Battery pack for supplying power to outdoor walking equipment and battery management system

Abstract

The utility model relates to a battery pack for supplying power to outdoor walking equipment and a battery management system, the battery pack is provided with a pivotal handle and a plurality of output terminals, a battery bin for accommodating the battery pack is provided with a locking device and input terminals matched with the output terminals of the battery pack, and the battery pack is automatically locked when placed in the battery bin. When a user takes out the battery pack from the battery compartment through the handle, the locking is automatically released; at least two locking devices are arranged on the side wall of the battery bin, unlocking of the at least two locking devices can be controlled through a handle on the battery pack, and the battery pack supplies power to the same tool through at least two output terminals at the same time. By means of the structure, the battery pack can discharge efficiently, and meanwhile the battery pack is very convenient to disassemble.

Description

Technical Field

[0001] The present application relates to a battery pack and a battery management system for powering outdoor walking equipment, belonging to the field of garden tools. Background Art

[0002] With the development of battery technology, battery packs are gradually used in garden tools. Existing battery packs used with outdoor garden tools generally have a locking structure on the battery pack. When the battery pack is used with outdoor garden tools, 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 garden tool. However, with the emergence of some large electric garden tools and the requirements for battery life in certain scenarios, battery packs are getting bigger and bigger, and their weight is much greater than that of ordinary small battery packs. Users cannot control the unlocking and removal of the battery pack with one hand. The original battery pack locking and release structure is no longer suitable for such large battery packs. At the same time, these battery packs of different sizes cannot be selectively connected to the tools, that is, the same tool cannot be adapted to two battery packs of different sizes at the same time. Summary of the invention

[0003] The purpose of the present application is to provide a battery pack and a battery management system for powering outdoor walking equipment, wherein the battery compartment of the battery management system can be adapted to battery packs of at least two different sizes.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] A battery management system includes a battery pack and a battery compartment for accommodating the battery pack, wherein the battery compartment has a cavity space and at least a portion of the battery pack is placed in the battery compartment. The battery pack is provided with a handle, 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, so that the user can control the removal and placement of the battery pack with one hand. The battery pack can be automatically locked when placed in and automatically unlocked when taken out. Specifically:

[0006] The battery pack includes a cell module with multiple battery cells, a battery pack shell accommodating the cell module, and an operating part movably arranged on the shell, and the operating part is preferably a handle; the side wall of the battery compartment is provided with a locking device, and the battery pack shell 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 takes out the battery pack through the handle, the locking device and the battery pack are automatically unlocked.

[0007] In one embodiment, the handle of the battery pack is rotatably connected to the battery pack shell via a rotating shaft, and the rotating shaft includes a first rotating shaft and a second rotating shaft, and the first rotating shaft and the second rotating shaft both rotate around a first axis; the handle rotates relative to the battery pack between a storage position and an extraction position, and when the battery pack is placed in the battery compartment and the handle of the battery pack is rotated to the extraction position, the locking device on the battery compartment is unlocked, and 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 and connected to the battery pack.

[0008] In another embodiment, the handle of the battery pack slides with the battery pack shell to move between a storage position and an extraction position; a slide groove is provided on the battery pack shell, and at least part of the handle can move up and down along the slide groove; when the battery pack is placed in the battery compartment, the handle moves from the storage position to the extraction position to act on the locking device to release the locking device from the battery pack.

[0009] Furthermore, in an embodiment in which the handle rotates around the battery pack shell, the end of the handle can directly act on the locking device to unlock the locking device and the battery pack, or the rotation of the handle can drive the movement of the unlocking slider to act on the locking device; wherein the end of the handle includes a first end and a second end, and when the handle is in the storage position, the second end is farther away from the locking device; in the process of the handle rotating or moving from the storage position to the extraction position, the second end gradually approaches the locking device, and the first end gradually moves away from the locking device, and 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 handle end, a distance X between the second end and the first axis is greater than a distance Y between the first end and the first axis, and a 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 provided on the inner wall of the battery compartment, and the engaging member can move left and right under the action of the handle or the unlocking slider, thereby having an extended state extending from the locking port to the inner wall of the battery compartment and a retracted state in the locking port; the engaging member is engaged and locked with the battery pack in the extended state, and is released from the engaged and locked state with the battery pack in the retracted state; the first elastic member abuts against the engaging member, so that the engaging member has a tendency to move toward the direction of the battery compartment cavity; the shell surface of the battery pack has a protruding and / or recessed locking surface, and the engaging member of the locking assembly is engaged with the battery pack shell The locking surfaces on the surface cooperate to form a lock assembly. When the handle is turned in a preset direction, the handle and / or the unlocking slider drives the engaging part to extend and retract. The mounting bracket is fixed to the side wall of the battery compartment, and includes a locking groove. The engaging part is movably mounted in the locking groove. The first elastic part is located between the engaging part and the mounting bracket. The engaging part can be rotatably located in the locking groove. The first elastic part is a torsion spring. The engaging part can also be slidably located in the locking groove. The first elastic part is a spring. In another embodiment, the mounting bracket may not be required. The locking groove is formed with the side wall of the battery compartment. The engaging part is movably mounted in the locking groove. The first elastic part is located between the engaging part and the side wall of the battery compartment to drive the movement of the engaging part.

