WO2025228311A1 - Battery device, refrigerant heat-exchange device and electric device - Google Patents

Abstract

The present application belongs to the technical field of battery production. Provided are a battery device, a refrigerant heat-exchange device and an electric device. The battery device comprises a case assembly, a battery cell assembly and a refrigerant heat-exchange component, wherein the case assembly has an accommodating cavity; the battery cell assembly is arranged in the accommodating cavity; the battery cell assembly comprises a plurality of columns of battery cell groups, each column of battery cell group comprising a plurality of battery cells stacked in a first direction, and the plurality of columns of battery cell groups being arranged side by side in a second direction; the refrigerant heat-exchange component has a heat-exchange face; the refrigerant heat-exchange component comprises a plurality of main heat-exchange flow channels, which are arranged in parallel in the second direction; each main heat-exchange flow channel comprises a main flow-splitting node portion, a main flow-converging node portion and a main area flow channel portion; each main area flow channel portion comprises heat-exchange flow sub-channels connected in parallel; the projection area of each column of battery cell group on the heat-exchange face covers at least one main heat-exchange flow channel; and the second direction is perpendicular to the first direction. The present application aims to improve the temperature uniformity capability of a refrigerant heat-exchange component.

Description

Battery devices, refrigerant heat exchangers and electrical appliances

This application claims priority to Chinese Patent Application No. 202420907842.4, filed with the State Intellectual Property Office of China on April 28, 2024, entitled "Heat Exchange Device, Battery and Electrical Device", the entire contents of which are incorporated herein by reference; and claims priority to International Application PCT/CN2025/078593, filed on February 21, 2025, entitled "Refrigerant Heat Exchange Component, Battery Device and Electrical Device", the entire contents of which are incorporated herein by reference.

Technical Field

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.

In related technologies, there is a significant mismatch between the flow channel distribution inside the heat exchange component and the arrangement of the battery cell assembly, resulting in an uneven heat exchange between the heat exchange component and the battery cell assembly, which in turn affects the performance and service life of the battery device.

Summary of the Invention

The purpose of this application is to provide a battery device, a refrigerant heat exchange device, and an electrical device, aiming to solve the technical problem of uneven heat exchange between the refrigerant heat exchange component and the individual battery cells in the battery device.

Technical solutions

The technical solution adopted in the embodiments of this application is:

In a first aspect, this application provides a battery device, comprising:

The housing assembly has a receiving cavity;

A battery cell assembly is disposed within a receiving cavity; the battery cell assembly includes multiple rows of battery cell groups, each row of battery cell groups including multiple battery cells stacked in a first direction, and the multiple rows of battery cell groups are arranged side by side in a second direction;

A refrigerant heat exchange component has a heat exchange surface configured to exchange heat with a battery cell assembly. The refrigerant heat exchange component includes multiple main heat exchange channels arranged in parallel in a second direction. Each main heat exchange channel includes a main branch node, a main confluence node, and a main zone channel, with the main zone channel connecting the main branch node and the main confluence node. Each main zone channel includes multiple parallel heat exchange sub-channels. The projected area of each row of battery cells on the heat exchange surface covers at least one main heat exchange channel. The second direction is perpendicular to the first direction.

In this embodiment, the battery cell assembly is arranged into multiple rows of battery cell groups. Corresponding to each row of battery cell groups, the refrigerant heat exchange component forms multiple main heat exchange channels. The multiple main heat exchange channels are connected in parallel in the arrangement direction of the battery cell groups, and the extension direction of each main heat exchange channel is consistent with the arrangement direction of the multiple battery cells in each row of battery cell groups. This allows the multiple battery cells in each row of battery cell groups to have a larger heat exchange area with the main heat exchange channels, and each main heat exchange channel can more effectively exchange heat with each battery cell group, which is beneficial to improving the effect of balanced heat exchange.

In one embodiment, each heat exchanger sub-channel extends along a first direction and is spaced apart in a second direction.

In this embodiment, by arranging the main flow channel section into a structure in which multiple heat exchange sub-channels are arranged in parallel and spaced apart, it is beneficial to increase the number of flow channels and adjust the width of the heat exchange sub-channels to a suitable range, thereby increasing the corresponding heat exchange area between the main flow channel section and the battery cell assembly, thus improving the heat exchange capacity and the refrigerant flow rate, thereby improving the heat exchange efficiency.

In one embodiment, in the first direction, the main branch node and the main confluence node are both located at the same end of the main flow channel.

In this embodiment, the main branch node and the main confluence node are located at the same end of the main flow channel section, so that other pipes connected to the main branch node and the main confluence node can be concentrated on one side of the main heat exchange flow channel, which is beneficial to improving the concentration of the arrangement of other flow channel sections.

In one embodiment, the refrigerant heat exchange component includes a main distribution and collection area and a heat exchange area. The main heat exchange channels are distributed in the heat exchange area. The main distribution and collection area includes multiple trunk channels. Some trunk channels are connected to the main distribution nodes, and other trunk channels are connected to the main confluence nodes. The number of trunk channels is less than or equal to the sum of the number of distribution nodes and confluence nodes.

In this embodiment, the main branch node and the main confluence node are located at the same end of the main flow channel section, so that other pipes connected to the main branch node and the main confluence node can be concentrated on one side of the main heat exchange flow channel, which is beneficial to improving the concentration of the arrangement of other flow channel sections.

In one embodiment, the multiple trunk channels are divided into multiple first trunk channels and multiple second trunk channels. Each main channel section includes an upstream channel and a downstream channel. The first trunk channels, main branch nodes, upstream channels, downstream channels, main confluence nodes and second trunk channels are sequentially connected. The number of first trunk channels is less than or equal to the sum of the number of branch nodes.

In this embodiment, by controlling the number of first trunk channels, the layout and structure of the first trunk channels in the main diversion and collection area can be rationally planned, which is conducive to avoiding the second trunk channels, improving space utilization, and achieving the goal of uniform diversion.

In one embodiment, the multiple trunk channels are divided into multiple first trunk channels and multiple second trunk channels. Each main channel section includes an upstream channel and a downstream channel. The first trunk channels, main branch nodes, upstream channels, downstream channels, main confluence nodes, and second trunk channels are sequentially connected. The number of second trunk channels is less than or equal to the sum of the number of confluence nodes.

In this embodiment, by controlling the number of second trunk channels, the layout and structure of the second trunk channels in the main diversion and collection area can be rationally planned, which is conducive to avoiding the first trunk channels, improving space utilization, and achieving the goal of uniform diversion.

In one embodiment, each main flow channel includes an upstream flow channel and a downstream flow channel. The upstream flow channel includes multiple upstream sub-flow channels that are all connected to the downstream flow channel. The multiple upstream sub-flow channels extend along a first direction and are arranged opposite to each other and spaced apart in a second direction. Each upstream sub-flow channel is connected to the main branching node. The downstream flow channel is connected to the main confluence node.

In this embodiment, a first main channel connects multiple upstream sub-channels, which helps to simplify the structural layout of the main diversion and collection area and save space.

In one embodiment, each main flow channel includes an upstream flow channel and a downstream flow channel. The downstream flow channel includes multiple downstream sub-flow channels that are all connected to the upstream flow channel. The multiple downstream sub-flow channels extend along a first direction and are arranged opposite to each other and spaced apart in a second direction. Each downstream sub-flow channel is connected to the main confluence node. The upstream flow channel is connected to the main branch node.

In this embodiment, a second main channel connects multiple downstream sub-channels, which helps to simplify the structural layout of the main diversion and collection area and save space.

In one embodiment, each main flow channel section includes an upstream flow channel and a downstream flow channel. The upstream flow channel in some main flow channel sections is arranged adjacent to the upstream flow channel in the adjacent main flow channel section, and the downstream flow channel in some main flow channel sections is arranged adjacent to the downstream flow channel in the adjacent main flow channel section.

In this embodiment, arranging multiple upstream channels adjacent to each other or multiple downstream channels adjacent to each other can shorten the flow path of the main channel, thereby reducing heat loss and improving heat exchange capacity.

In one embodiment, the refrigerant heat exchange component further includes an inlet and outlet area, which includes a first flow channel and a second flow channel. The flow direction of the refrigerant in the first flow channel is opposite to that in the second flow channel. Multiple main heat exchange channels are symmetrically arranged on both sides of a symmetry axis parallel to the first direction, and the inlet and outlet area is arranged at one end of the symmetry axis. Both the first flow channel and the second flow channel are connected to the main flow channel.

In this embodiment, the inlet and outlet areas are arranged at one end of the axis of symmetry, which is beneficial to achieving uniform and symmetrical distribution of the refrigerant after it enters the refrigerant flow channel component.

In one embodiment, the number of battery cell packs is equal to the number of main heat exchange channels.

In this embodiment, the number of battery cell groups is equal to the number of main heat exchange channels, which can achieve balanced and stable heat exchange for each battery cell group in a targeted manner.

In one embodiment, the battery cell pack has a first length in a first direction, and each heat exchange channel forms a heat exchange surface on the surface of the refrigerant heat exchange component. The heat exchange surface has a second length in the first direction, and the ratio of the first length to the second length is in the range of 0.8-1.2.

In this embodiment, by controlling the relative lengths of the battery cell group and the heat exchange surface in the first direction, the battery cells can be rationally arranged to reduce energy waste and improve heat exchange efficiency.

In one embodiment, the refrigerant heat exchange component has a heat exchange surface opposite to the battery cell assembly, each main heat exchange channel is configured to be opposite to the heat exchange surface, and the ratio of the area of the projected area of each main heat exchange channel on the heat exchange surface to the area of the heat exchange surface is greater than or equal to 0.4 and less than or equal to 0.8.

In this embodiment, by reasonably controlling the proportion of the projected area of the main heat exchange channel on the heat exchange surface, it is possible to ensure that there is sufficient heat exchange area between the refrigerant and the battery cell, reduce the risk of the main heat exchange channel being too dense or too sparse, optimize the heat exchange effect, and facilitate the design and manufacturing of the main heat exchange channel.

In one embodiment, the refrigerant heat exchange component has a first surface and a second surface opposite to each other, the first surface being disposed opposite to the battery cell assembly; the refrigerant heat exchange component includes a plurality of mounting holes, which are disposed through the first surface and the second surface and are disposed to avoid the main heat exchange channel.

In this embodiment, by providing mounting holes, it is easy to connect and fix the refrigerant heat exchange component to other components using bolts or other locking devices, thereby improving the convenience of connecting the refrigerant heat exchange component to other components.

In one embodiment, a plurality of mounting holes are arranged in the central region of the refrigerant heat exchange component along a first direction and spaced apart along a second direction; and/or, a plurality of mounting holes are arranged in the central region of the refrigerant heat exchange component along the second direction and spaced apart along the first direction.

