Lithium battery pack with fire extinguishing function

Abstract

The utility model discloses a lithium battery pack with a fire extinguishing function in the technical field of lithium battery packs, which comprises an explosion-proof shell, a cover plate and a battery component, a connecting plate is fixedly connected to the upper end of the explosion-proof shell, the middle of the connecting plate is hollow and is communicated with the explosion-proof shell in a penetrating manner, and a motor component is arranged in the explosion-proof shell and is fixedly connected with the cover plate. And the cover plate is connected to the upper end of the explosion-proof shell. The lithium battery protection device has the advantages that the protection plates are arranged between the lithium batteries, the dry powder is arranged in the protection plates, the protection plates are hot-melted after a fire breaks out to enable the dry powder to be emitted to extinguish the fire, meanwhile, inert gas is arranged in the gas storage shell at the upper end of the cover plate, and eruption extinguishment is conducted through sensing of the smoke sensor. And the lower end of the anti-explosion shell can promote oxygen in the mounting groove to be erupted and discharged out of the mounting groove, inert gas is promoted to be dispersed in the mounting groove for fire extinguishing, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery packs, in particular to a lithium battery pack with a fire extinguishing function. Background Art

[0002] With the development of the new energy industry, two-wheeled electric vehicles and electric vehicles are becoming more and more popular, but electric vehicle battery fires also occur frequently, so the safety performance of electric vehicles has received great attention. However, batteries are affected by many factors, among which the impact of battery thermal runaway is very huge, and it is very likely that the fire will spread inside or outside the battery pack, that is, the internal fire will affect the safety of the vehicle and members outside the battery pack, or the vehicle fire will spread to the inside of the battery pack, causing the battery cells and battery modules in the battery pack to catch fire and explode, making the dangerous situation more serious.

[0003] In the prior art, a Chinese patent with patent number CN206422120U discloses a box and a battery pack, wherein the box includes an upper box and a lower box matched with the upper box. The upper box includes an outer shell and a hydrogel lining disposed inside the outer shell. The device can only prevent the spread of fire to a certain extent and prevent the battery pack from burning and exploding quickly, but cannot extinguish the fire at the starting point. Utility Model Content

[0004] In order to solve the above-mentioned problems, the utility model provides a lithium battery pack with a fire extinguishing function. In the device, a protective plate is provided between the lithium batteries, and dry powder is provided in the protective plate. After a fire occurs, the protective plate is heat-melted to disperse the dry powder for fire extinguishing. At the same time, an inert gas is provided in the gas storage shell at the upper end of the cover plate, which is sensed by a smoke sensor to spray and extinguish the fire, and the lower end of the explosion-proof shell can promote the oxygen in the installation groove to spray and discharge it into the installation groove, thereby promoting the inert gas to be dispersed in the installation groove for fire extinguishing.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] A lithium battery pack with a fire extinguishing function comprises an explosion-proof shell, a cover plate and a battery assembly, wherein a connecting plate is fixedly connected to the upper end of the explosion-proof shell, the middle part of the connecting plate is hollow and penetrates and communicates with the explosion-proof shell, the battery assembly is arranged in the explosion-proof shell, the cover plate is connected to the upper end of the explosion-proof shell, the battery assembly comprises a lithium battery body, a positive connecting plate and a negative connecting plate, a protrusion is provided at one end of the several lithium battery bodies, a first groove is provided on the positive connecting plate, the protrusion is plugged and adapted in the first groove, a plurality of connecting grooves are provided on the negative connecting plate, the other end of the lithium battery body is plugged and adapted in the connecting groove, a protrusion is provided on the inner wall of the connecting groove, a second groove is provided at the other end of the lithium battery body, and the protrusion is plugged and adapted in the second groove.

[0007] Furthermore, a plurality of protective plates are fixedly connected in the explosion-proof shell, and mounting grooves are set between the protective plates. A plurality of lithium batteries are arranged in groups in each mounting groove. A plurality of lithium battery bodies are provided with fixing parts in the vertical direction, and the fixing parts are slidably arranged in the mounting grooves.

