CN204271704U - Based on the batteries management system of CAN - Google Patents

Based on the batteries management system of CAN Download PDF

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Publication number
CN204271704U
CN204271704U CN201420812441.7U CN201420812441U CN204271704U CN 204271704 U CN204271704 U CN 204271704U CN 201420812441 U CN201420812441 U CN 201420812441U CN 204271704 U CN204271704 U CN 204271704U
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China
Prior art keywords
battery
module
communication
management
chip microcomputer
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Expired - Fee Related
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CN201420812441.7U
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Chinese (zh)
Inventor
赵永成
张步伟
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Shaanxi Sai Leiborui New Energy Technology Co Ltd
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Shaanxi Sai Leiborui New Energy Technology Co Ltd
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Abstract

The utility model discloses a kind of batteries management system based on CAN, comprises the battery pack be made up of the power brick comprising battery cell; Scoring Lian Jie N number of battery management module of a power brick; By the ARM controller of CAN and each battery management module communication; Battery management module comprises single-chip microcomputer, the voltage be connected with single-chip microcomputer input, electric current, temperature collect module; The equalizing circuit be connected is exported, thermal-shutdown circuit, alarm module with single-chip microcomputer, and the debug serial port of both-way communication and CAN communication unit.Native system can complete the voltage of each battery cell of battery pack, charging and discharging currents, temperature parameter acquisition and display, can calculate the state-of-charge (SOC) of each battery cell in real time.Native system completes the real time correction of monomer SOC by equalizing circuit, and improve the consistency of battery pack, native system connects the battery management module unit of multiple node by CAN, has message transmission rate high, real-time, the advantages such as centralized management.

