A lithium-ion battery pack

Abstract

The utility model discloses a lithium ion battery pack relates to lithium ion battery technical field, aims at solving the problem of existing battery pack electric core bulge stress concentration, pressure relief is blocked, poor structure impact resistance, easy short circuit and lack of remote monitoring. The battery pack includes integrated metal bearing shell, and the integrated metal bearing shell is equipped with the big capacity power electric core that is fully covered through the epoxy board, and the big capacity power electric core is connected through the bridging type conductive aluminum row electricity of bridge shape change to flat, and the epoxy board is opened the special pressure relief hole of electric core pressure relief valve of accurate correspondence with electric core pressure relief valve, and the big capacity power electric core is connected total positive and negative pole current -collecting aluminum row, and total positive and negative pole current -collecting aluminum row is electrically connected with power electric core integrated protection board. Integrated metal bearing shell is equipped with reinforcing rib, and pre -buried nut glue filling fixed, and the upper portion is also equipped with 4G module integrated installation support. It can relieve the bulge stress, guarantee the pressure relief safety, prevent short circuit, enhance the structural stability, realize remote monitoring, and the assembly precision is high.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, and more specifically to a lithium-ion battery pack. Background Technology

[0002] Lithium-ion battery packs are widely used in electric vehicles, energy storage systems, and other power equipment. However, existing lithium-ion battery packs have several problems during long-term use: First, the cells are prone to bulging during charging, discharging, or overheating, leading to internal mechanical stress concentration, which may cause connector breakage or cell damage; second, when the cell pressure relief valve is triggered, the pressure relief airflow may be obstructed, increasing the risk of explosion; in addition, the structural design of battery packs often lacks sufficient rigidity and impact resistance, making them prone to loosening under vibration or impact environments; at the same time, the insulation protection of battery packs is insufficient, which can easily lead to electrical short circuits; finally, existing battery packs usually lack integrated remote monitoring functions, making it difficult to achieve real-time data transmission and status management.

[0003] Therefore, there is an urgent need for a new type of lithium-ion battery pack that can solve the above problems and improve safety, reliability and intelligence. Utility Model Content

[0004] The purpose of this invention is to solve the problems of stress concentration due to cell bulging, obstructed pressure relief, poor structural impact resistance, susceptibility to short circuits, and lack of remote monitoring in existing battery packs. It provides a lithium-ion battery pack that effectively alleviates cell bulging stress, ensures normal operation of the pressure relief valve, enhances structural stability, prevents electrical short circuits, and enables remote monitoring through designs such as an integrated metal load-bearing shell, epoxy board full-coverage of the cells, bridged conductive aluminum busbars, dedicated pressure relief valve holes, and integrated 4G module mounting brackets.

[0005] The technical solution adopted by this utility model is as follows: A lithium-ion battery pack includes: an integrated metal bearing shell, in which a large-capacity power cell fully covered by an epoxy board is disposed; the large-capacity power cells are electrically connected by a bridging conductive aluminum busbar, which is configured to deform from a bridge-shaped structure to a flat structure when the cell bulges; the epoxy board has a dedicated pressure relief hole for the cell pressure relief valve corresponding to the cell pressure relief valve; the large-capacity power cell is connected to a total positive and negative current collector aluminum busbar, which is electrically connected to the integrated protection board of the power cell.

[0006] Preferably, the integrated metal bearing housing is provided with shell reinforcing ribs; the integrated metal bearing housing is also provided with mounting holes.

[0007] Preferably, the integrated metal bearing housing includes a housing side guard plate, a housing front guard plate, and a housing top guard plate. The housing top guard plate is provided with protection plate mounting holes, heating film, and insulator mounting holes, wherein the protection plate mounting holes are used to install the power cell integrated protection plate.

[0008] Preferably, the epoxy board wraps the high-capacity power battery cell to form an insulating layer, and isolates the wrapped high-capacity power battery cell from the metal sheet metal parts of the integrated metal load-bearing housing.

[0009] Preferably, the bridge-shaped structure of the bridging conductive aluminum busbar has a pre-designed deformation capability.

[0010] Preferably, the oblong design of the dedicated pressure relief port of the battery cell pressure relief valve is precisely aligned with the position of the battery cell pressure relief valve.

