CN107179511A - The circuit structure and method of a kind of charging and discharging currents detection - Google Patents
The circuit structure and method of a kind of charging and discharging currents detection Download PDFInfo
- Publication number
- CN107179511A CN107179511A CN201710457514.3A CN201710457514A CN107179511A CN 107179511 A CN107179511 A CN 107179511A CN 201710457514 A CN201710457514 A CN 201710457514A CN 107179511 A CN107179511 A CN 107179511A
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- circuit
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- discharging currents
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- 238000007599 discharging Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 12
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of circuit structure of charging and discharging currents detection, including：Closed Loop Hall, potential circuit and discharge circuit；The Closed Loop Hall is sleeved in the battery bag positive bus of cell management system of electric automobile, for sensing the electric current in the bus, and output voltage signal；The potential circuit is connected to the input of the discharge circuit, and voltage Vref is praised for providing；Voltage signal and the voltage Vref that praises for the Closed Loop Hall to be exported are overlapped, so as to export a positive voltage signal to the Chip Microcomputer A/D mouthful.The positive/negative voltage signal that detection circuit realiration Chip Microcomputer A/D mouth is exported by one-level discharge circuit to Closed Loop Hall is acquired, so as to make accurate judgement to the sense of current and size flowed through in battery bag positive bus.
Description
Technical field
The invention belongs to technical field of automotive electronics, and in particular to a kind of circuit structure of charging and discharging currents detection and side
Method.
Background technology
The existing charging and discharging currents detection method applied in electric automobile BMS systems is in battery bag positive bus
The method that the charging and discharging currents flowed through are detected.This method is by covering an open loop in battery bag positive bus suddenly
That sensor, this open loop Hall sensor output positive voltage signal, after simple voltage division processing, connects to single-chip microcomputer
AD acquisition ports, then single-chip microcomputer be identified by the magnitude of voltage to this signal, come to flowing through in battery bag positive bus
Sense of current and size are judged.
Existing technology has selected the open loop Hall sensor for being output as positive voltage signal, is carried out not over discharge circuit
Signal is changed, and is so had and is affected by temperature greatly, precision is low, the shortcomings of reaction time is not fast enough.
The content of the invention
1st, the technical problem to be solved
To solve the drawbacks described above that prior art is present, the present invention provide a kind of detection of charging and discharging currents circuit structure and
Method, the positive/negative voltage signal exported by using the AD mouths of monolithic to Closed Loop Hall is acquired identification, so that real
Timely, accurate judgement is now made to the sense of current and size that are flowed through in battery bag positive bus.
2nd, technical scheme
The purpose of the present invention is mainly realized by following technical scheme.
A kind of circuit structure of charging and discharging currents detection, including：Closed Loop Hall, potential circuit and discharge circuit；
The Closed Loop Hall is sleeved in the battery bag positive bus of cell management system of electric automobile, for sensing the bus
On electric current, and output voltage signal；The potential circuit is connected to the input of the discharge circuit, and electricity is praised for providing
Press Vref；The discharge circuit is connected to Chip Microcomputer A/D mouthful, for the voltage signal that exports the Closed Loop Hall and
The voltage Vref that praises is overlapped, so as to export a positive voltage signal to the Chip Microcomputer A/D mouthful.
Further, the potential circuit provides described praise by the voltage reference source chip of high accuracy, Low Drift Temperature
Voltage Vref.
Further, the reference voltage of the Chip Microcomputer A/D mouthful by the voltage reference source chip of high accuracy, Low Drift Temperature come
There is provided.
A kind of charging and discharging currents detection method, the circuit structure detected by a kind of above-mentioned charging and discharging currents is electronic to detect
The direction of the charging and discharging currents flowed through in automobile batteries management system in battery bag positive bus and size；
Further, voltage threshold of the maximum output voltage control of the discharge circuit in Chip Microcomputer A/D mouthful signal acquisition
It is interior.
3rd, beneficial effect：
Compared with prior art, a kind of circuit structure of charging and discharging currents of the invention detection and the beneficial effect of method exist
In：
Realize the positive/negative voltage signal that Chip Microcomputer A/D mouth is exported by one-level discharge circuit to Closed Loop Hall
It is acquired, so as to make accurate judgement to the sense of current and size flowed through in battery bag positive bus.In the method
Amplifier select rail-to-rail amplifier, praise the reference voltage of voltage Vref and Chip Microcomputer A/D mouthful from high accuracy, Low Drift Temperature
Voltage reference source chip is provided so that the accuracy of detection of whole detection method is high, and the response time is fast.
Brief description of the drawings
Fig. 1 is that the circuit structure and charging current of a kind of charging and discharging currents detection of the present invention flow to schematic diagram.
Fig. 2 is that the circuit structure and discharge current of a kind of charging and discharging currents detection of the present invention flow to schematic diagram.
