CN219892295U - Protective structure of battery pack and battery pack - Google Patents

Abstract

The utility model discloses a protective structure of a battery pack and the battery pack, wherein the protective structure comprises: the anti-explosion valve protection component is arranged on the bottom protection plate assembly and connected with the bottom protection plate assembly, and is suitable for corresponding to the position of the anti-explosion valve assembly of the battery pack; the guard plate is established on the backplate assembly at the bottom, and guard plate and backplate assembly interval arrangement are in order to form the buffering space, and on at least one end of guard plate extended to explosion-proof valve protection piece, wherein, be equipped with the bolster in the buffering space, the bolster is connected with guard plate and/or backplate assembly at the bottom. According to the protective structure provided by the embodiment of the utility model, the buffer piece is arranged between the protective plate and the bottom protective plate, so that the buffer piece can deform and absorb energy to attenuate vibration, and the protective performance of the protective structure on the battery pack is improved.

Description

Protective structure of battery pack and battery pack

Technical Field

The utility model relates to the technical field of battery pack protection, in particular to a protection structure of a battery pack and the battery pack.

Background

In the related art, various complex working conditions can be met in the running process of the electric vehicle, for example, when the electric vehicle is impacted, the problem that the battery pack in the vehicle is spontaneous in ignition and the like can be caused, and potential safety hazards exist.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a protection structure of a battery pack, which has good protection performance.

The utility model also provides a battery pack.

The protective structure according to the embodiment of the first aspect of the present utility model comprises: a bottom guard plate assembly; the explosion-proof valve protection piece is arranged on the bottom guard plate assembly and connected with the bottom guard plate assembly, and is suitable for being in position correspondence with the explosion-proof valve assembly of the battery pack; the protection plate is arranged on the bottom protection plate assembly, the protection plate and the bottom protection plate assembly are arranged at intervals to form a buffer space, at least one end of the protection plate extends to the explosion-proof valve protection piece, a buffer piece is arranged in the buffer space, and the buffer piece is connected with the protection plate and/or the bottom protection plate assembly.

According to the protective structure provided by the embodiment of the utility model, the buffer space is arranged between the protective plate and the bottom protective plate, and the buffer piece is arranged in the buffer space, so that the buffer piece can deform and absorb energy to attenuate vibration between the protective plate and the bottom protective plate assembly, the impact resistance of the protective structure is improved, and the protective performance of the protective structure on a battery pack is improved.

According to some embodiments of the utility model, opposite sides of the bumper are bonded to the fender and the bottom fender assembly, respectively.

According to some embodiments of the utility model, the protective plate is adapted to be adhesively engaged with a battery pack within the battery pack.

In some examples, a side of the protection plate facing away from the battery pack is connected with the explosion-proof valve protector and the buffer.

According to some embodiments of the utility model, the explosion proof valve protector includes at least two protection ribs disposed opposite each other on opposite sides of an explosion proof valve assembly, and an exhaust passage is defined between the explosion proof valve assembly, the explosion proof valve protector, and the bottom shield assembly.

In some examples, one protection rib is arranged between the exhaust channel and the buffer space, and a notch for communicating the exhaust channel with the buffer space is arranged on the protection rib; or, a plurality of protection ribs are arranged between the exhaust channel and the buffer space, and the protection ribs are arranged at intervals so that the exhaust channel is communicated with the buffer space.

In some examples, a plurality of spaced apart bumpers are disposed within the bumper space.

In some examples, the bottom shield assembly includes a bottom shield body, a coating applied to a side surface of the bottom shield body facing the shield, and/or an insulating sheet disposed on the bottom shield body opposite the explosion proof valve assembly.

According to the battery pack according to the second aspect of the embodiment of the utility model, the battery pack comprises the battery pack and the protection structure according to the first aspect of the embodiment of the utility model, energy generated by external impact on the battery pack can be absorbed by adopting the protection structure, the vibration performance, the bottom protection performance and the like of the whole battery pack are greatly improved, meanwhile, a channel is provided for gas emission of a battery cell in thermal runaway, and the safety protection capability of the battery pack is improved.

According to some embodiments of the utility model, the battery pack comprises a plurality of battery cells, the explosion-proof valve assembly comprises a plurality of explosion-proof valves arranged at the bottoms of the battery cells, and the extending direction of the protection plate is parallel to the extending direction of the battery cells.

