Communication control unit, charging device, electric appliance and communication control method thereof

Abstract

A communication control unit is provided for establishing a communication line between an electrical unit and a battery unit. A power transmission line is arranged between an electrical unit and a battery unit, and a communication control unit responds to the determination that communication interference occurs between the communication control unit and the electrical unit and / or the battery unit when the electrical unit provides electric energy for the battery unit or obtains electric energy from the battery unit. And switching a first communication protocol used for current communication between the communication control unit and the electrical unit and / or the battery unit to a second communication protocol, wherein the anti-interference capability of the second communication protocol is higher than that of the first communication protocol. According to the communication control unit, the communication protocol between the electrical unit and the battery unit can be timely switched according to the interference condition occurring in the system, an additional restarting process or stopping operation on the electrical unit is not needed, and the charging or discharging efficiency of the electrical unit and the battery unit can be remarkably improved.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to a communication control unit, a charging device, an electric appliance, and a communication control method thereof. Background Art

[0002] With the increasing pursuit of life convenience by people, various electric appliances such as grinders, cutters, and electric drills are widely used in daily life and work. At the same time, with the increasingly diversified and complex development of electric appliances for various purposes, the stability of electric appliances during operation and charging has also become an aspect that people pay more attention to currently.

[0003] For electric appliances using batteries, when they are operating or charging, communication is usually required between the electric appliance and the battery. However, the working conditions or charging environment of the electric appliance may cause the normal communication between the electric appliance and the battery to be interfered, resulting in the interruption of the power supply from the battery to the electric appliance or the interruption of the charging of the battery of the electric tool by the charging device. Once the power supply of the electric appliance or the charging of the battery is interrupted, manual restart is required. And if the interference factors for communication still exist after restart, the power supply to the electric appliance or the charging of the battery still cannot be restored. Therefore, the stability of the use of the electric appliance will be greatly affected. Summary of the Invention

[0004] Generally speaking, example embodiments of the present disclosure provide a communication control unit, a charging device, an electric appliance, and a communication control method thereof.

[0005] According to a first aspect, the present disclosure provides a communication control unit for establishing a communication line between an electrical unit and a battery unit. Among them, there is a power transmission line between the electrical unit and the battery unit. The communication control unit is configured to: in response to determining that communication interference occurs between the communication control unit and the electrical unit and / or the battery unit during the period when the electrical unit provides electrical energy to the battery unit or obtains electrical energy from the battery unit, switch the first communication protocol currently used for communication between the communication control unit and the electrical unit and / or the battery unit to a second communication protocol, where the anti-interference ability of the second communication protocol is higher than that of the first communication protocol.

[0006] The communication control unit of the present disclosure can timely switch the communication protocol between the electrical unit and the battery unit according to the interference situation occurring in the system. Therefore, even when there are communication interferences such as harmonics and noise in the power grid, or when there are special working conditions such as increased load during the operation of the electrical unit, resulting in factors such as large current that interfere with communication, the communication between the electrical unit and the battery unit can still be maintained. Thus, the charging or discharging operation of the electrical unit does not need to be interrupted or stopped, and there is no need for an additional restart process of the electrical unit or to stop the operation of the electrical unit. Therefore, the stability of the charging or discharging operation of the electrical unit and the battery unit can be improved, and the charging or discharging efficiency can be significantly increased.

[0007] In some embodiments, the communication frequency of the second communication protocol is different from that of the first communication protocol.

[0008] In some embodiments, the signal type used in the first communication protocol is a digital signal, and the signal type used in the second communication protocol is an analog signal.

[0009] In some embodiments, the sampling time of the sampling signal in the second communication protocol is longer than that of the sampling signal in the first communication protocol.

[0010] In some embodiments, the sampling signal in the first communication protocol is an instantaneous value, and the sampling signal in the second communication protocol is an average value over a period of time.

[0011] In some embodiments, the sampling signal is a voltage signal and / or a current signal characterizing the power supply from the electrical unit to the battery unit or the power acquisition from the battery unit by the electrical unit.

[0012] In some embodiments, the communication control unit includes a detection module, a judgment module, and a switching module; the detection module is configured to detect the state parameter information related to the power supply from the electrical unit to the battery unit or the power acquisition from the battery unit by the electrical unit, and send the state parameter information to the judgment module; the judgment module is configured to judge, based on the received state parameter information, whether the state parameter information conforms to the specification in the first communication protocol used for the current communication between the communication control unit and the electrical unit and / or the battery unit, and in response to determining that the state parameter information does not conform to the specification, determine that there is a communication interference on the communication line, and send corresponding interference indication information to the switching module; the switching module is configured to switch the first communication protocol used for the current communication between the communication control unit and the electrical unit and / or the battery unit to the second communication protocol in response to the received interference indication information.

