A power lithium battery module and a combined battery pack

Abstract

This utility model discloses a power lithium battery module, including a housing. Multiple battery cells are evenly installed inside the housing, and a cell support is mounted above each cell. An aluminum palladium layer, Mylar film, and a protection board are sequentially mounted above the cell support. A cover plate is installed on the top of the housing. Dual communication interfaces combined with communication plugs reduce the number of wiring harnesses and the risk of failure. A dedicated balancing interface enables active balancing to reduce energy consumption and extend cell life. Alarm lights and alarm through-holes facilitate quick fault diagnosis. It can be flexibly adapted to various scenario requirements through series modules, and combined with a controller to achieve centralized global management to ensure overall operational safety. The overall design is streamlined, easy to assemble, has an IP67 waterproof rating, and includes heating and communication functions. Each module can be connected in series with 4 to 12 cells, and different modules can be freely combined in series.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a power lithium battery module and a combined battery pack. Background Technology

[0002] In the field of power lithium battery technology, the mainstream application solution is to form a high-capacity battery pack by connecting multiple modules in series, but traditional power lithium battery modules have certain defects.

[0003] Traditional power lithium battery module communication interface designs are limited, typically featuring only a single communication interface. When multiple modules are connected in series, each module's interface must be connected to the controller via an independent wiring harness, resulting in a large number of wiring harnesses, high integration difficulty, increased failure risk, and weak system scalability.

[0004] There are also shortcomings in cell balancing solutions. They generally lack dedicated balancing interfaces and rely solely on passive balancing circuits. By consuming excess electrical energy through resistors, they can balance cell voltage, resulting in problems such as high energy loss, slow balancing speed, limited effectiveness, and no active intervention capability.

[0005] Meanwhile, the fault indication methods of traditional lithium battery modules are also inadequate. Most modules require connection through specialized equipment to read fault information, making it difficult for staff to intuitively and quickly determine whether the module is abnormal.

[0006] These defects limit the operating efficiency, safety performance, and service life of the battery pack.

[0007] To address this, a power lithium battery module and a combined battery pack are proposed. Summary of the Invention

[0008] The purpose of this invention is to provide a power lithium battery module and a combined battery pack to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a power lithium battery module, including a housing, wherein multiple battery cells are uniformly installed inside the housing, a battery cell support is installed above the multiple battery cells, and an aluminum palladium, Mylar sheet and a protection plate are sequentially installed above the battery cell support, and a cover plate is installed on the top of the housing;

[0010] The protection board is equipped with two communication interfaces and an equalization interface, both of which penetrate the upper surface of the cover plate. Communication plugs for communication serialization are inserted into the communication interfaces.

[0011] Preferably, a heating film is installed at the bottom of the battery cell.

[0012] Preferably, positive and negative terminals are symmetrically installed on both sides of the upper surface of the protective plate, and the positive and negative terminals penetrate the upper surface of the cover plate.

[0013] Preferably, the protection plate is also equipped with an alarm light, and the cover plate has an alarm through hole for easy observation of the light.

[0014] A combined battery pack employing any of the above-described power lithium battery modules is formed by connecting multiple of the above-described lithium battery modules in series.

[0015] Preferably, a wiring harness connects the communication plugs on two adjacent lithium battery modules.

[0016] Preferably, a controller is connected in series with multiple lithium battery modules, and the controller is connected to a communication plug-in via a wiring harness.

[0017] Compared with existing technologies, the advantages of this utility model are: dual communication interfaces combined with communication plugs reduce the number of wire harnesses and the risk of failure; a dedicated balancing interface enables active balancing to reduce energy consumption and extend cell life; alarm lights and alarm through-holes facilitate quick fault diagnosis; it can be flexibly adapted to various scenario requirements through series modules, and combined with a controller to achieve global centralized management to ensure overall operational safety; the overall design simplifies materials, facilitates assembly, has an IP67 waterproof rating, and includes heating and communication functions; each module can be connected in series with 4 to 12 strings, and different modules can be freely combined in series. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the lithium battery module of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the protective plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the combined battery pack of this utility model.

