Battery device and electric device

Abstract

A battery device (100) and an electric device (1000). The battery device (100) comprises: a case (110), a battery cell (120), and separation assemblies (130). The battery cell (120) is disposed in the case (110), and the battery cell (120) comprises a casing (121) and an electrode terminal (122). The separation assemblies (130) are disposed in the case (110) and connected to the case (110) and the casing (121), so as to separate a flow channel space (140) from an electrical space in the case (110). The flow channel space (140) is isolated from the electrical space, the electrode terminal (122) is located in the electrical space, the casing (121) is at least partially located in the flow channel space (140), and a heat exchange medium is in contact with a portion of the casing (121) located in the flow channel space (140).

Description

Battery devices and electrical appliances Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the battery device, as the power source, plays an irreplaceable and crucial role. Considering that the battery device generates a significant amount of heat during operation, liquid cooling is typically used to dissipate heat from the battery.

[0003] In related technologies, poor sealing of the coolant flow channels inside the battery device leads to easy leakage of coolant from the flow channels, affecting the service life and safety of the battery device.

[0004] Application content

[0005] This application aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, in a first aspect, embodiments of this application provide a battery device that has good safety in use and a long service life.

[0007] Secondly, this application further proposes an electrical device.

[0008] A battery device according to an embodiment of this application includes: a housing, a battery cell, and a separator assembly. The battery cell is disposed within the housing and includes a casing and electrode terminals exposed in the casing. The separator assembly is disposed within the housing and connected to the housing and the casing to separate a flow channel space and an electrical space within the housing. The flow channel space and the electrical space are isolated from each other. The electrode terminals are located within the electrical space. The casing is at least partially located within the flow channel space. The flow channel space is used for the flow of a heat exchange medium, and the heat exchange medium is in contact with the portion of the casing located within the flow channel space.

[0009] Therefore, by setting a partition component inside the housing to separate the flow channel space for the heat exchange medium, the partition component helps to improve the sealing performance of the flow channel space, reduce the risk of heat exchange medium leakage in the flow channel space, and thus help to improve the electrical performance and safety of the battery device. By further placing the electrode terminals in the electrical space, it helps to improve the convenience of electrical connection of the electrode terminals, and further helps to prevent corrosion and damage to the electrode terminals caused by heat exchange medium leakage in the flow channel space, thus helping to improve the service life of the electrical device. At least part of the housing is located in the flow channel space to facilitate heat exchange between the heat exchange medium and the battery cells, which helps to improve the heat exchange effect of the battery cells.

[0010] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0011] Figure 1 is a simplified structural diagram of the electrical device described in an embodiment of this application;

[0012] Figure 2 is a schematic diagram of the battery device described in an embodiment of this application;

[0013] Figure 3 is a second structural schematic diagram of the battery device described in an embodiment of this application;

[0014] Figure 4 is a cross-sectional view of Figure 3 at point AA;

[0015] Figure 5 is an enlarged view of point C in Figure 4;

[0016] Figure 6 is a partial enlarged view of the end of Figure 4 in the first direction;

[0017] Figure 7 is an enlarged view of Figure 3 at point BB;

[0018] Figure 8 is a magnified view of a portion of the area in Figure 7;

[0019] Figure 9 is a schematic diagram of the assembly of the battery cell and the separator assembly according to an embodiment of this application;

[0020] Figure 10 is a schematic diagram of the assembly of the battery cell and the separator assembly according to an embodiment of this application;

[0021] Figure 11 is a schematic diagram of the assembly of the battery cell and the casing according to an embodiment of this application;

[0022] Figure 12 is a cross-sectional view of the battery device according to an embodiment of this application at the flow guiding component, wherein the flow guiding component includes two first flow guiding elements with the same structure;

[0023] Figure 13 is a magnified view of a portion of the area in Figure 12;

[0024] Figure 14 is a second cross-sectional view of the battery device described in the embodiment of this application at the flow guiding component, wherein the flow guiding component includes two first flow guiding elements with different structures;

[0025] Figure 15 is a magnified view of a portion of the area in Figure 14;

[0026] Figure 16 is a third cross-sectional view of the battery device according to an embodiment of this application at the flow guiding component, wherein the flow guiding component includes a second flow guiding member, a third flow guiding member, and a fourth flow guiding member;

[0027] Figure 17 is a magnified view of a portion of the area in Figure 16;

[0028] Figure 18 is a cross-sectional view four of the battery device according to an embodiment of this application at the flow guiding component, wherein the flow guiding component includes a fifth flow guiding element, a sixth flow guiding element, a seventh flow guiding element and an eighth flow guiding element;

[0029] Figure 19 is a magnified view of a portion of the area in Figure 18;

[0030] Figure 20 is a schematic diagram of the battery device described in an embodiment of this application.

[0031] Figure 21 is a schematic diagram of the structure of the battery device described in the embodiment of this application;

[0032] Figure 22 is a cross-sectional view of Figure 21 at point DD;

[0033] Figure 23 is a second sectional view of Figure 21 at point DD;

[0034] Figure 24 is a cross-sectional view of Figure 21 at EE;

[0035] Figure 25 is a magnified view of a portion of the area in Figure 24;

[0036] Figure 26 is a schematic diagram of the battery device described in an embodiment of this application;

[0037] Figure 27 is a cross-sectional view of Figure 26 at FF;

[0038] Figure 28 is a schematic diagram of the structure of the battery device described in the embodiment of this application;

[0039] Figure 29 is a structural schematic diagram of the box described in an embodiment of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0042] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0046] In this application, "multiple" means two or more (including two).

[0047] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0048] The battery device mentioned in the embodiments of this application refers to a single physical module comprising multiple battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application can be a battery module or a battery pack. A battery module generally includes multiple battery cells. A battery device generally includes a housing for encapsulating multiple battery cells or multiple battery modules, the housing preventing liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0049] A single battery cell typically includes a casing, a cell assembly, and an electrolyte. The casing houses the cell assembly and the electrolyte, and has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode plates, negative electrode plates, and separators.

[0050] The positive electrode typically includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as the positive electrode tab. Multiple positive electrode tabs are stacked together and electrically connected to the positive electrode post. The stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a positive electrode adapter piece. The stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0051] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. The multiple stacked negative electrode tabs can be directly soldered to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece. The multiple stacked negative electrode tabs are soldered to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is soldered to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited, and it can be, for example, polypropylene or polyethylene.

[0052] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the battery device, as the power source, plays an irreplaceable and crucial role. Considering that the battery device generates a significant amount of heat during operation, liquid cooling is typically used to dissipate heat from the battery.

[0053] In related technologies, poor sealing of the coolant flow channels inside the battery device leads to easy leakage of coolant from the flow channels, affecting the service life and safety of the battery device.

[0054] Based on the above considerations, in order to reduce the risk of coolant leakage, a battery device is proposed. The battery device includes a housing, battery cells, and a separator assembly. The battery cells are disposed in the housing and include a casing and electrode terminals exposed in the casing. The separator assembly is disposed in the housing and connected to the housing and the casing to separate a flow channel space and an electrical space within the housing. The flow channel space and the electrical space are isolated from each other. The electrode terminals are located in the electrical space. At least a portion of the casing is located in the flow channel space. The flow channel space is used for the flow of heat exchange medium, and the heat exchange medium is in contact with the portion of the casing located in the flow channel space.

[0055] In the above technical solution, by setting a partition component inside the housing to separate the flow channel space for the heat exchange medium, the partition component helps to improve the sealing performance of the flow channel space and reduce the risk of heat exchange medium leakage in the flow channel space, thereby improving the electrical performance and safety of the battery device. By further placing the electrode terminals in the electrical space, it helps to improve the convenience of electrical connection of the electrode terminals and further prevents corrosion and damage to the electrode terminals caused by heat exchange medium leakage in the flow channel space, thereby improving the service life of the electrical device. At least part of the housing is located in the flow channel space to facilitate heat exchange between the heat exchange medium and the battery cells, which helps to improve the heat exchange effect of the battery cells.

[0056] This application provides an electrical device that uses the battery disclosed herein as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0057] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical device and battery device of this application in detail.

[0058] Please refer to Figure 1, which is a schematic diagram of the structure of an electrical device 1000 provided in some embodiments of this application as a vehicle. The vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. The vehicle is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source.

[0059] The vehicle may also include a controller and a motor. The controller controls the battery device 100 to supply power to the motor, for example, to meet the power requirements for vehicle starting, navigation, and driving. In some embodiments of this application, the battery device 100 can serve not only as the vehicle's operating power source but also as the vehicle's drive power source, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0060] Referring to Figures 2, 3, 4, and 9, in some embodiments of this application, the battery device 100 includes a housing 110, a battery cell 120, and a separator assembly 130. The battery cell 120 is disposed within the housing 110 and includes a housing 121 and electrode terminals 122 exposed outside the housing 121. The separator assembly 130 is disposed within the housing 110 and connected to the housing 110 and the housing 121 to separate a flow channel space 140 and an electrical space within the housing 110. The flow channel space 140 and the electrical space are isolated from each other. The electrode terminals 122 are located within the electrical space. The housing 121 is at least partially located within the flow channel space 140, which is used for the flow of a heat exchange medium. The heat exchange medium is in contact with the portion of the housing 121 located within the flow channel space 140.

[0061] In the above technical solution, by setting a partition component 130 inside the housing 110 to define the flow channel space 140 for the flow of heat exchange medium, the partition component 130 helps to improve the sealing performance of the flow channel space 140 and reduce the risk of heat exchange medium leakage in the flow channel space 140, thereby improving the electrical performance and safety of the battery device 100. By further setting the electrode terminals 122 in an electrical space isolated from the flow channel space 140, the risk of corrosion and damage to the electrode terminals 122 caused by heat exchange medium leakage in the flow channel space 140 is further reduced, thereby improving the service life of the electrical device 1000. At least a portion of the housing 121 is located inside the flow channel space 140 to facilitate heat exchange between the heat exchange medium and the battery cell 120, thereby improving the heat exchange effect of the battery cell 120.

[0062] Referring to Figures 2 and 3, the housing 110 can serve as a mounting carrier for the battery cell 120, allowing the battery cell 120 to be assembled inside the housing 110. This facilitates the positioning and installation of the battery cell 120. Furthermore, the housing 110 can protect the battery cell 120, reducing the risk of damage to the battery cell 120 and thus improving the service life of the battery device 100. The electrode terminals 122 of the battery cell 120 extend from and are exposed outside the housing 121 of the battery cell 120, facilitating electrical connection between the electrode terminals 122 and an external circuit.

[0063] Referring further to Figures 3, 4, and 9, the separator 130 is connected to the housing 110 and the shell 121 to facilitate the assembly of the separator 130 and to ensure that at least a portion of the shell 121 is located within the flow channel space 140 defined by the separator 130. The housing 110 is provided with an inlet and an outlet, and the flow channel space 140 is connected to the inlet and outlet on the housing 110. The heat exchange medium can enter the flow channel space 140 through the inlet and come into contact with the shell 121 located in the flow channel space 140 to exchange heat with the battery cell 120, which is beneficial to improving the heat exchange efficiency of the battery cell 120. The heat exchange medium after heat exchange can be discharged through the outlet. The flow channel space 140 separated by the separator 130 has good sealing performance, which is beneficial to reducing the risk of leakage of the heat exchange medium from the flow channel space 140 and improving the safety of the electrical device 1000.

[0064] Considering the risk of short circuit that may occur when the electrode terminal 122 comes into contact with the heat exchange medium, arranging the electrode terminal 122 in an electrical space that is isolated from the flow channel space 140 helps to reduce the risk of corrosion and damage to the electrode terminal 122 caused by contact between the heat exchange medium and the electrode terminal 122, thereby improving the service life of the battery device 100 and the stability of its operation.

[0065] The heat exchange medium can be ethylene glycol, synthetic hydrocarbons, synthetic esters, or silicone oil, etc. The specific type of heat exchange medium can be determined according to actual production requirements, and no specific limitation is made here.

[0066] In some examples, the side of the housing 121 away from the electrode terminal 122 may be exposed within the flow channel space 140, so that the electrode terminal 122 can be arranged outside the flow channel space 140; in other examples, the side surface of the housing 121 where the electrode terminal 122 is provided may be arranged outside the flow channel space 140, so that the electrode terminal 122 can be arranged outside the flow channel space 140, which also helps to increase the contact area between the battery cell 120 and the heat exchange medium, thereby improving the heat exchange effect of the battery cell 120.

[0067] It is understood that the specific portion of the housing 121 exposed within the flow channel space 140 can be determined based on the location of the partition component 130 and actual production requirements, and is not specifically limited here, as long as at least a portion of the housing 121 is exposed within the flow channel space 140 and the electrode terminal 122 is located within the electrical space.

[0068] Referring to Figures 3, 4 and 9, in some embodiments of this application, the housing 121 includes a plurality of sidewalls, at least two of which participate in forming the flow channel space 140.

[0069] In the above technical solution, by having at least two sidewalls of the housing 121 participate in forming the flow channel space 140, the flow channel space 140 can be processed, and there is no need to arrange other components in the housing 110 to define the flow channel space 140. This is beneficial to reducing the production cost of the battery device 100, and at the same time, it is beneficial to increase the contact area between the battery cell 120 and the heat exchange medium, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0070] Multiple sidewalls are interconnected to define a space for containing electrolyte. The multiple sidewalls can collectively define a rectangular shell 121. The two sidewalls with the largest area among the multiple sidewalls can participate in defining the flow channel space 140; or, the sidewall with the largest area among the multiple sidewalls and the two sidewalls connected to it can participate in defining the flow channel space 140; or, all of the multiple sidewalls can participate in defining the flow channel space 140.

[0071] It is understood that the above-described rectangular shell 121 is merely an example for the purpose of illustration and should not be construed as a limitation of this application. The shell 121 can also be constructed in other shapes. Furthermore, the number of sidewalls participating in defining the flow channel space 140 can be determined according to actual production requirements and is not specifically limited here.

[0072] Referring to Figures 3, 4 and 9, in some embodiments of this application, the housing 121 includes an adjacent first sidewall 1211 and a second sidewall 1212, the first sidewall 1211 being the sidewall with the largest area in the housing 121, and the first sidewall 1211 and / or the second sidewall 1212 participating in the formation of the flow channel space 140.

[0073] In the above technical solution, by having the first sidewall 1211 and / or the second sidewall 1212 participate in forming the flow channel space 140, the processing of the flow channel space 140 is facilitated, and there is no need to arrange other components for defining the flow channel space 140 in the housing 110. This is beneficial to reduce the production cost of the battery device 100, and at the same time, it is beneficial to increase the contact area between the battery cell 120 and the heat exchange medium, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0074] In some examples, the first sidewall 1211 participates in forming the flow channel space 140. Since the first sidewall 1211 is the sidewall with the largest area in the housing 121, the participation of the first sidewall 1211 in forming the flow channel space 140 is beneficial to increasing the contact area between the housing 121 and the heat exchange medium in the flow channel space 140, thereby improving the heat exchange effect of the battery cell 120.

[0075] In other examples, the second sidewall 1212 participates in forming the flow channel space 140. Since the area of ​​the second sidewall 1212 is smaller than that of the first sidewall 1211, the participation of the second sidewall 1212 in forming the flow channel space 140 helps to reduce the size of the flow channel space 140, facilitates the arrangement of the flow channel space 140 in a limited space, and helps to improve the heat exchange effect of the battery cell 120.

[0076] In some other examples, in conjunction with Figures 4 and 6, the first sidewall 1211 and the second sidewall 1212 simultaneously participate in forming the flow channel space 140 to further increase the contact area between the housing 121 and the heat exchange medium in the flow channel space 140, thereby helping to further improve the heat exchange effect of the battery cell 120.

[0077] Referring to Figures 4, 9 and 10, in some embodiments of this application, the housing 121 includes two first sidewalls 1211 and two second sidewalls 1212 disposed opposite to each other, the two first sidewalls 1211 and the two second sidewalls 1212 respectively participating in the formation of the flow channel space 140.

[0078] In the above technical solution, by having the two first sidewalls 1211 and the two second sidewalls 1212 respectively participate in forming the flow channel space 140, the processing of the flow channel space 140 is facilitated, and there is no need to arrange other components for defining the flow channel space 140 in the housing 110. This is beneficial to reducing the production cost of the battery device 100, and to further increasing the contact area between the battery cell 120 and the heat exchange medium, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0079] Referring to Figures 4, 9, and 10, the housing 121 can be formed as a cuboid. The first sidewall 1211 is the sidewall with the largest area of ​​the housing 121. The two opposing first sidewalls 1211 participate in forming the flow channel space 140. The two second sidewalls 1212 are respectively connected to the two sides of the first sidewall 1211 and can connect the two opposing first sidewalls 1211. The two first sidewalls 1211 and the two second sidewalls 1212 participate in forming the flow channel space 140. That is to say, all four sidewalls of the housing 121 extending in its circumferential direction participate in forming the flow channel space 140, so as to further increase the contact area between the housing 121 and the heat exchange medium, thereby improving the heat exchange effect of the battery cell 120.

[0080] It is understood that the above-described rectangular shell 121 is merely an example for the purpose of illustration and should not be construed as a limitation of this application. The shell 121 can also be constructed in other shapes, which are not specifically limited here.

[0081] Referring to Figures 2 to 4, in some embodiments of this application, there are multiple battery cells 120 spaced apart within the housing 110, and at least a portion of the flow channel space 140 is provided between adjacent battery cells 120.

[0082] In the above technical solution, by providing at least a portion of the flow channel space 140 between adjacent battery cells 120, the heat exchange medium flowing into the portion of the flow channel space 140 between the two adjacent battery cells 120 can exchange heat with the two battery cells 120 respectively. This is beneficial to make the heat exchange medium fully exert its heat exchange performance, improve the heat exchange effect of the heat exchange medium, and simplify the setting of the flow channel space 140, thereby improving the production and processing efficiency of the battery device 100.

[0083] Multiple battery cells 120 can be arranged in a straight line, array, or other shapes within the housing 110 according to actual production requirements, so that the arrangement of the battery cells 120 can adapt to different application needs. For example, multiple battery cells 120 can be arranged at intervals along a second direction, with the first sidewalls 1211 of two adjacent battery cells 120 along the second direction facing each other, and the first sidewall 1211 of each battery cell 120 participating in the formation of a flow channel space 140, so that a portion of the flow channel space 140 is provided between adjacent battery cells 120 along the second direction. After the heat exchange medium flows into the flow channel space 140, it can exchange heat with two adjacent battery cells 120 respectively. Multiple battery cells 120 can also be arranged at intervals along the first direction. The second sidewalls 1212 of two adjacent battery cells 120 along the first direction are arranged opposite each other, and the second sidewalls 1212 of each battery cell 120 participate in forming the flow channel space 140, so that a part of the flow channel space 140 can be formed between adjacent battery cells 120 along the second direction. After the heat exchange medium flows into the flow channel space 140, it can exchange heat with two adjacent battery cells 120 respectively.

[0084] It should be noted that "first direction" can be understood as the width direction of box 110, and "second direction" can be understood as the length direction of box 110. For a specific direction illustration, please refer to Figure 2.

[0085] Referring to Figures 4, 9 and 10, in some embodiments of this application, at least a portion of the separator 130 is located in the gap between adjacent battery cells 120.

[0086] In the above technical solution, by positioning at least a portion of the separator 130 in the gap between adjacent battery cells 120, a flow channel space 140 is defined between the separator 130 and the battery cells 120, and the separator 130 seals the gap between adjacent battery cells 120. This improves the sealing performance of the flow channel space 140, prevents leakage of the heat exchange medium in the flow channel space 140, and thus improves the safety and service life of the battery device 100.

[0087] The separator 130 can be connected to the two opposite sidewalls of two adjacent battery cells 120 respectively, so that the separator 130 and the two adjacent battery cells 120 can jointly form the flow channel space 140, which is beneficial to improving the sealing performance of the flow channel space 140; or each battery cell 120 and the side corresponding to the adjacent battery cell 120 are provided with a separator 130, and the separator 130s corresponding to two adjacent battery cells 120 are connected to seal the gap between the two adjacent battery cells 120 and form the flow channel space 140.

[0088] It is understandable that the specific structure and arrangement of the separator component 130 can be determined according to actual production requirements, and no specific limitations are made here.

[0089] Referring to Figures 4, 5, 9 and 10, in some embodiments of this application, at least a portion of the separator 130 is located in the gap between the battery cell 120 and the housing 110.

