CN216597724U

CN216597724U - Unit module and battery pack

Info

Publication number: CN216597724U
Application number: CN202122507576.5U
Authority: CN
Inventors: 洪秀玉; 范明聪
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-05-24
Anticipated expiration: 2031-10-18

Abstract

The utility model relates to the field of power batteries, and discloses a unit module and a battery pack. The cell module comprises a cell module and a shell, wherein two ends of the cell module are respectively and electrically connected with a pole, and the pole extends along the height direction of the cell module; the interior of the shell is provided with a containing cavity, the shell is provided with heat dissipation holes, and the pole extends out of the shell. The battery pack includes a plurality of the above unit modules connected in parallel. The end part of the pole of the utility model extends out through the top of the shell, the heat dissipation hole is arranged at the top of the shell, when the battery core is out of control thermally, the out-of-control thermally gas is discharged upwards through the heat dissipation hole and the pole, and then the hot gas is led out from the top of the shell, thereby avoiding the phenomenon of thermal spreading caused by the high-temperature gas of the out-of-control thermally monomer being sprayed to a normal module, prolonging the time of thermal spreading, increasing the use safety, and the pole is arranged at the top of the shell, being beneficial to realizing the forward welding when the busbar between the unit modules is bridged, and greatly improving the automatic production efficiency.

Description

Unit module and battery pack

Technical Field

The utility model relates to the field of power batteries, in particular to a unit module and a battery pack.

Background

With the increasing environmental and energy problems in recent years, new energy electric vehicles gradually come into the field of view, and lithium ion power batteries have also received wide attention as the main power source of new energy vehicles. Wherein, the power unit module is the most important component part in the power battery package, and the inside of the casing of unit module is equipped with a plurality of electric cores of arranging side by side, and the tip of electric core is equipped with utmost point post, connects through the busbar between the utmost point post of a plurality of unit modules.

The pole of the traditional unit module is arranged at the end plate position in the length direction of the battery cell, and once a certain battery cell of the unit module is out of control due to heat, the pole position can become one of the channels for discharging high-temperature gas and is directly sprayed onto the adjacent battery modules, so that the adverse effects such as rapid heat spread are caused; in addition, the terminal is arranged at the end part of the unit module, which is not beneficial to the on-line welding of the serial bus bar.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a unit module and a battery pack.

The present invention provides a unit module, which includes:

the battery cell module is characterized in that two ends of the battery cell module in the length direction are respectively and electrically connected with a pole column, and the pole column extends along the height direction of the battery cell module; and

the casing, the chamber that holds that the casing internal formation is used for holding electric core module, and the casing is equipped with in the ascending one side of direction of height of electric core module and communicates the chamber that will hold to outside louvre, and utmost point post extends to outside the casing.

Preferably, the pole is mounted on the housing by means of a mounting bracket, the end of the pole facing the outside of the housing protruding out of the mounting bracket.

Preferably, the housing includes a top cover detachably disposed, and both ends of the top cover are respectively provided with mounting holes for mounting the mounting frame.

Preferably, the top cover comprises a top plate and mounting plates respectively arranged on two sides of the top plate, the top plate and the two mounting plates form a convex structure, and the two mounting holes are respectively arranged on the two mounting plates.

Preferably, the plurality of heat dissipation holes are all arranged on the top cover.

Preferably, the battery cell module comprises a plurality of battery cells connected in parallel, tabs are respectively led out from two ends of each battery cell, and a plurality of tabs led out from the same side are electrically connected with a pole through a busbar.

Preferably, the end of the pole is provided with a connecting plate for electrical connection with the busbar, the connecting plate having a diameter greater than the diameter of the pole.

Preferably, a bus bar support for mounting the bus bar is arranged in the shell, and the tab is arranged on the bus bar support.

Preferably, an insulating plate is provided between the bus bar and the end plate of the case.

The utility model also provides a battery pack which comprises a plurality of the unit modules connected in parallel.

Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:

the end part of the pole of the utility model extends out through the top of the shell, the heat dissipation hole is arranged at the top of the shell, when the battery core is out of control thermally, the out-of-control thermally gas is discharged upwards through the heat dissipation hole and the pole, and then the hot gas is led out from the top of the shell, thereby avoiding the phenomenon of thermal spreading caused by the high-temperature gas of the out-of-control thermally monomer being sprayed to a normal module, prolonging the time of thermal spreading, increasing the use safety, and the pole is arranged at the top of the shell, being beneficial to realizing the forward welding when the busbar between the unit modules is bridged, and greatly improving the automatic production efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic view of a unit module according to an embodiment of the present invention;

fig. 2 is a sectional view of a unit module according to an embodiment of the present invention.

Description of the reference numerals

1. A housing; 2. a pole column; 21. a connecting plate; 3. a mounting frame; 4. a top cover; 41. a top plate; 42. mounting a plate; 43. heat dissipation holes; 5. an electric core; 51. a tab; 6. a bus bar; 7. a busbar support; 8. an insulating plate.

Detailed Description

In order that the above objects, features and advantages of the present invention may be more clearly understood, a solution of the present invention will be further described below. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein; it is to be understood that the embodiments described in the specification are only a part of the embodiments of the present invention, and not all of them.

As shown in fig. 1 and fig. 2, a unit module provided in an embodiment of the present invention includes a cell module and a casing 1, where the casing 1 preferably adopts an aluminum casing, two ends of the cell module in a length direction are electrically connected to terminals 2, respectively, the length direction of the cell module is an X direction in fig. 1, the terminals 2 extend along a height direction of the cell module, that is, the terminals 2 are disposed along a vertical direction, so that the disposition direction of the terminals 2 is perpendicular to the length direction of the cell module, and the height direction of the cell module is a Z direction in fig. 1. Form the chamber that holds that is used for holding electric core module in the casing 1, casing 1 is equipped with in the ascending one side of direction of height of electric core module and communicates to outside louvre 43 with holding the chamber, and utmost point post 2 extends to outside the casing 1, and partial utmost point post 2 stretches out the top of casing 1 promptly for draw forth the electric current of electric core module, and then make and communicate between the adjacent two sets of unit modules, wherein, can establish ties between the adjacent two sets of unit modules and also can connect in parallel.

According to the utility model, the end part of the pole 2 extends out of the top of the shell 1, the heat dissipation hole 43 is arranged at the top of the shell 1, when the battery cell 5 is out of control thermally, the out-of-control thermally-generated gas is discharged upwards through the heat dissipation hole 43 and the pole 2, and then the hot gas is led out from the top of the shell 1, so that the phenomenon of thermal spread caused by the high-temperature gas of the out-of-control thermally-generated monomer being sprayed to a normal module is avoided, the thermal spread generation time is prolonged, the use safety is increased, and the pole 2 is arranged at the top of the shell 1, so that the forward welding during busbar bridging among unit modules is favorably realized, and the automatic production efficiency is greatly improved.

As shown in fig. 2, the terminal 2 is mounted on the casing 1 through the mounting frame 3, and one end of the terminal 2 facing the outside of the casing 1 extends out of the mounting frame 3, so as to draw out the current of the battery cell module, and further optimally, one end of the terminal 2 facing the inside of the casing 1 also extends out of the mounting frame 3, i.e. the terminal 2 is arranged on the mounting frame 3 in a penetrating manner, so that one end of the terminal 2 can be connected with the battery cell module inside the casing 1, and the other end is connected with the bridging busbar. The middle part of mounting bracket 3 is equipped with the through-hole, and utmost point post 2 wears to establish in the through-hole, and is preferred, and utmost point post 2 can constitute integrative piece with mounting bracket 3, increases the installation effect, ensures the fastness of connecting.

The housing 1 includes a top cover 4 detachably provided, and both ends of the top cover 4 are respectively provided with mounting holes for mounting the mounting frame 3. Specifically, as shown in fig. 1 and fig. 2, the top cover 4 includes a top plate 41 and mounting plates 42 respectively disposed on two sides of the top plate 41, the top plate 41 and the two mounting plates 42 form a convex structure, and the two mounting holes are respectively disposed on the two mounting plates 42, so that one end of the terminal 2 protruding out of the housing 1 is located in a groove formed by the top plate 41 and the mounting plates 42, and an occupied space of the terminal 2 in a height direction of the battery cell module is reduced. Wherein, the top of mounting bracket 3 is worn to establish in the mounting hole, can realize the location effect, avoids top cap 4 and mounting bracket 3 to rock relatively, and preferably, the mounting hole is the shoulder hole, then is equipped with the stair structure on the mounting bracket 3, ensures the accuracy of location. In addition, the bottom portion of the mounting bracket 3 is in abutment with the bottom surface of the mounting plate 42, making the overall structure more compact.

