Battery management system and electric device

Abstract

The utility model provides a battery management system and an electric device, the battery management system comprises a main control board, the main control board is provided with a control chip and a communication module; the control chip is electrically connected with the communication module, the control chip is used for sending the battery running state information collected by the main control board to the communication module, the communication module is used for sending the battery running state information to other devices, and the existing battery management technology and the wireless communication and mobile communication functions achieved in the communication module are integrated. And a communication module circuit board needs to be arranged outside the battery management system. Compared with the prior art, the battery management system has the advantages that the communication module is directly arranged on the main control board, the main control chip is integrated in the communication module, an original control chip is replaced, the control chip on the main control board is saved, and the battery management system does not need to be additionally provided with a communication module circuit board independently; the wireless and mobile communication functions can be realized by using the circuit board, the use quantity of the circuit board is reduced, the production cost and the material cost of the battery management system can be saved, and the production efficiency is improved. Meanwhile, the battery management system only needs to execute one-time program burning on the main control board, the working procedure is simplified, and the production efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery management system and an electric device. Background Art

[0002] The battery management system can intelligently manage and maintain each battery unit, monitor the battery's current, voltage, temperature, etc., prevent the battery from being overcharged or over-discharged, and ensure the battery's safe use. The battery management system is usually closely integrated with the electric vehicle's power battery pack. Merchants who operate and maintain the battery pack can remotely obtain the operating status and location information of the battery pack on the electric vehicle through wireless communication, ensuring the normal supply of the battery pack and preventing the battery pack from being lost.

[0003] In the prior art, the battery management system on electric vehicles often adopts a hardware solution of connecting a BMS (Battery Management System) board to an IoT board. Specifically, two circuit boards are designed, one of which is a BMS board for protecting the safety of battery use, and the other is an IoT board for wireless communication. The two circuit boards are assembled together through plug-in connection to form the battery pack of the electric vehicle together with the battery. However, the above solution requires a large amount of hardware, at least two circuit boards, which is costly, and the two circuit boards need to be programmed and assembled separately, resulting in cumbersome production processes and low production efficiency. Utility Model Content

[0004] In view of this, the utility model provides a battery management system and an electric device, so as to at least solve the problems of high production cost and low production efficiency of the battery management system in the prior art.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] The utility model provides a battery management system, comprising a main control board, on which a control chip and a communication module are arranged;

[0007] The control chip is electrically connected to the communication module. The control chip is used to send the battery operation status information collected by the main control board to the communication module. The communication module is used to send the battery operation status information to other devices.

[0008] Optionally, the control chip and the communication module are integrated into one to form an Internet of Things module.

[0009] Optionally, the communication module includes a mobile communication module and a wireless communication module, and the mobile communication module is electrically connected to the wireless communication module.

[0010] Optionally, the Internet of Things module also includes a positioning module; the positioning module is electrically connected to the communication module, the positioning module is used to obtain the position of the battery, and the communication module is also used to send the position of the battery to other devices.

[0011] Optionally, a power module is also provided on the main control board, and the power module is used to supply power to the main control board and the Internet of Things module.

[0012] Optionally, an AFE module is further provided on the main control board, the AFE module is electrically connected to the control chip, and the AFE module is used to collect the battery operating status information and feed the battery operating status information back to the control chip.

[0013] Optionally, a control switch is further provided on the main control board, the control switch is electrically connected to the AFE module, and the control switch is used to control the on and off of the battery charging and discharging circuit.

[0014] Optionally, a temperature detection module is further provided on the main control board, the temperature detection module is electrically connected to the AFE module, and the temperature detection module is used to detect the temperature of the battery charging and discharging circuit.

[0015] Optionally, a current detection module is further provided on the main control board, the current detection module is electrically connected to the AFE module, and the current detection module is used to detect the current size of the battery charging and discharging circuit.

[0016] Optionally, a communication module is further provided on the main control board, the communication module is electrically connected to the control chip, and the communication module is used to establish communication with an external device.

[0017] Optionally, the Internet of Things module is connected to the main control board through surface mounting technology or through-hole mounting technology.