[0090] In the above technical solution, by distributing at least a portion of the separator 130 in the gap between the battery cell 120 and the housing 110, the separator 130 can participate in forming the flow channel space 140 together with the battery cell 120 and the housing 110. The separator 130 can seal the gap between the battery cell 120 and the housing 110, which helps to improve the sealing performance of the flow channel space 140 formed between the separator 130, the battery cell 120 and the housing 110, and reduces the risk of heat exchange medium leakage in the flow channel space 140. This helps to improve the safety and service life of the battery device 100.

[0091] The battery cell 120 can be spaced apart from the housing 110 so that the heat exchange medium can flow into the gap between the battery cell 120 and the housing 110. This facilitates heat exchange between the battery cell 120 and the side opposite to the housing 110, which helps to increase the heat exchange area of ​​the battery cell 120. The partition assembly 130 can connect the side wall of the battery cell 120 opposite to the housing 110 to the housing 110 so that a flow channel space 140 is formed between the partition assembly 130, the battery cell 120 and the housing 110, which helps to improve the sealing of the flow channel space 140.

[0092] Referring to Figures 9 and 10, in some embodiments of this application, the separator assembly 130 includes a seal 132 for sealing the gap between the housings 121 of adjacent battery cells 120, and / or, the seal 132 for sealing the gap between the housings 121 and the enclosure 110.

[0093] In the above technical solution, by setting the sealing element 132, the sealing performance of the flow channel space 140 located between adjacent battery cells 120 is improved, and / or, it is beneficial to improve the sealing performance of the flow channel space 140 located between the battery cell 120 and the housing 110, which is beneficial to reduce the risk of heat exchange medium leakage.

[0094] A gap is formed between adjacent battery cells 120. A seal 132 can be arranged between the housings 121 of adjacent battery cells 120 and used to seal the gap between adjacent housings 121, thereby improving the sealing performance of the flow channel space 140 between adjacent battery cells 120 and reducing the risk of heat exchange medium leakage.

[0095] A gap is formed between the battery cell 120 and the housing 110. The seal 132 is used to seal the gap between the housing 121 and the housing 110 to improve the sealing performance of the flow channel space 140 between the housing 121 and the housing 110 and reduce the risk of leakage of the heat exchange medium.

[0096] A gap is formed between adjacent battery cells 120, and a gap is also formed between battery cells 120 and housing 110. The seal 132 can seal the gap between housing 121 and housing 110 and the gap between adjacent battery cells 120, thereby improving the sealing performance of the flow channel space 140 and reducing the risk of leakage when the medium is changed.

[0097] Referring to Figures 9 and 10, in some embodiments of this application, the partition assembly 130 further includes a support member 131, which is disposed on the outer periphery of the top of the housing 121 and is used to support the seal member 132, which seals the connection between the support member 131 and the housing 121.

[0098] In the above technical solution, by providing a first support member 131 on the housing 121, the sealing member 132 can be installed. The first support member 131 can also provide elastic support to the battery cell 120, which helps to overcome the expansion of the battery cell 120 and can also buffer mechanical collisions.

[0099] It should be noted that "top of housing 121" refers to the area above the first sidewall 1211 and the second sidewall 1212, or the portion of the first sidewall 1211 and the second sidewall 1212 that is close to the end cap 1213, rather than the side surface of the end cap 1213 that is away from the flow channel space 140.

[0100] For example, the support member 131 is disposed on the top of the housing 121, and the support member 131 can be disposed around the housing 121 in the circumferential direction. The support member 131 can be elastically supported between the housings 121 of two adjacent battery cells 120 and between the housing 121 and the box 110 to buffer mechanical collisions and help maintain the stability of the flow channel space 140. The support member 131 can also serve as a carrier for the seal 132 to facilitate the arrangement of the seal 132. At the same time, the seal 132 seals the support member 131 and the housing 121, improving the reliability of the connection between the support member 131 and the housing 121 and reducing the risk of leakage of the heat exchange medium between the support member 131 and the housing 121.

[0101] The support member 131 can be configured as an elastic material, such as foam or silicone, so that the support member 131 can provide elastic support, overcome the expansion of the battery cell 120 and buffer mechanical impact. The support member 131 is fixed to the top of the housing 121 by the seal 132, and at least part of the separator 130 is provided between every two adjacent battery cells 120. During the process of processing multiple battery cells 120 into a group, tooling is used to compress the battery device 100. At this time, the support member 131 between adjacent battery cells 120 can provide elastic support force, which helps to make the gap between multiple battery cells 120 uniform, so that the housing 121 of the battery cell 120 and the separator 130 together define the flow channel space 140.

[0102] In some embodiments of this application, there are multiple support members 131, and the multiple support members 131 are correspondingly fitted onto the housing 121 of multiple battery cells 120. The support members 131 corresponding to adjacent battery cells 120 are fixedly engaged; or adjacent battery cells 120 are fixedly connected to a part of the same support member 131.

[0103] In the above technical solution, by setting multiple support members 131, and having multiple support members 131 correspondingly fitted onto the housings 121 of multiple battery cells 120, the battery cells 120 and their corresponding support members 131 are positioned and installed, and the support members 131 corresponding to adjacent battery cells 120 are fixedly engaged. This helps to improve the assembly stability of the support members 131 corresponding to adjacent battery cells 120, and also helps to improve the elastic support effect of the support members 131 on adjacent battery cells 120. Alternatively, by fixing adjacent battery cells 120 to a part of the same support member 131, the number of support members 131 can be reduced, the assembly steps of the battery device 100 can be reduced, and the production cost of the battery device 100 can be reduced.

[0104] In some examples, referring to Figure 9, there are multiple support members 131. Each support member 131 is formed in a ring shape and is sleeved on the top of the housing 121. The support members 131 corresponding to adjacent battery cells 120 can be fixedly engaged by means of bonding or other methods to improve the positional stability of the support members 131 corresponding to adjacent battery cells 120.

[0105] In other examples, the support member 131 can be formed as a grid structure. For example, multiple through holes can be pre-processed on the support member 131 according to the preset arrangement of the battery cells 120. The support member 131 can be sleeved onto the housing 121 of multiple battery cells 120 through the multiple through holes and can be sealed and fixed by the sealing member 132. In this way, adjacent battery cells 120 can be fixedly connected to a part of the same support member 131.

[0106] It is understandable that the arrangement of the battery cell 120 and the support 131 can be determined according to actual production requirements, and no specific limitation is made here.

[0107] In some embodiments of this application, the support member 131 is a first foam, and / or the thickness of the support member 131 ranges from 2mm to 10mm.

[0108] In the above technical solution, by constructing the support member 131 as a first foam, the support member 131 has elasticity and oil resistance, which helps to reduce the weight of the support member 131 and improve the temperature resistance of the support member 131, thereby helping to improve the service life of the battery device 100. By designing the thickness of the support member 131, the elastic support effect of the first foam is improved, while the space occupied by the first foam is reduced, reducing the risk of the overall volume of the battery device 100 increasing due to the excessive thickness of the first foam, and also reducing the material cost of the first foam, thereby helping to reduce the production cost of the battery device 100.

[0109] Referring to Figures 9 and 10, the thickness of the first foam is defined as L1, where 2mm ≤ L1 ≤ 10mm. For example, the thickness L1 of the first foam can be 2mm, 2.5mm, 3mm, 3.6mm, 5mm, 7mm, 9mm, 10mm, etc. When L1 < 2mm, the thickness of the first foam is too small, resulting in limited elastic support. Consequently, the first foam has limited ability to overcome the expansion of the battery cell 120 and buffer mechanical collisions. Furthermore, the structural strength of the flow channel space 140 defined by the first foam is poor, making the flow channel space 140 prone to damage and leakage. When L1 > 10mm, the thickness of the first foam is too large. Although it can improve the elastic support effect of the first foam, it will result in a large arrangement space required for the first foam, making it inconvenient to set up. At the same time, it will increase the amount of material used for the first foam, increasing the production cost of the battery device 100.

[0110] It is understandable that the specific thickness of the first foam can be determined according to actual production requirements, and no specific limit is made here.

[0111] In some other embodiments of this application, the support 131 may also be configured as other flexible cushioning material such as rubber.

[0112] In some embodiments of this application, the sealant 132 is a sealant.

[0113] In the above technical solution, by constructing the sealant 132 as a sealant, the support 131 is fixed and sealed to the housing 121 of the battery cell 120, and no additional fixing structure is required on the housing 121, which is beneficial to improving the assembly convenience of the support 131.

[0114] Referring to Figures 9 and 10, in some embodiments of this application, the housing 121 includes a sidewall and an end cap 1213. The sidewall is arranged circumferentially around the end cap 1213, and the end cap 1213 is provided with electrode terminals 122. The support member 131 has an adhesive coating surface 1311 on the side opposite to the flow channel space 140. The sealant 132 is a sealant, which is disposed on the adhesive coating surface 1311 and glued to the connection between the end cap 1213 and the sidewall.

[0115] In the above technical solution, by providing an adhesive coating surface 1311 on the side of the support member 131 facing the end cap 1213, the support member 131 can provide support for the seal 132, which helps to reduce the risk of the seal 132 dripping, facilitates automated adhesive application, and improves the consistency of the adhesive application process. The seal 132 is located on the adhesive coating surface 1311 and is glued to the connection between the end cap 1213 and the side wall, so as to fix and seal the support member 131 and the housing 121, which helps to improve the sealing effect of the seal 132. Furthermore, the seal 132 can avoid the end cap 1213, which helps to reduce the risk of the seal 132 interfering with the electrical connection of the electrode terminal 122.

[0116] It should be noted that the sidewall includes the first sidewall 1211 and the second sidewall 1212 mentioned above. In other words, the "sidewall" can be specifically understood as the wall surface of the shell 121 extending in the circumferential direction. The end cap 1213 is located at the top of the sidewall, and the sidewall is connected to the outer periphery of the end cap 1213.

[0117] For example, the support member 131 is formed as an annular ring and is fitted over the top of the housing 121. The support member 131 and the end cap 1213 are spaced apart in the third direction. The support member 131 has an adhesive surface 1311 on the side facing the end cap 1213 in the third direction. The adhesive surface 1311 can support the seal 132. The seal 132 can extend in the third direction from the adhesive surface 1311 toward the end cap 1213, so as to make the seal 132 glued to the connection between the end cap 1213 and the side wall. This is beneficial to increase the sealing area of ​​the seal 132, improve the sealing effect of the seal 132, and seal the connection between the end cap 1213 and the side wall, reducing the risk of cracking at the connection between the end cap 1213 and the side wall.

[0118] It should be noted that "third direction" can be understood as the height direction of the battery device 100, and the specific direction can be shown in Figure 2 or Figure 10.

[0119] Referring to FIG10, in some embodiments of this application, the minimum distance between the adhesive surface 1311 and the surface of the end cap 1213 facing away from the sidewall ranges from 1mm to 5mm.

[0120] In the above technical solution, space can be reserved for the sealing element 132, which helps to reduce the risk of adhesive overflow after the sealing element 132 is squeezed. There is no need to arrange additional components in the battery device 100 to prevent adhesive overflow, which helps to simplify the structure of the battery device 100. Furthermore, when the busbar is set on the side of the end cover 1213, there is no need to wait for the sealing element 132 to dry, which helps to improve the production and assembly efficiency of the battery device 100. At the same time, it helps to reduce the risk of occupying the flow channel space 140 due to the excessive distance between the adhesive surface 1311 and the surface of the end cover 1213 facing away from the flow channel space 140. It also helps to increase the area of ​​the flow channel space 140, thereby improving the heat exchange effect of the battery cell 120.

[0121] Referring to Figure 10, the minimum distance between the adhesive-coated surface 1311 and the surface of the end cap 1213 facing away from the flow channel space 140 in the third direction is defined as H1, where 1mm ≤ H1 ≤ 5mm. For example, H1 can be 1mm, 1.5mm, 2mm, 3mm, or 5mm, etc. Considering that in the process of processing multiple battery cells 120 into a group, tooling is needed to extrude the battery assembly 100. When H1 < 1mm, the tooling is prone to adhesive overflow when extruding the battery assembly 100. Considering the limited size of the battery cell 120, the adhesive-coated surface 1311 is arranged on the support. The side of component 131 facing away from the flow channel space 140 means that when the distance between the adhesive coating surface 1311 and the surface of end cap 1213 facing away from the flow channel space 140 is large, it will occupy the arrangement space of the flow channel space 140, resulting in a small area of ​​the flow channel space 140. When H1 > 5mm, the minimum distance between the adhesive coating surface 1311 and the surface of end cap 1213 facing away from the flow channel space 140 is too large. Although it can effectively reduce the risk of adhesive overflow, it will reduce the area of ​​the flow channel space 140 and the flow area of ​​the heat exchange medium, resulting in poor heat exchange effect of the battery cell 120.

[0122] It is understandable that the minimum distance between the adhesive-coated surface 1311 and the surface of the end cap 1213 facing away from the sidewall can be determined according to actual production requirements, and no specific limit is made here.

[0123] Referring to Figures 2, 3 and 11, in some embodiments of this application, the battery device 100 further includes an adhesive layer 134, and the end of the housing 121 facing away from the electrode terminal 122 is fixed to the bottom plate 113 of the housing 110 by the adhesive layer 134.

[0124] In the above technical solution, by setting an adhesive layer 134, the housing 121 and the bottom plate 113 of the box 110 are fixedly assembled, and the assembly stability of the housing 121 and the bottom plate is improved, thereby improving the stability of the electrical connection of the battery cell 120. At the same time, by fixing the end of the housing 121 away from the electrode terminal 122 to the bottom plate 113 of the box 110, the risk of mutual interference between the electrode terminal 122 and the bottom plate 113 of the box 110 is reduced, so as to avoid the electrode terminal 122 being blocked, and to facilitate the electrical connection between the battery cell 120 and the external circuit.

[0125] The housing 110 includes a base plate 113, which supports the battery cell 120 so that the battery cell 120 can be installed into the housing 110. For example, the battery cell 120 can be arranged in the housing 110 perpendicular to the base plate 113 in a third direction. The housing 121 is provided with an electrode terminal 122 at the end away from the base plate 113 in the third direction. The end of the housing 121 near the base plate 113 in the third direction can be fixedly connected to the base plate 113 by an adhesive layer 134.

[0126] Optionally, the fixing method between the end of the housing 121 away from the electrode terminal 122 and the bottom plate 113 of the box 110 can also be bonding, snap-fitting or plugging, etc. The specific fixing method can be determined according to the actual production requirements and is not limited here, as long as the assembly reliability of the housing 121 and the bottom plate 113 is guaranteed.

[0127] In some embodiments, the adhesive layer 134 is formed as a square frame, which improves the connection reliability between the housing 121 and the bottom plate 113 of the box 110, while also reducing the amount of material used in the adhesive layer 134, thereby helping to reduce the production cost of the battery device 100.

[0128] For example, each battery cell 120 may be provided with an adhesive layer 134, which may extend circumferentially along the housing 121 of the battery cell 120; or, the adhesive layer 134 may be formed into a mesh structure so that the adhesive layer 134 can simultaneously fix multiple battery cells 120 to the base plate 113.

[0129] It is understandable that the specific arrangement of the adhesive layer 134 can be determined according to actual production requirements, and no specific restrictions are made here.

[0130] Referring to Figures 9 and 10, in some embodiments of this application, the battery device 100 further includes a blocking component 133, which is sleeved onto the housing 121. An adhesive layer 134 is provided on the side of the blocking component 133 facing the bottom plate 113 of the housing 110, and the adhesive layer 134 is fixed to the bottom plate 113.

[0131] In the above technical solution, by providing a blocking component 133 on the housing 121, and providing an adhesive layer 134 on the side of the blocking component 133 facing the bottom plate 113, the adhesive layer 134 can fix the blocking component 133 to the housing 121, which is beneficial to improving the assembly reliability of the blocking component 133 and the housing 121. Furthermore, the adhesive layer 134 seals between the housing 121 and the blocking component 133, which is beneficial to improving the sealing performance between the blocking component 133 and the housing 121, thereby reducing the risk of bottom leakage of the heat exchange medium in the self-flow channel space 140. Simultaneously, the adhesive layer 134 can also serve as… The blocking component 133 serves to fix the housing 121 to the base plate 113, which helps to improve the assembly convenience of the housing 121 and the box 110. In addition, the adhesive layer 134 occupies a certain space, which can save the amount of heat exchange medium and reduce the weight and cost of the battery device 100. The blocking component 133 can separate the flow channel space 140 from the adhesive layer 134, preventing the adhesive layer 134 from overflowing into the flow channel space 140. Furthermore, the blocking component 133 can provide elastic support to the battery cell 120, which helps to overcome the expansion of the battery cell 120 and can also buffer mechanical collisions.

[0132] The blocking component 133 can be configured as a flexible material, such as foam or silicone, so that the blocking component 133 can provide elastic support, overcome the impact of the battery cell 120, and buffer mechanical impact. The blocking component 133 is fixed to the end of the housing 121 near the bottom plate 113 by the adhesive layer 134. That is, the blocking component 133 can be fixed to the bottom of the housing 121. During the process of processing multiple battery cells 120 into a group, tooling is used to squeeze the battery device 100. At this time, the blocking component 133 between adjacent battery cells 120 can provide elastic support, which helps to make the gap between multiple battery cells 120 uniform. This facilitates the housing 121 of the battery cell 120 and the separator component 130 to jointly define the flow channel space 140. Furthermore, the blocking component 133 can block the adhesive layer 134 on the side facing the flow channel space 140 to prevent the adhesive layer 134 from overflowing into the flow channel space 140.

[0133] The adhesive layer 134 is fixed to the base plate 113 so as to fix the end of the housing 121 away from the electrode terminal 122 to the base plate 113 of the housing 110. The adhesive layer 134 can also seal the end of the flow channel space 140 near the base plate 113, improve the sealing performance of the flow channel space 140, and reduce the risk of heat exchange medium leakage.

[0134] Referring to FIG10, in some embodiments of this application, the blocking component 133 is a second foam, and / or the thickness of the blocking component 133 ranges from 2mm to 10mm.

[0135] In the above technical solution, by constructing the blocking component 133 as a second foam, the blocking component 133 is made elastic and oil-resistant, which helps to reduce the weight of the blocking component 133 and improve the temperature resistance of the blocking component 133, thereby improving the service life of the battery device 100. By designing the thickness of the blocking component 133, the supporting effect of the blocking component 133 is improved, while the space occupied by the blocking component 133 is reduced, reducing the risk of the overall volume of the battery device 100 increasing due to the excessive thickness of the blocking component 133, and reducing the material cost of the blocking component 133, thereby reducing the production cost of the battery device 100.

[0136] In some examples, the blocking component 133 is a second foam.

[0137] Referring to Figure 10, in some examples, the thickness of the blocking component 133 ranges from 2mm to 10mm.

[0138] Referring to Figures 9 and 10, the thickness of the blocking component 133 is defined as L2, where 2mm ≤ L2 ≤ 10mm. For example, the thickness L2 of the blocking component 133 can be 2mm, 2.5mm, 3mm, 3.6mm, 6mm, 8mm, 10mm, etc. When L2 < 2mm, the thickness of the blocking component 133 is too small, resulting in limited support effect of the blocking component 133. Furthermore, the structural strength of the flow channel space 140 defined by the blocking component 133 is poor, making the flow channel space 140 prone to damage and leakage. When L2 > 10mm, the thickness of the blocking component 133 is too large. Although it can improve the support effect of the blocking component 133, it will result in a large arrangement space required for the blocking component 133, making it inconvenient to set up the blocking component 133. At the same time, it will also lead to an increase in the amount of material used for the blocking component 133, increasing the production cost of the battery device 100.

[0139] It is understandable that the specific thickness of the blocking component 133 can be determined according to actual production requirements, and no specific limit is made here.

[0140] In some examples, the blocking component 133 is a second foam, and the thickness of the blocking component 133 ranges from 2mm to 10mm. By constructing the blocking component 133 as a second foam, the blocking component 133 has elasticity and oil resistance, which helps to reduce the weight of the blocking component 133 and improve the temperature resistance of the blocking component 133, thereby helping to improve the service life of the battery device 100. By further designing the thickness of the blocking component 133, the elastic support effect of the blocking component 133 can be improved, while reducing the space occupied by the blocking component 133 and reducing the risk of the overall volume of the battery device 100 increasing due to the excessive thickness of the blocking component 133. It also helps to reduce the material cost of the blocking component 133, thereby helping to reduce the production cost of the battery device 100.

[0141] It is understandable that the specific material configuration and thickness of the blocking component 133 can be determined according to actual production requirements, and no specific limitations are made here.

[0142] In other embodiments of this application, the blocking component 133 may also be configured as other flexible cushioning material components such as rubber components.