[0011] Preferably, the integrated metal bearing housing has an adhesive inside formed by potting, the adhesive covers the pre-embedded nut, and the adhesive is fixedly connected to the inner wall of the integrated metal bearing housing and the pre-embedded nut.

[0012] Preferably, the high-capacity power cell is positioned by means of pre-set holes in the sheet metal of the integrated metal bearing housing and pre-embedded nuts in the housing, and the rear of the cell is in direct contact with the inner wall of the housing.

[0013] Preferably, the upper part of the integrated metal bearing housing is provided with a 4G module integrated mounting bracket, and a heating film is provided in front of the 4G module integrated mounting bracket.

[0014] Preferably, the main positive and negative current collector aluminum busbar is used in conjunction with an epoxy board, and the epoxy board is configured to isolate the main positive and negative current collector aluminum busbar from the surrounding metal components.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. High safety: The epoxy board fully encapsulates the battery cell and the deformation design of the bridged conductive aluminum busbar effectively prevents electrical short circuits and alleviates the stress of battery cell bulging; the waist-shaped pressure relief valve ensures the normal operation of the pressure relief valve and reduces the risk of explosion.

[0016] 2. Structural stability: The integrated metal load-bearing shell features reinforcing ribs and a three-dimensional positioning design, enhancing overall rigidity and impact resistance; the potting process secures the pre-embedded nuts to prevent loosening.

[0017] 3. Intelligent Management: The 4G module integrated mounting bracket facilitates the installation of the communication module, enabling remote monitoring and data transmission, and improving the management efficiency of the battery pack.

[0018] 4. High assembly precision: The battery cell is precisely positioned by using pre-set holes and pre-embedded nuts in the sheet metal, simplifying the assembly process.

[0019] 5. Improved adaptability to low-temperature environments: By integrating a heating film on the top protective plate of the casing, when the battery pack is in a low-temperature environment, the heating film can be activated to uniformly heat the internal cells, allowing them to quickly rise to the appropriate operating temperature range. This effectively solves the problem of battery performance degradation caused by low temperatures and ensures normal start-up and stable operation of the battery in harsh environments such as cold regions or winter. Attached Figure Description

[0020] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the integrated metal load-bearing shell structure of this utility model; The markings in the diagram are as follows: 1-Integrated metal load-bearing housing, 11-Housing reinforcing rib, 12-Mounting hole, 13-Housing side guard plate, 14-Housing front guard plate, 15-Housing top guard plate, 151-Protection plate mounting hole, 152-Heating film, 153-Insulator mounting hole, 154-4G module integrated mounting bracket, 2-Large capacity power cell, 21-Bridged conductive aluminum busbar, 22-Dedicated pressure relief hole for cell pressure relief valve, 23-Total positive and negative current collector aluminum busbar, 3-Power cell integrated protection board. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] In one embodiment of this utility model, such as Figure 1-3As shown, this embodiment provides a lithium-ion battery pack, including an integrated metal carrier housing 1. A large-capacity power cell 2, fully encased in an epoxy board, is disposed within the integrated metal carrier housing 1. The large-capacity power cells 2 are electrically connected to each other via a bridging conductive aluminum busbar 21. The bridging conductive aluminum busbar 21 is configured to deform from a bridge-like structure to a flat structure when a cell bulges, thereby alleviating mechanical stress. A dedicated pressure relief valve hole 22, corresponding to the cell pressure relief valve, is provided on the epoxy board. The dedicated pressure relief valve hole 22 is an oblong hole, used to precisely avoid the pressure relief valve and guide the pressure relief airflow. The large-capacity power cells 2 are connected to a total positive and negative current collector aluminum busbar 23, which is electrically connected to a power cell integrated protection board 3.

[0024] In another embodiment of the present invention, the integrated metal bearing housing 1 is provided with a housing reinforcing rib 11 to enhance the structural rigidity and impact resistance; the integrated metal bearing housing 1 is also provided with a mounting hole 12 for fixing the battery pack to an external device.

[0025] In another embodiment of the present invention, the integrated metal bearing housing 1 includes a housing side guard plate 13, a housing front guard plate 14 and a housing top guard plate 15. The housing top guard plate 15 is provided with a protection plate mounting hole 151, a heating film 152 and an insulator mounting hole 153. The protection plate mounting hole 151 is used to install the power cell integrated protection plate 3.

