Battery pack and electric device

Abstract

This utility model provides a battery pack and an electrical device. The battery pack includes a battery compartment, a cell assembly, and a heating plate. The battery compartment includes a first guide plate and a second guide plate arranged opposite to each other along a first direction, with a first receiving cavity between them for accommodating a temperature regulating medium. The first guide plate includes a plurality of first through holes, which communicate with the first receiving cavity. The cell assembly is disposed in the first receiving cavity and includes a plurality of cells. The temperature regulating medium is used to regulate the temperature of the cells. The heating plate is disposed on the side of the first guide plate away from the second guide plate. A second receiving cavity is disposed between the heating plate and the first guide plate. The second receiving cavity is used to communicate with a first pipeline and is also connected to the first receiving cavity through the first through holes. The temperature regulating medium enters the first receiving cavity through the first pipeline, the second receiving cavity, and the plurality of first through holes, thereby uniformly dissipating heat from the plurality of cells in the battery assembly and improving the starting performance of the cells in low-temperature environments.

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, specifically to a battery pack and electrical equipment. Background Technology

[0002] As energy storage systems evolve towards higher power density and higher heat load, the importance of thermal management technology in ensuring the operational safety and lifespan of battery modules is becoming increasingly prominent. Among related technologies, immersion cooling systems, as a highly efficient thermal management solution, are gradually gaining attention. This solution completely immerses the battery cells in a coolant with high thermal conductivity and insulation, allowing the coolant to directly exchange heat with the cell surface, effectively reducing surface temperature differences and improving overall heat dissipation efficiency.

[0003] However, due to structural design factors such as the compact internal space of the battery module, the limited size of the liquid inlet interface, and the high density of cell arrangement, the inlet of the immersion cooling system in related technologies usually adopts a thinner pipe to connect the cavity, which causes a sudden change in cross-sectional area and produces a significant inlet effect. The liquid flow is unevenly distributed between cells, which can easily lead to problems such as insufficient local cooling and increased temperature difference between cells, thus affecting the overall thermal management performance of the immersion cooling system. Utility Model Content

[0004] Embodiments of this utility model provide a battery pack and electrical equipment for improving heat dissipation consistency between battery cells and starting performance in low-temperature environments.

[0005] To achieve the above functions, the technical solution provided in this embodiment is as follows:

[0006] In a first aspect, this embodiment provides a battery pack, including:

[0007] The battery compartment includes a first guide plate and a second guide plate disposed opposite to each other along a first direction, and a first receiving cavity is provided between the first guide plate and the second guide plate. The first receiving cavity is used to contain a temperature regulating medium. The first guide plate includes a plurality of first through holes, and the first through holes communicate with the first receiving cavity.

[0008] A battery cell assembly is disposed within the first receiving cavity, the battery cell assembly comprising a plurality of battery cells, and the temperature regulating medium is used to regulate the temperature of the battery cells;

[0009] A heating plate is disposed on the side of the first guide plate away from the second guide plate. A second receiving cavity is provided between the heating plate and the first guide plate. The second receiving cavity is used to communicate with a first pipeline. The first pipeline is used to guide the temperature regulating medium into the second receiving cavity. The second receiving cavity is connected to the first receiving cavity through the first through hole. The heating plate is used to regulate the temperature of the temperature regulating medium in the second receiving cavity.

[0010] According to one embodiment of the present invention, the battery compartment includes a first sidewall and a second sidewall disposed opposite to each other along a second direction. The first sidewall includes a second through hole and a first pipeline disposed in the second through hole. The second through hole communicates with the second receiving cavity.

[0011] The temperature regulating medium enters the second receiving cavity via the first pipeline, and then is introduced into the first receiving cavity through the plurality of first through holes.

[0012] According to one embodiment of the present invention, the battery pack further includes a baffle, which is disposed in a second receiving cavity. The second receiving cavity includes a first receiving sub-cavity and a second receiving sub-cavity. The first receiving sub-cavity is located between the baffle and the first sidewall, and the second receiving sub-cavity is located between the baffle and the second sidewall. The first receiving sub-cavity is connected to the first pipeline, and the first receiving sub-cavity and the second receiving sub-cavity are connected. The second receiving sub-cavity is connected to the first receiving cavity.

[0013] According to one embodiment of the present invention, one end of the turbulence-disrupting component is fixedly connected to the first guide plate, the other end of the turbulence-disrupting component is spaced apart from the heating plate, and the turbulence-disrupting component is spaced apart from the first through hole.

