Lithium battery structure with enhanced heat dissipation performance

Abstract

The invention relates to the technical field of lithium batteries with enhanced heat dissipation performance, in particular to a lithium battery structure with enhanced heat dissipation performance, which comprises a battery box, battery cabins, lithium batteries with the number corresponding to that of the battery cabins, fixing assemblies with the number corresponding to that of the lithium batteries, a heat dissipation assembly and a cover plate, the liquid cooling box in the heat dissipation assembly extends into the battery box through the guide groove, is directly contacted with the lithium battery and serves as an efficient heat conduction medium, and compared with the condition that a traditional lithium battery lacks an effective heat conduction medium, the liquid cooling box can quickly transfer heat generated by the battery cells out, so that uneven temperature distribution between the battery cells is effectively avoided, local overheating is prevented, and the service life of the lithium battery is prolonged. For example, in the high-power discharging process, the liquid cooling box can rapidly take away heat, so that the temperatures of the battery cells tend to be consistent, the charging and discharging efficiency of the battery is improved, battery aging caused by too high temperature is reduced, and the service life of the lithium battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries with enhanced heat dissipation performance, and in particular to a lithium battery structure with enhanced heat dissipation performance. Background Art

[0002] As we all know, with the rapid development of new energy technology, lithium batteries have been widely used in electric vehicles, energy storage systems and other fields due to their advantages such as high energy density and long cycle life. However, during high-rate discharge or fast charging, lithium batteries will generate a lot of heat.

[0003] On the one hand, traditional lithium battery cells usually lack an effective heat conduction medium, and the heat generated by the cells is difficult to transfer out quickly, resulting in uneven temperature distribution between the cells and excessively high local temperatures, which not only reduces the battery's charge and discharge efficiency, but also accelerates battery aging and shortens battery life. On the other hand, existing cooling methods, such as air cooling, have low cooling efficiency and are difficult to meet the heat dissipation needs of high-power lithium batteries. The air cooling method is greatly affected by the environment, and the cooling effect is significantly reduced in high temperature environments, making it impossible to achieve accurate and efficient cooling of the battery pack, and the heat exchange efficiency between the cooling system and the battery cells is not high. In addition, the packaging structure of existing lithium batteries is mostly integral. Once a cell or component inside fails, it is difficult to repair or replace it separately. The repair cost is high and the operation is complicated, which is not conducive to the maintenance and upgrade of the battery pack. These problems seriously restrict the performance and safety of lithium batteries in high-power application scenarios. Summary of the Invention

[0004] The purpose of the present invention is to provide a lithium battery structure with enhanced heat dissipation performance, which solves the problems of poor heat dissipation and inconvenience in disassembly in the background art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A lithium battery structure with enhanced heat dissipation performance, comprising: Battery box; A battery compartment, the battery compartment being disposed in the battery box; Lithium batteries corresponding in number to the battery compartments, the lithium batteries being detachably arranged in the battery compartments; Fixing components corresponding to the number of the lithium batteries, the fixing components being mounted on the battery box and used to fix the lithium batteries in the battery compartment; A heat dissipation component is installed at the bottom of the battery box and is used to reduce the heat generated by the lithium battery during use. The heat dissipation component includes a mounting slot, which is opened at the bottom of the battery box. A guide slot is opened in the battery box, and the guide slot is communicated with the mounting slot. A liquid cooling box is fixedly installed in the mounting slot, and the liquid cooling box extends into the battery box through the guide slot. A circulation pipe is fixedly installed between the liquid cooling boxes; and a cover plate, which is detachably arranged on the top of the battery box. The top of the cover plate is provided with heat dissipation fin holes, and the heat dissipation fin holes are arranged in a matrix.

[0006] Preferably, output tubes are fixedly provided on both sides of the bottom of the liquid cooling box on one side, a connecting tube is fixedly provided on the top of the output tube, a long groove is provided on the side of the battery box, a circulating pump is detachably provided in the long groove, and the liquid inlet and liquid outlet of the circulating pump are respectively fixed and communicated with the corresponding connecting tubes.

[0007] Preferably, a slide groove is provided on the battery box, and a PCM interlayer is slidably arranged in the slide groove. The PCM interlayer is a high thermal conductivity phase change material, and the PCM interlayer is located between the lithium batteries.

