Battery pack box body, battery pack and electric equipment

Abstract

The utility model relates to a battery pack box body, a battery pack and electric equipment, the battery pack box body comprises a tray, a cover plate, a first sealing structure and a second sealing structure, the cover plate can be arranged on the tray, an accommodating space for accommodating a battery is defined by the cover plate and the tray, and the first sealing structure and the second sealing structure are both located between the tray and the cover plate; the second sealing structure is located on the outer side of the first sealing structure, and the first sealing structure and the second sealing structure are made of different materials. On one hand, when one sealing structural member fails, the other sealing structural member can still ensure the sealing of the whole battery pack, so that the sealing performance between the tray and the cover plate can be improved; and on the other hand, as the first sealing structure and the second sealing structure are respectively made of different materials, the first sealing structure and the second sealing structure can perform performance complementation to a certain extent when playing a sealing role, so that the battery pack can cope with more working condition environments, and the stability and the error-tolerant rate of the battery pack are further improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and in particular to a battery pack case, a battery pack, and an electrical device. Background Art

[0002] Currently, traditional battery packs all use a single-layer sealing structure for sealing. However, due to the limitations of the sealing structure itself, a single-layer sealing structure can often only meet the sealing requirements of certain specific working conditions (such as low temperature or torsional working conditions). This leads to a greater risk of sealing failure in the battery pack structure. Therefore, there is an urgent need to provide a battery pack box with better sealing performance. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery pack case, a battery pack, and an electrical device to solve the technical problems existing in the related art.

[0004] In order to achieve the above objectives, the first aspect of the present disclosure provides a battery pack case, comprising:

[0005] tray,

[0006] a cover plate, the cover plate being capable of being disposed on the tray and enclosing together with the tray a receiving space for receiving batteries;

[0007] a first sealing structure, located between the tray and the cover;

[0008] a second sealing structure, located between the tray and the cover plate, the second sealing structure being located outside the first sealing structure;

[0009] Wherein, the first sealing structure and the second sealing structure are made of different materials.

[0010] Optionally, the battery pack case further includes a first fastener, which is used to fasten the tray and the cover, the first sealing structure is arranged on the inner side of the first fastener, and at least part of the second sealing structure is located on the inner side of the first fastener.

[0011] Optionally, the battery pack case further includes a first fastener;

[0012] Along the circumference of the cover plate, a first through hole is formed on the edge of the cover plate and penetrates along the thickness direction of the cover plate;

[0013] Along the circumference of the tray, a second through hole is formed on the edge of the tray and penetrates along the thickness direction of the tray;

[0014] Along the extension direction of the second sealing structure, a third through hole is formed on the second sealing structure and penetrates along the thickness direction of the second sealing structure;

[0015] The first through hole, the second through hole and the third through hole are arranged opposite to each other, and the first fastener is locked in the first through hole, the second through hole and the third through hole.

[0016] Optionally, the battery pack box further includes a plurality of second fasteners, and the second fasteners are used to connect to the vehicle frame;

[0017] Along the circumference of the cover plate, a first through hole is formed on the edge of the cover plate and penetrates along the thickness direction of the cover plate;

[0018] Along the circumference of the tray, a second through hole is formed on the edge of the tray and penetrates along the thickness direction of the tray;

[0019] Along the extension direction of the second sealing structure, a relief portion is formed on the second sealing structure and penetrates along the thickness direction of the second sealing structure;

[0020] The first through hole, the second through hole, and the avoidance portion are arranged opposite to each other, and the second fastener is locked in the first through hole, the second through hole, and the avoidance portion.

[0021] Optionally, the avoidance portion is formed as a notch groove, and an opening of the notch groove is formed on a side of the second sealing structure facing away from the first sealing structure.

[0022] Optionally, the first sealing structure is bonded to the pallet on a side close to the pallet, and / or the first sealing structure is bonded to the cover plate on a side facing away from the pallet; the second sealing structure is bonded to the pallet on a side close to the pallet, and / or the second sealing structure is bonded to the cover plate on a side facing away from the pallet.

[0023] Optionally, the tray includes a tray body and a first flange, wherein the first flange is formed on an upper edge of the tray body and folded outwards;

[0024] The cover includes a cover body and a second flange, the second flange is formed at the lower edge of the cover body and is folded outward, and the second flange is arranged opposite to the first flange; the first sealing structure and the second sealing structure are arranged between the first flange and the second flange, and the first sealing structure is arranged at the edge of the first flange close to the side of the tray body.

