CN212725478U

CN212725478U - Lithium ion battery with multistage strengthening mechanism

Info

Publication number: CN212725478U
Application number: CN202022080635.0U
Authority: CN
Inventors: 杨泽州; 陈洲宇
Original assignee: Dongguan Zhongzhun Energy Technology Co ltd
Current assignee: Dongguan Zhongzhun Energy Technology Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-03-16
Anticipated expiration: 2030-09-21

Abstract

The utility model discloses a lithium ion battery of multistage strengthening mechanism, which comprises a lithium ion battery body and a strengthening component, wherein the lithium ion battery body comprises a battery pack and a battery shell, the strengthening component comprises a clapboard, a plug plate and a positioning pin, four groups of clamping strips are symmetrically arranged on one side of the clapboard, the battery pack is fixedly clamped between the four groups of clamping strips, the plug plate is arranged between two adjacent groups of the clapboards, the plug plate and the clapboard are fixedly connected through the positioning pin, the battery shell comprises a bottom shell box and a top cover, the top cover is fixedly arranged at the top of the bottom shell box through a bolt, a buffer pressure plate is arranged between the top cover and the battery pack, springs are arranged on the upper surface of the buffer pressure plate in an equidistant array, the battery pack comprises a positive plate, a negative plate and a pole group, grooves are arranged in the clapboard, and the plug plate is arranged in, effectively relieve the local deformation of the internal plane structure of the pole group.

Description

Lithium ion battery with multistage strengthening mechanism

Technical Field

The utility model relates to an ionic cell technical field specifically is a lithium ion battery of mechanism is reinforceed to multistage.

Background

Lithium ion batteries have the advantages of high energy density, low self-discharge rate, high charging efficiency, and the like, and are widely used. The lithium ion battery is a green battery without environmental pollution. The lithium ion battery industry has promoted the development of mobile device industry, provides sufficient, safe, stable power for mobile device, has extremely important meaning to information modernization.

Lithium ion batteries have the advantages of high operating voltage, high energy density, light weight, no pollution and the like, and have been widely applied to the industrial application field and the civil field in recent years. With the rapid development of the lithium ion battery industry, the design cost pressure of the lithium ion battery with the conventional size is rapidly increased. The application field is widened, and personalized and diversified design products such as special function type batteries (ultra-high temperature/low temperature batteries, fast charge batteries and the like), wing-shaped batteries, thin-sheet (wing) shaped large batteries, pocket-sized small batteries, high-capacity and high-power batteries and the like are gradually developed into new profit breakthrough and new market development directions of various lithium ion battery manufacturers.

The thin-sheet-shaped large-lamination soft-package lithium ion battery has the characteristics of high energy, high safety, good heat dissipation and strong shape plasticity, and has a very wide application field. For the prior art, the design difficulty of the sheet-shaped large-lamination soft package lithium ion battery lies in that the plane structure of a sheet battery pole group has poor supporting strength, and an inner diaphragm or a pole piece of the pole group is easy to bend and uneven locally to generate a local gap inside the pole group, so that the appearance of the battery is influenced, and more seriously, in the charging and discharging use process of the battery, a negative pole piece near the gap inside the pole group can generate a dead zone and precipitate lithium, so that the electrical property and the safety performance of the battery are influenced. The strengthening of the plane structure of the pole group is the key for ensuring the reliability of the thin-sheet-shaped large-lamination soft package battery. Because there is certain space between soft packet of lithium ion battery's utmost point group and the outer casing, the local deformation of utmost point internal plane structure is all very difficult to eliminate to the simple reinforced battery casing or add reinforced structure outside the casing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multistage lithium ion battery who strengthens mechanism sets up the baffle between group battery and battery case to utilize the jam plate additional strengthening stability, set up the buffering clamp plate that has the spring between casing top cap and drain pan case, alleviate the local deformation of utmost point internal plane structure of group, with the problem of proposing in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a lithium ion battery of a multistage strengthening mechanism comprises a lithium ion battery body and a strengthening assembly, wherein the lithium ion battery body comprises a battery pack and a battery shell, the strengthening assembly comprises a partition plate, a plug plate and a positioning pin, four groups of clamping strips are symmetrically arranged on one side of the partition plate, the battery pack is fixedly clamped between the four groups of clamping strips, the plug plate is arranged between two adjacent groups of partition plates, and the plug plate and the partition plates are fixedly connected through the positioning pin;

the battery shell comprises a bottom shell box and a top cover, the top cover is fixedly installed at the top of the bottom shell box through bolts, a buffering pressing plate is arranged between the top cover and the battery pack, and springs are arranged on the upper surface of the buffering pressing plate in an equidistant mode.

Preferably, the battery pack includes a positive electrode tab, a negative electrode tab, and a pole group.

Preferably, the partition plates are all provided with grooves, and the plug plates are arranged in a copper mesh sheet or foil plate structure.

Preferably, a notch is formed in one side of the battery shell, a fixing plate is inserted in the notch and fixedly connected with one group of partition plates, and a handle is fixedly mounted on one side, located outside the battery shell, of the fixing plate.

Preferably, one end of the spring, which is far away from the buffering pressure plate, is fixedly connected to the lower surface of the top cover.

Preferably, the spring is internally installed in a positioning column in a penetrating manner, and the positioning column is installed inside the top cover in a sliding manner.

Compared with the prior art, the beneficial effects of the utility model are that:

set up the baffle between group battery and battery case to utilize the cock board additional strengthening structural stability, set up the buffering clamp plate that has the spring between casing top cap and drain pan case, alleviate the local deformation of utmost point internal plane structure of group.