[0012] Furthermore, in an embodiment in which the rotation of the handle drives the movement of the unlocking slider to act on the locking device, the extension direction of the slide rail that accommodates the movement of the unlocking slider forms a certain angle with the extension direction of the first axis of rotation of the handle; preferably, the angle is 90°, that is, the extension direction of the slide rail is basically perpendicular to the extension direction of the first axis, and the rotation of the handle around the first axis drives the unlocking slider to move up and down.

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

[0014] Furthermore, a limiting portion is provided at the fitting point of the unlocking slider and the slide rail, and the limiting portion is located on the unlocking slider and / or the slide rail to limit the slider from detaching from the slide rail; specifically, a hook or a protrusion is provided on the unlocking slider, and a stop structure that cooperates with the hook or the protrusion is provided at the position of the battery pack shell near the slide rail, and the stop structure limits the unlocking slider from detaching from the slide rail under the action of the force of the second elastic member.

[0015] Furthermore, one end of the engaging member close to the unlocking slider is wedge-shaped, and the surface of the engaging member 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 downward displacement of the unlocking slider is basically equal to the displacement of the engaging member 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, and the elastic device includes multiple springs or springs. The multiple springs are evenly distributed along the bottom surface of the battery compartment to apply an ejection force to the battery pack after the battery pack is unlocked, which is convenient for removing the battery pack.

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

[0024] Furthermore, the battery pack is a cube, and 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 multiple battery cells are lithium iron phosphate battery cells, and the rated voltage of the battery pack is greater than or equal to 50V.

[0025] Furthermore, the multiple battery cells in the battery pack are arranged in parallel in the width direction of the battery pack inside the battery pack shell. The battery pack also includes a BMS control board for controlling the charging and discharging of the multiple battery cells and a bracket for supporting the multiple 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 an embodiment where the handle is configured to be rotatably connected to the battery pack shell and rotates relative to the battery pack to switch between the storage position and the extraction position, the handle forms a gripping space between the extraction position and the battery pack shell, the height of the gripping space is ≥20mm, and the handle is rotatably connected to the battery pack shell via a first rotating shaft and a second rotating shaft.

[0027] Furthermore, the side wall of the battery pack shell is also provided with a plug-in portion, which plays a guiding role when installing the battery pack into the battery compartment. The extension direction of the plug-in portion is parallel to the extension direction of the slide rail that accommodates the unlocking slider. Preferably, the central axis of the plug-in portion and the central axis of the slide rail are in the same straight line.

[0028] Furthermore, the side wall of the battery pack is also provided with an output terminal, and the inner wall of the battery compartment has an input terminal connected to the output terminal, and the output terminal is electrically connected to the input terminal to power the working tool.

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

[0030] Furthermore, 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 shell is formed with a receiving space for receiving the output terminal, and the output terminal is at least partially located in the receiving space.

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

[0032] Furthermore, the ratio of the plug-in portion 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, so as to ensure smooth and stable insertion of the battery pack into the battery compartment; slide grooves are provided on both sides of the plug-in portion, and the thickness of the slide grooves is gradually changed, so as to facilitate docking of the battery pack when it is inserted into the battery compartment; the output terminal of the battery pack is located between the slide 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 terminal and a total negative lead terminal, and the total positive lead terminal is respectively connected to the positive electrode of each output terminal of the battery pack The terminals are electrically connected, and the total negative lead-out terminal is electrically connected to the negative terminals of each output terminal of the battery pack respectively; the battery pack has at least 2 output terminals, and at least 2 output terminals are symmetrically arranged on opposite sides of the battery pack, and the output terminals are located above the plug-in portion; 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 power the tools at the same time, so that the power tools can use both the original small pack and the large pack of the present application, making the configuration of the battery pack of the power tools more flexible.

