Lithium-sulfur battery support structure and battery

Abstract

The utility model relates to a lithium-sulfur battery support structure and a battery. Relates to the technical field of lithium-sulfur batteries. Comprising a base and a support cover body which is matched with the base in size and located on the same vertical line with the base, a containing cavity is formed between the support cover body and the base, the containing cavity provides a battery installation area, anti-corrosion coatings are arranged on the surface of the base and the surface of the support cover body, and the support cover body is made of rigid materials and comprises a battery body. The battery body comprises a shell which is integrally formed by injection molding and is internally provided with a lithium-sulfur battery placement area, a heat conduction and dissipation block which is fixed with the shell and is used for dissipating heat, a sealing inner cover which is positioned in the shell and is used for sealing and protecting the lithium-sulfur battery, and an electrode contact block which is positioned on the inner side of the shell and is opposite to the position of the electrode connecting end; the mechanical strength and the sealing performance can be improved, and the problems of looseness and leakage between assemblies are reduced. The interior of the shell is divided into two parts by the partition plate, so that the internal structure of the battery is optimized, and the stability and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-sulfur batteries, in particular to a lithium-sulfur battery bracket structure and a battery. Background Art

[0002] Lithium-sulfur batteries are a new next-generation battery technology with the potential for high energy density and low cost;

[0003] The components in lithium-sulfur batteries, especially the sulfur positive electrode and lithium negative electrode materials, have large volume changes and mechanical stresses, which may cause deformation or fatigue of the internal components of the battery during the charging and discharging process, thereby reducing the strength and stability of the structure. The structural strength and protection of the battery will directly affect the performance in the later stage.

[0004] At the same time, since lithium-sulfur batteries generate heat during the charging and discharging process, and the solid electrolyte interface problem between the sulfur positive electrode and the lithium negative electrode can also cause local overheating, poor heat dissipation may cause the battery temperature to rise, thereby affecting its performance and safety. Utility Model Content

[0005] Purpose of the utility model: to provide a lithium-sulfur battery bracket structure and a battery, to solve the above-mentioned problems that the battery structure strength is not high enough, the safety performance is not perfect enough, and the structural performance of the battery itself is not comprehensive enough and the heat dissipation is not good.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lithium-sulfur battery bracket structure comprises: a base, a bracket cover body which is adapted to the size of the base and is located on the same vertical line with the base, a cavity is formed between the bracket cover body and the base, the cavity provides a battery installation area, and the base and the bracket cover body are provided with an anti-corrosion coating on their surfaces and are made of rigid material.

[0008] The cavity between the base and the bracket cover provides an installation area for the battery, which is conducive to the safe fixation and protection of the battery. The anti-corrosion coating on the surface of the base and the bracket cover can extend the service life of the bracket. At the same time, the use of rigid materials can also improve the stability and durability of the bracket. Such a design can effectively protect the lithium-sulfur battery.

[0009] According to one aspect of an embodiment of the present application, the base includes: a base body having a battery placement area disposed inside and a fully enclosed protective edge formed on the edge, and a heat dissipation cavity opened at the bottom end of the base body, wherein at least two heat dissipation cavities are symmetrically disposed along the vertical center line of the base body.

[0010] While protecting the safety of the battery, it improves the heat dissipation effect and reduces the bracket consumables to a certain extent, which helps to improve the performance and stability of the battery.

[0011] According to one aspect of the embodiments of the present application, the bracket cover includes: a sealing cover that is clamped to one end of the battery away from the base, a positioning bracket that is arranged in the middle position of the two long diameter directions of the sealing cover and welded to the sealing cover, a positioning bolt connected to the positioning bracket and the base, and an electrode connecting end arranged on the inner side of the sealing cover, and the positioning bolt passes through the positioning bracket and is fixed to the base.

[0012] According to one aspect of the embodiment of the present application, the positioning bracket is L-shaped, the short diameter portion is welded to the sealing cover body, and the long diameter portion is provided with a hole cavity adapted to the size of the positioning bolt.

