CN215154067U

CN215154067U - Novel integrated BMS battery management system

Info

Publication number: CN215154067U
Application number: CN202121544336.6U
Authority: CN
Inventors: 郑俊涛; 邹献平
Original assignee: Huyu Digital Energy Technology Shenzhen Co ltd
Current assignee: Huyu Digital Energy Technology Shenzhen Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-12-14
Anticipated expiration: 2031-07-07

Abstract

The utility model relates to the technical field of battery management, specifically a novel integrated BMS battery management system, including the balanced module of voltage limiting constant current, the balanced module of voltage limiting constant current is connected with the MCU singlechip through electric connection's mode, the MCU singlechip other end is connected with DC-DC circuit module through electric connection's mode, the balanced module of voltage limiting constant current includes the voltage division module, the voltage division module is equipped with the voltage limiting constant current module through electric connection's mode, the voltage limiting constant current module is connected with balanced switch module through electric connection's mode, balanced switch module is connected with opto-coupler isolation control through electric connection's mode, has increased novel two-way DC-DC circuit module, realizes the higher conversion efficiency than traditional two-way DC-DC circuit module; the hybrid use of the lithium battery and the lead-acid battery is realized; the functions of high-efficiency intelligent charging and discharging, peak clipping and valley filling and the like are realized.

Description

Novel integrated BMS battery management system

Technical Field

The utility model relates to a battery management technical field specifically is a novel integration BMS battery management system.

Background

The BMS System refers to a Battery Management System (english: Battery Management System) for managing batteries, and the BMS is mainly used for intelligently managing and maintaining each Battery unit, preventing the batteries from being overcharged and overdischarged, prolonging the service life of the batteries, and monitoring the states of the batteries, and is an important link for connecting a vehicle-mounted power Battery and an electric vehicle. The BMS collects, processes and stores important information in the running process of the battery pack in real time, exchanges information with external equipment such as a vehicle control unit, solves key problems of safety, usability, service life and the like in a lithium battery system, and has the main functions of improving the utilization rate of the battery, preventing the battery from being overcharged and overdischarged, prolonging the service life of the battery and monitoring the state of the battery. Generally speaking, the system is a set of system for managing, controlling and using the battery pack.

In the existing battery management system, the traditional DC-DC circuit module has large switching tube switching time voltage and large current, which causes large switching tube loss, large inductance loss, low conversion efficiency and low conversion efficiency, and the equalizing circuit voltage division module has large power consumption and heat emission pressure; the equalizing circuit has weak port impact resistance and poor reliability.

There is a need to develop a new integrated BMS battery management system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel integrated BMS battery management system, which realizes higher conversion efficiency than the traditional bidirectional DC-DC circuit module through the arranged novel DC-DC circuit; the hybrid use of the lithium battery and the lead-acid battery is realized; the functions of efficient intelligent charging and discharging, peak clipping and valley filling and the like are realized so as to solve the problems that the traditional DC-DC circuit module has large switching tube switching time voltage and large current, which causes large switching tube loss, large inductance loss, low conversion efficiency and low conversion efficiency, and the equalizing circuit voltage division module has large power consumption and heat emission and large heat dissipation pressure; the equalizing circuit has weak port impact resistance and poor reliability.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel integrated BMS battery management system, includes voltage limiting constant current balancing module, voltage limiting constant current balancing module is connected with the MCU singlechip through electric connection's mode, the MCU singlechip other end is connected with DC-DC circuit module through electric connection's mode, voltage limiting constant current balancing module includes the voltage division module, the voltage division module is equipped with voltage limiting constant current module through electric connection's mode, voltage limiting constant current module is connected with the balanced switch module through electric connection's mode, the balanced switch module is connected with opto-coupler isolation control through electric connection's mode.

Preferably, the MCU singlechip is connected with a power module in an electrically connected mode, the MCU singlechip is connected with a storage chip in an electrically connected mode, and the specific model of the storage chip is EEPROM.

Preferably, the MCU singlechip is provided with a communication module in an electrically connected mode, and the MCU singlechip is connected with a temperature acquisition module in an electrically connected mode.

