Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and the battery device comprises a box body assembly which comprises a plurality of wall parts, the wall parts are enclosed to form a containing cavity, and a first channel is formed in at least one wall part; the battery monomer group is arranged in the accommodating cavity; the heat exchange assembly comprises a first heat exchange part and a second heat exchange part, the first heat exchange part is arranged in the accommodating cavity, the second heat exchange part is arranged in the first channel, and the first heat exchange part and the second heat exchange part are used for exchanging heat for at least two different surfaces of the battery monomer group. The different surfaces of the battery monomer group are subjected to heat exchange through the first heat exchange part and the second heat exchange part, so that the heat exchange area of the battery monomer group can be increased, and the heat exchange efficiency is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery device and an electrical equipment. Background Art

[0002] With the development of new energy technologies, battery devices are increasingly widely used, and the market's performance requirements for battery devices are also getting higher and higher. Currently, the energy density of battery cells is getting higher and higher, and the requirements for heat exchange of battery cells are also getting higher and higher. Therefore, the current heat exchange effect of battery devices is not good, which is not conducive to improving the performance of battery devices. Summary of the Utility Model

[0003] Based on this, in view of the problem that the current heat exchange effect of battery devices is not good and is not conducive to improving the performance of battery devices, it is necessary to provide a battery device and an electrical equipment.

[0004] In a first aspect, the present application provides a battery device, including a box body assembly, a battery cell group, and a heat exchange assembly. The box body assembly includes a plurality of wall portions, and each wall portion encloses to form a receiving cavity, and a first channel is formed inside at least one wall portion; the battery cell group is disposed in the receiving cavity; the heat exchange assembly includes a first heat exchange member and a second heat exchange member. The first heat exchange member is disposed in the receiving cavity, and the second heat exchange member is disposed in the first channel. The first heat exchange member and the second heat exchange member are used for heat exchange on at least two different surfaces of the battery cell group.

[0005] By respectively performing heat exchange on the battery cell group through the first heat exchange member and the second heat exchange member, the heat exchange efficiency can be effectively improved. In addition, different heat exchange members correspond to different surfaces of the battery cell group. In this way, the heat exchange area of the battery cell group can be increased, thereby further improving the heat exchange efficiency.

[0006] In addition, the first channel formed inside the wall portion is a cavity formed by the wall portion through its own structure, which can be but is not limited to a cavity. In the current solution, a groove is opened on the inner wall of the box body, and the heat exchange member is accommodated and fixed through the groove. This method requires changing the self-plate structure of the box body and is only applicable to the box body structure of stamping sheet metal.

[0007] However, in the present application, by forming a first channel inside the wall portion and using the first channel to accommodate and fix the second heat exchange member, it can not only be applicable to both extrusion or stamping box body structures at the same time, but also does not require changing the self-structure of the box body, and can effectively improve the production beat.

[0008] In some embodiments, all the wall portions include a bottom wall and a plurality of side walls. Each side wall surrounds the bottom wall, and the first heat exchange member is disposed in the receiving cavity and located between the bottom wall and the battery cell group; a first channel is formed inside at least part of the side walls, and the second heat exchange member is disposed in the first channel.

[0009] With the above structure, the first heat exchange member and the second heat exchange member respectively exchange heat with the bottom surface and the side surface of the battery cell group, which can increase the heat exchange area of the battery cell group, thereby improving the heat exchange efficiency of the battery cell group.

[0010] In some embodiments, the box body assembly further includes end plates disposed in the accommodating cavity. The side walls having the first channels are disposed on opposite sides of the battery cell group along a first direction, and the end plates are disposed on opposite sides of the battery cell group along a second direction; wherein, a second channel is formed inside the end plates, and the heat exchange assembly further includes a third heat exchange member disposed in the second channel; the first direction intersects with the second direction and is parallel to the bottom wall. Thus, the end plates can not only limit the battery cell group, but also realize heat exchange with the battery cell group through the third heat exchange member inside them.

