Split type modular battery pack

Abstract

The invention discloses a split type modular battery pack which comprises a first battery module, a second battery module, an external battery management system (BMS), a first connecting device and a second connecting device, the first connecting device is electrically connected with the first battery module and the external battery management system BMS respectively; the second connecting device is electrically connected with the second battery module and the external battery management system BMS respectively; and the external battery management system BMS is connected with the system total output interface. According to the invention, the split battery module is adopted, and a special communication battery cell is replaced by the energy storage battery cell, so that the weight of a single package can be effectively reduced, and transportation and carrying are facilitated; meanwhile, the cost of the system can be remarkably reduced, the overall performance of the system is effectively improved, the maintenance efficiency can be effectively improved, and the maintenance cost is reduced; moreover, a modularized split type setting mode is adopted, so that a user can adjust the configuration of the battery capacity according to actual requirements, and the configuration flexibility is relatively high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of batteries, and particularly relates to a split modular battery pack. BACKGROUND

[0002] With the rapid development of energy storage technology, the cost of energy storage cells is continuously decreasing, which is lower than the price of traditional communication base station dedicated battery cells. Applying energy storage cells to the battery pack of a communication base station can significantly reduce the cost of the battery pack, and the performance of the energy storage cells is superior to that of standby cells.

[0003] The standard working voltage of a communication base station is 48V, and 15-16 series of lithium batteries are usually required to be connected in series to meet the voltage requirement. However, due to the large number of lithium batteries required to be connected in series, the battery pack in the prior art often has the following problems: (1) the overall battery pack is large in size and heavy in weight, and is difficult to transport and install; (2) when a cell or module in the battery pack fails, the entire battery pack needs to be replaced, resulting in high maintenance cost and low efficiency; (3) the battery management system (BMS) has high integration with the battery pack, and fault diagnosis and maintenance are inconvenient; (4) the battery capacity cannot be flexibly configured according to actual needs. Therefore, there is an urgent need for a new communication base station battery pack that can solve the above problems. SUMMARY

[0004] The embodiment of the present application provides a split modular battery pack, which aims to solve the problems of the existing battery pack, such as large overall size, heavy weight, difficult transportation and installation, high maintenance cost, low maintenance efficiency, inconvenient fault diagnosis and maintenance, and inability to flexibly configure battery capacity according to actual needs.

[0005] To solve the above technical problems, the embodiment of the present application provides a split modular battery pack, which comprises a first battery module, a second battery module, an external battery management system (BMS), a first connecting device and a second connecting device. The first connecting device is electrically connected with the first battery module and the external BMS respectively. The second connecting device is electrically connected with the second battery module and the external BMS respectively. The external BMS is connected with a system total output interface.

[0006] As a preferred embodiment, the first battery module comprises a plurality of first battery cells connected in series; and the second battery module comprises a plurality of second battery cells connected in series.

[0007] As a preferred embodiment, the first battery cells and the second battery cells are both lithium iron phosphate cells, and the nominal voltage of a single lithium iron phosphate cell is 3.2V.

[0008] As a preferred implementation, the first battery module and the second battery module have the same structure and electrical parameters, and the first battery module and the second battery module are independently arranged.

[0009] As a preferred implementation, the first battery module is an 8-string or 4-string connected battery module; and the second battery module is an 8-string or 4-string connected battery module.

[0010] As a preferred implementation, the first battery module is provided with 1-2; when the first battery module is provided with 2, the two first battery modules are respectively connected with the external battery management system BMS.

[0011] As a preferred implementation, the second battery module is provided with 1-2; when the second battery module is provided with 2, the two second battery modules are respectively connected with the external battery management system BMS. In this way, the external battery management system BMS of the present application can be combined with 1-4 battery modules, which can be applied to different voltage levels.

[0012] As a preferred implementation, the external battery management system BMS is independently arranged relative to the first battery module / second battery module. Through the external battery management system BMS, the working state of the first battery module and the second battery module can be monitored and managed.

[0013] As a preferred implementation, the external battery management system BMS is respectively arranged in adaptation with the first battery module and the second battery module; a fault diagnosis and alarm module is arranged in the external battery management system BMS, and the fault diagnosis and alarm module is respectively connected with the first battery module and the second battery module. In this way, the external battery management system BMS can monitor each battery module independently and quickly locate the battery module that fails.

[0014] As a preferred implementation, a remote monitoring and management module is arranged in the external battery management system BMS, and the remote monitoring and management module is respectively connected with the first battery module and the second battery module.

