CN220400690U

CN220400690U - Battery module

Info

Publication number: CN220400690U
Application number: CN202321501374.2U
Authority: CN
Inventors: 赵红亮; 骆飞燕; 沈高松; 刘轶豪; 林文海; 林青斌
Original assignee: Shenzhen Hello Tech Energy Co Ltd
Current assignee: Shenzhen Hello Tech Energy Co Ltd
Priority date: 2023-06-13
Filing date: 2023-06-13
Publication date: 2024-01-26
Anticipated expiration: 2033-06-13

Abstract

The utility model relates to the technical field of energy storage equipment, and discloses a battery module, which comprises: the battery pack is internally provided with a central area and an edge area wound on the periphery of the central area, and a plurality of battery cells are arranged in the central area and the edge area; the central heat-conducting plate is arranged at the outer side of the battery pack and is in heat-conducting connection with the battery cells in the central area; and the lateral heat conducting plate is in heat conducting connection with the central heat conducting plate, is arranged on the outer side of the battery pack, and is in heat conducting connection with the electric core in the edge area. The battery module provided by the utility model can reduce the temperature difference between the battery cells in the central area and the battery cells in the edge area, so as to improve the temperature consistency, and can also realize the outward natural heat dissipation through the central heat conducting plate and the lateral heat conducting plate, so as to achieve a higher protection level.

Description

Battery module

Technical Field

The utility model relates to the technical field of energy storage equipment, in particular to a battery module.

Background

The energy storage assists in increasing the stability of the power system, and can be classified into portable, household, industrial and commercial, power grid side and the like according to scenes. Among them, portable energy storage is an emerging market in recent years.

The portable energy storage power supply, called outdoor power supply for short, is a small energy storage device which replaces the traditional small fuel generator and is internally provided with a lithium ion battery, and has the characteristics of large capacity, high power, safety and portability. At present, the portable energy storage power supply has the defects of larger energy density, poor temperature consistency, serious heat collection of the battery cells in the middle area, difficult adoption of natural heat dissipation and low high protection level.

Therefore, a battery module is needed to solve the above-mentioned technical problems.

Disclosure of Invention

Based on the above, the utility model aims to provide a battery module, which reduces the temperature difference between the battery cells in the central area and the battery cells in the edge area so as to improve the temperature consistency, and can naturally dissipate heat outwards through the central heat-conducting plate and the lateral heat-conducting plate so as to achieve higher protection level.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

providing a battery module, comprising:

the battery pack is internally provided with a central area and an edge area wound on the periphery of the central area, and a plurality of battery cells are arranged in the central area and the edge area;

the central heat conducting plate is arranged on the outer side of the battery pack and is in heat conducting connection with the battery cells in the central area;

the lateral heat conducting plate is in heat conducting connection with the central heat conducting plate, the lateral heat conducting plate is arranged on the outer side of the battery pack, and the lateral heat conducting plate is in heat conducting connection with the battery cell in the edge area.

As an alternative technical solution of the battery module, further comprising:

and the heat transfer component is in heat conduction connection with the central heat conduction plate and the lateral heat conduction plates, and can transfer heat on the central heat conduction plate to the lateral heat conduction plates.

As an optional technical scheme of the battery module, the heat transfer assembly comprises a heat pipe, and the heat pipe is in heat conduction connection with the central heat conduction plate and the lateral heat conduction plate.

As an alternative solution of the battery module, the central heat-conducting plate is disposed at the bottom of the battery pack.

As an optional technical scheme of the battery module, a plurality of heat conducting fins are arranged on the inner side of the lateral heat conducting plate at intervals, the heat conducting fins are inserted into gaps between adjacent battery cells, and the heat conducting fins are in heat conducting connection with the adjacent battery cells.

As an optional technical scheme of the battery module, heat-conducting glue is poured into a gap between adjacent battery cells, and the heat-conducting fins are in heat-conducting connection with the adjacent battery cells through the heat-conducting glue.

As an optional technical scheme of battery module, the battery pack still includes the shell, the electric core all install in the shell, the side direction heat conduction board is located the outside of shell, be equipped with a plurality of holes of stepping down on the lateral wall of shell, the heat conduction fin is warp step down the hole and insert in adjacent in the clearance between the electric core.

As an optional technical scheme of the battery module, the battery pack further comprises a busbar, wherein the busbar is arranged above and below the battery cells, and a plurality of battery cells are connected in series and/or in parallel through the busbar.

As an optional technical scheme of the battery module, the central heat-conducting plate is arranged on the outer side of the busbar below, a heat-conducting gasket is arranged between the central heat-conducting plate and the busbar, and the central heat-conducting plate is in heat-conducting connection with the busbar through the heat-conducting gasket.

