CN108387286A - A kind of battery producing gas test device - Google Patents
A kind of battery producing gas test device Download PDFInfo
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- CN108387286A CN108387286A CN201710354239.2A CN201710354239A CN108387286A CN 108387286 A CN108387286 A CN 108387286A CN 201710354239 A CN201710354239 A CN 201710354239A CN 108387286 A CN108387286 A CN 108387286A
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- battery
- weight sensor
- producing gas
- test device
- weight
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000012545 processing Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000012546 transfer Methods 0.000 claims abstract description 3
- 230000008054 signal transmission Effects 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 8
- 238000010998 test method Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 14
- 230000008859 change Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000009784 over-discharge test Methods 0.000 description 1
- 238000009783 overcharge test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
To overcome the problems, such as that battery producing gas test method precision is low in the prior art, a kind of battery producing gas test device is provided, the accessory part of detection components, signal processing host and tool there are two electrode and for carrying out charge and discharge to battery is included；The detection components include holder, weight sensor and two fixtures for fixing battery；The weight sensor is connected to holder, and can be fixed relative to holder；Described two fixtures are electrically connected with two electrodes of accessory part respectively, two electrodes for two electrodes of battery to be respectively electrically connected to the accessory part；The fixture is connected to weight sensor simultaneously, and can be by the weight transfer of battery to the weight sensor, so that it generates weight signal；The signal processing host is connected to the weight sensor, and the weight signal that can be generated to the weight sensor handles and exports.Battery producing gas test device provided by the invention can be high to test process data automatic recording, precision.
Description
Technical field
The present invention relates to a kind of devices for battery producing gas test.
Background technology
In recent years, lithium ion battery is widely used in the fields such as mobile phone, computer and electric vehicle, and lithium ion battery has continuous
ETS estimated time of sailing is long, service life is long, self-discharge rate is low and it is environmentally protective the advantages that.
Lithium ion battery is carrying out the charge and discharge (surveys such as initial stage chemical conversion, overcharge, overdischarge, high temperature storage, high temperature circulation
Examination) it will produce gas in the process, gas generation can cause pole piece to expand and increase the internal resistance of cell, to the cyclicity to battery
Very big influence can be generated, the amount that gas generates is more, and the cycle performance of battery is poorer, capacity rapid decay, therefore right
The monitoring for the amount for generating gas in the test process such as lithium ion battery initial stage chemical conversion, overcharge, overdischarge, cyclic high-temperature storage is aobvious
It obtains particularly important.By monitoring gas production, the persons that preferably can not direct study carry out battery material and battery design excellent
Change and improves.
Common battery producing gas test method mainly has drainage and gas collection method.Drainage is submerged using in a reservoir
The volume of object in water is equal to liquid level and rises increased volume.But since the container volume of loading is larger, measured due to being put into
Liquid level rising variable quantity caused by object is limited, and error is larger；Gas collection method is to utilize TI calculators and baroceptor, by right
A certain amount of gas in isothermal variation pressure, volume measurement, and fitting function relationship, to measure not advising of being located therein
The then volume of shaped objects.But such method operation requires height, and there are certain measurement errors, in practical applications not
It is common.
Invention content
The technical problem to be solved by the present invention is to be asked for battery producing gas test method precision in the prior art is low
Topic, provides a kind of battery producing gas test device.
Battery producing gas test device provided by the invention include detection components, signal processing host and tool there are two electrode and
Accessory part for carrying out charge and discharge to battery；The detection components include holder, weight sensor and two for fixing
The fixture of battery；The weight sensor is connected to holder, and can be fixed relative to holder；Described two fixtures respectively with auxiliary
Two electrodes of component are electrically connected, two electrodes for two electrodes of battery to be respectively electrically connected to the accessory part；
The fixture is connected to weight sensor simultaneously, and can be by the weight transfer of battery to the weight sensor, so that it is generated
Weight signal；The signal processing host is connected to the weight sensor, and the weight that can be generated to the weight sensor
Signal is handled and exported.
