High-capacity safety battery

Abstract

The utility model aims to provide a high-capacity safety battery, which can simplify electrical wiring, quickly respond to and protect thermal runaway of the battery, and improve the safety and reliability of the battery. The prolate power battery comprises a prolate bottom shell and an upper cover matched with the bottom shell, supporting plates are arranged on the two sides of the interior of the bottom shell in the long edge direction, a plurality of battery modules fixed between the supporting plates are arranged in the bottom shell, an electrical module is further arranged in the bottom shell, and the battery modules are electrically connected with the electrical module after being connected in series. A plurality of aerosol fire extinguishing devices are uniformly arranged above the plurality of battery modules, each aerosol fire extinguishing device further comprises a temperature probe, an in-line wiring channel is formed between the supporting plate and the plurality of battery modules, and an electrical cable in the bottom shell is arranged along the in-line wiring channel. The utility model relates to the technical field of lithium batteries.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a large-capacity safe battery. Background Art

[0002] In order to make full use of higher capacity batteries, the industry often connects multiple batteries in series into modules. However, if the current capacity of the modules after series connection is not fully considered during the design phase, or the batteries are improperly used in actual applications, gases or other harmful substances may be generated, and in extreme cases, the batteries may even explode, posing a major threat to the safety of personnel and equipment.

[0003] In response to this problem, some companies have begun to make technical improvements. For example, the Chinese utility model patent with publication number CN216022784U discloses a lithium-safe aerosol fire extinguisher. The fire extinguisher realizes real-time monitoring of battery temperature by integrating temperature-sensitive cables and temperature-sensitive magnetic power generation components, and significantly improves the fire extinguishing efficiency and coverage with the help of a booster mechanism. This solution effectively solves the problems of slow response and unstable fire extinguishing effect of traditional aerosol fire extinguishers, but it is still difficult to meet the needs of large-scale applications or high-capacity battery systems.

[0004] Therefore, it is particularly important to develop a large-capacity, safe and reliable power battery in order to comprehensively improve the safety and reliability of the power battery system and bring more robust and safe energy solutions to the industry. Utility Model Content

[0005] In view of the problems of insufficient overcurrent capacity of battery modules in series connection, complex electrical wiring and insufficient thermal runaway protection in the prior art, the utility model proposes a large-capacity safe battery. The design of the utility model aims to simplify electrical wiring, improve overcurrent capacity, quickly respond to and protect against thermal runaway of the battery, and improve the safety and reliability of the battery.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a large-capacity safety battery, including a flat and long bottom shell and an upper cover adapted to the bottom shell, support plates are arranged on both sides of the interior of the bottom shell and along the long side direction, a plurality of battery modules fixed between the support plates are arranged in the bottom shell, an electrical module is also arranged in the bottom shell, a plurality of battery modules are connected in series and electrically connected to the electrical module, a plurality of aerosol fire extinguishing devices are evenly arranged above the battery modules, the aerosol fire extinguishing devices also include a temperature probe, the gap between the support plate and the battery module constitutes a straight wiring groove, and the electrical cables in the bottom shell are wired along the straight wiring groove.

[0007] Based on the above, the utility model effectively monitors and protects the battery module by fixing the battery module on the support plate and setting an aerosol fire extinguishing device and a temperature probe. Such a design improves the safety and reliability of the battery and effectively prevents safety problems caused by battery failures.

[0008] Further, the battery module is composed of several battery cells attached together, and fixed end plates are provided on both sides thereof. The fixed end plates are fitted to the support plate by bolts, and lifting nuts are also provided on the fixed end plates. The battery module is carried and installed by screwing in lifting bolts adapted to the lifting nuts.

[0009] Based on the above design, the installation and disassembly of the battery module become more convenient and fast, improving the maintenance efficiency and reducing the maintenance cost.

[0010] Further, the electrodes of several battery cells are connected in series through long aluminum sheets or L-shaped aluminum sheets, and the electrodes of adjacent battery modules are connected in series through L-shaped aluminum sheets and connecting copper bars. The connecting copper bars are arranged between two opposite L-shaped aluminum sheets, and nickel layers are coated on the contact surfaces between the L-shaped aluminum sheets and the connecting copper bars and between the fixed end plates and the support plate.

