Battery device and electric equipment

Abstract

The invention discloses a battery device and electric equipment. The battery device comprises a box body which is provided with an accommodating space and comprises a limiting beam; the battery monomer assembly is arranged in the accommodating space, and limiting beams are respectively arranged on two sides of the battery monomer assembly along the first direction; the heat management part is arranged in the containing space and comprises a plurality of heat exchange parts, the heat exchange parts are arranged in the second direction, battery monomers are connected between every two adjacent heat exchange parts in a heat conduction mode, each heat exchange part comprises a current collector and a body part, and the current collector is arranged on one side of the body part and connected with the body part in the height direction of the box body; the current collector and the body part extend in the first direction, a heat exchange flow channel is formed in the body part, the current collector is configured to guide a heat exchange medium into the heat exchange flow channel and is configured to guide the heat exchange medium out of the heat exchange flow channel, and the body part is connected with the limiting beams located on the two sides of the battery monomer assembly in the first direction respectively.

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] During the cyclic charging and discharging process, the battery casing is subjected to repeated expansion forces, which can lead to a decrease in casing strength and make the casing prone to cracking, severe deformation, and other problems. Summary of the Invention

[0003] In view of the above problems, this application provides a battery device and electrical equipment, in which the current collector is disposed above the main body of the heat exchanger and the main body is connected to the limiting beam, which can improve the strength of the limiting beam and thus reduce the cracking of the housing due to deformation.

[0004] In a first aspect, this application provides a battery device, comprising: The box-shaped structure has a storage space and includes a limiting beam. A battery cell assembly is disposed within an accommodating space, and limiting beams are respectively provided on both sides of the battery cell assembly along the first direction; A thermal management component is disposed within an accommodating space. The thermal management component includes multiple heat exchange elements arranged along a second direction. A battery cell is thermally connected between two adjacent heat exchange elements. Each heat exchange element includes a current collector and a body portion. Along the height direction of the housing, the current collector is disposed on one side of the body portion and connected to the body portion. Both the current collector and the body portion extend along a first direction. The interior of the body portion has a heat exchange channel. The current collector is configured to introduce the heat exchange medium into the heat exchange channel and is configured to discharge the heat exchange medium within the heat exchange channel. The body portion is respectively connected to limiting beams located on both sides of the battery cell assembly along the first direction. The first direction and the second direction intersect. The plane containing the first direction and the second direction intersects with the height direction of the housing.

[0005] By connecting the main body of the heat exchanger to the limiting beam of the housing, and connecting the current collector to one side of the main body along the height of the housing, the structural strength and deformation resistance of the limiting beam are improved. During the expansion force generated by the cyclic charging and discharging of the battery cells, the main body can reinforce the limiting beam, reducing the risk of deformation and cracking of the limiting beam, thereby improving the overall structural stability and service life of the battery housing. Simultaneously, placing the current collector at the top of the heat exchanger, compared to placing it at both ends of the main body and connecting it to the limiting beam, reduces the possibility of the current collector being pulled apart from the main body during expansion, thus reducing the possibility of heat exchange medium leakage and improving the reliability of the thermal management components.

[0006] In some embodiments, the body portion includes only a heat exchange plate, the side of the battery cell along the second direction is thermally connected to the heat exchange plate, and the current collector is connected to the top of the heat exchange plate.

[0007] Compared to placing the collector at both ends of the heat exchange vertical plate and connecting it with the limiting beam, this design reduces the possibility of the collector being pulled apart from the heat exchange vertical plate during expansion, which could lead to leakage of the heat exchange medium and improve the reliability of the thermal management components.

[0008] In some embodiments, the body includes a heat exchange vertical plate and a heat exchange horizontal plate. The heat exchange horizontal plate is located on the side of the heat exchange vertical plate away from the current collector. The heat exchange horizontal plate intersects with and is connected to the heat exchange vertical plate. At least one of the heat exchange vertical plate and the heat exchange horizontal plate is connected to the limiting beams on both sides of the battery cell assembly along the first direction at both ends of the first direction. The heat exchange cross plates of multiple heat exchange elements form the bottom wall of the box, or the box includes a bottom wall, with the heat exchange cross plates located on the side of the heat exchange vertical plate away from the bottom wall.

[0009] Therefore, on the one hand, the increased thermal contact area with the battery cells is beneficial to improving heat exchange efficiency; on the other hand, the connection between the heat exchange vertical plate and the heat exchange horizontal plate forms a reinforcing beam, and at least one of them is directly connected to the limiting beam at both ends along the first direction, which further improves the structural rigidity of the limiting beam, better resists the force brought by the cyclic expansion of the battery cells, and effectively suppresses the deformation and cracking of the box.

[0010] In some embodiments, the heat exchange channel includes a first heat exchange channel and a second heat exchange channel. 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. A diversion groove and a confluence groove are provided on the side of the heat exchange horizontal plate facing the heat exchange vertical plate. The diversion groove and the confluence groove are spaced apart along a first direction. The first heat exchange channel is connected to the diversion groove and the confluence groove respectively, and the second heat exchange channel is connected to the diversion groove and the confluence groove respectively. One of the diversion groove and the confluence groove is configured to introduce the heat exchange medium flowing through the heat exchange vertical plate into the second heat exchange channel, and the other is configured to discharge the heat exchange medium in the second heat exchange channel.

[0011] By alternately setting the diversion channel and the confluence channel, a portion of the heat exchange medium flowing through the heat exchange vertical plate flows into the heat exchange horizontal plate through the diversion channel and flows out through the confluence channel. This allows the heat exchange medium to flow from the heat exchange vertical plate into the heat exchange horizontal plate from top to bottom, and then flow back to the heat exchange vertical plate for outlet. This shortens the flow path of the heat exchange medium. Compared with the heat exchange vertical plate and the heat exchange horizontal plate being connected in series, the path of the heat exchange medium flowing into the heat exchange horizontal plate is shorter, which is beneficial to improving the uniformity of the heat exchange effect of the heat exchange vertical plate and the heat exchange horizontal plate on the battery cells.

[0012] In some embodiments, the heat exchange cross plate has an internal receiving cavity and a first support rib and a second support rib extending along a first direction, respectively. A partial diversion groove and a partial confluence groove are formed on the first support rib. The first support rib is provided with a second support rib on at least one side along a second 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.

[0013] Inside the heat exchange cross plate, a first support rib and a second support rib extending along a first direction are provided. On the one hand, the first support rib and the second support rib can effectively enhance the structural strength and deformation resistance of the heat exchange cross plate, provide reliable support for the heat exchange plate during the expansion of the battery cell, and reduce the risk of the second heat exchange channel collapsing or becoming blocked due to stress. On the other hand, the second heat exchange channel is defined by the first support rib, the second support rib and the inner wall of the accommodating cavity, which can improve the stability and uniformity of the heat exchange medium flow.

[0014] In some embodiments, 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 second direction. The second support rib on one side of the first support rib along the second 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 on the other side of the first support rib along the second direction, together with the first support rib and another portion of the inner wall of the receiving cavity, defines the second branch channel. The diversion channel is connected to the first branch channel and the second branch channel respectively, and the confluence channel is connected to the first branch channel and the second branch channel respectively.

[0015] This allows the heat exchange medium to flow into the first branch channel and the second branch channel simultaneously through the diversion channel, and then flow out through the confluence channel, enabling the heat exchange medium to flow evenly into different positions of the heat exchange plate, which is beneficial to improving the overall heat exchange capacity of the heat exchange plate.

[0016] 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 first 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 second direction. The third supporting rib is located on one side of the second supporting rib and connected to one end of the second supporting rib. Along the first 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.

