Battery pack and powered device

Abstract

The application provides a battery pack and a power consumption device. The battery pack comprises: a battery pack; a heat exchange plate comprising a heat exchange plate body and a current collecting component, the heat exchange plate body comprising a heat exchange flow channel, a heat exchange medium inlet and a heat exchange medium outlet in communication with the heat exchange flow channel, the current collecting component having a current collecting component inlet and a current collecting component outlet, a pipeline connecting end of the heat exchange plate body, covering the heat exchange medium inlet and the heat exchange medium outlet, forming a current collecting inlet channel in communication with the heat exchange medium inlet and the current collecting component inlet and a current collecting outlet channel in communication with the heat exchange medium outlet and the current collecting component outlet; a box body, the heat exchange plate and the battery pack being located in the box body, two pipe holes corresponding to the current collecting component inlet and the current collecting component outlet being arranged on a box wall of the box body close to the pipeline connecting end; and two connectors, the current collecting component inlet and the current collecting component outlet being connected to the corresponding two pipe holes through the two connectors respectively. The power consumption device comprises the battery pack.

Description

Technical Field

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

[0002] The ambient temperature during battery pack operation and the operating temperature of the battery pack itself affect its performance, necessitating thermal management through a heat exchange system. A heat exchange system typically includes heat exchange plates, inlet pipes for feeding the heat exchange medium to the heat exchange plates, and outlet pipes for discharging the heat exchange medium from the heat exchange plates. In related technologies, excessive temperature differences often exist within the battery pack, which can adversely affect its performance and lifespan. To allow the inlet and outlet pipes for the heat exchange medium to enter and exit the battery pack, two pipe openings are provided on the battery pack housing. However, the piping connecting the heat exchange plates and the two pipe openings within the housing requires considerable space for arrangement.

[0003] The above statements are for the purpose of providing background information in relation to this application only, and do not necessarily constitute prior art. Summary of the Invention

[0004] The purpose of this application is to provide a battery pack and electrical equipment that aims to solve the problems of excessive internal temperature difference in the battery pack and the need for a lot of space to arrange the pipes connecting the heat exchange plate and the two pipe holes inside the box.

[0005] This application provides a battery pack, including a battery assembly; a heat exchange plate, including a heat exchange plate body and a current collector, the heat exchange plate body including a heat exchange channel, a heat exchange medium inlet and a heat exchange medium outlet communicating with the heat exchange channel, the current collector having a current collector inlet and a current collector outlet, disposed at the pipe connection end of the heat exchange plate body, covering the heat exchange medium inlet and the heat exchange medium outlet, forming a current collection inlet channel communicating with the heat exchange medium inlet and the current collector inlet and a current collection outlet channel communicating with the heat exchange medium outlet and the current collector outlet; a housing, the heat exchange plate and the battery assembly being located within the housing, the housing wall near the pipe connection end of the housing having two pipe holes corresponding to the current collector inlet and the current collector outlet respectively; and two connectors, the current collector inlet and the current collector outlet being connected to the corresponding two pipe holes respectively through the two connectors.

[0006] Adding a collector increases the design flexibility of the heat exchange medium inlet and outlet. For example, a suitable number and opening area of ​​heat exchange medium inlets can be set at suitable positions on the heat exchange plate body opposite to the collector inlet channel, and a suitable number and opening area of ​​heat exchange medium outlets can be set at suitable positions on the heat exchange plate body opposite to the collector outlet channel. This facilitates better matching of the heat exchange medium inlet and outlet with the structure of the heat exchange channels in different heat exchange areas and the positions of the inlet and outlet ends. In addition, since the position, number, and opening area of ​​the heat exchange medium inlet and outlet can be flexibly adjusted, it increases the flexibility of the heat exchange channel structure design. The structure of the heat exchange channels in multiple heat exchange areas can be set to make the flow distribution more uniform, thereby helping to reduce the temperature difference inside the battery pack. When the inlet and outlet of the heat exchanger are connected to the pipe holes on the casing wall via connectors, the inlet of the heat exchanger can be connected to the heat exchange medium inlet through the heat exchange medium inlet channel, and the outlet of the heat exchanger can be connected to the heat exchange medium outlet through the heat exchange medium outlet channel. The inlet of the heat exchanger can be positioned as close as possible to the corresponding pipe hole as possible to the heat exchange medium inlet channel, and the outlet of the heat exchanger can be positioned as close as possible to the corresponding pipe hole as possible to the heat exchange medium outlet channel. Therefore, it is beneficial to shorten the pipe length of the heat exchange medium inlet and outlet pipes within the battery pack casing and reduce the complexity of the pipe structure. The functions of the heat exchange medium inlet and outlet pipes within the casing can be realized through connectors, which simplifies the structure, facilitates the assembly of the heat exchange system and the casing, and the structure of the connector is relatively compact, which helps to reduce the internal space occupied by the casing.

[0007] In some embodiments of the battery pack, the heat exchange plate body includes: a flow channel plate including a first groove; a flat panel fixedly connected to the flow channel plate and covering the first groove to form a heat exchange flow channel, the flat panel being provided with a heat exchange medium inlet and a heat exchange medium outlet, and the flow collecting component being fixedly connected to the flat panel and disposed on both sides of the flat panel respectively from the flow channel plate.

[0008] The heat exchange plate body includes a flow channel plate and a flat plate. The current collecting component is fixedly connected to the flat plate and is located on both sides of the flat plate, which facilitates the formation of the heat exchange plate body. The flat plate has a large contact area with the battery cells of the battery pack, which is conducive to heat exchange with the battery cells. The current collecting component inlet, outlet, current collecting inlet channel, and current collecting outlet channel are designed to be more adaptable to the structural design of the heat exchange plate body.

[0009] In some embodiments of the battery pack, the current collection component includes a second trench and a third trench isolated from the second trench. The current collection component inlet is connected to the second trench, and the current collection component outlet is connected to the third trench. The heat exchange plate body forms the current collection inlet channel and the current collection outlet channel with the second trench and the third trench, respectively.

[0010] The current collection component includes a second groove and a third groove isolated from the second groove. The inlet, outlet, current collection introduction channel, and current collection outlet channel of the current collection component can be designed by the structure of the second groove and the third groove, so as to adapt to the structural design of the heat exchange plate body as much as possible.

[0011] In some embodiments of the battery pack, the heat exchange channel includes multiple regional heat exchange channel segments within multiple heat exchange regions; wherein, the heat exchange plate body is provided with multiple heat exchange medium inlets, each heat exchange medium inlet being connected to the inlet end of at least one regional heat exchange channel segment; and / or the heat exchange plate body is provided with multiple heat exchange medium outlets, each heat exchange medium outlet being connected to the outlet end of at least one regional heat exchange channel segment.

[0012] When the heat exchange channel includes multiple regional heat exchange channel sections, the heat exchange plate body is equipped with multiple heat exchange medium inlets. When each heat exchange medium inlet is connected to the inlet end of at least one regional heat exchange channel section, it is beneficial for the heat exchange medium entering the collection and introduction channel to be rationally distributed to the multiple regional heat exchange channel sections through multiple heat exchange medium inlets. This facilitates a more uniform flow distribution among the multiple regional heat exchange channel sections, reduces the temperature difference between the battery cells cooled in the multiple heat exchange areas, and thus helps to reduce the internal temperature difference of the battery pack. The heat exchange plate body is equipped with multiple heat exchange medium outlets, each of which is connected to the outlet end of at least one regional heat exchange channel section. This facilitates the smooth export of the heat exchange medium within the multiple regional heat exchange channel sections to the collection and introduction channel through multiple heat exchange medium outlets. It also facilitates a more uniform flow distribution among the multiple regional heat exchange channel sections, reduces the temperature difference between the battery cells cooled in the multiple heat exchange areas, and thus helps to reduce the internal temperature difference of the battery pack.

[0013] In some embodiments of the battery pack, the heat exchange channel includes a heat exchange channel distribution section extending along the edge of the pipe connection end, the heat exchange medium inlet communicating with the heat exchange channel distribution section, the inlet end of each of the regional heat exchange channel sections communicating with the heat exchange channel distribution section; and / or the heat exchange channel includes a plurality of heat exchange channel confluence sections, at least one of the heat exchange channel confluence sections communicating with the outlet ends of two or more of the regional heat exchange channel sections and a heat exchange medium outlet.

