Lithium battery high-temperature protection structure and lithium battery

Abstract

The invention relates to a lithium battery high-temperature protection structure and a lithium battery, and belongs to the technical field of lithium batteries, the lithium battery high-temperature protection structure comprises a box body, a cooling assembly capable of continuously and effectively cooling the lithium battery is arranged on the inner side of the box body, buffer assemblies are arranged at the top and the bottom of the box body, and a plurality of partition plates are fixed in an inner cavity of the box body; an inner cavity of the box body is fixedly connected with a plurality of battery main bodies, the plurality of partition plates and the plurality of battery main bodies are integrally and alternately arranged, safety assemblies are arranged on the left side and the right side of the inner cavity of the box body, a circulation hole communicated with the cooling assembly is formed in each partition plate, and a driving cavity located on the rear side of the inner cavity of the box body is formed in the box body; a flow control mechanism capable of controlling the flow of the cooling liquid is arranged in the driving cavity and extends into the cooling assembly. According to the lithium battery high-temperature protection structure and the lithium battery, efficient heat dissipation is performed on the lithium battery in cooperation with the cooling assembly and the flow control mechanism, so that the probability of explosion is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and specifically to a high-temperature protection structure for lithium batteries and a lithium battery. Background Art

[0002] With the continuous progress of technology, lithium batteries have been widely used in the fields of portable electronic devices, electric vehicles, energy storage systems, etc. due to their advantages such as high energy density, long cycle life, and no memory effect. Lithium batteries are relatively sensitive to temperature, so a high-temperature protection structure for lithium batteries is required to effectively protect the lithium batteries.

[0003] For example, a Chinese patent (publication number: CN115084719A) discloses a high-temperature protection structure for lithium batteries and a lithium battery, which includes a heat conduction module and several groups of lithium battery packs arranged in a rectangular array on the heat conduction module, and also includes several cooling mechanisms and a circulating water supply mechanism. The cooling mechanism includes a cooling box body and two heat exchange components. There are two partition plates in the cooling box body, and the two partition plates form a water passing cavity and two heat exchange cavities inside the cooling box body. The water passing cavity is located between the two heat exchange cavities, and the two heat exchange components are respectively in the two heat exchange cavities. An inlet joint and an outlet joint communicating with the inside thereof are respectively provided at both ends of the water passing cavity. Through the cooling mechanism, the flow rate of the coolant can be accelerated to quickly dissipate heat, thereby improving the heat dissipation efficiency and the service life of the lithium battery body. At the same time, the setting of the heat exchange components can accelerate the air flow around the lithium battery packs and perform heat exchange and cooling treatment on the heat generated by the lithium battery packs, improving the safe use performance of the lithium batteries.

[0004] However, the safety of this device is not high enough. When a battery fails, a large amount of heat will be generated in a short time. If the heat cannot be quickly discharged, an explosion may occur. And this device does not have an explosion-proof structure. When the lithium battery explodes, it may affect the safety of the user. Therefore, a high-temperature protection structure for lithium batteries and a lithium battery are proposed to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-temperature protection structure for lithium batteries and a lithium battery, which have the advantages of high safety and solve the problem of insufficient safety of the high-temperature protection structure.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-temperature protection structure for a lithium battery and a lithium battery, including a box body. Inside the box body, there is a cooling component that can continuously and effectively cool the lithium battery. At the top and bottom of the box body, there are buffer components that can effectively buffer external impacts. A plurality of partitions are fixed inside the box body, and a plurality of battery bodies are fixedly connected inside the box body. The plurality of partitions and the plurality of battery bodies are arranged alternately as a whole. On both the left and right sides of the inner cavity of the box body, there are insurance components that penetrate the side wall of the box body and can effectively improve the overall safety. A communication hole connected to the cooling component is opened in each partition. A drive cavity is opened in the box body at the rear side of its inner cavity. Inside the drive cavity, there is a flow control mechanism that can control the flow rate of the coolant, and the flow control mechanism extends into the cooling component.

[0007] Further, the cooling component includes a liquid inlet channel opened in the top wall of the box body and penetrating the right side wall of the box body. A liquid outlet channel penetrating the left side wall of the box body is opened in the bottom wall of the box body. The left side wall and the right side wall of the box body are respectively fixed with a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are respectively connected to the liquid inlet channel and the liquid outlet channel.

