Battery device and electric vehicle

Abstract

The present application provides a battery device and electric vehicle, relating to the field of battery technology. The battery device comprises a pole coil assembly, a first housing, a second housing, and a cell cover. The pole coil assembly comprises multiple pole coils, which are mounted side by side and have corresponding tabs disposed on top of the pole coils. The first housing nests the intermediate pole coils of the multiple pole coils. The second housing nests the multiple pole coils. The cell cover is fixedly mounted on top of the pole coils and is provided with pole posts, which are fitted into the tabs. This battery device can achieve the technical effect of improving battery life and safety.

Description

Technical Field

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

[0002] Currently, new energy vehicles (NEVs) use unconventional fuels as their power source (or conventional fuels with new onboard power units), integrating advanced technologies in vehicle power control and drive to create vehicles with advanced technical principles, new technologies, and new structures. One type of NEV utilizes power batteries, and the key to their power lies in their capacity. Battery pack space is extremely valuable, and battery manufacturers and OEMs strive to pack more battery capacity into limited space.

[0003] In the existing technology, as the energy density of batteries increases, battery cells are now made thicker and thicker, and the heat inside the battery cells is difficult to dissipate, thereby affecting the battery life and reducing the safety of the battery. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a battery device and an electric vehicle that can achieve the technical effect of improving battery life and safety.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising a pole winding assembly, a first shell, a second shell, and a cell cover;

[0006] The pole coil assembly includes a plurality of pole coils, the plurality of pole coils are installed side by side, and corresponding pole lug mechanisms are provided on the tops of the pole coils;

[0007] The first housing is nested to mount the middle pole coil of the plurality of pole coils;

[0008] The second housing is nested to install the plurality of pole coils;

[0009] The cell cover is fixedly mounted on the top of the pole coil, and the cell cover is provided with a pole, which is fitted with the pole tab mechanism.

[0010] In the above implementation process, the battery device is provided with a first shell and a second shell, wherein the middle part of the pole coil assembly is nested in the first shell, and the pole coil assembly is nested in the second shell, and finally the cell cover is fitted with the pole ear mechanism, so that the pole coil assembly, the first shell, and the second shell realize a cell structure similar to a Russian nesting doll; in this way, the internal heat of the cell pole coil can be transferred to the first shell and the second shell in sequence, and finally the internal heat of the cell pole coil is taken away, thereby avoiding overheating of the cell and achieving the technical effect of improving battery life and safety.

[0011] Furthermore, an electrolyte through hole is provided on the side or bottom of the first shell.

[0012] In the above implementation process, electrolyte through holes are provided on the side and bottom of the first shell to conduct the electrolyte, thereby adjusting the working temperature of the pole winding assembly.

[0013] Furthermore, the device further includes a water-cooling plate, which is connected to the electrolyte through-hole via a needle roller, and the water-cooling plate is fixedly mounted to the second shell.

[0014] Furthermore, the device also includes an insulating tape assembly, which includes a first insulating tape and a second insulating tape. Each pole roll of the middle part pole roll is fixedly installed by the first insulating tape, and the middle part pole roll and the first shell are fixedly installed by the second insulating tape.

[0015] Furthermore, the insulating tape assembly further includes a third insulating tape, and the plurality of pole coils and the first shell are fixedly mounted via the third insulating tape.

[0016] Furthermore, the second shell and the cell cover are sealed and connected by laser welding.

[0017] Furthermore, the surface of the first shell is an insulation-treated surface.

[0018] Furthermore, the device further includes a heat-conducting adhesive mechanism, and the bottom of the first shell and the bottom of the second shell are fixedly mounted via the heat-conducting adhesive mechanism.

[0019] Furthermore, the pole and the tab mechanism are mounted by laser welding or ultrasonic welding.

[0020] In a second aspect, an embodiment of the present application provides an electric vehicle comprising the battery device described in any one of the first aspects.

[0021] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the structure of a battery device provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the assembly structure of a battery device provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the assembly structure of the pole coil assembly and the battery cover provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of the pole coil assembly and battery cover provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the structure of the battery cell cover from a first viewing angle provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of the battery cell cover from a second viewing angle provided in an embodiment of the present application;

[0030] Figure 7 A schematic diagram of the assembly structure of the first housing and the pole coil assembly provided in an embodiment of the present application;

[0031] Figure 8 A schematic structural diagram of the first housing provided in an embodiment of the present application;

[0032] Figure 9 A schematic top view of the battery device according to an embodiment of the present application;

[0033] Figure 10 This is a schematic diagram of the cross-sectional structure of the battery device provided in an embodiment of the present application.