[0143] Referring to Figures 9 and 10, in some embodiments of this application, the housing further includes a bottom cover 1214. In the third direction, the bottom cover 1214 is disposed opposite to the end cover 1213. The sidewalls extend along the circumferential direction of the bottom cover 1214 and the end cover 1213 and are respectively connected to the outer periphery of the bottom cover 1214 and the end cover 1213, thereby realizing the fixed connection of the sidewalls, the bottom cover 1214 and the end cover 1213, so that a space for filling electrolyte can be formed inside the housing 121.

[0144] Referring to Figures 9 and 10, in some embodiments of this application, the blocking component 133 has an adhesive surface 1331 on the side facing away from the flow channel space 140, and an adhesive layer 134 is disposed on the adhesive surface 1331 and glued to the connection between the bottom cover 1214 and the side wall.

[0145] In the above technical solution, by providing an adhesive surface 1331 on the side of the blocking component 133 away from the flow channel space 140, the blocking component 133 can provide support for the adhesive layer 134, which helps to reduce the risk of the adhesive layer 134 dripping. The adhesive layer 134 is provided on the adhesive surface 1331 and glued to the connection between the bottom cover 1214 and the side wall, so as to fix and seal the blocking component 133, which helps to improve the sealing effect of the adhesive layer 134.

[0146] The blocking component 133 is formed in an annular shape and is fitted over the bottom of the housing 121. The blocking component 133 and the bottom cover 1214 are spaced apart in the third direction. The blocking component 133 forms an adhesive surface 1331 on the side facing the bottom cover 1214 in the third direction to support the adhesive layer 134. The adhesive layer 134 can extend along the self-adhesive surface 1331 in the third direction towards the bottom cover 1214 so that the adhesive layer 134 can be glued to the connection between the bottom cover 1214 and the side wall, which helps to increase the sealing area of ​​the adhesive layer 134 and improve the sealing effect of the adhesive layer 134.

[0147] It should be noted that "bottom of housing 121" refers to the area below the first sidewall 1211 and the second sidewall 1212, or the part of the first sidewall 1211 and the second sidewall 1212 that is close to the bottom cover 1214, rather than the side surface of the bottom cover 1214 that is away from the flow channel space 140.

[0148] Referring to Figures 9 and 10, the minimum distance between the adhesive surface 1331 and the surface of the bottom cover 1214 that is away from the sidewall ranges from 1mm to 5mm.

[0149] In the above technical solution, space can be reserved for the adhesive layer 134, which helps to reduce the risk of adhesive overflow after the adhesive layer 134 is squeezed, and also helps to reduce the risk of occupying the flow channel space 140 due to the excessive distance between the adhesive surface 1331 and the surface of the bottom cover 1214 that is away from the flow channel space 140. It also helps to increase the area of ​​the flow channel space 140 and improve the heat exchange effect of the battery cell 120.

[0150] Referring to Figure 10, the minimum distance between the adhesive surface 1331 and the surface of the bottom cover 1214 facing away from the sidewall is defined as H2 in the third direction, where 1mm ≤ H2 ≤ 5mm. For example, H2 can be 1mm, 1.5mm, 2mm, 3mm, or 5mm, etc. Considering that in the process of processing multiple battery cells 120 into a group, tooling is needed to compress the battery assembly 100, when H2 < 1mm, the tooling is prone to adhesive overflow when compressing the battery assembly 100. Considering the limited size of the battery cell 120, the adhesive surface 1331 is arranged on the support member 1. 31 is the side away from the flow channel space 140. That is to say, when the distance between the adhesive surface 1331 and the surface of the bottom cover 1214 away from the flow channel space 140 is large, it will occupy the arrangement space of the flow channel space 140, resulting in a small area of ​​the flow channel space 140. When H2 > 5mm, the minimum distance between the adhesive surface 1331 and the surface of the bottom cover 1214 away from the flow channel space 140 is too large. Although it can effectively reduce the risk of adhesive overflow, it will reduce the area of ​​the flow channel space 140 and the flow area of ​​the heat exchange medium, resulting in poor heat exchange effect of the battery cell 120.

[0151] It is understandable that the minimum distance between the adhesive surface 1331 and the surface of the bottom cover 1214 that is away from the flow channel space 140 can be determined according to actual production requirements, and no specific limit is made here.

[0152] Referring to Figures 11 to 13, in some embodiments of this application, the base plate 113 is a hollow multi-layered structure.

[0153] The above technical solution is beneficial to improving the structural strength of the base plate 113, thereby improving the support effect of the base plate 113 on the battery cell 120, reducing the risk of the base plate 113 being crushed, reducing the weight of the base plate 113, and reducing the material cost of the base plate 113. This is beneficial to achieving a lightweight design of the battery device 100 and reducing the production cost of the battery device 100.

[0154] In some examples, a cavity may be defined within the base plate 113, and reinforcing plates spaced apart in a third direction may be arranged within the cavity. It is understood that the specific structure of the base plate 113 can be determined according to actual production requirements, and no specific limitation is made here, as long as the structural strength of the base plate 113 meets the usage requirements.

[0155] In some further embodiments, the hollow base plate 113 may be provided with reinforcing ribs to further improve the structural strength of the base plate 113, thereby improving the support stability of the base plate 113 for the battery cell 120.

[0156] It is understandable that the specific structure of the base plate 113 can be determined according to actual production requirements, and no specific limitations are made here.

[0157] Referring to Figures 3, 4, and 12 to 19, in some embodiments of this application, the battery device 100 further includes a flow guiding component 150, which is disposed within the flow channel space 140 and connected to the housing 121 to divide the flow channel space 140 into a flow guiding path 160.

[0158] In the above technical solution, by setting the flow guiding component 150, the flow channel space 140 is divided to form a flow guiding path 160. The flow guiding path 160 is conducive to optimizing the flow path of the heat exchange medium in the flow channel space 140, so as to guide the heat exchange medium to flow in an orderly and fast manner, improve the flow effect of the heat exchange medium in the flow channel space 140, and reduce the occurrence of the heat exchange medium not being able to be discharged in time after heat exchange, thereby improving the heat exchange effect between the heat exchange medium and the battery cell 120.

[0159] For example, referring to Figures 3 and 4, the flow guiding component 150 can divide the flow channel space 140 into multiple independent flow guiding paths 160. Along the flow direction perpendicular to the heat exchange medium, the cross-sectional area of ​​the flow guiding path 160 is smaller than the cross-sectional area of ​​the flow channel space 140, which is beneficial to increasing the flow velocity of the heat exchange medium, thereby improving the heat exchange efficiency of the heat exchange medium to the battery cell 120. Furthermore, the heat exchange medium entering the flow channel space 140 can flow into multiple independent flow guiding paths 160 to exchange heat at different positions of the battery cell 120, thereby improving the heat exchange effect of the battery cell 120. Alternatively, the flow guiding component 150 can divide the flow channel space 140 into a curved and extended flow guiding path 160 to extend the flow path of the heat exchange medium in the flow channel space 140, which is beneficial to improving the heat exchange effect of the heat exchange medium to the battery cell 120.

[0160] Referring to Figures 12 to 15, in some embodiments of this application, the flow guiding component 150 is configured to participate in defining the flow guiding path 160, which is connected to the inlet 143 and the outlet 144 of the flow channel space 140, respectively, and the flow guiding path 160 includes multiple branch paths, which are connected in series and / or in parallel.

[0161] In the above technical solution, by flexibly designing the flow path 160, it is beneficial to improve the arrangement effect of the flow path 160 in the flow channel space 140, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120, and further improving the temperature uniformity of the battery cell 120.

[0162] The heat exchange medium can flow into the guide path 160 from the liquid inlet 143 of the flow channel space 140. When the heat exchange medium flows in the guide path 160, it can exchange heat with the battery cell 120. After heat exchange, the heat exchange medium can be discharged from the flow channel space 140 through the liquid outlet 144.

[0163] Multiple flow paths can be connected in series. For example, some of the flow paths have different extension directions, and a bend 151 is provided between two flow paths with different extension directions so that the flow path 160 can be formed into a bend and extended flow path 160, thereby extending the flow path of the heat exchange medium in the flow channel space 140. This is beneficial to improving the heat exchange effect of the heat exchange medium on the battery cell 120, thereby improving the temperature uniformity of the battery cell 120.

[0164] The flow path 160 may include multiple branch paths, which can be connected in parallel. This allows the flow path 160 to be evenly distributed within the flow channel space 140, thereby facilitating heat exchange between the heat exchange medium and different locations of the battery cells 120 within the flow channel space 140. This improves the heat exchange effect of the heat exchange medium on the battery cells 120, thus enhancing the uniformity of the heat exchange within the battery cells 120. The flow path 160 may include multiple branch paths, which can be connected in series or in parallel. For example, some branch paths can be connected in parallel and evenly spaced within the flow channel space 140, while other branch paths can be located at both ends of the parallel branch paths and connected in series with them to serve as inlet or outlet channels. This improves both the uniform distribution of the heat exchange medium within the flow channel space and the flow efficiency of the heat exchange medium, thereby enhancing the heat exchange effect of the heat exchange medium on the battery cells 120.

[0165] It is understandable that the specific arrangement of the flow path 160 can be determined according to actual production requirements, and no specific restrictions are made here.

[0166] It should be noted that "branching path" can be understood as the collective term for the following branch flow path 161, main inlet flow path 162, main outlet flow path 163, and branch inlet flow path 164.

[0167] Referring to Figures 12 to 15, in some embodiments of this application, the flow guiding component 150 includes a plurality of first flow guiding elements 152, which cooperate to define the flow guiding path 160.

[0168] In the above technical solution, by setting up multiple first flow guides 152 that cooperate with each other and participate in defining the flow guide path 160, it is beneficial to increase the structural complexity of the flow guide path 160, thereby further improving the flow effect of the heat exchange medium in the flow channel space 140, so that the heat exchange medium can fully exchange heat with the battery cell 120, thereby improving the temperature uniformity of the battery cell 120.

[0169] The flow guiding assembly 150 may include two spaced-apart first flow guiding elements 152, and at least part of the two first flow guiding elements 152 are adjacent and opposite to each other. The adjacent and opposite side surfaces of the two first flow guiding elements 152 are defined as their flow guiding surfaces. The heat exchange medium can flow between the two flow guiding surfaces to enable the two first flow guiding elements 152 to cooperate in defining the flow guiding path 160.

[0170] It is understood that the above-mentioned flow guiding component 150 including two first flow guiding elements 152 is only an example of this application and should not be construed as a limitation of this application. The flow guiding component 150 may also include three first flow guiding elements 152, four first flow guiding elements 152, etc. The specific number of first flow guiding elements 152 can be determined according to actual production requirements and is not specifically limited here.

[0171] Referring to Figures 12 through 15, in some embodiments of this application, each first guide element 152 defines a portion of a guide path 160 with the inner wall of the housing 110 and / or the partition assembly 130; adjacent first guide elements 152 define a portion of the guide path 160.

[0172] In the above technical solution, by having the first flow guide 152 cooperate with the inner wall and / or partition component 130 of the housing 110, and by having adjacent first flow guides 152 cooperate to define different parts of the flow path 160, it is beneficial to increase the structural complexity of the flow path 160, thereby facilitating the full flow of the heat exchange medium within the flow channel space 140. Since the inner wall and / or partition component 130 of the housing 110 is part of the battery device 100, by having the first flow guide 152 cooperate with the structure of the battery device 100 itself, it is easy to define the flow path 160 without the need for additional components to define the flow path 160, which helps to reduce the arrangement of the first flow guide 152, thereby simplifying the structure of the battery device 100 and reducing the manufacturing and processing costs of the battery device 100.

[0173] In some examples, each first flow guide 152 has a surface that is opposite to and spaced apart from the inner wall of the housing 110. The surface of each first flow guide 152 that is opposite to and spaced apart from the inner wall of the housing 110 can together define a portion of the flow path 160 with the inner wall of the housing 110. At least a portion of adjacent first flow guides 152 are opposite to and spaced apart to define a portion of the flow path 160.

[0174] In other examples, each first guide 152 has a surface that is opposite to and spaced apart from the separator 130. The surface of each first guide 152 that is opposite to and spaced apart from the separator 130 can together with the separator 130 define a portion of the guide path 160. At least a portion of adjacent first guides 152 are opposite to and spaced apart to define a portion of the guide path 160.

[0175] In some other examples, each first flow guide 152 has a surface that is opposite to and spaced apart from the inner wall of the housing 110. The surface of each first flow guide 152 that is opposite to and spaced apart from the inner wall of the housing 110 can together define a portion of the flow path 160 with the inner wall of the housing 110. At the same time, each first flow guide 152 has a surface that is opposite to and spaced apart from the partition assembly 130. The surface of each first flow guide 152 that is opposite to and spaced apart from the partition assembly 130 can together define another portion of the flow path 160 with the partition assembly 130. At least a portion of adjacent first flow guides 152 are opposite to and spaced apart to define yet another portion of the flow path 160.

[0176] It is understandable that the specific limitation method of the flow path 160 can be determined according to the actual production requirements, and no specific limitation is made here.

[0177] Referring to Figures 12 and 13, in some embodiments of this application, each first guide member 152 includes a plurality of first extensions 1521 and a plurality of second extensions 1522. The extension directions of the first extensions 1521 and the second extensions 1522 have an angle. The first extensions 1521 and the second extensions 1522 are adjacent and connected. At least one second extension 1522 of a first guide member 152 extends into the space between adjacent second extensions 1522 of another first guide member 152.

[0178] In the above technical solution, by designing the structure of the first flow guide 152 and the arrangement of multiple first flow guides 152, multiple first flow guides 152 can participate in defining a flow path 160. The flow path 160 has a complex structure and can be evenly distributed in the flow channel space 140, which is beneficial to extending the flow path of the heat exchange medium in the flow channel space 140, increasing the heat exchange area between the battery cell 120 and the heat exchange medium, improving the heat exchange effect of the heat exchange medium, and thus improving the temperature uniformity of the battery cell 120.

[0179] In some specific embodiments, referring to Figures 12 and 13, the housing 121 is provided with partition components 130 on both sides in the third direction. The two sides of the housing 121 in the first direction are opposite to the inner wall of the box 110. The flow guiding component 150 includes two first flow guiding members 152. Each first flow guiding member 152 may include two first extensions 1521 and two second extensions 1522. The two first extensions 1521 can extend along the third direction and are spaced apart in the first direction. One of the two first extensions 1521 is connected to the partition component 130, and the other of the two first extensions 1521 is spaced apart from the partition component 130. The two second extensions 1522 extend along the third direction and are spaced apart in the first direction. One of the two second extensions 1522 is connected between the two first extensions 1521, and the other of the two second extensions 1522 is connected to one of the first extensions 1521 that is spaced apart from the separator component 130. The two first guide members 152 extend in opposite directions, and the second extension 1522 of one of the two first guide members 152 extends into the space between the two oppositely arranged second extensions 1522 of the other first guide member 152. At the same time, one of the first extensions 1521 of the first guide member 152 extends into the space between the two oppositely arranged first extensions 1521 of the other first guide member 152.

[0180] Thus, through the mutual cooperation between the two first flow guides 152, and the cooperation between the two first flow guides 152 and the inner walls of the separator 130 and the housing 110 respectively, a flow guide path 160 with multiple bends 151 is defined. For example, referring to Figures 12 and 13, taking the flow guide path 160 located on the left side of the first direction in Figure 13 as an example, the extension direction of the flow guide path 160 can be as follows: first extending upward along the third direction - extending to the left along the first direction - extending downward along the third direction - extending to the right along the first direction - extending upward along the third direction - extending to the left along the first direction - extending upward along the third direction - extending to the right along the first direction - extending downward along the third direction - extending to the left along the first direction - extending upward along the first direction. The flow guide path 160 is evenly distributed in the flow channel space 140. When the heat exchange medium flows along the flow guide path 160, it can exchange heat with different positions of the battery cell 120, which is beneficial to improving the temperature uniformity of the battery cell 120.

[0181] Of course, it is understandable that the extension direction of the flow guide path 160 can also be other, such as the extension direction of the flow guide path 160 being opposite to the above extension direction. The specific extension direction of the flow guide path 160 can be determined according to the arrangement of the liquid inlet 143 and the liquid outlet 144 and the actual heat exchange requirements, and no specific limitation is made here.

[0182] Referring to Figures 14 and 15, in some embodiments of this application, one of the first guide members 152 includes two oppositely arranged first extensions 1521 and two oppositely arranged second extensions 1522, the first extensions 1521 and the second extensions 1522 are adjacent and connected, and another first guide member 152 is formed in an L shape, with another first guide member 152 disposed between adjacent second extensions 1522.

[0183] In the above technical solution, by making one of the first flow guides 152 include two oppositely arranged first extensions 1521 and two oppositely arranged second extensions 1522, and the other first flow guide 152 is formed in an L-shape, multiple first flow guides 152 can participate in defining a flow path 160, and the flow path 160 can be evenly distributed in the flow channel space 140. This is beneficial to extend the flow path of the heat exchange medium in the flow channel space 140, and can increase the contact area between the battery cell 120 and the heat exchange medium, thereby improving the heat exchange effect of the heat exchange medium, which in turn is beneficial to improving the temperature uniformity of the battery cell 120. Furthermore, the L-shape of the first flow guide 152 makes its structure simpler and reduces the material used in the first flow guide 152, thereby reducing the production and processing cost of the battery device 100.

[0184] In some specific embodiments, referring to Figures 14 and 15, the housing 121 is provided with partition components 130 on both sides in the third direction. The two sides of the housing 121 in the first direction are opposite to the inner wall of the box 110. The flow guiding component 150 includes two first flow guiding members 152. Each first flow guiding member 152 may include two first extensions 1521 and two second extensions 1522. The two first extensions 1521 can extend along the third direction and are spaced apart in the first direction. The two first extensions 1521 are respectively close to the inner wall of the box 110 on both sides of the housing 121 in the first direction and are spaced apart from the inner wall of the box 110, so that the two first extensions 1521 can respectively define a part of the flow guiding path 160 with the inner wall of the box 110. Furthermore, one end of one of the two first extensions 1521 is connected to the separator component 130, and the other of the two first extensions 1521 is spaced apart from the separator component 130. The two second extensions 1522 extend along a first direction and are spaced apart in a third direction. One of the two second extensions 1522 is connected between the two first extensions 1521 and defines a portion of the flow path 160 between itself and the separator component 130. The other of the two second extensions 1522 is connected to one of the two first extensions 1521 that is spaced apart from the separator component 130 and is also spaced apart from the other first extension 1521. The second extension 1522 connected to only one of the first extensions 1521 defines a portion of the flow path 160 between itself and the separator component 130.

[0185] Another first guide 152 is formed in an L shape and can extend between the two second extensions 1522 through the gap between the second extension 1522 and the first extension 1521.

[0186] Thus, through the mutual cooperation between the two first flow guides 152, and the cooperation between the opposing first extension 1521 and the opposing second extension 1522 and the inner wall of the partition assembly 130 and the housing 110, a flow guide path 160 with multiple bends is defined. For example, referring to Figures 14 and 15, taking the flow guide path 160 located on the left side of the first direction in Figure 15 as an example, the extension direction of the flow guide path 160 can be as follows: first extending upward along a third direction - extending to the left along the first direction - extending downward along a third direction - extending to the right along the first direction - extending upward along a third direction - extending to the left along the first direction - extending upward along a third direction - extending to the right along the first direction - extending downward along a third direction. The flow guide path 160 is evenly distributed in the flow channel space 140. When the heat exchange medium flows along the flow guide path 160, it can exchange heat with different positions of the battery cell 120, which is beneficial to improving the temperature uniformity of the battery cell 120.

[0187] Of course, it is understandable that the extension direction of the flow guide path 160 can also be other, such as the extension direction of the flow guide path 160 being opposite to the above extension direction. The specific extension direction of the flow guide path 160 can be determined according to the arrangement of the liquid inlet 143 and the liquid outlet 144 and the actual heat exchange requirements, and no specific limitation is made here.

[0188] Referring to Figures 16 to 19, in some embodiments of this application, the flow path 160 includes multiple parallel branch flow paths 161. In the above technical solution, by including multiple parallel branch flow paths 161 in the flow path 160, the heat exchange medium can be diverted after flowing into the flow path 160, allowing simultaneous heat exchange at different locations of the battery cell 120. This improves the heat exchange efficiency of the heat exchange medium on the battery cell 120, and the fact that different locations of the battery cell 120 exchange heat with the heat exchange medium in the same temperature range improves the temperature uniformity of the battery cell 120.

