Battery device and electric appliance

Abstract

The application discloses a battery device and an electric device. The battery device comprises: a battery cell assembly comprising a plurality of battery cells, the battery cell assembly having a height direction; and a heat management component comprising a plurality of heat exchange pieces arranged along a first direction, two adjacent heat exchange pieces being provided with a battery cell therebetween, each heat exchange piece comprising a heat exchange vertical plate and a heat exchange horizontal plate, both ends of the heat exchange vertical plate being connected with the heat exchange horizontal plates along the height direction of the battery cell assembly, the heat exchange vertical plate and the heat exchange horizontal plates extending along a second direction, the heat exchange horizontal plate at one end of the heat exchange vertical plate along the height direction being in heat conduction connection with the bottom of the battery cell, the heat exchange horizontal plate at the other end of the heat exchange vertical plate along the height direction being in heat conduction connection with the top of the battery cell, the heat exchange vertical plate being in heat conduction connection with one side of the battery cell along the first direction, the first direction intersecting the second direction, and the plane where the first direction and the second direction are located intersecting the height direction of the battery cell.

Description

Technical Field

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

[0002] Ambient temperature has a significant impact on batteries, especially lithium-ion batteries. Excessively high or low temperatures can easily degrade battery performance and shorten battery life. Current issues include batteries experiencing excessively high or low temperatures due to ambient temperature fluctuations or during fast charging. Summary of the Invention

[0003] In view of the above problems, this application provides a battery device and electrical equipment, which realizes three-sided heat exchange of battery cells by setting up heat exchange vertical plates and heat exchange horizontal plates, so as to improve the temperature regulation capability of heat exchange components for battery cells, thereby reducing the impact of ambient temperature and excessively high temperature during fast charging.

[0004] In a first aspect, this application provides a battery device, comprising:

[0005] A battery cell assembly comprises multiple battery cells, and the battery cell assembly has a height orientation;

[0006] A thermal management component includes multiple heat exchange elements arranged along a first direction. A battery cell is disposed between two adjacent heat exchange elements. Each heat exchange element includes a heat exchange vertical plate and a heat exchange horizontal plate. Along the height direction of the battery cell assembly, the two ends of the heat exchange vertical plate are respectively connected to the heat exchange horizontal plate. Both the heat exchange vertical plate and the heat exchange horizontal plate extend along a second direction. The heat exchange horizontal plate located at one end of the heat exchange vertical plate along the height direction is thermally connected to the bottom of the battery cell. The heat exchange horizontal plate located at the other end of the heat exchange vertical plate along the height direction is thermally connected to the top of the battery cell. The heat exchange vertical plate is thermally connected to one side of the battery cell along the first direction. The first direction and the second direction intersect. The plane where the first direction and the second direction are located intersects the height direction of the battery cell.

[0007] A heat exchanger is provided between the heat exchanger horizontal plate and the heat exchanger vertical plate that are thermally connected to the top of the battery cell. The heat exchanger horizontal plate located at the top of the battery cell is connected to the heat exchanger vertical plate through the heat exchanger. The heat exchanger is configured to introduce a heat exchange medium into the interior of at least one of the heat exchanger horizontal plate and the heat exchanger vertical plate.

[0008] The combination of heat exchange vertical and horizontal plates achieves three-sided thermal contact between the top, bottom, and sides of the battery cell, increasing the heat exchange area between the heat exchange components and the battery cell. This improves heat exchange efficiency and enhances the thermal management components' ability to regulate the battery cell temperature, reducing the impact of ambient temperature and fast-charging conditions on the battery cell and allowing it to operate within a suitable temperature range. Furthermore, the three-sided heat exchange of the battery cell by the vertical and horizontal plates improves temperature uniformity, reduces performance degradation caused by localized temperature unevenness, and extends battery life. Additionally, placing the current collector between the horizontal and vertical plates, compared to placing it at either end of the vertical plate along the second direction, allows the heat exchange medium to flow from the current collector from top to bottom within the vertical plate and / or from bottom to top into the horizontal plate, shortening the flow path and improving the supply and circulation efficiency of the heat exchange medium.

[0009] In some embodiments, the battery device further includes a housing with a receiving space, in which the battery cell assembly and the thermal management component are both disposed. The housing includes limiting beams, and the battery cell assembly is provided with limiting beams on both sides along the second direction. The limiting beams located on both sides of the battery cell assembly along the second direction are connected to the two ends of the heat exchange component.

[0010] By connecting the limiting beams on both sides of the battery cell assembly along the second direction to the two ends of the heat exchanger, the limiting beams and heat exchanger form an integral protective structure. This improves the structural strength and stiffness of the limiting beams and reduces their deformation under battery expansion force and external loads. Simultaneously, the heat exchanger provides multi-point support and constraint to the limiting beams, enhancing the overall structural stability of the enclosure and reducing deformation caused by battery expansion, temperature changes, or external impacts, thus extending the battery device's lifespan.

[0011] In some embodiments, along the height direction, at least one of the heat exchange cross plates located on both sides of the battery cell is connected one-to-one with the limiting beams located on both sides of the battery cell assembly along the second direction.

[0012] By directly connecting at least one end of the heat exchange cross plate on both sides of the battery cell to the limiting beams on both sides of the battery cell assembly along the second direction, compared with the structure of setting current collectors at both ends of the heat exchange plate, the direct bearing of the heat exchange medium flow channel sealing position on the battery expansion force can be reduced, thereby reducing the risk of sealing connection failure between the current collector and the heat exchange plate due to expansion force, effectively preventing heat exchange medium leakage, and improving the sealing reliability of thermal management components and the safety of battery device use.

[0013] In some embodiments, the battery cell includes two first sides arranged back to back along a second direction and two second sides arranged back to back along the first direction, the area of ​​the first side being larger than the area of ​​the second side, and the second side being thermally connected to a heat exchanger.

[0014] The battery cell uses its larger first side as the expansion force-bearing surface, while its smaller second side is thermally connected to the heat exchanger. This ensures that the main expansion force generated by the battery cell during charging and discharging acts on the first side, and is directly borne and absorbed by the limiting beams on both sides of the battery cell assembly along the second direction. This reduces the expansion force between adjacent battery cells on the heat exchanger, thus preventing the flow channels within the heat exchanger from being crushed due to excessive expansion force, thereby improving the reliability of the thermal management components. Furthermore, it fully utilizes the function of the limiting beams in absorbing expansion force, reducing damage to the casing caused by expansion force.

[0015] In some embodiments, the interior of the heat exchange vertical plate has a first heat exchange channel, and the interior of the heat exchange horizontal plate has a second heat exchange channel. The second heat exchange channel of at least one of the heat exchange horizontal plates located at both ends of the heat exchange vertical plate along the height direction is connected to the first heat exchange channel.

[0016] A first heat exchange channel is provided inside the heat exchange vertical plate, and a second heat exchange channel is provided inside the heat exchange horizontal plate. The second heat exchange channel located at least one end of the heat exchange vertical plate in the height direction is connected to the first heat exchange channel to realize the connection and integrated flow of the heat exchange channels. This allows the heat exchange medium to flow smoothly between the first and second heat exchange channels, forming a continuous heat exchange path. This is beneficial to improving the flow efficiency and heat exchange uniformity of the heat exchange medium, enhancing the ability to synchronously regulate the temperature of the top, bottom and sides of the battery cell, and simplifying the structure of the heat exchange components.

[0017] In some embodiments, the heat exchanger further includes a current collector, which is provided between the heat exchange horizontal plate and the heat exchange vertical plate that are thermally connected to the top of the battery cell. The heat exchange horizontal plate located at the top of the battery cell is connected to the heat exchange vertical plate through the current collector. The current collector has a current collection channel, and the second heat exchange channel of the heat exchange horizontal plate located at the top of the battery cell is connected to the first heat exchange channel through the current collection channel.

[0018] By setting up the flow collection channel of the heat exchanger, the heat exchange medium can be split into upper and lower flows through the heat exchanger, and the heat exchange medium can be supplied to the heat exchange vertical plate and the heat exchange horizontal plate simultaneously. This effectively shortens the overall flow path of the heat exchange medium, reduces flow resistance, and improves the supply and circulation efficiency of the heat exchange medium, which is conducive to enhancing the heat exchange uniformity of the heat exchange components to the battery cells.

[0019] In some embodiments, the current collection channel includes a first current collection cavity and a second current collection cavity spaced apart along a first direction, and the first heat exchange channel includes a first chamber and a second chamber spaced apart along a second direction. The second heat exchange channel of the heat exchange horizontal plate located on top of the battery cell is connected to the first chamber through the first current collection cavity and to the second chamber through the second current collection cavity.

[0020] The first heat exchanger cavity connects the second heat exchange channel of the top heat exchanger plate to the first chamber, and the second heat exchanger cavity connects the second heat exchange channel of the top heat exchanger plate to the second chamber, achieving multi-path distribution and supply of the heat exchange medium. This structure can improve the uniformity of heat exchange medium distribution within the channels, reduce local flow resistance, shorten the path of the heat exchange medium into each heat exchange channel, and reduce local insufficient flow or temperature unevenness caused by uneven channel connectivity, thereby improving the heat exchange efficiency and temperature consistency of the heat exchange components for the battery cells.

[0021] In some embodiments, the second heat exchange channel of the heat exchange plate located at the bottom of the battery cell is connected to the first heat exchange channel.

[0022] By connecting the second heat exchange channel of the heat exchange plate located at the bottom of the battery cell to the first heat exchange channel, there is no need to set up a separate liquid supply, collection and sealing structure for the bottom heat exchange plate. This reduces the problems of increased piping, complex interfaces and difficult assembly caused by separate liquid supply, simplifies the overall structure of the thermal management components, facilitates assembly, and reduces the risk of sealing failure and heat exchange medium leakage caused by separate liquid supply structure, thereby improving the compactness and operational reliability of the battery device.

