CN103779943A

CN103779943A - Battery management system of electric car

Info

Publication number: CN103779943A
Application number: CN201410058163.5A
Authority: CN
Inventors: 邬学建
Original assignee: 奇瑞汽车股份有限公司
Priority date: 2014-02-20
Filing date: 2014-02-20
Publication date: 2014-05-07
Also published as: CN103779943B

Abstract

The invention discloses a battery management system of an electric car. The battery management system is characterized in that the management system is of a redundant backup structure formed by a single chip microcomputer and an FPGA through a data line, the single chip microcomputer and the FPGA are respectively connected into a control I/O unit through a master control and detection line and a backup control and detection line, and the control I/O unit is connected into a controlled object through a signal line. According to the system, the FPGA is used as a backup system, the advantages of being programmable and high in response speed of the FPGA are utilized, the flexibility and integrality of the system are greatly enhanced, and the number of fault points of the system is reduced.

Description

A kind of battery management system of electric automobile

Technical field

The present invention relates to the field that manufactures and designs of electric automobile, particularly a kind of battery management system of electric automobile.

Background technology

Along with the enhancing of people's environmental consciousness, problem of environmental pollution is more and more subject to people's attention, electric automobile as a kind of automobile of novel energy in the advantage that has traditional fuel vehicle to reach aspect discharge.

Follow growing with each passing day of electric automobile output, its functional safety will be the important indicator of evaluation system reliability, but the design of the functional safety under current situation seriously lags behind other kernel components as the battery management system of electric automobile kernel component.

For the problems referred to above, for electric automobile provides a kind of novel battery management system, battery pack is carried out to safety management, avoiding issuable accident is the problem that prior art need to solve.

Summary of the invention

Technical problem to be solved by this invention is, a kind of battery management system of electric automobile is provided, and battery pack is carried out to safety management, avoids issuable accident.

For achieving the above object, technical scheme of the present invention is that a kind of battery management system of electric automobile, is characterized in that: described management system is that single-chip microcomputer and FPGA form redundancy backup structure by data wire; Single-chip microcomputer, FPGA respectively by master control, detection line and Standby control, detection line access control I O unit, control I O unit access controlled device by holding wire.

In described FPGA, be provided with control algolithm hard wire logic unit, control algolithm hard wire logic unit with control I O unit be connected by Standby control, detection line.

Between described single-chip microcomputer and FPGA, be connected by auxiliary control port.

When described single-chip microcomputer detects FPGA operation exception, by auxiliary control port, the control of FPGA, detection port are set to high-impedance state, make the control signal of FPGA invalid, avoid the mistake output of FPGA to cause the malfunction of controlled device; In FPGA and single-chip data reciprocal process, in the time that FPGA detects single-chip microcomputer output data exception, by the built-in control algolithm hard wire logic unit of FPGA by Standby control, detection line, through control I O unit controls controlled device.

Described single-chip microcomputer receives the sensor signal that battery pack sensor passes is come in real time.

Described single-chip microcomputer is provided with vehicle PORT COM.

Described FPGA can also replace with PLD, CPLD.

A battery management system for electric automobile, the present invention is using FPGA as standby system, utilizes that FPGA is able to programme, the feature of fast response time, strengthened greatly the flexibility of system, and integrated level has reduced the fault point number of system.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;

Fig. 1 is the structural representation of the battery management system of a kind of electric automobile of the present invention;

In Fig. 1,1, controlled device; 2, holding wire; 3, control I O unit; 4, Standby control, detection line; 5, control algolithm hard-wired logic circuit; 6, FPGA; 7, auxiliary control port; 8, data wire; 9, single-chip microcomputer; 10, master control, detection line; 11, transducer; 12, sensor signal; 13, vehicle PORT COM.

Embodiment

As shown in Figure 1, the present invention is that single-chip microcomputer 9 forms redundancy backup structure with FPGA6 by data wire 8; Single-chip microcomputer 9, FPGA6 respectively by master control, detection line 10 and Standby control, detection line 4 access control I O unit 3, control I O unit 3 access controlled device 1 by holding wire 2.

In FPGA6, be provided with control algolithm hard wire logic unit 5, control algolithm hard wire logic unit 5 with control I O unit 3 be connected by Standby control, detection line 4.Between single-chip microcomputer 9 and FPGA6, be connected by auxiliary control port 7.

Single-chip microcomputer 9 receives the sensor signal 12 that battery pack transducer 11 passes in real time.Single-chip microcomputer 9 is provided with vehicle PORT COM 13.

The hardware redundancy standby system of the present invention using FPGA6 as single-chip microcomputer 9.In system running, in the time detecting that single-chip microcomputer 9 or other hardware circuit break down, FPGA6 is as standby system, take over the work relevant to functional safety, according to the operation conditions of vehicle, control battery management system and enter safe pattern, avoid issuable accident.The present invention is using FPGA6 as standby system, utilizes that FPGA6 is able to programme, the feature of fast response time, strengthened greatly the flexibility of system, and integrated level has reduced the fault point number of system.

