CN217114690U - Connection structure of soft-packaged large-capacity battery cell and pole column - Google Patents

Abstract

The utility model provides a connection structure of soft-packaged large capacity battery electricity core and post belongs to energy storage battery technical field, and it includes soft-packaged electrical core and busbar, is provided with the through-hole on the busbar, and through-hole department is provided with the connecting plate, is connected with utmost point ear on the soft-packaged electrical core, and utmost point ear runs through-hole and the laminating of connecting plate on the busbar. The through holes are arranged on the bus bar, no hole is formed on the lug, and the internal resistance of the lug cannot be increased; simultaneously, the pole lugs are attached to the connecting plate, so that the connecting area of the pole lugs and the bus bar is increased, the flow area of the pole lugs and the bus bar is increased, and the cold joint can be effectively prevented.

Description

Connection structure of soft-packaged large-capacity battery cell and pole column

Technical Field

The utility model belongs to the technical field of energy storage battery, a connection technology of electricity core and utmost point post is related to, specifically is a connection structure of soft-packaged large capacity battery electricity core and utmost point post.

Background

The soft package battery cell is a battery formed by a hard shell battery, and the difference between the positive electrode, the negative electrode, the diaphragm, the electrolyte and the like of the soft package battery cell and the hard shell battery is not large, the biggest difference is that the soft package battery cell adopts an aluminum-plastic composite film as a shell, and a square hard battery and a cylindrical hard battery adopt metal materials as the shells. The soft package battery core has the advantages of good safety, light weight, high energy density, good electrochemical performance, long service life and the like, so the power soft package battery core is developing at an accelerated speed under the requirements of three cores of high energy density, high endurance mileage and high safety of new energy automobiles and power batteries, and a brand-new corner is exposed in the market of pure electric passenger vehicles. Simultaneously, along with the continuous enhancement of the layout of each large automobile brand in the aspect of pure electric automobiles, the future power soft package battery cell will meet greater development opportunities.

When a lug and a busbar on a traditional soft-package battery cell are connected, threaded holes need to be drilled in the lug and the busbar, then screws penetrate through the threaded holes in the lug and the threaded holes in the busbar, so that the lug is in threaded connection with a backflow bar, and then a heat-shrinkable tube is used for covering; the punching connection mode seriously destroys the overcurrent capacity of the lug on the battery cell and increases the internal resistance of the lug on the battery cell, so that the temperature of the battery cell is increased in a working state, and meanwhile, the lug is connected with the bus sheet through the screw for fastening, the operation is difficult and the lug on the battery cell is easy to damage; and the heat-shrinkable sleeve is used for cladding, so that the heat dissipation of the battery cell is seriously influenced.

For example, patent No. CN206210909U discloses a lithium ion soft package battery cell monomer connection cover pole and battery cell tab connection structure, which includes a battery cell connection cover, a soft package battery cell and foam, wherein an aluminum electrode is connected to the battery cell connection cover in an embedded manner, and the aluminum electrode is divided into a positive aluminum electrode and a negative aluminum electrode; the lower end of the battery monomer connecting cover is provided with a soft-packaged battery cell, and the upper end of the soft-packaged battery cell is provided with a battery cell tab; and the middle of the two soft-packaged battery cores is provided with a foam, and the foam is provided with a through hole. The through holes are formed in the pole lugs of each battery, and the punching of the pole lugs on the battery cell in the process can seriously damage the over-current capacity of the pole lugs on the battery cell and increase the internal resistance of the pole lugs on the battery cell.

SUMMERY OF THE UTILITY MODEL

To above-mentioned prior art on utmost point ear punch can seriously influence the ability of overflowing of electric core utmost point ear, increase the problem of utmost point ear internal resistance simultaneously, the utility model provides a connection structure of soft-packaged large capacity battery electricity core and utmost point post.

