Battery box and battery pack
By setting an annular sealant between the lower casing and the upper cover of the battery box, and using a sealant reservoir and an overflow reservoir to enhance the sealing effect, the problem of the sealing structure being susceptible to environmental influences is solved, resulting in more reliable sealing and cost savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
- Filing Date
- 2025-02-28
- Publication Date
- 2026-04-21
AI Technical Summary
The existing battery pack's sealing structure is susceptible to temperature and pressure differences during long-term use, which can lead to sealing failure and pose a safety hazard.
A ring-shaped sealant is used to seal and bond the lower housing and the upper cover. The sealing effect is enhanced by setting a glue reservoir and an overflow groove along the connection line, and the adhesive properties of the sealant are used to resist the influence of the external environment.
It improves the sealing reliability of the battery box, reduces the risk of seal failure, enhances safety and durability, reduces the amount of sealant used, and saves costs.
Smart Images
Figure CN224153468U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery structures, and in particular to a battery box and battery pack. Background Technology
[0002] Currently, in the design of battery packs, the commonly used sealing method is to place a gasket between the upper and lower casings. Considering factors such as sealing performance, operating temperature, cost, maintainability, and corrosion resistance, most gaskets are made of common foam. This sealing structure using foamed materials can be called a compression seal. By applying an appropriate amount of pre-compression to the gasket, the material's rebound force is used to press the cover tightly, thus achieving a seal.
[0003] During the long-term use of electric vehicle battery packs, the aforementioned sealing structure can experience internal and external pressure differences due to changes in temperature, altitude, and other factors. However, the sealing surface has a limited pressure tolerance. Once this pressure difference exceeds its limit, the sealing interface will fail, resulting in IP67 protection failure. Furthermore, the sealing gasket is highly susceptible to external influences, with the outermost side directly contacting the external environment. If the seal fails, it will lead to a safety hazard. Utility Model Content
[0004] The purpose of this application is to provide a battery box and battery pack, which uses an annular sealant between the lower box and the upper cover for sealing and bonding. Compared with the compression sealing method used in the prior art, the sealant bonding method is less susceptible to external environmental influences that could cause sealing failure, thereby ensuring a reliable seal between the lower box and the upper cover.
[0005] In a first aspect, this application provides a battery box, including a lower box body, an upper cover and a sealant, wherein the upper cover covers the opening end of the lower box body;
[0006] The overlapping area where the lower housing and the upper cover meet is provided with a first connecting edge, and the upper cover is provided with a second connecting edge corresponding to the first connecting edge;
[0007] The first connecting edge and the second connecting edge are annular, and at least one annular glue reservoir is provided on the side of the first connecting edge facing the second connecting edge or the side of the second connecting edge facing the first connecting edge. The sealant is filled in the glue reservoir to seal the first connecting edge and the second connecting edge.
[0008] In the above technical solution, when there are multiple glue storage tanks, the multiple glue storage tanks are arranged in a ring-shaped interval.
[0009] In the above technical solution, further, along the direction from the bottom to the opening of the glue storage tank, the distance between the two walls of the glue storage tank gradually increases;
[0010] The sealant filling area extends from the bottom of the storage tank to the edge of the storage tank.
[0011] In the above technical solution, a first protrusion adapted to the glue storage tank is further included;
[0012] The first protrusion is provided on the first connecting edge or the second connecting edge facing the glue storage tank. The first protrusion is placed in the glue storage tank and there is a gap between the first protrusion and the glue storage tank. The sealant fills the gap.
[0013] In the above technical solution, an overflow groove is further provided on the first connecting edge or the second connecting edge having the glue storage tank; one end of the overflow groove is connected to the glue storage tank, and the bottom of the overflow groove is higher than the bottom of the glue storage tank; the other end of the overflow groove extends to the outside.
[0014] In the above technical solution, the number of the overflow tanks is multiple, and the multiple overflow tanks are arranged at intervals around the periphery of the glue storage tank;
[0015] Along the direction from the bottom to the opening of the overflow tank, the distance between the two walls of the overflow tank gradually increases.
[0016] In the above technical solution, a second protrusion adapted to the overflow groove is further included;
[0017] The second protrusion is provided on the first connecting edge or the second connecting edge facing the overflow groove, the second protrusion is placed in the overflow groove, and there is a gap between the second protrusion and the bottom of the overflow groove, and the sealant fills the gap.
