Safety protection device for modularized green battery pack

Abstract

The invention relates to the technical field of battery packs, and particularly discloses a safety protection device for a modular green battery pack, the safety protection device comprises a shell, a plurality of mounting boxes and a plurality of battery packs, the shell comprises a shell and a shell cover, the shell cover is connected to the top surface of the shell, each battery pack is mounted in one mounting box, and the shell cover is connected to the top surface of the shell. The mounting boxes are connected to the inner bottom face of the shell, the multiple mounting boxes are divided into two groups and located on the two sides of the shell, and a first heat dissipation channel is arranged between the two groups of mounting boxes; the mounting box comprises a box body and a box cover, the box body is connected to the bottom surface of the shell, a pressing plate is connected around the bottom surface of the box cover, and the pressing plate is pressed on the top surface of a side plate of the box body; the battery pack is mounted in the box body, a through hole communicated with the first heat dissipation channel is formed in a side plate, close to the other group of mounting boxes, of the box body, and a sealing plug is inserted into the through hole; the two ends of the shell are provided with an air inlet and an air outlet which communicate with the first heat dissipation channel correspondingly. The method has the effect of improving the life safety of people in the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a safety protection device for a modular green battery pack. Background Art

[0002] The function of a battery is to convert the chemical energy in active substances into electrical energy through electrochemical reactions. With the development of new energy technologies, more and more vehicles are equipped with new energy battery packs to replace traditional fuel vehicles. The batteries installed in new energy vehicles are often lithium batteries. Due to the high activity of lithium batteries, violent chemical reactions are likely to occur in collisions, resulting in fires.

[0003] In the prior art, the battery pack is often installed in the chassis of the vehicle, and some steel structures of the chassis protect the battery pack, and the chassis is connected to the vehicle body; when the vehicle is driving, especially when there are protrusions or even sharp protrusions on the ground, the vehicle chassis will collide with the protrusions, and the vehicle chassis will be deformed by the collision, and the deformed part will squeeze the battery pack. The battery pack will be deformed due to the collision, and the lithium battery will catch fire due to the violent reaction due to the collision. The catching battery pack will spread to the other battery packs, making the fire bigger and bigger, and even spreading to the entire vehicle, which poses a life threat to the people in the vehicle. Summary of the invention

[0004] In order to improve the safety of the lives of people in the vehicle, the present application provides a safety protection device for a modular green battery pack.

[0005] The present application provides a modular green battery pack safety protection device that adopts the following technical solution: A safety protection device for a modular green battery pack comprises an outer shell, an installation box and a battery pack, wherein the outer shell comprises a shell and a shell cover, the bottom surface of a side plate around the shell cover is connected to the top surface of a side plate around the shell, the installation box and the battery pack are both provided with a plurality, each of the battery packs is installed in one of the installation boxes, the installation box is connected to the inner bottom surface of the shell, and the plurality of installation boxes are divided into two groups, wherein one group of the installation boxes is located on one side of the shell, and the other group of the installation boxes is located on the other side of the shell, and a first heat dissipation channel is provided between the two groups of the installation boxes; the installation box comprises a box body and a box cover, the bottom surface of the box body is connected to the bottom surface of the shell, a pressing plate is connected around the bottom surface of the box cover, and the pressing plate is pressed against the top surface of the side plate of the box body; the battery pack is installed in the box body, and a through hole communicating with the first heat dissipation channel is provided on the side plate of the box body close to the other group of the installation boxes, and a sealing plug is inserted in the through hole; an air inlet and an air outlet communicating with the first heat dissipation channel are respectively provided at both ends of the shell.

[0006] Optionally, a second heat dissipation channel is provided between each group of adjacent installation boxes, and a third heat dissipation channel is provided between each group of installation boxes and the inner wall of the shell.

[0007] Optionally, a socket is provided on the side panel of the box body away from the through hole, and a plug block is inserted into the socket from the inside of the box body, and two first conductive columns are connected to the top surface of the end of the plug block located inside the box body, and a mounting block is installed on the side of the battery pack close to the socket, and two first conductive rings are provided on the bottom surface of the mounting block, and the two first conductive rings are respectively connected to the positive and negative poles of the battery pack, and the first conductive column is inserted into the first conductive ring, and the two first conductive columns are used to connect to an external circuit.

