CN214754071U

CN214754071U - Group battery and supplementary tool of welding convenient to utmost point ear flexible support

Info

Publication number: CN214754071U
Application number: CN202120876329.XU
Authority: CN
Inventors: 吴家洪; 张军强; 王硕; 黄奎; 张国栋
Original assignee: Zhuhai Cosmx Power Co Ltd
Current assignee: Zhuhai Cosmx Power Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-11-16
Anticipated expiration: 2031-04-26

Abstract

The utility model discloses a battery pack and auxiliary welding jig convenient for flexibly supporting lugs, wherein the battery pack comprises at least one battery cell module arranged in a stacked manner, and the battery cell module comprises a plurality of battery cells arranged in a stacked manner; the battery cell module is characterized by further comprising an adapter plate and an adapter plate supporting piece, wherein the adapter plate supporting piece is fixedly arranged on at least one group of opposite two side surfaces of at least one battery cell group module, the end part of the adapter plate is fixedly connected to the adapter plate supporting piece, and a gap is formed between the adapter plate and a top sealing area of a battery cell; and the adapter plate is provided with a tab insertion hole corresponding to each tab of the battery cell group module. The utility model discloses the flexible supporting mechanism that well support piece and keysets constitute can carry out independent flexible support to every utmost point ear, because the keysets exists the interval with the top seal district of electric core in addition, the pressure head can exert the pressure in its elastic deformation scope to the keysets among the welding process, regulates and control its deformation and utmost point ear clearance, the welding of being convenient for. In addition, the welding auxiliary jig is convenient for fix a position flexible supporting mechanism to the battery cell pack module, and the assembly of the battery pack is convenient for providing convenience for the welding of the tabs.

Description

Group battery and supplementary tool of welding convenient to utmost point ear flexible support

Technical Field

The utility model belongs to the technical field of lithium ion battery, concretely relates to group battery and supplementary tool of welding convenient to utmost point ear flexible support.

Background

From the market development at home and abroad, the market share of the lithium ion battery pack is continuously promoted, and the market puts more and higher requirements on the battery pack structure. The pole ear welding of the existing lithium ion battery pack needs a stable supporting structure to obtain a high-quality welding effect, but the battery structure is difficult to effectively support the pole ear due to the limitation of space structures of some high-energy-density battery packs.

SUMMERY OF THE UTILITY MODEL

The utility model provides a group battery convenient to utmost point ear flexible support can realize the flexible support to utmost point ear, ensures welding quality and efficiency between each other of utmost point ear. The utility model discloses the first purpose is realized by following technical scheme:

a battery pack convenient for flexibly supporting a lug comprises at least one battery cell pack module which is arranged in an array mode, wherein the battery cell pack module comprises a plurality of battery cells which are arranged in a stacked mode; the battery cell module structure is characterized by further comprising an adapter plate and an adapter plate supporting piece, wherein the adapter plate supporting piece is fixedly arranged on at least one group of opposite two side surfaces of at least one battery cell group module, the end part of the adapter plate is fixedly connected to the adapter plate supporting piece, and a gap is formed between the adapter plate and a top sealing area of a battery cell; and the adapter plate is provided with a tab insertion hole corresponding to each tab of the battery cell group module.

Specifically, a 0.5-2mm interval is formed between the adapter plate and the top sealing area of the battery core.

Specifically, the adapter plate comprises a PCB positioned on an upper layer and an insulating plate positioned on a lower layer.

Specifically, the battery pack further comprises a tab connecting sheet, and a connecting sheet assembling hole for assembling the tab connecting sheet is further formed in the adapter plate.

Specifically, the battery pack further comprises a first total electrode and a second total electrode which are opposite in polarity.

Specifically, the foam layers are arranged between the main body parts of the stacked battery cells.

Specifically, support piece is two side shields, and two side shields paste respectively and locate the front and back both sides of the range upon range of direction of electric core group module, and the tip that two side shields are located utmost point ear side is higher than the top seal district of electric core, the both ends fixed connection of keysets is in the tip that utmost point ear side in two side shields.

Specifically, the at least one battery cell group module is two or more battery cell group modules arranged side by side, and the same side of each battery cell group module shares one side guard plate.

The utility model discloses the second purpose provides a welding auxiliary fixture, is directed against the structure of above-mentioned group battery specially, provides assistance-localization real-time for above-mentioned group battery. The utility model discloses the second purpose is realized by following technical scheme:

the welding auxiliary jig comprises a side surrounding assembly used for pressing the side protection plates on the side faces of the electric core group module, and a cover plate used for pressing the edges of the adapter plates on the side ends, located at the pole lug, of the two side protection plates.

