Battery box, battery and electric device

Abstract

The utility model relates to a battery box, a battery and an electric device. According to the battery box, two heat exchange channels are formed in a bottom plate and extend in a circuitous mode in the length direction of the bottom plate, and liquid inlets of the two heat exchange channels are formed in the two ends of the bottom plate in the length direction of the bottom plate and formed in one end of the bottom plate in the width direction of the bottom plate; the liquid outlets of the two heat exchange channels are formed in the end face, away from the liquid inlets of the heat exchange channels, of the bottom plate in the width direction of the bottom plate; the flow collecting plate is arranged on one side of the bottom plate in the width direction of the bottom plate and faces liquid outlets of the heat exchange channels, two flow collecting channels are arranged in the flow collecting plate, and liquid inlets of the flow collecting channels communicate with the liquid outlets of the corresponding heat exchange channels in an aligned mode. The liquid outlets of the flow collecting channels and the liquid inlets of the heat exchange channels corresponding to the flow collecting channels are formed in the same ends of the flow collecting plate and the bottom plate in the length direction of the bottom plate. The battery box, the battery and the electric device provided by the utility model continue to use the existing external circuit and pipeline design, and can improve the space utilization rate and the energy density.

Description

Technical Field

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

[0002] As the core component of energy storage and conversion, batteries have been widely used in new energy vehicles, energy storage power stations, ships, spacecraft and other fields.

[0003] Taking the application of batteries as power sources in the electric heavy-duty truck industry as an example, in order to quickly adapt to more heavy-duty truck models, the current battery systems in the heavy-duty truck industry generally use several batteries connected in series and parallel. These batteries are arranged on the battery rack of the heavy-duty truck, and generally there are two batteries arranged on the same layer, and these two batteries are arranged back to back.

[0004] There is a phenomenon of insufficient space utilization when two batteries are placed back to back. Specifically, in order to ensure the assembly gap, a certain distance is left between the two back-to-back batteries. This distance is generally controlled at 50 to 80 mm. If this distance is reasonably utilized, the energy density of the entire battery system can be improved.

[0005] However, the external wiring and piping for battery racks and battery connections are already in use. Designing a new battery would inevitably require redesigning these external wiring and piping, which would increase user costs. Industry technicians need to consider how to maximize compatibility with existing external wiring and piping designs while improving space utilization and energy density. Utility Model Content

[0006] Based on this, it is necessary to provide a battery box, battery and electrical device that can use the existing external line and pipeline design and improve space utilization and energy density to address the above problems.

[0007] A battery box, comprising:

[0008] a bottom plate having two independent heat exchange channels therein through which a heat exchange medium can flow, the two heat exchange channels being arranged sequentially along the length of the bottom plate and extending in a circuitous manner, the liquid inlets of the two heat exchange channels being arranged at opposite ends of the bottom plate along the length of the bottom plate and at the same end of the bottom plate along the width of the bottom plate, and the liquid outlets of the two heat exchange channels being arranged at an end surface of the bottom plate away from the liquid inlets of the heat exchange channels along the width of the bottom plate and being close to each other; and

[0009] A collecting plate is arranged on one side of the bottom plate along the width direction of the bottom plate and is arranged towards the liquid outlet of the heat exchange channel. The collecting plate has two independent collecting channels, the collecting channels correspond to the heat exchange channels one by one, and the liquid inlets of the collecting channels are aligned with and connected to the liquid outlets of the corresponding heat exchange channels. The liquid outlets of the collecting channels and the liquid inlets of the heat exchange channels corresponding to the collecting channels are respectively arranged at the same ends of the collecting plate and the bottom plate along the length direction of the bottom plate.

[0010] In some embodiments, the end surface of the bottom plate where the liquid outlet of the heat exchange channel is located is defined as the first end surface, and the surface of the bottom plate facing away from the first end surface is defined as the second end surface; the bottom plate has two heat exchange cavities arranged along the length direction of the bottom plate, the heat exchange cavities corresponding to the heat exchange channels one by one, and the heat exchange cavities pass through the first end surface and the second end surface;

[0011] The heat exchange cavity is structured to form a first rib and a second rib, which are alternately and spaced apart along the length direction of the bottom plate and define the heat exchange channel in the heat exchange cavity; the end surface of the first rib facing the first end surface is retracted relative to the first end surface, and defines a first turning section of the heat exchange channel with the first end surface; the end surface of the second rib facing the second end surface is retracted relative to the second end surface, and defines a second turning section of the heat exchange channel with the second end surface.

[0012] In some embodiments, the collecting plate blocks a portion of the opening of the heat exchange cavity located on the first end surface and communicating with the first turning section to form a sealed first turning section.

[0013] In some embodiments, the collecting plate has a collecting cavity therein, and a collecting inlet is provided on the surface of the collecting plate facing the liquid outlet of the heat exchange channel;

[0014] The battery box further includes an insert, which is embedded in the manifold cavity via the manifold inlet and separates the manifold inlet into two mutually independent first manifold inlet and second manifold inlet, and separates the manifold cavity into two independent first manifold cavity and second manifold cavity, and the manifold plate is provided with a first manifold outlet and a second manifold outlet at two opposite ends along the length direction of the bottom plate, respectively;

[0015] The first manifold inlet, the first manifold cavity and the first manifold outlet are connected in sequence to form one heat exchange channel, and the second manifold inlet, the second manifold cavity and the second manifold outlet are connected in sequence to form another heat exchange channel.

[0016] In some embodiments, the battery box also includes two transfer tubes, which correspond one-to-one to the two heat exchange channels and the two collecting channels. The transfer tubes are connected between the liquid outlet of the corresponding heat exchange channel and the liquid inlet of the corresponding collecting channel, and the transfer tubes are sealed with the bottom plate and the collecting plate.

[0017] In some embodiments, a first step is provided at the liquid outlet of the heat exchange channel, which is sunken relative to the liquid outlet of the heat exchange channel; a second step is provided at the liquid inlet of the collecting channel, which is sunken relative to the liquid inlet of the collecting channel; and the opposite ends of the transfer tube are respectively embedded in the first step and the second step.