[0008] Optionally, two second conductive rings are provided on the top surface of the end of the plug block outside the box body, and the two second conductive rings are respectively connected to the two first conductive pillars through wires; a moving block is provided outside the box body, and two second conductive pillars are provided on the bottom surface of one end of the moving block, and the two second conductive pillars are respectively inserted into the two second conductive rings; two third conductive rings are passed through the end of the moving block away from the second conductive pillars, and the two third conductive rings are respectively connected to the two second conductive pillars through wires; a first fixed block and a second fixed block are connected to the inner wall of the shell, and two third conductive pillars are connected below the first fixed block, and the two third conductive pillars are connected by wires; two fourth conductive pillars are connected to the top surface of the second fixed block, and the fourth conductive pillars are inserted into the two third conductive rings and pass through the top of the third conductive ring, and the adjacent fourth conductive pillars between adjacent second fixed blocks are connected by lines; a driving mechanism for driving the moving block to rise and fall is provided in the shell.

[0009] Optionally, the driving mechanism includes a vertical plate, a horizontal plate, a guide rod and a driving assembly, wherein two vertical plates are provided, the bottom end of each vertical plate is connected to the top surface of the movable block, the vertical plate is located between the first fixed block and the outer wall of the box body, and the horizontal plate is connected to the top end of the two vertical plates; the driving assembly is installed on the inner wall of the shell, and the driving assembly is used to drive the horizontal plate to rise and fall.

[0010] Optionally, the driving assembly includes a support frame, a motor, a worm, a worm wheel and a screw; the bottom end of the support frame is connected to the inner wall of the shell, the motor is installed on the top of the support frame, the top surface of the motor is connected to a support plate, the top end of the screw is rotatably connected to the end of the support plate, the bottom end of the screw passes through the bottom surface of the cross plate and is threadedly transmitted with the cross plate; the end of the worm is connected to the output shaft of the motor, the worm wheel is coaxially connected to the top of the screw, and the worm wheel is meshed with the worm.

[0011] Optionally, a plurality of first partitions are connected to the bottom surface of the box cover, and two ends of the first partitions are connected to the inner side surface of the clamping plate; two rotating plates are arranged between two adjacent first partitions, and rotating rods are connected to the inside of the sides of the two rotating plates that are away from each other, and the two ends of the rotating rods extend out of the rotating plates, and the rotating rods are rotatably connected to the inside of the clamping plate, and a detachable fire extinguishing agent bag is arranged between adjacent first partitions; the detachable fire extinguishing agent bag is located above the rotating plate, and the bag opening of the detachable fire extinguishing agent bag passes through between the two rotating plates and is respectively adhered to the bottom surfaces of the two rotating plates, and the inner wall of the detachable fire extinguishing agent bag opening located between the two rotating plates is adhered to each other; the outer wall of the detachable fire extinguishing agent bag is adhered to the first partition and the side wall of the box cover; a limiting mechanism for limiting the rotation of the rotating plate is installed on the clamping plate.

[0012] Optionally, the limiting mechanism includes a plug plate, a push-pull plate and a wedge block, wherein a plurality of plug plates are provided, each of the plug plates corresponds to a detachable fire extinguishing agent bag, the plug plate is plugged into the clamping plate close to one side of the driving mechanism, the end of the plug plate is located on the bottom surface of one end of the rotating plate, the other end of the plug plate passes through the outside of the clamping plate, the push-pull plate is provided on the outside of the clamping plate, and the side of the push-pull plate is connected to the end of the plug plate; two wedge blocks are provided, and the two wedge blocks are respectively connected to the sides of the two vertical plates away from each other, the tip of the wedge block faces upward, and a groove is provided on the side of the push-pull plate away from the clamping plate, the groove is for the two wedge blocks to pass through, and two symmetrical side walls of the groove are connected to a block, the wedge block is located on the side of the block close to the clamping plate, and the side of the wedge block faces the block.

[0013] Optionally, two magnets are embedded on the side of the pressing plate close to the push-pull plate, and the two magnets are used to adsorb the push-pull plate.