[0026] In another embodiment of this utility model, the epoxy board completely wraps the high-capacity power cell 2 to form an insulating layer, and isolates the wrapped high-capacity power cell 2 from the metal sheet metal parts of the integrated metal bearing housing 1 to prevent electrical short circuits and heat conduction.

[0027] In another embodiment of this utility model, the bridge-shaped structure of the bridging conductive aluminum busbar 21 has a pre-designed deformation capability, which can absorb the expansion force through deformation when the battery cell bulges, thus maintaining the reliability of the electrical connection.

[0028] In another embodiment of this utility model, the waist-shaped hole design of the dedicated pressure relief hole 22 of the battery cell pressure relief valve is precisely aligned with the position of the battery cell pressure relief valve, ensuring that the pressure relief valve can release internal pressure without obstruction when triggered.

[0029] In another embodiment of this utility model, the integrated metal bearing housing 1 is internally encapsulated with a potting process to cover the embedded nut. Specifically, the integrated metal bearing housing 1 contains a potting compound that covers the embedded nut, and the compound forms a fixed connection with both the inner wall of the integrated metal bearing housing 1 and the embedded nut. The curing of the compound creates a mechanical lock, preventing the embedded nut from loosening or falling off.

[0030] In another embodiment of this utility model, the high-capacity power cell 2 is positioned in three dimensions by means of pre-set holes in the sheet metal of the integrated metal bearing housing 1 and pre-embedded nuts in the housing, and the rear of the cell is in direct contact with the inner wall of the housing, thereby improving assembly accuracy and structural stability.

[0031] In another embodiment of this utility model, a 4G module integrated mounting bracket 154 is provided on the upper part of the integrated metal bearing housing 1 for installing a 4G communication module to realize remote monitoring and data transmission. The 4G module integrated mounting bracket 154 is located on the upper part of the integrated metal bearing housing 1 and is away from metal obstructions to avoid signal attenuation and interference.

[0032] In another embodiment of this utility model, the main positive and negative current collector aluminum busbar 23 is used in conjunction with an epoxy board, which is configured to isolate the main positive and negative current collector aluminum busbar 23 from the surrounding metal components to prevent arcing and short circuits.

[0033] Specifically, the lithium-ion battery pack of this invention includes an integrated metal carrier shell 1, which is made of aluminum alloy or steel sheet metal and features high strength and lightweight. A large-capacity power cell 2 is housed inside the integrated metal carrier shell 1, and the large-capacity power cell 2 is completely covered by an epoxy board to form an insulating layer. The epoxy board is made of high-temperature resistant and flame-retardant material to ensure isolation between the large-capacity power cell 2 and the metal components of the integrated metal carrier shell 1, preventing electrical short circuits and heat conduction. The large-capacity power cells 2 are electrically connected through a bridging conductive aluminum busbar 21. The bridging conductive aluminum busbar 21 is designed as a bridge-shaped structure with pre-designed deformation capability. When a cell 2 bulges, the bridging conductive aluminum busbar 21 can deform from a bridge-shaped structure to a flat structure, absorbing the expansion force, preventing connection point breakage, and maintaining the reliability of the electrical connection. A dedicated pressure relief hole 22 for the cell pressure relief valve is provided on the epoxy board. This dedicated pressure relief hole 22 is an oblong hole, precisely corresponding to the position of the cell pressure relief valve. The waist-shaped hole design precisely avoids the pressure relief valve and guides the pressure relief airflow to escape quickly when the valve is triggered, preventing pressure buildup. The high-capacity power cell 2 is connected to the main positive and negative current collector aluminum busbar 23, which is electrically connected to the power cell integrated protection board 3. The power cell integrated protection board 3 is responsible for the battery pack's charge and discharge management, overvoltage / overcurrent protection, and other functions. The main positive and negative current collector aluminum busbar 23 is used in conjunction with an epoxy board, which isolates the aluminum busbar from surrounding metal components to prevent arcing and short circuits. The integrated metal load-bearing housing 1 is equipped with housing reinforcing ribs 11 to enhance the structural rigidity and impact resistance of the housing. The integrated metal load-bearing housing 1 also has mounting holes 12 for fixing the battery pack to external equipment using bolts. The integrated metal load-bearing housing 1 consists of a housing side guard plate 13, a housing front guard plate 14, and a housing top guard plate 15. The top protective plate 15 of the housing is provided with protective plate mounting holes 151, heating film 152, and insulator mounting holes 153 for positioning internal components and external connection. Inside the integrated metal bearing housing 1, a potting process is used to cover the embedded nuts. After the adhesive cures, it forms a mechanical lock to prevent the embedded nuts from loosening and falling off under vibration. The high-capacity power cell 2 is matched with the sheet metal pre-set holes of the integrated metal bearing housing 1 and the pre-embedded nuts in the housing, and the rear of the cell is in direct contact with the inner wall of the housing to achieve three-dimensional positioning, ensuring assembly accuracy and structural stability. On the upper part of the top protective plate 15, a 4G module integrated mounting bracket 154 is provided. This bracket is away from metal obstructions to avoid signal attenuation and interference. The 4G communication module (not shown) can be installed on the bracket 154 to realize remote monitoring, data transmission, and status management of the battery pack, such as real-time monitoring of battery voltage, temperature, and fault information through a cloud platform.

