Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack. The battery box comprises a box body, the box body is provided with a containing cavity used for containing a battery and a vulnerable device, and a mounting opening used for mounting the battery and the vulnerable device; the cover body covers the mounting opening and shields the mounting opening, the cover body is connected with the box body in a sealing and welding mode, and the cover body is provided with a through hole communicating with the containing cavity; and the sealing cover detachably covers the through hole and shields and seals the through hole, and the vulnerable device can be exposed through the through hole. The problem that in the prior art, the battery pack assembling process is complex is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a battery box and battery package. BACKGROUND

[0002] With the continuous development of battery direct integration technology (ie CTP technology, cell to pack) technology, the scheme of module is gradually eliminated, the biggest difference between CTP and module scheme is that the support of module frame is reduced, and the expansion of the battery is directly constrained through the box body, however, the top of the box body is generally open, and the sealing is realized through the cover, the cover is generally connected with the box body by using bolts or glue, and also plays a sealing role. However, the connection mode of the cover and the box body in the above-mentioned traditional way is complex, and the tensile strength of the connection part of the cover and the box body is also weak, when the battery expands and extrudes the box body, the connection part is easy to break. SUMMARY

[0003] The main purpose of the utility model is to provide a battery box and battery package, so as to solve the problems of complex assembly process and weak tensile strength of the connection part of the cover and the box body in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery box is provided, which comprises: a box body, the box body has a containing cavity for containing a battery and a fragile device, and a mounting opening for mounting the battery and the fragile device; a cover, the cover is arranged at the mounting opening and covers the mounting opening, the cover is sealingly welded with the box body, the cover has a through hole communicating with the containing cavity, and the fragile device can be exposed through the through hole; a sealing cover, the sealing cover is detachably arranged at the through hole and covers the sealing through hole.

[0005] Further, the box body comprises a side beam, the circumferential side edge of the cover is provided with a connecting part, the connecting part is lapped on the side beam, and the opposite surfaces of the connecting part and the side beam are arranged in close contact, and the cover is welded with the side beam through the connecting part.

[0006] Further, the side of the connecting part away from the box body is provided with a guide groove opened along the thickness direction of the cover, and the guide groove extends along the circumferential side of the cover.

[0007] Further, the connecting part is provided with a plurality of positioning holes for connecting with the box body, and the plurality of positioning holes are arranged along the circumferential side of the cover.

[0008] Further, the positioning hole is two, at least one positioning hole extends a predetermined length along the length direction of the side beam, so as to adjust the mounting position of the cover.

[0009] Further, the box body comprises side beams, and the cover body has at least two opposite side edges with flanges extending towards the box body.

[0010] Further, the battery box further comprises a sealing member arranged between the sealing cover and the cover body and surrounding the circumferential side of the through hole to seal the gap between the sealing cover and the cover body when the sealing cover is closed.

[0011] Further, the circumferential edge of the through hole is provided with a first connecting structure, the sealing cover is provided with a second connecting structure, the first connecting structure and the second connecting structure are in abutment to connect the sealing cover and the cover body, and the first connecting structure is located outside the sealing member in the circumferential direction.

[0012] Further, the cover body is provided with a positioning groove located at the circumferential side of the through hole, and at least a part of the sealing member is embedded in the positioning groove.

[0013] According to another aspect of the utility model, a battery pack is provided, which comprises a battery, a vulnerable device and the above-mentioned battery box, and the battery and the vulnerable device are accommodated in the battery box.

