CN218274936U - Box components of battery packs and battery packs - Google Patents

Abstract

The present application discloses a box assembly of a battery pack and a battery pack. The box assembly of the battery pack includes: a box body, the box body defines an accommodating chamber with an opening for accommodating battery cells; The box body is used to close the opening, and the cover body is provided with a detachable clamping structure, which is clamped and connected with the edge of the opening. By providing a detachable clamping structure on the cover, the cover can be detachably fixed on the box by using the clamping structure. Compared with the fixing method using screws in the related art, it saves the need for rotation, tightening and rotation. The step of loosening simplifies the assembly and disassembly steps. Compared with the method of fixing with pre-glued self-tapping rivets, it not only simplifies the installation steps, but also after the clamping structure is fixed, it is easy to dismantle and maintain, and no glue is required , and there is no need to configure additional riveting equipment or tightening systems, which can save the corresponding design and equipment cost investment, which is conducive to reducing costs.

Description

Battery pack box assembly and battery pack

technical field

The present application relates to the technical field of batteries, in particular to a case assembly of a battery pack and the battery pack.

Background technique

The battery case upper cover and the battery case frame in the related art are fixed by self-tapping rivets. The self-tapping rivet has a head, a threaded part and a tail part. The threaded part has a sealant area. The self-tapping rivet passes through the battery case upper cover and The upper cover of the battery box is locked and connected to the frame of the battery box, and the frame of the battery box is sealed with the area of the sealant.

However, the installation steps of self-tapping rivets are complicated, and glue needs to be pre-applied when installing self-tapping rivets, resulting in an increase in cost. After the self-tapping rivets are fixed, it is difficult to remove and repair, which makes battery maintenance difficult.

Utility model content

In view of the above problems, the present application provides a box assembly of a battery pack, which can simplify installation steps, be easy to disassemble, facilitate maintenance, and help reduce costs.

The present application also proposes a battery pack having the above battery pack case assembly.

In a first aspect, the present application provides a box assembly of a battery pack, including: a box body, the box body defines an accommodating cavity with an opening for accommodating batteries; a cover body, the cover body is arranged on the The box body is used to close the opening, and the cover body is provided with a detachable clamping structure, and the clamping structure is clamped and connected with the edge of the opening.

In the technical solution of the embodiment of the present application, by providing a detachable clamping structure on the cover body, the cover body can be detachably fixed on the box body by using the clamping structure, which is similar to the fixing method using screws in the related art. Compared with the steps of rotating tightening and rotating loosening, the assembly and disassembly steps are simplified. Compared with the method of fixing with pre-glued self-tapping rivets, it not only simplifies the installation steps, but also after the clamping structure is fixed, it is easy to It is easy to disassemble and repair, and there is no need to apply glue, and there is no need to configure additional riveting equipment or tightening systems, which can save the corresponding design and equipment costs, and help reduce costs.

In some embodiments, a locking hole is provided on the edge of the opening, and the locking structure is engaged with the locking hole. By setting the clamping hole, it is convenient for the clamping structure to cooperate with the box body, the structure is simple, the processing and manufacture are easy, and it is beneficial to improve the assembly and disassembly efficiency of the cover body and the box body.

In some embodiments, the clamping holes and the clamping structures respectively include a plurality, and the multiple clamping structures are connected to the multiple clamping holes in a one-to-one correspondence. By providing multiple clamping holes and multiple clamping structures, it is beneficial to improve the connection reliability between the cover body and the box body.

In some embodiments, a plurality of the clamping holes are arranged at intervals along the circumference of the opening, and the cover and the box can be fixed together from the circumference of the opening, further improving the connection reliability between the cover and the box.

In some embodiments, the cover is provided with a mounting hole corresponding to the position of the locking hole, and the locking structure is detachably disposed at the mounting hole. The clamping structure can pass through the mounting hole from the top of the cover to engage with the clamping hole on the box below the cover, and it is also convenient to remove the clamping structure from above the cover, so that the cover can be removed from the box remove it.

In some embodiments, the clamping structure includes: a limiting head; a plurality of clamping pieces arranged at intervals along a circumferential direction, each of the clamping pieces is connected to the limiting head connection; wherein, the limit head is located on the side of the cover body facing away from the box body, and the clamping piece is passed through the mounting hole and the clamping hole so that the clamping piece is connected with the The clamping holes are snap fit. In this way, a plurality of snap-connecting parts of the snap-fit structure can be snap-fitted with the snap-holes to further ensure the reliability of the connection between the snap-fit structure and the box body, thereby ensuring the reliability of fixing the cover on the box body.

