CN106969980A - Battery anti-explosion test system - Google Patents
Battery anti-explosion test system Download PDFInfo
- Publication number
- CN106969980A CN106969980A CN201710135852.5A CN201710135852A CN106969980A CN 106969980 A CN106969980 A CN 106969980A CN 201710135852 A CN201710135852 A CN 201710135852A CN 106969980 A CN106969980 A CN 106969980A
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- Prior art keywords
- explosion
- chamber
- casing
- test system
- battery anti
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
Abstract
The invention discloses a kind of battery anti-explosion test system, including：Casing；Partition component, partition component is arranged in casing and housing interior volume is separated into slow pressure test chamber and blast analogue chamber；Explosion-proof valve, explosion-proof valve is arranged on casing and the slow pressure test chamber of correspondence；First gas-charging connection and the second gas-charging connection, the first gas-charging connection are arranged on casing and the slow pressure test chamber of correspondence, and the second gas-charging connection is arranged on casing and correspondence blast analogue chamber.Battery anti-explosion test system according to embodiments of the present invention, partition component is arranged in casing and housing interior volume is separated into slow pressure test chamber and blast analogue chamber, and explosion-proof valve is arranged on the slow pressure test chamber of correspondence on casing, first gas-charging connection and the second gas-charging connection are inflated to slow pressure test chamber and blast analogue chamber respectively, checking to explosion-proof valve properties is realized by slow pressure modes of inflation and simulated explosion pattern, the battery anti-explosion test system structure is simple, convenient test and quick.
Description
Technical field
The invention belongs to technical field of new energy, more particularly to battery anti-explosion test system.
Background technology
With developing rapidly for electric automobile, battery bag is as electric automobile core key part, and it gets over to safety requirements
Come higher.Under extreme case, the phenomenons such as short circuit occur for battery bag so that battery bag internal temperature rapidly rises, when in battery bag
When the pressure in portion reaches preset pressure value, explosion-proof valve opens Quick air-discharge, prevents battery bag from exploding.
Therefore, it is the reliability of guarantee explosion-proof valve, needs to verify that its properties refers to before dispatching from the factory in design phase or batch
Mark, and to different air pressure and the response condition of blast, to improve the security of battery system.
The content of the invention
It is contemplated that at least solving one of above-mentioned technical problem to a certain extent.
Therefore, the present invention proposes a kind of battery anti-explosion test system, the battery anti-explosion test system structure is simple, test side
Just and reliably.
Battery anti-explosion test system according to embodiments of the present invention includes：Casing；Partition component, the partition component is set
Slow pressure test chamber and blast analogue chamber are separated into the casing and by the housing interior volume；Explosion-proof valve, it is described explosion-proof
Valve is arranged on the casing and the correspondence slow pressure test chamber；First gas-charging connection and the second gas-charging connection, described first fills
Gas joint is arranged on the casing and the correspondence slow pressure test chamber, second gas-charging connection be arranged on the casing and
The correspondence blast analogue chamber；Wherein described battery anti-explosion test system has slow pressure modes of inflation and simulated explosion pattern, its
In when the battery anti-explosion test system is in the slow pressure modes of inflation, by first gas-charging connection to the slow pressure
Test interacvity air-filling and the partition component opens the slow pressure test chamber with the blast analogue chamber airtight partition；In the electricity
When the explosion-proof test system in pond is in the simulated explosion pattern, filled by second gas-charging connection to the blast analogue intracavitary
Gas simultaneously breaks through at least a portion of the partition component with simulated explosion.
Battery anti-explosion test system according to embodiments of the present invention, the partition component is arranged in the casing and by institute
State housing interior volume and be separated into slow pressure test chamber and blast analogue chamber, and explosion-proof valve is arranged on the slow pressure test of correspondence on casing
Chamber, the first gas-charging connection and the second gas-charging connection are inflated to slow pressure test chamber and blast analogue chamber respectively, are filled by slow pressure
Gas pattern and simulated explosion pattern realize the checking to explosion-proof valve properties, and the battery anti-explosion test system structure is simple, survey
Examination is convenient and quick.
