CN117470321B - Multifunctional detection device for battery cooling plate - Google Patents

Multifunctional detection device for battery cooling plate Download PDF

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Publication number
CN117470321B
CN117470321B CN202311805068.2A CN202311805068A CN117470321B CN 117470321 B CN117470321 B CN 117470321B CN 202311805068 A CN202311805068 A CN 202311805068A CN 117470321 B CN117470321 B CN 117470321B
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CN
China
Prior art keywords
plate
detection
battery cooling
bottom plate
cooling plate
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Active
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CN202311805068.2A
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Chinese (zh)
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CN117470321A (en
Inventor
顾勇
李基伟
金毅
曹廷睿
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Wuxi Chengyong Automation Technology Co ltd
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Wuxi Chengyong Automation Technology Co ltd
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Priority to CN202311805068.2A priority Critical patent/CN117470321B/en
Publication of CN117470321A publication Critical patent/CN117470321A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention provides a multifunctional detection device for a battery cooling plate, which comprises: the main part support, the main part support openly is provided with detection tool, detection tool includes the bottom plate, and the bottom plate openly is provided with a plurality of detection slots, detection slot level sets up and in vertical direction equipartition arrangement, main part support internally mounted has withstand voltage measurement and control appearance and air tightness detector, withstand voltage measurement and control appearance and detection tool electric connection, air tightness detector passes through pipe connection with detection tool, main part inside one side is provided with the electric control panel, electric control panel and withstand voltage measurement and control appearance and air tightness detector electric connection. The invention provides a multifunctional detection device for a battery cooling plate, which can detect the air tightness, the insulativity and the voltage resistance of the battery cooling plate simultaneously through one-time clamping, can detect a plurality of cooling plates simultaneously, and improves the detection efficiency.

