Battery pack and electric equipment

Abstract

The invention provides a battery pack and electric equipment. The battery pack includes: a battery pack; the heat exchange plate comprises a heat exchange plate body and a flow collecting component, the heat exchange plate body comprises a heat exchange flow channel, a heat exchange medium inlet and a heat exchange medium outlet, the heat exchange medium inlet and the heat exchange medium outlet are communicated with the heat exchange flow channel, the flow collecting component is provided with a flow collecting component inlet and a flow collecting component outlet, and the pipeline connecting end is arranged on the heat exchange plate body and covers the heat exchange medium inlet and the heat exchange medium outlet. The heat exchange plate body and the heat exchange plate body form a flow collection leading-in channel communicating with the heat exchange medium inlet and the flow collection component inlet and a flow collection leading-out channel communicating with the heat exchange medium outlet and the flow collection component outlet. The heat exchange plate and the battery pack are located in the box body, and the box wall, close to the pipeline connecting end, of the box body is provided with two pipe holes corresponding to the flow collecting component inlet and the flow collecting component outlet respectively; the flow collecting component inlet and the flow collecting component outlet are connected with the two corresponding pipe holes through the two connectors respectively. The electric equipment comprises the battery pack.

Description

Technical Field

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

[0002] The ambient temperature of the battery pack during operation and the temperature of the battery pack itself during operation will affect the performance of the battery pack, and the battery pack needs to be thermally managed through a heat exchange system. The heat exchange system usually includes a heat exchange plate and an input pipe for inputting a heat exchange medium to the heat exchange plate and an output pipe for leading the heat exchange medium out of the heat exchange plate. In the related art, there is often a problem of excessive temperature difference inside the battery pack, and excessive temperature difference inside the battery pack will have an adverse effect on the performance and life of the battery pack. In order to allow the pipes for inputting heat exchange medium to the heat exchange plate and the pipes for outputting heat exchange medium from the heat exchange plate to enter and exit the battery pack, two pipe holes are set on the box of the battery pack. However, the pipes connecting the heat exchange plate and the two pipe holes in the box require more layout space.

[0003] The above statements are only used to provide background technical information related to the present application 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, aiming to solve the problem that the temperature difference inside the battery pack is too large and the pipes connecting the heat exchange plate and the two pipe holes in the box need to occupy a large layout space.

[0005] 14. The heat exchanger as claimed in claim 13, wherein the heat exchanger is arranged on a wall of the heat exchanger body and has a first end connected to the first end of the heat exchanger body and a second end connected to the first end of the heat exchanger body. The heat exchanger is arranged on a wall of the heat exchanger body and has a first end connected to the first end of the heat exchanger body. The heat exchanger is arranged on a wall of the heat exchanger body and has a first end connected to the first end of the heat exchanger body

[0006] After adding the collecting components, the design flexibility of the heat exchange medium inlet and the heat exchange medium outlet can be increased. For example, a suitable number of heat exchange medium inlets with suitable opening areas are set at a suitable position on the heat exchange plate body opposite to the collecting inlet channel, and a suitable number of heat exchange medium outlets with suitable opening areas are set at a suitable position on the heat exchange plate body opposite to the collecting outlet channel. This is conducive to better matching the heat exchange medium inlet and the heat exchange medium outlet with the structure of the heat exchange flow 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 the heat exchange medium outlet can be flexibly adjusted, it is conducive to increasing the flexibility of the structural design of the heat exchange flow channels. The structure of the heat exchange flow 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 collecting component are respectively connected to the tube holes on the box wall of the box body through the joints, since the inlet of the collecting component can be connected to the inlet of the heat exchange medium through the collecting inlet channel, and the outlet of the collecting component can be connected to the outlet of the heat exchange medium through the collecting outlet channel, the inlet of the collecting component can be set at a position as close to the corresponding tube hole as possible for connection with the collecting inlet channel, and the outlet of the collecting component can be set at a position as close to the corresponding tube hole as possible for connection with the collecting outlet channel. Therefore, it is beneficial to shorten the length of the pipe fittings in the box body of the battery pack for the pipelines for introducing the heat exchange medium to the heat exchange plate and leading the heat exchange medium out of the heat exchange plate and reduce the complexity of the pipe fitting structure. The function of the pipe fittings in the box body for introducing the heat exchange medium to the heat exchange plate and leading the heat exchange medium out of the heat exchange plate can be realized through the joint, which is beneficial to simplify the structure and facilitate the assembly of the heat exchange system and the box body. At the same time, the structure of the joint is relatively compact, which is beneficial to reduce the occupied internal space of the box.

[0007] In some embodiments of the battery pack, the heat exchange plate body includes: a flow channel plate, including a first groove; and a flat plate, fixedly connected to the flow channel plate and covering the first groove to form a heat exchange flow channel, the heat exchange medium inlet and the heat exchange medium outlet are arranged on the flat plate, and the collecting component is fixedly connected to the flat plate and is arranged on both sides of the flat plate with 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 arranged on both sides of the flat plate with the flow channel plate, which is convenient for forming the heat exchange plate body. The flat plate has a large contact area with the battery cells of the battery pack, which is beneficial for heat exchange with the battery cells. It is convenient to design the structure of the current collecting component to design the current collecting component inlet, the current collecting component outlet, the current collecting introduction channel and the current collecting outlet channel, so as to adapt to the structural design of the heat exchange plate body as much as possible.

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

[0010] The flow collecting component includes a second groove and a third groove isolated from the second groove. The structure of the second groove and the third groove can be used to design the flow collecting component inlet, the flow collecting component outlet, the flow collecting inlet channel and the flow collecting outlet channel, thereby being able 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 sections within multiple heat exchange areas; wherein, the heat exchange plate body is provided with multiple heat exchange medium inlets, each of the heat exchange medium inlets is connected to the inlet end of at least one of the regional heat exchange channel sections; and / or the heat exchange plate body is provided with multiple heat exchange medium outlets, each of the heat exchange medium inlets is connected to the outlet end of at least one of the regional heat exchange channel sections.

[0012] When the heat exchange channel includes multiple regional heat exchange channel sections, the heat exchange plate body is provided 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, the heat exchange medium entering the collecting inlet channel is reasonably distributed to the multiple regional heat exchange channel sections through the multiple heat exchange medium inlets, which is conducive to more uniform flow distribution of the multiple regional heat exchange channel sections, and is conducive to reducing the temperature difference between the battery cells cooled by the multiple heat exchange regions, thereby helping to reduce the temperature difference inside the battery pack; the heat exchange plate body is provided with multiple heat exchange medium outlets. Each heat exchange medium inlet is connected to the outlet end of at least one regional heat exchange channel section, which is conducive to smoothly exporting the heat exchange medium in the multiple regional heat exchange channel sections to the collecting inlet channel through the multiple heat exchange medium outlets, and is also conducive to more uniform flow distribution of the multiple regional heat exchange channel sections, which is conducive to reducing the temperature difference between the battery cells cooled by the multiple heat exchange regions, thereby helping to reduce the temperature difference inside 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 pipeline connection end, the heat exchange medium inlet is connected to the heat exchange channel distribution section, and the inlet end of each regional heat exchange channel section is connected to 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 is connected to the outlet ends of two or more regional heat exchange channel sections and one of the heat exchange medium outlets.

