Battery pack shell and battery pack
By designing a combination of multi-directional gaps and elastic sealant in the battery pack casing, the sealing problem of traditional battery pack casings under vibration conditions is solved, achieving multi-directional sealing and dynamic compensation, thereby improving sealing performance and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional battery pack casing designs are prone to sealant detachment from the casing surface under vibration conditions, resulting in poor sealing performance and an inability to effectively cope with multi-directional stress, increasing the risk of seal failure.
The design of the connection structure between the box body and the lid creates horizontal and vertical gaps for sealant to fill, and uses elastic sealant to compensate for deformation in multiple directions, while a mechanical locking structure ensures a tight connection.
It achieves multi-directional sealing, prevents the intrusion of external substances, reduces the risk of seal failure, improves sealing performance and service life, and reduces assembly difficulty and cost.
Smart Images
Figure CN224036531U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a battery package shell and battery package. BACKGROUND
[0002] In the field of new energy power battery, the sealing reliability of the battery package shell directly determines the environmental adaptability and service life of the battery system. However, the traditional battery package shell design generally adopts a single plane compression joint to cooperate with sealing glue to realize sealing. This design is prone to cause local debonding between the sealing glue and the surface of the shell under vibration conditions due to uneven pressure distribution of the contact surface, thereby affecting the sealing effect, allowing external moisture, dust and other harmful substances to enter the inside of the battery package, and reducing the safety and service life of the battery. At the same time, the contact pressure in this design is linearly distributed, and a multidirectional stress buffering mechanism cannot be constructed, which means that under complex working environments, the sealing structure is difficult to effectively cope with the influence of multidirectional stress, further increasing the risk of sealing failure. SUMMARY
[0003] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a battery package shell and battery package with good sealing performance, simple structure and easy assembly.
[0004] The utility model solves the technical problems by adopting the technical scheme of a battery package shell, which comprises:
[0005] A box body having an opening, and a first connecting structure is arranged on the edge of the opening.
[0006] A box cover comprising a second connecting structure in plug-in cooperation with the first connecting structure; and when the first connecting structure is plugged into the second connecting structure, at least one horizontally extending first gap and at least one vertically extending second gap are formed, and the first gap and the second gap are accessible to sealing glue.
[0007] In the above-mentioned battery package shell, the first gap and the second gap are in communication with each other.
[0008] In the above-mentioned battery package shell, an elastic sealing glue is arranged on the first connecting structure or the second connecting structure; when the first connecting structure is plugged into the second connecting structure, the elastic sealing glue is elastically deformed and fills the first gap and the second gap.
[0009] In the above-mentioned battery package shell, the deformation direction of the elastic sealing glue includes compression deformation along the plug-in direction and expansion deformation perpendicular to the plug-in direction, and the deformation amount of the elastic sealing glue and the size change of the first gap and the second gap are in a dynamic compensation relationship.
[0010] In the battery pack shell, the first connecting structure is a protrusion, the second connecting structure is a groove, and the height and width of the groove are greater than the height and width of the protrusion to form the first gap and the second gap.
[0011] In the battery pack shell, the second connecting structure includes oppositely arranged first and second extending edges, and when the first connecting structure is plugged with the second connecting structure, the first connecting part is between the first and second extending edges and forms two second gaps respectively communicating with the first gap.
[0012] In the battery pack shell, further comprising a mechanical locking structure arranged between the box body and the box cover, and the mechanical locking structure is located on the side of the first gap and the second gap away from the inside of the box body.
[0013] In the battery pack shell, the mechanical locking structure includes a first fixing hole arranged on the box cover and a second fixing hole arranged on the opening edge, and a fastener can pass through the first fixing hole and the second fixing hole in sequence to fix the box cover on the box body.
[0014] In the battery pack shell, the first connecting structure is arranged circumferentially along the edge of the opening, the second connecting structure is arranged circumferentially along the box cover, the first connecting structure and the second connecting structure have a avoiding part extending horizontally towards the inside of the box body, and the avoiding part is opposite to the mechanical locking structure.
[0015] The utility model solves its technical problem adopts the technical scheme, further provides a kind of battery pack, it includes battery unit and above-mentioned battery pack shell, the battery unit is detachably built-in in the battery pack shell.