Description

Multifunctional detection device for battery cooling plate
Technical Field
The invention relates to the technical field of battery cooling plate detection, in particular to a multifunctional detection device for a battery cooling plate.
Background
The power battery of the new energy automobile needs to dissipate heat through a heat dissipation plate with a built-in water cooling system, the power battery cannot contact water, and the battery heat dissipation plate needs to have good air tightness to prevent leakage of cooling water; meanwhile, the battery cooling plate needs to have certain insulativity and voltage resistance to prevent the power battery from being shorted. Therefore, the battery cooling plate detects the air tightness, insulation and voltage resistance of the battery cooling plate when leaving the factory.
In the prior art, the air tightness, the insulativity and the voltage resistance are usually measured by separate air tightness detection equipment and voltage detection equipment respectively, two procedures are needed, and parts are needed to be clamped twice, so that the detection efficiency is affected. As disclosed in chinese patent publication CN 216012650U, an air tightness detecting device for a heat dissipating plate is provided, in which the air tightness of the heat dissipating plate is automatically detected by simply inserting both ends of the heat dissipating plate into the clamping grooves on both sides and then pressing the control button. The voltage withstanding test device for insulators can be used for testing insulativity and voltage resistance as disclosed in Chinese patent publication No. CN 213933919U. However, these two devices can only be used independently, and each device can only detect one heat dissipation plate at a time, which affects the detection efficiency.
Disclosure of Invention
The invention aims to provide a multifunctional detection device for a battery cooling plate, which can detect the air tightness, insulativity and voltage resistance of the battery cooling plate at one time, can detect a plurality of cooling plates at the same time and improves the detection efficiency.
A battery cooling plate multifunctional detection device, comprising: the main part support, the main part support openly is provided with detection tool, detection tool includes the bottom plate, and the bottom plate openly is provided with a plurality of detection slots, detection slot level sets up and in vertical direction equipartition arrangement, main part support internally mounted has withstand voltage measurement and control appearance and air tightness detector, withstand voltage measurement and control appearance and detection tool electric connection, air tightness detector passes through pipe connection with detection tool, main part inside one side is provided with the electric control panel, electric control panel and withstand voltage measurement and control appearance and air tightness detector electric connection.
Further preferably, the main body support is made of an aluminum alloy material, and the aluminum alloy material is low in density, light in weight, corrosion-resistant and attractive in visual effect.
Further preferably, the bottom plate is made of an insulating material, so that short-circuiting is prevented when insulation and voltage resistance tests are performed.
Further preferably, the number of the detection slots is 2-10.
Preferably, the detection slot comprises a fixed plate and a movable plate, the fixed plate is fixedly connected with the bottom plate, the movable plate is arranged above the fixed plate, the movable plate penetrates through the bottom plate and is in sliding connection with the bottom plate, and positioning pieces are arranged at two ends of the fixed plate. The detection slot is used for fixing the battery cooling plate, the fixing plate is used for placing the battery cooling plate locating piece and is used for limiting the position of the battery cooling plate, and the movable plate is used for clamping and fixing the battery cooling plate.
Further preferably, the fixed plate and the movable plate are made of insulating materials, so that short-circuiting is prevented when insulation and voltage resistance tests are performed.
Further preferably, one end of the positioning member is matched with the outline of the battery cooling plate.
Preferably, one end of the fixed bottom plate is provided with a sealing pressing plate cylinder, one side, close to the movable plate, of the sealing pressing plate cylinder is connected with a sealing pressing plate, a ventilation interface is arranged on the sealing pressing plate, and the ventilation interface is connected with the air tightness detector through a pipeline. The sealing pressing plate cylinder is used for pushing the sealing pressing plate, so that the ventilation interface is connected with the ventilation hole of the battery cooling plate, and the air tightness of the battery cooling plate is detected.
Preferably, a lower conductive sponge is attached below the movable plate, an upper conductive sponge is attached above the fixed plate, a first contact electrode and a second contact electrode are arranged on the fixed plate, the first contact electrode is electrically connected with the lower conductive sponge, and the first contact electrode and the second contact electrode are electrically connected with a voltage-resistant measurement and control instrument. The area of the upper conductive sponge and the area of the lower conductive sponge are larger than the area of the insulating coating of the battery cooling plate, the upper conductive sponge and the lower conductive sponge clamp the battery cooling plate and ensure that the coating of the battery cooling plate is completely attached to the upper conductive sponge and the lower conductive sponge, and the second contact electrode is connected with the metal body of the battery cooling plate without the insulating coating to form a circuit, so that the insulativity and the voltage resistance of the battery cooling plate are detected.
Preferably, the parts of the movable plates penetrating through the bottom plate are fixedly connected through connecting rods in the vertical direction. The movable plates are fixedly connected through the connecting rods and can synchronously move.
Preferably, a guide shaft is arranged on the back of the bottom plate, a linear bearing is arranged on the guide shaft, and the linear bearing is fixedly connected with the movable plate. The guide shaft is used for guiding the movement of the movable plate, and the linear bearing is convenient for the movable plate to slide on the guide shaft.
Preferably, the bottom plate at the back of the bottom plate is provided with a lifting cylinder, and the lifting cylinder is fixedly connected with the bottom plate of the lowest movable plate. The lifting cylinder pushes the lowest movable bottom plate, so that all the movable bottom plates are pushed to synchronously move.
