Self-cooling lithium battery pack

Abstract

The invention discloses a self-cooling lithium battery pack, and relates to the technical field of lithium battery packs, the self-cooling lithium battery pack comprises a first lithium battery, a second lithium battery, a first assembly, a second assembly and a third assembly, the first lithium battery is positioned on one side of the second lithium battery; the arrangement of the third assembly can adjust the distance when the integrated battery pack composed of the first lithium battery and the second lithium battery is at a high temperature, the design is optimization of the heat dissipation efficiency of the lithium batteries, and the third assembly with the distance adjustment function can quickly respond to the temperature change when the lithium battery pack encounters a high-temperature working condition, so that the heat dissipation efficiency of the lithium batteries is improved. After the temperature sensor monitors that the temperature of the battery rises, the assembly can automatically start an adjusting mechanism, and the distance between adjacent lithium battery monomers is accurately increased; compared with a traditional battery pack with a fixed interval, the battery pack provided by the invention has the advantages that air circulation channels can be increased, hot air can be smoothly discharged, cold air can be quickly supplemented, and the natural convection heat dissipation effect is greatly enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium electronic battery packs, in particular to a self-cooling lithium battery pack. Background Art

[0002] In today's lithium battery application field, with the rapid development of electronic products, electric vehicles and various energy storage systems, extremely high requirements are placed on the performance, reliability and maintainability of lithium battery packs; the traditional lithium battery pack assembly process has many disadvantages in circuit connection and heat dissipation design, which seriously restricts the further optimization of lithium battery packs.

[0003] From the perspective of circuit connection, the existing conventional practice is to arrange lithium batteries and mainly rely on welding wires or conductive sheets to achieve circuit connection between batteries. This connection method has a lengthy and cumbersome operation process, requiring professional welding skills and a precise operating environment. It not only consumes a lot of manpower, material resources and time costs, but also easily introduces welding defects due to human factors in large-scale production, such as cold welding and leaking welding, which greatly reduces the circuit stability of the battery pack; what is more difficult is that once the lithium battery pack fails during subsequent use and needs to be repaired, due to the rigid connection characteristics of the welding wire or conductive sheet, the disassembly process is extremely complicated, and it is often necessary to destroy the original connection structure, which not only further increases the maintenance cost and prolongs the maintenance time, but also causes secondary damage to the surrounding intact battery cells, reducing the service life of the entire battery pack.

[0004] At the same time, in terms of heat dissipation design, the existing technology closely arranges the connected and fixed lithium batteries, and the spacing between adjacent lithium batteries cannot be flexibly adjusted. When the temperature of lithium batteries rises under high-load operation and rapid charging and discharging conditions, the narrow and fixed spacing cannot provide enough space for heat dissipation, and the heat is difficult to diffuse quickly and effectively, resulting in frequent heat accumulation inside the battery pack, which not only accelerates the aging process of the battery and reduces battery performance, but also greatly increases the safety risk of thermal runaway.

[0005] Therefore, the present invention proposes a self-cooling lithium battery pack to solve the above problems. Summary of the invention

[0006] In view of this, the technical problem to be solved by the present invention is to propose a self-cooling lithium battery pack to solve the problems existing in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solution: a self-cooling lithium battery pack, comprising: a first lithium battery, a second lithium battery, wherein the first lithium battery is located on one side of the second lithium battery, and further comprising: a first component, a second component, and a third component; The first component is used for stably placing a plurality of battery clusters consisting of first lithium batteries and second lithium batteries; The second component is used to promote the flow of cooling liquid; The third component is used for adjusting the spacing between battery components.

[0008] As an improvement, the first component includes a heat sink, a heat-conducting right-angle silicone pad is fixedly connected to the upper surface of the heat sink, and a heat-conducting silicone sheet is fixedly connected to the surface of the heat sink away from the fixing point of the heat-conducting right-angle silicone pad.

[0009] As an improvement, the side wall of the thermally conductive right-angle silicone pad is equidistantly provided with side wall heat dissipation holes A, the upper part of the thermally conductive right-angle silicone pad is equidistantly provided with top heat dissipation holes, and the thermally conductive silicone sheet is equidistantly provided with side wall heat dissipation holes B.

