WO2022001167A1 - Multifunctional battery pack - Google Patents

Abstract

A multifunctional battery pack, comprising a housing (1), and a cell (2) and a circuit board (3) provided inside the housing (1). A positive electrode of the cell is electrically connected to the circuit board (3) by means of a first electrical connector (4), and a negative electrode of the cell is electrically connected to the circuit board (3) by means of a second electrical connector (5). A first interface (10) is further provided on an end portion of the battery pack. The first interface (10) is electrically connected to the circuit board (3) by means of a third electrical connector (6). The first interface (10) is used for electrically connecting to an external electrical device, such that power of the cell (2) can be supplied to the electrical device through the first interface (10). By means of single-cell battery pack structure design, a battery pack has a simple structure and a small volume, and is suitable for supplying power to a plurality of devices, and pinhole-type wiring terminals are further used to ensure a seal effect of the battery pack; moreover, the use of compact structure design greatly reduces the volume of the entire battery pack, such that the battery pack is widely applicable, and can further be used in devices such as garden tools.

Description

A multifunctional battery pack technical field

The utility model relates to the technical field of battery packs, in particular to a multifunctional battery pack.

Background technique

In order to improve the versatility of the power tool, so that the working range of the power tool is not limited by the position of the socket, many power tools on the market are powered by battery packs. Power tools have the characteristics of easy portability, simple operation and diverse functions, which can greatly reduce labor intensity, improve work efficiency, and realize mechanization of manual operation. Therefore, they are widely used in construction, housing decoration, automobiles, machinery, electricity, bridges, gardening and other fields. , and into the family in large numbers. For power tools, the question of whether the battery pack is suitable or not and whether the assembly is firm is very important for power tools. The existing power tool battery pack installation devices are generally directly fixed on the power tool, so it is not convenient to At the same time, due to the large size of the battery pack, it is not suitable for supplying power to various electric tools, charging and discharging are not convenient enough, and the existing battery pack has a single function and a complex structure.

Utility model content

1. Technical problems to be solved

In view of the above-mentioned defects in the prior art, the utility model proposes a multifunctional battery pack, which solves the problems of complex structure and large volume of the existing battery pack, and also solves the problem that the existing battery pack has a single function and is not suitable for use. for powering multiple devices.

2. Technical solutions

In order to solve the above-mentioned technical problems, the present utility model provides a multifunctional battery pack, comprising a casing, a battery cell and a circuit board built into the casing, and further comprising:

a first electrical connector, which connects one end of the positive and negative electrodes of the battery cell with the circuit board;

a second electrical connector, which connects the other ends of the positive and negative electrodes of the battery cells with the circuit board;

The third electrical connector is disposed on the circuit board and includes at least one first interface, the first interface is used for electrical connection with external electrical equipment, so that the power from the battery can be provided to the electrical equipment through the third electrical connector electrical equipment;

The fourth electrical connector is configured on the circuit board and includes at least one second interface, the second interface is used for electrical connection with external electrical equipment and a charging source, so that power can be provided to the electrical equipment through the second interface ; and can provide electric charge to the battery cell through the second interface.

Wherein, the third electrical connector and the fourth electrical connector are located on the same side or opposite sides of the battery pack.

Wherein, the first interface and/or the second interface extend outward along the axis direction of the positive and negative electrodes of the battery cell.

Wherein, the first electrical connector and the second electrical connector at least include longitudinal bending sections extending along the axis direction of the positive and negative electrodes of the cell.

Among them, the width of the circuit board is Y, and the diameter of the cell is D, where the width Y is 95% of the width D or less.

Wherein, the two ends of the circuit board in the length direction are respectively close to the two ends of the positive and negative electrodes of the cell, and the distances L1 and L2 are respectively set; L1 or L2≦5mm.

Among them, the length of the battery cell is L3, the length of the battery pack is L4, and the length of L4 is 1.3 times or less than that of L3.

Among them, the diameter of the cell is D, the height of the battery pack is M, and M is 1.8 times or less than D.

The battery pack further includes a support frame, the circuit board is fixedly supported on the support frame at intervals, and the minimum distance between the circuit board and the support frame is not greater than 2 mm.

A multifunctional battery pack includes a casing, a battery cell and a circuit board built in the casing,

an input electrical connector configured to be connectable to a charging source such that electrical charge can be supplied to the cell through the input electrical connector to charge the cell;

an output electrical connector configured to be electrically connected to a powered device such that power from the cells can be provided to the powered device through the output electrical connector;

and a case for accommodating battery cells, the length of the case being 130% or less of the length of the battery cell; the length of the battery cell is 70mm.