Preferably, safety gratings are arranged on two sides of the front surface of the main body support. The safety grating can guarantee the safety of operators.
Preferably, the main part outside is connected with rotatory support arm, rotatory support arm end is provided with the touch-control screen, be provided with the warning light on the export screen, the main part outside is provided with the button box. The touch screen can control the device with the button box, and the device can report to the police through the warning light when the problem appears.
Preferably, the bottom of the main body is provided with casters. Casters facilitate movement of the device.
The beneficial effects are that:
1. the invention provides a multifunctional detection device for a battery cooling plate, which can detect the air tightness, the insulativity and the voltage resistance of the battery cooling plate simultaneously through one-time clamping, can detect a plurality of cooling plates simultaneously, and improves the detection efficiency.
2. In the prior art, the air tightness, the insulativity and the voltage resistance of the battery cooling plate are required to be detected by an air tightness detection device and a voltage detection device respectively, and parts are required to be repeatedly positioned and clamped, so that the inspection efficiency is affected. According to the invention, the detection jig is arranged, the voltage-resistant measurement and control instrument and the air tightness detector are combined, the detection of air tightness, insulativity and voltage resistance can be automatically completed only by one-time clamping, the two working procedures are combined into one, and the detection efficiency is improved; the battery cooling plate is placed in the detection groove of the detection jig to automatically complete positioning and clamping, the operation is simple, the battery cooling plate is positioned through the positioning block, the position of the battery cooling plate is limited, the battery cooling plate is prevented from moving transversely, the ventilation hole of the battery cooling plate can be accurately aligned to the ventilation interface of the sealing pressing plate, and the detection accuracy is improved.
3. The air tightness detection device and the voltage detection device in the prior art can only detect one battery cooling plate at a time, and the detection efficiency is low. The detection jig provided by the invention is provided with 8 detection slots, so that 8 battery cooling plates can be measured simultaneously, and the detection efficiency is higher. 8 movable plates for detecting the slots realize linkage through the connecting rods, and synchronously clamp 8 battery cooling plates, so that the clamping speed is high, the clamping force is the same, the control is accurate, and the test result is more accurate.
4. In the prior art, when the power supply detection device detects the insulativity and the voltage resistance of the battery cooling plate, only two points of the battery cooling plate are connected, the detection position is not accurate enough, and repeated measurement is needed. According to the invention, the battery cooling plate is tightly pressed by the upper conductive sponge and the lower conductive sponge, the conductive sponge has certain elasticity and can be fully contacted with the coatings on the upper surface and the lower surface of the battery cooling plate, if any conductive position of the upper coating of the battery cooling plate is incomplete, the detection result is more accurate, only one-time detection is needed, the measurement speed is higher, and meanwhile, the elasticity of the upper conductive sponge and the lower conductive sponge can disperse the clamping force on the battery cooling plate, so that the battery cooling plate is prevented from being extruded and deformed.
5. Safety gratings are arranged on two sides of the front surface of the main body support, so that the safety of operators can be ensured; the touch screen outside the main body is connected to the main body through the rotary support arm, so that the position of the touch screen can be freely adjusted, and the use is convenient.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic front view of a multifunctional detecting device for a battery cooling plate according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a back structure of an embodiment of a multifunctional detecting device for a battery cooling plate according to the present invention.
Fig. 3 is a schematic front view of a testing fixture of an embodiment of a multifunctional testing device for a battery cooling plate according to the present invention.
Fig. 4 is a schematic diagram of a reverse side of a testing fixture of an embodiment of a multifunctional testing device for a battery cooling plate according to the present invention.
Fig. 5 is an enlarged view of a detection slot of an embodiment of a multifunctional detection device for a battery cooling plate.
In the figure: the device comprises a 1-main body support, a 2-detection jig, a 21-bottom plate, a 3-detection groove position, a 31-fixed plate, a 32-movable plate, a 33-positioning piece, a 34-sealing pressing plate cylinder, a 35-sealing pressing plate, a 36-lower conductive sponge, a 37-upper conductive sponge, a 38-first contact electrode, a 39-second contact electrode, a 310-connecting rod, a 311-guiding shaft, a 312-linear bearing, a 313-lifting cylinder, a 4-withstand voltage measurement and control instrument, a 5-air tightness detector, a 6-electric control panel, a 7-safety grating, an 8-rotary support arm, a 9-touch screen, a 10-warning lamp, a 11-button box and 12-caster.
Detailed Description
The contents of the present invention can be more easily understood by referring to the following detailed description of preferred embodiments of the present invention and examples included. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, definitions, will control.
Example 1:
the invention provides a multifunctional detection device for a battery cooling plate, as shown in fig. 1-5, comprising: the main part support 1 openly is provided with detection tool 2, detection tool 2 includes bottom plate 21, bottom plate 21 openly is provided with 8 detection slots 3, detection slots 3 level sets up and the equipartition is arranged in vertical direction, main part support 1 internally mounted has withstand voltage measurement and control appearance 4 and air tightness detector 5, withstand voltage measurement and control appearance 4 and detection tool 2 electric connection, air tightness detector 5 passes through pipe connection with detection tool 2, inside one side of main part is provided with electric control panel 6, electric control panel 6 and withstand voltage measurement and control appearance 4 and air tightness detector 5 electric connection. The main body bracket 1 is made of an aluminum alloy material, and the aluminum alloy material has the advantages of low density, light weight, corrosion resistance and attractive visual effect. The bottom plate 21 is made of an insulating material, and prevents short-circuiting when performing insulation and voltage resistance tests.
