CN105261726A - Positive tab connection structure of battery and welding method - Google Patents
Positive tab connection structure of battery and welding method Download PDFInfo
- Publication number
- CN105261726A CN105261726A CN201510670289.2A CN201510670289A CN105261726A CN 105261726 A CN105261726 A CN 105261726A CN 201510670289 A CN201510670289 A CN 201510670289A CN 105261726 A CN105261726 A CN 105261726A
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- positive pole
- pole ear
- current carrying
- nickel current
- carrying lug
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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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
-
- 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
- H01M50/543—Terminals
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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 positive tab connection structure of a battery and a welding method, and aims at solving the problems that bad phenomena of welding instability, cold soldering, faulty soldering and the like are easily generated when tin soldering and electric resistance welding are utilized by an aluminum tab in an assembly process, the product quality cannot be effectively controlled, the aluminum tab is poor in connection reliability and a connection operation is inconvenient due to the fact that the positive tab of an existing soft package lithium battery is the aluminum tab and the aluminum tab is not easily connected and assembled with a tin bonding pad and a nickel bonding pad in the assembly process. The positive tab connection structure of the battery comprises a battery body, wherein the battery body is provided with the positive tab and the negative tab; a nickel current-carrying plate is welded on the positive tab; and a metal conductive clamp is detachably connected between the nickel current-carrying plate and the positive tab.
Description
Technical field
The present invention relates to a kind of lithium ion battery, more particularly, it relates to the reliable cell positive pole ear exchanging structure of a kind of connection and welding method.
Background technology
Lithium-ion-power cell, with the function of its excellence and characteristic, is widely used in every field.Combined by monomer battery core with the lithium ion battery of Soft Roll shape, be assembled into large-capacity battery pack, be applied to the fields such as electric bicycle, electric automobile and UPS gradually.And soft-package battery carries out serial or parallel connection with single battery core, carry out being assembled into rectangular configuration battery pack; It is aluminium material current carrying lug that the positive pole of each single-unit battery core in battery pack exports lug; the baffle pad of battery is generally soldering dish, nickel pad; the fusing point of aluminium is more much lower than the fusing point of nickel; so that aluminium pole ears is difficult to be linked and packed with soldering dish, nickel pad in assembling process; when aluminium material lug uses soldering, electric resistance welding in assembling process; the bad phenomenon such as easy appearance welding instability, dry joint, rosin joint, product quality can not effectively control.Also the structure of aluminum ear nickel-converting lug is had at present, but these anatomical connectivity poor reliability, attended operation inconvenience, inefficiency.
Chinese patent notification number CN201540912U, disclose a kind of aluminum ear nickel-converting structure, comprise a cpp aluminium pole ears group and a nickel lug group, cpp aluminium pole ears group and nickel lug group are fixed into the equal row of spacing with fixture respectively, and after each aluminium pole ears in cpp aluminium pole ears group aligns to corresponding nickel lug in nickel lug group, laser welding is fixed.This aluminum ear nickel-converting structure processing work efficiency is high, but connection reliability is poor, attended operation inconvenience.
Summary of the invention
Instant invention overcomes existing soft package lithium battery positive pole ear is aluminium pole ears, aluminium pole ears is difficult to and soldering dish in assembling process, nickel pad is linked and packed, when aluminium material lug uses soldering in assembling process, electric resistance welding, easy appearance welding is unstable, dry joint, the bad phenomenon such as rosin joint, product quality can not effectively control, and aluminium pole ears switching poor reliability, the deficiency of switch over operation inconvenience, provide a kind of cell positive pole ear exchanging structure and welding method, soft package lithium battery positive pole ear is easy and soldering dish in assembling process, nickel pad is linked and packed, lug uses soldering in assembling process, electric resistance welding, not easily occur that welding is unstable, dry joint, the bad phenomenon such as rosin joint, product quality can be controlled effectively, aluminium pole ears switching good reliability, switch over operation is convenient.
