CN215342846U

CN215342846U - Lithium battery system

Info

Publication number: CN215342846U
Application number: CN202023275495.9U
Authority: CN
Inventors: 王晟
Original assignee: Jiangsu Qiangjin New Energy Technology Co ltd
Current assignee: Jiangsu Qiangjin New Energy Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-12-28
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a lithium battery system which comprises a box body and at least one group of battery modules contained in the box body, wherein each group of battery modules comprises a module support and a plurality of cylindrical battery cells, each module support comprises a first support, a second support and a plurality of rows of battery cell containing parts positioned between the first support and the second support, each row of battery cell containing parts comprises a plurality of battery cell containing parts, the battery cell containing parts of two rows of battery cell containing parts which are adjacent up and down are arranged in a staggered mode, a cylindrical battery cell is installed in each battery cell containing part, and the plurality of rows of cylindrical battery cells are connected to form a plurality of strings of modules. According to the utility model, the battery pack with corresponding specifications is formed by connecting a plurality of rows of battery cells in series and parallel, the structure is compact, and light weight and universal modularization are realized.

Description

Lithium battery system

Technical Field

The utility model relates to a lithium battery, in particular to a lithium battery system with high space utilization rate and high universality.

Background

Lithium batteries are widely used in various industries, such as pure electric vehicles, hybrid power devices, plug-in hybrid vehicles, ships, rail transportation, solar energy, wind power generation systems, and the like. Especially, with the development of electric automobiles, the requirements for the performance of lithium batteries are higher and higher.

Current lithium battery module structure includes a casing usually, sets up a plurality of electric cores in the casing, and the preparation of prior art electric automobile battery generally adopts the electric core to make up into battery module on the existing market, and battery module is installed again in the battery box. Most of the existing lithium battery modules are bulky and heavy, and the dead weight of the vehicle can be increased due to the large dead weight of the existing lithium battery modules, so that the driving endurance mileage of the vehicle is shortened. Meanwhile, the universality of the battery is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a lithium battery system with high space utilization rate and high universality.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a lithium battery system, includes box and at least a set of battery module, be formed with accommodation space in the box, the battery module hold in the accommodation space, every group the battery module includes module support and a plurality of cylinder electricity core, the module support includes first support, second support and is located the multirow electricity core portion of holding between first support and the second support, multirow electricity core portion of holding distributes from last down, and every row electricity core portion of holding includes a plurality of electricity core portions of holding, and the setting of staggering mutually between the electricity core portion of two rows of adjacent electricity core portions of going up and down installs one in every electricity core portion cylinder electricity core, and the multirow cylinder electricity core is connected and is formed many clusters of modules.

Preferably, each string of modules comprises two rows of cylindrical cells or more than twice the rows of cylindrical cells.

Preferably, every two rows of cylindrical battery cores of each series of modules are connected in parallel.

Preferably, every two rows of cylindrical battery cores of each string of modules are welded through nickel sheets.

Preferably, the battery module includes a first battery module and a second battery module, and the first battery module and the second battery module are connected in series.

Preferably, the positive electrode of the first battery module and the negative electrode of the second battery module, and the negative electrode of the first battery module and the positive electrode of the second battery module are welded by spot welding or bonding wires.

Preferably, the box includes body, upper cover and briquetting, accommodation space form in this is internal, the upper cover lid fits on the body, the briquetting is fixed in this is internal and the top setting of laminating battery module, is fixed in this is internal with battery module pressfitting.

Preferably, the box body further comprises a plurality of reinforcing ribs, and the reinforcing ribs are at least distributed on the periphery of the inner wall of the body.

Preferably, the pressing block at least comprises one pressing part, and each group of battery modules is provided with one pressing part.

Preferably, the thickness of the nickel sheet is not more than 0.2 mm.

The utility model has the beneficial effects that:

1. according to the utility model, a plurality of rows of battery cells are connected in series and in parallel to form the battery pack with corresponding specification, the structure is compact, and light weight and universal modularization are realized.

2. The utility model uses the pressing block to press the limiting battery module in the box body, thereby realizing better utilization of the space of the box body.

Drawings

Fig. 1 is a schematic view of the overall structure of a battery of the present invention;

fig. 2 is an exploded view of the battery of the present invention;

FIG. 3 is a schematic view of an exploded structure of the case of the present invention;

fig. 4 is a schematic diagram of a cell connection structure of the battery module according to the present invention.

Reference numerals: 10. the box, 11, the body, 12, the upper cover, 13, the strengthening rib, 14, the briquetting, 141, first nip portion, 142, second nip portion, 15, accommodation space, 16, hold the chamber, 21, the module support, 211, first support, 212, second support, 213, electric core accommodation portion, 22, cylinder electricity core, 23, the nickel piece, 20, first battery module, 30, the second battery module.

Detailed Description

The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

According to the lithium battery system disclosed by the utility model, the battery packs with corresponding specifications are formed by connecting a plurality of rows of battery cells in series and parallel, the structure is compact, the light weight and the universal modularization are realized, and the quick battery replacement of a shared bicycle can be realized.

Referring to fig. 1 and 2, a lithium battery system, specifically a lithium iron phosphate battery system, disclosed by the present invention includes a case 10, a first battery module 20 and a second battery module 30, wherein the first battery module 20 and the second battery module 30 are both disposed in the case 10, and the first battery module 20 and the second battery module 30 are connected in series to form a battery pack with a corresponding specification. The present invention is not limited to the number of battery modules, and at least one battery module is disposed in the case 10.