[0011] In some embodiments, all the wall parts include a bottom wall and a plurality of side walls. The side walls surround the bottom wall on all sides, and a first channel is formed inside the bottom wall and at least some of the side walls. The second heat exchange member includes a plurality of parts, and some of the second heat exchange members are disposed in the first channel of the bottom wall, and the rest of the second heat exchange members are disposed in the first channel of the side walls.

[0012] With the above structure, the first heat exchange member and the second heat exchange member respectively exchange heat with the bottom surface and the side surface of the battery cell group, which can increase the heat exchange area of the battery cell group, thereby improving the heat exchange efficiency of the battery cell group. In addition, heat exchange structures such as water-cooling plates can be eliminated, simplifying the overall structure of the battery device.

[0013] In some embodiments, all the wall parts include a bottom wall and a plurality of side walls. The side walls surround the bottom wall on all sides, and a first channel is formed inside the bottom wall; the box body assembly further includes end plates disposed in the accommodating cavity. The end plates are located between at least some of the side walls and the battery cell group, and are used to limit the battery cell group, and a second channel is formed inside the end plates; the second heat exchange member is disposed in the first channel, and the heat exchange assembly further includes a third heat exchange member disposed in the second channel.

[0014] With the above structure, the first heat exchange member, the second heat exchange member and the third heat exchange member can respectively exchange heat with different surfaces of the battery cell group, increasing the heat exchange area and improving the heat exchange efficiency.

[0015] In some embodiments, every two end plates form a group, and there are multiple groups of end plates. At least one battery cell group is disposed between each group of end plates; wherein, each end plate is detachably disposed on the bottom wall.

[0016] With the above structure, the position and quantity of the end plates can be adjusted more flexibly, so as to adjust the overall structure of the battery device according to actual usage requirements.

[0017] In some embodiments, the two end plates in each group are arranged at intervals in the first direction, multiple groups of end plates are arranged in the second direction intersecting the first direction, and the second channels of adjacent two end plates are communicated with each other; the third heat exchange component includes a heat exchange pipe, and the heat exchange pipe penetrates through the second channels in each of the end plates on the same side.

[0018] Through the above structure, the second channels of multiple end plates can be communicated to form an integral heat exchange structure, which is convenient for heat exchange on the surface of the battery cell group.

[0019] In some embodiments, the heat exchange pipe is configured as a flexible pipe. Thus, the flexible pipe is connected between the second channels of different end plates to achieve a smooth connection between the second channels of different end plates.

[0020] In some embodiments, the first heat exchange member includes a water-cooled plate.

[0021] In a second aspect, the present application further provides an electrical device including the battery device as described above.

[0022] For the above battery device and electrical device, by respectively performing heat exchange on different surfaces of the battery cell group through the first heat exchange member and the second heat exchange member, the heat exchange area of the battery cell group can be increased, and the heat exchange efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a battery device according to one or more embodiments.

[0024] Figure 2 is a schematic structural diagram of a battery device according to one or more embodiments.

[0025] Figure 3 is a three-dimensional structural diagram of a battery device according to one or more embodiments.

[0026] Figure 4 is a side view of a battery device according to one or more embodiments.

[0027] Figure 5 is a side view of a battery device according to one or more embodiments.

[0028] Figure 6 is a side view of a battery device according to one or more embodiments.

[0029] Figure 7 is Figure 6 a partial enlarged view of part A in

[0030] Explanation of the accompanying drawings: 100, battery device; 10, box assembly; 20, battery cell group; 30, first heat exchange member; 40, second heat exchange member; 50, third heat exchange member; 11, accommodating chamber; 12, bottom wall; 13, side wall; 14, end plate; 15, first channel; 16, second channel; 51, heat exchange pipe; a, first direction; b, second direction. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0037] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles and other fields. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing.

[0038] In the structure of a battery device, it generally includes a box body and a plurality of battery cells. Each battery cell is grouped and disposed in an accommodation cavity inside the box body, and the box body plays a good protective role for the battery cells.

[0039] During the cyclic use of the battery cells, it is necessary to control the battery cells to maintain within a relatively stable temperature range so that the battery cells can work more stably. For example, when the ambient temperature is too low, it is necessary to heat up the battery cells; and when heat is generated during the cycling of the battery cells, when the heat generated by the battery cells is too large, it is necessary to cool down the battery cells.

