CN208078114U - A kind of battery - Google Patents
A kind of battery Download PDFInfo
- Publication number
- CN208078114U CN208078114U CN201820529781.7U CN201820529781U CN208078114U CN 208078114 U CN208078114 U CN 208078114U CN 201820529781 U CN201820529781 U CN 201820529781U CN 208078114 U CN208078114 U CN 208078114U
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- Prior art keywords
- battery
- area
- conductive sheet
- battery core
- kong
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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
Abstract
The utility model is related to battery technology fields, disclose a kind of battery, to reduce the short circuit phenomenon when battery is pierced or is crushed inside battery core, improve the rate of heat dissipation of battery.Battery includes：Shell；Battery core is set in shell；Conductive sheet is arranged between battery core and shell；Wherein battery core includes first electrode and second electrode, and first electrode includes the first collector and the first active material layer, and second electrode includes the second collector and the second active material layer；Battery core further includes the first empty foil with respect to area, first collector includes the first areas Kong Bo, the surface in the first areas Kong Bo is not provided with the first active material layer, second electrode includes the second areas Kong Bo, the surface in the second areas Kong Bo is not provided with the second active material layer, and the first areas Kong Bo form the first empty foil with respect to area towards the second areas Kong Bo；Wherein, along lug thickness direction, in the plane where conductive sheet, the first empty foil is not overlapped with respect to the projection in area and the projection of conductive sheet.
Description
Technical field
The utility model is related to battery technology fields, more particularly to a kind of battery.
Background technology
Lithium ion battery is widely used in each electronic product such as mobile terminal, electric tool, electric vehicle.Lithium from
Sub- battery includes mainly battery core and protection circuit plates, wherein for battery core as storage unit, primary structure includes positive plate, cathode
Piece, diaphragm and electrolyte.The quality of battery core directly determines the quality of lithium ion battery, is the heart of entire lithium ion battery.
Utility model content
The utility model embodiment provides a kind of battery, to reduce the short circuit when battery is pierced or is crushed inside battery core
Phenomenon improves the rate of heat dissipation of battery.
The utility model embodiment provides a kind of battery, including shell and the battery core that is set in the shell and
Conductive sheet, wherein：
The battery core includes first electrode and second electrode, and the first electrode includes the first collector and the first active matter
Matter layer, first active material layer are arranged on the surface of first collector, and the second electrode includes the second collector
With the second active material layer, second active material layer is arranged on the surface of second collector；
The battery core further includes the first empty foil with respect to area, and first collector includes the first areas Kong Bo, first sky
The surface in foil area is not provided with first active material layer, and the second electrode includes the second areas Kong Bo, the areas second Kong Bo
Surface be not provided with the second active material layer, the areas first Kong Bo form the described first empty foil phase towards the areas second Kong Bo
To area；
Wherein, along lug thickness direction, in the plane where the conductive sheet, the projection in the areas first Kong Bo and institute
The projection for stating conductive sheet is not overlapped；
In the above-described embodiments, optionally, the conductive sheet is connect with the inner wall of the shell, the conductive sheet with it is described
The connection type of inner wall includes being bonded or welded.
In the above-described embodiments, optionally, the battery core includes first area, and the first area is planar structure, institute
The first empty foil is stated to be electrically connected with the first area with respect to area, the conductive sheet be set to the first area and the shell it
Between.
In the above-described embodiments, optionally, along the battery core width direction, the described first empty foil is less than with respect to the width in area
Equal to the half of the battery core width.
In the above-described embodiments, optionally, the battery core includes second area, and the second area is planar structure, institute
It states second area and the first area is relatively arranged on the both sides of the battery core, the conductive sheet is arranged in the second area
Between the shell.
In the above-described embodiments, optionally, the conductive sheet includes Nian Jie with the connection type that the first area connects
Or welding.
In the above-described embodiments, optionally, the conductive sheet includes Nian Jie or weldering with the connection type of the second area
It connects.
In the above-described embodiments, optionally, orthographic projection of the conductive sheet on the first area is located at described first
In region.
In the above-described embodiments, optionally, the thickness of the conductive sheet is more than or equal to 4um, and is less than or equal to 50um.
