Battery pack release structure, charger, portable power supply and outdoor work vehicle

Abstract

The utility model relates to a battery pack releasing structure, a charger, a portable power source and an outdoor operation vehicle, a handle is arranged on a battery pack, a locking device is arranged in a battery bin for containing the battery pack, the battery pack is automatically locked when being placed in the battery bin, and when a user takes out the battery pack from the battery bin through the handle, locking is automatically unlocked, and the battery pack is released from the battery bin. At least two locking devices are arranged on the side wall of the battery bin, and unlocking of the at least two locking devices can be controlled through a handle on the battery pack. The charger, the portable power source and the outdoor operation vehicle are provided with the battery pack releasing structure, and by means of the releasing structure, unlocking is carried out while the battery pack is taken out, so that the battery pack is very convenient to disassemble.

Description

Technical Field

[0001] This application relates to the field of outdoor gardening operation equipment, and particularly to a battery pack release structure for outdoor gardening operation equipment. Background Art

[0002] With the development of battery technology, battery packs are gradually applied to gardening tools. Generally, existing battery packs used in conjunction with outdoor gardening tools are provided with a locking structure. When the battery pack is used in conjunction with the outdoor gardening tool, the user can press the locking structure of the battery pack with one hand to remove the battery pack or fix the battery pack to the gardening tool. However, with the emergence of some large-scale electric gardening tools and the requirements for battery life in certain scenarios, the battery packs are getting larger and heavier than ordinary small battery packs. The user cannot control the unlocking and removal of the battery pack with one hand, and the original battery pack locking and releasing structure is no longer applicable to such large battery packs. Summary of the Invention

[0003] The purpose of this application is to provide a large-capacity battery pack and a release structure suitable for this battery pack.

[0004] To achieve the above objectives, the following technical solutions are adopted in this application:

[0005] A battery pack release structure includes a battery pack and a battery compartment for accommodating the battery pack. The battery compartment has a cavity space and at least part of the battery pack is placed in the battery compartment. Among them, a handle is provided on the battery pack, and a locking device is provided on the side wall of the battery compartment. The user controls the unlocking of the locking device on the battery compartment through the handle on the battery pack, which is beneficial for the user to control the removal and placement of the battery pack with one hand. The battery pack can be automatically locked when placed and automatically unlocked when removed. Specifically:

[0006] The battery pack includes a battery cell module having a plurality of battery cells, a battery pack housing for accommodating the battery cell module, and an operating member movably provided on the housing. The operating member is preferably a handle. A locking device is provided on the side wall of the battery compartment, and the housing of the battery pack has a structure that cooperates with the locking device. When the battery pack is placed in the battery compartment, the locking device can automatically lock the battery pack. When the user removes the battery pack through the handle, the locking device is automatically unlocked from the battery pack.

[0007] In one embodiment, the handle of the battery pack is rotatably connected to the battery pack housing through a rotating shaft. The rotating shaft includes a first rotating shaft and a second rotating shaft. Both the first rotating shaft and the second rotating shaft rotate around a first axis. The handle is rotatably connected to the battery pack housing through the first rotating shaft. The handle has a storage position when lying down and a lifting position when vertical. The handle rotates relative to the battery pack between the storage position and the lifting position. When the battery pack is placed in the battery compartment and the handle of the battery pack rotates to the lifting position, the locking device on the battery compartment is unlocked. When the battery pack is placed in the battery compartment and the handle of the battery pack is in the storage position, the locking device on the battery compartment is locked to the battery pack.

[0008] In another embodiment, the handle of the battery pack is slidably engaged with the battery pack housing to move between a storage position and a lifting position. A sliding groove is provided on the battery pack housing, and at least a part of the handle can move up and down along the sliding groove. When the battery pack is placed in the battery compartment, the handle acts on the locking device when moving from the storage position to the lifting position to release the locking of the locking device on the battery pack.

[0009] Further, in the embodiment where the handle rotates around the battery pack housing, the end of the handle can directly act on the locking device to unlock the locking device and the battery pack, or can drive the movement of the unlocking slider through the rotation of the handle and thus act on the locking device. Among them, the end of the handle includes a first end and a second end. When the handle is in the storage position, the second end is farther from the locking device. During the rotation or movement of the handle from the storage position to the lifting position, the second end gradually approaches the locking device, and the first end gradually moves away from the locking device. Finally, the second end acts on the locking device or the unlocking slider to unlock the unlocking device.

[0010] Specifically, the second end and the first end are located on the outer surface of the end of the handle. The distance X between the second end and the first axis is greater than the distance Y between the first end and the first axis, and the difference between X and Y is greater than or equal to 8 mm.

