CN109239454A - A kind of direct current energy meter of automotive grade - Google Patents
A kind of direct current energy meter of automotive grade Download PDFInfo
- Publication number
- CN109239454A CN109239454A CN201811173415.3A CN201811173415A CN109239454A CN 109239454 A CN109239454 A CN 109239454A CN 201811173415 A CN201811173415 A CN 201811173415A CN 109239454 A CN109239454 A CN 109239454A
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- China
- Prior art keywords
- main control
- circuit
- control chip
- power supply
- voltage
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
Abstract
The invention discloses a kind of direct current energy meter of automotive grade, including main control chip, the main control chip is used for the data operation and communication process of electric energy；CAN control circuit, the CAN control circuit are connect with main control chip, for the main control chip and Full Vehicle System data interaction；High-voltage acquisition circuit, the high-voltage acquisition circuit are connect with main control chip, are used for collection voltages；Current collection circuit, the current collection circuit is connect with main control chip, for acquiring electric current；Isolated power supply circuit, input voltage generate non-interfering first voltage signal and second voltage signal after the isolated power supply circuit, and the first voltage signal is used to power to the main control chip, and second voltage signal is used to power to the CAN control circuit.It can measure electric energy, and strong antijamming capability is reliable and stable.
Description
Technical field
The present invention relates to electric energy measurement technical fields, and in particular to a kind of direct current energy meter of automotive grade.
Background technique
Electric car refers to using vehicle power supply as power, with motor driven wheels travel, meets road traffic, security legislation
The vehicle of requirements.Since effect on environment is smaller with respect to orthodox car, its prospects are considered optimistic wildly, but current techniques are still not
It is mature.Automotive grade energy-consumption monitoring system being set using no temperature compensation current divider and voltage hall sensor in integrated currently on the market
Meter.
However current energy-consumption monitoring system is not able to satisfy the needs of vehicle-mounted grade.Current energy-consumption monitoring system is anti-interference
Property is poor, and performance is unstable, this results in measurement error, and precision is poor, influence using.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of direct current energy meters of automotive grade, can measure electric energy, resist
Interference performance is strong, reliable and stable.
In order to solve the above-mentioned technical problems, the present invention provides a kind of direct current energy meter of automotive grade, including main control chip,
The main control chip is used for the data operation and communication process of electric energy；
CAN control circuit, the CAN control circuit are connect with main control chip, are used for the main control chip and Full Vehicle System
Data interaction；
High-voltage acquisition circuit, the high-voltage acquisition circuit are connect with main control chip, are used for collection voltages；
Current collection circuit, the current collection circuit is connect with main control chip, for acquiring electric current；
Isolated power supply circuit, input voltage generate non-interfering first voltage signal after the isolated power supply circuit
With second voltage signal, the first voltage signal is used to power to the main control chip, and the second voltage signal is for giving
The CAN control circuit power supply.
Preferably, the current collection circuit includes current divider, NTC temperature acquisition is provided in the main control chip
Circuit, the NTC temperature collection circuit can acquire the current divider Current Temperatures in real time, and carry out temperature benefit to current divider
It repays.
Preferably, the current divider both ends are connected with the main control chip respectively, the main control chip with described point
The first capacitor for filtering is provided between the input terminal of stream device connection.
Preferably, the high-voltage acquisition circuit includes high-voltage acquisition end and low-voltage output, the high-voltage acquisition electricity
Road is divided by multiple concatenated first resistors, and the low-voltage output is connected with the main control chip.
Preferably, the low-voltage output is also arranged in parallel the second capacitor for filtering.
Preferably, the CAN control circuit includes first input end and the second input terminal, the isolated power supply circuit
Including the first isolated power supply mould group and the second isolated power supply mould group, the input voltage input terminal with the first isolated power supply mould group respectively
Connected with the input terminal of the second isolated power supply mould group, the output end of the first isolated power supply mould group respectively with the main control chip
It is connected with the first input end, the output end of the second isolated power supply mould group is connect with second input terminal.
Preferably, the auxiliary power circuit for preventing reversal connection is provided between the isolated power supply and input voltage, it is described
The TVS pipe for preventing transient voltage to be mutated is provided in auxiliary power circuit.
Compared with prior art, the beneficial effects of the present invention are: the present invention can measure electric energy, and it is provided with isolated power supply
Circuit generates non-interfering first voltage signal and second voltage signal, and two voltage signals are not interfere with each other, first electricity
Signal is pressed to be used to power to the main control chip, second voltage signal is used to power to the CAN control circuit, then master control core
The operation is stable of piece and CAN control circuit, this allows for direct current energy meter strong antijamming capability, reliable and stable.
Detailed description of the invention
It, below will be in embodiment technical description for the clearer technical solution illustrated in technology of the embodiment of the present invention
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Example is applied, for those of ordinary skill in the art, without creative efforts, additionally it is possible to according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural diagram of the present invention.