According to some embodiments of the utility model, the bottom of each battery pack is provided with at least one explosion-proof valve assembly, and two ends of the protection plate respectively extend to the explosion-proof valve protection piece.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is an exploded view of a battery pack according to some embodiments of the present utility model;

fig. 2 is a cross-sectional view of a battery pack according to some embodiments of the present utility model;

FIG. 3 is an exploded schematic view of a protective structure according to some embodiments of the present utility model;

FIG. 4 is a schematic partial structural view of a protective structure according to some embodiments of the present utility model;

FIG. 5 is a schematic illustration of the construction of a bottom shield body according to some embodiments of the utility model;

FIG. 6 is a schematic diagram of a characteristic of a tendon according to some embodiments of the present utility model;

fig. 7 is a schematic diagram of a characteristic of a bumper according to some embodiments of the utility model.

Reference numerals:

the battery pack 1000, the protective structure 100, the battery pack 200, the battery cells 210,

the bottom guard plate assembly 10, the exhaust passage 101, the bottom guard plate body 11, the second convex portion 111, the coating 12, the insulating sheet 13,

the protective ribs 20, the notches 201,

the protection plate 30, the buffer member 31,

the explosion-proof valve assembly 40,

the support beam 50 is supported by a support beam,

battery pack cover 60, adhesive 61.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A guard structure 100 according to an embodiment of the present utility model is described below with reference to fig. 1-7.

As shown in fig. 1 to 7, a guard structure 100 according to an embodiment of the present utility model includes: the anti-explosion valve protection device comprises a bottom protection plate assembly 10, an anti-explosion valve protection piece and a protection plate 30, wherein the anti-explosion valve protection piece is arranged on the bottom protection plate assembly 10 and is connected with the bottom protection plate assembly 10, and the anti-explosion valve protection piece can correspond to the anti-explosion valve assembly 40 of the battery pack 1000 in position;

the guard plate 30 is arranged on the bottom guard plate assembly 10, the guard plate 30 and the bottom guard plate assembly 10 are arranged at intervals, a buffer space is formed between the guard plate 30 and the bottom guard plate assembly 10, at least one end of the guard plate 30 extends to the explosion-proof valve protection piece, for example, one end (the left end shown in fig. 1) of the guard plate 30 can extend to the explosion-proof valve protection piece positioned on the left side of the guard plate 30, the other end (the right end shown in fig. 1) of the guard plate 30 can extend to the explosion-proof valve protection piece positioned on the right side of the guard plate 30 and can also extend to other structural parts, so that stable support of the guard plate 30 is realized, and the stability of the guard plate 30 is improved.

Wherein, be provided with the bolster 31 in the buffering space, the bolster 31 can be connected with guard plate 30, or the bolster 31 is connected with end backplate assembly 10, or bolster 31 is connected with guard plate 30 and end backplate assembly 10 simultaneously, and the bolster 31 accessible warp the energy-absorbing in order to attenuate the vibration between guard plate 30 and the end backplate assembly 10, has improved the impact resistance of protective structure 100, has improved the barrier propterty of protective structure 100 to battery package 1000.

According to the protection structure 100 of the embodiment of the utility model, the buffer space is arranged between the protection plate 30 and the bottom protection plate, and the buffer piece 31 is arranged in the buffer space, so that the buffer piece 31 can deform and absorb energy to attenuate vibration between the protection plate 30 and the bottom protection plate assembly 10, the impact resistance of the protection structure 100 is improved, and the protection performance of the protection structure 100 on the battery pack 1000 is improved.

As shown in fig. 1 and 4, in some examples, each battery cell 210 has two corresponding explosion-proof valves, so that the battery pack has two corresponding explosion-proof valve assemblies 40, the protection structure has two corresponding explosion-proof valve protection pieces, both ends of the protection plate 30 may extend onto the explosion-proof valve protection pieces, i.e., the left end of the protection plate 30 may extend to the explosion-proof valve protection piece located at the left side of the protection plate 30, and the right end of the protection plate 30 may extend to the explosion-proof valve protection piece located at the right side of the protection plate 30, so as to stably support the protection plate 30, and improve the stability of the protection plate 30.