[0011] Specifically, the locking device on the battery compartment includes a movable engaging member, a first elastic member acting on the engaging member, and a mounting bracket for mounting the engaging member and the first elastic member; a locking port is formed on the inner wall of the battery compartment, and the engaging member can move left and right under the action of the force of the handle or the unlocking slider, so as to have a protruding state extending out of the inner wall of the battery compartment and a receiving state retracted into the locking port. The engaging member is engaged and locked with the battery pack in the protruding state, and the engaging member is disengaged from the engagement lock with the battery pack in the receiving state; the first elastic member abuts against the engaging member, so that the engaging member has a tendency to move in the direction close to the cavity of the battery compartment; the surface of the housing of the battery pack has a protruding and / or recessed locking surface, and the engaging member of the locking assembly and the locking surface on the surface of the housing of the battery pack cooperate to form a locking assembly. When the handle is rotated in a preset direction, the handle and / or the unlocking slider drive the engaging member to expand and contract; the mounting bracket is fixed on the side wall of the battery compartment and includes a locking groove. The engaging member is movably installed in the locking groove. The first elastic member is located between the engaging member and the mounting bracket. The engaging member can be rotatably located in the locking groove, and the first elastic member is a torsion spring. The engaging member can also be slidably located in the locking groove, and the first elastic member is a spring; in another embodiment, the mounting bracket may not be required, and the locking groove is formed on the side wall of the battery compartment. The engaging member is movably installed in the locking groove, and the first elastic member is located between the engaging member and the side wall of the battery compartment to drive the movement of the engaging member.

[0012] Further, in the embodiment where the unlocking slider is driven to move by the rotation of the handle and thus acts on the locking device, the extending direction of the slide rail for accommodating the movement of the unlocking slider forms a certain angle with the extending direction of the first axis of the rotation of the handle; preferably, the angle is 90°, that is, the extending direction of the slide rail is substantially perpendicular to the extending direction of the first axis, and the rotation of the handle around the first axis drives the up and down movement of the unlocking slider.

[0013] Further, a second elastic member is provided to abut against the unlocking slider, so that the unlocking slider has a tendency to move in the direction close to the end of the handle. The second elastic member is located between the housing of the battery pack and the unlocking slider, so that when the locking assembly does not need to be unlocked, the unlocking slider can be reset.

[0014] Further, a limiting portion is also provided at the mating portion of the unlocking slider and the slide rail. The limiting portion is located on the unlocking slider and / or the slide rail to limit the slider from disengaging from the slide rail; specifically, a hook or a protrusion is provided on the unlocking slider, and a stop structure cooperating with the hook or the protrusion is provided at a position of the housing of the battery pack close to the slide rail. The stop structure limits the unlocking slider from disengaging from the slide rail under the action of the force of the second elastic member.

[0015] Furthermore, one end of the engaging piece close to the unlocking slider is wedge-shaped, and the surface of the engaging piece abutting against the unlocking slider or the handle end is the engaging surface; preferably, the angle between the engaging surface and the horizontal plane is 45°, and the unlocking slider has a contact surface that cooperates with the engaging surface, and the engaging surface and the contact surface are in contact at an angle of 45°, and the downward displacement of the unlocking slider is basically equal to the displacement of the engaging piece in the left and right directions.

[0016] Furthermore, the depth of cooperation between the engaging part and the locking surface on the battery pack is ≥8mm to ensure that the engaging part can firmly fix the battery pack in the battery compartment; the end of the engaging part is provided with a chamfer to avoid the end of the engaging part interfering with the battery pack when the battery pack is taken out.

[0017] Furthermore, due to the large size of the battery pack, in order to ensure that the battery pack is firmly locked in the battery compartment, at least two locking devices are provided on the side walls of the battery compartment, and the two locking devices are respectively arranged on both sides of the length direction of the battery compartment; wherein, the distance between the locking device and the bottom surface of the battery compartment is greater than half of the depth of the battery compartment, that is, the battery compartment has a first center dividing surface in the height direction perpendicular to the battery compartment, and the locking device is located above the first center dividing surface.

[0018] Furthermore, the handle is U-shaped, having a gripping portion and a pivoting portion, the gripping portion extends along a first axial direction, the pivoting portion is substantially perpendicular to the gripping portion, and the first end portion and the second end portion are located on an outer surface of the pivoting portion; the handle is flat, and the thickness of the handle is ≥15 mm.

