Upper cover and battery pack

Abstract

The utility model provides an upper cover and a battery pack. The upper cover comprises a cover plate, a handle and a fastener, the handle extends in the first direction and comprises a lifting part and connecting parts, and the connecting parts are arranged on the two opposite sides of the lifting part in the first direction; the connecting part is provided with a first connecting hole; a flexible pull rope is arranged in the lifting part in a penetrating manner, and the end part of the flexible pull rope extends out of the lifting part to form a second connecting hole; the cover plate is provided with a third connecting hole, and the fastener penetrates through the first connecting hole, the second connecting hole and the third connecting hole so that the handle can be fixedly connected with the cover plate. When the upper cover is in a lifting state, the first connecting hole loses the restraining capacity on the fastener, the flexible pull rope can be immediately changed into a tensioning state from a loose state, and the second connecting hole replaces the first connecting hole to generate restraining force on the fastener, so that the phenomenon that the handle is separated from the cover plate to cause instant falling of the battery pack can be avoided, and the service life of the battery pack is prolonged. Meanwhile, response time can be provided for personnel, and personnel injury is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to an upper cover and a battery pack. Background Art

[0002] The power battery pack is the core component of electric vehicles, which determines the driving ability and endurance of electric vehicles. When the battery pack is almost exhausted, it is necessary to go to a charging station to charge or replace the battery pack. To facilitate the replacement of the battery pack, a handle is usually provided on the top cover of the battery pack for people to hold, so that people can lift and carry the battery pack.

[0003] However, the handle structure in the prior art is simple and lacks a safety protection structure. When the battery pack is frequently lifted or carried, the handle is easily broken, causing the battery pack to fall instantly and cause personal injury. Utility Model Content

[0004] In view of this, the utility model provides a top cover and a battery pack to at least solve the problem in the prior art that the battery pack handle lacks a safety protection structure, which easily causes the battery pack to fall instantly.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] The utility model provides an upper cover, comprising a cover plate, a handle and a fastener;

[0007] The handle is extended along a first direction, and comprises a lifting portion and a connecting portion, wherein the connecting portion is arranged at two opposite sides of the lifting portion along the first direction;

[0008] The connecting portion is provided with a first connecting hole; a flexible drawstring is passed through the pulling portion, and an end of the flexible drawstring extends out of the pulling portion to form a second connecting hole;

[0009] The cover plate is provided with a third connecting hole, and the fastener is passed through the first connecting hole, the second connecting hole and the third connecting hole to fix the handle to the cover plate.

[0010] Optionally, the first connection hole is a strip-shaped hole, the strip-shaped hole is extended along the first direction, and two ends of the strip-shaped hole along the first direction are arc-shaped structures.

[0011] Optionally, at least two nuts are provided in the third connecting hole, and the fastener is threadedly connected to the at least two nuts.

[0012] Optionally, the third connecting hole is a hexagonal blind hole, and at least two of the nuts are hexagonal nuts.

[0013] Optionally, the handle comprises a lifting block and a connecting piece, and the lifting block is fixedly connected to the connecting piece;

[0014] The lifting block forms the lifting portion, and opposite ends of the connecting piece along the first direction form the connecting portion.

[0015] Optionally, a connection cover is also included;

[0016] The connection cover is arranged on a side of the connection portion away from the cover plate, and a countersunk hole is arranged on the connection cover;

[0017] The fastener includes a head and a tail, the head is inserted into the countersunk hole, and the tail is inserted into the first connecting hole, the second connecting hole and the third connecting hole, so as to fix the connecting cover and the handle to the cover plate respectively.

[0018] Optionally, the connection cover has a side wall parallel to the axis direction of the fastener, the side wall is provided with a recessed portion, the cover plate is provided with a protruding portion, and the recessed portion and the protruding portion cooperate with each other.

[0019] Optionally, a gasket is also included;

[0020] The gasket is arranged between the connecting portion and the connecting cover, and a fourth connecting hole for the fastener to pass through is provided on the gasket.