[0014] According to one embodiment of the present invention, in the first direction, the side of the turbulence member closest to the heating plate has a flow guiding opening between it and the heating plate;

[0015] The temperature regulating medium enters the first receiving sub-cavity via the first pipeline and then flows into the second receiving sub-cavity through the guide opening.

[0016] According to one embodiment of the present invention, one end of the turbulence-disrupting component is fixedly connected to the heating plate, the other end of the turbulence-disrupting component is spaced apart from the first guide plate, and the turbulence-disrupting component is spaced apart from the first through hole.

[0017] According to one embodiment of the present invention, the flow-guiding opening is provided on the side of the turbulence member near the heating plate;

[0018] The temperature regulating medium enters the first receiving sub-cavity via the first pipeline and then flows into the second receiving sub-cavity through the guide opening.

[0019] According to one embodiment of the present invention, the heating plate includes a first cover plate and a plurality of heating parts. The first cover plate is disposed opposite to and spaced apart from the first guide plate along the first direction. The plurality of heating parts are disposed on the side of the first cover plate near the first guide plate. The heating parts are located in the second accommodating cavity and are used to heat the temperature regulating medium.

[0020] According to one embodiment of the present invention, one end of the heating part is fixedly connected to the first cover plate, and the other end of the heating part is spaced apart from the first guide plate.

[0021] Secondly, this utility model also provides an electrical device, including the battery pack described in the first aspect embodiment.

[0022] The beneficial effects of the embodiments of this utility model are as follows:

[0023] The battery pack provided in this embodiment of the utility model places multiple battery cells of the battery cell assembly in the first receiving cavity of the battery compartment, and uses the first receiving cavity to contain a temperature regulating medium, so that the temperature regulating medium can regulate the temperature of the battery cells to quickly cool or heat the battery cells.

[0024] Based on this, the battery compartment is further configured with a first guide plate and a second guide plate arranged opposite to each other along a first direction. A first receiving cavity is located between the first guide plate and the second guide plate. The first guide plate includes multiple first through holes. A heating plate is located on the side of the first guide plate away from the second guide plate. A second receiving cavity is provided between the heating plate and the first guide plate. The second receiving cavity is used to communicate with the first pipeline and is connected to the first receiving cavity through the first through holes. The temperature regulating medium enters the first receiving cavity through the first pipeline, the second receiving cavity, and the first through holes, thereby uniformly dissipating heat from multiple cells in the battery assembly and improving the heat dissipation consistency and temperature uniformity among the cells. At the same time, the heating plate is used to regulate the temperature of the temperature regulating medium in the second receiving cavity to improve the response speed and operational stability of the cells in low-temperature environments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the description of the embodiment 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 these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of the present utility model;

[0027] Figure 2This is a schematic diagram of the first exploded structure of the battery pack provided in an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of a first partial cross-sectional structure of the battery pack provided in an embodiment of the present utility model.

[0029] Figure 4 A schematic diagram of the assembly structure of the battery compartment and spoiler provided in an embodiment of this utility model;

[0030] Figure 5 This is a schematic diagram of a first structure of the heating plate provided in an embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of a second exploded structure of the battery pack provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of a second partial cross-sectional structure of the battery pack provided in an embodiment of the present utility model;

[0033] Figure 8 This is a schematic diagram of the assembly structure of the heating plate and the baffle provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Battery pack; 11-Box; 12-Battery compartment; 120-First receiving cavity; 121-First guide plate; 1211-First through hole; 122-Second guide plate; 1221-Third through hole; 123-First side wall; 1231-Second through hole; 124-Second side wall; 13-Cell assembly; 131-Cell; 14-Heating plate; 141-First cover plate; 142-Heating part; 15-Breakout; 151-Guide opening; 16-First pipeline; 17-Second pipeline; 18-Second receiving cavity; 181-First receiving sub-cavity; 182-Second receiving sub-cavity; 111-Fourth through hole; 112-Fifth through hole; Z-First direction; X-Second direction; Y-Third direction. 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] Please combine Figures 1 to 5 ;in, Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the first exploded structure of the battery pack provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of a first partial cross-sectional structure of the battery pack provided in an embodiment of the present utility model. Figure 4 A schematic diagram of the assembly structure of the battery compartment and spoiler provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the first structure of the heating plate provided in an embodiment of the present utility model.

