A lithium battery pack for industrial and commercial energy storage with low temperature resistance

Abstract

The present invention complies with the technical field of lithium batteries, and specifically discloses a lithium battery pack for industrial and commercial energy storage with anti-low temperature function. The problem that the total amount of temperature loss of the battery core of the existing lithium battery pack is large, resulting in a large amount of electricity required to keep the lithium battery pack warm. It includes a bottom shell, the upper part of the bottom shell is fixedly connected to the top shell and the guide shell, the bottom shell is fixedly connected to evenly distributed battery cores, the bottom shell is fixedly connected to symmetrically distributed fixed columns, the fixed columns are rotatably connected to evenly distributed rotating gears, and the symmetrically distributed rotating gears are rotatably connected to a thick insulation board. The present invention seals and insulates the battery core through a thick insulation board, and at the same time, divides the evenly distributed battery cores into different sealed spaces, thereby reducing the temperature loss rate of the battery core near the middle, thereby reducing the energy consumption of keeping the battery core in the middle position warm, and increasing the single use cycle of the lithium battery pack.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium batteries, and specifically discloses a lithium battery pack for industrial and commercial energy storage with a low temperature resistance function. Background Art

[0002] Lithium battery packs for industrial and commercial energy storage are used to provide customers with safe, reliable and sustainable electricity in an environment without electricity. Because the power storage function of lithium battery packs will be weakened in low temperature environments, the power loss of lithium battery packs in low temperature environments is serious and the storage capacity is reduced, resulting in a shorter single-use cycle of the lithium battery pack (the time between two charges) when the customer uses the lithium battery pack. In order to combat low temperature environments, existing lithium battery packs are usually equipped with insulation boards and heating devices at the same time. All battery cores of existing lithium battery packs are in the same space, resulting in the same temperature loss rate for all battery cores, and the total amount of temperature loss for all battery cores is large. The existing heating device must heat the entire lithium battery pack when keeping the lithium battery pack warm, which results in higher energy consumption of the existing heating device. At the same time, the power stored in the existing lithium battery pack will still be consumed in large quantities to maintain the operation of the heating device, which will also shorten the single-use cycle of the lithium battery pack. Summary of the invention

[0003] In order to overcome the disadvantages of existing lithium battery packs that the total amount of temperature loss in the battery core is large, resulting in a large amount of electricity required to keep the lithium battery pack warm, the present invention provides a lithium battery pack for industrial and commercial energy storage with low temperature resistance function.

[0004] The technical implementation scheme of the present invention is as follows: a lithium battery pack for industrial and commercial energy storage with low temperature resistance function, comprising a bottom shell, a top shell and a guide shell are fixedly connected to the upper part of the bottom shell, wherein the guide shell is located between the bottom shell and the top shell, a battery core is fixedly connected to the bottom shell with uniform distribution, a temperature monitoring device is installed on the battery core, the bottom shell is provided with symmetrically distributed vents, and the vents of the bottom shell are fixedly connected with symmetrically distributed fixing columns, the fixing columns are rotatably connected with uniformly distributed rotating gears, the symmetrically distributed rotating gears are rotatably connected with thick insulation boards together, and two adjacent thick insulation boards are fixedly connected to the bottom shell with uniform distribution of rotating gears. The bottom shell is extruded and sealed, and several groups of telescopic frames are evenly distributed and slidably connected in the bottom shell, each group includes two symmetrically distributed telescopic frames, and the telescopic frames in the same group are rotatably connected to a uniformly distributed middle insulation board, and two adjacent middle insulation boards are extruded and sealed, and the middle insulation board is fixed with a symmetrically distributed heating device. The bottom shell is provided with symmetrically distributed external power mechanisms for driving the adjacent thick insulation boards to rotate, and the telescopic frames are provided with a transmission mechanism for rotating the middle insulation boards in the same group together, and the guide shell is provided with an internal power mechanism for driving all the telescopic frames to move together.

[0005] More preferably, the external power mechanism includes symmetrically distributed first electric push rods, which are all fixed to the bottom shell near the adjacent fixed column, the telescopic end of the first electric push rod is fixed with a rack meshing with the adjacent rotating gear, a first elastic member is fixed between the rotating gear and the adjacent thick insulation board, the thick insulation board is slidably connected with a sealing plate, the sealing plate is fixed with a rack meshing with the adjacent rotating gear, and a symmetrically distributed first sealing plate is fixed to one side of the bottom shell near the adjacent vent, and the first sealing plate is sealed with the adjacent thick insulation board.

[0006] More preferably, the width of the thick insulation board is smaller than the width of the battery core, and the upper and lower ends of the middle insulation board are both arranged as inclined surfaces parallel to each other.

[0007] More preferably, the transmission mechanism includes a uniformly distributed second elastic member, the second elastic member is fixed between the adjacent telescopic frame and the adjacent middle insulation board, the telescopic frame is fixed with uniformly distributed elastic air bags, the bottom shell is fixed with symmetrically distributed second sealing plates, and the second sealing plates are sealed and matched with the adjacent middle insulation board.

