CN216460971U - Bending device of connection structure of tab and connecting sheet of battery electrode group - Google Patents
Bending device of connection structure of tab and connecting sheet of battery electrode group Download PDFInfo
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- CN216460971U CN216460971U CN202122130097.6U CN202122130097U CN216460971U CN 216460971 U CN216460971 U CN 216460971U CN 202122130097 U CN202122130097 U CN 202122130097U CN 216460971 U CN216460971 U CN 216460971U
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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 discloses a bending device of a connection structure of a pole lug and a connecting sheet of a battery pole group, which comprises a bottom plate, a plurality of bending plates and a plurality of bending plates, wherein the bottom plate is horizontally distributed; a battery cover attaching plate is vertically arranged at the right end of the top of the bottom plate; the right end of the top of the bottom plate is provided with a concave milling groove which is longitudinally distributed at the right left edge of the battery cover close to the backup plate; the front end and the rear end of the milling groove are respectively and vertically inserted into the lower end of a connecting sheet height limiting sheet; the two connecting sheet height limiting sheets and the battery cover attaching plate form longitudinally distributed clamping grooves; and the clamping groove is used for inserting a battery cover on the battery pole group. The bending device of the connection structure of the tab and the connecting sheet of the battery pole group, disclosed by the utility model, has a scientific structural design, can effectively avoid the problem that the tab is crushed, broken or pressed when the bending device is used for bending a plurality of layers of tabs (the positive tab and the negative tab) welded together with the connecting sheet, and has a protection effect on the inner pole piece connected with the tab, so that the bending efficiency is greatly improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a bending device of a connection structure of a lug and a connecting sheet of a battery pole group.
Background
At present, lithium ion batteries are widely applied to portable electronic devices such as mobile phones and computers, and also widely applied to large and medium-sized electric devices such as electric vehicles and energy storage devices due to the advantages of high specific energy, high voltage platform, long cycle life, environmental protection and the like. Especially, as the technology of electric vehicles is gradually mature and improved, the requirements of users on various aspects such as endurance, service life and the like are continuously improved, and especially the problems of safety and endurance mileage become the focus of important attention.
In order to improve the safety and the endurance mileage of the electric automobile, in the production design of the square aluminum shell lithium ion battery, a tab cutting structure is adopted more and more, and copper-aluminum foils (namely, pole piece foils and also foils of the tabs) are selected to be thinner and thinner.
However, the conventional bending mode of the tabs is mostly a mode of directly pressing the tabs, and because connecting sheets welded to the tabs are different in polarity and hardness and thinner, the bending positions of the connecting sheets are different, the tabs are easy to crush or break, and meanwhile, the pole pieces connected with the inner sides of the tabs are easy to damage and destroy, so that the overall performance of the battery is influenced;
in addition, adopt the mode that the antipodal ear directly pressed, because the position of bending differs, the degree is different for utmost point ear piles up, during the battery use, has the potential safety hazard, and utmost point ear can contact with the casing even, thereby leads to the condemned problem of short circuit.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a bending device of a connection structure of a lug and a connecting sheet of a battery pole group, aiming at the technical defects in the prior art.
Therefore, the utility model provides a bending device of a connection structure of a lug and a connecting sheet of a battery pole group, which comprises a bottom plate which is horizontally distributed;
a battery cover attaching plate is vertically arranged at the right end of the top of the bottom plate;
the right end of the top of the bottom plate is provided with a concave milling groove which is longitudinally distributed at the right left edge of the battery cover attaching plate;
the front end and the rear end of the milling groove are respectively and vertically inserted into the lower end of a connecting sheet height limiting sheet;
the two connecting sheet height limiting sheets and the battery cover attaching plate are provided with clamping grooves which are longitudinally distributed;
the clamping groove is used for inserting a battery cover on the battery pole group;
the battery pole group is horizontally arranged at the top of the bottom plate and is positioned right left of the two connecting sheet height limiting sheets;
the front end and the rear end of the right side of the battery pole group are respectively connected with a multi-layer pole lug;
the other end of each multi-layer tab is welded with one end of a connecting sheet;
the other end of each connecting sheet is connected with the left side of the battery cover;
the battery cover is attached to the front end and the rear end of the lower part of the right side of the backup plate, and a fixing block is respectively arranged on the front end and the rear end of the lower part of the right side of the battery cover;
the fixed block is provided with a vertically through screw hole;
and each fixed block is fixedly connected with a reserved threaded hole on the bottom plate through a fastening bolt penetrating through the threaded hole.
