CN208256786U - Battery - Google Patents
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- CN208256786U CN208256786U CN201820366765.0U CN201820366765U CN208256786U CN 208256786 U CN208256786 U CN 208256786U CN 201820366765 U CN201820366765 U CN 201820366765U CN 208256786 U CN208256786 U CN 208256786U
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- Prior art keywords
- electrode assembly
- pole piece
- isolation film
- anode pole
- cathode sheet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a kind of battery comprising: shell, electrolyte, at least one electrode assembly.Each electrode assembly includes: anode pole piece；Cathode sheet；Isolation film.The lower part in short transverse of the isolation film of each electrode assembly exceeds anode pole piece and cathode sheet, and the bottom surface in short transverse of at least part beyond anode pole piece and cathode sheet of the lower part of the isolation film of each electrode assembly anode pole piece and cathode sheet that the electrode assembly is coated via bending leads electrolyte layer to be formed, and at least part for leading electrolyte layer of two neighboring electrode assembly overlaps.When battery is placed under different placement operating conditions, the siphonage in the part between anode pole piece and cathode sheet of the isolation film of the siphonage for leading electrolyte layer and each electrode assembly based on each electrode assembly, electrolyte is diffused into each section of each electrode assembly, therefore ensures that electrolyte to the effect of impregnation of each electrode assembly.
Description
Technical field
The utility model relates to technical field of energy storage more particularly to a kind of batteries.
Background technique
Battery includes shell and the electrode assembly and electrolyte for being contained in shell, is that most having of being widely recognized as at present can
The energy-storage units of electric car can be become and different placement operating conditions can be encountered in use, such as upright, side puts or lies low.
It is well known, when battery is upright, electrolyte can by siphonage from rising to required position between the pole piece of electrode assembly, and
When battery side is put or is lain low, the path that electrolyte needs to climb is elongated (especially lying low even more serious when placing), electrode
The part of the separate electrolyte of component is difficult to touch electrolyte in time, imitates to influence electrolyte to the infiltration of electrode assembly
Fruit, and then cause the performance of battery that cannot normally play.Also, with the use of battery, electrolyte is gradually consumed and electric
The liquid level of solution liquid is gradually lowered, and the diffusion problem of such electrolyte in use just becomes more prominent, so that
Electrolyte becomes worse to the effect of impregnation of electrode assembly, will lead to electrode assembly analysis lithium when serious
Utility model content
In view of the problems in the background art, the purpose of this utility model is to provide a kind of battery, it can ensure that electricity
Electrolyte is to the effect of impregnation of electrode assembly under different placement operating conditions in pond, to guarantee battery, performance is being just in use
Often play.
To achieve the goals above, the utility model provides a kind of battery comprising: shell；Electrolyte is contained in shell
Body；And at least one electrode assembly, it is contained in shell.Each electrode assembly includes: anode pole piece；Cathode sheet；And isolation
Film is formed together electrode assembly between anode pole piece and cathode sheet and with anode pole piece, cathode sheet, and isolation film has
There is hole so that electrolyte is penetrated and diffused on the anode pole piece and cathode sheet of each electrode assembly.Wherein, each electrode assembly
The lower part in the short transverse of isolation film exceed anode pole piece and cathode sheet, and the institute of the isolation film of each electrode assembly
At least part beyond anode pole piece and cathode sheet for stating lower part coats the anode pole piece of the electrode assembly via bending
Electrolyte layer is led to be formed with the bottom surface in short transverse of cathode sheet, and the conductive solution of two neighboring electrode assembly
At least part of liquid layer overlaps.