[0018] The utility model also provides an electrical device, comprising any one of the above-mentioned battery management systems.

[0019] Compared with the prior art, the battery management system and power consumption device described in the utility model have the following advantages:

[0020] The battery management system of the utility model includes a main control board and an Internet of Things module, wherein the Internet of Things module is arranged on the main control board and is electrically connected to the main control board. Compared with the prior art, the battery management system of the utility model directly arranges the Internet of Things module on the main control board, which reduces the number of circuit boards used, helps to save the production cost of the battery management system, and improves production efficiency. At the same time, the battery management system of the utility model only needs to perform a program burning on the main control board once, which simplifies the process and further improves production efficiency.

[0021] Compared with the prior art and the aforementioned battery management system, the power consumption device of the present invention has the same or similar advantages, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of a first battery management system in an embodiment of the utility model;

[0024] Figure 2 is a schematic diagram of a second battery management system in an embodiment of the utility model;

[0025] Figure 3 is a schematic diagram of a third battery management system in an embodiment of the utility model;

[0026] Figure 4 It is a circuit diagram of a battery management system in an embodiment of the utility model;

[0027] Figure 5 It is a circuit diagram of another battery management system in an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0030] It should be understood that the reference to "some embodiments" throughout the specification means that specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the utility model. Therefore, the "in some embodiments" appearing in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0031] The following describes in detail a battery management system and an electric device provided by the present utility model by listing specific embodiments.

[0032] Reference Figure 1 The utility model provides a battery management system, including a main control board 1, on which a control chip 21 and a communication module 22 are arranged; the control chip 21 is electrically connected to the communication module 22, and the control chip 21 is used to send the battery operation status information collected by the main control board to the communication module 22, and the communication module 22 is used to send the battery operation status information to other devices.

[0033] Specifically, the battery management system of the utility model is applied to a battery pack, in which a plurality of battery cells and a battery management system are arranged, and the plurality of battery cells are electrically connected to the battery management system. During the battery charging and discharging process, the battery management system can monitor the battery current, voltage, temperature, etc., to prevent the battery from being overcharged or over-discharged, and ensure the safety of the battery. Figure 1As shown, the battery management system includes a main control board 1, which is the core control board of the battery management system and is essentially a PCB (Printed Circuit Board). The main control board 1 can monitor and collect the operating status information of the battery during the charging and discharging process to prevent the battery from being overcharged or over-discharged, thereby ensuring the safety of the battery. The main control board 1 is provided with a control chip 21 and a communication module 22, and the control chip 21 is electrically connected to the communication module 22. The control chip 21 is essentially an MCU (Micro controller Unit). The MCU appropriately reduces the frequency and specifications of the CPU (Central Process Unit), and integrates the memory bar, counter, USB (Universal Serial Bus), analog-to-digital converter, UART (Universal Asynchronous Receiver / Transmitter), PLC (Programmable logic Controller), DMA (Direct Memory The peripheral interfaces of the controller and the drive circuit of the main control board 1 and the communication module 22 are integrated on a single chip to form a chip-level computer, which can perform different combination controls for different application scenarios to ensure the normal operation of the main control board 1 and the communication module 22. Specifically, the control chip 21 can send the battery operation status information collected by the main control board to the communication module 22, and the communication module 22 can send the battery operation status information to other devices, including external Internet devices or cloud platforms, so that users can remotely obtain the battery operation status information. Other devices also include EMS (Energy Management System), PCS (Power Conversion System, energy storage converter), etc. The battery pack, battery management system, EMS and PCS together constitute an electrochemical energy storage system. The battery pack is composed of multiple battery cells. The battery management system obtains the battery operation status information of the battery pack and shares the battery operation status information with EMS and PCS through the communication module 22. EMS can send the control information to PCS and the battery management system according to the optimization and scheduling decision, so as to control the battery pack to complete the charging and discharging function. It should be noted that the battery operating status information includes the voltage, current, temperature of the battery charging and discharging circuit, and the remaining power and discharged power of the battery.

