CN215119007U

CN215119007U - Intelligent series battery management system

Info

Publication number: CN215119007U
Application number: CN202121306552.7U
Authority: CN
Inventors: 王灏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-12-10
Anticipated expiration: 2031-06-11

Abstract

The utility model provides an intelligence series battery management system, belongs to the battery management field, its characterized in that: the device comprises a controller, an electrical parameter measuring module, a battery unit, a state switch group and a power interface module; the electrical parameter measuring module is electrically connected with the controller; the electrical parameter measuring circuit and the state switch group are electrically connected with the battery units; the power interface module is electrically connected with the battery unit; an enable position switch is arranged between the battery unit and the controller; the battery unit is electrically connected with the controller through the enable bit switch. The system can be operated independently or in a networking manner, can realize real-time detection of each battery cell of the battery unit, and realizes comprehensive and accurate measurement and control. In the maintenance process, only the battery core in a bad state can be replaced, the application cost is reduced, the service life is prolonged, the service life of the battery is prolonged, the application cost of the battery system is reduced, and the reliability and the safety of the battery management system are improved on the premise of meeting the actual use requirement.

Description

Intelligent series battery management system

Technical Field

The utility model belongs to the battery management field especially relates to an intelligence series battery management system.

Background

At present, a known battery management system is designed based on the characteristics of the existing battery electrical management application technology, especially the charging and discharging technology. The traditional battery management system can only carry out macroscopic test on the charging voltage, the discharging voltage, the charging current and the discharging current of the battery, then carry out rough battery state evaluation, and carry out large-system-level overvoltage protection, overcurrent protection, overcharge protection, overdischarge protection and the like.

However, for a battery energy storage system composed of a plurality of battery cells such as battery cells, especially for large and extra-large battery energy storage systems such as electric vehicles, marine full electric propulsion systems, industrial energy storage systems, etc., it is inaccurate and unreliable to rely on only the electrical parameters of the total input and output nodes to determine and manage the performance status of the entire battery pack. According to the characteristics of the power supply system, the state performance of the battery cells at one or more positions may seriously affect the overall performance of the whole battery pack system. Although the existing partial measurement scheme can realize the measurement of a single battery cell, due to the shortage of the battery management system, the more advanced battery cell management technology cannot be compatibly applied. And thus the performance value of the battery system cannot be improved more. Meanwhile, most of the current battery management systems cannot realize comprehensive and battery parameter measurement related to each battery core, so that the battery management systems are low in reliability and have design flaws, and great potential safety hazards are brought to battery application.

Disclosure of Invention

The utility model aims at solving the above problem, a intelligence series connection battery management system is provided.

The utility model discloses an intelligent series battery management system, including controller, electrical parameter measurement module, battery unit, status switch group and power interface module;

the electrical parameter measuring module is electrically connected with the controller; the electrical parameter measurement module converts electrical parameters of the battery into sampling measurement parameters, performs data processing through the controller after sampling to obtain monitoring parameters of the battery unit, and feeds back the monitoring parameters to be used for making control strategy adjustment;

the electrical parameter measuring module and the state switch group are electrically connected with the battery units;

the power supply interface module is electrically connected with the battery unit; the power interface module is used for externally connecting a battery load and a charging power supply, and the charging of the battery core and the power supply of the battery core to the battery load are realized through the power interface module;

an enable position switch is arranged between the battery unit and the controller; the battery unit is isolated and protected through the enabling position switch, and meanwhile, the function of the enabling electrical parameter measuring module is started, so that the electrical state of an external circuit can be monitored;

the battery unit is electrically connected with the controller through the enable position switch.

Further, in the intelligent series battery management system of the present invention, the battery unit includes a plurality of cells connected in series; the state switch group comprises a plurality of state control switches; the power supply interfaces comprise a plurality of power supply interfaces; the number of the state control switches and the number of the power interfaces are the same as the number of the battery cores;

each electric core is electrically connected with the controller through the corresponding state control switch; the controller controls the corresponding state control switch through the signal line. And the state control switch of a certain path is closed, and the electric wire switch of the battery cell corresponding to the state control switch is closed, so that the purpose of controlling the corresponding battery cell is realized.