Embodiment
Hereinafter, the specific embodiment of the present invention is described in detail refer to the attached drawing, detailed according to these
Description, one of ordinary skill in the art can implement the present invention it can be clearly understood that the present invention.Without prejudice to the principle of the invention
In the case of, the feature in each different embodiment can be combined to obtain new embodiment, or substitute some
Some of embodiment feature, acquisition is other preferred embodiment.
Fig. 1, Fig. 2 show according to the preferred embodiment of the present invention constitute a kind of charging and discharging currents detection circuit structure and
Method.As shown in figure 1, a kind of circuit structure of charging and discharging currents detection, including：Closed Loop Hall, potential circuit and fortune
Electric discharge road；The Closed Loop Hall is sleeved in the battery bag positive bus of cell management system of electric automobile, for feeling
Electric current that should be in bus, and output voltage signal；The potential circuit is connected to the input of the discharge circuit, for carrying
For praising voltage Vref；The discharge circuit is connected to Chip Microcomputer A/D mouthful, for the electricity for exporting the Closed Loop Hall
Pressure signal and the voltage Vref that praises are overlapped, so as to export a positive voltage signal to the Chip Microcomputer A/D mouthful.
The potential circuit praises voltage Vref described in being provided by the voltage reference source chip of high accuracy, Low Drift Temperature.
The reference voltage of the Chip Microcomputer A/D mouthful is provided by the voltage reference source chip of high accuracy, Low Drift Temperature.
A kind of charging and discharging currents detection method, the circuit structure detected by a kind of above-mentioned charging and discharging currents is electronic to detect
The direction of the charging and discharging currents flowed through in automobile batteries management system in battery bag positive bus and size；
Further, voltage threshold of the maximum output voltage control of the discharge circuit in Chip Microcomputer A/D mouthful signal acquisition
It is interior.
Operation principle：The charging and discharging currents detection method is mainly used in electric automobile BMS systems, for battery bag just
The method that the charging and discharging currents flowed through in the bus of pole are detected.This method is by covering one in battery bag positive bus
The Hall sensor of closed loop, senses to the electric current flowed through on this circuit：When charging current flows through Hall sensor, Hall
Sensor exports the signal of a positive voltage, when discharge current flows through Hall sensor, and Hall sensor exports a negative voltage
Signal, and this signal and the size of current that flows through are linearly proportional.Chip Microcomputer A/D mouthful will recognize to this voltage signal acquisition,
Because Chip Microcomputer A/D mouthful characteristic can only recognize positive voltage signal, so the output end in Hall sensor is electric by amplifier plus one-level
The positive-negative voltage conversion circuit of road composition, it is ensured that add one to praise voltage signal Vref in the input of discharge circuit and passed with Hall
The maximum negative voltage signal of sensor output by discharge circuit carry out it is superimposed after, discharge circuit output obtains positive voltage letter
Number Vout1, this ensures that the negative voltage signal for the gamut that Hall sensor is exported all is converted to positive voltage signal；Together
When ensure that this is praised the maximum positive voltage signal that voltage signal Vref exports with Hall sensor is carried out by discharge circuit
After superimposed, discharge circuit exports obtained positive voltage Vout2, and this Vout2 magnitude of voltage must be controlled in Chip Microcomputer A/D
In the voltage threshold of mouth signal acquisition.So it is achieved that single-chip microcomputer by AD mouthfuls of collections to flowing through in battery bag positive bus
Sense of current and size make timely, accurate judgement.
Although above by referring to specific embodiment, invention has been described, and one of ordinary skill in the art should
Work as understanding, in principle disclosed by the invention and scope, many modifications can be made for configuration disclosed by the invention and details.
Protection scope of the present invention is determined by appended claim, and claim is intended to technical characteristic in claim
Equivalent literal meaning or whole modifications for being included of scope.
Claims (5)
1. a kind of circuit structure of charging and discharging currents detection, it is characterised in that including：Closed Loop Hall, potential circuit and
Discharge circuit；The Closed Loop Hall is sleeved in the battery bag positive bus of cell management system of electric automobile, is used for
Sense the electric current in the bus, and output voltage signal；The potential circuit is connected to the input of the discharge circuit, is used for
Voltage Vref is praised in offer；The discharge circuit is connected to Chip Microcomputer A/D mouthful, for export the Closed Loop Hall
Voltage signal and the voltage Vref that praises are overlapped, so as to export a positive voltage signal to the Chip Microcomputer A/D mouthful.
2. the circuit structure of a kind of charging and discharging currents detection as claimed in claim 1, it is characterised in that the potential circuit leads to
Cross the voltage reference source chip of high-precision, Low Drift Temperature and described praise voltage Vref to provide.
