CN219321535U

CN219321535U - Battery pack with high energy density

Info

Publication number: CN219321535U
Application number: CN202320776077.2U
Authority: CN
Inventors: 欧阳桂荣; 肖利隆; 肖文杰
Original assignee: Shenzhen Honcell Energy Co ltd
Current assignee: Shenzhen Honcell Energy Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-07-07
Anticipated expiration: 2033-04-11

Abstract

The utility model discloses a battery pack with high energy density, which comprises an upper cover and a lower frame, wherein the upper cover and the lower frame are buckled and formed, the lower frame comprises a frame body and a lower bottom, a battery core accommodating cavity is formed by buckling the upper cover and the lower frame, a first positioning boss is arranged on the edge of the inner wall of the upper cover in a downward protruding mode, a first positioning groove is arranged in a concave mode, a first alignment groove matched with the first positioning boss and a first alignment boss corresponding to the first positioning groove are respectively arranged on the frame body of the lower frame, and buckling and forming are realized by the upper cover and the lower frame through the first positioning boss, the first positioning groove, the first alignment groove and the first alignment boss. The battery pack with high energy density has the characteristics of good fixing effect, high energy density and convenient operation.

Description

Battery pack with high energy density

Technical Field

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

Background

In a lithium ion battery, in order to effectively fix a battery cell in an inner cavity, a frame body and steel plates respectively arranged at the upper side and the lower side of the frame body are generally adopted for injection molding. Aiming at the complexity of operation in an injection molding mode, chinese patent No. 217955980U discloses a lithium ion battery pack with high energy density, which comprises an electric core, wherein the surface of the electric core is attached with a label, two ends of the electric core are respectively provided with a fixing block which is integrally adhered with the electric core through the label, and the fixing blocks are provided with fixing holes for fixing the electric core. The lithium ion battery pack with high energy density has the characteristics of high energy density, convenience in assembly, strong applicability and low cost.

However, the utility model adopts a labeling mode to carry out adhesion fixation, the fixation effect of the utility model has loose risk, the position fluctuation exists in the use process, and the labeling occupies the inner cavity space to influence the improvement of energy density.

Disclosure of Invention

The utility model aims to provide a battery pack with high energy density, which has the characteristics of good fixing effect, high energy density and convenient operation.

The utility model can be realized by the following technical scheme:

the utility model discloses a battery pack with high energy density, which comprises an upper cover and a lower frame, wherein the upper cover and the lower frame are buckled and formed, the lower frame comprises a frame body and a lower bottom, a battery core accommodating cavity is formed by buckling the upper cover and the lower frame, a first positioning boss is arranged on the edge of the inner wall of the upper cover in a downward protruding mode, a first positioning groove is arranged in a concave mode, a first alignment groove matched with the first positioning boss and a first alignment boss corresponding to the first positioning groove are respectively arranged on the frame body of the lower frame, and buckling and forming are realized by the upper cover and the lower frame through the first positioning boss, the first positioning groove, the first alignment groove and the first alignment boss.

Further, the first positioning boss is arranged on the three walls of the four walls of the upper cover, the first positioning groove is arranged on the other wall of the four walls of the upper cover, different alignment structures are formed, dislocation during buckling is avoided, and accuracy of an alignment process is guaranteed.

Further, the transparent window area is arranged in the upper cover, the attractiveness of the battery pack is improved, and the display screen is convenient to set.

Further, the inner wall of the lower bottom is provided with a plurality of battery cell fixing grooves, and the battery cell fixing grooves are movably provided with a plurality of cylindrical lithium ion battery cells. Through setting up electric core fixed slot, form better electric core bearing structure, avoid undulant skew that causes electric core position, have better reliability in use.

Furthermore, the cylindrical lithium ion battery cells are electrically conducted in a serial or parallel connection mode, and can be flexibly selected according to actual requirements.

Further, the cylindrical lithium ion battery cells are 18650, 26650, 26700 and 14500 cylindrical battery cells, so that the space of the accommodating cavity is fully utilized, and the energy density of the battery pack is improved.

Further, the lower frame is a PE plastic shell, a PP plastic shell, a PVC plastic shell, a PET plastic shell, a PS plastic shell or an ABS plastic shell, and the injection molding is convenient and the cost is low.

Further, the upper cover is a PE plate body, a PP plate body, a PVC plate body, a PET plate body, a PS plate body or an ABS plate body, and the injection molding is convenient and the cost is low.

Further, the number of the first positioning bosses is a plurality of, and the first positioning bosses are uniformly arranged at intervals, so that the structure is attractive, and the stress uniformity of the connecting points is good.

Further, the number of the first positioning grooves is a plurality of, and the plurality of first positioning grooves are arranged at intervals.

The battery pack with high energy density has the following beneficial effects:

the first and the fixing effects are good, the upper cover and the lower frame body are fixedly connected by adopting concave-convex coordination structures such as the first positioning boss, the first positioning groove, the first alignment boss and the like, and uniform structure connection points are formed at the edge of the battery pack, so that the connection is firm;

the second, the energy density is high, first location boss, first location recess, first alignment boss etc. are all located the outer edge of group battery, need not to squeeze up the volume of the internal electric core accommodation cavity, can fully utilize the electric core accommodation cavity to reload the electric core of the greater capacity, form the possibility for promoting the energy density of the group battery;

third, the simple operation, first location boss, first location recess, first counterpoint boss form the cooperation structure of two liang of counterpoints, and it is accurate that it is blocked into counterpoint, and visual operation can realize its assembly process.

