Battery pack

Abstract

The utility model discloses a battery pack which comprises a box body, a plurality of modules, a fan and a liquid cooling plate, the box body is provided with a containing cavity, an air inlet and an air outlet, the air inlet and the air outlet are arranged at two opposite ends of the box body and communicated with the containing cavity, the fan is connected with the box body and covers the air inlet and / or the air outlet, the modules are arranged in the containing cavity at intervals, and the liquid cooling plate is arranged in the containing cavity. The liquid cooling plates are arranged in the containing cavity in pairs and located between the adjacent modules, the air inlets and the air outlets are located between the paired liquid cooling plates, air channels are formed between the liquid cooling plates, the liquid cooling plates are used for being attached to the modules, and the technical problem of how to adjust the cooling effect according to parameters such as the battery running state and the environment temperature is solved.

Description

TECHNICAL FIELD

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

[0002] With the rapid development of electric vehicles, energy storage systems and portable electronic devices, battery systems are increasingly widely used. However, a large amount of heat is generated during the operation of the battery, especially under high-power discharge and rapid charging conditions. If the heat cannot be dissipated in time and effectively, the battery temperature will rise rapidly, which may lead to performance degradation, capacity attenuation, and even thermal runaway and other serious safety problems. Therefore, optimizing the heat dissipation performance of the battery system is the key to improving its service life and operational safety

[0003] At present, common battery cooling methods include air cooling, liquid cooling and phase change material cooling. However, the existing battery systems usually use cooling devices with fixed structures, which are difficult to dynamically adjust the cooling effect according to the actual working conditions. For example, when the battery load is light or the ambient temperature is low, the fixed cooling system may cause unnecessary energy consumption, while when the battery load increases or the ambient temperature rises, the fixed cooling capacity may not meet the heat dissipation demand, resulting in high battery temperature and affecting the normal operation of the system.

[0004] Therefore, how to adjust the cooling effect according to the battery operating state and environmental temperature and other parameters has become a technical problem to be solved. SUMMARY

[0005] One purpose of the utility model is to provide a battery pack, which aims to solve the technical problem of how to adjust the cooling effect according to the battery operating state and environmental temperature and other parameters.

[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 in communication with the accommodating cavity, a fan is connected with the box body, the air inlet and / or the air outlet are sealed by a cover, a plurality of modules are arranged in the accommodating cavity at intervals, liquid cooling plates are arranged in pairs in the accommodating cavity and located between adjacent modules, the air inlet and the air outlet are located between the paired liquid cooling plates, an air duct is formed between the liquid cooling plates, and the liquid cooling plates are used to be attached to the modules.

[0007] Optionally, the liquid cooling plate includes a main plate and a branch plate connected with each other, the extension direction of the main plate is a first direction, the extension direction of the branch plate is a second direction, the first direction is from the air inlet to the air outlet, the second direction is perpendicular to the first direction, the main plate is connected with one side of the module, and the branch plate is inserted into the module.

[0008] Optionally, the module includes a plurality of battery cells arranged along a thickness direction of the battery cells, the thickness direction of the battery cells is parallel to the first direction, and the support plate is arranged in a gap between adjacent battery cells and in contact with the battery cells.

[0009] Optionally, the liquid cooling plate further includes a cover body, the liquid cooling plate is provided with an inlet and an outlet, and the cover body is used for sealing the inlet and the outlet.

[0010] Optionally, the box is provided with a gap, one end of the liquid cooling plate provided with the inlet and the other end of the liquid cooling plate provided with the outlet are respectively arranged through the gap.

[0011] Optionally, the inlet is arranged at a position close to the outlet of the liquid cooling plate, and the outlet is arranged at a position close to the inlet of the liquid cooling plate.

[0012] Optionally, the inlet is arranged at a position close to the bottom region of the box, and the outlet is arranged at a position close to the top region of the box.

[0013] Optionally, the liquid cooling plate is in sliding connection with the box, the sliding direction is along a direction perpendicular to the inlet to the outlet, and the pair of liquid cooling plates can be close to or away from each other.

[0014] Optionally, the box is provided with a through groove at opposite ends of the air duct, and the opposite ends of the liquid cooling plate are provided with connecting blocks, the connecting blocks are arranged through the through groove and in sliding connection with the through groove.

[0015] Optionally, the battery pack further includes a fixing member, the fixing member connects the liquid cooling plate and the box and is used for fixing the position of the liquid cooling plate.

