CN219086154U

CN219086154U - Battery pack structure

Info

Publication number: CN219086154U
Application number: CN202222695056.6U
Authority: CN
Inventors: 刘建明; 海滨; 王磊; 陆发燕; 叶光保; 胡张飞; 李俊; 贺云飞
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-05-26
Anticipated expiration: 2032-10-13

Abstract

The utility model provides a battery pack structure, wherein a battery shell is box-shaped and is formed by a bottom plate and side plates surrounding the periphery of the bottom plate, a cover plate is covered at a box opening, battery cells are arranged in a cavity formed by the battery shell and the cover plate, cross beams and longitudinal beams are arranged on the bottom plate of the battery shell in a staggered manner, the lower edge surface of an end plate arranged at the side surface of each battery cell is lapped on the cross beams or the longitudinal beams, and the upper edge surface of the end plate is higher than the height of a battery cell module beside. The cover plate is stressed and deformed, and external force is transmitted to the cross beam or the longitudinal beam through the end plate, so that the battery shell is taken as a whole to bear load, the bearing capacity of the battery pack is improved, and the situation that the battery cell unit bears the external force is avoided.

Description

Battery pack structure

Technical Field

The utility model relates to the technical field of battery packs, in particular to a structure for enhancing the bearing capacity of a battery pack.

Background

In recent years, new energy automobiles continue to develop, and the emergence of CTC technology relieves mileage anxiety. CTC is also called battery car body integration, is similar to 'battery cell integration' in the cell phone industry, and is a technical scheme for integrating a direct battery cell onto a chassis of an automobile. The upper surface of the battery cell is provided with the floor (battery cell shell) and the seat cross beam, the battery cell and the chassis are integrated into a whole and then assembled on the vehicle body, so that the mechanical structure of the battery cell can be utilized to bear the function of a part of the frame, the space utilization rate is increased, and the cruising of the vehicle is promoted. But the mechanical structure of the battery core is utilized to bear the function of a part of the frame, and the battery core needs to have a certain bearing capacity to ensure the driving safety of a user.

The name of the soft package power battery package reinforced shell (CN 216720102U) discloses the following technical scheme: including closing cap 1 and tray 2, tray 2 is including being used for placing the main part 3 of soft packet of battery and being located main part 3 top and carry out spacing portion 4 to closing cap 1, and four bight department all is provided with the backup pad 5 that will close cap 1 support in the main part 3, and four bight departments of closing cap 1 pass through the screw fixation on backup pad 5. In the above scheme, during normal use, soft package batteries are stacked one by one and placed in the main body part 3 of the tray 2, then the sealing cover 1 is covered on the limiting part 4, and the four corner support plates 5 of the sealing cover 1 can be used for improving the supporting strength of the sealing cover 1, so that the bearing capacity of the battery cell is improved to a certain extent, but the support plates are only arranged at the four corners of the sealing cover 1, when the sealing cover 1 receives larger pressure from a vehicle body and a seat, the supporting performance of the sealing cover 1 by the support plates 5 is insufficient, the sealing cover 1 is inevitably deformed and extruded to the battery cell, and dangers are caused.

The name "a high-strength battery pack case" (CN 208862070U) discloses the following technical scheme: the utility model provides a high strength battery package casing, includes shell 1, and shell 1's inside bottom surface is equipped with shock attenuation backing plate 2, and shock attenuation backing plate 2 and shell 1 fixed connection, and limit chute 4 has been seted up to shock attenuation backing plate 2's upper surface, and shock attenuation backing plate 2's upper surface is equipped with location card strip 3, location card strip 3 and shock attenuation backing plate 2 sliding connection, and location card strip 3's one end upper surface is equipped with fastening bolt 8, and fastening bolt 8 rotates with location card strip 3 to be connected, and shell 1's inside is equipped with stainless steel mold insert 6, stainless steel mold insert 6 and shell 1 fixed connection. The above proposal improves the strength of the battery pack case by providing the shock absorbing pad 2 and the stainless steel insert 6, but has no good protection effect on the pressure from above the battery pack and has higher cost.

Disclosure of Invention

The utility model provides a battery pack structure, which aims to improve the bearing capacity of a battery pack.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a battery package structure, battery case is for the box form that comprises bottom plate and bottom plate peripheral position surrounding position's curb plate and case mouth department is covered and is put the apron, and battery cell unit is arranged in the cavity that battery case and apron constitute, and staggered arrangement has crossbeam and longeron on the bottom plate of battery case, its characterized in that: the lower edge surface of the end plate arranged at the side surface of the battery cell unit is lapped on the cross beam or the longitudinal beam, and the upper edge surface of the end plate is higher than the height of the battery cell module at the side.

According to the utility model, the end plate higher than the battery cell module is arranged at the end part of the battery cell unit, the cover plate is pressed at the top of the end plate and forms a reserved space with the battery cell unit, and the cover plate is deformed under force and transmits the external force to the cross beam or the longitudinal beam through the end plate, so that the battery shell is used as a whole to bear load, and therefore, the bearing capacity of the battery pack is improved, and the condition that the battery cell unit bears the external force is avoided.

Drawings

Fig. 1 is a schematic diagram of a cell module housing in accordance with the present utility model;

FIG. 2 is a block diagram of a cell module according to the present utility model;

figure 3 is a bottom view of the cell module of the present utility model;

fig. 4 is a schematic view of a battery case in the present utility model;

FIG. 5 is an assembly view of the present utility model;

FIG. 6 is a cross-sectional view of the utility model with the assembly in place;

fig. 7 is a schematic view of the overall structure of the battery pack.