[0015] As a preferred implementation, the output voltage of the system total output interface is 48V.

[0016] As a preferred implementation, the first connecting device and the second connecting device are both quick plug connecting devices; the quick plug connecting device is a quick plug connecting device with anti-reverse connection protection function.

[0017] Compared with the prior art, the technical scheme of the embodiment of the application has the following beneficial effects: the application adopts a split battery module, and uses an energy storage cell to replace a special communication cell, so that the weight of a single package can be effectively reduced, and transportation and carrying are facilitated; meanwhile, the cost of the system can be significantly reduced, and the overall performance of the system can be effectively improved. Through the modular split setting, the faulty battery module can be replaced alone, so that the maintenance efficiency can be effectively improved, and the maintenance cost can be reduced; and the modular split setting mode enables the user to adjust the configuration of the battery capacity according to actual needs, and has high configuration flexibility. The battery management system BMS is set in an external manner, so that the system is convenient for upgrading and maintenance, intelligent management, and more perfect monitoring function. The application has the advantages of simple structure, convenient disassembly and assembly, good stability, economic safety, practicality, and the like, and does not need to be greatly improved in structure, can be realized, can be used for large-scale production application, and can effectively solve the technical problems of difficult transportation, high maintenance cost and inflexible configuration of the battery module in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and the drawings shown can be obtained by those skilled in the art without any creative effort.

[0019] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a split modular battery pack according to an embodiment of the application.

[0020] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without any creative effort are within the protection scope of the application.

[0022] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the application.

[0023] Specifically, as shown in FIG. 1, the battery module 1 is a split modular battery module, which includes a plurality of battery modules 11, and each battery module 11 is connected to a battery management system BMS 12. Figure 1As shown, the embodiment of the present application provides a split type modular battery pack, which comprises a first battery module 10, a second battery module 20, an external battery management system BMS 30, a first connecting device 40 and a second connecting device 50; the first connecting device 40 is electrically connected with the first battery module 10 and the external battery management system BMS 30 respectively; the second connecting device 50 is electrically connected with the second battery module 20 and the external battery management system BMS 30 respectively; and the external battery management system BMS 30 is connected with a system total output interface 60.

[0024] As a preferred embodiment, the first battery module 10 comprises a plurality of first battery cells 11 connected in series; and the second battery module 20 comprises a plurality of second battery cells 21 connected in series.

[0025] As a preferred embodiment, the first battery cell 11 and the second battery cell 21 are both lithium iron phosphate battery cells; and the single nominal voltage of the lithium iron phosphate battery cell is 3.2V. In the embodiment of the present application, the battery cell has high cycle life and safety performance, which facilitates to provide the overall performance of the system.

[0026] The present application adopts split type battery modules, uses energy storage battery cells to replace special communication battery cells, which can effectively reduce the weight of a single package, facilitate transportation and handling; at the same time, can significantly reduce the cost of the system, and effectively improve the overall performance of the system.

[0027] As a preferred embodiment, the first battery module 10 and the second battery module 20 have the same structure and electrical parameters, and the first battery module 10 and the second battery module 20 are independently arranged. In this way, the first battery module 10 and the second battery module 20 can be independently transported and installed, which has good transportation convenience and installation convenience.

[0028] The present application adopts modular split type arrangement, so that the faulty battery module can be replaced individually, which can effectively improve the maintenance efficiency and reduce the maintenance cost; and the modular split type arrangement mode enables the user to adjust the configuration of the battery capacity according to the actual demand, which has high configuration flexibility.

[0029] As a preferred embodiment, the first battery module 10 is an 8-string (output rated voltage is 25.6V) or 4-string (output rated voltage is 12.8V) connected battery module; and the second battery module 20 is an 8-string (output rated voltage is 25.6V) or 4-string (output rated voltage is 12.8V) connected battery module.

[0030] For example, in the embodiment, the first battery module 10 includes 8 lithium iron phosphate energy storage cells with a nominal voltage of 3.2V, the cells are connected in series, the rated voltage of the first battery module is 25.6V, the module shell is made of flame-retardant ABS material, and the module is provided with a temperature sensor and a voltage collection wire harness. The structure of the second battery module 20 is the same as that of the first battery module 10. As a preferred embodiment, the first battery module 10 is provided with 1-2; when the first battery module 10 is provided with 2, the two first battery modules 10 are respectively connected with the external battery management system BMS 30. Each first battery module is provided with an independent connector interface.

