Flexibly combined lithium battery module

Abstract

The utility model provides a flexibly combined lithium battery module, which belongs to the technical field of battery modules, and comprises a battery bin, a plurality of groups of lithium battery modules arranged in the battery bin, a lower shell, an upper shell and a module body, the lower shell and the upper shell are connected to form a main body cavity, and an inner shell, an adapter plate and an automatic fire extinguishing module are arranged in the main body cavity; the inner shell is connected with the lower shell through the spring piece, and the module body is installed in the inner shell. A mounting groove is formed in the upper shell, a socket and a connector are arranged in the mounting groove, the assembled battery module is provided with a protection plate template, and the protection plate template is electrically connected with a plurality of groups. A plurality of groups of battery modules exist independently, can be arranged differently according to requirements, and are mounted in different special-shaped battery cabins, and the space of the special-shaped cabins is fully utilized through flexible combination, so that the application scene of the battery module is expanded, and the diversified requirements of different equipment and different mounting environments on the battery module are met.

Description

Technical Field

[0001] This utility model belongs to the field of battery module technology, and more specifically, it relates to a flexible combination lithium battery module. Background Technology

[0002] Lead-acid batteries are a common chemical power source, widely used in electric vehicles and various electrical equipment due to their low cost and mature technology. However, lead-acid batteries are heavy, have poor low-temperature charging and discharging capabilities, low overall energy density, and insufficient range, often failing to meet long-term discharge requirements. Furthermore, over time, the internal plates are prone to sulfation, and the electrolyte dries out, leading to rapid capacity decay and a significantly shortened lifespan. To effectively increase the range and battery life of electric vehicles and electrical equipment, lead-acid batteries need to be replaced with lithium batteries. Lithium batteries have high energy density, storing more energy in the same volume or weight. They also have high charging and discharging efficiency, low self-discharge rate, reducing energy loss, and long cycle life, withstanding more charge-discharge cycles, thus providing more durable and efficient power support for electric vehicles and electrical equipment. However, traditional lithium batteries are usually relatively regular and large in size, mostly in fixed rectangular or square shapes, while lead-acid batteries, due to their standardized size and compact size, can be flexibly installed in various irregularly shaped battery compartments. The size limitation of lithium batteries makes them unable to adapt to irregularly shaped battery compartments, making it difficult to directly replace lead-acid batteries in some electric vehicles and electrical equipment that require the use of irregularly shaped compartment space, thus limiting the application scenarios of lithium batteries. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model provides a flexible combination lithium battery module to solve the technical problem that traditional lithium batteries are usually large and regular in shape, making them unsuitable for installation in irregularly shaped battery compartments and limiting the application scenarios of lithium batteries.

[0004] The purpose and effect of this utility model of a flexible combination lithium battery module are achieved by the following specific technical means:

[0005] A flexible combination lithium battery module includes a battery compartment and multiple lithium battery modules installed inside it. Each battery module includes a lower shell, an upper shell, and a module body. The lower shell and the upper shell are connected to form a main cavity. An inner shell, an adapter plate, and an automatic fire suppression module are disposed within the main cavity. The inner shell is connected to the lower shell via a spring, and the module body is installed within the inner shell. The upper shell has a mounting groove containing a socket and a connector. The combined battery module is equipped with a protection plate template, which is electrically connected to the multiple battery modules.

[0006] According to a preferred embodiment, the protective board template includes an upper cover and a lower cover, which are detachably connected to form an installation cavity. A PCB board is disposed in the installation cavity, and the PCB board is electrically connected to the lithium battery module.

[0007] According to a preferred embodiment, the lower shell is provided with a plurality of limiting blocks, the spring is engaged between the limiting blocks, and the lower shell and the spring are provided with a plurality of connecting holes, with connecting bolts passing through the connecting holes, and the spring and the lower shell are detachably connected.

[0008] According to a preferred embodiment, the lower shell is longer and wider than the inner shell, a gap is formed between the lower shell and the inner shell, and multiple sets of rubber blocks are disposed inside the lower shell, with the rubber blocks in contact with the inner shell.

