Battery pack pressure relief air duct structure

Abstract

The application discloses a kind of battery pack pressure relief air duct structures, including battery pack, shell, explosion-proof valve, the battery pack, explosion-proof valve are installed in shell, the shell includes upper cover, bottom shell, the upper cover is fixedly connected with bottom shell by screw, the battery pack includes several electric core, support A, support B, cover plate A, cover plate B, support C, protection plate, the electric core limit eruption of the present application is effectively prevented;Effectively prevent the initial time high temperature carbonization of shell;The support A, support B are all equipped with several positive electrode eruption mouth, so that the support A, support B, cover plate A, cover plate B are erupted, and the temperature of eruption gas is reduced;Leading rib one side is long, and the other side is short, so that gas is preferentially guided to the side of explosion-proof valve;At the front end of support A and support B, pressure is released to the cavity formed by support C and protection plate, gas is preferentially started to explosion-proof valve position pressure, and the starting pressure of explosion-proof valve is reached.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery pack pressure relief air duct structure. BACKGROUND

[0002] With the progress and development of society, the intelligentization of storage, family, travel and the diversification of mobile consumer electronics, batteries as clean energy providers are increasingly sought after and favored by consumers, becoming an indispensable part of electronic products. In the application process, as the output end of energy, through the maintenance of the extreme state of the battery pack, especially the accidental eruption of the single cell, the spatter of high temperature electrolyte, the chain battery group burst eruption caused by heat accumulation, the shell of the whole battery pack bursts and burns, endangering the safety of the user. Timely balance of hot gas and export of hot gas, prevent the shell from bursting in the limit state, provide a favorable shell limit balancing system for the safety of the battery pack, provide more reassuring service, improve user recognition, the structure of the pressure relief air duct will become a very meaningful research topic. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a battery pack pressure relief air duct structure.

[0004] In order to achieve the above purpose, the present application is realized by the following technical scheme:

[0005] A battery pack pressure relief air duct structure, comprising a battery pack, a shell, and an explosion-proof valve, the battery pack and the explosion-proof valve are installed in the shell, the shell comprises an upper cover and a bottom shell, the upper cover is fixedly connected with the bottom shell through screws, the battery pack comprises a plurality of cells, a support A, a support B, a cover plate A, a cover plate B, a support C, and a protection plate, one end of the plurality of cells is inserted into the support A, the other end of the plurality of cells is inserted into the support B, the support A is fixedly connected with the support B, the cover plate A is fixed on the support A through screws, the cover plate B is fixed on the support B through screws, the cover plate A and the cover plate B are fixedly connected with the support C, the protection plate is fixedly connected with the support C, the support C is provided with an exhaust port on both sides, the support A and the support B are both provided with a plurality of isolation belts, a plurality of positive electrode eruption ports, a plurality of exhaust holes, and a plurality of guide ribs, both ends of the plurality of isolation belts are provided with pressure relief ports, the pressure relief ports and the plurality of exhaust holes located on the support A are at the edges and both ends of the support A, the pressure relief ports and the plurality of exhaust holes located on the support B are at the edges and both ends of the support B, and the guide ribs are located below the exhaust holes.

[0006] Preferably, the cover plate B is located directly above the cover plate A, and the support C is located on both sides of the cover plate A.

[0007] As preferred, the protection plate is located outside the bracket C.

[0008] As preferred, the isolation belt is S-shaped or straight or curved.

[0009] As preferred, the protection plate, the cover plate A, the cover plate B, the bracket A and the bracket B are made of high-temperature-resistant material.

[0010] As preferred, the pressure relief port is V-shaped.

[0011] As preferred, the plurality of positive electrode eruption ports are evenly distributed along the front end to the rear end of the isolation belt.

[0012] As preferred, the pressure relief port is located between the two adjacent exhaust holes.

[0013] As preferred, the length of one side of the guide rib is different from the length of the other side.

[0014] As preferred, the size of the exhaust port on the bracket C close to the explosion-proof valve is larger than the size of the exhaust port on the bracket C away from the explosion-proof valve.

