CN212111717U - Soft packet of lithium cell insulation test structure - Google Patents
Soft packet of lithium cell insulation test structure Download PDFInfo
- Publication number
- CN212111717U CN212111717U CN202020425608.XU CN202020425608U CN212111717U CN 212111717 U CN212111717 U CN 212111717U CN 202020425608 U CN202020425608 U CN 202020425608U CN 212111717 U CN212111717 U CN 212111717U
- Authority
- CN
- China
- Prior art keywords
- insulation test
- aluminum
- test structure
- layer
- soft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a soft packet of lithium cell insulation test structure is through setting up electric core external member and insulation test external member. In actual application, because the plastic-aluminum membrane all cuts out in both sides banding district and forms the chamfer, cut out the both sides banding district of plastic-aluminum membrane promptly, let the aluminium lamination in the plastic-aluminum membrane expose, when carrying out insulation test to electric core external member, the conducting resin piece can with the aluminium lamination in the plastic-aluminum membrane stable contact arrive, can not melt because of the PP layer and cover the aluminium lamination that leads to in the conducting resin piece and the plastic-aluminum membrane and contact, and then influenced the insulation test accuracy to electric core external member, the soft packet lithium cell insulation test structure of this application can guarantee insulation test's accuracy well, greatly reduced insulation test's erroneous judgement rate.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a soft packet of lithium cell insulation test structure.
Background
Currently, a battery refers to a device that converts chemical energy into electrical energy in a portion of the space of a cup, tank, or other container or composite container that holds an electrolyte solution and metal electrodes to generate an electric current. Has a positive electrode and a negative electrode. With the advancement of technology, batteries generally refer to small devices that can generate electrical energy. Such as a solar cell. The performance parameters of the battery are mainly electromotive force, capacity, specific energy and resistance. The battery is used as an energy source, can obtain current which has stable voltage and current, is stably supplied for a long time and is slightly influenced by the outside, has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects of modern social life.
The kinds of batteries are various, for example, a lithium pouch battery; as another example, a button cell; as another example, a pin cell. Taking a soft package lithium battery as an example, due to a plurality of advantages, the soft package lithium battery is applied to a plurality of fields, the most common mobile phone field is used, and most of the existing mobile phone batteries are soft package lithium batteries. In the actual production manufacturing process of soft packet of lithium cell, in order to guarantee the output quality of soft packet of lithium cell, soft packet of lithium cell can be arranged and carry out various tests, prevents that its security of soft packet of lithium cell of production from reaching the requirement of production, when the user has used soft packet of lithium cell of not up to standard, just has very big potential safety hazard, threatens user's life safety constantly.
The important safety test of soft packet of lithium cell is regarded as in insulation test, and aim at detects the insulation resistance size of soft packet of lithium cell, and the insulation resistance undersize of soft packet of lithium cell should not otherwise take place the electron short circuit easily for soft packet of lithium cell, takes place electrochemical corrosion promptly to the life of soft packet of lithium cell has been influenced, can lead to the user to appear the incident when using even when serious, and from this it is visible, and insulation test is a very important process of soft packet of lithium cell. The insulation resistance test of the soft package lithium battery actually tests whether the negative electrode tab is conducted with an aluminum layer in an aluminum plastic film. The existing testing method comprises the steps that a metal clamp is used for clamping a cathode tab, the metal clamp is connected with an insulation testing device, then a conductive adhesive block is used for contacting an aluminum layer in an aluminum-plastic film at the position of a side edge, the conductive adhesive block is connected with the insulation testing device, and the insulation testing of the soft package lithium battery is completed according to the insulation resistance displayed on the insulation testing device. Although the insulating test to soft packet of lithium cell can be accomplished to above-mentioned mode, but foretell test method has the defect, because soft packet of lithium cell is at the in-process of encapsulation, need carry out heat-seal treatment to soft packet of lithium cell's side, under the effect of high temperature, the PP layer in the plastic-aluminum membrane overflows easily under high temperature, the PP layer that overflows promptly can cover the aluminium lamination, lead to electrically conductive gluey piece and aluminium lamination contact failure, the aluminium lamination can not be contacted to electrically conductive gluey piece even, and then lead to the insulation resistance of the soft packet of lithium cell of unable accurate test, there is very big misjudgement rate.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, providing one kind can be stable carry out insulation resistance test to soft packet of lithium cell, the insulation test accuracy is high and the soft packet of lithium cell insulation test structure that the erroneous judgement rate is low.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a soft packet of lithium cell insulation test structure, includes:
the battery cell comprises an aluminum-plastic film, an inner core, a positive tab and a negative tab, wherein the aluminum-plastic film is cut in edge sealing areas at two sides to form chamfered parts, the inner core is arranged in the aluminum-plastic film, the positive tab and the negative tab are arranged on the aluminum-plastic film, and the positive tab and the negative tab are connected with the inner core; and
the insulation test kit, insulation test kit includes tester, metal jig and two conductive glue pieces, metal jig with the tester is connected, metal jig is used for the centre gripping the negative pole ear, two conductive glue piece all with the tester is connected, two conductive glue piece is used for one-to-one contact two the chamfer portion.