[0018] In the above technical solution, the inner edge of the first connecting edge is provided with an annular adhesive baffle, and the upper end of the adhesive baffle is close to the upper cover.
[0019] The above technical solution further includes multiple fasteners;
[0020] Multiple fasteners are spaced apart on the outside of the glue reservoir to connect the first connecting edge and the second connecting edge.
[0021] Secondly, this application also provides a battery pack, including the battery box described in the first aspect.
[0022] Compared with the prior art, the beneficial effects of this application are as follows:
[0023] The battery box provided in this application uses a ring-shaped sealant between the lower casing and the upper cover for sealing and bonding. Compared with the compression sealing method used in the prior art, the sealant bonding method is less susceptible to external environmental influences that could cause sealing failure, thus ensuring a reliable seal between the lower casing and the upper cover.
[0024] This application also provides a battery pack, including the battery box described in the above solution. Based on the above analysis, it is clear that the battery pack also possesses the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the battery box provided in this application;
[0027] Figure 2 For this application Figure 1 Schematic diagram of the cross-sectional structure at point AA;
[0028] Figure 3 For this application Figure 1 Schematic diagram of the cross-sectional structure at point BB;
[0029] Figure 4 This is a schematic diagram of the installation structure between the lower housing and the first connecting edge in this application;
[0030] Figure 5 for Figure 4 Sectional view at point CC.
[0031] In the diagram: 101-First connecting edge; 102-Second connecting edge; 103-Sealant; 104-Glue reservoir; 105-First protrusion; 106-Glue overflow groove; 107-Fastener; 108-Second protrusion; 109-Glue blocking edge; 110-Lower housing; 111-Top cover. Detailed Implementation
[0032] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0034] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0035] Example 1
[0036] See Figures 1 to 5 As shown, the battery box provided in this application includes a lower housing 110, an upper cover 111, and sealant 103. The upper cover 111 covers the opening end of the lower housing 110 to form a cavity for accommodating the battery module. A first connecting edge 101 is provided in the overlapping area where the lower housing 110 and the upper cover 111 are joined. The upper cover 111 is provided with a second connecting edge 102 corresponding to the first connecting edge 101. The first connecting edge 101 and the second connecting edge 102 are fitted together to connect the lower housing 110 and the upper cover 111 together.
[0037] Specifically, the first connecting edge 101 and the second connecting edge 102 are annular. At least one annular adhesive reservoir 104 is provided on the side of the first connecting edge 101 facing the second connecting edge 102 or on the side of the second connecting edge 102 facing the first connecting edge 101. Sealant 103 is filled in the reservoir 104 to seal the first connecting edge 101 and the second connecting edge 102. The lower housing 110 and the upper cover 111 can then be bonded using the annular sealant 103. Compared to the compression sealing method used in the prior art, the sealant 103 bonding method is less susceptible to external environmental influences that could cause sealing failure, thus ensuring a reliable seal between the lower housing 110 and the upper cover 111.
[0038] In an optional embodiment, when there are multiple glue storage tanks 104, the multiple glue storage tanks 104 are arranged in a ring-shaped interval.
[0039] In this embodiment, in order to improve the sealing between the first connecting edge 101 and the second connecting edge 102, a plurality of glue storage grooves 104 can be provided on the first connecting edge 101 or the second connecting edge 102 to accommodate the sealant 103, and the plurality of annular glue storage grooves 104 are sequentially nested from the inside to the outside, thereby achieving a multiple sealing effect.
[0040] In the optional solutions of this embodiment, such as Figure 2 As shown, along the direction from the bottom to the opening of the glue storage tank 104, the distance between the two tank walls of the glue storage tank 104 gradually increases, so that the glue storage tank 104 has a structure that is larger at the top and smaller at the bottom. When the sealant 103 is filled into the glue storage tank 104, it is easier to fill the glue storage tank 104 without gaps.
[0041] Furthermore, the filling area of the sealant 103 extends from the bottom of the storage tank 104 to the edge of the storage tank 104, increasing the coverage area of the sealant 103 and improving the sealing performance between the first connecting edge 101 and the second connecting edge 102.