[0023] In some embodiments, the first heat exchange channel includes a first chamber and a second chamber spaced apart along a second direction, the first chamber and the second chamber being connected to the second heat exchange channel of the heat exchange cross plate located at the bottom of the battery cell.

[0024] The first heat exchange channel employs a first chamber and a second chamber spaced apart along a second direction. The first and second chambers are connected to the second heat exchange channel of the bottom heat exchange horizontal plate of the battery cell. This allows the heat exchange medium to be diverted and flow into the second heat exchange channel of the bottom heat exchange horizontal plate via the first chamber, and then converged and output via the second chamber. Compared to the method of connecting the first heat exchange channel and the second heat exchange channel of the bottom heat exchange horizontal plate in series, this shortens the path of the heat exchange medium into the second heat exchange channel, which is beneficial for improving the uniformity of heat exchange medium flow between the heat exchange vertical plate and the bottom heat exchange horizontal plate, reducing local flow resistance, optimizing the pressure distribution within the channel, and improving the heat exchange efficiency and temperature consistency of the heat exchange components for the battery cell.

[0025] In some embodiments, the heat exchange horizontal plate is provided with a flow divider and a flow combiner on the side facing the heat exchange vertical plate. The flow divider and the flow combiner are spaced apart along the second direction. In the same heat exchange horizontal plate, the flow divider is connected to the second heat exchange channel and the first chamber respectively, and the flow combiner is connected to the second heat exchange channel and the second chamber respectively.

[0026] By providing flow-diverting channels and flow-collecting channels spaced apart along a second direction on the side of the heat exchange horizontal plate facing the heat exchange vertical plate, the flow-diverting channels are connected to the second heat exchange channel and the first chamber, respectively, and the flow-collecting channels are connected to the second heat exchange channel and the second chamber, respectively. This achieves directional flow diversion and convergence of the heat exchange medium between the heat exchange vertical plate and the heat exchange horizontal plate, forming a stable and smooth flow path. This structure can shorten the flow path of the heat exchange medium between the first chamber and the second chamber and the second heat exchange channel, respectively, thereby reducing the flow resistance at the channel transition points.

[0027] In some embodiments, the heat exchange horizontal plate has an internal receiving cavity and a first support rib and a second support rib extending along a second direction, respectively. The first support rib and the second support rib are both disposed in the receiving cavity. A partial diversion groove and a partial confluence groove are formed on the first support rib. The second support rib is provided on at least one side of the first support rib along the first direction. The first support rib, the second support rib and the inner wall of the receiving cavity together define a second heat exchange flow channel.

[0028] The first and second support ribs improve the structural strength and rigidity of the heat exchange crossplate. On the one hand, this enhances the ability of the limiting beam to withstand the expansion of the battery cells; on the other hand, it reduces the risk of the second heat exchange channel being crushed and blocked due to excessive deformation of the heat exchange crossplate, thus improving the reliability of the heat exchange crossplate. Furthermore, the heat exchange channel extending in the second direction, formed by the first and second support ribs and the inner wall of the receiving cavity, lengthens the flow path of the heat exchange medium, thereby improving heat exchange efficiency.

[0029] In some embodiments, the two heat exchangers furthest apart along a first direction are defined as the first heat exchanger, and the heat exchanger between the two furthest apart along the first direction is defined as the second heat exchanger. In the first heat exchanger, a second support rib is provided on one side of the first support rib along the first direction, and the second support rib is located on the side of the heat exchange plate facing the battery cell. The second support rib located on the side of the first support rib along the first direction, together with the first support rib and a portion of the inner wall of the receiving cavity, defines a second heat exchange flow channel.

[0030] Since the first heat exchanger is located at the farthest position of the battery cell along the first direction, the heat exchanger plate of the first heat exchanger can only exchange heat with the battery cell on one side of the heat exchanger plate. Setting a second support rib on one side of the first support member along the first direction can satisfy both support and heat exchange requirements, while also reducing structural complexity.

[0031] In some embodiments, in the second heat exchanger, the second heat exchange channel includes a first branch channel and a second branch channel. The first support rib is provided with second support ribs on both sides along the first direction. The second support rib located on one side of the first support rib along the first direction, together with the first support rib and a portion of the inner wall of the receiving cavity, defines the first branch channel. The second support rib located on the other side of the first support rib along the first direction, together with the first support rib and another portion of the inner wall of the receiving cavity, defines the second branch channel. The flow divider is connected to the first branch channel and the second branch channel respectively.

[0032] The second heat exchange channel is separated into a first branch channel and a second branch channel by the first and second support ribs. The branch channel is simultaneously connected to both the first and second branch channels, allowing the branch channel to simultaneously supply heat exchange media with similar temperatures to both channels. This enables the same bottom heat exchange plate to simultaneously heat the bottoms of the battery cells located on both sides of its first direction via the two branch channels. This improves the consistency of heat absorption / dissipation at the bottoms of the battery cells on both sides of the heat exchange plate.

[0033] In some embodiments, the heat exchanger further includes a first sealing member. The heat exchange cross plate is provided with a first sealing member at both ends along the second direction. One first sealing member seals one end of the receiving cavity, and the other first sealing member seals the other end of the receiving cavity. The heat exchange cross plate has a third supporting rib inside. The first supporting rib is provided with a third supporting rib on at least one side along the first direction. The third supporting rib is located on one side of the second supporting rib and is connected to or abuts against one end of the second supporting rib. Along the second direction, the third supporting rib and the first sealing member located on the same side of the second supporting rib are spaced apart and divide the second heat exchange channel into a bent channel.

[0034] By incorporating a third supporting rib within the heat exchange crossplate, which works in conjunction with the second supporting rib and the first sealing element, a bent and extended second heat exchange channel is formed within the accommodating cavity. This extends the residence time and travel distance of the heat exchange medium within the second heat exchange channel, increasing the heat exchange contact time between the heat exchange medium and the heat exchange crossplate, thereby improving the sufficiency of heat exchange and temperature regulation at the bottom of the battery cell. Simultaneously, the third supporting rib provides reliable support for the second supporting rib and the second heat exchange channel, enhancing the overall structural strength and deformation resistance of the heat exchange crossplate, thus improving the flow stability of the bent channel and ultimately enhancing the reliability of the heat exchange components.

[0035] In some embodiments, the current collector further includes a first plug and a second plug. The first plug and the second plug are provided at both ends of the first current collector along the second direction. The first plug blocks the second current collector and has a first port connected to the first current collector. The second plug blocks the first current collector and has a second port connected to the second current collector.

[0036] The installation of the first and second plugs can reduce the probability of short circuits in the heat exchange medium on the current collector, so that the heat exchange medium can flow along the preset path, thereby enabling the heat exchange vertical plate and heat exchange horizontal plate to fully exert their respective functions and regulate the temperature of different sides of the battery cell.

[0037] In some embodiments, a battery cell includes electrode terminals, and a heat exchange plate is provided between the two closest electrode terminals of two adjacent battery cells along a first direction, and two adjacent battery cells along the first direction are thermally connected to the same heat exchange plate.

[0038] Two adjacent battery cells along the first direction are thermally connected to the same heat exchange plate. When the battery cell expands along the height direction, the top heat exchange plate can provide overall constraint and support for the battery cell, effectively improving the overall structural rigidity and stability of the battery cell assembly, suppressing excessive expansion and deformation of the battery cell in the height direction, and reducing the amount of expansion of the battery cell in the height direction. This can reduce the possibility of electrical connection failure between adjacent battery cells, thereby improving the reliability and stability of the electrical connection between battery cells.

[0039] In some embodiments, each of the heat exchange crossbars located on top of the battery cell is bonded to the battery cell.

[0040] Compared to other connection methods, bonding provides a more reliable connection and allows multiple battery cells and the heat exchanger to form a unified whole, increasing overall rigidity and suppressing the expansion of battery cells along the height direction. This reduces the likelihood of electrical connection failure between adjacent battery cells. Furthermore, it reduces the possibility of heat exchange medium leakage caused by excessive expansion of battery cells along the height direction leading to seal failure between the heat exchange horizontal and vertical plates, thereby improving the reliability of the heat exchanger operation.

[0041] In some embodiments, the two heat exchangers furthest apart along a first direction are defined as the first heat exchanger, and the heat exchanger between the two furthest apart along the first direction is defined as the second heat exchanger. In the first heat exchanger, the side of the heat exchange vertical plate facing away from the battery cell is flush with the end of the heat exchange horizontal plate facing away from the battery cell.

[0042] This reduces the volume of the part of the first heat exchanger that is not thermally connected to the battery cell, thereby reducing the space occupied by the first heat exchanger in the housing and improving space utilization. Within a limited space, the volume of the battery cell can be made larger, which is beneficial to improving the volumetric energy density of the battery cell.

[0043] In some embodiments, in the second heat exchanger, along the first direction, both sides of the heat exchange vertical plate are spaced apart from the two ends of the heat exchange horizontal plate. In other embodiments, the first and second heat exchangers may have the same structure, that is, in the first heat exchanger, along the second direction, both sides of the heat exchange vertical plate are spaced apart from the two ends of the heat exchange horizontal plate.

[0044] Therefore, the heat exchange plate can simultaneously exchange heat on the bottom and top of adjacent battery cells along the first direction, while improving the structural strength and rigidity of the second heat exchange component to enhance its tensile strength against the limiting beam and improve the limiting beam's ability to resist expansion during the expansion process.

[0045] Secondly, this application provides an electrical device, including the battery device of the first aspect, which is used to provide electrical energy to the electrical device.

[0046] Since the electrical equipment includes all the technical features of the aforementioned battery device, and its effect is the same as described above, it will not be repeated here.

[0047] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0049] Figure 1 This is a schematic diagram of the structure of an electrical device, specifically a vehicle, according to some embodiments of this application.