The utility model discloses a be provided with the through-hole on the busbar, set up the connecting plate above the through-hole of busbar fixedly simultaneously, through passing utmost point ear and connecting plate fixed connection after the through-hole, increased the area of being connected of utmost point ear and busbar, increased the flow area promptly, need not punch on utmost point ear simultaneously, can not influence the internal resistance of utmost point ear; the specific technical scheme is as follows:

the utility model provides a connection structure of soft-packaged large capacity battery cell and post, includes soft-packaged electrical core and busbar, be provided with the through-hole on the busbar, through-hole department is provided with the connecting plate, be connected with utmost point ear on the soft-packaged electrical core, utmost point ear runs through-hole and the laminating of connecting plate on the busbar.

The flexible package battery cell is further limited to be provided with a plurality of bus bars, and the bus bars are provided with a plurality of through holes in parallel;

the lugs on the soft-packaged battery cells are arranged in one-to-one correspondence with the through holes on the busbar;

or the lugs on the soft-packaged battery cells are connected to form a plurality of lug bundles, and the lug bundles are arranged in one-to-one correspondence with the through holes in the busbar.

Further limiting, the pole lugs on the soft-packaged battery cells are bonded through the conductive heat-conducting glue to form pole lug bundles.

Further, the through holes on the bus bars are rectangular through holes matched with the shapes of the lugs or the lug bundles.

Further limiting, a plurality of soft package battery cells are stacked in parallel to form a battery module, a fixing clamp plate is arranged on the outer side of the battery module, and the plurality of soft package battery cells are clamped and fixed through the fixing clamp plate; the fixed clamping plate and the soft package battery cell are arranged in parallel.

Further limit, the fixing clamping plates arranged at the opposite sides of the battery module are connected through screws.

Further, the electrode lug or the electrode lug bundle is welded with the connecting plate.

Further limiting, the connection structure of the soft-package high-capacity battery cell and the pole column further comprises a pole column, a plurality of grooves are formed in the pole column, and the number of the grooves is the same as that of the through holes; and the connecting plate is connected with the pole lugs or the pole lug bundles and then inserted into the grooves to connect the busbar with the pole.

Further limiting, the connecting plate is bonded with the groove wall of the groove through electric and heat conducting glue.

Further inject, the busbar passes through the clamp with utmost point post and fixes.

Further, the bus bar is welded with the pole.

Further inject, utmost point post is a plurality of metal blocks concatenation formation, and the concatenation department of two adjacent metal blocks forms the recess, and the concatenation department coating of two adjacent metal blocks has electrically conductive heat-conducting glue.

Further inject, be provided with heat dissipation mechanism on the utmost point post, heat dissipation mechanism is semiconductor refrigeration piece, radiating fin, radiator fan or heat dissipation heat pipe.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the utility model relates to a connection structure of soft-packaged large capacity battery electricity core and post, it includes soft-packaged electrical core and busbar, is provided with the through-hole on the busbar, is provided with the connecting plate in through-hole department, is connected with utmost point ear on soft-packaged electrical core, and utmost point ear runs through-hole and the laminating of connecting plate on the busbar. The through holes are arranged on the bus bar, no hole is formed on the lug, and the internal resistance of the lug cannot be increased; simultaneously, the pole lugs are attached to the connecting plate, so that the connecting area of the pole lugs and the bus bar is increased, the flow area of the pole lugs and the bus bar is increased, and the cold joint can be effectively prevented.

2. The soft package battery cell comprises a plurality of soft package battery cells, a bus bar is provided with a plurality of through holes, and tabs on the soft package battery cells are arranged in one-to-one correspondence with the through holes on the bus bar; or the utmost point ear on a plurality of soft-packaged electrical core is connected and is formed a plurality of utmost point ear bundles, and a plurality of utmost point ear bundles set up with the through-hole one-to-one on the busbar, set up like this and can ensure that the utmost point ear on each soft-packaged electrical core all is connected with the connecting plate, avoids appearing leaking even or virtual even.

