A battery pack

Abstract

The utility model discloses a battery pack relates to lithium battery technical field, wherein, the lithium battery includes box, battery block and first cooling assembly, be equipped with the mounting groove in the box, the battery block is detachably arranged in the mounting groove, the first cooling assembly includes cooling box and cooling coil communication with cooling box, the cooling box is connected with the box, wherein, the cooling coil is around the battery block and sets up, and the cooling coil can absorb the heat of battery block. The utility model provides technical scheme can solve the poor heat dissipation effect of the existing battery pack through the fan heat dissipation problem.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a battery pack. Background Technology

[0002] Lithium-ion batteries, as a highly efficient and rechargeable energy storage technology, possess advantages such as high energy density, long cycle life, low self-discharge rate, and no memory effect, and are widely used in various fields such as smart electronic devices, electric vehicles, industrial equipment, and medical applications. With the booming development of the electric vehicle industry and the ever-increasing demands of various electronic devices on battery range and performance, heat management of battery packs during charging and discharging is becoming increasingly important.

[0003] In the field of lithium-ion battery technology, heat dissipation of battery packs has always been a key factor restricting their performance improvement and widespread application. Currently, fan cooling is a commonly used active cooling method in existing battery pack designs. However, the arrangement of the battery cells within the pack presents many challenges for fan cooling. When the battery cells are closely packed, the gaps between them are extremely small, making it difficult for the airflow generated by the fan to flow smoothly. This results in heat not being effectively dissipated, accumulating continuously inside the battery pack, and causing the battery pack temperature to rise continuously, affecting the battery pack's performance and lifespan. Utility Model Content

[0004] The main purpose of this invention is to propose a battery that aims to solve the problem of poor heat dissipation in existing battery packs that rely on fans for cooling.

[0005] To achieve the above objectives, the present invention proposes a battery pack comprising a housing, a battery block, and a first cooling assembly. The housing is provided with a mounting groove; the battery block is detachably disposed in the mounting groove; the first cooling assembly comprises a cooling box and a cooling coil communicating with the cooling box, the cooling box being connected to the housing; wherein the cooling coil is arranged around the battery block, and the cooling coil is capable of absorbing the heat of the battery block.

[0006] In one embodiment, the first cooling assembly includes a drive pump, the cooling coil has a first connecting pipe and a second connecting pipe communicating with the cooling tank, the drive pump connects the cooling tank and the first connecting pipe, and the drive pump enables the cooling medium in the cooling tank to circulate between the cooling coil and the cooling tank.

[0007] In one embodiment, the first cooling assembly further includes a thermoelectric cooler detachably disposed on the inner wall of the cooling chamber.

[0008] In one embodiment, the cooling box is provided with heat dissipation fins, which are located on the side of the cooling box facing away from the box body.

[0009] In one embodiment, the first cooling assembly further includes a first cooling fan connected to the heat sink, the first cooling fan being located on the side of the heat sink facing away from the cooling box.

[0010] In one embodiment, the battery pack further includes a second cooling assembly, the second cooling assembly having a second cooling fan, the housing having a heat dissipation vent connecting the mounting slot to the outside, the second cooling fan being connected to the housing and blocking the heat dissipation vent, and the second cooling fan being able to exhaust the gas in the mounting slot to the outside.

[0011] In one embodiment, the second cooling assembly further includes a filter screen connected to the inner wall of the mounting slot, the filter screen being located between the battery block and the second cooling fan.

[0012] In one embodiment, the battery pack includes a plurality of battery blocks, each battery block being detachably disposed in the mounting slot, the battery blocks being spaced apart, and a cooling coil being disposed around each battery block, the cooling coil being capable of absorbing heat from each battery block.

[0013] In one embodiment, the first cooling assembly further includes a heat-conducting element, and the heat-conducting element is filled between adjacent battery blocks.

[0014] In one embodiment, the outer wall of the cooling box is provided with a heat dissipation coating.