In some embodiments, the clamping member is a rod-shaped structure, one end of the clamping member is connected to the limit head, and the other end of the clamping member is engaged with the clamping hole. Manual and fast installation can be realized, which simplifies the installation steps.

In some embodiments, the clamping piece includes: a connecting rod, one end of the connecting rod has a connecting part, and the connecting part is connected to the limit head, and the thickness direction of the connecting part and the connecting rod Extending radially along the circumference; a hook, the hook is connected to the other end of the connecting rod, and the hook is engaged with the locking hole. When installing the clamping structure, the connecting rod and the hook are inserted into the corresponding mounting hole and the clamping hole together, so that the clamping hook can be clamped into the clamping position of the clamping hole, realizing manual and quick installation, and simplifying the installation steps.

In some embodiments, the connecting portion has a thickness smaller than that of the connecting rod. In this way, it is easy to break between the limiting head and the clamping member, so that the clamping structure can be easily removed, and the maintenance of the battery pack is more convenient and the maintenance cost is lower.

In some embodiments, the thickness of the connecting portion gradually decreases from the connecting rod to the limiting head. By limiting the thickness of the connection part to meet the above conditions, the connection between the connection part and the limit head is easy to break, so that the clamping structure can be easily removed, and the maintenance of the battery pack is more convenient and the maintenance cost is lower.

In some embodiments, a side of the connecting portion away from the center of the limiting head has a chamfered surface, and the chamfered surface is from the connecting rod to the limiting head toward the center of the limiting head direction extension. In this way, a slot can be formed between the beveled surface and the limit head, and the setting of the beveled surface can facilitate the operator to insert the tool into the slot, so that the operator can use the tool to pry the limit head, and finally remove the clamping structure to realize the cover Separation of body and box.

In some embodiments, the locking hole is a through hole. In this way, the clamping structure can pass through the installation hole and the clamping hole, and cooperate with the lower surface of the clamping hole, so that the cover is fixed on the box body by the clamping structure, ensuring the reliability of the connection between the cover body and the box body.

In some embodiments, the clamping hole is a blind hole. It can prevent abnormal sound problems or damage to the battery cell due to part of the clamping structure falling into the box when the clamping structure is removed.

In some embodiments, the clamping hole includes a first hole portion and a second hole portion communicated with each other, and the first hole portion is located between the installation hole and the second hole portion; wherein, the first hole portion is located between the installation hole and the second hole portion; The size of a hole is smaller than the size of the second hole so as to form a limiting surface between the first hole and the second hole. extending to the second hole to cooperate with the limiting surface. The clamping structure is clamped between the first hole and the second hole, which can not only ensure the installation reliability of the clamping structure, thereby ensuring the fixing reliability of the cover and the box, but also prevent the clamping structure from Part of the structure falls into the box, causing abnormal noise or damaging the battery cell.

In some embodiments, the locking structure is an integral molding. Such an arrangement omits the connection structure, which is beneficial to improving the structural strength of the clamping structure and avoiding damage or breakage of local parts of the clamping structure.

In some embodiments, the locking structure is a plastic part. It is easy to process and manufacture, and the cost is low.

In some embodiments, the side wall of the box has a mounting flange extending toward the accommodating cavity, the mounting flange defines the opening, and the snap-fitting structure snaps into the mounting flange connected. The mounting flange provides a mounting carrier for the card hole, so that it is convenient to fix the cover on the box body; it can reduce the size of the box assembly in the width direction and/or length direction, and can also reduce the height direction of the box assembly size, thereby reducing the battery pack footprint.

In some embodiments, a sealing member is further included, the sealing member is arranged between the box body and the cover body, and the locking structure passes through the sealing member. The gap between the box body and the cover body can be sealed by using the sealing member, so as to ensure the tightness of the connection between the box body and the cover body.

In a second aspect, the present application provides a battery pack, including the case assembly of the battery pack described in the above embodiments.

In the technical solutions of the embodiments of the present application, by adopting the box assembly of the battery pack of the above embodiments, it is beneficial to simplify assembly and disassembly steps, facilitate maintenance, and reduce costs.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

FIG. 1 is a perspective view of a battery pack according to some embodiments of the present application;

2 is a front view of a battery pack according to some embodiments of the present application;

Fig. 3 is a structural sectional view along line A-A in Fig. 2;

Fig. 4 is a partially enlarged view of the battery pack shown in Fig. 3;

Fig. 5 is a perspective view of the clamping structure of the box assembly of the battery pack;

Fig. 6 is a front view of the clamping structure of the box assembly of the battery pack;

Fig. 7 is a structural sectional view along line B-B in Fig. 6 .