[0025] Optionally, the first sealing structure is a sealing strip or sealant; or,

[0026] The second sealing structure is a sealing strip or sealant.

[0027] Optionally, the first sealing structure is made of one of polyurethane sealant, foamed silicone, and EPDM rubber, and the second sealing structure is made of one of polyurethane sealant, foamed silicone, and EPDM rubber.

[0028] A second aspect of the present disclosure provides a battery pack, comprising a distribution box, a battery assembly, and the battery pack case as described above.

[0029] A third aspect of the present disclosure provides an electrical device comprising the battery pack case or the battery pack as described above.

[0030] Through the above technical solution, on the one hand, by setting the first sealing structure and the second sealing structure, two sealing lines of defense can be formed between the tray and the cover plate. When one sealing structure fails, the other sealing structure can still ensure the sealing of the entire battery pack, thereby improving the sealing performance between the tray and the cover plate; on the other hand, since the first sealing structure and the second sealing structure are made of different materials respectively, different materials have different properties, the first sealing structure and the second sealing structure can complement each other to a certain extent when performing the sealing function, thereby being able to cope with more working conditions and further improve the stability and fault tolerance of the battery pack.

[0031] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0033] Figure 1 is a perspective view of a battery pack provided by an exemplary embodiment of the present disclosure;

[0034] Figure 2 yes Figure 1 An enlarged view of part A;

[0035] Figure 3 is a top view of the tray body of a battery pack box provided by an exemplary embodiment of the present disclosure, in cooperation with the first sealing structure and the second sealing structure;

[0036] Figure 4 yes Figure 3 Magnified view of part B.

[0037] Description of Reference Numerals

[0038] 1-battery pack box; 10-tray; 11-tray body; 12-first flange; 121-second through hole; 122-second through hole; 20-cover; 21-cover body; 22-second flange; 221-first through hole; 222-first through hole; 30-first sealing structure; 40-second sealing structure; 41-third through hole; 42-notch; 50-battery assembly; 60-first fastener; 100-battery pack. DETAILED DESCRIPTION

[0039] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0040] In the present disclosure, unless otherwise specified, the directions or positional relationships indicated by directional words such as "up", "down", "left", and "right" are only used to facilitate the description of the present disclosure and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, and a specific directional structure and operation. Therefore, they cannot be understood as limitations on the present disclosure. The terms "inside" and "outside" refer to the inside and outside of the battery pack case. Specifically, the side close to the storage space for accommodating the battery is the inside, and the side away from the storage space for accommodating the battery is the outside.

[0041] In addition, it should be noted that the terms used, such as "first" and "second", are used to distinguish one element from another and do not have order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings represent the same elements.

[0042] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; and they may refer to direct connections or indirect connections via an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0043] refer to Figures 1 to 4 As shown, the first aspect of the present disclosure provides a battery pack case 1, including a tray 10, a cover plate 20, a first sealing structure 30 and a second sealing structure 40. The cover plate 20 can be set on the tray 10 and form a accommodating space for accommodating batteries with the tray 10. The first sealing structure 30 and the second sealing structure 40 are both located between the tray 10 and the cover plate 20. The second sealing structure 40 is located on the outside of the first sealing structure 30. The first sealing structure 30 and the second sealing structure 40 are made of different materials.

[0044] Through the above technical solution, on the one hand, by setting the first sealing structure 30 and the second sealing structure 40, two sealing lines of defense can be formed between the tray 10 and the cover plate 20. When one sealing structure fails, the other sealing structure can still ensure the sealing of the entire battery pack 100, thereby improving the sealing performance between the tray 10 and the cover plate 20; on the other hand, since the first sealing structure 30 and the second sealing structure 40 are made of different materials respectively, different materials have different properties, so that the first sealing structure 30 and the second sealing structure 40 can complement each other's performance to a certain extent when performing the sealing function, thereby being able to cope with more working conditions and further improving the stability and fault tolerance of the battery pack 100.

[0045] For example, sealants can be easily damaged under torsion at low temperatures, leading to seal failure. Long-term compression or water impact on sealing strips can damage the strip structure, leading to seal failure.