[0042] In an optional embodiment, the battery box further includes a first protrusion 105 adapted to the glue storage tank 104; the first protrusion 105 is disposed on a first connecting edge 101 or a second connecting edge 102 facing the glue storage tank 104, the first protrusion 105 is placed in the glue storage tank 104, and there is a gap between the first protrusion 105 and the glue storage tank 104, and the sealant 103 fills the gap.
[0043] In this embodiment, such as Figure 2 As shown, the first connecting edge 101 is stamped to form a glue storage tank 104, and the second connecting edge 102 is correspondingly stamped to form a first protrusion 105. The structure of the glue storage tank 104, which is larger at the top and smaller at the bottom, allows the first protrusion 105 to be placed in the glue storage tank 104, and the sealant 103 is filled between the first protrusion 105 and the glue storage tank 104, which increases the bonding and sealing area between the first protrusion 105, the glue storage tank 104 and the sealant 103, reduces the sealing requirement size of the first connecting edge 101 and the second connecting edge 102, and improves energy density and space utilization. Moreover, this structure can reduce the amount of sealant 103 used, saving costs.
[0044] In an optional embodiment, an overflow groove 106 is also provided on the first connecting edge 101 or the second connecting edge 102 of the glue storage tank 104; one end of the overflow groove 106 is connected to the glue storage tank 104, and the bottom of the overflow groove 106 is higher than the bottom of the glue storage tank 104; the other end of the overflow groove 106 extends to the outside.
[0045] In this embodiment, when the sealant 103 is filled into the storage tank 104, a relatively large amount of sealant 103 is used to ensure a reliable seal. When the first protrusion 105 is placed in the storage tank 104, the sealant 103 in the storage tank 104 can be squeezed out. The sealant 103 overflowing from the storage tank 104 can be discharged through the overflow tank 106, preventing the sealant 103 from entering the internal cavity. Furthermore, the bottom of the overflow tank 106 is higher than the bottom of the storage tank 104, so that the sealant 103 in the storage tank 104 will not be completely discharged, and the storage tank 104 can store a certain amount of sealant 103 to achieve a sealing effect.
[0046] Figure 1 and Figure 4 The diagram shows a glue reservoir 104, with an overflow groove 106 connected to the reservoir 104 to drain overflowing sealant 103. For a plurality of sequentially nested glue reservoirs 104, the overflow groove 106 is connected to each reservoir 104 to drain overflowing sealant 103, and the sealant 103 in the overflow groove 106 can also bond to the opposite first connecting edge 101 or second connecting edge 102.
[0047] In this embodiment, there are multiple overflow troughs 106, and these multiple overflow troughs 106 are arranged at intervals around the periphery of the glue storage tank 104. Regardless of where the glue overflows from the glue storage tank 104, it can be discharged through the overflow trough 106 at the corresponding position.
[0048] Furthermore, such as Figure 5 As shown, the distance between the two walls of the overflow groove 106 gradually increases along the direction from the bottom to the opening of the groove. This gradual increase in distance between the two walls of the overflow groove 106 creates a structure that is wider at the top and narrower at the bottom, making it easier to fill the overflow groove 106 completely without gaps when the sealant 103 is applied.
[0049] In an optional embodiment, the battery box further includes a second protrusion 108 adapted to the overflow groove 106; the second protrusion 108 is disposed on the first connecting edge 101 or the second connecting edge 102 facing the overflow groove 106, the second protrusion 108 is placed in the overflow groove 106, and there is a gap between the second protrusion 108 and the bottom of the overflow groove 106, and the sealant 103 fills the gap.
[0050] In this embodiment, such as Figure 3As shown, the first connecting edge 101 is stamped to form an overflow groove 106, and the second connecting edge 102 is correspondingly stamped to form a second protrusion 108. The structure of the overflow groove 106, which is larger at the top and smaller at the bottom, allows the second protrusion 108 to be placed in the overflow groove 106, and the sealant 103 is filled between the second protrusion 108 and the overflow groove 106, which increases the bonding area between the second protrusion 108 and the overflow groove 106 and the sealant 103, and can reduce the amount of sealant 103 used, thus saving costs.
[0051] It should be noted that the side of the second protrusion 108 facing away from the overflow groove 106 has a groove structure, which can also play a role in drainage, preventing water accumulation and corrosion at the second connecting edge 102 of the cover 111.
