A battery pack filling structure

Abstract

A battery pack filling structure for the loading and unloading of a shelter, comprising a battery box, a battery assembly and a filling assembly, wherein the battery box is connected by a panel and a support rib to form a closed cavity with a receiving cavity inside; the battery assembly is embedded in the internal cavity of the battery box and fixed; the filling assembly is fixed inside the battery box and is separately arranged between the battery box and the battery assembly, and is in good heat exchange with the battery assembly and the battery box; the filling assembly comprises filling particles and filling glue, and through the filling assembly arranged between the battery assembly and the battery box and having good heat exchange with the battery assembly and the battery box, the heat generated during the charging and discharging process of the battery assembly can be promptly absorbed, transmitted and diffused, and overall and accurate control of the heat in the entire battery pack is realized.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, specifically to a battery pack filling mechanism. Background Technology

[0002] With the continuous development and popularization of new energy technologies, various new energy batteries are emerging like mushrooms after rain. However, due to differences in electrical parameters and volumetric structure design, batteries used in different products require multiple cells to be combined and packaged into a complete battery pack. In the specific production process, the packaging and filling structure of the battery pack is a crucial step in ensuring the safe discharge of the battery.

[0003] Currently, lithium-ion battery packs suitable for light electric vehicles face new requirements in terms of shock resistance, protection, waterproofing, and thermal conductivity due to the complex road conditions and high driving range demands of these vehicles. However, existing lithium-ion battery packs for light electric vehicles suffer from problems such as incomplete filling, poor heat dissipation, and high cost. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a battery pack filling structure that solves the issues of insufficient filling, poor heat dissipation, and high cost in existing lithium-ion battery pack filling structures suitable for light electric vehicles, thereby improving the battery pack's shock resistance, protection, waterproofness, and high thermal conductivity.

[0005] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:

[0006] A battery pack filling structure includes a battery housing, battery components, and a filling assembly. The battery housing is formed by connecting a panel and supporting ribs to create a sealed cavity for housing the battery components. The filling assembly is positioned between the battery housing and the battery components, ensuring good heat exchange between them. The filling assembly includes filler particles and filler adhesive, with the filler particles scattered in the gaps between the battery components and the battery housing. The filler adhesive is designed to cure after filling the space around the filler particles. Thus, by using a filling assembly positioned between the battery components and the battery housing, and ensuring good heat exchange, the heat generated by the battery components during charging and discharging can be absorbed, transferred, and diffused in a timely manner, achieving comprehensive and precise heat control throughout the battery pack.

[0007] Furthermore, the battery housing includes a detachable upper cover and a lower cover. The upper cover is sealed at the top opening of the lower cover, forming a sealed cavity with an internal storage cavity.

[0008] Furthermore, the battery housing also includes at least one handle connected to the upper cover and / or lower cover, the handle being rotatably disposed on the top surface of the upper cover and located at the geometric center of the top surface of the upper cover.

[0009] Furthermore, the filling particles are composed of irregular foam particles.

[0010] Furthermore, the filling particles are a mixture of spherical foam particles and triangular pyramidal foam particles.

[0011] Furthermore, the spherical foam particles and the triangular pyramidal foam particles are mixed in a ratio of 6:4.

[0012] Furthermore, the filler particles are made by mixing ethylene-vinyl acetate copolymer (EVA) and polyurethane pearl cotton; wherein the ratio of ethylene-vinyl acetate copolymer (EVA) to polyurethane pearl cotton is 70:30.

[0013] Furthermore, the battery housing also includes a middle frame disposed between the upper cover and the lower cover. The middle frame is sleeved around the outer periphery of the battery assembly, fixed integrally with the battery assembly, and is configured to move together.

[0014] Furthermore, a filling component is provided in the gap between the middle frame and the lower cover.

[0015] A battery pack according to a second aspect of the present invention includes the above-described filling structure.

[0016] The battery pack filling structure provided in the above embodiments forms a sealed cavity with an internal storage cavity by being enclosed by a detachable upper and lower cover, providing a stable and reliable fixed space for storing battery components. By using irregular foam particles, the staggered layers of the space formed by geometric interlocking can be further increased, significantly increasing the contact area with the filler adhesive, thereby increasing the heat transfer area between the filler adhesive and the filler particles. This increases the filling density between the filler particles and the filler adhesive while significantly reducing or eliminating unfilled areas, thus avoiding the risk of local overheating. The handle connected to the upper and / or lower cover allows for extremely convenient assembly and disassembly of the battery pack. By adding a middle frame that loops around the outer periphery of the battery components, the battery components can be pre-assembled, greatly improving the efficiency of assembly and disassembly. The filling component, which is located between the battery components and the battery housing and has good heat exchange with both, can absorb, transfer, and diffuse the heat generated by the battery components during charging and discharging in a timely manner, achieving comprehensive and precise control of the heat within the entire battery pack. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the battery pack filling structure shown in the embodiment;

[0018] Figure 2 This is another schematic diagram of the battery pack filling structure shown in the embodiment;

[0019] Figure 3 This is another schematic diagram of the battery pack filling structure shown in the embodiment. Detailed Implementation

[0020] 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.