In this embodiment, multiple mounting holes are arranged in the middle of the refrigerant heat exchange component and are evenly distributed in the second direction, which helps to improve the balance of the force on the refrigerant heat exchange component and makes the layout between the main heat exchange channel and the mounting holes more regular.

In one embodiment, the spacing between two adjacent mounting holes ranges from 300mm to 1000mm; and/or

The outer diameter of the mounting hole is 30mm-60mm.

In this embodiment, considering that the arrangement of mounting holes affects the strength and rigidity of the refrigerant heat exchange component and the connection stability, the spacing of the mounting holes is controlled between 300mm and 1000mm and the outer diameter of the mounting holes is controlled between 30mm and 60mm. This allows for a further balance between the rigidity and strength of the refrigerant heat exchange component and the connection stability.

In one embodiment, the refrigerant heat exchange component also has multiple cavities inside, and each cavity is configured to avoid the main heat exchange flow channel.

In this embodiment, by setting multiple cavities, the flow can be guided and the air can be vented during the welding process, which is beneficial to improving the welding quality and welding sealing, and also to improving the overall structural strength of the refrigerant heat exchange component.

Secondly, this application provides a refrigerant heat exchange device, which includes a refrigerant heat exchange component in a battery device as described in any of the above claims.

Thirdly, this application provides an electrical device, including a battery device as described in any of the above, the battery device being used to store or provide electrical energy.

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

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.

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

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

Figure 3 is a schematic diagram of the exploded structure of a battery device provided in some embodiments of this application;

Figure 4 is an exploded structural diagram of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

Figure 5 is a schematic diagram of the internal structure of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

Figure 6 is a schematic diagram of the arrangement structure of the main heat exchange channel in the heat exchange zone of the refrigerant heat exchange component provided in some embodiments of this application;

Figure 7 is a diagram showing the relative positional relationship between the internal flow channel of the refrigerant heat exchange component and the battery cell assembly in a battery device provided in some embodiments of this application.

Figure 8 shows the relative positions of the refrigerant heat exchange component and the battery cell assembly in some embodiments of this application.

Figure 9 is a schematic diagram of the structure of a main heat exchange channel in the refrigerant heat exchange component of a battery device provided in some embodiments of this application;

Figure 10 is a schematic diagram of the structure of a main heat exchange channel in the refrigerant heat exchange component of a battery device provided in some embodiments of this application;

Figure 11 is a schematic diagram of the flow channel distribution in the main flow distribution area of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

Figure 12 is a schematic diagram of the flow channel distribution in the inlet and outlet areas of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

Figure 13 is a schematic diagram of the projected area of the main heat exchange channel and the area of the heat exchange surface in the refrigerant heat exchange component of the battery device provided in some embodiments of this application.

Figure 14 is a schematic diagram showing the distribution of mounting holes on the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

Figure 15 is a schematic diagram showing the distribution of mounting holes on the refrigerant heat exchange component in a battery device provided in some embodiments of this application (II).

Figure 16 is a schematic diagram showing the distribution of mounting holes on the refrigerant heat exchange component in some embodiments of this application;

Figure 17 is a magnified view of a portion of position A in Figure 5.

Explanation of reference numerals in the attached figures:
1000. Vehicle; 1100. Battery unit; 1110. Battery cell assembly; 1111. Battery cell group; 1112. Battery cell; 1120. Housing assembly; 1121. Housing body; 1122. Cover; 1123. Housing frame; 1124. Receiving cavity; 1125. Housing bottom plate; 1130. Refrigerant heat exchange components; 1131. Inlet/outlet area; 11311. First flow channel; 11312. Second flow channel; 1132. Main branch and collector area; 11321. Main flow channel; 11322. First main flow channel; 11323. Second main flow channel; 1133. Heat exchange area; 11331. 11332 Main heat exchange flow channel; 11333 Main branch node; 11334 Main flow channel; 11335 Main confluence node; 11336 Heat exchange sub-flow channel; 11337 Downstream flow channel; 11338 Upstream sub-flow channel; 11339 Downstream sub-flow channel; 1134 Heat exchange surface; 1135 First surface; 1136 First sub-component; 1137 Second sub-component; 1138 Cavity; 1139 Mounting hole; 1140 Connector component; 1200 Controller; 1300 Motor; X, First direction; Y, Second direction; L1, First length; L2, Second length.

Detailed Implementation

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.

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.

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.

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.

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.

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).

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.

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.

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.

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 refrigerant heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

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 refrigerant 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. This results in a large accumulation of heat inside the battery pack, affecting its performance and lifespan, and potentially causing 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.

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 device, increase internal resistance, reduce energy density, and in severe cases, may cause thermal runaway. Therefore, refrigerant heat exchange components are installed in battery devices to cool the individual battery cells.

Regarding the issue of uneven temperature distribution and localized high temperatures within battery devices, research has revealed that refrigerant heat exchange components employing refrigerant heat exchange have numerous flow channels arranged in a chaotic manner. Channels with high heat exchange capacity interweave with those with lower capacity, exhibiting no regularity. This leads to an unpredictable temperature distribution within the refrigerant heat exchange component. Consequently, when these flow channels are paired with individual battery cells, they cannot be matched to the specific arrangement of the individual cells within the battery cell assembly, hindering the targeted and balanced heat exchange of the battery cell assembly.

Therefore, this application provides a battery device in which a plurality of main heat exchange channels are arranged in parallel in a second direction inside the refrigerant heat exchange component, and the battery cell assembly is correspondingly distributed in the second direction into a plurality of battery cell groups. Each battery cell group can cover at least one main heat exchange channel, so that the battery cell assembly and the main heat exchange channel are matched and set so that each battery cell group can exchange heat through at least one main heat exchange channel, thereby ensuring the heat exchange area of the main heat exchange channel for each battery cell group, and thus improving the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery cell assembly.

Specifically, referring to Figures 2 and 3, this application embodiment provides a battery apparatus 1100, which may include one or more battery cell assemblies 1110 for providing voltage and capacity. Each battery cell assembly may include multiple battery cells 1112, which are connected in series, parallel, or mixed connections via a busbar. The battery apparatus 1100 may also be a battery pack, which generally includes a housing assembly 1120 and one or more battery cell assemblies 1110, with the battery cell assemblies 1110 housed within the housing assembly.

The battery device 1100 disclosed in this application can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and systems that use the battery device 1100 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, 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.

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.

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 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

In some embodiments of this application, the battery device 1100 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.

Please refer to Figures 2 and 3, which are exploded views of the battery device 1100 provided in some embodiments of this application. In one embodiment, the battery device 1100 includes a housing assembly 1120 and a battery cell assembly 1110. A receiving cavity 1124 is formed within the housing assembly 1120, and the battery cell assembly 1110 is housed within the receiving cavity 1124. The battery cell assembly 1110 is typically formed by arranging multiple battery cells 1112. Alternatively, the battery cell assembly 1110 can also be a battery module, which is formed by arranging and fixing multiple battery cells 1112 to form an independent module, namely a battery cell group 1111. The housing assembly 1120 is used to provide the receiving cavity 1124 for the battery cell assembly 1110, and the housing assembly 1120 can adopt various structures.

A battery cell 1112 refers to the smallest unit that makes up the battery device 1100. Each battery cell 1112 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. The battery cell 1112 can be cylindrical, flat, cuboid, or other shapes.

According to some embodiments of this application, referring to Figures 2-7, this application provides a battery device 1100, which includes a housing assembly 1120, a battery cell assembly 1110, and a refrigerant heat exchange component 1130. The housing assembly 1120 has a receiving cavity 1124. The battery cell assembly 1110 is disposed within the receiving cavity 1124. The battery cell assembly 1110 includes multiple rows of battery cell groups 1111, each row of battery cell groups 1111 including multiple battery cells 1112 stacked in a first direction X, and the multiple rows of battery cell groups 1111 are arranged side by side in a second direction Y. The refrigerant heat exchange component 1130 has a heat exchange surface 1134, which is configured to interact with the battery cell groups. Heat exchange is performed by component 1110; refrigerant heat exchange component 1130 includes multiple main heat exchange channels 11331, which are arranged in parallel in the second direction Y; each main heat exchange channel 11331 includes a main branch node 11332, a main confluence node 11334, and a main zone channel 11333, which is connected between the main branch node 11332 and the main confluence node 11334; each main zone channel 11333 includes multiple parallel heat exchange sub-channels 11335; the projection area of each row of battery cells 1111 on the heat exchange surface 1134 covers at least one main heat exchange channel 11331; the second direction Y is perpendicular to the first direction X.

Since the refrigerant heat exchange component 1130 needs to exchange heat with the battery cell assembly 1110, the refrigerant heat exchange component 1130 needs to be located close to the battery cell assembly 1110, or the refrigerant heat exchange component 1130 needs to directly contact or abut against the battery cell assembly 1110, thereby improving the heat exchange effect. When the refrigerant heat exchange component 1130 exchanges heat with the battery cell assembly 1110, a large heat exchange area needs to be formed between the refrigerant heat exchange component 1130 and the battery cell 1112 to improve the heat exchange effect. Therefore, a heat exchange surface 1134 that is close to or in contact with the surface of the battery cell 1112 will be formed on the refrigerant heat exchange component 1130.

The surface of the battery cell 1112 that is close to or in contact with the heat exchange surface 1134 can be the bottom surface or the side surface of the battery cell 1112. Taking the battery device 1100 as a horizontally placed example, the surface below the battery cell 1112 is the bottom surface, and the surface of the battery cell 1112 along the vertical direction is the side surface. In this embodiment, the heat exchange surface 1134 of the refrigerant heat exchange component 1130 can be in contact with or close to the bottom surface or the side surface of the battery cell 1112. That is to say, the refrigerant heat exchange component 1130 can be located at the bottom of the battery cell assembly 1110 or at the side of the battery cell assembly 1110. The refrigerant heat exchange component 1130 located at the bottom of the battery cell assembly 1110 can also be called a heat exchange base plate or a cooling base plate.

For ease of explanation, the following embodiments will be described using an example of a battery device 1100 of this application that is placed horizontally, with the refrigerant heat exchange component 1130 located at the bottom of the battery cell assembly 1110.

Specifically, for the battery cell assembly 1110, the battery cell assembly 1110 includes multiple rows or multiple battery cell groups 1111. The multiple rows of battery cell groups 1111 are arranged side by side in the second direction Y. Each row of battery cell group 1111 includes multiple battery cells 1112. The battery cells 1112 can be cubic or cylindrical. The battery cells 1112 in each row of battery cell group 1111 are all stacked and arranged sequentially along the first direction X. The second direction Y is a direction perpendicular to the first direction X.