The detection slot 3 comprises a fixed plate 31 and a movable plate 32, wherein the fixed plate 31 is fixedly connected with the bottom plate 21, the movable plate 32 is arranged above the fixed plate 31, the movable plate 32 penetrates through the bottom plate 21 and is in sliding connection with the bottom plate 21, and the fixed plate 31 and the movable plate 32 are made of insulating materials, so that short-circuiting during insulation and voltage resistance testing is prevented. The fixing plate 31 is provided at both ends with positioning members 33. One end of the positioning member 33 is fitted to the outline of the battery heat dissipation plate. The battery cooling plate is placed on the fixed plate 31 of the detection slot 3 and is positioned through the positioning block, so that the position of the battery cooling plate is limited, and the movable plate 32 compresses and fixes the battery cooling plate.
One end of the fixed bottom plate 21 is provided with a sealing pressure plate cylinder 34, one side of the sealing pressure plate cylinder 34, which is close to the movable plate 32, is connected with a sealing pressure plate 35, and a ventilation interface is arranged on the sealing pressure plate 35 and is connected with the air tightness detector 5 through a pipeline. The sealing pressing plate 35 and the air cylinder 34 push the sealing pressing plate 35, so that the ventilation interface is connected with the ventilation hole of the battery cooling plate, the air tightness of the battery cooling plate is detected, and the ventilation interface is communicated with the air tightness detector 5 for air tightness detection.
A lower conductive sponge 36 is attached below the movable plate 32, an upper conductive sponge 37 is attached above the fixed plate 31, a first contact electrode 38 and a second contact electrode 39 are arranged on the fixed plate 31, the first contact electrode 38 is electrically connected with the lower conductive sponge 36, and the first contact electrode 38 and the second contact electrode 39 are electrically connected with the voltage-resistant measurement and control instrument 4. The area of the upper conductive sponge 37 and the area of the lower conductive sponge 36 are larger than the area of the insulating coating of the battery cooling plate, the upper conductive sponge 37 and the lower conductive sponge 36 clamp the battery cooling plate and ensure that the coating of the battery cooling plate is completely attached to the upper conductive sponge 37 and the lower conductive sponge 36, and the second contact electrode 39 is connected with the metal body of the battery cooling plate without the insulating coating to form a circuit, so that the insulativity and the voltage resistance of the battery cooling plate are detected. If any conductive position of the coating on the battery cooling plate is incomplete, the detection result is more accurate, and the measurement speed is higher only by one-time detection.
The portions of the plurality of movable plates 32 passing through the bottom plate 21 are fixedly connected by the connecting rods 310 in the vertical direction. The back of the bottom plate 21 is provided with a guide shaft 311 which is vertically arranged, the guide shaft 311 is provided with a linear bearing 312, and the linear bearing 312 is fixedly connected with the movable plate 32. The bottom plate 21 is provided with a lifting cylinder 313 on the back surface thereof, and the lifting cylinder 313 is fixedly connected with the bottom plate 21 of the lowermost movable plate 32. The plurality of movable plates 32 are fixedly connected to be movable in synchronization by the connecting rod 310. The guide shaft 311 serves to guide the movement of the movable plate 32, and the linear bearing 312 facilitates the sliding of the movable plate 32 on the guide shaft 311. The lifting cylinder 313 pushes the lowermost movable floor 21, thereby pushing all the movable floors to move synchronously.
Safety gratings 7 are arranged on two sides of the front surface of the main body support 1. The safety grating 7 can guarantee the safety of operators.
The main part outside is connected with rotatory support arm 8, and rotatory support arm 8 end is provided with touch-control screen 9, is provided with warning light 10 on the export screen, and the main part outside is provided with button box 11. The touch screen 9 is electrically connected with the voltage-resistant measurement and control instrument 4 and the air tightness detector 5, can control the device with the button box 11, and displays the results of air tightness, insulativity and voltage resistance in the touch screen 9, and the air tightness device can give an alarm through the warning lamp 10 when a problem occurs.
The bottom of the main body is provided with casters 12. Casters 12 facilitate movement of the device.
Working principle: and 8 battery cooling plates are respectively placed in the detection groove position 3 and limited by the positioning blocks. According to the starting device, the cylinder pulls the movable plates 32,8 of the lowest detection slots 3, the movable plates 32 in the detection slots 3 form a whole through the connecting rod 310 and slide on the guide shaft 311 to synchronously press down, so that the battery cooling plates in the 8 detection slots 3 are fixed, and the upper conductive sponge 37 and the lower conductive sponge 36 fully contact the battery cooling plates. The sealing pressing plate 35 and the air cylinder 34 push the sealing pressing plate 35, so that the ventilation interface is connected with the ventilation hole of the battery cooling plate, the air tightness of the battery cooling plate is detected, the ventilation interface is communicated with the air tightness detector 5 for air tightness detection, and the air pressure is greater than a set threshold value, so that the air tightness detection is qualified. The detection result is displayed on the touch screen 9. The first contact electrode 38 and the second contact electrode 39 are connected with the voltage-resistant measuring and controlling instrument 4, the current in the formed circuit is detected, the current is smaller than a set threshold value, the insulation detection is qualified, the voltage is adjusted, whether the battery cooling plate can bear the set voltage value is detected, if no breakdown occurs, the voltage-resistant performance is qualified, and the detection result is displayed on the touch screen 9. After the detection is finished, the air cylinder 34 of the sealing pressing plate 35 returns to the original position, the lifting air cylinder 313 rises, the movable plate 32 is loosened, and the detected battery cooling plate is sequentially taken out from the jig, so that one-time detection is finished.