[0008] Further, the liquid inlet channel and the liquid outlet channel are connected to a plurality of communication holes, and a plurality of ventilation holes penetrating the partition are opened on the partition.

[0009] Further, two buffer grooves are opened at both the top and bottom of the box body. Each buffer component includes a plurality of buffer rods fixed to the buffer groove. On the side of the plurality of buffer rods away from the buffer groove, a buffer plate is fixed, and the plurality of buffer rods are all bent.

[0010] Further, each insurance component includes a butting plate. Two friction grooves are opened on both the inner top wall and the inner bottom wall of the box body. Friction strips are fixed to both the top and bottom of the butting plate. Each friction strip extends into the friction groove and is movably connected to the friction groove. A plurality of spring grooves are opened on both the left and right side walls of the inner cavity of the box body. On the side of the butting plate close to the side wall of the box body, there are a plurality of top support parts that respectively extend into the plurality of spring grooves. A plurality of heat dissipation channels penetrating the side wall of the box body are opened on the left and right side walls of the box body. On the side of the butting plate close to the side wall of the box body, a plurality of blocking rods that respectively extend into the plurality of heat dissipation channels are fixed. The plurality of blocking rods and the plurality of top support parts are arranged alternately as a whole. A plurality of energy absorption holes are opened on both the left and right side walls of the box body. The top and bottom of each energy absorption hole are connected to the heat dissipation channel, and an energy absorption part is provided in each energy absorption hole.

[0011] Further, each of the top support portions includes a top support rod fixed to the abutting plate. The plurality of top support rods respectively extend into a plurality of spring grooves. At one end of each top support rod away from the abutting plate and located within the spring groove, a compression spring is fixed. The side of the compression spring away from the top support rod is fixed to the inner side wall of the spring groove.

[0012] Further, each of the energy absorption portions includes a stabilizing platform fixed to the inner side wall of the energy absorption hole. At the top and bottom of each stabilizing platform, energy absorption springs are fixed. On the opposite sides of the two energy absorption springs, connecting plates are fixed.

[0013] Further, the flow control mechanism includes a driving motor fixed to the rear inner wall of the driving cavity. The output shaft of the driving motor is fixed with a threaded rod. The right side of the threaded rod is rotatably connected to the right inner wall of the driving cavity through a bearing. An adjusting rod is threadedly connected to the outer surface of the threaded rod. At the top and bottom of the adjusting rod, racks are fixed. Between the left and right inner walls of the driving cavity, two limiting rods are fixed respectively on the upper and lower sides of the driving motor. The two limiting rods respectively penetrate through the two racks. The rear inner wall of the driving cavity is rotatably connected with a plurality of transmission rods through bearings. On the outer surface of each transmission rod, a transmission gear is fixed. The plurality of transmission gears are respectively engaged with the two racks. A plurality of transmission holes are formed in the box body. The front and rear ends of each transmission hole are respectively communicated with the cooling assembly and the driving cavity. The plurality of transmission rods respectively extend into the plurality of transmission holes. Above each transmission rod and within the transmission hole, a control portion is provided. At the bottom of each control portion, a generator is fixed. The input rod of the generator is fixed to the top of the transmission rod. At the top of each control portion, an adjusting rod extending into the cooling assembly is fixed. On the outer surface of each adjusting rod and within the cooling assembly, an adjusting blade is fixed.

[0014] Further, each of the control portions includes a control rod. A sealing bearing is fixed to the outer surface of the control rod. The control rod is rotatably connected to the transmission hole through the sealing bearing. On the outer surface of the control rod and near the transmission rod, a plurality of clamping blocks are fixed. The transmission rod is clamped with a connecting cylinder through the plurality of clamping blocks. A locking airbag is fixed to the outer side of the connecting cylinder. A stabilizing cylinder located outside the locking airbag is fixed to the inner side wall of the transmission hole. On the outer surface of the connecting cylinder and below the locking airbag, an extension cylinder extending outside the transmission rod is fixed. A transmission airbag is fixed to the inner side of the extension cylinder. A gas pump is fixed to the left side of the connecting cylinder. The top and bottom of the gas pump are respectively fixed to the locking airbag and the transmission airbag. A transmission cylinder is engaged with the outer surface of the transmission rod. The transmission cylinder extends into the inner side of the transmission airbag.

