CN221102262U

CN221102262U - Battery pack

Info

Publication number: CN221102262U
Application number: CN202322521278.0U
Authority: CN
Inventors: 李汶航; 陈朝海; 陈智伟; 罗锟; 饶焰
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-06-07
Anticipated expiration: 2033-09-15

Abstract

The present utility model relates to a battery pack comprising: a beam body; an output pole mount connected to the beam body; the output pole base and the beam body are fixed through a fastener. In view of the fact that the output electrode base is mounted on the cross beam of the battery pack in a clamping manner in the prior battery technology, abnormal sound is generated due to vibration caused by reserved assembly gaps, the battery pack of the embodiment changes a connecting manner of the fasteners to enable the output electrode base to be tightly fixed on the beam body through the fasteners, so that the output electrode base and the beam body are assembled more compactly, abnormal sound generated by vibration can be effectively reduced, and even abnormal sound cannot be generated; meanwhile, the energy density of the battery pack can be improved.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

At present, a battery module generally comprises a module end plate and an output electrode base, wherein the output electrode base is connected with an output electrode copper bar and a bus bar in the battery module through bolts. In order to mount the output electrode base, it is generally necessary to separately machine a groove on the module end plate, and it is generally necessary to increase the thickness of the module end plate to secure the stability of the output electrode base connection, but when the thickness and weight of the module end plate are increased, it may result in a smaller energy density of the battery module.

In order to solve the above problems, in some prior art schemes, the output pole base is mounted on the beam of the battery pack in a clamping manner, so that the existing manner of increasing the thickness of the module end plate to ensure the stability of the connection of the output pole base is not needed, and the problem that the energy density of the battery module is small due to the increase of the thickness and the weight of the module end plate is avoided.

However, in the above technical solution, because the output pole base and the cross beam adopt the matching connection mode of the clamping connection, in order to ensure normal assembly, an assembly gap is usually reserved between the output pole base and the cross beam, however, the existence of the assembly gap can make the battery module to emit abnormal sound due to collision after being vibrated in the use process, and the improvement exists.

Disclosure of utility model

In order to overcome at least one of the above-mentioned drawbacks of the prior art, according to an aspect of the present utility model, a battery pack is provided that can effectively reduce abnormal noise generated by shaking due to vibration.

A battery pack, comprising:

A beam body;

an output pole mount connected to the beam body; the output pole base and the beam body are fixed through a fastener.

Optionally, the output pole base is provided with a first through hole, and the fastener penetrates through the first through hole to be connected with the beam body.

Optionally, the fastener includes a bolt and a nut, and a shank of the bolt passes through the first through hole and is connected with the beam body through the nut.

Optionally, the first through hole is provided with a reinforcing ring, and a screw rod of the bolt penetrates through the reinforcing ring and is connected with the beam body through the nut.

Optionally, one of the circumferential outer side surface of the reinforcing ring and the inner side surface of the first through hole is provided with a groove, and the other is provided with a reinforcing block which is embedded with the groove.

Optionally, the battery pack further includes:

The protection cover is clamped with the output electrode base, and an assembly space is reserved between the protection cover and the output electrode base.

Optionally, the protective cover is provided with a hanging lug, and the output electrode base is provided with a connecting column;

one of the hanging lugs and the connecting column is provided with a clamping groove, and the other is provided with a clamping block which is clamped with the clamping groove.

Optionally, the output pole base has first through holes on two opposite sides, and the connecting column is arranged between the first through holes on two opposite sides.

Optionally, the beam body is provided with a second through hole, and one end of the nut passes through the second through hole, extends into the first through hole and is abutted against Liang Tishang;

the distance a between one end of the nut and the first through hole is at least 0.5mm.

Optionally, the battery pack further includes:

a busbar connected to the output pole mount; the busbar is provided with a third through hole, and the third through hole is a waist-shaped hole extending along a first direction, wherein the first direction is a direction perpendicular to the side surface of the beam body in the length direction.