[0021] Optionally, at least a portion of the countersunk hole and the fastener are jointly penetrated into the fourth connecting hole.

[0022] Optionally, a protective cover is also included;

[0023] The protective cover is fixedly connected to the cover plate, and the protective cover is used to cover the connection cover.

[0024] Optionally, the protective cover is a transparent cover.

[0025] Optionally, a plurality of reinforcing ribs are provided around the third connecting hole.

[0026] Optionally, a honeycomb reinforcement structure is provided on the cover plate.

[0027] The utility model also provides a battery pack, comprising a battery cell, a battery pack box and any one of the above-mentioned upper covers.

[0028] Compared with the prior art, the upper cover and battery pack described in the utility model have the following advantages:

[0029] In the upper cover of the utility model, the fastener is sequentially inserted through the first connection hole on the connecting part, the second connection hole at the end of the flexible drawstring and the third connection hole on the cover plate, so as to realize the fixed connection between the handle and the cover plate. Under normal circumstances, when the upper cover is in the lifting state, the flexible drawstring is in a relaxed state, and the second connection hole at the end of the flexible drawstring does not produce a restraining force on the fastener. The first connection hole on the connecting part and the third connection hole on the cover plate play a role of limiting and fixing the fastener, thereby ensuring the fixed connection between the handle and the cover plate. If the first connection hole on the connecting part of the upper cover fails due to fatigue in the lifting state and loses the restraining ability to the fastener, the flexible drawstring will immediately change from a relaxed state to a tensioned state, and the second connection hole at the end of the flexible drawstring replaces the first connection hole on the connecting part to produce a restraining force on the fastener, so that the second connection hole and the third connection hole play a role of limiting and fixing the fastener, thereby ensuring the fixed connection between the handle and the cover plate, thereby avoiding the phenomenon that the handle and the cover plate are separated and the battery pack falls instantly, and at the same time, it can provide reaction time for personnel, so that personnel can place the battery pack as soon as possible to avoid personal injury.

[0030] The battery pack of the present invention has the same or similar advantages as the prior art and the aforementioned upper cover, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0032] Figure 1 This is an exploded view of the structure of an upper cover in an embodiment of the utility model;

[0033] Figure 2 It is a schematic diagram of a handle in an embodiment of the utility model;

[0034] Figure 3 It is a schematic diagram of a connecting piece in an embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of a connection cover and a gasket in an embodiment of the utility model;

[0036] Figure 5 It is a cross-sectional schematic diagram of an upper cover in an embodiment of the utility model;

[0037] Figure 6 It is a schematic diagram of a cover plate in an embodiment of the utility model.

[0038] Description of reference numerals:

[0039] 1-cover plate, 11-third connecting hole, 12-reinforcement rib, 13-honeycomb reinforcement structure, 14-slot, 15-installation slot, 2-handle, 21-lifting part, 22-connecting part, 220-first connecting hole, 24-lifting block, 25-connecting plate, 3-flexible pull rope, 31-second connecting hole, 4-fastener, 41-head, 42-tail, 5-nut, 6-connecting cover, 61-countersunk hole, 62-side wall, 63-recessed part, 7-gasket, 71-fourth connecting hole, 8-protective cover, 81-buckle. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0042] It should be understood that the reference to "some embodiments" throughout the specification means that specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the utility model. Therefore, the "in some embodiments" appearing in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0043] The following describes in detail a top cover and a battery pack provided by the utility model by listing specific embodiments.

[0044] Reference Figure 1 and Figure 2The utility model provides an upper cover, comprising a cover plate 1, a handle 2 and a fastener 4; the handle 2 is extended and arranged along a first direction, and the handle 2 comprises a lifting portion 21 and a connecting portion 22, and the connecting portion 22 is arranged on two opposite sides of the lifting portion 21 along the first direction; the connecting portion 22 is provided with a first connecting hole 220; a flexible drawstring 3 is passed through the lifting portion 21, and the end of the flexible drawstring 3 extends out of the lifting portion 21 to form a second connecting hole 31; the cover plate 1 is provided with a third connecting hole 11, and the fastener 4 is passed through the first connecting hole 220, the second connecting hole 31 and the third connecting hole 11 to fix the handle 2 to the cover plate 1.