Preferably, the MCU singlechip is connected with a voltage acquisition module in an electrically connected mode, and the MCU singlechip is connected with a dry contact in an electrically connected mode.

Preferably, the equalization switch module is specifically an equalization switch MOS transistor.

Preferably, the DC-DC circuit module includes four switching tubes, adjacent switching tubes are electrically connected by an electrical line, every two switching tubes are electrically connected by an inductance coil, and the switching tubes are electrically connected to the PWM system.

Compared with the prior art, the beneficial effects of the utility model are that:

1. a novel bidirectional DC-DC circuit module is added, so that higher conversion efficiency is realized than that of the traditional bidirectional DC-DC circuit module; the hybrid use of the lithium battery and the lead-acid battery is realized; the functions of high-efficiency intelligent charging and discharging, peak clipping and valley filling and the like are realized.

2. The voltage-limiting constant-current module is connected in series, so that when the balance switch MOS is failed and short-circuited, the single battery cannot be damaged by discharging to 0V all the time, and the single battery cell is effectively protected from over-discharging; the power consumption and the heat dissipation pressure of the voltage division module are greatly reduced, and the requirement of larger balanced current can be met.

Drawings

Fig. 1 is a schematic structural diagram of the voltage-limiting constant-current balancing module of the present invention;

fig. 2 is a schematic diagram of a circuit structure of the voltage-limiting constant-current balancing module of the present invention;

FIG. 3 is a schematic structural diagram of the MCU singlechip of the present invention;

fig. 4 is a schematic structural diagram of the DC-DC circuit module of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a following technical scheme: a novel integrated BMS battery management system is provided with a novel bidirectional DC-DC circuit module, and achieves higher conversion efficiency than the traditional bidirectional DC-DC circuit module; the hybrid use of the lithium battery and the lead-acid battery is realized; the device realizes functions of efficient intelligent charging and discharging, peak clipping and valley filling and the like, and please refer to fig. 1-4, and comprises a voltage-limiting constant-current balancing module, wherein the voltage-limiting constant-current balancing module is electrically connected with an MCU (microprogrammed control unit) singlechip, the other end of the MCU singlechip is electrically connected with a DC-DC circuit module, the voltage-limiting constant-current balancing module comprises a voltage-dividing module, the voltage-limiting constant-current module is arranged on the voltage-dividing module in an electrically connected manner, the voltage-limiting constant-current module is electrically connected with a balancing switch module, the balancing switch module is electrically connected with an optocoupler isolation control, the balancing switch module is a balancing switch MOS (metal oxide semiconductor) tube, and specifically, the voltage-limiting constant-current balancing module is arranged for balancing a voltage starting threshold from an upper limit value of a hardware circuit, the voltage-dividing module is arranged for dividing a battery voltage and facilitating balancing treatment of the battery, the optical coupler isolation control is that an optical coupler is adopted for isolation, the structure of the optical coupler is equivalent to that a light emitting diode and a phototriode are packaged together, the optical coupler isolation circuit ensures that no electric direct connection exists between two isolated circuits, the interference caused by the electric connection is mainly prevented, particularly, an optical coupler isolation switch is adopted for control between a low-voltage control circuit and an external high-voltage circuit, the anti-interference capability and the reliability of the control circuit are improved, an MOS (metal oxide semiconductor) tube is a metal oxide semiconductor field effect transistor or a metal insulator semiconductor, the source and drain of the MOS tube can be exchanged and are both an N-type region formed in a P-type back gate, and a balance switch MOS tube is arranged for controlling a voltage-limiting constant current circuit;

