CN219267841U - Battery cell and battery - Google Patents
Battery cell and battery Download PDFInfo
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- CN219267841U CN219267841U CN202320086748.2U CN202320086748U CN219267841U CN 219267841 U CN219267841 U CN 219267841U CN 202320086748 U CN202320086748 U CN 202320086748U CN 219267841 U CN219267841 U CN 219267841U
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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 battery cell and a battery, wherein the battery cell comprises a battery cell main body and a diaphragm extension part; the diaphragm extension part is formed by a diaphragm extending from the battery cell main body, and the diaphragm extension part is folded and covers two sides of the battery cell main body in the width direction; the battery cell is including being located the first side and the second side in the outside, and first side and second side are along the relative setting of thickness direction of battery cell, are provided with the glue film on the diaphragm extension of first side, and the glue film turns over to on the diaphragm extension of second side, and the glue film parcel diaphragm extension. According to the utility model, the diaphragm extension parts are folded to two sides of the battery cell main body in the width direction, and the diaphragm extension parts are wrapped by the adhesive layers, so that the diaphragm extension parts are tightly attached to two sides of the battery cell main body in the width direction under the constraint of the adhesive layers, the limiting effect on the pole pieces in the battery cell main body can be realized, the pole pieces are prevented from sliding relative to the diaphragm, and the dislocation of the pole pieces in the battery cell main body and the slipping of the pole pieces from the two sides of the battery cell main body can be avoided.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery cell and a battery.
Background
The lithium ion battery has the advantages of high energy density, high power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like.
The quality is improved, the cost is reduced, and the long-term market competitiveness of the new energy automobile is guaranteed. The power battery is used as a core component of the new energy automobile, and the cost control is particularly important. In the structure of the lithium ion battery, the diaphragm is one of the key inner layer components, the cost of the diaphragm has a larger influence on the overall price of the battery, wherein the dry PP (polypropylene) diaphragm has larger advantages in the aspects of processing efficiency, cost, safety and the like, accords with the development trend of the market, and the application proportion of the diaphragm is increased year by year.
Because the surface of the dry-method diaphragm is not coated with an adhesive layer, hot melt bonding can not occur between the pole piece and the diaphragm after hot pressing, and a hot pressing station can be canceled, so that no constraint force is caused between the pole piece and the diaphragm, and the situation that the pole piece is misplaced and slides out from the side surface of the diaphragm easily occurs in the lamination process and the subsequent transfer process. In addition, the Transverse (TD) direction of the dry-method diaphragm is basically unchanged in the processing and manufacturing process, the longitudinal (MD) direction is stretched, so that anisotropy exists in the TD and MD directions of the dry-method diaphragm, stress non-uniformity exists in the two directions, the transverse tensile strength is lower, diaphragm tearing failure can occur on two sides of a battery core in the battery core production process, the safety performance of a battery is affected, the positive and negative plates are directly caused to contact and short circuit due to serious tearing, and a safety accident of battery core ignition occurs.
Disclosure of Invention
The utility model solves the problems that in the prior art, a battery cell adopting a dry diaphragm is easy to cause dislocation of a pole piece and the condition that diaphragms are extended from two sides of the battery cell in the production process, and the short circuit phenomenon caused by diaphragm tearing on two sides of the battery cell.
To solve the above problems, a first aspect of the present utility model provides a battery cell, including a battery cell main body and a diaphragm extension;
the diaphragm extending part is formed by a diaphragm extending from the battery cell main body, and the diaphragm extending part is folded and covers two sides of the battery cell main body in the width direction;
the battery cell comprises a first side and a second side which are positioned at the outermost side, the first side and the second side are oppositely arranged along the thickness direction of the battery cell, a glue layer is arranged on the diaphragm extension part of the first side, the glue layer is folded to the diaphragm extension part of the second side, and the glue layer wraps the diaphragm extension part.
Further, the battery cell main body comprises N layers of diaphragms, N is larger than 1 and N is an integer, the N layers of diaphragms are arranged in a stacked mode, each layer of diaphragm is provided with a diaphragm extension part, and the width of each layer of diaphragm extension part is gradually reduced along the thickness direction of the battery cell.
