Battery pack guide and limit device, battery pack, battery pack assembly and electric vehicle

Abstract

This invention discloses a guide and limiting device for a battery pack, a battery pack, a battery pack assembly, and an electric vehicle. The guide and limiting device for the battery pack includes a housing, an elastic mechanism, and a limiting member. The housing has a receiving cavity and a limiting hole. The elastic mechanism and the limiting member are disposed within the receiving cavity, and the side of the limiting member opposite to the elastic mechanism has a protrusion that passes through and protrudes from the limiting hole. The elastic mechanism is pressed into the receiving cavity by the limiting member and the housing, and the limiting member and the housing are floatingly connected via the elastic mechanism. In this invention, by setting an elastic mechanism within the housing, a floating connection is achieved between the housing and the elastic member, ensuring stable installation of the battery pack and battery mounting base and preventing jamming. It also reduces the alignment requirements of the battery pack during installation, thereby improving installation efficiency.

Description

Technical Field

[0001] This invention relates to a guide and limiting device for a battery pack, a battery pack, a battery pack assembly, and an electric vehicle. Background Technology

[0002] Electric vehicles contain a battery pack, within which the battery cells serve as the power source. The battery pack is mounted on the vehicle's frame via a battery mount, remaining fixed in place during normal use. When replacing the battery, the depleted battery pack must be removed from the mount, and a fully charged battery pack installed. During installation, the stability of the battery pack and its alignment with the frame are crucial; otherwise, damage to the battery pack can easily occur. After installation, the reliability between the battery pack and the battery mount is also important. In existing technologies, the stability of the battery pack during installation and its reliability with the battery mount after installation need improvement. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and provide a guide and limiting device for a battery pack, a battery pack, a battery pack assembly, and an electric vehicle.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A guide and limiting device for a battery pack, comprising:

[0006] The housing has a receiving cavity and a limiting hole;

[0007] An elastic mechanism and a limiting member are provided in the receiving cavity, and the side of the limiting member opposite to the elastic mechanism has a protrusion that passes through and protrudes from the limiting hole. The elastic mechanism is pressed into the receiving cavity by the limiting member and the housing, and the limiting member and the housing are floatingly connected by the elastic mechanism.

[0008] Preferably, the elastic mechanism includes a spring sheet, the two ends of which abut against the limiting member and the housing, respectively; wherein, the elastic mechanism has one spring sheet, or the elastic mechanism has multiple spring sheets spaced apart.

[0009] or,

[0010] The elastic mechanism includes an elastic rubber block, the two ends of which abut against the limiting member and the housing, respectively;

[0011] or,

[0012] The elastic mechanism includes an elastic element, which is any one or more of a helical spring, a disc spring, and a pagoda spring.

[0013] Preferably, a limiting protrusion for radially limiting the elastic mechanism is fixed inside the housing, and the elastic mechanism is sleeved or inserted into the limiting protrusion;

[0014] And / or, the limiting member has a limiting ring, and the elastic mechanism is sleeved or inserted into the limiting ring;

[0015] And / or, the limiting member has a limiting groove, and the elastic mechanism is engaged in the limiting groove.

[0016] Preferably, the side of the limiting member facing the elastic mechanism has a limiting matching portion, which is one or more of a limiting protrusion, a limiting ring, or a limiting groove.

[0017] Preferably, the limiting member has a plurality of recesses on one side having the limiting matching portion, and strip ribs are provided between the plurality of recesses.

[0018] Preferably, the limiting matching part is an annular rib, the elastic mechanism is inserted into or sleeved on the annular rib, and the annular rib is provided with a plurality of blind holes.

[0019] Preferably, the radius of the blind hole gradually decreases from the center of the annular rib outwards.

[0020] Preferably, the strip rib connects the annular rib and the sidewall of the recess.

[0021] Preferably, the shape of the limiting hole matches that of the protrusion, and the periphery of the protrusion abuts against the inner wall surface of the limiting hole or has a gap of 0.5-5mm reserved.

[0022] Preferably, the limiting hole is provided on the mounting surface of the housing, and the housing also has a housing guide surface, which extends gradually from one end of the housing toward the mounting surface and is inclined relative to the mounting surface.

[0023] Preferably, the protruding end of the protrusion of the limiting member has a limiting surface, and the protrusion also has a limiting guide surface that is inclined from the top of the protrusion toward the limiting surface.

[0024] Preferably, the housing comprises:

[0025] The inner shell has an inner cavity that opens at one end;

[0026] The outer shell has an outer shell guide surface and the limiting hole, the outer shell covers the inner cavity and is detachably connected to the inner shell.

[0027] Preferably, the outer shell has a snap-fit ​​hole on its side wall, and the inner shell has a snap-fit ​​block on its outer side wall. The snap-fit ​​block is sequentially connected to a guide surface, a transition surface, and a snap-fit ​​surface. The first end of the guide surface is connected to the side wall of the inner shell, the transition surface is parallel to the side wall of the inner shell, and the snap-fit ​​surface is perpendicular to and connected to the side wall of the inner shell.

[0028] Alternatively, a snap-fit ​​block is provided on the inner sidewall of the outer shell, and a snap-fit ​​hole is provided on the sidewall of the inner shell, with the snap-fit ​​block snapping into the snap-fit ​​hole.

[0029] Preferably, the outer casing guide surface is connected to three sides of the outer casing and the end face of the outer casing, respectively.

[0030] And / or, the angle of inclination of the housing guide surface relative to the limiting surface is less than 45°;

[0031] And / or, both the outer shell and the inner shell are provided with a drain hole that connects the receiving cavity and the outside, and the drain hole is located at one end opposite to the guide surface of the outer shell;

[0032] And / or, the middle portion of the inner shell has a limiting protrusion recessed toward the inner cavity for radially limiting the elastic mechanism;

[0033] And / or, the inner shell has a plurality of threaded posts protruding toward the inner cavity, the threaded posts having threaded holes, the threaded holes being through holes;

[0034] And / or, the inner shell has a plurality of inner shell mounting surfaces, and an inner shell groove is provided in an area of ​​the inner shell that avoids the inner shell mounting surfaces and is recessed toward the inner cavity;

[0035] And / or, one end of the inner shell corresponding to the outer shell guide surface has an outer shell groove recessed toward the outer shell;

[0036] And / or, the inner shell has an inclined transition surface, one end of the inner shell corresponding to the outer shell guide surface is recessed toward the inner cavity, and is connected to the inner shell mounting surface through the inclined transition surface;

[0037] And / or, the inner shell has a bevel cut on its side to allow clearance for the outer shell guide surface.