[0014] By providing a heat exchange channel distribution section, the flow rate of multiple heat exchange channel sections can be rationally distributed within the heat exchange channel through the heat exchange channel distribution section, which helps reduce the number of heat exchange medium inlets and the complexity of the flow collection channel. By providing multiple heat exchange channel converging sections, the heat exchange medium can be promptly discharged from each heat exchange channel converging section to the flow collection channel through multiple heat exchange channel converging sections and multiple heat exchange medium outlets, which helps to evenly distribute the heat exchange medium flow rate within multiple heat exchange channel converging sections.

[0015] In some embodiments of the battery pack, the heat exchange plate body is provided with a heat exchange medium inlet, the second groove includes a first straight groove portion, the current collecting component 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 a plurality of heat exchange medium outlets, the third groove includes a U-shaped groove section and an extended groove section connected to a free end of the U-shaped groove section, wherein the current collecting component outlet is located at the corner portion of the U-shaped groove section, and / or one of the heat exchange medium outlets is located at the corner portion of the U-shaped groove section, and / or one of the heat exchange medium outlets is located at the other free end of the U-shaped groove section, and / or one of the heat exchange medium outlets is located at the end of the extended groove section away from the U-shaped groove section.

[0016] The flow collection component inlet and the heat exchange medium inlet are located at either end of the first straight groove portion of the second groove, respectively. This facilitates evenly distributing the heat exchange medium within the heat exchange channel, simplifies the second groove structure, shortens the flow collection channel, and reduces the flow resistance of the heat exchange medium within the channel. Multiple heat exchange medium outlets are provided on the heat exchange plate body, and when the third groove includes a U-shaped groove segment and an extended groove segment, this facilitates adapting to the heat exchange channel structure, allowing the heat exchange medium from each heat exchange medium outlet to converge into the flow collection channel, thereby reducing the size and space occupied by the flow collection component. The outlet of the collecting component is located at the corner of the U-shaped groove section, which is conducive to the heat exchange medium outlets of each part of the third groove merging into the collecting outlet channel and flowing out from the collecting component outlet in time; one heat exchange medium outlet is located at the corner of the U-shaped groove section, which is conducive to the heat exchange medium outlet merging into the collecting outlet channel and flowing out from the collecting component outlet in time; one 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 extended groove section away from the U-shaped groove section. On the basis of facilitating the heat exchange medium outlets of the two heat exchange media merging into the collecting outlet channel and flowing out from the collecting component outlet in time, the length of the third groove and the collecting outlet channel is shortened, and the flow resistance of the heat exchange medium in the collecting outlet channel is reduced.

[0017] In some embodiments of the battery pack, the first straight groove portion and the second straight groove portion of the U-shaped groove section are both parallel to the edge of the pipe connecting end and are at an equal distance from the edge of the pipe connecting end, and the third straight groove portion of the U-shaped groove section is located on the side of the second straight groove portion away from the edge of the pipe connecting end; the extended groove section includes an oblique groove portion and a fourth straight groove portion, the fourth straight groove portion is parallel to the first straight groove portion and is farther away from the edge of the pipe connecting end than the first straight groove portion, and the oblique groove portion connects the second straight groove portion and the fourth straight groove portion.

[0018] The structural arrangement and positional relationship of the second and third grooves facilitates full utilization of the heat exchange plate's surface area, shortening the length of the current collection inlet and outlet channels while still meeting the function of the current collection component, thereby reducing the flow resistance of the heat exchange medium within these channels. Furthermore, the length of the pipes that introduce and remove the heat exchange medium to and from the heat exchange plates within the battery pack casing is shortened, reducing the complexity of the pipes and minimizing the internal space occupied by these pipes.

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

[0020] The distances between the inlet of the collecting component and the outlet of the collecting component and the edge of the pipe connection end of the heat exchange plate are equal, which is beneficial to the arrangement of pipe fittings in the box for introducing heat exchange medium into the heat exchange plate and leading heat exchange medium out of the heat exchange plate. For example, it is beneficial to use pipe fittings of unified structure to reduce the design and production costs of pipe fittings, and also facilitates the assembly of the heat exchange system and the box.

[0021] In the battery pack of some embodiments, the current collecting component inlet and the current collecting component outlet are respectively located at substantially the same position as the corresponding tube holes along the extension direction of the box wall.

[0022] By making the positions of the two tube holes in the direction of extension of the box wall substantially the same as the positions of the flow collecting component inlet and / or the flow collecting component outlet, the size of the joint and the internal space occupied by the box can be reduced.

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

[0024] The first ends of the two connectors are respectively fixedly connected to the current collecting component and are respectively connected opposite to the inlet and outlet of the current collecting component. The second ends of the two connectors are respectively fixedly connected to the box wall through the corresponding pipe holes. The connectors are firmly connected to the current collecting component 13 and the box wall, which is conducive to making the structure of the connector more compact and reducing the internal space of the box occupied by the connector.

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

[0026] The joint is welded to the hole wall of the corresponding pipe hole, and there is no need to use the flange provided for connecting the pipeline and the box body in the related art, which is further conducive to reducing the internal space of the box body occupied by the pipeline.

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

[0028] The joint includes a first flow channel portion, a second flow channel portion and a pipe head. Through the angle between the first flow channel portion and the second flow channel portion, the first end of the first flow channel portion can be directly opposite to the inlet or outlet of the collecting component, and the second end of the second flow channel portion can be directly opposite to the corresponding pipe hole. The pipe head can be connected to the pipeline outside the box, thereby realizing the function of introducing heat exchange medium into the heat exchange plate or leading heat exchange medium out of the heat exchange plate.

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

[0030] The temperature measuring part can be provided to integrate the temperature sensor on the joint so as to detect the temperature of the heat exchange medium in the joint.

[0031] In some embodiments of the battery pack, the connector further includes an extension portion, which is disposed at the second end of the second flow channel portion and extends from the second flow channel portion along the extension direction of the first flow channel portion toward a direction away from the second flow channel portion and is disposed side by side with the first flow channel portion, and the second flow channel portion and the extension portion have a welding surface that matches the shape of the hole wall of the corresponding tube hole.

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

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

[0034] The positioning portion is provided to facilitate accurate positioning of the joint and the heat exchange plate, and 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, arranged at the first end of the first flow channel portion, configured to be plugged into and fitted with the inlet of the current collecting component or the outlet of the current collecting component; and / or a first positioning surface, configured to fit with the edge of the pipe connection end; and / or a second positioning surface, configured to fit with the edge of the current collecting component on a side close to the joint; and / or a positioning protrusion, configured to fit with the shape of a positioning recess provided on the edge of the pipe connection end.

[0036] The positioning portion includes a positioning ring, which is conducive to the accurate positioning of the joint and the collecting component inlet or the collecting component outlet of the collecting component. The positioning portion includes a first positioning surface, a second positioning surface and / or a positioning protrusion, which are conducive to the accurate positioning of the joint and the heat exchange plate as a whole or in part, thereby facilitating the accurate positioning of the joint and the heat exchange plate, and facilitating rapid and accurate assembly between the two and between the joint and the box wall.