Preferably, the transverse thickness of the battery cover is consistent with the transverse width of the clamping groove;
the longitudinal length of the clamping groove is greater than that of the battery cover.
Preferably, the battery cover clings to the plate and is parallel to the connecting piece height limiting piece.
Preferably, the longitudinal length of the battery cover close to the plate is greater than that of the battery cover;
the vertical height of the battery cover attached to the leaning plate is greater than one half of the vertical height H of the battery cover.
Preferably, the height h of each connecting sheet in the vertical direction, which is upwards exposed out of the milling groove, is equal to the vertical distance between the position B before the bending of the connecting structure of the lug and the connecting sheet and the bottom surface C of the battery cover;
the position B before the bending of the connection structure of the lug and the connecting sheet is the specific connection position of the right end part of the connecting sheet and the upper left side wall of the battery cover.
Compared with the prior art, the bending device for the connection structure of the tab and the connecting sheet of the battery pole group has the advantages that the structural design is scientific, the problem that the tab is crushed, pulled off or pressed off can be effectively solved when the bending device is used for bending the multi-layer tabs (the positive tab and the negative tab) welded together with the connecting sheet, the protection effect is achieved on the inner side pole piece connected with the tab, the bending efficiency is greatly improved, and the bending device has great production practice significance.
In addition, according to the utility model, when the multi-layer tabs (the positive tab and the negative tab) welded together with the connecting sheet are bent, the consistency of the bending positions of the connecting sheet can be ensured, so that the safe use of the lithium ion battery is ensured, the service life of the battery is prolonged, the market competitiveness of the product is improved, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a bending device of a connection structure of a tab and a connecting sheet of a battery electrode group, provided by the utility model;
fig. 2 is a top view of a bending device of a tab and connecting sheet connecting structure of a battery electrode group provided by the utility model;
fig. 3a is a schematic structural view of a bending device of a connection structure of a tab and a connecting sheet of a battery pole group, when the battery pole group is placed, according to the present invention;
fig. 3b is a schematic diagram of a bending device of a connection structure of a tab and a connecting sheet of a battery pole group, according to the utility model, the positional dimensional relationship of the relevant structure is shown when the battery pole group is placed;
fig. 4 is a schematic structural view of a bending device of a tab and connecting sheet connection structure of a battery electrode group at the beginning of a bending operation according to the present invention;
fig. 5 is a schematic structural view of a bending device of a connection structure of a tab and a connecting sheet of a battery electrode group, when bending is completed, according to the utility model;
in the figure: 1, a battery cover clings to a backup plate; 2 is a bottom plate; 3 is a connecting sheet height limiting sheet; 4 is a battery pole group; 5 is a battery cover;
6 is a connecting sheet; 7 is a multilayer tab; 8 is a clamping groove; 9, milling grooves; 10 is a screw hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 5, the present invention provides a bending apparatus for a tab and tab connection structure of a battery electrode assembly, including a base plate 2 horizontally distributed;
a battery cover attaching plate 1 is vertically arranged at the right end of the top of the bottom plate 2;
the right end of the top of the bottom plate 2 is provided with a concave milling groove 9 which is longitudinally distributed at the right left edge of the battery cover attaching plate 1;
the front end and the rear end of the milling groove 9 are respectively and vertically inserted into the lower end of one connecting sheet height limiting sheet 3 (namely, the positive electrode and the negative electrode respectively correspond to one connecting sheet height limiting sheet 3);
a clamping groove 8 which is longitudinally distributed is formed between the two connecting sheet height limiting sheets 3 and the battery cover attaching plate 1;
a slot 8 for inserting the battery cover 5 on the battery pole group 4 (i.e. the original battery cover 5 of the battery pole group 4);
the battery pole group 4 is horizontally arranged at the top of the bottom plate 2 and is positioned right left of the two connecting sheet height limiting sheets 3;
the front end and the rear end of the right side of the battery pole group 4 are respectively connected with a multilayer pole lug 7;
the other end of each multilayer tab 7 is respectively welded with one end of a connecting sheet 6;
the other end of each connecting piece 6 is connected (e.g., welded) to the left side of the cell cover 5 (i.e., the inner side facing the cell stack body).