[0010] As an improvement, the second component includes a peristaltic pump A embedded and fixed on the side wall heat dissipation hole A, a main serpentine groove is opened on the thermal conductive right-angle silicone pad, and a secondary serpentine groove is opened on the peristaltic pump A.

[0011] As an improvement, a heat dissipation pipe is embedded in the main serpentine groove, and a part of the heat dissipation pipe is also embedded in the secondary serpentine groove. A peristaltic pump B is embedded in the heat dissipation hole A on the side wall.

[0012] As an improvement, a bolt is movably inserted into the thermally conductive right-angle silicone pad, and a screw hole column bar is fixedly connected to the upper end of the thermally conductive silicone sheet.

[0013] As an improvement, the third component includes a guide rail symmetrically fixedly connected to the heat sink, and a first supporting shell and a second supporting shell are slidably connected to the guide rail. An electric contact connector A is laterally slidably connected in the first supporting shell, and an electric contact connector B is laterally slidably connected in the second supporting shell.

[0014] As an improvement, a corrugated airbag tube is fixedly connected to one side of the first supporting shell, and one end of the corrugated airbag tube away from the first supporting shell is fixedly connected to the second supporting shell.

[0015] As an improvement, temperature sensors are fixedly connected to the inner side of the second supporting shell at equal intervals, an electric drive column is fixedly connected to the side wall of the first supporting shell via a motor, a sleeve is fixedly connected to the side wall of the second supporting shell, a sliding column is fixedly connected to the outer ring wall of the electric drive column, an annular guide groove is provided on the sleeve, and the sliding column is slidably connected in the annular guide groove.

[0016] Compared with the prior art, the present invention provides a self-cooling lithium battery pack, which has the following beneficial effects: 1. The present invention can significantly improve the heat dissipation efficiency of the battery pack by using the first component in conjunction with the second component; when the battery pack is in a high temperature environment or high load operation causes the temperature to rise, the peristaltic pump A, the heat pipe, and the peristaltic pump B in the component will work together, and with the assistance of the heat sink, the contact area with the air can be greatly increased, so that the heat can be quickly dissipated to the surrounding environment. The effective heat dissipation combination effectively avoids the heat accumulation problem caused by poor heat dissipation in traditional lithium battery packs, stably controls the battery pack temperature in an ideal range, and greatly extends the battery life.

[0017] 2. The present invention changes the connection between the thermally conductive right-angle silicone pad and the thermally conductive silicone sheet from a fixed connection to a threaded connection by setting bolts and screw hole columns. The above change can improve the installation efficiency of the first lithium battery and the second lithium battery. Compared with the traditional fixed connection method of welding or riveting, the threaded connection makes the assembly process simpler and faster. The operator does not need professional welding skills and can easily complete the installation and connection operation of the first lithium battery and the second lithium battery using only conventional tools, which greatly shortens the assembly time. In addition, the thermally conductive right-angle silicone pad and thermally conductive silicone sheet can be extended in length to adapt to the first lithium battery and the second lithium battery of different heights and sizes, which increases adaptability. This flexible adaptation feature allows the battery pack to be quickly adjusted according to different application requirements, whether it is a compact battery pack required for small portable electronic devices or a large-capacity, multi-specification battery array required for large industrial energy storage systems, which can be easily met; greatly broadening the application scenario range of the product.

[0018] 3. In addition to improving the installation compatibility of the first lithium battery and the second lithium battery of different sizes, the thermally conductive right-angle silicone pad and the thermally conductive silicone sheet in the present invention also have good buffering and shock-absorbing properties. During the operation of the equipment, they can effectively absorb mechanical vibrations from the outside, avoid vibration transmission to the lithium battery cells, reduce the damage to the internal structure of the battery caused by vibration and the risk of loosening of connectors, further improve the stability and reliability of the battery pack, reduce the failure rate of the battery pack, effectively reduce the cost of use, and provide a solid guarantee for the long-term stable operation of the product.