[0008] Preferably, the fixing assembly includes a rotating groove, which is opened on one side of the battery box, a fixed block is fixedly arranged in the rotating groove, a rotating plate is rotatably arranged between the fixed blocks, a card block is fixedly arranged on the top of the rotating plate, a card slot is opened on the card block, and a limit block adapted to the card slot is fixedly arranged on the other side of the battery box, and the limit block is provided with an inclined surface.

[0009] Preferably, a plurality of rubber pads are fixedly provided on the bottom of the rotating plate, and the rubber pads fit the lithium battery.

[0010] Preferably, the positions of the lithium batteries are optimized by thermal coupling simulation to optimize the arrangement of the lithium battery cells.

[0011] Preferably, the battery box is provided with sliding grooves corresponding to the number of the lithium batteries, a sliding block is slidably arranged in the sliding groove, an arc-shaped groove is provided on the sliding block, and the arc-shaped groove is adapted to the lithium batteries, one end of the first spring is fixedly provided on both sides of the sliding block, and the other end of the first spring is fixed to the battery box.

[0012] Preferably, vertical plates are fixedly provided in the battery box, the vertical plates are located on both sides of the sliding block, slots are provided on the vertical plates, sliding columns are fixedly provided on both sides of the sliding block, and the sliding columns are slidably provided with the slots.

[0013] Preferably, at least one limiting groove is provided on the sliding block, a limiting plate is slidably arranged in the limiting groove, an auxiliary groove is provided on the limiting plate, a pressing plate is slidably arranged in the auxiliary groove, one end of a second spring is fixedly provided on the top of the pressing plate, and the other end of the second spring is fixedly provided to the sliding block.

[0014] Preferably, a rotating opening is provided on the side of the pressing plate, one end of a bent plate is rotatably arranged in the rotating opening, the other end of the bent plate is fitted with the limiting plate, and a long hole adapted to the bent plate is provided on the side of the sliding block.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The liquid cooling box in the heat dissipation assembly extends into the battery box through a guide slot, directly contacting the lithium-ion battery and acting as a highly efficient heat transfer medium. Compared to traditional lithium-ion batteries, which lack an effective heat transfer medium, the liquid cooling box can quickly transfer the heat generated by the battery cells, effectively avoiding uneven temperature distribution between the battery cells and preventing local overheating. For example, during high-power discharge, the liquid cooling box can quickly remove heat, making the temperature of each battery cell tend to be consistent, thereby improving the battery's charge and discharge efficiency, reducing battery aging caused by excessive temperature, and extending the lithium-ion battery's service life.

[0016] 2. Liquid cooling significantly improves cooling efficiency compared to air cooling, meeting the heat dissipation needs of high-power lithium batteries. The liquid cooling system is not affected by ambient temperature and can maintain a stable cooling effect even in high-temperature environments. Circulation pipes connect various liquid cooling boxes to form a circulating cooling loop, achieving precise and efficient cooling of the battery pack, ensuring that the lithium battery can maintain a suitable operating temperature under various working conditions, and improving the performance and safety of the battery in high-power application scenarios.

[0017] 3. The lithium battery is detachably mounted in the battery compartment, and the fixed components facilitate installation and removal of the lithium battery. When a cell or component inside the lithium battery fails, there is no need to repair the entire battery pack as with the existing integral packaging structure. Instead, only the faulty lithium battery needs to be removed for separate repair or replacement, significantly reducing maintenance costs and simplifying the operating process. At the same time, this detachable design also facilitates battery pack upgrades. Users can replace lithium batteries with better performance as needed to improve the overall performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side structural schematic diagram of the present invention; Figure 2 This is a schematic structural diagram of the cover plate of the present invention; Figure 3 Schematic diagram of the structure of the heat dissipation assembly of the present invention; Figure 4It is a structural schematic diagram of the installation slot of the present invention; Figure 5 Schematic diagram of the structure of the PCM interlayer of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at A in the middle; Figure 7 It is a structural schematic diagram of the rotating tank of the present invention; Figure 8 It is a structural schematic diagram of the guide groove of the present invention; Figure 9 It is a structural schematic diagram of the fixing assembly of the present invention; Figure 10 It is a structural schematic diagram of the chute of the present invention; Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure at B in the middle; Figure 12 Schematic diagram of the structure of the limiting plate of the present invention.

