Lithium battery pack with high safety performance

Abstract

The invention discloses a lithium battery pack with high safety performance, and belongs to the field of lithium batteries, the lithium battery pack comprises a packaging box and a flow guide heat dissipation assembly, a sealing cover is fixedly mounted at the top of the packaging box, a plurality of lithium battery blocks are arranged in the packaging box, the flow guide heat dissipation assembly is located in the packaging box, and the sealing cover is fixedly mounted on the sealing cover. The flow guide heat dissipation assembly comprises a concave placement plate; by arranging the concave placement plate, the partition plate, the corrugated pipe, the flow guide pipe, the circulation cavity and the ventilation assembly, a heat exchange and flowing channel can be formed in the packaging box, so that external low-temperature air can flow into the packaging box, and the surface of the lithium battery block is cooled; meanwhile, the flowing speed of hot air in the circulating cavity can be increased, so that the hot air can be quickly discharged, the lithium battery blocks can be conveniently and timely cooled, the problem that the lithium battery blocks are damaged and exploded due to too high temperature is avoided, and the safety of the lithium battery pack during use is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium batteries, and particularly relates to a lithium battery pack with high safety performance. Background Art

[0002] A lithium battery is a battery with a metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. It is mainly divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium metal batteries are usually non-rechargeable and contain metallic lithium; while lithium-ion batteries do not contain metallic lithium and are rechargeable. For a lithium battery pack, it is formed by connecting and encapsulating multiple lithium batteries together. Since multiple lithium batteries inside it are encapsulated in a relatively closed environment, and lithium batteries generate heat during operation, heat dissipation treatment is required for it; However, there are generally two heat dissipation methods adopted by most existing lithium battery packs: one is to use a material with good heat conduction to transfer the heat on the surface of the lithium battery away. In this way, the heat transfer and diffusion speed is slow, it is difficult to quickly transport the heat away, and it is easy for the lithium battery to be damaged due to untimely heat conduction, and even explode due to excessive heat accumulation; the other is to use a motor to drive the fan blade to rotate to cool the lithium battery. This method requires an additional power source for the fan blade, and the installation method of the motor and subsequent maintenance also need to be considered. Therefore, we propose a lithium battery pack with high safety performance. Summary of the Invention

[0003] The purpose of the present invention is to provide a lithium battery pack with high safety performance to solve the problems mentioned in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A lithium battery pack with high safety performance, the lithium battery pack includes: An encapsulation box, a sealing cover is fixedly installed on the top of the encapsulation box, and a plurality of lithium battery blocks are arranged inside the encapsulation box; A diversion heat dissipation component, the diversion heat dissipation component is located inside the encapsulation box, and the diversion heat dissipation component includes a concave placement plate, a partition is fixedly connected to the bottom of the inner cavity of the concave placement plate, a heat conduction block is fixedly connected to the side of the partition, a corrugated pipe is fixedly connected to the top of the concave placement plate, and the top of the corrugated pipe is fixedly connected to a diversion pipe. The concave placement plate, the corrugated pipe and the diversion pipe are interconnected; An endothermic bladder, the endothermic bladder is fixedly connected to the bottom of the concave placement plate, and an intelligent control component is arranged at the bottom of the endothermic bladder; A ventilation component, the ventilation component is connected to the concave placement plate, and the ventilation component is electrically connected to the intelligent control component.

[0005] As a preferred embodiment, a conductive column is fixedly sleeved on the top of the sealing cover, and the bottom end of the conductive column is fixedly connected to the top of the lithium battery block through a conductive wire.

[0006] As a preferred embodiment, the top of the inner cavity of the concave placement plate is in contact with the bottom of the lithium battery block, and a circulation cavity is formed inside the concave placement plate, and a partition block is fixedly connected inside the circulation cavity.

[0007] As a preferred embodiment, through holes are formed in the side surface of the partition plate, the heat conducting block is made of silica gel material, and the heat conducting block is in contact with the side surface of the lithium battery block.

