CN217387363U

CN217387363U - Protection plate, battery pack and electric vehicle

Info

Publication number: CN217387363U
Application number: CN202220781389.8U
Authority: CN
Inventors: 王俊; 周宇; 胡博; 徐建洲; 谭晶
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-06
Anticipated expiration: 2032-03-31

Abstract

The application provides a guard plate, battery package and electric vehicle. The protection plate is used for being installed on one side of the battery tray. The guard plate includes the buffer layer, locates the buffer layer is kept away from the first inoxidizing coating of one side of battery tray, and locates battery tray with second inoxidizing coating between the buffer layer. Wherein the buffer layer is made of an insulating material and has a buffer gap; the first protective layer and the second protective layer are both made of conductive materials and are connected in an active circuit containing an alarm device. First inoxidizing coating with the second inoxidizing coating is used for first inoxidizing coating receives to be kept away from contact each other during the ascending extrusion of one side direction of second inoxidizing coating to switch on active circuit is in order to trigger alarm device reports to the police, so, can in time remind the user to inspect the maintenance the guard plate avoids first inoxidizing coating receives the damage when extruding once more the battery in the battery tray is favorable to improving the security of battery.

Description

Protection plate, battery pack and electric vehicle

Technical Field

The application relates to the technical field of batteries, especially, relate to a guard plate that can realize early warning, include the battery package of guard plate, and include the electric vehicle of battery package.

Background

At present, a protection plate is usually arranged at the bottom of the battery pack to protect the bottom of the battery pack and prevent the bottom of the battery pack from being impacted, extruded or scratched. However, the existing protection plate has no early warning function, and when the protection plate is seriously damaged and even has influenced the battery inside the battery pack, the electric vehicle has no early warning function, so that a user cannot check and maintain the vehicle in time, and the battery pack is in a high-risk out-of-control state.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. For this reason, this application provides a guard plate, battery package and electric vehicle, the guard plate is used for installing the one side at battery tray, the guard plate can be kept away from at it trigger alarm device during the ascending extrusion of one side direction of battery tray and report to the police to can in time remind the user to inspect the maintenance the guard plate is avoided the guard plate receives damage when extruding again battery in the battery tray is favorable to improving the security of battery.

In order to accomplish the above object, in a first aspect, the present application provides a protection plate for being mounted at one side of a battery tray, the protection plate including:

a buffer layer made of an insulating material and having a buffer gap;

the first protective layer is arranged on one side, far away from the battery tray, of the buffer layer; and

the second protective layer is arranged between the battery tray and the buffer layer;

the first protective layer and the second protective layer are both made of conductive materials and are connected in an active circuit with an alarm device; the first protective layer and the second protective layer are used for being in contact with each other when the first protective layer is squeezed in the direction of one side far away from the second protective layer, so that the active circuit is conducted to trigger the alarm device to alarm.

In one embodiment, the protection plate further comprises a connector, wherein the connector is connected to the active circuit; the first protective layer and the second protective layer are respectively connected to the connector and are connected to the active circuit through the connector.

In one embodiment, the buffer layer comprises a frame region and a grid region located in the frame region; the frame area is used for connecting the first protective layer and the second protective layer in a sealing mode; the grid area comprises a plurality of buffer units which are connected with each other, each buffer unit is formed by enclosing supporting ribs with the thickness smaller than a preset value, and the enclosed spaces enclosed by the supporting ribs form the buffer gaps;

wherein the cross-sectional shape of the buffer unit includes at least one of a rectangle, a circle, a polygon and an ellipse.

In one embodiment, a reinforcing structure is arranged on one side of the first protective layer close to the buffer layer and/or one side of the first protective layer far away from the buffer layer, and the reinforcing structure comprises protrusions and/or reinforcing ribs;

and/or a first contact bump is arranged on one side of the first protective layer facing the buffer layer and corresponding to the buffer gap of at least one buffer unit;

and/or a second contact bump is arranged on one side, facing the buffer layer, of the second protective layer at a position corresponding to the buffer gap of at least one buffer unit.

