CN106328879B - Battery tab forming equipment and battery tab forming method - Google Patents
Battery tab forming equipment and battery tab forming method Download PDFInfo
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- CN106328879B CN106328879B CN201510369404.2A CN201510369404A CN106328879B CN 106328879 B CN106328879 B CN 106328879B CN 201510369404 A CN201510369404 A CN 201510369404A CN 106328879 B CN106328879 B CN 106328879B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
- B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
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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
Abstract
The invention discloses a battery tab forming device and a battery tab forming method. The battery tab forming equipment comprises an unreeling mechanism, a tensioning mechanism, a reeling mechanism, a control system, a first die cutting knife group, a second die cutting knife group and a punching platform; the punching platform is in transmission connection with the first die cutting knife group and the second die cutting knife group, the first die cutting knife group and the second die cutting knife group can move synchronously in the tape moving direction, and the first die cutting knife group and the second die cutting knife group can punch in moving. The battery tab forming method is a method for forming the tabs of the battery pole pieces by using the battery tab forming equipment. Compared with the prior art, the die-cutting machine realizes the one-time die-cutting and continuous die-cutting of two groups of tabs by improving the die-cutting knife group, the die-cutting platform and the control program, improves the comprehensive speed by more than 1.5-2 times, and can effectively prevent burrs from being formed during the die-cutting, thereby having the advantages of continuous production, higher speed and low safety risk.
Description
Technical Field
The invention belongs to the field of lithium ion battery manufacturing, and particularly relates to battery tab forming equipment and a battery tab forming method.
Background
The battery tab forming equipment of the existing electric automobile battery is only provided with a group of die cutting knife sets, and the punching of the tab can be carried out only when the battery pole piece is static, therefore, the steps of the existing tab forming are as shown in figure 1: 1) starting up, tensioning the battery pole piece 10, and punching a first knife by the die cutter group 12; 2) the moving distance of the battery pole piece 10 is D 1 Stopping, and punching the second knife by the die knife group 12; 3) the moving distance of the battery pole piece 10 is D 2 Stopping punching, and punching a third knife by the die cutter set; 4) and so on, tape-feeding, stopping, die-cutting … … until the nth knife; 5) repeating steps 1) to 4). It can be seen that, because the punching action is frequent, and the battery pole piece 10 must stop moving forward during each punching, the production efficiency is very low, and the speed is only 12-15 m/min at the fastest speed.
In addition, referring to fig. 2, the long side of the conventional die cutter set 12 is parallel to the long side of the battery pole piece 10. Because the distance between the pole lugs 14 is increased, the pole lugs must be punched in a staggered mode, so that the punching edge of the pole piece is easy to be drawn by the punching cutter set, and safety risks are brought to the battery.
In view of the above, it is necessary to provide a battery tab forming apparatus and a battery tab forming method capable of solving the above problems.
Disclosure of Invention
The invention aims to: the battery tab forming equipment is high in speed, and the battery tab forming method using the equipment is provided, so that the production efficiency is improved, and the wire drawing of the punching edge of the battery pole piece is avoided.
In order to achieve the purpose, the invention provides battery tab forming equipment which comprises an unreeling mechanism, a tensioning mechanism, a reeling mechanism, a control system, a first die cutting knife set, a second die cutting knife set and a punching platform, wherein the unreeling mechanism is arranged on the unreeling mechanism; the punching platform is in transmission connection with the first die cutting knife group and the second die cutting knife group, the first die cutting knife group and the second die cutting knife group can move synchronously in the tape moving direction, and the first die cutting knife group and the second die cutting knife group can punch in moving.
As an improvement of the battery tab forming equipment, the long edges of the group cutters of the first die cutter group and the second die cutter group are arranged to form an angle A with the long edge of the battery pole piece, and the angle A is more than or equal to 1 degree and less than or equal to 45 degrees, so that edge wire drawing during dislocation punching is prevented.