[0040] Based on this, it is necessary to provide a heat exchange structure in the battery device to facilitate timely heat exchange of the battery cells and keep the battery cells within a relatively stable temperature range.

[0041] However, due to the gradual increase in the energy density and other performances of current battery cells, the requirements of battery cells for the heat exchange structure are also getting higher and higher. Therefore, the heat exchange effect of the heat exchange structure in the current battery device cannot meet the heat exchange requirements of the battery cells, thus affecting the overall performance of the battery device.

[0042] Based on the above considerations, in order to solve the problem that the heat exchange effect of the current battery device is not good and is not conducive to improving the service performance of the battery device, one or more embodiments of the present application provide a battery device. By respectively performing heat exchange on different surfaces of the battery cell group through the first heat exchange member and the second heat exchange member, the heat exchange area of the battery cell group can be increased, and the heat exchange efficiency can be effectively improved.

[0043] It should be noted that the battery device (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a bus bar component.

[0044] In some embodiments, the battery cell assembly (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells. As an example, the battery cell assembly may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0045] In some embodiments, the battery device may be a battery pack (battery Pack), and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0046] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0047] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0048] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, an embodiment of the present application provides a battery device 100, including a box body assembly 10, a battery cell group 20, and a heat exchange assembly. The box body assembly 10 includes a plurality of wall portions, and the wall portions enclose to form a receiving cavity 11, and a first channel 15 is formed inside at least one wall portion. The battery cell group 20 is disposed in the receiving cavity 11. The heat exchange assembly includes a first heat exchange member 30 and a second heat exchange member 40. The first heat exchange member 30 is disposed in the receiving cavity 11, and the second heat exchange member 40 is disposed in the first channel 15. The first heat exchange member 30 and the second heat exchange member 40 are configured to perform heat exchange on at least two different surfaces of the battery cell group 20.

[0049] It should be noted that the box body assembly 10 refers to the structure in the battery device 100 for accommodating the battery cell group 20 and other functional components. The box body assembly 10 may include a plurality of wall portions, and the wall portions may jointly enclose to form a receiving cavity 11. Disposing the battery cell group 20 in the receiving cavity 11 can play a certain protective role for the battery cell group 20 through the box body assembly 10.

[0050] The battery cell group 20 may include a plurality of battery cells, and a plurality of the battery cells are arranged in a column along their own thickness directions, and multiple columns of battery cells are arranged in sequence along their own width directions. In this way, all the battery cells are arranged in an array in the receiving cavity 11.

[0051] The heat exchange assembly refers to a component that can perform heat exchange on the battery cell group 20 to keep the battery cell group 20 within a stable temperature range. Among them, the heat exchange assembly may be disposed in the receiving cavity 11 or in the wall portion of the box body assembly 10.

[0052] Specifically, when the first heat exchange member 30 and the second heat exchange member 40 are disposed at different positions of the box body assembly 10, different heat exchange areas are respectively formed in the receiving cavity 11, so that each heat exchange area can respectively correspond to at least two different surfaces of the battery cell group 20. For example, when the first heat exchange member 30 is disposed at the bottom of the box body assembly 10, the heat exchange area corresponding to the first heat exchange member 30 is formed between the bottom surface of the battery cell group 20 and the bottom wall of the receiving cavity 11. When the second heat exchange member 40 is disposed on the side surface of the box body assembly 10, the heat exchange area corresponding to the second heat exchange member 40 is formed between the side surface of the battery cell group 20 and the side wall of the receiving cavity 11.

[0053] Thus, by performing heat exchange on the battery cell group 20 through the first heat exchange member 30 and the second heat exchange member 40 respectively, the heat exchange efficiency can be effectively improved. In addition, different heat exchange members correspond to different surfaces of the battery cell group 20, so that the heat exchange area of the battery cell group 20 can be increased, thereby further improving the heat exchange efficiency.