Referring to Figures 5 and 6, the main heat exchange channel 11331 inside the refrigerant heat exchange component 1130 can be a hole structure inside the refrigerant heat exchange component 1130. For example, the refrigerant heat exchange component 1130 is plate-shaped, and a through hole structure or cavity structure with a certain extension length and extension path is opened in the plate of the refrigerant heat exchange component 1130. This through hole structure or cavity structure forms the main heat exchange channel 11331. The refrigerant heat exchange component 1130 can be integrally molded, and the main heat exchange channel 11331 can be manufactured using gas-assisted or water-assisted molding. Alternatively, the refrigerant heat exchange component 1130 can also be assembled. For example, the refrigerant heat exchange component 1130 includes a first sub-component 1136 and a second sub-component 1137. A groove structure with a preset extension length and shape is formed on the second sub-component 1137. The groove structure can be manufactured by stamping. The first sub-component 1136 and the second sub-component 1137 are fixedly or detachably connected, and the groove opening is closed to form a through-hole structure or a cavity structure, which forms the main heat exchange channel 11331. The main heat exchange channel 11331 should be located close to the heat exchange surface 1134, and the extension path of the main heat exchange channel 11331 can be parallel to the heat exchange surface 1134 to increase the heat exchange effect. The battery cell assembly 1110 is arranged opposite to the heat exchange surface 1134.

For example, the first sub-component 1136 can be an upper plate, and the second sub-component 1137 can be a lower plate. The main heat exchange channel 11331 is formed on the lower plate by stamping. The first sub-component 1136 and the second sub-component 1137 can be welded together by brazing, and the welded area can play a role in heat transfer.

The first direction X and the second direction Y are both parallel to the heat exchange surface 1134. The first direction X and the second direction Y are two perpendicular directions. There are multiple main heat exchange channels 11331. The extension direction of each main heat exchange channel 11331 is along the first direction X. It can be understood that each main heat exchange channel 11331 includes multiple channel structures. The multiple channel structures are interconnected and all extend along the first direction X. The multiple main heat exchange channels 11331 are arranged at intervals and connected in the second direction Y to form a parallel channel structure. It can be seen that the multiple main heat exchange channels 11331 and the multiple rows of battery cell groups 1111 are arranged in sequence in the second direction Y. The multiple battery cells 1112 in each row of battery cell groups 1111 are arranged in sequence along the extension direction of the main heat exchange channel 11331.

Since the battery cell assembly 1110 is arranged opposite to the heat exchange surface 1134, it can be known that each row of battery cell assembly 1111 forms a projection area on the heat exchange surface 1134, so that the projection area of each row of battery cell assembly 1111 on the heat exchange surface 1134 covers at least one main heat exchange channel 11331.

One possible scenario is that the projected area of each row of battery cells 1111 on the heat exchange surface 1134 covers a main heat exchange channel 11331. That is, a main heat exchange channel 11331 provides targeted heat exchange for a row of battery cells 1111. Each row of battery cells 1111 will exchange heat through a main heat exchange channel 11331. As long as the structure of each main heat exchange channel 11331 is the same, and the flow rate, pressure and other data of the refrigerant in each main heat exchange channel 11331 are the same, it can be known that the heat exchange capacity of each main heat exchange channel 11331 is the same. Therefore, balanced heat exchange for each row of battery cells 1111 can be achieved.

In some cases, the projected area of each row of battery cells 1111 on the heat exchange surface 1134 may cover one main heat exchange channel 11331 and a portion of an adjacent main heat exchange channel 11331. Alternatively, the projected area of each row of battery cells 1111 on the heat exchange surface 1134 may cover multiple main heat exchange channels 11331, thereby enhancing the heat exchange capacity of the main heat exchange channels 11331 for each row of battery cells 1111. To improve the effect of balanced heat exchange, the number of main heat exchange channels 11331 corresponding to each row of battery cells 1111 may be the same, where the number may be a fraction or decimal. For example, the projected area of each row of battery cells 1111 on the heat exchange surface 1134 may cover one main heat exchange channel 11331 and half of an adjacent main heat exchange channel 11331.

In this embodiment, the battery cell assembly 1110 is arranged into multiple rows of battery cell groups 1111. Corresponding to each row of battery cell groups 1111, the refrigerant heat exchange component 1130 forms multiple main heat exchange channels 11331 arranged accordingly. The multiple main heat exchange channels 11331 are connected in parallel in the arrangement direction of the battery cell groups 1111, and the extension direction of each main heat exchange channel 11331 is consistent with the arrangement direction of the multiple battery cells 1112 in each row of battery cell groups 1111. This allows the multiple battery cells 1112 in each row of battery cell groups 1111 to have a larger heat exchange area with the main heat exchange channels 11331. Each main heat exchange channel 11331 can more effectively exchange heat with each battery cell group 1111, which is beneficial to improving the effect of balanced heat exchange.

In some embodiments, as shown in FIG5, FIG6 and FIG9, each main heat exchange channel 11331 includes a main branch node 11332, a main confluence node 11334 and a main zone channel 11333, the main zone channel 11333 being connected between the main branch node 11332 and the main confluence node 11334; the projection area of each row of battery cell group 1111 on the refrigerant heat exchange component 1130 covers at least one main heat exchange channel 11331, or at least one main zone channel 11333.

Specifically, since the refrigerant flows along the extension direction of the main heat exchange channel 11331, it can be understood that the main heat exchange channel 11331 forms an inlet and an outlet at both ends of the extension direction, and the main flow area is formed between the inlet and the outlet. It can be understood that each main heat exchange channel 11331 includes a main branch node 11332, a main confluence node 11334, and a main flow channel 11333. The main branch node 11332 can be considered as the inlet part of the main heat exchange channel 11331, the main confluence node 11334 can be considered as the outlet part of the main heat exchange channel 11331, and the main flow channel 11333 can be considered as the flow part between the inlet and the outlet. The projected area of each row of battery cells 1111 on the refrigerant heat exchange component 1130 covers at least one main heat exchange channel 11331. Specifically, this includes cases where the projected area of each row of battery cells 1111 on the refrigerant heat exchange component 1130 covers one main heat exchange channel 11331; or, while covering one main heat exchange channel 11331, the projected area of each row of battery cells 1111 on the refrigerant heat exchange component 1130 can also cover a portion of an adjacent main heat exchange channel 11331; or, the projected area of each row of battery cells 1111 on the heat exchange surface 1134 can cover multiple main heat exchange channels 11331, thereby enhancing the heat exchange capacity of the main heat exchange channels 11331 for each row of battery cells 1111.

Optionally, the main branch node 11332 and the main confluence node 11334 mentioned above can be considered as the convergence and intersection of multiple branch channels. Therefore, the resistance, flow rate and pressure drop of the refrigerant will generally be affected. As a result, the heat exchange capacity of the main branch node 11332 and the main confluence node 11334 is prone to instability. Therefore, the battery cell group 1111 can be arranged to avoid the main branch node 11332 and the main confluence node 11334, so that the battery cell group 1111 is concentrated in the area corresponding to the main channel section 11333.

Similarly, it is necessary to ensure that the projection area of each row of battery cell groups 1111 on the refrigerant heat exchange component 1130 covers at least one main flow channel section 11333. For example, the projection area of each row of battery cell groups 1111 on the heat exchange surface 1134 covers one main flow channel section 11333. That is, one main flow channel section 11333 performs targeted heat exchange on one row of battery cell groups 1111. Each row of battery cell groups 1111 will exchange heat through one main flow channel section 11333. As long as the structure of each main heat exchange channel 11331 is the same and the refrigerant flow rate, pressure and other data in each main flow channel section 11333 are the same, it can be known that the heat exchange capacity of each main flow channel section 11333 is the same. Therefore, balanced heat exchange on each row of battery cell groups 1111 can be achieved.

For example, the projected area of each row of battery cells 1111 on the heat exchange surface 1134 may cover one main flow channel section 11333 and a portion of an adjacent main flow channel section 11333. Alternatively, the projected area of each row of battery cells 1111 on the heat exchange surface 1134 may cover multiple main flow channel sections 11333, thereby enhancing the heat exchange capacity of the main flow channel sections 11333 for each row of battery cells 1111. To improve the effect of balanced heat exchange, the number of main flow channel sections 11333 corresponding to each row of battery cells 1111 may be the same, where the number may be a fraction or decimal. For example, the projected area of each row of battery cells 1111 on the heat exchange surface 1134 may cover one main flow channel section 11333 and half of an adjacent main flow channel section 11333.

In this embodiment, the battery cell assembly 1110 is matched and configured with the main heat exchange channel 11333 in the main heat exchange channel 11331, which has a strong temperature uniformity capability, thereby further improving the ability to achieve balanced heat exchange of the battery cell assembly 1110.

In some embodiments, as shown in FIG6, each main flow channel 11333 includes a plurality of parallel heat exchange sub-flow channels 11335.

Specifically, the heat exchanger sub-channel 11335 can be understood as a direct current channel structure. Each heat exchanger sub-channel 11335 is arranged in parallel and connected to each other, so that the refrigerant can flow back and forth in each heat exchanger sub-channel 11335.

In this embodiment, by arranging the main flow channel 11333 into a structure in which multiple heat exchange sub-flow channels 11335 are arranged in parallel and spaced apart, it is beneficial to increase the number of flow channels and adjust the width of the heat exchange sub-flow channels 11335 to a suitable range, thereby increasing the corresponding heat exchange area between the main flow channel 11333 and the battery cell assembly 1110, thereby improving the heat exchange capacity and the flow rate of the refrigerant, thereby improving the heat exchange efficiency.

In some embodiments, as shown in FIG6, each heat exchange sub-channel 11335 extends along a first direction X and is spaced apart in a second direction Y.

Specifically, the heat exchange sub-channels 11335 are all extended along the first direction X, so that each row of battery cell groups 1111 can cover the length direction of the heat exchange sub-channels 11335, which helps to increase the area of each row of battery cell groups 1111 corresponding to the main area channel 11333, and thus helps to increase the heat exchange area. Multiple heat exchange sub-channels 11335 are also spaced apart in the second direction Y, so that the main flow section 11333 is divided into multiple narrower channels in the second direction Y (or the width direction of the refrigerant heat exchange component 1130). Compared with a wider channel, this can increase the refrigerant flow rate and improve heat exchange efficiency. In addition, by adjusting the spacing between two adjacent heat exchange sub-channels 11335 and controlling the width of each heat exchange sub-channel 11335, a larger number of heat exchange sub-channels 11335 can be matched with each battery cell 1112, increasing the arrangement density of heat exchange sub-channels 11335 in the main flow section 11333.

In this embodiment, by arranging the main flow channel 11333 into a structure in which multiple heat exchange sub-flow channels 11335 are arranged in parallel and spaced apart, it is beneficial to increase the number of flow channels and adjust the width of the heat exchange sub-flow channels 11335 to a suitable range, thereby increasing the corresponding heat exchange area between the main flow channel 11333 and the battery cell assembly 1110, thereby improving the heat exchange capacity and the flow rate of the refrigerant, thereby improving the heat exchange efficiency.