As an improvement of the battery tab forming equipment, the first die cutting knife group and the second die cutting knife group are arranged in the front-back sequence in the tape transport direction of the battery pole piece, and are simultaneously used for punching, and the punching distance is adjustable.
As an improvement of the battery tab forming equipment, the control system is respectively connected with the first die cutting knife group, the second die cutting knife group and the punching platform through control signals and controls the coordination action of the first die cutting knife group, the second die cutting knife group and the punching platform, so that the whole set of battery tab forming equipment can carry out tab forming automatically and continuously.
As an improvement of the battery tab forming device, the punching action time t of the first die cutter set and the second die cutter set meets t < (1/2-1/3) > (D1/V), wherein D1 is the minimum value of the distance between adjacent tabs, and V is the tape travelling speed of a battery tab.
As an improvement of the battery tab forming equipment, the control system is also respectively connected with the tensioning mechanism, the unreeling mechanism and the reeling mechanism through control signals and controls the actions of the tensioning mechanism, the unreeling mechanism and the reeling mechanism.
As an improvement of the battery tab forming equipment, the stroke length L of the punching platform is as follows: when N is odd and (N/2+0.5) is also odd, the stroke L > 2(N-1) × G; when N is odd and (N/2+0.5) is even, the stroke L > 2(N-2) × G; when N is an even number and (N/2+1) is an odd number, the stroke L > 2N × G; when N is an even number and (N/2+1) is an even number, the stroke L > 2(N-1) × G; in the above formula, N is the number of tabs to be punched on each side of a single battery pole piece, and G is the fixed difference between the adjacent tab spacings.
In order to achieve the above object, the present invention further provides a battery tab forming method, which uses the battery tab forming apparatus described in any of the above paragraphs to form a tab, wherein the punching platform, the first die cutting knife group and the second die cutting knife group all move synchronously with a battery pole piece to be punched, and the first die cutting knife group and the second die cutting knife group punch a tab on a battery pole piece being fed in a moving process.
As an improvement of the battery tab forming method, the method comprises the following steps:
1) starting the machine, tensioning the battery pole piece to be punched, and automatically adjusting the distance between two groups of cutters of the first die cutting cutter group and the second die cutting cutter group to S under the control of the control system 1 ＝D 1 +D 2 (ii) a D is the distance between adjacent tabs, D 1 The center distance D between the first tab and the second tab in the single battery pole piece n The center distance D between the nth tab and the (n +1) th tab in the single battery pole piece 1 +D 2 Namely equal to the center distance from the first tab to the third tab;
2) the belt is transported, the punching platform, the first die cutting knife group and the second die cutting knife group move synchronously with the battery pole piece under the control of the control system, and the first die cutting knife group and the second die cutting knife group punch a first knife in the moving process;
3) continuously conveying the belt, quickly resetting the punching platform to the initial position, simultaneously moving the first die cutting knife group and the second die cutting knife group back, and automatically adjusting the distance between the two groups of knives to S 2 、S 3 ……S m (ii) a In the process that the punching platform, the first die cutting knife group and the second die cutting knife group move synchronously with the battery pole piece, the first die cutting knife group and the second die cutting knife group punch a second knife and a third knife … … m in sequence; wherein m is>1 and is even, S m ＝D (2m-2) +D (2m-1) ，m>1 and is odd, S m ＝D (2m-1) +D 2m ；
4) The above actions are circulated until the distance between the two groups of knives is automatically adjusted to S M ＝D N+1 +D N Punching the M-th knife serving as the last knife to complete the punching of the single battery pole piece; n is the number of the pole lugs required to be punched on each side of the single battery pole piece;
5) continuously feeding, quickly resetting the punching platform to the initial position, simultaneously moving the first die cutting knife group and the second die cutting knife group back, and automatically adjusting the distance between the two groups of knives back to S 1 ＝D 1 +D 2 (ii) a And then repeating the steps 2) to 4) to punch the next pole piece.