In order to solve the problems of the technologies described above, the present invention is by the following technical solutions: a kind of cell positive pole ear exchanging structure, comprise battery body, battery body is provided with positive pole ear, negative lug, positive pole ear is welded with nickel current carrying lug, between nickel current carrying lug and positive pole ear, is removably connected with metallic conduction folder.
The positive pole ear of aluminium material welds nickel current carrying lug, nickel current carrying lug, as cathode output end, can effectively be connected with soldering dish, nickel pad during assembling, connect internal resistance low, weld reliable and stable, drastically increase production quality and production efficiency, be more conducive to follow-up assembly working.Metallic conduction is clamped in the link position of nickel current carrying lug and positive pole ear, makes the connection of nickel current carrying lug and positive pole ear more steadily reliable, serves protective effect simultaneously, prevent Joint failure to link position.And the conductive energy of conductive fixture, the electric conductivity between nickel current carrying lug and positive pole ear can be improved further.Soft package lithium battery positive pole ear in assembling process easily and soldering dish, nickel pad be linked and packed, positive pole ear uses soldering, electric resistance welding in assembling process, not easily there is the bad phenomenon such as welding instability, dry joint, rosin joint, product quality can be controlled effectively, aluminium pole ears switching good reliability, switch over operation is convenient.
As preferably, nickel current carrying lug is zigzag step structure, and nickel current carrying lug comprises output terminal part, transition part, weld part, and weld part upper surface is provided with location notch, and positive pole ear is plugged in location notch, and positive pole ear end abutment is on transition part.Before nickel current carrying lug welds with positive pole ear, location notch is plugged on positive pole ear, and positive pole ear front end is connected on transition part, makes the lap position of nickel current carrying lug and positive pole ear more accurate, convenient location.
As preferably, output terminal part and transition part link position are provided with elastic clipping strip, and positive pole ear is arranged between weld part and elastic clipping strip.Elastic clipping strip is connected to positive pole ear thus realizes the connection location of nickel current carrying lug and positive pole ear, facilitates follow-up welding.
Another kind of scheme, weld part upper surface location notch both sides are equipped with the flange of fold inward, and the A/F between two flange upper ends is less than the width of positive pole ear, and the both sides of positive pole ear are connected between flange and weld part.Nickel current carrying lug is clamped on positive pole ear by flange, realizes the reliable connection of nickel current carrying lug and positive pole ear, and grafting location is convenient.
As preferably, two flange are equipped with the elasticity staking punch be inwardly stamped to form, positive pole ear both sides are equipped with clip slot, and elasticity staking punch is connected in clip slot.Elasticity staking punch on nickel current carrying lug is stuck in clip slot, effectively prevents play before and after between nickel current carrying lug and positive pole ear.
As preferably, positive pole ear is provided with several up big and down small welding holes in cone structure, and welding hole sidewall is provided with cannelure, and nickel current carrying lug is provided with several and welding hole pedestal one to one, and pedestal is arranged in welding hole.Pedestal is arranged in the welding hole of taper, and during laser welding, pedestal is together with welding hole fusion weld, and the welding hole of taper and the setting of cannelure, connect more firm after making both fusion weld.
As preferably, conductive clip comprises upper clamp and lower clamp, lower clamp is provided with two joint pins, upper clamp is provided with two spliced eyes corresponding with two joint pins, the joint pin in outside runs through nickel current carrying lug and is connected with the superolateral spliced eye of upper clamp, and inner side joint pin runs through nickel current carrying lug successively, positive pole ear is connected with the spliced eye of inner side on upper clamp.Joint pin on lower clamp is plugged into the interior clamping realized nickel current carrying lug and positive pole ear of spliced eye of upper clamp, and joint pin improves the electric conductivity connected between nickel current carrying lug and positive pole ear further as conductor simultaneously.