Claims (4)

1. The utility model provides a multi-functional detection device of battery heating panel which characterized in that includes: the main body support is internally provided with a voltage-resistant measurement and control instrument and an airtight detector, the voltage-resistant measurement and control instrument is electrically connected with the detection jig, the airtight detector is connected with the detection jig through a pipeline, and an electric control panel is arranged on one side of the inside of the main body and is electrically connected with the voltage-resistant measurement and control instrument and the airtight detector;
the detection groove comprises a fixed plate and a movable plate, the fixed plate is fixedly connected with the bottom plate, the movable plate is arranged above the fixed plate, the movable plate penetrates through the bottom plate and is in sliding connection with the bottom plate, and positioning pieces are arranged at two ends of the fixed plate;
one end of the fixed plate is provided with a sealing pressing plate cylinder, one side, close to the movable plate, of the sealing pressing plate cylinder is connected with a sealing pressing plate, a ventilation interface is arranged on the sealing pressing plate, and the ventilation interface is connected with the air tightness detector through a pipeline;
a lower conductive sponge is stuck below the movable plate, an upper conductive sponge is stuck above the fixed plate, a first contact electrode and a second contact electrode are arranged on the fixed plate, the first contact electrode is electrically connected with the lower conductive sponge, and the first contact electrode and the second contact electrode are electrically connected with a voltage-resistant measurement and control instrument;
the parts of the movable plates penetrating through the bottom plate are fixedly connected through connecting rods in the vertical direction;
the back of the bottom plate is provided with a guide shaft which is vertically arranged, the guide shaft is provided with a linear bearing, and the linear bearing is fixedly connected with the movable plate;
the lifting cylinder is arranged on the bottom plate on the back of the bottom plate and fixedly connected with the bottom plate of the lowest movable plate.
2. The multifunctional detection device for the battery cooling plate according to claim 1, wherein safety gratings are arranged on two sides of the front surface of the main body support.
3. The multifunctional detection device for the battery cooling plate according to claim 1, wherein the outer side of the main body is connected with a rotary support arm, a touch screen is arranged at the tail end of the rotary support arm, a warning lamp is arranged on the touch screen, and a button box is arranged on the outer side of the main body.
4. The multifunctional detecting device for the heat dissipation plate of the battery according to claim 1, wherein the bottom of the main body is provided with casters.
CN202311805068.2A 2023-12-26 2023-12-26 Multifunctional detection device for battery cooling plate Active CN117470321B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311805068.2A CN117470321B (en) 2023-12-26 2023-12-26 Multifunctional detection device for battery cooling plate

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Application Number Priority Date Filing Date Title
CN202311805068.2A CN117470321B (en) 2023-12-26 2023-12-26 Multifunctional detection device for battery cooling plate

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CN117470321B true CN117470321B (en) 2024-03-19

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN210741755U (en) * 2019-10-09 2020-06-12 中山市润烨新能源科技有限公司 Lithium battery cover plate has gas tightness detection tool of bilateral multistation
CN217156756U (en) * 2021-12-07 2022-08-09 嘉兴信鼎模具科技有限公司 Vehicle battery detection device
CN218240294U (en) * 2022-09-13 2023-01-06 浙江固驰电子有限公司 Device for batch insulating voltage-withstanding test of rectifier bridge
CN117192301A (en) * 2023-09-08 2023-12-08 昆山鸿志犀自动化机电设备有限公司 Integrated liquid cooling plate airtight insulation detection equipment and detection method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN210741755U (en) * 2019-10-09 2020-06-12 中山市润烨新能源科技有限公司 Lithium battery cover plate has gas tightness detection tool of bilateral multistation
CN217156756U (en) * 2021-12-07 2022-08-09 嘉兴信鼎模具科技有限公司 Vehicle battery detection device
CN218240294U (en) * 2022-09-13 2023-01-06 浙江固驰电子有限公司 Device for batch insulating voltage-withstanding test of rectifier bridge
CN117192301A (en) * 2023-09-08 2023-12-08 昆山鸿志犀自动化机电设备有限公司 Integrated liquid cooling plate airtight insulation detection equipment and detection method

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