Drawings

Fig. 1 is a schematic sectional view of a lithium ion battery of a multi-stage strengthening mechanism according to the present invention;

fig. 2 is a schematic diagram of a top cross-sectional structure of a lithium ion battery of a multi-stage strengthening mechanism according to the present invention;

fig. 3 is the schematic diagram of the sectional structure for installing the partition board of the lithium ion battery of the multistage strengthening mechanism of the present invention.

In the figure: 1. a lithium ion battery body; 2. a reinforcing component; 201. a partition plate; 202. a plug plate; 203. positioning pins; 204. a clamping bar; 3. a battery pack; 301. a positive plate; 302. a negative plate; 303. and a pole group; 4. a battery case; 401. a bottom case; 402. a top cover; 5. a buffer pressing plate; 501. a spring; 6. a groove; 7. a notch; 8. a fixing plate; 9. and a positioning column.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

the utility model provides a multistage lithium ion battery who strengthens mechanism, includes lithium ion battery body 1 and strengthens subassembly 2, lithium ion battery body 1 includes group battery 3 and battery case 4, group battery 3 includes positive plate 301, negative pole piece 302 and utmost point group 303, it includes baffle 201, cock board 202 and locating pin 203 to strengthen subassembly 2, baffle 201 one side symmetry is provided with four group's centre gripping strips 204, the fixed centre gripping of group battery 3 is adjacent two sets of between four group's centre gripping strips 204 be provided with cock board 202 between the baffle 201, cock board 202 and baffle 201 pass through locating pin 203 fixed connection, all set up fluted 6 in the baffle 201, cock board 202 is copper mesh piece or copper foil plate structure and sets up, sets up copper mesh piece or copper foil plate structure, and chemical stability is good in its electrolyte, heat-transfer capacity is strong.

The battery shell 4 comprises a bottom shell box 401 and a top cover 402, the top cover 402 is fixedly installed at the top of the bottom shell box 401 through bolts, a buffer pressing plate 5 is arranged between the top cover 402 and the battery pack 3, springs 501 are arranged on the upper surface of the buffer pressing plate 5 in an equidistant array mode, one end, far away from the buffer pressing plate 5, of each spring 501 is fixedly connected to the lower surface of the top cover 402, each spring 501 is installed in a positioning column 9 in a penetrating mode, and each positioning column 9 is arranged to prevent the spring 501 from deforming after being compressed; the positioning column 9 is slidably mounted inside the top cover 402, so that the stability of the positioning column 9 in use is improved.

The breach 7 has been seted up to battery case 4 one side, it has fixed plate 8 to peg graft in the breach 7, fixed plate 8 and one of them a set of baffle 201 fixed connection, fixed plate 8 is located the outside one side fixed mounting of battery case 4 and has the handle, sets up a set of fixed plate 8 that can twitch, dismantles the in-process at whole lithium ion battery body 1, can easily pull out group battery 3.

The structure principle is as follows: the separator 201 is arranged between the battery pack 3 and the battery shell 4, and the plug plate 202 is filled between the adjacent separators 201 to enhance the structural stability, in this instance, the plug plate 202 with a copper mesh sheet or copper foil plate structure can be selected, and the electrolyte has good chemical stability and strong heat conduction capability;

set up the buffering clamp plate 5 that has spring 501 between casing top cap 402 and drain pan 401, during the use, set up reference column 9 in spring 501 inside, prevent to produce deformation after spring 501 compresses, make reference column 9 slidable mounting inside top cap 402 to improve reference column 9 in use's stability, whole buffering clamp plate 5 effectively must alleviate the local deformation of utmost point internal plane structure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a lithium ion battery of multistage strengthening mechanism, includes lithium ion battery body (1) and strengthens subassembly (2), its characterized in that: the lithium ion battery body (1) comprises a battery pack (3) and a battery shell (4), the reinforcing assembly (2) comprises a partition plate (201), a plug plate (202) and a positioning pin (203), four groups of clamping strips (204) are symmetrically arranged on one side of the partition plate (201), the battery pack (3) is fixedly clamped between the four groups of clamping strips (204), the plug plate (202) is arranged between two adjacent groups of partition plates (201), and the plug plate (202) is fixedly connected with the partition plate (201) through the positioning pin (203);

the battery shell (4) comprises a bottom shell box (401) and a top cover (402), the top cover (402) is fixedly installed at the top of the bottom shell box (401) through bolts, a buffer pressing plate (5) is arranged between the top cover (402) and the battery pack (3), and springs (501) are arranged on the upper surface of the buffer pressing plate (5) in an equidistant mode.

2. The lithium ion battery of claim 1, wherein: the battery pack (3) comprises a positive plate (301), a negative plate (302) and a pole group (303).

3. The lithium ion battery of claim 1, wherein: all set up recess (6) in baffle (201), cock board (202) are copper mesh piece or the setting of foil plate structure.

4. The lithium ion battery of claim 1, wherein: a notch (7) is formed in one side of the battery shell (4), a fixing plate (8) is inserted in the notch (7), the fixing plate (8) is fixedly connected with one group of partition plates (201), and a handle is fixedly mounted on one side, located outside the battery shell (4), of the fixing plate (8).

5. The lithium ion battery of claim 1, wherein: one end of the spring (501), which is far away from the buffer pressure plate (5), is fixedly connected to the lower surface of the top cover (402).

6. The lithium ion battery of claim 1, wherein: the spring (501) is internally installed in the positioning column (9) in a penetrating mode, and the positioning column (9) is installed inside the top cover (402) in a sliding mode.