CN115642363A - Protection plate subassembly, battery package and vehicle - Google Patents

Abstract

The embodiment of the application provides a protection plate component, a battery pack and a vehicle. This fender subassembly includes: a protection plate and a support pad; the protection plate is provided with a first surface, a second surface and a drainage channel; the first surface is opposite to the second surface and is used for facing and covering the battery unit; the first ports of the drainage channels are arranged on the first surface, the second ports of the drainage channels are arranged on the second surface, and the first ports are used for corresponding to the explosion-proof valves of the single batteries one by one; the support pad is arranged on the second surface and used for supporting the cover plate of the battery pack and enabling at least a partially open flow dispersing channel to be formed between the second surface of the protection plate and the cover plate. The embodiment of the application realizes dredging away harmful substances released by the explosion-proof valve of the battery in time, can effectively reduce the contact probability of the harmful substances with the surface of the battery or the related circuit devices of the battery module, further protects the circuit devices and ensures the effectiveness of the battery module.

Description

Protection plate subassembly, battery package and vehicle

Technical Field

The application relates to the technical field of power batteries, in particular to a protection plate component, a battery pack and a vehicle.

Background

The battery module usually includes a plurality of battery cells, is the important energy storage of new forms of energy vehicle, energy supply device. The battery cell is induced to thermal runaway under the conditions of overcharge, overdischarge, battery self abnormality and the like, namely, a large amount of heat is generated, and along with the sharp increase of the internal pressure of the battery cell, the internal pressure of the battery cell slightly causes the damage of a circuit device, and the internal pressure of the battery cell seriously causes safety accidents such as spontaneous combustion, even explosion and the like of the battery cell.

For the security that improves battery module, be equipped with explosion-proof valve for battery monomer usually, explosion-proof valve can explode when battery monomer's heat or internal pressure accumulation reach certain degree in order to release pressure, is favorable to avoiding endangering further upgrading.

However, harmful substances are released from the explosion-proof valve, and specifically include one or more of high-temperature liquid (such as electrolyte), high-temperature gas (such as chemical reactant of lithium battery), high-temperature solid (such as isolating film, copper foil, aluminum foil), and high-temperature smoke (such as combustion particles), and these harmful substances may contact or attach to the surface of a battery cell or a related circuit device of a battery module, thereby inducing a failure of the circuit device, and further causing a failure or even an out of control of the battery module.

Disclosure of Invention

This application provides a guard plate subassembly, battery package and vehicle to the shortcoming of current mode for solve prior art and have the harmful substance that explosion-proof valve released and can induce the technical problem of circuit device trouble.

In a first aspect, embodiments of the present application provide a fender assembly comprising: a protection plate and a support pad;

the protection plate is provided with a first surface, a second surface and a drainage channel;

the first surface is opposite to the second surface and is used for facing and covering the battery unit;

the first ports of the drainage channels are arranged on the first surface, the second ports of the drainage channels are arranged on the second surface, and the first ports are used for corresponding to the explosion-proof valves of the single batteries one by one;

the support pad is arranged on the second surface and used for supporting the cover plate of the battery pack and enabling an at least partially open diffusion channel to be formed between the second surface of the protection plate and the cover plate.

In some embodiments, at least a portion of the first face about the first port is adapted to contact the battery cell such that a sealed channel is formed between the first port and the explosion-proof valve.

In some embodiments, the protection plate further has an accommodating groove with an opening formed in the first surface, and the accommodating groove is used for accommodating the electrical connection structure between the battery cells;

at least a portion of the first surface, which is located at least around the opening of the receiving groove, is used for contacting the battery cell to isolate the receiving groove from the explosion-proof valve.

In some embodiments, the guard plate has a reinforcing edge; the reinforcing edge extends along the edge of the first surface in the direction away from the second surface; the reinforcing edge and the first surface enclose a space for accommodating part of the battery cells.

