CN207913049U - A kind of Vehicular dynamic battery experiment auxiliary extinguishing device - Google Patents
A kind of Vehicular dynamic battery experiment auxiliary extinguishing device Download PDFInfo
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- CN207913049U CN207913049U CN201721585213.0U CN201721585213U CN207913049U CN 207913049 U CN207913049 U CN 207913049U CN 201721585213 U CN201721585213 U CN 201721585213U CN 207913049 U CN207913049 U CN 207913049U
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- explosion cover
- extinguishing device
- pressure
- controller
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- 238000002474 experimental method Methods 0.000 title claims abstract description 27
- 238000004880 explosion Methods 0.000 claims abstract description 59
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 239000003921 oil Substances 0.000 claims description 26
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012019 product validation Methods 0.000 abstract description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 241001661355 Synapsis Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000009781 safety test method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model provides a kind of Vehicular dynamic battery experiment auxiliary extinguishing device, including testing stand, monitor station, anti-explosion cover, oil cylinder and vacuum pump, the monitor station for placing sample to be tested is equipped on the testing stand, it is equipped with anti-explosion cover in the surface of the testing stand, the oil cylinder is connected with anti-explosion cover, anti-explosion cover is driven to move up and down, the vacuum pump for extracting air in anti-explosion cover is equipped at the top of the anti-explosion cover, it is equipped with temperature sensor and pressure sensor in the anti-explosion cover, travel switch is equipped on the side wall of the anti-explosion cover.This ancillary test extinguishing device can be very good to react rapidly when failure reaction occurring during the test applied to battery cell, module; safety and environmental protection; efficiently the failure sample of burning is protected in time; analysis and research convenient for the later stage to sample, revision etc. of drafting that engineering developme experiment, Product Validation and Standard andRegulation are carried out for relevant departments provide sufficient technology and data supporting.
Description
Technical field
The utility model belongs to new-energy automobile experiment field, goes out more particularly, to a kind of Vehicular dynamic battery experiment auxiliary
Fiery device.
Background technology
In recent years, global video automobile market is just grown up at faster speed, and electric vehicle volume of production and marketing is obviously improved,
This depends on national governments and issues Development of Electric Vehicles strategy and state plan in succession, is further specified for industry development
Direction；Second is that power battery is paid much attention to, Innovation Input sharply increases, and the expection that electric vehicle engineering bottleneck is broken through is significantly
Enhancing；Third, national governments' increasing policy supporting dynamics, promotes electric vehicle industrialization with all strength；Fourth, pure electric automobile has benefited from
The development and application of high performance lithium ion battery, by the attention again of national governments and major motor corporation, industrialization pace is not
It is disconnected to accelerate.And country also increases support dynamics to this respect, and the five-year will be electric vehicle from development phase to industry
Change the critical period of step transition, and China's key that ev industry is run business big and strong 5 years.
However as one of electric automobile key parts, the test evaluation technology of lithium ion battery has obtained more and more
It is extensive, only lithium ion battery by can just ensure the sustainable and healthy development of lithium ion battery after tightened up test,
So some are tested due to battery certainly for the security test of lithium-ion battery monomer and module during test evaluation
Body structure characteristic, inevitably can there is a phenomenon where explosions on fire, then how more effectively safer implementation extinguishing method is more next
More cause the attention of testing agency.
Lithium ion battery carry out mandatory inspection when according to《GBT 31485-2015 power accumulator safety for electric vehicle
It is required that and test method》Carry out, in this standard, such as monomer module overcharge safety, cross put safety, squeeze, needle thorn, short circuit
Etc. be likely in test explosion on fire, then for how safely and fast this after battery during the experiment explosion on fire
Fire extinguishing be necessary.
At present in Prospect of EVS Powered with Batteries testing agency, for the place after battery during the test explosion on fire
Reason, which is generally used, buries sand, water spray, carbon dioxide extinguisher fire extinguishing etc., but in application process, above several processing
There are many defects for mode, for example there are pollution problems in fire extinguishing procedure, and security risk is easily caused to test equipment, can not preserve
Form after sample fails is unfavorable for analysis and research etc. of the later stage to sample.Therefore, research and development it is a kind of retain as possible failure sample and
Fast and safely effective Vehicular dynamic battery experiment auxiliary extinguishing device is a urgent problem to be solved.