It changes this phenomenon the present invention is based on volume after battery producing gas, will lead to electricity in conjunction with volume change in a liquid
The buoyancy that pond is subject to changes this mechanism, and creative proposes following aerogenesis measurement method：Battery before and after measurement aerogenesis
The difference (this difference buoyancy caused by volume change after aerogenesis changes and causes) of weight in a liquid, then with weight
Difference as the variable quantity of buoyancy before and after aerogenesis reversely extrapolate cell body product variable quantity.
Based on above-mentioned mechanism, battery producing gas test device provided by the present invention needs to accurately measure before and after battery producing gas
The difference of weight in a liquid.Under the above constitution, by above-mentioned two fixture fix battery, make battery not with other objects
(such as holding the container of liquid) contacts or interference, avoids being interfered by other external force.The weight of battery is transferred to by fixture
Weight sensor, by the weight and situation of change of weight sensor test battery in a liquid.Meanwhile two fixtures are respectively at electricity
Two electrodes in pond are electrically connected, and are electrically connected to the accessory part for promoting battery producing gas in turn.Pass through accessory part and electricity
Pond formed circuit, to battery carry out charge and discharge (tests such as initial stage chemical conversion, overcharge, overdischarge, high temperature circulation), make battery by
Gradually aerogenesis monitors the weight change that weight sensor measurement obtains during battery producing gas.
Also, battery producing gas test device provided by the invention can real-time data collection, and it is automatic to test process data
Record is convenient for subsequently to the processing of data, such as draws curve according to the relationship that the weight that test obtains changes over time, and is convenient for
The influence of further analysis voltage, current versus cell gas production.
Further, the detection components further include supporting part；The supporting part is set on the holder, the weight
Sensor is set on the supporting part.
Further, the holder includes bracket base and cradling piece；The holder is fixed in one end of the cradling piece
On pedestal；The supporting part is set on the cradling piece, and can be moved along the cradling piece and be taken up an official post in the cradling piece
Meaning position is fixed.
By above structure, supporting part can be fixed in any position of cradling piece, so as to according to cell shapes volume etc.
Condition adjusts battery location, to make test be carried out under optimal position.
Further, the supporting part includes supporting body and sensor connector port；The supporting body is set to the branch
On hack lever, and it can be moved along the cradling piece and any position is fixed on the cradling piece；The weight sensor setting
In on the supporting body；The sensor connector port is connected to the weight sensor, and as the weight sensor
Output port is connect with the signal processing host.
Further, the supporting part further includes leveling instrument；The leveling instrument is fixed on the supporting body.
By the way that above-mentioned leveling instrument is arranged, so that weight sensor is tested in most accurate position, avoid since position is askew
The problem of tiltedly leading to test result accuracy decline.
Further, the detection components further include the linking arm being connected with each other and two connecting rods；Described two connections
Bar is fixedly connected with described two fixtures respectively, and can the pulling force suffered by fixture be transferred to the linking arm；The connection
Arm is fixed on the weight sensor, and the pulling force for connecting rod to be subject to is transferred to weight sensor.
Further, described two connecting rods and described two fixtures are conductor；Described two connecting rods respectively with it is auxiliary
Two electrodes of component are helped to be electrically connected.
Further, described two connecting rods being set on the linking arm along vertical shift；The detection group
Part further includes two locking chucks；Described two locking chucks are sheathed on respectively in described two connecting rods, and are securable to institute
It states on linking arm, for described two connecting rods to be fixed on the linking arm.
It is conducive to the position of adjustment battery by the above results, is conducive to the progress of test.
Further, the signal processing host includes main case, display, signal processor；The signal processor
In main case, and signal processor is connect with the weight sensor and display, for transmitting weight sensor
Signal handled after be transmitted to the display, and weight readings are shown by display.
Further, the signal processing host further includes signal transmission device；At the signal transmission device and the signal
Device connection is managed, the signal for exporting signal processor is transmitted to fixed or mobile terminal by wired or wireless mode.
Description of the drawings
Fig. 1 is the stereogram of detection components in the battery producing gas test device that the preferred embodiment for the present invention provides；
Fig. 2 is the explosive view of detection components in the battery producing gas test device that the preferred embodiment for the present invention provides；
Fig. 3 is the stereogram of signal processing component in the battery producing gas test device that the preferred embodiment for the present invention provides.