[0014] The technical scheme of the utility model is applied, the mounting opening is directly arranged on the box body, the cover body is directly connected to the box body in a welding manner, the structure of the bolt connection between the conventional cover and the box body is saved, the whole assembly process is simpler and faster, the assembly efficiency is improved, the connection between the cover body and the box body can bear greater tensile stress, and is not easy to break at the connection during the tensile process. Meanwhile, the through hole is arranged on the cover body, the through hole can facilitate the personnel to perform the maintenance operation on the vulnerable device in the accommodating cavity, thereby further improving the convenience of use, thereby avoiding the problem that the cover body cannot be disassembled and maintained due to welding, and the sealing cover is further arranged in cooperation with the cover body, thereby achieving the shielding and sealing of the through hole and ensuring the sealing performance of the battery box during normal use. On the one hand, the sealing and welding connection between the cover body and the box body significantly improves the sealing performance and the fixing strength of the battery box, effectively improves the tensile capacity of the connection between the cover body and the box body, cancels the traditional bolt connection, simplifies the box structure, reduces the assembly parts, thereby reducing the production cost and the assembly difficulty and improving the production efficiency; on the other hand, the through hole on the cover body and the detachable sealing cover enable the vulnerable device inside the battery pack to be quickly and conveniently checked, maintained or replaced, thereby reducing the maintenance time and cost and improving the maintenance efficiency and the service life of the battery box. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the present application serve to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 An exploded view of the battery pack of an embodiment of the present application is shown;

[0017] Figure 2 An exploded view of Figure 1 A top view of the battery pack after the seal cover is removed;

[0018] Figure 3 An exploded view of Figure 1 An enlarged view of A in the middle;

[0019] Figure 4 A structure schematic view of the cover of the battery pack of another embodiment of the present application is shown;

[0020] Figure 5 An exploded view of Figure 4 An enlarged view of B in the middle;

[0021] Figure 6 An exploded view of Figure 4 An enlarged view of C in the middle.

[0022] Among them, the above drawings include the following reference signs:

[0023] 10, box body; 11, side beam; 20, cover; 21, first connecting structure; 22, positioning groove; 23, reinforcing structure; 24, through hole; 25, guide groove; 26, positioning hole; 27, flange; 30, battery; 31, vulnerable device; 40, seal cover; 41, second connecting structure; 50, sealing element. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0026] In the present application, unless otherwise specified, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0027] In order to solve the problem of complex battery package assembly process in the prior art, the utility model provides a battery box and battery package.

[0028] As Figures 1 to 3 A battery box shown in the figure, including: box body 10, lid 20 and sealing cover 40, box body 10 has the containing cavity for containing battery 30 and fragile device 31, and the installation opening for loading battery 30 and fragile device 31, lid 20 covers and sets at installation opening, and shields installation opening, lid 20 is sealed and welded with box body 10, lid 20 has the through -hole 24 that communicates with containing cavity, and fragile device 31 can be exposed through through -hole 24, sealing cover 40 is detachably covered and set at through -hole 24, and shields sealing through -hole 24.

[0029] The embodiment is directly provided with installation opening on box body 10, and lid 20 is directly connected on box body 10 in the mode of welding, thereby saving the structure of bolt connection between conventional lid and box body, making the whole assembly process more simple and fast, improving assembly efficiency, and the mode also makes the connection of lid 20 and box body 10 can bear greater tensile stress, and is not easy to break at the connection in tensile. Meanwhile, the embodiment is also provided with through -hole 24 on lid 20, the setting of through -hole 24 can facilitate personnel to overhaul device in containing cavity and other operations, thereby further improving the convenience of use, thereby avoiding the problem that lid 20 cannot be overhauled because of welding, and sealing cover 40 is also provided in cooperation, sealing cover 40 cooperates with lid 20, thereby realizing the shielding and sealing of through -hole 24, guaranteeing the sealing property of battery box in normal use. The above design, on the one hand, through the sealed welding connection of lid 20 and box body 10, significantly improves the sealing performance and fixing strength of battery box, effectively improves the tensile capacity of the connection of lid 20 and box body 10, cancels the traditional bolt connection at the same time, simplifies the box structure, reduces assembly parts, thereby reducing production cost and assembly difficulty, improving production efficiency, on the other hand, the design of through -hole 24 on lid 20 and detachable sealing cover 40 makes fragile device 31 in the battery package can be quickly and conveniently checked, repaired or replaced, reduces maintenance time and cost, improves the maintenance efficiency and service life of battery box.