In the above-described embodiments, optionally, the thickness of the conductive sheet is more than or equal to the 0.5 of the first afflux body thickness
Times, and the thickness of the conductive sheet is less than or equal to 3 times of the first afflux body thickness.
The battery that the utility model embodiment provides, on the outside of battery core, first sky in the first areas Kong Bo and the second areas Kong Bo
Foil is less than or equal to the half of battery core width with respect to the length in area, to improve the energy density of battery；When the battery is pierced
Or be crushed, since the resistance of conductive sheet is smaller, conductive sheet and the heat generated when battery core short circuit are less, so as to quickly
Consume the electric energy of battery core.Using the battery of the structure design, it is possible to reduce short inside battery core when battery is pierced or is crushed
Road phenomenon, to improve the rate of heat dissipation of battery.
Description of the drawings
Fig. 1 is the first structural schematic diagram of the utility model embodiment battery；
Fig. 2 is the structural schematic diagram of the utility model embodiment battery core；
Fig. 3 is second of structural schematic diagram of the utility model embodiment battery；
Fig. 4 is the third structural schematic diagram of the utility model embodiment battery；
Fig. 5 is the 4th kind of structural schematic diagram of the utility model embodiment battery；
Fig. 6 is the 5th kind of structural schematic diagram of the utility model embodiment battery；
Fig. 7 is the schematic diagram of the utility model embodiment battery core.
Reference numeral：
1- batteries；
11- shells；
12- battery cores；
13- conductive sheets；
121- first electrodes；
122- second electrodes；
123- isolation films；
The empty foils of 124- first are with respect to area；
125- flat surfaces；
The areas the first Kong Bo of 1211-；
The first active material layers of 1212-；
The areas the second Kong Bo of 1221-；
The second active material layers of 1222-.
Specific implementation mode
In order to reduce the short circuit phenomenon when battery is pierced or is crushed inside battery core, the rate of heat dissipation of battery, this reality are improved
A kind of battery is provided with new embodiment.To keep the purpose of this utility model, technical solution and advantage clearer, lift below
Embodiment is described in further detail the utility model.
The positive plate or negative plate of battery core include pole piece ontology and lug, wherein：Pole piece ontology include current collector layers and
The active material layer being set to outside current collector layers, and the areas Kong Bo for exposing current collector layers are provided on pole piece ontology, lug with
The areas Kong Bo of pole piece ontology connect, and are electrically connected with pole piece ontology to realize.
Common extreme ear structure is the foil of strip, and there are extending directions, lug to exist in the battery core for lug
Thickness direction, defines battery core width direction, and the battery core width direction is vertical with lug extending direction and lug thickness direction.
Experiment for lithium battery safety includes piercing through and being crushed.When lithium battery is pierced or is crushed, due to lithium electricity
Pond internal short-circuit generates amount of heat, easily leads to battery failure.In the prior art, in order to improve the safety of lithium battery, battery core
Ending at the current collector layers of positive plate and the current collector layers of negative plate would generally be extended and enclosed around battery core surface one, to increase
Add the short circuit of internal layer collector and outer layer collector, and improves the rate of heat dissipation of battery core.
However, the problems of the above-mentioned prior art is, the current collector layers of battery core lateral substantially reduce battery
Energy density；Simultaneously as there is empty foil or single side area between extended positive plate current collector layers and negative plate current collector layers,
Friction is small between current collector layers, easily leads to the displacement of empty set fluid layer or tearing, to battery short circuit problem occur.
As depicted in figs. 1 and 2, the utility model embodiment provides a kind of battery 1, including shell 11 and is set to
Battery core 12 in shell 11 and conductive sheet 13, wherein：Battery core 12 includes the first electrode 121 and second electrode 122 of winding setting,
And the isolation film 123 of interval first electrode 121 and second electrode 122, first electrode 121 include being located at 12 outer surface of battery core
And an at most side surface is provided with the first areas Kong Bo 1211 of the first active material layer 1212, second electrode 122 includes and first
The areas Kong Bo 1211 are adjacent and an at most side surface is provided with the second areas Kong Bo 1221 of the second active material layer 1222, the first empty foil
The first empty foil opposite with 1221 position of the second areas Kong Bo of area 1211 is less than or equal to electricity with respect to the width (L as shown in the figure) in area 124
The half of 12 width of core (D as shown in the figure)；Conductive sheet 13 is set between 11 inner wall of shell and battery core 12, along lug thickness direction
On, in the plane where conductive sheet 13, the projection of the conductive sheet 13 is not be overlapped with the projection in the areas first Kong Bo 1221.