[0008] More preferably, the bottom shell is fixedly connected to a plurality of air guide plates, the air guide plates are fixedly connected to the battery inner core, the guide shell is provided with evenly distributed air inlets, the top shell is provided with evenly distributed air guide surfaces, the air guide surfaces correspond one-to-one to the air inlets, and the air inlets are located between two adjacent air guide plates.

[0009] More preferably, the internal power mechanism includes a plurality of evenly distributed groups of pneumatic telescopic rods, each group includes symmetrically distributed pneumatic telescopic rods, the pneumatic telescopic rods are fixed to the upper side of the guide shell, the pneumatic telescopic rods are connected to the elastic airbags on the adjacent telescopic frames, the guide shell is fixed with symmetrically distributed second electric push rods, the telescopic ends of the second electric push rods are fixed with first sliding rods, the telescopic ends of the pneumatic telescopic rods are fixed with second sliding rods, the second sliding rods are slidably connected to the guide shell, a third elastic member is fixed between the second sliding rod and the adjacent first sliding rod, and the upper side of the guide shell is provided with evenly distributed sealing components respectively used to close the adjacent air inlets.

[0010] More preferably, the sealing component includes symmetrically distributed sealing plates, which are all slidably connected to the guide shell near the adjacent air inlet, a fourth elastic member is fixed between one of the sealing plates and the guide shell, and the sealing plate is squeezed and fitted with the adjacent second sliding rod, the guide shell is fixed with several groups of fixed gears, each group includes symmetrically distributed fixed gears, and the sealing plate is fixed with a rack meshing with the adjacent fixed gear.

[0011] More preferably, a plurality of evenly distributed groups of third electric push rods are fixedly connected to the lower portion of the bottom shell, each group includes symmetrically distributed third electric push rods, and the telescopic ends of the third electric push rods are fixedly connected with extrusion blocks, which are extruded and matched with the adjacent telescopic frames.

[0012] More preferably, it also includes a vacuum mechanism for extracting air between the top shell and the guide shell, the vacuum mechanism is arranged on the lower side of the top shell, the vacuum mechanism includes an electric slide rail, the electric slide rail is fixed to the upper side of the top shell, the electric slide rail is slidably connected to a thermal insulation sealing block, the top shell and the guide shell are both sealed with the thermal insulation sealing block, and the top shell is provided with a one-way exhaust valve.

[0013] More preferably, a uniformly distributed high-pressure injection shell is fixed to the lower side of the top shell.

[0014] Compared with the prior art, the present invention has at least the following advantages: while the present invention seals and insulates the battery core through a thick insulation plate, it divides the evenly distributed battery core into different sealed spaces, thereby reducing the temperature loss rate of the battery core near the middle, thereby reducing the energy consumption of insulating the battery core in the middle position and increasing the single use cycle of the lithium battery pack.

[0015] The present invention guides the wind by cooperating with each other through the wind guide plate, the wind guide surface and the air inlet, thereby ensuring that the battery core is sufficiently cooled. At the same time, the adjacent air inlet is sealed by the sealing plate, and the space between the top shell and the guide shell is evacuated to a vacuum state, thereby enhancing the heat preservation effect of the top shell and the guide shell on the battery core.

[0016] The present invention prevents the telescopic frame and adjacent components from moving downward when the temperature of the battery core is abnormal, and controls the high-pressure spray shell to timely extinguish the fire or urgently cool down the battery core, thereby ensuring a safe use environment for the battery core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2It is a schematic diagram of the structure of the bottom shell, the top shell and the guide shell of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the bottom shell, the battery core and the thick insulation board of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the first electric push rod, the sealing plate and the first sealing plate of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the first elastic member, the thick insulation board and the sealing board of the present invention;

[0022] Figure 6 It is a schematic structural diagram of the telescopic frame, the middle insulation board and the heating device of the present invention;

[0023] Figure 7 It is a cross-sectional view of the telescopic frame, the middle insulation board and the heating device of the present invention;

[0024] Figure 8 It is a schematic diagram of the telescopic frame, the middle insulation board and the heating device of the present invention;

[0025] Fig. 9 It is a schematic diagram of the structure of the top shell, the guide shell and the battery core of the present invention;

[0026] Fig.10 It is a schematic diagram of the structure of the bottom shell, the guide shell and the battery core of the present invention;

[0027] Fig.11 It is a schematic structural diagram of the pneumatic telescopic rod, the first sliding rod and the second sliding rod of the present invention;

[0028] Fig.12 It is a schematic structural diagram of the second sliding rod, the third elastic member and the sealing plate of the present invention;

[0029] Fig.13 An exploded view of the second electric push rod, the first sliding rod and the second sliding rod of the present invention;

[0030] Fig.14 It is a schematic diagram of the structure of the top shell, the guide shell and the high-pressure injection shell of the present invention.

