CN216054838U - Core package and battery - Google Patents

Core package and battery Download PDF

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Publication number
CN216054838U
CN216054838U CN202122270378.1U CN202122270378U CN216054838U CN 216054838 U CN216054838 U CN 216054838U CN 202122270378 U CN202122270378 U CN 202122270378U CN 216054838 U CN216054838 U CN 216054838U
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negative
positive
active coating
core package
positive electrode
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CN202122270378.1U
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李文文
李�学
刘峰
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Tianjin EV Energies Co Ltd
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Tianjin EV Energies Co Ltd
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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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The utility model discloses a core package and a battery, wherein the core package comprises a positive plate, a diaphragm and a negative plate which are arranged in a stacking mode, the positive plate comprises a positive current collector, a positive active coating area is arranged on the positive current collector, the negative plate comprises a negative current collector, and a negative active coating area is arranged on the negative current collector. The positive electrode exposed area on the positive electrode current collector and/or the negative electrode exposed area on the negative electrode current collector are/is contacted with the shell of one battery in the positive electrode exposed area and the negative electrode exposed area. The core bag can rapidly transfer heat to the shell of the battery, the heat conduction capability of the core bag is increased, the thermal field effect of the core bag is reduced, and therefore the quick charging capability and the service life of the battery are improved.

Description

Core package and battery
Technical Field
The utility model relates to the technical field of battery equipment, in particular to a core cladding and a battery.
Background
Most of the core packages of the winding cores in the batteries in the prior art are manufactured in a winding or lamination mode, the outermost rings of the core packages are made of plastic materials, insulating coatings are arranged on the surfaces of part of the insulating films, and the surrounding insulating films of the core packages of the winding cores are in direct contact with the outermost packaging materials, such as shells of aluminum shells. Because the thermal conductivity coefficient of the isolating film is very low, the isolating film around the core package forms a barrier for outward conduction of central heat, the path for transferring the heat in the battery to the external aluminum shell is blocked, and the heat generated in the charging and discharging process of the battery cannot be transferred to the shell with better thermal conductivity in time, so that the thermal field in the battery is uneven, the attenuation of the battery is accelerated, the quick charging capability of the battery is limited, the electric quantity of the whole vehicle can only be improved in order to meet the cruising capability of the whole vehicle, and the product cost is increased.
SUMMERY OF THE UTILITY MODEL
The first objective of the present invention is to provide a core package, which can rapidly transfer heat to a casing of a battery, increase the thermal conductivity of the core package, and reduce the thermal field effect of the core package, thereby improving the rapid charging capability and the service life of the battery.
The second purpose of the utility model is to provide a battery which has better quick charging performance and longer service life.
In order to achieve the technical effects, the technical scheme of the utility model is as follows:
the utility model discloses a core cladding, which comprises a positive plate, a diaphragm and a negative plate which are arranged in a laminated manner, wherein the positive plate comprises a positive current collector, a positive active coating area is arranged on the positive current collector, the negative plate comprises a negative current collector, a negative active coating area is arranged on the negative current collector, and an insulating coating area is arranged on one of the positive current collector and the negative current collector: wherein: an anode exposed area on the anode current collector and/or a cathode exposed area on the cathode current collector; the positive electrode exposed area and the negative electrode exposed area are in contact with the case of one of the cells.
In some embodiments, the separator covers one of the positive electrode tab and the negative electrode tab.
In some embodiments, the positive electrode bare region is located outside the positive electrode active coating region.
In some specific embodiments, the positive electrode bare region is located on both sides of the positive electrode active coating region and is symmetrically arranged.
In some embodiments, the negative electrode bare region is located outside the negative electrode active coating region.
In some specific embodiments, the anode bare region is located on both sides of the anode active coating region and is symmetrically arranged.
In some embodiments, the positive current collector is an aluminum foil and the negative current collector is a copper foil.
