CN215220923U

CN215220923U - Mounting, battery package protective structure, battery package and vehicle

Info

Publication number: CN215220923U
Application number: CN202121476099.4U
Authority: CN
Inventors: 冯攀; 徐超
Original assignee: Shanghai Ideal Automobile Technology Co ltd
Current assignee: Shanghai Ideal Automobile Technology Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-17
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to a power battery technical field especially relates to a mounting, battery package protective structure, battery package and vehicle. The fixing piece provided by the disclosure is used for being fixed on a protective cover of a battery pack and comprises a fixing piece body, and a fixing piece claw nail and a fixing piece elastic sheet which are connected with the fixing piece body; the fixing piece claw nail is used for penetrating through the protective cover and deforming relative to the fixing piece body so as to realize the fixation of the fixing piece and the protective cover; the fixing piece elastic sheet is used for being clamped with the lower shell of the battery box when the protective cover is fixed with the lower shell of the battery box, so that the protective cover is fixed with the lower shell of the battery box. Through the fixed part that this disclosure provided of fixing on the protection casing of battery package, can realize the quick installation and the dismantlement of protection casing in the battery package in limited space, greatly improve production efficiency, reduction in production cost to can improve the protecting effect of protection casing, thereby improve the security of battery package.

Description

Mounting, battery package protective structure, battery package and vehicle

Technical Field

The utility model relates to a power battery technical field especially relates to a mounting, battery package protective structure, battery package and vehicle.

Background

Along with the continuous development of new energy automobile, the market occupation amount of new energy automobile is constantly promoting, and the security requirement of new energy automobile battery package also is constantly improving, and the country is more and more paid attention to the thermal diffusion safe time that the battery package thermal runaway arouses simultaneously. How to ensure the thermal runaway safety of the passenger compartment when the thermal diffusion occurs in the battery pack and the escape in a limited time is a problem to be overcome in the industry at the present stage.

The protective cover is used as one of the battery pack thermal runaway protection schemes and plays an important role in the battery pack thermal runaway protection. The protective cover is a fireproof composite material, is formed by compounding one or more fireproof layers, reinforcing layers and heat insulation layers, is soft in material and has certain elasticity, and has excellent jet impact resistance, jet flame impact resistance and explosion impact resistance. Because the protective cover belongs to flexible material, it is fairly friendly to the battery package that originally requires space utilization to be high. The existing protective cover fixing scheme is generally fixed on the lower shell of the battery box by adopting the modes of screws, rivets, bonding, bands and the like.

However, there is certain limitation in the fixed scheme of current protection casing, still has great not enough in the aspect of the protective effect and the fixed effect of protection casing:

1. disadvantages of screw/rivet/strap fixation: 1) the corresponding fixing points are designed in the battery pack to realize the fixation of the screws/rivets/bands; 2) because the protective cover is made of flexible elastic materials, the screw/rivet needs to be a large flat cushion or a large flange surface; 3) the protective cover is made of flexible elastic materials, the distance between the screw/the rivet is designed to be as small as possible, otherwise, the edge of the protective cover rebounds, and the protective effect of the protective cover is reduced; 4) the protective cover needs to be provided with fixing holes for mounting screws/rivets/bands in advance, and the time consumption is large during mounting and dismounting, so that the improvement of the dismounting efficiency is not facilitated; 5) the ribbon is fixed when thermal runaway and is fixed inefficacy, reduces the protective effect of protection casing.

2. Disadvantages of adhesive fixation: 1) the protective cover is made of flexible elastic materials, the protective cover has certain resilience after being bonded, and the bonded surface is easy to lose efficacy due to the fact that the bonded surface is too small, so that the protective effect of the protective cover is reduced; therefore, the bonding scheme has high requirement on bonding space and is not beneficial to the arrangement of the internal space of the battery pack; 2) because the adhesive can not bear high temperature generally, the adhesive layer is easy to lose efficacy when the thermal runaway occurs, thereby reducing the protective effect of the protective cover.

