A high-safety sheet metal enclosure mounting structure for energy storage battery modules

Abstract

This utility model discloses a high-safety sheet metal enclosure mounting structure for an energy storage battery module, including an enclosure body with a battery receiving cavity inside. A secondary battery module is housed within the battery receiving cavity, and the secondary battery module is secured within the battery receiving cavity by a composite pressure strip structure. This composite pressure strip structure includes a metal pressure strip body and an elastic silicone sheet adhered to the back of the metal pressure strip body. This high-safety sheet metal enclosure mounting structure for an energy storage battery module features reliable fixing, good thermal conductivity, and a high heat distortion temperature.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, specifically to a high-safety sheet metal enclosure mounting structure for energy storage battery modules. Background Technology

[0002] Energy storage batteries, often referred to as energy storage batteries, are devices capable of storing energy for later use. They play a crucial role in modern power systems and the renewable energy sector, especially with the increasing prevalence of solar and wind power. The primary goal of energy storage batteries is to address the mismatch between energy supply and demand by storing excess energy for release during peak demand periods, thus ensuring grid stability and efficient energy utilization.

[0003] To improve the structural stability of energy storage battery packs, Chinese utility model CN223109117U discloses a pressure strip structure for locking batteries in energy storage sheet metal boxes. This pressure strip structure is a U-shaped structure, including a bottom fixing plate and two side plates. The side plates are inclined inverted U-shaped structures, and the internal gaps of the inverted U-shaped structures form voltage acquisition line storage holes. This utility model's pressure strip structure for locking batteries in energy storage sheet metal boxes features high structural stability, good storage capacity, and simplicity and convenience.

[0004] However, in this utility model, to avoid installing a plastic plate between the pressure strip and the battery, the insulating plate is made of plastic, and the pressure strip structure is also made of plastic. The pressure strip is made of plastic (such as ABS / PC / PVC), which is prone to fatigue deformation or breakage when subjected to the thermal expansion forces generated by battery charging and discharging and transportation vibrations over a long period. In particular, the inclined design of the inverted "U"-shaped side plate concentrates stress at the corners, which may accelerate cracking, creating a structural weakness. The plastic pressure strip itself is heat-insulating, and the superimposed insulating plate further blocks heat dissipation, affecting battery life and safety. Furthermore, the insulating plate is made of low-temperature resistant plastic (such as PVC), which may soften and deform at high temperatures, losing its insulating protection function. Considering all these factors, the energy storage battery pack of this utility model still has certain safety hazards that require sufficient attention. Utility Model Content

[0005] The purpose of this utility model is to provide a highly safe sheet metal enclosure mounting structure for energy storage battery modules, which features reliable fixing effect, good thermal conductivity and high thermal deformation temperature.

[0006] This utility model can be achieved through the following technical solutions:

[0007] This utility model relates to a high-safety sheet metal enclosure mounting structure for an energy storage battery module, comprising an enclosure body, a battery housing cavity within the enclosure body, a secondary battery module within the battery housing cavity, and a composite pressure strip structure that locks the secondary battery module in the battery housing cavity. The composite pressure strip structure comprises a metal pressure strip body and an elastic silicone sheet that is attached to the back of the metal pressure strip body.

[0008] Furthermore, an adhesive layer is provided on the contact surface between the elastic silicone sheet and the metal pressure strip body, and the elastic silicone sheet and the metal pressure strip body are integrally bonded together through the adhesive layer. By adopting an integrally bonded structure, the metal pressure strip body and the elastic silicone sheet are tightly bonded together, avoiding softening and deformation that could affect the safety of the energy storage battery module.

[0009] Furthermore, the metal strip body can be made of aluminum alloy or stainless steel. Aluminum alloy strips are lightweight (density 2.7g / cm³), easy to process, corrosion resistant (surface anodized), and have good thermal conductivity (≈150W / m·K), while stainless steel strips are high-strength, corrosion resistant (salt spray environment), and have excellent fire resistance. The appropriate option can be selected based on the specific requirements.