[0038] like Figures 1 to 5 As shown, in one embodiment, the battery pack 1 provided by this utility model includes a housing 11, a battery compartment 12, and a cell assembly 13. The housing 11 is provided with an installation cavity for accommodating the battery compartment 12. The battery compartment 12 is provided with a first receiving cavity 120 for accommodating a temperature regulating medium. The cell assembly 13 is disposed in the first receiving cavity 120, and the cell assembly 13 includes a plurality of cells 131. The temperature regulating medium is used to regulate the temperature of the cells 131.

[0039] Because the temperature regulating medium and the plurality of battery cells 131 exchange heat through direct contact, the heat transfer path is shortened. Compared with the heat dissipation method in related technologies that uses a liquid cooling plate in indirect contact with the battery cells 131, the heat exchange efficiency is higher, and the temperature regulation response speed of the battery cells 131 is faster, which is beneficial to improving the thermal management performance of the battery pack 1. The temperature regulating medium can cool or heat the plurality of battery cells 131, depending on the working environment of the battery cells 131. For example, when the temperature of the battery cells 131 is high, the temperature of the temperature regulating medium can be lower than the temperature of the battery cells 131, so that the temperature regulating medium absorbs the heat of the battery cells 131 and rapidly cools them down; or, when the temperature of the battery cells 131 is low, the temperature of the temperature regulating medium can be higher than the temperature of the battery cells 131, so that the temperature regulating medium transfers heat to the battery cells 131 and rapidly heats them up.

[0040] It should be noted that the temperature regulating medium can be a coolant, refrigerant, or other medium capable of regulating the temperature of the battery cell 131, and the specific type is not limited. In practical applications, the temperature regulating medium can be in a circulating state, that is, through the inlet and outlet pipes of the external cooling system, the temperature regulating medium enters the first receiving cavity 120 to exchange heat with the battery cell 131 and then is discharged, thereby achieving continuous dynamic temperature control; alternatively, the temperature regulating medium can be directly retained in the first receiving cavity 120 of the battery compartment 12, depending on the heat generation of the battery cell 131 of the battery pack 1.

[0041] Please continue to combine Figures 1 to 5 In some embodiments, the battery compartment 12 includes a first guide plate 121 and a second guide plate 122 disposed opposite to each other along a first direction Z, where the first direction Z can be the height direction of the battery pack 1. A first receiving cavity 120 is disposed between the first guide plate 121 and the second guide plate 122. The first guide plate 121 includes a plurality of first through holes 1211, which communicate with the first receiving cavity 120. The battery pack 1 also includes a heating plate 14 disposed distal to the first guide plate 121. On one side away from the second guide plate 122, a second receiving cavity 18 is provided between the heating plate 14 and the first guide plate 121. The second receiving cavity 18 is used to communicate with the first pipeline 16, and the second receiving cavity 18 is connected to the first receiving cavity 120 through the first through hole 1211. The temperature regulating medium can enter the second receiving cavity 18 through the first pipeline 16, and then be introduced into the first receiving cavity 120 through the plurality of first through holes 1211 to contact the surface of the plurality of battery cells 131 to achieve temperature regulation.

[0042] It is understood that, since the first guide plate 121 includes multiple first through holes 1211, the temperature regulating medium can flow into the first receiving cavity 120 simultaneously through multiple first through holes 1211 in a multi-point manner. Each first through hole 1211 shares part of the flow, thereby making the distribution of the temperature regulating medium entering the first receiving cavity 120 more uniform, effectively balancing the pressure gradient and flow velocity field in the cavity, and avoiding the problem of the temperature regulating medium being concentrated in a certain through hole, resulting in excessive or insufficient flow in a local area; thereby improving the flow field distribution and enhancing the heat exchange efficiency and temperature consistency among the multiple cells 131; it should be noted that the first pipeline 16 can be the liquid inlet pipeline of the temperature regulating medium.

[0043] Furthermore, compared to the flow through a single through-hole, multiple first through-holes 1211 can disperse the flow of the temperature regulating medium into multiple smaller flow channels, allowing the temperature regulating medium to enter the first receiving cavity 120 at a lower speed and in a more stable state during the flow process. This avoids turbulence or flow around the flow that may be caused by excessively high local flow velocities. As a result, the temperature regulating medium flows more evenly into the first receiving cavity 120 through the first through-holes 1211 in the second receiving cavity 18, thereby covering the surface of the multiple battery cells 131 and further improving the heat exchange efficiency and the overall cooling (or heating) effect.

