Flame-proof and explosion-proof battery pack structure

Abstract

The utility model relates to the technical field of batteries, in particular to a flame-proof and explosion-proof battery pack structure which comprises a battery module main body and a battery pack shell made of a metal material, and the battery module main body is mounted in the battery pack shell; a heat-conducting insulating layer is arranged between the battery module main body and the battery pack shell, the battery module main body is wrapped in the heat-conducting insulating layer, and the heat of the battery penetrates through the heat-conducting insulating layer and is discharged through a heat dissipation hole group formed in the top wall of the battery pack shell. The battery pack shell made of the metal material is arranged, and the heat-conducting silicon insulating polymer rubber material is injected between the battery pack shell and the battery module to form the heat-conducting insulating layer, so that the internal battery module and external air are isolated, and heat conduction obstruction is reduced; and the heat generated by the battery is rapidly transferred to the metal shell and the heat dissipation hole group, so that the vertical conduction of the heat is optimized, rapid heat dissipation is realized, and the heat management performance of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a kind of fire and explosion-proof battery pack structure. BACKGROUND

[0002] Battery working heat generation is the common problem of current battery, and it is necessary to dissipate heat for battery to maintain good working temperature and maintain the stability of battery system. Battery heat dissipation technology, also known as thermal management cooling technology, is essentially a heat exchange process in which the heat inside the battery is transferred to the outside environment by a cooling medium, thereby reducing the internal temperature of the battery. It is widely used in power batteries, energy storage batteries, especially in container-type energy storage systems.

[0003] The current mature heat dissipation system is air cooling, liquid cooling and phase change material cooling according to the heat transfer medium.

[0004] However, when the battery is normally working and generating heat, the battery cannot be quickly cooled by the fan, and the flammable gas generated by the short circuit inside the battery can easily explode when mixed with air, affecting the safety of the surrounding batteries. Although liquid cooling is more direct, efficient and closed, liquid cooling requires high sealing performance and high manufacturing cost.

[0005] Based on the problems in the prior art, the utility model provides a fire and explosion-proof battery pack structure. UTILITY MODEL CONTENT

[0006] The utility model aims to provide a fire and explosion-proof battery pack structure to solve the technical problems of air cooling and liquid cooling not being timely, high cost and lack of fire and explosion-proof measures in the prior art.

[0007] The technical solution of the utility model is: a fire and explosion-proof battery pack structure, comprising a battery module main body and a battery pack shell made of metal, the battery module main body is installed inside the battery pack shell.

[0008] A heat-conducting insulating layer is provided between the battery module main body and the battery pack shell, the battery module main body is wrapped in the heat-conducting insulating layer, and the battery heat is discharged through the heat-conducting insulating layer and the heat dissipation holes arranged on the top wall of the battery pack shell.

[0009] Preferably, a gap space is provided between the outer wall surface of the battery module main body and the inner wall of the battery pack shell, and an elastic solid layer formed by injecting heat-conducting silicon insulating high polymer rubber material into the gap space and solidifying is configured as the heat-conducting insulating layer, so that the battery module main body is isolated from the external air.

[0010] Preferably, a glue injection hole is provided at the top of the battery pack shell, and heat-conducting silicon insulating high polymer rubber material is injected into the gap space through the glue injection hole.

[0011] Preferably, a liquid cooling pipeline is provided on the bottom plate surface of the battery shell.

[0012] Preferably, each heat dissipation hole group includes a plurality of channels, and the heat of the battery rises and moves and is discharged through the channels to form a vertical heat flow path.

[0013] Preferably, the battery module body includes a plurality of battery modules, and one battery module includes a plurality of single batteries arranged in a row.

[0014] Preferably, the battery shell is made of aluminum alloy or steel.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) The present application provides a metal battery shell and injects a heat-conducting silicone insulating polymer rubber material between the battery shell and the battery module to form a heat-conducting insulating layer, thereby achieving a near-vacuum state inside the battery pack, isolating the internal battery module from the outside air, reducing heat conduction obstacles, and reducing the possibility of explosion incidents caused by combustible gas generated by battery short circuit. In addition, through the efficient thermal conductivity of the heat-conducting material, the heat generated by the battery is quickly transferred to the metal shell and the heat dissipation hole group, thereby optimizing the vertical conduction of heat and achieving rapid heat dissipation, thereby improving the thermal management performance of the battery pack.