[0031] As a preferred embodiment, the second battery module 20 is provided with 1-2; when the second battery module 20 is provided with 2, the two second battery modules 20 are respectively connected with the external battery management system BMS 30. Each second battery module is provided with an independent connector interface. In this way, the external battery management system BMS 30 of the application can be combined with 1-4 battery modules, which can be applied to different voltage levels.

[0032] As a preferred embodiment, the external battery management system BMS 30 is independently provided relative to the first battery module 10 / the second battery module 20. Through the external battery management system BMS 30, the working state of the first battery module 10 and the second battery module 20 can be monitored and managed. The battery management system BMS is set in an external manner, which is convenient for upgrading and maintenance, intelligent management, and more perfect monitoring function.

[0033] In the embodiment, the external battery management system BMS 30 adopts a 32-bit ARM processor, has a 16-string battery monitoring capability, supports CAN and RS485 communication protocols, and has functions such as charge and discharge control, temperature protection, overvoltage and undervoltage protection.

[0034] As a preferred embodiment, the external battery management system BMS 30 is respectively adapted to be provided with the first battery module 10 and the second battery module 20; the external battery management system BMS 30 is provided with a fault diagnosis and alarm module (not marked in the figure), and the fault diagnosis and alarm module is respectively connected with the first battery module 10 and the second battery module 20. In this way, the external battery management system BMS 30 can monitor each battery module separately and quickly locate the battery module that fails.

[0035] As a preferred embodiment, the external battery management system BMS 30 is provided with a remote monitoring and management module (not marked in the figure), and the remote monitoring and management module is respectively connected with the first battery module 10 and the second battery module 20.

[0036] As a preferred embodiment, the output voltage of the system total output interface 60 is 48V.

[0037] As a preferred embodiment, the first connecting device 40 and the second connecting device 50 are both quick plug connecting devices; the quick plug connecting device is a quick plug connecting device with reverse connection protection function. The connection is reliable and the contact resistance is small through the first connecting device 40 and the second connecting device 50. In the embodiment of the application, the first connecting device 40 and the second connecting device 50 adopt aviation plug connection mode, the plug rated current is 150A, and has waterproof and dustproof function (IP65).

[0038] The application has the advantages of simple structure, convenient disassembly and assembly, good stability, economy, safety, practicality, no need to make great improvement on the structure of the battery module, can be used for large-scale production and application, and can effectively solve the technical problems of difficult transportation, high maintenance cost and inflexible configuration of the battery module in the prior art.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A split modular battery pack, characterized by, The application relates to a battery management system (BMS) and a system total output interface.

2. The split modular battery pack of claim 1, wherein, The first battery module comprises a plurality of first battery cells connected in series; and the second battery module comprises a plurality of second battery cells connected in series.

3. The split modular battery pack of claim 2, wherein, The first battery cells and the second battery cells are both lithium iron phosphate battery cells, and the single-cell nominal voltage of the lithium iron phosphate battery cells is 3.2 V.

4. The split modular battery pack of claim 1, wherein, The first battery module and the second battery module have the same structure and electrical parameters, and the first battery module and the second battery module are independently arranged.

5. The split modular battery pack of claim 1, wherein, The first battery module is an 8-string or 4-string battery module; and the second battery module is an 8-string or 4-string battery module.

6. The split modular battery pack of claim 1, wherein, The first battery module is provided with 1-2 first battery modules; when the first battery module is provided with two first battery modules, the two first battery modules are respectively connected with the external battery management system (BMS). The second battery module is provided with 1-2 second battery modules; when the second battery module is provided with two second battery modules, the two second battery modules are respectively connected with the external battery management system (BMS).

7. The split modular battery pack of claim 1, wherein, The external battery management system (BMS) is independently arranged relative to the first battery module / second battery module.

8. The split modular battery pack of claim 1, wherein, The external battery management system (BMS) is respectively matched with the first battery module and the second battery module; a fault diagnosis and alarm module is arranged in the external battery management system (BMS), and the fault diagnosis and alarm module is respectively connected with the first battery module and the second battery module.

9. The split modular battery pack of claim 1, wherein, A remote monitoring and management module is arranged in the external battery management system (BMS), and the remote monitoring and management module is respectively connected with the first battery module and the second battery module.

10. The split modular battery pack of claim 1, wherein, The output voltage of the system total output interface is 48 V. The first connecting device and the second connecting device are both quick plug connecting devices; and the quick plug connecting device is a quick plug connecting device with anti-reverse connection protection function.

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