CN113991786A - Battery pack, electric tool, charger, communication method of battery pack, electric tool and charger - Google Patents

Abstract

The application provides a battery package, electric tool, charger and battery package, electric tool, communication method of charger, through set up first light generator and first light reception on the battery package and come as its information interaction passageway, can avoid like this laying wire at current battery package communication port, still need not to do waterproof design simultaneously. Furthermore, through the corresponding setting on electric tool and charger second light receiver and second light generator and third light receiver and third light generator can realize like this that the battery package all can give through continuous acceptance light signal and sending light signal electric tool and charger carry out the information interaction with it in discharging process and charging process, and this kind of communication method can not lead to the problem that the communication is not smooth and easy because of factors such as external contact failure and waterproof, can reduce its requirement to service environment to adapt to more use scenes.

Description

Battery pack, electric tool, charger, communication method of battery pack, electric tool and charger

Technical Field

The invention relates to the technical field of electric tools, in particular to a battery pack, an electric tool, a charger and a communication method of the battery pack, the electric tool and the charger.

Background

Along with the development of intellectualization and the internet, more and more manual labor is replaced by intelligent products, and the use of electric tools is more and more extensive, such as electric garden tools like lawn mowers and pruners, and electric operation machines like electric drills and bolt cutter bars, the electric tools of the type all use a battery pack as a power element, the universality of the battery pack is improved, and the electric tools are adapted to various types of electric tools, and are problems to be solved by each manufacturer. Basically, the battery pack is detachably connected with the electric tool or the charger, so that the idle rate of the battery pack is reduced, and the universality of the battery pack is improved.

When a battery pack in the current market is matched with an electric tool, the battery pack comprises a positive terminal and a negative terminal which are connected for power supply, and is also provided with a communication terminal which is used as a bridge for communication between the battery pack and a charger or the electric tool, information is sent to the electric tool or the charger through the communication terminal, the electric tool or the charger controls discharging or charging according to the information, connecting wires are required to be arranged between the electric tool and the battery pack and between the battery pack and the electric tool, and the communication stability between the electric tool and the battery pack and between the battery pack and the electric tool can be ensured only by adopting a waterproof design.

Disclosure of Invention

The invention aims to provide a battery pack, an electric tool, a charger and a communication method of the battery pack, the electric tool and the charger, so as to solve the technical problem that the structure is complicated because signal transmission in the charging and discharging processes of the conventional battery pack is realized through an electric connection port and further a waterproof design is required to be carried out on the electric connection port.

In order to achieve the above object, the present application provides a battery pack, which includes a battery cell and a battery housing, wherein the battery cell is disposed in the battery housing, and the battery housing is further provided with a first light receiver and a first light generator. The first optical receiver is used for sending the working parameters of the battery cell to an electric tool or a charger, and the first optical receiver is used for receiving instruction signals of the electric tool or the charger for calling the working parameters of the battery cell.

Optionally, in the battery pack, the first light generator is configured to emit visible light or invisible light.

Optionally, in the battery pack, when the light generated by the first light generator is visible light, a first illuminating lamp is provided on the battery pack as the first light generator.

Optionally, in the battery pack, the first illuminating lamp is disposed on the battery pack, the battery pack further includes a first light guide column, one end of the first light guide column is connected to the first illuminating lamp, and the other end of the first light guide column is close to the first light receiver.

Optionally, in the battery pack, when the first light generator emits invisible light, the first light generator is an infrared light generator.

In another aspect, the present application also provides a power tool including:

the battery pack described above;

the tool shell comprises a mounting groove, and a second light receiver and a second light generator are arranged in the mounting groove;

the battery pack is arranged in the mounting groove and forms a first communication channel with the mounting groove; and the first light receiver, the first light generator, the second light receiver, and the second light generator are all located within the first communication channel;

wherein the first light generator is communicatively coupled to the second light receiver and the second light generator is communicatively coupled to the first light receiver;

the second controller is arranged in the tool shell and is in communication connection with the second light receiver and the second light generator; the second controller controls a second light generator to emit light signals containing instructions for calling parameters of the battery pack, the first light receiver receives the light signals, the first light generator emits light signals containing parameters of the battery pack according to the light signals, and the second light receiver receives the light signals containing the parameters of the battery pack.

Optionally, in the electric power tool, along a length direction of the first communication channel, a shortest distance between the first light receiver and the second light generator and a shortest distance between the first light generator and the second light receiver are not greater than 1 mm.

Optionally, in the power tool, when both the first light generator and the second light generator emit visible light; the electric tool further comprises a second illuminating lamp and a second light guide column, one end of the second light guide column is connected with the second illuminating lamp, and the other end of the second light guide column is located in the first communication channel.

Optionally, in the power tool, when both the first light generator and the second light generator emit invisible light; the first light generator and the second light generator are both infrared generating devices.

In another aspect, the present application further provides a charger for charging the battery pack, which is characterized by including a charging slot, wherein the battery pack is disposed in the charging slot, and the battery pack and the charging slot form a second communication channel; the charger further comprises a third light receiver and a third light generator;

and wherein the first light receiver, the first light generator, the third light receiver, and the third light generator are all located within the second communication channel;

wherein the first light generator is communicatively coupled to the third light receiver, and the third light generator is communicatively coupled to the first light receiver;

the third optical transmitter transmits an optical signal containing a command for calling the parameters of the battery pack, the first optical receiver receives the optical signal, the first optical generator transmits the optical signal containing the parameters of the battery pack according to the optical signal, and the third optical receiver receives the optical signal containing the parameters of the battery pack.