In addition, the lower case of the battery pack 1000 has a frame, the middle of the frame has a support beam 50, the support beam 50 extends in the front-rear direction, and both ends of the support beam 50 (front-rear ends as shown in fig. 1) are connected with opposite sides of the frame (front-rear sides as shown in fig. 1), both ends of the battery cell 210 may be supported on the frame and the support beam 50, while one end of the protection plate 30 may extend to the explosion-proof valve protection member, and the other end of the protection plate 30 may extend to the support beam 50 of the lower case of the battery pack 1000, which may also play a supporting role on the protection plate 30, improving the stability of the protection plate 30.

As shown in fig. 1, 2 and 3, in some examples, the protection plate 30 corresponds to the bottom of the entire battery pack 1000, and is hollowed out at the opposite regions of the explosion-proof valve assembly 40, so as to form the exhaust passage 101, and simultaneously facilitate processing, and reduce processing costs.

As shown in fig. 1 and 3, according to some embodiments of the present utility model, opposite sides (upper and lower sides as shown in fig. 1) of the buffer 31 are bonded to the protection plate 30 and the bottom protection plate assembly 10, respectively, so as to achieve a fixed connection of the protection plate 30 and the bottom protection plate assembly 10, thereby improving structural stability of the protection structure 100, and improving the ability of the protection structure 100 to attenuate shock and absorb impact energy, which is advantageous for the protection structure 100 to sufficiently protect the battery pack 1000.

As shown in fig. 1, 2 and 3, in some examples, the cushioning member 31 may be bonded to the fender 30 and the bottom fender assembly 10 by a structural adhesive, which is easy and inexpensive to operate.

As shown in fig. 1 and 2, according to some embodiments of the present utility model, the protection plate 30 may be adhesively engaged with the battery pack 200 in the battery pack 1000, so as to achieve a fixed connection between the protection plate 30 and the battery pack 200, so that the probability of detachment of the protection plate 30 from the battery pack 200 can be reduced, the stability of the protection plate 30 is improved, and the protection plate 30 is beneficial to fully protecting the battery pack 200.

As shown in fig. 1 and 2, in some examples, the protection plate 30 may be adhered to the battery pack 200 by a structural adhesive, which is convenient to operate and inexpensive.

In some examples, the protection plate 30 may be made of metal material such as aluminum or steel or composite material, and has long service life, and the protection plate 30 may also be made of insulating material such as Polycarbonate (PC), polystyrene (PS) or epoxy resin with certain rigidity, which has high insulating performance and high mechanical strength, and can effectively protect the battery pack 1000 and personnel from electric shock or mechanical damage.

As shown in fig. 1 and 2, in some examples, a side (a lower side as shown in fig. 1) of the shielding plate 30 facing away from the battery pack 200 is connected with the explosion-proof valve protector and the buffer 31, for example, an end portion of the lower side of the shielding plate 30 may be directly bonded with the explosion-proof valve protector through a structural adhesive, and a middle portion of the lower side of the shielding plate 30 may be bonded with the bottom shielding plate assembly 10 through the buffer 31, thereby facilitating deformation energy absorption of the buffer 31 to the middle portion of the shielding plate 30, improving impact resistance of the shielding plate 30, and reducing cost; of course, the underside of the protection plate 30 can be completely adhered to the bottom protection plate assembly 10 through the buffer 31, so that the impact resistance of the whole protection structure 100 is improved, and the protection capability of the protection structure 100 to the battery pack 1000 is improved.

As shown in fig. 1, according to some embodiments of the present utility model, the explosion-proof valve protection member includes at least two protection ribs 20, i.e., the number of the protection ribs 20 may be two, the two protection ribs 20 are oppositely disposed at opposite sides (left and right sides as shown in fig. 1) of the explosion-proof valve assembly 40, and the protection ribs 20 may absorb energy by deformation to improve the impact resistance of the explosion-proof valve assembly 40, so as to achieve effective protection of the explosion-proof valve assembly 40, and of course, the number of the protection ribs 20 may be more; the exhaust channel 101 is defined among the explosion-proof valve assembly 40, the explosion-proof valve protection piece and the bottom guard plate assembly 10, and the exhaust channel 101 can guide high-temperature flue gas exhausted by the explosion-proof valve assembly 40 to the outside so as to reduce the probability of accumulation of the high-temperature flue gas in the battery pack 1000, further reduce the probability of thermal runaway of the battery pack 1000, and improve the safety of the battery pack 1000, namely, by arranging the protection ribs 20 on two opposite sides of the explosion-proof valve assembly 40, the impact resistance of the explosion-proof valve assembly 40 can be improved, so that the effective protection of the explosion-proof valve assembly 40 is realized.

