Battery pack

Abstract

The utility model discloses a battery pack which comprises a box body, an adjusting assembly and a plurality of battery cell modules, the box body is provided with a containing cavity, an air inlet and an air outlet, the air inlet and the air outlet are formed in the two opposite ends of the box body and communicated with the containing cavity, the battery cell modules are arranged in the containing cavity, and the adjusting assembly comprises at least two moving parts and at least two supports. The at least two moving parts are fixed to the two opposite ends of the battery cell modules, the at least two supports are arranged at the two opposite ends in the containing cavity in the first direction, the supports extend in the second direction, the moving parts are movably connected with the supports and used for adjusting the distance between the multiple battery cell modules in the second direction, the first direction is the direction from the air inlet to the air outlet, and the second direction is the direction from the air outlet to the air outlet. The second direction is perpendicular to the first direction, and the technical problem that the heat dissipation effect of an existing air-cooled battery system cannot be adjusted according to requirements is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery heat dissipation technical field especially relates to a battery pack. BACKGROUND

[0002] A large amount of heat is generated in the charging and discharging process of the battery, and if it cannot be effectively dissipated in time, it may lead to performance degradation, shortened life, and even safety problems. With the development of energy storage equipment, higher requirements are put forward for the heat dissipation management of the battery system.

[0003] At present, the air-cooled heat dissipation system is widely used in battery applications. This system usually sets up a single-direction air duct to introduce cold air into the battery pack to achieve heat dissipation. However, the existing air-cooled battery system usually adopts a fixed structure, and the cooling effect is limited by the preset air duct design, and cannot be flexibly adjusted according to the changes of the battery operating state and environmental temperature. For example, in the case of high-power operation of the battery or high environmental temperature, the cooling capacity of the fixed air duct may be insufficient, leading to overheating of the battery.

[0004] Therefore, how to adjust the heat dissipation effect of the air-cooled heat dissipation system according to the heat dissipation requirements under different working conditions has become a problem to be solved. UTILITY MODEL CONTENTS

[0005] One purpose of the utility model is to provide a battery pack, which aims to solve the technical problem that the existing air-cooled battery system cannot adjust the heat dissipation effect according to the requirements.

[0006] To achieve the above purpose, the utility model provides a scheme: a battery pack, the battery pack includes a box body, an accommodating cavity is opened, and an air inlet and an air outlet are arranged at opposite ends of the box body and are communicated with the accommodating cavity; a plurality of battery cell modules are arranged in the accommodating cavity; an adjusting assembly includes at least two moving pieces and at least two supports, the at least two moving pieces are fixed at opposite ends of the battery cell modules, the at least two supports are arranged at opposite ends in the accommodating cavity along a first direction, and the supports extend along a second direction, the moving pieces are movably connected with the supports, and are used for adjusting the spacing of the plurality of battery cell modules along the second direction; wherein the first direction is from the air inlet to the air outlet, and the second direction is perpendicular to the first direction.

[0007] Optionally, the support is provided with a plurality of mounting holes along the second direction, the moving piece is provided with a through hole, the moving piece is connected with at least one of the mounting holes through the through hole and the fixing piece to fix the spacing between the battery cell modules.

[0008] Optionally, the support is provided with an adjusting groove along the second direction, the moving piece is provided with a through hole, and the adjusting assembly further includes a fastener, the fastener passes through the through hole and is slidably connected with the adjusting groove to freely adjust the spacing between the battery cell modules.

[0009] Optionally, the fastener includes a sliding end and a locking end opposite to each other, and a connecting shaft connecting the sliding end and the locking end. The sliding end is embedded in an adjustment groove and is slidably connected to the bracket. The locking part is threadedly connected to the connecting shaft. The tightness of the sliding end and the bracket is adjusted to control the movement and fixation of the moving part.

[0010] Optionally, the adjustment assembly also includes a fixing plate, which is mounted between at least two movable parts and connects the at least two movable parts. The fixing plate is attached to the side or bottom of the battery cell module.

[0011] Optionally, the fixing plate has a cavity filled with coolant or phase change material.