[0050] Figure 2 This is an exploded view of a battery device according to some embodiments of this application;

[0051] Figure 3 This is an isometric view of a battery device according to some embodiments of this application;

[0052] Figure 4 This is a partial isometric view of a heat exchanger according to some embodiments of this application (the top heat exchanger plate is omitted in the figure).

[0053] Figure 5 This is a side view of a heat exchanger according to some embodiments of this application;

[0054] Figure 6 for Figure 5AA section view;

[0055] Figure 7 for Figure 6 BB section view;

[0056] Figure 8 for Figure 6 CC section view;

[0057] Figure 9 A perspective view of the internal structure of the heat exchanger of a battery device according to some embodiments of this application;

[0058] Figure 10 and Figure 11 The image shows an isometric view of the heat exchange cross plate in the heat exchange component of the battery device according to different embodiments of this application.

[0059] Figure 12 This is a cross-sectional view of the second heat exchange plate of the heat exchanger in some embodiments of this application, passing through the first support rib, the diversion groove and the confluence groove. The arrows in the figure indicate the general flow direction of the heat exchange medium.

[0060] Figure 13 for Figure 12 A magnified view of part I.

[0061] The reference numerals in the detailed embodiments are as follows:

[0062] 1000, vehicle; 200, controller; 300, motor;

[0063] 100. Battery device;

[0064] 110. Box body; 111. Limiting beam; 1111. Groove; 1112. Chamber; 112. Mounting beam;

[0065] 120. Battery cell assembly; 121. Battery cell; 1211. First side; 1212. Second side; 1213. Electrode terminal;

[0066] 130. Thermal management component; 131. Heat exchanger; 1311. Current collector; 13111. First current collector cavity; 13112. Second current collector cavity; 13113. First plug; 13114. Second plug; 13115. First connecting port; 13116. Second connecting port; 1312. Heat exchange vertical plate; 13121. First heat exchange flow channel; 131211. First chamber; 131212. Second chamber; 1313, heat exchange horizontal plate; 13131, flow divider; 13132, flow combiner; 13133, outlet; 13134, first support rib; 13135, second support rib; 13136, third support rib; 13137, second heat exchange channel; 131371, first branch channel; 131372, second branch channel; 1314, first sealing element; 132, pipeline;

[0067] X, first direction; Y, second direction; Z, altitude direction. Detailed Implementation

[0068] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0070] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0071] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0073] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0074] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0075] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0076] Currently, batteries typically use single-sided heat exchange to regulate temperature. This method has limited temperature regulation capabilities, especially for prismatic battery cells, which have multiple sides. When using single-sided heat exchange, other sides are prone to temperature buildup or excessively low temperatures. Both excessively high and low temperatures can easily cause battery performance degradation and lead to battery life reduction.

[0077] In view of this, this application provides a battery device that achieves three-sided thermal contact with the top, bottom, and sides of the battery cell through a combination structure of heat exchange vertical plates and heat exchange horizontal plates. This increases the heat exchange area between the heat exchange components and the battery cell, which is beneficial for improving heat exchange efficiency. This, in turn, enhances the temperature regulation capability of the thermal management components for the battery cell, reduces the impact of ambient temperature and temperature under fast charging conditions on the battery cell, and enables the battery cell to operate within a suitable temperature range. Furthermore, the heat exchange vertical and horizontal plates exchange heat on three sides of the battery cell, which helps improve the temperature uniformity of the battery cell, reduces performance degradation caused by localized temperature unevenness, and helps extend battery life.

[0078] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0079] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0080] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0081] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0082] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0083] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0084] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to house the battery cell assembly.

[0085] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0086] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0087] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as electric vehicles, cars, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0088] In some embodiments, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0089] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0090] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of a single battery cell, active ions, such as lithium ions, repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0091] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0092] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0093] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. A composite current collector may include a polymer base layer and a metal layer. A composite current collector can be formed by forming metal materials such as aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys on a polymer base material such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene.

[0094] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, lithium iron phosphate (such as LiFePO4). 4， It can also be abbreviated as LFP), lithium iron phosphate and carbon composite materials, lithium manganese phosphate (such as LiMnPO4), etc. 4） At least one of lithium manganese phosphate and carbon composites, lithium manganese iron phosphate, and lithium manganese iron phosphate and carbon composites. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxides (such as LiCoO2). 2） Lithium nickel oxides (such as LiNiO) 2） Lithium manganese oxides (such as LiMnO2, LiMn2O) 4） Lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi) 1 / 3 Co 1 / 3 Mn 1 / 3 O 2， It can also be abbreviated as NCM 333 LiNi 0.5 Co 0.2 Mn 0.3 O 2， It can also be abbreviated as NCM 523 LiNi 0.5 Co 0.25 Mn 0.25 O 2， It can also be abbreviated as NCM 211 LiNi 0.6 Co 0.2 Mn 0.2 O 2， It can also be abbreviated as NCM 622 LiNi 0.8 Co 0.1 Mn 0.1 O 2， It can also be abbreviated as NCM 811） Lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 O 2） At least one of the above-mentioned substances and their modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0095] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0096] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0097] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For instance, the metal foil can be a pure metal, an alloy, or a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. A composite current collector may include a polymer substrate and a metal layer. Composite current collectors can be formed by depositing metallic materials such as copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys onto a polymer substrate such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene.

[0098] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0099] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0100] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0101] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0102] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0103] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0104] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0105] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0106] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0107] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0108] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0109] Liquid electrolytes include electrolyte salts and solvents.

[0110] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0111] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent, which may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0112] In some embodiments, the electrolyte may optionally include additives. For example, the additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0113] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid – lithium salt.

[0114] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0115] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0116] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor lithium germanium phosphosulfur, silver sulfide germanium ore, amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0117] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0118] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0119] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0120] In some embodiments, the electrode assembly has a stacked structure.

[0121] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0122] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0123] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0124] As an example, multiple separators can be provided, each positioned between any adjacent positive and negative electrode plates.

[0125] As an example, the separator can be continuously arranged between any adjacent positive and negative electrode plates by folding or rolling.

[0126] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal in shape.

[0127] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0128] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), or a composite metal casing (such as a copper-aluminum composite casing), etc. In some embodiments, the casing may be a sealed structure or an unsealed structure.

[0129] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0130] In some embodiments, the housing includes an end cap and a housing, the housing having an opening and the end cap covering the opening. The housing may have one or more openings, and the end cap may also have one or more.

[0131] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0132] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0133] As an example, when the internal pressure or temperature of a battery cell reaches a predetermined threshold, a pressure relief mechanism is activated to release the internal pressure or temperature. When the internal pressure or temperature of a battery cell reaches the predetermined threshold, the pressure relief mechanism performs its action, or a weak structure within the pressure relief mechanism is damaged, thereby creating an opening or channel for the release of internal pressure or temperature. This threshold design varies depending on design requirements and may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell.

[0134] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0135] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0136] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0137] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0138] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0139] For ease of explanation, the following embodiments use an electrical device from some embodiments of this application as an example.

[0140] The electrical equipment includes a battery device 100 according to various embodiments, which is used to provide electrical energy to the electrical equipment.

[0141] Electrical equipment can include, but is not limited to, electric vehicles, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0142] Figure 1This is a schematic diagram of the structure of a vehicle 1000, used as the electrical device in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0143] For ease of explanation, the following embodiments use a battery device 100 from some embodiments of this application as an example.

[0144] Please refer to Figure 2 and Figure 3 The battery device 100 includes a battery cell assembly 120 and a thermal management component 130. The battery cell assembly 120 includes a plurality of battery cells 121 and has a height orientation Z. The thermal management component 130 includes a plurality of heat exchange elements 131 arranged along a first direction X. A battery cell 121 is disposed between two adjacent heat exchange elements 131. Each heat exchange element 131 includes a heat exchange vertical plate 1312 and a heat exchange horizontal plate 1313. Along the height direction Z of the battery cell assembly 120, the heat exchange vertical plate 1312 is connected to the two ends of the heat exchange horizontal plate 1313. Both the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 extend along a second direction Y. The heat exchange horizontal plate 1313 located at one end of the heat exchange vertical plate 1312 along the height direction Z is thermally connected to the bottom of the battery cell 121. The heat exchange horizontal plate 1313 located at the other end of the heat exchange vertical plate 1312 along the height direction Z is thermally connected to the top of the battery cell 121. The heat exchange vertical plate 1312 is thermally connected to one side of the battery cell 121 along the first direction X. The first direction X and the second direction Y intersect. The plane containing the first direction X and the second direction Y intersects with the height direction Z of the battery cell 121.

[0145] The first direction X, the second direction Y, and the height direction Z can be perpendicular to each other.

[0146] A thermally conductive connection refers to a form of connection between two components that enables efficient heat transfer. Its purpose is to quickly conduct the heat generated by the battery cell 121 to the heat exchanger 131, achieving thermal management. Unlike traditional mechanical connections, it does not require additional fixing structures to form an effective thermally conductive connection, or it can be established through fixing. Specifically, it can take the form of direct bonding (without additional fixing components, heat transfer is achieved solely through surface contact), or a medium such as thermally conductive adhesive or a thermally conductive pad can be placed between the bonding surfaces of the two components to reduce contact thermal resistance. For example, thermally conductive adhesive or a thermally conductive pad can be placed between the heat exchanger 131 and the battery cell 121.

[0147] The number of battery cells 121 between two adjacent heat exchangers 131 can be one or more. When there are multiple battery cells 121 between two adjacent heat exchangers 131, the multiple battery cells 121 between two adjacent heat exchangers 131 are arranged along the second direction Y to form a battery cell assembly 120. The number of battery cell assemblies 120 can be one or more. When there are multiple battery cell assemblies 120, the multiple battery cell assemblies 120 are arranged along the first direction X. The battery cells 121 between two adjacent heat exchangers 131 can be, but are not limited to, blade battery cells, prismatic battery cells, or cylindrical battery cells.