[0044] Additionally, when the temperature regulating medium enters the second receiving cavity 18 via the first pipeline 16, the heating plate 14 can heat the temperature regulating medium within the second receiving cavity 18. When the battery cell 131 is in a low-temperature environment (e.g., below 0°C), its internal electrochemical reaction rate slows down, and its internal resistance increases significantly. Direct charging and discharging can easily lead to a decrease in discharge capacity and a voltage plateau shift, affecting the battery cell 131's lifespan and safety. Therefore, to ensure the normal startup and operation of the battery cell 131 under low-temperature conditions, the environment surrounding the battery cell 131 needs to be preheated to allow the battery cell 131's temperature to preferentially rise to a safe startup threshold (e.g., above 15°C).

[0045] It is understood that the second receiving cavity 18 formed between the heating plate 14 and the first guide plate 121 can serve as a preheating area for the temperature regulating medium. When the temperature regulating medium at low temperature flows into the second receiving cavity 18, it can be heated to a set temperature by the heating plate 14 in the second receiving cavity 18 and then introduced into the first receiving cavity 120 through the plurality of first through holes 1211. By preheating the temperature regulating medium before it enters the first receiving cavity 120 and contacts the battery cell 131, the ambient temperature around the battery cell 131 can be rapidly increased in a low-temperature environment, thereby improving the starting performance of the battery cell 131, shortening the preheating time, and improving the energy output stability of the battery cell 131 under low-temperature conditions.

[0046] Furthermore, since the heating plate 14 is located upstream of the liquid flow path of the temperature regulating medium, it can ensure that the temperature regulating medium flowing into the first receiving cavity 120 is all subjected to temperature control treatment, thereby improving the temperature uniformity of the cell assembly 13, shortening the preheating time, and enhancing the adaptability of the battery pack 1 in low-temperature environments.

[0047] Please continue to combine Figures 1 to 5 In some embodiments, the battery compartment 12 includes a first sidewall 123 and a second sidewall 124 disposed opposite each other along a second direction X. The first sidewall 123 includes a second through hole 1231 and a first pipe 16 disposed within the second through hole 1231. The first pipe 16 is used to introduce the temperature regulating medium into the interior of the battery compartment 12. The first pipe 16 can be an entry channel for the temperature regulating medium. The temperature regulating medium enters the second receiving cavity 18 via the first pipe 16 and is then introduced into the first receiving cavity 120 through the plurality of first through holes 1211. The plurality of first through holes 1211 are distributed along the surface of the first guide plate 121, so that the heated temperature regulating medium presents a more uniform diffusion path when flowing into the first receiving cavity 120, reducing the surface temperature difference of the battery cell 131 caused by local high or low flow rates, improving heat exchange uniformity, and thus improving the consistency of the performance of the battery cell 131.

[0048] It should be noted that the second direction X intersects with the first direction Z, and the second direction X can be perpendicular to the first direction Z. The second direction X can be the length direction of the battery pack 1.

[0049] It is understandable that, since the first pipe 16 is located at the first side wall 123 of the battery compartment 12, it has greater layout flexibility and accessibility compared to setting the pipe at the top or bottom of the battery compartment 12. This is beneficial for the installation, disassembly and subsequent maintenance of the first pipe 16, and is especially suitable for battery pack 1 designs with relatively flat structures or height restrictions.

[0050] Furthermore, by providing the first pipe 16 within the second through hole 1231 of the first sidewall 123, the lateral introduction design ensures that the liquid inlet path of the temperature regulating medium is perpendicular to the arrangement direction of the battery cells 131, which helps the temperature regulating medium to form a uniform lateral diffusion flow field within the first receiving cavity 120, further improving the heat exchange uniformity of the surfaces of the multiple battery cells 131.

[0051] Please continue to combine Figures 1 to 5 In some embodiments, the battery pack 1 further includes a flow deflector 15 disposed within the second receiving cavity 18, which guides and disperses the temperature regulating medium flowing into the second receiving cavity 18, thereby adjusting the flow path of the temperature regulating medium within the second receiving cavity 18, controlling the flow rate, and improving the uniformity of subsequent fluid distribution.

