CN207366715U - A kind of battery SOC estimation device based on CAN bus - Google Patents

A kind of battery SOC estimation device based on CAN bus Download PDF

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Publication number
CN207366715U
CN207366715U CN201721510418.2U CN201721510418U CN207366715U CN 207366715 U CN207366715 U CN 207366715U CN 201721510418 U CN201721510418 U CN 201721510418U CN 207366715 U CN207366715 U CN 207366715U
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China
Prior art keywords
module
microprocessor
communication interface
internal resistance
bus
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Expired - Fee Related
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CN201721510418.2U
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Chinese (zh)
Inventor
杨光辉
钱祥忠
夏克刚
余懿衡
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Wenzhou University
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Wenzhou University
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Priority to CN201721510418.2U priority Critical patent/CN207366715U/en
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Abstract

A kind of battery SOC estimation device based on CAN bus, including voltage detection module, current detection module, temperature detecting module, internal resistance measurement module, microprocessor and LCD MODULE, further include CAN controller and the host computer with CAN communication interface, the LCD MODULE and microprocessor are respectively provided with CAN communication interface, the voltage detection module, current detection module, temperature detecting module and internal resistance measurement module are both provided with AD conversion module and CAN communication interface, and CAN controller is connected by CAN communication interface, the CAN controller connects microprocessor, the microprocessor connects host computer and the transmission of data is realized by CAN communication interface, the microprocessor connects LCD MODULE and the SOC value of battery is shown by LCD MODULE.The device is communicated using CAN bus, is had the following advantages:Long transmission distance, transmission rate is fast, can work in strong noise interference environment and error detecing capability is strong.

