CN206163595U

CN206163595U - Utmost point ear welding frock and electric core

Info

Publication number: CN206163595U
Application number: CN201621254494.7U
Authority: CN
Inventors: 华传山; 陶涛
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2016-11-22
Filing date: 2016-11-22
Publication date: 2017-05-10
Anticipated expiration: 2026-11-22

Abstract

The utility model relates to an energy storage device produces technical field, especially relates to an utmost point ear welding frock and electric core. Utmost point ear welding frock includes bonding tool and base, the bonding tool with in the base, one are equipped with the recess, and another person is equipped with the plush copper, the recess with the plush copper is relative, and forms the work piece between the two and hold the chamber, the work piece holds the chamber and is used for holding the utmost point ear and the mass flow body, just the recess with the plush copper is used for forming extremely supra -auricular arc structure. Utmost point ear that this application provided welding frock sets up recess and plush copper respectively through on base and the bonding tool, through the extrusion of plush copper with the recess, can utmost point ear goes up the back welding in the mass flow body, formation bending structure, and then coil into the electric core of cylindrical structure, like this, at the coiling in -process, extremely unfamiliar coiling shape can be complied with to the tip of ear both sides to avoid utmost point ear to impale the diaphragm, guarantee the security and the reliability of electric core.

Description

Tab welding frock and battery core

Technical field

The application is related to energy storage device production technical field, more particularly to a kind of tab welding frock and battery core.

Background technology

Lithium ion battery majority adopts winding-structure, usual battery core to include lug, collector and positioned at adjacent two layers collection Barrier film between fluid, lug is planar structure with collector, and in battery core plus man-hour, lug keeps flat on a current collector, adopts The mode of downhand welding welds it with collector, has welded rear lug and collector still keeps planar structure.

Existing this welding manner, if electric core winding is cylindrical structural, lug draws from the end of cylindrical structure Go out, due to being planar structure after lug and collector welding, in winding process, the barrier film in battery core can force lug to squeeze Bending is pressed into, especially when lug is thicker, rigidity is stronger, the end face of lug both sides can be bigger by the extruding force of barrier film, easily Barrier film and the gummed paper in battery core are pierced through in the end for causing lug both sides, so as to cause internal short-circuit, affect the self-discharge rate of battery core.

Utility model content

This application provides a kind of tab welding frock and battery core, can solve the problem that the problems referred to above.

The first aspect of the application provides a kind of tab welding frock, including soldering tip and base, the soldering tip with it is described In base, one is provided with groove, and another one is provided with plush copper, and the groove is relative with the plush copper, and forms workpiece therebetween Accommodating chamber, the workpiece accommodating chamber is used to accommodate lug and collector, and the groove is used to form the pole with the plush copper Warp architecture on ear.

Preferably, the groove is arc groove, and the plush copper is inserted into the groove；

And/or

The plush copper is arc plush copper.

Preferably, radius of the radius of the groove not less than the plush copper.

Preferably, the difference of the radius of the radius of the groove and the plush copper is the thickness of the lug and the collector Sum.

Preferably, the depth of the groove is not more than the thickness of the lug, the thickness of the collector and described convex The height sum of head.

Preferably, width of the arc length of the plush copper more than the lug.

Preferably, the soldering tip or the outer wall of the base that the inwall of the groove is located with it is connected by cambered surface Connect.

Preferably, the plush copper is located at the base, and the groove is located at the soldering tip.

The second aspect of the application provides a kind of battery core, and the battery core includes lug and collector, the lug and institute State collector to be formed by the tab welding frock described in any of the above-described, and the lug has warp architecture.

Preferably, including housing and fluid sealant, the lug stretches out the housing, and the housing passes through institute with the lug State sealant sealing.

The technical scheme that the application is provided can reach following beneficial effect：

Tab welding frock provided herein, by being respectively provided with groove and plush copper on base and soldering tip, by convex Head and the extruding of groove, can form warp architecture by lug after being welded on collector, and cylindrical knot is then wound into again The battery core of structure, so, in winding process, the winding form of compliant diaphragm is capable of in the end of lug both sides, so as to avoid lug Pierce through barrier film, it is ensured that the safety and reliability of battery core.

