Battery device, heat exchange component and electric device

Abstract

The present application belongs to the technical field of battery production. Provided are a battery device, a heat exchange component and an electric device. The battery device comprises a battery cell assembly and a refrigerant heat exchange component, wherein a refrigerant heat exchange flow channel is provided in the refrigerant heat exchange component; the refrigerant heat exchange component comprises a first heat exchange region, which is configured to perform heat exchange with the battery cell assembly; the refrigerant heat exchange flow channel located in the first heat exchange region is symmetrical about a first axis, the first axis being the central axis of the refrigerant heat exchange component in the direction of width; and a refrigerant heat exchange medium flows in and out at positions, symmetrical with respect to the first axis, of the refrigerant heat exchange flow channel located in the first heat exchange region and on two sides of the first axis. The present invention aims to solve the technical problem of poor temperature uniformity of the battery cell assembly caused by the heat exchange component in the battery device.

Description

Battery devices, heat exchange components and electrical appliances

[0001] This application claims priority to Chinese Patent Application No. 202510199549.6, filed with the State Intellectual Property Office of China on February 21, 2025, entitled "Battery Device, Heat Exchange Component and Electrical Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery manufacturing technology, and in particular to a battery device, a heat exchange component, and an electrical device. Background Technology

[0003] With the continuous development of new energy technologies, battery devices are being applied to more and more industries. Since battery devices need to operate within a certain temperature range, temperature has a significant impact on the battery. In particular, excessively high temperatures can lead to thermal runaway. Therefore, it is necessary to regulate the battery's own temperature during operation.

[0004] In related technologies, the heat exchange components have an uneven heat exchange problem with the battery cells, which causes some battery cells to overheat, resulting in a large amount of heat accumulating inside the battery device, thereby affecting the performance and lifespan of the battery device. Summary of the Invention

[0005] In view of the above problems, the purpose of this application is to provide a battery device, a heat exchange component, and an electrical device, which aims to solve the technical problem of poor temperature uniformity of battery cells and components caused by the heat exchange component in the battery device. Technical solutions

[0006] To address the aforementioned problems, in a first aspect, this application provides a battery device, comprising:

[0007] Battery cell modules; and

[0008] A refrigerant heat exchange component is provided with a refrigerant heat exchange channel. The refrigerant heat exchange component includes a first heat exchange region configured to exchange heat with the battery cell assembly. The refrigerant heat exchange channel located within the first heat exchange region is symmetrical about a first axis, which is the central axis of the refrigerant heat exchange component in the width direction. The refrigerant heat exchange channel located within the first heat exchange region and on both sides of the first axis flows into and out of the refrigerant heat exchange medium at positions symmetrical to the first axis.

[0009] The advantage of this embodiment is that not only is the flow channel structure within the first heat exchange region symmetrical, but the flow direction and trajectory of the refrigerant heat exchange medium within the flow channel are also symmetrical. This ensures that the heat exchange capacity at symmetrical positions is balanced. When the battery cell assembly exchanges heat with the first heat exchange region, balanced heat exchange can be achieved, maximizing temperature uniformity on both sides of the battery cell assembly. Specifically, when the battery cell assembly is positioned corresponding to the first heat exchange region, the battery cell assemblies on both sides of the first axis are also symmetrical. That is, the battery cell assembly can have an equal number of battery cells arranged in the same way on both sides of the first axis, and the battery cells on both sides have equal heat exchange effects.

[0010] In one embodiment of the first aspect, the refrigerant heat exchange component further includes an inlet channel and an outlet channel. The inlet channel is used to allow refrigerant heat exchange medium to flow into the refrigerant heat exchange channel within the first heat exchange region. The outlet channel is used to allow refrigerant heat exchange medium to flow out of the refrigerant heat exchange channel within the first heat exchange region. The position where the refrigerant heat exchange channel within the first heat exchange region connects directly or through an extension channel on the inlet channel is the inlet position, and the position where it connects on the outlet channel is the outlet position. The distance between at least one side of the refrigerant heat exchange component and the inlet position is greater than the distance between the inlet position and the outlet position.

[0011] The advantage of this embodiment is that the temperature of the medium at the outlet is higher than that at the inlet, so the outlet is set closer to the edge and the inlet is set closer to the center, which is beneficial for heat dissipation in the central heat-concentrated area of ​​the battery cell assembly.

[0012] In one embodiment of the first aspect, the refrigerant heat exchange component further includes a second heat exchange region, wherein the refrigerant heat exchange channel in the second heat exchange region is connected to the refrigerant heat exchange channel in the first heat exchange region so that the refrigerant heat exchange medium flows into and out of the refrigerant heat exchange channel in the first heat exchange region.

[0013] The advantage of this embodiment is that the second heat exchange zone provides the refrigerant heat exchange medium with an inflow and outflow structure for the refrigerant heat exchange medium in the first heat exchange zone, enabling the refrigerant heat exchange medium to circulate. In this embodiment, the inflow and outflow channels of the refrigerant heat exchange medium are set separately in the second heat exchange zone, thus avoiding interference with the channel arrangement in the first heat exchange zone. By setting the inflow and outflow channels in a separate area, the refrigerant heat exchange channels in the first heat exchange zone can be symmetrically arranged as needed.

[0014] In one embodiment of the first aspect, a heat exchange surface is formed on the refrigerant heat exchange component at least corresponding to the first heat exchange region, the heat exchange surface being used to contact the battery cell assembly or to be disposed adjacent to the battery cell assembly.

[0015] This embodiment provides a heat exchange method through a heat exchange surface. The heat exchange surface is a flat surface that can make good contact with the battery cell assembly and achieve a better heat exchange effect.

[0016] In one embodiment of the first aspect, the refrigerant heat exchange channel within the first heat exchange region and located on the same side of the first axis includes multiple unit channels with the same or different structures, and the structures of two of the unit channels located on opposite sides of the first axis and in corresponding positions are symmetrical about the first axis.

[0017] The effect of this embodiment is that the heat exchange capacity of the refrigerant heat exchange channels on both sides of the first axis is consistent, and the heat exchange capacity of the unit channels located at the corresponding positions is the same. The corresponding positions can be symmetrical positions or positions with equal vertical distances to the first axis. When the battery cell assembly performs heat exchange, the equivalent heat exchange of the battery cells on both sides of the battery cell assembly can be achieved.

[0018] In one embodiment of the first aspect, the refrigerant heat exchange channel in the second heat exchange region includes an inlet channel and an outlet channel. The unit channels located on the same side of the first axis in the first heat exchange region share the same inlet channel to enter the refrigerant heat exchange medium and share the same outlet channel to exit the refrigerant heat exchange medium.

[0019] This embodiment provides that unit channels located on the same side of the first axis share the same inlet channel. This is because, under normal circumstances, the refrigerant heat exchange medium in the same inlet channel has the same properties, i.e., the heat exchange effect is the same, such as flow rate and temperature. When all unit channels on the same side share a single inlet channel, the refrigerant heat exchange medium entering each unit channel can be more accurately controlled. For example, the order in which the refrigerant heat exchange medium flows from the same inlet channel to each unit channel on the same side can be controlled. This allows for a certain degree of control over the heat exchange capacity of each unit channel on the same side. Furthermore, the refrigerant heat exchange medium in each unit channel on the same side can also flow out through the same outlet channel, simplifying the structure.