[0189] Multiple parallel branch flow paths 161 can be arranged sequentially along a third direction within the flow channel space 140, and each branch flow path 161 is connected to the liquid inlet 143 and the liquid outlet 144 respectively. After the heat exchange medium enters the flow channel space 140 through the liquid inlet 143, it can flow into the multiple branch flow paths 161 respectively to exchange heat with the battery cell 120. Then the heat exchange medium can flow out from the branch flow path 161 and be discharged from the flow channel space 140 through the liquid outlet 144.

[0190] In other examples, multiple parallel branch flow paths 161 can also be arranged sequentially along the first direction within the flow channel space 140. The specific arrangement of the branch flow paths 161 can be determined according to actual production requirements and is not specifically limited here.

[0191] Referring to Figures 16 and 17, in some embodiments of this application, the flow path 160 further includes a main inlet flow path 162 and a main outlet flow path 163. The main inlet flow path 162 is connected to the liquid inlet 143 of the flow channel space 140. The first ends of multiple branch flow paths 161 are respectively connected to the main inlet flow path 162, and the second ends of multiple branch flow paths 161 are respectively connected to the main outlet flow path 163. The main outlet flow path 163 is connected to the liquid outlet 144 of the flow channel space 140.

[0192] In the above technical solution, by setting a total inlet flow path 162 and a total outlet flow path 163 that are respectively connected to the two ends of the branch flow path 161, it is beneficial to make the heat exchange medium enter the flow channel space 140 and flow in an orderly manner along the guide path 160, which is beneficial to improve the flow efficiency of the heat exchange medium, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0193] Multiple branch flow paths 161 can be arranged sequentially along a third direction. The main inlet flow path 162 can extend in a straight line along a third direction. The main inlet flow path 162 is connected to the liquid inlet 143 and is also connected to the first end of each of the multiple branch flow paths 161. The heat exchange medium flows into the main inlet flow path 162 through the liquid inlet 143 and can then be diverted and flow into each of the multiple branch flow paths 161. The main outlet flow path 163 can extend in a straight line along a third direction. The main outlet flow path 163 is connected to the liquid outlet 144 and is also connected to the second end of each of the multiple branch flow paths 161. The heat exchange medium in the multiple branch flow paths 161 can flow into the main outlet flow path 163 and be discharged through the liquid outlet 144 into the free flow space.

[0194] It is understood that the arrangement of the multiple branch flow paths 161 and the extension of the main inlet flow path 162 and the main outlet flow path 163 are merely examples of this application and should not be construed as limitations on this application. The multiple branch flow paths 161 may also have other arrangements, and similarly, the main inlet flow path 162 and the main outlet flow path 163 may also have other extensions. The specific arrangement of the multiple branch flow paths 161 and the extension of the main inlet flow path 162 and the main outlet flow path 163 can be determined according to actual production requirements and are not specifically limited here.

[0195] Referring to Figures 16 and 17, in some embodiments of this application, the main inlet flow path 162 has at least one first bend 1621 and / or the main outlet flow path 163 has at least one second bend 1631.

[0196] The above technical solution is beneficial to extending the flow path 160 and to making the flow path 160 evenly distributed in the flow space, thereby making the heat exchange medium flow fully in the flow channel space 140, improving the heat exchange effect between the heat exchange medium and the battery cell 120, and thus improving the temperature uniformity of the battery cell 120.

[0197] The main inlet flow path 162 may have a first bend 1621. For example, the main inlet flow path 162 may first extend upward along a third direction, and then extend to the left along a first direction. Multiple branch flow paths 161 may be arranged sequentially along the first direction. The portion of the main inlet flow path 162 extending along the first direction is connected to the multiple branch flow paths 161 respectively.

[0198] In other examples, the main inlet flow path 162 may have two first bends 1621. For example, the main inlet flow path 162 may first extend upward along a third direction, then extend to the left along a first direction, and then extend downward along a third direction. Multiple branch flow paths 161 may be arranged sequentially along the third direction. The portion of the main inlet flow path 162 extending downward along the third direction may be connected to the multiple branch flow paths 161 respectively.

[0199] In some examples, the main outlet flow path 163 may have a second bend 1631. For example, the main outlet flow path 163 may first extend downward along a third direction and then extend to the left along a first direction. Multiple branch flow paths 161 may be arranged sequentially along the first direction, and the portion of the main outlet flow path 163 extending along the first direction is connected to the multiple branch flow paths 161 respectively.

[0200] In other examples, the main outlet flow path 163 may have two second bends 1631. For example, the main outlet flow path 163 may first extend downward along a third direction, then extend to the left along a first direction, and then extend upward along a third direction. Multiple branch flow paths 161 may be arranged sequentially along the third direction. The portion of the main outlet flow path 163 extending upward along the third direction may be connected to the multiple branch flow paths 161 respectively.

[0201] In some other examples, the main inlet flow path 162 has multiple first bends 1621, while the main outlet flow path 163 has multiple second bends 1631. Referring to Figures 16 and 17, for example, the main inlet flow path 162 may have two first bends 1621, and the main outlet flow path 163 may have two second bends 1631. The main inlet flow path 162 may first extend upward along a third direction, then extend to the left along a first direction, and then extend downward along a third direction. The main outlet flow path 163 may first extend downward along a third direction, then extend to the left along a first direction, and then extend upward along a third direction. Multiple branch flow paths 161 may be arranged sequentially along a third direction and connected to the portion of the main inlet flow path 162 extending downward along a third direction and the portion of the main outlet flow path 163 extending downward, respectively.

[0202] It is understood that the number of the first bend 1621 and the second bend 1631 can be determined according to actual production requirements, and no specific limitation is made here. Furthermore, the extension method of the main inlet flow path 162 and the main outlet flow path 163 and the arrangement method of the multiple branch flow paths 161 are only one embodiment of this application and should not be construed as a limitation of this application. The extension method of the main inlet flow path 162 and the main outlet flow path 163 and the arrangement method of the multiple branch flow paths 161 can also be other.

[0203] Referring to Figures 16 and 17, in some embodiments of this application, the flow guiding assembly 150 includes a second flow guiding member 153, a third flow guiding member 154, and a fourth flow guiding member 155. The second flow guiding member 153 and the inner wall of the flow channel space 140 define a total inlet flow path 162. The third flow guiding member 154 and the inner wall of the flow channel space 140 define a total outlet flow path 163. The fourth flow guiding member 155 is located between the second flow guiding member 153 and the third flow guiding member 154. A branch flow path 161 is defined between the fourth flow guiding member 155 and the second flow guiding member 153. The branch flow path 161 is defined between the fourth flow guiding member 155 and the third flow guiding member 154.

[0204] In the above technical solution, by setting the second flow guide 153, the third flow guide 154 and the fourth flow guide 155, a flow guide path 160 with a total inlet flow path 162, a total outlet flow path 163 and multiple parallel branch flow paths 161 is defined. This is beneficial to improve the structural complexity of the flow guide path 160 and to make the flow guide path 160 evenly distributed in the flow channel space 140. This is beneficial to further improve the flow effect of the heat exchange medium in the flow channel space 140, so that the heat exchange medium can fully exchange heat with the battery cell 120, thereby improving the temperature uniformity of the battery cell 120.

[0205] The flow channel space 140 can be constructed as a cuboid space. The second flow guide 153 can be disposed at one end of the flow channel space 140 and can cooperate with the inner wall of the flow channel space 140 to define a total inlet flow path 162 for the heat exchange medium to flow in. The third flow guide 154 can be disposed opposite to the second flow guide 153 and disposed at the other end of the flow channel space 140. The third flow guide 154 can cooperate with the inner wall of the flow channel space 140 to define a total outlet flow path 163 for the heat exchange medium to flow out. The fourth flow guide 155 is disposed between the second flow guide 153 and the third flow guide 154 to separate the space between the second flow guide 153 and the third flow guide 154. The fourth flow guide 155 can define branch flow paths 161 that are respectively connected to the total inlet flow path 162 and the total outlet flow path 163 with the second flow guide 153 and the third flow guide 154.

[0206] After the heat exchange medium flows into the flow channel space 140 through the liquid inlet 143, it can flow into the total inlet flow path 162 defined by the second guide member 153 and the inner wall of the flow channel space 140. Then, the heat exchange medium can be further divided to flow into the branch flow path 161 defined between the fourth guide member 155 and the second guide member 153 and the branch flow path 161 defined between the fourth guide member 155 and the third guide member 154, so that the heat exchange medium can exchange heat at different positions of the battery cell 120. After heat exchange, the heat exchange medium can flow from the branch flow path 161 into the total outlet flow path 163 and then be discharged from the flow space through the liquid outlet 144.

[0207] Referring to Figures 16 and 17, in some embodiments of this application, there are multiple fourth flow guides 155 arranged at intervals, and a branch flow path 161 is defined between adjacent fourth flow guides 155.

[0208] The above technical solution is beneficial to increasing the number of branch flow paths 161, thereby further improving the structural complexity of the flow guide path 160, and also beneficial to improving the uniformity of the distribution of the flow guide path 160 in the flow channel space 140, which is beneficial to further improving the flow effect of the heat exchange medium in the flow channel space 140, so that the heat exchange medium can fully exchange heat with the battery cell 120, thereby improving the temperature uniformity of the battery cell 120.

[0209] Multiple fourth flow guides 155 are disposed between the second flow guide 153 and the third flow guide 154. Among the multiple fourth flow guides 155, the fourth flow guide 155 arranged closer to the second flow guide 153 can define a branch flow path 161 with the second flow guide 153. Among the multiple fourth flow guides 155, the fourth flow guide 155 arranged closer to the third flow guide 154 can define a branch flow path 161 with the third flow guide 154. At the same time, two adjacent fourth flow guides 155 can define a branch flow path 161, and the multiple branch flow paths 161 can be arranged in parallel to facilitate the splitting or merging of the heat exchange medium.

[0210] It is understandable that the specific quantity of the fourth guide component 155 can be determined according to actual production requirements, and no specific limit is made here.

[0211] Referring to Figures 16 and 17, in some embodiments of this application, the second guide member 153 and the third guide member 154 are both formed in an L-shape, and the fourth guide member 155 is formed in a straight line.

[0212] In the above technical solution, by setting the second flow guide 153 to an L-shape, the total inlet flow path 162 can have at least one first bend 1621. By forming the third flow guide 154 to an L-shape, the total outlet flow path 163 can have at least one second bend 1631. This increases the structural complexity of the flow path 160, which is beneficial to extending the flow path of the heat exchange medium in the flow channel space 140, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120. By making the fourth flow guide 155 to a straight shape, it is convenient to arrange the fourth flow guide 155 between the second flow guide 153 and the third flow guide 154, which is beneficial to improving the assembly convenience of the flow guide assembly 150, thereby improving the assembly efficiency of the battery device 100.

[0213] Referring to Figures 16 and 17, the housing 121 is provided with partition components 130 on both sides in the third direction. The two sides of the housing 121 in the first direction are opposite to the inner wall of the box 110. A portion of the second flow guide 153 can be connected to the partition component 130 located at the bottom of the housing 121 and extends in the third direction toward the partition component 130 located at the top of the housing 121. This portion of the second flow guide 153 is spaced apart from the inner wall of the box 110 to define a portion of the total inlet flow path 162. Another portion of the second flow guide 153 extends in the first direction and defines another portion of the total inlet flow path 162 with the partition component 130 located at the top of the housing 121. A portion of the third guide member 154 is connected to the partition assembly 130 located at the top of the housing 121 and extends in a third direction toward the partition assembly 130 located at the bottom of the housing 121. This portion of the third guide member 154 is spaced apart from the inner wall of the housing 110 to define a portion of the total outlet flow path 163. Another portion of the third guide member 154 extends in a first direction toward the second guide member 153 and is spaced apart from the second guide member 153. Two fourth guide members 155 extending in the first direction are arranged between the second guide member 153 and the third guide member 154 so that three branch flow paths 161 can be formed between the second guide member 153 and the third guide member 154.

[0214] Thus, through the mutual cooperation between the second guide member 153 and the third guide member 154 and the inner wall of the flow channel space 140, as well as the cooperation between the second guide member 153, the third guide member 154 and the fourth guide member 155, a flow path 160 with a main inlet flow path 162, a branch flow path 161 and a main outlet flow path 163 is defined. The main inlet flow path 162 may have two first bends 1621, the main outlet flow path 163 may have two second bends 1631, and three branch flow paths 161 are connected and arranged in parallel between the main inlet flow path 162 and the main outlet flow path 163.

[0215] For example, referring to Figures 16 and 17, let's take the flow path 160 located on the left side of the first direction in Figure 17 as an example: The extension direction of the flow path 160 can be as follows: the main inlet flow path 162 extends upward along the third direction, then extends to the left along the first direction, and then extends downward along the third direction; the three branch flow paths 161 are arranged in sequence along the third direction and all extend to the right along the first direction, respectively connecting with the part of the main inlet flow path 162 extending downward along the third direction; the main outlet flow path 163 extends downward along the third direction, then extends to the left along the first direction, and then extends upward along the third direction. The flow path 160 is evenly distributed in the flow channel space 140. When the heat exchange medium flows along the flow path 160, it can exchange heat with different positions of the battery cell 120, which is beneficial to improving the temperature uniformity of the battery cell 120.

[0216] Of course, it is understandable that the extension direction of the flow guide path 160 can also be other, such as the extension direction of the flow guide path 160 being opposite to the above extension direction. The specific extension direction of the flow guide path 160 can be determined according to the arrangement of the liquid inlet 143 and the liquid outlet 144 and the actual heat exchange requirements, and no specific limitation is made here.

[0217] Referring to Figures 18 and 19, in some embodiments of this application, the flow path 160 includes a plurality of parallel-connected diversion inlet channels 164, the inlet ends of which are respectively connected to the liquid inlet 143 of the flow channel space 140.

[0218] In the above technical solution, by setting multiple diversion inlet channels 164, the heat exchange medium can be diverted after entering the channel space 140 through the liquid inlet 143. This is beneficial to improving the heat exchange efficiency of the heat exchange medium to the battery cell 120, and also beneficial to achieving uniform distribution of the heat exchange medium in the channel space 140. This is beneficial to improving the heat exchange uniformity of the heat exchange medium to the battery cell 120, and further beneficial to improving the temperature uniformity of the battery cell 120.

[0219] The flow path 160 may include three branch inlet channels 164, which may be arranged at intervals along a third direction. For example, the three branch inlet channels 164 may be located near the top, middle and bottom of the housing 121 respectively. When the heat exchange medium enters the flow channel space 140 through the liquid inlet 143, it can be branched to flow into the three branch inlet channels respectively, thereby exchanging heat at the top, middle and bottom of the battery cell 120 respectively, which is beneficial to improving the heat exchange efficiency and heat exchange uniformity of the heat exchange medium to the battery cell 120.

[0220] It is understood that the above-mentioned flow path 160, which includes three diversion inlet channels 164, is only an example of this application and should not be construed as a limitation of this application. The number of diversion inlet channels 164 can also be two, four, etc. The specific number of diversion inlet channels 164 can be determined according to actual production requirements and is not specifically limited here.

[0221] Referring to Figures 18 and 19, in some embodiments of this application, at least one diversion inlet channel 164 has a third bend 1641.

[0222] In the above technical solution, by having at least one branch inlet channel 164 have a third bend 1641, it is beneficial to extend the flow path 160, thereby extending the flow path of the heat exchange medium in the flow channel space 140, which in turn is beneficial to improve the heat exchange effect of the heat exchange medium on the battery cell 120, and also beneficial to make the flow path 160 uniformly distributed in the flow channel space 140, thereby improving the heat exchange uniformity of the heat exchange medium on the battery cell 120, and thus improving the temperature uniformity of the battery cell 120.

[0223] The flow path 160 may include two parallel branch inlet channels 164. One of the two branch inlet channels 164 may extend in a straight line, and the other of the two branch inlet channels 164 may have a third bend 1641 to bend in its extension direction. This is beneficial because different branch inlet channels 164 can be arranged to correspond to different positions of the battery cell 120, thereby improving the heat exchange uniformity of the heat exchange medium to the battery cell 120.

[0224] In other examples, the flow path 160 may include two parallel branch inlet channels 164, each of which may have a third bend 1641, so that both branch inlet channels 164 can bend in their extension direction, which is beneficial to increasing the length of the flow path 160, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0225] It is understandable that the number and arrangement of the diversion inlet channels 164 and the number of their third bends 1641 can be other than those specified here.

[0226] Referring to Figures 18 and 19, in some embodiments of this application, the flow path 160 further includes a converging outlet flow path 170, the outlet ends of the multiple branch inlet flow paths 164 are respectively connected to the converging outlet flow path 170, and the converging outlet flow path 170 is connected to the liquid outlet 144 of the flow channel space 140.

[0227] In the above technical solution, by setting up a converged outlet flow path 170, the heat exchange medium after diversion can be merged through the converged outlet flow path 170, which is conducive to the orderly discharge of the heat exchange medium and to improving the discharge efficiency of the heat exchange medium in the flow channel space 140.

[0228] Multiple branch inlet channels 164 can be arranged at intervals in a third direction, and the multiple branch inlet channels 164 can extend in a straight line along a first direction. The inlet ends of the multiple branch inlet channels 164 can be directly connected to the liquid inlet 143. The outlet ends of the multiple branch inlet channels 164 can be provided with a converging inlet channel 162 extending in a third direction. The converging inlet channel 162 is connected to the outlet ends of the multiple branch inlet channels 164 respectively, and the converging inlet channel 162 is also connected to the liquid outlet 144. The heat exchange medium in the multiple branch inlet channels 164 can merge in the converging inlet channel 162 and then be discharged from the channel space 140 through the liquid outlet 144.

[0229] In other examples, multiple branch inlet channels 164 may be arranged at intervals in a third direction, and each branch inlet channel 164 may have a third bend 1641, that is, each branch inlet channel 164 may bend at least once in its extension direction. The converging outlet channel 170 is connected between the outlet ends of the multiple branch inlet channels 164 and the liquid outlet 144. The heat exchange medium in the multiple branch inlet channels 164 may merge in the converging inlet channel 162 and then be discharged from the channel space 140 through the liquid outlet 144.

[0230] It is understandable that the extension method of the diversion inlet channel 164 and the arrangement method of the summation outlet channel 170 can be other, and no specific limitation is made here.

[0231] Referring to Figures 18 and 19, in some embodiments of this application, the flow path 160 further includes a plurality of parallel branch flow paths 161. The first end of the plurality of branch flow paths 161 is connected to one of the branch inlet flow paths 164, the second end of the plurality of branch flow paths 161 is connected to the sum outlet flow path 170, and the remaining branch inlet flow paths 164 are directly connected to the sum outlet flow path 170.

[0232] In the above technical solution, by setting multiple branch flow paths 161 connected in parallel and communicating with one of the branch inlet flow paths 164, it is beneficial to achieve uniform distribution of the flow path 160 in the flow channel space 140. After the heat exchange medium flows in from the branch inlet flow path 164 connected to the branch flow path 161, it can be further divided to exchange heat at different positions of the battery cell 120. This is beneficial to improve the heat exchange efficiency and heat exchange uniformity of the heat exchange medium to the battery cell 120, thereby improving the temperature uniformity of the battery cell 120.

[0233] Referring to Figures 18 and 19, the flow path 160 may include two parallel branch inlet channels 164. Taking the flow path 160 located on the left side of the first direction in Figure 19 as an example, the extension direction of one of the two branch inlet channels 164 can be: first extending upward along the third direction - extending to the left along the first direction - extending downward along the third direction. Multiple parallel branch channels 161 can be spaced apart in the third direction and all extend along the first direction. The first ends of the multiple branch channels 161 can be connected to the portion of the branch inlet channel 164 extending downward along the third direction, and the second ends of the multiple branch channels 161 can be connected to the summing outlet channel 170. The extension direction of the other of the two branch inlet channels 164 can be: extending to the left along the first direction - extending upward along the third direction - extending to the left along the first direction and directly connected to the summing outlet channel 170 located on the left side of the flow space 140 in the first direction.

[0234] It is understood that the structure of the above-mentioned flow path 160 is only an example of this application and should not be construed as a limitation of this application. The structure of the flow path 160 can also be other, for example: the flow path 160 can also have three branch inlet channels 164, and the extension method of the three branch inlet channels 164 can be different from the extension method of the above-mentioned branch inlet. No specific limitation is made here.

[0235] Referring to Figures 18 and 19, in some embodiments of this application, the flow path 160 further includes a central converging flow channel 180, the first end of which is connected to the second end of a plurality of branch flow paths 161, and the second end of which is connected to a converging outlet flow path 170.