In some embodiments, as shown in Figures 5 and 6, along the first direction X, the main branch node 11332 and the main confluence node 11334 are both located at the same end of the main flow channel 11333.

Specifically, since the main heat exchange channel 11331 extends along the first direction X, it can be known that the main heat exchange channel 11331 has two ends in the first direction X. The same end refers to the position of one of the two ends of the main heat exchange channel 11331. That is to say, the refrigerant enters the main zone channel 11333 (specifically the upstream channel 11336) from one end through the main branch node 11332, and then flows from the main zone channel 11333 (specifically the downstream channel 11337) to the main confluence node 11334 located at the same end. It can be known that when the refrigerant flows in a main heat exchange channel 11331, it enters from the same end and exits from the same end.

The above design allows the main flow distribution area 1132 to be arranged on the same side of the main heat exchange channel 11331 in the first direction X, so as to achieve a regular layout.

For example, along the second direction Y, multiple main branch nodes 11332 and multiple main confluence nodes 11334 are arranged on the same straight line, or, along the second direction Y, a distribution area with a certain width is formed. This distribution area has a certain width in the first direction X and extends in a strip shape along the second direction Y. In this case, multiple main branch nodes 11332 and multiple main confluence nodes 11334 are all distributed in this distribution area.

In this embodiment, the main branch node 11332 and the main confluence node 11334 are both located at the same end of the main flow channel 11333, so that other pipes connected to the main branch node 11332 and the main confluence node can be concentrated on one side of the main heat exchange flow channel 11331, which helps to improve the concentration of other flow channel arrangements.

In some embodiments, referring to Figures 5 and 11, the refrigerant heat exchange component 1130 includes a main flow distribution and collection area 1132 and a heat exchange area 1133. The main heat exchange channels 11331 are distributed in the heat exchange area 1133. The main flow distribution and collection area 1132 includes a plurality of trunk channels 11321. Some trunk channels 11321 are connected to the main flow distribution node 11332, and other trunk channels 11321 are connected to the main flow junction node 11334. The number of trunk channels 11321 is less than or equal to the sum of the number of main flow distribution nodes 11332 and main flow junction nodes 11334.

Specifically, the refrigerant heat exchange component 1130 may include at least two parts, namely the main flow distribution area 1132 and the heat exchange area 1133. Both the main flow distribution area 1132 and the heat exchange area 1133 have refrigerant channels distributed within them, which are used for the flow of refrigerant. The refrigerant flow channels within the main distribution and collection area 1132 are called trunk flow channels 11321. The trunk flow channels 11321 serve the functions of distribution and convergence. It can be understood that the main distribution and collection area 1132 includes multiple trunk flow channels 11321. A portion of the multiple trunk flow channels 11321 within the main distribution and collection area 1132 is used for distribution, and this portion of the trunk flow channels 11321 can be connected to the main distribution node 11332 in the main heat exchange flow channel 11331. The other trunk flow channels 11321 within the main distribution and collection area 1132 are used for convergence, and this portion of the trunk flow channels 11321 can be connected to the main convergence node 11334 in the main heat exchange flow channel 11331. The main flow distribution area 1132 can be configured to avoid the projection of the battery cell assembly 1110 onto the refrigerant heat exchange component 1130. That is, the battery cell assembly 1110 may not be opposite to the main flow distribution area 1132. The refrigerant flow channel in the heat exchange area 1133 is called the main heat exchange flow channel 11331. The heat exchange area 1133 is mainly used for heat exchange with the battery cell assembly 1110. Therefore, the heat exchange area 1133 needs to be set opposite to the battery cell assembly 1110. That is, the heat exchange area 1133 may coincide with the projection of the battery cell assembly 1110 onto the refrigerant heat exchange component 1130. The refrigerant flow channel in the heat exchange area 1133 is configured to exchange heat with the battery cell assembly 1110.

The number of main flow channels 11321 is less than or equal to the sum of the number of main branch nodes 11332 and main confluence nodes 11334. When the number of main flow channels 11321 is equal to the sum of the number of main branch nodes 11332 and main confluence nodes 11334, it can be seen that each branch node and confluence node has an independent corresponding main flow channel 11321. This makes the refrigerant distribution and collection process more precise and the flow smoother. It is also conducive to making the heat exchange capacity of each main heat exchange channel 11331 consistent, so as to make the temperature distribution on the heat exchange surface 1134 more uniform.

When the number of main flow channels 11321 is less than the sum of the number of main branch nodes 11332 and main confluence nodes 11334, multiple branch nodes will share one main flow channel 11321, or multiple confluence nodes will share one main flow channel 11321, or both of the above exist. The number of main flow channels 11321 will be reduced, which can optimize and simplify the structure of the internal main branch and confluence area 1132 of the refrigerant heat exchange component 1130, and help to make more rational use of the internal space of the refrigerant heat exchange component 1130. In addition, with an inlet/outlet area 1131 provided, since the inlet/outlet area 1131 is located upstream of the main diversion and collection area 1132, the number of trunk channels 11321 can be reduced so that the number of channels in the inlet/outlet area 1131 is consistent with the number of trunk channels 11321. The number of channels in the inlet/outlet area 1131 can be relatively reduced, which facilitates the one-to-one matching and connection of trunk channels 11321 with the channels in the inlet/outlet area 1131, and helps to simplify and optimize the channel layout in the inlet/outlet area 1131.

In this embodiment, by controlling the number of trunk flow channels 11321, the layout and structure of trunk flow channels 11321 within the main diversion and collection area 1132 can be rationally planned, thereby improving space utilization and achieving the purpose of uniform diversion and concentrated convergence.

In some embodiments, referring to Figures 5 and 9-11, the plurality of trunk flow channels 11321 are divided into a plurality of first trunk flow channels 11322 and a plurality of second trunk flow channels 11323. Each main flow channel section 11333 includes an upstream flow channel 11336 and a downstream flow channel 11337. The first trunk flow channels 11322, the main branch node section 11332, the upstream flow channel 11336, the downstream flow channel 11337, the main confluence node section 11334, and the second trunk flow channels 11323 are sequentially connected. The number of first trunk flow channels 11322 is less than the sum of the number of main branch node sections 11332.

Specifically, the upstream flow channel 11336 can be understood as an inlet flow channel, and the downstream flow channel 11337 can be understood as a loop flow channel, with the refrigerant flowing from the upstream flow channel 11336 into the downstream flow channel 11337.

The first main flow channel 11322 can be understood as the flow channel in the inflow direction, where refrigerant flows from the first main flow channel 11322 into the upstream flow channel 11336 via the main branch node 11332. The second main flow channel 11323 can be understood as the flow channel in the outflow direction, where refrigerant flows from the downstream flow channel 11337 into the second main flow channel 11323 via the main confluence node 11334. The first main flow channel 11322, the main branch node 11332, the upstream flow channel 11336, the downstream flow channel 11337, the main confluence node 11334, and the second main flow channel 11323 are sequentially connected to form a circulation loop.

Regarding the number of first main flow channels 11322, the number of first main flow channels 11322 is less than or equal to the sum of the number of main branch nodes 11332. When the number of first main flow channels 11322 is equal to the sum of the number of main branch nodes 11332, it can be seen that each branch node corresponds to an independent first main flow channel 11322. This makes the refrigerant distribution process more precise and the flow smoother, which is conducive to making the heat exchange capacity of each main heat exchange channel 11331 consistent, so as to make the temperature distribution on the heat exchange surface 1134 more uniform.

When the number of first main flow channels 11322 is less than the sum of the number of main branch nodes 11332, multiple branch nodes will share one first main flow channel 11322, reducing the number of first main flow channels 11322. This can optimize and simplify the structure within the main branch flow collection area 1132 of the refrigerant heat exchange component 1130, making it less likely for the first main flow channel 11322 to interfere with the second main flow channel 11323, and helping to make more rational use of the internal space of the refrigerant heat exchange component 1130. In addition, with an inlet/outlet area 1131 provided, since the inlet/outlet area 1131 is located upstream of the main diversion and collection area 1132, after the number of the first trunk flow channels 11322 is reduced, the number of flow channels in the inlet/outlet area 1131 (specifically the first flow direction flow channel 11311 or the inflow direction flow channel) can be set to be consistent with the number of the first trunk flow channels 11322. The number of flow channels in the inlet/outlet area 1131 can be relatively reduced, which facilitates the one-to-one matching and connection of the first trunk flow channels 11322 with the flow channels in the inlet/outlet area 1131, and helps to simplify and optimize the flow channel layout in the inlet/outlet area 1131.

In this embodiment, by controlling the number of first trunk channels 11322, the layout and structure of the first trunk channels 11322 in the main diversion and collection area 1132 can be rationally planned, which is conducive to avoiding the second trunk channels 11323, improving space utilization, and achieving the purpose of uniform diversion.

In some embodiments, referring to Figures 5 and 9-11, the plurality of trunk flow channels 11321 are divided into a plurality of first trunk flow channels 11322 and a plurality of second trunk flow channels 11323. Each main flow channel section 11333 includes an upstream flow channel 11336 and a downstream flow channel 11337. The first trunk flow channels 11322, the main branch node section 11332, the upstream flow channel 11336, the downstream flow channel 11337, the main confluence node section 11334, and the second trunk flow channels 11323 are sequentially connected. The number of second trunk flow channels 11323 is less than or equal to the sum of the number of main confluence node sections 11334.

Similarly, the upstream flow channel 11336 can be understood as an inlet flow channel, and the downstream flow channel 11337 can be understood as a loop flow channel, with refrigerant flowing from the upstream flow channel 11336 into the downstream flow channel 11337. The first main flow channel 11322 can be understood as a flow channel in the inflow direction, with refrigerant flowing from the first main flow channel 11322 into the upstream flow channel 11336 via the main branch node 11332. The second main flow channel 11323 can be understood as a flow channel in the outflow direction, with refrigerant flowing from the downstream flow channel 11337 into the second main flow channel 11323 via the main confluence node 11334. The first main flow channel 11322, the main branch node 11332, the upstream flow channel 11336, the downstream flow channel 11337, the main confluence node 11334, and the second main flow channel 11323 are sequentially connected to form a circulation loop.

Regarding the number of second trunk flow channels 11323, the number of second trunk flow channels 11323 is less than or equal to the sum of the number of main junction nodes 11334. When the number of second trunk flow channels 11323 is equal to the sum of the number of main junction nodes 11334, it can be seen that each junction node corresponds to an independent second trunk flow channel 11323. This makes the refrigerant distribution process more precise and the flow smoother, which is conducive to making the heat exchange capacity of each main heat exchange channel 11331 consistent, so as to make the temperature distribution on the heat exchange surface 1134 more uniform.