Therefore, it is highly desirable to design a protection structure for a battery pack, so as to achieve the rapid installation and disassembly of the protection cover in the battery pack in a limited space and improve the protection effect of the protection cover.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a fixing member, a battery pack protection structure, a battery pack, and a vehicle.

The fixing piece is used for being fixed on a protective cover of a battery pack and comprises a fixing piece body, and a fixing piece claw nail and a fixing piece elastic sheet which are connected with the fixing piece body; the fixing piece claw nail is used for penetrating through the protective cover and deforming relative to the fixing piece body so as to realize the fixation of the fixing piece and the protective cover; the fixing piece elastic sheet is used for clamping the protective cover and the lower shell of the battery box when the protective cover and the lower shell of the battery box are fixed, so that the protective cover and the lower shell of the battery box are fixed.

Optionally, the fixing part body has an inner side surface for being attached to the protective cover, the fixing part claw nail is connected to the periphery of the fixing part body and forms an included angle with the inner side surface of the fixing part body, and a sharp corner structure for puncturing the protective cover is arranged on the fixing part claw nail.

Optionally, the fixing body is rectangular, and at least two opposite side edges of the fixing body are respectively connected with the fixing claw nail.

Optionally, the fixing member body has an inner side surface for being attached to the protective cover and an outer side surface facing away from the protective cover, one end of the fixing member spring is connected to the fixing member body, the other end of the fixing member spring is separated from the fixing member body and protrudes out of the outer side surface of the fixing member body, and an included angle is formed between the fixing member spring and the outer side surface of the fixing member body.

Optionally, the fixing piece elastic sheet is rectangular, a through hole matched with the fixing piece elastic sheet in shape is formed in the fixing piece body, the fixing piece elastic sheet is connected with the hole wall of one side of the through hole, and gaps are formed between the fixing piece elastic sheet and the hole walls of the other three sides of the through hole.

The disclosure also provides a battery pack protection structure, which comprises a protection cover and the fixing piece according to any one of the above embodiments, wherein the fixing piece is fixed on the protection cover.

Optionally, the protective cover comprises a protective cover main body and folded edges connected to the peripheral edges of the protective cover main body; the quantity of mounting is a plurality of, and is a plurality of the mounting interval set up in on the four circumference hem of protection casing.

Optionally, the battery pack protection structure comprises a battery box lower shell, a protection cover accommodating groove for accommodating the peripheral folded edge of the protection cover is formed in the battery box lower shell, and a plurality of fixing clamping grooves are formed in the side wall of the protection cover accommodating groove at intervals; it is a plurality of the mounting all inserts in the protection casing holding tank, it is a plurality of the mounting shell fragment of mounting respectively with correspond fixed slot joint.

The present disclosure also provides a battery pack including the battery pack protection structure according to any of the above embodiments.

The present disclosure also provides a vehicle including the battery pack according to the above embodiment.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the fixing piece is fixed with the protective cover through the fixing piece claw nails, the fixing piece claw nails penetrate through the protective cover and deform relative to the fixing piece body to press on the protective cover, fixing of the fixing piece and the protective cover is achieved, the fixing piece and the protective cover are pressed into a whole, the fixing process of the fixing piece and the protective cover through the fixing piece claw nails is similar to the fixing process of conventional claw nails, the fixing process can be achieved through a special tool (similar to a claw nail machine), and therefore the fixing piece and the protective cover are quickly assembled into a whole; when the protective cover is fixed with the lower shell of the battery box, the fixing piece elastic sheet on the fixing piece is clamped with the lower shell of the battery box, so that the protective cover is fixed with the lower shell of the battery box, and compared with the conventional screw/rivet/ribbon fixing mode, the fixing mode can reduce the mounting space required by fixing the protective cover, thereby improving the space utilization rate of the battery pack, improving the dismounting efficiency of the protective cover, further reducing the production cost, further realizing the quick mounting and dismounting of the protective cover in the battery pack in a limited space, greatly improving the production efficiency and reducing the production cost; compared with the existing ribbon/adhesive fixing mode, the fixing reliability of the protective cover can be improved, and then the protective effect of the protective cover is improved when the battery pack is out of control due to heat, so that the safety of the battery pack is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural view of a fastener according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of the fixing member and the protective cover before being pressed together according to the embodiment of the disclosure;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

fig. 4 is a schematic structural view of the fixing member and the protective cover after being pressed together according to the embodiment of the disclosure;