[0031] The accompanying drawings include the following figure marks: 1, bottom shell, 2, top shell, 3, guide shell, 4, battery core, 5, fixed column, 6, rotating gear, 7, thick insulation board, 8, telescopic frame, 9, middle insulation board, 10, heating device, 11, first electric push rod, 12, first elastic member, 13, sealing plate, 14, first sealing plate, 15, second elastic member, 16, elastic airbag, 17, second sealing plate, 18, air guide plate, 201, air guide surface, 301, air inlet, 20, pneumatic telescopic rod, 21, second electric push rod, 22, first sliding rod, 23, second sliding rod, 24, third elastic member, 25, sealing plate, 26, fourth elastic member, 27, fixed gear, 28, third electric push rod, 29, extrusion block, 30, electric slide rail, 31, insulation sealing block, 32, one-way exhaust valve, 33, high-pressure injection shell. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work, such as changing the number and distribution of the battery core 4 and the corresponding components, are within the scope of protection of the present invention.

[0033] Embodiment 1: In order to ensure sufficient heat dissipation during use, all the existing battery cores 4 are placed in the same space. As a result, when the battery cores 4 are not in use, the temperature loss rate of all the battery cores 4 is the same. When the existing heating device is used to heat the battery cores 4, all the battery cores 4 must be heated uniformly, resulting in high energy consumption of the existing heating device, causing the single use cycle of the existing lithium battery pack to be short.

[0034] In view of the above technical problems, the present invention proposes a lithium battery pack for industrial and commercial energy storage with low temperature resistance function. Figure 1 -Attached Figure 6, including a bottom shell 1 and a matching remote control terminal, the top of the bottom shell 1 is fixedly connected to a top shell 2 and a guide shell 3, wherein the guide shell 3 is located between the bottom shell 1 and the top shell 2, and the guide shell 3 and the top shell 2 together form a ventilation duct for ventilating the battery core 4 in the middle to cool the battery core 4 in the middle, the bottom shell 1 is provided with two vents symmetrically distributed on the left and right, the existing ventilation device sends wind into the bottom shell 1 from the vents and ventilation duct on the right side to cool the battery core 4, a plurality of battery cores 4 evenly distributed are fixedly connected in the bottom shell 1, and the battery core 4 is equipped with electrical connections with the remote control terminal The temperature monitoring device connected, two fixed columns 5 symmetrically distributed front and back are fixedly connected to the ventilation opening of the bottom shell 1, and the opposite sides of the two fixed columns 5 are rotatably connected with evenly distributed rotating gears 6, and the two symmetrically distributed rotating gears 6 are rotatably connected with a thick insulation board 7 together. The width of the thick insulation board 7 is smaller than the width of the battery inner core 4, which is used to make the wind flow closely against the outermost battery inner core 4. The upper and lower sides of the thick insulation board 7 are set as inclined surfaces parallel to each other. When two adjacent thick insulation boards 7 are in a vertical state, the adjacent inclined surfaces of the two are tightly fitted to seal the adjacent ventilation openings and keep the battery inner core 4 warm. A plurality of evenly distributed groups of telescopic frames 8 are slidably connected in the housing 1, and the number of groups corresponds to the number of battery cores 4. Each group of telescopic frames 8 is located between two adjacent battery cores 4 and is used to separate each battery core 4. Each group includes two telescopic frames 8 symmetrically distributed front and back. The telescopic frames 8 in the same group are rotatably connected with evenly distributed middle insulation plates 9. The upper and lower sides of the middle insulation plates 9 are arranged as inclined surfaces parallel to each other. When the two adjacent middle insulation plates 9 are in a vertical state, the inclined surfaces of the two are in close contact with each other, so that the space where the two adjacent battery cores 4 are located is separated. When the two closely contacted middle insulation plates 9 are in a When the adjacent telescopic frames 8 move upward, the two middle insulation plates 9 rotate counterclockwise (from front to back) under the extrusion of the adjacent inclined surfaces, so that the middle insulation plates 9 in the same group shrink upward together. The middle insulation plates 9 are fixedly connected with symmetrically distributed heating devices 10. The bottom shell 1 is provided with symmetrically distributed external power mechanisms for driving the adjacent thick insulation plates 7 to rotate. The telescopic frames 8 are provided with transmission mechanisms for rotating the middle insulation plates 9 in the same group together. The guide shell 3 is provided with an internal power mechanism for driving all the telescopic frames 8 to move together. Both the external power mechanism and the internal power mechanism are electrically connected to the remote control terminal.

[0035] Please refer to the attached Figure 3 -Attached Figure 5The external power mechanism includes a first electric push rod 11 which is symmetrically distributed front and back and fixed to the bottom shell 1. The two first electric push rods 11 are electrically connected to the control terminal, and the two first electric push rods 11 are located between the fixed column 5 and the adjacent battery core 4. The telescopic end of the first electric push rod 11 is fixed with a rack meshing with the adjacent rotating gear 6, which is used to actively drive the rotating gear 6 to rotate. A first elastic member 12 is fixed between the rotating gear 6 and the adjacent thick insulation board 7. The first elastic member 12 is a torsion spring. The rotating gear 6 drives the adjacent thick insulation board 7 to rotate through the adjacent first elastic member 12. A sealing plate 13 is slidably connected to the upper side of the thick insulation board 7. The sealing plate 13 is fixed with a rack meshing with the adjacent rotating gear 6. When the thick insulation board 7 follows the adjacent rotating gear 6, the thick insulation board 7 is rotated. When the gear 6 rotates together, the sealing plate 13 and the adjacent thick insulation plate 7 remain relatively still. When the thick insulation plate 7 cannot rotate, the rotating gear 6 rotates relative to the adjacent thick insulation plate 7, and at the same time, the adjacent sealing plate 13 is driven to slide relative to the adjacent thick insulation plate 7 through the rack. The sealing plate 13 blocks the joints between the two adjacent thick insulation plates 7 to enhance the sealing effect of the thick insulation plates 7. A first sealing plate 14 symmetrically distributed in the upper and lower parts is fixedly connected to the side of the bottom shell 1 close to the adjacent vent. The first sealing plate 14 is provided with an inclined surface parallel to the upper and lower surfaces of the thick insulation plate 7 in a vertical state, and is used to seal the thick insulation plate 7. The lower first sealing plate 14 is close to the side of the adjacent first electric push rod 11 and is provided with a block with a similar function to the sealing plate 13.