[0046] Based on this, in an exemplary embodiment provided by the present disclosure, the first sealing structure 30 can be a sealing adhesive strip or sealant; alternatively, the second sealing structure 40 can be a sealing adhesive strip or sealant. In other words, one of the first sealing structure 30 and the second sealing structure 40 can be a sealant, while the other of the first sealing structure 30 and the second sealing structure 40 can be a sealing adhesive strip. When the first sealing structure 30 and the second sealing structure 40 are used to seal the cover plate 20 and the tray 10, the performance of the two can complement each other. In this way, the sealing requirements under torsion conditions at low temperatures can be met, and the use requirements under long-term compression conditions or long-term water impact can be met. Even if one of the first sealing structure 30 and the second sealing structure 40 fails in sealing, the other can still perform its sealing function independently, thereby improving the stability of the battery pack 100 and reducing the probability of sealing failure of the battery pack 100.

[0047] In an exemplary embodiment provided herein, the first sealing structure 30 can be made of one of polyurethane sealant, foamed silicone, and EPDM rubber, and the second sealing structure 40 can be made of one of polyurethane sealant, foamed silicone, and EPDM rubber. Since the first sealing structure 30 and the second sealing structure 40 are made of different materials, in the embodiment where the first sealing structure 30 is made of polyurethane sealant, the second sealing structure 40 can only be made of a material different from the polyurethane sealant.

[0048] It should be noted that the present disclosure does not limit the specific materials of the first sealing structure 30 and the second sealing structure 40 , and they may be any material that can meet the sealing requirements of the battery pack 100 .

[0049] Alternatively, as Figure 4 As shown, the battery pack case 1 further includes a first fastener 60, which is used to fasten and connect the tray 10 and the cover plate 20. The first sealing structure 30 is disposed on the inner side of the first fastener 60, and at least a portion of the second sealing structure 40 is located on the inner side of the first fastener 60. Since the first sealing structure 30 and the second sealing structure 40 are disposed between the tray 10 and the cover plate 20, when the first fastener 60 fastens the tray 10 and the cover plate 20, the tray 10 and the cover plate 20 can be pressed against the outer surface of the first sealing structure 30 and the outer surface of the second sealing structure 40 from both sides of the first sealing structure 30 and the second sealing structure 40, so that the first sealing structure 30 and the second sealing structure 40 can be in close contact with the tray 10 and the cover plate 20, thereby improving the sealing effect.

[0050] In addition, since the first sealing structure 30 is arranged on the inner side of the first fastener 60, and at least part of the second sealing structure 40 is located on the inner side of the first fastener 60, it can be understood that the above-mentioned sealing structure is provided on both sides of the first sealing structure 30, that is, the first sealing structure 30 and the second sealing structure 40 can achieve sealing on both sides of the first fastener 60, avoiding or reducing the problem of sealing failure due to the setting of the first fastener 60.

[0051] The present disclosure does not limit the fastening method of the fastener between the cover plate 20 and the tray 10, and can be any structure that can lock the cover plate 20 and the tray 10, specifically, Figures 1 to 2 As shown, in an exemplary embodiment provided by the present disclosure, a first through-hole 221 is formed along the circumference of the cover plate 20 and extends through the cover plate 20 along its thickness direction. A second through-hole 121 is formed along the circumference of the tray 10 and extends through the tray 10 along its thickness direction. A third through-hole 41 is formed along the extension direction of the second sealing structure 40 and extends through the second sealing structure 40 along its thickness direction. The first through-hole 221, the second through-hole 121, and the third through-hole 41 are arranged opposite each other, and the first fastener 60 is locked in the first through-hole 221, the second through-hole 121, and the third through-hole 41. Due to the third through-hole 41 formed in the second sealing structure 40, during the process of locking the tray 10 and the cover plate 20, the first fastener 60 can sequentially pass through the first through-hole 221, the third through-hole 41, and the second through-hole 121 to lock the second sealing structure 40 between the cover plate 20 and the tray 10, and simultaneously fix the second sealing structure 40.

[0052] Furthermore, precisely because the third through hole 41 is provided on the second sealing structure 40 , the first fastener 60 passing through the third through hole 41 can also position the second sealing structure 40 , thereby preventing the second sealing structure 40 from moving between the cover plate 20 and the tray 10 .

[0053] In addition, if Figures 1 to 4 As shown, the battery pack case 1 may also include a plurality of second fasteners (not shown), which are used to connect to the vehicle frame. A first through-hole 222 is formed on the edge of the cover plate 20 along its circumference, extending through the cover plate 20 in the direction of its thickness. A second through-hole 122 is formed on the edge of the tray 10 along its circumference, extending through the cover plate 20 in the direction of its thickness. A relief portion is formed on the second sealing structure 40 along its extension direction, extending through the cover plate 20 in the direction of its thickness. The first through-hole 222, the second through-hole 122, and the relief portion are arranged relative to each other, and the second fastener is locked within the first through-hole 222, the second through-hole 122, and the relief portion. During the process of fastening the above structure to the vehicle frame using the second fastener, the relief hole formed on the second sealing structure 40 can prevent the second fastener from contacting the second sealing structure 40, thereby preventing interference with the second sealing structure 40 during assembly.