FIG. 5 is a schematic view of a portion of the structure of FIG. 4;

fig. 6 is a schematic view of an installation structure of the protective cover and the fixing member and the lower case of the battery box according to the embodiment of the disclosure;

FIG. 7 is a schematic view of a portion of the structure of FIG. 6;

fig. 8 is a schematic view of a clamping structure of the protective cover and the fixing member with the lower case of the battery box according to the embodiment of the disclosure;

fig. 9 is a schematic sectional view along the direction a-a in fig. 8.

Wherein, 1-protective cover; 11-a shield body; 12-folding the periphery; 13-protective cover reinforcement layer; 14-protective cover fire-proof layer;

2-a fixing piece; 21-a fixture body; 22-fastener claw; 23-a fastener spring;

3-a lower battery box shell; 31-a shield receiving groove; 32-fixed card slot.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

As shown in fig. 1, the embodiment of the present disclosure provides a fixing member 2, and the fixing member 2 is used to be fixed to a protective cover 1 of a battery pack. Specifically, the fixing member 2 includes a fixing member body 21, and a fixing member nail 22 and a fixing member spring 23 connected to the fixing member body 21. As shown in fig. 2 to 5, the fixing claw nail 22 is configured to penetrate through the protection cover 1 and deform relative to the fixing body 21 to fix the fixing member 2 to the protection cover 1; as shown in fig. 6 to 9, the fixing piece elastic sheet 23 is used for being clamped with the battery box lower shell 3 when the protection cover 1 is fixed with the battery box lower shell 3, so as to fix the protection cover 1 with the battery box lower shell 3.

In specific implementation, the fixing member 2 may be formed by stamping a metal material (such as stainless steel, copper, etc.), and the metal material needs to have high toughness and high resilience, and may be pressed together with the protection cover 1 by a special tool after being formed.

In the fixing member 2 provided by the above embodiment of the present disclosure, the fixing member 2 can be quickly assembled with the protective cover 1 of the battery pack into a whole by the self-contained fixing member claw 22, the fixing member claw 22 passes through the protective cover 1 and deforms relative to the fixing member body 21 to press on the protective cover 1, so as to fix the fixing member 2 and the protective cover 1, the fixing process is similar to the fixing process of a conventional claw, and the fixing process can be realized by a special tool (similar to a claw nailing machine), so as to realize quick assembly of the fixing member 2 and the protective cover 1; when the protective cover 1 is fixed with the lower battery box shell 3, the fixing piece elastic sheet 23 on the fixing piece 2 is clamped with the lower battery box shell 3, so that the protective cover 1 is fixed with the lower battery box shell 3; compared with the existing screw/rivet/ribbon fixing mode, the fixing mode can reduce the mounting space required by the fixing of the protective cover, improve the space utilization rate of the battery pack, improve the dismounting efficiency of the protective cover and further reduce the production cost, so that the protective cover can be quickly mounted and dismounted in the battery pack in a limited space, the production efficiency is greatly improved, and the production cost is greatly reduced; compared with the existing ribbon/adhesive fixing mode, the fixing reliability of the protective cover can be improved, and then the protective effect of the protective cover is improved when the battery pack is out of control due to heat, so that the safety of the battery pack is improved.

In some embodiments of the present disclosure, as shown in fig. 1, the fastener body 21 provides a base for the fastener claw 22 and the fastener spring 23; the fixing member body 21 has an inner side surface for being attached to the shield 1 and an outer side surface facing away from the shield 1, and after the fixing member 2 is fixed to the shield 1, the inner side surface of the fixing member body 21 can be closely attached to the shield reinforcing layer 13, as shown in fig. 2 and 3. In general, the outer surface of the protection cover is a protection cover reinforcing layer, and the inner surface of the protection cover is a protection cover fireproof layer. The fixing member 2 is usually mounted on the outer side surface of the shield 1, and the inner side surface of the fixing member body 21 is bonded to the shield reinforcing layer 13; of course, the fixing piece can be arranged on the inner side surface of the protective cover according to the installation requirement, and in this case, the inner side surface of the fixing piece body is attached to the fireproof layer of the protective cover.

