800V-level sodium-nickel battery energy storage device
By designing a 800V-level sodium-nickel battery energy storage device, the series-parallel and closed structure of the battery module is used to solve the problems of large volume, difficult temperature regulation and low energy density in the prior art energy storage device, and a compact structure and efficient temperature regulation are achieved.
Patent Information
- Application Number
- CN202420950672.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-06
AI Technical Summary
The existing sodium salt battery energy storage device obtains high voltage levels through a combination of multiple low-voltage batteries, resulting in large equipment size, difficult temperature regulation and lower specific energy density.
A 800V-level sodium-nickel battery energy storage device is designed. Through multiple battery modules connected in series and parallel, the enclosed structure of the case, the battery module and the base is used, and the fixing method of the connecting piece and the module partition is combined to achieve a compact structure and unified temperature regulation.
The energy storage device is compact in structure, high in specific energy density and convenient in temperature regulation, and solves the problems of large equipment size, difficult in temperature regulation and low in specific energy density in the prior art.
Smart Images
Figure CN222637508U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of high-temperature sodium battery assembly, and in particular relates to an 800V-level sodium-nickel battery energy storage device. Background Art
[0002] Sodium salt batteries have unique advantages in energy storage systems due to their unique safety, reliability, wide operating temperature window, and high specific energy.
[0003] The voltage levels of sodium salt battery packs currently on the market are generally 48V and 72V. In applications that require greater power and energy density, multiple low-voltage batteries need to be connected in series or parallel, and then the step-up and step-down modules are used to achieve the predetermined high voltage level. The problems are: first, the combination of multiple low-voltage batteries makes the energy storage device bulky and inconvenient to move; second, the sodium salt battery is a high-temperature battery, and each low-voltage battery after the combination needs to be individually insulated, which makes it difficult to accurately control the temperature, and the control steps are cumbersome; third, the energy storage device composed of the combination has a lower specific energy density under the same energy storage conditions.
[0004] Based on the above analysis, this application designs a sodium-nickel energy storage device with a voltage level of 800V. Summary of the invention
[0005] The purpose of the utility model is to provide an 800V-level sodium-nickel battery energy storage device, which is a high-voltage energy storage device composed of multiple battery modules connected in series and parallel. Compared with the existing energy storage structure of the same level composed of multiple low-voltage batteries, the energy storage device of this structure has the advantages of compact structure, large specific energy density and convenient unified temperature control, etc., which solves the shortcomings of the existing high-voltage energy storage device obtained by using multiple low-voltage batteries.
[0006] In order to solve the above problems, the present application provides an 800V-level sodium-nickel battery energy storage device, including a casing, a battery module and a base, wherein the casing is a cover structure with an opening at the bottom, and the casing can be connected to the base to form a closed accommodating chamber for accommodating the battery module; the battery module includes multiple modules, and a module partition is provided between at least two adjacent battery modules, the bottom of the module partition can be fixed on the base, and the size of the module partition corresponds to the side size of the battery module, and at the same time, each of the battery modules is respectively provided with a connecting piece extending to the outside thereof, and the connecting piece can be connected to the module partition at the corresponding position to realize the fixation of multiple battery modules after being connected in series and parallel; the base at least includes a vibration-damping bottom shell and a bottom plate, and the bottom plate is fixed to the upper end of the vibration-damping bottom shell for fixing and receiving the battery module.
[0007] As a preferred solution of the present application, the connecting plate is a tooth plate, which extends to the outside of the battery module, and a locking hole is provided on the structure where the tooth plate extends to the outside of the battery module. The tooth plates on two adjacent battery modules are staggered and docked in the horizontal direction. At the same time, the locking hole on the tooth plate can be located on the same module partition. The locking hole cooperates with the locking piece to fix the two adjacent battery modules on the same module partition, thereby realizing the locking of the battery module in the vertical direction.
[0008] As a preferred solution of the present application, the vibration-damping bottom shell includes a bottom shell, a vibration-damping grid and a bottom sealing plate. The vibration-damping grid is fixed on the bottom shell and is located between the bottom shell and the bottom sealing plate.
[0009] As a preferred solution of the present application, the vibration-damping grid is composed of a plurality of tubes staggered together, and the tube wall thickness of the tube is not less than 3 mm.