[0052] Furthermore, the flow-deflecting element 15 can be disposed on the side of the first guide plate 121 near the heating plate 14. The flow-deflecting element 15 is spaced apart from the heating plate 14 and spaced apart from the first through hole 1211. By placing the flow-deflecting element 15 at a position before the temperature regulating medium flows to the first through hole 1211, the temperature regulating medium can be pre-guided and its velocity dispersed, avoiding the temperature regulating medium from directly impacting the first through hole 1211 before it has fully diffused, thereby improving the uniformity of the temperature regulating medium distribution when it passes through the first guide plate 121.

[0053] Specifically, the flow-disrupting element 15 is provided within the second receiving cavity 18, such that the second receiving cavity 18 is divided by the flow-disrupting element 15 into a first receiving sub-cavity 181 and a second receiving sub-cavity 182 that are interconnected. The first receiving sub-cavity 181 is located between the flow-disrupting element 15 and the first sidewall 123, and the distance between the flow-disrupting element 15 and the first sidewall 123 is greater than or equal to 15 mm and less than or equal to 25 mm. The first receiving sub-cavity 181 is connected to the first pipeline 16 and is used to receive the temperature regulating medium introduced by the first pipeline 16. The temperature regulating medium first enters the first receiving sub-cavity 181 through the first through hole 1211. The arrangement of the first receiving sub-cavity 181 plays a buffering and guiding role, so that the temperature regulating medium has a preliminary flow velocity distribution and pressure equalization before entering the second receiving sub-cavity 182, which helps to control the pressure difference on both sides of the flow-disrupting element 15, so that the temperature regulating medium can pass through the flow-disrupting element 15 more stably and enter the second receiving sub-cavity 182.

[0054] Furthermore, the second receiving sub-cavity 182 is located between the baffle 15 and the second sidewall 124. The second receiving sub-cavity 182 is connected to the first receiving sub-cavity 181, allowing the temperature regulating medium flowing into the first receiving sub-cavity 181 to flow through the baffle 15 into the second receiving sub-cavity 182. The baffle 15 guides and disperses the temperature regulating medium flowing into the second receiving sub-cavity 182, reducing the flow velocity of the temperature regulating medium at the initial position of entering the second receiving sub-cavity 182. This avoids impact turbulence caused by excessive local flow, achieving guidance and distribution control of the temperature regulating medium and improving the uniformity of the flow path of the temperature regulating medium in the second receiving sub-cavity 182. In addition, the temperature regulating medium flowing into the second receiving sub-cavity 182 can be dispersed and introduced into the first receiving cavity 120 through the multiple first through holes 1211, and directly contact the surface of the battery cell 131 for heat exchange.

[0055] It should be noted that, in the first direction Z, the side of the flow-dispersing element 15 closest to the heating plate 14 has a flow-guiding opening 151 between it and the heating plate 14. The flow-guiding opening 151 provides a communication channel for the temperature-regulating medium, allowing it to flow from the first receiving sub-cavity 181 to the second receiving sub-cavity 182. After entering the first receiving sub-cavity 181 via the first pipe 16, the temperature-regulating medium first forms a preliminary buffer and stabilizes its flow rate within the first receiving sub-cavity 181, and then flows into the second receiving sub-cavity 182 through the flow-guiding opening 151. During the flow into the second receiving sub-cavity 182, the temperature-regulating medium, guided by the flow-dispersing element 15, flows through the heating plate 14, achieving thorough and uniform heating.

[0056] It is understood that the turbulence-inducing element 15 helps to prolong the residence time of the temperature-regulating medium in the second receiving cavity 18, thereby improving the heat exchange efficiency. At the same time, it suppresses turbulence caused by local high flow rates, ensuring that the temperature-regulating medium subsequently entering the first receiving cavity 120 has better temperature consistency and thermal stability.

[0057] In addition, the flow-deflecting element 15 further improves the flow field distribution of the temperature regulating medium before it is introduced into the first receiving cavity 120, so that the temperature regulating medium forms a multi-point uniform penetration at the multiple first through holes 1211 of the first guide plate 121, reducing the surface temperature difference between the cells 131 caused by the uneven distribution of the temperature regulating medium, improving the temperature consistency and heat exchange efficiency of the cells 131, and thus improving the thermal management performance and reliability of the battery pack 1 under high heat load or low temperature environment.