The multilayer tabs 7 include a positive electrode multilayer tab and a negative electrode multilayer tab; the battery comprises a positive electrode multilayer lug and a negative electrode multilayer lug, wherein one ends of the positive electrode multilayer lug and the negative electrode multilayer lug are respectively connected with a positive plate and a negative plate which are positioned on the front end and the rear end of the right side of a battery pole group 4, and the other ends of the positive electrode multilayer lug and the negative electrode multilayer lug are respectively connected with a connecting plate 6.
In the utility model, in concrete implementation, the battery cover is attached to the plate 1 and is positioned right to the two connecting piece height limiting pieces 3.
In the present invention, in particular, the transverse thickness of the battery cover 5 is consistent with the transverse width of the clamping groove 8;
the longitudinal length of the clamping groove 8 is larger than that of the battery cover 5.
Therefore, according to the present invention, the battery cover 5 provided on the battery pole group 4 can be fixed in the engaging groove 8 by the engaging groove 8 between the two connecting piece height restricting pieces 3 and the battery cover abutting plate 1.
In the utility model, the longitudinal length of the battery cover clinging to the plate 1 is greater than that of the battery cover 5;
referring to fig. 3b, the vertical height of the battery cover against the plate 1 is greater than one-half of the vertical height H of the battery cover 5.
In the utility model, in the concrete implementation, the battery cover is attached to the front end and the rear end of the lower part of the right side of the backup plate 1, and a fixing block 101 is respectively arranged;
a vertically through screw hole 10 is arranged on the fixed block 101;
each fixing block 101 is fixedly connected with a threaded hole reserved on the bottom plate 2 through a fastening bolt penetrating through the threaded hole 10.
It should be noted that, with the present invention, the battery cover attachment plate 1 is fixed in position by a fastening bolt passing through the screw hole 10; the two connecting piece height-limiting pieces 3 are fixed in position by being inserted into the milled grooves 9 on the base plate 2.
In the utility model, the battery cover clings to the plate 1 and the connecting piece height limiting piece 3 which are arranged in parallel.
In the present invention, in terms of specific implementation, referring to fig. 3B, the external leakage height h (i.e. the height h in the vertical direction upwards exposed to the milling groove 9) of each connecting plate height limiting piece 3 is equal to the vertical distance between the position B before bending of the tab and connecting plate connecting structure and the bottom surface C of the battery cover 5;
the connecting sheet height limiting sheet 3 can be adjusted to the position corresponding to the connecting sheet 6 by moving back and forth at the position of the milling groove 9;
note that, the position B before bending of the tab-to-tab connection structure shown in fig. 3B, that is, the specific connection position (i.e., connection point) of the right end portion of the connection tab 6 to the upper left side wall of the battery cover 5.
In order to more clearly understand the technical solution of the present invention, the bending operation process of the present invention is explained below.