Further, the N-th layer of the diaphragm is disposed on the first side, the first layer of the diaphragm is disposed on the second side, the widths of the diaphragm extending portions of each layer are sequentially reduced in an equi-differential order from the N-th layer of the diaphragm to the first layer of the diaphragm, and the width difference of any two adjacent layers of the diaphragm extending portions is Δl, Δl= (W) N -W 1 ) /(N-1) where W N To be positioned at the N layer, the width of the extending part of the diaphragm is W 1 Is the width of the diaphragm extension at the first layer.
Further, when N is greater than or equal to 2, the width of the N-th layer of the diaphragm extension is greater than or equal to the thickness of the N-th layer of the diaphragm from the first layer of the diaphragm.
Further, the battery cell main body further comprises a positive plate and a negative plate, the width of the first layer of the diaphragm extension part is larger than or equal to the thickness of the single-layer positive plate, or the width of the first layer of the diaphragm extension part is larger than or equal to the thickness of the single-layer negative plate.
Further, the width of the first layer of the diaphragm extension ranges from 1.5mm to 2mm.
Further, the adhesive layer comprises a first adhesive layer positioned on the first side of the battery cell, a second adhesive layer positioned on the second side of the battery cell, and a third adhesive layer positioned between the first adhesive layer and the second adhesive layer, the width of the second adhesive layer on the second side of the battery cell is L1, and the distance between the edge of one side, away from the third adhesive layer, of the diaphragm extension part and the third adhesive layer is L2, so that L1-L2 is more than or equal to 2mm.
Further, the N-th layer of the diaphragm extension portion is stacked along the width direction of the battery cell, the N-th layer of the diaphragm extension portion is located between the third adhesive layer and the battery cell main body, the N-th layer of the diaphragm extension portion is bonded with the adhesive layer, and the projection of the N-th layer of the diaphragm extension portion at least partially covers the projection of the N-1-th layer of the diaphragm extension portion along the width direction of the battery cell.
A second aspect of the present utility model provides a battery comprising a housing, an electrolyte, and the cell of the first aspect, the cell being located within the housing, the electrolyte being injected into the housing in which the cell is mounted.
Further, the N-layer separator extension and the glue layer are located between the cell main body and the case, and a range of a distance between the case and the cell main body in a width direction of the battery is greater than or equal to a sum of a thickness of the N-1 layer separator and a thickness of the glue layer.
According to the battery cell and the battery, the diaphragm extending part is folded to two sides of the width direction of the battery cell main body, the adhesive layer is arranged on the diaphragm extending part at the first side, and the diaphragm extending part is wrapped by the adhesive layer, so that the diaphragm extending part is tightly attached to the two sides of the width direction of the battery cell main body under the constraint of the adhesive layer, the limiting effect on the pole pieces (comprising the positive pole piece and the negative pole piece) in the battery cell main body can be achieved, the pole pieces are prevented from sliding relative to the diaphragm, and the dislocation of the pole pieces in the battery cell main body and the slipping of the pole pieces from the two sides of the battery cell main body can be avoided; in addition, at least one layer of diaphragm extension part covers two sides of the width direction of the battery cell main body, so that the problem of contact short circuit between the positive electrode plate and the negative electrode plate caused by tearing of a single-layer diaphragm can be avoided; meanwhile, the adhesive layer and the diaphragm extension part are positioned on two sides of the width direction of the battery cell main body, so that the falling performance of the battery cell can be improved, and the safety performance of the battery cell is improved.
Drawings
Fig. 1 is a schematic structural diagram of a battery cell before a diaphragm extension part of the battery cell is folded;
fig. 2 is a schematic structural diagram of a battery cell according to an embodiment of the present utility model.
Reference numerals illustrate:
100-cell body; 110-positive plate; 120-negative plate; 130-a membrane; 200-septum extension; 300-glue layer; 310-a first glue layer; 320-a second glue layer; 330-third glue layer.
