CN216354342U - Battery core pole group and laminated battery - Google Patents
Battery core pole group and laminated battery Download PDFInfo
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- CN216354342U CN216354342U CN202122388214.9U CN202122388214U CN216354342U CN 216354342 U CN216354342 U CN 216354342U CN 202122388214 U CN202122388214 U CN 202122388214U CN 216354342 U CN216354342 U CN 216354342U
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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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- 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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Abstract
The utility model provides a battery cell pole group and a laminated battery, relates to the technical field of batteries, and aims to optimize the structure of the pole group to a certain extent, improve the space utilization rate of the end part of the pole group and reduce the risk that tabs are easily broken during welding. The utility model provides a battery cell pole group, which comprises a battery cell pole group formed by stacking a first pole group and a second pole group along a first direction; the end of the first pole group is provided with a first pole lug, the end of the second pole group is provided with a second pole lug, and the projection of the first pole lug in the first direction and the projection of the second pole lug in the first direction are not overlapped.
Description
Technical Field
The utility model relates to the technical field of battery equipment, in particular to a battery core pole group and a laminated battery.
Background
At present, most of batteries are one or more pole groups, and the more the number of the pole groups is, the more the number of the negative pole pieces which are not used on one side is, so that the energy density is not improved, and the expansion space in the thickness direction is wasted, thereby the cycle performance is deteriorated. If the number of pole groups is reduced, the waste of space can be reduced. However, each layer of the laminated battery needs one tab, and if the number of the electrode groups is simply reduced, the number of the welded tabs is too large and too thick, so that the problems of tab tearing or poor welding and the like are caused.
Therefore, it is desirable to provide a cell stack and a laminated battery, which solve the problems in the prior art to some extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a battery cell pole group and a laminated battery, which aim to optimize the structure of the pole group to a certain extent, improve the space utilization rate of the end part of the pole group and reduce the risk that the welding of a lug is easy to break.
The utility model provides a battery cell pole group, which is formed by stacking a first pole group and a second pole group along a first direction; the end part of the first pole group is provided with a first pole lug, the end part of the second pole group is provided with a second pole lug, and the projection of the first pole lug in the first direction and the projection of the second pole lug in the first direction are not overlapped.
Wherein the first tab and the second tab have the same horizontal height in the first direction.
Specifically, the polarities of the first tab and the second tab at the same corresponding ends of the first pole group and the second pole group are the same.
The first pole group comprises a plurality of first pole pieces, first pole lug parts are arranged at the end parts of the first pole pieces, and the first pole pieces are stacked along the first direction, so that the first pole lug parts are stacked to form the first pole lug; the second pole group includes a plurality of second pole pieces, and is a plurality of the tip of second pole piece all is equipped with second pole ear portion, and is a plurality of the second pole piece is followed first direction piles up the setting, so that it is a plurality of second pole ear portion piles up and forms the second utmost point ear.
Specifically, the sum of the number of the first pole piece and the second pole piece is not more than 140 layers, and the number of the first pole piece is consistent with the number of the second pole piece.
Furthermore, a plurality of first pole lug parts, which are positioned between a first side of the battery cell pole group in the first direction and the middle position of the battery cell pole group, are all closed to the middle position;
and the second pole ear parts are all closed to the middle position from the second side of the battery cell pole group in the first direction to the middle position of the battery cell pole group.
Further, a plurality of the first tab portions are welded to form the first tab; a plurality of the second pole ear portions are formed by welding the second pole ear portions.
The size of the first pole pieces is gradually reduced from the first side to the middle position, and a first bending part and a first welding part are formed after welding; the size of the second pole pieces is gradually reduced from the second side to the middle position, and a second bending part and a second welding part are formed after welding.
Specifically, the first welding portion of the first tab and the second welding portion of the second tab are both formed in the middle of the cell pole group in the first direction.