In addition, battery anti-explosion test system according to embodiments of the present invention, can also have technical characteristic additional as follows：
According to one embodiment of present invention, the partition component includes：Institute is in the battery anti-explosion test system
The separation membrane that can be broken through when stating simulated explosion pattern.
According to one embodiment of present invention, the separation membrane is flexible separating film.
According to one embodiment of present invention, the separation membrane is rubber membrane.
According to one embodiment of present invention, the partition component also includes：Demarcation strip, fixed part, the demarcation strip are consolidated
It is scheduled in the casing, demarcation strip through hole is provided with the demarcation strip, the separation membrane is fixed on described by the fixed part
Demarcation strip through hole on demarcation strip and described in the separation membrane closure.
According to one embodiment of present invention, the fixed part includes：Flange and threaded fastener, the flange surround institute
The setting of demarcation strip through hole is stated, the separation membrane is pressed on the demarcation strip by the flange, the threaded fastener is used for will
The flange is fixed on the demarcation strip.
According to one embodiment of present invention, the separation membrane includes：Central part and edge part, the edge part is around institute
Central part setting is stated, the edge part is pressed on the demarcation strip by the flange.
According to one embodiment of present invention, the central part is hemispherical.
According to one embodiment of present invention, first pressure table and second pressure table are additionally provided with the casing, it is described
First pressure table and the second pressure table are separately positioned on the casing, the first pressure table correspondence slow pressure test
Chamber, the second pressure table correspondence blast analogue chamber.
According to one embodiment of present invention, transparent observation window, the observation window and institute are additionally provided with the casing
State slow pressure test chamber correspondence.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the stereogram of battery anti-explosion test system according to an embodiment of the invention；
Fig. 2 is the stereogram of another angle of battery anti-explosion test system according to an embodiment of the invention；
Fig. 3 is the stereogram according to another angle of one embodiment of the invention battery anti-explosion test system, wherein, it is described
Casing is in open mode.
Reference：
Battery anti-explosion test system 100；
Casing 10；Slow pressure test chamber 11；Blast analogue chamber 12；Observation window 13；
Partition component 20；Separation membrane 21；Demarcation strip 22；Fixed part 23；Flange 231；Threaded fastener 232；
Explosion-proof valve 30；
First gas-charging connection 40；
Second gas-charging connection 50；
First pressure table 60；
Second pressure table 70.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Battery anti-explosion test system 100 according to embodiments of the present invention is described referring to Fig. 1 to Fig. 3.The battery anti-explosion
Test system 100 can be used for the sealing and the response condition to various pressure of test explosion-proof valve 30, for example, reaching setting
Opening pressure when, whether explosion-proof valve 30 can be opened；Or when reaching burst pressure, at least a portion of partition component 20 is
It is no to be broken through and whether explosion-proof valve 30 can be opened quickly to discharge gas.
As shown in Fig. 1 combinations Fig. 2 and Fig. 3, battery anti-explosion test system 100 includes：Casing 10, partition component 20 and explosion-proof
Valve 30.
Specifically, partition component 20 is arranged in casing 10 and the inner space of casing 10 is separated into the slow pressure He of test chamber 11
Blast analogue chamber 12.Explosion-proof valve 30 is arranged on casing 10 and the slow pressure test chamber 11 of correspondence.As shown in figure 3, the edge of partition component 20
The length direction (left and right directions in such as Fig. 3) of casing 10 is arranged in casing 10, and the inner space of casing 10 is separated into and is located at
The slow pressure test chamber 11 and the blast analogue chamber 12 positioned at downside of upside.It is understood that above-mentioned be only illustrative, not
It is the limitation to claimed scope of the invention, partition component 20 can also be (upper in such as Fig. 3 along the short transverse of casing 10
Lower direction) it is arranged in casing 10, so that the inner space of casing 10 is separated into the slow He of pressure test chamber 11 positioned at the left and right sides
Blast analogue chamber 12.
Wherein, explosion-proof valve 30 is connected with slow pressure test chamber 11 for opening or closing slow pressure test chamber 11, in slow pressure test
When pressure in chamber 11 is less than the Opening pressure of setting, the slow pressure test chamber 11 of the closing of explosion-proof valve 30 delays pressure test chamber and is in sealing
State.When the pressure in slow pressure test chamber 11 is equal to greatly the Opening pressure of setting, slow pressure test chamber 11, which is opened, passes through explosion-proof valve
30 discharge rapidly gas.