[0012] Optionally, the battery cell module includes multiple battery cells arranged along its thickness direction, the thickness direction of the battery cells being the same as the second direction, and movable members being disposed at both ends of the battery cells along the first direction. The movable members are respectively connected to the multiple battery cells, and the multiple battery cells can move closer to or further away from each other.

[0013] Optionally, the movable component includes multiple interconnected connecting assemblies; each connecting assembly includes a first rod and a second rod, which are rotatably connected to each other, and the two ends of the first rod are rotatably connected to the ends of the second rod in the adjacent connecting assembly; multiple battery cells are respectively connected to the connection points of the first rod and the second rod in the connecting assembly, and the line connecting the multiple connection points is parallel to the second direction.

[0014] Optionally, the movable component also includes an adjusting rod, which is connected to the connecting assembly. The housing has a clearance groove, one end of which is slidably connected to the bracket, and the other end extends out of the clearance groove to adjust the distance between multiple cells.

[0015] Optionally, the number of air outlets is at least two, and they are spaced apart on the housing along a second direction.

[0016] Optionally, the battery pack also includes a fan, which is connected to the housing and has its air inlet covered.

[0017] The beneficial effects of this utility model are as follows:

[0018] Compared with existing technologies, this invention achieves the adjustment of the internal airflow of the battery pack by introducing an adjustment component, taking into account the flexible adaptability of the battery pack in scenarios with high and low heat dissipation requirements. When the heat dissipation requirement of the battery pack is high, the adjustment component creates gaps between the cell modules, increasing the contact area between the airflow and the surface of the cell modules, and significantly improving the heat dissipation efficiency of the battery pack. When the heat dissipation requirement of the battery pack is low, the adjustment component makes the cell modules fit together, reducing unnecessary airflow and ineffective heat dissipation structures, and achieving higher space utilization and overall performance optimization.

[0019] This invention improves the thermal management capability and adaptability of the battery pack. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is an overall schematic diagram of the battery pack provided in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0023] Figure 3 This is a top view of the battery pack provided in an embodiment of the present utility model;

[0024] Figure 4 This is provided by the embodiment of the present utility model. Figure 3 Cross-sectional view along the AA direction;

[0025] Figure 5 This is provided by the embodiment of the present utility model. Figure 3 Cross-sectional view along the BB direction;

[0026] Figure 6 This is a cell module distribution diagram provided in an embodiment of the present invention;

[0027] Figure 7 This is another battery cell module distribution diagram provided in this embodiment of the utility model;

[0028] Figure 8 This is a cross-sectional view of another adjustment component provided in an embodiment of the present utility model;

[0029] Figure 9 This is a schematic diagram of a bracket for another adjustment component provided in an embodiment of the present utility model;

[0030] Figure 10 This is a schematic diagram of another adjustment component provided in an embodiment of the present invention;

[0031] Figure 11 This is a cross-sectional view of the fixing plate provided in an embodiment of the present utility model;

[0032] Figure 12 This is a schematic diagram of the first state of another battery pack provided in an embodiment of the present invention;

[0033] Figure 13 This is a schematic diagram of the second state of another battery pack provided in an embodiment of the present invention.

[0034] Explanation of icon numbers:

[0035] 10. Housing; 11. Receiving cavity; 12. Air inlet; 13. Air outlet; 14. Clearance groove; 20. Battery cell module; 21. Battery cell; 30. Adjustment component; 31. Moving part; 311. Through hole; 312. Connecting component; 3121. First rod; 3122. Second rod; 313. Adjustment rod; 32. Bracket; 321. Mounting hole; 322. Adjustment groove; 33. Fastener; 331. Sliding end; 332. Locking end; 333. Connecting shaft; 34. Fixing plate; 341. Cavity; 40. Fan. Detailed Implementation

[0036] 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 protection scope of the present utility model.

[0037] Please see Figure 1 and Figure 2 , Figure 1 This is an overall schematic diagram of the battery pack provided in this embodiment of the utility model. Figure 2 This is a schematic diagram of the battery pack provided in an embodiment of the present invention.