Compared with the prior art, the battery core pole group provided by the utility model has the following advantages:
the battery cell pole group provided by the utility model is formed by stacking a first pole group and a second pole group along a first direction; the end of the first pole group is provided with a first pole lug, the end of the second pole group is provided with a second pole lug, and the projection of the first pole lug in the first direction and the projection of the second pole lug in the first direction are not overlapped.
Therefore, the analysis shows that the battery core pole group is formed by stacking the first pole group and the second pole group in the first direction, so that the thickness of the first pole lug formed by the first pole group can be avoided to a certain extent by the two pole groups under the premise of ensuring the total thickness, and the thickness of the second pole lug formed by the second pole group is too thick, so that the problem that the first pole lug and the second pole lug are broken or welded difficultly in the welding process is avoided to a certain extent.
Moreover, due to the fact that the projections of the first lug and the second lug in the first direction are not overlapped, and the first lug and the second lug are located at the end portion of the battery cell pole group, on one hand, the first lug and the second lug can not affect each other during welding, and on the other hand, the end portion space of the battery cell pole group can be utilized to the maximum extent.
In addition, the utility model also provides a laminated battery applying the battery core pole group.
Adopt the laminated battery of electric core utmost point group that this application provided, the tip space of can make full use of utmost point group on the one hand, on the other hand, can avoid the too big utmost point ear fracture or the not firm problem of welding to appear utmost point ear among the welding process that leads to of utmost point ear thickness in the single utmost point group betterly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of an overall structure of a battery cell pole group according to an embodiment of the present invention.
In the figure: 1-a first pole group; 101-a first pole piece; 102-a first tab; 1021-a first bend; 1022 — a first weld; 103-a first side; 2-a second pole group; 201-a second pole piece; 202-a second tab; 2021-second bend; 2022-second weld; 203-a second side;
s1 — first direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.
As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.
For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.
Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.
The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
As shown in fig. 1, the present invention provides a cell pole group, which is formed by stacking a first pole group 1 and a second pole group 2 along a first direction S1; the first tab 102 is formed at the end of the first pole group 1, the second tab 202 is formed at the end of the second pole group 2, and the projection of the first tab 102 in the first direction S1 and the projection of the second tab 202 in the first direction S1 do not overlap each other.
Compared with the prior art, the battery core pole group provided by the utility model has the following advantages:
according to the cell pole group provided by the utility model, the cell pole group is formed by stacking the first pole group 1 and the second pole group 2 in the first direction S1, so that the problem that the first tab 102 formed by the first pole group 1 is too thick and the second tab 202 formed by the second pole group 2 is too thick can be avoided to a certain extent on the premise of ensuring the total thickness through the two contained pole groups, and the problem that the tabs are broken or the welding is not firm when the first tab 102 and the second tab 202 are welded is avoided to a certain extent.
In addition, in the present invention, since the projections of the first tab 102 and the second tab 202 in the first direction S1 do not overlap with each other, the first tab 102 and the second tab 202 can be prevented from affecting each other during welding.
It should be added that, as shown in fig. 1, the cell pole group in the present application has a rectangular structure, and accordingly, the first pole group 1 and the second pole group 2 in the present application each have a rectangular structure, that is, an end face of one end of the first pole group 1 and an end face of one end of the second pole group 2 jointly constitute an end face of one end of the cell pole group.
Preferably, as shown in fig. 1, the first tab 102 and the second tab 202 in the present application have the same horizontal height in the first direction S1, and both the first tab 102 and the second tab 202 are formed at the middle position of the cell pole group in the first direction S1.
Because the first tab 102 and the second tab 202 need to be bent after the tab connection pieces are welded and are attached to the corresponding end surfaces of the battery cell electrode group, the horizontal heights of the first tab 102 and the second tab 202 in the first direction S1 are consistent, and the contact areas between the first tab 102 and the tab connection pieces and between the second tab 202 and the tab connection pieces can be kept consistent.
And the first tab 102 and the second tab 202 are located in the middle of the battery cell pole group in the first direction S1, so that after the first tab 102 and the second tab 202 are bent, the end portions of the first tab and the second tab can be consistent with the edge of the battery cell pole group, thereby forming a flat rectangular structure, and the tabs can be conveniently installed in the shell of the laminated battery.