When the number of second trunk flow channels 11323 is less than the sum of the number of main flow junctions 11334, multiple flow junctions will share one second trunk flow channel 11323, reducing the number of second trunk flow channels 11323. This can optimize and simplify the structure within the main flow distribution area 1132 of the refrigerant heat exchange component 1130, making it less likely for the second trunk flow channels 11323 to interfere with the first trunk flow channels 11322, and helping to make more rational use of the space inside the refrigerant heat exchange component 1130. In addition, with the inlet and outlet area 1131 provided, since the inlet and outlet area 1131 can also be considered to be distributed downstream of the main diversion and collection area 1132, after the number of the second trunk flow channels 11323 is reduced, the number of flow channels in the inlet and outlet area 1131 (specifically the second flow direction flow channel 11312 or the flow channel in the outflow direction) can be set to be consistent with the number of the second trunk flow channels 11323. The number of flow channels in the inlet and outlet area 1131 can be relatively reduced, which facilitates the one-to-one matching and connection of the second trunk flow channels 11323 with the flow channels in the inlet and outlet area 1131, which is conducive to simplifying and optimizing the flow channel layout in the inlet and outlet area 1131.

In this embodiment, by controlling the number of second trunk flow channels 11323, the layout and structure of the second trunk flow channels 11323 within the main diversion and collection area 1132 can be rationally planned, which is beneficial to avoid the first trunk flow channel 11322, improve space utilization, and achieve the purpose of uniform diversion.

In some embodiments, as shown in FIG10, each main flow channel 11333 includes an upstream flow channel 11336 and a downstream flow channel 11337. The upstream flow channel 11336 includes a plurality of upstream sub-flow channels 11338, each of which is connected to the downstream flow channel 11337. The plurality of upstream sub-flow channels 11338 extend along a first direction X and are arranged opposite to each other and spaced apart in a second direction Y. Each upstream sub-flow channel 11338 is connected to the main branch node 11332. The downstream flow channel 11337 is connected to the main confluence node 11334.

Specifically, the upstream flow channel 11336 may include multiple upstream sub-flow channels 11338. These multiple upstream sub-flow channels 11338 extend in the first direction X and are opposite and spaced apart in the second direction Y, thus forming a structure in which multiple direct-flow channels are connected in parallel. This allows for the arrangement of a larger number of upstream sub-flow channels 11338 within the same area. Within the same area, the width of each upstream sub-flow channel 11338 becomes narrower and the density increases, thereby increasing the flow velocity of the refrigerant within each upstream sub-flow channel 11338. This, in turn, helps to increase the heat exchange area and improve the heat exchange efficiency.

Multiple upstream sub-channels 11338 are connected to the same main branch node 11332, and one or more main branch nodes 11332 can be connected to a first trunk channel 11322, thereby realizing a structure in which a first trunk channel 11322 connects multiple upstream sub-channels 11338. This is beneficial to improving the smoothness of refrigerant flow, reducing pressure drop loss, and simplifying the layout of the main branch collection area 1132, thus saving space.

In this embodiment, a first main channel 11322 connects multiple upstream sub-channels 11338, which helps to simplify the structural layout of the main diversion and collection area 1132 and save space.

In some embodiments, as shown in FIG10, each main flow channel 11333 includes an upstream flow channel 11336 and a downstream flow channel 11337. The downstream flow channel 11337 includes a plurality of downstream sub-flow channels 11339, each of which is connected to the upstream flow channel 11336. The plurality of downstream sub-flow channels 11339 extend along a first direction X and are arranged opposite to each other and spaced apart in a second direction Y. Each downstream sub-flow channel 11339 is connected to the main confluence node 11334. The upstream flow channel 11336 is connected to the main branch node 11332.

Specifically, the downstream flow channel 11337 may include multiple downstream sub-flow channels 11339. These multiple downstream sub-flow channels 11339 extend in the first direction X and are opposite and spaced apart in the second direction Y, thus forming a structure in which multiple direct-flow channels are connected in parallel. This allows for the arrangement of a larger number of downstream sub-flow channels 11339 within the same area. Within the same area, the width of each downstream sub-flow channel 11339 becomes narrower and the density increases, increasing the flow velocity of the refrigerant within each downstream sub-flow channel 11339. This, in turn, helps to increase the heat exchange area and improve the heat exchange efficiency.

Multiple downstream sub-channels 11339 are connected to the same main junction node 11334, and one or more main junction nodes 11334 can be connected to a second trunk channel 11323, thereby realizing a structure in which a second trunk channel 11323 connects multiple downstream sub-channels 11339. This is beneficial to improving the smoothness of refrigerant flow, reducing pressure drop loss, and simplifying the layout of the main branch and collection area 1132, thus saving space.

In this embodiment, a second main channel 11323 connects multiple downstream sub-channels 11339, which helps to simplify the structural layout of the main diversion and collection area 1132 and save space.

In some embodiments, referring to Figures 5 and 6, each main flow channel 11333 includes an upstream flow channel 11336 and a downstream flow channel 11337. The upstream flow channel 11336 in some main flow channel 11333 is arranged adjacent to the upstream flow channel 11336 in the adjacent main flow channel 11333, and the downstream flow channel 11337 in some main flow channel 11333 is arranged adjacent to the downstream flow channel 11337 in the adjacent main flow channel 11333.

Specifically, since multiple main heat exchange channels 11331 are arranged in parallel in the second direction Y, there must be two main heat exchange channels 11331 arranged adjacent to each other, and multiple sets of such adjacent main heat exchange channels 11331 can be set.

Since the main branch nodes 11332 in the main heat exchange channel 11331 all need to be connected to the first main channel 11322, and the upstream channels 11336 in the two main heat exchange channels 11331 are arranged adjacently, it can be seen that the distance between the main branch nodes 11332 of the two adjacent main heat exchange channels 11331 is relatively reduced. Therefore, when two adjacent main branch nodes are connected in a first main channel 11322, the flow path of the first main channel 11322 can be reduced, which is beneficial to reduce the flow path of the refrigerant and shorten the flow path of the refrigerant in the main branch collection area 1132.

Similarly, since the main junction nodes 11334 in the main heat exchange channel 11331 all need to be connected to the second trunk channel 11323, and the downstream channels 11337 in the two main heat exchange channels 11331 are arranged adjacently, it can be seen that the distance between the main junction nodes 11334 of the two adjacent main heat exchange channels 11331 is relatively reduced. Therefore, when two adjacent main junction nodes are connected by a second trunk channel 11323, the flow path of the second trunk channel 11323 can be reduced, which is beneficial to reduce the flow path of the refrigerant and shorten the flow path of the refrigerant in the main distribution and collection area 1132.

Since the main shunt current collection area 1132 is not primarily used for heat exchange with the battery cells 1112, shortening the flow path of the refrigerant within the main shunt current collection area 1132 helps reduce heat loss and improve the heat exchange capacity of the heat exchange area 1133.

In this embodiment, arranging multiple upstream channels 11336 adjacent to each other or multiple downstream channels 11337 adjacent to each other can shorten the flow path of the main channel, thereby reducing heat loss and improving heat exchange capacity.

In some embodiments, referring to Figures 5 and 12, the refrigerant heat exchange component 1130 further includes an inlet/outlet area 1131, which includes a first flow channel 11311 and a second flow channel 11312. The flow direction of the refrigerant in the first flow channel 11311 is opposite to that of the refrigerant in the second flow channel 11312. A plurality of main heat exchange channels 11331 are symmetrically arranged on both sides of a symmetry axis parallel to the first direction X, and the inlet/outlet area 1131 is arranged at one end of the symmetry axis.

Specifically, the axis of symmetry can be understood as the axis of symmetry of the heat exchange surface 1134. The main heat exchange channels 11331 on both sides of this axis of symmetry are arranged symmetrically, which helps to make the temperature distribution in the regions on both sides of the axis of symmetry on the heat exchange surface 1134 relatively symmetrical. The flow characteristics of the refrigerant in each of the main heat exchange channels 11331 on both sides of the axis of symmetry are more consistent. The pressure, flow rate and other parameters of each of the main heat exchange channels 11331 on both sides of the axis of symmetry are similar, which helps to make the refrigerant evenly distributed in the entire heat exchange zone 1133. This helps to reduce the problem of uneven refrigerant distribution caused by unreasonable channel arrangement, and further improves the uniformity and efficiency of heat exchange.

Since the inlet and outlet areas 1131 are concentrated on the axis of symmetry and located at one end, the refrigerant can be uniformly delivered from the center of symmetry to both sides of the axis of symmetry, which makes the refrigerant distribution in the main heat exchange channels 11331 on both sides of the axis of symmetry more symmetrical and uniform.

In this embodiment, the inlet and outlet areas 1131 are arranged at one end of the axis of symmetry, which is beneficial to achieving uniform and symmetrical distribution of the refrigerant after it enters the refrigerant flow channel component.

In some embodiments, as shown in Figures 7 and 8, the number of battery cell groups 1111 is equal to the number of main heat exchange channels 11331.

Specifically, the number of battery cell groups 1111 is equal to the number of main heat exchange channels 11331. This can be understood as one main heat exchange channel 11331 corresponding to one battery cell group 1111. That is, each battery cell group 1111 has an independent main heat exchange channel 11331, so that precise thermal management can be carried out according to the specific heat generation of the battery cell group 1111.

Different battery cell groups 1111 may generate varying degrees of heat during charging and discharging. By matching a battery cell group 1111 with a main heat exchange channel 11331, the heat exchange capacity of the corresponding main heat exchange channel 11331 can be adjusted according to the heat exchange requirements of the battery cell group 1111. For example, by adjusting the flow rate, velocity, pressure, and other data of the refrigerant in the corresponding main heat exchange channel 11331, each battery cell group 1111 can be cooled or heated appropriately, allowing each battery cell group 1111 to operate within a better operating temperature range, thereby improving the performance and lifespan of the battery device 1100.

Furthermore, when a single battery cell group 1111 or its corresponding main heat exchange channel 11331 fails, it is less likely to affect the normal operation of other battery cell groups 1111. This enhances the fault tolerance of the battery device 1100. Even if some main heat exchange channels 11331 malfunction, the entire battery device 1100 can still maintain a certain level of operational capability, improving the reliability and stability of the system and reducing the risk of the entire system being paralyzed due to a single point of failure.

Furthermore, each battery cell 1111 corresponds to one main heat exchange channel 11331, which enables more efficient heat exchange between the refrigerant and the battery cell 1111. When the refrigerant flows within the main heat exchange channel 11331, it can absorb or release heat from the battery cell 1111 more evenly, improving heat exchange efficiency and helping to better control the temperature uniformity of the battery cell 1111, thereby enhancing the performance of the entire battery device 1100.

In this embodiment, the number of battery cell groups 1111 is equal to the number of main heat exchange channels 11331, which can achieve balanced and stable heat exchange for each battery cell group 1111 in a targeted manner.