[0008] As a preferred embodiment, the top end of the corrugated pipe is fixedly connected with a mounting sleeve, the mounting sleeve and the diversion pipe are fixedly connected by bolts, and air outlet holes are formed in the bottom of the diversion pipe.

[0009] As a preferred embodiment, the heat absorption capsule bag is made of an elastic material, and a heat absorption medium is filled inside the heat absorption capsule bag.

[0010] As a preferred embodiment, the intelligent control component includes a pressure induction probe and a controller. The pressure induction probe is fixedly connected to the bottom of the inner cavity of the packaging box, and the top of the pressure induction probe is in contact with the bottom of the heat absorption capsule bag. The controller includes a signal receiving module, a signal processing module, a numerical setting module and a circuit control module. The input end of the signal receiving module is signal-connected to the output end of the pressure induction probe, and the output end of the signal receiving module is signal-connected to the input end of the signal processing module. The output end of the signal processing module is signal-connected to the input end of the numerical setting module. The output end of the numerical setting module is signal-connected to the input end of the circuit control module. The output end of the circuit control module is electrically connected to the input end of the air exchange component.

[0011] As a preferred embodiment, the air exchange component includes a housing. The housing is fixedly installed on the side surface of the packaging box, and a dust-proof net is fixedly connected to one side of the housing. A baffle is fixedly connected inside the housing, and an air inlet pipe and an exhaust pipe are arranged inside the housing. An air inlet valve and an exhaust valve are respectively fixedly installed on the outer parts of the air inlet pipe and the exhaust pipe, and one ends of the air inlet pipe and the exhaust pipe respectively extend into the inner part of the concave placement plate.

[0012] As a preferred embodiment, a drying plate is fixedly installed on the inner side of the housing. The drying plate is located on one side of the air inlet pipe, and both the air inlet valve and the exhaust valve are one-way solenoid valves.

[0013] As a preferred embodiment, the lithium battery pack further includes a cooling component, which includes a diversion block and a branch pipe. The diversion block is fixedly connected inside the diversion pipe. The branch pipe is fixedly sleeved at the bottom of the diversion pipe, and a spiral pipe is fixedly sleeved outside the branch pipe. One end of the spiral pipe is inserted into the inside of the branch pipe, and exhaust holes are formed on the outside of the spiral pipe. A fan blade is movably sleeved outside the bottom end of the branch pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: For the lithium battery pack with high safety performance, by setting the concave placement plate, partition plate, corrugated pipe, diversion pipe, flow cavity and ventilation component, a heat exchange and flow channel can be formed inside the packaging box during the use of the lithium battery pack, enabling the low-temperature air from the outside to flow into the inside of the packaging box and cool the surface of the lithium battery block. At the same time, it can also promote the flow rate of the hot air in the flow cavity, enabling the hot air to be quickly discharged, facilitating timely heat dissipation and cooling of the lithium battery block, avoiding the problem of damage and explosion of the lithium battery block due to excessive temperature, and thus improving the safety during the use of the lithium battery pack. For the lithium battery pack with high safety performance, by setting the concave placement plate, partition plate and heat conduction block, it is convenient to absorb the heat generated by the lithium battery block by using the heat conduction characteristics of its own materials during the use of the lithium battery pack, which can cool the surface of the lithium battery block. At the same time, the cooperation of the concave placement plate and the partition plate can separate and place multiple lithium battery blocks. The heat conduction block made of silica gel material can squeeze and fix the lithium battery block by using its elastic performance while absorbing heat, thus improving the placement stability of the lithium battery block. For the lithium battery pack with high safety performance, by setting the heat absorption sachet, it is convenient to absorb heat by using the heat absorption medium inside during the heat dissipation and cooling process of the lithium battery block, which can reduce the accumulation of heat outside the lithium battery block and play a role in dissipating heat from the lithium battery block. At the same time, the heat absorption medium after heat absorption will expand, causing the volume of the heat absorption sachet to increase and squeeze the pressure induction probe. In this way, the controller can be used to timely open the intake valve and exhaust valve, enabling the ventilation component to operate and facilitating the rapid discharge of the heat inside the packaging box, thereby improving the heat dissipation and cooling effect of the lithium battery block. For the lithium battery pack with high safety performance, by setting the cooling component, during the heat dissipation and cooling process of the lithium battery block, a flowing vortex can be formed at the top of the fan blade by the inflowing low-temperature air, which can drive the fan blade to rotate and generate wind power. This method does not require additional power supply for the fan blade and can reuse the kinetic energy of the low-temperature air flow. The generated wind power will dissipate heat from the lithium battery block below, thereby further improving the heat dissipation and cooling effect of the lithium battery block.