[0019] Furthermore, the handle is rotatably connected to the battery pack shell by a metal pin. In order to avoid wear on the battery pack shell during rotation, a metal sleeve is also provided at the pivot hole of the handle, that is, the metal sleeve is interference fit in the pivot hole, and the metal pin is rotatably connected to the metal sleeve, thereby extending the service life.

[0020] Furthermore, a boss is formed at the end of the metal pin, and the metal pin is limited in the pivot hole by the cooperation of the retaining ring and the boss, thereby preventing the metal pin from escaping from the pivot hole; at the same time, the handle is covered with soft rubber, and the soft rubber has a shape that matches the fingers. The user can operate the handle to take out the battery pack with one hand or with both hands. A notch is provided at the contact between the battery pack shell and the gripping part of the handle, so that the user can operate the handle to move the handle from the storage position to the extraction position when the handle is in the storage position.

[0021] Furthermore, a third elastic member is provided at the pivot hole of the handle, and the third elastic member is a torsion spring, so that the handle can be reset to the storage position after the user releases the force applied to the handle.

[0022] Furthermore, an elastic device is provided at the bottom of the battery compartment. The elastic device includes a plurality of springs or elastic pieces, and the plurality of springs are evenly distributed along the bottom surface of the battery compartment to apply an ejecting force to the battery pack after the battery pack is unlocked, which is beneficial to the removal of the battery pack.

[0023] Furthermore, the weight of the battery pack ≥ 10 Kg, the capacity of the battery pack ≥ 30 Ah, and the ratio of the capacity to the weight of the battery pack is greater than or equal to 2.5 Ah / kg.

[0024] Furthermore, the battery pack is a cube, the handle extends along the length direction of the battery pack, and the ratio of the length of the handle to the length of the battery pack is greater than or equal to 1 / 2; the ratio of the length of the battery pack to the height of the battery pack is greater than or equal to 1.5, and the ratio of the length of the battery pack to the width of the battery pack is greater than or equal to 2; the plurality of battery cells are lithium iron phosphate battery cells, and the rated voltage of the battery pack is greater than or equal to 50 V.

[0025] Furthermore, the plurality of battery cells in the battery pack are arranged in parallel along the width direction of the battery pack in the battery pack housing. The battery pack further includes a BMS control board for controlling the charging and discharging of the plurality of battery cells and a bracket for supporting the plurality of battery cells. The BMS control board is located above the bracket, and the ratio of the length of the BMS control board to the length of the battery pack is greater than or equal to 0.7.

[0026] Furthermore, in the embodiment where the handle is provided to be rotatably connected to the battery pack housing and rotates relative to the battery pack to switch between the storage position and the extraction position, a holding space is formed between the handle and the battery pack housing at the extraction position, and the height of the holding space ≥ 20 mm. The handle is rotatably connected to the battery pack housing through a first rotating shaft and a second rotating shaft.

[0027] Furthermore, a plug-in portion is further provided on the side wall of the battery pack housing. The plug-in portion plays a guiding role when installing the battery pack into the battery compartment. The extending direction of the plug-in portion is parallel to the extending direction of the slide rail for accommodating the unlocking slider. Preferably, the central axis of the plug-in portion and the central axis of the slide rail are the same straight line.

[0028] Furthermore, output terminals are further provided on the side wall of the battery pack, and input terminals for docking with the output terminals are provided on the inner wall of the battery compartment. The output terminals and the input terminals are electrically connected to supply power to the working tool.

[0029] Furthermore, at least two unlocking sliders are provided on both sides of the battery pack along the length direction. The handle controls the movement of the two unlocking sliders through the first rotating shaft and the second rotating shaft respectively. The unlocking sliders, output terminals, and plug-in portions on the same side wall of the battery pack are arranged in a straight line from top to bottom in sequence.

[0030] Further, the ratio of the length of the output terminal on the battery pack to the height of the battery pack is less than or equal to 0.3; the battery pack housing forms a receiving space for receiving the output terminal, and the output terminal is at least partially located in the receiving space.

[0031] Further, the housing of the battery pack is composed of an upper housing and a lower housing. The upper housing and the lower housing enclose a receiving cavity for receiving the battery cell module in the height direction of the battery pack. The output terminal is arranged on the lower housing, and the locking surface for cooperating with the locking structure is arranged on the upper housing; the ratio of the height of the upper housing to the height of the lower housing is greater than or equal to 1 / 2.

