Bluetooth multifunctional battery management circuit and battery management system

Abstract

The utility model provides a Bluetooth multifunctional battery management circuit and a battery management system. The Bluetooth multifunctional battery management circuit comprises a main control module, a power supply module, a memory module, a Bluetooth communication module and a wired communication module. The power supply module provides electric energy for the Bluetooth and the wired communication module, the memory module can store real-time and historical information of a battery, and two-way transmission of data is realized through the Bluetooth communication module and the main control module, so that after-sales personnel can read battery information and update firmware without carrying complex tools, and the service life of the after-sales personnel is prolonged. And the after-sales analysis and maintenance efficiency is obviously improved. The Bluetooth multifunctional battery management circuit supports various wired communication interfaces, including RS485, CAN and UART, so as to meet the communication requirements of different types of batteries. The user can also obtain real-time and historical information of the battery by using the Bluetooth communication module through a smart phone APP, so that the Bluetooth multifunctional battery management circuit can analyze and process battery problems in time.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery management, and particularly relates to a Bluetooth multifunctional battery management circuit and a battery management system. BACKGROUND

[0002] With the rapid development of new energy technology, batteries as a key energy storage device have been widely used in electric vehicles and energy storage systems. The continuous progress of battery technology has driven the rapid expansion of the new energy market, but at the same time, it has also brought challenges to battery after-sales maintenance and management. In practical applications, battery failures or damages are difficult to completely avoid, especially in complex operating environments, battery performance degradation and failure analysis have become the focus of battery after-sales service.

[0003] Traditional battery after-sales maintenance points usually need to be equipped with complex tools such as laptops, and require after-sales personnel to have corresponding technical knowledge and operating experience. However, relying on specific tools and personnel operations not only increases the after-sales cost, but also reduces the work efficiency. In dealing with complex failures, on-site personnel often need the assistance of laboratory R&D personnel to analyze and repair by transmitting real-time state information and historical records of the battery. Making the after-sales process involve cumbersome data collection and transmission steps, it is difficult to meet the needs of rapid response and efficient repair. UTILITY MODEL CONTENT

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art, and to provide a Bluetooth multifunctional battery management circuit and a battery management system based on Bluetooth communication.

[0005] The purpose of the present disclosure is achieved by the following technical solutions:

[0006] A Bluetooth multifunctional battery management circuit, characterized in that it comprises a master control module, a Bluetooth communication module, a wired communication module, a memory module, and a power supply module.

[0007] The power supply module is used to provide power for the master control module, the Bluetooth communication module, and the wired communication module.

[0008] The memory module is used to store real-time state information and historical record information of the battery.

[0009] The serial data sending end of the Bluetooth communication module is connected with the Bluetooth data receiving end of the master control module, and the serial data receiving end of the Bluetooth communication module is connected with the Bluetooth data sending end of the master control module.

[0010] The wired communication module includes a UART communication circuit, an RS485 communication circuit and a CAN communication circuit, a UART data sending end of the UART communication circuit is connected with a UART signal receiving end of the battery management system to be tested, a UART data receiving end of the UART communication circuit is connected with a UART signal sending end of the battery management system to be tested, an RS485 first differential signal transmission end of the RS485 communication circuit is connected with an RS485 first differential signal communication end of the battery management system to be tested, an RS485 second differential signal transmission end of the RS485 communication circuit is connected with an RS485 second differential signal communication end of the battery management system to be tested, a CAN first bidirectional data transmission end of the CAN communication circuit is connected with a CAN first bidirectional data communication end of the battery management system to be tested, and a CAN second bidirectional data transmission end of the CAN communication circuit is connected with a CAN second bidirectional data communication end of the battery management system to be tested.

[0011] The UART transmission connection end of the UART communication circuit is connected with a UART communication output end of the master control module, the RS485 transmission connection end of the RS485 communication circuit is connected with an RS485 communication output end of the master control module, and the CAN transmission connection end of the CAN communication circuit is connected with a CAN communication output end of the master control module.

[0012] In one of the embodiments, the master control module includes a master control chip, a first current limiting resistor and a first filter capacitor, a first end of the first current limiting resistor is used for being connected with a power supply end of an external power supply, a second end of the first current limiting resistor is connected with a power supply input end of the master control chip, a first end of the first filter capacitor is connected with the power supply input end of the master control chip, and a second end of the first filter capacitor is grounded.