[0014] By setting up heat exchange channel distribution sections, the flow rate of multiple heat exchange channel sections can be rationally distributed within the heat exchange channel, which helps reduce the number of heat exchange medium inlets and the complexity of the flow inlet channel. By setting up multiple heat exchange channel confluence sections, the heat exchange medium can be promptly discharged from each heat exchange channel confluence section to the flow outlet channel through multiple heat exchange medium outlets, which facilitates the uniform distribution of heat exchange medium flow rate within multiple heat exchange channel confluence sections.

[0015] In some embodiments of the battery pack, the heat exchange plate body is provided with one heat exchange medium inlet, the second groove includes a first straight groove portion, the current collector inlet and the heat exchange medium inlet are respectively located at both ends of the first straight groove portion; and / or the heat exchange plate body is provided with multiple heat exchange medium outlets, the third groove includes a U-shaped groove segment and an extension groove segment connected to one free end of the U-shaped groove segment, wherein the current collector outlet is located at the corner of the U-shaped groove segment, and / or one heat exchange medium outlet is located at the corner of the U-shaped groove segment, and / or one heat exchange medium outlet is located at the other free end of the U-shaped groove segment, and / or one heat exchange medium outlet is located at the end of the extension groove segment away from the U-shaped groove segment.

[0016] The inlet of the collector component and the inlet of the heat exchange medium are located at opposite ends of the first straight section of the second groove. This design facilitates the uniform distribution of the heat exchange medium within the heat exchange channel, simplifies the structure of the second groove, shortens the length of the collector inlet channel, and reduces the flow resistance of the heat exchange medium within the collector inlet channel. By providing multiple heat exchange medium outlets on the heat exchange plate body, and including a U-shaped groove section and an extended groove section in the third groove, the structure of the heat exchange channel can be adapted to meet the requirement of converging the heat exchange medium from each outlet into the collector outlet channel, thereby reducing the size and space occupied by the collector component. The outlet of the collector component is located at the corner of the U-shaped groove section, which facilitates the timely exit of the heat exchange medium that has merged with the heat exchange medium outlets at various points in the third groove into the collector outlet channel. One heat exchange medium outlet is located at the corner of the U-shaped groove section, which facilitates the timely exit of the heat exchange medium that has merged with the heat exchange medium that has merged into the collector outlet channel into the collector outlet channel into the collector outlet channel. Another heat exchange medium outlet is located at the other free end of the U-shaped groove section, and / or one heat exchange medium outlet is located at the end of the extension groove section away from the U-shaped groove section. Based on facilitating the timely exit of the heat exchange medium that has merged with the heat exchange medium outlets into the collector outlet channel into the collector outlet channel into the collector outlet channel, the length of the third groove and the collector outlet channel is shortened, reducing the flow resistance of the heat exchange medium in the collector outlet channel.

[0017] In some embodiments of the battery pack, the first straight groove portion and the second straight groove portion of the U-shaped groove segment are both parallel to the edge of the pipe connection end and equidistant from the edge of the pipe connection end. The third straight groove portion of the U-shaped groove segment is located on the side of the second straight groove portion away from the edge of the pipe connection end. The extended groove segment includes an inclined groove portion and a fourth straight groove portion. The fourth straight groove portion is parallel to the first straight groove portion and is further away from the edge of the pipe connection end than the first straight groove portion. The inclined groove portion connects the second straight groove portion and the fourth straight groove portion.

[0018] The structure and position of the second and third grooves facilitate full utilization of the heat exchange plate's surface area. This allows for a reduction in the length of the current collection inlet and outlet channels while still fulfilling the functional requirements of the current collection components, thus lowering the flow resistance of the heat exchange medium within these channels. Furthermore, it reduces the length of the pipes introducing and removing the heat exchange medium from the heat exchange plate within the battery pack's housing, minimizing pipe structural complexity and reducing the internal space occupied by these pipes.

[0019] In some embodiments of the battery pack, the distance between the inlet of the current collector and the edge of the pipe connection end of the heat exchange plate is equal to the distance between the outlet of the current collector and the edge of the pipe connection end of the heat exchange plate.

[0020] The distances between the inlet and outlet of the manifold and the edge of the pipe connection end of the heat exchange plate are equal, which facilitates the arrangement of pipes in the box for introducing heat exchange medium into and out of the heat exchange plate. For example, it is beneficial to use pipes with a uniform structure to reduce the design and manufacturing costs of pipes, and it also facilitates the assembly of the heat exchange system with the box.

[0021] In some embodiments of the battery pack, the current collector inlet and the current collector outlet are located approximately at the same position as the corresponding pipe hole along the extension direction of the casing wall.

[0022] By aligning the two pipe holes approximately with the inlet and / or outlet of the manifold in the direction of the box wall extension, the size of the joint and the internal space occupied by the box can be reduced.

[0023] In some embodiments of the battery pack, the first ends of the two connectors are respectively fixedly connected to the current collector and respectively connected to the current collector inlet and the current collector outlet, and the second ends of the two connectors are respectively fixedly connected to the box wall through the corresponding pipe holes.

[0024] The first ends of the two connectors are fixedly connected to the current collection component and respectively to the inlet and outlet of the current collection component. The second ends of the two connectors pass through the corresponding pipe holes and are fixedly connected to the box wall. The connectors are firmly connected to the current collection component 13 and the box wall, which makes the structure of the connectors more compact and reduces the internal space of the box occupied by the connectors.

[0025] In some embodiments of the battery pack, the connector is welded to the wall of the corresponding bore.

[0026] The connector is welded to the wall of the corresponding pipe hole, eliminating the need for flanges used in related technologies to connect the pipe to the housing, which further helps to reduce the internal space occupied by the pipe in the housing.

[0027] In some embodiments of the battery pack, the connector includes: a first flow channel portion, a first end of which forms a first end of the connector; a second flow channel portion, which is disposed at an angle to the first flow channel portion, the first end of which is connected to a second end of the first flow channel portion; and a tube head, the first end of which is connected to the second flow channel portion, the second end of which forms a second end of the connector.

[0028] The connector includes a first flow channel section, a second flow channel section, and a pipe head. The included angle between the first flow channel section and the second flow channel section allows the first end of the first flow channel section to be aligned with the inlet or outlet of the collector component, and the second end of the second flow channel section to be aligned with the corresponding pipe hole. The pipe head can be connected to the pipeline outside the housing, thereby realizing the function of introducing heat exchange medium into the heat exchange plate or drawing heat exchange medium out of the heat exchange plate.

[0029] In some embodiments of the battery pack, the connector further includes a temperature measuring part, which includes a sensor mounting part; the battery pack includes a temperature sensor configured to detect the temperature of the heat exchange medium within the connector, and the temperature sensor is mounted on the connector via the sensor mounting part.

[0030] Setting up a temperature measurement unit allows the temperature sensor to be integrated onto the connector in order to detect the temperature of the heat exchange medium inside the connector.

[0031] In some embodiments of the battery pack, the connector further includes an extension disposed at a second end of the second flow channel portion and extending away from the second flow channel portion along the extension direction of the first flow channel portion and arranged side by side with the first flow channel portion. The second flow channel portion and the extension portion have welding surfaces that mate with the shape of the corresponding borehole wall.

[0032] The connector also includes an extension, and the second flow channel and the extension have welding surfaces that match the shape of the corresponding pipe hole wall, which facilitates accurate positioning and a firm connection between the connector and the pipe hole.

[0033] In some embodiments of the battery pack, the connector further includes a positioning portion configured to define the relative position of the connector to the heat exchange plate.

[0034] By setting up a positioning part, it is easy to accurately position the joint and the heat exchange plate, which facilitates quick and accurate assembly between the two and between the joint and the box wall.

[0035] In some embodiments of the battery pack, the positioning portion includes: a positioning ring disposed at a first end of the first flow channel portion and configured to insert into or engage with the inlet or outlet of the current collector; and / or a first positioning surface configured to fit against the edge of the pipeline connection end; and / or a second positioning surface configured to fit against the edge of the current collector on the side near the connector; and / or a positioning protrusion configured to engage with a positioning recess shape disposed on the edge of the pipeline connection end.

