Battery box and battery pack

Abstract

The invention provides a battery box and a battery pack, the battery box comprises a frame body and a cross beam assembly, and the frame body defines a containing cavity; the mounting beam assembly is connected to the side, in the first direction, of the frame body and comprises a connecting structure connected with the frame body, the connecting structure and the frame body define a cavity, the connecting structure is provided with a first abutting face and a second abutting face, the first abutting face and the second abutting face both abut against the frame body, and the first abutting face is flush with the second abutting face. The connecting structure comprises at least two bent sections which are connected with each other, the bending directions of the adjacent bent sections are different, the yield strength of the connecting structure can be improved, and then the connecting strength of the connecting structure and the frame body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery box and a battery pack. BACKGROUND

[0002] The battery pack usually comprises a battery box and a battery, the battery box comprises a frame body with a containing cavity, the battery is installed in the containing cavity of the frame body, and a mounting beam assembly is further arranged on the outer side of the frame body to support the frame body through the mounting beam assembly. However, in the related art, the connection strength of the mounting beam assembly and the frame body is insufficient. SUMMARY

[0003] Embodiments of the present application provide a battery box and a battery pack, which can improve the technical problem of insufficient connection strength of the mounting beam assembly and the frame body of the battery box.

[0004] Embodiments of the present application provide a battery box, comprising: a frame body, which encloses a containing cavity; a mounting beam assembly connected to one side of the frame body along a first direction, the mounting beam assembly comprising a connecting structure connected to the frame body, the connecting structure and the frame body enclosing a cavity, the connecting structure being provided with a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface both abutting the frame body, and the first abutting surface and the second abutting surface being flush; the connecting structure comprising at least two curved segments connected to each other, and the curved directions of the adjacent curved segments being different.

[0005] In some embodiments, the connecting structure extends along a second direction, the connecting structure and the frame body enclosing the cavity extending along the second direction, and the second direction and the first direction forming an angle. In this way, the connecting structure and the frame body can form a cavity between different parts of the connecting structure along the second direction, which is beneficial to further reduce the stress concentration at the connection between the connecting structure and the frame body and improve the connection strength of the connecting structure and the frame body.

[0006] In some embodiments, the connecting structure comprises a first connecting plate and a second connecting plate arranged along a third direction, the first direction, the second direction and the third direction forming an angle with each other; the first connecting plate and the second connecting plate being connected to the frame body and enclosing the cavity, the first connecting plate comprising at least two curved segments connected to each other, and the curved directions of the adjacent curved segments being different, so as to improve the yield strength of the first connecting plate; and / or, the second connecting plate being at least partially curved towards the cavity or in a direction away from the cavity, so as to improve the yield strength of the second connecting plate.

[0007] In some embodiments, the first abutting surface is arranged on the first connecting plate, and the second abutting surface is arranged on the second connecting plate. In a cross section of the mounting beam assembly perpendicular to the second direction, an end point of the first abutting surface closest to the cavity is a first contact point, an end point of the second abutting surface closest to the cavity is a second contact point, and an end point of the contact surface of the first connecting plate and the second connecting plate closest to the cavity is a third contact point. An included angle θ between a line connecting the first contact point and the third contact point and a line connecting the second contact point and the third contact point is 30°-80°. Thus, the phenomenon of stress concentration at the connecting part of the mounting beam assembly and the frame body can be further reduced, and the use stability and service life of the mounting beam assembly during use can be improved.

[0008] In some embodiments, the distance between the first connecting plate and the second connecting plate has an increasing trend along the direction close to the frame body. Thus, the first connecting plate, the second connecting plate, and the side beam can form a structure approximately in the shape of a triangle, which can improve the structural stability of the first connecting plate, the second connecting plate, and the side beam, and further improve the connecting stability of the mounting beam assembly and the side beam.

[0009] In some embodiments, the first connecting plate is farther away from the bottom of the battery box than the second connecting plate; the first connecting plate comprises a first curved plate and a second curved plate connected in sequence along the direction close to the frame body, one of the first curved plate and the second curved plate is curved along the direction towards the cavity, and the other of the first curved plate and the second curved plate is curved along the direction away from the cavity. By making the bending directions of the first curved plate and the second curved plate of the first connecting plate opposite, the structural yield strength of the first connecting plate can be improved.

[0010] In some embodiments, the first curved plate is curved along the direction towards the cavity, and the second curved plate is curved along the direction away from the cavity, so that the bending of the first connecting plate is more convenient.

[0011] In some embodiments, the first connecting plate further comprises a third curved plate connected to an end of the second curved plate away from the first curved plate, one of the second curved plate and the third curved plate is curved along the direction towards the cavity, and the other of the second curved plate and the third curved plate is curved along the direction away from the cavity. Thus, the first connecting plate can have more bending structures, which can further improve the yield strength of the first connecting plate.

[0012] In some embodiments, the first curved panel has a length extending away from the frame body greater than or equal to 0.5 cm and less than or equal to 0.85 cm, so that the first curved panel has a higher yield strength while bending is more convenient; and / or, the second curved panel has a length extending away from the frame body greater than or equal to 0.6 cm and less than or equal to 1 cm, so that the second curved panel has a higher yield strength while bending is more convenient; and / or, the third curved panel has a length extending away from the frame body greater than or equal to 0.5 cm and less than or equal to 0.8 cm, so that the third curved panel has a higher yield strength while bending is more convenient.

[0013] In some embodiments, the sum of the lengths of the first curved panel, the second curved panel and the third curved panel extending away from the frame body is greater than or equal to 2 cm and less than or equal to 3 cm, so that the first curved panel, the second curved panel and the third curved panel are easy to bend while the yield strength of the first curved panel, the second curved panel and the third curved panel to the first connecting plate is effectively improved; and / or, the length of the second curved panel extending away from the frame body is greater than the lengths of the first curved panel and the third curved panel extending away from the frame body, so that the bending of the first curved panel, the second curved panel and the third curved panel is more convenient.

[0014] In some embodiments, the connecting structure extends in a second direction, and the cavity has a cross-sectional area perpendicular to the second direction greater than or equal to 2 cm2 and less than or equal to 5 cm2. In this way, the cavity can effectively reduce stress concentration at the connection between the connecting structure and the frame body, while avoiding the size of the cavity being too large to affect the connection strength of the connecting structure and the frame body.

[0015] Embodiments of the present application also provide a battery pack, comprising: a battery box, the battery box being as described above, the battery box comprising a frame body and a cross beam assembly, the frame body enclosing a receiving cavity; the cross beam assembly is connected to one side of the frame body in a first direction, the cross beam assembly comprising a connecting structure connected to the frame body, the connecting structure and the frame body enclosing a cavity, the connecting structure being provided with a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface both abutting the frame body, and the first abutting surface and the second abutting surface being flush; the connecting structure comprises at least two curved segments connected to each other, and the curved directions of the adjacent curved segments are different; a battery assembly comprising a plurality of batteries, the battery assembly being arranged in the receiving cavity of the battery box.

[0016] The beneficial effects of the embodiments of the present application are as follows: In the embodiments of the present application, by making the first abutting surface and the second abutting surface of the connecting structure of the mounting beam assembly flush and abutting with the frame body, the connecting structure and the frame body enclose a cavity, which can reduce stress concentration at the connection between the connecting structure and the frame body, and improve the connection strength and stability of the connecting structure and the frame body. At the same time, by making the connecting structure include at least two curved segments connected to each other, and the bending directions of the adjacent curved segments being different, the yield strength of the connecting structure can be improved, and thus the connection strength of the connecting structure and the frame body can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort based on these drawings.

[0018] Figure 1 Structure schematic diagram of an embodiment of the battery pack provided by the embodiments of the present application; Figure 2 Exploded structure schematic diagram of an embodiment of the battery pack provided by the embodiments of the present application; Figure 3 Structure schematic diagram of an embodiment of the frame body and the mounting beam assembly provided by the embodiments of the present application; Figure 4 Sectional view of an embodiment of the side beam provided by the embodiments of the present application, wherein the section plane is perpendicular to the second direction; Figure 5 Sectional view of an embodiment of the longitudinal beam provided by the embodiments of the present application, wherein the section plane is perpendicular to the second direction; Figure 6 Structure schematic diagram of an embodiment of the longitudinal beam provided by the embodiments of the present application; Figure 7 Figure 3 Sectional view along the A-A direction; Figure 8 Figure 7 Enlarged view of B in FIG. 6; Figure 9 Partial view of the sectional view of the frame body and the mounting beam assembly provided by the embodiments of the present application, wherein the section plane is parallel to the A-A direction; Figure 10 Figure 3 Enlarged view of A in FIG. 7; Figure 11 Partial enlarged view of the fixing structure, the connecting part and the protection part provided by the embodiments of the present application; ​​​Figure 12 A cross-sectional view of one embodiment of the cross beam provided by the embodiments of the present application, wherein the cross section is perpendicular to the first direction; Figure 13 A structural schematic diagram of one embodiment of the control assembly provided by the embodiments of the present application; Figure 14 An exploded structural schematic diagram of one embodiment of the control assembly provided by the embodiments of the present application; Figure 15 A structural schematic diagram of one embodiment of the bracket provided by the embodiments of the present application; Figure 16 A structural schematic diagram of one embodiment of the bottom plate assembly provided by the embodiments of the present application; Figure 17 A Figure 16 An enlarged view of C in the middle; Figure 18 An exploded structural schematic diagram of the bottom plate assembly provided by the embodiments of the present application; Figure 19 A Figure 18 An enlarged view of D in the middle; Figure 20 A structural schematic diagram of one embodiment of the bottom guard plate and the sealing member provided by the embodiments of the present application; Figure 21 A Figure 20 An enlarged view of E in the middle.

[0019] Explanation of the reference signs: 1 - battery pack; 10 - battery box; 11 - frame; 110 - containing cavity; 1101 - battery compartment; 1102 - electrical compartment; 111 - side beam; 1111 - side beam body; 1112 - first cavity; 1113 - first sub-cavity; 1114 - second sub-cavity; 1115 - first side wall; 1116 - first sub-side wall; 1117 - first connecting wall; 1118 - first support plate; 1119 - first connecting flange; 112 - longitudinal beam; 1121 - notch; 1122 - avoiding space; 1123 - longitudinal beam body; 1124 - second side wall; 1125 - second sub-side wall; 1126 - second connecting wall; 1127 - second connecting flange; 1128 - second cavity; 1129 - third sub-cavity; 1130 - fourth sub-cavity; 1131 - fifth sub-cavity; 1132 - second support plate; 1133 - overlapping wall; 1134 - third connecting flange; 1135 - first opening; 113 - front beam; 114 - rear beam; 115 - mounting beam assembly; 1150 - cavity; 1151 - mounting portion; 1152 - first mounting plate; 1153 - second mounting plate; 1154 - connecting structure; 1155 - first connecting plate; 1156 - first curved plate; 1157 - second curved plate; 1158 - third curved plate; 1159 - second connecting plate; 1160 - first connecting portion; 1161 - second connecting portion; 1162 - reinforcing rib; 1163 - first abutting surface; 1164 - second abutting surface; 1165 - curved section; 1166 - first contact point; 1167 - second contact point; 1168 - third contact point; 117 - cross beam; 1171 - groove; 1172 - third cavity; 1173 - cross beam body; 1174 - first protruding portion; 1175 - second protruding portion; 1176 - abutting plate; 1177 - first abutting plate; 1178 - second abutting plate; 118 - fixing structure; 1181 - adapter pipe; 1182 - input pipe; 1183 - output pipe; 1184 - fixing portion; 12 - bottom plate assembly; 121 - bottom guard plate; 1211 - reinforcing structure; 1212 - protruding portion; 1213 - buffer protrusion; 1214 - buffer space; 1215 - third opening; 1216 - fixing protrusion; 1217 - avoiding cavity; 1218 - fourth opening; 1219 - connecting hole; 1220 - first sub-connecting hole; 1221 - second sub-connecting hole; 1222 - mounting slot; 1223 - protection portion; 1224 - recessed portion; 123 - temperature adjusting plate; 1231 - connecting portion; 1232 - sealing member; 1233 - sealing section; 1234 - meandering section; 1235 - curved section; 1236 - connecting section; 13 - locking structure; 130 - third abutting portion; 131 - third locking member; 132 - connecting member; 14 - control assembly; 141 - bracket; 1411 - mounting plate; 1412 - first through hole; 1413 - second through hole; 1414 - third through hole; 1415 - flange segment; 1416 - edge segment; 1417 - second opening; 1418 - flange; 1419 - first flange; 1420 - second flange; 1421 - fixed flange; 1422 - first plate surface; 1423 - first recess; 1424 - second plate surface; 1425 - first protrusion; 1426 - second protrusion; 1427 - abutting surface; 142 - first controller; 143 - second controller; 151 - first locking member; 1511 - first abutting portion; 152 - second locking member; 1521 - second abutting portion; 16 - box cover; 17 - battery assembly; 171 - battery; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device.

[0021] The present application provides a control assembly, a bottom plate assembly, a battery box and a battery pack. The following are described in detail.

[0022] Figure 1 The structural schematic diagram of an embodiment of the battery pack provided by the present application is shown. Figure 2 The exploded structural schematic diagram of an embodiment of the battery pack provided by the present application is shown. Figure 1 And Figure 2As shown, the battery pack 1 comprises a battery box 10 and a battery assembly 17, the battery box 10 encloses a receiving cavity 110, and the battery assembly 17 comprises a plurality of batteries 171, the batteries 171 of the battery assembly 17 are installed in the receiving cavity 110 of the battery box 10. The receiving cavity 110 comprises a battery compartment 1101 and an electrical compartment 1102, the battery compartment 1101 is used to install the batteries 171 of the battery assembly 17, and the electrical compartment 1102 is used to install electrical devices. The battery pack 1 can further comprise a control assembly 14, and the control assembly 14 is installed in the electrical compartment 1102. The control assembly 14 can be used to control the charging, discharging or other functions of the battery pack 1.

