Battery structure with bottom heat conduction and leakage prevention

Abstract

The present application relates to a battery structure with bottom heat conduction and leakage prevention, the battery structure comprising a case body, a battery cell module and a thermally conductive silicone tray; the battery cell module and the thermally conductive silicone tray are both arranged in the case body; the thermally conductive silicone tray is sleeved on the bottom portion of the battery cell module; the thermally conductive silicone tray abuts against the battery cell module and the bottom portion of the case body separately; the thermally conductive silicone tray comprises a thermally conductive silicone sheet and an insulating member, and the insulating member encloses the periphery of the thermally conductive silicone sheet to form a side plate structure; a plurality of recesses are provided on the side surface of the thermally conductive silicone sheet close to the battery cell module. The present utility model features a simple structure, good heat dissipation effect, convenient disassembly and assembly, convenient maintenance and good stability, and ensures cost-effectiveness, safety and practicality, thereby well satisfying the requirements of actual use.

Description

A bottom-heat-conducting and leak-proof battery structure Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery structure with bottom heat conduction and leak prevention. Background Technology

[0002] With the in-depth development of new energy industries such as energy storage, photovoltaics, and wind power, multiple new energy sources are integrating with each other to form complementary energy stations.

[0003] Currently, conventional PACK modules simply have epoxy boards or PC insulating sheets directly attached to the bottom, which only provide insulation and do not offer leak prevention or heat conduction. Furthermore, due to the limitations of the PACK module structure, the battery cells can only be placed on their side or lying flat, affecting their optimal usage. This also places the cells close to the chassis bottom plate, meaning that leaks can flow directly to the chassis bottom, potentially causing short circuits and fires, posing a certain risk and reducing the lifespan of the battery cells.

[0004] Utility Model Content

[0005] Based on this, the present invention provides a bottom-heat-conducting and leak-proof battery structure, which aims to solve the problems of existing PACK modules that can only be placed on their side or lying down, and that leakage will directly flow to the bottom of the chassis, which may react with the chassis and cause short circuits and fires, posing certain risks.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bottom-heat-conducting and leak-proof battery structure, comprising a housing, a cell module, and a thermally conductive silicone pad; the cell module and the thermally conductive silicone pad are both disposed within the housing; the thermally conductive silicone pad is sleeved on the bottom of the cell module; the thermally conductive silicone pad abuts against the bottom of both the cell module and the housing.

[0007] The thermally conductive silicone pad includes a thermally conductive silicone sheet and an insulating sheet. The insulating sheet surrounds the thermally conductive silicone sheet to form a side plate structure. Several grooves are provided on the side of the thermally conductive silicone sheet near the battery cell module.

[0008] In a preferred embodiment, the length of the thermally conductive silicone pad is greater than the length of the battery cell module, and the width of the thermally conductive silicone pad is greater than the width of the battery cell module.

[0009] In a preferred embodiment, a gap is provided between each end of the groove and the insulating sheet; the grooves are arranged at equal intervals and are arranged parallel to each other.

[0010] In a preferred embodiment, the thermally conductive silicone sheet and the insulating sheet are integrally formed.

[0011] In a preferred embodiment, the insulating sheet is a PC insulating sheet.

[0012] In a preferred embodiment, an NTC acquisition board is provided on the top of the battery cell module, and the NTC acquisition board is adapted to the battery cell module; a cover plate is provided on the top of the housing.

[0013] In a preferred embodiment, the NTC acquisition board includes a fixing part disposed on one side of the battery cell module and a plurality of connecting parts disposed on the top of the battery cell module. One end of each connecting part is connected to the fixing part, and the connecting part and the fixing part are integrally formed. The plurality of connecting parts are arranged parallel to each other.

[0014] In a preferred embodiment, the fixing part is a T-shaped fixing part, including an integrally formed parallel part and a vertical part; the parallel part is connected to each of the connecting parts; and a connecting terminal is provided on the side of the vertical part away from the battery cell module.

[0015] In a preferred embodiment, the plurality of connecting parts are arranged at equal intervals; each connecting part has a plurality of acquisition parts on both sides, and the acquisition parts are connected to the corresponding battery cell module.

[0016] In a preferred embodiment, the acquisition unit and the connection unit are integrally formed; the acquisition unit is correspondingly arranged with the battery cell module.

[0017] In a preferred embodiment, the connecting part is provided with a through hole adapted to the explosion-proof valve of the battery cell module, and the through hole is adapted to the battery cell module.

