Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, the battery pack comprises a box body, at least two battery modules, at least one wave making part and a driving mechanism, a battery cavity is formed in the box body, cooling liquid is stored in the battery cavity, the at least two battery modules are installed in the battery cavity, the at least two battery modules are arranged at intervals along a first direction, and the at least one wave making part is connected with the at least two battery modules. Each wave making part is located between the two adjacent battery modules and movably installed in the battery cavity, and the driving mechanism is used for driving the wave making parts to move, so that at least part of each wave making part is suitable for moving close to or away from one of the two adjacent battery modules, the cooling liquid with the increased temperature can be rapidly separated from the battery modules, and the cooling efficiency is improved. And the low-temperature cooling liquid which is not directly contacted with the battery module can be quickly contacted with the battery module and exchanges heat with the battery module, so that the low-temperature cooling liquid can be always ensured to be in timely contact with the surface of the battery cell to complete heat exchange, the heat exchange efficiency of the cooling liquid and the battery module is improved, and the heat dissipation is uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] Immersion heat dissipation technology has a very high heat dissipation capacity. When using immersion heat dissipation technology, it is usually necessary to contain coolant in a single battery pack so that the battery module is in contact with the coolant, and heat is exchanged between the coolant and the battery module to achieve cooling of the battery module. In related technologies, the heat exchange effect of the coolant in the battery pack is poor and the heat dissipation is uneven. Utility Model Content

[0003] The embodiments of the utility model provide a battery pack and an electrical device, which can improve the heat exchange effect of the coolant in the battery pack and dissipate heat evenly.

[0004] In a first aspect, an embodiment of the present invention provides a battery pack.

[0005] In one embodiment, the battery pack comprises:

[0006] A box body, wherein the box body is formed with a battery cavity, and a coolant is stored in the battery cavity;

[0007] At least two battery modules are installed in the battery cavity, and at least two of the battery modules are arranged at intervals along a first direction; and

[0008] At least one wave-making portion, each of the wave-making portions is located between two adjacent battery modules and is movably installed in the battery cavity;

[0009] The driving mechanism is used to drive the wave-making part to move so that at least a part of the wave-making part is suitable for moving close to or away from one of the two adjacent battery modules.

[0010] In one embodiment, one end of at least one of the wave-making parts is rotatably installed in the battery cavity around an axis extending along a second direction, so that a portion of each of the wave-making parts is suitable for approaching or moving away from one of two adjacent battery modules, and the second direction is arranged to intersect with the first direction.

[0011] In one embodiment, the first direction and the second direction are arranged crosswise in a horizontal plane;

[0012] The wave-making part is arranged in a plate shape and extends along the second direction.

[0013] In one embodiment, the first direction and the second direction are arranged crosswise in a horizontal plane;

[0014] The other end of at least one of the wave-making parts is rotatably connected to the box body through a rotating shaft, the rotating shaft is extended along the second direction, and the rotating shaft is arranged adjacent to the top wall of the box body.

[0015] In one embodiment, at least one of the wave-making parts is slidably installed in the battery cavity along the first direction, and the driving mechanism drives at least one of the wave-making parts to move along the first direction.

[0016] In one embodiment, there is a gap between at least one of the wave-making parts and the bottom wall of the box.

[0017] In one embodiment, the gap is B, wherein 3mm≤B≤6mm.

[0018] In one embodiment, the box body is also provided with a liquid inlet and a liquid outlet, and along the first direction, the liquid inlet and the liquid outlet are respectively arranged on both sides of at least one of the wave-making parts, and the liquid inlet and the liquid outlet are both connected to the battery cavity.

[0019] In one embodiment, the box body includes a first side wall and a second side wall that are oppositely disposed, each of the wave-making portions extends from the first side wall to the second side wall, and the battery cavity is formed into a plurality of accommodating spaces, each of the accommodating spaces accommodating one of the battery modules;

[0020] The liquid inlet and the liquid outlet are arranged on the first side wall, and the liquid inlet and the liquid outlet are communicated with different accommodating spaces;

[0021] At least one of the wave-making parts is spaced apart from the second side wall, so that a communication port is formed between the at least one of the wave-making parts and the second side wall, and the communication port communicates with two adjacent accommodating spaces.

[0022] In a second aspect, an embodiment of the utility model provides an electrical device.