A kind of welding method of cell positive pole ear exchanging structure, the first step, cuts out out the nickel current carrying lug of suitable dimension, and positive pole ear bores row's taper welding hole, and cannelure is processed on welding hole sidewall, nickel current carrying lug stamps out the pedestal of a row and welding hole one_to_one corresponding adaptation; Second step, snaps on positive pole ear by nickel current carrying lug, and pedestal is aimed at welding hole and is also plugged in welding hole, then clamps nickel current carrying lug with locating clip and positive pole ear positions; 3rd step, loads onto high temperature resistant protective cover at the lap position of nickel current carrying lug and positive pole ear, exposes welding hole and pedestal; 4th step, adopt laser welder to weld, the laser beam of laser welder aims at pedestal successively, makes pedestal and welding hole fusion weld together; 5th step, after having welded, withdraws laser welder, unloads protective cover and locating clip, between nickel current carrying lug and positive pole ear, then connect metallic conduction folder.
Before laser welding, nickel current carrying lug processes taper welding hole and cannelure, positive pole ear processes pedestal, when welding, pedestal is together with welding hole fusion weld, the welding hole of taper and the setting of cannelure, connect more firm after making both fusion weld.Protective cover carries out insulation blocking to non-solder position, prevents non-solder position to be subject to the damage of laser.This welding manner is easy to operate, nickel current carrying lug and positive pole ear welding reliable, weld strength and conducting electricity very well.
As preferably, the first step, while the punching of nickel current carrying lug, strikes out the step structure of zigzag and stamps out location notch at nickel current carrying lug and positive pole ear overlap, then on zigzag nickel current carrying lug, transition face stamping out elastic clipping strip by nickel current carrying lug; Second step, positive pole ear is plugged between elastic clipping strip and nickel current carrying lug, and positive pole ear front end is connected on zigzag nickel current carrying lug transition face.
Before nickel current carrying lug welds with positive pole ear, location notch is plugged on positive pole ear, and positive pole ear is plugged between elastic clipping strip and nickel current carrying lug, and positive pole ear front end is connected on transition part, make the lap position of nickel current carrying lug and positive pole ear more accurate, convenient location.
Another kind of scheme, the first step, while the punching of nickel current carrying lug, nickel current carrying lug struck out the step structure of zigzag and stamp out the flange of fold inward at nickel current carrying lug and positive pole ear overlap both sides, then on flange, inwardly stamp out elasticity staking punch, then process the corresponding adaptive clip slot with elasticity staking punch in positive pole ear both sides; Second step, positive pole ear is plugged between flange and nickel current carrying lug, and positive pole ear front end is connected on zigzag nickel current carrying lug transition face, and elasticity staking punch is connected in clip slot.
Nickel current carrying lug is clamped on positive pole ear by flange, realizes the reliable connection of nickel current carrying lug and positive pole ear, and elasticity staking punch is connected in clip slot simultaneously, makes nickel current carrying lug be connected location with positive pole ear convenient, accurate.
Compared with prior art, the invention has the beneficial effects as follows: (1) soft package lithium battery positive pole ear in assembling process easily and soldering dish, nickel pad be linked and packed, lug uses soldering, electric resistance welding in assembling process, not easily there is the bad phenomenon such as welding instability, dry joint, rosin joint, product quality can be controlled effectively, aluminium pole ears switching good reliability, switch over operation is convenient; (2) nickel current carrying lug and positive pole ear welding operation are convenient, and welding process location is reliable, precisely, nickel current carrying lug with weld between positive pole ear reliable, weld strength with conduct electricity very well.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiments of the invention 1;
Fig. 2 is confined explosion's schematic diagram of embodiments of the invention 1;
Fig. 3 is confined explosion's schematic diagram of embodiments of the invention 2;
In figure: 1, battery body, 2, positive pole ear, 3, negative lug, 4, nickel current carrying lug, 5, conductive clip, 6, output terminal part, 7, transition part, 8, weld part, 9, location notch, 10, elastic clipping strip, 11, flange, 12, elasticity staking punch, 13, clip slot, 14, welding hole, 15, cannelure, 16, pedestal, 17, upper clamp, 18, lower clamp, 19, joint pin, 20, spliced eye.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is further described specifically:
Embodiment 1: a kind of cell positive pole ear exchanging structure (see accompanying drawing 1, accompanying drawing 2), comprise battery body 1, battery body is provided with positive pole ear 2, negative lug 3, positive pole ear is aluminium material lug, positive pole ear is welded with nickel current carrying lug 4, between nickel current carrying lug and positive pole ear, is removably connected with metallic conduction folder 5.Nickel current carrying lug is zigzag step structure, and nickel current carrying lug comprises output terminal part 6, transition part 7, weld part 8, and weld part upper surface is provided with location notch 9, and positive pole ear is plugged in location notch, and positive pole ear end abutment is on transition part.Output terminal part and transition part link position are provided with elastic clipping strip 10, and positive pole ear is arranged between weld part and elastic clipping strip.Elastic clipping strip is provided with two, is stamped to form.Positive pole ear is provided with the up big and down small welding hole 14 in cone structure of a row, and welding hole sidewall is provided with cannelure 15, and nickel current carrying lug is provided with several and welding hole pedestal 16 one to one, and pedestal is arranged in welding hole.Conductive clip comprises upper clamp 17 and lower clamp 18, lower clamp is provided with two joint pins 19, upper clamp is provided with two spliced eyes 20 corresponding with two joint pins, the joint pin in outside runs through nickel current carrying lug and is connected with the superolateral spliced eye of upper clamp, and inner side joint pin runs through nickel current carrying lug successively, positive pole ear is connected with the spliced eye of inner side on upper clamp.
The positive pole ear of aluminium material welds nickel current carrying lug, nickel current carrying lug, as cathode output end, can effectively be connected with soldering dish, nickel pad during assembling, connect internal resistance low, weld reliable and stable, drastically increase production quality and production efficiency, be more conducive to follow-up assembly working.Metallic conduction is clamped in the link position of nickel current carrying lug and positive pole ear, makes the connection of nickel current carrying lug and positive pole ear more steadily reliable, serves protective effect simultaneously, prevent Joint failure to link position.And the conductive energy of conductive fixture, the electric conductivity between nickel current carrying lug and positive pole ear can be improved further.Soft package lithium battery positive pole ear in assembling process easily and soldering dish, nickel pad be linked and packed, positive pole ear uses soldering, electric resistance welding in assembling process, not easily there is the bad phenomenon such as welding instability, dry joint, rosin joint, product quality can be controlled effectively, aluminium pole ears switching good reliability, switch over operation is convenient.
A kind of welding method of cell positive pole ear exchanging structure, the first step, cuts out out the nickel current carrying lug of suitable dimension, and positive pole ear bores row's taper welding hole, and cannelure is processed on welding hole sidewall, nickel current carrying lug stamps out the pedestal of a row and welding hole one_to_one corresponding adaptation; Second step, snaps on positive pole ear by nickel current carrying lug, and pedestal is aimed at welding hole and is also plugged in welding hole, then clamps nickel current carrying lug with locating clip and positive pole ear positions; 3rd step, loads onto high temperature resistant protective cover at the lap position of nickel current carrying lug and positive pole ear, exposes welding hole and pedestal; 4th step, adopt laser welder to weld, the laser beam of laser welder aims at pedestal successively, makes pedestal and welding hole fusion weld together; 5th step, after having welded, withdraws laser welder, unloads protective cover and locating clip, between nickel current carrying lug and positive pole ear, then connect metallic conduction folder.The first step, while the punching of nickel current carrying lug, strikes out the step structure of zigzag and stamps out location notch at nickel current carrying lug and positive pole ear overlap, then on zigzag nickel current carrying lug, transition face stamping out elastic clipping strip by nickel current carrying lug; Second step, positive pole ear is plugged between elastic clipping strip and nickel current carrying lug, and positive pole ear front end is connected on zigzag nickel current carrying lug transition face.This welding manner is easy to operate, nickel current carrying lug and positive pole ear welding reliable, weld strength and conducting electricity very well.