[0019] Among them: 1. Battery box; 2. Battery compartment; 3. Lithium battery; 4. Fixing assembly; 5. Heat dissipation assembly; 6. Mounting slot; 7. Guide slot; 8. Liquid cooling box; 9. Circulation pipe; 10. Cover plate; 11. Output pipe; 12. Connecting pipe; 13. Long slot; 14. Circulation pump; 15. Slide; 16. PCM interlayer; 17. Rotation slot; 18. Fixing block; 19. Rotation plate; 20. Card block; 21. Card Groove; 22. Limit block; 23. Rubber pad; 24. Insulation layer; 25. Heat dissipation fin hole; 26. Inclined surface; 27. Sliding groove; 28. Sliding block; 29. ​​Arc groove; 30. First spring; 31. Vertical plate; 32. Notch; 33. Sliding column; 34. Limiting groove; 35. Limiting plate; 36. Auxiliary groove; 37. Pressing plate; 38. Second spring; 39. Rotation mouth; 40. Bend plate; 41. Long hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-11 A lithium battery structure with enhanced heat dissipation performance includes a battery box 1, a battery compartment 2, lithium batteries 3 corresponding to the number of the battery compartments 2, a fixing component 4 corresponding to the number of the lithium batteries 3, a heat dissipation component 5 and a cover plate 10.

[0022] The battery box 1 serves as the outer shell of the entire lithium battery structure and is made of a material with high strength and certain insulation properties, such as engineering plastics or metal alloys. The surface of the battery box 1 can be specially treated, such as painting or coating, to enhance its wear resistance and corrosion resistance. The battery compartment 2 is opened in the battery box 1 and is the installation position of the lithium battery 3. The number of battery compartments 2 corresponds to the number of lithium batteries 3, and their shape and size are adapted to the lithium battery 3 to ensure that the lithium battery 3 can be firmly installed in the battery compartment 2. The inner wall of the battery compartment 2 is insulated to prevent electrical faults such as short circuits between the lithium batteries 3. The lithium battery 3 is detachable and arranged in the battery compartment 2 for easy replacement and maintenance.

[0023] The mounting groove 6 of the heat dissipation component 5 is opened at the bottom of the battery box 1, and the guide groove 7 is communicated with the mounting groove 6. The opening of the mounting groove 6 and the guide groove 7 provides space for the installation of the liquid cooling box 8 and the circulation pipe 9. The liquid cooling box 8 fixedly arranged in the mounting groove 6 extends into the battery box 1 through the guide groove 7. The liquid cooling box 8 is made of a material with good thermal conductivity and can effectively absorb the heat generated by the lithium battery 3. The circulation pipe 9 fixedly arranged between the liquid cooling boxes 8 is made of a heat-conducting metal material, and an insulation layer 24 is provided on its outer surface. The function of the circulation pipe 9 is to circulate the coolant between the liquid cooling boxes 8, transfer the heat to the liquid cooling box 8, and then dissipate it through the liquid cooling box 8. The setting of the insulation layer 24 can reduce the heat loss of the coolant during the circulation process and improve the heat dissipation efficiency.

[0024] Output pipes 11 are fixedly arranged on both sides of the bottom of the liquid cooling box 8 on one side, and a connecting pipe 12 is fixedly arranged on the top of the output pipe 11. A long groove 13 is provided on the side of the battery box 1, and a circulating pump 14 is detachably arranged in the long groove 13. The liquid inlet and liquid outlet of the circulating pump 14 are respectively fixed and communicated with the corresponding connecting pipe 12. The function of the circulating pump 14 is to drive the coolant to flow in the circulating pipe 9 and the liquid cooling box 8 to realize the circulation and heat dissipation of the coolant. Through the operation of the circulating pump 14, the heat generated by the lithium battery 3 can be continuously taken away, and the temperature of the lithium battery 3 can be kept within a reasonable range.