[0019] 4. The design of the third component of the present invention can adjust the spacing when the integrated battery pack composed of the first lithium battery and the second lithium battery generates high temperature. This design is to optimize the heat dissipation efficiency of the lithium battery, so that when the lithium battery pack encounters high temperature conditions, the third component with spacing adjustment can quickly respond to temperature changes, and can effectively detect the temperature rise after the temperature sensor detects that the battery temperature has risen. The component will automatically start the adjustment mechanism to accurately increase the spacing between adjacent lithium battery cells; compared with traditional fixed-spacing battery packs, the battery pack in the present invention can increase the air circulation channel, so that hot air can be discharged smoothly and cold air can be quickly replenished, which greatly enhances the natural convection heat dissipation effect, effectively avoids the problem of battery performance degradation and shortened life due to high temperature accumulation, and ensures that the battery pack can operate stably for a long time in a high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the appearance diagram of the present invention; Figure 2 This is a diagram of the installation process of the peristaltic pump A, the heat dissipation pipe, and the peristaltic pump B in the present invention; Figure 3 It is a side view of the main structure of the present invention; Figure 4 A diagram showing the installation process of the thermally conductive right-angle silicone pad and the thermally conductive silicone sheet through bolts and screw hole columns in the present invention; Figure 5 It is a structural diagram related to the guide rail, the first supporting shell and the second supporting shell in the present invention; Figure 6 This is an action diagram when the distance between the guide rail and the second supporting shell is adjusted in the present invention; Figure 7 A half-section view of the corrugated airbag tube of the present invention; Figure 8 For the present invention Figure 7 A magnified view of the structure in the middle.

[0021] In the figure: 1. A first lithium battery; 2. A second lithium battery; 3. First component; 301. heat sink; 302. thermally conductive right-angle silicone pad; 303. thermally conductive silicone sheet; 304. side wall heat dissipation hole A; 305. top heat dissipation hole; 306. side wall heat dissipation hole B; 4. Second component; 401. Peristaltic pump A; 402. Main serpentine groove; 403. Secondary serpentine groove; 404. Heat dissipation pipe; 405. Peristaltic pump B; 406. Bolt; 407. Screw hole column; 5. The third component; 501. Guide rail; 502. The first supporting shell; 5021. Electric contact connector A; 503. The second supporting shell; 5031. Electric contact connector B; 504. Corrugated airbag tube; 505. Temperature sensor; 506. Electric drive column; 507. Sliding column; 508. Socket tube; 509. Annular guide groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0024] Example: Please refer to Figures 1 to 4 As shown: In order to solve the problems mentioned in the technical solution, the embodiment of the present application provides a self-cooling lithium battery pack, including: a first lithium battery 1, a second lithium battery 2, the first lithium battery 1 is located on one side of the second lithium battery 2, and also includes: a first component 3, a second component 4, and a third component 5; The first component 3 is used for stably placing a plurality of battery clusters consisting of first lithium batteries 1 and second lithium batteries 2; the second component 4 is used for promoting the flow of the coolant; The first component 3 includes a heat sink 301, a heat-conducting right-angle silicone pad 302 is fixedly connected to the upper surface of the heat sink 301, a heat-conducting silicone sheet 303 is fixedly connected to the surface of the heat sink 301 away from the fixing position of the heat-conducting right-angle silicone pad 302, side wall heat dissipation holes A304 are equidistantly opened on the side wall of the heat-conducting right-angle silicone pad 302, top heat dissipation holes 305 are equidistantly fixed on the upper part of the heat-conducting right-angle silicone pad 302, and side wall heat dissipation holes B306 are equidistantly fixed on the heat-conducting silicone sheet 303. The second component 4 includes an embedded fixed A peristaltic pump A401 is provided on the heat dissipation hole A304 on the side wall, a main serpentine groove 402 is provided on the thermal conductive right-angle silicone pad 302, a secondary serpentine groove 403 is provided on the peristaltic pump A401, a heat dissipation pipe 404 is embedded in the main serpentine groove 402, and a part of the heat dissipation pipe 404 is also embedded in the secondary serpentine groove 403, a peristaltic pump B405 is embedded in the heat dissipation hole A304 on the side wall, a bolt 406 is movably inserted on the thermal conductive right-angle silicone pad 302, and a screw hole column bar 407 is fixedly connected to the upper end of the thermal conductive silicone sheet 303.

[0025] in: The first component 3 is used for stably placing multiple battery clusters consisting of first lithium batteries 1 and second lithium batteries 2; and the first supporting shell 502 and the second supporting shell 503 are a group, and the number of groups is the same as the number of battery clusters consisting of the first lithium battery 1 and the second lithium battery 2. It will not be repeated below and will only be described as one group.

