CN210052815U - Secondary lithium battery with multiple winding cores - Google Patents
Secondary lithium battery with multiple winding cores Download PDFInfo
- Publication number
- CN210052815U CN210052815U CN201920821723.6U CN201920821723U CN210052815U CN 210052815 U CN210052815 U CN 210052815U CN 201920821723 U CN201920821723 U CN 201920821723U CN 210052815 U CN210052815 U CN 210052815U
- Authority
- CN
- China
- Prior art keywords
- lug
- welding
- welding area
- cover plate
- tab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a multi-core secondary lithium battery, which comprises a cover plate, a plurality of winding cores, a connecting plate and a protective sheet, wherein the cover plate is provided with a pole, the winding cores are provided with pole lugs, the connecting plate comprises a cover plate welding area and a pole lug welding area which are connected together, the cover plate welding area and the pole lug welding area are in a step shape, and the pole lug welding area is provided with a gap to symmetrically divide the pole lug welding area into a pole lug welding area A and a pole lug welding area B; the size of the protection sheet is consistent with that of the tab welding area A; the winding cores are symmetrically arranged on two sides of the connecting sheet, the lugs of the winding cores are symmetrically arranged in a lug welding area A and a lug welding area B, the protective sheet is arranged above the lugs, and the connecting sheet, the lugs and the protective sheet are electrically connected through welding; the cover plate welding area is arranged at a position corresponding to the pole, and the connecting sheet is electrically connected with the cover plate through welding. The utility model provides the high welding strength of apron and utmost point ear has reduced manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of the battery, concretely relates to secondary lithium cell of many rolls of cores.
Background
At present, secondary lithium battery mostly adopts a multi-roll core structure, one end of the adapter plate is welded with the pole lug when the multi-roll core structure is assembled, the other end of the adapter plate is welded with the pole lug, and the adapter plate is welded with the pole lug and then is bent inwards for 180 degrees, and meanwhile, the adapter plate is also bent for 180 degrees to enable the adapter plate and the pole lug to form mutual clamping, so that the requirements on the bending performance of the adapter plate and the pole lug are very high. Because fatigue cracks and even breakage easily occur at the bending part of the adapter plate, the service life of the adapter plate is influenced. In addition, the tab is bent twice, and the portion of the tab far away from the adapter sheet is easily pulled in the bending process, possibly causing the tab to break at the portion. In addition, because the switching piece is bent for 180 degrees and the electrode lug is bent twice, the operation procedures are increased, the production cost is increased, and the production efficiency is reduced.
Patent CN201620033989 discloses a secondary battery, which comprises a top cover and at least one bare cell. Wherein the secondary battery further comprises: and (6) an adapter plate. The adaptor piece is parallel with the top cap and is located the thickness direction's of top cap inboard, and the longitudinal direction of adaptor piece is on a parallel with the length direction of top cap, and the width direction of the horizontal parallel with top cap of adaptor piece has: the lug welding part is used for welding a corresponding lug of the naked battery cell; and the pole welding part is connected to the pole lug welding part along the longitudinal direction of the switching piece and is used for welding with the corresponding pole of the top cover so as to electrically connect the corresponding pole with the corresponding pole lug of the naked electric core. The adapter sheet is not required to be bent in the electric connection process, so that the requirement for the bending performance of the adapter sheet is completely eliminated, and the risk that the adapter sheet is broken due to the fact that the adapter sheet is bent and fatigued to generate chips and the adapter sheet is bent and fatigued is eliminated. However, the secondary battery still has disadvantages: 1. the connecting sheet of the battery is flat, and the welding strength among the lug, the cover plate and the connecting sheet is low, so that the service life of the battery is shortened, and the cost is higher; 2. the tab of the battery is clamped between two tab welding parts with the same shape and size, the two tab welding parts and the tab welding part are integrated, the processing difficulty is high, the welding strength is low, and the cost is high. Therefore, a battery with high welding strength, convenience in welding and low cost is provided to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a secondary lithium cell of core is rolled up to the welding strength between the utmost point ear, apron and the switching piece that propose current battery in solving above-mentioned background art is low, causes battery life to reduce and the higher problem of cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a secondary lithium battery of many rolls of cores, includes apron, at least one A roll core and at least one B roll core, the apron is provided with utmost point post, utmost point post includes anodal post and negative pole post, every A roll core is provided with utmost point ear, every B roll core is provided with utmost point ear, utmost point ear includes anodal ear and negative pole ear, its characterized in that still includes connection piece and screening glass, the connection piece includes apron weld zone and utmost point ear weld zone that link together, apron weld zone and utmost point ear weld zone are the step type, utmost point ear weld zone is provided with the breach and is divided into utmost point ear welding A district and utmost point ear welding B district with utmost point ear weld zone symmetry; the size of the protection sheet is consistent with that of the tab welding area A; the connecting sheet corresponds to the two protection sheets; the winding core A and the winding core B are symmetrically arranged on two sides of the connecting sheet, the lug of the winding core A is arranged in a lug welding area A, the lug of the winding core B is arranged in a lug welding area B, the protecting sheet is arranged above the lug and at a position corresponding to the lug welding area A or the lug welding area B, and the connecting sheet, the lug and the protecting sheet are electrically connected through welding; the cover plate welding area of the connecting sheet is arranged at the position corresponding to the pole of the cover plate, and the connecting sheet is electrically connected with the cover plate through welding. The A-type winding core and the B-type winding core are turned by 90 degrees along the cover plate and are attached together.