A multifunctional battery pack includes a casing, a battery cell and a circuit board built in the casing,

an input electrical connector configured to be connectable to a charging source such that electrical charge can be supplied to the cell through the input electrical connector to charge the cell;

an output electrical connector configured to be electrically connected to a powered device such that power from the cells can be provided to the powered device through the output electrical connector;

and a casing for accommodating battery cells, the height of the casing is 180% or less of the diameter of the cell; the diameter of the cell is 21 mm.

A multifunctional battery pack includes a casing, a battery cell and a circuit board built in the casing,

an input electrical connector configured to be connectable to a charging source such that electrical charge can be supplied to the cell through the input electrical connector to charge the cell;

an output electrical connector configured to be electrically connected to a powered device such that power from the cells can be provided to the powered device through the output electrical connector;

The board width is Y, the cell diameter is D, and the width Y is 95% of the width D or less.

A multifunctional battery pack includes a casing, a battery cell and a circuit board built in the casing,

an input electrical connector configured to be connectable to a charging source such that electrical charge can be supplied to the cell through the input electrical connector to charge the cell;

an output electrical connector configured to be electrically connected to a powered device such that power from the cells can be provided to the powered device through the output electrical connector;

Both ends of the circuit board in the length direction are close to the positive and negative poles of the cell, and have spacings L1 and L2; L1 or L2≦5mm.

A multifunctional battery pack includes a casing, a battery cell and a circuit board built in the casing,

an input electrical connector configured to be connectable to a charging source such that electrical charge can be supplied to the cell through the input electrical connector to charge the cell;

an output electrical connector configured to be electrically connected to a powered device such that power from the cells can be provided to the powered device through the output electrical connector;

The battery pack further includes a support frame, the circuit board is fixedly supported on the support frame at intervals, and the minimum distance between the circuit board and the support frame is not more than 2mm.

3. Beneficial effects

Compared with the prior art, the battery pack of the present invention adopts a single-cell battery pack structure design, so that the battery pack structure is simpler and the volume is more compact. Not only makes the battery pack of the present invention suitable for supplying power to a variety of devices, but also ensures the sealing effect of the battery pack through the pinhole terminal; further, the battery pack of the present invention can be used for mobile phones and other mobile phones. the device is charged;

In addition, through the design of the waterproof gasket, the installation gap is completely sealed, and at the same time, it is completely close to the side walls of the third electrical connector and the fourth electrical connector to further ensure the sealing effect. It has the effect of corresponding positioning and installation;

At the same time, the compact structure design greatly reduces the volume of the entire battery pack, making the battery pack applicable to a wider range, including not only cordless hand-held power tools, but also garden tools, cordless vacuum cleaners, DC air compressors, etc. Power operating equipment with batteries as a power source.

Description of drawings

1 is a perspective view of a battery pack of the present invention;

2 is an exploded view 1 of a battery pack of the present invention;

3 is an exploded view 2 of the battery pack of the present invention;

Fig. 4 is the structural diagram of the circuit board of the utility model;

Fig. 5 is the sectional view of the utility model;

Fig. 6 is the directional view of the utility model;

In the figure: 1 is the housing; 2 is the battery core; 3 is the circuit board; 4 is the first electrical connector; 5 is the second electrical connector; 6 is the third electrical connector; 7 is the fourth electrical connector; 8 is the support frame; 9 is the waterproof gasket; 10 is the first interface; 12 is the second interface; 15 is the insulating pad; 16 is the support block; The second opening; 20 is the first casing; 21 is the second casing.

detailed description

The specific embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

Example 1:

A multifunctional battery pack according to an embodiment of the present invention, as shown in FIGS. 1 , 2 , 3 , 4 , 5 and 6 , includes a casing 1 , and batteries 2 and Circuit board 3, which also includes:

a first electrical connector 4, which connects one end of the positive and negative electrodes of the battery cell 2 to the circuit board 3;

The second electrical connector 5 connects the other ends of the positive and negative electrodes of the battery cell 2 with the circuit board 3;