In some embodiments, a projection of the positive active coating region in a vertical direction coincides with a projection of the negative active coating region in a vertical direction; or the projection of the positive electrode active coating region in the vertical direction is inside the projection of the negative electrode active coating region in the vertical direction.
In some embodiments, one of the positive electrode current collector and the negative electrode current collector is provided with an insulating coating region thereon.
The utility model also discloses a battery, which comprises the core bag and the shell, wherein the core bag is arranged in the shell, and the shell in the positive pole exposed area is contacted with the shell in the negative pole exposed area.
The core bag has the advantages that: because the exposed region of positive pole on the positive pole mass flow body or the exposed region of negative pole on the negative pole mass flow body, and the casing contact of a battery in the exposed region of positive pole and the exposed region of negative pole, can be rapidly with the inside heat conduction that produces of core package especially core package central area charge-discharge process to the casing of battery on, in order to realize electric core self quick heat dissipation, avoided core package heavy current charge-discharge process effectively because the whole coefficient of heat conductivity of core package is lower leads to the phenomenon that the core package temperature is too high, increase the heat conductivity of core package, reduce core package thermal field effect, thereby improve the ability of filling soon and life of battery.
The battery of the utility model has the following beneficial effects: due to the fact that the core bag is arranged, the shell in the positive pole exposed area of the positive pole piece and the negative pole exposed area of the negative pole piece is contacted, heat generated in the charging and discharging process in the core bag can be conducted to the shell of the battery to dissipate heat of the battery core rapidly, the temperature rise of the core bag is reduced, the quick charging performance of the battery is improved, and the service life of the battery is prolonged.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
Fig. 1 is a schematic structural diagram of a first negative electrode sheet of a core package according to an embodiment of the utility model;
fig. 2 is a schematic structural diagram of a second negative electrode sheet of the core package according to the embodiment of the utility model;
fig. 3 is a schematic structural view of a third negative electrode sheet of the core pack according to the embodiment of the utility model;
fig. 4 is a schematic structural diagram of a fourth negative electrode sheet of the core pack according to the embodiment of the utility model;
fig. 5 is a schematic structural diagram of a first positive electrode sheet of the core package according to the embodiment of the utility model;
fig. 6 is a schematic structural diagram of a second positive electrode sheet of the core package according to the embodiment of the utility model;
fig. 7 is a schematic structural diagram of a third positive electrode sheet of the core package according to the embodiment of the utility model;
fig. 8 is a schematic structural view of a fourth positive electrode tab of the core package according to the embodiment of the utility model;
fig. 9 is a schematic structural diagram of a positive plate of a core package according to a first embodiment of the utility model;
fig. 10 is a schematic structural diagram of a negative electrode sheet of a core package according to a first embodiment of the utility model;
fig. 11 is a schematic structural diagram of a core package according to a first embodiment of the utility model;
fig. 12 is a schematic structural diagram of a positive electrode sheet of a core package according to a second embodiment of the utility model;
fig. 13 is a schematic structural diagram of a negative electrode sheet of a core package according to a second embodiment of the utility model;
fig. 14 is a schematic structural diagram of a core package according to a second embodiment of the present invention;
fig. 15 is a schematic structural diagram of a positive plate of a core package according to a third embodiment of the present invention;
fig. 16 is a schematic structural diagram of a negative electrode sheet of a core package according to a third embodiment of the utility model;
fig. 17 is a schematic structural diagram of a three-core bag according to an embodiment of the present invention.
Reference numerals:
1. a negative terminal; 2. a negative active coating region; 3. a negative electrode bare region; 4. a positive terminal; 5. a positive active coating region; 6. an anode exposed region; 7. an insulating coating region; 8. a diaphragm.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific structure of the core package of the embodiment of the present invention is described below with reference to fig. 1 to 8.