Reference signs:

Battery pack 100, box assembly 10, box body 11, accommodating chamber 111, opening 112, bottom wall 113, side wall 114, mounting flange 115, clamping hole 116, first hole 1161, second hole 1162, limit Bit surface 1163, cover body 12, mounting hole 121, sealing member 13, clamping structure 20, limit head 21, clamping member 22, connecting rod 221, hook 222, connecting part 23, beveled surface 231, battery cell 30 .

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are the Claim some of the examples, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field of this application; the terms used in this application in the description of the application are only to describe specific implementations The purpose of the example is not intended to limit the present application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and the description of the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, rather than to describe a specific sequence or primary-subordinate relationship.

Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection", "connection" and "attachment" should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The term "and/or" in this application is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which may mean: A exists alone, A and B exist simultaneously, and A and B exist alone. There are three cases of B. In addition, the character "/" in this application generally indicates that the contextual objects are an "or" relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are for illustrative purposes only, and should not constitute any limitation to the application .

As the carrier of the battery cells of the battery module, the box assembly of the battery pack plays a key role in the safe operation and protection of the battery cells. The box assembly of the battery pack not only needs to be dustproof and waterproof to avoid dust and water The battery cells, electrical components, control system circuit boards, etc. inside the battery pack are affected, and it needs to have vibration resistance and impact resistance. After the test, there should be no mechanical damage, deformation and loosening of the fastening parts. It also needs to have Ease of maintenance.

The related art discloses a battery case, which includes a battery case upper cover and a battery case frame. The battery case upper cover and the battery case frame are fixed by self-tapping rivets. There is a sealant area, the self-tapping rivet passes through the upper cover of the battery box and locks and connects the upper cover of the battery box to the battery box frame, and the battery box frame and the sealant area form a seal.

However, the head and tail of the self-tapping rivet occupy the space in the height direction of the battery box, resulting in an increase in the height of the battery, and the self-tapping rivet needs to be pre-coated with glue during installation, resulting in an increase in cost. In addition, after the self-tapping rivet is fixed, It is difficult to disassemble and difficult to repair, making the battery difficult to maintain.

In view of this, the embodiment of the present application provides a method of fixing the case and cover of the battery pack with a detachable snap-in structure, which not only simplifies the installation steps, but also facilitates removal and maintenance after the snap-in structure is fixed. There is no need to apply glue, which is beneficial to reduce costs.

The box assembly 10 of the battery pack according to the embodiment of the present application will be described below with reference to FIGS. 1-7 .

As shown in FIGS. 1-3 , the case assembly 10 of the battery pack according to the embodiment of the present application includes a case body 11 and a cover body 12. The case body 11 defines a housing cavity 111 for accommodating the battery cells 30 and accommodating The cavity 111 has an opening 112 , so the operator can take the discharge core 30 from the opening 112 , and the cover 12 is provided on the box body 11 , and the cover 12 can close the opening 112 .

Wherein, the cover body 12 is provided with a detachable clamping structure 20 , and the clamping structure 20 is clamped and connected with the edge of the opening 112 , so that the cover body 12 can be fixed on the box body 11 .

In the technical solution of the embodiment of the present application, by providing a detachable snap-in structure 20 on the cover 12, the cover 12 can be detachably fixed on the box body 11 by using the snap-in structure 20, which is different from the use of screws in the related art. Compared with the fixing method, the steps of rotating tightening and rotating loosening are omitted, thereby simplifying the assembly and disassembly steps. Compared with the fixing method using pre-glued self-tapping rivets, it not only simplifies the installation steps, but also snaps After the structure 20 is fixed, it is easy to dismantle and maintain, and there is no need to apply glue, and no additional riveting equipment or tightening system is required, which can save the investment in corresponding design and equipment costs, and is conducive to reducing costs.

As shown in FIG. 3 and FIG. 4 , in some embodiments, a locking hole 116 is provided on the edge of the opening 112 , and the locking structure 20 is engaged with the locking hole 116 .

By setting the clamping hole 116 at the edge of the opening 112, it is convenient for the clamping structure 20 to cooperate with the box body 11, so that the cover body 12 can close the opening 112 of the box body 11, and the relative sealing inside the box body assembly 10 is realized, and the structure is simple. It is easy to process and manufacture, and it is beneficial to improve the assembly and disassembly efficiency of the cover body 12 and the box body 11 .