[0148] The heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 can be connected by welding, bonding, or integral molding. The heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 can also be connected in a detachable manner, such as by snap-fit ​​or screw connection. A sealing ring or sealant should be provided on the sealing joint surface for sealing to facilitate disassembly and assembly.

[0149] The structures of the heat exchange horizontal plates 1313 at both ends of the heat exchange vertical plate 1312 can be the same or different.

[0150] The combination of the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 achieves three-sided thermal contact between the top, bottom, and sides of the battery cell 121, increasing the heat exchange area between the heat exchange component 131 and the battery cell 121. This improves heat exchange efficiency and enhances the temperature regulation capability of the thermal management component 130 for the battery cell 121, reducing the impact of ambient temperature and fast-charging environment temperature on the battery cell 121 and enabling it to operate within a suitable temperature range. Furthermore, the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 exchange heat on three sides of the battery cell 121, improving temperature uniformity and reducing performance degradation caused by localized temperature unevenness, thus extending battery life.

[0151] In some embodiments, along the height direction Z, the total dimension between the current collector 1311 and the heat exchange horizontal plate 1313 located at the bottom of the battery cell 121 can be slightly larger than or equal to the outer casing dimension of the battery cell 121. This facilitates the heat exchange horizontal plate 1313 located at the top of the battery cell 121 to be thermally connected to the top of the battery cell 121, and can increase the thermal conductivity area between the heat exchange vertical plate 1312 and the battery cell 121.

[0152] In some embodiments, please continue to refer to Figure 2 and Figure 3 The battery device 100 also includes a housing 110 with a receiving space. The battery cell assembly 120 and the thermal management component 130 are both located in the receiving space. The housing 110 includes limiting beams 111. The battery cell assembly 120 is provided with limiting beams 111 on both sides along the second direction Y. The limiting beams 111 on both sides of the battery cell assembly 120 along the second direction Y are connected to the two ends of the heat exchange component 131.

[0153] The limiting beam 111 and the heat exchange component 131 can be connected by welding, riveting or integral molding.

[0154] Taking the battery device 100 used in a vehicle as an example, the vehicle's direction of travel can be the same as the second direction Y. The housing 110 is provided with two mounting beams 112 spaced apart along the first direction X, which are used to connect to the vehicle. In this way, the direction in which the limiting beam 111 absorbs the expansion force is roughly the same as the vehicle's direction of travel, but different from the mounting beam 112, so as to reduce the deformation of the mounting beam 112 caused by excessive expansion force, thereby improving the reliability of the battery device 100.

[0155] The limiting beam 111 is a beam-shaped structural component on the housing 110 that is set along the single expansion direction of the battery cell 121 and is mainly used to bear and resist the expansion force of the battery cell 121.

[0156] By connecting the limiting beams 111 on both sides of the battery cell assembly 120 along the second direction Y to the two ends of the heat exchanger 131, the limiting beams 111 and the heat exchanger 131 form an integral protective structure. This improves the structural strength and stiffness of the limiting beams 111 and reduces their deformation under battery expansion force and external loads. Simultaneously, the heat exchanger 131 provides multi-point support and constraint to the limiting beams 111, enhancing the overall structural stability of the housing 110 and reducing deformation caused by battery expansion, temperature changes, or external impacts, thus extending the service life of the battery device 100.

[0157] In some embodiments, please continue to refer to Figure 2 and Figure 3Along the height direction Z, at least one of the heat exchange horizontal plates 1313 located on both sides of the battery cell 121 is connected one-to-one with the limiting beams 111 located on both sides of the battery cell assembly 120 along the second direction Y.

[0158] By directly connecting at least one end of the heat exchange cross plate 1313 on both sides of the battery cell 121 to the limiting beams 111 on both sides of the battery cell assembly 120 along the second direction Y, compared with the structure of setting current collectors 1311 at both ends of the heat exchange plate, the direct bearing of the heat exchange medium flow channel sealing position on the battery expansion force can be reduced, thereby reducing the risk of sealing connection failure between the current collector 1311 and the heat exchange plate due to expansion force, effectively preventing heat exchange medium leakage, improving the sealing reliability of the thermal management component 130 and the safety of the battery device 100.

[0159] In some embodiments, please refer to Figure 2 The battery cell 121 includes two first side surfaces 1211 arranged opposite each other along the second direction Y and two second side surfaces 1212 arranged opposite each other along the first direction X. The area of ​​the first side surface 1211 is larger than the area of ​​the second side surface 1212. The second side surface 1212 is thermally connected to the heat exchanger 131.

[0160] The battery cell 121 uses its larger first side surface 1211 as the expansion force-bearing surface, and its smaller second side surface 1212 is thermally connected to the heat exchanger 131. This ensures that the main expansion force generated by the battery cell 121 during charging and discharging acts on the first side surface 1211, and is directly borne and absorbed by the limiting beams 111 on both sides of the battery cell assembly 120 along the second direction Y. This reduces the expansion force between adjacent battery cells 121 on the heat exchanger 131, thereby preventing the flow channels within the heat exchanger 131 from being crushed due to excessive expansion force, and improving the reliability of the thermal management component 130. Furthermore, the limiting beams 111 can fully absorb the expansion force, reducing damage to the housing 110 caused by the expansion force.

[0161] For ease of description later, the two heat exchangers 131 that are furthest apart along the first direction X are defined as the first heat exchanger, and the heat exchanger 131 between the two furthest heat exchangers 131 along the first direction X is defined as the second heat exchanger. The structures of the first heat exchanger and the second heat exchanger can be the same or different.

[0162] In some embodiments, please refer to Figures 4-9 The heat exchange vertical plate 1312 has a first heat exchange channel 13121 inside, and the heat exchange horizontal plate 1313 has a second heat exchange channel 13137 inside. The second heat exchange channel 13137 of at least one of the heat exchange horizontal plates 1313 located at both ends of the heat exchange vertical plate 1312 along the height direction Z is connected to the first heat exchange channel 13121.

[0163] The second heat exchange channel 13137 of the first heat exchanger and the second heat exchange channel 13137 of the second heat exchanger may have the same structure or different structure.

[0164] Both the first heat exchange channel 13121 and the second heat exchange channel 13137 can be straight channels or bends.

[0165] The first heat exchange channel 13121 and the second heat exchange channel 13137 can be connected in series or in parallel.

[0166] The heat exchange vertical plate 1312 is provided with a first heat exchange channel 13121 inside, and the heat exchange horizontal plate 1313 is provided with a second heat exchange channel 13137 inside. The second heat exchange channel 13137 located at at least one of the two ends in the height direction Z of the heat exchange vertical plate 1312 is connected to the first heat exchange channel 13121, realizing the connection and integrated flow of the heat exchange channels. This allows the heat exchange medium to flow smoothly between the first heat exchange channel 13121 and the second heat exchange channel 13137, forming a continuous heat exchange path. This is beneficial to improving the flow efficiency and heat exchange uniformity of the heat exchange medium, enhancing the ability to synchronously regulate the temperature of the top, bottom and sides of the battery cell 121, and simplifying the structure of the heat exchange component 131.

[0167] In some embodiments, please refer to Figure 2 The heat exchanger 131 also includes a current collector 1311. The current collector 1311 is provided between the heat exchange horizontal plate 1313 and the heat exchange vertical plate 1312, which are thermally connected to the top of the battery cell 121. The heat exchange horizontal plate 1313 located at the top of the battery cell 121 is connected to the heat exchange vertical plate 1312 via the current collector 1311. The current collector 1311 has a flow channel, and the second heat exchange flow channel 13137 of the heat exchange horizontal plate 1313 located at the top of the battery cell 121 is connected to the first heat exchange flow channel 13121 via the flow channel.

[0168] The collector 1311 has a heat exchange medium inlet and a heat exchange medium outlet that are respectively connected to the heat exchange flow channel. The heat exchange medium inlet and the heat exchange medium outlet can be located at the same end of the collector 1311 or at both ends of the collector 1311.

[0169] The heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 can be connected in series or in parallel through the flow collection channel.

[0170] As an example, the current collector 1311 can be a long strip structure, with one end of the current collector 1311 extending to one end of the heat exchange vertical plate 1312 along the second direction Y, and the other end of the current collector 1311 extending to the other end of the heat exchange vertical plate 1312.

[0171] Taking parallel connection as an example, the flow collection channel can be two chambers spaced apart along the second direction Y. One chamber is connected to the inlet of the first heat exchange channel 13121 and the second heat exchange channel 13137 respectively, and the other chamber is connected to the outlet of the first heat exchange channel 13121 and the second heat exchange channel 13137 respectively.

[0172] By configuring the collection channel of the current collector 1311, the heat exchange medium can be split vertically through the current collector 1311, enabling simultaneous supply of heat exchange medium to both the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313. This effectively shortens the overall flow path of the heat exchange medium, reduces flow resistance, and improves the supply and circulation efficiency of the heat exchange medium, thereby enhancing the heat exchange uniformity of the heat exchange component 131 to the battery cell 121. In other embodiments, current collectors 1311 can be respectively configured at both ends of the first heat exchange component along the second direction Y. The current collector 1311 at one end along the second direction Y is used to simultaneously supply heat exchange medium to the first and second heat exchange components, while the current collector 1311 at the other end along the second direction Y is used to collect and discharge the heat exchange medium within the first and second heat exchange components.

