Battery device and electric device

Abstract

The utility model discloses a kind of battery device and electric device, battery device includes battery module, battery module includes functional component and battery monomer assembly, functional component is arranged in battery monomer assembly at least one side along second direction, functional component includes heat insulation plate and heating film, heating film is located at the side of heat insulation plate towards battery module and is heat conduction connection with battery monomer assembly. According to the battery device of the utility model embodiment, the heat insulation plate in the functional component of the battery device and the heating film and heat insulation plate can be pre-assembled into a whole, to simplify the operation step that heating film and heat insulation plate are assembled on battery monomer assembly, reduce the assembly time of functional component whole on battery monomer assembly, be favorable to improve assembly efficiency.

Description

Technical Field

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

[0002] In related technologies, heating films and heat insulation plates are often installed within the battery modules of battery devices. The heating film heats the individual battery cells, while the heat insulation plate effectively isolates heat transfer between adjacent battery cells. However, the installation methods of the heating film and heat insulation plate on the individual battery cells in these technologies are relatively complex, resulting in poor overall assembly efficiency of the battery device. Therefore, how to effectively improve assembly efficiency has become an urgent technical problem to be solved. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a battery device in which the heating film and heat insulation plate in the functional components of the battery module can be pre-assembled as a whole, thereby simplifying the operation steps of assembling the functional components as a whole onto the battery cell assembly, reducing assembly time, and improving assembly efficiency.

[0004] This utility model also proposes an electrical device that includes the above-mentioned battery device.

[0005] A battery device according to a first aspect of the present invention includes: a battery module, the battery module including functional components and battery cell assemblies, the functional components being disposed on at least one side of the battery cell assemblies along a second direction, the functional components including a heat insulation plate and a heating film, the heating film being disposed on the side of the heat insulation plate facing the battery module and being thermally connected to the battery cell assemblies.

[0006] According to the battery device of this utility model embodiment, a functional component is disposed on at least one side of the battery cell assembly along the second direction. The functional component includes a heat insulation plate and a heating film. The heating film is disposed on the side of the heat insulation plate facing the battery module and is thermally connected to the battery cell assembly. The heating film can achieve rapid heating of the battery cell assembly in low-temperature environments. The heat insulation plate can achieve heat insulation of the battery cell assembly during use. The heating film and the heat insulation plate can be pre-assembled into a whole to simplify the operation steps of assembling the heating film and the heat insulation plate on the battery cell assembly, reduce the assembly time of the functional component as a whole on the battery cell assembly, and improve assembly efficiency.

[0007] According to some embodiments of the present invention, the battery cell assembly includes multiple rows of battery cells arranged along a first direction, each row of battery cells including multiple battery cells arranged in a vertical direction, the dimension of a single battery cell in the second direction is w1, the thickness of the heating film in the second direction is w2, and the thickness of the heat insulation plate in the second direction is w3; wherein the ratio of w2 to w1 is in the range of 1:220 to 1:50; and / or, the ratio of w3 to w1 is in the range of 1:100 to 1:20.

[0008] According to some embodiments of the present invention, a first heat insulation member is provided between at least two adjacent battery cells in the vertical direction; wherein, the thickness of the first heat insulation member in the vertical direction is w4, the thickness of a single battery cell in the vertical direction is w5, and the ratio of w4 to w5 is in the range of 1:35 to 1:5.

[0009] According to some embodiments of the present invention, a second heat insulation member is provided between two adjacent rows of battery bars in the first direction; wherein, the thickness of the second heat insulation member in the first direction is w6, the size of a single battery cell in the first direction is w7, and the ratio of w6 to w7 is in the range of 1:200 to 1:25.

[0010] According to some embodiments of the present invention, the thickness of the heating film in the second direction is w2, the thickness of the heat insulation plate in the second direction is w3, and the ratio of w2 to w3 is in the range of 1:5 to 1:1.

[0011] According to some embodiments of the present invention, the heating film is bonded and fixed to the heat insulation plate; or, the heating film is hot-pressed and fixed to the heat insulation plate.

[0012] According to some embodiments of the present invention, the battery module includes a module end plate and a module pressure plate. The module end plate is disposed on both sides of the battery cell assembly along a first direction, and the module pressure plate is disposed on the upper and lower sides of the battery cell assembly. The module pressure plate and the module end plate are connected by a third fastener, and the first direction intersects with the second direction.

[0013] According to some embodiments of the present invention, the module end plate includes an end plate body and a first heat insulation layer, wherein the first heat insulation layer is located on the side of the end plate body facing the battery cell assembly; wherein the first heat insulation layer is bonded and fixed to the end plate body; or, the first heat insulation layer is hot-pressed and fixed to the end plate body.

[0014] According to some embodiments of the present invention, the module pressure plate includes a pressure plate body and a second heat insulation layer, the second heat insulation layer being located on the side of the pressure plate body facing the battery cell assembly; wherein, the second heat insulation layer is bonded and fixed to the pressure plate body; or, the second heat insulation layer is hot-pressed and fixed to the pressure plate body.

[0015] According to some embodiments of this utility model, it further includes: a housing, wherein a plurality of mounting guide rails are provided inside the housing, the mounting guide rails are located at the bottom of the housing and extend along a first direction, the plurality of mounting guide rails are arranged along a second direction, the housing has a mounting opening on one side along the first direction, and a cover plate is provided at the mounting opening, the first direction, the second direction and the up-down direction intersect each other; at least one battery module, the battery module is disposed inside the housing and supported on the mounting guide rails, the mounting guide rails are used to guide the battery module to slide along the first direction so that the battery module slides into or out of the housing.

[0016] According to some embodiments of the present invention, the multiple mounting guide rails are divided into at least one group of guide rails, each group of guide rails includes two mounting guide rails, and a single battery module corresponds to one group of guide rails; wherein, each mounting guide rail includes a support portion and a limiting portion, the support portion is connected to the bottom wall of the housing, the battery module is supported on the upper surface of the support portion, the limiting portion is connected to one side of the support portion along the second direction and protrudes upward from the support portion, and the limiting portions of the two mounting guide rails in the guide rail group are located on both sides of the corresponding battery module along the second direction.

[0017] According to some embodiments of the present invention, the battery module includes a module pressure plate, which is disposed on the upper and lower sides of the battery cell assembly. The module pressure plate includes a pressure plate body and a module support boss. The module support boss is disposed on the side of the pressure plate body opposite to the battery cell assembly and extends along the first direction. The module support boss in the lower module pressure plate is supported by the mounting guide rail.

[0018] According to some embodiments of the present invention, a cavity is formed inside the module support boss, and the cavity extends along the first direction; wherein, the cavity extends along the first direction through the module support boss and / or the side of the module support boss away from the pressure plate body and forms a plurality of heat dissipation holes arranged at intervals along the first direction.

[0019] According to some embodiments of the present invention, the battery module includes a module end plate, which is disposed on both sides of the battery cell assembly along the first direction and connected to the housing.

[0020] According to some embodiments of the present invention, the housing includes a first sidewall and two second sidewalls. The first sidewall and the mounting opening are located on both sides of the housing along the first direction, and the two second sidewalls are connected to the first sidewall on both sides along the second direction. The two module end plates located on both sides of the battery cell assembly along the first direction are a first module end plate and a second module end plate, respectively. The first module end plate is connected to the first sidewall by a first fastener. A module fixing plate is provided on the side of the second module end plate near the mounting opening, and the module fixing plate is connected to the housing.

[0021] According to some embodiments of the present invention, a module connecting plate is provided near the mounting port of the housing. The module connecting plate includes a first connecting portion extending in the vertical direction. The module fixing plate includes a fixing plate body and a second connecting portion. The fixing plate body is connected to the second module end plate. In the second direction, the second connecting portion is connected to the side of the fixing plate body near the second side wall. The second connecting portion and the first connecting portion are connected by a second fastener. The first connecting portion and the second connecting portion have an angle with the first direction and an angle with the second direction.

[0022] According to some embodiments of the present invention, the battery cell assembly includes multiple rows of battery cells arranged along the first direction, each row of the battery cell includes multiple battery cells arranged along the vertical direction, the battery cell is a square battery, and the battery cell has two large faces arranged opposite each other along the vertical direction, the first direction intersects the second direction.