[0014] Optionally, a second partition is connected to the bottom surface of the box body, the top surface of the second partition is attached to the bottom surface of the battery pack, and non-removable fire extinguishing agent bags are arranged between adjacent second partitions and between the second partition and the side panels of the box body; a plurality of third partitions are connected to the inner wall of the side panels of the box body, the third partitions are arranged around the box body, the third partitions are attached to the sides of the battery pack, and the non-removable fire extinguishing agent bags are also arranged between adjacent third partitions.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the vehicle is driving, wind enters the first heat dissipation channel from the air inlet and then is discharged from the air outlet; when the heat generated by the battery pack is working, the heat is transferred to the first heat dissipation channel, the second heat dissipation channel and the third heat dissipation channel through the installation box. Since there is airflow in the first heat dissipation channel, the heat gathered in the second heat dissipation channel and the third heat dissipation channel will flow to the first heat dissipation channel, so as to dissipate the heat in the shell; when one of the battery packs collides and catches fire, since each battery pack is wrapped by the installation box, the fire will not spread out of the installation box, and since each installation box is not close to each other, the fire will not spread to the remaining battery packs; in order to prevent the installation box from burning violently and causing the internal pressure of the installation box to be too high, a sealing plug is set. When the pressure is too high, the sealing plug will be pushed open by the pressure; when the pressure is not enough to push the sealing plug, the sealing plug cooperates with the installation box to isolate the battery pack from the outside world to prevent air from entering, which helps to suppress the fire, thereby preventing the entire vehicle from being ignited, and giving the passengers enough time to evacuate, thereby improving the safety of the passengers; 2. When installing the battery pack, first insert the plug block into the socket and fix it, then lower the battery pack into the box body, align and plug the first conductive column and the first conductive ring, and then complete the electrical connection between the battery pack and the external circuit; when the battery pack is short-circuited or on fire, and the temperature detected by the temperature sensor is too high, the driving mechanism is controlled to drive the moving block to rise, so that the second conductive column is separated from the second conductive ring, the third conductive column is inserted into the third conductive ring, and part of the fourth conductive column is still in the third conductive ring, so as to cut off the circuit in the battery pack; the normal connection of the remaining battery packs is achieved through the third conductive column, the third conductive ring and the fourth conductive column, so that the whole vehicle does not stop; 3. When a fire occurs in the battery pack, the restriction on the rotating plate between the adjacent first partitions by the restriction mechanism is released. Under the action of their own gravity, the two rotating plates rotate downward, and the rotation of the rotating plates drives the bag opening of the detachable fire extinguishing agent bag to open. At the same time, the fire extinguishing agent in the detachable fire extinguishing agent bag is sprinkled on the top surface of the battery pack to extinguish the fire at the fire site of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the protective device of the embodiment of the present application; Figure 2 It is a schematic diagram of the explosion structure of the protective device of the embodiment of the present application; Figure 3 It is a schematic diagram of the exploded structure of the installation box of the embodiment of the present application; Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of part A; Figure 5 is a schematic diagram of the structure of the driving mechanism of an embodiment of the present application; Figure 6is a schematic diagram of a partial cross-sectional structure of an installation box according to an embodiment of the present application; Figure 7 yes Figure 6 A schematic diagram of the enlarged structure of part B; Figure 8 yes Figure 6 Schematic diagram of the enlarged structure of part C.

[0017] Description of reference numerals: 1. Shell; 11. Shell; 111. Air inlet; 112. Air outlet; 113. First fixed block; 1131. Third conductive column; 114. Second fixed block; 1141. Fourth conductive column; 12. Shell cover; 13. First heat dissipation channel; 14. Second heat dissipation channel; 15. Third heat dissipation channel; 16. Circuit; 2. Mounting box; 21. Box body; 211. Through hole; 212. Sealing plug; 213. Socket; 214. Insert block; 2141. First conductive column; 2142. Second conductive ring; 215. Moving block; 2151. Second conductive column; 2152. Third conductive ring; 216. Second partition; 217. The third partition; 218, sealing ring; 22, box cover; 221, pressing plate; 2211, magnet; 222, first partition; 3, battery pack; 31, mounting block; 311, first conductive ring; 4, driving mechanism; 41, vertical plate; 42, horizontal plate; 43, guide rod; 44, driving assembly; 441, support frame; 442, motor; 4421, support plate; 443, worm; 444, worm gear; 445, screw; 5, rotating plate; 51, rotating rod; 6, detachable fire extinguishing agent bag; 7, limiting mechanism; 71, plug plate; 72, push-pull plate; 721, groove; 722, block; 73, wedge block; 8, non-detachable fire extinguishing agent bag. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-8 This application is described in further detail.

[0019] The present application embodiment discloses a safety protection device for a modular green battery pack. Figure 1-8The protective device includes a shell 1, a mounting box 2 and a battery pack 3. The shell 1 includes a shell 11 and a shell cover 12. The shell 11 is installed in the vehicle chassis. The shell cover 12 is arranged above the shell 11. The side panels of the shell cover 12 are detachably connected to the top surface of the side panels of the shell 11. There are multiple mounting boxes 2 and battery packs 3. Each battery pack 3 is installed in a mounting box 2. The mounting box 2 is connected to the inner bottom surface of the shell 11 by bolts. The multiple mounting boxes 2 are divided into two groups, one of which is located on one side of the shell 11, and the other is located on the other side of the shell 11. A first heat dissipation channel 13 is arranged between the two groups of mounting boxes 2, and a second heat dissipation channel 14 is arranged between each group of adjacent mounting boxes 2. Each group of mounting boxes 2 and the shell 11 have a heat dissipation channel 14. A third heat dissipation channel 15 is arranged between the walls; the installation box 2 includes a box body 21 and a box cover 22, the bottom surface of the box body 21 is connected to the bottom surface of the shell 11, the box cover 22 is arranged above the box body 21, and a clamping plate 221 is connected around the bottom surface of the box cover 22, the clamping plate 221 is pressed against the top surface of the side plate of the box body 21, and the box cover 22 is connected to the top surface of the box body 21 by bolts; the battery pack 3 is installed in the box body 21, and the side plate of the box body 21 close to another group of installation boxes 2 is provided with a through hole 211 connected to the first heat dissipation channel 13, and a sealing plug 212 is inserted into the through hole 211; the two ends of the shell 11 are respectively provided with an air inlet 111 and an air outlet 112 connected to the first heat dissipation channel 13; the installation box 2, the shell 11 and the sealing plug 212 are all made of steel.