[0036] Please see attached Figure 6 -Attached Figure 8 The transmission mechanism includes second elastic members 15 that are evenly distributed and respectively fixed between adjacent telescopic frames 8 and adjacent middle insulation boards 9. The second elastic members 15 are torsion springs. When the telescopic frames 8 are in an upwardly contracted state, the second elastic members 15 are in a force storage state, and are used to synchronously drive the adjacent middle insulation boards 9 to rotate to a vertical state during the downward expansion of the adjacent telescopic frames 8. Evenly distributed elastic air bags 16 are fixed in the telescopic frames 8 to control the expansion and contraction of the telescopic frames 8. When the telescopic frames 8 are fully extended and expanded, the elastic air bags 16 cooperate with the telescopic frames 8 to seal the sides of the middle insulation boards 9 to ensure that the battery cores 4 on the left and right sides of the middle insulation boards 9 are in a completely separated state. Two second sealing plates 17 symmetrically distributed up and down are fixed in the bottom shell 1. The second sealing plates 17 are provided with inclined surfaces parallel to the upper and lower inclined surfaces of the adjacent middle insulation boards 9, and are used to seal with the adjacent inclined surfaces of the middle insulation boards 9 to separate the two adjacent battery cores 4.

[0037] Please see attached Fig. 9 and attached Fig.10The bottom shell 1 is fixedly connected with a plurality of air guide plates 18, which are fixedly connected with the battery inner core 4. The lower side of the guide shell 3 is provided with a plurality of evenly distributed air inlets 301, which are located above the adjacent telescopic frame 8. The lower side of the top shell 2 is provided with a plurality of evenly distributed air guide surfaces 201, which are inclined surfaces for guiding wind to adjacent air inlets 301, thereby ensuring that wind flows between two adjacent battery inner cores 4, and sufficiently dissipating the heat of the battery inner core 4.

[0038] Please refer to the attached Fig.11 -Attached Fig.13 The internal power mechanism includes a plurality of groups of pneumatic telescopic rods 20 evenly distributed and fixed to the upper side of the guide shell 3. The number of groups corresponds to the number of battery cores 4. Each group includes two pneumatic telescopic rods 20 symmetrically distributed front and back. The pneumatic telescopic rods 20 are connected to all the elastic airbags 16 on the adjacent telescopic frames 8 to supply air to all the elastic airbags 16 on the adjacent telescopic frames 8. The left side of the guide shell 3 is fixed with two second electric push rods 21 symmetrically distributed front and back. The telescopic ends of the second electric push rods 21 are fixed with the first sliding rod 22. The telescopic ends of the pneumatic telescopic rods 20 are fixed with There is a second sliding rod 23, which is used to drive the telescopic end of the pneumatic telescopic rod 20 to move, thereby controlling the expansion or contraction of all the elastic airbags 16 on the adjacent telescopic frame 8. The second sliding rod 23 is slidably connected to the guide shell 3. A third elastic member 24 is fixed between the second sliding rod 23 and the adjacent first sliding rod 22. The third elastic member 24 is a tension spring. When one of the second sliding rods 23 cannot move, the second sliding rod 23 will not hinder the movement of the adjacent first sliding rod 22. The upper side of the guide shell 3 is provided with evenly distributed sealing components that are respectively used to close the adjacent air inlets 301.

[0039] Please refer to the attached Fig.11 and attached Fig.12 The sealing component includes two sealing plates 25 symmetrically distributed on the left and right. The two sealing plates 25 are slidably connected to the guide shell 3 near the adjacent air inlet 301, wherein a fourth elastic member 26 is fixedly connected between the sealing plate 25 on the left side of the same group and the guide shell 3, and the fourth elastic member 26 is a tension spring. When the lower side of the second sliding rod 23 squeezes the adjacent sealing plate 25, the adjacent sealing plate 25 is driven to move together. The guide shell 3 is fixedly connected to a plurality of groups of fixed gears 27, and the number of groups corresponds to the number of battery cores 4. Each group includes two fixed gears 27 symmetrically distributed front and back. The sealing plate 25 is fixedly connected to a rack meshing with the adjacent fixed gears 27, which is used to drive the two adjacent sealing plates 25 to synchronously approach or move away from each other.

