CN217035723U - Wave-shaped lithium battery - Google Patents
Wave-shaped lithium battery Download PDFInfo
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- CN217035723U CN217035723U CN202123347658.4U CN202123347658U CN217035723U CN 217035723 U CN217035723 U CN 217035723U CN 202123347658 U CN202123347658 U CN 202123347658U CN 217035723 U CN217035723 U CN 217035723U
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Abstract
The utility model discloses a waveform lithium battery, which belongs to the technical field of lithium ion batteries and is characterized by at least comprising: the battery cell consists of a positive plate, a negative plate and an isolating membrane; the positive plate is provided with a positive tab, and the negative plate is provided with a negative tab; the isolating film is arranged between the positive plate and the negative plate; the shell is wrapped on the outer wall of the battery cell; wherein: the battery core and the shell are both in a wave shape. By adopting the technical scheme, the lithium ion battery can keep the consistency of the binding force and the tightness degree of the battery cell of the lithium ion battery, has uniform internal tension and excellent cycle performance, and can realize high energy density and better heat effect of the lithium ion battery.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a waveform lithium battery.
Background
The lithium ion battery has the unique advantages of high specific energy, good service life performance and safety and the like, so the application performance of the lithium ion battery is widely researched. The current lithium ion battery core mainly has two types, namely cylindrical and square.
The cylindrical lithium ion battery has the advantages of uniform internal tension of the battery core, good battery consistency, long cycle life and the like. The battery core pole piece is only cut, so that burrs are basically avoided, and potential safety hazards caused by self-discharge and internal short circuit of the battery can be reduced. In addition, the battery can ensure strong binding force of the battery core, consistency of tightness degree, uniform tension in the battery and excellent cycle performance during winding. However, the cylindrical wound battery has a low volumetric energy density and is not easy to dissipate heat during heavy current discharge, which may cause rapid degradation of battery performance due to heat accumulation in the battery.
The positive and negative electrodes of the electric core of the square lithium ion battery have pole pieces which are easy to process and assemble, the high-power current collection is easy to design, and the space is compact and easy to manufacture and group, so that the volume energy density is higher, the heat dissipation surface is larger when the large current is discharged, and the heat effect is better. However, the battery is easy to deform or swell due to the gas generation or the lattice parameter change of the electrode material because the binding force between the cell layers is very small in the using process. In the document (invention patent: a measuring device and a measuring method for the bulge degree of a square lithium ion battery, 202011465105.6), it is mentioned that because the tension at each position of the plane of a battery core is different, the binding force is small, after long-term circulation, electrode materials expand or electrolyte is decomposed to generate gas, the battery core generates wavy deformation or bulge, the deterioration of the electrical performance of the battery is greatly accelerated, and simultaneously, the deformation of a battery shell and even potential safety hazards can be caused.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a waveform lithium battery, which can keep the consistency of the binding force and the tightness degree of a lithium ion battery cell, has uniform tension and excellent cycle performance in the battery, and can realize higher energy density and better heat effect of the lithium ion battery.
The utility model aims to provide a waveform lithium battery, which comprises:
the battery cell consists of a positive plate, a negative plate and an isolating membrane; the positive plate is provided with a positive tab, and the negative plate is provided with a negative tab;
the isolating film is arranged between the positive plate and the negative plate;
the shell is wrapped on the outer wall of the battery cell; wherein:
the battery core and the shell are both in a wave shape.
Preferably, the structure of the positive plate is a sine wave.
Preferably, the amplitude range of the positive plate is 0.1 mm-100 mm,
preferably, the distance between two adjacent wave crests of the positive plate ranges from 1cm to 100 cm.
Preferably, the structure of the negative electrode sheet is a sine wave shape.
Preferably, the amplitude range of the negative plate is 0.1 mm-100 mm.
Preferably, the distance between two adjacent wave crests of the negative electrode sheet ranges from 1cm to 100 cm.