[0023] With reference to Figure 2 , the battery box 10 comprises a frame 11, and the frame 11 encloses a receiving cavity 110. The battery box 10 further comprises a bottom plate assembly 12, and the bottom plate assembly 12 is arranged at one side of the frame 11. One side of the bottom plate assembly 12 is arranged opposite to the receiving cavity 110. The bottom plate assembly 12 can provide support for the batteries 171 or other components in the receiving cavity 110. Moreover, the bottom plate assembly 12 can cover the receiving cavity 110, so that the side of the receiving cavity 110 close to the bottom plate assembly 12 remains in a sealed state. In addition, when the bottom plate assembly 12 has a temperature regulating function, the bottom plate assembly 12 can also be used to regulate the temperature of the batteries 171, that is, to heat or cool the batteries 171.

[0024] With reference to Figure 2 , the battery box 10 further comprises a box cover 16, and the box cover 16 is arranged at the other side of the frame 11. One side of the box cover 16 is arranged opposite to the receiving cavity 110. The box cover 16 can cover the receiving cavity 110, so that the side of the receiving cavity 110 close to the box cover 16 remains in a sealed state. When the battery pack 1 is in normal use, the bottom plate assembly 12 of the battery box 10 is located at the bottom of the battery box 10. The box cover 16 of the battery box 10 is located at the top of the battery box 10.

[0025] As shown in Figure 3 , the frame 11 comprises two edge beams 111 and at least one longitudinal beam 112, the two edge beams 111 of the frame 11 are distributed on both sides of the receiving cavity 110 along a first direction X, and the edge beams 111 extend along a second direction Y, and the second direction Y forms an angle with the first direction X. The at least one longitudinal beam 112 is located in the receiving cavity 110, and the longitudinal beam 112 extends along the second direction Y. It should be noted that the angle formed by the first direction X and the second direction Y can be a right angle or an acute angle, which is not limited here.

[0026] The yield strength of the at least one side beam 111 can be less than the yield strength of the longitudinal beam 112. In this way, the at least one side beam 111 can have a relatively low yield strength to improve the cushioning effect of the side beam 111 after being squeezed or impacted, and to reduce the risk of the battery 171 in the accommodation cavity 110 being vibrated and displaced by the side beam 111. At the same time, the longitudinal beam 112 can have a relatively high yield strength to limit the battery 171 in the accommodation cavity 110, and to reduce the risk of the battery 171 in the accommodation cavity 110 being vibrated and displaced.

[0027] As shown in Figure 4 The at least one side beam 111 can include a side beam body 1111 and a first support plate 1118. The side beam body 1111 includes two first side walls 1115 arranged in a spaced apart manner along the first direction X, and the first support plate 1118 is connected between the two first side walls 1115. In this way, the two first side walls 1115 can be supported by the first support plate 1118 to improve the yield strength of the side beam 111 in the first direction X, and to improve the anti-squeezing effect of the side beam 111 in the first direction X.

[0028] The at least one side beam 111 can be formed by rolling and welding steel to improve the material utilization of the side beam 111 and reduce the cost of the side beam 111.

[0029] In some embodiments, the side beam body 1111 includes a first cavity 1112 between the two first side walls 1115. The side beam body 1111 includes two first connecting walls 1117 distributed on both sides of the first cavity 1112 along the third direction Z, and each first connecting wall 1117 is connected between the two first side walls 1115. The two first connecting walls 1117 are integrally formed with the two first side walls 1115. The first side wall 1115 is a strip-shaped plate structure extending along the second direction Y. The side surface of the first side wall 1115 is arranged at an angle with the first direction X. The first connecting wall 1117 is a strip-shaped plate structure extending along the second direction Y. The side surface of the second connecting wall 1126 is arranged at an angle with the third direction Z. The first support plate 1118 is located between the two first connecting walls 1117. The side surface of the first support plate 1118 is arranged at an angle with the third direction Z. The first support plate 1118 is spaced apart from the two first connecting walls 1117. The first support plate 1118 is a strip-shaped plate extending along the second direction Y. The first direction X, the second direction Y, and the third direction Z are arranged at an angle with each other. The angle between the first direction X, the second direction Y, and the third direction Z can be a right angle or an acute angle, which is not limited here.

[0030] In some embodiments, one of the two first side walls 1115 includes two first sub-side walls 1116 distributed along the third direction Z, and the mutually distal end edges of the two first sub-side walls 1116 are connected to the two first connecting walls 1117 one by one. The mutually proximal end edges of the two first sub-side walls 1116 overlap in the first direction X, so as to facilitate the stable connection of the mutually proximal end edges of the two first sub-side walls 1116. Among them, the mutually proximal end edges of the two first sub-side walls 1116 overlap and are welded in the first direction X, so as to improve the connection stability of the two first sub-side walls 1116.

[0031] In some embodiments, one of the two first sub-side walls 1116 is located on the side of the other first sub-side wall 1116 facing the first cavity 1112, and is connected to the side edge of the first support plate 1118 along the first direction X. The other side edge of the first support plate 1118 along the first direction X is provided with a first connecting flange 1119, and the side surface of the first connecting flange 1119 is stacked with the other first side wall 1115 of the two first side walls 1115 and is welded together.

[0032] Continuing to refer to Figure 4 The edge beam body 1111 includes a first cavity 1112 located between the two first side walls 1115, and the first support plate 1118 divides the first cavity 1112 into a first sub-cavity 1113 and a second sub-cavity 1114 distributed along the third direction Z, and the second sub-cavity 1114 is closer to the bottom of the battery box 10 than the first sub-cavity 1113. The first direction X, the second direction Y and the third direction Z form an angle with each other. The height of the first sub-cavity 1113 in the third direction Z is h1, and the height of the second sub-cavity 1114 in the third direction Z is h2. In some embodiments, the height h1 of the first sub-cavity 1113 in the third direction Z and the height h2 of the second sub-cavity 1114 in the third direction Z can satisfy: h1≤h2. In this way, the first side wall 1115 corresponding to the edge beam 111 and the second sub-cavity 1114 can be connected with the mounting beam assembly 115, which is conducive to improving the connection strength and connection stability of the edge beam 111 and the mounting beam assembly 115.

[0033] In some embodiments, the height h1 of the first sub-cavity 1113 in the third direction Z and the height h2 of the second sub-cavity 1114 in the third direction Z can satisfy: 0.3≤h1 / h2≤1. In this way, the connection strength and connection stability of the edge beam 111 and the mounting beam assembly 115 can be improved, and at the same time, the yield strength of the second support plate 1132 to the edge beam 111 can be improved.

[0034] The ratio of the height h1 of the first sub-cavity 1113 in the third direction Z to the height h2 of the second sub-cavity 1114 in the third direction Z can be 0.34, 0.4, 0.45, 0.51, 0.58, 0.6, 0.7, 0.8, 0.9, etc., which is not limited here.

[0035] In some preferred embodiments, the height h1 of the first sub-cavity 1113 in the third direction Z can be 2.76 cm. The height h2 of the second sub-cavity 1114 in the third direction Z is 5.38 cm.

[0036] In some embodiments, as shown in Figure 5 The at least one longitudinal beam 112 can include a longitudinal beam body 1123 including two second side walls 1124 arranged opposite to each other in the first direction X, and a second support plate 1132 connected between the two second side walls 1124. In this way, the two second side walls 1124 can be supported by the second support plate 1132 to improve the yield strength of the longitudinal beam 112 in the first direction X, so that the longitudinal beam 112 has better anti-extrusion effect in the first direction X.

[0037] The number of the second support plates 1132 of the at least one longitudinal beam 112 can be greater than the number of the first support plates 1118 of the at least one edge beam 111. In this way, the yield strength of the at least one longitudinal beam 112 can be greater than the yield strength of the at least one edge beam 111.

[0038] It can be understood that the more the number of the second support plates 1132 in the longitudinal beam 112, the better the support effect of the second support plates 1132 on the two second side walls 1124 of the longitudinal beam 112, which is conducive to improving the yield strength of the longitudinal beam 112 and making the longitudinal beam 112 have better anti-extrusion effect in the first direction X. Therefore, when the number of the second support plates 1132 in the longitudinal beam 112 is greater than the number of the first support plates 1118 of the edge beam 111, it is conducive to making the yield strength of the longitudinal beam 112 greater than the yield strength of the edge beam 111.

[0039] The at least one longitudinal beam 112 can be formed by roll-welding of steel to improve the material utilization rate of the longitudinal beam 112 and reduce the cost of the longitudinal beam 112.

[0040] In some embodiments, the stringer body 1123 includes a second cavity 1128 between the two second side walls 1124. The stringer body 1123 includes two second connecting walls 1126 distributed on both sides of the second cavity 1128 along the third direction Z, each second connecting wall 1126 being connected between the two second side walls 1124. The two second connecting walls 1126 are integrally formed with the two second side walls 1124. The second side wall 1124 is a strip-shaped plate structure extending along the second direction Y. The side surface of the second side wall 1124 is arranged at an angle to the second direction Y. The second connecting wall 1126 is a strip-shaped plate structure extending along the second direction Y. The side surface of the second connecting wall 1126 is arranged at an angle to the third direction Z. A plurality of second support plates 1132 are located between the two second connecting walls 1126. The plurality of second support plates 1132 are spaced apart along the third direction Z. The second support plate 1132 is spaced apart from the two second connecting walls 1126. The side surface of the second support plate 1132 is arranged at an angle to the third direction Z. The second support plate 1132 is a strip-shaped plate extending along the second direction Y.

[0041] In some embodiments, one of the two second side walls 1124 includes two second sub-side walls 1125 distributed along the third direction Z, the two second sub-side walls 1125 being connected at one end away from each other to one of the two second connecting walls 1126. One of the second sub-side walls 1125 is connected at one end away from the corresponding second connecting wall 1126 to a second connecting flange 1127 extending towards the second cavity 1128, and the other second sub-side wall 1125 is connected at one end away from the corresponding second connecting wall 1126 to one of the second support plates 1132 along one side edge of the first direction X. One of the second support plates 1132 overlaps the second connecting flange 1127 in the third direction Z and is welded to each other.

[0042] One of the second support plates 1132 is connected at an edge away from the second sub-side wall 1125 to an overlapping wall 1133 overlapping the other of the two second side walls 1124 and being welded to each other. The overlapping wall 1133 is connected at an edge away from one side of the one of the second support plates 1132 to the other of the second support plates 1132 along the third direction Z. The other of the second support plates 1132 is connected at an edge away from the overlapping wall 1133 to a third connecting flange 1134 overlapping the second sub-side wall 1125 connected to the second connecting flange 1127 and being welded to each other.

[0043] With continued reference to Figure 5The longitudinal beam 112 includes a second cavity 1128 between the two second side walls 1124, at least one longitudinal beam 112 includes two second support plates 1132 that are relatively spaced apart along the third direction Z, and the two second support plates 1132 separate the second cavity 1128 into a third sub-cavity 1129, a fourth sub-cavity 1130, and a fifth sub-cavity 1131 that are sequentially close to the bottom of the battery box 10 along the third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually at an angle.

[0044] The height of the third sub-cavity 1129 in the third direction Z is h3, the height of the fourth sub-cavity 1130 in the third direction Z is h4, and the height of the fifth sub-cavity 1131 in the third direction Z is h5. In some embodiments, the height h3 of the third sub-cavity 1129 in the third direction Z, the height h4 of the fourth sub-cavity 1130 in the third direction Z, and the height h5 of the fifth sub-cavity 1131 in the third direction Z can satisfy: h5≤h4≤h3. Thus, it is beneficial to improve the yield strength of the area of the longitudinal beam 112 close to the bottom of the battery box 10, thereby improving the overall yield strength of the frame body 11.

[0045] In some embodiments, the height h3 of the third sub-cavity 1129 in the third direction Z and the height h4 of the fourth sub-cavity 1130 in the third direction Z can satisfy: 0.8≤h4 / h3≤1. Thus, the second support plate 1132 between the third sub-cavity 1129 and the fourth sub-cavity 1130 can be prevented from being too close to the bottom of the battery box 10, thereby affecting the reinforcing effect of the second support plate 1132 between the third sub-cavity 1129 and the fourth sub-cavity 1130 on the longitudinal beam 112, and causing the problem of insufficient yield strength of the area of the longitudinal beam 112 away from the bottom of the box.

[0046] The ratio of the height h3 of the third sub-cavity 1129 in the third direction Z to the height h4 of the fourth sub-cavity 1130 in the third direction Z can be 0.82, 0.85, 0.88, 0.9, 0.93, 0.97, etc., which is not limited here.

[0047] In some embodiments, the height h3 of the third sub-cavity 1129 in the third direction Z and the height h5 of the fifth sub-cavity 1131 in the third direction Z can satisfy: 0.7≤h5 / h3≤1. Thus, the second support plate 1132 between the fourth sub-cavity 1130 and the fifth sub-cavity 1131 can be prevented from being too close to the bottom of the battery box 10, thereby affecting the reinforcing effect of the second support plate 1132 between the fourth sub-cavity 1130 and the fifth sub-cavity 1131 on the longitudinal beam 112, and causing the problem of insufficient yield strength of the area of the longitudinal beam 112 away from the bottom of the box.

[0048] The ratio of the height h3 of the third sub-cavity 1129 in the third direction Z to the height h5 of the fifth sub-cavity 1131 in the third direction Z can be 0.72, 0.76, 0.8, 0.82, 0.85, 0.88, 0.9, 0.93, 0.97, etc., which is not limited here.

[0049] In some preferred embodiments, the height h3 of the third sub-cavity 1129 in the third direction Z can be 3.16 cm. The height h4 of the fourth sub-cavity 1130 in the third direction Z is 2.48 cm. The height h5 of the fifth sub-cavity 1131 in the third direction Z is 2.38 cm.