[0038] A battery pack includes a battery pack body and a battery pack guide and limiting device as described in any of the preceding claims, the battery pack body having a side mounting surface, the battery pack being mounted on the side mounting surface by the guide and limiting device.

[0039] Preferably, the height of the battery pack guide limiting device above the upper mounting surface of the battery pack body is greater than the projected length of the outer shell guide surface on the housing.

[0040] A battery pack assembly includes a battery mounting base and a guide and limiting device for the battery pack as described in any of the preceding claims, wherein one end of the housing opposite to the limiting hole is detachably connected to the battery pack; when the battery pack is installed on the battery mounting base, the battery mounting base is guided to the limiting surface via the outer shell guide surface located on the housing and then abuts against the limiting surface.

[0041] An electric vehicle includes a battery pack assembly as described above.

[0042] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0043] The positive and progressive effects of this invention are as follows:

[0044] In this invention, by setting an elastic mechanism inside the housing, a floating connection between the housing and the elastic element is achieved. This not only ensures the stable installation of the battery pack and battery mounting base and avoids jamming, but also reduces the requirements for aligning the battery pack during installation, thereby improving installation efficiency. Attached Figure Description

[0045] Figure 1 This is a partial structural schematic diagram of a battery pack assembly according to an embodiment of the present invention;

[0046] Figure 2 This is a partial structural diagram of the battery pack assembly in its installation state according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention.

[0049] Figure 5 This is a schematic diagram of the structure of a positioning component according to an embodiment of the present invention;

[0050] Figure 6 This is a cross-sectional view of a positioning component according to an embodiment of the present invention;

[0051] Figure 7 The images show a comparison of the positioning components of this invention before and after installation, with the left side showing the image before installation and the right side showing the image after installation.

[0052] Figure 8 This is a schematic diagram of the structure of a limiting member according to an embodiment of the present invention;

[0053] Figure 9 This is a schematic diagram of the structure of a limiting member according to an embodiment of the present invention;

[0054] Figure 10This is a schematic diagram of the structure of a limiting member according to an embodiment of the present invention;

[0055] Figure 11 This is an exploded view of a positioning component according to an embodiment of the present invention;

[0056] Figure 12 This is a schematic diagram of the outer casing according to an embodiment of the present invention;

[0057] Figure 13 This is a schematic diagram of the outer casing according to an embodiment of the present invention;

[0058] Figure 14 This is a schematic diagram of the outer casing according to an embodiment of the present invention;

[0059] Figure 15 This is a schematic diagram of the outer casing according to an embodiment of the present invention;

[0060] Figure 16 This is an exploded view of a battery pack guide and limiting device according to an embodiment of the present invention;

[0061] Figure 17 for Figure 16 Another exploded view of the guide and limiting device for the battery pack shown;

[0062] Figure 18 This is an exploded view of a battery pack guide and limiting device according to an embodiment of the present invention;

[0063] Figure 19 for Figure 18 Another exploded view of the guide and limiting device for the battery pack shown;

[0064] Figure 20 This is an exploded view of a battery pack guide and limiting device according to an embodiment of the present invention;

[0065] Figure 21 for Figure 20 Another exploded view of the guide and limiting device for the battery pack shown;

[0066] Figure 22 This is an exploded view of a limiting device for a battery pack according to an embodiment of the present invention;

[0067] Figure 23 for Figure 22 Another exploded view of the limiting device for the battery pack shown;

[0068] Figure 24 This is an exploded view of a limiting device for a battery pack according to an embodiment of the present invention;

[0069] Figure 25 for Figure 24 Another exploded view of the limiting device for the battery pack shown.

[0070] Explanation of reference numerals in the attached figures:

[0071] Battery pack assembly 1000

[0072] Battery pack 100

[0073] Battery pack body 1

[0074] Side mounting surface 11

[0075] Positioning component 2

[0076] Casing 21

[0077] Receptacle 211

[0078] Limiting hole 212

[0079] Limiting protrusion 213

[0080] Reception tank 214

[0081] Inner shell 215

[0082] Casing 216

[0083] Inner cavity 217

[0084] Drain hole 218

[0085] 219 SIM card slot

[0086] 2110 card connector

[0087] Guide surface 2111

[0088] Transition surface 2112

[0089] 2113 SIM card slot

[0090] Mounting surface 2114

[0091] Housing mounting surface 2115

[0092] 2116 outer casing groove

[0093] 2117 housing guide surface

[0094] Gap 2118

[0095] First motherboard 2119

[0096] First enclosure panel 2120

[0097] Threaded column 2121

[0098] Inner shell mounting surface 2122

[0099] Inner shell groove 2123

[0100] Second motherboard 2124

[0101] Second enclosure 2125

[0102] Battery pack guide and limit device 2126

[0103] Limiting device 2127 for battery pack

[0104] Inclined transition surface 2128

[0105] Limiting component 22

[0106] Protrusion 221

[0107] Limiting surface 222

[0108] Limiting ring 223

[0109] Recess 224

[0110] 225 strip bars

[0111] Limiting guide surface 226

[0112] Base 227

[0113] 228 ring reinforcement bars

[0114] Blind hole 229

[0115] Flexible mechanism 23

[0116] Elastic component 231

[0117] Battery holder 3

[0118] Side positioning surface 31 Detailed Implementation

[0119] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described below.

[0120] This invention provides an electric vehicle having a battery pack assembly 1000 mounted on a frame.

[0121] Please see Figure 1-2 This invention provides a battery pack assembly 1000, which is applied to the electric vehicle described in the above embodiments.

