surfaces of the two buffer plates 5 connected to the side walls are respectively provided with a slide groove 10, the slide groove 10 is horizontally arranged, a fixed clamp 15 is provided at one end of the slide groove 10, a sliding clamp is slidably connected in the slide groove 10, and the fixed clamp 15 and the sliding clamp cooperate with each other to stably clamp the lithium battery pack.

[0020] The sliding clamp includes a clamping plate 11 and a sliding seat 12. The sliding seat 12 is slidably connected in the sliding groove 10. A tension spring 13 is connected between the sliding seat 12 and the fixed clamp 15. The tension spring 13 is arranged in the sliding groove 10. The outer wall of the sliding seat 12 is fixedly connected to the clamping plate 11.

[0021] The clamping plate 11 and the fixing clamp 15 are arranged opposite to each other, and anti-slip pads are arranged on the opposite surfaces.

[0022] The buffer plate 5 connected to the bottom wall is lower than the two buffer plates 5 connected to the side walls. The lithium battery pack is placed between the buffer plates 5 , and the top of the lithium battery pack can exceed the housing 1 .

[0023] A buffer pad 14 is installed on the lower wall of the upper cover 2. The buffer pad 14 is made of silicone material. The buffer pad 14 can protect the top of the lithium battery pack. The upper cover 2 is buckled on the shell 1 to press the lithium battery pack down and compress the compression spring 9 at the bottom to prevent the lithium battery pack from generating large vibrations in the vertical direction.

[0024] Working principle: During installation, the lithium battery pack is placed between multiple buffer plates 5, and the clamping plate 11 of the battery clamp is moved away from the fixing clamp 15, thereby stretching the tension spring 13. The stretched tension spring 13 applies a force to the clamping plate 11 close to the fixing clamp 15 through the slide 12, which can stably fix the lithium battery pack. The lithium battery pack fills the space between the buffer plates 5 and pushes the two buffer plates 5 connected to the side walls of the cavity 4, thereby compressing the compression spring 9, and then buckling the upper cover 2 onto the shell 1, pressing the top of the lithium battery pack down into the cavity 4, which can compress the compression spring 9 at the bottom. The compression spring 9 applies an opposite force to the lithium battery pack through the buffer plate 5 at the bottom, which can prevent the lithium battery pack from generating large vibrations in the vertical direction.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery protection device, comprising a housing (1) and an upper cover (2), wherein the upper cover (2) is mounted on the top of the housing (1). Features: A core body (3) is arranged in the shell (1), a cavity (4) is provided in the core body (3), two opposite side walls and a bottom wall in the cavity (4) are slidably connected with buffer plates (5), a lithium battery pack can be placed between the buffer plates (5), a slide bar (6) is arranged between the buffer plates (5) and the cavity (4), a slot (7) is arranged on the side wall of the core body (3), one end of the slide bar (6) is fixedly connected to the buffer plate (5), a limit ring (8) is arranged at the other end of the slide bar (6) and is slidably inserted in the slot (7), a compression spring (9) is arranged between the buffer plate (5) and the inner wall of the cavity (4), and the compression spring (9) is sleeved on the outside of the slide bar (6).

2. A lithium battery protection device according to claim 1, Features: The opposing surfaces of the two buffer plates (5) connected to the side walls are respectively provided with slide grooves (10), the slide grooves (10) are arranged horizontally, one end of the slide grooves (10) is provided with a fixing clamp (15), a sliding clamp is slidably connected in the slide grooves (10), and the fixing clamp (15) and the sliding clamp cooperate with each other to stably clamp the lithium battery pack.

3. A lithium battery protection device according to claim 2, Features: The sliding clamp comprises a clamping plate (11) and a sliding seat (12), wherein the sliding seat (12) is slidably connected in the sliding groove (10), a tension spring (13) is connected between the sliding seat (12) and the fixed clamp (15), and the tension spring (13) is arranged in the sliding groove (10), and the outer side wall of the sliding seat (12) is fixedly connected to the clamping plate (11).

4. A lithium battery protection device according to claim 3, Features: The clamping plate (11) and the fixing clamp (15) are arranged opposite to each other, and anti-slip pads are arranged on the opposite surfaces.

5. A lithium battery protection device according to claim 1, Features: The buffer plate (5) connected to the bottom wall is lower than the two buffer plates (5) connected to the side walls, the lithium battery pack is placed between the buffer plates (5), and the top of the lithium battery pack can exceed the shell (1).

6. A lithium battery protection device according to claim 1, Features: A buffer pad (14) is installed on the lower wall of the upper cover (2), and the buffer pad (14) is made of silicone material.

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