[0023] In one embodiment, the electrical device comprises the battery pack as described above, and the battery pack comprises:

[0024] A box body, wherein the box body is formed with a battery cavity, and a coolant is stored in the battery cavity;

[0025] At least two battery modules are installed in the battery cavity, and at least two of the battery modules are arranged at intervals along a first direction; and

[0026] At least one wave-making portion, each of the wave-making portions is located between two adjacent battery modules and is movably installed in the battery cavity;

[0027] The driving mechanism is used to drive the wave-making part to move so that at least a part of the wave-making part is suitable for moving close to or away from one of the two adjacent battery modules.

[0028] Beneficial effects of the embodiments of the utility model:

[0029] In an embodiment of the utility model, by storing the cooling liquid in the box and installing at least two battery modules in the box, at least two battery modules are arranged at intervals along the first direction, so that the cooling liquid can fully contact with each battery module. When the battery module is heated up, the temperature of the cooling liquid in direct contact with the battery module increases. Since each of the wave-making parts is located between two adjacent battery modules, and each of the wave-making parts is driven by the driving mechanism, so that at least a part of the wave-making part is suitable for moving close to or away from one of the two adjacent battery modules, the wave-making part will cause disturbances to the cooling liquid around it. This disturbance will induce the coolant to flow, especially when the wave-making part is close to or away from the battery module, it will push the coolant to flow near the battery module, enhance the convection of the coolant near the battery module, and achieve that the coolant with increased temperature can be quickly separated from the battery module, and the coolant with low temperature that is not directly in contact with the battery module can quickly contact the battery module, thereby helping to break the temperature boundary layer near the battery module, and always ensure that the low-temperature coolant can contact the surface of the battery cell in time to complete the heat exchange, thereby improving the heat exchange efficiency between the coolant and the battery module, so that the heat exchange effect of the coolant in the battery pack is good. In addition, the movement of the wave-making part may also cause the coolant to swirl and mix in the local area. This mixing will mix the coolant with increased temperature with the coolant with lower temperature, thereby reducing the local temperature. This mixing effect helps to reduce the formation of hot spots, improve the uniformity of cooling, make the coolant dissipate heat evenly, help reduce temperature gradients, make the temperature distribution on the surface of the battery module more uniform, and improve the performance and life of the battery pack. As the wave-making part moves, it continuously destroys and rebuilds the coolant boundary layer near the surface of the battery module. This destruction and reconstruction process helps reduce thermal resistance and improves the ability of the coolant to remove heat from the surface of the battery module. This means that less coolant can be used with the same heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a three-dimensional schematic diagram of a battery pack provided by an embodiment of the utility model;

[0032] Figure 2 yes Figure 1 A three-dimensional schematic diagram of a partial structure of a battery pack shown;

[0033] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the wave-making part in the battery pack shown;

[0034] Figure 4 yes Figure 1 A schematic cross-sectional view of a battery pack shown;

[0035] Figure 5 yes Figure 1 A three-dimensional schematic diagram of a cover body in the battery pack shown;

[0036] Figure 6 yes Figure 1 A three-dimensional schematic diagram of the base in the battery pack shown.

[0037] Description of Figure Numbers:

[0038] 100. Battery pack;

[0039] 110, box body, 101, base, 102, cover body, 103, sealing ring, 111, battery cavity, 112, liquid inlet, 113, liquid outlet, 114, first side wall, 115, second side wall, 116, communication port, 117, equipment cavity, 118, exhaust port;

[0040] 120. Battery module;

[0041] 130, wave-making part, 131, rotating shaft;

[0042] 140. Driving mechanism;

[0043] 150. Liquid level sensor. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0045] Immersion heat dissipation technology has a very high heat dissipation capacity. When using immersion heat dissipation technology, it is usually necessary to contain coolant in a single battery pack so that the battery module is in contact with the coolant, and heat is exchanged between the coolant and the battery module to achieve cooling of the battery module. In related technologies, the heat exchange effect of the coolant in the battery pack is poor and the heat dissipation is uneven.

[0046] In view of this, the utility model proposes a battery pack. Figures 1 to 6 This is a schematic structural diagram of an embodiment of a battery pack provided by the utility model. The battery pack provided by the utility model can improve the heat exchange efficiency between the battery module and the coolant. The battery pack will be described in detail in conjunction with the main drawings below.

[0047] Reference Figures 1 to 4 The battery pack 100 includes a box 110, at least two battery modules 120, at least one wave-making part 130 and a driving mechanism 140. The box 110 is formed with a battery cavity 111, in which a coolant is stored, the at least two battery modules 120 are installed in the battery cavity 111, at least two battery modules 120 are arranged at intervals along a first direction, each wave-making part 130 is between two adjacent battery modules 120, and is movably installed in the battery cavity 111, and the driving mechanism 140 is used to drive the wave-making part 130 to move, so that at least a part of the wave-making part 130 is suitable for moving close to or away from one of the two adjacent battery modules 120.

