Lateral battery pack bottom support assembly

Abstract

The utility model relates to the technical field of electric vehicle battery packs. A lateral battery pack collet assembly comprises a battery bottom bracket, the battery bottom bracket comprises at least three supporting rods arranged in parallel, the two ends of the supporting rods in the length direction are connected with sub-brackets arranged on the opposite sides of mirror images, and each sub-bracket comprises an inner supporting leg and an outer supporting leg which are arranged inside and outside; one side, far away from the supporting rod, of the external supporting leg is opened; the external supporting leg comprises a primary guide plate for longitudinally guiding the battery box and a bottom supporting structure for supporting the bottom of the battery box; the internal supporting leg comprises a bottom bracket, a secondary guide piece for longitudinally guiding the battery box, a tertiary guide pin matched with a positioning hole in the battery box, a power connection seat matched with an electric connector on the battery box, and a locking mechanism rotationally clamped with a rotary positioning groove of the battery box. According to the utility model, multi-stage guiding and positioning of battery box loading are realized, and relative locking of the battery box and the battery bottom bracket is conveniently realized through the locking mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle battery packs, in particular to a battery pack bottom support assembly. Background Art

[0002] As people's environmental awareness increases, electric vehicles are becoming more and more popular as new energy green transportation tools. Since electric vehicles use on-board batteries to power electric motors to output power, they have significant effects in energy saving and environmental protection.

[0003] In order to achieve functions such as a longer driving range, a battery box needs to be installed on the electric vehicle. The battery box includes a battery pack frame and multiple battery packs located within the battery pack frame. The battery pack frame of the battery box is fixedly installed on the battery pack bottom bracket installed on the electric vehicle.

[0004] The stability of the mounting structure of the battery pack frame and the battery bottom bracket can effectively prevent loosening during vehicle driving. Therefore, how to achieve rapid locking and unlocking of the battery pack frame and the battery bottom bracket, and how to achieve the installation positioning accuracy of the battery pack frame are the directions for continuous improvement of the battery pack bottom bracket assembly. Utility Model Content

[0005] In response to the problems existing in the prior art, the present invention provides a lateral battery pack base assembly, which solves at least one of the above technical problems.

[0006] The technical solution of the utility model is: a lateral battery pack bottom bracket assembly, comprising a battery bottom bracket, characterized in that the battery bottom bracket comprises at least three parallel support rods, both ends of the support rods in the length direction are connected to sub-brackets arranged on the opposite side in a mirror image, and the sub-bracket comprises inner support legs and outer support legs arranged inside and outside;

[0007] The outer support leg is open at one side away from the support rod, and the outer support leg includes a primary guide plate for longitudinally guiding the battery box and a bottom support structure for supporting the bottom of the battery box, and the bottom support structure is fixedly connected to the inner side of the primary guide plate;

[0008] The internal support leg includes a bottom bracket, a secondary guide member for longitudinally guiding the battery box, a tertiary guide pin adapted to the positioning hole on the battery box, a power socket adapted to the electrical connector on the battery box, and a locking mechanism rotatably engaged with the rotational positioning groove of the battery box. The locking mechanism, the power socket, the tertiary guide pin and the secondary guide member are all installed on the bottom bracket.

[0009] The utility model optimizes the structure of the battery bottom bracket to facilitate multi-level guiding and positioning of the battery box, thereby ensuring the alignment accuracy between the plug socket and the battery box. At the same time, the locking mechanism facilitates relative locking of the battery box and the battery bottom bracket.

[0010] Further preferably, the internal supporting legs include vertically arranged bottom support connecting plates, and adjacent bottom support connecting plates and the bottom support connecting plates and adjacent primary guide plates are connected via reinforcing connecting plates.

[0011] Further preferably, the locking mechanism comprises a locking tongue fixing seat, a locking member and a telescopic cylinder for driving the locking member to rotate, and the locking tongue fixing seat is detachably mounted on the bottom bracket;

[0012] The top of the locking member is provided with a locking tongue which is rotatably engaged with the rotation positioning groove of the battery box;

[0013] The locking member is rotatably connected to the lock tongue fixing seat, and the telescopic rod of the telescopic cylinder drives the locking member to rotate through a transmission mechanism.