[0020] In one embodiment of the first aspect, the unit flow channels located on different sides of the first axis enter the refrigerant heat exchange medium through different inlet flow channels and exit the refrigerant heat exchange medium through different outlet flow channels.

[0021] This embodiment provides that the refrigerant heat exchange medium flows into the unit flow channels on different sides through different inlet flow channels. The effect of this is to increase the heat exchange capacity, which is stronger than using the same inlet flow channel on both sides at the same time, that is, to increase the inflow of refrigerant heat exchange medium. The unit flow channels on both sides enter the refrigerant heat exchange medium through different inlet flow channels, but these different inlet flow channels should be set as much as possible so that the various properties of the internal refrigerant heat exchange medium are the same. For example, they can be two inlet flow channels formed by splitting the same main flow channel.

[0022] In one embodiment of the first aspect, a plurality of unit channels located on the same side of the first axis in the flow direction of the inlet channel are connected to the inlet channel in sequence from upstream to downstream. The order in which any one of the unit channels is connected to the inlet channel in the plurality of unit channels on its side is marked as N. The order marking N corresponding to two unit channels located on both sides of the first axis and symmetrically arranged is the same.

[0023] Therefore, in this embodiment, the unit flow channels in symmetrical positions are connected in the same order, which results in the acquisition of refrigerant heat exchange medium with approximately the same indicators, such as quantity, flow rate, and temperature. This further enhances the balance of heat exchange capacity of the refrigerant heat exchange channels on both sides of the first axis, which is beneficial for balanced heat exchange of battery cell components during heat exchange.

[0024] In one embodiment of the first aspect, the inlet channel has an inlet, and the connection positions of two unit channels located on both sides of the first axis and symmetrically arranged on the inlet channel are equidistant from the inlet in the length extension direction of the inlet channel.

[0025] Because the distance is equal, the two unit channels can better obtain the same refrigerant heat exchange medium with the same specifications, so that the refrigerant heat exchange medium flowing into the two unit channels at symmetrical positions is the same, thus enabling the symmetrical unit channels to obtain the same heat exchange capacity.

[0026] In one embodiment of the first aspect, the distance S between the connection position of the unit channel on the inlet channel and the inlet in the length extension direction of the inlet channel is S. The multiple unit channels located on the same side of the first axis are arranged sequentially along a direction perpendicular to the first axis, and the S values ​​corresponding to the multiple unit channels arranged sequentially from near to far from the first axis increase sequentially.

[0027] The effect of this embodiment is that the heat exchange capacity of the unit flow channel at different locations is matched with the heat of different areas of the battery cell assembly, which helps to keep the temperature of the battery cell assembly uniform.

[0028] In one embodiment of the first aspect, the unit flow channel includes an upstream flow channel and a downstream flow channel that are connected to each other, the upstream flow channel and the downstream flow channel are parallel to the first axis, and the upstream flow channel and the downstream flow channel of two adjacent unit flow channels located on the same side of the first axis are configured adjacently.

[0029] The effect of this embodiment is that, for a certain unit flow channel, the upstream flow channel has a stronger heat exchange capacity than the downstream flow channel, that is, its temperature is relatively lower. Therefore, by arranging the upstream and downstream flow channels of two adjacent unit flow channels adjacent to each other, the heat can be made more uniform to a certain extent, and overheated and overcooled areas will not be formed.

[0030] In one embodiment of the first aspect, the upstream channels of two unit channels located on both sides of the first axis and adjacent to the first axis are arranged adjacently.

[0031] Therefore, the effect of this embodiment is that it can effectively exchange heat in the middle area of ​​the battery cell assembly, preventing the temperature in the middle area of ​​the battery cell assembly from becoming too high.

[0032] In one embodiment of the first aspect, the downstream channel of a single unit channel is located on the side of the unit channel away from the first axis.

[0033] The downstream flow channel of a single unit flow channel has a higher temperature than the upstream flow channel of the same unit flow channel, meaning its heat exchange capacity is lower. Therefore, it is set away from the first axis, which corresponds to the central region of the battery cell module. This avoids the situation where the heat exchange capacity of the unit flow channel near the central region of the battery cell module is low, which is conducive to the temperature balance of the battery cell module.

[0034] In one embodiment of the first aspect, the unit flow channel further includes a return flow channel communicating with a downstream flow channel of the unit flow channel, the return flow channel being used to connect with the refrigerant heat exchange channel in the second heat exchange region to allow the refrigerant heat exchange medium to flow out.

[0035] This embodiment provides a unit flow channel that also includes a return flow channel. The return flow channel is connected to the downstream flow channel and the refrigerant heat exchange flow channel of the second heat exchange zone. Since the refrigerant heat exchange medium flowing out of the unit flow channel must return, and since the refrigerant temperature rises significantly during the return stage, it does not play a significant role in heat exchange. Therefore, a separate return flow channel is provided for the return flow. Since the heat exchange capacity decreases, the position of the return flow channel can be set separately to avoid the main heat exchange location. This can reduce the impact of the refrigerant during the return stage on the heat exchange effect.

[0036] In one embodiment of the first aspect, the return flow channel includes a return section parallel to the first axis, and multiple return sections of multiple unit channels located on the same side of the first axis are arranged adjacently and located in the end region of the first heat exchange region away from the first axis. The region of the first heat exchange region other than the end region is used for heat exchange with the battery cell assembly.

[0037] The advantage of this embodiment is that by placing the main part of the return flow channel outside the area that participates in heat exchange, it does not participate in heat exchange, thus reducing the impact on the temperature uniformity of the battery cell module.

[0038] In one embodiment of the first aspect,

[0039] In the direction perpendicular to the first axis:

[0040] The distance between adjacent recirculation sections located on the same side of the first axis is L1;

[0041] The upstream flow channel of the same unit flow channel includes multiple upstream branch channels parallel to the first axis, and the distance between adjacent upstream branch channels is L2;

[0042] The downstream flow channel of the same unit flow channel includes multiple downstream branch channels parallel to the first axis, and the distance between adjacent downstream branch channels is L3;

[0043] Therefore, L1 is less than L2 and L1 is less than L3.

[0044] The advantage of this embodiment is that, due to the denser arrangement of the recirculation sections, the impact on the temperature uniformity of the battery cell assembly is reduced.

[0045] In one embodiment of the first aspect, the battery cell assembly includes a plurality of battery cells arranged along the first axis and in a direction perpendicular to the first axis.

[0046] The effect of this embodiment is that the arrangement of the battery cells in the battery cell assembly conforms to the structural layout of the refrigerant heat exchange channel provided in this embodiment, which can play a maximum role and ensure the temperature uniformity of the battery cell assembly.

[0047] In one embodiment of the first aspect, the battery device further includes a housing having a accommodating space, wherein the refrigerant heat exchange component is located within the accommodating space or serves as a side panel to form the housing, and the refrigerant heat exchange component is used to contact the battery cell assembly.

[0048] The advantage of this embodiment is that the assembly structure of the refrigerant heat exchange component within the battery device is simple and reasonable, and easy to use.

[0049] Secondly, this application also provides an embodiment of a heat exchange component, including the refrigerant heat exchange component provided in any of the above embodiments.

[0050] Thirdly, this application also provides an embodiment of an electrical device, including the battery device provided in any of the above embodiments, the battery device being used to store or provide electrical energy.

