Backpack battery

Abstract

The utility model provides a kind of backpack battery, comprising: battery pack body, battery pack body includes shell and the electric core being set in shell, the rear end outer wall of shell is rotatably installed with connecting seat, the rotation axis of connecting seat is parallel to the width direction of shell, first wire is equipped on connecting seat, the first end of first wire extends to shell, and with electric core electric connection and realizes power taking, the second end of first wire extends to connecting seat outside, and first electric connector is set in its end portion, first electric connector can be electrically connected with electric equipment and power supply for electric equipment;When first electric connector is deflected by pulling force, it can drive connecting seat to rotate relative to shell and reduce or eliminate bending moment on connecting seat;Wearing component is set on battery pack body, for carrying battery pack body on back. The utility model backpack battery, compact structure, reliable connection, can effectively inhibit pulling force bending moment, high safety in use, good reliability and long service life.

Description

Technical Field

[0001] This utility model relates to a battery, and more particularly to a backpack battery. Background Technology

[0002] Backpack batteries are portable power devices that integrate battery packs into the structure of a backpack for users to carry while moving. They are widely used in scenarios such as powering power tools, outdoor work, and emergency rescue.

[0003] Currently, common backpack batteries typically have electrical connectors or wires directly fixed to the battery pack casing. In use, the battery pack is electrically connected to external devices via wires, or directly plugged into the connector on the casing for power supply.

[0004] However, in actual use, backpack batteries are subjected to tensile forces from different directions as the user moves or the equipment moves. For example, when using a vibrator for compaction, the cable between the vibrator and the backpack battery swings frequently, making it easy for it to get caught on rebar and pull. Since the wires or connectors are rigidly or semi-rigidly fixed to the housing, when the direction of the tensile force is at a certain angle to the connection point, a significant lever arm will be generated at the connection point. This lever arm will cause the wire root or the joint between the connector and the housing to bear additional bending moments. After long-term or repeated stress, the insulation layer or core wire of the wire is prone to fatigue fracture at the connection point with the housing, or the solder joints, screws or other connection structures between the connector and the housing may loosen or even crack.

[0005] It not only affects the electrical reliability of the battery pack, but may also cause short circuits, open circuits, or even safety accidents. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a backpack battery that is compact in structure, reliable in connection, can effectively suppress tensile bending moment, has high safety, good reliability and long service life.

[0007] This utility model provides a backpack battery, which includes:

[0008] The battery pack body includes a housing 1 and battery cells disposed within the housing 1. A connecting seat 2 is rotatably mounted on the rear outer wall of the housing 1. The rotation axis of the connecting seat 2 is parallel to the width direction of the housing 1. A first wire 31 is provided on the connecting seat 2. The first end of the first wire 31 extends into the housing 1 and is electrically connected to the battery cells to draw power. The second end of the first wire 31 extends out of the connecting seat 2 and is provided with a first electrical connector 32 at its end. The first electrical connector 32 can be electrically connected to and supply power to electrical devices. When the first electrical connector 32 is subjected to a deflection force, it can drive the connecting seat 2 to rotate relative to the housing 1 and reduce or eliminate the bending moment on the connecting seat 2.

[0009] Wearable component 5 is disposed on the battery pack body for carrying the battery pack body on the back.

[0010] Furthermore, the length direction of the second end of the first wire 31 is perpendicular to the rotation axis of the connecting seat 2.

[0011] Furthermore, a receiving groove 10 is provided on the rear outer wall of the housing 1, and the connecting seat 2 is disposed in the receiving groove 10. In the retracted state, the connecting seat 2 does not protrude from the rear outer wall of the housing 1.

[0012] Furthermore, the lower end of the receiving groove 10 extends downward to the bottom surface of the housing 1 and can accommodate the naturally hanging first wire 31 or the second wire 41 of the electrical equipment.

[0013] Furthermore, the connector 2 is provided with an anti-pull structure, which can prevent the tension from being transmitted to the connection between the first end of the first conductor 31 and the battery cell when it is stretched.

[0014] Furthermore, the connector 2 is provided with an L-shaped channel 20 at a right angle or an acute angle, and the first wire 31 is disposed in the L-shaped channel 20 to form the anti-pull structure.

[0015] Furthermore, convex shafts 21 are symmetrically arranged on both sides of the first end of the connecting seat 2, and the receiving groove 10 on the outer wall of the battery pack body is provided with shaft holes 100 that allow the convex shafts 21 to be inserted and rotated; one end of the convex shaft 21 passes through a first wire hole 201 that allows the first end of the first wire 31 to pass through, and the second end of the connecting seat 2 is provided with a second wire hole 202 that allows the second end of the first wire 31 to pass through, and the first wire 31 between the first wire hole 201 and the second wire hole 202 is L-shaped bent.

[0016] Furthermore, the outer wall of the rear end of the housing 1 is provided with multiple protrusions to form a support 12. When the back of the battery pack body is placed downwards, the support 12 can support the battery pack body and create a gap between the folded connecting seat 2 and the ground.

[0017] This backpack battery utilizes a rotatable connector mounted on the outer wall of the casing, with a first wire positioned on this connector. When the device or the second wire is accidentally dragged or hooked, a deflecting force is generated on the first connector. At this time, the connector can adaptively rotate relative to the casing. This rotation causes the root of the first wire to deflect along with the connector, thus directing the line of action of the pulling force towards the center of rotation of the connector, significantly shortening or even eliminating the lever arm. This effectively prevents the first wire or the first connector from breaking or detaching due to fatigue. This backpack battery features a compact structure, reliable connection, effective suppression of tensile bending moments, high safety, good reliability, and a long service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the backpack battery of this utility model;

[0019] Figure 2 This is a schematic diagram of the backpack battery of this utility model under tension.

[0020] Figure 3 This is a schematic diagram of the casing of the backpack battery of this utility model;

[0021] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0022] Figure 5 This is a schematic diagram of the structure of the backpack battery connector of this utility model;

[0023] Figure 6 This is an exploded structural diagram of the connector for the backpack battery of this utility model.

[0024] Figure 7 This is a schematic diagram of the anti-pull structure of the backpack battery of this utility model;

[0025] Figure 8 This is a schematic diagram of the L-shaped channel of the backpack battery of this utility model.

[0026] In the figure: 1. Housing, 1a. Rear end outer wall, 10. Receiving groove, 12. Support, 100. Shaft hole, 2. Connecting seat, 2a. First connecting seat, 2b. Second connecting seat, 20. L-shaped channel, 21. Protruding shaft, 201. First wire hole, 202. Second wire hole, 31. First wire, 32. First electrical connector, 311. First segment, 312. Second segment, 313. Third segment, 41. Second wire, 42. Second electrical connector, 5. Wearable component. Detailed Implementation

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] See Figures 1-8 This utility model provides a backpack battery, which includes a battery pack body and a wearable component 5.

[0029] The battery pack body serves as the core energy storage unit, comprising a housing 1 and battery cells housed within the housing 1. The housing 1 is injection molded from engineering plastic with a certain structural strength, combining lightweight and impact resistance. A charging interface is provided on the side wall of the housing 1.

[0030] Wearable component 5 is mounted on the battery pack body and is used to carry the battery pack body on the back; the wearable component 5 is an adjustable shoulder strap structure, including shoulder straps and waist belt; it provides reliable support for the stable carrying of the battery pack body.

[0031] In this application, a connector 2 is rotatably mounted on the outer wall of the housing 1. A first wire 31 is provided on the connector 2. The first end of the first wire 31 extends into the housing 1 and is electrically connected to the battery cell inside the housing 1, thereby realizing power extraction. The second end of the first wire 31 is provided with a first electrical connector 32, which can be electrically connected to the electrical device and supply power to the electrical device. Specifically, the electrical device has a second wire 41, and the end of the second wire 41 is provided with a second electrical connector 42, which can achieve a quick plug-in electrical connection with the first electrical connector 32.

[0032] When the first electrical connector 32 is subjected to a deflection force, that is, when the second wire 41 on the electrical equipment is accidentally pulled, the force is transmitted to the first electrical connector 32. Through the rotation setting of the connector 2, the connector 2 can be driven to rotate relative to the housing 1, thereby reducing or eliminating the bending moment on the connector 2.

[0033] This application rotatably mounts a connector 2 on the outer wall of the housing 1 and places the first wire 31 on the connector 2. When the electrical equipment or the second wire is accidentally dragged or hooked, a deflecting pull will be generated on the first electrical connector 32. At this time, the connector 2 can adaptively rotate relative to the housing 1. This rotation causes the root of the first wire 31 to deflect along with the connector 2, so that the line of action of the pull tends to pass through the rotation center of the connector 2, greatly shortening or even eliminating the lever arm. Compared with the traditional rigid fixed wire structure, this application fundamentally avoids the accumulation of bending moment at the connection between the wire or electrical connector and the housing, effectively preventing the first wire 31 or the first electrical connector from breaking or falling off due to fatigue.

[0034] In this application, the second end of the first conductor 31 extends outside the connector 2, and a first electrical connector 32 is provided at the end of the first conductor 31; this enables the first electrical connector to form a free end, which facilitates plugging into the electrical equipment in a carrying state.

[0035] By setting the first electrical connector 32 as a free-end structure, when the user uses the backpack battery, there is no need to remove the battery pack from the back or twist the body with effort. The user can simply pick up the first electrical connector 32 from the side of the connector 2 and easily plug it into the second electrical connector 42 of the electrical device. This avoids the problem of limited plugging angle caused by fixed installation position.

[0036] Rigidly fixed connectors require the plug of the electrical equipment to be aligned with the socket on the housing at a specific angle, which is difficult when the line of sight is obstructed or when operating with one hand. The first electrical connector 32 of this application can move flexibly with the user's gestures, which greatly reduces the difficulty of alignment and improves the ease of use.

[0037] Furthermore, in this application, the portion of the first wire 31 extending beyond the connector 2 retains sufficient flexible length. During normal insertion and removal operations, the first electrical connector 32 can move freely without being constrained by the rotating structure of the connector 2. When subjected to accidental pulling, the pulling force is transmitted to the connector 2 after passing through the first electrical connector 32 and the first wire, triggering the connector 2 to rotate and dissipate the force. This prevents the pulling force from being directly transmitted to the connector 2 through the first electrical connector. This not only facilitates the insertion and removal operations of the electrical connector but also further enhances the overall impact resistance of the electrical connector and extends the product's service life.

[0038] In this application, the connecting seat 2 is disposed on the rear outer wall 1a of the housing 1, that is, disposed on the side facing away from the user (i.e., the back side). At the same time, the rotation axis of the connecting seat 2 is parallel to the width direction of the housing 1, that is, the rotation axis of the connecting seat 2 is parallel to the horizontal plane and is disposed on the left and right sides.

[0039] In practical use, the accidental pulling of the first electrical connector 32 mainly comes from the rear. When the rotation axis is set along the width direction, the connector 2 can efficiently respond to the pulling force in the front and rear directions, causing the connector 2 to swing up and down around the horizontal axis, thereby guiding the pulling force to the rotation center and eliminating the lever arm. When the first electrical connector 32 and the first wire 31 are in a natural hanging state, gravity will cause the connector 2 to automatically return to the vertical or natural position, avoiding the wire from being in a bent state for a long time. When the rotation axis is along the width direction, the up and down swing of the connector 2 is consistent with the direction of gravity, which is conducive to achieving automatic return.

[0040] In this application, the length direction of the second end of the first wire 31 is perpendicular to the rotation axis of the connector 2, and preferably, the axes of the two intersect. When the first electrical connector 32 is accidentally pulled, the pulling force is mainly transmitted along the length direction of the first wire 31. Since this length direction is perpendicular to the rotation axis, the direction of the pulling force is exactly in the rotation plane of the connector 2. At this time, the torque generated by the pulling force on the rotation axis is the largest, which can trigger the connector 2 to generate a deflection response with the highest efficiency, so that the connector 2 can quickly rotate to the unloading position.

[0041] If the length direction of the first conductor 31 is not perpendicular to the axis of rotation, the tension will be decomposed into two components. One component is used to drive the connecting seat 2 to rotate, and the other component becomes the axial force acting on the connecting seat 2. The axial force component not only cannot help eliminate the bending moment, but may also aggravate the friction or jamming between the connecting seat 2 and the housing 1, reducing the deflection sensitivity. This application converts most or even all of the tension into effective rotational torque by setting it vertically, thereby maximizing the mechanical efficiency.

[0042] This application provides a receiving groove 10 on the rear outer wall of the housing 1, and the connecting seat 2 is disposed in the receiving groove 10. In the retracted state, the connecting seat 2 does not protrude from the rear outer wall of the housing 1.

[0043] Since backpack batteries are often in complex environments during use, if the connector 2 protrudes from the outer surface of the shell, it is easy to be hooked by external objects such as scaffolding or tree branches, resulting in accidental pulling or even damage. This application sinks the connector 2 into the receiving groove 10, so that the rear wall of the shell 1 remains flat or basically flat, which greatly reduces the probability of being hooked.

[0044] Furthermore, when the backpack battery is placed on the ground, the protruding connector 2 is prone to breakage or deformation due to impact. This application provides a receiving groove 10, which provides physical protection for the connector 2. Even if the battery pack is placed with its back facing down, the connector 2 will not directly bear the impact load.

[0045] The lower end of the receiving groove 10 extends downward to the bottom surface of the housing 1, and it can accommodate the naturally hanging first wire 31 or the second wire 41 of the electrical equipment; it can prevent the wires from being bent, squeezed or tangled during storage or use, and ensure that the first wire 31 and the second wire 41 hang naturally along the groove and maintain a straight direction.

[0046] To further improve safety and reliability, this application provides an anti-pull structure in the connector 2. This anti-pull structure can prevent the first electrical connector from transmitting the pulling force to the connection between the first end of the first wire 31 and the battery cell when it is pulled.

[0047] By setting an anti-tension structure inside the connector 2, the first conductor 31 forms a mechanical anchor point inside the connector 2, blocking external tension inside the connector 2 and preventing it from being transmitted to the connection point between the first end of the first conductor 31 and the battery cell. This significantly reduces the risk of fatigue failure at the connection point and ensures the electrical reliability of the battery pack during long-term use. At the same time, after the tension is absorbed by the anti-tension structure, the conductor core of the first conductor 31 no longer bears continuous tensile stress, avoiding cracks or breaks in the core due to metal fatigue.

[0048] Specifically, an L-shaped channel 20 with a right angle or an acute angle is provided in the connector 2, and the first wire 31 is set in the L-shaped channel 20 to form an anti-pull structure. By setting an L-shaped channel 20 with a right angle or an acute angle inside the connector 2 and passing the first wire 31 through it, the anti-pull function is achieved by utilizing the frictional resistance and forced change of direction generated by the wire at the turning point of the channel.

[0049] The L-shaped channel 20 can be integrally formed during the injection molding of the connecting seat 2, without the need for additional parts such as press fittings, screws, or clamps. This not only reduces material costs but also reduces assembly steps, improving production efficiency and product consistency.

[0050] Specifically, when subjected to tension, sliding friction is generated between the outer sheath of the first conductor and the inner wall of the L-shaped channel, consuming part of the tension; the conductor is forced to change direction at right angle or acute angle bends, and the bending resistance at the bend further resists the tension; when the tension increases, the conductor will be pressed more tightly against the corner of the inner wall of the channel at the bend; at the same time, the tension is distributed to multiple inner wall contact surfaces of the L-shaped channel 20, avoiding the tension from being concentrated on a single fixed point.

[0051] In this application, the connector 2 is formed by splicing a first connector 2a and a second connector 2b. An L-shaped arc groove is provided on the opposite surface of the first connector 2a and the second connector 2b. The two arc grooves are spliced ​​together to form an L-shaped channel. During specific assembly, the inner wall of the L-shaped channel is attached to or pressed against the outer wall of the first wire.

[0052] In this embodiment, convex shafts 21 are symmetrically arranged on both sides of the first end (upper end) of the connecting seat 2. At the same time, a shaft hole 100 is provided in the receiving groove 10 on the outer wall of the battery pack body to allow the convex shafts 21 to be inserted and rotated. One end of the convex shaft 21 has a first wire hole 201 through it. The first wire hole 201 is used to allow the first end of the first wire 31 to pass through and extend into the housing. A second wire hole 202 is provided at the second end (lower end) of the connecting seat 2. The axis of the second wire hole 202 is perpendicular to and intersects the axis of the first wire hole. It allows the second end of the first wire 31 to pass through. The first wire 31 located between the first wire hole 201 and the second wire hole 202 is L-shaped and forms an anti-pull structure.

[0053] For ease of description, in this application, the first wire inside the connector 2 is divided into three segments, specifically the first segment 311, the second segment 312, and the third segment 313 connected in sequence. The first segment 311 passes through the first wire hole, the third segment 313 passes through the second wire hole, and the first segment 311 and the third segment 313 are perpendicular to each other. The second segment is arc-shaped, protruding away from the first segment, and forming an acute angle structure with the first segment.

[0054] To further improve the reliability and stability of use, this application provides multiple protrusions on the outer wall of the rear end of the housing 1, thereby forming multiple supports 12. When the back of the battery pack body is placed downwards, the supports 12 can contact the ground and support the battery pack body, thereby creating a gap between the retracted connecting seat 2 and the ground. Through the above arrangement, the connecting seat 2 can be further protected, avoiding wear or deformation due to direct contact with the ground during transportation or placement.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A backpack battery, characterized in that, include: The battery pack body includes a housing and battery cells disposed within the housing. A connecting seat is rotatably mounted on the rear outer wall of the housing. The rotation axis of the connecting seat is parallel to the width direction of the housing. A first wire is provided on the connecting seat. A first end of the first wire extends into the housing and is electrically connected to the battery cells to draw power. A second end of the first wire extends out of the connecting seat and is provided with a first electrical connector at its end. The first electrical connector can be electrically connected to and supply power to an electrical device. When the first electrical connector is subjected to a deflection force, it can drive the connecting seat to rotate relative to the housing and reduce or eliminate the bending moment on the connecting seat. A wearable component, disposed on the battery pack body, is used to carry the battery pack body on the back.

2. The backpack battery as described in claim 1, characterized in that: The length direction of the second end of the first wire is perpendicular to the rotation axis of the connector.

3. The backpack battery as described in claim 1, characterized in that: The outer wall of the rear end of the housing is provided with a receiving groove, and the connecting seat is disposed in the receiving groove. In the retracted state, the connecting seat does not protrude from the outer wall of the rear end of the housing.

4. The backpack battery as described in claim 3, characterized in that: The lower end of the receiving groove extends downward to the bottom surface of the housing and can accommodate the naturally hanging first wire or the second wire of the electrical equipment.

5. The backpack battery as described in claim 1, characterized in that: The connector is equipped with an anti-pull structure, which prevents the tension from being transmitted to the connection between the first end of the first conductor and the battery cell when it is stretched.

6. The backpack battery as described in claim 5, characterized in that: The connector has an L-shaped channel with a right angle or an acute angle, and the first wire is placed in the L-shaped channel to form the anti-pull structure.

7. The backpack battery as described in claim 1, characterized in that: The first end of the connector is provided with symmetrical protruding shafts on both sides. The receiving groove on the outer wall of the battery pack body is provided with shaft holes that allow the protruding shafts to be inserted and rotated. One end of the protruding shaft has a first wire hole through which the first end of the first wire can pass. The second end of the connector is provided with a second wire hole through which the second end of the first wire can pass. The first wire between the first wire hole and the second wire hole is L-shaped.

8. The backpack battery as described in claim 1, characterized in that: The outer wall of the rear end of the housing has multiple protrusions that form a support. When the back of the battery pack body is placed face down, the support can support the battery pack body and create a gap between the folded connector and the ground.

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