Sodium ion vehicle start-stop battery

Abstract

The sodium ion vehicle start-stop battery comprises a shell and a battery module installed in the shell, and the shell comprises a bottom shell and an upper cover which are connected through a buckle structure; a heat insulation layer is arranged between the inner wall of the bottom shell and the battery module, the shape of the heat insulation layer is matched with that of the inner cavity of the bottom shell, and the heat insulation layer can be in contact with the inner wall of the base; and a fixing rib position protruding out of the surface of the inner wall of the bottom shell is fixedly installed in the bottom shell and used for positioning the battery module, and a receding groove allowing the fixing rib position to be inserted is formed in the heat insulation layer. Under the condition that the battery module is convenient to disassemble and overhaul, the heat insulation layer does not influence heat dissipation of the heat insulation layer, so that the heat dissipation performance and the heat insulation effect are balanced, and the overhaul of the battery is not influenced.

Description

Technical Field

[0001] This application relates to the field of sodium-ion battery technology, specifically to a sodium-ion vehicle start-stop battery. Background Technology

[0002] Traditional lead-acid batteries pose an environmental challenge due to their heavy weight, as they may release harmful substances during production and disposal, leading to pollution. Furthermore, lead-acid batteries have a relatively high self-discharge rate, reducing their lifespan and efficiency. Sodium-ion batteries, as an environmentally friendly and resource-rich alternative, have received widespread attention in recent years. Compared to lead-acid batteries, sodium-ion batteries reduce reliance on lead resources, and sodium resources are abundant, resulting in a smaller environmental impact. However, despite these advantages, sodium-ion batteries still face some technical challenges in practical applications.

[0003] Current sodium-ion battery designs often employ thermal insulation materials to prevent thermal runaway and protect the battery. However, these materials are typically tightly integrated with the battery module structure, which limits the ease of disassembly and maintenance. If the battery requires maintenance or replacement, the entire module may need to be disassembled, increasing maintenance costs and complexity. Furthermore, the application of thermal insulation materials can affect the battery's heat dissipation performance, while efficient heat dissipation is crucial for maintaining stable battery operation and extending its lifespan. Existing thermal insulation measures often struggle to find an ideal balance between ensuring safety and optimizing heat dissipation.

[0004] On the other hand, to achieve waterproofing and dustproofing, sodium-ion batteries typically employ a sealed casing design to ensure stable operation under various environmental conditions. However, while this sealed design is effective, it sacrifices the battery's removability, making it relatively difficult to perform component upgrades or troubleshooting. Utility Model Content

[0005] Therefore, this application provides a sodium-ion vehicle start-stop battery to solve the problems of difficulty in balancing heat insulation and heat dissipation in the prior art, and the fact that the heat insulation structure and sealing structure can easily affect battery disassembly.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A sodium-ion vehicle start-stop battery includes a housing and a battery module installed inside the housing. The housing includes a bottom shell and a top cover connected by a snap-fit ​​structure. A heat insulation layer is provided between the inner wall of the bottom shell and the battery module. The shape of the heat insulation layer is adapted to the inner cavity of the bottom shell and can contact the inner wall of the base.

[0008] The bottom shell has a fixed rib protruding from the inner wall surface, which is used to position the battery module. The heat insulation layer has a clearance groove for the fixed rib to be inserted.

[0009] Optionally, the insulation layer is made of polypropylene microporous foam material.

[0010] Optionally, the bottom surface of the top cover is provided with a ring of glue-applying grooves, the position of which corresponds to the upper end of the bottom shell.

[0011] Optionally, the battery module includes a core assembly, a front connecting plate disposed in front of the core assembly, and a rear connecting plate disposed behind the core assembly. An epoxy resin plate is disposed between the front connecting plate and the rear connecting plate and the core assembly, and the epoxy resin plate, the front connecting plate, the rear connecting plate and the core assembly are fixed together by multiple screws.

