Quick-change battery box and electric vehicle containing the same

Abstract

The present invention discloses a quick-change battery box and an electric vehicle comprising the same. The quick-change battery box comprises: an outer shell, one or more battery modules, and a heat-conducting plate. The battery module is arranged in the outer shell, and the heat-conducting plate is arranged below the battery module, and a gap is formed between the upper wall of the heat-conducting plate and the bottom wall of the outer shell. The quick-change battery box can buffer the impact from the bottom of the vehicle through the gap formed between the aluminum plate and the bottom wall of the outer shell, thereby avoiding damage to the battery module inside the quick-change battery box. The electric vehicle has the same effect as above.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicles, and in particular to a quick-change battery box and an electric vehicle comprising the same. Background Art

[0002] At present, automobile exhaust emissions are still an important factor in environmental pollution. In order to control automobile exhaust, people have developed natural cars, hydrogen fuel cars, solar cars and electric cars to replace fuel-powered cars. Among them, electric cars have the most promising application prospects. At present, electric cars mainly include direct charging and quick-change types.

[0003] Quick-swap electric vehicles do not need to spend a long time charging. After the battery is exhausted, the electric vehicle can continue to drive by quickly replacing the battery pack, which is more suitable for use in public transportation.

[0004] The battery pack of a quick-swap electric vehicle has certain requirements for capacity and stability. Since the battery pack is generally installed at the bottom of the electric vehicle, it is easy to collide with flying stones and other debris on the ground, so a certain buffer is needed at the bottom.

[0005] In addition, the battery pack needs to dissipate heat, which can be in the form of liquid cooling, air cooling and natural cooling. Most existing battery packs dissipate heat through liquid cooling and air cooling. However, the battery packs of some electric vehicles are located at the bottom of the electric vehicle where the airflow is strong, so they only need to dissipate heat naturally. Battery packs of this design are relatively rare in the prior art. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a quick-change battery box and an electric vehicle comprising the same.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A quick-change battery box, comprising: an outer shell, one or more battery modules, and a heat conducting plate;

[0009] The battery module is disposed in the outer shell, the heat conducting plate is disposed below the battery module, and a gap is formed between an upper wall of the heat conducting plate and a bottom wall of the outer shell.

[0010] This technical solution has the following technical effects: the quick-change battery box can buffer the impact from the bottom of the vehicle and avoid damage to the battery module inside the quick-change battery box through the gap formed between the aluminum plate and the bottom wall of the outer shell.

[0011] Preferably, the heat conducting plate is a cavity structure having a plurality of spacers, and the gap is formed between the upper wall of the heat conducting plate and the bottom wall of the outer shell through the cavity structure.

[0012] This further technical solution has the following technical effects: the heat conducting plate directly forms a cavity structure, thereby facilitating manufacturing and installation relative to the quick-change battery box.

[0013] Preferably, a plurality of the gaps are formed in the heat conducting plate, and the plurality of the gaps are strip structures parallel to each other.

[0014] This further technical solution has the following technical effects: parallel strip structures are formed in the heat conducting plate, making the manufacture of the heat conducting plate easier.

[0015] Preferably, the lower surface of the heat conducting plate is connected to the inner bottom surface of the bottom wall of the outer shell.

[0016] This further technical solution has the following technical effect: the impact of the bottom wall can be transmitted to the heat conducting plate.

[0017] Preferably, the heat conducting plate is a solid flat plate structure, and the gap is formed between the lower surface of the heat conducting plate and the bottom wall of the outer shell.

[0018] This further technical solution has the following technical effects: providing a gap formation solution.

[0019] Preferably, the heat conducting plate is connected to the bottom wall of the outer shell through a fastener.

[0020] This further technical solution has the following technical effect: the fastener connection strengthens the connection between the heat conducting plate and the outer shell.

[0021] Preferably, a plurality of reinforcing ribs are provided on the bottom wall of the outer shell, and the heat conducting plate is fixed to the reinforcing ribs.

[0022] This further technical solution has the following technical effects: the heat conducting plate is fixed to the reinforcing rib, avoiding the need to provide a step surface for fastening on the bottom wall and also strengthening the bottom wall.

[0023] Preferably, a plurality of ribs are provided on the lower surface of the heat conducting plate, and the heat conducting plate is fixed to the bottom wall of the outer shell through the ribs connected to the reinforcing ribs.

[0024] This further technical solution has the following technical effects: the connection portion of the heat conducting plate is prone to low strength due to drilling, etc., and the strength of the heat conducting plate can be increased by providing ribs on the heat conducting plate to connect the heat conducting plate.