[0015] This invention provides a battery pack with optimized structure that achieves efficient heat dissipation. Specifically, the battery pack includes a housing, battery cells, and a first cooling assembly. The housing has a mounting slot where the battery cells are detachably installed for easy replacement and maintenance. The first cooling assembly consists of a cooling tank and cooling coils. The cooling tank is connected to the housing, and the cooling coils surround the battery cells. In practical applications, coolant circulates between the cooling tank and the cooling coils, absorbing heat generated by the battery cells and transferring it to the cooling tank, thus effectively dissipating heat from the battery cells. Compared to traditional fan cooling, this solution provides more uniform temperature control within the battery pack, preventing localized overheating and extending battery life. Furthermore, the detachable design of the cooling assembly facilitates maintenance and replacement, further improving the practicality and reliability of the battery pack. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the battery pack provided by this utility model;

[0018] Figure 2 A schematic diagram of another embodiment of the battery pack provided by this utility model;

[0019] Figure 3 Structural schematic diagrams of one or more embodiments of the subject matter provided by this utility model;

[0020] Figure 4 A schematic diagram of a structure of an embodiment of the cooling coil provided by this utility model;

[0021] Figure 5 This is a schematic diagram of another embodiment of the battery pack provided by this utility model.

[0022] Explanation of icon numbers:

[0023] 100. Battery pack; 1. Housing; 1a. Mounting slot; 2. Battery block; 3. First cooling assembly; 31. Cooling box; 32. Cooling coil; 33. Drive pump; 321. First connecting pipe; 322. Second connecting pipe; 34. Semiconductor cooling chip; 311. Heat sink; 35. First cooling fan; 4. Second cooling assembly; 41. Second cooling fan; 1b. Heat dissipation port; 42. Filter screen.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] This utility model proposes a battery pack 100.

[0029] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the battery pack 100 includes a housing 1, a battery block 2, and a first cooling assembly 3. The housing 1 is provided with a mounting groove 1a. The battery block 2 is detachably disposed in the mounting groove 1a. The first cooling assembly 3 includes a cooling box 31 and a cooling coil 32 communicating with the cooling box 31. The cooling box 31 is connected to the housing 1. The cooling coil 32 is arranged around the battery block 2 and can absorb the heat of the battery block 2.

[0030] In this embodiment, to achieve efficient heat dissipation of the battery pack 100, the battery pack 100 includes a housing 1, battery blocks 2, and a first cooling assembly 3. The housing 1 is made of high-strength aluminum alloy or flame-retardant plastic, providing good structural stability. The housing 1 has one or more mounting slots 1a, the size of which is sufficient to fully accommodate the battery blocks 2, while ensuring a mounting gap between the battery blocks 2 and the mounting slots 1a. The cooling tank 31 is installed on one side of the housing 1 by welding or bolting and is connected to the cooling coil 32 via pipes. The cooling coil 32 is made of high thermal conductivity copper alloy or other metal materials, spirally surrounding the outside of each battery block 2, closely adhering to the surface of the battery block 2 to maximize the contact area. The cooling tank 31 contains coolant, which circulates through a built-in micro-pump, carrying away the absorbed heat from the battery pack 100. The entire heat dissipation system is controlled by an intelligent temperature control unit, which automatically adjusts the flow rate of the coolant and the working power of the semiconductor cooling chip 34 according to the real-time temperature of the battery pack 2, ensuring that the battery pack 100 can be kept within the optimal operating temperature range under different operating conditions.

[0031] This invention provides a battery pack 100 with optimized structure, achieving efficient heat dissipation. Specifically, the battery pack 100 includes a housing 1, battery blocks 2, and a first cooling assembly 3. The housing 1 has a mounting groove 1a, in which the battery blocks 2 are detachably installed for easy replacement and maintenance. The first cooling assembly 3 consists of a cooling tank 31 and cooling coils 32. The cooling tank 31 is connected to the housing 1, and the cooling coils 32 surround the battery blocks 2. In practical applications, coolant circulates between the cooling tank 31 and the cooling coils 32, absorbing heat generated by the battery blocks 2 through the cooling coils 32 and transferring it to the cooling tank 31, thus effectively dissipating heat from the battery blocks 2. Compared to traditional fan cooling, this solution can more evenly control the temperature distribution within the battery pack 100, avoiding localized overheating and extending battery life. Furthermore, the detachable design of the cooling assembly facilitates maintenance and replacement, further improving the practicality and reliability of the battery pack 100.