[0009] According to a preferred embodiment, the bottom of the upper shell is provided with a connecting buckle, and the lower shell is provided with a connecting groove corresponding to the connecting buckle, and the connecting buckle is engaged in the connecting groove; both the upper shell and the lower shell are provided with multiple sets of mounting holes, and mounting bolts are inserted into the mounting holes, and the upper shell and the lower shell are detachably connected.

[0010] According to a preferred embodiment, a plurality of insulating plates are provided between the module body and the inner shell.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This combined battery module flexibly employs a design of multiple independent lithium battery modules. The lower and upper shells of each module are connected to form the main cavity, resulting in a compact and flexible internal structure. Each lithium battery module is small in size and can be assembled and installed in different arrangements to suit the shape of irregularly shaped battery compartments. For example, in narrow or irregular spaces, the positions can be adjusted using the gaps between modules and the adjustable connection structure. It can be installed in various irregularly shaped battery compartments, expanding the application of lithium batteries in such scenarios and breaking through the spatial limitations of traditional lithium battery installation.

[0013] This battery module assembly is equipped with a protection board template, which is electrically connected to each lithium battery module. The protection board template includes an upper cover and a lower cover, which are detachably connected to form a mounting cavity. A PCB board is housed within the mounting cavity. Specifically, the PCB board is connected to the module body via a wiring harness. The PCB board can be equipped with features such as positioning and Bluetooth connectivity, active balancing, current integration algorithms, overcurrent protection, overvoltage protection, overcharge protection, over-discharge protection, high and low temperature protection, and short-circuit protection. Through the circuit structure on the PCB board, it can automatically detect the voltage difference between the battery cells and transfer excess charge from high-voltage cells to low-voltage cells in a timely manner, effectively suppressing voltage difference generation and delaying battery aging. This avoids undercharging or overcharging of some batteries in the battery pack due to voltage differences. This not only ensures the actual usable capacity of the battery pack but also delays battery aging, extends battery life, reduces battery replacement costs, and improves the overall cost-effectiveness of battery use.

[0014] The lower and upper shells are connected by clips and slots, and further secured with mounting bolts. This detachable connection method facilitates module installation and maintenance. The inner shell is connected to the lower shell via springs, and a rubber block inside the lower shell contacts the inner shell. When the module is subjected to vibration or impact, the springs and rubber block provide good cushioning, protecting the module from damage and improving its stability and reliability. Simultaneously, the lower shell's dimensions are larger than the gap created by the inner shell, providing space for heat dissipation and wiring, thus improving the module's heat dissipation performance and ensuring the battery operates in a suitable temperature environment, further extending battery life. Furthermore, multiple insulating plates between the module body and the inner shell enhance the module's insulation performance, reduce the risk of short circuits, and improve safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the battery compartment and the lithium battery module after they have been separated.

[0016] Figure 2 This is a schematic diagram of the assembled lithium battery module;

[0017] Figure 3 This is a schematic diagram of the structure of a disassembled lithium battery module;

[0018] Figure 4 This is a structural diagram of the protective board template after disassembly;

[0019] Figure 5 This is a schematic diagram of the lower shell structure;

[0020] Figure 6 This is a schematic diagram of the upper shell structure;

[0021] Figure 7 This is a schematic diagram of the connecting groove;

[0022] Figure 8 yes Figure 3 A magnified view of a portion of region a.

[0023] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows:

[0024] 11. Lower shell; 12. Upper shell; 13. Mounting slot; 14. Rubber block; 15. Limiting block; 16. Connecting buckle; 17. Connecting slot; 21. Module body; 22. Inner shell; 23. Spring component; 24. Socket; 31. Adapter plate; 32. Protective plate template; 33. Insulating plate; 34. Automatic fire extinguishing module; 41. Top cover; 42. Lower cover; 43. PCB board; 51. Battery compartment; 52. Lithium battery module. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model. Example