[0050] In some embodiments, the first cavity 1112 is formed in the side beam 111, and the wall thickness of the side beam 111 can be greater than or equal to 1 mm and less than or equal to 1.4 mm, so that the side beam 111 has a higher yield strength, and the yield strength of the side beam 111 is less than the yield strength of the longitudinal beam 112. The wall thickness of the side beam 111 can be 1.1 mm, 1.15 mm, 1.2 mm, 1.3 mm, etc., which is not limited here.

[0051] In other embodiments, the yield strength of the side wall of the side beam 111 can be greater than or equal to 360 MPa and less than or equal to 1000 MPa, so that the side beam 111 has a higher yield strength, and the yield strength of the side beam 111 is less than the yield strength of the longitudinal beam 112. The yield strength of the side wall of the side beam 111 can be 400 MPa, 450 MPa, 480 MPa, 500 MPa, 600 MPa, 800 MPa, 900 MPa, etc., which is not limited here.

[0052] In some embodiments, the width W1 of the side beam 111 in the first direction X is greater than or equal to 2 cm and less than or equal to 3.5 cm, so that the side beam 111 has a higher yield strength and better buffering effect. The width W1 of the side beam 111 in the first direction X can be 2.2 cm, 2.7 cm, 3 cm, 3.2 cm, 3.4 cm, etc., which is not limited here.

[0053] In some embodiments, the length of the side beam 111 in the second direction Y can be greater than or equal to 1.2 m and less than or equal to 1.6 m, so that the side beam 111 has a higher yield strength and better buffering effect. The length of the side beam 111 in the second direction Y can be 1.25 m, 1.3 m, 1.37 m, 1.4 m, 1.5 m, etc., which is not limited here.

[0054] In some embodiments, the height H1 of the side beam 111 in the third direction Z can be greater than or equal to 7.5 centimeters and less than or equal to 9.5 centimeters, so that the side beam 111 has a higher yield strength and better buffering effect. The first direction X, the second direction Y, and the third direction Z form an angle with each other. The height H1 of the side beam 111 in the third direction Z can be 7.7 centimeters, 7.9 centimeters, 8 centimeters, 8.5 centimeters, 9 centimeters, etc., which is not limited here.

[0055] In some embodiments, the second cavity 1128 is formed in the longitudinal beam 112, and the wall thickness of the longitudinal beam 112 is greater than or equal to 1 millimeter and less than or equal to 1.4 millimeters, so that the longitudinal beam 112 has a higher yield strength, and the yield strength of the longitudinal beam 112 is greater than the yield strength of the cross beam 117. The wall thickness of the longitudinal beam 112 can be 1.1 millimeters, 1.15 millimeters, 1.2 millimeters, 1.3 millimeters, etc., which is not limited here.

[0056] In other embodiments, the yield strength of the side wall of the longitudinal beam 112 can be greater than or equal to 360 Mpa and less than or equal to 1000 Mpa, so that the longitudinal beam 112 has a higher yield strength, and the yield strength of the longitudinal beam 112 is greater than the yield strength of the cross beam 117. The yield strength of the side wall of the longitudinal beam 112 can be 400 Mpa, 450 Mpa, 480 Mpa, 500 Mpa, 600 Mpa, 800 Mpa, 900 Mpa, etc., which is not limited here.

[0057] In some embodiments, the width W2 of the longitudinal beam 112 in the first direction X is greater than or equal to 2 centimeters and less than or equal to 3.5 centimeters, so that the longitudinal beam 112 has a higher yield strength and reduces the space occupied by the longitudinal beam 112 in the accommodating cavity 110. The width W2 of the longitudinal beam 112 in the first direction X can be 2.2 centimeters, 2.7 centimeters, 3 centimeters, 3.2 centimeters, 3.4 centimeters, etc., which is not limited here.

[0058] In some embodiments, the length of the longitudinal beam 112 in the second direction Y can be greater than or equal to 1 meter and less than or equal to 1.3 meters, so that the longitudinal beam 112 has a higher yield strength. The length of the longitudinal beam 112 in the second direction Y can be 1.03 meters, 1.08 meters, 1.1 meters, 1.15 meters, 1.2 meters, 1.27 meters, etc., which is not limited here.

[0059] In some embodiments, the height H2 of the longitudinal beam 112 in the third direction Z can be greater than or equal to 7.5 cm and less than or equal to 9.5 cm, so that the longitudinal beam 112 has a higher yield strength and reduces the space occupied by the longitudinal beam 112 in the accommodating cavity 110. The first direction X, the second direction Y and the third direction Z form an angle with each other. The height H2 of the longitudinal beam 112 in the third direction Z can be 7.7 cm, 7.9 cm, 8 cm, 8.5 cm, 9 cm, etc., which is not limited here.

[0060] In some embodiments, as shown in FIG. 11, a notch 1122 can be formed at at least one end of the longitudinal beam 112, so that the end face of the longitudinal beam 112 extends to the side of the longitudinal beam 112 away from the bottom of the battery box 10 to form a avoiding part 1121. In this way, an avoiding space 1122 can be formed at at least one end of the longitudinal beam 112 away from the bottom of the battery box 10 to avoid the connection part 1231 such as the copper bar in the battery box 10. Figure 6

[0061] It should be noted that the notch 1121 can be formed at both ends of the longitudinal beam 112, or the notch 1121 can be formed at one end of the longitudinal beam 112.

[0062] In some embodiments, the notch 1122 can be an inclined notch or a right-angled notch, so that the notch 1122 is more convenient to process, and the notch can effectively avoid the connection part such as the copper bar.

[0063] In some embodiments, the longitudinal beam 112 includes a longitudinal beam body 1123 and a second support plate 1132, the longitudinal beam body 1123 includes two second side walls 1124 arranged at a relative interval along the first direction X, the second support plate 1132 is connected between the two second side walls 1124, the height H5 of the notch 1122 in the third direction Z is less than the distance between the side surface of the longitudinal beam 112 away from the bottom of the battery box 10 and the side surface of the second support plate 1132 away from the bottom of the battery box 10, the first direction X, the second direction Y and the third direction Z form an angle with each other, and the two second side walls 1124 and the second support plate 1132 together form the avoiding part 1121. In this way, the notch 1122 and the space of the longitudinal beam 112 on the side of the second support plate 1132 towards the bottom of the battery box 10 can be separated by the second support plate 1132, so as to avoid the problem that the metal debris in the space of the longitudinal beam 112 on the side of the second support plate 1132 towards the bottom of the battery box 10 falls into the battery and causes the battery to short circuit.

[0064] In some embodiments, a plugging part can be arranged between the cavity of the longitudinal beam 112 and the notch 1122 to close the cavity of the longitudinal beam 112. In this way, the risk that the metal debris in the cavity of the longitudinal beam 112 falls into the battery through the notch 1122 and causes the battery to short circuit can be avoided. ​

[0065] Specifically, the frame body 11 comprises a plurality of longitudinal beams 112 arranged at intervals along the first direction X. The plurality of longitudinal beams 112 divide the accommodation cavity 110 into a plurality of subspaces arranged along the first direction X. The plurality of batteries 171 of the battery assembly 17 are distributed in the plurality of subspaces. One end of the plurality of longitudinal beams 112 is respectively connected with the rear beam 114 on one side of the frame body 11 along the second direction Y, and the other end of the plurality of longitudinal beams 112 is respectively connected with the cross beam 117.

[0066] In some embodiments, as shown in Figure 5 , Figure 6 and Figure 10 , the longitudinal beam 112 is formed with a second cavity 1128, and at least one end of the longitudinal beam 112 is formed with a first opening 1135 communicating with the second cavity 1128, and a part of the first opening 1135 is formed in the avoiding portion 1121. Wherein, the battery box 10 can further comprise a blocking piece (not shown in the figure) connected with the longitudinal beam 112 and arranged at the first opening 1135.

[0067] It can be understood that, due to the formation of the avoiding portion 1121 at the end of the longitudinal beam 112, the size of the first opening 1135 is relatively large, and a part of the first opening 1135 is directed to the side of the longitudinal beam 112 away from the bottom of the battery box 10. Thus, it is easy for parts or other objects to fall into the second cavity 1128 through the first opening 1135, or for metal debris in the second cavity 1128 to fall into the battery through the first opening 1135. Therefore, by blocking the first opening 1135 with the blocking piece, the above-mentioned situations can be effectively avoided.

[0068] Wherein, the second cavity 1128 of the longitudinal beam 112 penetrates through the longitudinal beam 112 along the second direction Y. The blocking piece can be formed after the glue solidifies, or can be a component made of silicone, rubber or the like.

[0069] As shown in Figure 3 , Figure 7 and Figure 8 , the battery box 10 further comprises a mounting beam assembly 115 connected to one side of the frame body 11 along the first direction X. The mounting beam assembly 115 is used to connect with an external structure, so as to mount the battery box 10 on the external structure. Wherein, the number of the mounting beam assembly 115 is two. The two mounting beam assemblies 115 are connected to both sides of the frame body 11 along the first direction X. The mounting beam assembly 115 extends along the second direction Y to increase the connection length of the mounting beam assembly 115 with the frame body 11.

[0070] In some embodiments, the battery box 10 further comprises a mounting beam assembly 115 connected to the side beam 111 on the side away from the accommodating cavity 110, and the center of gravity of the mounting beam assembly 115 is closer to the bottom of the battery box 10 than the center of gravity of the side beam 111. In this way, the height of the center of gravity of the mounting beam assembly 115 can be reduced, and the support stability of the mounting beam assembly 115 to the frame 11 of the battery box 10 can be improved.

[0071] In some embodiments, the height difference between the center of gravity of the mounting beam assembly 115 and the center of gravity of the side beam 111 can be greater than or equal to 1 cm and less than or equal to 4 cm, so that the center of the mounting beam assembly 115 is as low as possible, and the connection of the mounting beam assembly 115 to the frame 11 of the battery box 10 is relatively convenient.

[0072] The height difference between the center of gravity of the mounting beam assembly 115 and the center of gravity of the side beam 111 can be 1.3 cm, 1.5 cm, 1.9 cm, 2 cm, 2.4 cm, 2.6 cm, 3 cm, 3.5 cm, etc., which is not limited here.

[0073] In some embodiments, the mounting beam assembly 115 can comprise a first mounting plate 1152 and a second mounting plate 1153 stacked along a third direction Z, and the first direction X, the second direction Y and the third direction Z are at an angle with each other.

[0074] In some embodiments, the side beam 111 connected to the mounting beam assembly 115 comprises a side beam body 1111 and a first support plate 1118, the side beam body 1111 comprises two first side walls 1115 arranged at a relative interval along the first direction X, and the first support plate 1118 is connected between the two first side walls 1115.

[0075] The intersection point of the first mounting plate 1152 and the second mounting plate 1153 is closer to the bottom of the battery box 10 than the first support plate 1118, and the height difference H3 between the intersection point of the first mounting plate 1152 and the second mounting plate 1153 and the first support plate 1118 is greater than or equal to 1 cm and less than or equal to 4 cm. In this way, the height of the center of gravity of the mounting beam assembly 115 can be reduced, and the support stability of the mounting beam assembly 115 to the frame 11 of the battery box 10 can be improved while the connection of the mounting beam assembly 115 to the frame 11 of the battery box 10 is relatively convenient.

[0076] In some embodiments, the height difference H3 between the intersection point of the first mounting plate 1152 and the second mounting plate 1153 and the first support plate 1118 can be 1.3 cm, 1.5 cm, 1.9 cm, 2 cm, 2.4 cm, 2.6 cm, 3 cm, 3.5 cm, etc., which is not limited here.

[0077] In other embodiments, the mounting beam assembly 115 includes a mounting portion 1151 for connection to an external structure. The mounting portion 1151's mid-plane P1 in the third direction Z is positioned closer to the bottom of the battery box 10 than the mid-plane P2 of the side beam 111 in the third direction Z, with the first direction X, the second direction Y, and the third direction Z forming an angle with each other. This lowers the center of gravity of the mounting beam assembly 115 and improves its support stability for the battery box 10's frame 11.

[0078] It should be noted that the mid-plane P1 of the mounting part 1151 in the third direction Z refers to the mid-plane between the farthest point and the nearest point of the mounting part 1151 from the bottom of the battery box 10 in the third direction Z, and the distance between the farthest point of the mounting part 1151 from the bottom of the battery box 10 in the third direction Z and the mid-plane P1 of the mounting part 1151 in the third direction Z is equal.

[0079] Similarly, the mid-plane P2 of the side beam 111 in the third direction Z refers to the mid-plane between the point farthest from the bottom of the battery box 10 and the point closest to the side beam 111 in the third direction Z, and the distance between the point farthest from the bottom of the battery box 10 and the mid-plane P2 of the side beam 111 in the third direction Z is equal.

[0080] In some embodiments, the height difference between the mid-plane P1 of the mounting part 1151 in the third direction Z and the mid-plane P2 of the side beam 111 in the third direction Z can be greater than or equal to 1 cm and less than or equal to 4 cm, so that the center of the mounting beam assembly 115 is as low as possible while making the connection between the mounting beam assembly 115 and the frame 11 of the battery box 10 more convenient.

[0081] The height difference between the mid-plane P1 of the mounting part 1151 in the third direction Z and the mid-plane P2 of the side beam 111 in the third direction Z can be 1.3 cm, 1.5 cm, 1.9 cm, 2 cm, 2.4 cm, 2.6 cm, 3 cm, 3.5 cm, etc., and there is no restriction here.

[0082] like Figure 8 As shown, the side beam 111 connected to the mounting beam assembly 115 includes a side beam body 1111 and a first support plate 1118. The side beam body 1111 includes two first side walls 1115 that are spaced apart from each other along the first direction X. The first support plate 1118 is connected between the two first side walls 1115.