Referring to fig. 3a, 3b, 4 and 5, firstly, when the multi-layer tab 7 of the battery electrode group 4 is bent, the protruding direction of the multi-layer tab 7 is upward, the connecting sheet 6 is aligned with the connecting sheet height limiting sheet 3, and the battery cover is inserted into the clamping groove 8 between the battery cover attaching plate 1 and the connecting sheet height limiting sheet 3 to fix the battery cover 5;
then, the battery pole group 4 is horizontally placed, so that the multilayer tabs 7 (including the positive tab and the negative tab) on the front side and the rear side of the battery pole group 4 are in a loose state;
then, the worker presses the welding points of the two connecting sheets 6 distributed in the front and back direction (i.e., the welding positions of the connecting sheets 6 and the multilayer tab 7, such as the welding points pointed by the arrow a shown in fig. 4 and 5) with both hands, and pushes the two connecting sheets 6 forward (i.e., pushes the connecting sheet height limiting sheets 3), so that the two connecting sheets 6 are bent counterclockwise along the corresponding connecting sheet height limiting sheets 3, and finally, the multilayer tab 7 (including the positive tab and the negative tab) with relatively uniform bending is obtained.
In the bending process, the bending force can be mainly concentrated in the area between the two connecting sheets 6 and the cover plate (namely the battery cover 5), so that large pulling force or pressure can not be applied to the lugs (namely the multi-layer lugs 7), and the lugs are effectively prevented from being crushed, broken or crushed.
It should be noted that the specific bending operation position applied to the tab and connection piece connecting structure by both hands of the worker is a pressing position or a pushing position during the bending operation, that is, a welding position of the connection piece 6 and the multilayer tab 7, as indicated by a welding point indicated by an arrow a shown in fig. 4 and 5.
It should be noted that, the conventional bending mode is to press the tab directly, and because the hardness of the connecting sheet is greater than the hardness of the tab, when the tab is bent in the conventional mode, the tab is easily crushed, broken or crushed, the pole piece connected to the inner side of the tab is damaged and destroyed, the performance of the battery is affected, and during the use of the battery, there is a potential safety hazard, even the tab contacts with the housing, and the battery is scrapped due to short circuit.
By adopting the bending device provided by the utility model, the bending strength can be mainly concentrated in the area between the two connecting sheets 6 and the cover plate (namely the battery cover 5), and larger pulling force or pressure can not be applied to the lugs (namely the multilayer lugs 7), so that the lugs are effectively prevented from being crushed, pulled or pressed, the inner side pole pieces connected with the lugs are protected, meanwhile, the assembly process is simplified, the production efficiency and the product qualification rate of the battery are improved, and the market competitiveness of the product is improved.
Based on the technical scheme, according to the utility model, the consistency of the bending positions of the connecting sheets can be ensured by manually pushing and pressing the welding positions of the connecting sheets (namely the welding positions of the connecting sheets 6 and the multilayer tabs 7, such as the welding points pointed by the arrows A shown in figures 4 and 5), meanwhile, the bending strength can be mainly concentrated between the connecting sheets 6 and the battery cover 5, large pulling force or pressure can not be applied to the tabs, the multilayer tabs welded together with the connecting sheets are prevented from being crushed, pulled off or pressed off, and the inner side pole pieces connected with the tabs are protected;
the utility model simplifies the assembly process, has strong assembly line operability, can operate batteries with different sizes and lug welding connection sheet structures by changing the height and the position of the connection sheets and the distance between the clamping grooves, can greatly improve the bending efficiency of the connection sheets, is beneficial to improving the safety and the production efficiency of the batteries and improves the market competitiveness of products.
Compared with the prior art, the bending device for the connection structure of the tab and the connecting sheet of the battery pole group, which is provided by the utility model, has a scientific structural design, can effectively avoid the problem that the tab is crushed, pulled off or pressed off when the bending device is used for bending the multilayer tabs (the positive tab and the negative tab) welded together with the connecting sheet, and has a protection effect on the inner pole piece connected with the tab, so that the bending efficiency is greatly improved, and the bending device has great production practice significance.