Utility model content
In view of this, the utility model is directed to a kind of Vehicular dynamic battery experiment auxiliary extinguishing device, for electronic
Quick extinguishing after the failure of automobile power battery safety testing reduces the risk after sample test failure, to mechanism for testing
Equipment safety and late-run sample research staff have great importance to the integrity analysis for the sample that fails.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of Vehicular dynamic battery experiment auxiliary extinguishing device, including testing stand, monitor station, anti-explosion cover, oil cylinder and vacuum
Pump is equipped with the monitor station for placing sample to be tested on the testing stand, and anti-explosion cover is equipped in the surface of the testing stand,
The piston rod of the oil cylinder is connected with anti-explosion cover, and anti-explosion cover is driven to move up and down, when anti-explosion cover and testing stand contact, anti-explosion cover with
Testing stand forms confined space, the vacuum pump for extracting air in anti-explosion cover is equipped at the top of the anti-explosion cover, described explosion-proof
It is equipped with temperature sensor and pressure sensor in cover, travel switch is equipped on the side wall of the anti-explosion cover.When sample to be tested rises
After fire, when temperature reaches setting value, temperature sensor sends out alarm signal, and the anti-explosion cover of oil cylinder control at this time declines, and starts vacuum
Pump；When anti-explosion cover drops to designated position, travel switch is touched, and stops oil cylinder and anti-explosion cover declines；When anti-explosion cover internal pressure
When power arrives greatly setting value, pressure sensor sends out alarm signal, stops vacuum pump work.
Further, the present apparatus also can be used control unit and complete automation control.Described control unit includes temperature control
Device and pressure controller processed, the vacuum pump are connected with the terminal 17 of pressure controller, and the limit switch is connected on the circuit
In, the terminal 22 and terminal 23 of the pressure controller are connected with power cord, the end of the pressure sensor and pressure controller
Son 1, terminal 2 are connected, and the oil cylinder is connected with the terminal 17 of pressure controller, the terminal 17 and terminal 16 of the pressure controller
In normally off, the terminal 16 of the pressure controller is connected with the terminal 5 of temperature controller, the end of the temperature controller
Son 5 and terminal 4 are in normally open, and the terminal 4 of the temperature controller is connected with power cord L, the end of the temperature controller
Son 1 and terminal 2 are connected with power cord, and the temperature sensor is connected with the terminal 11 of temperature controller and terminal 12.Pass through temperature
The feedback of sensor and pressure sensor is spent to realize the linkage effect of anti-explosion cover and oil cylinder.
Further, scram button is equipped between the terminal 4 of the temperature controller and power cord L, when equipment occurs
When failure, scram button, arrestment work are pressed.
Further, the oil cylinder facilitates taking for sample to be tested by the lifting of rising button and declines button control cylinder
It puts.
Further, it is additionally provided with negative pressure easing valve on the anti-explosion cover, ensures experiment safety.
Further, it is equipped with seal gasket with testing stand touching position on the anti-explosion cover, ensures anti-explosion cover and experiment
Platform forms the leakproofness of confined space.
Further, the testing stand is U-shaped platform.
Further, the monitor station is T shape platforms.
Further, the oil cylinder is fixed in the rack by testing stand.
Further, the pressure sensor is that RS485 types spread silicon baroceptor.The temperature sensor is
PT100 type temperature sensors.The temperature controller is XMTG-7511 type intelligent temperature controllers.The pressure controller is
MPB-96 type intelligence diffused-silicon pressure control instruments.
Compared with the existing technology, the utility model Vehicular dynamic battery experiment auxiliary extinguishing device has the advantage that：
(1) this ancillary test extinguishing device is used and is automatically controlled, first moment cut-out test equipment after explosive is on fire
It with the power supply system of battery, avoids causing Danger Electric shock risk, personnel is avoided closely to put out a fire and cause unnecessary injury.
(2) this ancillary test extinguishing device vacuumizes anti-explosion cover after the ceiling capacity release of rear sample on fire, completely cuts off
Oxygen has quick extinguishing effect, and pollution-free.
(3) this ancillary test extinguishing device can be very good to lose during the test applied to battery cell, module
It can react rapidly when validity response, safety and environmental protection, efficiently in time protect the failure sample of burning, convenient for the later stage to sample
Analysis and research, revision etc. of drafting that engineering developme experiment, Product Validation and Standard andRegulation are carried out for relevant departments provides fully
Technology and data supporting.
Description of the drawings
The attached drawing for constituting the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The illustrative embodiments and their description of type are not constituted improper limits to the present invention for explaining the utility model.
In attached drawing：
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model control unit.