[0173] In some embodiments, please refer to Figures 4-9 The current collection channel includes a first current collection cavity 13111 and a second current collection cavity 13112 arranged at intervals along the first direction X. The first heat exchange channel 13121 includes a first chamber 131211 and a second chamber 131212 arranged at intervals along the second direction Y. The second heat exchange channel 13137 of the heat exchange horizontal plate 1313 located at the top of the battery cell 121 is connected to the first chamber 131211 through the first current collection cavity 13111. The second heat exchange channel 13137 of the heat exchange horizontal plate 1313 located at the top of the battery cell 121 is connected to the second chamber 131212 through the second current collection cavity 13112.

[0174] In one example, both the first collector cavity 13111 and the second collector cavity 13112 extend along the second direction Y to both ends of the collector 1311. One end of the first collector cavity 13111 is blocked, while the other end allows the heat exchange medium to pass through. The end of the second collector cavity 13112 away from the blocked end of the first collector cavity 13111 is blocked, while the other end of the second collector cavity 13112 leads out the heat exchange medium. The first collector cavity 13111 and the second collector cavity 13112 can share a sidewall. Specifically, they can be blocked using sealing components. The first collector cavity 13111 can only extend through one end of the collector 1311 along the second direction Y, and the second collector cavity 13112 can only extend through the other end of the collector 1311 along the second direction Y, thus saving on the number of sealing components required.

[0175] The second heat exchange channel 13137 of the top heat exchange horizontal plate 1313 is connected to the first chamber 131211 via the first collection cavity 13111, and the second heat exchange channel 13137 of the top heat exchange horizontal plate 1313 is connected to the second chamber 131212 via the second collection cavity 13112, thus realizing multi-path distribution and supply of the heat exchange medium. This structure can improve the uniformity of heat exchange medium distribution in the channels, reduce local flow resistance, shorten the path of heat exchange medium entering each heat exchange channel, reduce local insufficient flow or temperature unevenness caused by uneven channel connectivity, and thus improve the heat exchange efficiency and temperature consistency of the heat exchange component 131 to the battery cell 121.

[0176] In some embodiments, the second heat exchange channel 13137 of the heat exchange cross plate 1313 located at the bottom of the battery cell 121 is connected to the first heat exchange channel 13121.

[0177] The second heat exchange channel 13137 of the heat exchange horizontal plate 1313 located at the bottom of the battery cell 121 is connected to the first heat exchange channel 13121. This eliminates the need to set up an independent liquid supply, collection and sealing structure for the bottom heat exchange horizontal plate 1313, reducing problems such as increased pipelines, complex interfaces and difficult assembly caused by separate liquid supply. This simplifies the overall structure of the thermal management component 130, facilitates assembly, and reduces the risk of sealing failure and heat exchange medium leakage caused by separate liquid supply structure, thereby improving the structural compactness and operational reliability of the battery device 100.

[0178] In some embodiments, please refer to Figures 6-9 The first heat exchange channel 13121 includes a first chamber 131211 and a second chamber 131212 arranged at intervals along the second direction Y. The first chamber 131211 and the second chamber 131212 are respectively connected to the second heat exchange channel 13137 of the heat exchange horizontal plate 1313 located at the bottom of the battery cell 121.

[0179] The number of both the first chamber 131211 and the second chamber 131212 can be one or more.

[0180] As an example, there are multiple first chambers 131211, spaced apart along the second direction Y, with adjacent first chambers 131211 separated by a first reinforcing rib. There are also multiple second chambers 131212, spaced apart along the second direction Y, with adjacent second chambers 131212 separated by a second reinforcing rib. The multiple second chambers 131212 are located on one side of the multiple first chambers 131211 along the second direction Y, and the closest first chamber 131211 and second chamber 131212 along the second direction Y are spaced apart, separated by a third reinforcing rib. In other examples, the first and / or second reinforcing ribs may be omitted, i.e., there may be only one first chamber 131211 and / or one second chamber 131212.

[0181] The shapes of the first chamber 131211 and the second chamber 131212 are not specifically limited. They can be made as large as possible based on the contact area between the heat exchange plate 1312 and the battery cell 121. For example, the total area of ​​the two chambers can be set to account for 50%-95% of the area of ​​the heat exchange plate 1312 along the first direction X. The specific design can be made according to actual needs.

[0182] The first heat exchange channel 13121 adopts a first chamber 131211 and a second chamber 131212 arranged at intervals along the second direction Y. The first chamber 131211 and the second chamber 131212 are respectively connected to the second heat exchange channel 13137 of the bottom heat exchange horizontal plate 1313 of the battery cell 121. The heat exchange medium can be diverted through the first chamber 131211 and flow into the second heat exchange channel 13137 of the bottom heat exchange horizontal plate 1313, and then be merged and output through the second chamber 131212. Compared with the first heat exchange channel 13121 and the second heat exchange channel 13137 connected in series with the bottom heat exchange horizontal plate 1313, the path of the heat exchange medium flowing into the second heat exchange channel 13137 can be shortened, which is conducive to improving the uniformity of the heat exchange medium flow between the heat exchange vertical plate 1312 and the bottom heat exchange horizontal plate 1313, reducing local flow resistance, optimizing the pressure distribution in the channel, and improving the heat exchange efficiency and temperature consistency of the heat exchange component 131 to the battery cell 121.

[0183] In some embodiments, please refer to Figures 7-12The heat exchange horizontal plate 1313 is provided with a flow divider 13131 and a flow collector 13132 on the side facing the heat exchange vertical plate 1312. The flow divider 13131 and the flow collector 13132 are arranged at intervals along the second direction Y. In the same heat exchange horizontal plate 1313, the flow divider 13131 is connected to the second heat exchange channel 13137 and the first chamber 131211 respectively, and the flow collector 13132 is connected to the second heat exchange channel 13137 and the second chamber 131212 respectively.

[0184] Both the first heat exchanger and the second heat exchanger can have a flow divider 13131 and a flow collector 13132 provided on the side of the heat exchange horizontal plate 1313 facing the heat exchange vertical plate 1312.

[0185] The diversion channel 13131 can serve as the inlet end of the second heat exchange channel 13137, and the confluence channel 13132 can serve as the outlet end of the second heat exchange channel 13137. Alternatively, the confluence channel 13132 can serve as the inlet end of the second heat exchange channel 13137, and the diversion channel 13131 can serve as the outlet end of the second heat exchange channel 13137.

[0186] Both the diversion channel 13131 and the confluence channel 13132 can be long channels extending along the second direction Y, where a long channel means that the dimension of the channel along the second direction Y is greater than its dimension along the first direction X.

[0187] As an example, along the height direction Z, the orthographic projections of both the diversion channel 13131 and the confluence channel 13132 onto the heat exchange vertical plate 1312 are located within the outer contour of the heat exchange vertical plate 1312.

[0188] The number of diversion channels 13131 and the number of confluence channels 13132 can be one or more. When there are multiple confluence channels 13132, the multiple confluence channels 13132 are arranged at intervals along the second direction Y.

[0189] In the heat exchange horizontal plate 1313 located at the top of the battery cell 121, the diversion channel 13131 is connected to the first chamber 131211 through the first collecting cavity 13111, and its converging channel 13132 is connected to the second chamber 131212 through the second collecting cavity 13112. Specifically, the top and bottom of the current collector 1311 are provided with a first connecting port 13115 and a second connecting port 13116, and the first connecting port 13115 and the second connecting port 13116 on the same side of the current collector 1311 are spaced apart along the second direction Y. The diversion channel 13131 is connected to the first collecting cavity 13111 through the first connecting port 13115 at the top of the current collector 1311, and the converging channel 13132 is connected to the second collecting cavity 13112 through the second connecting port 13116 at the top of the current collector 1311. In the heat exchange plate 1313 located at the bottom of the battery cell 121, the diversion channel 13131 is connected to the first chamber 131211 through the first communication port 13115 at the bottom of the current collector 1311, and the confluence channel 13132 is connected to the second chamber 131212 through the second communication port 13116 at the bottom of the current collector 1311.

[0190] Since the first collector cavity 13111 and the second collector cavity 13112 are spaced apart along the first direction X, the first connecting port 13115 and the second connecting port 13116 are also spaced apart along the first direction X to facilitate one-to-one communication with the first collector cavity 13111 and the second collector cavity 13112. To facilitate communication between the diversion groove 13131 of the heat exchange horizontal plate 1313 located on top of the battery cell 121 and the first connecting port 13115, and between the confluence groove 13132 and the second connecting port 13116, please refer to... Figure 11 The heat exchange horizontal plate 13133 located on top of the battery cell 121 has a diversion groove 13131 and a confluence groove 13132 spaced apart along the second direction Y. The diversion groove 13131 corresponds to the first connecting port 13115 on the top of the current collector 1311, and the confluence groove 13132 corresponds to the second connecting port 13116 on the top of the current collector 1311. Alternatively, the openings of both the diversion groove 13131 and the confluence groove 13132 can be made wider, as shown in the reference... Figure 10 The structure shown arranges the slots of both in a straight line, meaning the diversion slot 13131 and the confluence slot 13132 of the top and bottom heat exchange horizontal plates 1313 are structurally identical. The bottom heat exchange horizontal plate 1313 can also employ... Figure 10 The structure shown is connected to the heat exchange vertical plate 1312.

[0191] Optionally, along the second direction Y, the size of the top heat exchange plate 1313 may be smaller than or equal to the size of the bottom heat exchange plate 1313.

[0192] By providing a flow-diverting groove 13131 and a flow-collecting groove 13132 spaced along the second direction Y on the side of the heat exchange horizontal plate 1313 facing the heat exchange vertical plate 1312, the flow-diverting groove 13131 is connected to the second heat exchange channel 13137 and the first chamber 131211 respectively, and the flow-collecting groove 13132 is connected to the second heat exchange channel 13137 and the second chamber 131212 respectively. This achieves directional diversion and convergence of the heat exchange medium between the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313, forming a stable and smooth flow path. This structure can shorten the flow path of the heat exchange medium between the first chamber 131211 and the second chamber 131212 and the second heat exchange channel 13137 respectively, thereby reducing the flow resistance at the channel transition.