In some embodiments, the opposite ends of the protection plate have connection lugs for detachable connection with the end plates of the battery pack.

In some embodiments, the cross section of the support pad is any one or more of circular, oval, quasi-circular, rectangular, square, trapezoidal and polygonal.

In some embodiments, the support pad is bonded to the second face.

In some embodiments, the fender assembly further comprises: a protective film;

the protective film covers at least part of the second port of the drainage channel;

the melting point of the protective film is not higher than the opening temperature of the explosion-proof valve.

In some embodiments, the protective film is characterized by at least one of the following:

the thickness of the protective film is not less than 0.05 mm and not more than 0.2 mm;

the protective film is made of an insulating material;

each protective film covers the corresponding at least two second ports;

each of the shield films covers a corresponding one of the second ports.

In a second aspect, embodiments of the present application provide a cover plate, at least one battery cell, and a fender assembly as provided in the first aspect;

the first ports of the drainage channels in the protection plate component correspond to the explosion-proof valves of the battery monomers one by one;

the support pads in the shroud assembly support a cover plate of the battery pack and provide an at least partially open diffuser passage between the second face of the shroud and the cover plate.

In some embodiments, at least a portion of the first face of the guard plate around the first port contacts the battery cell such that a sealed passage is formed between the first port and the explosion-proof valve.

In some embodiments, the battery pack further comprises: the electric connection structure and the busbar;

the electric connection structure is respectively and electrically connected with the at least two battery monomers, and/or the electric connection structure is respectively and electrically connected with the at least one battery monomer and the busbar;

the electric connection structure is accommodated in the accommodating groove of the protection plate, and at least the part, located around the opening of the accommodating groove, of the first surface of the protection plate is in contact with the battery monomer, so that the accommodating groove is isolated from the explosion-proof valve.

In some embodiments, the electrical connection structure is a flexible circuit board.

In some embodiments, the battery pack further comprises: an end plate; the end plates are connected to opposite sides of the whole body formed by all the battery cells and detachably connected to the connection lug plates of the protection plates.

In a third aspect, an embodiment of the present application provides a vehicle, including: the fender assembly as provided in the first aspect; or, a battery pack as provided in the second aspect.

The beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise: the drainage channel of the protection plate can timely guide harmful substances released by the explosion-proof valve of the battery monomer to the second surface of the protection plate far away from the battery monomer, so that the probability of the contact of the harmful substances released by the explosion-proof valve with the surface of the battery monomer or related circuit devices of the battery module can be effectively reduced, the circuit devices are protected, and the effectiveness of the battery module is guaranteed; the supporting relation between the apron of guard plate and battery package can be established to the supporting pad to can be so that form at least partly open scattered flow passageway between the second face of guard plate and the apron, this scattered flow passageway is favorable to the evacuation of the harmful substance that drainage channel's second port was derived, avoids the harmful substance that explosion-proof valve released to block up in drainage channel's second port department, improves the mediation ability of guard plate.

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

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a first implementation manner of a protection plate assembly provided in an embodiment of the present application;

FIG. 2 isbase:Sub>A schematic sectional view taken along the line A-A in FIG. 1;

fig. 3 is a schematic structural diagram of a second implementation of a protection plate assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view taken along the plane B-B in FIG. 3;

FIG. 5 is a schematic structural view of a third embodiment of a fender assembly according to the examples provided herein;

FIG. 6 is a schematic cross-sectional view taken along plane C-C in FIG. 5;

fig. 7 is a schematic structural diagram of a first implementation of a battery pack according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a second implementation of a battery pack provided in an example of the present application;

FIG. 9 is a schematic cross-sectional view of the plane D-D in FIG. 8;

fig. 10 is an exploded view of a second embodiment of a battery pack according to an example of the present application.

In the figure:

100-a fender assembly;

110-protection plate; 111-a first side; 112-a second face; 113-a drainage channel; 113 a-a first port; 113 b-a second port;

114-a diffusion channel; 115-a reinforcing edge; 116-connecting ear plate;

120-a support pad; 130-a protective film;

200-a battery pack;

210-a battery cell; 211-explosion-proof valve;

220-an end plate; 230-bus bar; 240-flexible circuit board.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is unnecessary for the features of the present application shown, it is omitted. 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.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, and/or components, but do not preclude the presence or addition of one or more other features, integers, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The inventor of this application researches and discovers, does not have the harmful substance to the explosion-proof valve release among the current battery module to carry out the structure of guiding, after explosion-proof valve explodes, harmful substance can be at the free outside random diffusion of battery, very easily contacts or on being attached to the free surface of battery or the relevant circuit device of battery module, induces circuit device trouble, and then leads to battery module inefficacy even out of control.

The related circuit device of the battery module may include: various wire harnesses, BMS (battery management system), and the like.

The application provides a protection plate subassembly, battery package and vehicle aims at solving prior art technical problem as above.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.

The embodiment of the present application provides a fender assembly 100, and the structural schematic diagram of the fender assembly 100 is shown in fig. 1 and fig. 2, and includes: a guard plate 110 and a support pad 120.

The guard plate 110 has a first face 111, a second face 112, and a drainage channel 113.

The first surface 111 is opposite to the second surface 112, and the first surface 111 faces and covers the battery cell 210.

The first port 113a of the drainage channel 113 is opened on the first surface 111, the second port 113b of the drainage channel 113 is opened on the second surface 112, and the first ports 113a are in one-to-one correspondence with the explosion-proof valves 211 of the battery cells 210.

The supporting pad 120 is disposed on the second surface 112 and is used for supporting the cover plate of the battery pack 200, and forming an at least partially open diffusion passage 114 between the second surface 112 of the protection plate 110 and the cover plate.

In this embodiment, the drainage channel 113 of the protection plate 110 can timely guide the harmful substances released by the explosion-proof valve 211 of the battery cell 210 to the second surface 112 of the protection plate 110 far away from the battery cell 210, so that the probability of the contact between the harmful substances released by the explosion-proof valve 211 and the surface of the battery cell 210 or the related circuit devices of the battery module can be effectively reduced, the circuit devices are further protected, and the effectiveness of the battery module is ensured.

The support pad 120 may establish a supporting relationship between the protection plate 110 and the cover plate of the battery pack 200, and may form an at least partially open diffusion channel 114 between the second surface 112 of the protection plate 110 and the cover plate, where the diffusion channel 114 facilitates evacuation of the harmful substances discharged from the second port 113b of the drainage channel 113, and prevents the harmful substances released from the explosion-proof valve 211 from being blocked at the second port 113b of the drainage channel 113, thereby improving the dredging capability of the protection plate 110.

In some embodiments, the first port 113a and the second port 113b of the diversion channel 113 are in a one-to-one correspondence, i.e., one diversion channel 113 has only one first port 113a and one second port 113b.

In some embodiments, the first port 113a and the second port 113b of the diversion channel 113 are many-to-one, i.e., one diversion channel 113 may have two or more first ports 113a, and the two or more first ports 113a are all connected to the same second port 113b.

In some embodiments, the first port 113a and the second port 113b of the flow guiding channel 113 are many-to-many, i.e., two or more first ports 113a are collected in the shielding plate 110 and then communicate with two or more second ports 113b.

In some embodiments, the protection plate 110 may be made of mica, which can endure thermal shock of a high temperature medium. Alternatively, the shielding plate 110 may be formed by hot press molding the mica plate and then machining the mica plate.

In some embodiments, the thickness of the protection plate 110 is not less than 0.5 mm and not more than 3 mm, which can save space and facilitate the volume reduction of the battery pack 200 including the protection plate 110.