[0034] Icons: battery device 10; pole coil assembly 100; pole coil 110; first pole coil 111; second pole coil 112; third pole coil 113; fourth pole coil 114; pole lug mechanism 120; first shell 210; electrolyte through hole 211; side 212; bottom 213; second shell 220; cell cover 300; pole post 310. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0036] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0037] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0038] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or point connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0039] Furthermore, the terms "first," "second," and the like are primarily used to distinguish different devices, elements, or components (which may or may not be the same in type and configuration) and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0040] The embodiments of the present application provide a battery device and an electric vehicle, which can be used to improve the performance of power batteries. The battery device is provided with a first shell and a second shell, wherein the first shell is nested to install the middle part of the pole coil assembly, and the second shell is nested to install the pole coil assembly, and finally the battery cell cover is fitted with the pole ear mechanism, so that the pole coil assembly, the first shell, and the second shell realize a battery cell structure similar to a Russian nesting doll. In this way, the internal heat of the battery cell pole coil can be transferred to the first shell and the second shell in sequence, and finally the internal heat of the battery cell pole coil is taken away, thereby avoiding overheating of the battery cell and achieving the technical effect of improving battery life and safety.

[0041] See Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of the battery device provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the assembly structure of the battery device provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the assembly structure of the pole coil assembly and the battery cover provided in the embodiment of the present application. Figure 4 This is a structural schematic diagram of the pole winding assembly and battery cover provided in an embodiment of the present application; the battery device 10 includes a pole winding assembly 100, a first shell 210, a second shell 220 and a battery cover 300.

[0042] Exemplarily, the pole coil assembly 100 includes a plurality of pole coils 110 , which are installed side by side. Corresponding pole lug mechanisms 120 are provided on the tops of the pole coils 110 .

[0043] Exemplarily, a plurality of pole coils 110 are installed in sequence side by side, and a corresponding pole lug mechanism 120 is provided on the top of each pole coil 110 .

[0044] Illustratively, the first housing 210 nests and mounts the middle pole rolls 110 of the plurality of pole rolls 110 .

[0045] Illustratively, the second housing 220 is configured to nest and mount a plurality of pole rolls 110 .

[0046] In some embodiments, as Figures 1 to 3 As shown, the pole coil assembly 100 includes four pole coils 110, and the two middle pole coils 110 are nested and installed by the first shell 210; the entire four pole coils 110 are nested and installed by the second shell 220; thus, the first shell 210 becomes the inner shell, and the second shell 220 becomes the outer shell, and the pole coil assembly 100, the first shell 210 and the second shell 220 form a battery cell structure similar to a Russian nesting doll.

[0047] Illustratively, the battery device is provided with a first shell 210 and a second shell 220, wherein the first shell 210 is nested to install the middle part of the pole coil 110 of the pole coil assembly 100, and then the second shell 220 is nested to install the pole coil assembly 100, and finally the battery cell cover 300 is fitted with the pole ear mechanism 120, so that the pole coil assembly 100, the first shell 210, and the second shell 220 realize a battery cell structure similar to a Russian nesting doll; in this way, the internal heat of the battery cell pole coil can be transferred to the first shell and the second shell in sequence, and finally the internal heat of the battery cell pole coil is taken away, thereby avoiding overheating of the battery cell and achieving the technical effect of improving battery life and safety.

[0048] See Figure 5 Figure 6 , Figure 5 This is a schematic diagram of the structure of the battery cover from the first perspective provided in an embodiment of the present application. Figure 6 This is a schematic structural diagram of the battery cell cover from a second viewing angle provided in an embodiment of the present application.

[0049] Illustratively, the cell cover 300 is fixedly mounted on the top of the pole coil 110 . The cell cover 300 is provided with a pole post 310 . The pole post 310 is mounted in contact with the pole tab mechanism 120 .

[0050] For example, by fitting the pole 310 and the pole tab mechanism 120 together, the stored electrical energy in the pole winding assembly 100 is extracted and transmitted to other mechanisms.

[0051] See Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the assembly structure of the first housing and the pole winding assembly provided in an embodiment of the present application. Figure 8 This is a schematic structural diagram of the first shell provided in an embodiment of the present application.

[0052] Exemplarily, an electrolyte through hole 211 is provided on a side or bottom of the first housing 210 .

[0053] For example, electrolyte through holes 211 are provided on the side surface 212 and the bottom 213 of the first housing 210 to conduct electrolyte, thereby adjusting the operating temperature of the pole winding assembly 100 .

[0054] In some embodiments, as Figure 7 As shown, the pole coil assembly 100 includes a first pole coil 111, a second pole coil 112, a third pole coil 113, and a fourth pole coil 114. The first pole coil 111, the second pole coil 112, the third pole coil 113, and the fourth pole coil 114 are arranged side by side. The middle part of the pole coil (the second pole coil 112 and the third pole coil 113) of the pole coil assembly 110 is nested and installed by the first shell, and then the entire pole coil assembly 100 is nested and installed by the second shell 220.