As shown in FIG. 1 , in this embodiment, the third electrical connector 6 is disposed on the circuit board 3 and includes at least one first interface 10 , and the first interface 10 is used for electrical connection with external electrical equipment, so that The power from the battery cell 2 can be provided to the electrical equipment through the third electrical connector; the fourth electrical connector 7 is arranged on the circuit board 3 and includes at least one second interface 12, and the second interface 12 is used for connecting with the external The electrical equipment and the charging source are electrically connected, so that power can be provided to the electrical equipment through the second interface 12; and charge can be supplied to the battery cell 2 through the second interface 12. According to actual product requirements, the third electrical connection can be The device 6 and the fourth electrical connector 7 are arranged on the same side or opposite sides of the battery pack;

In this embodiment, the second interface 12 can be used for both discharging and charging. Specifically, the second interface 12 is a type-C interface, the first interface 10 is a pinhole terminal, and the first interface 10 is used for Power supply for various hand-held power tools, such as cordless vacuum cleaners, DC air compressors and other garden tools, etc., and the use of pinhole terminals can effectively improve the waterproof and sealing effect of the battery pack, and it is more convenient to plug in; the battery of this embodiment The package has a compact structure and can also be used as a mobile power supply. At this time, mobile devices such as mobile phones and tablets can be charged through the second interface 12 using the type-C interface, and the battery cell 2 of the battery pack can also be charged through the type-C interface. to charge.

Specifically, the battery pack in this embodiment further includes a support frame 8, which is used to install the battery cell 2 and the circuit board 3. As shown in FIG. 2, the battery cell 2 adopts a single-section 21700 battery cell, and the support frame 8 The upper part is an arc-shaped groove for setting the battery core 2, and an insulating pad 15 is provided between the support frame 8 and the battery core 2; it can play the role of leakage protection, especially when the skin of the battery core 2 is damaged. , to ensure that no leakage occurs.

In this embodiment, in order to realize that the circuit board 3 is supported on the support frame 8 at intervals, two protruding support blocks 16 are respectively provided on both sides of the bottom of the support frame 8; The two snap-fit buckle plates 17 are used to space the circuit board 3 from the support frame 8 through the support block 16, that is, the stepped support block 16 is used to limit the minimum distance between the circuit board 3 and the support frame 8. The buckle plate 17 is used to fasten and fix the circuit board 3 and the support frame 8; the minimum distance between the circuit board 3 and the support frame 8 is H, and the minimum distance between the circuit board 3 and the support frame 8 is not greater than 2mm. In the example, H=1.57mm; the setting of the minimum distance H can effectively ensure a certain heat dissipation effect between the circuit board 3 and the battery core 2 .

In addition, the width of the circuit board 3 is Y, the diameter of the cell 2 is D, and the width Y is 95% or less of the width D; in this embodiment, the width Y of the circuit board 3 is 20mm, and the diameter D of the cell 2 is 21mm.

In addition, both ends of the circuit board 3 in the length direction are respectively close to the positive and negative ends of the battery cell 2, and the two ends of the circuit board 3 do not exceed the positive and negative ends of the battery core 2. The two ends of the positive and negative electrodes are respectively provided with distances L1 and L2; L1≤5mm, L2≤5mm; in this embodiment, L1=5mm, L2=5mm,

As shown in Figure 5 and Figure 6, the length of the cell 2 is L3, the length of the battery pack is L4, and L4 is 1.3 times or less of L3; the cell diameter is D, the height of the battery pack is M, and M is 1.8 of D times or less; in this embodiment, the length of the battery cell 2 is 70mm, the length of the battery pack is 82mm; the diameter of the battery cell is 21mm, and the height of the battery pack is 36mm; the above-mentioned structure can effectively ensure the battery of this embodiment. The structure of the bag is compact, and when used as a mobile power supply, it is easy to carry, and can be applied to various small electric tools at the same time.

As shown in FIG. 4 , the first interface 10 and/or the second interface 12 extend outward along the axis of the positive and negative electrodes of the battery cell 2 ; the second interface 12 extends outward along the axis of the positive and negative electrodes of the battery cell 2 In other words, the insertion direction of the first interface 10 and the second interface 12 is set along the direction of the longest side of the battery pack, which is more convenient to use.

In this embodiment, the casing 1 is provided with a second opening 19 corresponding to the second interface 12 ; the casing 1 is provided with a first opening 18 corresponding to the first interface 10 ; and the second interface 12 It is arranged side by side with the first interface 10 at the same end of the battery pack, that is, through the setting of the first interface 10 and the second interface 12, the problem of the multi-functional application of the battery pack in this embodiment is realized at the same time, and the overall structure is compact and easy to use. It's simple and convenient.