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

[0038] Providing a connecting portion connecting the first flow channel portion and the extension portion enhances the overall strength of the joint without substantially increasing the internal space occupied by the housing, and also helps to increase the stability of the connection 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 provided on a side of the connecting portion away from the second flow channel portion, so that the connecting portion integrates at least part of the positioning function of the positioning portion.

[0039] A second aspect of the present application provides an electrical device, comprising the battery pack described in the first aspect of the present application, wherein the battery pack is 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 the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0043] Figure 1 This is a schematic diagram of the structure of electrical equipment in some embodiments of the present application.

[0044] Figure 2 This is a schematic structural diagram of the battery pack of some embodiments of the present application.

[0045] Figure 3 This is a schematic structural diagram of the combined structure of the battery pack box and the heat exchange system in some embodiments of the present application.

[0046] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A.

[0047] Figure 5 for Figure 3 The right view structural diagram of the combined structure shown.

[0048] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of part B.

[0049] Figure 7 for Figure 3 Schematic diagram of the exploded structure of the heat exchange system of the battery pack of the illustrated embodiment.

[0050] Figure 8 for Figure 3 A schematic top view of the battery pack of the illustrated embodiment.

[0051] Figure 9 for Figure 3 A schematic front view of the battery pack of the illustrated embodiment.

[0052] Figure 10 for Figure 9 Schematic diagram of the enlarged structure of part C.

[0053] Figure 11 for Figure 3 A bottom-up structural diagram of the heat exchange system of the battery pack of the illustrated embodiment.

[0054] Figure 12 for Figure 3 A schematic structural diagram of the current collecting components of the heat exchange system of the battery pack of the illustrated embodiment.

[0055] Figure 13 for Figure 3 Schematic diagram of the three-dimensional structure of the joint of the current collecting component of the heat exchange system of the battery pack of the illustrated embodiment.

[0056] Figure 14 for Figure 12 Schematic diagram of the front view of the joint shown.

[0057] Figure 15 for Figure 12 Schematic diagram of the bottom view of the joint shown.

[0058] Figures 1 to 15 In the figure, each reference numeral represents: D. Electrical equipment; B. Battery pack; C. Battery box; 10. Heat exchange plate; 10A. Heat exchange area; 10E. Pipe connection end; 101. Heat exchange channel; 1011. Regional heat exchange channel section; 1012. Heat exchange channel distribution section; 1013. Heat exchange channel converging section; 102. Collecting flow inlet channel; 103. Collecting flow outlet channel; 11. Channel plate; 111. First groove; 12. Plane plate; 12A. Heat exchange medium inlet; 12B. Heat exchange medium outlet; 13. Collecting component; 131. Second groove; 1311. First straight slot; 132, third groove; 1321, U-shaped groove section; 13211, corner portion; 13212, second straight groove portion; 13213, third straight groove portion; 1322, extended groove section; 13221, oblique groove portion; 13222, fourth straight groove portion; 13A, current collecting component inlet; 13B, current collecting component outlet; 20. Box body; 21. Box wall; 21A. Pipe hole; 22. Expansion beam; 30. Connector; 31. First flow channel; 32. Second flow channel; 33. Pipe head; 34. Temperature measuring portion; 34A. Sensor mounting portion; 35. Extension portion; 301. Welding surface; 36. Connecting portion; 37. Positioning portion; 371. Positioning ring; 372. First positioning surface; 373. Second positioning surface; 374. Positioning protrusion; 40. Battery pack; 41. Battery cell; 60. Box cover; H. Weld. DETAILED DESCRIPTION

[0059] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0060] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0061] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0062] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0063] During the development of this application, the inventors discovered that, as described in the background art, the battery pack suffers from significant temperature differences within the battery pack and the pipes connecting the heat exchange plate and the two tube holes require considerable space within the housing. The heat exchange plate of the related art (corresponding to the heat exchange plate body of this application) is provided with a heat exchange channel and a heat exchange medium inlet and outlet connected to the heat exchange channel. The heat exchange medium inlet and outlet are connected to the input and output pipes, respectively, external to the heat exchange plate. Since the battery pack has only one input pipe and one output pipe, the corresponding heat exchange plate is usually only provided with one heat exchange medium inlet and one heat exchange medium outlet. Each part of the flow channel in the heat exchange flow path in the heat exchange plate needs to enter and exit the heat exchange medium from 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 the series flow channels, the position of the heat exchange medium inlet and the heat exchange medium outlet, etc., resulting in that the setting position of the heat exchange medium inlet and the heat exchange medium outlet is difficult to simultaneously match well with the inlet and outlet ends of the heat exchange flow channel structure of different heat exchange areas. There are phenomena such as inconsistent heat exchange flow channel structures, uneven flow distribution, and different heat exchange medium temperatures in multiple heat exchange areas, resulting in uneven heat exchange between different battery packs or different battery cells and the heat exchange plate, and thus causing excessive temperature difference inside the battery pack. In order to allow the pipes for inputting heat exchange medium to the heat exchange plate and the pipes for outputting heat exchange medium from the heat exchange plate to enter and exit the battery pack, two pipe holes are set on the battery pack box. Due to the limited setting positions of the heat exchange medium inlet and heat exchange medium outlet, the two pipe holes and the heat exchange medium inlet and heat exchange medium outlet on the flat plate are usually staggered. Therefore, the pipe fittings of each of the two pipelines in the box usually require at least two elbows. Therefore, the pipe fittings of the pipelines in the box need to occupy more layout space.

[0064] Based on this, the present application proposes a battery pack, in which a current collecting component having a current collecting component inlet and a current collecting component outlet is added to the heat exchange plate main body, and two joints are set as pipe fittings for each of the two pipelines in the box body. After the heat exchange plate main body and the current collecting component are assembled, a current collecting inlet channel connecting the heat exchange medium inlet and the current collecting component inlet and a current collecting outlet channel connecting the heat exchange medium outlet and the current collecting component outlet are formed. After adding the collecting components, the design flexibility of the heat exchange medium inlet and the heat exchange medium outlet can be increased. For example, a suitable number of heat exchange medium inlets with suitable opening areas are set at a suitable position on the heat exchange plate body opposite to the collecting inlet channel, and a suitable number of heat exchange medium outlets with suitable opening areas are set at a suitable position on the heat exchange plate body opposite to the collecting outlet channel. This is conducive to better matching the setting of the heat exchange medium inlet and the heat exchange medium outlet with the structure of the heat exchange flow channels in different heat exchange areas and the positions of the inlet and outlet ends. In addition, since the position and number of the heat exchange medium inlet and the heat exchange medium outlet can be flexibly adjusted, the flexibility of the structural design of the heat exchange flow channels is increased, and the structure of the heat exchange flow channels in multiple heat exchange areas can be set to make the flow distribution more uniform, which is conducive to reducing the temperature difference inside the battery pack. When the inlet and outlet of the collecting component are respectively connected to the pipe holes on the box wall of the box through joints, it is beneficial to shorten the length of the pipes for introducing the heat exchange medium to the heat exchange plate and leading the heat exchange medium out of the heat exchange plate inside the box of the battery pack and reduce the complexity of the pipe structure. The function of the pipes for introducing the heat exchange medium to the heat exchange plate and leading the heat exchange medium out of the heat exchange plate inside the box can be realized through the joints, which is beneficial to simplifying the structure and facilitating the assembly of the heat exchange system and the box. At the same time, the structure of the joint is relatively compact, which is beneficial to reducing the occupied internal space of the box.