[0013] In one of the embodiments, the Bluetooth communication module includes a Bluetooth communication chip, a first electronic switch tube and a first voltage dividing resistor, a first end of the first voltage dividing resistor is used for being connected with a Bluetooth reset signal end of the master control module, a second end of the first voltage dividing resistor is connected with a control end of the first electronic switch tube, a first end of the first electronic switch tube is connected with a reset control end of the Bluetooth communication chip, and a second end of the first electronic switch tube is grounded.

[0014] In one of the embodiments, the Bluetooth communication module further includes a first bias resistor, a first end of the first bias resistor is connected with the control end of the first electronic switch tube, and a second end of the first bias resistor is grounded.

[0015] In one of the embodiments, the RS485 communication circuit comprises an optocoupler switch, a second voltage dividing resistor and an RS485 control chip, an input end of the optocoupler switch is used to be connected with a power supply end of an external power supply, a first end of the second voltage dividing resistor is used to be connected with an output end of the optocoupler switch U5, and a second end of the second voltage dividing resistor is connected with a driver signal end of the RS485 control chip.

[0016] In one of the embodiments, the UART communication circuit comprises a second electronic switch tube, a third voltage dividing resistor and a second current limiting resistor, a first end of the third voltage dividing resistor is used to be connected with a power supply end of an external power supply, a second end of the third voltage dividing resistor is connected with a control end of the second electronic switch tube, a first end of the second electronic switch tube is used to be connected with a UART communication output end of the battery management system to be tested, and a second end of the second electronic switch tube is connected with a UART data sending end of the UART communication circuit through the second current limiting resistor.

[0017] In one of the embodiments, the UART communication circuit further comprises a voltage stabilizing diode, a first end of the voltage stabilizing diode is connected with the first end of the second electronic switch tube, and an anode of the voltage stabilizing diode is grounded.

[0018] In one of the embodiments, the CAN communication circuit comprises a CAN communication control chip and a second filter capacitor, a first end of the second filter capacitor is connected with a power supply end of the CAN communication control chip, and a second end of the second filter capacitor is grounded.

[0019] In one of the embodiments, the memory module comprises a memory chip, a fourth voltage dividing resistor and a third filter capacitor, a first end of the fourth voltage dividing resistor is used to be connected with a power supply end of an external power supply, a second end of the fourth voltage dividing resistor is connected with a communication control end of the memory chip, a first end of the third filter capacitor is connected with a power supply end of the memory chip, and a second end of the third filter capacitor is grounded.

[0020] A battery management system comprises the Bluetooth multifunctional battery management circuit according to any one of the above.

[0021] Compared with the prior art, the present disclosure has at least the following advantages:

[0022] 1. The Bluetooth multifunctional battery management circuit described above, without carrying a notebook computer and other complex tools, the after-sales personnel can realize the function of reading battery information and updating battery firmware, thereby improving the efficiency of after-sales analysis and maintenance. In addition, the Bluetooth multifunctional battery management circuit supports RS485, CAN, UART multiple wired communication interfaces to adapt to the communication needs of different types of batteries, and through the Bluetooth communication module, the smart phone APP can obtain the real-time state information and historical record information of the battery, which is conducive to timely analysis and processing of battery problems. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 The working principle diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0025] Figure 2 The system principle block diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0026] Figure 3 The main control module circuit diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0027] Figure 4 The Bluetooth communication module circuit diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0028] Figure 5 The UART communication circuit diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0029] Figure 6 The RS485 communication circuit diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0030] Figure 7 The CAN communication circuit diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0031] Figure 8 The memory module circuit diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0032] Figure 9 The LED indicator module circuit diagram of the Bluetooth multifunctional battery management circuit of an embodiment;

[0033] Figure 10This is a circuit diagram of the power supply module of a Bluetooth multi-functional battery management circuit according to one embodiment. Detailed Implementation

[0034] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0038] like Figures 1 to 10 As shown, a Bluetooth multi-functional battery management circuit 10 according to an embodiment of the present disclosure includes a main control module 100, a Bluetooth communication module 200, a wired communication module 300, a memory module 400, and a power supply module.

[0039] The power supply module is used to provide power to the main control module 100, the Bluetooth communication module 200 and the wired communication module 300.

[0040] The memory module 400 is used to store the battery's real-time status information and historical information.