Specifically, when the cover body 12 needs to be fixed on the box body 11, the snap-in structure 20 can be fixed on the cover body 12, and at least a part of the snap-in structure 20 can be inserted into the snap-in hole 116, thereby using the snap-in structure 20 to The cover body 12 is fixed on the box body 11; when the cover body 12 needs to be disassembled from the box body 11, the clamping structure 20 can be removed from the cover body 12, so that the clamping structure 20 is disengaged from the clamping hole 116 , so that the cover body 12 can be disassembled from the box body 11 .

In some embodiments, the clamping holes 116 and the clamping structures 20 respectively include a plurality, and the multiple clamping structures 20 are connected to the multiple clamping holes 116 in one-to-one correspondence. By providing multiple clamping holes 116 and multiple clamping structures 20 , it is beneficial to improve the connection reliability between the cover body 12 and the box body 11 .

In some embodiments, a plurality of locking holes 116 are arranged at intervals along the circumference of the opening 112 . After the installation of the plurality of locking structures 20, the plurality of locking structures 20 are arranged at intervals along the circumferential direction of the opening 112, so that the cover body 12 and the box body 11 can be fixed together from the circumferential direction of the opening 112, and the connection between the cover body 12 and the box body 11 can be further improved. The connection reliability of the box body 11 ensures the tightness inside the box body assembly 10 .

As shown in Figures 1 and 2, in this embodiment, the box assembly 10 of the battery pack 100 can form a rectangular parallelepiped, the cover 12 forms a rectangular plate, the length direction of the cover 12 extends along the front-to-back direction, and the cover 12 The width direction extends along the left-right direction, a part of the plurality of engaging structures 20 is arranged at intervals along the length direction of the cover body 12 , and another part of the plurality of engaging structures 20 is arranged at intervals along the width direction of the cover body 12 .

As shown in FIG. 3 and FIG. 4 , in some embodiments, the cover body 12 is provided with a mounting hole 121 corresponding to the position of the locking hole 116 , and the locking structure 20 is detachably disposed at the mounting hole 121 .

Thus, by providing the mounting hole 121 on the cover body 12, it is not only convenient to fix the clipping structure 20 on the cover body 12 from above the cover body 12, but also the clipping structure 20 can pass through the mounting hole 121 to be in contact with the cover body 12. The clamping hole 116 on the box body 11 below the body 12 is clamped and matched, and the clamping structure 20 is conveniently removed from the top of the cover body 12, so that the cover body 12 can be disassembled from the box body 11.

As shown in FIG. 4 , in some embodiments, the clamping structure 20 includes a limiting head 21 and a plurality of clamping pieces 22, and the multiple clamping pieces 22 are arranged at intervals along a circumferential direction, and each clamping piece 22 is connected to the limiter. The position head 21 is connected, and the limit head 21 is located on the side of the cover body 12 facing away from the box body 11. The snap-in piece 22 is pierced through the mounting hole 121 and the snap-in hole 116, so that the snap-in block 22 can be snapped into the snap-in hole 116 Then cooperate.

"Multiple" in this application refers to two or more (including two). In the embodiment where the clamping structure 20 includes a limit head 21 and two clamping pieces 22, the two clamping pieces 22 can be arranged oppositely, for example, the two clamping pieces 22 can be arranged in the left-right direction shown in FIG. 4 relative settings.

In this way, a plurality of clamping parts 22 of the clamping structure 20 can be clamped and matched with the clamping hole 116 to further ensure the reliability of the connection between the clamping structure 20 and the box body 11, thereby ensuring that the cover 12 is reliably fixed on the box body 11 To ensure the tightness inside the box assembly 10.

In some embodiments, the clamping member 22 is a rod-shaped structure, one end of the clamping member 22 is connected to the limit head 21 , and the other end of the clamping member 22 is engaged with the clamping hole 116 .

That is to say, one end of the clamping piece 22 is connected with the limit head 21 to form a fixed end, and the other end of the clamping piece 22 is adapted to snap fit with the clamping hole 116 to form a free end. When the other end of the clamping piece 22 Under force, the clip 22 may be deformed.

When installing the clamping structure 20, multiple clamping pieces 22 can be inserted into the corresponding mounting holes 121 and clamping holes 116. Bending, when moving to the clamping position of the clamping hole 116, a plurality of clamping parts 22 move away from the center position of the limit head 21, thereby clamping into the clamping position of the clamping hole 116, and realizing the clamping structure 20 and the box body 11 connections. Compared with the way of fixing with screws and the way of fixing with pre-glued self-tapping rivets in the related art, manual and fast installation can be realized, and the installation steps are simplified.