In summary, the battery pack provided by the utility model has the following technical effects:

In view of the fact that the output electrode base is mounted on the cross beam of the battery pack in a clamping manner in the prior battery technology, abnormal sound is generated due to vibration caused by reserved assembly gaps, the battery pack of the embodiment changes a connecting manner of the fasteners to enable the output electrode base to be tightly fixed on the beam body through the fasteners, so that the output electrode base and the beam body are assembled more compactly, abnormal sound generated by vibration can be effectively reduced, and even abnormal sound cannot be generated;

Meanwhile, when the scheme that the output pole base is assembled on the beam body through the fastener is adopted, the size of the output pole base can be relatively reduced due to the fact that the size of the beam body is large and enough structural strength is provided, so that a finished product of the output pole base can be smaller, occupied space inside a battery pack is reduced, and energy density of the battery pack is improved.

Drawings

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

Fig. 2 is a schematic view of a battery pack according to an embodiment of the present utility model;

FIG. 3 is a schematic view showing the assembly of the output electrode base and the protective cover in the battery pack according to the embodiment of the utility model;

fig. 4 is a sectional view showing the internal structure of a battery pack according to an embodiment of the present utility model;

FIG. 5 is an enlarged view of a portion of FIG. 4A;

FIG. 6 is an enlarged view of a portion of B in FIG. 4;

fig. 7 is another structural schematic view of a battery pack according to an embodiment of the present utility model;

The accompanying drawings: the high-voltage power supply comprises a 1-beam body, a 11-second through hole, a 2-output electrode base, a 21-first through hole, a 22-reinforcing block, a 23-connecting column, a 231-clamping block, a 31-bolt, a 32-nut, a 4-reinforcing ring, a 41-groove, a 5-protective cover, a 51-hanging lug, a 511-clamping groove, a 6-assembling space, a 7-busbar, a 71-third through hole and an 8-output electrode copper bar.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1-7, an embodiment of the present utility model discloses a battery Pack, which may be specifically applied to CTP technology, where CTP (i.e., cell to Pack) technology, also called no-module technology, i.e., omitting or reducing modules, and arranging a battery Cell directly in the battery Pack.

The battery pack of the embodiment comprises a beam body 1 and an output electrode base 2, wherein the output electrode base 2 is connected with the beam body 1; the output pole base 2 and the beam body 1 are fixed by a fastener.

In view of the fact that the output pole base 2 is mounted on the cross beam of the battery pack in a clamping manner in the prior art, abnormal sound is generated due to vibration caused by reserved assembly gaps, the battery pack of the embodiment changes a connection manner of a fastener, the output pole base 2 is tightly fixed on the beam body 1 through the fastener, the output pole base 2 and the beam body 1 are assembled more compactly, the abnormal sound generated by vibration can be effectively reduced, and even the abnormal sound cannot be generated.

Meanwhile, in CTP technology, the size of the space in the battery pack is considered first, because the beam body 1 is a main support member of the battery pack, and the expansion of the battery needs to be resisted, so when the battery pack of this embodiment is designed, the size of the beam body 1 will be larger to meet the structural strength, therefore, when the battery pack of this embodiment adopts the scheme that the output pole base 2 is assembled on the beam body 1 through the fastener, in view of the large size of the beam body 1, the size of the output pole base 2 can be relatively reduced in view of the large size of the beam body 1, so that the finished product of the output pole base 2 will be smaller, so as to reduce the occupied space inside the battery pack, and further improve the energy density of the battery pack.

Alternatively, in a practical product, the volume occupation space of the output electrode base 2 may be 73.2x25x22mm.

Referring to fig. 1 and 2, the output pole base 2 may alternatively have a first through hole 21, and the fastener may be connected to the nut 32 through the first through hole 21. Therefore, the structure of the fastener and the output electrode base 2 is more compact, the occupied space of the battery pack is further reduced, and the energy density of the battery pack is further improved.