[0013] This design helps to fix the bracket inside the sealing cover and provide stable support. The hole cavity on the long diameter part provides a location and fixing point for installing the positioning bolts. This structure helps to ensure the stability and accurate positioning of the bracket during installation.

[0014] A lithium-sulfur battery comprises a battery body, wherein the battery body comprises: a shell formed by integral injection molding and provided with a lithium-sulfur battery placement area therein, a heat-conducting heat-dissipating block fixed to the shell and used for heat dissipation, a sealed inner cover located inside the shell and sealingly protecting the lithium-sulfur battery, and an electrode contact block located inside the shell and opposite to an electrode connection end.

[0015] It helps protect the safety and stability of lithium-sulfur batteries while providing heat dissipation and sealing functions to ensure the normal operation of the battery.

[0016] According to one aspect of the embodiment of the present application, a partition is provided inside the shell to divide the shell into two parts, and an anti-corrosion material is provided on the inner wall of the shell.

[0017] The separator can divide the battery into different areas, which helps to improve the stability and safety of the battery structure. The anti-corrosion material on the inner wall can protect the inside of the shell from corrosion by chemicals, extend the battery life and improve safety.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The one-piece injection-molded shell can improve mechanical strength and sealing, and reduce looseness and leakage problems between components. A partition is set inside to divide the inside of the shell into two parts, which helps to optimize the internal structure of the battery and improve stability and safety. Anti-corrosion materials are set on the inner wall of the shell to extend the service life of the battery and reduce the impact of chemical corrosion on the battery. At the same time, heat dissipation related structures are set to solve the problem of heat dissipation, solving the above-mentioned technical problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of a lithium-sulfur battery bracket structure of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the support cover body of the utility model.

[0022] Figure 3 The utility model is a structural schematic diagram of a lithium-sulfur battery.

[0023] Figure 4 It is a structural schematic diagram of the battery body of the utility model.

[0024] In the figure: base 1, bracket cover 2, battery body 3, base body 11, heat dissipation cavity 12, sealing cover 21, positioning bracket 22, positioning bolt 23, electrode connecting end 24, flexible limit block 25, shell 31, heat conduction and heat dissipation block 32, sealing inner cover 33, electrode contact block 34. DETAILED DESCRIPTION

[0025] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0026] Example 1

[0027] The applicant believes that the components in lithium-sulfur batteries, especially the sulfur positive electrode and lithium negative electrode materials, have large volume changes and mechanical stresses, which may cause deformation or fatigue of the internal components of the battery during the charging and discharging process, thereby reducing the strength and stability of the structure. The structural strength and protection of the battery will directly affect the subsequent performance. At the same time, since lithium-sulfur batteries generate heat during the charging and discharging process, and the solid electrolyte interface problems between the sulfur positive electrode and the lithium negative electrode can also cause local overheating, poor heat dissipation may cause the battery temperature to rise, thereby affecting its performance and safety.

[0028] To this end, the applicant designed a lithium-sulfur battery support structure, such as Figure 1 to Figure 2 As shown, it includes: a base 1 and a bracket cover 2. The size of the base 1 is adapted to the lithium-sulfur battery and is used to support the entire bracket structure. The bracket cover 2 and the base 1 are located on the same vertical line to form a cavity, providing a battery installation area. The cavity is located between the bracket cover 2 and the base 1, providing an installation space for the battery. The surface of the base 1 and the bracket cover 2 is provided with an anti-corrosion coating to prevent corrosion and increase the service life of the bracket. The bracket cover 2 and the base 1 are made of rigid materials to ensure the stability and durability of the bracket.

[0029] In the above embodiment, further, the base 1 includes: a base body 11 and a heat dissipation cavity 12. A battery placement area is provided inside the base body 11, and the edge forms a fully enclosed protective edge for supporting and fixing the battery. The heat dissipation cavity 12 is opened at the bottom of the base body 11 for heat dissipation, which can improve the heat dissipation effect of the battery when working.