[0015] A lithium battery includes the above-mentioned high-temperature protection structure for a lithium battery.

[0016] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0017] 1. For the lithium battery high-temperature protection structure and the lithium battery, when the lithium battery fails, a large amount of heat will be released. At this time, the heat will cause internal expansion, thereby squeezing the two insurance components. During the outward movement of the two insurance components, the blocking rod will also move accordingly. At this time, the gap between the blocking rod and the heat dissipation channel will become larger, allowing more heat to pass through, effectively guiding the heat, and cooperating with the cooling component and the flow control mechanism to efficiently dissipate the heat of the lithium battery, thereby reducing the probability of explosion.

[0018] 2. For the lithium battery high-temperature protection structure and the lithium battery, when too much heat is generated and explosion is inevitable, the hot air will push the abutting plate to move further, prompting the blocking rod to move further, thereby blocking the heat dissipation channel. At this time, the explosion impact force will be absorbed by the top support part and the energy absorption part, and the collapse of the liquid inlet channel, the liquid outlet channel and the flow holes will further absorb the impact force, and the explosion impact can be absorbed to the greatest extent, effectively protecting the external safety.

[0019] 3. For the lithium battery high-temperature protection structure and the lithium battery, the flow control mechanism can control the flow rate of the cooling component. When the flow control mechanism completely blocks the cooling component, the internal coolant cannot flow, which can achieve a good heat preservation effect. And the flow control mechanism can separately control the flow rate flowing into multiple flow holes, achieving a good cooling effect and realizing targeted cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is of the present invention Figure 1 an enlarged view of part A in;

[0022] Figure 3 is a schematic structural diagram of the flow control mechanism of the present invention;

[0023] Figure 4 is a schematic structural diagram of the control part of the present invention;

[0024] Figure 5 is of the present invention Figure 4 an enlarged view of part B in;

[0025] Figure 6 is a three-dimensional external view of the connection relationship between the connecting rod and the rack of the present invention;

[0026] Figure 7 is of the present invention Figure 1 an enlarged view of part C in.

[0027] In the figure: 1 box body, 2 cooling assembly, 201 liquid inlet channel, 202 liquid outlet channel, 203 liquid inlet pipe, 204 liquid outlet pipe, 3 buffer assembly, 301 buffer rod, 302 buffer plate, 4 partition board, 5 insurance assembly, 501 abutting plate, 502 top support part, 5021 top support rod, 5022 compression spring, 503 blocking rod, 504 heat dissipation channel, 505 friction strip, 506 energy absorption part, 5061 stable platform, 5062 energy absorption spring, 5063 connecting plate, 6 circulation hole, 7 battery body, 8 flow control mechanism, 801 driving motor, 802 threaded rod, 803 connecting rod, 804 rack, 805 transmission rod, 806 transmission gear, 807 control part, 8071 control rod, 8072 clamping block, 8073 connecting cylinder, 8074 locking airbag, 8075 air pump, 8076 stable cylinder, 8077 extension cylinder, 8078 transmission airbag, 808 generator, 809 adjusting rod, 810 transmission hole. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 to 2 , a lithium battery high-temperature protection structure and a lithium battery in this embodiment include a box body 1. Inside the box body 1, there is a cooling assembly 2 that can continuously and effectively cool the lithium battery. Buffer assemblies 3 for effectively buffering external impacts are provided at both the top and bottom of the box body 1. A plurality of partition boards 4 are fixed in the inner cavity of the box body 1. The partition boards 4 serve the purpose of separating the battery bodies 7. The partition boards 4 are made of raw materials with good heat conduction effects and have good heat conduction effects. A plurality of battery bodies 7 are fixedly connected in the inner cavity of the box body 1. The plurality of partition boards 4 and the plurality of battery bodies 7 are arranged alternately as a whole. Insurance assemblies 5 that penetrate the side walls of the box body 1 and can effectively improve the overall safety are provided on both the left and right sides of the inner cavity of the box body 1. A circulation hole 6 communicating with the cooling assembly 2 is opened in each partition board 4. A driving cavity is opened in the box body 1 at the rear side of its inner cavity. The driving cavity is used to provide necessary space for the flow control mechanism 8. A flow control mechanism 8 that can control the flow rate of the coolant is provided in the driving cavity. The flow control mechanism 8 extends into the cooling assembly 2.