[0021] It should be noted that if any directional indication, such as up, down, left, right, front, back, etc., is involved in the embodiments of this utility model, such directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. Furthermore, if any description involving "first," "second," "S1," "S2," "step one," "step two," etc., is involved in the embodiments of this utility model, such description is only for descriptive purposes and should not be construed as indicating or implying their relative importance, or implicitly indicating the number of technical features indicated or the execution order of the method. Those skilled in the art will understand that anything that does not violate the essential points of the utility model within the scope of its inventive concept should be included within the protection scope of this utility model.

[0022] like Figure 1 As shown in the illustration, a battery pack filling structure according to a partially exemplary embodiment includes a battery housing 10, a battery assembly 20, and a filling assembly 30. The battery housing 10 is formed by connecting a panel and supporting ribs, creating a sealed cavity with internal storage space. The battery assembly 20 is embedded and fixed within the internal cavity of the battery housing 10. The filling assembly 30 is fixed inside the battery housing 10, positioned between the battery housing 10 and the battery assembly 20, and is configured to maintain good heat exchange with both the battery assembly 20 and the battery housing 10. Thus, by using a filling assembly positioned between the battery assembly and the battery housing, and maintaining good heat exchange with both, the heat generated by the battery assembly during charging and discharging can be absorbed, transferred, and diffused in a timely manner, achieving comprehensive and precise control of the heat within the entire battery pack.

[0023] Preferably, let Figure 1As shown, the battery housing 10 includes a detachable upper cover 11 and a lower cover 12. The upper cover 11 is sealed at the top opening of the lower cover 12, forming a sealed cavity with an internal storage cavity.

[0024] To facilitate the assembly and disassembly of the battery pack, the battery housing 10 also includes at least one handle 13 connected to the upper cover 11 and / or the lower cover 12, the handle 13 being configured to extend upward in the vertical direction.

[0025] In summary, the battery housing provided in this application forms a sealed cavity with an internal storage cavity by being enclosed by a detachable upper cover and a lower cover, providing a stable and reliable fixed space for storing battery components; and the assembly and disassembly of the battery pack can be achieved extremely conveniently through the handles connected to the upper cover and / or the lower cover.

[0026] Optionally, such as Figure 2 As shown, there is one handle 13, which is rotatably mounted on the top surface of the upper cover 11. Specifically, the handle 13 is located at the geometric center of the top surface of the upper cover 11.

[0027] Optionally, such as Figure 2 and Figure 3 As shown, the filling component 30 includes filler particles 31 and filler adhesive 32. The filler particles 31 are staggered between the battery component 20 and the battery housing 10, forming a connected topological space to accommodate the filler adhesive 32 through a geometric interlocking effect. The filler adhesive 32 is designed to freely permeate and fill the connected topological space formed by the filler particles 31, and can be cured after completion. Thus, the connected topological space formed by the geometric interlocking effect between the filler particles creates a staggered, interconnected, and spatially stable geometric cavity. The filler adhesive freely permeates and fills the geometric cavity formed by the filler particles, and after completion, it cures, achieving sufficient contact with the filler particles, thereby forming a stable whole.

[0028] Preferably, the filler particles 31 are composed of irregular foam particles; specifically, the filler particles 31 are a mixture of spherical foam particles and triangular pyramidal foam particles. Further, the spherical foam particles and triangular pyramidal foam particles are mixed in a 6:4 ratio. Thus, by using irregular foam particles, the staggered layers of the geometrically interlocked space can be further increased, significantly increasing the contact area with the filler adhesive, thereby increasing the heat transfer area between the filler adhesive and the filler particles. This increases the filling density between the filler particles and the filler adhesive while significantly reducing or eliminating unfilled areas, thus avoiding the risk of localized overheating.

[0029] Specifically, in the preferred embodiment of this application, a mixture of spherical and triangular pyramidal filling particles is used, which can more tightly fill complex gaps and increase the density to ≥90% compared to traditional square or block-shaped foam.

[0030] Optionally, the filler particles 31 are made of polyurethane pearl cotton, thereby giving the filler particles both high flame retardancy (UL94 V-0) and significantly reducing manufacturing costs. Preferably, the filler particles 31 are made of a mixture of ethylene-vinyl acetate copolymer (EVA) and polyurethane pearl cotton. Specifically, the ratio of ethylene-vinyl acetate copolymer (EVA) to polyurethane pearl cotton in the filler particles 31 is 70%:30%.

[0031] Preferably, the filler adhesive 32 is a low-viscosity, high-thermal-conductivity room-temperature curing adhesive, thereby ensuring that the filler adhesive can naturally penetrate the gaps between the filling particles. Specifically, the filler adhesive 32 is a low-viscosity (2000-5000cps), high-thermal-conductivity (≥0.8W / m·K) room-temperature curing adhesive.