[0036] The positioning part includes a positioning ring, which facilitates accurate positioning of the connector and the inlet or outlet of the collector component. The positioning part includes a first positioning surface, a second positioning surface and / or positioning protrusions, which all help to achieve accurate positioning of the connector and the heat exchange plate as a whole or in part, thereby facilitating accurate positioning of the connector and the heat exchange plate and making it easy to quickly and accurately assemble the two together and the connector and the box wall.

[0037] In some embodiments of the battery pack, the battery pack further includes an extension and a connecting portion. The extension is disposed at a second end of the second flow channel portion and extends from the second flow channel portion in a direction away from the second flow channel portion along the extension direction of the first flow channel portion and is disposed side by side with the first flow channel portion. The connecting portion is connected to a first end of the first flow channel portion and an end of the extension portion away from the second flow channel portion. A first positioning surface, a second positioning surface, and a positioning protrusion are disposed on the side of the connecting portion away from the second flow channel portion.

[0038] The connecting portion connects the first flow channel and the extension, which helps to enhance the overall strength of the joint without significantly increasing the internal space occupied by the joint, and also helps to increase the connection stability between the joint and the housing and the heat exchange plate. The first positioning surface, the second positioning surface, and / or the positioning protrusion are located on the side of the connecting portion away from the second flow channel, so that the connecting portion integrates at least part of the positioning function of the positioning portion.

[0039] A second aspect of this application provides an electrical device including the battery pack described in the first aspect of this application, the battery pack being used to provide power to the electrical device.

[0040] The electrical equipment provided in this application has the same advantages as the battery pack provided in this application.

[0041] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0042] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0043] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application.

[0044] Figure 2 This is a schematic diagram of the structure of a battery pack according to some embodiments of this application.

[0045] Figure 3 This is a schematic diagram of the combined structure of the battery pack housing and heat exchange system according to some embodiments of this application.

[0046] Figure 4 for Figure 3 A magnified structural diagram of part A.

[0047] Figure 5 for Figure 3 The diagram shows the right-side view of the combined structure.

[0048] Figure 6 for Figure 5 A magnified structural diagram of part B.

[0049] Figure 7 for Figure 3 An exploded view of the heat exchange system of the battery pack in the embodiment shown.

[0050] Figure 8 for Figure 3 The diagram shows a top view of the battery pack in the embodiment shown.

[0051] Figure 9 for Figure 3 The diagram shows a front view of the battery pack in the embodiment shown.

[0052] Figure 10 for Figure 9 A magnified structural diagram of part C.

[0053] Figure 11 for Figure 3 The diagram shows a bottom view of the heat exchange system of the battery pack in the embodiment shown.

[0054] Figure 12 for Figure 3 A schematic diagram of the current collection component of the heat exchange system of the battery pack in the embodiment shown.

[0055] Figure 13 for Figure 3 A three-dimensional structural schematic diagram of the connector of the current collection component of the heat exchange system of the battery pack in the embodiment shown.

[0056] Figure 14 for Figure 12 The diagram shows a front view of the connector.

[0057] Figure 15 for Figure 12 The diagram shows a bottom view of the connector.

[0058] Figures 1 to 15 In the figures, the labels represent:

[0059] D. Electrical equipment;

[0060] B. Battery pack;

[0061] C. Battery box;

[0062] 10. Heat exchange plate; 10A. Heat exchange zone; 10E. Pipe connection end; 101. Heat exchange channel; 1011. Zone heat exchange channel section; 1012. Heat exchange channel distribution section; 1013. Heat exchange channel confluence section; 102. Collector inlet channel; 103. Collector outlet channel; 11. Channel plate; 111. First groove; 12. Flat plate; 12A. Heat exchange medium inlet; 12B. Heat exchange medium outlet; 13. Collector component; 131. Second groove; 1311. First straight groove section; 132. Third groove; 1321. U-shaped groove section; 13211. Corner section; 13212. Second straight groove section; 13213. Third straight groove section; 1322. Extension groove section; 13221. Inclined groove section; 13222. Fourth straight groove section; 13A. Inlet of collector component; 13B. Outlet of collector component;

[0063] 20. Box body; 21. Box wall; 21A. Pipe hole; 22. Expansion beam;

[0064] 30. Connector; 31. First flow channel section; 32. Second flow channel section; 33. Tube head; 34. Temperature measuring section; 34A. Sensor mounting section; 35. Extension section; 301. Welding surface; 36. Connecting section; 37. Positioning section; 371. Positioning ring; 372. First positioning surface; 373. Second positioning surface; 374. Positioning protrusion;

[0065] 40. Battery pack; 41. Individual battery cell;

[0066] 60. Box lid;

[0067] H, Weld. Detailed Implementation

[0068] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0069] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0070] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0071] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0072] In the process of developing this application, the inventors discovered that, as described in the background art, there are problems such as excessive temperature differences inside the battery pack and the pipes connecting the heat exchange plate and the two pipe holes requiring a significant amount of space within the casing. In related technologies, the heat exchange plate (corresponding to the heat exchange plate body of this application) is provided with heat exchange channels and a heat exchange medium inlet and outlet communicating with the heat exchange channels. The heat exchange medium inlet and outlet are respectively connected to an input pipe and an output pipe outside the heat exchange plate. Since each battery pack has only one input and one output pipeline, the corresponding heat exchange plate typically has only one heat exchange medium inlet and one heat exchange medium outlet. Each flow channel within the heat exchange flow path of the heat exchange plate needs to enter and exit the heat exchange medium through one heat exchange medium inlet and one heat exchange medium outlet. The design of the heat exchange flow path, heat exchange medium inlet, and heat exchange medium outlet is limited. For example, it is necessary to limit the number of parallel flow channels, increase the length of series flow channels, and adjust the positions of the heat exchange medium inlet and outlet. This makes it difficult to simultaneously match the positions of the heat exchange medium inlet and outlet with the inlet and outlet ends of the heat exchange flow channel structure of different heat exchange areas. There are inconsistencies in the heat exchange flow channel structure of multiple heat exchange areas, uneven flow distribution, and differences in heat exchange medium temperature. This leads to uneven heat exchange between different battery packs or different battery cells and the heat exchange plate, resulting in excessive temperature differences inside the battery pack. To allow the pipelines supplying the heat exchange medium to the heat exchange plate and the pipelines discharging the heat exchange medium from the heat exchange plate to enter and exit the battery pack, two pipe holes are provided on the battery pack housing. Due to the limited placement of the heat exchange medium inlet and outlet, the two pipe holes are usually staggered from the heat exchange medium inlet and outlet on the flat plate. Therefore, each of the two pipelines typically requires at least two bends in the pipe fittings within the housing, resulting in a significant amount of space being occupied by the pipe fittings within the housing.

[0073] Based on this, this application proposes a battery pack, which adds a current collector with a current collector inlet and a current collector outlet to the heat exchange plate body, and sets two connectors as fittings for each of the two pipelines in the box body. After the heat exchange plate body and the current collector are assembled, a current collector inlet channel connecting the heat exchange medium inlet and the current collector inlet and a current collector outlet channel connecting the heat exchange medium outlet and the current collector outlet are formed. Adding a collector increases the design flexibility of the heat exchange medium inlet and outlet. For example, a suitable number and opening area of ​​heat exchange medium inlets can be set at suitable positions on the heat exchange plate body opposite to the collector inlet channel, and a suitable number and opening area of ​​heat exchange medium outlets can be set at suitable positions on the heat exchange plate body opposite to the collector outlet channel. This facilitates better matching of the setting of the heat exchange medium inlets and outlets with the structure of the heat exchange channels in different heat exchange areas and the positions of the inlet and outlet ends. In addition, since the position and number of heat exchange medium inlets and outlets can be flexibly adjusted, the structural design flexibility of the heat exchange channels is increased. The structure of the heat exchange channels in multiple heat exchange areas can be set to make the flow distribution more uniform, thereby helping to reduce the temperature difference inside the battery pack. When the inlet and outlet of the current collector are connected to the pipe holes on the box wall of the housing through joints, it is beneficial to shorten the pipe length of the pipelines that introduce heat exchange medium into the heat exchange plate and lead heat exchange medium out of the heat exchange plate in the battery pack box and reduce the complexity of the pipe structure. The functions of the pipelines that introduce heat exchange medium into the heat exchange plate and lead heat exchange medium out of the heat exchange plate in the box can be realized through joints, which is beneficial to simplify the structure and facilitate the assembly of the heat exchange system and the box. At the same time, the structure of the joint is relatively compact, which helps to reduce the internal space occupied by the box.