[0026] The heat sink 301 can be made of high-purity aluminum alloy, a three-dimensional multi-layer fin structure and an anodized treatment to ensure excellent thermal conductivity and corrosion resistance.

[0027] The thermally conductive right-angle silicone pad 302 and the thermally conductive silicone sheet 303 are both made of silicone material with a high thermal conductivity of >3W / mK and a wide temperature resistance range of -40°C-200°C, ensuring seamless heat conduction of the battery cluster consisting of the first lithium battery 1 and the second lithium battery 2.

[0028] The thermally conductive right-angle silicone pad 302 and the thermally conductive silicone sheet 303 are made of silicone material and can assist in fastening the first lithium battery 1 and the second lithium battery 2 under the action of elastic force.

[0029] The side wall heat dissipation holes A304 , the top heat dissipation holes 305 and the side wall heat dissipation holes B306 are mainly used for heat dissipation of the first lithium battery 1 and the second lithium battery 2 .

[0030] The second component 4 is used to promote the flow of the cooling liquid.

[0031] For further examples, please refer to Figures 5 to 8 As shown: The third component 5 is used for adjusting the spacing of the battery components. The third component 5 includes a guide rail 501 symmetrically fixedly connected to the heat sink 301, and a first supporting shell 502 and a second supporting shell 503 are slidably connected to the guide rail 501. An electric contact connector A5021 is slidably connected in the first supporting shell 502, and an electric contact connector B5031 is slidably connected in the second supporting shell 503. A corrugated airbag tube 504 is fixedly connected to one side of the first supporting shell 502, and the corrugated airbag tube 504 is away from the first supporting shell 502. One end of the first supporting shell 502 is fixedly connected to the second supporting shell 503, and a temperature sensor 505 is fixedly connected to the inner side of the second supporting shell 503 at an equal distance. The side wall of the first supporting shell 502 is fixedly connected to an electric drive column 506 through a motor, and the side wall of the second supporting shell 503 is fixedly connected to a sleeve 508. A sliding column 507 is fixedly connected to the outer ring wall of the electric drive column 506, and an annular guide groove 509 is opened on the sleeve 508, and the sliding column 507 is slidably connected in the annular guide groove 509.

[0032] in: The third component 5 is used for adjusting the distance between the battery components.

[0033] The electrical contact connector A5021 and the electrical contact connector B5031 can ensure the electrical connection between the first lithium battery 1 and the second lithium battery 2 when the distance between the first supporting shell 502 and the second supporting shell 503 changes.

[0034] The temperature sensor 505 can be implemented as a high-precision platinum resistance temperature sensor with a high-temperature resistant ceramic package to ensure accurate and stable temperature measurement.

[0035] There is an electrical connection between the temperature sensor 505 and the peristaltic pump A401 and the peristaltic pump B405. When the temperature rises, the temperature sensor 505 will work by energizing the peristaltic pump A401 and the peristaltic pump B405.

[0036] The electric drive column 506 is driven by a motor, and the sliding column 507 is slidably matched with the annular guide groove 509 .

[0037] Everything in the above example works like this: In the initial state: The first lithium battery 1 and the second lithium battery 2 are not placed in the first supporting shell 502 and the second supporting shell 503, the thermal conductive right-angle silicone pad 302 is not assembled with the thermal conductive silicone sheet 303 by the bolts 406 through the screw hole column 407, the peristaltic pump A401, the heat dissipation pipe 404, and the peristaltic pump B405 are not installed in the grooves opened on the thermal conductive right-angle silicone pad 302 and the thermal conductive silicone sheet 303, and the electric contact connector A5021 and the electric contact connector B5031 partially overlap.