[0032] Optionally, such as Figure 3 As shown, in another specific embodiment, to improve the convenience of fixing and operating the battery assembly 20, the inventors further improved the structure of the battery housing 10. Specifically, a middle frame 14 is added between the upper cover 11 and the lower cover 12. The middle frame 14 is fitted around the outer periphery of the battery assembly 20, fixed integrally with the battery assembly 20, and moved together with it. Therefore, by adding the middle frame fitted around the outer periphery of the battery assembly, the battery assembly can be pre-assembled, greatly improving the efficiency of assembly and disassembly. Preferably, the gap between the middle frame 14 and the lower cover 12 is filled with a filling component 30, thereby ensuring the continuity of the heat transfer path between the battery assembly and the battery housing.

[0033] Optionally, to enhance the overall strength of the battery box, there are two handles 13, which are detachably fixed to both sides of the short side of the middle frame 14.

[0034] Furthermore, regarding the composition of the battery assembly, it can be a single battery cell formed by connecting one or more individual lithium batteries, or an integral structure formed by multiple individual lithium batteries. Specific details regarding the structure of the battery assembly, its spatial arrangement, or other structural shapes that achieve equivalent functions should be readily conceived by those skilled in the art, and therefore will not be elaborated upon here.

[0035] In addition, it includes other auxiliary equipment such as those connecting the battery pack and its control system. For example, control switches, connection interfaces, etc., which should be easily conceived by those skilled in the art, and therefore will not be described in detail here.

[0036] In summary, the battery pack filling structure provided in this application forms a sealed cavity with an internal storage cavity through a detachable upper and lower cover, providing a stable and reliable fixed space for storing battery components. By using irregular foam particles, the staggered layers of the space formed by geometric interlocking can be further increased, significantly increasing the contact area with the filler adhesive, thereby increasing the heat transfer area between the filler adhesive and the filler particles. This increases the filling density between the filler particles and the filler adhesive while significantly reducing or eliminating unfilled areas, thus avoiding the risk of local overheating. The handle connected to the upper and / or lower cover allows for extremely convenient assembly and disassembly of the battery pack. The addition of a middle frame that loops around the outer periphery of the battery components allows for pre-assembly of the battery components, greatly improving the efficiency of assembly and disassembly. The filling component, located between the battery components and the battery housing and having good heat exchange with both, can absorb, transfer, and diffuse the heat generated by the battery components during charging and discharging in a timely manner, achieving comprehensive and precise control of the heat within the entire battery pack.

[0037] The above description is only a specific embodiment of the present utility model. The technical features of the above embodiments can be combined arbitrarily. In order to simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery pack filling structure, characterized in that, It includes a battery housing (10), a battery assembly (20) and a filling assembly (30), wherein the battery housing (10) is formed by connecting a panel and a support rib, and has a sealed cavity for housing the battery assembly (20); A filling component (30) is provided between the battery housing (10) and the battery assembly (20). The filling component (30) includes filling particles (31) and filling adhesive (32). The filling particles (31) are scattered in the gaps between the battery assembly (20) and the battery housing (10). The filling adhesive (32) is designed to solidify after filling the area around the filling particles (31).

2. The filling structure according to claim 1, characterized in that, The battery box (10) includes a detachable upper cover (11) and a lower cover (12). The upper cover (11) is sealed at the top opening of the lower cover (12) and together with the lower cover (12) forms a sealed cavity with an internal storage cavity.

3. The filling structure according to claim 2, characterized in that, The battery housing (10) also includes at least one handle (13) connected to the upper cover (11) and / or the lower cover (12), the handle being rotatably disposed on the top surface of the upper cover (11) and located at the geometric center of the top surface of the upper cover (11).

4. The filling structure according to claim 1, characterized in that, The filling particles (31) are composed of irregular foam particles.

5. The filling structure according to claim 4, characterized in that, The filling particles (31) are made by mixing spherical foam particles and triangular pyramidal foam particles.

6. The filling structure according to claim 5, characterized in that, The spherical foam particles and the triangular pyramidal foam particles are mixed in a ratio of 6:

4.

7. The filling structure according to claim 1, characterized in that, The filling particles (31) are made by mixing ethylene-vinyl acetate copolymer and polyurethane pearl cotton; wherein the ratio of ethylene-vinyl acetate copolymer to polyurethane pearl cotton is 70:

30.

8. The filling structure according to claim 1, characterized in that, The battery housing (10) also includes a middle frame (14) disposed between the upper cover (11) and the lower cover (12), the middle frame (14) being sleeved around the outer periphery of the battery assembly (20) and fixed together with the battery assembly (20).

9. The filling structure according to claim 8, characterized in that, A filling component (30) is provided in the gap between the middle frame (14) and the lower cover (12).

10. A battery pack, characterized in that, The filling structure described in any one of claims 1 to 9 is adopted.

Images