[0017] A third supporting rib is set inside the heat exchange horizontal plate and connected to the second supporting rib, while being spaced apart from the first sealing member. On the one hand, this can further enhance the structural strength and resistance to expansion and deformation of the heat exchange horizontal plate, and improve the overall structural stability of the heat exchange component. On the other hand, the third supporting rib, the second supporting rib, the first sealing member and the inner wall of the receiving cavity jointly define a part of the second heat exchange flow channel that is connected to the flow distribution groove, so as to form a bent second heat exchange flow channel, which is conducive to improving the heat exchange efficiency of the heat exchange horizontal plate.

[0018] In some embodiments, the sidewall of the diversion channel is provided with an outlet that communicates with the diversion channel. Along the first direction, the outlet is located between the third support rib and the first sealing member on the same side as the second support rib, and communicates with the second heat exchange channel.

[0019] The third support rib allows the heat exchange medium to flow from one end of the heat exchange plate to the other end, and then to meander from the other end, thereby increasing the flow path of the heat exchange medium within the heat exchange plate. This makes the heat exchange plate and the battery cells exchange heat more fully, which is beneficial to improving heat exchange efficiency.

[0020] In some embodiments, third support ribs are provided on both sides of the first support rib along the second direction, and the third support ribs on both sides of the first support rib along the second direction are located on the same side of the second support rib. Each third support rib located on the same side of the second support rib and the first sealing member are spaced apart and together form a portion of the second heat exchange channel connected to the diversion groove.

[0021] Therefore, on the one hand, the heat exchange effect of the flow channels on both sides of the first support rib can be made to be roughly the same, and both can form a bent flow channel, which is conducive to improving the heat exchange efficiency; on the other hand, it can improve the consistency of the heat exchange effect of the flow channels on both sides of the first support rib along the second direction.

[0022] In some embodiments, the heat exchange vertical plate has a first chamber and a second chamber inside, the first chamber and the second chamber are spaced apart along a first direction, the first chamber is connected to the flow divider, the second chamber is connected to the flow collector, the first chamber and the second chamber together form a first heat exchange channel, the two ends of the current collector along the first direction are provided with a first port and a second port respectively, the first chamber is connected to the first port, and the second chamber is connected to the second port.

[0023] By setting a first chamber and a second chamber spaced apart along a first direction within the heat exchange vertical plate, and connecting the first chamber to the diversion channel and the second chamber to the confluence channel, and simultaneously setting a first port and a second port at both ends of the collector to connect to the first chamber and the second chamber respectively, the heat exchange medium can achieve directional and zoned flow between the heat exchange vertical plate and the heat exchange horizontal plate. This ensures that the entire process of heat exchange medium diversion, heat exchange, and confluence does not interfere with each other, which helps to reduce the flow resistance of the heat exchange medium and effectively improves the stability and uniformity of the heat exchange medium flow, thereby improving the consistency and efficiency of heat exchange for battery cells.

[0024] In some embodiments, the current collector includes a first current collector cavity and a second current collector cavity, the first current collector cavity and the second current collector cavity are spaced apart along a second direction, the first cavity is connected to a first port through the first current collector cavity, and the second cavity is connected to a second port through the second current collector cavity.

[0025] By setting a first and a second collector cavity arranged at intervals along the second direction inside the current collector, the first chamber is connected to the first port through the first collector cavity, and the second chamber is connected to the second port through the second collector cavity. This enables the heat exchange medium to flow independently and without interference within the current collector, reducing the mixing of the heat exchange medium entering and exiting the current collector and improving the consistency of heat exchange and temperature control of the battery cells.

[0026] In some embodiments, the current collector further includes a first plug and a second plug, with the first plug and the second plug connected one-to-one at both ends of the current collector along a first direction. The first plug blocks the second current collection cavity and has a first port connected to the first current collection cavity. The second plug blocks the first current collection cavity and has a second port connected to the second current collection cavity.

[0027] By setting a first plug and a second plug at both ends of the collector along the first direction, the first plug blocks the second collector cavity and opens a first port communicating with the first collector cavity, and the second plug blocks the first collector cavity and opens a second port communicating with the second collector cavity. This can achieve reliable separation and independent communication between the first collector cavity and the second collector cavity inside the collector, reducing the occurrence of internal short circuits and mixed flow of the heat exchange medium during entry and exit, thereby improving the uniformity of heat exchange medium distribution and heat exchange efficiency.

[0028] In some embodiments, the heat exchange vertical plate includes a first plate body and a second plate body, the first plate body and the second plate body are arranged along a first direction, the first plate body and the second plate body are respectively connected to the heat exchange horizontal plate body, the first plate body has a first chamber inside, and the second plate body has a second chamber inside.

[0029] Setting the heat exchange vertical plate as a separate structure of the first plate body and the second plate body makes it easier to process and form the first chamber and the second chamber separately, reduces the processing difficulty of the internal flow channel of the heat exchange vertical plate, and helps to reduce production costs.

[0030] In some embodiments, there are multiple first chambers, which are spaced apart along a first direction, and each first chamber is connected to a diversion channel.

[0031] By configuring multiple first chambers and arranging them at intervals along a first direction, with each first chamber connected to a distribution channel, the heat exchange medium is more evenly distributed into the second heat exchange channels of the heat exchange horizontal plate. This improves the uniformity of the heat exchange medium distribution throughout the entire heat exchange component, thereby enhancing the consistency of heat exchange between battery cells and improving the heat exchange effect. Simultaneously, the spaced arrangement of multiple first chambers creates multi-point support within the heat exchange vertical plate, increasing its structural strength and resistance to deformation. This better resists the forces exerted by the expansion of battery cells and reduces the risk of channel blockage or leakage due to deformation of the heat exchange vertical plate under stress.

[0032] In some embodiments, there are multiple second chambers, which are spaced apart along a first direction, and each second chamber is connected to a manifold.

[0033] By configuring multiple second chambers spaced apart along the first direction, with each chamber connected to a manifold, the heat exchange medium can be synchronously and uniformly converged at multiple locations after heat exchange. This reduces increased flow resistance and temperature unevenness caused by localized poor flow, further improving the smoothness of heat exchange medium convergence and overall heat exchange uniformity. Simultaneously, the spaced distribution of multiple second chambers creates multi-point support within the heat exchange vertical plate, enhancing its structural strength and deformation resistance, better resisting the expansion forces of individual battery cells, and reducing the risk of flow channel deformation and leakage.

[0034] In some embodiments, the heat exchange horizontal plate has a receiving cavity and a first supporting rib inside. The first supporting rib is disposed in the receiving cavity and extends along a first direction. Along the height direction of the box body, the projection of the heat exchange vertical plate on the heat exchange horizontal plate at least partially coincides with the first supporting rib. The projection of the heat exchange vertical plate onto the heat exchange horizontal plate coincides at least partially with the first support rib. On the one hand, this can prevent the heat exchange vertical plate from crushing the flow channel of the heat exchange horizontal plate, so that the flow channel in the heat exchange horizontal plate can work reliably and stably. On the other hand, it can facilitate the connection between the heat exchange vertical plate and the heat exchange horizontal plate through the flow divider.

[0035] In some embodiments, the manifold extends through the first support rib in a second direction.

[0036] This reduces the flow resistance, allowing the heat exchange medium to be quickly discharged after heat exchange.

[0037] In some embodiments, the battery cell includes two first sides arranged back to back along a first direction and two second sides arranged back to back along a second 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.

[0038] The expansion of a single battery cell during charging and discharging mainly acts on the limiting beam along the first direction (large surface), which concentrates the expansion force on the limiting beam. The reinforced structure formed by the heat exchange component and the limiting beam more effectively resists expansion deformation and reduces the risk of the housing cracking.

[0039] In some embodiments, the limiting beam has a groove on the side facing the battery cell, the groove being used to accommodate a portion of the current collector.

[0040] This makes it easier to position the thermal management components during installation.

[0041] In some embodiments, the limiting beam has a cavity, the groove is connected to the cavity, and the collectors of two adjacent heat exchangers are connected at the same end along the first direction through a pipe, which is located in the cavity.

