CN113844247A

CN113844247A - Battery pack and electric vehicle

Info

Publication number: CN113844247A
Application number: CN202010515630.8A
Authority: CN
Inventors: 谭亮稳; 谭晶; 陈文会
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-12-28
Anticipated expiration: 2040-06-09
Also published as: CN113844247B

Abstract

The application discloses battery package and electric motor car, this battery package are installed on the automobile body of electric motor car for provide power, a serial communication port for the electric motor car, the battery package includes: a tray having an accommodation space with a top opening; the temperature equalizing plate is arranged at the opening at the top of the accommodating space; the sealing cover is positioned on the temperature equalizing plate and connected with the tray so as to seal the top opening, and a through hole is formed in the sealing cover; the connecting piece, the one end of connecting piece is fixed on the temperature-uniforming plate, the other end of connecting piece is followed the through-hole of sealed lid stretches out for with the body coupling of electric motor car, through above-mentioned mode, can improve battery package and body coupling's fastness, prevent that battery package from producing in the vehicle operation process and rocking and jolting.

Description

Battery pack and electric vehicle

Technical Field

The application relates to the field of batteries, in particular to a battery pack and an electric vehicle.

Background

The battery pack is used as a main power source of the new energy electric automobile, and the service performance and the safety performance of the electric automobile are directly influenced by the quality of the battery pack. In the battery pack structure, a tray is usually used to load the power battery, and the tray is sealed by a tray cover to form a battery pack, and then the battery pack is mounted on the electric vehicle. In the prior art, the tray is usually fixed to the body of the electric vehicle to mount the battery pack on the body of the electric vehicle, however, once the connection between the tray and the body is loosened, the battery pack is shaken and bumped during the operation of the vehicle, and the power battery in the battery pack is easily bumped to cause a safety accident.

Disclosure of Invention

This application aims at solving one of the technical problem that exists among the prior art at least, through providing a battery package, can improve battery package and automobile body connected's fastness, prevents that the battery package from producing at the vehicle operation in-process and rocking and jolting to improve the vibration mode of battery package.

For this reason, this application proposes a battery package, installs on the automobile body of electric motor car for provide power for the electric motor car, the battery package includes:

a tray having an accommodation space with a top opening;

the temperature equalizing plate is arranged at the opening at the top of the accommodating space;

the sealing cover is positioned on the temperature equalizing plate and connected with the tray so as to seal the top opening, and a through hole is formed in the sealing cover;

and one end of the connecting piece is fixed on the temperature equalizing plate, and the other end of the connecting piece extends out of the through hole of the sealing cover and is used for being connected with the body of the electric vehicle.

In the embodiment of the application, the connecting piece is a nut, and the nut is welded with the body of the electric vehicle.

In the embodiment of the application, the nut is sleeved with the sealing ring.

In an embodiment of the present application, the temperature-uniforming plate includes an inner surface facing the accommodating space and an outer surface opposite to the inner surface, a plurality of cooling pipes arranged in sequence are disposed on the outer surface of the temperature-uniforming plate, and a heating member is disposed between two adjacent cooling pipes;

the temperature equalizing plate comprises a bearing area for placing the cooling pipeline and the heating element and a connecting area except the bearing area, the thickness of the connecting area is greater than that of the bearing area, and the connecting element is fixed on the connecting area.

In an embodiment of the application, the battery pack further includes a plurality of single batteries placed in the accommodating space, the plurality of single batteries are sequentially arranged along a second direction, and the lengths of the single batteries extend along a first direction;

the inner surface of the temperature equalizing plate is bonded with the single battery through heat conducting structural glue.

In the embodiment of this application, be provided with the lug on the tray, the lug is used for with the tray is installed on the automobile body of electric motor car.

In an embodiment of the present application, the width of the tray extends along the first direction, the length of the tray extends along the second direction, the thickness of the tray extends along the third direction, and the top opening of the accommodating space is located on one side of the tray in the third direction;

the tray comprises two first boundary beams and two second boundary beams, the two first boundary beams are located on two opposite sides of the tray in the second direction, the two second boundary beams are located on two opposite sides of the tray in the first direction, the adjacent first boundary beams and the adjacent second boundary beams are connected to form the containing space in a surrounding mode, and the lifting lugs are located on the second boundary beams.

In an embodiment of the present application, the tray further includes a reinforcing beam disposed in the accommodating space and connected to the side beam, and the temperature-uniforming plate includes an inner surface facing the accommodating space and an outer surface opposite to the inner surface;

the length of the reinforcing beam extends along a first direction, the reinforcing beam is provided with two opposite first end faces in the first direction, the temperature equalizing plate is provided with two opposite first edge portions in the first direction, a limiting boss protruding relative to the inner face is arranged on the inner face of each first edge portion, and the limiting boss located on the same side in the first direction is abutted to the first end faces.

In an embodiment of the present application, the two first edge portions are respectively mounted on two second side beams;

one of the second edge beam and the first edge part is provided with a clamping groove on the inner surface facing the accommodating space, and the other of the second edge beam and the second edge part is inserted into the clamping groove.

In another aspect of the present application, an electric vehicle is further provided, which includes a vehicle body and a battery pack mounted on the vehicle body, where the battery pack is the battery pack described in any one of the above.

According to the battery package of this application embodiment, through setting up a connecting piece, the one end of connecting piece is fixed on the samming board, the other end of connecting piece be used for with the automobile body coupling, can improve battery package and automobile body coupling's fastness from this through the effect of connecting piece, prevent that the battery package from producing at the vehicle operation in-process and rocking and jolting to improve the vibration mode of battery package.

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 battery pack provided in an embodiment of the present application;

fig. 2 is a cross-sectional view of the battery pack of fig. 1 taken along direction AB;

FIG. 3 is an enlarged schematic view of FIG. 2 at dashed oval line C;

fig. 4 is an exploded schematic view of a battery pack provided in an embodiment of the present application;

FIG. 5 is a schematic view of a cooling pipe integrated on a vapor chamber according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a cooling pipe and a heating element integrated on a vapor chamber according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a tray provided in an embodiment of the present application.

Reference numerals:

battery pack 100

11. A tray; 110. an accommodating space; 111. a first edge beam; 112. a second edge beam; 1121. a card slot; 1122. a vertical frame; 1123. a horizontal frame; 113. a reinforcing beam; 1131. a first end face; 1132. a second end face; 114. lifting lugs; 12. a temperature equalizing plate; 121. a first edge portion; 122. a second edge portion; 123. a limiting boss; 124. a connecting member; 13. a single battery; 14. a cooling duct; 15. a heating member; 161. a water inlet pipe; 162. a water outlet pipeline; 163. transferring a pipeline; 17. a sealing cover; 171. 21, 26 bolts; 172. a through hole; 18. sealing the foam; 20. heat-conducting structural adhesive; 22 a base plate; 23 protecting the board; 24 and 25 thermally conductive structural adhesive.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function 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.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application. Furthermore, 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, "a plurality" means 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; can be mechanically or electrically connected; 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 the present application can be understood in a specific case by those of ordinary skill in the art.

The battery pack according to the embodiment of the present application will be described in detail with reference to fig. 1 to 7.

Referring to fig. 1 to 7, in the embodiment of the battery pack provided by the present application, the battery pack 100 is mounted on a body of an electric vehicle for providing power to the electric vehicle, and includes a tray 11 and a temperature-uniforming plate 12.

The tray 11 includes a boundary beam and a reinforcing beam 113, the boundary beam encloses the accommodating space 110 of the tray 11, and the reinforcing beam 113 is located in the accommodating space 110 and connected to the boundary beam. The receiving space 110 is used to receive the unit cells 13, wherein the receiving space 110 has a top opening. The temperature equalization plate 12 is disposed at the top opening of the accommodating space 110, so that the temperature equalization plate 12 can cover the top opening of the accommodating space 110. The battery pack 100 further includes a plurality of unit batteries 13, and the plurality of unit batteries 13 are disposed in the receiving space 110.

The length of the reinforcing beam 113 extends in a first direction, for example, the width direction of the pallet 11, i.e., the direction X shown in fig. 4. The reinforcement beam 113 has two first end surfaces 1131 opposite in the first direction X. The temperature equalization plate 12 comprises an inner surface facing the accommodating space 110 and an outer surface opposite to the inner surface, the temperature equalization plate 12 has two opposite first edge portions 121 in the first direction, a limiting boss 123 protruding relative to the inner surface is arranged on the inner surface of the first edge portion 121, namely, the surface of the first edge portion 121 facing the accommodating space 110, wherein the limiting boss 123 on the same side in the first direction X is abutted with the first end surface 1131. From this, two spacing protruding 123 platforms butt respectively on two first terminal surfaces 1131 of stiffening beam 113 to, when the side of temperature-uniforming plate 12 received the extrusion collision of external action power, can transmit partial atress to stiffening beam 113, be favorable to preventing that temperature-uniforming plate 12 from taking place tangential displacement, and can improve the anti extrusion ability of temperature-uniforming plate 12.

The limiting boss 123 and the temperature-uniforming plate 12 can be integrally formed or arranged in a split mode, and when the limiting boss 123 and the temperature-uniforming plate 12 are arranged in the split mode, the limiting boss 123 and the temperature-uniforming plate 12 can be fixed in a sticking or screwing mode and the like.

As shown in fig. 4, the battery pack 100 may further include a heat conductive adhesive 20, and the heat conductive adhesive 20 is connected between the inner surface of the temperature equalization plate 12 and the single battery 13, so as to facilitate heat transfer from the single battery 13 to the temperature equalization plate 12.

In the embodiment of the present application, the tray 11 is a substantially rectangular parallelepiped tray, the width of the tray 11 extends along a first direction X, the length of the tray 11 extends along a second direction Z, the thickness of the tray 11 extends along a third direction Y, the top opening of the accommodating space 110 is located on one side of the tray 11 in the third direction Y, and the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

With reference to fig. 4 and 7, the edge beams of the tray 11 include two first edge beams 111 and two second edge beams 112, the two first edge beams 111 are located on two opposite sides of the tray 11 along the second direction Z, the two second edge beams 112 are located on two opposite sides of the tray 11 along the first direction X, and the first edge beams 111 and the second edge beams 112 are connected to form the square tray 11. The reinforcing beam 113 is disposed in parallel with the first side beam 111. Further, the number of the reinforcement beams 113 may be two, one reinforcement beam 113 is disposed adjacent to one of the first side beams 111, and the other reinforcement beam 113 is disposed adjacent to the other first side beam 111, and the strength of the pallet 11 may be improved by the reinforcement beam 113.

The reinforcing beam has a second end surface 1132 facing the inner surface of the temperature equalization plate 12 in the third direction Y, the temperature equalization plate 12 is connected to the reinforcing beam 113, and the connection part is located on the second end surface 1132 of the reinforcing beam 113, wherein the temperature equalization plate 12 and the reinforcing beam 113 can be fixed by bolts 21, that is, a threaded hole is arranged at the part of the temperature equalization plate 12 corresponding to the second end surface 1132 of the reinforcing beam 113, and a corresponding threaded hole is also arranged on the second end surface 1132 of the reinforcing beam 113, so that the temperature equalization plate 12 and the reinforcing beam are fixed by being matched with the bolts 21. Alternatively, in other embodiments, the temperature-uniforming plate 12 and the reinforcing beam 113 may be welded.

In the embodiment of the present application, the two first edge portions 121 of the vapor chamber 12 are respectively mounted on the two second side beams 112. Specifically, a locking groove 1121 is formed on an inner surface of the second side beam 112 facing the accommodating space 110, and the second edge portion 122 of the temperature equalization plate 12 is inserted into the locking groove 1121. The slots 1121 may be, for example, right angle slots as shown, or may be a recessed configuration. Therefore, by arranging the clamping groove 1121, the edge of the temperature equalizing plate 12 is inserted into the clamping groove 1121, so that when the second edge beam 112 is extruded and collided, force can be transmitted to the temperature equalizing plate 12 through the second edge beam 112, the extrusion resistance of the second edge beam 112 is improved by using the temperature equalizing plate 12, and the probability that the second edge beam 112 is extruded to generate deformation is reduced.

Further, the second edge portion 122 of the vapor chamber 12 is bonded to the second edge beam 112 by glue.

In addition, the length of the single battery 13 of the present application is extended along the first direction X, the single battery 13 includes a pole for drawing current, the pole is located at the end of the single battery 13 along the first direction, wherein the positive and negative poles can be located at the same end of the single battery 13 along the first direction X, or at two opposite ends of the single battery 13 along the first direction X, namely, the poles of the single batteries 13 are disposed toward the second side beam 112, and are connected to the vapor chamber 12 by disposing the engaging grooves 1121 on the second side beam 112, so that when the second side frame 112 is impacted by the compression, the impact force is transmitted to the vapor chamber 12, the vapor chamber 12 transmits the impact force to the case of the unit cell 13 through the heat conductive adhesive 20, thereby improving the anti-extrusion capability of the second edge beam 112, avoiding the second edge beam 112 from deforming and extruding to the pole of the single battery 13, and preventing the short circuit between the single batteries 13.

In other embodiments, a slot may be provided on the second edge portion 122 of the vapor chamber 12, and the top portion of the second edge beam 112 is inserted into the slot of the second edge portion 122, so that the impact force applied to the second edge beam 112 can be transmitted to the vapor chamber 12, thereby improving the anti-extrusion capability of the second edge beam 112.

In the embodiment of the present application, referring to fig. 4, 5 and 6, a plurality of cooling pipes 14 are arranged in sequence on the outer surface of the temperature-uniforming plate 12, and a heating member 15 is arranged between two adjacent cooling pipes 14. Therefore, the heat dissipation of the battery pack 100 can be realized through the action of the cooling pipeline 14, and the battery pack 100 can be heated in a low-temperature environment through the action of the heating element 15, so that the performance and the service life of the single battery are ensured; in addition, this application embodiment is through integrateing cooling tube 14 and heating member 15 at samming board 12, and the space between make full use of cooling tube 14 sets up heating member 15, can reduce cooling tube 14 and heating member 15 and occupy the space of battery package 100, is favorable to improving the space utilization of battery package 100.

Wherein, the heating member 15 may be a heating film, which may be fixed on the temperature-uniforming plate 12 by means of adhesion.

In some embodiments of the present application, the temperature-equalizing plate 12 further comprises two opposite second edge portions 122, wherein the two first edge portions 121 of the temperature-equalizing plate 12 correspond to the two second edge beams 121 of the tray 11 in position one to one, and the two second edge portions 122 correspond to the two first edge beams 111 of the tray 11 in position one to one.

The cooling duct 14 is an elongated duct, and the length of the cooling duct 14 extends along the direction from one of the second edge portions 122 to the other second edge portion 122, i.e. the cooling duct 14 substantially covers the vapor chamber plate 12 in the second direction Z.

Further, the width of the vapor chamber 12 extends along a first direction, which is the width direction of the tray 11, as shown in fig. 4, the first direction is the direction X, and the length of the vapor chamber 12 extends along a second direction, which is the length direction of the tray 11, as shown in fig. 4, the second direction is the direction Z. The two first edges 121 are opposite sides of the temperature equalizing plate 12 along the second direction Z, and the plurality of cooling ducts 14 are sequentially arranged along the first direction X.

Wherein one end of the cooling duct 14 is disposed on one of the second edge portions 122, and the other end of the cooling duct 14 is disposed on the other second edge portion 122. The cooling pipes 14 are communicated with each other to form a cooling circuit.

Specifically, as shown in fig. 5, the battery pack 100 further includes a water inlet pipe 161, a water outlet pipe 162, and a switching pipe 163, the plurality of cooling pipes 14 are divided into at least one cooling unit, each cooling unit includes two cooling pipes, i.e., a first cooling pipe and a second cooling pipe, respectively, and as shown in fig. 5, the plurality of cooling pipes 14 are divided into 4 cooling units. The water inlet of the first cooling pipe is communicated with the water inlet pipe 161, the water outlet of the first cooling pipe and the water outlet of the second cooling pipe are both communicated with the same adapter pipe 163, and the water outlet of the second cooling pipe is communicated with the water outlet pipe 162, so that the cooling liquid enters the first cooling pipe from the water inlet pipe 161, flows to the second cooling pipe through the adapter pipe 163, and flows out from the water outlet pipe 162, and the cooling effect on the battery pack 100 is achieved.

The multiple cooling units are sequentially arranged along a first direction X, every two cooling units are in a group, first cooling pipelines of the two cooling units in the same group are communicated with the same water inlet pipeline 161, second cooling pipelines of the two cooling units in the same group are communicated with the same water outlet pipeline 162, first cooling pipelines of the cooling units in different groups are communicated with different water inlet pipelines, second cooling pipelines of the cooling units in different groups are communicated with different water outlet pipelines, and each cooling unit corresponds to one switching pipeline. Through the mode, the circulating cooling of the cooling liquid can be realized, and the cooling liquid only passes through the two cooling pipelines in the circulation path from the water inlet pipeline 161 to the water outlet pipeline 162, the number of the passing cooling pipelines is small, so that the cooling liquid can keep a low temperature when flowing into the next cooling pipeline, and the cooling effect of the cooling liquid is favorably improved.

In this embodiment, the cooling pipe 14 may be formed by extruding the aluminum material integrally with the temperature-uniforming plate 12, or the cooling pipe 14 and the temperature-uniforming plate 12 may be disposed in a split manner, and when the cooling pipe 14 is disposed in a split manner, the cooling pipe 14 may be connected to the temperature-uniforming plate 12 through the heat-conducting glue.

In the embodiment of the present application, the plurality of single batteries 13 are sequentially arranged along the second direction Z, that is, the plurality of single batteries 13 are sequentially arranged along the length direction of the tray 11, and the length of the single battery 13 extends along the first direction X. Therefore, for each cooling duct 14, each cooling duct 14 covers all the unit cells 13, which is advantageous for improving the heat dissipation effect. Of course, in other embodiments, the plurality of single batteries 13 may be arranged in sequence along the first direction X, and the lengths of the single batteries 13 extend along the second direction Z.

In the embodiment of the present application, as shown in fig. 6, the heating member 15 is an elongated heating member, and the length of the heating member 15 extends in a direction from one of the first edge portions 121 to the other first edge portion 121, i.e., the heating member 15 substantially covers the temperature-uniforming plate 12 in the second direction Z.

In the embodiment of the present application, the thickness of the cooling duct 14 is greater than that of the heating member 15, and it should be noted that the thickness of the cooling duct 14 and the heating member 15 refers to the thickness in the third direction Y, and the third direction is the height (thickness) direction of the tray 11, that is, the thickness of the cooling duct 14 and the thickness of the heating member 15 extend in the third direction Y based on the view shown in fig. 4. By making the thickness of the cooling pipe 14 larger than that of the heating member 15, friction between the sealing cover 17 and the heating member 15 can be effectively prevented, and the heating member 15 is protected.

In the embodiment of the present application, as shown in fig. 4, the battery pack 100 further includes a sealing cover 17 and a sealing foam 18. Wherein, the sealing cover 17 is positioned on the temperature equalizing plate 12 and connected with the tray 11 to cover the top opening of the tray 11. Wherein the sealing foam 18 is positioned between the sealing cover 17 and the tray 11 to improve the sealing property between the sealing cover 17 and the tray 11. Further, the sealing cover 17 may be fixed to the tray 11 by bolts 171, or the sealing cover 17 and the tray 11 may be fixed by rivets or welding. Moreover, the sealing foam 18 has a rebound characteristic, so that the requirement of detaching and repairing the sealing cover 17 can be met.

Wherein, screw holes may be provided on the top surfaces of the first and second side beams 111 and 112 facing the sealing cover 17, and the sealing cover 17 may also be provided with corresponding screw holes, so that the bolts 171 are engaged with the screw holes of the first and second side beams 111 and 112 and the screw holes of the sealing cover 17 to fix the sealing cover 17 to the tray 11.

In the embodiment of the present application, the temperature-uniforming plate 12 includes a bearing region for placing the cooling pipe 14 and the heating member 15 and a connection region excluding the bearing region, wherein the thickness of the connection region is greater than that of the bearing region, in other words, the temperature-uniforming plate 12 is divided into two partial regions, one partial region is used for placing the cooling pipe 14 and the heating member 15, and the other partial region is used as the connection region, wherein a connection portion of the temperature-uniforming plate 12 and the second end surface 1132 of the reinforcing beam 113 is located in the connection region with a larger thickness, so as to be beneficial to enhancing the strength of the connection portion between the temperature-uniforming plate 12 and the reinforcing beam 13, and the arching of the single battery 13 after multiple charging and discharging can be effectively suppressed.

The battery pack 100 further includes a connecting member 124, one end of the connecting member 124 is fixed to the vapor chamber 12, and the other end of the connecting member 124 is used for connecting with a body of a vehicle, where the body of the vehicle may refer to a structure other than the battery pack in an electric vehicle, that is, the structure other than the battery pack may be considered as a part of the body, for example, the connecting member 124 is used for connecting with a cross beam of a vehicle seat, thereby improving a vibration mode of the battery pack 100. More specifically, a through hole 172 is provided in the sealing cover 17 at a position corresponding to the connecting member 124 of the vapor chamber 12, and the connecting member 124 passes through the through hole 172 to protrude out of the battery pack 100 to be connected to the vehicle body. Therefore, the firmness of the connection between the battery pack 100 and the vehicle body can be improved through the action of the connecting piece 124, and the battery pack 100 is prevented from shaking and jolting in the running process of the vehicle.

The connecting member 124 may be, for example, a fixing nut, each fixing nut is sleeved with a sealing ring, and the fixing nut and the vehicle body may be connected by brazing.

In addition, the connecting member 124 may be fixed to a connecting region of the vapor panel 12, that is, a connecting portion of the vapor panel 12 and the vehicle body is located at the connecting region with a larger thickness, which is beneficial to improving the stability of the battery pack 100 on the vehicle.

In the embodiment of the present application, as shown in fig. 7, a lifting lug 114 is further disposed on the tray 11, and a mounting hole is disposed on the lifting lug 114, so as to be fixed to a vehicle body of a vehicle through the mounting hole, for example, fixed by a bolt, so as to mount the tray 11 on the vehicle body. Therefore, by fixing the tray 11 to the vehicle body and fixing the temperature-uniforming plate 12 to the vehicle body, the firmness of the battery pack 100 on the vehicle can be further improved, and the vibration of the battery pack during the driving of the vehicle can be further reduced.

Therefore, according to the embodiment of the present application, the battery pack 100 can be more stably connected to the body of the electric vehicle by the double fixation of the connecting member 124 and the tray 11.

In an embodiment of the present application, the second edge beams 112 may be L-shaped structures, and include a vertical edge frame 1122 and a horizontal edge frame 1123, where the horizontal edge frame 1123 is located at the bottom opening of the accommodating space 110, and the horizontal edge frames 1123 of the two second edge beams 112 are oppositely disposed to jointly enclose the bottom opening of the accommodating space 110, where the top opening and the bottom opening of the accommodating space 110 are oppositely disposed along a third direction, which is a direction Y shown in fig. 4. The battery pack 100 further includes a bottom plate 22 and a protective plate 23, the bottom plate 22 is connected to the horizontal rim 1123 to respectively accommodate the bottom openings of the spaces 110, and is located on the same plane as the horizontal rim 1123 to jointly carry the unit batteries 13.

The battery pack 100 further includes heat

conductive structure adhesives

24 and 25, the bottoms of the unit batteries 13 are connected to the horizontal rim 1123 and the bottom plate 22 through the heat conductive structure adhesive 25, and the bottom plate 22 is connected to the horizontal rim 1123 through the heat conductive structure adhesive 24 to seal the bottom opening of the receiving space 110. The protection plate 23 is positioned on the side of the bottom plate 22 opposite to the single battery 13 and is fixed to the horizontal rim 1123, for example, by bolts 26 screwed to the horizontal rim 1123.

By bonding the horizontal rim 1123 to the battery cell 13, the pressing force applied to the second rim 112 can be transmitted to the housing of the battery cell 13, and the anti-pressing capability of the tray 11 can be further improved.

The embodiment of the application also provides an electric vehicle, which comprises a vehicle body and a battery pack installed on the vehicle body, wherein the battery pack is the battery pack described in any one of the embodiments.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 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 battery pack is mounted on a body of an electric vehicle for powering the electric vehicle, the battery pack comprising:

a tray having an accommodation space with a top opening;

2. The battery pack according to claim 1, wherein the connecting member is a nut welded to a body of the electric vehicle.

3. The battery pack of claim 2, wherein the nut is sleeved with a sealing ring.

4. The battery pack according to claim 1, wherein the temperature-uniforming plate includes an inner surface facing the accommodating space and an outer surface opposite to the inner surface, the temperature-uniforming plate has a plurality of cooling ducts arranged in sequence on the outer surface thereof, and a heating member is disposed between adjacent two cooling ducts;

5. The battery pack according to claim 4, wherein the battery pack further comprises a plurality of single batteries disposed in the accommodating space, the plurality of single batteries are sequentially arranged along a second direction, and the lengths of the single batteries extend along the first direction;

6. The battery pack according to claim 1, wherein a lifting lug is provided on the tray, and the lifting lug is used for mounting the tray on a body of an electric vehicle.

7. The battery pack of claim 6, wherein the width of the tray extends in the first direction, the length of the tray extends in the second direction, the thickness of the tray extends in the third direction, and the top opening of the receiving space is located on one side of the tray in the third direction;

8. The battery pack of claim 7, wherein the tray further comprises a reinforcing beam disposed in the receiving space and connected to the side beam, and the vapor chamber plate comprises an inner surface facing the receiving space and an outer surface opposite to the inner surface;

9. The battery pack of claim 7, wherein the two first edge portions are mounted on two second side beams, respectively;

10. An electric vehicle comprising a vehicle body and a battery pack mounted on the vehicle body, wherein the battery pack is the battery pack according to any one of claims 1 to 9.