[0054] In addition, it should be noted that the first channel 15 formed inside the wall portion is the cavity formed by the wall portion through its own structure, and it can be, but is not limited to, a cavity. In the current solution, a groove is opened on the inner wall of the box body, and the heat exchange element is accommodated and fixed through the groove. This method requires changing the structure of the box body's own plate, and is only applicable to the box body structure of stamping sheet metal.

[0055] However, in this application, by forming the first channel 15 inside the wall portion and using the first channel 15 to accommodate and fix the second heat exchange element 40, it can not only be applicable to both the extruded or stamped box body structures at the same time, but also does not require changing the structure of the box body itself, and can effectively improve the production rhythm.

[0056] In some embodiments, all the wall portions include a bottom wall 12 and side walls 13. The side walls 13 surround the bottom wall 12 on all sides. The first heat exchange element 30 is disposed in the accommodation cavity 11 and located between the bottom wall 12 and the battery cell group 20, and is used for heat exchange with the bottom surface of the battery cell. The first channel 15 is formed inside the side wall 13, and the second heat exchange element 40 is disposed in the first channel 15 and is used for heat exchange with the side surface of the battery cell group 20.

[0057] It should be noted that the battery cell group 20 is a whole structure formed by a plurality of battery cells arranged in sequence. Among them, the bottom surface of the battery cell group 20 is jointly formed by the bottom surfaces of all the battery cells, and the side surface of the battery cell group 20 is the side surface of the outermost row or column of battery cells.

[0058] Among them, the side surface of the battery cell further includes two large surfaces and two end surfaces. Among them, the two large surfaces are arranged in parallel, and the large surface is the surface with the largest area in the battery cell. The two end surfaces are also arranged in parallel, and the two large surfaces and the two end surfaces sequentially enclose the bottom surface of the battery cell on all sides.

[0059] Based on this, the side surface of the battery cell group 20 can be composed of the end surfaces of the outermost row or column of battery cells, or composed of the large surfaces of the outermost row or column of battery cells.

[0060] Furthermore, the first heat exchange element 30 and the second heat exchange element 40 are respectively disposed on two different wall portions of the box body assembly 10, so that the formed heat exchange areas are correspondingly arranged with different surfaces of the battery cell group 20. That is, the first heat exchange element 30 and the second heat exchange element 40 can be respectively disposed on the bottom surface or the side surface of the battery cell group 20, so as to perform heat exchange on the bottom surface or the side surface of the battery cell group 20 through different heat exchange areas respectively.

[0061] Through the above structure, the first heat exchange element 30 and the second heat exchange element 40 can respectively perform heat exchange on different surfaces of the battery cell group 20, improving the heat exchange efficiency of the battery cell group 20.

[0062] Specifically, all the wall parts include a bottom wall 12 and side walls 13, and may further include a top wall. The bottom wall 12, the side walls 13, and the top wall together enclose an accommodation cavity 11 of the box assembly 10. Among them, the side walls 13 are arranged around the periphery of the bottom wall 12. When the battery cell group 20 is arranged in the accommodation cavity 11, the bottom surface of the battery cell group 20 is supported on the bottom wall 12, and the side surface of the battery cell group 20 is arranged opposite to the side walls 13.

[0063] As a specific embodiment, the first heat exchange member 30 may be arranged in the accommodation cavity 11 and located between the bottom wall 12 and the bottom surface of the battery cell group 20. For example, the first heat exchange member 30 may be arranged as a water-cooled plate. The water-cooled plate is arranged between the bottom surface of the battery cell group 20 and the bottom wall 12 of the box assembly 10, and the bottom surface of the battery cell group 20 contacts the water-cooled plate for heat exchange.

[0064] Furthermore, a first channel 15 is opened inside at least part of the side walls 13. The first channel 15 may be arranged to penetrate along the extending direction of the corresponding side walls 13. The second heat exchange member 40 is arranged in the first channel 15. Among them, the second heat exchange member 40 may be a cooling pipe, and the cooling pipe is arranged to pass through the first channel 15. When the battery cell group 20 is arranged in the accommodation cavity 11, the side surface of the battery cell group 20 fits against the side walls 13. Thus, the cooling pipe in the first channel 15 can perform heat exchange on the side surface of the battery cell group 20.