As an improvement of the battery tab forming method, for the battery pole piece with the difference G between the adjacent tab intervals as a fixed value, in the tab forming process of a single battery pole piece: when punching the even number of knives, the space S between the two groups of knives m The distance is increased by 2G compared with the distance of the previous knife; when punching the odd-numbered knives except the first knife, the space S between the two groups of knives m The distance between the two cutters is increased by 6G.
Compared with the prior art, through the improvement to die-cutting knife tackle, die-cut platform and control procedure, realized once die-cut two sets of utmost point ear and continuous die-cut, will synthesize speed and promoted more than 1.5 ~ 2 times, form the burr when moreover can also effectively preventing die-cut, consequently have continuous production, speed advantage fast, that the safety risk is low.
Drawings
The battery tab forming apparatus, the battery tab forming method and the advantageous effects thereof according to the present invention will be described in detail with reference to the accompanying drawings and the detailed description. Wherein:
fig. 1 is a schematic diagram illustrating a punching process of a conventional battery tab forming method.
Fig. 2 is a schematic diagram of the staggered punching of a die cutter set of the existing battery tab forming equipment.
Fig. 3 is a schematic composition diagram of a battery tab forming apparatus of the present invention;
fig. 4 is a schematic diagram of the staggered punching of the die cutter set of the battery tab forming equipment.
Fig. 5 is a schematic view illustrating a punching process of the battery tab forming method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present invention clearer, the present invention is described in further detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration only.
Referring to fig. 3 and 4, the battery tab forming apparatus of the present invention is a full-automatic continuous tab forming apparatus, which includes a first die cutter set 21, a second die cutter set 22, a punching platform 23, a tensioning mechanism 24, an unwinding mechanism 25, a winding mechanism 26, and a control system 27.
The unwinding mechanism 25, the tensioning mechanism 24 and the winding mechanism 26 are substantially the same in structure as the corresponding structure of the existing battery tab forming equipment, and are respectively used for unwinding, tensioning and winding the battery pole piece 30.
The first die cutter set 21 and the second die cutter set 22 are arranged in the front-back sequence in the tape moving direction of the battery pole piece 30, and the distance between the first die cutter set and the second die cutter set is adjustable.
The punching platform 23 is in transmission connection with the first die cutting set 21 and the second die cutting set 22, and can synchronously move together with the first die cutting set 21 and the second die cutting set 22 in the tape transport direction.
The control system 27 is connected with the first die cutting knife group 21, the second die cutting knife group 22, the punching platform 23, the tensioning mechanism 24, the unreeling mechanism 25 and the reeling mechanism 26 respectively through control signals and controls the actions of the first die cutting knife group, the second die cutting knife group 22, the punching platform 23, the tensioning mechanism 24, the unreeling mechanism 25 and the reeling mechanism 26, so that the whole set of battery tab forming equipment can form the tabs 34 automatically and continuously.
According to the invention, the long edges of the first die cutter group 21 and the second die cutter group 22 form an angle A with the long edge of the battery pole piece 30, and A is more than or equal to 1 degree and less than or equal to 45 degrees, so that the edge wire drawing condition during dislocation punching is effectively prevented, the formation of burrs is avoided, and the safety of the battery is improved.
For ease of explanation, the following definitions are first given: the number of the tabs 34 required to be formed on each side of the single battery pole piece 30 is N; the distance between the adjacent tabs 34 is D, D 1 Refers to the center distance, D, between the first tab and the second tab of a single battery pole piece 30 n The center distance between the nth pole lug and the (n +1) th pole lug in the single battery pole piece 30, namely the distance between the pole lugs 34 is D in sequence 1 、D 2 、D 3 ......D N (N is more than or equal to 2), and the difference between the adjacent distances is G, namely D 2 -D 1 ＝G、D 3 -D 2 ＝G、D 4 -D 3 ＝G、……D n -D (n-1) G; when the tab 34 is formed using the above-described battery tab forming apparatus, the belt running speed of the battery pole piece 30 is set to V.
