CN108318820A - Method for reproducing metal foreign body short circuit of lithium ion battery - Google Patents
Method for reproducing metal foreign body short circuit of lithium ion battery Download PDFInfo
- Publication number
- CN108318820A CN108318820A CN201711318106.6A CN201711318106A CN108318820A CN 108318820 A CN108318820 A CN 108318820A CN 201711318106 A CN201711318106 A CN 201711318106A CN 108318820 A CN108318820 A CN 108318820A
- Authority
- CN
- China
- Prior art keywords
- foreign body
- short circuit
- metallic foreign
- resistance value
- lithium ion
- 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
- 238000000034 method Methods 0.000 title claims abstract description 18
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 9
- 239000002184 metal Substances 0.000 title claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 239000004020 conductor Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 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
- 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
-
- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a method for reproducing a metal foreign body short circuit of a lithium ion battery, which can ensure that when the current in a test loop is increased to a certain degree, the air switch is turned off to finish short circuit, so as to prevent the short circuit current from damaging a test module, such as melting a contact point of the module, and the like, ensure the safety of the module in a short circuit test, lay a foundation for test reproduction, and reduce test loss. In addition, the current on the test loop can be adjusted by connecting the sliding rheostat, so that the flexibility of the test is ensured.
Description
Technical field
The present invention relates to the sides that technical field of lithium batteries more particularly to a kind of lithium ion battery reproduce metallic foreign body short circuit
Method.
Background technology
Since the increasingly depleted of fossil energy, people increasingly increase to environmental requirement, and country is to new-energy automobile
Policy support, new-energy automobile greatly developed.Lithium ion battery has larger energy density, higher work electricity
Pressure, the advantages that excellent cycle performance, memory-less effect, self-discharge rate is low, internal resistance is small and environmental pollution is small so that with lithium from
Sub- battery is electric vehicle, the hybrid vehicle of the core energy, becomes the main force of new-energy automobile market.
Metallic foreign body is fallen in battery modules, connects adjacent battery modules, causes battery external short circuit, is to cause battery
The common cause of accident.When reproducing metallic foreign body short circuit, when being directly placed in metallic foreign body on module, short circuit current is very big,
Metallic foreign body and module are point contacts, and contact point can be short-circuited electric current and melt away after short circuit occurs, and cause experiment to stop, Wu Fazai
Existing metallic foreign body short circuit experiment.
Invention content
Technical problems based on background technology, the present invention propose a kind of lithium ion battery reproduction metallic foreign body short circuit
Method.
The method that a kind of lithium ion battery proposed by the present invention reproduces metallic foreign body short circuit, includes the following steps：
S1, by conducting wire by the air switch that one or more slide rheostats and one open be connected on two it is to be tested
Between module；
S2, two modules to be tested are connected by metallic foreign body, slide rheostat, air switch, metallic foreign body and two
A tape test module forms test loop；
S3, slide rheostat resistance value is adjusted to maximum, is closed air switch, adjust slide rheostat resistance value to scheduled resistance
Value.
Preferably, it is by the concrete mode that metallic foreign body connects by two modules to be tested：By two modules to be tested
Sheet metal connect with metallic foreign body.
Preferably, further include in step S1：Obtain the contact electricity of conductor resistance value, air switch resistance value and sheet metal
Resistance value.
Preferably, further include step S4：After record adjusts slide rheostat resistance value to scheduled resistance value, two test modules
Voltage with the time change curve.
In the present invention, passes through and accesses air switch, it is ensured that, it is empty when the electric current in test loop increases to a certain extent
Air cock rotation, which disconnects, terminates short circuit, prevents short circuit current from being damaged to test module, such as melt the contact point etc. of module,
The safety that ensure that module in short-circuit test is reproduced for test and is laid a good foundation, and reduces test loss.In addition, passing through access
The electric current on test loop can be adjusted in slide rheostat, to ensure the flexibility of test.
As it can be seen that by means of the invention it is also possible to reproduce the short circuit of lithium ion battery metallic foreign body, avoid because directly will be golden
When category foreign matter is placed on module, since short circuit current is very big, contact point is short-circuited electric current and melts away after causing short circuit to occur, and causes
The case where testing and stop, metallic foreign body short circuit experiment can not be reproduced.By adjusting slide rheostat so that metallic foreign body short circuit is real
Testing can carry out under scheduled outside batteries line resistance, to simulate the metallic foreign body short circuit experiment of different contact resistances.
Description of the drawings
Fig. 1 is the method flow diagram that a kind of lithium ion battery proposed by the present invention reproduces metallic foreign body short circuit；
Fig. 2 is the volt-time curve figure that module is tested in short-circuit process.
Specific implementation mode
Referring to Fig.1, a kind of lithium ion battery proposed by the present invention reproduces the method for metallic foreign body short circuit, including following step
Suddenly.
S1, by conducting wire by the air switch that one or more slide rheostats and one open be connected on two it is to be tested
Between module.Further include obtaining conductor resistance value, the contact resistance value of air switch resistance value and sheet metal in this step,
To facilitate follow-up calculating and observation.
S2, two modules to be tested are connected by metallic foreign body, slide rheostat, air switch, metallic foreign body and two
A tape test module forms test loop.In this step, concrete mode that two modules to be tested are connected by metallic foreign body
For：The sheet metal of two modules to be tested is connect with metallic foreign body, so that survey time road is conductive after air switch closure so that
Two test module short circuits.