[0033] Furthermore, a boss is provided on the upper surface of the shell 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 of the present application, the handle of the battery pack is slidably matched with the battery pack shell, and a slide groove is provided on the battery pack shell, and at least part of the handle can move up and down along the slide groove, the handle is U-shaped, and has a gripping portion and a sliding portion, and the sliding portion cooperates with the slide rail on the battery pack shell;

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

[0036] Furthermore, the ratio of the length of the slide rail accommodating the sliding part on the battery pack shell 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 accommodating the sliding part; wherein the weight of the battery pack is approximately 15Kg. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 An exploded view of a battery pack in an embodiment of the present application;

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

[0040] Figure 3 This is a schematic diagram of the structure of the battery compartment in the embodiment of the present application;

[0041] Figure 4 This is a cross-sectional view of a battery pack fixed in a battery compartment in an embodiment of the present application;

[0042] Figure 5 This is a cross-sectional view of the battery pack when it is taken out of the battery compartment in the embodiment of the present application;

[0043] Figure 6 This is a schematic diagram of the structure of an outdoor walking device according to an embodiment of the present application;

[0044] Figure 7 This is a schematic diagram of the structure of the battery compartment in the embodiment of the present application;

[0045] Figure 8 A schematic diagram of the structure of the battery compartment in the embodiment of the present application;

[0046] Fig. 9 This is a schematic diagram of the structure of the battery pack handle in an embodiment of the present application;

[0047] Description of the drawings: battery pack-1; shell-11; battery cell module-12; handle-13; gripping part-131; pivoting part-132; first axis-10; unlocking slider-14; output terminal-15; plug-in part-16; locking surface 101; slide groove-100; second elastic member 141; first end-1321; second end-1322; first center dividing surface-A; gripping space-B; limiting part-1110; contact surface-140; BMS control board-18; sliding part-133; battery compartment-2; elastic device-21; input terminal-22; lock-20; locking device-3; mounting bracket-30; snap-fit ​​member-31; first elastic member-32; snap-fit ​​surface-310; mounting part-36; outdoor walking equipment-4. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided 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, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0049] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. 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 associated listed items.

[0050] The following describes preferred embodiments of a battery pack release structure, a battery pack, and an outdoor tool including the battery pack release structure in conjunction with the accompanying drawings.

[0051] Embodiment 1:

[0052] Please refer to Figure 1-Figure 6 The present application provides a battery pack 1, comprising a battery cell module 12 having a plurality of battery cells, a housing 11 for accommodating the battery cell module 12, and a handle 13 rotatable around the battery pack 1, wherein the handle 13 is U-shaped, having a gripping portion 131 and pivoting portions 132 at both ends of the gripping portion 131, wherein 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 10Kg, the shape of the handle 13 is flat, and the thickness of the handle 13 is greater than or equal to 15mm.

[0053] The shell 11 of the battery pack 1 is composed of an upper shell and a lower shell. A plurality of bolt holes are formed along the inner walls of the upper shell and the lower shell. The upper shell and the lower shell are fixedly connected through the bolt holes along the height direction of the battery pack 1. The length ratio of the upper shell and the lower shell along the height direction is greater than or equal to 1 / 2. This arrangement ensures that the battery module 12 is more easily placed in the accommodating cavity of the shell 11. Figure 2 As shown, the battery pack 1 is a cube, the capacity of the battery pack 1 is greater than 40Ah, the ratio of the capacity to the weight of the battery pack 1 is greater than or equal to 2.5Ah / kg, the handle 13 extends along the length direction of the battery pack 1, and the ratio of the length of the handle 13 to the length of the battery pack 1 is greater than or equal to 1 / 2. In this embodiment, the length of the handle 13 is substantially the same as the length of the battery pack 1. In this embodiment, the length of the battery pack 1 is approximately 400mm, the width of the battery pack 1 is approximately 180mm, the height of the battery pack 1 is approximately 241mm, the battery cell in the battery pack 1 is a lithium iron phosphate battery cell, and the rated voltage of the battery pack 1 is greater than 50V.

