CN204196724U - A kind of principal and subordinate's monolithic cell management system - Google Patents
A kind of principal and subordinate's monolithic cell management system Download PDFInfo
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- CN204196724U CN204196724U CN201420637350.4U CN201420637350U CN204196724U CN 204196724 U CN204196724 U CN 204196724U CN 201420637350 U CN201420637350 U CN 201420637350U CN 204196724 U CN204196724 U CN 204196724U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model discloses a kind of principal and subordinate's monolithic cell management system, comprise processing unit, bus transfer unit, current signal transfer unit, data detecting unit, power supply unit, and battery pack, described battery pack is that processing unit is powered by power supply unit, described data detecting unit is connected to battery pack, and the battery pack data detected are sent to processing unit, described processing unit is by bus transfer unit and use electric current to be connected with instrumentation as the current signal transfer unit of signal transmission and then transmit to instrumentation the battery pack data that data detecting unit gathers.Compared with prior art, collection and the control of battery can be completed by same control module the utility model, do not need master-slave architecture system.This integral type framework is relatively simple, multiple functional, can reduce costs and can be good at realizing the control and protection of battery.And when abnormal or inefficacy appear in bus transfer unit, use current signal signal transmission means as a supplement, the complete of data-signal can be ensured, make signal keep higher transmission quality.
Description
Technical field
The utility model relates to power driven system field, particularly a kind of principal and subordinate's monolithic cell management system.
Background technology
In electronlmobil application, power battery pack consists of connection in series-parallel hundreds and thousands of cells usually.Because battery strings number is more, battery management system adopts master-slave architecture system usually: from the collection of machine monomeric charge data; Main frame is responsible for analysis and the Systematical control of data.A main frame is with multiple from machine usually, relevant with the string number of battery pack from the quantity of machine.But, in the few application scenario (field vehicle, postal car etc.) of some battery strings numbers, only has one case battery and to the strict vehicle of battery management system dimensional characteristic, collection and the control of battery can be completed by same control module, do not need master-slave architecture system.
And in application process, may because body vibrations or other reasons between battery management system and external device, cause battery management system and external device Signal transmissions instability, on the other hand, because the signal of transmission is voltage signal, signal transmission will be subject to the interference of noise and cause signal impure, and the resistance of transmission line can produce loss in voltage simultaneously, like this, auto meter can because above-mentioned interference causes signal to produce error; And the instrument amplifier equipment of vehicle often needs different operating voltages, and power equipment supply not easily produces multiple operating voltage, causes design difficulty to strengthen.
Utility model content
In view of this, problem to be solved in the utility model is, provides one realize master-slave integrated and can reduce battery management system to instrument cubicle signal errors, ensures instrument signal battery management system accurately.
In order to solve the problem, the technical solution of the utility model is as follows:
A kind of principal and subordinate's monolithic cell management system, comprise processing unit, bus transfer unit, current signal transfer unit, data detecting unit, power supply unit and battery pack, described battery pack is that processing unit is powered by power supply unit, described data detecting unit is connected to battery pack, and the battery pack data detected are sent to processing unit, described processing unit is by bus transfer unit and use electric current to be connected with instrumentation as the current signal transfer unit of signal transmission and then transmit to instrumentation the battery pack data that data detecting unit gathers.
Preferably, described data detecting unit comprises temperature detecting module, current detection module, single battery voltage detection module, total voltage detection module, insulation monitoring module, power supply detection module.
Preferably, described current detection module, be equipped with isolated component between insulation monitoring module and processing unit.
Preferably, described current signal transfer unit comprises signal conversion chip and isolating chip U3, and described signal conversion chip U3 input end is connected with processing unit by isolating chip U1, U2.
Preferably, described bus transfer unit comprises RS-485 communication module and CAN communication module.
Preferably, described power supply unit comprises power transfer module and hardware watchdog module.
Preferably, also comprise for disconnecting battery-powered security protection unit when battery state is abnormal, described processing unit can control the break-make between battery pack and consumer by security protection unit.
Preferably, described security protection unit comprises relay and control module thereof and signal detection module.
Compared with prior art, collection and the control of battery can be completed by same control module the utility model, do not need master-slave architecture system.This integral type framework is relatively simple, with strong points, reduce volume, multiple functional, can reduce costs and can be good at realizing the control and protection of battery.And when abnormal or inefficacy appear in bus transfer unit, use hard signal signal transmission means as a supplement, the complete of data-signal can be ensured, make signal keep higher transmission quality.
Accompanying drawing explanation
Fig. 1 is the overall structure block diagram of battery management system embodiment described in the utility model.
Fig. 2 is the current signal transfer element circuit structural representation of battery management system embodiment described in the utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the overall structure block diagram of battery management system embodiment described in the utility model.Fig. 2 is the current signal transfer element circuit constructional drawing of battery management system embodiment described in the utility model.