[0020] When the vehicle is driving, wind enters the first heat dissipation channel 13 from the air inlet 111 and then is discharged from the air outlet 112; when the battery pack 3 generates heat at work, the heat is transferred to the first heat dissipation channel 13, the second heat dissipation channel 14 and the third heat dissipation channel 15 through the installation box 2. Since there is airflow in the first heat dissipation channel 13, the heat collected in the second heat dissipation channel 14 and the third heat dissipation channel 15 will flow to the first heat dissipation channel 13, so as to dissipate heat in the shell 11; when one of the battery packs 3 collides and catches fire, since each battery pack 3 is wrapped by the installation box 2, The fire will not spread out of the installation box 2, and each installation box 2 is not close to each other, and the fire will not spread to the remaining battery packs 3; in order to prevent violent combustion inside the installation box 2, causing excessive pressure inside the installation box 2, a sealing plug 212 is provided. When the pressure is too high, the sealing plug 212 will be pushed open by the pressure; when the pressure is not enough to push the sealing plug 212, the sealing plug 212 cooperates with the installation box 2 to isolate the battery pack 3 from the outside world to prevent air from entering, which helps to suppress the fire, thereby preventing the entire vehicle from being ignited, and giving passengers enough time to evacuate, thereby improving the safety of the passengers.

[0021] The side plate of the box body 21 away from the through hole 211 is provided with a socket 213, and the socket 213 is plugged with an insert block 214 from the inside of the box body 21. The top surface of the end of the insert block 214 located in the box body 21 is connected with two first conductive pillars 2141. A mounting block 31 is installed on the side of the battery pack 3 close to the socket 213. The bottom surface of the mounting block 31 is provided with two first conductive rings 311. The two first conductive rings 311 are respectively connected to the positive and negative electrodes of the battery pack 3. The first conductive pillar 2141 is plugged into the first conductive ring 311; the insert block 214 is located in the box body Two second conductive rings 2142 are arranged on the top surface of the end outside the box body 21, and the two second conductive rings 2142 are respectively connected to the two first conductive pillars 2141 through wires; a moving block 215 is arranged outside the box body 21, and two second conductive pillars 2151 are arranged on the bottom surface of one end of the moving block 215, and the two second conductive pillars 2151 are respectively inserted into the two second conductive rings 2142; two third conductive rings 2152 are penetrated at the end of the moving block 215 away from the second conductive pillars 2151, and the two third conductive rings 2152 are respectively connected to the two first conductive pillars 2141 through wires. The first fixing block 113 is connected to the inner wall of the housing 11 and the second fixing block 114 is connected to the inner wall of the housing 11. Each first fixing block 113 and the second fixing block 114 corresponds to an installation box 2. The first fixing block 113 is located above the moving block 215, and the second fixing block 114 is located below the moving block 215. Two third conductive pillars 1131 are connected below the first fixing block 113. The two third conductive pillars 1131 are connected by wires. The two third conductive pillars 1131 are connected to the two third conductive rings 21 52 is aligned; two fourth conductive columns 1141 are connected to the top surface of the second fixed block 114, the fourth conductive columns 1141 are inserted into the two third conductive rings 2152 and pass through the top of the third conductive ring 2152, and the adjacent fourth conductive columns 1141 between adjacent second fixed blocks 114 are connected by a line 16, and the two ends of the line 16 are connected to the load; a driving mechanism 4 for driving the moving block 215 to rise and fall is arranged in the housing 1, each moving block 215 corresponds to a driving mechanism 4, and a temperature sensor is arranged in each installation box 2.