As shown in fig. 1, 2 and 3, according to some embodiments of the present utility model, a protection rib 20 may be provided between the exhaust channel 101 and the buffer space, and a notch 201 is provided on the protection rib 20, where the notch 201 may communicate the exhaust channel 101 with the buffer space, so that the smoke in the exhaust channel 101 may be dispersed and discharged into the buffer space, the diffusion efficiency of the high-temperature smoke discharged by the explosion-proof valve assembly 40 may be improved, the probability of thermal runaway of the battery pack 1000 may be reduced, and the safety of the battery pack 1000 may be improved; of course, a plurality of protection ribs 20 may be disposed between the exhaust channel 101 and the buffer space, and the plurality of protection ribs 20 are arranged at intervals along the front-rear direction, so that a channel is formed between the two protection ribs 20, so that the exhaust channel 101 is communicated with the buffer space, and high-temperature flue gas exhausted by the explosion-proof valve assembly 40 is facilitated to be rapidly dissipated.

In some examples, the protection rib 20 may prevent cross transfer of the internal and external temperatures of the explosion-proof valve, and may improve sealability of the explosion-proof valve, thereby avoiding a leakage phenomenon caused by medium flow, and may ensure normal operation and service life of the explosion-proof valve.

In some examples, the protection rib 20 may be made of a structure and a material with certain rigidity and elasticity for absorbing energy, the characteristic curve of the protection rib 20 is shown in fig. 6, and when the bottom of the battery pack 1000 is impacted by the outside, the protection rib 20 can deform for absorbing energy to effectively protect the battery pack 200, so as to ensure personal safety and stable operation of the battery pack 1000; in addition, the protection rib 20 can be internally provided with a cavity, so that the protection rib 20 can deform and absorb energy conveniently.

According to some embodiments of the present utility model, the distance between the protection rib 20 and the edge of the explosion-proof valve assembly 40 is not less than 10mm, for example, the distance between the protection rib 20 and the edge of the explosion-proof valve assembly 40 may be 10mm, 15mm or 20mm, so that a sufficient buffer space between the protection rib 20 and the explosion-proof valve may be ensured, which is beneficial to the protection rib 20 to fully deform and absorb energy when the battery pack 1000 is impacted by the outside, and the protection performance of the protection rib 20 on the explosion-proof valve is improved.

As shown in fig. 1 and 3, in some examples, a plurality of buffer members 31 arranged at intervals are disposed in the buffer space, and then a cavity can be reserved between two adjacent buffer members 31, so that the protection plate 30 deforms and absorbs energy, the impact resistance of the protection plate 30 is improved, the cost is reduced, meanwhile, the buffer members 31 are convenient to install and arrange, an operator can uniformly stress the protection plate 30 and the bottom protection plate assembly 10 by increasing or decreasing the number of the buffer members 31, and the operator can adjust the positions of the buffer members 31 according to the actual application requirements so as to improve the protection performance of the protection structure 100.

In some examples, the buffer member 31 may be soft PP, and EPP45, EPP60, EPP90, 5 times MPP, or 10 times MPP, etc., which has strong ability to absorb energy, so as to be beneficial to improving the protection performance of the protection structure 100, and the characteristic curve of the buffer member 31 is shown in fig. 7; the buffer member 31 may be square or round, so that the processing and manufacturing are facilitated, and the buffer member 31 may also be honeycomb-shaped or oval-shaped, for example, the buffer member 31 adopts MPP square microporous foam or MPP cellular foam, so that the buffering effect can be improved, and the protection performance of the protection structure can be improved.