Detailed Description

As shown in fig. 1 to 6, in a battery pack structure, a battery case 20 is box-shaped and a cover plate 30 is covered at a box opening, which is formed by a bottom plate 21 and a side plate 22 surrounding the periphery of the bottom plate 21, a battery cell 10 is placed in a cavity formed by the battery case 20 and the cover plate 30, and a cross beam 211 and a longitudinal beam 212 are alternately arranged on the bottom plate 21 of the battery case 20, and the structure is characterized in that: the lower edge surface 112 of the end plate 11 provided at the side of the cell unit 10 is pressed against the cross beam 211 or the longitudinal beam 212, and the upper edge surface 111 of the end plate 11 is higher than the side cell module 14.

In the above scheme, the end plate 11 higher than the height of the battery cell module 14 is arranged at the end of the battery cell 10, when the cover plate 30 is pressed on the upper edge surface 111 of the end plate 11, a reserved space is formed between the cover plate 30 and the battery cell module 14, and when the cover plate 30 is deformed under stress, external force is transferred to the cross beam 211 or the longitudinal beam 212 via the end plate 11, so that the battery shell is used as a whole to bear load, and therefore, the bearing capacity of the battery pack is improved, and the situation that the battery cell bears external force is avoided.

The two end plates 11 are arranged opposite to each other, a supporting plate 12 is arranged between the two end plates 11, side walls 13 are arranged at the edges of the two side plates of the supporting plate 12 between the two end plates 11, and the battery cell modules 14 are positioned in a concave area surrounded by the end plates 11, the supporting plate 12 and the side walls 13 and fixedly connected with the supporting plate 12. The recess area surrounded by the end plate 11, the supporting plate 12 and the side wall 13 in the above scheme corresponds to a box unit with reliable strength, and is extremely safe for accommodating the battery cell module 14.

Preferably, the end plate 11 is fixedly connected to the upper parts of two end surfaces of the supporting plate 12, the bottom edge of the end plate 11 is higher than the bottom surface of the supporting plate 12, a right angle-shaped corner groove 15 is formed between the lower edge surface 112 of the end plate 11 and the end surface of the supporting plate 12, the corner groove 15 is clamped at the corner part of the cross beam 21 or the longitudinal beam 22, and the supporting plate 12 is arranged in the area surrounded by the cross beam 211 and the longitudinal beam 212.

The corner groove 15 is clamped at the corner part of the cross beam 211 or the longitudinal beam 212, so that the primary positioning of the battery cell 10 can be realized, namely, the displacement of the battery cell 10 in the direction perpendicular to the length direction of the cross beam 211 or the longitudinal beam 212 is limited.

Preferably, the peripheral outline of the end plate 11 is convex, and the cover plate 30 is pressed on the top surface of the convex part of the end plate 11. The peripheral outline of the end plate 11 is convex, so that the protruding part at the top is convenient to support and match with the cover plate 30, consumable materials are reduced, lightweight design is realized, and meanwhile, a connecting assembly space is provided for the fixed connection, namely threaded

holes

115 and 116 are arranged on the step parts at the two sides of the protruding part of the end plate 11 and the upper and lower concentric cores of the hole cores of the cross beam 211 or the longitudinal beam 212 for connecting the battery cell unit 10 and the battery shell 20 through bolts. This further enables a reliable connection of the battery cell 10 to the battery housing 20.

Claims

1. The utility model provides a battery package structure, battery casing (20) is box form and box mouth department is covered and is put apron (30) that comprise bottom plate (21) and curb plate (22) of bottom plate (21) periphery position, and battery casing (20) and apron (30) constitute are arranged in to electric core unit (10) in the cavity, have alternately arranged crossbeam (211) and longeron (212) on bottom plate (21) of battery casing (20), its characterized in that: the lower edge surface (112) of the end plate (11) arranged at the side surface of the battery cell (10) is lapped on the cross beam (211) or the longitudinal beam (212), and the upper edge surface (111) of the end plate (11) is higher than the side battery cell (14).

2. The battery pack structure according to claim 1, wherein: the two end plates (11) are arranged opposite to each other, a supporting plate (12) is arranged between the two end plates, side walls (13) are arranged at the edges of the two side plates of the supporting plate (12) between the two end plates (11), and the cell module (14) is positioned in a concave area surrounded by the end plates (11), the supporting plate (12) and the side walls (13) and fixedly connected with the supporting plate (12).

3. The battery pack structure according to claim 2, wherein: the end plates (11) are fixedly connected with the upper parts of two end faces of the supporting plate (12), the bottom edges of the end plates (11) are higher than the bottom faces of the supporting plate (12), right-angle corner grooves (15) are formed between the lower edge faces (112) of the end plates (11) and the end faces of the supporting plate (12), the corner grooves (15) are clamped at the corner parts of the cross beam (211) or the longitudinal beam (212), and the supporting plate (12) is arranged in the area surrounded by the cross beam (211) and the longitudinal beam (212).

4. The battery pack structure according to claim 2, wherein: the peripheral outline of the end plate (11) is convex.

5. The battery pack structure according to claim 1, wherein: the cover plate (30) is pressed on the top surface of the protruding part of the end plate (11).

6. The battery pack structure according to claim 4, wherein: screw holes (115, 116) are arranged on the upper and lower concentric cores of the steps on the two sides of the protruding part of the end plate (11) and the hole cores of the cross beam (211) or the longitudinal beam (212) for connecting the battery cell unit (10) and the battery shell (20) through bolts.