[0015] The lithium battery pack with high safety performance is provided with bellows, which can not only connect the concave placement plate and the diversion pipe, so that a heat exchange flow channel is formed among the concave placement plate, the bellows and the diversion pipe, but also during the process of opening the sealing cover, since the bellows can undergo telescopic deformation, the opening gap between the sealing cover and the encapsulation box can be enlarged, facilitating the disassembly and assembly operations of the bolts on the mounting sleeve, and thus facilitating the subsequent complete disassembly of the sealing cover and the encapsulation box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front schematic view of the first embodiment in the structure of the present invention; Figure 2 is a partial cross-sectional view of the first embodiment in the structure of the present invention; Figure 3 is a partial cross-sectional view of the concave placement plate in the structure of the present invention; Figure 4 is a side schematic view of the partition plate in the structure of the present invention; Figure 5 is a telecommunications connection schematic view of the intelligent control component in the structure of the present invention; Figure 6 is a partial cross-sectional view of the second embodiment in the structure of the present invention; Figure 7 In the structure of the present invention Figure 6 is an enlarged schematic view of part A.

[0017] In the figure: 1. Encapsulation box; 2. Sealing cover; 3. Lithium battery block; 4. Concave placement plate; 5. Partition plate; 6. Heat conduction block; 7. Bellows; 8. Diversion pipe; 9. Flow cavity; 10. Partition block; 11. Mounting sleeve; 12. Air outlet; 13. Heat absorption bladder; 14. Intelligent control component; 141. Pressure induction probe; 142. Controller; 142a. Signal receiving module; 142b. Signal processing module; 142c. Numerical setting module; 142d. Circuit control module; 15. Ventilation component; 151. Housing; 152. Dust-proof net; 153. Baffle; 154. Air inlet pipe; 155. Exhaust pipe; 156. Air inlet valve; 157. Exhaust valve; 16. Conductive column; 17. Conductive wire; 18. Cooling component; 181. Diversion block; 182. Branch pipe; 183. Spiral pipe; 184. Exhaust hole; 185. Fan blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the present invention in conjunction with embodiments.

[0019] The following embodiments are used to illustrate the present invention, but cannot be used to limit the protection scope of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions. Any simple improvement to the method of the present invention under the premise of the concept of the present invention belongs to the scope protected by the present invention.

[0020] Embodiment 1:

[0021] Please refer to Figures 1 - 5 , the present invention provides a lithium battery pack with high safety performance. The lithium battery pack includes a packaging box 1, a diversion and heat dissipation component, a heat absorption sachet 13, and a ventilation component 15. A sealing cover 2 is fixedly installed on the top of the packaging box 1, and a plurality of lithium battery blocks 3 are arranged inside the packaging box 1. A conductive column 16 is fixedly sleeved on the top of the sealing cover 2, and the bottom end of the conductive column 16 is fixedly connected to the top of the lithium battery block 3 through a conductive wire 17; In this embodiment, the plurality of lithium battery blocks 3 are connected to each other through wires. Through the conductive column 16 and the conductive wire 17, the electric energy stored inside the lithium battery block 3 can be released to the outside, and at the same time, the lithium battery block 3 can be charged. By using the packaging box 1 and the sealing cover 2, the lithium battery block 3 can be placed in a relatively sealed environment, avoiding the problem that the lithium battery block 3 is easily damaged due to being exposed outside, thus playing a protective role for the lithium battery block 3.