[0041] The serial data transmitter PA17 of the Bluetooth communication module 200 is connected to the Bluetooth data receiver MCU_RXD of the main control module 100, and the serial data receiver PA18 of the Bluetooth communication module 200 is connected to the Bluetooth data transmitter MCU_TXD of the main control module 100.

[0042] The wired communication module 300 comprises a UART communication circuit 310, an RS485 communication circuit 320 and a CAN communication circuit 330. The UART data transmission end TXD_MSP_GPS of the UART communication circuit 310 is connected with the UART signal receiving end TXD of the battery management system to be tested, the UART data receiving end RXD_MSP_GPS of the UART communication circuit is connected with the UART signal transmission end RXD of the battery management system to be tested, the RS485 first differential signal transmission end 485_0 of the RS485 communication circuit is connected with the RS485 first differential signal communication end 485_A of the battery management system to be tested, the RS485 second differential signal transmission end 485_1 of the RS485 communication circuit is connected with the RS485 second differential signal communication end 485_B of the battery management system to be tested, the CAN first bidirectional data transmission end CAN_HH of the CAN communication circuit is connected with the CAN first bidirectional data communication end CAN_H of the battery management system to be tested, and the CAN second bidirectional data transmission end CAN_LL of the CAN communication circuit is connected with the CAN second bidirectional data communication end CAN_L of the battery management system to be tested.

[0043] The UART transmission connection end of the UART communication circuit 310 is connected with the UART communication output end of the master control module, the RS485 transmission connection end of the RS485 communication circuit 320 is connected with the RS485 communication output end of the master control module, and the CAN transmission connection end of the CAN communication circuit 330 is connected with the CAN communication output end of the master control module.

[0044] In the embodiment, when the Bluetooth multifunctional battery management circuit 10 needs to manage the battery to be tested, the Bluetooth communication module 200 is in communication connection with the master control module 100, and meanwhile, the Bluetooth communication module 200 can be connected with the APP software of the smart phone through the chip inside the Bluetooth communication module 200, and the battery to be tested can be in communication connection with the master control module 100 through any one of the UART communication circuit 310, the RS485 communication circuit 320 or the CAN communication circuit 330 in the Bluetooth multifunctional battery management circuit 10, so that the after-sales personnel can send a query request signal to the battery to be tested through the smart phone APP software and the Bluetooth communication module 200, then the battery responds to the request of the Bluetooth communication module 200 and feeds back the real-time state information to the Bluetooth communication module 200 through the wired communication interface, and the Bluetooth communication module 200 transmits the related data such as single cell voltage, current, cell temperature and remaining capacity to the smart phone APP, so that the after-sales personnel can accurately analyze the working state of the battery to be tested, and meanwhile, the Bluetooth multifunctional battery management circuit 10 can send a request to read the historical use record information of the battery.

[0045] Further, when the battery firmware needs to be updated, the Bluetooth communication module 200 loads the new firmware file from the memory module 400, and then sends the firmware file to be updated to the battery through the wired communication interface and the specified protocol, and guides the battery to update the firmware. At the same time, the smart phone APP receives the battery update information and displays it on the user interface, so that the after-sales personnel can view and analyze it.

[0046] The Bluetooth multifunctional battery management circuit 10 described above can realize the functions of reading battery information and updating battery firmware without the after-sales personnel carrying complex tools such as notebook computers, thereby improving the efficiency of after-sales analysis and maintenance. In addition, the Bluetooth multifunctional battery management circuit 10 supports RS485, CAN, UART and other wired communication interfaces to adapt to the communication needs of different types of batteries, and through the Bluetooth communication module 200, the smart phone APP can obtain real-time state information and historical record information of the battery, which is conducive to timely analysis and processing of battery problems.

[0047] As shown in Figure 3 In one embodiment, the master control module 100 includes a master control chip U1, a first current limiting resistor R47, and a first filter capacitor C27. The first end of the first current limiting resistor R47 is connected to the external power supply terminal, the second end of the first current limiting resistor R47 is connected to the power input terminal of the master control chip U1, the first end of the first filter capacitor C27 is connected to the power input terminal of the master control chip U1, and the second end of the first filter capacitor C27 is grounded. In this embodiment, the main function of the first current limiting resistor R47 is to limit the current size to prevent excessive current from flowing into the master control chip U1 when the circuit is started or the external power supply voltage is unstable, so as to avoid damage to the master control chip U1. Specifically, when the external power supply terminal is connected to the voltage, the current first flows through the first current limiting resistor R47 for voltage division and current limiting, and then flows into the power input terminal of the master control chip U1, thereby ensuring that the current flowing into the master control chip U1 is within the normal range. In addition, when the power voltage fluctuates or has noise, since the first filter capacitor C27 is connected in parallel between the power input terminal of the master control chip U1 and the ground, through the charge and discharge process of the first filter capacitor C27, the first filter capacitor C27 can absorb the unstable voltage component, so that the master control chip U1 can obtain more stable voltage, thereby ensuring that the master control module 100 works stably and reliably.