[0032] Further, the ratio of the insertion part on the side wall of the battery pack to the height of the battery pack is greater than or equal to 1 / 2 and less than or equal to 2 / 3 to ensure the smoothness and stability when the battery pack is inserted into the battery compartment; both sides of the insertion part are provided with sliding grooves, and the thickness of the sliding grooves is gradually changed to facilitate the docking when the battery pack is inserted into the battery compartment; the output terminal of the battery pack is located between the sliding grooves, and the output terminal is electrically connected to the BMS control board of the battery pack; the BMS control board of the battery pack includes a total positive lead-out terminal and a total negative lead-out terminal. The total positive lead-out terminal is electrically connected to the positive terminals of the output terminals of the battery pack respectively, and the total negative lead-out terminal is electrically connected to the negative terminals of the output terminals of the battery pack respectively; the output terminals of the battery pack are at least 2, and at least 2 output terminals are symmetrically arranged on the opposite sides of the battery pack, and the output terminals are located above the insertion part; for some power tools, in order to extend the battery life, multiple small battery packs are configured. The battery pack of the present application has 2 output terminals and can supply power to the tool at the same time. In this way, the power tool can use the original small pack or the large pack of the present application, making the configuration of the battery pack for the power tool more flexible.

[0033] Further, a boss is also arranged on the upper surface of the housing of the battery pack to limit the rotation range of the handle, and the height of the boss is ≥10 mm.

[0034] Further, in the embodiment where the handle of the battery pack of the present application is slidably matched with the battery pack housing, and the battery pack housing is provided with a sliding groove, at least part of the handle can move up and down along the sliding groove, the handle is U-shaped and has a holding part and a sliding part, and the sliding part is matched with the sliding rail on the battery pack housing;

[0035] Specifically, the sliding part has a protruding end. When the handle moves to the extraction position, the protruding end of the sliding part acts on the engaging part of the locking assembly, causing the engaging part to move away from the battery pack to release the locking of the locking device on the battery pack; wherein, unlocking devices are arranged on both sides of the battery compartment in the length direction, and the handle unlocks at least 2 locking devices during the process of moving from the storage position to the extraction position.

[0036] Further, the ratio of the length of the slide rail on the battery pack housing that accommodates the sliding part to the height of the battery pack is less than or equal to 1 / 3, and the length of the sliding part is substantially the same as the length of the slide rail that accommodates the sliding part; wherein, the weight of the battery pack is about 15 Kg. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic structural diagram of the battery pack when the handle is in the storage position in the embodiment of the present application;

[0039] Figure 2 It is a schematic structural diagram of the battery pack when the handle is in the extraction position in the embodiment of the present application;

[0040] Figure 3 It is an exploded view of the battery pack in the embodiment of the present application;

[0041] Figure 4 It is a schematic structural diagram of the battery compartment in the embodiment of the present application;

[0042] Figure 5 It is a schematic structural diagram of the battery compartment in the embodiment of the present application;

[0043] Figure 6 It is a cross-sectional view of the battery pack fixed in the battery compartment in the embodiment of the present application;

[0044] Figure 7 It is a cross-sectional view of the battery pack being taken out of the battery compartment in the embodiment of the present application;

[0045] Figure 8 It is a schematic structural diagram of the battery pack handle in the embodiment of the present application;

[0046] Figure 9 It is Figure 6 a partial enlarged view of;

[0047] Figure 10 It is Figure 7 a partial enlarged view of;

[0048] Figure 11 It is a schematic structural diagram of the charger in the embodiment of the present application;

[0049] Figure 12 It is a schematic structural diagram of the charger in the embodiment of the present application;

[0050] Figure 13This is a schematic structural diagram of the portable power supply main body according to an embodiment of the present application;

[0051] Figure 14 This is a top view of the portable power supply main body according to an embodiment of the present application;

[0052] Figure 15 This is a schematic structural diagram of an outdoor working vehicle according to an embodiment of the present application;

[0053] Description of the drawings: Battery pack - 1; Housing - 11; Cell module - 12; Handle - 13; Holding part - 131; Pivoting part - 132; First axis - 10; Unlock slider - 14; Output terminal - 15; Insertion part - 16; Locking surface 101; Chute - 100; Second elastic member 141; First end - 1321; Second end - 1322; First middle plane - A; Holding space - B; Limiting part - 1110; Contact surface - 140; BMS control board - 18; Sliding part - 133; Battery compartment - 2; Elastic device - 21; Input terminal - 22; Locking port - 20; Locking device - 3; Mounting bracket - 30; Engaging member - 31; First elastic member - 32; Engaging surface - 310; Mounting part - 36; Charger - 5; Outdoor working vehicle - 4. Detailed implementation manners

[0054] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0055] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms "above", "below", "left", "right", "vertical", "horizontal" and similar expressions used herein are for illustrative purposes only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0056] The following will describe the preferred embodiments of the battery pack release structure, the battery pack and the outdoor tool including the battery pack release structure with reference to the drawings.

