CN205941678U - Power battery current detection device based on shunt - Google Patents
Power battery current detection device based on shunt Download PDFInfo
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Abstract
The utility model relates to a power battery current detection device based on shunt, the analog -to -digital conversion module, the communication module that with main control unit are connected is reached including the main control unit, analog -to -digital conversion module connects through filtering amplification and frequency modulation circuit module respectively and is used for gathering shunt temperature value's temperature acquisition module and the voltage acquisition module that is used for gathering the shunt magnitude of voltage: after changing, analog -to -digital conversion module inputs the main control unit to the analog signal of the temperature value's of the shunt gathered analog signal and magnitude of voltage, the analog -to -digital conversion module input was handled to the main control unit shunt voltage and current value signal calculate the shunt current value. The utility model discloses accessible software configuration parameter uses more in a flexible way, and the range of application is wider, the communication of optional multiple communication mode to satisfy various different application scenarios, measurement accuracy height, sexual valence relative altitude, the small installation of being convenient for do not need the user to intervene in the use, reduce the host computer burden.
Description
Technical field
This utility model belongs to current sensing means technical field and in particular to a kind of electrokinetic cell based on diverter is electric
Flow detection device.
Background technology
New-energy automobile quickly grows in recent years, for the traffic safety of support vehicles, the extreme list of electrokinetic cell system
Bulk voltage, electrokinetic cell stagnation pressure, the critical data such as electrokinetic cell size of current is must real-time monitoring.Such as electrokinetic cell
Total current is most important with SOC prediction for the running status of monitoring battery system.
Requirement for battery management system BMS system is also increasingly harsher, and current detecting is as must in BMS system
A few part, it is self-evident to the importance of BMS.One side current sensor needs the real-time current feedback of vehicle
To driver or technical staff, it is easy to grasp the running status of electric vehicle；On the other hand, the precision of current sensor is direct
It is related to the estimation precision of electric automobile SOC, exception in current sensor or precision is inadequate, it will lead to SOC estimation partially
Difference is larger, or current measurement is forbidden triggering vehicle software Preservation tactics to lead to cutoff high.
At present, widely use Hall-type current sensor in electric automobile industry as current monitoring device, existing on market
There are two kinds of Hall-type current sensors：Open loop Hall, closed loop Hall；Wherein open loop Hall price is relatively cheap, but certainty of measurement
Low, temperature influence is larger, and the measurement response time is not fast simultaneously, and bandwidth is narrow；Closed loop Hall is with respect to open loop Hall
For, certainty of measurement is high, but it is expensive.
Both generally existing problems with：1. volume is big, installs inconvenience, does not meet the need of the development of small size lightweight now
Ask；2. Hall element measures small current under the conditions of wide range and exists and makes small current collection inaccurate than larger error；3.
Hall element such that it does not normal measure, also easily causes the damage of sensor after there is magnetic saturation simultaneously；4. electricity
The complicated imitated output quantity easily disturbing Hall element of electrical automobile electromagnetic environment, thus affect the precision of current measurement.
Utility model content
The purpose of this utility model is to solve above-mentioned technical problem and provides a kind of electrokinetic cell based on diverter
Current sensing means.
For achieving the above object, this utility model adopts the following technical scheme that：
A kind of electrokinetic cell current sensing means based on diverter, including main control unit and with described main control unit even
The analog-to-digital conversion module that connects, communication module；Described analog-to-digital conversion module amplifies filtering and FM circuit mould by corresponding respectively
Block connects temperature collect module and voltage acquisition module：
Voltage acquisition module, for gathering the magnitude of voltage of diverter；
Temperature collect module, for reading the Temperature numerical of described diverter；
Analog-to-digital conversion module, for the Temperature numerical to the diverter that described temperature collect module gathers analogue signal with
And voltage acquisition module collection the magnitude of voltage of diverter analogue signal be AD converted after input to described main control unit；
Main control unit, is communicated with battery management system by described communication module, for processing described analog-to-digital conversion module
The voltage of diverter of input and current value digital signal calculate the current value of diverter and export battery management system.