[0048] As shown in Figure 4As shown in the figure, in one embodiment, the Bluetooth communication module 200 includes a Bluetooth communication chip U3, a first electronic switch tube QK1 and a first voltage dividing resistor RK5, the first end of the first voltage dividing resistor RK5 is used to connect with the Bluetooth reset signal end Buletooth REST of the master control module 100, the second end of the first voltage dividing resistor RK5 is connected with the control end of the first electronic switch tube QK1, the first end of the first electronic switch tube QK1 is connected with the reset control end of the Bluetooth communication chip U3, and the second end of the first electronic switch tube QK1 is grounded. In this embodiment, when the Bluetooth reset signal end Buletooth REST of the master control module 100 outputs a high level signal to the control end of the first electronic switch tube QK1, the high level signal first reduces the signal strength through the first voltage dividing resistor RK5, and then the high level signal is transmitted to the control end of the first electronic switch tube QK1, so that the voltage of the control end of the first electronic switch tube QK1 is greater than its conduction threshold voltage, thereby making the first electronic switch tube QK1 in the conduction state, so that the reset control end of the Bluetooth communication chip U3 forms a loop through the second end of the first electronic switch tube QK1 and the ground, and then the reset control end of the Bluetooth communication chip U3 is pulled to low level, so that the Bluetooth communication chip U3 completes the restart reset operation.

[0049] As shown in the figure, Figure 4 In one embodiment, the Bluetooth communication module 200 further includes a first bias resistor RK6, the first end of the first bias resistor RK6 is connected with the control end of the first electronic switch tube QK1, and the second end of the first bias resistor RK6 is grounded. In this embodiment, when the Bluetooth reset signal end Buletooth REST of the master control module 100 does not output a high level signal, the control end of the first electronic switch tube QK1 is connected with the ground through the first bias resistor RK6, and due to the existence of the bias resistor, the control end of the first electronic switch tube QK1 is pulled to low level, so that the voltage of the control end is lower than the conduction threshold voltage, thereby making the first electronic switch tube QK1 remain in the cut-off state, and then even in the absence of reset signal, the reset control end of the Bluetooth communication chip U3 will not be accidentally pulled down due to the unstable state of the electronic switch tube, so as to ensure the stability and reliability of the Bluetooth communication module 200.

[0050] As shown in the figure, Figure 6As shown, in one embodiment, the RS485 communication circuit 320 includes an optocoupler switch U5, a second voltage dividing resistor R52, and an RS485 control chip UA1. The input end of the optocoupler switch U5 is connected to the external power supply end, the first end of the second voltage dividing resistor R52 is connected to the output end of the optocoupler switch U5, and the second end of the second voltage dividing resistor R52 is connected to the driver signal end of the RS485 control chip UA1. In this embodiment, when the input end of the optocoupler switch U5 is connected to the external power supply end, and the master control module 100 outputs a level signal to the input end of the optocoupler switch U5 through the enable end, the high-level signal is loaded to the diode in the optocoupler switch U5 through the second voltage dividing resistor R52, so that the diode is turned on and emits light, thereby making the output end of the optocoupler switch U5 be turned on, and the output end of the optocoupler switch U5 outputs a high-level signal and transmits it to the driver signal end DE of the RS485 control chip UA1 through the second voltage dividing resistor R52, so that the RS485 control chip UA1 can work normally.