[0048] In an embodiment of the utility model, by storing the cooling liquid in the box body 110 and installing at least two of the battery modules 120 in the box body 110, at least two of the battery modules 120 are arranged at intervals along the first direction, so that the cooling liquid can fully contact with each of the battery modules 120. When the battery module 120 is heated up, the temperature of the cooling liquid in direct contact with the battery module 120 increases. Since each of the wave-making parts 130 is located between two adjacent battery modules 120, and each of the wave-making parts 130 is driven by the driving mechanism 140, so that at least a part of the wave-making part 130 is suitable for moving close to or away from one of the two adjacent battery modules 120, the wave-making part 130 will cause disturbances to the cooling liquid around it. This disturbance will induce the coolant to flow, especially when the wave-making part 130 is close to or away from the battery module 120, it will push the coolant to flow near the battery module 120, enhance the convection of the coolant near the battery module 120, and achieve the coolant with increased temperature to be quickly separated from the battery module 120, while the coolant with low temperature that is not directly in contact with the battery module 120 can quickly contact the battery module 120, thereby helping to break the temperature boundary layer near the battery module 120, and always ensure that the low-temperature coolant can contact the surface of the battery cell in time to complete the heat exchange, thereby improving the heat exchange efficiency between the coolant and the battery module 120, so that the heat exchange effect of the coolant in the battery pack 100 is good. In addition, the movement of the wave-making part 130 may also cause the coolant to swirl and mix in the local area, and this mixing will mix the coolant with increased temperature with the coolant with lower temperature, thereby reducing the local temperature. This mixing effect helps to reduce the formation of hot spots, improve the uniformity of cooling, and make the coolant dissipate heat evenly, which helps to reduce temperature gradients, making the temperature distribution on the surface of the battery module 120 more uniform, and improving the performance and life of the battery pack 100. When the wave-making portion 130 moves, it will continuously destroy and rebuild the coolant boundary layer near the surface of the battery module 120. This destruction and reconstruction process helps to reduce thermal resistance and improve the ability of the coolant to remove heat from the surface of the battery module 120. This means that under the same heat dissipation requirements, less coolant can be used to achieve the desired heat dissipation effect.

[0049] It should be noted that in fluid dynamics, the boundary layer is the region where the velocity gradient changes significantly when the fluid approaches the solid surface.

[0050] Specifically, refer to Figure 2In an embodiment of the present application, one end of at least one of the wave-making parts 130 is rotatably installed in the battery cavity 111 around an axis extending along the second direction, so that a portion of each of the wave-making parts 130 is suitable for approaching or moving away from one of the two adjacent battery modules 120, and the second direction is arranged crosswise with the first direction. In this way, when the wave-making part 130 is driven to rotate around the axis extending in the second direction, the coolant adjacent to the wave-making part in the battery cavity 111 will be convected, so that the coolant whose temperature rises after completing the heat exchange with the battery module 120 can be quickly separated from the battery module 120, and the coolant with a low temperature that is not directly in contact with the battery module 120 can quickly contact the battery module 120 and exchange heat with the battery module 120, thereby cooling the battery module 120 and improving the heat exchange efficiency. The rotation of the wave-making part 130 causes its part to constantly approach or move away from the battery module 120, which may cause the coolant to swirl and mix in the local area. This mixing will mix the coolant with a higher temperature with the coolant with a lower temperature, thereby reducing the local temperature. This mixing effect helps to reduce the formation of hot spots, improve the uniformity of cooling, and help reduce the temperature gradient, so that the temperature distribution on the surface of the battery module 120 is more uniform, and improve the performance and life of the battery pack 100. When the wave-making part 130 moves, it will continuously destroy and rebuild the coolant boundary layer near the surface of the battery module 120. This destruction and reconstruction process helps to reduce thermal resistance and improve the ability of the coolant to take away heat from the surface of the battery module 120. In addition, the rotation of the wave-making part 130 may cause the liquid level of the coolant to be partially raised, which can increase the contact area between the coolant and the surface of the battery module 120, further enhancing the heat exchange effect.

[0051] In addition, the rotation of the wave-making part 130 can optimize the flow path of the coolant in the battery cavity 111, so that the coolant flows through the surface of the battery module 120 more effectively, reducing the retention of the coolant in the ineffective area, thereby reducing the demand for the amount of coolant. Due to the improved heat exchange efficiency, the heat generated by the battery module 120 can be taken away by the coolant more quickly, which means that under the same heat dissipation requirements, less coolant can be used to achieve the expected heat dissipation effect.

