CN221041410U

CN221041410U - Battery fixing device and battery pack with same

Info

Publication number: CN221041410U
Application number: CN202322476597.4U
Authority: CN
Inventors: 丁鑫
Original assignee: Nanjing Jiuchi Electromechanical Industry Co ltd
Current assignee: Nanjing Jiuchi Electromechanical Industry Co ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-28
Anticipated expiration: 2033-09-13

Abstract

The utility model relates to a battery fixing device and a battery pack with the same, wherein the battery fixing device comprises at least two retainers, the retainers are provided with grooves for receiving battery units, one end of each groove is provided with a through hole, and the other end of each groove is provided with an end part, and the battery fixing device is characterized in that the end part of at least one retainer is provided with an elastic element abutted against the end part of a battery. After the utility model is adopted, as the end face of the battery unit is abutted with the elastic element at the end of the retainer, the clearance fit or interference fit caused by manufacturing errors of the distance between the end of the left retainer and the end face of the battery core can be avoided, and the end of the retainer and the end face of the battery are prevented from damaging the end face of the battery due to the pressure of the end of the retainer and the end face of the battery; and the battery unit failure in the use process caused by insufficient limit of the end part and the battery end face due to clearance fit can be avoided.

Description

Battery fixing device and battery pack with same

Technical Field

The present utility model relates to a battery fixing device and a battery pack having the same.

Background

The conventional battery fixing device for holding the battery in the market improves the radial positioning structure of the battery, does not perform positioning design on the axial direction of the battery, and is known by performing a roller test on a battery pack, if the axial positioning structure of the battery fails, welding spots of a battery connecting sheet are easy to fall off, so that the function of the battery is possibly invalid; if a single end face axial positioning is used, the battery is easily damaged if the axial clamping is excessive due to manufacturing errors, and safety problems are caused.

Disclosure of utility model

The utility model aims at: aiming at the defects in the prior art, a scheme for solving the axial positioning of the battery shaft is provided, and meanwhile, the battery fixing device on the end face of the battery is not damaged.

In order to achieve the above object, the basic technical scheme of the battery fixing device of the utility model is as follows: comprising at least two holders having a slot for receiving a battery, one end of the slot having a through hole and the other end having an end, characterized in that said end of at least one holder has an elastic element abutting against the end of the battery.

After the utility model is adopted, because the end face of the battery is abutted with the elastic element at the end of the retainer, the clearance fit or interference fit caused by manufacturing errors of the distance between the end of the left retainer and the end face of the battery core can be avoided, and the end face of the battery is prevented from being damaged due to the fact that the end of the retainer is in pressure with the end face of the battery; and the battery failure in the use process caused by insufficient limit between the end part and the end face of the battery due to clearance fit can be avoided.

The utility model is further perfected as follows: the elastic element is integrally formed with the cage.

The utility model is further perfected as follows: the elastic element is at least two elastic arms which are uniformly arranged.

The utility model is still further perfected as follows: the elastic arm is provided with a boss which is abutted with the end face of the battery unit.

The utility model is still further perfected as follows: the boss is provided with a positioning surface which is abutted with the end surface of the battery unit, and the positioning surface is a plane or an arc surface.

The utility model is still further perfected as follows: the side walls of the groove of at least one of the holders have openings.

The utility model is still further perfected as follows: the battery fixing device is arranged in a battery pack, the battery pack is provided with at least two battery units, an upper shell and a lower shell, and the battery fixing device is arranged in a containing cavity formed by the upper shell and the lower shell.

The utility model is still further perfected as follows: the lower shell is provided with a plurality of positioning ribs, the positioning ribs are arranged between two adjacent elastic elements, the upper parts of the positioning ribs are obliquely arranged, and the bottoms of the positioning ribs are in butt joint with the retainer.

Another aspect of the utility model discloses a battery pack comprising a battery securing apparatus according to any one of the preceding claims, at least two battery cells, an upper housing and a lower housing, the battery securing apparatus being disposed within a receiving chamber formed by the upper housing and the lower housing.

The utility model is further perfected as follows: the lower shell is provided with a plurality of positioning ribs, the positioning ribs are arranged between two adjacent elastic elements, the upper parts of the positioning ribs are obliquely arranged, and the bottoms of the positioning ribs are in butt joint with the retainer.

Drawings

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of a battery pack according to a first embodiment of the present utility model.

Fig. 2 is a cross-sectional view of the battery pack of the embodiment of fig. 1.

Fig. 3 is a B-B cross-sectional view of the embodiment of fig. 2.

Fig. 4 is a front view of the left cage of the embodiment of fig. 2.

Fig. 5 is a perspective partial cross-sectional view of the left cage of the embodiment of fig. 2.

Fig. 6 is a perspective partial cross-sectional view of an alternative embodiment of the left cage.

Fig. 7 is a front view of another alternative embodiment of a left cage.

Fig. 8 is a partial cross-sectional view of the tooling of the embodiment of fig. 2.

Detailed Description

Examples

The battery pack of this embodiment has an overall structure mainly including an upper case 1, a lower case 2, battery fixing means provided in a receiving chamber formed by the upper case 1 and the lower case 2, at least one battery cell 3 held by the battery fixing means, and an electric connection piece 4 electrically connected to an end portion of the battery, as shown in fig. 1, 2.