As shown in fig. 1 and 5, in some examples, the bottom guard plate assembly 10 may include a bottom guard plate body 11 and a coating layer 12, the coating layer 12 is coated on a surface of a side (an upper side as shown in fig. 1) of the bottom guard plate body 11 facing the guard plate 30, and the coating layer 12 may be an insulating material layer, thereby reducing the probability of an arc discharge phenomenon of the battery cell 210 in thermal runaway, and simultaneously reducing the probability of a short circuit of the battery pack 200, improving the safety performance of the battery pack 200, and the insulating sheet 13 is disposed opposite to the explosion-proof valve assembly 40, preventing spatial overlapping, improving the space utilization inside the battery pack 1000, and improving the energy density of the battery pack 1000.

In other examples, the bottom guard plate assembly 10 includes a bottom guard plate body 11 and an insulating sheet 13, the insulating sheet 13 is disposed on the bottom guard plate body 11, and the insulating sheet 13 is disposed opposite to the explosion-proof valve assembly 40, so that the probability of arcing of the battery cell 210 in thermal runaway can be reduced, the probability of short circuit of the battery pack 200 can be reduced, the safety performance of the battery pack 200 is improved, and the insulating sheet 13 is disposed opposite to the explosion-proof valve assembly 40, so that space overlapping can be prevented, the space utilization inside the battery pack 1000 is improved, and the energy density of the battery pack 1000 is improved; in addition, the insulating sheet 13 can reduce the manufacturing cost while ensuring the safety of the battery pack 200.

Of course, the coating 12 and the insulating sheet 13 may be provided on the bottom guard plate body 11 at the same time, thereby further improving the reliability of the structure.

The bottom protection plate body 11 has a plurality of second protruding parts 111 protruding towards one side (the lower side as shown in fig. 1) away from the protection plate 30, so that the structural strength of the bottom protection plate body 11 can be improved, the service life of the bottom protection plate body 11 can be prolonged, the buffer space can be increased, deformation and energy absorption of the bottom protection plate body 11 are facilitated when the bottom of the battery pack 1000 is impacted, and the protection performance of the protection structure 100 is improved; furthermore, a coating may also be provided on the side of the bottom shield body 11 facing away from the shield 30. In some examples, the bottom shield body 11 may be made of high-strength steel such as HC340 or 590DP, or heat-formed steel, etc., which may effectively resist impact and abrasion to the bottom of the bottom shield body 11, and improve wear resistance of the bottom shield body 11, thereby prolonging the service life of the bottom shield body 11, and the bottom shield body 11 made of high-strength steel or heat-formed steel may be able to bear greater weight and load, so as to enhance its structural strength and stability.

In some examples, the coating 12 may be a PP coating that has good impact resistance, strong chemical resistance, and good electrical insulation and high temperature resistance, and is inexpensive; the coating 12 may also be a PC coating having higher strength, better toughness, and better high temperature resistance and electrical insulation.

As shown in fig. 1 to 7, the battery pack 1000 according to the embodiment of the utility model includes the battery pack 200 and the protection structure 100, and by adopting the protection structure 100, energy generated by external impact on the battery pack 1000 can be absorbed, so that vibration performance, bottom protection performance and the like of the whole battery pack 1000 are greatly improved, and meanwhile, a channel is provided for gas discharge of the battery cells 210 in thermal runaway, and safety protection capability of the battery pack 1000 is improved.

As shown in fig. 1, according to some embodiments of the present utility model, the battery pack 200 includes a plurality of battery cells 210, the battery pack 1000 is provided with a plurality of battery packs 200, the explosion-proof valve assembly 40 includes a plurality of explosion-proof valves corresponding to the battery cells 210, and the explosion-proof valves are disposed at the bottoms of the battery cells 210, so that the explosion-proof valves can conveniently discharge high-temperature smoke when the battery cells 210 are out of control, thereby reducing the probability of high-temperature smoke being accumulated near the battery cells 210 and improving the safety of the battery cells 210.

Wherein, the protection plate 30 extends along the left-right direction, and the battery cell 210 extends along the left-right direction in parallel with the two extending directions, thereby being beneficial to attaching the protection plate 30 and the battery cell 210, effectively fixing and protecting the battery cell 210, preventing the battery cell 210 from moving or deforming due to vibration, stress and other reasons in the use process, reducing the probability of the battery cell 210 generating safety problems such as short circuit, combustion, explosion and the like, thereby improving the stability and durability of the battery cell 210, and simultaneously being beneficial to radiating the battery cell 210, thereby reducing the working temperature of the battery cell 210 and prolonging the service life of the battery cell 210.