[0074] Furthermore, this application also proposes an electrical device that includes the battery pack.

[0075] The battery pack is configured to provide power to electrical devices. These devices can be, but are not limited to, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0076] A battery pack is a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery pack typically includes a housing for enclosing the one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0077] Multiple battery cells are connected in parallel or series to form a battery pack, which provides higher voltage and capacity. Battery packs can meet the power requirements of different applications. Connecting battery cells in series increases the total voltage, while connecting them in parallel increases the total capacity.

[0078] A battery module is a unit consisting of multiple individual battery cells forming a battery pack. Battery modules typically include a protective structure to safeguard the battery pack from damage caused by the external environment.

[0079] A battery cell refers to the smallest unit that makes up a battery. In this application, a battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., but this application is not limited to these types. A battery cell may be flat, cuboid, or other shapes, but this application is not limited to these shapes either. Battery cells are generally packaged as square battery cells and pouch battery cells, but this application is not limited to these shapes either.

[0080] like Figure 2 and Figure 15 As shown, the battery pack B provided in this embodiment includes a battery pack 40, a heat exchange plate 10, a housing 20, and two connectors 30. The heat exchange plate 10 includes a heat exchange plate body and a collector component 13. The heat exchange plate body includes a heat exchange channel 101, a heat exchange medium inlet 12A communicating with the heat exchange channel 101, and a heat exchange medium outlet 12B. The collector component 13 has a collector component inlet 13A and a collector component outlet 13B, and is disposed at the pipe connection end 10E of the heat exchange plate body, covering the heat exchange medium inlet 12A and the heat exchange medium outlet 12B, forming a collector inlet channel 102 communicating with the heat exchange medium inlet 12A and the collector component inlet 13A, and a collector outlet channel 103 communicating with the heat exchange medium outlet 12B and the collector component outlet 13B. The heat exchange plate 10 and the battery pack 40 are located inside the housing 20. The housing 20 has two pipe holes 21A on its wall 21 near the pipe connection end 10E, corresponding to the inlet 13A and outlet 13B of the collector component, respectively. The inlet 13A and outlet 13B of the collector component are connected to the corresponding two pipe holes 21A through two connectors 30.

[0081] In the battery pack B of this application embodiment, the addition of the current collector 13 increases the design flexibility of the heat exchange medium inlet 12A and the heat exchange medium outlet 12B. For example, a suitable number and opening area of ​​heat exchange medium inlets 12A can be set at suitable positions on the heat exchange plate body opposite to the current collection inlet channel 102, and a suitable number and opening area of ​​heat exchange medium outlets 12B can be set at suitable positions on the heat exchange plate body opposite to the current collection outlet channel 103. This facilitates better matching of the structure of the heat exchange medium inlets 12A and the heat exchange medium outlets 12B with the structure of the heat exchange channels 101 in different heat exchange areas and the positions of the inlet and outlet ends. In addition, since the position, number, and opening area of ​​the heat exchange medium inlets 12A and the heat exchange medium outlets 12B can be flexibly adjusted, it is beneficial to increase the flexibility of the structural design of the heat exchange channels 101. The structure of the heat exchange channels 101 in multiple heat exchange areas can be set to make the flow distribution more uniform, thereby reducing the temperature difference inside the battery pack B and preventing the performance of the battery pack from being reduced due to inadequate temperature control. When the inlet 13A and outlet 13B of the manifold are connected to the pipe hole 21A on the wall 21 of the housing 20 via the connector 30, the inlet 13A can be connected to the heat exchange medium inlet 12A through the manifold inlet channel 102, and the outlet 13B can be connected to the heat exchange medium outlet 12B through the manifold outlet channel 103. The inlet 13A can be positioned as close as possible to the corresponding pipe hole 21A to the manifold inlet channel 102, and the outlet 13B can be positioned as close as possible to the corresponding pipe hole 21A to the manifold outlet channel 102. The current collection and outlet channel 103 is connected as close as possible to the corresponding pipe hole 21A. Therefore, it is beneficial to shorten the pipe length of the pipeline for introducing heat exchange medium into the heat exchange plate 10 and leading heat exchange medium out of the heat exchange plate 10 in the battery pack box and reduce the complexity of the pipe structure. The function of the pipeline for introducing heat exchange medium into the heat exchange plate and leading heat exchange medium out of the heat exchange plate in the box can be realized by the joint. This is beneficial to simplify the structure and facilitate the assembly of the heat exchange system and the box. At the same time, the joint structure is relatively compact, which helps to reduce the internal space occupied by the box.

[0082] The heat exchange medium can be a liquid, and the type of liquid can be selected according to the working environment of the battery pack, such as water or a mixture of ethylene glycol and water.

[0083] like Figures 7 to 12 As shown, in some embodiments of the battery pack, the heat exchange plate body includes a flow channel plate 11 and a flat plate 12. The flow channel plate 11 includes a first groove 111. The flat plate 12 is fixedly connected to the flow channel plate 11 and covers the first groove 111 to form a heat exchange flow channel 101. A heat exchange medium inlet 12A and a heat exchange medium outlet 12B are provided on the flat plate 12. A collector 13 is fixedly connected to the flat plate 12 and is disposed on both sides of the flat plate 12, separate from the flow channel plate 11.

[0084] The heat exchange plate body includes a flow channel plate 11 and a flat plate 12. The current collection component 13 is fixedly connected to the flat plate 12 and is located on both sides of the flat plate 12, which facilitates the formation of the heat exchange plate body. The flat plate 12 has a large contact area with the battery cells of the battery pack 40, which is conducive to heat exchange with the battery cells. The current collection component 13 can be designed with a current collection component inlet 13A, current collection component outlet 13B, current collection introduction channel 102 and current collection lead-out channel 103, so as to adapt to the structural design of the heat exchange plate body as much as possible.

[0085] like Figures 7 to 12 As shown, in some embodiments of the battery pack, the current collector 13 includes a second trench 131 and a third trench 132 isolated from the second trench 131. The current collector inlet 13A communicates with the second trench 131. The current collector outlet 13B communicates with the third trench 132. The heat exchange plate body forms a current collection inlet channel 102 and a current collection outlet channel 103 with the second trench 131 and the third trench 132, respectively.

[0086] The collector component 13 includes a second groove 131 and a third groove 132 isolated from the second groove 131. The collector component inlet 13A, collector component outlet 13B, collector introduction channel 102 and collector lead-out channel 103 can be designed through the structure of the second groove 131 and the third groove 132, so as to adapt to the structural design of the heat exchange plate body as much as possible.

[0087] like Figures 7 to 12 As shown, in some embodiments of the battery pack B, the heat exchange channel 101 includes multiple regional heat exchange channel segments 1011 within multiple heat exchange regions 10A. The heat exchange plate body is provided with multiple heat exchange medium inlets 12A, each heat exchange medium inlet 12A communicating with the inlet end of at least one regional heat exchange channel segment 1011; and / or the heat exchange plate body is provided with multiple heat exchange medium outlets 12B, each heat exchange medium outlet 12B communicating with the outlet end of at least one regional heat exchange channel segment 1011.

[0088] When the heat exchange channel 101 includes multiple regional heat exchange channel sections 1011, and the heat exchange plate body is provided with multiple heat exchange medium inlets 12A, with each heat exchange medium inlet 12A connected to the inlet end of at least one regional heat exchange channel section 1011, it is beneficial for the heat exchange medium entering the collection and introduction channel 102 to be rationally distributed to the multiple regional heat exchange channel sections 1011 through the multiple heat exchange medium inlets 12A. This facilitates a more uniform flow distribution across the multiple regional heat exchange channel sections 1011 and helps reduce the temperature difference of the battery cells 41 cooled by the multiple heat exchange zones 10A. This helps reduce the internal temperature difference of battery pack B; the heat exchange plate body is provided with multiple heat exchange medium outlets 12B, and each heat exchange medium inlet 12A is connected to the outlet end of at least one regional heat exchange flow channel section 1011, which facilitates the smooth discharge of heat exchange medium in multiple regional heat exchange flow channel sections 1011 to the collection and outlet channel 103 through multiple heat exchange medium outlets 12B, and also facilitates a more uniform flow distribution in multiple regional heat exchange flow channel sections 1011, which helps reduce the temperature difference of battery cells 41 cooled by multiple heat exchange areas 10A, thereby helping to reduce the internal temperature difference of battery pack B.