[0030] As Figure 1 And Figure 3As shown, in some embodiments, the box body 10 includes side beams 11 arranged on the outer side of the box body 10 as the side of the accommodating cavity. The circumferential edge of the cover body 20 has a connecting portion that overlaps the side beams 11, and the opposite surfaces of the connecting portion and the side beams 11 are arranged in abutment. The cover body 20 is welded to the side beams 11 of the box body 10 through the connecting portion to close the accommodating cavity. The arrangement of the connecting portion makes the welding of the connecting portion and the top surface of the side beams 11 more stable, ensuring that the two can form a more tight connection with almost no gap, thereby significantly enhancing the sealing performance of the battery box and significantly improving the mechanical strength of the connection as a whole, reducing the risk of box deformation and improving the structural stability of the battery box. The welding method of the present embodiment uses laser welding, but other welding methods can also be used as long as the welding is firm and sealed.

[0031] Optionally, the area of the connecting portion in contact with the side beams should be large enough to ensure the welding area, thereby improving the connection strength and stability. The material of the cover body 20 should be able to be welded to the box body 10, for example, both the cover body 20 and the box body 10 are made of aluminum, but the material of the cover body 20 and the material of the box body 10 can also be other materials that can be welded and connected as long as the cover body 20 can be reliably welded to the box body 10.

[0032] In some embodiments, as shown in Figures 4 to 6 The connecting portion of the cover body 20 of the present embodiment has a guide groove 25 formed along the thickness direction of the cover body 20. The guide groove 25 extends along the circumferential side of the cover body 20 and is located on the side of the connecting portion away from the box body 10. The guide groove 25 is formed in a thinned arrangement on the connecting portion, and the depth thereof is preferably less than 0.2 mm. The guide groove 25 is used to position the welding track during welding, thereby ensuring the accuracy of welding and the welding effect between the cover body 20 and the box body 10. The welding track can be arranged along the guide groove 25 or inside or outside the guide groove 25, which is not limited herein.

[0033] In some embodiments, as shown in Figure 5 and Figure 6 The connecting portion also has positioning holes 26 for connecting with the box body 10. The positioning holes 26 are multiple and arranged along the circumferential side of the cover body 20. The arrangement of the positioning holes 26 enables the preliminary fixation of the position of the cover body 20 during welding, thereby ensuring the welding effect. Specifically, threaded holes can be arranged on the side beams 11 in correspondence, and the preliminary fixation can be achieved by connecting the threaded holes and the positioning holes through bolts.

[0034] Optionally, in some embodiments, the positioning hole 26 is two, at least one positioning hole 26 extends along the surface of the cover body 20 for a predetermined length, so that the positioning hole 26 is not a circular hole, but is formed in the form of an elongated shape such as an oval hole, so that the locking position at the positioning hole 26 can be adjusted, and the adjustment of the position of the fixing member in the positioning hole 26 is used to adjust the installation position of the cover body 20 to adapt to the error in production and processing, so as to ensure the accuracy of the position, and further ensure the stability of the welding position. Specifically, the positioning hole 26 in the form of a circular hole and the positioning hole 26 in the form of an elongated hole are arranged at the same time, and are respectively located at opposite sides of the cover body 20.

[0035] In some embodiments, as shown in Figure 5 The cover body 20 of the present embodiment has at least two opposite sides with a flange 27 extending towards the direction close to the box body 10, i.e. a downwardly bent and extended flange 27, which is used to abut with the surface of the side beam 11 away from the accommodating cavity, thereby facilitating the positioning of the installation position of the cover body 20 on the box body 10, and ensuring the accuracy of the installation position of the cover body 20.

