Bracket assembly, battery pack and electric automobile

Abstract

The invention discloses a bracket assembly, a battery pack and an electric automobile, and belongs to a grounding technology in the field of electric automobiles. The bracket assembly comprises a bracket body, the bracket body is arranged on the electric vehicle and used for installing and fixing the battery pack, the bracket assembly further comprises a grounding device, the grounding device is used for guiding charges on the battery pack out of the bracket assembly and comprises an installation base and a conductive assembly, the installation base is connected to the bracket body, and the conductive assembly is arranged on the installation base. And the conductive component is movably connected to the mounting seat and is used for guiding charges of the battery pack shell out of the bracket assembly. The conductive assembly is movably arranged on the mounting seat, and when the battery pack generates relative displacement relative to the bracket main body, the conductive assembly can move relative to the bracket main body along with the battery pack within a certain range, so that the electric connection relation with the battery pack is better maintained; and the stability and the reliability of the electric connection between the grounding device and the battery pack are improved.

Description

[0001] This application is a divisional of a Chinese invention patent with an application date of July 6, 2020, application number 202010642721.8, and name “Bracket assembly, battery pack and electric vehicle”. Technical Field

[0002] The present invention relates to a grounding technology in the field of electric vehicles, and in particular to a bracket assembly, a battery pack and an electric vehicle. Background Art

[0003] The battery pack is one of the core components of electric vehicles. The batteries in the battery pack serve as the onboard power source of electric vehicles. Batteries have the risk of leakage. Considering safety, electric vehicles are equipped with a grounding structure to lead out the leakage of the battery. The current grounding structure usually uses a coil to connect the battery and the vehicle frame, but the stability and reliability of this method are poor. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of poor stability and reliability of the grounding structure of electric vehicles in the prior art, and to provide a bracket assembly, a battery pack and an electric vehicle.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A bracket assembly, characterized in that the bracket assembly includes a bracket body, the bracket body is arranged on an electric vehicle, the bracket body is used to install and fix a battery pack, the bracket assembly also includes a grounding device, the grounding device is used to conduct the charge on the battery pack to the outside of the bracket assembly, and the grounding device includes:

[0007] A mounting seat connected to the bracket body; and

[0008] A conductive component, the conductive component is movably connected to the mounting seat, and the conductive component is used to conduct the charge of the battery pack shell to the outside of the bracket assembly;

[0009] The conductive component comprises:

[0010] A first end portion, the first end portion is used to receive the charge of the battery pack housing; and,

[0011] The second end is used to connect to the grounding lead-out component outside the bracket assembly. The charge reaches the second end axially from the first end. The second end is used to lead the charge to the grounding lead-out component outside the bracket assembly.

[0012] Preferably, the conductive component is configured to move relative to the mounting seat on the X-axis and / or the Y-axis and / or the Z-axis when subjected to external action, and is configured to automatically reset after the external action disappears.

[0013] Preferably, the first end has a first conductive surface, the battery pack has a second conductive surface, the first conductive surface is used to contact and conduct with the second conductive surface, and when conducting, the second conductive surface is completely covered by the first conductive surface;

[0014] and / or,

[0015] The second end has a third conductive surface, and the grounding lead-out component outside the bracket assembly is connected to the third conductive surface and is conductively connected to the third conductive surface.

[0016] Preferably, the conductive component includes a pole, and the two ends of the pole are the first end and the second end respectively; the pole is configured to move relative to the mounting seat on the X-axis and / or Y-axis and / or Z-axis when subjected to the external action, and is configured to automatically reset after the external action disappears.

[0017] Preferably, the conductive component further comprises an elastic member, the elastic member is sleeved on the pole, one end of the elastic member abuts against the pole, and the other end abuts against the mounting seat; the elastic member is used to drive the pole to automatically reset.

[0018] Preferably, the diameter of one end of the elastic member abutting against the pole is smaller than the diameter of one end of the elastic member abutting against the mounting seat;

[0019] or,

[0020] The elastic member includes a narrow end and a wide end, the narrow end abuts against the pole, the wide end abuts against the mounting seat, the inner ring of the elastic member gradually narrows from the wide end to the narrow end, and the outer ring of the elastic member gradually narrows from the wide end to the narrow end.

[0021] Preferably, the pole includes a first column section and a first limiting portion, the first limiting portion is located at one end of the first column section; the mounting seat includes a second limiting portion; the elastic member is sleeved on the first column section, and the two ends of the elastic member respectively abut the first limiting portion and the second limiting portion.

