CN109459196B - Automatic detection system for air tightness of battery pack - Google Patents
Automatic detection system for air tightness of battery pack Download PDFInfo
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- CN109459196B CN109459196B CN201811518514.0A CN201811518514A CN109459196B CN 109459196 B CN109459196 B CN 109459196B CN 201811518514 A CN201811518514 A CN 201811518514A CN 109459196 B CN109459196 B CN 109459196B
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- battery pack
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3209—Details, e.g. container closure devices
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- General Physics & Mathematics (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
An automatic battery pack airtightness detection system comprising: the device comprises an opening device station, a detection joint station, an air tightness detection device and a conveying device; at least two robot devices and a control device. The control device sends out an opening instruction: the starting manipulator grabs the starting tool from the starting device station and moves to the position above the battery pack stopped on the conveying device, the starting manipulator positions and acts to enable the sucker to cover the explosion-proof valve of the battery pack to vacuumize, the valve core of the explosion-proof valve is lifted up to be opened after the set vacuum degree is reached, the valve core is kept in an opening state, and the control device sends a detection instruction: the conveying device conveys the battery pack opened by the valve core to a preset position, the opening manipulator grabs the detection joint from the detection joint station and moves to the position above the battery pack stopped on the conveying device, the opening manipulator positions and acts to enable the detection joint to align to an explosion-proof valve of the battery pack to be detected, and the opening manipulator moves downwards and rotates to enable the connecting cover to cover a clamping groove of the explosion-proof valve to carry out air tightness detection.
Description
Technical Field
The invention relates to an air tightness checking system, in particular to an automatic detection system specially used for detecting air tightness of a battery pack.
Background
The new energy power battery pack is the heart of the new energy automobile, the power battery is used as a core component of the new energy automobile, and the safety and the working stability of the power battery pack are stable, and the reliability of the power battery pack directly affect the service performance and the safety of the new energy electric vehicle. In order to prevent the battery in the battery pack from being influenced by water, dust and the like, the battery pack box body needs to be sealed, and the waterproof and dustproof protection grade of the battery pack box body is required to reach or above the national standard GB4208-2008 shell protection grade (IP code) IP 67.
For the detection of the protection grade of the sealed box body, the test method and the requirement of the protection grade of IP67 and above are specifically specified in the GB4208-2008 standard: the dustproof test adopts the test of talcum powder in a dustproof test box, and the box body is required to be free from dust deposition after the test is finished; the waterproof test requires 1 meter of water immersion for at least 30 minutes. The method is characterized in that the method is carried out according to the standard method, the operation is complex, the time consumption is more, water and dust are adhered to the box body after detection, the cleaning and drying are needed, the treatment after detection is troublesome, the method is only suitable for sampling inspection, the requirement of rapid detection in the batch production process of the battery pack cannot be met, and therefore, in the industry, inflation or vacuumizing and pressure maintaining are adopted for a period of time in the batch production process, and then whether the box body is well sealed or not is verified by observing whether air leaks or not so as to verify the protection effect of.
In order to inflate or evacuate the battery pack case, the following methods are generally adopted at present:
(1) the method has the advantages that although the inflation detection speed is high, the box body needs to be provided with one more hole, the box body processing difficulty is increased, and in addition, after the inflation detection is qualified, a bolt is installed for secondary plugging and sealing, so the operation is troublesome.
(2) A clamp is used to cover the explosion-proof valve on the battery pack. A typical explosion-proof valve has a structure as shown in fig. 2, which includes a coupling ring 114 for coupling to an interface of a battery pack, and a valve body 111 disposed in the coupling ring 114, wherein a catching groove 112 is formed in the coupling ring 114, the valve body 111 is coupled and fixed to the coupling ring 114 by an elastic member such as a spring, and when the valve body 111 is lifted, a gap 113 is formed between a cover portion of the valve body and the coupling ring. A waterproof and breathable film is also arranged in the valve core. The explosion-proof valve on the battery package is lived to anchor clamps, aerifys or the evacuation detects in the ventilated membrane box through explosion-proof valve inside, but waterproof ventilated membrane ventilative volume is general less, and the gas velocity is very slow, and detection efficiency is low, to airtight detector testing result error of differential pressure method big, detects the judgement even because ventilative volume is too little time going, and if with the high pressure gas filled existence make waterproof ventilated membrane damage, lead to the risk of explosion-proof valve inefficacy.
Obviously, the above operations have the following risks or drawbacks:
(1) the box body is provided with the inflation hole, a bolt needs to be installed after inflation detection testing, secondary sealing is carried out, operation is complex, and the risk that the requirement of the protection level cannot be met or is difficult to be met due to poor secondary sealing exists.
(2) The ventilated membrane through the explosion-proof valve inflates or bleeds toward the box, and it is very slow to inflate or bleed, has the problem that detection efficiency is low to ventilated membrane ventilation volume is less, and is great with airtight detector test error of pressure differential, has the risk of great erroneous judgement, can not accurately detect even and judge battery package leakproofness.