[0025] The battery box 1 is provided with a slide groove 15. The PCM interlayer 16 slidingly arranged in the slide groove 15 is a high thermal conductivity phase change material and is located between the lithium batteries 3. When the temperature of the lithium battery 3 rises, the PCM interlayer 16 will undergo a phase change and absorb heat, thereby regulating the temperature of the lithium battery 3. When the temperature of the lithium battery 3 drops, the PCM interlayer 16 will release heat to maintain the temperature of the lithium battery 3 stable. The sliding setting of the PCM interlayer 16 facilitates installation and replacement to adapt to different lithium battery 3 arrangements and heat dissipation requirements.

[0026] The rotation groove 17 of the fixing component 4 is opened on one side of the battery box 1. The fixing block 18 fixedly arranged in the rotation groove 17 is made of metal or plastic material and is firmly connected to the battery box 1 by welding or bolting. The rotating plate 19 rotatably arranged between the fixing blocks 18 is made of a material that is compatible with the fixing blocks 18 and can be flexibly rotated between the fixing blocks 18. A plurality of rubber pads 23 are fixedly arranged at the bottom of the rotating plate 19. The rubber pads 23 have good elasticity and wear resistance, fit with the lithium battery 3, can effectively fix the lithium battery 3, prevent it from shaking in the battery compartment 2, and at the same time play a certain role in buffering The impact effect is reduced, and the influence of external impact force on the lithium battery 3 is reduced. A block 20 is fixedly set on the top of the rotating plate 19, and a slot 21 is provided on the block 20. A limit block 22 adapted to the slot 21 is fixedly provided on the other side of the battery box 1, and a slope 26 is provided on the limit block 22. When the rotating plate 19 is rotated, the slot 21 on the block 20 can cooperate with the limit block 22 to fix the rotating plate 19 in a specific position, thereby fixing the lithium battery 3. The design of the slope 26 on the limit block 22 makes it easier for the rotating plate 19 to cooperate with the limit block 22, thereby improving the convenience and stability of fixation.

[0027] The position of lithium battery 3 is optimized by thermal coupling simulation. Through thermal coupling simulation technology, the temperature distribution of lithium battery 3 under different arrangements can be analyzed, thereby optimizing the arrangement of lithium battery 3 cells, reducing heat accumulation, and improving the heat dissipation performance and overall stability of lithium battery 3.

[0028] The primary task of thermal coupling simulation optimization is to clarify the optimization objectives and constraints. The optimization objective is to reduce the maximum temperature of lithium battery 3 to prevent thermal runaway and improve temperature uniformity. The temperature difference between each cell of lithium battery 3 is required to be controlled within 5°C to ensure the consistency of lithium battery 3 performance. The heat dissipation efficiency is optimized. For air-cooled or liquid-cooled systems, their energy consumption ratio is improved to achieve a balance between efficient heat dissipation and low energy consumption. Constraints include multiple aspects. In terms of volume and weight restrictions of lithium battery 3, the volume and weight of the entire lithium battery 3 are limited according to the needs of the actual application scenario to meet the space and weight requirements of the equipment. The cost constraint of the cooling system is considered. Considering factors such as the complexity of the liquid cooling pipeline and material cost, it is necessary to control the cost when designing the heat dissipation system. The thermal characteristics of lithium battery 3 are also different. Since different types of lithium battery 3, such as cylindrical, square, and soft-pack lithium battery 3, have different thermal physical parameters such as specific heat capacity and thermal conductivity, these differences need to be fully considered during the design process to ensure that the simulation results are consistent with the actual situation.

[0029] Obtaining the thermophysical properties of lithium battery 3 is the basis for thermal coupling simulation. Key parameters include specific heat capacity, thermal conductivity, and internal resistance heat generation rate. The heat generation rate is calculated using the Bernardi equation, which comprehensively considers factors such as the electrochemical reaction and ohmic heat of lithium battery 3. In actual measurements, an isothermal calorimeter, such as the THTBAC-800A, is used to accurately measure the heat generation of lithium battery 3. An infrared thermal imager is used to calibrate the surface temperature distribution of lithium battery 3 to obtain real and reliable experimental data, providing a basis for simulation.