[0034] In the prior art, the battery management system often adopts a hardware solution of connecting the BMS board to the Internet of Things board, which requires two circuit boards in total. Different electronic components are installed on the two circuit boards to perform different functions. The two circuit boards are assembled together by plugging and unplugging to form a complete battery management system. The battery management system of the utility model directly sets the core component communication module 22 in the Internet of Things board on the main control board 1, which is equivalent to combining the BMS board and the Internet of Things board in the prior art on one circuit board, so that the battery management system only uses one circuit board, which reduces the number of materials and helps to save the production cost of the battery management system. It should be noted that the communication module 22 is set on the main control board 1, which actually means that the communication module 22 is directly electrically connected to the main control board 1. For example, the main control board 1 is provided with a corresponding functional interface for the communication module 22 to connect, and the communication module 22 can directly achieve electrical connection with the main control board 1 through the functional interface. Compared with the prior art, the battery management system of the utility model reduces the number of circuit boards used, and the realization of all functions depends on one circuit board, eliminating the assembly process of multiple circuit boards, thereby helping to save the production cost of the battery management system and improve production efficiency. Of course, when designing, it is necessary to select the communication module 22 so that the communication module 22 is compatible with the main control board 1. In addition, the prior art uses two circuit boards, and before the circuit boards are used, the two circuit boards need to be programmed separately, that is, at least two program programming processes need to be performed, while the utility model uses the main control board 1 as a circuit board, and only one program programming needs to be performed on the main control board 1, which simplifies the process, further saves the production time of the battery management system, and improves production efficiency. In addition, the battery management system of the utility model uses one circuit board, which can also reduce the installation space occupied by the battery management system in the battery pack, which helps to design the battery pack to be lightweight and miniaturized.

[0035] Optionally, the control chip 21 and the communication module 22 are integrated into one to form an Internet of Things module 2.

[0036] Specifically, the utility model uses an integrated Internet of Things module 2, which is a product formed by a packaging process, and fixes the MCU chip and a communication chip such as a 4G chip or a 5G chip on the same substrate, and connects them to each other through ultra-fine metal wires, and then leads out the wiring terminals, and is fixed by encapsulating a plastic insulating medium to form an integrated product. The product has both data calculation and processing functions and data transceiver functions. Of course, in some embodiments, the Internet of Things module 2 can also be an MCU chip integrated with a data transceiver unit, and in other embodiments, the Internet of Things module 2 can also be a communication chip integrated with a data calculation and processing unit. Therefore, the utility model replaces multiple modules used in the prior art to realize separate functions with an integrated Internet of Things module 2, so that the thermal management system has a high degree of integration and a small overall volume, which helps to reduce the space occupied by the Internet of Things module on the main control board 1, thereby improving the effective utilization rate of the main control board 1 and further reducing the production cost of the battery management system. Since the Internet of Things module 2 is arranged on the main control board 1, the control chip 21 in the Internet of Things module 2 can also be used as the control chip 21 of the main control board 1, and can manage and control the working status of each electronic component on the main control board 1. Compared with the prior art, the use of a control chip 21 can be saved, the number of materials can be further reduced, and the production cost of the battery management system can be saved.

[0037] Optionally, refer to Figure 2 The communication module 22 includes a mobile communication module 22 and a wireless communication module 22 , and the mobile communication module 22 is electrically connected to the wireless communication module 22 .

[0038] Specifically, the mobile communication module 221 can be a 4G module or a 5G module. Compared with the 4G module, the 5G module has a higher transmission rate, a larger capacity, and a lower delay, but at the same time has a higher cost. The mobile communication module 22 can be reasonably selected according to actual needs and costs, etc., and this embodiment is not limited to this. The mobile communication module 221 can send the operating status information of the battery obtained by the main control board 1 to an external Internet device or a cloud platform to realize the communication between the battery management system and the external Internet device or cloud platform. The wireless communication module 222 can be a Wifiscan module. The Wifiscan module can also send the operating status information of the battery obtained by the main control board 1 to an external Internet device or a cloud platform to realize the communication between the battery management system and the external Internet device or cloud platform. At the same time, it can scan Wifi signals to determine the approximate location of the battery and realize auxiliary positioning. The mobile communication module 221 is electrically connected to the wireless communication module 222. The communication module 22 can freely switch the mobile communication module 221 or the wireless communication module 222 for use according to the actual situation to ensure effective communication between the battery management system and the external Internet device or cloud platform.