[0014] Further preferably, the locking mechanism further comprises a connecting rod for linking the two locking members to move synchronously;

[0015] The connecting rod is connected to one end of a transmission swing arm through a fisheye bearing, and the other end of the transmission swing arm is transmission-connected to the telescopic rod of the telescopic cylinder through a fisheye bearing;

[0016] The center of the transmission swing arm is transmission-connected to the locking member.

[0017] Further preferably, the locking mechanism further comprises a rotationally fixed limiting block, on which a positioning pin is fixed; and the lock tongue fixing seat is provided with an arc-shaped limiting groove for movement of the positioning pin;

[0018] The rotation fixed limit block is connected to the locking member via a key and keyway structure that match each other;

[0019] A slotted nut is threadedly connected to the locking member, and a notch of the slotted nut passes through a locking screw that locks the slotted nut and the locking member;

[0020] The rotation fixing limit block is located between the slotted nut and the lock tongue fixing seat.

[0021] It is convenient to limit the movement trajectory of the lock tongue.

[0022] Further preferably, the length direction of the support rod is the left-right direction;

[0023] The locking parts of the locking mechanism are installed on the left and right sides of the three-stage guide pin;

[0024] The lock tongue is in the shape of a mushroom head which is narrow at the top and wide at the bottom, and opposite sides of the lock tongue are provided with mutually parallel cross sections.

[0025] It has two-in-one functions of positioning and guiding.

[0026] Further preferably, an elastic buffer downward pressure structure is installed on the top of the battery box, and the upper end of the elastic buffer downward pressure structure is used to support the cargo box.

[0027] Further preferably, the elastic buffer pressing structure includes a pressing buffer pad, a connecting plate, a bolt, a spring, a locking nut, an upper limit seat and a lower limit seat;

[0028] The bolts pass through both ends of the connecting plate and are threadedly connected to the upper limit seat, and the center of the connecting plate is detachably connected to the downward pressure buffer pad;

[0029] The spring is sleeved on the bolt, the upper end of the spring is sleeved on the periphery of the upper limit seat, and the lower end of the spring is sleeved on the periphery of the lower limit seat;

[0030] The bottom of the bolt is threadedly connected with a locking nut;

[0031] A support frame is provided on the top of the battery box. An opening for longitudinally slidingly connecting the bolt is opened on the support frame. The lower limit seat and the locking nut are located on the upper and lower sides of the support frame.

[0032] Further preferably, the bottom support structure includes a support bar, a load-bearing block and a buffer pad fixedly connected to the primary guide plate, and the support bar is fixed with the load-bearing blocks and buffer pads spaced apart along the length direction of the support bar.

[0033] Further preferably, the primary guide plate includes a vertically arranged support plate and a guide structure fixed on the inner side of the support plate;

[0034] The guide structure includes a vertically arranged guide column and a horizontally arranged limit bar, and the thickness of the guide column increases from top to bottom to match the thickness of the limit bar;

[0035] A first-level positioning block of the battery pack is fixed to the outside of the battery box, and the first-level positioning block of the battery pack is used to abut against the limiting bar.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] The utility model optimizes the structure of the battery bottom bracket to facilitate multi-level guiding and positioning of the battery box, thereby ensuring the alignment accuracy between the plug socket and the battery box. At the same time, the locking mechanism facilitates relative locking of the battery box and the battery bottom bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A structural diagram of the utility model;

[0039] Figure 2 This is a front view of the utility model;

[0040] Figure 3 This is a structural diagram of the battery box of the utility model;

[0041] Figure 4 This is a structural schematic diagram of the battery bottom bracket of the utility model;

[0042] Figure 5 This is a structural diagram of the elastic buffer downward pressure structure of the utility model;

[0043] Figure 6 It is a partial structural diagram of the locking mechanism of the utility model;

[0044] Figure 7 This is a schematic diagram of the partial structure of the locking mechanism of the utility model;

[0045] Figure 8 This is a structural diagram of the locking mechanism of the utility model in the locked state and the unlocked state.