[0018] In some embodiments, the battery box further includes two longitudinal beams and two transverse beams, wherein the two longitudinal beams are disposed on opposite sides of the bottom plate and the current collecting plate along the width direction of the bottom plate, and the two transverse beams are disposed on opposite ends of the bottom plate along the length direction of the bottom plate, and the transverse beam is connected between the two longitudinal beams;

[0019] The two longitudinal beams, the two transverse beams, the bottom plate and the current collecting plate jointly define a limiting space for the limiting battery module.

[0020] In some embodiments, the battery box further includes a partition beam, which is located in the limiting space. The partition beam extends along the width direction of the bottom plate and divides the limiting space into two sub-limiting spaces that limit the battery modules in a one-to-one correspondence.

[0021] A battery, comprising:

[0022] A battery box as described in any one of the above embodiments; and

[0023] a liquid inlet pipe assembly, comprising a main liquid inlet pipe and a branch liquid inlet pipe, wherein the main liquid inlet pipe is connected to the branch liquid inlet pipe, and opposite ends of the branch liquid inlet pipe are respectively connected to the two liquid inlets of the two heat exchange channels;

[0024] a liquid outlet pipe assembly, comprising a main liquid outlet pipe and a branch liquid outlet pipe, wherein the main liquid outlet pipe is connected to the branch liquid outlet pipe, and opposite ends of the branch liquid outlet pipe are respectively connected to the two liquid outlets of the two collecting channels;

[0025] Two battery modules are arranged on the bottom plate and the current collecting plate and arranged along the length direction of the bottom plate. The two battery modules exchange heat through the heat exchange medium in the two corresponding heat exchange channels respectively.

[0026] An electrical device includes the battery as described in the above embodiment, wherein the battery is used to supply power to the electrical device.

[0027] In the above-mentioned battery box, battery and electrical device, the positions of the liquid inlet and liquid outlet of one heat exchange channel are respectively the same as the positions of the liquid inlet and liquid outlet of a conventional back-to-back battery, and the positions of the liquid inlet and liquid outlet of another heat exchange channel are respectively the same as the positions of the liquid inlet and liquid outlet of another conventional back-to-back battery. In this case, the battery box in the present application can share the external pipeline design of the two conventional back-to-back batteries, reducing the difficulty of redesigning the pipeline and the user cost does not increase. In addition, when the battery box in the present application is used in a battery, the battery box can integrate two battery modules of the two conventional back-to-back batteries. In this way, while saving space and improving space utilization, it can also meet energy storage needs and improve energy density. In addition, when the battery box in the present application is used in a battery, electrical control panels can also be designed on the two end faces of the battery box in the present application that are relatively arranged along the length direction of the bottom plate to ensure that the external circuits of the battery box in the present application can be compatible with the conventional back-to-back two-battery solution without the need for new design and improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the connection between the battery box and the external pipeline in one embodiment of the present application;

[0029] Figure 2 This is a structural diagram of the battery box and two battery modules in one embodiment of the present application;

[0030] Figure 3 for Figure 2 The structural diagram of the battery box shown;

[0031] Figure 4 for Figure 3 An exploded view of the battery box is shown;

[0032] Figure 5 for Figure 4 The schematic diagram of the structure of the battery box shown is shown after removing the two cross beams, two longitudinal beams and the partition beam;

[0033] Figure 6 for Figure 5 An enlarged schematic diagram of a local structure A in the battery box shown;

[0034] Figure 7 for Figure 5 A right side view of the bottom plate in the battery box is shown;

[0035] Figure 8 for Figure 7 The cross-section of the bottom plate shown is along the BB direction;

[0036] Figure 9 for Figure 5The schematic diagram of the structure of the bottom plate and two adapter tubes in the battery box shown;

[0037] Figure 10 for Figure 9 An enlarged schematic diagram of a local structure C in the battery box shown;

[0038] Figure 11 for Figure 9 An enlarged schematic diagram of a local structure D in the battery box shown;

[0039] Figure 12 for Figure 5 The schematic diagram of the battery box from another perspective after removing the two adapter tubes;

[0040] Figure 13 for Figure 12 An enlarged schematic diagram of a local structure E in the battery box shown;

[0041] Figure 14 for Figure 12 An enlarged schematic diagram of the local structure F in the battery box is shown.

[0042] Figure Number:

[0043] 1000, battery;

[0044] 100, battery box; 200, battery module; 300, liquid inlet pipe assembly; 400, liquid outlet pipe assembly;

[0045] 10. Bottom plate; 20. Collector plate; 30. Transfer pipe; 40. Longitudinal beam; 50. Cross beam; 60. Partition beam; 70. First liquid inlet connector; 80. Second liquid inlet connector; 90. First liquid outlet connector; 101. Second liquid outlet connector; 102. Insert;

[0046] 11. Heat exchange channel; 111. First heat exchange channel; 1111. First heat exchange liquid inlet; 1112. First heat exchange liquid outlet; 112. Second heat exchange channel; 1121. Second heat exchange liquid inlet; 1122. Second heat exchange liquid outlet; 1113. First turning section; 1114. Second turning section; 12. First end surface; 13. Second end surface; 14. Heat exchange cavity; 141. First heat exchange cavity; 142. Second heat exchange cavity; 15. First rib; 16. Second rib; 17. First step; 18. Partition;

[0047] 21. Manifold channel; 211. First manifold channel; 2111. First manifold inlet; 2112. First manifold outlet; 212. Second manifold channel; 2121. Second manifold inlet; 2122. Second manifold outlet; 22. Manifold inlet; 23. Manifold cavity; 231. First manifold cavity; 232. Second manifold cavity; 24. Second step;

[0048] 31. First transfer tube; 32. Second transfer tube;

[0049] 41. First longitudinal beam; 42. Second longitudinal beam;

[0050] 51. First beam; 52. Second beam; 53. Limit space; 531. Sub-limit space;

[0051] 210, first battery module; 220, second battery module;

[0052] 310, main liquid inlet pipe; 320, branch liquid inlet pipe;

[0053] 410, liquid outlet main pipe; 420, liquid outlet branch pipe;

[0054] X, length direction; Y, width direction; Z, thickness direction. DETAILED DESCRIPTION

[0055] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0058] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0059] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0061] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0062] Taking the application of batteries as power sources in the electric heavy-duty truck industry as an example, in order to quickly adapt to more heavy-duty truck models, the current battery systems in the heavy-duty truck industry generally use several batteries connected in series and parallel. These batteries are arranged on the battery rack of the heavy-duty truck, and generally there are two batteries arranged on the same layer, and these two batteries are arranged back to back.