[0122] The battery pack assembly 1000 includes a battery pack 100 and a battery mounting base 3. The battery mounting base 3 is used to mount the battery pack 100 onto the vehicle frame, and has a space in the middle for placing the battery pack 100. The battery pack 100 includes a battery pack body 1 and a positioning module. The battery pack body 1 has a side mounting surface 11, which can be any one of the front, rear, left, or right sides. The battery mounting base 3 has a side positioning surface 31 corresponding to the side mounting surface 11. The positioning module is detachably connected to the battery pack body 1 and is located on the two side mounting surfaces 11. When the battery pack 100 is mounted on the battery mounting base 3, the battery pack 100 moves from bottom to top, and the positioning module gradually contacts the battery mounting base 3, guiding each other until positioning is completed.

[0123] In this embodiment of the invention, the positioning module can be set on two oppositely arranged side mounting surfaces 11. The battery holder 3 has two side positioning surfaces 31 that correspond one-to-one with the side mounting surfaces 11. The two side positioning surfaces 31 are located outside the side mounting surfaces 11, which makes it easier for the battery pack 100 to remain stable during the process of being installed into the battery holder 3.

[0124] During the process of installing the battery pack body 1 onto the battery mounting base 3, the positioning module is first fixed to the side mounting surface 11. The positioning module and the side positioning surface 31 form a guiding relationship. The positioning module and the side positioning surface 31 gradually come into contact and slide relative to each other until the positioning module moves from the side mounting surface 31. Figure 2 The state shown has been reached. Figure 1 After reaching the indicated state, the battery pack body 1 is fixed to the battery mounting base 3. At this time, the positioning module and the side positioning surface 31 abut against each other, thereby stably positioning the battery pack body 1 on the battery mounting base 3.

[0125] like Figure 3 and Figure 4 As shown in the embodiment of the present invention, in the battery pack 100, the positioning module includes a plurality of positioning components 2 spaced apart on the side mounting surface 11, so as to improve the positioning effect of the battery pack 100 and the battery fixing seat 3, enhance the stability of both, and avoid the battery pack 100 from swaying left and right due to the gap between the battery pack 100 and the battery fixing seat 3 during the driving of the electric vehicle, which would affect the stability and safety of the battery pack 100 installation.

[0126] This invention also provides a positioning component 2, which is applied to the battery pack 100 described above. The following description focuses on the positioning component 2 and its application in the battery pack 100 and the battery pack assembly 1000.

[0127] like Figure 5-6As shown in the embodiment of the present invention, the positioning component 2 includes a housing 21 and a limiting member 22. The housing 21 has a receiving cavity 211 and a limiting hole 212. The limiting member 22 is disposed within the receiving cavity 211, with one end extending out of the limiting hole 212. The housing 21 is fixed to the side mounting surface 11. One end of the limiting member 22 extending out of the limiting hole 212 presses against the side positioning surface 31, while the other end directly or indirectly presses against the housing 21, thereby stably connecting the battery pack body 1 to the battery mounting base 3.

[0128] The positioning component 2 also includes an elastic mechanism 23. The side of the limiting member 22 opposite to the elastic mechanism 23 has a protrusion 221 that passes through and protrudes from the limiting hole 212. The protrusion 221 has a limiting surface 222 for abutting against the side positioning surface 31. In other words, the end of the protrusion 221 that protrudes from the limiting hole 212 is the protruding end, and the protruding end has the limiting surface 222, or it can be understood that the end face of the protrusion has the limiting surface 222. The elastic mechanism 23 is pressed into the receiving cavity 211 by the limiting member 22 and the housing 21, and has an elastic force perpendicular to the side positioning surface 31 or the limiting surface 222. The elastic mechanism 23 is pressed into the receiving cavity 211 by the limiting member 22 and the housing 21, so that when the battery pack body 1 is fixed on the battery fixing seat 3, the housing 21 and the limiting member 22 can be buffered by the elastic mechanism 23 to achieve a floating connection and avoid hard contact.

[0129] Please see Figure 7 For understanding, in this embodiment of the invention, the thickness of the housing 21 is c, and the thickness of the limiting member 22 protruding from the surface of the housing 21 in its natural state is d. This natural state refers to the state where the limiting member 22 is not yet clamped between the side positioning surface 31 and the side mounting surface 11. When the battery pack 100 is installed on the battery mounting base 3, the gap between the side mounting surface 11 of the battery pack body 1 and the side positioning surface 31 of the battery mounting base 3 is e, and the interference between the battery pack body 1 and the battery mounting base 3 is f. This interference is interpreted as the compression of the protrusion 221 after the battery pack body 1 with the positioning module is installed on the battery mounting base 3. Where: c + d = e + f; f is any value between 0.1 mm and 2 mm. By setting the interference within this range, both the installation positioning accuracy of the battery pack body 1 and the battery mounting base 3 can be guaranteed, as well as the reliability of their connection.

[0130] In this embodiment of the invention, the elastic mechanism 23 includes a spring sheet, with its two ends abutting against the limiting member 22 and the housing 21, respectively. The elastic mechanism 23 may have one spring sheet or multiple spaced spring sheets. The spring sheet enables a floating connection between the limiting member 22 and the housing 21, thereby achieving a floating connection between the battery pack body 1 and the battery pack mounting base 3. The interference fit can be controlled within a large range, allowing the battery pack body 1 to be quickly installed on the battery mounting base 3. The spring sheet has good elasticity and is not easily deformed or failed, which helps ensure the reliability of the connection between the battery pack body 1 and the battery mounting base 3.

[0131] In this embodiment of the invention, the elastic mechanism 23 includes an elastic rubber block, with its two ends abutting against the limiting member 22 and the housing 21, respectively. The rubber block enables a floating connection between the limiting member 22 and the housing 21, thereby achieving a floating connection between the battery pack body 1 and the battery pack mounting base 3. The rubber block is relatively stiff, allowing the interference fit to be controlled within a small range, resulting in a relatively stable connection between the battery pack body 1 and the battery mounting base 3.