[0046] Reference numerals: 1 is a support rod, 2 is an external support leg, 3 is an internal support leg, 4 is a battery box, 5 is an elastic buffer pressing structure, and 6 is a locking mechanism;

[0047] 201 is the first-level guide plate, 202 is the load-bearing block, 203 is the buffer pad, 301 is the second-level guide, 302 is the third-level guide pin, 303 is the power socket, 304 is the bottom support connecting plate, 305 is the reinforcement connecting plate, 401 is the first-level positioning block of the battery pack, 402 is the expansion kettle protective shell, 403 is the battery pack drainage plate, 404 is the rotation lock positioning groove, 405 is the positioning hole, 406 is the second-level positioning block of the battery pack, 407 is the positioning pin of the battery replacement robot, 408 It is the positioning slot of the battery-exchanging robot, 501 is the downward pressure buffer pad, 502 is the connecting plate, 503 is the upper limit seat, 504 is the spring, 505 is the lower limit seat, 506 is the locking nut, 507 is the cotter pin, 508 is the bolt, 601 is the locking part, 602 is the lock tongue fixing seat, 603 is the rotation fixed limit block, 604 is the fisheye bearing, 605 is the connecting part, 606 is the telescopic cylinder, 607 is the connecting rod, 608 is the transmission swing arm, and 609 is the slotted nut. DETAILED DESCRIPTION

[0048] See also Figures 1 to 8, Specific embodiment 1, a lateral battery pack bottom support assembly, including a battery bottom support frame, the battery bottom support frame includes at least three parallel support rods 1, both ends of the support rod 1 in the length direction are connected to sub-brackets arranged on the opposite side of the mirror image, the sub-bracket includes internal support legs 3 and external support legs 2 arranged inside and outside; the external support leg 2 is open on one side away from the support rod 1, the external support leg 2 includes a primary guide plate 201 for longitudinally guiding the battery box 4 and a bottom support structure for supporting the bottom of the battery box 4, the inner side of the primary guide plate 201 is fixedly connected to the bottom support structure; the internal support leg 3 includes a bottom bracket, a secondary guide member 301 for longitudinally guiding the battery box 4, a tertiary guide pin 302 adapted to the positioning hole 405 on the battery box 4, a power socket 303 adapted to the electrical connector on the battery box 4 and a locking mechanism 6 rotatably engaged with the rotation positioning groove of the battery box 4, the locking mechanism 6, the power socket 303, the tertiary guide pin 302 and the secondary guide member 301 are all installed on the bottom bracket. The utility model optimizes the structure of the battery bottom bracket to facilitate multi-level guiding and positioning of the battery box 4, thereby ensuring the alignment accuracy between the socket and the battery box 4. At the same time, the locking mechanism 6 facilitates the relative locking of the battery box 4 and the battery bottom bracket.

[0049] See also Figure 3 The battery box includes a primary positioning block 401 for the battery pack, which contacts the primary guide plate 201. Primary positioning of the battery pack is limited to 0-15 mm in the X direction (the direction of vehicle travel). The battery box also includes a secondary positioning block 406 for the battery pack, which contacts the secondary guide 301. The battery pack is positioned at the second level in the X and Y directions (within the vehicle's travel and vehicle width directions of 0-10m). A positioning hole 405 is provided at the bottom of the battery box, and the positioning limit in the X and Y directions is achieved within 0-2mm through the positioning hole 405 and the third-level guide pin 302. The power socket 303 is contacted and energized, and finally the battery box 4 is fixed to the internal support leg 3 through the rotation lock positioning groove 404 and the locking mechanism 6 rotation lock; the battery box is provided with a battery swap robot positioning pin 407 and a battery swap robot positioning groove 408. The purpose is to position the battery swap robot and the battery box 4. The battery box is provided with an expansion kettle protective shell 402 and a battery pack drainage plate 403.

[0050] The inner supporting legs 3 include vertically arranged bottom supporting connecting plates 304 , and adjacent bottom supporting connecting plates 304 and bottom supporting connecting plates 304 and adjacent primary guide plates 201 are connected via reinforcing connecting plates 305 .

[0051] The locking mechanism 6 includes a bolt holder 602, a locking element 601, and a telescopic cylinder 606 that drives the locking element 601. The bolt holder 602 is removably mounted on the bottom bracket. A bolt is provided at the top of the locking element 601, which rotatably engages a rotational positioning slot in the battery compartment 4. The locking element 601 is rotatably connected to the bolt holder 602, and the telescopic rod of the telescopic cylinder 606 drives the locking element 601 through a transmission mechanism. The locking mechanism 6 also includes a connecting rod 607 for synchronously linking the two locking elements 601. The connecting rod 607 is connected to one end of a transmission swing arm 608 via a fisheye bearing 604. The other end of the transmission swing arm 608 is transmission-connected to the telescopic rod of the telescopic cylinder 606 via the fisheye bearing 604. The center of the transmission swing arm 608 is transmission-connected to the locking element 601. The telescopic cylinder is connected to the transmission swing arm connected to one locking element. The transmission swing arm of the other locking element is not connected to the telescopic cylinder. The telescopic cylinder is a pneumatic cylinder. The telescopic rod of the telescopic cylinder 606 is in transmission connection with the fisheye bearing 604 via a connector 605. The locking mechanism 6 also includes a rotationally fixed stopper 603, to which a positioning pin is fixed. The lock tongue holder 602 is provided with an arcuate limiting groove for the positioning pin. The rotationally fixed stopper 603 is connected to the locking member 601 via a matching key and keyway structure. A slotted nut 609 is threadedly connected to the locking member 601, and the notch of the slotted nut 609 passes through the locking screw that secures the slotted nut 609 to the locking member 601. The rotationally fixed stopper 603 is located between the slotted nut 609 and the lock tongue holder 602, thus limiting the movement trajectory of the lock tongue.

[0052] The left-right direction is defined by the length of the support rod 1. Locking members of the locking mechanism 6 are mounted on both sides of the three-stage guide pin 302. The locking tongue is mushroom-shaped, narrow at the top and wide at the bottom, with parallel cross-sections on opposite sides. This provides both positioning and guiding capabilities. The opening of the rotational positioning slot is larger than the outer dimensions of the locking tongue. After passing through the rotational positioning slot, the locking tongue rotates 90° to lock and secure. To unlock, it rotates 90° in the opposite direction, facilitating the disengagement of the locking tongue from the rotational positioning slot.

[0053] An elastic, buffering, downward-pressing structure 5 is mounted on the top of the battery box 4. The upper end of the elastic, buffering, downward-pressing structure 5 is used to support the cargo box. This structure includes a downward-pressing cushion 501, a connecting plate 502, a bolt 508, a spring 504, a locking nut 506, an upper limit seat 503, and a lower limit seat 505. Bolt 508 passes through both ends of the connecting plate 502 and is threadedly connected to the upper limit seat 503. The center of the connecting plate 502 is detachably connected to the downward-pressing cushion 501. A spring 504 is mounted on the bolt 508, with the upper end of the spring 504 fitting around the periphery of the upper limit seat 503 and the lower end of the spring 504 fitting around the periphery of the lower limit seat 505. A locking nut 506 is threadedly connected to the bottom of the bolt 508. A cotter pin 507 secures the bolt 508 and the locking nut 506 relative to each other. A support frame is provided on the top of the battery box 4. The support frame is provided with openings for longitudinal sliding connection bolts 508. The lower limit seat 505 and the locking nut 506 are located on the upper and lower sides of the support frame.

[0054] The bottom support structure includes a support bar, a load-bearing block 202 and a buffer pad 203 fixedly connected to the primary guide plate 201. The support bar is fixed with load-bearing blocks 202 and buffer pads 203 spaced apart along the length direction of the support bar.

[0055] The primary guide plate 201 comprises a vertical support plate and a guide structure fixed to its inner side. The guide structure comprises vertical guide posts and horizontal limit bars, with the thickness of the guide posts increasing from top to bottom to match the thickness of the limit bars. A battery pack primary positioning block 401 is fixed to the outside of the battery box 4, which abuts against the limit bars. Two primary guide plates are provided, one in front of the other. The bottom of the battery pack primary positioning block 401 is provided with a guide slope arranged from the outside to the inside.

[0056] The secondary guide member includes a pyramid-shaped structure and a rectangular support column arranged above and below. There are four secondary guide members.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A side-mounted battery pack bottom bracket assembly, comprising a battery bottom bracket, characterized in that: The battery bottom bracket includes at least three parallel support rods, both ends of the support rods in the length direction are connected to sub-brackets arranged on the opposite side of the mirror image, and the sub-bracket includes internal support legs and external support legs arranged inside and outside; The outer support leg is open at one side away from the support rod, and the outer support leg includes a primary guide plate for longitudinally guiding the battery box and a bottom support structure for supporting the bottom of the battery box, and the bottom support structure is fixedly connected to the inner side of the primary guide plate; The internal support leg includes a bottom bracket, a secondary guide member for longitudinally guiding the battery box, a tertiary guide pin adapted to the positioning hole on the battery box, a power socket adapted to the electrical connector on the battery box, and a locking mechanism rotatably engaged with the rotational positioning groove of the battery box. The locking mechanism, the power socket, the tertiary guide pin and the secondary guide member are all installed on the bottom bracket.

2. The side-mounted battery pack base assembly according to claim 1, characterized in that: The internal supporting legs include vertically arranged bottom support connecting plates, and adjacent bottom support connecting plates and the bottom support connecting plates and adjacent primary guide plates are connected via reinforcing connecting plates.

3. The side-mounted battery pack base assembly according to claim 1, characterized in that: The locking mechanism includes a locking tongue fixing seat, a locking member, and a telescopic cylinder for driving the locking member to rotate, and the locking tongue fixing seat is detachably mounted on the bottom bracket; The top of the locking member is provided with a locking tongue which is rotatably engaged with the rotation positioning groove of the battery box; The locking member is rotatably connected to the lock tongue fixing seat, and the telescopic rod of the telescopic cylinder drives the locking member to rotate through a transmission mechanism.

4. The side-mounted battery pack base assembly according to claim 3, characterized in that: The locking mechanism further includes a connecting rod for linking the two locking members to move synchronously; The connecting rod is connected to one end of a transmission swing arm through a fisheye bearing, and the other end of the transmission swing arm is transmission-connected to the telescopic rod of the telescopic cylinder through a fisheye bearing; The center of the transmission swing arm is transmission-connected to the locking member.

5. The side-mounted battery pack base assembly according to claim 4, characterized in that: The locking mechanism further comprises a rotationally fixed limiting block, on which a positioning pin is fixed; the locking tongue fixing seat is provided with an arc-shaped limiting groove for movement of the positioning pin; The rotation fixed limit block is connected to the locking member via a key and keyway structure that match each other; A slotted nut is threadedly connected to the locking member, and a notch of the slotted nut passes through a locking screw that locks the slotted nut and the locking member; The rotation fixing limit block is located between the slotted nut and the lock tongue fixing seat.

6. The side-mounted battery pack base assembly according to claim 4, characterized in that: The length direction of the support rod is the left-right direction; The locking parts of the locking mechanism are installed on the left and right sides of the three-stage guide pin; The lock tongue is in the shape of a mushroom head which is narrow at the top and wide at the bottom, and opposite sides of the lock tongue are provided with mutually parallel cross sections.

7. The side-mounted battery pack base assembly according to claim 1, characterized in that: An elastic buffer downward pressure structure is installed on the top of the battery box, and the upper end of the elastic buffer downward pressure structure is used to support the cargo box.

8. The side-mounted battery pack base assembly according to claim 7, characterized in that: The elastic buffer pressing structure includes a pressing buffer pad, a connecting plate, a bolt, a spring, a locking nut, an upper limit seat and a lower limit seat; The bolts pass through both ends of the connecting plate and are threadedly connected to the upper limit seat, and the center of the connecting plate is detachably connected to the downward pressure buffer pad; The spring is sleeved on the bolt, the upper end of the spring is sleeved on the periphery of the upper limit seat, and the lower end of the spring is sleeved on the periphery of the lower limit seat; The bottom of the bolt is threadedly connected with a locking nut; A support frame is provided on the top of the battery box. An opening for longitudinally slidingly connecting the bolt is opened on the support frame. The lower limit seat and the locking nut are located on the upper and lower sides of the support frame.

9. The side-mounted battery pack base assembly according to claim 1, characterized in that: The bottom support structure includes a support bar, a load-bearing block and a buffer pad fixedly connected to the primary guide plate, and the load-bearing blocks and the buffer pad are fixed on the support bar and are spaced apart along the length direction of the support bar.

10. The side-mounted battery pack base assembly according to claim 1, characterized in that: The first-level guide plate includes a vertically arranged support plate and a guide structure fixed on the inner side of the support plate; The guide structure includes a vertically arranged guide column and a horizontally arranged limit bar, and the thickness of the guide column increases from top to bottom to match the thickness of the limit bar; A first-level positioning block of the battery pack is fixed to the outside of the battery box, and the first-level positioning block of the battery pack is used to abut against the limiting bar.

Images