Optionally, in the charger, along a length direction of the second communication channel, a shortest distance between the first light receiver and the third light generator and a shortest distance between the first light generator and the third light receiver are not greater than 1 mm.

Optionally, in the charger, when both the first light generator and the third light generator emit visible light; the charger further comprises a third illuminating lamp and a third light guide column, one end of the third light guide column is connected with the third illuminating lamp, and the other end of the third light guide column is located in the second communication channel.

Optionally, in the charger, when both the first light generator and the third light generator emit invisible light; the first light generator and the third light generator are both infrared generating devices.

In another aspect, the present application further includes a communication method of a battery pack, providing the above battery pack;

the method comprises the following steps:

the method comprises the following steps: receiving an optical signal containing a command for calling parameters of a battery pack;

step two: converting the optical signal containing the command for calling the parameter of the battery pack into a corresponding electrical signal containing the command for calling the parameter of the battery pack;

step three: sending an optical signal which contains an electric signal for calling the parameter of the battery pack and is required to call the parameter of the battery pack;

and repeatedly and circularly executing the step one to the step three.

Optionally, before the step one, the communication method of the battery pack further includes the following steps:

receiving an optical signal containing an activation instruction;

modulating the optical signal containing the activation instruction into a corresponding electrical signal containing the activation instruction;

the battery pack is initialized based on the electrical signal containing the activation command.

Optionally, before performing step three, the communication method for the battery pack further includes the following steps:

and judging whether the electric signal containing the command for calling the parameter of the battery pack is correct or not, if so, executing the step three, and if not, judging whether the battery pack enters a standby dormant state or not.

Optionally, in the communication method of the battery pack, the parameters include protection parameters of the battery pack and real-time operating parameters of the battery pack.

Optionally, in the communication method of the battery pack, the protection parameter of the battery pack is a discharge protection parameter or a charge protection parameter.

In still another aspect, the present application further provides a communication method for an electric tool, providing an electric tool as described above; the method comprises the following steps:

the method comprises the following steps: transmitting an optical signal containing a command for calling the parameter of the battery pack;

step two: receiving an optical signal containing the battery pack parameters required to be called by the optical signal in the step one;

step three: modulating the received optical signal in the second step into a corresponding electric signal containing the battery pack parameters required to be called by the optical signal in the first step;

and repeatedly and circularly executing the step one to the step three.

Optionally, after the step three, the communication method of the power tool further includes the following steps:

and (4) judging whether the electric signal of the battery pack parameter required to be called by the optical signal in the step one is normal, if so, executing the step one, and if not, finishing the work of the electric tool.

Optionally, in the communication method of the electric power tool, the battery pack parameters include battery pack discharge protection parameters and real-time operating parameters.

On the other hand, the application also provides a communication method of the charger, and provides the charger; the method comprises the following steps:

the method comprises the following steps: transmitting an optical signal containing a command for calling the parameter of the battery pack;

step two: receiving an optical signal containing the battery pack parameters required to be called by the optical signal in the step one;

step three: modulating the received optical signal in the second step into a corresponding electric signal containing the battery pack parameters required to be called by the optical signal in the first step;

and repeatedly and circularly executing the step one to the step three.

Optionally, after the step three, the communication method of the charger further includes the following steps:

and (4) judging whether the electric signal of the battery pack parameter required to be called by the optical signal in the step one is normal, if so, executing the step one, and if not, finishing the work of the electric tool.

Optionally, in the communication method of the charger, the battery pack parameters include a battery pack charging protection parameter and a real-time operating parameter.

Compared with the prior art, this application provides a battery package, through set up first light generator and first light reception on the battery package and come as its information interaction passageway, can avoid like this to wire at current battery package communication port, still need not to do waterproof design simultaneously. Furthermore, through the corresponding setting on electric tool and charger second light receiver and second light generator and third light receiver and third light generator can realize like this that the battery package all can give through continuous acceptance light signal and sending light signal electric tool and charger carry out the information interaction with it in discharging process and charging process, and this kind of communication method can not lead to the problem that the communication is not smooth and easy because of factors such as external contact failure and waterproof, can reduce its requirement to service environment to adapt to more use scenes.

Drawings

Fig. 1 is a flowchart illustrating a communication interaction between a battery pack and a power tool according to a first scenario provided by the embodiment of the present application;

fig. 2 is a system diagram of a battery pack and a power tool in a scenario one provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of a controller provided by an embodiment of the present application;

fig. 4 is a flowchart illustrating communication interaction between a battery pack and a charger according to a first scenario provided by the embodiment of the present application;

FIG. 5 is a system diagram of a battery pack and charger according to a first scenario provided by an embodiment of the present application;

fig. 6 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another battery pack provided in an embodiment of the present application;

fig. 8 is a partial cross-sectional view of the battery pack of fig. 7 provided by an embodiment of the present application;

FIG. 9 is a schematic view of a portion of a power tool according to an embodiment of the present disclosure;

FIG. 10 is an assembly view of a power tool and battery pack provided by an embodiment of the present application;

fig. 11 is a schematic structural diagram of a charger according to an embodiment of the present disclosure;

fig. 12 is an assembly view of a charger and a battery pack according to an embodiment of the present disclosure.

Wherein the reference numerals of figures 6-12 are as follows:

10-a battery pack; 11-a battery cell; 12-a battery housing; 121-a first optical receiver; 122-a first light generator; 123-a first lighting lamp; 20-a power tool; 21-a tool housing; 211-a mounting groove; 212-a second optical receiver; 213-a second light generator; 214-a second light; 22-a second controller; 30-a charger; 31-a charging slot; 311-a third optical receiver; 312-third light generator.