In some embodiments of the present disclosure, as shown in fig. 1, the fastener claw 22 is attached at the periphery of the fastener body 21 and forms an angle with the inside surface of the fastener body 21; before the fixing member 2 is fixed to the hood 1, the fixing member nails 22 are preferably formed at an angle of about 90 degrees with the inner side surface of the fixing member body 21, as shown in fig. 2 and 3; the fixing piece claw nail 22 is provided with a sharp-angled structure for puncturing the protective cover 1, so that when the fixing piece 2 is fixed with the protective cover 1, the sharp-angled structure of the fixing piece claw nail 22 is utilized to puncture the protective cover 1; then, the bent fastening claw 22 is pressed against the protection hood 1, specifically, the bent fastening claw 22 is pressed against the protection hood fireproof layer 14, and the inner side surface of the fastening body 21 is tightly attached to the protection hood reinforcing layer 13, so that the fastening member 2 is fastened to the protection hood 1, as shown in fig. 4 and 5. The fastener claw 22 shown on the right side in fig. 5 is a fastener claw before bending, and the fastener claw 22 shown on the left side in fig. 5 is a fastener claw after bending.

In some embodiments of the present disclosure, as shown in fig. 1, the fastener body 21 has a rectangular shape, and at least two opposite sides of the fastener body 21 are respectively connected with fastener nails 22. The fixing tool body 21 is connected with a plurality of fixing tool nails 22, so that the fixing fastness of the fixing tool 2 and the protective cover 1 is ensured. During specific implementation, the fixing piece nails 22 may be connected to two opposite sides of the fixing piece body 21, the fixing piece nails 22 may be connected to three sides of the fixing piece body 21, the fixing piece nails 22 may be connected to four sides of the fixing piece body 21, and the fixing piece nails may be reasonably arranged according to actual needs.

In one embodiment, as shown in fig. 1, the fixing piece body 21 has two fixing piece nails 22 connected to the upper side and the left and right sides thereof, respectively, and the fixing piece body 21 has two fixing piece nails 22 connected to the upper side thereof and one fixing piece nail 22 connected to the left and right sides thereof, respectively. By the arrangement, the firmness of fixing the fixing piece 2 with the protective cover 1 through the fixing piece claw nails 22 can be ensured; and while guaranteeing the fastness of fixing, do not connect the fixing piece claw nail 22 on the lower side edge of the fixing piece body 21 to reduce the quantity of fixing piece claw nail 22, practice thrift the material cost of fixing piece 2.

In some embodiments of the present disclosure, as shown in fig. 1, one end of the fixing piece elastic sheet 23 is connected to the fixing piece body 21, the other end is separated from the fixing piece body 21 and protrudes out of the outer side surface of the fixing piece body 21, and the fixing piece elastic sheet 23 forms an included angle with the outer side surface of the fixing piece body 21. The fixing piece elastic sheet 23 adopts the structure, so that the fixing piece elastic sheet 23 can be elastically deformed relative to the fixing piece body 21, the fixing piece elastic sheet 23 is conveniently and smoothly clamped with the lower battery box shell 3, and the protection cover 1 is fixed with the lower battery box shell 3; and be convenient for dismantle mounting shell fragment 23 from battery box lower casing 3 smoothly through the elastic deformation of mounting shell fragment 23 to make the dismouting of protection casing 1 more convenient, dismouting efficiency is higher.

In some embodiments of the present disclosure, as shown in fig. 1, the fixing piece elastic sheet 23 is rectangular, a through hole adapted to the shape of the fixing piece elastic sheet 23 is formed on the fixing piece body 21, the fixing piece elastic sheet 23 is connected to a hole wall of one side of the through hole, and gaps are formed between the fixing piece elastic sheet 23 and hole walls of the other three sides of the through hole. So set up to ensure that mounting shell fragment 23 can take place elastic deformation relative to mounting body 21, and make mounting shell fragment 23 can be opened to the direction of outstanding mounting body 21's outside surface bullet, also can withdraw to the direction of being close to mounting body 21's through-hole when receiving the extrusion simultaneously, thereby ensure that mounting shell fragment 23 carries out the joint with battery box lower casing 3 smoothly.