As shown in Figure 1, this battery management system comprises processing unit, bus transfer unit, current signal transfer unit, data detecting unit, power supply unit and battery pack.
Wherein, battery pack is that processing unit is powered by power supply unit, here processing unit comprises a MCU for the treatment of each cell data, power supply unit comprises power transfer module and hardware watchdog module, the high-voltage large current of battery pack is changed into by bleeder circuit by this power transfer module can for the voltage of processing unit work and electric current, the signal that hardware watchdog module then sends by processing unit ensures the operation of processing unit, if processing unit occurs that MCU can reset by procedural mistake.Preferably, power supply unit is also provided with power supply detection module, and by isolation AD detection management system power supply power supply, judges storage battery power supply state, car load low-voltage power network.
Data detecting unit then comprises temperature detecting module, current detection module, single battery voltage detection module, total voltage detection module, insulation monitoring module and power supply detection module.The modules of this data detecting unit is connected to battery pack, in order to the battery pack detected data are sent to processing unit, so that processing unit is by after carrying out finishing analysis to its data, it is accurately estimated to state-of-charge (the State of Charge of power battery pack, i.e. SOC), i.e. battery dump energy, according to the electric current of sampling, voltage, time, the data such as temperature, carry out judgement and the analysis of SOC, ensure that SOC maintains in rational scope, prevent because overcharge or overdischarge are to the damage of battery, thus forecast that power vehicle battery also remains the state-of-charge of how many energy or battery at any time, finally export data to auto meter.
Wherein, the requirement of each detection module and function as follows:
Temperature detecting module: precision is ± 1% DEG C (-40 ~ 125 DEG C), the detection of temperature is mainly in order to prevent the too high initiation safety misadventure of batteries of electric automobile group temperature, and simultaneously the mode of operation of storage battery and its internal temperature and operating ambient temperature have very important relation.Usually in power brick, select several representational positions mounting temperature sensor to carry out the measurement of temperature, and realize heating and radiating management.
Current detection module: precision is < ± 1%(± 300A), electric current, not only as judging that the foundation of overdischarge or overcurrent appears in battery, is also the Main Basis estimating battery SOC according to the coulomb metering of electric current, time.
Insulation monitoring module: Insulation monitoring: precision is <15%(2k Ω/V ~ 0 Ω/V), the electric leakage degree of current power battery can be accurately measured, stopped because insulation resistance detects the potential safety hazard brought of inaccuracy.
Bus transfer unit comprises RS-485 communication module and CAN communication module.RS-485 communication module and CAN communication module are all connected with external device, preferably, RS-485 uses MODBUS agreement to carry out communication, adopts the MAX485 chip of Maxim company, under the zero load or fully laden of actuator forbidding, the supply current of absorption is between 120 μ A to 500 μ A.Under all devices are all operated in 5V single supply.Actuator has short circuit current restriction, and by Thermal shutdown circuit, actuator output can be set to high-impedance state.Receptor input has fail safe characteristic, when input pull-down, can guarantee that logic high exports.Have higher obstacle overcome ability, simply efficiently, application is ripe.
As shown in Figure 2, for the electrical block diagram of current signal transfer unit, U3 is signal conversion chip, use AD5410 as signal conversion chip in the present embodiment, voltage signal can be converted to programmable current source by AD5410 to export, isolating chip U1 is provided with between the FAULT pin of AD5410 and MCU, LATCH, SCLK, SDIN, SDO tetra-are provided with isolating chip U2 between pin and MCU, the signal of MCU can be inputted more exactly AD5410 row relax of going forward side by side convert programmable current source to by the isolation of the signal of isolating chip.The mouth of AD5410 connects external device, as current source for external device provides MCU signal.Current signal transfer unit adopts electric current to carry out signal transmission, because electric current is insensitive to noise, can ensure the transmission quality of signal.Current signal transfer unit uses 4mA to represent zero-signal, represents the full scale of signal with 20mA, and is used for the warning of various fault lower than 4mA higher than the signal of 20mA.Current signal transfer unit is used for playing standby transport channel when bus transfer breaks down, because the signal of RS485 or CAN transmission is voltage signal, signal transmission will be subject to the interference of noise and impure, the resistance of transmission line also can produce loss in voltage, and so the signal of receiving end will produce error.And current signal transfer unit adopts electric current to carry out signal transmission, because electric current is insensitive to noise, the transmission quality of signal can be ensured.When MCU detects bus transfer unit and peripheral device communication exception or disconnects; communication automatically switches to current signal transfer unit and continues to transmit the instrumented data signal that battery management system exports; like this; just still can transmit corresponding data to processing unit normal communication in particular cases guarantee instrument or other equipment of bus transfer element failure or exception; as system communication Safety Redundancy, improve system reliability.
