CN216213881U

CN216213881U - Lithium ion battery pack

Info

Publication number: CN216213881U
Application number: CN202122756452.0U
Authority: CN
Inventors: 赵先国; 梁勇; 匡国芳
Original assignee: Shanghai Baicheng Electric Equipment Manufacture Co Ltd
Current assignee: Shanghai Baicheng Electric Equipment Manufacture Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-05
Anticipated expiration: 2031-11-11

Abstract

The utility model belongs to the technical field of lithium ion batteries, and discloses a lithium ion battery pack which comprises a shell, a PCB (printed circuit board) assembly, a battery cell containing shell, a battery cell containing cover and a plurality of square lithium ion batteries, wherein the PCB assembly and the battery cell containing shell are arranged in the shell, the battery cell containing cover is arranged at the opening end of the battery cell containing shell, the square lithium ion batteries are sequentially stacked in the battery cell containing shell, and a lug of each square lithium ion battery penetrates through the battery cell containing cover to be connected with the PCB assembly. The lithium ion battery pack can improve the product safety, improve the capacity and the endurance time of the product and reduce the appearance volume of the product.

Description

Lithium ion battery pack

Technical Field

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

Background

In recent years, lithium ion batteries have become more widely used. Lithium ion batteries are widely used in energy storage power systems such as hydraulic power, fire power, wind power and solar power stations, and also widely used in a plurality of fields such as electric tools, garden tools, cleaning tools, electric bicycles, electric motorcycles and electric automobiles, and have gradually become common articles in daily life of people.

However, the conventional battery pack is formed by using a cylindrical lithium ion battery cell, and has the defects of large volume, low capacity, short endurance time, low safety and the like.

Therefore, a lithium ion battery pack is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lithium ion battery pack which can improve the safety of products, improve the capacity and the endurance time of the products and reduce the appearance volume of the products.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a lithium ion battery pack, includes casing, PCB board subassembly, electric core and holds the shell, electric core and hold lid and a plurality of square lithium ion battery cell, PCB board subassembly and electric core holds the shell setting and is in the casing, electric core holds the lid setting and is in the open end that the shell was held to the electric core, and is a plurality of square lithium ion battery cell stacks gradually and sets up in the electric core holds the shell, square lithium ion battery cell's utmost point ear passes electric core hold the lid with PCB board subassembly is connected.

Preferably, the PCB assembly includes a first PCB and a second PCB, the first PCB is disposed at one end of the battery cell accommodating cover departing from the battery cell accommodating case, the second PCB is disposed on a side wall of the battery cell accommodating case, the tab is connected to the first PCB, and the first PCB is connected to the second PCB.

Preferably, a first connecting plate and a second connecting plate are arranged on the side wall of the battery cell accommodating shell, one end of the first connecting plate is connected with the first electrode of the first PCB, the other end of the first connecting plate is connected with the second PCB, one end of the second connecting plate is connected with the second electrode of the first PCB, and the other end of the second connecting plate is connected with the second PCB.

Preferably, the second PCB board has been seted up first joint hole and second joint hole, the other end of first connecting plate is provided with first joint portion, first joint portion with first joint hole joint, the other end of second connecting plate is provided with second joint portion, second joint portion with second joint hole joint.

Preferably, a first buckle is arranged on the side wall of the battery cell accommodating shell, and the first buckle is clamped with the second PCB.

Preferably, one end of the battery cell accommodating cover, which is far away from the battery cell accommodating shell, is provided with a first threaded hole, the first PCB board is provided with a first through hole, and a first screw penetrates through the first through hole and is in threaded connection with the first threaded hole.

Preferably, a second threaded hole is formed in the side wall of the battery cell accommodating shell, a second through hole is formed in the second PCB, and a second screw penetrates through the second through hole and is in threaded connection with the second threaded hole.

Preferably, the battery cell accommodating cover is provided with a second buckle, a protruding portion is arranged on the side wall of the battery cell accommodating shell, and the second buckle is connected with the protruding portion in a clamping mode.

Preferably, a plurality of cushions are arranged in the battery cell accommodating shell, the cushions are arranged at intervals, and at least one square lithium ion battery cell is clamped between every two adjacent cushions.

