Flame-retardant explosion-proof battery module with high safety

Abstract

The utility model discloses a flame-retardant explosion-proof battery module with high safety, relates to the technical field of battery modules, and solves the problem that the pressure intensity in the battery module is too high, the flame-retardant explosion-proof battery module comprises a connecting shell, the inner wall of the connecting shell is fixedly connected with a cooling mechanism, and the upper surface of the cooling mechanism is fixedly connected with an explosion-proof mechanism and a cooling mechanism; comprising a cooling pipeline fixedly connected to the inner wall of the connecting shell, and one end of the cooling pipeline penetrates through the outer surface of the connecting shell and is fixedly connected with a liquid drainage header pipe. According to the battery pack, the flame retardant in the flame-retardant colloid is decomposed at high temperature to generate gas, so that the pressure and problems in the sealing frame are increased, when the temperature of the battery pack body is too high and the temperature sensor reaches a threshold value, information is transmitted to the battery manager, so that the battery pack body stops working, and meanwhile, the pressure release valve is automatically started; part of gas is released, internal pressure is reduced, explosion of the sealing frame is prevented, and the safety performance is improved to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a flame-retardant and explosion-proof battery module with high safety. Background Art

[0002] The battery module can be understood as an intermediate product between the battery cell and the pack formed by combining lithium-ion battery cells in series and parallel and adding a single-cell battery monitoring and management device.

[0003] The Chinese utility model with announcement number CN217983479U discloses a battery module with explosion-proof and flame-retardant functions. External coolant can be introduced through a coolant pipe, and then the coolant will first flow into the serpentine cooling tube to absorb and take away the heat generated at the bottom of the battery cell. Then the coolant will continue to move, pass through the serpentine cooling tube, flow into the flow tube, introduce the heat generated by the battery cell through the heat dissipation holes, and then absorb and take away through the flow tube to achieve cooling and cooling operations on the sides of the battery cell. The coolant that has absorbed a large amount of heat will eventually flow out through another set of coolant pipes, so that the whole can form a complete set of heat dissipation circulation structure, improve the overall heat dissipation effect, ensure the use effect of the battery cell, and have the advantage of good heat dissipation effect.

[0004] Although the above technical solution improves the overall heat dissipation effect during use, when the batteries in the battery module accidentally burn, the pressure inside the battery module will be too high. If the pressure is not relieved in time, the battery module may explode. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the problems existing in the above-mentioned prior art, the utility model provides a flame-retardant and explosion-proof battery module with high safety.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a flame-retardant and explosion-proof battery module with strong safety, comprising a connecting shell, the inner wall of the connecting shell is fixedly connected to a cooling mechanism, the upper surface of the cooling mechanism is fixedly connected to an explosion-proof mechanism, the cooling mechanism comprises a cooling pipe fixedly connected to the inner wall of the connecting shell, one end of the cooling pipe passes through the outer surface of the connecting shell and is fixedly connected to a drainage main pipe, and the upper surface of the cooling pipe is fixedly connected to multiple groups of battery pack bodies, and the explosion-proof mechanism comprises a flame-retardant colloid fixedly connected to the upper surface of the cooling pipe, and the lower surface of the flame-retardant colloid is fixedly connected to the upper surface of the connecting shell.

[0009] As a preferred solution of the water inlet pipe regulating assembly for the pump station of the utility model, the outer surface of the flame retardant colloid is fixedly connected to a sealing frame, the lower surface of the sealing frame is fixedly connected to the inner wall of the connecting shell, and the outer surface of the connecting shell is fixedly connected to a sealing cover.

[0010] By adopting the above technical solution, the battery pack body can be easily separated into separate spaces by the sealing frame and the sealing cover, thereby preventing the situation where one battery pack body catches fire and causes harm to the surrounding battery pack bodies.

[0011] As a preferred solution of the water inlet pipe regulating assembly for the pump station of the utility model, a through hole is opened on the upper surface of the sealing cover corresponding to the position of the battery pack body, a pressure relief valve and a temperature sensor are fixedly connected to the inner wall of the through hole, and a protective shell is fixedly connected to the upper surface of the sealing cover.