[0023] According to some embodiments of the present invention, the battery module includes an integrated busbar, which is disposed on one side of the battery cell assembly along the second direction. The battery cell assembly is connected to at least one module connection bar, which is connected to the integrated busbar. A fuse is connected between at least one module connection bar and the integrated busbar. And / or, the battery module includes a terminal connection terminal, which is connected to the module connection bar.

[0024] An electrical device according to a second aspect of the present invention includes a battery device according to the first aspect of the present invention described above.

[0025] According to the embodiments of the present utility model, the electrical device is equipped with the above-mentioned battery device, which makes the assembly of the functional components in the battery module and the battery cell assembly more convenient and efficient, thus improving the assembly convenience and efficiency of the electrical device.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of a battery device according to some embodiments of the present invention;

[0029] Figure 2 yes Figure 1 A sectional view along line AA.

[0030] Figure 3 yes Figure 2 Enlarged view of point C in the middle;

[0031] Figure 4 yes Figure 1 Sectional view along line BB;

[0032] Figure 5 yes Figure 1 A schematic diagram of the battery device from another angle;

[0033] Figure 6 yes Figure 5 A sectional view along the DD line;

[0034] Figure 7 yes Figure 5 A schematic diagram of part of the battery device structure;

[0035] Figure 8 yes Figure 7 A schematic diagram of part of the battery device structure from another angle;

[0036] Figure 9 yes Figure 1 A schematic diagram of the housing in the battery device;

[0037] Figure 10 yes Figure 1 A schematic diagram of the cover plate in the battery device;

[0038] Figure 11 yes Figure 1 A schematic diagram showing the separation of multiple battery modules from the module mounting plate in a battery device;

[0039] Figure 12 yes Figure 11 A schematic diagram of the module mounting plate;

[0040] Figure 13 yes Figure 11 A schematic diagram showing the separation of multiple battery modules;

[0041] Figure 14 yes Figure 13 A schematic diagram of a single battery module in the diagram;

[0042] Figure 15 yes Figure 14 Exploded view of a single battery module in the image;

[0043] Figure 16 yes Figure 15 A schematic diagram of the module end plate in the battery module;

[0044] Figure 17 yes Figure 15 A schematic diagram of the module pressure plate in the battery module;

[0045] Figure 18 yes Figure 13 A schematic diagram showing the separation of the heat insulation plate and heating film between two adjacent battery modules;

[0046] Figure 19 This is a simplified diagram of an electrical device according to some embodiments of the present invention.

[0047] Figure label:

[0048] 1000. Electrical appliances;

[0049] 200. Vehicle body;

[0050] 100. Battery device;

[0051] 1. Battery module; 11. Module pressure plate; 111. Pressure plate body; 112. Module support boss; 1121. Cavity; 1122. Heat dissipation hole; 12a. Battery cell assembly; 12. Battery array; 121. Battery cell; 1211. Large surface; 1212. First heat insulation component; 122. Heat insulation plate; 1221. Heating film; 123. Second heat insulation component; 13a. Module end plate; 130. End plate body; 131 1311 First module end plate; 132 Second module end plate; 133 Module fixing plate; 1331 Fixing plate body; 1332 Second connecting part; 134 Third fastener; 135 First heat insulation layer; 136 Second heat insulation layer; 137 Press-fit stud; 14 Integrated busbar; 15 Module connection busbar; 16 Fuse; 17 Terminal connection terminal; 18 Insulating column assembly;

[0052] 2. Housing; 2a. Guide rail assembly; 21. Mounting guide rail; 211. Support part; 212. Limiting part; 22. Mounting port; 23. Cover plate; 231. First sealing element; 232. Interface; 2321. Second sealing element; 233. Vent valve; 24. First side wall; 25. Second side wall; 26. Module connecting plate; 261. First connecting part; 2611. Second fastener; 27. Hanging lug. Detailed Implementation

[0053] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0054] The following is for reference. Figures 1-18 A battery device 100 according to an embodiment of the present invention is described.

[0055] Reference Figure 13 , Figure 15 and Figure 18 According to a first aspect embodiment of the present invention, a battery device 100 includes a battery module 1. The battery module 1 includes a functional component and a battery cell assembly 12a. The functional component is disposed on at least one side of the battery cell assembly 12a along a second direction (e.g., the e2 direction in the figures). The functional component includes a heat insulation plate 122 and a heating film 1221. The heating film 1221 is disposed on the side of the heat insulation plate 122 facing the battery module 1 and is thermally connected to the battery cell assembly 12a.

[0056] The arrangement of functional components on at least one side of the battery cell assembly 12a along the second direction may include the following situations: for example, the functional components may be provided on one side of the battery cell assembly 12a along the second direction; or, for another example, the functional components may be provided on both sides of the battery cell assembly 12a along the second direction.

[0057] The functional components include a heat insulation plate 122 and a heating film 1221. The heating film 1221 is disposed on the side of the heat insulation plate 122 facing the battery module 1 and is thermally connected to the battery cell assembly 12a. The heating film 1221 can achieve rapid heating of the battery cell assembly 12a in low-temperature environments, and the heat insulation plate 122 can achieve heat insulation of the battery cell assembly 12a during use.

[0058] Furthermore, the heating film 1221 can be pre-assembled with the heat insulation plate 122 as a whole, which simplifies the operation steps of assembling the heating film 1221 and the heat insulation plate 122 on the battery cell assembly 12a, reduces the assembly time of functional components on the battery cell assembly 12a, and helps to improve assembly efficiency. For example, the heating film 1221 can be bonded to the heat insulation plate 122; or, the heating film 1221 can be hot-pressed to the heat insulation plate 122.

[0059] For example, the heating film 1221 includes an insulating protective layer, a heating layer, a conductive layer, an insulating and heat-insulating layer, and a substrate, and the insulating protective layer, the heating layer, the conductive layer, the insulating and heat-insulating layer, and the substrate are arranged sequentially along the second direction. The heat insulation plate 122 includes a plastic insulating layer, a ceramic felt layer, a mica plate layer, and a fiber braided layer, and the plastic insulating layer, the ceramic felt layer, the mica plate layer, and the fiber braided layer are arranged sequentially along the second direction. The insulating protective layer and the fiber braided layer are connected.

[0060] For example, the insulating protective layer and the fiber braided layer can be connected by snap-fit ​​or by adhesive bonding, making the connection between the heating film 1221 and the heat insulation plate 122 simple and with strong stability.

[0061] The heating film 1221 includes an insulating protective layer, a heating layer, a conductive layer, an insulating and heat-insulating layer, and a substrate. The heat insulation plate 122 includes a plastic insulating layer, a ceramic felt layer, a mica plate layer, and a fiber braided layer. The composite heating film 1221 and the composite heat insulation plate 122 have better thermal runaway suppression effects.

[0062] By connecting the insulating protective layer and the fiber braided layer, the composite heating film 1221 and the composite heat insulation plate 122 can be pre-assembled into a whole, reducing the need for multiple manual disassembly and assembly. This can improve the assembly efficiency between the two adjacent battery modules 1 of the heating film 1221 and the heat insulation plate 122, thereby improving the overall assembly efficiency of the battery device 100 and making the structure more stable.

[0063] For example, the insulating layer of the heating film 1221 is made of ceramic material, the heating layer is made of precious metals and their oxides, the conductive layer contains conductive silver, platinum and other precious metals, the insulating and heat-insulating layer is made of ceramic material, and the substrate is made of stainless steel, alumina, ceramic material, etc. The thermal conductivity is selected according to the actual application scenario to meet the different thermal conductivity and heat insulation selection of the interface material of the integrated body.

[0064] For example, the plastic insulation layer, ceramic felt layer, mica board layer and fiber braided layer of the heat insulation board 122 are bonded together, making the connection between the layers of the heat insulation board 122 simple and with strong stability.