(3) Aerify or evacuation from the ventilated membrane, if the misoperation, there is the risk that makes waterproof ventilated membrane damaged, leads to explosion-proof valve waterproof function to lose efficacy.
In addition, for a large number of production lines needing to be checked, the efficiency is low only by depending on manual operation, and the production requirements of large-batch battery packs after large-scale commercial sale of electric automobiles in the future are not met.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide an automatic airtightness detection system for a battery pack, which can rapidly and nondestructively open a valve body of an explosion-proof valve to communicate the battery pack with an airtightness detection apparatus through a gap formed after the valve body is lifted, and can also be conveniently, rapidly and detachably communicated with the explosion-proof valve of the battery pack to perform airtightness detection.
The invention provides an automatic tightness detection system for a battery pack, which is used for connecting an explosion-proof valve and a tightness detection device of the battery pack to detect the tightness of the battery pack under the condition of not damaging the battery pack, and is characterized by comprising the following components:
the opening device station is provided with at least one set of opening devices;
the detection joint station is provided with at least one detection joint;
the air tightness detection device is communicated with the detection joint through an air pipe;
the conveying device is used for conveying the battery pack to be detected;
at least two manipulator devices, namely an opening manipulator and a detection manipulator; and
a control device for controlling the operation of the motor,
wherein the opening device comprises an opening tool and a vacuum component with a gas switch and a vacuum source, the opening tool and the vacuum source are communicated through an air pipe,
the opening tool comprises:
the pull rod is of a hollow structure with a cavity, the tail end of the pull rod is provided with a joint, and the head end of the pull rod is provided with a mounting hole;
the sucker is provided with a connecting part and a trumpet-shaped sucker part, the connecting part is provided with a bayonet which is detachably arranged with the joint, the sucker part is used for covering the explosion-proof valve, the connecting part and the sucker part are provided with a communicated channel,
the detection joint comprises:
the connecting cover is barrel-shaped and is used for being sleeved on the explosion-proof valve;
the sealing cover is sleeved on the connecting cover and is used for being in sealing contact with the shell of the battery pack;
a connecting piece arranged on the sealing cover and used as an interface for being communicated with the air tightness detection device,
a communicating structure is arranged on the connecting cover and the sealing cover, the communicating structure enables the connecting piece to be communicated with the battery pack through the explosion-proof valve,
the control device sends out an opening instruction which controls the following actions:
the opening manipulator grabs the opening tool from the opening device station and moves to the position above the stopped battery pack on the conveying device,
the gas switch and the vacuum source are turned on to vacuumize the starting tool,
starting the manipulator for positioning and acting to enable the sucker to cover the explosion-proof valve of the battery pack for vacuumizing, lifting up to open the valve core of the explosion-proof valve after reaching the set vacuum degree, and keeping the valve core in an open state,
the control device issues a detection command that controls the following actions:
the conveying device conveys the battery pack with the opened valve core to a preset position,
starting a manipulator to grab the detection joint from the detection joint station and moving the manipulator to the position above the stopped battery pack on the conveying device,
the manipulator is started to position and act to enable the detection joint to align the anti-explosion valve of the battery pack to be detected, the manipulator moves downwards and rotates to enable the connecting cover to cover the clamping groove of the anti-explosion valve, the battery pack to be detected is connected with the air tightness detection device through the detection joint,
and the air tightness detection device works to detect the air tightness.
The automatic battery pack airtightness detection system provided by the present invention may further have a feature that the airtightness detection operation includes:
inflating the battery pack to be detected by using 3.5kpar air pressure for 450s, and stopping when the air pressure reaches 3.0-3.5 kpar;
stabilizing the pressure, and detecting whether the air pressure in the battery pack to be detected is within the range of 2.5-3.5 kpar after the duration of 60 s;
and detecting whether the leakage flow of the battery pack to be detected in 60s is in the range of-0.1 cc/min to 0.5cc/min after voltage stabilization.
The automatic air tightness detection system for the battery pack provided by the invention can also have the following characteristics:
wherein, the transmission device is also provided with an automatic mechanism for inserting the valve core blocking piece, the automatic mechanism inserts the valve core blocking piece into the valve core gap of the explosion-proof valve to block the valve core from resetting so as to keep the quick pressure relief channel of the explosion-proof valve open,
correspondingly, the starting manipulator resets to prepare for the next starting operation.
The automatic air tightness detection system for the battery pack provided by the invention can also have the following characteristics:
after the detection is finished, the control device sends out a reset instruction, and the instruction controls the following actions:
the operation of the air-tightness detecting device is stopped,
the manipulator is started to rotate reversely to loosen the connecting cover from the clamping groove of the explosion-proof valve, the connecting cover moves upwards to separate the detection joint from the battery pack to be detected,
the automatic mechanism acts to take down the valve core blocking piece.