[0063] There is a phenomenon of insufficient space utilization when two batteries are placed back to back. Specifically, in order to ensure the assembly gap, a certain distance is left between the two back-to-back batteries. This distance is generally controlled at 50 to 80 mm. If this distance is reasonably utilized, the energy density of the entire battery system can be improved.

[0064] However, the external wiring and piping for battery racks and battery connections are already in use. Designing a new battery would inevitably require redesigning these external wiring and piping, which would increase user costs. Industry technicians need to consider how to maximize compatibility with existing external wiring and piping designs while improving space utilization and energy density.

[0065] It can be understood that the back-to-back arrangement of the two batteries specifically means that the batteries have a front and a back, with the backs of the two batteries close together and the fronts of the two batteries separated. The front of the battery refers to the surface where the electrical control panel and piping are located, and the back of the battery refers to the surface facing away from the front. The electrical control panel refers to the panel used to control the electrical components within the battery. The piping refers to the pipes used to circulate heat exchange medium into and out of the battery to increase or decrease the temperature of the battery. The wiring refers to the wires connecting the electrical control panel to the electrical components.

[0066] See also Figures 1 to 8 To alleviate the above-mentioned problems, the present application provides a battery box 100, which includes a base plate 10 and a current collecting plate 20. The base plate 10 has two independent heat exchange channels 11 through which heat exchange medium can flow. The two heat exchange channels 11 are arranged in sequence along the length direction X of the base plate 10 and extend in a circuitous manner. The liquid inlets of the two heat exchange channels 11 are arranged at opposite ends of the base plate 10 along the length direction X of the base plate 10, and are arranged at the same end of the base plate 10 along the width direction Y of the base plate 10. The liquid outlets of the two heat exchange channels 11 are arranged along the width direction Y of the base plate 10 on the end surface of the base plate 10 away from the liquid inlets of the heat exchange channels 11, and are close to each other. The collecting plate 20 is arranged on one side of the base plate 10 along the width direction Y of the base plate 10 and is arranged towards the liquid outlet of the heat exchange channel 11. The collecting plate 20 has two independent collecting channels 21. The collecting channels 21 correspond to the heat exchange channels 11 one by one, and the liquid inlets of the collecting channels 21 are aligned with and connected to the liquid outlets of the corresponding heat exchange channels 11. The liquid outlets of the collecting channels 21 and the liquid inlets of the heat exchange channels 11 corresponding to the collecting channels 21 are respectively arranged at the same ends of the collecting plate 20 and the base plate 10 along the length direction X of the base plate 10.

[0067] Both the heat exchange channel 11 and the collecting channel 21 are used to circulate a heat exchange medium, which can be water, alcohol, or other liquid medium. The two heat exchange channels 11 are independently provided, meaning that the heat exchange media within the two heat exchange channels 11 do not form convection currents and do not interfere with each other. Similarly, the two collecting channels 21 are independently provided, meaning that the heat exchange media within the two collecting channels 21 do not form convection currents and do not interfere with each other.

[0068] The two heat exchange channels 11 are independent of each other because the base plate 10 has a partition 18 at a central position along its longitudinal direction X, separating the two heat exchange channels 11. Using the partition 18 to separate the two heat exchange channels 11, which extend in a circuitous manner along the longitudinal direction X of the base plate 10, improves the strength of the base plate 10, simplifies the processing of the heat exchange channels 11, and facilitates the processing and shaping of the heat exchange channels 11.

[0069] For ease of explanation, the following embodiments are described using the two heat exchange channels 11 as being named the first heat exchange channel 111 and the second heat exchange channel 112, and the two manifold channels 21 as being named the first manifold channel 211 and the second manifold channel 212. The liquid inlet of the first heat exchange channel 111 is the first heat exchange liquid inlet 1111, the liquid outlet of the first heat exchange channel 111 is the first heat exchange liquid outlet 1112, the liquid inlet of the second heat exchange channel 112 is the second heat exchange liquid inlet 1121, and the liquid outlet of the second heat exchange channel 112 is the second heat exchange liquid outlet 1122.

[0070] The central axis of the bottom plate 10 extending along its width direction Y is defined as a reference line (eg Figure 8 As shown in FIG. 1 , in order to reduce the design difficulty, the first heat exchange channel 111 and the second heat exchange channel 112 are arranged symmetrically along the reference line, and the first collecting channel 211 and the second collecting channel 212 are also arranged symmetrically along the reference line. Figure 5 and Figure 8 For example, in this design, the first heat exchange channel 111 and the first collecting channel 211 are both located on the left side of the reference line, and the second heat exchange channel 112 and the second collecting channel 212 are both located on the right side of the reference line.

[0071] The first heat exchange liquid inlet 1111 and the second heat exchange liquid inlet 1121 are arranged away from the reference line, and the first heat exchange liquid outlet 1112 and the second heat exchange liquid outlet 1122 are arranged close to the reference line.

[0072] In the length direction X of the base plate 10, when the two heat exchange channels 11 are arranged in sequence and extend in a circuitous manner, taking the first heat exchange channel 111 and the second heat exchange channel 112 both including alternating straight sections, turning sections, straight sections, turning sections... as an example, the straight sections extend along the width direction Y of the base plate 10, and the adjacent straight sections are connected by the turning section, and the flow directions of the heat exchange medium between the adjacent straight sections are opposite.

[0073] Specifically, the first heat exchange channel 111 and the second heat exchange channel 112 can both be “S”-shaped channels, “Z”-shaped channels, etc.