[0065] According to the embodiment of the present invention, the battery device 100 has functional components disposed on at least one side of the battery cell assembly 12a along the second direction. The functional components include a heat insulation plate 122 and a heating film 1221. The heating film 1221 is disposed on the side of the heat insulation plate 122 facing the battery module 1 and is thermally connected to the battery cell assembly 12a. The heating film 1221 can achieve rapid heating of the battery cell assembly 12a in low-temperature environments. The heat insulation plate 122 can achieve heat insulation of the battery cell assembly 12a during use. The heating film 1221 and the heat insulation plate 122 can be pre-assembled into a whole to simplify the operation steps of assembling the heating film 1221 and the heat insulation plate 122 on the battery cell assembly 12a, reduce the assembly time of the functional components on the battery cell assembly 12a, and improve assembly efficiency.

[0066] Reference Figure 13 and Figure 15 According to some embodiments of the present invention, the battery cell assembly 12a includes multiple rows of battery bars 12 arranged along a first direction (e.g., referring to direction e1 in the figures), each row of battery bars 12 includes multiple battery cells 121 arranged in a vertical direction, the dimension of a single battery cell 121 in a second direction is w1, the thickness dimension of the heating film 1221 in the second direction is w2, and the thickness dimension of the heat insulation plate 122 in the second direction is w3, wherein the ratio of w2 to w1 ranges from 1:220 to 1:50; and / or the ratio of w3 to w1 ranges from 1:100 to 1:20.

[0067] For example, the ratio of w2 to w1 can be 1:220, 1:150, 1:125, 1:75, 1:50, etc.

[0068] By using a ratio of the thickness w2 of the heating film 1221 in the second direction to the dimension w1 of a single battery cell 121 in the second direction, which ranges from 1:220 to 1:50, the heating film 1221 can have a certain thickness to effectively block heat transfer between the battery cells 121 of two adjacent battery modules 1, while reducing the space occupied by the heating film 1221 in the second direction. In this way, with a fixed space inside the housing 2 of the battery device 100, as many battery cells 121 as possible can be placed along the second direction, which is beneficial to improving the energy density of the battery device 100.

[0069] For example, the ratio of w3 to w1 can be 1:100, 1:80, 1:65, 1:35, 1:20, etc.

[0070] By using a ratio of the thickness w3 of the heat insulation plate 122 in the second direction to the dimension w1 of a single battery cell 121 in the second direction, which is in the range of 1:100 to 1:50, the heat insulation plate 122 can have a certain thickness to effectively block the heat transfer between the battery cells 121 of two adjacent battery modules 1, while reducing the space occupied by the heat insulation plate 122 in the second direction. In this way, with a fixed space inside the housing 2 of the battery device 100, as many battery cells 121 as possible can be placed along the second direction, which is beneficial to improving the energy density of the battery device 100.

[0071] Reference Figure 15 According to some embodiments of this utility model, a first heat insulation member 1212 is provided between at least some adjacent battery cells 121 in the vertical direction. The thickness of the first heat insulation member 1212 in the vertical direction is w4, and the thickness of a single battery cell in the vertical direction is w5. The ratio of w4 to w5 ranges from 1:35 to 1:5. For example, the ratio of w4 to w5 can be 1:35, 1:20, 1:15, 1:10, 1:5, etc.

[0072] The provision of a first heat insulation element 1212 between at least some of two adjacent battery cells 121 may include the following situations: for example, the first heat insulation element 1212 may be provided between some of two adjacent battery cells 121; or, for example, the first heat insulation element 1212 may be provided between all two adjacent battery cells 121.

[0073] By providing a first heat insulation member 1212 in the vertical direction between the large surfaces 1211 of at least two adjacent battery cells 121, the first heat insulation member 1212 can block the heat transfer between two adjacent battery cells 121, avoid the excessive heat of one battery cell 121 from interfering with the adjacent battery cells 121, and help reduce the possibility of thermal runaway.

[0074] For example, the first heat insulation component 1212 uses insulating heat insulation material, such as aerogel and buffer foam integrated encapsulation. By providing the first heat insulation component 1212 between at least some of the two adjacent battery cells 121, the possibility of adjacent battery cells 121 being electrically connected due to direct contact can be effectively avoided, and the thermal runaway suppression effect of the battery module 1 can also be better.

[0075] Furthermore, by using a ratio of 1:35 to 1:5 between the thickness w4 of the first heat insulation component 1212 in the vertical direction and the vertical dimension w5 of a single battery cell, the first heat insulation component 1212 can have a certain thickness to effectively block heat transfer between two adjacent battery cells 121, while reducing the space occupied by the first heat insulation component 1212 in the vertical direction. In this way, with a fixed space inside the housing 2 of the battery device 100, as many battery cells 121 as possible can be placed in the vertical direction, which is beneficial to improving the energy density of the battery device 100.

[0076] Reference Figure 15 According to some embodiments of this utility model, a second heat insulation member 123 is provided between two adjacent rows of battery packs 12 in the first direction. The thickness of the second heat insulation member 123 in the first direction is w6, and the dimension of a single battery cell in the first direction is w7. The ratio of w6 to w7 ranges from 1:200 to 1:25. For example, the ratio of w6 to w7 can be 1:200, 1:150, 1:100, 1:50, 1:25, etc.

[0077] By providing a second heat insulation element 123 between two adjacent battery packs 12 in the first direction, the second heat insulation element 123 can block the heat transfer between the battery cells 121 of the two adjacent battery packs 12, and prevent the battery cells 121 in one battery pack 12 from getting too hot and interfering with the battery cells 121 of the adjacent battery packs 12, which helps to reduce the possibility of thermal runaway.

[0078] For example, the second heat insulation component 123 uses insulating heat insulation material, such as aerogel and buffer foam integrated encapsulation. By providing the second heat insulation component 123 between two adjacent rows of battery bars 12 in the first direction, the possibility of the battery cells 121 of the two adjacent rows of battery bars 12 being electrically connected due to direct contact can be effectively avoided, and the thermal runaway suppression effect of the battery module 1 can also be better.

[0079] Furthermore, by having a thickness w6 of the second heat insulation member 123 in the first direction and a single battery cell size w7 in the first direction in a ratio range of 1:200 to 1:25, the second heat insulation member 123 can have a certain thickness to effectively block heat transfer between battery cells 121 in adjacent rows of battery packs 12, while reducing the space occupied by the second heat insulation member 123 in the first direction. In this way, with a fixed space inside the housing 2 of the battery device 100, as many battery cells 121 as possible can be placed along the first direction, which is beneficial to improving the energy density of the battery device 100.

[0080] Reference Figure 13 , Figure 15 and Figure 18According to some embodiments of this utility model, the thickness dimension of the heating film 1221 in the second direction is w2, and the thickness dimension of the heat insulation plate 122 in the second direction is w3, and the ratio of w2 to w3 is in the range of 1:5 to 1:1. For example, the ratio of w2 to w3 can be 1:5, 1:4, 1:3, 1:2, 1:1, etc.

[0081] By using a ratio of 1:5 to 1:1 between the thickness w2 of the heating film 1221 in the second direction and the thickness w3 of the heat insulation plate 122 in the second direction, the heating film 1221 and the heat insulation plate 122 can have a certain thickness to quickly achieve rapid heating of the battery cell assembly 12a in low-temperature environments and heat insulation during the use of the battery cell assembly 12a. It can also reduce the space occupied by the heating film 1221 and the heat insulation plate 122 in the second direction. In this way, with a certain amount of space inside the housing 2 of the battery device 100, as many battery cells 121 as possible can be placed along the second direction, which is beneficial to improving the energy density of the battery device 100.

[0082] Reference Figure 13 , Figure 15 and Figure 18 According to some embodiments of the present invention, the heating film 1221 is bonded and fixed to the heat insulation plate 122, which makes the connection between the heating film 1221 and the heat insulation plate 122 simple and has strong stability.

[0083] Alternatively, the heating film 1221 can be hot-pressed and fixed to the heat insulation plate 122, which can make the connection between the heating film 1221 and the heat insulation plate 122 simple and have strong stability.

[0084] Of course, the connection method between the heating film 1221 and the heat insulation plate 122 is not limited to this.

[0085] Reference Figure 2 , Figure 6 , Figure 7 , Figure 11 and Figure 15 According to some embodiments of the present invention, the battery module 1 includes a module end plate 13a and a module pressure plate 11. The module end plate 13a is disposed on both sides of the battery cell assembly 12a along the first direction, and the module pressure plate 11 is disposed on the upper and lower sides of the battery cell assembly 12a. The module pressure plate 11 and the module end plate 13a are connected by a third fastener 134. The first direction intersects with the second direction.