[0016] Optionally, the liquid cooling plate further includes a plurality of protrusions, the plurality of protrusions are arranged at a side of the liquid cooling plate close to the air duct and are spaced from each other.

[0017] The beneficial effects of the utility model lie in:

[0018] Compared with the single heat dissipation mode in the prior art, the liquid cooling plate and the air cooling structure are combined in the application to provide a plurality of optional heat dissipation modes for the battery pack, and the heat dissipation mode can be dynamically adjusted according to the working state of the battery and the ambient temperature. The first heat dissipation mode is that the liquid cooling plate is connected with the liquid cooling unit to perform forced liquid cooling, which is suitable for the case of high heat dissipation demand. The second heat dissipation mode is that the air cooling system is used to cool the liquid cooling plate, and the liquid cooling plate is used to dissipate heat of the battery module, which is suitable for the case of low heat dissipation demand. The third heat dissipation mode is that the liquid cooling plate is cooled by natural air flow, which saves energy and reduces noise. At the same time, compared with the air cooling and liquid cooling combination in the prior art, the air cooling system in the application only cools the liquid cooling plate and does not directly act on the module. The difference in heat dissipation efficiency when the air cooling and liquid cooling act on different regions is avoided, so that the problem of temperature difference in the heat dissipation region caused by uneven heat dissipation is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0020] Figure 1 is a whole schematic view of a battery pack provided by the embodiment of the present application;

[0021] Figure 2 is a structural schematic view of a battery pack provided by the embodiment of the present application;

[0022] Figure 3 is a top view of a battery pack provided by the embodiment of the present application;

[0023] Figure 4 is a sectional view of the A-A direction in the Figure 3 provided by the embodiment of the present application;

[0024] Figure 5 is a structural schematic view of another battery pack provided by the embodiment of the present application;

[0025] Figure 6 is a sectional view of the B-B direction in the Figure 3 provided by the embodiment of the present application;

[0026] Figure 7 is a local enlarged view of the A area in the Figure 6 provided by the embodiment of the present application;

[0027] Figure 8 is a schematic view of another state of a battery pack provided by the embodiment of the present application;

[0028] Figure 9 is a schematic view of another state of a battery pack provided by the embodiment of the present application;

[0029] Figure 10 is a structural schematic view of a liquid cooling plate provided by the embodiment of the present application.

[0030] Explanation of figure mark:

[0031] 10, box body; 11, containing cavity; 12, air inlet; 13, air outlet; 14, let position mouth; 15, through slot; 16, air duct; 20, module; 21, electric core; 30, liquid cooling plate; 31, main plate; 32, support plate; 33, cover body; 34, liquid inlet; 35, liquid outlet; 36, connecting block; 37, protrusion; 40, fixing piece; 50, fan. Detailed Implementation

[0032] 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.

[0033] Please see Figure 1 and Figure 2 , Figure 1 This is an overall schematic diagram of a battery pack provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this utility model.

[0034] This utility model provides a battery pack designed to effectively solve the problem of the single heat dissipation mode in existing battery systems. The battery pack includes a housing 10, multiple modules 20, a fan 50, and a liquid cooling plate 30. The housing 10 has an internal cavity 11 with an air inlet 12 and an air outlet 13 at both ends. The air inlet 12 and air outlet 13 are interconnected through the cavity 11, forming an airflow channel. The fan 50 is connected to the housing 10 and covers the air inlet 12. Multiple battery modules 20 are spaced apart within the cavity 11, while the liquid cooling plates 30 are arranged in pairs within the cavity 11, located between adjacent modules 20 and tightly fitted to them. The function of the liquid cooling plates 30 is to remove the heat generated by the modules 20 through liquid circulation, thereby preventing battery overheating and ensuring safe and efficient battery operation.

[0035] See Figure 3 and Figure 4 , Figure 3 This is a top view of a 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 A cross-sectional view along the AA direction. In this embodiment, the receiving cavity 11 of the battery housing 10 is divided into three areas by a liquid cooling plate 30. The areas on either side of the liquid cooling plate 30 are module 20 placement areas, used to house the battery modules 20. Between the liquid cooling plates 30, an air duct 16 area is formed, providing a channel for airflow. The modules 20 are positioned close to the liquid cooling plate 30 to achieve more efficient heat conduction and dissipation. Through this special layout, the battery pack can flexibly adjust its heat dissipation mode to meet different heat dissipation requirements.