[0038] This utility model provides a battery pack, including a housing 10, an adjustment assembly 30, and multiple battery cell modules 20. The housing 10 includes a receiving cavity 11, and air inlets 12 and air outlets 13 respectively disposed at opposite ends of the housing 10, both of which are connected to the receiving cavity 11. The multiple battery cell modules 20 are disposed in the receiving cavity 11 for providing electrical energy output.

[0039] Please see Figures 3 to 5 , Figure 3 This is a top view of the battery pack provided in an embodiment of the present invention. Figure 4 This is provided by the embodiment of the present utility model. Figure 3 Cross-sectional view along the AA direction. Figure 5 This is provided by the embodiment of the present utility model. Figure 3 Cross-sectional view along the BB direction.

[0040] The adjustment assembly 30 includes at least two movable members 31 and at least two brackets 32, which are illustrated in this embodiment as two. The movable members 31 are fixed to the opposite ends of the battery cell module 20, forming a stable connection. The brackets 32 are arranged at the opposite ends of the receiving cavity 11 along a first direction (i.e., the direction from the air inlet 12 to the air outlet 13) and extend along a second direction (perpendicular to the first direction). The movable members 31 are movably connected to the brackets 32, allowing them to be adjusted in position in the second direction, thereby enabling adjustment of the spacing between the multiple battery cell modules 20 in the second direction. Figure 2 In the middle, direction A is the first direction, and direction B is the second direction.

[0041] In this embodiment, by adding an adjustment component 30, the moving part 31 fixes the entire battery cell module 20, and the moving part 31 is movably connected to the bracket 32 ​​to realize position adjustment in the second direction, thereby realizing flexible adjustment of the spacing between the battery cell modules 20. The movement of the moving part 31 on the bracket 32 ​​makes the gap between the battery cell modules 20 change according to the requirements.

[0042] Please see Figure 6 and Figure 7 , Figure 6 This is a distribution diagram of a battery cell module 20 provided in an embodiment of the present invention. Figure 7 This is another distribution diagram of the battery cell module 20 provided in this embodiment of the utility model.

[0043] When gaps are created between the battery cell modules 20, since the second direction is perpendicular to the airflow direction in the battery pack, these gaps are equivalent to adding air ducts in the battery pack. This helps to increase the contact area between the airflow and the surface of the battery cell module 20, significantly improving the heat dissipation efficiency of the battery pack. Furthermore, when the heat dissipation requirements of the battery pack are low, the battery cell modules 20 can be brought closer together by adjusting the moving part 31, thereby reducing unnecessary air ducts and ineffective heat dissipation structures, achieving higher space utilization and overall performance optimization.

[0044] In some embodiments, the bracket 32 ​​has a plurality of spaced mounting holes 321 along a second direction (perpendicular to the first direction from the air inlet 12 to the air outlet 13). Each mounting hole 321 is used to cooperate with the movable member 31 to achieve position adjustment. Simultaneously, the movable member 31 has through holes 311 corresponding to the mounting holes 321. When it is necessary to adjust the spacing between the battery cell modules 20, a fixing member (such as a bolt, pin, etc.) can pass through the through hole 311 of the movable member 31 and the mounting hole 321 of the bracket 32, thereby achieving a fixed connection between the movable member 31 and the bracket 32, thus determining the installation position and relative spacing of the battery cell modules 20.

[0045] In this embodiment, the position and spacing of the mounting holes 321 on the bracket 32 ​​are pre-planned during the design phase to ensure the accuracy and stability of the adjustment operation. By selecting different mounting holes 321 for connection, the gap between the cell modules 20 can be precisely adjusted according to actual heat dissipation requirements or space requirements. Through modular adjustment design, this utility model can flexibly respond to the heat dissipation requirements and space layout requirements of different application scenarios without changing the overall structure of the battery pack, significantly improving the applicability and thermal management performance of the battery pack.

[0046] Please see Figure 8 and Figure 9 , Figure 8 This is a cross-sectional view of another adjustment component 30 provided in this embodiment of the present invention. Figure 9 This is a schematic diagram of the bracket 32 ​​of another adjustment component 30 provided in this embodiment of the present utility model.

