CN220711131U - 16-string lithium battery BMS battery management system - Google Patents

Abstract

The utility model relates to the technical field of power management, and particularly discloses a 16-string lithium battery BMS battery management system which comprises an MCU main control circuit, a battery connection circuit, a charge-discharge detection circuit, a temperature acquisition circuit, an external communication circuit and a drive control circuit, wherein the battery connection circuit, the charge-discharge detection circuit, the temperature acquisition circuit, the external communication circuit and the drive control circuit are electrically connected with the MCU main control circuit, and the battery connection circuit is electrically connected with the charge-discharge detection circuit, the temperature acquisition circuit and the drive control circuit respectively. The utility model collects signals of voltage, current, temperature, residual electric quantity and the like through the charge and discharge detection circuit and the temperature acquisition circuit, the MCU main control circuit outputs driving control signals to realize charge equalization, overvoltage protection, overcurrent protection, overtemperature protection and the like, and the external communication circuit realizes external transmission of signals to realize the integration of functions of acquisition, management, communication and the like, and can be widely applied to indoor and outdoor base stations.

Description

16-string lithium battery BMS battery management system

Technical Field

The utility model relates to the technical field of power management, in particular to a 16-string lithium battery BMS battery management system.

Background

BMS is the acronym english of batterymanagement system, where the meaning of the text is battery management system. The BMS, which may be generally colloquially referred to as a battery nurse or battery manager, has a main function of intelligently monitoring, managing, and maintaining the individual battery cells. Along with the wide application of the lithium iron battery in the communication industry, requirements of high performance, high reliability, high cost performance and the like are also put forward on a battery management system, for example, a communication base station generally needs to adopt the lithium iron battery. However, the existing battery management system has single function and poor anti-interference capability, and if the working parameters of the single battery and the whole battery pack cannot be timely and accurately acquired: for example, voltage, current, temperature, residual electric quantity and the like cannot be monitored and managed, and the base station optimization control strategy can be influenced, so that the safety performance of the battery is reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a 16-string lithium battery BMS battery management system, which is characterized in that a charge and discharge detection circuit and a temperature acquisition circuit are arranged to acquire signals such as voltage, current, temperature, residual electric quantity and the like, a MCU main control circuit outputs driving control signals to realize charge equalization, overvoltage protection, overcurrent protection, overtemperature protection and the like, an external communication circuit realizes external transmission of signals, and the integrated design is adopted to integrate functions such as acquisition, management, communication and the like, so that the system can be widely applied to indoor and outdoor base stations.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a 16 cluster lithium battery BMS battery management system, includes MCU main control circuit, battery connecting circuit, charge-discharge detection circuit, temperature acquisition circuit, to outer communication circuit and drive control circuit all with MCU main control circuit electric connection, battery connecting circuit respectively with charge-discharge detection circuit, temperature acquisition circuit and drive control circuit electric connection.

Preferably, the MCU master control circuit includes an MCU master control chip U1, a programming interface P1, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R26, a diode D1, a diode D2, a capacitor C12, and a capacitor C16, where the programming interface P1, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R26, the diode D1, the diode D2, the capacitor C12, and the capacitor C16 are all connected to the MCU master control chip U1.

Preferably, the battery connection circuit includes a battery interface P7, a battery interface P8, a battery interface P9, a battery interface P10, a charging MOS bank, a discharging MOS bank, a voltage stabilizing bank, and a charging/discharging output circuit, where the charging MOS bank, the discharging MOS bank, the voltage stabilizing bank, and the charging/discharging output circuit are respectively connected with the battery interface P7, the battery interface P8, and the battery interface P9, and the battery interface P7, the battery interface P8, and the battery interface P9 are respectively connected with the battery interface P10, and the battery interface P10 is connected with the MCU host control chip U1.

Preferably, the charge-discharge detection circuit comprises a voltage acquisition circuit, a current acquisition circuit, a switch wake-up detection circuit, a battery preheating circuit, a charge detection circuit, a discharge detection circuit and a load detection circuit, wherein the voltage acquisition circuit, the current acquisition circuit, the switch wake-up detection circuit, the battery preheating circuit, the charge detection circuit, the discharge detection circuit and the load detection circuit are all connected with the MCU main control chip U1.