[0017] (2) This application provides a thermally conductive insulating layer made of thermally conductive silicone insulating polymer rubber material to play an isolating and elastic buffering role, thereby reducing the harm caused by a single faulty battery to surrounding batteries and eliminating the risk of battery explosion in energy storage power stations.

[0018] (3) This application sets a thermal insulation layer of thermally conductive silicone insulating polymer rubber material, which not only has a high thermal conductivity coefficient, but also maintains good electrical insulation performance, avoiding safety hazards caused by poor contact or leakage. At the same time, its anti-vibration and durability also ensure the stability and safety of the battery pack during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the three-dimensional axial structure of a flameproof and explosion-proof battery pack structure described in the present invention;

[0021] Figure 2 This is a bottom schematic diagram of a flameproof and explosion-proof battery pack structure according to the present invention;

[0022] Figure 3 This is a schematic diagram of the top surface of the battery shell of the present invention;

[0023] Figure 4 This is a schematic structural diagram of the heat-conducting insulating layer of the present invention;

[0024] Among them: 1. Battery shell; 2. Battery module body; 3. Thermal insulation layer; 4. Heat dissipation hole group; 5. Glue injection hole; 6. Liquid cooling pipeline. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0026] Battery cooling technology, also known as thermal management cooling technology, is essentially a heat exchange process that transfers heat from the battery to the external environment through a cooling medium, thereby reducing the internal battery temperature. It is widely used in power batteries and energy storage batteries, especially in containerized energy storage systems. However, liquid cooling requires high structural sealing and is costly to manufacture.

[0027] like Figure 1 As shown, the present application provides a flameproof and explosion-proof battery pack structure, including a battery module body 2 and a metal battery pack shell 1, the battery module body 2 is installed inside the battery pack shell; Figure 3 As shown, a thermally conductive insulating layer 3 is provided between the battery module body 2 and the battery shell 1. The battery module body 2 is wrapped in the thermally conductive insulating layer 3. The heat of the battery passes through the thermally conductive insulating layer 3 and is discharged through the heat dissipation hole group 4 provided on the top wall of the battery shell 1.

[0028] Refer to the attached Figure 4 In the partial cross-sectional view, a gap space is provided between the outer wall surface of the battery module body 2 and the inner wall of the battery shell 1, and a glue injection hole 5 is provided on the top of the battery shell 1. The thermal conductive silicone insulating polymer rubber material is injected into the gap space at room temperature through the glue injection hole 5. The elastic solid layer formed after the thermal conductive silicone insulating polymer rubber material is cured is constructed as a thermal conductive insulating layer 3, so that the battery module body 2 is isolated from the external air.

[0029] Among them, thermally conductive silicone insulating polymer rubber material is made of special silicone rubber combined with other polymers and polymer materials through polymer alloy technology. Its basic structural unit is composed of silicon-oxygen chain links, and the side chains are connected to various other organic groups through silicon atoms. Therefore, its structure contains both "organic groups" and "inorganic structures", combining the characteristics of organic matter and the functions of inorganic matter.

[0030] During normal operation, the heat from the batteries can be dissipated outwards through the thermally conductive silicone insulating polymer rubber material, metal casing and air ducts. Once an internal short circuit occurs in the battery, the flammable gas generated can be prevented from coming into direct contact with the air, preventing an explosion. At the same time, a small gap (0.5mm) between batteries can prevent the heat from the faulty battery from being quickly transferred to adjacent batteries, causing secondary failures.

[0031] The thermally conductive insulating layer of the thermally conductive silicone insulating polymer rubber material forms a protective layer, isolating the battery module from the air and avoiding the possibility of combustible gas explosion in the event of a battery failure. Due to the isolation and elastic buffering effect of the thermally conductive silicone insulating polymer rubber material, the damage to surrounding batteries in the event of a battery failure is reduced.