Detailed Description
The technical scheme of the utility model is clearly and thoroughly described below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. Furthermore, in the description of the present utility model, the meaning of "at least one" means one or more, unless specifically defined otherwise.
In the description of the present specification, the term "on the basis of the above-described embodiment" means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one preferred embodiment or preferred example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same implementations or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1 to 2, the first aspect of the present embodiment provides a battery cell, including a battery cell main body 100 and a separator extension 200, wherein the battery cell main body 100 includes at least one positive electrode sheet 110, at least one negative electrode sheet 120, and at least one separator 130 located between the positive electrode sheet 110 and the negative electrode sheet 120, and the positive electrode sheet 110, the negative electrode sheet 120, and the separator 130 are alternately stacked;
the diaphragm extension 200 is formed of the diaphragm 130 protruding from the cell main body 100, that is, the diaphragm extension 200 is protruded beyond the positive electrode tab 110 and the negative electrode tab 120 in the width direction of the cell (i.e., the x-axis direction in fig. 1), and the diaphragm extension 200 is folded in the thickness direction of the cell (i.e., the y-axis direction in fig. 1) and covers both sides of the width direction of the cell main body 100;
the battery cell comprises a first side and a second side which are positioned at the outermost side, wherein the first side and the second side are oppositely arranged along the thickness direction of the battery cell, specifically, the first side can be the lowermost side of the battery cell, and correspondingly, the second side is the uppermost side of the battery cell; the first side may also be the uppermost side of the battery cell, and correspondingly, the second side is the lowermost side of the battery cell; the diaphragm extension part 200 positioned on the first side is provided with a glue layer 300, the glue layer 300 is folded onto the diaphragm extension part 200 positioned on the second side of the battery cell along the thickness direction of the battery cell, and the glue layer 300 wraps the diaphragm extension part 200.
According to the battery cell provided by the embodiment, the diaphragm extending part is folded to two sides of the width direction of the battery cell main body, the adhesive layer is arranged on the diaphragm extending part at the first side, and the diaphragm extending part is wrapped by the adhesive layer, so that the diaphragm extending part is tightly attached to the two sides of the width direction of the battery cell main body under the constraint of the adhesive layer, the limiting effect on the pole pieces (comprising the positive pole piece and the negative pole piece) in the battery cell main body can be achieved, the pole pieces are prevented from sliding relative to the diaphragm, and the dislocation of the pole pieces in the battery cell main body and the slipping of the pole pieces from the two sides of the battery cell main body can be avoided; in addition, at least one layer of diaphragm extension part covers two sides of the width direction of the battery cell main body, so that the problem of contact short circuit between the positive electrode plate and the negative electrode plate caused by tearing of a single-layer diaphragm can be avoided; meanwhile, the adhesive layer and the diaphragm extension part are positioned on two sides of the width direction of the battery cell main body, so that the falling performance of the battery cell can be improved, and the safety performance of the battery cell is improved.
In this embodiment, the two sides of the width direction of the battery cell main body 100 are provided with the diaphragm extension portions 200, and the two sides of the width direction of the battery cell main body 100 are provided with the adhesive layers 300, the adhesive layers 300 wrap the diaphragm extension portions 200 on the two sides of the battery cell main body 100, and the diaphragm extension portions 200 on the two sides of the battery cell main body 100 are tightly attached to the two sides of the battery cell main body 100, so that the pole pieces in the battery cell main body 100 can be better limited.
The same layer of the separator 130 may have the same width or different widths of the separator extensions 200 located at both sides of the cell main body 100 in the width direction, but for convenience of processing, it is preferable that the same layer of the separator 130 has the same width of the separator extensions 200 located at both sides of the cell main body 100 in the width direction.