[0036] As shown in Figure 1 and Figure 3 In some embodiments, the battery box further comprises a sealing member 50, which is arranged between the sealing cover 40 and the cover body 20 and surrounds the periphery of the through hole 24, so as to seal the gap between the sealing cover 40 and the cover body 20 when the sealing cover 40 is closed. Specifically, the sealing member 50 is designed as a separate component, which is arranged between the detachable sealing cover 40 and the cover body 20 and located at the periphery of the through hole 24. When the sealing cover 40 is closed, the sealing member 50 can tightly fill the gap between the sealing cover 40 and the cover body 20, providing an additional sealing layer to ensure that the sealing performance of the inside of the battery box is not affected, and the sealing member 50 is arranged to ensure that the sealing member 50 is evenly arranged on the contact surface between the sealing cover 40 and the cover body 20. In this way, on the one hand, by arranging the sealing member 50 between the sealing cover 40 and the cover body 20, the periphery of the through hole 24 is effectively sealed, the sealing performance of the battery box is enhanced, the influence of external environmental factors on the internal battery 30 is prevented, and the reliability of the battery box is improved; on the other hand, the arrangement of the sealing member 50 reduces the direct contact between the sealing cover 40 and the cover body 20, reduces the wear or deformation of the contact position of the cover body 20 or the sealing cover 40, and reduces the need to replace related components caused by the wear or deformation of the contact position of the cover body 20 or the sealing cover 40, thereby reducing the maintenance cost.

[0037] Optionally, the material, shape and size of the sealing member 50 should be selected according to the actual application environment, and should have good elasticity, aging resistance and chemical corrosion resistance, and be able to maintain its sealing performance under normal working conditions of the battery box. The shape and size of the sealing member 50 are designed to ensure that it can seamlessly surround the through hole 24, as long as it can ensure good sealing effect.

[0038] As shown in Figure 1 and Figure 3 In some embodiments, the first connecting structure 21 is arranged at the circumferential edge of the through hole 24, and the sealing cover 40 is provided with a second connecting structure 41, the first connecting structure 21 and the second connecting structure 41 are in butt joint to connect the sealing cover 40 and the cover body 20. Specifically, the first connecting structure 21 is arranged at the circumferential edge of the through hole 24, and the first connecting structure 21 is arranged to be accurately butt jointed with the second connecting structure 41 on the sealing cover 40, so as to ensure that the sealing cover 40 is stably connected to the cover body 20. The second connecting structure 41 is arranged on the sealing cover 40 and is matched with the first connecting structure 21, and when the sealing cover 40 is arranged at the through hole 24, the second connecting structure 41 is butt jointed with the first connecting structure 21 to form a stable connection. In this way, on the one hand, through the butt joint of the first connecting structure 21 and the second connecting structure 41, the connection between the sealing cover 40 and the cover body 20 is more stable and reliable, and is not easy to be loosened by external factors, thereby further improving the sealing performance of the battery box and protecting the internal battery 30 from the influence of the external environment. On the other hand, the sealing cover 40 is easy to disassemble and assemble, thereby reducing the maintenance time and cost and improving the maintainability of the battery box. For example, the first connecting structure 21 of the present embodiment has a threaded structure, the second connecting structure 41 is a through hole, and a screw or a bolt is fixedly connected with the first connecting structure 21 after penetrating through the second connecting structure 41. Of course, other structures can also be selected for connection and fixation.

[0039] Optionally, the first connecting structure 21 and the second connecting structure 41 can be buckles or other forms of mechanical connecting structures, as long as the first connecting structure 21 and the second connecting structure 41 on the sealing cover 40 can be accurately butt jointed, so as to ensure that the sealing cover 40 is stably connected to the cover body 20.