[0022] The diversion and heat dissipation component is located inside the packaging box 1, and the diversion and heat dissipation component includes a concave placement plate 4. The top of the inner cavity of the concave placement plate 4 is in contact with the bottom of the lithium battery block 3, and a circulation cavity 9 is opened inside the concave placement plate 4. A partition block 10 is fixedly connected inside the circulation cavity 9. A partition plate 5 is fixedly connected to the bottom of the inner cavity of the concave placement plate 4. A heat conduction block 6 is fixedly connected to the side of the partition plate 5. A through hole is opened on the side of the partition plate 5. The material of the heat conduction block 6 is a silica gel material, and the heat conduction block 6 is in contact with the side of the lithium battery block 3. A bellows 7 is fixedly connected to the top of the concave placement plate 4. The top end of the bellows 7 is fixedly connected to a diversion pipe 8. The concave placement plate 4, the bellows 7, and the diversion pipe 8 are interconnected with each other. The top end of the bellows 7 is fixedly connected to a mounting sleeve 11. The mounting sleeve 11 and the diversion pipe 8 are fixed by bolts. An air outlet hole 12 is opened at the bottom of the diversion pipe 8; In this embodiment, the concave placement plate 4 and the partition plate 5 can be made of materials with good heat conduction performance. When the lithium battery pack is working, the lithium battery block 3 itself generates heat. At this time, the heat conduction block 6 made of silica gel material can absorb the heat on the surface of the lithium battery block 3 and conduct the heat to the partition plate 5. The through holes formed on the surface of the partition plate 5 can enable the heat to diffuse and transfer to the inside of the partition plate 5, and these heats will flow inside the flow cavity 9, which is convenient for conducting away the heat on the surface of the lithium battery block 3, thereby facilitating the heat dissipation and temperature reduction of the lithium battery block 3. At the same time, the partition plate 5 and the concave placement plate 4 themselves can also adsorb heat, which improves the heat dissipation and temperature reduction effect of the lithium battery block 3 and avoids the problem of damage and explosion of the lithium battery block 3 due to excessive temperature, thereby improving the safety of the lithium battery pack during use; The function of the corrugated pipe 7 in this embodiment is not only to connect the concave placement plate 4 and the diversion pipe 8, so that a heat exchange flow channel is formed among the concave placement plate 4, the corrugated pipe 7 and the diversion pipe 8, but also during the opening process of the sealing cover 2, since the corrugated pipe 7 can undergo telescopic deformation, this can make the opening gap between the sealing cover 2 and the packaging box 1 larger, which is convenient for disassembling and assembling the bolts on the mounting sleeve 11, thereby facilitating the subsequent complete disassembly of the sealing cover 2 and the packaging box 1.

[0023] The heat absorption bladder 13 is fixedly connected to the bottom of the concave placement plate 4. The material of the heat absorption bladder 13 is an elastic material, and the inside of the heat absorption bladder 13 is filled with a heat absorption medium. A smart control component 14 is arranged at the bottom of the heat absorption bladder 13. The smart control component 14 includes a pressure induction probe 141 and a controller 142. The pressure induction probe 141 is fixedly connected to the bottom of the inner cavity of the packaging box 1, and the top of the pressure induction probe 141 is in contact with the bottom of the heat absorption bladder 13. The controller 142 includes a signal receiving module 142a, a signal processing module 142b, a numerical setting module 142c and a circuit control module 142d. The input end of the signal receiving module 142a is signal-connected to the output end of the pressure induction probe 141, and the output end of the signal receiving module 142a is signal-connected to the input end of the signal processing module 142b. The output end of the signal processing module 142b is signal-connected to the input end of the numerical setting module 142c. The output end of the numerical setting module 142c is signal-connected to the input end of the circuit control module 142d. The output end of the circuit control module 142d is electrically connected to the input end of the ventilation component 15; In this embodiment, the heat-absorbing medium inside the heat-absorbing bag 13 is aluminum-magnesium alloy particles. When heat flows in the flow cavity 9 inside the concave placement plate 4, since the concave placement plate 4 itself will absorb heat, and this heat will be transferred to the aluminum-magnesium alloy particles inside the heat-absorbing bag 13. At this time, the aluminum-magnesium alloy particles will absorb the heat and expand, causing the volume of the heat-absorbing bag 13 to increase. The increase in the volume of the heat-absorbing bag 13 will exert a squeezing force on the pressure sensing probe 141. In this way, the pressure sensing probe 141 will transmit the detected pressure information to the signal receiving module 142a in the form of a signal, and the signal receiving module 142a will transmit the received signal to the signal processing module 142b, and the signal processing module 142b will amplify the signal. If the pressure value detected by the pressure sensing probe 141 is greater than the pressure value set by the numerical setting module 142c, the circuit control module 142d will turn on the circuit of the ventilation component 15, so that the ventilation component 15 will operate due to being powered on, thereby quickly dissipating the heat inside the lithium battery block 3 in the packaging box 1.

