CN219067037U

CN219067037U - Battery pack buffering protection frame

Info

Publication number: CN219067037U
Application number: CN202223534949.9U
Authority: CN
Inventors: 李锐辉
Original assignee: Zhangzhou Huafu New Energy Technology Co ltd
Current assignee: Zhangzhou Huafu New Energy Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-23
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a battery pack buffering protection frame which comprises an open-shaped fixed shell, wherein partition plates which are distributed at equal intervals are arranged in the fixed shell, a cover plate is fixed at the top end of the fixed shell through bolts, electric cores are arranged between two adjacent partition plates, each partition plate comprises a fixed frame, the front surface and the back surface of each fixed frame are welded with an outer side plate, the inner frame wall of each outer side plate is welded with an inner side plate, nylon strips which are distributed at equal intervals are arranged on the inner side plates, the electric cores are provided with lower lugs, the lower lugs are connected with upper lugs through connecting pieces, grooves for inserting the connecting pieces are formed in the vertical upward direction of the bottom surfaces of the cover plates, through grooves for penetrating the upper lugs are formed in the wall bodies of the cover plates at the top ends of the grooves, and the through grooves are communicated with the grooves. The battery pack buffering protection frame can buffer the expansion of the battery cell and limit the expansion of the battery cell through the nylon strip, so that the internal structure of the battery pack is prevented from being damaged due to the expansion of the battery cell, and the overall protection effect is improved.

Description

Battery pack buffering protection frame

Technical Field

The utility model relates to the technical field of battery frames, in particular to a battery pack buffering protection frame.

Background

The ternary lithium ion battery pack is formed by assembling a plurality of battery cells, and the thickness of the battery cells expands and contracts to a certain extent along with the continuous intercalation and deintercalation of lithium ions in the charging and discharging process of the ternary lithium ion battery cells, so as to avoid the damage of the expansion to the whole battery pack frame, the prior art (CN 207818687U) discloses a battery pack mounting frame which clamps a battery by using a telescopic rod and a buffer pad, and simultaneously enables the expansion of the battery to be automatically absorbed by an adjacent buffer pad, thereby relieving the influence caused by the change of the fastening force inside the frame due to the expansion of the battery cells, but the battery pack mounting frame has the defects;

because the battery is located the standing groove, and the blotter forms the active structure through the telescopic link in the dashpot, the battery is not in fixed state in the standing groove like this, when the group battery frame takes place to rock under the exogenic action, the battery can take place to rock in the standing groove, and be the welding between the utmost point ear of battery and the busbar, the battery rocks the back, easily lead to taking place not hard up even the fracture between utmost point ear and the busbar, be unfavorable for the steady operation and the security of group battery, the practicality is not strong, can not satisfy people's user demand, in view of the defect that exists among the above prior art, it is necessary to further improve it, make it possess the practicality more, just can accord with the in-service use condition.

Disclosure of Invention

The present utility model is directed to a battery pack buffer protection frame, which solves the above-mentioned problems of the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the battery pack buffering protection frame comprises an open-shaped fixed shell, wherein partition plates which are distributed at equal intervals are arranged in the fixed shell, a cover plate is fixed at the top end of the fixed shell through bolts, a battery cell is arranged between two adjacent partition plates, each partition plate comprises a fixed frame, the front face and the back face of each fixed frame are welded with an outer side plate, the inner frame wall of each outer side plate is welded with an inner side plate, and nylon strips which are distributed at equal intervals are arranged on the inner side plates;

the battery cell is provided with a lower electrode lug which is connected with an upper electrode lug through a connecting sheet;

the cover plate bottom surface extends vertically upwards to form a groove for connecting sheet insertion, the cover plate wall body at the top end of the groove is provided with a through groove for penetrating the upper lug, and the through groove is communicated with the groove.

Further, the lower tab, the connecting sheet and the upper tab are integrally formed, and the connecting sheet is wavy.

Further, the cross section of the groove is rectangular, and the cross section side length of the groove is longer than the cross section side length of the through groove.

Furthermore, the outer side plate and the inner side plate are rectangular frame-shaped, and the inner side plate and the outer side plate are bent.