[0054] It should be noted that the present disclosure does not impose any restrictions on the specific shape of the aforementioned relief portion, as long as it can prevent the second sealing structure 40 from contacting the second fastener. For example, the relief portion can be formed in the shape of a hole, or, in an exemplary embodiment provided by the present disclosure, the relief portion can be formed in the shape of a notch 42, with the opening of the notch 42 formed on the side of the second sealing structure 40 facing away from the first sealing structure 30. The relief portion formed in the shape of an open hole will not affect the contact between the tray 10 and the cover plate 20, while still being able to avoid the second fastener.

[0055] Optionally, the first sealing structure 30 is bonded to the tray 10 on a side close to the tray 10, and / or the first sealing structure 30 is bonded to the cover plate 20 on a side facing away from the tray 10; the second sealing structure 40 is bonded to the tray 10 on a side close to the tray 10, and / or the second sealing structure 40 is bonded to the cover plate 20 on a side facing away from the tray 10. That is, the first sealing structure 30 may be bonded to the cover plate 20 and the tray 10 on both sides, or the first sealing structure 30 may be bonded to the tray 10 on one side and not bonded to the cover plate 20 on the other side (e.g., directly abutting against the cover plate 20). Similarly, the second sealing structure 40 may be bonded to the cover plate 20 and the tray 10 on both sides, or the second sealing structure 40 may be bonded to the tray 10 on one side and not bonded to the cover plate 20 on the other side (e.g., directly abutting against the cover plate 20). For example, for the embodiment in which the side of the first sealing structure 30 close to the pallet 10 is bonded to the pallet 10, and the side of the second sealing structure 40 close to the pallet 10 is bonded to the pallet 10, in the process of sealing the pallet 10 and the cover plate 20, on the one hand, the gap between the side of the first sealing structure 30 and the second sealing structure 40 close to the pallet 10 and the pallet 10 can be reduced to ensure the close contact between the first sealing structure 30 and the second sealing structure 40 and the pallet 10, thereby improving the sealing effect between the first sealing structure 30 and the second sealing structure 40 and the pallet 10; on the other hand, it can also play a positioning role for the first sealing structure 30 and the second sealing structure 40 before the cover plate 20 is covered on the pallet 10, thereby avoiding the problem of the first sealing structure 30 and the second sealing structure 40 moving relative to the pallet 10 during the installation of the cover plate 20.

[0056] It should be noted that, for the embodiment in which the battery pack case 1 is installed using a flip-chip process, the first sealing structure 30 is bonded to the cover plate 20 on one side close to the cover plate 20, and the second sealing structure 40 is bonded to the cover plate 20 on one side close to the cover plate 20. The other side of the first sealing structure 30 and the other side of the second sealing structure 40 can be pressed against (or bonded to) the tray 10, thereby improving the stability and sealing performance of the first sealing structure 30 and the second sealing structure 40 during the assembly process.

[0057] In order to further improve the sealing effect of the battery pack box 1, as Figures 1 to 2As shown, the pallet 10 may include a pallet body 11 and a first flange 12. The first flange 12 is formed at the upper edge of the pallet body 11 and folds outward. The cover 20 includes the cover body 21 and a second flange 22. The second flange 22 is formed at the lower edge of the cover body 21 and folds outward. The second flange 22 is disposed opposite the first flange 12. The first sealing structure 30 and the second sealing structure 40 are disposed between the first flange 12 and the second flange 22, with the first sealing structure 30 being disposed at the edge of the first flange 12 on the side closest to the pallet body 11. Thus, during the installation of the cover 20 of the pallet 10, the first flange 12 and the second flange 22 provide a sealed space for the installation of the first sealing structure 30 and the second sealing structure 40, further facilitating the installation process.

[0058] Moreover, since the first sealing structure 30 is arranged at the edge of the first flange 12 close to the tray body 11, it can seal the contact area between the first flange 12 and the second flange 22 as much as possible, thereby reducing or avoiding air from entering the area between the first flange 12 and the side flange to oxidize the part, thereby improving the service life of the battery pack box 1.