In some embodiments, as shown in FIG8, the battery cell group 1111 has a first length L1 in the first direction X, and each main heat exchange channel 11331 forms a heat exchange surface 1134 on the surface of the refrigerant heat exchange component 1130. The heat exchange surface 1134 has a second length L2 in the first direction X, and the ratio of the first length L1 to the second length L2 is in the range of 0.8-1.2.

Specifically, when the ratio of the first length L1 to the second length L2 is greater than or equal to 0.8 and less than 1, it can be seen that in the first direction X, the coverage area of the heat exchange surface 1134 extends beyond the edge of one or both ends of the battery cell assembly 1110, and the heat exchange surface 1134 is larger. It is understandable that the larger the heat exchange surface 1134, the more main heat exchange channels 11331 are available within the corresponding heat exchange zone 1133, allowing for a larger volume of refrigerant to flow within the main heat exchange channels 11331, thus improving the heat exchange capacity of the heat exchange surface 1134 and the refrigerant heat exchange component 1130.

For example, considering the thermal expansion of the battery cell 1112 during the charging and discharging process, when the first length L1 is less than the second length L2, the heat exchange surface 1134 can provide a certain space margin for the battery cell group 1111 during thermal expansion. After expansion, each battery cell group 1111 can also have sufficient heat exchange area with the heat exchange surface 1134 to improve the stability and reliability of heat exchange.

When the ratio of the first length L1 to the second length L2 is close to or equal to 1, it means that the length of the battery cell assembly 1111 in the first direction X is basically equal to the length of the heat exchange surface 1134. The heat exchange surface 1134 can cover the surface of the battery cell assembly 1110 to a greater extent and conduct more sufficient heat exchange with the battery cell assembly 1110, which is beneficial to reduce heat loss and improve heat exchange efficiency.

When the ratio of the first length L1 to the second length L2 is greater than 1 and less than or equal to 1.2, it can be seen that the battery cell assembly 1110 will cover the area outside the heat exchange surface 1134. For example, the surface on the refrigerant heat exchange component 1130 opposite to the battery cell 1112 is the first surface 1135, the heat exchange surface 1134 is located on the first surface 1135, the heat exchange surface 1134 corresponds to the heat exchange zone 1133, and one side of the heat exchange zone 1133 is the main current distribution and current collection zone 1132. That is to say, the battery cell assembly 1110 will extend to the first surface 1135 corresponding to the main current distribution and current collection zone 1132, thereby increasing the number of battery cells 1112 in the housing assembly 1120, which is beneficial to increasing the capacity of the battery device 1100.

Considering that the first surface 1135 has heat transfer properties, the area adjacent to the heat exchange surface 1134 will still have a certain heat exchange capacity. Furthermore, for the main branch current collection area 1132, the first main flow channel 11322 and the second main flow channel 11323 are distributed inside it. The first main flow channel 11322 and the second main flow channel 11323 circulate refrigerant, so that the main branch current collection area 1132 also has a certain heat exchange capacity, which can exchange heat for some battery cells 1112, thereby reducing energy waste and improving heat exchange efficiency.

In this embodiment, by controlling the relative lengths of the battery cell group 1111 and the heat exchange surface 1134 in the first direction X, the battery cells 1112 can be rationally arranged to reduce energy waste and improve heat exchange efficiency.

In some embodiments, referring to FIG13, the refrigerant heat exchange component 1130 has a heat exchange surface 1134 opposite to the battery cell assembly 1110, each main heat exchange channel 11331 is configured to be opposite to the heat exchange surface 1134, and the ratio of the area S1 of the projected area of each main heat exchange channel 11331 on the heat exchange surface 1134 to the area S2 of the heat exchange surface 1134 is greater than or equal to 0.4 and less than or equal to 0.8.

Specifically, the heat exchange surface 1134 should be understood as a part of the first surface 1135 of the refrigerant heat exchange component 1130, the first surface 1135 being the surface of the refrigerant heat exchange component 1130 opposite to the battery cell assembly 1110, and the heat exchange surface 1134 being the surface of the heat exchange zone 1133 opposite to the battery cell assembly 1110 and undergoing heat exchange.

For the refrigerant heat exchange component 1130 itself, the main heat exchange channel 11331 should be positioned opposite and matched with the heat exchange surface 1134. Since there are gaps between adjacent heat exchange sub-channels 11335 in the main heat exchange channel 11331, it can be known that the arrangement area of the main heat exchange channel 11331 (i.e., the area S1 of the projected area on the heat exchange surface 1134) will be smaller than the area S2 of the heat exchange surface 1134. However, if the arrangement area of the main heat exchange channel 11331 is too small, it will affect the heat exchange capacity and effect; if the arrangement area of the main heat exchange channel 11331 is too large, that is, the arrangement density of the main heat exchange channel 11331 is relatively large, the strength of the gap between two adjacent heat exchange sub-channels 11335 will be affected. Therefore, it is necessary to reasonably control the proportion of the main heat exchange channel 11331 in the heat exchange zone 1133.

Therefore, in this example, the ratio of the area S1 of the projected region of the main heat exchange channel 11331 on the heat exchange surface 1134 to the area S2 of the heat exchange surface 1134 is greater than or equal to 0.4 and less than or equal to 0.8. This ratio can be any value between 0.4 and 0.8, for example, 0.5, 0.6, 0.7, etc. This ratio of 0.4 to 0.8 makes the spacing between adjacent heat exchange sub-channels 11335 more reasonable, that is, the thickness of the channel wall is more reasonable, and the channel wall is less likely to be breached by the refrigerant.

In this embodiment, by reasonably controlling the proportion of the projected area of the main heat exchange channel 11331 on the heat exchange surface 1134, it is possible to ensure that there is sufficient heat exchange area between the refrigerant and the battery cell 1112, reduce the risk of the main heat exchange channel 11331 being too dense or too sparse, optimize the heat exchange effect, and facilitate the design and manufacture of the main heat exchange channel 11331.

In some embodiments, referring to Figures 5, 6 and 14-16, the refrigerant heat exchange component 1130 has a first surface 1135 and a second surface opposite to each other, the first surface 1135 or the second surface being disposed opposite to the battery cell assembly 1110; the refrigerant heat exchange component 1130 includes a plurality of mounting holes 1139, the plurality of mounting holes 1139 being disposed through and between the first surface 1135 and the second surface and avoiding the main heat exchange flow channel 11331.

Specifically, the first surface 1135 and the second surface are two opposing surfaces of the refrigerant heat exchange component 1130. The battery cell assembly 1110 can be arranged opposite to the first surface 1135, and the heat exchange surface 1134 is a part of the first surface 1135.

The main function of the mounting hole 1139 is to facilitate a stable connection between the refrigerant heat exchange component 1130 and other structures within the battery device 1100. For example, by inserting bolts, rivets, or other connectors through the mounting hole 1139, the refrigerant heat exchange component 1130 can be installed at a specific position on the housing assembly 1120 or the vehicle 1000, thereby fixing the refrigerant heat exchange component 1130 and reducing vibration and displacement of the refrigerant heat exchange component 1130 during the operation of the battery device 1100.

The mounting hole 1139 can be a through-hole structure, forming a connecting hole that passes through the first surface 1135 and the second surface. The mounting hole 1139 can be arranged in the heat exchange zone 1133. For example, the mounting hole 1139 can be arranged in the middle region of the heat exchange zone 1133 in the first direction X. The mounting hole 1139 can be located between two heat exchange sub-channels 11335 and is not connected to the heat exchange sub-channels 11335. For example, the heat exchange sub-channels 11335 can refer to the upstream sub-channel 11338 or the downstream sub-channel 11339. The mounting hole 1139 can be located between two upstream sub-channels 11338, or between two downstream sub-channels 11339, or between one upstream sub-channel 11338 and one downstream sub-channel 11339.

The diameter of the mounting hole 1139 can be larger than the spacing between two adjacent heat exchanger channels 11335. Therefore, the heat exchanger channel 11335 can be bent at the position opposite to the mounting hole 1139. That is to say, at the position opposite to the mounting hole 1139, the heat exchanger channel 11335 will be bent, for example, in a semi-circular bent shape.

In this embodiment, by providing mounting holes 1139, it is convenient to connect and fix the refrigerant heat exchange component 1130 to other components using bolts or other locking devices, thereby improving the ease of connection between the refrigerant heat exchange component 1130 and other components.

In some embodiments, referring to Figures 5, 6 and 14-16, a plurality of mounting holes 1139 are arranged in the central region of the refrigerant heat exchange component 1130 along the first direction X and spaced apart along the second direction Y; and/or, along the second direction Y, a plurality of mounting holes 1139 are arranged in the central region of the refrigerant heat exchange component 1130 and spaced apart along the first direction X.

Specifically, in the first direction X, the mounting holes 1139 are arranged in the central area of the refrigerant heat exchange component 1130, which helps to distribute the force on the refrigerant heat exchange component 1130 more evenly during installation and fixing. When the refrigerant heat exchange component 1130 is connected and fixed to other components through these mounting holes 1139, since the mounting points are located in the middle, it can effectively reduce the deformation or damage of components caused by uneven force, which is beneficial to improving the mechanical stability of the refrigerant heat exchange component 1130.

Since the heat exchange sub-channels 11335 around the mounting hole 1139 need to form a curved structure for avoidance, in order to improve the structural consistency among multiple main heat exchange channels 11331, the mounting hole 1139 can be set between two adjacent main heat exchange channels 11331, and a curved structure can be formed on each main heat exchange channel 11331, so that the structural form of each main heat exchange channel 11331 is consistent, which is conducive to improving the consistency of refrigerant flow in each main heat exchange channel 11331, thereby improving the temperature uniformity of the heat exchange surface 1134.

In the second direction Y, multiple mounting holes 1139 can be configured on a straight line parallel to the second direction Y to improve the regularity of the structural layout.

Optionally, in the second direction Y, the refrigerant heat exchange component 1130 has a central region, and along the second direction Y, a plurality of mounting holes 1139 are arranged in the central region of the refrigerant heat exchange component 1130 and spaced apart along the first direction X. In the first direction X, the plurality of mounting holes 1139 can be configured on a straight line parallel to the first direction X to improve the regularity of the structural layout.

Optionally, mounting holes 1139 are arranged in both the first direction X and the second direction Y, and the multiple mounting holes 1139 are arranged in a cross shape in the central area of the refrigerant heat exchange component 1130.

In this embodiment, the multiple mounting holes 1139 are arranged in the middle of the refrigerant heat exchange component 1130 and are evenly distributed at intervals, which helps to improve the balance of force on the refrigerant heat exchange component 1130 and makes the layout between the main heat exchange channel 11331 and the mounting holes 1139 more regular.

In some embodiments, as shown in Figures 14 and 15, the spacing L3 between two adjacent mounting holes 1139 ranges from 300mm to 1000mm; and/or, the outer diameter L4 of the mounting hole 1139 is 30mm to 60mm.