3. a kind of circuit structure of charging and discharging currents detection as claimed in claim 2, it is characterised in that the Chip Microcomputer A/D mouthful
Reference voltage provided by the voltage reference source chip of high accuracy, Low Drift Temperature.
4. a kind of charging and discharging currents detection method, it is characterised in that including being filled by one kind as described in one of claim 1-3
The circuit structure of discharge current detection detects the charge and discharge flowed through in cell management system of electric automobile in battery bag positive bus
The method of electric sense of current and size.
5. a kind of charging and discharging currents detection method as claimed in claim 4, it is characterised in that the discharge circuit it is maximum defeated
Go out voltage control in the voltage threshold of Chip Microcomputer A/D mouthful signal acquisition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710457514.3A CN107179511A (en) | 2017-06-16 | 2017-06-16 | The circuit structure and method of a kind of charging and discharging currents detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710457514.3A CN107179511A (en) | 2017-06-16 | 2017-06-16 | The circuit structure and method of a kind of charging and discharging currents detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107179511A true CN107179511A (en) | 2017-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710457514.3A Pending CN107179511A (en) | 2017-06-16 | 2017-06-16 | The circuit structure and method of a kind of charging and discharging currents detection |
Country Status (1)
| Country | Link |
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| CN (1) | CN107179511A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983109A (en) * | 2018-08-10 | 2018-12-11 | 深圳芯智汇科技有限公司 | Electric current estimation chip, evaluation method and remaining capacity metering system for battery |
| CN109884377A (en) * | 2019-03-05 | 2019-06-14 | 常州索维尔电子科技有限公司 | The hall signal measuring device and method of detection range automatic adjustment |
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| JP2000294300A (en) * | 1999-04-02 | 2000-10-20 | Seiko Instruments Inc | Battery state monitoring circuit and battery device |
| CN102440774A (en) * | 2011-09-01 | 2012-05-09 | 东南大学 | Remote measurement module for related physiological information in rehabilitation training process |
| CN102854421A (en) * | 2012-09-11 | 2013-01-02 | 江苏旭源科技有限公司 | Quick judgment method for low voltage ride through of photovoltaic inverter |
| CN103323646A (en) * | 2013-06-04 | 2013-09-25 | 安徽安凯汽车股份有限公司 | Current sensor for electric vehicle and detecting method by means of same |
| CN203705533U (en) * | 2013-11-08 | 2014-07-09 | 合肥国轩高科动力能源股份公司 | Current detection circuit of Hall current sensor of electric automobile |
| CN203929989U (en) * | 2014-06-09 | 2014-11-05 | 桂林电子科技大学 | A kind of insulation testing device for electric automobile based on current monitoring |
| CN204666715U (en) * | 2015-03-31 | 2015-09-23 | 深圳宏泰电池科技有限公司 | A kind of electric automobile power battery current detecting system |
| WO2016047149A1 (en) * | 2014-09-26 | 2016-03-31 | 旭化成エレクトロニクス株式会社 | Hall electromotive force signal detection circuit and current sensor |
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2017
- 2017-06-16 CN CN201710457514.3A patent/CN107179511A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000294300A (en) * | 1999-04-02 | 2000-10-20 | Seiko Instruments Inc | Battery state monitoring circuit and battery device |
| CN102440774A (en) * | 2011-09-01 | 2012-05-09 | 东南大学 | Remote measurement module for related physiological information in rehabilitation training process |
| CN102854421A (en) * | 2012-09-11 | 2013-01-02 | 江苏旭源科技有限公司 | Quick judgment method for low voltage ride through of photovoltaic inverter |
| CN103323646A (en) * | 2013-06-04 | 2013-09-25 | 安徽安凯汽车股份有限公司 | Current sensor for electric vehicle and detecting method by means of same |
| CN203705533U (en) * | 2013-11-08 | 2014-07-09 | 合肥国轩高科动力能源股份公司 | Current detection circuit of Hall current sensor of electric automobile |
| CN203929989U (en) * | 2014-06-09 | 2014-11-05 | 桂林电子科技大学 | A kind of insulation testing device for electric automobile based on current monitoring |
| WO2016047149A1 (en) * | 2014-09-26 | 2016-03-31 | 旭化成エレクトロニクス株式会社 | Hall electromotive force signal detection circuit and current sensor |
| CN204666715U (en) * | 2015-03-31 | 2015-09-23 | 深圳宏泰电池科技有限公司 | A kind of electric automobile power battery current detecting system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983109A (en) * | 2018-08-10 | 2018-12-11 | 深圳芯智汇科技有限公司 | Electric current estimation chip, evaluation method and remaining capacity metering system for battery |
| CN109884377A (en) * | 2019-03-05 | 2019-06-14 | 常州索维尔电子科技有限公司 | The hall signal measuring device and method of detection range automatic adjustment |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170919 |