[0193] In some embodiments, please refer to Figure 9 and Figure 12 In the same heat exchange horizontal plate 1313, the interior of the heat exchange horizontal plate 1313 has a receiving cavity and a first support rib 13134 and a second support rib 13135 extending along the second direction Y respectively. The first support rib 13134 and the second support rib 13135 are both disposed in the receiving cavity. Part of the diversion groove 13131 and part of the confluence groove 13132 are formed on the first support rib 13134. The second support rib 13135 is provided on at least one side of the first support rib 13134 along the first direction X. The first support rib 13134, the second support rib 13135 and the inner wall of the receiving cavity together define the second heat exchange flow channel 13137.

[0194] As an example, the manifold 13132 extends through at least one side of the first support rib 13134 along the first direction X. Along the second direction Y, both ends of the second support rib 13135 are spaced apart from the inner wall of the receiving cavity.

[0195] The number of first support ribs 13134 can be one or more. When there are multiple first support ribs 13134, the dimensions of the multiple first support ribs 13134 along the second direction Y can be the same or different. The number of second support ribs 13135 can also be one or more. When there are multiple second support ribs 13135, the dimensions of the multiple second support ribs 13135 along the second direction Y can be the same or different. The multiple second support ribs 13135 can be spaced apart along the second direction Y, or spaced apart along the first direction X, or arranged in at least two rows and two columns along the first direction X and the second direction Y.

[0196] As an example, along the height direction Z, the first support rib 13134 at least partially overlaps with the area enclosed by the orthographic projection of the heat exchange vertical plate 1312 and the outer contour of the heat exchange vertical plate 1312, so as to support the heat exchange vertical plate 1312 and prevent the second heat exchange channel 13137 from being crushed and blocked under the force of the heat exchange vertical plate 1312, thereby improving the reliability of the heat exchange horizontal plate 1313.

[0197] The first support rib 13134 and the second support rib 13135 can be integrally formed with the inner wall of the receiving cavity. Specifically, they can be manufactured through processes such as injection molding or extrusion molding.

[0198] The first support rib 13134 and the second support rib 13135 can improve the structural strength and rigidity of the heat exchange horizontal plate 1313. On the one hand, this can improve the ability of the limiting beam 111 to resist the expansion of the battery cell 121. On the other hand, it can reduce the risk of the second heat exchange channel 13137 being crushed and blocked due to excessive deformation of the heat exchange horizontal plate 1313, which is conducive to improving the reliability of the heat exchange horizontal plate 1313. In addition, the heat exchange channel formed by the first support rib 13134 and the second support rib 13135 and the inner wall of the receiving cavity, extending along the second direction Y, can prolong the flow path of the heat exchange medium, which is conducive to improving the heat exchange efficiency.

[0199] In some embodiments, in the first heat exchanger, a second support rib 13135 is provided on one side of the first support rib 13134 along the first direction X, and the second support rib 13135 is located on the side of the heat exchange vertical plate 1312 facing the battery cell 121. The second support rib 13135 located on the side of the first support rib 13134 along the first direction X, together with the first support rib 13134 and part of the inner wall of the receiving cavity, defines the second heat exchange flow channel 13137.

[0200] The flow channel structures of the first heat exchanger and the second heat exchanger on one side along the first direction X can be the same or different.

[0201] Since the first heat exchanger is located at the farthest position of the battery cell 121 along the first direction X, the heat exchanger plate 1313 of the first heat exchanger can only exchange heat on one side of the battery cell 121 of the heat exchanger plate 1312. By setting the second support rib 13135 on one side of the first support member along the first direction X, the support and heat exchange requirements can be met, while also reducing the structural complexity.

[0202] In some embodiments, please refer to Figure 12 and Figure 13In the second heat exchanger, the second heat exchange channel 13137 includes a first branch channel 131371 and a second branch channel 131372. The first support rib 13134 is provided with second support ribs 13135 on both sides along the first direction X. The second support rib 13135 located on one side of the first support rib 13134 along the first direction X, together with the first support rib 13134 and part of the inner wall of the receiving cavity, defines the first branch channel 131371. The second support rib 13135 located on the other side of the first support rib 13134 along the first direction X, together with the first support rib 13134 and part of the inner wall of the receiving cavity, defines the second branch channel 131372. The flow channel 13131 is connected to the first branch channel 131371 and the second branch channel 131372 respectively.

[0203] In this embodiment, all the second heat exchange channels 13137 of the heat exchanger 131 may include the first branch channel 131371 and the second branch channel 131372, or only the second heat exchange channel 13137 of the second heat exchanger may include the first branch channel 131371 and the second branch channel 131372.

[0204] The second heat exchange channel 13137 is separated by the first support rib 13134 and the second support rib 13135 to form a first branch channel 131371 and a second branch channel 131372. The branch channel 13131 is simultaneously connected to both the first branch channel 131371 and the second branch channel 131372, allowing the branch channel 13131 to simultaneously supply heat exchange media with similar temperatures to both the first branch channel 131371 and the second branch channel 131372. This enables the same bottom heat exchange horizontal plate 1313 to simultaneously perform synchronous heat exchange on the bottom of the battery cells 121 located on both sides of its first direction X through the two branch channels. This improves the consistency of heating / dissipation at the bottom of the battery cells 121 on both sides of the heat exchange vertical plate 1312.

[0205] In some embodiments, please refer to Figure 12 and Figure 13The heat exchanger 131 also includes a first sealing member 1314. The heat exchanger plate 1313 is provided with a first sealing member 1314 at both ends along the second direction Y. One first sealing member 1314 blocks one end of the receiving cavity, and the other first sealing member 1314 blocks the other end of the receiving cavity. The heat exchanger plate 1313 has a third supporting rib 13136 inside. The first supporting rib 13134 is provided with a third supporting rib 13136 on at least one side along the first direction X. The third supporting rib 13136 is located on one side of the second supporting rib 13135 and is connected to or abuts against one end of the second supporting rib 13135. Along the second direction Y, the third supporting rib 13136 and the first sealing member 1314 located on the same side of the second supporting rib 13135 are spaced apart and divide the second heat exchange channel 13137 into a bent channel.

[0206] The side wall of the diversion channel 13131 is provided with an outlet 13133 that communicates with the diversion channel 13131. Along the second direction Y, the outlet 13133 is located between the third support rib 13136 and the first sealing member 1314 on the same side as the second support rib 13135. The outlet 13133 is used to connect the diversion channel 13131 and the second heat exchange channel 13137.

[0207] As an example, in the first heat exchanger, the side wall of the flow divider 13131 adjacent to the second heat exchange channel 13137 is provided with an outlet 13133, and one or more outlets 13133 may be provided. In the second heat exchanger, the outlets 13133 may be symmetrically arranged on both sides of the flow divider 13131, with one outlet 13133 connecting the first branch channel 131371 and the flow divider 13131, and the other outlet 13133 connecting the second branch channel 131372 and the flow divider 13131.

[0208] The number of second support ribs 13135 can be one or more. For example, multiple second support ribs 13135 are provided at intervals along the first direction X, and are staggered along the second direction Y. At each interval, the end of a second support rib 13135 abuts against or connects to a third support rib 13136 to form a flow channel with a longer bend. Specifically, the length of the second heat exchange flow channel 13137 can be determined according to the dimensions of the heat exchange horizontal plate 1313 along the first direction X, so that the heat exchange horizontal plate 1313 can fully exchange heat with the battery cell 121.

[0209] By providing a third support rib 13136 inside the heat exchange horizontal plate 1313, the third support rib 13136 cooperates with the second support rib 13135 and the first sealing member 1314 to form a bent and extended second heat exchange flow channel 13137 within the accommodating cavity. This prolongs the residence time and heat exchange stroke of the heat exchange medium within the second heat exchange flow channel 13137, increasing the heat exchange contact time between the heat exchange medium and the heat exchange horizontal plate 1313, thereby improving the heat exchange sufficiency and temperature regulation effect at the bottom of the battery cell 121. Simultaneously, the third support rib 13136 provides reliable support for the second support rib 13135 and the second heat exchange flow channel 13137, improving the overall structural strength and deformation resistance of the heat exchange horizontal plate 1313, thus enhancing the flow stability of the bent flow channel and improving the reliability of the heat exchange component 131.

[0210] In some embodiments, please refer to Figure 6 and Figure 7 The current collector 1311 also includes a first plug 13113 and a second plug 13114. The first plug 13113 and the second plug 13114 are provided at both ends of the first current collector 13111 along the second direction Y. The first plug 13113 blocks the second current collector 13112. The first plug 13113 has a first port that communicates with the first current collector 13111. The second plug 13114 blocks the first current collector 13111. The second plug 13114 has a second port that communicates with the second current collector 13112.

[0211] The first plug 13113 can be fixed to the same end of the first manifold 13111 and the second manifold 13112 by means of welding, bonding or integral molding, and the second plug 13114 can be fixed to the same end of the first manifold 13111 and the second manifold 13112 away from the first plug 13113 in the same way.

[0212] The setting of the first plug 13113 and the second plug 13114 can reduce the probability of short circuit of the heat exchange medium on the current collector 1311, so that the heat exchange medium can flow along the preset path, thereby enabling the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 to fully play their respective roles in regulating the temperature of different surfaces of the battery cell 121.

[0213] In some embodiments, the collectors 1311 of two adjacent heat exchangers 131 can be connected in series or in parallel via pipes 132. The limiting beam 111 has a chamber 1112, and the pipes 132 of the collectors 1311 of two adjacent heat exchangers 131 at the same end along the second direction Y are disposed in the chamber 1112 of the same limiting beam 111.