[0042] A chamber is set inside the limiting beam, and the groove is connected to the chamber. The connecting pipes between the heat exchanger and the current collector of adjacent heat exchange components are arranged in the chamber. On the one hand, the pipes can be effectively housed and protected, reducing the possibility of leakage caused by the exposed pipes being squeezed and worn. On the other hand, the internal space of the limiting beam can be fully utilized, reducing the occupation of the effective space inside the battery device by the pipes, and improving the structural compactness and space utilization.

[0043] 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.

[0044] Since the electrical equipment includes all the technical features of the aforementioned battery device, its effects are the same as described above, and will not be repeated here.

[0045] In some embodiments, the electrical equipment is a vehicle, and the vehicle's direction of travel is the same as the first direction.

[0046] By setting the vehicle's direction of travel to be the same as the first direction, the direction of the expansion force generated by the battery cells during the charge and discharge cycle is consistent with the vehicle's direction of travel. The reinforced structure formed by the limiting beam and the heat exchange component can better withstand, transmit, and disperse the expansion stress, further reducing the risk of deformation and cracking of the mounting beam of the battery box under the combined action of vehicle driving vibration and battery expansion, and improving the reliability of the mounting beam connection during vehicle operation.

[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: Figure 1 This is a schematic diagram of the structure of an electrical device, specifically a vehicle, according to some embodiments of this application. Figure 2 This is an exploded view of a battery device according to some embodiments of this application; Figure 3 This is an isometric view of a heat exchange component of a battery device according to some embodiments of this application; Figure 4 This is a perspective view of the internal structure of a heat exchanger in a battery device according to some embodiments of this application; Figure 5 This is an isometric view of the heat exchanger plate of a heat exchanger element in a battery device according to some embodiments of this application. Figure 6 This is a structural diagram of a heat exchanger in a battery device according to some embodiments of this application; Figure 7 for Figure 6 AA section view; Figure 8 for Figure 7 A magnified view of a portion of point I; Figure 9 for Figure 6 BB section view; Figure 10 for Figure 6 CC section view; Figure 11 This is a bottom view of the current collector of a heat exchanger in a battery device according to some embodiments of this application.

[0049] The reference numerals in the detailed embodiments are as follows: 1000, vehicle; 200, controller; 300, motor; 100. Battery device; 110. Box body; 111. Limiting beam; 1111. Groove; 1112. Chamber; 112. Mounting beam; 120. Battery cell assembly; 121. Battery cell; 1211. First side surface; 1212. Second side surface; 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 plate; 131211, First chamber; 13122, Second plate; 131221, Second chamber; 13123, First heat exchange channel; 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; X, first direction; Y, second direction; Z, altitude direction. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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).

[0056] 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.

[0057] 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.

[0058] Currently, the individual cells inside the battery generate continuous expansion force during the cyclic charging and discharging process. If the casing is subjected to this repeated expansion force for a long time, it will cause a decrease in structural strength, making it prone to cracking, severe deformation and other failures, which will affect the safety and service life of the battery device.

[0059] In view of this, this application provides a battery device and electrical equipment. By connecting the main body of the heat exchanger to the limiting beam of the housing, and connecting the current collector to one side of the main body along the height direction of the housing, the structural strength and deformation resistance of the limiting beam are improved. During the expansion force generated by the cyclic charging and discharging of the battery cells, the main body can strengthen the limiting beam, reducing the risk of deformation and cracking of the limiting beam, thereby improving the overall structural stability and service life of the battery housing. At the same time, the current collector is located at the top of the heat exchanger. Compared with the current collector being located at both ends of the main body and connected to the limiting beam, this reduces the possibility of the current collector being pulled apart from the main body during expansion, which could cause leakage of the heat exchange medium and improve the reliability of the thermal management components.

[0060] 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.

[0061] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 333LiNi 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.

[0077] 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.

[0078] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0085] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0086] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] Liquid electrolytes include electrolyte salts and solvents.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid – lithium salt.

[0096] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0097] 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.

[0098] 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.

[0099] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0100] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0101] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0102] In some embodiments, the electrode assembly has a stacked structure.

[0103] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0104] 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.

[0105] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0106] As an example, multiple separators can be provided, each positioned between any two adjacent positive and negative electrodes.

[0107] As an example, the separator can be continuously arranged between any adjacent positive and negative electrode plates by folding or rolling.

[0108] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal in shape.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0117] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] For ease of explanation, the following embodiments use an electrical device from some embodiments of this application as an example.

[0122] The electrical equipment includes a battery device 100 according to various embodiments, which is used to provide electrical energy to the electrical equipment.

[0123] 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.

[0124] Figure 1 This 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.

[0125] For ease of explanation, the following embodiments use a battery device 100 from some embodiments of this application as an example.

[0126] Please refer to Figure 2The battery device 100 includes a housing 110, a battery cell assembly 120, and a thermal management component 130. The housing 110 has an accommodating space and includes limiting beams 111. The battery cell assembly 120 is disposed within the accommodating space, and limiting beams 111 are respectively provided on both sides of the battery cell assembly 120 along a first direction X. The thermal management component 130 is disposed within the accommodating space and includes multiple heat exchange elements 131 arranged along a second direction Y. A battery cell 121 is thermally connected between adjacent heat exchange elements 131. Each heat exchange element 131 includes a current collector 1311 and a body portion. Along the height direction Z of the housing 110, the current collector 1311 is disposed on one side of the body portion and connected to the body portion. Both the current collector 1311 and the body portion extend along the first direction X. The body has internal heat exchange channels. The current collector 1311 is configured to introduce the heat exchange medium into the heat exchange channels and to discharge the heat exchange medium within the heat exchange channels. The body is connected to limiting beams 111 on both sides of the battery cell assembly 120 along the first direction X. The first direction X intersects with the second direction Y. The plane containing the first direction X and the second direction Y intersects with the height direction Z of the housing 110.

[0127] The limiting beam 111 is a beam-shaped structural component on the box 110 along the expansion direction of the battery cell 121, mainly used to bear and resist the expansion force of the battery cell 121.

[0128] Multiple battery cells 121 can be arranged along a first direction X to form a battery cell assembly 120, and the number of battery cell assemblies 120 can be one or more. When there are multiple battery cell assemblies 120, they are arranged sequentially along a second direction Y or the arrangement direction of multiple heat exchange elements 131.

[0129] The number of battery cells 121 between two adjacent heat exchangers 131 can be one or more.

[0130] The connection methods between the main body and the limiting beam 111 include, but are not limited to, welding, riveting, or integral molding.

[0131] The housing 110 can have the structures listed above, which will not be described in detail here. The housing 110 can be formed from plastic by injection molding, or it can be made of metal, or it can be a composite of metal and plastic.

[0132] 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.

[0133] 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.

[0134] The connection methods between the current collector 1311 and the main body include, but are not limited to, welding, bonding, or integral molding.

[0135] By connecting the body of the heat exchanger 131 to the limiting beam 111 of the housing 110, and connecting the current collector 1311 above the body, the structural strength and deformation resistance of the limiting beam 111 are improved. During the expansion force generated by the cyclic charging and discharging of the battery cell 121, the body can reinforce the limiting beam 111, reducing the risk of deformation and cracking of the limiting beam 111, thereby improving the overall structural stability and service life of the battery housing 110. At the same time, the current collector 1311 is located at the top of the heat exchanger 131. Compared with the current collector 1311 being located at both ends of the body and connected to the limiting beam 111, this reduces the possibility of the current collector 1311 being pulled apart from the body during expansion, which could cause leakage of the heat exchange medium and improve the reliability of the thermal management component 130.

[0136] In some embodiments, please continue to refer to Figure 2 The main body includes only the heat exchange plate 1312. The side of the battery cell 121 along the second direction Y is thermally connected to the heat exchange plate 1312, and the current collector 1311 is connected to the top of the heat exchange plate 1312.

[0137] Along the height direction Z of the housing 110, the total size of the heat exchange vertical plate 1312 and the current collector 1311 is roughly the same as the size of the battery cell 121, or it can be slightly smaller than the size of the battery cell 121, so as to maximize the heat exchange area between the heat exchange component 131 and the battery cell 121.