5-7, in some embodiments, the clip 22 includes a connecting rod 221 and a hook 222, one end of the connecting rod 221 has a connecting portion 23, the connecting portion 23 is connected to the limit head 21, and the connecting portion 23 and the thickness direction of the connecting rod 221 extend along the radial direction of the circumference, the hook 222 is connected with the other end of the connecting rod 221 , and the hook 222 is engaged with the locking hole 116 .

When installing the locking structure 20, a plurality of connecting rods 221 and a plurality of hooks 222 are inserted into the corresponding mounting holes 121 and the locking holes 116 together, so that the plurality of locking hooks 222 can be locked into the locking positions of the locking holes 116, realizing Manual and quick installation, simplifying the installation steps.

In the embodiment where the clamping structure 20 includes a limit head 21 and two clamping pieces 22, the connecting rods 221 of the two clamping pieces 22 respectively extend in the up and down direction, and the two connecting rods 221 are opposite and arranged at intervals. The hooks 222 of each engaging member 22 are respectively connected to the lower ends of the corresponding connecting rods 221 , and the two hooks 222 are arranged on opposite sides of the two connecting rods 221 .

As shown in FIG. 4 and FIG. 7 , in some embodiments, the thickness of the connecting portion 23 (the dimension of the connecting portion 23 in the left-right direction as shown in FIG. 4 ) is smaller than the thickness of the connecting rod 221 .

That is to say, the connection portion 23 of the clip 22 , or the connection portion between the connection portion 23 and the limit head 21 , or the connection portion between the connection portion 23 and the connecting rod 221 is relatively weak and prone to breakage. In this way, the space between the limiting head 21 and the clamping member 22 is easy to break, so that the clamping structure 20 can be easily removed, and the maintenance of the battery pack 100 is more convenient and the maintenance cost is lower.

When the battery pack 100 needs to be maintained, a tool can be used to pry the limit head 21, so that the connection portion 23 of at least one clip 22, or the connection between the connection portion 23 and the limit head 21, or the connection portion 23 and The joint of the connecting rod 221 breaks, and then the clamping structure 20 can be removed to realize the separation of the cover 12 and the box body 11, and the operation is simple; after the maintenance is completed, the cover 12 needs to be reinstalled on the box body 11 , can replace the new clamping structure 20, and use the new clamping structure 20 to fix the cover 12 to the box body 11, and the maintenance process is easy to operate and low in cost.

As shown in FIG. 7 , in some embodiments, the thickness of the connecting portion 23 gradually decreases from the connecting rod 221 to the limiting head 21 .

That is to say, the thickness of the joint between the connecting portion 23 and the limiting head 21 is the smallest, that is, the connecting portion between the connecting portion 23 and the limiting head 21 is relatively weak. When the cover 12 needs to be opened, a tool can be used to pry the limiting head 21. In this way, the joint between the connecting portion 23 of at least one clamping member 22 and the limit head 21 is broken, and then the clamping structure 20 can be removed to realize the separation of the cover 12 and the box 11.

Therefore, by limiting the thickness of the connecting portion 23 to meet the above conditions, the connection between the connecting portion 23 and the limit head 21 is easy to break, thereby facilitating the removal of the clamping structure 20, making the maintenance of the battery pack 100 more convenient, and the maintenance cost is lower. Low.

As shown in FIG. 7 , in some embodiments, the side of the connecting portion 23 away from the center of the limit head 21 has a beveled surface 231 , and the beveled surface 231 is from the connecting rod 221 to the limit head 21 toward the side close to the limit head 21 Extend in the direction of the center.

In this way, a slot can be formed between the beveled surface 231 and the limit head 21, and the setting of the beveled surface 231 can facilitate the operator to insert the tool into the slot, so that the operator can use the tool to pry the limit head 21, and finally remove the clip joint. The structure 20 realizes the separation of the cover body 12 and the box body 11 .

In some embodiments, the outer surface of the limiting head 21 has marks (not shown in the figure). By arranging marks on the outer surface of the limit head 21 , it is beneficial to improve the assembly and disassembly efficiency of the clamping structure 20 , thereby improving the assembly, disassembly and maintenance efficiency of the battery pack 100 .