Described diverter is the shunt resistance of certain resistance, is in parallel with the power supply circuits of electrokinetic cell and is connected.
Described voltage acquisition module is voltmeter, and described temperature collect module is temperature acquisition sensor.
Described main control unit is a single-chip microprocessor MCU.
Described communication module is communication interface.
Described communication interface is wired communication interface, connects battery management system using LIN, CAN or UART mode.
The electrokinetic cell current sensing means based on diverter for this utility model, due to adopting diverter, by master control list
Unit processes the temperature of diverter of collection and voltage value obtains current value, with respect to Hall element, can independently accomplish to survey
The features such as accuracy of measurement is high, cost performance is high, small volume is easily installed.
And this utility model can pass through software configuration parameter, using more flexible, range of application is wider；Can select many
Plant communication mode communication, to meet various different application scenarios；There is self-detection mechanism it is possible to configure multiple alarm modes,
More intelligent, safer；Module is full intellectualized, does not need user intervention in use, reduces host computer burden.
Brief description
The structural representation of the electrokinetic cell current sensing means based on diverter that Fig. 1 provides for this utility model embodiment
Figure:
The workflow of the electrokinetic cell current sensing means based on diverter that Fig. 2 provides for this utility model embodiment
Figure.
Specific embodiment
Below, in conjunction with example, substantive distinguishing features of the present utility model and advantage are further described, but this practicality is new
Type is not limited to listed embodiment.
Shown in Figure 1, a kind of electrokinetic cell current sensing means based on diverter, including main control unit and with institute
State analog-to-digital conversion module, the communication module of main control unit connection；Described analog-to-digital conversion module passes through corresponding amplification respectively and filters
And FM circuit module connects temperature collect module and voltage acquisition module：
Voltage acquisition module, for gathering the magnitude of voltage of diverter；
Temperature collect module, for reading the Temperature numerical of described diverter；
Analog-to-digital conversion module, for the Temperature numerical to the diverter that described temperature collect module gathers analogue signal with
And voltage acquisition module collection the magnitude of voltage of diverter analogue signal be AD converted after input to described main control unit；
Main control unit, is communicated with battery management system by described communication module, for processing described analog-to-digital conversion module
The voltage of diverter of input and current value digital signal calculate the current value of diverter and export battery management system.
Described diverter is the shunt resistance of certain resistance, is in parallel with the power supply circuits of electrokinetic cell and is connected.
Described voltage acquisition module is the voltage collector of voltmeter or existing battery, and described temperature collect module is temperature
Collection sensor, can be such as PT100 Temperature sampler or existing available resistance temperature gathers sensor.
Described main control unit is a single-chip microprocessor MCU, and described communication module is communication interface, is connected with main control unit；
Preferably, described communication interface is wired communication interface, can be to connect electricity using local interconnect network LIN, CAN, UART mode
Pond management system carries out communicating and realizes the transmission of data.
Described main control unit can carry out System self-test and relevant configuration etc., temperature collect module is responsible for the temperature of diverter
The reading of degrees of data, analog-to-digital conversion module main task are that processing data carries out AD data conversion, communication module passes through LIN/
CAN/UART etc. completes the communication between main control unit and battery management system.
This utility model is due to using above technology, thus the detection to the electric current of electrokinetic cell does not adopt price to hold high completely
The larger Hall element of expensive and volume.Only by using the shunt resistance that a resistance is certain, during measurement, detect first
The magnitude of voltage (now magnitude of voltage be analogue signal) of shunt resistance, is amplified defeated after filtering and frequency modulation to magnitude of voltage analogue signal
Enter analog-to-digital conversion module, analog-to-digital conversion module transmits to main control unit after being converted to magnitude of voltage digital signal.On the other hand, shunt
The temperature that temperature collect module detects shunt resistance is provided with resistance.The temperature value of temperature collect module collection is initially simulation
Signal, same temperature value signal is amplified with filtering and frequency modulation after input analog-to-digital conversion module, analog-to-digital conversion module turns
Transmit to main control unit after being changed to temperature value digital signal.Main control unit can be using prior art according to temperature resistance curve (TCR
Curve) real-time calibration is carried out to the resistance of shunt resistance.Finally according to current formula I=U/R by main control unit by magnitude of voltage number
Word signal is worth to real-time current value divided by the resistance after correction, and real-time current value is sent to battery management system by communication module
System, thus realize the real-time detection to electric current.