Preferably, the casing comprises a battery pack upper cover and a battery pack lower cover, and the battery pack upper cover is arranged at the opening end of the battery pack lower cover.

The utility model has the beneficial effects that:

according to the lithium ion battery pack provided by the utility model, the battery cell accommodating shell and the battery cell accommodating cover are arranged, the battery cell accommodating cover is arranged at the opening end of the battery cell accommodating shell, the square lithium ion battery cells are sequentially stacked in the battery cell accommodating shell, the space in the battery cell accommodating shell is fully utilized, so that the volume of the lithium ion battery pack is reduced, the capacity and the endurance time of the lithium ion battery pack in unit volume are improved, the battery cell accommodating shell is arranged in the shell, and the shell and the battery cell accommodating shell perform double protection on the square lithium ion battery cells, so that the safety performance of the lithium ion battery pack is greatly improved. The lithium ion battery pack can improve the product safety, improve the capacity and the endurance time of the product and reduce the appearance volume of the product.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lithium ion battery pack provided by the present invention;

fig. 2 is an exploded view of a lithium ion battery pack provided by the present invention.

In the figure:

100. a housing; 101. covering the battery pack; 102. a battery pack lower shell; 200. a PCB board assembly; 201. a first PCB board; 2011. a first through hole; 2012. a first screw; 202. a second PCB board; 2021. a first clamping hole; 2022. a second clamping hole; 2023. a second through hole; 2024. a second screw; 300. a cell containment shell; 301. a first connecting plate; 3011. a first clamping part; 302. a second connecting plate; 3021. a second clamping part; 303. a first buckle; 304. a second threaded hole; 305. a boss portion; 400. a cell housing cover; 401. a first threaded hole; 402. a second buckle; 500. a square lithium ion battery cell; 501. a tab; 502. a cushion pad.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 and fig. 2, the present embodiment provides a lithium ion battery pack, which includes a casing 100, a PCB assembly 200(PCB, which is also called a printed circuit board, and is an important electronic component, and is a support body of the electronic component, and is a carrier for electrical interconnection of the electronic component), a battery cell accommodating case 300, a battery cell accommodating cover 400, and a plurality of square lithium ion batteries 500, wherein the PCB assembly 200 and the battery cell accommodating case 300 are disposed in the casing 100, the battery cell accommodating cover 400 is disposed at an open end of the battery cell accommodating case 300, the plurality of square lithium ion batteries 500 are sequentially stacked in the battery cell accommodating case 300, and tabs 501 of the square lithium ion batteries 500 penetrate through the battery cell accommodating cover 400 and are connected to the PCB assembly 200.

The lithium ion battery package that this embodiment provided, hold shell 300 and electric core through setting up electric core and hold lid 400, electric core holds lid 400 and sets up the open end that holds shell 300 at electric core, a plurality of square lithium ion battery cell 500 range upon range of the setting in proper order is in electric core holds shell 300, the space in electric core holds shell 300 obtains make full use of, make the volume of lithium ion battery package reduce, the capacity and the time of endurance of lithium ion battery package in the unit volume have been improved, and electric core holds shell 300 and sets up in casing 100, casing 100 and electric core hold shell 300 carry out duplicate protection to square lithium ion battery cell 500, improve the security performance of lithium ion battery package by a wide margin. The lithium ion battery pack can improve the product safety, improve the capacity and the endurance time of the product and reduce the appearance volume of the product.

The PCB assembly 200 in this embodiment includes a first PCB 201 and a second PCB 202, wherein the first PCB 201 is disposed at an end of the electrical core accommodating cover 400 away from the electrical core accommodating case 300, the tab 501 is connected to the first PCB 201, the second PCB 202 is disposed on a sidewall of the electrical core accommodating case 300, and the second PCB 202 is connected to the first PCB 201. Through the structure, the space between the shell 100 and the battery cell accommodating shell 300 is fully utilized, the space utilization rate is high, and the appearance volume of the lithium ion battery pack is reduced.