[0039] Optionally, refer to Figure 3 The Internet of Things module 2 also includes a positioning module 23; the positioning module 23 is electrically connected to the communication module 22, the positioning module 23 is used to obtain the position of the battery, and the communication module 22 is also used to send the position of the battery to other devices.

[0040] Specifically, the Internet of Things module 2 also includes a positioning module 23, that is, the Internet of Things module 2 is an integration of a control chip 21, a communication module 22 and a positioning module 23. The positioning module 23 can be a GPS (Global Positioning System) module. The positioning module 23 is electrically connected to the communication module 22. The positioning module 23 can obtain the location information of the battery. The communication module 22 can obtain the location information of the battery from the positioning module 23 and send the location information of the battery to an external Internet device or cloud platform, or to EMS, PCS, etc., so that the external Internet device or cloud platform and EMS, PCS can monitor the location of the battery in real time to ensure the normal supply of the battery and prevent the battery from being lost.

[0041] Optionally, refer to Figures 3 to 5 The main control board 1 is also provided with a power module 3, and the power module 3 is used to supply power to the main control board 1 and the Internet of Things module 2.

[0042] Specifically, in the prior art, a battery management system usually includes two power modules, one power module is arranged on the BMS board for supplying power to the BMS board, and the other power module is arranged on the IoT board for supplying power to the IoT board. Figure 3 As shown, the battery management system may include only one power module 3, which is arranged on the main control board 1 and can simultaneously supply power to the main control board 1 and the Internet of Things module 2 on the main control board 1, thereby further reducing the number of materials and saving the production cost of the battery management system. Figure 4 and Figure 5 As shown, the power module 3 is electrically connected to the positive circuit of the battery charge and discharge circuit. When powering the main control board 1 and the Internet of Things module 2, power can be taken from the positive circuit of the battery charge and discharge circuit, and then the power is supplied to the main control board 1 and the Internet of Things module 2 after voltage reduction conversion.

[0043] Optionally, refer to Figures 3 to 5 The main control board 1 is also provided with an AFE module 11, and the AFE module 11 is electrically connected to the control chip 21. The AFE module 11 is used to collect the battery operation status information and feed back the battery operation status information to the control chip 21.

[0044] Specifically, if Figure 3 As shown, the AFE module 11 is electrically connected to the control chip 21 on the main control board 1. The AFE (Analog Front End) module is an integrated component including a sensor interface, an analog signal conditioning circuit, an analog multi-way switch, a sample and hold, an analog-to-digital conversion circuit, a data cache, and control logic. It is used for signal acquisition and processing. It can convert the collected physical quantities such as the voltage, current, and temperature of the battery 5 into electrical signals, and amplify, filter, sample, quantize, and process the electrical signals so that the control chip 21 can subsequently digitize the signals. The control chip 21 can obtain the operating status information of the battery 5 collected by the AFE module 11, and control the on-off status of the charging and discharging circuit of the battery 5 according to the operating status information.

[0045] Optionally, refer to Figures 3 to 5 The main control board 1 is also provided with a control switch 12, which is electrically connected to the AFE module 11, and is used to control the on and off of the battery charging and discharging circuit.

[0046] Specifically, the control switch 12 can be a MOS tube or a triode. When the control switch 12 is turned on, the charge and discharge circuit of the battery 5 is in a normal working state. When the control switch 12 is turned off, the charge and discharge circuit of the battery 5 is cut off and cannot work normally. The control switch 12 is electrically connected to the AFE module 11. After the control chip 21 on the main control board 1 collects the operating status information of the battery 5 through the AFE module 11, it will determine whether it is necessary to cut off the charge and discharge circuit of the battery according to the operating status information. For example, if the AFE module 11 collects the current of the charge and discharge circuit of the battery 5 that is too large, after the control chip 21 obtains the current information, when it determines that the current of the current charge and discharge circuit is greater than the rated current, it will issue a cut-off instruction to the AFE module 11, so that the AFE module 11 drives the control switch 12 to disconnect, so as to avoid overcurrent in the battery, thereby ensuring the safety of the battery. The above-mentioned rated current is determined according to the specifications of the battery, and the rated currents of batteries of different specifications may be different. Further, if Figure 4 As shown, the control switch 12 can be connected to the positive electrode circuit of the battery 5 charging and discharging circuit, such as Figure 4 Between B+ and P+ in the circuit, the on / off of the battery charging and discharging circuit is controlled by controlling the positive circuit; Figure 5 As shown, the control switch 12 can also be connected to the negative electrode circuit of the battery 5 charge and discharge circuit, such as Figure 5 Between B- and P- in the battery, the on-off of the battery charging and discharging circuit is controlled by controlling the negative electrode circuit. The specific connection position of the control switch 12 is not limited in this embodiment.