Reference numeral in Figure of description is as follows：
10, detection components；
1011, bracket base；1012, cradling piece；1021, supporting body；1022, sensor connector port；1023, spiral shell is held out against
Silk；1024, leveling instrument；1031, weight sensor；1032, linking arm；1033, package；1041, connecting rod；1042, fixture；
1043, locking chuck；
20, signal processing host；
201, main case；2011, it switchs；2012, heat emission hole；202, signal processor；203, display；204, signal passes
Defeated device.
Specific implementation mode
In order to make the technical problems, technical solutions and beneficial effects solved by the present invention be more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness ",
The orientation of the instructions such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" or
Position relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without
It is instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore not
It can be interpreted as limitation of the present invention.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two
More than.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also can be indirectly connected through an intermediary the connection inside two elements to be to be connected directly.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The structure of the battery producing gas test device provided to the preferred embodiment for the present invention with reference to Fig. 1-Fig. 3 carries out detailed
It describes in detail bright.
The battery producing gas test device include detection components, signal processing host and for battery carry out charge and discharge it is auxiliary
Help component (not shown).
Figures 1 and 2 show that the structure of detection components 10.Specifically, the detection components 10 include holder, supporting part, again
Quantity sensor 1031, linking arm 1032,1033, two connecting rods 1041 of package and two fixtures 1042.
Holder includes bracket base 1011 and cradling piece 1012.Bracket base 1011 is used as substrate, ensures detection components 10
Stabilization.Cradling piece 1012 is vertically arranged, and one end is fixed on bracket base 1011.Commonly, routine can be used
The iron stand of chemical field is as holder.
Supporting part includes supporting body 1021, sensor connector port 1022, leveling instrument 1024 and two holds out against screw 1023.
Cradling piece 1012 is vertically arranged on the supporting body 1021, and supporting body 1021 can be along cradling piece 1012
Lower movement.Two holds out against screw 1023 are arranged in from horizontal direction on supporting body 1021, and the end of two holds out against screw 1023
Portion can press on cradling piece 1012.Known to a person skilled in the art, supporting body 1021 is moved to along cradling piece 1012
Then holds out against screw 1023 is tightened in target location, the end of holds out against screw 1023 is made to press on cradling piece 1012, you can realizes
The fixation of the target location on cradling piece 1012 of supporting body 1021.
Meanwhile leveling instrument 1024 is set on supporting body 1021.And two holds out against screw 1023 are setting up and down, pass through tune
The opposite tightness of two holds out against screw 1023 of section can realize leveling to a certain extent in conjunction with the instruction of leveling instrument 1024.
Sensor connector port 1022 is additionally provided on supporting body 1021, which is used for and signal
Processing host 20 is connected by data line, realizes the transmission of data.
Weight sensor 1031 is fixed on above-mentioned supporting body 1021.Weight sensor 1031 is connected to sensor connecting pin
Mouth 1022 passes through sensor connector port 1022 and data line is realized and the connection of signal processing host 20.
For ease of connecting and testing, above-mentioned linking arm 1032 is fixed in the horizontal direction on weight sensor 1031, is passed through
Linking arm 1032 extends outwardly, and is conducive to connect with battery.The above-mentioned linking arm 1032 being appreciated that is rigid body.
Package 1033 is connected with supporting body 1021, and weight sensor 1031 is encapsulated in inside package 1033,
It avoids influencing measuring accuracy due to maloperation or the interference of other objects.
Two connecting rods 1041 are vertically arranged on linking arm 1032.Two 1041 lower ends of connecting rod are respectively with two
A fixture 1042 is fixedly connected.
Locking chuck 1043 is arranged in two connecting rods 1041, also, two locking chucks 1043 are securable to institute
It states on linking arm 1032, by two locking chucks 1043, linking arm 1032 can be made to be fixed in two connecting rods 1041 not
Same position, you can adjust two fixtures 1042 and fix at various height.
In present embodiment, above-mentioned accessory part can be used it is conventional to battery carry out charge and discharge device, such as
The usual means of initial stage chemical conversion, volume test, overcharge test, overdischarge test, high temperature circulation test are carried out to battery.Auxiliary
It gradually only needs that battery can be made by aerogenesis when setup parameter progress charge and discharge.