[0032] In one embodiment of this utility model, please refer to Figure 2 , Figure 4 and Figure 5 The first cooling component 3 includes a drive pump 33, and the cooling coil 32 has a first connecting pipe 321 and a second connecting pipe 322 that are connected to the cooling box 31. The drive pump 33 connects the cooling box 31 and the first connecting pipe 321, and the drive pump 33 enables the cooling medium in the cooling box 31 to circulate between the cooling coil 32 and the cooling box 31.

[0033] In one embodiment, to achieve the circulation of the cooling medium between the cooling coil 32 and the cooling tank 31, the cooling coil 32 is made of a highly thermally conductive material (such as copper alloy) and is spirally or coiled around the outside of the battery block 2, closely fitting the surface of the battery block 2 to maximize the contact area and improve heat transfer efficiency. Both ends of the cooling coil 32 are connected to the cooling tank 31 via a first connecting pipe 321 and a second connecting pipe 322, respectively. A drive pump 33 is installed inside the cooling tank 31 or on a pipe connected to the cooling tank 31, with its input end connected to the cooling tank 31 and its output end connected to the first connecting pipe 321. When the drive pump 33 starts, it can draw out the cooling medium (such as coolant) from the cooling tank 31 and pressurize it into the cooling coil 32 through the first connecting pipe 321. After absorbing the heat generated by the battery block 2 in the cooling coil 32, the cooling medium flows back to the cooling tank 31 through the second connecting pipe 322, completing one cycle. In this way, the cooling medium can continuously circulate, quickly carrying away the heat generated by the battery block 2 and achieving efficient heat dissipation. This invention achieves forced circulation of the cooling medium by installing a drive pump 33 between the cooling coil 32 and the cooling tank 31, significantly improving heat dissipation efficiency. Compared with natural convection cooling, forced circulation ensures more thorough heat exchange between the cooling medium and the battery pack 2, preventing heat accumulation in localized areas, thereby effectively reducing the temperature of the battery pack 2 and extending battery life. Furthermore, by adjusting the speed of the drive pump 33, the flow rate of the cooling medium can be flexibly controlled, allowing for dynamic adjustment of the heat dissipation intensity based on the actual operating state and heat dissipation requirements of the battery pack 100, improving the adaptability and flexibility of the heat dissipation system. This design not only meets the heat dissipation requirements of high-power, high-density battery packs 100 but also boasts advantages such as simple structure, reliable operation, and convenient maintenance, making it suitable for various application scenarios.

[0034] In one embodiment of this utility model, please refer to Figure 2 and Figure 5 The first cooling assembly 3 also includes a semiconductor cooling chip 34, which is detachably disposed on the inner wall of the cooling box 31.

[0035] In this embodiment, to further improve the heat dissipation performance of the battery pack 100, a removable thermoelectric cooler 34 is provided on the inner wall of the cooling box 31. The thermoelectric cooler 34 is mounted on the inner wall of the cooling box 31 using thermally conductive adhesive or a dedicated mounting bracket. Its cold end is in direct contact with the cooling medium inside the cooling box 31, while its hot end exchanges heat with the external environment through the side wall of the cooling box 31. The working principle of the thermoelectric cooler 34 is based on the Peltier effect. When current passes through the cooler, the cold end absorbs heat, thereby reducing the temperature of the cooling medium and enhancing the cooling effect. Simultaneously, the removable design of the thermoelectric cooler 34 facilitates maintenance and replacement. Users can flexibly adjust the number of coolers or replace damaged coolers according to actual usage needs, ensuring the long-term stable operation of the heat dissipation system.

[0036] In one embodiment of this utility model, please refer to Figure 2 and Figure 5 The cooling box 31 is provided with heat sink 311, which is located on the side of the cooling box 31 facing away from the box body 1.