[0047] In some embodiments, the bracket 32 ​​has one or more extending adjustment slots 322 along a second direction (perpendicular to the first direction from the air inlet 12 to the air outlet 13). The adjustment slots 322 are typically elongated to facilitate sliding adjustment. The cooperating movable member 31 has one or more through holes 311. The adjustment assembly 30 also includes a fastener 33, which passes through the through holes 311 of the movable member 31 and is slidably connected to the adjustment slots 322 of the bracket 32, thereby enabling flexible adjustment of the position of the movable member 31.

[0048] In this embodiment, the movable member 31 can slide freely to the desired position within the adjustment groove 322 of the bracket 32. Due to the continuity of the adjustment groove 322, the movable member 31 can move smoothly within the entire length of the adjustment groove 322, thereby achieving stepless adjustment. This avoids the spacing limitation of the traditional fixed mounting holes 321, making the spacing adjustment between the battery cell modules 20 more flexible and able to be precisely set according to actual application requirements.

[0049] When the battery pack requires higher heat dissipation efficiency, the gap between the cell modules 20 can be appropriately increased to form a wider airflow channel, enhance air circulation, and improve heat exchange efficiency. Conversely, when the heat dissipation requirement is lower or a more compact structure is required, the cell modules 20 can be arranged closely to reduce unnecessary airflow space and optimize the overall size and weight.

[0050] Furthermore, the fastener 33 includes a sliding end 331 and a locking end 332, which are connected together by a connecting shaft 333. The sliding end 331 is adapted to the adjustment groove 322 of the bracket 32, can be embedded therein, and forms a sliding connection with the bracket 32. Through the sliding connection, the sliding end 331 can move freely within the adjustment groove 322, thereby allowing the spacing between the battery cell modules 20 to be precisely adjusted as needed. The other end of the connecting shaft 333 is the locking end 332, which is threadedly connected to the connecting shaft 333 and can play a locking role during adjustment.

[0051] In this embodiment, the user can adjust the tightness between the sliding end 331 and the bracket 32 ​​by rotating the locking end 332. When it is necessary to adjust the position of the moving part 31, simply loosen the locking end 332, and the sliding end 331 can slide freely in the adjustment groove 322, and the distance between the moving parts 31 will change accordingly. After the moving part 31 is adjusted to the desired position, the user can tighten the locking end 332 to press the sliding end 331 and fix it in the adjustment groove 322 of the bracket 32, thereby stably locking the position of the moving part 31 and preventing it from loosening or shifting during use.

[0052] The design of the fastener 33 is flexible and operable, which is especially important in applications where the spacing between the battery cell modules 20 needs to be frequently adjusted. Adjusting the tightness of the sliding end 331 and the bracket 32 ​​can precisely control the sliding and fixing state of the moving part 31, while meeting different heat dissipation requirements or space layout requirements, and maintaining the stability and reliability of the structure.

[0053] Please see Figure 10 , Figure 10 This is a schematic diagram of another adjustment component 30 provided in this embodiment of the present invention.

[0054] In some embodiments, the adjustment assembly 30 further includes a fixing plate 34, which is mounted between and connects at least two movable members 31. The fixing plate 34 can also fit tightly against the side or bottom surface of the battery cell module 20. By connecting the fixing plate 34 to the battery cell module 20 and the movable members 31, the fixing plate 34 reinforces the connection during adjustment, making the relationship between the battery cell module 20 and the movable members 31 more secure, ensuring synchronous movement and preventing separation or misalignment between the battery cell module 20 and the movable members 31.

[0055] In this embodiment, the fixing plate 34 improves the stability and reliability of the overall battery pack structure. Without the fixing plate 34, slippage may occur between the moving part 31 and the cell module 20 due to asynchrony or uneven friction, especially during adjustment, where relative displacement may occur between the cell module 20 and the moving part 31, causing unstable heat dissipation performance and even affecting the safety of the battery pack. The fixing plate 34 ensures that the cell module 20 and the moving part 31 always move synchronously during adjustment, avoiding connection failure.