[0022] When installing the battery pack 3, first insert the plug block 214 into the socket 213 and fix it, then lower the battery pack 3 into the box body 21, align and plug the first conductive column 2141 and the first conductive ring 311, and then complete the electrical connection between the battery pack 3 and the external circuit 16; when the battery pack 3 is short-circuited or catches fire, and the temperature detected by the temperature sensor is too high, the driving mechanism 4 is controlled to drive the moving block 215 to rise, so that the second conductive column 2151 is separated from the second conductive ring 2142, the third conductive column 1131 is inserted into the third conductive ring 2152, and part of the fourth conductive column 1141 is still in the third conductive ring 2152, so as to cut off the circuit in the battery pack 3; the normal connection of the remaining battery packs 3 is achieved through the third conductive column 1131, the third conductive ring 2152 and the fourth conductive column 1141, so that the whole vehicle does not stop.

[0023] The driving mechanism 4 includes a vertical plate 41, a horizontal plate 42, a guide rod 43 and a driving assembly 44. Two vertical plates 41 are provided. The bottom end of the vertical plate 41 is connected to the top surface of the moving block 215. The vertical plate 41 is located between the first fixed block 113 and the outer wall of the box body 21. The horizontal plate 42 is connected to the top of the two vertical plates 41; two guide rods 43 are provided, and the two ends of the two guide rods 43 are respectively connected to the bottom surface of the first fixed block 113 and the top surface of the second fixed block 114, and the two guide rods 43 pass through the moving block 215; the driving assembly 44 includes a support frame 441, a motor 442, worm 443, worm wheel 444 and screw 445; the bottom end of the support frame 441 is connected to the inner wall of the shell 11, the motor 442 is installed on the top of the support frame 441, the top surface of the motor 442 is connected to the support plate 4421, the top end of the screw 445 is rotatably connected to the end of the support plate 4421, the bottom end of the screw 445 passes through the bottom surface of the cross plate 42 and is threadedly transmitted with the cross plate 42; the end of the worm 443 is connected to the output shaft of the motor 442, the worm wheel 444 is coaxially connected to the top of the screw 445, and the worm wheel 444 is meshed with the worm 443.

[0024] When it is necessary to drive the moving block 215 to rise and fall, the motor 442 drives the worm 443 to rotate, the worm 443 drives the worm wheel 444 to rotate, the worm wheel 444 drives the screw 445 to rotate, the screw 445 drives the cross plate 42 to rise and fall, the cross plate 42 drives the moving block 215 to rise and fall through the vertical plate 41, and the moving block 215 slides through the guide rod 43.

[0025] The bottom surface of the box cover 22 is connected to a plurality of first partitions 222, which are arranged along the direction of the socket 213, and the two ends of the first partition 222 are connected to the inner side surface of the clamping plate 221; two rotating plates 5 are arranged between two adjacent first partitions 222, and the two rotating plates 5 are in the same plane. The sides of the two rotating plates 5 that are away from each other are connected to the inside of the rotating rods 51, and the two ends of the rotating rods 51 extend out of the rotating plates 5, and the rotating rods 51 are rotatably connected to the clamping plate 221, and the bottom surface of the rotating plate 5 is flush with the bottom surface of the first partition 222, and the adjacent first partitions 222 are A detachable fire extinguishing agent bag 6 is arranged between the plates 222, and the detachable fire extinguishing agent bag 6 contains a fire extinguishing agent, which can be selected from ammonium dihydrogen phosphate, ammonium hydrochloride, high-efficiency dry powder fire extinguishing agent, etc.; the detachable fire extinguishing agent bag 6 is located above the rotating plate 5, and the bag mouth of the detachable fire extinguishing agent bag 6 passes through between the two rotating plates 5 and is respectively adhered to the bottom surfaces of the two rotating plates 5, and the inner walls of the mouth of the detachable fire extinguishing agent bag 6 located between the two rotating plates 5 are adhered to each other; the outer wall of the detachable fire extinguishing agent bag 6 is adhered to the first partition plate 222 and the side wall of the box cover 22; a limiting mechanism 7 for limiting the rotation of the rotating plate 5 is installed on the clamping plate 221.

[0026] When a fire occurs in the battery pack 3, the restriction of the limiting mechanism 7 on the rotating plate 5 between the adjacent first partitions 222 is released. Under the action of their own gravity, the two rotating plates 5 rotate downward, and the rotation of the rotating plates 5 drives the bag opening of the detachable fire extinguishing agent bag 6 to open. At the same time, the fire extinguishing agent in the detachable fire extinguishing agent bag 6 is sprinkled on the top surface of the battery pack 3 to extinguish the fire at the fire site of the battery pack 3.