[0018] The beneficial effects achieved by this utility model are as follows: By setting a thermally conductive silicone pad at the bottom of the battery cell module, the heat of the module can be effectively conducted to the housing, facilitating heat dissipation. Simultaneously, using a PC insulating sheet with folded edges to wrap the thermally conductive silicone to form a side plate prevents electrolyte leakage from the battery cell, avoiding electrolyte corrosion of the housing surface and short circuits, effectively reducing heat dissipation problems and battery cell leakage issues in the PACK module. By setting an NTC acquisition board at the top of the battery cell module, the delay in nickel sheet conduction can be avoided, and the reliability of laser welding connections can be judged by temperature. It also solves the problem that individual battery cells in the middle of the module cannot be acquired using NTC, effectively acquiring the temperature of individual battery cells in the middle of the module for more effective temperature control management. This utility model has a simple structure, good heat dissipation, convenient assembly and disassembly, easy maintenance, good stability, and is economical, safe, and practical, well meeting the needs of actual use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 is a schematic diagram of the overall structure of a bottom heat-conducting and leak-proof battery structure according to an embodiment of the present invention.

[0021] Figure 2 is an exploded structural diagram of the bottom heat-conducting and leak-proof battery structure in Figure 1;

[0022] Figure 3 is a schematic diagram of the structure of the thermally conductive silicone pad in Figure 2;

[0023] Figure 4 is a partial internal structure diagram of the bottom heat-conducting and leak-proof battery structure in Figure 1.

[0024] Figure 5 is a schematic diagram of the NTC acquisition board shown in Figure 4.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Specifically, as shown in Figures 1 to 3, the present invention proposes the following technical solution: a bottom-heat-conducting and leak-proof battery structure, comprising a housing 10, a battery cell module 20, and a thermally conductive silicone pad 30; the battery cell module 20 and the thermally conductive silicone pad 30 are both disposed within the housing 10; the thermally conductive silicone pad 30 is sleeved on the bottom of the battery cell module 20; the thermally conductive silicone pad 30 abuts against the battery cell module 20 and the bottom 11 of the housing 10 respectively;

[0032] The thermally conductive silicone pad 30 includes a thermally conductive silicone sheet 31 and an insulating sheet 32. The insulating sheet 32 ​​surrounds the thermally conductive silicone sheet 31 to form a side plate structure. Several grooves 311 are provided on the side of the thermally conductive silicone sheet 31 near the battery cell module 20.

[0033] This application provides a thermally conductive silicone pad 30 at the bottom of the battery cell module 20, which effectively conducts the heat of the module to the housing, facilitating heat dissipation. At the same time, the side plate is formed by wrapping the thermally conductive silicone pad with a folded edge of a PC insulating sheet, which can prevent electrolyte leakage from the battery cell and avoid short circuits caused by electrolyte corrosion of the housing surface. This effectively reduces the problems of heat dissipation of the PACK module and leakage of battery cells.

[0034] In a preferred embodiment, the length of the thermally conductive silicone pad 30 is greater than the length of the battery cell module 20, and the width of the thermally conductive silicone pad 30 is greater than the width of the battery cell module 20. This arrangement further prevents electrolyte leakage, providing a dual protection.

[0035] In a preferred embodiment, a gap is provided between each end of the groove 311 and the insulating sheet 32; several grooves 311 are equally spaced and arranged parallel to each other. By setting the gaps, using several grooves 311, and controlling their arrangement, the electrolyte leaking from the battery module 20 can flow smoothly into the grooves 311 and accumulate, preventing electrolyte from seeping from the sides and corroding the casing.

[0036] In a preferred embodiment, the thermally conductive silicone sheet 31 and the insulating sheet 32 ​​are integrally formed. This arrangement further prevents leakage.

[0037] In a preferred embodiment, the insulating sheet 32 ​​is a PC insulating sheet. Using a combination of a PC insulating sheet and thermally conductive silicone effectively conducts heat from the battery module 20 to the housing 10, facilitating heat dissipation from the battery module 20.

[0038] As a preferred embodiment, as shown in Figures 2, 4 and 5, an NTC acquisition board 40 is provided on the top of the battery cell module 20, and the NTC acquisition board 40 is adapted to the battery cell module 20; a cover plate 50 is provided on the top of the housing 10.

[0039] In a preferred embodiment, the NTC acquisition board 40 includes a fixing part 41 disposed on one side of the battery cell module 20 and a plurality of connecting parts 42 disposed on the top of the battery cell module 20. One end of each connecting part 42 is connected to the fixing part 41, and the connecting part 42 and the fixing part 41 are integrally formed; the plurality of connecting parts 42 are arranged parallel to each other.