[0089] like Figures 7 to 12 As shown, in some embodiments of the battery pack B, the heat exchange channel 101 includes a heat exchange channel distribution section 1012 extending along the edge of the pipe connection end 10E, the heat exchange medium inlet 12A is connected to the heat exchange channel distribution section 1012, the inlet end of each regional heat exchange channel section 1011 is connected to the heat exchange channel distribution section 1012; and / or the heat exchange channel 101 includes a plurality of heat exchange channel confluence sections 1013, at least one heat exchange channel confluence section 1013 is connected to the outlet end of two or more regional heat exchange channel sections 1011 and a heat exchange medium outlet 12B.

[0090] By setting up a heat exchange channel distribution section 1012, the flow rate of multiple heat exchange channel sections 1011 can be reasonably distributed within the heat exchange channel 101, which helps to reduce the number of heat exchange medium inlets 12A and reduce the complexity of the collection and introduction channel 102. By setting up multiple heat exchange channel confluence sections 1013, the heat exchange medium can be promptly exported from each heat exchange channel confluence section 1013 to the collection and introduction channel 103 through multiple heat exchange channel confluence sections 1013 and multiple heat exchange medium outlets 12B, which facilitates the uniform distribution of heat exchange medium flow rate within multiple heat exchange channel confluence sections 1013.

[0091] like Figures 7 to 12As shown, in some embodiments of the battery pack B, the heat exchange plate body is provided with a heat exchange medium inlet 12A, the second groove 131 includes a first straight groove portion 1311, the current collector inlet 13A and the heat exchange medium inlet 12A are respectively located at both ends of the first straight groove portion 1311; and / or the heat exchange plate body is provided with multiple heat exchange medium outlets 12B, the third groove 132 includes a U-shaped groove section 1321 and an extension groove section 1322 connected to one free end of the U-shaped groove section 1321, wherein the current collector outlet 13B is located at the corner portion 13211 of the U-shaped groove section 1321, and / or one heat exchange medium outlet 12B is located at the corner portion 13211 of the U-shaped groove section 1321, and / or one heat exchange medium outlet 12B is located at the other free end of the U-shaped groove section 1321, and / or one heat exchange medium outlet 12B is located at the end of the extension groove section 1322 away from the U-shaped groove section 1321.

[0092] The inlet 13A of the collector component and the inlet 12A of the heat exchange medium are located at opposite ends of the first straight groove 1311 of the second groove 131. This design facilitates the uniform distribution of the heat exchange medium within the heat exchange channel, simplifies the structure of the second groove 131, shortens the length of the collector inlet channel 102, and reduces the flow resistance of the heat exchange medium within the collector inlet channel 102. When multiple heat exchange medium outlets 12B are provided on the heat exchange plate body, and the third groove 132 includes a U-shaped groove section 1321 and an extended groove section 1322, it is advantageous to adapt the structure of the heat exchange channel 101 to meet the requirement of converging the heat exchange medium from each heat exchange medium outlet 12B into the collector outlet channel 103, thereby reducing the size and space occupied by the collector component 13. The outlet 13B of the collector component is located at the corner 13211 of the U-shaped groove section 1321, which facilitates the timely flow of heat exchange medium from the heat exchange medium outlets 12B at various points of the third groove 132 into the collector outlet channel 103, and out of the collector component outlet 13B. One heat exchange medium outlet 12B is located at the corner 13211 of the U-shaped groove section 1321, which facilitates the timely flow of heat exchange medium from the heat exchange medium from this outlet 12B into the collector outlet channel 103, and out of the collector component outlet 13B. The heat exchange medium outlet 12B is located at the other free end of the U-shaped groove section 1321, and / or one heat exchange medium outlet 12B is located at the end of the extension groove section 1322 away from the U-shaped groove section 1321. On the basis of facilitating the timely flow of the heat exchange medium from the two heat exchange medium outlets 12B into the collection and outlet channel 103 from the collection component outlet 13B, the length of the third groove 132 and the collection and outlet channel 103 is shortened, thereby reducing the flow resistance of the heat exchange medium in the collection and outlet channel 103.

[0093] like Figures 7 to 12As shown, in some embodiments of the battery pack B, the first straight groove 1311 and the second straight groove 13212 of the U-shaped groove segment 1321 are both parallel to the edge of the pipe connection end 10E and equidistant from the edge of the pipe connection end 10E. The third straight groove 13213 of the U-shaped groove segment 1321 is located on the side of the second straight groove 13212 away from the edge of the pipe connection end 10E. The extended groove segment 1322 includes a slanted groove 13221 and a fourth straight groove 13222. The fourth straight groove 13222 is parallel to the first straight groove 1311 and is further away from the edge of the pipe connection end 10E than the first straight groove 1311. The slanted groove 13221 connects the second straight groove 13212 and the fourth straight groove 13222.

[0094] The structural arrangement and positional relationship of the second groove 131 and the third groove 132 facilitate full utilization of the surface area of ​​the heat exchange plate 10. This also helps to shorten the length of the current collection inlet channel 102 and the current collection outlet channel 103 while still fulfilling the function of the current collection component 13, thereby reducing the flow resistance of the heat exchange medium within these channels. Furthermore, it helps to shorten the pipe length within the housing 20 of the battery pack B for introducing and exiting the heat exchange medium from the heat exchange plate 10, reducing the complexity of the pipe structure and minimizing the internal space occupied by these pipes within the housing 20.

[0095] like Figures 7 to 12 As shown, in some embodiments of the battery pack B, the distance between the inlet 13A of the current collector and the edge of the pipe connection end 10E of the heat exchange plate 10 is equal to the distance between the outlet 13B of the current collector and the edge of the pipe connection end 10E of the heat exchange plate 10.

[0096] The distances between the inlet 13A and outlet 13B of the manifold and the edge of the pipe connection end 10E of the heat exchange plate 10 are equal, which facilitates the arrangement of pipes for introducing heat exchange medium into and out of the heat exchange plate 10 within the housing 20. For example, it is beneficial to use pipes with a uniform structure to reduce the design and manufacturing costs of the pipes, and it also facilitates the assembly of the heat exchange system with the housing 20.

[0097] like Figures 2 to 6 As shown, in some embodiments of the battery pack B, the current collector inlet 13A and the current collector outlet 13B are located at approximately the same position as the corresponding pipe hole 21A along the extension direction of the box wall 21.

[0098] By aligning the two pipe holes 21A with the positions of the inlet 13A and outlet 13B of the collector component in the direction of extension of the box wall 21, the size of the joint and the internal space occupied by the box 20 can be reduced.

[0099] For example, the centerline of one of the two pipe holes 21A can be coplanar with the centerline of the inlet 13A of the collector component, and the centerline of the other pipe hole 21A can be coplanar with the centerline of the outlet 13B of the collector component. Further, the centerline of one of the two pipe holes 21A can be perpendicular to the centerline of the inlet 13A of the collector component, and the centerline of the other pipe hole 21A can be perpendicular to the centerline of the outlet 13B of the collector component. The centerlines of the two pipe holes 21A being perpendicular to the centerlines of the inlet 13A and the outlet 13B of the collector component respectively conforms to the arrangement when the heat exchange plate 10 and the box wall 21 are perpendicular to each other, facilitating the machining of the inlet 13A and the outlet 13B of the collector component.

[0100] like Figures 3 to 11 As shown, in some embodiments of the battery pack B, the first ends of the two connectors 30 are fixedly connected to the current collector 13 and respectively connected to the current collector inlet 13A and the current collector outlet 13B. The second ends of the two connectors 30 pass through the corresponding pipe holes 21A and are fixedly connected to the box wall 21.

[0101] The first ends of the two connectors 30 are fixedly connected to the collector 13 and respectively connected to the inlet 13A and outlet 13B of the collector 13. The second ends of the two connectors 30 pass through the corresponding pipe holes 21A and are fixedly connected to the box wall 21. The connectors 30 are firmly connected to the collector 13 and the box wall 21, which makes the structure of the connectors 30 more compact and reduces the internal space of the box 20 occupied by the connectors 30.

[0102] like Figures 3 to 11 As shown, in some embodiments of the battery pack B, the connector 30 is welded to the wall of the corresponding bore 21A.

