CN219350362U

CN219350362U - Layered heat dissipation structure of lithium battery pack

Info

Publication number: CN219350362U
Application number: CN202223432832.XU
Authority: CN
Inventors: 鄢启洪
Original assignee: Shenzhen Huagreen Technology Co ltd
Current assignee: Shenzhen Huagreen Technology Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-07-14
Anticipated expiration: 2032-12-21

Abstract

The utility model discloses a layered heat radiation structure of a lithium battery pack, which comprises a shell, wherein a battery output end is arranged on the shell, a battery pack and a protection circuit board are also arranged in the shell, the battery pack is electrically connected with the protection circuit board, the protection circuit board is electrically connected with the battery output end, the shell comprises an upper shell, a middle shell and a lower shell, the upper shell is clamped with the middle shell and forms an upper cavity, the middle shell and the lower shell are fixedly connected and form a lower cavity, and the protection circuit board is arranged in the upper cavity and is fixedly connected with the upper shell; the battery pack is arranged in the lower cavity, a hole is formed in the middle shell at the top of the lower cavity, and a gap between the lower cavity and the battery pack is filled with heat dissipation pouring sealant; the utility model effectively solves the problem that the two heating sources are positioned in the same cavity, and avoids the situation that the internal temperature of the battery pack is too high due to superposition of heat, thereby damaging the battery pack; meanwhile, the heat dissipation pouring sealant is filled in the gap between the battery pack and the lower cavity, so that the battery pack is more uniform in heat dissipation and better in heat dissipation effect, and meanwhile, the structure is simple in design and easy to assemble.

Description

Layered heat dissipation structure of lithium battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a layered heat dissipation structure of a lithium battery pack.

Background

Along with the progress of science and technology, in the wide application life of battery as new forms of energy, because battery pack can produce a large amount of heat when the work charges and discharges, and the protection shield also can produce a large amount of heat, if do not have fine processing mode can lead to battery thermal runaway, seriously can lead to battery trouble to fire.

In the utility model of patent number 201921417461.3, in some existing lithium battery assembly technical schemes, a lithium battery cell and a protection plate are often located in the same space, and are simply fixed by using an adhesive tape, so that the assembly consistency is difficult to ensure, and the manufacturability is poor; in general, a single-layer shell glue pouring scheme is adopted in a lithium battery, if the tightness of a battery cell is ensured, the height of the shell is limited, if the shell is considered first, the glue pouring height of the battery cell is possibly limited, the assembly of the glue pouring and the battery part is greatly influenced mutually, and the manufacturability is also limited to a certain extent; the lithium battery is influenced by individual differences in operation, the heating of the battery cells is inconsistent, the filled colloid is only in waterproof consideration, the heat conductivity is general, the phenomenon of uneven heating is lack of improvement, and the waterproof soaking structure of the lithium battery pack is provided.

Disclosure of Invention

The utility model aims to provide a layered heat dissipation structure of a lithium battery pack, which solves the defects existing in the prior art and optimizes the prior art.

In order to achieve the aim of the utility model, the technical scheme adopted is as follows:

the lithium battery pack layered heat radiation structure comprises a shell, wherein a battery output end is arranged on the shell, a battery pack and a protection circuit board are further arranged in the shell, the battery pack is electrically connected with the protection circuit board, the protection circuit board is electrically connected with the battery output end, the shell comprises an upper shell, a middle shell and a lower shell, the upper shell is clamped with the middle shell to form an upper cavity, the middle shell is fixedly connected with the lower shell to form a lower cavity, and the protection circuit board is arranged in the upper cavity and is fixedly connected with the upper shell; the battery package set up in the cavity down, be equipped with the hole on the shell in the cavity top down, the cavity down with the space between the battery package fills heat dissipation pouring sealant.

Preferably, the hole is a round hole.

Preferably, the number of holes is 2.

Preferably, the protection circuit board is disposed at the top of the upper cavity and is clamped with the upper shell.