First gas-charging connection 40 is arranged on casing 10 and the slow pressure test chamber 11 of correspondence, and the second gas-charging connection 50 is arranged on case
On body 10 and correspondence blast analogue chamber 12.In other words, inflated by the first gas-charging connection 40 to slow pressure test chamber 11, pass through second
Gas-charging connection 50 is inflated to blast analogue chamber 12.
Battery anti-explosion system according to embodiments of the present invention has slow pressure modes of inflation and simulated explosion pattern.
Specifically, when battery anti-explosion test system 100 is in slow pressure modes of inflation, by the first gas-charging connection 40 to slow
Inflated in pressure test chamber 11 and partition component 20 opens slow pressure test chamber 11 with the airtight partition of blast analogue chamber 12.In battery anti-explosion
When test system 100 is in simulated explosion pattern, inflates and will separate into blast analogue chamber 12 by the second gas-charging connection 50
At least a portion of component 20 is broken through with simulated explosion.
Slow pressure modes of inflation is used for the sealing for testing explosion-proof valve 30 and when setting pressure reaches Opening pressure, explosion-proof valve
The 30 whether rapid gases by slow pressure test chamber 11 are discharged.Simulated explosion pattern is used to test at least the one of partition component 20
When part is broken through, the whether rapid gas by slow pressure test chamber 11 and blast analogue chamber 12 of explosion-proof valve 30 is discharged, and determines whole
The pressure release amount of individual battery anti-explosion test system 100, connects wherein the aeration speed of the first gas-charging connection 40 can be slower than the second inflation
First 50 aeration speed.Hereby it is achieved that the checking to the property indices of explosion-proof valve 30, for ensureing that the security of battery bag is carried
For important reference frame.
Battery anti-explosion test system 100 according to embodiments of the present invention, partition component 20 is arranged in casing 10 and by case
The inner space of body 10 is separated into slow pressure test chamber 11 and blast analogue chamber 12, and explosion-proof valve 30 is arranged on casing 10 into corresponding delay
Test chamber 11 is pressed, the first gas-charging connection 40 and the second gas-charging connection 50 are carried out to slow pressure test chamber 11 and blast analogue chamber 12 respectively
Inflation, the checking to the properties of explosion-proof valve 30 is realized by slow pressure modes of inflation and simulated explosion pattern, and the battery anti-explosion is surveyed
Test system 100 is simple in construction, convenient test and quick.
In some embodiments of the invention, partition component 20 includes：It is quick-fried that simulation is in battery anti-explosion test system 100
The separation membrane 21 that can be broken through during fried pattern.When the air pressure in blast analogue chamber 12 reaches that the pressure that separation membrane 21 can be born is (quick-fried
Broken pressure) when, separation membrane 21, which ruptures, causes the gas in blast analogue chamber 12 to enter slow pressure test chamber 11, and passes through explosion-proof valve 30
Quickly gas is discharged, during so as to analogue simulation battery bag explosion phenomenon and Validity Test explosion-proof valve 30 under burst pressure
Pressure release amount.
In some alternative embodiments, partition component 20 includes：Demarcation strip 22 and fixed part 23.Demarcation strip 22 is fixed on case
In body 10, demarcation strip through hole is provided with demarcation strip 22, separation membrane 21 is fixed on demarcation strip 22 and separation membrane by fixed part 23
21 closing demarcation strip through holes.As shown in figure 3, length direction of the demarcation strip 22 along casing 10 extends parallel to the bottom plate of casing 10
It is arranged at top plate in casing 10, so that the inner space of casing 10 is separated into positioned at the slow pressure test chamber 11 of upside and under being located at
The blast analogue chamber 12 of side.
Fixed part 23 is arranged at the top of demarcation strip 22 and separation membrane 21 is fixed on demarcation strip 22 to be led to closing demarcation strip
Hole.So as to ensure that battery anti-explosion test system 100, when carrying out slow pressure modes of inflation, delays pressure test chamber 11 and blast analogue chamber 12
Closed state is in, gas, which can not postpone, presses test chamber 11 to enter in blast analogue chamber 12, and gas also can not be from blast analogue
Chamber 12 enters in slow pressure test chamber 11.