[0086] The module pressure plate 11 is disposed on the upper and lower sides of the battery cell assembly 12a, and the module end plate 13a is disposed on both sides of the battery cell assembly 12a along the first direction. The module pressure plate 11 and the module end plate 13a are connected by a third fastener 134. This connection method between the module pressure plate 11 and the module end plate 13a is simple and has strong stability, and also allows for a detachable connection between the module pressure plate 11 and the module end plate 13a. For example, anti-loosening washers or thread-locking adhesive are provided between the third fastener 134 and both the module pressure plate 11 and the module end plate 13a, which can further improve the connection stability between the module pressure plate 11 and the module end plate 13a.

[0087] Furthermore, since the battery module 1 includes a module end plate 13a, a module pressure plate 11, and a battery cell assembly 12a, the battery cell assembly 12a can be pre-assembled into a whole by the module end plate 13a and the module pressure plate 11, realizing the group installation of the battery module 1. The module end plate 13a can apply a clamping force to the battery cell assembly 12a in the vertical direction, and the module pressure plate 11 can apply a clamping force to the battery cell assembly 12a in the first direction, so as to play a bidirectional fastening role for the battery cell assembly 12a in the vertical direction and the first direction, making the overall structure of the battery module 1 more compact and reducing the space occupied by the battery module 1.

[0088] Reference Figures 13-15 According to some embodiments of the present invention, the module end plate 13a includes an end plate body 130 and a first heat insulation layer 135. The first heat insulation layer 135 is located on the side of the end plate body 130 facing the battery cell assembly 12a. The first heat insulation layer 135 is bonded and fixed to the end plate body 130; or, the first heat insulation layer 135 is hot-pressed and fixed to the end plate body 130.

[0089] For example, the module end plate 13a can be made of aluminum, thermoplastic or other base materials.

[0090] A first heat insulation layer 135 is provided on the side of the module end plate 13a facing the battery cell assembly 12a. The first heat insulation layer 135 can enhance the overall structural strength of the module pressure plate 11 to a certain extent, so that the module end plate 13a can take into account both rigidity and heat insulation performance, effectively delaying the triggering time of thermal runaway of the battery cell assembly 12a. For example, the first heat insulation layer 135 can block the possibility of heat from the external environment of the housing 2 or heat generated by other components inside the housing 2 being transferred to the battery cell assembly 12a through the module end plate 13a, avoiding the abnormal temperature rise of the battery cell assembly 12a due to the introduction of external heat, and reducing the possibility of thermal runaway. Correspondingly, if a battery cell assembly 12a experiences thermal runaway, the first heat insulation layer 135 can also block the possibility of the heat generated by the battery cell assembly 12a spreading to adjacent battery modules 1 or other areas inside the housing 2 in the first direction.

[0091] By bonding the first heat insulation layer 135 to the end plate body 130 or by hot-pressing the first heat insulation layer 135 to the end plate body 130, the connection between the first heat insulation layer 135 and the end plate body 130 can be simple and has strong stability.

[0092] Reference Figures 13-15 According to some embodiments of the present invention, the module pressure plate 11 includes a pressure plate body 111 and a second heat insulation layer 136. The second heat insulation layer 136 is located on the side of the pressure plate body 111 facing the battery cell assembly 12a. The second heat insulation layer 136 is bonded and fixed to the pressure plate body 111; or, the second heat insulation layer 136 is hot-pressed and fixed to the pressure plate body 111.

[0093] A second heat insulation layer 136 is provided on the side of the module pressure plate 11 facing the battery cell assembly 12a. The second heat insulation layer 136 can enhance the overall structural strength of the module pressure plate 11 to a certain extent, so that the module pressure plate 11 can take into account both rigidity and heat insulation performance, effectively delaying the triggering time of thermal runaway of the battery cell assembly 12a. For example, the second heat insulation layer 136 can block the possibility of heat from the external environment of the housing 2 or heat generated by other components inside the housing 2 being transferred to the battery cell assembly 12a through the module end plate 13a, avoiding the abnormal temperature rise of the battery cell assembly 12a due to the introduction of external heat into the battery cell assembly 12a, and reducing the possibility of thermal runaway. Correspondingly, if a battery cell assembly 12a experiences thermal runaway, the second heat insulation layer 136 can also block the possibility of the heat generated by the battery cell assembly 12a spreading to adjacent battery modules 1 or other areas inside the housing 2 in the vertical direction.

[0094] By bonding the second heat insulation layer 136 to the pressure plate body 111 or by hot-pressing the second heat insulation layer 136 to the pressure plate body 111, the connection between the second heat insulation layer 136 and the pressure plate body 111 can be simple and has strong stability.

[0095] In addition, a first heat insulation layer 135 is provided on the side of the module end plate 13a facing the battery cell assembly 12a, and a second heat insulation layer 136 is provided on the side of the module pressure plate 11 facing the battery cell assembly 12a. This can form a double heat insulation barrier along the first direction and the up and down direction, controlling the heat generated by the single battery cell assembly 12a locally, which is beneficial to improving the overall safety of the battery device 100.

[0096] Reference Figure 2 , Figure 7 and Figure 9 According to some embodiments of the present invention, the battery device 100 includes a housing 2 and at least one battery module 1. The housing 2 is provided with a plurality of mounting rails 21. The mounting rails 21 are located at the bottom of the housing 2 and extend along a first direction. The plurality of mounting rails 21 are arranged along a second direction. The housing 2 has a mounting opening 22 on one side along the first direction. A cover plate 23 is provided at the mounting opening 22. The first direction, the second direction and the up and down direction intersect each other. The battery module 1 is located in the housing 2 and is supported on the mounting rails 21. The mounting rails 21 are used to guide the battery module 1 to slide along the first direction so that the battery module 1 slides into or out of the housing 2.

[0097] The housing 2 has an installation port 22 on one side along the first direction. The installation port 22 facilitates the installation of the battery module 1 into the housing 2. A cover plate 23 is provided at the installation port 22 to reduce or prevent the possibility of external dust and other impurities entering the housing 2 through the installation port 22.

[0098] For example, a first sealing element 231 is provided on the outer periphery of the mounting port 22. The first sealing element 231 is located between the cover plate 23 and the box body 2, which can improve the sealing and protection effect between the cover plate 23 and the box body 2.

[0099] For example, an interface 232 is formed on the cover plate 23. The interface 232 is used to connect with components outside the housing 2, such as external thermal management components, so that heat inside the battery housing 2 can be transferred to the thermal management components. For example, a second seal 2321 is provided on the outer periphery of the interface 232, which can improve the sealing effect between the cover plate 23 and the external thermal pipeline components and reduce the possibility of heat or other impurities leaking through the interface 232. Furthermore, by reserving the interface 232 on the cover plate 23 to connect with external components, the sealing and protection capability of the battery device 100 is improved.

[0100] For example, the cover plate 23 is provided with a vent valve 233. The vent valve 233 can also achieve better sealing and pressure balance inside the battery device 100. For example, in the event of thermal runaway, the vent valve 233 can open in time, so that the high temperature gas inside the battery device 100 can be discharged in time, which is conducive to improving the safety of the battery device 100.

[0101] The housing 2 is equipped with an installation guide rail 21 extending along a first direction. The installation guide rail 21 can provide stable support for the battery module 1 and guide the assembly of the battery module 1 within the housing 2. The battery module 1 can slide directly into the housing 2 along the extension direction of the installation guide rail 21, so that the battery module 1 is assembled into the housing 2 according to a preset trajectory and direction. This can prevent the battery module 1 from shifting to other directions during the installation process, saving the time wasted on positioning and effectively improving assembly efficiency. Furthermore, by sliding the battery module 1 into the housing 2, the operator can use relatively little force to install the battery module 1 into the housing 2. The operator only needs to apply a pushing force to push the battery module 1 into the housing 2, making the assembly between the battery module 1 and the housing 2 more convenient.

[0102] By providing multiple mounting rails 21 inside the housing 2, the weight of the battery module 1 can be distributed more evenly, reducing or avoiding the possibility of deformation due to excessive force on a single mounting rail 21, thus making the battery module 1 more stably located inside the housing 2.

