CN212848722U

CN212848722U - Connecting device for soft-packaged cell tab

Info

Publication number: CN212848722U
Application number: CN202021767338.7U
Authority: CN
Inventors: 魏维刚; 李晓冬; 吕游; 兰晓岱
Original assignee: Shanxi Dayun Mengguli New Energy Technology Co ltd
Current assignee: Shanxi Dayun Mengguli New Energy Technology Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-03-30
Anticipated expiration: 2030-08-21

Abstract

The utility model relates to an electric automobile goes up power battery's auxiliary device specifically is the connecting device of soft-packaged electrical core utmost point ear. Thereby need reserve the problem that a large amount of installation space have reduced battery system's specific energy in the battery box when assembling into whole case battery by becoming little module for solving laminate polymer battery core, provide a neotype laminate polymer battery core utmost point ear's connecting device. Including the solid fixed square body, the compact heap, the wedge, the upper surface of the solid fixed square body is equipped with a rectangle and leads to the groove, the bottom surface that the rectangle leads to the groove is opened there is a screw, compact heap and wedge are placed at the logical inslot of rectangle in proper order, the compact heap is an inclined plane with the contact surface of wedge, the inclined plane becomes the obtuse angle with the lower bottom surface of wedge, it has a through-hole to open on the wedge, the bolt passes the through-hole and twists in the screw, promote the compact heap through the wedge inclined plane, make soft-packaged electrical core utmost point ear tightly the centre gripping between one side cell wall that compact heap and rectangle lead to the groove. The novel soft-packaged battery cell connecting device has good market economic benefits.

Description

Connecting device for soft-packaged cell tab

Technical Field

The utility model relates to an electric automobile goes up power battery's auxiliary device specifically is the connecting device of soft-packaged electrical core utmost point ear.

Background

At present, the assembly process of a battery box of a power battery system is mostly to assemble soft-packaged battery cores into a certain number of small modules and then assemble the small modules into the battery box; in the small module design and production link, required parts and production processes are extremely complex in order to meet the universality and consistency among modules. Simultaneously, become the in-process of whole case battery by little module assembly, need weld or use bolted connection between each module and the battery box, and still need adopt parts such as casing fixed, consequently, for satisfying the connection of laminate polymer core utmost point ear, become the in-process of whole case battery at little module assembly, need reserve the activity space of a large amount of installation space in order to satisfy fastening spanner or welding tool etc. in the battery box, thereby taken up the inside space of battery box, the specific energy of battery system has been reduced.

Disclosure of Invention

The utility model discloses a when solving among the prior art laminate polymer core and assembling into whole case battery by little module, thereby need reserve the problem that a large amount of installation space have reduced battery system's specific energy in the battery box, provide a novel connecting device of laminate polymer core utmost point ear.

The utility model discloses an adopt following technical scheme to realize: connecting device of soft-packaged electrical core utmost point ear, including the fixed square body, the compact heap, the wedge, the upper surface of the fixed square body is equipped with a rectangle and leads to the groove, the bottom surface that the rectangle led to the groove is opened there is a screw, compact heap and wedge are placed in proper order at the logical inslot of rectangle, be used for pressing soft-packaged electrical core utmost point ear between one side cell wall that compact heap and rectangle lead to the groove, the compact heap is an inclined plane with the contact surface of wedge, the inclined plane becomes the obtuse angle with the lower bottom surface of wedge, it has a through-hole to open on the wedge, the bolt passes the through-hole and twists in the screw, promote the compact heap through the wedge inclined plane, make soft-packaged electrical core utmost point ear tightly by the centre gripping between.

When the flexible-package battery cell is required to be connected in series, the positive electrode of the tab of the flexible-package battery cell and the negative electrode of the tab of the other flexible-package battery cell are simultaneously inserted between the left cell wall of the rectangular through groove and the compression block; when the soft-package battery cells are required to be connected in parallel, the positive electrode of the lug of one soft-package battery cell and the positive electrode of the lug of the other soft-package battery cell are simultaneously inserted between the left side groove wall of the rectangular through groove and the pressing block; and finally, locking the bolt, wherein the bolt penetrates through the through hole to be screwed in the screw hole, and pushing the pressing block through the wedge-shaped block inclined plane, so that the soft-package battery cell lug is tightly clamped between the groove wall on one side of the rectangular through groove and the pressing block, and the series-parallel connection of the soft-package battery cell lug is realized.