Further, the inner walls at two sides of the fixed frame extend outwards horizontally to form convex blocks which are distributed at equal intervals;

the inner side plate is provided with a strip-shaped through hole for the penetration of the nylon strip, and two ends of the nylon strip are fixedly bonded with the convex blocks through elastic springs.

Further, the nylon strip surface is flush with the outer side plate surface, and the outer side plate is attached to the surface of the battery cell.

Compared with the prior art, the utility model has the beneficial effects that: the battery pack buffering protection frame is provided with a plurality of clapboards, the battery cells are positioned between the two clapboards, the clapboards are composed of the fixed frame, the outer side plate and the inner side plate, when the battery cells are expanded, the expanded parts of the battery cells extend into the inner frame of the inner side plate and squeeze the nylon strips, and the expansion of the battery cells can be buffered and limited through the nylon strips, so that the internal structure of the battery pack is prevented from being damaged due to the expansion of the battery cells, and the integral protection effect is improved;

meanwhile, when the frame shakes under the action of external force, the lug of the battery cell is divided into the lower lug, the connecting sheet and the upper lug, and the middle buffer structure is adopted by the connecting sheet, so that when the battery cell slightly displaces, the lower lug can not drive the upper lug to move, the whole lug and the bus bar are firmly welded, the lug can not be damaged, the running stability and the safety of the battery pack are ensured, and the practicability is strong.

Drawings

FIG. 1 is a schematic view of the internal longitudinal section of the present utility model;

FIG. 2 is a schematic view of the bottom structure of the cover plate of the present utility model;

FIG. 3 is a schematic top cross-sectional view of the retaining frame, outer side panels and inner side panels of the present utility model;

FIG. 4 is a schematic view of the outer and inner side panels of the present utility model;

fig. 5 is a schematic diagram of a cell structure according to the present utility model.

In the figure: 1. a fixed case; 2. a cover plate; 21. a groove; 22. a through groove; 3. a partition plate; 31. a fixed frame; 32. an outer panel; 33. an inner side plate; 34. a nylon strip; 35. a bump; 36. an elastic spring; 4. a battery cell; 41. a lower tab; 42. a connecting sheet; 43. and an upper tab.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution: the battery pack buffering protection frame comprises an open-shaped fixed shell 1, wherein partition plates 3 which are distributed at equal intervals are arranged in the fixed shell 1, a cover plate 2 is fixed at the top end of the fixed shell 1 through bolts, and a battery cell 4 is arranged between two adjacent partition plates 3, so that a plurality of battery cells 4 can be placed in the fixed shell 1 through the partition plates 3, and a battery pack is formed;

the battery cell 4 is provided with a lower tab 41, the lower tab 41 is connected with an upper tab 43 through a connecting sheet 42, the bottom surface of the cover plate 2 is vertically and upwards extended to form a groove 21 for inserting the connecting sheet 42, the wall body of the cover plate 2 at the top end of the groove 21 is provided with a through groove 22 for penetrating the upper tab 43, the through groove 22 is communicated with the groove 21, when the cover plate 2 is fixed, the upper tab 43 can penetrate through the through groove 22, the lower tab 41 and the connecting sheet 42 can extend into the groove 21, and thus the through groove 22 is matched with the groove 21, not only the upper tab 43 is convenient to weld with a busbar, but also the lower tab 41, the connecting sheet 42 and the upper tab 43 can be protected, and damage to the three is avoided;

the lower lug 41, the connecting sheet 42 and the upper lug 43 are integrally formed, the connecting sheet 42 is wavy, the cross section of the groove 21 is rectangular, the cross section side of the groove 21 is longer than the cross section side of the through groove 22, the connecting sheet 42 is structurally designed to form a telescopic structure, the lower lug 41 can be stretched and contracted in a certain range, the lower lug 41 and the upper lug 43 form flexible connection, the groove 21 is designed to be large in size, the inner space of the lower lug 41 and the connecting sheet 42 can be displaced in the lower lug, therefore, when the fixing shell 1 is subjected to shaking, the battery core 4 can displace along with the occurrence of displacement, and then the lower lug 41 stretches the connecting sheet 42 when moving along with the battery core 4, the upper lug 43 cannot be pulled, stable connection of the upper lug 43 and a busbar is ensured, and meanwhile, the lower lug 41 or the upper lug 43 is prevented from being damaged, and stable running of the battery pack is facilitated.