Two electrodes of auxiliary device are electrically connected respectively at above-mentioned two connecting rod 1041.1041 He of above-mentioned two connecting rod
Two fixtures 1042 are conductor.Two fixtures 1042 respectively with two electrodes of battery fixation be electrically connected, to make battery and
Accessory part is formed into a loop.
Fig. 3 shows the structure of signal processing host 20.Specifically, the signal processing host 20 includes main case 201, letter
Number processor 202, display 203 and signal transmission device 204.
Signal processor 202 is set in main case 201, and signal processor 202 passes through data line and aforementioned sensing
Device connectivity port 1022 connects, and realizes the transmission of signal.
Display 203 is set on main case 201, and display 203 is connect with signal processor 202.Signal processing
The signal that device 202 is formed carries out weight data through display 203 and shows.
It may occur to persons skilled in the art that, above-mentioned weight sensor 1031 detects and through signal processor in
What 202 preliminary treatments obtained is weight data.Those skilled in the art can on this basis, to signal processor 202 or subsequently
Display terminal is adjusted, and inputs the dimensional parameters of battery, and modify to calculation procedure, and display 203 can be made directly defeated
Go out the battery volume change caused by aerogenesis.
Signal transmission device 204 is set on main case 201, and signal transmission device 204 is connect with signal processor 202,
Signal processor 202 formed signal can be wirelessly transferred by signal transmission device 204, realize on mobile terminals show
Show, personnel easy to operation are monitored test process in the case where leaving the theatre.
Main case 201 is equipped with the switch 2011 for controlling on/off.Meanwhile being further opened with use on main case 201
In the heat emission hole 2012 of heat dissipation.
Battery producing gas test method provided by the invention is illustrated with reference to the battery producing gas test device.
Test process preferably carries out under the conditions of 0~40 DEG C.Before test, battery is securely first clamped with two fixtures 1042,
And two fixtures 1042 is made to be electrically connected with two electrodes of battery, then adjust battery and for holding between the container of liquid
Position makes battery not interfered with container.
Then sensor connector port 1022 and the signal processor 202 of signal processing host 20 are connected using data line
It connects.Two connecting rods 1041 are respectively electrically connected on two electrodes of accessory part again.Then opening signal handles host 20
Switch, battery, liquid and entire test device are stood 20 minutes under environment to be measured or more so that its each section reaches
Environment temperature reduces influence of the temperature change to test result.
Finally liquid is poured into container, makes liquid-immersed battery.After whole system stabilization, records test at this time and open
Shown weight data M1 on time beginning and display 203, as the weight before battery producing gas in a liquid.
Entire test device is kept into current state, is then turned on accessory part, charge and discharge are carried out to battery.Wait for assisted group
After part is by the charge and discharge of the complete battery pair of preset condition, the weight number that display 203 is shown is checked by mobile terminal or scene
According to recording the weight data M2 of test.The difference of M2 and M1 is the difference of suffered buoyancy before and after battery producing gas at this time.
The parameters such as the density in conjunction with liquid calculate the volume change before and after battery producing gas.
Meanwhile above-mentioned battery producing gas test device can real-time data collection, such as record a data at interval of 6s, and it is right
Test process data automatic recording is convenient for subsequently to the processing of data, such as changed over time according to the weight that test obtains
Relationship draws curve, is convenient for the influence of further analysis voltage, current versus cell gas production.
In above-mentioned test process, according to liquid there is volatility, a container cover can be set on container, reduce liquid
It is influenced caused by volatilization.It should be understood that the setting of the container cover should ensure that two connecting rods 1041 without interference.
Test method provided by the invention is easy to operate, and precision is high, takes short.Used test device is simple in structure,
Easy to operation, measuring accuracy is high.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of battery producing gas test device, which is characterized in that including detection components (10), signal processing host (20) and have
Two electrodes and the accessory part for being used to carry out battery charge and discharge；
The detection components (10) include holder, weight sensor (1031) and two fixtures (1042) for fixing battery；
The weight sensor (1031) is connected to holder, and can be fixed relative to holder；
Described two fixtures (1042) are electrically connected with two electrodes of accessory part respectively, for distinguishing two electrodes of battery
It is electrically connected to two electrodes of the accessory part；The fixture (1042) is connected to weight sensor (1031) simultaneously, and can
By the weight transfer of battery to the weight sensor (1031), so that it generates weight signal；
The signal processing host (20) is connected to the weight sensor (1031), and can be to the weight sensor (1031)
The weight signal of generation is handled and exported.