Reference sign：
1- oil cylinders；2- negative pressure easing valves；3- racks；4- vacuum pumps；5- temperature sensors；6- pressure sensors；7- strokes
Switch；8- seal gaskets；9-T shape platforms；10- anti-explosion covers；11-U shape platforms；12- pressure controllers；13- temperature controllers.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more this feature.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of Vehicular dynamic battery experiment auxiliary extinguishing device, including testing stand, monitor station, anti-explosion cover
10, oil cylinder 1 and vacuum pump 4, the testing stand are U-shaped platform 11, and the monitor station is T shapes platform 9.It is equipped on the U-shaped platform 11
T shapes platform 9 for placing sample to be tested is equipped with anti-explosion cover 10, the piston rod of the oil cylinder 1 in the surface of the U-shaped platform 11
It is connected with anti-explosion cover 10, anti-explosion cover 10 is driven to move up and down, the oil cylinder 1 is fixed in the rack 3 on 11 side of U-shaped platform.Anti-explosion cover
10 with U-shaped platform 11 when contacting, and anti-explosion cover 10 and U-shaped platform 11 form confined space, connect with U-shaped platform 11 on the anti-explosion cover 10
Synapsis is equipped with seal gasket 8, ensures that anti-explosion cover 10 forms the leakproofness of confined space with U-shaped platform 11.In the anti-explosion cover 10
Top is equipped with the vacuum pump 4 for extracting air in anti-explosion cover 10, and temperature sensor 5 and pressure sensing are equipped in the anti-explosion cover 10
Device 6 is equipped with travel switch 7 on the side wall of the anti-explosion cover 10, negative pressure easing valve 2 is additionally provided on the anti-explosion cover 10, protects
Demonstrate,prove experiment safety.The pressure sensor is that RS485 types spread silicon baroceptor, and the temperature sensor is PT100 type temperature
Sensor is spent, the temperature controller is XMTG-7511 type intelligent temperature controllers, and the pressure controller is MPB-96 type intelligence
Diffused-silicon pressure control instrument.
The present apparatus also can be used control unit and complete automation control.As shown in Fig. 2, described control unit includes temperature control
Device 13 and pressure controller 12 processed, the vacuum pump 4 are connected with the terminal 17 of pressure controller 12, and the limit switch 7 is connected
In the circuit, the terminal 22 and terminal 23 of the pressure controller 12 are connected with power cord, the pressure sensor 6 and pressure
Terminal 1, the terminal 2 of controller 12 are connected, and the oil cylinder 1 is connected with the terminal 17 of pressure controller 12, the pressure controller
12 terminal 17 and terminal 16 is in normally off, the terminal 16 of the pressure controller 12 and the terminal 5 of temperature controller 13
It is connected, the terminal 5 and terminal 4 of the temperature controller 13 are in normally open, the terminal 4 and power supply of the temperature controller 13
Line L is connected, and the terminal 1 and terminal 2 of the temperature controller 13 are connected with power cord, and the temperature sensor 5 is controlled with temperature
The terminal 11 of device 13 is connected with terminal 12.
When 220V circuits work normally, if temperature sensor 5 is in unexcited state, there is no electric current in entire circuit
It flows through, once temperature sensor 5 activates, signal can be sent out to the terminal 11,12 of temperature controller 13, temperature controller 13
Terminal 11,12 can be such that the terminal 4,5 of normally open is closed, and after terminal 4,5 is closed, the electric current that oil cylinder 1 is sent out can pass through pressure control
Device 12 processed is in the terminal 16,17 of normally off, the terminal 4,5 of 13 closed state of temperature controller is flowed to by the terminal, with electricity
Source is formed into a loop, and oil cylinder 1 is started to work.The vacuum pump 4 being in parallel at this time with oil cylinder 1 also begins to work.Oil cylinder 1 drops to centainly
When degree, anti-explosion cover 10 forms confined space with U-shaped platform 11, and travel switch is collided with U-shaped platform 11, is in the limit of normally off
Switch 7 is disconnected, and cuts off circuit.Vacuum pump 4 is due to pressure sensor 6 of connecting in the loop, when pressure reaches a timing, pressure
Sensor 6 can trigger the terminal 1,2 of pressure controller 12, and the terminal 1,2 of pressure controller 12 can make normally closed shape after obtaining signal
The terminal 16,17 of state disconnects, and vacuum pump 4 is stopped at this time.By the feedback of temperature sensor 5 and pressure sensor 6 come real
The linkage effect of existing anti-explosion cover 10 and oil cylinder 1.
The course of work of this example is as follows：
1. selecting sample size, size is sure not the specification more than anti-explosion cover.
2. sample is placed on the suitable position on T shapes platform 9, charge and discharge electric connection line is connected；
3. checking whether temperature sensor 5, pressure sensor 6 are intact；
4. anti-explosion cover 10 is adjusted to be suitble to highly by rise/fall button；
5. a pair sample is tested；
6. when temperature reaches setting value, temperature sensor 5 is triggered and sends out enabling signal to oil cylinder 1 and vacuum pump 4.