[0058] It is understood that, in this embodiment, by providing a turbulence-dispersing element 15 in the second receiving cavity 18, the second receiving cavity 18 is divided into the first receiving sub-cavities 181 and the second receiving sub-cavities 182 connected in series, so that the temperature regulating medium undergoes a gradual flow path of "inlet-turbulence-diversion-outlet" during the flow process; this "gradual liquid flow path" prolongs the heat transfer path of the temperature regulating medium, increases the residence time of the temperature regulating medium near the heating plate 14, and enhances the preheating effect.

[0059] Meanwhile, within the second receiving cavity 18, the temperature regulating medium comes into contact with the heating plate 14. Through the guiding effect of the flow-dispersing element 15, the instantaneous flow velocity of the temperature regulating medium when entering the second receiving sub-cavity 182 is reduced, avoiding flow concentration and reducing impact turbulence. This allows the temperature regulating medium to be fully guided and dispersed by the flow-dispersing element 15, and then pass through the second receiving sub-cavity 182 at a uniform speed and flow rate, thereby improving the heating efficiency of the temperature regulating medium and avoiding uneven heating caused by flow velocity differences.

[0060] Please continue to combine Figures 1 to 5 In some embodiments, the heating plate 14 includes a first cover plate 141 and a plurality of heating parts 142. The first cover plate 141 is opposite to and spaced apart from the first guide plate 121 along the first direction Z, thereby forming a second receiving cavity 18 between the first cover plate 141 and the first guide plate 121. The plurality of heating parts 142 are disposed on the side of the first cover plate 141 near the first guide plate 121. The heating parts 142 are located in the second receiving cavity 18 and are used to heat the temperature regulating medium flowing through the second receiving cavity 18.

[0061] Specifically, the plurality of heating elements 142 can be arranged in an array on a reference plane formed by the second direction X and the third direction Y. The third direction Y intersects with the second direction X and can be perpendicular to the first direction Z. The third direction Y can be the width direction of the battery pack 1. The shape of the heating element 142 can be any one of cylindrical, sheet-like, or annular, or a combination of the above shapes. In the first direction Z, the height of the heating element 142 is greater than or equal to 20 mm and less than or equal to 25 mm, so that the heating element 142 can be directly placed in the mainstream path of the temperature regulating medium, so that heat can be quickly transferred to the temperature regulating medium, thereby improving the heating response speed and overall heat transfer efficiency.

[0062] Furthermore, the plurality of heating elements 142 are spaced apart, and the arrangement of the plurality of heating elements 142 can be designed in conjunction with the flow path of the temperature regulating medium. For example, they can be evenly distributed along the liquid flow direction of the temperature regulating medium or reinforced in local areas where temperature difference zones are easily formed, thereby achieving more uniform heating of the temperature regulating medium, improving the temperature consistency of the temperature regulating medium flowing into the first receiving cavity 120, improving the starting performance and operational stability of the cell assembly 13 in low-temperature environments, and thus improving the safety and thermal management efficiency of the battery pack 1.

[0063] In addition, one end of the heating part 142 is fixedly connected to the first cover plate 141, thereby fixing the heating part 142. The other end of the heating part 142 is spaced apart from the first guide plate 121, thereby avoiding direct contact between the heating part 142 and the first guide plate 121, so that an effective flow gap is formed between the heater and the first guide plate 121, and the temperature regulating medium can flow fully around the heating part 142 and exchange heat with it.

[0064] It is understood that by fixing one end of the heating part 142 to the first cover plate 141 and the other end of the heating part 142 to the first guide plate 121 at intervals, this embodiment not only achieves the stable installation of the heating part 142, but also improves the heat exchange efficiency per unit volume without interfering with the flow of the temperature regulating medium. This helps to uniformly heat the temperature regulating medium in the second accommodating cavity 18, thereby further improving the thermal response speed and temperature control accuracy of the battery pack 1.

[0065] Please continue to combine Figures 1 to 5 In some embodiments, the second guide plate 122 includes a plurality of third through holes 1221 for providing a discharge path for the temperature regulating medium. After the temperature regulating medium completes heat exchange with the cell assembly 13, it can flow out from the first receiving cavity 120 through the plurality of third through holes 1221 and enter the drain structure or circulation loop connected to the outlet of the battery pack 1, so that the temperature regulating medium can be discharged in an orderly manner after completing the heat exchange process, thereby avoiding the accumulation of heat or local temperature rise caused by the retention of the temperature regulating medium.