[0103] For example, compared to relying on a hoisting device to install the battery module 1 into the housing 2, by sliding the battery module 1 into the housing 2, the operator only needs to push it to complete the installation and positioning of the battery module 1. This can eliminate the hoisting and alignment process, greatly reduce the complexity of the assembly operation, effectively reduce the time wasted due to hoisting and alignment, and also eliminate the need for a dedicated hoisting station, reducing the requirements for assembly space. This allows the assembly operation to be carried out more flexibly in more scenarios. Even in scenarios with narrow space and no dedicated hoisting station, the operator can still complete the assembly of the battery module 1 and the housing 2.

[0104] For example, the outer side of the housing 2 is provided with a hanging lug 27, which can provide a gripping point for the housing 2. For example, when moving the housing 2 with the help of other devices, the other devices can move the housing 2 by gripping the hanging lug 27, making the movement of the housing 2 more convenient. For example, the hanging lug 27 can be gripped by other devices, such as a hoisting device directly gripping the hanging lug 27 to move the housing 2 to the installation position of the battery module 1, so as to facilitate the assembly between the battery module 1 and the housing 2. Alternatively, after the battery module 1 and the housing 2 are assembled, the hanging lug 27 can be gripped by a hoisting device to move the battery device 100 as a whole to the next work station, so as to facilitate subsequent processes.

[0105] In the description of this utility model, "multiple" means two or more.

[0106] The housing 2 is equipped with an installation guide rail 21 extending in a first direction. The installation guide rail 21 guides the assembly of the battery module 1 within the housing 2. The battery module 1 can slide directly into the housing 2 along the extension direction of the installation guide rail 21, so that the battery module 1 is assembled into the housing 2 according to the preset trajectory and direction, saving the time wasted on positioning and preventing the battery module 1 from shifting to other directions during the installation process, effectively improving assembly efficiency. Furthermore, by guiding the battery module 1 to slide into the housing 2 through the installation guide rail 21, the operator can use relatively little force to install the battery module 1 into the housing 2. The operator only needs to apply a pushing force to push the battery module 1 into the housing 2, making the assembly between the battery module 1 and the housing 2 more convenient.

[0107] Reference Figure 2 , Figure 3 , Figure 7 and Figure 9 According to some embodiments of this utility model, multiple mounting rails 21 are divided into at least one set of rail groups 2a. Each set of rail groups 2a includes two mounting rails 21, and a single battery module 1 corresponds to one set of rail groups 2a. By dividing multiple mounting rails 21 into at least one set of rail groups 2a, and each set of rail groups 2a includes two mounting rails 21, and a single battery module 1 corresponds to one set of rail groups 2a, a matching relationship between the module and the rail group 2a can be formed. This can save the process of repeated positioning. It is only necessary to place the single battery module 1 into the corresponding rail group 2a and slide it into the housing 2 along the extension direction of the mounting rail 21 to complete the installation of the single battery module 1 in the housing 2.

[0108] For example, compared to the traditional hoisting method of repeatedly adjusting the posture of the battery module 1 to align with the preset installation position of the battery module 1 in the housing 2, matching a single battery module 1 with one of the guide rail groups 2a can reduce the positioning time and effectively improve assembly efficiency.

[0109] Each mounting rail 21 includes a support portion 211 and a limiting portion 212. The support portion 211 is connected to the bottom wall of the housing 2, and the battery module 1 is supported on the upper surface of the support portion 211. The limiting portion 212 is connected to one side of the support portion 211 along the second direction and protrudes upward from the support portion 211. The limiting portions 212 of the two mounting rails 21 in the rail group 2a are located on both sides of the corresponding battery module 1 along the second direction.

[0110] Each mounting rail 21 includes a support portion 211 and a limiting portion 212. The support portion 211 is connected to the bottom wall of the housing 2, and the battery module 1 is supported on the upper surface of the support portion 211. The support portion 211 can provide stable support for the battery module 1. Furthermore, the limiting portion 212 is connected to one side of the support portion 211 along the second direction and protrudes from the support portion 211. The limiting portions 212 of the two mounting rails 21 in the rail group 2a are located on opposite sides of the corresponding battery module 1 along the second direction. The limiting portion 212 can limit the battery module 1 and form a bidirectional clamping limiting effect, so that the battery module 1 is more stably located on the corresponding rail group 2a, effectively reducing the possibility of the battery module 1 shifting relative to the rail group 2a along the second direction.

[0111] In addition, by supporting the battery module 1 on the upper surface of the support part 211, the battery module 1 can be separated from the bottom wall of the box 2, reducing friction and wear between the battery module 1 and the bottom of the box 2. For example, the box 2 has a mounting frame at the mounting port 22, and there is a certain height difference between the upper surface of the bottom plate of the mounting frame and the upper surface of the bottom wall of the box 2. The mounting guide 21 includes the support part 211, and the battery module 1 is supported on the upper surface of the support part 211. For example, the upper surface of the support part 211 is flush with or higher than the upper surface of the bottom plate of the mounting frame. In this way, during the process of installing the battery module 1 into the box 2, friction and wear caused by interference between the battery module 1 and the bottom plate of the mounting frame can be avoided, and jamming during the assembly process of the battery module 1 can be eliminated, allowing the battery module 1 to slide into the box 2 more smoothly.

[0112] Reference Figure 2 , Figure 3 , Figure 7 , Figure 15 and Figure 17 According to some embodiments of the present invention, the battery module 1 includes a module pressure plate 11, which is disposed on the upper and lower sides of the battery cell assembly 12a. The module pressure plate 11 includes a pressure plate body 111 and a module support boss 112. The module support boss 112 is disposed on the side of the pressure plate body 111 away from the battery cell assembly 12a and extends along a first direction. The module support boss 112 in the lower module pressure plate 11 is supported by the mounting guide rail 21.

[0113] By setting the module pressure plate 11 on the upper and lower sides of the battery cell assembly 12a, a clamping force can be applied to the battery cell assembly 12a in the vertical direction, making the structure of the battery cell assembly 12a more compact in the vertical direction. This allows the battery cell assembly 12a to be smaller in size in the vertical direction, thereby reducing the space occupied by the battery cell assembly 12a in the vertical direction. In addition, the module pressure plate 11 can also support and protect the battery cell assembly 12a on both sides in the vertical direction, reducing the possibility of damage to the battery cell assembly 12a due to external forces in the vertical direction.

[0114] The module pressure plate 11 includes a pressure plate body 111 and a module support boss 112. The module support boss 112 is located on the side of the pressure plate body 111 away from the battery cell assembly 12a. The module support boss 112 can enhance the structural strength of the module pressure plate 11 to a certain extent and reduce the possibility of deformation of the module pressure plate 11. The module support boss 112 extends along the first direction and is located on the lower side of the module pressure plate 11. The module support boss 112 is supported on the mounting guide rail 21, so that the extension direction of the module support boss 112 and the mounting guide rail 21 are the same. This allows the module support boss 112 to transmit the supporting force of the mounting guide rail 21 to the battery cell assembly 12a more stably, so that the battery cell assembly 12a is more stably supported on the mounting guide rail 21. Furthermore, by using the module support boss 112 as a contact carrier between the battery cell assembly 12a and the mounting guide rail 21, friction and wear caused by direct contact between the battery cell assembly 12a and the mounting guide rail 21 can be avoided, which is beneficial to extending the service life of the battery cell assembly 12a.

[0115] Reference Figure 2 , Figure 3 , Figure 7 , Figure 15 and Figure 17 According to some embodiments of the present invention, a cavity 1121 is formed in the module support boss 112, and the cavity 1121 extends along a first direction. The cavity 1121 penetrates the module support boss 112 along the first direction and / or a plurality of heat dissipation holes 1122 are formed on the side of the module support boss 112 away from the pressure plate body 111 along the first direction.

[0116] The cavity 1121 formed in the module support boss 112 can reduce the weight of the module pressure plate 11, which is conducive to the lightweighting of the battery device 100. During the operation of the battery device 100, the heat generated by the battery cell assembly 12a can be transferred to the cavity 1121 to reduce the possibility of excessive internal temperature of the battery cell assembly 12a.