[0074] The first heat exchange liquid inlet 1111 and the second heat exchange liquid inlet 1121 are arranged at opposite ends of the bottom plate 10 along the length direction X of the bottom plate 10, and are arranged at the same end of the bottom plate 10 along the width direction Y of the bottom plate 10. The first heat exchange liquid outlet 1112 and the second heat exchange liquid outlet 1122 are arranged on the end surface of the bottom plate 10 away from the first heat exchange liquid inlet 1111 and the second heat exchange liquid inlet 1121 along the width direction Y of the bottom plate 10, and are close to each other. This design can increase the distance between the liquid inlet and the liquid outlet in the same heat exchange channel 11 in the length direction X of the bottom plate 10, so as to extend the flow path of the heat exchange medium in the bottom plate 10 and improve the heat exchange effect.

[0075] The first collecting channel 211 corresponds to the first heat exchange channel 111, and the first collecting channel inlet 2111 is aligned with and connected to the first heat exchange outlet 1112. The second collecting channel 212 corresponds to the second heat exchange channel 112, and the second collecting channel inlet 2121 is aligned with and connected to the second heat exchange outlet 1122. The first collecting channel 211 receives the heat exchange medium output from the first heat exchange channel 111 after heat exchange and circulates the heat exchange medium outside the battery box 100. The second collecting channel 212 receives the heat exchange medium output from the second heat exchange channel 112 after heat exchange and circulates the heat exchange medium outside the battery box 100, thereby achieving circulation of the heat exchange medium and improving the heat exchange effect.

[0076] Specific as Figure 5 and Figure 8 As shown, the heat exchange medium in the first heat exchange channel 111 flows in a circuitous manner alternately along the directions indicated by arrows b and c, and finally flows into the first manifold channel 211 along the direction indicated by arrow d, and is discharged in the first manifold channel 211 along the direction indicated by arrow e. The heat exchange medium in the second heat exchange channel 112 flows in a circuitous manner alternately along the directions indicated by arrows g and h, and finally flows into the second manifold channel 212 along the direction indicated by arrow j, and is discharged in the second manifold channel 212 along the direction indicated by arrow k.

[0077] The liquid outlet of the collecting channel 21 and the liquid inlet of the heat exchange channel 11 corresponding to the collecting channel 21 are respectively arranged at the same end of the collecting plate 20 and the bottom plate 10 along the length direction X of the bottom plate 10, that is, the first collecting liquid outlet 2112 and the first heat exchange liquid inlet 1111 are located at the same end, the second collecting liquid outlet 2122 and the second heat exchange liquid inlet 1121 are located at the same end, and the first collecting liquid outlet 2112 and the second collecting liquid outlet 2122 are located at opposite ends of the collecting plate 20. Figure 5For example, the first collecting outlet 2112 is located at the left end of the collecting plate 20, the first heat exchange inlet 1111 is located at the left end of the bottom plate 10, the second collecting outlet 2122 is located at the right end of the collecting plate 20, and the second heat exchange inlet 1121 is located at the right end of the bottom plate 10.

[0078] In this embodiment, the heat exchange medium output from the first heat exchange channel 111 and the heat exchange medium output from the second channel both enter the first and second collecting channels 211 and 212, respectively, from the center of the collecting plate 20. They then flow through the first and second collecting channels 211 and 212, respectively, before being output from opposite ends of the collecting plate 20. This design can extend the flow path and duration of the heat exchange medium within the first and second collecting channels 211 and 212, resulting in a better heat exchange effect.

[0079] In the present application, the first heat exchange inlet 1111 and the first collecting outlet 2112 are located at the same locations as the inlet and outlet of one battery 1000 in a conventional back-to-back arrangement, respectively. The second heat exchange inlet 1121 and the second collecting outlet 2122 are located at the same locations as the inlet and outlet of another battery 1000 in a conventional back-to-back arrangement, respectively. In this case, the battery case 100 of the present application can share the external piping design of two conventional back-to-back batteries 1000, reducing the difficulty of piping redesign and maintaining user costs.

[0080] In addition, when the battery box 100 in the present application is applied to the battery 1000, two battery modules 200 are installed in the battery box 100, and the two battery modules 200 are defined as a first battery module 200 and a second battery module 200, respectively. The first battery module 200 and the second battery module 200 are arranged on the base plate 10 and the collecting plate 20, and the first battery module 200 corresponds to the first heat exchange channel 111 in the thickness direction Z of the base plate 10, and the second battery module 200 corresponds to the second heat exchange channel 112 in the thickness direction Z of the base plate 10. In this way, the heat exchange medium flowing in the first heat exchange channel 111 performs heat exchange with the first battery module 200 at the bottom of the first battery module 200, and the heat exchange medium flowing in the second heat exchange channel 112 performs heat exchange with the second battery module 200 at the bottom of the second battery module 200.

[0081] The first battery module 200 and the second battery module 200 are arranged side by side in the same battery box 100. Compared with the conventional method in which the first battery module 200 and the second battery module 200 are arranged side by side in two different battery boxes 100, the spacing between the first battery module 200 and the second battery module 200 can be designed to be smaller. This saves space and improves space utilization while also meeting energy storage requirements and increasing energy density.

[0082] In addition, when the battery box 100 in the present application is used in a battery 1000, electrical control panels can also be designed on the two end faces of the battery box 100 in the present application that are relatively arranged along the length direction X of the bottom plate 10, and the electrical control panels on the two end faces respectively control the first battery module 200 and the second battery module 200 in the battery box 100. Each electrical control panel is used to control the first battery module 200 or the second battery module 200 close to itself. In this case, the first battery module 200 or the second battery module 200 are independently controlled from each other and each has its own electrical control panel. The electrical functions are consistent with those in the back-to-back mode of the original battery 1000, ensuring that the circuits outside the battery box 100 in the present application can be used in conjunction with the traditional solution of two batteries 1000 connected back-to-back, without the need for new design and improvement.

[0083] In summary, when the battery box 100 of the present application is used in a battery 1000, the traditional external circuit and pipeline design can be shared, and the space utilization and energy density can be improved.