[0036] Specifically, the embodiment provides a plurality of heat dissipation modes. When the heat dissipation demand of the battery pack is low, the liquid cooling plate 30 is cooled by the air cooling system, and then the battery module 20 is cooled by the liquid cooling plate 30. The fan 50 is turned on, air is introduced from the air inlet 12, and the heat is taken away through the surface of the liquid cooling plate 30. After the air flows through the liquid cooling plate 30, it is discharged through the air outlet 13. The liquid cooling plate 30 conducts the heat in the module 20 to the cooling liquid through close contact with the module 20, thereby effectively controlling the temperature. In this mode, the cooling of the liquid cooling plate 30 is realized by the air cooling system. It is suitable for low load or normal working conditions.

[0037] When the heat dissipation demand of the battery pack increases, the battery pack is connected to the liquid cooling unit for forced liquid cooling. At this time, the fan 50 is not turned on, and the cooling liquid continuously cools the battery module 20. When the heat dissipation demand of the battery pack further increases, the battery pack is connected to the liquid cooling unit, and the fan 50 is started. The liquid cooling unit and the air cooling system simultaneously cool the liquid cooling plate 30, thereby improving the heat exchange efficiency of the liquid cooling plate 30 and greatly improving the overall heat dissipation capacity. Through the double heat dissipation mode of air cooling and liquid cooling, the battery pack can maintain a low temperature under high load or extreme working conditions, thereby preventing performance degradation or safety hazards caused by high temperature.

[0038] Please refer to Figure 5 , Figure 5 is another internal structure schematic diagram of a battery pack provided by the embodiment of the utility model. In some embodiments, the liquid cooling plate 30 includes a main plate 31 and a branch plate 32, and the main plate 31 and the branch plate 32 are connected with each other and jointly constitute the liquid cooling plate 30. The extension direction of the main plate 31 is a first direction, and the extension direction of the branch plate 32 is a second direction, and the first direction is perpendicular to the second direction. Figure 5 The A direction in the figure is the first direction, and the B direction is the second direction.

[0039] Specifically, the first direction refers to the air flow direction of the air inlet 12 to the air outlet 13 in the battery pack, that is, the main flow direction of the heat dissipation channel in which the liquid cooling plate 30 is located. The main plate 31 is connected with one side of the module 20 and mainly undertakes the task of heat exchange with the surface of the module 20, effectively conducts the heat generated by the module 20 to the liquid cooling plate 30, and then takes away the heat through the cooling liquid in the liquid cooling plate 30. The second direction is a direction perpendicular to the first direction, and the branch plate 32 extends along the direction and is inserted between the battery modules 20, so that the liquid cooling plate 30 can be flexibly arranged between the modules 20 and ensure a good contact surface. The cooling liquid can more fully contact the surface of the module 20, thereby enhancing the heat conduction effect.

[0040] In the embodiment, the main plate 31 and the branch plate 32 cooperate to act on the module 20. The connection of the main plate 31 and the module 20 ensures the conduction of heat, so that the liquid cooling plate 30 can efficiently complete the heat dissipation task of the module 20. The branch plate 32 increases the contact area between the liquid cooling plate 30 and the module 20 through the plug-in layout, and further optimizes the heat exchange efficiency. In addition, the arrangement of the branch plate 32 also enhances the stability and supporting force of the liquid cooling plate 30, improves the stability and durability of the structure, and especially in the long-term operation and high-load working state of the battery pack, the good heat dissipation performance can be maintained.

[0041] Further, the battery module 20 includes a plurality of battery cells 21 arranged in the accommodation cavity 11 along the thickness direction, and the thickness direction is parallel to the first direction (i.e. the air flow direction from the air inlet 12 to the air outlet 13). This arrangement enables high packing density in a limited space, while providing favorable conditions for the arrangement of the heat dissipation structure.

[0042] In order to improve the heat dissipation effect, the branch plate 32 of the liquid cooling plate 30 is arranged in the gap between adjacent battery cells 21 and directly contacts the side surface of the battery cell 21. The contact between the branch plate 32 and the side surface of the battery cell 21 increases the contact area with the battery cell 21. This helps to achieve efficient heat conduction, quickly transfers the heat generated by the battery cell 21 during operation to the liquid cooling plate 30, and timely discharges through the circulation of the cooling liquid, thereby effectively reducing the temperature of the battery cell 21.