[0052] There are many types of the driving mechanism 140 that drives at least one end of the wave-making part 130 to rotate around an axis extending along the second direction. For example, the driving mechanism 140 may include a driving motor and a transmission gear set. In other embodiments, the driving mechanism 140 may also include a swing motor, etc. Specifically, this application does not limit this. In addition, since the technology of driving the wave-making part to rotate by the driving motor and the transmission gear set or the swing motor is mature, this application does not repeat them one by one. Of course, this application does not limit the installation position of the driving mechanism 140. For example, in one embodiment, the driving mechanism 140 can be installed in the box 110. In another embodiment, the driving mechanism 140 can also be installed outside the box 110.

[0053] The wave-making part 130 has various shapes, for example, the wave-making part 130 may also be in a spiral shape, a wave shape, a fan shape, or a turbine shape, etc. Specifically, the present application does not limit this. Figure 1 In an embodiment of the present application, the first direction and the second direction are arranged crosswise in a horizontal plane, and the wave-making portion 130 is arranged in a plate shape and extends along the second direction, so that the wave-making portion 130 can more effectively utilize the space inside the battery pack 100, especially in the horizontal direction. This can reduce the installation space and, to a certain extent, the volume of the battery pack 100. When the wave-making portion 130 extends along the second direction, it helps the coolant to form a stable flow pattern in the battery pack 100, reduce turbulence and dead zones, and ensure that the coolant can flow evenly through each of the battery modules 120. When the plate-shaped wave-making portion 130 rotates around its axis, it can more effectively stir the coolant, break the thermal boundary layer, and improve the heat exchange efficiency. The plate-shaped wave-making portion 130 usually has a larger cross-sectional area, so that more cooling liquid with a higher temperature after completing heat exchange with the battery module 120 can be quickly separated from the battery module 120, while more cooling liquid with a lower temperature that is not in direct contact with the battery module 120 can quickly contact the battery module 120 and exchange heat with the battery module 120, thereby cooling the battery module 120 and improving the heat exchange efficiency.

[0054] It should be noted that, in the embodiments of the present application, the low temperature refers to the cooling liquid whose temperature rises after the heat exchange is completed. In addition, the wave-making part 130 can be made of many materials, for example, the wave-making part 130 can be made of metal, plastic or ceramic, etc. Specifically, the present application does not limit this.

[0055] Reference Figure 2 and Figure 3, the first direction and the second direction are arranged crosswise in the horizontal plane, the other end of at least one of the wave-making parts 130 is rotatably connected to the box body 110 through a rotating shaft 131, the rotating shaft 131 is extended along the second direction, and the rotating shaft 131 is arranged adjacent to the top wall of the box body 110, so that, due to the cross arrangement of the first direction and the second direction, the wave-making part 130 can correspond to more areas of the battery module 120 when rotating, so that more cooling liquid with a higher temperature after completing heat exchange with the battery module 120 can be quickly separated from the battery module 120, and more cooling liquid with a lower temperature that is not directly in contact with the battery module 120 can quickly contact the battery module 120 and exchange heat with the battery module 120, so as to achieve cooling of the battery module 120, thereby improving the heat exchange efficiency. The rotating shaft 131 is extended along the second direction, so that the wave-making part 130 can produce a greater stirring effect when rotating, which helps to break the thermal boundary layer in the cooling liquid and enhance the heat exchange efficiency. Through the stirring effect of the wave-making part 130, the coolant can flow and distribute more effectively, reducing the retention and waste of the coolant, and achieving the same heat dissipation effect while reducing the demand for the amount of coolant.

[0056] In addition, the rotating shaft 131 is arranged near the top wall of the box body 110. When the same heat dissipation effect is required, the angle of rotation of the wave-making part 130 is smaller, which can reduce the rotation space required for the rotation of the wave-making part 130 to a certain extent, making the structure of the battery pack 100 more compact. The rotating shaft 131 is arranged near the top wall of the box body 110, making it easier to install and remove the wave-making part 130, and facilitating subsequent maintenance and maintenance work.

[0057] Specifically, refer to Figure 2 In an embodiment of the present application, the first direction and the second direction are arranged perpendicularly to each other in a horizontal plane. Thus, this design allows the wave-making part 130 to rotate without interfering with other components inside the box 110 and without taking up too much space.