[0084] Please refer to Figures 8 to 10 , Figure 12 and Figure 14 In some embodiments, the end surface of the base plate 10 where the liquid outlet of the heat exchange channel 11 is located is defined as the first end surface 12, and the surface of the base plate 10 facing away from the first end surface 12 is defined as the second end surface 13. The base plate 10 includes two heat exchange cavities 14 arranged along the length direction X of the base plate 10. Each heat exchange cavity 14 corresponds to the heat exchange channel 11 and extends through both the first end surface 12 and the second end surface 13. First ribs 15 and second ribs 16 are formed within the heat exchange cavities 14. The first and second ribs 15, 16 are arranged alternately and spaced apart along the length direction X of the base plate 10 and define the heat exchange channel 11 within the heat exchange cavity 14. The end surface of the first rib 15 facing the first end surface 12 is recessed relative to the first end surface 12 and defines, together with the first end surface 12, a first turning section 1113 of the heat exchange channel 11. The end surface of the second rib 16 facing the second end surface 13 is retracted relative to the second end surface 13 , and defines together with the second end surface 13 a second turning section 1114 of the heat exchange channel 11 .

[0085] Among them, the two heat exchange cavities 14 are the first heat exchange cavity 141 and the second heat exchange cavity 142, the first ribs 15 and the second ribs 16 are alternately arranged in the first heat exchange cavity 141 to form a first heat exchange channel 111, and the first ribs 15 and the second ribs 16 are alternately arranged in the second heat exchange cavity 142 to form a second heat exchange channel 112.

[0086] The end surface of the first rib 15 facing the first end surface 12 is retracted relative to the first end surface 12 and can be formed by milling the first rib 15. The end surface of the second rib 16 facing the second end surface 13 is retracted relative to the second end surface 13 and can be formed by milling the second rib 16.

[0087] The arrangement of the first heat exchange cavity 141, the second heat exchange cavity 142, the first rib 15, and the second rib 16 forms a first turning section 1113 and a second turning section 1114, thereby allowing the first heat exchange channel 111 and the second heat exchange channel 112 to extend in a circuitous manner. The heat exchange medium continuously flows in the first heat exchange channel 111 and the second heat exchange channel 112 in a circuitous manner, extending the flow path and flow time of the heat exchange medium, thereby improving the heat exchange effect.

[0088] Specific as Figure 5 As shown, the direction in which the heat exchange medium flows in the first turning section 1113 in the first heat exchange channel 111 is indicated by arrow r.

[0089] Furthermore, in some embodiments, the collector plate 20 blocks the portion of the opening of the heat exchange cavity 14 located on the first end surface 12 and communicating with the first turning section 1113, thereby forming a sealed first turning section 1113. This prevents the heat exchange medium in the first heat exchange channel 111 and the second heat exchange channel 112 from leaking through the first turning section 1113, thereby improving the reliability of the heat exchange medium flow. Furthermore, using the external collector plate 20 to simultaneously block the openings of the first heat exchange cavity 141 and the second heat exchange cavity 142 located on the first end surface 12 further facilitates ease of operation.

[0090] The surface of the first rib 15 facing the second end face 13 is flush with the second end face 13, and the surface of the second rib 16 facing the first end face 12 is flush with the first end face 12. During actual assembly, the collector plate 20 cooperates with all second ribs 16 within the first heat exchange cavity 141 and is capable of blocking the portion of the opening of the first heat exchange cavity 141 located at the first end face 12. The remaining portion of the opening of the first heat exchange cavity 141 located at the first end face 12 forms the first heat exchange liquid outlet 1112. The collector plate 20 cooperates with all second ribs 16 within the second heat exchange cavity 142 and is capable of blocking the portion of the opening of the second heat exchange cavity 142 located at the first end face 12. The remaining portion of the opening of the second heat exchange cavity 142 located at the first end face 12 forms the second heat exchange liquid outlet 1122. The longitudinal beam 40 of the battery box 100 cooperates with all first ribs 15 within the first heat exchange cavity 141 and is capable of sealing the opening of the first heat exchange cavity 141 at the second end surface 13, thereby forming a sealed second turning section 1114 within the first heat exchange cavity 141. The longitudinal beam 40 of the battery box 100 cooperates with all first ribs 15 within the second heat exchange cavity 142 and is capable of sealing the opening of the second heat exchange cavity 142 at the second end surface 13, thereby forming a sealed second turning section 1114 within the second heat exchange cavity 142. Specifically, the longitudinal beam 40 is described in detail below.

[0091] See also Figure 5 、 Figure 12 and Figure 13 In some embodiments, the current collecting plate 20 has a collecting cavity 23 therein, and a collecting inlet 22 is formed on the surface of the current collecting plate 20 facing the liquid outlet of the heat exchange channel 11. The battery box 100 also includes an insert 102, which is inserted into the collecting cavity 23 via the collecting inlet 22, and separates the collecting inlet 22 into two independent first collecting inlet 2111 and second collecting inlet 2121, and separates the collecting cavity 23 into two independent first collecting cavities 231 and second collecting cavities 232. The current collecting plate 20 has a first collecting outlet 2112 and a second collecting outlet 2122, respectively, at opposite ends along the length direction X of the bottom plate 10.

[0092] The first manifold inlet 2111, the first manifold cavity 231, and the first manifold outlet 2112 are sequentially connected to form a heat exchange channel 11, and the second manifold inlet 2121, the second manifold cavity 232, and the second manifold outlet 2122 are sequentially connected to form another heat exchange channel 11. Specifically, the first manifold inlet 2111, the first manifold cavity 231, and the first manifold outlet 2112 are sequentially connected to form the first heat exchange channel 111, and the second manifold inlet 2121, the second manifold cavity 232, and the second manifold outlet 2122 are sequentially connected to form the second heat exchange channel 112.

[0093] The collecting plate 20 can be integrally extruded to form an internal collecting cavity 23. In addition, the middle portion of the collecting plate 20 parallel to the length direction X of the bottom plate 10 is milled off to form a collecting liquid inlet 22.

[0094] In order to avoid mutual interference between the heat exchange media in the first collecting channel 211 and the second collecting channel 212, after the insert 102 is inserted into the collecting liquid inlet 22 and the collecting cavity 23, it is necessary to seal the wall edge of the collecting liquid inlet 22 and the cavity wall of the collecting cavity 23 by welding, gluing, etc., so that the first collecting liquid inlet 2111 and the second collecting liquid inlet 2121, as well as the first collecting cavity 231 and the second collecting cavity 232 can be completely separated.