Embodiment 2: a kind of cell positive pole ear exchanging structure (see accompanying drawing 3), its structure is similar to embodiment 1, main difference point is that in the present embodiment, weld part upper surface location notch both sides are equipped with the flange 11 of fold inward, A/F between two flange upper ends is less than the width of positive pole ear, and the both sides of positive pole ear are connected between flange and weld part.Two flange are equipped with the elasticity staking punch 12 be inwardly stamped to form, positive pole ear both sides are equipped with clip slot 13, and elasticity staking punch is connected in clip slot.Other structure is identical with embodiment 1.Nickel current carrying lug is clamped on positive pole ear by flange, realizes the reliable connection of nickel current carrying lug and positive pole ear, and grafting location is convenient.Elasticity staking punch on nickel current carrying lug is stuck in clip slot, effectively prevents play before and after between nickel current carrying lug and positive pole ear.
A kind of welding method of cell positive pole ear exchanging structure, the first step, cuts out out the nickel current carrying lug of suitable dimension, and positive pole ear bores row's taper welding hole, and cannelure is processed on welding hole sidewall, nickel current carrying lug stamps out the pedestal of a row and welding hole one_to_one corresponding adaptation; Second step, snaps on positive pole ear by nickel current carrying lug, and pedestal is aimed at welding hole and is also plugged in welding hole, then clamps nickel current carrying lug with locating clip and positive pole ear positions; 3rd step, loads onto high temperature resistant protective cover at the lap position of nickel current carrying lug and positive pole ear, exposes welding hole and pedestal; 4th step, adopt laser welder to weld, the laser beam of laser welder aims at pedestal successively, makes pedestal and welding hole fusion weld together; 5th step, after having welded, withdraws laser welder, unloads protective cover and locating clip, between nickel current carrying lug and positive pole ear, then connect metallic conduction folder.The first step, while the punching of nickel current carrying lug, nickel current carrying lug struck out the step structure of zigzag and stamp out the flange of fold inward at nickel current carrying lug and positive pole ear overlap both sides, then on flange, inwardly stamp out elasticity staking punch, then process the corresponding adaptive clip slot with elasticity staking punch in positive pole ear both sides; Second step, positive pole ear is plugged between flange and nickel current carrying lug, and positive pole ear front end is connected on zigzag nickel current carrying lug transition face, and elasticity staking punch is connected in clip slot.
Above-described embodiment is two kinds of preferably schemes of the present invention, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (10)
1. a cell positive pole ear exchanging structure, comprises battery body, and battery body is provided with positive pole ear, negative lug, it is characterized in that, positive pole ear is welded with nickel current carrying lug, is removably connected with metallic conduction folder between nickel current carrying lug and positive pole ear.
2. cell positive pole ear exchanging structure according to claim 1, it is characterized in that, nickel current carrying lug is zigzag step structure, nickel current carrying lug comprises output terminal part, transition part, weld part, weld part upper surface is provided with location notch, positive pole ear is plugged in location notch, and positive pole ear end abutment is on transition part.
3. cell positive pole ear exchanging structure according to claim 2, is characterized in that, output terminal part and transition part link position are provided with elastic clipping strip, and positive pole ear is arranged between weld part and elastic clipping strip.
4. cell positive pole ear exchanging structure according to claim 2, it is characterized in that, weld part upper surface location notch both sides are equipped with the flange of fold inward, and the A/F between two flange upper ends is less than the width of positive pole ear, and the both sides of positive pole ear are connected between flange and weld part.
5. cell positive pole ear exchanging structure according to claim 4, is characterized in that, two flange are equipped with the elasticity staking punch be inwardly stamped to form, positive pole ear both sides are equipped with clip slot, and elasticity staking punch is connected in clip slot.
6. the cell positive pole ear exchanging structure according to claim 1 any one, it is characterized in that, positive pole ear is provided with several up big and down small welding holes in cone structure, welding hole sidewall is provided with cannelure, nickel current carrying lug is provided with several and welding hole pedestal one to one, and pedestal is arranged in welding hole.
