CN106569005A - Electric vehicle battery current accuracy test method - Google Patents
Electric vehicle battery current accuracy test method Download PDFInfo
- Publication number
- CN106569005A CN106569005A CN201610939714.8A CN201610939714A CN106569005A CN 106569005 A CN106569005 A CN 106569005A CN 201610939714 A CN201610939714 A CN 201610939714A CN 106569005 A CN106569005 A CN 106569005A
- Authority
- CN
- China
- Prior art keywords
- current value
- current
- diverter
- precision
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0038—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing pulses or pulse trains according to amplitude)
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The invention discloses an electric vehicle battery current accuracy test method and belongs to the automobile product testing field. The method includes the following steps that: a shunt, a multimeter, a charging and discharging device and a battery pack are connected with one another to form a circuit; a voltage value measured by the multimeter is obtained; based on Ohm's law, a standard current value can be obtained according to the voltage value and the resistance value of the shunt; the output current value of the battery pack is obtained by using a battery information management system; and current accuracy is obtained based on the output current value and the standard current value. Under the precision guarantee of the high-precision shunt, the accuracy of the standard current value obtained through calculation is high enough, and therefore, the precision of battery current accuracy testing can be ensured, and requirements of battery current accuracy can be satisfied.
Description
Technical field
The invention belongs to production vehicles field tests, more particularly to a kind of test side of batteries of electric automobile current precision
Method.
Background technology
For electric automobile, battery is to provide one of core component of power for it.In order to preferably ensure electronic
The operation of automobile, typically assesses the service condition of battery by state-of-charge SOC, and then come the use estimating and detect battery
Efficiency and safety.At present the evaluation method of SOC has：Open circuit voltage method, ampere-hour integration method, internal resistance method, neutral net and karr
Graceful filter method, wherein, ampere-hour integration is due to simple, effectively and reliable, it has also become the most commonly used method in existing SOC estimations.
In ampere-hour integration method, if current measurement is inaccurate, it will cause the calculation error of SOC, through long-term accumulation, can cause to miss
Difference is increasing so that final SOC estimations are inaccurate, accordingly, it would be desirable to pass through to carry out current precision test exactly.
Existing current precision test is that the electric current gathered by charging/discharging apparatus is compared with battery actual acquisition electric current,
With charging/discharging apparatus as standard source, battery current precision is calculated.
During the present invention is realized, the inventors discovered that at least there is problems with prior art：
Existing charging/discharging apparatus current precision is essentially 0.5%, and with the increase of charging/discharging apparatus use time, charge and discharge
Electric equipment occurs certain depreciation so that the current precision of measurement is reduced；Meanwhile, major part battery current required precision at present
It is even more little within 5%, so it is not accurate enough only to carry out the conclusion that obtains of current precision test by charging/discharging apparatus.
The content of the invention
In order to solve the inaccurate problem of certainty of measurement that existing current precision test is present, the present invention provides a kind of electronic vapour
The method of testing of car battery current precision.
Specifically, including following technical scheme：
A kind of method of testing of batteries of electric automobile current precision, including：
Diverter, circuit tester, charging/discharging apparatus and battery bag are connected into into circuit, wherein by the first end of the battery bag
The first end of the diverter is connected to, the second end of the battery bag is connected to into the first end of the charging/discharging apparatus, will
Second end of the charging/discharging apparatus is connected to the second end of the diverter, and the first test pencil of the circuit tester is connected to into institute
The first end of diverter is stated, the second test pencil of the circuit tester is connected to into the second end of the diverter；
Obtain the magnitude of voltage that the circuit tester is measured；
According to the magnitude of voltage and the resistance value of the diverter, with reference to Ohm's law, standard current value is obtained；
The output current value of the battery bag is obtained using battery information management system；
The current precision is worth to according to the output current value and the normalized current.
Further, the diverter is high-accuracy current divider.
Further, the high-accuracy current divider is included diverter.
Further, the high-accuracy current divider precision is 0.05 grade.
Further, the circuit tester is digital multimeter.
Further, the circuit tester is six and half circuit testers.
Further, the magnitude of voltage that the acquisition circuit tester is measured includes：Computer receives the circuit tester and surveys
The magnitude of voltage measured；
It is described according to the magnitude of voltage and the resistance value of the diverter, with reference to Ohm's law, obtain standard current value bag
Include：The computer obtains normalized current according to the resistance value of the diverter of the magnitude of voltage for measuring and storage for receiving
Value；
The utilization battery information management system obtains the output current value of the battery bag to be included：The computer is received
The output current value of the battery bag that the battery information management system measurement is obtained；
It is described the current precision is worth to according to the output current value and the normalized current to include：The computer
According to the standard current value and the output current value, the current precision is calculated.
