CN-116315417-B - Battery explosion-proof valve air guide device and power battery pack

Abstract

The invention provides a battery explosion-proof valve air guide device and a power battery pack, wherein the power battery pack is provided with a plurality of single batteries, each single battery is provided with an explosion-proof valve, the battery explosion-proof valve air guide device comprises a main board, an air guide channel and a plurality of guide parts, the main board is used for being connected with the single batteries, the air guide channel is arranged on the main board and is communicated with a drain opening of the explosion-proof valve, the air guide channel comprises an exhaust outlet, and the guide parts are communicated with the air guide channel and are used for guiding combustible substances drained by the explosion-proof valve to the exhaust outlet. The invention can guide the combustible substances to be smoothly discharged outside the battery box, and improves the exhaust efficiency.

Inventors

• XU LEI
• HONG XIN

Assignees

• 杭州安影科技有限公司

Dates

Publication Date

20260508

Application Date

20230310

Claims (6)

1. 1. The utility model provides a battery explosion-proof valve air guide device, is applied to power battery package, power battery package has a plurality of battery cells (3), every battery cell (3) are equipped with explosion-proof valve (31), its characterized in that, battery explosion-proof valve air guide device includes: the main board (11) is used for being connected with the single battery (3); The air guide channel (12) is arranged on the main board (11), the air guide channel (12) is communicated with the drain port of the explosion-proof valve (31), the air guide channel (12) comprises an exhaust outlet (121), one end of the air guide channel (12) is provided with the exhaust outlet (121), the other end of the air guide channel is a closed end (122), and the air guide channel (12) is a one-way channel; A plurality of flow guiding parts (13) communicated with the air guiding channel (12) for guiding the combustible substances discharged by the explosion-proof valve (31) to the exhaust outlet (121); The flow guiding part (13) comprises a non-return region and a guiding region, the non-return region is used for preventing the combustible substance from flowing in the opposite direction of the exhaust outlet (121) and returning the combustible substance to the guiding region, and the guiding region is used for guiding the combustible substance to flow in the direction of the exhaust outlet (121); The main board (11) comprises a first end part (111), a second end part (112), a first surface part (115) and a first side (113), wherein a long-strip-shaped groove is formed in the first surface part (115), the length direction of the long-strip-shaped groove is consistent with that of the main board (11), the long-strip-shaped groove forms an air guide channel (12), the air guide channel (12) extends from the first end part (111) towards the second end part (112), an exhaust outlet (121) penetrates through the first end part (111), the main board (11) is pressed on the surface of the single battery through the first surface part (115), and the air guide channel (12) covers the explosion-proof valve (31); The guide area comprises a first arc-shaped section (133), the non-return area comprises a second arc-shaped section (134), one end of the first arc-shaped section (133) is connected with the air guide channel (12), the other end of the first arc-shaped section is connected with the second arc-shaped section (134), the first arc-shaped section (133) is bent towards the direction of the first side edge (113), one end of the second arc-shaped section (134) is connected with the first arc-shaped section (133), the other end of the second arc-shaped section (134) is connected with the air guide channel (12), the second arc-shaped section (134) is bent towards the direction of the second end (112), and the bending curvature of the second arc-shaped section (134) is larger than that of the first arc-shaped section (133); The guide area further comprises a third arc-shaped section (135), the third arc-shaped section (135) is symmetrically arranged with the first arc-shaped section (133), the non-return area further comprises a fourth arc-shaped section (136), the fourth arc-shaped section (136) is symmetrically arranged with the second arc-shaped section (134), the guide part (13) is provided with a heart-shaped groove, and the heart-shaped groove is communicated with the air guide channel (12).
2. 2. The battery explosion-proof valve air guide device according to claim 1, wherein a flow dividing piece (14) is arranged between two adjacent flow guiding parts (13), and the flow dividing piece (14) is positioned in the air guide channel (12) and used for dividing the combustible substances to two sides of the heart-shaped groove.
3. 3. The battery explosion-proof valve air guide apparatus according to claim 2, wherein the flow divider (14) has a triangular shape, an apex (141) of the flow divider (14) faces the second end (112), and an opposite side (142) of the flow divider (14) faces the first end (111).
4. 4. A battery explosion-proof valve air guide according to claim 2 or 3, wherein the main plate (11) is made of a thermosetting material, and the main plate (11), the air guide passage (12), the air guide portion (13) and the shunt member (14) are integrally formed.
5. 5. The battery explosion-proof valve air guide device according to claim 1, wherein the main board (11) comprises an insulating sealing gasket, the insulating sealing gasket is connected with the first face (115), and the insulating sealing gasket is provided with a notch corresponding to the air guide channel (12).
6. 6. The utility model provides a power battery package, includes battery box (2) and a plurality of battery cell (3), every battery cell (3) are equipped with explosion-proof valve (31), its characterized in that: the battery explosion-proof valve air guide device (1) according to any one of claims 1-5, wherein the explosion-proof valve air guide device (1) covers the explosion-proof valve (31), the battery box (2) is provided with an air dispersing hole (21), an air exhaust outlet (121) of the battery explosion-proof valve air guide device (1) is communicated with the air dispersing hole (21), and combustible substances are discharged to the outside of the battery box (2) through the air dispersing hole (21).