Wherein, 1, auxiliary power circuit；2, isolated power supply circuit；21, the first isolated power supply mould group；22, the second isolation electricity
Source mould group；3, CAN control circuit；4, current collection circuit；41, current divider；42, first capacitor；5, high-voltage acquisition circuit；51,
Second capacitor；6, main control chip；7, NTC temperature collection circuit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment
Shown in referring to Fig.1, the invention discloses a kind of direct current energy meter of automotive grade, including main control chip 6, CAN controls
Circuit 3, high-voltage acquisition circuit 5, current collection circuit 4 and isolated power supply circuit 2.
Wherein, the main control chip 6 is used for the data operation and communication process of electric energy.The preferred Freescale machine of main control chip
Vehicle grade chip, such as S32K14XMCLUYG model or MM9Z1_638 model.
The CAN control circuit 3 is connect with main control chip 6, for the main control chip 6 and Full Vehicle System data interaction.
The high-voltage acquisition circuit 5 is connect with main control chip 6, is used for collection voltages；
The current collection circuit 4 is connect with main control chip 6, for acquiring electric current；
Input voltage generates non-interfering first voltage signal and second voltage letter after the isolated power supply circuit 2
Number, the first voltage signal is used to power to the main control chip 6, and second voltage signal is used for the CAN control circuit 3
Power supply.The CAN control circuit 3 includes first input end and the second input terminal, and the isolated power supply circuit 2 includes the first isolation
Power supply mould group 21 and the second isolated power supply mould group 22, the input voltage input terminal and second with the first isolated power supply mould group 21 respectively
The input terminal of isolated power supply mould group 22 connects, the output end of the first isolated power supply mould group 21 respectively with the main control chip 6
It is connected with the first input end, the output end of the second isolated power supply mould group 22 is connect with second input terminal.This reality
It applies in example, first voltage signal and second voltage signal are all 5V voltage.First isolated power supply mould group 21 and the second isolated power supply
Isolated power supply chip is set in mould group 22, the chip of LM2596 model can be selected in isolated power supply chip.
The current collection circuit 4 includes current divider 41, is provided with NTC temperature collection circuit 7 in the main control chip 6,
The NTC temperature collection circuit 7 can acquire 41 Current Temperatures of current divider in real time, and carry out temperature benefit to current divider 41
It repays.It acquires current divider temperature in real time using NTC, can compensate because of test value variation caused by temperature change, improve test essence
Exactness.For traditional automotive grade electric energy meter, the interference free performance of voltage hall sensor is poor, and operating temperature is low, maximum temperature
Generally at 85 DEG C；Temperature drift is big, be affected by temperature it is larger, can be bigger by measurement error caused by the excessive temperature change of electric current.
41 both ends of current divider are connect with the main control chip 6 respectively, and the main control chip 6 connects with the current divider 41
The first capacitor 42 for filtering is provided between the input terminal connect.
The high-voltage acquisition circuit 5 includes high-voltage acquisition end and low-voltage output, and the high-voltage acquisition circuit 5 passes through multiple
Concatenated first resistor partial pressure, the low-voltage output are connect with the main control chip 6.
The low-voltage output is also arranged in parallel the second capacitor 51 for filtering.
The auxiliary power circuit 1 for preventing reversal connection, the accessory power supply electricity are provided between the isolated power supply and input voltage
The TVS pipe for preventing transient voltage to be mutated is provided in road 1.The input voltage of the voltage output end of auxiliary circuit is 9-36V.
The working principle of the invention is: by high-accuracy current divider monitor to obtain circuit current value and with current NTC temperature
Degree obtains current value according to being calculated；High-voltage end obtains voltage value after high-voltage acquisition Di Nalu partial pressure；By calculating,
To obtain the energy consumption size in circuit.
Relative to traditional technology, the beneficial effects of the present invention are:
1, the operating temperature of traditional no temperature compensation current divider and voltage hall sensor product is at -35 DEG C -85 DEG C, the present invention
Operating temperature range is wide, and operating temperature is at -40 DEG C -125 DEG C, much higher than traditional energy monitor device.
2, the configuration of the present invention is simple, size is small and exquisite, occupies little space.
3, highest monitoring current of the present invention reaches 600A, much larger than the energy consumption monitoring product of the 300A of existing market mainstream.
4, strong antijamming capability, it is reliable and stable.
5, it acquires current divider temperature in real time using NTC, can compensate because of test value variation caused by temperature change, improve
Testing precision.
6, easy to use, cheap, cost performance is high.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to consistent with principles disclosed herein and novel point
Widest scope.
Claims (7)
1. a kind of direct current energy meter of automotive grade, which is characterized in that including
Main control chip, the main control chip are used for the data operation and communication process of electric energy；
CAN control circuit, the CAN control circuit are connect with main control chip, for the main control chip and Full Vehicle System data
Interaction；
High-voltage acquisition circuit, the high-voltage acquisition circuit are connect with main control chip, are used for collection voltages；
Current collection circuit, the current collection circuit is connect with main control chip, for acquiring electric current；
Isolated power supply circuit, input voltage generate non-interfering first voltage signal and after the isolated power supply circuit
Two voltage signals, the first voltage signal are used to power to the main control chip, and the second voltage signal is used for described
The power supply of CAN control circuit.