[0045] Specifically, the cover plate 1 is the main part of the upper cover, which is used to cover the battery pack box to form a complete battery pack. Figure 1 and Figure 2 As shown in the X direction in the figure, the handle 2 includes a lifting portion 21 and a connecting portion 22. The connecting portion 22 is arranged on opposite sides of the lifting portion 21 along the first direction. The lifting portion 21 is the portion for people to hold during the process of lifting or carrying the battery pack. The surface of the lifting portion 21 can be set to a rough surface, or the surface of the lifting portion 21 is provided with anti-slip structures such as protrusions to increase the friction when people hold the lifting portion 21 and prevent people's hands from slipping. The connecting portion 22 is provided with a first connecting hole 220, that is, there are two first connecting holes 220, and they are relatively arranged at the two ends of the handle 2 along the first direction. As shown in FIG. Figure 2 As shown, a flexible pull rope 3 is inserted into the lifting portion 21, and the end of the flexible pull rope 3 extends out of the lifting portion 21 and forms a second connection hole 31. There are also two second connection holes 31, which are relatively arranged at the two ends of the flexible pull rope 3 along the first direction. At least part of each second connection hole 31 is located within the corresponding first connection hole 220. It can be understood that the second connection hole 31 formed by the flexible pull rope 3 can be deformed to a certain extent. In some embodiments, the head and tail ends of the flexible pull rope 3 are connected to each other to form an annular flexible pull rope, and the two ends of the annular flexible pull rope extend out of the lifting portion 21 to form the second connection hole 31; in other embodiments, the flexible pull rope 3 is a rope body, and the head and tail ends of the rope body extend out of the lifting portion 21, and then the extended part is wound and connected to form the second connection hole 31. The cover plate 1 is provided with a third connecting hole 11, and there are also two third connecting holes 11, which are arranged along the first direction. There are also two fasteners 4, and the two fasteners 4 are respectively passed through the corresponding first connecting hole 220, the second connecting hole 31 and the third connecting hole 11, thereby realizing the fixed connection between the handle 2 and the cover plate 1. The fasteners 4 of this embodiment include but are not limited to bolts, screws, rivets, plastic clips and other structures, and the specific type is not limited in this embodiment.

[0046] In the case of normal use of the battery pack, when the upper cover is in the lifting state, the flexible drawstring 3 is in a relaxed state, and the second connection hole 31 at the end of the flexible drawstring 3 is in a relaxed state accordingly, and no constraint force is generated on the fastener 4. At this time, the first connection hole 220 on the connecting portion 22 and the third connection hole 11 on the cover plate 1 play a role of limiting and fixing the fastener 4, ensuring the fixed connection between the handle 2 and the cover plate 1. In the case of abuse of the battery pack, when the upper cover is in the lifting state, the flexible drawstring 3 is in a tensioned state, and the second connection hole 31 at the end of the flexible drawstring 3 is in a tensioned state accordingly, generating a constraint force on the fastener 4. At this time, the second connection hole 31 at the end of the flexible drawstring 3 and the third connection hole 11 on the cover plate 1 play a role of limiting and fixing the fastener 4, ensuring the fixed connection between the handle 2 and the cover plate 1. Among them, battery pack abuse mainly includes the following situations: First, the battery pack is frequently lifted or carried, causing the first connection hole 220 on the connection part 22 to be deformed, twisted, broken, etc., so that the first connection hole 220 cannot effectively cooperate with the fastener 4; Second, the battery pack handle 2 is used overweight, that is, it exceeds the strength range of the handle 2, causing the first connection hole 220 on the connection part 22 to be irreversibly deformed. Third, the battery pack handle 2 is used under abnormal lifting conditions, such as continuously holding one end of the handle 2 to lift, causing the first connection hole 220 on the connection part 22 to be irreversibly deformed. If the first connection hole 220 is deformed, twisted, broken, or irreversibly deformed, it is deemed that the first connection hole 220 is in a fatigue failure state. In this embodiment, the second connection hole 31 at the end of the flexible pull rope 3 can temporarily limit and fix the fastener 4 when the first connection hole 220 on the connecting portion 22 fails due to fatigue, thereby preventing the handle 2 from separating from the cover plate 1 and causing the battery pack to fall instantly. At the same time, when the flexible pull rope 3 changes from a relaxed state to a tensioned state, the person will feel the change in the force on the handle 2, thereby providing the person with reaction time and allowing the person to place the battery pack as soon as possible to avoid personal injury.