[0030] It can be understood that the cooling component 2 includes a liquid inlet channel 201 opened in the top wall of the box body 1 and penetrating through the right side wall of the box body 1. A liquid outlet channel 202 penetrating through the left side wall of the box body 1 is opened in the bottom wall of the box body 1. The liquid inlet channel 201 and the liquid outlet channel 202 are used to ensure the smooth passage of the coolant. An inlet pipe 203 and an outlet pipe 204 are respectively fixed to the left side wall and the right side wall of the box body 1. The inlet pipe 203 and the outlet pipe 204 are respectively communicated with the liquid inlet channel 201 and the liquid outlet channel 202. One end of the inlet pipe 203 away from the box body 1 is fixedly communicated with a condenser, and the other end of the condenser is fixedly communicated with a liquid tank. One end of the outlet pipe 204 away from the box body 1 is fixedly communicated with the liquid tank.

[0031] In addition, the liquid inlet channel 201 and the liquid outlet channel 202 are communicated with a plurality of flow holes 6. The flow holes 6 can allow the coolant to flow through, improving the heat dissipation effect. A plurality of ventilation holes penetrating through the partition plate 4 are opened in the partition plate 4. The ventilation holes are located behind the flow holes 6, and there is no communication relationship between them. Therefore, the liquid in the flow holes 6 will not flow out through the air holes. The ventilation holes are used for air circulation, so as to achieve the effect of balancing the temperatures between multiple battery bodies 7.

[0032] In addition, two buffer grooves are opened at the top and bottom of the box body 1 respectively. Each buffer component 3 includes a plurality of buffer rods 301 fixed to the buffer grooves. A buffer plate 302 is fixed to one side of the plurality of buffer rods 301 away from the buffer grooves. The plurality of buffer rods 301 are all bent. The buffer rods 301 arranged in a bent shape, when encountering an external impact force, the impact force is transmitted to the plurality of buffer rods 301 through the buffer plate 302, prompting the plurality of buffer rods 301 to collapse and deform, so as to effectively absorb the impact force.

[0033] It should be further noted that each insurance component 5 includes an abutting plate 501. Two friction grooves are provided on the inner top wall and the inner bottom wall of the box body 1. Friction strips 505 are fixed to both the top and the bottom of the abutting plate 501. There is a relatively large frictional force between the friction strips 505 and the friction grooves, which can provide a certain resistance to prevent multiple compression springs 5022 from shaking back and forth, ensuring that the abutting plate 501 effectively abuts against the battery body 7. Each friction strip 505 extends into the friction groove and is movably connected to the friction groove. A plurality of spring grooves are provided on the left and right side walls of the inner cavity of the box body 1. One side of the abutting plate 501 close to the side wall of the box body 1 is provided with a plurality of top support parts 502 respectively extending into the plurality of spring grooves. The spring grooves can provide necessary support force for the top support parts 502. A plurality of heat dissipation channels 504 penetrating the side walls of the box body 1 are provided on the left and right side walls of the box body 1. The heat dissipation channels 504 are communicated with the outside, which can play a heat dissipation effect. A plurality of blocking rods 503 respectively extending into the plurality of heat dissipation channels 504 are fixed to one side of the abutting plate 501 close to the side wall of the box body 1. The arrangement of the blocking rods 503 can effectively improve the overall safety. When the impact force is too strong, the heat dissipation channels 504 can be blocked in time. The plurality of blocking rods 503 and the plurality of top support parts 502 are arranged alternately as a whole. A plurality of energy absorption holes are provided on the left and right side walls of the box body 1. The top and the bottom of each energy absorption hole are communicated with the heat dissipation channels 504. An energy absorption part 506 is provided in each energy absorption hole. After the blocking is completed, the energy absorption part 506 can effectively absorb the internal impact force.