[0236] In the above technical solution, by setting a central converging flow channel 180, the heat exchange medium that has been diverted at multiple branch flow paths 161 can be merged through the central converging flow channel 180, so that the heat exchange medium flowing into multiple branch flow paths 161 can be orderly discharged into the converging outlet flow path 170 through the central converging flow channel 180, which is beneficial to improving the discharge efficiency of the heat exchange medium from the flow channel space 140.

[0237] Referring to Figures 18 and 19, the flow path 160 may include two parallel branch inlet channels 164. Taking the flow path 160 located on the left side of the first direction in Figure 19 as an example, the extension direction of one of the two branch inlet channels 164 can be: first extending upward along the third direction - extending to the left along the first direction - extending downward along the third direction. Multiple parallel branch channels 161 can be spaced apart in the third direction and all extend along the first direction. The first ends of the multiple branch channels 161 can be connected to the branch inlet channel respectively. The portion of 164 extending downward along a third direction is connected. The second end of the multiple branch flow paths 161 is provided with a central converging flow path 180. The extension method of the central converging flow path 180 can be: extending downward along a third direction - extending to the left along a first direction. The portion of the central converging flow path 180 extending downward along a third direction can be connected to the second end of the multiple branch flow paths 161. The portion of the central converging flow path 180 extending to the left along the first direction can be connected to the converging outlet flow path 170 located on the left side of the flow space 140 in the first direction.

[0238] It is understood that the structure of the above-mentioned flow path 160 is only an example of this application and should not be construed as a limitation of this application. The specific structure of the flow path 160 is not limited here.

[0239] Referring to Figures 18 and 19, in some embodiments of this application, the flow guiding assembly 150 includes a fifth flow guiding member 156, a sixth flow guiding member 157, a seventh flow guiding member 158, and an eighth flow guiding member 159. The fifth flow guiding member 156 is formed in a U-shape with its opening facing the sixth flow guiding member 157 to help define a plurality of branch inlet channels 164. The sixth flow guiding member 157 is formed in an L-shape, and a portion of the sixth flow guiding member 157 extends into the fifth flow guiding member 156. Between the fifth flow guiding member 156 and the sixth flow guiding member 157... A central converging flow path 180 is defined; the seventh guide member 158 and the eighth guide member 159 are both formed as straight lines, and the extension directions of the seventh guide member 158 and the eighth guide member 159 have an angle. The seventh guide member 158 is located inside the fifth guide member 156, and the eighth guide member 159 is located outside the fifth guide member 156 and the sixth guide member 157. A branch flow path 161 is defined between the seventh guide member 158 and the fifth guide member 156; the eighth guide member 159 participates in defining the converging outlet flow path 170.

[0240] In the above technical solution, by setting the fifth guide element 156, the sixth guide element 157, the seventh guide element 158 ​​and the eighth guide element 159, a guide path 160 with multiple branch inlet channels 164, multiple parallel branch channels 161, a central convergence channel 180 and a convergence outlet channel 170 is defined. This is beneficial to achieve uniform distribution of the guide path 160 in the channel space 140, and to improve the flow effect of the heat exchange medium in the channel space 140. This allows the heat exchange medium to fully exchange heat with the battery cell 120, thereby improving the temperature uniformity of the battery cell 120.

[0241] Referring to Figures 18 and 19, the housing 121 is provided with partition components 130 on both sides in the third direction. At the same time, the two sides of the housing 121 in the first direction are opposite to the inner wall of the box 110. The fifth guide member 156 can be located at the center of the flow channel space 140 in the third direction, and the opening of the fifth guide member 156 can be open along the first direction. A part of the fifth guide member 156 can cooperate with the partition components 130 located at the bottom of the housing 121 to define a diversion inlet flow channel 164. The sixth guide member 157 is located at the opening end of the fifth guide member 156, and a part of the sixth guide member 157 extends into the fifth guide member 156. The other part of the sixth guide member 157 can be located on the outside of the fifth guide member 156 and defines a part of the summing outlet flow path 170 with the inner wall of the box 110 located at the opening end of the fifth guide member 156.

[0242] Another part of the fifth guide member 156 can cooperate with the inner wall of the housing 110 located away from its opening end, the partition assembly 130 located on the top of the housing 121, and the sixth guide member 157 to define another branch inlet channel 164. The seventh guide member 158 can be disposed inside the fifth guide member 156 and located at the opening of the sixth guide member 157. The seventh guide member 158 can extend along the first direction and cooperate with the sixth guide member 157 and the fifth guide member 156 to define multiple branch channels 161. At the same time, the fifth guide member 156 and the sixth guide member 157 cooperate to define a central convergence channel 180 that communicates with the multiple branch channels 161.

[0243] The eighth guide member 159 can be connected to the partition component 130 located at the bottom of the housing 121 and extend upward in a third direction. The eighth guide member 159 is adjacent to and spaced apart from the inner wall of the box 110 located at the opening end of the fifth guide member 156, so as to participate in defining a partial aggregate outlet flow path 170. At the same time, the eighth guide member 159 is spaced apart from the opening end of the fifth guide member 156 and the sixth guide member 157, so that the central aggregate flow channel 180 and the diversion inlet flow channel 164 defined by the fifth guide member 156 and the partition component 130 located at the bottom of the housing 121 can be connected to the aggregate outlet flow path 170.

[0244] Thus, through the cooperation between the fifth guide member 156, the sixth guide member 157, the seventh guide member 158, the eighth guide member 159, the partition assembly 130, and the inner wall of the housing 110, a guide path 160 is defined, which has multiple branch inlet channels 164, multiple parallel branch channels 161, a central convergence channel 180, and a convergence outlet channel 170.

[0245] For example, referring to Figures 18 and 19, the flow path 160 can have two branch inlet channels 164, three parallel branch channels 161, a central converging channel 180, and a converging outlet channel 170. Taking the flow path 160 located on the left side of the first direction in Figure 19 as an example, the extension method of the flow path 160 can be as follows: one of the two branch inlet channels 164 first extends upward along the third direction, then extends to the left along the first direction, and then extends downward along the third direction. The three parallel branch channels 161 can be spaced apart in the third direction and all extend along the first direction. The first ends of the multiple branch channels 161 can be connected to the portion of the branch inlet channel 164 extending downward along the third direction, respectively. The second end of the flow path 161 is provided with a central converging flow channel 180; the extension method of the central converging flow channel 180 can be: extending downward along a third direction - extending to the left along a first direction, wherein the part of the central converging flow channel 180 extending downward along a third direction can be connected to the second end of multiple branch flow paths 161, and the part of the central converging flow channel 180 extending to the left along the first direction can be connected to the converging outlet flow path 170 located on the left side of the flow channel space 140 in the first direction; another of the two branch inlet flow paths 164 is provided near the bottom of the flow channel space 140, and its extension direction can be: first extending to the left along the first direction - extending upward along a third direction and connecting with the converging outlet flow path 170 located on the left side of the flow channel space 140 in the first direction.

[0246] After the heat exchange medium enters the flow channel space 140 through the liquid inlet 143, it is first divided by two branch inlet channels 164. A portion of the heat exchange medium flows through one of the two branch inlet channels 164 to multiple branch channels 161 and is divided again. The heat exchange medium discharged from the multiple branch channels 161 merges through the central converging channel 180 and flows into the converging outlet channel 170, and then is discharged from the flow channel space 140 through the liquid outlet 144. Another portion of the heat exchange medium flows directly to the converging outlet channel 170 through the other of the two branch inlets and is discharged from the flow channel space 140 through the liquid outlet 144. When the heat exchange medium flows along the guide path 160, it can exchange heat with different positions of the battery cell 120, which is beneficial to improving the temperature uniformity of the battery cell 120.

[0247] Of course, it is understandable that the extension direction of the flow guide path 160 can also be other, such as the extension direction of the flow guide path 160 being opposite to the above extension direction. The specific extension direction of the flow guide path 160 can be determined according to the arrangement of the liquid inlet 143 and the liquid outlet 144 and the actual heat exchange requirements, and no specific limitation is made here.

[0248] In some embodiments of this application, the flow guiding component 150 is foam and fixed to the housing 121.

[0249] In the above technical solution, by configuring the flow guiding component 150 as foam, the flow guiding component 150 can have oil resistance and can be elastically supported between the shells 121 of adjacent battery cells 120. This helps to reduce the impact of the expansion of the battery cells 120 on the separation effect of the flow guiding component 150, and can also play a role in buffering and shock absorption, which helps to improve the service life of the battery device 100. At the same time, the foam is lightweight, which helps to achieve the lightweight design of the battery device 100.

[0250] In some embodiments, the foam can be fixed to the housing 121 by adhesive bonding, which helps to ensure the sealing of different parts of the flow path 160 defined by the flow guiding component 150; in other embodiments, the foam can be fixed to the housing 121 by a structure such as a snap fastener, so as to facilitate the assembly and disassembly of the foam; of course, it is understood that the method of fixing the foam to the housing 121 can also be other, and no specific limitation is made here.

[0251] As shown in Figure 16, in some embodiments of this application, the width of the flow guiding component 150 ranges from 2mm to 10mm.

[0252] The above technical solution is beneficial to improving the structural strength of the flow guiding component 150, reducing the risk of damage to the flow guiding path 160 separated by the poor structural strength of the flow guiding component 150, and at the same time, it is beneficial to reduce the space occupied by the flow guiding component 150 in the flow channel space 140, and to increase the area of ​​the flow guiding path 160, thereby improving the flow rate of the heat exchange medium entering the flow channel space 140, and further improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0253] Referring to Figure 16, within the same vertical plane, the dimension of the flow guiding component 150 perpendicular to its extension direction is defined as the width H2 of the flow guiding component 150, where 2mm ≤ H2 ≤ 10mm. For example, the width H2 of the flow guiding component 150 can be 2mm, 2.5mm, 3mm, 3.6mm, 10mm, etc. When H2 < 2mm, the width of the flow guiding component 150 is small, and the structural strength of the flow guiding component 150 is poor. When the pressure of the heat exchange medium in the flow guiding path 160 is high, the flow guiding component 150 is easily damaged, which leads to the destruction of the flow guiding path 160 and affects the flow effect of the heat exchange medium in the flow channel space 140. Since the space in the flow channel space 140 is limited, when H2 > 10mm, the area of ​​the flow guiding path 160 defined by the flow guiding component 150 will be small due to the excessive space occupied by the flow guiding component 150 in the flow channel space 140, thus affecting the flow rate of the heat exchange medium.

[0254] It is understandable that the width of the flow guide component 150 can be determined according to actual production requirements, and no specific limitation is made here.

[0255] Referring to Figures 21 to 23, as well as Figures 26 and 28, in some embodiments of this application, the battery device 100 further includes a first turbulence protrusion 190, which is disposed on the flow guiding assembly 150 and extends toward the flow guiding path 160.

[0256] In the above technical solution, by setting a first turbulence protrusion 190 extending into the flow path 160, the flow direction of the heat exchange medium is changed, which is beneficial to increasing the Reynolds number of the heat exchange medium and improving the turbulence or turbulent flow effect of the heat exchange medium when flowing in the flow path 160. This is beneficial to increasing the heat transfer coefficient of the heat exchange medium and solving the problem of laminar heat transfer difference in the flow path 160, improving the heat transfer effect of the heat exchange medium on the battery cell 120, and thus improving the temperature uniformity of the battery cell 120.

[0257] Along the direction perpendicular to the flow of the heat exchange medium, a first turbulence protrusion 190 may be provided on one side wall of the flow guide path 160, and the first turbulence protrusion 190 is spaced apart from the other side wall of the flow guide path 160. When the heat exchange medium flows to the position of the first turbulence protrusion 190, the first turbulence protrusion 190 will interfere with the flow of part of the heat exchange medium, so that part of the heat exchange medium can change its flow direction, thereby improving the turbulence effect of the heat exchange medium.

[0258] Referring to Figures 21 to 23, as well as Figures 26 and 28, in some embodiments of this application, there are multiple first turbulence protrusions 190, which are spaced apart along the length of the guide path 160.

[0259] In the above technical solution, by arranging multiple first turbulence protrusions 190 at intervals along the length of the guide path 160, the heat exchange medium can be continuously interfered with by the first turbulence protrusions 190 during its flow within the guide path 160. This is beneficial to improving the turbulence effect of the heat exchange medium, thereby improving the heat exchange effect between the heat exchange medium and the battery cell 120. Furthermore, it is beneficial to ensure that the heat exchange medium is evenly distributed in the guide path 160, thereby improving the heat exchange uniformity of the heat exchange medium to the battery cell 120.

[0260] It should be noted that "the length direction of the flow path 160" can also be understood as the flow direction of the heat exchange medium.

[0261] Along the direction perpendicular to the flow of the heat exchange medium, a plurality of first turbulence protrusions 190 may be provided on one side wall of the flow guide path 160, and the plurality of first turbulence protrusions 190 may be evenly spaced along the length of the flow guide path 160; or, along the direction perpendicular to the flow of the heat exchange medium, a plurality of first turbulence protrusions 190 may be provided on one side wall of the flow guide path 160, and the plurality of first turbulence protrusions 190 may be spaced according to a specific pattern; of course, it is understood that the specific arrangement of the first turbulence protrusions 190 can be determined according to actual production requirements, and no specific limitation is made here.

[0262] Referring to Figures 21 to 23, as well as Figures 26 and 28, in some embodiments of this application, the opposite sidewalls of the flow path 160 are provided with first turbulence protrusions 190.

[0263] In the above technical solution, by setting first turbulence protrusions 190 on the opposite sidewalls of the flow path 160, it is beneficial to improve the interference effect on the heat exchange medium, thereby improving the turbulence effect of the heat exchange medium, and further improving the heat exchange effect between the heat exchange medium and the battery cell 120.

[0264] First turbulence protrusions 190 are provided on the opposite sidewalls of the flow path 160. Multiple first turbulence protrusions 190 on each sidewall can be arranged at intervals according to a certain pattern, and the first turbulence protrusions 190 on the opposite sidewalls can be staggered in the direction perpendicular to the flow of the heat exchange medium.

[0265] Referring to Figures 21 to 23, as well as Figures 26 and 28, in some embodiments of this application, the first turbulence protrusions 190 on opposite sidewalls of the guide path 160 are staggered along the length of the guide path 160.

[0266] In the above technical solution, by staggering the first turbulence protrusions 190 on the opposite sidewalls of the flow guide path 160, it is beneficial to further improve the interference effect on the heat exchange medium, thereby improving the turbulence effect of the heat exchange medium. At the same time, it is beneficial to make the heat exchange medium uniformly distributed in the flow guide path 160, so as to improve the heat exchange effect and heat exchange uniformity between the heat exchange medium and the battery cell 120.

[0267] In the flow direction perpendicular to the heat exchange medium, multiple first turbulence protrusions 190 can be provided on the opposite sidewalls of the flow guide path 160. The first turbulence protrusions 190 on each sidewall can be evenly spaced. Multiple first turbulence protrusions 190 on one sidewall can extend one-to-one into the space between two adjacent first turbulence protrusions 190 on another sidewall and be spaced apart, so that the first turbulence protrusions 190 on the opposite sidewalls of the flow guide path 160 are staggered in the length direction of the flow guide path 160.

[0268] Referring to Figures 26 and 27, in some embodiments of this application, in the direction perpendicular to the extension of the flow path 160, the distance h1 between the tops of two adjacent first turbulence protrusions 190 is ≥2mm, and the distance h2 between each first turbulence protrusion 190 and its opposite sidewall is ≥2mm.

[0269] It should be noted that "the top of the first turbulence protrusion 190" refers to the end of the first turbulence protrusion 190 away from the side wall on which it is located, or it can be understood as the end of the first turbulence protrusion 190 facing the side wall opposite to it.

[0270] In the above technical solution, it is beneficial to improve the interference effect of the first turbulence protrusion 190 on the heat exchange medium, thereby improving the turbulence effect of the heat exchange medium, and also to prevent the flow path 160 from being blocked due to the small distance between the first turbulence protrusion 190 and the side wall opposite to it, thus improving the smoothness of the flow of the heat exchange medium in the flow path 160.

[0271] In the direction perpendicular to the extension of the flow path 160, the first turbulence protrusions 190 on the opposite sidewalls of the flow path 160 are staggered, and the distance h1 between the tops of two adjacent first turbulence protrusions 190 is ≥2mm. For example, the distance h1 between the tops of two adjacent first turbulence protrusions 190 can be 2mm, 3mm, 3.5mm or 4mm, etc. That is to say, the first turbulence protrusion 190 on one sidewall can extend into the space between two adjacent first turbulence protrusions 190 on another sidewall, so that the heat exchange medium can be continuously disturbed and its flow direction changed by multiple staggered first turbulence protrusions 190 when it flows, thereby improving the turbulence effect of the heat exchange medium.

[0272] Furthermore, considering that when the distance between the first turbulence protrusion 190 and its opposite sidewall is too small, it may hinder the flow of the heat exchange medium, resulting in low flow efficiency of the heat exchange medium, the distance h2 between each first turbulence protrusion 190 and its opposite sidewall needs to be greater than or equal to 2mm, so as to improve the turbulence effect of the first turbulence protrusion 190 on the heat exchange medium and improve the flow smoothness of the heat exchange medium. Here, h2 can be 2mm, 3mm, 3.5mm, etc.

[0273] It is understandable that the specific values ​​of h1 and h2 can be determined based on actual production requirements, and no specific restrictions are made here.

[0274] In some embodiments of this application, the first turbulence protrusion 190 is foam.

[0275] In the above technical solution, the first turbulence protrusion 190 is configured as foam to facilitate the processing and molding of the first turbulence protrusion 190 and to facilitate the assembly of the first turbulence protrusion 190. The foam has sound absorption and vibration reduction effects, so as to reduce the noise generated by the flow of the heat exchange medium while improving the turbulence effect of the heat exchange medium.

[0276] In some embodiments, both the flow guiding component 150 and the first turbulence protrusion 190 are made of foam. The flow guiding component 150 and the first turbulence protrusion 190 can be integrally formed, which helps to simplify the production and assembly steps of the battery device 100 and improve the production efficiency of the battery device 100.

[0277] In some embodiments of this application, the battery device 100 further includes a second turbulence protrusion disposed on the partition assembly 130 and extending toward the flow channel space 140.

[0278] In the above technical solution, by setting a second turbulence protrusion extending toward the flow channel space 140 on the partition component 130, the flow direction of the heat exchange medium is changed, which is beneficial to increasing the Reynolds number of the heat exchange medium and improving the turbulence effect when the heat exchange medium flows in the flow channel space 140. This is beneficial to increasing the heat transfer coefficient of the heat exchange medium, improving the heat exchange effect of the heat exchange medium on the battery cell 120, and thus improving the temperature uniformity of the battery cell 120.

[0279] The housing 121 has partition components 130 on both sides in the third direction. The partition components 130 can work together with the housing 121 to define the flow channel space 140. The second turbulence protrusion can be set on the side of the partition component 130 facing the flow channel space 140 and extend into the flow channel space 140. When the heat exchange medium enters the flow channel space 140, the heat exchange medium can be disturbed by the second turbulence protrusion to improve the turbulence effect of the heat exchange medium.

[0280] The second turbulence protrusion can be integrally formed with the partition component 130, or the second turbulence protrusion can be connected to the partition component 130 by means of bonding or mechanical fixation. It is understood that the arrangement of the second turbulence protrusion and the partition component 130 can be determined according to actual production requirements, and no specific limitation is made here.

[0281] Referring to Figures 2, 3, 11, 20, 21, 26, 28, and 29, in some embodiments of this application, the housing 110 includes a first beam 114 and a second beam 115 arranged opposite to each other along a first direction. A receiving chamber 116 is formed between the first beam 114 and the second beam 115. A battery cell 120 is disposed in the receiving chamber 116. A flow channel space 140 is formed in the receiving chamber 116. The liquid inlet 143 and the liquid outlet 144 of the flow channel space 140 are disposed on the first beam 114 and / or the second beam 115.

[0282] In the above technical solution, a receiving chamber 116 is formed between the first beam 114 and the second beam 115 to facilitate the positioning and installation of the battery cell 120. The liquid inlet 143 and liquid outlet 144 of the flow channel space 140 are arranged on the first beam 114 and / or the second beam 115 to facilitate the flow of heat exchange medium into the flow channel space 140 in the receiving chamber 116.

[0283] The first beam 114 and the second beam 115 are spaced apart in a first direction, such that a receiving chamber 116 for housing the battery cell 120 can be formed between the first beam 114 and the second beam 115, and a flow channel space 140 is formed in the receiving chamber 116.