[0138] The heat exchange vertical plate 1312 can be made of metal or plastic. Specifically, it can be formed by injection molding or extrusion molding to form heat exchange channels inside, which are connected to the collector 1311.

[0139] Compared with the heat exchange vertical plate 1312 having the collector 1311 located at both ends and connected to the limiting beam 111, the heat exchange vertical plate 1312 can be pulled apart during the expansion process, which can reduce the possibility of heat exchange medium leakage caused by the collector 1311 being pulled apart during the expansion process, thus improving the reliability of the thermal management component 130.

[0140] In some embodiments, please continue to refer to Figure 2 The main body includes a heat exchange vertical plate 1312 and a heat exchange horizontal plate 1313. The heat exchange horizontal plate 1313 is located on the side of the heat exchange vertical plate 1312 away from the current collector 1311. The heat exchange horizontal plate 1313 intersects with and is connected to the heat exchange vertical plate 1312. At least one of the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 is connected to the limiting beams 111 on both sides of the battery cell assembly 120 along the first direction X at both ends. The heat exchange horizontal plates 1313 of the plurality of heat exchange elements 131 form the bottom wall of the housing 110; or, the housing 110 includes a bottom wall, and the heat exchange horizontal plate 1313 is located on the side of the heat exchange vertical plate 1312 away from the bottom wall.

[0141] The heat exchange horizontal plate 1313 can be perpendicular to the heat exchange vertical plate 1312.

[0142] As an example, a heat exchange plate 1313 is disposed at the bottom of the battery cell 121, and the heat exchange plates 1313 of multiple heat exchange components 131 form the bottom wall of the housing 110.

[0143] As another example, the heat exchange plate 1313 is disposed on the top of the battery cell 121, and two adjacent battery cells 121 along the second direction Y are connected to the same heat exchange plate 1313, which can be by bonding, screw connection or snap-fit, etc.

[0144] The heat exchange horizontal plate 1313 is connected to the heat exchange vertical plate 1312 via the current collector 1311, and the heat exchange channels within the heat exchange horizontal plate 1313 are connected to the heat exchange channels within the heat exchange vertical plate 1312 via the current collector 1311. By bonding the heat exchange horizontal plate 1313 to two adjacent battery cells 121, the overall rigidity of the battery device 100 can be improved, and the possibility of electrical connection failure due to excessive expansion of the two adjacent battery cells 121 along the height Z direction of the housing 110 can be reduced (the electrode terminals of two adjacent battery cells 121 are generally electrically connected via a busbar).

[0145] In the two heat exchange components 131 that are furthest apart along the second direction Y, the end of the heat exchange horizontal plate 1313 facing away from the battery cell 121 along the second direction Y is flush with the end of the heat exchange vertical plate 1312 facing away from the battery cell 121 along the second direction Y. This reduces the amount of space occupied by the part of the heat exchange horizontal plate 1313 that is not thermally connected to the battery cell 121, which is beneficial to improving the space utilization of the housing 110, allowing the battery cell 121 to be made larger, and improving the volumetric energy density of the battery device 100 without changing the housing space of the housing 110.

[0146] Among the remaining heat exchangers 131 between the two heat exchangers 131 that are furthest apart along the second direction Y, the two ends of the heat exchange horizontal plate 1313 along the second direction Y are spaced apart from the two sides of the heat exchange vertical plate 1312 along the second direction Y. The heat exchange vertical plate 1312 can be located at the middle position of the heat exchange horizontal plate 1313 along the second direction Y, or it can be located at a position away from the middle position of the heat exchange horizontal plate 1313 along the second direction Y.

[0147] When the heat exchange horizontal plate 1313 is disposed at the bottom of the battery cell 121, adjacent heat exchange horizontal plates 1313 can be spaced apart or abutted together along the second direction Y. When the heat exchange horizontal plate 1313 is disposed at the top of the battery cell 121, adjacent heat exchange horizontal plates 1313 are spaced apart along the second direction Y to avoid the heat exchange horizontal plate 1313 from the electrode terminals of the battery cell 121, thereby facilitating the electrical connection between adjacent battery cells 121.

[0148] The heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 can be fixed together by welding, bonding or integral molding.

[0149] The connection method between at least one of the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 and the limiting beam 111 includes, but is not limited to, welding, riveting or integral molding.

[0150] The heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 may or may not be connected. When they are not connected, each can be supplied with heat exchange medium through a separate pipe 132 and can be discharged from the heat exchange medium through a separate pipe 132. The inlet and outlet pipes 132 mentioned here are not the same pipe 132. When they are connected, the inlet pipe 132 and the outlet pipe 132 are shared.

[0151] Therefore, on the one hand, increasing the thermally conductive contact area with the battery cell 121 is beneficial to improving heat exchange efficiency; on the other hand, the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 are connected to form a reinforcing beam, and at least one of them is directly connected to the limiting beam 111 at both ends along the first direction X, further improving the structural rigidity of the limiting beam 111, better resisting the force brought by the cyclic expansion of the battery cell 121, and effectively suppressing the deformation and cracking of the housing 110. In other examples, the main body may only be provided with the heat exchange vertical plate 1312.

[0152] In some embodiments, please refer to Figures 3-7 The heat exchange channels include a first heat exchange channel 13123 and a second heat exchange channel 13137. The heat exchange vertical plate 1312 has the first heat exchange channel 13123 inside, and the heat exchange horizontal plate 1313 has the second heat exchange channel 13137 inside. The 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 first direction X. A heat exchange channel 13123 is connected to a distribution channel 13131 and a confluence channel 13132 respectively. A second heat exchange channel 13137 is connected to a distribution channel 13131 and a confluence channel 13132 respectively. One of the distribution channel 13131 and the confluence channel 13132 is configured to introduce the heat exchange medium flowing through the heat exchange vertical plate 1312 into the second heat exchange channel 13137, and the other is configured to discharge the heat exchange medium from the second heat exchange channel 13137.

[0153] Both the diversion channel 13131 and the confluence channel 13132 can be long channels extending along the first direction X.

[0154] The manifold 13132 can guide the heat exchange medium into the heat exchange vertical plate 1312 and then discharge it through the heat exchange vertical plate 1312. The manifold 13132 can also be set at the end of the heat exchange horizontal plate 1313, so that the heat exchange medium can be discharged directly without going through the heat exchange vertical plate 1312.

[0155] By alternately setting the diversion channel 13131 and the confluence channel 13132, a portion of the heat exchange medium flowing through the heat exchange vertical plate 1312 flows into the heat exchange horizontal plate 1313 via the diversion channel 13131 and flows out via the confluence channel 13132. This allows the heat exchange medium to flow from top to bottom from the heat exchange vertical plate 1312 into the heat exchange horizontal plate 1313, and then flow back to the heat exchange vertical plate 1312 for discharge, thus shortening the flow path of the heat exchange medium. Compared to the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 being connected in series, the path for the heat exchange medium to flow into the heat exchange horizontal plate 1313 is shorter, which is beneficial to improving the uniformity of the heat exchange effect of the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 on the battery cell 121.

[0156] In some embodiments, please refer to Figure 7 and Figure 8 The heat exchange horizontal plate 1313 has an internal cavity and a first support rib 13134 and a second support rib 13135 extending along the first direction X. Part of the diversion groove 13131 and part of the confluence groove 13132 are formed on the first support rib 13134. The first support rib 13134 has a second support rib 13135 on at least one side along the second direction Y. The first support rib 13134, the second support rib 13135 and the inner wall of the cavity together define the second heat exchange flow channel 13137.

[0157] The two heat exchangers 131 furthest apart along the second direction Y can have the same or different structures from the rest of the heat exchangers 131. For example, the cross-sectional profiles of the two heat exchangers 131 furthest apart along the second direction Y can be L-shaped or T-shaped, while the cross-sectional profiles of the rest of the heat exchangers 131 can be T-shaped.