[0058] It should be noted that, in other embodiments, the rotation axis 131 may also be arranged in the middle of the wave-making board, and specifically, this application does not limit this. In addition, in other embodiments, the first direction and the second direction may also intersect in a vertical plane, and specifically, this application does not limit this.

[0059] In one embodiment, at least one of the wave-making parts 130 is slidably installed in the battery cavity 111 along the first direction, and the driving mechanism 140 drives at least one of the wave-making parts 130 to move along the first direction, so that the wave-making part 130 will disturb the coolant around it. This disturbance will induce the coolant to flow, especially when the wave-making part 130 is close to or away from the battery module 120, it will push the coolant to flow near the battery module 120, enhance the convection of the coolant near the battery module 120, and achieve that the coolant with increased temperature can be quickly separated from the battery module 120, and the coolant with low temperature that is not directly in contact with the battery module 120 can quickly contact the battery module 120, thereby helping to break the temperature boundary layer near the battery module 120, and always ensure that the low-temperature coolant can contact the surface of the battery core in time to complete the heat exchange, thereby improving the heat exchange efficiency between the coolant and the battery module 120. In addition, the movement of the wave-making part 130 may also cause the coolant to swirl and mix in a local area, and this mixing will mix the coolant with a higher temperature with the coolant with a lower temperature, thereby reducing the local temperature. This mixing effect helps to reduce the formation of hot spots, improve the uniformity of cooling, and help reduce the temperature gradient, so that the temperature distribution on the surface of the battery module 120 is more uniform, and the performance and life of the battery pack 100 are improved. When the wave-making part 130 moves, it will continuously destroy and rebuild the coolant boundary layer near the surface of the battery module 120. This destruction and reconstruction process helps to reduce thermal resistance and improve the ability of the coolant to take away heat from the surface of the battery module 120. This means that under the same heat dissipation requirements, less coolant can be used to achieve the expected heat dissipation effect. In addition, the sliding of at least one of the wave-making parts 130 along the first direction may cause the liquid level of the coolant to be partially raised, which can increase the contact area between the coolant and the surface of the battery module 120, further enhance the heat exchange effect, and improve the performance and safety of the battery pack 100. The sliding installation method makes the movement of the wave-making part 130 in the battery cavity 111 more stable and reliable. This design can reduce the risk of damage or failure of the wave-making part 130 caused by mechanical vibration or external force impact, and improve the safety and reliability of the entire battery pack 100.

[0060] It should be noted that the wave-making part 130 and the box body 110 are connected by a sliding structure, and the sliding structure includes a sliding part extending along the first direction and a matching part adapted to the sliding part, the sliding part is arranged on the box body 110, and the matching part is arranged on the wave-making part 130. In this way, the sliding structure provides precise guidance for the wave-making part 130 through the sliding part and the matching part extending along the first direction. This ensures that the wave-making part 130 slides along a predetermined path inside the box body 110, thereby ensuring the directionality and effectiveness of the flow of the coolant. The design of the sliding structure makes it easier to install and disassemble the wave-making part 130. Specifically, the sliding part may include a slide groove or a sliding rod, and the matching part may correspondingly include a protrusion and a sliding hole. The present application does not limit the specific settings of the sliding part and the matching part.

[0061] In one embodiment, at least one of the wave-making parts 130 has a gap with the bottom wall of the box 110, so that the gap between the wave-making part 130 and the bottom wall of the box 110 can reduce the resistance of the wave-making part 130 during the activity and reduce noise. In addition, the presence of the gap allows the coolant to flow freely under the wave-making part 130, reducing the flow obstruction caused by direct contact with the bottom wall. This unobstructed flow path allows the coolant to flow more smoothly, thereby improving the heat dissipation efficiency. When the coolant encounters obstacles during the flow process, energy loss will occur. The design of the gap significantly reduces this energy loss because the coolant can flow more freely, reducing the energy consumption caused by friction, turbulence and other factors. Since the coolant can flow more smoothly, it can more effectively cover the surface of the battery module 120 and take away more heat. This helps to improve the heat dissipation effect and ensure that the battery pack 100 operates within the optimal temperature range, thereby extending the life of the battery pack 100 and improving the stability of the system. The presence of the gap reduces the retention of coolant near the bottom wall of the box 110. Coolant retention may cause local temperature rise, affecting the heat dissipation effect. The design of the gap helps to ensure that the coolant is evenly distributed over the entire surface of the battery module 120, reducing temperature differences.