[0065] Furthermore, the present application also proposes an electrical device comprising the battery pack.

[0066] The battery pack is configured to provide electrical energy to electrical devices. Electrical devices may include, but are not limited to, mobile phones, portable devices, laptop computers, electric vehicles, electric cars, ships, spacecraft, electric toys, and electric tools. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include fixed 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.

[0067] 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 that encloses the battery cells. This housing prevents liquids and other foreign matter from affecting the charging or discharging of the cells.

[0068] Multiple battery cells are connected in parallel or series to form a battery pack, providing higher voltage and capacity. Battery packs can meet the power needs of different applications. Connecting battery cells in series increases the overall voltage, while connecting them in parallel increases the overall capacity.

[0069] A battery module is a unit of a battery pack consisting of multiple battery cells. A battery module typically includes a protective structure to protect the battery pack. The protective structure is used to protect the battery pack from damage caused by the external environment.

[0070] A battery cell refers to the smallest unit that makes up a battery. In this application, battery cells 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, and the like, and this embodiment of the application does not limit this. Battery cells may be flat, rectangular, or in other shapes, and this embodiment of the application does not limit this. Battery cells are generally packaged as prismatic battery cells and soft-pack battery cells, and this embodiment of the application does not limit this.

[0071] like Figure 2 and Figure 15 As shown, the battery pack B provided in the embodiment of the present application 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 flow collecting 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 connected to the heat exchange channel 101. The flow collecting component 13 has a flow collecting component inlet 13A and a flow collecting component outlet 13B, which are arranged at the pipe connection end 10E of the heat exchange plate body, cover the heat exchange medium inlet 12A and the heat exchange medium outlet 12B, and form a flow collecting inlet channel 102 connecting the heat exchange medium inlet 12A and the flow collecting component inlet 13A and a flow collecting outlet channel 103 connecting the heat exchange medium outlet 12B and the flow collecting component outlet 13B with the heat exchange plate body. The heat exchange plate 10 and the battery pack 40 are located in the housing 20. Two pipe holes 21A corresponding to the flow collecting component inlet 13A and the flow collecting component outlet 13B are respectively provided on the box wall 21 of the box body 20 near the pipeline connection end 10E. The flow collecting component inlet 13A and the flow collecting component outlet 13B are connected to the corresponding two pipe holes 21A through two joints 30 respectively.

[0072] In the battery pack B of the embodiment of the present application, after adding the collecting component 13, the design flexibility of the heat exchange medium inlet 12A and the heat exchange medium outlet 12B can be increased. For example, a suitable number of heat exchange medium inlets 12A with a suitable opening area are set at a suitable position on the heat exchange plate body opposite to the collecting inlet channel 102, and a suitable number of heat exchange medium outlets 12B with a suitable opening area are set at a suitable position on the heat exchange plate body opposite to the collecting outlet channel 103, so as to facilitate the heat exchange medium inlet 12A and the heat exchange medium outlet 12B to better match the structure and the inlet and outlet positions of the heat exchange flow channels 101 in different heat exchange areas. In addition, since the position, number and opening area of ​​the heat exchange medium inlet 12A and the heat exchange medium outlet 12B can be flexibly adjusted, it is conducive to increasing the flexibility of the structural design of the heat exchange flow channels 101. The structure of the heat exchange flow channels 101 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 B and prevent the performance of the battery pack from being reduced due to inadequate temperature control. When the flow collecting component inlet 13A and the flow collecting component outlet 13B are connected to the tube hole 21A on the box wall 21 of the box body 20 respectively through the joint 30, since the flow collecting component inlet 13A can be connected to the heat exchange medium inlet 12A through the flow collecting introduction channel 102, and the flow collecting component outlet 13B can be connected to the heat exchange medium outlet 12B through the flow collecting outlet channel 103, the flow collecting component inlet 13A can be set at a position as close to the corresponding tube hole 21A as possible in communication with the flow collecting introduction channel 102, and the flow collecting component outlet 13B can be set at a position as close to the corresponding tube hole 21A as possible in communication with the flow collecting introduction channel 102. The collecting and outlet channels 103 are connected as close as possible to the corresponding tube holes 21A. Therefore, it is beneficial to shorten the length of the pipes for introducing the heat exchange medium into the heat exchange plate 10 and leading the heat exchange medium out of the heat exchange plate 10 in the box of the battery pack and reduce the complexity of the pipe structure. The functions of the pipes for introducing the heat exchange medium into the heat exchange plate and leading the heat exchange medium out of the heat exchange plate in the box can be realized through the joints, which is beneficial to simplifying the structure and facilitating the assembly of the heat exchange system and the box. At the same time, the structure of the joints is relatively compact, which is beneficial to reducing the internal space occupied by the box.

[0073] The heat exchange medium is, for example, a liquid. The type of liquid can be selected according to the working environment of the battery pack, for example, it can be water or a mixture of ethylene glycol and water.

[0074] 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. The flat plate 12 is provided with a heat exchange medium inlet 12A and a heat exchange medium outlet 12B. The flow collecting component 13 is fixedly connected to the flat plate 12 and is disposed on both sides of the flow channel plate 11.

[0075] The heat exchange plate body includes a flow channel plate 11 and a flat plate 12. The collecting component 13 is fixedly connected to the flat plate 12 and is arranged on both sides of the flat plate 12 with the flow channel plate 11, which is convenient for 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. It is convenient to design the structure of the collecting component 13 to design the collecting component inlet 13A, the collecting component outlet 13B, the collecting introduction channel 102 and the collecting outlet channel 103, so as to adapt to the structural design of the heat exchange plate body as much as possible.

[0076] like Figures 7 to 12 As shown, in some embodiments of the battery pack, the current collecting component 13 includes a second groove 131 and a third groove 132 isolated from the second groove 131. The current collecting component inlet 13A communicates with the second groove 131. The current collecting component outlet 13B communicates with the third groove 132. The heat exchange plate body, the second groove 131, and the third groove 132 respectively form a current collecting inlet channel 102 and a current collecting outlet channel 103.

[0077] The collecting component 13 includes a second groove 131 and a third groove 132 isolated from the second groove 131. The collecting component inlet 13A, the collecting component outlet 13B, the collecting inlet channel 102 and the collecting outlet 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.

[0078] 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 of which communicates 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 of which communicates with the outlet end of at least one regional heat exchange channel segment 1011.

[0079] When the heat exchange channel 101 includes multiple regional heat exchange channel sections 1011, the heat exchange plate body is provided with multiple heat exchange medium inlets 12A. When each heat exchange medium inlet 12A is connected to the inlet end of at least one regional heat exchange channel section 1011, the heat exchange medium entering the collecting flow introduction channel 102 is reasonably distributed to the multiple regional heat exchange channel sections 1011 through the multiple heat exchange medium inlets 12A, which is conducive to more uniform flow distribution of the multiple regional heat exchange channel sections 1011, and is conducive to reducing the temperature difference of the battery cells 41 cooled by the multiple heat exchange regions 10A, thereby This is beneficial to reducing the temperature difference inside the 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 section 1011, which is beneficial to smoothly exporting the heat exchange medium in multiple regional heat exchange flow sections 1011 to the collecting inlet channel 102 through multiple heat exchange medium outlets 12B, and is also beneficial to making the flow distribution of multiple regional heat exchange flow sections 1011 more uniform, which is beneficial to reducing the temperature difference of the battery cells 41 cooled by multiple heat exchange areas 10A, thereby reducing the temperature difference inside the battery pack B.