[0051] As shown in FIG. 6, in one embodiment, the UART communication circuit 310 includes a second electronic switch tube Q1, a third voltage dividing resistor RS1, and a second current limiting resistor R1. The first end of the third voltage dividing resistor RS1 is connected to the external power supply end, the second end of the third voltage dividing resistor RS1 is connected to the control end of the second electronic switch tube Q1, the first end of the second electronic switch tube Q1 is connected to the UART signal receiving end TXD of the battery management system to be tested, and the second end of the second electronic switch tube Q1 is connected to the UART data sending end TXD_MSP_GPS of the UART communication circuit 310 through the second current limiting resistor R1. Figure 5 As shown in FIG. 6, in one embodiment, the UART communication circuit 310 includes a second electronic switch tube Q1, a third voltage dividing resistor RS1, and a second current limiting resistor R1. The first end of the third voltage dividing resistor RS1 is connected to the external power supply end, the second end of the third voltage dividing resistor RS1 is connected to the control end of the second electronic switch tube Q1, the first end of the second electronic switch tube Q1 is connected to the UART signal receiving end TXD of the battery management system to be tested, and the second end of the second electronic switch tube Q1 is connected to the UART data sending end TXD_MSP_GPS of the UART communication circuit 310 through the second current limiting resistor R1.

[0052] Figure 5 ​As shown, in one embodiment, the UART communication circuit 310 further comprises a zener diode D2, the cathode of the zener diode D2 is connected to the first end of the second electronic switch tube Q1, and the anode of the zener diode D2 is grounded. In this embodiment, when the battery under test communicates with the master control module 100 through the UART communication circuit 310, due to the unstable factors such as transient overvoltage, electromagnetic interference, etc. that may exist in the battery voltage or communication signal, it is possible to cause the voltage in the UART communication circuit 310 to exceed the preset safety range. The cathode of the zener diode D2 is connected to the first end of the second electronic switch tube Q1, so that the overvoltage transmitted from the battery under test will first pass through the zener diode D2. When the voltage exceeds the breakdown voltage of the zener diode D2, the zener diode D2 will quickly enter the breakdown state and become a low-resistance conductor, so that the zener diode D2 is short-circuited to the ground end, thereby effectively limiting the overvoltage within a safe level to prevent damage to the second electronic switch tube Q1 by the overvoltage, and further ensuring the stability and reliability of the UART communication circuit 310.

[0053] As shown in FIG. 3, the CAN communication circuit 330 comprises a CAN communication control chip U2 and a second filter capacitor C19. The first end of the second filter capacitor C19 is connected to the power supply end of the CAN communication control chip U2, and the second end of the second filter capacitor C19 is grounded. Figure 7 As shown, in one embodiment, the CAN communication circuit 330 comprises a CAN communication control chip U2 and a second filter capacitor C19. The first end of the second filter capacitor C19 is connected to the power supply end of the CAN communication control chip U2, and the second end of the second filter capacitor C19 is grounded. In this embodiment, when transmitting voltage to the power supply end of the CAN communication control chip U2 from the external power supply end, it can effectively filter out high-frequency noise and interference signals in the voltage. At the same time, if the load changes and the power output voltage fluctuates, due to the energy storage characteristics of the second filter capacitor C19, the second filter capacitor C19 can absorb voltage fluctuations. Specifically, when the voltage rises, the filter capacitor absorbs excess energy; when the voltage decreases, the filter capacitor releases energy, thereby keeping the voltage input to the CAN communication control chip U2 stable.

[0054] As shown in FIG. 3, the CAN communication circuit 330 comprises a CAN communication control chip U2 and a second filter capacitor C19. The first end of the second filter capacitor C19 is connected to the power supply end of the CAN communication control chip U2, and the second end of the second filter capacitor C19 is grounded. Figure 8As shown, in one embodiment, the memory module 400 includes a memory chip UE1, a fourth voltage divider resistor RE3, and a third filter capacitor CE1. The first end of the fourth voltage divider resistor RE3 is connected to an external power supply terminal, and the second end of the fourth voltage divider resistor RE3 is connected to the communication control terminal of the memory chip UE1. The first end of the third filter capacitor CE1 is connected to the power supply terminal of the memory chip UE1, and the second end of the third filter capacitor CE1 is grounded. In this embodiment, the first end of the fourth voltage divider resistor RE3 is connected to the external power supply terminal, allowing the fourth voltage divider resistor RE3 to function as a voltage divider, ensuring that the voltage transmitted to the communication control terminal of the memory chip UE1 is within a safe operating range, thus protecting the memory chip UE1 from overvoltage damage. The third filter capacitor CE1 is connected in parallel between the power supply terminal and the ground terminal of the memory chip UE1, enabling it to filter out high-frequency noise and interference in the power supply, thereby ensuring that the memory chip UE1 can obtain a stable power supply voltage, and thus guaranteeing the accuracy and reliability of data storage and retrieval by the memory module 400.