Description

A kind of battery SOC estimation device based on CAN bus
Technical field
It the utility model is related to electric automobile power battery management system field, it is more particularly to a kind of based on CAN bus Battery SOC estimates device.
Background technology
Power resources of the storage battery as electric automobile, its performance and service life directly affect the use of electric automobile, so The state of the parameters of battery is detected in real time, ensures the safe to use of electric automobile, extend the service life of electric automobile.
The state-of-charge of batteries of electric automobile group(SOC)The state of battery pack residual capacity is reflected, it can characterize electricity Electrical automobile can continue the mileage of traveling.But the charge and discharge process of battery is a complicated electrochemical reaction process, so electric The state-of-charge in pond measured directly cannot arrive, other batteries such as voltage, electric current, temperature and internal resistance that can only be by measuring battery Parameter estimate the state-of-charge of battery.
Notification number is that the Chinese patent of CN202177690U discloses a kind of electric automobile storage battery SOC estimation apparatus, is wrapped Include pressure detection module, current detection module, battery temperature detection module, environment temperature detection module respectively with DSP control devices Connection, internal resistance detection module are connected by ADS1110 with DSP control devices, and DSP control devices are connected by serial communication and microcomputer Connect, DSP control devices are connected with complete machine energy management system, display module, and display module is equipped with switching and shows manual switch. Wherein voltage detection module, current detection module, battery temperature detection module, environment temperature detection module, internal resistance detection module Voltage, electric current, battery temperature, environment temperature, the internal resistance of cell of storage battery are detected respectively, and subsequent data are passed to DSP control chips Handled, with reference to EKF and neural network algorithm, real-time estimation SOC, meanwhile, by display module, specific data are shown Show.But the device is had the disadvantage that using transfering data by serial communication:Transmission rate is low, and transmission range is short, antijamming capability Weak and data acquisition easily malfunctions.
Utility model content
The purpose of this utility model is to provide a kind of battery SOC estimation device based on CAN bus, which uses CAN Bus communicates, and has the following advantages:Long transmission distance, transmission rate is fast, can work and examine in strong noise interference environment Wrong ability is strong.
The above-mentioned technical purpose of the utility model technical scheme is that:One kind is based on CAN bus Battery SOC estimation device, it is including voltage detection module, current detection module, temperature detecting module, internal resistance measurement module, micro- Processor and LCD MODULE, further include CAN controller and the host computer with CAN communication interface, the LCD MODULE CAN communication interface, the voltage detection module, current detection module, temperature detecting module and internal resistance are respectively provided with microprocessor Measurement module is both provided with AD conversion module and CAN communication interface, and connects CAN controller by CAN communication interface, described CAN controller connects microprocessor, and the microprocessor connects host computer and the transmission of data is realized by CAN communication interface, The microprocessor connects LCD MODULE and the SOC value of battery is shown by LCD MODULE.
By using above-mentioned technical proposal, CAN bus long transmission distance, transmission rate is fast, and energy Quick Acquisition simultaneously transmits big Data are measured, keep the real-time of data update.CAN bus has error detection function, and detecting the module to make mistake can be same immediately Other all modules of Shi Tongzhi, are sending the module of message and are making mistake once detecting, can force to terminate current transmission.CAN Bus also has the function of Fault recovery, and the module for forcing to terminate to send constantly can repeatedly resend this message until successfully sending out Untill sending.Meanwhile CAN bus can carry out failure closing, CAN may determine that the type to make mistake is that data temporary transient in bus are wrong (such as external noise) or lasting error in data (such as unit internal fault, driver malfunction, broken string) by mistake.Thus work( Can, when duration data mistake occurs in bus, the module for causing this failure can be isolated away from bus.CAN bus with The program of microprocessor cooperates, and can realize more accurate data acquisition function, ensure the reliability of data.
It is further arranged to:The voltage detection module includes voltage sensor, and voltage sensor is connected to power battery Between the positive and negative anodes busbar of group, the output terminal of voltage sensor is connected with AD conversion module;The current detection module includes Current sensor, current sensor are serially connected with the positive electrode bus of power battery pack, the output terminal and AD conversion of current sensor Module is connected;The temperature detecting module includes temperature sensor, and temperature sensor is affixed on the surface of power battery pack, temperature The output terminal of sensor is connected with AD conversion module;The internal resistance measurement module includes internal resistance measurement instrument, internal resistance measurement instrument string It is connected on the positive and negative anodes busbar of power battery pack, the output terminal of internal resistance measurement instrument is connected with AD conversion module.
By using above-mentioned technical proposal, corresponding data can be collected, wherein being collected by voltage detection module dynamic The magnitude of voltage of power battery pack is simultaneously converted into corresponding digital signal by AD conversion module;Collected by current detection module dynamic The current value of power battery pack is simultaneously converted into corresponding digital signal by AD conversion module;Collected by temperature detecting module dynamic The temperature value of power battery pack is simultaneously converted into corresponding digital signal by AD conversion module;Collected by internal resistance measurement module dynamic The internal resistance value of power battery pack is simultaneously converted into corresponding digital signal by AD conversion module.
Brief description of the drawings
Fig. 1 is the structure diagram of embodiment.
In figure:1st, power battery pack;2nd, voltage detection module;3rd, current detection module;4th, temperature detecting module;5th, internal resistance Measurement module;6th, CAN controller;7th, microprocessor;8th, LCD MODULE;9th, host computer.
Embodiment
The utility model is described in further detail below in conjunction with attached drawing.
With reference to figure 1, a kind of battery SOC estimation device based on CAN bus, including voltage detection module 2, current detecting mould Block 3, temperature detecting module 4, internal resistance measurement module 5, microprocessor 7, LCD MODULE 8, CAN controller 6 and host computer 9 and CAN communication interface is both provided with, and is connected to by CAN communication interface in CAN bus, carries out data communication.Wherein voltage is examined Survey module 2, current detection module 3, temperature detecting module 4 and internal resistance measurement module 5 and connect CAN controller 6, CAN controls respectively Device 6 connects microprocessor 7, microprocessor connection host computer 9 and LCD MODULE 8.Voltage detection module 2, current detection module 3rd, temperature detecting module 4 and internal resistance measurement module 5 are both provided with AD conversion module.
Wherein:Voltage detection module 2 includes voltage sensor, and voltage sensor is connected to the positive and negative anodes of power battery pack 1 Between busbar, the output terminal of voltage sensor is connected with AD conversion module, and AD conversion module can be by the magnitude of voltage detected Analog signal is converted into corresponding digital signal.
Current detection module 3 includes current sensor, and current sensor is serially connected with the positive electrode bus of power battery pack 1, The output terminal of current sensor is connected with AD conversion module, and AD conversion module can turn the analog signal of the current value detected Change corresponding digital signal into.Temperature detecting module 4 includes temperature sensor, and temperature sensor is affixed on the table of power battery pack 1 Face, the output terminal of temperature sensor are connected with AD conversion module, and AD conversion module can believe the simulation of the temperature value detected Number it is converted into corresponding digital signal.Internal resistance measurement module 5 includes internal resistance measurement instrument, and internal resistance measurement instrument is serially connected with power battery pack On 1 positive and negative anodes busbar, the output terminal of internal resistance measurement instrument is connected with AD conversion module, the electricity that AD conversion module will can detect The analog signal of resistance value, which is walked around, changes corresponding digital signal into.Digital signal by AD conversion can be passed by CAN communication interface CAN bus is transported to, and is realized and received by CAN bus by CAN controller 6.CAN controller 6 is led to again after receiving digital signal Cross CAN bus and be transmitted to microprocessor 7, microcontroller here preferably is selected from the microprocessor 7 with CAN controller 6, i.e. microprocessor Device 7 is internally provided with CAN controller 6, and the digital signal of AD conversion can be directly transferred to the CAN controls inside microprocessor 7 at this time In device 6 processed, it is not necessary to which external one independent 6 chip of CAN controller, can greatly simplify setting and the manufacturing cost of hardware.
After microprocessor 7 receives digital signal and handled, host computer 9 is transmitted to by CAN bus.Host computer 9 Trained neuralnetwork estimating module is provided with, the SOC value of battery can be obtained by accurately estimating.Due to battery State-of-charge cannot be measured directly, be merely able to estimate the state-of-charge of battery by measuring the other specification of battery, so sharp The state-of-charge of battery is estimated with neuralnetwork estimating module, it is particularly important that the selection of parameter.The wherein voltage of battery, electricity Stream, temperature and internal resistance and the state-of-charge correlation of battery are big, therefore gather above-mentioned data and can make neuralnetwork estimating module Estimation accuracy higher, while the neuralnetwork estimating module has and is applicable in any kind of battery and need not establish specific Battery model can accurately, in real time on-line checking battery SOC value the characteristics of.There are the host computer 9 data to preserve work( Can, user can draw out relational graph by data, more directly observe the service condition of power battery pack 1.Neutral net is estimated Calculate module and estimate and microprocessor 7 is sent data to by CAN bus after SOC value, microprocessor 7 connects LCD MODULE 8 and LCD MODULE 8 is sent data to by CAN bus, LCD MODULE 8 can be shown by the liquid crystal display in it The SOC value of power battery pack 1 is shown, moreover it is possible to temperature, electric current, voltage and the internal resistance value of power battery pack 1 are shown, for user Solve the behaviour in service of electric automobile power battery and the course continuation mileage of power battery.When power battery overcharges, overdischarge, Power battery surface temperature excessively high failure when, LCD MODULE 8 can show the abnormality of battery to remind user to stop Check or repair.
This specific embodiment is only explanation to the utility model, it is not the limitation to the utility model, ability Field technique personnel as needed can make the present embodiment the modification of no creative contribution after this specification is read, but As long as all protected in the right of the utility model be subject to Patent Law.

