CN216085113U

CN216085113U - Stable battery module group

Info

Publication number: CN216085113U
Application number: CN202121297317.8U
Authority: CN
Inventors: 张宇; 管伟东; 苏小军; 李进
Original assignee: Jiangsu Kesen Medical Devices Co ltd
Current assignee: Jiangsu Kesen Medical Devices Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-03-18
Anticipated expiration: 2031-06-10

Abstract

The utility model discloses a stable battery module group, which comprises at least two battery modules, wherein the battery modules are connected through an external copper bar, each battery module comprises a shell and an electric core group, the shell is formed by enclosing side plates and end plates, the electric core group is positioned in the shell, the electric core group comprises a plurality of electric cores which are sequentially arranged side by side, and adjacent electric cores are connected through the copper bar; the side plate further comprises an aluminum substrate, and an insulating layer and a heat-conducting silica gel cushion layer which are positioned on two sides of the aluminum substrate, wherein the insulating layer in the side plate is connected with the electric core group in a bonding manner, the heat-conducting silica gel cushion layers of the side plates in the adjacent battery modules are in contact, and a plurality of convex strips are arranged on one surface of the aluminum substrate in the side plate in parallel and at intervals. The stable battery module set can enhance the structural strength of the battery pack, avoid the problems of stress damage and the like caused by the expansion or contraction of the battery cell, and prolong the service life of the battery pack.

Description

Stable battery module group

Technical Field

The utility model relates to a stable battery module group, and belongs to the technical field of new energy batteries.

Background

The main structure of the new energy battery module which is generally applied in the market at present is as follows: the structure of PET insulating film is covered after the aluminium panel stamping forming, then the terminal surface is welded with the end plate after bending, plays the effect of cladding and fixed inside electric core. However, as the energy density of the new energy battery module is larger and larger, the battery core and the battery core are more and more compact, and the strength of the module structure concerns the safety of the whole new energy battery module; simultaneously, the inside temperature balance problem of new energy battery module can't be solved always, and the temperature difference between electric core and the electric core changes, leads to the charge-discharge capacity of electric core to appear the difference, leads to the unable accurate energy storage condition of discerning each electric core of BMS.

Disclosure of Invention

The utility model aims to provide a stable battery module which can enhance the structural strength of a battery pack, avoid the problems of stress damage and the like caused by expansion or contraction of a battery cell and prolong the service life of the battery pack.

In order to achieve the purpose, the utility model adopts the technical scheme that: a stable battery module group comprises at least two battery modules, wherein the battery modules are connected through an outer copper bar, each battery module comprises a shell formed by a side plate and an end plate and an electric core group positioned in the shell, the electric core group comprises a plurality of electric cores which are sequentially arranged side by side, and adjacent electric cores are connected through a copper bar;

the side plate further comprises an aluminum substrate, and an insulating layer and a heat-conducting silica gel cushion layer which are positioned on two sides of the aluminum substrate, wherein the insulating layer in the side plate is connected with the electric core group in a bonding manner, the heat-conducting silica gel cushion layers of the side plates in the adjacent battery modules are in contact, and a plurality of convex strips are arranged on one surface of the aluminum substrate in the side plate in parallel and at intervals.

The further improved scheme in the technical scheme is as follows:

1. in the above scheme, the plurality of the protruding strips are vertically arranged.

2. In the above scheme, the side plates are welded to the end plates.

3. In the above scheme, the insulating layer is a PET insulating film layer.

4. In the above scheme, the insulating layer and the aluminum substrate are bonded by hot pressing.

5. In the above scheme, the aluminum substrate is an aluminum extruded plate.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. the side plates of the stable battery module set further comprise an aluminum substrate, and insulating layers and heat-conducting silica gel cushion layers which are positioned on two sides of the aluminum substrate, the insulating layers in the side plates are connected with the battery core set in a bonding manner, and the heat-conducting silica gel cushion layers of the respective side plates in the adjacent battery modules are in contact, so that heat generated by overcurrent of the battery cores can be quickly transferred out, the heat between the battery cores and between the battery modules can be balanced, the charge and discharge efficiency is improved, and the service life of the battery pack is prolonged; in addition, a plurality of protruding strips are arranged on one surface of the aluminum substrate in the side plate in parallel at intervals, so that the structural strength of the battery pack can be enhanced, the problems of stress damage and the like caused by expansion or contraction of the battery cell are avoided, and the service life of the battery pack is prolonged.