[0012] Both the front connecting plate and the rear connecting plate are fixed with positioning ribs. The shape and position of the positioning ribs correspond to the fixed rib positions. The positioning ribs and the fixed rib positions are connected by bolts.

[0013] Optionally, the core assembly includes a cell support and multiple individual cells. Two cell supports are provided, respectively disposed on the front and rear sides of the individual cells and located between the epoxy resin board and the individual cells. The individual cells are arranged coaxially in a rectangular array and mounted on the cell supports.

[0014] Optionally, the core assembly further includes connecting pieces, and the individual cells are connected in series and parallel to each other on the cell support through the connecting pieces.

[0015] Optionally, the battery module further includes a fixing plate, on which a battery management module is disposed, the battery management module being used to adjust the charging power of the battery.

[0016] Optionally, the upper ends of the front connecting plate and the rear connecting plate are provided with positioning protrusions, and the fixing plate is provided with positioning holes for the positioning protrusions to be inserted into, and the positions of the positioning protrusions and the positioning holes correspond to each other.

[0017] Optionally, it includes a Bluetooth module and control software electrically connected to the Bluetooth module; the control software is used to remotely turn the battery on and off.

[0018] Optionally, a low-voltage switch is provided on the top of the cover.

[0019] Compared with the prior art, this application has at least the following beneficial effects:

[0020] 1. The design of the fixing ribs makes it easier to disassemble the battery module, while the heat insulation layer effectively prevents the high temperature from the engine compartment from being conducted to the battery. Moreover, the recessed grooves on the heat insulation layer make the heat insulation layer and the fixing ribs independent of each other. The heat insulation layer is removable, and the fixing ribs also separate the battery module from the heat insulation layer, providing the battery module with a certain amount of heat dissipation space. This allows for easy disassembly and maintenance of the battery module without affecting its heat dissipation, thus balancing heat dissipation performance and heat insulation effect without affecting battery maintenance.

[0021] 2. Waterproof material can enter the glue-applying groove. Since it is located in the top cover, the waterproof material can be squeezed when the top cover and bottom shell are fastened together to achieve waterproof and dustproof function, without affecting the disassembly and maintenance of the entire battery.

[0022] 3. By setting the low-voltage switch, the battery can be turned off when the vehicle is not in use for a long time to prevent it from being depleted and affecting its lifespan. Attached Figure Description

[0023] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0024] Figure 1 This is a schematic diagram of the structure of a sodium-ion vehicle start-stop battery provided in an embodiment of this application;

[0025] Figure 2 This is an explosion diagram of a sodium-ion vehicle start-stop battery provided in an embodiment of this application;

[0026] Figure 3 for Figure 1 A bottom view of the upper middle cover;

[0027] Figure 4 for Figure 2 A schematic diagram of the structure of the battery module;

[0028] Figure 5 for Figure 2 Installation diagram of the central fixed reinforcement position;

[0029] Figure 6 This is a cross-sectional view of the casing of a sodium-ion vehicle start-stop battery provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Battery module; 2. Bottom shell; 3. Top cover; 4. Snap-on structure; 5. Terminal post; 6. Low-voltage switch; 7. Heat insulation layer; 8. Front connecting plate; 9. Rear connecting plate; 10. Epoxy resin board; 11. Screw; 12. Cell bracket; 13. Connecting piece; 14. Individual cell; 15. Fixing plate; 16. Positioning protrusion; 17. Positioning hole; 18. Fixing rib; 19. Leaving groove; 20. Positioning rib plate; 21. Glue groove; 22. Battery management module. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0034] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0035] A sodium-ion vehicle start-stop battery, reference Figures 1-6 The system includes a housing and a battery module 1 installed inside the housing. The housing includes a bottom shell 2 and a top cover 3 connected by a snap-fit ​​structure 4. The bottom shell 2 is a rectangular box-shaped structure with an open top, and the top cover 3 is a rectangular cover adapted to its shape. Two power supply terminals 5 are provided on the left and right sides of the top surface of the top cover 3, and a low-voltage switch 6 is located in the middle. The low-voltage switch 6 is used to quickly turn the battery output on or off. For example, turning off the battery output during transportation improves transportation safety; turning off the battery output can significantly reduce battery power consumption when the vehicle needs to be parked and not used for a long time; and the low-voltage switch can be used to promptly cut off the battery output in the event of a traffic accident.