The partition plate 3 comprises a fixed frame 31, the front and the back of the fixed frame 31 are welded and connected with an outer side plate 32, the inner frame wall of the outer side plate 32 is welded and connected with an inner side plate 33, nylon strips 34 distributed at equal intervals are arranged on the inner side plate 33, the surfaces of the nylon strips 34 are flush with the surfaces of the outer side plate 32, the outer side plate 32 is attached to the surfaces of the battery cells 4, two sides of the battery cells 4 can be attached to the nylon strips 34, after the battery cells 4 are expanded, the expanded parts of the battery cells 4 can squeeze the nylon strips 34, and further the expansion can be buffered and limited to continue to be expanded through the nylon strips 34, so that the influence on the integral structure and the operation stability due to the expansion of the battery cells 4 is avoided;

the outer side plate 32 and the inner side plate 33 are rectangular frame shapes, the inner side plate 33 and the outer side plate 32 are bent, and the outer side plate 32 and the inner side plate 33 are structurally designed, so that after the battery cell 4 is expanded, the expanded part of the battery cell 4 can extend into the inner frame of the inner side plate 33, and further, the nylon strip 34 can buffer expansion of the battery cell 4 in the expansion process;

and the inner side plate 33 and the outer side plate 32 are formed with a certain gradient, so that after the battery cell 4 expands, the inner side plate 33 can support the periphery of the expansion part of the battery cell 4, and the effect of limiting expansion can be further improved by matching with the nylon strip 34.

The inner walls of the two sides of the fixed frame 31 horizontally extend outwards to form the convex blocks 35 which are distributed at equal intervals, the inner side plate 33 is provided with strip-shaped through holes for the penetration of the nylon strips 34, the two ends of the nylon strips 34 are fixedly bonded with the convex blocks 35 through the elastic springs 36, the nylon strips 34 can move on the inner side plate 33 through the through holes, and the two ends of the nylon strips 34 can form an elastic movable structure through the elastic springs 36, so that the elastic springs 36 can be stretched under the extrusion of the expanded battery cells 4, the expansion can be buffered through the elasticity of the elastic springs 36, the continuous expansion can be limited, and the structure is reasonable.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a group battery buffering protection frame, includes uncovered form fixed casing (1), and fixed casing (1) inside is provided with baffle (3) that are equidistant distribution, and fixed casing (1) top bolt fastening has apron (2), is provided with electric core (4) between two adjacent baffles (3), its characterized in that: the partition plate (3) comprises a fixed frame (31), wherein the front surface and the back surface of the fixed frame (31) are welded with an outer side plate (32), the inner frame wall of the outer side plate (32) is welded with an inner side plate (33), and nylon strips (34) distributed at equal intervals are arranged on the inner side plate (33);

the battery cell (4) is provided with a lower tab (41), and the lower tab (41) is connected with an upper tab (43) through a connecting sheet (42);

the bottom surface of the cover plate (2) vertically extends upwards to form a groove (21) for inserting the connecting sheet (42), a through groove (22) for penetrating the upper lug (43) is formed in the wall body of the cover plate (2) at the top end of the groove (21), and the through groove (22) is communicated with the groove (21).

2. The battery pack cushioning guard frame of claim 1, wherein: the lower lug (41), the connecting sheet (42) and the upper lug (43) are integrally formed, and the connecting sheet (42) is wavy.

3. The battery pack cushioning guard frame of claim 2, wherein: the cross section of the groove (21) is rectangular, and the cross section side length of the groove (21) is longer than that of the through groove (22).

4. The battery pack cushioning guard frame of claim 1, wherein: the outer side plate (32) and the inner side plate (33) are rectangular frames, and the inner side plate (33) and the outer side plate (32) are bent.

5. The battery buffer protection frame of claim 4, wherein: the inner walls at two sides of the fixed frame (31) horizontally extend outwards to form convex blocks (35) which are distributed at equal intervals;

the inner side plate (33) is provided with a strip-shaped through hole for penetrating the nylon strip (34), and two ends of the nylon strip (34) are fixedly bonded with the convex blocks (35) through elastic springs (36).

6. The battery buffer protection frame of claim 5, wherein: the surface of the nylon strip (34) is flush with the surface of the outer side plate (32), and the outer side plate (32) is attached to the surface of the battery cell (4).