[0158] As an example, in the two heat exchange components 131 that are furthest apart along the second direction Y, the end of the heat exchange horizontal plate 1313 facing away from the battery cell 121 along the second direction Y is flush with the end of the heat exchange vertical plate 1312 facing away from the battery cell 121 along the second direction Y. The first support rib 13134 may only have a second support rib 13135 on one side along the second direction Y, that is, the second support rib 13135 is provided on the side of the heat exchange vertical plate 1312 facing the battery cell 121.

[0159] As another example, among the remaining heat exchangers 131 between the two heat exchangers 131 furthest apart along the second direction Y, the heat exchange horizontal plate 1313 is spaced apart from both sides of the heat exchange vertical plate 1312 along the second direction Y at both ends along the second direction Y. The second support rib 13135 may be provided only on one side of the first support rib 13134 along the second direction Y, or the second support rib 13135 may be provided on both sides of the first support rib 13134 along the second direction Y. The number of second support ribs 13135 on the same side of the first support rib 13134 along the second direction Y can be one or more; when there are multiple second support ribs, they are spaced apart along the second direction Y.

[0160] Inside the heat exchange horizontal plate 1313, a first support rib 13134 and a second support rib 13135 extending along the first direction X are provided. On the one hand, the first support rib 13134 and the second support rib 13135 can effectively enhance the structural strength and deformation resistance of the heat exchange horizontal plate 1313, and provide reliable support for the heat exchange plate during the expansion of the battery cell 121, reducing the risk of the second heat exchange channel 13137 collapsing or becoming blocked due to stress. On the other hand, the second heat exchange channel 13137 is defined by the first support rib 13134, the second support rib 13135 and the inner wall of the accommodating cavity, which can improve the stability and uniformity of the heat exchange medium flow.

[0161] In some embodiments, please continue to refer to Figure 7 and Figure 8 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 second direction Y. The second support rib 13135 on one side of the first support rib 13134 along the second direction Y, 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 on the other side of the first support rib 13134 along the second direction Y, 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 divider 13131 is connected to the first branch channel 131371 and the second branch channel 131372 respectively. The flow collector 13132 is connected to the first branch channel 131371 and the second branch channel 131372 respectively.

[0162] The structures of the first branch flow channel 131371 and the second branch flow channel 131372 can be the same or different. As an example, the first branch flow channel 131371 and the second branch flow channel 131372 are arranged symmetrically with respect to the heat exchange vertical plate 1312.

[0163] The second support rib 13135 and the first support rib 13134 may be parallel to each other or not.

[0164] Both the first support rib 13134 and the second support rib 13135 can be elongated structures, and their length direction can be the same as the first direction X.

[0165] Therefore, the heat exchange medium can flow into the first branch channel 131371 and the second branch channel 131372 simultaneously through the diversion channel 13131, and flow out through the confluence channel 13132, so that the heat exchange medium can flow into different positions of the heat exchange plate 1313 evenly, which is beneficial to improving the overall heat exchange capacity of the heat exchange plate 1313.

[0166] In some embodiments, please continue to refer to Figure 7 and Figure 8The 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 first direction X. 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 second direction Y. The third supporting rib 13136 is located on one side of the second supporting rib 13135 and is connected to one end of the second supporting rib 13135. Along the first direction X, 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.

[0167] The first sealing element 1314 can be welded to the heat exchange horizontal plate 1313, or it can be integrally molded with the heat exchange horizontal plate 1313 by injection molding. The heat exchange vertical plate 1312 can share the same sealing element with the heat exchange horizontal plate 1313, that is, the first sealing element 1314 seals the same end of the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313.

[0168] A third support rib 13136 is provided inside the heat exchange horizontal plate 1313, and the third support rib 13136 is connected to the second support rib 13135 and spaced apart from the first sealing member 1314. On the one hand, this can further enhance the structural strength and resistance to expansion and deformation of the heat exchange horizontal plate 1313, and improve the overall structural stability of the heat exchange component 131. On the other hand, the third support rib 13136, the second support rib 13135, the first sealing member 1314, and the inner wall of the receiving cavity jointly define a portion that communicates with the flow divider 13131, forming a bent second heat exchange channel 13137, which is beneficial to improving the heat exchange efficiency of the heat exchange horizontal plate 1313. In other examples, the third support rib 13136 may not be provided.

[0169] In some embodiments, please refer to Figure 8 The side wall of the diversion channel 13131 is provided with an outlet 13133 that communicates with the diversion channel 13131. Along the first direction X, 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, and is connected to the second heat exchange channel 13137.

[0170] A flow divider 13131 is provided on the surface of the heat exchange horizontal plate 1313 facing the heat exchange vertical plate 1312. The flow divider 13131 can extend along the thickness direction of the heat exchange horizontal plate 1313 to the first support rib 13134. An outlet 13133 is provided on the side wall of the first support rib 13134. The outlet 13133 is connected to the flow divider 13131 and the second heat exchange channel 13137 respectively.

[0171] The third support rib 13136 allows the heat exchange medium to flow from one end of the heat exchange horizontal plate 1313 to the other end, and then flow in a roundabout manner from the other end, thereby increasing the flow path of the heat exchange medium in the heat exchange horizontal plate 1313, making the heat exchange horizontal plate 1313 and the battery cell 121 exchange heat more fully, which is beneficial to improving the heat exchange efficiency.

[0172] In some embodiments, please continue to refer to Figure 8 The first support rib 13134 is provided with a third support rib 13136 on both sides along the second direction Y. The third support ribs 13136 on both sides of the first support rib 13134 along the second direction Y are all located on the same side of the second support rib 13135. Each third support rib 13136 located on the same side of the second support rib 13135 and the first sealing member 1314 are spaced apart and together form a part of the second heat exchange channel 13137 that is connected to the diversion channel 13131.

[0173] The third support ribs 13136 on both sides of the first support rib 13134 along the second direction Y can be symmetrically arranged relative to the heat exchange vertical plate 1312, or they can be asymmetrically arranged, that is, at least one of the lengths or widths of the third support ribs 13136 on both sides of the first support rib 13134 along the second direction Y is not equal.

[0174] Therefore, on the one hand, the heat exchange effect of the flow channels on both sides of the first support rib 13134 can be made to be roughly the same, and both can form bent flow channels, which is conducive to improving heat exchange efficiency; on the other hand, it can improve the consistency of the heat exchange effect of the flow channels on both sides of the first support rib 13134 along the second direction Y.

[0175] In some embodiments, please refer to Figure 4 , Figure 9 and Figure 10 The heat exchange vertical plate 1312 has a first chamber 131211 and a second chamber 131221 inside. The first chamber 131211 and the second chamber 131221 are arranged at intervals along the first direction X. The first chamber 131211 is connected to the flow divider 13131, and the second chamber 131221 is connected to the flow collector 13132. The first chamber 131211 and the second chamber 131221 together form the first heat exchange channel 13123. The collector 1311 has a first port and a second port corresponding to each other at both ends along the first direction X. The first chamber 131211 is connected to the first port, and the second chamber 131221 is connected to the second port.

[0176] The number of both the first chamber 131211 and the second chamber 131221 can be one or more.

[0177] The shapes of the first chamber 131211 and the second chamber 131221 are not specifically limited. For example, they can be circular, square, or polygonal.

[0178] One of the first port and the second port can be used as the heat exchange medium inlet, and the other can be used as the heat exchange medium outlet.

[0179] By setting a first chamber 131211 and a second chamber 131221 arranged at intervals along the first direction X in the heat exchange vertical plate 1312, and connecting the first chamber 131211 to the diversion channel 13131 and the second chamber 131221 to the confluence channel 13132, and simultaneously setting a first port and a second port at both ends of the collector 1311 to connect to the first chamber 131211 and the second chamber 131221 respectively, the heat exchange medium can achieve directional and zoned flow between the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313. This ensures that the heat exchange medium does not interfere with each other during the diversion, heat exchange, and confluence processes, which helps to reduce the flow resistance of the heat exchange medium and effectively improves the stability and uniformity of the heat exchange medium flow, thereby improving the consistency and efficiency of heat exchange for the battery cell 121.