[0062] Furthermore, the gap is B, wherein 3mm≤B≤6mm. Thus, this range ensures that the coolant has enough space to flow under the wave-making part 130, and the flow will not be restricted due to the gap being too small, nor will the contact area between the wave-making part 130 and the coolant be reduced due to the gap being too large. This optimization enables the coolant to cover the battery module 120 more evenly, thereby improving the heat dissipation effect. Within this gap range, the resistance encountered by the coolant during flow is moderate, and neither too much energy is consumed due to excessive resistance, nor the heat dissipation effect is reduced due to too small resistance. This balance helps to reduce energy loss and improve the efficiency of the heat dissipation system. An appropriate gap B helps to prevent the coolant from being retained near the bottom wall of the box 110. The retained coolant may cause local temperature rise, affecting the heat dissipation effect. Within this gap range, the coolant can flow smoothly, reducing retention.

[0063] More specifically, the gap between at least one of the wave-making parts 130 and the bottom wall of the box body 110 can be 3mm, 3.1mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 4mm, 4.1mm, 4.4mm, 4.5mm, 4.7mm, 4.9mm, 5.3mm, 5.5mm, 5.8mm, 6mm, etc. Specifically, the present application does not limit this.

[0064] Reference Figure 1 and Figure 2In one embodiment, the housing 110 is further provided with a liquid inlet 112 and a liquid outlet 113. Along the first direction, the liquid inlet 112 and the liquid outlet 113 are respectively arranged on both sides of at least one of the wave-making parts 130. The liquid inlet 112 and the liquid outlet 113 are both connected to the battery cavity 111. In this way, such a layout can ensure that the coolant forms an effective circulation flow path in the battery cavity 111. The coolant enters from the liquid inlet 112, is pushed by the wave-making part 130, and exchanges heat with the battery module 120, and finally flows out from the liquid outlet 113 to form a complete cycle. This flow path can maximize the utilization efficiency of the coolant and ensure that the battery module 120 is evenly cooled. When the coolant circulates in the battery cavity 111, it can take away the heat generated by the battery module 120 and be discharged through the liquid outlet 113. Since the liquid inlet 112 and the liquid outlet 113 are respectively arranged on both sides of the wave-making part 130, the coolant can cover more of the surface of the battery module 120 during the flow process, thereby improving the heat dissipation efficiency. This helps to keep the battery module 120 within the optimal operating temperature range and extend the service life of the battery pack 100. By arranging the liquid inlet 112 and the liquid outlet 113 on both sides of the wave-making part 130, it can be ensured that the coolant forms a continuous and stable flow in the battery cavity 111, avoiding heat accumulation in a certain area. This design helps to reduce the temperature gradient inside the battery module 120 and reduce performance degradation and safety hazards caused by uneven temperature.

[0065] Reference Figure 1 and Figure 4In one embodiment, the box body 110 includes a first side wall 114 and a second side wall 115 that are opposite to each other, each of the wave-making parts 130 extends from the first side wall 114 to the second side wall 115, and forms a plurality of accommodating spaces in the battery cavity 111, each of the accommodating spaces accommodating one of the battery modules 120, the liquid inlet 112 and the liquid outlet 113 are arranged on the first side wall 114, the liquid inlet 112 and the liquid outlet 113 are communicated with different accommodating spaces, at least one of the wave-making parts 130 is spaced from the second side wall 115, so that a communication port 116 is formed between at least one of the wave-making parts 130 and the second side wall 115, and the communication port 116 communicates with two adjacent accommodating spaces, so that the battery cavity 111 is divided into a plurality of accommodating spaces by the wave-making parts 130, each of the spaces accommodating one of the battery modules 120, and it can be ensured that each of the battery modules 120 can be independently heat-dissipated. This design can more accurately control the temperature of each battery module 120 and prevent performance degradation or safety hazards caused by local overheating. The liquid inlet 112 and the liquid outlet 113 are arranged on the first side wall 114 and connected to different storage spaces. At least one wave-making part 130 is spaced apart from the second side wall 115 to form the connecting port 116, so that two adjacent storage spaces can be connected to each other, which means that after the coolant enters one storage space from the liquid inlet 112, it can flow to another storage space and be discharged from the liquid outlet 113, so that the coolant can circulate in the battery cavity 111 and improve the heat exchange efficiency between the coolant and the battery module 120. In addition, this design can promote the flow of coolant between different storage spaces, achieve balanced distribution of heat, and avoid overheating or overcooling in a certain area.