[0021] In the diagram: 1. Housing; 2. Heating film; 3. Battery cell; 4. Battery cell bracket; 5. Aluminum palladium; 6. Mylar film; 7. Protection board; 8. Communication interface; 9. Positive and negative terminals; 10. Equalization interface; 11. Cover plate; 12. Communication plug; 13. NFC coil; 14. Controller; 15. Alarm light; 16. Alarm through hole. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figures 1-3This utility model provides a technical solution: a power lithium battery module, including a housing 1 made of plastic, which reduces weight. The housing 1 serves as the external protective and support structure for the entire module, providing installation space and protection for internal components, preventing them from being affected by external impacts, dust, and moisture. Multiple battery cells 3 are evenly installed inside the housing 1. The appearance of the battery cells 3 is not limited to cylindrical, square, or pouch cells. The battery cells 3 are the core energy storage components of the module; their even arrangement ensures the stability of energy storage and release, and also facilitates uniform heat distribution.

[0024] A cell support 4 is installed above multiple battery cells 3. The cell support 4 positions and fixes the battery cells 3, preventing displacement or collision due to vibration or shaking during use, and ensuring the stability of the battery cells 3 during operation. Above the cell support 4, an aluminum palladium 5, a Mylar sheet 6, and a protection board 7 are installed in sequence. The aluminum palladium 5 facilitates current conduction between the battery cells 3 and the protection board 7. The Mylar sheet 6 has good insulation properties, isolating the aluminum palladium 5 from the protection board 7 to prevent short circuits and ensure circuit safety. The protection board 7 provides protection for the battery cells 3, monitoring parameters such as voltage, current, and temperature. In case of overcharging, over-discharging, overcurrent, or overheating, it promptly cuts off the circuit to prevent damage to the battery cells 3 or safety accidents.

[0025] A cover plate 11 is installed on the top of the housing 1. The cover plate 11 cooperates with the housing 1 to form a closed space, further enhancing the protection of internal components. The waterproof rating is IP67. At the same time, it provides a foundation for the subsequent installation of external interfaces and other components. The overall design simplifies the materials and facilitates assembly. The single module size of different models and various standard lead-acid battery housings are consistent, enabling lead-acid battery replacement without size limitations. Compared with lead-acid batteries, it has a higher capacity and is lighter.

[0026] The protection board 7 is equipped with two communication interfaces 8 and an equalization interface 10. The two communication interfaces 8 enable signal transmission between the lithium battery module and other modules or control devices, facilitating multi-module collaborative work and data interaction. The equalization interface 10 is used to connect an equalization device, which has lithium battery equalization functions, supporting both active and passive equalization. During the series connection of multiple battery cells 3, the equalization device adjusts the voltage of each battery cell 3 to ensure that the voltage of each battery cell 3 is consistent, preventing voltage imbalances from affecting the overall performance and lifespan of the module.

[0027] Both communication interfaces 8 and the equalization interface 10 extend through the upper surface of the cover plate 11. This design facilitates the connection of external devices to the interfaces without disassembling the cover plate 11, simplifying the operation process. A communication plug-in 12 for series communication is inserted into the communication interface 8. The communication plug-in 12 enables rapid docking of the communication interfaces 8 between adjacent lithium battery modules, ensuring the stability and reliability of signal transmission when multiple modules are connected in series, and facilitating the combination to form a larger capacity battery pack.

[0028] like Figure 1 As shown: A heating film 2 is installed at the bottom of the battery cell 3. The heating film 2 serves as a heating component. In low-temperature environments, it can provide heat to the battery cell 3 by generating heat through electricity, thereby maintaining the battery cell 3 within a suitable operating temperature range.

[0029] like Figure 1 As shown: Positive and negative terminals 9 are symmetrically installed on both sides of the upper surface of the protection plate 7. The positive and negative terminals 9 are conductive components that connect the lithium battery module to external electrical equipment. The positive and negative terminals 9 penetrate the upper surface of the cover plate 11, which facilitates quick connection between the electrodes of external electrical equipment and the positive and negative terminals 9, and also facilitates the series operation between multiple lithium battery modules.

[0030] like Figure 1 As shown: An alarm light 15 is also installed on the protection board 7. The alarm light 15 is connected to the monitoring circuit of the protection board 7. When the protection board 7 detects abnormal conditions such as overcharging, over-discharging, overcurrent, or overheating in the battery cell 3, it will control the alarm light 15 to light up or flash, providing a direct light signal to remind staff that the module is faulty. This facilitates timely detection and repair, preventing the fault from escalating. An alarm through-hole 16 is provided on the cover plate 11 for easy observation of the light. The alarm through-hole 16 corresponds to the position of the alarm light 15. Staff can clearly observe the working status of the alarm light 15 through the alarm through-hole 16 without removing the cover plate 11, and promptly obtain fault information of the module.