In one embodiment, a contact bevel is disposed on the chamfered portion, and the length of the contact bevel is COS45 ° and is less than or equal to the width of the edge sealing region.
In one embodiment, the positive tab is an aluminum positive tab.
In one embodiment, the negative electrode tab comprises a copper sheet and a protective layer, the copper sheet is arranged on the aluminum-plastic film and connected with the inner core, and the protective layer wraps the copper sheet.
In one embodiment, the protective layer is a nickel protective layer.
In one embodiment, the aluminum plastic film comprises a PET layer, a nylon layer, an aluminum layer and a PP layer, and the PET layer, the nylon layer, the aluminum layer and the PP layer are sequentially stacked to form the aluminum plastic film.
In one embodiment, the core includes a positive electrode sheet, a separator sheet, and a negative electrode sheet, which are sequentially stacked and wound to form the core.
In one embodiment, the positive electrode tab has a rectangular cross section.
In one embodiment, the membrane sheet has a rectangular cross-section.
In one embodiment, the negative electrode tab has a rectangular cross-section.
The utility model discloses compare in prior art's advantage and beneficial effect as follows:
the utility model discloses a soft packet of lithium cell insulation test structure is through setting up electric core external member and insulation test external member. In actual application, because the plastic-aluminum membrane all cuts out in both sides banding district and forms the chamfer, cut out the both sides banding district of plastic-aluminum membrane promptly, let the aluminium lamination in the plastic-aluminum membrane expose, when carrying out insulation test to electric core external member, the conducting resin piece can with the aluminium lamination in the plastic-aluminum membrane stable contact arrive, can not melt because of the PP layer and cover the aluminium lamination that leads to in the conducting resin piece and the plastic-aluminum membrane and contact, and then influenced the insulation test accuracy to electric core external member, the soft packet lithium cell insulation test structure of this application can guarantee insulation test's accuracy well, greatly reduced insulation test's erroneous judgement rate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is the utility model discloses a soft packet of lithium cell insulation test structure's among the embodiment structural schematic.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an insulation test structure 10 of a soft package lithium battery includes a cell kit 100 and an insulation test kit 200.
As such, it should be noted that the cell kit 100 plays a role in charging and discharging; the insulation test kit 200 is used for an operation of performing an insulation test on the cell kit 100.
Referring to fig. 1, the battery cell kit 100 includes an aluminum-plastic film 110, an inner core, a positive tab 120 and a negative tab 130, the aluminum-plastic film 110 is cut at edge sealing regions at two sides to form chamfered portions 111, the inner core is disposed in the aluminum-plastic film 110, the positive tab 120 and the negative tab 130 are disposed on the aluminum-plastic film 110, and the positive tab 120 and the negative tab 130 are connected to the inner core.
Thus, it should be noted that the aluminum-plastic film 110 plays a role in protection; the inner core plays a role in charging and discharging, when the inner core is connected with external charging equipment, the external charging equipment charges the inner core, and when the inner core is connected with external electric equipment, the inner core discharges the external electric equipment; the positive electrode tab 120 and the negative electrode tab 130 function as an electrical connection for connecting an external charging device or an external power consuming device.
Referring to fig. 1, the insulation test kit 200 includes a tester 210, a metal fixture 220 and two conductive adhesive blocks 230, wherein the metal fixture 220 is connected to the tester 210, the metal fixture 220 is used for clamping the negative tab 130, the two conductive adhesive blocks 230 are both connected to the tester 210, and the two conductive adhesive blocks 230 are used for contacting the two chamfered portions 111 in a one-to-one correspondence manner.
In this way, it should be noted that the tester 210 is configured to display the insulation resistance of the cell kit 100; the metal clamp 220 is used for clamping the negative electrode tab 130; the two conductive adhesive blocks 230 are used for contacting the two chamfered portions 111 in a one-to-one correspondence manner, that is, one conductive adhesive block 230 is used for contacting one chamfered portion 111 correspondingly, and the other conductive adhesive block 230 is used for contacting the other chamfered portion 111 correspondingly.