In a second aspect, the present application also provides another protection plate for installation at one side of a battery tray, the battery tray including a bottom plate for installation of the protection plate, the protection plate including:

a buffer layer made of an insulating material and having a buffer gap;

the first protective layer is arranged on one side of the buffer layer, which is far away from the bottom plate;

the bottom plate and the first protective layer are both made of conductive materials and are connected in an active circuit containing an alarm device; the bottom plate and the first protective layer are used for being in contact with each other when the first protective layer is squeezed in the direction of one side far away from the bottom plate, so that the active circuit is conducted to trigger the alarm device to alarm.

In one embodiment, the protection plate further comprises a connector, wherein the connector is connected to the active circuit; the first protective layer and the bottom plate are respectively connected to the connectors and are connected to the active circuit through the connectors.

In one embodiment, the buffer layer comprises a frame region and a grid region located in the frame region; the frame area is used for connecting the bottom plate and the first protective layer in a sealing mode; the grid area comprises a plurality of buffer units which are connected with each other, each buffer unit is formed by enclosing supporting ribs with the thickness smaller than a preset value, and the enclosed spaces enclosed by the supporting ribs form the buffer gaps;

and/or a second contact bump is arranged on one side of the bottom plate facing the buffer layer and corresponding to the buffer gap of at least one buffer unit.

In a third aspect, the present application provides a battery pack, including a battery tray, a battery, and the protection plate of any of the above embodiments, wherein the battery and the protection plate are respectively installed on two opposite sides of the battery tray.

In a fourth aspect, the present application provides an electric vehicle including the battery pack described above.

In the guard plate, the battery package and the electric vehicle provided by the application, the guard plate is used for installing one side of a battery tray of the battery package far away from a battery, the battery tray comprises a bottom plate used for installing the guard plate, the guard plate at least comprises a buffer layer made of an insulating material and a first protective layer made of a conductive material, the bottom plate is made of the conductive material or the guard plate further comprises a second protective layer made of the conductive material, a buffer gap is formed between the bottom plate and the first protective layer, the buffer layer is used for separating the first protective layer and the bottom plate or the second protective layer under a normal state, when the guard plate is extruded by a more serious collision in one side direction far away from the battery tray, the first protective layer can extrude the buffer layer and the bottom plate or the second protective layer to mutually contact at the buffer gap corresponding to the buffer layer, therefore, the active circuit where the active circuit is located is conducted, and the alarm device in the active circuit is triggered to alarm. So, can in time remind user's inspection and maintenance the guard plate avoids first protective layer harms when receiving the extrusion once more battery in the battery tray is favorable to improving the security of battery.

Additional aspects and advantages of the present 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 present application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic partial perspective view of an electric vehicle according to an embodiment of the present disclosure.

Fig. 2 is a partially exploded perspective view of the battery pack shown in fig. 1.

Fig. 3 is a perspective view of the fender shown in fig. 2 from another perspective.

Fig. 4 is a partially exploded perspective view of the shielding plate shown in fig. 2.

Fig. 5 is a schematic perspective view of the buffer layer shown in fig. 4.

Fig. 6 is an enlarged schematic view of a VI portion shown in fig. 5.

Fig. 7 is a schematic perspective view of the buffer layer shown in fig. 5 in another embodiment.

Fig. 8 is a schematic perspective view of a buffer layer shown in fig. 5 according to another embodiment.

Fig. 9 is a schematic perspective view of the first protective layer and the second protective layer shown in fig. 4.

Fig. 10 is an enlarged schematic view of the X portion shown in fig. 3.

Fig. 11 is a schematic partial perspective exploded view of a battery pack according to another embodiment of the present application.

Description of the main element symbols:

battery pack 1

Vehicle body 3

Base plate 11

Protection plate 13

Buffer layer 131

Frame area 1312

Grid area 1314

Buffer unit 1316

Support rib 1318

First protective layer 133

Reinforcing structure 1332

First contact bump 1334

Second protective layer 135

Second contact bump 1354

Connector 137

Conducting wire 139

The following detailed description further describes the present application in conjunction with the accompanying drawings.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

Referring to fig. 1, the present application discloses an electric vehicle, which includes a battery pack 1 and a vehicle body 3, wherein the battery pack 1 is fixed at the bottom of the vehicle body 3, and the battery pack 1 is used for providing electric energy for the electric vehicle. It should be noted that the electric vehicle further includes other components such as a battery management system and a power system, and the electric vehicle may be any one of electric vehicles in the prior art, and the specific structure thereof is not described herein again.