The inventors consider that the structure of the first face 111 of the protection plate 110 affects the connection relationship between the protection plate 110 and the explosion-proof valve 211 of the battery cell 210, and affects the escape rate of the harmful material emitted from the explosion-proof valve 211. The escape rate is the percentage of the amount of the harmful material that does not enter the drainage channel 113 to the total amount of the harmful material that is released, and the "amount" herein may be a mass or a molar amount. To this end, the present application provides the following three possible embodiments for the guard plate 110:

in a first possible embodiment, as shown in fig. 2, at least a portion of the first face 111 around the first port 113a is configured to contact the battery cell 210, so that a sealed passage is formed between the first port 113a and the explosion-proof valve 211.

In this embodiment, at least a portion of the first surface 111 around the first port 113a is configured to contact the battery cell 210, which is beneficial to restrict a possible escape space between the explosion-proof valve 211 and the first port 113a of the drainage channel 113, and a sealed channel formed between the first port 113a and the explosion-proof valve 211 is beneficial to reduce an escape rate of a harmful substance released by the explosion-proof valve 211, and improve a guiding effect of the drainage channel 113.

In a second possible embodiment, the protection plate 110 further has a receiving groove (not shown) opened on the first surface 111, and the receiving groove is used for receiving an electrical connection structure between the battery cells 210. At least a portion of the first face 111 around the opening of the receiving groove is adapted to contact the battery cell 210 to isolate the receiving groove from the explosion-proof valve 211.

In this embodiment, the holding tank can realize holding, the parcel to the electric connection structure between each battery monomer 210 to the part that lies in around the holding tank opening at least of first face 111 contacts with battery monomer 210, can realize keeping apart explosion-proof valve 211 outside the holding tank, makes even if the harmful substance of escape also can not contact the relevant circuit device of battery module, and then protection circuit device guarantees the validity of battery module.

In a third possible embodiment, the protection plate 110 further has a receiving groove with an opening formed on the first surface 111, and the receiving groove is used for receiving an electrical connection structure between the battery cells 210. The first face 111 is adapted to contact the battery cell 210 such that a sealed passage is formed between the first port 113a and the explosion-proof valve 211, and the receiving groove is isolated from the explosion-proof valve 211.

In this embodiment, after the first surface 111 contacts the battery cell 210, not only the sealed channel between the first port 113a and the explosion-proof valve 211 can be formed, but also the accommodating groove can be isolated from the explosion-proof valve 211, so that this embodiment has the beneficial effects of the first possible embodiment and the second possible embodiment, which are not described herein again.

The inventors consider that the protection plate 110 may be thinned to reduce the space occupation of the battery module, but the thinning of the protection plate 110 may cause a defect of insufficient rigidity; in addition, the harmful substances released by the explosion-proof valve 211 may pass through the edge of the diffusion channel 114 between the second surface 112 of the protection plate 110 and the cover plate, and then return to the space between the first surface 111 of the protection plate 110 and the battery cell 210, and easily contact or adhere to the surface of the battery cell 210 or related circuit devices of the battery module, thereby inducing the circuit device to malfunction, and further causing the battery module to fail or even to be out of control. To this end, the present application provides one possible implementation of the following for the guard plate 110:

as shown in fig. 3 to 6, the protection plate 110 provided in the present embodiment has a reinforcing edge 115. The reinforcing edge 115 extends along the edge of the first face 111 in a direction away from the second face 112. The reinforcing edge 115 and the first surface 111 enclose a space for accommodating a part of the battery cells 210.

In this embodiment, the reinforcing edge 115 of the protection plate 110 can reinforce the rigidity of the protection plate 110, which is beneficial to thinning the protection plate 110, so as to reduce the space occupation of the battery module. Moreover, the reinforcing edge 115 and the first surface 111 enclose a space for accommodating a part of the battery cells 210, that is, the reinforcing edge 115 can shield the space possibly existing between the first surface 111 of the protection plate 110 and the battery cells 210 to a certain extent, which is beneficial to reducing the probability that harmful substances released by the explosion-proof valve 211 may return to the space possibly existing between the first surface 111 of the protection plate 110 and the battery cells 210 again through the edge of the diffusion channel 114 between the second surface 112 of the protection plate 110 and the cover plate, and further enhancing the protection of the related circuit devices of the battery module.

The inventors have considered that the sheathing plate assembly 100 needs to be stably connected to the battery module during use, and the manner of attaching and detaching the sheathing plate assembly 100 affects the convenience of maintenance of the entire battery pack 200. To this end, the present application provides one possible embodiment for the fender 110:

as shown in fig. 3 and 5, the present embodiment provides the protection plate 110 having the coupling lugs 116 at opposite ends thereof, and the coupling lugs 116 are detachably coupled to the end plate 220 of the battery pack 200.

In the present embodiment, the detachable connection between the connection ear plate 116 and the end plate 220 of the battery pack 200 is used to improve the convenience of maintenance of the fender assembly 100.

In some embodiments, the connection lug plate 116 and the end plate 220 of the battery pack 200 may be connected by a bolt and a nut, or may be connected by a plug.

The inventors contemplate that the support pads 120 may be required to establish a supporting relationship between the protection plate 110 and the cover plate of the battery pack 200 and may allow the at least partially open diffuser passage 114 to be formed between the second face 112 of the protection plate 110 and the cover plate. To this end, the present application provides two possible embodiments for the fender 110:

in a first possible embodiment, the axial cross section of the support pad 120 is any one or more of circular, oval, quasi-circular, rectangular, square, trapezoid, and polygonal. The support pads 120 may have different axial cross-sections to facilitate the flow-directing requirements of the corresponding flow-dispersing channel 114.

In a second possible embodiment, the support pad 120 is bonded to the second side 112. In one aspect, the bonding may allow for a stable connection between the support pad 120 and the second face 112 of the guard plate 110; on the other hand, the adhesion also facilitates removal of the support pad 120, even if maintenance operations such as replacement of the support pad 120 are performed.

The inventor considers that foreign matters such as dust may fall into the drainage channel 113 of the protection plate 110, and even adhere to the explosion-proof valve 211 after passing through the drainage channel 113, and when the foreign matters such as dust are accumulated to a certain degree, the drainage channel 113 may be blocked, and even the explosion-proof valve 211 may not be normally opened, so that the safety protection of the battery module is disabled. To this end, the present application provides one possible embodiment for the fender 110:

as shown in fig. 5 and 6, the fender assembly 100 provided in the present embodiment further includes: a protective film 130.

The shielding film 130 covers at least a part of the second port 113b of the drainage channel 113.

The melting point of the shielding film 130 is not higher than the opening temperature of the explosion-proof valve 211.

In this embodiment, the protective film 130 covers at least a portion of the second port 113b of the drainage channel 113, which can be beneficial to preventing external foreign matters from falling into the drainage channel 113, so as to ensure the smoothness of the drainage channel 113 and ensure that the explosion-proof valve 211 is in a normal working state. The melting point of the protective film 130 is not higher than the opening temperature of the explosion-proof valve 211, so that the protective film 130 can be melted at the first time after contacting (high-temperature) harmful substances released by the explosion-proof valve 211, and the harmful substances can be continuously evacuated outwards (such as the diffusion channel 114 between the second surface 112 of the protective plate 110 and the cover plate), thereby ensuring the necessary pressure relief of the battery cell 210.

In some embodiments, the thickness of the protective film 130 is not less than 0.05 millimeters, and not greater than 0.2 millimeters. This is beneficial to the protective film 130 to have certain strength of blocking foreign matters such as dust, and simultaneously, improves the melting speed of the protective film 130, and reduces the short-time blocking influence possibly brought to the drainage channel 113 due to the melting stage of the protective film 130.

In some embodiments, the protective film 130 is an insulating material. This may be advantageous to reduce the accumulation of foreign matter due to static electricity.

In some embodiments, each shielding film 130 covers the corresponding at least two second ports 113b. The protective film 130 may be attached to the second surface 112 of the guard plate 110 at this time.

In some embodiments, each protective membrane 130 covers a corresponding one of the second ports 113b. At this time, the protective film 130 may be attached to the second surface 112 of the protective plate 110, or may be disposed in the drainage channel 113.

Based on the same inventive concept, the embodiment of the present application provides a battery pack 200, and the structural schematic diagram of the battery pack 200 is shown in fig. 7 to 10, and includes: a cover plate (not shown), at least one battery cell 210, and any of the fender assemblies 100 as provided in the previous embodiments.

The first ports 113a of the drainage channels 113 in the sheathing plate assembly 100 correspond one-to-one to the explosion-proof valves 211 of the battery cells 210.

The support pads 120 in the fender assembly 100 support the cover plate of the battery pack 200 and provide at least partially open diffuser passages 114 between the second face 112 of the fender 110 and the cover plate.

In this embodiment, the cover plate of the battery pack 200 can protect the battery cells 210, and the side of the battery cells 210 provided with the explosion-proof valve 211 faces the cover plate.

The drainage channel 113 of guard plate 110 can guide the harmful substance of the explosion-proof valve 211 release of battery cell 210 to the second face 112 that the guard plate 110 kept away from battery cell 210 in time, can effectively reduce the probability of the harmful substance that explosion-proof valve 211 released and battery cell 210's surface or the relevant circuit device contact of battery module, and then protection circuit device, guarantee the validity of battery module.

The support pad 120 may establish a supporting relationship between the protection plate 110 and the cover plate of the battery pack 200, and may form an at least partially open diffusion channel 114 between the second surface 112 of the protection plate 110 and the cover plate, where the diffusion channel 114 facilitates evacuation of the harmful substances discharged from the second port 113b of the drainage channel 113, and prevents the harmful substances released from the explosion-proof valve 211 from being blocked at the second port 113b of the drainage channel 113, thereby improving the dredging capability of the protection plate 110.

In some embodiments, at least a portion of the first face 111 of the protection plate 110 around the first port 113a is in contact with the battery cell 210 such that a sealed passage is formed between the first port 113a and the explosion proof valve 211.

In this embodiment, at least a portion of the first surface 111 around the first port 113a contacts the battery cell 210, which is beneficial to restrict a possible escape space between the explosion-proof valve 211 and the first port 113a of the drainage channel 113, and a sealed channel formed between the first port 113a and the explosion-proof valve 211 is beneficial to reduce an escape rate of a harmful substance released by the explosion-proof valve 211, and improve a guiding effect of the drainage channel 113.

In some embodiments, as shown in fig. 10, the battery pack 200 further includes: electrical connection structures and bus bars 230.

The electrical connection structures are electrically connected with at least two battery cells 210, respectively, and/or the electrical connection structures are electrically connected with at least one battery cell 210 and the busbar 230, respectively.

The electrical connection structure is received in the receiving groove of the protection plate 110, and at least a portion of the first surface 111 of the protection plate 110 around the opening of the receiving groove is in contact with the battery cell 210 to isolate the receiving groove from the explosion-proof valve 211.

In this embodiment, the holding tank can realize holding, the parcel to the electric connection structure between each battery monomer 210 to the part that lies in around the holding tank opening at least of first face 111 contacts with battery monomer 210, can realize keeping apart explosion-proof valve 211 outside the holding tank, makes even the harmful substance of escape also can not contact the relevant circuit device of battery module, and then the protection circuit device guarantees the validity of battery module.

In some embodiments, as shown in fig. 10, the electrical connection structure is a flexible circuit board 240.

In the present embodiment, compared to the conventional wire harness, the flexible circuit board 240 has the advantages of smaller occupied space, lighter weight, easier realization of automated production, and the like.

In some embodiments, the plane of the flexible circuit board 240 is perpendicular to the first surface 111, which facilitates the flexible circuit board 240 to be received and wrapped by the receiving slot on the protection plate 110.

In some embodiments, the battery pack 200 further includes: an end plate 220. The end plates 220 are coupled to opposite sides of the whole body formed of all the battery cells 210 and are detachably coupled to the coupling ear plates 116 of the guard plate 110.

Based on the same inventive concept, the embodiment of the application provides a vehicle, which comprises: any of the fender assemblies 100 as provided in the previous embodiments. Or, any of the battery packs 200 as provided in the previous embodiments.

In this embodiment, since the vehicle adopts any one of the fender assemblies 100 or any one of the battery packs 200 provided in the foregoing embodiments, the principle and technical effects thereof please refer to the foregoing embodiments, which are not described herein again.

In some embodiments, the vehicle may be a new energy automobile, or a new energy train, or the like.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

1. the drainage channel 113 of guard plate 110 can guide the harmful substance of the explosion-proof valve 211 release of battery cell 210 to the second face 112 that the guard plate 110 kept away from battery cell 210 in time, can effectively reduce the probability of the harmful substance that explosion-proof valve 211 released and battery cell 210's surface or the relevant circuit device contact of battery module, and then protection circuit device, guarantee the validity of battery module.

2. The support pad 120 may establish a supporting relationship between the protection plate 110 and the cover plate of the battery pack 200, and may form an at least partially open diffusion channel 114 between the second surface 112 of the protection plate 110 and the cover plate, where the diffusion channel 114 facilitates evacuation of the harmful substances discharged from the second port 113b of the drainage channel 113, and prevents the harmful substances released from the explosion-proof valve 211 from being blocked at the second port 113b of the drainage channel 113, thereby improving the dredging capability of the protection plate 110.

3. At least the portion of the first surface 111 around the first port 113a is configured to contact the battery cell 210, which is beneficial to restrict the size of an escape space that may exist between the explosion-proof valve 211 and the first port 113a of the drainage channel 113, and a sealed channel formed between the first port 113a and the explosion-proof valve 211 is beneficial to reduce the escape rate of harmful substances released by the explosion-proof valve 211 and improve the guiding effect of the drainage channel 113.

4. The holding tank can realize holding, the parcel to the electric connection structure between each battery monomer 210 to the part that lies in around the holding tank opening at least of first face 111 contacts with battery monomer 210, can realize keeping apart explosion-proof valve 211 outside the holding tank, makes even if the harmful substance of escape also can not contact the relevant circuit device of battery module, and then the protection circuit device guarantees the validity of battery module.

5. The reinforcing edge 115 of the protection plate 110 can reinforce the rigidity of the protection plate 110, and is beneficial to thinning the protection plate 110 so as to reduce the space occupation of the battery module. Moreover, the reinforcing edge 115 and the first surface 111 enclose a space for accommodating a part of the battery cells 210, that is, the reinforcing edge 115 can shield the space possibly existing between the first surface 111 of the protection plate 110 and the battery cells 210 to a certain extent, which is beneficial to reducing the probability that harmful substances released by the explosion-proof valve 211 may return to the space possibly existing between the first surface 111 of the protection plate 110 and the battery cells 210 again through the edge of the diffusion channel 114 between the second surface 112 of the protection plate 110 and the cover plate, and further enhancing the protection of the related circuit devices of the battery module.

6. The protective film 130 covers at least part of the second port 113b of the drainage channel 113, so that external foreign matters can be prevented from falling into the drainage channel 113, the smoothness of the drainage channel 113 is ensured, and the explosion-proof valve 211 is also ensured to be in a normal working state. The melting point of the protective film 130 is not higher than the opening temperature of the explosion-proof valve 211, which is beneficial for the protective film 130 to melt in the first time after contacting with the (high temperature) harmful substance released by the explosion-proof valve 211, so that the harmful substance can be continuously evacuated to the outside (such as the diffusion channel 114 between the second surface 112 of the protective plate 110 and the cover plate), and the necessary pressure relief of the battery cell 210 is ensured.

Those skilled in the art will understand that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims (12)

1. A fender assembly, comprising: a protection plate and a support pad;

the protection plate is provided with a first surface, a second surface and a drainage channel;

the first face is opposite to the second face, and the first face is used for facing and covering the battery unit;

a first port of the drainage channel is formed in the first surface, a second port of the drainage channel is formed in the second surface, and the first ports are used for corresponding to the explosion-proof valves of the single batteries one by one;

the supporting pad is arranged on the second surface and used for supporting a cover plate of the battery pack and enabling an at least partially open diffusion channel to be formed between the second surface of the protection plate and the cover plate.

2. The fender assembly of claim 1, wherein at least a portion of the first face about the first port is configured to contact the battery cell to form a sealed passageway between the first port and the explosion-proof valve.

3. The fender assembly of claim 1, wherein the fender further comprises a receiving groove having an opening formed in the first surface, the receiving groove configured to receive an electrical connection structure between the battery cells;

at least a portion of the first surface, which is located at least around the opening of the receiving groove, is used to contact the battery cell to isolate the receiving groove from the explosion-proof valve.

4. The fender assembly of claim 1, wherein the fender has a reinforcing edge; the reinforcing edge extends along the edge of the first face to the direction departing from the second face; the reinforcing edge and the first surface enclose a space for accommodating part of the battery monomer;

and/or the opposite two ends of the protection plate are provided with connecting lug plates which are detachably connected with the end plate of the battery pack.

5. The fender assembly of claim 1, wherein the support pad has an axial cross-section of any one or more of circular, elliptical, quasi-circular, rectangular, square, trapezoidal, polygonal;

and/or the support pad is bonded to the second face.

6. The fender assembly of any one of claims 1-5, wherein the fender assembly further comprises: a protective film;

the protective film covers at least part of the second port of the drainage channel;

the melting point of the protective film is not higher than the opening temperature of the explosion-proof valve.

7. The fender assembly of claim 6, wherein the fender membrane is characterized by at least one of:

the thickness of the protective film is not less than 0.05 mm and not more than 0.2 mm;

the protective film is made of an insulating material;

each protective film covers at least two corresponding second ports;

each of the protective films covers a corresponding one of the second ports.

8. A battery pack, comprising: a cover plate, at least one battery cell, and the fender assembly of any one of claims 1-7;

the first ports of the drainage channels in the protection plate assembly correspond to the explosion-proof valves of the single batteries one by one;

the support pads in the shroud assembly support a cover plate of a battery pack and provide an at least partially open diffuser passage between the second face of the shroud and the cover plate.

9. The battery pack of claim 8, wherein at least a portion of the first face of the protective plate around the first port contacts the battery cell to form a sealed passage between the first port and the explosion-proof valve.

10. The battery pack of claim 8, further comprising: the electric connection structure and the busbar;

the electric connection structure is electrically connected with at least two battery monomers respectively, and/or the electric connection structure is electrically connected with at least one battery monomer and the busbar respectively;

the electric connection structure is accommodated in the accommodating groove of the protection plate, and at least a portion of the first surface of the protection plate, which is located around the opening of the accommodating groove, is in contact with the battery cell, so that the accommodating groove is isolated from the explosion-proof valve.

11. The battery pack of claim 10, wherein the electrical connection structure is a flexible circuit board;

and/or, the battery pack further comprises: an end plate; the end plates are connected to opposite sides of the whole body formed by all the battery cells and detachably connected to the connection lug plates of the protection plates.

12. A vehicle, characterized by comprising: the fender assembly of any one of claims 1-7; or, a battery pack according to any one of claims 8-11.

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