As an optional technical scheme of the battery module, two lateral heat conducting plates are arranged and symmetrically arranged on two opposite sides of the battery pack, and the two lateral heat conducting plates are at least in heat conducting connection with the adjacent electric cores.

As an alternative technical scheme of the battery module, the central heat conducting plate and/or the lateral heat conducting plates are made of aluminum alloy or copper.

As an optional technical scheme of the battery module, the battery cells adopt cylindrical battery cells, the battery cells are distributed along a plurality of rows and a plurality of columns, and the battery cells arranged in two adjacent rows are arranged in a staggered mode.

The beneficial effects of the utility model are as follows:

according to the battery module, the central heat conducting plate is arranged at the bottom of the battery pack, the lateral heat conducting plate is arranged outside the side wall of the battery pack, when the battery module works, heat in the battery pack is harder to dissipate when approaching the central area, the heat collecting phenomenon is serious, the temperature of the central area is higher than that of the edge area, a battery cell in the central area can transfer heat to the central heat conducting plate at the bottom, the central heat conducting plate can transfer heat to the lateral heat conducting plate, the lateral heat conducting plate can transfer heat to the battery cell in the edge area, the temperature difference between the battery cell in the central area and the battery cell in the edge area is reduced, so that the consistency of the temperature is improved, and meanwhile, the heat in the battery pack can be outwards dissipated through the central heat conducting plate and the lateral heat conducting plate, so that natural heat dissipation is realized, and a higher protection level is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present utility model;

fig. 2 is a sectional view of a battery module according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a battery pack according to an embodiment of the present utility model;

fig. 4 is a schematic view showing a partial structure of a battery module according to an embodiment of the present utility model;

fig. 5 is a schematic diagram showing a partial structure of a battery module according to an embodiment of the present utility model.

In the figure:

100. a battery pack; 10. a battery cell; 20. a housing; 30. a relief hole; 40. a busbar; 1. a central heat-conducting plate; 2. a side heat conduction plate; 3. a first heat pipe; 4. a second heat pipe; 5. a thermally conductive gasket; 6. and a heat conduction fin.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. 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 fall within the scope of the utility model.

As shown in fig. 1-5, the present embodiment provides a battery module, which belongs to a portable energy storage power source, and the battery module includes a battery pack 100 and a heat dissipation structure, wherein the heat dissipation structure is used for accelerating the heat dissipation of the battery pack 100, and improving the temperature uniformity of the battery pack 100.

As shown in fig. 1-5, the battery pack 100 includes a battery cell 10, a housing 20 and a busbar 40, the housing 20 is configured as a rectangular structure, the battery cells 10 are all installed in the housing 20, a central area and an edge area around the periphery of the central area are provided in the housing 20, a plurality of battery cells 10 are all provided in the central area and the edge area, the battery cells 10 adopt cylindrical battery cells, the battery cells 10 are arranged along a plurality of rows and a plurality of columns, in this embodiment, the battery cells 10 are provided with four rows, each row includes eight battery cells 10, and the battery cells 10 provided in two adjacent rows are arranged in a staggered manner; the upper and lower sides of the battery cells 10 are respectively provided with a bus bar 40, the bus bars 40 are made of metal conductors such as copper, aluminum and the like, and a plurality of battery cells 10 are connected in series and/or in parallel through the bus bars 40. The heat dissipation structure comprises a central heat conduction plate 1, lateral heat conduction plates 2 and a heat transfer component, wherein the central heat conduction plate 1 is arranged on the outer side of the battery pack 100, the central heat conduction plate 1 is in heat conduction connection with a battery cell 10 in a central area, the lateral heat conduction plate 2 is arranged on the outer side of the battery pack 100, the lateral heat conduction plate 2 is in heat conduction connection with the battery cell 10 in an edge area, the heat transfer component is in heat conduction connection with the central heat conduction plate 1 and the lateral heat conduction plate 2, and the heat transfer component can transfer heat on the central heat conduction plate 1 to the lateral heat conduction plate 2.

Specifically, the battery module provided in this embodiment sets up the central heat-conducting plate 1 in the bottom of battery package 100, set up side heat-conducting plate 2 outside the lateral wall of battery package 100, when the battery module during operation, the heat that the battery package 100 is more close to the central region is harder to dispel, the heat collection phenomenon is serious, the temperature in central region is higher than the marginal region, electric core 10 in the central region can be to the central heat-conducting plate 1 transfer heat of bottom, central heat-conducting plate 1 passes through the heat conduction subassembly with heat transfer to side heat-conducting plate 2, side heat-conducting plate 2 again with heat transfer to electric core 10 in the marginal region, reduce the uniformity of temperature between electric core 10 in the central region and electric core 10 in the marginal region, heat in the battery package 100 can outwards dispel through central heat-conducting plate 1 and side heat-conducting plate 2 simultaneously, realize natural heat dissipation, in order to reach higher protection level.