[0024] The ventilation component 15 is connected to the concave placement plate 4, and the ventilation component 15 is electrically connected to the intelligent control component 14. The ventilation component 15 includes a housing 151. The housing 151 is fixedly installed on the side of the packaging box 1, and a dust-proof net 152 is fixedly connected to one side of the housing 151. A baffle 153 is fixedly connected inside the housing 151, and an air inlet pipe 154 and an exhaust pipe 155 are arranged inside the housing 151. An air inlet valve 156 and an exhaust valve 157 are respectively fixedly installed outside the air inlet pipe 154 and the exhaust pipe 155, and one ends of the air inlet pipe 154 and the exhaust pipe 155 respectively extend into the inside of the concave placement plate 4. A drying plate is fixedly installed inside the housing 151 on the side of the air inlet pipe 154. The air inlet valve 156 and the exhaust valve 157 are both one-way solenoid valves, and the input ends of the air inlet valve 156 and the exhaust valve 157 are electrically connected to the output end of the circuit control module 142d; In this embodiment, when the intake valve 156 and the exhaust valve 157 are opened due to power-on, the outside air will pass through the dust-proof net 152, pass through the drying plate, and flow into the interior of the concave placement plate 4 along the intake pipe 154. Moreover, the low-temperature outside air will enter from one end of the diversion pipe 8 along a corrugated pipe 7. A part of the low-temperature air flowing in the diversion pipe 8 flows out from the air outlet holes 12 and contacts the lithium battery block 3 below it, facilitating the cooling of the surface of the lithium battery block 3. Another part of the low-temperature air will flow out from the other end of the diversion pipe 8 and enter the flow cavity 9 of the concave placement plate 4 along another corrugated pipe 7, enabling the low-temperature air to exchange heat with the hot air flowing in the flow cavity 9. In this way, heat can be reduced. At the same time, since the concave placement plate 4, the corrugated pipe 7, and the diversion pipe 8 are interconnected, the introduced outside low-temperature air can be used to push the high-temperature hot air in the flow cavity 9, accelerating the flow rate of the high-temperature hot air, enabling the high-temperature hot air to be discharged along the exhaust pipe 155, accelerating the diffusion rate of the heat inside the packaging box 1, facilitating the rapid heat dissipation of the lithium battery block 3, and further improving the heat dissipation and cooling effect of the lithium battery block 3.