In the battery tab forming apparatus of the present invention, then, the requirements of the respective parameters are as follows:
1) punching time t: the punching action time t of the first die cutter group 21 and the second die cutter group 22 is less than (1/2-1/3) (D) 1 /V)；
2) Stroke length L of punching stage 23:
when the number N of the tabs 34 required to be punched on each side of the single battery pole piece 30 is odd: if (N/2+0.5) is also odd, the stroke L must be greater than 2(N-1) G; if (N/2+0.5) is even, the stroke L must be greater than 2(N-2) G;
when the number N of the tabs 34 to be punched on each side of the single battery pole piece 30 is an even number: if (N/2+1) is odd, the stroke L must be greater than 2N × G; if (N/2+1) is an even number, the stroke L must be greater than 2(N-1) × G.
Referring to fig. 5, the method for forming the battery tab of the present invention includes the following steps:
1) starting up, under the control of the control system, tensioning the battery pole piece 30, and spacing the two groups of the first die-cutting knife group 21 and the second die-cutting knife group 22Automatically adjusted to S1 ═ D 1 +D 2 I.e., equal to the center-to-center distance of the first tab 34 to the third tab 34;
2) the belt is transported, under the control of a control system, the punching platform 23, the first die cutter group 21 and the second die cutter group 22 move synchronously with the battery pole piece 30, and in the moving process, the first die cutter group 21 and the second die cutter group 22 simultaneously punch a first knife;
3) the belt is continuously fed, the punching platform 23 is quickly reset to the initial position, the first die cutting knife group 21 and the second die cutting knife group 22 are also moved back, and the distance between the two groups of knives is automatically adjusted to be S 2 ＝D 2 +D 3 I.e. the distance between the two knife sets is increased by 2G (D) relative to the initial state 2 +D 3 )-(D 1 +D 2 ) (ii) a In the process that the punching platform 23, the first die cutting knife group 21, the second die cutting knife group 22 and the battery pole piece 30 synchronously move, the first die cutting knife group 21 and the second die cutting knife group 22 punch the second knife;
4) the belt is continuously fed, the punching platform 23 is quickly reset to the initial position, the first die cutting knife group 21 and the second die cutting knife group 22 are also moved back, and the distance between the two groups of knives is automatically adjusted to be S 3 ＝D 5 +D 6 That is, the distance between two sets of blades is increased by 6G (D) relative to the previous state 5 +D 6 )-(D 2 +D 3 ) (ii) a In the process that the punching platform 23, the first die cutting knife group 21, the second die cutting knife group 22 and the battery pole piece 30 synchronously move, the first die cutting knife group 21 and the second die cutting knife group 22 punch a third knife;
5) the belt is continuously fed, the punching platform 23 is quickly reset to the initial position, the first die cutting knife group 21 and the second die cutting knife group 22 are also moved back, and the distance between the two groups of knives is automatically adjusted to be S m ，m>1 and is even, S m ＝D (2m-2) +D (2m-1) ，m>1 and is odd, S m ＝D (2m-1) +D 2m (ii) a In the process of synchronous movement of the punching platform 23, the first die cutting knife group 21, the second die cutting knife group 22 and the battery pole piece 30, the first die cutting knife group and the second die cutting knife group punch the mth knife;
6) the above actions are circulated until the space between the two groups of knivesIs automatically adjusted to S M ＝D N+1 +D N Punching the M-th knife serving as the last knife to finish the punching of the single battery pole piece; when N is an odd number, M is (N/2+0.5), and when N is an even number, M is (N/2+ 1);
7) the tape is continuously fed, the punching platform 23 is quickly reset to the initial position, the first die cutting blade group 21 and the second die cutting blade group 22 are also moved back, and the distance between the two groups of blades is automatically adjusted to S 1 ＝D 1 +D 2 (ii) a And continuing to walk, and repeating the steps 2) to 6), and punching the next battery pole piece 30.