The automatic air tightness detection system for the battery pack provided by the invention can also have the following characteristics:
wherein the set vacuum degree is-50 to-98 kPa.
The automatic battery pack airtightness detection system provided by the invention also has the following characteristics that:
the first sensor is arranged on the conveying device, and sends a signal to the control device when the battery pack to be detected is conveyed to the position corresponding to the opening manipulator, so that the control device sends an opening instruction,
and the second sensor is arranged on the conveying device, and sends a signal to the control device when the battery pack to be detected is conveyed to the position corresponding to the detection manipulator, so that the control device sends a detection instruction.
The automatic air tightness detection system for the battery pack provided by the invention can also have the following characteristics:
wherein, the interface at the tail end of the pull rod is in an inverted T shape,
correspondingly, the connecting part of the sucker is provided with a T-shaped groove which is a bayonet,
the joint of the pull rod is clamped into the groove of the connecting part of the sucker to be clamped and connected,
the wall of the part of the connecting part corresponding to the T-shaped groove is provided with a helical spring ring for clamping the joint which is snapped into the T-shaped groove.
The automatic air tightness detection system for the battery pack provided by the invention can also have the following characteristics:
wherein the sealing cover is sealed by the sealing ring and the shell of the battery pack,
wherein, the opening end of the sealing cover is provided with an annular groove,
a seal ring is secured within the annular groove.
The automatic air tightness detection system for the battery pack provided by the invention can also have the following characteristics:
the connecting cover and the sealing cover are respectively provided with communicating holes which are communicated with each other, the communicating holes are communicated structures, the connecting piece is arranged on the communicating holes of the sealing cover, the communicating holes are respectively arranged on the upper covers of the connecting cover and the sealing cover and are coaxially arranged, and the connecting piece penetrates through the two coaxially arranged communicating holes to be communicated with the inner space of the connecting cover.
The automatic air tightness detection system for the battery pack provided by the invention can also have the following characteristics:
wherein the connecting piece is a hollow screw rod,
the air tightness detection device is communicated with the hollow channel of the screw rod through an air pipe,
correspondingly, two communicating holes arranged on the connecting cover and the sealing cover are threaded holes, the head of the screw rod is provided with an internal threaded hole, and the internal threaded hole is communicated with the hollow channel of the screw rod.
Action and Effect of the invention
According to the automatic detection system for the air tightness of the battery pack, the corresponding opening device station for storing the opening device and the detection station for storing the joint for detection are arranged, the joint for detection is connected with the air tightness detection device, the conveying device is used for conveying the battery pack to be detected to the preset position, the opening manipulator is started to sequentially grab the opening tool in the opening device under the driving of the control instruction of the control device, the valve core of the explosion-proof valve of the battery pack is started, then the conveying device is controlled to convey the battery pack with the opened valve core to the next preset position, and then the detection manipulator is started to grab and detect the joint connected to the explosion-proof valve with the opened valve core, so that the battery pack is communicated with the air tightness detection device to perform air tightness detection.
The whole process is completely controlled by the command sent by the control device, programmed operation is carried out through the manipulator, the full inspection work of the battery pack can be continuously, standardizedly and quickly completed, and the future mass production requirements are met.
Drawings
FIG. 1 is a schematic diagram of an exemplary embodiment of an automatic tightness detection system for a battery pack;
FIG. 2 is a schematic structural diagram of an opening device according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of the removal of a test connection in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a connector in an embodiment of the present invention;
FIG. 5 is a schematic structural view of a seal cap in an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a valve core card in the embodiment; and
fig. 7 is a schematic diagram of an exemplary structure of the explosion-proof valve of the battery pack.
Detailed Description
In order to make the technical means, creation features, achievement purposes and effects of the present invention easy to understand, the following embodiments are specifically set forth for the automatic battery pack airtightness detection system of the family education management system of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the automatic air-tightness detecting system for battery pack according to the embodiment of the present invention.
As shown in fig. 1, the automatic tightness detecting system for a battery pack, which is used for connecting an explosion-proof valve and a tightness detecting device of the battery pack without damaging the battery pack, is characterized by comprising an opening device station 1, a detecting joint station 2, a tightness detecting device 3, a conveying device 4, a manipulator device and a control device 7.
The opening device station 1 is provided with at least one set of opening devices.
The joint station 2 for detection is provided with at least one joint for detection.
The air tightness detection device 3 is communicated with the detection joint through an air pipe.
And a conveying device 4 for conveying the battery pack to be detected.
At least two manipulator means, namely an opening manipulator 5 and a detection manipulator 6.
And a control device 7.
Fig. 2 is a schematic structural diagram of an opening device in an embodiment of the invention.
As shown in fig. 2, the opening device 100, including the opening tool 10, the vacuum assembly 20, and the buffer 30, are connected to each other through an air tube.
The opener 10 comprises a pull rod 11 and a suction cup 12.