Detailed Description

In order to make the objects, advantages and features of the present invention more clear, the battery pack, the electric tool, the charger and the communication method of the battery pack, the electric tool and the charger according to the present invention are further described in detail with reference to fig. 1 to 12. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, an integral connection, an electrical connection, and a communication connection. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-12, for the convenience of describing the technical solution disclosed in the present application, a battery pack 10 communication platform of the power tool 20 is described herein, wherein the battery pack 10 communication platform includes the power tool 20, the battery pack 10 and the charger 30.

Before the introduction, it should be noted that, for the sake of distinction and convenience of description, the corresponding structures and/or components and the corresponding signals sent out by the battery pack 10, the power tool 20 and the charger 30 are respectively distinguished for the applications "first", "second" and "third". For example, the controller on the battery pack 10 is a first controller (not shown), the controller on the power tool 20 is a second controller 22, and the controller on the charger 30 is a third controller. The light receiver on the battery pack 10 is the first light receiver 121, the light receiver on the power tool 20 is the second light receiver 212, and the light receiver on the charger 30 is the third light receiver 311. The light generator on the battery pack 10 is the first light generator 122, the light generator on the power tool 20 is the second light generator 213, and the light receiver on the charger 30 is the third light generator 312.

Scene one: an implementation scenario of communication between the battery pack 10 and the power tool 20 is now described, and with particular reference to fig. 1-3 in conjunction with fig. 6, 8, 9, and 10, the implementation scenario includes the battery pack 10 and the power tool 20.

Referring to fig. 9, the power tool 20 includes a tool housing 21 and a second controller 22, wherein the second controller 22 is disposed in the tool housing 21. The tool housing 21 has a mounting groove 211 therein, and a second light receiver 212 and a second light generator 213 are disposed in the mounting groove 211. Referring to fig. 6 to 7, the battery pack 10 is mounted in the mounting groove 211 and forms a first communication channel with the mounting groove 211 when supplying power to the power tool 20; and the first light receiver 121, the first light generator 122, the second light receiver 212, and the second light generator 213 are all located within the first communication channel.

Referring to fig. 1-2 and fig. 11, when the power tool 20 is in operation, the second light generator 213 first sends a light signal containing an activation command to the first light receiver 121, and the first controller on the battery pack 10 modulates the light signal containing the activation command received by the first light receiver 121 into an electrical signal containing the activation command that can be recognized by the first controller, and activates the battery pack 10 based on the electrical signal containing the activation command. After the battery pack 10 is activated, the second light generator 213 sends an optical signal containing a parameter instruction for calling the battery pack 10 to the first light receiver 121, and the first controller converts the optical signal containing the parameter instruction for calling the battery pack 10 received by the first light receiver 121 into an electrical signal capable of being recognized and containing the parameter instruction for calling the battery pack 10. The first controller controls the first light generator 122 to send the optical signal containing the parameter of the battery pack 10 required to be retrieved by the electrical signal based on the electrical signal containing the instruction for retrieving the parameter of the battery pack 10. The second controller 22 modulates the optical signal containing the parameter of the battery pack 10 required to be called by the electric tool 20 into an electrical signal containing the parameter of the battery pack 10, and determines whether the electrical signal is correct, if so, the first optical generator 122 sends the optical signal containing the parameter of the battery pack 10 to the second optical receiver 212, the second controller 22 modulates the optical signal into an electrical signal, and determines whether the received parameter of the battery pack 10 is normal, if so, the second optical generator 213 sends the optical signal containing the parameter instruction of the battery pack 10 in a circulating manner, meanwhile, the first optical generator 122 receives the optical signal in a circulating manner and sends the optical signal containing the parameter of the battery pack 10, and if not, the electric tool 20 finishes working.

When the first light generator 122 sends the optical signal to the second light receiver 212, the parameters of the battery pack 10 included in the optical signal include discharge protection parameters and real-time operating parameters of the battery pack 10, and only the real-time operating parameters of the optical signal are included in the optical signal sent in the subsequent cycle. The real-time operating parameters at least include cell voltage and cell temperature.

Referring to fig. 3, the second controller 22 includes a control unit, an encoding unit and a decoding unit. The encoding unit generates an instruction information encoding signal according to a transmission protocol from the instruction information that the electric tool 20 needs to send to the battery pack 10, and transmits the instruction information encoding signal to the modulation circuit electrically connected to the second controller 22, the modulation circuit modulates the instruction information encoding signal and outputs the modulated instruction information encoding signal to the second light generator 213, and the second light generator 213 sends the light wave containing the instruction information encoding signal to the first light receiver 121. The first light receiver 121 receives visible light or invisible light emitted from the second light generator 213.

The transmission protocol includes a standard infrared transmission protocol or a custom transmission protocol, and if the light wave of the second light generator 213 is infrared, the custom transmission protocol or the standard infrared transmission protocol is used, and the standard infrared transmission protocol is, for example, an NFC protocol, an ITT protocol, or the like. If the second light generator 213 emits visible light, a custom transmission protocol may be used, which is safer and more private during signal transmission.

The first optical receiver 121 receives the light wave of the instruction information encoding signal transmitted by the second light generating module, and output to the amplifying circuit and the demodulating circuit which are electrically connected with the first controller for signal amplification and demodulation, the decoding unit of the first controller receives and decodes the demodulated command information coding signal, the encoding unit of the first controller generates the parameter information encoding signal of the battery pack 10 according to the transmission protocol from the parameter information of the battery pack 10 according to the received command information encoding signal, and the parameter information encoding signal of the battery pack 10 is transmitted to the modulation circuit electrically connected to the first controller, the modulation circuit modulates the parameter information encoding signal of the battery pack 10 and outputs the modulated signal to the first light generator 122, and the first light generator 122 transmits the light wave containing the parameter information encoding signal of the battery pack 10 to the second light receiver 212. The second light receiver 212 receives visible light or invisible light emitted by the first light generator 122.