The battery fixing device includes a left holder 6 and a right holder 7, and the left holder 6 and the right holder 7 hold the battery cell 3 together. The left holder 6, the right holder 7, and the corresponding portions of the end portions of the respective battery cells 3 form through holes to allow the electrical connection sheets 4 to be connected to the end electrodes of the battery cells 3. The electrical connection piece 4 is connected to the end electrode of the battery cell 3 by welding.

The left and right holders 6, 7 have grooves 61, 71 for accommodating the battery cells 3 of cylindrical configuration, one ends of the grooves 61, 71 are open through holes for placing the battery cells 3 in the holders, the other ends of the grooves 61, 71 have radially extending ends, and both ends of the left and right holders 6, 7 have screw posts 64, 74 fixedly connected to the housing. The side wall of the groove 71 of the right holder 7 shown in fig. 1 has an opening 72 for heat dissipation of the battery cell 3. The left holder 6 and the right holder 7 are mated with the mating male 73 by the mating female 63 and fixed by the screw 5. Fig. 4 shows a front view of the left cage 6, with an axial spring element 65 at the end, the spring element 65 being formed integrally with the cage 6, but it can also be made of other materials and be connected to the cage. The elastic member 65 is preferably a pair of elastic arms 65 uniformly provided, and the elastic arms 65 have bosses 651 that abut against the battery cells 3. As shown in fig. 4, the positioning surfaces of the boss 651 and the battery end surface 31 are flat surfaces. The positioning surface is not limited to a plane, and may be an arc surface as shown in fig. 6. The elastic members 65 are not limited to two but may be constituted by three elastic arms as shown in fig. 7.

In manufacturing the battery pack, the battery cells 3 are fitted into the grooves 61, 71 of one of the left and right holders 6, 7, and the other of the left and right holders 6, 7 is fitted over the corresponding battery cell 3. Next, the battery fixing device is fitted into the corresponding tool 8, and as shown in fig. 8, the press-fit tool 8 has a wall 81 abutting against the end of the left holder 6, and a tool hole 82 corresponding to the through hole of the left holder 6, with the elastic arm 65 being located in the tool hole 82 so as not to contact the wall 81. The screws 5 then fixedly mount the left cage 6 to the right cage 7. The battery end face 31 is abutted with the elastic arm 65, so that the clearance fit or interference fit caused by manufacturing errors of the distance between the end part of the left retainer 6 and the battery end face 31 can be avoided, and the end part of the retainer 6 and the battery end face 31 are prevented from being damaged by the interference fit and pressure; the failure of the battery unit 3 in use due to insufficient spacing of the end portions and the battery end face 31 due to clearance fit can also be avoided.

As shown in fig. 2 and 3, the lower case 2 is provided with a plurality of positioning ribs 21 capable of restricting the battery fixing device from moving in the axial direction thereof, the positioning ribs 21 are provided between vertically adjacent two elastic members, the upper portion is inclined and the bottom portion is abutted against the left and right holders 6, 7, and the electrodes of the battery unit 3 can be protected. The positioning ribs 21 give out the abdication space of the elastic element 65 when the battery pack is assembled, the upper part is obliquely provided with a guiding battery fixing device to be installed in the lower shell 2, the bottom is abutted with the left and right retainers 6 and 7, and the battery failure caused by insufficient limiting between the battery fixing device and the axis of the shell in the use process is avoided.

In addition to the embodiments described above, other embodiments of the utility model are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A battery fixing device comprising at least two holders having a groove for receiving a battery cell, said groove having a through-hole at one end and an end at the other end, characterized in that said end of at least one of said holders has an elastic element abutting against an end of a battery cell.

2. The battery fixation device of claim 1, wherein: the elastic element is integrally formed with the cage.

3. The battery fixation device of claim 1, wherein: the elastic element is at least two elastic arms which are uniformly arranged.

4. A battery fixation device according to claim 3, wherein: the elastic arm is provided with a boss which is abutted with the end face of the battery unit.

5. The battery fixation device of claim 4, wherein: the boss is provided with a positioning surface which is abutted with the end surface of the battery unit, and the positioning surface is a plane or an arc surface.

6. The battery fixation device of claim 5, wherein: the side walls of the groove of at least one of the holders have openings.

7. The battery fixation device of any one of claims 1-6, wherein: the battery fixing device is arranged in a battery pack, the battery pack is provided with at least two battery units, an upper shell and a lower shell, and the battery fixing device is arranged in a containing cavity formed by the upper shell and the lower shell.

8. The battery fixation device of claim 7, wherein: the lower shell is provided with a plurality of positioning ribs, the positioning ribs are arranged between two adjacent elastic elements, the upper parts of the positioning ribs are obliquely arranged, and the bottoms of the positioning ribs are in butt joint with the retainer.

9. A battery pack comprising the battery fixing device of any one of the preceding claims 1-6, at least two battery cells, an upper housing and a lower housing, characterized in that: the battery fixing device is disposed in a receiving chamber formed by the upper case and the lower case.

10. The battery pack according to claim 9, wherein: the lower shell is provided with a plurality of positioning ribs, the positioning ribs are arranged between two adjacent elastic elements, the upper parts of the positioning ribs are obliquely arranged, and the bottoms of the positioning ribs are in butt joint with the retainer.