[0117] By passing through the module support boss 112 in the first direction via the cavity 1121, the convection of air in the cavity 1121 can be used to remove the heat generated by the battery cell assembly 12a, thereby accelerating the heat dissipation efficiency of the battery cell assembly 12a and improving the heat dissipation effect of the battery device 100.

[0118] Alternatively, a plurality of heat dissipation holes 1122 are formed on the side of the module support boss 112 away from the pressure plate body 111, arranged at intervals along the first direction. The heat transferred from the battery cell assembly 12a to the cavity 1121 can be dissipated through the plurality of heat dissipation holes 1122 arranged at intervals along the first direction. This can effectively reduce the possibility of local overheating of the battery cell assembly 12a, and can also further increase the heat dissipation space, which is conducive to accelerating the heat dissipation efficiency of the battery cell assembly 12a and improving the heat dissipation effect of the battery device 100. In addition, the heat dissipation holes 1122 can also further reduce the weight of the module pressure plate 11, which is conducive to the overall lightweighting of the battery device 100.

[0119] For example, an interface 232 is formed on the cover plate 23. The interface 232 is used to connect with components outside the housing 2, such as external thermal management components. This allows the interface 232 to form a heat dissipation output channel with the cavity 1121 in the module support boss 112, so that the heat inside the housing 2 can be transferred to the thermal management components, so that the heat inside the housing 2 can be quickly dissipated.

[0120] Reference Figure 2 , Figure 7 , Figure 11 , Figure 15 and Figure 16 According to some embodiments of the present invention, the battery module 1 includes a module end plate 13a, which is disposed on both sides of the battery cell assembly 12a along the first direction and is connected to the housing 2.

[0121] By setting the module end plates 13a on both sides of the battery cell assembly 12a along the first direction, a clamping force can be applied to the battery cell assembly 12a along the first direction, making the structure of the battery cell assembly 12a more compact along the first direction. This allows the battery cell assembly 12a to be smaller in size in the first direction, thereby reducing the space occupied by the battery cell assembly 12a in the first direction. The module end plates 13a can also support and protect the battery cell assembly 12a on both sides along the first direction, reducing the possibility of damage to the battery cell assembly 12a due to external forces in the first direction. Furthermore, by connecting the module end plates 13a to the housing 2, the connection between the battery module 1 and the housing 2 can be realized.

[0122] Reference Figure 2 , Figure 7 , Figure 8 , Figure 11and Figure 13 According to some embodiments of the present invention, the housing 2 includes a first side wall 24 and two second side walls 25. The first side wall 24 and the mounting port 22 are located on both sides of the housing 2 along a first direction. The two second side walls 25 are connected to the first side wall 24 along a second direction. The two module end plates 13a located on both sides of the battery cell assembly 12a along the first direction are the first module end plate 131 and the second module end plate 132, respectively. The first module end plate 131 is connected to the first side wall 24 by a first fastener 1311. A module fixing plate 133 is provided on the side of the second module end plate 132 near the mounting port 22. The module fixing plate 133 is connected to the housing 2.

[0123] Two module end plates 13a located on both sides of the battery cell assembly 12a along the first direction are respectively the first module end plate 131 and the second module end plate 132. The first module end plate 131 is connected to the first side wall 24 by the first fastener 1311. The second module end plate 132 is provided with a module fixing plate 133 on the side near the mounting port 22. The module fixing plate 133 is connected to the housing 2, which can realize the connection between the battery cell assembly 12a and the housing 2, and can also realize the multi-point fixed connection between the battery cell assembly 12a and the housing 2, which is beneficial to enhance the connection stability between the battery cell assembly 12a and the housing 2.

[0124] The connection between the first module end plate 131 and the first side wall 24 via the first fastener 1311 simplifies the connection between the battery module 1 and the housing 2, ensuring strong stability. It also allows for a detachable connection between the battery module 1 and the housing 2, facilitating replacement or maintenance of the battery module 1. For example, the first fastener 1311 may be a flat-head screw and / or have a rubber sealing ring on its outer periphery, further enhancing the connection strength and reliability between the first fastener 1311, the first module end plate 131, and the first side wall 24.

[0125] Furthermore, with the first module end plate 131 and the second module end plate 132 located on both sides of the battery cell assembly 12a along the first direction, the first module end plate 131 is connected to the first side wall 24 via the first fastener 1311 and the second module end plate 132 is connected via the module fixing plate 133. This creates a double fixing effect on both sides of the battery cell assembly 12a along the first direction, making the battery cell assembly 12a more stably located inside the housing 2 and effectively reducing the possibility of the battery cell assembly 12a moving relative to the housing 2 along the first direction.

[0126] For example, the assembly process between the battery module 1 and the housing 2 can be as follows: support the battery module 1 on the mounting guide rail 21, push the battery module 1 towards the inside of the housing 2 in the first direction so that the battery module 1 slides into the housing 2 in the first direction. When the battery module 1 slides to the preset position, the first module end plate 131 is connected to the first side wall 24 by the first fastening and the second module end plate 132 is connected to the second side wall 25 by the module fixing plate 133, thus completing the assembly between the battery module 1 and the housing 2.

[0127] For example, the module end plate 13a is provided with a press-fit stud 137 for mounting the insulating column assembly 18. The press-fit stud 137 can also be used for mounting auxiliary components. The press-fit stud 137 can guide the mounting of the insulating column assembly 18 or other components, making the assembly of the insulating column assembly 18 or other auxiliary components on the module end plate 13a more convenient, and also making the assembly position of the insulating column assembly 18 or other components on the battery module 1 accurate.

[0128] Reference Figure 7 , Figure 9 , Figure 11 and Figure 12 According to some embodiments of the present invention, a module connecting plate 26 is provided near the mounting port 22 of the housing 2. The module connecting plate 26 includes a first connecting portion 261 extending in the vertical direction. The module fixing plate 133 includes a fixing plate body 1331 and a second connecting portion 1332. The fixing plate body 1331 is connected to the second module end plate 132. In the second direction, the second connecting portion 1332 is connected to the side of the fixing plate body 1331 near the second side wall 25. The second connecting portion 1332 and the first connecting portion 261 are connected by a second fastener 2611. The first connecting portion 261 and the second connecting portion 1332 have an angle with the first direction and the first connecting portion 261 and the second connecting portion 1332 have an angle with the second direction.

[0129] A module connecting plate 26 is provided near the mounting port 22 of the housing 2. The module connecting plate 26 includes a first connecting part 261. The module fixing plate 133 includes a fixing plate body 1331 and a second connecting part 1332. The fixing plate body 1331 is connected to the second module end plate 132, and the second connecting part 1332 is connected to the first connecting part 261 by a second fastener 2611. This makes the connection between the second module end plate 132 and the second side wall 25 simple and has strong stability. It can also realize the detachable connection between the second module end plate 132 and the second side wall 25.

[0130] By connecting the second connecting part 1332 in the second direction to the side of the fixing plate body 1331 near the second side wall 25, the space in the second direction can be fully utilized, making the distance between the second connecting part 1332 and the second side wall 25 closer. This can shorten the connection path between the second connecting part 1332 and the module connecting plate 26, reduce or avoid interference between the second connecting part 1332 and other components in the housing 2, and make the layout of the battery module 1 in the housing 2 more compact, reducing the overall space occupied by the battery module 1.

[0131] Furthermore, by having an angle between the first connecting part 261 and the second connecting part 1332 and the first direction, and an angle between the first connecting part 261 and the second connecting part 1332 and the second direction, the connection point of the first connecting part 261 and the second connecting part 1332 can decompose the external force on the battery module 1 into multiple directional components, such as decomposing the external force into the first direction and the second direction, rather than concentrating it in a single direction. Compared with the traditional single-direction force, this can effectively reduce the local stress concentration caused by unidirectional force at the connection point, reduce the possibility of fatigue fracture of the second fastener 2611, and effectively improve the connection strength and reliability between the first connecting part 261 and the second connecting part 1332.

[0132] In addition, by having an angle between the first connecting part 261 and the second connecting part 1332 and the first direction, and an angle between the first connecting part 261 and the second connecting part 1332 and the second direction, the axis of the second fastener 2611 can form a certain angle with the second side wall 25. The operator can use tools (such as wrenches, screwdrivers, etc.) to disassemble and assemble from the outside of the housing 2 at a more comfortable angle, avoiding the problem of limited operation caused by the need for tools to be inserted vertically into the housing 2 when connecting in a straight direction. For example, even when the mounting port 22 is partially blocked, the second fastener 2611 can still be installed and removed by tilting the angle, reducing the need for operating space and making the operation more convenient.