[0038] The following is the working process of the first component 3 and the second component 4: When in use, first place the first lithium battery 1 and the second lithium battery 2 in the first supporting shell 502 and the second supporting shell 503 respectively, then threadably assemble the thermally conductive right-angle silicone pad 302 with the thermally conductive silicone sheet 303 with the aid of the screw hole column bar 407 on the thermally conductive silicone sheet 303 through the bolt 406, and then install the peristaltic pump A401, the heat pipe 404, and the peristaltic pump B405 in the grooves opened on the thermally conductive right-angle silicone pad 302 and the thermally conductive silicone sheet 303, that is, the main serpentine groove 402 and the auxiliary serpentine groove 403. For the assembly process and the state after assembly, please refer to the attached Figure 2 To Attachment Figure 4 ; Furthermore, when the temperature of the battery pack composed of the first lithium battery 1 and the second lithium battery 2 rises, the temperature sensor 505 located on one side of the first lithium battery 1 and the second lithium battery 2 and fixedly connected to the inner wall of the first supporting shell 502 and the second supporting shell 503 will cause the electrically connected motor for driving the electric drive column 506 to work. Figure 6 To Attachment Figure 8At this time, as the electric drive column 506 rotates, the sliding column 507 on the electric drive column 506 interacts with the annular guide groove 509 on the sleeve 508. As the sliding column 507 slides in the annular guide groove 509, the electric drive column 506 originally sleeved in the sleeve 508 will gradually move out, and the distance between the first supporting shell 502 and the second supporting shell 503 will increase. It should be noted that the electric contact connector A5021 and the electric contact connector B5031 used to connect the first lithium battery 1 and the second lithium battery 2 are still in overlapping connection, and the circuit will not be disconnected; Furthermore, as the distance between the first supporting shell 502 and the second supporting shell 503 increases, the distance between the first lithium battery 1 and the second lithium battery 2 located therein will increase, thereby increasing air circulation, and at the same time, the side wall heat dissipation holes A304, the top heat dissipation holes 305, and the side wall heat dissipation holes B306 will also cooperate in heat dissipation; Furthermore, through the coordinated use of the first component 3 and the second component 4, the heat dissipation efficiency of the battery pack can be significantly improved; when the battery pack is in a high temperature environment or high load operation causes the temperature to rise, the peristaltic pump A401, the heat pipe 404, and the peristaltic pump B405 in the component will work together, and with the assistance of the heat sink 301, the contact area with the air can be greatly increased, so that the heat can be quickly dissipated to the surrounding environment. The effective heat dissipation combination effectively avoids the heat accumulation problem caused by poor heat dissipation in traditional lithium battery packs, and stably controls the battery pack temperature in an ideal range, greatly extending the battery life.

[0039] Furthermore, by setting the bolt 406 and the screw hole column bar 407, the connection relationship between the thermal conductive right-angle silicone pad 302 and the thermal conductive silicone sheet 303 is changed from a fixed connection to a threaded connection, and the above-mentioned change can improve the installation efficiency of the first lithium battery 1 and the second lithium battery 2. Compared with the traditional fixed connection method of welding or riveting, the threaded connection makes the assembly process simpler and faster. The operator does not need professional welding skills and can easily complete the installation and connection operation of the first lithium battery 1 and the second lithium battery 2 using only conventional tools, which greatly shortens the assembly time; Moreover, the heat-conducting right-angle silicone pad 302 and the heat-conducting silicone sheet 303 can be extended in length under the design of silicone material, so as to adapt to the first lithium battery 1 and the second lithium battery 2 of different heights and sizes, thereby increasing adaptability. This flexible adaptability allows the battery pack to be quickly adjusted according to different application requirements, whether it is a compact battery pack required for a small portable electronic device or a large-capacity, multi-specification battery array required for a large industrial energy storage system, which can be easily met; greatly broadening the scope of application scenarios of the product.

[0040] Furthermore, in addition to improving the installation compatibility of the first lithium battery 1 and the second lithium battery 2 of different sizes, the thermally conductive right-angle silicone pad 302 and the thermally conductive silicone sheet 303 also have good buffering and shock-absorbing properties. During the operation of the equipment, they can effectively absorb mechanical vibrations from the outside world, avoid vibration transmission to the lithium battery cells, reduce damage to the internal structure of the battery caused by vibration and the risk of loosening of connectors, further improve the stability and reliability of the battery pack, reduce the failure rate of the battery pack, effectively reduce the cost of use, and provide a solid guarantee for the long-term stable operation of the product.