In addition, according to the utility model, when the multi-layer tab (the positive tab or the negative tab) welded together with the connecting sheet is bent, the consistency of the bending position of the connecting sheet can be ensured, so that the safe use of the lithium ion battery is ensured, the service life of the battery is prolonged, the market competitiveness of the product is improved, and the production efficiency is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A bending device of a connection structure of a pole lug and a connecting sheet of a battery pole group is characterized by comprising a bottom plate (2) which is horizontally distributed;
a battery cover attaching plate (1) is vertically arranged at the right end of the top of the bottom plate (2);
the right end of the top of the bottom plate (2) is provided with a concave milling groove (9) which is longitudinally distributed at the right left edge of the battery cover attaching plate (1);
the front end and the rear end of the milling groove (9) are respectively and vertically inserted into the lower end of a connecting sheet height limiting sheet (3);
a clamping groove (8) which is longitudinally distributed is formed between the two connecting sheet height limiting sheets (3) and the battery cover attaching plate (1);
the clamping groove (8) is used for inserting the battery cover (5) on the battery pole group (4);
the battery pole group (4) is horizontally arranged at the top of the bottom plate (2) and is positioned right left of the two connecting sheet height limiting sheets (3);
the front end and the rear end of the right side of the battery pole group (4) are respectively connected with a multi-layer pole lug (7);
the other end of each multi-layer tab (7) is respectively welded with one end of a connecting sheet (6);
the other end of each connecting sheet (6) is connected with the left side of the battery cover (5);
the battery cover is attached to the front end and the rear end of the lower part of the right side of the backup plate (1), and a fixing block (101) is respectively arranged on the front end and the rear end of the lower part of the right side of the backup plate;
a vertically through screw hole (10) is arranged on the fixed block (101);
each fixing block (101) is fixedly connected with a reserved threaded hole in the bottom plate (2) through a fastening bolt penetrating through the threaded hole (10).
2. The bending device for a tab and connecting piece connecting structure of a battery pole group according to claim 1, wherein the transverse thickness of the battery cover (5) is consistent with the transverse width of the slot (8);
the longitudinal length of the clamping groove (8) is greater than that of the battery cover (5).
3. The bending device of the connection structure of the tab and the connecting plate of the battery pole group according to claim 1, wherein the battery cover abuts against the plate (1) and the connecting plate height limiting piece (3) and is arranged in parallel with each other.
4. The bending device of the connection structure of the pole lug and the connecting plate of the battery pole group according to claim 1, wherein the longitudinal length of the battery cover abutting against the plate (1) is greater than that of the battery cover (5);
the vertical height of the battery cover attaching plate (1) is greater than one half of the vertical height H of the battery cover (5).
5. The bending device for a tab and connecting plate connecting structure of a battery pole group according to any one of claims 1 to 4, wherein each connecting plate height limiting piece (3) is exposed upward to the vertical direction height h of the milling groove (9) and is equal to the vertical distance between the position B before bending of the tab and connecting plate connecting structure and the bottom surface C of the battery cover (5);
the position B before the bending of the connection structure of the pole lug and the connecting sheet is the specific connection position of the right end part of the connecting sheet (6) and the upper left side wall of the battery cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122130097.6U CN216460971U (en) | 2021-09-06 | 2021-09-06 | Bending device of connection structure of tab and connecting sheet of battery electrode group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122130097.6U CN216460971U (en) | 2021-09-06 | 2021-09-06 | Bending device of connection structure of tab and connecting sheet of battery electrode group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216460971U true CN216460971U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122130097.6U Active CN216460971U (en) | 2021-09-06 | 2021-09-06 | Bending device of connection structure of tab and connecting sheet of battery electrode group |
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| Country | Link |
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| CN (1) | CN216460971U (en) |
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- 2021-09-06 CN CN202122130097.6U patent/CN216460971U/en active Active
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