[0025] Preferably, the outer shell includes an upper cover and a lower box body, and the lower box body includes the bottom wall.

[0026] This further technical solution has the following technical effects: the outer shell is a split structure, which can be easily assembled.

[0027] Preferably, the upper cover comprises a protruding portion and a flat portion;

[0028] The planar portion is provided with an opening, the protrusion extends and protrudes from the opening toward an end away from the battery module to form a accommodating cavity, the protrusion is detachably connected to the opening, and the accommodating cavity is used to accommodate the electrical box of the quick-change battery box.

[0029] This further technical solution has the following technical effects: the quick-change battery box detachably connects the protruding portion of the upper cover for accommodating the electrical box with the flat portion, thereby avoiding the problem of difficulty in deep drawing of the upper cover and saving the manufacturing cost of the quick-change battery box.

[0030] Preferably, the lower box body further includes a side wall, the side wall extends upward from the edge of the bottom wall, and the lower box body is formed in one piece.

[0031] This further technical solution has the following technical effects: the lower box body forms a accommodating cavity through the side wall, which is convenient for accommodating the battery module therein.

[0032] Preferably, the reinforcing ribs are arranged along the length direction and width direction of the quick-change battery box.

[0033] This further technical solution has the following technical effects: the reinforcing ribs can simultaneously increase the strength of the quick-change battery box in both the length and width directions.

[0034] Preferably, both ends of the reinforcing rib are welded to the side walls of the quick-change battery box, and the middle part of the reinforcing rib is fixed to the bottom wall by rivets or bolts.

[0035] This further technical solution has the following technical effects: through the above method, the reinforcing rib can be conveniently and firmly connected to the side wall of the quick-change battery box.

[0036] Preferably, the heat conducting plate is made of aluminum or aluminum alloy.

[0037] This further technical solution has the following technical effects: aluminum or aluminum alloy is light but has good strength and thermal conductivity, and is suitable for making heat-conducting plates.

[0038] Preferably, the quick-change battery box further comprises a sealing gasket, which is disposed between the upper cover and the lower box body along a connection position between the upper cover and the lower box body.

[0039] This further technical solution has the following technical effects: by providing a sealing gasket, external dust and the like can be prevented from entering the quick-change battery box and damaging the battery module.

[0040] Preferably, the quick-change battery box further comprises an electrical connector, and the electrical connector is disposed on a side wall of the outer shell.

[0041] This further technical solution has the following technical effects: the quick-change battery box is electrically connected to the electric vehicle through the electrical connector.

[0042] An electric vehicle comprises the quick-change battery box as described above.

[0043] This technical solution has the following technical effects: the quick-change battery box of the electric vehicle can buffer the impact from the bottom of the vehicle through the gap formed between the aluminum plate and the bottom wall of the outer shell, thereby avoiding damage to the battery module inside the quick-change battery box.

[0044] Preferably, the electric vehicle comprises a quick-change bracket, and the quick-change battery box is engaged with the quick-change bracket.

[0045] This further technical solution has the following technical effects: the quick-change battery box of the electric vehicle is installed on the quick-change bracket and thus installed on the electric vehicle.

[0046] Preferably, a locking member is provided on the inner side surface of the quick-change bracket, and the locking member is adapted to the locking member on the quick-change battery box.

[0047] This further technical solution has the following technical effects: the quick-change battery box is installed on the quick-change bracket through the locking components and the locking components that adapt to each other.

[0048] Preferably, one or more sensors are provided on the quick-change bracket, and a positioning mark corresponding to the sensor is provided on the quick-change battery box, and the sensor is used to sense the positioning mark.

[0049] This further technical solution has the following technical effects: by providing a plurality of sensors, the quick-change battery box can be accurately positioned relative to the quick-change bracket.

[0050] Preferably, the quick-change bracket is also provided with a wiring harness arranged along the frame of the quick-change bracket, and the wiring harness is used to electrically connect the sensor to the electronic control system of the electric vehicle.

[0051] This further technical solution has the following technical effect: the sensor is electrically connected to the electronic control system of the electric vehicle through a wiring harness.

[0052] Preferably, one or more sensors are provided on the quick-change battery box, and a positioning mark corresponding to the sensor is provided on the quick-change bracket, and the sensor is used to sense the positioning mark.

[0053] This further technical solution has the following technical effects: by providing a plurality of sensors, the quick-change battery box can be accurately positioned relative to the quick-change bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the three-dimensional structure of the quick-change battery box according to Example 1 of the present invention.