[0040] Please refer to the attached Figure 8A plurality of evenly distributed groups of third electric push rods 28 are fixedly connected to the lower part of the bottom shell 1, and the number of groups corresponds to the number of battery cores 4, and the third electric push rods 28 are electrically connected to the remote control terminal, and each group includes two third electric push rods 28 symmetrically distributed front and back, and the telescopic end of the third electric push rod 28 is upward and fixedly connected with a squeezing block 29, and the squeezing block 29 is squeezed and matched with the adjacent telescopic frame 8. When the telescopic end of the third electric push rod 28 is extended upward, the telescopic frame 8 is squeezed by the adjacent squeezing block 29 and cannot be extended downward to the longest state, thereby making it impossible for the gas of the adjacent pneumatic telescopic rod 20 to be completely discharged, and the adjacent second sliding rod 23 will not squeeze the adjacent sealing plate 25 to move and close the adjacent air inlet 301.

[0041] When using the device, the staff first connects the ventilation device with the ventilation port on the right side of the device. The ventilation device sends wind into the space between the bottom shell 1 and the guide shell 3 (at this time, the thick insulation board 7, the middle insulation board 9 and the sealing board 25 are all considered to be in the open state and do not interfere with the wind direction), and sends wind into the space between the top shell 2 and the guide shell 3. The wind entering the space between the bottom shell 1 and the guide shell 3 flows from right to left to dissipate the heat of the battery core 4. The wind entering the space between the top shell 2 and the guide shell 3 generates a downward diversion when flowing from right to left through the air guide surface 201. The diverted wind flows to the lower left side and enters between the two battery cores 4 through the adjacent air inlet 301 to dissipate the heat of the adjacent battery cores 4, thereby ensuring that the battery core 4 in the bottom shell 1 is always sufficiently cooled, because the inclination direction of the middle insulation board 9 is gradually from top to bottom. It is tilted to the right, so a part of the wind flowing downward through the air inlet 301 is blown onto the middle insulation plate 9, and the wind is guided to the right by the middle insulation plate 9 to dissipate the heat of the battery core 4 on the right. When the wind contacts the battery core 4 on the right during the flow, it flows in the opposite direction to the lower left side to dissipate the heat of the battery core 4 on the left. The wind repeats the above process to move in a zigzag route to dissipate the heat of adjacent battery cores 4, thereby improving the uniformity of the heat dissipation of the battery cores 4 on both sides. When the flowing wind finally flows out from the front and rear sides of the battery core 4, it merges into the wind entering between the bottom shell 1 and the guide shell 3 and flows to the right together. In the above process, because the air guide plate 18 always guides the wind flowing in the bottom shell 1, it prevents the wind in the bottom shell 1 from flowing between the two battery cores 4 and affecting the fluidity of the wind diverted through the air inlet 301.

[0042] When the staff no longer uses the device, the staff needs to seal and insulate the battery core 4 to prevent the battery core 4 from being in a low temperature environment, resulting in a serious loss of internal stored electricity due to the low temperature, thereby affecting the subsequent use of the battery core 4. The specific sealing steps are as follows (taking the first electric push rod 11 and adjacent components on the right side as an example):

[0043] The user first controls the two first electric push rods 11 to work through the remote control terminal, and the telescopic ends of the two first electric push rods 11 extend upward. At the same time, the rack on the first electric push rod 11 drives the adjacent rotating gear 6 to rotate, and the rotating gear 6 drives the adjacent thick insulation board 7 to rotate through the first elastic member 12, and the thick insulation board 7 drives the adjacent parts to rotate clockwise and close (from front to back). At this time, because the thick insulation board 7 and the rotating gear 6 rotate together, the sealing plate 13 does not move relative to the thick insulation board 7. When the thick insulation board 7 rotates to a vertical state, the two adjacent thick insulation boards 7 are tightly fitted together through the inclined surface, and both cannot continue Rotate clockwise, at this time, the telescopic end of the first electric push rod 11 continues to extend upward, and the rack on the telescopic end of the first electric push rod 11 continues to drive the adjacent rotating gear 6 to rotate. At this time, the rotating gear 6 and the thick insulation board 7 produce relative rotation, and the first elastic member 12 twists and stores force. When the rotating gear 6 rotates, the adjacent sealing plate 13 is driven upward through the adjacent rack transmission. The sealing plate 13 moves to the joint of the two adjacent thick insulation boards 7, and while assisting in fixing the two adjacent thick insulation boards 7, the sealing plate 13 assists in improving the seal between the two adjacent thick insulation boards 7 to enhance the insulation effect of the thick insulation boards 7. Then the staff closes the first electric push rod 11 through the remote control terminal.