FPGA6 is field programmable gate array, is one and contains the semiconductor equipment that can edit element, is available for users to the logic gate array element of on-the-spot sequencing.And battery management system is the utilance in order to improve battery, prevent that battery from occurring overcharging and overdischarge, extend the useful life of battery, the system of monitoring battery state.

FPGA6 is programming device, and PLD, CPLD also belong to programming device, although there is each other difference, PLD, CPLD also can be used for system described in the invention.

CPLD is the logic element that a kind of conformability is higher.Owing to having high conformability, therefore it has performance boost, reliability increases, degradation advantage under the minimizing of PCB area and cost.PLD is as a kind of universal integrated circuit, and its logic function decides device programming according to user.

Add the version of FPGA6 by single-chip microcomputer 9, refer to using FPGA6 or other programmable logic device as standby redundancy system, for improving the reliability of system, the battery management system of all this frameworks is all in the protection range of this patent.

The sensor signal 12 that single-chip microcomputer 9 transmits by transducer 11 being detected, controls after treatment controlled device 1 and carries out corresponding action.

Single-chip microcomputer 9 carries out the communication of data in running with FPGA6, by the mutual detecting & monitoring of transmission of particular data.FPGA6 operation exception detected once single-chip microcomputer 9, by auxiliary control port 7, the control of FPGA6, detection port are set to high-impedance state, make the control signal of FPGA6 invalid, avoid the mistake output of FPGA6 to cause the malfunction of controlled device.

In FPGA6 and single-chip microcomputer 9 data exchange process, in the time that FPGA6 detects that single-chip microcomputer 9 is exported data exception, by the built-in control algolithm hard-wired logic circuit of FPGA6 by Standby control, detection line 4, through control I O unit 3 control controlled device.

In the present invention, single-chip microcomputer 9 and FPGA6 can be by controlling, testing circuit detects the state of controlled device 1, as fallback circuit, FPGA6 is transferred to single-chip microcomputer 9 by the data of detection by data wire 8, single-chip microcomputer 9 is by master control, detection line 10 and Standby control, the detection data of detection line 4 compare, once the data that detect are not identical, single-chip microcomputer 9 passes through oneself state, whole vehicle state, with the mutual data of car load, the comprehensive reasonability of analyzing data, further controlled device 1 is controlled, and by failure logging in nonvolatile memory, being convenient to diagnostic device diagnoses.

Because FPGA6 has programmable characteristic, make function that FPGA6 is responsible have the possibility of a lot of optimizations, by programming, be easy to optimize the function of circuit in FPGA6, along with the issue of product, need not be by the upgrading of hardware, can reach the object of the circuit of optimizing hardware, reduced greatly cycle and the expense of product up-gradation, for focusing on the battery management system of functional safety, the system architecture described in this patent has very strong flexibility, dependable with function.

By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted technical solution of the present invention to carry out, or directly apply to other occasion without improvement, all within protection scope of the present invention.

Claims

1. a battery management system for electric automobile, is characterized in that: described management system is single-chip microcomputer (9) and FPGA(6) forms redundancy backup structure by data wire (8); Single-chip microcomputer (9), FPGA(6) respectively by master control, detection line (10) and Standby control, detection line (4) access control I O unit (3), control I O unit (3) by holding wire (2) access controlled device (1).

2. the battery management system of a kind of electric automobile according to claim 1, it is characterized in that: described FPGA(6) in be provided with control algolithm hard wire logic unit (5), control algolithm hard wire logic unit (5) with control I O unit (3) be connected by Standby control, detection line (4).

3. the battery management system of a kind of electric automobile according to claim 1, is characterized in that: described single-chip microcomputer (9) and FPGA(6) between be connected by auxiliary control port (7).

4. the battery management system of a kind of electric automobile according to claim 1, it is characterized in that: described single-chip microcomputer (9) detects FPGA(6) when operation exception, by auxiliary control port (7) by FPGA(6) control, detection port be set to high-impedance state, make FPGA(6) control signal invalid, avoid FPGA(6) mistake output cause the malfunction of controlled device (1); At FPGA(6) with single-chip microcomputer (9) data exchange process in, as FPGA(6) when single-chip microcomputer (9) output data exception detected, pass through FPGA(6) built-in control algolithm hard wire logic unit (5) by Standby control, detection line (4) through control I O unit (3) control controlled device (1).

5. the battery management system of a kind of electric automobile according to claim 1, is characterized in that: described single-chip microcomputer (9) receives the sensor signal (12) that battery pack transducer (11) passes in real time.

6. the battery management system of a kind of electric automobile according to claim 1, is characterized in that: described single-chip microcomputer (9) is provided with vehicle PORT COM (13).

7. according to the battery management system of a kind of electric automobile described in claim 1 or 4, it is characterized in that: described FPGA(6) can also replace with PLD, CPLD.