[0013] In some embodiments, the determination module is configured to determine the interference level occurring on the communication line based on the status parameter information detected by the detection module related to the electrical unit supplying electrical energy to the battery unit or obtaining electrical energy from the battery unit, and send interference indication information to the switching module, where the interference indication information indicates the interference level; and the switching module is configured to, in response to receiving the interference indication information, switch the first communication protocol currently used for communication between the communication control unit and the electrical unit and / or the battery unit to another communication protocol corresponding to the interference level indicated by the interference indication information; where the communication protocols corresponding to different interference levels are different.

[0014] In some embodiments, the status parameter information is an electrical signal characterizing the magnitude of the voltage and / or current related to the electrical unit supplying electrical energy to the battery unit or obtaining electrical energy from the battery unit; the detection module includes a sampling circuit, and the sampling circuit is configured to collect the electrical signal and send the electrical signal to the determination module; the determination module is configured to, in response to determining that the electrical signal does not conform to the specifications in the first communication protocol currently used for communication between the communication control unit and the electrical unit and / or the battery unit, send interference indication information to the switching module.

[0015] In some embodiments, the status parameter information is the value of the first time interval elapsed from when the communication control unit sends the first communication instruction to the electrical unit and / or the battery unit until the response information to the first communication instruction is received from the electrical unit and / or the battery unit, or is the value of the second time interval elapsed from when the communication control unit sends the first communication instruction to the electrical unit and / or the battery unit until before the response information to the first communication instruction is received from the electrical unit and / or the battery unit; the detection module includes a timing circuit, and the timing circuit is configured to record the value of the first time interval or the second time interval and send the value of the first time interval or the second time interval to the determination module; the determination module is configured to, in response to determining that the value of the first time interval or the second time interval is greater than a predetermined value, send interference indication information to the switching module.

[0016] In some embodiments, the first communication instruction is an instruction for the communication control unit to request to obtain the status parameters of the electrical unit and / or the battery unit from the electrical unit and / or the battery unit, or is an instruction for transmitting charging or discharging related parameters to the electrical unit and / or the battery unit.

[0017] In some embodiments, the determination module is configured to determine, based on the received status parameter information, whether the status parameter information conforms to the specifications corresponding to the current charging stage or discharging stage of the battery unit in the first communication protocol, and in response to determining that the status parameter information does not conform to the specifications, determine that there is communication interference on the communication line and send corresponding interference indication information to the switching module.

[0018] According to a second aspect, the present disclosure provides a charging device, including a charging unit and a communication control unit according to any one of the foregoing embodiments. Wherein, the charging unit is configured to provide electrical energy to a battery unit connected to the charging device based on one of at least two communication protocols provided by the communication control unit.

[0019] According to a third aspect, the present disclosure provides an electric appliance, including a drive control unit and a communication control unit according to any one of the foregoing embodiments. Wherein, the drive control unit is configured to obtain electrical energy from a battery unit installed on the electric appliance based on one of at least two communication protocols provided by the communication control unit.

[0020] According to a fourth aspect, the present disclosure provides a battery device, including a battery unit and a communication control unit according to any one of the foregoing embodiments. Wherein, the battery unit is configured to obtain electrical energy from a charging device or provide electrical energy to an electric appliance based on one of at least two communication protocols provided by the communication control unit.

[0021] The present disclosure also provides a communication control method for providing communication between an electrical unit and a battery unit. The method includes: Step one (S1): electrically connecting the electrical unit and the battery unit; Step two (S2): in response to the electrical connection between the electrical unit and the battery unit, activating a first communication protocol, and communicating between the electrical unit and the battery unit based on the first communication protocol; Step three (S3): determining that communication interference occurs between the communication control unit and the electrical unit and / or the battery unit during the period when the electrical unit provides electrical energy to the battery unit or obtains electrical energy from the battery unit; and Step four (S4): in response to determining that communication interference occurs, closing the first communication protocol and activating a second communication protocol, and communicating between the electrical unit and the battery unit based on the second communication protocol, wherein the anti-interference ability of the second communication protocol is higher than that of the first communication protocol.

[0022] It can be understood that this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. Description of the Drawings

[0023] Through a more detailed description of some embodiments of the present disclosure in the accompanying drawings, the above and other advantages, features, and objectives of the present disclosure will become more obvious, wherein:

[0024] Figure 1 is a schematic block diagram of the working mode of a communication control unit according to an embodiment of the present disclosure;

[0025] Figure 2 shows a schematic diagram of the components of a communication control unit according to an embodiment of the present disclosure;

[0026] Figure 3 is a schematic block diagram of the operation mode of a communication control unit according to another embodiment of the present disclosure;

[0027] Figure 4 is a schematic block diagram of the operation mode of a communication control unit according to still another embodiment of the present disclosure;

[0028] Figure 5 is a schematic block diagram of the operation mode of a communication control unit according to still another embodiment of the present disclosure;

[0029] Figure 6 is a schematic flowchart of a communication control method according to still another embodiment of the present disclosure;

[0030] In all the drawings, the same or similar reference numerals denote the same or similar elements. Detailed Embodiments

[0031] Now, the principles of the present disclosure will be described with reference to some exemplary embodiments. It should be understood that these embodiments are described only for the purpose of illustration and to assist those skilled in the art in understanding and implementing the present disclosure, and are not intended to suggest any limitation on the scope of the present disclosure. The content of the present disclosure described herein can be implemented in various ways other than those described below.