[0030] In the multi-physics field simulation link, it is necessary to select appropriate simulation software. Software such as ANSYS Fluent and COMSOL can realize the coupled simulation of electric-thermal-fluid fields, which is suitable for complex lithium battery 3 thermal analysis scenarios. Star-CCM+ software has automatic grid optimization and powerful transient analysis functions, which can improve simulation efficiency and accuracy. Grid division is an important step in simulation setting. The boundary layer of lithium battery 3 is encrypted to more accurately simulate the physical phenomena at the boundary. At the same time, grid independence verification is performed. By changing the number and density of grids and comparing the simulation results, the rationality of grid division is ensured. The boundary condition settings include ambient temperature, convective heat transfer coefficient and battery cell heating power, which are determined by the SOC mapping table. The accurate setting of these parameters directly affects the accuracy of the simulation results. The solver is set to transient analysis mode, and the convergence residual is set to less than 1e-6 to ensure the accuracy and reliability of the simulation calculation results.

[0031] A comprehensive analysis of the simulation results is the key to optimizing the design of lithium battery 3. The output parameters include temperature distribution cloud map, maximum temperature, temperature difference standard deviation and cooling system pressure drop. Through the temperature distribution cloud map, the temperature distribution inside the lithium battery 3 can be intuitively observed. The maximum temperature and temperature difference standard deviation are used to evaluate the temperature uniformity and thermal stability of the lithium battery 3. The cooling system pressure drop parameter is used to evaluate the energy consumption of the liquid cooling system. The optimization methods mainly include parameter scanning method, which traverses the parameter combinations such as the spacing between lithium batteries 3 and the coolant flow rate, analyzes the impact of different parameters on the performance of lithium battery 3, and finds the optimal design solution. The response surface method, by establishing an agent model, quickly predicts the performance of lithium battery 3 under different design parameters and accelerates the optimization process. Genetic algorithm, NSGA-II, and other multi-objective optimization algorithms can consider multiple optimization objectives at the same time, find the best balance between multiple objectives, and achieve a comprehensive improvement in the performance of lithium battery 3.

[0032] To ensure the feasibility of the optimization scheme, experimental verification and iteration are required. First, use 3D printing or CNC processing technology to make an optimized lithium battery 3 prototype. Then, place the lithium battery 3 in a constant temperature box and use a charge and discharge tester, such as ArbinBT-5HC, to simulate the charge and discharge process under actual working conditions to test the performance of the lithium battery 3. Compare the experimental measurement data with the lithium battery 3. The error between the simulation and the measured temperature is required to be controlled within 10%. If the error exceeds the range, the lithium battery 3 needs to be corrected, re-simulated and optimized. Through continuous iteration, the design scheme of the lithium battery 3 is gradually improved to improve its performance and reliability.

[0033] The cover plate 10 is detachably mounted on the top of the battery box 1, and the two are connected by bolts. The bolt connection method can provide reliable connection strength. At the same time, auxiliary components such as sealing gaskets are used to ensure the sealing of the connection parts, preventing external impurities such as dust and moisture from entering the battery and affecting the normal operation of the lithium battery 3.

[0034] The top of the cover plate 10 is provided with heat dissipation fin holes 25, which are arranged in a matrix. This arrangement increases the surface area of ​​the cover plate 10. When air flows between the heat dissipation fin holes 25, the heat exchange rate between the air and the cover plate 10 is accelerated, and the heat generated by the lithium battery 3 is promoted to be dissipated into the surrounding environment through the cover plate 10. The heat dissipation fin holes 25 work together with the heat dissipation component 5 to form a heat dissipation system of the lithium battery structure, further improving the heat dissipation effect and ensuring that the lithium battery 3 operates within an appropriate temperature range.

[0035] The sliding groove 27 is opened in the battery box 1, providing a sliding track for the sliding block 28. The sliding block 28 is provided with an arc groove 29 adapted to the lithium battery 3. The lithium battery 3 is placed in the arc groove 29. The two sides of the sliding block 28 are connected to the first spring 30. The other end of the first spring 30 is fixed on the battery box 1. When the lithium battery 3 has not expanded, the first spring 30 is in a certain initial compression state. At this time, the sliding block 28 is in a relatively stable position in the sliding groove 27, and the lithium battery 3 is stably fixed in the arc groove 29.