Further, it is described that the current precision is worth to according to the output current value and the normalized current, specifically
Including：Using the absolute value of the output current value and the standard current value difference divided by the standard current value, institute is obtained
State current precision.
The beneficial effect of technical scheme provided in an embodiment of the present invention：
By the way that diverter, circuit tester, charging/discharging apparatus and battery bag are connected into into circuit, obtain the circuit tester and measure
Magnitude of voltage, according to the magnitude of voltage and the resistance value of the diverter, with reference to Ohm's law, obtain standard current value, utilize
Battery information management system obtains the output current value of the battery bag, according to the output current value and the standard current value
The current precision is obtained, under the precision guarantee of high-accuracy current divider so that the precision foot of calculated standard current value
Enough height, so that it is guaranteed that the accuracy of battery current accuracy testing, meets the requirement of battery current precision.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of method flow of the method for testing of batteries of electric automobile current precision that one embodiment of the invention is provided
Figure；
Fig. 2 is a kind of test structure of the method for testing of batteries of electric automobile current precision that one embodiment of the invention is provided
Schematic diagram.
Specific embodiment
To make technical scheme and advantage clearer, below in conjunction with accompanying drawing embodiment of the present invention is made into
One step ground is described in detail.
A kind of method of testing of batteries of electric automobile current precision is present embodiments provided, as shown in figure 1, the method includes
Following steps：
Step 101：Diverter, circuit tester, charging/discharging apparatus and battery bag are connected into into circuit；
Specifically, as shown in Fig. 2 diverter, charging/discharging apparatus and battery bag be connected into into a loop, circuit tester with point
Stream device is in parallel, discharge and recharge is carried out to battery bag using charging/discharging apparatus, wherein the first end of battery bag is connected to into diverter
First end, by the second end of battery bag the first end of charging/discharging apparatus is connected to, and the second end of charging/discharging apparatus is connected to point
Second end of stream device, by the first test pencil of circuit tester the first end of diverter is connected to, and the second test pencil of circuit tester is connected to
Second end of diverter；
In the step for diverter, diverter is high-accuracy current divider, and high-accuracy current divider is included diverter,
High-accuracy current divider precision is 0.05 grade；For circuit tester, circuit tester is digital multimeter, and circuit tester is six and half general-purposes
Table.
Step 102：Obtain the magnitude of voltage that circuit tester is measured；
Specifically, computer receives the magnitude of voltage that circuit tester is measured；
Step 103：According to magnitude of voltage and the resistance value of diverter, with reference to Ohm's law, standard current value is obtained；
Specifically, computer obtains standard according to the resistance value of the diverter of the magnitude of voltage for measuring and storage for receiving
Current value；
Step 104：The output current value of battery bag is obtained using battery information management system；
Specifically, computer receives the output current value of the battery bag that battery information management system measurement is obtained；
Step 105：Current precision is worth to according to output current value and normalized current.
The step Computer is calculated current precision according to standard current value and output current value, specifically, profit
With the absolute value of output current value and standard current value difference divided by standard current value, current precision is obtained.
In actual applications, battery bag, high-accuracy current divider and charging/discharging apparatus are connected into into a loop, by six and half
Circuit tester is in parallel with high-accuracy current divider, and discharge and recharge is carried out to battery bag using charging/discharging apparatus；Examined using six and half circuit testers
Survey and record the magnitude of voltage at high-accuracy current divider two ends；The defeated of battery bag is obtained using the battery management information system in battery bag
Go out current value；According to magnitude of voltage and the resistance value of high-accuracy current divider, using Ohm's law, standard current value is calculated；Profit
With the absolute value of output current value and standard current value difference divided by standard current value, current precision is obtained.
The method that the present embodiment is provided, by the way that diverter, circuit tester, charging/discharging apparatus and battery bag are connected into into circuit,
The magnitude of voltage that circuit tester is measured is obtained, according to magnitude of voltage and the resistance value of diverter, with reference to Ohm's law, normalized current is obtained
Value, using battery information management system the output current value of battery bag is obtained, and is worth to according to output current value and normalized current
Current precision, under the precision guarantee of high-accuracy current divider so that the precision of calculated standard current value is sufficiently high, so as to
Guarantee the accuracy of battery current accuracy testing, meet the requirement of battery current precision.