[0080] 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 pipeline connection end 10E, the heat exchange medium inlet 12A is connected to the heat exchange channel distribution section 1012, and 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 ends of more than two regional heat exchange channel sections 1011 and a heat exchange medium outlet 12B.

[0081] By providing the heat exchange channel distribution section 1012, the heat exchange channel distribution section 1012 can achieve reasonable distribution of the flow of multiple regional heat exchange channel sections 1011 within the heat exchange channel 101, which helps reduce the number of heat exchange medium inlets 12A and the complexity of the flow collection and introduction channel 102. By providing multiple heat exchange channel converging sections 1013, the heat exchange medium can be promptly discharged from each heat exchange channel converging section 1013 to the flow collection and outlet channel 103 through the multiple heat exchange channel converging sections 1013 and the multiple heat exchange medium outlets 12B, which helps to evenly distribute the heat exchange medium flow within the multiple heat exchange channel converging sections 1013.

[0082] 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, and the current collecting component 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 a plurality of heat exchange medium outlets 12B, the third groove 132 includes a U-shaped groove section 1321 and an extended groove section 1322 connected to a free end of the U-shaped groove section 1321, wherein the current collecting component 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 extended groove section 1322 away from the U-shaped groove section 1321.

[0083] The flow collecting component inlet 13A and the heat exchange medium inlet 12A are located at either end of the first straight groove portion 1311 of the second groove 131, respectively. This facilitates 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 flow collecting inlet channel 102, and reduces the flow resistance of the heat exchange medium within the flow collecting inlet channel 102. Multiple heat exchange medium outlets 12B are provided on the heat exchange plate body, and when the third groove 132 includes a U-shaped groove section 1321 and an extended groove section 1322, this facilitates adapting to the structure of the heat exchange channel 101, allowing the heat exchange medium from each heat exchange medium outlet 12B to be merged into the flow collecting outlet channel 103, thereby reducing the size and space occupied by the flow collecting component 13. The outlet 13B of the collecting component is located at the corner 13211 of the U-shaped groove section 1321, which is conducive to the heat exchange medium outlets 12B of each part of the third groove 132 merging into the collecting outlet channel 103 and flowing out from the outlet 13B of the collecting component in time; one heat exchange medium outlet 12B is located at the corner 13211 of the U-shaped groove section 1321, which is conducive to the heat exchange medium outlet 12B merging into the collecting outlet channel 103 and flowing out from the outlet 13B of the collecting component in time; one 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 extended groove section 1322 away from the U-shaped groove section 1321. On the basis of facilitating the two heat exchange medium outlets 12B to merge and enter the collecting and outlet channel 103 so that the heat exchange medium can flow out from the collecting component outlet 13B in time, the length of the third groove 132 and the collecting and outlet channel 103 is shortened, thereby reducing the flow resistance of the heat exchange medium in the collecting and outlet channel 103.

[0084] like Figures 7 to 12As shown, in some embodiments of the battery pack B, the first straight groove portion 1311 and the second straight groove portion 13212 of the U-shaped groove section 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 portion 13213 of the U-shaped groove section 1321 is located on the side of the second straight groove portion 13212 away from the edge of the pipe connection end 10E. The extended groove section 1322 includes an oblique 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 oblique groove portion 13221 connects the second straight groove portion 13212 and the fourth straight groove portion 13222.

[0085] 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 shortens the length of the current collecting inlet channel 102 and the current collecting outlet channel 103 while still meeting the function of the current collecting component 13, thereby reducing the flow resistance of the heat exchange medium within the current collecting inlet channel 102 and the current collecting outlet channel 103. Furthermore, the length of the pipes introducing the heat exchange medium to and from the heat exchange plate 10 within the housing 20 of the battery pack B is shortened, the complexity of the pipe structures is reduced, and the internal space of the housing 20 occupied by these pipes is reduced.

[0086] like Figures 7 to 12 As shown, in some embodiments of the battery pack B, the distance between the current collecting component inlet 13A and the edge of the pipe connection end 10E of the heat exchange plate 10 is equal to the distance between the current collecting component outlet 13B and the edge of the pipe connection end 10E of the heat exchange plate 10.

[0087] The distances between the inlet 13A and the outlet 13B of the collecting component and the edge of the pipe connection end 10E of the heat exchange plate 10 are equal, which is beneficial to the arrangement of pipes in the box 20 for introducing heat exchange medium into the heat exchange plate 10 and leading heat exchange medium out of the heat exchange plate 10. For example, it is beneficial to use pipes with a unified structure to reduce the design and production costs of the pipes, and it is also convenient to assemble the heat exchange system and the box 20.

[0088] like Figures 2 to 6 As shown, in the battery pack B of some embodiments, the current collecting component inlet 13A and the current collecting component outlet 13B are respectively located at substantially the same position as the corresponding tube hole 21A along the extension direction of the box wall 21 .

[0089] By making the positions of the two tube holes 21A and the current collecting component inlet 13A and the current collecting component outlet 13B substantially the same in the direction in which the box wall 21 extends, the size of the joint and the internal space occupied by the box body 20 can be reduced.

[0090] For example, the centerline of one of the two tube holes 21A can be coplanar with the centerline of the manifold inlet 13A, while the centerline of the other tube hole 21A can be coplanar with the centerline of the manifold outlet 13B. Furthermore, the centerline of one of the two tube holes 21A can be perpendicular to the centerline of the manifold inlet 13A, while the centerline of the other tube hole 21A can be perpendicular to the centerline of the manifold outlet 13B. This arrangement of the centerlines of the two tube holes 21A being perpendicular to the centerlines of the manifold inlet 13A and the manifold outlet 13B, respectively, conforms to the arrangement where the heat exchange plate 10 and the tank wall 21 are perpendicular to each other, facilitating the processing of the manifold inlet 13A and the manifold outlet 13B.

[0091] like Figures 3 to 11 As shown, in some embodiments of the battery pack B, the first ends of the two connectors 30 are respectively fixedly connected to the current collecting component 13 and are respectively connected opposite to the current collecting component inlet 13A and the current collecting component outlet 13B, and the second ends of the two connectors 30 are respectively fixedly connected to the box wall 21 through the corresponding tube holes 21A.

[0092] The first ends of the two connectors 30 are respectively fixedly connected to the current collecting component 13 and are respectively connected to the current collecting component inlet 13A and the current collecting component outlet 13B relative to each other. The second ends of the two connectors 30 are respectively fixedly connected to the box wall 21 through the corresponding pipe holes 21A. The connectors 30 are firmly connected to the current collecting component 13 and the box wall 21, which is conducive to making the structure of the connector 30 more compact and reducing the internal space of the box body 20 occupied by the connector 30.

[0093] like Figures 3 to 11 As shown, in the battery pack B of some embodiments, the connector 30 is welded to the hole wall of the corresponding tube hole 21A.

