Power battery and electric vehicle

Abstract

The utility model provides a power battery and an electric vehicle, the power battery comprises a battery body and two anti-collision beams, the battery body comprises a shell, the two anti-collision beams are fixedly arranged on the two opposite sides of the shell in the first direction, the anti-collision beams extend in the second direction, and the second direction is perpendicular to the first direction; the bottom face of the anti-collision beam is lower than the lowest point of the shell. According to the scheme, the two anti-collision beams are arranged on the two opposite sides, in the first direction, of the outer side of the battery body correspondingly, the two anti-collision beams extend in the second direction perpendicular to the first direction, and the bottom faces of the anti-collision beams are lower than the lowest point of the shell, so that when an electric vehicle passes through obstacles such as a high speed bump, the anti-collision beams can not collide with the battery body; the bottom of the power battery is prevented from being contacted with an obstacle and is effectively protected. According to the scheme, a good protection effect is achieved, the overall structure is simple, the cost is low, the economic burden of consumers can be effectively reduced, and wide application is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a power battery and an electric vehicle. BACKGROUND

[0002] At present, the power battery is usually installed at the bottom of the electric vehicle. During driving, especially when passing through obstacles such as high-speed deceleration strips, the bottom of the power battery of the electric vehicle is prone to scratching or colliding with the obstacles, thereby causing damage to the power battery, and in severe cases, the battery may be out of control, thereby causing a safety accident.

[0003] In the related art, the device for protecting the bottom of the power battery has a complex structure and high cost, and is difficult to be widely applied. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a power battery and an electric vehicle, which can solve the problem that the device for protecting the bottom of the power battery has a complex structure, high cost and is difficult to be widely applied in the related art.

[0005] In a first aspect, the present application provides a power battery, comprising:

[0006] a battery body, the battery body comprising a shell:

[0007] two anti-collision beams, respectively fixedly arranged on opposite sides of the shell along a first direction, the anti-collision beams being arranged in extension along a second direction, the second direction being perpendicular to the first direction;

[0008] wherein the bottom surface of the anti-collision beam is lower than the lowest point of the shell.

[0009] The scheme provided by the present application embodiment is that two anti-collision beams are respectively arranged on opposite sides of the battery body along the first direction, the two anti-collision beams are arranged in extension along the second direction perpendicular to the first direction, and the bottom surface of the anti-collision beam is lower than the lowest point of the shell. When the electric vehicle passes through obstacles such as high-speed deceleration strips, the bottom of the power battery can be prevented from contacting the obstacles, the anti-collision beam with the bottom surface lower than the lowest point of the shell can contact and absorb the impact force of the obstacles, and effective protection of the bottom of the power battery is achieved. The present application scheme has good protection effect, and has simple overall structure and low cost, which can effectively reduce the economic burden of consumers and be widely applied.

[0010] In combination with the first aspect, in some possible implementation manners, the battery body further comprises:

[0011] a protective plate fixedly arranged at the bottom of the shell;

[0012] wherein the bottom surface of the anti-collision beam is lower than the lowest point of the protective plate.

[0013] With reference to the first aspect and the preceding implementation forms, in a possible implementation form of the first aspect, a height difference between a bottom surface of the anti-collision beam and a lowest point of the protective plate is greater than or equal to 10 mm.

[0014] With reference to the first aspect and the preceding implementation forms, in a possible implementation form of the first aspect, the battery body further comprises:

[0015] two connecting members respectively protruding from opposite sides of the shell along the first direction, the connecting members extending along the second direction, and the connecting members being fixedly connected with the anti-collision beam.

[0016] With reference to the first aspect and the preceding implementation forms, in a possible implementation form of the first aspect, the anti-collision beam comprises a beam body and a fastener, and the beam body is detachably connected with the connecting members through the fastener.

[0017] With reference to the first aspect and the preceding implementation forms, in a possible implementation form of the first aspect, the anti-collision beam comprises:

[0018] a plurality of beam segments, the plurality of beam segments being arranged along the second direction.

[0019] With reference to the first aspect and the preceding implementation forms, in a possible implementation form of the first aspect, a gap is reserved between two adjacent beam segments.

[0020] With reference to the first aspect and the preceding implementation forms, in a possible implementation form of the first aspect, a bottom surface of the anti-collision beam is covered with an elastic pad.

[0021] According to a second aspect, the present application provides an electric vehicle, comprising:

[0022] a vehicle body; and

[0023] a power battery according to any one of the preceding implementation forms of the first aspect, the power battery being fixed to the vehicle body.

[0024] wherein the first direction is a left-right direction of the vehicle body, and the second direction is a front-rear direction of the vehicle body.

[0025] With reference to the second aspect, in a possible implementation form of the second aspect, the battery body further comprises:

[0026] two side beams respectively arranged at opposite sides of the shell along the first direction, the side beams extending along the second direction and being detachably connected with the vehicle body.

[0027] Additional aspects and advantages of the application will be made apparent by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The accompanying drawings are included to provide a description of the embodiments and are not intended to limit the scope of the application. Moreover, in the drawings, like reference numerals designate similar parts throughout the various figures. In the drawings:

[0029] Figure 1 is a structural schematic diagram of an electric vehicle passing over an obstacle on the ground according to an embodiment of the present application;

[0030] Figure 2 is a partial exploded structural schematic diagram of an electric vehicle according to an embodiment of the present application; Figure 1

[0031] Figure 3 is a side view of an electric vehicle and an obstacle on the ground according to an embodiment of the present application; Figure 1

[0032] Figure 4 is a cross-sectional view of an electric vehicle and an obstacle on the ground along line A-A according to an embodiment of the present application; Figure 3

[0033] Figure 5 is a partial enlarged structural schematic diagram according to an embodiment of the present application; Figure 4

[0034] Figure 6 is a structural schematic diagram of a crash beam according to an embodiment of the present application.

[0035] The following is a description of the reference numerals in the drawings:

[0036] 1 - electric vehicle;

[0037] 100 - vehicle body;

[0038] 200 - power battery;

[0039] 210 - battery body; 211 - outer shell; 212 - fender; 213 - connecting member; 214 - side beam;

[0040] 220 - crash beam; 221 - beam body; 222 - fastener; 223 - beam segment;

[0041] 2 - ground; 21 - obstacle;

[0042] X - first direction; Y - second direction. DETAILED DESCRIPTION

[0043] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.​​​​

[0044] Unless otherwise defined, all 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; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. The description herein of any embodiments, including preferred embodiments, is not intended to be limiting. Various embodiments of the present application will now be described in detail with reference to the drawings.

[0045] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. It is explicitly contemplated that embodiments described herein can be combined with each other.

[0046] In the description of the embodiments of the present application, the directional or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0049] In the description of the embodiments of the present application, the term "and / or" only describes an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0050] At present, the power battery is usually installed at the bottom of the electric vehicle. During driving, especially when passing through obstacles such as high-speed deceleration strips, the power battery at the bottom of the electric vehicle is prone to scratching or colliding with the obstacles, thereby causing damage to the power battery, and in severe cases, the battery may be out of control, thereby causing a safety accident.

[0051] In the related art, the device for protecting the bottom of the power battery has a complex structure and high cost, and is difficult to be widely applied.

[0052] To solve the above technical problems, the present application provides a power battery and an electric vehicle. The power battery and the electric vehicle provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the specification.

[0053] Please refer to Figures 1 to 3 The electric vehicle 1 provided by the embodiments of the present application includes a vehicle body 100 and a power battery 200, and the power battery 200 is fixed to the vehicle body 100. The power battery 200 includes a battery body 210 and two crash beams 220, as shown in Figure 4 and Figure 5 The battery body 210 includes an outer shell 211, and the two crash beams 220 are respectively fixedly arranged on opposite sides of the outer shell 211 along a first direction X, and the crash beams 220 are arranged in extension along a second direction Y; wherein the bottom surface of the crash beam 220 is lower than the lowest point of the outer shell 211. As shown in Figures 1 to 3 The first direction X is the left-right direction of the vehicle body 100, and the second direction Y is the front-rear direction of the vehicle body 100, and the second direction Y is perpendicular to the first direction X.

[0054] When facing a collision, the crash beam 220 can provide sufficient protection capability and energy absorption effect. The structure of the crash beam 220 is various, for example, it can be a hollow tubular structure, and exemplarily, the crash beam 220 can adopt a square tube or the like. The material of the crash beam 220 can adopt high-strength steel, which has the advantages of high strength, good toughness and light weight. For some medium and high-end vehicle models, aluminum alloy materials, carbon fiber composite materials and the like with good strength and rigidity can also be used.

[0055] It should be noted that the bottom surface of the crash beam 220 refers to the side surface when the power battery 200 is installed at the bottom of the electric vehicle 1 and normally works. The lowest point of the outer shell 211 refers to the lowest part relative to the ground 2 when the power battery 200 is installed at the bottom of the electric vehicle 1 and normally works.

[0056] The bottom surface of the anti-collision beam 220 can be a plane, a curved surface or other specific shape. When the outer shell 211 of the battery body 210 is a plane, the lowest point of the outer shell 211 is all points on the plane of the outer shell 211. When the outer shell 211 of the battery body 210 has a structure or an accessory protruding downward toward the ground 2 due to special needs, the lowest point of the outer shell 211 is the point closest to the ground 2 in the profile of the structure or the accessory. The bottom surface of the anti-collision beam 220 is lower than the lowest point of the outer shell 211, which means that all points on the bottom surface of the anti-collision beam 220 are lower than the lowest point of the outer shell 211. When the bottom surface of the anti-collision beam 220 is a plane, all points on the bottom surface of the anti-collision beam 220 are lower than the lowest point of the outer shell 211, and the height difference between them is the same. When the bottom surface of the anti-collision beam 220 is a curved surface or other specific shape, all points on the bottom surface of the anti-collision beam 220 are lower than the lowest point of the outer shell 211, and the height difference between different points on the bottom surface of the anti-collision beam 220 and the lowest point of the outer shell 211 can not be the same. In this case, the bottom surface of the anti-collision beam 220 is lower than the lowest point of the outer shell 211, which can be understood as the highest point on the bottom surface of the anti-collision beam 220 being lower than the lowest point of the outer shell 211.

[0057] The scheme provided by the embodiments of the present application is to arrange two anti-collision beams 220 on the opposite sides of the outer side of the battery body 210 along the first direction X, extend the two anti-collision beams 220 along the second direction Y perpendicular to the first direction X, and make the bottom surface of the anti-collision beam 220 lower than the lowest point of the outer shell 211. When the electric vehicle 1 passes through an obstacle 21 such as a high-speed reduction belt, the bottom of the power battery 200 can be prevented from contacting the obstacle 21, and the anti-collision beam 220 with the bottom surface lower than the lowest point of the outer shell 211 of the power battery 200 can contact and absorb the impact force of the obstacle 21, thereby effectively protecting the bottom of the power battery 200. The scheme has good protection effect, simple overall structure and low cost, can effectively reduce the economic burden of consumers, and is widely applied.

[0058] In some embodiments, the battery body 210 further comprises a guard plate 212 fixedly arranged on the bottom of the outer shell 211; wherein the bottom surface of the anti-collision beam 220 is lower than the lowest point of the guard plate 212.

[0059] In order to protect the power battery 200, a guard plate 212 can be arranged on the bottom of the outer shell 211 of the battery body 210, and the guard plate 212 can be made of hard materials such as plastic plates and steel plates. When the vehicle drives on a poor road with pits and bumps, the guard plate 212 can shield flying stones and the like, and can provide additional protection for the power battery 200 to a certain extent.

[0060] For the battery body 210 provided with the guard plate 212, in order to avoid the high-speed hump or other obstacles 21 contacting or colliding with the guard plate 212, causing the guard plate 212 to be damaged, in the embodiment, the bottom surface of the anti-collision beam 220 is lower than the lowest point of the guard plate 212. That is, all points on the bottom surface of the anti-collision beam 220 are lower than the lowest point of the guard plate 212. When the bottom surface of the anti-collision beam 220 is a plane, all points on the bottom surface of the anti-collision beam 220 are lower than the lowest point of the guard plate 212, and the height difference between the bottom surface of the anti-collision beam 220 and the lowest point of the guard plate 212 is the same. When the bottom surface of the anti-collision beam 220 is a curved surface or other specific shape, all points on the bottom surface of the anti-collision beam 220 are lower than the lowest point of the guard plate 212, and the height difference between different points on the bottom surface of the anti-collision beam 220 and the lowest point of the guard plate 212 can not be the same. At this time, the bottom surface of the anti-collision beam 220 is lower than the lowest point of the guard plate 212, which can be understood as the highest point on the bottom surface of the anti-collision beam 220 being lower than the lowest point of the guard plate 212. When the electric vehicle 1 passes through the road surface with high-speed hump or other obstacles 21, the anti-collision beam 220 can block the obstacles 21, avoid the guard plate 212 contacting or colliding with the obstacles 21, and effectively prevent the guard plate 212 from being damaged.

[0061] In practical application, referring to Figure 5 In some embodiments, the height difference d between the bottom surface of the anti-collision beam 220 and the lowest point of the guard plate 212 is greater than or equal to 10 mm. For example, the value of d can be 10 mm, 12 mm, 14 mm, 15 mm, etc.

[0062] Referring to Figure 4 and Figure 5 In some embodiments, the battery body 210 can further include two connecting pieces 213, which are respectively protrudingly arranged on opposite sides of the shell 211 along the first direction X, and extend along the second direction Y. The connecting pieces 213 are fixedly connected with the anti-collision beam 220. Referring to Figure 2 and Figure 5 The connecting pieces 213 extend along the second direction Y, that is, the longitudinal direction of the electric vehicle 1. The connecting pieces 213 can provide a mounting basis for the anti-collision beam 220. The connecting pieces 213 can be integrally formed with the shell 211, or can be fixedly connected with the shell 211 by welding, screwing or other ways. The connecting pieces 213 can be hollow tubular structures. For example, the material of the connecting pieces 213 can be square tubes with high strength. In order to reduce the weight of the electric vehicle 1, the connecting pieces 213 can also be made of aluminum alloy materials with good strength and rigidity.

[0063] Referring to Figure 4 and Figure 5In addition to the connecting member 213, in some embodiments, the battery body 210 can further include two side beams 214, which are respectively arranged on opposite sides of the shell 211 along the first direction X; the side beams 214 extend along the second direction Y and are detachably connected with the vehicle body 100. The battery body 210 can be firmly connected with the vehicle body 100 through the side beams 214. As shown in Figure 5 , the side beams 214 are generally arranged on the upper side of the connecting member 213. The side beams 214 can be integrally formed with the shell 211 of the battery body 210, or can be fixedly connected with the shell 211 by welding, screwing or other ways. The side beams 214 can have various structural forms, for example, can be a strip structure with an inverted trapezoidal interface as shown in Figure 5 , of course, the side beams 214 can also have a strip structure with other regular or irregular interfaces.

[0064] The connecting member 213 and the crash beam 220 can be connected by welding or integrally formed and cannot be detached. Considering the replacement and maintenance of the crash beam 220 after collision damage, as shown in Figure 5 , in some embodiments, the crash beam 220 can also include a beam body 221 and a fastener 222, and the beam body 221 is detachably connected with the connecting member 213 through the fastener 222. For example, as shown in Figure 5 , corresponding mounting holes can be arranged on the beam body 221 and the connecting member 213 respectively, and the fastener 222 adopts a bolt and a nut, which is screwed through the mounting hole and connected with the nut in a threaded manner, so as to achieve detachable connection of the crash beam 220 and the connecting member 213. In order to facilitate the installation of the fastener 222, the nut can also be welded and fixed on the connecting member 213 corresponding to the mounting hole in the connecting member 213. In this way, when the crash beam 220 is installed, the bolt can be conveniently and fixedly connected with the connecting member 213 by aligning the mounting hole and the nut and rotating the bolt.

[0065] As shown in Figure 2 , in some embodiments, the crash beam 220 can have a whole strip structure, and the strip structure is connected with the connecting member 213 through a plurality of fasteners 222. As shown in Figure 6 , in other embodiments, in order to facilitate the replacement and maintenance of the crash beam 220 after collision damage, the crash beam 220 can include a plurality of beam segments 223 arranged along the second direction Y. In other words, each beam segment 223 of the crash beam 220 can be arranged as a standard length, for example, 10 cm, 15 cm, 20 cm, etc. The plurality of beam segments 223 are detachably connected with the connecting member 213. For example, Figure 6 , the crash beam 220 can be arranged as two beam segments 223, and the two ends of each beam segment 223 are detachably connected with the connecting member 213 through the fastener 222.

[0066] It is considered that the length of the beam segment 223 will change when the temperature changes. Specifically, when the temperature rises, the beam segment 223 will expand and increase in length; when the temperature drops, the beam segment 223 will shrink and decrease in length. In order to cope with the thermal expansion and contraction of the beam segment 223 and avoid deformation and damage caused by thermal expansion and contraction, in some embodiments, a gap is reserved between two adjacent beam segments 223, which can provide enough space for the beam segment 223 to expand or shrink when the temperature changes, especially at high temperatures to avoid mutual pushing and deformation and damage of the beam segment 223 due to expansion. The size of the reserved gap can be flexibly set according to the material used by the beam segment 223, which is not specifically limited in the embodiments of the present application.

[0067] In some embodiments, the bottom surface of the crash beam 220 can be covered with an elastic pad (not shown in the figure). The elastic pad can be fixed to the bottom surface of the crash beam 220 by adhesion, riveting or the like. The elastic pad can not only protect the bottom surface of the crash beam 220, but also can act as a buffer to reduce the impact of the road obstacle 21 on the electric vehicle 1. The elastic pad can be made of rubber, polyurethane, fiber fabric or the like. Designers can choose appropriate materials to make the elastic pad according to needs, which is not specifically limited in the embodiments of the present application.

[0068] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A power cell (200), characterized by The battery body (210) comprises a shell (211): Two anti-collision beams (220) are respectively fixedly arranged on opposite sides of the shell (211) along a first direction (X), and the anti-collision beams (220) extend along a second direction (Y) perpendicular to the first direction (X). The bottom surface of the anti-collision beam (220) is lower than the lowest point of the shell (211). The battery body (210) further comprises:

2. The power cell (200) according to claim 1, characterized in that A guard plate (212) is fixedly arranged on the bottom of the shell (211). The bottom surface of the anti-collision beam (220) is lower than the lowest point of the guard plate (212). The height difference between the bottom surface of the anti-collision beam (220) and the lowest point of the guard plate (212) is greater than or equal to 10 mm.

3. The power cell (200) according to claim 2, characterized in that The battery body (210) further comprises:

4. The power cell (200) according to any one of claims 1 to 3, characterized in that Two connecting pieces (213) are respectively protrudingly arranged on opposite sides of the shell (211) along the first direction (X), and the connecting pieces (213) extend along the second direction (Y) and are fixedly connected with the anti-collision beams (220). The anti-collision beam (220) comprises a beam body (221) and a fastener (222), and the beam body (221) is detachably connected with the connecting piece (213) through the fastener (222).

5. The power cell (200) according to claim 4, characterized in that The anti-collision beam (220) comprises:

6. The power cell (200) according to claim 4, characterized in that A plurality of beam segments (223) are arranged in the second direction (Y). A gap is reserved between adjacent two beam segments (223).

7. The power cell (200) according to claim 6, characterized in that The bottom surface of the anti-collision beam (220) is covered with an elastic pad.

8. The power cell (200) of claim 1, wherein, The battery body (210) comprises:

9. An electric vehicle (1), characterized in that A vehicle body (100); And The power battery (200) as claimed in any one of claims 1 to 8 is fixed to the vehicle body (100). The first direction (X) is the left-right direction of the vehicle body (100), and the second direction (Y) is the front-rear direction of the vehicle body (100). The battery body (210) further comprises:

10. The electrically driven vehicle (1) according to claim 9, characterized in that Two side beams (214) are respectively arranged on opposite sides of the shell (211) along the first direction (X); the side beams (214) extend along the second direction (Y) and are detachably connected with the vehicle body (100). ​

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