In this embodiment, the battery core main body 100 includes N layers (N is greater than 1 and N is an integer) of diaphragms 130, the N layers of diaphragms 130 are stacked along the thickness direction of the battery core, and each layer of diaphragms 130 is provided with a diaphragm extension portion 200, the width of each layer of diaphragm extension portion 200 may be the same, and the width of each layer of diaphragm extension portion 200 may also be different. On the basis of the above embodiment, the width of each layer of the diaphragm extension 200 is different, and the width of each layer of the diaphragm extension 200 gradually decreases in the thickness direction of the battery cell, whereby it is possible to avoid serious increase in the volume of the battery cell, thereby affecting the energy density of the battery cell.
In this embodiment, the combination of FIG. 1 and FIG. 1As shown in fig. 2, the second side of the battery cell is the uppermost side of the battery cell, the first side of the battery cell is the lowermost side of the battery cell, the first layer of membrane 130 is disposed on the second side of the battery cell along the thickness direction of the battery cell, the nth layer of membrane 130 is disposed on the first side of the battery cell, the width of each layer of membrane extension 200 gradually decreases from the nth layer of membrane 130 to the first layer of membrane 130, and when N is greater than or equal to 2, the width of the nth layer of membrane extension 200 is greater than or equal to the thickness of the nth layer of membrane 130 from the first layer of membrane 130, for example: in FIG. 1, the N-th layer of diaphragm extension 200 has a width W N The thickness of the N-th membrane 130 from the first membrane 130 is H N W is then N ≥H N The method comprises the steps of carrying out a first treatment on the surface of the The N-1 layer diaphragm extension 200 has a width W N-1 The N-1 th membrane 130 has a thickness H from the first membrane 130 N-1 W is then N-1 ≥H N-1 . Therefore, after each layer of diaphragm extension 200 is folded, the two sides of the width direction of the battery core main body 100 are covered by the multi-layer diaphragm 130, the situation that the diaphragms on the two sides of the battery core main body 100 are torn can be improved, and the short circuit phenomenon caused by direct contact between the positive electrode plate and the negative electrode plate due to the tearing of the single-layer diaphragm 130 is avoided.
Based on the above embodiment, from the nth layer of membrane 130 to the first layer of membrane 130, the widths of each membrane extension 200 decrease in an equal-differential order, and the width difference of any two adjacent membrane extensions 200 is Δl, Δl= (W) N -W 1 ) /(N-1) where W N To be positioned at the width of the N-th layer diaphragm extension 200, W 1 Is the width of the first layer diaphragm extension 200. Therefore, the width of each layer of diaphragm extension 200 is sequentially reduced in an arithmetic progression, so that not only can the number of overlapped layers of diaphragms 130 on two sides of the battery cell main body 100 be ensured to be more, but also the consistency of the distance of each layer of diaphragm extension 200 can be ensured, the adjustment of parameters set by the lamination is facilitated, and the battery cell is convenient to manufacture.
In this embodiment, the width of the first-layer diaphragm extension 200 is greater than or equal to the thickness of the single-layer positive electrode sheet, or the width of the first-layer diaphragm extension 200 is greater than or equal to the thickness of the single-layer negative electrode sheet, so that it is possible to avoid that the width of the first-layer diaphragm extension 200 is too short to cover the uppermost electrode sheet of the battery cell main body 100, and the electrode sheet located at the uppermost side of the battery cell main body 100 leaks out in a dislocation manner.
On the basis of the above embodiment, the width range of the first-layer diaphragm extension 200 is 1.5mm to 2mm, so that it can be ensured that the first-layer diaphragm extension 200 covers the pole piece on the uppermost side of the cell main body 100, the pole piece on the uppermost side of the cell main body 100 is prevented from being misplaced and leaked, and waste caused by too large width of the first-layer diaphragm extension 200 can be avoided.
Referring to fig. 2, the adhesive layer 300 includes a first adhesive layer 310 located on a first side of the battery cell, a second adhesive layer 320 located on a second side of the battery cell, and a third adhesive layer 330 located between the first adhesive layer 310 and the second adhesive layer 320, and along a thickness direction of the battery cell, a projection of the second adhesive layer 320 covers the diaphragm extension 200 located on the second side of the battery cell, so as to ensure that the adhesive layer 300 wraps the diaphragm extension 200, and prevent the adhesive from being adhered poorly.
