CN210347690U

CN210347690U - Soft-package battery insulation test contact device

Info

Publication number: CN210347690U
Application number: CN201921227052.7U
Authority: CN
Inventors: 于海彬; 许少辉
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-04-17
Anticipated expiration: 2029-07-31

Abstract

The utility model relates to an insulating test contact device of laminate polymer battery, laminate polymer battery adopt plastic-aluminum membrane packing mode, and the device is provided with the contact copper post with the blade contact including being used for cutting the metal blade that the plastic-aluminum membrane cut the section, being used for fixed blade's insulating material knife rest and insulating test instrument connecting wire on the knife rest, contact copper post links to each other with insulating test instrument connecting wire. The utility model discloses a mode that section was cut to metal blade cutting plastic-aluminum membrane has realized the effective contact of insulating test instrument with plastic-aluminum membrane aluminium lamination, has eliminated the problem that equipment that contact failure causes reports to the police and equipment utilization reduces, and metal blade is with low costs simultaneously, and longe-lived has avoided frequently changing the operation.

Description

Soft-package battery insulation test contact device

Technical Field

The utility model belongs to the technical field of the battery is made, especially, relate to a laminate polymer battery insulation test contact device.

Background

The lithium ion soft package battery has the advantages of good safety performance, light weight, high capacity, large energy density, small internal resistance, flexible design and the like. With the explosive development of new energy automobiles and the demand and policy drive of the new energy automobiles on the energy density of the power battery, the soft-package power battery is rapidly developed and applied to the field of the new energy automobiles by virtue of the advantages of high energy density and high safety, and the market share of the soft-package power battery is continuously increased.

The lithium ion soft package power battery adopts an aluminum plastic film packaging mode, the thickness of the aluminum plastic film is generally 153 μm, the lithium ion soft package power battery is mainly a composite material formed by ON/AL/CPP (outer nylon layer/middle aluminum foil layer/inner heat sealing layer), and the layers are combined through an adhesive. The aluminum-plastic film is one of the key materials for packaging the flexible-package lithium battery, plays a role in protecting the internal battery core material, and has important influence on the performance of the battery: the heat-sealing insulating material has extremely high barrier property, good heat-sealing property, electrolyte and strong acid corrosion resistance of the inner layer material, and good ductility, flexibility and mechanical strength.

In the production process of the soft package power battery, the potential risk of CPP damage exists in the aluminum plastic film pit punching and hot packaging links, when the CPP is damaged or cracked, the separation between the electrolyte inside the battery and the aluminum plastic film aluminum layer is lost, and the electrolyte slowly corrodes the aluminum plastic film aluminum layer to finally cause battery leakage due to the fact that the electrolyte has certain weak acidity. Meanwhile, under a certain condition, when the potential of the aluminum-plastic film is reduced, lithium ions can obtain electrons at the CPP rupture position of the aluminum-plastic film to perform a reduction reaction to generate lithium-aluminum alloy, and finally, the aluminum-plastic film is corroded to leak liquid. The leakage of a single battery can cause the failure of the whole power battery pack system, so that the power automobile cannot be started for use.

In order to avoid the occurrence of the liquid leakage condition of the battery caused by the rupture of the CPP in the aluminum plastic film, the production process of the lithium ion soft package power battery generally carries out the insulation test of the battery on automatic equipment, and an insulation test instrument is adopted to test the insulation state between a tab and the aluminum plastic film. Because the surface of the aluminum-plastic film is a nylon layer, the contact between the insulation test probe and the aluminum-plastic film can only contact the position of the section cut by the aluminum-plastic film, the thickness of the effective aluminum layer of the section is 40 mu m, the contact effectiveness control difficulty is high, and the poor contact can cause frequent alarm of equipment, so that the utilization rate of the equipment is reduced.

At present, the insulation test conventionally adopts a conductive foam contact mode, the section of the aluminum plastic film is in repetitive contact with the foam, and the foam is repeatedly pressed, cut and rubbed by the aluminum plastic film, is easy to damage, causes contact failure and needs to be replaced more frequently. Meanwhile, the thickness of the aluminum layer of the aluminum-plastic film cutting section is 40 microns, and the contact failure rate of foam is high due to the thin contact surface, so that automatic equipment frequently gives an alarm, and the utilization rate of the equipment is reduced.