[0008] Furthermore, the positive connecting plate and the negative connecting plate are respectively slidably connected to the two sides of the protective plate in the installation groove, and limit bars are provided at both ends of the protective plate. The positive connecting plate and the negative connecting plate are both provided with a plurality of limit grooves, and the limit bars are slidably connected to the limit grooves.

[0009] Furthermore, the protective plate is hollow inside and is provided with dry powder.

[0010] Furthermore, a gas storage shell is fixedly connected to the upper end of the cover plate, a gas storage tank is arranged inside the gas storage shell, inert gas is stored in the gas storage tank, a ventilation channel is arranged in the cover plate, the ventilation channel is connected to the lower end of the gas storage tank, the lower end of the ventilation channel is connected to a gas transmission channel, the lower end of the gas transmission channel is connected to a plurality of gas outlet channels, the gas outlet channels run through the lower end of the cover plate, and a first control valve is arranged on the ventilation channel.

[0011] Furthermore, a plurality of smoke sensors are fixedly connected to the lower end of the cover plate, and the smoke sensors are arranged at the upper end of each mounting groove.

[0012] Furthermore, a plurality of exhaust channels are provided in the explosion-proof shell, the exhaust channels run through both sides of the explosion-proof shell, the upper end of each exhaust channel is connected with a connecting channel, the connecting channel is connected to the lower end of the mounting groove, and a second control valve is provided on the connecting channel.

[0013] The beneficial effects achieved by the utility model using the above structure are as follows:

[0014] In the embodiment of the utility model, a gas storage shell is provided at the upper end of the cover plate, in which inert gas is stored, and a smoke sensor is provided at the lower end of the cover plate. Through the induction of the smoke sensor, the first control valve controls the inert gas in the gas storage shell to be sprayed from the gas outlet pipe into the installation groove to extinguish the fire of the lithium battery body in the installation groove. At the same time, an exhaust channel is provided at the lower end of the explosion-proof shell, and the oxygen in the installation groove is discharged into the installation groove through the second control valve, thereby promoting the inert gas to spread in the installation groove and thus realizing fire extinguishing. At the same time, dry powder is provided in the protective plate. When the protective plate is hot-melted, the dry powder is spread in the installation groove to further improve the fire extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the whole machine of the utility model.

[0016] Figure 2 It is an exploded view of the utility model.

[0017] Figure 3It is a schematic diagram of the cover plate of the present utility model.

[0018] Figure 4 This is a cross-sectional view of the cover plate connection of the utility model.

[0019] Figure 5 This is a schematic diagram of the lithium battery body of the present utility model.

[0020] Figure 6 It is a schematic diagram of the positive electrode connecting plate of the utility model.

[0021] Figure 7 It is a schematic diagram of the negative electrode connecting plate of the present utility model.

[0022] Figure 8 It is a schematic diagram of the explosion-proof shell of the utility model.

[0023] Fig. 9 It is a cross-sectional view of the explosion-proof shell of the utility model.

[0024] Description of reference numerals:

[0025] 1. Explosion-proof shell, 101. Protective plate, 102. Limiting strip, 103. Mounting groove, 104. Exhaust channel, 105. Connecting channel, 106. Second control valve, 107. Dry powder, 2. Connecting plate, 3. Cover plate, 301. Gas storage shell, 302. Gas outlet channel, 303. Gas transmission channel, 304. Ventilation channel, 305. First control valve, 306. Gas storage tank, 307. Smoke sensor, 4. Battery assembly, 401. Lithium battery body, 402. Second groove, 403. Protrusion, 404. Fixing part, 405. Positive connecting plate, 406. First groove, 407. Limiting groove, 408. Negative connecting plate, 409. Connecting groove, 410. Protrusion. DETAILED DESCRIPTION