[0032] As used herein, the term "comprising" and its various variants can be understood as open - ended terms, meaning "including but not limited to". The term "based on" can be understood as "at least partially based on". The term "one embodiment" can be understood as "at least one embodiment". The term "another embodiment" can be understood as "at least one other embodiment". In addition, in the context of the present disclosure, the terms "information", "signal", "data" can be used interchangeably for the convenience of discussion. Other obvious and implied definitions are included hereinafter.

[0033] Figure 1 A schematic block diagram showing the operation mode of a communication control unit in which one embodiment of the present disclosure is implemented is shown. The communication control unit 10 is used to establish communication between the electrical unit 11 and the battery unit 12. The communication control unit 10 is configured to switch the first communication protocol currently used for communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 to a second communication protocol in response to determining that communication interference occurs between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 during the period when the electrical unit 11 supplies electrical energy to the battery unit 12 or obtains electrical energy from the battery unit 12, wherein the anti - interference ability of the second communication protocol is higher than that of the first communication protocol.

[0034] A power transmission line L1 is provided between the electrical unit 11 and the battery unit 12 to achieve the power transmission between the electrical unit 11 and the battery unit 12. The direction of power transmission can be from the electrical unit 11 to the battery unit 12. For example, when the electrical unit 11 is a charging module of a charging device, electric energy will be transmitted from the electrical unit 11 to the battery unit 12 through the power transmission line L1 to charge the battery unit 12. The direction of power transmission can also be from the battery unit 12 to the electrical unit 11. For example, when the electrical unit 11 is a drive or control unit of a power tool, electric energy will be transmitted from the battery unit 12 to the electrical unit 11 through the power transmission line L1 to supply power to the electrical unit 11. The specific direction of power transmission between the electrical unit 11 and the battery unit 12 is determined according to the specific usage scenario of the system, or according to the potential difference between the electrical unit 11 and the battery unit 12.

[0035] A communication control unit 10 is provided between the electrical unit 11 and the battery unit 12 to provide a communication loop between the electrical unit 11 and the battery unit 12. As Figure 1 shown, a communication transmission line L2 is provided between the communication control unit 10 and the electrical unit 11 for one-way or two-way communication between the communication control unit 10 and the electrical unit 11. The communication control unit 10 can send a request to obtain the status parameters of the electrical unit 11 to the electrical unit 11 through the communication transmission line L2, or receive the status parameters related to the electrical unit 11 from the electrical unit 11 through the communication transmission line L2, or transmit instructions related to charging or discharging to the electrical unit 11 through the communication transmission line L2. A communication transmission line L3 is provided between the communication control unit 10 and the battery unit 12 for one-way or two-way communication between the communication control unit 10 and the battery unit 12. The communication control unit 10 can send a request to obtain the status parameters of the battery unit 12 to the battery unit 12 through the communication transmission line L3, or receive the status parameters related to the battery unit 12 from the battery unit 12 through the communication transmission line L3, or transmit instructions related to charging or discharging to the battery unit 12 through the communication transmission line L3.

[0036] In the default state, after the electrical unit 11 and the battery unit 12 are electrically connected, the communication control unit 10 performs communication handshake and subsequent communication actions with the electrical unit 11 and / or the battery unit 12 according to the first communication protocol through the communication transmission line L2 and the communication transmission line L3. The first communication protocol can stipulate information related to communication such as the transmission mode of communication signals, the communication frequency, and the communication data format.

[0037] In one embodiment, the parameters of power transmission between the electrical unit 11 and the battery unit 12 can also be associated with the first communication protocol. For example, the first communication protocol can specify the voltage and current values provided by the electrical unit 11 to the battery unit 12, or the voltage and current values provided by the battery unit 12 to the electrical unit 11. Therefore, when the communication control unit 10 communicates with the electrical unit 11 and / or the battery unit 12 according to the first communication protocol, the electrical unit 11 and the battery unit 12 will charge or discharge according to the voltage and current values specified by the first communication protocol.

[0038] During the charging process of the electrical unit 11 to the battery unit 12, power anomalies such as harmonics and surges often occur in the mains system connected to the electrical unit 11, and battery anomalies such as overvoltage, overcurrent, and high temperature also occur in the battery unit 12. These anomalies may interfere with the communication between the electrical unit 11 and the battery unit 12. In addition, during the operation of the electrical unit 11 (such as the motor unit in a power tool), an abnormal operating state may also occur (such as an overloaded motor resulting in overcurrent, high temperature, or undervoltage in the battery unit 12), which may also interfere with the communication between the electrical unit 11 and the battery unit 12.