[0031] like Figure 2 As shown: The protection board 7 also has an NFC coil 13 for wireless communication and an NFC reader chip for identifying the NFC coil 13. In addition to the already installed communication interface 8, equalization interface 10, positive and negative terminals 9, and alarm light 15, the protection board 7 of the power lithium battery module also has an NFC coil 13 for wireless communication and an NFC reader chip for identifying the NFC coil 13. These two components work together to form the module's wireless data interaction unit, supplementing the information transmission and maintenance management of the lithium battery module with a wireless communication dimension. This allows the protection board 7 to transmit core data collected, such as the real-time voltage, operating temperature, remaining charge, historical charge / discharge records, and fault codes of the battery cell 3.

[0032] The protection board 7 also features a Bluetooth module for wireless communication, which can be linked with the core monitoring functions of the protection board to synchronize dynamic data such as cell voltage and temperature in real time, and push fault information in case of abnormalities. Together with the dual communication interface and active balancing interface, this design enhances the safety, stability, and maintenance efficiency of the battery system.

[0033] A combined battery pack is formed by connecting multiple lithium battery modules as described above in series. By connecting multiple lithium battery modules in series, the total voltage and total capacity of the combined battery pack can be flexibly adjusted according to actual power demand, meeting the needs of electrical equipment with different power and range requirements, such as electric vehicles and energy storage devices. It features a modular design, with each module consisting of 4 to 12 modules connected in series, allowing for arbitrary combination and connection of different modules.

[0034] like Figure 3 As shown: A wire harness connects the communication plug-in 12 on two adjacent lithium battery modules. The wire harness serves as a carrier for signal transmission, enabling stable signal interaction between the two adjacent lithium battery modules and ensuring smooth communication between the modules.

[0035] like Figure 3 As shown: A controller 14 is connected in series with multiple lithium battery modules. The controller 14 serves as the control core of the battery pack, enabling centralized monitoring and management of the operating status of each lithium battery module within the pack. It collects real-time information such as voltage, current, temperature, and remaining charge of each module, and controls the charging and discharging process of the battery pack based on the collected information, ensuring that the battery pack operates within a safe and efficient range. The controller 14 is connected to a communication plug-in 12 via a wiring harness. This connection method allows the controller 14 to achieve fast and stable signal transmission with the lithium battery modules, facilitating the timely acquisition of operating data from each module and the sending of control commands to each module. This enables precise control of the battery pack, improving its overall performance and safety.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power lithium battery module, comprising a housing (1), characterized in that: Multiple battery cells (3) are uniformly installed inside the housing (1). A battery cell support (4) is installed above the multiple battery cells (3). An aluminum palladium (5), a Mylar sheet (6), and a protective plate (7) are installed sequentially above the battery cell support (4). A cover plate (11) is installed on the top of the housing (1). The protection plate (7) is equipped with two communication interfaces (8) and an equalization interface (10). Both communication interfaces (8) and equalization interface (10) penetrate the upper surface of the cover plate (11). A communication plug (12) for communication serialization is inserted into the communication interface (8).

2. A power lithium battery module according to claim 1, characterized in that: A heating film (2) is installed at the bottom of the battery cell (3).

3. A power lithium battery module according to claim 1, characterized in that: Positive and negative terminals (9) are symmetrically installed on both sides of the upper surface of the protective plate (7), and the positive and negative terminals (9) penetrate the upper surface of the cover plate (11).

4. A power lithium battery module according to claim 1, characterized in that: An alarm light (15) is also installed on the protective plate (7), and an alarm through hole (16) is provided on the cover plate (11) to facilitate observation of the light.

5. A combined battery pack employing the power lithium battery module described in any one of claims 1-4, characterized in that: It is formed by connecting multiple lithium battery modules as described in any one of claims 1-4.

6. A combined battery pack according to claim 5, characterized in that: A wire harness connects the communication plugs (12) on two adjacent lithium battery modules.

7. A combined battery pack according to claim 6, characterized in that: A controller (14) is connected in series to multiple lithium battery modules, and the controller (14) is connected to a communication plug-in (12) via a wiring harness.

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