[0133] Reference Figure 13 and Figure 15 According to some embodiments of the present invention, the battery cell assembly 12a includes multiple rows of battery cells 12 arranged along a first direction. Each row of battery cells 12 includes multiple battery cells 121 arranged along a vertical direction. The battery cells 121 are square batteries and have two large surfaces 1211 arranged opposite each other along a vertical direction. The first direction intersects with the second direction.

[0134] It should be explained that the large surface 1211 of the battery cell 121 refers to the side surface with the largest area on the outer surface of the battery cell 121.

[0135] The battery cell assembly 12a includes multiple rows of battery bars 12 arranged along a first direction. Each row of battery bars 12 includes multiple battery cells 121 arranged in a vertical direction. The battery cells 121 are square batteries. By making full use of the two large surfaces 1211 of the square batteries arranged opposite each other in the vertical direction, the multiple battery cells 121 arranged in the vertical direction in each row of battery bars 12 are stacked relatively stably in the vertical direction. By arranging multiple battery cells 121 in the vertical direction and multiple rows of battery bars 12 in the first direction, the space in the vertical direction can be fully utilized to stack as many battery cells 121 as possible. In this way, with a fixed capacity of the housing 2, by arranging multiple battery cells 121 in the vertical direction, the housing 2 can accommodate as many battery cells 121 as possible, effectively improving the overall energy density of the battery device 100.

[0136] Furthermore, it also facilitates the placement of the module pressure plate 11 on both sides of the battery cell assembly 12a along the vertical direction, and the placement of the module end plate 13a on both sides of the battery cell assembly 12a along the first direction. While the battery cell 121 is assembled and pre-assembled into a whole by the module pressure plate 11 and the module end plate 13a, interference between the module pressure plate 11 and the module end plate 13a and the terminal post components of the battery cell 121 can be avoided.

[0137] In some embodiments, in the vertical direction, a first heat insulation member 1212 is provided between the large surfaces 1211 of at least two adjacent battery cells 121. The first heat insulation member 1212 can block the heat transfer between two adjacent battery cells 121, preventing the excessive heat of one battery cell 121 from interfering with the adjacent battery cells 121, which helps to reduce the possibility of thermal runaway. In addition, in the first direction, a second heat insulation member 123 is provided between two adjacent battery rows 12. The second heat insulation member 123 can block the heat transfer between two adjacent battery cells 121, preventing the excessive heat of one battery row 12 from interfering with the battery cells 121 of the adjacent battery rows 12, which helps to reduce the possibility of thermal runaway.

[0138] For example, the first heat insulation component 1212 and / or the second heat insulation component 123 use insulating heat insulation materials, such as aerogel and buffer foam integrated encapsulation. By providing the first heat insulation component 1212 between at least part of the large surface 1211 of two adjacent battery cells 121 and the second heat insulation component 123 between two adjacent battery packs 12, the possibility of electrical connection between adjacent battery cells 121 due to direct contact can be effectively avoided, and the thermal runaway suppression effect of the battery module 1 can also be better.

[0139] In some embodiments, a first heat insulation layer 135 is provided on the side of the module end plate 13a facing the battery cell assembly 12a, and a second heat insulation layer 136 is provided on the side of the module pressure plate 11 facing the battery cell assembly 12a. A first heat insulation member 1212 is provided between at least a portion of the large surfaces 1211 of two adjacent battery cells 121, extending along a first direction. A second heat insulation member 123 is provided between two adjacent battery packs 12, extending along a vertical direction. The first heat insulation member 1212 is provided between at least a portion of the large surfaces 1211 of two adjacent battery cells 121, extending along a first direction, and the second heat insulation member 123 is provided between two adjacent battery packs 12. To achieve internal heat insulation of the battery module 1, and with the first heat insulation layer 135 provided on the module end plate 13a along the first direction of the battery module 1 and the second heat insulation layer 136 provided on the module pressure plate 11 along the vertical direction of the battery cell assembly 12a, heat insulation between the battery module 1 and the outside of the battery module 1 can be achieved. The combination of internal heat insulation of the battery module 1 and external heat insulation of the battery module 1 can improve the thermal runaway suppression effect of the battery module 1. For example, the module end plate 13a and the first heat insulation layer 135 are pre-assembled into a whole, and the module pressure plate 11 and the second heat insulation layer 136 are pre-assembled into a whole. This can reduce the operation steps of installing individual components and improve the overall assembly efficiency of the battery device 100.

[0140] Reference Figure 13 and Figure 15 According to some embodiments of the present invention, the battery module 1 includes an integrated busbar 14, which is disposed on one side of the battery cell assembly 12a along a second direction. The battery cell assembly 12a is connected to at least one module connection bar 15, which is connected to the integrated busbar 14. A fuse 16 is connected between the at least one module connection bar 15 and the integrated busbar 14. Because the battery module 1 includes the integrated busbar 14, which is disposed on one side of the battery cell assembly 12a along a second direction and the battery cell assembly 12a is connected to at least one module connection bar 15, the integrated busbar 14 can connect to the battery cell assembly 12a. The terminal components of multiple battery cells 121 within the battery module 1 are connected, and then connected to the module connection bus 15. The module connection bus 15 is connected to a unified conductive carrier, forming a current flow channel from a single battery cell 121 to the module connection bus 15 via the integrated bus 14. The integrated bus 14 can integrate the electrical connection paths of multiple battery cells 121 and the module connection bus 15 into one, making the connection paths of multiple battery cells 121 and the module connection bus 15 more orderly and standardized. It can also simplify the connection lines of multiple battery cells 121 and the module connection bus 15, reducing the overall space occupied by complex connection lines.

[0141] Furthermore, by connecting at least one module connection bus 15 to the integrated bus 14 with a fuse 16, an overcurrent or short-circuit protection barrier can be formed at the battery module 1 level. This can effectively prevent damage to the circuit of the battery module 1 due to overcurrent, which is beneficial to protecting the circuit control of the battery module 1 or the integrated bus 14 and avoiding the problem of inconvenience in disassembly and assembly due to damage to the integrated bus 14. It also improves the multiple protection mechanisms of the battery device 100. For example, compared with traditional fuses, by providing a fuse 16 between the integrated bus 14 and at least one module connection bus 15, a fuse 16 can be provided at the output end of the battery module 1, making inspection and maintenance more convenient.

[0142] In addition, by integrating the busbar 14 on one side of the battery cell assembly 12a along the second direction, the traditional scattered wires and terminals can be replaced, reducing the space occupied by electrical components inside the module. This is conducive to optimizing the layout within the housing 2 of the battery device 100. For example, with a fixed capacity of the housing 2, by providing the integrated busbar 14, the space occupied by electrical components can be reduced, allowing for the placement of as many battery cells 121 as possible, which is beneficial to improving the energy density within the battery device 100.

[0143] The battery module 1 includes a terminal connection terminal 17, which is connected to the module connection bus 15. By connecting the terminal connection terminal 17 to the module connection bus 15, an electrical connection path can be established between the battery cell 121 via the integrated busbar 14, then via the module connection bus 15, and finally the terminal connection terminal 17. The terminal connection terminal 17 can serve as a unified electrical connection interface 232 between the battery cell 121 inside the battery module 1 and the outside of the battery module 1. For example, the terminal connection terminal 17 can be connected to the busbar inside the housing 2 or the wiring harness outside the housing 2, without directly exposing the module connection bus 15 or the integrated busbar 14. For instance, when the battery device 100 is used in the electrical device 1000, only the terminal connection terminal 17 needs to be plugged into and unplugged from the wiring harness outside the housing 2, avoiding complex wire welding or bolt fixing operations and significantly improving the overall assembly efficiency of the battery device 100.