[0044] After the staff turns off the first electric push rod 11, the second electric push rod 21 is synchronously started through the remote control terminal. The telescopic end of the second electric push rod 21 extends to drive the adjacent parts to move together. The first sliding rod 22 moves to the right driven by the telescopic end of the adjacent second electric push rod 21. During the movement, the first sliding rod 22 pulls the adjacent second sliding rod 23 to move together through the adjacent third elastic member 24. During the movement of the second sliding rod 23 to the right, the telescopic end of the adjacent pneumatic telescopic rod 20 is retracted. The gas in the pneumatic telescopic rod 20 is pressed into the adjacent elastic airbag 16. Because the gap elongation and shortening amount of the telescopic frame 8 remains unchanged when the telescopic frame 8 is telescopically moved, the inflation amount of the multiple elastic airbags 16 filled between the telescopic frames 8 remains unchanged. The elastic airbag 16 is inflated to make the telescopic frame 8 drive the adjacent parts to move downward. During the downward movement of the middle insulation plate 9, the two adjacent middle insulation plates 9 gradually move away from each other. The middle insulation plate 9 is driven by the adjacent second elastic member 15 to rotate clockwise (from front to back) until the telescopic frame 8 is extended to its longest state. The lowermost side of the telescopic frame 8 is tightly fitted with the adjacent extrusion block 29. At this time, the adjacent middle insulation plates 9 are rotated to a vertical state. The two adjacent middle insulation plates 9 are tightly fitted through the inclined surface. Each group of telescopic frames 8 and middle insulation plates 9 cooperate to separate the battery core 4, and the gap between the telescopic frames 8 is filled with the elastic airbag 16 to ensure that the space where the two adjacent battery cores 4 are located is completely separated to enhance the insulation effect of the battery core 4.

[0045] When the spaces where all the battery cores 4 are located are completely separated, the remote control terminal starts the heating device 10 to heat and keep the adjacent battery cores 4 warm by receiving data from the temperature sensors on the battery cores 4. Because the battery cores 4 are in different spaces, the distances between the battery cores 4 and the outside world are different (two left and right vents), so the heating temperatures required to keep different battery cores 4 warm are also different. The heating devices 10 near the left and right ends heat normally, and by reducing the heating power of the heating devices 10 near the middle, the energy consumption required for heating the battery cores 4 for insulation is reduced.

[0046] In the process of the first sliding rod 22 driving the adjacent second sliding rod 23 to move to the right, in the process of the second sliding rod 23 moving to the right, the adjacent sealing plate 25 is driven to move to the right together by squeezing, and the fourth elastic member 26 is stretched and stored. In the process of moving to the right, the sealing plate 25 drives the adjacent fixed gear 27 to rotate through the rack, and the rotation of the fixed gear 27 drives another adjacent sealing plate 25 to move to the left, and the two sealing plates 25 move towards each other to seal and close the adjacent air vents 301. When the two sealing plates 25 are sealed and matched, the user closes the second electric push rod 21 through the remote control terminal. When all adjacent sealing plates 25 are sealed and matched, all air vents 301 are closed to keep the battery core 4 warm.

[0047] When the user needs to use the device for power supply again, he only needs to perform reverse operation according to the above working principle through the remote control terminal to release the seal of the battery core 4 and dissipate heat from the battery core 4 again according to the same principle.

[0048] Embodiment 2: Existing lithium battery packs usually need to have a reasonable heat dissipation function. However, when the lithium battery pack needs to be sealed and insulated, the ventilation ducts used in the existing lithium battery packs will become channels for temperature loss, resulting in reduced thermal insulation performance of the lithium battery pack.

[0049] In view of the above problems, the present invention proposes a lithium battery pack for industrial and commercial energy storage with low temperature resistance function. Figure 2 , Attachment Fig. 9 and attached Fig.14, and also includes a vacuum mechanism for extracting air between the top shell 2 and the guide shell 3. The vacuum mechanism is arranged on the lower side of the top shell 2. The vacuum mechanism includes an electric slide rail 30. The electric slide rail 30 is electrically connected to the remote control terminal. The electric slide rail 30 is slidably connected to a heat preservation sealing block 31. When the heat preservation sealing block 31 moves downward, it blocks the ventilation duct composed of the top shell 2 and the guide shell 3. A one-way air extraction valve 32 electrically connected to the control terminal is arranged on the right side of the top shell 2. The one-way air extraction valve 32 consists of a one-way valve and an external air extraction mechanism. , used to evacuate the gas in the ventilation duct, and enhance the thermal insulation performance of the top shell 2 by maintaining a sub-vacuum state in the ventilation duct. The lower side of the top shell 2 is fixed with evenly distributed high-pressure injection shells 33 that are electrically connected to the control terminal. The lower side of the high-pressure injection shell 33 is provided with evenly distributed through holes. The high-pressure injection shell 33 is connected to an external high-pressure fire-extinguishing foam storage tank. The high-pressure injection shell 33 is used to spray high-pressure fire-extinguishing foam into the ventilation duct. The high-pressure fire-extinguishing foam flows through the opened air duct 301 to the battery core 4 that needs to extinguish the fire and cool down.

[0050] When the air duct 301 is closed, the remote control terminal controls the electric slide rail 30 to work, and the electric slide rail 30 drives the thermal insulation sealing block 31 to move downward. The thermal insulation sealing block 31 is sealed with the adjacent guide shell 3 to make the space between the top shell 2 and the guide shell 3 in a sealed state. At this time, the remote control terminal closes the electric slide rail 30 and starts the one-way exhaust valve 32. The one-way exhaust valve 32 extracts the air in the space between the top shell 2 and the guide shell 3, so that the space between the top shell 2 and the guide shell 3 is in a sub-vacuum state, thereby enhancing the insulation effect of the ventilation duct on the battery core 4.