[0180] In some embodiments, please refer to Figure 4 , Figure 9 - Figure 11 The current collector 1311 includes a first current collector cavity 13111 and a second current collector cavity 13112. The first current collector cavity 13111 and the second current collector cavity 13112 are arranged at intervals along the second direction Y. The first chamber 131211 is connected to the first port through the first current collector cavity 13111, and the second chamber 131221 is connected to the second port through the second current collector cavity 13112.

[0181] The first collecting cavity 13111 can penetrate one end of the current collector 1311, but not the other end. The second collecting cavity 13112 can penetrate the other end of the current collector 1311, but not one end. Whether it's the first collecting cavity 13111 or the second collecting cavity 13112, the non-penetrating portion can be sealed with a plug, or it can be sealed with a partition or baffle formed by the internal wall structure of the current collector 1311.

[0182] The first chamber 131211 is provided with a first communication port 13115 that communicates with the first collection chamber 13111, and the second chamber 131221 is provided with a second communication port 13116 that communicates with the second collection chamber 13112.

[0183] Along the second direction Y, the orthographic projections of the first collector cavity 13111 and the second collector cavity 13112 onto the collector cavity 1311 can at least partially overlap, that is, the first collector cavity 13111 and the second collector cavity 13112 share a portion of the wall.

[0184] By setting a first collecting cavity 13111 and a second collecting cavity 13112 arranged at intervals along the second direction Y inside the current collector 1311, the first chamber 131211 is connected to the first port through the first collecting cavity 13111, and the second chamber 131221 is connected to the second port through the second collecting cavity 13112. This enables the heat exchange medium to flow independently and without interference within the current collector 1311, reducing the mixing of the heat exchange medium entering and exiting the current collector 1311. This is beneficial for improving the consistency of heat exchange and temperature control effect of the battery cell 121.

[0185] In some embodiments, the current collector 1311 further includes a first plug 13113 and a second plug 13114. The first plug 13113 and the second plug 13114 are connected one-to-one at both ends of the current collector 1311 along the first direction X. The first plug 13113 blocks the second current collector cavity 13112 and has a first port that communicates with the first current collector cavity 13111. The second plug 13114 blocks the first current collector cavity 13111 and has a second port that communicates with the second current collector cavity 13112.

[0186] Both the first plug 13113 and the second plug 13114 can be connected to the collector 1311 by welding or integral molding.

[0187] By setting a first plug 13113 and a second plug 13114 at both ends of the collector 1311 along the first direction X, the first plug 13113 blocks the second collector cavity 13112 and opens a first port communicating with the first collector cavity 13111, and the second plug 13114 blocks the first collector cavity 13111 and opens a second port communicating with the second collector cavity 13112, the first collector cavity 13111 and the second collector cavity 13112 can be reliably separated and independently connected inside the collector 1311, reducing the occurrence of internal short circuits and mixed flow of the heat exchange medium during the entry and exit process, thereby improving the uniformity of heat exchange medium distribution and heat exchange efficiency.

[0188] In some embodiments, please refer to Figure 4 The heat exchange vertical plate 1312 includes a first plate 13121 and a second plate 13122. The first plate 13121 and the second plate 13122 are arranged along a first direction X. The first plate 13121 and the second plate 13122 are respectively connected to the heat exchange horizontal plate 1313. The first plate 13121 has a first chamber 131211 inside, and the second plate 13122 has a second chamber 131221 inside.

[0189] The first plate 13121 and the second plate 13122 may be connected or not connected.

[0190] The first plate 13121 and the second plate 13122 are connected, for example by welding, which can improve the overall strength of the heat exchanger 131.

[0191] The first chamber 131211 and the second chamber 131221 are isolated from each other within the heat exchange vertical plate 1312, and are connected by the heat exchange horizontal plate 1313. That is, at least one partition rib is provided between the first chamber 131211 and the second chamber 131221 to separate them.

[0192] The heat exchange vertical plate 1312 is configured as a structure in which the first plate body 13121 and the second plate body 13122 are separately formed. This facilitates the separate processing and forming of the first chamber 131211 and the second chamber 131221, reduces the processing difficulty of the internal flow channels of the heat exchange vertical plate 1312, and helps to reduce production costs. In other examples, the heat exchange vertical plate 1312 can also be manufactured from a single plate, that is, the first plate body 13121 and the second plate body 13122 are integrally formed.

[0193] In some embodiments, please refer to Figure 2 There are multiple first chambers 131211, which are spaced apart along the first direction X, and each first chamber 131211 is connected to the diversion channel 13131.

[0194] Multiple first chambers 131211 are configured and arranged at intervals along the first direction X. Each first chamber 131211 is connected to the distribution channel 13131, which facilitates a more uniform distribution of the heat exchange medium into the second heat exchange channel 13137 of the heat exchange horizontal plate 1313. This improves the uniformity of the heat exchange medium distribution throughout the entire heat exchange component 131, thereby enhancing the consistency of heat exchange in the battery cell 121 and improving the heat exchange effect. Simultaneously, the spaced arrangement of multiple first chambers 131211 forms multi-point support within the heat exchange vertical plate 1312, improving the structural strength and deformation resistance of the heat exchange vertical plate 1312. This better resists the forces generated by the expansion of the battery cell 121 and reduces the risk of channel blockage or leakage caused by deformation of the heat exchange vertical plate 1312 under stress.

[0195] In some embodiments, please continue to refer to Figure 2 There are multiple second chambers 131221, which are spaced apart along the first direction X, and each second chamber 131221 is connected to a manifold 13132.

[0196] By configuring multiple second chambers 131221 and arranging them at intervals along the first direction X, with each second chamber 131221 connected to the manifold 13132, the heat exchange medium can be synchronously and uniformly converged at multiple locations after heat exchange is completed. This reduces the increased flow resistance and temperature unevenness caused by localized poor flow convergence, further improving the smoothness of heat exchange medium convergence and the overall heat exchange uniformity. Simultaneously, the spaced distribution of multiple second chambers 131221 forms multi-point support within the heat exchange vertical plate 1312, improving the structural strength and deformation resistance of the heat exchange vertical plate 1312, better resisting the expansion force of the battery cells 121, and reducing the risk of flow channel deformation and leakage.

[0197] In some embodiments, please refer to Figure 9 The heat exchange horizontal plate 1313 has a receiving cavity and a first support rib 13134 inside. The first support rib 13134 is located in the receiving cavity and extends along the first direction X. Along the height direction Z of the box body 110, the projection of the heat exchange vertical plate 1312 on the heat exchange horizontal plate 1313 at least partially overlaps with the first support rib 13134.

[0198] The width of the first support rib 13134 can be less than or equal to the thickness of the heat exchange vertical plate 1312, or it can be greater than the thickness of the heat exchange vertical plate 1312.

[0199] As an example, the first support rib 13134 and the heat exchange vertical plate 1312 are both located at the middle position of the heat exchange horizontal plate 1313 along the second direction Y.

[0200] A flow channel 13131 is provided on the first support rib 13134 to facilitate the introduction of the heat exchange medium from the heat exchange vertical plate 1312 into the heat exchange horizontal plate 1313. The first support rib 13134 can prevent the heat exchange vertical plate 1312 from crushing the flow channel of the heat exchange horizontal plate 1313, so that the flow channel in the heat exchange horizontal plate 1313 can work reliably and stably.

[0201] In some embodiments, along the second direction Y, the manifold 13132 passes through the first support rib 13134.

[0202] The manifold 13132 can pass through one or both sides of the first support rib 13134 along the second direction Y.