[0040] This configuration allows the NTC acquisition board 40 to be directly attached to the surface of the battery cell, solving the problem that the middle battery cell cannot be acquired via NTC after the modules are assembled. At the same time, it avoids the problem of nickel strip conduction and glue fixing to the surface of the battery cell, solving the temperature delay problem. It can effectively acquire the temperature of the battery cell in the middle of the module and monitor the real-time temperature of the battery cell. It can avoid the delay of nickel strip conduction, and can judge the reliability of laser welding connection through temperature, thus enabling more effective temperature control management.

[0041] In a preferred embodiment, the fixing part 41 is a T-shaped fixing part, including an integrally formed parallel part 411 and a vertical part 412; the parallel part 411 is connected to each of the connecting parts 42; and the vertical part 412 is provided with a connecting terminal 413 on the side away from the battery cell module 20.

[0042] In a preferred embodiment, the plurality of connecting portions 42 are arranged at equal intervals; each connecting portion 42 has a plurality of collecting portions 421 on both sides, and the collecting portions 421 are connected to the corresponding battery cell module 20.

[0043] In a preferred embodiment, the acquisition unit 421 and the connection unit 42 are integrally formed; the acquisition unit 421 is correspondingly arranged with the battery cell module 20.

[0044] In this embodiment, the connecting portion 42 is provided with a through hole 422 adapted to the explosion-proof valve of the battery cell module 20, and the through hole 422 is adapted to the battery cell module 20. In this way, while ensuring better temperature control management, the battery cell module can achieve normal operation according to conventional settings.

[0045] This utility model has a simple structure, good heat dissipation, convenient disassembly and assembly, easy maintenance, good stability, and is economical, safe and practical, which can well meet the needs of actual use.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery structure with bottom heat conduction and leak prevention, characterized in that, The device includes a housing, a battery cell module, and a thermally conductive silicone pad; both the battery cell module and the thermally conductive silicone pad are disposed within the housing; the thermally conductive silicone pad is fitted onto the bottom of the battery cell module; the thermally conductive silicone pad is respectively positioned to abut against the bottom of the battery cell module and the bottom of the housing. The thermally conductive silicone pad includes a thermally conductive silicone sheet and an insulating sheet. The insulating sheet surrounds the thermally conductive silicone sheet to form a side plate structure. Several grooves are provided on the side of the thermally conductive silicone sheet near the battery cell module.

2. The bottom thermally-conductive leak-proof battery structure according to claim 1, wherein, The length of the thermally conductive silicone pad is greater than the length of the battery cell module, and the width of the thermally conductive silicone pad is greater than the width of the battery cell module.

3. The bottom thermally-conductive leak-proof battery structure according to claim 1, wherein, Each groove has a gap between its two ends and the insulating sheet; the grooves are evenly spaced and arranged parallel to each other.

4. The bottom thermally-conductive leak-proof battery structure according to claim 1, wherein, The thermally conductive silicone pad and the insulating pad are integrally formed; the insulating pad is a PC insulating pad.

5. The bottom thermally-conductive leak-proof battery structure according to claim 1, wherein, The top of the battery cell module is equipped with an NTC acquisition board, which is adapted to the battery cell module; the top of the housing is covered with a cover plate.

6. The bottom thermally-conductive leak-proof battery structure according to claim 5, wherein, The NTC acquisition board includes a fixing part disposed on one side of the battery cell module and a plurality of connecting parts disposed on the top of the battery cell module. One end of each connecting part is connected to the fixing part, and the connecting part and the fixing part are integrally formed. The plurality of connecting parts are arranged parallel to each other.

7. The bottom thermally-conductive leak-proof battery structure according to claim 6, wherein, The fixing part is a T-shaped fixing part, including an integrally formed parallel part and a vertical part; the parallel part is connected to each of the connecting parts; the vertical part has a connecting terminal on the side away from the battery cell module.

8. The bottom thermally-conductive leak-proof battery structure according to claim 6, wherein, Multiple connecting parts are equally spaced; each connecting part has multiple acquisition units on both sides, and the acquisition units are connected to the corresponding battery cell module.

9. The bottom thermally-conductive leak-proof battery structure according to claim 8, wherein, The acquisition unit and the connection unit are integrally formed; the acquisition unit is correspondingly arranged with the battery cell module.

10. The bottom thermally-conductive leak-proof battery structure of claim 8, wherein, The connecting part is provided with a through hole adapted to the explosion-proof valve of the battery cell module, and the through hole is adapted to the battery cell module.

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