[0016] Compared with the prior art, the utility model has at least the following beneficial effects:
[0017] 1. In this utility model, a first connecting structure is provided on the edge of the opening of the casing, and a second connecting structure is provided on the casing cover to interlock with the first connecting structure. When the first connecting structure and the second connecting structure are interlocked, at least one horizontally extending first gap and at least one vertically extending second gap are formed, and both the first and second gaps allow sealant to enter. This design achieves multi-directional sealing of the battery pack casing, effectively preventing external moisture, dust, and other harmful substances from entering the battery pack from any direction, significantly improving the overall sealing performance. Furthermore, it allows the sealant to dynamically compensate in different stress directions, reducing the risk of seal failure due to localized stress concentration and extending the service life of the battery pack casing.
[0018] 2. In this invention, the first gap and the second gap are interconnected, allowing the sealant to be filled into both gaps simultaneously during the insertion process, eliminating the need for additional complex steps. This not only reduces assembly difficulty but also improves production efficiency and reduces manufacturing costs.
[0019] 3. In this utility model, a mechanical locking structure is provided between the casing and the cover, and the mechanical locking structure is located on the side of the first and second gaps away from the inside of the casing. This design not only provides additional physical fixing force for the battery pack casing, ensuring a tight connection between the casing and the cover, but also allows the original sealing design to maintain its integrity, avoiding the problem of the sealing surface being interfered with by the bolt preload in the traditional design, and further ensuring the sealing effect. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a battery pack shell according to the present invention.
[0021] Figure 2 This is a cross-sectional view of a battery pack casing according to the present invention.
[0022] Figure 3 This is an exploded view of the battery pack casing of this utility model.
[0023] Figure 4 This is a schematic diagram of the structure of the box cover in this utility model.
[0024] Figure 5 This is a cross-sectional view of the present invention after concealing the elastic sealant.
[0025] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:
[0026] 100. Box body; 101. Opening; 102. Receiving cavity; 110. First connecting structure; 111. Clearance part; 200. Box cover; 210. Second connecting structure; 211. First extending edge; 212. Second extending edge; 300. First gap; 310. Second gap; 400. Elastic sealant; 500. Mechanical locking structure; 510. First fixing hole; 520. Second fixing hole; 530. Countersunk hole; 600. Fastener. Detailed Implementation
[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0029] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0032] like Figures 1 to 5 As shown, in this embodiment, a battery pack casing includes:
[0033] The housing 100 has an opening 101, and the edge of the opening 101 is provided with a first connecting structure 110:
[0034] The cover 200 includes a second connecting structure 210 that interlocks with the first connecting structure 110. When the first connecting structure 110 and the second connecting structure 210 are interlocked, at least one horizontally extending first gap 300 and at least one vertically extending second gap 310 are formed, allowing sealant to enter. This design allows sealant to fill in multiple directions and provide a reliable seal. This multi-directional sealing design effectively prevents external moisture, dust, and other harmful substances from entering the battery pack from any direction, significantly improving overall sealing performance. Furthermore, it allows the sealant to dynamically compensate in different stress directions, reducing the risk of seal failure due to localized stress concentration and extending the service life of the battery pack casing.
[0035] Specifically, such as Figures 1 to 5 As shown, in this embodiment, the battery pack casing mainly consists of a housing 100 and a cover 200. The housing 100 is rectangular and has a hollow structure with an opening 101, and the opening 101 has a horizontally extending edge from the outside to the inside. The cover 200 closes onto the opening 101 of the housing 100, and the cover 200, together with the housing 100, forms a sealed receiving cavity 102 for accommodating the battery cells.
[0036] In traditional battery pack casing designs, sealing typically relies on unidirectional sealant filling, which results in insufficient sealing strength and a tendency for delamination under complex operating conditions. To improve the sealing performance after the casing 100 and the cover 200 are connected, in this embodiment, a first connecting structure 110 is provided on the side of the opening 101 facing the cover 200, and a second connecting structure 210 is provided on the side of the cover 200 facing the casing 100, which engages with the first connecting structure 110. When the first connecting structure 110 and the second connecting structure 210 are engaged, at least one horizontally extending first gap 300 and at least one vertically extending second gap 310 are formed. Through the engagement of the first gap 300 and the second gap 310, the sealant can be filled in multiple directions between the casing 100 and the cover 200, effectively expanding the sealant coverage area and providing a reliable sealing effect. Simultaneously, the sealant filling in multiple directions enables dynamic compensation in different stress directions. This multi-directional stress buffering mechanism significantly enhances the adaptability and reliability of the sealing structure, reducing the risk of seal failure due to vibration or temperature changes.
[0037] In the embodiment, the first connecting structure 110 is arranged along the edge of the opening 101 in a circumferential direction, and the second connecting structure 210 is arranged along the edge of the box cover 200 in a circumferential direction. This design ensures that the first gap 300 and the second gap 310 can form a continuous sealing area around the entire interface of the battery pack shell, avoiding the possible local non-sealing area, providing all-round sealing protection, and ensuring that harmful substances such as external moisture and dust cannot enter the inside of the battery pack from any direction.