Preferably, the temperature acquisition circuit includes a resistor R7, a resistor R8, a resistor R9, a resistor R16, a capacitor C1, a capacitor C3, a capacitor C5, a capacitor C7, a voltage regulator ZD1, a thermistor NTC1 and a thermistor NTC2, where the resistor R7, the resistor R8, the resistor R9, the resistor R16, the capacitor C1, the capacitor C3, the capacitor C5, the capacitor C7, the voltage regulator ZD1, the thermistor NTC1 and the thermistor NTC2 are all connected with the MCU master control chip U1.

Preferably, the external communication circuit comprises an RS232 communication chip U16, an RS485 communication chip U18, a CAN bus communication chip U13, a communication interface P11, a communication interface P12 and a communication interface P13, wherein the communication interface P11, the communication interface P12 and the communication interface P13 are respectively connected with the RS232 communication chip U16, the RS485 communication chip U18 and the CAN bus communication chip U13, and the RS232 communication chip U16, the RS485 communication chip U18 and the CAN bus communication chip U13 are connected with the MCU master control chip U1.

Preferably, the driving control circuit comprises a driving control chip U19, a MOS driving signal detection circuit, a driving transfer circuit, a constant current control circuit and an overcurrent protection circuit, wherein the MOS driving signal detection circuit, the driving transfer circuit, the constant current control circuit and the overcurrent protection circuit are all connected with the driving control chip U19, and the driving control chip U19 is connected with the MCU main control chip U1.

By adopting the technical scheme, the 16-string lithium battery BMS battery management system provided by the utility model has the following beneficial effects: the battery connecting circuit, the charge and discharge detecting circuit, the temperature collecting circuit, the external communication circuit and the driving control circuit in the 16-string lithium battery BMS battery management system are electrically connected with the MCU main control circuit, the battery connecting circuit is electrically connected with the charge and discharge detecting circuit, the temperature collecting circuit and the driving control circuit respectively, signals such as voltage, current, temperature and residual electric quantity are collected through the charge and discharge detecting circuit and the temperature collecting circuit, the MCU main control circuit outputs driving control signals to realize charge equalization, overvoltage protection, overcurrent protection, overtemperature protection and the like, the external communication circuit realizes external transmission of signals, the integrated design is adopted, the functions of collection, management, communication and the like are integrated, the functions are diversified, the intelligent degree is high, and the 16-string lithium battery BMS battery management system can be widely applied to indoor and outdoor base stations such as integrated base stations, marginal stations, repeater stations, macro base stations and solar base stations.

Drawings

FIG. 1 is a block diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the operation of the present utility model;

FIG. 3 is a schematic circuit diagram of the MCU master control circuit and the temperature acquisition circuit in the utility model;

FIG. 4 is a schematic circuit diagram of a battery connection circuit according to the present utility model;

FIG. 5 is a schematic circuit diagram of a charge/discharge detection circuit according to the present utility model;

FIG. 6 is a schematic circuit diagram of an external communication circuit according to the present utility model;

FIG. 7 is a schematic circuit diagram of a drive control circuit according to the present utility model;

in the figure, a 1-MCU main control circuit, a 2-battery connection circuit, a 3-charge and discharge detection circuit, a 4-temperature acquisition circuit, a 5-external communication circuit and a 6-drive control circuit.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

As shown in fig. 1, in the structural block diagram of the present utility model, the 16-string lithium battery BMS battery management system includes an MCU main control circuit 1, a battery connection circuit 2, a charge/discharge detection circuit 3, a temperature acquisition circuit 4, an external communication circuit 5 and a drive control circuit 6, wherein the battery connection circuit 2, the charge/discharge detection circuit 3, the temperature acquisition circuit 4, the external communication circuit 5 and the drive control circuit 6 are electrically connected to the MCU main control circuit 1, and the battery connection circuit 2 is electrically connected to the charge/discharge detection circuit 3, the temperature acquisition circuit 4 and the drive control circuit 6, respectively. It can be understood that the battery connection circuit 2 is used for connecting a battery terminal, the charge/discharge detection circuit 3 is used for detecting temperature, voltage, current and other information when the battery is charged or discharged, the external communication circuit 5 is used for communicating with an upper computer through an RS232 interface, so that various information of the battery can be monitored at the upper computer terminal, including battery voltage, current, temperature, state, SOC, SOH, battery production information and the like, and the default baud rate is 9600bps; the MCU master control circuit 1 is used for controlling the working states of the charge and discharge detection circuit 3, the temperature acquisition circuit 4, the external communication circuit 5, the drive control circuit 6 and the like in a centralized manner.