The utility model has the beneficial effects that: according to the layered heat dissipation structure of the lithium battery pack, the shell is divided into the upper cavity and the lower cavity, the protection circuit board is arranged in the upper cavity, and the battery pack is arranged in the lower cavity, so that the problem that two heating sources are positioned in the same cavity and the battery pack is prevented from being damaged due to overhigh internal temperature caused by overlapping of heat is effectively solved; meanwhile, the heat dissipation pouring sealant is filled in the gap between the battery pack and the lower cavity, so that the battery pack is more uniform in heat dissipation and better in heat dissipation effect, and meanwhile, the structure is simple in design and easy to assemble.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without inventive effort:

fig. 1 is an exploded view of a layered heat dissipating battery pack structure according to the present utility model.

FIG. 2 is a schematic view of the shell structure of the present utility model

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

As shown in fig. 1 and 2, a layered heat dissipation structure 100 of a lithium battery pack comprises a casing 101, wherein a battery output end 70 is arranged on the casing 101, a battery pack 40 and a protection circuit board 20 are further arranged in the casing 101, the battery pack 40 is electrically connected with the protection circuit board 20, the protection circuit board 20 is electrically connected with the battery output end 70, the casing 101 comprises an upper shell 10, a middle shell 30 and a lower shell 50, the upper shell 10 is clamped with the middle shell 30 to form an upper cavity, the middle shell 30 is fixedly connected with the lower shell 50 to form a lower cavity, and the protection circuit board 20 is arranged in the upper cavity and is fixedly connected with the upper shell 10; the battery pack 40 is disposed in the lower cavity, the middle shell 30 at the top of the lower cavity is provided with a hole 31, and a gap between the lower cavity and the battery pack 40 is filled with a heat dissipation pouring sealant (not shown in the figure).

In the embodiment, through the layered design, namely the shell 101 is divided into an upper cavity and a lower cavity, the protection circuit board 20 is arranged in the upper cavity, the battery pack 40 is arranged in the lower cavity, so that the two heating sources are separated for heat dissipation, and the damage to the battery pack caused by superposition of heat generated by the two heating sources when the battery pack works is avoided; filling a heat dissipation pouring sealant (not shown in the figure) in a gap between the lower cavity and the battery pack 40, so that the battery pack 40 dissipates heat more uniformly and has a better heat dissipation effect; in the present embodiment, a hole 31 is provided in the middle case 30 at the top of the lower cavity, and the main purpose is to fill the space between the cavity and the battery pack 40 with a heat dissipation potting adhesive (not shown) through the hole 31, so that the space between the cavity and the battery pack 40 is filled with the heat dissipation potting adhesive (not shown).

Preferably, the hole 31 is a circular hole 31.

Preferably, the number of holes 31 is 2, so that air between the cavity and the battery pack 40 is sufficiently discharged when filling the heat dissipation potting adhesive (not shown).

Preferably, the protection circuit board 20 is disposed at the top of the upper cavity and is clamped with the upper housing 10 and the upper housing 101, so as to facilitate the installation of the protection circuit board 20.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a lithium battery group spare layering heat radiation structure, includes the casing, be provided with the battery output on the casing, still be provided with battery package and protection circuit board in the casing, the battery package is connected with the protection circuit board electricity, protection circuit board is connected with battery output electricity, its characterized in that: the shell comprises an upper shell, a middle shell and a lower shell, wherein the upper shell is clamped with the middle shell to form an upper cavity, the middle shell is fixedly connected with the lower shell to form a lower cavity, and the protection circuit board is arranged in the upper cavity and is fixedly connected with the upper shell; the battery package set up in the cavity down, be equipped with the hole on the shell in the cavity top down, the cavity down with the space between the battery package fills heat dissipation pouring sealant.

2. The layered heat dissipation structure according to claim 1, wherein: the hole is a round hole.

3. The layered heat dissipation structure according to claim 2, wherein: the number of holes is 2.

4. A layered heat dissipation structure according to claim 3, wherein: the protection circuit board is arranged at the top of the upper cavity and is clamped with the upper shell.