The above is for only for ease of those skilled in the art and understands technical scheme, not to limit
The present invention.All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in this
Within the protection domain of invention.
Claims (8)
1. a kind of method of testing of batteries of electric automobile current precision, it is characterised in that include：
Diverter, circuit tester, charging/discharging apparatus and battery bag are connected into into circuit, wherein the first end of the battery bag is connected
To the first end of the diverter, the second end of the battery bag is connected to into the first end of the charging/discharging apparatus, will be described
Second end of charging/discharging apparatus is connected to the second end of the diverter, and the first test pencil of the circuit tester is connected to into described point
The first end of stream device, by the second test pencil of the circuit tester the second end of the diverter is connected to；
Obtain the magnitude of voltage that the circuit tester is measured；
According to the magnitude of voltage and the resistance value of the diverter, with reference to Ohm's law, standard current value is obtained；
The output current value of the battery bag is obtained using battery information management system；
The current precision is worth to according to the output current value and the normalized current.
2. method according to claim 1, it is characterised in that the diverter is high-accuracy current divider.
3. method according to claim 2, it is characterised in that the high-accuracy current divider is included diverter.
4. method according to claim 2, it is characterised in that the high-accuracy current divider precision is 0.05 grade.
5. the method according to right 1, it is characterised in that the circuit tester is digital multimeter.
6. method according to claim 1, it is characterised in that the circuit tester is six and half circuit testers.
7. method according to claim 1, it is characterised in that
It is described to obtain the magnitude of voltage that the circuit tester measures and include：Computer receives the magnitude of voltage that the circuit tester is measured；
It is described according to the magnitude of voltage and the resistance value of the diverter, with reference to Ohm's law, obtaining standard current value includes：Institute
Resistance value of the computer according to the diverter of the magnitude of voltage for measuring and storage for receiving is stated, standard current value is obtained；
The utilization battery information management system obtains the output current value of the battery bag to be included：The computer receives described
The output current value of the battery bag that battery information management system measurement is obtained；
It is described the current precision is worth to according to the output current value and the normalized current to include：The computer according to
The standard current value and the output current value, are calculated the current precision.
8. method according to claim 1, it is characterised in that described according to the output current value and the normalized current
The current precision is worth to, is specifically included：Removed with the absolute value of the standard current value difference using the output current value
With the standard current value, the current precision is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939714.8A CN106569005A (en) | 2016-10-25 | 2016-10-25 | Electric vehicle battery current accuracy test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939714.8A CN106569005A (en) | 2016-10-25 | 2016-10-25 | Electric vehicle battery current accuracy test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106569005A true CN106569005A (en) | 2017-04-19 |
Family
ID=58534738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610939714.8A Pending CN106569005A (en) | 2016-10-25 | 2016-10-25 | Electric vehicle battery current accuracy test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106569005A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870666A (en) * | 2017-12-04 | 2019-06-11 | 北京长城华冠汽车科技股份有限公司 | Current detecting calibration method |
| CN112731247A (en) * | 2020-12-29 | 2021-04-30 | 欣旺达电动汽车电池有限公司 | Calibration system, calibration method, and storage medium |
| CN112858768A (en) * | 2021-01-07 | 2021-05-28 | 力高(山东)新能源技术有限公司 | Circuit and method for improving current detection precision of current divider |
| CN113125835A (en) * | 2021-03-18 | 2021-07-16 | 苏州华兴源创科技股份有限公司 | Current precision detection system and detection method and BMS (battery management system) |
| CN114578278A (en) * | 2022-05-05 | 2022-06-03 | 瑞浦兰钧能源股份有限公司 | Automatic testing method and device for current sampling precision |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169167A (en) * | 2011-01-28 | 2011-08-31 | 深圳市佳华利道新技术开发有限公司 | Device and method for detecting calculation accuracy of state of charge (SOC) of battery pack |
| CN202196158U (en) * | 2011-08-24 | 2012-04-18 | 杭州三海电子有限公司 | Battery voltage and current calibration system |