The second optical receiver 212 receives the light wave of the battery pack 10 parameter information encoding signal emitted by the first optical generator 122, and outputs the light wave to an amplifying circuit and a demodulating circuit electrically connected to the second controller 22 for signal amplification and demodulation, the decoding unit of the second controller 22 receives the demodulated battery pack 10 parameter information encoding signal and decodes the demodulated battery pack 10 parameter information encoding signal, the encoding unit of the second controller 22 generates an instruction information encoding signal according to a transmission protocol from instruction information to be sent to the battery pack 10 again according to the received battery pack 10 parameter information encoding signal, and transmits the instruction information encoding signal to the modulating circuit electrically connected to the second controller 22, and the modulating circuit modulates the instruction information encoding signal and outputs the modulated instruction information encoding signal to the second optical generator 213.

The battery pack 10 and the power tool 20 exchange information with each other through a series of amplification, demodulation, and decoding. Here, the first light generator 122 and the second light generator 213 may be lighting devices provided in the battery pack 10 and the power tool 20 themselves, without adding an additional emitting device to save the manufacturing cost of the power tool 20. It can also be an additional lighting device or an infrared generating device, in which the infrared transmission speed is very rapid, and its flashing frequency is also very high, and it can not be detected by human eyes.

The electric tool 20 is a dc electric drill, a wrench, an electric hammer, an electric scissors, an electric circular saw, a reciprocating saw, a lawnmower, a vacuum cleaner, a blower, a jointer, a screwdriver, a hole puncher, a vacuum pump, an angle grinder, a sweeper, a sander, a cutter, a radio, a coffee maker, a laser level meter, etc.

Scene two: an implementation scenario of communication between the battery pack 10 and the charger 30 will now be described, with particular reference to fig. 4-5 in conjunction with fig. 6, 8, 11, and 12, which includes the battery pack 10 and the charger 30.

Referring to fig. 11, the charger 30 includes a charging slot 31, the battery pack 10 is disposed in the charging slot 31, and the battery pack 10 and the charging slot 31 form a second communication channel; the charger 30 further comprises a third light receiver 311 and a third light generator 312;

and, the first light receiver 121, the first light generator 122, the third light receiver 311, and the third light generator 312 are all located within the second communication channel;

wherein the first light generator 122 is communicatively coupled to the third light receiver 311, and the third light generator 312 is communicatively coupled to the first light receiver 121;

the first light generator 122 emits a third light signal, the third light receiver 311 receives the third light signal, the third light generator 312 emits a fourth light signal, and the first light receiver 121 receives the fourth light signal.

Referring to fig. 6-8, the battery pack 10 is installed in the charging slot 31 and forms a second communication channel with the charging slot 31 when charging is required; and the first light receiver 121, the first light generator 122, the third light receiver 311, and the third light generator 312 are all located within the second communication channel.

Referring to fig. 4-5, in conjunction with fig. 12, when the battery pack 10 is charged, the third light generator 312 first sends a light signal containing an activation instruction to the first light receiver 121, and the first controller on the battery pack 10 modulates the light signal containing the activation instruction received by the first light receiver 121 into an electrical signal containing the activation instruction, which can be recognized by the first controller, and activates the battery pack 10 based on the electrical signal containing the activation instruction. After the battery pack 10 is activated, the third light generator 312 sends an optical signal containing a parameter instruction for calling the battery pack 10 to the first light receiver 121, and the first controller converts the optical signal containing the parameter instruction for calling the battery pack 10 received by the first light receiver 121 into an electrical signal capable of being recognized and containing the parameter instruction for calling the battery pack 10. The first controller controls the first light generator 122 to send the optical signal containing the parameter of the battery pack 10 required to be retrieved by the electrical signal based on the electrical signal containing the instruction for retrieving the parameter of the battery pack 10. The third controller modulates the optical signal containing the parameter of the battery pack 10 required to be called by the electric tool 20 into an electrical signal containing the parameter of the battery pack 10, and determines whether the electrical signal is correct, if so, the first optical generator 122 sends the optical signal containing the parameter of the battery pack 10 to the second optical receiver 212, the third controller modulates the optical signal into an electrical signal, and determines whether the received parameter of the battery pack 10 is normal, if so, the third optical generator 312 sends the optical signal containing the parameter instruction of the battery pack 10 in a circulating manner, meanwhile, the first optical generator 122 receives the optical signal in a circulating manner and sends the optical signal containing the parameter of the battery pack 10, and if not, the charger 30 ends charging.

When the first light generator 122 sends the optical signal to the third optical receiver 311, the parameters of the battery pack 10 included in the optical signal include the charge protection parameter and the real-time operating parameter of the battery pack 10, and only the real-time operating parameter of the optical signal is included in the optical signal sent in the subsequent cycle. The real-time operating parameters at least include cell voltage and cell temperature.

Referring to fig. 3, the third controller includes a control unit, an encoding unit and a decoding unit. The encoding unit generates an instruction information encoding signal according to a transmission protocol from the instruction information that the electric tool 20 needs to send to the battery pack 10, and transmits the instruction information encoding signal to the modulation circuit electrically connected to the third controller, the modulation circuit modulates the instruction information encoding signal and outputs the modulated instruction information encoding signal to the third light generator 312, and the third light generator 312 sends the light wave containing the instruction information encoding signal to the first light receiver 121. The first light receiver 121 receives visible light or invisible light emitted by the third light generator 312.