3. The lugs on the soft package battery cores are bonded through the conductive heat-conducting adhesive to form a lug bundle; the conductive heat-conducting glue not only has the function of bonding a plurality of tabs, but also has the function of conducting heat generated by the soft-package battery cell to the busbar, so that the purpose of heat dissipation is achieved.

4. The through holes on the bus bar are rectangular through holes matched with the shapes of the lugs or the shapes of the lug bundles; can conveniently peg graft utmost point ear or utmost point ear bundle in the through-hole, make things convenient for utmost point ear or utmost point ear bundle and through-hole to cooperate.

5. The battery module is formed by stacking a plurality of soft package battery cells in parallel, and a fixing clamp plate is arranged on the outer side of the battery module; the fixed splint can play the effect of pressing from both sides tightly, fixing a plurality of soft-packaged electrical core, prevent to appear staggering each other between a plurality of soft-packaged electrical core.

6. The utility model discloses a connection structure of soft-packaged large capacity battery electricity core and utmost point post still includes utmost point post, is provided with the recess that corresponds with through-hole quantity and position on utmost point post, when connecting, in pegging graft into the recess after fixing with utmost point ear or utmost point ear bundle the connecting plate on the busbar, made things convenient for utmost point post and busbar to carry out fixed connection, also increased the connection area of busbar with utmost point post simultaneously, increased the flow area between busbar and the utmost point post promptly.

7. The connecting plate is adhered to the groove wall of the groove through the electric and heat conducting glue. The connection strength of the connecting plate and the groove is increased through the conductive heat-conducting adhesive, and meanwhile, the heat transfer efficiency of heat on the bus bar conducted to the pole column is also improved.

8. The busbar passes through the clamp with utmost point post and fixes, can make that busbar and utmost point post are connected more firm, prevents to take place the dislocation.

9. Be provided with heat dissipation mechanism on utmost point post, strengthened the radiating efficiency of utmost point post.

Drawings

Fig. 1 is a schematic structural diagram of a connection structure between a soft-package high-capacity battery cell and a pole column;

fig. 2 is a schematic connection diagram of a soft-package battery cell and a busbar;

fig. 3 is a schematic structural diagram of a tab bundle formed by tabs on a plurality of soft-packaged battery cells;

FIG. 4 is a schematic structural view of a through hole formed in one side of a busbar connecting plate;

FIG. 5 is a schematic view of the structure of the bus bar connecting plate with through holes on opposite sides;

FIG. 6 is a schematic structural view of a groove formed on a pole;

FIG. 7 is a schematic view of the structure of the clamp;

the flexible-package battery comprises a soft-package battery cell 1, a fixed clamping plate 2, a screw rod 3, a busbar 4, a connecting plate 41, a through hole 42, a pole 5, a pole 51, a groove 6, a pole lug 61 and a pole lug bundle.

Detailed Description

The technical solution of the present invention is further explained below with reference to the drawings and examples, but the present invention is not limited to the embodiments explained below.