[0041] Furthermore, through the design of the third component 5, the spacing can be adjusted when the integrated battery pack composed of the first lithium battery 1 and the second lithium battery 2 generates high temperature. This design is to optimize the heat dissipation efficiency of the lithium battery, so that when the lithium battery pack encounters high temperature conditions, the third component 5 with spacing adjustment can respond quickly to temperature changes, and can effectively detect the temperature rise after the temperature sensor 505 detects that the battery temperature has risen. The component will automatically start the adjustment mechanism to accurately increase the spacing between adjacent lithium battery cells; compared with traditional fixed-spacing battery packs, the battery pack in the present invention can increase the air circulation channel, so that hot air can be discharged smoothly, and cold air can be quickly replenished, which greatly enhances the natural convection heat dissipation effect, effectively avoids the problem of battery performance degradation and shortened life due to high temperature accumulation, and ensures that the battery pack can operate stably for a long time in a high temperature environment.

[0042] Please refer to the above working process Figures 1 to 8 .

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cooling lithium battery pack, comprising: A first lithium battery (1) and a second lithium battery (2), wherein the first lithium battery (1) is located on one side of the second lithium battery (2), and is characterized in that it further comprises: a first component (3), a second component (4), and a third component (5); The first component (3) is used for stably placing a plurality of battery clusters consisting of first lithium batteries (1) and second lithium batteries (2); The second component (4) is used to promote the flow of cooling liquid; The third component (5) is used to adjust the spacing between battery components.

2. A self-cooling lithium battery pack according to claim 1, characterized in that: The first component (3) comprises a heat sink (301), the upper surface of the heat sink (301) being fixedly connected to a thermally conductive right-angle silicone pad (302), and the surface of the heat sink (301) away from the fixing location of the thermally conductive right-angle silicone pad (302) being fixedly connected to a thermally conductive silicone sheet (303).

3. A self-cooling lithium battery pack according to claim 2, characterized in that: The side wall of the thermally conductive right-angle silicone pad (302) is provided with side wall heat dissipation holes A (304) at equal intervals, the upper part of the thermally conductive right-angle silicone pad (302) is provided with top heat dissipation holes (305) at equal intervals, and the thermally conductive silicone sheet (303) is provided with side wall heat dissipation holes B (306) at equal intervals.

4. A self-cooling lithium battery pack according to claim 3, characterized in that: The second component (4) comprises a peristaltic pump A (401) embedded and fixed on the side wall heat dissipation hole A (304), a main serpentine groove (402) is provided on the thermal conductive right-angle silicone pad (302), and a secondary serpentine groove (403) is provided on the peristaltic pump A (401).

5. A self-cooling lithium battery pack according to claim 4, characterized in that: A heat dissipation pipe (404) is embedded in the main serpentine groove (402), and a portion of the heat dissipation pipe (404) is also embedded in the secondary serpentine groove (403). A peristaltic pump B (405) is embedded in the side wall heat dissipation hole A (304).

6. A self-cooling lithium battery pack according to claim 4, characterized in that: A bolt (406) is movably inserted into the thermally conductive right-angle silicone pad (302), and a screw hole column bar (407) is fixedly connected to the upper end of the thermally conductive silicone sheet (303).

7. The self-cooling lithium battery pack according to claim 2, characterized in that: The third component (5) comprises a guide rail (501) symmetrically fixedly connected to the heat sink (301); a first supporting shell (502) and a second supporting shell (503) are slidably connected to the guide rail (501); an electric contact connector A (5021) is slidably connected inside the first supporting shell (502); and an electric contact connector B (5031) is slidably connected inside the second supporting shell (503).

8. The self-cooling lithium battery pack according to claim 7, characterized in that: A corrugated airbag tube (504) is fixedly connected to one side of the first supporting shell (502), and one end of the corrugated airbag tube (504) away from the first supporting shell (502) is fixedly connected to the second supporting shell (503).

9. The self-cooling lithium battery pack according to claim 7, characterized in that: Temperature sensors (505) are fixedly connected to the inner side of the second supporting shell (503) at equal intervals; an electric drive column (506) is fixedly connected to the side wall of the first supporting shell (502) via a motor; a sleeve tube (508) is fixedly connected to the side wall of the second supporting shell (503); a sliding column (507) is fixedly connected to the outer ring wall of the electric drive column (506); an annular guide groove (509) is formed on the sleeve tube (508), and the sliding column (507) is slidably connected in the annular guide groove (509).

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