With reference to Fig. 2, specific work process of the present utility model is described in detail as follows：
1. first, carry out system electrification；
2. carry out System self-test, including system itself initialization, system outages detection, EEPROM data check；
3. system operation relevant configuration, such as AD configuration, reading EEPROM correction data, User Defined configuration；
4. read diverter temperature data；
5. judge that AD interrupts whether arriving, if interrupting to the reading data carrying out normal step；If interrupting not arriving, continue etc.
Treat, in user-defined regulation duration, AD interrupts reaching, and triggering AD monitoring module enters normal step, in regulation duration AD
Disconnected arrival sends false command to correlation acquisition information module, carries out system reboot；
6. read data；
7. data filtering/process (if invalid data then re-reads data)；
8. pair valid data carry out Data correction；
9. application layer judges, exceedes threshold value generation warning formation alert data and passes to collection information mould by data communication
Block, data normally then carries out normal data communication；
10. data is sent using a kind of mode of LIN, CAN, UART by communication module interface.
This utility model is due to being controlled gathering and processing of diverter temperature and magnitude of voltage using main control unit, defeated
Go out the current value of diverter, to realize the measurement of the electric current to electrokinetic cell, such that it is able to join using software by main control unit
Put parameter, using more flexible, range of application is wider；Communication can be selected to communicate, to meet various different answering
Use occasion；There is self-detection mechanism, and can configure multiple alarm modes, more intelligently, safer；Module is full intellectualized, makes
With in do not need user intervention, reduce the burden of host computer.
The above is only preferred implementation of the present utility model it is noted that common skill for the art
For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (6)
1. a kind of electrokinetic cell current sensing means based on diverter is it is characterised in that include：
Main control unit and the analog-to-digital conversion module being connected with described main control unit, communication module；Described analog-to-digital conversion module divides
Do not amplify filtering and FM circuit module connection temperature collect module and voltage acquisition module by corresponding：
Voltage acquisition module, for gathering the magnitude of voltage of diverter；
Temperature collect module, for reading the Temperature numerical of described diverter；
Analog-to-digital conversion module, the analogue signal for the Temperature numerical to the diverter that described temperature collect module gathers and electricity
The analogue signal of the magnitude of voltage of diverter of pressure acquisition module collection inputs to described main control unit after being AD converted；
Main control unit, is communicated with battery management system by described communication module, for processing described analog-to-digital conversion module input
The voltage of diverter and current value digital signal calculate the current value of diverter and export battery management system.
2. according to claim 1 the electrokinetic cell current sensing means based on diverter it is characterised in that described diverter
For the shunt resistance of certain resistance, it is in parallel with the power supply circuits of electrokinetic cell and is connected.
3. according to claim 2 the electrokinetic cell current sensing means based on diverter it is characterised in that described voltage is adopted
Integrate module as voltmeter, described temperature collect module is temperature acquisition sensor.
4. according to any one of claim 1-3 the electrokinetic cell current sensing means based on diverter it is characterised in that institute
Stating main control unit is a single-chip microprocessor MCU.
5. according to claim 4 the electrokinetic cell current sensing means based on diverter it is characterised in that described communication mould
Block is communication interface.