[0039] In response to the aforementioned communication interference, the communication control unit 10 switches the communication protocol used in the communication between the electrical unit 11 and the battery unit 12 according to the interference situation in the communication loop, so as to select a communication protocol with better anti-interference performance for communication. When the power transmission parameters are associated with the communication protocol, after switching to another communication protocol for communication, the power transmission between the electrical unit 11 and the battery unit 12 will also be carried out according to the power transmission parameters specified in the other communication protocol.

[0040] Figure 2A schematic block diagram of the components of the communication control unit 10 is shown. In one embodiment, the communication control unit 10 includes a detection module 101, a judgment module 102, and a switching module 103. The detection module 101 is configured to detect status parameter information related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12, and send the detected status parameter information to the judgment module 102. The judgment module 102 is configured to determine, based on the status parameter information detected by the detection module 101, whether the status parameter information conforms to the specifications in the first communication protocol currently used for communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12, and in response to determining that the status parameter information does not conform to the specifications in the first communication protocol, determine that there is communication interference on the communication lines L2 and L3, and send corresponding interference indication information to the switching module 103. After receiving the interference indication information, the switching module 103 switches the communication protocol currently adopted between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 to another communication protocol with stronger anti-interference ability, for example, switches the first communication protocol to the second communication protocol, and the second communication protocol is more suitable for the current communication interference situation, so that the electrical unit 11 and the battery unit 12 can continue to communicate in the current communication interference environment, and further can continue to perform stable discharging or charging operation actions.

[0041] In one embodiment, the detection module 101 is configured to detect status parameter information related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12, which may be to detect the status parameters of the electrical unit 11 and / or the battery unit 12, or to detect the status parameters related to the charging or discharging process of the electrical unit 11 and / or the battery unit 12. Among them, the status parameters of the electrical unit 11 and / or the battery unit 12 are, for example, electrical signals representing the temperature of the electrical unit 11 or the battery unit 12, electrical signals representing the current voltage or power level of the battery unit 12, parameters representing the electrical energy output ability or the allowable electrical energy input range of the electrical unit 11 and / or the battery unit 12, etc. The status parameters related to the charging or discharging process of the electrical unit 11 and / or the battery unit 12 are, for example, electrical signals representing the magnitude of the voltage and / or current related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12, the interval duration from when the communication control unit 10 sends a communication instruction data packet to the electrical unit 11 and / or the battery unit 12 until it receives a response information data packet from the electrical unit 11 and / or the battery unit 12, whether the length or identifier of the data frame transmitted between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 is correct, whether the communication handshake between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 is normal, etc.

[0042] In one embodiment, the detection module 101 sends the collected status parameter information to the judgment module 102. In response to the received status parameter information, the judgment module 102 determines whether the received status parameter information conforms to the specifications in the communication protocol used for the current communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12, and further determines whether communication interference occurs between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12. When determining whether the status parameter information conforms to the specifications in the current communication protocol, various determination methods can be used. For example, the status parameter can be directly compared with the predetermined value of the relevant parameter specified in the communication protocol specification, or the obtained status parameter can be processed or calculated and then compared with the predetermined value of the relevant parameter in the communication protocol specification. In addition, several judgment thresholds can be obtained by processing or calculating the predetermined values of multiple relevant parameters in the communication protocol specification, and then the status parameter or the status parameter after corresponding processing or calculation is compared with the several judgment thresholds. It can also be determined whether a corresponding event occurs according to a certain event flag bit specified in the communication protocol specification. According to the need, different methods are used to determine whether the received status parameter information conforms to the specifications in the current communication protocol, so as to determine whether there is communication interference on the communication lines L2 and L3.

[0043] During the entire charging or discharging process of the battery unit 12, the communication control unit 10 can be configured to always provide the communication protocol used for communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12. In one embodiment, the judgment module 102 is configured to determine, based on the received status parameter information, whether the status parameter information conforms to the specifications corresponding to the current charging or discharging stage of the battery unit 12 in the first communication protocol, and in response to determining that the status parameter information does not conform to the specification, determine that there is communication interference on the communication lines L2 and L3, and send corresponding interference indication information to the switching module 103.