[0059] For the embodiment in which the first through hole 221 and the first via hole 222 are formed on the cover plate 20, the above-mentioned first through hole 221 and the first via hole 222 can be formed on the first flange 12 of the cover plate 20. For the implementation method in which the second through hole 121 and the second via hole 122 are formed on the tray 10, the second through hole 121 and the second via hole 122 can be formed on the second flange 22 of the tray 10.

[0060] A second aspect of the present disclosure provides a battery pack 100, such as Figure 1 As shown, it includes a distribution box, a battery assembly 50 and the above battery pack box 1. The battery pack 100 has all the beneficial effects of the above battery pack box 1, which will not be described in this disclosure.

[0061] The third aspect of the present disclosure provides an electrical device, including the above-mentioned battery pack case 1 or the above-mentioned battery pack 100. The electrical device has all the beneficial effects of the above-mentioned battery pack case 1 and battery pack 100, which are not described in this disclosure.

[0062] It should be noted that the electrical equipment referred to above may be any equipment with electricity demand, such as vehicles, ships, aircraft or energy storage cabinets.

[0063] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0065] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery pack box, characterized in that: include: tray, A cover plate, which can be disposed on the tray and encloses a storage space with the tray for storing batteries; A first sealing structure, located between the tray and the cover plate; A second sealing structure, located between the tray and the cover plate, the second sealing structure being located outside the first sealing structure; Wherein, the first sealing structure and the second sealing structure are made of different materials.

2. The battery pack case according to claim 1, characterized in that: The battery pack case also includes a first fastener, which is used to fasten the tray and the cover plate, the first sealing structure is arranged on the inner side of the first fastener, and at least part of the second sealing structure is located on the inner side of the first fastener.

3. The battery pack case according to claim 2, characterized in that: Along the circumference of the cover plate, a first through hole is formed on the edge of the cover plate and penetrates along the thickness direction of the cover plate; Along the circumference of the tray, a second through hole is formed on the edge of the tray and penetrates along the thickness direction of the tray; Along the extension direction of the second sealing structure, a third through hole penetrating along the thickness direction of the second sealing structure is formed on the second sealing structure; The first through hole, the second through hole and the third through hole are arranged opposite to each other, and the first fastener is locked in the first through hole, the second through hole and the third through hole.

4. The battery pack case according to claim 1, characterized in that: The battery pack box further includes a plurality of second fasteners, and the second fasteners are used to connect to the vehicle frame; Along the circumference of the cover plate, a first through hole is formed on the edge of the cover plate and penetrates along the thickness direction of the cover plate; Along the circumference of the tray, a second through hole is formed on the edge of the tray and penetrates along the thickness direction of the tray; Along the extension direction of the second sealing structure, a relief portion penetrating along the thickness direction of the second sealing structure is formed on the second sealing structure; The first through hole, the second through hole and the avoidance portion are arranged opposite to each other, and the second fastener is locked in the first through hole, the second through hole and the avoidance portion.

5. The battery pack case according to claim 4, characterized in that: The avoidance portion is formed as a notch groove, and an opening of the notch groove is formed on a side of the second sealing structure away from the first sealing structure.

6. The battery pack case according to claim 1, characterized in that: The first sealing structure is bonded to the pallet at a side close to the pallet, and / or the first sealing structure is bonded to the cover plate at a side away from the pallet; the second sealing structure is bonded to the pallet at a side close to the pallet, and / or the second sealing structure is bonded to the cover plate at a side away from the pallet.

7. The battery pack case according to any one of claims 1 to 6, characterized in that: The tray comprises a tray body and a first flange, wherein the first flange is formed at the upper edge of the tray body and folded outwards; The cover includes a cover body and a second flange, wherein the second flange is formed at the lower edge of the cover body and folded outward, and the second flange is arranged opposite to the first flange; the first sealing structure and the second sealing structure are arranged between the first flange and the second flange, and the first sealing structure is arranged at the edge of the first flange close to the side of the tray body.

8. The battery pack case according to any one of claims 1 to 6, characterized in that: The first sealing structure is a sealing strip or a sealing adhesive; or, The second sealing structure is a sealing strip or a sealing adhesive.

9. The battery pack case according to any one of claims 1 to 6, characterized in that: The first sealing structure is made of one of polyurethane sealant, foamed silicone and EPDM rubber, and the second sealing structure is made of one of polyurethane sealant, foamed silicone and EPDM rubber.

10. A battery pack, characterized in that: It comprises a distribution box, a battery assembly and a battery pack box as described in any one of claims 1-9.

11. An electrical device, characterized in that: Comprising the battery pack case according to any one of claims 1 to 9 or the battery pack according to claim 10.

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