In this embodiment, as shown in fig. 2 and fig. 4, each of the first battery module 20 and the second battery module 30 includes a module support 21 and a plurality of cylindrical battery cells 22, wherein the module support 21 specifically includes a first support 211, a second support 212 and a plurality of rows of battery cell accommodating portions 213 located between the first support 211 and the second support 212, the plurality of rows of battery cell accommodating portions 213 are distributed from top to bottom (i.e., in the height direction) in the case 10, each row of battery cell accommodating portions 213 includes a plurality of battery cell accommodating portions 213 arranged along the front-back direction of the case 10 in an extending manner, preferably, the battery cell accommodating portions of two adjacent rows of battery cell accommodating portions 213 are arranged in a staggered manner, and the case space can be compressed.

Install a cylinder electricity core 22 in every electric core portion 213, and multirow cylinder electricity core 22 connects and forms many strings of modules, and every string of module includes two rows of cylinder electricity cores 22 or two rows of cylinder electricity cores 22 of more than twice, and every two rows of cylinder electricity cores 22 of every string of module are parallelly connected in parallel, and concrete accessible nickel piece 23 welding (like spot welding), the thickness of nickel piece 23 is not more than 0.2 mm. In this embodiment, the positive electrode of the first battery module 20 and the negative electrode of the second battery module 30, and the negative electrode of the first battery module 20 and the positive electrode of the second battery module 30 are welded by spot welding or bonding wire. The first battery module 20 and the second battery module 30 have different numbers of modules, for example, the first battery module 20 includes 8 strings of modules, and the second battery module 30 includes 7 strings of modules, so that the heights of the two sets of battery modules are different. Of course, the number of the first battery module 20 and the second battery module 30 may be the same, and the number of the modules is not limited, and may be expanded as needed.

In this embodiment, as shown in fig. 3, the box 10 specifically includes a body 11, an upper cover 12, a plurality of reinforcing ribs 13, and a pressing block 14, where the body 11 is a rectangular parallelepiped structure with an open top, an accommodating space 15 for accommodating the first battery module 20 and the second battery module 30 is formed in the body, and the upper cover 12 is fixed on the top of the body 11 in a covering manner. The inner wall of body 11 is respectively spacing to be provided with a strengthening rib 13 all around, and the middle part of body 11 still sets up a strengthening rib 13, is divided into two with the accommodation space of body 11, divide into two and hold chamber 16, and every holds and holds a set of battery module in the chamber 16. The pressing block 14 is fixed in the body 11 and attached to the top of the battery module, and presses and fixes the battery module in the body 11. In this embodiment, the pressing block 14 includes a first pressing portion 141 and a second pressing portion 142, the first pressing portion 141 is pressed and fixed on the first battery module 20, and the second pressing portion 142 is pressed and fixed on the second battery module 30, because there is a height difference between the first battery module 20 and the second battery module 30, the first pressing portion 141 and the second pressing portion 142 are correspondingly stepped. The battery module is fixed through the pressing block 14, so that the space utilization rate in the body 11 can be optimized, and the battery is lighter.

Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.

Claims

1. The utility model provides a lithium battery system, a serial communication port, lithium battery system includes box and at least a set of battery module, be formed with accommodation space in the box, the battery module hold in accommodation space, every group the battery module includes module support and a plurality of cylinder electricity core, the module support includes first support, second support and is located the multirow electricity core portion of holding between first support and the second support, multirow electricity core portion of holding is from last down distributing, and every row of electricity core portion of holding includes a plurality of electricity core portions of holding, and the setting of staggering mutually between the electricity core portion of two rows of adjacent electricity core portions of holding from top to bottom installs one in every electricity core portion of holding cylinder electricity core, and the multirow cylinder electricity core is connected and is formed many clusters of modules.

2. The lithium battery system of claim 1, wherein each string of modules comprises two rows of cylindrical cells or more than twice the number of rows of cylindrical cells.

3. The lithium battery system of claim 2, wherein each two rows of cylindrical cells of each series of modules are connected in parallel.

4. The lithium battery system of claim 3, wherein each two rows of cylindrical cells of each string of modules are welded by nickel sheets.

5. The lithium battery system as claimed in claim 1, wherein the battery modules comprise a first battery module and a second battery module, and the first battery module and the second battery module are connected in series.

6. The lithium battery system as claimed in claim 5, wherein the positive electrode of the first battery module and the negative electrode of the second battery module, and the negative electrode of the first battery module and the positive electrode of the second battery module are welded by spot welding or wire welding.

7. The lithium battery system as claimed in claim 1, wherein the box body comprises a body, an upper cover and a pressing block, the accommodating space is formed in the body, the upper cover covers the body, the pressing block is fixed in the body and attached to the top of the battery module, and the battery module is fixed in the body in a pressing manner.

8. The lithium battery system as claimed in claim 7, wherein the case further comprises a plurality of ribs, and the ribs are distributed at least around the inner wall of the case.

9. The lithium battery system as claimed in claim 7, wherein the pressing block comprises at least one pressing portion, and one pressing portion is disposed on each battery module.

10. A lithium battery system according to claim 4, characterized in that the thickness of the nickel sheet is not more than 0.2 mm.