Optionally, the sidewall of the electric core accommodating shell 300 is provided with a first connecting plate 301 and a second connecting plate 302, one end of the first connecting plate 301 is connected to the first electrode of the first PCB 201, the other end of the first connecting plate 301 is connected to the second PCB 202, one end of the second connecting plate 302 is connected to the second electrode of the first PCB 201, and the other end of the second connecting plate 302 is connected to the second PCB 202. Through setting up first connecting plate 301 and second connecting plate 302 at the lateral wall that electric core held shell 300, can reduce the space that first connecting plate 301 and second connecting plate 302 occupy, can satisfy the demand that first PCB board 201 and second PCB board 202 are connected moreover. It should be noted that, the first PCB 201 and the second PCB 202 may be connected by, but not limited to, the first connecting board 301 and the second connecting board 302, and in other embodiments, the first PCB 201 and the second PCB 202 may also be connected by wires or other conductive structures.

In a specific embodiment, the second PCB 202 has a first fastening hole 2021 and a second fastening hole 2022, the other end of the first connecting board 301 has a first fastening portion 3011, the other end of the second connecting board 302 has a second fastening portion 3021, the first fastening portion 3011 is fastened to the first fastening hole 2021, and the second fastening portion 3021 is fastened to the second fastening hole 2022. By arranging the first clamping portion 3011 and the first clamping hole 2021, the first connecting plate 301 and the second PCB 202 can be clamped, and the first connecting plate 301 and the second PCB 202 can be conveniently disassembled and assembled; through setting up second joint portion 3021 and second joint hole 2022, can realize second connecting plate 302 and second PCB board 202 joint, be convenient for to second connecting plate 302 and second PCB board 202 dismouting.

Optionally, in this embodiment, a first buckle 303 is disposed on a side wall of the battery cell accommodating case 300, and the first buckle 303 is clamped with the second PCB 202. Through setting up first buckle 303, can fix second PCB board 202 at the lateral wall that electric core held shell 300, easy dismounting can avoid second PCB board 202 to drop from the lateral wall that electric core held shell 300 moreover, has guaranteed second PCB board 202's life. The number of the first hooks 303 may be plural, so as to ensure a limiting effect on the second PCB 202.

Further, a second threaded hole 304 is formed in a side wall of the battery cell accommodating case 300, a second through hole 2023 is formed in the second PCB 202, and a second screw 2024 penetrates through the second through hole 2023 and is in threaded connection with the second threaded hole 304. Through above-mentioned structure, can improve the spacing effect to second PCB board 202, fix second PCB board 202 at the lateral wall that electric core held shell 300 with first buckle 303 jointly moreover, the steadiness of second PCB board 202 is promoted.

Optionally, in this embodiment, the battery cell accommodating cover 400 is provided with a second buckle 402, the battery cell accommodating case 300 is provided with a protruding portion 305, and the second buckle 402 is clamped with the protruding portion 305. Through setting up second buckle 402 and bellying 305, when holding lid 400 setting at electric core and holding shell 300 with electric core, second buckle 402 card goes into bellying 305, can avoid electric core to hold lid 400 and hold shell 300 from electric core and drop, has guaranteed that electric core holds the stability of lid 400, is convenient for hold lid 400 to electric core moreover and carries out the dismouting.

In a specific embodiment, a first threaded hole 401 is formed in an end of the battery cell accommodating cover 400 away from the battery cell accommodating case 300, a first through hole 2011 is formed in the first PCB 201, and the first screw 2012 penetrates through the first through hole 2011 to be in threaded connection with the first threaded hole 401. Through the structure, the limiting effect on the first PCB 201 can be improved, the first PCB 201 is fixed at one end of the battery cell accommodating cover 400 deviating from the battery cell accommodating shell 300, and the stability of the first PCB 201 is improved.

In order to avoid collision of the square lithium ion cell 500, a plurality of buffering pads 502 are arranged in the cell accommodating shell 300, the buffering pads 502 are arranged at intervals, and at least one square lithium ion cell 500 is clamped between two adjacent buffering pads 502. Through setting up blotter 502, can take place to collide with or square lithium ion cell 500 takes place to collide with the lateral wall that the shell 300 was held to the square lithium ion cell 500 shock attenuation, avoid taking place to collide with between the square lithium ion cell 500 or square lithium ion cell 500 and electric core, effectively prevent square lithium ion cell 500 damage and take place the spontaneous combustion, guaranteed square lithium ion cell 500's life, improved the security of lithium ion battery package. Preferably, the buffer pad 502 may be, but is not limited to, a termination tape or an insulating rubber, and can insulate the square lithium ion battery cells 500 while ensuring a shock absorbing function.