[0037] In one embodiment, a heat sink 311 protrudes from the side of the cooling box 31 facing away from the box body 1. The heat sink 311 is made of a high thermal conductivity material (such as aluminum alloy or copper alloy) and is integrally formed with the cooling box 31 through processes such as casting, stamping, or extrusion, or is mechanically fixed to the surface of the cooling box 31. The heat sink 311 is arranged in a fin-like or wavy pattern to increase the contact area with air and promote rapid heat dissipation. In addition, the surface of the heat sink 311 can be anodized or sandblasted to improve its corrosion resistance and aesthetics. In practical applications, the heat sink 311 can be optimized according to the size of the cooling box 31 and the heat dissipation requirements to achieve the best heat dissipation effect. At the same time, the heat sink 311 can also be used in conjunction with the semiconductor cooling chip 34 to accelerate the heat dissipation of the liquid inside the cooling box 31.

[0038] In one embodiment of this utility model, please refer to Figure 2 and Figure 3 The first cooling assembly 3 also includes a first cooling fan 35, which is connected to the heat sink 311 and is located on the side of the heat sink 311 facing away from the cooling box.

[0039] In this embodiment, a first cooling fan 35 is added to the first cooling assembly 3. The first cooling fan 35 is fixed to the side of the heat sink 311 facing away from the cooling box 31 by a bracket, connected to the heat sink 311 or maintained at a certain distance to allow for smooth airflow. The size and airflow of the cooling fan are selected according to the heat dissipation requirements of the cooling box 31 to ensure that the heat dissipated by the heat sink 311 can be effectively and quickly removed. The cooling fan can be driven by a built-in motor, and the motor speed can be adjusted according to the temperature changes inside the cooling box 31 to achieve dynamic heat dissipation control. In addition, the cooling fan can also be equipped with a temperature sensor and connected to the control unit of the cooling system to achieve intelligent heat dissipation management and further improve heat dissipation efficiency. This utility model significantly enhances the heat dissipation performance of the cooling system by setting a first cooling fan 35 on the side of the heat sink 311 facing away from the cooling box 31. The active airflow of the cooling fan can accelerate the airflow around the heat sink 311, quickly dissipate heat to the surrounding environment, thereby effectively reducing the temperature inside the cooling box 31 and further improving the efficiency of the entire heat dissipation system. Furthermore, the dynamic adjustment function of the cooling fan can automatically adjust the airflow according to actual heat dissipation needs, ensuring heat dissipation effect while avoiding unnecessary energy consumption and improving the system's energy efficiency ratio. This design not only improves the heat dissipation performance of the battery pack 100 but also enhances the system's reliability and lifespan, making it particularly suitable for high-power and high-density battery pack 100 heat dissipation scenarios.

[0040] In one embodiment of this utility model, please refer to Figure 2 and Figure 3 The battery pack 100 also includes a second cooling component 4, which has a second cooling fan 41. The housing 1 has a heat dissipation vent 1b that connects the mounting slot 1a to the outside. The second cooling fan 41 is connected to the housing 1 and blocks the heat dissipation vent 1b. The second cooling fan 41 can exhaust the gas in the mounting slot to the outside.

[0041] In one embodiment, a second cooling component 4 is added to the battery pack 100. The second cooling component 4 includes a second cooling fan 41. A heat dissipation vent 1b is provided on the side wall of the housing 1, directly connecting the mounting slot 1a to the external environment, providing a direct exhaust channel for heat inside the battery pack 100. The second cooling fan 41 is mounted on the outside of the housing 1 via a fixed bracket, facing the heat dissipation vent 1b and completely blocking it. The size and airflow of the cooling fan are precisely calculated to ensure efficient extraction and exhaust of hot air from the mounting slot to the outside. Furthermore, the cooling fan can be speed-adjusted according to the temperature changes of the battery pack 100 via an intelligent control system to achieve on-demand cooling, further optimizing the heat dissipation effect and reducing energy consumption. By setting the second cooling component 4 in the battery pack 100, the heat dissipation capacity of the battery pack 100 is significantly enhanced. The second cooling fan 41 can actively extract and exhaust hot air from the mounting slot to the outside, effectively preventing heat accumulation inside the battery pack 100, thereby reducing the operating temperature of the battery block 2 and extending the battery's lifespan. Meanwhile, the placement of heat dissipation vent 1b provides a direct channel for heat dissipation, further improving heat dissipation efficiency.