[0027] The limiting mechanism 7 includes a plug plate 71, a push-pull plate 72 and a wedge block 73. A plurality of plug plates 71 are provided, each plug plate 71 corresponds to a detachable fire extinguishing agent bag 6. The plug plate 71 is plugged into the clamping plate 221 near the side of the driving mechanism 4. The end of the plug plate 71 is located on the bottom surface of one end of the rotating plate 5. The other end of the plug plate 71 passes through the outside of the clamping plate 221. The push-pull plate 72 is provided on the outside of the clamping plate 221. The side of the push-pull plate 72 is connected to the end of the plug plate 71. Two wedge blocks 73 are provided, and the two wedge blocks 73 are respectively connected to the sides of the two vertical plates 41 away from each other, and the tip of the wedge block 73 faces upward. A groove 721 is provided on the side of the push-pull plate 72 away from the clamping plate 221, and the groove 721 is for the two wedge blocks 73 to pass through. The two symmetrical side walls of the groove 721 are connected with a stop block 722. The wedge block 73 is located on the side of the stop block 722 close to the clamping plate 221, and the side of the wedge block 73 faces the stop block 722.

[0028] When it is necessary to release the restriction of the limiting mechanism 7 on the rotating plate 5, the rise of the vertical plate 41 is divided into two stages. If a short circuit occurs, the vertical plate 41 first performs the first stage of rise to separate the second conductive column 2151 and the second guide ring. At this time, the side of the wedge block 73 contacts the stopper 722; if a fire occurs, the vertical plate 41 performs the second stage of rise, that is, the vertical plate 41 continues to drive the wedge block 73 to rise, and the wedge block 73 pushes the stopper 722 away from the side of the clamping plate 221 through the side, and the stopper 722 drives the push-pull plate 72, and the push-pull plate 72 drives the plug plate 71 to move, so that the plug plate 71 gradually moves away from the bottom surface of the rotating plate 5, and the restriction of the plug plate 71 on the rotating plate 5 can be released.

[0029] Two magnets 2211 are embedded on the side of the pressing plate 221 close to the push-pull plate 72 . The two magnets 2211 are used to adsorb the push-pull plate 72 .

[0030] When the detachable fire extinguishing agent bag 6 needs to be installed, the box cover 22 is flipped 180°, and then the rotating plate 5 is rotated to open the rotating plate 5, glue is applied to the side walls of the box cover 22 and the first partition 222, and then the unused detachable fire extinguishing agent bag 6 is placed between two adjacent first partitions 222 and glued, and then the bag mouth of the detachable fire extinguishing agent bag 6 is lifted, the rotating plate 5 is returned to its original position, and the bag mouth of the detachable fire extinguishing agent bag 6 is glued to the rotating plate 5, and the push-pull plate 72 is pushed to make the magnet 2211 adsorb the push-pull plate 72. At this time, the plug plate 71 moves to the surface of the rotating plate 5, and then the box cover 22 is flipped 180° and installed on the top surface of the shell 11.

[0031] A second partition 216 is connected to the bottom surface of the box body 21, and the top surface of the second partition 216 is attached to the bottom surface of the battery pack 3. Non-removable fire extinguishing agent bags 8 are arranged between adjacent second partitions 216 and between the second partition 216 and the side plate of the box body 21; when a fire occurs in the battery pack 3, the flame of the burning battery pack 3 acts on the non-removable fire extinguishing agent bag 8, burning the packaging bag, exposing the fire extinguishing agent to the outside, blocking the fire, and after the removable fire extinguishing agent bag 6 fails to further control the fire, the fire extinguishing agent in the non-removable fire extinguishing agent bag 8 prevents the fire from spreading.

[0032] A plurality of third partitions 217 are connected to the inner wall of the side plate of the box body 21. The third partitions 217 are arranged around the box body 21 and are attached to the side of the battery pack 3. Non-detachable fire extinguishing agent bags 8 are also arranged between adjacent third partitions 217. After the non-detachable fire extinguishing agent bags 8 are burned, the fire extinguishing agent flows to the side of the battery pack 3 to further control the fire.

[0033] A sealing ring 218 is embedded around the top surface of the box body 21 , and the pressing plate 221 is pressed against the top surface of the sealing ring 218 . The sealing ring 218 seals the gap between the pressing plate 221 and the box body 21 .