In one embodiment of the present disclosure, as shown in fig. 1, the fixing member body 21 and the fixing member spring 23 are both rectangular, three sides of the four sides of the fixing member body 21 are respectively connected with the fixing member nails 22, and the other sides are not connected with the fixing member nails 22; the middle part of the fixing part body 21 is provided with a through hole matched with the shape of the fixing part elastic sheet 23, the hole walls of the four sides of the through hole are respectively and adjacently arranged in one-to-one correspondence with the four sides of the fixing part body 21, and the hole wall of one side of the hole wall of the four sides of the through hole, which corresponds to the side of the fixing part body 21 not connected with the fixing part claw nail 22, is connected with the fixing part elastic sheet 23. The fixing part 2 adopts the structure, so that the fixing firmness of the fixing part 2 and the protective cover 1 is ensured, the quantity of the fixing part nails 22 is reduced as much as possible, the material consumption of the fixing part 2 is reduced, and the material cost of the fixing part 2 is saved. Of course, the specific structure of the fixing member 2 is not limited to the above specific limitations, and can be set and adjusted reasonably according to actual conditions.

Preferably, as shown in fig. 1, the fixing member 2 is an integral structure stamped from a metal material, and in this way, the fixing member 2 is easy to machine and form and has high structural strength. Of course, the fixing member 2 is not limited to a one-piece structure formed by press molding, and for example, the fixing member nails 22 may be fixedly connected to the fixing member body 21 by welding or the like.

The embodiment of the present disclosure further provides a protection structure of a battery pack, as shown in fig. 2 to 9, the protection structure of the battery pack includes a protection cover 1 and a fixing member 2 according to any one of the embodiments, and the fixing member 2 is fixed on the protection cover 1.

The protective structure of the battery pack provided by the above embodiment of the present disclosure has the beneficial effects of the fixing member of any embodiment because it includes the fixing member of any embodiment, and is not described herein again.

In some embodiments of the present disclosure, as shown in fig. 2 and 4, the shield 1 includes a shield body 11 and a hem connected to a peripheral edge of the shield body 11; the number of the fixing pieces 2 is multiple, and the fixing pieces 2 are arranged on the peripheral folding edges 12 of the protective cover 1 at intervals. The fixing pieces 2 are arranged on the peripheral folded edge 12 of the protective cover 1 at intervals, so that the firmness of fixing the protective cover 1 and the lower shell 3 of the battery box through the fixing pieces 2 is ensured. The specific number of the fixing pieces 2 and the specific arrangement positions of the fixing pieces 2 on the peripheral folded edges 12 of the protective cover 1 are not specifically limited and can be reasonably arranged as required.

In one embodiment of the present disclosure, as shown in fig. 6 and 7, a protective cover accommodating groove 31 for accommodating the peripheral folded edge 12 of the protective cover 1 is formed on the battery box lower housing 3, and a plurality of fixing clamping grooves 32 are formed at intervals on a side wall of the protective cover accommodating groove 31; in a plurality of mountings 2 all inserted protection casing holding tank 31, the mounting shell fragment 23 of a plurality of mountings 2 respectively with the fixed slot 32 joint that corresponds. The protective cover accommodating groove 31 is mainly used for accommodating the peripheral folded edges 12 of the protective cover 1, and can prevent high-temperature smoke from diffusing from the periphery of the protective cover 1 when the battery pack is out of control due to heat; the main function of the fixing slot 32 is to clamp the fixing piece spring 23 of the fixing piece 2, so as to fix the protection cover 1.