[0083] In some embodiments, the mounting beam assembly 115 can include a first connecting portion 1160 and a second connecting portion 1161, the first connecting portion 1160 and the second connecting portion 1161 are respectively connected with the side wall of the side beam 111 away from the side of the accommodating cavity 110, and the first connecting portion 1160 is farther away from the bottom of the battery box 10 than the second connecting portion 1161, and the first connecting portion 1160 and the first support plate 1118 have overlapping orthographic projections on the projection plane perpendicular to the first direction X. Thus, the center of gravity of the mounting beam assembly 115 can be closer to the bottom of the battery box 10 than the center of gravity of the side beam 111.

[0084] In some embodiments, the first connecting portion 1160 can have a median plane P3 in the third direction Z, and the height difference between the median plane P3 of the first connecting portion 1160 and the median plane P4 of the first support plate 1118 in the third direction Z is less than or equal to 1 cm. Thus, the center of gravity of the mounting beam assembly 115 can be closer to the bottom of the battery box 10 than the center of gravity of the side beam 111, and the center of the side beam 111 is also as close to the bottom of the battery box 10 as possible.

[0085] The height difference between the median plane P3 of the first connecting portion 1160 in the third direction Z and the median plane P4 of the first support plate 1118 in the third direction Z can be 0 cm, 0.2 cm, 0.5 cm, 0.7 cm, 0.9 cm, etc., which is not limited here.

[0086] It should be noted that the median plane P3 of the first connecting portion 1160 in the third direction Z refers to the intermediate surface of the point farthest from the bottom of the battery box 10 and the nearest point of the first connecting portion 1160 in the third direction Z, and the distance between the point farthest from the bottom of the battery box 10 and the nearest point of the first connecting portion 1160 in the third direction Z is equal to the distance between the median plane P3 of the first connecting portion 1160 in the third direction Z.

[0087] The median plane P4 of the first support plate 1118 in the third direction Z refers to the intermediate surface of the point farthest from the bottom of the battery box 10 and the nearest point of the first support plate 1118 in the third direction Z, and the distance between the point farthest from the bottom of the battery box 10 and the nearest point of the first support plate 1118 in the third direction Z is equal to the distance between the median plane P4 of the first support plate 1118 in the third direction Z.

[0088] Specifically, the first connecting portion 1160 and the second connecting portion 1161 are provided in a plate shape. The side surface of the first connecting portion 1160 and the second connecting portion 1161 is arranged opposite to the side surface of the side beam 111 away from the accommodating cavity 110. The first connecting portion 1160 and the second connecting portion 1161 are respectively connected with the side beam 111 by welding.

[0089] In some embodiments, as Figure 9As shown, the first mounting plate 1152 can be flush with the first support plate 1118 in the third direction Z away from the bottom side surface of the battery box 10, the first direction X, the second direction Y and the third direction Z form an angle with each other, so that the center of gravity of the mounting beam assembly 115 is closer to the bottom of the battery box 10 compared with the center of gravity of the side beam 111, and the height difference between the center of gravity of the mounting beam assembly 115 and the center of gravity of the side beam 11 is not too large.

[0090] In some embodiments, the first connecting part 1160 can be connected with the first mounting plate 1152, and a reinforcing rib 1162 is arranged between the first connecting part 1160 and the first mounting plate 1152, so as to improve the connection strength between the first connecting part 1160 and the first mounting plate 1152, and further improve the strength of the mounting beam assembly 115.

[0091] In some embodiments, as shown, Figure 3 The frame 11 further includes a front beam 113 and a rear beam 114 distributed along the second direction Y, and the front beam 113 and the rear beam 114 respectively extend along the first direction X. The electrical compartment 1102 and the battery compartment 1101 are distributed along the second direction Y. The front beam 113 is located on the side of the electrical compartment 1102 away from the battery compartment 1101. The rear beam 114 is located on the side of the battery compartment 1101 away from the electrical compartment 1102.

[0092] Among them, the cavity formed in the front beam 113 and the rear beam 114 can have a rectangular shape in a cross section perpendicular to the first direction X. Alternatively, the front beam 113 and the rear beam 114 can have a cross section shape similar to that of the side beam 111 or the longitudinal beam 112 in a cross section perpendicular to the second direction Y.

[0093] In some embodiments, the wall thickness of the front beam 113 and / or the rear beam 114 can be greater than or equal to 1 millimeter and less than or equal to 1.4 millimeters, so as to ensure the yield strength of the front beam 113 and / or the rear beam 114 while reducing the processing difficulty of the front beam 113 and / or the rear beam 114.

[0094] The wall thickness of the front beam 113 and / or the rear beam 114 can be 1.1 millimeters, 1.15 millimeters, 1.2 millimeters, 1.26 millimeters, 1.3 millimeters, etc., which is not limited here. The material and processing method of the front beam 113 and / or the rear beam 114 can refer to the material and processing method of the longitudinal beam 112 and the side beam 111, which is not limited here.

[0095] In some embodiments, the length of the front beam 113 and / or the rear beam 114 in the first direction X may be greater than or equal to 0.8 meters and less than or equal to 1.5 meters to give the front beam 113 and / or the rear beam 114 a higher yield strength. The length of the front beam 113 and / or the rear beam 114 in the first direction X may be 0.85 meters, 0.9 meters, 0.97 meters, 1.06 meters, 1.3 meters, etc., and is not limited here.

[0096] In some embodiments, the width of the front beam 113 and / or the rear beam 114 in the second direction Y may be greater than or equal to 2 cm and less than or equal to 3.5 cm, so that the front beam 113 and / or the rear beam 114 have higher yield strength. The width of the front beam 113 and / or the rear beam 114 in the second direction Y may be 2.2 cm, 2.5 cm, 2.85 cm, 3 cm, 3.2 cm, etc., and is not limited here.

[0097] In some embodiments, the height of the front beam 113 and / or the rear beam 114 in the third direction Z can be greater than or equal to 7.5 cm and less than or equal to 9.5 cm to give the front beam 113 and / or the rear beam 114 a higher yield strength. The height of the front beam 113 and / or the rear beam 114 in the third direction Z can be 7.85 cm, 8.2 cm, 8.5 cm, 8.7 cm, etc., and is not limited here.

[0098] In some embodiments, such as Figure 7 and Figure 8 As shown, the battery box 10 includes a frame 11 and a mounting beam assembly 115, with the frame 11 enclosing a receiving cavity 110. The mounting beam assembly 115 is connected to one side of the frame 11 along a first direction X. The mounting beam assembly 115 includes a connecting structure 1154 connected to the frame 11. The connecting structure 1154 has a first abutment surface 1163 and a second abutment surface 1164, both of which abut against the frame 11 and are flush with each other. The connecting structure 1154 includes at least two interconnected curved sections 1165, and the bending directions between adjacent curved sections 1165 are different.

[0099] The battery box 10 provided by the embodiments of the present application can reduce stress concentration at the connection between the connection structure 1154 and the frame body 11, improve the connection strength and connection stability of the connection structure 1154 and the frame body 11 by making the first abutting surface 1163 and the second abutting surface 1163 of the connection structure 1154 of the mounting beam assembly 115 flush and abutting with the frame body 11, so that the connection structure 1154 and the frame body 11 enclose the cavity 1150. At the same time, the yield strength of the connection structure 1154 can be improved, and thus the connection strength of the connection structure 1154 and the frame body 11 can be improved by making the connection structure 1154 include at least two curved segments 1165 connected with each other, and the bending directions of the adjacent curved segments 1165 are different.

[0100] In some embodiments, the connection structure 1154 extends along the second direction Y to increase the length of the connection structure 1154, and thus the connection length of the connection structure 1154 and the frame body 11, so that the connection strength of the connection structure 1154 and the frame body 11 is higher. The connection structure 1154 and the frame body 11 enclose the cavity 1150 extending along the second direction Y, and the second direction Y is at an angle with the first direction X. Thus, the cavity 1150 can be formed between different parts of the connection structure 1154 along the second direction Y and the frame body 11, which is beneficial to further reduce the stress concentration at the connection between the connection structure 1154 and the frame body 11, and improve the connection strength of the connection structure 1154 and the frame body 11.

[0101] In some embodiments, the connection structure 1154 can include a first connecting plate 1155 and a second connecting plate 1159 arranged along a third direction Z, the first direction X, the second direction Y and the third direction Z are at an angle with each other, and the first connecting plate 1155 and the second connecting plate 1159 are connected with the frame body 11 and enclose the cavity 1150.

[0102] Among them, the first connecting plate 1155 can include at least two curved segments 1165 connected with each other, and the bending directions of the adjacent curved segments 1165 are different, so as to improve the yield strength of the first connecting plate 1155.

[0103] Of course, the second connecting plate 1159 can be at least partially curved towards the cavity 1150 or curved away from the cavity 1150 to improve the yield strength of the second connecting plate 1159.

[0104] It should be noted that the first connecting plate 1155 and the second connecting plate 1159 can be curved at the same time, or one of the first connecting plate 1155 and the second connecting plate 1159 can be curved. Of course, the former can further improve the yield strength of the mounting beam assembly 115.

[0105] In some embodiments, the first abutting surface 1163 is arranged on the first connecting plate 1155, and the second abutting surface 1164 is arranged on the second connecting plate 1159. In a cross section of the mounting beam assembly 115 perpendicular to the second direction Y, an end point of the first abutting surface 1163 closest to the cavity 1150 is a first contact point 1166, an end point of the second abutting surface 1164 closest to the cavity 1150 is a second contact point 1167, and an end point of the contact surface of the first connecting plate 1155 and the second connecting plate 1159 closest to the cavity 1150 is a third contact point 1168. An included angle θ formed by a line connecting the first contact point 1166 and the third contact point 1168 and a line connecting the second contact point 1167 and the third contact point 1168 is 30°-80°. In this way, the stress concentration phenomenon at the connecting position of the mounting beam assembly 115 and the frame body 11 can be further reduced, and the use stability and service life of the mounting beam assembly 115 during use can be improved.

[0106] The included angle θ formed by the line connecting the first contact point 1166 and the third contact point 1168 and the line connecting the second contact point 1167 and the third contact point 1168 can be 32°, 35°, 38°, 40°, 43°, 45°, 47°, 50°, 55°, 60°, 63°, 67°, 70°, 75°, etc., which is not limited here.

[0107] In some embodiments, the spacing between the first connecting plate 1155 and the second connecting plate 1159 can have an increasing trend along the direction close to the frame body 11. In this way, the first connecting plate 1155, the second connecting plate 1159, and the side beam 111 can form a nearly triangular structure, which is beneficial to improve the structural stability of the first connecting plate 1155, the second connecting plate 1159, and the side beam 111, and further improve the connection stability of the mounting beam assembly 115 and the side beam 111.

[0108] The spacing between the first connecting plate 1155 and the second connecting plate 1159 can gradually increase or increase in steps along the direction close to the frame body 11, or the spacing between a part of the first connecting plate 1155 and a part of the second connecting plate 1159 can gradually increase or increase in steps along the direction close to the frame body 11.

[0109] Specifically, the first connecting plate 1155 and the second connecting plate 1159 of the mounting beam assembly 115 are connected to one side of the mounting portion 1151 close to the frame body 11. The mounting portion 1151 includes the first mounting plate 1152 and the second mounting plate 1153 arranged in a stack along the third direction Z, and the side edge of the first mounting plate 1152 close to the frame body 11 is connected to the first connecting plate 1155, and the side edge of the second mounting plate 1153 close to the frame body 11 is connected to the second connecting plate 1159. The first mounting plate 1152 and the second mounting plate 1153 can be connected by welding.

[0110] The connecting structure 1154 includes a first connecting part 1160 and a second connecting part 1161. The first connecting plate 1155 is connected with the first connecting part 1160 near one side of the frame body 11, and the second connecting plate 1159 is connected with the second connecting part 1161 near one side of the frame body 11. The first mounting plate 1152, the first connecting plate 1155 and the first connecting part 1160 can be an integral structure. The second mounting plate 1153, the second connecting plate 1159 and the second connecting part 1161 can be an integral structure. The first mounting plate 1152, the first connecting plate 1155 and the first connecting part 1160 are respectively strip-shaped plates extending along the second direction Y. The second mounting plate 1153, the second connecting plate 1159 and the second connecting part 1161 are respectively strip-shaped plates extending along the second direction Y.

[0111] In some embodiments, the first connecting plate 1155 can be made to be farther away from the bottom of the battery box 10 than the second connecting plate 1159. The first connecting plate 1155 includes a first curved plate 1156 and a second curved plate 1157 connected in sequence in a direction close to the frame body 11, one of the first curved plate 1156 and the second curved plate 1157 is curved in a direction towards the cavity 1150, and the other of the first curved plate 1156 and the second curved plate 1157 is curved in a direction away from the cavity 1150. By making the curved directions of the first curved plate 1156 and the second curved plate 1157 of the first connecting plate 1155 opposite, the structural yield strength of the first connecting plate 1155 can be improved.

[0112] It should be noted that the first curved plate 1156 and the second curved plate 1157 can be arc-shaped plates or curved plates with different curvatures, which are not limited here.

[0113] In some embodiments, the first curved plate 1156 can be curved in a direction towards the cavity 1150, and the second curved plate 1157 can be curved in a direction away from the cavity 1150, so as to make the bending of the first connecting plate 1155 more convenient. Of course, the first curved plate 1156 can also be curved in a direction away from the cavity 1150, and the second curved plate 1157 can be curved in a direction towards the cavity 1150.

[0114] In some embodiments, the first connecting plate 1155 can further include a third curved plate 1158 connected to one end of the second curved plate 1157 away from the first curved plate 1156, one of the second curved plate 1157 and the third curved plate 1158 is curved in a direction towards the cavity 1150, and the other of the second curved plate 1157 and the third curved plate 1158 is curved in a direction away from the cavity 1150. In this way, the first connecting plate 1155 can have more bending structures, which is conducive to further improving the yield strength of the first connecting plate 1155.

[0115] Specifically, the first curved panel 1156 is curved in a direction towards the cavity 1150, the second curved panel 1157 is curved in a direction away from the cavity 1150, and the third curved panel 1158 is curved in a direction towards the cavity 1150. That is, the first curved panel 1156 and the third curved panel 1158 have the same bending direction, and the bending direction is opposite to that of the second curved panel 1157.

[0116] In some embodiments, the length L1 of the first curved panel 1156 extending in a direction away from the frame body 11 is greater than or equal to 0.5 cm and less than or equal to 0.85 cm, so that the first curved panel 1156 has a higher yield strength while bending is more convenient.

[0117] In some embodiments, the length L1 of the first curved panel 1156 extending in a direction away from the frame body 11 is greater than or equal to 0.5 cm and less than or equal to 0.85 cm, so that the first curved panel 1156 has a higher yield strength while bending is more convenient.

[0118] In some embodiments, the length L2 of the second curved panel 1157 extending in a direction away from the frame body 11 is greater than or equal to 0.6 cm and less than or equal to 1 cm, so that the second curved panel 1157 has a higher yield strength while bending is more convenient.

[0119] In some embodiments, the length L2 of the second curved panel 1157 extending in a direction away from the frame body 11 is greater than or equal to 0.6 cm and less than or equal to 1 cm, so that the second curved panel 1157 has a higher yield strength while bending is more convenient.

[0120] In some embodiments, the length L3 of the third curved panel 1158 extending in a direction away from the frame body 11 is greater than or equal to 0.5 cm and less than or equal to 0.8 cm, so that the third curved panel 1158 has a higher yield strength while bending is more convenient.

[0121] In some embodiments, the length L3 of the third curved panel 1158 extending in a direction away from the frame body 11 is greater than or equal to 0.5 cm and less than or equal to 0.8 cm, so that the third curved panel 1158 has a higher yield strength while bending is more convenient.

[0122] In some embodiments, the sum of the lengths of the first curved panel 1156, the second curved panel 1157, and the third curved panel 1158 extending in the direction away from the frame 11 can be greater than or equal to 2 cm and less than or equal to 3 cm, that is, 2 cm ≤ L1 + L2 + L3 ≤ 3 cm, so that the first curved panel 1156, the second curved panel 1157, and the third curved panel 1158 are easy to bend, while the yield strength of the first curved panel 1156, the second curved panel 1157, and the third curved panel 1158 to the first connecting plate 1155 is effectively improved.

[0123] The sum of the lengths of the first curved panel 1156, the second curved panel 1157, and the third curved panel 1158 extending away from the frame 11 can be 2.3 cm, 2.5 cm, 2.6 cm, 2.65 cm, 2.7 cm, 2.74 cm / 2.8 cm, etc., and there is no limitation here.

[0124] In some embodiments, the length L2 of the second curved panel 1157 extending in the direction away from the frame 11 can be greater than the length of the first curved panel 1156 and the third curved panel 1158 extending in the direction away from the frame 11, that is, L2≥L1+L3, so that the bending of the first curved panel 1156, the second curved panel 1157 and the third curved panel 1158 is more convenient.

[0125] In some embodiments, the cross-sectional area of ​​the cavity 1150 perpendicular to the second direction Y can be greater than or equal to 2 square centimeters and less than or equal to 5 square centimeters. This allows the cavity 1150 to effectively reduce stress concentration at the connection between the connecting structure 1154 and the frame 11, while preventing the cavity 1150 from being too large and affecting the connection strength between the connecting structure 1154 and the frame 11.

[0126] The cross-sectional area of ​​the cavity 1150 perpendicular to the second direction Y can be 2.3 square centimeters, 2.7 square centimeters, 3 square centimeters, 3.5 square centimeters, 4 square centimeters, 4.2 square centimeters, 4.7 square centimeters, etc., and there is no limitation here.

[0127] like Figure 3 As shown, the battery box 10 includes a frame 11, which encloses a receiving cavity 110. The frame 11 also includes a crossbeam 117 extending along a first direction X. The crossbeam 117 is located inside the receiving cavity 110 and divides the receiving cavity 110 into an electrical compartment 1102 and a battery compartment 1101 distributed along a second direction Y. The electrical compartment 1102 is used to accommodate electrical components, and the battery compartment 1101 is used to accommodate a battery 171. The first direction X and the second direction Y are arranged at an angle.

[0128] In some embodiments, the bottom surface of the cross beam 117 is provided with an abutting plate 1176, and the abutting plate 1176 is recessed to form a groove 1171 in a direction away from the bottom of the battery box 10, and the bottom wall of the groove 1171 overlaps and is fixedly welded with part of the inner wall surface of the cross beam 117.

[0129] The battery box 10 provided by the embodiments of the present application can improve the yield strength of the cross beam 117, and when the foaming glue or the glue is injected into the battery compartment 1101 and overflows to the side of the cross beam 117 facing the bottom of the battery box 10, the overflowing foaming glue or glue can be stored in the groove 1171, which is beneficial to reduce the risk of the overflowing foaming glue or glue flowing into the electrical compartment 1102 and affecting the electrical devices in the electrical compartment 1102.

[0130] In some embodiments, the battery box 10 further comprises a bottom plate assembly 12 which abuts against the abutting plate 1176.

[0131] In some embodiments, the abutting plate 1176 comprises a first abutting plate 1177 and a second abutting plate 1178, the first abutting plate 1177, the second abutting plate 1178 and the groove 1171 all extend along the first direction X, and the first abutting plate 1177 and the second abutting plate 1178 are spaced apart on both sides of the groove 1171 along the second direction Y. In this way, the abutting stability of the abutting plate 1176 and the bottom plate assembly 12 can be improved, and the shape of the groove 1171 is more stable.

[0132] As shown in Figure 12 The cross beam 117 can comprise a cross beam body 1173 and a first protruding portion 1174 protruding from the side of the cross beam body 1173 facing the electrical compartment 1102. The first protruding portion 1174 can improve the overall yield strength of the cross beam 117. In some embodiments, the groove 1171 is provided on the side of the first protruding portion 1174 facing the bottom of the battery box 10. When the foaming glue or the glue overflowing from the battery compartment 1101 flows to the lower side of the first protruding portion 1174, it can be stored in the groove 1171 below the first protruding portion 1174, thereby reducing the risk of the overflowing foaming glue or glue flowing into the electrical compartment 1102.

[0133] In some embodiments, the bottom wall of the groove 1171 overlaps and is fixedly welded with part of the top wall inner wall surface of the first protruding portion 1174, thereby improving the yield strength of the first protruding portion 1174.

[0134] In some embodiments, part of the side wall of the groove 1171 overlaps with the side wall of the beam body 1173 and is welded to be fixed, so as to improve the yield strength of the beam body 1173.

[0135] In some embodiments, the groove 1171 located at the first extension 1174 is arranged close to the beam body 1173, so that the foaming glue or glue remaining in the groove 1171 of the first extension 1174 is as far away from the electrical compartment 1102 as possible, so as to reduce the risk of the overflowing foaming glue or glue flowing into the electrical compartment 1102.

[0136] Continuing to refer to Figure 12 The beam 117 includes a beam body 1173, and a second extension 1175 protruding from the beam body 1173 towards the side of the battery compartment 1101. The second extension 1175 can improve the overall yield strength of the beam 117. In other embodiments, the groove 1171 can also be arranged on the side of the second extension 1175 facing the bottom of the battery box 10. When the foaming glue or glue overflowing from the battery compartment 1101 flows to the lower side of the second extension 1175, it can remain in the groove 1171 below the second extension 1175, so as to reduce the risk of the overflowing foaming glue or glue flowing into the electrical compartment 1102.

[0137] In other embodiments, the groove 1171 located at the second extension 1175 can be arranged away from the beam body 1173, so that the foaming glue or glue remaining in the groove 1171 of the second extension 1175 is as far away from the electrical compartment 1102 as possible, so as to reduce the risk of the overflowing foaming glue or glue flowing into the electrical compartment 1102.

[0138] In some embodiments, the bottom wall of the groove 1171 can overlap with the inner wall surface of the top wall of the second extension 1175 and be welded to be fixed, so as to improve the yield strength of the second extension 1175.

[0139] In some embodiments, part of the side wall of the groove 1171 overlaps with the side wall of the beam body 1173 and is welded to be fixed, so as to improve the yield strength of the beam body 1173.

[0140] In some embodiments, the height of the first extension 1174 relative to the bottom of the battery box 10 is less than the height of the beam body 1173 relative to the bottom of the battery box 10, so as to avoid that the first extension 1174 occupies too much space in the accommodating cavity 110.

[0141] The height difference between the beam body 1173 and the first protruding portion 1174 can be greater than or equal to 0.3 and less than or equal to 0.45, so that the first protruding portion 1174 effectively improves the yield strength of the beam 117 while avoiding occupying too much space in the accommodating cavity 110.

[0142] The height difference between the beam body 1173 and the first protruding portion 1174 can be 0.32, 0.35, 0.37, 0.39, 0.4, 0.43, etc., which is not limited here.

[0143] In some embodiments, the height difference between the beam body 1173 and the first protruding portion 1174 can be greater than or equal to 3 cm and less than or equal to 5 cm, so that the first protruding portion 1174 has sufficient height relative to the bottom of the battery box 10 to improve the yield strength of the entire beam 117 while minimizing the space occupied by the first protruding portion 1174 in the accommodating cavity 110.

[0144] The height difference between the beam body 1173 and the first protruding portion 1174 can be 3.2 cm, 3.4 cm, 3.5 cm, 3.8 cm, 4 cm, 4.3 cm, 4.7 cm, etc., which is not limited here.

[0145] In some embodiments, the height of the second protruding portion 1175 relative to the bottom of the battery box 10 can be less than the height of the beam body 1173 relative to the bottom of the battery box 10, so as to avoid the second protruding portion 1175 occupying too much space in the accommodating cavity 110.

[0146] In some embodiments, the height difference between the beam body 1173 and the second protruding portion 1175 can be greater than or equal to 3 cm and less than or equal to 5 cm, so that the second protruding portion 1175 has sufficient height relative to the bottom of the battery box 10 to improve the yield strength of the entire beam 117 while minimizing the space occupied by the first protruding portion 1174 in the accommodating cavity 110.

[0147] The height difference between the beam body 1173 and the second protruding portion 1175 can be 3.2 cm, 3.4 cm, 3.5 cm, 3.8 cm, 4 cm, 4.3 cm, 4.7 cm, etc., which is not limited here.

[0148] In some embodiments, the height difference of the beam body 1173 relative to the second extension 1175 is h6, and the height of the second extension 1175 relative to the bottom of the battery box 10 is h7, wherein the height difference h6 of the beam body 1173 relative to the second extension 1175 and the height h7 of the second extension 1175 relative to the bottom of the battery box 10 can satisfy: 0.3≤h7 / h6≤0.45, so as to effectively improve the yield strength of the second extension 1175 while avoiding occupying too much space in the accommodating cavity 110.

[0149] The ratio of the height difference h6 of the beam body 1173 relative to the second extension 1175 and the height h7 of the second extension 1175 relative to the bottom of the battery box 10 can be 0.32, 0.35, 0.37, 0.39, 0.4, 0.43, etc., which is not limited here.

[0150] In some embodiments, the height H4 of the beam body 1173 in the third direction Z can be greater than or equal to 5.5 cm and less than or equal to 7 cm, so as to have a higher yield strength in the third direction Z, and the first direction X, the second direction Y and the third direction Z form an angle with each other.

[0151] The height H4 of the beam body 1173 in the third direction Z can be 5.8 cm, 5.9 cm, 6 cm, 6.2 cm, 6.5 cm, 6.7 cm, 6.8 cm, etc., which is not limited here.

[0152] In some embodiments, the height h7 of the first extension 1174 in the third direction Z can be greater than or equal to 3 cm and less than or equal to 5 cm, so as to have a higher yield strength in the third direction Z, and the first direction X, the second direction Y and the third direction Z form an angle with each other.

[0153] The height h7 of the first extension 1174 in the third direction Z can be 3.2 cm, 3.5 cm, 3.8 cm, 4 cm, 4.2 cm, 4.6 cm, 4.9 cm, etc., which is not limited here.

[0154] In some embodiments, the height h8 of the second extension 1175 in the third direction Z can be greater than or equal to 3 cm and less than or equal to 5 cm, so as to have a higher yield strength in the third direction Z, and the first direction X, the second direction Y and the third direction Z form an angle with each other.

[0155] The height h8 of the second extension 1175 in the third direction Z can be 3.2 cm, 3.5 cm, 3.8 cm, 4 cm, 4.2 cm, 4.6 cm, 4.9 cm, etc., which is not limited here.

[0156] In some embodiments, the width W3 of the cross beam 117 in the second direction Y can be greater than or equal to 8 cm and less than or equal to 10 cm, so that the cross beam 117 as a whole has a higher yield strength in the second direction Y.

[0157] The width W3 of the cross beam 117 in the second direction Y can be 8.2 cm, 8.5 cm, 8.8 cm, 9 cm, 9.2 cm, 9.6 cm, 9.9 cm, etc., which is not limited here.

[0158] In some embodiments, the width W4 of the cross beam body 1173 in the second direction Y can be greater than or equal to 2 cm and less than or equal to 3.5 cm, so that the cross beam body 1173 has a higher yield strength in the second direction Y.

[0159] The width W4 of the cross beam body 1173 in the second direction Y can be 2.2 cm, 2.5 cm, 2.8 cm, 3 cm, 3.2 cm, etc., which is not limited here.

[0160] In some embodiments, the ratio of the width W4 of the cross beam body 1173 in the second direction Y to the width W4 of the cross beam 117 in the second direction Y can be greater than or equal to 1 / 4 and less than or equal to 1 / 3, so that the cross beam body 1173 guarantees the yield strength of the cross beam 117 in the second direction Y while reducing the space occupied by the cross beam body 1173 as much as possible.