During operation, the tab connecting sheet is firstly attached to the first tab 102 and the second tab 202, and then the first tab 102 and the second tab 202 are both connected with the tab connecting sheet through ultrasonic welding. Finally, the first tab 102 and the second tab 202 welded with the tab connecting pieces are bent together, and the first tab 102 and the second tab 202 can be attached to the end surface of the battery core electrode group.
It should be added here that the polarities of the first tab 102 and the second tab 202 at the same end of the first pole group 1 and the second pole group 2 are the same in this application. That is, in the present application, the first tab 102 is formed at each of the two ends of the first electrode group 1, the polarities of the first tabs 102 at the two ends are different, the second tab 202 is formed at each of the two ends of the second electrode group 2, and the polarities of the second tabs 202 at the two ends are different.
As shown in fig. 1, in the present application, the first pole group 1 includes a plurality of first pole pieces 101, end portions of the plurality of first pole pieces 101 are respectively provided with a first pole tab portion, and the plurality of first pole pieces 101 are stacked along a first direction S1, so that the plurality of first pole tab portions are stacked to form a first pole tab 102; the second pole group 2 includes a plurality of second pole pieces 201, the ends of the plurality of second pole pieces 201 are respectively provided with a second pole ear portion, and the plurality of second pole pieces 201 are stacked along the first direction S1, so that the plurality of second pole ear portions are stacked to form the second pole ear 202.
First pole ear portion is all formed at the both ends of first pole piece 101 in this application, can form first utmost point group 1 through a plurality of first pole pieces 101 that stack the setting along first direction S1 to the both ends that can make the first utmost point group 1 that forms have the first utmost point ear 102 of polarity difference respectively. Second pole ear portions are formed at both ends of the second pole piece 201, and the second pole group 2 can be formed by stacking a plurality of second pole pieces 201 along the first direction S1, so that both ends of the formed second pole group 2 can respectively have second pole ears 202 with different polarities.
Preferably, the sum of the number of the first pole piece 101 and the second pole piece 201 is not more than 140 layers, and the number of the first pole piece 101 is consistent with the number of the second pole piece 201.
When the sum of the number of the first pole piece 101 and the second pole piece 201 is 140 layers, the number of the first pole piece 101 is 70 layers, and the number of the second pole piece 201 is 70 layers. Correspondingly, the quantity of first utmost point ear is 70, and the quantity of second utmost point ear is 70, has equallyd divide the thickness of utmost point ear to on the basis of guaranteeing electric core utmost point group number of piles, can avoid first utmost point ear 102 and second utmost point ear 202 thickness too big to a certain extent, make utmost point ear or the problem that weld strength is not enough appear in the welding process with utmost point ear connection piece.
Further, as shown in fig. 1, the first tab portion of the cell electrode group on the first side 103 in the first direction S1 is close to the first tab portion in the middle position in the first direction S1; the second pole ear portions of the cell pole group on the second side 203 in the first direction S1 are close to the second pole ear portions in the middle position in the first direction S1.
The first side 103 in this application is the side of the lower surface of the cell pole group as shown in fig. 1, and the second side 203 is the side of the upper surface of the cell pole group. Accordingly, the second pole group 2 is located above the first pole group 1, and the first pole group 1 is formed first, and then the second pole group 2 is formed. That is, the plurality of first pole pieces 101 of the first pole group 1 are stacked in sequence from the first side 103 to the second side 203 along the first direction S1. When the stack is half of the total number of layers, the first pole group 1 is formed, and then the stack is continued toward the second side 203 to form the second pole group 2.
Preferably, as shown in fig. 1, since the first tab 102 and the second tab 202 are both formed at the middle position of the cell electrode group, in order to ensure that the first tab portion of the first side 103 and the second tab portion of the second side 203 can be closed together with the first tab portion and the second tab portion of the middle position, the size of the first tab portion of the first side 103 and the size of the second tab portion of the second side 203 in this application are both larger than the size of the first tab portion and the second tab portion of the middle position, so that the size of the tab portions is gradually reduced from two sides to the middle position, and then after the first tab 102 is formed, the first bending portion 1021 and the first welding portion 1022 can be formed, and after the second tab 202 is formed, the second bending portion 2021 and the second welding portion 2022 can be formed.