The beneficial effects of the utility model are as follows:
In battery according to the present utility model, since the electrolyte layer of leading of each electrode assembly is formed by isolation film, and every
From the hole that there is film itself electrolysis liquid to penetrate, so that the electrolyte layer of leading of each electrode assembly is electrolyte in the electrode assembly
In diffusion provide transmission channel, simultaneously because at least part for leading electrolyte layer of two neighboring electrode assembly overlaps one
Rise, thus the part to overlap for leading electrolyte layer of two neighboring electrode assembly be electrolyte two electrode assemblies it
Between diffusion provide transmission channel.As a result, when battery is placed under different placement operating conditions, electrolyte is led based on each electrode assembly
The siphon in the part between anode pole piece and cathode sheet of the isolation film of the siphonage and each electrode assembly of layer is made
With electrolyte can be diffused into time in each section of each electrode assembly, and thus, it is possible to ensure electrolyte to each electrode assembly
Effect of impregnation, to ensure that the normal performance of battery performance in use.
Detailed description of the invention
Fig. 1 is the schematic partial cross-sectional view in width direction of battery according to the present utility model, wherein being omitted
Shell, the lower part in short transverse for illustrating only an electrode assembly and isolation film, which have not yet been formed, leads electrolyte layer.
Fig. 2 is the schematic partial cross-sectional view in width direction of battery according to the present utility model, wherein being omitted
Shell, the lower part in short transverse for showing two electrode assemblies and isolation film, which have been formed, leads electrolyte layer.
Fig. 3 is the enlarged drawing of the encircled portion in Fig. 2, wherein for the sake of clarity, after illustrating only encircled portion amplification
A portion.
Fig. 4 is the microscopic cross figure of the isolation film of each electrode assembly.
Fig. 5 is the partial schematic diagram for the battery seen when the battery of the utility model is upright from a visual angle, wherein in figure
The dispersal direction of dotted arrow expression electrolyte.
Fig. 6 is the partial schematic diagram for the battery seen when the battery of the utility model is upright from another visual angle, wherein in figure
Dotted arrow indicate electrolyte dispersal direction.
Fig. 7 is the partial schematic diagram for the battery seen when the battery side of the utility model is put from a visual angle, wherein in figure
The dispersal direction of dotted arrow expression electrolyte.
Fig. 8 is the partial schematic diagram for the battery seen when the battery side of the utility model is put from another visual angle, wherein in figure
Dotted arrow indicate electrolyte dispersal direction.
Fig. 9 is the partial schematic diagram for the battery seen when the battery of the utility model lies low from a visual angle, wherein in figure
The dispersal direction of dotted arrow expression electrolyte.
Figure 10 is the partial schematic diagram for the battery seen when the battery of the utility model lies low from another visual angle, wherein in figure
Dotted arrow indicate electrolyte dispersal direction.
Wherein, the reference numerals are as follows:
1 shell 24 leads electrolyte layer
2 electrode assembly, 25 coating
21 anode pole piece H short transverses
22 cathode sheet L length directions
23 isolation film W width directions
The lower part in short transverse of 23B isolation film
Specific embodiment
It is described in detail battery according to the present utility model with reference to the accompanying drawings.
Referring to figs. 1 to Figure 10, battery according to the present utility model includes: shell 1；Electrolyte (not shown), is contained in shell
Body 1；And at least one electrode assembly 2, it is contained in shell 1.
Each electrode assembly 2 includes: anode pole piece 21；Cathode sheet 22；And isolation film 23, it is located at anode pole piece 21 and yin
Be formed together electrode assembly 2 between pole pole piece 22 and with anode pole piece 21, cathode sheet 22, and isolation film 23 there is hole so that
Electrolyte is penetrated and is diffused on the anode pole piece 21 and cathode sheet 22 of each electrode assembly 2.Wherein, each electrode assembly 2 every
Exceed anode pole piece 21 and cathode sheet 22 from lower part 23B of the film 23 in height direction H, and each electrode assembly 2 every
At least part beyond anode pole piece 21 and cathode sheet 22 of the lower part 23B from film 23 coats the electricity via bending
The anode pole piece 21 of pole component 2 and the bottom surface in height direction H of cathode sheet 22 lead electrolyte layer 24 to be formed, and
At least part for leading electrolyte layer 24 of two neighboring electrode assembly 2 overlaps.