[0055] Figure 2 It is a schematic diagram of the exploded structure of the quick-change battery box according to Example 1 of the present invention.

[0056] Figure 3 It is a schematic diagram of the three-dimensional structure of the quick-change battery box according to Example 1 of the present invention, in which the upper cover is removed.

[0057] Figure 4 It is a schematic diagram of the three-dimensional structure of the quick-change battery box according to Example 1 of the present invention, wherein the battery module and the upper cover are removed.

[0058] Figure 5 It is a schematic diagram of the three-dimensional structure of the lower box according to Example 1 of the present invention.

[0059] Figure 6 It is a schematic diagram of the three-dimensional structure of the lower box body observed from below according to Example 1 of the present invention.

[0060] Figure 7 Schematic diagram of the three-dimensional structure of the heat conducting plate according to Example 1 of the present invention.

[0061] Figure 8 It is a schematic diagram of the three-dimensional structure of the upper cover according to Example 2 of the present invention.

[0062] Fig. 9 It is a schematic diagram of the three-dimensional structure of the upper cover observed from below according to Embodiment 2 of the present invention.

[0063] Fig.10 It is a schematic diagram of the exploded structure of the upper cover according to Example 2 of the present invention.

[0064] Fig.11 Schematic diagram of the three-dimensional structure of the heat conducting plate according to Example 3 of the present invention.

[0065] Fig.12 It is a schematic diagram of the three-dimensional structure of the lower box according to Example 3 of the present invention.

[0066] Fig.13 It is a schematic diagram of the three-dimensional structure of the lower box body observed from below according to Example 3 of the present invention.

[0067] Fig.14 It is a schematic diagram of the three-dimensional structure of the lower box according to Example 4 of the present invention.

[0068] Fig.15 Schematic diagram of the three-dimensional structure of the lower box when viewed from below according to Example 4 of the present invention.

[0069] Fig.16 It is a schematic diagram of the three-dimensional structure of the bottom guard plate according to Example 4 of the present invention.

[0070] Fig.17 It is a schematic diagram of the three-dimensional structure of the lower box body when observed from below according to Example 4 of the present invention, wherein the bottom guard plate is removed.

[0071] Fig.18 It is a schematic structural diagram of the bottom guard plate according to Example 5 of the present invention.

[0072] Fig.19 for Fig.18 Schematic diagram of the enlarged structure of part A.

[0073] Description of reference numerals:

[0074] Quick-change battery box 100

[0075] Outer shell 101

[0076] Upper cover 102

[0077] Upper wall 103

[0078] Side wall 104

[0079] Protrusion 105

[0080] First flange 106

[0081] Second flange 107

[0082] Plane portion 108

[0083] Lower box 109

[0084] Reinforcement rib / first reinforcement rib 113

[0085] Horizontal rib 114

[0086] Longitudinal reinforcement 115

[0087] Fixing hole 116

[0088] Bottom wall 117

[0089] Side wall 118

[0090] Groove 119

[0091] Step 120

[0092] Bottom guard plate 121

[0093] Board 1211

[0094] Assembly Department 1212

[0095] Battery module 123

[0096] Heat conducting plate 125

[0097] Spacer 127

[0098] Locking member 131

[0099] Electrical connector 135

[0100] Second reinforcement rib 141 DETAILED DESCRIPTION

[0101] The present invention is further described below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0102] Example 1

[0103] like Figure 1-7 As shown, the quick-change battery box 100 of this embodiment includes: an outer shell 101 , one or more battery modules 123 and a heat conducting plate 125 .

[0104] The outer shell 101 includes an upper cover 102 and a lower box body 109 .

[0105] In this embodiment, the outer shell 101 is a top-bottom structure.

[0106] Optionally, the outer shell 101 may also adopt other split structures that can accommodate the battery module.

[0107] See also Figure 3 The outer shell 101 contains a battery module 123 , and the battery module 123 is laid in the lower box 109 .

[0108] Generally speaking, the battery modules 123 are laid out in only one layer in the vertical direction.

[0109] In this implementation, if Figure 3 As shown, only six battery modules 123 are laid, but the present invention is not limited thereto, and those skilled in the art can select the number of battery modules 123 as needed.

[0110] like Figure 4 As shown, a heat conducting plate 125 is disposed below the battery module 123 .

[0111] In this embodiment, the heat conducting plate 125 is multiple, and one is provided for each battery module 123. However, the present invention is not limited thereto, and the heat conducting plate 125 may also be a whole piece, or multiple pieces are provided for each battery module 123, or one piece is provided for multiple battery modules 123.