Claims (2)

1. a kind of battery SOC estimation device based on CAN bus, including voltage detection module (2), current detection module (3), temperature Spend detection module (4), internal resistance measurement module (5), microprocessor (7) and LCD MODULE (8), it is characterised in that:Further include CAN controller (6) and the host computer (9) with CAN communication interface, the LCD MODULE (8) and microprocessor (7) are respectively provided with CAN communication interface, the voltage detection module (2), current detection module (3), temperature detecting module (4) and internal resistance measurement module (5) AD conversion module and CAN communication interface are both provided with, and CAN controller (6), the CAN are connected by CAN communication interface Controller (6) connection microprocessor (7), microprocessor (7) the connection host computer (9) simultaneously realize number by CAN communication interface According to transmission, the microprocessor (7) connection LCD MODULE (8) simultaneously passes through the SOC that LCD MODULE (8) shows battery Value.
2. the battery SOC estimation device according to claim 1 based on CAN bus, it is characterised in that:The voltage detecting Module (2) includes voltage sensor, and voltage sensor is connected between the positive and negative anodes busbar of power battery pack (1), voltage sensor The output terminal of device is connected with AD conversion module;
The current detection module (3) includes current sensor, and current sensor is serially connected with the positive electrode bus of power battery pack (1) On, the output terminal of current sensor is connected with AD conversion module;
The temperature detecting module (4) includes temperature sensor, and temperature sensor is affixed on the surface of power battery pack (1), temperature The output terminal of sensor is connected with AD conversion module;
The internal resistance measurement module (5) includes internal resistance measurement instrument, and the positive and negative anodes that internal resistance measurement instrument is serially connected with power battery pack (1) are female On line, the output terminal of internal resistance measurement instrument is connected with AD conversion module.
CN201721510418.2U 2017-11-14 2017-11-14 A kind of battery SOC estimation device based on CAN bus Expired - Fee Related CN207366715U (en)

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CN201721510418.2U CN207366715U (en) 2017-11-14 2017-11-14 A kind of battery SOC estimation device based on CAN bus

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Application Number Priority Date Filing Date Title
CN201721510418.2U CN207366715U (en) 2017-11-14 2017-11-14 A kind of battery SOC estimation device based on CAN bus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507607A (en) * 2018-10-29 2019-03-22 国家电网有限公司 Portable storage battery group voltage acquisition instrument
CN111196180A (en) * 2018-11-16 2020-05-26 宝沃汽车(中国)有限公司 Vehicle control unit, vehicle and remaining driving range display method and device thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507607A (en) * 2018-10-29 2019-03-22 国家电网有限公司 Portable storage battery group voltage acquisition instrument
CN111196180A (en) * 2018-11-16 2020-05-26 宝沃汽车(中国)有限公司 Vehicle control unit, vehicle and remaining driving range display method and device thereof

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

Granted publication date: 20180515

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