BMS battery management system

Abstract

The utility model provides a BMS battery management system, and relates to the BMS field, a current and voltage acquisition unit is used for acquiring the current and voltage of a battery unit, and a temperature acquisition unit is used for acquiring the temperature of the battery unit. The microprocessor is used for receiving signal data acquired by the current and voltage acquisition unit and the temperature acquisition unit and sending the received data to the MCU, and the MCU is used for analyzing and processing the received data and sending analyzed and calculated information to the display for displaying. According to the utility model, the temperature, current and voltage of the battery unit are monitored, and the charging and discharging states of the battery unit are monitored, so that the protection alarm of overvoltage, undervoltage, short circuit, overcurrent, over-high temperature and over-low temperature can be realized; the state of the battery unit is checked in real time through the display, so that the use is convenient.

Description

Technical Field

[0001] The present application relates to the field of BMS, and in particular, to a BMS battery management system. Background Art

[0002] BMS batteries are generally used for emergency purposes and to supply power to electrical equipment during power outages. BMS battery systems are commonly known as battery nannies or battery butlers. Their main function is to intelligently manage and maintain each battery cell, prevent overcharging and over-discharging of the battery, extend the battery life, and monitor the battery status. However, the current battery management circuit is complex, the manufacturing cost is high, and the stability is poor. Therefore, the current BMS battery management system needs to be improved. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a BMS battery management system that can solve the technical problems of complex BMS battery management circuits and poor stability.

[0004] An embodiment of the present application provides a BMS battery management system, including a battery cell, a current and voltage acquisition unit, a temperature acquisition unit, a charge and discharge management unit, a microprocessor, an MCU, and a display. The current and voltage acquisition unit is used to collect the current and voltage of the battery cell, and the temperature acquisition unit is used to collect the temperature of the battery cell. The microprocessor is used to receive signal data collected by the current and voltage acquisition unit and the temperature acquisition unit and send the received data to the MCU. The MCU is used to analyze and process the received data and send the analyzed and calculated information to the display for display. The MCU controls the charging and discharging of the battery cell through the charge and discharge management unit.

[0005] Preferably, the microprocessor includes a BQ76930 chip, and the current and voltage acquisition unit, the temperature acquisition unit, and the charge and discharge management unit all send the acquired signal data to the BQ76930 chip.

[0006] Preferably, the MCU model is STM32F103C8T6.

[0007] Preferably, the charge and discharge management unit includes a MOS tube Q1, a MOS tube Q3, a resistor R10, a resistor R11, a resistor R13, a resistor R14, a MOS tube Q2, a MOS tube Q4, a resistor R12, a resistor R16, a resistor R18, a resistor R19, a resistor R21, a capacitor C25, a capacitor C27, and a capacitor C28. The G pole of the MOS tube Q1 is connected to the D pole of the MOS tube Q3 through the resistor R11, the G pole of the MOS tube Q3 is connected to the MCU through the resistor R13, the S pole of the MOS tube Q3 is grounded, one end of the resistor R14 is connected to the S pole of the MOS tube Q3, the other end of the resistor R14 is connected to the G pole of the MOS tube Q3, and the S pole of the MOS tube Q1 is connected to the G pole of the MOS tube Q3 through the resistor R10. The D pole of the MOS tube Q3 is connected to the battery unit, the G pole of the MOS tube Q2 is connected to the microprocessor through the resistor R12, the D pole of the MOS tube Q2 is connected to the D pole of the MOS tube Q4, the G pole of the MOS tube Q4 is connected to the microprocessor through the resistor R16, the S pole of the MOS tube Q4 is grounded through the resistor R19, one end of the capacitor C27 is connected to the S pole of the MOS tube Q4, and the other end of the capacitor C27 is grounded, one end of the resistor R18 is connected to the S pole of the MOS tube Q4, the other end of the resistor R18 is connected to one end of the capacitor C25, the other end of the capacitor C25 is connected to one end of the capacitor C28, the other end of the capacitor C25 is connected to one end of the resistor R21, and the other end of the resistor R21 is grounded.

[0008] Preferably, the BMS battery management system further includes an indicator light component, and the indicator light component is electrically connected to the MCU.

[0009] Preferably, the battery unit comprises a voltage stabilizing component, a voltage step-down component and multiple lithium battery cells, and the voltage stabilizing component and the voltage step-down component are respectively used to step down and stabilize the voltage of the multiple lithium battery cells and then provide power.

[0010] Beneficial effects of the utility model:

[0011] The utility model provides a BMS battery management system, including a battery cell, a current and voltage acquisition unit, a temperature acquisition unit, a charge and discharge management unit, a microprocessor, an MCU, and a display. The current and voltage acquisition unit is used to acquire the current and voltage of the battery cell, the temperature acquisition unit is used to acquire the temperature of the battery cell, the microprocessor is used to receive the signal data acquired by the current and voltage acquisition unit and the temperature acquisition unit and send the received data to the MCU, the MCU is used to analyze and process the received data, and send the analyzed and calculated information to the display for display, the MCU controls the charge and discharge of the battery cell through the charge and discharge management unit, the utility model monitors the temperature, current, and voltage of the battery cell, and monitors the charge and discharge state of the battery cell, and can realize overvoltage, undervoltage, short circuit, overcurrent, overtemperature, and undertemperature protection alarms, and the utility model can view the state of the battery cell in real time through the display, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is the MCU circuit diagram of the utility model;

[0014] Figure 2 It is a circuit diagram of a microprocessor of the utility model;

[0015] Figure 3 This is a circuit diagram of a charge and discharge management unit of the utility model;

[0016] Figure 4 This is a circuit diagram of a battery unit of the present utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] like Figure 1-4As shown, a BMS battery management system includes a battery cell, a current and voltage acquisition unit, a temperature acquisition unit, a charge and discharge management unit, a microprocessor, an MCU, and a display. The current and voltage acquisition unit is used to collect the current and voltage of the battery cell, and the temperature acquisition unit is used to collect the temperature of the battery cell. The microprocessor is used to receive the signal data collected by the current and voltage acquisition unit and the temperature acquisition unit and send the received data to the MCU. The MCU is used to analyze and process the received data, and send the analyzed and calculated information to the display for display. The MCU controls the charging and discharging of the battery cell through the charge and discharge management unit. The utility model monitors the temperature, current, and voltage of the battery cell, and monitors the charge and discharge status of the battery cell, and can realize overvoltage, undervoltage, short circuit, overcurrent, high temperature, and low temperature protection alarms. The utility model can view the status of the battery cell in real time through the display, which is easy to use.

[0024] like Figure 2 As shown, in this embodiment, the microprocessor includes a BQ76930 chip, and the current and voltage acquisition unit, the temperature acquisition unit, and the charge and discharge management unit all send the collected signal data to the BQ76930 chip. A single BQ76930 chip of the utility model supports 6 to 10 strings of lithium battery cells and up to 2-way temperature detection, and can realize voltage, current, and temperature detection, and can realize overvoltage, undervoltage, short circuit, overcurrent, low temperature, and high temperature protection alarms.

[0025] like Figure 1 As shown, in this embodiment, the MCU model is STM32F103C8T6, the MCU bus width of the utility model is: 32-bit; speed: 72MHz; peripheral device: DMA.

[0026] like Figure 3As shown, in this embodiment, the charge and discharge management unit includes a MOS tube Q1, a MOS tube Q3, a resistor R10, a resistor R11, a resistor R13, a resistor R14, a MOS tube Q2, a MOS tube Q4, a resistor R12, a resistor R16, a resistor R18, a resistor R19, a resistor R21, a capacitor C25, a capacitor C27, and a capacitor C28. The G pole of the MOS tube Q1 is connected to the D pole of the MOS tube Q3 through the resistor R11, the G pole of the MOS tube Q3 is connected to the MCU through the resistor R13, the S pole of the MOS tube Q3 is grounded, one end of the resistor R14 is connected to the S pole of the MOS tube Q3, the other end of the resistor R14 is connected to the G pole of the MOS tube Q3, and the S pole of the MOS tube Q1 is connected to the G pole of the MOS tube Q3 through the resistor R10. The D pole of the MOS tube Q3 is connected to the battery unit, the G pole of the MOS tube Q2 is connected to the microprocessor through the resistor R12, the D pole of the MOS tube Q2 is connected to the D pole of the MOS tube Q4, the G pole of the MOS tube Q4 is connected to the microprocessor through the resistor R16, the S pole of the MOS tube Q4 is grounded through the resistor R19, one end of the capacitor C27 is connected to the S pole of the MOS tube Q4, and the other end of the capacitor C27 is grounded, one end of the resistor R18 is connected to the S pole of the MOS tube Q4, the other end of the resistor R18 is connected to one end of the capacitor C25, the other end of the capacitor C25 is connected to one end of the capacitor C28, the other end of the capacitor C25 is connected to one end of the resistor R21, and the other end of the resistor R21 is grounded.

[0027] Specifically, the utility model controls the charging and discharging of the battery unit by controlling the MOS tube Q1, the MOS tube Q3, the MOS tube Q2, and the MOS tube Q4, so that the battery unit is charged, charging is turned off, discharging is turned off, or discharging is turned off.

[0028] like Figure 1 As shown, in this embodiment, the BMS battery management system further includes an indicator light component, and the indicator light component is electrically connected to the MCU.

[0029] like Figure 4 As shown, in this embodiment, the battery unit includes a voltage stabilizing component, a voltage step-down component and multiple lithium battery cells. The voltage stabilizing component and the voltage step-down component are respectively used to step down and stabilize the voltage of the multiple lithium battery cells and then provide power. The utility model MP9486A, based on the system power supply part of the BQ76930+STM32 design, selects the DC-DC chip of MP9486A, and the wide power supply range of 6 to -100V can meet most application scenarios.

[0030] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A BMS battery management system, characterized in that: The system comprises a battery unit, a current and voltage acquisition unit, a temperature acquisition unit, a charge and discharge management unit, a microprocessor, an MCU, and a display. The current and voltage acquisition unit is used to acquire the current and voltage of the battery unit. The temperature acquisition unit is used to acquire the temperature of the battery unit. The microprocessor is used to receive the signal data acquired by the current and voltage acquisition unit and the temperature acquisition unit and send the received data to the MCU. The MCU is used to analyze and process the received data and send the analyzed and calculated information to the display for display. The MCU controls the charge and discharge management unit to charge and discharge the battery unit. Discharge; the microprocessor includes a BQ76930 chip, the current and voltage acquisition unit, the temperature acquisition unit, and the charge and discharge management unit all send the collected signal data to the BQ76930 chip; the MCU model is STM32F103C8T6; the charge and discharge management unit includes a MOS tube Q1, a MOS tube Q3, a resistor R10, a resistor R11, a resistor R13, a resistor R14, a MOS tube Q2, a MOS tube Q4, a resistor R12, a resistor R16, a resistor R18, a resistor R19, a resistor R21, a capacitor C25, a capacitor C27, and a capacitor C28, and the MOS tube Q1 The G pole is connected to the D pole of the MOS tube Q3 through the resistor R11, the G pole of the MOS tube Q3 is connected to the MCU through the resistor R13, the S pole of the MOS tube Q3 is grounded, one end of the resistor R14 is connected to the S pole of the MOS tube Q3, the other end of the resistor R14 is connected to the G pole of the MOS tube Q3, the S pole of the MOS tube Q1 is connected to the G pole of the MOS tube Q3 through the resistor R10, the D pole of the MOS tube Q3 is connected to the battery unit, the G pole of the MOS tube Q2 is connected to the microprocessor through the resistor R12, and the D pole of the MOS tube Q2 is connected to the battery unit. The electrode of the MOS tube Q4 is connected to the D electrode of the MOS tube Q4, the G electrode of the MOS tube Q4 is connected to the microprocessor through the resistor R16, the S electrode of the MOS tube Q4 is grounded through the resistor R19, one end of the capacitor C27 is connected to the S electrode of the MOS tube Q4, and the other end of the capacitor C27 is grounded, one end of the resistor R18 is connected to the S electrode of the MOS tube Q4, the other end of the resistor R18 is connected to one end of the capacitor C25, the other end of the capacitor C25 is connected to one end of the capacitor C28, the other end of the capacitor C25 is connected to one end of the resistor R21, and the other end of the resistor R21 is grounded.

2. A BMS battery management system according to claim 1, characterized in that: The BMS battery management system also includes an indicator light component, which is electrically connected to the MCU.

3. A BMS battery management system according to claim 1, characterized in that: The battery unit comprises a voltage stabilizing component, a voltage step-down component and a plurality of lithium battery cells. The voltage stabilizing component and the voltage step-down component are respectively used for stepping down and stabilizing the voltage of the plurality of lithium battery cells and then supplying power.

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