The utility model discloses a core cladding, which comprises a positive plate, a diaphragm 8 and a negative plate which are arranged in a stacking mode, wherein the positive plate comprises a positive current collector, as shown in figures 1-4, a positive active coating area 5 is arranged on the positive current collector, the negative plate comprises a negative current collector, as shown in figures 5-8, a negative active coating area 2 is arranged on the negative current collector. The positive electrode exposed area 6 on the positive electrode current collector and/or the negative electrode exposed area 3 on the negative electrode current collector, and the positive electrode exposed area 6 is in contact with the shell of one battery in the negative electrode exposed area 3. It can be understood that, because one of the positive pole exposed area 6 and the negative pole exposed area 3 contacts with the casing of battery, can utilize the higher characteristics of metal material coefficient of heat conductivity like this, with the inside casing of the core package especially the casing of the regional charge-discharge process production of core package center rapidly, carry out electric core self heat dissipation, reduced core package heavy current charge-discharge process effectively because the lower core package temperature that leads to of the whole coefficient of heat conductivity of core package is too high to the quick charge performance of battery has been promoted.
It should be additionally noted that in the present embodiment, the shapes and sizes of the positive electrode current collector, the negative electrode current collector, the positive electrode active coating region 5, the negative electrode active coating region 2, the positive electrode exposed region 6 and the negative electrode exposed region 3 may be selected according to actual needs, and are not limited herein. The positive electrode tab and the negative electrode tab may have the same size or different sizes, and may be selected according to actual needs. It should be noted that the number and position of the positive terminals 4 on the positive electrode sheet may be selected as needed, and the number and sequential position of the negative terminals 1 on the negative electrode sheet may be selected as needed, and the number and position of the positive terminals 4 and the negative terminals 1 are not limited herein.
In some embodiments, the separator 8 covers one of the positive electrode tab and the negative electrode tab. It should be noted that, in actual use, if the exposed positive electrode region 6 is in contact with the case, the positive electrode current collector needs to extend beyond the separator 8 and the negative electrode tab. In order to avoid the case from contacting the positive electrode tab and the negative electrode tab at the same time to form a short circuit, it is necessary to cover the negative electrode tab with the separator 8. Similarly, if the exposed region 3 of the negative electrode is in contact with the case, the negative electrode current collector needs to extend beyond the separator 8 and the positive electrode sheet. In order to avoid the case from contacting the positive electrode tab and the negative electrode tab at the same time to form a short circuit, it is necessary to cover the positive electrode tab with the separator 8. It can be understood that, in this embodiment, the diaphragm 8 covers one of the positive plate and the negative plate, so that on the premise of ensuring that the heat dissipation capability of the core package is improved, the case of the battery is prevented from being in contact with the positive plate and the negative plate at the same time to cause short circuit, and thus the reliability of the battery is improved.
In some embodiments, the positive electrode bare region 6 is located outside the positive electrode active coating region 5, as shown in fig. 5-8. It can be understood that if the positive electrode exposed area 6 is disposed inside the positive electrode active coating area 5, an additional heat conducting member needs to be disposed on the positive electrode exposed area 6 to connect the positive electrode exposed area 6 with the case of the battery, which not only increases the complexity of the core package, but also reduces the reliability of the core package. In this embodiment, the arrangement of the positive electrode exposed area 6 outside the positive electrode active coating area 5 enables the positive electrode exposed area 6 to directly contact with the shell of the battery, so that a heat conducting piece arranged independently is not needed, the heat dissipation effect of the core bag is ensured, the structure of the core bag is simplified, and the reliability of the core bag is improved.
In some specific embodiments, the positive electrode bare region 6 is positioned on both sides of the positive electrode active coating region 5 and is symmetrically arranged, as shown in fig. 8. Therefore, the two opposite side walls of the shell can be contacted simultaneously, so that the heat conduction area of the anode exposed area 6 can be increased, and the heat dissipation efficiency of the core bag is improved.
It should be additionally noted that the outside of the positive electrode active coating region 5 where the positive electrode exposed region 6 can be disposed can be specifically selected according to actual needs, and is not limited to the above description. Advantageously, in order to ensure the conduction between the positive electrode terminal 4 and the positive electrode active coating region 5, the position where the positive electrode active coating region 5 communicates with the positive electrode terminal 4 is avoided as much as possible when the positive electrode exposed region 6 is provided.