For example, the direction of prying can be marked on the outer surface of the limit head 21, so as to facilitate the operator to pry the limit head 21 along the marked direction, so that the limit head 21 is separated from at least one clip 22, so that the clip can be removed. Structure 20.

For another example, the outer surface of the limiting head 21 can be coated with a color that is quite different from the color of the cover body 12, so that it can be identified whether there is a missing installation problem through manual visual inspection or a CCD visual inspection system.

In some embodiments, the locking hole 116 is a through hole.

Thus, by setting the clamping hole 116 as a through hole, the clamping structure 20 can pass through the installation hole 121 and the clamping hole 116, and cooperate with the lower surface of the clamping hole 116, so that the cover 12 can be fixed by the clamping structure 20 On the box body 11 , the connection reliability between the cover body 12 and the box body 11 is ensured.

In addition, even if the hook 222 of the snap-in structure 20 passes through the snap hole 116, on the basis of ensuring a reliable connection, the structural size of the hook 222 can be made very small, so that the hook 222 in the height direction of the box body 11 The occupied space is small, which is beneficial to increase the effective volume in the accommodation cavity 111 , thereby increasing the energy density of the battery pack 100 .

As shown in FIG. 3 and FIG. 4 , in some embodiments, the locking hole 116 is a blind hole.

By setting the clamping hole 116 as a blind hole, it is prevented that part of the clamping structure 20 falls into the box body 11 when the clamping structure 20 is removed, and the clamping structure 20 is prevented from falling on the bottom wall 113 of the box body 11, or, Falling into between the side wall 114 of the box 11 and the battery cell 30 , or falling into the gap between two adjacent battery cells 30 , causing abnormal noise, or preventing the snap-in structure 20 from damaging the battery cell 30 .

In addition, the fixing of the clamping structure 20 only occupies part of the space of the clamping hole 116 in the height direction of the box body 11 , which is beneficial to increase the effective volume in the receiving chamber 111 , thereby increasing the energy density of the battery pack 100 . Since the clamping hole 116 is a blind hole and does not communicate with the accommodating cavity 111 , it is more beneficial to ensure the sealing of the box assembly 10 .

In some embodiments, the locking hole 116 includes a first hole portion 1161 and a second hole portion 1162, the first hole portion 1161 and the second hole portion 1162 communicate with each other, the first hole portion 1161 is located between the installation hole 121 and the second hole portion 1162, the size of the first hole 1161 is smaller than the size of the second hole 1162, so that a limiting surface 1163 can be formed between the first hole 1161 and the second hole 1162, and the clip 22 is suitable for moving from the second hole 1162 A hole portion 1161 extends to the second hole portion 1162 to cooperate with the limiting surface 1163 .

Specifically, as shown in FIG. 4, the first hole 1161 is located above the second hole 1162, and the lower end of the first hole 1161 communicates with the upper end of the second hole 1162, and the lower end of the first hole 1161 communicates with the second hole. A limiting surface 1163 is formed between the upper ends of the two hole portions 1162. When the cover body 12 is mounted on the box body 11, the lower end of the engaging structure 20 passes through the installation hole 121, the first hole portion 1161 and the second hole portion in sequence. 1162 , so as to snap fit with the limiting surface 1163 to realize the fixed connection between the cover body 12 and the box body 11 .

Therefore, by setting the locking hole 116 to include the first hole 1161 and the second hole 1162, so that the locking structure 20 is locked between the first hole 1161 and the second hole 1162, it is possible Ensure the installation reliability of the snap-in structure 20, thereby ensuring the fixing reliability of the cover 12 and the box body 11, and prevent part of the snap-in structure 20 from falling into the box body 11, preventing the snap-in structure 20 from falling into the box body 11 and the battery cell 30 to cause abnormal noise, or to prevent the snap-in structure 20 from damaging the battery cell 30 .

In some embodiments, the clamping structure 20 is an integrally formed part, eliminating the connecting structure, which is beneficial to improving the structural strength of the clamping structure 20 and avoiding damage or breakage of local parts of the clamping structure 20 .

In some embodiments, the locking structure 20 is a plastic part. For example, the locking structure 20 can be processed by injection molding, which is easy to process and manufacture, and has low cost.

As shown in FIGS. 3 and 4 , in some embodiments, the side wall 114 of the box body 11 has an installation flange 115 extending toward the interior of the housing cavity 111, that is, the side wall 114 of the box body 11 is provided with an inner flange, and the installation The flange 115 defines an opening 112 , and the clamping structure 20 is clamped and connected to the mounting flange 115 .