[0056] In addition, the fixing plate 34 also serves to enhance the side or bottom support of the battery cell module 20, further strengthening the battery pack's shock resistance and deformation resistance under external forces that may be applied during operation. Through the contact between the fixing plate 34 and the battery cell module 20, it ensures that the battery cell module 20 remains fixed after adjustment, preventing displacement of the module position due to changes in external factors, thus avoiding potential thermal runaway or mechanical failure.

[0057] Further, please refer to Figure 11 , Figure 11 This is a cross-sectional view of the fixing plate 34 provided in this embodiment of the utility model. To further improve the heat dissipation performance of the battery pack, the fixing plate 34 has one or more cavities 341, which are filled with coolant or phase change material. The coolant or phase change material filled in the cavities 341 of the fixing plate 34 can effectively absorb the heat generated by the cell module 20 during the operation of the battery pack.

[0058] Specifically, the coolant has high thermal conductivity, which can quickly remove heat from the surface of the cell module 20, reducing its temperature and thus preventing the battery from overheating and ensuring the safe operation of the battery pack. Phase change materials, on the other hand, have the characteristic of undergoing a phase change at a specific temperature (such as from solid to liquid or from liquid to gas). During the phase change process, they can absorb a large amount of heat, thus buffering heat changes and balancing temperature fluctuations when there are large temperature fluctuations.

[0059] In this embodiment, the fixing plate 34 not only reinforces the connection between the cell module 20 and the moving part 31, but also effectively participates in the heat dissipation of the battery pack. Through the action of coolant or phase change material, it effectively absorbs heat and alleviates temperature fluctuations, playing an auxiliary role in the heat dissipation process of the battery pack. This effectively improves the stability of the battery pack under high load and high temperature environments, extends the battery's service life, and reduces potential safety hazards caused by overheating.

[0060] Please see Figure 12 and Figure 13 , Figure 12 This is a schematic diagram of the first state of another battery pack provided in an embodiment of this utility model. Figure 13This is a schematic diagram of the second state of another battery pack provided in an embodiment of the present invention.

[0061] In some embodiments, the battery module 20 includes a plurality of battery cells 21 arranged along its thickness direction, and the thickness direction of the plurality of battery cells 21 is the same as the second direction. In conjunction with the arrangement of the battery cells 21, movable members 31 are disposed at both ends of the battery module 20 along the first direction, and the movable members 31 are respectively connected to the plurality of battery cells 21, allowing the plurality of battery cells 21 to move closer to or further away from each other, thereby achieving the effect of adjusting the gap between the battery cells 21 in the battery module 20.

[0062] Specifically, multiple battery cells 21 are moved closer together or further apart in the second direction, adjusting the gaps between them and changing the airflow layout accordingly. When gaps are created between the cells 21, it's equivalent to creating more airflow channels, allowing for freer airflow and significantly increasing the contact area between the air and the cell surface, thereby greatly improving heat exchange efficiency and enhancing the battery pack's heat dissipation. Conversely, when heat dissipation requirements are lower, the gaps between the cells 21 can be reduced, further improving the system's space utilization while avoiding unnecessary airflow and optimizing structural compactness.

[0063] In this embodiment, in addition to adjusting the gap between the cell modules 20, the gap between the cells 21 inside the cell module 20 is also adjusted. By adjusting the gap between the cells 21 in the cell module 20 through the function of the adjustment component 30, more air channels can be formed, increasing the airflow path and effectively removing the heat generated by the cell module 20, thereby greatly improving the battery's load-bearing capacity and enabling it to work stably under high load or large temperature changes.

[0064] Furthermore, to achieve gap adjustment between the cells 21 in the cell module 20, the specific design of the adjustment component 30 may include multiple interconnected connection components 312. Each connection component 312 consists of a first rod 3121 and a second rod 3122, which are rotatably connected together. The two ends of the first rod 3121 are rotatably connected to the ends of the second rod 3122 in the adjacent connection component 312.