Referring to fig. 2, in the embodiment of the present application, the battery pack 1 includes a battery tray having a bottom plate 11, and a battery (not shown) and a protection plate 13 mounted on the bottom plate 11, the battery and the protection plate 13 being respectively mounted on opposite sides of the bottom plate 11.

Optionally, the battery tray may further include a frame connected to the peripheral edge of the bottom plate 11, and a cover plate covering the frame, the cover plate, the frame, and the bottom plate 11 enclose to form an accommodating cavity, and the battery is disposed in the accommodating cavity and can be protected from all directions.

Still optionally, the battery may be one or more single batteries, or may be one or more battery modules, which is not limited in this respect. Preferably, in an embodiment of the present application, the battery includes a plurality of battery modules to increase the capacity of the battery.

It is understood that, in the embodiment of the present application, the battery pack 1 is fixed to the bottom of the vehicle body 3 through the battery tray, and the shielding plate 13 is located between the bottom of the vehicle body 3 and the bottom plate 11. When the bottom of automobile body 3 receives the collision extrusion of foreign matter such as stone, guard plate 13 with bottom plate 11 can offset in proper order the extrusion force that the foreign matter brought avoids the extrusion force acts on and damage on the battery, thereby the protection the battery. It is understood that when the bottom of the vehicle body 3 is subjected to a relatively severe crash and extrusion to generate a relatively large extrusion force, the protection plate 13 will deform in a direction approaching the bottom plate 11 under the action of the extrusion force to further extrude the bottom plate 11, and even the bottom plate 11 may deform to extrude the battery, so that the battery is damaged and is in a high-risk out-of-control state, and a fire and explosion hazard exists.

In order to avoid the battery pack 1 from being in a high-risk out-of-control state when the bottom of the vehicle body 3 is pressed by a violent collision, in the embodiment of the present application, the guard plate 13 can implement a warning to improve the safety of the battery in the battery pack 1.

Specifically, referring to fig. 2 to 4, in one embodiment of the present application, the protection plate 13 includes a buffer layer 131, a first protection layer 133 stacked on a side of the buffer layer 131 far from the battery tray (specifically, the bottom plate 11), and a second protection layer 135 stacked between the bottom plate 11 and the buffer layer 131.

Wherein the buffer layer 131 is made of an insulating material, which may be, but not limited to, an insulating plastic, a composite material, etc., and has a buffer gap. The first and second shield layers 133 and 135 are each made of a conductive material, which may be, but is not limited to, metal, carbon fiber, or the like. In the embodiment of the present application, the buffer layer 131 is made of an insulating plastic, the first protective layer 133 and the second protective layer 135 are made of a metal material such as stainless steel, and the buffer layer 131 made of an insulating plastic has a light weight, so that a load of the electric vehicle can be reduced, and the first protective layer 133 and the second protective layer 135 can be insulated and isolated effectively.

It is important to note that in the embodiments of the present application, the first protective layer 133 and the second protective layer 135 are connected in an active circuit (not shown) including an alarm device (not shown). It is understood that in a normal state (i.e. the bottom of the vehicle body 3 is not pressed by a foreign object collision), the first protective layer 133 and the second protective layer 135 are insulated and isolated by the buffer layer 131, so that the active circuit is in an open state, and the alarm device cannot be triggered; as described above, when the bottom portion of the vehicle body 3 is subjected to a relatively severe crash compression to generate a relatively large compression force, the protection plate 13 is also pressed by the relatively severe collision in the direction away from the side of the battery tray, the shielding plate 13 will be deformed in a direction approaching the bottom plate 11 by the pressing force, and the first shield layer 133 is deformed toward the second shield layer 135 first, so that the first protective layer 133 can press the buffer layer 131 and get closer to the second protective layer 135, when the deformation of the first protective layer 133 is serious, the first protective layer 133 and the second protective layer 135 contact each other at a buffer gap corresponding to the buffer layer 131, and at this time, the first protection layer 133 and the second protection layer 135 are conducted so that the active circuit is in a closed state, and the alarm device is triggered to alarm. So, under alarm device's the warning suggestion, can in time remind the user to inspect the maintenance guard plate 13 avoids first inoxidizing coating 133 leads to when receiving the extrusion once more bottom plate 11 also takes place serious deformation and harm battery in the battery tray is favorable to improving the security of battery.

Optionally, in the embodiments of the present application, the alarm device may be, but is not limited to, a buzzer, an indicator light, and the like. Still alternatively, in the embodiment of the present application, the active circuit may be disposed in the protection plate 13, may be disposed in another component (for example, the bottom plate 11) of the battery pack 1 except the protection plate 13, and may be disposed in another component of the electric vehicle except the battery pack 1. Preferably, in the embodiment of the present application, the active circuit is disposed in other components of the electric vehicle except for the battery pack 1, which is beneficial to simplify the structure of the battery pack 1; the alarm device is connected with the active circuit and is arranged on an indicating lamp in a cockpit of the electric vehicle, so that a user can visually and timely find alarm prompts.

Preferably, as shown in fig. 2 and 3, in one embodiment of the present application, the protection plate 13 further includes a connector 137, and the connector 137 is connected to the active circuit. The first protection layer 133 and the second protection layer 135 are respectively connected to the connector 137 through a wire 139, and are connected to the active circuit through the connector 137. In this embodiment, the first protection layer 133 and the second protection layer 135 are connected to the active circuit through the connector 137, and when a user receives an alarm prompt and checks that the protection plate 13 is seriously deformed, the protection plate 13 can be quickly replaced by plugging in and unplugging the connector 137, so that the operation is simple and quick. The connector 137 may be, but is not limited to, a connector having a pair of Pin pins, which is not limited to this.

Referring to fig. 5, in the embodiment of the present application, the buffer layer 131 specifically includes a frame region 1312 located at a peripheral edge thereof, and a grid region 1314 located within the frame region 1312.

The border region 1312 is used for sealing and connecting the first protective layer 133 and the second protective layer 135, so as to prevent impurities from entering the protective plate 13. Optionally, in an embodiment of the present application, the border region 1312 may be formed by one or more of a screw connection, a snap connection, and an adhesive connection to hermetically connect the first protective layer 133 and the second protective layer 135. Preferably, referring to fig. 5 in combination with fig. 3 and 4, in an embodiment of the present application, a plurality of first through holes are formed in the frame area 1312 along a circumferential direction, a plurality of second through holes are respectively formed in the first protective layer 133 and the second protective layer 135 corresponding to the plurality of first through holes of the frame area 1312, when the first protective layer 133, the buffer layer 131 and the second protective layer 135 are stacked, the plurality of first through holes of the frame area 1312 and the plurality of second through holes of the first protective layer 133 and the second protective layer 135 are correspondingly communicated, and a screw is inserted into each of the plurality of first through holes and the plurality of second through holes correspondingly communicated, so that the first protective layer 133, the buffer layer 131 and the second protective layer 135 are hermetically connected together by the plurality of screws; preferably, sealing glue is filled between the frame region 1312 of the buffer layer 131 and the first protective layer 133, and between the frame region 1312 of the buffer layer 131 and the second protective layer 135, so as to further improve the sealing property between the first protective layer 133, the buffer layer 131 and the second protective layer 135.

Referring to fig. 5 again in combination with fig. 6, in the embodiment of the present application, the grid area 1314 includes a plurality of buffer units 1316 connected to each other, each of the buffer units 1316 is formed by enclosing supporting ribs 1318 with a thickness smaller than a preset value, and the enclosed space enclosed by the supporting ribs 1318 forms the buffer gap.

It is understood that the smaller the thickness of the support ribs 1318 (i.e., the dimension of the support ribs 1318 in the direction parallel to the first protective layer 133), the smaller the support capability of the support ribs 1318 in the direction perpendicular to the first protective layer 133, the easier the support ribs 1318 are crushed; conversely, the greater the thickness of the support ribs 1318, the greater the support capacity of the support ribs 1318. In the embodiment of the application, through reasonable setting the thickness of brace 1318, can make brace 1318 have certain supporting capacity, brace 1318 can be in take place to warp under the extrusion of first inoxidizing coating 133 and offset the partial extrusion force of first inoxidizing coating 133, thereby absorb the collision energy that automobile body 3 bottom received and prevent guard plate 13 seriously warp, simultaneously, brace 1318 can not be too thick and produce too big supporting capacity, avoid first inoxidizing coating 133 can not to second inoxidizing coating 135 warp to with second inoxidizing coating 135 contacts, lead to active circuit can not switch on and trigger alarm device reports to the police. The specific thickness of the support rib 1318 may be set according to actual needs, and may be, for example, 1mm, 2mm, 3mm, or other reasonable thickness values, which is not limited herein.

Furthermore, it can be understood that the supporting capability of the grid section 1314 in the direction perpendicular to the first protective layer 133 is not only related to the thickness of the supporting ribs 1318 of the individual buffer cells 1316, but also related to the number of buffer cells 1316. When the thickness of the supporting rib 1318 is fixed, the supporting capability of the whole grid area 1314 is in direct proportion to the number of the buffering units 1316, so the number of the buffering units 1316 may be reasonably set, which is not described herein.

As shown in fig. 6, in one embodiment of the present application, the cross-sectional shape of the buffer unit 1316 is rectangular, and the grid area 1314 is formed by connecting a plurality of rectangular buffer units 1316 distributed in a matrix. Referring to fig. 7, in another embodiment of the present application, the cross-sectional shape of the buffer cells 1316 may be a polygon (such as, but not limited to, a hexagon as shown in fig. 7), and the grid area 1314 is formed by connecting a plurality of polygonal buffer cells 1316 distributed in a matrix. Referring to fig. 8, in another embodiment of the present application, the cross-sectional shape of the buffer unit 1316 may also be circular, and the grid 1314 is formed by connecting a plurality of circular buffer units 1316 distributed in a matrix. Of course, in other embodiments of the present application, the cross-sectional shape of the buffer unit 1316 may also be oval or have other shapes with a hollow cavity. In the above embodiment, the grid unit 1314 is formed by connecting a plurality of single-shaped buffer units 1316 distributed in a matrix. Obviously, in other embodiments of the present application, the mesh region 1314 may be formed by connecting the buffer cells 1316 having various shapes, such as a rectangle, a circle, a polygon, and an ellipse, without limitation.

Referring to fig. 9 in combination with fig. 4, in the embodiment of the present application, the first protection layer 133 is preferably a protection layer made of a metal plate, and the plate-shaped first protection layer 133 has a better anti-extrusion capability. Preferably, a side of the first protective layer 133 close to the buffering layer 131 and/or a side of the first protective layer 133 far from the buffering layer 131 is provided with a reinforcing structure 1332, and the reinforcing structure 1332 comprises protrusions and/or reinforcing ribs. It is understood that by providing the reinforcing structure 1332 on at least one side of the first protective layer 133, the structural strength of the first protective layer 133 may be improved, thereby further improving the deformation resistance of the first protective layer 133.

Specifically, as shown in fig. 9, in one embodiment of the present application, a plurality of the reinforcing structures 1332 are disposed on a side of the first protective layer 133 away from the buffer layer 131, a portion of the first protective layer 133 corresponding to each of the reinforcing structures 1332 may be recessed by stamping to form a strip-shaped reinforcing rib in a direction away from the buffer layer 131, each of the strip-shaped reinforcing ribs correspondingly forms one of the reinforcing structures 1332, wherein each of the strip-shaped reinforcing ribs protrudes from a surface of the first protective layer 133 on a side away from the buffer layer 131, and the plurality of strip-shaped reinforcing ribs extend in a direction parallel to the first protective layer 133.

In other embodiments, the first protection layer 133 may also be formed by stamping a plurality of ribs arranged in a matrix of rows and columns in a direction parallel to the first protection layer 133 to form a plurality of the reinforcement structures 1332, which may also improve the deformation resistance of the first protection layer 133.

In other embodiments, a plurality of protrusions may be directly protruded on either side surface of the first protection layer 133 to form a plurality of the reinforcement structures 1332, and the deformation resistance of the first protection layer 133 may also be improved. The cross-sectional shape of the protrusion may be one or more of a circle, a rectangle, a polygon and an ellipse, which is not limited.

Referring to fig. 9 again, in the embodiment of the present application, the second protection layer 135 may be a conductive film or a conductive plate, as long as the second protection layer 135 can contact with the first protection layer 133 deformed by being pressed to conduct the active circuit to trigger the alarm device to alarm. Preferably, in one embodiment of the present application, the second protection layer 135 is a conductive film with a light weight, which is beneficial to reduce the overall weight of the protection plate 13, so as to reduce the load of the electric vehicle.

Further preferably, referring to fig. 10 in combination with fig. 3, in an embodiment of the present application, a first contact bump 1334 is disposed at a position, corresponding to a buffering gap of at least one of the buffering units 1316 (i.e., a shielding space surrounded by the supporting ribs 1318 of the buffering units 1316), of one side of the first protection layer 133 facing the buffering layer 131, a second contact bump 1354 is disposed at a position, corresponding to the buffering gap of at least one of the buffering units 1316, of one side of the second protection layer 135 facing the buffering layer 131, and the first contact bump 1334 corresponds to the second contact bump 1354 one by one. Thus, when the bottom of the car body 3 is violently collided, the first protection layer 133 is deformed by the extrusion force from the bottom direction of the car body 3, the first protection layer 133 only needs to be close to the direction of the second protection layer 135 to generate a smaller deformation amount, so that at least one of the first contact bump 1334 and the corresponding second contact bump 1354 is in mutual contact, the active circuit is conducted more timely to trigger the alarm device to give an alarm, the alarm device is triggered after the first protection layer 133 is seriously deformed to give an alarm, and the risk that the battery is extruded and damaged is reduced.

On a side of the first protective layer 133 facing the buffer layer 131, the first contact bump 1334 may be disposed at a buffer gap corresponding to each buffer unit 1316, or the first contact bump 1334 may be disposed at a buffer gap corresponding to a part of the buffer unit 1316; accordingly, a side of the second protection layer 135 facing the buffer layer 131 is provided with a second contact bump 1354 corresponding to each first contact bump 1334 of the first protection layer 133.

In other embodiments of the present application, when the first protection layer 133 faces the side of the buffer layer 131 and is provided with a first contact bump 1334 at a buffering gap corresponding to at least one of the buffering units 1316, and the second protection layer 135 faces the side of the buffer layer 131 and is provided with a second contact bump 1354 at a buffering gap corresponding to at least one of the buffering units 1316, the first contact bump 1334 and the second contact bump 1354 may be staggered with each other, that is, the first contact bump 1334 may not correspond to the second contact bump 1354, and it may also satisfy that the first protection layer 133 only needs to deform slightly in a direction approaching the second protection layer 135, so that any one of the first contact bump 1334 and the second protection layer 135 of the first protection layer 133 may contact each other, or any one of the first protection layer 133 and the second contact bump 1354 of the second protection layer 135 may contact each other, and then the active circuit is conducted in time to trigger the alarm device to alarm.

It can be understood that, in other embodiments of the present application, only one side of the protection plate 13 facing the buffer layer 131, corresponding to a buffer gap of at least one of the buffer units 1316, is provided with a first contact bump 1334, and it can also be satisfied that the first protection layer 133 only needs to deform slightly in a direction close to the second protection layer 135, so that any one of the first contact bump 1334 of the first protection layer 133 and the second protection layer 135 can contact each other, and the active circuit is timely turned on to trigger the alarm device to alarm.

In other embodiments of the present application, the protection plate 13 may only have one side of the second protection layer 135 facing the buffer layer 131 corresponding to at least one of the buffer gaps of the buffer unit 1316 is provided with a second contact bump 1354, and also may satisfy that the first protection layer 133 only needs to generate a smaller deformation amount in a direction close to the second protection layer 135, so that any one of the second contact bump 1354 of the second protection layer 135 and the first protection layer 133 may contact each other, and then the active circuit is timely turned on to trigger the alarm device to alarm.

In any of the above embodiments, the cross-sectional shapes of the first contact bump 1334 and the second contact bump 1354 may be at least one of a circle, a rectangle, a polygon and an ellipse, and the first contact bump 1334 and the second contact bump 1354 may be a pillar bump or a tube bump, which is not limited thereto.

It should be noted that, in any of the above embodiments, the protection plate 13 includes the buffer layer 131, and the first protection layer 133 and the second protection layer 135 are disposed on opposite sides of the buffer layer 131. In other embodiments of the present application, when the bottom plate 11 of the battery tray is made of a conductive material, the present application may further provide a protection plate 13 of another structure, the protection plate 13 may not be provided with the second protection layer 135, and the first protection layer 133 and the bottom plate 11 are configured to contact with each other when the first protection layer 133 is pressed in the direction of the bottom of the vehicle body 3, so as to switch on the active circuit to trigger the alarm device to alarm. Thus, the second protection layer 135 is omitted from the protection plate 13, so that the structure can be simplified, the manufacturing cost can be reduced, and the whole weight of the protection plate 13 and the load of the electric vehicle can be reduced.