[0047] Optionally, refer to Figures 3 to 5The main control board 1 is also provided with a temperature detection module 13, which is electrically connected to the AFE module 11 and is used to detect the temperature of the battery charging and discharging circuit.

[0048] Specifically, the temperature detection module 13 is electrically connected to the AFE module 11. The temperature detection module 13 is used to detect the temperature of the battery charging and discharging circuit. The AFE module can obtain the temperature of the battery charging and discharging circuit detected by the temperature detection module 13 and feed it back to the control chip 21. The temperature detection module 13 can be an NTC (Negative Temperature Coefficient) thermistor or a PTC (Positive Temperature Coefficient) thermistor. It is placed on the surface of the battery cell in the battery, around the control switch 12, and in the gap of the battery pack body. It is electrically connected to the AFE module. The temperature detection module 13 is used to detect the battery temperature, the temperature of the control switch 12, and the ambient temperature to determine whether the battery meets the temperature conditions for charging and discharging. Once the detected temperature exceeds the safe range, the AFE module 11 will drive the control switch 12 to disconnect.

[0049] Optionally, refer to Figures 3 to 5 The main control board 1 is also provided with a current detection module 14, which is electrically connected to the AFE module 11, and is used to detect the current size of the battery charging and discharging circuit.

[0050] Specifically, the current detection module 14 is electrically connected to the AFE module 11. The current detection module 14 is used to detect the temperature of the battery charging and discharging circuit. The AFE module 11 can obtain the temperature of the battery charging and discharging circuit detected by the current detection module 14 and feed it back to the control chip 21. The current detection module 14 generally uses a resistor with a relatively small resistance, such as 0.001Ω~1Ω, or selects a Hall device. The current detection module 14 is generally placed between the negative pole loop P- and B- of the battery charging and discharging circuit on the main control board 1, and is electrically connected to the AFE. When there is an overcurrent, a certain voltage is formed and transmitted to the AFE module 11. The charging and discharging current is detected according to Ohm's law or the Hall effect, and it is determined whether the battery charging and discharging current is too large or short-circuited. If the current exceeds a certain range or is lower than a certain range, it will trigger overcurrent or short-circuit protection, so that the AFE module 11 disconnects the control switch 12; in addition, the current detection module 14 can calculate the battery charge state through current integration to reflect the remaining capacity of the battery.

[0051] Optionally, refer to Figures 3 to 5The main control board 1 is also provided with a communication module 4, the communication module 4 is electrically connected to the control chip 21, and the communication module 4 is used to establish communication with an external device.

[0052] Specifically, the communication module 4 is electrically connected to the control chip 21 on the main control board 1. The communication module 4 is used to establish communication with external devices, such as electric vehicles, charging cabinets, etc. The communication module 4 can establish communication with external devices through any one of the CAN (Controller Area Network) bus, RS-485 bus, and UART bus, which is specifically set according to the interface type of the communication module 4. It should be noted that the communication module 4 also needs to be electrically connected to the power module 3 on the main control board 1, and the power module 3 needs to be powered when in use, that is, the power module 3 can simultaneously power the main control board 1, the Internet of Things module 2 and the communication module 4, so as to realize the normal operation of each module on the main control board 1.

[0053] Optionally, the Internet of Things module 2 is connected to the main control board 1 through surface mounting technology or through-hole mounting technology.