Specifically, the distance L3 between two adjacent mounting holes 1139 should be understood as the distance between the centers of the two mounting holes 1139 (for circular holes, the center is called the center of the circle). The distance L3 between two adjacent mounting holes 1139 can be any value between 300mm and 1000mm.

With a spacing of nearly 300mm, it can be seen that the arrangement of mounting holes 1139 is relatively dense. The smaller spacing allows the refrigerant heat exchange component 1130 to obtain denser support at the mounting point, which can better withstand the pressure and tension applied by components such as battery packs, reduce the deformation of components due to stress during use, and improve the stability of the entire structure.

With a spacing of approximately 1000 mm, the arrangement of mounting holes 1139 is relatively sparse. A larger spacing would result in a relatively greater force on each mounting point. Therefore, with a larger spacing, the refrigerant heat exchange component 1130 should have greater strength and rigidity to reduce the risk of stress concentration and deformation. Although the stress on the mounting holes 1139 increases, a smaller number of mounting holes 1139 can reduce damage to the refrigerant pipe heat exchange components and simplify the structural design. The impact on the rigidity and strength of the refrigerant components is minimal. Therefore, the number of mounting holes 1139 can be rationally arranged based on the structural strength of the refrigerant heat exchange component 1130 itself.

The outer diameter L4 of the mounting hole 1139 is set to 30mm-60mm. A smaller mounting hole 1139 occupies less space on the surface of the refrigerant heat exchange component 1130, which helps maintain the integrity of the heat exchange surface 1134 and reduces the impact on heat exchange. A larger outer diameter mounting hole 1139 can accommodate larger connectors and withstand greater tensile, compressive, and shear forces, which helps improve connection stability.

In this embodiment, considering that the arrangement of the mounting holes 1139 affects the strength and rigidity of the refrigerant heat exchange component 1130 itself and will affect the connection stability, the spacing of the mounting holes 1139 is controlled between 300mm and 1000mm and the outer diameter of the mounting holes 1139 is controlled between 30mm and 60mm, so that the rigidity, strength and other properties of the refrigerant heat exchange component 1130 can be further balanced with the connection stability.

In some embodiments, as shown in FIG17, the spacing L5 between each mounting hole 1139 and the main heat exchange channel 11331 is greater than 5 mm.

Specifically, the interval distance should be understood as the distance between the wall of the mounting hole 1139 and the wall of the main heat exchange channel 11331. In other words, the wall thickness of the main heat exchange channel 11331 near the mounting hole 1139 can be considered as the thickness of the weak point on the wall of the main heat exchange channel 11331.

Because the refrigerant exerts a compressive force on the flow channel wall of the main heat exchange channel 11331, and there is pressure inside the main heat exchange channel 11331, in order to prevent the weak points close to the mounting holes 1139 and the main heat exchange channel 11331 from being easily damaged, it is necessary to control the interval distance L5 between each mounting hole 1139 and the main heat exchange channel 11331 to be greater than 5mm, so as to improve the reliability of the main heat exchange channel 11331 in bearing.

In this embodiment, controlling the interval L5 between each mounting hole 1139 and the main heat exchange channel 11331 to be greater than 5mm can reduce the risk of the main heat exchange channel 11331 being destroyed.

In some embodiments, as shown in FIG5, the refrigerant heat exchange component 1130 further has a plurality of cavities 1138 inside, and each cavity 1138 is configured to avoid each other from the main heat exchange flow channel 11331.

Cavity 1138 can be understood as the hollow space inside the refrigerant heat exchange component 1130. For example, during the manufacturing process of the refrigerant heat exchange component 1130, the refrigerant heat exchange component 1130 includes an upper plate and a lower plate, which are welded together. During welding, a large amount of gas is generated. If this gas cannot be discharged in time, defects such as pores will form in the weld, reducing the welding quality and the sealing performance of the weld. As a structural cavity, cavity 1138 provides a discharge channel for the gas generated during welding, allowing the gas to escape smoothly, reducing welding defects caused by gas accumulation, thereby ensuring the quality and reliability of the welding, improving the sealing performance of the refrigerant heat exchange component 1130, and reducing the risk of refrigerant leakage.

Furthermore, by adding multiple cavities 1138 within the space outside the main heat exchange channel 11331, the overall structural strength of the refrigerant heat exchange component 1130 can be improved. The presence of the cavities 1138 alters the overall structure of the refrigerant heat exchange component 1130, giving it better mechanical properties. From a mechanical perspective, the cavities 1138 can serve as a reinforcing structure, effectively improving the bending and compressive strength of the refrigerant heat exchange component 1130. When the refrigerant heat exchange component 1130 is subjected to external forces, the cavities 1138 can disperse stress, reducing stress concentration and enabling the refrigerant heat exchange component 1130 to withstand greater external forces without deformation or damage. This improves the stability and reliability of the entire battery device 1100 and extends its service life.

Multiple cavities 1138 are disposed at one or both ends of the refrigerant heat exchange component 1130 along the first direction X.

In this embodiment, by setting multiple cavities 1138, the flow can be guided and the air can be vented during the welding process, which is beneficial to improving the welding quality and welding sealing, and also beneficial to improving the overall structural strength of the refrigerant heat exchange component 1130.

In some embodiments, as shown in FIG2, the housing assembly 1120 includes a housing body 1121 having a receiving cavity 1124, and a refrigerant heat exchange component 1130 is connected to the housing body 1121 and housed in the receiving cavity 1124; the refrigerant heat exchange component 1130 is disposed opposite to the battery cell assembly 1110.

Specifically, the box body 1121 may include a cover 1122, a box frame 1123, and a box bottom plate 1125. The cover 1122 and the box frame 1123 cover each other, and an opening is formed on the side of the box frame 1123 opposite to the cover 1122. It can be understood that the cover 1122 and the box frame 1123 are connected to form a groove structure with an opening. The box bottom plate 1125 is opposite to the cover 1122 and covers the opening. The cover 1122, the box frame 1123, and the box bottom plate 1125 together define a receiving cavity 1124 for accommodating the battery cell assembly 1110. The lid 1122 and the bottom plate 1125 can both be plate-like structures. The frame 1123 can be a hollow structure with openings at both ends. For example, the frame 1123 can be an annular frame structure. The lid 1122 covers one open side of the frame 1123, and the bottom plate 1125 is connected to the other open side (i.e., the open end) of the frame 1123. The lid 1122 can be positioned opposite to the bottom plate 1125. The body 1121 can be of various shapes, such as a cylinder or a cuboid.

The refrigerant heat exchange component 1130 can be connected to the housing body 1121 and housed in the housing cavity 1124 so as to face the bottom plate 1125. The battery cell assembly 1110 is opposite to the refrigerant heat exchange component 1130, so that it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110.

In this embodiment, the refrigerant heat exchange component 1130 can be housed in the receiving cavity 1124 and disposed opposite to the battery cell assembly 1110, so that it can exchange heat with the battery cell assembly 1110 while also supporting the battery cell assembly 1110.

In some embodiments, as shown in FIG3, the housing assembly 1120 includes a housing body 1121 with an open opening, and a refrigerant heat exchange component 1130 connected to the housing body 1121 and covering the open opening to form a receiving cavity 1124; the refrigerant heat exchange component 1130 is disposed opposite to the battery cell assembly 1110.

Specifically, the housing body 1121 may include a cover 1122 and a frame 1123, which cover each other. An open opening is formed on the side of the frame 1123 opposite to the cover 1122. This can be understood as the cover 1122 and the frame 1123 being connected to form a groove structure with an open opening. The cover 1122, the frame 1123, and the refrigerant heat exchange component 1130 together define a receiving cavity 1124 for accommodating the battery cell assembly 1110. The cover 1122 may be a plate-like structure, and the frame 1123 may be a hollow structure with openings at both ends. For example, the frame 1123 may be an annular frame structure. The cover 1122 covers one open side of the frame 1123, and the refrigerant heat exchange component 1130 is connected to the other open side (i.e., the open opening) of the frame 1123. The cover 1122 may be disposed opposite to the refrigerant heat exchange component 1130. The box body 1121 can be of various shapes, such as cylinder, cuboid, etc.

The refrigerant heat exchange component 1130 can be connected to the housing body 1121. The refrigerant heat exchange component 1130 can form the bottom plate 1125 of the housing opposite to the battery cell assembly 1110. In this way, it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110. This helps to simplify the structure of the external housing body 1121 and reduce the weight of the battery device 1100.

In this embodiment, the refrigerant heat exchange component 1130 can be connected to the box body 1121. The refrigerant heat exchange component 1130 can form the bottom plate of the box, so that it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110. This helps to simplify the structure of the external box body 1121 and reduce the weight of the battery device 1100.

In some embodiments, the main heat exchange channel 11331 is filled with a phase change medium.

Specifically, a phase change medium is a substance capable of undergoing a phase change at a specific temperature, absorbing or releasing a large amount of latent heat during the phase change process. In this example, a phase change medium is used as the heat exchange medium. When the battery cell assembly 1110 generates a large amount of heat during charging and discharging, the phase change medium in the main heat exchange channel 11331 absorbs the heat and undergoes a phase change, slowing down the rapid temperature rise of the battery device 1100. When the temperature of the battery device 1100 decreases, the phase change medium releases heat, mitigating the impact of excessively low battery temperature on performance. Using a phase change medium as the heat exchange medium helps maintain a relatively stable temperature for the battery device 1100, reducing problems such as capacity decay and shortened lifespan due to excessively high temperatures, or increased internal resistance and reduced charging and discharging efficiency due to excessively low temperatures, thereby improving the overall performance, reliability, and stability of the battery device 1100.

It should be noted that the phase change medium and the refrigerant can work together. For example, in a large-scale battery energy storage system, the refrigerant is responsible for transferring the heat generated by the battery cell module 1110 from the battery module to the heat dissipation end of the entire thermal management system, while the phase change medium is placed inside the battery module. When the battery cell module 1110 generates a large amount of heat in a short period of time, the phase change medium quickly absorbs the heat and undergoes a phase change, mitigating the rapid temperature rise and buying time for the refrigerant to further dissipate heat. The two work together to improve the efficiency and stability of the thermal management system.

In this embodiment, filling the main heat exchange channel 11331 with a phase change medium is beneficial to improving heat exchange efficiency and enhancing the performance stability of the battery device 1100.

In some embodiments, the refrigerant heat exchange component 1130 is formed from one or more of metals and non-metals.

Specifically, metallic materials, such as copper and aluminum, possess excellent thermal conductivity, enabling rapid heat transfer and allowing the refrigerant heat exchange component 1130 to efficiently dissipate the heat generated by the battery cell assembly 1110. Non-metallic materials, like ceramics, offer unique thermal performance advantages; for example, some ceramic materials exhibit high-temperature resistance, maintaining stable thermal conductivity even under high-temperature environments. Combining metallic and non-metallic materials fully leverages their respective thermal conductivity advantages, ensuring the refrigerant heat exchange component 1130 maintains high-efficiency thermal conductivity across different operating temperature ranges and heat load conditions, thereby enhancing the overall performance of the battery thermal management system.