[0047] The flexible pull rope 3 can be made of any type of rope such as wire rope, heirloom rope, polyester rope, steel wire rope, etc. Preferably, the present embodiment uses galvanized steel wire rope. The galvanized steel wire rope has a smooth surface, is not prone to cracks, is not prone to rust, has good toughness and elasticity, has good tensile strength, and is not easily broken, thereby effectively improving the reliability of the limiting fixation of the fastener 4 through the second connecting hole 31 and the third connecting hole 11, thereby improving the reliability of the fixed connection between the handle 2 and the cover plate 1. In addition, the specifications of the flexible pull rope 3 can be reasonably selected according to the specifications of the battery pack. If the specifications of the battery pack are large, the pulling force required to be applied by the handle 2 to pull the battery pack is large, and the flexible pull rope 3 can be a thick flexible pull rope. If the specifications of the battery pack are small, the pulling force required to be applied by the handle 2 to pull the battery pack is small, and the flexible pull rope 3 can be a thin flexible pull rope. The cross-sectional diameter of the flexible pull rope 3 should not be less than 1 mm to ensure the deformation and pulling capabilities of the flexible pull rope 3. Preferably, the cross-sectional diameter of the galvanized steel wire rope in this embodiment is not less than 1.5 mm, which can meet the load-bearing capacity of approximately 20 kg and achieve the pulling requirements of most battery packs.

[0048] In the upper cover of the utility model, the fastener 4 is sequentially penetrated through the first connecting hole 220 on the connecting portion 22, the second connecting hole 31 at the end of the flexible pull rope 3 and the third connecting hole 11 on the cover plate 1, so as to realize the fixed connection between the handle 2 and the cover plate 1. Under normal circumstances, when the upper cover is in the pulling state, the flexible pull rope 3 is in a relaxed state, and the second connecting hole 31 at the end of the flexible pull rope 3 does not generate any restraining force on the fastener 4. The first connecting hole 220 on the connecting portion 22 and the third connecting hole 11 on the cover plate 1 play a role of limiting and fixing the fastener 4, thereby ensuring the fixed connection between the handle 2 and the cover plate 1. If the first connection hole 220 on the connecting part 22 of the upper cover fails due to fatigue when the upper cover is in the pulling state and loses its ability to restrain the fastener 4, the flexible pull rope 3 will immediately change from a relaxed state to a tensioned state, and the second connection hole 31 at the end of the flexible pull rope 3 replaces the first connection hole 220 on the connecting part 22 to exert a restraining force on the fastener 4, so that the second connection hole 31 and the third connection hole 11 play a role of limiting and fixing the fastener 4, ensuring the fixed connection between the handle 2 and the cover plate 1, thereby avoiding the phenomenon that the handle 2 is separated from the cover plate 1 and causing the battery pack to fall instantly, and at the same time providing reaction time for personnel to place the battery pack as soon as possible to avoid personal injury.

[0049] Optionally, refer to Figure 2 and Figure 3 The first connection hole 220 is a strip-shaped hole, the strip-shaped hole is extended along the first direction, and the two ends of the strip-shaped hole along the first direction are arc-shaped structures.