The utility model relates to a connection structure of soft-packaged large capacity battery electricity core and post, a serial communication port, including soft-packaged electrical core 1 and busbar 4, be provided with through-hole 42 on the busbar 4, through-hole 42 department is provided with connecting plate 41, is connected with utmost point ear 6 on the soft-packaged electrical core 1, and utmost point ear 6 runs through-hole 42 and the laminating of connecting plate 41 on the busbar 4. A plurality of soft-package battery cores 1 are arranged, and a plurality of through holes 42 are arranged on the busbar 4 in parallel; the lugs 6 on the soft-package battery cells 1 are arranged in one-to-one correspondence with the through holes 42 on the busbar 4; or the lugs 6 on the soft package battery cores 1 are connected to form a plurality of lug bundles 61, and the lug bundles 61 are arranged in one-to-one correspondence with the through holes 42 on the bus bar 4. The tabs 6 on the soft package battery cells 1 are bonded by conductive heat-conducting glue to form tab bundles 61. The through holes 42 on the bus bar 4 are rectangular through holes matched with the shapes of the tabs 6 or the tab bundles 61. A plurality of laminate polymer core 1 piles up side by side and forms the battery module, and the outside of battery module sets up solid fixed splint 2, presss from both sides tightly, fixes a plurality of laminate polymer core 1 through solid fixed splint 2, gu fixed splint 2 sets up side by side with laminate polymer core 1. The fixing clamps 2 disposed at opposite sides of the battery module are coupled by screws 3. The tab 6 or the tab bundle 61 is welded to the connection plate 41. The connection structure of the soft-package high-capacity battery cell and the pole column further comprises a pole column 5, a plurality of grooves 51 are formed in the pole column 5, and the number of the grooves 51 is the same as that of the through holes 42; the connecting plate 41 is inserted into the groove 51 after being connected with the tab 6 or the tab bundle 61 to connect the busbar 4 with the pole 5. The connecting plate 41 is adhered to the groove wall of the groove 51 by an electrically and thermally conductive adhesive. The busbar 4 and the pole 5 are fixed by a clamp. The busbar 4 is welded to the pole 5. The pole 5 is formed by splicing a plurality of metal blocks, a groove 51 is formed at the splicing position of two adjacent metal blocks, and the splicing position of two adjacent metal blocks is coated with conductive heat-conducting glue. The pole 5 is provided with a heat dissipation mechanism which is a semiconductor refrigeration sheet, a heat dissipation fin, a heat dissipation fan or a heat dissipation heat pipe.

Example 1

Referring to fig. 1-2, this embodiment is a connection structure of soft-packaged large capacity battery electric core and post, it includes soft-packaged electric core 1 and busbar 4, busbar 4 divide into positive busbar and negative busbar, all be provided with through-hole 42 on positive busbar and the negative busbar, be provided with connecting plate 41 in through-hole 42 department, busbar 4 is the tabular structure of cross section for the rectangle, be connected with utmost point ear 6 on soft-packaged electric core 1, utmost point ear 6 divide into anodal utmost point ear and negative pole utmost point ear, anodal utmost point ear runs through the through-hole on the anodal busbar and laminates with connecting plate 41 on the anodal busbar, negative pole utmost point ear runs through the through-hole on the negative busbar and laminates with connecting plate 41 on the negative busbar.

Preferably, the through-hole 42 of the present embodiment is provided in the width direction of the bus bar 4.

Preferably, the connecting plate 41 of the present embodiment is disposed above the through hole 42, that is, the connecting plate 41 is disposed opposite to the soft packing cell 1 along the panel of the bus bar 4; preferably, the panel of the connection plate 41 is perpendicular to the panel of the busbar 4.

Example 2

The utility model provides a connection structure of soft-packaged large capacity battery electricity core and post, on embodiment 1's basis, its soft-packaged electrical core 1 has 50, and 50 soft-packaged electrical core 1 are two rows that set up side by side respectively, and every row 25, every row of correspondence set up a positive busbar and a negative busbar.

The positive lugs on the soft-package battery cell 1 are correspondingly connected with the through holes 42 on the corresponding positive bus bars one by one; the negative electrode lugs on the soft-package battery cell 1 are connected with the through holes 42 on the negative bus bar in a one-to-one correspondence manner.

Referring to fig. 3, or 5 soft-package battery cells 1 in each row are grouped into one group, a tab bundle 61 is formed by connecting positive tabs on the 5 soft-package battery cells 1 in the same group, and a tab bundle 61 is formed by connecting negative tabs on the 5 soft-package battery cells 1 in the same group, that is, the positive tab and the negative tab formed in each row form 5 tab bundles 61, and the tab bundles 61 formed by the positive tabs are connected with the through holes 42 on the positive busbar in a one-to-one correspondence manner; the tab bundles 61 formed by the negative tabs are connected with the through holes 42 on the negative bus bar in a one-to-one correspondence.