[0042] In one embodiment of this utility model, please refer to Figure 2 and Figure 3 The second cooling assembly 4 also includes a filter screen 42, which is connected to the inner wall of the mounting groove 1a and is located between the battery block 2 and the second cooling fan 41.

[0043] In this embodiment, to protect the battery pack 2 from dust and impurities while dissipating heat, a filter 42 is added to the second cooling assembly 4. The filter 42 is made of a highly breathable, low-resistance material (such as non-woven fabric or microporous metal mesh) and is fixed to the inner wall of the mounting groove 1a by clips, screws, or adhesive, located between the battery pack 2 and the second cooling fan 41. The pore size of the filter 42 is optimized to effectively block dust, particles, insects, and other impurities from entering the battery pack 100 without causing excessive resistance to airflow, ensuring the cooling fan can operate normally. Furthermore, the filter 42 is designed for easy disassembly and cleaning to ensure its long-term effective filtration performance.

[0044] In one embodiment of this utility model, please refer to Figure 2 and Figure 3 The battery pack 100 includes multiple battery blocks 2, each battery block 2 is detachably disposed in the mounting slot 1a, each battery block 2 is spaced apart, and a cooling coil 32 is disposed around each battery block 2, the cooling coil 32 is capable of absorbing the heat of each battery block 2.

[0045] In one embodiment, to achieve efficient heat dissipation and flexible maintenance of the battery pack 100, this invention designs a battery pack 100 structure comprising multiple battery blocks 2. Each battery block 2 is detachably installed in a mounting slot 1a within the housing 1. The dimensions of the mounting slot 1a precisely match the battery block 2, ensuring that the battery block 2 can be placed stably. To optimize heat dissipation, a certain distance is maintained between adjacent battery blocks 2 to avoid heat accumulation. Simultaneously, the cooling coil 32 is made of a highly thermally conductive material (such as copper alloy) and spirals or coils around the outside of each battery block 2, closely adhering to the surface of the battery block 2 to maximize the contact area and improve heat conduction efficiency. The two ends of the cooling coil 32 are connected to the cooling box 31 via pipes, forming a complete cooling medium circulation loop. The cooling medium circulates under the action of the drive pump 33, absorbing and carrying away the heat generated by the battery blocks 2, ensuring that each battery block 2 receives effective heat dissipation.

[0046] In one embodiment of this utility model, please refer to Figure 2 The first cooling component 3 also includes a heat-conducting element, and the space between adjacent battery blocks 2 is filled with a heat-conducting element.

[0047] In this embodiment, a heat-conducting element is added to the first cooling assembly 3. The heat-conducting element is made of a high thermal conductivity material (such as thermally conductive silicone, thermally conductive gel, or aluminum alloy) and fills the gaps between adjacent battery blocks 2. The shape and size of the heat-conducting element are customized according to the arrangement and spacing of the battery blocks 2 to ensure complete filling of the gaps between the battery blocks 2 while avoiding interference with the installation and removal of the battery blocks 2. The heat-conducting element has a high thermal conductivity, enabling rapid conduction of heat generated by the battery blocks 2 to the cooling coil 32 or other heat dissipation components, thereby achieving efficient thermal management. Furthermore, the heat-conducting element also has a certain degree of elasticity or flexibility, which can act as a buffer when the battery pack 100 is subjected to mechanical impact, protecting the battery blocks 2 from damage. This invention significantly enhances the heat dissipation effect of the battery pack 100 by filling the gaps between adjacent battery blocks 2 with a heat-conducting element. The high thermal conductivity of the heat-conducting element enables rapid conduction of heat generated by the battery blocks 2 to the cooling coil 32 or other heat dissipation components, further optimizing the heat dissipation path, preventing heat accumulation between the battery blocks 2, thereby effectively reducing the operating temperature of the battery blocks 2 and extending the battery's lifespan. Furthermore, the buffering effect of the heat-conducting components can improve the mechanical stability of the battery pack 100 and enhance its reliability under complex operating conditions. This design is particularly suitable for high-power, high-density battery pack 100 heat dissipation scenarios, and can effectively ensure the stable operation of the battery pack 100 under various operating conditions.