[0055] like Figure 9 As shown, in one embodiment, the Bluetooth multi-functional battery management circuit 10 further includes an LED indicator module 500. The LED indicator module 500 includes multiple LEDs, with the positive terminal of each LED connected to the indicator control terminal of the main control module 100, and the negative terminal of each LED connected to the ground terminal. In this embodiment, when the Bluetooth multi-functional battery management circuit 10 successfully establishes a communication connection with the battery, the LED indicator will flash at a frequency of 1 second interval (on for 1 second, off for 1 second) to visually display the battery's online communication status. During the process of the Bluetooth multi-functional battery management circuit 10 updating the battery firmware through the wired communication interface, the LED indicator will flash rapidly (on for 500 milliseconds, off for 500 milliseconds) to indicate to the user that the firmware is being updated. When the communication connection between the Bluetooth multi-functional battery management circuit 10 and the battery is disconnected, the LED indicator will change its flashing frequency to a frequency of 2 seconds interval (on for 2 seconds, off for 2 seconds) to indicate that the battery communication is offline. After the battery data update is completed, the LED will remain lit for 5 seconds as feedback of a successful update. The LED indicator module 500 provides users with intuitive feedback on the communication status between the Bluetooth multi-functional battery management circuit 10, the battery, and the smartphone APP through different flashing frequencies and on / off modes. This allows users to quickly understand the system's working status, thereby improving the efficiency of battery after-sales maintenance and testing.

[0056] A battery management system comprising the Bluetooth multifunctional battery management circuit 10 of any of the above. In this embodiment, when the Bluetooth multifunctional battery management circuit 10 needs to manage the battery under test, the Bluetooth communication module 200 is in communication with the master control module 100, and the Bluetooth communication module 200 can be connected to the APP software of the smart phone through the chip inside it, and the battery under test can be connected to the master control module 100 through any of the UART communication circuit 310, RS485 communication circuit 320 or CAN communication circuit 330 in the Bluetooth multifunctional battery management circuit 10, so that the after-sales personnel can send a query request signal to the battery under test through the smart phone APP software and the Bluetooth communication module 200, and the battery responds to the request of the Bluetooth communication module 200 and feeds back real-time state information to the Bluetooth communication module 200 through the wired communication interface, and then the Bluetooth communication module 200 transmits relevant data such as single cell voltage, current, cell temperature and remaining capacity to the smart phone APP. In addition, the Bluetooth multifunctional battery management circuit 10 can send a request to read the historical use record information of the battery. Further, when it is necessary to update the battery firmware, the Bluetooth communication module 200 loads a new firmware file from the memory module 400, and then sends the firmware file to be updated to the battery through the wired communication interface and a specified protocol, and guides the battery to update the firmware, while the smart phone APP receives the battery update information and displays it on the user interface for the after-sales personnel to view and analyze.

[0057] Compared with the prior art, the present disclosure has at least the following advantages:

[0058] 1. The Bluetooth multifunctional battery management circuit 10 described above, the after-sales personnel does not need to carry a notebook computer or other complex tools to realize the functions of reading battery information and updating battery firmware, thereby improving the efficiency of after-sales analysis and maintenance. In addition, the Bluetooth multifunctional battery management circuit 10 supports RS485, CAN, UART multiple wired communication interfaces to adapt to the communication needs of different types of batteries, and through the Bluetooth communication module 200, the smart phone APP can obtain the real-time state information and historical record information of the battery, which is conducive to timely analysis and processing of battery problems.

[0059] The above-described embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are within the scope of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.

Claims

1. A Bluetooth multi-function battery management circuit, characterized by, The battery management system comprises a main control module, a Bluetooth communication module, a wired communication module, a memory module and a power supply module. The power supply module is configured to provide power for the main control module, the Bluetooth communication module and the wired communication module. The memory module is configured to store real-time state information and historical record information of the battery. The serial data sending end of the Bluetooth communication module is connected with the Bluetooth data receiving end of the main control module, and the serial data receiving end of the Bluetooth communication module is connected with the Bluetooth data sending end of the main control module. The wired communication module comprises a UART communication circuit, an RS485 communication circuit and a CAN communication circuit. The UART data sending end of the UART communication circuit is connected with the UART signal receiving end of the battery management system to be tested, and the UART data receiving end of the UART communication circuit is connected with the UART signal sending end of the battery management system to be tested.