[0095] The insert 102 is embedded in the collecting plate 20 to separate and form the first collecting channel 211 and the second collecting channel 212 , which is simple and easy to operate and facilitates the formation of the first collecting channel 211 and the second collecting channel 212 .

[0096] See also Figure 5 、 Figure 6 、 Figure 9 、 Figure 11 and Figure 13 In some embodiments, the battery box 100 further includes two transfer tubes 30, which correspond one-to-one to the two heat exchange channels 11 and the two collecting channels 21. The transfer tubes 30 are connected between the liquid outlets of the corresponding heat exchange channels 11 and the liquid inlets of the corresponding collecting channels 21, and the transfer tubes 30 are sealed to the bottom plate 10 and the collecting plate 20.

[0097] The two transfer pipes 30 are defined as a first transfer pipe 31 and a second transfer pipe 32 . The first transfer pipe 31 is connected between the first heat exchange outlet 1112 and the first collecting inlet 2111 . The second transfer pipe 32 is connected between the second heat exchange outlet 1122 and the second collecting inlet 2121 .

[0098] The first transfer tube 31 ensures alignment between the first heat exchange outlet 1112 and the first manifold inlet 2111, while the second transfer tube 32 ensures alignment between the second heat exchange outlet 1122 and the second manifold inlet 2121. This allows the heat exchange medium output from the first heat exchange channel 111 to be effectively fed into the first manifold channel 211, and the heat exchange medium output from the second heat exchange channel 112 to be effectively fed into the second manifold channel 212, thereby improving the reliability of the heat exchange medium circulation. Furthermore, the transfer tube 30 is sealed with the base plate 10 and the manifold plate 20 to prevent leakage of the heat exchange medium.

[0099] Specific as Figure 5As shown, the direction in which the heat exchange medium flows through the first transfer tube 31 to the first collecting channel 211 is indicated by arrow m, and the direction in which the heat exchange medium flows through the second transfer tube 32 to the second collecting channel 212 is indicated by arrow n.

[0100] See also Figure 6 and Figure 13 Furthermore, in some embodiments, a first step 17 is provided at the liquid outlet of the heat exchange channel 11, and the second step 24 is provided at the liquid inlet of the collecting channel 21, and the second step 24 is provided at the liquid inlet of the collecting channel 21. The opposite ends of the transfer tube 30 are respectively embedded in the first step 17 and the second step 24.

[0101] It can be understood that the first heat exchange outlet 1112 and the second heat exchange outlet 1122 are both provided with a first step 17, and the first collecting inlet 2111 and the second collecting inlet 2121 are both provided with a second step 24, and the opposite ends of the first transfer tube 31 are respectively plugged into the first step 17 of the first heat exchange outlet 1112 and the second step 24 of the first collecting inlet 2111, and the opposite ends of the second transfer tube 32 are respectively plugged into the first step 17 of the second heat exchange outlet 1122 and the second step 24 of the second collecting inlet 2121, so that the first heat exchange outlet 1112 can be precisely aligned and connected with the first collecting inlet 2111 through the first transfer tube 31, and the second heat exchange outlet 1122 can be precisely aligned and connected with the second collecting inlet 2121 through the second transfer tube 32.

[0102] During actual assembly, the outer walls of the first and second adapter tubes 31 and 32 are coated with glue and then embedded into the first and second steps 17 and 24, ensuring a good seal between the first and second adapter tubes 31 and 32 and the first and second steps 17 and 24. The connection between the base plate 10 and the current collecting plate 20 is then friction welded to form a single unit.

[0103] See also Figures 2 to 4 In some embodiments, the battery box 100 further includes two longitudinal beams 40 and two transverse beams 50. The longitudinal beams 40 are disposed on opposite sides of the bottom plate 10 and the current collecting plate 20 along the width direction Y of the bottom plate 10. The transverse beams 50 are disposed on opposite ends of the bottom plate 10 along the length direction X of the bottom plate 10, and the transverse beams 50 are connected between the longitudinal beams 40. The two longitudinal beams 40, the two transverse beams 50, the bottom plate 10, and the current collecting plate 20 collectively define a confining space 53 that limits the battery modules 200.

[0104] The two longitudinal beams 40 are defined as a first longitudinal beam 41 and a second longitudinal beam 42, and the two transverse beams 50 are defined as a first transverse beam 51 and a second transverse beam 52. The first longitudinal beam 41, the second longitudinal beam 42, the first transverse beam 51, the second transverse beam 52, the bottom plate 10, and the current collecting plate 20 collectively define a confined space 53. The first battery module 200 and the second battery module 200 are both disposed within the confined space 53. The first longitudinal beam 41, the second longitudinal beam 42, the first transverse beam 51, the second transverse beam 52, the bottom plate 10, and the current collecting plate 20 can position and confine the first battery module 200 and the second battery module 200, facilitating subsequent installation and fixation of the first battery module 200 and the second battery module 200.

[0105] It is worth mentioning that in the present application, the first longitudinal beam 41 cooperates with all the first ribs 15 in the first heat exchange cavity 141 and can block the opening of the first heat exchange cavity 141 located at the second end face 13, and the first longitudinal beam 41 cooperates with all the first ribs 15 in the second heat exchange cavity 142 and can block the opening of the second heat exchange cavity 142 located at the second end face 13.

[0106] In some embodiments, the battery box 100 also includes a partition beam 60, which is located in the limiting space 53. The partition beam 60 extends along the width direction Y of the base plate 10 and divides the limiting space 53 into two sub-limiting spaces 531 that limit the battery modules 200 one by one.

[0107] The two sub-limiting spaces 531 are defined as the first sub-limiting space 531 and the second sub-limiting space 531, respectively. The first battery module 200 is limited in the first sub-limiting space 531, and the opposite ends of the first battery module 200 are respectively detachably connected to the first cross beam 51 and the partition beam 60. The second battery module 200 is limited in the second sub-limiting space 531, and the opposite ends of the second battery module 200 are respectively detachably connected to the second cross beam 52 and the partition beam 60.

[0108] As an example, the first battery module 200 is connected to the first crossbeam 51 and the partition beam 60 by screws, and the second battery module 200 is connected to the second crossbeam 52 and the partition beam 60 by screws.

