CN218160622U

CN218160622U - Battery box with explosion-proof performance

Info

Publication number: CN218160622U
Application number: CN202220624030.XU
Authority: CN
Inventors: 井鹏; 王宁
Original assignee: Dongguan Guanqin Electronic Technology Co ltd
Current assignee: Dongguan Guanqin Electronic Technology Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-12-27
Anticipated expiration: 2032-03-21

Abstract

The utility model discloses a battery box with explosion-proof performance, the power distribution box comprises a box body, the case lid, the battery module, the liquid nitrogen heat sink, exhaust apparatus, temperature sensor and controller, be equipped with in the box and hold the chamber, the battery module is placed in holding the intracavity, the case lid fits on the box, the box is equipped with the first explosion-proof layer that connects gradually from inside to outside, interior heat insulating layer, the fire prevention intermediate layer, outer heat insulating layer and the explosion-proof layer of second, the liquid nitrogen heat sink is installed in the box outside, and be linked together with holding the chamber, exhaust apparatus installs on box and case lid, and be linked together with holding the chamber, temperature sensor installs in the case lid inboardly, and be located and hold the chamber top, the controller is connected with liquid nitrogen heat sink and temperature sensor looks electricity. The utility model discloses novel structure plays better cooling explosion-proof effect to the battery module, is applicable to and deposits the battery module.

Description

Battery box with explosion-proof performance

Technical Field

The utility model relates to a new energy battery technical field especially relates to a battery box with explosion-proof performance.

Background

Along with energy shortage and environmental protection requirements in the world, an environment-friendly and energy-saving electric automobile becomes the development direction of the automobile industry, a power source of the electric automobile is a battery pack formed by connecting a plurality of lithium batteries in series and parallel, and the battery pack is generally arranged and combined and then placed in a battery box in order to facilitate quick change and quick charging of power batteries of the electric automobile. The temperature of the battery can rise during charging and discharging, certain gas is generated at the same time, the pressure in the battery box is increased rapidly, and the gas in the battery box needs to be discharged to avoid explosion.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery box with explosion-proof ability.

According to the utility model discloses an aspect provides a battery box with explosion-proof performance, the power distribution box comprises a box body, the case lid, the battery module, liquid nitrogen heat sink, exhaust apparatus, temperature sensor and controller, be equipped with in the box and hold the chamber, the battery module is placed in holding the intracavity, the case lid fits on the box, the box is equipped with the first explosion-proof layer that connects gradually from inside to outside, interior insulating layer, the fire prevention intermediate layer, outer insulating layer and second explosion-proof layer, liquid nitrogen heat sink installs in the box outside, and be linked together with holding the chamber, exhaust apparatus installs on box and case lid, and be linked together with holding the chamber, temperature sensor installs in the case lid inboard, and be located and hold the chamber top, the controller is connected with liquid nitrogen heat sink and temperature sensor electricity mutually.

The utility model has the advantages that: the utility model discloses a set up first explosion-proof layer, interior heat insulating layer, the fire prevention intermediate layer, outer heat insulating layer and the explosion-proof layer of second, strengthen the explosion-proof of box, fire prevention and heat-proof quality, set up liquid nitrogen heat sink, be used for cooling down the battery module, avoid the battery module to explode because of the high temperature, set up exhaust apparatus, be used for reducing the atmospheric pressure in the box, protection box and battery module set up temperature sensor and are used for carrying out the temperature measurement to the battery module, the controller is used for receiving temperature sensor's signal, and control liquid nitrogen heat sink. The utility model discloses novel structure plays better cooling explosion-proof effect to the battery module, is applicable to and deposits the battery module.

In some embodiments, the utility model discloses still include the dust sensor, the dust sensor is installed in the case lid inboard to be located temperature sensor one side, the dust sensor is connected with controller looks electricity. The dust sensor is used for monitoring and holding the dust concentration of intracavity, avoids holding the intracavity because of the too high emergence explosion of dust concentration.