Specifically, referring to fig. 11, in another embodiment of the present application, the protection plate 13 includes a buffer layer 131 disposed on one side of the bottom plate 11 of the battery tray, and a first protection layer 133 disposed on one side of the buffer layer 131 far from the bottom plate 11. Wherein the buffer layer 131 is made of an insulating material and has a buffer gap; both the base plate 11 and the first protective layer 133 are made of electrically conductive material and are connected to an active circuit (not shown) comprising an alarm device (not shown).

It is understood that in a normal state (i.e. the bottom of the vehicle body 3 is not pressed by a foreign object collision), the first protective layer 133 and the bottom plate 11 are insulated and isolated by the buffer layer 131, so that the active circuit is in an open state, and the alarm device is not triggered; when the bottom of the vehicle body 3 is subjected to more serious collision extrusion to generate larger extrusion force, the protection plate 13 is also subjected to more serious collision extrusion in the direction away from one side of the bottom plate 11, the protection plate 13 deforms in the direction close to the bottom plate 11 under the action of the extrusion force, so that the first protection layer 133 can extrude the buffer layer 131 and gradually approaches the bottom plate 11, when the first protection layer 133 deforms seriously, the first protection layer 133 is in mutual contact with the bottom plate 11 at the buffer gap corresponding to the buffer layer 131, and at the moment, the first protection layer 133 is conducted with the bottom plate 11 to enable the active circuit to be in a closed state, so that the alarm device is triggered to give an alarm. So, under alarm device's the warning suggestion, can in time remind the user to inspect the maintenance guard plate 13 avoids first inoxidizing coating 133 leads to when receiving the extrusion once more bottom plate 11 also takes place serious deformation and harm battery in the battery tray is favorable to improving the security of battery.

Preferably, as shown in fig. 11, in another embodiment of the present application, the protection plate 13 further comprises a connector 137, and the connector 137 is connected in the active circuit. The first protective layer 133 and the bottom plate 11 are respectively connected to the connector 137 through a wire 139, and are connected to the active circuit through the connector 137. In this embodiment, the first protection layer 133 and the bottom plate 11 are connected to the active circuit through the connector 137, when a user receives an alarm prompt and checks that the protection plate 13 is seriously deformed, the battery pack 1 can be quickly detached from the bottom of the vehicle body 3 by plugging in and out the connector 137, so that the operation is simple and fast, and the protection plate 13 is more convenient to repair or replace. The connector 137 may be, but is not limited to, a connector with a pair of Pin pins, which is not limited to this.

For specific structures of the buffer layer 131 and the first protection layer 133, reference may be made to the related descriptions of the buffer layer 131 and the first protection layer 133 in the foregoing embodiments, and details are not repeated herein.

It should be noted that, in another embodiment of the present application, similar to the second protection layer 135 in the previous embodiment, a second contact bump may also be disposed at a buffer gap corresponding to at least one buffer unit 1316 on one side of the bottom plate 11 facing the buffer layer 131, so that the first protection layer 133 only needs to deform a small amount in a direction close to the bottom plate 11, and then any one of the second contact bumps 1354 on the bottom plate 11 and the first protection layer 133 or the first contact bump 1334 correspondingly disposed on the first protection layer 133 may contact each other, so as to timely turn on the active circuit to trigger the alarm device to alarm, thereby avoiding triggering the alarm device to alarm after the first protection layer 133 deforms seriously, and reducing the risk that the battery is damaged by being crushed. The protection plate 13 further has other structures and functions of the protection plate 13 in any of the embodiments, and for more details, reference may be made to the related description of the protection plate 13, which is not described herein again.