[0103] The connector 30 is welded to the wall of the corresponding pipe hole 21A, eliminating the need for flanges used in related technologies to connect pipes and housings, which further helps to reduce the internal space occupied by pipes in housing 20.

[0104] like Figures 7 to 11 , Figures 13 to 15 As shown, in some embodiments of the battery pack B, the connector 30 includes a first flow channel portion 31, a second flow channel portion 32, and a tube head 33. A first end of the first flow channel portion 31 forms a first end of the connector 30. The second flow channel portion 32 is disposed at an angle to the first flow channel portion 31. A first end of the second flow channel portion 32 is connected to a second end of the first flow channel portion 31. A first end of the tube head 33 is connected to the second flow channel portion 32. A second end of the tube head 33 forms a second end of the connector 30.

[0105] The connector 30 includes a first flow channel 31, a second flow channel 32, and a pipe head 33. The included angle between the first flow channel 31 and the second flow channel 32 allows the first end of the first flow channel 31 to be aligned with the inlet 13A or outlet 13B of the collector component, and the second end of the second flow channel 32 to be aligned with the corresponding pipe hole 21A. The pipe head 33 can be connected to the pipeline outside the housing 20, thereby realizing the function of introducing heat exchange medium into the heat exchange plate 10 or drawing heat exchange medium out of the heat exchange plate 10.

[0106] like Figures 7 to 11 , Figures 13 to 15 As shown, in some embodiments of the battery pack B, the connector 30 further includes a temperature sensing unit 34. The temperature sensing unit 34 includes a sensor mounting portion 34A. The battery pack B includes a temperature sensor. The temperature sensor is configured to detect the temperature of the heat exchange medium within the connector 30 and is mounted on the connector 30 via the sensor mounting portion 34A.

[0107] The temperature measuring unit 34 can be set up to integrate the temperature sensor onto the connector 30 so as to detect the temperature of the heat exchange medium inside the connector 30.

[0108] The temperature measuring unit 34 can be disposed at the connection between the first flow channel 31 and the second flow channel 32, and this arrangement also helps to enhance the connection strength between the first flow channel 31 and the second flow channel 32.

[0109] like Figures 7 to 11 , Figures 13 to 15 As shown, in some embodiments of the battery pack B, the connector 30 further includes an extension 35. The extension 35 is disposed at the second end of the second flow channel portion 32 and extends from the second flow channel portion 32 in a direction away from the second flow channel portion 32 along the extending direction of the first flow channel portion 31, and is disposed side by side with the first flow channel portion 31. The second flow channel portion 32 and the extension 35 have welding surfaces 301 that mate with the shape of the hole wall of the corresponding tube hole 21A.

[0110] The connector 30 also includes an extension 35. The second flow channel 32 and the extension 35 have a welding surface 301 that matches the shape of the hole wall of the corresponding pipe hole 21A, which facilitates accurate positioning and firm connection between the connector 30 and the pipe hole 21A.

[0111] like Figures 7 to 11 , Figures 13 to 15 As shown, in some embodiments of the battery pack B, the connector 30 further includes a positioning portion 37. The positioning portion 37 is configured to define the relative position of the connector 30 and the heat exchange plate 10.

[0112] By setting the positioning part 37, it is easy to accurately position the connector 30 and the heat exchange plate 10, and facilitate quick and accurate assembly between the two and between the connector 30 and the box wall 21.

[0113] like Figures 7 to 11 ,Figures 13 to 15 As shown, in some embodiments of the battery pack B, the positioning part 37 includes: a positioning ring 371 disposed at the first end of the first flow channel part 31 and configured to insert into the current collector inlet 13A or the current collector outlet 13B; and / or a first positioning surface 372 configured to fit against the edge of the pipeline connection end 10E; and / or a second positioning surface 373 configured to fit against the edge of the current collector 13 near the connector 30; and / or a positioning protrusion 374 configured to engage with a positioning recess shape disposed on the edge of the pipeline connection end 10E.

[0114] The positioning part 37 includes a positioning ring 371, which facilitates the accurate positioning of the connector 30 and the inlet 13A or outlet 13B of the collector component 13. The positioning part 37 includes a first positioning surface 372, a second positioning surface 373 and / or a positioning protrusion 374, which are all conducive to the accurate positioning of the connector 30 and the heat exchange plate 10 as a whole or in part, thereby facilitating the accurate positioning of the connector 30 and the heat exchange plate 10 and making it easy to quickly and accurately assemble the two together and the connector 30 and the box wall 21.

[0115] like Figure 1 , Figures 1 to 15 As shown, in some embodiments of the battery pack B, the battery pack B further includes a connecting portion 36. The connecting portion 36 connects the first end of the first flow channel portion 31 to the end of the extension portion 35 away from the second flow channel portion 32. A first positioning surface 372, a second positioning surface 373, and a positioning protrusion 374 are disposed on the side of the connecting portion 36 away from the second flow channel portion 32.

[0116] The connecting portion 36 connects the first flow channel portion 31 and the extension portion 35, which helps to enhance the overall strength of the connector 30 without significantly increasing the internal space occupied by the housing 20, and also helps to increase the connection stability of the connector 30 with the housing 20 and with the heat exchange plate 10. The first positioning surface 372, the second positioning surface 373 and / or the positioning protrusion 374 are provided on the side of the connecting portion 36 away from the second flow channel portion 32, so that the connecting portion 36 integrates at least part of the positioning function of the positioning portion 37.

[0117] like Figure 1 As shown, this application provides an electrical device, which includes a battery pack B according to an embodiment of this application. The battery pack B is used to provide power to the electrical device D.

[0118] The electrical device D provided in this application has the same advantages as the battery pack B provided in this application.

[0119] The following combination Figure 1 The present application will provide a more detailed description of a battery pack B and an electrical device D having the battery pack B, according to some embodiments of the present application.

[0120] Please refer to Figure 2. Figure 2 This is a schematic diagram of the structure of an electrical device—vehicle D—provided in some embodiments of this application. Vehicle D 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 vehicles, etc. Figure 3 The vehicle D has a battery pack B installed inside it. The battery pack B can be located at the bottom, front, or rear of the vehicle D. The battery pack B can be used to power the vehicle D, for example, it can serve as the operating power source for the vehicle D.

[0121] In some embodiments of this application, the battery pack B can not only serve as the operating power source for the vehicle D, but also as the driving power source for the vehicle D, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle D.

[0122] like Figure 11 As shown, battery pack B includes a battery box C and multiple battery packs 40 disposed within the battery box C. Battery box C includes a box body 20 and a cover 60 that snaps onto the box body 20. Each battery pack 40 includes multiple individual battery cells 41 arranged side-by-side. The number and position of the battery packs 40 can be configured according to the requirements of battery pack B. For example, the number of battery packs 40 can be one, two, three, six, etc.

[0123] Figure 6 This diagram illustrates a structural schematic of the combined structure of the housing 20 and heat exchange system of the battery pack B according to some embodiments of this application. The heat exchange system mainly includes a heat exchange plate 10 and two connectors 30. The heat exchange plate 10 is located at the bottom of the housing 20. Multiple battery packs 40 are disposed on the heat exchange plate 10. The heat exchange system and its heat exchange plate 10 are used to regulate the temperature of each battery cell 41 in the multiple battery packs 40.

[0124] The heat exchange plate 10 includes a flow channel plate 11, a flat plate 12, and a flow collector 13. The flow channel plate 11 and the flat plate 12 constitute the main body of the heat exchange plate.

[0125] The flow channel plate 11 includes a first groove 111. A flat plate 12 is fixedly connected to the flow channel plate 11 and covers the first groove 111 to form a heat exchange flow channel 101. The flat plate 12 is provided with a heat exchange medium inlet 12A and three heat exchange medium outlets 12B that communicate with the heat exchange flow channel 101.

[0126] The manifold 13 is located at the pipe connection end 10E of the heat exchange plate 10. The manifold 13 includes a second groove 131, a manifold inlet 13A communicating with the second groove 131, a third groove 132, and a manifold outlet 13B communicating with the third groove 132. The manifold 13 is fixedly connected to the flat plate 12 and is located on opposite sides of the flow channel plate 11. The flat plate 12 covers the second groove 131 to form a manifold inlet channel 102 connecting the heat exchange medium inlet 12A and the manifold inlet 13A. The flat plate 12 covers the third groove 132 to form a manifold outlet channel 103 connecting the heat exchange medium outlet 12B and the manifold outlet 13B. The manifold 13 is, for example, a manifold plate formed by stamping sheet metal.