In some embodiments, the utility model discloses still include mount and fixed rope, mount detachably clamps in holding the intracavity, the mount with hold and have certain space between the chamber bottom, the mount includes a plurality of dead levers that are parallel to each other, fixed rope twines on battery module, its both ends are tied up with the dead lever of battery module both sides respectively and are connected. The mount is used for placing the battery module, and fixed rope is used for fixing the battery module on the dead lever, avoids the battery to take place to shift and collide in the transportation. Set up the dead lever, the cooling tube spun liquid nitrogen gasification volatilizees under being convenient for, makes volatile nitrogen gas encircle the battery module, increases the contact surface of nitrogen gas and battery module and meets, is convenient for carry out rapid cooling to the battery module.

In some embodiments, the liquid nitrogen cooling device comprises a mounting rack, a liquid nitrogen storage tank, a control valve, an upper cooling pipe and a lower cooling pipe, wherein the mounting rack is mounted on the outer side wall of the box body, the liquid nitrogen storage tank is placed on the mounting rack, one end of the control valve is communicated with the liquid nitrogen storage tank, the other end of the control valve is communicated with the upper cooling pipe and the lower cooling pipe through pipelines respectively, the upper cooling pipe and the lower cooling pipe are parallel up and down, and the upper cooling pipe and the lower cooling pipe are located in the accommodating cavity. The mounting rack is used for supporting and fixing the liquid nitrogen storage tank, and the control valve is used for controlling the opening and closing of the liquid nitrogen storage tank and controlling the discharge of liquid nitrogen in the storage tank. The upper cooling pipe is located above the fixing frame and used for spraying liquid nitrogen to the battery module and cooling the battery module with overhigh temperature. The lower cooling pipe is positioned below the fixing frame and the battery module and used for cooling the bottom of the battery module.

In some embodiments, the upper cooling pipe is located above the fixing frame and surrounds the inner side wall of the accommodating cavity, the lower cooling pipe is located below the fixing frame and is a closed loop, the upper cooling pipe and the lower cooling pipe are both provided with a plurality of spray holes, the intervals among the spray holes are equal, the openings of the spray holes of the upper cooling pipe face the battery module, and the openings of the spray holes of the lower cooling pipe face the bottom of the battery module. The liquid nitrogen blowout in last cooling tube and the cooling tube down is convenient for carry out rapid cooling to battery module to the orifice.

In some embodiments, the bottom of the accommodating cavity is provided with a receiving groove, and the receiving groove is positioned below the battery module. The receiving groove is used for receiving leakage generated by the battery module in high-temperature fault.

In some embodiments, the exhaust device comprises an explosion-proof pressure relief valve and an exhaust pipe, the explosion-proof pressure relief valve is embedded in the box body, one end of the explosion-proof pressure relief valve is communicated with the accommodating cavity, the other end of the explosion-proof pressure relief valve is communicated with the exhaust pipe, and the exhaust pipe extends out of the box body. Explosion-proof pressure relief method opens when holding intracavity atmospheric pressure too high, will hold the gas of intracavity outside the box of discharging through the blast pipe, carries out the pressure release to holding the intracavity, avoids the box because of the too high explosion of atmospheric pressure.

In some embodiments, the exhaust device further comprises a pressure relief hole and a plugging piece, the pressure relief hole penetrates through the box cover, the plugging piece is embedded in the pressure relief hole, the size and the shape of the plugging piece are matched with the pressure relief hole, one end of the plugging piece is communicated with the accommodating cavity, and the surface of the other end of the plugging piece is provided with a cross-shaped opening and is communicated with the outer side of the box body. When holding intracavity atmospheric pressure when too high, only be not enough to reach the step-down purpose through explosion-proof relief valve, the gas that holds the intracavity passes through the pressure release hole, gets into the shutoff piece, backs down the cross opening of shutoff piece surface, rushes out outside the box, carries out the pressure release to holding the chamber. After the pressure in the accommodating cavity is reduced, the gas in the accommodating cavity is not enough to burst the cross-shaped opening, the cross-shaped opening is closed, and the pressure relief hole is blocked.

In some embodiments, the first explosion-proof layer and the second explosion-proof layer are both stainless steel plate explosion-proof layers, the thickness of each of the first explosion-proof layer and the second explosion-proof layer is 4mm-5mm, the fireproof interlayer is a ceramic fiber layer, and the thickness of the fireproof interlayer is 0.5cm-1cm. The stainless steel plate explosion-proof layer has a good explosion-proof effect. The ceramic fiber layer has a good fireproof effect.