[0065] In this structure, when the distance between the connection points of the first rod 3121 and the second rod 3122 in two adjacent connecting components 312 changes, it will synchronously drive the change in the distance between the connection points of the first rod 3121 and the second rod 3122 in all connecting components 312. By connecting multiple battery cells 21 to the connection points of the first rod 3121 and the second rod 3122 in the connecting components 312 respectively, since the connection line is parallel to the second direction, the gap between the battery cells 21 in the battery cell module 20 can be adjusted in the second direction, allowing the gap between multiple battery cells 21 to change synchronously, thereby effectively adjusting the airflow.

[0066] In this embodiment, multiple connecting components 312 are interconnected to form multiple rhomboid structures. The endpoints of the lines connecting each rhomboid structure that are parallel to the second direction are connected to the battery cell 21. Due to the parallelogram instability of the rhomboid structure, when the spacing between a pair of adjacent endpoints changes, the spacing between all endpoints will change accordingly. Utilizing this characteristic, the synchronous approach or distance of all battery cells 21 in the entire battery cell module 20 can be achieved by adjusting the positions of two endpoints. Adjusting the gap between the battery cells 21 can increase the heat exchange area of ​​the battery cells 21, significantly improving heat exchange efficiency.

[0067] Furthermore, the movable component 31 also includes an adjusting rod 313, which is connected to multiple connecting components 312 to form an integrated adjusting system. Specifically, the housing 10 has a clearance groove 14. One end of the adjusting rod 313 is slidably connected to the bracket 32, and the other end extends out of the clearance groove 14, allowing the adjusting rod 313 to slide freely within the housing 10 and facilitating direct adjustment from outside the battery pack. The adjusting rod 313 allows users to conveniently adjust the distance between the cells 21 in the cell module 20 through external operation, thereby optimizing heat dissipation performance.

[0068] In this embodiment, due to the connection between the adjusting rod 313 and the connecting component 312, the sliding action of the adjusting rod 313 will synchronously drive the connecting component 312, thereby adjusting the spacing between the multiple battery cell modules 20. When the adjusting rods 313 slide away from each other, gaps are generated or the gaps between the battery cells 21 become larger, forming a wider airflow channel, thereby improving the heat dissipation effect; conversely, when the adjusting rods 313 slide towards each other, the gaps between the battery cell modules 20 shrink or disappear, reducing the area of ​​the airflow channel, thereby improving the compactness of the structure and adapting to different heat dissipation requirements.

[0069] The sliding control of the adjustment lever 313 makes adjustment easier. Users can adjust the gap of the battery cells 21 using the external adjustment lever 313 without opening the battery pack or disassembling internal components. This is particularly suitable for applications that require frequent adjustments to the heat dissipation mode or optimization of heat dissipation efficiency based on changes in the usage environment.

[0070] In some embodiments, the battery pack has at least two air outlets 13, and these air outlets 13 are spaced apart on the housing 10 along a second direction (perpendicular to the first direction from the air inlet 12 to the air outlet 13). By providing multiple air outlets 13, the battery pack can achieve more uniform and efficient airflow, thereby improving the overall heat dissipation performance.

[0071] In this embodiment, the number and layout of the air outlets 13 not only help balance the airflow inside the housing 10, but also provide flexible airflow control under different heat dissipation requirements. Since the battery pack can adjust its airflow according to heat dissipation needs, creating airflow channels at different locations within the housing 11, the multiple air outlets 13 spaced apart along the second direction can adapt to adjustments in the airflow channels within the battery pack, avoiding airflow interference and backflow, and ensuring unobstructed heat dissipation channels. The multiple air outlets 13 also effectively share the exhaust workload, maintaining a balanced airflow and preventing heat accumulation in localized areas, thereby reducing safety risks caused by localized overheating.

[0072] Furthermore, the battery pack also includes a fan 40, which is fixedly connected to the housing 10 and effectively covers the air inlet 12. The introduction of the fan 40 is mainly to enhance airflow inside the battery pack and improve heat dissipation efficiency. By forcing airflow, the fan 40 can create a stronger airflow inside the battery pack, carrying away heat from the battery modules and other components, ensuring that the battery pack will not experience performance degradation or safety hazards due to overheating when operating under high load.