[0022] Preferably, the first limiting portion is an annular structure or a convex structure uniformly distributed around the circumference of the first column segment;

[0023] and / or,

[0024] The second limiting portion is an annular structure or a plurality of convex structures arranged at intervals;

[0025] And / or, the pole also includes a second column segment, one end of the second column segment is connected to the first column segment, and the other end is connected to the first end portion; wherein: the cylindrical surface of the second column segment has at least one set of relatively arranged mounting planes, and / or, the cylindrical surface of the second column segment protrudes from the cylindrical surface of the first column segment, and / or, the outer surface of the first end portion protrudes from the cylindrical surface of the second column segment.

[0026] Preferably, the outer wall of the second end portion has a slot, and the conductive component also includes a limiting ring that is locked in the slot, the limiting ring and the mounting seat limit each other, and the elastic member is compressed between the mounting seat and the pole, and the limiting ring and the elastic member cooperate with each other to limit the pole from detaching from the mounting seat.

[0027] Preferably, the conductive component further comprises a fixing member, and the fixing member is used to press the grounding lead-out component outside the bracket assembly onto the second end portion.

[0028] Preferably, the fixing member includes a shaft segment and a third limiting portion, the second end portion has a groove recessed along the axial direction, one end of the shaft segment is threadedly connected to the groove of the second end portion, the other end of the shaft segment is connected to the third limiting portion, and the side surface of the third limiting portion protrudes from the cylindrical surface of the shaft segment.

[0029] Preferably, the mounting seat has a guide channel, and the conductive component passes through the mounting seat at the guide channel.

[0030] Preferably, the conductive component is configured to move axially along the guide channel and / or move radially along the guide channel when subjected to external force;

[0031] and / or,

[0032] The mounting seat includes a flange body and a guide body, the flange body is connected to one end of the guide body, the flange body is detachably connected to the bracket body, and the flange body and the guide body together form the guide channel; the flange body or the guide body has the second limiting portion extending toward the center of the guide channel, the elastic member is compressed between the second limiting portion and the first limiting portion, and applies a force extending from the flange body toward the guide body to the pole.

[0033] Preferably, the mounting seat further comprises a limiting body, which is arranged at the end of the guide channel on the flange body and is used to limit the conductive component from being separated from the guide channel.

[0034] An electric vehicle comprises the bracket assembly and a battery pack as described above.

[0035] Preferably, the battery pack comprises a battery box and a grounding assembly, wherein the grounding assembly is disposed on the battery box and is used to introduce the charge on the battery box into a grounding device.

[0036] Preferably, the grounding assembly comprises a conductive member, the conductive member is detachably connected to the battery box, and the conductive member is in surface contact with and conductive to the grounding device.

[0037] Preferably, the battery box has a boss, and the conductive member is connected to the free end of the boss via a fastener.

[0038] Preferably, the battery pack is mounted on the bracket assembly, and the charge on the battery pack is introduced into the grounding lead-out component on the electric vehicle through the grounding component and the grounding device.

[0039] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0040] The positive and progressive effects of the present invention are:

[0041] In the present invention, the conductive component is movably arranged on the mounting seat. When the battery pack is relatively displaced relative to the bracket body, the conductive component can move relative to the bracket body together with the battery pack within a certain range, thereby better maintaining the electrical connection with the battery pack, facilitating the discharge of the charge on the battery pack shell to the outside of the bracket, and improving the stability and reliability of the electrical connection between the grounding device and the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a bracket assembly according to an embodiment of the present invention;

[0043] Figure 2 for Figure 1 A magnified view of part A;

[0044] Figure 3 A schematic diagram of the structure of a pole according to an embodiment of the present invention;

[0045] Figure 4 FIG. 1 is a schematic diagram of a partial structure of a battery pack according to an embodiment of the present invention.

[0046] Description of reference numerals:

[0047] Bracket assembly 1000

[0048] Bracket body 100

[0049] Grounding device 10

[0050] Mounting Block 11

[0051] Flange body 111

[0052] The second limiting portion 1111

[0053] Guide body 112

[0054] Guide channel 113

[0055] Limiting body 114

[0056] Conductive component 12

[0057] Pole 121

[0058] First end 1211

[0059] Second end 1212

[0060] Card slot 12121

[0061] Groove 12122

[0062] The third conductive surface 12123

[0063] First conductive surface 1213

[0064] First column section 1214

[0065] The first limiting portion 12141

[0066] Second column section 1215

[0067] Installation plane 12151

[0068] Elastic member 122

[0069] Narrow end 1221

[0070] Wide end 1222

[0071] Limiting ring 123

[0072] Fixing parts 124

[0073] Shaft section 1241

[0074] The third limiting portion 1242

[0075] Battery Pack 2000

[0076] Battery box 200

[0077] Boss 201

[0078] Grounding assembly 20

[0079] Conductive member 21

[0080] The second conductive surface 211

[0081] Counterbore 212 DETAILED DESCRIPTION

[0082] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0083] See also Figure 1 The embodiment of the present invention provides a bracket assembly 1000, which is arranged on an electric vehicle and used to carry a battery pack 2000. The bracket assembly 1000 is fixedly connected to the entire vehicle body of the electric vehicle.

[0084] The bracket assembly 1000 includes a bracket body 100 , which is fixed on the entire vehicle body of the electric vehicle and is used to install and fix the battery pack 2000 .

[0085] The bracket assembly 1000 further includes a grounding device 10, which is used to conduct the charge on the battery pack 2000 to the outside of the bracket assembly 1000. The charge there can be understood as leakage on the battery pack 2000, which can come from the battery. The grounding device 10 can be fixed on the bracket body 100, and is used to connect the battery pack 2000 and the vehicle body of the electric vehicle to the same potential through the bracket body 100, and conduct the charge carried by the battery pack 2000 shell to the vehicle body.

[0086] The grounding device 10 includes a mounting seat 11 , which is fixed to the bracket body 100 . The mounting seat 11 can be detachably connected to the bracket body 100 by bolts, nuts, etc.

[0087] The grounding device 10 further includes a conductive component 12, which is movably connected to the mounting seat 11, and is used to receive the charge on the battery pack 2000 and export the charge to the outside of the bracket assembly 1000. The movably connected conductive component 12 and the mounting seat 11 can be understood as: the conductive component 12 generates displacement and / or torque relative to the mounting seat 11 when subjected to a force. The conductive component 12 is movably arranged on the mounting seat 11, which can improve the stability and reliability of the electrical connection between the conductive component 12 and the battery pack 2000 during use and assembly. For example, during the operation of the electric vehicle, when the battery pack 2000 is subjected to vibration and produces relative displacement relative to the bracket body 100, the conductive component 12 can move relative to the bracket body 100 together with the battery pack 2000 within a certain range, thereby better maintaining the electrical connection relationship with the battery pack 2000. For another example, during the process of assembling the bracket assembly 1000 and the battery pack 2000, the conductive component 12 can move within a certain range when collided with the battery pack 2000, thereby avoiding mechanical damage caused by collision with the battery pack 2000.

[0088] It can be seen that the embodiment of the present invention improves the reliability and stability of the grounding device 10 by movably mounting the conductive component 12 on the bracket body 100 .

[0089] In the embodiment of the present invention, the conductive component 12 is configured to move relative to the mounting base 11 on the X-axis and / or the Y-axis and / or the Z-axis when subjected to external forces, and is configured to automatically reset after the external forces disappear. The external forces here are understood to be forces outside the grounding device 10, and the external forces can be forces applied to the conductive component 12 by the battery pack 2000; the X-axis, Y-axis and Z-axis can be understood as three axes of the Cartesian coordinate system.

[0090] It can be seen that in the embodiment of the present invention, the conductive component 12 can be displaced in any direction relative to the bracket body 100 when subjected to external forces, thereby improving the reliability and stability of the grounding device 10.

[0091] See also Figure 1-2 In the embodiment of the present invention, the conductive component 12 includes a first end portion 1211, and the first end portion 1211 is used to receive the charge on the upper shell of the battery pack 2000, and the first end portion 1211 and the battery pack 2000 can be electrically connected through surface contact.

[0092] The conductive component 12 further includes a second end 1212, and the second end 1212 is used to connect to a grounding lead-out component outside the bracket assembly 1000. The second end 1212 is arranged opposite to the first end 1211, and the two are electrically connected. When the first end 1211 and the second end 1212 are conductive, the charge travels from the first end 1211 to the second end 1212 along the X-axis direction, and the second end 1212 is used to lead the charge to the grounding lead-out component outside the bracket assembly 1000.

[0093] Furthermore, in the present embodiment, the first end portion 1211 and the second end portion 1212 may both extend out of both ends of the mounting seat 11. In other embodiments, as an alternative means, one of the first end portion 1211 and the second end portion 1212 directly extends out of the mounting seat 11, and the other is located inside the mounting seat 11, which is also within the protection scope of the present invention.

[0094] See also Figure 1-2for understanding. In the embodiment of the present invention, the first end portion 1211 has a first conductive surface 1213, and the battery pack 2000 has a second conductive surface 211. The first conductive surface 1213 is used to contact and conduct with the second conductive surface 211. When conducting, the second conductive surface 211 is completely covered by the first conductive surface 1213. In other words, the first conductive surface 1213 and the second conductive surface 211 are in contact to achieve conduction, and the area of ​​the first conductive surface 1213 is larger than the area of ​​the second conductive surface 211, thereby allowing the battery pack 2000 to be displaced relative to the conductive component 12, further improving the stability and reliability of the grounding device 10. Among them, the shapes of the first conductive surface 1213 and the second conductive surface 211 are adapted to each other, that is, the surface shapes of the two are consistent, for example, both are planes or curved surfaces with a straight curvature.

[0095] In the embodiment of the present invention, the second end portion 1212 has a third conductive surface 12123, and the grounding lead-out component outside the bracket assembly 1000 is pressed on the third conductive surface 12123 and is in electrical communication with the third conductive surface 12123. The third conductive surface 12123 and the conductor are electrically connected by contact, and pressing the conductor on the third conductive surface 12123 can improve the stability and reliability of the electrical connection between the two, thereby further improving the stability and reliability of the grounding device 10.

[0096] See also Figure 2 Understand. In the embodiment of the present invention, the conductive component 12 includes a pole 121, and the two ends of the pole 121 are the above-mentioned first end 1211 and the second end 1212. The pole 121 is configured to move relative to the mounting seat 11 on the X-axis and / or the Y-axis and / or the Z-axis when subjected to external action, and is configured to automatically reset after the external action disappears. Among them, the extension direction of the pole 121 is on the X-axis, that is, the first end 1211 and the second end 1212 are located on the X-axis.

[0097] See also Figure 2 for understanding. In an embodiment of the present invention, the conductive component 12 also includes an elastic member 122, and the elastic member 122 is sleeved on the pole 121 along the X-axis, one end of the elastic member 122 abuts the pole 121, and the other end abuts the mounting seat 11, and the elastic member 122 is used to drive the pole 121 to automatically reset. When the pole 121 is subjected to a force along the X-axis, the elastic member 122 is compressed, and when the force disappears, the elastic member 122 drives the pole 121 to automatically reset. Indeed, when the pole 121 is subjected to forces in other directions, the elastic member 122 may also produce corresponding deformations, and drive the pole 121 to automatically reset when the force disappears.

[0098] In the embodiment of the present invention, the diameter of one end of the elastic member 122 abutting against the pole 121 is smaller than the diameter of one end of the elastic member 122 abutting against the mounting seat 11 .

[0099] See also Figure 2 for understanding. In the embodiment of the present invention, the elastic member 122 includes a narrow end 1221 and a wide end 1222, the narrow end 1221 abuts against the pole 121, and the wide end 1222 abuts against the mounting seat 11. The inner ring of the elastic member 122 gradually narrows from the wide end 1222 to the narrow end 1221, and the outer ring of the elastic member 122 gradually narrows from the wide end 1222 to the narrow end 1221, so that the pole 121 can overcome the force of the elastic member 122 when subjected to a force in a non-X-axis direction and produce a corresponding deformation, and reset together with the elastic member 122 after the force disappears. The elastic member 122 can adopt a pagoda-shaped spring.

[0100] See also Figure 2-3 In the embodiment of the present invention, the pole 121 includes a first pole section 1214 , and the first pole section 1214 may be cylindrical or other cylindrical. The elastic member 122 is sleeved on the first pole section 1214 .

[0101] The pole 121 further includes a first limiting portion 12141 , which is located at one end of the first column segment 1214 . The first limiting portion 12141 protrudes from the cylindrical surface of the first column segment 1214 and is used to limit the elastic member 122 .

[0102] The mounting seat 11 includes a second limiting portion 1111 . The second limiting portion 1111 and the first limiting portion 12141 are located at two ends of the elastic member 122 . The elastic member 122 is configured to always maintain a force with the first limiting portion 12141 and the second limiting portion 1111 .

[0103] Further, the first limiting portion 12141 is an annular structure or a convex structure uniformly distributed around the circumference of the first column section 1214. The second limiting portion 1111 is an annular structure or a plurality of convex structures arranged at intervals.

[0104] See also Figure 2-3 In the embodiment of the present invention, the pole 121 further includes a second column segment 1215, one end of the second column segment 1215 is connected to the first column segment 1214, and the other end is connected to the first end portion 1211. In other words, the second column segment 1215 is located between the first column segment 1214 and the first end portion 1211. The first column segment 1214, the first limiting portion 12141, the second column segment 1215 and the first end portion 1211 can be integrally formed.

[0105] The second column section 1215 has at least one set of relatively arranged mounting planes 12151 on its cylindrical surface, so that when assembling the grounding device 10 and assembling the grounding device 10 on the bracket body 100, an external tool can be used to clamp the set of mounting planes 12151 to keep the pole 121 stationary, thereby improving the assembly efficiency and facilitating the control of the assembly accuracy.

[0106] The cylindrical surface of the second column segment 1215 may protrude from the cylindrical surface of the first column segment 1214, and the outer surface of the first end portion 1211 protrudes from the cylindrical surface of the second column segment 1215, so that the first conductive surface 1213 has a larger area. The first column segment 1214 and the second column segment 1215 may both be cylindrical, and the cross-sectional diameter of the second column segment 1215 is larger than the cross-sectional diameter of the first column segment 1214; the first end portion 1211 may be cylindrical or truncated cone, or a structure including a cylindrical and truncated cone.

[0107] See also Figure 2-3 for understanding. In the embodiment of the present invention, the outer wall of the second end 1212 has a slot 12121, and the conductive component 12 also includes a limit ring 123 that is clamped in the slot 12121. The limit ring 123 and the mounting seat 11 are mutually limited, and the elastic member 122 is compressed between the mounting seat 11 and the pole 121. The limit ring 123 and the elastic member 122 cooperate with each other to limit the pole 121 from being separated from the mounting seat 11. Among them, the slot 12121 is an annular groove, which is arranged around the second end 1212; the limit ring 123 is an annular body, and the inner ring of the limit ring 123 is clamped in the slot 12121, so as to move with the pole 121; the outer ring of the limit ring 123 and the mounting seat 11 are mutually limited, so that the elastic member 122 is compressed between the first limit portion 12141 and the second limit portion 1111. When the battery pack 2000 applies a load located on the X-axis and pointing to the second end 1212 to the pole 121 from the first end 1211, the elastic member 122 is further compressed, and the limiting ring 123 is separated from the mounting seat 11. After the load disappears, the elastic member 122 drives the pole 121 and the limiting ring 123 to reset until the outer ring of the limiting ring 123 contacts the mounting seat 11 and limits each other.

[0108] See also Figure 2 In the embodiment of the present invention, the conductive assembly 12 further includes a fixing member 124, and the fixing member 124 is used to press the grounding lead-out member outside the bracket assembly 1000 to the second end 1212, so that the pole 121 is stably connected to the conductor.

[0109] See also Figure 2 In the embodiment of the present invention, the fixing member 124 includes a shaft section 1241 and a third limiting portion 1242, the second end portion 1212 has a groove 12122 recessed in the axial direction, one end of the shaft section 1241 is threadedly connected to the groove 12122 of the second end portion 1212, the other end of the shaft section 1241 is fixedly connected to the third limiting portion 1242, and the side surface of the third limiting portion 1242 protrudes from the cylindrical surface of the shaft section 1241, so as to press the conductor on the second end portion 1212. The shaft section 1241 and the third limiting portion 1242 can be integrally formed. The fixing member 124 can also be implemented by bolts.

[0110] The bracket assembly 1000 is explained above from the perspective of the conductive component 12 , and the bracket assembly 1000 is further explained below in conjunction with the mounting base 11 .

[0111] See also Figure 2 In the embodiment of the present invention, the mounting seat 11 has a guide channel 113, and the conductive component 12 passes through the mounting seat 11 at the guide channel 113. In other words, the conductive component 12 passes through the mounting seat 11, and both ends of the conductive component 12 can extend out of the mounting seat 11; the guide channel 113 guides the conductive component 12 and constrains the upper limit of the movement of the conductive component 12 when it bears the load of the battery pack 2000 and moves relative to the mounting seat 11.

[0112] In the embodiment of the present invention, the conductive component 12 is configured to move along the axial direction of the guide channel 113 and / or move along the radial direction of the guide channel 113 when subjected to external force. The axial direction of the guide channel 113 can be understood as the X-axis direction mentioned above. In other words, the conductive component 12 can move along the axial direction of the guide channel 113, or along any radial direction of the guide channel 113. When the conductive component 12 moves along the radial direction of the guide channel 113, both ends of the conductive component 12 move in opposite directions.

[0113] See also Figure 2 for understanding. In the embodiment of the present invention, the mounting seat 11 includes a flange body 111 and a guide body 112, the flange body 111 is connected to one end of the guide body 112, the flange body 111 is detachably connected to the bracket body 100, the flange body 111 and the guide body 112 both have through holes, and the through holes of the two are connected, thereby forming the above-mentioned guide channel 113. The flange body 111 or the guide body 112 has the above-mentioned second limiting portion 1111 extending toward the center of the guide channel 113, the elastic member 122 is compressed between the second limiting portion 1111 and the first limiting portion 12141, and applies a force extending from the flange body 111 to the guide body 112 to the pole 121. The flange body 111 and the guide body 112 can be integrally formed, or can be two relatively independent parts.

[0114] See also Figure 2 for understanding. In the embodiment of the present invention, the mounting seat 11 also includes a limiting body 114, which is disposed at the end of the guide channel 113 on the flange body 111, and is used to limit the conductive component 12 from being separated from the guide channel 113. The limiting body 114 may be an annular plate-like structure. The second limiting portion 1111 is indirectly limited to the conductive component 12 through the limiting body 114. The outer ring of the limiting body 114 is fixedly connected to the flange body 111, and the inner ring of the limiting body 114 is limited to the limiting ring 123 in the conductive component 12, so that an elastic force is maintained between one side of the second limiting portion and the conductive component 12.

[0115] See also Figure 4 The embodiment of the present invention further provides a battery pack 2000, the battery pack 2000 includes a battery box 200 and a grounding assembly 20, the grounding assembly 20 is disposed on the battery box 200, and is used to introduce the charge on the battery box 200 into the grounding device 10. In other words, the grounding assembly 20 is electrically connected to the grounding device 10.

[0116] The grounding assembly 20 includes a conductive member 21, which is detachably connected to the battery box 200, and is in surface contact and conduction with the conductive assembly 12. The conductive member 21 has the second conductive surface 211 formed thereon.

[0117] The battery box 200 has a boss 201, and the conductive member 21 is connected to the free end of the boss 201 through a fastener. Preferably, the end surface of the fastener is sunken into the surface of the conductive member 21.

[0118] The embodiment of the present invention further provides an electric vehicle, comprising the bracket assembly 1000 as described in any of the above embodiments and the battery pack 2000 as described in any of the above embodiments. The battery pack 2000 is mounted on the bracket assembly 1000, and the charge on the battery pack 2000 is introduced into the grounding lead-out component on the electric vehicle through the grounding component 20 and the conductive component 12.

[0119] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A bracket assembly, characterized in that: The bracket assembly includes a bracket body, which is arranged on the electric vehicle and used to install and fix the battery pack. The bracket assembly also includes a grounding device, which is used to conduct the charge on the battery pack to the outside of the bracket assembly. The grounding device includes: A mounting seat connected to the bracket body; and A conductive component, the conductive component is movably connected to the mounting seat, and the conductive component is used to conduct the charge of the battery pack shell to the outside of the bracket assembly; The conductive component comprises: A first end portion, the first end portion is used to receive the charge of the battery pack housing; and, The second end is used to connect to the grounding lead-out component outside the bracket assembly. The charge reaches the second end axially from the first end. The second end is used to lead the charge to the grounding lead-out component outside the bracket assembly.

2. The bracket assembly according to claim 1, characterized in that: The conductive component is configured to move relative to the mounting seat on the X-axis and / or the Y-axis and / or the Z-axis when subjected to an external action, and is configured to automatically reset after the external action disappears; And / or, the first end has a first conductive surface, the battery pack has a second conductive surface, the first conductive surface is used to contact and conduct with the second conductive surface, and when conducting, the second conductive surface is completely covered by the first conductive surface; And / or, the second end has a third conductive surface, and the grounding lead-out component outside the bracket assembly is connected to the third conductive surface and is in conduction with the third conductive surface; And / or, the conductive component includes a pole, the two ends of the pole are the first end and the second end respectively; the pole is configured to move relative to the mounting seat on the X-axis and / or Y-axis and / or Z-axis when subjected to the external action, and is configured to automatically reset after the external action disappears.

3. The bracket assembly according to claim 2, characterized in that: The conductive component further comprises an elastic member, which is sleeved on the pole, one end of the elastic member abuts against the pole, and the other end abuts against the mounting seat; the elastic member is used to drive the pole to automatically reset.

4. The bracket assembly according to claim 3, characterized in that: The diameter of one end of the elastic member abutting against the pole is smaller than the diameter of one end of the elastic member abutting against the mounting seat; Alternatively, the elastic member includes a narrow end and a wide end, the narrow end abuts against the pole, the wide end abuts against the mounting seat, the inner ring of the elastic member gradually narrows from the wide end to the narrow end, and the outer ring of the elastic member gradually narrows from the wide end to the narrow end; And / or, the pole comprises a first pole section and a first limiting portion, the first limiting portion is located at one end of the first pole section; the mounting seat comprises a second limiting portion; the elastic member is sleeved on the first pole section, and two ends of the elastic member abut against the first limiting portion and the second limiting portion respectively; And / or, the outer wall of the second end has a slot, the conductive component also includes a limiting ring that is locked in the slot, the limiting ring and the mounting seat limit each other, and the elastic member is compressed between the mounting seat and the pole, the limiting ring and the elastic member cooperate with each other to limit the pole from detaching from the mounting seat.

5. The bracket assembly according to claim 4, characterized in that: The first limiting portion is an annular structure or a convex structure uniformly distributed around the circumference of the first column segment; And / or, the second limiting portion is an annular structure or a plurality of convex structures arranged at intervals; And / or, the pole further comprises a second pole segment, one end of the second pole segment is connected to the first pole segment, and the other end is connected to the first end portion; wherein: the cylindrical surface of the second pole segment has at least one set of mounting planes arranged opposite to each other, and / or, the cylindrical surface of the second pole segment protrudes from the cylindrical surface of the first pole segment, and / or, the outer surface of the first end portion protrudes from the cylindrical surface of the second pole segment; And / or, the conductive component further comprises a fixing member, and the fixing member is used to press the grounding lead-out component outside the bracket assembly onto the second end portion; And / or, the mounting seat has a guide channel, and the conductive component passes through the mounting seat at the guide channel.

6. The bracket assembly according to claim 5, characterized in that: The fixing member comprises a shaft segment and a third limiting portion, the second end portion has a groove recessed in the axial direction, one end of the shaft segment is threadedly connected to the groove of the second end portion, the other end of the shaft segment is connected to the third limiting portion, and the side surface of the third limiting portion protrudes from the cylindrical surface of the shaft segment; And / or, the conductive component is configured to move axially along the guide channel and / or move radially along the guide channel when subjected to external force; And / or, the mounting seat comprises a flange body and a guide body, the flange body is connected to one end of the guide body, the flange body is detachably connected to the bracket body, and the flange body and the guide body together form the guide channel; the flange body or the guide body has the second limiting portion extending toward the center of the guide channel, the elastic member is compressed between the second limiting portion and the first limiting portion, and applies a force extending from the flange body toward the guide body to the pole; Preferably, the mounting seat further comprises a limiting body, which is arranged at the end of the guide channel on the flange body and is used to limit the conductive component from being separated from the guide channel.

7. An electric vehicle, characterized in that: It comprises a bracket assembly and a battery pack as described in any one of claims 1 to 6.

8. The electric vehicle according to claim 7, characterized in that: The battery pack includes a battery box and a grounding component, wherein the grounding component is arranged on the battery box and is used to guide the charge on the battery box to a grounding device.

9. The electric vehicle according to claim 8, characterized in that: The grounding assembly includes a conductive member, which is detachably connected to the battery box, and the conductive member is in surface contact and conduction with the grounding device; Preferably, the battery box has a boss, and the conductive member is connected to the free end of the boss via a fastener.

10. The electric vehicle according to any one of claims 8 to 9, characterized in that: The battery pack is mounted on the bracket assembly, and the charge on the battery pack is introduced into the grounding lead-out component on the electric vehicle through the grounding component and the grounding device.

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