As can be seen from the above description, the battery tab forming apparatus and the forming method according to the present invention have at least the following advantages over the prior art: 1) by adding one die cutting knife group, two groups of tabs 34 are punched each time, and the punching speed is increased by 1 time; 2) the punching platform 23 is set to be capable of synchronously moving with the die cutting groups 21 and 22 in the tape-feeding direction, the control program is optimized to enable the distance between the two die cutting groups 21 and 22 to be adjustable, and the punching action is synchronous with the tape-feeding, so that continuous punching is realized, and the production efficiency is improved by 0.5-1 time; 3) the long edges of the die cutting knife sets 21 and 22 are set to form an angle with the long edges of the battery pole pieces 30, edge wire drawing and burr formation during dislocation punching are effectively prevented, and the safety risk of the battery is reduced.
In conclusion, the die-cutting machine realizes the one-time die-cutting and continuous die-cutting of two groups of lugs 34 by improving the die-cutting knife group, the die-cutting platform 23 and the control program, improves the comprehensive speed by more than 1.5-2 times, and can effectively prevent burrs from being formed during the die-cutting, thereby having the advantages of continuous production, higher speed and low safety risk.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. The utility model provides a battery tab former, its includes unwinding mechanism, straining device, winding mechanism and control system, its characterized in that: the die cutting machine also comprises a first die cutting knife group, a second die cutting knife group and a die cutting platform; the punching platform is in transmission connection with the first die cutting knife group and the second die cutting knife group, the first die cutting knife group and the second die cutting knife group can move synchronously in the tape moving direction, and the first die cutting knife group and the second die cutting knife group can punch in moving.
2. The battery tab forming apparatus as claimed in claim 1, wherein: the long edges of the group cutters of the first die cutter group and the second die cutter group are all set to form an angle A with the long edge of the battery pole piece, and the angle A is not less than 1 degree and not more than 45 degrees, so that edge wire drawing during dislocation punching is prevented.
3. The battery tab forming apparatus as claimed in claim 1, wherein: the first die cutting group and the second die cutting group are sequentially arranged in the front-back direction of the battery pole piece in the belt moving direction, the first die cutting group and the second die cutting group are simultaneously used for punching, and the punching distance is adjustable.
4. The battery tab forming apparatus as claimed in claim 3, wherein: the control system is respectively connected with the first die cutting knife group, the second die cutting knife group and the punching platform through control signals and controls the coordination action of the first die cutting knife group, the second die cutting knife group and the punching platform, so that the whole set of battery tab forming equipment can carry out tab forming automatically and continuously.
5. The battery tab forming apparatus as claimed in claim 4, wherein: and the punching action time t of the first die cutter group and the second die cutter group meets t < (1/2-1/3) > (D1/V), wherein D1 is the minimum value of the distance between the adjacent tabs, and V is the tape speed of the battery pole piece.
6. The battery tab forming apparatus as claimed in claim 5, wherein: the control system is also respectively connected with the tensioning mechanism, the unreeling mechanism and the reeling mechanism through control signals and controls the actions of the tensioning mechanism, the unreeling mechanism and the reeling mechanism.
7. The battery tab forming apparatus as claimed in claim 1, wherein: the stroke length L of the punching platform is as follows: when N is odd and (N/2+0.5) is also odd, the stroke L > 2(N-1) × G; when N is odd and (N/2+0.5) is even, the stroke L > 2(N-2) × G; when N is an even number and (N/2+1) is an odd number, the stroke L > 2N × G; when N is an even number and (N/2+1) is an even number, the stroke L > 2(N-1) × G; in the above formula, N is the number of tabs to be punched on each side of a single battery pole piece, and G is the fixed difference between the adjacent tab spacings.
