Battery pack sealing waterproof structure

Abstract

In order to improve the sealing level of the battery pack, IP67 level protection is realized in the case of extremely small size, the utility model provides a kind of battery pack sealing waterproof structure, comprising: battery pack, including electric core and wire, the wire is connected with the electric core;First sealing element, the first sealing element is covered the periphery of the electric core;Protective shell, the protective shell includes first shell and second shell, the first shell and second shell are respectively set in the both ends of the electric core;The wire one end passes out the first sealing element, and from the inner wall of the first shell and the outer wall of the first sealing element between extension to the outside of the first sealing element;Second sealing element, the outer wall of the first sealing element, the wire and the inner wall of the first shell between filling have the second sealing element, the outer wall of the first sealing element and the inner wall of the second shell between filling have the second sealing element.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a sealed and waterproof structure for battery packs. Background Technology

[0002] Nickel-metal hydride (NiMH) battery packs are widely used in outdoor energy storage and backup power applications due to their high safety, wide environmental adaptability, and long cycle life, making them an ideal choice for extreme environments (high cold, high temperature, high humidity) and scenarios with high safety requirements. The IP67 standard refers to the battery's ability to completely prevent the intrusion of foreign objects and dust, and to withstand immersion in water up to 1 meter deep for 30 minutes without harmful effects. Outdoor NiMH battery packs for energy storage and backup power typically achieve the IP67 protection standard by using a multi-level sealing ring stacking method combined with sealant filling. However, traditional processes suffer from larger dimensions and more complex sealing layers, significantly increasing the overall weight and volume of the battery pack, which is incompatible with the current demands for portable devices and efficient space utilization.

[0003] Therefore, there is an urgent need for a battery pack sealing and waterproofing structure with an extremely small external size and an IP67 rating. Utility Model Content

[0004] The purpose of this invention is to provide a sealed and waterproof battery pack structure to solve the problem of the large size of the existing IP67-rated sealed and waterproof battery pack structures.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] This utility model provides a sealed and waterproof battery pack structure, including:

[0007] A battery pack, comprising battery cells and wires, wherein the wires are connected to the battery cells;

[0008] A first sealing element, the first sealing element covering the outer periphery of the battery cell;

[0009] A protective shell, comprising a first shell and a second shell, wherein the first shell and the second shell are respectively fitted onto both ends of the battery cell;

[0010] One end of the wire passes through the first seal and extends from between the inner wall of the first housing and the outer wall of the first seal to the outer side of the first seal.

[0011] The second seal is filled between the outer wall of the first seal, the wire and the inner wall of the first housing, and between the outer wall of the first seal and the inner wall of the second housing.

[0012] Optionally, the first sealing element includes a first sealing sleeve and a second sealing sleeve. The first sealing sleeve is fitted around the outer periphery of the battery pack, and the second sealing sleeve is fitted around the outer periphery of the first sealing sleeve and fits snugly against the first sealing sleeve. This can prevent subsequent sealant from penetrating into the battery cell and improve the overall safety performance of the battery pack.

[0013] The first sealing sleeve is provided with a first opening, the first opening is located on at least one side of the battery pack, and one end of the wire extends out of the first sealing sleeve from the first opening;

[0014] The second sealing sleeve has a second opening located at at least one end of the battery pack, and the wire extends out of the second sealing sleeve from the second opening. The first and second openings are used for the wire to pass through, improving the waterproof sealing effect at the wire.

[0015] Optionally, the edge of the first opening is flush with the side of the battery pack, and the edge of the second opening is flush with the end of the first sealing sleeve. This ensures that the wires extend smoothly out of the first seal and prevents abnormal wiring connections caused by long-term twisting and bending of the wires.

[0016] Optionally, the second sealant is a sealant or a sealing strip.

[0017] Optionally, the battery cell has a first end and a second end, and the conductor is bent from the first end to the second end. The bent conductor is close to one side of the first seal, which avoids drilling holes in the first housing to lead out the conductor and reduces the complexity of sealing.

[0018] Optionally, the first housing is provided with a receiving groove for accommodating the wire, and the receiving groove provides space for bending the wire.

[0019] Optionally, the thickness H1 of the first seal is 0.2~0.4 mm.

[0020] Optionally, the thickness H2 of the first shell is 0.5~2.1mm, and the thickness H3 of the second shell is 0.5~2.1mm.

[0021] Optionally, the thickness H4 of the second seal is 0.3~2.0 mm.

[0022] Optionally, the width W1 of the first housing covering the first seal is 5~25mm, and the width W2 of the second housing covering the first seal is 5~25mm. The widths of the first and second housings covering the first seal within the above ranges ensure sealing effectiveness at all openings of the first seal and minimize the material and weight of the seal.