[0051] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0052] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0054] Figure 2 is an exploded structural diagram of a battery device provided in some embodiments of this application;

[0055] Figure 3 is an exploded structural diagram of a refrigerant heat exchange component provided in some embodiments of this application;

[0056] Figure 4 is a schematic diagram of the refrigerant heat exchange channel structure of the refrigerant heat exchange component provided in some embodiments of this application;

[0057] Figure 5 is a schematic diagram showing the relative positions of the refrigerant heat exchange channel and the battery cell assembly in Figure 4.

[0058] Figure 6 is a schematic diagram of the temperature distribution of the refrigerant heat exchange channel in some embodiments of this application.

[0059] Explanation of reference numerals in the attached drawings: 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor; 10, Battery cell assembly; 20, Housing; 1, Refrigerant heat exchange component; 11, Refrigerant heat exchange channel; 111, Inlet channel; 112, Outlet channel; 113, Extension channel; 114, Inlet position; 115, Outlet position; 116, Inlet port; 117, Unit channel; 1171, Upstream channel; 1172, Downstream channel; 1173, Return channel; 1174, Return section; 12, First heat exchange area; 121, First axis; 122, End area; 13, Second heat exchange area; 14, First plate; 15, Second plate; 2, Connector. Detailed Implementation

[0060] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0062] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0063] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0066] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0067] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0068] In recent years, new energy vehicles have experienced rapid development, and their market share is increasing. The urgent problem to be solved in the new energy vehicle industry is to quickly and efficiently achieve energy replenishment.

[0069] During the charging and discharging process, the battery devices in new energy vehicles release a lot of heat. The battery devices are usually equipped with heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0070] Fast charging is a mainstream solution for rapidly replenishing energy in new energy vehicles. However, its implementation faces numerous challenges. During fast charging, the electrode components generate a significant amount of heat, which can easily cause a rapid rise in the internal temperature of the battery pack. In fast charging, uneven heat exchange between the heat exchange components and individual battery cells is more likely to occur, leading to a sharp increase in the temperature of some individual battery cells and the accumulation of large amounts of heat inside the battery pack. This negatively impacts the battery's performance and lifespan, and may even pose significant safety hazards during use. Therefore, ensuring balanced heat dissipation, rapid heat exchange, and improving the consistency of temperature distribution within the battery pack have become bottlenecks in battery thermal management.

[0071] Specifically, battery devices generate heat during charging and discharging. If this heat cannot be effectively dissipated, it may lead to a decline in battery performance and a shortened lifespan. High temperatures can accelerate internal chemical reactions within the battery, increase internal resistance, reduce energy density, and in severe cases, may cause thermal runaway. Therefore, heat exchange components are incorporated into battery devices to cool the individual battery cells.

[0072] Regarding the issue of uneven temperature distribution and localized high temperatures within the battery device, research has revealed that large overheated areas exist on the heat exchange components inside the battery device. These overheated areas have low heat exchange capacity, and their presence reduces the heat exchange efficiency and capacity of individual battery cells. This causes a sharp rise in the temperature of the corresponding battery cells, resulting in uneven temperature distribution and affecting the normal operation of the battery device. Furthermore, the overheated areas also prevent heat from dissipating in a timely manner, leading to an increase in the internal temperature of the battery device. Ultimately, this affects the performance and lifespan of both the individual battery cells and the entire battery device.

[0073] Further analysis reveals that the heat exchange components have internal heat exchange channels with centralized inlets and outlets. The heat exchange fluid (or refrigerant) changes from liquid to gas after entering the inlet for heat exchange, while the refrigerant essentially vaporizes in the outlet. The gaseous refrigerant has a relatively small heat exchange capacity, resulting in overheated areas on the heat exchange components. These overheated areas reduce the heat exchange capacity of the battery cells. The centralized outlets also create large overheated areas, which are areas with weak heat exchange capacity. Excessively large overheated areas negatively impact the overall heat exchange effect on the battery cells, causing a sharp rise in temperature in the corresponding overheated areas. This leads to uneven temperature distribution on the battery cells, heat accumulation, and ultimately affects the performance and lifespan of the battery cells and the entire battery system.

[0074] Therefore, this application provides a battery device 100 that can solve the above problems to a certain extent. By making the heat exchange capacity of each part of the heat exchange component adaptable, the overall temperature of the battery cell assembly 10 is more stable and balanced, which is conducive to improving the performance and service life of the battery cell assembly 10 and the battery device 100.

[0075] Specifically, referring to FIG2, this application embodiment provides a battery device 100, which may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells, which are connected in series, parallel, or mixed connection through a busbar. The battery device 100 may also be a battery pack, which generally includes a housing 20 and one or more battery cell assemblies 10, with the battery cell assemblies 10 housed in the housing 20.

[0076] The battery device 100 disclosed in this application can be used in electrical devices that use the battery device 100 as a power source or in various energy storage devices and systems that use the battery device 100 as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles 1000, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0077] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0078] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0079] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Please refer to Figure 2, which is an exploded view of a battery device 100 provided in some embodiments of this application. In one embodiment, the battery device 100 includes a housing 20 and a battery cell assembly 10. A receiving space is formed within the housing 20, and the battery cell assembly 10 is housed within the receiving space. The battery cell assembly 10 is typically formed by arranging multiple battery cells. Alternatively, the battery cell assembly 10 can also be a battery module, which is formed by arranging and fixing multiple battery cells to create an independent module. The housing 20 provides receiving space for the battery cell assembly 10, and the housing 20 can adopt various structures.

[0081] A battery cell refers to the smallest unit that makes up the battery device 100. Each battery cell can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. Battery cells can be cylindrical, flat, cuboid, or other shapes.

[0082] According to some embodiments of this application, referring to Figures 2-6, this application provides a battery device 100, which includes a battery cell assembly 10 and a refrigerant heat exchange component 1.

[0083] The refrigerant heat exchange component 1 is provided with a refrigerant heat exchange channel 11. The refrigerant heat exchange component 1 includes a first heat exchange region 12, which is configured to exchange heat with the battery cell assembly 10. The refrigerant heat exchange channel 11 located in the first heat exchange region 12 is symmetrical about a first axis 121. The first axis 121 is the central axis of the refrigerant heat exchange component 1 in the width direction. The refrigerant heat exchange channel 11 located in the first heat exchange region 12 and on both sides of the first axis 121 flows into and out of the refrigerant heat exchange medium at a position symmetrical to the first axis 121.

[0084] Specifically, the battery cell assembly 10 includes one or more battery cells. The refrigerant heat exchange component 1 needs to exchange heat with the battery cell assembly 10. Therefore, the refrigerant heat exchange component 1 needs to be located close to the battery cell assembly 10, or the refrigerant heat exchange component 1 needs to directly contact or abut against the battery cell assembly 10, thereby improving the heat exchange effect. This embodiment provides heat exchange between the battery cell assembly 10 and the first heat exchange region 12, because the design of the refrigerant heat exchange channel 11 in the first heat exchange region 12 can make the temperature of the battery cell assembly 10 as uniform as possible when the first heat exchange region 12 exchanges heat with various parts of the battery cell assembly 10.