The pull rod 11 is a hollow structure with a cavity, the tail end of the pull rod is provided with a joint, and the head end of the pull rod is provided with a mounting hole.
The cavity of the pull rod is cylindrical, the mounting opening of the pull rod is an internal threaded opening, and the outer diameter of the mounting opening is larger than that of the cavity of the pull rod. As shown in fig. 1, the air tube G is screwed and fitted into an internally threaded opening in the upper part of the tie rod in the figure by means of a threaded nipple J.
The interface at the tail end of the pull rod is in an inverted T shape and is used for being clamped into the connecting part of the sucker.
And the sucking disc 12 is provided with a connecting part and a trumpet-shaped sucking disc part, the connecting part and the sucking disc part are provided with communicated channels, the connecting part is provided with a bayonet which is detachably arranged with the joint, and the sucking disc part is used for covering the explosion-proof valve.
Correspondingly, the connecting part of the sucker is provided with a T-shaped groove which is a bayonet, and the joint of the pull rod is clamped into the groove of the connecting part of the sucker to be clamped and connected.
In this embodiment, as shown in fig. 1, the suction cup 12 has a circular bowl shape and is made of a flexible material, and the connection portion is disposed at a small end (i.e., an upper portion) of the suction cup. Preferably, the connecting portion and the suction cup portion are integrally formed, and the overall cross section is herringbone.
A vacuum assembly 20 having a gas switch 21 and a vacuum source. The gas switch is a manual valve, and preferably, a solenoid valve is used. The vacuum source is a vacuum pump or an air pump.
A buffer 30, shown as a container, is provided between the opener and the gas switch for buffering, in particular for intercepting the liquid drawn from the opener, preventing the liquid entrained in these battery packs from damaging the vacuum pump connected downstream.
The opener, the gas switch 21 and the vacuum source are in turn connected by a gas pipe, as shown in fig. 2, which is connected by a screw joint J.
In this embodiment, the vacuum assembly 20 and the buffer are fixedly disposed at the working station and communicate with the opening tool 10 through the air pipe.
Fig. 3 is a schematic view showing the detachment of the joint for inspection in the embodiment of the present invention.
Fig. 4 is a schematic structural view of a connector in an embodiment of the present invention.
The test tab 200 for connecting an explosion-proof valve of a battery pack and an air-tightness test device to test the air-tightness of the battery pack without damaging the battery pack, includes:
and the connecting cover 210 is barrel-shaped and is used for being sleeved on the explosion-proof valve. Specifically, as shown in fig. 3, at the open end of the cover, there is provided an inwardly protruding jaw 211 for rotatably fitting into a catch groove of the explosion-proof valve to be fixed.
A sealing cap 220 for sealing contact with the case of the battery pack, surrounding the connection cap;
a connection member 230 provided on the hermetic container as an interface for communicating with the airtightness detection apparatus,
wherein, be provided with the connectivity structure on connecting cover and sealed cowling, this connectivity structure makes the connecting piece be linked together through explosion-proof valve and battery package: that is, the connecting member is installed on the communicating structure provided on the connecting cover and the sealing cover, so that the connecting cover and the sealing cover are connected together, and the space of the connecting cover and the space of the outside are communicated through the connecting member.
The air tightness detection device 3 has set corresponding air charging and discharging processes and corresponding values to be measured according to the standard requirements of the test, and the air tightness detection program comprises the following steps:
inflating the battery pack to be detected by using 3.5kpar air pressure for 450s, and stopping when the air pressure reaches 3.0-3.5 kpar;
stabilizing the pressure, and detecting whether the air pressure in the battery pack to be detected is within the range of 2.5-3.5 kpar after the duration of 60 s;
and detecting whether the leakage flow of the battery pack to be detected in 60s is in the range of-0.1 cc/min to 0.5cc/min after voltage stabilization.
And judging whether the product is qualified or not according to the requirement.
The air tightness detection device 3, the conveying device 4 and the manipulator device are controlled by the control device:
the control device sends out an opening instruction which controls the following actions:
the opening manipulator grabs the opening tool from the opening device station and moves to the position above the stopped battery pack on the conveying device,
the gas switch and the vacuum source are turned on to vacuumize the starting tool,
starting the manipulator for positioning and acting to enable the sucker to cover the explosion-proof valve of the battery pack for vacuumizing, lifting up to open the valve core of the explosion-proof valve after reaching the set vacuum degree, and keeping the valve core in an open state,
the control device issues a detection command that controls the following actions:
the conveying device conveys the battery pack with the opened valve core to a preset position,
starting a manipulator to grab the detection joint from the detection joint station and moving the manipulator to the position above the stopped battery pack on the conveying device,
the manipulator is started to position and act to enable the detection joint to align the anti-explosion valve of the battery pack to be detected, the manipulator moves downwards and rotates to enable the connecting cover to cover the clamping groove of the anti-explosion valve, the battery pack to be detected is connected with the air tightness detection device through the detection joint,
the air tightness detection device works to detect the air tightness, and tests and judges according to the air tightness detection program.