[0127] The heat exchange channel 101 comprises six zone heat exchange channel sections 1011 within six heat exchange zones 10A. The inlet and outlet ends of each zone heat exchange channel section 1011 are located near the pipe connection end 10E. The entire zone heat exchange channel section 1011 forms a U-shaped channel. Some sections of the U-shaped channel can be divided into multiple branches; for example, the section near the inlet end may be divided into two parallel branches, and the section near the outlet end may be divided into three parallel branches.

[0128] The heat exchange channel 101 also includes a heat exchange channel distribution section 1012 extending along the edge of the pipe connection end 10E. The heat exchange medium inlet 12A is connected to the heat exchange channel distribution section 1012. The inlet end of each zone heat exchange channel section 1011 is connected to the heat exchange channel distribution section 1012.

[0129] The heat exchange channel 101 includes three heat exchange channel confluence sections 1013. Each heat exchange channel confluence section 1013 is connected to the outlet end of two regional heat exchange channel sections 1011 and a heat exchange medium outlet 12B. That is, each heat exchange medium inlet 12A of the three heat exchange medium outlets 12B is connected to the outlet end of the two regional heat exchange channel sections 1011 through a heat exchange channel confluence section 1013.

[0130] The second groove 131 includes a first straight groove portion 1311. The inlet 13A of the collector component and the inlet 12A of the heat exchange medium are located at opposite ends of the first straight groove portion 1311.

[0131] The third groove 132 includes a U-shaped groove segment 1321 and an extension groove segment 1322 connected to one free end of the U-shaped groove segment 1321. Both the first straight groove portion 1311 and the second straight groove portion 13212 of the U-shaped groove segment 1321 are parallel to and equidistant from the edge of the pipe connection end 10E. The third straight groove portion 13213 of the U-shaped groove segment 1321 is located on the side of the second straight groove portion 13212 away from the edge of the pipe connection end 10E. The extension groove segment 1322 includes a slanted groove portion 13221 and a fourth straight groove portion 13222. The fourth straight groove portion 13222 is parallel to the first straight groove portion 1311 and is further away from the edge of the pipe connection end 10E than the first straight groove portion 1311. The slanted groove portion 13221 connects the second straight groove portion 13212 and the fourth straight groove portion 13222.

[0132] ​ The locations of the heat exchange medium inlet 12A, three heat exchange medium outlets 12B, and the manifold inlet 13A and outlet 13B are marked with dashed lines. The manifold outlet 13B is located at the corner 13211 of the U-shaped trough section 1321. One heat exchange medium outlet 12B is located at the corner 13211 of the U-shaped trough section 1321. Another heat exchange medium outlet 12B is located at the other free end of the U-shaped trough section 1321. A third heat exchange medium outlet 12B is located at the end of the extension section 1322 furthest from the U-shaped trough section 1321. The distance between the manifold inlet 13A and the edge of the pipe connection end 10E of the heat exchange plate 10 is equal to the distance between the manifold outlet 13B and the edge of the pipe connection end 10E of the heat exchange plate 10.

[0133] Two pipe holes 21A are provided on the wall 21 of the housing 20 near the pipe connection end 10E. One of the pipe holes 21A is located at the same position as the inlet 13A of the collector component along the extension direction of the housing wall 21. The other pipe hole 21A is located at the same position as the outlet 13B of the collector component along the extension direction of the housing wall 21. The orientation of the two pipe holes 21A is perpendicular to the orientation of the inlet 13A and the outlet 13B of the collector component, respectively.

[0134] The two joints 30 have the same structure and are located between the box wall 21 and the expansion beam 22. The identical structure of the two joints 30 helps to reduce the design and manufacturing costs of the pipe fittings and also facilitates the assembly of the heat exchange system with the box 20.

[0135] One of the two connectors 30 has its first end fixedly connected to the collector 13 and communicating with the collector inlet 13A. Its second end passes through a pipe hole 21A located at the same position as the collector inlet 13A along the extension direction of the box wall 21 and is welded to the wall of the pipe hole 21A. The other connector 30 has its first end fixedly connected to the collector 13 and communicating with the collector outlet 13B. Its second end passes through a pipe hole 21A located at the same position as the collector outlet 13B along the extension direction of the box wall 21 and is welded to the wall of the pipe hole 21A.

[0136] The connector 30 includes a first flow channel 31, a second flow channel 32, a tube head 33, a temperature measuring part 34, an extension part 35, a connecting part 36, and a positioning part 37.

[0137] The first end of the first flow channel 31 forms the first end of the connector 30.

[0138] The second flow channel 32 is perpendicular to the first flow channel 31. The first end of the second flow channel 32 is connected to the second end of the first flow channel 31.

[0139] The first end of the tube head 33 is connected to the second flow channel 32. The second end of the tube head 33 forms the second end of the connector 30.

[0140] A temperature measuring unit 34 is disposed at the connection between the first flow channel section 31 and the second flow channel section 32. The temperature measuring unit 34 includes a sensor mounting section 34A. The battery pack B includes a temperature sensor. The temperature sensor is configured to detect the temperature of the heat exchange medium within the connector 30 and is mounted on the connector 30 via the sensor mounting section 34A. The temperature sensor is, for example, an NTC temperature sensor, and the sensor mounting section 34A is, for example, a threaded hole for mounting the NTC temperature sensor. The temperature of the heat exchange medium flowing within the connector 30 can be monitored using the NTC temperature sensor. Placing the temperature sensor at a corner of the connector 30 allows it to measure a temperature closer to the true temperature of the heat exchange medium.

[0141] An extension 35 is disposed at the second end of the second flow channel portion 32 and extends from the second flow channel portion 32 in a direction away from the second flow channel portion 32 along the extending direction of the first flow channel portion 31, and is disposed side by side with the first flow channel portion 31. The second flow channel portion 32 and the extension 35 have welding surfaces 301 that mate with the shape of the corresponding borehole 21A. The welding surface 301 of the joint 30 is welded to the borehole wall of the borehole 21A, such as... ​ As shown, weld H is formed after welding. Welding the sides and top of joint 30 to the box wall 21 helps to ensure the airtightness of battery pack B.

[0142] The connecting portion 36 is connected to the first end of the first flow channel portion 31 and the end of the extension portion 35 that is away from the second flow channel portion 32.

[0143] The positioning part 37 is configured to limit the relative position of the connector 30 and the heat exchange plate 10 to ensure the accurate positioning of the connector 30. The positioning part 37 includes a positioning ring 371, a first positioning surface 372, a second positioning surface 373, and a positioning protrusion 374. The positioning ring 371 is disposed at the first end of the first flow channel part 31 and is configured to insert into the inlet 13A or outlet 13B of the collector component. The first positioning surface 372 is disposed on the connecting part 36 and is configured to abut against the edge of the pipe connection end 10E. The second positioning surface 373 is disposed on the connecting part 36 and is configured to abut against the edge of the collector component 13 on the side near the connector 30. The positioning protrusion 374 is disposed on the connecting part 36 and is configured to engage with a positioning recess shape disposed on the edge of the pipe connection end 10E. The positioning protrusion 374 is a U-shaped protrusion to facilitate entry into the positioning recess.

[0144] The battery pack B in this embodiment can achieve low-cost bridging of different heat exchange channel sections 1011 of the heat exchange channel 101 by setting the flow collector 13. Furthermore, the expected flow distribution can be quickly achieved by changing the shape and arrangement of the second groove 131 and the third groove 132 of the flow collector 13, the opening area and arrangement of the heat exchange medium inlet 12A and the heat exchange medium outlet 12B, and the arrangement of the flow collector inlet 13A and the flow collector outlet 13B, thereby reducing the design time required for the heat exchange plate 10.

[0145] Simulation experiments, under the same simulated operating conditions, showed that the battery pack B of this application embodiment, equipped with a heat exchange plate containing current collectors, can reduce the internal temperature difference of the battery pack from approximately 10°C to approximately 1°C compared to a battery pack in related technologies that has a heat exchange plate without current collectors. This reduction in internal temperature difference in battery pack B can decrease the impact of excessive temperature variations on battery pack lifespan.

[0146] Because the heat exchange system occupies less internal space in the housing 20, the energy density of battery pack B can be effectively increased and the cost reduced.