[0057] Embodiment 1:

[0058] Please refer to Figures 1-3, this application provides a battery pack 1, which includes a battery cell module 12 with multiple battery cells, a housing 11 that houses the battery cell module 12, and a handle 13 that can rotate around the battery pack 1. The handle 13 is U-shaped and has a gripping portion 131 and pivot portions 132 at both ends of the gripping portion 131. The gripping portion 131 extends substantially along the length direction of the battery pack 1, and the handle 13 is rotatably connected to the battery pack 1 around a first axis 10. The weight of the battery pack 1 is greater than or equal to 15 Kg, the shape of the handle 13 is flat, and the thickness of the handle 13 is greater than or equal to 15 mm.

[0059] The housing 11 of the battery pack 1 is composed of an upper housing and a lower housing. A plurality of bolt holes are formed along the inner walls of the upper housing and the lower housing. The upper housing and the lower housing are fixedly connected through the bolt holes along the height direction of the battery pack 1. The length ratio of the upper housing and the lower housing along the height direction is greater than or equal to 1 / 2. Such a setting ensures that the battery cell module 12 can be more easily placed in the accommodation cavity of the housing 11. As shown in the figure, the battery pack 1 is a cube, the capacity of the battery pack 1 is greater than 40 Ah, the ratio of the capacity to the weight of the battery pack 1 is greater than or equal to 2.5 Ah / kg, the handle 13 extends along the length direction of the battery pack 1, and the length of the handle 13 is basically the same as the length of the battery pack 1. In this embodiment, the length of the battery pack 1 is about 400 mm, the width of the battery pack 1 is about 180 mm, the height of the battery pack 1 is about 241 mm, the battery cells in the battery pack 1 are lithium iron phosphate battery cells, and the rated voltage of the battery pack 1 is greater than 50 V.

[0060] Please refer to Figures 1-2 , movable unlocking sliders 14 are provided on the outer walls opposite to each other along the length direction of the battery pack 1. The end of the handle 13 abuts against the unlocking sliders 14. During the rotation of the handle 13, the unlocking sliders 14 move in the height direction of the battery pack 1. Among them, output terminals 15 and plug-in portions 16 are also provided on the outer wall of the housing 11 of the battery pack 1; in this embodiment, the battery pack 1 has two output terminals 15 and two plug-in portions 16, and the unlocking sliders 14, output terminals 15, and plug-in portions 16 are arranged in sequence from top to bottom along the height direction of the battery pack 1.

[0061] Please refer to Figures 4-7, the battery pack release structure includes the above-mentioned battery pack 1 and a battery compartment 2 for accommodating the battery pack 1. The battery compartment 2 has an accommodation space and at least a part of the battery pack 1 is located within the accommodation space. Among them, a locking device 3 is installed on the side of the battery compartment 2, and a engaging member 31 is movably installed within the locking device 3. When the handle 13 of the battery pack 1 rotates, the unlocking slider 14 moves up and down to drive the engaging member 31 to move away from the battery pack 1. Specifically, the unlocking slider 14 is linked with the handle 13, and the handle 13 drives the unlocking slider 14 to move. When the unlocking slider 14 moves to abut against the engaging member 31, it pushes the engaging member 31 to move away from the battery pack 1. Among them, the locking device 3 includes a mounting bracket 30, and the mounting bracket 30 is fixed to the outer wall of the battery compartment 2 by screws. The mounting bracket 30 includes a locking groove, and the engaging member 31 is movably installed within the locking groove and the engaging member 31 abuts against the mounting bracket 30 through a first elastic member 32. A locking port 20 is formed on the side wall of the battery compartment 2. The first elastic member 32 abuts against the engaging member 31, causing the engaging member 31 to have a tendency to protrude from the locking port 20. The engaging member 31 protrudes from the locking port 20 under the action of the first elastic member 32. The engaging member 31 retracts into the locking port 20 under the action of the force from the unlocking slider 14 against the elastic force of the first elastic member 32; when the engaging member 31 is in the protruding state, it is clamped and locked with the battery pack 1, and when the engaging member 31 is in the retracted state, the locking with the battery pack 1 is released. The surface of the housing 11 of the battery pack 1 has a locking surface 101 that cooperates with the engaging member 31, and the engaging member 31 and the locking surface 101 cooperate to form a locking component to lock the battery pack 1 within the battery compartment 2.