[0043] In the embodiment, the branch plate 32 is inserted between adjacent battery cells 21, occupying the usually neglected gap space, which not only improves the heat exchange efficiency between the liquid cooling plate 30 and the battery cell 21, but also enhances the stability of the internal structure of the module 20. After the branch plate 32 is inserted into the gap between the battery cells 21, it can support and fix to a certain extent, reduce the displacement of the battery cells 21 caused by vibration or thermal expansion during operation, and maintain the stability of the overall structure of the module 20. At the same time, through the close contact between the branch plate 32 and the battery cell 21, the heat inside the battery pack can be transferred and dissipated in a more efficient way. In the high-load working state, even if the battery cell 21 generates a large amount of heat, the branch plate 32 can quickly guide the heat to the liquid cooling plate 30, and cooperate with the air cooling system to further improve the heat dissipation effect

[0044] In some embodiments, please refer to Figure 6 , Figure 6 provided by the embodiment of the utility model Figure 3A cross-sectional view in the B-B direction. The liquid cooling plate 30 has an inlet 34 and an outlet 35, which are located at the two ends of the liquid cooling plate 30, respectively, for connecting to a cooling liquid circulation system to enable the cooling liquid to circulate inside the liquid cooling plate 30 and take away the heat generated by the battery module 20 during operation, ensuring that the battery module 20 maintains a low operating temperature during high load or long time operation. The liquid cooling plate 30 also includes a cover 33 for closing the inlet 34 and the outlet 35 of the liquid cooling plate 30, thereby achieving flexible cooling function configuration.

[0045] In this embodiment, the liquid cooling plate 30 can be connected to the external cooling liquid circulation pipeline through the inlet 34 and the outlet 35 to form a complete liquid cooling loop, achieving the dynamic cooling function of the liquid cooling plate 30, so that the cooling liquid can circulate during operation and quickly take away the heat generated by the battery module 20.

[0046] When the inlet 34 and the outlet 35 of the liquid cooling plate 30 are closed by the cover 33 and are not connected to the cooling liquid circulation system, the liquid cooling plate 30 can be used as a static cooling plate. In this state, the liquid cooling plate 30 is in close contact with the battery module 20 through its high thermal conductivity material, and the heat generated by the battery module 20 is diffused to the entire surface of the liquid cooling plate 30 through heat conduction, and then naturally dissipated.

[0047] At the same time, when the liquid cooling plate 30 is used as a static cooling plate, it can be combined with an air cooling structure to operate, and the fan is turned on to cool the liquid cooling plate 30 by the air cooling system, and the liquid cooling plate 30 is cooled by the battery module 20.

[0048] In some embodiments, to facilitate the installation of the liquid cooling plate 30 and the connection of the pipeline, the box 10 is provided with a clearance 14 corresponding to the positions of the inlet 34 and the outlet 35 of the liquid cooling plate 30.

[0049] In this embodiment, the clearance 14 enables the liquid cooling plate 30 to be stably installed inside the battery pack box 10, and allows the cooling liquid pipeline to be introduced from the outside of the box 10, avoiding spatial conflicts and structural interference.

[0050] Further, to optimize the flow path of the cooling liquid and the heat conduction effect, the inlet 34 is arranged at a position close to the air outlet 13 of the liquid cooling plate 30, and the outlet 35 is arranged at a position close to the air inlet 12 of the liquid cooling plate 30. By coordinating the flow directions of the air flow and the liquid cooling liquid, the overall heat exchange efficiency is improved.

[0051] In the embodiment, after the cooling liquid enters the liquid cooling plate 30 from the liquid inlet 34, the liquid cooling plate 30 absorbs and removes the heat generated by the battery module 20 through close contact with the surface of the battery module 20. In this process, the cooling liquid exchanges heat with the heat source in the battery module 20 efficiently, and the temperature gradually rises. The liquid inlet 34 is arranged at the position close to the air outlet 13 of the liquid cooling plate 30, and the liquid outlet 35 is arranged at the position close to the air inlet 12 of the liquid cooling plate 30, so that the flow direction of the cooling liquid is opposite to the flow direction of the air flow. The heat dissipation efficiency of the cooling liquid gradually decreases due to the temperature rise, and the efficiency of the air cooling in this direction gradually increases, thereby compensating for the decrease in heat dissipation efficiency, and making the overall heat dissipation efficiency more uniform.

[0052] Further, in order to optimize the heat conduction effect, the liquid inlet 34 is arranged at the position close to the bottom of the box body 10 of the liquid cooling plate 30, and the liquid outlet 35 is arranged at the position close to the top of the box body 10 of the liquid cooling plate 30.