| CN203117411U (en) * | 2012-12-18 | 2013-08-07 | 惠州市亿能电子有限公司 | BMS current error test system |
| WO2016050403A1 (en) * | 2014-10-02 | 2016-04-07 | Robert Bosch Gmbh | Battery management system and method for calibrating a sensor of a battery management system |
| CN105518473A (en) * | 2013-09-24 | 2016-04-20 | 株式会社Lg化学 | Device for detecting charging current accuracy of charging and discharging device |
| CN205384360U (en) * | 2016-01-26 | 2016-07-13 | 惠州市蓝微新源技术有限公司 | BMS current parameter calibrating device |
-
2016
- 2016-10-25 CN CN201610939714.8A patent/CN106569005A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169167A (en) * | 2011-01-28 | 2011-08-31 | 深圳市佳华利道新技术开发有限公司 | Device and method for detecting calculation accuracy of state of charge (SOC) of battery pack |
| CN202196158U (en) * | 2011-08-24 | 2012-04-18 | 杭州三海电子有限公司 | Battery voltage and current calibration system |
| CN203117411U (en) * | 2012-12-18 | 2013-08-07 | 惠州市亿能电子有限公司 | BMS current error test system |
| CN105518473A (en) * | 2013-09-24 | 2016-04-20 | 株式会社Lg化学 | Device for detecting charging current accuracy of charging and discharging device |
| WO2016050403A1 (en) * | 2014-10-02 | 2016-04-07 | Robert Bosch Gmbh | Battery management system and method for calibrating a sensor of a battery management system |
| CN205384360U (en) * | 2016-01-26 | 2016-07-13 | 惠州市蓝微新源技术有限公司 | BMS current parameter calibrating device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870666A (en) * | 2017-12-04 | 2019-06-11 | 北京长城华冠汽车科技股份有限公司 | Current detecting calibration method |
| CN112731247A (en) * | 2020-12-29 | 2021-04-30 | 欣旺达电动汽车电池有限公司 | Calibration system, calibration method, and storage medium |
| CN112731247B (en) * | 2020-12-29 | 2024-03-19 | 欣旺达动力科技股份有限公司 | Calibration system, calibration method, and storage medium |
| CN112858768A (en) * | 2021-01-07 | 2021-05-28 | 力高(山东)新能源技术有限公司 | Circuit and method for improving current detection precision of current divider |
| CN113125835A (en) * | 2021-03-18 | 2021-07-16 | 苏州华兴源创科技股份有限公司 | Current precision detection system and detection method and BMS (battery management system) |
| CN114578278A (en) * | 2022-05-05 | 2022-06-03 | 瑞浦兰钧能源股份有限公司 | Automatic testing method and device for current sampling precision |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102645636B (en) | Battery capacity detection method | |
| CN106125001B (en) | The fast evaluation method of the retired battery module actual capacity of electric car | |
| CN107015156B (en) | A battery health state detection method and device | |
| CN106569005A (en) | Electric vehicle battery current accuracy test method | |
| CN205898880U (en) | Parallelly connected battery branch circuit current detection device | |
| CN102809739A (en) | Method and device for checking storage battery internal resistance tester | |
| WO2022222433A1 (en) | Vehicle traction battery soh assessment method based on accelerated aging test and real vehicle working condition | |
| CN106324519A (en) | Test method of connection reliability of battery system | |
| CN110554328B (en) | HHT-based storage battery internal resistance measurement method and system | |
| CN104714181A (en) | Method and system for acquiring relationship of voltage and state of charge | |
| CN101285857B (en) | Alternating current voltage-electric current converter and device and method for measuring alternating-current small current | |
| Ningrum | Estimation of state of charge (SoC) using modified coulomb counting method with open circuit compensation for battery management system (BMS) | |
| CN111142032B (en) | Method, device and equipment for determining battery electric quantity and storage medium | |
| US20240069104A1 (en) | Effective capacity estimation method and system for supercapacitor energy storage systems | |
| CN107290669A (en) | A kind of diagnostic method of retired power battery box of electric vehicle | |
| CN109991545A (en) | A kind of battery pack detection method of quantity of electricity, device and terminal device | |
| CN203405512U (en) | Lead acid storage battery shorting current and internal resistance level testing device | |
| CN105068016A (en) | Battery power display control method and battery power display control circuit | |
| CN107037375B (en) | Method and device for measuring direct current internal resistance of battery | |
| Frivaldsky et al. | Design of measuring and evaluation unit for multi-cell traction battery system of industrial AGV | |
| CN112557933B (en) | Method and device for calculating battery state of health | |
| CN109633240A (en) | Power battery pack voltage detection method and device | |
| CN103529390A (en) | Battery residual electric amount measuring device based on single-chip microcomputer | |
| CN212301804U (en) | Battery capacity measuring system | |
| CN108828316A (en) | Line parameter circuit value measurement method, device and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170419 |
|
| RJ01 | Rejection of invention patent application after publication |