[0038] In the embodiment, the first connecting structure 110 and the second connecting structure 210 have a relief portion 111 extending horizontally towards the inside of the box body 100, and the relief portion 111 is opposite to the mechanical locking structure 500. Through the inner convex design of the local structure of the first connecting structure 110 and the second connecting structure 210, the box body 100 and the box cover 200 have mounting positions for the mechanical locking structure 500 arranged on the edges, which significantly reduces the occupation of external space; and also makes the edges of the box body 100 and the box cover 200 keep neat and consistent, avoiding irregular shape or protrusion caused by external locking structure, further enhancing the consistency and aesthetics of the overall design.
[0039] Preferably, in the embodiment, the relief portion 111 is in a semicircular arc shape, and the diameter is greater than the diameter of the first fixing hole 510 and the second fixing hole 520.
[0040] In the embodiment, the first connecting structure 110 is a strip-shaped protrusion arranged along the edge of the opening 101 in a circumferential direction and vertically extending towards the box cover 200, wherein the part of the first connecting structure 110 opposite to the position of the second fixing hole 520 protrudes horizontally towards the inside of the box body 100 to form the relief portion 111.
[0041] In the embodiment, the second connecting structure 210 is a strip-shaped groove arranged along the edge of the box cover 200 in a circumferential direction and vertically extending towards the box body 100, wherein the part of the second connecting structure 210 opposite to the position of the first fixing hole 510 protrudes horizontally towards the inside of the box body 100 to form the relief portion 111. Preferably, the height and width of the groove are greater than the height and width of the protrusion to form the first gap 300 and the second gap 310.
[0042] In the embodiment, the first gap 300 and the second gap 310 are perpendicular to each other and communicate with each other, so that the sealant can be filled into the first gap 300 and the second gap 310 at the same time during the insertion process, without the need for additional complex operation steps. This not only reduces the assembly difficulty, but also improves the production efficiency and reduces the manufacturing cost.
[0043] In the embodiment, the second connecting structure 210 comprises oppositely arranged first and second extending edges 211 and 212; when the first connecting structure 110 is plugged with the second connecting structure 210, the protrusion is located between the second extending edge 212 and the second extending edge 212, and two second gaps 310 respectively communicating with the first gap 300 are formed. The design further expands the coverage area of the sealant, so that the sealant can be uniformly filled in multiple directions and provide reliable sealing effect, significantly improving the overall sealing performance.
[0044] In the embodiment, the elastic sealant 400 is arranged on the first connecting structure 110 or the second connecting structure 210; when the first connecting structure 110 is plugged with the second connecting structure 210, the elastic sealant 400 is elastically deformed to fill the first gap 300 and the second gap 310. Preferably, it is arranged on the second connecting structure 210. Compared with being arranged on the first connecting structure 110, being arranged on the second connecting structure 210 is easier to control the amount and distribution of the sealant, and can ensure that the sealant is more evenly distributed in the first gap 300 and the second gap 310 during plugging, avoiding the problem of local accumulation or deficiency, and ensuring the consistency and reliability of the sealing effect.
[0045] In the embodiment, the elastic sealant 400 is a sealing material with elasticity, which can produce three-dimensional deformation during plugging and fill the first gap 300 and the second gap 310 to provide reliable sealing effect. It is worth noting that the present scheme can also use a non-elastic sealant, i.e. an epoxy sealant that forms a hard sealing layer after curing, which is arranged on the second connecting structure 210 in the form of sealant.
[0046] In the embodiment, the deformation direction of the elastic sealant 400 includes compression deformation along the plugging direction and expansion deformation perpendicular to the plugging direction, and the deformation amount is in a dynamic compensation relationship with the size of the first gap 300 and the second gap 310. By making the elastic sealant 400 deform in multiple directions during plugging, a multi-directional sealing effect is achieved, which can effectively prevent harmful substances such as external moisture and dust from entering the inside of the battery pack from any direction, significantly improving the overall sealing performance. The deformation amount of the elastic sealant 400 is dynamically adjusted according to the actual size of the first gap 300 and the second gap 310, ensuring that the sealant can be evenly distributed and completely fill the gaps to form an effective sealing layer.