[0053] In the embodiment, considering that the liquid will release bubbles during the flow process as the temperature rises, especially after contacting the heat source. Therefore, the liquid inlet 34 is arranged at the position close to the bottom of the box body 10 of the liquid cooling plate 30, and the liquid outlet 35 is arranged at the position close to the top of the box body 10 of the liquid cooling plate 30. Arranging the liquid outlet 35 at the top helps to discharge these bubbles from the system, avoiding the accumulation of bubbles at the bottom, thereby affecting the normal work of the liquid cooling system.

[0054] Please refer to Figure 7 , Figure 7 is a partial enlarged view of the A area in the embodiment of the utility model. Figure 6 In some embodiments, the liquid cooling plate 30 is in sliding connection with the battery pack, and the liquid cooling plate 30 can move along the direction perpendicular to the air inlet 12 to the air outlet 13, so as to adjust the distance between the pair of liquid cooling plates 30 from each other, so that the pair of liquid cooling plates 30 are close to each other and far away from each other, realizing a more flexible heat dissipation mode.

[0055] Specifically, please refer to Figure 8 and Figure 9 , Figure 8 is another state schematic view of the battery pack provided by the embodiment of the utility model, Figure 9is another state schematic diagram of the battery pack provided by the embodiment of the utility model. When the pair of liquid cooling plates 30 are mutually slid through the slide rail and adjusted to the position of mutual approach or adhesion, the liquid cooling plate 30 will no longer be in contact with the battery module 20 directly, and will not take away heat through the cooling liquid. At this time, the cooling effect of the liquid cooling plate 30 completely stops. At this time, the battery pack is switched to the air cooling mode, and along with the distance between the liquid cooling plates 30 reducing or even completely approaching, the air duct 16 space between the liquid cooling plates 30 also reduces or disappears, so that the cooling air can no longer flow through the inside of the liquid cooling plate 30, on the contrary, the cooling air flows through the two sides of the liquid cooling plate 30 and directly acts on the surface of the battery module 20, and starts to rely on the air cooling system for heat dissipation. In some embodiments, the battery cells 21 in the battery pack are arranged along the thickness direction, the thickness direction is perpendicular to the air flow direction, and there is a gap between the battery cells 21, so that when the battery pack is switched to the air cooling mode, the air flow can pass through the gap between the batteries to dissipate heat from the module 20, greatly improving the heat dissipation efficiency.

[0056] In the present embodiment, by adjusting the position of the liquid cooling plate 30, a third cooling mode is provided for the battery pack: air cooling mode, that is, the cooling air directly acts on the surface of the battery module 20 to take away the heat generated by the module 20, and the liquid cooling plate 30 no longer participates in heat dissipation. The entire heat dissipation process only relies on the air cooling system. When the heat dissipation demand is low, completely relying on the air cooling system can save energy, and at the same time avoid unnecessary operation of the liquid cooling system.

[0057] Further, in the present embodiment, in order to realize the sliding connection of the liquid cooling plate 30 and the slide rail, a specific sliding connection arrangement is provided, the box body 10 of the battery pack is provided with a through slot 15 at opposite ends of the air duct 16. The opposite ends of the liquid cooling plate 30 are provided with a connecting block 36, the connecting block 36 passes through the through slot 15 and is in sliding connection with the through slot 15, so that the liquid cooling plate 30 can slide along the through slot 15 inside the box body 10, thereby adjusting the distance between the liquid cooling plates 30 and realizing flexible heat dissipation mode switching.

[0058] In the present embodiment, the structure of the connecting block 36 and the through slot 15 is matched, and the connecting block 36 can freely pass through the through slot 15, so that the liquid cooling plate 30 can stably move along the direction of the through slot 15, and will not be separated from the slide rail due to external force. And has enough mechanical strength to support the load generated by the liquid cooling plate 30 during adjustment.

[0059] Further, in order to improve the stability of the liquid cooling plate 30 in the battery pack, a fixing piece 40 is introduced in the present embodiment. The fixing piece 40 is used to connect the liquid cooling plate 30 and the box body 10, and ensures that the liquid cooling plate 30 can be firmly kept at the predetermined position during adjustment, preventing displacement or loosening of the liquid cooling plate 30 during use due to external force.