[0036] A heat insulation layer 7 is provided between the inner wall of the bottom shell 2 and the battery module 1. The shape of the heat insulation layer 7 is adapted to the inner cavity of the bottom shell 2 and can contact the inner wall of the base. In this embodiment, the heat insulation layer 7 is made of polypropylene microporous foam material, forming a rectangular tubular structure that is open at both the top and bottom.

[0037] The battery module 1 includes a core assembly, a front connecting plate 8 located in front of the core assembly, and a rear connecting plate 9 located behind the core assembly. Epoxy resin plates 10 are provided between the front connecting plate 8 and the rear connecting plate 9 and the core assembly for isolation. The epoxy resin plates 10, the front connecting plate 8, the rear connecting plate 9, and the core assembly are fixed together by multiple screws 11 to maintain the stability of the battery module 1.

[0038] The core assembly includes a cell support 12, connecting plates 13, and multiple individual cells 14. Two cell supports 12 are provided, respectively located on the front and rear sides of all individual cells 14, situated between the epoxy resin plate 10 and the individual cells 14. The individual cells 14 are arranged coaxially in a rectangular array, interconnected in series and parallel via the connecting plates 13, and fixed by insertion. This allows each individual cell 14 to be individually isolated, facilitating heat dissipation for each cell.

[0039] The battery module 1 also includes a mounting plate 15, on which a battery management module 22 (BMS) is mounted. The battery management module 22 is used to adjust the charging power of the battery. Specifically, the battery management module 22 has a charging current limiting function, which can effectively reduce the charging power when the battery is charged in low or high temperature environments, ensuring safe charging of the battery while effectively extending the battery's lifespan.

[0040] The upper ends of the front connecting plate 8 and the rear connecting plate 9 are provided with two positioning protrusions 16. The fixing plate 15 is provided with four positioning holes 17 for the positioning protrusions 16 to be inserted. The positions of the positioning protrusions 16 and the positioning holes 17 are corresponding, thereby locking the installation position of the fixing plate 15 on the battery module 1.

[0041] A Bluetooth module is also installed on the mounting plate 15. Control software (app) electrically connected to the Bluetooth module can be installed on the user's mobile terminal; the control software is used to remotely start and stop the battery. Specifically, the user can set a preset threshold in the control software. When the battery level falls below this threshold, the battery shuts down, thus locking in a portion of the battery power and enabling an emergency start function. When the battery is in over-discharge protection mode, by opening the dedicated battery app on the mobile phone and connecting to the battery via Bluetooth, the emergency start function of the battery can be activated in the app, enabling the vehicle to start smoothly.

[0042] To enable the detachable installation of the battery module 1, a fixing rib 18 protruding from the inner wall surface of the bottom shell 2 is fixedly installed inside the bottom shell 2. The fixing rib 18 is used to position the battery module 1, and the two are connected by bolts. In this embodiment, the fixing rib 18 is made of square steel with an opening on one side, which faces the battery module 1. To facilitate the installation of the heat insulation layer 7, a rectangular clearance groove 19 is provided at the bottom of the side wall of the heat insulation layer 7 corresponding to the fixing rib 18 for the fixing rib 18 to be inserted.

[0043] Positioning ribs 20 are fixed on both the front connecting plate 8 and the rear connecting plate 9. The shape and position of the positioning ribs 20 correspond to the fixing ribs 18. The positioning ribs 20 and the fixing ribs 18 are connected by bolts. When installing the battery module 1, it is placed into the bottom shell 2 from top to bottom. Note that the positioning ribs 20 correspond to the fixing ribs 18. When the bottom surface of the battery module 1 contacts the inner bottom wall of the bottom shell 2, the positioning ribs 20 just contacts the fixing ribs 18. Finally, the two are connected by bolts.