Specifically, fixed part 23 includes：Flange 231 and threaded fastener 232.Flange 231 is set around demarcation strip through hole,
Separation membrane 21 is pressed on demarcation strip 22 by flange 231, and threaded fastener 232 is used to flange 231 being fixed on demarcation strip 22.
As shown in figure 3, the generally circular plate body of flange 231, annular plate is crimped on separation membrane 21.That is the quilt of at least part separation membrane 21
It is located between flange 231 and demarcation strip 22, and flange 231 and separation membrane 21 is fixed on by separation by threaded fastener 232
On plate 22., can be with thus, it is possible to separation membrane 21 is securely provided on demarcation strip 22, and when needing to change separation membrane 21
Threaded fastener 232 is unscrewed to remove separation membrane 21.
In other embodiments of the invention, separation membrane 21 includes：Central part and edge part.Edge part is set around central part
Put, edge part is pressed on demarcation strip 22 by flange 231.I.e. edge part is located in the lower surface and demarcation strip 22 of flange 231
Between upper surface, central part is correspondingly arranged with the through hole of demarcation strip 22, hereby it is achieved that separation membrane is fixed on demarcation strip 22.
Further, central part is hemispherical.As shown in figure 3, central part is surveyed beyond the place of demarcation strip 22 towards slow pressure
Examination chamber 11 protrudes, i.e., central part is by being recessed laterally toward the opposite side of slow pressure test chamber 11 towards the one of blast analogue chamber 12 and forming gas
Capsule.Thus, the deformability of separation membrane 21 is added, the situation of the preferably simulated battery bag blast of separation membrane 21 can be caused.
In some optional examples, separation membrane 21 is flexible separating film 21.Specifically, separation membrane 21 can be rubber membrane.Rubber
Glued membrane has preferable extensibility, pliability and crushing resistance, and different battery bags are simulated by the burst pressure for adjusting rubber membrane
Explosion phenomenon.
In other of the invention embodiments, as shown in Figure 1-Figure 3, first pressure table 60 and the are additionally provided with casing 10
Two pressure gauges 70, first pressure table 60 and second pressure table 70 are separately positioned on casing 10, the slow pressure of the correspondence of first pressure table 60
Test chamber 11, the corresponding blast analogue chamber 12 of second pressure table 70.That is, passing through first pressure table 60 and second pressure table 70
Monitor the pressure in slow pressure test chamber 11 and blast analogue chamber 12 respectively, the different air pressure of 30 pairs of Validity Test explosion-proof valve and blast
Response condition, to improve the security of battery anti-explosion test system 100.
In still other embodiments of the present invention, transparent observation window 13, observation window 13 and slow pressure are additionally provided with casing 10
The correspondence of test chamber 11.As shown in figure 1, observation window 13 is arranged on the side wall of casing 10, tester can be real by observation window 13
When observe separation membrane 21 explosion situation.
In the description of the invention, it is to be understood that term " on ", " under " ", bottom ", " interior ", " outer ", "front", "rear"
Deng instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of description the present invention and
Simplify description, rather than indicate or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration
And operation, therefore be not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine
Tool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not direct contact but by it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are directly over second feature and oblique upper, or be merely representative of
Fisrt feature level height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (10)
1. a kind of battery anti-explosion test system, it is characterised in that including：
Casing；
Partition component, the partition component is arranged in the casing and the housing interior volume is separated into slow pressure test chamber
With blast analogue chamber；
Explosion-proof valve, the explosion-proof valve is arranged on the casing and the correspondence slow pressure test chamber；
First gas-charging connection and the second gas-charging connection, first gas-charging connection are arranged on the casing and the correspondence slow pressure
Test chamber, second gas-charging connection is arranged on the casing and the correspondence blast analogue chamber；
Wherein described battery anti-explosion test system has slow pressure modes of inflation and simulated explosion pattern,
Wherein when the battery anti-explosion test system is in the slow pressure modes of inflation, by first gas-charging connection to institute
State slow pressure test interacvity air-filling and the partition component opens the slow pressure test chamber with the blast analogue chamber airtight partition；
When the battery anti-explosion test system is in the simulated explosion pattern, by second gas-charging connection to described quick-fried
Fried simulation interacvity air-filling simultaneously breaks through at least a portion of the partition component with simulated explosion.