[0112] The heat conducting plate 125 is a cavity structure having a plurality of spacers 127, and a gap is formed between the upper wall of the heat conducting plate 125 and the bottom wall of the outer shell 101 through the cavity structure. The heat conducting plate 125 directly forms a cavity structure, which is convenient for manufacturing and installation relative to the quick-change battery box 100.

[0113] like Figure 7 As shown, a plurality of gaps (spacers 127) are formed in the heat conducting plate 125, and the plurality of gaps are parallel strip structures. The formation of the parallel strip structures in the heat conducting plate 125 makes the manufacture of the heat conducting plate 125 easier. The plurality of gaps are separated by a plurality of partitions arranged in parallel, and the arrangement of the partitions improves the support strength of the heat conducting plate 125.

[0114] Optionally, the gap in the heat conducting plate 125 may also be in other shapes, such as an “L” shape, an “S” shape, etc.

[0115] like Figure 6 As shown, the heat conducting plate 125 is disposed in the lower box 109. In the lower box 109, the reinforcing ribs 113 are arranged along the length direction and the width direction of the quick-change battery box 100. The reinforcing ribs 113 can increase the strength of the quick-change battery box 100 in both the length direction and the width direction.

[0116] Both ends of the reinforcing rib 113 are welded to the side wall 118 of the quick-change battery box 100, and the middle part of the reinforcing rib 113 is fixed to the bottom wall by rivets or bolts.

[0117] The reinforcing ribs 113 include transverse ribs 114 and longitudinal ribs 115. The transverse ribs 114 are laid on the inner bottom surface of the bottom wall 117 of the lower box 109 along the width direction of the lower box 109. Both ends of the transverse ribs 114 are connected to the side walls 118 of the lower box 109. The transverse ribs 114 are provided with a plurality of mounting holes so as to fix the transverse ribs 114 to the bottom wall 117 of the lower box 109. The longitudinal ribs 115 extend in the length direction of the lower box 109 and are laid on the upper surface of the bottom wall 117 of the lower box 109. The longitudinal ribs 115 are arranged through the transverse ribs 114, and both ends of the longitudinal ribs 115 are also connected to the side walls 118 of the lower box 109. The longitudinal ribs 115 are fixed by passing through the transverse ribs 114.

[0118] The transverse ribs 114 and the longitudinal ribs 115 and the side wall 118 of the lower box body 109 form a plurality of spaced heat conducting plate 125 mounting areas, and the heat conducting plate 125 mounting areas form a plane for bonding the heat conducting plate 125. Figure 6As shown, the plane is formed by protruding upward from the bottom wall 117 of the lower case 109 .

[0119] The heat conducting plate 125 is preferably connected to the inner bottom surface of the lower box 109 by bonding. Of course, the heat conducting plate 125 can also be connected to the upper surface of the lower box 109 by other means, such as snap connection and threaded connection. The heat conducting plate 125 is connected to the upper surface of the bottom wall 117 of the lower box 109, so that the impact on the bottom wall 117 of the lower box 109 can be transmitted to the heat conducting plate 125.

[0120] The material of the heat conducting plate 125 is preferably aluminum or aluminum alloy. Aluminum or aluminum alloy is relatively light but has good strength and thermal conductivity, and is suitable for making the heat conducting plate 125 .

[0121] In this embodiment, the quick-change battery box 100 can buffer the impact from the bottom of the vehicle and avoid damage to the battery module 123 inside the quick-change battery box 100 by forming a gap between the aluminum plate and the bottom wall of the outer shell 101 (the lower box 109), that is, the gap formed in the heat conductive plate 125. At the same time, the heat conductive plate 125 can also provide heat insulation. For example, in cold weather, it can isolate the heat transfer between the outside and the inside of the quick-change battery box 100 to a certain extent, thereby preventing the temperature of the battery module 123 from being too low. At the same time, the heat conductive plate 125 is attached to the battery module 123, which plays a heat conductive role, so that the heat of the battery module 123 is evenly distributed.

[0122] The quick-change battery box 100 further includes a sealing gasket (not shown in the figure), which is disposed between the upper cover 102 and the lower box body 109 along the connection position between the upper cover 102 and the lower box body 109 .

[0123] By providing a sealing gasket to enhance the sealing between the upper cover 102 and the lower box body 109 , it is possible to prevent external dust and the like from entering the quick-change battery box 100 and damaging the battery module 123 .

[0124] like Figure 4 As shown, the quick-change battery box 100 further includes an electrical connector 135, which is disposed on the side wall 118 of the outer shell 101. Through the electrical connector 135, the quick-change battery box 100 is electrically connected to the electric vehicle.