[0010] Furthermore, the shape of the elastic silicone sheet is consistent with the shape of the metal strip body, and positioning holes corresponding to the mounting holes of the metal strip body are provided in the elastic silicone sheet. Because the elastic silicone sheet and the metal strip body are identical in shape, they have better dimensional matching and can be locked and fixed without secondary processing.

[0011] Furthermore, the secondary battery is a lithium-ion battery and / or a sodium-ion battery.

[0012] Furthermore, lithium-ion batteries can be classified as lithium iron phosphate batteries, lithium manganese oxide batteries, lithium cobalt oxide batteries, or ternary lithium batteries. Different types of lithium-ion batteries have different application scenarios and energy density requirements, allowing for flexible selection based on actual needs.

[0013] Furthermore, sodium-ion batteries can be made of polyanion-type materials, layered oxide materials, or Prussian blue materials. Different types of sodium-ion batteries have different application scenarios and energy density requirements, allowing for flexible selection based on actual needs.

[0014] Furthermore, the secondary batteries are either square aluminum-cased batteries or square aluminum-plastic film batteries. Both square aluminum-cased batteries and square aluminum-plastic film batteries are conventional battery shapes, offering good size matching and selectivity, and facilitating the processing and design of energy storage battery modules.

[0015] Furthermore, the main body of the enclosure is made of stainless steel.

[0016] Furthermore, the elastic silicone sheet can be a pure silicone sheet, a fiberglass cloth-reinforced silicone sheet, or a metal foil sandwich silicone sheet. Specifically, a single-layer silicone sheet (1-3 mm thick) has a thermal conductivity of 1.0-3.0 W / (m·K); a fiberglass cloth-reinforced silicone sheet uses a silicone + fiberglass mesh structure and has a thermal conductivity of 1.5-4.0 W / (m·K); a metal foil sandwich silicone sheet uses a copper foil / aluminum foil + double-sided silicone layer structure and has a thermal conductivity of 2.0-5.0 W / (m·K). The appropriate type can be flexibly selected according to actual needs.

[0017] This utility model provides a high-safety sheet metal enclosure mounting structure for energy storage battery modules, which has the following beneficial effects:

[0018] First, the locking effect is reliable. The composite pressure strip structure uses a metal pressure strip body, which has higher mechanical strength and deformation resistance compared to existing plastic pressure strips. With the buffering effect of the elastic silicone sheet, it has a better locking effect on the battery module.

[0019] Secondly, it has good thermal conductivity. The composite pressure strip structure adopts a composite structure of metal pressure strip body and elastic silicone sheet. Compared with the existing plastic materials, the thermal conductivity of ordinary plastic (ABS / PC, etc.) is 0.1-0.3 W / (m·K), silicone sheet is 1.0-5.0 W / (m·K), and aluminum metal is 150-200 W / (m·K). The thermal conductivity is significantly improved, which effectively ensures the heat conduction and heat dissipation effect of battery module.

[0020] Third, it has a high heat distortion temperature. In composite strip structures, in addition to its excellent thermal conductivity, the elastic silicone sheet has a heat distortion temperature >250℃ (0.45MPa load), while for ordinary plastics, ABS is 85-95℃, PC is 130-140℃, and PP is 100-110℃. Silicone's heat resistance is significantly better than that of ordinary plastics. Attached Figure Description

[0021] Appendix Figure 1 This is an exploded view of the sheet metal housing installation structure of a high-safety energy storage battery module according to this utility model.

[0022] Appendix Figure 2 This is an exploded view of the composite pressure strip structure of the sheet metal housing mounting structure for a high-safety energy storage battery module according to this utility model.

[0023] The markings in the attached diagram include: 100, housing body; 200, secondary battery module; 300, composite pressure strip structure; 310, metal pressure strip body; 320, elastic silicone sheet. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the product of this utility model will be further described in detail below with reference to embodiments.