[0025] In summary, compared with most existing lithium battery packs, the lithium battery pack with high safety performance in this embodiment has the following advantages: 1. By providing the concave placement plate 4, the partition plate 5, and the heat-conducting block 6, during the use of the lithium battery pack, it is convenient to absorb the heat generated by the lithium battery block 3 by utilizing the heat conduction characteristics of its own materials, which can cool the surface of the lithium battery block 3. At the same time, the cooperation of the concave placement plate 4 and the partition plate 5 can separate and place multiple lithium battery blocks 3. The heat-conducting block 6 made of silicone material can, while absorbing heat, use its own elastic properties to squeeze and fix the lithium battery block 3, thereby improving the placement stability of the lithium battery block 3; 2. By providing the concave placement plate 4, the partition plate 5, the corrugated pipe 7, the diversion pipe 8, the flow cavity 9, and the air exchange component 15, during the use of the lithium battery pack, a heat exchange and flow channel can be formed inside the packaging box 1, enabling the outside low-temperature air to flow into the interior of the packaging box 1 and cool the surface of the lithium battery block 3. At the same time, it can also promote the flow rate of the hot air in the flow cavity 9, enabling the hot air to be quickly discharged, facilitating the timely heat dissipation and cooling of the lithium battery block 3, avoiding the problem of damage and explosion of the lithium battery block 3 due to excessive temperature, and thus improving the safety during the use of the lithium battery pack; 3. By setting up the heat-absorbing bladder 13, during the heat dissipation and cooling process of the lithium battery block 3, it is convenient to utilize the heat-absorbing medium inside it for heat absorption, which can reduce the accumulation of heat outside the lithium battery block 3, achieving a heat dissipation effect on the lithium battery block 3. At the same time, the heat-absorbing medium after heat absorption will expand, causing the volume of the heat-absorbing bladder 13 to increase and squeeze the pressure induction probe 141. In this way, the controller 142 can be used to promptly open the intake valve 156 and the exhaust valve 157, enabling the ventilation component 15 to operate and facilitating the rapid discharge of the heat inside the packaging box 1, thereby improving the heat dissipation and cooling effect of the lithium battery block 3.

[0026] Embodiment 2:

[0027] Please refer to Figure 6 and Figure 7 , on the basis of Embodiment 1, the high-safety lithium battery pack of this embodiment is increased with a cooling component 18. The cooling component 18 includes a diversion block 181 and a branch pipe 182. The diversion block 181 is fixedly connected inside the diversion pipe 8, the branch pipe 182 is fixedly sleeved at the bottom of the diversion pipe 8, and a spiral pipe 183 is fixedly sleeved outside the branch pipe 182. One end of the spiral pipe 183 is inserted into the inside of the branch pipe 182, and exhaust holes 184 are provided on the outside of the spiral pipe 183. A fan blade 185 is movably sleeved outside the bottom end of the branch pipe 182; In this embodiment, when the low-temperature air from the outside flows inside the diversion pipe 8, the diversion block 181 will guide the low-temperature air to near the top end of the branch pipe 182, enabling the low-temperature air to enter the inside of the branch pipe 182. Since the top end of the branch pipe 182 is in a closed state, the converging low-temperature air will enter the spiral pipe 183, causing the low-temperature air to spray out from the exhaust holes 184 in a spiral flow trend, thereby forming a low-temperature air flow vortex. This will drive the fan blade 185 to rotate, causing the fan blade 185 to generate wind and dissipate heat from the lithium battery block 3 below it, thereby further improving the heat dissipation effect of the lithium battery block 3.

[0028] In summary, for the high-safety lithium battery pack of this embodiment, by setting up the cooling component 18, during the heat dissipation and cooling process of the lithium battery block 3, it can enable the inflowing low-temperature air to form a flow vortex on the top of the fan blade 185, which can drive the fan blade 185 to rotate, causing the fan blade 185 to generate wind and dissipate heat from the lithium battery block 3 below it, thereby further improving the heat dissipation and cooling effect of the lithium battery block 3.