Specifically, fig. 2 is a working schematic diagram of the present utility model, and referring to fig. 1-7, the MCU master control circuit 1 includes an MCU master control chip U1, a programming interface P1, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R26, a diode D1, a diode D2, a capacitor C12 and a capacitor C16, wherein the programming interface P1, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R26, the diode D1, the diode D2, the capacitor C12 and the capacitor C16 are all connected to the MCU master control chip U1; the battery connection circuit 2 comprises a battery interface P7, a battery interface P8, a battery interface P9, a battery interface P10, a charging MOS tube bank, a discharging MOS tube bank, a voltage stabilizing tube bank and a charging and discharging output circuit, wherein the charging MOS tube bank, the discharging MOS tube bank, the voltage stabilizing tube bank and the charging and discharging output circuit are respectively connected with the battery interface P7, the battery interface P8 and the battery interface P9, the battery interface P7, the battery interface P8 and the battery interface P9 are connected with the battery interface P10, and the battery interface P10 is connected with the MCU main control chip U1; the charge-discharge detection circuit 3 comprises a voltage acquisition circuit, a current acquisition circuit, a switch wake-up detection circuit, a battery preheating circuit, a charge detection circuit, a discharge detection circuit and a load detection circuit, wherein the voltage acquisition circuit, the current acquisition circuit, the switch wake-up detection circuit, the battery preheating circuit, the charge detection circuit, the discharge detection circuit and the load detection circuit are all connected with the MCU main control chip U1, the voltage acquisition circuit comprises a capacitor C24, a capacitor C32, a capacitor C35, a voltage converter U8, a voltage converter U10 and the like, the current acquisition circuit comprises a diode D3, a diode D4, a capacitor EC1 and the like, the battery preheating circuit comprises an interface P3, a resistor R46, a resistor R48, a resistor R49, a resistor R50, a voltage stabilizing tube ZD3, a diode D7, a transistor Q13 and the like, the charge detection circuit comprises a resistor R73, a resistor R74, a resistor R77, a transistor Q16, a voltage stabilizing tube ZD7, a diode D18, a diode D13 and the like, the discharge detection circuit comprises a resistor R67, a resistor R68, a resistor R69, a resistor R71, a resistor R79, a resistor R88, a resistor R91, a resistor R92, a resistor R95, a resistor R99, a resistor R100, a capacitor C38, a transistor Q15, a transistor Q18, a capacitor C38 and the like, the switch wake-up circuit comprises an interface P6, a key S2, a resistor R85, a resistor R76, a diode D14, a diode D16, a diode D17 and the like, and the load detection circuit comprises a triode Q20, a resistor R96, a resistor R97, a resistor R98, a voltage stabilizing tube ZD9, a resistor R102, a resistor R104, a triode Q22 and the like; the temperature acquisition circuit 4 comprises a resistor R7, a resistor R8, a resistor R9, a resistor R16, a capacitor C1, a capacitor C3, a capacitor C5, a capacitor C7, a voltage stabilizing tube ZD1, a thermistor NTC1 and a thermistor NTC2, wherein the resistor R7, the resistor R8, the resistor R9, the resistor R16, the capacitor C1, the capacitor C3, the capacitor C5, the capacitor C7, the voltage stabilizing tube ZD1, the thermistor NTC1 and the thermistor NTC2 are all connected with the MCU main control chip U1; the pair of external communication circuits 5 comprises an RS232 communication chip U16, an RS485 communication chip U18, a CAN bus communication chip U13, a communication interface P11, a communication interface P12 and a communication interface P13, wherein the communication interface P11, the communication interface P12 and the communication interface P13 are respectively connected with the RS232 communication chip U16, the RS485 communication chip U18 and the CAN bus communication chip U13, and the RS232 communication chip U16, the RS485 communication chip U18 and the CAN bus communication chip U13 are all connected with the MCU main control chip U1; the driving control circuit 6 includes a driving control chip U19, a MOS driving signal detection circuit, a driving transfer circuit, a constant current control circuit and an overcurrent protection circuit, where the MOS driving signal detection circuit, the driving transfer circuit, the constant current control circuit and the overcurrent protection circuit are all connected with the driving control chip U19, the MOS driving signal detection circuit includes a resistor R259, a resistor R261, a resistor R260, and the driving transfer circuit includes a resistor R26, a resistor R269, and the like, the constant current control circuit includes a transistor Q76, a transistor Q77, a transistor Q78, a resistor R262, a resistor R263, a resistor R264, a resistor R265, a resistor R266, a resistor R267, a resistor R268, a resistor R270, a resistor R271, a resistor R272, a diode D27, and the like, the overcurrent protection circuit includes a resistor R175, a resistor R177, a resistor R178, a triode Q55, a triode Q56, a resistor R220, a capacitor C59, and the like, the driving control chip U19 is connected with the MCU master control chip U1, the driving control chip U19 may be a TMC262, and other components and other elements, and the connection circuit is not shown. It CAN be understood that the MCU master control chip U1 CAN be an STM32 single chip microcomputer chip or the like, the RS232 communication chip U16 CAN be an MAX232ESE chip or the like, the RS485 communication chip U18 CAN be an MAX485ESA chip or the like, and the CAN bus communication chip U13 CAN be an SN6517 chip or the like.