[0054] A movable unlocking slider 14 is provided on the opposite outer walls along the length direction of the battery pack 1, and the end of the handle 13 abuts against the unlocking slider 14. When the handle 13 is rotated, the unlocking slider 14 moves in the height direction of the battery pack 1. The outer wall of the battery pack 1 shell 11 is also provided with an output terminal 15 and a plug-in portion 16; in this embodiment, the battery pack 1 has two output terminals 15 and two plug-in portions 16, and the unlocking slider 14, the output terminal 15 and the plug-in portion 16 are arranged in sequence from top to bottom along the height direction of the battery pack 1, and the two output terminals are electrically connected.

[0055] 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 accommodating space and at least a portion of the battery pack 1 is located in the accommodating space. A locking device 3 is installed on the side of the battery compartment 2. A clamping member 31 is movably installed in the locking device 3. When the handle 13 of the battery pack 1 is rotated, the unlocking slider 14 moves up and down to drive the clamping member 31 to move in a direction away from the battery pack 1. The locking device 3 includes a mounting bracket 30. 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. The clamping member 31 is movably installed in the locking groove and the clamping member 31 abuts against the mounting bracket 30 through a first elastic member 32. A lock opening 20 is provided on the side wall of the battery compartment 2, and the engaging member 31 extends out of the lock opening 20 under the action of the first elastic member 32. The engaging member 31 overcomes the elastic force of the first elastic member 32 and retracts into the lock opening 20 under the action of the unlocking slider 14; the engaging member 31 is engaged and locked with the battery pack 1 in the extended state, and is released from the battery pack 1 in the retracted state. The surface of the shell 11 of the battery pack 1 has a locking surface 101 that cooperates with the engaging member 31. The engaging member 31 and the locking surface 101 cooperate to form a lock assembly to lock the battery pack 1 in the battery compartment 2.

[0056] The end of the handle 13 has a first end 1321 and a second end 1322, and the distance between the second end 1322 and the first axis 10 is greater than the distance between the first end 1321 and the first axis 10. When the handle 13 is in the 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 Figure 1-Figure 2 The direction in which the unlocking slider 14 moves on the surface of the battery pack 1 is substantially perpendicular to the extension direction of the first axis 10. When the handle 13 is rotated 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. The distance X between the second end 1322 of the handle 13 and the first axis 10 is greater than the distance Y between the first end 1321 and the first axis 10, and the difference in distances XY ≥ 8 mm.

[0057] The unlocking slider 14 has a bent portion near the handle 13, the surface of the battery pack 1 shell 11 has a slide groove 100 adapted to the unlocking slider 14, and a second elastic member 141 is provided between the surface of the battery pack 1 shell 11 and the bent portion. The unlocking slider 14 always keeps in contact with the end of the handle 13 under the action of the second elastic member 141. Specifically, a hook is also provided at the bent portion, and the battery pack 1 shell 11 has a slot adapted to the hook. The slot cooperates with the hook to restrict the unlocking slider 14 from leaving the slide groove 100 under the action of the second elastic member 141.

[0058] The engaging member 31 of the locking device 3 has an engaging surface 310, and the end of the unlocking slider 14 abuts against the engaging surface 310 of the engaging member 31, so that the engaging member 31 moves left and right. The engaging surface 310 has an angle with the horizontal direction of 45°, and the unlocking slider 14 has a contact surface 140 adapted to the engaging surface 310, and the engaging surface 310 and the contact surface 140 are spliced ​​and contacted at an angle of 45°; such a setting makes the displacement of the unlocking slider 14 moving downward substantially equal to the displacement of the engaging member 31 in the horizontal direction. The engaging member 31 has a depth that matches the locking surface 101 on the surface of the battery pack 1, and the depth is ≥8mm, which is approximately equal to the distance that the unlocking slider 14 moves downward. In order to avoid the situation that the edge of the engaging member 31 in the retracted state contacts the locking surface 101, which causes the battery pack 1 to be taken out unsmoothly, the end of the engaging member 31 is provided with a chamfer.

[0059] Two locking devices 3 are provided along the side of the length direction of the battery compartment 2, and the distance between the engaging member 31 of the locking device 3 and 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 center dividing plane A in the height direction perpendicular to the battery compartment 2, and the locking device 3 is located above the first center dividing plane A. This arrangement makes the moving distance of the unlocking slider 14 shorter when the battery pack 1 is unlocked, and the battery pack 1 is more stable in the battery compartment 2. Similarly, the distance between the locking surface 101 on the battery pack 1 that cooperates with the engaging member 31 and the bottom surface of the battery pack 1 is also greater than half of the height of the battery pack 1.