[0052] In an optional embodiment, an annular sealing edge 109 is provided on the inner edge of the first connecting edge 101. The upper end of the sealing edge 109 is close to the upper cover 111. A secondary sealing area is formed between the sealing edge 109 and the upper cover 111, which improves the sealing effect between the first connecting edge 101 and the second connecting edge 102 and can prevent the sealant 103 from overflowing into the internal cavity.
[0053] Example 2
[0054] The battery box in this second embodiment is an improvement on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this second embodiment.
[0055] In an optional embodiment, the battery box further includes multiple fasteners 107. These fasteners 107 are spaced apart on the outer side of the adhesive storage tank 104 to connect the first connecting edge 101 and the second connecting edge 102, thereby reliably connecting the lower housing 110 and the upper cover 111. Specifically, the multiple fasteners 107 and multiple adhesive overflow tanks 106 are interleaved to ensure that the fasteners 107 and adhesive overflow tanks 106 are evenly distributed.
[0056] Example 3
[0057] Embodiment 3 of this application provides a battery pack, which includes the battery box of any of the above embodiments. Therefore, it has all the beneficial technical effects of the battery box of any of the above embodiments, which will not be repeated here.
[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application 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 or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.
Claims
1. A battery box characterized by, It includes a lower housing (110), an upper cover (111) and sealant (103), wherein the upper cover (111) covers the opening end of the lower housing (110); The overlapping area where the lower housing (110) and the upper cover (111) are fitted together is provided with a first connecting edge (101), and the upper cover (111) is provided with a second connecting edge (102) corresponding to the first connecting edge (101); the first connecting edge (101) and the second connecting edge (102) fit together; The first connecting edge (101) and the second connecting edge (102) are annular, and at least one annular glue storage groove (104) is provided on the side of the first connecting edge (101) facing the second connecting edge (102) or on the side of the second connecting edge (102) facing the first connecting edge (101). The sealant (103) is filled in the glue storage groove (104) to make the first connecting edge (101) and the second connecting edge (102) sealed together. An overflow groove (106) is also provided on the first connecting edge (101) or the second connecting edge (102) of the glue storage tank (104); one end of the overflow groove (106) is connected to the glue storage tank (104), and the bottom of the overflow groove (106) is higher than the bottom of the glue storage tank (104); the other end of the overflow groove (106) extends to the outside.
2. The battery pack of claim 1, wherein, When there are multiple glue storage tanks (104), the multiple glue storage tanks (104) are arranged in a ring-shaped interval.
3. The battery pack of claim 1, wherein, Along the direction from the bottom to the opening of the glue storage tank (104), the distance between the two walls of the glue storage tank (104) gradually increases; The filling area of the sealant (103) extends from the bottom of the storage tank (104) to the edge of the storage tank (104).
4. The battery pack of claim 1, wherein, It also includes a first protrusion (105) adapted to the glue reservoir (104); The first protrusion (105) is provided on the first connecting edge (101) or the second connecting edge (102) facing the glue storage tank (104), the first protrusion (105) is placed in the glue storage tank (104), and there is a gap between the first protrusion (105) and the glue storage tank (104), and the sealant (103) fills the gap.
5. The battery pack of claim 1, wherein, There are multiple overflow troughs (106), and the multiple overflow troughs (106) are arranged at intervals around the circumference of the glue storage tank (104); Along the direction from the bottom to the opening of the overflow groove (106), the distance between the two walls of the overflow groove (106) gradually increases.
6. The battery pack of claim 1, wherein, It also includes a second protrusion (108) adapted to the overflow groove (106); The second protrusion (108) is provided on the first connecting edge (101) or the second connecting edge (102) facing the overflow groove (106), the second protrusion (108) is placed in the overflow groove (106), and there is a gap between the second protrusion (108) and the bottom of the overflow groove (106), and the sealant (103) fills the gap.
7. The battery pack of claim 1, wherein, The inner edge of the first connecting edge (101) is provided with an annular adhesive baffle (109), and the upper end of the adhesive baffle (109) is close to the upper cover.
8. The battery pack of claim 1, wherein, It also includes several fasteners (107); Multiple fasteners (107) are spaced apart on the outside of the glue reservoir (104) to connect the first connecting edge (101) and the second connecting edge (102).
9. A battery pack, characterized by, Includes the battery box as described in any one of claims 1 to 8.