[0109] By providing the partition beam 60 , the partition beam 60 cooperates with the first cross beam 51 and the second cross beam 52 to facilitate the fixation of the first battery module 200 and the second battery module 200 .

[0110] In some embodiments, the battery box 100 also includes a cover, which defines a space for accommodating the battery module 200 together with the first crossbeam 51, the second crossbeam 52, the first longitudinal beam 41, the second longitudinal beam 42, the bottom plate 10 and the current collecting plate 20 to isolate the battery module 200 from external water vapor.

[0111] See also Figure 1and Figure 2 The present application also provides a battery 1000, which includes a liquid inlet pipe assembly 300, a liquid outlet pipe assembly 400, two battery modules 200, and a battery box 100 as described in any of the above embodiments. The liquid inlet pipe assembly 300 includes a main liquid inlet pipe 310 and a branch liquid inlet pipe 320. The main liquid inlet pipe 310 is connected to the branch liquid inlet pipe 320, and the opposite ends of the branch liquid inlet pipe 320 are respectively connected to the two liquid inlets of the two heat exchange channels 11. The liquid outlet pipe assembly 400 includes a main liquid outlet pipe 410 and a branch liquid outlet pipe 420. The main liquid outlet pipe 410 is connected to the branch liquid outlet pipe 420, and the opposite ends of the branch liquid outlet pipe 420 are respectively connected to the two liquid outlets of the two collecting channels 21. The two battery modules 200 are disposed on the bottom plate 10 and the current collecting plate 20 and arranged along the length direction X of the bottom plate 10 . The two battery modules 200 exchange heat through the heat exchange medium in the two heat exchange channels 11 .

[0112] In this way, the heat exchange medium input by the liquid inlet main pipe 310 is distributed to the first heat exchange channel 111 and the second heat exchange channel 112 through the liquid inlet branch pipe 320, and then output to the liquid outlet branch pipe 420 through the first collecting channel 211 and the second collecting channel 212 respectively, and is output after merging in the liquid outlet main pipe 410.

[0113] Specific as Figure 1 As shown, the heat exchange medium in the liquid inlet branch pipe 320 flows into the first heat exchange channel 111 along the direction indicated by arrow a. Thereafter, the heat exchange medium alternately flows in the directions indicated by arrows b and c within the first heat exchange channel 111, and finally flows into the first header channel 211 along the direction indicated by arrow d. It is then output to the liquid outlet branch pipe along the direction indicated by arrow e within the first header channel 211. The heat exchange medium in the liquid inlet branch pipe 320 flows into the second heat exchange channel 112 along the direction indicated by arrow f. Thereafter, the heat exchange medium alternately flows in the directions indicated by arrows g and h within the second heat exchange channel 112, and finally flows into the second header channel 212 along the direction indicated by arrow j. It is then output to the liquid outlet branch pipe along the direction indicated by arrow k within the second header channel 212.

[0114] The liquid inlet pipe assembly 300 and the liquid outlet pipe assembly 400 are constructed together to form the external pipeline when the traditional batteries 1000 are arranged back to back.

[0115] The battery 1000 in this application has the effects brought by any of the above embodiments, so it will not be described again here.

[0116] To facilitate the connection of the base plate 10 and the collecting plate 20 with the liquid inlet pipe assembly 300 and the liquid outlet pipe assembly 400, the battery box 100 also includes a first liquid inlet joint 70, a second liquid inlet joint 80, a first liquid outlet joint 90 and a second liquid outlet joint 101. The first liquid inlet joint 70 is installed at the first heat exchange inlet 1111 and is connected to one end of the liquid inlet branch pipe 320 and the first heat exchange channel 111. The first liquid outlet joint 90 is installed at the first collecting outlet 2112 and is connected to one end of the liquid outlet branch pipe 420 and the first collecting channel 211. The second liquid inlet joint 80 is installed at the second heat exchange inlet 1121 and is connected to the other end of the liquid inlet branch pipe 320 and the second heat exchange channel 112. The second liquid outlet joint 101 is installed at the second collecting outlet 2122 and is connected to the other end of the liquid outlet branch pipe 420 and the second collecting channel 212.

[0117] The present application also provides an electrical device, which includes the battery 1000 as described in any of the above embodiments, and the battery 1000 is used to power the electrical device. The electrical device in the present application has the effects described in any of the above embodiments, so it will not be repeated here.

[0118] The electrical devices may include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, etc. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0119] It should be understood that the technical solutions described in the embodiments of the present application are not limited to being applicable to the electrical devices described above.

[0120] In the above-mentioned battery box 100, battery 1000 and electrical device, the positions of the liquid inlet and liquid outlet of one heat exchange channel 11 are respectively the same as the positions of the liquid inlet and liquid outlet of one battery 1000 arranged back to back in the traditional way, and the positions of the liquid inlet and liquid outlet of another heat exchange channel 11 are respectively the same as the positions of the liquid inlet and liquid outlet of another battery 1000 arranged back to back in the traditional way. In this case, the battery box 100 in the present application can share the external pipeline design of the two batteries 1000 arranged back to back in the traditional way, reducing the difficulty of redesigning the pipeline and not increasing the user cost. In addition, when the battery box 100 in the present application is used in the battery 1000, the two battery modules 200 of the two batteries 1000 arranged back to back in the traditional way can be integrated in the battery box 100. In this way, while saving space and improving space utilization, it can also meet energy storage needs and improve energy density. In addition, when the battery box 100 in the present application is used in the battery 1000, an electrical control panel can also be designed on the two end faces of the battery box 100 in the present application that are relatively arranged along the length direction X of the base plate 10, to ensure that the circuit outside the battery box 100 in the present application can be compatible with the traditional solution of two batteries 1000 connected back to back, without the need for new design and improvement.