[0125] This embodiment also provides an electric vehicle, which includes the quick-change battery box 100 as described above.

[0126] The quick-change battery box 100 of the electric vehicle can buffer the impact from the bottom of the vehicle through the gap formed between the aluminum plate and the bottom wall of the outer shell 101, thereby avoiding damage to the battery module 123 inside the quick-change battery box 100.

[0127] The electric vehicle includes a quick-change bracket, and the quick-change battery box 100 is connected to the quick-change bracket.

[0128] The quick-change battery box 100 of the electric vehicle is installed on a quick-change bracket and thus installed on the electric vehicle.

[0129] A locking member is provided on the inner side surface of the quick-change bracket, and the locking member is adapted to the locking member 131 on the quick-change battery box 100 .

[0130] The quick-change battery box 100 is installed on the quick-change bracket by means of the locking member and the locking member 131 that are adapted to each other.

[0131] One or more sensors (not shown in the figure) are arranged on the quick-change bracket, and positioning marks corresponding to the sensors are arranged on the quick-change battery box 100, and the sensors are used to sense the positioning marks.

[0132] Optionally, one or more sensors may be provided on the quick-change battery box 100, and positioning marks corresponding to the sensors may be provided on the quick-change bracket, and the sensors are used to sense the positioning marks.

[0133] By providing a plurality of sensors, the quick-change battery box 100 can be accurately positioned relative to the quick-change bracket.

[0134] The quick-change bracket is also provided with a wiring harness arranged along the frame of the quick-change bracket, and the wiring harness is used to electrically connect the sensor to the electronic control system of the electric vehicle.

[0135] The sensor is electrically connected to the electric vehicle's electronic control system via a wiring harness.

[0136] Example 2

[0137] The quick-change battery box of Example 2 is similar to the quick-change battery box of Example 1, except that:

[0138] like Figure 8-10 As shown, the upper cover 102 includes a protruding portion 105 and a flat portion 108 .

[0139] The planar portion 108 is provided with an opening, and the protrusion 105 extends and protrudes from the opening toward an end away from the battery module 123 to form a receiving cavity. The protrusion 105 is detachably connected to the opening, and the receiving cavity is used to receive the electrical box of the quick-change battery box 100 .

[0140] The quick-change battery box 100 detachably connects the protrusion 105 of the upper cover 102 for accommodating the electrical box with the flat portion 108 , thereby avoiding the problem that the upper cover 102 is difficult to be drawn and processing, and saving the manufacturing cost of the quick-change battery box 100 .

[0141] The protrusion 105 is preferably integrally formed. Preferably, the protrusion 105 is a metal casting or injection molding.

[0142] In this embodiment, if Fig. 9 As shown, the protrusion 105 is threadedly connected to the plane portion 108. However, the present invention is not limited thereto, and the protrusion 105 can also be bonded to the plane portion 108.

[0143] In this embodiment, the protrusion 105 is substantially square to match the shape of the electrical box contained therein. Alternatively, if the electrical box is in other shapes, the protrusion 105 can also be adapted to the electrical box and modified.

[0144] like Fig.10 As shown, the protrusion 105 includes a first flange 106 for connection, the first flange 106 surrounds the circumference of the protrusion 105, the protrusion 105 is inserted into the opening from the lower side of the planar portion 108, the first flange 106 abuts against the lower surface of the planar portion 108 and the edge of the opening, and fasteners such as bolts fix the protrusion 105 to the planar portion 108 by connecting the flange and the planar portion 108.

[0145] The protrusion 105 is inserted into the opening from the lower side of the plane portion 108 , thereby further preventing the protrusion 105 from coming out of the plane portion 108 through the opening.

[0146] The surface of the plane portion 108 is a substantially plane, but not an absolutely plane, and textures and holes may be provided thereon as required.

[0147] The plane portion 108 includes an upper wall 103 and a side wall 104 extending downward from the upper wall 103, and an opening is provided at the upper wall 103. The side wall 104 surrounds the entire outer edge of the upper wall 103 to form a closed battery box.

[0148] A second flange 107 is provided at the lower edge of the side wall 104 to facilitate connection with the lower box body 109 .

[0149] Example 3

[0150] The quick-change battery box of Example 3 is similar to the quick-change battery box of Example 1, except that:

[0151] like Figure 11-13 As shown ( Fig.13 The heat conducting plate 125 is a solid flat plate structure, and a gap is formed between the lower surface of the heat conducting plate 125 and the bottom wall 117 of the outer shell 101.

[0152] The heat conducting plate 125 is connected to the bottom wall of the outer shell 101 by fasteners. The fastener connection strengthens the connection between the heat conducting plate 125 and the outer shell 101.

[0153] A plurality of reinforcing ribs 113 are provided on the bottom wall of the outer shell 101 (the lower box body 109 ), and the heat conducting plate 125 is fixed to the reinforcing ribs 113 .

[0154] like Fig.12 As shown, the reinforcing ribs 113 divide the gap between the heat conducting plate 125 and the bottom wall 117 into a plurality of different spaces, and also play a role in separating the lower surface of the heat conducting plate 125 and the bottom wall 117 of the outer shell 101 in the vertical direction to form the above-mentioned gap. Alternatively, the gap between the lower surface of the heat conducting plate 125 and the bottom wall 117 of the outer shell 101 can also be achieved by setting other components.

[0155] The heat conducting plate 125 is fixed to the reinforcing rib 113, so that it is not necessary to provide a step surface for fastening on the bottom wall and the bottom wall is strengthened.

[0156] The reinforcing ribs 113 include transverse ribs 114 and longitudinal ribs 115. The transverse ribs 114 are laid on the upper surface of the bottom wall 117 of the lower box 109 along the width direction of the lower box 109. Both ends of the transverse ribs 114 are connected to the side walls 118 of the lower box 109. The transverse ribs 114 are provided with a plurality of mounting holes so as to fix the transverse ribs 114 to the bottom wall 117 of the lower box 109. The longitudinal ribs 115 extend in the length direction of the lower box 109 and are laid on the upper surface of the bottom wall 117 of the lower box 109. The longitudinal ribs 115 pass through the transverse ribs 114, and both ends of the longitudinal ribs 115 are also connected to the side walls 118 of the lower box 109. Both the longitudinal ribs 115 and the transverse ribs 114 are fixed to the bottom wall 117 of the lower box 109 through a plurality of mounting holes provided thereon.

[0157] A plurality of fixing holes 116 are provided on the upper surfaces of the longitudinal ribs 115 and the transverse ribs 114 , and corresponding mounting holes are also provided at corresponding positions of the heat conducting plate 125 , so that the heat conducting plate 125 is fixed to the reinforcing ribs 113 by fasteners such as bolts passing through the mounting holes and the fixing holes 116 in sequence.

[0158] In this embodiment, the heat conducting plate 125 extends along the width direction of the lower box body 109 and its width is the same as the width of the interior of the lower box body 109, and is arranged in the length direction of the lower box body 109. When multiple battery modules are arranged in the width direction, the heat conducting plate 125 contacts the multiple battery modules at the same time, so that heat transfer is formed between the multiple battery modules, so that the heat is evenly distributed among the multiple battery modules.

[0159] Except for the surface where the reinforcing ribs 113 are installed, the rest of the surfaces of the bottom wall 117 of the lower box body 109 protrude upward from the lower side, but a certain gap is still formed between the protruding plane and the heat conducting plate 125 .

[0160] In this embodiment, the heat conducting plate 125 is in the shape of a flat plate, but optionally, a plurality of ribs are provided on the lower surface of the heat conducting plate 125, and the heat conducting plate 125 is fixed to the bottom wall of the outer shell 101 through the ribs connected to the reinforcing ribs 113. The connection portion of the heat conducting plate 125 is likely to have low strength due to drilling, etc., and the strength of the heat conducting plate 125 can be increased by providing ribs on the heat conducting plate 125 to connect the heat conducting plate 125.

[0161] In this embodiment, the quick-change battery box 100 forms a gap between the heat conductive plate 125 and the bottom wall 117 of the lower box body 109, which can buffer the impact from the bottom of the vehicle and prevent damage to the battery module inside the quick-change battery box 100. At the same time, the heat conductive plate 125 can also provide heat insulation. For example, in cold weather, it can isolate the heat transfer between the outside and the inside of the quick-change battery box 100 to a certain extent, thereby preventing the temperature of the battery module from being too low. At the same time, the heat conductive plate 125 fits the battery module and plays a heat conductive role, so that the heat of the battery module is evenly distributed.

[0162] Example 4

[0163] The quick-change battery box of Example 4 is substantially the same as the quick-change battery box of Example 1, except that:

[0164] like Figure 14-17 As shown, the outer bottom surface of the lower box body 109 of the quick-change battery box 100 forms an upwardly recessed groove 119 , and the bottom guard plate 121 is connected to the bottom of the outer box body 101 and covers the opening of the groove 119 .

[0165] The gap between the bottom guard plate 121 and the bottom wall 117 of the lower box 109 can buffer the impact from the bottom of the vehicle and prevent the battery module 123 inside the quick-change battery box 100 from being damaged. At the same time, the bottom guard plate 121 can also provide heat insulation. For example, in cold weather, it can isolate the heat transfer between the outside and the inside of the quick-change battery box 100 to a certain extent, thereby preventing the temperature of the battery module 123 from being too low.

[0166] The inner bottom surface of the bottom wall 117 of the lower case 109 , that is, the upper surface of the bottom wall of the groove 119 formed on the inner bottom surface of the bottom wall 117 due to the formation of the groove 119 , is connected to the battery module 123 .

[0167] The battery module 123 may be directly connected to the plane, or a heat conducting plate 125 as in Embodiment 1 or 3 may be provided between the battery module and the plane so that heat can be conducted between the battery modules, or a heat sink may be provided to improve the heat dissipation of the battery module. A water cooling or air cooling channel may be provided in the heat sink.

[0168] One groove 119 is provided for each battery module. Of course, optionally, each groove 119 may correspond to a plurality of battery modules, or a plurality of battery modules may correspond to one groove 119 .

[0169] See also Fig.14 A plurality of first reinforcing ribs 113 are provided on the inner bottom surface of the bottom wall 117 of the lower box body 109 .

[0170] The first reinforcing rib 113 includes a transverse rib 114 and a longitudinal rib 115. The transverse rib 114 is laid on the upper surface of the bottom wall 117 of the lower box 109 along the width direction of the lower box 109. Both ends of the transverse rib 114 are connected to the side wall 118 of the lower box 109. The transverse rib 114 is provided with a plurality of mounting holes so that the transverse rib 114 can be fixed to the bottom wall 117 of the lower box 109 by fasteners such as bolts. The longitudinal rib 115 extends in the length direction of the lower box 109 and is laid on the inner bottom surface of the bottom wall 117 of the lower box 109. The longitudinal rib 115 passes through the transverse rib 114, and both ends of the longitudinal rib 115 are also connected to the side wall 118 of the lower box 109. Both the longitudinal rib 115 and the transverse rib 114 are fixed to the bottom wall 117 of the lower box 109 through a plurality of mounting holes provided thereon. The groove 119 is formed in the area surrounded by these longitudinal ribs 115 and transverse ribs 114 .

[0171] The transverse rib 114 is formed into a structure that is high in the middle and low at both ends. The design of low ends can avoid interference with the installation of the upper cover.

[0172] Both ends of the transverse rib 114 are connected to the lower box body 109 via a reinforcing plate.

[0173] See also Fig.17 A plurality of second reinforcing ribs 141 are provided on the outer bottom surface of the bottom wall 117 of the lower box body 109 , and fixing holes are provided on the second reinforcing ribs 141 so as to fix the bottom guard plate 121 to the lower box body 109 .

[0174] Fig.17 A layout of the second reinforcing ribs 141 is provided, but the present invention is not limited thereto, and the second reinforcing ribs 141 may adopt other feasible layouts.

[0175] Optionally, the bottom guard plate 121 may also be fixed by the step portion 120 formed between the grooves 119 , that is, the bottom guard plate 121 is fixed to the step portion 120 .

[0176] The bottom guard plate 121 may be Fig.16 The one-piece structure shown is preferably integrally formed.

[0177] In this embodiment, the gap formed between the bottom guard plate and the bottom wall of the lower box of the quick-change battery box can buffer the impact from the bottom of the vehicle and prevent the battery module inside the quick-change battery box from being damaged. At the same time, the gap can also provide heat insulation. For example, in cold weather, it can isolate the heat transfer between the outside and the inside of the quick-change battery box to a certain extent, thereby preventing the temperature of the battery module from being too low.

[0178] Example 5

[0179] The structure of the quick-change battery box of this embodiment is substantially the same as that of the quick-change battery box of Embodiment 4, except that:

[0180] The bottom guard plate 121 may also be Fig.18 The multi-piece structure shown is formed by splicing two plates 1211.

[0181] The joints of the two plates 1211 are formed into a mutually interlocking structure, such as Fig.19 As shown, the recess formed between two adjacent assembly parts 1212 of one plate 1211 just receives the assembly part 1212 of another plate 1211, so that the two plates 1211 form a tight fit, and screw holes are provided on the assembly parts 1212 for inserting fasteners such as screws to fix the plate to the bottom wall of the quick-change battery box.

[0182] The bottom guard plate is formed by splicing a plurality of plates. A single plate is small in size, occupies a small space, is easy to manufacture and store, and avoids excessive bending stress caused by a single plate.

[0183] This embodiment illustrates a two-piece structure. Optionally, the bottom guard plate 121 may also be composed of more than three plates.

[0184] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship of the device or component in normal use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation at all times, and therefore cannot be understood as a limitation of the present invention in this regard.

[0185] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration 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 quick-change battery box, characterized in that: It includes: An outer shell, one or more battery modules, and a heat conducting plate; The battery module is arranged in the outer shell, the heat conducting plate is arranged below the battery module, and a gap is formed between the upper wall of the heat conducting plate and the bottom wall of the outer shell; The heat conducting plate is arranged between the bottom wall of the outer shell and the battery module; A plurality of reinforcing ribs are arranged on the bottom wall of the outer shell, and the reinforcing ribs include transverse ribs and longitudinal ribs. The transverse ribs, longitudinal ribs and the side wall of the outer shell form a plurality of spaced heat conducting plate installation areas, and the heat conducting plate is installed in the heat conducting plate installation areas.

2. The quick-change battery box according to claim 1, characterized in that: The heat conducting plate is a cavity structure having a plurality of spacers, and the gap is formed between the upper wall of the heat conducting plate and the bottom wall of the outer shell through the cavity structure.

3. The quick-change battery box according to claim 2, characterized in that: A plurality of gaps are formed in the heat conducting plate, and the plurality of gaps are strip structures parallel to each other.

4. The quick-change battery box according to claim 2, characterized in that: The lower surface of the heat conducting plate is connected to the inner bottom surface of the bottom wall of the outer shell.

5. The quick-change battery box according to claim 1, characterized in that: The heat conducting plate is a solid flat plate structure.

6. The quick-change battery box according to claim 1, characterized in that: The heat conducting plate is connected to the bottom wall of the outer shell through a fastener.

7. The quick-change battery box according to claim 6, characterized in that: The heat conducting plate is fixed to the reinforcing rib.

8. The quick-change battery box according to claim 7, characterized in that: A plurality of ribs are arranged on the lower surface of the heat conducting plate, and the ribs are connected with the reinforcing ribs, and the heat conducting plate is fixed to the bottom wall of the outer shell.

9. The quick-change battery box according to claim 1, characterized in that: The outer shell includes an upper cover and a lower box body, the lower box body includes the bottom wall, and the upper cover includes a protruding portion and a flat portion; The planar portion is provided with an opening, the protrusion extends and protrudes from the opening toward an end away from the battery module to form a accommodating cavity, the protrusion is detachably connected to the opening, and the accommodating cavity is used to accommodate the electrical box of the quick-change battery box.

10. The quick-change battery box according to claim 7, characterized in that: The reinforcing ribs are arranged along the length direction and the width direction of the quick-change battery box.

11. The quick-change battery box according to claim 10, characterized in that: Both ends of the reinforcing rib are welded to the side walls of the quick-change battery box, and the middle part of the reinforcing rib is fixed to the bottom wall by rivets or bolts.

12. The quick-change battery box according to claim 1, characterized in that: The material of the heat conducting plate is aluminum or aluminum alloy.

13. The quick-change battery box according to claim 9, characterized in that: The quick-change battery box further includes a sealing gasket, which is disposed between the upper cover and the lower box along a connection position between the upper cover and the lower box; And / or, the quick-change battery box also includes an electrical connector, and the electrical connector is arranged on the side wall of the outer shell.

14. An electric vehicle, characterized in that: It comprises a quick-change battery box as described in any one of claims 1-13.

15. The electric vehicle according to claim 14, characterized in that: The electric vehicle comprises a quick-change bracket, and the quick-change battery box is engaged with the quick-change bracket.

16. The electric vehicle according to claim 15, characterized in that: The inner side surface of the quick-change bracket is provided with a locking component, and the locking component is adapted to the locking component on the quick-change battery box.

17. The electric vehicle according to claim 15, characterized in that: One or more sensors are arranged on the quick-change bracket, and a positioning mark corresponding to the sensor is arranged on the quick-change battery box, and the sensor is used to sense the positioning mark.

18. The electric vehicle according to claim 17, characterized in that: The quick-change bracket is also provided with a wiring harness arranged along the frame of the quick-change bracket, and the wiring harness is used to electrically connect the sensor to the electronic control system of the electric vehicle.

19. The electric vehicle according to claim 15, characterized in that: One or more sensors are arranged on the quick-change battery box, and a positioning mark corresponding to the sensor is arranged on the quick-change bracket, and the sensor is used to sense the positioning mark.

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