6. according to claim 5 the electrokinetic cell current sensing means based on diverter it is characterised in that described communication connects
Mouth is wired communication interface, connects battery management system using LIN, CAN or UART mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620482992.0U CN205941678U (en) | 2016-05-24 | 2016-05-24 | Power battery current detection device based on shunt |
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| CN201620482992.0U CN205941678U (en) | 2016-05-24 | 2016-05-24 | Power battery current detection device based on shunt |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589291A (en) * | 2016-07-06 | 2018-01-16 | 深圳市沃特玛电池有限公司 | Electric automobile current detecting system and method |
| CN107677883A (en) * | 2017-10-20 | 2018-02-09 | 厦门马恒达汽车零部件有限公司 | A kind of current sensor adjustment in accuracy device and method |
| CN107861069A (en) * | 2017-10-23 | 2018-03-30 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
| CN109591601A (en) * | 2018-12-19 | 2019-04-09 | 安徽江淮汽车集团股份有限公司 | A kind of automobile-used splitter circuit of self diagnosis |
| CN112067888A (en) * | 2020-09-09 | 2020-12-11 | 东莞新能安科技有限公司 | Battery, current acquisition device, calibration method, management system and electronic device thereof |
| CN112882415A (en) * | 2021-01-13 | 2021-06-01 | 深圳鹏申科技有限公司 | BMS-based AFE data acquisition automatic scheduling method, storage device and mobile terminal |
| CN113447877A (en) * | 2021-06-16 | 2021-09-28 | 合肥国轩高科动力能源有限公司 | System and method for calibrating upper computer of current measuring shunt |
| CN113640567A (en) * | 2020-05-11 | 2021-11-12 | 上海汽车集团股份有限公司 | Current detection device and battery management system |
| CN116735929A (en) * | 2023-06-12 | 2023-09-12 | 深圳市开步电子有限公司 | Shunt, new energy automobile and energy storage equipment thereof |
-
2016
- 2016-05-24 CN CN201620482992.0U patent/CN205941678U/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589291A (en) * | 2016-07-06 | 2018-01-16 | 深圳市沃特玛电池有限公司 | Electric automobile current detecting system and method |
| CN107677883A (en) * | 2017-10-20 | 2018-02-09 | 厦门马恒达汽车零部件有限公司 | A kind of current sensor adjustment in accuracy device and method |
| CN107861069A (en) * | 2017-10-23 | 2018-03-30 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
| CN111880104B (en) * | 2017-10-23 | 2022-05-13 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
| CN107861069B (en) * | 2017-10-23 | 2020-07-14 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
| CN111880104A (en) * | 2017-10-23 | 2020-11-03 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
| CN109591601B (en) * | 2018-12-19 | 2020-11-17 | 安徽江淮汽车集团股份有限公司 | Self-diagnosis current divider circuit for vehicle |
| CN109591601A (en) * | 2018-12-19 | 2019-04-09 | 安徽江淮汽车集团股份有限公司 | A kind of automobile-used splitter circuit of self diagnosis |
| CN113640567A (en) * | 2020-05-11 | 2021-11-12 | 上海汽车集团股份有限公司 | Current detection device and battery management system |
| CN112067888A (en) * | 2020-09-09 | 2020-12-11 | 东莞新能安科技有限公司 | Battery, current acquisition device, calibration method, management system and electronic device thereof |
| CN112067888B (en) * | 2020-09-09 | 2023-10-17 | 东莞新能安科技有限公司 | Battery, current acquisition device, calibration method, management system and electronic device thereof |
| CN112882415A (en) * | 2021-01-13 | 2021-06-01 | 深圳鹏申科技有限公司 | BMS-based AFE data acquisition automatic scheduling method, storage device and mobile terminal |
| CN113447877A (en) * | 2021-06-16 | 2021-09-28 | 合肥国轩高科动力能源有限公司 | System and method for calibrating upper computer of current measuring shunt |
| CN116735929A (en) * | 2023-06-12 | 2023-09-12 | 深圳市开步电子有限公司 | Shunt, new energy automobile and energy storage equipment thereof |
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