[0161] The ratio of the width W4 of the cross beam body 1173 in the second direction Y to the width W3 of the cross beam 117 in the second direction Y can be 0.26, 0.28, 0.29, 0.3, 0.31, 0.33, etc., which is not limited here.

[0162] In some embodiments, the length of the cross beam 117 in the first direction X can be greater than or equal to 0.79 m and less than or equal to 1.49 m, so that the cross beam 117 has a higher yield strength. The length of the cross beam 117 in the first direction X can be 0.8 m, 0.82 m, 0.86 m, 0.9 m, 0.96 m, 0.98 m, 1 m, 1.2 m, etc., which is not limited here.

[0163] In some embodiments, the frame body 11 further comprises two side beams 111 distributed on both sides of the accommodating cavity 110 along the first direction X, the two side beams 111 extend along the second direction Y, and the two side beams 111 are connected with the two ends of the cross beam 117 one by one. Wherein, the yield strength of the cross beam 117 can be greater than the yield strength of at least one side beam 111, so that the side beam 111 has a better buffering effect, and at the same time, the side beam 111 is stably supported by the cross beam 117, thereby improving the yield strength and buffering performance of the frame body 11.

[0164] Wherein, the first cavity 1112 is formed in the side beam 111, and the third cavity 1172 is formed in the cross beam 117, and the wall thickness of the cross beam 117 can be greater than the wall thickness of the side beam 111, so that the yield strength of the cross beam 117 is greater than the yield strength of at least one side beam 111.

[0165] In some embodiments, the third cavity 1172 can be formed in the cross beam 117, and the wall thickness of the cross beam 117 is greater than or equal to 1.1 mm and less than or equal to 1.8 mm, so that the cross beam 117 has a higher yield strength, and in particular, the cross beam 117 has a higher yield strength than the side beam 111. Wherein, the wall thickness of the cross beam 117 can be 1.2 mm, 1.3 mm, 1.4 mm, 1.7 mm, etc., which is not limited here.

[0166] In some embodiments, the frame body 11 further comprises at least one longitudinal beam 112 located in the battery compartment 1101, the longitudinal beam 112 extends along the second direction Y, and one end of the longitudinal beam 112 is connected with the cross beam 117. Wherein, the yield strength of the cross beam 117 can be greater than the yield strength of the longitudinal beam 112, so that the cross beam 117 has a better supporting effect in the first direction X and a better extrusion resistance in the second direction Y.

[0167] Wherein, the second cavity 1128 is formed in the longitudinal beam 112, the third cavity 1172 is formed in the cross beam 117, and the wall thickness of the cross beam 117 is greater than the wall thickness of the longitudinal beam 112, so that the yield strength of the cross beam 117 is greater than the yield strength of the longitudinal beam 112.

[0168] In the embodiments of the present application, the cross beam 117 can be formed by welding a plurality of bent steel plates, so that the cross beam 117 has a higher yield strength and a lower cost. The plurality of bent steel plates are connected with each other by welding and surround to form the third cavity 1172. The third cavity 1172 is distributed in the cross beam body 1173, the first extension 1174 and the second extension 1175. The parts of the third cavity 1172 located in the cross beam body 1173 and the second extension 1175 are communicated with each other.

[0169] In some embodiments, a glue layer can be arranged between the battery assembly 17 and the bottom plate assembly 12, so as to seal the gap between the battery assembly 17 and the bottom plate assembly 12.

[0170] As shown in Figure 3 and Figure 13 , the control assembly 14 includes a bracket 141, a first controller 142 and a second controller 143, the bracket 141 includes a mounting plate 1411, and the first controller 142 and the second controller 143 are mounted on both sides of the mounting plate 1411. As shown in Figure 13 、 Figure 14 and Figure 15 , the mounting plate 1411 includes opposite first and second plate surfaces 1422 and 1424. The first and second plate surfaces 1422 and 1424 are distributed on both sides of the mounting plate 1411 along the thickness direction of the mounting plate 1411. When the bracket 141 is mounted on the frame body 11, the thickness direction of the mounting plate 1411 extends along the third direction Z.

[0171] The first controller 142 is mounted on the first plate surface 1422 of the mounting plate 1411, and the second controller 143 is mounted on the second plate surface 1424 of the mounting plate 1411, so that the first controller 142 and the second controller 143 are mounted on both sides of the mounting plate 1411. Among them, the first controller 142 and the second controller 143 can be arranged in a staggered manner along the thickness direction of the mounting plate 1411.

[0172] The control assembly 14 provided by the embodiment of the application can make the structure of the first controller 142, the second controller 143 and the bracket 141 more compact by mounting the first controller 142 on the first plate surface 1422 of the mounting plate 1411 and mounting the second controller 143 on the second plate surface 1424 of the mounting plate 1411, which is beneficial to reduce the installation space occupied by the control assembly 14 in the accommodating cavity 110. At the same time, by arranging the first controller 142 and the second controller 143 in a staggered manner along the thickness direction of the mounting plate 1411, the mounting plate 1411 can have sufficient space on both sides along the thickness direction to fix the first controller 142 and the second controller 143, so that the connection between the first controller 142 and the second controller 143 and the mounting plate 1411 is more convenient.

[0173] In some embodiments, the first controller 142 and the second controller 143 are arranged to be misaligned in the thickness direction of the mounting plate 1411, such that the first controller 142 and the second controller 143 are only partially overlapped in the orthographic projection of the first surface 1422. In this case, the area on the first surface 1422 of the mounting plate 1411 that is overlapped by the orthographic projection of the second controller 143 but not overlapped by the orthographic projection of the first controller 142 can be used to secure the second controller 143. Meanwhile, the area on the first surface 1422 of the mounting plate 1411 that is overlapped by the orthographic projection of the first controller 142 but not overlapped by the orthographic projection of the second controller 143 can be used to secure the first controller 142.

[0174] In some embodiments, a first through hole 1412 can be formed in the first surface 1422, and the control assembly 14 includes a first locking member 151 that passes through the first through hole 1412 and is connected to the second controller 143. Moreover, the first locking member 151 includes a first abutting portion 1511 that is used to abut against the mounting plate 1411 to limit the movement of the first locking member 151 in the direction from the first surface 1422 to the second surface 1424. In this way, when the first locking member 151 is connected to the second controller 143, the relative position between the mounting plate 1411 and the second controller 143 can be kept stable by abutting the first abutting portion 1511 of the first locking member 151 against the mounting plate 1411.

[0175] In some embodiments, the first surface 1422 can be recessed to form a first recessed groove 1423, the bottom surface of the first recessed groove 1423 is provided with the first through hole 1412, and at least part of the first abutting portion 1511 of the first locking member 151 is located in the first recessed groove 1423. In this way, the height of the first abutting portion 1511 of the first locking member 151 protruding from the first surface 1422 can be reduced, thereby reducing the risk of interference between the first abutting portion 1511 of the first locking member 151 and the first controller 142 mounted on the first surface 1422.

[0176] In some embodiments, the depth of the first recessed groove 1423 can be greater than or equal to the height of the first abutting portion 1511. In this way, the first abutting portion 1511 of the first locking member 151 can be entirely accommodated in the first recessed groove 1423, thereby further reducing the risk of interference between the first abutting portion 1511 of the first locking member 151 and the first controller 142.

[0177] As Figure 15As shown, a second through hole 1413 can be formed on the second plate surface 1424. The control assembly 14 includes a second locking member 152, which passes through the second through hole 1413 and is connected to the first controller 142. The second locking member 152 includes a second abutting portion 1521 protruding from the second plate surface 1424, which abuts against the mounting plate 1411 to restrict movement of the second locking member 152 along the direction from the second plate surface 1424 to the first plate surface 1422. Therefore, when the second locking member 152 is connected to the first controller 142, by abutting the second abutting portion 1521 of the second locking member 152 against the mounting plate 1411, movement of the first controller 142 away from the mounting plate 1411 can be restricted, thus maintaining a stable relative position between the mounting plate 1411 and the first controller 142.

[0178] In some embodiments, a first protrusion 1425 may be formed on the second plate surface 1424 at the position corresponding to the first recess 1423. The height of the first protrusion 1425 relative to the second plate surface 1424 is equal to the height of the second abutment portion 1521 relative to the second plate surface 1424. Thus, the first protrusion 1425 and the second abutment portion 1521 can support and position the second controller 143 mounted on the second plate surface 1424, ensuring stable mounting of the second controller 143 on the second plate surface 1424.

[0179] Furthermore, the projection of the second abutment portion 1521 of at least one second locking member 152 onto the second plate surface 1424 can be made so that it does not overlap with the projection of the second controller 143 onto the second plate surface 1424. Thus, the second abutment portion 1521 of the second locking member 152 will not interfere with the second controller 143, allowing the second controller 143 to be stably mounted on the second plate surface 1424.

[0180] In some embodiments, such as Figure 16 As shown, at least one second protrusion 1426 can be provided on the second surface 1424 of the mounting plate 1411. The second protrusion 1426 abuts against the side of the second controller 143 facing the mounting plate 1411. Thus, the second controller 143 can be supported and positioned by the second protrusion 1426, which helps to reduce the risk that the second controller 143 cannot be stably installed on the second surface 1424 due to insufficient flatness of the second surface 1424.

[0181] The second protrusion 1426 can be a strip-shaped protrusion to increase the contact area between the second protrusion 1426 and the second controller 143, which is beneficial to improving the installation stability of the second controller 143.

[0182] In some embodiments, a third through hole 1414 can be formed in the mounting plate 1411, which extends through the mounting plate 1411 along the thickness direction of the mounting plate 1411, so that the material of the mounting plate 1411 is reduced through the third through hole 1414, which is conducive to reducing the cost and weight of the mounting plate 1411.

[0183] In some embodiments, the second protrusion 1426 includes an abutting surface 1427 for abutting with the second controller 143. The third through hole 1414 can be formed in the abutting surface 1427, and the edge of the third through hole 1414 is spaced from the edge of the abutting surface 1427, so that the abutting surface 1427 has sufficient area to abut with the second controller 143, thereby improving the installation stability of the second controller 143. In some embodiments, the height of the first protrusion 1425 relative to the second plate surface 1424 can be equal to the height of the second protrusion 1426 relative to the second plate surface 1424. The first protrusion 1425 and the second protrusion 1426 can be used to support and position the second controller 143 mounted on the second plate surface 1424, so that the second controller 143 is stably mounted on the second plate surface 1424.

[0184] Specifically, a portion of the mounting plate 1411 is raised from the first mounting surface to the second mounting surface to form a first recess 1423 in the first mounting surface and a first protrusion 1425 in the second plate surface. The number of the first locking members 151 is plural. The number of the first recesses 1423 is equal to the number of the first locking members 151, and they are arranged one by one. The number of the second protrusions 1426 is plural. The plural second protrusions 1426 are arranged side by side. The third through hole 1414 is a strip-shaped hole extending along the length direction of the second protrusion 1426.

[0185] As shown in Figure 14 and Figure 15 The mounting plate 1411 includes opposite first and second edges. A first flange 1419 can be provided on the first edge of the mounting plate 1411, which protrudes from the first plate surface 1422. Thus, the first flange 1419 can abut with the first controller 142 to position the first controller 142 on the first plate surface 1422, so that the installation accuracy of the first controller 142 is higher.

[0186] In addition, a second flange 1420 can be provided on the second edge of the mounting plate 1411, which protrudes from the second plate surface 1424. Thus, the second flange 1420 can abut with the second controller 143 to position the second controller 143 on the second plate surface 1424, so that the installation accuracy of the second controller 143 is higher.

[0187] As shown in Figure 15As shown, the edge of the mounting plate 1411 includes at least one flanged segment 1415 extending circumferentially therefrom, and an edge segment 1416 adjacent to the flanged segment 1415. The flanged segment 1415 is connected to a flange 1418, which protrudes from a first plate surface 1422 or a second plate surface 1424. In some embodiments, a second opening 1417 may be provided between the at least one flanged segment 1415 and the adjacent edge segment 1416. This reduces stress concentration at the connection between the flange 1418 and the adjacent edge, which is beneficial for improving the yield strength of the flange 1418 and the mounting plate 1411.

[0188] The flange 1418 may include the first flange 1419 and the second flange 1420 described above. Furthermore, the flange 1418 may also include a fixed flange 1421 that bends from the edge of the mounting plate 1411 along the direction of the first plate surface 1422 toward the second plate surface 1424. This fixed flange 1421 is used for fixed connection with the frame 11. There may be multiple fixed flanges 1421. Multiple fixed flanges 1421 are spaced apart along the edge of the mounting plate 1411. Multiple fixed flanges 1421 are distributed around the perimeter of the mounting plate 1411.

[0189] In some embodiments, such as Figure 2 As shown, the battery box 10 includes a frame 11 and a bottom protective plate 121. The frame 11 encloses and forms a receiving cavity 110. The bottom protective plate 121 is disposed on one side of the frame 11, with one side surface of the bottom protective plate 121 facing the receiving cavity 110. In some embodiments, a reinforcing structure 1211 and a plurality of buffer protrusions 1213 may be provided on the side surface of the bottom protective plate 121 opposite to the receiving cavity 110. The plurality of buffer protrusions 1213 are distributed at least on opposite sides of the bottom protective plate 121. The height of the buffer protrusions 1213 relative to the side surface of the bottom protective plate 121 opposite to the receiving cavity 110 is greater than or equal to the height of the reinforcing structure 1211 relative to the side surface of the bottom protective plate 121 opposite to the receiving cavity 110.

[0190] The battery box 10 provided by the embodiments of the present application is provided with the reinforcing structure 1211 on the side surface of the bottom guard plate 121 away from the accommodating cavity 110, so that the yield strength of the bottom guard plate 121 can be improved by the reinforcing structure 1211, and the protection effect of the bottom guard plate 121 is improved. On this basis, the plurality of buffer protrusions 1213 are provided on the side surface of the bottom guard plate 121 away from the accommodating cavity 110, so that the plurality of buffer protrusions 1213 are distributed on the opposite two side edges of the bottom guard plate 121, and the height of the buffer protrusion 1213 relative to the side surface of the bottom guard plate 121 away from the accommodating cavity 110 is greater than or equal to the height of the reinforcing structure 1211 relative to the side surface of the bottom guard plate 121 away from the accommodating cavity 110. When the bottom guard plate 121 is impacted or extruded by an external structure, the external structure can more likely impact or extrude the buffer protrusion 1213 first, so as to reduce the risk of extrusion or impact of the reinforcing protrusion or other structures of the bottom guard plate 121.

[0191] In some embodiments, the plurality of buffer protrusions 1213 located on the same edge of the bottom guard plate 121 are arranged at intervals along the length direction of the corresponding edge, so as to further improve the buffer effect of the buffer protrusion 1213.

[0192] In some embodiments, the buffer space 1214 can be recessed at the position corresponding to the buffer protrusion 1213 on the side surface of the bottom guard plate 121 facing the accommodating cavity 110. Thus, when the buffer protrusion 1213 is extruded or impacted, the buffer protrusion 1213 can be deformed towards the buffer space 1214 to some extent, which is beneficial to improve the buffer effect of the buffer protrusion 1213.

[0193] In some embodiments, the third opening 1215 in communication with the buffer space 1214 can be formed on the edge of the bottom guard plate 121. Thus, the buffer protrusion 1213 can be as close to the edge of the bottom guard plate 121 as possible, which is beneficial to reduce the space of the bottom guard plate 121 occupied by the buffer protrusion 1213.

[0194] In some embodiments, a part of the bottom guard plate 121 is raised away from the accommodating cavity 110 to form the buffer protrusion 1213. Thus, the processing of the buffer protrusion 1213 and the buffer space 1214 can be more convenient, and the setting of the buffer protrusion 1213 can improve the yield strength of the bottom guard plate 121 at the edge to some extent.

[0195] Similarly, a part of the bottom guard plate 121 can be raised away from the accommodating cavity 110 to form the reinforcing structure 1211, so that the formation of the reinforcing structure 1211 is more convenient, and the reinforcing structure 1211 has a good reinforcing effect on the bottom guard plate 121. The reinforcing structure 1211 can be a strip-shaped structure extending along the first direction X or the second direction Y.

[0196] As Figure 17The bottom protection plate 121 further has a fixing protrusion 1216 on the side away from the accommodating cavity 110, which is used for the locking structure 13 to pass through and connect with the frame 11, so that the bottom protection plate 121 is kept relatively fixed with the frame 11 by the locking structure 13. In some embodiments, the height of the fixing protrusion 1216 relative to the surface of the side of the bottom protection plate 121 away from the accommodating cavity 110 can be less than the height of the buffer protrusion 1213 relative to the surface of the side of the bottom protection plate 121 away from the accommodating cavity 110. In this way, when the bottom protection plate 121 is impacted or pressed by an external structure, the external structure can more likely impact or press the buffer protrusion 1213 first, so as to reduce the risk of the mounting protrusion of the bottom protection plate 121 being pressed or impacted, and the connection stability of the bottom protection plate 121 with the frame 11 is improved.

[0197] In some embodiments, the third abutting portion 130 can be provided on the side of the fixing protrusion 1216 away from the accommodating cavity 110. The third abutting portion 130 abuts against the side of the fixing protrusion 1216 away from the accommodating cavity 110, so that the third abutting portion 130 can apply a force to the fixing protrusion 1216 towards the frame 11, and the connection of the bottom protection plate 121 with the frame 11 is more stable.

[0198] In some embodiments, the height of the third abutting portion 130 relative to the surface of the side of the bottom protection plate 121 away from the accommodating cavity 110 can be less than or equal to the height of the buffer protrusion 1213 relative to the surface of the side of the bottom protection plate 121 away from the accommodating cavity 110. In this way, the risk of the third abutting portion 130 being pressed or impacted can be reduced by the buffer protrusion 1213, and the connection stability of the bottom protection plate 121 with the frame 11 is improved.

[0199] Continuing to refer to Figure 17 The side of the bottom protection plate 121 towards the accommodating cavity 110 has a recessed cavity 1217 corresponding to the position of the fixing protrusion 1216. The locking structure 13 includes a third locking piece 131 and a connecting piece 132. The connecting piece 132 is connected with the frame 11, and the third locking piece 131 passes through the fixing protrusion 1216 and is connected with the connecting piece 132, so that the third locking piece 131 connects the bottom protection plate 121 with the frame 11. In some embodiments, at least part of the connecting piece 132 is located in the recessed cavity 1217. In this way, the connection of the connecting piece 132 with the frame 11 is more convenient, and part of the connecting piece 132 does not protrude from the surface of the frame 11 towards the bottom protection plate 121 and interfere with the fixing protrusion 1216.

[0200] In some embodiments, a portion of the bottom guard plate 121 protrudes in a direction away from the receiving cavity 110 to form a fixed protrusion 1216. This makes it easier to process the fixed protrusion 1216 and the clearance cavity 1217, and the fixed protrusion 1216 can improve the yield strength of the bottom guard plate 121 at the edge to a certain extent.

[0201] In some embodiments, the fixing protrusion 1216 can be located at the edge of the bottom guard plate 121 so that the locking structure 13 can connect the fixing protrusion 1216 to the side beam 111, front beam 113, or rear beam 114 of the frame 11. A fourth opening 1218 communicating with the clearance cavity 1217 can be formed at the edge of the bottom guard plate 121, thereby bringing the fixing protrusion 1216 as close as possible to the edge of the bottom guard plate 121, which helps to reduce the space occupied by the fixing protrusion 1216 in the bottom guard plate 121.

[0202] In some embodiments, the number of fixing protrusions 1216 can be multiple, and the multiple fixing protrusions 1216 are spaced apart along the edge of the bottom guard plate 121. Thus, the multiple fixing protrusions 1216 can be connected to the frame 11 through the locking structure 13, which helps to improve the connection strength between the bottom guard plate 121 and the frame 11.

[0203] In some embodiments, at least a portion of the fixing protrusion 1216 and the buffer protrusion 1213 may be located on the same side edge of the bottom guard plate 121. The fixing protrusion 1216 and the buffer protrusion 1213 are alternately arranged along the corresponding edge extension direction, so that the buffer protrusion 1213 can better protect the fixing protrusion 1216 and the locking structure 13.

[0204] In this embodiment, the first locking member 151, the second locking member 152, and the third locking member 131 can be bolts, screws, or other locking components, which are not limited here.

[0205] like Figure 18 and Figure 19 As shown, the base plate assembly 12 includes a temperature regulating plate 123, a bottom protective plate 121, and a sealing element 1232. The temperature regulating plate 123 has a flow channel (not shown) for the flow of temperature regulating medium. The bottom protective plate 121 and the temperature regulating plate 123 are stacked together. The sealing element 1232 is sandwiched between the temperature regulating plate 123 and the bottom protective plate 121 to form a seal between the temperature regulating plate 123 and the bottom protective plate 121, reducing the risk of impurities entering the gap between the temperature regulating plate 123 and the bottom protective plate 121.

[0206] In some embodiments, the seal 1232 may be disposed along the edge of the bottom guard plate 121, and the seal 1232 includes a meandering segment 1234 that extends meanderingly along the edge of the bottom guard plate 121.

[0207] The bottom plate assembly 12 provided by the embodiments of the present application can improve the length of the sealing piece 1232 and the sealing effect of the sealing piece 1232 by arranging the sealing piece 1232 along the edge of the bottom guard plate 121 and arranging the sealing piece 1232 to extend along the edge of the bottom guard plate 121 in a meandering manner.

[0208] In some embodiments, as shown in Figure 19 the edge of the bottom guard plate 121 away from the temperature adjusting plate 123 can be provided with a protruding portion 1212, and the surface of the bottom guard plate 121 facing the temperature adjusting plate 123 can be recessed to form a recessed portion 1224 corresponding to the position of the protruding portion 1212, so that at least part of the meandering segment 1234 extends along the contour of the recessed portion 1224, thereby making the meandering segment 1234 extend along the edge of the bottom guard plate 121 in a meandering manner.

[0209] In some embodiments, the number of protruding portions 1212 is multiple, and the multiple protruding portions 1212 are arranged at intervals along the edge of the bottom guard plate 121. At least part of the meandering segment 1234 is located between two adjacent recessed portions 1224 and extends along the corresponding edge. In this way, the length of the meandering segment 1234 extending along the circumference of the protruding portion 1212 is longer, which is conducive to improving the total length of the meandering segment 1234.

[0210] In some embodiments, the meandering segment 1234 includes a curved segment 1235 extending along the contour of the recessed portion 1224, and a connecting segment 1236 connected between two adjacent curved segments 1235, the connecting segment 1236 being located between two adjacent recessed portions 1224 and extending along the corresponding edge. In this way, the length of the curved segment 1235 extending along the contour of the recessed portion 1224 is as long as possible, and the meandering segment 1234 continuously extends along the length direction of the corresponding edge, which is conducive to improving the sealing effect of the meandering segment 1234.

[0211] In some embodiments, the protruding portion 1212 can include a fixing protrusion 1216 for the locking structure 13 to pass through to fix the temperature adjusting plate 123 and the bottom guard plate 121. By making the curved segment 1235 extend along the circumference of the fixing protrusion 1216, the meandering segment 1234 can be close to the fixing protrusion 1216, so that the meandering segment 1234 is subjected to a larger clamping force between the bottom guard plate 121 and the temperature adjusting plate 123, and the compression ratio of the sealing segment 1233 is higher, which is conducive to improving the sealing effect of the meandering segment 1234. The structure of the fixing protrusion 1216 can refer to the above-mentioned embodiments, which will not be described here.

[0212] Of course, the protruding portion 1212 can also be a buffer protrusion 1213 or other protruding structure arranged close to the edge of the bottom guard plate 121, which is not limited here.

[0213] In some embodiments, as shown in FIG. 1, the frame 11 comprises a bottom guard plate 121, a temperature adjusting plate 123, and a sealing member 1232. The bottom guard plate 121 is arranged on the bottom of the frame 11, and the temperature adjusting plate 123 is arranged on the bottom guard plate 121. The temperature adjusting plate 123 is arranged to be capable of being heated or cooled to adjust the temperature of the frame 11. The sealing member 1232 is arranged on the temperature adjusting plate 123, and the sealing member 1232 is arranged to be capable of sealing the frame 11. Figure 20 and Figure 21 As shown in FIG. 1, the bottom guard plate 121 is provided with a plurality of connecting holes 1219 arranged along at least one side edge. The connecting holes 1219 penetrate the bottom guard plate 121 along the thickness direction of the bottom guard plate 121, and the connecting holes 1219 are used for the locking structure 13 to pass through. After the locking structure 13 passes through the connecting holes 1219, the locking structure 13 can be connected with the temperature adjusting plate 123 or the frame 11, so as to fix the bottom guard plate 121 with the temperature adjusting plate 123 or the frame 11.

[0214] In some embodiments, at least part of the meandering segment 1234 can extend along the circumferential direction of the connecting hole 1219. In this way, the meandering segment 1234 can be close to the connecting hole 1219, and the temperature adjusting plate 123 and the bottom guard plate 121 can exert a larger clamping force on the meandering segment 1234, so that the sealing effect of the meandering segment 1234 is higher.

[0215] In some embodiments, the connecting hole 1219 comprises a plurality of first sub-connecting holes 1220 and a plurality of second sub-connecting holes 1221. The plurality of first sub-connecting holes 1220 are closer to the corresponding edge than the second sub-connecting holes 1221. The plurality of first sub-connecting holes 1220 and the second sub-connecting holes 1221 are arranged along the corresponding edge extension direction and are arranged in a staggered manner. The plurality of first sub-connecting holes 1220 and the plurality of second sub-connecting holes 1221 are used for the locking structure 13 to pass through, so as to improve the installation stability of the bottom guard plate 121.

[0216] In some embodiments, the meandering segment 1234 is located between the plurality of first sub-connecting holes 1220 and the plurality of second sub-connecting holes 1221. At least part of the meandering segment 1234 extends along the circumferential direction of the first sub-connecting hole 1220, and / or at least part of the meandering segment 1234 extends along the circumferential direction of the second sub-connecting hole 1221. In this way, the meandering segment 1234 can extend in a meandering manner between the plurality of first sub-connecting holes 1220 and the plurality of second sub-connecting holes 1221, and the bottom guard plate 121 has a better sealing effect at the positions where the first sub-connecting holes 1220 and the second sub-connecting holes 1221 are arranged.

[0217] In some embodiments, the sealing member 1232 comprises a sealing segment 1233 close to one side edge of the bottom guard plate 121. The sealing segment 1233 comprises a meandering segment 1234, and the ratio of the total length of the meandering segment 1234 included in the sealing segment 1233 to the length of the sealing segment 1233 is greater than or equal to 0.5 and less than or equal to 1. In this way, the sealing segment 1233 has a longer length, so as to improve the sealing effect of the sealing segment 1233.

[0218] The ratio of the total length of the meandering section 1234 included in the sealing section 1233 to the length of the sealing section 1233 can be 0.6, 0.63, 0.68, 0.7, 0.75, 0.8, 0.9, etc., and no restriction is imposed here.

[0219] In some embodiments, the ratio of the total length of the sealing segment 1233 included in the seal 1232 to the total length of the seal 1232 can be greater than or equal to 0.5 and less than or equal to 1, thereby making the total length of the sealing segment 1233 longer, which is beneficial to improving the overall sealing effect of the seal 1232.

[0220] The ratio of the total length of the sealing segment 1233 included in the sealing element 1232 to the total length of the sealing element 1232 can be 0.6, 0.63, 0.68, 0.7, 0.75, 0.8, 0.9, etc., and is not limited here.