[0023] In the battery pack sealing and waterproof structure provided by this utility model, the outer periphery of the battery cell is fully wrapped by fitting a first shell and a second shell at both ends of the first sealing member, and the gaps between the components are filled and sealed by the second sealing member, achieving an IP67 protection level. By using the first sealing member to cover the battery cell, subsequent sealant penetration into the battery cell can be prevented, improving the overall safety performance of the battery pack. The battery cell's wires are placed between the outer wall of the first shell and the first sealing member, ensuring the sealing effect at the wires and reducing the structural complexity of the first shell, thus reducing production costs. The battery pack sealing and waterproof structure provided by this utility model is compact in size, uses less material, has low cost, and a high safety factor, achieving an IP67 protection level. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 these drawings without creative effort.

[0025] Figure 1 This is a top view schematic diagram of the battery pack sealing and waterproof structure in one embodiment of this utility model;

[0026] Figure 2 This is a front cross-sectional view of the battery pack sealing and waterproof structure in one embodiment of this utility model;

[0027] Figure 3 This is a partial front cross-sectional view (first shell part) of the battery pack sealing and waterproof structure in one embodiment of the present invention.

[0028] Figure 4 This is a partial front cross-sectional view of the battery pack sealing and waterproof structure (second shell part) in one embodiment of the present invention.

[0029] Figure 5 This is a side view cross-sectional structural diagram of the first shell in the battery pack sealing and waterproof structure of one embodiment of the present invention.

[0030] Explanation of key component symbols:

[0031] 1. Wire; 2. First seal; 21. First sealing sleeve; 22. Second sealing sleeve; 3. Second seal; 4. First housing; 5. Second housing; 6. Receiving groove; 100. Battery cell. Detailed Implementation

[0032] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] The present invention will be further described below through embodiments.

[0034] like Figure 1 As shown, one embodiment of this utility model provides a battery pack sealing and waterproof structure, including:

[0035] A battery pack includes a battery cell 100 and a wire 1, wherein the wire 1 is connected to the battery cell 100;

[0036] The first sealing element 2 covers the outer periphery of the battery cell 100;

[0037] The protective shell includes a first shell 4 and a second shell 5, which are respectively sleeved on both ends of the battery cell 100;

[0038] One end of the wire 1 passes through the first seal 2 and extends from between the inner wall of the first housing 4 and the outer wall of the first seal 2 to the outer side of the first seal 2.

[0039] The second sealing element 3 is filled between the outer wall of the first sealing element 2, the wire 1 and the inner wall of the first housing 4, and between the outer wall of the first sealing element 2 and the inner wall of the second housing 5.

[0040] Specifically, by fitting a first housing 4 and a second housing 5 around both ends of the first sealing member 2, the battery cell 100 is fully enclosed. The second sealing member 3 fills and seals the gaps between components, achieving an IP67 protection level. By using the first sealing member 2 to enclose the battery cell 100, subsequent sealant penetration into the battery cell 100 is prevented, improving the overall safety performance of the battery pack. Placing the lead wire 1 of the battery cell 100 between the outer walls of the first housing and the first sealing member 2 ensures a good seal at the lead wire 1 and reduces the structural complexity of the first housing 4, thus lowering production costs. The material of the first sealing member 2 is selected from one or more of PVC, PET, and PE. The first sealing member 2 is manufactured using vacuum forming, blow molding, or injection molding processes. The material of the protective shell is selected from one or more of PP and PC.

[0041] In some embodiments, the first sealing element 2 includes a first sealing sleeve 21 and a second sealing sleeve 22. The first sealing sleeve 21 is sleeved on the outer periphery of the battery pack, and the second sealing sleeve 22 is sleeved on the outer periphery of the first sealing sleeve 21 and fits against the first sealing sleeve 21. This can prevent subsequent sealant from penetrating into the cell 100 and improve the overall safety performance of the battery pack.

[0042] The first sealing sleeve 21 is provided with a first opening, the first opening is located on at least one side of the battery pack, and one end of the wire 1 extends out of the first sealing sleeve 21 from the first opening;

[0043] The second sealing sleeve 22 is provided with a second opening, which is located at at least one end of the battery pack. The wire 1 extends out of the second sealing sleeve 22 from the second opening. The first opening and the second opening are used for the wire 1 to pass through, thereby improving the waterproof sealing effect at the wire 1.

[0044] In some embodiments, the edge of the first opening is flush with the side of the battery pack, and the edge of the second opening is flush with the end of the first sealing sleeve 21, so as to achieve the smallest possible size of the sealed battery pack.