And there is an installation gap between the third electrical connector 6 and the support frame 8, and an installation gap between the fourth electrical connector 7 and the support frame 8. Specifically, the fourth electrical connector 7 slightly protrudes from the third electrical connector 7. The installation gaps between the electrical connector 6, the third electrical connector 6, the fourth electrical connector 7 and the support frame 8 are sealed by a waterproof gasket 9, and the waterproof gasket 9 is provided with the third electrical connector 6, The slot corresponding to the fourth electrical connector 7, the waterproof gasket 9 is sleeved on the fourth electrical connector 7, and the waterproof gasket 9 is slightly squeezed and deformed between the support frame 8 and the housing 1, and the installation The gap is completely sealed, and at the same time, it is completely in close contact with the side walls of the third electrical connector 6 and the fourth electrical connector 7 to further ensure the sealing effect, and at the same time, the fourth electrical connector 7 has a corresponding positioning and installation effect.

The battery pack in this embodiment is powered by the battery cell 2, and uses a single 21700 battery cell. The suitable power tools are not limited to cordless hand-held power tools, but also garden tools, cordless vacuum cleaners, and DC air compressors. Such as the power operation equipment that uses the secondary battery as the power source; the application range of the battery pack is greatly improved, and the overall structure is simple, and it can also be used as a portable mobile power source, with a small size and stronger functionality.

And the first electrical connector 4 and the second electrical connector 5 at least include a longitudinal bending section extending along the axis of the positive and negative electrodes of the battery cell 2, that is, the first electrical connector 4 and the second electrical connection are bent at a right angle. The device 5 is used to connect the positive and negative electrodes of the battery cell and the circuit board 3 respectively.

Example 2:

Compared with Embodiment 1, in this embodiment, at least two first ports 10 are further provided on the battery pack. The first ports 10 are electrically connected to the circuit board 3 through the third electrical connector 6 , and the first ports 10 can be used In order to be electrically connected with the external electrical equipment and power supply, the power of the battery cell 2 can be provided to the electrical equipment through the first interface 10; The first interfaces 10 are respectively arranged at both ends of the battery pack; wherein the two first interfaces 10 respectively include a pinhole terminal and a USB interface, the setting of the pinhole terminal is the same as that in Embodiment 1, and the USB interface is set On the side opposite the pinhole terminals on the battery pack.

The setting of the USB interface further improves the scope of application of the battery pack in this embodiment when used as a mobile power source.

Example 3:

Compared with Embodiment 1, in this embodiment, the casing 1 includes a first casing 20 for accommodating the battery cell 2 , and at least one second casing 21 , and the second casing 21 is disposed on the battery core 2 . positive and/or negative terminals, and the first casing 20 and the second casing 21 form a closed cavity for accommodating the battery cell 2; specifically, as shown in FIG. 3, in this embodiment, the first casing The body 20 and the second shell 21 respectively have one and only one, the second shell 21 is arranged at the positive or negative end of the battery cell 2, and there is a curved and closed between the first shell 20 and the second shell 21. The separation edge is located in the same plane; and the plane where the separation edge is located is parallel to the plane where the positive electrode and the negative electrode of the cell 2 are located, that is, the edge of the second shell 21 is the separation edge that cooperates with the first shell 20, and the second The plane where the casing 21 is located is perpendicular to the axis direction of the positive and negative electrodes of the battery cell 2, and the first casing 20 is barrel-shaped; The casing 20 has an integrated structure, and the second casing 21 is embedded and fixed at the end of the first casing 20 . Specifically, the first casing 20 and the second casing 21 are fitted with each other through a snap-fit structure. It is clamped and fixed, and the separation edge of the first shell 20 and the second shell 21 is located at the outer end face of the shell 1; the structural side wall of the shell 1 in this embodiment has no visible separation edge, which reflects an integrated design. , it feels better to hold when used as a power bank.

In addition, the first casing 20 and the second casing 21 are sealed and connected by ultrasonic welding, which further improves the overall sealing performance.

Example 4:

Compared with Embodiment 3, in this embodiment, there is one and only one first casing 20 , two second casings 21 , and the second casing 21 is fixed to the first casing by sealing connection. The opposite ends of the body 20 , that is, the first shell 20 is a barrel with two transparent ends, and the two second shells 21 are of the same shape and size, and are sealed and fixed with the two ends of the first shell 20 respectively, and are connected in a sealed manner. The method is ultrasonic welding, which further improves the overall sealing.

Example 5:

Compared with Embodiment 1, the battery pack of this embodiment includes a casing, the battery cells 2 and the circuit board 3 built in the casing 1,

an input electrical connector configured to be connectable to a charging source so that electric charge can be supplied to the battery cell 2 through the input electrical connector to charge the battery cell 2;

an output electrical connector, which is configured to be electrically connected to a powered device, so that power from the cell 2 can be supplied to the powered device through the output electrical connector;

And the case 1 for accommodating the battery cells, the length of the case 1 is 130% or less of the length of the battery cell 2; specifically, the length of the battery cell 2 is 70 mm.

Example 6:

Compared with Embodiment 1, the battery pack of this embodiment includes a casing 1, a battery cell 2 and a circuit board 3 built in the casing 1,

an input electrical connector configured to be connectable to a charging source so that electric charge can be supplied to the battery cell 2 through the input electrical connector to charge the battery cell 2;

an output electrical connector, which is configured to be electrically connected to a powered device, so that power from the cell 2 can be supplied to the powered device through the output electrical connector;

And a case 1 for accommodating the battery cells, the height of the case 1 is 180% or less of the diameter of the cell 2; specifically, the diameter of the cell is 21 mm.

Example 7:

Compared with Embodiment 1, the battery pack of this embodiment includes a casing 1, a battery cell 2 and a circuit board 3 built in the casing,

an input electrical connector configured to be connectable to a charging source so that electric charge can be supplied to the battery cell 2 through the input electrical connector to charge the battery cell 2;

an output electrical connector, which is configured to be electrically connected to a powered device, so that power from the cell 2 can be supplied to the powered device through the output electrical connector;

The width of the circuit board 3 is Y, the diameter of the cell 2 is D, and the width Y is 95% or less of the width D. Specifically, the width Y of the circuit board 3 is 20mm, and the diameter D of the cell 2 is 21mm.

Example 8:

Compared with Embodiment 1, the battery pack of this embodiment includes a casing 1, a battery cell 2 and a circuit board 3 built in the casing 1,

an input electrical connector configured to be connectable to a charging source so that electric charge can be supplied to the battery cell 2 through the input electrical connector to charge the battery cell 2;

an output electrical connector, which is configured to be electrically connected to a powered device, so that power from the cell 2 can be supplied to the powered device through the output electrical connector;

Both ends of the circuit board 3 in the length direction are close to the positive and negative electrodes of the cell, and have spacings L1 and L2; L1 or L2≦5mm; specifically, L1=5mm, L2=5mm.

Example 9:

Compared with Embodiment 1, the battery pack of this embodiment includes a casing 1, a battery cell 2 and a circuit board 3 built in the casing 1,

an input electrical connector configured to be connectable to a charging source so that electric charge can be supplied to the battery cell 2 through the input electrical connector to charge the battery cell 2;

an output electrical connector, which is configured to be electrically connected to a powered device, so that power from the cell 2 can be supplied to the powered device through the output electrical connector;

The battery pack also includes a support frame 8, the circuit board 3 is fixedly supported on the support frame 8 at intervals, and the minimum distance between the circuit board 3 and the support frame 8 is not greater than 2mm; specifically, the minimum distance is 1.57mm;

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (16)