Example 2
On the basis of the embodiment 1, the conveying device is also provided with an automatic mechanism for inserting the valve core blocking piece, the automatic mechanism inserts the valve core blocking piece into the valve core gap of the explosion-proof valve to block the valve core from resetting so as to keep the quick pressure relief channel of the explosion-proof valve open, and correspondingly, the opening manipulator resets to prepare for the next opening operation. The automatic mechanism may be hydraulic or electromagnetic powered.
Example 3
On the basis of the above embodiment 2, when the detection is completed, the control device issues a reset instruction that controls the following actions:
the operation of the air-tightness detecting device is stopped,
the manipulator is started to rotate reversely to loosen the connecting cover from the clamping groove of the explosion-proof valve, the connecting cover moves upwards to separate the detection joint from the battery pack to be detected,
the automatic mechanism acts to take down the valve core blocking piece.
Example 4
On the basis of the above embodiments 1 to 3, the automatic system further includes, for the accuracy of positioning:
the first sensor 8 is arranged on the conveying device, and when the battery pack to be detected is conveyed to the position corresponding to the opening manipulator 5, a signal is sent to the control device, and the control device sends an opening instruction;
and the second sensor 9 is arranged on the conveying device, and when the battery pack to be detected is conveyed to the position corresponding to the detection manipulator 6, a signal is sent to the control device, and the control device sends a detection instruction.
Example 5
On the basis of the above embodiment, the suction cup part in the shape of a circular bowl is verified according to multiple tests, and the size of the suction cup is selected
And are combined with
The suction force of the air pipe for controlling the flow can be kept just larger than 20N, under the condition, the vacuum degree of the vacuum pump is proper at minus 50 to minus 98kPa, the opening effect is good, the cover plate of the explosion-proof valve can be just opened by the force, the cover plate is not damaged, the opening speed is high, and the efficiency is high.
Example 6
Further, on the basis of the embodiment, a spiral spring ring is arranged in the wall of the connecting part of the suction cup corresponding to the T-shaped groove for clamping the joint clamped into the T-shaped groove.
Because the sucking disc is the vulnerable part of deformation many times, belongs to the consumptive material, needs to change many times, and the change in-process can make the inner wall mode of falling T shape recess and can not zonulae occludens even make sealed inefficacy, buries a spiral spring circle underground in the wall at this position of the above-mentioned easy wearing and tearing of sucking disc through the rubber material and strengthens the dynamics of its chucking, prolongs the life of sucking disc, strengthens sealed effect.
The operation process of opening the explosion-proof valve of the battery pack using the nondestructive opening tool of the battery pack of the embodiment is briefly described as follows:
when detecting power battery package gas tightness, the vacuum source is opened, at first open gas switch and come the evacuation, place opener's sucking disc on explosion-proof valve case 111 lateral surface and contact and inhale tightly, open the handheld pull rod of machinery and lift upwards, open case 111's apron and make clearance 113 appear between apron and the connecting ring, make explosion-proof valve through quick pressure release passageway and external intercommunication in inserting case separation blade or other similar flakiness into clearance 113 after that, can carry out the gas tightness with connecting gas tightness detection device this moment.
Example 7
On the basis of the embodiment 1, the connecting cover and the sealing cover are respectively provided with communicating holes which are communicated with each other, the communicating holes are communicated structures, and the connecting piece is arranged on the communicating holes of the sealing cover.
Correspondingly, the connecting member is a hollow rod, which is fixed and communicated by being inserted through the communication holes K on the connecting cover and the sealing cover. In this case, the airtightness detection means communicates with the outside through the hollow rod.
Example 8
In addition to the embodiment 2, the communication holes are respectively arranged on the upper covers of the connecting cover and the sealing cover and are coaxially arranged, and preferably, as shown in fig. 2, the communication holes are arranged at the center (circle center) positions of the cylindrical connecting cover and the cylindrical sealing cover.
Example 9
On the basis of the above embodiments 1, 2 or 3, the two communication holes provided in the connecting cover and the sealing cover are both screw holes, and correspondingly, the connecting member is a hollow screw rod, and the screw rod is screwed into and penetrates through the communication screw holes in the connecting cover and the sealing cover to be fixed and communicated.
As shown in fig. 2 and 3, preferably, the screw has a head 230 with an internally threaded hole 2301, which is in communication with the hollow channel of the screw, and the air tube is connected to the internally threaded hole of the screw by an air tube quick coupling J having a thread.
Fig. 5 is a schematic structural view of a seal cap in an embodiment of the present invention.
Example 10
The above embodiments 1 to 9 are all compression-sealed on the outer case of the battery pack by compressing between the sealing caps 220, and as a preferable example, as shown in fig. 2 and 5, compression-sealing is performed by providing the sealing ring H between the sealing caps 220 and the outer case of the battery pack.