[0011] Based on the above design, not only the series connection method of the battery module is simplified, but also the conductivity is enhanced and oxidation is prevented by coating the nickel layer, improving the service life and safety of the battery and reducing battery failures caused by poor contact or oxidation.

[0012] Further, the battery module further includes a short battery cell group. One fixed end plate of the short battery cell group is fixed on the support plate, and the other fixed end plate is fixed on the bottom surface of the bottom case through a support frame.

[0013] Based on the above design, the battery module can more flexibly adapt to the vehicle body space of different sizes and shapes, improving the installation convenience and adaptability, and enabling the battery module to better meet the actual application requirements.

[0014] Further, bottom case reinforcing ribs surrounding the inside of the bottom case are provided below the support plate, several upper cover reinforcing ribs are provided on the inner side surface of the upper cover, and lifting ears are provided on both outer sides of the bottom case.

[0015] Based on the above design, the overall structural strength of the battery is enhanced, the seismic resistance and durability are improved, and the service life of the battery is extended. At the same time, the design of the lifting ears makes the lifting and installation of the battery more convenient and fast, reducing the installation difficulty and cost.

[0016] In summary, the large-capacity safety battery of the present utility model improves the installation convenience, service life and safety of the battery by optimizing the structure and series connection method of the battery module. At the same time, the overall structural strength of the battery is enhanced, bringing a more stable and safe energy solution to the industry.

[0017] In order to more clearly elaborate the above features of the present utility model and the purposes to be achieved, the following further illustrates the present utility model in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0018] Figure 1 : is a schematic structural diagram of the present utility model;

[0019] Figure 2 : is Figure 1 An enlarged structural diagram of part A in

[0020] Figure 3 : is a top view of the present utility model;

[0021] Figure 4 : is Figure 3 An enlarged structural diagram of part B in

[0022] Figure 5 : is a bottom view of the upper cover 2.

[0023] Explanation of the reference numerals in the drawings: 1 - bottom case; 11 - in-line wiring groove; 12 - bottom case reinforcing rib; 13 - lifting port; 2 - upper cover; 21 - upper cover reinforcing rib; 3 - support plate; 4 - battery module; 40 - short cell group; 41 - cell; 42 - fixed end plate; 43 - lifting nut; 45 - long aluminum sheet; 46 - L-shaped aluminum sheet; 47 - adapter copper bar; 48 - support frame; 5 - electrical module; 6 - aerosol fire extinguishing device; 61 - temperature probe. Detailed Embodiment

[0024] As Figures 1 to 5 shown, the specific implementation manner of this embodiment is as follows: First, prepare a flat and long bottom case 1 and an upper cover 2 adapted to the bottom case 1. On both sides of the inside of the bottom case 1 and along the long side direction, a support plate 3 is welded to fix and support the battery module 4. Then, a number of cells 41 are fitted together to form the battery module 4, and fixed end plates 42 are installed on both sides thereof. The fixed end plates 42 are cooperated with the support plate 3 by bolts to ensure that the battery module 4 is firmly fixed in the bottom case 1. At the same time, lifting nuts 43 are welded on the fixed end plates 42, so that during subsequent handling and installation, operations can be carried out by screwing in lifting bolts adapted to the lifting nuts 43.

[0025] Next, the electrodes of the battery module 4 are connected in series. The electrodes of several battery cells 41 are connected in series through long aluminum sheets 45 or L-shaped aluminum sheets 46. The adjacent battery modules 4 are connected in series through L-shaped aluminum sheets 46 and transfer copper bars 47. The transfer copper bars 47 are arranged between two opposite L-shaped aluminum sheets 46 to ensure smooth current transmission. At the same time, nickel layers are coated on the contact surfaces between the L-shaped aluminum sheets 46 and the transfer copper bars 47, and between the fixed end plates 42 and the support plates 3 to enhance conductivity and prevent oxidation.