Preferably, the height difference between the cover plate welding area and the lug welding area is 0.5-2 mm, and the arc between the cover plate welding area and the lug welding area is excessive.
Preferably, the notch of the tab welding area is arranged at one end far away from the welding area of the cover plate.
Preferably, the quantity of connection piece is 2, and wherein 1 connection piece material is copper for be connected with negative pole post and negative pole ear electricity, and 1 connection piece material is aluminium in addition for be connected with anodal post and anodal ear electricity.
Preferably, the number of the protection plates is 4, wherein 2 of the protection plates are made of copper and used for being electrically connected with the negative electrode tab, and the other 2 protection plates are made of aluminum and used for being electrically connected with the positive electrode tab.
Preferably, the height of the tab between the connecting sheet and the protective sheet accounts for 1/3-1/2 of the total height of the tab.
The utility model discloses a technological effect and advantage: the utility model provides a secondary lithium cell of many rolls up core compares with prior art, has following advantage:
1. the cover plate welding area and the lug welding area of the connecting sheet are designed in a stepped manner, after the lugs are welded, welding deformation only exists in the lug welding area, and the cover plate welding area is not affected by the welding deformation, so that the welding strength of the cover plate is improved;
2. the utility model discloses a utmost point ear weld zone sets up the breach, divides into two parts with the utmost point ear weld zone, and the utmost point ear of A book core and the utmost point ear of B book core can not influence each other when welding, have improved utmost point ear welding strength, and the setting of breach reduces the material quantity simultaneously, reduce cost;
3. the utility model discloses a set up solitary screening glass, and the size of screening glass is small and exquisite, and not only processing is convenient, and is with low costs moreover.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2, A is a schematic structural diagram of a winding core;
FIG. 3 is a schematic structural view of the cover plate;
FIG. 4 is a schematic structural view of a connecting sheet;
FIG. 5 is a schematic view of the structure of the protective sheet;
fig. 6, positioning diagram of the tab and the connecting sheet;
FIG. 7 shows the positioning of the protective sheet, tab and tab;
fig. 8 is a structural view showing the core a and the core B attached together.
In the figure: 1. the structure comprises an A-roll core 2, a cover plate 3, a B-roll core 4, a connecting sheet 5, a protective sheet 11, a tab 21, a pole 41, a cover plate welding area 42, a tab welding area 43, a tab welding A area 44, a notch 45 and a tab welding B area.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, 2 and 3, the multi-roll secondary lithium battery comprises a cover plate (2), an a-roll core (1), a B-roll core (3), 2 connecting sheets (4) and 4 protective sheets (5), wherein the cover plate (2) is provided with a positive pole post and a negative pole post, and the a-roll core (1) and the B-roll core (3) are provided with a positive pole lug and a negative pole lug.
As shown in fig. 4, the connecting plate (4) comprises a cover plate welding area (41) and a tab welding area (42) which are connected together, the cover plate welding area (41) and the tab welding area (42) are in a step shape, the tab welding area (42) is provided with a notch (44) which divides the tab welding area (42) into a tab welding area a (43) and a tab welding area B (45) symmetrically, and the notch (44) of the tab welding area (42) is arranged at one end far away from the cover plate welding area (41);
as shown in fig. 1 and 5, the protective sheet (5) has a size corresponding to the tab welding a area (43);
as shown in fig. 6, core (1) is rolled up to a and core (3) is rolled up to B symmetrical both sides of arranging in 2 connection pieces (4), and wherein 1 connection piece (4) material is copper, and 1 connection piece (4) material is aluminium in addition, the utmost point ear of core (1) is rolled up to a, and utmost point ear welding A district (43) of aluminium material connection piece (4) are arranged in to the utmost point ear of core (1), utmost point ear welding A district (43) of copper material connection piece (4) are arranged in to the negative pole ear of core (1) is rolled up to a, utmost point ear welding B district (45) of aluminium material connection piece (4) are arranged in to the utmost point ear of core (3) is rolled up to B, utmost point ear welding B district (45) of copper material connection piece (4) are. As shown in fig. 7, 2 protective sheets (5) made of aluminum were disposed above the positive electrode tab, 2 protective sheets (5) made of copper were disposed above the negative electrode tab, and the protective sheets (5) were disposed at positions corresponding to the tab welding a region (43) or the tab welding B region (45). The connecting sheet (4), the tab (11) and the protective sheet (5) are electrically connected by welding.