Description

Based on the batteries management system of CAN
Technical field
The utility model relates to field of battery management, particularly relates to a kind of batteries management system based on CAN.
Background technology
Electricity storage technology can realize the use needing level and smooth load, peak load shifting, effectively balanced electric energy effectively; thus improve the service efficiency of electric energy; it is the important technology alleviating current energy crisis and environmental pollution; wherein battery energy storage more and more receives the concern of people with himself exclusive feature; battery energy storage system due to floor space little; construction speed is fast, obtains development at full speed in recent years.In the discharge and recharge use procedure of battery, due to the change of the physical characteristic of battery, such as polarizing voltage, internal resistance of cell change, the consistency of each battery cell reduces, and by causing the deterioration of battery performance even to damage, greatly reduces the useful life of battery pack.
Utility model content
For the technical problem existed in background technology, the utility model object is to provide a kind of batteries management system based on CAN, can manage for lithium battery and lead-acid battery energy storage, and the parameter of battery is monitored in real time, the temperature inspection and control of battery cell, battery charge state (SOC) calculates in real time and shows in real time and report to the police, active equalization between each battery cell group can be carried out, realize the harmless transfer of the energy content of battery, improve battery with two side terminals, extend the useful life of battery.
The technical solution of the utility model is achieved in that the batteries management system based on CAN, mainly comprise the battery pack be made up of N number of power brick, each power brick includes at least one battery cell, also comprise N number of battery management module, each battery management module connects a power brick respectively; Also comprise an ARM controller, described ARM controller is by CAN and each battery management module communication; Wherein, described battery management module mainly comprises single-chip microcomputer, the voltage acquisition module be connected with single-chip microcomputer input, current acquisition module, temperature collect module; The equalizing circuit be connected is exported, thermal-shutdown circuit, alarm module with single-chip microcomputer, and the debug serial port of both-way communication and CAN communication unit.
As preferably, N is more than or equal to the integer that 1 is less than or equal to 30.
As preferably, described CAN is in series with terminal resistance.
As preferably, described terminal resistance is 120 Ω.
As preferably, described voltage detection module comprises battery detecting chip LTC6804, and described battery detecting chip LTC6804 is by SPI interface communication single-chip microcomputer.
As preferably, described current detection module measures the discharge and recharge total current of battery pack by external Hall current sensor.
As preferably, described temperature detecting module is by the temperature of external PT1000 temperature sensor measurement battery pack.
As preferably, described alarm module is by the glittering display alarm information of LED.
As preferably, CAN communication interface adopts hyper tape isolation communication interface circuit to complete the communication with ARM controller.
The utility model is compared with prior art: native system can complete the terminal voltage of each battery cell of battery pack, charging and discharging currents, the temperature parameter acquisition and display of battery cell, can calculate the state-of-charge (SOC) of each battery cell in real time.In the use procedure of battery; due to the change of inside battery parameter; the state-of-charge of battery cell (SOC) is caused to occur inconsistent; native system completes the real time correction of the state-of-charge (SOC) of battery cell by equalizing circuit, improve the consistency of battery pack, native system connects the battery management module unit of multiple node by CAN; there is message transmission rate high; real-time, the advantages such as centralized management, can effective Management and Protection battery pack.
Accompanying drawing explanation
Fig. 1 is battery management system system schematic;
Fig. 2 is battery management module schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in accompanying drawing 1 to 2, batteries management system based on CAN described in the utility model, mainly comprise the battery pack be made up of N number of power brick, each power brick includes at least one battery cell (the present embodiment is the battery cell of 12 series connection), also comprise N number of battery management module, each battery management module connects a power brick respectively, and wherein N is more than or equal to the integer that 1 is less than or equal to 30; Also comprise an ARM controller, described ARM controller is by CAN and each battery management module communication.In order to realize being selected by jumper terminal in battery management module, to complete the coupling of impedance, through-put power is made to reach maximum, ensure CAN communication data transmitting, described CAN is in series with terminal resistance, described terminal resistance is 120 Ω, and adopts the Shielded Twisted Pair of band isolation as CAN communication transmission cable.
Described battery management module is for gathering the battery charge state (SOC) of each battery cell in battery pack, voltage, electric current, temperature, and determine the battery cell that need carry out electric quantity balancing according to the battery charge state (SOC) of battery cell, and control the high battery cell of the battery monomer group interior electric quantity balancing low to electricity.Described battery management module mainly comprises single-chip microcomputer, the electric current and voltage acquisition module be connected with single-chip microcomputer input, temperature collect module; The equalizing circuit be connected is exported, thermal-shutdown circuit, alarm module with single-chip microcomputer, and the debug serial port of both-way communication and CAN communication unit.
By single-chip microcomputer SPI interface communication, this interface carries out communication by isolating chip and battery detecting chip LTC6804, completes the collection of cell voltage, carries out the monitoring that goes offline simultaneously, and information is transferred to ARM controller by CAN carries out showing and control.Described battery management module adopts high-precision Hall current sensor to carry out the discharge and recharge total current monitoring of battery, and information transfers to ARM controller by CAN.Temperature detection carries out battery temperature measurement by high-precision PT1000 temperature sensor, when battery temperature is too high, opens fan carry out cooling process by Single-chip Controlling.Carried out the display of warning message by Single-chip Controlling LED, and warning message is transferred to ARM controller by CAN.Active equalization circuit adopts two-way reverse exciting topological circuit to complete single battery and 12 and goes here and there whole bunch of bidirectional equalization, and switching frequency is 150KHz, and native system adopts fixing pwm pulse width activation switch MOSFET, and pulse duration can adjust, to adjust euqalizing current.For realizing field adjustable, can described debug serial port be passed through, carry out display and the state modulator of battery information.CAN communication interface adopts hyper tape isolation communication interface circuit to complete the communication with ARM controller, and transfer of data has high reliability, and communications protocol adopts CAN2.0B to have data check, ensures the reliability of data.
The utility model gathers the battery charge state (SOC) of power brick by battery management module, voltage, electric current, temperature etc., and by CAN communication and each power brick of control, and show in real time, the calculating of the battery charge state (SOC) of each battery cell is completed by ARM controller, after calculating completes, send Balance route order, by each battery cell voltage of CAN real-time Transmission, electric current, the information such as temperature and Balance route order, Balance route is completed by battery management module, ARM controller shows the information of each battery cell in real time.
Technical scheme described by the utility model has following characteristics:
1, the terminal voltage adopting high accuracy battery managing chip LTC6804 to realize battery cell is measured, and error is 1mV, and adopt high-precision hall device to gather the charging and discharging currents of battery, precision is accurate.
2, active equalization circuit can complete the active equalization of battery pack, can pre-set the euqalizing current value of battery, and euqalizing current scope is 2A-4.5A.
3, adopt high accuracy PT1000 temperature sensor to carry out temperature acquisition, temperature acquisition error is ± 1 DEG C.When battery temperature is higher than set point, by thermal-shutdown circuit, battery is dispelled the heat, realize the accurate control of battery temperature, make battery operated in its optimum state.
4, under-voltage overvoltage protection and the alarm of battery can be completed, when battery is in deficient overvoltage, by control relay switch cutoff battery, thus realize battery and effectively protect.
5, CAN communication adopts the CTM8251T transceiver with high_voltage isolation, bus protection function; enhance the transmission reliability of CAN; holding wire transmission adopts Shielded Twisted Pair, antijamming capability, and communications protocol adopts CAN2.0B bus protocol to carry out transfer of data.
6, native system is made up of multiple battery management module unit, and can connect nearly 30 modular units, each modular unit data communication is interconnected by CAN.
7, native system can carry out battery lead go offline detect with protection.
8, native system can carry out the online upgrading of Single Chip Microcomputer (SCM) program by CAN.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.