[0203] For example, along the second direction Y, in the two heat exchangers 131 that are furthest apart, the confluence channel 13132 can penetrate one side of the first support rib 13134. Along the second direction Y, in the remaining heat exchangers 131 between the two furthest heat exchangers 131, the confluence channel 13132 can penetrate both sides of the first support rib 13134, so that the aforementioned first branch flow channel 131371 and second branch flow channel 131372 can both converge and be discharged from the confluence channel 13132.

[0204] This reduces the flow resistance, allowing the heat exchange medium to be quickly discharged after heat exchange.

[0205] In some embodiments, please refer to Figure 2 The battery cell 121 includes two first side surfaces 1211 arranged opposite to each other along a first direction X and two second side surfaces 1212 arranged opposite to each other along a second direction Y. 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.

[0206] The expansion of the battery cell 121 during charging and discharging mainly acts on the limiting beam 111 along the first direction X (large surface), which can concentrate the expansion force on the limiting beam 111. The reinforced structure formed by the heat exchanger 131 and the limiting beam 111 more effectively resists the expansion deformation and reduces the risk of cracking of the housing 110.

[0207] In some embodiments, please continue to refer to Figure 2 The limiting beam 111 has a groove 1111 on the side facing the battery cell 121, and the groove 1111 is used to accommodate part of the current collector 1311.

[0208] This makes it easier to position the thermal management component 130 during installation.

[0209] In some embodiments, please continue to refer to Figure 2 The limiting beam 111 has a chamber 1112, and the groove 1111 is connected to the chamber 1112. The collectors 1311 of two adjacent heat exchangers 131 are connected at the same end along the first direction X through a pipe 132, which is located inside the chamber 1112.

[0210] Multiple heat exchangers 131 can be connected in series and / or in parallel via pipes 132.

[0211] The groove 1111 can penetrate the top of the side wall of the limiting beam 111, so that a part of the current collector 1311 can be directly inserted into the groove 1111 from the top during installation, thereby facilitating the positioning of the heat exchanger 131.

[0212] A chamber 1112 is provided inside the limiting beam 111, and the groove 1111 is connected to the chamber 1112. 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.

[0213] In one specific alternative embodiment of the battery device 100, please refer to Figure 2 - Figure 11 The battery device 100 includes a housing 110, a battery cell assembly 120, and a thermal management component 130. The housing 110 has an accommodating space and includes limiting beams 111. The battery cell assembly 120 is disposed within the accommodating space, and limiting beams 111 are respectively provided on both sides of the battery cell assembly 120 along a first direction X. The thermal management component 130 is disposed within the accommodating space and includes multiple heat exchange elements 131 arranged along a second direction Y. A battery cell 121 is thermally connected between adjacent heat exchange elements 131.

[0214] The heat exchanger 131 includes a current collector 1311, a heat exchange vertical plate 1312, and a heat exchange horizontal plate 1313. The current collector 1311 is connected to the top of the heat exchange vertical plate 1312 and extends along a first direction X. The side of the battery cell 121 along a second direction Y is thermally connected to the heat exchange vertical plate 1312. The heat exchange horizontal plate 1313 is thermally connected to the bottom or top of the battery cell 121. The heat exchange horizontal plate 1313 intersects with and is connected to the heat exchange vertical plate 1312. At least one of the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 is connected one-to-one with the limiting beams 111 on both sides of the battery cell assembly 120 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 housing 110.

[0215] The two heat exchangers 131 that are furthest apart along the second direction Y are defined as the first heat exchanger, and the heat exchanger 131 between the two first heat exchangers is defined as the second heat exchanger.

[0216] The heat exchange channel includes a first heat exchange channel 13123 and a second heat exchange channel 13137. The heat exchange vertical plate 1312 has the first heat exchange channel 13123 inside, and the heat exchange horizontal plate 1313 has the second heat exchange channel 13137 inside. The 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 first direction X. The first heat exchange channel 13123 is connected to the flow divider 13131 and the flow collector 13132 respectively, and the second heat exchange channel 13137 is connected to the flow divider 13131 and the flow collector 13132 respectively.

[0217] In the first heat exchanger, a second support rib 13135 is provided on one side of the first support rib 13134 along the second direction Y, and the second support rib 13135 is provided on the side of the heat exchange vertical plate 1312 facing the battery cell 121. The first support rib 13134, the second support rib 13135, the third support rib 13136 and part of the inner wall of the receiving cavity together define the second heat exchange flow channel 13137.

[0218] 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 second direction Y. The first support rib 13134, along with the second support rib 13135, the first support rib 13134, the third support rib 13136 on one side of the second direction Y, and a portion of the inner wall of the receiving cavity, together define the first branch flow channel 131371. The second support rib 13135, the first support rib 13134, the third support rib 13136 on the other side of the second direction Y, and another portion of the inner wall of the receiving cavity, together define the second branch flow channel 131372. The flow divider 13131 is connected to the first branch flow channel 131371 and the second branch flow channel 131372 respectively. The flow converger 13132 is connected to the first branch flow channel 131371 and the second branch flow channel 131372 respectively.

[0219] The heat exchanger 131 also includes a first sealing member 1314. The heat exchanger plate 1313 has first sealing members 1314 at both ends along the first direction X. One first sealing member 1314 seals one end of the receiving cavity, and the other first sealing member 1314 seals the other end of the receiving cavity. The heat exchanger plate 1313 has a third supporting rib 13136 inside. The first supporting rib 13134 has a third supporting rib 13136 on at least one side along the second direction Y. The third supporting rib 13136 is located on one side of the second supporting rib 13135 and connected to one end of the second supporting rib 13135. Along the first direction X, 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 together form a portion of the second heat exchange channel 13137 that communicates with the diversion groove 13131. The side wall of the diversion channel 13131 is provided with an outlet 13133 communicating with the diversion channel 13131. Along the first direction X, 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, and is connected to the second heat exchange channel 13137. The first support rib 13134 is provided with third support ribs 13136 on both sides along the second direction Y. The third support ribs 13136 on both sides of the first support rib 13134 along the second direction Y are all located on the same side of the second support rib 13135. Each third support rib 13136 and the first sealing member 1314 located on the same side of the second support rib 13135 are spaced apart and together form a portion of the second heat exchange channel 13137 communicating with the diversion channel 13131.

[0220] The heat exchange vertical plate 1312 has a first chamber 131211 and a second chamber 131221 inside. The first chamber 131211 and the second chamber 131221 are arranged at intervals along a first direction X. The first chamber 131211 is connected to the flow divider 13131, and the second chamber 131221 is connected to the flow collector 13132. The first chamber 131211 and the second chamber 131221 together form a first heat exchange channel 13123. The collector 1311 has a first port and a second port corresponding to each other at both ends along the first direction X. The first chamber 131211 is connected to the first port, and the second chamber 131221 is connected to the second port.

[0221] The current collector 1311 includes a first current collector cavity 13111 and a second current collector cavity 13112. The first current collector cavity 13111 and the second current collector cavity 13112 are arranged at intervals along the second direction Y. The first chamber 131211 is connected to the first port through the first current collector cavity 13111, and the second chamber 131221 is connected to the second port through the second current collector cavity 13112.

[0222] 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 connected to each other at both ends of the current collector 1311 along the first direction X. The first plug 13113 blocks the second current collector cavity 13112 and has a first port that communicates with the first current collector cavity 13111. The second plug 13114 blocks the first current collector cavity 13111 and has a second port that communicates with the second current collector cavity 13112.

[0223] There are multiple first chambers 131211, which are spaced apart along the first direction X, and each first chamber 131211 is connected to the diversion channel 13131. There are also multiple second chambers 131221, which are spaced apart along the first direction X, and each second chamber 131221 is connected to the confluence channel 13132.