[0034] Furthermore, each top support part 502 includes a top support rod 5021 fixed to the abutting plate 501. The plurality of top support rods 5021 respectively extend into the plurality of spring grooves. A compression spring 5022 is fixed to the end of each top support rod 5021 far from the abutting plate 501 and located in the spring groove. The elastic force of the compression spring 5022 can ensure that the top support rod 5021 continuously provides pressure to the abutting plate 501, prompting the abutting plate 501 to continuously abut against the battery body 7, thereby improving the heat dissipation effect. The side of the compression spring 5022 far from the top support rod 5021 is fixed to the inner side wall of the spring groove.

[0035] It can be known that each energy absorption part 506 includes a stabilizing platform 5061 fixed to the inner side wall of the energy absorption hole. Energy absorption springs 5062 are fixed to both the top and the bottom of each stabilizing platform 5061. Connecting plates 5063 are fixed to the opposite sides of the two energy absorption springs 5062. When the impact force comes, the impact force prompts the connecting plate 5063 to move, thereby compressing the energy absorption springs 5062 and converting the impact force into the elastic potential energy of the energy absorption springs 5062.

[0036] In this embodiment, after the impact ends, the energy absorption springs 5062 release the elastic potential energy, prompting the connecting plate 5063 to shake back and forth. This protection structure has a good temperature control effect, high overall safety, and is safe and stable in use.

[0037] Please refer to again Figure 1 and Figures 3 to 7 To achieve flow control, the flow control mechanism 8 in this embodiment includes a drive motor 801 fixed to the inner rear wall of the drive cavity. The drive motor 801 is used to provide power for the entire flow control mechanism 8. A threaded rod 802 is fixed to the output shaft of the drive motor 801. The right side of the threaded rod 802 is rotatably connected to the right inner wall of the drive cavity through a bearing. A connecting rod 803 is threadedly connected to the outer surface of the threaded rod 802. The rack 804 is limited by a limiting rod, so that the connecting rod 803 can be effectively limited. Then, through the threaded connection of the threaded rod 802 to provide power, the connecting rod 803 is urged to move, driving the rack 804 to move. Racks 804 are fixed to both the top and bottom of the connecting rod 803. Two limiting rods are fixed between the left and right inner walls of the drive cavity, respectively located on the upper and lower sides of the drive motor 801. The two limiting rods respectively penetrate through the two racks 804. A plurality of transmission rods 805 are rotatably connected to the inner rear wall of the drive cavity through bearings. A transmission gear 806 is fixed to the outer surface of each transmission rod 805. The plurality of transmission gears 806 are respectively engaged with the two racks 804. The movement of the rack 804 can drive the plurality of transmission gears 806 to rotate simultaneously. A plurality of transmission holes 810 are formed in the box body 1. The front and rear ends of each transmission hole 810 are respectively communicated with the cooling component 2 and the drive cavity. The plurality of transmission rods 805 respectively extend into the plurality of transmission holes 810. A control part 807 is provided above each transmission rod 805 and within the transmission hole 810. The control part 807 can control the power transmission on the transmission rod 805, thereby controlling the rotation of the adjusting rod 809. When the control part 807 is in a connected state, the power of the transmission rod 805 can be smoothly transmitted to the adjusting rod 809, thereby achieving flow control. When the control part 807 is disconnected, the adjusting rod 809 can be locked to ensure stable flow. A generator 808 is fixed to the bottom of each control part 807. The input rod of the generator 808 is fixed to the top of the transmission rod 805. An adjusting rod 809 extending into the cooling component 2 is fixed to the top of each control part 807. Adjusting vanes are fixed to the outer surface of each adjusting rod 809 and within the cooling component 2. The flow rate of the coolant can be controlled by rotating the adjusting vanes.