[0050] Specifically, the first connection hole 220 is a strip hole, which is arranged along the first direction. The strip hole can provide a certain deformation space for the fastener 4, and the two ends of the strip hole along the first direction are arc structures. The radius of the arc structure can be set according to the diameter of the fastener 4. In this embodiment, the diameter of the arc structure is set within the range of 6mm to 10mm to meet the connection requirements of most fasteners 4. At the same time, the length of the strip hole can be set within the range of 25mm to 35mm to meet the deformation requirements of the fastener 4. Of course, the connection part 22 of the handle 2 in this embodiment also needs to have a certain deformation ability to match the deformation of the first connection hole 220. When the handle 2 is in a state of no force, the fastener 4 can be located near the center of the strip hole. When the handle 2 is in a pulling state, the strip hole is deformed so that the fastener 4 is relatively closer to the edge of the strip hole. During the continuous pulling process, the edge of the strip hole abuts against the fastener 4, generating shear stress on the fastener 4. At the same time, the strip hole itself is slightly deformed by the reaction force of the fastener 4. If the pulling force is too large, it is easy to cause excessive deformation of the strip hole and fatigue failure.

[0051] Optionally, refer to Figure 1 and Figure 5 At least two nuts 5 are provided in the third connecting hole 11 , and the fastener 4 is threadedly connected to the at least two nuts 5 .

[0052] Specifically, in this embodiment, the fastener 4 is a bolt, and each third connecting hole 11 on the cover plate 1 is provided with at least two nuts 5, and at least two nuts 5 are stacked in the third connecting hole 11. The tail of each bolt is passed through the third connecting hole 11 and is threadedly connected to at least two nuts 5, so that the connection between the fastener 4 and the third connecting hole 11 is more stable and reliable, further ensuring the reliability of the connection between the handle 2 and the cover plate 1.

[0053] Optionally, the third connecting hole 11 is a hexagonal blind hole, and at least two of the nuts 5 are hexagonal nuts 5 .

[0054] Specifically, the third connecting hole 11 is a hexagonal blind hole, and correspondingly, at least two nuts 5 are hexagonal nuts 5, which are embedded in the hexagonal blind holes to limit the rotation between the two, thereby further improving the connection stability between the fastener 4 and the third connecting hole 11.

[0055] Optionally, refer to Figures 1 to 3 The handle 2 includes a lifting block 24 and a connecting piece 25, and the lifting block 24 is fixedly connected to the connecting piece 25; the lifting block 24 forms the lifting portion 21, and the connecting piece 25 forms the connecting portion 22 at opposite ends along the first direction.

[0056] Specifically, the handle 2 is composed of a lifting block 24 and a connecting piece 25. The lifting block 24 is fixedly connected to the connecting piece 25. The lifting block 24 forms a lifting portion 21, and the connecting piece 25 forms a connecting portion 22 at opposite ends along the first direction. The lifting block 24 is a portion for people to hold in the process of lifting or carrying the battery pack. The lifting block 24 is made of soft rubber materials such as rubber and silicone. It is light in weight, which helps the lightweight design of the upper cover. At the same time, the soft rubber material is more comfortable to hold and is not easy to hurt people's hands. The connecting piece 25 can be made of steel sheets, aluminum sheets and alloy sheets of other materials, etc., which have a certain strength and a certain deformation ability. The thickness of the connecting piece 25 can be set within the range of 0.6mm to 0.8mm. Since the lifting of the handle 2 needs to be within a certain range of elastic stiffness, when the thickness exceeds 0.8mm, the connecting piece 25 is too hard and difficult to bend, which in turn affects the comfort of people using the handle 2 when lifting and carrying the battery pack; if the thickness of the connecting piece 25 is too thin, that is, when the thickness is less than 0.6mm, the connecting piece 25 is very easy to deform, and the connecting piece 25 is prone to permanent deformation when the handle 2 is lifted. After the person finishes lifting and carrying the battery pack, the connecting piece 25 is not easy to return to its original state; therefore, in this embodiment, the thickness of the connecting piece 25 is set within the range of 0.6mm to 0.8mm to control the relative balance between the strength stiffness and deformation ability of the connecting piece 25. The flexible pull rope 3 is passed through the lifting block 24, and the head of the flexible pull rope 3 extends from the two ends of the lifting block 24 to form a second connecting hole 31. In actual application, the lifting block 24, the flexible pull rope 3 and the connecting piece 25 can be connected as an integral part through an injection molding process. The lifting block 24 is hot-melted at high temperature and then coated on the middle part of the flexible pull rope 3 and the connecting piece 25. The opposite ends of the connecting piece 25 along the first direction are not coated to form a connecting part 22. The first connecting hole 220 is arranged on the connecting part 22. The opposite ends of the flexible pull rope 3 along the first direction are also not coated and are freely located on the connecting part 22 to form a second connecting hole 31.