8. A battery tab forming method is characterized in that: the battery tab forming equipment of any one of claims 1 to 7 is adopted for tab forming, the punching platform, the first die cutting knife group and the second die cutting knife group move synchronously with a battery pole piece to be punched, and the first die cutting knife group and the second die cutting knife group punch the tab of the battery pole piece which is being carried in the moving process.
9. The battery tab forming method as claimed in claim 8, characterized by comprising the steps of:
1) starting the machine, tensioning the battery pole piece to be punched, and automatically adjusting the distance between two groups of cutters of the first die cutting cutter group and the second die cutting cutter group to S under the control of the control system 1 ＝D 1 +D 2 (ii) a D is the distance between adjacent tabs, D 1 The center distance D between the first tab and the second tab in the single battery pole piece n The center distance D between the nth tab and the (n +1) th tab in the single battery pole piece 1 +D 2 Namely equal to the center distance from the first tab to the third tab;
2) the belt is transported, the punching platform, the first die cutting knife group and the second die cutting knife group move synchronously with the battery pole piece under the control of the control system, and the first die cutting knife group and the second die cutting knife group punch a first knife in the moving process;
3) continuously moving, quickly resetting the punching platform to the initial position, simultaneously moving the first die cutting knife group and the second die cutting knife group back, and automatically adjusting the distance between the two groups of knives to S 2 、S 3 ……S m (ii) a In the process that the punching platform, the first die cutting knife group and the second die cutting knife group move synchronously with the battery pole piece, the first die cutting knife group and the second die cutting knife group punch a second knife and a third knife … … m in sequence; wherein m is>1 and is even, S m ＝D (2m-2) +D (2m-1) ，m>1 and is odd, S m ＝D (2m-1) +D 2m ；
4) The above actions are circulated until the distance between the two groups of knives is automatically adjusted to S M ＝D N+1 +D N Punching the M-th knife serving as the last knife to finish the punching of the single battery pole piece; n is the number of the pole lugs required to be punched on each side of the single battery pole piece;
5) continuously moving, quickly resetting the punching platform to the initial position, simultaneously moving the first die cutting set and the second die cutting set back, and automatically adjusting the distance between the two sets of cutters back to S 1 ＝D 1 +D 2 (ii) a And then repeating the steps 2) to 4) to punch the next pole piece.
10. The battery tab forming method as claimed in claim 9, wherein: for the battery pole piece with the difference G between the adjacent pole ear spaces as a fixed value, in the pole ear forming process of a single battery pole piece: when punching the even number of knives, the space S between the two groups of knives m The distance is increased by 2G compared with the distance of the previous knife; when punching the odd-numbered knives except the first knife, the space S between the two groups of knives m The distance between the two cutters is increased by 6G.
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| US10431816B2 (en) * | 2017-07-17 | 2019-10-01 | GM Global Technology Operations LLC | Battery cell with increased tab area and method and apparatus for manufacturing same |
| CN107685200A (en) * | 2017-08-28 | 2018-02-13 | 浙江永宏电气股份有限公司 | The non-linear cutting method of center of circle battery pole ear |
| CN109759496B (en) * | 2018-12-17 | 2020-05-05 | 广东新宇智能装备有限公司 | Tab punching method applied to battery winding process |
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| CN102364721A (en) * | 2011-10-24 | 2012-02-29 | 陈红勇 | Battery tab forming apparatus |
| CN102765105A (en) * | 2012-06-26 | 2012-11-07 | 全椒海丰印刷包装有限公司 | Full-automatic die-cutting machine |
| CN203787498U (en) * | 2014-04-18 | 2014-08-20 | 宁德时代新能源科技有限公司 | Electrode lug connecting structure of battery pack |
| CN203991896U (en) * | 2014-06-16 | 2014-12-10 | 东莞市斯宇自动化设备有限公司 | The continuous sheet-punching machine of a kind of high accuracy |
| CN204809298U (en) * | 2015-06-30 | 2015-11-25 | 宁德时代新能源科技有限公司 | Battery tab former |
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| CN106328879A (en) | 2017-01-11 |
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