[0038] In addition, each control unit 807 includes a control rod 8071. A sealed bearing is fixed on the outer surface of the control rod 8071. The sealed bearing has good sealing performance, which can ensure that the coolant will not flow along the control rod 8071 into the transmission hole 810, guaranteeing the stability of the overall operation of the control unit 807. The control rod 8071 is rotatably connected to the transmission hole 810 through the sealed bearing. On the outer surface of the control rod 8071 and on the side close to the transmission rod 805, a plurality of clamping blocks 8072 are fixed. The transmission rod 805 is clamped with a connecting cylinder 8073 through the plurality of clamping blocks 8072. A locking airbag 8074 is fixed on the outer side of the connecting cylinder 8073. When the locking airbag 8074 is inflated, the locking airbag 8074 tightly abuts against the stabilizing cylinder 8076. Since the stabilizing cylinder 8076 is a fixed structure, the connecting cylinder 8073 can be successfully locked at this time, thereby improving the stability of the adjusting rod 809. A stabilizing cylinder 8076 located outside the locking airbag 8074 is fixed on the inner side wall of the transmission hole 810. An extension cylinder 8077 extending to the outside of the transmission rod 805 is fixed on the outer surface of the connecting cylinder 8073 and below the locking airbag 8074. A transmission airbag 8078 is fixed inside the extension cylinder 8077. An air pump 8075 is fixed on the left side of the connecting cylinder 8073. The top and bottom of the air pump 8075 are respectively fixed to the locking airbag 8074 and the transmission airbag 8078. A transmission cylinder is engaged with the outer surface of the transmission rod 805, and the transmission cylinder extends into the transmission airbag 8078. When the transmission airbag 8078 is inflated, the transmission airbag 8078 will tightly abut against both the connecting cylinder 8073 and the transmission cylinder at the same time, thereby ensuring the smooth transmission of power.

[0039] In addition, a lithium battery includes the above-mentioned high-temperature protection structure for a lithium battery.

[0040] In this embodiment, a micro battery is fixed on the rear side of the air pump 8075, which is used to store the electric energy generated by the generator 808, thereby stably supplying energy to the air pump 8075. The adjusting rod 809 on the flow control mechanism 8 can operate simultaneously or separately, which can effectively improve the cooling effect.

[0041] It can be understood that the device can effectively control the flow rate through the cooperation of the cooling component 2 and the flow control mechanism 8, and then fully improve the safety of the device during use through the insurance component 5 and the buffer component 3, reduce the explosion probability, and can also effectively absorb the impact force during an explosion to protect the safety of external users.

[0042] The electrical components mentioned in the text are all electrically connected to the controller and the power supply. The control method of the present invention is controlled by the controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The power supply provided by the storage battery also belongs to the common knowledge in the art. And the present invention is mainly used to protect mechanical devices, so the control method and circuit connection of the present invention will not be explained in detail.

[0043] The working principle of the above embodiment is:

[0044] (1) During normal use, the air pump 8075 is first started to pump gas into the transmission airbag 8078. At this time, the transmission airbag 8078 can simultaneously connect the transmission rod 805 and the control rod 8071, and the drive motor 801 is started to drive the threaded rod 802 to rotate. Since the two limit rods will limit the rack 804, in conjunction with the threaded connection relationship, the rack 804 will move at this time, thereby driving multiple transmission gears 806 to rotate at the same time. The power is transmitted from the transmission rod 805 to the control rod 8071 through the transmission airbag 8078, driving the adjustment blades on the adjustment rod 809 to rotate, thereby achieving flow control. At this time, multiple adjustment blades can rotate at the same time, thereby adjusting the overall flow at the same time, and better controlling the temperature of the battery body 7.

[0045] (2) When the temperature of the battery body 7 rises locally, the drive motor 801 is first started to drive all the adjustment blades to rotate simultaneously, causing the flow rate to decrease. Then, the air pump 8075 located at other relatively low temperature positions is started to transfer the gas originally located in the transmission airbag 8078 to the locking airbag 8074, causing the locking airbag 8074 to expand. At this time, the inside and outside of the locking airbag 8074 are tightly abutted against the connecting tube 8073 and the stabilizing tube 8076. At this time, the adjustment rod 809 will be locked, and the transmission rod 805 and the adjustment rod 809 are disconnected, so that power cannot be transmitted. The transmission rod 805 and the adjustment rod 809 located at the position of the battery body 7 with a higher temperature remain connected. At this time, starting the drive motor 801 again can realize the rotation of the adjustment blades at that location, thereby expanding the flow at that location and achieving targeted cooling.