[0094] The joint 30 is welded to the hole wall of the corresponding pipe hole 21A, eliminating the need for a flange used in related art to connect the pipeline and the box body, which further helps reduce the internal space of the box body 20 occupied by the pipeline.

[0095] 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. The first end of the first flow channel portion 31 forms the first end of the connector 30. The second flow channel portion 32 is arranged at an angle to the first flow channel portion 31. The first end of the second flow channel portion 32 is connected to the second end of the first flow channel portion 31. The first end of the tube head 33 is connected to the second flow channel portion 32. The second end of the tube head 33 forms the second end of the connector 30.

[0096] The joint 30 includes a first flow channel portion 31, a second flow channel portion 32 and a pipe head 33. The angle between the first flow channel portion 31 and the second flow channel portion 32 can make the first end of the first flow channel portion 31 face the inlet 13A or the outlet 13B of the collecting component, and the second end of the second flow channel portion 32 face the corresponding pipe hole 21A. The pipe head 33 can be connected to the pipeline outside the box body 20, thereby realizing the function of introducing heat exchange medium into the heat exchange plate 10 or leading heat exchange medium out of the heat exchange plate 10.

[0097] like Figures 7 to 11 、 Figures 13 to 15 As shown, in some embodiments of battery pack B, connector 30 further includes a temperature measuring portion 34. Temperature measuring portion 34 includes a sensor mounting portion 34A. Battery pack B includes a temperature sensor. The temperature sensor is configured to detect the temperature of the heat exchange medium within connector 30 and is mounted on connector 30 via sensor mounting portion 34A.

[0098] The temperature measuring portion 34 may be provided to integrate a temperature sensor on the joint 30 so as to detect the temperature of the heat exchange medium in the joint 30 .

[0099] The temperature measuring portion 34 may be provided at the connection between the first flow channel portion 31 and the second flow channel portion 32 , and this arrangement is also beneficial for enhancing the connection strength between the first flow channel portion 31 and the second flow channel portion 32 .

[0100] 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 portion 35. The extension portion 35 is disposed at the second end of the second flow channel portion 32 and extends from the second flow channel portion 32 along the extension direction of the first flow channel portion 31 in a direction away from the second flow channel portion 32 and is disposed side by side with the first flow channel portion 31. The second flow channel portion 32 and the extension portion 35 have a welding surface 301 that matches the shape of the hole wall of the corresponding tube hole 21A.

[0101] The joint 30 further includes an extension portion 35 . The second flow channel portion 32 and the extension portion 35 have welding surfaces 301 that match the shape of the hole wall of the corresponding pipe hole 21A, which facilitates accurate positioning and firm connection between the joint 30 and the pipe hole 21A.

[0102] 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 a relative position between the connector 30 and the heat exchange plate 10 .

[0103] The positioning portion 37 is provided to facilitate accurate positioning of the joint 30 and the heat exchange plate 10 , thereby facilitating quick and accurate assembly between the joint 30 and the box wall 21 .

[0104] like Figures 7 to 11 、 Figures 13 to 15 As shown, in some embodiments of the battery pack B, the positioning portion 37 includes: a positioning ring 371, which is arranged at the first end of the first flow channel portion 31 and is configured to be plugged into and fitted with the current collecting component inlet 13A or the current collecting component outlet 13B; and / or a first positioning surface 372, which is configured to fit with the edge of the pipe connection end 10E; and / or a second positioning surface 373, which is configured to fit with the edge of the current collecting component 13 on the side close to the connector 30; and / or a positioning protrusion 374, which is configured to fit with the shape of a positioning recess provided on the edge of the pipe connection end 10E.

[0105] The positioning portion 37 includes a positioning ring 371, which is conducive to the accurate positioning of the joint 30 and the collecting component inlet 13A or the collecting component outlet 13B of the collecting component 13. The positioning portion 37 includes a first positioning surface 372, a second positioning surface 373 and / or a positioning protrusion 374, which are conducive to achieving the overall or partial accurate positioning of the joint 30 and the heat exchange plate 10, thereby facilitating the accurate positioning of the joint 30 and the heat exchange plate 10, and facilitating rapid and accurate assembly between the two and between the joint 30 and the box wall 21.

[0106] like Figures 7 to 11 、 Figures 13 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 and 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 provided on a side of the connecting portion 36 away from the second flow channel portion 32.

[0107] The connection portion 36 is provided to connect the first flow channel portion 31 and the extension portion 35, thereby enhancing the overall strength of the joint 30 without substantially increasing the internal space occupied by the housing 20. This also helps to increase the stability of the connection between the joint 30 and the housing 20 and 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 connection portion 36 away from the second flow channel portion 32, so that the connection portion 36 integrates at least part of the positioning function of the positioning portion 37.

[0108] like Figure 1 As shown, the present application provides an electric device, which includes a battery pack B according to an embodiment of the present application, and the battery pack B is used to provide power to the electric device D.

[0109] The electrical equipment D provided in this application has the same advantages as the battery pack B provided in this application.

[0110] The following combination Figures 1 to 15 The battery pack B and the electrical device D having the battery pack B in some embodiments of the present application are described in more detail.

[0111] Please refer to Figure 1. Figure 1 This is a schematic diagram of the structure of a vehicle D, an electrical device provided in some embodiments of the present application. Vehicle D can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. Figure 2 The vehicle D is provided with a battery pack B inside. The battery pack B can be provided at the bottom, head, or tail of the vehicle D. The battery pack B can be used to power the vehicle D, for example, as an operating power source for the vehicle D.

[0112] In some embodiments of the present application, the battery pack B can not only serve as the operating power source of the vehicle D, but also serve as the driving power source of the vehicle D, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle D.

[0113] like Figure 2 As shown, battery pack B includes a battery case C and multiple battery packs 40 disposed within the battery case C. The battery case C includes a case body 20 and a case cover 60 that snaps onto the case body 20. The battery packs 40 include multiple battery cells 41 arranged side by side. The number and position of the battery packs 40 can be configured based on the requirements of the battery pack B. For example, the number of battery packs 40 can be one, two, three, six, etc.

[0114] Figure 3 A schematic diagram illustrates the combined structure of the housing 20 and heat exchange system of a battery pack B in some embodiments of the present application. The heat exchange system primarily comprises 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 mounted 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 within the multiple battery packs 40.

[0115] The heat exchange plate 10 includes a flow channel plate 11, a flat plate 12 and a flow collecting component 13. The flow channel plate 11 and the flat plate 12 constitute the heat exchange plate body.

[0116] The flow channel plate 11 includes a first groove 111. The planar plate 12 is fixedly connected to the flow channel plate 11 and covers the first groove 111 to form the heat exchange flow channel 101. The planar plate 12 is provided with a heat exchange medium inlet 12A and three heat exchange medium outlets 12B communicating with the heat exchange flow channel 101.