As shown in fig. 1, the cover plate weld area (41) of the aluminum connection piece (4) is provided at a position corresponding to the positive pole of the cover plate (2), and the cover plate weld area (41) of the copper connection piece (4) is provided at a position corresponding to the negative pole of the cover plate (2), and the connection piece (4) and the cover plate (2) are electrically connected by welding.
As shown in fig. 8, the a winding core (1) and the B winding core (3) are attached together along the cover plate (2) by turning 90 degrees.
Preferably, the height difference between the cover plate welding area (41) and the lug welding area (42) is 0.5-2 mm, and the arc between the cover plate welding area (41) and the lug welding area (42) is excessive.
Preferably, the height of the tab (11) between the connecting sheet (4) and the protective sheet (5) accounts for 1/3-1/2 of the total height of the tab (11).
The utility model discloses a technological effect and advantage:
1. the utility model discloses a apron weld zone (41) and utmost point ear weld zone (42) of connection piece (4) are the step type design, and after utmost point ear (11) welding, welding deformation only exists in utmost point ear weld zone (42), and welding deformation can not influence apron weld zone (41), thereby improves apron (2) welding strength;
2. the utility model discloses a utmost point ear welded area (42) set up breach (44), divide into two parts utmost point ear welded area (42), and utmost point ear (11) of A book core (1) and utmost point ear (11) of B book core (3) can not influence each other when welding, have improved utmost point ear (11) welding strength, and the material quantity is reduced to the setting of breach (44) simultaneously, reduce cost;
3. the utility model discloses a set up solitary screening glass (5), and screening glass (5) size is small and exquisite, and not only processing is convenient, and is with low costs moreover.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (7)
1. A multi-core secondary lithium battery comprises a cover plate (2), at least one A core (1) and at least one B core (3), the cover plate (2) is provided with a pole post (21), the pole post (21) comprises a positive pole post and a negative pole post, each A winding core (1) is provided with a pole lug (11), each B winding core (3) is provided with a pole lug (11), the pole lugs (11) comprise a positive pole lug and a negative pole lug, characterized in that the device also comprises a connecting sheet (4) and a protective sheet (5), the connecting sheet (4) comprises a cover plate welding area (41) and a tab welding area (42) which are connected together, the cover plate welding area (41) and the lug welding area (42) are in a step shape, and the lug welding area (42) is provided with a notch (44) which symmetrically divides the lug welding area (42) into a lug welding area A (43) and a lug welding area B (45); the size of the protective sheet (5) is consistent with that of the tab welding area A (43); the connecting piece (4) corresponds to the two protective sheets (5);
the A-roll core (1) and the B-roll core (3) are symmetrically arranged on two sides of the connecting sheet (4), a lug (11) of the A-roll core (1) is arranged in a lug welding A area (43), a lug (11) of the B-roll core (3) is arranged in a lug welding B area (45), the protective sheet (5) is arranged above the lug (11) and corresponds to the lug welding A area (43) or the lug welding B area (45), and the connecting sheet (4), the lug (11) and the protective sheet (5) are electrically connected through welding;
the cover plate welding area (41) of the connecting plate (4) is arranged at a position corresponding to the pole (21) of the cover plate (2), and the connecting plate (4) is electrically connected with the cover plate (2) through welding.
2. The lithium secondary battery of claim 1, wherein the height difference between the cap plate welding area (41) and the tab welding area (42) is 0.5 to 2mm, and the arc transition between the cap plate welding area (41) and the tab welding area (42) is excessive.
3. A multi-core lithium secondary battery as claimed in claim 1, wherein the notch (44) of the tab welding region (42) is provided at an end remote from the cap plate welding region (41).
4. A lithium secondary battery with multiple winding cores according to claim 1, characterized in that the number of the connecting pieces (4) is 2, wherein 1 connecting piece (4) is made of copper and is used for electrically connecting the negative pole post and the negative pole tab, and the other 1 connecting piece (4) is made of aluminum and is used for electrically connecting the positive pole post and the positive pole tab.