In the embodiment where the side wall 114 of the box body 11 has a clamping hole 116 , the clamping hole 116 is provided on the mounting flange 115 . By setting the mounting flange 115 on the side wall 114 of the box body 11 , a mounting carrier is provided for the clamping hole 116 , so as to facilitate fixing the cover body 12 on the box body 11 .

In addition, compared with the technical solution of setting the outer flange on the side wall 114 of the box body 11, the present application arranges the installation flange 115 (inner flange) on the side wall 114 of the box body 11 to reduce the occupation of the battery pack 100. On the basis of a certain space, the size of the accommodation chamber 111 in the width direction and/or length direction can be increased, thereby increasing the volume of the accommodation chamber 111, thereby improving the energy density of the battery pack 100; when the volume of the accommodation chamber 111 is constant Basically, the size of the box assembly 10 in the width direction and/or the length direction can be reduced, the occupied space of the battery pack 100 can be reduced, and the structural miniaturization design of the battery pack 100 can be realized.

Moreover, compared with the method of using screws or self-tapping rivets, the use of the snap-in structure 20 to fix the cover 12 on the mounting flange 115 reduces the need for the snap-in structure 20 on the basis that the battery pack 100 occupies a certain space. The occupied space in the height direction of the box assembly 10 can increase the height and volume of the accommodating chamber 111, and further increase the energy density of the battery pack 100; on the basis of a certain volume of the accommodating chamber 111, the box assembly can be reduced 10 in the height direction reduces the occupied space of the battery pack 100 and realizes the structure miniaturization design of the battery pack 100 .

As shown in FIG. 4 , in some embodiments, the case body assembly 10 of the battery pack further includes a sealing member 13 disposed between the case body 11 and the cover body 12 , and the locking structure 20 passes through the sealing member 13 . By providing the sealing member 13 , the gap between the box body 11 and the cover body 12 can be sealed by using the sealing member 13 , so as to ensure the tightness of the connection between the box body 11 and the cover body 12 .

Wherein, the sealing member 13 may form an annular sealing structure, and the annular sealing structure surrounds the opening 112 of the accommodating chamber 111 . The seal 13 may be made of rubber material, felt material or flame retardant material.

Specifically, the sealing member 13 is provided with a plurality of perforations arranged at intervals along the circumference of the opening 112 , and the positions of the plurality of perforations correspond to the positions of the plurality of locking holes 116 on the box body 11 . During the installation process, the clamping structure 20 is successively pierced through the installation hole 121 on the cover 12, the perforation on the sealing member 13, and the clamping hole 116 on the box body 11, thereby fixing the cover body 12 on the box body 11. Opening 112 places.

In some examples, there may be a gap between the snapping structure 20 and the wall of the mounting hole 121, there may be a gap between the snapping structure 20 and the wall of the perforated hole, and there may be a gap between the snapping structure 20 and the wall of the snapping hole 116. Can have gaps.

The assembly and disassembly process of the cover body 12 and the box body 11 will be described below.

When it is necessary to install the cover body 12 to the box body 11, first place the cover body 12 on the top of the box body 11, so that the multiple mounting holes 121 on the cover body 12 are aligned with the multiple locking holes 116 on the box body 11. Correspondingly, insert a plurality of engaging structures 20 into the mounting holes 121 in a one-to-one correspondence, and when each engaging structure 20 is pressed down, each engaging structure 20 moves downward along the engaging hole 116, and more The lower end of each clamping piece 22 bends toward the central position close to the limit head 21, so that the clamping piece 22 can be smoothly inserted into the designated clamping position, and when the lower end of the clamping piece 22 reaches the clamping position, it will move away from the limit head 21. The central position of the clamping member 22 is movable, so that the hook 222 of the clamping member 22 is clamped and matched with the clamping position of the clamping hole 116 to realize the connection between the clamping structure 20 and the box body 11, thereby fixing the cover body 12 on the box body 11 .

When the cover body 12 needs to be opened, a tool can be used to pry the limit head 21 of the clamping structure 20, so that the connection between at least one clamping piece 22 and the limit head 21 is broken, so that the structure of the clamping structure 20 can be invalidated. , the clamping structure 20 can be removed from the cover 12 , so as to separate the cover 12 from the box 11 .

The battery pack 100 of the embodiment of the present application will be described below with reference to FIGS. 1-7 .

As shown in FIGS. 1-7 , the battery pack 100 of the embodiment of the present application includes the case assembly 10 of the battery pack of the above embodiment.