Disclosure of Invention

The utility model provides a laminate polymer battery insulation test contact device aims at solving the cotton detection plastic-aluminum membrane insulating properties of current bubble, the higher technical problem of contact failure rate.

In order to solve the problem, the utility model provides an insulating test contact device of laminate polymer battery, laminate polymer battery adopt plastic-aluminum membrane packing mode, including being used for cutting the metal blade that the plastic-aluminum membrane cut the section, being used for insulating material knife rest and the insulating test instrument connecting wire of fixed blade, be provided with the contact copper post with the blade contact on the knife rest, the contact copper post links to each other with insulating test instrument connecting wire.

Furthermore, the knife rest comprises a left blade fixing block, a right blade fixing block and a knife rest base, the left blade fixing block is connected with the right blade fixing block through a bolt and fixes the blade left and right, the knife rest base supports the bottom of the blade, and the right blade fixing block is fixed with the knife rest base.

Furthermore, a limiting gasket is arranged between the knife rest base and the bottom of the blade, and a gap for replacing the limiting gasket is formed in the left blade fixing block.

Furthermore, the tool rest device further comprises a telescopic device, the telescopic device comprises a telescopic guide pillar, a telescopic spring and a base, a through hole matched with the telescopic guide pillar is formed in the base, the upper end of the telescopic guide pillar is fixed to the bottom surface of the tool rest base, the lower end of the telescopic guide pillar penetrates through the through hole, the upper end of the telescopic spring is sleeved into the telescopic guide pillar and fixed to the bottom surface of the tool rest base, and the lower end of the telescopic spring is fixed to the base.

Further, the blade is a single-sided stainless steel blade.

Further, the blade holder is made of ABS resin.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a mode that section was cut to metal blade cutting plastic-aluminum membrane has realized the effective contact of insulating test instrument with plastic-aluminum membrane aluminium lamination, has eliminated the problem that equipment that contact failure causes reports to the police and equipment utilization reduces, and metal blade is with low costs simultaneously, and longe-lived has avoided frequently changing the operation.

Drawings

Fig. 1 is a diagram of the structure of the device provided by the present invention.

1-blade, 2-knife rest, 3-insulation test instrument connecting wire, 4-contact copper column, 5-left blade fixing block, 6-right blade fixing block, 7-knife rest base, 8-bolt, 9-limiting gasket, 10-telescopic guide column, 11-telescopic spring and 12-base.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model provides a laminate polymer battery insulation test contact arrangement, laminate polymer battery adopt plastic-aluminum membrane packing mode, including being used for cutting the plastic-aluminum membrane and cutting the metal blade 1 of section, being used for fixed blade 1 insulating material knife rest 2 and insulating test instrument connecting wire 3, be provided with the contact copper post 4 with the contact of blade 1 on the knife rest 2, contact copper post 4 links to each other with insulating test instrument connecting wire 3. In the present embodiment, the aluminum-plastic film having a thickness of typically 153 μm is a composite material mainly composed of ON/AL/CPP (outer nylon layer/intermediate aluminum foil layer/inner heat seal layer), and when a battery insulation test is performed, the insulation state between the tab and the aluminum-plastic film is typically tested using an insulation tester. For the cotton contact of bubble, through metal blade 1 cutting plastic-aluminum membrane section of cutting, can realize the effective contact of metal blade 1 and plastic-aluminum membrane aluminium lamination to eliminate the contact failure rate, promote equipment utilization.

In a preferred embodiment, the knife rest 2 comprises a left blade fixing block 5, a right blade fixing block 6 and a knife rest base 7, the left blade fixing block 5 is connected with the right blade fixing block 6 through a bolt 8 and fixes the blade 1 left and right, the knife rest base 7 supports the bottom of the blade 1, and the right blade fixing block 6 is fixed with the knife rest base 7. Through left blade fixed block 5, change blade 1 that right blade fixed block 6 can be more convenient, make the operation more simple and convenient, adopt knife rest 2 can be more stable use blade 1 to carry out insulation test moreover, improved work efficiency, guaranteed product quality.