Referring to fig. 4, alternatively, the fastener includes a bolt 31 and a nut 32, and a shank of the bolt 31 passes through the first through hole 21 and is coupled to the beam 1 by the nut 32. Like this, hug closely output pole base 2 through bolt 31 and fix on roof beam body 1 for output pole base 2 and roof beam body 1 assemble compacter, can reduce effectively and rock the abnormal sound that produces because of vibrations, can not produce the abnormal sound even. Meanwhile, the mode of locking by the bolts 31 can absorb the overlapped dimensional tolerance, so that the assembly of the output electrode base 2 and the beam body 1 is more stable. Meanwhile, the assembly by adopting the mode of locking the bolts 31 is simpler and quicker, and the assembly efficiency is improved. In addition, the bolts 31 can form a disassembly and assembly structure, and are convenient to disassemble, so that maintenance difficulty is reduced.

Preferably, the nut 32 is a blind rivet nut 32. Thus, the output pole base 2 and the beam body 1 can be fixed, and the structure is simple, the manufacturing is convenient, and the manufacturing cost is low.

Referring to fig. 3, the first through hole 21 is optionally provided with a reinforcing ring 4, and a screw of a bolt 31 passes through the reinforcing ring 4 and is connected to the beam 1 by a nut 32. In view of the problem that the connection of the fastener and the output pole base 2 is easily crushed during the actual assembly process, the reinforcing ring 4 is added at the first through hole 21, and the screw of the bolt 31 passes through the reinforcing ring 4 to be connected with the beam body 1, so as to improve the strength of the locked area. Meanwhile, the strength of the output electrode base 2 can be effectively increased, and the durability is improved.

Wherein preferably the reinforcement ring 4 may be a steel jacket. Thus, the strength of the locked area is improved, and the structure is simple, the manufacturing is convenient and the manufacturing cost is low.

Referring to fig. 5, alternatively, one of the circumferential outer side surface of the reinforcing ring 4 and the inner side surface of the first through hole 21 has a groove 41, and the other is provided with a reinforcing block 22 fitted into the groove 41. By providing the reinforcing block 22 and the groove 41 which are fitted in this manner, the structural strength of the output electrode base 2 can be further improved, and the durability can be improved. And, the output pole base 2 can be made of PBT+30% GF material, and the output pole base 2 can be injection molded with the reinforcing ring 4.

Referring to fig. 3, optionally, the battery pack of the present embodiment further includes a protection cover 5, where the protection cover 5 is clamped with the output electrode base 2, and an assembly space 6 is provided between the protection cover 5 and the output electrode base 2. In view of the fact that the output electrode base 2 is connected with the output electrode copper bar 8 and the bus bar 7 in the battery module through bolts 31, in order to facilitate assembly of the output electrode copper bar 8 and the bus bar 7, an assembly space 6 is reserved between the protective cover 5 and the output electrode base 2, and meanwhile the protective cover 5 is clamped on the output electrode base 2, so that the protective cover 5 can be conveniently disassembled and assembled, and the output electrode copper bar 8 and the bus bar 7 can be conveniently assembled.

Preferably, the output electrode base 2 and/or the protective cover 5 can be made of PBT+30% GF material to meet the assembly requirement, wherein PBT is dibutyl terephthalate (Polybutylene terephathalate), and GF is glass fiber. Therefore, the output electrode base 2 and the protective cover 5 have good toughness and elasticity, can resist the high temperature of 250 ℃, and have great advantages in the battery pack.

Referring to fig. 3, optionally, a hanging lug 51 is provided on the protective cover 5, and a connecting post 23 is provided on the output electrode base 2; one of the hanging lugs 51 and the connecting column 23 is provided with a clamping groove 511, and the other is provided with a clamping block 231 which is clamped with the clamping groove 511. Thus, the protective cover 5 is convenient to assemble and disassemble so as to assemble the output electrode copper bar 8 and the bus bar 7, and meanwhile, the structure is simple, the manufacture is convenient, and the manufacturing cost is low.

Referring to fig. 2, alternatively, the output electrode base 2 has first through holes 21 on opposite sides thereof, and the connection posts 23 are disposed between the first through holes 21 on opposite sides thereof. Like this, the structure on the output pole base 2 can be compacter to make the product size of output pole base 2 littleer, in order to reduce the inside occupation space of battery package, and then improve the energy density of battery package.

Referring to fig. 6, optionally, the beam 1 is provided with a second through hole 11, and one end of a nut 32 passes through the second through hole 11, extends into the first through hole 21 and abuts against the beam 1; the distance a between one end of the nut 32 and the first through hole 21 is at least 0.5mm. In order to prevent the problem that the assembly cannot be performed after the stacking of the size errors during the assembly, a space a of at least 0.5mm is reserved between the first through hole 21 on the output electrode base 2 and the matching position of the nut 32, so that the tolerance can be absorbed, the normal assembly can be ensured, and the stability of the structure can be improved.

Wherein preferably the distance a between the end of the nut 32 and the first through hole 21 is 0.5mm, 0.4mm, 0.3mm, 0.2mm or 0.1mm, although in other embodiments the distance a between the end of the nut 32 and the first through hole 21 may be other values between 0-0.5 mm.

Referring to fig. 7, optionally, the battery pack of the present embodiment further includes a busbar 7, where the busbar 7 has a third through hole 71, and the third through hole 71 is configured as a waist-shaped hole extending along a first direction, where the first direction is a direction perpendicular to a side surface of the beam body 1 in the length direction. In the illustrated embodiment, the first direction is the X direction and the longitudinal direction of the beam 1 is the Y direction. Thus, the waist-shaped holes are combined with the interval a of 0.5mm, so that tolerance can be absorbed better to ensure assembly, and stability is further improved.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. A battery pack, comprising:

A beam body (1);

The output electrode base (2) is connected with the beam body (1); the output pole base (2) and the beam body (1) are fixed through fasteners; the output pole base (2) is provided with a first through hole (21), and the fastener penetrates through the first through hole (21) to be connected with the beam body (1).

2. A battery pack according to claim 1, wherein the fastener comprises a bolt (31) and a nut (32), and the screw of the bolt (31) passes through the first through hole (21) and is connected to the beam body (1) by the nut (32).

3. A battery pack according to claim 2, wherein the first through hole (21) is provided with a reinforcement ring (4), and the screw of the bolt (31) passes through the reinforcement ring (4) and is connected to the beam body (1) by the nut (32).

4. A battery pack according to claim 3, wherein one of the circumferential outer side surface of the reinforcing ring (4) and the inner side surface of the first through hole (21) has a groove (41), and the other is provided with a reinforcing block (22) fitted into the groove (41).

5. The battery pack of claim 1, further comprising:

The protection cover (5) is clamped with the output electrode base (2), and an assembly space (6) is formed between the protection cover (5) and the output electrode base (2).

6. A battery pack according to claim 5, wherein the protective cover (5) is provided with a hanging lug (51), and the output pole base (2) is provided with a connecting column (23);

One of the hanging lugs (51) and the connecting column (23) is provided with a clamping groove (511), and the other is provided with a clamping block (231) which is clamped with the clamping groove (511).

7. A battery pack according to claim 6, wherein the output electrode base (2) has first through holes (21) on opposite sides thereof, and the connecting posts (23) are disposed between the first through holes (21) on opposite sides thereof.

8. A battery pack according to claim 2, wherein the beam body (1) is provided with a second through hole (11), and one end of the nut (32) passes through the second through hole (11), extends into the first through hole (21) and is abutted against the beam body (1);

A distance a between one end of the nut (32) and the first through hole (21) is at least 0.5mm.

9. The battery pack of claim 1, further comprising:

A busbar (7) connected to the output electrode mount (2); the busbar (7) is provided with a third through hole (71), and the third through hole (71) is a waist-shaped hole extending along a first direction, wherein the first direction is a direction perpendicular to the side surface of the beam body (1) in the length direction.