[0015] The beneficial effects of the present application are as follows: according to the structure of the battery pack pressure relief air duct, the present application can estimate the gas volume in the shell, estimate the gas generated by the chemical composition of a single cell, estimate the exhaust gas generated by the temperature difference, and determine the type and specification of the selected explosion-proof valve; the present application is provided with an isolation belt, which effectively prevents the limit eruption of the cell; the cover plate A and the cover plate B are made of high-temperature-resistant material, which effectively prevents the initial high-temperature carbonization of the shell; the bracket A and the bracket B are provided with a plurality of positive electrode eruption ports, which make the eruption to the bracket A, the bracket B, the cover plate A and the cover plate B, and reduce the temperature of the eruption gas; the two ends of the plurality of isolation belts are provided with pressure relief ports, and the present application is provided with exhaust holes, which make it easier to increase the pressure relief channel and avoid direct shooting of adjacent cells; the present application is provided with a guide rib, and one side of the guide rib is long and the other side is short, so that the gas is preferentially guided to one side of the explosion-proof valve; at the front end of the bracket A and the bracket B, the pressure is released to the cavity formed by the bracket C and the protection plate, the exhaust port is provided on the bracket, the hole diameter of the exhaust port on the bracket C close to the explosion-proof valve is larger than the hole diameter of the exhaust port on the bracket C away from the explosion-proof valve, and the gas is preferentially started at the position of the explosion-proof valve to achieve the starting pressure of the explosion-proof valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a exploded structural schematic view of the cell and the bracket A;

[0017] Figure 2 It is a structural schematic view of the cell inserted into the bracket A;

[0018] Figure 3 It is a exploded structural schematic view of the cell, the bracket A and the bracket B;

[0019] Figure 4 Structure diagram of the battery pack;

[0020] Figure 5 Structure diagram of the battery pack;

[0021] Figure 6 Structure diagram of the battery pack;

[0022] Figure 7 Structure diagram of the battery pack;

[0023] Figure 8 Structure diagram of the battery pack;

[0024] Figure 9 Structure diagram of the battery pack;

[0025] Figure 10 Structure diagram of the battery pack;

[0026] Figure 11 Structure diagram of the battery pack;

[0027] Figure 12 Structure diagram of the battery pack;

[0028] Figure 13 Structure diagram of the battery pack;

[0029] Figure 14 Structure diagram of the battery pack;

[0030] Figure 15 Structure diagram of the battery pack; DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings of the specification:

[0032] As Figures 1 to 14As shown in the figure, a battery pack pressure relief air duct structure includes a battery pack, a shell 10, an explosion-proof valve 9, the battery pack and the explosion-proof valve 9 are installed in the shell 10, the shell 10 includes an upper cover 101 and a bottom shell 102, the upper cover 101 is fixedly connected with the bottom shell 102 through screws, the battery pack includes a plurality of battery cells 1, a support A 2, a support B 3, a cover plate A 5, a cover plate B 6, a support C 7 and a protection plate 8, one end of the plurality of battery cells 1 is inserted into the support A 2, the other end of the plurality of battery cells 1 is inserted into the support B 3, the support A 2 is fixedly connected with the support B 3, the cover plate A 5 is fixed on the support A 2 through screws 4, the cover plate B 6 is fixed on the support B 3 through screws 4, the cover plate A 5 and the cover plate B 6 are fixedly connected with the support C 7, the protection plate 8 is fixedly connected with the support C 7, both sides of the support C 7 are provided with exhaust ports 71, the support A 2 and the support B 3 are both provided with a plurality of isolation bands 22, a plurality of positive electrode ejection ports 25, a plurality of exhaust holes 23 and a plurality of guide ribs 21, both ends of the plurality of isolation bands 22 are provided with pressure relief ports 24, the pressure relief ports 24 and the plurality of exhaust holes 23 located on the support A 2 are at the edges and both ends of the support A 2, the pressure relief ports 24 and the plurality of exhaust holes 23 located on the support B 3 are at the edges and both ends of the support B 3, and the guide ribs 21 are located below the exhaust holes 23.

[0033] As shown in the figure, Figure 7 The cover plate B 6 is located directly above the cover plate A 5, the support C 7 is located on both sides of the cover plate A 5, and the protection plate 8 is located on the outside of the support C 7.

[0034] As shown in the figure, Figure 11 The isolation band 22 is S-shaped, and the isolation band 22 can also be straight or curved.

[0035] As shown in the figure, Figures 1 to 14 The protection plate 8, the cover plate A 5, the cover plate B 6, the support A 2 and the support B 3 are made of high-temperature resistant materials.