The beneficial effect of this application is:
the battery core and the shell of the utility model are both in a waveform shape, which not only can ensure better constraint force of the battery core of the lithium ion battery and consistency of tightness, uniform tension in the battery and excellent cycle performance, but also can realize higher energy density of the lithium ion battery and better heat effect. Therefore, the phenomenon that the square battery is easy to deform or swell due to gas generation or electrode material lattice parameter change because of small binding force between battery cell layers in the using process is improved, the bulging deformation reject ratio of the lithium ion battery is effectively reduced, and the phenomenon that the cylindrical lithium ion battery is low in volume energy density and difficult to dissipate heat during large-current discharging is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is an external structural view of a preferred embodiment of the present invention;
fig. 2 is a schematic view of the internal structure of the preferred embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
It should be noted that the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 to 2, a waveform lithium battery includes a battery cell 4 and a casing 1; wherein:
the battery cell 4 consists of a positive plate, a negative plate and an isolating membrane; the number of the lugs 5 is two, and the two lugs are respectively: the positive tab 2 is arranged on the positive plate, and the negative tab 3 is arranged on the negative plate; the two tabs 5 are arranged on the same side of the battery cell 4;
the isolating film is arranged between the positive plate and the negative plate;
the outer shell 1 wraps the outer wall of the battery cell 4;
the battery core and the shell are both in a wave shape.
In the preferred embodiment, each part is integrally sine-wave-shaped or cosine-wave-shaped;
as shown in fig. 2: taking a sine wave as an example:
the structure of the positive plate is in a sine wave shape.
The amplitude range of the positive plate is 0.1 mm-100 mm,
the distance range between two adjacent wave crests of the positive plate is 1 cm-100 cm.
The structure of the negative plate is in a sine wave shape.
The amplitude range of the negative plate is 0.1 mm-100 mm.
The distance range between two adjacent wave crests of the negative plate is 1 cm-100 cm.
The structural principle of the utility model is as follows:
the battery cell and the shell are both in a waveform shape, the waveform bending of the waveform battery cell inherits the advantage of internal tension of the cylindrical lithium ion battery cell, the coating of the internal bending tension of the battery cell can be ensured, the internal tension of the battery cell is uniform, and the internal stress of the battery cell is uniform;
not only can ensure better battery core binding force, consistency of tightness degree, uniform tension in the battery and excellent cycle performance,
meanwhile, the waveform battery cell inherits the characteristics of the battery cell of the square lithium ion battery, and the positive electrode and the negative electrode have the advantages of simple pole piece processing, easy assembly, easy design of high-power current collection, compact space and easy manufacture and grouping, so the volume energy density is higher, the heat dissipation surface is larger during heavy current discharge, and the heat effect is better.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A corrugated lithium battery, comprising at least:
the battery cell (4) consists of a positive plate, a negative plate and an isolating membrane; the positive plate is provided with a positive tab (2), and the negative plate is provided with a negative tab (3);
the isolating film is arranged between the positive plate and the negative plate;
a shell (1) wrapped on the outer wall of the battery cell; wherein:
the battery core (4) and the shell (1) are both wave-shaped.
2. The corrugated lithium battery of claim 1, wherein: the structure of the positive plate is in a sine wave shape.
3. The corrugated lithium battery of claim 2, wherein: the amplitude range of the positive plate is 0.1 mm-100 mm.
4. The corrugated lithium battery of claim 2, wherein: the distance range between two adjacent wave crests of the positive plate is 1 cm-100 cm.
5. The waveform lithium battery of claim 1, wherein: the structure of the negative plate is in a sine wave shape.
6. The corrugated lithium battery of claim 5, wherein: the amplitude range of the negative plate is 0.1 mm-100 mm.
7. The waveform lithium battery of claim 5, wherein: the distance range between two adjacent wave crests of the negative plate is 1 cm-100 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123347658.4U CN217035723U (en) | 2021-12-28 | 2021-12-28 | Wave-shaped lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123347658.4U CN217035723U (en) | 2021-12-28 | 2021-12-28 | Wave-shaped lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217035723U true CN217035723U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123347658.4U Active CN217035723U (en) | 2021-12-28 | 2021-12-28 | Wave-shaped lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217035723U (en) |
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2021
- 2021-12-28 CN CN202123347658.4U patent/CN217035723U/en active Active
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