It can be understood that the battery management system of the 16-string lithium battery BMS has a voltage measurement range of 0-5V for the single battery, a total voltage measurement range of 0-60V, and the charge and discharge temperature rise is not more than 70 ℃. It has the following functional characteristics: the high-integration analog front end, the isolated power supply circuit, the integrated serial port IC, the high voltage precision, the high current precision, the 4-way battery temperature detection, the SOC estimation function, the SOH estimation function, the short-circuit protection function, the adjustable overcurrent protection function, the multi-dormancy and awakening mode, the low power consumption, the RS485 communication, the parameter adjustable setting, the data refreshing time interval less than or equal to 2 seconds, the LED state indication function, the charge equalization function, the SOC precision (more than or equal to 5% @50% capacity range) and the like. The system enters a low power mode when any of the following conditions is met: 1) The monomer or total overdischarge protection is not released within 30 seconds; 2) Pressing the key for 3-6S, and then releasing the key; 3) The lowest cell voltage is lower than the sleep voltage and the duration reaches the sleep delay time (while meeting no communication, no charger, no current); 4) The standby time exceeds the set time (meeting no communication, no charger, no current at the same time); 5) Forced shutdown is carried out through upper computer software; before entering sleep, the input end needs to be ensured not to be connected with external voltage, otherwise, the low-power consumption mode cannot be entered. When the system is in the low power consumption mode and any one of the following conditions is met, the system exits the low power consumption mode and enters the normal operation mode: 1) And (5) connecting a charger, wherein the output voltage of the charger is required to be more than 48V. 2) Pressing a key (3-6S), and releasing the key; remarks: after the single or total over-discharge protection, the low-power consumption mode is entered, the wake-up is performed at regular time every 4 hours, and the charge-discharge MOS is started; if the charging is possible, the device enters normal charging after exiting from the sleep state; if the continuous 10 times of automatic awakening can not be charged, the automatic awakening is not performed any more; when the system is defined as that after the charging is finished, the recovery voltage is not reached after the system is standby for 2 days (set value of standby time), and the charging is forcedly recovered until the recharging is finished.

It can be understood that the 16-string lithium battery BMS battery management system is provided with a double RS485 interface, can check the information of the PACK, defaults to 9600bps, and if the monitoring equipment needs to communicate with the monitoring equipment through RS485, the monitoring equipment is used as a host, and the address setting range is 1-15 according to address polling data. When the PACKs are used in parallel, different PACKs can be distinguished by setting addresses through a dial switch on the BMS, and the situation that the addresses are identical needs to be avoided. The protection board is electrified with strict sequence requirements, B-, P-, B+ and P+ are welded firstly, the battery sampling line connectors are plugged in sequence from low to high, and charging or key activation is needed after the protection board is electrified. All connecting wires can be loaded or charged after being installed. When the battery sampling line connector is removed, the charger or the load is pulled out, the battery sampling line connector is removed sequentially from high to low, and finally the battery sampling line connector B+, P+, B-and P-are removed.