[0060] In the embodiment, the fixing piece 40 is made of elastic material and includes a free end and a fixed end, the fixed end of the fixing piece 40 is connected with the liquid cooling plate 30, and the free end is abutted against the box body 10, the arrangement of the fixing piece 40 keeps a certain contact pressure between the liquid cooling plate 30 and the box body 10 at all times, and sufficient locking force can be provided when the liquid cooling plate 30 is adjusted to slide, so that the liquid cooling plate 30 is stably kept at the adjusted position.

[0061] Please refer to Figure 10 , Figure 10 is a structural schematic diagram of the liquid cooling plate 30. In some embodiments, the liquid cooling plate 30 further includes a plurality of protrusions 37, the protrusions 37 are usually protruding structures formed on the surface of the liquid cooling plate 30, and can adopt different shapes such as columnar, conical and strip-shaped. The protrusions 37 are distributed on the surface of the liquid cooling plate 30, especially on the side of the liquid cooling plate 30 close to the air duct 16, and are arranged at intervals from each other.

[0062] In the embodiment, the presence of the protrusions 37 can significantly improve the heat dissipation capacity of the battery pack. On the one hand, the protrusions 37 can effectively increase the surface area of the liquid cooling plate 30 in contact with the air flow in the air duct 16, thereby enhancing the heat exchange effect between the liquid cooling plate 30 and the air flow and improving the heat dissipation efficiency. On the other hand, the interval between the protrusions 37 and the planar part of the liquid cooling plate 30 enables the air flow to generate vortexes when flowing on the surface of the liquid cooling plate 30, thereby increasing the contact time and area of the air flow with the liquid cooling plate 30.

[0063] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0064] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or can have a middle element present at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can be indirectly connected to the other element through a middle element.

[0065] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0066] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or directly / indirectly applied in other related technical fields under the utility model concept of the present application is included in the patent protection scope of the present application.

Claims

1. A battery pack, characterized in that, include: The housing has a receiving cavity, and an air inlet and an air outlet are located at opposite ends of the housing and communicate with the receiving cavity; A fan is connected to the housing and covers the air inlet and / or the air outlet. Multiple modules are spaced apart in the receiving cavity; Liquid cooling plates are arranged in pairs in the receiving cavity and located between adjacent modules. The air inlet and the air outlet are located between the pairs of liquid cooling plates, and an air duct is formed between the liquid cooling plates. The liquid cooling plates are used to fit with the modules.

2. The battery pack according to claim 1, characterized in that, The liquid cooling plate includes a main board and a support board connected to each other. The main board extends in a first direction, and the support board extends in a second direction. The first direction is from the air inlet to the air outlet, and the second direction is perpendicular to the first direction. The main board is connected to one side of the module, and the support board is inserted into the module.

3. A battery pack according to claim 2, characterized in that, The module includes multiple battery cells arranged along its thickness direction, the thickness direction of the battery cells being parallel to the first direction, and the support plate being disposed in the gap between adjacent battery cells and in contact with the battery cells.

4. A battery pack according to claim 1, characterized in that, The liquid cooling plate also includes a cover, and the liquid cooling plate has a liquid inlet and a liquid outlet. The cover is used to seal the liquid inlet and the liquid outlet.

5. A battery pack according to claim 4, characterized in that, The housing has a clearance opening, and the liquid cooling plate has the clearance opening at one end where the liquid inlet is located and at the other end where the liquid outlet is located.

6. A battery pack according to claim 4, characterized in that, The liquid inlet is located on the liquid cooling plate near the air outlet, and the liquid outlet is located on the liquid cooling plate near the air inlet.

7. A battery pack according to claim 4, characterized in that, The liquid inlet is located on the liquid cooling plate near the bottom of the housing, and the liquid outlet is located on the liquid cooling plate near the top of the housing.

8. A battery pack according to claim 1, characterized in that, The liquid cooling plate is slidably connected to the housing, and the sliding direction is perpendicular to the direction from the air inlet to the air outlet. The paired liquid cooling plates can move closer to or further away from each other.

9. A battery pack according to claim 8, characterized in that, The housing has through slots at opposite ends of the air duct, and connecting blocks are provided at opposite ends of the liquid cooling plate. The connecting blocks pass through the through slots and are slidably connected to the through slots.

10. A battery pack according to claim 8, characterized in that, The battery pack also includes a fixing component that connects the liquid cooling plate to the housing and is used to fix the position of the liquid cooling plate.

11. A battery pack according to any one of claims 1 to 10, characterized in that, The liquid cooling plate also includes a plurality of protrusions, which are disposed on the side of the liquid cooling plate near the air duct and are spaced apart from each other.

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