In some embodiments, the anode bare region 3 is located outside the anode active coating region 2, as shown in fig. 1-4. It can be understood that if the negative electrode exposed area 3 is disposed on the inner side of the negative electrode active coating area 2, an additional heat conducting member needs to be disposed on the negative electrode exposed area 3 to connect the negative electrode exposed area 3 with the case of the battery, which not only increases the complexity of the core package, but also reduces the reliability of the core package. In this embodiment, the exposed region 3 of negative pole is located the regional 2 outsides of negative pole active coating and sets up and can make the exposed region 3 of negative pole can directly contact with the casing of battery to need not a heat-conducting piece that sets up alone, simplified the structure of core package when guaranteeing the core package radiating effect, promoted the reliability of core package.
In some specific embodiments, as shown in fig. 4, the anode bare regions 3 are located on both sides of the anode active coating region 2 and are symmetrically arranged. From this, can contact two relative lateral walls that set up of casing simultaneously, can promote the heat conduction area of the exposed region 3 of negative pole like this to promote the radiating efficiency of core package.
It should be additionally noted that the outside of the anode active coating region 2 where the anode exposed region 3 can be disposed may be specifically selected according to actual needs, and is not limited to the above description. Advantageously, in order to ensure conduction between the negative electrode terminal 1 and the negative electrode active coating region 2, the position where the negative electrode active coating region 2 communicates with the negative electrode terminal 1 is avoided as much as possible when the negative electrode exposed region 3 is provided.
In some embodiments, the positive current collector is aluminum foil and the negative current collector is copper foil. It is understood that the materials of the positive electrode collector and the negative electrode collector may be any other materials according to the materials of the positive electrode post and the negative electrode post of the battery, and are not limited to the aluminum foil and the copper foil of the embodiment.
In some embodiments, the projection of the positive electrode active coating region 5 in the vertical direction coincides with the projection of the negative electrode active coating region 2 in the vertical direction. Or the projection of the positive electrode active coating region 5 in the vertical direction is inside the projection of the negative electrode active coating region 2 in the vertical direction. It is understood that in practical design, the size relationship may be separator 8 size > negative electrode active coating region 2 > positive electrode active coating region 5, or separator 8 size > negative electrode active coating region 2 ═ positive electrode active coating region 5, or negative electrode active coating region 2 > separator 8 size > positive electrode active coating region 5; the anode active coating region 2 > the separator 8 size ═ the cathode active coating region 5; the size of the separator 8 may be such that the negative electrode active coating region 2 > the positive electrode active coating region 5. In the embodiment of the present invention, the sizes of the positive electrode active coating region 5 and the negative electrode active coating region 2 may be selected according to the actual needs of the core pack.
In some embodiments, one of the positive and negative current collectors is provided with an insulating coating region 7. It can be understood that, according to the foregoing, one of the positive electrode current collector and the negative electrode current collector needs to be in contact with the case of the battery so as to improve the heat dissipation capability of the core package, and in order to avoid the case of the battery being in conduction with the positive electrode current collector and the negative electrode current collector at the same time, it is necessary to ensure that the other of the positive electrode current collector and the negative electrode current collector is isolated from the case. In this embodiment, thereby when the heat-sinking capability of the casing contact promotion core package of one in the anodal mass flow body and the negative current collector, just set up insulating coating region 7 on another mass flow body, can guarantee like this that the terminal on this mass flow body and the utmost point post connection in-process of battery and the direct basis of casing, avoided the casing of battery to lead to the phenomenon with anodal mass flow body and negative current collector simultaneously.
Three specific embodiments of the core package structure of the present invention are described below with reference to fig. 9-17.