[0066] In one embodiment, the liquid inlet 112 and / or the liquid outlet 113 are provided with a solenoid valve, and the solenoid valve is used to open or close the liquid inlet 112 and / or the liquid outlet 113. In this way, the solenoid valve can accurately open or close the liquid inlet 112 and / or the liquid outlet 113 as needed, thereby achieving precise control of the flow of the coolant. This control can be adjusted according to the specific needs and operating status of the battery pack 100 to ensure that the coolant circulation in the battery pack 100 operates in the best state. By providing the solenoid valve, the liquid inlet 112 and / or the liquid outlet 113 can be quickly closed when an abnormality occurs inside the battery pack 100 or an emergency shutdown is required, avoiding safety hazards such as coolant leakage or overheating of the battery pack 100. This helps to protect the safety of the battery pack 100 and its surrounding equipment and reduce potential risks. By accurately controlling the flow of coolant, unnecessary waste and loss can be avoided. For example, when the temperature of the battery pack 100 is low, the flow rate of the coolant can be reduced to reduce energy consumption; when the temperature of the battery pack 100 is high, the flow rate of the coolant can be increased to improve the heat dissipation effect. This adjustment method helps to improve the energy efficiency of the battery system and reduce operating costs.

[0067] Reference Figure 1 , the battery pack 100 also includes a liquid level sensor 150, which is installed on the box 110 to detect the liquid level of the coolant. In this way, the liquid level sensor 150 can monitor the liquid level of the coolant in real time to ensure that the coolant is always kept at an appropriate level. When the liquid level is lower than or higher than the preset safety threshold, the liquid level sensor 150 can trigger the early warning system to promptly remind the operator to handle it, thereby avoiding performance degradation or safety hazards caused by insufficient or excessive coolant. By monitoring the coolant level in real time, it can be ensured that the battery pack 100 can obtain a stable cooling effect under various working conditions. This helps to improve the stability and reliability of the battery pack 100 and extend its service life. The liquid level sensor 150 can help the operator accurately control the amount of coolant added to avoid waste. Through real-time monitoring and early warning, the operator can promptly discover and solve the problem of abnormal coolant level to avoid downtime and maintenance due to faults. Abnormal coolant level may cause safety hazards such as overheating, damage, and even fire of the battery pack 100. The use of the liquid level sensor 150 can detect these potential risks in time and take corresponding measures to deal with them, thereby ensuring the safe operation of the battery pack 100.

[0068] Reference Figure 4In the embodiment of the present application, the box body 110 is further formed with an equipment cavity 117, and the equipment cavity 117 is connected to the battery cavity 111 through a mounting hole. The driving mechanism 140 is at least partially installed in the equipment cavity 117, and the driving mechanism 140 is connected to at least one of the wave-making parts 130 through the mounting hole. In this way, without affecting the heat dissipation and performance of the battery module 120, a suitable installation space is provided for the driving mechanism 140, and the overall integration of the box body 110 is improved. This design not only protects the driving mechanism 140, but also facilitates the installation, commissioning and maintenance of the driving mechanism 140. In addition, the battery pack 100 can also be made beautiful in structure. Although the driving mechanism 140 generates a certain amount of heat, since it is installed in the equipment cavity 117 and is relatively independent of the battery cavity 111, it will not have a negative impact on the heat dissipation of the battery module 120.

[0069] In one embodiment, referring to 1 and Figure 5 The box 110 is also provided with an exhaust port 118, which is connected to the battery cavity 111. In this way, the battery pack 100 generates heat during operation, resulting in an increase in the internal pressure of the box 110. The exhaust port 118 can discharge the gas in time to prevent the excessive internal pressure of the box 110 from damaging the battery module 120.

[0070] It should be noted that there are many locations for the exhaust port 118. For example, in one embodiment, the exhaust port 118 is provided on the side wall of the box 110. In the embodiment of the present application, the exhaust port 118 is provided on the top of the box 110. In this way, according to the principle that hot air rises, the exhaust port 118 is provided on the top of the box 110 to more effectively discharge the hot air in the box 110. This helps to reduce the temperature in the battery cavity 111 and ensure that the battery module 120 operates within a suitable temperature range. In addition, since there is coolant inside the battery cavity 111, arranging the exhaust port 118 at the top can prevent the coolant from overflowing during the exhaust process. Arranging the exhaust port 118 at the top can simplify the installation and maintenance process. The exhaust port 118 is provided with an exhaust valve, so that the opening and closing of the exhaust port 118 can be accurately controlled and adjusted according to the pressure and temperature conditions inside the box 110. This precise control helps maintain the stability of the internal environment of the box 110 and ensures that the battery module 120 operates in the best condition. The design of the exhaust valve can prevent the gas from flowing back into the box 110 and avoid damage to the battery module 120. By adjusting the opening degree of the exhaust valve, the noise and vibration generated during the exhaust process can be reduced. This is of great significance for improving the operating stability of the battery pack 100 and reducing noise pollution.