[0045] In some embodiments, the second seal 3 is a sealant or a sealing strip.

[0046] In some embodiments, the battery cell 100 has a first end and a second end, and the wire 1 is bent from the first end to the second end. The bent wire 1 is close to one side of the first seal 2, which can avoid drilling holes in the first housing 4 to lead out the wire 1 and reduce the complexity of sealing.

[0047] In some embodiments, the first housing 4 is provided with a receiving groove 6 for accommodating the wire 1, and the receiving groove 6 provides space for the wire 1 to be bent.

[0048] In some embodiments, the thickness H1 of the first seal 2 is 0.2~0.4 mm.

[0049] Specifically, the thickness H1 of the first seal 2 can be any value among 0.2mm, 0.26mm, 0.33mm, 0.38mm or 0.4mm.

[0050] In some embodiments, the thickness H2 of the first housing 4 is 0.5~2.1mm, and the thickness H3 of the second housing 5 is 0.5~2.1mm.

[0051] Specifically, the thickness H2 of the first shell 4 can be any value among 0.5mm, 1mm, or 2.1mm, and the thickness H3 of the second shell 5 can be any value among 0.5mm, 1mm, or 2.1mm.

[0052] In some embodiments, the thickness H4 of the second seal 3 is 0.3~2.0 mm.

[0053] Specifically, the thickness H4 of the second seal 3 can be any value among 0.3mm, 0.7mm, 0.9mm, 1.3mm, 1.5mm, 1.8mm or 2.0mm.

[0054] In some embodiments, the width W1 of the first housing 4 covering the first seal 2 is 5~25mm, and the width W2 of the second housing 5 covering the first seal 2 is 5~25mm.

[0055] Specifically, the width W1 of the first housing 4 covering the first seal 2 can be any value among 5mm, 8mm, 11mm, 15mm, 18mm, 20mm, 21mm, 24mm, or 25mm, and the width W2 of the second housing 5 covering the first seal 2 can be any value among 5mm, 8mm, 11mm, 15mm, 18mm, 20mm, 21mm, 24mm, or 25mm. The widths of the first housing 4 and the second housing 5 covering the first seal 2 within the above-mentioned ranges ensure the sealing effect at all opening positions of the first seal 2, and minimize the material and weight of the seal.

[0056] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A sealed and waterproof structure for a battery pack, characterized in that, include: The battery pack includes a battery cell (100) and a wire (1) connected to the battery cell (100); The first sealing element (2) covers the outer periphery of the battery cell (100); The protective shell includes a first shell (4) and a second shell (5), which are respectively sleeved on both ends of the battery cell (100); One end of the wire (1) passes through the first seal (2) and extends from the inner wall of the first housing (4) and the outer wall of the first seal (2) to the outer side of the first seal (2); The second seal (3) is filled between the outer wall of the first seal (2), the wire (1) and the inner wall of the first housing (4), and between the outer wall of the first seal (2) and the inner wall of the second housing (5).

2. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The first sealing element (2) includes a first sealing sleeve (21) and a second sealing sleeve (22). The first sealing sleeve (21) is fitted around the outer periphery of the battery pack, and the second sealing sleeve (22) is fitted around the outer periphery of the first sealing sleeve (21) and fits against the first sealing sleeve (21). The first sealing sleeve (21) is provided with a first opening, the first opening is located on at least one side of the battery pack, and one end of the wire (1) extends out of the first sealing sleeve (21) from the first opening. The second sealing sleeve (22) is provided with a second opening located at at least one end of the battery pack, and the wire (1) extends out of the second sealing sleeve (22) from the second opening.

3. The battery pack sealing and waterproof structure according to claim 2, characterized in that, The edge of the first opening is flush with the side of the battery pack, and the edge of the second opening is flush with the end of the first sealing sleeve (21).

4. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The second sealing element (3) is a sealant or a sealing strip.

5. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The battery cell (100) has a first end and a second end, and the conductor (1) is bent from the first end toward the second end.

6. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The first housing (4) is provided with a receiving groove (6) for accommodating the wire (1).

7. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The thickness H1 of the first sealing element (2) is 0.2~0.4mm.

8. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The thickness H2 of the first shell (4) is 0.5~2.1mm, and the thickness H3 of the second shell (5) is 0.5~2.1mm.

9. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The thickness H4 of the second seal (3) is 0.3~2.0mm.

10. The battery pack sealing and waterproof structure according to claim 1, characterized in that, The width W1 of the first housing (4) covering the first seal (2) is 5~25mm, and the width W2 of the second housing (5) covering the first seal (2) is 5~25mm.

Images