[0284] In some examples, the first beam 114 and the second beam 115 are respectively provided with an inlet 143 and an outlet 144 of the flow channel space 140 to facilitate the connection of the flow channel space 140 and thus facilitate the flow of the heat exchange medium. At the same time, since the first beam 114 and the second beam 115 are spaced apart in the first direction, by providing the inlet 143 and the outlet 144 of the flow channel space 140 on the first beam 114 and the second beam 115 respectively, it is beneficial to increase the distance between the inlet 143 and the outlet 144. This helps to reduce the risk of heat exchange between the heat exchange medium that has not been heat exchanged and the heat exchange medium that has been fully heat exchanged due to the close distance between the inlet 143 and the outlet 144, thereby improving the heat exchange effect of the heat exchange medium.

[0285] Multiple liquid inlets 143 and multiple liquid outlets 144 can be respectively provided on the first beam 114 and the second beam 115. The multiple liquid inlets 143 can be arranged one-to-one with the multiple liquid outlets 144 in the first direction, or the multiple liquid inlets 143 can be staggered between the multiple liquid outlets 144 in the first direction. The heat exchange medium enters the flow channel space 140 from the liquid inlet 143 and exchanges heat with the battery cell 120, and then can be discharged from the flow channel space 140 through the liquid outlet 144.

[0286] In some examples, the inlet 143 and the outlet 144 can both be located on the first beam 114, or the inlet 143 and the outlet 144 can both be located on the second beam 115, so as to facilitate the processing of the housing 110.

[0287] It is understandable that the positions of the inlet 143 and the outlet 144 can be determined according to actual production requirements, and no specific restrictions are made here.

[0288] In some embodiments of this application, the inlet 143 and outlet 144 of the flow channel space 140 are respectively located on the first beam 114 and the second beam 115, and both the outlet 144 and the inlet 143 are located at the top of the flow channel space 140; or, referring to Figures 12 to 25, one of the outlet 144 and the inlet 143 is located at the top of the flow channel space 140 and the other is located at the bottom of the flow channel space 140.

[0289] The above technical solution is beneficial to increasing the heat exchange area between the heat exchange medium and the battery cell 120, thereby enabling sufficient heat exchange between the heat exchange medium and the battery cell 120, improving the heat exchange effect of the heat exchange medium on the battery cell 120, and thus improving the temperature uniformity of the battery cell 120.

[0290] The inlet 143 and the outlet 144 are respectively located on the first beam 114 and the second beam 115. Since the first beam 114 and the second beam 115 are spaced apart in the first direction, by setting the inlet 143 and the outlet 144 of the flow channel space 140 on the first beam 114 and the second beam 115 respectively, it is beneficial to increase the distance between the inlet 143 and the outlet 144. This helps to reduce the risk of heat exchange between the heat exchange medium that has not been heat exchanged and the heat exchange medium that has been fully heat exchanged due to the close distance between the inlet 143 and the outlet 144, thereby improving the heat exchange effect of the heat exchange medium.

[0291] The flow channel space 140 has an inlet 143 and an outlet 144 respectively provided on two opposite side walls in the first direction, and both the outlet 144 and the inlet 143 are located at the top of the flow channel space 140. When the heat exchange medium enters the flow channel space 140 from the inlet 143, the heat exchange medium can flow fully in the flow channel space 140 under the action of the aforementioned flow guiding component 150 and then flow to the outlet 144, and be discharged from the flow channel space 140 through the outlet 144; or, if the flow channel space 140 is not provided with the flow guiding component 150, the heat exchange medium can be discharged from the flow channel space 140 when the liquid level in the flow channel space 140 reaches the outlet 144, so that the heat exchange medium can fully exchange heat with the battery cell 120.

[0292] In other examples, the flow channel space 140 is provided with an inlet 143 and an outlet 144 on two opposite sidewalls in the first direction, respectively. The inlet 143 can be located at the top of the flow channel space 140, and the outlet 144 can be located at the bottom of the flow channel space 140. After the heat exchange medium enters the flow channel space 140 through the inlet 143, it can flow towards the outlet 144 under the action of gravity, which is beneficial to improving the flow efficiency of the heat exchange medium. Alternatively, the inlet 143 can be located at the bottom of the flow channel space 140, and the outlet 144 can be located at the top of the flow channel space 140. When the liquid level of the heat exchange medium enters the flow channel space 140 through the inlet 143 reaches the outlet 144, it can be discharged from the flow channel space 140, so that the heat exchange medium can fully exchange heat with the battery cell 120.

[0293] Referring to Figures 14 and 15, in some other embodiments of this application, the inlet 143 and outlet 144 of the flow channel space 140 are disposed on adjacent sidewalls of the flow channel space 140, and the inlet 143 and outlet 144 can be separated by the flow guiding assembly 150.

[0294] In the above technical solution, by setting the liquid inlet 143 and the liquid outlet 144 on the adjacent sidewalls of the flow channel space 140, the processing of the liquid inlet 143 and the liquid outlet 144 is facilitated. The liquid inlet 143 and the liquid outlet 144 are separated by the flow guiding component 150, so as to extend the flow path of the heat exchange medium in the flow channel space 140, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0295] The inlet 143 can be provided on a side wall of the flow channel space 140 in the first direction. For example, the inlet 143 can be provided on the second beam 115 on which the inlet cavity a is formed. The outlet 144 can be provided on a side wall of the flow channel space 140 in the third direction. For example, the outlet 144 can be provided on the bottom plate 113. The inlet 143 and the outlet 144 are arranged relatively close to each other. The flow guiding assembly 150 can define a flow guiding path 160 with multiple bends 151 in the flow channel space 140.

[0296] It is understandable that the positions of the liquid outlet 144 and the liquid inlet 143 can also be other. The positions of the liquid outlet 144 and the liquid inlet 143 can be determined according to actual production requirements, and no specific restrictions are made here.

[0297] Referring to Figures 11 to 20, in some embodiments of this application, both the first beam 114 and the second beam 115 are provided with a first cavity 117. The first cavity 117 of the first beam 114 is provided with a liquid outlet cavity 1172, and the first cavity 117 of the second beam 115 is provided with a liquid inlet cavity 1171. The liquid inlet 143 of each flow channel space 140 is connected to the corresponding liquid inlet cavity 1171, and the liquid outlet 144 of the flow channel space 140 is connected to the corresponding liquid outlet cavity 1172.

[0298] In the above technical solution, the flow channel space 140 can be connected to the external space through the first beam 114 and the second beam 115, eliminating the need to set up additional pipes on the housing 110 to connect the flow channel space 140 and the external space. This simplifies the component arrangement of the battery device 100 and facilitates the orderly flow of the heat exchange medium, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange medium.

[0299] The housing 110 may include two first beams 114 spaced apart along a first direction. Each first beam 114 is provided with a first cavity 117 extending along a second direction. A second beam 115 extending along the second direction is provided between the two first beams 114. The second beam 115 and the two first beams 114 together define two receiving chambers 116 arranged along the first direction and extending along the second direction. Each receiving chamber 116 may be provided with a row of battery cells 120 arranged sequentially along the second direction. Multiple battery cells 120 arranged sequentially along the second direction are defined as a group of battery cells. Each group of battery cells is provided with a flow channel space 140.

[0300] Each first beam 114 has a first cavity 117 which may have an outlet cavity 1172 extending in the second direction. Each outlet cavity 1172 may be connected to the outlet 144 of the flow channel space 140 corresponding to the adjacent set of battery cells. The second beam 115 has a first cavity 117 which may have an inlet cavity 1171 extending in the second direction. The inlet cavity 1171 may be connected to the inlet 143 of the flow channel space 140 corresponding to the two sets of battery cells.

[0301] It is understood that the liquid inlet cavity 1171 and the liquid outlet cavity 1172 may have other arrangements, which are not specifically limited here.

[0302] In some embodiments of this application, the liquid inlet 143 may be located at the bottom of the liquid inlet cavity 1171. When the heat exchange medium enters the liquid inlet cavity 1171, the heat exchange medium can flow into the bottom of the liquid inlet cavity 1171 under its own gravity. By arranging the liquid inlet 143 at the bottom of the liquid inlet cavity 1171, the heat exchange medium can flow into the flow channel space 140 through the liquid inlet 143. This helps to shorten the flow path of the heat exchange medium when it flows from the liquid inlet cavity 1171 into the flow channel space 140, thereby improving the heat exchange efficiency between the heat exchange medium and the battery cell 120.

[0303] Referring to Figures 11 to 20, in some embodiments of this application, there are multiple first beams 114, and a second beam 115 is provided between two adjacent first beams 114, or there are multiple second beams 115, and a first beam 114 is provided between two adjacent second beams 115.

[0304] In the above technical solution, the heat exchange medium flows into the flow channel space 140 of different receiving chambers 116 respectively, which facilitates the simultaneous heat exchange of battery cells 120 in different receiving chambers 116. This is beneficial to improving the heat exchange efficiency of the heat exchange medium to the battery cells 120, thereby improving the working performance of the battery cells 120. It is also beneficial to realize the staggered arrangement of the liquid inlet cavity 1171 and the liquid outlet cavity 1172, so that the flow channel space 140 of adjacent receiving chambers 116 in the first direction can share the same liquid inlet cavity 1171 or liquid outlet cavity 1172. This is beneficial to simplify the structure of the battery device 100, improve the processing and production efficiency of the battery device 100, and reduce the production cost of the battery device 100.

[0305] Referring to Figures 12 to 20, the housing 110 includes four first beams 114, which are spaced apart in a first direction and extend along a second direction. The housing 110 also includes three second beams 115, with one second beam 115 between every two adjacent first beams 114. The four first beams 114 and the three second beams 115 together define six receiving chambers 116 that are arranged sequentially in the first direction and extend along the second direction. Each receiving chamber 116 contains a row of battery cells 120 arranged sequentially in the second direction. A row of multiple battery cells 120 arranged in the second direction is defined as a group of battery cells. Each group of battery cells is provided with a corresponding flow channel space 140. The liquid inlet cavity 1171 and the liquid outlet cavity 1172 both extend along the second direction.

[0306] Each group of battery cells arranged sequentially from left to right along a first direction is defined as a first battery cell group, a second battery cell group, a third battery cell group, a fourth battery cell group, a fifth battery cell group, and a sixth battery cell group. A first cavity 117 located on the second beam 115 between the first and second battery cell groups along the first direction is provided with a liquid inlet cavity 1171. A first cavity 117 located on either side of the first and second battery cell groups along the first direction is provided with a liquid outlet cavity 1172. The liquid inlet 143 of the flow channel space 140 corresponding to the first and second battery cell groups are connected to the liquid inlet cavity 1171. The liquid outlet 144 of the flow channel space 140 corresponding to the first battery cell group is connected to the liquid outlet cavity 1172 located to its left, and the liquid outlet 144 of the flow channel space 140 corresponding to the second battery cell group is connected to the liquid outlet cavity 1172 located to its right.

[0307] The second and third battery cell groups can share the same first beam 114. That is, the liquid outlet cavity 1172 located on the right side of the second battery cell group can communicate with the liquid outlet 144 of the corresponding flow channel space 140 of the third battery cell group. In the first direction, the first cavity 117 of the second beam 115 located between the third and fourth battery cell groups is provided with a liquid inlet cavity 1171, and the first cavity 117 of the first beam 114 located between the fourth and fifth battery cell groups is provided with a liquid outlet cavity 1172. The liquid inlet 143 of the flow channel space 140 corresponding to the third battery cell group and the liquid inlet 143 of the flow channel space 140 corresponding to the fourth battery cell group can be connected to the liquid inlet cavity 1171 located between them. The liquid outlet 144 of the flow channel space 140 corresponding to the fourth battery cell group can be connected to the liquid outlet cavity 1172 provided in the first beam 114 located between the fourth battery cell group and the fifth battery cell group. The liquid outlet cavity 1172 is also connected to the liquid outlet 144 of the flow channel space 140 corresponding to the fifth battery cell group.

[0308] The first cavity 117 of the second beam 115 between the fifth and sixth battery cell groups is provided with a liquid inlet cavity 1171. The liquid inlets 143 of the flow channel spaces 140 corresponding to the fifth and sixth battery cell groups are respectively connected to the liquid inlet cavity 1171 located between them. In the first direction, the side of the sixth battery cell group away from the fifth battery cell group is provided with a first beam 114. The first cavity 117 of the first beam 114 is provided with a liquid outlet cavity 1172. The liquid outlets 144 of the flow channel spaces 140 corresponding to the sixth battery cell group are all connected to the liquid outlet cavity 1172.

[0309] It is understood that the above arrangement of the liquid inlet cavity 1171 and the liquid outlet cavity 1172 is only an example of this application and should not be construed as a limitation of this application. The specific arrangement of the liquid inlet cavity 1171 and the liquid outlet cavity 1172 can be determined according to actual production requirements and is not specifically limited here.

[0310] Referring to Figures 3 to 5 and Figures 12 to 19, in some embodiments of this application, the liquid inlet cavity 1171 includes a liquid inlet cavity a and an isolation cavity b. In a first direction, the isolation cavity b is located on the side of the liquid inlet cavity a facing the flow channel space 140. The liquid inlet cavity a is connected to the isolation cavity b through a first diversion port c, and the liquid inlet port 143 is connected to the isolation cavity b.

[0311] In the above technical solution, by making the liquid inlet cavity 1171 include a liquid inlet cavity a and an isolation cavity b, and making the isolation cavity b located on the side of the liquid inlet cavity a facing the flow channel space 140, the liquid inlet cavity a and the flow channel space 140 are separated by the isolation cavity b. In this way, when the heat exchange medium enters the liquid inlet cavity a through the inlet port, the influence of the heat in the flow channel space 140 on the heat exchange medium in the liquid inlet cavity a can be reduced, and the possibility of a temperature gradient appearing in the heat exchange medium before contacting the battery cell 120 can be reduced, thereby improving the temperature uniformity of the heat exchange medium. When the heat exchange medium enters the isolation cavity b through the first branch port c and further enters the flow channel space 140 through the liquid inlet port 143, the temperature uniformity of the heat exchange medium entering the flow channel space 140 can be improved, thereby enabling the heat exchange medium to uniformly exchange heat with the battery cell 120 in the flow channel space 140, and thus improving the temperature uniformity of the battery device 100.

[0312] The first diversion port c and the liquid inlet 143 can be located on different side walls of the isolation chamber b. For example, the isolation chamber b includes a first wall that can separate the isolation chamber b from the liquid inlet chamber a. The first diversion port c can be disposed on the first wall and can penetrate the first wall in the thickness direction to connect the isolation chamber b and the liquid inlet chamber a, so that the heat exchange medium in the liquid inlet chamber a can enter the isolation chamber b through the first diversion port c.

[0313] The isolation chamber b also includes a second wall, which can also be understood as one side wall of the liquid inlet cavity 1171. The second wall can separate the flow channel space 140 and the isolation chamber b. The liquid inlet 143 can be set on the second wall, and the liquid inlet 143 can be set through the second wall in the thickness direction to connect the isolation chamber b and the flow channel space 140, so that the heat exchange medium in the isolation chamber b can enter the flow channel space 140 through the liquid inlet 143.

[0314] The heat exchange medium is suitable to enter the liquid inlet chamber a through the inlet port, the heat exchange medium in the liquid inlet chamber a is suitable to enter the isolation chamber b through the first diversion port c, and the heat exchange medium in the isolation chamber b is suitable to enter the flow channel space 140 through the liquid inlet 143, so as to use the heat exchange medium to exchange heat with the battery cell 120 in the flow channel space 140, thereby regulating the temperature of the battery cell 120.

[0315] Specifically, when the liquid level of the heat exchange medium in the inlet chamber a is higher than that in the first branch port c, the heat exchange medium can enter the isolation chamber b through the first branch port c. When the liquid level of the heat exchange medium in the isolation chamber b is higher than that inlet port 143, the heat exchange medium enters the flow channel space 140 through the inlet port 143.

[0316] Referring to Figures 3 to 5, 21, 24 and 25, in some embodiments of this application, in the first direction, the first diversion port c and the liquid inlet 143 are staggered; and / or, the first diversion port c is located in the middle of the isolation chamber b, and the liquid inlet is located at the bottom of the isolation chamber b; and / or, the opening area of ​​the liquid inlet 143 is larger than the opening area of ​​the first diversion port c; and / or in the first direction, isolation chambers b are provided on both sides of the liquid inlet chamber a.

[0317] In the above technical solution, by staggering the first diversion port c and the liquid inlet 143 in the first direction, it is beneficial to allow the heat exchange medium to remain in the isolation chamber b, thereby improving the heat insulation effect in the isolation chamber b, reducing the influence of heat in the flow channel space 140 on the heat exchange medium, and improving the overall strength of the plate (i.e., the first beam 114 or the second beam 115) with the liquid inlet cavity 1171. Specifically, since drilling holes in the plate would reduce its structural strength, the holes are staggered to ensure structural strength while drilling. By placing the first branch port c in the middle of the isolation chamber b, the heat exchange medium only enters the isolation chamber b when its level in the inlet chamber a exceeds the first branch port c. This allows the inlet chamber a to store a portion of the heat exchange medium, facilitating the rapid entry of a large amount of heat exchange medium into the flow channel space 140. This enables rapid heat exchange between multiple battery cells 120 and reduces the possibility of a temperature gradient before contact between the heat exchange medium and the battery cells 120. Furthermore, by making the opening area of ​​the inlet port 143 larger than the opening area of ​​the first branch port c, the heat exchange medium in the isolation chamber b can... The heat exchange medium can quickly enter the flow channel space 140 to control the residence time of the heat exchange medium in the isolation chamber b, reduce the influence of the heat in the flow channel space 140 on the heat exchange medium in the isolation chamber b, and reduce the possibility of a temperature gradient before the heat exchange medium exchanges heat with the battery cell 120. By setting isolation chambers b on both sides of the liquid inlet cavity a, the two isolation chambers b can be used to separate the liquid inlet cavity a and the flow channel space 140 located on both sides of the liquid inlet cavity a in the first direction, thereby effectively reducing the influence of the heat in the flow channel space 140 located on both sides of the liquid inlet cavity a on the heat exchange medium in the liquid inlet cavity a, reducing the possibility of a temperature gradient before the cooling heat exchange medium exchanges heat with the battery cell 120, and improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0318] In some examples, the first diversion port c and the inlet port 143 can be disposed on different sidewalls of the isolation chamber b to achieve a staggered arrangement of the first diversion port c and the inlet port 143 in the first direction, which is beneficial to improving the structural strength of the plate. For example, the first diversion port c and the inlet port 143 are respectively disposed on two opposite sidewalls of the isolation chamber b along the first direction, and the first diversion port c and the inlet port 143 are arranged at intervals in the second direction, for example, the first diversion port c is located to the left of the inlet port 143 along the second direction. Alternatively, the first diversion port c and the liquid inlet 143 are respectively disposed on two opposite side walls of the isolation chamber b along the first direction, and the first diversion port c and the liquid inlet 143 are arranged at intervals in the third direction. For example, one of the first diversion port c and the liquid inlet 143 is located at the bottom of the isolation chamber b, and the other of the first diversion port c and the liquid inlet 143 is located at the top of the isolation chamber b. This is beneficial to reduce the direct outflow of the heat exchange medium through the liquid inlet 143 after it enters the isolation chamber b through the first diversion port c, thereby making the heat exchange medium stay in the isolation chamber b, and thus improving the heat insulation effect in the isolation chamber b.

[0319] In some examples, the inlet 143 is positioned closer to the top of the isolation chamber b than the first branch port c. When the liquid level of the heat exchange medium in the isolation chamber b reaches the inlet 143, the heat exchange medium can be discharged from the isolation chamber b through the inlet 143, which helps to prolong the residence time of the heat exchange medium in the isolation chamber b, thereby improving the heat insulation effect in the isolation chamber b.

[0320] Referring to Figures 21 and 24, in some examples, the first diversion port c is located in the middle of the isolation chamber b, and the liquid inlet 143 is located at the bottom of the isolation chamber b.

[0321] It should be noted that "middle" refers to the middle position of the isolation chamber b in the third direction, and "bottom" refers to the position of the isolation chamber b near the bottom plate 113 in the third direction.

[0322] By placing the liquid inlet 143 at the bottom of the isolation chamber b and the first branch port c in the middle of the isolation chamber, the isolation chamber b can retain the heat exchange medium and allow the heat exchange medium entering the isolation chamber b to quickly enter the flow channel space 140, thereby controlling the residence time of the heat exchange medium in the isolation chamber b. In other words, compared to the example where the liquid inlet 143 is placed closer to the top of the isolation chamber b than the first branch port c, by placing the liquid inlet 143 at the bottom of the isolation chamber b, it is not necessary to wait for the liquid level of the heat exchange medium in the isolation chamber b to reach the liquid inlet 143 before it can be discharged from the isolation chamber b. The residence time of the heat exchange medium in the isolation chamber b is shorter, which helps to reduce the impact of the heat in the flow channel space 140 on the heat exchange medium in the isolation chamber b, thereby helping to reduce the possibility of a temperature gradient before the heat exchange medium exchanges heat with the battery cell 120.

