CN201327529Y

CN201327529Y - Lithium-ion power battery grouping monitor system

Info

Publication number: CN201327529Y
Application number: CNU2008202211740U
Authority: CN
Inventors: 韩改燕; 王春录; 杨桦
Original assignee: Sky Energy (Luoyang) Co Ltd
Current assignee: China Aviation Lithium Battery Co Ltd
Priority date: 2008-11-21
Filing date: 2008-11-21
Publication date: 2009-10-14
Anticipated expiration: 2018-11-21

Abstract

The utility model relates to a lithium-ion power battery grouping monitor system which comprises a main control board. The main control board is connected with at least a data acquisition board through a CAN 2.0 bus; a temperature sensor is arranged on each data acquisition board; the temperature sensors are connected with the data acquisition boards through serial single bus; the input port of each data acquisition board is connected with the electrode of each single battery in a small battery pack corresponding to the data acquisition board; a current sensor is arranged on the bus-bar of the whole battery pack which is monitored; the output port of the current sensor is connected with the main control board; and a liquid crystal display and a keyboard are also connected with the main control board. The utility model can solve the problem of dividing lithium-ion power batteries with different performance into groups.

Description

Lithium-ion-power cell grouping monitoring system

Technical field

The utility model relates to a kind of lithium-ion-power cell grouping monitoring system, belongs to the battery detection field.

Background technology

In national Eleventh Five-Year Plan scientific and technical development program, " improve ecology and environment " and become the significant problem that improves concerning the sustainable development of socio-economy and people's living standard, the environmental type lithium ion battery can replace lead-acid battery, the nickel-cadmium battery that has pollution hidden trouble, is efficient, the cleaning accumulator that belongs to national encourage growth.So the problem that the lithium-ion-power cell existence can not be abused and fine grouping is used is most important at the exploitation of lithium-ion-power cell grouping monitoring application.Along with the application of lithium-ion-power cell is increasingly extensive, the numerous producers in home and abroad drop into research and development strength one after another, develop supporting with it battery management system or charging system, but the research and development of lithium-ion-power cell grouping application system are not had enough attention.It is the basic of lithium battery applications that the grouping of battery is used, the battery group monitoring technology that does not have early stage, rationally the battery to performance difference divides into groups, battery management system and charging system are perfect again, the service efficiency and the safety problem of lithium-ion-power cell can not be solved, the characteristic of lithium ion battery can not be given full play to.

The utility model content

The purpose of this utility model provides a kind of lithium-ion-power cell grouping monitoring system that the lithium-ion-power cell of the performance difference in the lithium-ion-power cell group is monitored in real time, the problem of rationally dividing into groups with the lithium-ion-power cell that solves performance difference.

For achieving the above object, the utility model adopts following technical scheme: a kind of lithium-ion-power cell grouping monitoring system, this system comprises a master control borad, this master control borad links to each other with at least one data acquisition board by the CAN2.0 bus, each data acquisition board is provided with a temperature sensor, this temperature sensor is connected into data acquisition board by the serial unibus, the input port of each data acquisition board connects on the electrode of each cell in the little Battery pack corresponding with it, the bus of monitored whole battery group is provided with current sensor, the output of current sensor is connected into master control borad, and this master control borad also is connected with liquid crystal display and keyboard.

Described master control borad comprises host scm, main data memory, real time clock circuit and CAN2.0 bus interface circuit, described main data memory is connected into the corresponding I/O mouth of host scm, described real time clock circuit mainly is made of real-time timepiece chip, real-time timepiece chip is by self serial data I/O port and the serial clock input port corresponding timer external input port that connects host scm respectively, described CAN2.0 bus interface circuit mainly is made of the CAN2.0 interface chip, and the CAN2.0 interface chip is by self serial port receiver input port and the serial port transmitter output port serial port receiver input port and the serial port transmitter output port that connect host scm respectively.

Described data acquisition board comprises sub-single-chip microcomputer, subdata storer, CAN2.0 bus interface circuit, described subdata storer is connected into the corresponding I/O mouth of sub-single-chip microcomputer, described CAN2.0 bus interface circuit mainly is made of the CAN2.0 interface chip, and the CAN2.0 interface chip is by self serial port receiver input port and the serial port transmitter output port serial port receiver input port and the serial port transmitter output port that connect sub-single-chip microcomputer respectively.

Adopt the technical program, realized following beneficial effect: the cell voltage of each cell in group's lithium-ion-power cell that each data acquisition board will be corresponding with it and the temperature of collection send to master control borad by the CAN2.0 bus, the current sensor that is located on the monitored whole lithium-ion-power cell group bus is input to master control borad with the current signal of gathering, host scm in the master control borad goes out the state-of-charge of lithium-ion-power cell group according to the charging and discharging currents of the lithium-ion-power cell group that records and according to the Time Calculation that discharges and recharges that real time clock circuit provides, and the data that master control borad will record data and calculating show by liquid crystal indicator; So that operating personnel judge the battery performance consistance of monitored lithium-ion-power cell group according to each parameter, the lithium-ion-power cell of performance difference is rationally divided into groups, improve the service efficiency of lithium-ion-power cell group.