The battery 1 that the utility model embodiment provides, in 12 outside of battery core, the first areas Kong Bo 1211 and the second areas Kong Bo
The empty foil of the first of 1221 is less than or equal to the half of 12 width of battery core with respect to the length in area 124, to which the energy for improving battery 1 is close
Degree；When the battery 1 is pierced or is crushed, since the resistance of conductive sheet 13 is smaller, conductive sheet 13 generates when short-circuit with battery core 12
Heat it is less, so as to consume the electric energy of battery core quickly.Using the battery of the structure design, it is possible to reduce when battery 1
Short circuit phenomenon when being pierced or being crushed inside battery core 12, to improve the rate of heat dissipation of battery 1.
In the above-described embodiments, optionally, the specific material of conductive sheet 13 is unlimited, such as can be copper sheet or aluminium flake.?
In the embodiments of the present invention, when battery 1 is pierced or is crushed, conductive sheet 13 is connect with 12 short circuit of battery core, conductive sheet
13 selection metals are made, such as copper, aluminium, alloy or other metal materials.In the present embodiment, since battery 1 is pierced
Or when being crushed, conductive sheet 13 is likely to occur burr, in order to improve the probability of 13 short circuit of conductive sheet, it is preferred that conductive sheet 13 is adopted
With the preferable material of ductility, for example, metal material of the elongation between 0.3%~5%.
As shown in Fig. 2, in an embodiment of the utility model, optionally, the outside of battery core 12 has perpendicular to winding
Opposite two flat surfaces 125 in direction and position, are first area and second area respectively, the first empty foil with respect to area 124 and
Two flat surfaces 125 are oppositely arranged.
As shown in Figures 2 to 6, in the above-described embodiments, optionally, at least one outside of two flat surfaces 125
It is provided with conductive sheet 13.
In the embodiments of the present invention, the specific set-up mode of conductive sheet 13 is unlimited, for example, optionally, conductive sheet
13 connect with 11 inner wall of shell, as shown in Figure 2；Alternatively, optional, conductive sheet 13 is connect with battery core 12, as shown in Figure 3.
In the above-described embodiments, the specific connection type of conductive sheet 13 and shell 11 and conductive sheet 13 and battery core 12 is not
Limit, such as can be to be bonded or welded.
As shown in Figures 4 to 6, in the above-described embodiments, optionally, two flat surfaces 125 are respectively arranged with conductive sheet
13.Conductive sheet 13 can be connect with 11 inner wall of shell, as shown in Figure 4 and Figure 5；Alternatively, conductive sheet 13 can be connect with battery core 12,
As shown in Figure 5 and Figure 6.
As shown in fig. 6, in the embodiments of the present invention, it is preferred that two flat surfaces 125 are respectively arranged with conduction
Piece 13, and conductive sheet 13 is connect with corresponding flat surfaces 125.Using the structure design, conductive sheet 13 and 12 short circuit of battery core
Each conductive sheet 13 is directly connect with corresponding flat surfaces 125 when connection, so as to quickly consume electric energy, reduces electricity
Short circuit phenomenon inside core 12.
As shown in fig. 7, in the above-described embodiments, optionally, orthographic projection of the conductive sheet 13 on flat surfaces 125 is located at flat
In smooth surface 125.Using the structure design, it can prevent the edge of conductive sheet 13 from exceeding battery core 12, conductive sheet 13 is avoided to scratch
Battery core 12 or shell 11.
In any of the above-described embodiment, optionally, the thickness of conductive sheet 13 is more than or equal to 4um, and is less than or equal to 50um.When
When the thickness of conductive sheet 13 is less than 4um, the thickness of conductive sheet 13 is too thin, can not achieve preferable electricity when being connect with 12 short circuit of battery core
Conducting；When the thickness of conductive sheet 13 is more than 50um, the thickness of conductive sheet 13 is too thick, reduces the energy density of battery 1.Cause
This in the range by the thickness setting of conductive sheet 13, can improve conductive sheet 13 short-circuit with battery core 12 in the present embodiment
Electric conductivity when connection, and keep the energy density of battery 1 preferable.