In the preferred embodiment, a limit gasket 9 is arranged between the tool rest base 7 and the bottom of the blade 1, and a gap for replacing the limit gasket 9 is arranged between the left blade fixing block 5 and the tool rest base 7. In this embodiment, the effective size of stretching out of 1 cutting edge of metal blade can be adjusted through spacing gasket 9, can effectively control the effective size of stretching out of 1 cutting edge of metal blade, and control is usually within 1mm, avoids cutting the aluminium-plastic film and cuts into the degree of depth too big and the battery that causes is bad to scrap. The limiting gasket 9 can be conveniently replaced through a gap at the lower part of the left blade fixing block 5. The limiting gasket 9 can be folded by using a copper foil to control the thickness and size, and is convenient to operate and adjust.

The preferable embodiment further comprises a telescopic device, the telescopic device comprises a telescopic guide pillar 10, a telescopic spring 11 and a base 12, a through hole matched with the telescopic guide pillar 10 is formed in the base 12, the upper end of the telescopic guide pillar 10 is fixed with the bottom surface of the tool rest base 7, the lower end of the telescopic guide pillar 10 penetrates through the through hole, the upper end of the telescopic spring 11 is sleeved into the telescopic guide pillar 10 and fixed with the bottom surface of the tool rest base 7, and the lower end of the telescopic spring 11 is fixed on the base 12. In the embodiment, the strength of the metal blade 1 for cutting the aluminum plastic film is controlled by the telescopic spring 11, and the spring with a certain elastic coefficient is selected, so that the cutting strength can be effectively controlled. The metal blade 1 moves back and forth by the stretching of the telescopic guide post 10, the guide post can effectively control the front and back movement levelness, and the device is prevented from shaking, so that the stability and the reliability of the device are improved.

In a preferred embodiment, the blade 1 is a single-sided stainless steel blade 1. The blade 1 is a conventional single-sided stainless steel blade 1, so that the purchase cost is low, the service life is long, and frequent replacement is not needed.

In a preferred embodiment, the tool holder 2 is ABS resin. The tool rest 2 is made of ABS resin, so that the purchase cost is low and the insulating property is good.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a laminate polymer battery insulation test contact device, laminate polymer battery adopts plastic-aluminum membrane packaging mode, its characterized in that: including being used for the cutting the metal blade of plastic-aluminum membrane section of cutting, be used for fixing the insulating material knife rest and the insulating test instrument connecting wire of blade, be provided with on the knife rest with the contact copper post of blade contact, the contact copper post with insulating test instrument connecting wire links to each other.

2. The laminate battery insulation test contact device of claim 1, characterized in that: the knife rest comprises a left blade fixing block, a right blade fixing block and a knife rest base, wherein the left blade fixing block is connected with the right blade fixing block through a bolt and is fixed to the left and the right of the blade, the knife rest base supports the bottom of the blade, and the right blade fixing block is fixed to the knife rest base.

3. The laminate battery insulation test contact device of claim 2, characterized in that: a limiting gasket is arranged between the knife rest base and the bottom of the blade, and a gap for replacing the limiting gasket is arranged on the left blade fixing block.

4. The laminate battery insulation test contact device of claim 2, characterized in that: the tool rest base is characterized by further comprising a telescopic device, the telescopic device comprises a telescopic guide pillar, a telescopic spring and a base, a through hole matched with the telescopic guide pillar is formed in the base, the upper end of the telescopic guide pillar is fixed to the bottom surface of the tool rest base, the lower end of the telescopic guide pillar penetrates through the through hole, the upper end of the telescopic spring is sleeved into the telescopic guide pillar and fixed to the bottom surface of the tool rest base, and the lower end of the telescopic spring is fixed to the base.

5. The pouch cell insulation test contact arrangement of claim 1, 2, 3 or 4, wherein: the blade is a single-sided stainless steel blade.

6. The pouch cell insulation test contact arrangement of claim 1, 2, 3 or 4, wherein: the tool rest is made of ABS resin.