Based on the above embodiment, on the second side of the battery cell, the width of the second adhesive layer 320 is L1, and the distance between the edge of the side of the diaphragm extension 200 away from the third adhesive layer 330 and the third adhesive layer 330 is L2, L1-L2 is greater than or equal to 2mm, so that the waste of the adhesive layer 300 can be avoided, and the poor adhesive bonding can be prevented.
The thickness of the first adhesive layer 310 is not further limited in this embodiment, and those skilled in the art can set the thickness according to practical situations.
The plurality of diaphragm extensions 200 are folded along the thickness direction of the battery cell and then positioned between the third adhesive layer 330 and the battery cell main body 100, each layer of diaphragm extension 200 is tightly attached to two sides of the width direction of the battery cell main body under the constraint of the adhesive layer 300, the nth layer of diaphragm extension 200 is adhered to the third adhesive layer 330, and the projection of the nth layer of diaphragm extension 200 at least partially covers the projection of the nth-1 layer of diaphragm extension 200 along the width direction of the battery cell. Specifically, the projection of the nth layer septum extension 200 at least partially covers the projection of the nth-1 layer septum extension 200, the projection of the nth-1 layer septum extension 200 at least partially covers the projection of the nth-2 layer septum extension 200, … …, and the projection of the second layer septum extension 200 at least partially covers the projection of the first layer septum extension 200; preferably, the projection of the nth layer septum extension 200 completely covers the projection of the nth-1 layer septum extension 200, the projection of the nth-1 layer septum extension 200 completely covers the projection of the nth-2 layer septum extension 200, … …, and the projection of the second layer septum extension 200 completely covers the projection of the first layer septum extension 200. Therefore, after each layer of diaphragm extension 200 is folded, the two sides of the width direction of the battery core main body 100 are covered by the multi-layer diaphragm 130, the situation that the diaphragms on the two sides of the battery core main body 100 are torn can be improved, and the short circuit phenomenon caused by direct contact between the positive electrode plate and the negative electrode plate due to the tearing of the single-layer diaphragm 130 is avoided.
In this embodiment, the separator 130 may be stacked in a zigzag manner, or the separator 130 may be stacked layer by layer, which is not limited in this embodiment, and may be set by those skilled in the art according to practical situations.
A second aspect of the present embodiment provides a battery comprising a housing, an electrolyte, and the cell of the first aspect, the cell being located within the housing, the electrolyte being injected into the housing in which the cell is mounted.
The battery cell comprises a positive plate 110, a negative plate 120 and a diaphragm 130, wherein the positive plate 110 and the negative plate 120 are in contact with electrolyte, chemical energy in the electrolyte is converted into electric energy, and current generated on the positive plate 110 and the negative plate 120 can be conducted to the positive electrode and the negative electrode on the shell through positive electrode lugs and negative electrode lugs on the positive plate and the negative plate.
In this embodiment, the battery cell is placed in the interior of the housing, the diaphragm extension 200 is wrapped by the adhesive layer 300, so that the diaphragm extension 200 is tightly attached to two sides of the width direction of the battery cell main body 100, and the N-layer diaphragm extension 200 and the adhesive layer 300 are located between the battery cell main body 100 and the housing, so that a buffer area formed by the N-layer diaphragm extension 200 and the adhesive layer 300 is formed between the battery cell main body 100 and the housing, thereby effectively improving the dropping performance of the battery cell, avoiding the problem that the diaphragm 130 is damaged due to the impact between the battery cell and the bottom of the housing and the short circuit is caused by the contact of the positive and negative pole pieces, and improving the safety performance of the battery.
In this embodiment, the distance between the housing and the battery cell main body 100 is greater than or equal to the sum of the thickness of the N-1 layer of the membrane 130 and the thickness of the adhesive layer 300 along the width direction of the battery, so that the battery cell can be placed in the housing, and the drop performance of the battery cell can be effectively improved.