[0132] In this embodiment of the invention, the elastic mechanism 23 includes an elastic element 231, which is any one or more of a helical spring, a disc spring, and a pagoda spring. The helical spring, disc spring, and pagoda spring can improve the uniformity of the force on the limiting element 22, thus making the deformation of the limiting element 22 more stable. This avoids the limiting element 22 from becoming unbalanced and locally tilting and jamming in the limiting hole 212 during the process of installing the battery pack body 1 onto the battery mounting base 3.

[0133] like Figure 6 , Figure 8 , Figure 9 As shown in this embodiment of the invention, a limiting protrusion 213 for radially limiting the elastic mechanism 23 is fixed inside the housing 21, and the elastic mechanism 23 is sleeved or inserted into the limiting protrusion 213. Furthermore, the elastic mechanism 23 uses the aforementioned elastic element 231, one end of which is inserted into or sleeved on the limiting protrusion 213. The limiting protrusion 213 positions and guides the elastic element 231, preventing the elastic element 231 from shifting during use and causing a change in the direction of the elastic force.

[0134] In this embodiment of the invention, the limiting member 22 has a limiting ring 223, and the elastic mechanism 23 is sleeved or inserted into the limiting ring 223. Furthermore, the elastic mechanism 23 is selected from the aforementioned elastic member 231, with one end of the elastic member 231 inserted into or sleeved on the limiting ring 223. The limiting ring 223 positions and guides the elastic member 231, preventing the elastic member 231 from shifting during use and causing a change in the direction of the elastic force.

[0135] In this embodiment of the invention, the limiting member 22 has a limiting groove, and the elastic mechanism 23 is inserted into the limiting groove. The limiting groove positions and guides the elastic member 231.

[0136] In this embodiment of the invention, the side of the limiting member 22 facing the elastic mechanism 23 has a limiting matching part. The limiting matching part is used to limit and / or position and / or guide the elastic mechanism 23 to improve the stability of the elastic mechanism 23. The limiting matching part is one or more of a limiting protrusion structure, annular limiting structure or limiting groove. The limiting protrusion structure is a structure that protrudes outward relative to the end face of the limiting member 22. The annular limiting structure is a structure with four surrounding rings.

[0137] In this embodiment of the invention, the side of the limiting member 22 with the limiting matching part is provided with a plurality of recesses 224, and strip ribs 225 are provided between the plurality of recesses 224. By setting the recesses 224 and the strip ribs 225, the rigidity and strength of the limiting part are guaranteed while saving materials, and defects such as stacking are not easy to occur in the molding process.

[0138] In this embodiment of the invention, the first end of the protrusion 221 (i.e., the first end of the limiting member) also has a limiting guide surface 226 inclined relative to the limiting surface 222, used to guide the limiting surface 222 to abut against the side positioning surface 31; wherein, the limiting guide surface 226 is located on the end face of the protrusion 221 facing the side positioning surface 31, and the limiting guide surface 226 is inclined from the top of the protrusion 221 toward the limiting surface 222. During the process of installing the battery pack body 1 onto the battery mounting base 3, the limiting guide surface 226 is used to guide the limiting surface 222 to abut against the side positioning surface 31, thereby avoiding the situation where the battery pack body 1 collides with the battery pack mounting base 3 due to inaccurate alignment. The angle formed by the limiting guide surface 226 and the limiting surface 222 does not exceed 45°, so as to facilitate a smooth transition between the battery pack body 1 and the battery mounting base 3 for installation.

[0139] In this embodiment of the invention, the limiting member 22 further includes a base 227 housed within the receiving cavity 211. A protrusion 221 protrudes from the base 227 and is located in the center of the base 227. The periphery of the protrusion 221 can abut against the inner wall surface of the limiting hole 212 to obtain higher stability, or a gap of 0.5-5mm can be reserved to obtain a certain adjustable margin and reduce jamming. When the limiting member 22 is in its natural state, the surface of the base 227 abuts against the inner surface of the housing 21 under the action of the elastic mechanism 23. After the battery pack 100 is fixed on the mounting base, the base 227 is pressed against the side mounting surface 11, thereby maintaining a gap with the inner wall surface of the near-side positioning surface 31 of the housing 21.

[0140] In this embodiment of the invention, the end of the limiting member 22 near the elastic mechanism 23 has the aforementioned recessed portion 224. The limiting member 22 also has several ribs disposed in the recessed portion 224; the ribs include annular ribs 228 and several strip ribs 225, and the annular ribs 228 can be the aforementioned limiting ring 223 or limiting groove. Several blind holes 229 are provided in the annular ribs 228, and the radius of these blind holes 229 gradually decreases from the center of the annular ribs 228 outwards. By providing these blind holes 229, defects in the molding process are reduced. The elastic mechanism 23 is inserted into or sleeved in the annular ribs 228. The two ends of each strip rib 225 are respectively connected to the annular rib 228 and the sidewall of the recessed portion 224, and the strip ribs 225 are arranged around the annular ribs 228, which improves the strength of the annular ribs 228 and the limiting member 22, while reducing the weight of the limiting member 22. In addition, the recessed portion 224 and the rib in this embodiment can also be understood as being provided on the base 227 of the limiting member 22.

[0141] like Figure 11 As shown in the embodiment of the present invention, the limiting surface 222 is a plane, and the end face (i.e., the mounting surface 2114) of the housing 21 corresponding to the limiting surface 222 is also a plane. Therefore, during use, the force on the limiting member 22 and the housing 21 is relatively uniform, thereby improving the service life.

[0142] like Figure 10 As shown, in this embodiment of the invention, unlike the previous embodiment, the limiting surface 222 has a plurality of receiving grooves 214. The receiving grooves 214 are used to store lubricating oil, thereby reducing the coefficient of friction between the battery pack 100 and the battery pack fixing seat 3, facilitating the installation of the battery pack 100 into the battery pack fixing seat 3, and reducing wear on the positioning components and the battery pack fixing seat 3. The lowest point of the opening of the receiving groove 214 is higher than the lowest point of the bottom of the receiving groove 214, thus effectively retaining the lubricating oil. The sidewalls of the receiving grooves 214 on the limiting surface 222 can be cylindrical or curved surfaces with a gradually decreasing diameter from the outer end to the inner end, to better retain the lubricating oil. In this embodiment, some or all of the receiving grooves 214 are circular. In this embodiment or other embodiments, the receiving grooves 214 can also be oblong grooves.