[0026] like Figure 1-9As shown, a lithium battery pack with fire extinguishing function includes an explosion-proof shell 1, a cover plate 3 and a battery assembly 4, the upper end of the explosion-proof shell 1 is fixedly connected with a connecting plate 2, the middle of the connecting plate 2 is hollow and penetrates and communicates with the explosion-proof shell 1, the battery assembly 4 is arranged in the explosion-proof shell 1, the cover plate 3 is connected to the upper end of the explosion-proof shell 1, the battery assembly 4 includes a lithium battery body 401, a positive electrode connecting plate 405 and a negative electrode connecting plate 408, and one end of the several lithium battery bodies 401 is provided with a convex The protrusion 403 is provided on the positive electrode connecting plate 405, and the first groove 406 is provided. The protrusion 403 is inserted and adapted in the first groove 406. The negative electrode connecting plate 408 is provided with a plurality of connecting grooves 409. The other end of the lithium battery body 401 is inserted and adapted in the connecting groove 409. The inner wall of the connecting groove 409 is provided with a protrusion 410. The other end of the lithium battery body 401 is provided with a second groove 402. The protrusion 410 is inserted and adapted in the second groove 402.

[0027] In order to fix the lithium battery bodies 401 in groups in the explosion-proof shell 1, a plurality of protective plates 101 are fixedly connected in the explosion-proof shell 1, and mounting grooves 103 are set between the protective plates 101. A plurality of lithium batteries are arranged in groups in each mounting groove 103. A fixing piece 404 is sleeved on the plurality of lithium battery bodies 401 in the vertical direction, and the fixing piece 404 is slidably arranged in the mounting groove 103. The positive electrode connecting plate 405 and the negative electrode connecting plate 408 are respectively slidably connected to the two sides of the protective plate 101 in the mounting groove 103. Limiting bars 102 are provided at both ends of the protective plate 101. A plurality of limiting grooves 407 are provided on the positive electrode connecting plate 405 and the negative electrode connecting plate 408. The limiting bars 102 are slidably connected to the limiting grooves 407. The protective plate 101 is hollow inside and provided with dry powder 107 for fire extinguishing.

[0028] In order to use gas for fire extinguishing, a gas storage shell 301 is fixedly connected to the upper end of the cover plate 3, and a gas storage tank 306 is set inside the gas storage shell 301. Inert gas is stored in the gas storage tank 306. A ventilation channel 304 is provided in the cover plate 3. The ventilation channel 304 is connected to the lower end of the gas storage tank 306. The lower end of the ventilation channel 304 is connected to a gas transmission channel 303. The lower end of the gas transmission channel 303 is connected to a plurality of gas outlet channels 302. The gas outlet channels 302 pass through the lower end of the cover plate 3. A first control valve 305 is provided on the ventilation channel 304. A plurality of smoke sensors 307 are fixedly connected to the lower end of the cover plate 3. The smoke sensors 307 are arranged at the upper end of each mounting groove 103.

[0029] In order to promote the efficiency of gas fire extinguishing, a plurality of exhaust channels 104 are provided in the explosion-proof shell 1. The exhaust channels 104 run through both sides of the explosion-proof shell 1. The upper end of each exhaust channel 104 is connected to a connecting channel 105. The connecting channel 105 is connected to the lower end of the mounting groove 103. A second control valve 106 is provided on the connecting channel 105.

[0030] When the utility model is in use, the lithium battery body 401 is connected into a group through the fixing member 404 and then installed between the positive connecting plate 405 and the negative connecting plate 408. The battery assembly 4 is installed in the explosion-proof shell 1 as a whole and is closed by the cover plate 3. The upper end of the cover plate 3 is fixedly connected to the gas storage shell 301, and the gas storage shell 301 is provided with inert gas. The lower end of the cover plate 3 is provided with a smoke sensor 307. The smoke sensor 307 senses the installation groove 103. If there is a fire, the first control valve 3 05 controls the inert gas in the gas storage shell 301 to be discharged from the gas outlet channel 302 to the installation groove 103 for fire extinguishing. At the same time, the lower end of the explosion-proof shell 1 controls the original oxygen-containing gas in the explosion-proof shell 1 to be discharged from the explosion-proof shell 1 through the second control valve 106, thereby promoting the inert gas to spread in the installation groove 103 for fire extinguishing, thereby improving the fire extinguishing efficiency. If the protective plate 101 in the explosion-proof shell 1 is melted after the fire occurs, the dry powder 107 in the protective plate 101 will be scattered in the installation groove 103 for further fire extinguishing.