[0117] The flow collecting component 13 is located at the pipe connection end 10E of the heat exchange plate 10. The flow collecting component 13 includes a second groove 131, a flow collecting component inlet 13A connected to the second groove 131, a third groove 132, and a flow collecting component outlet 13B connected to the third groove 132. The flow collecting component 13 is fixedly connected to the planar plate 12 and is located on either side of the flow channel plate 11. The planar plate 12 covers the second groove 131 to form a flow collecting inlet channel 102 that connects the heat exchange medium inlet 12A and the flow collecting component inlet 13A. The planar plate 12 covers the third groove 132 to form a flow collecting outlet channel 103 that connects the heat exchange medium outlet 12B and the flow collecting component outlet 13B. The flow collecting component 13 is, for example, a flow collecting plate stamped from sheet metal.

[0118] The heat exchange channel 101 includes six regional heat exchange channel segments 1011 within six heat exchange regions 10A. The inlet and outlet of each regional heat exchange channel segment 1011 are located near the pipeline connection end 10E. Each regional heat exchange channel segment 1011 overall forms a U-shaped channel. Portions of the U-shaped channel can be divided into multiple branches. For example, the portion near the inlet can be divided into two parallel branches, while the portion near the outlet can be divided into three parallel branches.

[0119] The heat exchange channel 101 further includes a heat exchange channel distribution section 1012 extending along the edge of the pipeline 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.

[0120] The heat exchange channel 101 includes three heat exchange channel converging sections 1013. Each heat exchange channel converging section 1013 is connected to the outlet ends of two regional heat exchange channel sections 1011 and a heat exchange medium outlet 12B. That is, each heat exchange medium inlet 12A in the three heat exchange medium outlets 12B is connected to the outlet ends of two regional heat exchange channel sections 1011 through a heat exchange channel converging section 1013.

[0121] The second groove 131 includes a first straight groove portion 1311 . The flow collecting component inlet 13A and the heat exchange medium inlet 12A are respectively located at two ends of the first straight groove portion 1311 .

[0122] The third groove 132 includes a U-shaped groove section 1321 and an extended groove section 1322 connected to a free end of the U-shaped groove section 1321. The first straight groove portion 1311 and the second straight groove portion 13212 of the U-shaped groove section 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 portion 13213 of the U-shaped groove section 1321 is located on the side of the second straight groove portion 13212 that is away from the edge of the pipe connection end 10E. The extended groove section 1322 includes an oblique 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 oblique groove portion 13221 connects the second straight groove portion 13212 and the fourth straight groove portion 13222.

[0123] Figure 11 The locations of the heat exchange medium inlet 12A, three heat exchange medium outlets 12B, the flow collecting component inlet 13A, and the flow collecting component outlet 13B are marked with dotted lines. The flow collecting component outlet 13B is located at the corner 13211 of the U-shaped groove section 1321. One heat exchange medium outlet 12B is located at the corner 13211 of the U-shaped groove section 1321. One heat exchange medium outlet 12B is located at the other free end of the U-shaped groove section 1321. One heat exchange medium outlet 12B is located at the end of the extended groove section 1322 away from the U-shaped groove section 1321. The distance between the flow collecting component inlet 13A and the edge of the pipe connection end 10E of the heat exchange plate 10 is equal to the distance between the flow collecting component outlet 13B and the edge of the pipe connection end 10E of the heat exchange plate 10.

[0124] Two tube holes 21A are provided in the wall 21 of the housing 20 near the pipeline connection end 10E. One of the two tube holes 21A is located at the same position as the flow collecting component inlet 13A along the extension direction of the wall 21. The other of the two tube holes 21A is located at the same position as the flow collecting component outlet 13B along the extension direction of the wall 21. The two tube holes 21A are oriented perpendicularly to the directions of the flow collecting component inlet 13A and the flow collecting component outlet 13B, respectively.

[0125] The two joints 30 have the same structure and are arranged between the box wall 21 and the expansion beam 22. The same structure of the two joints 30 is conducive to reducing the design and production costs of the pipe fittings and also facilitates the assembly of the heat exchange system and the box body 20.

[0126] The first end of one of the two joints 30 is fixedly connected to the current collecting component 13 and communicates with the current collecting component inlet 13A. The second end passes through a tube hole 21A located at the same position as the current collecting component inlet 13A along the extension direction of the tank wall 21 and is welded to the wall of the tube hole 21A. The first end of the other of the two joints 30 is fixedly connected to the current collecting component 13 and communicates with the current collecting component outlet 13B. The second end passes through a tube hole 21A located at the same position as the current collecting component outlet 13B along the extension direction of the tank wall 21 and is welded to the wall of the tube hole 21A.

[0127] The joint 30 includes a first flow channel portion 31 , a second flow channel portion 32 , a pipe head 33 , a temperature measuring portion 34 , an extending portion 35 , a connecting portion 36 and a positioning portion 37 .

[0128] The first end of the first flow channel portion 31 forms the first end of the joint 30 .

[0129] The second flow channel portion 32 is perpendicular 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 .

[0130] A first end of the pipe head 33 is connected to the second flow channel portion 32 . A second end of the pipe head 33 forms a second end of the joint 30 .

[0131] The temperature measuring portion 34 is provided at the connection between the first flow channel portion 31 and the second flow channel portion 32. The temperature measuring portion 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 in the connector 30 and is mounted on the connector 30 through the sensor mounting portion 34A. The temperature sensor is, for example, an NTC temperature sensor, and the sensor mounting portion 34A is, for example, a threaded hole for mounting the NTC temperature sensor. The temperature of the heat exchange medium flowing in the connector 30 can be monitored by the NTC temperature sensor. Placing the temperature sensor at a corner of the connector 30 can make the temperature it measures closer to the actual temperature of the heat exchange medium.

[0132] The extension portion 35 is provided at the second end of the second flow channel portion 32 and extends from the second flow channel portion 32 in the direction away from the second flow channel portion 32 along the extension direction of the first flow channel portion 31 and is provided side by side with the first flow channel portion 31. The second flow channel portion 32 and the extension portion 35 have a welding surface 301 that matches the shape of the hole wall of the corresponding pipe hole 21A. The welding surface 301 of the joint 30 is welded to the hole wall of the pipe hole 21A, as shown in FIG. Figure 6 As shown, after welding is completed, a weld H is formed. The side and top of the connector 30 are welded to the box wall 21 to ensure the airtightness of the battery pack B.

[0133] The connecting portion 36 is connected to the first end of the first flow channel portion 31 and an end of the extending portion 35 away from the second flow channel portion 32 .

[0134] The positioning portion 37 is configured to define the relative position of the joint 30 and the heat exchange plate 10 to ensure that the position of the joint 30 is accurate. The positioning portion 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 provided at the first end of the first flow channel portion 31 and is configured to be plugged into and fitted with the inlet 13A or the outlet 13B of the collecting component. The first positioning surface 372 is provided on the connecting portion 36 and is configured to fit with the edge of the pipe connecting end 10E. The second positioning surface 373 is provided on the connecting portion 36 and is configured to fit with the edge of the collecting component 13 on the side close to the joint 30. The positioning protrusion 374 is provided on the connecting portion 36 and is configured to fit with the shape of the positioning recess provided on the edge of the pipe connecting end 10E. The positioning protrusion 374 is a U-shaped protrusion to facilitate entry into the positioning recess.

[0135] The battery pack B of the embodiment of the present application can achieve low-cost cross-connection of heat exchange channel sections 1011 in different areas of the heat exchange channel 101 by setting a collecting component 13, and can quickly achieve the expected flow distribution by changing the shape, layout position, opening area, layout position of the heat exchange medium inlet 12A and the heat exchange medium outlet 12B of the second groove 131 and the third groove 132 of the collecting component 13, and reduce the time required for the design of the heat exchange plate 10.