In any embodiment of the utility model, the concrete type of battery 1 is unlimited, such as can be lithium battery or electric power storage
Pond.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (10)
1. a kind of battery, which is characterized in that including：
Shell；
Battery core is set in the shell；
Conductive sheet is arranged between the battery core and the shell；
The wherein described battery core includes first electrode and second electrode, and the first electrode includes the first collector and the first active matter
Matter layer, first active material layer are arranged on the surface of first collector, and the second electrode includes the second collector
With the second active material layer, second active material layer is arranged on the surface of second collector；
The battery core further includes the first empty foil with respect to area, and first collector includes the first areas Kong Bo, the areas first Kong Bo
Surface be not provided with first active material layer, the second electrode includes the second areas Kong Bo, the table in the areas second Kong Bo
Face is not provided with the second active material layer, and it is opposite that the areas first Kong Bo towards the areas second Kong Bo form the described first empty foil
Area；
Wherein, it along lug thickness direction, in the plane where the conductive sheet, the projection in the areas first Kong Bo and described leads
The projection of electric piece is not overlapped.
2. battery as described in claim 1, which is characterized in that the conductive sheet is connect with the inner wall of the shell, described to lead
The connection type of electric piece and the inner wall includes being bonded or welded.
3. battery as described in claim 1, which is characterized in that the battery core includes first area, and the first area is flat
Face structure, the first empty foil are electrically connected with respect to area with the first area, the conductive sheet be set to the first area and
Between the shell.
4. battery as claimed in claim 3, which is characterized in that along the battery core width direction, the described first empty foil is with respect to area
Width be less than or equal to the battery core width half.
5. battery as claimed in claim 3, which is characterized in that the battery core includes second area, and the second area is flat
Face structure, the second area and the first area are relatively arranged on the both sides of the battery core, and the conductive sheet is arranged in institute
It states between second area and the shell.
6. battery as claimed in claim 3, which is characterized in that the connection type that the conductive sheet is connect with the first area
Including being bonded or welded.
7. battery as claimed in claim 5, which is characterized in that the connection type of the conductive sheet and the second area includes
It is bonded or welded.
8. battery as claimed in claim 6, which is characterized in that orthographic projection of the conductive sheet on the first area is located at
In the first area.
9. battery as described in claim 1, which is characterized in that the thickness of the conductive sheet is more than or equal to 4um, and is less than or equal to
50um。
10. battery as claimed in claim 9, which is characterized in that the thickness of the conductive sheet is more than or equal to first afflux
0.5 times of body thickness, and the thickness of the conductive sheet is less than or equal to 3 times of the first afflux body thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820529781.7U CN208078114U (en) | 2018-04-13 | 2018-04-13 | A kind of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820529781.7U CN208078114U (en) | 2018-04-13 | 2018-04-13 | A kind of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208078114U true CN208078114U (en) | 2018-11-09 |
Family
ID=64041087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820529781.7U Active CN208078114U (en) | 2018-04-13 | 2018-04-13 | A kind of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208078114U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039080A (en) * | 2021-11-05 | 2022-02-11 | 宁德新能源科技有限公司 | Electricity core, battery and power consumption device |
| WO2024041080A1 (en) * | 2022-08-23 | 2024-02-29 | 珠海冠宇电池股份有限公司 | Wound core and battery |
-
2018
- 2018-04-13 CN CN201820529781.7U patent/CN208078114U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039080A (en) * | 2021-11-05 | 2022-02-11 | 宁德新能源科技有限公司 | Electricity core, battery and power consumption device |
| CN114039080B (en) * | 2021-11-05 | 2022-07-19 | 宁德新能源科技有限公司 | Electricity core, battery and power consumption device |
| WO2024041080A1 (en) * | 2022-08-23 | 2024-02-29 | 珠海冠宇电池股份有限公司 | Wound core and battery |
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| GR01 | Patent grant |