[0048] In one embodiment of this utility model, please refer to Figure 3 The outer wall of the cooling box 31 is provided with a heat dissipation coating.

[0049] In one embodiment, to further improve the heat dissipation efficiency of the cooling box 31, a heat dissipation coating is applied to the outer wall of the cooling box 31. The heat dissipation coating is made of a material with high thermal conductivity and high emissivity, such as a composite coating containing nanoscale metal oxides (e.g., aluminum oxide, copper oxide). It is uniformly applied to the outer wall of the cooling box 31 by spraying or brushing, with a coating thickness typically between 0.1 and 0.5 mm to ensure good heat dissipation performance. The heat dissipation coating not only improves the thermal conductivity of the cooling box 31 surface but also rapidly dissipates heat to the surrounding environment through radiation. Furthermore, the heat dissipation coating also possesses certain corrosion resistance and wear resistance, extending the service life of the cooling box 31.

[0050] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery pack, characterized in that, include: The housing (1) has an installation groove (1a) inside. Battery block (2), said battery block (2) being detachably disposed in said mounting slot (1a); and The first cooling assembly (3) includes a cooling box (31) and a cooling coil (32) communicating with the cooling box (31), wherein the cooling box (31) is connected to the box body (1); The cooling coil (32) is arranged around the battery block (2), and the cooling coil (32) can absorb the heat of the battery block (2).

2. The battery pack as described in claim 1, characterized in that, The first cooling assembly (3) includes a drive pump (33), and the cooling coil (32) has a first connecting pipe (321) and a second connecting pipe (322) communicating with the cooling tank (31). The drive pump (33) connects the cooling tank (31) and the first connecting pipe (321), and the drive pump (33) enables the cooling medium in the cooling tank (31) to circulate in the cooling coil (32) and the cooling tank (31).

3. The battery pack as described in claim 2, characterized in that, The first cooling assembly (3) further includes a semiconductor cooling chip (34), which is detachably disposed on the inner wall of the cooling box (31).

4. The battery pack as described in claim 1, characterized in that, The cooling box (31) is provided with heat sinks (311), and the heat sinks (311) are located on the side of the cooling box (31) facing away from the box body (1).

5. The battery pack as described in claim 4, characterized in that, The first cooling assembly (3) further includes a first cooling fan (35), which is connected to the heat sink (311) and is located on the side of the heat sink (311) facing away from the cooling box (31).

6. The battery pack as described in any one of claims 1 to 5, characterized in that, The battery pack also includes a second cooling component (4), which has a second cooling fan (41). The housing (1) has a heat dissipation port (1b) that connects the mounting slot (1a) to the outside. The second cooling fan (41) is connected to the housing (1) and blocks the heat dissipation port (1b). The second cooling fan (41) can exhaust the gas in the mounting slot to the outside.

7. The battery pack as described in claim 6, characterized in that, The second cooling assembly (4) further includes a filter screen (42) connected to the inner wall of the mounting groove (1a) and located between the battery block (2) and the second cooling fan (41).

8. The battery pack as described in any one of claims 1 to 5, characterized in that, The battery pack includes a plurality of battery blocks (2), each of which is detachably disposed in the mounting slot (1a). Each of the battery blocks (2) is spaced apart, and the cooling coil (32) is disposed around each of the battery blocks (2). The cooling coil (32) is capable of absorbing the heat of each of the battery blocks (2).

9. The battery pack as described in claim 8, characterized in that, The first cooling component (3) also includes a heat-conducting element, and the heat-conducting element is filled between adjacent battery blocks (2).

10. The battery pack as described in any one of claims 1 to 5, characterized in that, The outer wall of the cooling box (31) is provided with a heat dissipation coating.

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