Further, for convenience of mounting and sealing, as shown in fig. 4, an annular groove 2201 is provided at the open end of the seal cover, and the seal ring is fixed in the annular groove.
Fig. 6 is a schematic structural diagram of a valve core card in the embodiment.
Example 11
As an optional match, can use the card to insert between the apron and the clamping ring of case, make the battery package take out through the quick pressure release passageway of the gap formation between apron and the clamping ring, exhaust, thereby make and aerify or bleed speed and accelerate, promote detection efficiency, so this embodiment still provides a case card (case separation blade) as figure 6, be arranged in inserting the case clearance of explosion-proof valve and block the case and reset and then make the quick pressure release passageway of explosion-proof valve keep opening, it becomes 7 fonts, the head is opened at the case and is gone into after exposing the gap. Specifically, the thickness of the valve core baffle is 0.5-5mm, and the thickness of the valve core baffle is preferably 1-3 mm.
The cover of the valve cartridge 111 is opened using an opener: and opening the gas valve to cover the suction disc on the valve core of the explosion-proof valve, lifting the pull rod to open the valve core to expose the pressure relief gap, keeping the valve core in an open state, enabling a gap 113 to appear between the cover plate and the connecting ring, and then inserting a valve core blocking piece or other similar sheet-shaped objects into the gap 113 to enable the explosion-proof valve to be communicated with the outside through a quick pressure relief channel.
Then, the connecting cover is rotationally clamped into a clamping groove of the explosion-proof valve to be fixed: the opening end of the connecting cover is provided with a claw which protrudes inwards, the claw is used for being rotatably sleeved into a clamping groove of the explosion-proof valve and fixed, and the claw on the connecting cover is clamped into the clamping groove of the explosion-proof valve and fixed.
The sealing cover covers the connecting cover and is aligned with the communicating threaded hole, and the screw is screwed in to compress the sealing cover and the rubber sealing ring of the battery pack shell to realize compression sealing.
The use of the screwed trachea quick connector J connects the trachea with the internal thread hole 2301 of the screw rod, after opening the airtight detection device, the gas passes through the trachea, the connecting piece, the pressure relief gaps of the two intercommunicating pores of the connecting cover and the sealing cover and the explosion-proof valve, and the quick pressure relief channel enters the battery pack, namely, the airtight detection device and the battery pack are communicated, so that the battery pack is pumped out and exhausted through the quick pressure relief channel formed by the gap between the cover plate and the connecting ring.
After the detection of the air tightness detection device is finished, the sealing cover is rotated and the detection joint is disassembled, so that the valve core is automatically reset to keep the explosion-proof valve in a sealing state.
Effects and effects of the embodiments
According to the automatic detection system for the air tightness of the battery pack, the corresponding opening device station for storing the opening device and the detection station for storing the joint for detection are arranged, the joint for detection is connected with the air tightness detection device, the conveying device is used for conveying the battery pack to be detected to the preset position, the opening manipulator is started to sequentially grab the opening tool in the opening device under the driving of the control instruction of the control device, the valve core of the explosion-proof valve of the battery pack is started, then the conveying device is controlled to convey the battery pack with the opened valve core to the next preset position, and then the detection manipulator is started to grab and detect the joint connected to the explosion-proof valve with the opened valve core, so that the battery pack is communicated with the air tightness detection device to perform air tightness detection.
The whole process is completely controlled by the command sent by the control device, programmed operation is carried out through the manipulator, the full inspection work of the battery pack can be continuously, standardizedly and quickly completed, and the future mass production requirements are met.
Because the connecting cover can be sleeved and fixed on the connecting ring of the explosion-proof valve, the sealing cover can be sleeved and pressed on the shell of the battery pack to seal, and the connecting piece for communicating the sealing cover and the connecting cover is used as an interface for communicating with the outside, when in connection and disassembly, the connecting cover only needs to be sleeved on the connecting ring of the explosion-proof valve, and then the sealing cover is installed to realize that the interface is fixed on the explosion-proof valve and communicated with the battery pack. When the joint is used, the joint is very convenient to detach, install and use.
And because the card can be inserted between the cover plate and the connecting ring of the valve core, the battery pack can be pumped and exhausted through the quick pressure relief channel formed by the gap between the cover plate and the connecting ring, so that the inflation or air pumping speed is increased, and the detection efficiency is improved.