[0029] Working principle and usage process of the present invention: First, when the lithium battery pack is working, the lithium battery block 3 itself generates heat. At this time, the heat conducting block 6 made of silica gel material can absorb the heat on the surface of the lithium battery block 3 and conduct the heat to the partition plate 5. The through holes formed on the surface of the partition plate 5 enable the heat to diffusely transfer to the inside of the partition plate 5, and this heat will flow inside the flow cavity 9, facilitating the removal of the heat on the surface of the lithium battery block 3, thereby facilitating the heat dissipation and temperature reduction of the lithium battery block 3. At the same time, the partition plate 5 and the concave placement plate 4 themselves can also adsorb heat, thus improving the heat dissipation and temperature reduction effect of the lithium battery block 3; Then, since the concave placement plate 4 itself absorbs heat and this heat is transferred to the aluminum-magnesium alloy particles inside the heat absorption bladder 13, at this time, the aluminum-magnesium alloy particles will absorb the heat and expand, causing the volume of the heat absorption bladder 13 to increase. The increase in the volume of the heat absorption bladder 13 will exert a squeezing force on the pressure sensing probe 141. In this way, the pressure sensing probe 141 will transmit the detected pressure information to the signal receiving module 142a in the form of a signal, and the signal receiving module 142a will transmit the received signal to the signal processing module 142b, and the signal processing module 142b will amplify the signal. If the pressure value detected by the pressure sensing probe 141 is greater than the pressure value set by the numerical setting module 142c, the circuit control module 142d will turn on the circuit of the ventilation component 15, causing the ventilation component 15 to operate due to being powered on; Immediately afterwards, when the intake valve 156 and the exhaust valve 157 are opened due to being powered on, the outside air will pass through the dust-proof net 152, pass through the drying plate, and flow into the inside of the concave placement plate 4 along the intake pipe 154. Moreover, the low-temperature outside air will enter from one end of the diversion pipe 8 along a bellows 7. A part of the low-temperature air flowing in the diversion pipe 8 flows out from the air outlet hole 12 and contacts the lithium battery block 3 below it, facilitating the cooling of the surface of the lithium battery block 3. Another part of the low-temperature air will flow out from the other end of the diversion pipe 8 and enter the flow cavity 9 of the concave placement plate 4 along another bellows 7, enabling the low-temperature air to exchange with the hot air flowing in the flow cavity 9, which can reduce the heat. At the same time, since the concave placement plate 4, the bellows 7, and the diversion pipe 8 are interconnected, the introduced outside low-temperature air can be used to push the high-temperature hot air in the flow cavity 9, accelerating the flow rate of the high-temperature hot air, enabling the high-temperature hot air to be discharged along the exhaust pipe 155, and facilitating the rapid diffusion of the heat inside the packaging box 1 and facilitating the rapid heat dissipation of the lithium battery block 3; Finally, when the low-temperature air outside flows inside the diversion pipe 8, the diversion block 181 guides the low-temperature air to the vicinity of the top of the branch pipe 182, enabling the low-temperature air to enter the inside of the branch pipe 182. Since the top of the branch pipe 182 is in a closed state, the converging low-temperature air will enter the spiral pipe 183, and the low-temperature air will be ejected from the exhaust hole 184 in a spiral flow trend, thus forming a low-temperature air flow vortex, which will drive the fan blade 185 to rotate, causing the fan blade 185 to generate wind and dissipate heat from the lithium battery block 3 below it, thereby further improving the heat dissipation effect of the lithium battery block 3.

[0030] 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 of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery pack with high safety performance, characterized in that: The lithium battery pack comprises: A packaging box (1), wherein a sealing cover (2) is fixedly mounted on the top of the packaging box (1), and a plurality of lithium battery blocks (3) are arranged inside the packaging box (1); A diversion heat dissipation component, the diversion heat dissipation component is located inside the packaging box (1), and the diversion heat dissipation component comprises a concave placement plate (4), a partition plate (5) is fixedly connected to the bottom of the inner cavity of the concave placement plate (4), a heat conduction block (6) is fixedly connected to the side of the partition plate (5), a bellows (7) is fixedly connected to the top of the concave placement plate (4), a diversion pipe (8) is fixedly connected to the top of the bellows (7), and the concave placement plate (4), the bellows (7) and the diversion pipe (8) are interconnected; A heat absorbing bag (13), wherein the heat absorbing bag (13) is fixedly connected to the bottom of the concave placement plate (4), and an intelligent control component (14) is provided at the bottom of the heat absorbing bag (13); A ventilation component (15), wherein the ventilation component (15) is connected to the concave placement plate (4), and the ventilation component (15) is electrically connected to the intelligent control component (14).