[0085] Specifically, the battery cell assembly 10 may include multiple battery cells. The surface of the battery cell that exchanges heat with the first heat exchange area 12 may be the bottom surface or the side surface of the battery cell. Taking the battery device 100 as a horizontally placed example, the surface below the battery cell is the bottom surface, and the surface of the battery cell along the vertical direction is the side surface. In this embodiment, the first heat exchange area 12 of the refrigerant heat exchange component 1 may exchange heat with the bottom surface or the side surface of the battery cell. That is to say, the refrigerant heat exchange component 1 may be located at the bottom of the battery cell assembly 10 or at the side of the battery cell assembly 10. The refrigerant heat exchange component 1 located at the bottom of the battery cell assembly 10 may also be called a heat exchange base plate or a cooling base plate.

[0086] For ease of explanation, the following embodiments will be described using an example of a battery device 100 of this application that is placed horizontally, with the refrigerant heat exchange component 1 located at the bottom of the battery cell assembly 10.

[0087] As shown in Figure 3, the refrigerant heat exchange component 1 may include a first plate 14 and a second plate 15. A groove structure with a preset extension length and extension shape is formed on the second plate 15. The groove structure can be prepared by stamping. The first plate 14 and the second plate 15 are fixedly or detachably connected, and the groove opening of the groove structure is closed to form a through hole structure or cavity structure, that is, to form a refrigerant heat exchange channel 11.

[0088] Alternatively, the refrigerant heat exchange component 1 can also be a single plate with refrigerant heat exchange channels 11 formed on it.

[0089] The first heat exchange region 12 may include a portion of the refrigerant heat exchange channels 11. The refrigerant heat exchange channels 11 located in the first heat exchange region 12 are symmetrical about a first axis 121. The first axis 121 refers to an axis within the first heat exchange region 12, specifically the central axis of the refrigerant heat exchange component 1 in the width direction. The refrigerant heat exchange channels 11 located on both sides of this axis are symmetrically arranged about this axis. In this way, when heat exchange occurs between the refrigerant heat exchange channel 11 and the battery cell assembly 10 through the first heat exchange region 12, the symmetrically arranged refrigerant heat exchange channels 11 can make the heat exchange capacity on both sides of the first axis 121 more balanced.

[0090] Furthermore, in this embodiment, the refrigerant heat exchange channels 11 located within the first heat exchange region 12 and on both sides of the first axis 121 flow into and out of the refrigerant heat exchange medium at symmetrical positions. Since the structure of the refrigerant heat exchange channels 11 is symmetrically arranged, when the refrigerant heat exchange medium flows into and out at symmetrical positions, the flow direction of the refrigerant heat exchange medium on both sides of the first axis 121 is essentially synchronous or the flow trajectory is symmetrical. This further makes the heat of the refrigerant heat exchange channels 11 on both sides of the first axis 121 relatively balanced, so that their heat exchange capacity is roughly the same. When the battery cell assembly 10 is placed, the first axis 121 can also be used as the center line. The structure of the battery cell assembly 10 on both sides of the first axis 121 is basically the same, so that the temperature on both sides of the battery cell assembly 10 can be as balanced as possible when the battery cell assembly 10 performs heat exchange.

[0091] The advantage of this embodiment is that not only is the flow channel structure within the first heat exchange region 12 symmetrical, but the flow direction and trajectory of the refrigerant heat exchange medium within the flow channel are also symmetrical. This ensures that the heat exchange capacity at symmetrical positions is balanced. When heat exchange occurs between the battery cell assembly 10 and the first heat exchange region 12, balanced heat exchange can be achieved, maximizing temperature uniformity on both sides of the battery cell assembly 10. Specifically, when the battery cell assembly 10 is correspondingly arranged with the first heat exchange region 12, the battery cell assemblies 10 on both sides of the first axis 121 are also symmetrical. That is, the battery cell assembly 10 can have an equal number of battery cells arranged in the same way on both sides of the first axis 121, and the battery cells on both sides have equal heat exchange effects.

[0092] In some embodiments, referring to FIG4, the refrigerant heat exchange component 1 is further provided with an inlet channel 111 and an outlet channel 112. The inlet channel 111 is used to allow the refrigerant heat exchange medium to flow into the refrigerant heat exchange channel 11 in the first heat exchange region 12. The outlet channel 112 is used to allow the refrigerant heat exchange medium in the refrigerant heat exchange channel 11 in the first heat exchange region 12 to flow out. The refrigerant heat exchange channel 11 in the first heat exchange region 12 is connected at an inlet position 114 on the inlet channel 111 directly or through an extension channel 113, and at an outlet position 115 on the outlet channel 112. The distance between at least one side of the refrigerant heat exchange component 1 and the inlet position 114 is greater than the distance between it and the outlet position 115.

[0093] This embodiment provides an inlet channel 111 and an outlet channel 112. The refrigerant heat exchange channel 11 in the first heat exchange region 12 can be directly connected to the inlet channel 111 and the outlet channel 112, or in some cases, it can be connected to the inlet channel 111 and the outlet channel 112 through an extension channel 113. The connection position on the inlet channel 111 is the inlet position 114, and the connection position on the outlet channel 112 is the outlet position 115. Then, the distance between at least one side of the refrigerant heat exchange component 1 and the inlet position 114 is greater than the distance between it and the outlet position 115. The inlet position 114 and the outlet position 115 that satisfy this distance relationship in this embodiment can be the inlet position 114 and the outlet position 115 of the same circulation channel. The inlet channel 111 and the outlet channel 112 can also be part of the refrigerant heat exchange channel 11 within the refrigerant heat exchange component 1.

[0094] The advantage of this embodiment is that the medium temperature at the outlet 115 is higher than that at the inlet 114. Therefore, the outlet 115 is positioned closer to the edge, while the inlet 114 is positioned closer to the center, which facilitates heat dissipation in the central heat-concentrated area of ​​the battery cell assembly 10. This is because the battery cells are concentrated in the center of the battery cell assembly 10, resulting in a higher temperature, while the temperature is lower on the sides or edges.

[0095] In some embodiments, referring to FIG4, the refrigerant heat exchange component 1 further includes a second heat exchange region 13, wherein the refrigerant heat exchange channel 11 in the second heat exchange region 13 is connected to the refrigerant heat exchange channel 11 in the first heat exchange region 12 so that the refrigerant heat exchange medium flows into and out of the refrigerant heat exchange channel 11 in the first heat exchange region 12.

[0096] Specifically, the refrigerant heat exchange component 1 includes a second heat exchange region 13. The refrigerant heat exchange channels 11 in the second heat exchange region 13 can be symmetrically arranged about the first axis 121 or not symmetrically arranged about the first axis 121. Their function is to provide refrigerant heat exchange medium to the refrigerant heat exchange channels 11 in the first heat exchange region 12, allowing the refrigerant heat exchange medium to flow in and out. The second heat exchange region 13 may or may not participate in the heat exchange process with the battery cell assembly 10. Channels can be provided in the second heat exchange region 13 to supply refrigerant heat exchange medium to the refrigerant heat exchange channels 11 on both sides of the first heat exchange region 12, and to receive the refrigerant heat exchange medium flowing out from the refrigerant heat exchange channels 11 on both sides. Specifically, these can be inlet channels 111 and outlet channels 112, forming a circulating flow of the refrigerant heat exchange medium.