[0040] In some embodiments, the first connecting structure 21 has a sealing part and a connecting part, the connecting part is used for connecting and matching with the second connecting structure 41, and the sealing part is used for sealing the gap between the first connecting structure 21 and the second connecting structure 41 to seal the accommodating cavity. Specifically, at the circumferential edge of the through hole 24, the first connecting structure 21 includes a connecting part for butt jointing with the second connecting structure 41 on the sealing cover 40. In addition to the connecting part, the first connecting structure 21 also has a sealing part. The sealing part is located around the connecting part, and when the second connecting structure 41 is butt jointed with the connecting part, the sealing part can effectively seal the gap between the first connecting structure 21 and the second connecting structure 41, thereby further improving the sealing performance at the through hole 24. In this way, the butt joint of the connecting part and the second connecting structure 41 ensures the stable fixation of the sealing cover 40, and the design of the sealing part provides an additional sealing layer, thereby forming an additional sealing around the connecting part and achieving a double-protected sealing effect, thereby further ensuring the sealing performance of the battery box.

[0041] Specifically, the connecting part of the first connecting structure 21 is a plurality of pull rivet nuts, and the sealing part is a sealing ring corresponding to the plurality of pull rivet nuts, so that the first connecting structure 21 is a pull rivet nut with a sealing ring. The pull rivet nut can be integrally arranged on the cover body 20, or can be arranged in a split manner on the cover body 20. When split, a through hole can be arranged on the cover body 20 to facilitate the arrangement of the pull rivet nut. Correspondingly, the second connecting structure 41 can be arranged as a threaded hole or a through hole with a smooth inner surface. Of course, the first connecting structure 21 and the second connecting structure 41 can also adopt other structural forms. For example, the first connecting structure 21 and the second connecting structure 41 are both threaded holes, and an ordinary screw can be additionally arranged in the threaded hole to achieve the connection effect.

[0042] Optionally, the material of the sealing part should have good elasticity and sealing performance, such as rubber, silicone, etc., to adapt to temperature and pressure changes in different working environments. Of course, other functionally similar materials can be selected as long as they can ensure the sealing performance.

[0043] As shown in Figure 3 In some embodiments, the first connecting structure 21 is located on the circumferential outer side of the sealing member 50. In this way, when the sealing cover 40 is closed, the sealing member 50 will be clamped by the cover body 20 and the sealing cover 40 through the connection of the first connecting structure 21 and the second connecting structure 41. This position design can separate the sealing relationship between the first connecting structure 21 and the second connecting structure 41 from the sealing relationship on the circumferential side of the through hole 24, that is, the arrangement of the first connecting structure 21 and the second connecting structure 41 will not affect the sealing effect of the sealing member 50, and vice versa. The sealing of the sealing member 50 will not affect the sealing between the first connecting structure 21 and the second connecting structure 41, thereby avoiding the mutual influence between the two seals and further improving the reliability of the overall sealing. At the same time, it also ensures that the sealing member 50 can be uniformly stressed when the sealing cover 40 is closed, avoids deformation or damage of the sealing member 50 caused by the compression of the connecting structure, and improves the reliability and effect of the sealing.

[0044] As shown in Figure 1As shown, in some embodiments, the first connecting structures 21 and the second connecting structures 41 are both multiple and arranged equidistantly along the circumference of the through hole 24. Specifically, at the circumferential edge of the through hole 24, multiple first connecting structures 21 are designed, and by arranging multiple first connecting structures 21, the force can be more evenly dispersed to the entire circumferential side of the through hole 24, avoiding local excessive stress, and improving the stability and uniformity of the connection between the sealing cover 40 and the cover body 20. Similarly, on the sealing cover 40, multiple second connecting structures 41 are correspondingly arranged, which are equal in number and matched in shape with the first connecting structures 21. When the sealing cover 40 is arranged at the through hole 24, the second connecting structures 41 can be docked with the first connecting structures 21 one by one to form multiple point stable connections, enhancing the fixing effect of the sealing cover 40, and the first connecting structures 21 and the second connecting structures 41 are arranged equidistantly along the circumference of the through hole 24. This arrangement ensures the uniformity of the connection between the sealing cover 40 and the cover body 20 around the through hole 24, and even if the battery 30 generates expansion force in different areas, the force can be dispersed through multiple connection points to avoid deformation or sealing failure caused by excessive pressure on a certain point. In one aspect, by arranging the multiple first connecting structures 21 and the second connecting structures 41 equidistantly along the circumference, the uniformity and stability of the connection between the sealing cover 40 and the cover body 20 are significantly improved, reducing the risk of sealing failure caused by uneven force distribution; on the other hand, the arrangement of multiple connecting structures increases the number of points of contact between the sealing cover 40 and the cover body 20, thereby enhancing the sealing effect and the overall structural strength of the battery box, even when the battery 30 expands or is subjected to external impact, the sealing performance can be maintained, ensuring the stability and safety of the battery box under various environmental and use conditions.