7. the cell positive pole ear exchanging structure according to claim 1 to 6 any one, it is characterized in that, conductive clip comprises upper clamp and lower clamp, lower clamp is provided with two joint pins, upper clamp is provided with two spliced eyes corresponding with two joint pins, the joint pin in outside runs through nickel current carrying lug and is connected with the superolateral spliced eye of upper clamp, and inner side joint pin runs through nickel current carrying lug successively, positive pole ear is connected with the spliced eye of inner side on upper clamp.
8. the welding method of the cell positive pole ear exchanging structure described in claim 1 to 7 any one, it is characterized in that, the first step, cut out out the nickel current carrying lug of suitable dimension, positive pole ear bores row's taper welding hole, and cannelure is processed on welding hole sidewall, nickel current carrying lug stamps out the pedestal of a row and welding hole one_to_one corresponding adaptation; Second step, snaps on positive pole ear by nickel current carrying lug, and pedestal is aimed at welding hole and is also plugged in welding hole, then clamps nickel current carrying lug with locating clip and positive pole ear positions; 3rd step, loads onto high temperature resistant protective cover at the lap position of nickel current carrying lug and positive pole ear, exposes welding hole and pedestal; 4th step, adopt laser welder to weld, the laser beam of laser welder aims at pedestal successively, makes pedestal and welding hole fusion weld together; 5th step, after having welded, withdraws laser welder, unloads protective cover and locating clip, between nickel current carrying lug and positive pole ear, then connect metallic conduction folder.
9. the welding method of cell positive pole ear exchanging structure according to claim 1, it is characterized in that, the first step, while the punching of nickel current carrying lug, nickel current carrying lug struck out the step structure of zigzag and stamp out location notch at nickel current carrying lug and positive pole ear overlap, then on zigzag nickel current carrying lug, transition face stamping out elastic clipping strip; Second step, positive pole ear is plugged between elastic clipping strip and nickel current carrying lug, and positive pole ear front end is connected on zigzag nickel current carrying lug transition face.
10. the welding method of cell positive pole ear exchanging structure according to claim 1, it is characterized in that, the first step, while the punching of nickel current carrying lug, nickel current carrying lug struck out the step structure of zigzag and stamp out the flange of fold inward at nickel current carrying lug and positive pole ear overlap both sides, then on flange, inwardly stamp out elasticity staking punch, then process the corresponding adaptive clip slot with elasticity staking punch in positive pole ear both sides; Second step, positive pole ear is plugged between flange and nickel current carrying lug, and positive pole ear front end is connected on zigzag nickel current carrying lug transition face, and elasticity staking punch is connected in clip slot.
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| CN201510670289.2A CN105261726B (en) | 2015-10-13 | 2015-10-13 | Cell positive pole ear exchanging structure and welding method |
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| CN201510670289.2A CN105261726B (en) | 2015-10-13 | 2015-10-13 | Cell positive pole ear exchanging structure and welding method |
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| CN105261726A true CN105261726A (en) | 2016-01-20 |
| CN105261726B CN105261726B (en) | 2017-09-26 |
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| CN106825959A (en) * | 2017-03-21 | 2017-06-13 | 无锡奥特维智能装备有限公司 | Battery pole ear welding equipment |
| CN107369853A (en) * | 2016-05-13 | 2017-11-21 | 宁德时代新能源科技股份有限公司 | Electrochemical energy storage device |
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| US20200313145A1 (en) * | 2019-03-29 | 2020-10-01 | Ningde Amperex Technology Limited | Electrode assembly |
| CN112518119A (en) * | 2020-11-23 | 2021-03-19 | 浙江霖润新能源科技有限公司 | Tab welding process of nickel-based high-energy battery |
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| US11646473B2 (en) * | 2019-03-29 | 2023-05-09 | Ningde Amperex Technology Limited | Electrode assembly |
| CN110061177A (en) * | 2019-05-05 | 2019-07-26 | 昆山长盈精密技术有限公司 | Battery modules connection system |
| CN112518119A (en) * | 2020-11-23 | 2021-03-19 | 浙江霖润新能源科技有限公司 | Tab welding process of nickel-based high-energy battery |
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| CN105261726B (en) | 2017-09-26 |
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