The first embodiment is as follows:
as shown in fig. 9-11, the core package of the present embodiment includes a positive electrode sheet, a separator 8 and a negative electrode sheet, which are stacked, the positive electrode sheet includes a positive electrode current collector, a positive electrode active coating area 5 and an insulating coating area 7 are disposed on the positive electrode current collector, the insulating coating area 7 is located on the left side of the positive electrode active coating area 5, and a positive electrode terminal 4 is disposed on the left side of the insulating coating area 7. The negative pole piece includes the negative pole mass flow body, is equipped with negative pole active coating region 2 and negative pole naked region 3 on the negative pole mass flow body, and negative pole naked region 3 establishes in the regional below of 2 of negative pole active coating, and the regional 2 right sides of negative pole active coating sets up negative terminal 1. The diaphragm 8 is arranged between the positive plate and the negative plate, and the size of the diaphragm 8 is larger than the negative active coating area 2 and larger than the positive active coating area 5. The bottom of the cathode exposed region 3 extends beyond the separator 8 and is in contact with the case of the battery.
Example two:
as shown in fig. 12 to 14, the core package of the present embodiment includes a positive electrode sheet, a separator 8 and a negative electrode sheet, which are stacked, the positive electrode sheet includes a positive electrode collector, a positive electrode active coating region 5 and an insulating coating region 7 are disposed on the positive electrode collector, the insulating coating region 7 is located on the left side of the positive electrode active coating region 5, and a positive electrode terminal 4 is disposed on the left side of the insulating coating region 7. The negative pole piece includes the negative pole mass flow body, is equipped with negative pole active coating region 2 and two negative pole naked regions 3 on the negative pole mass flow body, and a negative pole naked region 3 is established in the regional below of 2 of negative pole active coating, and another negative pole naked region 3 is established in the regional top of 2 of negative pole active coating, and the regional 2 right sides of negative pole active coating sets up negative terminal 1. The diaphragm 8 is arranged between the positive plate and the negative plate, and the size of the diaphragm 8 is larger than the negative active coating area 2 and larger than the positive active coating area 5. The bottom of the negative electrode bare region 3 located below the negative electrode active coating region 2 exceeds the separator 8 and is in contact conduction with one side of the case of the battery. The top of the negative electrode bare region 3 above the negative electrode active coating region 2 extends beyond the separator 8 and is in contact with the other side of the cell's casing.
Example three:
as shown in fig. 15-17, the core package of this embodiment includes a positive plate, a separator 8 and a negative plate, which are stacked, the positive plate includes a positive current collector, a positive active coating area 5, two insulating coating areas 7 and a positive bare area 6 are disposed on the positive current collector, one insulating coating area 7 is located on the top of the positive active coating area 5, a positive terminal 4 is disposed on the top of the insulating coating area 7, the other insulating coating area 7 is located on the bottom of the positive active coating area 5, and the positive bare area 6 is disposed below the insulating coating area 7. The negative pole piece includes the negative pole mass flow body, is equipped with negative pole active coating region 2 on the negative pole mass flow body, and negative terminal 1 is set up on regional 2 upper portions of negative pole active coating. The separator 8 is disposed between the positive electrode sheet and the negative electrode sheet, and the size of the separator 8 > the negative electrode active coating region 2 ═ the positive electrode active coating region 5. The bottom of the exposed region of the positive electrode, which is located below the positive electrode active coating region 5, exceeds the separator 8 and is in contact conduction with one side of the case of the battery.
The charging is carried out at a current 2.5 times of the rated capacity of the battery, the temperature rise results of the first to third examples and the core package in the prior art are shown as the following table, taking the highest temperature in the charging process:
temperature rise at different positions Prior Art Example one Example two EXAMPLE III
Upper left of core bag 19℃ 14℃ 11℃ 15℃
Upper right part of core bag 23℃ 16℃ 13℃ 16℃
The middle lower part of the core bag 21℃ 14℃ 12℃ 16℃
As can be seen from the above table, the temperature rise in the first to third embodiments is smaller than that in the prior art, so that the heat dissipation effect of the core package of the present embodiment is better than that in the prior art.