[0026] In addition, in order to adapt to the body space of different sizes and shapes, the battery module 4 in this embodiment further includes a short battery cell group 40. One fixed end plate 42 of the short battery cell group 40 is fixed on the support plate 3, and the other fixed end plate 42 is fixed on the bottom surface of the bottom case 1 through a support frame 48 to achieve flexible installation.

[0027] Inside the bottom case 1, an electrical module 5 is also provided for managing and controlling the charging and discharging process of the battery module 4. Several battery modules 4 are connected in series and electrically connected to the electrical module 5 to achieve power transmission and distribution.

[0028] To enhance the overall structural strength of the battery, improve seismic resistance and durability, a bottom case reinforcing rib 12 surrounding the inner side of the bottom case 1 is also provided below the support plate 3. At the same time, several upper case reinforcing ribs 21 are also provided on the inner side surface of the upper cover 2 to further reinforce the battery structure. Lifting ears 13 are provided on both outer sides of the bottom case 1 to facilitate lifting and installation operations.

[0029] Finally, several aerosol fire extinguishing devices 6 are evenly arranged above the battery module 4. Each fire extinguishing device 6 is equipped with a temperature probe 61 for real-time monitoring of the temperature of the battery module 4. Once the temperature rises abnormally, the aerosol fire extinguishing device 6 will be immediately activated to release the fire extinguishing agent to extinguish potential fires and ensure the safe operation of the battery.

[0030] In summary, the large-capacity and safe battery of this embodiment improves the installation convenience, service life and safety of the battery by optimizing the structure and series connection method of the battery module, and at the same time enhances the overall structural strength of the battery, bringing a more stable and safe energy solution to the industry.

[0031] The above description is only the optimal solution embodiment of the present invention and is not used to limit the present invention. Various modifications or substitutions made by those skilled in the art to the present invention without departing from the essence and protection scope of the present invention should also be within the protection scope of the present invention.

Claims

1. A high-capacity safety battery, comprising an oblong bottom case (1) and an upper cover (2) adapted to the bottom case (1), characterized in that: On both inner sides of the bottom shell (1) and along the long side direction, there are support plates (3) provided. In the bottom shell (1), there are several battery modules (4) fixed between the support plates (3). An electrical module (5) is also arranged in the bottom shell (1). After being connected in series, several battery modules (4) are electrically connected to the electrical module (5). Above several battery modules (4), several aerosol fire extinguishing devices (6) are evenly arranged. The aerosol fire extinguishing device (6) also includes a temperature probe (61). The gap between the support plate (3) and several battery modules (4) forms a straight-line wiring groove (11). The electrical cables in the bottom shell (1) are routed along the straight-line wiring groove (11).

2. The large-capacity safety battery according to claim 1, wherein: The battery module (4) is composed of several battery cells (41) attached together, and fixed end plates (42) are arranged on both sides thereof. The fixed end plates (42) are fitted to the support plates (3) by bolts. A lifting nut (43) is also arranged on the fixed end plate (42). The battery module (4) is carried and installed by screwing in a lifting bolt adapted to the lifting nut (43).

3. The large-capacity safety battery according to claim 2, wherein: Between several battery cells (41), electrode series connection is carried out through long aluminum sheets (45) or L-shaped aluminum sheets (46). Between adjacent battery modules (4), electrode series connection is carried out through L-shaped aluminum sheets (46) and connection copper bars (47). The connection copper bar (47) is arranged between two opposite L-shaped aluminum sheets (46). Nickel layers are coated on the contact surfaces between the L-shaped aluminum sheet (46) and the connection copper bar (47) and between the fixed end plate (42) and the support plate (3).

4. A large-capacity safety battery according to claim 2, characterized in that: The battery module (4) also includes a short battery cell group (40). The fixed end plate (42) at one end of the short battery cell group (40) is fixed to the support plate (3), and the fixed end plate (42) at the other end is fixed to the bottom surface of the bottom shell (1) through a support frame (48).

5. The large-capacity safety battery according to claim 1, wherein: Below the support plate (3), a bottom shell reinforcing rib (12) surrounding the inner side of the bottom shell (1) is also provided. On the inner side surface of the upper cover (2), several upper cover reinforcing ribs (21) are provided. On both outer sides of the bottom shell (1), lifting ears (13) are also provided.

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