[0046] (3) When a battery fails, a large amount of heat will be released. At this time, the heat will cause internal expansion, thereby squeezing the two fuse components 5, causing the abutment plates 501 on the two fuse components 5 to move outward. At this time, the blocking rod 503 will also move with it. At this time, the gap between the blocking rod 503 and the heat dissipation channel 504 will become larger, which can accommodate more heat to pass through and effectively guide the heat. In conjunction with the liquid inlet channel 201, the liquid outlet channel 202 and the multiple flow holes 6, the heat can be quickly evacuated, thereby reducing the probability of explosion.

[0047] (4) When the heat generation is excessive and the explosion is inevitable, the impact force generated by the explosion will first prompt the abutting plate 501 to move. At this time, the compression spring 5022 is compressed, absorbing the impact force for the first time. At the same time, the hot air will push the abutting plate 501 to move further, prompting the blocking rod 503 to move further, thus blocking the heat dissipation channel 504. The remaining impact force will be guided to the energy absorption part 506, and through the compression deformation of the energy absorption spring 5062, the impact force is absorbed again. Finally, in cooperation with the collapse of the liquid inlet channel 201, the liquid outlet channel 202 and the flow hole 6, the impact force is further absorbed, which can absorb the explosion impact to the greatest extent, effectively protect the external safety, and effectively improve the overall safety.

[0048] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

Claims

1. A lithium battery high temperature protection structure, comprising a box (1), characterized in that: The inner side of the box (1) is provided with a cooling assembly (2) capable of continuously and effectively cooling the lithium battery. The top and bottom of the box (1) are provided with a buffer assembly (3) capable of effectively buffering external impact. The inner cavity of the box (1) is fixed with a plurality of partitions (4). The inner cavity of the box (1) is fixedly connected with a plurality of battery bodies (7). The plurality of partitions (4) and the plurality of battery bodies (7) are arranged alternately as a whole. The left and right sides of the inner cavity of the box (1) are provided with a safety assembly (5) penetrating the side wall of the box (1) and capable of effectively improving the overall safety. Each of the partitions (4) is provided with a flow hole (6) connected to the cooling assembly (2). The box (1) is provided with a driving cavity located at the rear side of its inner cavity. The driving cavity is provided with a flow control mechanism (8) capable of controlling the flow of coolant. The flow control mechanism (8) extends into the cooling assembly (2).

2. A lithium battery high temperature protection structure according to claim 1, characterized in that: The cooling assembly (2) comprises a liquid inlet channel (201) opened in the top wall of the box body (1) and penetrating the right side wall of the box body (1); a liquid outlet channel (202) penetrating the left side wall of the box body (1) is opened in the bottom wall of the box body (1); a liquid inlet pipe (203) and a liquid outlet pipe (204) are respectively fixed to the left side wall and the right side wall of the box body (1); the liquid inlet pipe (203) and the liquid outlet pipe (204) are respectively connected to the liquid inlet channel (201) and the liquid outlet channel (202).

3. A lithium battery high temperature protection structure according to claim 2, characterized in that: The liquid inlet channel (201) and the liquid outlet channel (202) are in communication with a plurality of flow holes (6), and the partition plate (4) is provided with a plurality of ventilation holes penetrating the partition plate (4).

4. A lithium battery high temperature protection structure according to claim 1, characterized in that: The top and bottom of the box body (1) are each provided with two buffer grooves, each of the buffer components (3) comprises a plurality of buffer rods (301) fixed to the buffer grooves, a buffer plate (302) is fixed to one side of the plurality of buffer rods (301) away from the buffer grooves, and the plurality of buffer rods (301) are all in a bent shape.

5. A lithium battery high temperature protection structure according to claim 1, characterized in that: Each of the safety components (5) comprises an abutment plate (501), the inner top wall and the inner bottom wall of the box body (1) are each provided with two friction grooves, the top and bottom of the abutment plate (501) are each fixed with a friction strip (505), each of the friction strips (505) extends into the friction groove and is movably connected to the friction groove, a plurality of spring grooves are each provided on the left and right side walls of the inner cavity of the box body (1), a plurality of top support portions (502) are respectively provided on the side of the abutment plate (501) close to the side wall of the box body (1), and the box body (1) is provided with a plurality of spring grooves. ) are provided with a plurality of heat dissipation channels (504) penetrating the side wall of the box body (1); a plurality of blocking rods (503) respectively extending into the plurality of heat dissipation channels (504) are fixed on one side of the abutment plate (501) close to the side wall of the box body (1); the plurality of blocking rods (503) and the plurality of top support portions (502) are arranged alternately as a whole; a plurality of energy absorption holes are provided on the left and right side walls of the box body (1); the top and the bottom of each energy absorption hole are connected to the heat dissipation channel (504); and an energy absorption portion (506) is provided in each energy absorption hole.