The advantages of the core package of the first to third embodiments are: the metal current collector is partially covered on the pole piece by adopting a polar active substance, and the metal part of the current collector which is not coated with the active substance exceeds the size of the diaphragm 8 and exceeds the size of the other polar pole piece simultaneously, so that the metal exposed part of the current collector (the positive electrode exposed area 6 or the negative electrode exposed area 3) is directly contacted with the shell of the battery. Utilize the higher characteristics of metal material coefficient of heat conductivity like this, conduct the heat that the inside especially central region charge-discharge process of core package produced to the casing rapidly, carry out core package self heat dissipation, effectively reduce the core package heavy current charge-discharge process because the core package temperature that the whole coefficient of heat conductivity of core package is lower leads to is too high to improve the ability of filling soon of battery, increase of service life. And the promotion of the quick charge performance can effectively relieve the anxiety of the customer to the endurance, the electric quantity of the whole electric vehicle can be reduced to a certain degree, the quick endurance of the quick charge performance is utilized, the endurance capacity is increased, and the cost of the whole electric vehicle is reduced.
The utility model also discloses a battery, which comprises the core bag and the shell, wherein the core bag is arranged in the shell, and one of the positive pole exposed area 6 and the negative pole exposed area 3 is in contact with the shell.
The battery provided by the utility model is provided with the core bag, and one of the anode exposed area 6 of the anode plate and the cathode exposed area 3 of the cathode plate is in contact with the shell, so that heat generated in the charging and discharging processes in the core bag can be rapidly conducted to the shell of the battery to dissipate heat of the battery core, the temperature rise of the core bag is reduced, and the improved quick charging performance is improved.
In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. The utility model provides a core package, its characterized in that, positive plate, diaphragm and negative pole piece including range upon range of setting, positive plate includes the anodal mass flow body, it is regional to be equipped with anodal active coating on the anodal mass flow body, the negative pole piece includes the negative pole mass flow body, it is regional to be equipped with negative pole active coating on the negative pole mass flow body: wherein:
an anode exposed area on the anode current collector and/or a cathode exposed area on the cathode current collector;
the positive electrode exposed area and the negative electrode exposed area are in contact with the case of one of the cells.
2. The core package of claim 1, wherein the separator covers one of the positive and negative electrode tabs.
3. The core package of claim 1, wherein the positive electrode bare area is outside the positive electrode active coating area.
4. The core package of claim 3, wherein the positive electrode bare areas are symmetrically disposed on both sides of the positive electrode active coating area.
5. The core package of claim 1, wherein the negative electrode bare areas are outside the negative electrode active coating areas.
6. The core package of claim 5, wherein the negative electrode bare areas are located on both sides of the negative electrode active coating area and are symmetrically arranged.
7. The core package of any of claims 1-6, wherein the positive current collector is aluminum foil and the negative current collector is copper foil.
8. The core package of any of claims 1-6, wherein a projection of the positive active coating area in a vertical direction coincides with a projection of the negative active coating area in a vertical direction; or the projection of the positive electrode active coating region in the vertical direction is inside the projection of the negative electrode active coating region in the vertical direction.
9. The core package of any of claims 1-6, wherein one of the positive and negative current collectors is provided with an insulating coating region thereon.
10. A battery comprising the core package of any of claims 1-9 and a casing, the core package being disposed within the casing, one of the exposed positive and negative regions being in contact with the casing.
CN202122270378.1U 2021-09-18 2021-09-18 Core package and battery Active CN216054838U (en)

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Application Number Priority Date Filing Date Title
CN202122270378.1U CN216054838U (en) 2021-09-18 2021-09-18 Core package and battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122270378.1U CN216054838U (en) 2021-09-18 2021-09-18 Core package and battery

Publications (1)

Publication Number Publication Date
CN216054838U true CN216054838U (en) 2022-03-15

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