In battery according to the present utility model, since the electrolyte layer 24 of leading of each electrode assembly 2 is formed by isolation film 23,
And the hole that there is isolation film 23 itself electrolysis liquid to penetrate, so that the electrolyte layer 24 of leading of each electrode assembly 2 is that electrolyte exists
Diffusion in the electrode assembly 2 provides transmission channel, simultaneously because two neighboring electrode assembly 2 leads electrolyte layer 24 at least
A part overlaps, so that the part to overlap for leading electrolyte layer of two neighboring electrode assembly 2 is electrolyte
Diffusion between two electrode assemblies 2 provides transmission channel.As a result, when battery is placed under different placement operating conditions, based on each
The isolation film 23 of the siphonage for leading electrolyte layer 24 and each electrode assembly 2 of electrode assembly 2 in anode pole piece 21 with
The siphonage of part (i.e. the top in the height direction H of isolation film 23) between cathode sheet 22, electrolyte can be with
Be diffused into each section of each electrode assembly 2 in time, thus, it is possible to ensure electrolyte to the effect of impregnation of each electrode assembly 2, from
And it ensure that the normal performance of battery performance in use.
Specifically, referring to figure 5 and figure 6, when battery is upright, the lower part in height direction H of each electrode assembly 2
(comprising entirely leading electrolyte layer 24) is directly infiltrated by electrolyte, at this time the lower part in height direction H of each electrode assembly 2
Electrolyte via each electrode assembly 2 isolation film 23 between anode pole piece 21 and cathode sheet 22 part along height
Siphonage on the H of direction is siphoned into other required positions of each electrode assembly 2, so that it is guaranteed that electrolyte is to each electrode assembly 2
Effect of impregnation, ensure that the normal performance of battery performance in use.
Referring to Fig. 7 and Fig. 8, when battery side is put, the lower part on length direction L of each electrode assembly 2 (includes each electricity
The lower part on the length direction L for leading electrolyte layer 24 of pole component 2) it is directly infiltrated by electrolyte, each electrode assembly 2 at this time
The lower part on the length direction L for leading electrolyte layer 24 electrolyte first via leading electrolyte layer 24 along its length on L
Siphonage be siphoned into the top on the length direction L for leading electrolyte layer 24, then again via each electrode assembly 2 every
Each electricity is siphoned into siphonage of the part in height direction H between anode pole piece 21 and cathode sheet 22 from film 23
Other required positions of pole component 2, so that it is guaranteed that effect of impregnation of the electrolyte to each electrode assembly 2, ensure that battery is using
The normal performance of performance in the process.
Referring to Fig. 9 and Figure 10, when battery lies low, the electrode assembly 2 of the lower part on width direction W is directly electrolysed
The electrolyte of liquid infiltration, the lower part being now on width direction W first leads electrolyte layer 24 via two neighboring electrode assembly 2
Siphonage of the part to overlap in the width direction on W be siphoned into each electrode on the top on width direction W
Component 2 is led in electrolyte layer 24, then again via the isolation film 23 of corresponding electrode assembly 2 in anode pole piece 21 and yin
Siphonage of the part in height direction H between pole pole piece 22 is siphoned into other required positions of the electrode assembly 2, thus
Ensure electrolyte to the effect of impregnation of each electrode assembly 2, ensure that the normal performance of battery performance in use.
Referring to Figures 1 and 2, the lower part 23B in the height direction H of the isolation film 23 of each electrode assembly 2 is (as shown in figure 1
Dotted box portion) the L bending along its length of at least part beyond anode pole piece 21 and cathode sheet 22 and along width
The bottom surface in height direction H of anode pole piece 21 and cathode sheet 22 that direction W coats the electrode assembly 2 is led with being formed
Electrolyte layer 24.
It remarks additionally herein, usually in the forming process of each electrode assembly 2, the anode pole of each electrode assembly 2
The width of piece 21 can be greater than cathode sheet 22, therefore the part beyond anode pole piece 21 of the isolation film 23 of each electrode assembly 2 is answered
It is high that this at least guarantees that isolation film 23 is folded over being in for the anode pole piece 21 and cathode sheet 22 for coating the electrode assembly 2 completely afterwards
Spend the bottom surface on the H of direction.In each electrode assembly 2, it is assumed that each electrode assembly 2 with a thickness of THK, isolation film 23 beyond sun
The size of pole pole piece 21 is, then THK-5 < d < THK+5.
Each electrode assembly 2 leads the heat-fusible anode pole piece 21 for being fixed on the electrode assembly 2 of electrolyte layer 24 and cathode pole
The bottom surface in height direction H of piece 22.In this way, respectively leading electrolyte layer 24 and corresponding anode pole piece 21 and cathode sheet
22 bottom surface in height direction H is fused together, to respectively lead the isolation film of electrolyte layer 24 Yu each electrode assembly 2
23 anode pole piece 21 that is in provides transmission channel together with the part between cathode sheet 22 for the diffusion of electrolyte.
In order to guarantee isolation film 23 to the through performance (i.e. siphon effect of the isolation film 23 to electrolyte) of electrolyte, isolation
The porosity of film 23 can be 30%~50%.
In battery according to the present utility model, the thickness of isolation film 23 can be 9 μm~20 μm.The material of isolation film 23 can
For one of PE, PP.
Referring to Fig. 3 and Fig. 4, each electrode assembly 2 may also include that coating 25, on the surface coated in isolation film 23 and have
The channel that electrolysis liquid penetrates.Wherein, coating 25 can be coated on the one big face of isolation film 23, can also be coated in isolation simultaneously
On the big face of two of film 23.
The coating quality of coating 25 can be 3mg/cm2~5mg/cm2.Coating 25 with a thickness of 3 μm~10 μm.Coating 25 can
It is made of substance B, solvent C and substance D.
Substance B is generally inorganic matter, for increasing the roughness of isolation film 23, reducing the channel sized on coating 25 to mention
Isolation film 23 is risen to the imbibition ability of electrolyte, so as to accelerate diffusion of the electrolyte in isolation film 23.Specifically, substance B
It can be CaCl2、Al2O3、AlOOH、CaCO3、Na2CO3、MgO、NaAlO2One of or it is a variety of.
Solvent C is the substance of alkaline soluble materials B.Specifically, solvent C can be N-Methyl pyrrolidone (NMP), N, N- diformazan
One of base formamide (DMF), benzene, toluene, petroleum ether are a variety of.
Substance D is the mixture of some binders and is formed as polymer mesh structure (i.e. similar to the knot of isolation film 23
Structure), the channel that the electrolysis liquid for constructing coating 25 penetrates.Meanwhile substance D can also be by hot melting process by each electrode assembly
2 anode pole piece 21 for leading electrolyte layer 24 and the electrode assembly 2 and the bottom surface in height direction H of cathode sheet 22
It is fused together, so that respectively leading electrolyte layer 24 with the isolation film 23 of each electrode assembly 2 in anode pole piece 21 and yin
Part between pole pole piece 22 provides transmission channel together for the diffusion of electrolyte.Specifically, substance D can be Kynoar
(PVDF), polytetrafluoroethylene (PTFE) (PTFE), polyvinyl chloride (PVC), butadiene-styrene rubber (SBR), phenolic resin, epoxy resin, polyethylene
One of alcohol is a variety of.
Each electrode assembly 2 can be used winding method and be formed as coiled electrode assemblies.Wherein, each electrode assembly 2 is specific
Manufacturing process is described as follows.
Firstly, a certain amount of substance B is added in solvent C, and a certain amount of substance D is added in solvent C, thus shape
The mixed dispersion liquid (i.e. coating 25) for being 30%~60% at solid content；Then, coating 25 is coated on to the surface of isolation film 23
On；Then, anode pole piece 21, isolation film 23, cathode sheet 22 are superimposed and are wound into electrode assembly 2；Finally, by 1 or
The top alignment in the height direction H of multiple electrodes component 2, and the isolation film 23 of each electrode assembly 2 is in height side
At least part of lower part on H coats the anode pole piece 21 of the electrode assembly 2 and the place of cathode sheet 22 via bending
In the bottom surface in height direction H, then using 60 DEG C~100 DEG C temperature by the isolation film 23 and electrode assembly 2 after bending
The fusion of the bottom surface of anode pole piece 21 and cathode sheet 22 leads electrolyte layer 24 and makes two neighboring electrode group to be formed
At least part for leading electrolyte layer 24 of part 2 overlaps.Wherein, when the battery formed by coiled electrode assemblies is upright
When placement, the opening of each electrode assembly 2 is towards in height direction H.