[0031] In summary: In the embodiment of the utility model, a gas storage shell 301 is provided at the upper end of the cover plate 3, and inert gas is stored in the gas storage shell 301, and a smoke sensor 307 is provided at the lower end of the cover plate 3. Through the induction of the smoke sensor 307, the first control valve 305 controls the inert gas in the gas storage shell 301 to be sprayed from the outlet pipe to the installation groove 103 to extinguish the lithium battery body 401 in the installation groove 103. At the same time, an exhaust channel 104 is provided at the lower end of the explosion-proof shell 1, and the oxygen in the installation groove 103 is discharged from the installation groove 103 through the second control valve 106, thereby promoting the inert gas to spread in the installation groove 103 and thus realizing fire extinguishing. At the same time, dry powder 107 is provided in the protective plate 101. When the protective plate 101 is hot-melted, the dry powder 107 is spread in the installation groove 103, which can further improve the fire extinguishing effect.

[0032] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A lithium battery pack with fire extinguishing function, comprising an explosion-proof shell, characterized in that: It also includes a cover plate and a battery assembly, a connecting plate is fixedly connected to the upper end of the explosion-proof shell, the middle part of the connecting plate is hollow and passes through and communicates with the explosion-proof shell, the battery assembly is arranged in the explosion-proof shell, the cover plate is connected to the upper end of the explosion-proof shell, the battery assembly includes a lithium battery body, a positive connecting plate and a negative connecting plate, one end of the several lithium battery bodies is provided with a protrusion, the positive connecting plate is provided with a first groove, the protrusion is plugged and adapted in the first groove, the negative connecting plate is provided with a plurality of connecting grooves, the other end of the lithium battery body is plugged and adapted in the connecting groove, the inner wall of the connecting groove is provided with a protrusion, the other end of the lithium battery body is provided with a second groove, the protrusion is plugged and adapted in the second groove.

2. A lithium battery pack with fire extinguishing function according to claim 1, characterized in that: A plurality of protective plates are fixedly connected in the explosion-proof shell, and mounting grooves are arranged between the protective plates. A plurality of lithium batteries are arranged in groups in each mounting groove. A plurality of lithium battery bodies are sleeved with fixing parts in the vertical direction, and the fixing parts are slidably arranged in the mounting grooves.

3. A lithium battery pack with fire extinguishing function according to claim 2, characterized in that: The positive connecting plate and the negative connecting plate are respectively slidably connected to the two sides of the protective plate in the installation groove, and limit bars are provided at both ends of the protective plate. The positive connecting plate and the negative connecting plate are both provided with a plurality of limit slots, and the limit bars are slidably connected to the limit slots.

4. A lithium battery pack with fire extinguishing function according to claim 3, characterized in that: The protective plate is hollow inside and is provided with dry powder.

5. A lithium battery pack with fire extinguishing function according to claim 1, characterized in that: An air storage shell is fixedly connected to the upper end of the cover plate, and an air storage tank is arranged inside the air storage shell. Inert gas is stored in the air storage tank. An air vent is arranged in the cover plate, and the air vent is connected to the lower end of the air storage tank. The lower end of the air vent is connected to an air transmission channel, and the lower end of the air transmission channel is connected to a plurality of air outlet channels, and the air outlet channels pass through the lower end of the cover plate. A first control valve is arranged on the air vent.

6. A lithium battery pack with fire extinguishing function according to claim 5, characterized in that: A plurality of smoke sensors are fixedly connected to the lower end of the cover plate, and the smoke sensors are arranged at the upper end of each installation groove.

7. A lithium battery pack with fire extinguishing function according to claim 1, characterized in that: A plurality of exhaust channels are arranged in the explosion-proof shell, and the exhaust channels run through both sides of the explosion-proof shell. The upper end of each exhaust channel is connected with a connecting channel, and the connecting channel is connected to the lower end of the installation groove. A second control valve is arranged on the connecting channel.

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