CN219017855U

CN219017855U - Battery module

Info

Publication number: CN219017855U
Application number: CN202223487507.3U
Authority: CN
Inventors: 吕俊峰
Original assignee: Goodwe Technologies Co Ltd
Current assignee: Goodwe Technologies Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-05-12
Anticipated expiration: 2032-12-23

Abstract

The utility model provides a battery module, which comprises a plurality of battery cores and protection plates, wherein an explosion-proof valve is arranged on any battery core, the explosion-proof valve is arranged in the same direction, the protection plates are arranged on one side of the battery core, a plurality of exhaust holes are arranged on the protection plates, the exhaust holes are arranged at valve ports of the explosion-proof valve, porous structural parts and absorption parts are arranged in any exhaust holes, and the battery module with the structure is provided with the porous structural parts and the absorption parts in the exhaust holes.

Description

Battery module

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to a battery module.

Background

The lithium ion battery has the advantages of light weight, high energy density, no memory effect and the like, is applied to the fields of energy storage and power, but can cause explosion-proof valve to be flushed out due to continuous aggregation of internal gas in the limit use process of the lithium ion battery, wherein electrolyte is sprayed out to decompose to generate acidic substances, corrode other parts or provide combustion improver, thereby affecting the use of other batteries and even causing huge loss due to combustion.

The lithium ion battery in the prior art comprises a battery core and an explosion-proof valve arranged on the battery core, a layer of PET plate is further covered above the battery core, vent holes with a certain shape are formed in the PET plate and correspond to the positions of the explosion-proof valves of the battery core one by one, when the battery core is heated or impacted, and when the explosion-proof valve is flushed due to accumulation of gas in the battery core, electrolyte (lithium ion battery is generally lithium hexafluorophosphate) and various gases such as hydrogen and oxygen are released, and the electrolyte has the risk of corroding structural components of the module or other battery cores.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is that the lithium ion battery in the prior art comprises a battery core and an explosion-proof valve arranged on the battery core, a layer of PET plate is also covered above the battery core, a certain-shaped exhaust hole is arranged on the PET plate and corresponds to the position of the battery core explosion-proof valve one by one, when the battery core is heated or impacted, the explosion-proof valve is opened due to accumulation of gas in the battery core, electrolyte (lithium hexafluorophosphate is generally used as the lithium ion battery), various gases such as hydrogen and oxygen and the like are released, and the electrolyte has the risk of corroding module structural components or other battery cores.

To this end, the present utility model provides a battery module including:

the battery cell is provided with a plurality of battery cells, and any battery cell is provided with an explosion-proof valve;

the protection plate is arranged on one side of the battery cell, an exhaust part is arranged on the protection plate, and the exhaust part is arranged at the valve port of the explosion-proof valve;

and any exhaust part is internally provided with a porous structural part and an adsorption part.

Optionally, the adsorbent is alkaline.

Optionally, the porous structure is shaped and sized to conform to the exhaust.

Optionally, the porous structure has a thickness consistent with the thickness of the guard plate.

Optionally, the porous structure is bonded to the exhaust.

Optionally, the diameter of the inner pore canal of the porous structural member is more than or equal to 1um.

Optionally, the protection plate is a PET plate.

Optionally, the protection plate is connected with the battery cell through a fastener.

Optionally, the exhaust part is a plurality of exhaust holes arranged on the protection plate, and the exhaust holes are arranged at the valve port of the explosion-proof valve.

Optionally, the exhaust part is a strip through groove arranged on the protection plate, and the strip through groove is arranged at the valve port of the explosion-proof valve.

The battery module provided by the utility model has the following advantages:

1. the utility model provides a battery module, which comprises a plurality of battery cores and protection plates, wherein an explosion-proof valve is arranged on any battery core, the explosion-proof valves are arranged in the same direction, the protection plates are arranged on one side of the battery cores, a plurality of exhaust holes are arranged on the protection plates, the exhaust holes are arranged at valve ports of the explosion-proof valves, and a porous structural member and an adsorption member are arranged in any exhaust hole.

