CN108627772A - A kind of lithium battery grouping output voltage method for rapidly testing - Google Patents
A kind of lithium battery grouping output voltage method for rapidly testing Download PDFInfo
- Publication number
- CN108627772A CN108627772A CN201810418277.4A CN201810418277A CN108627772A CN 108627772 A CN108627772 A CN 108627772A CN 201810418277 A CN201810418277 A CN 201810418277A CN 108627772 A CN108627772 A CN 108627772A
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- Prior art keywords
- lithium battery
- voltage
- pressure difference
- output voltage
- rapidly testing
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000002159 abnormal effect Effects 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
Abstract
The invention discloses lithium batteries to be grouped output voltage method for rapidly testing, controls the control terminal of Multipexer selector by microcontroller first, and whether the voltage acquired successively on battery winding displacement is normal value；If it is normal value, then signal that battery winding displacement voltage is switched to BQ76920 detection inputs by AOD4407 pipes.If abnormal, cell voltage will not be switched to BQ76920 detection inputs by PMOS.Second step detects multisection lithium battery by lithium battery managing chip, acquires cell voltage, calculates maximum voltage value, minimum amount of voltage that in a program.Then the pressure difference for calculating voltage max and voltage minimum automatically judges whether to be more than regulation pressure difference.Present invention detection lithium battery group is efficient, the device integrated level higher, is easy extension, the R＆D cycle is short, and circuit is simple and reliable, small, superior performance is suitble to battery pack finished product voltage detecting, and fault-tolerant ability is strong, and detection speed is fast, as a result accurate, precision is high, strong antijamming capability, and system is reliable and stable.
Description
Technical field
The present invention relates to lithium battery detection field, more particularly to a kind of lithium battery is grouped output voltage method for rapidly testing.
Background technology
In lithium electricity battery pack production process, since there are cell voltage unevenness, pressure difference is excessive, winding displacement welding mistake and weldering
Situations such as line is fallen is easy to influence the harmony of lithium battery, or even is damaged to lithium electricity BMS system boards.It is general at present to use
Multimeter measures the voltage between each monomer successively, then calculates pressure difference by worker's mental arithmetic or other computing devices, sentences
Whether the sequence that breaks is correct, is easy there is a problem of that artificial misregistration and working efficiency are low.
Invention content
The purpose of the present invention is to solve the above problems, disclose a kind of lithium battery grouping output voltage method for rapidly testing.
In order to achieve the above objectives, the method that the present invention uses is：A kind of lithium battery grouping output voltage method for rapidly testing,
Include the following steps：
A) control terminal of main control chip control Multipexer selector, the voltage gated successively in order on battery winding displacement are extremely simulated
The output end of multiple selector, multiple according to the total gating of lithium battery string number, often gating is primary, and SCM program detects battery electricity
Whether pressure is normal value；
If b) abnormal, cell voltage will not be switched to lithium battery managing chip detection input by PMOS tube；
C) if it is normal value, then signaling, it is defeated that battery winding displacement voltage is switched to the detection of lithium battery managing chip by PMOS tube
Enter end；
D) every lithium battery managing chip detects multisection lithium battery, and lithium electricity managing chip is connected with main control chip, main control chip journey
Sequence acquires cell voltage, calculates maximum voltage value, minimum amount of voltage that in a program, then calculates voltage max and electricity automatically
The pressure difference for pressing minimum value judges whether that the cell voltage and pressure difference more than regulation pressure difference, while acquisition are shown over the display
Show；
If e) pressure difference is then carried out less than regulation pressure difference through warning device alarm.
As an improvement of the present invention, the main control module uses microcontroller.
As an improvement of the present invention, the model 74HC4051D of the Multipexer selector.
As an improvement of the present invention, the module of the lithium battery managing chip is BQ76920.
As an improvement of the present invention, the model AOD4407 of the PMOS tube.
As an improvement of the present invention, pass through diode and divider resistance between Multipexer selector and microcontroller
It is connected.
As an improvement of the present invention, the warning device is buzzer.
As an improvement of the present invention, the system further includes GPS system.
Advantageous effect：
The present invention is detected using lithium battery managing chip BQ76920, and detection lithium battery group is efficient, and the device integrated level is more
Height is easy extension, and the R＆D cycle is short, and circuit is simple and reliable, small, superior performance, is suitble to battery pack finished product voltage detecting.It should
Method fault-tolerant ability is strong, and detection speed is fast, and as a result accurately, precision is high, strong antijamming capability, and system is reliable and stable.And this method
Can one-time detection can find all voltage problems, and in the case where welding mistake, lithium battery will not be to detection electricity
Road damages.