[0143] like Figure 6 , 11As shown, in this embodiment of the invention, the housing 21 includes an inner shell 215 and an outer shell 216. The inner shell 215 is detachably connected to the side mounting surface 11 and has an inner cavity 217 with one end open, the opening of which faces the outer shell 216. The outer shell 216 itself also forms a cavity for housing the inner shell 215. The outer shell 216 is detachably connected to the inner shell 215 and covers the opening of the inner cavity 217, with the outer shell 216 surrounding the side of the inner shell 215. The inner shell 215 is used for fixed installation with the side mounting surface 11, and the aforementioned limiting hole 212 is provided on the outer shell 216. By configuring the housing 21 as having a detachably connected inner shell 215 and outer shell 216, installation and processing are facilitated.

[0144] In this embodiment of the invention, the outer shell 216 and the inner shell 215 are snap-fitted together, resulting in high assembly efficiency. The outer shell 216 and the inner shell 215 can be snap-fitted together on one or more sides of the shell 21. Preferably, the outer shell 216 and the inner shell 215 are fixed on a set of oppositely arranged sides of the shell 21.

[0145] In this embodiment of the invention, the outer shell 216 has a snap-fit ​​hole 219 on its side wall, and the inner shell 215 has a snap-fit ​​block 2110 on its outer wall. The snap-fit ​​block 2110 engages with the snap-fit ​​hole 219 to fix the outer shell 216 and the inner shell 215. The snap-fit ​​block 2110 protrudes relative to the side wall of the inner shell 215. The snap-fit ​​hole 219 is a through hole or a blind hole 229. The snap-fit ​​block 2110 has a guide surface 2111, a transition surface 2112, and a snap-fit ​​surface 2113 connected in sequence. One end of the guide surface 2111 is connected to the side wall of the inner shell 215. The transition surface 2112 is parallel to the side wall of the inner shell 215. The snap-fit ​​surface 2113 is perpendicular to and connected to the side wall of the inner shell 215. During the installation of the outer shell 216 and the inner shell 215, the guide surface 2111 contacts the outer shell 216 and guides it, which is conducive to the stable assembly of the two. The transition surface 2112 contacts the outer shell 216, which helps to reduce the stress of the snap-fit ​​block 2110 on the outer shell 216 and achieve stable assembly. After the snap-fit ​​block 2110 is snapped into the snap-fit ​​hole 219, the snap-fit ​​surface 2113 and the inner wall of the snap-fit ​​hole 219 limit each other, realizing the snap-fit ​​of the inner shell 215 and the outer shell 216. The snap-fit ​​holes 219 and snap-fit ​​blocks 2110 correspond one-to-one. One or two sets of snap-fit ​​holes 219 and snap-fit ​​blocks 2110 can be provided on each of the opposite sides of the housing 21 to improve the reliability of the housing 21. In addition, the housing 21 has a long side and a short side, and the snap-fit ​​holes 219 or snap-fit ​​blocks 2110 are located on the side plate corresponding to the short side of the outer shell 216.

[0146] In this embodiment of the invention, the difference from the previous embodiment is that the snap-fit ​​block 2110 is disposed on the inner wall surface of the outer shell 216, and the snap-fit ​​hole 219 is disposed on the inner wall of the inner shell 215. The structure of the snap-fit ​​block 2110 and the relationship between the snap-fit ​​block 2110 and the snap-fit ​​hole 219 are the same as in the aforementioned embodiment, and will not be repeated here.

[0147] In this embodiment of the invention, drain holes 218 communicating with the receiving cavity 211 and the outside are correspondingly provided on the side of the outer shell 216 and the side of the inner shell 215, thereby preventing water accumulation in the receiving cavity 211. The drain holes 218 may be provided on the lower side of the outer shell 216 and the inner shell 215.

[0148] Please see Figure 11-15 Understood. In this embodiment of the invention, the outer shell 216 has a mounting surface 2114, on which the aforementioned limiting hole 212 is provided.

[0149] Figure 11 , 12 In the embodiment shown, the mounting surface 2114 is a plane, and the corresponding area of ​​the side positioning surface 31 is also a plane, so the stress on the housing 21 is relatively uniform.

[0150] like Figure 13-15 As shown, the end face of the housing 21 corresponding to the limiting surface 222, i.e., the mounting surface 2114, is provided with a receiving groove 214 facing the receiving cavity 211. This groove is used to store lubricating oil, thereby reducing the coefficient of friction between the battery pack 100 and the battery pack fixing seat 3, facilitating the installation of the battery pack 100 into the battery pack fixing seat 3, and reducing wear on the positioning components and the battery pack fixing seat 3. The receiving groove 214 is arranged around the limiting hole 212 so that the surface of the housing 21 is lubricated as much as possible. The sidewall of the receiving groove 214 on the outer shell 216 can be a smoothly transitioned curved surface, and the side of the receiving groove 214 can be a funnel-shaped structure to improve the lubrication and oil storage effects. In addition, the shape of the receiving groove 214 on the mounting surface 2114 can also be the same as the shape of the receiving groove 214 on the limiting surface 222. The limiting member 22 has a clearance groove to make way for the receiving groove 214 on the outer shell 216. The clearance groove can be set at the corner of the base 227. By setting a clearance groove, the depth of the receiving groove 214 can be appropriately increased to improve the oil storage effect and make the overall structure of the positioning component 2 more compact. It should be noted that in these embodiments, the receiving groove 214 is provided on the mounting surface 2114. In other embodiments, the receiving groove 214 can be provided on both the mounting surface 2114 and the limiting surface 222, or the receiving groove 214 can be provided only on the limiting surface 222.