[0066] Specifically, a fourth through hole 111 and a fifth through hole 112 may be provided on the inner wall of the housing 11 near the first pipe 16, and the fourth through hole 111 is provided corresponding to the first pipe 16. A second pipe 17 is provided in the fifth through hole 112. The second pipe 17 is used to guide the temperature regulating medium after heat exchange from the first receiving cavity 120 to be discharged from the housing 11 through the third through hole 1221, and can be further connected to a circulation system or a cooling unit. It should be noted that the second pipe 17 can be the liquid outlet pipe of the temperature regulating medium.

[0067] It is understood that by setting a second pipe 17 opposite to the first pipe 16 in the housing 11, a stable, closed and clearly directional liquid flow path can be formed, so that the temperature regulating medium can complete a complete heat exchange path from the inlet to the outlet between the battery cell assemblies 13, thereby improving the circulation efficiency of the temperature regulating medium.

[0068] Please continue to combine Figure 1 , Figure 6 , Figure 7 and Figure 8 ;in, Figure 6 This is a schematic diagram of a second exploded structure of the battery pack provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of a second partial cross-sectional structure of the battery pack provided in an embodiment of the present utility model; Figure 8 This is a schematic diagram of the assembly structure of the heating plate and the baffle provided in an embodiment of the present invention.

[0069] like Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the battery pack 1 further includes a flow disruptor 15 disposed within the second receiving cavity 18, which is used to guide and disperse the temperature regulating medium flowing into the second receiving cavity 18, thereby adjusting the flow path of the temperature regulating medium within the second receiving cavity 18, controlling the flow rate, and improving the uniformity of subsequent fluid distribution.

[0070] Furthermore, the flow-deflecting element 15 is disposed on the side of the heating plate 14 near the first guide plate 121. One end of the flow-deflecting element is fixedly connected to the heating plate 14, and the other end of the flow-deflecting element is spaced apart from the first guide plate 121. The flow-deflecting element 15 is also spaced apart from the first through hole 1211. This arrangement positions the flow-deflecting element 15 before the temperature regulating medium flows to the first through hole 1211, thus pre-guiding and dispersing the velocity of the temperature regulating medium. This prevents the temperature regulating medium from directly impacting the first through hole 1211 before it has fully diffused, which could cause uneven flow or local turbulence. This improves the flow uniformity of the temperature regulating medium as it passes through the first guide plate 121, further enhancing the temperature distribution consistency of the temperature regulating medium within the first accommodating cavity 120 and strengthening the heat exchange effect between the battery cells 131.

[0071] Specifically, the flow-deflecting element 15 has a flow-guiding opening 151 on the side near the heating plate 14. The flow-guiding opening 151 provides a communication channel for the temperature-regulating medium, allowing it to flow from the first receiving sub-cavity 181 to the second receiving sub-cavity 182. After entering the first receiving sub-cavity 181 via the first pipe 16, the temperature-regulating medium first forms a preliminary buffer and stabilizes its flow rate in the first receiving sub-cavity 181, and then flows into the second receiving sub-cavity 182 through the flow-guiding opening 151. During the flow into the second receiving sub-cavity 182, the temperature-regulating medium is guided by the flow-deflecting element 15 and flows through the heating plate 14, achieving sufficient and uniform heating treatment.

[0072] It is understood that after the temperature regulating medium enters the first receiving sub-cavity 181 via the first pipeline 16, it can flow into the second receiving sub-cavity 182 through the flow guide opening 151 opened on the baffle 15 under the guidance of the baffle 15. This allows the temperature regulating medium to undergo preliminary diversion and buffering before entering the second receiving sub-cavity 182, which helps to reduce flow velocity fluctuations and avoid the formation of local impact flow, thereby improving the flow uniformity and heat exchange efficiency of the temperature regulating medium in the second receiving sub-cavity 182.

[0073] This embodiment also provides an electrical device, which includes the battery pack 1 described in any of the above embodiments. The battery pack 1 can be used as a power supply for the electrical device. It is understood that the battery pack 1 has been described in detail in the above embodiments and will not be repeated here. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0074] It should be noted that the type of electrical equipment can be selected as needed. For example, the electrical equipment may include at least one of vehicles, energy storage power supplies, consumer electronics, medical devices, or smart cities. Specifically, this embodiment does not limit the type of electrical equipment.