In the present embodiment, the central heat conductive plate 1 is provided at the bottom of the battery pack 100. Of course, in other embodiments of the present utility model, the central heat-conducting plate 1 may be disposed at the top of the battery pack 100, and the technical effect of conducting heat out of the central region can be achieved as well.

As shown in fig. 1-5, the heat transfer assembly includes a heat transfer assembly including a heat pipe, the heat pipe is thermally connected to a central heat conducting plate 1 and a lateral heat conducting plate 2, specifically, the heat pipe includes a first heat pipe 3 and a second heat pipe 4, the first heat pipe 3 is horizontally penetrating through the central heat conducting plate 1, the second heat pipe 4 vertically penetrating through the lateral heat conducting plate 2 in a vertical plane, and the first heat pipe 3 is communicated with a lower end of the second heat pipe 4. The first heat pipe 3 and the second heat pipe 4 both adopt the existing heat pipe structure, are high heat conduction elements, have heat conduction coefficients up to 10000, are optionally arranged to be cylindrical structures, are made of copper, are internally provided with capillary structures, realize high heat conduction performance through internal heat conduction medium phase change, and achieve the purpose of heat conduction. Because the first heat pipe 3 is arranged below the lateral heat conducting plate 2, the second heat pipe 4 penetrates through the lateral heat conducting plate 2 from bottom to top, and the first heat pipe 3 absorbs heat from the central heat conducting plate 1 with higher temperature, so that the heat absorption phase of the heat conducting medium in the first heat pipe 3 changes into a gaseous state, the gaseous heat conducting medium moves upwards along the first heat pipe 3 and the second heat pipe 4, and the heat is transmitted from bottom to top, so that the heat is transmitted to the lateral heat conducting plate 2.

As shown in fig. 2, the central heat-conducting plate 1 is disposed below the bus bar 40, a heat-conducting pad 5 is disposed between the central heat-conducting plate 1 and the bus bar 40, the central heat-conducting plate 1 and the bus bar 40 are in heat-conducting connection through the heat-conducting pad 5, the heat generated by the battery cell 10 in the central area is transferred to the central heat-conducting plate 1 sequentially through the bus bar 40 and the heat-conducting pad 5, and the heat-conducting pad 5 can fill a micro gap between the central heat-conducting plate 1 and the bus bar 40, thereby improving heat-conducting efficiency and playing an insulating role.

Illustratively, the heat-conducting pad 5 may be made of a heat-conducting insulating material such as heat-conducting silicone grease, heat-conducting silica gel, or the like.

In this embodiment, as shown in fig. 4 and 5, two lateral heat conducting plates 2 are provided, the two lateral heat conducting plates 2 are symmetrically disposed at opposite sides of the battery pack 100 in the length direction, and the two lateral heat conducting plates 2 are at least in heat conduction connection with the adjacent electric cells 10, and can also be in heat conduction connection with the inner electric cells 10, so as to further improve soaking efficiency.

As shown in fig. 4 and 5, two second heat pipes 4 are disposed in each side heat conducting plate 2 in a penetrating manner, two first heat pipes 3 are disposed in the central heat conducting plate 1 in a penetrating manner, and two ends of each first heat pipe 3 are respectively connected to lower ends of the two second heat pipes 4, so as to further improve the heat conducting efficiency of the central heat conducting plate 1 to the side heat conducting plates 2.

In other embodiments, four lateral heat-conducting plates 2 may be provided, and the four lateral heat-conducting plates 2 are respectively disposed on four sidewalls of the housing 20 and are thermally connected to the central heat-conducting plate 1 through the first heat pipe 3 and the second heat pipe 4.

As shown in fig. 3-5, the lateral heat-conducting plate 2 is disposed on the outer side of the housing 20, a plurality of heat-conducting fins 6 are disposed on the inner side of the lateral heat-conducting plate 2 at intervals, a plurality of abdicating holes 30 are disposed on the side wall of the housing 20, the heat-conducting fins 6 are inserted into the gaps between the adjacent cells 10 through the abdicating holes 30, and the heat-conducting fins 6 are in heat-conducting connection with the adjacent cells 10. Specifically, the lateral heat conducting plate 2 guides the heat acquired from the second heat pipe 4 to the battery cell 10 in the edge area through the heat conducting fin 6, so that the battery cell 10 in the edge area with lower temperature is heated, the temperature difference between the battery cell 10 in the edge area and the battery cell 10 in the central area is reduced, and the soaking efficiency is improved.