Drawings

FIGS. 1-2 are schematic views showing an exploded structure of a battery pack having a high energy density according to the present utility model;

FIG. 3 is a schematic view of the internal structure of a lower frame of the battery pack with high energy density according to the present utility model;

the labels in the drawings include: 100. an upper cover; 101. a first positioning boss; 102. a first positioning groove; 103. a transparent window area; 200. a battery cell; 300. A lower frame; 310. a frame; 320. a lower bottom; 301. a first alignment groove; 302. a first alignment boss; 303. and a cell fixing groove.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the following further details of the present utility model will be described with reference to examples and drawings.

As shown in fig. 1 to 3, the utility model discloses a battery pack with high energy density, which comprises an upper cover 100 and a lower frame 300 which are buckled and formed up and down, wherein the lower frame 300 comprises a frame body 310 and a lower bottom 320, the upper cover 100 and the lower frame 300 are buckled and form a battery cell accommodating cavity, a first positioning boss 101 is arranged on the edge of the inner wall of the upper cover 100 in a downward protruding mode, a first positioning groove 102 is arranged in a concave mode, a first alignment groove 301 matched with the first positioning boss 101 and a first alignment boss 302 corresponding to the first positioning groove 102 are respectively arranged on the frame body 310 of the lower frame 300, and buckling and forming are realized on the upper cover and the lower frame through the first positioning boss 101, the first positioning groove 102, the first alignment groove 301 and the first alignment boss 302.

As shown in fig. 1 to 3, the first positioning boss 101 is provided on three of four walls of the upper cover, and the first positioning groove 102 is provided on the other of the four walls of the upper cover. A transparent window area 103 is provided inside the upper cover 100.

As shown in fig. 3, a plurality of battery cell fixing grooves 303 are formed in the inner wall of the lower bottom 320, and a plurality of cylindrical lithium ion battery cells 200 are movably arranged in the battery cell fixing grooves 303.

In the electric core conduction mode, the cylindrical lithium ion battery core is electrically conducted in a serial or parallel mode, and the cylindrical lithium ion battery has good use flexibility.

To meet the needs of different applications, cylindrical lithium ion battery cells are 18650, 26650, 26700, 14500 cylindrical cells.

In order to effectively reduce the process cost, the lower frame is a PE plastic shell, a PP plastic shell, a PVC plastic shell, a PET plastic shell, a PS plastic shell or an ABS plastic shell. The upper cover is a PE plate body, a PP plate body, a PVC plate body, a PET plate body, a PS plate body or an ABS plate body.

In structural design, in order to guarantee firm and the homogeneity of connection, first location boss quantity is a plurality of, and a plurality of first location boss even interval sets up. The first positioning grooves are arranged at intervals.

In the description of the present utility model, it should be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements 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.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing examples are merely exemplary embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and that these obvious alternatives fall within the scope of the utility model.

Claims

1. The utility model provides a group battery that energy density is high, includes upper cover and the lower frame of lock shaping from top to bottom, the lower frame includes framework and lower end, upper cover and lower frame lock form electric core and hold the chamber, its characterized in that: the inner wall edge of upper cover is protruding to be provided with first location boss and indent and is provided with first location recess, the lower frame is equipped with respectively on its framework with first location boss complex first counterpoint recess and with first location recess corresponding first counterpoint boss, upper cover and lower frame pass through first location boss, first location recess, first counterpoint boss realization lock shaping.

2. The high energy density battery of claim 1, wherein: the first positioning boss is arranged on three walls of four walls of the upper cover, and the first positioning groove is arranged on the other wall of the four walls of the upper cover.

3. The high energy density battery of claim 2, wherein: and a transparent window area is arranged in the upper cover.

4. A high energy density battery according to claim 3, wherein: the inner wall of the lower bottom is provided with a plurality of battery cell fixing grooves, and the battery cell fixing grooves are movably provided with a plurality of cylindrical lithium ion battery cells.

5. The high energy density battery of claim 4, wherein: the cylindrical lithium ion battery cells are electrically conducted in a serial or parallel mode.

6. The high energy density battery of claim 5, wherein: the cylindrical lithium ion battery cells are 18650, 26650, 26700 and 14500 cylindrical battery cells.

7. The high energy density battery of claim 6, wherein: the lower frame is a PE plastic shell, a PP plastic shell, a PVC plastic shell, a PET plastic shell, a PS plastic shell or an ABS plastic shell.

8. The high energy density battery of claim 7, wherein: the upper cover is a PE plate body, a PP plate body, a PVC plate body, a PET plate body, a PS plate body or an ABS plate body.

9. The high energy density battery of claim 8, wherein: the number of the first positioning bosses is a plurality of, and the first positioning bosses are uniformly arranged at intervals.

10. The high energy density battery of claim 9, wherein: the number of the first positioning grooves is a plurality of, and the first positioning grooves are arranged at intervals.