[0030] In the above embodiment, further, the bracket cover 2 includes: a sealing cover 21, a positioning bracket 22, a positioning bolt 23, an electrode connection end 24 and a flexible limit block 25. The sealing cover 21 is clamped with the end of the battery away from the base 1 to seal and protect the battery. The positioning bracket 22 is arranged in the middle position of the two long diameter directions of the sealing cover 21 and is welded on the sealing cover 21 to support and position the battery. The positioning bolt 23 connects the positioning bracket 22 and the bolt of the base 1 to fix the position of the bracket. The electrode connection end 24 is arranged on the inner side of the sealing cover 21 to connect the electrode. The positioning bolt 23 passes through the positioning bracket 22 and is fixed to the base 1 to stabilize the bracket structure. The flexible limit block 25 ensures the tightness and comprehensiveness of the connection.

[0031] In the above embodiment, further, the positioning bracket 22 is an L-shaped structure, wherein the short diameter portion is welded to the sealing cover 21 , and the long diameter portion is provided with a hole cavity adapted to the size of the positioning bolt 23 .

[0032] Example 2

[0033] A lithium-sulfur battery comprises the lithium-sulfur battery support structure mentioned in Example 1, such as Figure 3 to Figure 4 As shown, it also includes: a battery body 3; the battery body 3 includes: a shell 31, a heat-conducting heat-dissipating block 32, a sealed inner cover 33 and an electrode contact block 34. The shell 31 is integrally injection-molded, and a lithium-sulfur battery placement area is provided inside to accommodate the battery assembly. The heat-conducting heat-dissipating block 32 is fixed to the shell 31 for heat dissipation and helps control the temperature of the battery. The sealed inner cover 33 is located inside the shell 31 to seal and protect the lithium-sulfur battery and protect the battery assembly from the external environment. The electrode contact block 34 is located on the inner side of the shell 31, opposite to the electrode connection terminal 24, and is used to stabilize the position of the electrode and ensure good electrode contact.

[0034] In the above embodiment, further, a partition is provided inside the shell 31 of the lithium-sulfur battery to divide the inside of the shell 31 into two parts, and an anti-corrosion material is provided on the inner wall of the shell 31 .

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A lithium-sulfur battery support structure, characterized in that: include: Base; The support cover body is adapted to the size of the base and is located on the same vertical line as the base; A cavity is formed between the bracket cover and the base, and the cavity provides a battery installation area; The surfaces of the base and the support cover are provided with anti-corrosion coatings and are made of rigid materials.

2. A lithium-sulfur battery support structure according to claim 1, characterized in that: The base comprises: The base body has a battery placement area inside and a fully enclosed protective edge at the edge; A heat dissipation cavity is provided at the bottom end of the base body; At least two heat dissipation cavities are symmetrically arranged along the vertical center line of the base body.

3. A lithium-sulfur battery support structure according to claim 1, characterized in that: The support cover comprises: A sealing cover body, clamped with an end of the battery away from the base; A positioning bracket, arranged in the middle of the two long diameter directions of the sealing cover body and welded to the sealing cover body; A positioning bolt connected to the positioning bracket and the base; The electrode connection end is arranged inside the sealing cover; A flexible limit block, fixed to the sealing cover body, to ensure contact tightness; The positioning bolt passes through the positioning bracket and is fixed to the base.

4. A lithium-sulfur battery support structure according to claim 3, characterized in that: The positioning bracket is L-shaped, the short diameter portion is welded to the sealing cover body, and the long diameter portion is provided with a hole cavity matched with the size of the positioning bolt.

5. A lithium-sulfur battery, comprising the lithium-sulfur battery support structure according to any one of claims 1 to 4, characterized in that: Also includes: Battery body; The battery body comprises: The housing is integrally injection molded and has a lithium-sulfur battery placement area inside; A heat-conducting heat sink block, fixed to the housing and used for heat dissipation; A sealed inner cover, located inside the shell, for sealing and protecting the lithium-sulfur battery; The electrode contact block is located inside the shell and opposite to the electrode connection end.

6. A lithium-sulfur battery according to claim 5, characterized in that: A partition is arranged inside the shell to divide the shell into two parts, and an anti-corrosion material is arranged on the inner wall of the shell.

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