[0036] As shown in the figure, Figure 11 The pressure relief port 24 is V-shaped.

[0037] As shown in the figure, Figure 11 , Figure 14 The plurality of positive electrode ejection ports 25 are evenly distributed along the front end to the rear end of the isolation band 22.

[0038] As shown in the figure, Figure 11 The pressure relief port 24 is located between two adjacent exhaust holes 23.

[0039] As shown in the figure, Figure 11 , Figure 4 The length of one side of the guide rib 21 is different from the length of the other side.

[0040] As​​Figure 12 、 Figure 13 As shown in the drawings, the size of the exhaust port 71 on the support C7 close to the explosion-proof valve 9 is greater than the size of the exhaust port 71 on the support C7 away from the explosion-proof valve 9.

[0041] Assembly process:

[0042] First step: as shown in the drawings, several battery cells are loaded into the support A; Figure 1 、 Figure 2 Second step: as shown in the drawings, the support B is loaded into the end face of the battery cell, and the screw is fixed between the support A and the support B;

[0043] Third step: as shown in the drawings, the support A side is loaded into the cover plate A and the screw is tightened, and the support B side is loaded into the cover plate B and the screw is tightened; Figure 3 、 Figure 4 Fourth step: as shown in the drawings, the side is loaded into the support C and the screw is tightened, and the protection plate is loaded into the support C and the screw is tightened;

[0044] Fifth step: as shown in the drawings, the battery pack and the explosion-proof valve are loaded into the shell 10, and the assembly of the application is completed. Figure 5 、 Figure 6 The present application extracts the volume of the gas in the shell, estimates the volume of the gas in the shell, estimates the gas generated by the chemical composition of the single battery cell, estimates the exhaust gas generated by the temperature difference, and determines the type and specification of the selected explosion-proof valve. The estimation of the gas in the battery pack shell is after the discharge of solid matter. The gas generated by the chemical composition of the battery cell is the reference data provided by the battery cell factory. According to the ideal gas balance gas equation shown in the drawings, the gas pressure and the required gas release rate are shown in Table 1. The volume of the gas changes or the type of the battery cell changes, and the type needs to be corrected and reselected according to the demand; 、

[0045] Table 1 is a table of gas pressure and required gas release rate. Figure 7 、 Figure 8 Table 1: 、

[0046] Figure 9 、 Figure 10 、

[0047] The support A and the support B have respectively grouped and blocked the battery cell, and the isolation belt is designed to prevent the limit burst of the battery cell. Figure 15 、

[0048] Table 1 is a table of gas pressure and required gas release rate. 、

[0049] Table 1: 、

[0050]

[0051]

[0052] The support A and the support B have respectively grouped and blocked the battery cell, and the isolation belt is designed to prevent the limit burst of the battery cell.

[0053] The S-shaped isolation belt provided by the support A and the support B is designed according to the arrangement of the battery cell, and can be linear, curved or other required shapes;

[0054] The cover plate A and the cover plate B can be made of temperature-resistant materials such as aluminum alloy and carbon steel, and the shape is arranged according to the requirement of the battery pack, and is not limited to rectangular, circular or other shapes;

[0055] The support A and the support B are provided with a plurality of positive electrode spray ports, so that the support A, the support B, the cover plate A and the cover plate B are sprayed, and the temperature of the sprayed gas is reduced;

[0056] The pressure relief port 24 is V-shaped and is not limited to a curved surface or other guide shape, and the angle size is preferably adjusted to correspond to the adjacent first spray port, and the angle size is not specially limited;

[0057] The guide rib is long on one side and short on the other side, which preferentially guides the gas to one side of the explosion-proof valve, and the length of the guide rib is not specially limited in height, and the length and height are adjusted according to the actual use space, but the form must be one long rib and one short rib;

[0058] The extraction is at the front end of the support A and the support B, and the pressure is released to the cavity formed by the support C and the protection plate, and left and right exhaust holes are respectively arranged on the protection plate support, the size of the exhaust port close to the explosion-proof valve side is greater than that of the exhaust port away from the explosion-proof valve side, the gas pressure is preferentially started at the position of the explosion-proof valve, and the starting pressure of the explosion-proof valve is reached;

[0059] The shape of the exhaust port can be a round hole, a square hole or other shapes.