[0062] Please refer to Figure 8 , the end of the handle 13 has a first end 1321 and a second end 1322, and the distance of the second end 1322 from the first axis 10 is greater than the distance of the first end 1321 from the first axis 10. When the handle 13 is in the lying flat storage position, the first end 1321 of the handle 13 contacts the unlocking slider 14, and when the handle 13 is in the extraction position, the second end 1322 of the handle 13 contacts the unlocking slider 14. Please refer to Figures 1-2 , the moving direction of the unlocking slider 14 on the surface of the battery pack 1 is substantially perpendicular to the extending direction of the first axis 10. When the handle 13 rotates from the storage position to the extraction position, the unlocking slider 14 moves downward along the height direction of the battery pack 1 under the action of the end of the handle 13. Among them, the distance X of the second end 1322 of the handle 13 from the first axis 10 is greater than the distance Y of the first end 1321 from the first axis 10, and the difference in the distances X - Y ≥ 8 mm.

[0063] Please refer to Figures 6-7, the unlocking slider 14 has a bent portion near the handle 13. The surface of the housing 11 of the battery pack 1 has a chute 100 adapted to the unlocking slider 14. A second elastic member 141 is further provided between the surface of the housing 11 of the battery pack 1 and the bent portion. The unlocking slider 14 always maintains contact with the end of the handle 13 under the action of the force of the second elastic member 141. Specifically, a hook is further provided at the bent portion. The housing 11 of the battery pack 1 has a card slot adapted to the hook. The cooperation between the card slot and the hook restricts the unlocking slider 14 from disengaging from the chute 100 under the action of the second elastic member 141.

[0064] Please refer to Figures 9-10 , the engaging member 31 of the locking device 3 has an engaging surface 310. The end of the unlocking slider 14 abuts against the engaging surface 310 of the engaging member 31, causing the engaging member 31 to move left and right. Among them, the engaging surface 310 has an angle with the horizontal direction, and the angle is 45°. The unlocking slider 14 has a contact surface 140 adapted to the engaging surface 310. The engaging surface 310 and the contact surface 140 are spliced and contacted at a 45° angle; such a setting makes the displacement of the unlocking slider 14 moving downward basically equal to the displacement of the engaging member 31 in the horizontal direction. The engaging member 31 has a depth that cooperates with the locking surface 101 on the surface of the battery pack 1, and the depth ≥ 8 mm, which is approximately equal to the distance that the unlocking slider 14 moves downward. In order to prevent partial edges of the engaging member 31 from contacting the locking surface 101 when the engaging member 31 is in the retracted state and causing the battery pack 1 to be taken out smoothly, a chamfer is provided at the end of the engaging member 31.

[0065] Please refer to Figures 6-7 , two locking devices 3 are provided on the side of the battery compartment 2 along the length direction. The distance from the engaging member 31 of the locking device 3 to the bottom of the battery compartment 2 is greater than half of the depth of the battery compartment 2, that is, the battery compartment 2 has a first middle dividing surface A in the height direction perpendicular to the battery compartment 2, and the locking device 3 is located above the first middle dividing surface A. Such a setting makes the moving distance of the unlocking slider 14 shorter when the battery pack 1 is unlocked, and at the same time the battery pack 1 is more stable in the battery compartment 2. Similarly, the distance from the locking surface 101 on the battery pack 1 that cooperates with the engaging member 31 to the bottom surface of the battery pack 1 is also greater than half of the height of the battery pack 1.

[0066] Please refer to Figures 6-7, the end of the handle 13 of the battery pack 1 has a pivot hole, and the housing 11 of the battery pack 1 has a through hole corresponding to the pivot hole. A metal pin passes through the pivot hole and the through hole to rotatably connect the handle 13 and the housing 11 of the battery pack 1. Among them, a metal sleeve is also provided in the pivot hole and / or the through hole, and the metal sleeve is interference-fitted in the pivot hole and / or the through hole. This setting avoids the wear of the handle 13 and / or the housing 11 of the battery pack 1 caused by the metal pin during the rotation process of the handle 13, and at the same time improves the strength of the handle 13. At least one end of the metal pin is formed with a boss, and the metal pin is limited in the pivot hole by the cooperation of the retaining ring and the boss, avoiding the detachment of the metal pin. The handle 13 of the battery pack 1 is also covered with soft glue, and the soft glue has a shape matching the fingers. The user can extract the battery pack 1 with one hand or take out the battery pack 1 with both hands. Optionally, a third elastic member is provided at the rotating shaft of the handle 13, and the third elastic member is a torsion spring. When the battery pack 1 does not need to be taken out, the handle 13 automatically returns to the storage position under the action of the torsion spring.

[0067] Please refer to Figure 3 , multiple battery cells in the battery pack 1 are arranged in parallel along the width direction of the battery pack 1 in the housing 11 of the battery pack 1. The battery pack 1 includes a BMS control board 18 for controlling the charging and discharging of multiple battery cells and a bracket for supporting multiple battery cells. The BMS control board 18 is located above the bracket, the BMS control board 18 is located above the battery cell module and fixed on the bracket of the battery cells. The ratio of the length of the BMS control board 18 to the length of the battery cell bracket is greater than or equal to 1 / 2. Preferably, the ratio of the length of the BMS control board 18 to the length of the battery cell bracket is greater than or equal to 0.7.

[0068] Please refer to Figure 2 , when the handle 13 rotates to the extraction position, a holding space B is formed with the upper surface of the housing 11 of the battery pack 1. The height of the holding space B ≥ 20 mm. A limiting portion 1110 is formed on the upper surface of the housing 11 of the battery pack 1. The groove formed by the limiting portion 1110 and the upper surface of the battery pack 1 accommodates the handle 13. The limiting portion 1110 is used to limit the rotation amplitude of the handle 13. In this embodiment, the height of the limiting portion 1110 ≥ 10 mm.

[0069] Please refer to Figures 1-2Two unlocking sliders 14 are provided on both sides of the battery pack 1 along the length direction. The unlocking sliders 14, the output terminals 15 and the plug-in portion 16 are arranged in sequence from top to bottom along the same straight line; wherein, the ratio of the length of the output terminals 15 of the battery pack 1 to the height of the battery pack 1 is less than or equal to 0.3, and the housing 11 of the battery pack 1 has a receiving space for the output terminals 15. The plug-in portion 16 is located at the lower side of the battery pack 1, and the ratio of the length of the plug-in portion 16 to the height of the battery pack 1 is greater than or equal to 1 / 2, so as to ensure that the battery pack 1 is smoothly and stably inserted into the battery compartment 2. Slide grooves 100 are provided on both sides of the plug-in portion 16, and the thickness of the slide grooves 100 is gradually changed, so as to facilitate the docking of the battery pack 1 when it is inserted into the battery compartment 2. The battery compartment 2 has a mounting portion 36 that cooperates with the plug-in portion.

[0070] Please refer to Figure 4 , Figure 7 and Figure 14 The bottom of the battery compartment 2 is provided with an elastic device 21, which includes a plurality of elastic members, and the plurality of elastic members are evenly distributed on the bottom surface of the battery compartment 2. After the locking device 3 on the battery compartment 2 releases the lock on the battery pack 1, the battery pack 1 pops up under the action of the elastic members. In this embodiment, the elastic device 21 includes 6 elastic members, and 3 elastic members are provided on each side along the length direction of the battery compartment 2.

[0071] Embodiment 2:

[0072] The principle of the release structure of the battery pack 1 of this embodiment is basically the same as that of the embodiment 1, except that the operating member of the battery pack 1 of this embodiment is a handle 13, which cooperates with the battery pack 1 shell 11 by sliding. Specifically, the handle 13 slides along the height direction of the battery pack 1 and has a storage position and an extraction position. The handle 13 unlocks the unlocking devices on both sides of the battery compartment 2 during the movement from the storage position to the extraction position. The handle 13 includes a gripping portion 131 and a sliding portion 133. The surface of the battery pack 1 shell 11 has a slide groove 100. The sliding portion 133 of the handle 13 cooperates with the slide groove 100 on the battery pack 1 shell 11. When at least part of the handle 13 slides along the slide groove 100, it acts on the engaging member 31, causing the engaging member 31 to move in a direction away from the battery pack 1. The ratio of the length of the slide groove 100 to the height of the battery pack 1 is less than or equal to 1 / 2.

[0073] Embodiment 3:

[0074] Please refer to Figures 11-12 This embodiment provides a charger 5 for charging a battery pack 1, and the charger 5 has the above-mentioned battery pack release structure. Specifically, the main body of the charger 5 forms a battery compartment 2, and the battery pack 1 is placed in the battery compartment 2. The control circuit of the charger 5 receives power from an external power source to charge the battery pack 1.

[0075] Example 4:

[0076] Please refer to Figure 13 , this embodiment provides a portable power source. The surface of the portable power source has an AC output interface and a DC output interface. The portable power source includes the battery pack release structure and the inverter in the above embodiment. The main body of the inverter forms a battery compartment 2, and the battery compartment 2 receives the battery pack 1 in the above embodiment to form a portable power source. The battery pack release structure as described above is used between the battery pack 1 and the battery compartment 2. The portable power source main body internally has an inverter, and the inverter converts the electrical energy of the battery pack 1 and then outputs it.