[0044] During the entire charging or discharging process of the battery cell 12, the voltage or charge of the battery cell 12 changes with the charging time or discharging time. Usually, for different types of batteries, to ensure battery safety and improve battery life, or to adapt to different charger designs, etc., the entire charging process of the battery cell 12 involves multiple charging stages, such as a pre-charging stage, a fast-charging stage, a trickle-charging stage, etc., as well as the switching between different charging stages; the entire discharging process of the battery cell 12 also involves multiple discharging stages, such as constant-current discharging, constant-resistance discharging, constant-power discharging, etc., as well as the switching between different discharging stages. In different charging stages or different discharging stages of the battery cell 12, the specifications in the communication protocol used for communication between the communication control unit 10 and the electrical unit 11 and / or the battery cell 12 can vary according to different charging and discharging stages. In one embodiment, the determination module 102 is configured to determine, based on the received status parameter information, whether the status parameter information conforms to the specifications corresponding to the current charging stage or discharging stage of the battery cell 12 in the first communication protocol. When the status parameter information does not conform to the specification, the determination module 102 determines that there is communication interference on the communication lines L2 and L3, and sends corresponding interference indication information to the switching module 103 so that the switching module 103 can perform relevant communication protocol switching actions. By setting different specifications or protocol parameters of the specifications in the communication protocol used for communication between the electrical unit 11 and / or the battery cell 12 to correspond to different charging stages or different discharging stages of the battery cell 12, the present disclosure enables the communication between the electrical unit 11 and the battery cell 12 to better adapt to different interference conditions that occur in the system when the battery cell 12 is in different stages, thereby improving the stability of the charging or discharging operation of the electrical unit 11 and the battery cell 12.

[0045] In one embodiment, the detection module 101 includes a sampling circuit. The sampling circuit is configured to collect status parameter information related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12. In one example, the sampling circuit collects electrical signals of the magnitude of the voltage and / or current related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12. The detection module 101 sends the sampled electrical signals to the judgment module 102. The judgment module 102 compares the value of the electrical signal with a threshold value to determine whether there is communication interference in the communication lines L2 and L3. Herein, the threshold value is specified in the specification of the first communication protocol currently used for communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12, or is determined based on this specification. If the value of the sampled electrical signal (or the value obtained after processing based on this electrical signal) does not exceed the threshold value, the judgment module 102 considers that the electrical signal conforms to the specification in the first communication protocol, and determines that there is no communication interference (or the degree of communication interference is acceptable) in the communication lines L2 and L3, and does not send interference indication information to the switching module 103. At this time, the switching module 103 does not switch the communication protocol. If the value of the sampled electrical signal (or the value obtained after processing based on this electrical signal) exceeds the threshold value, the judgment module 102 considers that the electrical signal does not conform to the specification in the first communication protocol, determines that there is communication interference in the communication lines L2 and L3, and sends interference indication information to the switching module 103. At this time, the switching module 103 switches the first communication protocol currently used for communication in the communication lines L2 and L3 to the second communication protocol, so that the electrical unit 11 and the battery unit 12 continue to communicate according to the switched second communication protocol.

[0046] The aforementioned threshold value for determining whether there is communication interference can be set based on the normal voltage and / or current magnitude signal values on the power transmission line L1 under the condition of no communication interference, the parameter values of the normal state of the electrical unit 11 or the battery unit 12, and the tolerance of the system to communication interference, on the basis of the specification in the currently used communication protocol.

[0047] Exemplarily, under normal circumstances, the electrical unit 11, according to the first communication protocol, during the process of supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12 through the power transmission line L1, the sampling circuit collects a voltage signal V1 related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12. The detection module 101 sends the voltage signal value V1 in the form of an analog signal to the judgment module 102. After receiving this signal, the judgment module 102 compares it with the voltage threshold V0 determined based on the specifications of the currently used communication protocol. After comparison, when the voltage signal value V1 is less than the threshold V0, the judgment module 102 considers that the voltage signal value V1 conforms to the specifications in the first communication protocol, and determines that the system is in a normal state and does not require a communication protocol switching operation. Therefore, at this time, the judgment module 102 does not send interference indication information to the switching module 103.

[0048] In one embodiment, assume that starting from a certain moment, interference appears in the power network electrically connected to the electrical unit 11 or the working state of the electrical unit 11 is abnormal. The sampling circuit collects a voltage signal V2 related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12 under this interference or abnormal situation. The detection module 101 sends the voltage signal value V2 in the form of an analog signal to the judgment module 102. After receiving this signal, the judgment module 102 compares it with the voltage threshold V0 determined based on the specifications of the currently used communication protocol. After comparison, when the voltage signal value V2 is greater than the threshold V0, the judgment module 102 considers that the voltage signal value V2 does not conform to the specifications in the first communication protocol, and determines that a communication interference has occurred in the system and a communication protocol switching operation is required. Therefore, at this time, the judgment module 102 sends interference indication information to the switching module 103. After receiving this interference indication information, the switching module 103, in response to receiving this interference indication information, switches the communication protocol currently used for communication between the electrical unit 11 and the battery unit 12, that is, the first communication protocol, to the second communication protocol. Thus, after the communication control unit 10 performs a communication handshake between the electrical unit 11 and / or the battery unit 12 according to the second communication protocol, the charging unit 11 supplies electrical energy to the battery unit 12 or obtains electrical energy from the battery unit 12 according to this second communication protocol.

[0049] In one embodiment, the specific amplitude of the voltage threshold V0 can be flexibly set according to the magnitude of interference on the power transmission line L1, the state parameter values of the electrical unit 11 or the battery unit 12, or the tolerance of the system to communication interference. It can also be adaptively adjusted according to the operating conditions of the system under different working conditions. In one embodiment, the voltage threshold can also be a voltage value range, and the determination module makes a comparison by determining whether the collected voltage signal is within the voltage value range. Exemplarily, when the voltage signal collected by the sampling circuit is within the voltage value range, the determination module considers that the collected voltage signal conforms to the specification in the current communication protocol; when the voltage signal collected by the sampling circuit is outside the voltage value range, or when the determination module cannot identify the collected voltage signal, the determination module considers that the collected voltage signal does not conform to the specification in the current communication protocol and determines that communication interference has occurred in the system, and then performs subsequent actions such as sending interference indication information and switching protocols.

[0050] In some embodiments, the sampling time of the sampling signal in the second communication protocol is longer than that of the sampling signal in the first communication protocol. In this way, when communication interference occurs in the system, the second communication protocol is more reliable than the first communication protocol, so that the operation of the entire system is more stable. In one embodiment, the sampling signal in the first communication protocol is an instantaneous value, and the sampling signal in the second communication protocol is a corresponding value obtained by processing data based on the plurality of instantaneous values. For example, the corresponding value is the average value of a plurality of instantaneous values within a period of time. In another embodiment, the sampling signals in both the first communication protocol and the second communication protocol are the average values of a plurality of instantaneous values within a period of time, and the sampling time period of the sampling signal in the second communication protocol is longer than that of the sampling signal in the first communication protocol.

[0051] In one embodiment, the sampling signal is a voltage signal and / or a current signal related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12. In one embodiment, taking the sampling signal as a voltage signal related to the electrical unit 11 supplying electrical energy to the battery unit 12 or obtaining electrical energy from the battery unit 12 as an example. The voltage signal V1 or V2 collected by the sampling circuit can be the voltage instantaneous value collected by the sampling circuit at a specific time point, or the corresponding value obtained by processing data based on the voltage instantaneous value. In one embodiment, the voltage signal V1 or V2 is the voltage average value of a plurality of instantaneous values collected by the sampling circuit within a certain time period, and the voltage average value collected within a certain time period is sent to the determination module 102 for determination, thereby reducing the influence of instantaneous interference on the communication control unit 10 to a certain extent.

[0052] In one embodiment, the detection module 101 may also convert the sampled voltage signal into a digital signal form and send the converted digital signal-form voltage to the determination module 102. The determination module 102 may decide whether to receive the digital signal based on whether the digital signal sent by the detection module 101 meets specific data requirements. In one embodiment, if the digital signal sent by the detection module 101 is 1, the determination module 102 receives the digital signal and considers that the digital signal conforms to the specification in the communication protocol, and then determines that the system is in a normal state and no communication protocol switching action is required. Therefore, at this time, the determination module 102 does not send interference indication information to the switching module 103. In one embodiment, if the digital signal sent by the detection module 101 is 0, the determination module 102 does not receive the digital signal, and then determines that communication interference has occurred in the system and a communication protocol switching action is required. At this time, the determination module 102 sends interference indication information to the switching module 103.

[0053] In one embodiment, the determination module 102 may also receive specific bits in the digital signal and determine whether communication interference has occurred based on whether the specific bits in the received digital signal conform to the specification in the communication protocol. In one embodiment, the specific bits in the digital signal-form voltage may be one or more parity bits. The determination module 102 may check the parity bits of the digital signal-form voltage by setting corresponding one or more parity codes. In one embodiment, when the system is in a normal operating state, if the determination module 102 passes the check of the parity bits of the digital signal-form voltage through the parity code, the determination module 102 receives the digital signal-form voltage and considers that the voltage conforms to the specification in the first communication protocol, and then determines that the system is in a normal state and no communication protocol switching action is required. Therefore, at this time, the determination module 102 does not send interference indication information to the switching module 103. In one embodiment, after the system becomes abnormal starting from a certain moment, if the determination module 102 fails to pass the check of the parity bits of the digital signal-form voltage through the parity code, the determination module 102 does not receive the digital signal-form voltage and considers that the voltage value does not conform to the specification in the first communication protocol, and then determines that communication interference has occurred in the system and a communication protocol switching action is required. At this time, the determination module 102 sends interference indication information to the switching module 103.