[0147] 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 preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A battery pack (B), characterized in that, include: Battery pack (40); The heat exchange plate (10) includes a heat exchange plate body and a collector component (13). The heat exchange plate body includes a heat exchange channel (101), a heat exchange medium inlet (12A) and a heat exchange medium outlet (12B) communicating with the heat exchange channel (101). The collector component (13) has a collector component inlet (13A) and a collector component outlet (13B), and is disposed at the pipe connection end (10E) of the heat exchange plate body, covering the heat exchange medium inlet (12A) and the heat exchange medium outlet (12B). It includes a second groove (131) communicating with the collector component inlet (13A) and a collector component that is isolated from the second groove (131) and communicating with the collector component. The third groove (132) of the component outlet (13B) includes the second groove (131) which includes a first straight groove (1311), and the third groove (132) which includes a U-shaped groove section (1321) and an extension groove section (1322) connected to a free end of the U-shaped groove section (1321). The heat exchange plate body, the second groove (131) and the third groove (132) respectively form a flow collection inlet channel (102) connecting the heat exchange medium inlet (12A) and the flow collection component inlet (13A) and a flow collection outlet channel (103) connecting the heat exchange medium outlet (12B) and the flow collection component outlet (13B). The housing (20), the heat exchange plate (10) and the battery pack (40) are located inside the housing (20), and two pipe holes (21A) are provided on the housing wall (21) near the pipe connection end (10E) of the housing (20), corresponding to the inlet (13A) and outlet (13B) of the current collector respectively; and Two connectors (30) are provided, and the inlet (13A) and outlet (13B) of the current collection component are respectively connected to the two corresponding pipe holes (21A) through the two connectors (30).

2. The battery pack (B) according to claim 1, characterized in that, The heat exchange plate body includes: The flow channel plate (11) includes a first groove (111); and A flat plate (12) is fixedly connected to the flow channel plate (11) and covers the first groove (111) to form a heat exchange flow channel (101). The heat exchange medium inlet (12A) and the heat exchange medium outlet (12B) are provided on the flat plate (12). The flow collection component (13) is fixedly connected to the flat plate (12) and is located on both sides of the flat plate (12) respectively from the flow channel plate (11).

3. The battery pack (B) according to claim 1, characterized in that, The heat exchange channel (101) includes multiple regional heat exchange channel segments (1011) within multiple heat exchange zones (10A); wherein, The heat exchange plate body is provided with a plurality of heat exchange medium inlets (12A), each heat exchange medium inlet (12A) being connected to the inlet end of at least one of the zone heat exchange flow channel sections (1011); and / or The heat exchange plate body is provided with a plurality of heat exchange medium outlets (12B), and each heat exchange medium outlet (12B) is connected to the outlet end of at least one of the regional heat exchange flow channel sections (1011).

4. The battery pack (B) according to claim 3, characterized in that, The heat exchange channel (101) includes a heat exchange channel distribution section (1012) extending along the edge of the pipe connection end (10E), the heat exchange medium inlet (12A) being connected to the heat exchange channel distribution section (1012), and the inlet end of each of the zone heat exchange channel sections (1011) being connected to the heat exchange channel distribution section (1012); and / or The heat exchange channel (101) includes a plurality of heat exchange channel confluence sections (1013), at least one of the heat exchange channel confluence sections (1013) is connected to the outlet end of two or more of the regional heat exchange channel sections (1011) and a heat exchange medium outlet (12B).

5. The battery pack (B) according to claim 1, characterized in that, The inlet of the collector component (13A) and one of the heat exchange medium inlets (12A) are respectively located at both ends of the first straight groove (1311); and / or The outlet (13B) of the current collection component is located at the corner (13211) of the U-shaped groove section (1321); and / or One of the heat exchange medium outlets (12B) is located at the corner (13211) of the U-shaped trough section (1321); and / or One of the heat exchange medium outlets (12B) is located at the other free end of the U-shaped trough section (1321); and / or One of the heat exchange medium outlets (12B) is located at one end of the extension section (1322) away from the U-shaped section (1321).

6. The battery pack (B) according to claim 1, characterized in that, The first straight groove (1311) and the second straight groove (13212) of the U-shaped groove (1321) are both parallel to the edge of the pipe connection end (10E) and are equidistant from the edge of the pipe connection end (10E). The third straight groove (13213) of the U-shaped groove (1321) is located on the side of the second straight groove (13212) away from the edge of the pipe connection end (10E). The extended groove section (1322) includes an inclined groove (13221) and a fourth straight groove (13222). The fourth straight groove (13222) is parallel to the first straight groove (1311) and is further away from the edge of the pipeline connection end (10E) than the first straight groove (1311). The inclined groove (13221) connects the second straight groove (13212) and the fourth straight groove (13222).

7. The battery pack (B) according to claim 1, characterized in that, The distance between the inlet (13A) of the manifold and the edge of the pipe connection end (10E) of the heat exchange plate (10) is equal to the distance between the outlet (13B) of the manifold and the edge of the pipe connection end (10E) of the heat exchange plate (10).

8. The battery pack (B) according to any one of claims 1 to 7, characterized in that, The inlet (13A) and outlet (13B) of the current collector are located at approximately the same position as the corresponding pipe hole (21A) along the extension direction of the box wall (21).

9. The battery pack (B) according to claim 1, characterized in that, The first ends of the two connectors (30) are fixedly connected to the collector (13) and respectively to the inlet (13A) and outlet (13B) of the collector. The second ends of the two connectors (30) pass through the corresponding pipe hole (21A) and are fixedly connected to the box wall (21).

10. The battery pack (B) according to claim 9, characterized in that, The joint (30) is welded to the wall of the corresponding pipe hole (21A).

11. The battery pack (B) according to claim 9, characterized in that, The connector (30) includes: The first flow channel (31) has its first end forming the first end of the connector (30); The second flow channel (32) is arranged at an angle to the first flow channel (31), and the first end of the second flow channel (32) is connected to the second end of the first flow channel (31); and The first end of the pipe head (33) is connected to the second flow channel (32), and the second end of the pipe head (33) forms the second end of the connector (30).

12. The battery pack (B) according to claim 11, characterized in that, The connector (30) further includes a temperature measuring part (34), which is disposed at the connection between the first flow channel part (31) and the second flow channel part (32). The temperature measuring part (34) includes a sensor mounting part (34A). The battery pack (B) includes a temperature sensor configured to detect the temperature of the heat exchange medium within the connector (30), the temperature sensor being mounted on the connector (30) via the sensor mounting part (34A).

13. The battery pack (B) according to claim 11, characterized in that, The connector (30) further includes an extension (35) which is disposed at the second end of the second flow channel (32) and extends away from the second flow channel (32) along the extension direction of the first flow channel (31) and is disposed side by side with the first flow channel (31). The second flow channel (32) and the extension (35) have welding surfaces (301) that match the shape of the hole wall of the corresponding tube hole (21A).

14. The battery pack (B) according to claim 11, characterized in that, The connector (30) further includes a positioning part (37) configured to define the relative position of the connector (30) and the heat exchange plate (10).

15. The battery pack (B) according to claim 14, characterized in that, The positioning part (37) includes: A positioning ring (371), disposed at the first end of the first flow channel portion (31), is configured to engage with the inlet (13A) or outlet (13B) of the flow collector component; and / or The first positioning surface (372) is configured to mate with the edge of the pipe connection end (10E); and / or The second positioning surface (373) is configured to mate with the edge of the collector component (13) near the connector (30); and / or The positioning protrusion (374) is configured to engage with the shape of the positioning recess provided on the edge of the pipe connection end (10E).

16. The battery pack (B) according to claim 15, characterized in that, It also includes an extension (35) and a connecting portion (36). The extension (35) is disposed at the second end of the second flow channel (32) and extends from the second flow channel (32) in the direction away from the second flow channel (32) along the extension direction of the first flow channel (31) and is disposed side by side with the first flow channel (31). The connecting portion (36) is connected to the first end of the first flow channel (31) and the end of the extension (35) away from the second flow channel (32). The first positioning surface (372), the second positioning surface (373) and the positioning protrusion (374) are disposed on the side of the connecting portion (36) away from the second flow channel (32).

17. An electrical appliance (D), characterized in that, The battery pack (B) includes any one of claims 1 to 16, the battery pack (B) being used to provide power to the electrical equipment (D).

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