5. A lithium secondary battery with multiple winding cores according to claim 4, characterized in that the number of the protective sheets (5) is 4, 2 of them are made of copper for connecting with the negative electrode tab, and the other 2 are made of aluminum for connecting with the positive electrode tab.
6. The lithium secondary battery with multiple winding cores as claimed in claim 1, wherein the height of the tab (11) between the connecting sheet (4) and the protective sheet (5) is 1/3-1/2 of the total height of the tab (11).
7. A lithium secondary battery with multiple winding cores according to claim 1, characterized in that the a winding core (1) and the B winding core (3) are attached together along the cover plate (2) by turning 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920821723.6U CN210052815U (en) | 2019-06-03 | 2019-06-03 | Secondary lithium battery with multiple winding cores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920821723.6U CN210052815U (en) | 2019-06-03 | 2019-06-03 | Secondary lithium battery with multiple winding cores |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210052815U true CN210052815U (en) | 2020-02-11 |
Family
ID=69397087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920821723.6U Active CN210052815U (en) | 2019-06-03 | 2019-06-03 | Secondary lithium battery with multiple winding cores |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210052815U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599933A (en) * | 2020-12-17 | 2021-04-02 | 合肥国轩高科动力能源有限公司 | Multi-winding-core parallel assembly method of lithium battery |
| CN113707972A (en) * | 2021-09-22 | 2021-11-26 | 合肥国轩高科动力能源有限公司 | CTP high-integration lithium ion battery and manufacturing method thereof |
| CN114335662A (en) * | 2021-12-16 | 2022-04-12 | 瑞浦能源有限公司 | Method and structure for welding lithium ion pole piece and battery cell |
| CN114824678A (en) * | 2022-05-26 | 2022-07-29 | 江西安驰新能源科技有限公司 | Square lithium battery and assembling method thereof |
-
2019
- 2019-06-03 CN CN201920821723.6U patent/CN210052815U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599933A (en) * | 2020-12-17 | 2021-04-02 | 合肥国轩高科动力能源有限公司 | Multi-winding-core parallel assembly method of lithium battery |
| CN113707972A (en) * | 2021-09-22 | 2021-11-26 | 合肥国轩高科动力能源有限公司 | CTP high-integration lithium ion battery and manufacturing method thereof |
| CN114335662A (en) * | 2021-12-16 | 2022-04-12 | 瑞浦能源有限公司 | Method and structure for welding lithium ion pole piece and battery cell |
| CN114335662B (en) * | 2021-12-16 | 2024-04-09 | 瑞浦兰钧能源股份有限公司 | Method and structure for welding lithium ion pole piece and battery cell |
| CN114824678A (en) * | 2022-05-26 | 2022-07-29 | 江西安驰新能源科技有限公司 | Square lithium battery and assembling method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210052815U (en) | Secondary lithium battery with multiple winding cores | |
| CN205376627U (en) | Secondary battery | |
| CN110120488A (en) | A kind of multi-winding-core power battery | |
| CN102097511B (en) | Progressively welded packaging module | |
| CN214505504U (en) | Battery piece and photovoltaic module with same | |
| CN108707929B (en) | Anode steel claw guide rod group | |
| CN109148938B (en) | Battery welding method and battery | |
| CN114204224A (en) | Battery with a battery cell | |
| CN106450128A (en) | Battery group and electrode current piece thereof | |
| WO2016187815A1 (en) | Cylindrical high-rate lithium ion battery | |
| CN206116506U (en) | Group battery and utmost point flow thereof | |
| CN210349955U (en) | Battery connection row, battery and consumer | |
| CN216015521U (en) | Battery with a battery cell | |
| CN216529126U (en) | Battery cell module | |
| CN214477794U (en) | Electric connection assembly and battery module | |
| CN211759182U (en) | Battery cell tab fixing mechanism | |
| CN216529258U (en) | Battery and battery pack | |
| CN208000977U (en) | A kind of column lithium ion battery pole piece optimization structure | |
| CN101800329A (en) | Battery pack | |
| CN219226535U (en) | Battery connecting sheet for module and battery module | |
| CN110165135B (en) | Storage battery and negative plate tab pinching method thereof | |
| CN110620207A (en) | Soft connecting sheet for lithium ion battery and lithium ion battery | |
| CN209472043U (en) | A kind of lithium battery electrode tabs | |
| CN205104552U (en) | Square electric core parallel connection structure | |
| CN105449149B (en) | Electrode tab connection structure in a kind of lithium battery group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |