WO2020019687A1 - Adapter and portable power supply - Google Patents

Abstract

Disclosed in the present disclosure is an adapter for enabling a battery pack to output an alternating current, the battery pack being able to supply power to at least one power tool, the adapter comprising: a housing including a fitting portion and a first side portion and a second side portion provided on two sides of the fitting portion; an adapter interface provided at the fitting portion to detachably and electrically connect the adapter to the battery pack; at least one output interface used for outputting a current; and a voltage conversion circuit connected between the adapter interface and the output interface, and used for enabling the output interface to at least be able to output a voltage different from the voltage of the battery pack. The housing further includes a first end portion and a second end portion provided at two ends of the fitting portion and located between the first side portion and the second side portion, and ventilation holes in air communication with the interior of the housing are formed on at least one of the first end portion and the second end portion. The adapter of the present disclosure improves the usage rate of the battery pack, has a wide application range, and has high security.

Description

Adapter and portable power Technical field

The present disclosure relates to an adapter and a portable power source including the adapter.

Background technique

With the development of battery technology, power tools are gradually replacing engine tools. In order to achieve a working effect and battery life similar to that of an engine, the rated power and capacity of a battery pack adapted to power a power tool is also increasing.

On the one hand, the battery pack will be idle when no power tools are needed.

On the other hand, in some scenarios, such as working and traveling outdoors, AC power or DC power is often required to power some work or facilities. The traditional portable power supply is powered by its internal battery pack. Once the internal battery pack's power is consumed, it cannot continue to supply power.

Existing adapters are suitable for other batteries with lower output voltages, such as mobile phone batteries and dry batteries; or adapters convert battery power into lower output voltage outputs, such as + 5V. If the adapter is connected to or outputs a large voltage, it will bring security risks.

Summary of the Invention

In order to solve the above technical problems, the present disclosure provides an adapter capable of enabling a battery pack suitable for a power tool to output electric energy and having high safety.

An adapter for enabling a battery pack to output electric energy. The battery pack can supply at least one power tool. The adapter includes: a housing, the housing including a mating portion, and a first side portion and a second side portion provided on both sides of the mating portion. ; An adapter interface is provided at the mating portion so that the adapter can be detachably and electrically connected to the battery pack; at least one output interface is used to output the current; a voltage conversion circuit is connected between the adapter interface and the output interface to enable the output The interface can output at least one voltage different from the voltage of the battery pack; wherein the housing further includes first and second ends provided at both ends of the mating portion and between the first and second sides, At least one of the first end portion and the second end portion is formed with a ventilation hole for air communication with the inside of the housing.

Further, the first end portion is formed with a plurality of first ventilation holes,

The second end portion is formed with a plurality of second ventilation holes,

The total area of the first ventilation hole is smaller than the total area of the second ventilation hole.

Further, the ratio of the total area of the first vent hole to the end surface area of the first end portion ranges from 50% to 90%.

Further, the ratio of the total area of the second vent hole to the end surface area of the second end ranges from 50% to 90%. .

Further, the output interface is located at the one of the first end portion or the second end portion having a larger surface area.

Further, the adapter further includes: a fan, which is disposed on a side of the interior of the housing near the first ventilation hole to accelerate airflow between the first ventilation hole and the second ventilation hole.

Further, the fan turns on when the output power of the adapter is greater than or equal to 100W.

Further, the adapter further includes: a heat sink for dissipating heat from the voltage conversion circuit; and the heat sink is located on a side of the inside of the casing near the second end portion.

Further, the voltage conversion circuit includes: a first voltage conversion circuit for converting the DC power output from the battery pack into AC power; the output interface includes an AC power output interface connected to the first voltage conversion circuit to output AC power.

Further, the voltage conversion circuit includes: a second voltage conversion circuit for causing the battery pack to output a direct current different from the voltage of the battery pack; the output interface includes a direct current output interface connected to the second voltage conversion circuit to output an output voltage lower than the battery pack Voltage of direct current.

Further, the adapting interface includes: an electrical connection terminal, which is electrically connected with the battery cell of the battery pack;

The connection structure is used for connecting the casing and the casing of the battery pack.

Further, the connection structure includes a guide rail for guiding the battery pack to be slidably connected to the other end where the second end portion is located via one end where the first end portion is located.

Further, the adapter further includes a handle, which can be rotated about an axis, and the axis is close to the first end portion.

Further, a locking structure is provided on a side of the adapter near the first end to lock the battery pack and the adapter.

Further, the adapter further includes: a main control switch for turning on or off the electrical connection between the adapter and the battery pack.

Further, the range of the ratio of the adapter's maximum output power to the adapter's reference value is greater than or equal to 0.1w / cm3.

Further, the adapter further includes: a dustproof net, which is disposed inside the casing and is close to the second end portion.

A portable power supply device includes: a battery pack capable of supplying power to at least one electric tool; an adapter for causing electric energy output by the battery pack; wherein the adapter includes a housing, the housing includes a mating portion and is provided on both sides of the mating portion The first side and the second side; an adapter interface is provided at the mating portion so that the adapter can be detachably and electrically connected to the battery pack; at least one output interface is for outputting current; a voltage conversion circuit is connected to the adapter interface And the output interface, so that the output interface can output at least a voltage different from the voltage of the battery pack; wherein, the housing further includes a two-side portion disposed between the first side portion and the second side portion of the mating portion. At least one of the first end portion and the second end portion, the first end portion and the second end portion are formed with ventilation holes for air communication with the inside of the housing.

The adapter of the present disclosure can convert the electric energy of a battery pack suitable for an electric tool into an electric energy with a large output voltage, thereby improving the utilization rate of the battery pack. In addition, the adapter can convert the power of the battery pack into AC power output, which has a wide range of application scenarios, and the adapter has high security.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall structural diagram of a portable power system;

2 is a perspective view of the battery pack in FIG. 1;

3 is a schematic diagram of a combination of an adapter and a battery pack in FIG. 1;

FIG. 4 is a structural view of an adapter of FIG. 1 from a perspective; FIG.

5 is a structural view of the adapter in FIG. 1 from another perspective;

6 is an internal structural diagram of the adapter in FIG. 3;

FIG. 7 is an exploded view of the circuit board, the heat sink, and the connection sheet in FIG. 3; FIG.

8 is a structural diagram of the portable power system in FIG. 1 when it is in a free state;

FIG. 9 is a structural diagram of the portable power system in FIG. 1 when it is in a stationary state; FIG.

10 is a structural diagram of a locking structure of the adapter in FIG. 3;

FIG. 11 is a structural diagram of the locking portion in FIG. 10;

FIG. 12 is a block diagram of an internal circuit of the adapter in FIG. 4.

detailed description

The disclosure will be specifically described below with reference to the drawings and specific embodiments.

Referring to FIG. 1, the portable power device 100 includes: an adapter 200 and a battery pack 300.

The battery pack 300 can supply power to a DC power tool. Specifically, the battery pack 300 includes a battery cell (not shown) and a battery pack case 310, and the battery cell (not shown) is accommodated in the battery pack case 310.

Cells (not shown) are used to store energy, which can be repeatedly charged and discharged. The battery cell (not shown) can be a lithium ion battery or a graphene battery. The battery pack case 310 is used to receive a battery cell (not shown) and other components in the battery pack 300, and the battery pack case 310 is formed with a coupling portion 311 through which the battery pack 300 can be coupled to a power tool .

The battery pack 300 further includes a plurality of electrode connection terminals, which are used at least to electrically connect the battery cell (not shown) with an external circuit. For example, it is electrically connected to a circuit for driving a motor in a power tool or a charging circuit in a charger.

The battery pack 300 may further include other types of connection terminals, such as a communication terminal for communication, and the communication terminal is used to implement signal interaction between the battery pack 300 and a power tool and / or a charger.

In addition, the battery pack 300 also includes a circuit board 225, a controller, and some corresponding detection modules. The circuit board 225 is mainly used for constructing internal circuits of the battery pack 300, and electronic components for implementing various electrical functions are installed and connected thereto. The controller is mainly used to control the battery pack 300, and the detection module is mainly used to detect some electrical parameters and physical parameters of the battery pack 300, such as the current, voltage, or temperature of a battery cell (not shown) of the battery pack 300. Specifically, the circuit formed by the circuit board 225, the controller, and the detection module enables the battery pack 300 to be over-discharged or over-charged, and enables the battery pack 300 to perform limited or wireless communication with other external devices.

The rated voltage of the battery pack 300 is 30V or more and 350V or less. More specifically, the rated voltage of the battery pack 300 ranges from 30V to 50V, 50V to 85V, 85V to 100V, 100V to 200V, or 200V to 350V. As one embodiment, the rated voltage of the battery pack 300 is 56V.

The weight of the battery pack 300 is 1 kg or more and 10 kg or less. More specifically, the weight of the battery pack 30020 ranges from 1kg to 2kg, 2kg to 2.5kg, 2.5kg to 3kg, 3k to 4kg, 4kg to 5kg, 5kg to 6kg, 6kg to 7kg, 7kg to 8kg, 8kg to 9kg, 9kg to 10kg.

Referring to FIG. 1, the battery pack 300 further includes a power display unit 320 for displaying the remaining power of the battery pack 300. Specifically, the power display unit 320 is telecommunication-connected to the connection terminals of the circuit board 225 and the battery pack 300, respectively. As a specific implementation manner, the power display unit 320 is disposed on an upper surface of the battery pack 300.

The adapter 200 can be combined with the battery pack 300 described above, so that the battery pack 300 can output AC power and / or DC power through the adapter 200.

The adapter 200 includes a housing 210 that can form a mating portion 212 that is a portion that fits the coupling portion 311 of the battery pack 300 to detachably connect the battery pack 300 to the adapter 200.

For the convenience of explanation, referring to FIG. 1, based on the perspective view of the portable power device 100 when placed, the directions of “up, down, front, back, left, and right” are illustrated and specified. That is, as shown in FIG. 1, when the portable electric power device 100 is placed on a plane, the surface of the adapter 200 in contact with the plane is defined as the lower surface of the adapter 200, and the other surface opposite to the lower surface of the adapter 200 is defined as the upper surface of the adapter 200. The surface of the battery pack 300 in contact with the plane is defined as the lower surface of the battery pack 300, and the other surface opposite to the lower surface of the battery pack 300 is defined as the upper surface of the battery pack 300.

Referring to FIG. 12, the adapter 200 further includes a first voltage conversion circuit 270 and a second voltage conversion circuit 271 disposed in the housing 210. The first voltage conversion circuit 270 is configured to convert the DC power output from the battery pack 300 into an AC power output. In some embodiments, the first voltage conversion circuit 270 is an inverter circuit, and can convert the DC power output from the battery pack 300 into an AC power output of 110-130V. In some embodiments, the first voltage conversion circuit 270 can convert the DC power output from the battery pack 300 into an AC power output of 210-230V. In some specific implementation manners, the first voltage conversion circuit 270 can convert the DC power output from the battery pack 300 into an AC power output of 110-130V and can also convert the DC power output by the battery pack 300 into an AC power output of 210-230V.

The second voltage conversion circuit 271 converts the DC power output from the battery pack 300 into a DC power output with a certain voltage. In some embodiments, the second voltage conversion circuit 271 is a rectifier circuit, and the second voltage conversion circuit 271 can convert the DC power output from the battery pack 300 into a + 5V DC power output. In some embodiments, the second voltage conversion circuit 271 can convert the DC power output from the battery pack 300 into a + 12V DC power output. In other embodiments, the second voltage conversion circuit 271 can convert the DC power output from the battery pack 300 into a + 19V DC power output.

The adapter 200 further includes an AC power output interface 220 for outputting AC power, so that the portable power device 100 can be used as an AC power source. The AC power output interface 220 is electrically connected to the first conversion circuit to output AC power. In some embodiments, the AC power output interface 220 is configured in the form of a power socket as shown in FIG. 4. The power socket is designed to have the same specifications as the socket for power output by the local general power grid, so that the portable power system can be used for general AC. Powered by electrical equipment. In some embodiments, the adapter 200 includes an AC power output interface 220 for outputting 110-130V AC power or 210-230V AC power. In some embodiments, the adapter 200 includes two AC power output interfaces 220 for outputting 110-130V AC power or 210-230V AC power, respectively. In some embodiments, the AC power output interface 220 is disposed on the lower surface of the adapter 200.

The adapter 200 further includes a direct current power output interface 221 for causing the adapter 200 to output direct current. In some embodiments, the DC output interface 221 may be configured as a + 5V USB interface as shown in FIG. 1. In some embodiments, the DC power output interface 221 may also be configured in other forms, such as a 12V vehicle power interface, an interface that outputs 19V, 36V and other voltages. As a specific embodiment, the voltage of the DC power output interface 221 should be lower than the rated voltage of the battery pack 300.

The ratio of the maximum output power of the adapter 200 to the weight of the adapter 200 ranges from 0.03 w / g or more.

The range of the ratio of the maximum output power of the adapter 200 to the volume of the adapter 200 is 0.1w / cm3 or more. Further, the range of the ratio of the maximum output power of the adapter 200 to the volume of the adapter 200 is greater than or equal to 0.2 g / cm3.

The ratio of the rated voltage of the battery pack 300 to the maximum output power of the adapter 200 ranges from 0.07v / w to 16v / w. Specifically, the ratio of the rated voltage of the battery pack 300 to the maximum output power of the adapter 200 ranges from 0.07v / w to 0.67v / w, 0.07v / w to 0.33v / w, 0.15v / w to 0.67v. / w, 0.15v / w ～ 0.33v / w.

The projection area of the adapter 200 in the left-right direction is smaller than the projection area of the battery pack 300 in the left-right direction.

As shown in FIGS. 2 and 3, the adapter 200 includes an adapter interface 211, which is disposed on the left surface of the housing 210 so that the adapter 200 and the battery pack 300 are detachably connected.

The adapter 200 includes electrical connection terminals 222 and a connection structure 223. The electrical connection terminal 222 is used to connect to a corresponding terminal in the battery pack 300, so that the adapter 200 and the battery pack 300 are electrically connected to transmit electric energy and / or signals. In some embodiments, the electrical connection terminals are respectively connected to the positive and negative terminals of the battery pack 300, and they are electrically connected to at least the first voltage conversion circuit 270 and / or the second voltage conversion circuit 271 in the adapter 200. The electrical connection terminal is connected to a signal terminal of the battery pack 300 as a signal terminal to transmit a signal.

Referring to FIG. 3 to FIG. 5, in some specific embodiments, the electrical connection terminal 222 is fixedly mounted on the connection piece 261 support with a connection piece structure, and the connection piece support 224 and the PCB are fixed by screws. The solder pin ends of the electrical connection piece 261 are soldered on the PCB. The advantage of this is that before the electrical connection piece 261 is welded to the PCB, the connection piece 261 bracket is fixed to the PCB board by screws, which ensures the welding accuracy of the connection piece 261 bracket and avoids the deviation of the connection piece 261 bracket that may be caused during welding. . The electrical connection terminal 222 is welded on the PCB board through a welding end bracket in the form of an electrical connection piece 261, which saves the internal space of the adapter 200 and makes the product structure of the adapter 200 more compact. In some embodiments, in order to further improve the welding accuracy and increase the stress capacity of the welding end of the electrical connection piece 261, the solder leg end of the electrical connection piece 261 and the PCB are welded in two rows.

The connection structure 223 is used to connect the battery pack case 310 and the case 210. In some specific embodiments, the connection structure includes two guide rails 226. The guide rail 226 can guide the battery pack 300 so that the battery pack 300 is slidably connected from one end to the other end of the adapter 200. The guide rails 226 are respectively formed on two sides of a convex block protruding forward from the opposite periphery, and the electrical connection terminals are disposed on the upper end of the convex block 227. The convex block includes two parts distributed left and right: a guide rail portion and a boss portion. The guide rail 226 is formed on the front and rear sides of the guide rail 226 portion, and the convex portion further protrudes to the left from the guide rail 226 portion.

Referring to FIGS. 1 to 5, the coupling portion 311 of the battery pack 300 is formed with a groove 331 capable of cooperating with the bump, and an electrical interface of the battery pack 300 is provided in the groove. The electrical interface includes a terminal interface. The electrical connection terminals of the adapter 200 may be electrically connected to terminals inside the battery pack 300 by inserting corresponding terminal interfaces. Guiding structures that cooperate with the guide rail 226 are respectively provided on both sides of the groove.

The battery pack 300 can be inserted into the adapter 200 substantially along the direction shown in FIG. 2. The cooperation of the guide rail 226 with the guide structure and the cooperation of the projections and grooves limit the movement of the battery pack 300 relative to the adapter 200 in the left-right and front-rear directions. Therefore, the adapter 200 needs to limit the battery pack 300 in the up-down direction so that the battery pack 300 and the adapter 200 form a whole.

Referring to FIGS. 10 and 11, the adapter 200 further includes a locking structure 233 for limiting the battery pack 300 in the plugging / removing direction (ie, the up-down direction) to lock the battery pack 300 and the adapter 200 so that the two constitute A whole. In some embodiments, the locking structure 233 is disposed on the same plane as the plane where the electrical connection terminals of the adapter 200 are located. More specifically, the locking structure 233 is disposed above the electrical connection terminal. The locking structure 233 cooperates with the slot of the battery pack 300 to lock the battery pack 300 in the up-down direction and ensure that the terminals of the adapter 200 and the battery pack 300 are well connected.

The locking structure 233 includes an elastic member 234, a locking member 235, and a fixing member 236. The elastic member 234 is disposed on the back of the housing 210 near the upper surface. The elastic member 234 is compressed or ejected in the front-rear direction. In some specific embodiments, the elastic member 234 is a spring. In other specific embodiments, the elastic member 234 may also be made of a flexible material with elasticity. The fixing member 236 is located in the casing and is fixedly connected to the casing.

The locking member 235 protrudes at least partially from the housing 210. For convenience of description, one end of the locking member 235 connected to the elastic member 234 is defined as a fixed end, and the other end protruding from the housing 210 is an elastic end. Specifically, the plane of the elastic end includes an elastic inclined plane 237, an elastic plane 238, and an elastic arc surface 239. Among them, in the up-down direction, the elastic inclined surface 237 is close to the upper end of the housing 210, and the elastic plane 238 is located between the elastic inclined surface 237 and the elastic curved surface 239. When the adapter 200 is coupled to the battery pack 300 in the insertion direction shown in FIG. 3, the elastic member 234 is compressed in the front-rear direction so that the locking member 235 is coupled to the card slot of the battery pack 300 to lock the adapter 200 with the battery pack 300.

This has the advantage that when the adapter 200 is coupled to the battery pack 300 in the insertion direction of the direction shown in FIG. 3, the elastic inclined surface 237 near the upper end of the housing 210 first contacts the card groove of the battery pack 300, and the setting capability of the elastic inclined surface 237 is It is ensured that the adapter 200 is smoothly coupled to the battery pack 300 to improve the user experience. The arrangement of the elastic curved surface 239 increases the damping between the elastic member 234 and the clamping slot of the battery pack 300, and prevents the adapter 200 from being separated from the battery pack 300 in the case of non-human removal.

Referring to FIGS. 8 and 9, the adapter 200 further includes a handle 240 for a user to hold. The handle 240 includes a supporting member 242 disposed on a front surface and a rear surface of the housing 210 and a carrying member 241 between the two supporting members 242, respectively. The centerline of the support 242 in the width direction of the front surface thereof is defined as the handle centerline 101. Among them, the handle 240 has a first position (shown in FIG. 8) in which the entirety of the battery pack 300 and the adapter 200 is in a free state, and a second position (shown in FIG. 9) in which the entirety of the battery pack 300 and the adapter 200 is at rest.示). The free state refers to a state where the adapter 200 and the battery pack 300 as a whole are balanced when the user carries the handle 240. The stationary state refers to a state when the adapter 200 and the battery pack 300 as a whole are placed on a stationary plane.

When the handle 240 is in the first position, the center of gravity of the adapter 200 is located on one side of the handle centerline 101. Specifically, when the handle 240 is located in the first position, the center of gravity of the adapter 200 is located on the side of the handle centerline 101 near the second end. When the handle 240 is located at the first position, the range of the distance between the center of gravity of the adapter 200 and the center line 101 of the handle is 6 cm or less. Specifically, when the handle 240 is located at the first position, the range of the distance between the center of gravity of the adapter 200 and the center line 101 of the handle is 4 cm or less. When the handle 240 is in the first position, the range of the distance between the center of gravity of the adapter 200 and the center line 101 of the handle is 3 cm or less.

When the handle 240 is located at the first position, the range of the ratio of the distance between the center of gravity O1 of the adapter 200 and the handle centerline 101 to the weight of the battery pack 300 is 0.04 cm / kg or less. Further, when the handle 240 is located at the first position, the range of the ratio of the distance between the center of gravity O1 of the adapter 200 and the center line 101 of the handle 200 to the weight of the battery pack 300 is 0.03 cm / kg or less.

Such a design makes it convenient for the user to carry the whole of the adapter 200 and the battery pack 300 and maintain the relative stability of the whole during the carrying process.

When the handle 240 is in the second position, the upper surface portion of the carrying member 241 exceeds the plane on which the upper surface of the battery pack 300 is located. This can make the overall structure of the adapter 200 and the battery pack 300 more compact, which facilitates assembly and storage.

The handle 240 can be rotated about an axis, and the projection point of the axis on the front surface of the housing 210 is defined as the center point O, and the distance from the center point O to the end plane (that is, the upper surface of the housing) where the first end face of the housing 210 is located. The value range is 8 cm or less. Specifically, the range of the distance from the center point O to the plane on which the end surface of the first end surface of the housing 210 is located is 6 cm or less. More specifically, the range of the distance from the center point O to the plane on which the upper surface of the housing 210 is located is 5 cm or less. The handle 240 can be rotated about an axis that is close to the upper surface of the housing 210.

The supporting member 242 is a retractable supporting member, and the carrying member 241 is an elastic carrying member. The supporting member 242 has a gear adjustment function when rotating.

In some embodiments, the housing 210 further includes an adapting portion 200 and first and second side portions 218 and 219 disposed on both sides of the adapting portion, and disposed on both ends of the adapting portion and located on the first side portion. A first end portion 213 and a second end portion 214 between 218 and the second side portion 219. At least one of the first end portion 213 and the second end portion 214 is formed with a ventilation hole in air communication with the inside of the housing. Specifically, referring to FIGS. 1, 4 and 5, the first end portion 213 is an upper end portion, and the second end portion 214 is a lower end portion.

The first end portion 213 is formed with a plurality of first ventilation holes 215, and the second end portion 214 is formed with a plurality of second ventilation holes 216. In some embodiments, the ratio of the total area of the first ventilation hole 215 to the end surface area of the first end portion 213 ranges from 50% to 90%. Further, the ratio of the total area of the first vent hole 215 to the end surface area of the first end portion 213 ranges from 55% to 85%. Further, the ratio of the total area of the first vent hole 215 to the end surface surface area of the first end portion 213 ranges from 60% to 80%. Further, the ratio of the total area of the first ventilation hole 215 to the end surface surface area of the first end portion 213 ranges from 65% to 80%. Further, the ratio of the total area of the first ventilation hole 215 to the end surface area of the first end portion 213 ranges from 60% to 70%. This can ensure that a large ventilation area is formed on the first end surface to facilitate circulation.

In some embodiments, the ratio of the total area of the second vent hole 216 to the end surface area of the first end portion 213 ranges from 50% to 90%. Further, the ratio of the total area of the second ventilation hole 216 to the end surface area of the first end portion 213 ranges from 55% to 85%. Further, the ratio of the total area of the second vent hole 216 to the end surface area of the first end portion 213 ranges from 60% to 80%. Further, the ratio of the total area of the second vent hole 216 to the end surface area of the first end portion 213 ranges from 65% to 75%. In some embodiments, the AC power output interface 220 and the DC power output interface 221 are both located at the second end portion 214.

When the adapter is in operation, air flows through the second ventilation hole 216 into the interior of the casing and flows along the longest path inside the casing, and then exits through the second ventilation hole 216. According to this design, while ensuring the maximum air intake of the adapter, it is ensured that the airflow can flow along the maximum length of the casing to take away the heat of the components inside the adapter with maximum efficiency, which improves the heat dissipation efficiency.

The adapter includes a dustproof net 217 for preventing dust from entering. Referring to FIG. 6, the dustproof net 217 is disposed inside the housing and is close to the second end portion 214.

The adapter 200 also includes a fan 250 that works to accelerate cooling of components inside the adapter 200, such as a circuit board 225, electronic components, and the like. The fan 250 is disposed inside the casing 210. In some embodiments, the fan 250 is disposed on the side of the housing 210 near the AC power interface. In some embodiments, the adapter 200 includes two fans 250, which are respectively arranged side by side inside the housing 210 and close to the first ventilation hole 215. The fan 250 is disposed opposite the first ventilation hole 215. The external air flows into the housing 210 through the second ventilation hole 216 under the acceleration of the fan 250, flows through the circuit board 225, the heat sink 252, and the like and then flows out through the first ventilation opening 215, thereby taking away the heat inside the adapter 200 to Achieve cooling effect.

When the output power of the adapter 200 is 100 W or more, the fan 250 is turned on to reduce the energy loss of the battery pack 300.

As another embodiment, a battery pack protection circuit is provided in the adapter 200.

Referring to FIGS. 6 and 7, a circuit board 225 is provided in the housing 210, and the semiconductor device 263 is connected to the circuit board 225. In some embodiments, the first voltage conversion circuit 270 and the second voltage conversion circuit 271 are disposed on the same circuit board 225. In other embodiments, the first voltage conversion circuit 270 and the second voltage conversion circuit 271 are respectively disposed on different circuit boards 225. Specifically, the semiconductor device 263, such as a power switch, is disposed on the circuit board 225, and the heat sink 252 is used to dissipate heat to the semiconductor device 263. In order to make the structure of the adapter 200 as compact as possible, a horizontal profile heat sink 252 is used to dissipate heat from the semiconductor device 263. The connection piece 261 is fixed between the circuit board 225 and the heat sink 252. The connection piece 261 includes a connection through hole and a connection solder pin. The connection through hole, the device through hole on the semiconductor device 263, and the through hole on the circuit board 225 are correspondingly arranged. The screws pass through the connection through hole, the device through hole, The through holes of the circuit board 225 and the through holes of the heat sink 252 allow the heat sink 252, the semiconductor device 263, and the connection sheet 261 to be fixed on the circuit board 225. The connection pads are soldered on the circuit board 225 to make the connection piece 261 more securely fixed, thereby ensuring that the heat sink 252 is reliably fixed on the circuit board 225. The influence of the unstable fixing of the heat sink which may exist in the prior art on the circuit performance is avoided.

The adapter 200 further includes a main control switch 262 for turning on or off the electrical connection between the adapter 200 and the battery pack 300. After the battery pack 300 is coupled to the adapter 200, the user presses the main control switch 262 to turn on the electrical connection between the adapter 200 and the battery pack 300. More specifically, after the user presses the main control switch 262, the electrical connection between the adapter 200 and the battery pack 300 is turned on, and the power display unit 320 of the battery pack 300 is activated to display the remaining power of the battery pack 300, which is convenient for the user Observe. In some embodiments, the main control switch 262 may be a key switch, a touch screen switch, or a gear switch.

The basic principles, main features, and advantages of the present disclosure have been shown and described above. Those skilled in the art should understand that the above embodiments do not limit the disclosure in any form, and that any technical solution obtained by means of equivalent replacement or equivalent transformation falls within the protection scope of the disclosure.

Industrial applicability

The present disclosure provides an adapter and a portable power source, which can be used to convert the battery pack power of an electric tool into a power output with a large output voltage, thereby improving the utilization rate of the battery pack. In addition, the adapter can convert the power of the battery pack into AC power output, which has a wide range of application scenarios, and the adapter has high security.