Description of drawings

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

Fig. 2 is the block diagram of master control borad;

Fig. 3 is the block diagram of data acquisition board.

Embodiment

Fig. 1 is a block diagram of the present utility model, it comprises a master control borad, this master control borad is connected at least one data acquisition board by the CAN2.0 bus, each data acquisition board is connected with a temperature sensor, this temperature sensor is connected into and its corresponding data collection plate by the serial unibus, the input port of each data acquisition board connects on the electrode of cell of group's lithium-ion-power cell corresponding with it, the bus of whole group of tested lithium-ion-power cell is provided with a current sensor, the output of current sensor is connected into master control borad, and this master control borad also is connected with liquid crystal display and keyboard.

Fig. 2 is the block diagram of master control borad, it comprises single chip computer AT MEGA64L, CAN2.0 interface chip SJA1000, data storer and real-time timepiece chip PCF8563T, described CAN2.0 interface chip SJA1000 is connected into single chip computer AT MEGA64L corresponding ports, described real-time timepiece chip also is connected into single chip computer AT MEGA64L corresponding ports, described data-carrier store is connected into the I/O mouth of single chip computer AT MEGA64L, the AD passage 0 of described single chip computer AT MEGA64L connects the output of Hall element, and single chip computer AT MEGA64L also is connected with liquid crystal display and keyboard.

Fig. 3 is the block diagram of data acquisition board, it comprises single chip computer AT MEGA8L, CAN2.0 interface chip SJA1000, data-carrier store and temperature sensor DS18B20, described CAN2.0 interface chip SJA1000 is connected into single chip computer AT MEGA8L corresponding ports, described data-carrier store is connected into the I/O mouth of single chip computer AT MEGA8L, the I/O mouth of single chip computer AT MEGA8L also is connected with temperature sensor DS18B20, and 8 AD passages of single chip computer AT MEGA8L connect 8 cells corresponding with it respectively.

Principle of work of the present utility model is: any a plurality of lithium-ion-power cells are composed in series an electric battery, the cell voltage of each cell of the corresponding group's lithium-ion-power cell that links to each other with this data acquisition board is gathered in the input port of each data acquisition board, the temperature sensor that is connected into data acquisition board by the serial unibus is input to data acquisition board with the temperature parameter that records, data acquisition board sends to master control borad to the voltage and the temperature parameter that record by the CAN2.0 bus, current sensor is input to master control borad to the charging and discharging currents of detected lithium-ion-power cell group, the time that discharges and recharges that charging and discharging currents that host scm basis in the master control borad records and real time clock circuit provide, what will record at last showed by liquid crystal indicator with parameters calculated by calculating the state-of-charge of whole lithium-ion-power cell group.

Claims

1, a kind of lithium-ion-power cell grouping monitoring system, it is characterized in that: this system comprises a master control borad, this master control borad links to each other with at least one data acquisition board by the CAN2.0 bus, each data acquisition board is provided with a temperature sensor, this temperature sensor is connected into data acquisition board by the serial unibus, the input port of each data acquisition board connects on the electrode of each cell in the little Battery pack corresponding with it, the bus of monitored whole battery group is provided with current sensor, the output of current sensor is connected into master control borad, and this master control borad also is connected with liquid crystal display and keyboard.

2, lithium-ion-power cell grouping monitoring system according to claim 1, it is characterized in that: described master control borad comprises host scm, main data memory, real time clock circuit and CAN2.0 bus interface circuit, described main data memory is connected into the corresponding I/O mouth of host scm, described real time clock circuit mainly is made of real-time timepiece chip, real-time timepiece chip is by self serial data I/O port and the serial clock input port corresponding timer external input port that connects host scm respectively, described CAN2.0 bus interface circuit mainly is made of the CAN2.0 interface chip, and the CAN2.0 interface chip is by self serial port receiver input port and the serial port transmitter output port serial port receiver input port and the serial port transmitter output port that connect host scm respectively.

3, lithium-ion-power cell grouping monitoring system according to claim 1 and 2, it is characterized in that: described data acquisition board comprises sub-single-chip microcomputer, subdata storer, CAN2.0 bus interface circuit, described subdata storer is connected into the corresponding I/O mouth of sub-single-chip microcomputer, described CAN2.0 bus interface circuit mainly is made of the CAN2.0 interface chip, and the CAN2.0 interface chip is by self serial port receiver input port and the serial port transmitter output port serial port receiver input port and the serial port transmitter output port that connect sub-single-chip microcomputer respectively.