[0045] As Figure 1 and Figure 3As shown, in some embodiments, the cover 20 has a positioning groove 22 located around the through hole 24, and at least a portion of the sealing member 50 is embedded in the positioning groove 22. Specifically, a positioning groove 22 is designed around the through hole 24 of the cover 20. The depth and width of the positioning groove 22 should match the size of the sealing member 50 to ensure that the sealing member 50 can be stably fixed and limited when embedded, and will not move. A portion of the sealing member 50 is designed to be embedded in the positioning groove 22. When the sealing member 50 is embedded in the positioning groove 22, it can form a tight fit with the positioning groove 22, so that the sealing member 50 can remain stable when the battery box is subjected to external impact or vibration, and will not affect the sealing effect due to positional displacement. The design of the positioning groove 22 not only limits the position of the sealing member 50, but also ensures that the sealing member 50 can be evenly compressed when the sealing cover 40 is closed, forming a tight sealing layer and improving the sealing performance of the entire battery box. On the one hand, the embedded design of the positioning groove 22 and the seal 50 ensures that the seal 50 remains in the set position even when the battery box is subjected to vibration or impact, thus ensuring the sealing effect. On the other hand, the design of the positioning groove 22 makes the installation and replacement of the seal 50 simpler. The seal 50 can be inserted along the positioning groove 22 without the need for additional positioning tools, which improves maintenance efficiency and ease of operation.

[0046] Optionally, the specific structure of the positioning groove 22 can be set according to the shape and size of the seal 50, or the specific structural shape and size of the seal 50 can be designed according to the specific structure of the positioning groove 22, as long as the seal 50 can be accurately installed into the positioning groove 22 and the sealing effect is guaranteed.

[0047] like Figures 1 to 3 As shown, in some embodiments, the cover 20 has a reinforcing structure 23 extending along the surface of the cover 20. The reinforcing structure 23 is mainly located in the middle of the cover 20 and can be either a reinforcing protrusion or a reinforcing recess. The reinforcement structure 23 significantly increases the bending strength and compressive strength of the cover 20, reduces deformation under stress, and provides additional support when the cover 20 is subjected to pressure or the expansion force of the battery 30, preventing the cover 20 from denting or deforming. Simultaneously, the reinforcing protrusion or reinforcing recess can be formed by stamping, thus improving the strength and rigidity of the cover 20 without increasing material usage, ensuring structural strength while achieving lightweight design. In this embodiment, the reinforcing structure 23 is a reinforcing recess located on the upper surface of the cover 20, and is arranged in an irregular strip-shaped groove pattern with interlocking connections.

[0048] The optional reinforcing protrusions and recesses can be linear, annular, interlaced grid, or other suitable geometries, as long as they satisfy the reinforcing effect of the cover 20.

[0049] It should be noted that the plurality in the above embodiments means at least two.

[0050] As Figure 1 shown, in some embodiments, a battery pack is also provided, comprising a battery 30, a vulnerable device 31 and the above-mentioned battery box, the battery 30 and the vulnerable device 31 are contained in the containing cavity of the battery box. The design of such a battery pack not only enhances the connection strength of the upper cover and the box, increases the anti-battery expansion ability of the whole pack, but also effectively improves the sealing performance of the battery box, protects the battery 30 from the influence of the external environment, improves the safety and service life of the battery 30, and at the same time removes the sealing structure and bolt fixing structure between the conventional cover 20 and the box body 10, simplifies the assembly structure and reduces the production cost. Among them, the vulnerable device 31 can be an internal electronic component of the battery pack such as a fuse.