[0026] like Figures 1 to 8As shown, this utility model provides a flexible combination lithium battery module, consisting of a battery compartment 51 and multiple sets of lithium battery modules 52 installed inside it. Each set of lithium battery modules 52 exists independently, which gives it high flexibility. It can be installed in various irregularly shaped battery compartments 51 according to different arrangements as needed. For example, in a long and narrow battery compartment 51, the lithium battery modules 52 can be arranged closely in sequence; in an irregular polygonal battery compartment 51, they can be flexibly combined according to the shape of the corners. The battery compartment 51 shown in the figure is only for demonstration purposes. In actual application scenarios, the shape and size of the battery compartment 51 will be more diverse and complex, and the lithium battery modules 52 can be arranged and installed to fit. Each set of lithium battery modules 52 includes a lower shell 11, an upper shell 12, and a module body 21. The lower shell 11 and the upper shell 12 are connected to each other to form a main cavity, which provides space for other internal components. An inner shell 22, a connecting plate 31, and an automatic fire extinguishing module 34 are arranged inside the main cavity. The inner shell 22 is connected to the lower shell 11 via a spring member 23, which serves as both a connector and a buffer. The module body 21 is installed inside the inner shell 22 using the spring member 23. This installation method provides some buffering protection for the module body 21 when subjected to external vibrations or impacts. Simultaneously, the adapter plate 31 facilitates the connection of circuits between different components, providing convenience for the internal circuit connections of the lithium battery module 52 and enabling smooth power transmission and signal interaction between various components. Furthermore, during the charging and discharging process, the lithium battery may overheat or even catch fire due to abnormal conditions such as short circuits or overcharging. The built-in automatic fire suppression module 34 can monitor environmental parameters such as temperature and smoke within the main body cavity in real time. Once an abnormal temperature rise or fire warning signal such as smoke is detected, it will activate the fire suppression mechanism. This module is equipped with a high-efficiency fire extinguishing agent storage device. When fire extinguishing conditions are triggered, the fire extinguishing agent will be sprayed through specific nozzles, playing a role in suppressing the spread of fire. A mounting slot 13 is provided on the upper shell 12, and a socket 24 and a connector are provided in the mounting slot 13. Through the socket 24 and the connector, external devices can be connected to realize functions such as power transmission or data interaction between the lithium battery module 52 and other devices. The combined lithium battery module is equipped with a protection board template 32, which is electrically connected to multiple lithium battery modules 52. It monitors the operating status of the lithium battery modules 52 in real time. In case of abnormal conditions, it can realize active balancing operation of the lithium battery modules 52 to ensure the stable operation and safe use of the lithium battery modules 52.

[0027] like Figure 3 , Figure 4As shown, the protection board template 32 comprises an upper cover 41 and a lower cover 42, which are detachably connected to form a mounting cavity. A PCB board 43, the core component of the protection board template 32, is placed inside the mounting cavity. The PCB board 43 is electrically connected to the module body 21 via circuitry. The PCB board 43 is connected to the lithium battery module 52 and can be equipped with positioning and Bluetooth functions, enabling active balancing. Through the circuit structure on the PCB board 43, the voltage difference between the battery cells can be automatically detected, and excess power from high-voltage cells can be transferred to low-voltage cells in a timely manner, effectively suppressing voltage difference generation and delaying battery aging. This avoids undercharging or overcharging of some batteries in the battery pack due to voltage differences. This not only ensures the actual usable capacity of the battery pack and delays battery aging and lifespan, but also reduces the cost of battery replacement and improves the overall cost-effectiveness of battery use.

[0028] like Figure 5 As shown, multiple sets of limiting blocks 15 are provided inside the lower shell 11, and the spring component 23 is locked between the multiple sets of limiting blocks 15, thus fixing the position of the spring component 23 and preventing it from shaking arbitrarily. Multiple sets of connecting holes are provided on both the lower shell 11 and the spring component 23. When the connecting bolt passes through these connecting holes, the spring component 23 is detachably connected to the lower shell 11. This detachable connection method facilitates the replacement or repair of the spring component 23 in the future. When the spring component 23 malfunctions, it can be easily removed simply by removing the connecting bolt.

[0029] The lower shell 11 is longer and wider than the inner shell 22, creating a gap between them. Multiple sets of rubber blocks 14 are installed inside the lower shell 11, and these blocks contact the inner shell 22. When the lithium battery module 52 is subjected to vibration or impact, the rubber blocks 14 act as a buffer, reducing the impact force on the inner shell 22 and thus protecting both the inner shell 22 and the module body 21 installed within it.