In this embodiment, the material selection of the refrigerant heat exchange component 1130 is more flexible and varied, and it can be flexibly combined and prepared according to the heat exchange requirements of the battery device 1100, so that the refrigerant heat exchange component 1130 can maintain efficient heat conduction capability and improve the overall performance of the battery thermal management system.

In some embodiments, as shown in FIG4, the battery device 1100 further includes a connector component 1140, which is connected to the refrigerant heat exchange component 1130 and is correspondingly connected to the first flow channel 11311 and the second flow channel 11312 of the inlet and outlet area 1131.

Specifically, the connector component 1140 has a flow channel inlet and a flow channel outlet. The refrigerant flow channels within the inlet/outlet area 1131 include multiple first flow channels 11311 and multiple second flow channels 11312. The flow channel inlet is connected to each of the first flow channels 11311, and the flow channel outlet is connected to each of the second flow channels 11312. The connector component 1140 can be connected to the refrigerant heat exchange component 1130 by welding, or it can be connected to the refrigerant heat exchange component 1130 by fasteners or other components. The connector component 1140 can be located on the upper part of the first surface 1135 and near the edge.

In this embodiment, by providing the connector component 1140, it is easy to connect to an external pipeline used to transport the heat exchange medium (i.e., refrigerant), thereby improving the ease of assembly.

According to some embodiments of this application, referring to FIG4, this application also provides a refrigerant heat exchange device, which includes the refrigerant heat exchange component 1130 in the battery device 1100 in any of the above embodiments.

The example of the refrigerant heat exchange device in this application is based on the example of the battery device 1100 described above. The structure of the refrigerant heat exchange component 1130 in the example of the battery device 1100 is the same as that of the refrigerant heat exchange component 1130 in this example, and the technical effects are the same. It will not be described again here. For details, please refer to the description of the battery device 1100 described above.

According to some embodiments of this application, this application also provides an energy storage device, which includes a power conversion device and the energy storage device in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

Specifically, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 1100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via piping to regulate the temperature of the individual battery cells.

As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

As an example, the master control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The master control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the master control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and an energy storage device as described in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

In some embodiments, the energy storage system may include one or more energy storage devices and a power converter system (PCS), the power converter being connected between the power generation equipment and the energy storage devices. The power generation equipment generates electrical energy, which can be stored in the energy storage devices via the power converter. As examples, the power generation equipment may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of power generation equipment is not limited in this application.

According to some embodiments of this application, referring to FIG1, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery unit 1100 in the energy storage devices via cables. The battery unit 1100 can provide its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000) to replenish their power.

Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

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 (19)

A battery device (1100), characterized in that it comprises: The housing assembly (1120) has a receiving cavity (1124); A battery cell assembly (1110) is disposed within the receiving cavity (1124); the battery cell assembly (1110) includes multiple rows of battery cell groups (1111), each row of battery cell groups (1111) includes multiple battery cells (1112) stacked in a first direction (X), and the multiple rows of battery cell groups (1111) are arranged side by side in a second direction (Y); A refrigerant heat exchange component (1130) has a heat exchange surface (1134) configured to exchange heat with the battery cell assembly (1110); the refrigerant heat exchange component (1130) includes a plurality of main heat exchange channels (11331), which are arranged in parallel in the second direction (Y); each main heat exchange channel (11331) includes a main branch node (11332), a main confluence node (11334), and a main... The main flow channel section (11333) is connected between the main branch node section (11332) and the main confluence node section (11334); each of the main flow channel sections (11333) includes a plurality of parallel heat exchange sub-flow channels (11335); the projection area of each column of battery cell group (1111) on the heat exchange surface (1134) covers at least one of the main heat exchange flow channels (11331); the second direction (Y) is perpendicular to the first direction (X). The battery device (1100) as claimed in claim 1 is characterized in that each of the heat exchange sub-channels (11335) extends along the first direction (X) and is spaced apart in the second direction (Y). The battery device (1100) as claimed in claim 1 is characterized in that, along the first direction (X), the main shunt node (11332) and the main bus node (11334) are both located at the same end of the main flow channel (11333). The battery device (1100) according to any one of claims 1-3 is characterized in that the refrigerant heat exchange component (1130) includes a main branching and collecting area (1132) and a heat exchange area (1133), the main heat exchange channel (11331) is distributed in the heat exchange area (1133), the main branching and collecting area (1132) includes a plurality of trunk channels (11321), some of the trunk channels (11321) are respectively connected to the main branching node (11332), and another part of the trunk channels (11321) are respectively connected to the main confluence node (11334), the number of trunk channels (11321) is less than or equal to the sum of the number of the main branching node (11332) and the main confluence node (11334). The battery device (1100) as claimed in claim 4 is characterized in that the plurality of main flow channels (11321) are divided into a plurality of first main flow channels (11322) and a plurality of second main flow channels (11323), each of the main flow channel sections (11333) includes an upstream flow channel (11336) and a downstream flow channel (11337), the first main flow channels (11322), the main branch node section (11332), the upstream flow channel (11336), the downstream flow channel (11337), the main confluence node section (11334) and the second main flow channels (11323) are sequentially connected, and the number of the first main flow channels (11322) is less than or equal to the sum of the number of the main branch node sections (11332). The battery device (1100) as claimed in claim 4 is characterized in that the plurality of main flow channels (11321) are divided into a plurality of first main flow channels (11322) and a plurality of second main flow channels (11323), each of the main flow channel portions (11333) includes an upstream flow channel (11336) and a downstream flow channel (11337), the first main flow channels (11322), the main branch node portion (11332), the upstream flow channel (11336), the downstream flow channel (11337), the main confluence node portion (11334) and the second main flow channels (11323) are sequentially connected, and the number of second main flow channels (11323) is less than or equal to the sum of the number of main confluence node portions (11334). The battery device (1100) according to any one of claims 1-3 is characterized in that each of the main flow channels (11333) includes an upstream flow channel (11336) and a downstream flow channel (11337), the upstream flow channel (11336) includes a plurality of upstream sub-flow channels (11338) that are all connected to the downstream flow channel (11337), the plurality of upstream sub-flow channels (11338) extend along the first direction (X) and are arranged opposite to each other and spaced apart in the second direction (Y), each of the upstream sub-flow channels (11338) is connected to the main branch node (11332); the downstream flow channel (11337) is connected to the main confluence node (11334). The battery device (1100) according to any one of claims 1-3 is characterized in that each of the main flow channels (11333) includes an upstream flow channel (11336) and a downstream flow channel (11337), the downstream flow channel (11337) includes a plurality of downstream sub-flow channels (11339) that are all connected to the upstream flow channel (11336), the plurality of downstream sub-flow channels (11339) extend along the first direction (X) and are arranged opposite to each other and spaced apart in the second direction (Y), each of the downstream sub-flow channels (11339) is connected to the main confluence node (11334); the upstream flow channel (11336) is connected to the main branch node (11332). The battery device (1100) according to any one of claims 1-3 is characterized in that each of the main flow channel sections (11333) includes an upstream flow channel (11336) and a downstream flow channel (11337), the upstream flow channel (11336) in some of the main flow channel sections (11333) is arranged adjacent to the upstream flow channel (11336) in the adjacent main flow channel section (11333), and the downstream flow channel (11337) in some of the main flow channel sections (11333) is arranged adjacent to the downstream flow channel (11337) in the adjacent main flow channel section (11333). The battery device (1100) as claimed in claim 4 is characterized in that the refrigerant heat exchange component (1130) further includes an inlet/outlet area (1131), the inlet/outlet area (1131) includes a first flow channel (11311) and a second flow channel (11312), the flow direction of the refrigerant in the first flow channel (11311) is opposite to the flow direction of the refrigerant in the second flow channel (11312); a plurality of the main heat exchange channels (11331) are symmetrically arranged on both sides of a symmetry axis parallel to the first direction (X), and the inlet/outlet area (1131) is arranged at one end of the symmetry axis; the first flow channel (11311) and the second flow channel (11312) are both connected to the main flow channel (11321). The battery device (1100) according to any one of claims 1-3 is characterized in that the number of battery cell groups (1111) is equal to the number of main heat exchange channels (11331). The battery device (1100) according to any one of claims 1-3 is characterized in that the battery cell group (1111) has a first length (L1) in the first direction (X), each of the main heat exchange channels (11331) forms a heat exchange surface (1134) on the surface of the refrigerant heat exchange component (1130), the heat exchange surface (1134) has a second length (L2) in the first direction (X), and the ratio of the first length (L1) to the second length (L2) is in the range of 0.8-1.2. The battery device (1100) according to any one of claims 1-3 is characterized in that the refrigerant heat exchange component (1130) has a heat exchange surface (1134) opposite to the battery cell assembly (1110), each of the main heat exchange channels (11331) is configured to be opposite to the heat exchange surface (1134), and the ratio of the area of the projected area of each of the main heat exchange channels (11331) on the heat exchange surface (1134) to the area of the heat exchange surface (1134) is greater than or equal to 0.4 and less than or equal to 0.8. The battery device (1100) according to any one of claims 1-3 is characterized in that the refrigerant heat exchange component (1130) has a first surface (1135) and a second surface opposite to each other, the first surface (1135) being disposed opposite to the battery cell assembly (1110); the refrigerant heat exchange component (1130) includes a plurality of mounting holes (1139), the plurality of mounting holes (1139) being disposed through between the first surface (1135) and the second surface and avoiding the main heat exchange channel (11331). The battery device (1100) as claimed in claim 14 is characterized in that, along the first direction (X), a plurality of mounting holes (1139) are arranged in the central region of the refrigerant heat exchange component (1130) and spaced apart along the second direction (Y); and/or, along the second direction (Y), a plurality of mounting holes (1139) are arranged in the central region of the refrigerant heat exchange component (1130) and spaced apart along the first direction (X). The battery device (1100) as claimed in claim 15 is characterized in that the spacing between two adjacent mounting holes (1139) is in the range of 300mm-1000mm; and/or The outer diameter of the mounting hole (1139) is 30mm-60mm. The battery device (1100) according to any one of claims 1-3 is characterized in that the interior of the refrigerant heat exchange component (1130) further comprises a plurality of cavities (1138), each of the cavities (1138) being configured to avoid contact with the main heat exchange channel (11331). A refrigerant heat exchange device, characterized in that the refrigerant heat exchange device includes the refrigerant heat exchange component (1130) in the battery device (1100) as described in any one of claims 1-17. An electrical device, characterized in that it includes a battery device as described in any one of claims 1-17, the battery device being used to store or provide electrical energy.