Each electric core is electrically connected with the corresponding power interface; the power interface module is used for externally connecting a battery load and a charging power supply, and realizes charging of a corresponding battery core and power supply of the battery load by the battery core through the power interface module;

each battery cell is electrically connected with the electrical parameter measuring module; the electric parameter measurement module converts electric parameters of the battery into sampling measurement parameters, performs data processing through the controller after sampling to obtain charging voltage, discharging voltage, charging current, discharging current, no-load voltage and battery temperature of each battery cell, converts SOC and SOH data and the like of each battery cell according to the parameters, feeds back the monitored parameters to be used for making control strategy adjustment, and achieves specific fine management of the battery cells included by the battery unit.

Furthermore, the intelligent series battery management system of the utility model also comprises a memory and/or a display and/or an upper computer; the memory and/or the display and/or the upper computer are electrically connected with the controller; after each time of using the battery unit, recording the state of each battery cell connected in series in the battery unit, and storing data by a memory connected with a serial communication bus; meanwhile, the data can be displayed by a display connected with a serial communication bus, so that accurate and high-cost-performance maintenance reference information can be provided in the maintenance process; and meanwhile, the requirement of an external upper computer can be obtained, and the full closed-loop process control is carried out on the battery unit according to the requirement of an upper computer control strategy.

Further, in the intelligent series battery management system of the present invention, the controller unit is a programmable logic device; by embedding a control program in the programmable logic device, specific policy control for the battery cells included in the battery unit is realized.

Further, intelligence series battery management system, programmable logic device includes MCU or DSP or PLC or FPGA or SOC embedded microcontroller.

Intelligence series connection battery management system realizes carrying out real-time digital full cut-off loop control to the group battery that a plurality of electricity core series connection is constituteed, both can independently move and the operation of network deployment, can realize each electric core real-time detection to battery unit, realizes comprehensive accurate observing and controlling. Meanwhile, in the later maintenance process, only the battery cell with a bad state can be replaced, and the whole battery unit is not required to be replaced; therefore, the purposes of reducing the application cost and prolonging the service life are achieved, the service life of the battery is prolonged, the application cost of the battery system is reduced, and the reliability and the safety of the battery management system are improved on the premise of meeting the actual use requirement.

Drawings

Fig. 1 is a schematic structural diagram of an intelligent series battery management system according to the present invention;

fig. 2 is a schematic structural diagram of a battery unit according to an embodiment of the present invention;

fig. 3 is a schematic diagram of the control principle of the intelligent series battery management system of the present invention;

fig. 4 is a schematic diagram of a control flow of the intelligent series battery management system according to the embodiment of the present invention.

Detailed Description

The following describes the intelligent series battery management system in detail with reference to the accompanying drawings and embodiments.

The intelligent series battery management system according to the embodiment of the present disclosure, as shown in fig. 1, includes a controller, an electrical parameter measurement module, a battery unit, a status switch group, and a power interface module; the electrical parameter measuring module is electrically connected with the controller; the electrical parameter measuring circuit and the state switch group are electrically connected with the battery units; the power supply interface module is electrically connected with the battery unit; an enable position switch is arranged between the battery unit and the controller; the battery unit is electrically connected with the controller through the enable position switch.

In the embodiment of the present disclosure, as shown in fig. 2, the battery unit includes three cells connected in series; the number of the state control switches and the number of the power interfaces are the same as the number of the battery cores. Each electric core is electrically connected with the controller through the corresponding state control switch; each electric core is electrically connected with the corresponding power interface; each battery cell is electrically connected with the electrical parameter measuring module.

The embodiment of the present disclosure is further provided with a memory, a display and an upper computer; the memory, the display and the upper computer are all electrically connected with the controller; in the embodiment of the present disclosure, the controller employs an MCU.

As shown in fig. 1, in the embodiment of the present disclosure, the electrical parameter measurement module is a module that is connected to a battery electrical bus, and performs circuit conversion on electrical parameters of each line into electrical parameters that can be sampled and measured by an ADC or electrical parameters that can be measured by a related sensor, and then performs sampling measurement or other communication on parameters of 4 electrical lines by the ADC bus connected to the embedded controller to obtain corresponding sensor measurement data, and the embedded controller calculates related direct measurement parameter values such as charging voltage, charging current, discharging voltage, discharging current, no-load voltage, and battery temperature of each battery cell.