In summary, the protection plate 13 provided in the embodiment of the present application includes at least a buffer layer 131 made of an insulating material and a first protection layer 133 made of a conductive material, when the base plate 11 is made of a conductive material or the shielding plate 13 further includes a second shielding layer 135 made of a conductive material, the buffer layer 131 has a buffer gap for separating the first shield layer 133 from the bottom plate 11 or the second shield layer 135 at normal state, when the shielding plate 13 is pressed by a severe impact in a direction away from one side of the battery tray, the first protective layer 133 can press the buffer layer 131 and further contact with the bottom plate 11 or the second protective layer 135 at a buffer gap corresponding to the buffer layer 131, therefore, the active circuit where the active circuit is located is conducted, and the alarm device in the active circuit is triggered to give an alarm. So, can in time remind the user to inspect the maintenance guard plate 13, avoid first inoxidizing coating 133 receives the damage when extrudeing once more battery in the battery tray is favorable to improving the security of battery.

Further, this application embodiment still provides a battery package 1, battery package 1 includes the battery tray that has bottom plate 11, the battery and protection plate 13 as in any one embodiment above, the battery with protection plate 13 is installed respectively in the opposite sides of battery tray.

According to this application embodiment provide battery package 1, through battery tray keeps away from one side of battery sets up the mention of above-mentioned arbitrary embodiment guard plate 13 can in time remind the user to inspect the maintenance guard plate 13 avoids guard plate 13 receives the damage when extrudeing once more in the battery tray the battery is favorable to improving the security of battery.

Further, the embodiment of the present application also provides an electric vehicle, the electric vehicle includes the above-mentioned battery pack 1, the battery pack 1 is disposed at the bottom of a vehicle body 3 of the electric vehicle.

According to the embodiment of the application provide electric vehicle, through one side that the battery was kept away from to the battery tray of battery package 1 sets up the mention of above-mentioned arbitrary embodiment guard plate 13, can in time remind the user to inspect the maintenance guard plate 13 avoids guard plate 13 receives the damage when extrudeing once more battery in the battery tray is favorable to improving the security of battery.

In the description of the present application, reference to the description of the terms "embodiment," "particular embodiment," "example," 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 present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A protection plate for being mounted at one side of a battery tray, the protection plate comprising:

a buffer layer made of an insulating material and having a buffer gap;

2. The fender of claim 1 further comprising a connector, wherein the connector is connected to the active circuit; the first protective layer and the second protective layer are respectively connected to the connector and are connected to the active circuit through the connector.

3. The fender of claim 1 or 2, wherein the cushioning layer comprises a border region and a mesh region located within the border region; the frame area is used for connecting the first protective layer and the second protective layer in a sealing mode; the grid area comprises a plurality of buffer units which are connected with each other, each buffer unit is formed by enclosing supporting ribs with the thickness smaller than a preset value, and the enclosed spaces enclosed by the supporting ribs form the buffer gaps;

4. The fender of claim 3, wherein the first fender layer is provided with a reinforcing structure on one side close to the buffer layer and/or one side far away from the buffer layer, and the reinforcing structure comprises a bulge and/or a reinforcing rib;

and/or a first contact bump is arranged at the buffer gap corresponding to at least one buffer unit on one side of the first protective layer facing the buffer layer;

and/or a second contact bump is arranged at the position, corresponding to the buffer gap of at least one buffer unit, of one side, facing the buffer layer, of the second protective layer.

5. A protection plate for being installed at one side of a battery tray including a base plate for installing the protection plate, the protection plate comprising:

a buffer layer made of an insulating material and having a buffer gap;

6. The fender of claim 5, further comprising a connector, the connector being connected in the active circuit; the first protective layer and the bottom plate are respectively connected to the connectors and are connected to the active circuit through the connectors.

7. The fender of claim 5 or 6, wherein the cushioning layer comprises a border region and a mesh region located within the border region; the frame area is used for connecting the bottom plate and the first protective layer in a sealing mode; the grid area comprises a plurality of buffer units which are connected with each other, each buffer unit is formed by enclosing supporting ribs with the thickness smaller than a preset value, and the enclosed spaces enclosed by the supporting ribs form the buffer gaps;

8. The fender of claim 7, wherein the first fender layer is provided with a reinforcing structure on one side close to the buffer layer and/or one side far away from the buffer layer, and the reinforcing structure comprises a bulge and/or a reinforcing rib;

9. A battery pack comprising a battery tray, a battery, and the protective plate of any one of claims 1-8, wherein the battery and the protective plate are mounted on opposite sides of the battery tray, respectively.

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