Further, the longitudinal section of the wedge-shaped block is a right-angle trapezoid. Such structure makes when the bolt on the wedge is locked, and soft-packaged battery core utmost point ear is pressed from both sides tighter, connects more stably between the utmost point ear.

The utility model discloses produced beneficial effect as follows: the connecting device of the soft-package battery cell tab solves the problem that a large amount of installation space needs to be reserved in the battery box body when the soft-package battery cell tab is assembled into a whole battery box by a small module group through the wedge-shaped extrusion structure in the device, thereby reducing the specific energy of a battery system, meanwhile, the assembly parts and the process are reduced, the assembly cost is reduced, and under the condition of meeting various performance requirements, not only ensures that the connection of the lug of the soft-packaged battery cell is more stable, but also is convenient for replacing the battery cell in the later period, the maintenance has the advantages that all components can be replaced in real time, the maintenance cost of the whole battery box is reduced, and the characteristic that the soft-package battery cell lug is thin and long is met, the process requirements of multi-layer lug and overlapping compression are met, and the adopted novel soft-package battery cell lug connecting device has good market economic benefits.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the compact;

FIG. 3 is a left side view of FIG. 2;

fig. 4 is a top view of fig. 2.

In the figure: 1-fixed square body, 2-compact heap, 3-wedge, 4-rectangle logical grooves, 5-spacing sand grip, 6-screw, 7-through-holes, 8-bolt, 9-elasticity boss, 10-recess, 11-soft package electricity core utmost point ear, 12-countersunk head through-holes.

Detailed Description

Referring to fig. 1 to 4, connecting device of soft-packaged electrical core utmost point ear, including fixed square 1, compact heap 2, wedge 3, the upper surface of fixed square 1 is equipped with a rectangle and leads to groove 4, the bottom surface that the rectangle leads to groove 4 is opened there is a screw 6, compact heap 2 and wedge 3 are placed in the logical groove 4 of rectangle in proper order, compact heap 2 and rectangle are used for pressing soft-packaged electrical core utmost point ear 11 between the one side cell wall that leads to groove 4, compact heap 2 is an inclined plane with wedge 3's contact surface, the inclined plane becomes the obtuse angle with wedge 3's lower bottom surface, wedge 3 is last to be opened there is a through-hole 7, bolt 8 passes through-hole 7 and twists in screw 6, promote compact heap 2 through wedge 3 inclined plane, make soft-packaged electrical core utmost point ear 11 tightly by the centre gripping between compact heap 2 and the logical one side cell wall of groove 4 of rectangle.

In specific implementation, the longitudinal section of the wedge-shaped block 3 is a right-angle trapezoid. Such structure makes when the bolt on the wedge is locked, and soft-packaged battery core utmost point ear is pressed from both sides tighter, connects more stably between the utmost point ear.

The longitudinal section of the pressing block 2 is a right-angle trapezoid. The structure enables the compacted effect of the soft-package cell tab 11 to be better.

Both sides around the inclined plane of compact heap 2 are equipped with respectively along the edge around the inclined plane of compact heap 2 from last to down and the direction on perpendicular to inclined plane extends and has spacing sand grip 5, between two spacing sand grips 5 of wedge 3 embedding, play the effect of direction to wedge 3's embedding, avoid wedge 3 off tracking when the embedding for soft-packaged electrical core utmost point ear 11 is tighter by the compaction.

The limiting convex strips 5 at the two ends of the pressing block 2 are symmetrically distributed on the two sides of the central line of the inclined plane of the pressing block 2. The structure enables the pressing block 2 to be evenly pushed by the inclined plane of the wedge-shaped block 3, and the soft-package battery cell pole lug 11 is compacted more tightly.

The side that is close to the cell wall that the rectangle leads to groove 4 of compact heap 2 is equipped with elasticity boss 9 on, and the rectangle leads to be equipped with on one side cell wall that is close to compact heap 2 of groove 4 and is used for compressing tightly soft-packaged electric core utmost point ear 11 matched with recess 10 with elasticity boss 9, makes soft-packaged electric core utmost point ear 11 surface produce the indent deformation. At this moment, the surface of the soft-package battery cell tab 11 can be inwards concave and deformed, the compaction effect of the soft-package battery cell tab 11 is increased, the conductive safety is ensured, the inwards concave deformation on the soft-package battery cell tab 11 can increase the positioning and locking capacity between the soft-package battery cell tabs 11, the displacement between the soft-package battery cell tabs 11 is ensured, and the loosening of the connection of the soft-package battery cell tabs 11 due to the vibration of a battery box is avoided.