[0323] Referring to Figures 3, 7, 8, 24 and 25, in some examples, the opening area of ​​the inlet 143 is larger than the opening area of ​​the first diversion port c.

[0324] Since the isolation chamber b separates the liquid inlet chamber a and the flow channel space 140, the heat in the flow channel space 140 has a relatively small impact on the heat exchange medium located in the liquid inlet chamber a. However, since the isolation chamber b is adjacent to the flow channel space 140, if the heat exchange medium is stored in the isolation chamber b for a long time, it may cause the heat exchange medium to absorb some heat before exchanging heat with the battery cell 120. This means that the longer the heat exchange medium is stored in the isolation chamber b, the worse the heat exchange effect between the heat exchange medium and the battery cell 120 will be.

[0325] Therefore, by making the opening area of ​​the liquid inlet 143 larger than the opening area of ​​the first branch port c, the heat exchange medium in the isolation chamber b can quickly enter the flow channel space 140, shortening the time the heat exchange medium is stored in the isolation chamber b, thereby reducing the impact of the heat in the flow channel space 140 on the heat exchange medium in the isolation chamber b, which is beneficial to improving the heat exchange effect of the heat exchange medium.

[0326] The inlet 143 and the first diversion port c can be constructed as circular holes, elliptical holes or square holes, respectively. The specific shapes of the inlet 143 and the first diversion port c can be determined according to actual production requirements, and are not specifically limited here, as long as the opening area of ​​the inlet 143 is greater than the opening area of ​​the first diversion port c.

[0327] Referring to Figures 4, 5, 12 to 19, in some examples, in the first direction, isolation chambers b are provided on both sides of the liquid inlet chamber a.

[0328] Two partitions arranged at intervals along the first direction can be provided in the liquid inlet cavity 1171 to define the liquid inlet cavity 1171 into an isolation cavity b, a liquid inlet cavity a and an isolation cavity b arranged sequentially along the first direction. The isolation cavities b on both sides of the liquid inlet cavity a can respectively separate the liquid inlet cavity a from the flow channel space 140 located on both sides thereon, so as to reduce the influence of the heat in the flow channel space 140 on the heat exchange medium in the liquid inlet cavity a.

[0329] Among them, "in the first direction, the first diversion port c and the liquid inlet 143 are staggered" is defined as condition A1, "the first diversion port c is located in the middle of the isolation chamber b and the liquid inlet 143 is located at the bottom of the isolation chamber b" is defined as condition A2, "the opening area of ​​the liquid inlet 143 is greater than the opening area of ​​the first diversion port c" is defined as condition A3, and "in the first direction, the liquid inlet chamber a is provided with isolation chambers b on both sides" is defined as condition A4. The battery device 100 can satisfy at least one of conditions A1-A4 to improve the heat exchange effect of the heat exchange medium.

[0330] It is understandable that the specific conditions for the battery device 100 to meet can be determined according to actual production requirements, and no specific limitations are made here.

[0331] Referring to Figures 12 to 20, in some embodiments of this application, the receiving chamber 116 is provided with a plurality of battery cells 120 arranged along a second direction, a first gap 141 is provided between adjacent battery cells 120 along the second direction, and a second gap 142 is provided between the battery cells 120 and the first beam 114 and / or the second beam 115 along the first direction. The first gap 141 and the second gap 142 are interconnected and form a flow channel space 140, and the second direction intersects the first direction.

[0332] In the above technical solution, by providing a first gap 141 between adjacent battery cells 120 along the second direction, the heat exchange medium can flow into the adjacent battery cells 120, thereby facilitating heat exchange between the heat exchange medium and the battery cells 120. Furthermore, after the heat exchange medium flows into the first gap 141, it can exchange heat with the adjacent battery cells 120 respectively, which helps to improve the heat exchange efficiency and effect of the heat exchange medium on the battery cells 120. By providing a second gap 142 between the battery cells 120 and the second beam 115 and / or the first beam 114, and the second gap 142 being interconnected with the first gap 141, the heat exchange medium can flow into the space between the battery cells 120 and the second beam 115 and / or the first beam 114, thereby facilitating heat exchange between the heat exchange medium and the battery cells 120. This allows the heat exchange medium to exchange heat on different side surfaces of the battery cells 120, which helps to increase the heat exchange area of ​​the battery cells 120, thereby improving the heat exchange efficiency and effect of the heat exchange medium on the battery cells 120.

[0333] Multiple battery cells 120 can be arranged at intervals along the second direction so that a first gap 141 can be defined between the housings 121 of adjacent battery cells 120. The first gap 141 extends along the first direction to connect with the liquid inlet cavity 1171 and the liquid outlet cavity 1172 respectively. After the heat exchange medium enters the first gap 141, it exchanges heat with the battery cells 120 located on both sides of the first gap 141 in the second direction, and then can be discharged from the first gap 141 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0334] In some embodiments, a flow guiding component 150 is provided in the first gap 141. The flow guiding component 150 can define a flow guiding path 160 in the first gap 141 to change the flow direction of at least part of the heat exchange medium, so that the heat exchange medium can flow in a preset direction, which is beneficial to increase the heat exchange area between the heat exchange medium and the battery cell 120, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0335] In some embodiments, the separator 130 can seal the first gap 141 on both sides in the third direction, which helps to improve the sealing performance of the first gap 141 and reduce the risk of leakage of the first gap 141.

[0336] In the first direction, the second beam 115 is disposed on one side of the battery cell 120. The side of the battery cell 120 opposite to the second beam 115 in the first direction is spaced apart from the second beam 115, so that a second gap 142 can be formed between the battery cell 120 and the second beam 115. The second gap 142 can be connected to the first gap 141, the liquid inlet cavity 1171 and the liquid outlet cavity 1172 respectively. After the heat exchange medium enters the second gap 142, it exchanges heat with the battery cell 120, and then it can be discharged from the second gap 142 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0337] In the first direction, the first beam 114 is disposed on one side of the battery cell 120. The side of the battery cell 120 opposite to the first beam 114 in the first direction is spaced apart from the first beam 114, so that a second gap 142 can be formed between the battery cell 120 and the first beam 114. The second gap 142 can be connected to the liquid inlet cavity 1171 and the liquid outlet cavity 1172 respectively. After the heat exchange medium enters the second gap 142, it exchanges heat with the battery cell 120, and then it can be discharged from the second gap 142 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0338] In some examples, in the first direction, the first beam 114 and the second beam 115 are respectively located on both sides of the battery cell 120. The battery cell 120 is spaced apart from the first beam 114 and the second beam 115, so that a second gap 142 is formed between the battery cell 120 and both the second beam 115 and the first beam 114. The second gap 142 can be connected to the liquid inlet cavity 1171 and the liquid outlet cavity 1172, respectively. After the heat exchange medium enters the second gap 142, it can exchange heat with the battery cell 120, and then it can be discharged from the second gap 142 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0339] Since the first gap 141 and the second gap 142 corresponding to each battery cell 120 are connected and form a flow channel space 140, the heat exchange medium can flow between the first gap 141 and the second gap 142 corresponding to each battery cell 120 by sharing the same liquid inlet 143 and the same liquid outlet 144. This is beneficial to simplifying the setting of the liquid inlet 143 and the liquid outlet 144 in the battery device 100.

[0340] In some embodiments, a flow guiding component 150 is provided in the second gap 142. The flow guiding component 150 can define a flow guiding path 160 in the second gap 142 to change the flow direction of at least part of the heat exchange medium, so that the heat exchange medium can flow in a preset direction, which is beneficial to increase the heat exchange area between the heat exchange medium and the battery cell 120, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0341] In some embodiments, the separator 130 can seal the second gap 142 on both sides in the third direction, which helps to improve the sealing performance of the second gap 142 and reduce the risk of leakage of the second gap 142.

[0342] Referring to Figures 2 to 4 and Figure 28, in some embodiments of this application, the receiving chamber 116 is provided with multiple rows of battery cell groups arranged along a first direction. Each row of battery cell groups includes multiple battery cells 120 arranged along a second direction. A first gap 141 is provided between adjacent battery cells 120 along the second direction, and a second gap 142 is formed between adjacent battery cell groups along the first direction. And / or a second gap 142 is provided between the battery cell group and the first beam 114 and / or the second beam 115. The first gap 141 and the second gap 142 are interconnected and form a flow channel space 140. The second direction intersects the first direction.

[0343] In the above technical solution, by arranging multiple rows of battery cells along the first direction within the receiving chamber 116, the energy density of the battery device 100 is improved, and the structure of the housing 110 is simplified, achieving a lightweight design for the battery device 100. By providing a first gap 141 between adjacent battery cells 120 along the second direction, heat exchange medium can flow between adjacent battery cells 120, facilitating heat exchange between the battery cells 120. Furthermore, after the heat exchange medium flows into the first gap 141, it can exchange heat with adjacent battery cells 120 respectively, improving the heat exchange medium's ability to exchange heat with the adjacent cells 120. The heat exchange efficiency and effect of the battery cell 120 are improved by providing a second gap between adjacent battery cell groups along the first direction, and / or providing a second gap 142 between the battery cell group and the second beam 115 and / or the first beam 114. This facilitates the flow of the heat exchange medium between the battery cell 120 and the second beam 115 and / or the first beam 114, thereby enabling the heat exchange medium to exchange heat with the battery cell 120. This allows the heat exchange medium to exchange heat with different side surfaces of the battery cell 120, which helps to increase the heat exchange area of ​​the battery cell 120 and thus improves the heat exchange efficiency and effect of the heat exchange medium on the battery cell 120.

[0344] Multiple battery cells 120 can be arranged in an array within the housing 116, which helps to improve the compactness of the battery cells 120. This allows for an increase in the number of battery cells 120 within the limited space of the housing 110, thereby increasing the energy density of the battery device 100. It also helps to simplify the structure of the housing 110 and reduce the production cost of the housing 110.

[0345] A first gap 141 can be defined between the housings 121 of adjacent battery cells 120 along the second direction. The first gap 141 extends along the first direction to connect with the liquid inlet cavity 1171 and the liquid outlet cavity 1172 respectively. After the heat exchange medium enters the first gap 141, it exchanges heat with the battery cells 120 located on both sides of the first gap 141 in the second direction respectively, and then can be discharged from the first gap 141 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0346] In some embodiments, a flow guiding component 150 is provided in the first gap 141. The flow guiding component 150 can define a flow guiding path 160 in the first gap 141 to change the flow direction of at least part of the heat exchange medium, so that the heat exchange medium can flow in a preset direction, which is beneficial to increase the heat exchange area between the heat exchange medium and the battery cell 120, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 120.

[0347] In some embodiments, the separator 130 can seal the first gap 141 on both sides in the third direction, which helps to improve the sealing performance of the first gap 141 and reduce the risk of leakage of the first gap 141.

[0348] The adjacent battery cell groups in the receiving chamber 116 are spaced apart along the first direction to form a second gap 142 between them. The second gap 142 can be connected to the liquid inlet cavity 1171 and the liquid outlet cavity 1172 respectively. After the heat exchange medium enters the second gap 142 located between the adjacent battery cell groups, it can exchange heat with the adjacent battery cell groups respectively, and then it can be discharged from the second gap 142 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0349] Referring to Figures 2 to 4, in the first direction, a second beam 115 is provided on the side of the battery cell group located at one edge of the multi-row battery cell group arranged along the first direction, away from the other battery cell groups. For example, the receiving chamber 116 is provided with three rows of battery cell groups arranged sequentially along the first direction. The three battery cells 120 are defined as the first cell group, the second cell group, and the third cell group, respectively. The second beam 115 is located on the side of the first cell group away from the third cell group in the first direction and is spaced apart from the first cell group, so that a second gap 142 can be formed between the first cell group and the second beam 115. The second gap 142 can be connected to the liquid inlet cavity 1171 and the liquid outlet cavity 1172, respectively. After the heat exchange medium enters the second gap 142, it exchanges heat with the first cell group, and then it can be discharged from the second gap 142 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0350] In the first direction, a first beam 114 is provided on the side of the battery cell group located at one edge of the multi-row battery cell group arranged along the first direction, away from the other battery cell groups. For example, the receiving chamber 116 is provided with three rows of battery cell groups arranged sequentially along the first direction. The three rows of battery cell groups are defined as the first cell group, the second cell group, and the third cell group. The first beam 114 is provided on the side of the third cell group away from the first cell group in the first direction and is spaced apart from the third cell group, so that a second gap 142 can be formed between the third cell group and the first beam 114. The second gap 142 can be connected to the liquid inlet cavity 1171 and the liquid outlet cavity 1172 respectively. After the heat exchange medium enters the second gap 142, it exchanges heat with the third cell group, and then it can be discharged from the second gap 142 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0351] In some examples, a first beam 114 is provided on the side of the battery cell group located at one edge of the multi-row battery cell group arranged along the first direction, away from the other battery cell groups. A second beam 115 is provided on the side of the battery cell group located at the other edge of the multi-row battery cell group, away from the other battery cell groups. The battery cell groups are spaced apart from the first beam 114 and the second beam 115, so that a second gap 142 is formed between the battery cell group and both the second beam 115 and the first beam 114. The second gap 142 can be connected to the liquid inlet cavity 1171 and the liquid outlet cavity 1172, respectively. After the heat exchange medium enters the second gap 142, it can exchange heat with the battery cell 120, and then it can be discharged from the second gap 142 into the liquid outlet cavity 1172 through the liquid outlet 144.

[0352] Since the first gap 141 and the second gap 142 are interconnected and form a flow channel space 140, the heat exchange medium can flow between the first gap 141 and the second gap 142 corresponding to each battery cell 120 by sharing the same liquid inlet 143 and the same liquid outlet 144. This helps to simplify the setting of the liquid inlet 143 and the liquid outlet 144 in the battery device 100.

[0353] Referring to Figures 3 to 5, in some embodiments of this application, each first gap 141 is provided with an isolation chamber b, each isolation chamber b is connected to the corresponding first gap 141 through a liquid inlet 143, and each isolation chamber b is connected to the liquid inlet chamber a through a first diversion port c.

[0354] In the above technical solution, by providing an isolation chamber b for each first gap 141, the liquid inlet chamber a and the flow channel space 140 are fully separated, which helps to reduce the influence of heat in the flow channel space 140 on the heat exchange medium in the liquid inlet chamber a, solves the temperature gradient problem of the heat exchange medium, and helps to reduce the temperature difference of the heat exchange medium.

[0355] Multiple first gaps 141 are arranged sequentially along the second direction, and multiple isolation chambers b are arranged sequentially along the second direction and are configured one-to-one with the multiple first gaps 141. Each isolation chamber b is provided with a first diversion port c and a liquid inlet 143. The liquid inlet chamber a is connected to the isolation chamber b through the first diversion port c, so that the isolation chamber b can be connected to the first gaps 141 and the liquid inlet chamber a respectively. At the same time, each isolation chamber b can separate the first gap 141 and the liquid inlet chamber a connected to it, so as to reduce the influence of heat in the first gap 141 on the heat exchange medium in the liquid inlet chamber a, which is beneficial to reduce the temperature difference of the heat exchange medium.

[0356] Referring to Figures 3, 7, 21 and 24, in some embodiments of this application, both the inlet chamber a and the isolation chamber b are elongated strips extending along the second direction. The isolation chamber b is provided with a plurality of first diversion ports c and a plurality of inlet ports 143 arranged at intervals along the second direction.

[0357] In the above technical solution, by adapting the extension directions of the isolation chamber b and the liquid inlet chamber a to the arrangement direction of the multiple battery cells 120, when the heat exchange medium flows into the isolation chamber b through the multiple first diversion ports c, the heat exchange medium in each part of the liquid inlet chamber a in the second direction can be simultaneously delivered into the isolation chamber b. When the heat exchange medium flows into the flow channel space 140 through the multiple liquid inlets 143, the heat exchange medium in each part of the isolation chamber b in the second direction can simultaneously flow into the flow channel space 140. This helps to solve the temperature gradient problem of the heat exchange medium, reduce the temperature difference of the heat exchange medium, thereby improving the heat exchange uniformity of the heat exchange medium to the multiple battery cells 120, and also improving the processing convenience of the battery device 100.

[0358] Multiple battery cells 120 can be arranged in the receiving chamber 116 along the second direction, and a first gap 141 is provided between adjacent battery cells 120. Multiple liquid inlets 143 provided on the isolation chamber b can be respectively arranged in a one-to-one correspondence with multiple first gaps 141, which is beneficial to improve the smoothness of the flow of heat exchange medium in the isolation chamber b into the first gaps 141. The first diversion port c can be evenly spaced along the second direction, which is beneficial to improve the uniformity of the heat exchange medium flowing into the isolation chamber b.

[0359] Referring to Figures 3, 4, 11, 28 and 29, in some embodiments of this application, the receiving chamber 116 is provided with a plurality of battery cells 120 arranged along a first direction, and the first gap 141 between adjacent battery cells 120 along the first direction is interconnected.

[0360] In the above technical solution, by arranging the multiple battery cells 120 in the accommodating chamber 116 along the first direction and the second direction respectively, it is beneficial to simplify the structure and processing steps of the battery device 100, thereby reducing the production cost of the battery device 100. By making the first gap 141 between adjacent battery cells 120 along the first direction interconnected, the heat exchange medium can flow through the adjacent battery cells 120 along the first direction, which is beneficial to ensure that the heat exchange medium can fully exchange heat.

[0361] A group of battery cells 120 arranged sequentially along the second direction is defined as a battery cell group. The accommodating chamber 116 is provided with multiple groups of battery cell groups arranged along the first direction. Each group of battery cell groups includes multiple first gaps 141 arranged sequentially along the second direction. The first gaps 141 of adjacent battery cell groups are arranged opposite to each other in the first direction and are interconnected. The heat exchange medium in the isolation chamber b can flow preferentially to the first gap 141 of the adjacent battery cell group through the liquid inlet 143, and then flow along the first direction to the first gap 141 of another group of battery cell groups that is interconnected with the first gap 141.

[0362] Referring to Figures 3 to 5, in some embodiments of this application, the liquid inlet cavity 1171 is located in the middle of the first cavity 117 along the height direction.

[0363] It should be noted that "height direction" refers to the height direction of the battery device 100, which is perpendicular to the first and second directions. "Height direction" can also be understood as the third direction mentioned above. For a specific direction illustration, please refer to Figures 3 to 5.

[0364] In the above technical solution, by setting the liquid inlet cavity 1171 in the middle of the first cavity 117 in the height direction, it is beneficial to increase the pressure at the liquid inlet 143, thereby improving the flow efficiency of the heat exchange medium.

[0365] Specifically, compared to constructing the entire first cavity 117 as a liquid inlet cavity 1171, constructing the middle part of the first cavity 117 as a liquid inlet cavity 1171 in the height direction is beneficial to reducing the area of ​​the liquid inlet cavity 1171. This is beneficial to increasing the pressure when the heat exchange medium flows into the liquid inlet cavity 1171, and further beneficial to increasing the pressure when the heat exchange medium flows to the liquid inlet 143, thereby improving the flow efficiency of the heat exchange medium. This is beneficial to reducing the risk of low flow efficiency of the heat exchange medium due to insufficient pressure caused by an excessively large area of ​​the liquid inlet cavity 1171, thereby improving the heat exchange efficiency of the heat exchange medium to the battery cell 120.

[0366] Referring to Figures 12 to 19, in some embodiments of this application, the liquid outlet cavity 1172 is defined by the first cavity 117 as a whole.

[0367] In other words, the shape and size of the liquid outlet cavity 1172 are completely consistent with the shape and size of the first cavity 117, eliminating the need for additional structures to be processed within the first cavity 117 to define the liquid outlet cavity 1172, thus improving the processing convenience of the battery device 100.

[0368] In the above technical solution, by making the liquid outlet cavity 1172 integrally defined by the first cavity 117, it is beneficial to improve the processing convenience of the liquid outlet cavity 1172, thereby improving the production efficiency of the battery device 100 and reducing the processing cost of the battery device 100. At the same time, it is beneficial to improve the smoothness of the heat exchange medium when it is discharged through the liquid outlet cavity 1172.