further, the MCU singlechip is electrically connected with a power supply module, the MCU singlechip is electrically connected with a storage chip, the storage chip is an EEPROM, the MCU singlechip is electrically connected with a communication module, the MCU singlechip is electrically connected with a temperature acquisition module, the MCU singlechip is electrically connected with a voltage acquisition module, the MCU singlechip is electrically connected with a dry junction, specifically, the set power supply module is an external power supply and is used for providing electric quantity for the operation of the MCU singlechip, the EEPROM is an erasable programmable read-only memory which is a storage chip without data loss after power failure, the set temperature acquisition module is a temperature sensor, the specific type is an NTC thermistor sensor, and the set voltage acquisition module is a voltage measuring device, the specific model of the electronic multimeter is f15b, the dry contact is an electric switch, and has 2 states of on and off, and the two contacts of the dry contact have no polarity and can be interchanged;

furthermore, the DC-DC circuit module comprises four switching tubes, adjacent switching tubes are electrically connected through an electric wire, an inductance coil is connected between every two switching tubes in an electric connection mode, the switching tubes are electrically connected with a PWM system, the set switching tubes are used for enabling the DC-DC circuit module to be matched with a software active current-sharing control technology to achieve hybrid use of a lithium battery and a lead-acid battery, the PWM system is a pulse width modulation system for short, is an effective technology for controlling an analog circuit by utilizing digital output of a microprocessor, and is widely applied to a plurality of fields from measurement, communication to power control and conversion.

The working principle is as follows: firstly, technicians connect all the used devices according to the attached drawings, then open the horizontal switch module, the positive end of the single battery starts to transmit current, the set voltage division module can divide the voltage of the battery, the set voltage limiting constant current module can limit the current transmitted by the battery, the current limiting constant current module shares most of power consumption, equivalently, the heat dissipation area is increased, the heat dissipation pressure is greatly reduced, the requirement of larger equalizing current can be met, then the current can enter the MCU singlechip, the MCU singlechip can measure the voltage passing through the MCU singlechip through the voltage collection module, the set temperature collection module can measure the temperature of the MCU singlechip, the MCU singlechip can transmit the current into the DC-DC circuit module, the 4-way switches in the DC-DC circuit module are controlled in a full PWM manner, and the charging and discharging do not need to be switched off, a zero response is achieved. The novel bidirectional DC-DC circuit module is matched with software, adopts an active current-sharing control technology, and can support the mixed use of a lithium battery and a lead-acid battery; the peak clipping and valley filling functions are realized, the problems of insufficient peak power supply power and low valley power waste are solved, and the power grid energy is reasonably and efficiently used.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a novel integration BMS battery management system which characterized in that: the voltage-limiting constant-current balancing circuit comprises a voltage-limiting constant-current balancing module, wherein the voltage-limiting constant-current balancing module is connected with an MCU (microprogrammed control unit) single chip microcomputer in an electrically connected mode, the other end of the MCU single chip microcomputer is connected with a DC-DC circuit module in an electrically connected mode, the voltage-limiting constant-current balancing module comprises a voltage-dividing module, the voltage-dividing module is provided with the voltage-limiting constant-current module in an electrically connected mode, the voltage-limiting constant-current module is connected with a balancing switch module in an electrically connected mode, and the balancing switch module is connected with an optical coupler isolation control in an electrically connected mode.

2. The novel integrated BMS battery management system of claim 1, characterized in that: the MCU singlechip is connected with a power module in an electric connection mode, the MCU singlechip is connected with a storage chip in an electric connection mode, and the specific model of the storage chip is EEPROM.

3. The novel integrated BMS battery management system of claim 2, characterized in that: the MCU singlechip has communication module through electric connection's mode, the MCU singlechip is connected with temperature acquisition module through electric connection's mode.

4. The novel integrated BMS battery management system of claim 3, characterized in that: the MCU singlechip is connected with a voltage acquisition module in an electric connection mode, and the MCU singlechip is connected with a dry contact in an electric connection mode.

5. The novel integrated BMS battery management system of claim 1, characterized in that: the equalization switch module is specifically an equalization switch MOS tube.

6. The novel integrated BMS battery management system of claim 1, characterized in that: the DC-DC circuit module comprises four switching tubes, the adjacent switching tubes are electrically connected through an electric wire, every two switching tubes are connected with an inductance coil in an electric connection mode, and the switching tubes are electrically connected with the PWM system.