Heat spreading prevention and explosion prevention type cylindrical battery pack device

Abstract

The utility model discloses a heat-spreading-preventing and explosion-proof cylindrical battery pack device which comprises a shell, an explosion-proof box and batteries, the explosion-proof box is arranged in the shell; a plurality of battery mounting cavities are formed in the explosion-proof box, and a heat insulation layer is arranged between every two adjacent battery mounting cavities; and the plurality of batteries are correspondingly arranged in the plurality of battery mounting cavities. According to the utility model, smoke, fire and explosion caused by high temperature of adjacent battery cells due to thermal runaway of the battery monomers can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and in particular relates to a heat-spreading-proof and explosion-proof cylindrical battery pack device. Background Art

[0002] A battery pack is a power component that connects multiple batteries in parallel or series. In order to keep the multiple batteries stable and form a whole, the batteries usually need to be arranged side by side and then packaged. The intervals between the batteries are small, so if thermal runaway occurs in individual batteries, it is easy to affect adjacent batteries, which can easily cause the battery pack to smoke, catch fire, or explode. Utility Model Content

[0003] The utility model provides a heat-spreading and explosion-proof cylindrical battery pack device to solve the above-mentioned technical problems.

[0004] The solution adopted by the utility model to achieve its technical effect is:

[0005] A heat-spreading and explosion-proof cylindrical battery pack device comprises a shell, an explosion-proof box and batteries; the explosion-proof box is arranged in the shell; a plurality of battery installation cavities are arranged in the explosion-proof box, and a heat insulation layer is arranged between two adjacent battery installation cavities; the plurality of batteries are correspondingly arranged in the plurality of battery installation cavities.

[0006] Preferably, the plurality of batteries are connected in parallel with each other via a PC board; a PTC thermistor is provided on the PC board.

[0007] Preferably, a heat insulation cavity is provided in the heat insulation layer.

[0008] Preferably, a thermal insulation pad is provided in the thermal insulation cavity.

[0009] Preferably, the thermal insulation pad is a mica thermal insulation pad.

[0010] Preferably, protective cushion blocks are provided between the two sides of the explosion-proof box and the outer shell.

[0011] Preferably, the top and bottom of the explosion-proof box are arranged to avoid air around the position corresponding to the battery installation cavity; and reinforcing rib plates are arranged at the top and bottom of the explosion-proof box corresponding to the position of the battery installation cavity.

[0012] Preferably, the explosion-proof box consists of an upper shell and a lower shell; a positioning groove is provided on one side of the upper shell; an embedding opening is opened in the positioning groove; a positioning plate is provided on the top of one side of the lower shell, and the positioning plate is slidably inserted in the positioning groove; an embedding block is provided on the top of the positioning plate; and the embedding block is embedded in the embedding opening.

[0013] The beneficial effects of the utility model are as follows: a heat insulation structure is added between batteries, the influence of high temperature of a single battery on adjacent batteries is reduced, and smoke, fire and explosion caused by high temperature of adjacent cells due to thermal runaway of the battery monomer are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a housing disclosed in an embodiment of the utility model;

[0015] Figure 2 A schematic diagram of a PC board and a PTC thermistor disclosed in an embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of an explosion-proof box disclosed in an embodiment of the utility model;

[0017] Figure 4 A schematic diagram of a lower shell disclosed in an embodiment of the utility model;

[0018] Figure 5 This is a schematic diagram of the upper shell disclosed in the embodiment of the utility model.

[0019] Label description: 1-housing, 2-explosion-proof box, 21-upper shell, 22-lower shell, 23-positioning groove, 24-embedding port, 25-positioning plate, 26-embedding block, 3-battery, 4-thermal insulation layer, 5-PC board, 6-PTC thermistor, 7-thermal insulation cavity, 8-thermal insulation pad, 9-battery installation cavity, 10-protective pad, 11-reinforcement rib plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that when an element is referred to as "fixed on" or "set on" another element, it can be directly on the other element or there may be a centering element at the same time. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be a centering element at the same time. When an element is referred to as being "fixedly connected to" another element, it can be a common fixed connection method such as welding, bolting or gluing.

[0021] Please refer to Figure 1-5 In a preferred embodiment of the utility model, a heat-spreading-proof and explosion-proof cylindrical battery pack device is disclosed, comprising a shell 1, an explosion-proof box 2 and a battery 3; the explosion-proof box 2 is arranged in the shell 1; a plurality of battery installation cavities 9 are arranged in the explosion-proof box 2, and a heat insulation layer 4 is arranged between two adjacent battery installation cavities 9; the plurality of batteries 3 are correspondingly arranged in the plurality of battery installation cavities.