[0097] The advantage of this embodiment is that the second heat exchange zone 13 provides the refrigerant heat exchange medium inflow and outflow structure for the refrigerant heat exchange medium in the refrigerant heat exchange channel 11 of the first heat exchange zone 12, so that the refrigerant heat exchange medium can circulate. In this embodiment, the refrigerant heat exchange medium inflow and outflow channels are set separately in the second heat exchange zone 13, which avoids interference with the channel arrangement of the first heat exchange zone 12. By setting the inflow and outflow channels in a separate area, the refrigerant heat exchange channel 11 of the first heat exchange zone 12 can be symmetrically arranged as needed.

[0098] In some embodiments, please refer to Figures 4 and 5, a heat exchange surface is formed on the refrigerant heat exchange component 1 at least corresponding to the first heat exchange region 12, and the heat exchange surface is used to contact the battery cell assembly 10 or be disposed adjacent to the battery cell assembly 10.

[0099] Specifically, the refrigerant heat exchange component 1 exchanges heat with the battery cell assembly 10 through a heat exchange surface. Since the first heat exchange region 12 is used for heat exchange with the battery cell assembly 10, a heat exchange surface is formed at least corresponding to the first heat exchange region 12. In some cases, the second heat exchange region 13 can also form a corresponding heat exchange surface. The heat exchange surface of the first heat exchange region 12 and the heat exchange surface of the second heat exchange region 13 can be on the same plane. When setting the position of the battery cell assembly 10, the battery cell assembly 10 can be correspondingly set at the heat exchange surface formed in the first heat exchange region 12.

[0100] The refrigerant heat exchange channel 11 has a channel-like structure. As described above, the refrigerant heat exchange component 1 may include a first plate 14 and a second plate 15. A groove can be provided on the surface of the second plate 15 along a preset direction of the refrigerant heat exchange channel 11. After the groove is closed, the second plate 15 and the first plate 14 are attached to form the refrigerant heat exchange channel 11. At this time, the side surface of the first plate 14 facing away from the groove forms a heat exchange surface. The battery cell assembly 10 is disposed on the heat exchange surface portion corresponding to the first heat exchange area 12.

[0101] Alternatively, when the refrigerant heat exchange component 1 is an integral plate, the integral plate has a certain thickness, and a refrigerant heat exchange channel 11 is opened on the integral plate, then the plate surface of the integral plate is the heat exchange surface.

[0102] This embodiment provides a heat exchange method through a heat exchange surface. The heat exchange surface is a flat surface that can make good contact with the battery cell assembly 10 and achieve a good heat exchange effect.

[0103] In some embodiments, please refer to FIG4, the refrigerant heat exchange channel 11 in the first heat exchange region 12 and located on the same side of the first axis 121 includes a plurality of unit channels 117 with the same or different structures. The structures of two unit channels 117 located on both sides of the first axis 121 and in corresponding positions are symmetrical about the first axis 121.

[0104] Specifically, this embodiment provides the form of multiple unit flow channels 117. The refrigerant heat exchange flow channel 11 located on the same side of the first axis 121 within the first heat exchange region 12 includes multiple unit flow channels 117, rather than a single integral flow channel. If an integral flow channel is used, the local heat exchange capacity is not easy to control, and targeted heat exchange cannot be performed on specific areas of the battery cell assembly 10.

[0105] This embodiment employs multiple unit flow channels 117, which may have the same or different structures. In general, the temperature in the middle area of ​​the battery cell assembly 10 is higher than that in the edge area because the battery cells are more concentrated. Therefore, a corresponding unit flow channel 117 can be set for the corresponding area, while a unit flow channel 117 with a different structure can be set in the edge area, thus achieving adaptive heat exchange.

[0106] Furthermore, this embodiment also provides a structure with two unit flow channels 117 located on both sides of the first axis 121 and at corresponding positions, which are symmetrical about the first axis 121. This ensures that the heat exchange capacity of the refrigerant heat exchange flow channels 11 on both sides of the first axis 121 is consistent, and the heat exchange capacity of the unit flow channels 117 at corresponding positions is the same. The corresponding positions can be symmetrical positions or positions with equal vertical distances to the first axis 121. When the battery cell assembly 10 exchanges heat, equivalent heat exchange can be achieved between the battery cells on both sides of the battery cell assembly 10.

[0107] In some embodiments, please refer to FIG4, the refrigerant heat exchange channel 11 in the second heat exchange region 13 includes an inlet channel 111 and an outlet channel 112. The unit channels 117 located on the same side of the first axis 121 in the first heat exchange region 12 share the same inlet channel 111 to enter the refrigerant heat exchange medium, and share the same outlet channel 112 to exit the refrigerant heat exchange medium.

[0108] Specifically, the second heat exchange zone 13 includes an inlet channel 111 and an outlet channel 112. The inlet channel 111 is used to allow the refrigerant heat exchange medium to flow in, thereby allowing the refrigerant heat exchange medium to enter the refrigerant heat exchange channel 11 in the first heat exchange zone 12. The outlet channel 112 is used to allow the refrigerant heat exchange medium to flow out, thereby receiving the refrigerant heat exchange medium flowing out from the first heat exchange zone 12.

[0109] This embodiment provides that the unit flow channels 117 located on the same side of the first axis 121 share the same inlet flow channel 111. This is because, under normal circumstances, the various indicators of the refrigerant heat exchange medium in the same inlet flow channel 111 are the same, that is, the heat exchange effect is the same, such as flow rate and temperature. When the unit flow channels 117 on the same side share a common inlet flow channel 111, the refrigerant heat exchange medium entering each unit flow channel 117 can be controlled more accurately. For example, the order in which the refrigerant heat exchange medium in the same inlet flow channel 111 flows to each unit flow channel 117 on the same side can be controlled. This can control the heat exchange capacity of each unit flow channel 117 on the same side to a certain extent.

[0110] Furthermore, the refrigerant heat exchange medium can also flow out through the same outflow channel 112 of each unit flow channel 117 on the same side, which simplifies the structure.

[0111] This embodiment may also provide a connector 2, which is connected to the inlet channel 111 and the outlet channel 112 respectively.

[0112] In some embodiments, please refer to FIG4, the unit flow channels 117 located on different sides of the first axis 121 enter the refrigerant heat exchange medium through different inlet flow channels 111 and exit the refrigerant heat exchange medium through different outlet flow channels 112.

[0113] This embodiment provides that the refrigerant heat exchange medium flows into the unit flow channels 117 on different sides through different inlet flow channels 111. The effect of this is to increase the heat exchange capacity. Compared with both sides using the same inlet flow channel 111, the heat exchange capacity is stronger, which means that the inflow of refrigerant heat exchange medium is increased. The unit flow channels 117 on both sides enter the refrigerant heat exchange medium through different inlet flow channels 111. However, these different inlet flow channels 111 should be set as much as possible so that the various properties of the internal refrigerant heat exchange medium are the same. For example, they can be two inlet flow channels 111 formed by splitting the same main flow channel.

[0114] In some cases, such as when the heat exchange capacity requirement is not high, the unit flow channels 117 on both sides can enter the refrigerant heat exchange medium through the same inlet flow channel 111, which is beneficial to set the heat exchange capacity of the unit flow channels 117 on both sides to be the same or approximately the same.

[0115] In some embodiments, referring to FIG4, multiple unit channels 117 located on the same side of the first axis 121 in the flow direction of the inlet channel 111 are connected to the inlet channel 111 in sequence from upstream to downstream. The order in which any unit channel 117 is connected to the inlet channel 111 among the multiple unit channels 117 on its side is marked as N. The order marked N of two unit channels 117 located on both sides of the first axis 121 and symmetrically arranged is the same.