2. A lithium battery pack with high safety performance according to claim 1, characterized in that: A conductive column (16) is fixedly sleeved on the top of the sealing cover (2), and the bottom end of the conductive column (16) is fixedly connected to the top of the lithium battery block (3) via a conductive wire (17).

3. A lithium battery pack with high safety performance according to claim 1, characterized in that: The top of the inner cavity of the concave placement plate (4) contacts the bottom of the lithium battery block (3), and a flow cavity (9) is provided inside the concave placement plate (4), and a separator block (10) is fixedly connected inside the flow cavity (9).

4. A lithium battery pack with high safety performance according to claim 1, characterized in that: A through hole is provided on the side of the partition (5); the heat conducting block (6) is made of a silicone material, and the heat conducting block (6) is in contact with the side of the lithium battery block (3).

5. A lithium battery pack with high safety performance according to claim 1, characterized in that: A mounting sleeve (11) is fixedly connected to the top end of the bellows (7); the mounting sleeve (11) and the flow guide pipe (8) are fixedly connected via bolts; and an air outlet hole (12) is provided at the bottom of the flow guide pipe (8).

6. A lithium battery pack with high safety performance according to claim 1, characterized in that: The heat absorbing bag (13) is made of elastic material, and the interior of the heat absorbing bag (13) is filled with a heat absorbing medium.

7. A lithium battery pack with high safety performance according to claim 1, characterized in that: The intelligent control component (14) comprises a pressure sensing probe (141) and a controller (142); the pressure sensing probe (141) is fixedly connected to the bottom of the inner cavity of the packaging box (1), and the top of the pressure sensing probe (141) is in contact with the bottom of the heat absorbing bag (13); the controller (142) comprises a signal receiving module (142a), a signal processing module (142b), a value setting module (142c) and a circuit control module (142d); the input of the signal receiving module (142a) The output end of the signal receiving module (142a) is signal-connected to the output end of the pressure sensing probe (141), and the output end of the signal receiving module (142a) is signal-connected to the input end of the signal processing module (142b), the output end of the signal processing module (142b) is signal-connected to the input end of the value setting module (142c), the output end of the value setting module (142c) is signal-connected to the input end of the circuit control module (142d), and the output end of the circuit control module (142d) is electrically connected to the input end of the ventilation component (15).

8. A lithium battery pack with high safety performance according to claim 1, characterized in that: The ventilation assembly (15) comprises a shell (151), the shell (151) being fixedly mounted on a side of the packaging box (1), and a dust screen (152) being fixedly connected to one side of the shell (151), a baffle (153) being fixedly connected to the interior of the shell (151), and an air intake pipe (154) and an air exhaust pipe (155) being arranged inside the shell (151), an air intake valve (156) and an air exhaust valve (157) being fixedly mounted on the exterior of the air intake pipe (154) and the air exhaust pipe (155), and one end of the air intake pipe (154) and the air exhaust pipe (155) respectively extending to the interior of the concave placement plate (4).

9. A lithium battery pack with high safety performance according to claim 8, characterized in that: A drying plate is fixedly mounted on the inner side of the housing (151), and the drying plate is located on one side of the air intake pipe (154). Both the air intake valve (156) and the air exhaust valve (157) are one-way solenoid valves.

10. A lithium battery pack with high safety performance according to claim 1, characterized in that: The lithium battery pack further comprises a cooling component (18), the cooling component (18) comprising a guide block (181) and a branch pipe (182), the guide block (181) being fixedly connected to the inside of the guide pipe (8), the branch pipe (182) being fixedly sleeved on the bottom of the guide pipe (8), and a spiral pipe (183) being fixedly sleeved on the outside of the branch pipe (182), one end of the spiral pipe (183) being inserted into the inside of the branch pipe (182), and an exhaust hole (184) being provided on the outside of the spiral pipe (183), and a fan blade (185) being movably sleeved on the outside of the bottom end of the branch pipe (182).

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