[0051] When the device is not in use, the battery core 4 will swell due to long-term use. The swollen battery core 4 will hinder the telescopic frame 8 from driving the adjacent middle insulation plate 9 to move downward. At this time, the gas in the pneumatic telescopic rod 20 cannot be completely discharged into the adjacent elastic airbag 16, that is, the telescopic end of the pneumatic telescopic rod 20 cannot retract. At this time, the first sliding rod 22 cannot drive the related second sliding rod 23 to move together, the adjacent third elastic member 24 is stretched and stored, and the second sliding rod 23 also cannot drive the adjacent sealing plate 25 to move by squeezing. Therefore, the air inlet 301 adjacent to the swollen battery core 4 is always in an open state. Although the one-way exhaust valve 32 cannot evacuate the space between the top shell 2 and the guide shell 3 to a sub-vacuum state at this time, the space between the top shell 2 and the guide shell 3 is connected to the space where the swollen battery core 4 is located, and the space where the unswollen battery core 4 is located is normally closed, which will not affect the insulation performance of other battery cores 4.

[0052] When the temperature of the battery core 4 rises abnormally during use, the temperature sensor transmits data to the remote control terminal, and the remote control terminal cuts off the power to the device from the outside world. The remote control terminal urgently seals all the battery cores 4 according to the same steps as above, and while urgently isolating the battery core 4 with abnormal temperature, controls the third electric push rod 28 at the battery core 4 with abnormal temperature to work, and the telescopic end of the third electric push rod 28 extends to drive the extrusion block 29 to move upward, and the upward movement of the extrusion block 29 hinders the telescopic frame 8 from driving the adjacent middle insulation board 9 to move downward (if the battery core 4 is bulging, the adjacent telescopic frame 8 is also hindered and cannot be The high-pressure spray shell 33 is used to spray the fire-extinguishing foam into the space between the top shell 2 and the guide shell 3. The fire-extinguishing foam flows into the battery core 4 with abnormal temperature and the bulging battery core 4 through the opened air vents 301, filling the space around the battery core 4, cooling the battery core 4 while preventing it from spontaneous combustion, and performing emergency cooling treatment on the battery core 4.

[0053] While the present disclosure has been shown and described with reference to particular exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined in all of the foregoing descriptions and their equivalents.

Claims

1. A lithium battery pack for industrial and commercial energy storage with low temperature resistance, comprising a bottom shell (1), a top shell (2) and a flow guide shell (3) fixedly connected to the upper part of the bottom shell (1), wherein the flow guide shell (3) is located between the bottom shell (1) and the top shell (2), and evenly distributed battery cores (4) are fixedly connected to the bottom shell (1), and a temperature monitoring device is installed on the battery core (4), wherein the battery core (4) is characterized in that: The invention also comprises symmetrically distributed ventilation holes, the ventilation holes are arranged on the bottom shell (1), the ventilation holes of the bottom shell (1) are fixedly connected with symmetrically distributed fixing columns (5), the fixing columns (5) are rotatably connected with evenly distributed rotating gears (6), the symmetrically distributed rotating gears (6) are rotatably connected with thick insulation boards (7), two adjacent thick insulation boards (7) are squeezed and sealed, and the bottom shell (1) is slidably connected with a plurality of evenly distributed groups of telescopic frames (8), each group includes two symmetrically distributed telescopic frames (8), the number of groups of the telescopic frames (8) corresponds to the number of the battery inner cores (4), and each group of the telescopic frames (8) is located adjacent to the battery inner cores (4). Between the two battery inner cores (4), each of the battery inner cores (4) is separated, the telescopic frames (8) in the same group are connected to the evenly distributed middle insulation plates (9) in a rotating manner, the two adjacent middle insulation plates (9) are squeezed and sealed, the middle insulation plates (9) are fixedly connected to the symmetrically distributed heating devices (10), the bottom shell (1) is provided with symmetrically distributed external power mechanisms respectively used to drive the adjacent thick insulation plates (7) to rotate, the telescopic frames (8) are provided with a transmission mechanism for rotating the middle insulation plates (9) in the same group together, and the guide shell (3) is provided with an internal power mechanism for driving all the telescopic frames (8) to move together; The transmission mechanism comprises uniformly distributed second elastic members (15), the second elastic members (15) being fixed between the adjacent telescopic frames (8) and the adjacent middle thermal insulation plates (9), the telescopic frames (8) being fixed with uniformly distributed elastic air bags (16), the bottom shell (1) being fixed with symmetrically distributed second sealing plates (17), the second sealing plates (17) being in sealing cooperation with the adjacent middle thermal insulation plates (9); The upper and lower sides of the middle insulation plate (9) are both arranged as mutually parallel inclined surfaces, and when two adjacent middle insulation plates (9) are in a vertical state, the inclined surfaces of the two plates are in close contact with each other, so that the spaces where the two adjacent battery cores (4) are located are separated; The elastic airbag (16) is used to control the extension and retraction of the telescopic frame (8); when the telescopic frame (8) is fully extended and unfolded, the elastic airbag (16) cooperates with the telescopic frame (8) to seal the side of the middle insulation plate (9), thereby ensuring that the battery cores (4) on the left and right sides of the middle insulation plate (9) are in a completely separated state; the second sealing plate (17) is provided with an inclined surface parallel to the upper and lower inclined surfaces of the adjacent middle insulation plate (9), and is used to seal with the adjacent inclined surfaces of the middle insulation plate (9) to separate two adjacent battery cores (4); The internal power mechanism comprises a plurality of evenly distributed groups of pneumatic telescopic rods (20), each group comprising symmetrically distributed pneumatic telescopic rods (20), the pneumatic telescopic rods (20) being fixedly connected to the upper side of the guide shell (3), the pneumatic telescopic rods (20) being communicated with the elastic airbags (16) on the adjacent telescopic frames (8), the guide shell (3) being fixedly connected with symmetrically distributed second electric push rods (21), the telescopic ends of the second electric push rods (21) being fixedly connected with the first sliding rods (22), the telescopic ends of the pneumatic telescopic rods (20) being fixedly connected with the second sliding rods (23), the second sliding rods (23) being slidably connected to the guide shell (3), a third elastic member (24) being fixedly connected between the second sliding rods (23) and the adjacent first sliding rods (22), and the upper side of the guide shell (3) being provided with evenly distributed sealing components respectively used for closing adjacent air inlets (301).