In some embodiments, the inner thermal insulation layer is an aerogel thermal insulation layer having a thickness of 0.5cm to 1.5cm, the outer thermal insulation layer is a fiberglass layer, and the outer thermal insulation layer has a thickness of 0.5cm to 0.8cm. The aerogel insulating layer has better thermal-insulated effect, and the glass fiber layer has better thermal-insulated heat preservation effect.

Drawings

Fig. 1 is a schematic structural diagram of a battery box with explosion-proof performance according to an embodiment of the present invention when the box cover is opened.

Fig. 2 is a top view of a battery box with explosion-proof performance according to an embodiment of the present invention.

Fig. 3 is a top view of the box body, the fixing frame and the liquid nitrogen cooling device of the battery box with explosion-proof performance according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a box body of a battery box with explosion-proof performance according to an embodiment of the present invention.

Fig. 5 is a block diagram of a battery box with explosion-proof performance according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples.

Referring to fig. 1 to 5, the utility model provides a battery box with explosion-proof performance, including box 1, case lid 2, battery module 3, liquid nitrogen heat sink 4, exhaust apparatus 5, temperature sensor 6, controller 7, dust sensor 8, mount 9 and fixed rope 10.

On case lid 2 lid fitted box 1, case lid 2 passed through hinge connection or was connected through the hasp with box 1, and the 1 outside of box is equipped with fixed lock body part, and 2 corresponding movable hasp parts that are equipped with in the outside of case lid. The temperature sensor 6 and the dust sensor 8 are both mounted inside the case cover 2 and above the accommodating chamber 16. The dust sensor 8 is located on the side of the temperature sensor 6. The dust sensor 8 is used for monitoring the dust concentration in the box body 1 and avoiding external combustible dust or conductive dust from entering the box body 1.

The box body 1 is provided with a first explosion-proof layer 11, an inner heat insulation layer 12, a fireproof interlayer 13, an outer heat insulation layer 14 and a second explosion-proof layer 15 which are connected in sequence from inside to outside. The box body 1 is internally provided with a containing cavity 16, and the bottom of the containing cavity 16 is provided with a receiving groove 161. The fixing frame 9 is detachably clamped in the accommodating cavity 16, and a certain space is formed between the fixing frame 9 and the bottom of the accommodating cavity 16. The fixing frame 9 is located between the upper cooling pipe 44 and the lower cooling pipe 45. The fixing frame 9 includes a plurality of fixing rods 91 parallel to each other, and a gap is provided between two adjacent fixing rods 91. The battery module 3 is placed on the fixing frame 9, and the receiving groove 161 is located below the battery module 3. The fixing rope 10 is wound around the battery module 3, and both ends of the fixing rope are respectively tied up and connected with the fixing rods 91 below the battery module 3.

The first explosion-proof layer 11 and the second explosion-proof layer 15 are stainless steel plate explosion-proof layers, and the thicknesses of the first explosion-proof layer 11 and the second explosion-proof layer 15 are both 4mm-5mm. The fireproof interlayer 13 is a ceramic fiber layer, and the thickness of the fireproof interlayer 13 is 0.5cm-1cm.

The inner heat insulation layer 12 is an aerogel heat insulation layer, the thickness of the inner heat insulation layer 12 is 0.5cm-1.5cm, the outer heat insulation layer 14 is a glass fiber layer, and the thickness of the outer heat insulation layer 14 is 0.5cm-0.8cm.

The liquid nitrogen cooling device 4 comprises a mounting frame 41, a liquid nitrogen storage tank 42, a control valve 43, an upper cooling pipe 44 and a lower cooling pipe 45. The mounting bracket 41 is mounted on the outer side wall of the box body 1, the liquid nitrogen storage tank 42 is placed on the mounting bracket 41, one end of the control valve 43 is communicated with the liquid nitrogen storage tank 42, and the other end of the control valve is respectively communicated with the upper cooling pipe 44 and the lower cooling pipe 45 through pipelines. The upper cooling pipe 44 and the lower cooling pipe 45 are parallel up and down and are located in the accommodating chamber 16. The control valve 43 is a solenoid valve.