[0036] When the lithium battery 3 expands, its volume increases, and the lithium batteries 3 on both sides will generate an outward thrust on the sliding block 28. Since the sliding block 28 and the sliding groove 27 can slide relative to each other, and the first spring 30 is elastic, the sliding block 28 will slide in the sliding groove 27 in a direction away from the lithium battery 3, while compressing the first spring 30. During the compression of the first spring 30, an elastic force opposite to the expansion force of the lithium battery 3 will be generated. This elastic force can effectively buffer the pressure generated by the expansion of the lithium battery 3 and prevent the lithium battery 3 from being damaged due to excessive rigid constraints. As the sliding block 28 slides, the position of the lithium battery 3 in the arc groove 29 will also be adjusted accordingly to adapt to the expansion of the lithium battery 3, ensuring that the relative position relationship between the lithium battery 3 and the surrounding components remains reasonable, thereby maintaining the stability of the internal structure of the battery.

[0037] When the lithium battery 3 shrinks, its volume decreases, and the thrust on the sliding block 28 also decreases. At this time, the elastic force of the first spring 30 is greater than the force of the lithium battery 3 on the sliding block 28. The first spring 30 will gradually return to its original state, pushing the sliding block 28 to slide in the sliding groove 27 toward the direction close to the lithium battery 3. The sliding of the sliding block 28 will drive the lithium battery 3 to move in the arc groove 29, so that the lithium battery 3 returns to a suitable position, keeps the lithium battery 3 fixed in the battery box 1, and prevents the lithium battery 3 from loosening or shaking due to shrinkage.

[0038] The adaptive expansion compensation structure of the lithium battery 3 formed by the sliding groove 27 and the sliding block 28 in conjunction with the first spring 30 can effectively adapt to the volume change of the lithium battery 3 during use. Through the sliding of the sliding block 28 in the sliding groove 27 and the elastic deformation of the first spring 30, dynamic compensation for the expansion and contraction of the lithium battery 3 is achieved, avoiding excessive stress on the lithium battery 3 due to volume change, protecting the internal structure and performance of the lithium battery 3, improving the safety and reliability of the lithium battery 3, and extending the service life of the lithium battery 3.

[0039] The vertical plate 31 fixedly arranged in the battery box 1 is located on both sides of the sliding block 28. The vertical plate 31 is made of a strong material, such as metal or engineering plastic, and is firmly connected to the battery box 1 by welding or bolting. A slot 32 is provided on the vertical plate 31. The size of the slot 32 is adapted to the sliding column 33, which provides a guide for the sliding of the sliding column 33. The sliding columns 33 are fixedly arranged on both sides of the sliding block 28, and the sliding columns 33 are slidably arranged with the slot 32. The existence of the sliding column 33 makes the sliding of the sliding block 28 in the sliding groove 27 more stable, and also limits the moving direction of the sliding block 28, ensuring that the sliding block 28 can only slide along a specific direction in the sliding groove 27, thereby improving the positioning accuracy of the sliding block 28 and the lithium battery 3.

[0040] The locking plate 37 is secured to the locking cam 36 and secured to the locking cam 36 so that the locking cam 36 can be unlocked and unlocked.

[0041] A rotating opening 39 is provided on the side of the pressing plate 37, and one end of a bent plate 40 is rotatably arranged in the rotating opening 39, and the other end of the bent plate 40 is fitted with the limiting plate 35. A long hole 41 is provided on the side of the sliding block 28 that is adapted to the bent plate 40. When the pressing plate 37 is pressed, the bent plate 40 rotates with the movement of the pressing plate 37, and the other end of the bent plate 40 can contact or separate from the limiting plate 35. The lithium battery 3 can be locked and unlocked by moving the limiting plate 35. The design of the long hole 41 provides space for the rotation of the bent plate 40, ensuring that the bent plate 40 can smoothly cooperate with the limiting plate 35, further improving the fixing stability of the lithium battery 3.