[0030] like Figure 3 , Figure 6 , Figure 7 As shown, the upper shell 12 has a connecting buckle 16 at its bottom, and the lower shell 11 has a connecting groove 17 corresponding to the connecting buckle 16. When the connecting buckle 16 is engaged in the connecting groove 17, the upper shell 12 and the lower shell 11 are connected together. Simultaneously, both the upper shell 12 and the lower shell 11 have multiple sets of mounting holes, through which mounting bolts are inserted, further strengthening the connection between the upper shell 12 and the lower shell 11. This not only facilitates the assembly of the lithium battery module 52 but also allows for easy separation of the upper shell 12 and the lower shell 11 when internal components need to be inspected or repaired. Through these components and connection methods, the entire lithium battery module 52 ensures its structural stability and ease of use.

[0031] Multiple sets of insulating plates 33 are provided between the module body 21 and the inner shell 22, effectively isolating the module body 21 and the inner shell 22. Since the battery generates current during operation, direct contact between the module body 21 and the inner shell 22 could lead to leakage. The insulating plates 33 prevent current from being conducted to the inner shell 22, thus avoiding the safety hazards caused by leakage and ensuring the safety of the entire lithium battery module 52 during operation, providing a strong guarantee for the stable operation of the lithium battery module 52.

[0032] The specific usage and function of this embodiment are as follows:

[0033] In use, connecting external devices via socket 24 enables power transmission or data exchange between the lithium battery module 52 and other devices. During operation, the PCB board 43 of the protection board template 32 automatically detects the cell voltage difference, activates the active balancing function, and transfers excess power from high-voltage cells to low-voltage cells as needed to ensure stable battery pack operation. When the lithium battery module 52 is subjected to vibration or impact, the spring 23 and rubber block 14 act as a buffer to protect the module body 21. If the lithium battery module 52 malfunctions and requires repair, the mounting bolts can be removed to separate the upper shell 12 from the lower shell 11; if components such as the spring 23 need to be replaced, this can also be done by removing the connecting bolts.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A flexible combination lithium battery module, comprising a battery compartment (51) and a plurality of lithium battery modules (52) installed inside the battery compartment, characterized in that: The lithium battery module (52) comprises a lower shell (11), an upper shell (12) and a module body (21), the lower shell (11) and the upper shell (12) are connected to form a main body cavity, an inner shell (22), an adapter plate (31) and an automatic fire extinguishing module (34) are arranged in the main body cavity, the inner shell (22) is connected with the lower shell (11) through a spring member (23), and the module body (21) is arranged in the inner shell (22); a mounting groove (13) is formed in the upper shell (12), a socket (24) and a connector are arranged in the mounting groove (13), the combined lithium battery module is provided with a protection plate template (32), and the protection plate template (32) is electrically connected with a plurality of lithium battery modules (52).

2. The flexible combined lithium battery module according to claim 1, characterized in that: The protection plate template (32) comprises an upper cover (41) and a lower cover (42), which are detachably connected to form a mounting cavity, and a PCB board (43) is arranged in the mounting cavity, and the PCB board (43) is electrically connected with the lithium battery module (52).

3. The flexible combined lithium battery module of claim 1, wherein: A plurality of limiting blocks (15) are arranged in the lower shell (11), the spring member (23) is clamped between the limiting blocks (15), a plurality of connecting holes are formed in the spring member (23) and the lower shell (11), connecting bolts are arranged in the connecting holes, and the spring member (23) and the lower shell (11) are detachably connected.

4. The flexible combined lithium battery module of claim 3, wherein: The length and width of the lower shell (11) are greater than those of the inner shell (22), a gap is formed between the lower shell (11) and the inner shell (22), and a plurality of rubber blocks (14) are arranged in the lower shell (11) and in contact with the inner shell (22).

5. The flexible combined lithium battery module of claim 1, wherein: A connecting buckle (16) is arranged at the bottom of the upper shell (12), a connecting groove (17) is formed in the lower shell (11) corresponding to the connecting buckle (16), and the connecting buckle (16) is clamped in the connecting groove (17); a plurality of mounting holes are formed in the upper shell (12) and the lower shell (11), mounting bolts are arranged in the mounting holes, and the upper shell (12) and the lower shell (11) are detachably connected.

6. The flexible combined lithium battery module of claim 5, wherein: A plurality of insulating plates (33) are arranged between the module body (21) and the inner shell (22).

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