[0214] A chamber 1112 is set inside the limiting beam 111, and the connecting pipe 132 between the adjacent heat exchanger 131 and the collector 1311 is arranged in the chamber 1112. On the one hand, the pipe 132 can be effectively housed and protected, reducing the possibility of leakage caused by the exposed pipe 132 being squeezed or worn. On the other hand, the internal space of the limiting beam 111 can be fully utilized, reducing the occupation of the pipe 132 on the effective internal space of the battery device 100, and improving the structural compactness and space utilization.

[0215] In some embodiments, please refer to Figure 2 The limiting beam 111 has a groove 1111 on the side facing the battery cell 121. Each current collector 1311 corresponds to a groove 1111. The groove 1111 is used to accommodate part of the current collector 1311, and the groove 1111 is connected to the chamber 1112.

[0216] The groove 1111 extends through the top of the side wall of the limiting beam 111, facilitating the direct insertion of a portion of the collector 1311 into the groove 1111 during installation. It also facilitates the assembly of the pipe 132 and the collector 1311 into the chamber 1112, thereby simplifying the positioning of the heat exchanger 131. Therefore, the groove 1111 facilitates the positioning and installation of the thermal management component 130.

[0217] In some embodiments, please continue to refer to Figure 2 The battery cell 121 includes an electrode terminal 1213. Along the first direction X, a heat exchange plate 1313 is provided between the two electrode terminals 1213 of two adjacent battery cells 121 that are closest to each other. Both adjacent battery cells 121 along the first direction X are thermally connected to the same heat exchange plate 1313.

[0218] Each heat exchange plate 1313 located on top of the battery cell 121 is connected to the battery cell 121.

[0219] Each heat exchange horizontal plate 1313 located on top of the battery cell 121 is connected to the battery cell 121 by methods including but not limited to adhesive bonding, snap-fitting, or bolting. For example, a stud can be connected to the top of the battery cell 121, with screw holes provided in the heat exchange horizontal plate 1313. The stud passes through the screw holes and is secured with a nut for easy assembly and disassembly. Each heat exchange horizontal plate 1313 located on top of the battery cell 121 can be fixed to the heat exchange vertical plate 1312 by a detachable connection. This facilitates assembly and disassembly.

[0220] Two adjacent battery cells 121 along the first direction X are thermally connected to the same heat exchange plate 1313. When the battery cell 121 expands along the height direction Z, the top heat exchange plate 1313 can provide overall constraint and support for the battery cell 121, effectively improving the overall structural rigidity and stability of the battery cell assembly 120, suppressing excessive expansion deformation of the battery cell 121 in the height direction Z, and reducing the expansion amount of the battery cell 121 along the height direction Z, thereby reducing the possibility of electrical connection failure between adjacent battery cells 121, and thus improving the reliability and stability of the electrical connection between battery cells 121.

[0221] In some embodiments, each of the heat exchange cross plates 1313 located on top of the battery cell 121 is bonded to the battery cell 121.

[0222] Compared to other connection methods, the bonding method is more reliable and allows multiple battery cells 121 and the heat exchanger 131 to form a single unit, increasing overall rigidity and suppressing the expansion of the battery cells 121 along the height direction Z, thus reducing the possibility of electrical connection failure between adjacent battery cells 121. Furthermore, it reduces the likelihood of heat exchange medium leakage caused by excessive expansion of the battery cells 121 along the height direction Z, leading to sealing failure between the heat exchange horizontal plate 1313 and the heat exchange vertical plate 1312, thereby improving the operational reliability of the heat exchanger 131.

[0223] In some embodiments, please continue to refer to Figure 2 In the first heat exchanger, the side of the heat exchange vertical plate 1312 facing away from the battery cell 121 is flush with the end of the heat exchange horizontal plate 1313 facing away from the battery cell 121.

[0224] In the first heat exchanger, the second heat exchange channel 13137 of the heat exchange horizontal plate 1313 may include the first branch channel 131371 mentioned above. The first support rib 13134 is provided with a second support rib 13135 on one side along the first direction X, and the second support rib 13135 is located on the side of the heat exchange horizontal plate 1313 facing the battery cell 121. The second support rib 13135, the first support rib 13134, and part of the inner wall of the receiving cavity together define the first branch channel 131371.

[0225] This reduces the volume of the portion of the first heat exchanger that is not thermally connected to the battery cell 121, thereby reducing the amount of space occupied by the first heat exchanger within the housing 110 and improving space utilization. Within a limited space, the volume of the battery cell 121 can be made larger, which is beneficial to improving the volumetric energy density of the battery cell 121.

[0226] In some embodiments, please continue to refer to Figure 2In the second heat exchanger, along the first direction X, both sides of the heat exchange vertical plate 1312 are spaced apart from both ends of the heat exchange horizontal plate 1313. In other embodiments, the structures of the first and second heat exchangers can be the same, that is, in the first heat exchanger, along the first direction X, both sides of the heat exchange vertical plate 1312 are spaced apart from both ends of the heat exchange horizontal plate 1313.

[0227] As an example, along the first direction, the heat exchange vertical plate 1312 may be located at the middle position of the heat exchange horizontal plate 1313. As another example, along the first direction X, the heat exchange vertical plate 1312 may be located at a position offset from the middle position of the heat exchange horizontal plate 1313.

[0228] In the second heat exchanger, the second heat exchange flow channel 13137 may include the first branch flow channel 131371 and the second branch flow channel 131372 described above. The specific structure may be the same as that listed above, and will not be described in detail.

[0229] Therefore, the heat exchange plate 1313 can simultaneously exchange heat on the bottom and top of the adjacent battery cells 121 along the first direction X, and at the same time improve the structural strength and rigidity of the second heat exchange component, so as to enhance the tensile strength of the second heat exchange component against the limiting beam 111 and improve the ability of the limiting beam 111 to resist expansion during the expansion process.

[0230] In one specific alternative embodiment of the battery device 100, please refer to Figures 2-13 The battery device 100 includes a battery cell assembly 120, a thermal management component 130, and a housing 110. The battery cell assembly 120 and the thermal management component 130 are both housed within the housing space.

[0231] The thermal management component 130 includes a plurality of heat exchange elements 131 arranged along a first direction X, with a plurality of battery cells 121 disposed between two adjacent heat exchange elements 131. The plurality of battery cells 121 between two adjacent heat exchange elements 131 are arranged along a second direction Y. The heat exchange element 131 includes a current collector 1311, a heat exchange vertical plate 1312, and two heat exchange horizontal plates 1313. Along the height direction Z of the battery cell assembly 120, one end of the heat exchange vertical plate 1312 is connected to one heat exchange horizontal plate 1313 through the current collector 1311, and the other end of the heat exchange vertical plate 1312 is connected to the other heat exchange horizontal plate 1313. Both the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 extend along the second direction Y. The heat exchange horizontal plate 1313 located at one end of the heat exchange vertical plate 1312 along the height direction Z is thermally connected to the bottom of the battery cell 121, and the heat exchange horizontal plate 1313 located at the other end of the heat exchange vertical plate 1312 along the height direction Z is thermally connected to the top of the battery cell 121. Each heat exchange horizontal plate 1313 located at the top of the battery cell 121 is bonded to the battery cell 121. The heat exchange horizontal plate 1313 is thermally connected to one side of the battery cell 121 along the first direction X. The first direction X and the second direction Y intersect, and the plane containing the first direction X and the second direction Y intersects with the height direction Z of the battery cell 121. The housing 110 includes limiting beams 111, and the battery cell assembly 120 is provided with limiting beams 111 on both sides along the second direction Y. Along the height direction Z, at least one of the heat exchange horizontal plates 1313 located on both sides of the battery cell 121 is connected one-to-one with the limiting beams 111 located on both sides of the battery cell assembly 120 along the second direction Y.

[0232] The heat exchange vertical plate 1312 has a first heat exchange flow channel 13121 inside. The heat exchange horizontal plate 1313 has a second heat exchange flow channel 13137 inside. The collector 1311 has a collection channel, which includes a first plug 13113, a second plug 13114, and a first collection chamber 13111 and a second collection chamber 13112 spaced apart along a first direction X. The first heat exchange flow channel 13121 includes a first chamber 131211 and a second chamber 131212 spaced apart along a second direction Y. The first collector cavity 13111 is provided with a first plug 13113 and a second plug 13114 at its two ends along the second direction Y. The first plug 13113 blocks the second collector cavity 13112 and has a first port connected to the first collector cavity 13111. The second plug 13114 blocks the first collector cavity 13111 and has a second port connected to the second collector cavity 13112.

[0233] The heat exchange horizontal plate 1313 has a flow divider 13131 and a flow collector 13132 on the side facing the heat exchange vertical plate 1312. The flow divider 13131 and the flow collector 13132 are spaced apart along the second direction Y. In the heat exchange horizontal plate 1313 located at the top of the battery cell 121, the second heat exchange channel 13137 is connected to the first chamber 131211 through the flow divider 13131 and the first collecting cavity 13111, and is connected to the second chamber 131212 through the flow collector 13132 and the second collecting cavity 13112. In the heat exchange horizontal plate 1313 located at the bottom of the battery cell 121, the second heat exchange channel 13137 is connected to the first chamber 131211 through the flow divider 13131, and is connected to the second chamber 131212 through the flow collector 13132.

[0234] The two heat exchangers 131 furthest apart along the first direction X are defined as the first heat exchanger, and the heat exchanger 131 between the two furthest apart along the first direction X is defined as the second heat exchanger. In the first heat exchanger, the side of the heat exchange vertical plate 1312 facing away from the battery cell 121 is flush with the end of the heat exchange horizontal plate 1313 facing away from the battery cell 121. In the second heat exchanger, along the first direction X, both sides of the heat exchange vertical plate 1312 are spaced apart from both ends of the heat exchange horizontal plate 1313. In other embodiments, the structures of the first and second heat exchangers can be the same, that is, in the first heat exchanger, along the first direction X, both sides of the heat exchange vertical plate 1312 are spaced apart from both ends of the heat exchange horizontal plate 1313.