[0144] For example, the battery device 100 includes a housing 2 and at least one battery module 1. The housing 2 has a mounting opening 22 on one side along a first direction, and a cover plate 23 is provided at the mounting opening 22. An interface 232 is formed on the cover plate 23 for connecting to PACK-level components outside the housing 2. The battery module 1 includes a module end plate 13a, a module pressure plate 11, and a battery cell assembly 12a. The module end plate 13a is disposed on both sides of the battery cell assembly 12a along the first direction, and the module pressure plate 11 is disposed on the upper and lower sides of the battery cell assembly 12a. The module pressure plate 11 and the module end plate 13a are connected by a third fastener 134. The battery module 1 includes an integrated busbar 14 and a terminal connection terminal 17. The integrated busbar 14 is disposed on the battery cell assembly 12a. Along one side of the second direction, the battery cell assembly 12a is connected to at least one module connection bar 15, which is connected to the integrated busbar 14. At least one module connection bar 15 is connected to the integrated busbar 14 with a fuse 16. The battery module 1 includes a terminal connection terminal 17, which is connected to the module connection bar 15. The battery module 1 can be prefabricated into a box 2 module similar to a PACK, and the reserved interface 232 facilitates the connection of the terminal connection terminal 17 to PACK-level components. This is beneficial to the sealing and protection capability of the battery module 1. The coordinated design with the PACK-level sealing and protection, heat insulation and insulation and module fuse 16 is beneficial to improving the overall reliability of the battery device 100.

[0145] Reference Figure 1 and Figure 19 The electrical device 1000 according to the second aspect of the present invention includes the battery device 100 according to the first aspect of the present invention.

[0146] Optionally, the electrical device 1000 can be a vehicle; for example, the battery device 100 can be located at the bottom of the vehicle body 200.

[0147] According to the embodiment of the present utility model, the electrical device 1000, by providing the above-mentioned battery device 100, makes it easier and more efficient to assemble the functional components in the battery module 1 of the battery device 100 with the battery cell assembly 12a, thereby improving the ease of assembly and efficiency of the electrical device 1000.

[0148] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0149] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0150] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0151] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0152] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0153] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: A battery module, comprising functional components and battery cell assemblies, wherein the functional components are disposed on at least one side of the battery cell assembly along a second direction, and the functional components include a heat insulation plate and a heating film, wherein the heating film is disposed on the side of the heat insulation plate facing the battery module and is thermally connected to the battery cell assembly.

2. The battery device according to claim 1, characterized in that, The battery cell assembly includes multiple rows of battery cells arranged along a first direction. Each row of battery cells includes multiple battery cells arranged in a vertical direction. The dimension of a single battery cell in the second direction is w1. The thickness of the heating film in the second direction is w2. The thickness of the heat insulation plate in the second direction is w3. The ratio of w2 to w1 ranges from 1:220 to 1:50; and / or the ratio of w3 to w1 ranges from 1:100 to 1:

20.

3. The battery device according to claim 2, characterized in that, In the vertical direction, a first heat insulation element is provided between at least two adjacent battery cells; The thickness of the first heat insulation component in the vertical direction is w4, and the thickness of a single battery cell in the vertical direction is w5. The ratio of w4 to w5 is in the range of 1:35 to 1:

5.

4. The battery device according to claim 2, characterized in that, In the first direction, a second heat insulation element is provided between two adjacent rows of battery bars; Wherein, the thickness of the second heat insulation component in the first direction is w6, the size of a single battery cell in the first direction is w7, and the ratio of w6 to w7 is in the range of 1:200 to 1:

25.

5. The battery device according to claim 1, characterized in that, The thickness of the heating film in the second direction is w2, and the thickness of the heat insulation plate in the second direction is w3. The ratio of w2 to w3 is in the range of 1:5 to 1:

1.

6. The battery device according to claim 1, characterized in that, The heating film is bonded and fixed to the heat insulation plate; or, the heating film is hot-pressed and fixed to the heat insulation plate.

7. The battery device according to claim 1, characterized in that, The battery module includes a module end plate and a module pressure plate. The module end plate is disposed on both sides of the battery cell assembly along a first direction, and the module pressure plate is disposed on the upper and lower sides of the battery cell assembly. The module pressure plate and the module end plate are connected by a third fastener. The first direction intersects with the second direction.

8. The battery device according to claim 7, characterized in that, The module end plate includes an end plate body and a first heat insulation layer, wherein the first heat insulation layer is located on the side of the end plate body facing the battery cell assembly; The first heat insulation layer is bonded and fixed to the end plate body; or, the first heat insulation layer is hot-pressed and fixed to the end plate body.

9. The battery device according to claim 7, characterized in that, The module pressure plate includes a pressure plate body and a second heat insulation layer, wherein the second heat insulation layer is located on the side of the pressure plate body facing the battery cell assembly; The second heat insulation layer is bonded and fixed to the pressure plate body; or, the second heat insulation layer is hot-pressed and fixed to the pressure plate body.

10. The battery device according to claim 1, characterized in that, Also includes: The enclosure has multiple mounting rails inside, which are located at the bottom of the enclosure and extend along a first direction. The multiple mounting rails are arranged along a second direction. The enclosure has an installation opening on one side along the first direction, and a cover plate is provided at the installation opening. The first direction, the second direction, and the up and down direction intersect each other. At least one battery module is disposed within the housing and supported on the mounting rail, the mounting rail being used to guide the battery module to slide along the first direction so that the battery module slides into or out of the housing.

11. The battery device according to claim 10, characterized in that, The multiple mounting rails are divided into at least one rail group, each rail group includes two mounting rails, and a single battery module corresponds to one rail group. Each of the mounting rails includes a support portion and a limiting portion. The support portion is connected to the bottom wall of the housing. The battery module is supported on the upper surface of the support portion. The limiting portion is connected to one side of the support portion along the second direction and protrudes upward from the support portion. The limiting portions of the two mounting rails in the rail group are located on both sides of the corresponding battery module along the second direction.

12. The battery device according to claim 10, characterized in that, The battery module includes a module pressure plate, which is disposed on the upper and lower sides of the battery cell assembly. The module pressure plate includes a pressure plate body and a module support boss. The module support boss is disposed on the side of the pressure plate body opposite to the battery cell assembly and extends along the first direction. The module support boss in the lower module pressure plate is supported by the mounting guide rail.

13. The battery device according to claim 12, characterized in that, A cavity is formed inside the module support boss, and the cavity extends along the first direction; The cavity has a plurality of heat dissipation holes arranged at intervals along the first direction, which penetrate the module support boss and / or the side of the module support boss away from the pressure plate body.

14. The battery device according to claim 10, characterized in that, The battery module includes a module end plate, which is disposed on both sides of the battery cell assembly along the first direction and connected to the housing.

15. The battery device according to claim 14, characterized in that, The enclosure includes a first side wall and two second side walls. The first side wall and the mounting opening are located on both sides of the enclosure along the first direction, and the two second side walls are connected to the first side wall on both sides along the second direction. The two module end plates located on both sides of the battery cell assembly along the first direction are the first module end plate and the second module end plate, respectively. The first module end plate is connected to the first sidewall by a first fastener. The second module end plate has a module fixing plate on the side near the mounting port, and the module fixing plate is connected to the housing.

16. The battery device according to claim 15, characterized in that, The housing is provided with a module connecting plate near the mounting port. The module connecting plate includes a first connecting part extending in the vertical direction. The module fixing plate includes a fixing plate body and a second connecting part. The fixing plate body is connected to the second module end plate. In the second direction, the second connecting part is connected to the side of the fixing plate body near the second side wall. The second connecting part and the first connecting part are connected by a second fastener. The first connecting part and the second connecting part have an angle with the first direction and an angle with the second direction.

17. The battery device according to claim 1, characterized in that, The battery cell assembly includes multiple rows of battery cells arranged along a first direction. Each row of battery cells includes multiple battery cells arranged in a vertical direction. Each battery cell is a square battery and has two large faces arranged opposite each other in a vertical direction. The first direction intersects with the second direction.

18. The battery device according to any one of claims 1-17, characterized in that, The battery module includes an integrated busbar, which is disposed on one side of the battery cell assembly along the second direction. The battery cell assembly is connected to at least one module connection bar, which is connected to the integrated busbar. Wherein, at least one of the module connection bars is connected to the integrated busbar with a fuse; and / or, the battery module includes a terminal connection terminal, which is connected to the module connection bar.

19. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-18.

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