[0012] By adopting the above technical solution, the temperature of the battery pack body can be easily detected by the temperature sensor, and the excess pressure of the protective shell can be discharged through the pressure relief valve to avoid the explosion of the sealing frame.

[0013] As a preferred solution of the water inlet pipe regulating assembly for the pump station of the utility model, a fireproof cover is arranged below the temperature sensor and the pressure relief valve, and the outer surface of the fireproof cover is fixedly connected to the inner side surface of the through hole.

[0014] By adopting the above technical solution, the fireproof cover can prevent the flame from rising and causing the temperature sensor and the pressure relief valve to be burned.

[0015] As a preferred solution of the water inlet pipe regulating assembly for the pump station of the utility model, one end of the cooling pipe away from the drainage main pipe is fixedly connected to the liquid inlet main pipe, the inner wall of the liquid inlet main pipe is fixedly connected to the liquid outlet of the water pump, and the liquid inlet of the water pump is fixedly connected to a liquid storage tank, the inner wall of the liquid storage tank is fixedly connected to an infusion pipe, and the other end of the infusion pipe is fixedly connected to the inner wall of the drainage main pipe.

[0016] By adopting the above technical solution, the coolant in the liquid storage tank can be pumped into the cooling pipe by a water pump, so as to dissipate heat to the battery pack body in the connection shell.

[0017] As a preferred solution of the water inlet pipe regulating assembly for the pump station of the utility model, a heat dissipation frame is fixedly connected to the upper surface of the cooling pipe, the inner side surface of the heat dissipation frame is fitted with the outer surface of the battery pack body, and the outer surfaces of the connecting shell and the liquid storage tank are fixedly connected with multiple groups of mounting blocks.

[0018] By adopting the above technical solution, the heat generated by the battery pack body can be easily transferred to the outer surface of the cooling pipe through the heat dissipation frame.

[0019] (III) Beneficial effects

[0020] The utility model provides a flame-retardant and explosion-proof battery module with strong safety. It has the following beneficial effects:

[0021] 1. The flame retardant in the flame retardant colloid decomposes at high temperature to produce gas, which increases the pressure and pressure inside the sealing frame. When the temperature of the battery pack body is too high, the temperature sensor reaches the threshold and transmits information to the battery manager to stop the battery pack body from working. At the same time, the pressure relief valve will automatically start to release part of the gas, reduce the internal pressure, and prevent the sealing frame from exploding, thereby improving the safety performance to a certain extent.

[0022] 2. By starting the water pump, the water pump pumps the coolant in the liquid storage tank into the liquid inlet main pipe, and then flows from the liquid inlet main pipe to the cooling pipe. At the same time, the heat dissipation frame can transfer the heat generated by the battery pack body, so that the coolant can take away the heat of the battery pack body. The coolant with heat flows into the drain main pipe, and then flows back to the liquid storage tank through the infusion pipe for cooling, so as to continuously cool the battery pack body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a front cross-sectional structural schematic diagram of the entire utility model.

[0026] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of A.

[0027] Figure 4 It is a schematic diagram of the top cross-sectional structure of the connecting shell in the utility model.

[0028] In the figure, 1. connecting shell; 2. cooling mechanism; 201. drain main pipe; 202. liquid inlet main pipe; 203. water pump; 204. heat dissipation frame; 205. cooling pipe; 206. infusion pipe; 207. liquid storage tank; 3. explosion-proof mechanism; 301. protective shell; 302. sealing frame; 303. flame retardant colloid; 304. fireproof cover; 305. temperature sensor; 306. pressure relief valve; 307. sealing cover; 308. through hole; 4. mounting block; 5. battery pack body. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] Example 1

[0031] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 , which is the first embodiment of the utility model, and this embodiment provides a flame-retardant and explosion-proof battery module with strong safety, including a connecting shell 1, the inner wall of the connecting shell 1 is fixedly connected with a cooling mechanism 2, the upper surface of the cooling mechanism 2 is fixedly connected with an explosion-proof mechanism 3, and the explosion-proof mechanism 3 includes a flame-retardant colloid 303 fixedly connected to the upper surface of the cooling pipe 205, and the lower surface of the flame-retardant colloid 303 is fixedly connected to the upper surface of the connecting shell 1.