The transmission protocol includes a standard infrared transmission protocol or a custom transmission protocol, and if the light wave of the third light generator 312 is infrared, the custom transmission protocol or the standard infrared transmission protocol is used, and the standard infrared transmission protocol is, for example, an NFC protocol, an ITT protocol, or the like. If the light generated by the third light generator 312 is visible light, a custom transmission protocol may be used, and the custom transmission protocol is safer and more private in the signal transmission process.

The first optical receiver 121 receives the light waves of the command information encoding signal emitted by the third light generator 312, and output to the amplifying circuit and the demodulating circuit which are electrically connected with the first controller for signal amplification and demodulation, the decoding unit of the first controller receives and decodes the demodulated command information coding signal, the encoding unit of the first controller generates the parameter information encoding signal of the battery pack 10 according to the transmission protocol from the parameter information of the battery pack 10 according to the received command information encoding signal, and the parameter information encoding signal of the battery pack 10 is transmitted to the modulation circuit electrically connected to the first controller, the modulation circuit modulates the parameter information encoding signal of the battery pack 10 and outputs the modulated signal to the first light generator 122, and the first light generator 122 transmits the light wave including the parameter information encoding signal of the battery pack 10 to the third light receiver 311. The third light receiver 311 receives visible light or invisible light emitted by the first light generator 122.

The third optical receiver 311 receives the light wave of the parameter information encoding signal of the battery pack 10 transmitted by the first optical generator 122, and outputs the light wave to an amplifying circuit and a demodulating circuit electrically connected to a third controller for signal amplification and demodulation, the decoding unit of the third controller receives the demodulated parameter information encoding signal of the battery pack 10 and decodes the demodulated parameter information encoding signal, the encoding unit of the third controller re-generates the instruction information encoding signal according to the transmission protocol from the instruction information to be sent to the battery pack 10 according to the received parameter information encoding signal of the battery pack 10, and transmits the instruction information encoding signal to the modulating circuit electrically connected to the third controller, and the modulating circuit modulates the instruction information encoding signal and outputs the modulated instruction information encoding signal to the third optical generator 312.

The battery pack 10 and the charger 30 exchange information with each other through a series of amplification, demodulation, and decoding. Among them, the first light generator 122 and the third light generator 312 may be lighting devices provided in the battery pack 10 and the charger 30 themselves, without additionally adding a transmitting device to save the manufacturing cost of the power tool 20. It can also be an additional lighting device or an infrared generating device, in which the infrared transmission speed is very rapid, and its flashing frequency is also very high, and it can not be detected by human eyes.

It should be noted that the first controller and the third controller both include a control unit, an encoding unit and a decoding unit, and the working principle here is similar to that of the second controller 22, and thus is not described herein again. See figure 3 for a detailed schematic.

The above embodiment only takes the example of the battery pack 10 supplying power to the electric tool 20 and the charger 30 charging the battery pack 10, but in order to realize the above information interaction of the battery pack 10, the electric tool 20 and the charger 30 need some corresponding designs in structure, and the battery pack 10, the electric tool 20 and the charger 30 are structurally described with reference to fig. 6-12.

Referring to fig. 6-8, the present application provides a battery pack 10, where the battery pack 10 includes a battery cell 11 and a battery housing 12, the battery cell 11 is disposed in the battery housing 12, and a first light receiver 121 and a first light generator 122 are further disposed on the battery housing 12. The first optical receiver 121 is configured to send the operating parameter of the battery cell 11 to the power tool 20 or the charger 30, and the first optical receiver 121 is configured to receive a command signal for the power tool 20 or the charger 30 to retrieve the operating parameter of the battery cell 11.

Referring now more particularly to FIG. 7, the first light generator 122 emits light that is visible or invisible. When the first light generator 122 emits visible light, a first illumination lamp 123 is disposed on the battery pack 10 as the first light generator 122. The first illumination lamp 123 may be used only as the first light generator 122, or may also be used as an illumination device and the first light generator 122. When the first light generator 122 emits invisible light, the first light generator 122 is an infrared light generator that emits invisible light.

In a possible design, when the first illumination lamp 123 serves as both the illumination device and the first light generator 122, one of the structures is designed that the first illumination lamp 123 is disposed on the battery pack 10, and the battery pack 10 further includes a first light guide (not shown), one end of the first light guide is connected to the first illumination lamp 123, and the other end of the first light guide is close to the first light receiver 121. At this time, when the battery pack 10 needs to perform information interaction with the power tool 20 or the charger 30, the first light guide column transmits the light source of the first illumination lamp 123 to the first communication channel or the second communication channel.

Referring to fig. 9-10, in another aspect, the present application also provides a power tool 20 comprising: in the battery pack 10, the tool housing 21 and the second controller 22, the second controller 22 is disposed in the tool housing 21, the tool housing 21 includes a mounting groove 211, and a second light receiver 212 and a second light generator 213 are disposed in the mounting groove 211. Specifically, the second controller 22 is disposed in the mounting groove 211, so that the wiring is simpler and more convenient. The battery pack 10 is installed in the installation groove 211, and forms a first communication channel with the installation groove 211; and the first light receiver 121, the first light generator 122, the second light receiver 212 and the second light generator 213 are all located within the first communication channel (not shown).

Wherein the first light generator 122 is communicatively coupled to the second light receiver 212 and the second light generator 213 is communicatively coupled to the first light receiver 121.

The second controller 22 is communicatively connected to the second light receiver 212 and the second light generator 213; the second controller 22 controls the second light generator 213 to emit a light signal containing an instruction for retrieving the parameter of the battery pack 10, the first light receiver 121 receives the light signal, and the first light generator 121 emits a light signal containing the parameter of the battery pack 10 to the second light receiver 212 according to the light signal.

Wherein, along the length direction of the first communication channel, the shortest distance between the first light receiver 121 and the second light generator 213 and the shortest distance between the first light generator 122 and the second light receiver 212 are not greater than 1 mm. That is, the shortest distance between the first light receiver 121 and the second light generator 213 is not greater than 1mm, and the shortest distance between the first light generator 122 and the second light receiver 212 is not greater than 1 mm. If the distance is too large, it is easy that the optical signal generated by the second optical generator 213 cannot be accurately received by the first optical receiver 121 and the optical signal generated by the first optical generator 122 cannot be accurately received by the second optical receiver 212 during the optical signal transmission process.

Wherein, when the first light generator 122 and the second light generator 213 both emit visible light; the second light generator 213 may be an illumination lamp of the electric tool 20, the electric tool 20 further includes a second light guide pillar, one end of the second light guide pillar is connected to the illumination lamp of the electric tool 20, and the other end of the second light guide pillar is located in the first communication channel. Thus, it is not necessary to provide an additional illumination lamp as the second light generator 213 in the first communication channel, which can save cost and make the structure more compact. Of course, an illumination lamp may be further disposed in the first communication channel as the second light generator 213 for emitting visible light, which is not limited herein.

When the second light generator 213 emits invisible light, the second light generator 213 is an infrared light generating device that emits invisible light.

Referring to fig. 11-12, in a further aspect, the present application further provides a charger 30 for charging the battery pack 10, including a charging slot 31, the battery pack 10 being disposed in the charging slot 31, the battery pack 10 and the charging slot 31 forming a second communication channel (not shown); the charger 30 further comprises a third light receiver 311 and a third light generator 312.

And, the first light receiver 121, the first light generator 122, the third light receiver 311, and the third light generator 312 are all located within the second communication channel.

Wherein the first light generator 122 is communicatively coupled to the third light receiver 311, and the third light generator 312 is communicatively coupled to the first light receiver 121.

The third optical transmitter 311 transmits an optical signal containing an instruction to retrieve the parameter of the battery pack 10, the first optical receiver 121 receives the optical signal, the first optical generator 122 transmits an optical signal containing the parameter of the battery pack 10 according to the optical signal, and the third optical receiver 312 receives the optical signal containing the parameter of the battery pack 10.

Along the length direction of the second communication channel, a shortest distance between the first light receiver 121 and the third light generator 312, a shortest distance between the first light generator 122 and the third light receiver 311, and a shortest distance between the first light receiver 121 and the third light generator 312 are not greater than 1mm, and a shortest distance between the first light generator 122 and the third light receiver 311 are not greater than 1 mm. That is, the shortest distance between the first light receiver 121 and the third light generator 312 is not greater than 1mm, and the shortest distance between the first light generator 122 and the third light receiver 311 is not greater than 1 mm. If the distance is too large, it is easy that the optical signal generated by the third optical generator 312 cannot be accurately received by the first optical receiver 121 and the optical signal generated by the first optical generator 122 cannot be accurately received by the third optical receiver 311 during the optical signal transmission process.

When both the first light generator 122 and the third light generator 312 emit visible light; the third light generator 312 may be a lamp of the charger 30, and the charger 30 further includes a third illuminating lamp and a third light guiding pillar, one end of the third light guiding pillar is connected to the third illuminating lamp, and the other end of the third light guiding pillar is located in the second communication channel. Thus, an additional illuminating lamp is not required to be arranged in the first communication channel to serve as the third light generator 312, so that the cost can be saved and the structure can be more compact. Of course, an illumination lamp may be further disposed in the second communication channel as the third light generator 312 for emitting visible light, which is not limited herein.

When the third light generator 312 emits invisible light; the third light generator 312 is an infrared light generating device.

It should be noted that the first illumination lamp 123, the second illumination lamp 214, and the third illumination lamp 313 are not intended to highlight the illumination function thereof, or the first illumination lamp 123, the second illumination lamp 214, and the third illumination lamp 313 may only have the illumination function, and may be one of lamps capable of emitting visible light, such as an indicator lamp, for example, the third illumination lamp on the charger 30 may be an indicator lamp on the charger 30.

In another aspect, the present application further provides a communication method of a battery pack 10, which provides the above battery pack 10; the method comprises the following steps:

the method comprises the following steps: receiving an optical signal containing a command for calling parameters of the battery pack 10;

step two: converting the optical signal containing the instruction for calling the parameter of the battery pack 10 into a corresponding electrical signal containing the instruction for calling the parameter of the battery pack 10;

step three: sending an optical signal which contains an optical signal for calling the parameter of the battery pack 10 and is required by the electrical signal for calling the parameter instruction of the battery pack 10;

and repeatedly and circularly executing the step one to the step three. That is, in the normal charging and discharging process of the battery pack 10, the battery pack 10 will continuously receive the optical signal containing the parameter instruction for calling the battery pack 10, continuously modulate the optical signal into the corresponding electrical signal, send the optical signal containing the parameter instruction for calling the battery pack 10 required for calling the parameter of the battery pack 10 according to the electrical signal, and continuously repeat the communication step. To transmit real-time operating parameters of the battery pack 10 to the charger 30 or the power tool 20 in real time.

In one embodiment, the following steps are further included before the step one is executed:

receiving an optical signal containing an activation instruction;

modulating the optical signal containing the activation instruction into a corresponding electrical signal containing the activation instruction;

the battery pack 10 is initialized based on the electric signal including the activation instruction.

More preferably, the method further comprises the following steps before the step three is executed:

and judging whether the electric signal containing the instruction for calling the parameter of the battery pack 10 is correct or not, if so, executing the step three, and if not, judging whether the battery pack 10 enters a standby dormant state or not.

It should be noted that the parameters include protection parameters of the battery pack 10 and real-time operation parameters of the battery pack 10. The protection parameters of the battery pack 10 are discharge protection parameters or charge protection parameters. In this case, the battery pack 10 transmits the charge protection parameter to the charger 30 or the discharge protection parameter to the power tool 20 only when step three is performed for the first time.

In a further aspect, the present application further provides a communication method for an electric tool 20, providing an electric tool 20 as described above; the method comprises the following steps:

the method comprises the following steps: transmitting an optical signal containing a command for calling the parameters of the battery pack 10;

step two: receiving an optical signal containing parameters of the battery pack 10 required to be called by the optical signal in the step one;

step three: modulating the received optical signal in the second step into a corresponding electric signal containing the parameters of the battery pack 10 required to be called by the optical signal in the first step;

and repeatedly and circularly executing the step one to the step three. That is, during the normal operation of the electric tool 20, the electric tool 20 will continuously transmit the optical signal containing the command for retrieving the parameter of the battery pack 10, continuously receive the optical signal containing the parameter of the battery pack 10 that needs to be retrieved from the optical signal in the first step, modulate the received optical signal in the second step into the corresponding electrical signal containing the parameter of the battery pack 10 that needs to be retrieved from the optical signal in the first step, and continuously repeat the communication step. To retrieve real-time operating parameters of the battery pack 10 in real-time.

Wherein, after the third step is executed, the following steps are also included:

and (3) judging whether the electrical signals of the parameters of the battery pack 10 required to be called by the optical signals in the step one are normal or not, if so, executing the step one, and if not, finishing the work of the electric tool 20.

It should be noted that the parameters of the battery pack 10 include discharge protection parameters and real-time operation parameters of the battery pack 10. The discharge protection parameters of the battery pack 10 are only retrieved when the step one is performed for the first time.

Further, the present application also provides a communication method of the charger 30, providing the above-mentioned charger 30; the method comprises the following steps:

the method comprises the following steps: transmitting an optical signal containing a command for calling the parameters of the battery pack 10;

step two: receiving an optical signal containing parameters of the battery pack 10 required to be called by the optical signal in the step one;

step three: modulating the received optical signal in the second step into a corresponding electric signal containing the parameters of the battery pack 10 required to be called by the optical signal in the first step;

and repeatedly and circularly executing the step one to the step three.

Wherein, after the third step is executed, the following steps are also included:

and (3) judging whether the electrical signals of the parameters of the battery pack 10 required to be called by the optical signals in the step one are normal or not, if so, executing the step one, and if not, finishing the work of the electric tool 20.

Further, the parameters of the battery pack 10 include charging protection parameters and real-time operating parameters of the battery pack 10.

It should be noted that, the steps of the communication method of the charger 30, except for the retrieved protection parameter of the battery pack 10, are the charging protection parameter of the battery pack 10, and are different from the step of the communication method of the electric tool 20, where the protection parameter of the battery pack 10 that needs to be retrieved is the discharging protection parameter. The steps and principles of the communication method of the charger 30 are the same as or similar to those of the communication method of the electric tool 20, and are not described herein again.

In summary, the first light generator 122 and the first light receiver are arranged on the battery pack 10 to serve as information interaction channels, so that wiring at the communication port of the existing battery pack 10 can be avoided, and meanwhile, a waterproof design is not required. Further, the second light receiver 212, the second light generator 213, the third light receiver 311 and the third light generator 312 are correspondingly arranged on the electric tool 20 and the charger 30, so that the battery pack 10 can continuously receive light signals and send the light signals to the electric tool 20 and the charger 30 to perform information interaction with the electric tool 20 and the charger 30 in the discharging process and the charging process, the problem of unsmooth communication caused by poor contact, water resistance and other factors outside can be avoided by the communication method, the requirements of the electric tool on the use environment can be reduced, and more use scenes can be adapted.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (24)

1. A battery pack is characterized by comprising a battery core and a battery shell, wherein the battery core is arranged in the battery shell, and a first light receiver and a first light generator are also arranged on the battery shell; the first optical receiver is used for sending the working parameters of the battery cell to an electric tool or a charger, and the first optical receiver is used for receiving instruction signals of the electric tool or the charger for calling the working parameters of the battery cell.

2. The battery pack of claim 1, wherein the first light generator emits light that is visible or invisible.

3. The battery pack of claim 2, wherein a first illumination lamp is disposed on the battery pack as the first light generator when the first light generator is configured to emit visible light.

4. The battery pack of claim 3, wherein the first illumination lamp is disposed on the battery pack, and the battery pack further comprises a first light guide pillar, one end of the first light guide pillar is connected to the first illumination lamp, and the other end of the first light guide pillar is close to the first light receiver.

5. The battery pack of claim 2, wherein the first light generator is an infrared light generating device when the first light generator is emitting light that is invisible.

6. An electric power tool, characterized by comprising:

the battery pack according to any one of claims 1 to 5;

the tool shell comprises a mounting groove, and a second light receiver and a second light generator are arranged in the mounting groove;

the battery pack is arranged in the mounting groove and forms a first communication channel with the mounting groove; and the first light receiver, the first light generator, the second light receiver, and the second light generator are all located within the first communication channel;

wherein the first light generator is communicatively coupled to the second light receiver and the second light generator is communicatively coupled to the first light receiver;

the second controller is arranged in the tool shell and is in communication connection with the second light receiver and the second light generator; the second controller controls a second light generator to emit light signals containing instructions for calling parameters of the battery pack, the first light receiver receives the light signals, the first light generator emits light signals containing parameters of the battery pack according to the light signals, and the second light receiver receives the light signals containing the parameters of the battery pack.

7. The power tool of claim 6, wherein a shortest distance between the first light receiver and the second light generator and a shortest distance between the first light generator and the second light receiver are no greater than 1mm along a length of the first communication channel.

8. The power tool of claim 6, wherein when both the first light generator and the second light generator emit visible light; the electric tool further comprises a second illuminating lamp and a second light guide column, one end of the second light guide column is connected with the second illuminating lamp, and the other end of the second light guide column is located in the first communication channel.

9. The power tool of claim 6, wherein when both the first light generator and the second light generator emit non-visible light; the first light generator and the second light generator are both infrared generating devices.

10. A charger for charging a battery pack according to any one of claims 1 to 5, comprising a charging slot in which the battery pack is disposed, the battery pack and the charging slot forming a second communication channel; the charger further comprises a third light receiver and a third light generator;

and wherein the first light receiver, the first light generator, the third light receiver, and the third light generator are all located within the second communication channel;

wherein the first light generator is communicatively coupled to the third light receiver, and the third light generator is communicatively coupled to the first light receiver;

the third optical transmitter transmits an optical signal containing a command for calling the parameters of the battery pack, the first optical receiver receives the optical signal, the first optical generator transmits the optical signal containing the parameters of the battery pack according to the optical signal, and the third optical receiver receives the optical signal containing the parameters of the battery pack.

11. The electrical charger according to claim 10, wherein a shortest distance between the first light receiver and the third light generator and a shortest distance between the first light generator and the third light receiver are each no greater than 1mm along a length of the second communication channel.

12. The charger according to claim 10, wherein when both the first light generator and the third light generator emit visible light; the charger further comprises a third illuminating lamp and a third light guide column, one end of the third light guide column is connected with the third illuminating lamp, and the other end of the third light guide column is located in the second communication channel.

13. The charger according to claim 10, wherein when both the first light generator and the third light generator emit non-visible light; the first light generator and the third light generator are both infrared generating devices.

14. A battery pack communication method, providing a battery pack according to any one of claims 1 to 5;

the method is characterized by comprising the following steps:

the method comprises the following steps: receiving an optical signal containing a command for calling parameters of a battery pack;

step two: converting the optical signal containing the command for calling the parameter of the battery pack into a corresponding electrical signal containing the command for calling the parameter of the battery pack;

step three: sending an optical signal which contains an electric signal for calling the parameter of the battery pack and is required to call the parameter of the battery pack;

and repeatedly and circularly executing the step one to the step three.

15. The method of claim 14, wherein the step one is further preceded by the step of:

receiving an optical signal containing an activation instruction;

modulating the optical signal containing the activation instruction into a corresponding electrical signal containing the activation instruction;

the battery pack is initialized based on the electrical signal containing the activation command.

16. The method of claim 14, further comprising the following steps before performing step three:

and judging whether the electric signal containing the command for calling the parameter of the battery pack is correct or not, if so, executing the step three, and if not, judging whether the battery pack enters a standby dormant state or not.

17. The method of claim 14, wherein the parameters comprise protection parameters of the battery pack and real-time operating parameters of the battery pack.

18. The method according to claim 17, wherein the protection parameter of the battery pack is a discharge protection parameter or a charge protection parameter.

19. A method of communicating with a power tool, wherein a power tool according to any one of claims 6 to 9 is provided; the method comprises the following steps:

the method comprises the following steps: transmitting an optical signal containing a command for calling the parameter of the battery pack;

step two: receiving an optical signal containing the battery pack parameters required to be called by the optical signal in the step one;

step three: modulating the received optical signal in the second step into a corresponding electric signal containing the battery pack parameters required to be called by the optical signal in the first step;

and repeatedly and circularly executing the step one to the step three.

20. The method of claim 19, further comprising the following steps after performing step three:

and (4) judging whether the electric signal of the battery pack parameter required to be called by the optical signal in the step one is normal, if so, executing the step one, and if not, finishing the work of the electric tool.

21. The method of claim 19, wherein the battery pack parameters include battery pack discharge protection parameters and real-time operating parameters.

22. A communication method of a charger, characterized by providing a charger according to any one of claims 6-9; the method comprises the following steps:

the method comprises the following steps: transmitting an optical signal containing a command for calling the parameter of the battery pack;

step two: receiving an optical signal containing the battery pack parameters required to be called by the optical signal in the step one;

step three: modulating the received optical signal in the second step into a corresponding electric signal containing the battery pack parameters required to be called by the optical signal in the first step;

and repeatedly and circularly executing the step one to the step three.

23. The method of claim 22, further comprising the following steps after performing step three:

and (4) judging whether the electric signal of the battery pack parameter required to be called by the optical signal in the step one is normal, if so, executing the step one, and if not, finishing the work of the electric tool.

24. The method of claim 22, wherein the battery pack parameters include battery pack charge protection parameters and real-time operating parameters.

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