[0121] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0122] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery box, characterized in that: The battery box includes: A base plate (10) having two heat exchange channels (11) therein which are independent of each other and capable of circulating a heat exchange medium, the two heat exchange channels (11) being arranged in sequence along the length direction of the base plate (10) and extending in a circuitous manner, and the liquid inlets of the two heat exchange channels (11) being arranged at opposite ends of the base plate (10) along the length direction of the base plate (10), and being arranged at the same end of the base plate (10) along the width direction (Y) of the base plate (10), and the liquid outlets of the two heat exchange channels (11) being arranged at the end surface of the base plate (10) away from the liquid inlets of the heat exchange channels (11) along the width direction (Y) of the base plate (10), and being close to each other; and A collecting plate (20) is arranged on one side of the bottom plate (10) along the width direction (Y) of the bottom plate (10) and is arranged toward the liquid outlet of the heat exchange channel (11). The collecting plate (20) has two independent collecting channels (21) therein. The collecting channels (21) correspond to the heat exchange channels (11) one by one, and the liquid inlets of the collecting channels (21) are aligned with and communicated with the liquid outlets of the corresponding heat exchange channels (11). The liquid outlets of the collecting channels (21) and the liquid inlets of the heat exchange channels (11) corresponding to the collecting channels (21) are respectively arranged at the same ends of the collecting plate (20) and the bottom plate (10) along the length direction of the bottom plate (10).

2. The battery box according to claim 1, characterized in that: The end surface of the bottom plate (10) where the liquid outlet of the heat exchange channel (11) is located is defined as a first end surface (12), and the surface of the bottom plate (10) facing away from the first end surface (12) is defined as a second end surface (13); the bottom plate (10) has two heat exchange cavities (14) arranged along the length direction of the bottom plate (10), the heat exchange cavities (14) corresponding to the heat exchange channels (11) one by one, and the heat exchange cavities (14) pass through the first end surface (12) and the second end surface (13); The heat exchange cavity (14) is constructed with a first rib (15) and a second rib (16), and the first rib (15) and the second rib (16) are alternately and spaced along the length direction of the bottom plate (10) and define the heat exchange channel (11) in the heat exchange cavity (14); the end face of the first rib (15) facing the first end face (12) is retracted relative to the first end face (12), and defines a first turning section (1113) of the heat exchange channel (11) with the first end face (12); the end face of the second rib (16) facing the second end face (13) is retracted relative to the second end face (13), and defines a second turning section (1114) of the heat exchange channel (11) with the second end face (13).

3. The battery box according to claim 2, characterized in that: The collecting plate (20) blocks a portion of the opening of the heat exchange cavity (14) located on the first end surface (12) and communicating with the first turning section (1113), thereby forming a sealed first turning section (1113).

4. The battery box according to claim 1, characterized in that: The collecting plate (20) has a collecting cavity (23) therein, and a collecting liquid inlet (22) is provided on the surface of the collecting plate (20) facing the liquid outlet of the heat exchange channel (11); The battery box further comprises an insert (102), wherein the insert (102) is embedded in the collecting cavity (23) via the collecting liquid inlet (22), and separates the collecting liquid inlet (22) into two mutually independent first collecting liquid inlets (2111) and second collecting liquid inlets (2121), and separates the collecting cavity (23) into two independent first collecting cavities (231) and second collecting cavities (232), and the collecting plate (20) is provided with a first collecting liquid outlet (2112) and a second collecting liquid outlet (2122) at two opposite ends arranged along the length direction of the bottom plate (10); The first collecting liquid inlet (2111), the first collecting cavity (231) and the first collecting liquid outlet (2112) are connected in sequence to form one heat exchange channel (11), and the second collecting liquid inlet (2121), the second collecting cavity (232) and the second collecting liquid outlet (2122) are connected in sequence to form another heat exchange channel (11).

5. The battery box according to claim 1, characterized in that: The battery box further comprises two transfer tubes (30), the two transfer tubes (30) corresponding one to the two heat exchange channels (11) and the two collecting channels (21), the transfer tubes (30) being connected between the liquid outlets of the corresponding heat exchange channels (11) and the liquid inlets of the corresponding collecting channels (21), and the transfer tubes (30) being sealedly connected to the bottom plate (10) and the collecting plate (20).

6. The battery box according to claim 5, characterized in that: A first step (17) is provided at the liquid outlet of the heat exchange channel (11), which is sunken relative to the liquid outlet of the heat exchange channel (11); a second step (24) is provided at the liquid inlet of the collecting channel (21), which is sunken relative to the liquid inlet of the collecting channel (21); and opposite ends of the transfer tube (30) are respectively embedded in the first step (17) and the second step (24).

7. The battery box according to claim 1, characterized in that: The battery box further comprises two longitudinal beams (40) and two transverse beams (50), wherein the two longitudinal beams (40) are arranged on opposite sides of the bottom plate (10) and the current collecting plate (20) along the width direction (Y) of the bottom plate (10), and the two transverse beams (50) are arranged on opposite ends of the bottom plate (10) along the length direction of the bottom plate (10), and the transverse beams (50) are connected between the two longitudinal beams (40); The two longitudinal beams (40), the two transverse beams (50), the bottom plate (10) and the current collecting plate (20) jointly define a limiting space (53) for forming a limiting battery module (200).

8. The battery box according to claim 7, characterized in that: The battery box further comprises a partition beam (60), the partition beam (60) being located in the limiting space (53), the partition beam (60) extending along the width direction (Y) of the bottom plate (10) and dividing the limiting space (53) into two sub-limiting spaces (531) for limiting the battery modules (200) in a one-to-one correspondence.

9. A battery, characterized in that: The battery comprises: The battery box according to any one of claims 1 to 8; and A liquid inlet pipe assembly (300) comprises a main liquid inlet pipe (310) and a branch liquid inlet pipe (320), wherein the main liquid inlet pipe (310) is in communication with the branch liquid inlet pipe (320), and opposite ends of the branch liquid inlet pipe (320) are respectively in communication with the two liquid inlets of the two heat exchange channels (11); The liquid outlet pipe assembly (400) comprises a main liquid outlet pipe (410) and a branch liquid outlet pipe (420), wherein the main liquid outlet pipe (410) is in communication with the branch liquid outlet pipe (420), and opposite ends of the branch liquid outlet pipe (420) are respectively in communication with the two liquid outlets of the two collecting channels (21); Two battery modules (200) are arranged on the base plate (10) and the current collecting plate (20) and arranged along the length direction of the base plate (10). The two battery modules (200) respectively exchange heat through the heat exchange medium in the two corresponding heat exchange channels (11).

10. An electrical device, characterized in that: The battery according to claim 9 is used to power the electrical device.

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