Claims (9)
1. a kind of battery, comprising:
Shell (1)；
Electrolyte is contained in shell (1)；And
At least one electrode assembly (2), is contained in shell (1), and each electrode assembly (2) includes:
Anode pole piece (21)；
Cathode sheet (22)；And
Isolation film (23), between anode pole piece (21) and cathode sheet (22) and with anode pole piece (21), cathode sheet
(22) it is formed together electrode assembly (2), and isolation film (23) has hole so that electrolyte penetrates and diffuses to each electrode assembly
(2) on anode pole piece (21) and cathode sheet (22)；
It is characterized in that,
The lower part (23B) on short transverse (H) of the isolation film (23) of each electrode assembly (2) beyond anode pole piece (21) and
Cathode sheet (22), and the lower part (23B) of the isolation film (23) of each electrode assembly (2) beyond anode pole piece (21) and yin
At least part of pole pole piece (22) coats the anode pole piece (21) and cathode sheet (22) of the electrode assembly (2) via bending
The bottom surface on short transverse (H) led electrolyte layer (24) with being formed, and the conductive solution of two neighboring electrode assembly (2)
At least part of liquid layer (24) overlaps.
2. battery according to claim 1, which is characterized in that the isolation film (23) of each electrode assembly (2) is in height
At least part beyond anode pole piece (21) and cathode sheet (22) of lower part (23B) on direction (H) is along its length (L)
Bending and in the width direction (W) coat the electrode assembly (2) anode pole piece (21) and cathode sheet (22) be in height side
Electrolyte layer (24) are led on the bottom surface of (H) to be formed.
3. battery according to claim 1, which is characterized in that each electrode assembly (2) leads electrolyte layer (24) hot melt admittedly
Due to the anode pole piece (21) of the electrode assembly (2) and the bottom surface on short transverse (H) of cathode sheet (22).
4. battery according to claim 1, which is characterized in that the porosity of isolation film (23) is 30%~50%.
5. battery according to claim 1, which is characterized in that isolation film (23) with a thickness of 9 μm~20 μm.
6. battery according to claim 1, which is characterized in that each electrode assembly (2) further include: coating (25) is coated in
The channel penetrated on the surface of isolation film (23) and with electrolysis liquid.
7. battery according to claim 6, which is characterized in that the coating quality of coating (25) is 3mg/cm2~5mg/cm2。
8. battery according to claim 6, which is characterized in that coating (25) with a thickness of 3 μm~10 μm.
9. battery according to claim 1, which is characterized in that each electrode assembly (2) is coiled electrode assemblies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820366765.0U CN208256786U (en) | 2018-03-16 | 2018-03-16 | Battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820366765.0U CN208256786U (en) | 2018-03-16 | 2018-03-16 | Battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208256786U true CN208256786U (en) | 2018-12-18 |
Family
ID=64608181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820366765.0U Active CN208256786U (en) | 2018-03-16 | 2018-03-16 | Battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208256786U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020177738A1 (en) * | 2019-03-07 | 2020-09-10 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| WO2022170494A1 (en) * | 2021-02-09 | 2022-08-18 | 宁德时代新能源科技股份有限公司 | Electrode assembly and related battery, apparatus, manufacturing method, and manufacturing apparatus |
-
2018
- 2018-03-16 CN CN201820366765.0U patent/CN208256786U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020177738A1 (en) * | 2019-03-07 | 2020-09-10 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| WO2022170494A1 (en) * | 2021-02-09 | 2022-08-18 | 宁德时代新能源科技股份有限公司 | Electrode assembly and related battery, apparatus, manufacturing method, and manufacturing apparatus |
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