[0224] The current collector 1311 is positioned on top of the heat exchange vertical plate 1312, which is connected to the heat exchange horizontal plate 1313 to form an integral structural beam. This beam is also connected to the limiting beam 111, which improves the strength of the limiting beam 111 and reduces its deformation and cracking risk, thereby enhancing the overall structural stability and service life of the battery housing 110. Furthermore, the current collector 1311 is positioned on top of the heat exchange component 131. Compared to the current collector 1311 being positioned at both ends of the main body and connected to the limiting beam 111, this position reduces the possibility of heat exchange medium leakage during expansion due to the current collector 1311 being pulled apart from the main body, thus improving the reliability of the thermal management component 130. Additionally, the heat exchange vertical plate 1312 and the heat exchange horizontal plate 1313 can exchange heat with different surfaces of the battery cell 121. Furthermore, the arrangement of the diversion channel 13131 and the confluence channel 13132 allows the heat exchange medium to flow out from the first collection cavity 13111 and into the heat exchange channel of the heat exchange horizontal plate 1313 via the confluence channel 13132 from the first chamber 131211. The arrangement of the first support rib 13134, the second support rib 13135, and the third support rib 13136 creates a meandering flow path for the heat exchange medium within the heat exchange horizontal plate 1313, ultimately flowing out from the heat exchange horizontal plate 1313 through the confluence channel 13132 to the second chamber 131221, and finally out through the second collection cavity 13112. This structure reduces the flow resistance of the heat exchange medium and shortens the flow path of the heat exchange medium from the heat exchange vertical plate 1312 into the heat exchange horizontal plate 1313, which is beneficial to improving the heat exchange effect of the heat exchanger 131.

[0225] 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 box-shaped enclosure having a receiving space, the box-shaped enclosure including a limiting beam; A battery cell assembly is disposed within the accommodating space, and the limiting beams are respectively provided on both sides of the battery cell assembly along the first direction; A thermal management component is disposed within the accommodating space. The thermal management component includes multiple heat exchange elements arranged along a second direction. The battery cell is thermally connected between two adjacent heat exchange elements. Each heat exchange element includes a current collector and a body portion. Along the height direction of the housing, the current collector is disposed on one side of the body portion and connected to the body portion. Both the current collector and the body portion extend along the first direction. The body portion has a heat exchange channel inside. The current collector is configured to introduce heat exchange medium into the heat exchange channel and to discharge the heat exchange medium within the heat exchange channel. The body portion is connected to the limiting beams located on both sides of the battery cell assembly along the first direction. The first direction and the second direction intersect. The plane containing the first direction and the second direction intersects the height direction of the housing. The main body includes a heat exchange vertical plate and a heat exchange horizontal plate. The heat exchange horizontal plate is located on the side of the heat exchange vertical plate away from the current collector. The heat exchange horizontal plate intersects with and is connected to the heat exchange vertical plate. At least one of the heat exchange vertical plate and the heat exchange horizontal plate is connected to the limiting beams on both sides of the battery cell assembly along the first direction at both ends.

2. The battery device according to claim 1, characterized in that, The heat exchange cross plates of the plurality of heat exchange elements form the bottom wall of the housing; or, the housing includes a bottom wall, and the heat exchange cross plates are located on the side of the heat exchange vertical plate opposite to the bottom wall.

3. The battery device according to claim 1, characterized in that, The heat exchange channel includes a first heat exchange channel and a second heat exchange channel. The heat exchange vertical plate has the first heat exchange channel inside, and the heat exchange horizontal plate has the second heat exchange channel inside. The heat exchange horizontal plate has a diversion groove and a confluence groove on the side facing the heat exchange vertical plate. The diversion groove and the confluence groove are spaced apart along the first direction. The first heat exchange channel is connected to the diversion groove and the confluence groove respectively. The second heat exchange channel is connected to the diversion groove and the confluence groove respectively. One of the diversion groove and the confluence groove is configured to guide the heat exchange medium flowing through the heat exchange vertical plate into the second heat exchange channel, and the other is configured to discharge the heat exchange medium in the second heat exchange channel.

4. The battery device according to claim 3, characterized in that, The heat exchange cross plate has an internal cavity and a first support rib and a second support rib extending along the first direction. Part of the diversion groove and part of the 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 second direction. The first support rib, the second support rib and the inner wall of the cavity together define the second heat exchange channel.

5. The battery device according to claim 4, characterized in that, 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 second direction. The second support rib on one side of the first support rib along the second 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 on the other side of the first support rib along the second direction, together with the first support rib and another portion of the inner wall of the receiving cavity, defines the second branch channel. The diversion groove is connected to the first branch channel and the second branch channel respectively. The confluence groove is connected to the first branch channel and the second branch channel respectively.

6. The battery device according to claim 4, 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 first 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 second 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 first direction, the third supporting rib and the first sealing member located on the same side of the second supporting rib are spaced apart to divide the second heat exchange channel into a bent channel.

7. The battery device according to claim 6, characterized in that, The side wall of the diversion channel is provided with an outlet that communicates with the diversion channel. Along the first direction, the outlet is located between the third support rib and the first sealing member on the same side as the second support rib, and is connected to the second heat exchange channel.

8. The battery device according to claim 6, characterized in that, The first support rib is provided with the third support rib on both sides along the second direction. The third support ribs on both sides of the first support rib along the second direction are all located on the same side of the second support rib. Each third support rib located on the same side of the second support rib and the first sealing member are spaced apart, and the second heat exchange channel is divided into a bent channel.

9. The battery device according to claim 3, characterized in that, The heat exchange vertical plate has a first chamber and a second chamber inside, which are spaced apart along the first direction. The first chamber is connected to the flow divider, and the second chamber is connected to the flow collector. The first chamber and the second chamber together form the first heat exchange channel. The collector has a first port and a second port at its two ends along the first direction. The first chamber is connected to the first port, and the second chamber is connected to the second port.

10. The battery device according to claim 9, characterized in that, The current collector includes a first current collector cavity and a second current collector cavity, which are spaced apart along the second direction. The first cavity is connected to the first port through the first current collector cavity, and the second cavity is connected to the second port through the second current collector cavity.

11. The battery device according to claim 10, characterized in that, The current collector also includes a first plug and a second plug. The first plug and the second plug are connected to each other at both ends of the current collector along the first direction. The first plug blocks the second current collection cavity and has a first port that communicates with the first current collection cavity. The second plug blocks the first current collection cavity and has a second port that communicates with the second current collection cavity.

12. The battery device according to claim 9, characterized in that, The heat exchange vertical plate includes a first plate and a second plate, the first plate and the second plate are arranged along the first direction, the first plate and the second plate are respectively connected to the heat exchange horizontal plate, the first plate has a first chamber inside, and the second plate has a second chamber inside; And / or, the number of the first chambers is multiple, the multiple first chambers are spaced apart along the first direction, and each first chamber is connected to the diversion channel; And / or, the number of the second chambers is multiple, the multiple second chambers are spaced apart along the first direction, and each second chamber is connected to the manifold.

13. The battery device according to claim 4, characterized in that, The heat exchange horizontal plate has an internal receiving cavity and a first supporting rib. The first supporting rib is disposed in the receiving cavity and extends along the first direction. Along the height direction of the box body, the projection of the heat exchange vertical plate on the heat exchange horizontal plate at least partially overlaps with the first supporting rib. And / or, along the second direction, the confluence channel extends through the first support rib.

14. The battery device according to any one of claims 1-13, characterized in that, The battery cell includes two first sides facing away from each other along the first direction and two second sides facing away from each other along the second 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.

15. The battery device according to any one of claims 1-13, characterized in that, The limiting beam has a groove on the side facing the battery cell, and the groove is used to accommodate part of the current collector.

16. The battery device according to claim 15, characterized in that, The limiting beam has a cavity, the groove is connected to the cavity, and the current collectors of two adjacent heat exchangers are connected at the same end along the first direction through a pipe, which is located in the cavity.

17. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-16, the battery device being used to provide electrical energy to the electrical equipment.

18. The electrical equipment according to claim 17, characterized in that, The electrical equipment is a vehicle, and the vehicle's direction of travel is the same as the first direction.

Images