[0032] Specifically, the outer surface of the flame retardant colloid 303 is fixedly connected to a sealing frame 302, the lower surface of the sealing frame 302 is fixedly connected to the inner wall of the connecting shell 1, and the outer surface of the connecting shell 1 is fixedly connected to a sealing cover 307, wherein the flame retardant colloid 303 is made of trialkylphosphine oxide material, and a through hole 308 is opened on the upper surface of the sealing cover 307 corresponding to the position of the battery pack body 5, and the inner wall of the through hole 308 is fixedly connected to a pressure relief valve 306 and a temperature sensor 305, and the upper surface of the sealing cover 307 is fixedly connected to the protective shell 301, and a fireproof cover 304 is arranged below the temperature sensor 305 and the pressure relief valve 306, and the outer surface of the fireproof cover 304 is fixedly connected to the inner side of the through hole 308.

[0033] Further, the flame retardant in the flame retardant colloid 303 decomposes at high temperature to produce gas, which increases the pressure and pressure inside the sealing frame 302. When the temperature of the battery pack body 5 is too high, the temperature sensor 305 reaches the threshold and transmits information to the battery manager to stop the battery pack body 5 from working. At the same time, the pressure relief valve 306 will automatically start to release part of the gas, reduce the internal pressure, and prevent the sealing frame 302 from exploding.

[0034] Example 2

[0035] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment. The cooling mechanism 2 includes a cooling pipe 205 fixedly connected to the inner wall of the connecting shell 1, one end of the cooling pipe 205 passes through the outer surface of the connecting shell 1 and is fixedly connected to a drainage main pipe 201, and the upper surface of the cooling pipe 205 is fixedly connected to multiple battery pack bodies 5.

[0036] Specifically, one end of the cooling pipe 205 away from the drainage main pipe 201 is fixedly connected to the liquid inlet main pipe 202, the inner wall of the liquid inlet main pipe 202 is fixedly connected to the liquid outlet of the water pump 203, and the liquid inlet of the water pump 203 is fixedly connected to the liquid storage tank 207, the inner wall of the liquid storage tank 207 is fixedly connected to the infusion pipe 206, and the other end of the infusion pipe 206 is fixedly connected to the inner wall of the drainage main pipe 201, wherein the water pump 203 is fixedly connected to the outer surface of the connecting shell 1, and the upper surface of the cooling pipe 205 is fixedly connected to the heat dissipation frame 204, the inner side surface of the heat dissipation frame 204 is in contact with the outer surface of the battery pack body 5, and the outer surfaces of the connecting shell 1 and the liquid storage tank 207 are fixedly connected to multiple groups of mounting blocks 4.

[0037] The water pump 203 is further started, and the water pump 203 pumps the coolant in the liquid storage tank 207 into the liquid inlet main pipe 202, and then flows from the liquid inlet main pipe 202 to the cooling pipe 205. At the same time, the heat dissipation frame 204 can transfer the heat generated by the battery pack body 5, so that the coolant can take away the heat of the battery pack body 5, and the coolant with heat flows into the drain main pipe 201, and then flows back to the liquid storage tank 207 through the infusion pipe 206 for cooling, so as to continuously cool the battery pack body 5.