Description of the drawings
Fig. 1 is the hardware elementary diagram of the present invention.
Fig. 2 is the software logic figure of the present invention.
Specific implementation mode
Technical solution provided by the invention is described in detail below with reference to specific embodiment, it should be understood that following specific
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.
As described in Figure 1 for the present invention hardware elementary diagram, the test system include Multipexer selector 74HC4051D,
Microcontroller, PMOS tube AOD4407, lithium battery managing chip BQ76920, diode, divider resistance and LCD display（In figure
It does not mark）With buzzer warning device（It is not marked in figure）.Multipexer selector 74HC4051D passes through diode, partial pressure electricity
Resistance is connected with microcontroller, and Multipexer selector 74HC4051D also passes through PMOS tube AOD4407 and lithium battery managing chip
BQ76920 connections, lithium electricity managing chip BQ76920 are connected by iic bus with the IIC interfaces of microcontroller.
It is illustrated in figure 2 the software flow pattern of the present invention, specific testing procedure includes as follows：Microcontroller control simulation is more
The control terminal of road selector 74HC4051D gates the voltage on battery winding displacement to the output end of 74HC4051D successively in order.
It is multiple according to the total gating of lithium battery string number.Often gating is primary, and SCM program detects whether cell voltage is normal value.If
It is normal value, then signals that battery winding displacement voltage is switched to BQ76920 detection inputs by AOD4407 pipes.If not just
Often, then cell voltage will not be switched to BQ76920 detection inputs by PMOS.It can be detected whether here by diode
Circuit is reversed, can limit in a certain range voltage by divider resistance, has prevented reversed or voltage is excessive, right
System damages.Whether this procedure normal to detect battery pack Series connection welding, prevent from manually welding winding displacement it is wrong, herein for
It preliminarily detects, fine detection in next step can be entered by having passed through Preliminary detection.
It is to have passed through Preliminary detection if program judges that line sequence, voltage are normal, microcontroller is sent high by I/O port at this time
Level, is connected relevant AO4407 PMOS tube, and the voltage at battery winding displacement end is added into the input terminal of BQ76920.
Every lithium battery managing chip BQ76920 detects multisection lithium battery, and lithium electricity managing chip BQ76920 is total by IIC
Line is connected with the IIC interfaces of microcontroller.SCM program acquires cell voltage, calculates maximum voltage value, minimum in a program
Voltage value.Then the pressure difference for calculating voltage max and voltage minimum automatically judges whether to be more than regulation pressure difference, while handle
The cell voltage and pressure difference of acquisition are shown on color LCD.If pressure difference then carries out buzzer and carries less than regulation pressure difference
Show, otherwise buzzer there will not be auditory tone cues.
The present invention is detected using lithium battery managing chip BQ76920, and detection lithium battery group is efficient, and the device is integrated
Higher is spent, extension is easy, the R＆D cycle is short, and circuit is simple and reliable, small, superior performance, is suitble to battery pack finished product voltage inspection
It surveys.This method fault-tolerant ability is strong, and detection speed is fast, and as a result accurately, precision is high, strong antijamming capability, and system is reliable and stable.And it should
Method can one-time detection can find all voltage problems, and in the case where welding mistake, lithium battery will not be to inspection
Slowdown monitoring circuit damages.
The technical means disclosed in the embodiments of the present invention is not limited only to the technological means disclosed in the above embodiment, further includes
By the above technical characteristic arbitrarily the formed technical solution of combination.
Claims (7)
1. a kind of lithium battery is grouped output voltage method for rapidly testing, it is characterised in that：Include the following steps：
Main control chip controls the control terminal of Multipexer selector, and the voltage gated successively in order on battery winding displacement is more to simulating
The output end of road selector, multiple according to the total gating of lithium battery string number, often gating is primary, and SCM program detects cell voltage
Whether it is normal value；
If abnormal, cell voltage will not be switched to lithium battery managing chip detection input by PMOS tube；
If it is normal value, then signal that battery winding displacement voltage is switched to the detection input of lithium battery managing chip by PMOS tube
End；
Every lithium battery managing chip detects multisection lithium battery, and lithium electricity managing chip is connected with main control chip, main control chip program
Cell voltage is acquired, calculates maximum voltage value, minimum amount of voltage that in a program, then calculates voltage max and voltage automatically
The pressure difference of minimum value judges whether that the cell voltage and pressure difference more than regulation pressure difference, while acquisition are shown over the display；
If pressure difference is then carried out less than regulation pressure difference through warning device alarm.