2. battery anti-explosion test system according to claim 1, it is characterised in that the partition component includes：Described
Battery anti-explosion test system is in the separation membrane that can be broken through during the simulated explosion pattern.
3. battery anti-explosion test system according to claim 2, it is characterised in that the separation membrane is flexible separating film.
4. battery anti-explosion test system according to claim 3, it is characterised in that the separation membrane is rubber membrane.
5. battery anti-explosion test system according to claim 3, it is characterised in that the partition component also includes：Separate
Plate, fixed part, the demarcation strip are fixed in the casing, and demarcation strip through hole, the fixed part are provided with the demarcation strip
By the separation membrane be fixed on the demarcation strip and it is described separation membrane closure described in demarcation strip through hole.
6. battery anti-explosion test system according to claim 5, it is characterised in that the fixed part includes：Flange and spiral shell
Line fastener, the flange is set around the demarcation strip through hole, and the separation membrane is pressed on the demarcation strip by the flange
On, the threaded fastener is used to the flange being fixed on the demarcation strip.
7. battery anti-explosion test system according to claim 6, it is characterised in that the separation membrane includes：Central part and
Edge part, the edge part is set around the central part, and the edge part is pressed on the demarcation strip by the flange.
8. battery anti-explosion test system according to claim 7, it is characterised in that the central part is hemispherical.
9. battery anti-explosion test system according to claim 1, it is characterised in that the first pressure is additionally provided with the casing
Power table and second pressure table, the first pressure table and the second pressure table are separately positioned on the casing, and described first
The pressure gauge correspondence slow pressure test chamber, the second pressure table correspondence blast analogue chamber.
10. battery anti-explosion test system according to claim 1, it is characterised in that be additionally provided with the casing transparent
Observation window, the observation window with it is described it is slow pressure test chamber it is corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135852.5A CN106969980B (en) | 2017-03-08 | 2017-03-08 | Battery anti-explosion valve test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135852.5A CN106969980B (en) | 2017-03-08 | 2017-03-08 | Battery anti-explosion valve test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106969980A true CN106969980A (en) | 2017-07-21 |
| CN106969980B CN106969980B (en) | 2019-09-03 |
Family
ID=59329328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710135852.5A Active CN106969980B (en) | 2017-03-08 | 2017-03-08 | Battery anti-explosion valve test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106969980B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208441A (en) * | 2020-01-17 | 2020-05-29 | 恒大新能源汽车科技(广东)有限公司 | Battery testing device |
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| CN105845867A (en) * | 2016-03-25 | 2016-08-10 | 北京新能源汽车股份有限公司 | Explosion-proof valve for power battery case |
| CN205639741U (en) * | 2016-03-28 | 2016-10-12 | 新材料与产业技术北京研究院 | A relief valve and battery test equipment for battery test equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11204089A (en) * | 1998-01-19 | 1999-07-30 | Matsushita Electric Ind Co Ltd | Explosion-proof sealing apparatus for secondary battery |
| CN2909282Y (en) * | 2005-10-26 | 2007-06-06 | 中国北方车辆研究所 | Testing box for safety property of power battery of electric motor car |
| CN201576054U (en) * | 2009-12-31 | 2010-09-08 | 熊辉 | Cylinder-shaped lithium ion battery safety valve precision test device |
| CN202133516U (en) * | 2011-06-01 | 2012-02-01 | 福建亚亨动力科技集团有限公司 | Accumulator safety valve detecting apparatus |
| CN102508171A (en) * | 2011-11-14 | 2012-06-20 | 江苏环能通环保科技有限公司 | Device for detecting lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208441A (en) * | 2020-01-17 | 2020-05-29 | 恒大新能源汽车科技(广东)有限公司 | Battery testing device |
| CN111208441B (en) * | 2020-01-17 | 2022-04-19 | 恒大恒驰新能源汽车科技(广东)有限公司 | Battery testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106969980B (en) | 2019-09-03 |
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