In a specific implementation, as shown in fig. 8 and 9, when the fixing member 2 is inserted into the shield receiving groove 31, the fixing member spring 23 of the fixing member 2 is compressed by the side wall of the shield receiving groove 31; when the fixing clip groove 32 that sets up on the lateral wall of mounting shell fragment 23 and protection casing holding tank 31 corresponds, mounting shell fragment 23 flicks and plays to fixing clip groove 32 in, forms the joint structure with fixing clip groove 32 to realize protection casing 1 and battery box casing 3's fixed, simple to operate. When the protection cover 1 needs to be detached, pressing force is applied to the fixing piece elastic sheet position of the fixing piece 2, so that the fixing piece elastic sheet 23 can be smoothly separated from the fixing clamping groove 32, and the detachment is convenient.

The embodiment of the present disclosure further provides a battery pack, which includes the battery pack protection structure according to any one of the above embodiments, and therefore, the battery pack protection structure according to any one of the above embodiments has the beneficial effects, which are not described herein again.

The embodiment of the present disclosure further provides a vehicle including the battery pack according to the above embodiment, so that the beneficial effects of the battery pack according to the above embodiment are achieved, and are not repeated herein.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The fixing piece is characterized in that the fixing piece (2) is used for being fixed on a protective cover (1) of a battery pack, and the fixing piece (2) comprises a fixing piece body (21), a fixing piece claw nail (22) and a fixing piece elastic sheet (23) which are connected with the fixing piece body (21);

the fixing piece claw nail (22) is used for penetrating through the protective cover (1) and deforming relative to the fixing piece body (21) so as to realize the fixation of the fixing piece (2) and the protective cover (1);

the fixing piece elastic sheet (23) is used for being clamped with the lower battery box shell (3) when the protective cover (1) is fixed with the lower battery box shell (3), so that the protective cover (1) is fixed with the lower battery box shell (3).

2. A fastener according to claim 1, wherein the fastener body (21) has an inside surface for engaging with the shield (1), the fastener claw (22) is attached to the periphery of the fastener body (21) at an angle to the inside surface of the fastener body (21), and the fastener claw (22) is provided with a pointed structure for piercing the shield (1).

3. The fastener according to claim 2, characterized in that the fastener body (21) is rectangular in shape, and the fastener claws (22) are attached to at least two opposite side edges of the fastener body (21), respectively.

4. The fixing member according to claim 1, wherein the fixing member body (21) has an inner side surface for being attached to the protective cover (1) and an outer side surface facing away from the protective cover (1), one end of the fixing member spring (23) is connected to the fixing member body (21), the other end of the fixing member spring is separated from the fixing member body (21) and protrudes from the outer side surface of the fixing member body (21), and the fixing member spring (23) forms an included angle with the outer side surface of the fixing member body (21).

5. The fixing piece according to claim 4, wherein the fixing piece elastic sheet (23) is rectangular, a through hole matched with the shape of the fixing piece elastic sheet (23) is arranged on the fixing piece body (21), the fixing piece elastic sheet (23) is connected with the hole wall of one side of the through hole, and gaps are formed between the fixing piece elastic sheet (23) and the hole walls of the other three sides of the through hole.

6. A battery pack protective structure comprising a protective cover (1) and a fixing member (2) according to any one of claims 1 to 5, wherein the fixing member (2) is fixed to the protective cover (1).

7. The battery pack protection structure according to claim 6, wherein the protection cover (1) comprises a protection cover main body (11) and a folded edge connected to a peripheral edge of the protection cover main body (11);

the number of the fixing pieces (2) is multiple, and the fixing pieces (2) are arranged on the peripheral folding edges (12) of the protective cover (1) at intervals.

8. The battery pack protection structure according to claim 7, wherein the battery pack protection structure comprises a battery box lower shell (3), a protection cover accommodating groove (31) for accommodating the peripheral folded edge (12) of the protection cover (1) is formed in the battery box lower shell (3), and a plurality of fixing clamping grooves (32) are formed in the side wall of the protection cover accommodating groove (31) at intervals;

a plurality of mounting (2) all insert in protection casing holding tank (31), it is a plurality of mounting shell fragment (23) of mounting (2) respectively with correspond fixed slot (32) joint.

9. A battery pack comprising the battery pack protective structure according to any one of claims 6 to 8.

10. A vehicle characterized by comprising the battery pack according to claim 9.