[0065] Through the above structure, the first heat exchange member 30 and the second heat exchange member 40 respectively perform heat exchange on the bottom surface and the side surface of the battery cell group 20, which can increase the heat exchange area of the battery cell group 20, thereby improving the heat exchange efficiency of the battery cell group 20.

[0066] In some embodiments, the box assembly 10 further includes end plates 14 arranged in the accommodation cavity 11. The side walls 13 having the first channels 15 are arranged on opposite sides of the battery cell group 20 along the first direction a, and the end plates 14 are arranged on opposite sides of the battery cell group 20 along the second direction b. Among them, a second channel 16 is formed inside the end plates 14, and the heat exchange assembly further includes a third heat exchange member 50 arranged in the second channel 16. The first direction a and the second direction b intersect and are both parallel to the bottom wall 12. Thus, the end plates 14 can not only limit the battery cell group 20, but also realize heat exchange with the battery cell group 20 through the third heat exchange member 50 inside them.

[0067] In some embodiments, all the wall parts include a bottom wall 12 and a plurality of side walls 13. Each side wall 13 surrounds the bottom wall 12. A first channel 15 is formed inside the bottom wall 12 and at least part of the side walls 13. There are a plurality of second heat exchange members 40. Among them, part of the second heat exchange members 40 are arranged in the first channel 15 of the bottom wall 12, and the remaining part of the second heat exchange members 40 are arranged in the first channel 15 of the side walls 13.

[0068] Specifically, the bottom wall 12 and the side walls 13 can respectively define the first channel 15. The second heat exchange members 40 can all be arranged as cooling pipes, and the cooling pipes are respectively passed through the first channel 15 of the bottom wall 12 and the first channel 15 of the side walls 13.

[0069] When the battery cell group 20 is arranged in the accommodation cavity 11, the bottom surface of the battery cell group 20 is supported on the bottom wall 12, so that the bottom surface of the battery cell group 20 is heat-exchanged through the cooling pipe inside the bottom wall 12. At the same time, the side surface of the battery cell group 20 is attached to the side wall 13, so that the side surface of the battery cell group 20 is heat-exchanged through the cooling pipe inside the side wall 13.

[0070] With the above structure, the first heat exchange member 30 and the second heat exchange member 40 respectively heat-exchange the bottom surface and the side surface of the battery cell group 20, which can increase the heat-exchange area of the battery cell group 20, thereby improving the heat-exchange efficiency of the battery cell group 20. In addition, heat-exchange structures such as a water-cooling plate can also be eliminated, simplifying the overall structure of the battery device 100.

[0071] In some embodiments, all the wall parts include a bottom wall 12 and a plurality of side walls 13. Each side wall 13 surrounds the bottom wall 12. A first channel 15 is formed inside the bottom wall 12; the box body assembly 10 further includes an end plate 14 arranged in the accommodation cavity 11. The end plate 14 is located between at least part of the side walls 13 and the battery cell group 20 for limiting the battery cell group 20, and a second channel 16 is formed inside the end plate 14. The second heat exchange member 40 is arranged in the first channel 15, and the heat exchange assembly further includes a third heat exchange member 50 arranged in the second channel 16.

[0072] Specifically, when the main body part of the box body assembly 10 is set as a stamping box body, that is, the box body is an integrally formed structure. At this time, an end plate 14 can be arranged in the accommodation cavity 11, and the end plate 14 can limit the battery cell group 20 along the width direction or the thickness direction of the battery cell, so that the battery cell group 20 is arranged in the accommodation cavity 11 more stably.

[0073] A second channel 16 can be provided inside the end plate 14, and a third heat exchanger 50 can be disposed within the second channel 16. For example, the third heat exchanger 50 can be configured as a cooling pipe, and the cooling pipe is passed through the second channel 16. Thus, the side surface of the battery cell group 20 is in contact with the end plate 14, and heat exchange can be performed on the side surface of the battery cell group 20 through the cooling pipe within the second channel 16.