2. a kind of lithium battery according to claim 1 is grouped output voltage method for rapidly testing, it is characterised in that：Described
Main control module uses microcontroller.
3. a kind of lithium battery according to claim 2 is grouped output voltage method for rapidly testing, it is characterised in that：Described
The model 74HC4051D of Multipexer selector.
4. a kind of lithium battery according to claim 2 is grouped output voltage method for rapidly testing, it is characterised in that：Described
The module of lithium battery managing chip is BQ76920.
5. a kind of test of lithium battery grouping output voltage method for rapidly testing according to claim 2, it is characterised in that：
The model AOD4407 of the PMOS tube.
6. a kind of test of lithium battery grouping output voltage method for rapidly testing according to claim 2, it is characterised in that：
It is connected by diode and divider resistance between Multipexer selector and microcontroller.
7. a kind of test of lithium battery grouping output voltage method for rapidly testing according to claim 1, it is characterised in that：
The warning device is buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418277.4A CN108627772A (en) | 2018-05-04 | 2018-05-04 | A kind of lithium battery grouping output voltage method for rapidly testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418277.4A CN108627772A (en) | 2018-05-04 | 2018-05-04 | A kind of lithium battery grouping output voltage method for rapidly testing |
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| Publication Number | Publication Date |
|---|---|
| CN108627772A true CN108627772A (en) | 2018-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810418277.4A Pending CN108627772A (en) | 2018-05-04 | 2018-05-04 | A kind of lithium battery grouping output voltage method for rapidly testing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740749A (en) * | 2021-09-06 | 2021-12-03 | 中山华野新能源有限公司 | Automatic detection method and system for battery pack connection |
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|---|---|---|---|---|
| CN201583636U (en) * | 2009-12-31 | 2010-09-15 | 深圳市力通威电子科技有限公司 | Power lithium battery capacity detection circuit with multi-channel switching functions |
| CN203490315U (en) * | 2013-08-29 | 2014-03-19 | 合肥国轩高科动力能源股份公司 | Anti-reverse-connection detection circuit for voltage acquisition flat cable |
| CN104078718A (en) * | 2014-07-11 | 2014-10-01 | 江苏工程职业技术学院 | Online detection device and method for voltage of battery end of lithium battery pack |
| CN204575823U (en) * | 2014-12-31 | 2015-08-19 | 深圳市科陆电子科技股份有限公司 | A kind of circuit that can carry out voltage sample to cell any in series battery |
| CN206450729U (en) * | 2016-12-27 | 2017-08-29 | 安徽力高新能源技术有限公司 | A kind of anti-misconnection circuit of multi-string battery voltage detecting |
| CN107607768A (en) * | 2017-08-21 | 2018-01-19 | 江西山水光电科技股份有限公司 | A kind of battery voltage measurement apparatus |
| CN206990730U (en) * | 2017-05-25 | 2018-02-09 | 无锡三石电子有限公司 | A kind of battery of electric vehicle positive-negative connected and detection circuit is not connect |
-
2018
- 2018-05-04 CN CN201810418277.4A patent/CN108627772A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201583636U (en) * | 2009-12-31 | 2010-09-15 | 深圳市力通威电子科技有限公司 | Power lithium battery capacity detection circuit with multi-channel switching functions |
| CN203490315U (en) * | 2013-08-29 | 2014-03-19 | 合肥国轩高科动力能源股份公司 | Anti-reverse-connection detection circuit for voltage acquisition flat cable |
| CN104078718A (en) * | 2014-07-11 | 2014-10-01 | 江苏工程职业技术学院 | Online detection device and method for voltage of battery end of lithium battery pack |
| CN204575823U (en) * | 2014-12-31 | 2015-08-19 | 深圳市科陆电子科技股份有限公司 | A kind of circuit that can carry out voltage sample to cell any in series battery |
| CN206450729U (en) * | 2016-12-27 | 2017-08-29 | 安徽力高新能源技术有限公司 | A kind of anti-misconnection circuit of multi-string battery voltage detecting |
| CN206990730U (en) * | 2017-05-25 | 2018-02-09 | 无锡三石电子有限公司 | A kind of battery of electric vehicle positive-negative connected and detection circuit is not connect |
| CN107607768A (en) * | 2017-08-21 | 2018-01-19 | 江西山水光电科技股份有限公司 | A kind of battery voltage measurement apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740749A (en) * | 2021-09-06 | 2021-12-03 | 中山华野新能源有限公司 | Automatic detection method and system for battery pack connection |
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Application publication date: 20181009 |
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