[0034] The implementation principle of a safety protection device for a modular green battery pack in the embodiment of the present application is as follows: when the vehicle is driving, wind enters the first heat dissipation channel 13 from the air inlet 111 and is then discharged from the air outlet 112; when the heat generated by the battery pack 3 is working, the heat is transferred to the first heat dissipation channel 13, the second heat dissipation channel 14 and the third heat dissipation channel 15 through the installation box 2. Since there is air flow in the first heat dissipation channel 13, the heat collected in the second heat dissipation channel 14 and the third heat dissipation channel 15 will flow to the first heat dissipation channel 13, so as to dissipate heat in the shell 11; when one of the battery packs 3 collides and catches fire, due to Each battery pack 3 is wrapped by the installation box 2, and the fire will not spread out of the installation box 2. In addition, each installation box 2 is not close to each other, and the fire will not spread to the other battery packs 3. In order to prevent violent combustion inside the installation box 2 and cause excessive pressure inside the installation box 2, a sealing plug 212 is provided. When the pressure is too high, the sealing plug 212 will be pushed open by the pressure; when the pressure is not enough to push the sealing plug 212, the sealing plug 212 cooperates with the installation box 2 to isolate the battery pack 3 from the outside world to prevent air from entering, which helps to suppress the fire, thereby preventing the entire vehicle from being ignited, and giving passengers enough time to evacuate, thereby improving the safety of the passengers.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A safety protection device for a modular green battery pack, characterized in that: The invention comprises a housing (1), a mounting box (2) and a battery pack (3), wherein the housing (1) comprises a shell (11) and a shell cover (12), wherein the bottom surface of a side plate around the shell cover (12) is connected to the top surface of a side plate around the shell (11), wherein a plurality of the mounting boxes (2) and the battery pack (3) are provided, wherein each battery pack (3) is installed in one mounting box (2), wherein the mounting box (2) is connected to the inner bottom surface of the shell (11), wherein the plurality of mounting boxes (2) are divided into two groups, wherein one group of the mounting boxes (2) is located on one side of the shell (11), and the other group of the mounting boxes (2) is located on the other side of the shell (11), and a first heat dissipation channel (13) is provided between the two groups of the mounting boxes (2); The installation box (2) comprises a box body (21) and a box cover (22); the bottom surface of the box body (21) is connected to the bottom surface of the shell (11); a pressing plate (221) is connected around the bottom surface of the box cover (22); the pressing plate (221) is pressed against the top surface of the side plate of the box body (21); the battery pack (3) is installed in the box body (21); the side plate of the box body (21) close to another group of the installation boxes (2) is provided with a through hole (211) connected to the first heat dissipation channel (13); a sealing plug (212) is inserted into the through hole (211); and the two ends of the shell (11) are respectively provided with an air inlet (111) and an air outlet (112) connected to the first heat dissipation channel (13).

2. A safety protection device for a modular green battery pack according to claim 1, characterized in that: A second heat dissipation channel (14) is provided between each group of adjacent installation boxes (2), and a third heat dissipation channel (15) is provided between each group of installation boxes (2) and the inner wall of the housing (11).

3. A modular green battery pack safety protection device according to claim 1, characterized in that: The side plate of the box body (21) away from the through hole (211) is provided with a socket (213), and the socket (213) is plugged with an insert block (214) from the inside of the box body (21), and the top surface of the end of the insert block (214) located in the box body (21) is connected to two first conductive pillars (2141), and the side of the battery pack (3) close to the socket (213) is provided with a mounting block (31), and the bottom surface of the mounting block (31) is provided with two first conductive rings (311), and the two first conductive rings (311) are respectively connected to the positive and negative electrodes of the battery pack (3), and the first conductive pillars (2141) are plugged into the first conductive rings (311), and the two first conductive pillars (2141) are used to connect to an external circuit.

4. A safety protection device for a modular green battery pack according to claim 3, characterized in that: The top surface of the end of the plug block (214) outside the box body (21) is provided with two second conductive rings (2142), and the two second conductive rings (2142) are respectively connected to the two first conductive pillars (2141) through wires; a moving block (215) is provided outside the box body (21), and the bottom surface of one end of the moving block (215) is provided with two second conductive pillars (2151), and the two second conductive pillars (2151) are respectively inserted into the two second conductive rings (2142); two third conductive rings (2152) are passed through the end of the moving block (215) away from the second conductive pillars (2151), and the two third conductive rings (2152) are respectively connected to the two second conductive pillars (2151) through wires. 1); the inner wall of the shell (11) is connected to a first fixed block (113) and a second fixed block (114); two third conductive pillars (1131) are connected below the first fixed block (113), and the two third conductive pillars (1131) are connected by wires; the top surface of the second fixed block (114) is connected to two fourth conductive pillars (1141), the fourth conductive pillars (1141) are inserted into the two third conductive rings (2152) and pass through the top of the third conductive ring (2152), and the adjacent fourth conductive pillars (1141) between adjacent second fixed blocks (114) are connected by a line (16); a driving mechanism (4) for driving the moving block (215) to rise and fall is arranged in the shell (1).