Preferably, this battery management system also comprises security protection unit, security protection unit is connected to processing unit, by relay and control module, signal detection module is formed, processing unit processes after obtaining the battery pack data detected by data detecting unit, when these data occur abnormal, signal detection module can detect the signal of data exception from processing unit, then control relay and control module make action, disconnect battery pack, and this abnormal information also can output in external display device by bus transfer unit by processing unit simultaneously, driver.
Meanwhile, preferred battery pack is also provided with balance module, the maximum 500mA of balance module active equalization electric current, the maximum 100mA of passive euqalizing current.In process of charging, by adjustment single battery charging current mode, in guarantee system, the battery terminal voltage of all batteries is carved with good conformability at each time.
In the utility model, the not concrete functional module introduced all can adopt functional module ripe in prior art, is not repeated herein.
Above-described embodiment is only preferably implementation of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these apparent replacement forms all belong to protection domain of the present utility model.
Claims (8)
1. principal and subordinate's monolithic cell management system, it is characterized in that: comprise processing unit, bus transfer unit, current signal transfer unit, data detecting unit, power supply unit, and battery pack, described battery pack is that processing unit is powered by power supply unit, described data detecting unit is connected to battery pack, and the battery pack data detected are sent to processing unit, described processing unit is by bus transfer unit and use electric current to be connected with instrumentation as the current signal transfer unit of signal transmission and then transmit to instrumentation the battery pack data that data detecting unit gathers.
2. principal and subordinate's monolithic cell management system according to claim 1, is characterized in that: described data detecting unit comprises temperature detecting module, current detection module, single battery voltage detection module, total voltage detection module, insulation monitoring module, power supply detection module.
3. principal and subordinate's monolithic cell management system according to claim 2, is characterized in that: described current detection module, be equipped with isolated component between insulation monitoring module and processing unit.
4. principal and subordinate's monolithic cell management system according to claim 1, it is characterized in that: described current signal transfer unit comprises signal conversion chip U3 and isolating chip U1, U2, described signal conversion chip U3 input end is connected with processing unit by isolating chip U1, U2.
5. principal and subordinate's monolithic cell management system according to claim 1, is characterized in that: described bus transfer unit comprises RS-485 communication module and CAN communication module.
6. principal and subordinate's monolithic cell management system according to claim 1, is characterized in that: described power supply unit comprises power transfer module and hardware watchdog module.
7. principal and subordinate's monolithic cell management system according to claim 1; it is characterized in that: also comprise for disconnecting battery-powered security protection unit when battery state is abnormal, described processing unit can control the break-make between battery pack and consumer by security protection unit.
8. principal and subordinate's monolithic cell management system according to claim 7, is characterized in that: described security protection unit comprises relay and control module thereof and signal detection module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420637350.4U CN204196724U (en) | 2014-10-30 | 2014-10-30 | A kind of principal and subordinate's monolithic cell management system |
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| CN201420637350.4U CN204196724U (en) | 2014-10-30 | 2014-10-30 | A kind of principal and subordinate's monolithic cell management system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406559A (en) * | 2015-12-30 | 2016-03-16 | 深圳天邦达科技有限公司 | Battery management system for low-speed electric vehicle |
| CN106564387A (en) * | 2016-10-14 | 2017-04-19 | 厦门金龙旅行车有限公司 | Active safety control method based on super capacitor monitoring management system |
| CN107797076A (en) * | 2017-12-12 | 2018-03-13 | 杭州电子科技大学 | A kind of automobile batteries Current Voltage detection device based on isolation coupling device |
| CN107994276A (en) * | 2017-10-27 | 2018-05-04 | 惠州市蓝微电子有限公司 | A kind of lithium ion battery package informatin retroactive method and device |
| CN109407012A (en) * | 2018-12-05 | 2019-03-01 | 上海翌芯电子科技有限公司 | A kind of battery management system and battery management method |
| CN111959344A (en) * | 2020-07-06 | 2020-11-20 | 北汽福田汽车股份有限公司 | Battery management system, control method and vehicle |
-
2014
- 2014-10-30 CN CN201420637350.4U patent/CN204196724U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406559A (en) * | 2015-12-30 | 2016-03-16 | 深圳天邦达科技有限公司 | Battery management system for low-speed electric vehicle |
| CN106564387A (en) * | 2016-10-14 | 2017-04-19 | 厦门金龙旅行车有限公司 | Active safety control method based on super capacitor monitoring management system |
| CN107994276A (en) * | 2017-10-27 | 2018-05-04 | 惠州市蓝微电子有限公司 | A kind of lithium ion battery package informatin retroactive method and device |
| CN107797076A (en) * | 2017-12-12 | 2018-03-13 | 杭州电子科技大学 | A kind of automobile batteries Current Voltage detection device based on isolation coupling device |
| CN109407012A (en) * | 2018-12-05 | 2019-03-01 | 上海翌芯电子科技有限公司 | A kind of battery management system and battery management method |
| CN111959344A (en) * | 2020-07-06 | 2020-11-20 | 北汽福田汽车股份有限公司 | Battery management system, control method and vehicle |
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