[0060] The present application can estimate the gas volume in the shell according to the structure of the battery pack pressure relief air duct, estimate the gas generated by the chemical composition of a single battery cell, estimate the exhaust gas generated by the temperature difference, and determine the type and specification of the selected explosion-proof valve; the present application is provided with an isolation belt, which effectively prevents the limit spray of the battery cell; the cover plate A and the cover plate B are made of high-temperature resistant materials, which effectively prevent the initial high-temperature carbonization of the shell; the support A and the support B are provided with a plurality of positive electrode spray ports, so that the support A, the support B, the cover plate A and the cover plate B are sprayed, and the temperature of the sprayed gas is reduced; the two ends of the plurality of isolation belts are provided with pressure relief ports, and the present application is provided with exhaust holes, so as to increase the pressure relief channel and avoid direct shooting of adjacent battery cells; the present application is provided with a guide rib, and one side of the guide rib is long and the other side is short, so that the gas is preferentially guided to one side of the explosion-proof valve; the extraction is at the front end of the support A and the support B, and the pressure is released to the cavity formed by the support C and the protection plate, and the exhaust port is arranged on the support, the hole diameter of the exhaust port on the support C close to the explosion-proof valve side is greater than that of the exhaust port on the support C away from the explosion-proof valve side, the gas pressure is preferentially started at the position of the explosion-proof valve, and the starting pressure of the explosion-proof valve is reached.

[0061] It should be noted that the above only lists one specific embodiment of the present application. Obviously, the present application is not limited to the above embodiment, and there are many variations. In general, all variations that can be directly derived or inferred from the disclosed content by those of ordinary skill in the art should be considered within the scope of the present application.

Claims

1. A battery pack pressure relief air duct structure characterized by, The application relates to a battery pack, a shell (10) and an explosion-proof valve (9), wherein the battery pack and the explosion-proof valve (9) are installed in the shell (10), the shell (10) comprises an upper cover (101) and a bottom shell (102), the upper cover (101) is fixedly connected with the bottom shell (102) through screws, the battery pack comprises a plurality of battery cells (1), a support A (2), a support B (3), a cover plate A (5), a cover plate B (6), a support C (7) and a protection plate (8), one end of the plurality of battery cells (1) is inserted into the support A (2), the other end of the plurality of battery cells (1) is inserted into the support B (3), the support A (2) is fixedly connected with the support B (3), the cover plate A (5) is fixed on the support A (2) through screws (4), the cover plate B (6) is fixed on the support B (3) through screws (4), the cover plate A (5), the cover plate B (6) and the protection plate (8) are fixedly connected with the support C (7), the cover plate B (6) is located directly above the cover plate A (5), the support C (7) is located on both sides of the cover plate A (5), the protection plate (8) is located outside the support C (7), the explosion-proof valve (9) is located at one end of the support C (7), the support C (7) is provided with exhaust ports (71) at one end facing the explosion-proof valve (9) and one end away from the explosion-proof valve (9), the size of the exhaust port (71) at the one end facing the explosion-proof valve (9) is larger than that of the exhaust port (71) at the one end away from the explosion-proof valve (9), the support A (2) and the support B (3) are provided with a plurality of isolation belts (22), a plurality of positive electrode spray ports (25), a plurality of exhaust holes (23) and a plurality of guide ribs (21), one end of the isolation belt (22) faces the support C (7), the other end of the isolation belt (22) is away from the support C (7), both ends of the plurality of isolation belts (22) are provided with pressure relief ports (24), the pressure relief ports (24) and the plurality of exhaust holes (23) located on the support A (2) are arranged at the edges and both ends of the support A (2), the pressure relief ports (24) and the plurality of exhaust holes (23) located on the support B (3) are arranged at the edges and both ends of the support B (3), the guide rib (21) is located below the exhaust hole (23), the pressure relief port (24) is located between two adjacent exhaust holes (23), the length of one side of the guide rib (21) is long and the length of the other side of the guide rib (21) is short, so that the gas is preferentially guided to the explosion-proof valve (9), the isolation belt (22) is in S shape or straight line shape, and the pressure relief port (24) is in V shape; the plurality of positive electrode spray ports (25) are uniformly distributed along one end to the other end of the isolation belt (22).

2. The battery pack pressure relief air duct structure according to claim 1, wherein The protection plate (8), the cover plate A (5), the cover plate B (6), the support A (2) and the support B (3) are made of high-temperature-resistant materials.

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