[0054] During the period when the electrical unit 11 supplies electrical energy to or obtains electrical energy from the battery unit 12, communication interference between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 may be caused by the following abnormal factors: for example, instantaneous voltages with relatively high voltage values in the power grid, voltage harmonics with relatively high frequencies, etc., which are common forms in the power grid; for example, electromagnetic interference generated by the external environment on the power grid or the electrical unit 11; for another example, instantaneous large currents generated when the power tool encounters a high load during operation; and for still another example, the temperature of the battery unit 12 being too high, etc.

[0055] When any one or several of the above abnormalities occur, communication interference will be generated on the communication line L2 and / or L3. At this time: the interval duration from when the communication control unit 10 sends a communication instruction data packet to the electrical unit 11 and / or the battery unit 12 to when it receives a response information data packet may be too long, or there may be an error in the length of the data frame of the status parameter information transmitted between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12, or an error in the flag part, etc. As long as the status parameter information transmitted between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 does not conform to the specifications in the communication protocol used for the current communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12, it can be regarded as a communication interference situation of the present disclosure, and the present disclosure does not limit this.

[0056] In one embodiment, the determination module 102 may further use the duration for which the value of the sampled electrical signal exceeds the threshold reaching a predetermined duration as a criterion for determination to determine that communication interference has occurred, and in this case, send interference indication information to the switching module 103. In one example, the detection module 101 may include a timing circuit configured to calculate information related to the communication time for communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12. Exemplarily, the timing circuit is configured to record the time interval elapsed from when the communication control unit 10 issues a first communication instruction to the electrical unit 11 and / or the battery unit 12 until the response information to the first communication instruction is received from the electrical unit 11 and / or the battery unit 12. The detection module 101 sends the time interval information to the determination module 102. The determination module 102 compares the time interval information with a predetermined duration T1. In one embodiment, when the time interval is greater than the predetermined duration T1, the determination module 102 determines that the time interval information does not conform to the specifications in the current first communication protocol, and determines that the interference occurring in the power network or the abnormality of the working object has affected the normal communication between the electrical unit 11 and the battery unit 12, and it is necessary to reconfigure the communication protocol being used, thereby sending interference indication information to the switching module 103 to notify the switching module 103 to switch the communication protocol. Again, for example, the timing circuit may also be configured to record the time when the communication control unit 10 issues a first communication instruction to the electrical unit 11 and / or the battery unit 12, and start timing continuously therefrom until the time interval elapsed before the response information to the first communication instruction is received from the electrical unit 11 and / or the battery unit 12, and send the continuous timing duration information to the determination module 102. The determination module 102 compares the continuous timing duration with a predetermined duration T2. In one embodiment, when it is determined that the continuous timing duration is greater than the predetermined duration T2, the determination module 102 determines that the time interval information does not conform to the specifications in the current first communication protocol, and determines that the interference occurring in the power network or the abnormality of the working object has affected the normal communication between the electrical unit 11 and the battery unit 12, and it is necessary to reconfigure the communication protocol being used, thereby sending interference indication information to the switching module 103 to notify the switching module 103 to switch the communication protocol. Among them, the predetermined duration T1 or the predetermined duration T2 is specified in the specifications of the first communication protocol currently used for communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12, or is determined based on the specifications.

[0057] The foregoing first communication instruction for the timing circuit to start timing may be an instruction sent by the communication control unit 10 to the electrical unit 11 and / or the battery unit 12 to request the status parameters of the electrical unit 11 and / or the battery unit 12, or an instruction to transmit charging or discharging related parameters to the electrical unit 11 and / or the battery unit 12, or may be other instructions sent by the communication control unit 10 to the electrical unit 11 and / or the battery unit 12, as long as the electrical unit 11 and / or the battery unit 12 should timely feedback a response message to the communication control unit 10 after receiving the instruction in a normal state.

[0058] The second communication protocol may communicate using the same or different signal types, as well as any suitable communication interface and communication frequency as the first communication protocol, and has a higher anti-interference ability than the first communication protocol. Exemplarily, in one embodiment, the signal type used by the first communication protocol is a digital signal, and the signal type used by the second communication protocol is an analog signal. In another embodiment, the communication frequency of the second communication protocol is different from that of the first communication protocol. For example, the communication frequency of the second communication protocol is lower than that of the first communication protocol. Thus, after switching the first communication protocol to the second communication protocol, the anti-interference ability is improved when using the second communication protocol for communication between the electrical unit 11 and the battery unit 12.

[0059] It can be understood that the second communication protocol is other communication protocols different from the first communication protocol. In one implementation, normally, the current communication control unit 10 communicates with the electrical unit 11 and / or the battery unit 12 using the first communication protocol. When an abnormality occurs, the detection module 101 detects status parameter information related to the electrical unit 11 supplying power to the battery unit 12 or obtaining power from the battery unit 12 and sends it to the judgment module 102. The judgment module 102 determines that the status parameter information does not conform to the specification in the currently used first communication protocol and sends corresponding interference indication information to the switching module 103. The switching module 103 receives the interference indication information and switches the currently used first communication protocol between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 to the second communication protocol.