[0042] While the 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 alterations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery structure with enhanced heat dissipation performance, characterized in that: include: Battery box (1); A battery compartment (2), the battery compartment (2) being provided in the battery box (1); Lithium batteries (3) corresponding in number to the battery compartment (2), the lithium batteries (3) being detachably arranged in the battery compartment (2); Fixing components (4) corresponding in number to the number of the lithium batteries (3), the fixing components (4) being mounted on the battery box (1) and used to fix the lithium batteries (3) in the battery compartment (2); A heat dissipation component (5), the heat dissipation component (5) is installed at the bottom of the battery box (1) and is used to reduce the heat generated by the lithium battery (3) during use. The heat dissipation component (5) includes a mounting groove (6), the mounting groove (6) is opened at the bottom of the battery box (1), a guide groove (7) is opened in the battery box (1), the guide groove (7) is communicated with the mounting groove (6), a liquid cooling box (8) is fixedly arranged in the mounting groove (6), the liquid cooling box (8) extends into the battery box (1) through the guide groove (7), and a circulation pipe (9) is fixedly arranged between the liquid cooling boxes (8); and a cover plate (10), the cover plate (10) is detachably arranged on the top of the battery box (1), and the top of the cover plate (10) is provided with heat dissipation fin holes (25), and the heat dissipation fin holes (25) are arranged in a matrix.

2. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: Output pipes (11) are fixedly provided on both sides of the bottom of the liquid cooling box (8) on one side, and a connecting pipe (12) is fixedly provided on the top of the output pipe (11). A long groove (13) is provided on the side of the battery box (1), and a circulating pump (14) is detachably provided in the long groove (13). The liquid inlet and liquid outlet of the circulating pump (14) are respectively fixed to and communicate with the corresponding connecting pipe (12).

3. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: The battery box (1) is provided with a slide groove (15), a PCM interlayer (16) is slidably arranged in the slide groove (15), the PCM interlayer (16) is a high thermal conductivity phase change material, and the PCM interlayer (16) is located between the lithium batteries (3).

4. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: The fixing assembly (4) comprises a rotation groove (17), the rotation groove (17) being provided on one side of the battery box (1), a fixed block (18) being fixedly provided in the rotation groove (17), a rotation plate (19) being rotatably provided between the fixed blocks (18), a clamping block (20) being fixedly provided on the top of the rotation plate (19), a clamping groove (21) being provided on the clamping block (20), a limit block (22) being adapted to the clamping groove (21) being fixedly provided on the other side of the battery box (1), and a slope (26) being provided on the limit block (22).

5. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: A plurality of rubber pads (23) are fixedly provided on the bottom of the rotating plate (19), and the rubber pads (23) are in contact with the lithium battery (3).

6. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: The position of the lithium battery (3) is optimized by thermal coupling simulation and the arrangement of the cells of the lithium battery (3) is optimized.

7. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: The battery box (1) is provided with sliding grooves (27) corresponding to the number of the lithium batteries (3), a sliding block (28) is slidably arranged in the sliding groove (27), an arc groove (29) is provided on the sliding block (28), and the arc groove (29) is adapted to the lithium batteries (3), one end of a first spring (30) is fixedly arranged on both sides of the sliding block (28), and the other end of the first spring (30) is fixedly arranged on the battery box (1).

8. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: A vertical plate (31) is fixedly provided in the battery box (1), the vertical plate (31) is located on both sides of the sliding block (28), a notch (32) is provided on the vertical plate (31), and sliding columns (33) are fixedly provided on both sides of the sliding block (28), the sliding columns (33) are slidably provided with the notch (32).

9. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: The sliding block (28) is provided with at least one limiting groove (34), a limiting plate (35) is slidably arranged in the limiting groove (34), an auxiliary groove (36) is provided on the limiting plate (35), a pressing plate (37) is slidably arranged in the auxiliary groove (36), one end of a second spring (38) is fixedly arranged on the top of the pressing plate (37), and the other end of the second spring (38) is fixedly arranged on the sliding block (28).

10. The lithium battery structure with enhanced heat dissipation performance according to claim 1, characterized in that: A rotating opening (39) is provided on the side of the pressing plate (37), one end of a bent plate (40) is rotatably arranged in the rotating opening (39), the other end of the bent plate (40) is fitted with the limiting plate (35), and a long hole (41) adapted to the bent plate (40) is provided on the side of the sliding block (28).

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