It should be noted that, before the insulation resistance test of the cell kit 100, first, two conductive adhesive blocks 230 are used to contact two chamfered portions 111 in a one-to-one correspondence, after the negative tab 130 is held by the metal clamp 220, the reading of the tester 210 is taken, which is intended to measure the contact resistance, when the contact resistance meets the preset value, the insulation resistance test of the cell kit 100 is performed formally, and one of the conductive adhesive blocks 230 is used to contact one of the chamfered portions 111 correspondingly (note that only one conductive adhesive block 230 is required to contact one chamfered portion 111, and it is not required that both conductive adhesive blocks 230 are contacted), and then clamping the negative tab 130 by using a metal clamp 220, and reading the reading of the tester 210, wherein the read insulation resistance is the insulation resistance of the battery cell suite 100, and when the insulation resistance meets a preset value, judging that the insulation resistance is qualified.
It should be noted that the preset values of the contact resistance and the insulation resistance are set according to actual situations, that is, according to the types of the different cell assemblies 100.
Further, in an embodiment, the aluminum plastic film 110 includes a PET layer, a nylon layer, an aluminum layer, and a PP layer, which are sequentially stacked to form the aluminum plastic film.
Therefore, the PET layer and the nylon layer play a role in protection; the aluminum layer plays a conductive role; the PP layer is an encapsulation layer.
It should be further noted that, because the aluminum-plastic film 110 is cut in the both sides edge banding area to form the chamfered portion 111, that is, the both sides edge banding area of the aluminum-plastic film 110 is cut, the aluminum layer in the aluminum-plastic film 110 is exposed, when the insulation test is performed on the cell kit, the conductive adhesive block 230 can be stably contacted with the aluminum layer in the aluminum-plastic film 110, the conductive adhesive block 230 cannot be contacted with the aluminum layer in the aluminum-plastic film 110 due to the fact that the PP layer is melted and covered, and the accuracy of the insulation test on the cell kit 100 is affected, the insulation test structure 10 of the soft package lithium battery of the application can well guarantee the accuracy of the insulation test, and the misjudgment rate of the insulation test is greatly reduced.
Further, referring to fig. 1, in one embodiment, the chamfered portion 111 is provided with a contact slope, and the length of the contact slope is COS45 ° less than or equal to the width of the edge sealing region.
In this way, it should be noted that the contact slope is provided on the chamfered portion 111, the length of the contact slope, COS45 °, is less than or equal to the width of the sealing area, and the length of the contact slope, i.e., the MB side length shown in fig. 1, is designed to locate the chamfered portion 111 in the sealing area of the aluminum-plastic film 110, so as to prevent the electrolyte in the aluminum-plastic film 110 from leaking out due to over-cutting.
Further, in one embodiment, the positive tab is an aluminum positive tab.
Therefore, it should be noted that the positive tab 120 is an aluminum positive tab, and aluminum has good conductivity, and the specific material of the positive tab 120 can also be flexibly selected according to actual conditions.
Further, in an embodiment, the negative electrode tab 130 includes a copper sheet and a protection layer, the copper sheet is disposed on the aluminum plastic film 110, the copper sheet 130 is connected to the inner core, and the protection layer wraps the copper sheet.
Therefore, it is to be noted that the copper sheet has good conductive performance; the protective layer plays a role in protecting the copper sheet. Specifically, the protective layer is a nickel protective layer. Therefore, it should be noted that the specific material of the protective layer can be flexibly selected according to the actual situation.
Further, in an embodiment, the core includes a positive electrode sheet, a separator sheet, and a negative electrode sheet, which are sequentially stacked and wound to form the core.
Thus, it should be noted that the inner core includes a positive plate, a diaphragm plate and a negative plate, and the positive plate, the diaphragm plate and the negative plate are sequentially stacked and wound to form the inner core, that is, the inner core of the present application is a wound inner core, and the specific working principle of the wound inner core is not described in detail and is well known to those skilled in the art. Specifically, the positive electrode sheet has a rectangular cross section; the membrane sheet has a rectangular cross-section; the negative electrode tab has a rectangular cross section.
The utility model discloses a soft packet of lithium cell insulation test structure is through setting up electric core external member and insulation test external member. In actual application, because the plastic-aluminum membrane all cuts out in both sides banding district and forms the chamfer, cut out the both sides banding district of plastic-aluminum membrane promptly, let the aluminium lamination in the plastic-aluminum membrane expose, when carrying out insulation test to electric core external member, the conducting resin piece can with the aluminium lamination in the plastic-aluminum membrane stable contact arrive, can not melt because of the PP layer and cover the aluminium lamination that leads to in the conducting resin piece and the plastic-aluminum membrane and contact, and then influenced the insulation test accuracy to electric core external member, the soft packet lithium cell insulation test structure of this application can guarantee insulation test's accuracy well, greatly reduced insulation test's erroneous judgement rate.
