CN215008421U

CN215008421U - Polymer lithium ion battery

Info

Publication number: CN215008421U
Application number: CN202120822325.3U
Authority: CN
Inventors: 肖龙淋; 张飞; 陈喜皇; 郭新越; 蔡华亮; 白兴辉; 梁俊; 刘仕臻; 吕品风; 袁唯
Original assignee: Shenzhen Xinwangda Intelligent Technology Co ltd
Current assignee: Shenzhen Xinwangda Intelligent Technology Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-03
Anticipated expiration: 2031-04-21

Abstract

The utility model relates to a polymer lithium ion battery, including polymer electricity core and first gluey shell, the polymer electricity core includes positive plate, diaphragm and negative pole piece, positive plate and negative pole piece separate and roll into polymer electricity core through the diaphragm, the head of polymer electricity core is provided with first installation step, be provided with the protruding muscle of first gluey shell on the first gluey shell, a side and the first butt of gluing shell bottom of first installation step, the protruding muscle of first gluey shell is located the top of first installation step tip, and the protruding muscle of first gluey shell and the tip of first installation step and first gluey shell upper portion between all be equipped with the tie coat. The utility model discloses an it establishes the protruding muscle of rubber shell to seal the position at the top that is close to polymer electricity core to glue injecting glue between the protruding muscle of rubber shell and polymer electricity core top seal, effectively improving the top seal intensity of polymer electricity core, thereby promoting the whole impact resistance of battery, optimized the battery encapsulation space.

Description

Polymer lithium ion battery

Technical Field

The utility model relates to a polymer lithium ion battery belongs to lithium ion battery technical field.

Background

The lithium ion battery is a general term for a battery taking a lithium ion intercalation compound as a positive electrode material, has the characteristics of high energy density, high average output voltage, small self-discharge, no memory effect, excellent cycle performance and quick charge and discharge, and is called a green battery with high output power, long service life and no environmental pollution. Lithium ion batteries in the present stage have been widely used in the fields of mobile phones, notebook computers, portable electric tools, and the like. The lithium ion battery generally comprises a shell, an electric core winding body and electrolyte, wherein the electric core winding body and the electrolyte are accommodated in the shell, the electric core winding body is formed by winding a positive electrode plate, a negative electrode plate and a diaphragm, and the positive electrode plate and the negative electrode plate are also respectively connected with a positive electrode lug and a negative electrode lug.

The conventional battery packaging approach tends to expose its short plates when subjected to drop testing: the defects of top seal cracking of the battery core and the like exist. In the conventional PACK packaging design with the rubber shell, the rubber shell only plays a role in protecting PCM (pulse Code modulation) from being extruded, the rubber shell and the battery cell are fixed only by double-sided adhesive tape, and the risk of cracking of the top seal of the battery cell is not considered.

Disclosure of Invention

In view of the above problem, the utility model provides a polymer lithium ion battery, it is through adding at the position of being close to electric core top seal and establishing the protruding muscle of rubber shell and cover electric core top seal to inject glue between the protruding muscle of rubber shell and electric core top seal, effectively improve the top seal intensity of electric core, thereby promote the whole impact resistance of battery, optimized the battery encapsulation space.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a polymer lithium ion battery comprises a polymer battery core and a first rubber shell, wherein the polymer battery core comprises a positive plate, a diaphragm and a negative plate, and the positive plate and the negative plate are separated by the diaphragm and wound into the polymer battery core;

the head of polymer electricity core is provided with first installation step, be provided with first protruding muscle of gluey shell on the first gluey shell, a side of first installation step with first gluey shell bottom butt, first protruding muscle of gluey shell is located the top of first installation step tip, just first gluey shell protruding muscle with the tip of first installation step and first installation step with all be equipped with the tie coat between the first shell upper portion of gluing.

Preferably, the polymer lithium ion battery comprises a metal sheet and an outer-coated aluminum-plastic film, the metal sheet and the outer-coated aluminum-plastic film are surrounded into a groove-shaped structure, the first rubber casing is fixed in the first mounting step, the length and the width of the first mounting step are both smaller than those of the polymer battery core, and the side face of the first mounting step is coated with adhesive paper for further enhancing the connection stability of the first rubber casing and the first mounting step.

Preferably, the height and the width of the outward bulge of the first rubber shell convex rib are 0.2-1.0 mm.

The polymer lithium ion battery is preferably characterized in that the distance between the bottom surface of the first rubber shell convex rib and the top surface of the end part of the first mounting step is 0.15-1.00 mm.

The polymer lithium ion battery preferably further comprises a first PCM board, the first PCM board is electrically connected with the polymer battery core, a groove for accommodating the first PCM board is arranged in the first rubber casing, and part or all of the side surfaces of the first PCM board are wrapped by the first rubber casing.

The polymer lithium ion battery is preferably connected with the polymer battery cell in a laser spot welding manner, and the first rubber shell and the polymer battery cell are bonded by injecting glue in a gap between the first rubber shell and the polymer battery cell through a dispenser.

The polymer lithium ion battery preferably further comprises a head adhesive tape and a peripheral adhesive tape, wherein the head adhesive tape is wrapped on the end surface and the side surface of the first mounting step, and the peripheral adhesive tape is wrapped on the outer surface of the head adhesive tape.

The polymer lithium ion battery preferably further comprises an easy-to-tear sticker wrapped on the upper and lower surfaces of the polymer lithium ion battery, and a lifting handle wrapped on the upper and lower surfaces and the side surfaces of the polymer lithium ion battery.

The polymer lithium ion battery is characterized in that the head of the polymer battery cell is provided with a first positive tab and a first negative tab, and the first positive tab and the first negative tab are electrically connected with the first PCM plate through laser welding of metal sheets respectively.

The polymer lithium ion battery is characterized in that a second PCM plate, a second rubber casing, a second positive tab and a second negative tab are further arranged at the tail of the polymer battery cell, the second PCM plate is electrically connected with the polymer battery cell, a groove for accommodating the second PCM plate is arranged in the second rubber casing, part or all of the side surface of the second PCM plate is wrapped by the second rubber casing, and the second positive tab and the second negative tab are respectively welded with the second PCM plate through metal sheets to form electrical connection.

The utility model discloses owing to take above technical scheme, it has following advantage:

1. the utility model discloses an it establishes the protruding muscle of gluey shell to add at the position of being close to electric core top seal to inject glue between the protruding muscle of gluey shell and electric core top seal, effectively improve the top of electric core and seal intensity, thereby promote the whole impact resistance of battery, optimized the battery encapsulation space.

2. The utility model provides an electricity core can adopt two-way utmost point ear, compare in conventional electric core unilateral stretch out just, negative pole utmost point ear, and this novel electricity core adopts two sides to go out utmost point ear, and two circuit boards are assembled respectively to electricity core that can be fine, realize that both ends all have circuit board components and parts to reduce the thickness of whole machine, promote energy density, opened up a new field for future polymer battery's encapsulation.

3. The utility model discloses PCM in the battery can adopt the form that the shell surrounds entirely of gluing, and this kind is when mobile phone terminal installation, prevents that two upper and lower PCMs from receiving the influence of gravity and receiving the extrusion, but also can protect PCM not receive the extrusion when the complete machine uses, prevents to puncture electric core and takes place the incident.

Drawings

Fig. 1 is an exploded view of a polymer lithium ion battery according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a positional relationship between the battery cell and the rubber casing according to the embodiment of the present invention;

fig. 3 is a schematic view of a locally enlarged view of the cell protrusions and the rubber case ribs provided in this embodiment of the present invention;

fig. 4 is a schematic view of a connection relationship between the battery cell and the plastic shell and between the battery cell and the PCM according to the embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a partial enlargement of the battery cell, the plastic shell, the PCM, and the head adhesive tape according to the embodiment of the present invention;

fig. 6 is a schematic view of a connection relationship between a bidirectional electrode rubber case rib and a battery cell protrusion according to another embodiment of the present invention;

fig. 7 is a schematic view of a connection relationship between the bidirectional electrode plastic shell, the battery cell and the PCM according to the embodiment of the present invention;

fig. 8 is a schematic view of a connection relationship between the bidirectional electrode plastic shell and the battery cell, the PCM, and the head adhesive tape according to the embodiment of the present invention;

fig. 9 is an overall schematic view of the bidirectional electrode polymer lithium ion battery provided in this embodiment of the present invention;

the respective symbols in the figure are as follows:

1-bottom gummed paper; 2-double sided adhesive tape; 3-a polymer cell; 4-easy tearing and sticking; 5-lifting the handle; 6-first rubber shell, 601-first rubber shell convex rib; 7-a first PCM board; 8-head gummed paper; 9-peripheral gummed paper; 10-process protection film; 11-a gap; 12-first mounting step.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary person in the art without creative work belong to the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. As used herein, the terms "head," "tail," "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The utility model provides a polymer lithium ion battery, including polymer electricity core 3 and first gluey shell 6, polymer electricity core 3 includes positive plate, diaphragm and negative pole piece, positive plate and negative pole piece separate and roll into polymer electricity core 3 through the diaphragm, the head of polymer electricity core 3 is provided with first installation step 12, be provided with first protruding muscle 601 of gluey shell on the first gluey shell 6, a side and the first 6 bottom butts of gluey shell of installation step 12, first protruding muscle 601 of gluey shell is located the top of 12 tip of first installation step, and first protruding muscle 601 of gluey shell and the tip of first installation step 12 and first installation step 12 all are equipped with the tie coat between the first shell 6 of gluing. The utility model discloses an it establishes first protruding muscle 601 of gluey shell to seal the position at the top that is close to polymer electricity core 3 to pour into glue into between first protruding muscle 601 of gluey shell and the 3 tops of polymer electricity core seal, effectively improve the top of polymer electricity core 3 and seal intensity, thereby promote the whole impact resistance of battery, optimized the battery encapsulation space.

In the utility model discloses a preferred embodiment, as shown in fig. 2, first installation step 12 includes sheetmetal and outsourcing plastic-aluminum membrane, and sheetmetal and outsourcing plastic-aluminum membrane enclose into fluted body structure, and first gluey shell 6 is fixed in first installation step 12, and the length and the width of first installation step 12 all are less than the length and the width of polymer electricity core 3, for further strengthening the stability of being connected of first gluey shell 6 and first installation step 12, wraps up the adhesive tape in the side of first installation step 12.

In the present embodiment, as shown in fig. 3, 6 and 8, the height and width of the outward protrusion of the first rubber-shell rib 601 is 0.2-1.0 mm. Specifically, as shown in fig. 3, a two-dimensional plane coordinate system is established, the length extending in the x direction is called height, the length extending in the y direction is called width, and the height and the width in fig. 6 and 8 are also calibrated by using the coordinate system in fig. 3.

In the present embodiment, as shown in fig. 3 and 6, a gap 11 is left between the first rubber-shell rib 601 and the end of the first mounting step 12, the width of the gap 11 is 0.15 to 1.00mm, and the gap 11 is configured to inject glue so as to bond and fix the first rubber-shell rib 601 and the end of the first mounting step 12.

In the present embodiment, as shown in fig. 1, 4, 5, 7, and 8, the PCM pack further includes a first PCM plate 7, the first PCM plate 7 is electrically connected to the polymer cell 3, a groove for accommodating the first PCM plate 7 is provided in the first plastic case 6, and a part of or all of the side surfaces of the first PCM plate 7 are covered by the first plastic case 6.

In a preferred embodiment of the present invention, the first PCM board 7 is connected to the polymer cell 3 by laser spot welding, and the first rubber shell 6 is bonded to the polymer cell 3 by glue injection in the gap 11 therebetween by a glue dispenser. The glue injected by the glue dispenser is hot melt adhesive which is a plastic adhesive with good insulativity, waterproofness, chemical corrosion resistance and mechanical impact resistance, is in a solid state at normal temperature, and can be converted into a molten state from the solid state when heated to a specified temperature; the specified temperature is the temperature at which the solid hot melt adhesive material can be changed from a solid state to a molten state with fluidity.

In a preferred embodiment of the present invention, as shown in fig. 1, the head adhesive tape 8 and the peripheral adhesive tape 9 are further included, the head adhesive tape 8 is wrapped on the end surface and the side surface of the first mounting step 12, and the peripheral adhesive tape 9 is wrapped on the outer surface of the head adhesive tape 8.

In a preferred embodiment of the present invention, as shown in fig. 1, the battery further includes an easy-to-tear sticker 4 and a lifting handle 5, the easy-to-tear sticker 4 is wrapped on the upper and lower surfaces of the polymer lithium ion battery, and the lifting handle 5 is wrapped on the upper and lower surfaces and the side surfaces of the polymer lithium ion battery.

In a preferred embodiment of the present invention, as shown in fig. 1, the device further comprises a double-sided adhesive tape 2 and a process protection film 10, wherein one side of the double-sided adhesive tape 2 is adhered with an easy-to-tear tape 4, and the other side is adhered with the process protection film 10.

In a preferred embodiment of the present invention, the head of the polymer electric core 3 is provided with a first positive tab and a first negative tab, and the first positive tab and the first negative tab are electrically connected to the first PCM board 7 by welding a metal sheet thereon. The metal sheet may be a nickel material, an aluminum material, or a copper nickel plated material.

In the utility model discloses a preferred embodiment, the afterbody of polymer electricity core 3 still is provided with second PCM board, the second is glued the shell, the anodal ear of second and second negative pole ear, and the second PCM board is connected with polymer electricity core 3 electricity, is provided with the recess that holds the second PCM board in the second is glued the shell, and the partial side or whole side of second PCM board are glued the shell parcel by the second, and the anodal ear of second and second negative pole ear form the electricity through sheetmetal and second PCM board welding respectively and are connected.

In this embodiment, the tail of the polymer electric core 3 is further provided with a second mounting step, a second rubber casing convex rib is arranged on the second rubber casing, one side surface of the second mounting step is abutted against the bottom of the second rubber casing, the second rubber casing convex rib is positioned below the end part of the second mounting step, and bonding layers are respectively arranged between the second rubber casing convex rib and the end part of the second mounting step and between the second mounting step and the lower part of the second rubber casing. The terms "upper" and "lower" in this embodiment refer to fig. 3, in which the head of the polymer cell 3 is above and the tail is below.

In the present invention, the PCM hard Board is a COB (Chip on Board: Chip on Board) process Board, but not only such processes as PCB, soft Board stiffener, soft and hard solder Board, and soft and hard combination Board are all used in the new range.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A polymer lithium ion battery comprises a polymer battery core and a first rubber shell, wherein the polymer battery core comprises a positive plate, a diaphragm and a negative plate, the positive plate and the negative plate are separated by the diaphragm and are wound into the polymer battery core, and the polymer lithium ion battery is characterized in that:

2. The polymer lithium ion battery of claim 1, wherein:

first installation step includes sheetmetal and outsourcing plastic-aluminum membrane, sheetmetal and outsourcing plastic-aluminum membrane enclose into fluted body type structure, first gluey shell is fixed in first installation step, the length and the width of first installation step all are less than the length and the width of polymer electricity core.

3. The polymer lithium ion battery of claim 1, wherein:

the height and the width of the outward bulge of the first rubber shell convex rib are 0.2-1.0 mm.

4. The polymer lithium ion battery of claim 1, wherein:

the distance between the bottom surface of the first rubber shell convex rib and the top surface of the end part of the first mounting step is 0.15-1.00 mm.

5. The polymer lithium ion battery of claim 1, wherein:

the first PCM plate is electrically connected with the polymer battery core, a groove for accommodating the first PCM plate is arranged in the first glue shell, and part of or all of the side surface of the first PCM plate is wrapped by the first glue shell.

6. The polymer lithium ion battery of claim 5, wherein:

the first PCM plate is connected with the polymer battery core in a spot welding mode, and the first rubber shell and the polymer battery core are bonded in a gap between the first rubber shell and the polymer battery core through a glue dispenser in an injection manner.

7. The polymer lithium ion battery according to any one of claims 1 to 6, wherein:

the head mounting step comprises a first mounting step, a second mounting step and a peripheral adhesive paper, wherein the first mounting step is arranged on the outer surface of the first mounting step, the second mounting step is arranged on the outer surface of the first mounting step, and the peripheral adhesive paper is arranged on the outer surface of the first mounting step.

8. The polymer lithium ion battery of claim 7, wherein:

the polymer lithium ion battery pack is characterized by further comprising an easy-to-tear sticker and a lifting handle, wherein the easy-to-tear sticker is wrapped on the upper surface and the lower surface of the polymer lithium ion battery, and the lifting handle is wrapped on the upper surface, the lower surface and the side face of the polymer lithium ion battery.

9. The polymer lithium ion battery of claim 5 or 6, wherein:

the head of the polymer battery cell is provided with a first positive tab and a first negative tab, and the first positive tab and the first negative tab are respectively welded with the first PCM plate through metal sheets to form electric connection.

10. The polymer lithium ion battery according to any one of claims 1 to 6, wherein:

the tail of the polymer battery cell is further provided with a second PCM plate, a second rubber shell, a second positive lug and a second negative lug, the second PCM plate is electrically connected with the polymer battery cell, a groove for accommodating the second PCM plate is formed in the second rubber shell, part or all of the side face of the second PCM plate is wrapped by the second rubber shell, and the second positive lug and the second negative lug are respectively welded with the second PCM plate through metal sheets to form electrical connection.