Since the battery pack box assembly 10 of the embodiment of the present application has the above technical effect, the battery pack 100 of the embodiment of the present application also has the above technical effect, that is, by using the battery pack box assembly 10 of the above embodiment, not only simplify After the installation steps are completed, and after the clamping structure 20 is fixed, it is easy to dismantle and maintain, and there is no need to apply glue, and no additional riveting equipment or tightening system is required, which can save the investment in corresponding design and equipment costs, and is conducive to reducing costs.

It can be understood that the other configurations and operations of the case assembly 10 of the battery pack and the battery pack 100 according to the embodiment of the present application are known to those skilled in the art and will not be described in detail here.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (19)

1. A box assembly of a battery pack, characterized in that it comprises: a box body, the box body defines an accommodating chamber with an opening for accommodating the electric core; A cover body, the cover body is arranged on the box body to close the opening, the cover body is provided with a detachable clamping structure, and the clamping structure is clamped and connected with the edge of the opening. 2 . The box assembly of the battery pack according to claim 1 , wherein a clamping hole is provided on an edge of the opening, and the clamping structure engages with the clamping hole. 3 . 3. The box assembly of the battery pack according to claim 2, wherein the clamping holes and the clamping structures respectively comprise a plurality, and the plurality of clamping structures are the same as the plurality of clamping holes. One-to-one card connection. 4 . The box assembly of the battery pack according to claim 3 , wherein a plurality of the clamping holes are arranged at intervals along the circumference of the opening. 5. The box assembly of the battery pack according to claim 2, wherein the cover body is provided with a mounting hole corresponding to the position of the locking hole, and the locking structure is detachably provided on the at the mounting hole. 6. The box assembly of the battery pack according to claim 5, wherein the engaging structure comprises: limit head; A plurality of clamping pieces, the multiple clamping pieces are arranged at intervals along a circumferential direction, and each of the clamping pieces is connected to the limit head; Wherein, the limit head is located on the side of the cover body facing away from the box body, and the clamping piece is passed through the installation hole and the clamping hole so that the clamping piece is connected to the Card hole snap fit. 7. The box assembly of the battery pack according to claim 6, wherein the clamping member is a rod-shaped structure, one end of the clamping member is connected to the limit head and the clamping member The other end of the snap fit with the card hole. 8. The box assembly of the battery pack according to claim 6, wherein the clamping member comprises: A connecting rod, one end of the connecting rod has a connecting portion, the connecting portion is connected to the limit head, and the thickness direction of the connecting portion and the connecting rod extends radially along the circumference; A hook, the hook is connected to the other end of the connecting rod, and the hook is snap-engaged with the hole. 9 . The box assembly of the battery pack according to claim 8 , wherein the thickness of the connecting portion is smaller than the thickness of the connecting rod. 10 . The box assembly of the battery pack according to claim 8 , wherein the thickness of the connecting portion gradually decreases from the connecting rod to the limiting head. 11 . 11 . The box assembly of the battery pack according to claim 8 , wherein a side of the connecting portion away from the center of the limit head has an oblique cut surface, and the oblique cut surface extends from the connecting rod to the The limit head extends towards the direction close to the center of the limit head. 12 . The box assembly of the battery pack according to claim 5 , wherein the clamping hole is a through hole. 13 . 13 . The box assembly of the battery pack according to claim 5 , wherein the clamping hole is a blind hole. 14 . 14. The box assembly of the battery pack according to claim 13, wherein the clamping hole includes a first hole and a second hole that communicate with each other, and the first hole is located between the installation hole and the second hole. between the second hole portions; Wherein, the size of the first hole is smaller than the size of the second hole so as to form a limiting surface between the first hole and the second hole, and the locking structure is suitable for The first hole extends to the second hole to cooperate with the limiting surface. 15. The battery pack box assembly according to any one of claims 1-14, wherein the clamping structure is an integral molded part. 16. The case assembly of the battery pack according to any one of claims 1-14, wherein the engaging structure is a plastic part. 17. The box assembly of the battery pack according to any one of claims 1-14, wherein the side wall of the box has a mounting flange extending toward the accommodating cavity, and the mounting flange The edge defines the opening, and the snap-in structure is snap-connected with the installation flange. 18. The case body assembly of the battery pack according to any one of claims 1-14, further comprising a sealing member, the sealing member being arranged between the case body and the cover body, so that The clamping structure passes through the sealing member. 19. A battery pack, characterized by comprising the case assembly of the battery pack according to any one of claims 1-18.

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