The positive electrode tab or the negative electrode tab on the soft package battery cell 1 in the same group of the embodiment is bonded by an adhesive, preferably, the positive electrode tab or the negative electrode tab is bonded by an electrically and thermally conductive adhesive.

It should be noted that the number of the flexible package cells in this embodiment may be 3, 5, 10, 15, 20, or even more, and the specific number thereof depends on different battery capacity requirements of the battery; the number of rows of the soft package battery core 1 can be 1 row, 2 rows, 3 rows or even more, and the specific number of rows is set according to the volume requirement of the battery; the number of positive or negative electrode tabs per tab bundle 61 may be 2, 3, 4, or even more.

Preferably, the through holes 42 of the busbar 4 of the present embodiment are rectangular through holes conforming to the shape of the tab 6 or the shape of the tab bundle 61.

Preferably, the positive tab and the positive bus bar of this embodiment are both made of aluminum, and the negative tab and the negative bus bar of this embodiment are both made of copper or nickel-plated copper.

Referring to fig. 4 and 5, through holes 42 are formed at one side or both sides of the connection plate 41, and if they are formed at both sides, the positive electrode tab or the negative electrode tab may penetrate from either side.

Preferably, the tab 6 or the tab bundle 61 of the present embodiment is welded to the connection plate 41.

Example 3

In the connection structure of the high-capacity soft-package battery cell and the pole column of the embodiment, on the basis of the embodiment 2, 30 soft-package battery cells 1 are stacked side by side to form a battery module, a fixing clamp plate 2 is arranged on the outer side of the battery module, and the 30 soft-package battery cells 1 are clamped and fixed through the fixing clamp plate 2; the fixed clamping plate 2 and the soft-package battery core 1 are arranged in parallel.

Preferably, in the present embodiment, 6 screws 3 are disposed between the two fixing clamping plates 2, and the 6 screws 3 are respectively disposed in two sets and respectively disposed on two opposite sides of the battery module.

The fixing splint 2 of the present embodiment may be one of a PP plate, a PE plate, a PVC plate, a PET plate, a PPs plate, a PPA plate, a PEEK plate, or an LCP plate; which can function as an insulator.

Example 4

Referring to fig. 6, the connection structure of a soft-package high-capacity battery cell and a pole column in this embodiment further includes a pole column 5 on the basis of embodiment 3, a groove 51 with the same number as that of the through holes 42 in the busbar 4 is formed in the pole column 5, and the connection plate 41 is connected to the tab 6 or the tab bundle 61 and then inserted into the groove 51 to connect the busbar 4 and the pole column 5.

Preferably, the connection plate 41 of the present embodiment is bonded to the tab 6 or the tab bundle 61 by an electrically and thermally conductive adhesive; further preferably, the connection plate 41 and the tab 6 or the tab bundle 61 are bonded by an electric and thermal conductive adhesive and then need to be welded.

The bus bar 4 and the pole 5 of the embodiment are fixed through a hoop; the clamp is arranged at the end part or the middle part of the joint of the bus bar 4 and the pole 5.

Referring to fig. 7, preferably, the clamp of this embodiment is composed of a clamp ring of a U-shaped structure and a baffle, wherein both ends of the clamp ring of the U-shaped structure are provided with threads, and a clamp ring hole is formed in the baffle.

Or preferably, the clamp of this embodiment is a rectangular ring structure, and when in use, the clamp is sleeved on the outer sides of the busbar 4 and the pole 5, and meanwhile, the joint of the clamp is tightened and fixed through the bolt.

Example 5

In the connection structure of the soft-package high-capacity battery cell and the pole column of the embodiment, on the basis of the embodiment 4, the pole column 5 is formed by splicing 5 metal blocks, a groove 51 is formed at the splicing position of two adjacent metal blocks, and an electrically conductive and thermally conductive adhesive is coated at the splicing position of two adjacent metal blocks; and two adjacent metal blocks are bonded by the conductive and heat-conductive adhesive.