[0010] As a preferred solution of the present application, the shell comprises an inner shell and an outer shell, the outer shell is larger than the inner shell, and a buffer insulation layer is filled between the inner and outer shells and between the bottom sealing plate and the bottom plate.
[0011] As a preferred solution of the present application, the buffer thermal insulation layer comprises at least two layers, and the constituent material of the buffer thermal insulation layer is a low thermal conductivity material with a thermal conductivity coefficient of less than 0.024 W / (m·k) and a certain buffer elasticity.
[0012] As a preferred solution of the present application, the inner shell and the bottom plate are interference fit, and a thermal insulation layer is provided on the contact surface between the inner shell and the bottom plate.
[0013] As a preferred solution of the present application, the battery module comprises an insulating shell, a plurality of battery cells and a heating plate, the insulating shell is wrapped around the outer circumference of the plurality of battery cells, and the heating plate is vertically inserted between two adjacent battery cells of the battery module.
[0014] As a preferred solution of the present application, the module partition is a hollow cavity structure, and a bellows for circulating coolant is arranged in the hollow cavity.
[0015] As a preferred solution of the present application, the vibration-damping bottom shell and the bottom plate are respectively provided with corresponding wire outlet holes, through which the wire harness located in the housing can be led out.
[0016] Compared with the prior art, the advantages of the 800V sodium-nickel battery energy storage device of the present application are:
[0017] The energy storage device of the present application comprises a casing, a battery module and a base, wherein the battery modules comprise a plurality of battery modules, which are connected in series and parallel and fixed in a closed accommodation cavity formed by the casing and the base to form an 800V-level sodium-nickel battery energy storage device, wherein the battery modules are orderly and tightly connected and fixed in the closed accommodation cavity by the cooperation of a connecting sheet and a module partition, thereby reducing the volume of the energy storage device and improving its specific energy density. In addition, the base is configured as a vibration reduction structure, thereby enhancing the strength of the energy storage device and improving its service life. It can be seen that the 800V-level sodium-nickel battery energy storage device of the present application has the advantages of compact structure, large specific energy density and convenient unified temperature control compared with the existing energy storage structure of the same level composed of multiple low-voltage batteries, and has certain market value. At the same time, it solves the shortcomings of the existing energy storage device when obtaining the required high-voltage level through multiple low-voltage batteries. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the overall exploded structure of the 800V-level sodium-nickel battery energy storage device provided by the utility model.
[0019] Figure 2 This is a schematic diagram of the installation of the battery module 002 provided by the utility model on the base.
[0020] Figure 3 This is a schematic diagram of the structure of the battery module 002 provided by the utility model.
[0021] Figure 4 This is a structural schematic diagram of two adjacent battery modules 002 provided by the utility model being connected via a connecting piece.
[0022] Figure 5 This is a cross-sectional view of the sodium-nickel energy storage device provided by the utility model.
[0023] Figure 6 The utility model provides Figure 5 The partial enlargement of point A in the middle shows the bottom sealing intention.
[0024] Reference numerals
[0025] Outer jacket 100; outer shell ear 101; bottom outer shell 103; vibration damping grid 104; bottom sealing plate 105; outer buffer insulation layer 106; inner buffer insulation layer 107; bottom plate 108; wire outlet hole 110; inner shell 111; thermal insulation layer 112; battery module 002, module partition 200; module upper cover 201; module front cover 202; module bottom cover 203; tube bundle, wire harness 204; module rear cover 205; module upper insulation plate 206; heating plate 207; module side cover 208; module side insulation plate 209; module front insulation plate 210; tooth plate 211, locking hole 212. DETAILED DESCRIPTION
[0026] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.