[0057] Optionally, refer to Figure 1 , Figure 4 and Figure 5 The upper cover also includes a connecting cover 6; the connecting cover 6 is arranged on the side of the connecting portion 22 away from the cover plate 1, and a countersunk hole 61 is provided on the connecting cover 6; the fastener 4 includes a head 41 and a tail 42, the head 41 is penetrated in the countersunk hole 61, and the tail 42 is penetrated in the first connecting hole 220, the second connecting hole 31 and the third connecting hole 11, so as to fix the connecting cover 6 and the handle 2 to the cover plate 1 respectively.

[0058] Specifically, if Figure 1 and 4As shown, the connection cover 6 is arranged on the side of the connection part 22 away from the cover plate 1. The connection cover 6 can be made of metal or alloy, has a certain structural rigidity, and is not easy to deform. A countersunk hole 61 is arranged on the connection cover 6. The fastener 4 is a bolt. The head 41 of the bolt is inserted into the countersunk hole 61, and the tail 42 of the bolt is inserted into the first connection hole 220 on the connection part 22, the second connection hole 31 at the end of the flexible pull rope 3 and the third connection hole 11 on the cover plate 1, so that the connection cover 6 and the handle 2 are respectively fixedly connected to the cover plate 1. The setting of the connection cover 6 can play a good fixing role on the head 41 of the fastener 4, further improve the connection reliability of the fastener 4, thereby ensuring the reliable connection between the handle 2 and the cover plate 1. At the same time, the connection cover 6 can also cover and protect the connection part 22 on the handle 2 to prevent the connection part 22 from being polluted by water vapor and dust, and the connection becomes loose.

[0059] Optionally, refer to Figure 4 The connecting cover 6 has a side wall 62 parallel to the axial direction of the fastener 4, the side wall 62 is provided with a recessed portion 63, and the cover plate 1 is provided with a protruding portion, and the recessed portion 63 cooperates with the protruding portion.

[0060] Specifically, if Figure 4 As shown, the connection cover 6 has a side wall 62 parallel to the axis direction of the fastener 4, and a recessed portion 63 is provided on the side wall 62. The number of the recessed portions 63 can be one, two or more, which is not limited in this embodiment. A protrusion is provided at the corresponding position on the cover plate 1, and the recessed portion 63 cooperates with the protrusion to achieve the limit of the connection cover 6 on the cover plate 1, avoiding the connection cover 6 from being offset, misaligned, etc., which helps to ensure the connection reliability of the fastener 4. At the same time, the recessed portion 63 cooperates with the protrusion to play a role in pre-positioning when the connection cover 6 is installed, and then it is not easy to cause the connection cover 6 to shake during the process of tightening the fastener 4.

[0061] Optionally, refer to Figure 1 , Figure 4 and Figure 5 The upper cover further includes a gasket 7 ; the gasket 7 is disposed between the connecting portion 22 and the connecting cover 6 , and the gasket 7 is provided with a fourth connecting hole 71 for the fastener 4 to pass through.