[0136] Simulation experiments have shown that, under the same simulated operating conditions, the battery pack B, equipped with a heat exchange plate with a current collector in the embodiment of the present application, can reduce the internal temperature difference of the battery pack from approximately 10°C to approximately 1°C, compared to a battery pack equipped with a heat exchange plate without a current collector in the related art. This reduced internal temperature difference in battery pack B can mitigate the impact of excessive temperature differences on the battery pack's lifespan.

[0137] Since the heat exchange system occupies less internal space of the box body 20, the energy density of the battery pack B can be effectively improved and the cost can be reduced.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solutions requested for protection in this application.

Claims

1. A battery pack (B), characterized in that: include: Battery Pack (40); A heat exchange plate (10) comprises a heat exchange plate body and a flow collecting component (13), wherein the heat exchange plate body comprises a heat exchange channel (101), a heat exchange medium inlet (12A) and a heat exchange medium outlet (12B) connected to the heat exchange channel (101), and the flow collecting component (13) has a flow collecting component inlet (13A) and a flow collecting component outlet (13B), is arranged at a pipeline connection end (10E) of the heat exchange plate body, covers the heat exchange medium inlet (12A) and the heat exchange medium outlet (12B), and forms a flow collecting inlet channel (102) connecting the heat exchange medium inlet (12A) and the flow collecting component inlet (13A), and a flow collecting outlet channel (103) connecting the heat exchange medium outlet (12B) and the flow collecting component outlet (13B); A box (20), the heat exchange plate (10) and the battery pack (40) are located in the box (20), and two pipe holes (21A) corresponding to the flow collecting component inlet (13A) and the flow collecting component outlet (13B) are provided on a box wall (21) of the box (20) near the pipeline connection end (10E); and Two joints (30), the flow collecting component inlet (13A) and the flow collecting component outlet (13B) are respectively connected to the corresponding two pipe holes (21A) through the two joints (30).

2. The battery pack (B) according to claim 1, characterized in that: The heat exchange plate body comprises: A flow channel plate (11) comprising 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); and the flow collecting component (13) is fixedly connected to the flat plate (12) and is arranged on both sides of the flat plate (12) and the flow channel plate (11).

3. The battery pack (B) according to claim 1, characterized in that: The flow collecting component (13) includes a second groove (131) and a third groove (132) isolated from the second groove (131); the flow collecting component inlet (13A) is connected to the second groove (131); the flow collecting component outlet (13B) is connected to the third groove (132); the heat exchange plate body and the second groove (131) and the third groove (132) respectively form the flow collecting inlet channel (102) and the flow collecting outlet channel (103).

4. The battery pack (B) according to claim 3, characterized in that: The heat exchange channel (101) includes a plurality of heat exchange channel sections (1011) within a plurality of heat exchange regions (10A); wherein, The heat exchange plate body is provided with a plurality of heat exchange medium inlets (12A), each of the heat exchange medium inlets (12A) being in communication with the inlet end of at least one of the regional 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 inlet (12A) is connected to the outlet end of at least one of the regional heat exchange flow channel sections (1011).

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

6. The battery pack (B) according to claim 4, characterized in that: 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 flow collecting component inlet (13A) and the heat exchange medium inlet (12A) are respectively located at two ends of the first straight groove portion (1311); and / or The heat exchange plate body is provided with a plurality of heat exchange medium outlets (12B), and the third groove (132) 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), wherein the flow collecting component outlet (13B) is located at a corner portion (13211) of the U-shaped groove section (1321), and / or one of the heat exchange medium outlets (12B) is located at a corner portion (13211) of the U-shaped groove section (1321), and / or one of the heat exchange medium outlets (12B) is located at the other free end of the U-shaped groove section (1321), and / or one of the heat exchange medium outlets (12B) is located at an end of the extension groove section (1322) away from the U-shaped groove section (1321).

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

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

9. The battery pack (B) according to any one of claims 1 to 8, characterized in that: The flow collecting component inlet (13A) and the flow collecting component outlet (13B) are respectively located at substantially the same position as the corresponding tube hole (21A) along the extension direction of the box wall (21).

10. The battery pack (B) according to claim 1, characterized in that: The first ends of the two connectors (30) are respectively fixedly connected to the flow collecting component (13) and are respectively connected oppositely to the flow collecting component inlet (13A) and the flow collecting component outlet (13B), and the second ends of the two connectors (30) are respectively passed through the corresponding pipe holes (21A) and are fixedly connected to the box wall (21).

11. The battery pack (B) according to claim 10, characterized in that: The joints (30) are respectively welded to the hole walls of the corresponding pipe holes (21A).

12. The battery pack (B) according to claim 10, characterized in that: The joint (30) comprises: a first flow channel portion (31), wherein a first end of the first flow channel portion (31) forms a first end of the joint (30); a second flow channel portion (32) arranged at an angle to the first flow channel portion (31), wherein a first end of the second flow channel portion (32) is connected to a second end of the first flow channel portion (31); and A pipe head (33), wherein a first end of the pipe head (33) is connected to the second flow channel portion (32), and a second end of the pipe head (33) forms a second end of the joint (30).

13. The battery pack (B) according to claim 12, characterized in that: The joint (30) further includes a temperature measuring portion (34), the temperature measuring portion (34) being arranged at the connection between the first flow channel portion (31) and the second flow channel portion (32), and the temperature measuring portion (34) including a sensor mounting portion (34A); The battery pack (B) includes a temperature sensor configured to detect the temperature of the heat exchange medium in the connector (30), and the temperature sensor is mounted on the connector (30) through the sensor mounting portion (34A).

14. The battery pack (B) according to claim 12, characterized in that: The joint (30) further includes an extension portion (35), the extension portion (35) being arranged at the second end of the second flow channel portion (32) and extending from the second flow channel portion (32) along the extension direction of the first flow channel portion (31) in a direction away from the second flow channel portion (32) and being arranged side by side with the first flow channel portion (31), the second flow channel portion (32) and the extension portion (35) having a welding surface (301) that matches the shape of the hole wall of the corresponding pipe hole (21A).

15. The battery pack (B) according to claim 12, characterized in that: The joint (30) further includes a positioning portion (37), and the positioning portion (37) is configured to define the relative position of the joint (30) and the heat exchange plate (10).

16. The battery pack (B) according to claim 15, characterized in that: The positioning portion (37) includes: a positioning ring (371), provided at the first end of the first flow channel portion (31), configured to be plugged into and fitted with the flow collecting component inlet (13A) or the flow collecting component outlet (13B); and / or The first positioning surface (372) is configured to fit the edge of the pipeline connection end (10E); and / or The second positioning surface (373) is configured to fit with an edge of the current collecting component (13) on a side close to the joint (30); and / or The positioning protrusion (374) is configured to match the shape of a positioning recess provided on the edge of the pipeline connection end (10E).

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

18. An electrical device (D), characterized in that: The battery pack (B) comprises the battery pack (B) according to any one of claims 1 to 17, wherein the battery pack (B) is used to provide power to the electrical device (D).

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