The upper cooling pipe 44 is located above the fixing frame 9 and surrounds the inner side wall of the accommodating chamber 16. The lower cooling pipe 45 is located below the fixing frame 8 and is a closed loop. The surrounding area of the lower cooling tube 45 is smaller than that of the upper cooling tube 44. The upper cooling pipe 44 and the lower cooling pipe 45 are each provided with a plurality of spray holes 46, and the intervals between the plurality of spray holes 46 are equal. The spray holes 46 of the upper cooling pipe 44 are opened at the side of the upper cooling pipe 44 and face the battery module 3. The openings of the spray holes of the lower cooling pipe 45 are directed upward and toward the bottom of the battery module 3.

The exhaust apparatus 5 includes an explosion-proof relief valve 51, an exhaust pipe 52, a relief hole, and a blocking piece 54. The explosion-proof relief valve 51 is embedded in the box body 1, one end of the explosion-proof relief valve is communicated with the accommodating cavity 16, the other end of the explosion-proof relief valve is communicated with the exhaust pipe 52, and the exhaust pipe 52 extends out of the box body 1. The number of the explosion-proof relief valves 51 is plural, the number of the exhaust pipes 52 is plural, and the plurality of the explosion-proof relief valves 51 and the plurality of the exhaust pipes 52 are communicated in one-to-one correspondence. The pressure relief hole penetrates the case cover 2, and the closing member 54 is fitted in the pressure relief hole. The closure 54 is sized and shaped to fit the pressure relief hole. One end of the blocking piece 54 is communicated with the accommodating cavity 16, and the surface of the other end is provided with a cross-shaped opening and is communicated with the outer side of the box body 1. The pressure release hole is a plurality of, and shutoff piece 54 is a plurality of, a plurality of pressure release hole evenly distributed in case lid 2 upper surface, and a plurality of shutoff pieces 54 match with a plurality of pressure release hole one-to-one correspondence.

The controller 7 is installed on the box cover 2, and the controller 7 is respectively connected with the control valve 43, the temperature sensor 6 and the dust sensor 8 in a signal mode.

The utility model discloses when practical, place battery module 3 on mount 9, use fixed rope 10 to fix battery module 3 on dead lever 91, fixed rope 10 is tied up with dead lever 91 mutually and is connected. The box cover 2 is covered on the box body 1. During transportation, the temperature sensor 6 monitors the temperature in the accommodating chamber 16 and sends temperature data to the controller 7. When the temperature is too high, the controller 7 starts the control valve 43, and the liquid nitrogen in the liquid nitrogen storage tank 42 flows into the upper cooling pipe 44 and the lower cooling pipe 45 and is sprayed to the battery module 3 through the spray holes 46, so that the battery module 3 is cooled, and the explosion of the battery module 3 is avoided. Meanwhile, the liquid nitrogen is converted into nitrogen, is an inert gas, reduces the oxygen content in the accommodating cavity 16, and can also prevent the battery module 3 from being ignited and burnt. Liquid nitrogen gasification increase holds the atmospheric pressure in the chamber 16, and when atmospheric pressure was too high, explosion-proof relief valve 51 and shutoff piece 54 will hold the gaseous exhaust through blast pipe 52 and cross opening in the chamber 16, and the reduction holds the atmospheric pressure in the chamber 16, avoids exploding. The dust sensor 8 monitors the dust concentration in the accommodating cavity 16 and transmits data to the controller 7, so that explosion caused by combustible dust or conductive dust entering the accommodating cavity 16 is avoided. When the dust concentration is too high, the controller 7 starts the control valve 43, and the liquid nitrogen in the liquid nitrogen storage tank 42 flows into the upper cooling pipe 44 and the lower cooling pipe 45 and is sprayed into the battery module 3 and the accommodating cavity 16 through the spray holes 46 to cool the battery module 3, so that the dust explosion caused by the temperature rise of the battery module 3 is avoided. Meanwhile, the liquid nitrogen is converted into nitrogen, the air pressure in the accommodating cavity 16 is increased, and when the nitrogen is discharged out of the box body 1 through the explosion-proof pressure release valve 51 and the blocking piece 54, dust in the accommodating cavity 16 is discharged simultaneously, and the dust concentration in the accommodating cavity 16 is reduced.

The above description is only some embodiments of the present invention, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the inventive concept, and these modifications and improvements all belong to the protection scope of the present invention.