In this embodiment, the heat dissipation mechanism is provided at one end or both ends of the pole. The heat dissipation mechanism is a semiconductor refrigeration sheet, a heat dissipation fin, a heat dissipation fan or a heat dissipation heat pipe. Preferably, the heat dissipation mechanism is a semiconductor refrigeration piece.

The foregoing is a further detailed description of the invention with reference to specific preferred embodiments and is not intended to limit the invention, to the extent that certain modifications or alterations may be made without departing from the spirit of the invention, any such modifications, equivalents, improvements, etc. as fall within the spirit and principles of the invention as defined by the appended claims.

Claims (13)

1. The utility model provides a connection structure of soft-packaged large capacity battery electricity core and post, a serial communication port, including soft-packaged electrical core and busbar, be provided with the through-hole on the busbar, through-hole department is provided with the connecting plate, be connected with utmost point ear on the soft-packaged electrical core, utmost point ear runs through-hole and the laminating of connecting plate on the busbar.

2. The connecting structure of the soft-package high-capacity battery cell and the pole column of claim 1, wherein a plurality of soft-package cells are arranged, and a plurality of through holes are arranged in parallel on the busbar;

the lugs on the soft-packaged battery cells are arranged in one-to-one correspondence with the through holes on the busbar;

or the lugs on the soft-packaged battery cells are connected to form a plurality of lug bundles, and the lug bundles are arranged in one-to-one correspondence with the through holes in the busbar.

3. The connection structure of the soft-package high-capacity battery cell and the pole column as claimed in claim 2, wherein the tabs on the plurality of soft-package cells are bonded by an electrically and thermally conductive adhesive to form a tab bundle.

4. The connecting structure of the soft-packaged high-capacity battery cell and the pole column of claim 3, wherein the through holes on the bus bar are rectangular through holes matched with the shape of the pole lugs or the shape of the pole lug bundles.

5. The connecting structure of the soft-package large-capacity battery cell and the pole column according to claim 4, wherein a plurality of soft-package cells are stacked side by side to form a battery module, a fixing clamp plate is arranged outside the battery module, and the plurality of soft-package cells are clamped and fixed through the fixing clamp plate; the fixed clamping plate and the soft package battery cell are arranged in parallel.

6. The connection structure of the soft-packaged high-capacity battery cell and the pole column as claimed in claim 5, wherein the fixing clamping plates arranged at opposite sides of the battery module are connected through screws.

7. The connection structure of the soft-packaged high-capacity battery cell and the pole column of claim 6, wherein the pole lug or the pole lug bundle is welded with a connection plate.

8. The connecting structure of the soft-package high-capacity battery cell and the pole column according to claim 7, wherein the connecting structure of the soft-package high-capacity battery cell and the pole column further comprises a pole column, a plurality of grooves are formed in the pole column, and the number of the grooves is the same as that of the through holes; and the connecting plate is connected with the pole lugs or the pole lug bundles and then inserted into the grooves to connect the busbar with the pole.

9. The connection structure of the soft-packaged high-capacity battery cell and the pole column of claim 8, wherein the connection plate is bonded with the groove wall of the groove through an electric and heat conducting adhesive.

10. The connection structure of soft-packaged high-capacity battery cell and pole column of claim 9, wherein the bus bar and the pole column are fixed through a hoop.

11. The connection structure of the soft-packaged high-capacity battery cell and the pole column of claim 10, wherein the bus bar is welded with the pole column.

12. The connecting structure of the soft-packaged high-capacity battery cell and the pole column of claim 11, wherein the pole column is formed by splicing a plurality of metal blocks, a groove is formed at the splicing position of two adjacent metal blocks, and an electrically conductive and thermally conductive adhesive is coated at the splicing position of two adjacent metal blocks.

13. The connection structure of the soft-packaged high-capacity battery cell and the pole column according to claim 12, wherein a heat dissipation mechanism is arranged on the pole column, and the heat dissipation mechanism is a semiconductor cooling plate, a heat dissipation fin, a heat dissipation fan or a heat dissipation heat pipe.

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