Specifically, the side surrounding assembly comprises a three-side surrounding structure and an independent side pressure plate, the three-side surrounding structure is formed by pre-assembling a front side plate, a left side plate and a right side plate, the independent side pressure plate is detachably arranged at a side opening of the three-side surrounding structure, and a first locking mechanism is arranged between the independent side pressure plate and the three-side surrounding structure.

The beneficial effects of the utility model include: the flexible supporting mechanism that keysets support piece and keysets constitute can carry out independent flexible support to every utmost point ear on the one hand, and on the other hand, because the take-off section of keysets and electric core exists the interval, the pressure head can exert the pressure in its elastic deformation scope to the keysets among the welding process, regulates and control its deformation and utmost point ear clearance, the welding of being convenient for, this design specially adapted structure space is very limited group battery structure. Furthermore, the utility model provides a welding auxiliary jig is convenient for fix a position flexible supporting mechanism to electric core group module on, and the equipment of the group battery of being convenient for facilitates for the welding of utmost point ear simultaneously.

Drawings

Fig. 1 is a perspective view of each cell group module.

Fig. 2 is a perspective view of a battery pack according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a battery pack according to an embodiment of the present invention.

Fig. 4 is a perspective view of a transfer board in a battery pack according to an embodiment of the present invention.

Fig. 5 is a perspective view of the battery pack provided with tab connecting pieces and a main electrode according to an embodiment of the present invention.

Fig. 6 is an exploded view of the battery pack and the positioning auxiliary fixture according to the embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, wherein for the purpose of illustration, certain orientations may be defined, and these orientations are defined for the purpose of clearly describing the relative positions, and are not intended to limit the actual orientations of the devices during manufacture, use, sale, and the like. The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

example one

As shown in fig. 1, each of the two cell pack modules 10 includes a plurality of stacked cells 11, and the tabs 111 of each cell face the same plane for subsequent adaptive bending (bending is already performed in fig. 1) and series-parallel welding. In this embodiment, the foam layers 12 are disposed between the stacked cell main body portions, and are used to buffer the cell main body portions.

Referring to fig. 2 and 3, the battery pack provided in this embodiment includes at least one battery pack module 10, two side protection plates 21, and an adapter plate 22. Two side guard plates 21 are respectively attached to two sides of the cell stacking direction of the cell group module 10, the material of the side guard plates 21 is epoxy resin, the end parts of the two side guard plates 21 located on the polar ear side are higher than the top sealing area of the cell 11 (the top sealing area refers to the top sealing part for the polar ear to stretch out when the cell body is packaged), and the two ends of the adapter plate 22 are supported on the end parts of the two side guard plates 21 located on the polar ear side, so that an interval of 0.5-2mm is formed between the adapter plate 22 and the top sealing area of the cell 11. In this embodiment, the same side of at least one cell group module 10 shares one side guard plate 21.

As shown in fig. 2 and 3, the interposer 22 in the present embodiment includes a PCB 221 on an upper layer and an insulating plate 222 on a lower layer. As shown in fig. 4, the adaptor plate 22 is provided with tab insertion holes 220 corresponding to the tabs of the electric core assembly module, so that the tabs of the electric core assembly module 10 are inserted and extended out of the top of the adaptor plate 22, and the extended tab portions are used for bending and subsequent welding.

Referring to fig. 5, the battery pack provided in this embodiment further includes a tab connecting plate 228, and as shown in fig. 4, a connecting plate assembling hole 229 is further provided on the adapter plate 22 for assembling the tab connecting plate 228, where the tab connecting plate 228 is used to assist in realizing series connection or parallel connection (which is set according to actual application requirements) between the cell tabs. The battery pack provided by this embodiment further includes a first total electrode 227 and a second total electrode 226 with opposite polarities, and the first total electrode and the second total electrode are used to connect the total input and output ends of at least one battery module after the cells are connected in series or in parallel.

In the battery pack provided in the above embodiment, the flexible support mechanism formed by the side guard plate 21 and the adapter plate 22 can independently and flexibly support each tab, and on the other hand, because there is a gap between the adapter plate 22 and the top seal region of the battery cell 11, the pressure head can apply pressure in the elastic deformation range to the adapter plate 22 during the welding process, so as to regulate and control the deformation and the tab gap.