[0034] In assembling this lithium-ion battery pack, the high-capacity power cell 2 is first encased in an epoxy board, then placed inside an integrated metal carrier housing 1. The cells are connected via a bridging conductive aluminum busbar 21, and the main positive and negative current collector aluminum busbar 23 and protection plate 3 are installed. Finally, the battery pack is secured through mounting holes 12, and a 4G module is installed. This battery pack is suitable for electric vehicles, energy storage systems, and other applications, offering high safety and reliability.

[0035] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A lithium-ion battery pack, characterized in that, include: An integrated metal bearing housing (1) is provided with a large-capacity power battery cell (2) fully covered by an epoxy board inside the integrated metal bearing housing (1). The high-capacity power cells (2) are electrically connected to each other by a bridge-type conductive aluminum busbar (21), which is configured to deform from a bridge-shaped structure to a flat structure when the cells bulge. The epoxy board is provided with a dedicated pressure relief hole (22) for the battery cell pressure relief valve, which corresponds to the battery cell pressure relief valve. The high-capacity power cell (2) is connected to a total positive and negative current collector aluminum busbar (23), which is electrically connected to the power cell integrated protection board (3).

2. The lithium-ion battery pack according to claim 1, characterized in that, The integrated metal bearing housing (1) is provided with a housing reinforcing rib (11); the integrated metal bearing housing (1) is also provided with a mounting hole (12).

3. The lithium-ion battery pack according to claim 1, characterized in that, The integrated metal bearing housing (1) includes a housing side guard plate (13), a housing front guard plate (14) and a housing top guard plate (15). The housing top guard plate (15) is provided with a protection plate mounting hole (151), a heating film (152) and an insulator mounting hole (153). The protection plate mounting hole (151) is used to install the power cell integrated protection plate (3).

4. The lithium-ion battery pack according to claim 1, characterized in that, The epoxy board wraps the high-capacity power cell (2) to form an insulating layer, and isolates the wrapped high-capacity power cell (2) from the metal sheet metal of the integrated metal bearing housing (1).

5. The lithium-ion battery pack according to claim 1, characterized in that, The bridge-shaped structure of the bridged conductive aluminum busbar (21) has a pre-designed deformation capability.

6. The lithium-ion battery pack according to claim 1, characterized in that, The waist-shaped hole design of the dedicated pressure relief hole (22) of the battery cell pressure relief valve is precisely aligned with the position of the battery cell pressure relief valve.

7. The lithium-ion battery pack according to claim 1, characterized in that, The integrated metal bearing housing (1) has an adhesive inside formed by potting. The adhesive covers the pre-embedded nut and forms a fixed connection with the inner wall of the integrated metal bearing housing (1) and the pre-embedded nut.

8. The lithium-ion battery pack according to claim 1, characterized in that, The high-capacity power cell (2) is positioned by using the sheet metal pre-set holes of the integrated metal bearing housing (1) and the pre-embedded nuts in the housing, and the rear of the cell is in direct contact with the inner wall of the housing.

9. The lithium-ion battery pack according to claim 3, characterized in that, The upper part of the integrated metal bearing housing (1) is provided with a 4G module integrated mounting bracket (154), and a heating film (152) is provided in front of the 4G module integrated mounting bracket (154).

10. The lithium-ion battery pack according to claim 1, characterized in that, The total positive and negative current collector aluminum busbar (23) is used in conjunction with an epoxy board, which is configured to isolate the total positive and negative current collector aluminum busbar (23) from the surrounding metal components.

Images