[0116] Specifically, in this embodiment, based on the symmetrical structure of the unit flow channels 117 on both sides of the first axis 121 and the symmetrical positions of the inflow and outflow of the refrigerant heat exchange medium, the heat exchange capacity of the refrigerant heat exchange medium is also set to be symmetrical or approximately the same. This further enables the unit flow channels 117 on both sides of the first axis 121 to be designed with basically the same heat exchange capacity.

[0117] If the refrigerant heat exchange medium in the symmetrical unit flow channels 117 on both sides is to be approximately the same, then the order in which the unit flow channels 117 on each side connect to the inlet flow channel 111 must be the same. Specifically, the order refers to the sequential connection order of each unit flow channel 117 on the same side from upstream to downstream of the inlet flow channel 111. The smaller the order marker N, the closer it is to the upstream. For example, if multiple unit flow channels 117 on one side are connected sequentially from upstream to downstream, the closer to the upstream of the inlet flow channel 111, the stronger the heat exchange capacity of the refrigerant heat exchange medium, or in other words, the flow rate of the refrigerant heat exchange medium in the unit flow channel 117 connected first may be larger. The connection order of any unit flow channel 117 from upstream to downstream among multiple unit flow channels 117 on the same side is marked as N. For example, if the order mark N of a certain unit flow channel 117 is 1, it means that the connection position of the unit flow channel 117 is the upstream position among all unit flow channels 117 on that side. If N is 2, it means that there is another unit flow channel 117 connected upstream of the unit flow channel 117. The unit flow channel 117 can be directly connected to the inlet flow channel 111, or the unit flow channel 117 can also be connected to the inlet flow channel 111 through the extension flow channel 113. In order to eliminate the impact of the extension flow channel 113 on the heat exchange capacity, the length of the extension flow channel 113 used by each unit flow channel 117 can be set to be the same.

[0118] In this embodiment, the flow direction of the inlet channel 111 refers to the direction in which the internal refrigerant heat exchange medium flows, which is the flow direction from upstream to downstream. Multiple unit channels 117 on the same side are connected sequentially according to the connection position from upstream to downstream. The sequence mark N corresponding to two unit channels 117 located on both sides of the first axis 121 and symmetrically arranged is the same. This means that, for example, if a certain unit channel 117 on a certain side is the second one from upstream to downstream among the multiple unit channels 117 on this side to connect with the inlet channel 111, then the connection position of the unit channel 117 on the opposite side that is symmetrical to the unit channel 117 to the inlet channel 111 is also the second one from upstream to downstream among the multiple unit channels 117 on this side.

[0119] Therefore, in this embodiment, the unit flow channels 117 in symmetrical positions are connected in the same order, which corresponds to obtaining refrigerant heat exchange medium with approximately the same indicators, such as quantity, flow rate, temperature, etc. This further enhances the balance of heat exchange capacity of the refrigerant heat exchange flow channels 11 on both sides of the first axis 121, which is conducive to the balanced heat exchange of the battery cell assembly 10 on both sides of the first axis 121 during heat exchange.

[0120] In some embodiments, please refer to FIG4, the inlet channel 111 has an inlet 116, and the two unit channels 117 located on both sides of the first axis 121 and symmetrically arranged are connected at the same distance from the inlet 116 in the length extension direction of the inlet channel 111.

[0121] Specifically, to further ensure that the heat exchange capacity of the two symmetrically positioned unit channels 117 on both sides of the first axis 121 is approximately the same, this embodiment provides that the distance from the connection position of the two symmetrical unit channels 117 at the inlet channel 111 to the inlet port 116 is equal in the length extension direction of the inlet channel 111. The connection position can be the aforementioned inlet position 114. The inlet port 116 can be provided on the connector 2, and the connector 2 can also be provided with an outlet.

[0122] Because the distance is equal, the two unit flow channels 117 can better obtain the same refrigerant heat exchange medium with the same specifications, so that the refrigerant heat exchange medium flowing into the two unit flow channels 117 at symmetrical positions is the same, thereby enabling the symmetrical unit flow channels 117 to obtain the same heat exchange capacity.

[0123] In some cases, referring to Figure 4, the unit flow channel 117 can be connected to the inlet flow channel 111 via an extension flow channel 113. The connection point can be the connection between the extension flow channel 113 and the inlet flow channel 111, which can be the aforementioned inlet position 114. It should be noted that in this case, the extension flow channels 113 of the multiple unit flow channels 117 also need to be of the same length to avoid affecting the heat exchange capacity of the refrigerant heat exchange medium within the multiple unit flow channels 117. The extension flow channel 113 can be located in the second heat exchange region 13.

[0124] In some embodiments, referring to FIG4, the distance S between the connection position of the unit flow channel 117 on the inlet flow channel 111 and the inlet 116 in the length extension direction of the inlet flow channel 111 is denoted as the unit flow channel 117. The S values ​​corresponding to the multiple unit flow channels 117 located on the same side of the first axis 121 are arranged sequentially along a direction perpendicular to the first axis 121 and arranged sequentially from near to far from the first axis 121 are sequentially increased.

[0125] Specifically, if the distance from the connecting position to the inlet 116 is the same, then the properties of the refrigerant heat exchange medium flowing into the unit flow channel 117 are approximately the same. The first axis 121 is the middle position of the first heat exchange region 12, which also corresponds to the central region of the battery cell assembly 10. The battery cells in this position are arranged densely, so the temperature of the battery cell assembly 10 is higher in this region, while the temperature of the battery cell assembly 10 gradually decreases towards both sides. Based on this situation, the unit flow channel 117 close to the first axis 121 needs to have a stronger heat exchange capacity. The connecting position can be the aforementioned inlet 114.

[0126] Therefore, this embodiment provides that the S values ​​corresponding to the multiple unit flow channels 117 arranged from near to far from the first axis 121 increase sequentially. The larger the S value, the greater the distance the internal refrigerant heat exchange medium flows through, and the lower the heat exchange capacity. This makes the heat exchange capacity of the unit flow channel 117 closest to the first axis 121 the strongest, and the heat exchange capacity of the unit flow channels 117 arranged sequentially to both sides decrease sequentially.

[0127] The effect of this embodiment is that the heat exchange capacity of the unit flow channel 117 at different locations is matched with the heat of different areas of the battery cell assembly 10, which helps to keep the temperature of the battery cell assembly 10 uniform.

[0128] Similarly, in some cases, referring to Figure 4, the unit flow channel 117 can be connected to the inlet flow channel 111 via an extension flow channel 113. The connection point can be the connection position between the extension flow channel 113 and the inlet flow channel 111, which can be the aforementioned inlet position 114. It should be noted that in this case, the extension flow channels 113 of multiple unit flow channels 117 also need to be set to the same length to eliminate the influence of extension flow channels 113 of different lengths. The extension flow channel 113 can be located in the second heat exchange zone 13.

[0129] In some embodiments, referring to FIG4, the unit flow channel 117 includes an upstream flow channel 1171 and a downstream flow channel 1172 that are connected. The upstream flow channel 1171 and the downstream flow channel 1172 are parallel to the first axis 121. The upstream flow channel 1171 and the downstream flow channel 1172 of two adjacent unit flow channels 117 located on the same side of the first axis 121 are configured adjacently.