[0038] Working principle: When in use, start the water pump 203, the water pump 203 pumps the coolant in the liquid storage tank 207 into the liquid inlet main pipe 202, and then flows from the liquid inlet main pipe 202 to the cooling pipe 205. At the same time, the heat dissipation frame 204 can transfer the heat emitted by the battery pack body 5, so that the coolant can take away the heat of the battery pack body 5. The coolant with heat flows into the drain main pipe 201, and then flows back to the liquid storage tank 207 through the infusion pipe 206 for cooling, so as to continuously cool the battery pack body 5. When a collision or accident occurs and causes the battery pack body 5 to catch fire, the flame retardant in the flame retardant colloid 303 decomposes at high temperature to produce gas, which can react with free radicals or oxides in the combustion process. , forming an inert atmosphere and reducing the oxygen supply, thereby suppressing the spread of flames, increasing the pressure in the sealing frame 302, and then the pressure relief valve 306 automatically starts to discharge the excess gas in the sealing frame 302, thereby avoiding the excessive pressure in the sealing frame 302, which causes the sealing frame 302 to deform or even explode. When the temperature of the battery pack body 5 is too high, the temperature sensor 305 reaches the threshold and transmits information to the battery manager to stop the battery pack body 5 from working. When the internal pressure increases due to overheating of the battery assembly body 5 or other abnormal conditions, the pressure relief valve 306 will automatically start to release part of the gas, reduce the internal pressure, and prevent the container from exploding.

[0039] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A flame-retardant and explosion-proof battery module with high safety, comprising a connecting shell (1), characterized in that: The inner wall of the connecting shell (1) is fixedly connected to a cooling mechanism (2), and the upper surface of the cooling mechanism (2) is fixedly connected to an explosion-proof mechanism (3); A cooling mechanism (2) comprising a cooling pipe (205) fixedly connected to the inner wall of the connecting shell (1), one end of the cooling pipe (205) passing through the outer surface of the connecting shell (1) and fixedly connected to a drainage main pipe (201), and the upper surface of the cooling pipe (205) is fixedly connected to a plurality of battery pack bodies (5); The explosion-proof mechanism (3) comprises a flame-retardant colloid (303) fixedly connected to the upper surface of the cooling pipe (205), and the lower surface of the flame-retardant colloid (303) is fixedly connected to the upper surface of the connecting shell (1).

2. A flame-retardant and explosion-proof battery module with high safety according to claim 1, characterized in that: The outer surface of the flame retardant colloid (303) is fixedly connected to a sealing frame (302), the lower surface of the sealing frame (302) is fixedly connected to the inner wall of the connecting shell (1), and the outer surface of the connecting shell (1) is fixedly connected to a sealing cover (307).

3. A flame-retardant and explosion-proof battery module with high safety according to claim 2, characterized in that: A through hole (308) is provided on the upper surface of the sealing cover (307) at a position corresponding to the battery pack body (5); a pressure relief valve (306) and a temperature sensor (305) are fixedly connected to the inner wall of the through hole (308); and a protective shell (301) is fixedly connected to the upper surface of the sealing cover (307).

4. A flame-retardant and explosion-proof battery module with high safety according to claim 3, characterized in that: A fireproof cover (304) is provided below the temperature sensor (305) and the pressure relief valve (306), and the outer surface of the fireproof cover (304) is fixedly connected to the inner side surface of the through hole (308).

5. The flame-retardant and explosion-proof battery module with high safety according to claim 1, characterized in that: One end of the cooling pipe (205) away from the drainage main pipe (201) is fixedly connected to the liquid inlet main pipe (202), the inner wall of the liquid inlet main pipe (202) is fixedly connected to the liquid outlet of the water pump (203), and the liquid inlet of the water pump (203) is fixedly connected to a liquid storage tank (207), the inner wall of the liquid storage tank (207) is fixedly connected to a liquid infusion pipe (206), and the other end of the liquid infusion pipe (206) is fixedly connected to the inner wall of the drainage main pipe (201).

6. A flame-retardant and explosion-proof battery module with high safety according to claim 5, characterized in that: The upper surface of the cooling pipe (205) is fixedly connected to a heat dissipation frame (204), the inner side surface of the heat dissipation frame (204) is in contact with the outer surface of the battery pack body (5), and the outer surfaces of the connecting shell (1) and the liquid storage tank (207) are fixedly connected to multiple groups of mounting blocks (4).

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