[0027] like Figure 1-2 As shown, it is a schematic diagram of the structure of an 800V-level sodium-nickel battery energy storage device provided in this embodiment. The energy storage device includes a casing, a battery module 002 and a base. The casing is a cover structure with an opening at the bottom. The casing can be made of one of the materials such as SPCC, SGCC, SUS304, SUS316, etc., and the thickness is not less than 1-3mm. The casing can be connected to the base to form a closed accommodating cavity for accommodating the battery module 002. It can be understood that the casing and the base can be connected by bolts or welding, etc., which can be selected according to actual needs; the battery module 002 includes multiple, and in this embodiment, each battery module 002 includes an insulating shell, multiple battery cells and a heating plate 207, as shown in FIG. Figure 3As shown, the insulating shell is wrapped around the periphery of multiple battery cells to form a rectangular body structure, and the insulating shell includes a module cover plate and a module insulating plate. The module insulating plate is arranged between the battery cell and the module cover plate. In this embodiment, the module cover plate includes a module upper cover plate 201, a module bottom cover plate 203, a module front cover plate 202, a module rear cover plate 205 and a module side cover plate 208. The covers are fixed by welding. It can be understood that the number and layout positions of the module insulating plates may correspond to the module cover plates or may not correspond. In this embodiment, the module insulating plate preferably includes a module upper insulating plate 206, a module side insulating plate 209 and a module front insulating plate 210. The insulating shell of this structure can connect each battery cell The body is effectively isolated from the outside world to avoid leakage or short circuit; the heating plate 207 is used to heat the battery module 002 to meet the required operating temperature of the sodium-nickel battery. The heating plate 207 is vertically inserted between two adjacent battery cells in the middle position of the battery module 002. It can be understood that an insulating layer should be provided between each adjacent battery cell of the battery module 002. The heating plate 207 is arranged between the two insulating layers. The thickness of the insulating layer is preferably about 0.5 mm. Compared with the existing traditional method of horizontally arranging the heating plate 207 on the top of the battery cell for heating, the heating method of inserting the heating plate 207 in the battery module 002 in this embodiment can improve the heating efficiency of the battery module 002. Speed, to meet the demand of 800V grade energy storage device for strict heating speed due to its large volume. In this embodiment, the heating plate 207 of each battery module 002 is controlled separately, so as to balance the overall temperature of the energy storage device and maintain the temperature consistency <35°C; at least one module partition 200 is provided between two adjacent battery modules 002, the bottom of which can be fixed on the base by welding or the like, and the size of the module partition 200 corresponds to the side size of the battery module 002. At the same time, each battery module 002 is provided with a connecting piece extending to the outside thereof, which can be connected to the module partition 200 at the corresponding position to realize the series and parallel connection of multiple battery modules 002 After fixation, in this embodiment, the connecting piece is arranged at any position of the insulating shell of the battery module 002. In this embodiment, it is preferably arranged on the module upper cover plate 201 of the insulating shell, which is convenient for installation; the base at least includes a vibration-damping bottom shell and a bottom plate 108. The size of the vibration-damping bottom shell is larger than that of the bottom plate 108. The bottom plate 108 is fixed to the upper end of the vibration-damping bottom shell for fixing and receiving the battery module 002. Due to the large volume of the 800V battery energy storage device, designing the base as a vibration-damping structure can effectively improve the strength of the energy storage device. In this embodiment, the constituent material of the base can be one of SPCC, SGCC, SUS304, SUS316 and the like, with a thickness of not less than 1.5 mm.
[0028] The connecting piece is a tooth piece 211, which extends to the outside of the battery module 002, and a locking hole 212 is provided on the structure where the tooth piece 211 extends to the outside of the battery module 002. The tooth pieces 211 on two adjacent battery modules 002 are staggered and docked in the horizontal direction. The staggered arrangement can reduce the distance between the two adjacent battery modules 002. At the same time, the locking holes 212 on the tooth piece 211 can be located on the same module partition 200, such as Figure 4 As shown, the locking hole 212 cooperates with the locking piece to fix two adjacent battery modules 002 on the same module partition 200, thereby locking the battery module 002 in the vertical direction. It can be seen that the present embodiment adopts the cooperation of the tooth plate 211 and the module partition 200, which can not only fix each battery module 002 in the horizontal and vertical directions and improve the stability of the battery module 002, but also ensure that the battery modules 002 are arranged in an orderly and tight manner, reduce the space occupied by the battery module 002, and thus reduce the volume of the battery energy storage device; it can be understood that the specific structure of the tooth plate 211 can be any shape such as trapezoid, rectangle, triangle, circle, etc.
[0029] The vibration-damping bottom shell includes a bottom shell 103, a vibration-damping grid 104 and a bottom sealing plate 105. The vibration-damping grid is fixed to the bottom shell 103 by bolts or welding, and is located between the bottom shell 103 and the bottom sealing plate 105. That is, in this embodiment, the bottom shell 103 and the bottom sealing plate 105 can form a cavity for storing the vibration-damping grid 104; in this embodiment, the vibration-damping grid is composed of a plurality of tubes staggered together, and the staggered manner can be that the tubes are arranged vertically in the horizontal and vertical directions, or they can be arranged crosswise at a certain angle. When they are arranged vertically in the horizontal and vertical directions, the spacing between two adjacent tubes should be greater than or equal to 150 mm and less than or equal to 500 mm; when they are arranged crosswise at a certain angle, the intersection angle α of the two tubes should be greater than or equal to 15° and less than or equal to 60°. The tube body is preferably a rectangular structure, and the tube wall thickness is not less than 3 mm. The bottom shell using this structure can not only improve the vibration resistance of the energy storage device, but also reduce its weight.
[0030] The shell includes an inner shell 111 and an outer shell 100. The size of the outer shell 100 is larger than that of the inner shell 111. At the same time, the thickness of the outer shell 100 should be no less than 1.5 mm, and the thickness of the inner shell 111 should be no less than 1 mm. A buffer insulation layer is filled between the inner and outer shells 100 and between the bottom sealing plate 105 and the bottom plate 108. The buffer insulation layer can effectively block heat diffusion, enhance the thermal insulation function, and ensure the normal operation of the battery energy storage device at the required temperature.
[0031] The buffer insulation layer is made of a low thermal conductivity material with a thermal conductivity coefficient of <0.024W / (m·k) and a certain buffer elasticity. The low thermal conductivity material can be ceramic fiber wool, glass fiber wool, fumed silica nanoplate, aerogel plate, etc. The specific requirement for buffer elasticity is that the compression resistance of the material at 10% deformation is ≥10Mpa. In this embodiment, the buffer insulation layer is provided with two layers, namely an outer buffer insulation layer 106 and an inner buffer insulation layer 107. The two buffer insulation layers are superimposed and filled in corresponding positions to further enhance the buffer insulation effect.
[0032] In this embodiment, the outer shell 100 can be covered on the outside of the inner shell 111, and the inner shell 111 is fixed on the bottom plate 108 and connected to the bottom plate 108 by interference fit, so that the sealing of the inner shell 111 can be increased. The outer shell 100 is fixed to the vibration-damping bottom shell by welding or the like; in this embodiment, in order to prevent heat from being transferred to the outer shell 100, a thermal insulation layer 112 is preferably provided on the contact surface between the inner shell 111 and the bottom plate 108, such as Figure 5-6 As shown, the thermal insulation layer 112 can be made of a material with high reflectivity and low thermal conductivity, and can be specifically a composite of one or more of aluminum foil, silver, nickel, glass fiber, asbestos, rock wool, aerogel felt, nano vacuum board, etc. The thermal insulation layer 112 can block heat transfer and improve the thermal insulation effect of the inner shell 111.
[0033] In this embodiment, in order to facilitate movement, a shell hanging ear 101 is preferably provided on the outer shell 100, and the tensile strength of the shell hanging ear 101 is greater than 100 MPa and the thickness is not less than 1.5 mm.
[0034] Corresponding wire outlet holes 110 are respectively provided on the vibration-damping bottom shell and the bottom plate 108, through which the wire harness 204 located in the casing can be led out, and the aperture of the wire outlet hole 110 is not less than 10 mm; in this embodiment, the wire harness 204 can be a temperature collection wire harness 204, a heating wire harness 204 and a polarity wire harness 204 of the battery module 002; when the energy storage device is assembled, each wire harness 204 can be led out to the outside of the energy storage device through the wire outlet hole 110 to be connected to the corresponding battery management mechanism. The use of the wire outlet hole 110 facilitates the orderly leading out of the wire harness 204, avoiding problems such as subsequent wiring abnormalities caused by the clutter of the wire harness 204.
[0035] In summary, the energy storage device of this embodiment includes a casing, a battery module 002 and a base, wherein the battery module 002 includes a plurality of battery modules, which are connected in series and parallel and fixed in a closed accommodation cavity formed by the casing and the base to form an 800V-level sodium-nickel battery energy storage device, wherein the battery modules 002 are orderly and tightly connected and fixed in the closed accommodation cavity by the cooperation of the connecting sheet and the module partition 200, thereby reducing the volume of the energy storage device and improving its specific energy density. In addition, the base is configured as a vibration reduction structure, thereby enhancing the strength of the energy storage device and improving its service life. Compared with the existing energy storage structure of the same level composed of multiple low-voltage batteries, the energy storage device of this structure has the advantages of compact structure, large specific energy density and convenient unified temperature control, and has certain market value. At the same time, it solves the shortcomings of the existing energy storage device when obtaining the required high-voltage level through multiple low-voltage batteries.