S3, slide rheostat resistance value is adjusted to maximum, is closed air switch, it is real to start lithium ion battery metallic foreign body short circuit
It tests, adjusts slide rheostat resistance value to scheduled resistance value, carry out the metallic foreign body short circuit experiment of predetermined battery outside line resistance value.
After S4, record adjust slide rheostat resistance value to scheduled resistance value, the voltage of two test modules is with the time
Change curve.In this step, by the voltage acquisition line being arranged on test module, the voltage time obtained in short-circuit process is bent
Line.
Above method is described further below in conjunction with a specific embodiment.
In the present embodiment, scheduled resistance value is 120m Ω, and concatenated slide rheostat is 1 between two test modules.
In the present embodiment, before short-circuit test, conductor resistance, air switch resistance, sheet metal contact are measured by multimeter
Resistance, above-mentioned resistance value add up to 120m Ω, in addition the resistance value 120m Ω of slide rheostat, in short-circuit process except battery modules
Circuit line resistance is 240m Ω.
Fig. 2 is the volt-time curve of two modules measuring in short-circuit process in the present embodiment.As can be seen from Figure 2, electric
When the metallic foreign body short circuit that circuit line resistance except the module of pond is 240m Ω starts rear 1336s, module 1, the module 2 being short-circuited are electric
Pressure respectively since short circuit before 3.332V become 3.2994V, 3.2943V, voltage maintains always 3.29- during this period
Between 3.30V, in showing that metallic foreign body short circuit duration carries out.
As it can be seen that by means of the invention it is also possible to reproduce the short circuit of lithium ion battery metallic foreign body, avoid because directly will be golden
When category foreign matter is placed on module, since short circuit current is very big, contact point is short-circuited electric current and melts away after causing short circuit to occur, and causes
The case where testing and stop, metallic foreign body short circuit experiment can not be reproduced.By adjusting slide rheostat so that metallic foreign body short circuit is real
Testing can carry out under scheduled outside batteries line resistance, to simulate the metallic foreign body short circuit experiment of different contact resistances.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of method that lithium ion battery reproduces metallic foreign body short circuit, which is characterized in that include the following steps：
S1, one or more slide rheostats and an air switch opened are connected on by two modules to be tested by conducting wire
Between；
S2, two modules to be tested are connected by metallic foreign body, slide rheostat, air switch, metallic foreign body and two bands
It tests module and forms test loop；
S3, slide rheostat resistance value is adjusted to maximum, is closed air switch, adjust slide rheostat resistance value to scheduled resistance value.
2. the method that lithium ion battery as described in claim 1 reproduces metallic foreign body short circuit, which is characterized in that be measured by two
Die trial group is by the concrete mode that metallic foreign body connects：The sheet metal of two modules to be tested is connect with metallic foreign body.
3. the method that lithium ion battery as claimed in claim 2 reproduces metallic foreign body short circuit, which is characterized in that in step S1 also
Including：Obtain conductor resistance value, the contact resistance value of air switch resistance value and sheet metal.
4. the method that lithium ion battery as described in claim 1 reproduces metallic foreign body short circuit, which is characterized in that further include step
S4：Record adjust slide rheostat resistance value to scheduled resistance value after, two test module voltages with the time change curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711318106.6A CN108318820A (en) | 2017-12-12 | 2017-12-12 | Method for reproducing metal foreign body short circuit of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711318106.6A CN108318820A (en) | 2017-12-12 | 2017-12-12 | Method for reproducing metal foreign body short circuit of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108318820A true CN108318820A (en) | 2018-07-24 |
Family
ID=62891747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711318106.6A Pending CN108318820A (en) | 2017-12-12 | 2017-12-12 | Method for reproducing metal foreign body short circuit of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108318820A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765721A (en) * | 2011-09-08 | 2014-04-30 | 日立车辆能源株式会社 | Battery system monitoring device |
| US20150102817A1 (en) * | 2013-10-15 | 2015-04-16 | Robert Bosch Gmbh | Short-circuit detection apparatus for detecting short circuits of a battery cell and method for short-circuit detection |
| CN104617347A (en) * | 2015-01-27 | 2015-05-13 | 合肥国轩高科动力能源股份公司 | Circuit and device for testing short circuit before fluid filling of square lithium battery as well as use method |
| CN205749832U (en) * | 2016-01-20 | 2016-11-30 | 上海储融检测技术股份有限公司 | Battery short circuit testing device |
| CN106970292A (en) * | 2017-04-27 | 2017-07-21 | 苏州博众精工科技有限公司 | A kind of battery pole piece cuts short-circuit alarming circuit |
-
2017
- 2017-12-12 CN CN201711318106.6A patent/CN108318820A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765721A (en) * | 2011-09-08 | 2014-04-30 | 日立车辆能源株式会社 | Battery system monitoring device |
| US20150102817A1 (en) * | 2013-10-15 | 2015-04-16 | Robert Bosch Gmbh | Short-circuit detection apparatus for detecting short circuits of a battery cell and method for short-circuit detection |
| CN104617347A (en) * | 2015-01-27 | 2015-05-13 | 合肥国轩高科动力能源股份公司 | Circuit and device for testing short circuit before fluid filling of square lithium battery as well as use method |
| CN205749832U (en) * | 2016-01-20 | 2016-11-30 | 上海储融检测技术股份有限公司 | Battery short circuit testing device |
| CN106970292A (en) * | 2017-04-27 | 2017-07-21 | 苏州博众精工科技有限公司 | A kind of battery pole piece cuts short-circuit alarming circuit |
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| 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: 20180724 |
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| RJ01 | Rejection of invention patent application after publication |