6. A lithium battery high temperature protection structure according to claim 5, characterized in that: Each of the top support parts (502) comprises a top support rod (5021) fixed to the abutment plate (501), and the multiple top support rods (5021) extend into multiple spring grooves respectively. A compression spring (5022) is fixed at one end of each of the top support rods (5021) away from the abutment plate (501) and located in the spring groove, and the side of the compression spring (5022) away from the top support rod (5021) is fixed to the inner wall of the spring groove.

7. A lithium battery high temperature protection structure according to claim 5, characterized in that: Each of the energy absorbing parts (506) comprises a stabilizing platform (5061) fixed to the inner wall of the energy absorbing hole, and energy absorbing springs (5062) are fixed to the top and bottom of each of the stabilizing platforms (5061), and connecting plates (5063) are fixed to the opposite sides of the two energy absorbing springs (5062).

8. A lithium battery high temperature protection structure according to claim 1, characterized in that: The flow control mechanism (8) comprises a driving motor (801) fixed to the rear wall of the driving chamber, a threaded rod (802) being fixed to the output shaft of the driving motor (801), the right side of the threaded rod (802) being rotatably connected to the right wall of the driving chamber via a bearing, a connecting rod (803) being threadedly connected to the outer surface of the threaded rod (802), a rack (804) being fixed to the top and bottom of the connecting rod (803), two limit rods being respectively located on the upper and lower sides of the driving motor (801) being fixed between the left and right inner walls of the driving chamber, the two limit rods respectively passing through the two racks (804), a plurality of transmission rods (805) being rotatably connected to the inner rear wall of the driving chamber via bearings, a transmission gear (806) being fixed to the outer surface of each transmission rod (805), and the plurality of transmission gears (806) being connected to the inner rear wall of the driving chamber. ) are respectively meshed with two racks (804), a plurality of transmission holes (810) are opened in the housing (1), the front and rear ends of each transmission hole (810) are respectively connected to the cooling assembly (2) and the driving chamber, a plurality of transmission rods (805) extend into the plurality of transmission holes (810), a control unit (807) is provided above each transmission rod (805) and located in the transmission hole (810), a generator (808) is fixed at the bottom of each control unit (807), an input rod of the generator (808) is fixed to the top of the transmission rod (805), an adjustment rod (809) extending into the cooling assembly (2) is fixed at the top of each control unit (807), and an adjustment blade is fixed on the outer surface of each adjustment rod (809) and located in the cooling assembly (2).

9. A lithium battery high temperature protection structure according to claim 8, characterized in that: Each of the control parts (807) comprises a control rod (8071), a sealed bearing is fixed on the outer surface of the control rod (8071), the control rod (8071) is rotatably connected to the transmission hole (810) via the sealed bearing, a plurality of clamping blocks (8072) are fixed on the outer surface of the control rod (8071) and on a side close to the transmission rod (805), the transmission rod (805) is clamped with a connecting tube (8073) via the plurality of clamping blocks (8072), a locking airbag (8074) is fixed on the outer side of the connecting tube (8073), and a locking airbag (8074) is fixed on the inner side wall of the transmission hole (810) 074), an extension tube (8077) extending to the outside of the transmission rod (805) is fixed on the outer surface of the connecting tube (8073) and located below the locking airbag (8074), a transmission airbag (8078) is fixed on the inner side of the extension tube (8077), an air pump (8075) is fixed on the left side of the connecting tube (8073), the top and bottom of the air pump (8075) are respectively fixed to the locking airbag (8074) and the transmission airbag (8078), and a transmission tube is meshed on the outer surface of the transmission rod (805), and the transmission tube extends to the inner side of the transmission airbag (8078).

10. A lithium battery, characterized in that: It comprises a lithium battery high temperature protection structure as described in any one of claims 1 to 9.

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