[0151] like Figure 13-15As shown in this embodiment of the invention, the end face of the housing 21 corresponding to the limiting surface 222 has a housing mounting surface 2115, specifically, the housing mounting surface 2115 is disposed on the mounting surface 2114. The housing mounting surface 2115 is used to abut against and contact the side positioning surface 31 to ensure a stable connection between the two. The receiving groove 214 on the housing 216 can be disposed on the housing mounting surface 2115. The mounting surface 2114 has a housing groove 2116 recessed towards the receiving cavity 211 at a position avoiding the housing mounting surface 2115. The housing groove 2116 can also be understood as being disposed between two adjacent housing mounting surfaces 2115, or between two adjacent receiving grooves 214. By providing the housing groove 2116, the rigidity of the housing 216 is improved, and the shape is enhanced.

[0152] In one embodiment, four housing mounting surfaces 2115 are located at the corners near the limiting hole 212, and a housing groove 2116 is provided between two adjacent housing mounting surfaces 2115, with the two sides of the housing groove 2116 extending to the edges of the limiting hole 212 and the housing 216, respectively.

[0153] like Figure 11 , 13 As shown in Figure 14, in this embodiment of the invention, the outer shell 216 provided on the housing 21 has an outer shell guide surface 2117. The outer shell guide surface 2117 gradually extends from the end of the housing 21 toward the limiting surface 222. Alternatively, it can be understood that the outer shell guide surface 2117 gradually extends from the end of the housing 21 toward the mounting surface 2114 and gradually moves away from the side mounting surface 11. When the battery pack body 1 is installed on the battery mounting base 3, the side positioning surface 31 and the outer shell guide surface 2117 contact and press against each other. The outer shell guide surface 2117 guides the outer shell 216 to a position corresponding to the side positioning surface 31 and guides the limiting guide surface 226 onto the side positioning surface 31. The angle of inclination of the outer shell guide surface 2117 relative to the limiting surface 222 is less than 45°, which facilitates the stable installation of the battery pack 100 and the battery mounting base 3.

[0154] like Figure 14-15 As shown, in this embodiment of the invention, the outer shell 216 has a notch 2118 at one end away from the limiting surface 222, and each notch 2118 is distributed at any one or more of the four corners of the outer shell 216; by setting notches 2118 at the corners of the outer shell 216, the rigidity of the outer shell 216 is improved, and the stamping stacking and cracking can be prevented in the molding process.

[0155] like Figure 11 , 13 As shown in Figures 1 and 14, in this embodiment of the invention, the outer shell guide surface 2117 is connected to the three sides of the outer shell 216 and the mounting surface 2114 of the outer shell 216.

[0156] like Figure 12 , 15 As shown, in this embodiment of the invention, the outer casing 216 has a first main board 2119 and a first surrounding plate 2120, which surrounds the outer casing. One end of the first surrounding plate 2120 is fixed to the outer casing of the first main board 2119, thus forming a generally square structure. A small arc-shaped or planar transition surface 2112 is provided at the connection between one side of the first surrounding plate 2120 and the first main board 2119, so that it can guide the side positioning surface 31 during the installation of the battery pack 100 and the battery fixing seat 3, avoiding jamming. In addition, in this embodiment, the mounting surface 2114, the limiting hole 212, and the outer casing mounting surface 2115 are provided on the first main board 2119, and the notch 2118 is located on the end of the first surrounding plate 2120 away from the first main board 2119.

[0157] Please see Figure 16-25 To understand this, in this embodiment of the invention, the inner shell 215 has the aforementioned limiting protrusion 213 recessed toward the inner cavity 217 in the middle, and the elastic mechanism 23 is inserted into or sleeved on the limiting protrusion 213; furthermore, the limiting protrusion 213 can be convex or annular; by setting the limiting protrusion 213, the elastic mechanism 23 is precisely positioned and stably guided.

[0158] In this embodiment of the invention, the inner shell 215 has a plurality of threaded posts 2121 protruding toward the inner cavity 217. The center of each threaded post 2121 is a through hole with internal threads. The battery pack body 1 is connected to the positioning component 2 by fasteners. The fasteners pass through the threaded posts 2121 from one side of the battery pack body 1 and are threadedly connected to them. The threaded posts 2121 are integrally formed with the other parts of the inner shell 215. By providing threaded posts 2121 on the side of the inner shell 215 facing the inner cavity 217 to achieve the connection between the positioning component 2 and the battery pack body 1, the surface of the inner shell 215 can directly fit against the side mounting surface 11, thereby improving the stability and reliability of the connection between the positioning component 2 and the battery pack body 1, and also improving the compactness of the positioning component 2 structure.

[0159] In this embodiment of the invention, the surface of the inner shell 215 has a plurality of inner shell mounting surfaces 2122 for detachable connection with the side mounting surface 11; the threaded post 2121 is disposed on the inner shell mounting surface 2122. The inner shell mounting surface 2122 fits against the side mounting surface 11, thereby making the positioning component 2 and the battery pack body 1 stably connected. An inner shell groove 2123 is provided on the inner shell 215 in an area avoiding the inner shell mounting surface 2122, which is recessed toward the inner cavity 217. The inner shell groove 2123 is provided to improve the rigidity of the inner shell 215 and enhance the shape of the inner shell 215. In this embodiment, the inner shell groove 2123 can be cross-shaped, with each of the four corners of the inner shell groove 2123 corresponding to an inner shell mounting surface 2122, and the limiting protrusion 213 located at the center of the intersection.

[0160] like Figure 22-23 In the illustrated embodiment, the inner shell 215 has a notch 2118 at one end near the limiting surface 222. The notches 2118 are distributed at the corners of the inner shell 215, and can be provided at any one or more corners. The notch 2118 at the upper end of the inner shell 215 makes way for the outer shell guide surface 2117; correspondingly, the thickness of the outer shell 216 at the outer shell guide surface 2117 gradually decreases. Providing notches 2118 at the corners of the inner shell 215 also prevents stamping stacking and cracking during the molding process.

[0161] like Figure 23-25 In the illustrated embodiment, the inner shell 215 has a second main board 2124 and a second surrounding plate 2125. The second surrounding plate 2125 surrounds the inner shell. The first end of the second surrounding plate 2125 is fixed to the edge of the second main board 2124, thereby forming the aforementioned inner cavity 217.

[0162] Individual positioning components 2 may emphasize different functions. For example, some positioning components 2 may emphasize guiding functions, while others may emphasize limiting functions. The structures of positioning components 2 with different emphasizing functions may vary slightly. Based on the foregoing, the positioning components 2 emphasizing guiding functions and those emphasizing limiting functions will be described separately below. For ease of distinction, the positioning component 2 emphasizing guiding functions is defined as the battery pack guiding and limiting device 2126, and the other type is defined as the limiting device used for the battery pack 100.

[0163] The following combination Figure 11 and Figure 16-21 First, the guide and limit device 2126 for the battery pack will be described.

[0164] The upper end of the battery pack guide limiting device 2126 is higher than the side mounting surface 11. Its height above the side mounting surface 11 is greater than the projected length of the outer shell guide surface 2117 on the housing 21. The upper end of the outer shell guide surface 2117 is higher than the side mounting surface 11. In this embodiment, its height above the side mounting surface 11 is more than 15mm to improve the guiding and positioning effect. The inner shell 215 has a bevel on its side. Figure 16-21 Not obvious, please refer to Figure 11 (Understanding) is used to make way for the outer casing guide surface 2117, so that the upper end of the battery pack guide limiting device 2126 has a gradually narrowing shape.

[0165] The inner shell 215 has the aforementioned inner shell mounting surface 2122 and inclined transition surface 2128. The inner shell mounting surface 2122 is used to connect to the side mounting surface 11. One end of the inner shell 215 corresponding to the outer shell guide surface 2117 is recessed towards the inner cavity 217 and is connected to the inner shell mounting surface 2122 via the inclined transition surface 2128. The inclined direction of the inclined transition surface 2128 is opposite to the inclined direction of the outer shell guide surface 2117. By setting the inclined transition surface 2128, the upper end of the inner shell 215 is recessed towards the side positioning surface 31, thereby allowing space for related components on the battery pack body 1 and enhancing the deformation resistance of the inner shell 215.

[0166] The relative positional relationship between the positioning component 2 and the battery pack body 1 will affect their effectiveness and function. In the initial stage of installing the battery pack body 1 onto the battery mounting base 3, the guiding function is particularly important. Therefore, by setting guide limiting devices 2126 for the battery pack at both ends of the battery pack body 1, which emphasize the guiding function, a stable fixation between the battery pack body 1 and the battery mounting base 3 can be achieved.

[0167] like Figure 3 In the illustrated embodiment, two battery pack guide and limiting devices 2126 are fixed along the length of each side mounting surface 11, and the two battery pack guide and limiting devices 2126 are located at both ends of the side mounting surface 11. In other embodiments, as an alternative means, one battery pack guide and limiting device 2126 located in the middle is fixed along the length of the side mounting surface 11. As another alternative means, multiple battery pack guide and limiting devices 2126 located in the middle are fixed along the length of the side mounting surface 11. As yet another alternative means, positioning components 2 are arranged at both ends and the middle of the side mounting surface 11, and all positioning components 2 are battery pack guide and limiting devices 2126.

[0168] The following combination Figure 22-25 The limiting device used for the battery pack 100 is described.

[0169] In the limiting device for the battery pack 100: the outer shell 216 has a first main plate 2119 and a first surrounding plate 2120, and the inner shell 215 has a second main plate 2124 and a second surrounding plate 2125. One end of the first surrounding plate 2120 is fixed and surrounds the edge of the first main plate 2119. The first surrounding plate 2120 is perpendicular to the first main plate 2119. The first main plate 2119 is a flat plate or a plate with a groove recessed toward the receiving cavity 211. The limiting hole 212 is located on the first main plate 2119. The outer shell 216 is generally square, and the inner shell 215 is generally square. The inner shell 215 and the outer shell 216 cover each other to form a square shell 21. That is, the thickness of the limiting device for the battery pack 100 is relatively uniform around its perimeter, so the outer shell 216 can withstand greater strength and thus has stronger positioning performance.

[0170] In application, the upper end of the limiting device for the battery pack 100 is not higher than the side mounting surface 11. The positioning component 2 in the middle of the side positioning surface 31 can be set as the limiting device for the battery pack 100, or all positioning components 2 can be set as limiting devices for the battery pack 100.

[0171] The guide and limiting device 2126 for the battery pack and the limiting device for the battery pack 100 can be used in combination. For example... Figure 3 In the embodiment shown, battery pack guide and limiting devices 2126 are provided at both ends of the side positioning surface 31 to improve the stability of the battery pack 100 during installation. One or more limiting devices for the battery pack 100 are provided in the middle of the side positioning surface 31 to improve the fixing effect between the installed battery pack 100 and the battery fixing seat 3.

[0172] This invention also provides a limiting member, the structure of which is the same as the limiting member 22 in any of the above embodiments.

[0173] The first end of the limiting member 22 provided in this embodiment of the invention (i.e., the end that abuts against the side positioning surface 31) has a limiting surface 222, on which a receiving groove 214 for storing lubricating medium is provided. The structure of the receiving groove 214 can be the same as that in any of the above embodiments, and will not be described again here. The receiving groove 214 is used to store lubricating oil, so as to reduce the coefficient of friction between the battery pack 100 and the battery pack fixing seat 3, facilitate the installation of the battery pack 100 in the battery pack fixing seat 3, and reduce the wear of the positioning component and the battery pack fixing seat 3.

[0174] This invention also provides a battery pack assembly 1000, which directly uses the limiting member 22 in the aforementioned two embodiments to guide and limit the battery pack body 1 and the battery fixing seat 3. In other words, the positioning component can be directly implemented through the limiting member 22. During assembly, the limiting member 22 is first fixed on the side mounting surface 11 of the battery pack body 1 to form the battery pack 100. The battery pack 100 gradually moves upward from below. During this process, the limiting member 22 gradually comes into contact with the side positioning surface. The limiting guide surface 226 and the side positioning surface 31 achieve a mutual guiding effect, and the limiting surface 222 and the side positioning surface 31 achieve a mutual abutment effect.

[0175] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A guiding and limiting device for a battery pack, characterized in that, The application relates to a guiding and limiting device for a battery pack. The device comprises a shell with a containing cavity and a limiting hole; an elastic mechanism and a limiting piece are arranged in the containing cavity, and the limiting piece is provided with a protruding part penetrating and protruding from the limiting hole on the side opposite to the elastic mechanism; the elastic mechanism is pressed into the containing cavity by the limiting piece and the shell, and the limiting piece and the shell are connected by the elastic mechanism in a floating mode; the elastic mechanism comprises a spring sheet, and the two ends of the spring sheet are respectively abutted against the limiting piece and the shell; the elastic mechanism has one spring sheet or a plurality of interval distributed spring sheets; the elastic mechanism comprises an elastic rubber block, and the two ends of the elastic rubber block are respectively abutted against the limiting piece and the shell; or the elastic mechanism comprises an elastic piece, and the elastic piece is any one or more of a spiral spring, a disc spring and a tower spring; the shell comprises an inner shell with an open inner cavity at one end and an outer shell with an outer shell guiding surface and the limiting hole; the outer shell covers the inner cavity and is detachably connected with the inner shell; the limiting hole is matched with the shape of the protruding part, and the periphery of the protruding part is abutted against the inner wall surface of the limiting hole or is provided with a gap of 0.5-5 mm; the protruding end of the protruding part of the limiting piece is provided with a limiting surface, and the protruding part is further provided with a limiting guiding surface inclined from the top of the protruding part to the limiting surface; the limiting hole is arranged on the mounting surface of the shell, and the shell is further provided with an outer shell guiding surface gradually extending from one end of the shell to the mounting surface and inclined relative to the mounting surface.

2. The guiding and limiting device for the battery pack according to claim 1, wherein the limiting piece is provided with a limiting protrusion for limiting the radial direction of the elastic mechanism, and the elastic mechanism is sleeved or inserted in the limiting protrusion; and / or the limiting piece is provided with a limiting ring, and the elastic mechanism is sleeved or inserted in the limiting ring; and / or the limiting piece is provided with a limiting groove, and the elastic mechanism is clamped in the limiting groove. The side of the limiting piece facing the elastic mechanism is provided with a limiting matching part, which is one or more of a limiting protrusion, a limiting ring or a limiting groove. The side of the limiting piece provided with the limiting matching part is provided with a plurality of recessed parts, and a strip-shaped rib is arranged between the plurality of recessed parts. The limiting matching part is a ring-shaped rib, the elastic mechanism is inserted or sleeved in the ring-shaped rib, and a plurality of blind holes are arranged in the ring-shaped rib. The radius of the blind hole gradually decreases from the center of the ring-shaped rib to the outside. The strip-shaped rib connects the ring-shaped rib and the side wall of the recessed part.

8. The guiding and limiting device for the battery pack according to claim 1, wherein a clamping hole is arranged on the side wall of the outer shell, and a clamping block is arranged on the outer side wall of the inner shell; the clamping block is sequentially connected with a guiding surface, a transition surface and a clamping surface; the first end of the guiding surface is connected with the side wall of the inner shell, the transition surface is parallel to the side wall of the inner shell, and the clamping surface is perpendicular to the side wall of the inner shell and is connected with the side wall. ​ ​ ​ ​ ​ ​ ​ ​ ​ 3. The guiding and limiting device for battery pack according to claim 1, wherein, ​ 4. The guiding and limiting device for battery pack according to claim 3, characterized in that, ​ 5. The guiding and limiting device for battery pack according to claim 4, wherein, ​ 6. The guiding and limiting device for battery pack according to claim 5, wherein, ​ 7. The guiding and limiting device for battery pack according to claim 5, wherein, ​ ​ ​ Or, the inner side wall of the shell is provided with a clamping block, and the side wall of the inner shell is provided with a clamping hole, and the clamping block is clamped in the clamping hole. 9.The guiding and limiting device for battery pack according to claim 1, characterized in that, the outer shell guiding surface is connected with three side surfaces of the outer shell and an end surface of the outer shell; and / or, the inclination angle of the outer shell guiding surface relative to the limiting surface of the end of the protrusion is less than 45°; and / or, the outer shell and the inner shell are both provided with a drainage hole communicating with the accommodating cavity and the outside, and the drainage hole is located at an end opposite to the outer shell guiding surface; and / or, the middle part of the inner shell has a limiting protrusion recessed towards the inner cavity for radially limiting the elastic mechanism; and / or, the inner shell has a plurality of threaded columns protruding towards the inner cavity, and the threaded columns have threaded holes which are through holes; and / or, the inner shell has a plurality of inner shell mounting surfaces, and the area of the inner shell avoiding the inner shell mounting surfaces is provided with an inner shell groove recessed towards the inner cavity; and / or, the end of the inner shell corresponding to the outer shell guiding surface has an outer shell groove recessed towards the outer shell; and / or, the inner shell has an inclined transition surface, and the end of the inner shell corresponding to the outer shell guiding surface is recessed towards the inner cavity and is connected with the inner shell mounting surface through the inclined transition surface; and / or, the side part of the inner shell is beveled for giving way to the outer shell guiding surface.

10. A battery pack, characterized by, The battery pack assembly comprises a battery pack body and the guiding and limiting device for battery pack according to any one of claims 1-9, and the battery pack body has a side mounting surface, and the guiding and limiting device for battery pack is mounted on the side mounting surface. 11.The battery pack according to claim 10, wherein the height of the guiding and limiting device for battery pack above the side mounting surface of the battery pack body is greater than the projection length of the outer shell guiding surface on the shell.

12. A battery pack assembly, comprising: The battery pack assembly comprises a battery pack and a battery fixing seat, and the shell has an outer shell guiding surface, and the end of the shell opposite to the limiting hole is detachably connected with the battery pack; when the battery pack is mounted on the battery fixing seat, the battery fixing seat is guided to the limiting member through the outer shell guiding surface on the shell and abuts against the limiting member.

13. An electric vehicle, characterized by The battery pack assembly comprises the battery pack according to claim 12. The battery pack assembly comprises the battery pack according to claim 12.

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