Claims

1. The utility model provides a battery box with explosion-proof performance, a serial communication port, including box, case lid, battery module, liquid nitrogen heat sink, exhaust apparatus, temperature sensor and controller, be equipped with in the box and hold the chamber, the battery module place in hold the intracavity, the case lid fits on the box, the box is equipped with first explosion-proof layer, interior insulating layer, fire prevention intermediate layer, outer insulating layer and the second explosion-proof layer that connect gradually from inside to outside, the liquid nitrogen heat sink install in the box outside, and with it is linked together to hold the chamber, the exhaust apparatus is located on box and the case lid, and with it is linked together to hold the chamber, temperature sensor install in the case lid is inboard, and be located hold the chamber top, the controller with liquid nitrogen heat sink and temperature sensor electricity are connected mutually.

2. The battery box with the explosion-proof performance as claimed in claim 1, further comprising a dust sensor, wherein the dust sensor is installed inside the box cover and located at one side of the temperature sensor, and the dust sensor is electrically connected with the controller.

3. The battery box with explosion-proof performance as claimed in claim 1, further comprising a fixing frame and a fixing rope, wherein the fixing frame is detachably clamped in the accommodating cavity, a space is formed between the fixing frame and the bottom of the accommodating cavity, the fixing frame comprises a plurality of fixing rods which are parallel to each other, the fixing rope is wound on the battery module, and two ends of the fixing rope are respectively connected with the fixing rods on two sides of the battery module in a bundling manner.

4. The battery box with the explosion-proof performance according to claim 3, characterized in that the liquid nitrogen cooling device comprises a mounting frame, a liquid nitrogen storage tank, a control valve, an upper cooling pipe and a lower cooling pipe, the mounting frame is mounted on the outer side wall of the box body, the liquid nitrogen storage tank is placed on the mounting frame, one end of the control valve is communicated with the liquid nitrogen storage tank, the other end of the control valve is respectively communicated with the upper cooling pipe and the lower cooling pipe through pipelines, and the upper cooling pipe and the lower cooling pipe are parallel up and down and are both located in the containing cavity.

5. The battery box according to claim 4, wherein the upper cooling pipe is located above the fixing frame and surrounds the inner side wall of the accommodating cavity, the lower cooling pipe is located below the fixing frame and is a closed loop, the upper cooling pipe and the lower cooling pipe are provided with a plurality of spray holes, the spray holes are spaced at equal intervals, the spray holes of the upper cooling pipe open towards the battery module, and the spray holes of the lower cooling pipe open towards the bottom of the battery module.

6. The battery box with explosion-proof performance of claim 1, wherein the bottom of the accommodating cavity is provided with a receiving groove, and the receiving groove is positioned below the battery module.

7. The battery box with the explosion-proof performance according to claim 1, characterized in that the exhaust device comprises an explosion-proof relief valve and an exhaust pipe, the explosion-proof relief valve is embedded in the box body, one end of the explosion-proof relief valve is communicated with the containing cavity, the other end of the explosion-proof relief valve is communicated with the exhaust pipe, and the exhaust pipe extends out of the box body.

8. The battery box with explosion-proof performance according to claim 7, characterized in that the exhaust device further comprises a pressure relief hole and a blocking piece, the pressure relief hole penetrates through the box cover, the blocking piece is embedded in the pressure relief hole, the size and the shape of the blocking piece are matched with the pressure relief hole, one end of the blocking piece is communicated with the accommodating cavity, and the surface of the other end of the blocking piece is provided with a cross-shaped opening and is communicated with the outer side of the box body.

9. The battery box with explosion-proof performance of claim 1, wherein the first explosion-proof layer is a stainless steel plate explosion-proof layer, the thickness of the first explosion-proof layer is 4mm-5mm, the fireproof interlayer is a ceramic fiber layer, and the thickness of the fireproof interlayer is 3mm-5mm.

10. The battery box with explosion-proof performance of claim 1, wherein the inner thermal insulation layer is an aerogel thermal insulation layer, the thickness of the inner thermal insulation layer is 2.5cm-4cm, the thickness of the outer thermal insulation layer is a glass fiber layer, and the thickness of the outer thermal insulation layer is 0.5cm-0.8cm.