[0054] Specifically, surface mount technology (SMT) is a circuit assembly technology that mounts pinless or short-lead surface assembly components on the surface of a printed circuit board or other substrate, and assembles them by soldering through methods such as reflow soldering or dip soldering. This technology has fast assembly time, small space occupation, high flexibility and high precision. The Internet of Things module 2 is mounted on the main control board 1 using surface mount technology, which can reduce the board space occupied by the Internet of Things module 2 on the main control board 1, thereby helping to improve the effective utilization rate of the main control board 1. At the same time, the mounting process is fast and time-consuming, which helps to improve the production efficiency of the battery management system. Through-hole technology (THT) is to use the pins of components to insert components into existing holes on a printed circuit board and perform soft soldering on electronic components. The Internet of Things module 2 is inserted into the main control board 1 using through-hole insertion technology, which can establish a more solid connection between the Internet of Things module 2 and the main control board 1. At the same time, the inserted leads can directly absorb thermal stress and mechanical stress, thereby effectively protecting the Internet of Things module 2.

[0055] The utility model also provides an electrical device, comprising the battery management system of any one of the aforementioned embodiments.

[0056] Specifically, the power-consuming device of the utility model includes but is not limited to electric vehicles, energy storage cabinets, charging stations, etc. The electric vehicle can be a pure electric vehicle or a hybrid vehicle, a sedan, an SUV, a bus, etc., or an electric bicycle. The energy storage cabinet system includes a battery cluster, a battery management system, a converter system, and an auxiliary system. The energy storage cabinet system can be connected to the power grid as an independent system, which can improve energy utilization efficiency, improve power supply reliability, and achieve optimal design of the energy storage system. The charging station includes multiple power battery packs, charging guns, transformers, etc. Electric vehicles can be charged at the charging station, or the power battery pack can be replaced, etc., to extend the vehicle's endurance. The power-consuming device is applied with the battery management system of the aforementioned embodiment, which helps to reduce the manufacturing cost of the power-consuming device.

[0057] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery management system, characterized in that: It includes a main control board, on which a control chip and a communication module are arranged; The control chip is electrically connected to the communication module, the control chip is used to send the battery operation status information collected by the main control board to the communication module, and the communication module is used to send the battery operation status information to other devices; The control chip and the communication module are integrated into one to form an Internet of Things module.

2. The battery management system according to claim 1, characterized in that: The communication module includes a mobile communication module and a wireless communication module, and the mobile communication module is electrically connected to the wireless communication module.

3. The battery management system according to claim 1, characterized in that: The Internet of Things module also includes a positioning module; the positioning module is electrically connected to the communication module, the positioning module is used to obtain the location of the battery, and the communication module is also used to send the location of the battery to other devices.

4. The battery management system according to claim 1, characterized in that: The main control board is also provided with a power module, and the power module is used to supply power to the main control board and the Internet of Things module.

5. The battery management system according to claim 1, characterized in that: The main control board is also provided with an AFE module, the AFE module is electrically connected to the control chip, and the AFE module is used to collect the battery operation status information and feed back the battery operation status information to the control chip.

6. The battery management system according to claim 5, characterized in that: The main control board is also provided with a control switch, the control switch is electrically connected to the AFE module, and the control switch is used to control the on and off of the battery charging and discharging circuit.

7. The battery management system according to claim 5, characterized in that: The main control board is also provided with a temperature detection module, the temperature detection module is electrically connected to the AFE module, and the temperature detection module is used to detect the temperature of the battery charging and discharging circuit.

8. The battery management system according to claim 5, characterized in that: The main control board is also provided with a current detection module, which is electrically connected to the AFE module and is used to detect the current size of the battery charging and discharging circuit.

9. The battery management system according to claim 1, characterized in that: The main control board is also provided with a communication module, the communication module is electrically connected to the control chip, and the communication module is used to establish communication with an external device.

10. The battery management system according to claim 1, characterized in that: The Internet of Things module is connected to the main control board through surface mounting technology or through-hole insertion technology.

11. An electrical device, characterized in that: A battery management system comprising the battery management system according to any one of claims 1 to 10.

Images