It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary, this can not be limited Application.

Description of the drawings

Fig. 1 is a kind of structural representation of specific embodiment of tab welding frock provided herein；

Fig. 2 is the structural representation using the lug after tab welding frock welding provided herein with collector；

Fig. 3 is a kind of structural representation of specific embodiment of battery core provided herein.

Reference：

10- soldering tips；

101- grooves；

20- bases；

201- plush coppers；

30- collectors；

40- lugs；

50- housings；

60- fluid sealants.

Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the enforcement for meeting the application Example, and be used to explain the principle of the application together with specification.

Specific embodiment

Below by specific embodiment and combine accompanying drawing the application is described in further detail.

As shown in figure 1, the embodiment of the present application provide a kind of tab welding frock, for by tab welding in collector On, it is particularly useful for being wound into the welding of the lug with collector of cylindrical electrical core.Tab welding frock includes soldering tip 10 and base 20, In soldering tip 10 and base 20, one is provided with groove, and another one is provided with plush copper, and such as Fig. 1 shows that soldering tip 10 is provided with groove 101, bottom Seat 20 is provided with the structure of plush copper 201, and groove 101 is relative with plush copper 101, and forms workpiece accommodating chamber therebetween, and workpiece is accommodated Chamber is used to accommodate lug 40 and collector 30, and groove 101 is used to form the warp architecture on lug 40 with plush copper 201.

Above-mentioned tab welding frock, by being respectively provided with groove 101 and plush copper 201 on base 20 and soldering tip 10, in battery core Before winding, first lug 40 and collector 30 are positioned over into workpiece accommodating chamber, make plush copper 201 and the extruding lug 40 of groove 101 with Collector 30, then welds, so that lug 40 is after being welded on collector 30, lug forms warp architecture, such as Fig. 2 institutes Show, the battery core of cylindrical structural be then wound into again, so, in winding process, the end of the both sides of lug 40 can comply with every The winding form of film, so as to avoid lug 40 from piercing through barrier film, it is ensured that the safety and reliability of battery core.

In order to better ensure that lug 40 does not pierce through barrier film in winding, following several ways can be adopted：The first side Formula, groove 101 is arc groove, and plush copper 201 is inserted into groove 101, to make lug when extruding in plush copper 201 and groove 101 40 can bend along the cambered surface of groove 101.Second, plush copper 201 is arc plush copper, and now, plush copper 201 may be inserted into groove 101 bottom squeezes for realizing plush copper 201 and groove 101, it is also possible to plush copper 201 is extruded at the opening of groove 101, no matter which kind of side Formula, lug 40 bends each along the cambered surface of plush copper 201.The third, plush copper 201 is arc plush copper, and groove 101 is arc groove.

The cambered surface of above-mentioned arc groove and the cambered surface of arc plush copper are preferably arc surface, and its cambered surface radius is according to being wound into The winding radius of the battery core of cylindrical structure determine.Certainly the cambered surface of arc groove and the cambered surface of arc plush copper can also be ellipse Cambered surface.

Further, it is arc groove in groove 101, and plush copper 201 is when being arc plush copper 201, the half of preferred groove 101 Footpath, to ensure that plush copper 201 is inserted in groove 101, increases plush copper 201, groove 101 and pole not less than the radius of plush copper 201 The contact area of ear 40, collector 30, and then improve the reliability of lug 40 and the welding of collector 30.

In order to the difference for better ensuring that the warp architecture of lug 40, the radius of groove 101 and the radius of plush copper 201 is lug 40 with the thickness sum that the thickness sum of collector 30, i.e. workpiece accommodating chamber size radially are lug 40 and collector 30. Due to manufacturing manufacturing tolerance, generally, the difference of the radius of groove 101 and the radius of plush copper 201 can be slightly larger than or less than lug 40 with the thickness sum of collector 30, typically using negative common difference, i.e. the difference of the radius of the radius of groove 101 and plush copper 201 is less than The thickness sum of lug 40 and collector 30, to ensure the extruding force of lug 40 and collector 30.