In this embodiment, the casing may be an aluminum plastic film casing, an aluminum casing or a steel casing, and a person skilled in the art may select a suitable casing according to practical situations.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.
Claims (10)
1. The battery cell is characterized by comprising a battery cell main body and a diaphragm extension part;
the diaphragm extending part is formed by a diaphragm extending from the battery cell main body, and the diaphragm extending part is folded and covers two sides of the battery cell main body in the width direction;
the battery cell comprises a first side and a second side which are positioned at the outermost side, the first side and the second side are oppositely arranged along the thickness direction of the battery cell, a glue layer is arranged on the diaphragm extension part of the first side, the glue layer is folded to the diaphragm extension part of the second side, and the glue layer wraps the diaphragm extension part.
2. The cell of claim 1, wherein the cell body comprises N layers of the separator, N is greater than 1 and N is an integer, N layers of the separator are stacked, each layer of the separator is provided with the separator extension, and the width of each layer of the separator extension gradually decreases along the thickness direction of the cell.
3. The cell of claim 2, wherein an nth layer of said membranes is disposed on said first side and a first layer of said membranes is disposed on said second side, the width of each layer of said membrane extensions decreasing in an arithmetic progression from said nth layer of said membranes to said first layer of said membranes, any ofThe width difference of the diaphragm extension parts of two adjacent layers is delta L, delta L= (W) N -W 1 ) /(N-1) where W N To be positioned at the N layer, the width of the extending part of the diaphragm is W 1 Is the width of the diaphragm extension at the first layer.
4. The cell of claim 3, wherein when N is greater than or equal to 2, the width of the N-th layer of the diaphragm extension is greater than or equal to the thickness of the N-th layer of the diaphragm from the first layer of the diaphragm.
5. The cell of claim 3, wherein the cell body further comprises a positive plate and a negative plate, the first layer of the separator extension having a width greater than or equal to the thickness of a single layer of the positive plate, or the first layer of the separator extension having a width greater than or equal to the thickness of a single layer of the negative plate.
6. The cell of claim 5, wherein the first layer of the diaphragm extension has a width in the range of 1.5mm to 2mm.
7. The cell of claim 2, wherein the glue layers comprise a first glue layer located on the first side of the cell, a second glue layer located on the second side of the cell, and a third glue layer located between the first glue layer and the second glue layer, wherein the width of the second glue layer is L1 on the second side of the cell, and wherein the distance between the edge of the side of the diaphragm extension away from the third glue layer and the third glue layer is L2, wherein L1-L2 is greater than or equal to 2mm.
8. The cell of claim 7, wherein N layers of the diaphragm extensions are stacked in a width direction of the cell, N layers of the diaphragm extensions are located between the third adhesive layer and the cell body, an nth layer of the diaphragm extensions is bonded to the adhesive layer, and a projection of the nth layer of the diaphragm extensions at least partially covers a projection of the nth-1 layer of the diaphragm extensions in the width direction of the cell.
9. A battery comprising a housing, an electrolyte, and the cell of any one of claims 1 to 8, the cell being located within the housing, the electrolyte being injected into the housing in which the cell is mounted.
10. The battery of claim 9, wherein N layers of the separator extension and the glue layer are located between the cell body and the case, and a range of spacing between the case and the cell body in a width direction of the battery is greater than or equal to a sum of a thickness of the N-1 layers of the separator and a thickness of the glue layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320086748.2U CN219267841U (en) | 2023-01-30 | 2023-01-30 | Battery cell and battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320086748.2U CN219267841U (en) | 2023-01-30 | 2023-01-30 | Battery cell and battery |
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| CN219267841U true CN219267841U (en) | 2023-06-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117239220A (en) * | 2023-11-14 | 2023-12-15 | 珠海冠宇电池股份有限公司 | Battery core |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117239220A (en) * | 2023-11-14 | 2023-12-15 | 珠海冠宇电池股份有限公司 | Battery core |
| CN117239220B (en) * | 2023-11-14 | 2024-02-23 | 珠海冠宇电池股份有限公司 | Battery core |
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