[0060] The end of the handle 13 of the battery pack 1 has a pivot hole, and the battery pack 1 shell 11 has a through hole corresponding to the pivot hole. The metal pin passes through the pivot hole and the through hole to rotatably connect the handle 13 and the battery pack 1 shell 11. A metal sleeve is also provided in the pivot hole and / or the through hole, and the metal sleeve is interference fit in the pivot hole and / or the through hole. Such a configuration prevents the metal pin from causing wear to the handle 13 and / or the battery pack 1 shell 11 during the rotation of the handle 13, while improving the strength of the handle 13. A boss is formed on at least one 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 detaching. The handle 13 of the battery pack 1 is also coated with soft glue, and the soft glue has a shape that matches the fingers. The user can extract the battery pack 1 with one hand or 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.

[0061] Multiple battery cells in the battery pack 1 are arranged in parallel in the battery pack 1 shell 11 along the width direction of the battery pack 1. The battery pack 1 includes a BMS control board 18 for controlling the charging and discharging of the multiple battery cells and a bracket for supporting the 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 is fixed on the battery cell bracket. 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, thereby controlling the charging and discharging of the battery pack.

[0062] When the handle 13 is rotated to the extraction position, a gripping space B is formed with the upper surface of the battery pack 1 shell 11, and the height of the gripping space B is ≥20mm. A limiting portion 1110 is formed on the upper surface of the battery pack 1 shell 11. The limiting portion 1110 and the groove formed by the upper surface of the battery pack 1 accommodate the handle 13. The limiting portion 1110 is used to limit the rotation range of the handle 13. In this embodiment, the height of the limiting portion 1110 is ≥10mm.

[0063] Two 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 in a gradual shape, 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.

[0064] 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 upward 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.

[0065] Embodiment 2:

[0066] The present embodiment provides a battery management system, which is applied to an outdoor walking device 4. The battery management system includes the battery pack 1 in the above embodiment and a battery compartment 2 for accommodating the battery pack 1, the battery compartment 2 is mounted to the outdoor walking device 4 and supported by the outdoor walking device 4, the battery compartment 1 has an input terminal 22 that cooperates with the output terminal 15 on the battery pack 1, the battery pack 1 provides power to the outdoor walking device 4 through at least two output terminals 15, and the multiple output terminals 15 are connected in parallel. A locking device 3 is provided at the inner wall of the battery compartment 2 adjacent to the input terminal 22, at least two locking devices 3 control the locking of the same battery pack 1, and the handle 13 of the battery pack 1 can control the unlocking of the two locking devices 3 by pivoting.

[0067] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A battery pack for powering outdoor walking equipment, comprising: A housing mounted to and supported by the outdoor walking equipment; A battery cell module, mounted on the housing, wherein the battery cell module includes a plurality of battery cells; The BMS control board controls the charging and discharging of multiple battery cells; its features are: The weight of the battery pack is ≥10Kg; The battery pack is a cube, the BMS control board extends along the length direction of the battery pack, 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.

2. The battery pack according to claim 1, characterized in that: The battery pack has a pivotable handle, 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.

3. The battery pack according to claim 1, characterized in that: The capacity of the battery pack is greater than or equal to 30Ah, and the ratio of the capacity to weight of the battery pack is greater than or equal to 2.5Ah / kg.

4. The battery pack according to claim 1, characterized in that: The battery cells are lithium iron phosphate battery cells, and the multiple battery cells are arranged in parallel in the housing of the battery pack along the width direction of the battery pack.

5. The battery pack according to claim 1, characterized in that: The battery pack also includes a bracket for supporting a plurality of battery cells, and the BMS control board is located above the bracket.

6. The battery pack according to claim 1, characterized in that: The battery pack also includes a plurality of output terminals, and the battery pack provides power to the outdoor walking equipment simultaneously through the output terminals.

7. The battery pack according to claim 6, characterized in that: The plurality of output terminals are electrically connected to each other.

8. A battery management system, comprising the battery pack according to any one of claims 1 to 7 and a battery compartment for accommodating the battery pack, characterized in that: The battery compartment includes a plurality of input terminals, and at least two of the input terminals are allowed to be electrically connected to the same battery pack.

9. The battery management system according to claim 8, characterized in that: A locking device is provided adjacent to the input terminal, and at least two locking devices control the locking of the same battery pack.

10. The battery management system according to claim 9, characterized in that: The handle of the battery pack can control the unlocking of at least two locking devices by pivoting.

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