According to the battery module with the structure, the porous structural part and the adsorption part are arranged in the exhaust hole, when the explosion-proof valve is opened due to the fact that the battery core is heated or impacted, and gas in the battery core is accumulated, and when electrolyte and various gases such as hydrogen and oxygen flow out of the explosion-proof valve, the porous structural part and the adsorption part which are arranged in the exhaust hole at the valve port of the explosion-proof valve can absorb the electrolyte and various gases such as hydrogen and oxygen, so that the electrolyte is prevented from corroding the module structural part or other battery cores.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of the structure of a battery module provided in an embodiment of the present utility model;

fig. 2 is a schematic diagram illustrating connection positions of battery cells in a battery module according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a protection plate in a battery module according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of the structure at circle A in FIG. 3;

reference numerals illustrate:

1-an electric core;

2-an explosion-proof valve;

3-protecting plates;

4-an exhaust section;

5-porous structure.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of 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 "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Examples

The embodiment provides a battery module, as shown in fig. 1 to 4, including five electric cores 1 and a guard plate 3 that set up side by side, arbitrary all be equipped with an explosion-proof valve 2 on the electric core 1, explosion-proof valve 2 all sets up, and guard plate 3 connects electric core 1 top, exhaust portion 4 has been seted up on the guard plate 3, exhaust portion 4 is five exhaust holes of setting up on guard plate 3, the exhaust hole is located explosion-proof valve 2 valve port department, arbitrary be equipped with porous structure 5 and absorption spare in the exhaust hole, wherein the absorption spare is alkaline substance. The porous structure 5 is a material having a network structure formed by interconnected or closed pores.

Further, as shown in fig. 4, the shape and size of the porous structural member 5 are consistent with those of the exhaust hole, and the porous structural member 5 and the side wall of the exhaust hole are connected in an adhesive connection mode, wherein the diameter of the inner hole of the porous structural member 5 is more than or equal to 1um.

Furthermore, the protection plate 3 is a PET plate, the thickness of the porous structural member 5 is consistent with that of the protection plate 3, and the protection plate is connected with the battery cell through fasteners such as screws.

Through be equipped with porous structure 5 and adsorption piece in the exhaust hole, when electricity core 1 is because being heated or receiving the impact, and electricity core 1 inside gas is piled up and is caused explosion-proof valve 2 to dash out, and when various gases such as electrolyte and hydrogen and oxygen flow out from explosion-proof valve 2, locate the inside porous structure 5 and the adsorption piece of exhaust hole of explosion-proof valve 2 valve port department can absorb various gases such as electrolyte and hydrogen and oxygen to prevent that the electrolyte corrodes module structural part or other electricity core 1.

And because the acid generated in the electrolyte is a medium strong acid and is easy to react with alkali, the adsorption piece is arranged as an alkaline substance, and partial acid can be neutralized, so that the purpose of reducing the acidity is achieved.

It will be appreciated that in other embodiments the number of vent holes in the shield plate 3 may be greater than the number of explosion proof valves 2.

It will be appreciated that in other embodiments, the exhaust portion 4 may be a strip-shaped through groove provided on the protection plate 3, where the strip-shaped through groove is provided at the valve port of the explosion-proof valve 2, and a porous structural member 5 and an adsorption member are provided in the strip-shaped through groove.

In other embodiments, the number of the battery cells 1 may be other numbers, which is determined according to the use requirement.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A battery module, comprising:

a plurality of electric cores (1), wherein an explosion-proof valve (2) is arranged on any electric core (1);

the protection plate (3) is arranged on one side of the battery cell (1), an exhaust part (4) is arranged on the protection plate (3), and the exhaust part (4) is arranged at the valve port of the explosion-proof valve (2);

it is characterized in that the method comprises the steps of,

a porous structural member (5) and an adsorption member are arranged in any one of the exhaust parts (4).

2. The battery module according to claim 1, wherein the adsorption member is alkaline.

3. The battery module according to claim 1 or 2, wherein the porous structure member (5) is shaped and sized in conformity with the exhaust portion (4).

4. A battery module according to claim 3, wherein the porous structure member (5) has a thickness identical to the thickness of the protection plate (3).

5. The battery module according to claim 4, wherein the porous structure member (5) is bonded to the exhaust portion (4).

6. The battery module according to claim 5, wherein the diameter of the inner pore of the porous structure member (5) is not less than 1 μm.

7. The battery module according to any one of claims 4 to 6, wherein the protection plate (3) is a PET plate.

8. The battery module according to claim 7, wherein the protection plate (3) is connected with the battery cell (1) by a fastener.

9. The battery module according to claim 1, wherein the exhaust part (4) is a plurality of exhaust holes arranged on the protection plate (3), and the exhaust holes are arranged at the valve port of the explosion-proof valve (2).

10. The battery module according to claim 1, wherein the exhaust part (4) is a strip-shaped through groove arranged on the protection plate (3), and the strip-shaped through groove is arranged at the valve port of the explosion-proof valve (2).