As shown in fig. 1, according to some embodiments of the present utility model, the bottom of each battery pack 200 may have one explosion-proof valve assembly 40, or may have a plurality of explosion-proof valve assemblies 40, for example, the bottom of each battery pack 200 has two explosion-proof valve assemblies 40, two ends (left and right ends as shown in fig. 1) of the protection plate 30 extend to the explosion-proof valve protection members, respectively, and by providing the plurality of explosion-proof valve assemblies 40, the explosion-proof valves can be rapidly deflated when the internal pressure of the battery pack 200 is abnormally increased, so that the internal pressure of the battery pack 200 is effectively controlled, the stability of the battery pack 200 is improved, the safety of personnel and equipment is ensured, and the service life of the battery pack 200 is prolonged.

As shown in fig. 1, in some examples, the battery pack 1000 further has a pack upper cover 60, the pack upper cover 60 is located at an upper side of the battery pack 200, and the pack upper cover 60 may be connected with a lower case of the battery pack or may be adhered to the battery pack 200 by an adhesive 61, which may provide heat conduction and connection.

In some examples, the battery pack upper cover 60 may be welded to the case of the battery pack 1000, and the fixing connection is effective and convenient to operate.

Other constructions and operations of the battery pack 1000 according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein. In the description of the utility model, a "first feature" or "second feature" may include one or more of such features. The vertical direction, the horizontal direction, and the front-rear direction are defined by the vertical direction, the horizontal direction, and the front-rear direction in the drawing.

In the description of the present utility model, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A protective structure of a battery pack, comprising:

a bottom guard plate assembly;

the explosion-proof valve protection piece is arranged on the bottom guard plate assembly and connected with the bottom guard plate assembly, and is suitable for being in position correspondence with the explosion-proof valve assembly of the battery pack;

the protection plate is arranged on the bottom protection plate assembly, the protection plate and the bottom protection plate assembly are arranged at intervals to form a buffer space, at least one end of the protection plate extends to the explosion-proof valve protection piece,

and the buffer space is internally provided with a buffer part, and the buffer part is connected with the protection plate and/or the bottom protection plate assembly.

2. The protective structure of a battery pack according to claim 1, wherein opposite sides of the buffer are bonded to the guard plate and the bottom guard plate assembly, respectively.

3. The protective structure of a battery pack of claim 1, wherein said protective plate is adapted for adhesive engagement with a battery pack within said battery pack.

4. The protective structure of a battery pack according to claim 3, wherein a side of the protection plate facing away from the battery pack is connected with the explosion-proof valve protection member and the buffer member.

5. The protective structure of a battery pack of claim 1, wherein the explosion-proof valve protector includes at least two protection ribs disposed opposite sides of the explosion-proof valve assembly, and an exhaust passage is defined between the explosion-proof valve assembly, the explosion-proof valve protector, and the bottom guard plate assembly.

6. The protective structure of the battery pack according to claim 5, wherein one of the protective ribs is provided between the exhaust passage and the buffer space, and a notch for communicating the exhaust passage with the buffer space is provided on the protective rib; or alternatively, the first and second heat exchangers may be,

a plurality of protection ribs are arranged between the exhaust channel and the buffer space, and the protection ribs are arranged at intervals so that the exhaust channel is communicated with the buffer space.

7. The protective structure of a battery pack according to any one of claims 1 to 6, wherein the bottom guard assembly includes a bottom guard body, a coating layer applied to a side surface of the bottom guard body facing the protective plate, and/or an insulating sheet provided on the bottom guard body and disposed opposite the explosion-proof valve assembly.

8. A battery pack characterized by comprising a battery pack and the protective structure of the battery pack according to any one of claims 1 to 7.

9. The battery pack of claim 8, wherein the battery pack comprises a plurality of battery cells, the explosion-proof valve assembly comprises a plurality of explosion-proof valves arranged at the bottoms of the battery cells, and the extending direction of the protection plate is parallel to the extending direction of the battery cells.

10. The battery pack of claim 8, wherein the bottom of each battery pack has at least one of the explosion-proof valve assemblies, and both ends of the protection plate extend to the explosion-proof valve protection member, respectively.