2. The Bluetooth multi-functional battery management circuit of claim 1, wherein, The RS485 first differential signal transmission end of the RS485 communication circuit is connected with the RS485 first differential signal communication end of the battery management system to be tested, and the RS485 second differential signal transmission end of the RS485 communication circuit is connected with the RS485 second differential signal communication end of the battery management system to be tested.

3. The Bluetooth multi-functional battery management circuit of claim 1, wherein, The CAN first bidirectional data transmission end of the CAN communication circuit is connected with the CAN first bidirectional data communication end of the battery management system to be tested, and the CAN second bidirectional data transmission end of the CAN communication circuit is connected with the CAN second bidirectional data communication end of the battery management system to be tested.

4. The Bluetooth multi-functional battery management circuit of claim 3, wherein, The UART transmission connection end of the UART communication circuit is connected with the UART communication output end of the main control module, the RS485 transmission connection end of the RS485 communication circuit is connected with the RS485 communication output end of the main control module, and the CAN transmission connection end of the CAN communication circuit is connected with the CAN communication output end of the main control module. The main control module comprises a main control chip, a first current-limiting resistor and a first filter capacitor. The first end of the first current-limiting resistor is configured to be connected with the power supply end of an external power supply, the second end of the first current-limiting resistor is connected with the power input end of the main control chip, the first end of the first filter capacitor is connected with the power input end of the main control chip, and the second end of the first filter capacitor is grounded. The Bluetooth communication module comprises a Bluetooth communication chip, a first electronic switch tube and a first voltage dividing resistor. The first end of the first voltage dividing resistor is configured to be connected with the Bluetooth reset signal end of the main control module, the second end of the first voltage dividing resistor is connected with the control end of the first electronic switch tube, the first end of the first electronic switch tube is connected with the reset control end of the Bluetooth communication chip, and the second end of the first electronic switch tube is grounded. The Bluetooth communication module further comprises a first bias resistor. The first end of the first bias resistor is connected with the control end of the first electronic switch tube, and the second end of the first bias resistor is grounded.

5. The Bluetooth multi-functional battery management circuit of claim 1, wherein, The RS485 communication circuit comprises an optocoupler switch, a second voltage dividing resistor and an RS485 control chip, an input end of the optocoupler switch is used for being connected with an external power supply end, a first end of the second voltage dividing resistor is used for being connected with an output end of the optocoupler switch U5, and a second end of the second voltage dividing resistor is connected with a driver signal end of the RS485 control chip.

6. The Bluetooth multi-functional battery management circuit of claim 1, wherein, The UART communication circuit comprises a second electronic switch tube, a third voltage dividing resistor and a second current limiting resistor, a first end of the third voltage dividing resistor is used for being connected with an external power supply end, a second end of the third voltage dividing resistor is connected with a control end of the second electronic switch tube, a first end of the second electronic switch tube is used for being connected with a UART communication output end of a battery management system to be tested, and a second end of the second electronic switch tube is connected with a UART data sending end of the UART communication circuit through the second current limiting resistor.

7. The Bluetooth multi-functional battery management circuit of claim 6, wherein, The UART communication circuit further comprises a voltage stabilizing diode, a first end of the voltage stabilizing diode is connected with the first end of the second electronic switch tube, and an anode of the voltage stabilizing diode is grounded.

8. The Bluetooth multi-functional battery management circuit of claim 1, wherein, The CAN communication circuit comprises a CAN communication control chip and a second filter capacitor, a first end of the second filter capacitor is connected with a power supply end of the CAN communication control chip, and a second end of the second filter capacitor is grounded.

9. The Bluetooth multi-functional battery management circuit of claim 1, wherein, The memory module comprises a memory chip, a fourth voltage dividing resistor and a third filter capacitor, a first end of the fourth voltage dividing resistor is used for being connected with an external power supply end, a second end of the fourth voltage dividing resistor is connected with a communication control end of the memory chip, a first end of the third filter capacitor is connected with a power supply end of the memory chip, and a second end of the third filter capacitor is grounded.

10. A battery management system, characterized by, The Bluetooth multifunctional battery management circuit comprises the Bluetooth multifunctional battery management circuit according to any one of claims 1 to 9.

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