The above embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a soft packet of lithium cell insulation test structure which characterized in that includes:
the battery cell comprises an aluminum-plastic film, an inner core, a positive tab and a negative tab, wherein the aluminum-plastic film is cut in edge sealing areas at two sides to form chamfered parts, the inner core is arranged in the aluminum-plastic film, the positive tab and the negative tab are arranged on the aluminum-plastic film, and the positive tab and the negative tab are connected with the inner core; and
the insulation test kit, insulation test kit includes tester, metal jig and two conductive glue pieces, metal jig with the tester is connected, metal jig is used for the centre gripping the negative pole ear, two conductive glue piece all with the tester is connected, two conductive glue piece is used for one-to-one contact two the chamfer portion.
2. The soft-package lithium battery insulation test structure of claim 1, wherein the chamfer is provided with a contact bevel, and the length of the contact bevel is COS45 degrees and is less than or equal to the width of the edge sealing area.
3. The insulation test structure of the lithium battery pack as claimed in claim 1, wherein the positive tab is an aluminum positive tab.
4. The soft-package lithium battery insulation test structure according to claim 1, wherein the negative electrode tab comprises a copper sheet and a protective layer, the copper sheet is arranged on the aluminum-plastic film and connected with the inner core, and the protective layer wraps the copper sheet.
5. The soft-package lithium battery insulation test structure according to claim 4, wherein the protective layer is a nickel protective layer.
6. The insulation test structure of the soft-package lithium battery of claim 1, wherein the aluminum plastic film comprises a PET layer, a nylon layer, an aluminum layer and a PP layer, and the PET layer, the nylon layer, the aluminum layer and the PP layer are sequentially stacked to form the aluminum plastic film.
7. The soft-package lithium battery insulation test structure according to claim 1, wherein the inner core comprises a positive plate, a separator plate and a negative plate, and the positive plate, the separator plate and the negative plate are sequentially stacked and wound to form the inner core.
8. The insulation test structure of the lithium battery pack as claimed in claim 7, wherein the positive electrode sheet has a rectangular cross section.
9. The soft-packed lithium battery insulation test structure of claim 7, wherein the separator sheet has a rectangular cross section.
10. The soft-package lithium battery insulation test structure according to claim 7, wherein the negative plate has a rectangular cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020425608.XU CN212111717U (en) | 2020-03-27 | 2020-03-27 | Soft packet of lithium cell insulation test structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020425608.XU CN212111717U (en) | 2020-03-27 | 2020-03-27 | Soft packet of lithium cell insulation test structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212111717U true CN212111717U (en) | 2020-12-08 |
Family
ID=73635700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020425608.XU Active CN212111717U (en) | 2020-03-27 | 2020-03-27 | Soft packet of lithium cell insulation test structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212111717U (en) |
-
2020
- 2020-03-27 CN CN202020425608.XU patent/CN212111717U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101923091B1 (en) | Battery | |
| US6406815B1 (en) | Compact lithium ion battery and method of manufacturing | |
| CN111009679A (en) | Three-electrode battery cell, three-electrode soft package battery and preparation method thereof | |
| CN108508367A (en) | The detection method of flexible-packed battery pole group short circuit | |
| CN105703015A (en) | Laminated lithium ion battery | |
| KR20140082585A (en) | Secondary battery of pouch type having sealing margin for improving durability | |
| KR20180079924A (en) | Battery Cell Capable of Measuring Inner Temperature thereof | |
| CN103189935A (en) | PTC device and secondary battery having same | |
| CN105470577A (en) | Three-electrode assembly method of soft package lithium ion battery | |
| JP2004273139A (en) | Lithium secondary battery | |
| CN114982040A (en) | Three-electrode battery and energy storage system | |
| CN203562472U (en) | Novel cylindrical lithium-manganese battery | |
| CN111129432A (en) | Novel reference electrode and three-electrode system for nondestructive testing of lithium ion battery industry and method | |
| KR100865399B1 (en) | Secondary battery | |
| CN104485481A (en) | Lithium ion battery cell and lithium ion battery with same | |
| US20200161712A1 (en) | Cable-Type Battery | |
| US3748182A (en) | Button type cell casing and sealed button type battery | |
| CN111830324A (en) | Aluminum-plastic film insulation test structure and aluminum-plastic film insulation test method | |
| CN212111717U (en) | Soft packet of lithium cell insulation test structure | |
| CN102110824B (en) | Lithium-iron disulfide battery | |
| CN115360447A (en) | Three-electrode lithium ion battery and quick charge test method thereof | |
| CN111413634A (en) | Soft package lithium battery insulation test method | |
| KR20180115064A (en) | Battery Cell Comprising Hot-melting Adhesive Part | |
| CN106526497A (en) | Device and method for rapidly detecting corrosion danger-hidden points in lithium manganese flexible package battery | |
| CN112881941A (en) | Insulation test method capable of detecting capillary short circuit of battery core and corresponding battery conduction insulation detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |