Battery pack and portable power supply

Abstract

The utility model relates to a battery pack and a portable power source, the battery pack is provided with a handle, a battery bin containing the battery pack is provided with a locking device, the battery pack is automatically locked when placed in the battery bin, and the battery pack is automatically unlocked when a user takes out the battery pack from the battery bin through the handle; a battery bin is formed in a main body of the portable power supply, 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 a battery pack, at least two output terminals are further arranged on the two sides of the battery pack, and an inversion module is arranged in the portable power supply. The inversion module receives the electric energy of the battery pack through the output terminals on the two sides of the battery pack, converts the electric energy and outputs the converted electric energy.

Description

Technical Field

[0001] This application relates to the field of energy storage devices, and particularly to a battery pack and a portable power source with the battery pack. Background Art

[0002] With the development of battery technology, battery packs are gradually applied to garden tools. Generally, a locking structure is provided on the existing battery packs used in conjunction with outdoor garden tools. When the battery pack is used with the outdoor garden 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 garden tool. However, with the emergence of some large-scale electric garden tools and the requirements for battery life in certain scenarios, the battery packs are getting larger and their weight is much greater than that of ordinary small battery packs. The user cannot control the unlocking and removal of the battery pack with one hand, and the original locking and releasing structure of the battery pack is no longer applicable to such large battery packs.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 portable power source with the battery pack.

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

[0005] A portable power source includes a battery pack and a battery compartment for accommodating the battery pack. The battery compartment has a cavity space and at least a part of the battery pack is placed in the battery compartment. Wherein, 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 with multiple 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, and both the first rotating shaft and the second rotating shaft rotate around a first axis. The handle rotates between a storage position and a extraction position relative to the battery pack. When the battery pack is placed in the battery compartment and the handle of the battery pack rotates to the extraction 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 extraction position; a chute is provided on the battery pack housing, and at least a part of the handle can move up and down along the chute; 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 extraction 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 then act on the locking device; wherein, 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 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. 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 from the second end to the first axis is greater than the distance Y from the first end to 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 opening is formed on the inner wall of the battery compartment. 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 opening. The engaging member is in a clamped and locked state with the battery pack in the protruding state, and the engaging member is released from the clamped and locked state with the battery pack in the receiving state; the first elastic member abuts against the engaging member to make the engaging member tend to move in the direction of the battery compartment cavity; the surface of the housing of the battery pack has a protruding and / or recessed locking surface. The engaging member of the locking assembly cooperates with the locking surface on the surface of the battery pack housing 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, 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] 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, a plug-in portion is 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 on the same straight line.

[0028] Furthermore, an output terminal is provided on the side wall of the battery pack. The inner wall of the battery compartment has an input terminal for docking with the output terminal. The output terminal is electrically connected to the input terminal 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] 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 housing forms an accommodation space for accommodating the output terminal, and the output terminal is at least partially located in the accommodation space.

[0031] Furthermore, the housing of the battery pack is composed of an upper housing and a lower housing. The upper housing and the lower housing enclose an accommodation cavity for accommodating 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] 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 to ensure the smoothness and stability when the battery pack is inserted into the battery compartment; tracks are provided on both sides of the plug-in portion, and the shape of the tracks is gradually changing to facilitate the docking when the battery pack is inserted into the battery compartment; the output terminals of the battery pack are located between the chutes, and the output terminals are 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 each output terminal of the battery pack respectively, and the total negative lead-out terminal is electrically connected to the negative terminals of each output terminal of the battery pack respectively; there are at least 2 output terminals of the battery pack, 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 will be 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 packs or the large pack of the present application, making the configuration of the battery pack for the power tool more flexible.

[0033] Furthermore, a boss is provided 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] Furthermore, in the embodiment where the handle of the battery pack in this application is in sliding fit with the housing of the battery pack, a chute is provided on the housing of the battery pack, and at least a part of the handle can move up and down along the chute. The handle is U-shaped and has a holding part and a sliding part, and the sliding part is engaged with the slide rail on the housing of the battery pack;

[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 provided on both sides of the battery compartment along 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] Furthermore, the ratio of the length of the slide rail on the housing of the battery pack 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 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 of the portable power supply in the embodiment of the present application;

[0042] Figure 5 It is a schematic structural diagram of the battery compartment of the portable power supply 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 This 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 This is a schematic structural diagram of the handle of the battery pack 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 This is a schematic structural diagram of the portable power supply in the embodiment of the present application;

[0049] Figure 12 This is a schematic structural diagram of the portable power supply in the embodiment of the present application;

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

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

[0052] Figure 15 This is a schematic structural diagram of the portable power supply in the embodiment of the present application;

[0053] Description of the drawings: Battery pack - 1; Housing - 11; Battery 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; Second 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; Portable power supply - 5. Detailed Description of the Invention

[0054] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. 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 accompanying 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 having a plurality of battery cells, a housing 11 for accommodating 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 holding portion 131 and pivot portions 132 at both ends of the holding portion 131. The holding 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 substantially 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, a movable unlocking slider 14 is 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 slider 14. During the rotation of the handle 13, the unlocking slider 14 moves in the height direction of the battery pack 1. Among them, an output terminal 15 and a plug-in portion 16 are further 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 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.

[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 accommodating space and at least a part of the battery pack 1 is located in the accommodating 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 in 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. Among them, 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, and the engaging member 31 is movably installed in 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 opened on the side wall of the battery compartment 2, and the engaging member 31 extends out of 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 unlocking slider 14 against the elastic force of the first elastic member 32; the engaging member 31 is engaged and locked with the battery pack 1 in the extended state, and the engaging member 31 is disengaged from the locking of the battery pack 1 in the retracted state. 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 in 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 from the second end 1322 to the first axis 10 is greater than the distance from the first end 1321 to 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. 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 from the second end 1322 of the handle 13 to the first axis 10 is greater than the distance Y from the first end 1321 to the first axis 10, and the difference in distance 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. 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 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 the situation that when the engaging member 31 is in the retracted state, part of the edge contacts the locking surface 101, resulting in unsmooth removal of the battery pack 1, 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 plane A in the height direction perpendicular to the battery compartment 2, and the locking device 3 is located above the first middle plane 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 press-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 lift 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 in the housing 11 of the battery pack 1 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 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 to the bracket of the battery cell, and 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 is ≥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 is ≥10 mm.

[0069] Please refer to Figures 1 - 2, two unlocking sliders 14 are provided on both sides of the battery pack 1 along the length direction. The unlocking sliders 14, output terminals 15, and plug-in portions 16 are arranged in sequence from top to bottom along the same straight line. Among them, the ratio of the length of the output terminal 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 accommodating the output terminal 15. The plug-in portion 16 is located on 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 to ensure the smoothness and stability when the battery pack 1 is inserted into the battery compartment 2. Tracks 100 are provided on both sides of the plug-in portion 16, and the thickness of the tracks 100 is in a gradually changing shape to facilitate the docking when the battery pack 1 is inserted into the battery compartment 2. The inner wall of the battery compartment 2 has a mounting portion 36 that cooperates with the plug-in portion 16.

[0070] The battery pack 1 has a first middle plane perpendicular to the length direction of the battery pack 1 and a second middle plane A perpendicular to the height direction of the battery pack 1. The distance from the output terminal 15 to the second middle plane A is less than the distance from the output terminal 15 to the first middle plane.

[0071] Please refer to Figure 4 , Figure 7 and Figure 14 , an elastic device 21 is provided at the bottom of the battery compartment 2. The elastic device 21 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.

[0072] Embodiment 2:

[0073] Please refer to Figure 15 shown. This embodiment provides a portable power source 5, which includes an inverter as shown in Figure 13 and the battery pack 1 in the above embodiment. As shown in Figure 13 and Figure 15 shown, the main body of the inverter forms a battery compartment 2, and the battery pack 1 is detachably connected in the battery compartment 2. Locking devices 3 are provided on opposite sides along the length direction of the battery compartment 2. The portable power source 5 uses the battery pack release structure in the above embodiment, and the operator can control the unlocking of the locking device 3 through the handle 13 on the battery pack 1. The inverter has an inverter module, and the inverter module converts the electrical energy of the battery pack 1 and outputs alternating current or direct current through the output interface on the surface of the portable power source 5, or receives external electrical energy and converts it to charge the battery pack 1.

[0074] The battery pack 1 has two output terminals 15, which are connected in parallel between the output terminals 15. The inner wall of the battery compartment 2 has input terminals 22 that cooperate with the output terminals 15. The input terminals 22 are docked and cooperated with the output terminals 15, and direct current power is provided to the inverter through the output terminals on both sides. The inverter module converts the DC electrical energy of the battery pack and outputs it through the output port on the surface of the portable power source, or converts the externally input electrical energy and charges the battery pack.

[0075] 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 in the present application, according to the technical solution and application concept of the present application, makes equivalent substitutions or changes, and should be covered within the protection scope of the present application.

Claims

1. A battery pack, comprising a housing and a cell module disposed in the housing, wherein the cell module comprises a plurality of cells, characterized in that: The battery pack has an output terminal on a side wall perpendicular to the length direction of the battery pack, and the ratio of the length of the output terminal to the height of the battery pack is less than or equal to 0.

3.

2. The battery pack according to claim 1, characterized in that: The battery pack has a first center dividing plane perpendicular to the length direction of the battery pack and a second center dividing plane perpendicular to the height direction of the battery pack, and the distance between the output terminal and the second center dividing plane is smaller than the distance between the output terminal and the first center dividing plane.

3. The battery pack according to claim 1, characterized in that: Output terminals are provided on opposite sides of the battery pack, and the output terminals are electrically connected.

4. A portable power source, comprising an inverter and a battery pack according to any one of claims 1 to 3, wherein a battery compartment is formed on the main body of the inverter, and the battery pack is detachably connected in the battery compartment; wherein: The side wall of the battery compartment has a locking device, the surface of the battery pack has a protruding and / or recessed locking surface, and the locking device cooperates with the locking surface to fix the battery pack in the battery compartment.

5. The portable power source according to claim 4, characterized in that: At least two input terminals are arranged on the inner wall of the battery compartment, and the output terminals on both sides of the battery pack are docked with the input terminals, and direct current is provided to the inverter through the output terminals on both sides.

6. The portable power source according to claim 4, characterized in that: The side wall of the battery pack has an inserting portion, which plays a guiding role when the battery pack is installed in the battery compartment, and the inserting portion is located below the output terminal.

7. The portable power source according to claim 6, characterized in that: The ratio of the length of the plug-in portion to the height of the battery pack is greater than or equal to 1 / 2.

8. The portable power source according to claim 7, characterized in that: Tracks are provided on both sides of the plug-in portion, and the shape of the tracks is gradual to facilitate the insertion of the battery pack.

9. The portable power source according to claim 4, characterized in that: The inverter has an inverter module, which converts the electric energy of the battery pack and outputs AC or DC, or converts the externally input electric energy and outputs charging electric energy to the battery pack.

10. The portable power source according to claim 4, characterized in that: The battery pack has an operating member and an unlocking slider matched with the operating member. The unlocking slider is driven to move by the rotation of the operating member, thereby releasing the locking device and the battery pack from locking.

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