[0077] Example 5:

[0078] Please refer to Figure 15 , this embodiment provides an outdoor working vehicle 4. The outdoor working vehicle 4 includes a power source system, a traveling mechanism, and a cutting mechanism. The power source system includes a battery pack 1 and a battery compartment 2 for accommodating the battery pack 1. The battery compartment 2 is installed on the frame of the outdoor working vehicle 4 and supported by the frame of the outdoor working vehicle 4. The battery pack 1 is placed in the battery compartment 2 and locked by a locking device 3 on the battery compartment 2. The outdoor working vehicle 4 in this embodiment uses the battery pack release structure in the above embodiment. The unlocking of the locking device 3 can be controlled through the handle 13 on the battery pack 1, so as to remove the battery pack 1. Output terminals 15 are provided on both sides of the battery pack 1, and input terminals 22 are provided at corresponding positions of the battery compartment 2. The output terminals 15 and the input terminals 22 cooperate to provide power for the outdoor working vehicle 4.

[0079] As described above, the above are only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution of the present application and its application concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present application.

Claims

1. A battery pack release structure, comprising a battery compartment and a battery pack placed in the battery compartment, characterized in that: The battery pack includes a shell and a battery cell module accommodated in the shell; The battery compartment side wall is provided with a locking device, the battery pack is placed in the battery compartment, and the locking device can automatically lock the battery pack; wherein, The locking device includes a movable engaging member, and the shell surface of the battery pack has a locking surface. The engaging member and the locking surface cooperate to form a locking assembly to fix the battery pack in the battery compartment.

2. The battery pack release structure according to claim 1, characterized in that: The battery pack also includes an operating member movably arranged on the shell and an unlocking slider cooperating with the operating member. The unlocking slider is linked with the operating member and is driven to move by the operating member. When the unlocking slider moves to abut against the engaging member, the engaging member is pushed to move in a direction away from the battery pack.

3. The battery pack release structure according to claim 2, characterized in that: The end of the engaging piece abuts against the end of the unlocking slider, the end of the engaging piece has an engaging surface in contact with the unlocking slider, the unlocking slider has a contact surface that cooperates with the engaging surface, and the engaging surface and the contact surface are in contact at an angle of 45°.

4. The battery pack release structure according to claim 3, characterized in that: The operating member includes a handle, the handle is rotatably connected to the battery pack housing via a first rotating shaft, and the handle has a storage position when lying down and a extraction position when standing upright; The direction in which the unlocking slider moves is perpendicular to the extension direction of the first rotating shaft. The shell surface of the battery pack has a slide groove. The unlocking slider is limited in the slide groove and abuts against the end of the handle. When the handle is rotated from the storage position to the extraction position, the handle pushes the unlocking slider toward the locking part.

5. The battery pack release structure according to claim 3, characterized in that: The operating member is a handle, and a surface of the battery pack shell has a slide groove. When at least a portion of the handle slides along the slide groove, it acts on the engaging member to move the engaging member in a direction away from the battery pack.

6. The battery pack release structure according to claim 2, characterized in that: The inner wall of the battery compartment has a locking opening, and the engaging member has an extended state when extending out of the locking opening and a retracted state when retracting into the locking opening. The locking device also includes a first elastic member, which abuts against the engaging member so that the engaging member has a tendency to extend out of the locking opening.

7. The battery pack release structure according to claim 6, characterized in that: The locking device also includes a mounting bracket, which is fixed to the side wall of the battery compartment. The mounting bracket includes a locking groove, and the engaging member is movably mounted in the locking groove. The first elastic member is located between the engaging member and the mounting bracket.

8. A battery pack charger, characterized in that: It includes the battery pack release structure as described in any one of claims 1 to 7, the main body of the charger forms the battery compartment, and the control circuit of the charger receives electrical energy from an external power source to charge the battery pack.

9. A portable power source, characterized in that: It comprises the battery pack release structure and inverter as described in any one of claims 1 to 7, wherein the main body of the inverter forms the battery compartment, and the battery pack is placed in the battery compartment to form a portable power source for converting the electrical energy of the battery pack and outputting it.

10. An outdoor work vehicle, characterized in that: Comprising the battery pack release structure according to any one of claims 1 to 7, the battery compartment is mounted to the outdoor work vehicle and supported by the frame of the outdoor work vehicle.

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