[0051] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0052] 1. The sealing welding connection of the cover and the box body significantly improves the sealing performance and fixing strength of the battery box, effectively improves the tensile strength of the connection between the cover and the box body, and at the same time cancels the traditional bolt connection, simplifies the box structure, reduces the assembly parts, thereby reducing the production cost and assembly difficulty, and improving the production efficiency.

[0053] 2. The through hole and the detachable sealing cover on the cover make the battery-related components inside the battery pack can be quickly and conveniently inspected, repaired or replaced, reducing maintenance time and cost, and improving the maintenance efficiency and service life of the battery box.

[0054] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

[0055] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0056] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings are used only for distinguishing between similar objects and do not necessarily have to describe a specific sequential or chronological order. It is to be understood that the data so distinguished can be interchanged, under appropriate circumstances, such that the embodiments of the present application described herein can be practiced in other than the illustrated or described order.

[0057] The preferred embodiments of the present application are described above with the purpose of only illustrating rather than limiting the present application. The present application can be variously changed and altered by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery case characterized by comprising: The battery box comprises: a box body (10) having a receiving cavity for accommodating a battery (30) and a fragile device (31), and a mounting opening for mounting the battery (30) and the fragile device (31); a cover body (20) covering the mounting opening and shielding the mounting opening, the cover body (20) being sealingly welded to the box body (10), the cover body (20) having a through hole (24) communicating with the receiving cavity, and the fragile device (31) being exposed through the through hole (24); a sealing cover (40) detachably covering the through hole (24) and shielding the through hole (24).

2. The battery pack of claim 1, wherein, The box body (10) comprises a side beam (11), the cover body (20) has a connecting portion at a peripheral side edge, the connecting portion being lapped on the side beam (11), and the connecting portion and the side beam (11) being in surface abutment, and the cover body (20) being welded to the side beam (11) through the connecting portion.

3. The battery pack of claim 2, wherein, The connecting portion has a guide groove (25) formed along a thickness direction of the cover body (20) on a side away from the box body (10), and the guide groove (25) extends along a peripheral side of the cover body (20).

4. The battery pack of claim 2, wherein, The connecting portion has a plurality of positioning holes (26) for connecting with the box body (10), and the plurality of positioning holes (26) are arranged along the peripheral side of the cover body (20).

5. The battery pack of claim 4, wherein, The plurality of positioning holes (26) are two, and at least one of the positioning holes (26) extends along a length direction of the side beam (11) by a predetermined length for adjusting a mounting position of the cover body (20).

6. The battery pack of claim 1, wherein, The box body (10) comprises a side beam (11), and at least two opposite side edges of the cover body (20) have a flange (27) extending towards a direction close to the box body (10), and the flange (27) is in surface abutment with a surface of the side beam (11) away from the receiving cavity.

7. The battery pack of claim 1, wherein, The battery box further comprises a sealing member (50) arranged between the sealing cover (40) and the cover body (20) and surrounding a peripheral side of the through hole (24) to seal a gap between the sealing cover (40) and the cover body (20) when the sealing cover (40) is closed.

8. The battery pack of claim 7, wherein, A peripheral side edge of the through hole (24) has a first connecting structure (21), the sealing cover (40) has a second connecting structure (41), the first connecting structure (21) and the second connecting structure (41) are in abutment to connect the sealing cover (40) and the cover body (20), and the first connecting structure (21) is located outward of the sealing member (50) in a peripheral direction.

9. The battery pack of claim 7, wherein, The cover body (20) has a positioning groove (22) located at a peripheral side of the through hole (24), and at least a portion of the sealing member (50) is embedded in the positioning groove (22).

10. A battery pack, characterized by, A battery (30), a fragile device (31), and the battery case according to any one of claims 1 to 9 are housed in the housing cavity of the battery case.

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