5. A safety protection device for a modular green battery pack according to claim 4, characterized in that: The driving mechanism (4) comprises a vertical plate (41), a horizontal plate (42), a guide rod (43) and a driving assembly (44); two vertical plates (41) are provided, the bottom end of each vertical plate (41) is connected to the top surface of the moving block (215), the vertical plate (41) is located between the first fixed block (113) and the outer wall of the box body (21), and the horizontal plate (42) is connected to the top ends of the two vertical plates (41); the driving assembly (44) is installed on the inner wall of the shell (11), and the driving assembly (44) is used to drive the horizontal plate (42) to rise and fall.

6. A safety protection device for a modular green battery pack according to claim 5, characterized in that: The driving assembly (44) comprises a support frame (441), a motor (442), a worm (443), a worm wheel (444) and a screw (445); the bottom end of the support frame (441) is connected to the inner wall of the housing (11), the motor (442) is installed on the top end of the support frame (441), the top surface of the motor (442) is connected to a support plate (4421), the top end of the screw (445) is rotatably connected to the end of the support plate (4421), the bottom end of the screw (445) passes through the bottom surface of the cross plate (42) and is threadedly driven with the cross plate (42); the end of the worm (443) is connected to the output shaft of the motor (442), the worm wheel (444) is coaxially connected to the top end of the screw (445), and the worm wheel (444) is meshed with the worm (443).

7. A safety protection device for a modular green battery pack according to claim 5, characterized in that: The bottom surface of the box cover (22) is connected to a plurality of first partitions (222), and the two ends of the first partitions (222) are connected to the inner side surface of the pressing plate (221); two rotating plates (5) are arranged between two adjacent first partitions (222), and the sides of the two rotating plates (5) that are away from each other are connected to rotating rods (51), and the two ends of the rotating rods (51) extend out of the rotating plates (5), and the rotating rods (51) are rotatably connected to the inside of the pressing plate (221); and a detachable The fire extinguishing agent bag (6) is located above the rotating plate (5), the bag opening of the detachable fire extinguishing agent bag (6) passes through between the two rotating plates (5) and is respectively adhered to the bottom surfaces of the two rotating plates (5), and the inner wall of the opening of the detachable fire extinguishing agent bag (6) located between the two rotating plates (5) is adhered to each other; the outer wall of the detachable fire extinguishing agent bag (6) is adhered to the first partition plate (222) and the side wall of the box cover (22); the clamping plate (221) is provided with a limiting mechanism (7) for limiting the rotation of the rotating plate (5).

8. A safety protection device for a modular green battery pack according to claim 7, characterized in that: The limiting mechanism (7) comprises a plug plate (71), a push-pull plate (72) and a wedge block (73). A plurality of the plug plates (71) are provided, and each of the plug plates (71) corresponds to a detachable fire extinguishing agent bag (6). The plug plate (71) is plugged into the clamping plate (221) on the side close to the driving mechanism (4). The end of the plug plate (71) is located on the bottom surface of one end of the rotating plate (5). The other end of the plug plate (71) passes through the outside of the clamping plate (221). The push-pull plate (72) is provided on the outside of the clamping plate (221). The side surface of the push-pull plate (72) is connected to the plug plate (71). end; two wedge blocks (73) are provided, and the two wedge blocks (73) are respectively connected to the side surfaces of the two vertical plates (41) away from each other, and the tip of the wedge block (73) faces upward; a groove (721) is provided on the side of the push-pull plate (72) away from the clamping plate (221), and the groove (721) is for the two wedge blocks (73) to pass through; the two symmetrical side walls of the groove (721) are connected to a stopper (722), and the wedge block (73) is located on the side of the stopper (722) close to the clamping plate (221), and the side of the wedge block (73) faces the stopper (722).

9. A safety protection device for a modular green battery pack according to claim 8, characterized in that: Two magnets (2211) are embedded on the side of the pressing plate (221) close to the push-pull plate (72), and the two magnets (2211) are used to adsorb the push-pull plate (72).

10. The safety protection device for a modular green battery pack according to claim 7, characterized in that: The bottom surface of the box body (21) is connected to a second partition plate (216), the top surface of the second partition plate (216) is attached to the bottom surface of the battery pack (3), and non-detachable fire extinguishing agent bags (8) are arranged between adjacent second partition plates (216) and between the second partition plates (216) and the side plates of the box body (21); the inner wall of the side plates of the box body (21) is connected to a plurality of third partition plates (217), the third partition plates (217) are arranged around the box body (21), the third partition plates (217) are attached to the side surfaces of the battery pack (3), and the non-detachable fire extinguishing agent bags (8) are also arranged between adjacent third partition plates (217).

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