The case 100 in this embodiment includes a battery pack upper cover 101 and a battery pack lower cover 102, and the battery pack upper cover 101 is provided at the open end of the battery pack lower cover 102. Through setting up battery package upper cover 101 and battery package inferior valve 102, be convenient for dismouting casing 100 makes things convenient for the staff to maintain lithium ion battery package moreover, labour saving and time saving.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a lithium ion battery pack, its characterized in that, holds shell (300), electric core and holds lid (400) and a plurality of square lithium ion battery cell (500) including casing (100), PCB board subassembly (200), electric core, PCB board subassembly (200) and electric core holds shell (300) and sets up in casing (100), electric core holds lid (400) and sets up the open end that electric core held shell (300), and is a plurality of square lithium ion battery cell (500) range upon range of the setting in proper order in electric core holds in shell (300), utmost point ear (501) of square lithium ion battery cell (500) pass electric core hold lid (400) with PCB board subassembly (200) is connected.

2. The lithium ion battery pack of claim 1, wherein the PCB board assembly (200) comprises a first PCB board (201) and a second PCB board (202), the first PCB board (201) is disposed at an end of the cell accommodating cover (400) facing away from the cell accommodating case (300), the second PCB board (202) is disposed on a side wall of the cell accommodating case (300), the tab (501) is connected with the first PCB board (201), and the first PCB board (201) is connected with the second PCB board (202).

3. The lithium ion battery pack according to claim 2, wherein the side wall of the cell accommodating case (300) is provided with a first connecting plate (301) and a second connecting plate (302), one end of the first connecting plate (301) is connected with the first electrode of the first PCB (201), the other end of the first connecting plate is connected with the second PCB (202), one end of the second connecting plate (302) is connected with the second electrode of the first PCB (201), and the other end of the second connecting plate is connected with the second PCB (202).

4. The lithium ion battery pack according to claim 3, wherein the second PCB (202) is provided with a first clamping hole (2021) and a second clamping hole (2022), the other end of the first connecting plate (301) is provided with a first clamping portion (3011), the first clamping portion (3011) is clamped with the first clamping hole (2021), the other end of the second connecting plate (302) is provided with a second clamping portion (3021), and the second clamping portion (3021) is clamped with the second clamping hole (2022).

5. The lithium ion battery pack of claim 2, wherein a side wall of the cell accommodating case (300) is provided with a first snap (303), and the first snap (303) is snapped with the second PCB board (202).

6. The lithium ion battery pack according to claim 2, wherein a first threaded hole (401) is formed in an end of the cell accommodating cover (400) facing away from the cell accommodating case (300), a first through hole (2011) is formed in the first PCB (201), and a first screw (2012) penetrates through the first through hole (2011) to be in threaded connection with the first threaded hole (401).

7. The lithium ion battery pack according to claim 2, wherein a second threaded hole (304) is formed in a side wall of the cell accommodating case (300), a second through hole (2023) is formed in the second PCB board (202), and a second screw (2024) passes through the second through hole (2023) and is in threaded connection with the second threaded hole (304).

8. The lithium ion battery pack of claim 1, wherein the cell housing cover (400) is provided with a second snap (402), the side wall of the cell housing shell (300) is provided with a boss (305), and the second snap (402) is snapped with the boss (305).

9. The lithium ion battery pack of claim 1, wherein a plurality of buffer pads (502) are disposed in the cell accommodating case (300), the plurality of buffer pads (502) are spaced apart from each other, and at least one square lithium ion cell (500) is sandwiched between two adjacent buffer pads (502).

10. The lithium ion battery pack according to any one of claims 1 to 9, wherein the case (100) comprises a battery pack upper cover (101) and a battery pack lower cover (102), and the battery pack upper cover (101) is disposed at an open end of the battery pack lower cover (102).