Drawings

FIG. 1 is a schematic structural view of a stabilized battery module according to the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

fig. 3 is an enlarged view of a structure in fig. 2.

In the above drawings: 1. an aluminum substrate; 2. an insulating layer; 3. a thermally conductive silica gel cushion layer; 4. a raised strip; 5. an electric core; 6. copper bars; 7. a side plate; 8. an end plate; 10. and (4) outer copper bars.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: a stable battery module group comprises at least two battery modules, wherein the battery modules are connected through an outer copper bar 10, each battery module comprises a shell body formed by enclosing side plates 7 and end plates 8 and a battery core group positioned in the shell body, each battery core group comprises a plurality of battery cores 5 which are sequentially arranged side by side, and adjacent battery cores 5 are connected through a copper bar 6;

the side plate 7 further comprises an aluminum substrate 1, and an insulating layer 2 and a heat-conducting silica gel cushion layer 3 which are positioned on two sides of the aluminum substrate 1, wherein the insulating layer 2 in the side plate 7 is connected with the electric core group in a bonding manner, the heat-conducting silica gel cushion layers 3 of the respective side plates 7 in the adjacent battery modules are in surface contact, and a plurality of protruding strips 4 are arranged on one surface of the aluminum substrate 1 in the side plate 7 in a parallel manner and at intervals.

A plurality of the convex strips 4 are vertically arranged; the side plate 7 is welded with the end plate 8; the insulating layer 2 is a PET insulating film layer.

Example 2: a stable battery module group comprises at least two battery modules, wherein the battery modules are connected through an outer copper bar 10, each battery module comprises a shell body formed by enclosing side plates 7 and end plates 8 and a battery core group positioned in the shell body, each battery core group comprises a plurality of battery cores 5 which are sequentially arranged side by side, and adjacent battery cores 5 are connected through a copper bar 6;

The insulating layer 2 and the aluminum substrate 1 are bonded by hot pressing; the aluminum substrate 1 is an aluminum extruded plate.

Current flows through the anode and the cathode, the resistor R exists in the thousand-cell and the copper bar, certain difference occurs in the manufacturing process, the resistor R is unequal, the current I in the series circuit is certain, and the resistance is different from the resistance R in the thousand-cell and the copper bar in the manufacturing process according to the P = I²According to the utility model, adjacent battery modules are directly linked by utilizing the heat-conducting silica gel pad, and the heat balance of the whole system is achieved in a heat conduction mode;

the battery core generates heat, the volume of the battery core expands, and the aluminum extruded section bar is used for coating the battery core, so that the battery core has higher strength and better toughness, and safety problems such as stress damage caused by expansion and contraction of the battery core can be avoided.

When the stable battery module group is adopted, heat generated by over-current of the battery cores can be quickly transferred out, heat between the battery cores and between the battery modules can be balanced, the charge-discharge efficiency is improved, and the service life of the battery pack is prolonged;

in addition, the structural strength of the battery pack can be enhanced, the problems of stress damage and the like caused by expansion or contraction of the battery core are avoided, and the service life of the battery pack is prolonged.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a stable form battery module group, includes two at least battery modules, connect its characterized in that through outer copper bar (10) between the battery module: each battery module comprises a shell surrounded by side plates (7) and end plates (8) and an electric core group positioned in the shell, each electric core group comprises a plurality of electric cores (5) which are sequentially arranged side by side, and adjacent electric cores (5) are connected through a copper bar (6);

the side plate (7) further comprises an aluminum substrate (1), and an insulating layer (2) and a heat-conducting silica gel cushion layer (3) which are positioned on two sides of the aluminum substrate (1), wherein the insulating layer (2) in the side plate (7) is connected with the electric core group in an adhesive manner, the heat-conducting silica gel cushion layers (3) of the respective side plates (7) in the adjacent battery modules are in surface contact, and a plurality of protruding strips (4) are arranged on one surface of the aluminum substrate (1) in the side plate (7) in a parallel and spaced manner.

2. The stabilized battery module set of claim 1, wherein: the plurality of the protruding strips (4) are vertically arranged.

3. The stabilized battery module set of claim 1, wherein: the side plates (7) are connected with the end plates (8) in a welding mode.

4. The stabilized battery module set of claim 1, wherein: the insulating layer (2) is a PET insulating film layer.

5. The stabilized battery module set of claim 1, wherein: the insulating layer (2) is attached to the aluminum substrate (1) through hot pressing.

6. The stabilized battery module set of claim 1, wherein: the aluminum substrate (1) is an aluminum extruded plate.