[0130] Specifically, the upstream flow channel 1171 refers to the upstream portion of the unit flow channel 117 in the flow direction of the refrigerant heat exchange medium, and the downstream flow channel 1172 refers to the downstream portion of the unit flow channel 117 in the flow direction of the refrigerant heat exchange medium. Both are parallel to the first axis 121.

[0131] Meanwhile, for a certain unit flow channel 117, the upstream flow channel 1171 has a stronger heat exchange capacity than the downstream flow channel 1172, that is, its temperature is relatively lower. Therefore, the upstream flow channel 1171 and the downstream flow channel 1172 of two adjacent unit flow channels 117 are arranged adjacently, so that the heat can be made more uniform to a certain extent and will not form overheated or overcooled areas.

[0132] In some embodiments, please refer to FIG4, the upstream channels 1171 of two unit channels 117 located on both sides of the first axis 121 and adjacent to the first axis 121 are arranged adjacently.

[0133] In this embodiment, the two unit flow channels 117 close to the first axis 121, that is, the upstream flow channels 1171 of the two unit flow channels 117 located on both sides of the first axis 121 and adjacent to the first axis 121, are arranged adjacently. In other words, the upstream flow channels 1171 of these two unit flow channels 117 are both close to the first axis 121. This enhances the heat exchange capacity near the first axis 121, which in turn enhances the heat exchange capacity in the middle region of the battery cell assembly 10. Since the battery cell assembly 10 is arranged corresponding to the first heat exchange region 12, the region near the first axis 121 corresponds to the middle region of the battery cell assembly 10. The heat in the middle region of the battery cell assembly 10 is more concentrated and the temperature is higher.

[0134] Therefore, the effect of this embodiment is that it can effectively exchange heat in the middle region of the battery cell assembly 10 and prevent the temperature in the middle region of the battery cell assembly 10 from becoming too high.

[0135] In some embodiments, referring to FIG4, the downstream flow channel 1172 of a single unit flow channel 117 is located on the side of the unit flow channel 117 away from the first axis 121.

[0136] Specifically, the downstream flow channel 1172 of a single unit flow channel 117 has a higher temperature than the upstream flow channel 1171 of the same unit flow channel 117, i.e., a lower heat exchange capacity. Therefore, it is set away from the first axis 121, i.e. away from the middle region of the battery cell assembly 10. This avoids the situation where the heat exchange capacity of the unit flow channel 117 near the middle region of the battery cell assembly 10 is low, which is conducive to the temperature balance of the battery cell assembly 10.

[0137] In some embodiments, referring to FIG4, the unit flow channel 117 further includes a return flow channel 1173 connected to the downstream flow channel 1172 of the unit flow channel 117. The return flow channel 1173 is used to connect to the refrigerant heat exchange channel 11 in the second heat exchange region 13 to allow the refrigerant heat exchange medium to flow out.

[0138] The refrigerant heat exchange channel 11 in the second heat exchange zone 13 can supply refrigerant heat exchange medium to the unit channel 117, and can also receive the refrigerant heat exchange medium flowing out of the unit channel 117.

[0139] This embodiment provides a unit flow channel 117 that also includes a return flow channel 1173. The return flow channel 1173 is connected to the downstream flow channel 1172 and is connected to the refrigerant heat exchange flow channel 11 of the second heat exchange zone 13. Since the refrigerant heat exchange medium flowing out of the unit flow channel 117 must return, and since the temperature of the refrigerant increases significantly during the return stage, it does not play a significant role in heat exchange. Therefore, a separate return flow channel 1173 is provided for the return flow. Since the heat exchange capacity decreases, the position of the return flow channel 1173 can be set separately to avoid the main heat exchange location. This can reduce the impact of the refrigerant during the return stage on the heat exchange effect.

[0140] The return flow channel 1173 can be directly connected to the refrigerant heat exchange channel 11 in the second heat exchange zone 13, or it can be connected through the extension channel 113, which can be located in the second heat exchange zone 13.

[0141] In some embodiments, referring to FIG4, the return channel 1173 includes a return section 1174 parallel to the first axis 121. The multiple return sections 1174 of the multiple unit channels 117 located on the same side of the first axis 121 are arranged adjacently and located in the end region 122 of the first heat exchange region 12 away from the first axis 121. The region of the first heat exchange region 12 other than the end region 122 is used for heat exchange with the battery cell assembly 10.

[0142] Specifically, the portion of the return flow channel 1173 located within the first heat exchange region 12 is mainly the return section 1174. The heat exchange capacity of the return sections 1174 of all unit flow channels 117 is relatively low. Therefore, in this embodiment, the multiple return sections 1174 of multiple unit flow channels 117 are arranged in a form parallel to the first axis 121 and are arranged adjacent to each other, located side by side in the end region 122 of the first heat exchange region 12 away from the first axis 121. The end region 122 does not participate in heat exchange, so the return section 1174 with low heat exchange capacity will not have a significant impact on the heat exchange effect, thus avoiding the problem of uneven temperature at various parts of the battery cell assembly 10.

[0143] The advantage of this embodiment is that the main part of the return flow channel 1173, the return section 1174, is located outside the area that participates in heat exchange and does not participate in heat exchange, thereby reducing the impact on the temperature uniformity of the battery cell assembly 10.

[0144] In some embodiments, referring to FIG4, in a direction perpendicular to the first axis 121:

[0145] The distance between adjacent recirculation sections 1174 located on the same side of the first axis 121 is L1;

[0146] The upstream flow channel 1171 of the same unit flow channel 117 includes multiple upstream branch channels parallel to the first axis 121, and the distance between adjacent upstream branch channels is L2;

[0147] The downstream flow channel 1172 of the same unit flow channel 117 includes multiple downstream branch channels parallel to the first axis 121, and the distance between adjacent downstream branch channels is L3;

[0148] Therefore, L1 is less than L2 and L1 is less than L3.

[0149] Specifically, the heat exchange capacity of the return section 1174 is relatively low, meaning that the temperature of the refrigerant heat exchange medium in the return section 1174 is relatively high. Even though the return section 1174 is located in the end region 122, it may still have a certain impact on the temperature uniformity of the battery cell assembly 10. For example, it may cause the local temperature at the end of the battery cell assembly 10 to be relatively high. Therefore, in this embodiment, the distance L1 between the return sections 1174 is set to be relatively small, specifically less than L2 and L3. Due to the denser arrangement, the impact is reduced to a certain extent, and its heat exchange capacity is appropriately increased.

[0150] The advantage of this embodiment is that, due to the denser arrangement of the recirculation sections 1174, the impact on the temperature uniformity of the battery cell assembly 10 is reduced.

[0151] In some embodiments, referring to FIG5, the battery cell assembly 10 includes a plurality of battery cells arranged along a first axis 121 and in a direction perpendicular to the first axis 121.

[0152] Specifically, the battery cell assembly 10 includes multiple battery cells, increasing energy storage, and their arrangement is along the direction of the first axis 121 or perpendicular to the first axis 121. This arrangement ensures that the battery cells within the battery cell assembly 10 conform to the structural layout of the refrigerant heat exchange channel 11 provided in this embodiment, maximizing its effectiveness and guaranteeing temperature uniformity throughout the battery cell assembly 10.