Description

Battery explosion-proof valve air guide device and power battery pack Technical Field The invention relates to the technical field of batteries, in particular to a battery explosion-proof valve air guide device and a power battery pack. Background The utility model provides a power battery package that electric automobile and energy storage system used, includes battery box and a plurality of battery cell, and battery cell can thermal reaction between electrolyte and the electrode material produce gas at the operation in-process, in order to prevent that gas from gathering in the inside of battery and leading to the battery explosion, battery cell is provided with explosion-proof valve generally, and when inside atmospheric pressure increased to a certain extent, explosion-proof valve opened, and the combustible material such as flame, smog or gas of battery cell inside discharges through explosion-proof valve. However, the combustible materials are directly discharged inside the battery box, no special exhaust channel exists, and the discharged high-temperature combustible materials can be directly sprayed onto other single batteries to influence the other single batteries, so that the short circuit of the wire harness inside the battery box and the thermal runaway of the adjacent batteries are easily caused. In order to solve the problem, in the prior art, a metal sheet metal part is bent to form an exhaust channel, so that combustible substances are discharged out of the battery box, but the combustible substances are easily accumulated in the exhaust channel, so that blockage and unsmooth discharge are caused, and the risk of leakage in the battery box still exists for a long time. Disclosure of Invention In view of the above, the present invention aims to provide a battery explosion-proof valve air guide device and a power battery pack, so as to solve the problems of poor discharge of combustible materials and leakage in a battery box in the prior art. The invention provides a battery explosion-proof valve air guide device which is applied to a power battery pack, wherein the power battery pack is provided with a plurality of single batteries, each single battery is provided with an explosion-proof valve, the battery explosion-proof valve air guide device comprises a main board, an air guide channel and a plurality of guide parts, the main board is used for being connected with the single battery, the air guide channel is arranged on the main board and is communicated with a drain opening of the explosion-proof valve, the air guide channel comprises an exhaust outlet, and the guide parts are communicated with the air guide channel and are used for guiding combustible substances drained by the explosion-proof valve to the exhaust outlet. Preferably, the flow guiding part comprises a non-return region and a guiding region, the non-return region is used for preventing the combustible substance from flowing in the opposite direction of the exhaust outlet and returning the combustible substance to the guiding region, and the guiding region is used for guiding the combustible substance to flow in the direction of the exhaust outlet. Preferably, the main board comprises a first end part, a second end part, a first face part and a first side edge, the air guide channel extends from the first end part towards the second end part, and the exhaust outlet penetrates through the first end part. Preferably, the guide area comprises a first arc-shaped section, the non-return portion area comprises a second arc-shaped section, one end of the first arc-shaped section is connected with the air guide channel, the other end of the first arc-shaped section is connected with the second arc-shaped section, the first arc-shaped section is bent towards the direction of the first side edge, one end of the second arc-shaped section is connected with the first arc-shaped section, the other end of the second arc-shaped section is connected with the air guide channel, and the second arc-shaped section is bent towards the direction of the second end part. Preferably, the guiding area further comprises a third arc-shaped section, the third arc-shaped section is symmetrically arranged with the first arc-shaped section, the non-return portion area further comprises a fourth arc-shaped section, the fourth arc-shaped section is symmetrically arranged with the second arc-shaped section, the guiding portion is provided with a heart-shaped groove, and the heart-shaped groove is communicated with the air guiding channel. Preferably, a flow dividing member is arranged between two adjacent flow guiding portions, and the flow dividing member is positioned in the air guiding channel and is used for dividing the combustible substance to two sides of the heart-shaped groove. Preferably, the diverter is triangular in shape, the vertex of the diverter faces the second end, and the opposite side of the diverter faces the first end. Preferably, the ma