It should be added here that, in the present application, a plurality of first tab portions are formed by welding to form the first tab 102; the plurality of second pole ear portions are formed into second pole ear 202 by welding.
In addition, the utility model also provides a laminated battery applying the battery core pole group.
Adopt the laminated battery of electric core utmost point group that this application provided, the tip space of can make full use of utmost point group on the one hand, on the other hand, can avoid the too big utmost point ear fracture or the not firm problem of welding to appear utmost point ear among the welding process that leads to of utmost point ear thickness in the single utmost point group betterly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A battery cell pole group is characterized in that the battery cell pole group is formed by stacking a first pole group and a second pole group along a first direction;
the end part of the first pole group is provided with a first pole lug, the end part of the second pole group is provided with a second pole lug, and the projection of the first pole lug in the first direction and the projection of the second pole lug in the first direction are not overlapped.
2. The cell pole group of claim 1, wherein the first tab is level with the second tab in the first direction.
3. The cell pole group of claim 1, wherein the first and second tabs at the same corresponding ends of the first and second pole groups have the same polarity.
4. The cell pole group according to claim 1, wherein the first pole group comprises a plurality of first pole pieces, ends of the first pole pieces are provided with first pole ear portions, and the first pole pieces are stacked along the first direction, so that the first pole ear portions are stacked to form the first pole ear;
the second pole group includes a plurality of second pole pieces, and is a plurality of the tip of second pole piece all is equipped with second pole ear portion, and is a plurality of the second pole piece is followed first direction piles up the setting, so that it is a plurality of second pole ear portion piles up and forms the second utmost point ear.
5. The cell pole group of claim 4, wherein the sum of the number of the first pole pieces and the number of the second pole pieces is no greater than 140 layers, and the number of the first pole pieces is consistent with the number of the second pole pieces.
6. The cell pole group according to claim 5, wherein a plurality of first pole ear portions from a first side of the cell pole group in the first direction to a middle position of the cell pole group are all closed to the middle position;
and the second pole ear parts are all closed to the middle position from the second side of the battery cell pole group in the first direction to the middle position of the battery cell pole group.
7. The cell pole group of claim 6, wherein a plurality of the first pole tabs are formed by welding the first pole tabs;
a plurality of the second pole ear portions are formed by welding the second pole ear portions.
8. The cell pole group according to claim 7, wherein the size of the first pole pieces gradually decreases from the first side to the middle position, and a first bending portion and a first welding portion are formed after welding;
the size of the second pole pieces is gradually reduced from the second side to the middle position, and a second bending part and a second welding part are formed after welding.
9. The cell pole group of claim 8, wherein the first weld of the first tab and the second weld of the second tab are both formed at an intermediate position of the cell pole group in a first direction.
10. A laminated battery comprising the cell pole group of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122388214.9U CN216354342U (en) | 2021-09-29 | 2021-09-29 | Battery core pole group and laminated battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122388214.9U CN216354342U (en) | 2021-09-29 | 2021-09-29 | Battery core pole group and laminated battery |
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| Publication Number | Publication Date |
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| CN216354342U true CN216354342U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122388214.9U Active CN216354342U (en) | 2021-09-29 | 2021-09-29 | Battery core pole group and laminated battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395186A (en) * | 2022-07-01 | 2022-11-25 | 岳阳耀宁新能源科技有限公司 | Square lithium ion battery with staggered lugs and lug welding device |
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2021
- 2021-09-29 CN CN202122388214.9U patent/CN216354342U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395186A (en) * | 2022-07-01 | 2022-11-25 | 岳阳耀宁新能源科技有限公司 | Square lithium ion battery with staggered lugs and lug welding device |
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