[0032] A scale bar (not shown in the accompanying drawings) is provided on the outside of the battery pack shell 1, so that the user can intuitively observe the filling amount of the thermal conductive material inside the hole; it not only facilitates the user to accurately control the amount of material during the pouring process, but also helps to maintain the optimal thermal management state of the battery pack, ensuring the stability of battery performance and extending the service life.

[0033] Refer to the attached Figure 2 A liquid cooling pipe 6 is provided on the bottom plate of the battery shell 1. The top heat dissipation hole group and the bottom liquid cooling pipe jointly dissipate heat and cool the internal battery module body 2 to improve the heat dissipation efficiency.

[0034] The battery pack shell 1 is made of aluminum alloy or steel, and the battery pack is small and lightweight.

[0035] The battery module body 2 includes multiple battery modules, each of which consists of multiple individual batteries arranged in a row. Temperature differences between individual cells within a module are a significant factor affecting battery stability. Temperature differences outside a certain range can lead to internal charge and discharge imbalances, resulting in capacity deviations. Temperature differences can also increase the heat generation rate of cells near load points, potentially causing battery failure.

[0036] Taking into account the impact of the thermal conductive silicone insulating polymer rubber material on the heat dissipation effect of the battery after casting (within a controllable range), gaps are reserved between the batteries to form heat dissipation airways to increase the heat dissipation area and balance the battery temperature (temperature difference). The overall volume of the battery pack increases slightly but the heat dissipation effect is significantly improved.

[0037] As attached Figure 3 As shown in the figure, each heat dissipation hole group 4 on the top of the battery shell 1 includes multiple channels, which use the natural buoyancy principle of rising hot air to allow the battery heat to rise and move, and be discharged through the channels to form a vertical heat flow path, thereby improving the heat dissipation efficiency and ensuring that the heat generated by the battery during the charging and discharging process can quickly move upward and be quickly dissipated through the thermal conductive material and the metal shell.

[0038] The heat dissipation holes above the battery pack are cast with a thermally conductive silicone insulating polymer rubber material, creating a near-vacuum state inside. This not only reduces the potential safety hazard of explosions caused by flammable gases generated by a battery short circuit, but also rapidly transfers heat generated by the battery to the metal casing and airway through the highly efficient thermal conductivity of the thermally conductive material, achieving rapid heat dissipation.

[0039] After a battery failure or damage, you can remove the bad battery individually, clean the surrounding thermal conductive silicone insulating polymer rubber, replace it with a new battery, connect the plates, and repair the glue.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A flameproof and explosion-proof battery pack structure, characterized in that: The battery module comprises a main body and a metal battery shell, wherein the main body is installed inside the battery shell; A heat-conducting insulating layer is provided between the battery module body and the battery shell. The battery module body is wrapped in the heat-conducting insulating layer. The heat of the battery passes through the heat-conducting insulating layer and is discharged through the heat dissipation hole group provided on the top wall of the battery shell.

2. The flameproof and explosion-proof battery pack structure according to claim 1, characterized in that: A gap space is provided between the outer wall of the battery module body and the inner wall of the battery shell. The heat-conducting silicone insulating polymer rubber material injected into the gap space forms an elastic solid layer after solidification to form the heat-conducting insulating layer, so that the battery module body is isolated from the outside air.

3. The flameproof and explosion-proof battery pack structure according to claim 2, characterized in that: A glue injection hole is provided on the top of the battery shell, and a heat-conducting silicon insulating polymer rubber material is injected into the gap space through the glue injection hole.

4. The flameproof and explosion-proof battery pack structure according to claim 2, characterized in that: A liquid cooling pipeline is provided on the bottom plate surface of the battery shell.

5. The flameproof and explosion-proof battery pack structure according to claim 1, characterized in that: Each heat dissipation hole group includes multiple channels. The heat of the battery rises and moves and is discharged through the channels, forming a vertical heat flow path.

6. The flameproof and explosion-proof battery pack structure according to claim 1, characterized in that: The battery module body includes a plurality of battery modules, and one battery module includes a plurality of single batteries arranged in a row.

7. The flameproof and explosion-proof battery pack structure according to claim 1, characterized in that: The battery shell is made of aluminum alloy or steel.

Images