As shown in fig. 3, the relief holes 30 are provided in a vertically extending elongated hole structure, which is adapted to the shape of the heat conducting fins 6.

Illustratively, the gaps between the adjacent cells 10 are filled with heat-conducting glue, and the heat-conducting fins 6 are in heat-conducting connection with the adjacent cells 10 through the heat-conducting glue. The setting of heat conduction glue can fix heat conduction fin 6 on the one hand, avoids heat conduction fin 6 to rock in battery package 100, and on the other hand can fill the air gap between heat conduction fin 6 and the electric core 10, further improves heat conduction efficiency.

Illustratively, the heat conducting fins 6 are integrally formed with the lateral heat conducting plate 2.

The lateral heat conducting plate 2 is made of high heat conducting coefficient materials such as aluminum alloy or copper, and has good heat conducting performance.

The central heat-conducting plate 1 is made of high-heat-conductivity materials such as aluminum alloy or copper, and has good heat-conducting property.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. The battery module, its characterized in that includes:

the battery pack (100) is internally provided with a central area and an edge area wound on the periphery of the central area, and a plurality of battery cells (10) are arranged in the central area and the edge area;

the central heat conducting plate (1) is arranged on the outer side of the battery pack (100), and the central heat conducting plate (1) is in heat conducting connection with the battery cell (10) in the central area;

the lateral heat conducting plate (2) is in heat conducting connection with the central heat conducting plate (1), the lateral heat conducting plate (2) is arranged on the outer side of the battery pack (100), and the lateral heat conducting plate (2) is in heat conducting connection with the battery cell (10) in the edge area.

2. The battery module according to claim 1, further comprising:

and the heat transfer component is in heat conduction connection with the central heat conduction plate (1) and the lateral heat conduction plates (2), and can transfer heat on the central heat conduction plate (1) to the lateral heat conduction plates (2).

3. The battery module according to claim 2, wherein the heat transfer assembly comprises a heat pipe thermally connected to the central heat transfer plate (1) and the lateral heat transfer plates (2).

4. The battery module according to claim 1, wherein the central heat conductive plate (1) is placed at the bottom of the battery pack (100).

5. The battery module according to claim 1, wherein a plurality of heat conducting fins (6) are arranged at intervals on the inner side of the lateral heat conducting plate (2), the heat conducting fins (6) are inserted into gaps between adjacent battery cells (10), and the heat conducting fins (6) are in heat conducting connection with the adjacent battery cells (10).

6. The battery module according to claim 5, wherein a heat-conducting glue is poured into a gap between adjacent cells (10), and the heat-conducting fins (6) are in heat-conducting connection with the adjacent cells (10) through the heat-conducting glue.

7. The battery module according to claim 5, wherein the battery pack (100) further comprises a housing (20), the battery cells (10) are all installed in the housing (20), the lateral heat conducting plates (2) are arranged on the outer side of the housing (20), a plurality of abdicating holes (30) are formed in the side wall of the housing (20), and the heat conducting fins (6) are inserted into gaps between adjacent battery cells (10) through the abdicating holes (30).

8. The battery module according to claim 1, wherein the battery pack (100) further comprises a bus bar (40), the bus bar (40) is provided above and below each of the battery cells (10), and a plurality of the battery cells (10) are connected in series and/or in parallel through the bus bar (40).

9. The battery module according to claim 8, wherein the central heat-conducting plate (1) is arranged on the outer side of the busbar (40) below, a heat-conducting gasket (5) is arranged between the central heat-conducting plate (1) and the busbar (40), and the central heat-conducting plate (1) and the busbar (40) are in heat-conducting connection through the heat-conducting gasket (5).

10. The battery module according to any one of claims 1 to 9, wherein two lateral heat conducting plates (2) are provided, the two lateral heat conducting plates (2) are symmetrically arranged on two opposite sides of the battery pack (100), and the two lateral heat conducting plates (2) are at least in heat conducting connection with the adjacent electric cells (10).

11. Battery module according to any one of claims 1-9, characterized in that the central heat conducting plate (1) and/or the lateral heat conducting plates (2) are made of an aluminium alloy or copper.

12. The battery module according to any one of claims 1 to 9, wherein the cells (10) are cylindrical cells, the cells (10) are arranged along a plurality of rows and a plurality of columns, and the cells (10) arranged in two adjacent rows are arranged in a staggered manner.