Further optimally, as shown in fig. 1, a plurality of heat dissipation holes 43 are provided all on the top cover 4, specifically, a plurality of heat dissipation holes 43 are provided all on the top plate 41. During the use, when electric core module takes place the thermal runaway, electric core 5 itself also produces a large amount of heats to be full of the inside of casing 1 fast, at this moment, through setting up louvre 43, can be so that the inside steam of casing 1 passes through louvre 43 directional discharge, and then draws steam from casing 1's top, avoids influencing other battery module, ensures the normal use of normal module.

As shown in fig. 2, the battery cell module includes a plurality of battery cells 5 connected in parallel, where the plurality of fingers are two or more, tabs 51 are respectively led out from two ends of the battery cells 5, and the tabs 51 led out from the same side are electrically connected to the terminal 2 through the bus bar 6. The inside of the casing 1 is provided with a bus bar support 7 for mounting the bus bar 6, the tab 51 is provided on the bus bar support 7 and electrically connected to the bus bar 6, and an insulating plate 8 is provided between the bus bar 6 and an end plate of the casing 1 to prevent direct contact between the bus bar 6 and the casing 1. It is worth noting that the bus bar support 7 and the mounting rack 3 are made of insulating materials, and the setting requirement of the battery module is met.

Further optimally, the end part of the pole 2 is provided with a connecting plate 21 connected with the bus bar 6, the diameter of the connecting plate 21 is larger than that of the pole 2, the contact area of the pole 2 and the bus bar 6 can be increased by adopting the design mode, the current transfer effect is ensured, and the connection strength can be increased.

The present invention also provides a battery pack including a plurality of the above-described unit modules connected in parallel, the unit modules having all technical features of the above-described unit modules, and therefore, not described herein in detail.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A unit module, characterized in that the unit module comprises:

the battery cell module is characterized in that two ends of the battery cell module in the length direction are respectively and electrically connected with a pole post (2), and the pole posts (2) extend along the height direction of the battery cell module; and

the battery cell module comprises a shell (1), wherein a containing cavity used for containing the battery cell module is formed in the shell (1), a heat radiation hole (43) used for communicating the containing cavity to the outside is formed in one side of the shell (1) in the height direction of the battery cell module, and the pole (2) extends out of the shell (1).

2. The cell module according to claim 1, characterised in that the pole (2) is mounted on the housing (1) by means of a mounting frame (3), the end of the pole (2) facing the outside of the housing (1) protruding out of the mounting frame (3).

3. The cell module according to claim 2, wherein the housing (1) comprises a detachably arranged top cover (4), and both ends of the top cover (4) are respectively provided with mounting holes for mounting the mounting frame (3).

4. The unit module according to claim 3, wherein the top cover (4) comprises a top plate (41) and mounting plates (42) respectively provided at both sides of the top plate (41), the top plate (41) and the two mounting plates (42) constituting a convex structure, and the two mounting holes are respectively provided at the two mounting plates (42).

5. The unit module according to claim 3, wherein a plurality of the heat dissipation holes (43) are provided in the top cover (4).

6. The unit module of claim 1, characterized in that the cell module comprises a plurality of cells (5) connected in parallel, tabs (51) are respectively led out from two ends of the cells (5), and the tabs (51) led out from the same side are electrically connected with the pole (2) through a busbar (6).

7. The cell module according to claim 6, characterised in that the end of the pole (2) is provided with a connection plate (21) for electrical connection with the busbar (6), the diameter of the connection plate (21) being greater than the diameter of the pole (2).

8. The cell module according to claim 6, characterised in that the housing (1) is provided internally with a busbar holder (7) for mounting the busbar (6), the tabs (51) being provided on the busbar holder (7).

9. The cell module according to claim 6, characterised in that an insulating plate (8) is provided between the busbar (6) and an end plate of the housing (1).

10. A battery pack comprising a plurality of unit modules according to any one of claims 1 to 9 connected in parallel.