[0062] Specifically, if Figure 4 As shown, the gasket 7 is arranged between the connecting portion 22 and the connecting cover 6. Figure 5As shown, the gasket 7 is provided with a fourth connection hole 71 for the fastener 4 to pass through, the head of the fastener 4 is inserted into the countersunk hole 61 on the connection cover 6, and the tail of the fastener 4 is inserted into the fourth connection hole 71 on the gasket 7, the first connection hole 220 on the connection part 22, the second connection hole 31 at the end of the flexible drawstring 3 and the third connection hole 11 on the cover plate 1, so that the connection cover 6 and the handle 2 are respectively fixedly connected to the cover plate 1. The gasket 7 can be any form such as a circular gasket or a square gasket. One side of the gasket 7 abuts against the connection part 22, and the other side abuts against the connection cover 6, so as to achieve a seal between the connection cover 6 and the connection part 22, thereby achieving a waterproof and dustproof effect. At the same time, the gasket 7 can strengthen the limiting effect on the fastener 4, thereby reducing the probability that the first connection hole 220 is deformed when the handle 2 is pulled, causing the fastener 4 to loosen.

[0063] Optionally, refer to Figure 5 At least a portion of the counterbore 61 and the fastener 4 are disposed together in the fourth connecting hole 71 .

[0064] Specifically, the upper part of the countersunk hole 61 on the connecting cover 6 is a truncated cone-shaped structure, and the lower part of the countersunk hole 61 is a cylindrical structure. The diameter of the cylindrical structure is smaller than the diameter of the fourth connecting hole 71 on the gasket 7. The lower part of the countersunk hole 61 and the fastener 4 are jointly penetrated into the fourth connecting hole 71. Under this connection form, the countersunk hole 61 has a higher fit with the head of the fastener 4, thereby increasing the degree of outward deformation of the countersunk hole 61 in the pulling state, which makes it easier for personnel to observe and analyze the connection and fixation of the fastener 4.

[0065] Optionally, refer to Figure 1 and Figure 5 The upper cover also includes a protective cover 8; the protective cover 8 is fixedly connected to the cover plate 1, and the protective cover 8 is used to seal the connecting cover 6.

[0066] Specifically, the protective cover 8 is fixedly connected to the cover plate 1, and the forms of fixed connection include but are not limited to assembly connection, adhesive connection, snap-fit ​​connection, etc. Figure 1 As shown, the protective cover 8 is provided with a buckle 81, and the corresponding position of the cover plate 1 is provided with a slot 14, and the buckle 81 is clamped in the slot 14 to achieve a fixed connection between the protective cover 8 and the cover plate 1. The protective cover 8 is used to cover the connecting cover 6, thereby playing a secondary protection role for the connecting part 22 of the handle 2, and further improving the waterproof and dustproof effect of the connecting part 22. In some preferred embodiments, the cover plate 1 is provided with a mounting groove 15, and the fastener 4, the connecting cover 6, the gasket 7, the protective cover 8 and other structures are all installed in the mounting groove 15. After the protective cover 8 is installed, the surface is flush with the surface of the rest of the cover plate 1, so as to improve the overall aesthetics of the cover plate 1.

[0067] Optionally, the protective cover 8 is a transparent cover.

[0068] Specifically, the protective cover 8 is a transparent cover, and personnel can understand the deformation of the connecting cover 6 in real time through the protective cover 8, especially the deformation of the countersunk hole 61 on the connecting cover 6 and the connecting part 22 of the fastener 4. Personnel can conduct a preliminary inspection before lifting the battery pack to improve the safety of the battery pack.

[0069] Optionally, refer to Figure 6 A plurality of reinforcing ribs 12 are provided around the third connecting hole 11 .

[0070] Specifically, strip reinforcement ribs 12 are provided around the third connecting hole 11, and a plurality of strip reinforcement ribs 12 are evenly distributed around the third connecting hole 11 to enhance the structural strength and rigidity of the third connecting hole 11, and enhance the ability of the third connecting hole 11 to resist bending deformation, thereby ensuring the connection effect between the fastener 4 and the third connecting hole 11.