A multifunctional battery pack, comprising a casing (1), a battery cell (2) and a circuit board (3) built in the casing (1), characterized in that it further comprises: a first electrical connector (4), which connects one end of the positive and negative electrodes of the battery cell (2) with the circuit board (3); a second electrical connector (5), which connects the other ends of the positive and negative electrodes of the battery cell (2) with the circuit board (3); The third electrical connector (6) is arranged on the circuit board (3) and includes at least one first interface (10), the first interface (10) is used for electrical connection with external electrical equipment, so that the power from the battery cell (2) can be provided to the electrical equipment through the third electrical connector; A fourth electrical connector (7), which is arranged on the circuit board (3) and includes at least one second interface (12), the second interface (12) is used for connecting with external electrical equipment and a charging source The electrical connection makes it possible to provide electric power to the electrical device through the second interface (12); and to provide electric charge to the battery cell (2) through the second interface (12). The multifunctional battery pack according to claim 1, wherein the third electrical connector (6) and the fourth electrical connector (7) are located on the same side or opposite sides of the battery pack. The multifunctional battery pack according to claim 1, characterized in that: the first interface (10) and/or the second interface (12) are along the axis direction of the positive and negative electrodes of the battery cell (2). Extend outward. The multifunctional battery pack according to claim 1, characterized in that: the first electrical connector (4) and the second electrical connector (5) at least comprise positive and negative electrodes along the battery cell (2) Longitudinal bends extending in the direction of the axis. The multifunctional battery pack according to claim 1, characterized in that: the circuit board (3) has a width Y, and the battery cell (2) has a diameter D, wherein the width Y is 95% of the width D or less. The multifunctional battery pack according to claim 1, characterized in that: both ends of the circuit board (3) in the length direction are respectively close to the positive and negative ends of the battery cell (2), and are respectively provided with a distance L1 and L2; L1 or L2≦5mm. The multifunctional battery pack according to claim 1, characterized in that: the length of the battery cell (2) is L3, the length of the battery pack is L4, and L4 is 1.3 times or less than L3. The multifunctional battery pack according to claim 1, characterized in that: the diameter of the battery cell (2) is D, the height of the battery pack is M, and M is 1.8 times D or less. The multifunctional battery pack according to claim 1, characterized in that: the battery pack further comprises a support frame (8), the circuit board (3) is fixedly supported on the support frame (8) at intervals, and the circuit The minimum distance between the plate (3) and the support frame (8) is not more than 2mm. A multifunctional battery pack, comprising a casing, a battery cell (2) and a circuit board (3) built into the casing (1), and characterized in that it further comprises: an input electrical connector, which is configured to be connectable to a charging source, so that electric charge can be supplied to the battery cell (2) through the input electrical connector to charge the battery cell (2); an output electrical connector, which is configured to be electrically connected to a powered device so that power from the cell (2) can be supplied to the powered device through the output electrical connector; and a casing (1) for accommodating the battery cells, the length of the casing (1) being 130% or less of the length of the battery cell (2). The multifunctional battery pack according to claim 10, wherein the length of the battery cell (2) is 70 mm. A multifunctional battery pack, comprising a casing (1), a battery cell (2) and a circuit board (3) built in the casing (1), and characterized in that it further comprises: an input electrical connector, which is configured to be connectable to a charging source, so that electric charge can be supplied to the battery cell (2) through the input electrical connector to charge the battery cell (2); an output electrical connector, which is configured to be electrically connected to a powered device so that power from the cell (2) can be supplied to the powered device through the output electrical connector; and a casing (1) for accommodating battery cells, the height of the casing (1) being 180% or less of the diameter of the battery cell (2). The multifunctional battery pack according to claim 12, wherein the diameter of the battery cell is 21 mm. A multifunctional battery pack, comprising a casing (1), a battery cell (2) and a circuit board (3) built into the casing, and characterized in that: further comprising: an input electrical connector, which is configured to be connectable to a charging source, so that electric charge can be supplied to the battery cell (2) through the input electrical connector to charge the battery cell (2); an output electrical connector, which is configured to be electrically connected to a powered device so that power from the cell (2) can be supplied to the powered device through the output electrical connector; The width of the circuit board (3) is Y, the diameter of the cell (2) is D, and the width Y is 95% of the width D or less. A multifunctional battery pack, comprising a casing (1), a battery cell (2) and a circuit board (3) built in the casing (1), and characterized in that it further comprises: an input electrical connector, which is configured to be connectable to a charging source, so that electric charge can be supplied to the battery cell (2) through the input electrical connector to charge the battery cell (2); an output electrical connector, which is configured to be electrically connected to a powered device so that power from the cell (2) can be supplied to the powered device through the output electrical connector; Both ends of the circuit board (3) in the length direction are close to the positive and negative electrodes of the cell, and are provided with distances L1 and L2; L1 or L2≦5mm. A multifunctional battery pack, comprising a casing (1), a battery cell (2) and a circuit board (3) built in the casing (1), and characterized in that it further comprises: an input electrical connector, which is configured to be connectable to a charging source, so that electric charge can be supplied to the battery cell (2) through the input electrical connector to charge the battery cell (2); an output electrical connector, which is configured to be electrically connected to a powered device so that power from the cell (2) can be supplied to the powered device through the output electrical connector; The battery pack further comprises a support frame (8), the circuit board (3) is fixedly supported on the support frame (8) at intervals, and there is a minimum distance between the circuit board (3) and the support frame (8). not more than 2mm.

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