Referring to fig. 6, in the present embodiment, a positioning auxiliary fixture for positioning the side guard plate 21 and the adapter plate 22 on the cell stack module is further provided, so as to perform tab welding. The auxiliary positioning jig comprises a side surrounding component 51 for pressing the side protection plates 21 on the side surfaces of the electric core group module, and a cover plate 52 for pressing the edges of the adapter plate 22 on the side ends of the two side protection plates 21 at the pole ear. Specifically, the side surrounding assembly 51 includes a three-sided surrounding structure 511 and an independent side panel 512, the three-sided surrounding structure 511 is formed by pre-assembling a front side panel 5111, a left side panel 5112 and a right side panel 5113, the independent side panel 512 is detachably disposed at a side opening of the three-sided surrounding structure 511, and a latch mechanism 519 is disposed between the independent side panel 512 and the three-sided surrounding structure 511. The cover plate 52 is detachably fitted to the upper opening of the side surrounding assembly 51, the cover plate 52 is provided with a window 521 for exposing each tab of the electric core module, and a locking mechanism 529 is disposed between the cover plate 52 and the side surrounding assembly 51.

The assembling process of the battery pack that this embodiment provided to and the process of auxiliary positioning before welding is carried out the battery pack through the supplementary tool in location as follows:

1) stacking cells to form at least one cell stack module as shown in fig. 1;

2) side guard plates 21 are attached to two sides of the electric core group module;

3) putting the product in the step 2 into a three-side surrounding structure 511, and compacting the product through an independent side pressure plate 512; the side guard plate is ensured not to change position when being stressed;

4) the adapter plate 22 and the battery core lug are assembled in an inserting mode, after assembly is finished, the edge of the adapter plate 22 is supported by the top of the side protection plate 21, and at least 1mm of gap is formed between the adapter plate 22 and a battery core top sealing area to form flexible support for the battery core lug;

5) bending corresponding tabs according to serial-parallel requirements;

6) installing a cover plate 52 above the adapter plate 22 to press the edge position of the adapter plate 22; the pressure head can apply pressure within its elastic deformation range to the tab 22 during welding to regulate its deformation and tab gap.

The above embodiments are only for sufficient disclosure and not limitation, and all the replacements based on the inventive idea, equivalent technical features that can be obtained without creative work should be regarded as the scope of the present invention.

Claims

1. A battery pack convenient for flexibly supporting a lug comprises at least one battery cell pack module which is arranged in an array mode, wherein the battery cell pack module comprises a plurality of battery cells which are arranged in a stacked mode; the battery cell module structure is characterized by further comprising an adapter plate and an adapter plate supporting piece, wherein the adapter plate supporting piece is fixedly arranged on at least one group of opposite two side surfaces of at least one battery cell group module, the end part of the adapter plate is fixedly connected to the adapter plate supporting piece, and a gap is formed between the adapter plate and a top sealing area of a battery cell; and the adapter plate is provided with a tab insertion hole corresponding to each tab of the battery cell group module.

2. The battery pack of claim 1, wherein the interposer is spaced from the top sealing region of the cell by 0.5-2 mm.

3. The battery pack of claim 1, wherein the interposer comprises a PCB board at an upper layer and an insulating board at a lower layer.

4. The battery pack according to claim 1, further comprising a tab connecting plate, wherein the adapter plate is further provided with a connecting plate assembling hole for assembling the tab connecting plate.

5. The battery of claim 4, further comprising first and second common electrodes of opposite polarity.

6. The battery pack of claim 1, wherein the body portions of the stacked cells are provided with a foam layer therebetween.

7. The battery pack according to any one of claims 1 to 6, wherein the adapter plate support member is two side guard plates, the two side guard plates are respectively attached to the front side and the rear side of the cell stacking direction of the cell pack module, the end portions of the two side guard plates on the polar ear side are higher than the top sealing area of the cell, and the two ends of the adapter plate are fixedly connected to the end portions of the two side guard plates on the polar ear side.

8. The battery pack of claim 7, wherein the at least one battery module is two or more battery modules arranged side-by-side, and each battery module shares a side guard plate on the same side.

9. A welding auxiliary jig, which comprises a side surrounding component for pressing the side guard plate of claim 7 or 8 on the side of the electric core group module, and a cover plate for pressing the edge of the adapter plate of claim 7 or 8 on the end part of the side guard plate; and the cover plate is provided with a window for exposing each electrode lug of the electric core group module.

10. The welding auxiliary fixture of claim 9, wherein the side enclosure assembly comprises a three-sided enclosure structure and an independent side panel, the three-sided enclosure structure is formed by pre-assembling a front panel, a left panel and a right panel, the independent side panel is detachably disposed at a lateral opening of the three-sided enclosure structure, and the independent side panel and the three-sided enclosure structure are disposed with a first locking mechanism therebetween.