[0071] Optionally, a honeycomb reinforcement structure 13 is provided on the cover plate 1 .

[0072] Specifically, a honeycomb reinforcement structure 13 is provided on the cover plate 1 to enhance the strength and stiffness of the cover plate 1 and prevent the force exerted by the handle 2 on the cover plate 1 from causing local deformation of the cover plate 1. When the cover plate 1 has high structural stability, it is not easy to cause loosening of the connection portion 22 between the handle 2 and the cover plate 1, thereby ensuring a reliable connection of the handle 2.

[0073] The utility model also provides a battery pack, comprising a battery cell, a battery pack box and any of the above-mentioned upper covers.

[0074] Specifically, the battery pack includes a battery cell, a battery pack case and an upper cover. The battery pack case has a accommodating cavity. There are multiple battery cells, which are placed in order in the accommodating cavity of the battery pack case. The upper cover is assembled and connected to the battery pack case. The upper cover is used to seal the accommodating cavity to achieve sealing, waterproof and dustproof effects on the battery pack, and protect the multiple battery cells in the accommodating cavity.

[0075] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cover, characterized in that: Includes covers, handles and fasteners; The handle is extended along a first direction, and comprises a lifting portion and a connecting portion, wherein the connecting portion is arranged at two opposite sides of the lifting portion along the first direction; The connecting portion is provided with a first connecting hole; a flexible drawstring is passed through the pulling portion, and an end of the flexible drawstring extends out of the pulling portion to form a second connecting hole; The cover plate is provided with a third connecting hole, and the fastener is passed through the first connecting hole, the second connecting hole and the third connecting hole to fix the handle to the cover plate.

2. The upper cover according to claim 1, characterized in that: The first connection hole is a strip-shaped hole, the strip-shaped hole is extended along the first direction, and two ends of the strip-shaped hole along the first direction are arc-shaped structures.

3. The upper cover according to claim 1, characterized in that: At least two nuts are arranged in the third connecting hole, and the fastener is threadedly connected to the at least two nuts.

4. The upper cover according to claim 3, characterized in that: The third connecting hole is a hexagonal blind hole, and at least two of the nuts are hexagonal nuts.

5. The upper cover according to claim 1, characterized in that: The handle includes a lifting block and a connecting piece, and the lifting block is fixedly connected to the connecting piece; The lifting block forms the lifting portion, and opposite ends of the connecting piece along the first direction form the connecting portion.

6. The upper cover according to claim 1, characterized in that: Also included is a connection cover; The connection cover is arranged on a side of the connection portion away from the cover plate, and a countersunk hole is arranged on the connection cover; The fastener includes a head and a tail, the head is inserted into the countersunk hole, and the tail is inserted into the first connecting hole, the second connecting hole and the third connecting hole, so as to fix the connecting cover and the handle to the cover plate respectively.

7. The upper cover according to claim 6, characterized in that: The connection cover has a side wall parallel to the axis of the fastener, the side wall is provided with a recessed portion, the cover plate is provided with a protruding portion, and the recessed portion and the protruding portion cooperate with each other.

8. The upper cover according to claim 6, characterized in that: Also includes spacers; The gasket is arranged between the connecting portion and the connecting cover, and a fourth connecting hole for the fastener to pass through is provided on the gasket.

9. The upper cover according to claim 8, characterized in that: At least a portion of the counterbore and the fastener are disposed together in the fourth connecting hole.

10. The upper cover according to claim 6, characterized in that: Also includes a protective cover; The protective cover is fixedly connected to the cover plate, and the protective cover is used to cover the connection cover.

11. The upper cover according to claim 10, characterized in that: The protective cover is a transparent cover.

12. The upper cover according to claim 1, characterized in that: A plurality of reinforcing ribs are arranged around the third connecting hole.

13. The upper cover according to claim 1, characterized in that: The cover plate is provided with a honeycomb reinforcement structure.

14. A battery pack, characterized in that: It comprises a battery cell, a battery pack body and the upper cover according to any one of claims 1 to 13.

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