Oil cylinder 1 declines at this time, while anti-explosion cover 10 declines, and vacuum pump 4 starts.The travel switch when anti-explosion cover 10 drops to designated position
7 are touched, and oil cylinder 1 and anti-explosion cover 10 stop declining, and when pressure arrives setting value greatly in anti-explosion cover 10, pressure sensor 6 is touched
It sends out and transmits stop signal to vacuum pump 4, sample fire is waited for go out；
7. taking out sample, off-test.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device, it is characterised in that：Including testing stand, monitor station, anti-explosion cover, oil
Cylinder and vacuum pump are equipped with the monitor station for placing sample to be tested on the testing stand, are set right over the testing stand
There are anti-explosion cover, the oil cylinder to be connected with anti-explosion cover, anti-explosion cover is driven to move up and down, is equipped with to extract at the top of the anti-explosion cover and prevent
The vacuum pump of air in quick-fried cover is equipped with temperature sensor and pressure sensor, in the side of the anti-explosion cover in the anti-explosion cover
Wall is equipped with travel switch.
2. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 1, it is characterised in that：The present apparatus is adopted
Complete automation control with control unit, described control unit includes temperature controller and pressure controller, the vacuum pump with
The terminal (17) of pressure controller is connected, and limit switch is connected in the loop, the terminal (22) and terminal of the pressure controller
(23) it is connected with power cord, the pressure sensor is connected with the terminal (1) of pressure controller, terminal (2), the oil cylinder and pressure
The terminal (17) of force controller is connected, and the terminal (17) and terminal (16) of the pressure controller are in normally off, the pressure
The terminal (16) of force controller is connected with the terminal (5) of temperature controller, the terminal (5) and terminal (4) of the temperature controller
In normally open, the terminal (4) of the temperature controller is connected with power cord L, the terminal (1) of the temperature controller and end
Sub (2) are connected with power cord, and the temperature sensor is connected with the terminal (11) of temperature controller and terminal (12).
3. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 2, it is characterised in that：In the temperature
It spends between the terminal (4) and power cord L of controller equipped with scram button.
4. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 1 or 2, it is characterised in that：It is described
Oil cylinder by rising button and declines button control cylinder lifting.
5. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 1, it is characterised in that：Described anti-
Negative pressure easing valve is additionally provided on quick-fried cover.
6. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 1, it is characterised in that：Described anti-
On quick-fried cover seal gasket is equipped with testing stand touching position.
7. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 1, it is characterised in that：The experiment
Platform is U-shaped platform.
8. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 1, it is characterised in that：The detection
Platform is T shape platforms.
9. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 1, it is characterised in that：The oil cylinder
It is fixed in the rack by testing stand.
10. a kind of Vehicular dynamic battery experiment auxiliary extinguishing device according to claim 2, it is characterised in that：The pressure
Force snesor is that RS485 types spread silicon baroceptor, and the temperature sensor is PT100 type temperature sensors, the temperature
Controller is XMTG-7511 type intelligent temperature controllers, and the pressure controller is MPB-96 type intelligence diffused-silicon pressure controllers
Table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721585213.0U CN207913049U (en) | 2017-11-23 | 2017-11-23 | A kind of Vehicular dynamic battery experiment auxiliary extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721585213.0U CN207913049U (en) | 2017-11-23 | 2017-11-23 | A kind of Vehicular dynamic battery experiment auxiliary extinguishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207913049U true CN207913049U (en) | 2018-09-28 |
Family
ID=63613184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721585213.0U Active CN207913049U (en) | 2017-11-23 | 2017-11-23 | A kind of Vehicular dynamic battery experiment auxiliary extinguishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207913049U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107970540A (en) * | 2017-11-23 | 2018-05-01 | 中国汽车技术研究中心 | A kind of Vehicular dynamic battery experiment auxiliary extinguishing device |
-
2017
- 2017-11-23 CN CN201721585213.0U patent/CN207913049U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107970540A (en) * | 2017-11-23 | 2018-05-01 | 中国汽车技术研究中心 | A kind of Vehicular dynamic battery experiment auxiliary extinguishing device |
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Address after: 300300 Tianshan intersection of Cheng Linzhuang Road, Dongli District, Tianjin (south of Cheng Linzhuang Road) Patentee after: CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER Co.,Ltd. Address before: 300300 Tianshan intersection of Cheng Linzhuang Road, Dongli District, Tianjin (south of Cheng Linzhuang Road) Patentee before: CHINA AUTOMOTIVE TECHNOLOGY & RESEARCH CENTER |