[0074] Meanwhile, the first heat exchanger 30 can be configured as a water-cooled plate, and the water-cooled plate is disposed between the bottom surface of the battery cell group 20 and the bottom wall 12 of the box assembly 10, and heat exchange is performed by contact between the bottom surface of the battery cell group 20 and the water-cooled plate.

[0075] With the above structure, the first heat exchanger 30 and the second heat exchanger 40 can perform heat exchange on the bottom surface and the side surface of the battery cell group 20 respectively, improving the heat exchange efficiency. In addition, the second heat exchanger 40 is integrated on the end plate 14, enabling the end plate 14 to also play a heat exchange role while limiting the battery cell group 20.

[0076] In some embodiments, every two end plates 14 form a group, and there are multiple groups of end plates 14. At least one battery cell group 20 is provided between each group of end plates 14. Among them, each end plate 14 is detachably disposed on the bottom wall 12.

[0077] Specifically, two end plates 14 form a group, and the two end plates 14 can be spaced apart in a direction parallel to the bottom wall 12. At least one battery cell group 20 is disposed between the two end plates 14, and the outermost battery cells can abut against the corresponding end plates 14. In this way, the two end plates 14 can limit the battery cell group 20 located therein, and the second heat exchanger 40 inside the end plate 14 can also perform heat exchange on the side surface of the battery cell group 20.

[0078] Furthermore, the end plates 14 can be provided in multiple groups, and the multiple groups of end plates 14 are arranged in sequence. A battery cell group 20 can be provided between each group of end plates 14. Among them, the number of groups of end plates 14 can be adjusted according to the usage requirements of the battery device 100. That is, when the battery device 100 requires a large amount of power, the number of battery cells inside the battery device 100 is large, and the corresponding number of groups of end plates 14 required is also more.

[0079] In addition, each end plate 14 can be detachably disposed on the bottom wall 12 by bolts or other connection means. In this way, the position and number of the end plates 14 can be flexibly adjusted according to the actual usage situation.

[0080] With the above structure, the position and number of the end plates 14 can be adjusted more flexibly, so as to adjust the overall structure of the battery device 100 according to the actual usage requirements.

[0081] Please also refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 . In some embodiments, two end plates 14 in each group are spaced along the first direction a, and multiple groups of end plates 14 are arranged along the second direction b intersecting the first direction a, and the second channels 16 of two adjacent end plates 14 communicate with each other. The third heat exchanger 50 includes a heat exchange pipe 51, and the heat exchange pipe 51 passes through the second channels 16 in each of the end plates 14 on the same side.

[0082] Specifically, the first direction a can be set as the thickness direction of each battery cell in the accommodation cavity 11, and the second direction b can be set as the width direction of each battery cell in the accommodation cavity 11, that is, the first direction a and the second direction b are perpendicular to each other and both are parallel to the bottom wall 12 of the box body assembly 10. Of course, the first direction a and the second direction b can also be interchanged.

[0083] In the second direction b, the end faces of two adjacent end plates 14 are arranged in a mutually attached manner, so that the second channels 16 of two adjacent end plates 14 communicate with each other.

[0084] The third heat exchanger 50 includes a heat exchange pipe 51, and the heat exchange pipe 51 can sequentially pass through the second channels 16 in each of the end plates 14 on the same side, that is, the second channels 16 of each end plate 14 on the same side are connected into a whole through the heat exchange pipe 51, so as to facilitate heat exchange on the side surface of the battery cell group 20.

[0085] Among them, the heat exchange pipe 51 can be provided with one inlet and one outlet, or can be provided with multiple inlets and multiple outlets. A heat exchange medium is introduced into the heat exchange pipe 51 from the inlet, and the heat exchange medium is discharged from the outlet, so that one-way water inlet and outlet or multi-way water inlet and outlet can be realized.

[0086] Through the above structure, the second channels 16 of multiple end plates 14 can be communicated to form an integral heat exchange structure, which is convenient for heat exchange on the surface of the battery cell group 20.

[0087] Such as Figure 6 and Figure 7 shown, in some embodiments, the heat exchange pipe 51 is configured as a flexible pipe. Specifically, the heat exchange pipe 51 can be set as a flexible hose, and the hose can be connected between the second channels 16 of different end plates 14 to realize smooth connection between the second channels 16 of different end plates 14.