The cross section of the elastic boss 9 is oblong. Such structure has increased soft-packaged electrical core utmost point ear 11's compaction effect, has further ensured electrically conductive safety, also avoids the edge to be sharp simultaneously and causes the damage to soft-packaged electrical core utmost point ear 11.

The elastic bosses 9 are four and distributed in two rows and two columns, and the distance between every two adjacent elastic bosses 9 is not less than 5 mm. Such structure makes soft-packaged electrical core utmost point ear 11 better by the effect of compaction, has further ensured electrically conductive safety.

In this embodiment, two sides of the rectangular through groove 4 on the upper surface of the fixed square body 1 are symmetrically provided with a countersunk through hole 12, so as to be conveniently connected and fixed with the inner bottom of the battery box.

The edges of the recess 10 are rounded. Avoid the edge sharpness to cause the damage to soft-packaged electrical core utmost point ear 11.

Claims

1. The connecting device for the soft-package battery cell lug is characterized by comprising a fixed square body (1), a pressing block (2) and a wedge block (3), wherein a rectangular through groove (4) is formed in the upper surface of the fixed square body (1), a screw hole (6) is formed in the bottom surface of the rectangular through groove (4), the pressing block (2) and the wedge block (3) are sequentially placed in the rectangular through groove (4), a soft-package battery cell lug (11) is pressed between the pressing block (2) and one side groove wall of the rectangular through groove (4), the contact surface between the pressing block (2) and the wedge block (3) is an inclined surface, the inclined surface and the lower bottom surface of the wedge block (3) form an obtuse angle, a through hole (7) is formed in the wedge block (3), and a bolt (8) penetrates through the through hole (7) and is screwed in the screw hole (6), the pressing block (2) is pushed through the inclined plane of the wedge-shaped block (3), so that the lug (11) of the soft-package battery cell is tightly clamped between the pressing block (2) and the groove wall on one side of the rectangular through groove (4).

2. The connecting device of the soft package battery cell tab according to claim 1, characterized in that the longitudinal section of the wedge-shaped block (3) is a right-angle trapezoid.

3. The connecting device for the soft-package cell tab according to claim 1 or 2, characterized in that the longitudinal section of the compression block (2) is a right-angled trapezoid.

4. The connecting device of the soft package battery cell tab according to claim 3, wherein the front and back sides of the inclined plane of the pressing block (2) are respectively provided with a limiting protruding strip (5) extending along the front and back edges of the inclined plane of the pressing block (2) from top to bottom and perpendicular to the direction of the inclined plane, and the wedge-shaped block (3) is embedded between the two limiting protruding strips (5).

5. The connecting device of the soft-package cell tab according to claim 4, wherein the limiting convex strips (5) at the two ends of the pressing block (2) are symmetrically distributed on the two sides of the center line of the inclined plane of the pressing block (2).

6. The connecting device of the soft-package battery cell tab according to claim 5, wherein an elastic boss (9) is arranged on one side surface of the pressing block (2) close to the groove wall of the rectangular through groove (4), and a groove (10) used for pressing the soft-package battery cell tab (11) with the elastic boss (9) is arranged on one side groove wall of the rectangular through groove (4) close to the pressing block (2), so that the surface of the soft-package battery cell tab (11) is deformed inwards.

7. The connecting device for the soft-package cell tab according to claim 6, characterized in that the cross section of the elastic boss (9) is oblong.

8. The connecting device of the soft package battery cell tab according to claim 7, wherein the elastic bosses (9) are four and distributed in two rows and two columns, and the distance between the adjacent elastic bosses (9) is not less than 5 mm.

9. The connecting device for the soft package battery cell tab according to claim 8, wherein two sides of the rectangular through groove (4) on the upper surface of the fixed square body (1) are symmetrically provided with a countersunk through hole (12) respectively.

10. The connecting device for soft-package cell tabs according to claim 9, characterized in that the edges of the recesses (10) are rounded.