Claims (9)

1. based on the batteries management system of CAN, it is characterized in that: mainly comprise the battery pack be made up of N number of power brick, each power brick includes at least one battery cell, also comprises N number of battery management module, and each battery management module connects a power brick respectively; Also comprise an ARM controller, described ARM controller is by CAN and each battery management module communication; Wherein, described battery management module mainly comprises single-chip microcomputer, the voltage acquisition module be connected with single-chip microcomputer input, current acquisition module, temperature collect module; The equalizing circuit be connected is exported, thermal-shutdown circuit, alarm module with single-chip microcomputer, and the debug serial port of both-way communication and CAN communication unit.
2. the batteries management system based on CAN according to claim 1, is characterized in that: N is more than or equal to the integer that 1 is less than or equal to 30.
3. the batteries management system based on CAN according to claim 1, is characterized in that: described CAN is in series with terminal resistance.
4. the batteries management system based on CAN according to claim 3, is characterized in that: described terminal resistance is 120 Ω.
5. the batteries management system based on CAN according to claim 1, is characterized in that: described voltage detection module comprises battery detecting chip LTC6804, and described battery detecting chip LTC6804 is by SPI interface communication single-chip microcomputer.
6. the batteries management system based on CAN according to claim 1, is characterized in that: described current detection module measures the discharge and recharge total current of battery pack by external Hall current sensor.
7. the batteries management system based on CAN according to claim 1, is characterized in that: described temperature detecting module is by the temperature of external PT1000 temperature sensor measurement battery pack.
8. the batteries management system based on CAN according to claim 1, is characterized in that: described alarm module is by the glittering display alarm information of LED.
9. the batteries management system based on CAN according to claim 1, is characterized in that: described CAN communication interface adopts hyper tape isolation communication interface circuit to complete the communication with ARM controller.
CN201420812441.7U 2014-12-18 2014-12-18 Based on the batteries management system of CAN Expired - Fee Related CN204271704U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104967179A (en) * 2015-07-13 2015-10-07 沈阳航空航天大学 Electric airplane energy management system
CN105375503A (en) * 2015-09-02 2016-03-02 国网上海市电力公司 Energy storage in-situ monitoring system
CN105449717A (en) * 2016-01-11 2016-03-30 上海紫竹新兴产业技术研究院 Contrast-type solar power supply equipment
CN105449716A (en) * 2016-01-11 2016-03-30 上海紫竹新兴产业技术研究院 Battery management system for contrast-type solar power supply equipment
CN111976537A (en) * 2019-05-24 2020-11-24 北京车和家信息技术有限公司 Battery management circuit, battery management system, control method of battery management system and electric vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104967179A (en) * 2015-07-13 2015-10-07 沈阳航空航天大学 Electric airplane energy management system
CN104967179B (en) * 2015-07-13 2017-04-05 沈阳航空航天大学 Electric airplane EMS
CN105375503A (en) * 2015-09-02 2016-03-02 国网上海市电力公司 Energy storage in-situ monitoring system
CN105449717A (en) * 2016-01-11 2016-03-30 上海紫竹新兴产业技术研究院 Contrast-type solar power supply equipment
CN105449716A (en) * 2016-01-11 2016-03-30 上海紫竹新兴产业技术研究院 Battery management system for contrast-type solar power supply equipment
CN111976537A (en) * 2019-05-24 2020-11-24 北京车和家信息技术有限公司 Battery management circuit, battery management system, control method of battery management system and electric vehicle

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150415

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CF01 Termination of patent right due to non-payment of annual fee