[0047] To ensure the reliability of the connection between the box body 100 and the box cover 200, in the embodiment, a mechanical locking structure 500 is arranged between the box body 100 and the box cover 200, and the mechanical locking structure 500 is located on the side of the first gap 300 and the second gap 310 away from the inside of the box body 100, and preferably, the mechanical locking structure 500 is provided with multiple groups. This design not only provides additional physical fixing force for the battery pack shell, ensures the tight connection between the box body 100 and the box cover 200, but also enables the original sealing design to maintain its integrity, avoids the problem that the sealing surface is interfered by the bolt pre-tightening force in the traditional design, and further guarantees the sealing effect.
[0048] In the embodiment, the mechanical locking structure 500 includes a first fixing hole 510 arranged on the box cover 200 and a second fixing hole 520 arranged on the edge of the opening 101, and the fastener 600 can pass through the first fixing hole 510 and the second fixing hole 520 in sequence to fix the box cover 200 on the box body 100. This design not only ensures the firmness and sealing property of the battery pack shell, but also simplifies the assembly process.
[0049] Preferably, in the embodiment, a sunken hole 530 is further arranged above the first fixing hole 510, the sunken hole 530 is in communication with and coaxial with the first fixing hole 510, and the diameter of the sunken hole 530 is greater than that of the first fixing hole 510, for accommodating the head of the fastener 600. This design makes the end of the fastener 600 not protrude from the surface of the box cover 200, maintains the flatness and smoothness of the surface of the box cover 200, and thus improves the aesthetic appearance of the overall appearance.
[0050] Preferably, in the embodiment, the fastener 600 is a bolt or a screw.
[0051] The utility model embodiment further provides a battery pack, which comprises a battery cell (not shown in the figure) and the above-mentioned battery pack shell, and the battery cell is detachably built in the battery pack shell. This design effectively improves the safety of the battery pack in use, and the convenience of disassembly and maintenance of the battery cell.
Claims
1. A battery pack casing, characterized in that, include: A housing (100) having an opening (101) and a first connecting structure (110) provided along the edge of the opening (101): The lid (200) includes a second connecting structure (210) that is inserted into the first connecting structure (110); and when the first connecting structure (110) is inserted into the second connecting structure (210), at least one horizontally extending first gap (300) and at least one vertically extending second gap (310) are formed, and the first gap (300) and the second gap (310) are open to sealant.
2. The battery pack casing according to claim 1, characterized in that, The first gap (300) and the second gap (310) are interconnected.
3. A battery pack casing according to claim 2, characterized in that, It includes an elastic sealant (400), which is disposed on the first connecting structure (110) or the second connecting structure (210); when the first connecting structure (110) and the second connecting structure (210) are inserted, the elastic sealant (400) undergoes elastic deformation and fills the first gap (300) and the second gap (310).
4. A battery pack casing according to claim 3, characterized in that, The deformation direction of the elastic sealant (400) includes compression deformation along the insertion direction and expansion deformation perpendicular to the insertion direction, and its deformation is dynamically compensated for the size changes of the first gap (300) and the second gap (310).
5. A battery pack casing according to claim 1, characterized in that, The first connecting structure (110) is a protrusion, and the second connecting structure (210) is a groove, and the height and width of the groove are greater than the height and width of the protrusion, so as to form the first gap (300) and the second gap (310).
6. A battery pack casing according to claim 1, characterized in that, The second connecting structure (210) includes a first extension edge (211) and a second extension edge (212) arranged opposite to each other; when the first connecting structure (110) is inserted into the second connecting structure (210), the first connecting structure (110) is located between the first extension edge (211) and the second extension edge (212), and forms two second gaps (310) that are respectively connected to the first gap (300).
7. A battery pack casing according to claim 5, characterized in that, It also includes a mechanical locking structure (500) disposed between the housing (100) and the cover (200), and the mechanical locking structure (500) is located on the side of the first gap (300) and the second gap (310) away from the interior of the housing (100).
8. A battery pack casing according to claim 7, characterized in that, The mechanical locking structure (500) includes a first fixing hole (510) on the cover (200) and a second fixing hole (520) on the edge of the opening (101), and the fastener (600) can pass through the first fixing hole (510) and the second fixing hole (520) in sequence to fix the cover (200) on the box body (100).
9. A battery pack casing according to claim 7, characterized in that, The first connecting structure (110) is arranged circumferentially along the edge of the opening (101), and the second connecting structure (210) is arranged circumferentially along the cover (200). The first connecting structure (110) and the second connecting structure (210) have a clearance portion (111) extending horizontally toward the interior of the box (100), and the clearance portion (111) is opposite to the mechanical locking structure (500).
10. A battery pack, characterized in that, It includes a battery cell and a battery pack housing as described in any one of claims 1 to 9, wherein the battery cell is detachably housed within the battery pack housing.