[0025] like Figures 1-2 As shown, the high-safety energy storage battery module sheet metal housing installation structure of this utility model includes a housing body 100, a battery receiving cavity is provided inside the housing body 100, a secondary battery module 200 is provided in the battery receiving cavity, the secondary battery module 200 is locked in the battery receiving cavity by a composite pressure strip structure 300, the composite pressure strip structure 300 includes a metal pressure strip body 310 and an elastic silicone sheet 210 attached to the back of the metal pressure strip body 310.

[0026] To ensure the structural stability of the composite pressure strip structure, an adhesive layer (not shown in the figure, representing the interface between the two) is provided on the contact surface between the elastic silicone sheet 320 and the metal pressure strip body 310. The elastic silicone sheet and the metal pressure strip body are integrally bonded together through the adhesive layer. Simultaneously, the shape of the elastic silicone sheet is consistent with the shape of the metal pressure strip body, and positioning holes corresponding to the mounting holes of the metal pressure strip body are provided in the elastic silicone sheet.

[0027] To ensure the mechanical strength of the composite pressure strip structure, the metal pressure strip body is made of aluminum alloy or stainless steel.

[0028] This utility model has good applicability. Specifically, the secondary battery is a lithium-ion battery and / or a sodium-ion battery. For example, the lithium-ion battery is a lithium iron phosphate battery, a lithium manganese oxide battery, a lithium cobalt oxide battery, or a ternary material battery; the sodium-ion battery is a polyanion battery, a layered oxide battery, or a Prussian blue battery; the secondary battery is a square aluminum shell battery or a square aluminum-plastic film battery.

[0029] To ensure the protection of the battery module, the casing is made of stainless steel.

[0030] To ensure the thermal conductivity of the silicone sheet, the elastic silicone sheet can be a pure silicone sheet, a fiberglass cloth reinforced silicone sheet, or a metal foil sandwich silicone sheet.

[0031] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The above embodiments are merely specific examples of this utility model, and their descriptions are quite specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. A high-safety sheet metal enclosure mounting structure for an energy storage battery module, comprising an enclosure body, wherein a battery receiving cavity is provided within the enclosure body, characterized in that: The battery housing cavity is provided with a secondary battery module, which is locked in the battery housing cavity by a composite pressure strip structure. The composite pressure strip structure includes a metal pressure strip body and an elastic silicone sheet attached to the back of the metal pressure strip body.

2. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 1, characterized in that: The contact surface between the elastic silicone sheet and the metal strip body is provided with an adhesive layer, and the elastic silicone sheet and the metal strip body are integrally bonded together through the adhesive layer.

3. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 2, characterized in that: The metal pressure strip body is made of aluminum alloy or stainless steel.

4. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 3, characterized in that: The elastic silicone sheet has the same shape as the metal strip body, and positioning holes are provided in the elastic silicone sheet that correspond to the mounting holes of the metal strip body.

5. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 4, characterized in that: The secondary battery is a lithium-ion battery and / or a sodium-ion battery.

6. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 5, characterized in that: The lithium-ion battery is a lithium iron phosphate battery, a lithium manganese oxide battery, a lithium cobalt oxide battery, or a ternary material battery.

7. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 5, characterized in that: The sodium-ion battery is a polyanion battery, a layered oxide battery, or a Prussian blue battery.

8. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 6 or 7, characterized in that: The secondary battery is a square aluminum-cased battery or a square aluminum-plastic film battery.

9. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 8, characterized in that: The main body of the enclosure is made of stainless steel.

10. The high-safety energy storage battery module sheet metal enclosure mounting structure according to claim 9, characterized in that: The elastic silicone sheet is a pure silicone sheet, a fiberglass cloth-reinforced silicone sheet, or a metal foil-core silicone sheet.

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