2. battery producing gas test device according to claim 1, which is characterized in that the detection components (10) further include holding
Load portion；
The supporting part is set on the holder, and the weight sensor (1031) is set on the supporting part.
3. battery producing gas test device according to claim 2, which is characterized in that the holder includes bracket base
(1011) and cradling piece (1012)；One end of the cradling piece (1012) is fixed on the bracket base (1011)；
The supporting part is set on the cradling piece (1012), and can be along the cradling piece (1012) movement and in the branch
Any position is fixed on hack lever (1012).
4. battery producing gas test device according to claim 3, which is characterized in that the supporting part includes supporting body
(1021) and sensor connector port (1022)；
The supporting body (1021) is set on the cradling piece (1012), and can it is mobile along the cradling piece (1012) and
Any position is fixed on the cradling piece (1012)；
The weight sensor (1031) is set on the supporting body (1021)；Sensor connector port (1022) connection
To the weight sensor (1031), and as the output port of the weight sensor (1031) and the signal processing host
(20) it connects.
5. battery producing gas test device according to claim 4, which is characterized in that the supporting part further includes leveling instrument
(1024)；
The leveling instrument (1024) is fixed on the supporting body (1021).
6. the battery producing gas test device according to any one of claim 1-5, which is characterized in that the detection components
(10) further include linking arm (1032) and two connecting rods (1041)；
Described two connecting rods (1041) connect with the linking arm (1032)；
Described two connecting rods (1041) are fixedly connected with described two fixtures (1042) respectively, and can be suffered by fixture (1042)
To pulling force be transferred to the linking arm (1032)；
The linking arm (1032) is fixed on the weight sensor (1031), the pulling force for connecting rod (1041) to be subject to
It is transferred to weight sensor (1031).
7. battery producing gas test device according to claim 6, which is characterized in that described two connecting rods (1041) and institute
It is conductor to state two fixtures (1042)；
Described two connecting rods (1041) are electrically connected with two electrodes of accessory part respectively.
8. battery producing gas test device according to claim 6, which is characterized in that described two connecting rods (1041)
Along being set on the linking arm (1032) for vertical shift；
The detection components (10) further include two locking chucks (1043)；Described two locking chucks (1043) are sheathed on respectively
It on described two connecting rods (1041), and is securable on the linking arm (1032), is used for described two connecting rods
(1041) it is fixed on the linking arm (1032).
9. the battery producing gas test device according to claim 1-5,7, any one of 8, which is characterized in that the signal
It includes main case (201), display (203), signal processor (202) to handle host (20)；
The signal processor (202) is located in main case (201), and signal processor (202) and the weight sensor
(1031) it is connected with display (203), it is described for being transmitted to after being handled the signal that weight sensor (1031) transmits
Display (203), and weight readings are shown by display (203).
10. battery producing gas test device according to claim 9, which is characterized in that the signal processing host (20) is also
Including signal transmission device (204)；
The signal transmission device (204) connect with the signal processor (202), for export signal processor (202)
Signal is transmitted to fixed or mobile terminal by wired or wireless mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354239.2A CN108387286A (en) | 2017-05-18 | 2017-05-18 | A kind of battery producing gas test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354239.2A CN108387286A (en) | 2017-05-18 | 2017-05-18 | A kind of battery producing gas test device |
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| CN108387286A true CN108387286A (en) | 2018-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238232A (en) * | 2018-10-11 | 2019-01-18 | 深圳市北斗云信息技术有限公司 | Earth's surface inclinometer |
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| CN1877324A (en) * | 2006-07-12 | 2006-12-13 | 哈尔滨工业大学 | Automatic measuring device for volume change of concrete |
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| CN109238232A (en) * | 2018-10-11 | 2019-01-18 | 深圳市北斗云信息技术有限公司 | Earth's surface inclinometer |
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