[0369] Referring to Figures 3 and 4, in some other embodiments of this application, the liquid outlet cavity 1172 is disposed at the bottom of the first cavity 117. That is, the cross-sectional area of ​​the liquid outlet cavity 1172 is smaller than the cross-sectional area of ​​the first cavity 117. By reducing the cross-sectional area of ​​the liquid outlet cavity 1172, it is beneficial to increase the flow rate of the heat exchange medium when it is discharged from the liquid outlet cavity 1172, thereby improving the efficiency of heat exchange medium discharge.

[0370] In some embodiments of this application, the battery device 100 further includes a drive pump for driving the circulating flow of the heat exchange medium.

[0371] The assembly method of the battery device 100 according to an embodiment of this application is briefly described below.

[0372] Support member 131 and blocking assembly 133 are respectively disposed on the housing 121 of battery cell 120. Multiple battery cells 120 are arranged in a predetermined order and can be modularly installed with the second beam 115 in advance. Then, the module formed by multiple battery cells 120 and the second beam 115 is placed with the side with electrode terminals 122 facing down. Then, adhesive layer 134 is disposed on the adhesive surface 1331 of blocking assembly 133. The module with adhesive layer 134 is inverted in the box 110 by a clamping fixture. It can also be understood that the box 110 is inverted on the module, that is, the bottom plate 113 of the box 110 faces up. Then, the box 110 and the module installed in the box 110 are flipped so that the side with electrode terminals 122 faces up. The pressure is maintained for more than 1 minute. Then, sealing member 132 is disposed on the adhesive surface 1311 of support member 131 to achieve sealing of flow channel space 140.

[0373] The structure of the flow path 160 of several embodiments of this application is briefly described below, taking as an example that a plurality of receiving chambers 116 are formed in the housing 110 and each receiving chamber 116 is provided with a battery cell group consisting of a plurality of battery cells 120 arranged sequentially along the second direction. In this example, the flow channel space 140 in adjacent receiving chambers 116 shares the same liquid inlet chamber a or the same liquid outlet cavity 1172.

[0374] Referring to Figures 12 and 13, the following description is given using two receiving chambers 116 sharing the same inlet chamber a in the flow channel space 140 of multiple receiving chambers 116 as an example. The inlets 143 of the flow channel spaces 140 of two adjacent receiving chambers 116 are arranged opposite each other in the first direction and are both located at the bottom of the flow channel space 140. The outlet 144 of the flow channel space 140 of the receiving chamber 116 arranged relatively to the left in the first direction is located on its left side and is located at the top of the flow channel space 140. The outlet 144 of the receiving chamber 116 arranged relatively to the right in the first direction is located on its right side and is located at the bottom of the flow channel space 140. The flow channel space 140 is provided with two first guide members 152, each including a first extension 1521 and a second extension 1522. The two first guide members 152 define a guide path 160 in the flow channel space 140.

[0375] The flow path 160 in the flow channel space 140 of the one of the two receiving chambers 116, which is located relatively to the left in the first direction, extends as follows: extending upward along the third direction - extending to the left along the first direction - extending downward along the third direction - extending to the right along the first direction - extending upward along the third direction - extending to the left along the first direction - extending upward along the third direction - extending to the right along the first direction - extending downward along the third direction - extending to the left along the first direction - extending upward along the third direction.

[0376] After the heat exchange medium in the liquid inlet cavity 1171 enters the flow channel space 140 through the liquid inlet 143, it flows along the aforementioned flow guide path 160 and flows to the liquid outlet 144, and then flows into the liquid outlet cavity 1172 through the liquid outlet 144.

[0377] The flow path 160 in the flow channel space 140 of the one of the two receiving chambers 116 located relatively to the right in the first direction extends as follows: extending upward along the third direction - extending to the right along the first direction - extending downward along the third direction - extending to the left along the first direction - extending upward along the third direction - extending to the right along the first direction - extending upward along the third direction - extending to the left along the first direction - extending downward along the third direction - extending to the right along the first direction.

[0378] After the heat exchange medium in the liquid inlet cavity 1171 enters the flow channel space 140 through the liquid inlet 143, it flows along the aforementioned flow guide path 160 and flows to the liquid outlet 144, and then flows into the liquid outlet cavity 1172 through the liquid outlet 144.

[0379] It is understood that the inlet 143 and outlet 144 of any two receiving chambers 116 that share the same inlet cavity a, as well as the flow path 160 in the flow channel space 140, can be extended in the same way as the above-mentioned flow path 160, and will not be described in detail here.

[0380] Referring to Figures 14 and 15, the following description is given using two receiving chambers 116 sharing the same inlet chamber a in the flow channel space 140 of multiple receiving chambers 116 as an example. The inlets 143 of the flow channel space 140 of the two adjacent receiving chambers 116 are arranged opposite each other in the first direction and located at the bottom of the flow channel space 140. The outlets 144 of the flow channel space 140 of the two receiving chambers 116 are arranged on the same side as the corresponding inlets 143 in the first direction, and the outlets 144 are provided on the bottom plate 113. Two first guide members 152 are provided in the flow channel space 140. One of the two first guide members 152 includes a first extension 1521 and a second extension 1522 arranged opposite each other. The other first guide member 152 is formed in an L shape. The two first guide members 152 define a guide path 160 in the flow channel space 140.

[0381] The extension direction of the flow path 160 in the flow channel space 140 of the one of the two receiving chambers 116 located relatively to the left in the first direction is as follows: extending upward along the third direction - extending to the left along the first direction - extending downward along the third direction - extending to the right along the first direction - extending upward along the third direction - extending to the left along the first direction - extending upward along the third direction - extending to the right along the first direction - extending downward along the third direction.

[0382] After the heat exchange medium in the liquid inlet cavity 1171 enters the flow channel space 140 through the liquid inlet 143, it flows along the aforementioned flow guide path 160 and flows to the liquid outlet 144, and then is discharged through the liquid outlet 144.

[0383] The extension direction of the flow path 160 in the flow channel space 140 of the one of the two receiving chambers 116 located relatively to the right in the first direction is as follows: extending upward along the third direction - extending to the right along the first direction - extending downward along the third direction - extending to the left along the first direction - extending upward along the third direction - extending to the right along the first direction - extending upward along the third direction - extending to the left along the first direction - extending downward along the third direction.

[0384] After the heat exchange medium in the liquid inlet cavity 1171 enters the flow channel space 140 through the liquid inlet 143, it flows along the aforementioned flow guide path 160 and flows to the liquid outlet 144, and then is discharged through the liquid outlet 144.

[0385] Referring to Figures 16 and 17, the following description is given using two accommodating chambers 116 sharing the same inlet chamber a in the flow channel space 140 of multiple accommodating chambers 116 as an example. The inlets 143 of the flow channel spaces 140 of two adjacent accommodating chambers 116 are arranged opposite each other in the first direction and are both located at the bottom of the flow channel space 140. The outlet 144 of the flow channel space 140 of the accommodating chamber 116 arranged relatively to the left in the first direction is located on its left side and is located at the top of the flow channel space 140. The outlet 144 of the accommodating chamber 116 arranged relatively to the right in the first direction is located on its right side and is located at the bottom of the flow channel space 140. The flow channel space 140 is provided with a second guide member 153, a third guide member 154 and a fourth guide member 155, respectively, and defines a guide path 160 including a total inlet flow path 162, a total outlet flow path 163 and a branch flow path 161.

[0386] The extension direction of the flow path 160 in the flow channel space 140 of the one of the two receiving chambers 116 located relatively to the left in the first direction is as follows: the main inlet flow path 162 extends upward along the third direction, extends to the left along the first direction, and extends downward along the third direction; multiple branch flow paths 161 are arranged sequentially along the third direction and connected to the part of the main inlet flow path 162 extending downward along the third direction; the other end of the multiple branch flow paths 161 is connected to the main outlet flow path 163; the main outlet flow path 163 extends downward along the third direction, extends to the left along the first direction, and extends upward along the third direction.

[0387] After the heat exchange medium in the liquid inlet cavity 1171 enters the flow channel space 140 through the liquid inlet 143, it flows along the aforementioned flow guide path 160 and flows to the liquid outlet 144, and then is discharged into the liquid outlet cavity 1172 through the liquid outlet 144.

[0388] The extension direction of the flow path 160 in the flow channel space 140 of the one of the two receiving chambers 116 located relatively to the right in the first direction is as follows: the main inlet flow path 162 extends upward along the third direction, extends to the right along the first direction, and extends downward along the third direction; multiple branch flow paths 161 are arranged sequentially along the third direction and connected to the part of the main inlet flow path 162 extending downward along the third direction; the other end of the multiple branch flow paths 161 is connected to the main outlet flow path 163; the main outlet flow path 163 extends downward along the third direction and extends to the right along the first direction.

[0389] After the heat exchange medium in the liquid inlet cavity 1171 enters the flow channel space 140 through the liquid inlet 143, it flows along the aforementioned flow guide path 160 and flows to the liquid outlet 144, and then is discharged into the liquid outlet cavity 1172 through the liquid outlet 144.

[0390] Referring to Figures 18 and 19, the following description takes two receiving chambers 116 sharing the same inlet chamber a in the flow channel space 140 of multiple receiving chambers 116 as an example. The inlets 143 of the flow channel spaces 140 of two adjacent receiving chambers 116 are arranged opposite each other in the first direction and are both located at the bottom of the flow channel space 140. Among them, the outlet 144 of the flow channel space 140 of the receiving chamber 116 arranged relatively to the left in the first direction is located on its left side and is located in the flow channel space. At the top of the space 140, the outlet 144 of the rightmost of the two receiving chambers 116 is located on its right side and at the bottom of the flow channel space 140. The flow channel space 140 is provided with a fifth guide member 156, a sixth guide member 157, a seventh guide member 158 and an eighth guide member 159, and defines a flow path 160 including two branch inlet flow channels 164, a central converging flow channel 180, three parallel branch flow paths 161 and a converging outlet flow path 170.

[0391] The extension direction of the guide path 160 in the flow channel space 140 of the one of the two receiving chambers 116, which is located relatively to the left in the first direction, is as follows: one of the two branch inlet channels 164 first extends upward along the third direction, then extends to the left along the first direction, and then extends downward along the third direction. Three parallel branch channels 161 can be spaced apart in the third direction and all extend along the first direction. The first ends of the multiple branch channels 161 can be connected to the portion of the branch inlet channel 164 extending downward along the third direction. The second ends of the multiple branch channels 161 are provided with a central converging channel 180. The extension of the central converging channel 180... The extension method can be: extending downward along a third direction - extending to the left along a first direction, wherein the portion of the central converging flow channel 180 extending downward along a third direction can be connected to the second end of multiple branch flow paths 161, and the portion of the central converging flow channel 180 extending to the left along the first direction can be connected to the converging outlet flow path 170 located on the left side of the flow channel space 140 in the first direction; another of the two branch inlet flow channels 164 is located near the bottom of the flow channel space 140, and its extension direction can be: first extending to the left along the first direction - extending upward along a third direction and connecting with the converging outlet flow path 170 located on the left side of the flow channel space 140 in the first direction.

[0392] After the heat exchange medium in the liquid inlet cavity 1171 enters the flow channel space 140 through the liquid inlet 143, it flows along the aforementioned flow guide path 160 and flows to the liquid outlet 144, and then is discharged into the liquid outlet cavity 1172 through the liquid outlet 144.

[0393] The extension direction of the flow path 160 in the flow channel space 140 of the one of the two receiving chambers 116, which is located relatively to the right in the first direction, is as follows: one of the two branch inlet flow channels 164 first extends upward along the third direction, then extends to the right along the first direction, and then extends downward along the third direction. Three parallel branch flow channels 161 can be spaced apart in the third direction and all extend along the first direction. The first ends of the multiple branch flow channels 161 can be connected to the portion of the branch inlet flow channel 164 extending downward along the third direction. The second ends of the multiple branch flow channels 161 are provided with a central converging flow channel 180. The extension of the central converging flow channel 180... The extension method can be: extending downward along a third direction - extending to the right along a first direction, wherein the portion of the central converging flow channel 180 extending downward along a third direction can be connected to the second end of multiple branch flow paths 161, and the portion of the central converging flow channel 180 extending to the right along the first direction can be connected to the converging outlet flow path 170 located on the right side of the flow channel space 140 in the first direction. Another of the two branch inlet flow channels 164 is located near the bottom of the flow channel space 140, and its extension direction can be: first extending to the right along the first direction - extending upward along a third direction and connecting with the converging outlet flow path 170 located on the right side of the flow channel space 140 in the first direction.

[0394] It should be noted that the battery device 100 described above can be configured as an energy storage device.

[0395] According to some embodiments of this application, this application also provides an electrical device 1000, including the battery device 100 described above, the battery device 100 being used to store or provide electrical energy.

[0396] In the above technical solution, since the power device 1000 includes the battery device 100, it is beneficial to improve the service life and safety of the power device 1000.

[0397] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0398] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, wherein, include: Box; A battery cell, wherein the battery cell is disposed within the housing, and the battery cell includes a housing and electrode terminals exposed outside the housing; A separation component is disposed within the housing and connected to the housing and the casing to separate a flow channel space and an electrical space within the housing. The flow channel space and the electrical space are isolated from each other. The electrode terminals are located within the electrical space. The casing is at least partially located within the flow channel space. The flow channel space is used for the flow of heat exchange medium. The heat exchange medium is in contact with the portion of the casing located within the flow channel space.

2. The battery device of claim 1, wherein, The housing includes multiple sidewalls, at least two of which participate in forming the flow channel space.

3. The battery device of claim 1, wherein, The housing includes an adjacent first sidewall and a second sidewall, wherein the first sidewall is the sidewall with the largest area in the housing, and the first sidewall and / or the second sidewall participate in forming the flow channel space.

4. The battery device of claim 3, wherein, The housing includes two first sidewalls and two second sidewalls arranged opposite to each other, the two first sidewalls and the two second sidewalls respectively participating in the formation of the flow channel space.

5. The battery device according to any one of claims 1-4, wherein, The battery cells are multiple and spaced apart within the housing, with at least a portion of the flow channel space between adjacent battery cells.

6. The battery device of claim 5, wherein, At least a portion of the separator is located in the gap between adjacent battery cells.

7. The battery device of claim 6, wherein, The separation component includes: A seal for sealing the gap between the housings of adjacent battery cells, and / or for sealing the gap between the housing and the enclosure.

8. The battery device of claim 7, wherein, The separation component also includes: A support member is provided on the outer periphery of the top of the housing and is used to support the seal member, which seals the support member and the housing.

9. The battery device of claim 8, wherein, The support members are multiple, and the multiple support members are correspondingly fitted onto the housings of the multiple battery cells, with the support members corresponding to adjacent battery cells being fixedly engaged; or The adjacent battery cells are fixedly connected to a portion of the same support member.

10. The battery device of claim 8, wherein, The support member is a first foam, and / or the thickness of the support member ranges from 2mm to 10mm.

11. The battery device of claim 7, wherein, The sealing element is a sealant.

12. The battery device of claim 8, wherein, The housing includes a sidewall and an end cap, the sidewall being arranged circumferentially around the end cap, and the end cap being provided with the electrode terminals; The support member has an adhesive coating surface on the side opposite to the flow channel space. The sealant is a sealant, which is located on the adhesive coating surface and is glued to the connection between the end cap and the side wall.

13. The battery device of claim 12, wherein, The minimum distance between the adhesive surface and the surface of the end cap facing away from the sidewall is in the range of 1mm-5mm.

14. The battery device of any one of claims 1-13, wherein, It also includes an adhesive layer, through which the end of the housing facing away from the electrode terminals is fixed to the bottom plate of the housing.

15. The battery device of claim 14, wherein, It also includes a blocking component, which is fitted onto the housing. The blocking component has an adhesive layer on the side facing the bottom plate of the housing, and the adhesive layer is fixed to the bottom plate.

16. The battery device of claim 15, wherein, The blocking component is a second foam, and / or the thickness of the blocking component ranges from 2mm to 10mm.

17. The battery device of claim 14, wherein, The base plate has a hollow, multi-layered structure.

18. The battery device of any one of claims 1-17, wherein, The housing includes a first beam and a second beam arranged opposite to each other along a first direction. A receiving chamber is formed between the first beam and the second beam. The receiving chamber contains the battery cell. The receiving chamber also contains a flow channel space. The inlet and outlet of the flow channel space are located on the first beam and / or the second beam.

19. The battery device of claim 18, wherein, The inlet and outlet of the flow channel space are respectively located on the first beam and the second beam. Both the liquid outlet and the liquid inlet are located at the top of the flow channel space; or One of the liquid outlet and the liquid inlet is located at the top of the flow channel space and the other is located at the bottom of the flow channel space.

20. The battery device of claim 18, wherein, The accommodating chamber contains a plurality of battery cells arranged along a second direction. A first gap is provided between adjacent battery cells along the second direction. A second gap is provided between the battery cells and the first beam and / or the second beam along the first direction. The first gap and the second gap are interconnected to form the flow channel space. The second direction intersects with the first direction.

21. The battery device of claim 18, wherein, The accommodating chamber is provided with multiple rows of battery cell groups arranged along a first direction. Each row of battery cell groups includes multiple battery cells arranged along a second direction. A first gap is provided between adjacent battery cells along the second direction, and a second gap is provided between adjacent battery cell groups along the first direction. And / or a second gap is provided between the battery cell group and the first beam and / or the second beam. The first gap and the second gap are interconnected to form the flow channel space. The second direction intersects with the first direction.

22. The battery device of any one of claims 18-21, wherein, Both the first beam and the second beam are provided with a first cavity. The first cavity of the first beam is provided with a liquid outlet cavity, and the first cavity of the second beam is provided with a liquid inlet cavity. The liquid inlet of each flow channel space is connected to the corresponding liquid inlet cavity, and the liquid outlet of each flow channel space is connected to the corresponding liquid outlet cavity.

23. The battery device of any one of claims 18-22, wherein, The first beam is provided in multiple ways, and a second beam is provided between two adjacent first beams, or the second beam is provided in multiple ways, and a first beam is provided between two adjacent second beams.

24. The battery device of claim 22, wherein, The liquid inlet cavity includes a liquid inlet body and an isolation cavity. In the first direction, the isolation cavity is located on the side of the liquid inlet body facing the flow channel space. The liquid inlet body is connected to the isolation cavity through a first diversion port, and the liquid inlet is connected to the isolation cavity.

25. The battery device of claim 24, wherein, In the first direction, the first diversion port and the inlet port are staggered; and / or, The first diversion port is located in the middle of the isolation chamber, and the liquid inlet is located at the bottom of the isolation chamber; and / or, The opening area of ​​the inlet is larger than the opening area of ​​the first diversion port; and / or, In the first direction, the isolation chamber is provided on both sides of the liquid inlet chamber.

26. The battery device of claim 24, wherein, Each of the first gaps is provided with a corresponding isolation chamber. Each isolation chamber is connected to the corresponding first gap through the liquid inlet and is connected to the liquid inlet body through the first diversion port.

27. The battery device of claim 24, wherein, Both the inlet chamber and the isolation chamber are elongated strips extending along the second direction. The isolation chamber is provided with a plurality of first diversion ports and a plurality of inlet ports arranged at intervals along the second direction.

28. The battery device of claim 24, wherein, The liquid inlet cavity is located at the middle of the first cavity along its height direction; and / or, The liquid outlet cavity is defined by the first cavity as a whole.

29. The battery device of any one of claims 1-28, wherein, It also includes a flow guiding component, which is disposed within the flow channel space and connected to the housing, for dividing the flow channel space to form a flow guiding path.

30. The battery device according to claim 29, wherein, The flow guiding component is configured to participate in forming the flow guiding path, which is connected to the inlet and outlet of the flow channel space, respectively, and the flow guiding path includes multiple branch paths, which are connected in series and / or in parallel.

31. The battery device of claim 29, wherein, The flow guiding component includes a plurality of first flow guiding elements, which cooperate to participate in forming the flow guiding path.

32. The battery device according to any one of claims 29-31, wherein, The flow guiding component is foam and is fixed to the housing.

33. The battery device according to any one of claims 29-32, wherein, It also includes a first turbulence protrusion, which is disposed on the flow guiding component and extends toward the flow guiding path.

34. The battery device according to claim 33, wherein, The first disturbance protrusion is multiple and spaced apart along the length of the flow guide path.

35. The battery device according to claim 34, wherein, The flow-guiding path is provided with the turbulence protrusions on its opposite sidewalls.

36. The battery device according to any one of claims 1-35, wherein, It also includes a second turbulence protrusion, which is disposed on the partition assembly and extends toward the flow channel space.

37. An electrical appliance, wherein, Includes a battery device according to any one of claims 1-36, the battery device being used to store or provide electrical energy.

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