[0075] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack (1), characterized in that, include: The battery compartment (12) includes a first guide plate (121) and a second guide plate (122) arranged opposite to each other along a first direction (Z). A first receiving cavity (120) is provided between the first guide plate (121) and the second guide plate (122). The first receiving cavity (120) is used to receive a temperature regulating medium. The first guide plate (121) includes a plurality of first through holes (1211). The first through holes (1211) communicate with the first receiving cavity (120). A battery cell assembly (13) is disposed in the first receiving cavity (120). The battery cell assembly (13) includes a plurality of battery cells (131). The temperature regulating medium is used to regulate the temperature of the battery cells (131). A heating plate (14) is disposed on the side of the first guide plate (121) away from the second guide plate (122). A second receiving cavity (18) is provided between the heating plate (14) and the first guide plate (121). The second receiving cavity (18) is used to communicate with the first pipeline (16). The first pipeline (16) is used to guide the temperature regulating medium into the second receiving cavity (18). The second receiving cavity (18) is connected to the first receiving cavity (120) through the first through hole (1211). The heating plate (14) is used to regulate the temperature of the temperature regulating medium in the second receiving cavity (18).

2. The battery pack (1) according to claim 1, characterized in that, The battery compartment (12) includes a first sidewall (123) and a second sidewall (124) disposed opposite each other along a second direction (X). The first sidewall (123) includes a second through hole (1231) and a first pipe (16) disposed in the second through hole (1231). The second through hole (1231) communicates with the second receiving cavity (18). The temperature regulating medium enters the second receiving cavity (18) via the first pipeline (16) and is then introduced into the first receiving cavity (120) through the plurality of first through holes (1211).

3. The battery pack (1) according to claim 2, characterized in that, The battery pack (1) further includes a baffle (15) disposed in a second receiving cavity (18). The second receiving cavity (18) includes a first receiving sub-cavity (181) and a second receiving sub-cavity (182). The first receiving sub-cavity (181) is located between the baffle (15) and the first sidewall (123). The second receiving sub-cavity (182) is located between the baffle (15) and the second sidewall (124). The first receiving sub-cavity (181) is connected to the first pipeline (16). The first receiving sub-cavity (181) and the second receiving sub-cavity (182) are connected. The second receiving sub-cavity (182) and the first receiving cavity (120) are connected.

4. The battery pack (1) according to claim 3, characterized in that, One end of the turbulence-disrupting element (15) is fixedly connected to the first guide plate (121), the other end of the turbulence-disrupting element (15) is spaced apart from the heating plate (14), and the turbulence-disrupting element (15) is spaced apart from the first through hole (1211).

5. The battery pack (1) according to claim 3, characterized in that, In the first direction (Z), the side of the baffle (15) near the heating plate (14) has a flow guide opening (151) between it and the heating plate (14); The temperature regulating medium enters the first receiving sub-cavity (181) through the first pipeline (16) and then flows into the second receiving sub-cavity (182) through the flow guide opening (151).

6. The battery pack (1) according to claim 3, characterized in that, One end of the turbulence-disrupting element (15) is fixedly connected to the heating plate (14), the other end of the turbulence-disrupting element (15) is spaced apart from the first guide plate (121), and the turbulence-disrupting element (15) is spaced apart from the first through hole (1211).

7. The battery pack (1) according to claim 6, characterized in that, The turbulence-disrupting component (15) has a flow-guiding opening (151) on the side near the heating plate (14); The temperature regulating medium enters the first receiving sub-cavity (181) through the first pipeline (16) and then flows into the second receiving sub-cavity (182) through the flow guide opening (151).

8. The battery pack (1) according to claim 1, characterized in that, The heating plate (14) includes a first cover plate (141) and a plurality of heating parts (142). The first cover plate (141) is opposite to and spaced apart from the first guide plate (121) along the first direction (Z). The plurality of heating parts (142) are located on the side of the first cover plate (141) near the first guide plate (121). The heating parts (142) are located in the second receiving cavity (18). The heating parts (142) are used to heat the temperature regulating medium.

9. The battery pack (1) according to claim 8, characterized in that, One end of the heating part (142) is fixedly connected to the first cover plate (141), and the other end of the heating part (142) is spaced apart from the first guide plate (121).

10. An electrical appliance, characterized in that, Includes the battery pack (1) as described in any one of claims 1 to 9.

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