[0044] To achieve a sealed and dustproof seal, a groove 21 is provided on the bottom surface of the top cover 3. The groove 21 is filled with waterproof silicone, which forms a waterproof silicone pad after it dries completely. The groove 21 is positioned opposite the top of the bottom shell 2, so that when the top cover 3 is placed on the bottom shell 2, the dried waterproof silicone pad presses between the bottom shell 2 and the top cover 3, thus achieving a waterproof and dustproof effect.

[0045] The battery management module 22, control software, and threshold settings used in this application embodiment are all existing technologies.

[0046] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A sodium-ion vehicle start-stop battery, characterized in that: The device includes an outer shell and a battery module (1) installed inside the outer shell. The outer shell includes a bottom shell (2) and a top cover (3) connected by a snap-fit ​​structure (4). A heat insulation layer (7) is provided between the inner wall of the bottom shell (2) and the battery module (1). The shape of the heat insulation layer (7) is adapted to the inner cavity of the bottom shell (2) and can contact the inner wall of the base. The bottom shell (2) is fixedly installed with a fixing rib (18) protruding from the inner wall surface of the bottom shell (2). The fixing rib (18) is used to position the battery module (1), and the heat insulation layer (7) is provided with a clearance groove (19) for the fixing rib (18) to be inserted.

2. The sodium-ion vehicle start-stop battery according to claim 1, characterized in that: The heat insulation layer (7) is made of polypropylene microporous foam material.

3. The sodium-ion vehicle start-stop battery according to claim 1, characterized in that: The bottom surface of the upper cover (3) is provided with a ring of glue groove (21), and the position of the glue groove (21) corresponds to the upper end of the bottom shell (2).

4. The sodium-ion vehicle start-stop battery according to claim 1, characterized in that: The battery module (1) includes a core assembly, a front connecting plate (8) located in front of the core assembly, and a rear connecting plate (9) located behind the core assembly. An epoxy resin plate (10) is provided between the front connecting plate (8) and the rear connecting plate (9) and the core assembly. The epoxy resin plate (10), the front connecting plate (8), the rear connecting plate (9) and the core assembly are fixed together by a plurality of screws (11). Positioning ribs (20) are fixed on both the front connecting plate (8) and the rear connecting plate (9). The shape and position of the positioning ribs (20) correspond to the fixed rib positions (18). The positioning ribs (20) and the fixed rib positions (18) are connected by bolts.

5. The sodium-ion vehicle start-stop battery according to claim 4, characterized in that: The core assembly includes a cell support (12) and multiple individual cells (14). There are two cell supports (12), which are respectively arranged on the front and rear sides of the individual cells (14) and between the epoxy resin board (10) and the individual cells (14). The individual cells (14) are arranged in a rectangular array coaxially and installed on the cell support (12).

6. The sodium-ion vehicle start-stop battery according to claim 5, characterized in that: The core assembly also includes a connecting piece (13), and the individual cells (14) are connected in series and parallel to each other on the cell support (12) through the connecting piece (13).

7. The sodium-ion vehicle start-stop battery according to claim 4, characterized in that: The battery module (1) also includes a fixing plate (15), on which a battery management module (22) is provided. The battery management module (22) is used to adjust the charging power of the battery.

8. The sodium-ion vehicle start-stop battery according to claim 7, characterized in that: The upper ends of the front connecting plate (8) and the rear connecting plate (9) are provided with positioning protrusions (16), and the fixing plate (15) is provided with positioning holes (17) for the positioning protrusions (16) to be inserted. The positions of the positioning protrusions (16) and the positioning holes (17) are corresponding.

9. The sodium-ion vehicle start-stop battery according to claim 1, characterized in that: It includes a Bluetooth module and control software electrically connected to the Bluetooth module; the control software is used to remotely start and stop the battery.

10. The sodium-ion vehicle start-stop battery according to claim 1, characterized in that: A low-voltage switch (6) is provided on the top of the cover.

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