[0071] Reference Figure 1 , Figure 5 as well as Figure 6 In one embodiment, the box body 110 includes a base 101 and a cover body 102, and the base 101 and the cover body 102 together enclose the battery cavity 111, wherein the base 101 and the cover body 102 are detachably connected, so that the installation and removal process of the battery module 120 becomes simple and quick. This design can significantly improve work efficiency during the production, maintenance and replacement of the battery pack 100. When the battery pack 100 needs to be repaired or maintained, the cover body 102 can be easily removed to directly access the components inside the battery cavity 111. In this way, key components such as the battery module 120 can be easily inspected, cleaned or replaced, thereby extending the service life of the battery pack 100.

[0072] It should be noted that there are many ways to achieve the detachable connection between the base 101 and the cover 102. For example, the base 101 and the cover 102 can be threadedly connected or flanged, etc. Specifically, this application does not limit this.

[0073] Specifically, a sealing ring 103 is further provided between the base 101 and the cover 102, and the sealing ring 103 is sealed against the base 101 and the cover 102, respectively. Thus, the provision of the sealing ring 103 can prevent leakage of the coolant. In addition, the sealing effect of the sealing ring 103 can ensure the stability of the internal environment of the battery pack 100, thereby maintaining the stable performance of the battery module 120. Since the sealing effect of the sealing ring 103 can effectively prevent leakage of the coolant, the frequency of repair and replacement of the battery pack 100 can be reduced, thereby reducing maintenance costs.

[0074] An embodiment of the utility model further proposes an electrical device, which includes a battery pack 100 as described above. The specific structure of the battery pack 100 refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0075] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, characterized in that: include: A box body, wherein the box body is formed with a battery cavity, and a coolant is stored in the battery cavity; At least two battery modules are installed in the battery cavity, and at least two of the battery modules are arranged at intervals along a first direction; as well as, At least one wave-making portion, each of the wave-making portions is located between two adjacent battery modules and is movably installed in the battery cavity; The driving mechanism is used to drive the wave-making part to move so that at least a part of the wave-making part is suitable for moving close to or away from one of the two adjacent battery modules.

2. The battery pack according to claim 1, characterized in that: One end of at least one of the wave-making parts is rotatably installed in the battery cavity around an axis extending along a second direction, so that a portion of each of the wave-making parts is suitable for approaching or moving away from one of two adjacent battery modules, and the second direction is arranged to intersect with the first direction.

3. The battery pack according to claim 2, characterized in that: The first direction and the second direction are arranged crosswise in a horizontal plane; The wave-making part is arranged in a plate shape and extends along the second direction.

4. The battery pack according to claim 2, characterized in that: The first direction and the second direction are arranged crosswise in a horizontal plane; The other end of at least one of the wave-making parts is rotatably connected to the box body through a rotating shaft, the rotating shaft is extended along the second direction, and the rotating shaft is arranged adjacent to the top wall of the box body.

5. The battery pack according to claim 1, characterized in that: At least one of the wave-making parts is slidably installed in the battery cavity along the first direction, and the driving mechanism drives at least one of the wave-making parts to move along the first direction.

6. The battery pack according to claim 1, characterized in that: There is a gap between at least one of the wave-making parts and the bottom wall of the box.

7. The battery pack according to claim 6, characterized in that: The gap is B, wherein 3mm≤B≤6mm.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The box body is also provided with a liquid inlet and a liquid outlet. Along the first direction, the liquid inlet and the liquid outlet are respectively arranged on both sides of at least one of the wave-making parts, and the liquid inlet and the liquid outlet are both communicated with the battery cavity.

9. The battery pack according to claim 8, characterized in that: The box body comprises a first side wall and a second side wall which are arranged opposite to each other, each of the wave-making parts is extended from the first side wall to the second side wall, and the battery cavity is formed into a plurality of accommodating spaces, each of the accommodating spaces accommodating one of the battery modules; The liquid inlet and the liquid outlet are arranged on the first side wall, and the liquid inlet and the liquid outlet are communicated with different accommodating spaces; At least one of the wave-making parts is spaced apart from the second side wall, so that a communication port is formed between the at least one of the wave-making parts and the second side wall, and the communication port communicates with two adjacent accommodating spaces.

10. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

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