Four signal lines USb _0001, USb _0010, USb _0100 and USb _1000 of the embedded controller respectively control state control switches corresponding to Ctrl _0001, Ctrl _0010, Ctrl _0100 and Ctrl _1000 signals, the switches are closed, the corresponding Ctrl lines enable, and switches of battery electrical lines controlled by the corresponding Ctrl lines are closed, so that control over corresponding battery cells is achieved; the charging/discharging state control correspondence relationship of the three battery cells according to the embodiment of the present disclosure is shown in table 1 below.

TABLE 1

USb control bus value	Power bus on state	Charge/discharge object
			0011	PWR_0001\PWR_-	Battery cell 1
0110	PWR_0010\PWR_0001	Battery cell				2
			1100	PWR_0100\PWR_0010	Battery cell		3
0101	PWR_0010\PWR_-	Battery cells 1, 2
			1010	PWR_0100\ PWR_0001	Cells		2, 3
1001	PWR_0100\PWR_-	Battery cell 1, 2, 3

As shown in fig. 3, in the embodiment of the present disclosure, the MCU controller obtains the requirements of an external upper computer through a Serial Communication Bus (SCB) communication serial port, and performs a full closed-loop process control on the serial battery unit according to the requirements of an upper computer control strategy. Firstly, mode selection is carried out according to the load connected to the charging/discharging interface. In the embodiment of the present disclosure, a charging power source (i.e., a charging load) is externally accessed, and the mode is selected as a charging mode; the method comprises the steps of controlling a switch array to charge a serial battery unit according to a control strategy required by an upper system, converting electrical parameters of the battery unit into sampling measurement parameters by an electrical parameter measurement module, sampling the sampling measurement parameters by an MCU (micro control unit), carrying out data processing to obtain charging voltage, discharging voltage, charging current, discharging current, no-load voltage and battery temperature of each battery cell, converting SOC (state of charge) and SOH (state of health) data and the like of each battery cell according to the parameters, and finally feeding back all the parameters for making control strategy adjustment. The serial communication bus simultaneously transmits the operation data to the outside in real time, and stores or displays the operation data so as to provide accurate and high-cost-performance maintenance reference information in the maintenance process.

As shown in fig. 4, when the series battery is managed, after the self-test is performed during the power-on, the enable bit switch UEb enables the electrical parameter measurement function, so as to monitor the electrical state of the external circuit. When the external state is identified to be connected with a charging power supply (namely a charging load), the whole system is automatically controlled to enter a charging mode control cycle; when an external power load (namely a discharging load) is identified, automatically controlling the whole system to enter a discharging mode control cycle; when the external state is identified to be no-load, automatically controlling the whole system to enter a no-load mode control cycle; and then, carrying out closed-loop process control on the charging and discharging process according to the own control strategy scheme and implementation of sampling measurement data, and realizing emergency protection mechanisms such as overvoltage protection, overcurrent protection, overcharge protection, overdischarge protection, overheat protection and the like in the process.

Claims

1. An intelligent series battery management system, characterized in that: the device comprises a controller, an electrical parameter measuring module, a battery unit, a state switch group and a power interface module;

the electrical parameter measuring module is electrically connected with the controller;

the electrical parameter measuring circuit and the state switch group are electrically connected with the battery units;

the power supply interface module is electrically connected with the battery unit;

an enable position switch is arranged between the battery unit and the controller;

2. The intelligent series battery management system of claim 1, wherein: the battery unit comprises a plurality of battery cores connected in series; the state switch group comprises a plurality of state control switches; the power supply interfaces comprise a plurality of power supply interfaces; the number of the state control switches and the number of the power interfaces are the same as the number of the battery cores;

each electric core is electrically connected with the controller through the corresponding state control switch;

each electric core is electrically connected with the corresponding power interface;

each battery cell is electrically connected with the electrical parameter measuring module.

3. The intelligent series battery management system of claim 1 or 2, wherein: the device also comprises a memory and/or a display and/or an upper computer; the memory and/or the display and/or the upper computer are electrically connected with the controller.

4. The intelligent series battery management system of claim 3, wherein: the controller unit is a programmable logic device.

5. The intelligent series battery management system of claim 4, wherein: the programmable logic device comprises an MCU (microprogrammed control Unit), a DSP (digital signal processor), a PLC (programmable logic controller), an FPGA (field programmable gate array) or an SOC (System on chip) embedded microcontroller.