2. The lithium battery pack for industrial and commercial energy storage with low temperature resistance according to claim 1 is characterized in that: The external power mechanism comprises symmetrically distributed first electric push rods (11), which are all fixedly connected to the bottom shell (1) at positions close to the adjacent fixed columns (5), the telescopic ends of the first electric push rods (11) are fixedly connected to a rack meshing with the adjacent rotating gear (6), a first elastic member (12) is fixedly connected between the rotating gear (6) and the adjacent thick insulation board (7), the thick insulation board (7) is slidably connected to a sealing plate (13), the sealing plate (13) is fixedly connected to a rack meshing with the adjacent rotating gear (6), and a symmetrically distributed first sealing plate (14) is fixedly connected to one side of the bottom shell (1) close to the adjacent ventilation opening, the first sealing plate (14) is sealingly matched with the adjacent thick insulation board (7).

3. The lithium battery pack for industrial and commercial energy storage with low temperature resistance according to claim 2 is characterized in that: The width of the thick insulation board (7) is smaller than the width of the battery inner core (4), and the upper and lower ends of the middle insulation board (9) are both arranged as inclined surfaces parallel to each other.

4. The lithium battery pack for industrial and commercial energy storage with low temperature resistance according to claim 3 is characterized in that: The bottom shell (1) is fixedly connected to a plurality of air guide plates (18), the air guide plates (18) are fixedly connected to the battery inner core (4), the air guide shell (3) is provided with evenly distributed air inlets (301), the top shell (2) is provided with evenly distributed air guide surfaces (201), the air guide surfaces (201) correspond one-to-one to the air inlets (301), and the air inlets (301) are located between two adjacent air guide plates (18).

5. The lithium battery pack for industrial and commercial energy storage with low temperature resistance according to claim 4 is characterized in that: The sealing component comprises symmetrically distributed sealing plates (25), and the symmetrically distributed sealing plates (25) are all slidably connected to the guide shell (3) near the adjacent air inlet (301), a fourth elastic member (26) is fixedly connected between one of the sealing plates (25) and the guide shell (3), and the sealing plate (25) is extruded and matched with the adjacent second sliding rod (23), the guide shell (3) is fixedly connected to a plurality of groups of fixed gears (27), each group comprising symmetrically distributed fixed gears (27), and the sealing plate (25) is fixedly connected to a rack meshing with the adjacent fixed gear (27).

6. The lithium battery pack for industrial and commercial energy storage with low temperature resistance according to claim 4 is characterized in that: A plurality of groups of evenly distributed third electric push rods (28) are fixedly connected to the lower portion of the bottom shell (1), each group comprising symmetrically distributed third electric push rods (28), and an extrusion block (29) is fixedly connected to the telescopic end of the third electric push rod (28), and the extrusion block (29) is extruded and matched with the adjacent telescopic frame (8).

7. The lithium battery pack for industrial and commercial energy storage with low temperature resistance according to claim 5 is characterized in that: The invention also comprises a vacuum mechanism for extracting air between the top shell (2) and the guide shell (3), the vacuum mechanism being arranged on the lower side of the top shell (2), the vacuum mechanism comprising an electric slide rail (30), the electric slide rail (30) being fixedly connected to the upper side of the top shell (2), the electric slide rail (30) being slidably connected to a heat-insulating sealing block (31), the top shell (2) and the guide shell (3) both being sealedly matched with the heat-insulating sealing block (31), and the top shell (2) being provided with a one-way air extraction valve (32).

8. The lithium battery pack for industrial and commercial energy storage with low temperature resistance according to claim 7 is characterized in that: The lower side of the top shell (2) is fixedly connected with evenly distributed high-pressure injection shells (33).

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