[0088] Based on the same concept as the above battery device 100, the present application also provides an electrical device including the battery device 100 as described above.

[0089] According to one or more embodiments, when the present application is specifically used, the first heat exchanger 30 is placed on the bottom wall 12 of the box body assembly 10, the end plate 14 is bolted to the bottom wall 12, and the battery cell group 20 is placed on the first heat exchanger 30, so that the first heat exchanger 30 contacts and exchanges heat with the bottom surface of the battery cell group 20. At the same time, the heat exchange pipe 51 is passed through the second channel 16 of the end plate 14, and the side surface of the battery cell group 20 is abutted against the corresponding end plate 14, so that the heat exchange pipe 51 exchanges heat with the side surface of the battery cell group 20.

[0090] Thus, the bottom surface and the side surface of the battery cell group 20 are respectively heat-exchanged by the first heat exchanger 30 and the heat exchange pipe 51, increasing the heat exchange area of the battery cell group 20 and improving the heat exchange efficiency.

[0091] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0092] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A battery device, characterized in that: include: The box assembly includes a plurality of wall portions, each of which encloses a receiving cavity, and a first channel is formed inside at least one of the wall portions; A battery cell group is arranged in the accommodation cavity; as well as The heat exchange component includes a first heat exchange member and a second heat exchange member, wherein the first heat exchange member is arranged in the accommodating cavity, and the second heat exchange member is arranged in the first channel, and the first heat exchange member and the second heat exchange member are used to exchange heat on at least two different surfaces of the battery cell group.

2. The battery device according to claim 1, characterized in that: The entire wall portion includes a bottom wall and multiple side walls, each of the side walls is arranged around the bottom wall, the first heat exchange element is arranged in the accommodating cavity and is located between the bottom wall and the battery cell group; the first channel is formed inside at least part of the side walls, and the second heat exchange element is arranged in the first channel.

3. The battery device according to claim 2, characterized in that: The box assembly further includes an end plate disposed in the accommodating cavity, the side walls having the first channel are disposed on opposite sides of the battery monomer group along a first direction, and the end plate is disposed on opposite sides of the battery monomer group along a second direction; A second channel is formed inside the end plate, and the heat exchange assembly further includes a third heat exchange component arranged in the second channel; the first direction and the second direction are arranged to intersect and are both parallel to the bottom wall.

4. The battery device according to claim 1, characterized in that: The entire wall portion includes a bottom wall and multiple side walls, each of the side walls is arranged around the bottom wall, the first channel is formed inside the bottom wall and at least part of the side walls, and the second heat exchange element includes multiple parts, some of which are arranged in the first channel of the bottom wall, and the rest of the second heat exchange element is arranged in the first channel of the side wall.

5. The battery device according to claim 1, characterized in that: The wall parts include a bottom wall and a plurality of side walls, each of the side walls is arranged around the bottom wall, and the first channel is formed inside the bottom wall; the box assembly also includes an end plate arranged in the accommodating cavity, the end plate is located between at least part of the side wall and the battery monomer group, and is used to limit the battery monomer group, and the end plate has a second channel formed inside; The second heat exchange element is disposed in the first channel, and the heat exchange assembly further includes a third heat exchange element disposed in the second channel.

6. The battery device according to claim 3 or 5, characterized in that: Every two end plates form a group, the end plates include multiple groups, and at least one battery cell group is arranged between each group of end plates; Wherein, each of the end plates is detachably arranged on the bottom wall.

7. The battery device according to claim 6, characterized in that: The two end plates in each group are spaced apart along a first direction, and the multiple groups of end plates are arranged along a second direction intersecting the first direction, and the second channels of two adjacent end plates are connected to each other; The third heat exchange component includes a heat exchange pipe, and the heat exchange pipe is passed through each of the second channels in each of the end plates on the same side.

8. The battery device according to claim 7, characterized in that: The heat exchange pipe is constructed as a flexible pipe.

9. The battery device according to claim 1, characterized in that: The first heat exchange element includes a water cooling plate.

10. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 9.

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