[0153] In some embodiments, referring to FIG2, the battery device 100 further includes a housing 20 having an accommodating space, a refrigerant heat exchange component 1 located within the accommodating space or used as a side panel to form the housing 20, and the refrigerant heat exchange component 1 for contacting the battery cell assembly 10.

[0154] This embodiment provides a configuration of the refrigerant heat exchange component 1 within the battery device 100. It can be placed within the accommodating space, i.e., at the bottom of the accommodating space, to support the battery cell assembly 10. Alternatively, it can serve as a side panel forming the housing 20. In either form, it can contact the battery cell assembly 10 to form a heat exchange.

[0155] The advantage of this embodiment is that the assembly structure of the refrigerant heat exchange component 1 within the battery device 100 is simple and reasonable, and easy to use.

[0156] This application also provides a specific embodiment of a heat exchange component, including the refrigerant heat exchange component 1 provided in any of the embodiments.

[0157] The heat exchange component in this embodiment includes the refrigerant heat exchange component 1, which enables the heat exchange component to maintain the balanced heat dissipation of the battery device 100 when exchanging heat with the battery device 100, thus ensuring the normal operating temperature of the battery device 100.

[0158] This application also provides an electrical device, including the battery device 100 provided in any embodiment, the battery device 100 being used to store or provide electrical energy.

[0159] Since the power device includes the battery device 100 provided in this application embodiment, the reliability of the power device can be increased.

[0160] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device, characterized by, The application relates to a battery cell assembly and a refrigerant heat exchange component. The refrigerant heat exchange component comprises a refrigerant heat exchange flow channel, and the refrigerant heat exchange component comprises a first heat exchange region configured to exchange heat with the battery cell assembly. The refrigerant heat exchange flow channel in the first heat exchange region is symmetrical about a first axis, which is the central axis of the refrigerant heat exchange component in the width direction. The refrigerant heat exchange flow channel in the first heat exchange region on both sides of the first axis flows into and out of the refrigerant heat exchange medium at positions symmetrical about the first axis.

2. The battery device of claim 1, wherein The refrigerant heat exchange component further comprises an inflow flow channel and an outflow flow channel.

3. The battery device according to claim 1 or 2, wherein The inflow flow channel is used to flow the refrigerant heat exchange medium into the refrigerant heat exchange flow channel in the first heat exchange region.

4. The battery device according to any one of claims 1 to 3, wherein The outflow flow channel is used to flow the refrigerant heat exchange medium out of the refrigerant heat exchange flow channel in the first heat exchange region.

5. The battery device of claim 3, wherein The refrigerant heat exchange flow channel in the first heat exchange region directly or through an extension flow channel is connected to the inflow flow channel at an inflow position and connected to the outflow flow channel at an outflow position.

6. The battery device of claim 5, wherein At least one side of the refrigerant heat exchange component is farther from the inflow position than from the outflow position.

7. The battery device of claim 6, wherein The refrigerant heat exchange component further comprises a second heat exchange region.

8. The battery device according to claim 6 or 7, wherein The refrigerant heat exchange flow channel in the second heat exchange region is connected to the refrigerant heat exchange flow channel in the first heat exchange region to flow the refrigerant heat exchange medium into and out of the refrigerant heat exchange flow channel in the first heat exchange region.

9. The battery device of any one of claims 6-8, wherein, A heat exchange surface corresponding to the first heat exchange region is formed on the refrigerant heat exchange component. The heat exchange surface is used to contact or be adjacent to the battery cell assembly. The refrigerant heat exchange flow channel in the first heat exchange region on the same side of the first axis comprises a plurality of unit flow channels with the same or different structures. The structures of two unit flow channels located on both sides of the first axis and at corresponding positions are symmetrical about the first axis. The refrigerant heat exchange flow channel in the second heat exchange region comprises an inflow flow channel and an outflow flow channel. The unit flow channels on the same side of the first axis in the first heat exchange region share the same inflow flow channel to enter the refrigerant heat exchange medium and share the same outflow flow channel to flow out the refrigerant heat exchange medium. The unit flow channels on different sides of the first axis enter the refrigerant heat exchange medium through different inflow flow channels and flow out the refrigerant heat exchange medium through different outflow flow channels. In the inflow flow direction, the unit flow channels on the same side of the first axis are sequentially connected to the inflow flow channel from upstream to downstream. The order of the unit flow channels connected to the inflow flow channel on the same side of the first axis is marked as N. The connection positions of the unit flow channels on the inflow flow channel on both sides of the first axis are equal in distance to the inflow port in the length extension direction of the inflow flow channel.

10. The battery device of claim 9, wherein, The distance from the inlet port to the communication position of the unit flow channel on the inlet flow channel in the length extension direction of the inlet flow channel is S, and the S value corresponding to the unit flow channels arranged in sequence along the direction perpendicular to the first axis and arranged in sequence from the first axis in sequence from near to far on the same side of the first axis increases in sequence.

11. The battery device of any one of claims 5-10, wherein, The unit flow channel comprises a communication-connected upstream flow channel and a downstream flow channel, and the upstream flow channel and the downstream flow channel are parallel to the first axis. The upstream flow channels and the downstream flow channels of two unit flow channels located on the same side of the first axis and adjacent to each other are arranged adjacent to each other.

12. The battery device of claim 11, wherein, The upstream flow channels of two unit flow channels located on both sides of the first axis and adjacent to the first axis are arranged adjacent to each other.

13. The battery device of claim 11, wherein, The downstream flow channel of a single unit flow channel is located on the side of the unit flow channel away from the first axis.

14. The battery device of any one of claims 11-13, wherein, The unit flow channel further comprises a return flow channel in communication with the downstream flow channel of the unit flow channel, and the return flow channel is used to communicate the refrigerant heat exchange channel in the second heat exchange region to flow out the refrigerant heat exchange medium.

15. The battery device of claim 14, wherein, The return flow channel comprises a return flow section parallel to the first axis, and the return flow sections of the unit flow channels located on the same side of the first axis are arranged adjacent to each other and located in the end region of the first heat exchange region away from the first axis. The region of the first heat exchange region except the end region is used for heat exchange with the battery cell assembly.

16. The battery device according to claim 15, wherein, In the direction perpendicular to the first axis: The distance between the adjacent return flow sections on the same side of the first axis is L1; The upstream flow channel of the same unit flow channel comprises a plurality of upstream sub-flow channels parallel to the first axis, and the distance between adjacent upstream sub-flow channels is L2; The downstream flow channel of the same unit flow channel comprises a plurality of downstream sub-flow channels parallel to the first axis, and the distance between adjacent downstream sub-flow channels is L3; Then, L1 is less than L2 and L1 is less than L3.

17. The battery device of any one of claims 1-16, wherein, The battery cell assembly comprises a plurality of battery cells arranged in the direction of the first axis and in the direction perpendicular to the first axis.

18. The battery device of any one of claims 1-17, wherein, The battery device further comprises a box body having a containing space, and the refrigerant heat exchange component is located in the containing space or is used as a side panel to form the box body, and the refrigerant heat exchange component is used to contact the battery cell assembly.

19. A heat exchange component, characterized by The refrigerant heat exchange component according to any one of claims 1-18.

20. An electrical device, comprising: The battery device according to any one of claims 1-18 is used to store or provide electric energy.

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