[0022] Specifically, the plurality of batteries 3 are connected in parallel via a PC board 5 , and a PTC thermistor 6 is provided on the PC board 5 , which can control a single battery 3 to form a short circuit when thermal runaway occurs, thereby causing short circuits in other batteries 3 connected in parallel to cause collective thermal runaway.

[0023] Specifically, a heat-insulating cavity 7 is provided in the heat-insulating layer 4 , and a heat-insulating pad 8 is provided in the heat-insulating cavity 7 . The heat-insulating pad 8 is a mica heat-insulating pad, which greatly improves the heat-insulating effect of the heat-insulating layer 4 .

[0024] Specifically, protective pads 10 are arranged between the two sides of the explosion-proof box 2 and the housing 1; the top and bottom of the explosion-proof box 2 are arranged to avoid air around the position of the battery installation cavity 9; and reinforcing ribs 11 are arranged at the top and bottom of the explosion-proof box 2 corresponding to the position of the battery installation cavity 9. The explosion-proof box 2 has high structural strength and good protective measures to prevent external collisions from affecting the working performance of the internal battery pack.

[0025] Specifically, the explosion-proof box 2 is composed of an upper shell 21 and a lower shell 22; a positioning groove 23 is provided on one side of the upper shell 21; an embedding opening 24 is opened in the positioning groove 23; a positioning plate 25 is provided on the top of one side of the lower shell 22, and the positioning plate 25 is slidably inserted in the positioning groove 23; an embedding block 26 is provided on the top of the positioning plate 25; the embedding block 26 is embedded in the embedding opening 24.

[0026] It can be seen from the above description that the utility model can effectively prevent the battery monomer from being thermally runaway, causing the adjacent battery cells to smoke, catch fire, and explode due to high temperature.

[0027] The preferred embodiments of the present invention are described in detail above in conjunction with the drawings in the specification. It should be noted that the protection scope of the present invention includes but is not limited to the above embodiments. The specific structures disclosed in the drawings in the specification are only preferred embodiments of the present invention. Technical personnel in the field can also develop other embodiments on this basis. Any simple deformation or equivalent substitution that does not deviate from the innovative concept of the present invention is covered by the present invention and belongs to the protection scope of the present invention.

Claims

1. A heat spread proof and explosion proof cylindrical battery pack device, characterized in that: include: shell; An explosion-proof box; the explosion-proof box is arranged in the shell; a plurality of battery installation cavities are arranged in the explosion-proof box, and a heat insulation layer is arranged between two adjacent battery installation cavities; the explosion-proof box is composed of an upper shell and a lower shell; a positioning groove is arranged on one side of the upper shell; an embedding opening is opened in the positioning groove; a positioning plate is arranged on the top of one side of the lower shell, and the positioning plate is slidably inserted in the positioning groove; an embedding block is arranged on the top of the positioning plate; the embedding block is embedded in the embedding opening; Battery; the plurality of batteries are correspondingly arranged in the plurality of battery installation cavities.

2. The heat-spread-proof and explosion-proof cylindrical battery pack device according to claim 1, characterized in that: The batteries are connected in parallel via a PC board; a PTC thermistor is arranged on the PC board.

3. The heat-spread-proof and explosion-proof cylindrical battery pack device according to claim 1, characterized in that: A heat insulation cavity is arranged in the heat insulation layer.

4. The heat-spread-proof and explosion-proof cylindrical battery pack device according to claim 3, characterized in that: A heat insulation pad is arranged in the heat insulation cavity.

5. The heat-spread-proof and explosion-proof cylindrical battery pack device according to claim 4, characterized in that: The thermal insulation pad is a mica thermal insulation pad.

6. The heat-spread-proof and explosion-proof cylindrical battery pack device according to claim 1, characterized in that: Protective cushion blocks are arranged between the two sides of the explosion-proof box and the outer shell.

7. The heat-spread-proof and explosion-proof cylindrical battery pack device according to claim 1, characterized in that: The top and bottom of the explosion-proof box are arranged to avoid air around the position of the battery installation cavity; the top and bottom of the explosion-proof box are arranged with reinforcing rib plates at the positions of the battery installation cavity.

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