It can be understood that the utility model has reasonable design and unique structure, the charge and discharge detection circuit 3 and the temperature acquisition circuit are arranged to acquire signals such as voltage, current, temperature, residual electric quantity and the like, the MCU main control circuit 1 outputs driving control signals to realize charge balance, overvoltage protection, overcurrent protection, overtemperature protection and the like, the external communication circuit realizes external transmission of signals, the integrated design is adopted to integrate functions such as acquisition, management, communication and the like, the functions are diversified, the intelligent degree is high, and the utility model can be widely applied to indoor and outdoor base stations such as integrated base stations, marginal stations, repeater stations, macro base stations, solar base stations and the like.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims (7)

1. A16-string lithium battery BMS battery management system is characterized in that: the battery connection circuit is respectively and electrically connected with the charge and discharge detection circuit, the temperature acquisition circuit and the drive control circuit, the battery connection circuit is connected with a battery end, the charge and discharge detection circuit detects temperature, voltage and current information when the battery is charged or discharged, the charge and discharge detection circuit is communicated with an upper computer through an RS232 interface, so that various information of the battery is monitored at the upper computer end, the MCU main control circuit centrally controls the charge and discharge detection circuit, the temperature acquisition circuit, the external communication circuit and the drive control circuit, and the charge and discharge detection circuit, the current, the temperature and the residual electric quantity signals are acquired by the charge and discharge detection circuit, the temperature and the residual electric quantity signals, the MCU main control circuit outputs drive control signals to realize charge, overvoltage protection and overvoltage protection, and the over-temperature protection, and the external communication circuit transmits signals.

2. The 16-string lithium battery BMS battery management system of claim 1, wherein: the MCU master control circuit comprises an MCU master control chip U1, a burning interface P1, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R26, a diode D1, a diode D2, a capacitor C12 and a capacitor C16, wherein the burning interface P1, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R26, the diode D1, the diode D2, the capacitor C12 and the capacitor C16 are all connected with the MCU master control chip U1.

3. The 16-string lithium battery BMS battery management system according to claim 2, wherein: the battery connecting circuit comprises a battery interface P7, a battery interface P8, a battery interface P9, a battery interface P10, a charging MOS tube bank, a discharging MOS tube bank, a voltage stabilizing tube bank and a charging and discharging output circuit, wherein the charging MOS tube bank, the discharging MOS tube bank, the voltage stabilizing tube bank and the charging and discharging output circuit are respectively connected with the battery interface P7, the battery interface P8 and the battery interface P9, the battery interface P7, the battery interface P8 and the battery interface P9 are respectively connected with the battery interface P10, and the battery interface P10 is connected with the MCU main control chip U1.

4. The 16-string lithium battery BMS battery management system according to claim 2, wherein: the charging and discharging detection circuit comprises a voltage acquisition circuit, a current acquisition circuit, a switch awakening detection circuit, a battery preheating circuit, a charging detection circuit, a discharging detection circuit and a load detection circuit, wherein the voltage acquisition circuit, the current acquisition circuit, the switch awakening detection circuit, the battery preheating circuit, the charging detection circuit, the discharging detection circuit and the load detection circuit are all connected with the MCU main control chip U1.

5. The 16-string lithium battery BMS battery management system according to claim 2, wherein: the temperature acquisition circuit comprises a resistor R7, a resistor R8, a resistor R9, a resistor R16, a capacitor C1, a capacitor C3, a capacitor C5, a capacitor C7, a voltage stabilizing tube ZD1, a thermistor NTC1 and a thermistor NTC2, wherein the resistor R7, the resistor R8, the resistor R9, the resistor R16, the capacitor C1, the capacitor C3, the capacitor C5, the capacitor C7, the voltage stabilizing tube ZD1, the thermistor NTC1 and the thermistor NTC2 are all connected with the MCU main control chip U1.

6. The 16-string lithium battery BMS battery management system according to claim 2, wherein: the external communication circuit comprises an RS232 communication chip U16, an RS485 communication chip U18, a CAN bus communication chip U13, a communication interface P11, a communication interface P12 and a communication interface P13, wherein the communication interface P11, the communication interface P12 and the communication interface P13 are respectively connected with the RS232 communication chip U16, the RS485 communication chip U18 and the CAN bus communication chip U13, and the RS232 communication chip U16, the RS485 communication chip U18 and the CAN bus communication chip U13 are all connected with the MCU main control chip U1.

7. The 16-string lithium battery BMS battery management system according to claim 2, wherein: the driving control circuit comprises a driving control chip U19, a MOS driving signal detection circuit, a driving transfer circuit, a constant current control circuit and an overcurrent protection circuit, wherein the MOS driving signal detection circuit, the driving transfer circuit, the constant current control circuit and the overcurrent protection circuit are all connected with the driving control chip U19, and the driving control chip U19 is connected with the MCU main control chip U1.