[0036] As a preferred embodiment of the present application, the module partition 200 is a hollow cavity structure, and a bellows (not shown in the figure) is arranged in the hollow cavity for the circulation of coolant, that is, in addition to being used to fix the battery module 002, the module partition 200 also has a cooling function, which is convenient for the subsequent heat dissipation of the battery energy storage device; it can be understood that the end tube bundle 204 of the bellows arranged on the module partition 200 should be led out to the outside through the outlet hole 110 so as to be connected to the coolant system. In this embodiment, the specific arrangement of the bellows in the hollow cavity can be set according to actual needs, and is specifically determined according to the actual cooling requirements, and this embodiment will not be repeated here.
[0037] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several improvements can be made without departing from the premise of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. An 800V sodium-nickel battery energy storage device, characterized in that: The invention comprises a casing, a battery module and a base, wherein the casing is a cover structure with an opening at the bottom, and the casing can be connected with the base to form a closed accommodating chamber for accommodating the battery module; the battery module comprises a plurality of modules, and a module partition is provided between at least two adjacent battery modules, the bottom of the module partition can be fixed on the base, and the size of the module partition corresponds to the side size of the battery module, and at the same time, each battery module is respectively provided with a connecting piece extending to the outside thereof, and the connecting piece can be connected with the module partition at the corresponding position to realize the fixing of the plurality of battery modules after being connected in series and parallel; The base at least includes a vibration-damping bottom shell and a bottom plate, and the bottom plate is fixed to the upper end of the vibration-damping bottom shell for fixing and receiving the battery module.
2. The 800V sodium-nickel battery energy storage device according to claim 1, characterized in that: The connecting plate is a tooth plate, which extends to the outside of the battery module, and a locking hole is provided on the structure where the tooth plate extends to the outside of the battery module. The tooth plates on two adjacent battery modules are staggered and docked in the horizontal direction. At the same time, the locking hole on the tooth plate can be located on the same module partition. The locking hole cooperates with the locking piece to fix the two adjacent battery modules on the same module partition, thereby realizing the locking of the battery module in the vertical direction.
3. The 800V sodium-nickel battery energy storage device according to claim 1, characterized in that: The vibration-damping bottom shell comprises a bottom shell, a vibration-damping grid and a bottom sealing plate. The vibration-damping grid is fixed on the bottom shell and is located between the bottom shell and the bottom sealing plate.
4. The 800V sodium-nickel battery energy storage device according to claim 3, characterized in that: The vibration-damping grid is formed by staggered combination of multiple tubes, and the tube wall thickness of the tube is not less than 3 mm.
5. The 800V sodium-nickel battery energy storage device according to claim 3, characterized in that: The casing comprises an inner casing and an outer casing, the outer casing is larger than the inner casing, and a buffer heat-insulating layer is filled between the inner and outer casings and between the bottom sealing plate and the bottom plate.
6. The 800V sodium-nickel battery energy storage device according to claim 5, characterized in that: The buffer heat insulation layer comprises at least two layers, and the constituent material of the buffer heat insulation layer is a low thermal conductivity material with a thermal conductivity coefficient of less than 0.024 W / (m·k) and certain buffer elasticity.
7. The 800V sodium-nickel battery energy storage device according to claim 5, characterized in that: The inner shell and the bottom plate are interference fit, and a heat insulation layer is provided on the contact surface between the inner shell and the bottom plate.
8. The 800V sodium-nickel battery energy storage device according to claim 1, characterized in that: The battery module comprises an insulating shell, a plurality of battery cells and a heating plate. The insulating shell is wrapped around the outer circumference of the plurality of battery cells, and the heating plate is vertically inserted between two adjacent battery cells of the battery module.
9. The 800V sodium-nickel battery energy storage device according to claim 1, characterized in that: The module partition is a hollow cavity structure, and a bellows for circulating coolant is arranged in the hollow cavity.
10. The 800V sodium-nickel battery energy storage device according to claim 1, characterized in that: The vibration-damping bottom shell and the bottom plate are respectively provided with corresponding wire outlet holes, through which the wire harness in the housing can be led out.