Claims (16)

An adapter for enabling a battery pack to output electrical energy. The battery pack can provide power to at least one power tool. The adapter includes: A housing, the housing comprising a mating portion and a first side portion and a second side portion provided on both sides of the mating portion; An adapting interface, which is provided at the mating portion so that the adaptor can be detachably and electrically connected to the battery pack; A voltage conversion circuit connected between the adapter interface and the output interface, for enabling the output interface to output at least a voltage different from the voltage of the battery pack, the voltage conversion circuit including a first voltage conversion circuit, For converting the direct current output from the battery pack into alternating current; At least one output interface for outputting current, the at least one output interface including an AC power output interface connected to the first voltage conversion circuit to output AC power; among them, The housing further includes a first end portion and a second end portion provided at both ends of the mating portion and between the first side portion and the second side portion. At least one of the second end portions is formed with a ventilation hole in air communication with the interior of the housing. The adapter according to claim 1, wherein: The ventilation hole includes a first ventilation hole formed on the first end portion, and A second ventilation hole formed on the second end, The total area of the first ventilation holes is less than or equal to the total area of the second ventilation holes. The adapter according to claim 2, wherein: A ratio of a total area of the first ventilation hole to an end surface area of the first end portion ranges from 50% to 90%. The adapter according to claim 2, wherein: The ratio of the total area of the second ventilation hole to the end surface area of the second end ranges from 50% to 90%. The adapter according to claim 1, wherein: The output interface is located in one of the first end portion or the second end portion having a larger surface area. The adapter according to claim 2, wherein: The adapter further includes: A fan is disposed on a side of the interior of the casing near the first ventilation hole to accelerate airflow between the first ventilation hole and the second ventilation hole. The adapter according to claim 6, wherein: The fan is turned on when the output power of the adapter is greater than or equal to 100W. The adapter according to claim 1, wherein: The adapter further includes: A heat sink for dissipating heat from the voltage conversion circuit; The heat sink is located on a side of the inside of the casing near the second end portion. The adapter according to claim 1, wherein: The voltage conversion circuit further includes: A second voltage conversion circuit for causing the battery pack to output a direct current different from the voltage of the battery pack; The output interface includes: The direct current output interface is connected to the second voltage conversion circuit to output direct current having an output voltage lower than the voltage of the battery pack. The adapter according to claim 1, wherein: The adaptation interface includes: An electrical connection terminal, which is electrically connected to a battery cell of the battery pack; A connection structure for connecting the casing and the casing of the battery pack; The connection structure includes: The guide rail is used for guiding the battery pack to be slidably connected to the other end where the second end portion is located through one end where the first end portion is located. The adapter according to claim 1, wherein: The adapter further includes: A handle that is rotatable about an axis, the axis being close to the first end. The adapter according to claim 1, wherein: The adapter further includes: A locking structure is provided on a side of the adapting portion near the first end portion to lock the battery pack and the adapter. The adapter according to claim 1, wherein: The adapter further includes: A main control switch is used to turn on or off the electrical connection between the adapter and the battery pack. The adapter according to claim 1, wherein: The range of the ratio of the maximum output power of the adapter to that of the adapter is greater than or equal to 0.1 w / cm3. The adapter according to claim 1, wherein: The adapter further includes: A dustproof net is disposed inside the casing and is close to the second end portion. A portable power supply includes: A battery pack capable of powering at least one power tool; An adapter for enabling electrical energy output by the battery pack; The adapter includes: A housing, the housing comprising a mating portion and a first side portion and a second side portion provided on both sides of the mating portion; An adapting interface, which is provided at the mating portion so that the adaptor can be detachably and electrically connected to the battery pack; A voltage conversion circuit connected between the adapter interface and the output interface, for enabling the output interface to output at least one voltage different from the voltage of the battery pack, the voltage conversion circuit including a first voltage conversion A circuit for converting a direct current output from the battery pack into an alternating current; At least one output interface for outputting current, the at least one output interface including an AC power output interface connected to the first voltage conversion circuit to output AC power; among them, The housing further includes a first end portion and a second end portion provided at both ends of the mating portion and between the first side portion and the second side portion. At least one of the second end portions is formed with a ventilation hole in air communication with the interior of the housing.

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