[0073] In this embodiment, the airflow inside the battery pack is drawn in through the air inlet 12 by the fan 40, and after heat exchange with the cell module 20, the cooling system, and other components, it is discharged from multiple air outlets 13. The fan 40 increases the amount of air exchange within the housing 10 by accelerating airflow, and the fan 40's cover on the air inlet 12 makes the direction and pressure of airflow more precise. The introduction of the fan 40 also helps to create a negative pressure environment inside the battery pack, prompting cool air to enter the housing 10 through the air inlet 12 and enhancing the airflow of the entire cooling system.

[0074] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0075] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0076] Furthermore, the use of terms such as "first" and "second" in this utility model is 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0077] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using 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 by, The battery pack comprises: a box body, which is provided with a receiving cavity, an air inlet and an air outlet arranged at opposite ends of the box body and connected with the receiving cavity; a plurality of battery cell modules arranged in the receiving cavity; an adjusting assembly, which comprises at least two moving members and at least two supports, the at least two moving members are fixed at opposite ends of the battery cell modules, the at least two supports are arranged at opposite ends of the receiving cavity along a first direction, and the supports extend along a second direction, the moving members are movably connected with the supports, and are used for adjusting the spacing of the plurality of battery cell modules along the second direction; wherein the first direction is from the air inlet to the air outlet, and the second direction is perpendicular to the first direction.

2. The battery pack of claim 1, wherein, The supports are provided with a plurality of mounting holes along the second direction, the moving members are provided with through holes, and the moving members are connected with at least one of the mounting holes and the through holes through a fixing member to fix and adjust the spacing between the battery cell modules.

3. The battery pack of claim 1, wherein, The supports are provided with adjusting grooves along the second direction, the moving members are provided with through holes, and the adjusting assembly further comprises a fastener, the fastener passes through the through holes and is slidably connected with the adjusting grooves to freely adjust the spacing between the battery cell modules.

4. The battery pack of claim 3, wherein, The fastener comprises opposite sliding ends and locking ends, and a connecting shaft connecting the sliding ends and the locking ends, the sliding ends are embedded in the adjusting grooves and slidably connected with the supports, the locking ends are threadedly connected with the connecting shaft, and the tightness of the sliding ends and the supports is adjusted to control the movement and fixation of the moving members.

5. The battery pack of claim 1, wherein, The adjusting assembly further comprises a fixed plate arranged between the at least two moving members and connecting the at least two moving members, the fixed plate is attached to the side surface or the bottom surface of the battery cell modules.

6. The battery pack of claim 5, wherein, The fixed plate is provided with a cavity, and the cavity is filled with cooling liquid or phase change material.

7. The battery pack of claim 1, wherein, The battery cell module comprises a plurality of battery cells arranged along the thickness direction of the battery cell module, the thickness direction of the battery cell module is the same as the second direction, the moving members are arranged at both ends of the battery cell module along the first direction, the moving members are respectively connected with the plurality of battery cells, and the plurality of battery cells can move close to or away from each other.

8. The battery pack of claim 7, wherein, The moving member comprises a plurality of connected connecting assemblies; each connecting assembly comprises a first rod and a second rod, the first rod and the second rod are cross-rotationally connected, and the two ends of the first rod are rotationally connected with the end portions of the second rods in the adjacent connecting assemblies; the plurality of battery cells are connected with the connecting points of the first rods and the second rods in the connecting assemblies, and the connecting line of the plurality of connecting points is parallel to the second direction.

9. The battery pack of claim 8, wherein, The moving member further comprises an adjusting rod connected with the connecting assemblies, the box body is provided with a gap slot, one end of the adjusting rod is slidably connected with the support, and the other end of the adjusting rod passes out of the gap slot to control the distance between the plurality of battery cells.

10. The battery pack of any one of claims 1 to 9, wherein, The number of air outlets is at least two, and the air outlets are arranged at intervals along the second direction on the box body.

11. The battery pack of any one of claims 1 to 9, wherein, The battery pack further comprises a fan connected with the box body and covering the air inlet.

Images