[0055] Illustratively, the battery device 10 further includes a water-cooling plate, which is connected to the electrolyte through-hole 211 via a winding needle, and the water-cooling plate is fixedly mounted to the second shell 220 .

[0056] Exemplarily, the battery device 10 also includes an insulating tape assembly, which includes a first insulating tape and a second insulating tape. Each pole roll 110 of the middle pole roll is fixedly installed by the first insulating tape, and the middle pole roll and the first shell 210 are fixedly installed by the second insulating tape.

[0057] Exemplarily, the insulation tape assembly further includes a third insulation tape, and the plurality of pole coils 110 and the first housing 210 are fixedly mounted via the third insulation tape.

[0058] In some embodiments, the first insulating tape, the second insulating tape, and the third insulating tape are all high-temperature insulating tapes; Figure 7 As shown, the second pole roll 112 and the third pole roll 113 are wound together by a first insulating tape, and then the second pole roll 112, the third pole roll 113 and the first shell 210 are wound together by a second insulating tape, and then the entire pole roll assembly and the first shell 210 are wound together by a third insulating tape.

[0059] Illustratively, the second housing 220 and the cell cover plate 300 are sealed and connected by laser welding.

[0060] Exemplarily, the surface of the first shell 210 is an insulation-treated surface.

[0061] See Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the top view of the battery device provided in an embodiment of the present application. Figure 10 This is a schematic cross-sectional view of a battery device according to an embodiment of the present application. Figure 10 and Figure 9 The shown section corresponds to AA.

[0062] Exemplarily, the battery device 10 further includes a thermally conductive adhesive mechanism, and the bottom of the first shell 210 and the bottom of the second shell 220 are fixedly mounted by the thermally conductive adhesive mechanism.

[0063] Exemplarily, the pole 310 and the tab structure 120 are mounted by laser welding or ultrasonic welding.

[0064] For example, an embodiment of the present application provides an electric vehicle, including: Figures 1 to 8 The battery device 10 is shown.

[0065] In some implementation scenarios, an embodiment of the present application provides a battery device 10, which is a Russian doll battery cell; optionally, the inner and outer surfaces of the first shell 210 need to be anodized, hard anodized, or subjected to other insulation treatments, and the bottom surface of the first shell 210 and the bottom of the second shell 220 are connected together by gluing with thermally conductive glue or laser welding or other connection methods. The electrolyte through-holes 211 provided on the side 212 and bottom 213 of the first shell 210 are used to conduct the electrolyte of the water-cooled plate.

[0066] For example, after the pole winding assembly 100 is installed in the second shell 220, the battery cell cover plate 300 is laser welded and sealed to the second shell 220; the bottom surface of the first shell 210 and the bottom of the second shell 220 are connected together by gluing with thermal conductive glue or laser welding or other connection methods, so that the heat inside the pole winding assembly 100 can be transferred to the shell through the winding needle, and then transferred from the shell to the water cooling plate, and then the heat is taken away by the liquid in the water cooling plate.

[0067] In all embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms will not be elaborated in the embodiments of the present application.

[0068] It should be understood that the phrases “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0069] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0070] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A battery device, characterized in that: It includes a pole winding assembly, a first shell, a second shell and a battery cover; The pole coil assembly includes a plurality of pole coils, the plurality of pole coils are installed side by side, and corresponding pole lug mechanisms are provided on the tops of the pole coils; The first housing is nested to mount the middle pole coil of the plurality of pole coils; The second housing is nested to install the plurality of pole coils; The cell cover is fixedly mounted on the top of the pole coil, and the cell cover is provided with a pole, which is fitted with the pole tab mechanism; An electrolyte through hole is provided on the side or bottom of the first shell; The device further includes a water-cooling plate, the water-cooling plate being connected to the electrolyte through-hole via a needle roller, and the water-cooling plate being fixedly mounted to the second housing; The device further comprises a heat-conducting adhesive mechanism, and the bottom of the first shell and the bottom of the second shell are fixedly mounted via the heat-conducting adhesive mechanism.

2. The battery device according to claim 1, wherein: The device also includes an insulating tape assembly, which includes a first insulating tape and a second insulating tape. Each pole coil of the middle portion pole coil is fixedly installed by the first insulating tape, and the middle portion pole coil and the first shell are fixedly installed by the second insulating tape.

3. The battery device according to claim 2, characterized in that The insulating tape assembly further includes a third insulating tape, and the plurality of pole coils and the first shell are fixedly mounted via the third insulating tape.

4. The battery device according to claim 1, wherein: The second shell and the cell cover are sealed and connected by laser welding.

5. The battery device according to claim 1, wherein: The surface of the first shell is an insulation-treated surface.

6. The battery device according to claim 1, wherein: The pole and the tab mechanism are mounted by laser welding or ultrasonic welding.

7. An electric vehicle, characterized in that: Comprising the battery device according to any one of claims 1 to 6.

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