2. the direct current energy meter of automotive grade as described in claim 1, which is characterized in that the current collection circuit includes shunting
Device, NTC temperature collection circuit is provided in the main control chip, and the NTC temperature collection circuit can acquire described point in real time
Device Current Temperatures are flowed, and temperature-compensating is carried out to current divider.
3. the direct current energy meter of automotive grade as claimed in claim 2, which is characterized in that the current divider both ends respectively with it is described
Main control chip connection is provided with the first electricity for filtering between the main control chip and the input terminal of current divider connection
Hold.
4. the direct current energy meter of automotive grade as described in claim 1, which is characterized in that the high-voltage acquisition circuit includes high pressure
Collection terminal and low-voltage output, the high-voltage acquisition circuit are divided by multiple concatenated first resistors, the low-voltage output
It is connected with the main control chip.
5. the direct current energy meter of automotive grade as claimed in claim 4, which is characterized in that the low-voltage output is also arranged in parallel
There is the second capacitor for filtering.
6. the direct current energy meter of automotive grade as described in claim 1, which is characterized in that the CAN control circuit includes first
Input terminal and the second input terminal, the isolated power supply circuit includes the first isolated power supply mould group and the second isolated power supply mould group, defeated
Enter voltage to connect with the input terminal of the input terminal of the first isolated power supply mould group and the second isolated power supply mould group respectively, described first every
Output end from power supply mould group is connect with the main control chip and the first input end respectively, the second isolated power supply mould group
Output end connect with second input terminal.
7. the direct current energy meter of automotive grade as described in claim 1, which is characterized in that between the isolated power supply and input voltage
It is provided with the auxiliary power circuit for preventing reversal connection, the TVS pipe for preventing transient voltage to be mutated is provided in the auxiliary power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173415.3A CN109239454A (en) | 2018-10-09 | 2018-10-09 | A kind of direct current energy meter of automotive grade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173415.3A CN109239454A (en) | 2018-10-09 | 2018-10-09 | A kind of direct current energy meter of automotive grade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109239454A true CN109239454A (en) | 2019-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811173415.3A Pending CN109239454A (en) | 2018-10-09 | 2018-10-09 | A kind of direct current energy meter of automotive grade |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202057688U (en) * | 2011-03-31 | 2011-11-30 | 华立仪表集团股份有限公司 | DC ammeter of electric vehicle |
| CN103149431A (en) * | 2013-03-19 | 2013-06-12 | 青岛乾程电子科技有限公司 | Multifunction watt-hour meter |
| CN106443150A (en) * | 2016-06-20 | 2017-02-22 | 深圳市沃特玛电池有限公司 | Current sensor based on diverter |
| US20170356939A1 (en) * | 2016-06-14 | 2017-12-14 | Jonathan Ephraim David Hurwitz | Method of and apparatus for learning the phase error or timing delays within a current transducer and power measurement apparatus including current transducer error correction |
| CN206807114U (en) * | 2017-05-08 | 2017-12-26 | 浙江树人学院 | The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter |
| CN206848362U (en) * | 2017-05-19 | 2018-01-05 | 浙江永泰隆电子股份有限公司 | Intelligent wireless device for measurement of electrical energy |
| CN107942251A (en) * | 2017-10-23 | 2018-04-20 | 宁德时代新能源科技股份有限公司 | Current detection system, method and current detection device |
-
2018
- 2018-10-09 CN CN201811173415.3A patent/CN109239454A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202057688U (en) * | 2011-03-31 | 2011-11-30 | 华立仪表集团股份有限公司 | DC ammeter of electric vehicle |
| CN103149431A (en) * | 2013-03-19 | 2013-06-12 | 青岛乾程电子科技有限公司 | Multifunction watt-hour meter |
| US20170356939A1 (en) * | 2016-06-14 | 2017-12-14 | Jonathan Ephraim David Hurwitz | Method of and apparatus for learning the phase error or timing delays within a current transducer and power measurement apparatus including current transducer error correction |
| CN106443150A (en) * | 2016-06-20 | 2017-02-22 | 深圳市沃特玛电池有限公司 | Current sensor based on diverter |
| CN206807114U (en) * | 2017-05-08 | 2017-12-26 | 浙江树人学院 | The full decompression detection metering chip power supply circuit of three-phase intelligent ammeter |
| CN206848362U (en) * | 2017-05-19 | 2018-01-05 | 浙江永泰隆电子股份有限公司 | Intelligent wireless device for measurement of electrical energy |
| CN107942251A (en) * | 2017-10-23 | 2018-04-20 | 宁德时代新能源科技股份有限公司 | Current detection system, method and current detection device |
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Application publication date: 20190118 |