Further, because use the sucking disc to hold the apron of explosion-proof valve, then through lifting the pull rod, open the case to make things convenient for subsequent gas tightness detection device directly to be linked together with the battery package, according to the area of sucking disc and the answer elasticity of case in the use, can correspond and calculate the vacuum that the sucking disc was vacuumized, thereby guarantee can the firm valve core of mentioning of inhaling, can not the dynamics again too big and damage case, waterproof ventilation membrane even. Specifically, the explosion-proof valve that this harmless opening tool was used for opening battery package has following advantage:
1. the opening tool has simple structure, quick installation and disassembly and simple operation and use;
2. the opening tool is used for opening the valve core of the explosion-proof valve without additionally arranging an inflation detection hole on the box body, and the air tightness detection device can rapidly release pressure through a gap between the valve core and the connecting ring to inflate or exhaust air through a channel, so that the speed is high, and the detection efficiency is high;
3. can know by above 2 nd point, gaseous not through the waterproof ventilated membrane in the explosion-proof valve during the detection, effectively prevent the maloperation in advance, can reduce and avoid even to answer the pressure regulation improper, the too big waterproof ventilated membrane damage that leads to of pressure, the problem of waterproof function inefficacy.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (10)
1. An automatic airtightness detection system for a battery pack, which is used for connecting an explosion-proof valve and an airtightness detection device of the battery pack to detect airtightness of the battery pack without damaging the battery pack, comprising:
the opening device station is provided with at least one set of opening devices;
the detection joint station is provided with at least one detection joint;
the air tightness detection device is communicated with the detection joint through an air pipe;
a transfer device for transferring the battery pack;
at least two manipulator devices, namely an opening manipulator and a detection manipulator; and
a control device for controlling the operation of the motor,
wherein the starting device comprises a starting tool and a vacuum component with a gas switch and a vacuum source, the starting tool and the vacuum source are communicated through a gas pipe,
the opener tool comprises:
the pull rod is of a hollow structure with a cavity, the tail end of the pull rod is provided with a joint, and the head end of the pull rod is provided with a mounting hole;
the sucker is provided with a connecting part and a trumpet-shaped sucker part, the connecting part is provided with a bayonet which is detachably arranged with the joint, the sucker part is used for covering the explosion-proof valve, the connecting part and the sucker part are provided with communicated channels,
the detection joint includes:
the connecting cover is barrel-shaped and is used for being sleeved on the explosion-proof valve;
the sealing cover is sleeved on the connecting cover and is used for being in sealing contact with the shell of the battery pack;
a connecting piece arranged on the sealing cover and used as an interface for communicating with the air tightness detection device,
a communication structure is arranged on the connecting cover and the sealing cover, the communication structure enables the connecting piece to be communicated with the battery pack through the explosion-proof valve,
the control device sends out an opening instruction which controls the following actions:
the opening manipulator grabs the opening tool from the opening device station and moves to the position above the battery pack stopped on the conveying device,
the gas switch and the vacuum source are turned on to vacuumize the starting tool,
the starting manipulator is positioned and acts to enable the sucker to cover the explosion-proof valve of the battery pack for vacuumizing, the valve core of the explosion-proof valve is lifted up to be opened after the set vacuum degree is reached, the valve core is kept in an opening state,
the control device issues a detection command that controls the following actions:
the conveying device conveys the battery pack with the opened valve core to a preset position,
the opening manipulator grabs the detection joint from the detection joint station and moves to the position above the battery pack stopped on the conveying device,
the starting manipulator is positioned and acts to enable the detection joint to align to the anti-explosion valve of the battery pack, the starting manipulator moves downwards and rotates to enable the connecting cover to cover the clamping groove of the anti-explosion valve, the battery pack is connected with the air tightness detection device through the detection joint,
and the air tightness detection device works to detect the air tightness.
2. The automatic battery pack airtightness detection system according to claim 1, wherein the operation of airtightness detection comprises:
inflating the battery pack by using 3.5kpar air pressure for 450s, and stopping when the air pressure reaches 3.0-3.5 kpar;
stabilizing the pressure, and detecting whether the air pressure in the battery pack is within the range of 2.5-3.5 kpar after the duration of 60 s;
and detecting whether the leakage flow of the battery pack to be detected in 60s is in the range of-0.1 cc/min to 0.5cc/min after voltage stabilization.
3. The automatic battery pack airtightness detection system according to claim 1, wherein:
wherein, the conveying device is also provided with an automatic mechanism for inserting the valve core blocking piece, the automatic mechanism inserts the valve core blocking piece into the valve core gap of the explosion-proof valve to block the valve core from resetting so as to keep the quick pressure relief channel of the explosion-proof valve open,
correspondingly, the starting manipulator resets to prepare for the next starting operation.
4. The automatic battery pack airtightness detection system according to claim 3, wherein:
after the detection is finished, the control device sends out a reset instruction, and the instruction controls the following actions:
the operation of the air-tightness detecting device is stopped,
the opening manipulator rotates reversely to loosen the connecting cover from the clamping groove of the explosion-proof valve, moves upwards to separate the detection joint from the battery pack,
the automatic mechanism acts to take down the valve core blocking piece.
5. The automatic battery pack airtightness detection system according to claim 1, wherein:
wherein the set vacuum degree is-50 to-98 kPa.
6. The automatic battery pack airtightness detection system according to claim 5, further comprising:
a first sensor arranged on the conveying device, and sending a signal to the control device when the battery pack is conveyed to a position corresponding to the opening manipulator, and the control device sends the opening instruction,
and the second sensor is arranged on the conveying device, and when the battery pack is conveyed to a position corresponding to the detection manipulator, a signal is sent to the control device, and the control device sends the detection instruction.