Groove 101 radius not less than plush copper 201 radius when, due to the depth of groove 101 it is too big, when groove 101 During with the extruding lug 40 of plush copper 201 with collector 30, collector 30 is easily extruded at the opening of groove 101, cause collector 30 Abrasion, in order to solve the above problems, the depth of groove 101 is not more than the thickness of lug 40, the thickness of collector 30 and plush copper 201 height sum.

When plush copper 201 is arc plush copper, the arc length of plush copper 201 is usually not less than the width of lug 40, width herein Refer to that lug 40 does not extrude the width before welding, the preferably greater than width of lug 40, with better ensure that lug 40 both sides it is curved Bent radian, prevents it from piercing through barrier film when winding.

When being in extruding for the opening for further preventing groove 101 to collector 30 cause damage, the inwall of groove 101 The soldering tip 10 being located with it or the outer wall of base 20 are connected by cambered surface, i.e. cambered surface transition at the opening of groove.

In the various embodiments described above, a kind of embodiment, plush copper 201 is located at base 20, and groove 101 is located at soldering tip 10, such as Fig. 1 institutes Show；Another kind of embodiment, plush copper 201 is located at soldering tip 10, and groove 101 is located at base 20.It is preferred that the latter is adopted, because soldering tip 10 leads to It is often movable part, base 20 is fixture, and plush copper 201 is located at into base 20, facilitates the placement of lug 40 and collector 30.

The application also provides a kind of battery core, as shown in figure 3, battery core includes lug 40 and collector 30, lug 40 and afflux Body 30 is formed by above-mentioned tab welding frock, and lug 40 has warp architecture.The lug 40 of this core strueture is difficult thorn Barrier film is worn, so as to ensure that the security of battery core.

Battery core also includes housing 50 and fluid sealant 60, and lug 40 stretches out housing 50, and housing 50 passes through fluid sealant with lug 40 60 sealings.Because lug 40 is after battery core is packaged into, the filling electrolyte in housing 50 is needed, can by increasing fluid sealant 60 Ensure the sealing of housing 50, be further ensured that the safety and reliability of battery core.

The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair Change, equivalent, improvement etc., should be included within the protection domain of the application.

Claims

1. in a kind of tab welding frock, it is characterised in that including soldering tip and base, the soldering tip and the base, one sets Fluted, another one is provided with plush copper, and the groove is relative with the plush copper, and forms workpiece accommodating chamber, the work therebetween Part accommodating chamber is used to accommodate lug and collector, and the groove is used to form the bending knot on the lug with the plush copper Structure.

2. tab welding frock according to claim 1, it is characterised in that the groove is arc groove, the plush copper It is inserted into the groove；

And/or

The plush copper is arc plush copper.

3. tab welding frock according to claim 2, it is characterised in that the radius of the groove is not less than the plush copper Radius.

4. tab welding frock according to claim 3, it is characterised in that the half of the radius of the groove and the plush copper The difference in footpath is the thickness sum of the lug and the collector.

5. tab welding frock according to claim 3, it is characterised in that the depth of the groove is not more than the lug Thickness, the thickness of the collector and the plush copper height sum.

6. tab welding frock according to claim 2, it is characterised in that the arc length of the plush copper is more than the lug Width.

7. the tab welding frock according to any one of claim 1-6, it is characterised in that the inwall of the groove and its institute The soldering tip or the base outer wall by cambered surface connect.

8. the tab welding frock according to any one of claim 1-6, it is characterised in that the plush copper is located at the bottom Seat, the groove is located at the soldering tip.

9. a kind of battery core, it is characterised in that the battery core includes lug and collector, and the lug is with the collector by power Profit requires that the tab welding frock described in any one of 1-8 is formed, and the lug has warp architecture.

10. battery core according to claim 9, it is characterised in that including housing and fluid sealant, the lug stretches out the shell Body, the housing passes through the sealant sealing with the lug.