[0235] In the same heat exchange horizontal plate 1313, the interior of the heat exchange horizontal plate 1313 has a receiving cavity and a first support rib 13134 and a second support rib 13135 extending along the second direction Y, respectively. The first support rib 13134 and the second support rib 13135 are both disposed within the receiving cavity. A partial flow divider 13131 and a partial flow collector rib 13132 are formed in the first support rib 13134. In the first heat exchanger, the first support rib 13134 has a second support rib 13135 on one side along the first direction X. The first support rib 13134, the second support rib 13135, and the inner wall of the receiving cavity together define a second heat exchange flow channel 13137. In the second heat exchanger, the first support rib 13134 has second support ribs 13135 on both sides along the first direction X. The first support rib 13134, the second support rib 13135, and the inner wall of the receiving cavity together define the second heat exchange flow channel 13137.

[0236] In the second heat exchanger, the second heat exchange channel 13137 includes a first branch channel 131371 and a second branch channel 131372. The first support rib 13134 is provided with second support ribs 13135 on both sides along the first direction X. The second support rib 13135 located on one side of the first support rib 13134 along the first direction X, together with the first support rib 13134 and part of the inner wall of the receiving cavity, defines the first branch channel 131371. The second support rib 13135 located on the other side of the first support rib 13134 along the first direction X, together with the first support rib 13134 and part of the inner wall of the receiving cavity, defines the second branch channel 131372. The flow channel 13131 is connected to the first branch channel 131371 and the second branch channel 131372 respectively.

[0237] The heat exchanger 131 also includes a first sealing member 1314. The heat exchanger plate 1313 is provided with a first sealing member 1314 at both ends along the second direction Y. One first sealing member 1314 blocks one end of the receiving cavity, and the other first sealing member 1314 blocks the other end of the receiving cavity. The heat exchanger plate 1313 has a third supporting rib 13136 inside. The first supporting rib 13134 is provided with a third supporting rib 13136 on at least one side along the first direction X. The third supporting rib 13136 is located on one side of the second supporting rib 13135 and is connected to or abuts against one end of the second supporting rib 13135. Along the second direction Y, the third supporting rib 13136 and the first sealing member 1314 located on the same side of the second supporting rib 13135 are spaced apart and divide the second heat exchange channel 13137 into a bent channel.

[0238] This design achieves three-sided heat exchange within the same battery cell 121, improving the temperature regulation capability of the thermal management component 130. Furthermore, the connection of both ends of the heat exchanger 131 to the limiting beam 111, and the connection of the top heat exchange plate of the heat exchanger 131 to the battery cell 121, increases the overall rigidity of the battery assembly 100. This enhances the ability of the limiting beam 111 to withstand expansion forces and reduces the expansion of the battery cell 121 along the height direction Z, thereby reducing the likelihood of electrical connection failure between adjacent battery cells 121. Additionally, it reduces the possibility of heat exchange medium leakage in the heat exchanger 131.

[0239] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, comprising a plurality of battery cells, wherein the battery cell assembly has a height orientation; A thermal management component includes multiple heat exchange elements arranged along a first direction, with a battery cell disposed between two adjacent heat exchange elements. Each heat exchange element includes a heat exchange vertical plate, a heat exchange horizontal plate, and a current collector. Along the height direction of the battery cell assembly, the heat exchange vertical plate is connected to the heat exchange horizontal plate at both ends. Both the heat exchange vertical plate and the heat exchange horizontal plate extend along a second direction. The heat exchange horizontal plate located at one end of the heat exchange vertical plate along the height direction is thermally connected to the bottom of the battery cell, and the heat exchange horizontal plate located at the other end of the heat exchange vertical plate along the height direction is thermally connected to the top of the battery cell. The heat exchange vertical plate is thermally connected to one side of the battery cell along the first direction. The first direction and the second direction intersect, and the plane containing the first direction and the second direction intersects the height direction of the battery cell. The heat exchange horizontal plate and the heat exchange vertical plate are thermally connected to the top of the battery cell. The heat exchange horizontal plate located at the top of the battery cell is connected to the heat exchange vertical plate through the heat exchange current collector. The heat exchange current collector is configured to introduce a heat exchange medium into the interior of at least one of the heat exchange horizontal plate and the heat exchange vertical plate. The heat exchange vertical plate has a first heat exchange channel inside, the heat exchange horizontal plate has a second heat exchange channel inside, the current collector has a current collection channel, the current collection channel includes a first current collection cavity and a second current collection cavity spaced apart along the first direction, the first heat exchange channel includes a first chamber and a second chamber spaced apart along the second direction, the second heat exchange channel of the heat exchange horizontal plate located at the top of the battery cell is connected to the first chamber through the first current collection cavity, and is connected to the second chamber through the second current collection cavity.

2. The battery device according to claim 1, characterized in that, The battery device also includes a housing with a receiving space, in which the battery cell assembly and the thermal management component are both disposed. The housing includes limiting beams, and the limiting beams are respectively provided on both sides of the battery cell assembly along the second direction. The limiting beams located on both sides of the battery cell assembly along the second direction are connected to the two ends of the heat exchange component.

3. The battery device according to claim 2, characterized in that, Along the height direction, at least one of the heat exchange cross plates located on both sides of the battery cell is connected one-to-one with the limiting beam located on both sides of the battery cell assembly along the second direction.

4. The battery device according to claim 2, characterized in that, The battery cell includes two first sides facing away from each other along the second direction and two second sides facing away from each other along the first direction. The area of ​​the first side is larger than the area of ​​the second side, and the second side is thermally connected to the heat exchanger.

5. The battery device according to claim 1, characterized in that, The second heat exchange channel of the heat exchange plate located at the bottom of the battery cell is connected to the first heat exchange channel.

6. The battery device according to claim 5, characterized in that, The first heat exchange channel includes a first chamber and a second chamber spaced apart along the second direction, and the first chamber and the second chamber are respectively connected to the second heat exchange channel of the heat exchange plate located at the bottom of the battery cell.

7. The battery device according to claim 1 or 6, characterized in that, The heat exchange horizontal plate is provided with a flow divider and a flow converger on the side facing the heat exchange vertical plate. The flow divider and the flow converger are spaced apart along the second direction. In the same heat exchange horizontal plate, the flow divider is connected to the second heat exchange channel and the first chamber respectively, and the flow converger is connected to the second heat exchange channel and the second chamber respectively.

8. The battery device according to claim 7, characterized in that, In the same heat exchange horizontal plate, the interior of the heat exchange horizontal plate has a receiving cavity and a first support rib and a second support rib extending along the second direction, respectively. The first support rib and the second support rib are both disposed in the receiving cavity. Part of the diversion groove and part of the confluence groove are formed in the first support rib. The second support rib is provided on at least one side of the first support rib along the first direction. The first support rib, the second support rib and the inner wall of the receiving cavity together define the second heat exchange flow channel.

9. The battery device according to claim 8, characterized in that, The two heat exchangers that are furthest apart along the first direction are defined as the first heat exchanger, and the heat exchanger between the two heat exchangers that are furthest apart along the first direction is defined as the second heat exchanger. In the first heat exchanger, a second support rib is provided on one side of the first support rib along the first direction, and the second support rib is located on the side of the heat exchange vertical plate facing the battery cell. The second support rib located on the side of the first support rib along the first direction, together with the first support rib and part of the inner wall of the receiving cavity, defines the second heat exchange flow channel. And / or, in the second heat exchanger, the second heat exchange channel includes a first branch channel and a second branch channel. The first support rib is provided with the second support rib on both sides along the first direction. The second support rib located on one side of the first support rib along the first direction, together with the first support rib and a portion of the inner wall of the receiving cavity, defines the first branch channel. The second support rib located on the other side of the first support rib along the first direction, together with the first support rib and another portion of the inner wall of the receiving cavity, defines the second branch channel. The flow divider is connected to the first branch channel and the second branch channel respectively.

10. The battery device according to claim 8, characterized in that, The heat exchanger also includes a first sealing member. The heat exchange cross plate is provided with the first sealing member at both ends along the second direction. One first sealing member seals one end of the receiving cavity, and the other first sealing member seals the other end of the receiving cavity. The heat exchange cross plate has a third supporting rib inside. The first supporting rib is provided with the third supporting rib on at least one side along the first direction. The third supporting rib is located on one side of the second supporting rib and is connected to or abuts against one end of the second supporting rib. Along the second direction, the third supporting rib and the first sealing member located on the same side of the second supporting rib are spaced apart and divide the second heat exchange channel into a bent channel.

11. The battery device according to claim 1, characterized in that, The collector also includes a first plug and a second plug. The first plug and the second plug are provided at both ends of the first collector cavity along the second direction. The first plug blocks the second collector cavity and has a first port connected to the first collector cavity. The second plug blocks the first collector cavity and has a second port connected to the second collector cavity.

12. The battery device according to any one of claims 1-6, characterized in that, The battery cell includes electrode terminals. Along the first direction, a heat exchange plate is provided between the two electrode terminals of two adjacent battery cells that are closest to each other. Furthermore, two adjacent battery cells along the first direction are thermally connected to the same heat exchange plate.

13. The battery device according to any one of claims 1-6, characterized in that, The two heat exchangers that are furthest apart along the first direction are defined as the first heat exchanger, and the heat exchanger between the two heat exchangers that are furthest apart along the first direction is defined as the second heat exchanger. In the first heat exchanger, the side of the heat exchange vertical plate facing away from the battery cell is flush with the end of the heat exchange horizontal plate facing away from the battery cell, and / or, in the second heat exchanger, along the first direction, both sides of the heat exchange vertical plate are spaced apart from the two ends of the heat exchange horizontal plate.

14. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-13, the battery device being used to provide electrical energy to the electrical equipment.

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