7. The automatic battery pack airtightness detection system according to claim 1, wherein:
wherein, the interface at the tail end of the pull rod is in an inverted T shape,
correspondingly, the connecting part of the sucker is provided with a T-shaped groove which is a bayonet,
the joint of the pull rod is clamped into the groove of the connecting part of the sucker to be connected in a clamping way,
and a spiral spring ring is arranged in the wall of the part of the connecting part corresponding to the T-shaped groove and used for clamping the joint clamped into the T-shaped groove.
8. The automatic battery pack airtightness detection system according to claim 7, wherein:
wherein the sealing cap is sealed by a sealing ring and a case of the battery pack,
wherein, the opening end of the sealing cover is provided with an annular groove,
the sealing ring is secured within the annular groove.
9. The automatic battery pack airtightness detection system according to claim 8, wherein:
the connecting cover and the sealing cover are respectively provided with communicating holes which are communicated with each other, the communicating holes are the communicating structures, the connecting piece is arranged on the communicating holes of the sealing cover, the communicating holes are respectively arranged on the connecting cover and the upper cover of the sealing cover and are coaxially arranged, and the connecting piece penetrates through the two coaxially arranged communicating holes to be communicated with the inner space of the connecting cover.
10. The automatic battery pack airtightness detection system according to claim 7, wherein:
wherein the connecting piece is a hollow screw rod,
the air tightness detection device is communicated with the hollow channel of the screw through an air pipe,
correspondingly, two communicating holes arranged on the connecting cover and the sealing cover are threaded holes, the head of the screw is provided with an internal threaded hole, and the internal threaded hole is communicated with the hollow channel of the screw.
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| CN110082047B (en) * | 2019-04-15 | 2021-12-14 | 合肥国轩高科动力能源有限公司 | Upper cover plate compression protection device for lithium battery pack sealing test |
| CN112113730A (en) * | 2019-06-20 | 2020-12-22 | 中车时代电动汽车股份有限公司 | Battery pack protection detection device and method, control cabinet and data transmission method |
| CN110278703B (en) * | 2019-07-19 | 2024-05-31 | 格力电器（武汉）有限公司 | Remote controller battery cover detection device, system and method |
| CN111929002A (en) * | 2020-07-17 | 2020-11-13 | 东风时代(武汉)电池系统有限公司 | Battery package gas tightness test fixture and system |
| CN111811759B (en) * | 2020-07-22 | 2023-01-10 | 海信冰箱有限公司 | Vacuum box detection device and detection method |
| CN112213043B (en) * | 2020-10-16 | 2023-09-22 | 芜湖市元山机械制造有限公司 | Battery pack air density detection equipment |
| CN112611523B (en) * | 2020-12-22 | 2024-06-11 | 芜湖奇达动力电池系统有限公司 | New energy automobile battery pack tightness test method |
| CN113607354A (en) * | 2021-08-26 | 2021-11-05 | 蜂巢能源科技有限公司 | Battery pack air tightness detection method and detection system |
| CN113820056B (en) * | 2021-09-29 | 2024-05-14 | 歌尔科技有限公司 | Pressure detecting device |
| CN113834606B (en) * | 2021-11-26 | 2022-03-01 | 苏州英特模汽车科技有限公司 | Test system for plugging air tightness explosion-proof valve of lithium battery pack |
| CN116799422B (en) * | 2023-08-23 | 2024-01-26 | 江西五十铃汽车有限公司 | Driving safety guarantee device for new energy automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003166894A (en) * | 2001-11-29 | 2003-06-13 | Keihin Rika Kogyo:Kk | Gas leakage detection device |
| CN103616143A (en) * | 2013-11-25 | 2014-03-05 | 河南福森新能源科技有限公司 | Air tightness detecting device for cylindrical cell |
| CN108533811A (en) * | 2018-04-23 | 2018-09-14 | 东莞蒲微防水透气膜材料有限公司 | A kind of explosion-proof valve and detection method for inflating spool, fast aeration detection box body tightness |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102179683B1 (en) * | 2016-10-25 | 2020-11-17 | 주식회사 엘지화학 | Method Capable of Easily Checking Defect of Battery Pack |
-
2018
- 2018-12-12 CN CN201811518514.0A patent/CN109459196B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003166894A (en) * | 2001-11-29 | 2003-06-13 | Keihin Rika Kogyo:Kk | Gas leakage detection device |
| CN103616143A (en) * | 2013-11-25 | 2014-03-05 | 河南福森新能源科技有限公司 | Air tightness detecting device for cylindrical cell |
| CN108533811A (en) * | 2018-04-23 | 2018-09-14 | 东莞蒲微防水透气膜材料有限公司 | A kind of explosion-proof valve and detection method for inflating spool, fast aeration detection box body tightness |
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