[0221] In some embodiments, the seal 1232 includes multiple meandering segments 1234 distributed around the bottom cover plate 121. This increases the overall length of the seal 1232, enabling it to provide a better sealing effect around the bottom cover plate 121.

[0222] In some embodiments, such as Figure 19 As shown, a mounting groove 1222 is recessed on the side of the bottom protective plate 121 facing the temperature regulating plate 123, and at least part of the seal 1232 is disposed in the mounting groove 1222. This allows for more stable installation of the seal 1232, thereby improving the sealing effect of the seal 1232.

[0223] In some embodiments, the depth of the mounting groove 1222 may be less than or equal to the thickness of the seal 1232, so that the seal 1232 provided in the mounting groove 1222 can be squeezed by the temperature regulating plate 123 and the bottom guard plate 121, so that the seal 1232 has a better sealing effect.

[0224] In some embodiments, the ratio of the depth of the mounting groove 1222 to the thickness of the seal 1232 can be greater than or equal to 0.5 and less than or equal to 1, so that the seal 1232 has a larger compression ratio after being squeezed by the temperature regulating plate 123 and the bottom guard plate 121, thereby improving the sealing effect of the seal 1232.

[0225] The ratio of the depth of the mounting groove 1222 to the thickness of the seal 1232 can be 0.55, 0.6, 0.63, 0.68, 0.7, 0.75, 0.8, 0.9, etc., and is not limited here.

[0226] In some embodiments, the thickness of the seal 1232 may be greater than or equal to 1 mm and less than or equal to 2 mm, thereby making the seal 1232 thicker and having a larger compression ratio when the seal 1232 is squeezed by the temperature regulating plate 123 and the bottom guard plate 121.

[0227] In some embodiments, the ratio of the depth of the mounting groove 1222 to the thickness of the seal 1232 may be greater than or equal to 0.7 and less than or equal to 0.95, so as to further improve the compression ratio of the seal 1232 provided in the mounting groove 1222 after being squeezed by the temperature regulating plate 123 and the bottom guard plate 121.

[0228] The ratio of the depth of the mounting groove 1222 to the thickness of the seal 1232 can be 0.75, 0.78, 0.8, 0.83, 0.85, 0.88, 0.9, 0.92, etc., and is not limited here.

[0229] In some embodiments, the bottom cover plate 121 and the temperature regulating plate 123 may be bonded to the seal 1232 respectively. Thus, when the seal 1232 includes the meandering section 1234, the bonding area between the seal 1232 and the bottom cover plate 121 and the temperature regulating plate 123 can be increased, thereby improving the connection strength between the bottom cover plate 121 and the temperature regulating plate 123.

[0230] In some embodiments, a buffer element may be provided between the bottom guard plate 121 and the temperature regulating plate 123 to reduce the deformation caused by the bottom guard plate 121 impacting the temperature regulating plate 123. The buffer element may be an elastic component such as foam, sponge, or rubber, and there is no limitation herein.

[0231] In addition, a polyvinyl chloride (PVC) coating can be applied to the surface of the bottom guard plate 121 facing away from the temperature regulating plate 123 to improve the corrosion resistance of the bottom guard plate 121.

[0232] In some embodiments, such as Figure 2 As shown, the battery box 10 includes a frame 11 and a base plate assembly 12. The frame 11 includes a battery compartment 1101 and an electrical compartment 1102. The battery compartment 1101 is used to accommodate batteries 171, and the electrical compartment 1102 is used to accommodate electrical components. The base plate assembly 12 includes a temperature regulating plate 123 and a bottom protective plate 121 stacked together. The temperature regulating plate 123 has a flow channel for the flow of temperature regulating medium. One side of the temperature regulating plate 123 faces the receiving cavity 110, and the bottom protective plate 121 is located on the side of the temperature regulating plate 123 away from the receiving cavity 110.

[0233] Among them, such as Figure 10 , Figure 11 and Figure 18As shown, the temperature adjustment plate 123 can include a connecting portion 1231 for connecting with the external pipeline, which extends outward from the outer side of the frame body 11 along the direction from the electrical compartment 1102 to the battery compartment 1101.

[0234] The battery box 10 provided by the embodiments of the present application can reduce the risk that the temperature adjustment medium flows into the accommodation cavity 110 after leaking from the connecting portion 1231 and the external pipeline, causing the short circuit of the battery 171 or the electrical device in the accommodation cavity 110. At the same time, the connecting portion 1231 does not occupy the accommodation space, which is conducive to improving the utilization rate of the accommodation space. In addition, the flow path of the external pipeline to the flow channel inside the temperature adjustment plate 123 can be shortened, which is conducive to improving the temperature adjustment efficiency of the temperature adjustment plate 123. Moreover, the connecting portion 1231 is arranged away from the electrical compartment 1102, which can further reduce the risk that the temperature adjustment medium leaking from the connecting portion 1231 or the external pipeline enters the electrical compartment 1102, causing the short circuit of the electrical device in the electrical compartment 1102.

[0235] In some embodiments, a fixing structure 118 can be arranged on the outer side of the frame body 11 along the direction from the electrical compartment 1102 to the battery compartment 1101, and the fixing structure 118 is used for connecting with the external pipeline. In this way, the external pipeline can be fixed by the fixing structure 118, so as to avoid that the external pipeline exerts a large force on the connecting portion 1231, causing the connecting portion 1231 to be deformed and further affecting the connection stability between the external pipeline and the connecting portion 1231.

[0236] In some embodiments, the fixing structure 118 can include an adapter pipe 1181 connected with the connecting portion 1231, and the adapter pipe 1181 is used for connecting with the external pipeline. In this way, the external pipeline can be connected with the connecting portion 1231 through the adapter pipe 1181, so as to make the external pipeline and the flow channel inside the temperature adjustment plate 123 communicate, facilitating the flow of the temperature adjustment medium between the external pipeline and the flow channel of the temperature adjustment plate 123. Moreover, when the external pipeline exerts a force on the adapter pipe 1181, the adapter pipe 1181 can transmit at least part of the force to the frame body 11, so that the connecting portion 1231 is subjected to a smaller force, thereby reducing the risk of deformation of the connecting portion 1231.

[0237] In some embodiments, the fixing structure 118 can further include a fixing portion 1184 connected with the outer side of the frame body 11, and the fixing portion 1184 is connected with the adapter pipe 1181, so as to make the connection between the adapter pipe 1181 and the frame body 11 more stable and convenient.

[0238] In some embodiments, the adapter pipe 1181 comprises an input pipe 1182 and an output pipe 1183, which are connected with the connecting part 1231 respectively. In this way, the external pipeline can input the temperature adjusting medium into the flow channel of the temperature adjusting plate 123 through the input pipe 1182, and the temperature adjusting medium in the flow channel of the temperature adjusting plate 123 can be returned to the external pipeline through the output pipe 1183, so that the recycling of the temperature adjusting medium can be realized.

[0239] Specifically, the external pipeline comprises two connecting pipes, one of which is connected with the input pipe 1182, and the other of which is connected with the output pipe 1183.

[0240] In some embodiments, the orthographic projection of the fixing structure 118 and the orthographic projection of the connecting part 1231 at least partially overlap on the projection plane perpendicular to the direction of the bottom plate assembly 12 to the frame 11, so that the fixing structure 118 is closer to the connecting part 1231, and the fixing structure 118 and the connecting part 1231 are connected. Wherein, the direction of the bottom plate assembly 12 to the frame 11 is substantially parallel to the third direction Z.

[0241] In some embodiments, the orthographic projection of the bottom guard plate 121 and the orthographic projection of the connecting part 1231 at least partially overlap on the projection plane perpendicular to the direction of the bottom plate assembly 12 to the frame 11. In this way, the bottom guard plate 121 can protect the connecting part 1231, and reduce the risk of deformation of the connecting part 1231 caused by external structure impact or extrusion.

[0242] Wherein, the bottom guard plate 121 can comprise a protection part 1223, which protrudes from the outer side of the frame 11 along the direction of the electrical compartment 1102 to the battery compartment 1101. The orthographic projection of the protection part 1223 covers the orthographic projection of the connecting part 1231 on the projection plane perpendicular to the direction of the bottom plate assembly 12 to the frame 11, thereby improving the protection effect of the bottom guard plate 121 on the connecting part 1231.

[0243] In some embodiments, an adhesive layer (not shown in the figure) can be further arranged between the protection part 1223 and the connecting part 1231, and the protection part 1223 is adhered to the connecting part 1231 through the adhesive layer, thereby improving the connection strength between the bottom guard plate 121 and the connecting part 1231.

[0244] The embodiments of the present application also provide a battery box, which comprises at least one of a frame, a control assembly and a bottom plate assembly. The specific structures of the frame, the control assembly and the bottom plate assembly are referred to the above embodiments. Since the battery box adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0245] The battery pack provided by the embodiments of the present application also includes at least one of a frame, a control assembly, a bottom plate assembly and a battery box. The specific structure of the frame, the control assembly, the bottom plate assembly and the battery box is referred to the above embodiments. Since the battery pack adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0246] In some embodiments, the battery pack 1 includes a battery box 10 and a battery assembly 17. The battery box 10 is as above. The battery box 10 includes a frame 11 and a mounting beam assembly 115. The frame 11 encloses a receiving cavity 110. The mounting beam assembly 115 is connected to one side of the frame 11 along the first direction X. The mounting beam assembly 115 includes a connecting structure 1154 connected to the frame 11. The connecting structure 1154 and the frame 11 enclose a cavity 1150. The connecting structure 1154 is provided with a first abutting surface 1163 and a second abutting surface 1164. The first abutting surface 1163 and the second abutting surface 1164 are in abutment with the frame 11, and the first abutting surface 1163 and the second abutting surface 1164 are flush. The connecting structure 1154 includes at least two curved segments 1165 connected to each other, and the bending directions of the adjacent curved segments 1165 are different. The battery assembly 17 includes a plurality of batteries 171. The battery assembly 17 is arranged in the receiving cavity 110 of the battery box 10.

[0247] The embodiments of the present application are described in detail above. The specific examples are applied to the principles and implementation modes of the present application. The above embodiment descriptions are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery box, characterized in that, include: A frame, the frame enclosing a receiving cavity; A mounting beam assembly is connected to one side of the frame along a first direction. The mounting beam assembly includes a connecting structure connected to the frame. The connecting structure and the frame enclose a cavity. The connecting structure is provided with a first abutting surface and a second abutting surface. Both the first abutting surface and the second abutting surface abut against the frame, and the first abutting surface and the second abutting surface are flush. The connection structure includes at least two interconnected curved segments, and the bending directions of adjacent curved segments are different.

2. The battery box as described in claim 1, characterized in that, The connecting structure extends along a second direction, and the connecting structure and the frame enclose the cavity extending along the second direction, with the second direction forming an angle with the first direction.

3. The battery box as described in claim 2, characterized in that, The connection structure includes a first connecting plate and a second connecting plate arranged along a third direction, wherein the first direction, the second direction and the third direction form an angle with each other; The first connecting plate and the second connecting plate are respectively connected to the frame and enclose the cavity. The first connecting plate includes at least two interconnected curved sections, and the bending directions between adjacent curved sections are different; and / or, the second connecting plate is at least partially bent toward the cavity or bent away from the cavity.

4. The battery box as described in claim 3, characterized in that, The first abutting surface is disposed on the first connecting plate, and the second abutting surface is disposed on the second connecting plate; On the cross-section of the mounting beam assembly perpendicular to the second direction, the endpoint of the first abutment surface closest to the cavity is the first contact point, the endpoint of the second abutment surface closest to the cavity is the second contact point, and the endpoint of the contact surface of the first connecting plate and the second connecting plate closest to the cavity is the third contact point. The angle θ formed by the line connecting the first contact point and the third contact point and the line connecting the second contact point and the third contact point is 30°-80°.

5. The battery box as described in claim 3 or 4, characterized in that, The spacing between the first connecting plate and the second connecting plate tends to increase along the direction closer to the frame.

6. The battery box as described in claim 5, characterized in that, The first connecting plate is farther from the bottom of the battery box than the second connecting plate; the first connecting plate includes a first curved panel and a second curved panel connected sequentially along the direction close to the frame, one of the first curved panel and the second curved panel is bent in the direction toward the cavity, and the other of the first curved panel and the second curved panel is bent in the direction away from the cavity.

7. The battery box as described in claim 6, characterized in that, The first curved panel is bent toward the cavity, and the second curved panel is bent away from the cavity.

8. The battery box as described in claim 6, characterized in that, The first connecting plate further includes a third curved panel, which is connected to the end of the second curved panel away from the first curved panel. One of the second curved panel and the third curved panel is bent in a direction toward the cavity, and the other of the second curved panel and the third curved panel is bent in a direction away from the cavity.

9. The battery box as described in claim 8, characterized in that, The length of the first curved panel extending away from the frame is greater than or equal to 0.5 cm and less than or equal to 0.85 cm; and / or, The second curved panel extends in a direction away from the frame for a length greater than or equal to 0.6 cm and less than or equal to 1 cm; and / or, The length of the third curved panel extending away from the frame is greater than or equal to 0.5 cm and less than or equal to 0.8 cm.

10. The battery box as claimed in claim 8, characterized in that, The sum of the lengths of the first curved panel, the second curved panel, and the third curved panel extending away from the frame is greater than or equal to 2 cm and less than or equal to 3 cm; and / or, The length of the second curved panel extending away from the frame is greater than the lengths of the first curved panel and the third curved panel extending away from the frame.

11. The battery box as described in any one of claims 1 to 10, characterized in that, The connecting structure extends along the second direction, and the cross-sectional area of ​​the cavity perpendicular to the second direction is greater than or equal to 2 square centimeters and less than or equal to 5 square centimeters.

12. A battery pack, characterized in that, include: A battery box, wherein the battery box is the battery box according to any one of claims 1 to 11; A battery assembly, comprising multiple batteries, is disposed within the receiving cavity of the battery case.

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