[0060] After the switching operation is completed, the second communication protocol may or may not be adapted to the current abnormal situation. In one embodiment, the detection module 101 in the communication control unit 10 may be configured to always detect status parameter information related to the electrical unit 11 supplying electrical energy to or obtaining electrical energy from the battery unit 12. Accordingly, the judgment module 102 may be configured to always judge whether the received status parameter information conforms to the specifications in the new communication protocol after switching, that is, the second communication protocol, based on the status parameter information detected by the detection module 101. In this embodiment, if the judgment module 102 determines that the status parameter information conforms to the specifications in the second communication protocol, the communication control unit 10 communicates with the electrical unit 11 and / or the battery unit 12 using the second communication protocol. Accordingly, electrical energy transmission for charging and discharging is performed between the electrical unit 11 and / or the battery unit 12 according to the second communication protocol, that is, the second communication protocol after switching can adapt to the current abnormal situation. If the judgment module 102 determines based on the relevant status parameter information detected by the detection module 101 that the status parameter information does not conform to the specifications in the second communication protocol, the judgment module 102 considers that there is still communication interference on the communication lines L2 and L3, indicating that the second communication protocol still cannot adapt to the current abnormal situation. At this time, the judgment module 102 may still send interference indication information to the switching module 103. After receiving the interference indication information, the switching module 103 performs another communication protocol switching operation, switching the second communication protocol to the third communication protocol, the fourth communication protocol, and so on, until the judgment module 102 determines that the detected status parameter information conforms to the specifications in the communication protocol after switching. Thus, the latest communication protocol switched by the switching module 103 can adapt to the current abnormal situation, and at this time, electrical energy transmission for charging and discharging is performed between the electrical unit 11 and / or the battery unit 12 according to the latest communication protocol that can adapt to the current abnormal situation.

[0061] By providing multiple different communication protocols, the present disclosure can make the range of abnormal situations that the communication protocol can adapt to more complex and broad. Therefore, for different communication interference situations, the present disclosure can better balance communication anti-interference ability, communication efficiency, and the charging and discharging efficiency of the electrical unit and the battery unit.

[0062] Under the communication protocol provided by the communication control unit 10 of the present disclosure, the communication control unit 10 can timely switch the communication protocol between the electrical unit 11 and the battery unit 12 according to the interference conditions occurring in the system. Therefore, during the normal charging of the electrical unit 11 from the battery unit 12 or the normal power acquisition from the battery unit 12, even if there are communication interferences such as harmonics and noise in the power grid, or factors such as large currents causing communication interferences due to special working conditions such as increased load when the electrical unit 11 is operating, the communication between the electrical unit 11 and the battery unit 12 can still be maintained. Thus, the charging or discharging operation of the electrical unit 11 does not need to be interrupted or stopped, and the electrical unit 11 can still continue to supply power to the battery unit 12 or acquire power from the battery unit 12 without an additional restart process for the electrical unit 11 and without stopping the operation of the electrical unit 11. Therefore, the technical solution of the present disclosure can improve the stability of the charging or discharging operation of the electrical unit 11 and the battery unit 12, and can significantly improve the charging or discharging efficiency.

[0063] In power transmission and power distribution, the interferences occurring in the power grid have great randomness. For example, the interference duration and interference magnitude are different. Moreover, the differences in the special working conditions faced by the electrical unit 11 are also large, and the resulting degrees of influence on communication interference are also different. To further improve the flexibility of the solution of the present disclosure and further improve the working efficiency, in one embodiment, the determination module 102 is configured to determine the interference level occurring on the communication lines L2 and L3 based on the status parameter information detected by the detection module 101 related to the electrical unit 11 supplying power to the battery unit 12 or acquiring power from the battery unit 12, and send interference indication information to the switching module 103. The interference indication information indicates the interference level. The switching module 103 is configured to, in response to receiving the interference indication information, switch the first communication protocol currently used for communication between the communication control unit 10 and the electrical unit 11 and / or the battery unit 12 to another communication protocol corresponding to the interference level indicated by the interference indication information. Among them, the communication protocols corresponding to different interference levels are different.

[0064] In one embodiment, the judgment module 102 sets at least a first threshold and a second threshold. When the correlation value detected by the detection module 101 is less than the first threshold, the judgment module 102 determines that no communication interference occurs on the communication lines L2 and L3. When the correlation value detected by the detection module 101 is greater than the first threshold and less than the second threshold, the judgment module 102 determines that a first-level communication interference corresponding to the first threshold occurs on the communication lines L2 and L3. When the correlation value detected by the detection module 101 is greater than the second threshold, the judgment module 102 determines that a second-level communication interference corresponding to the second threshold occurs on the communication lines L2 and L3. Among them, the interference intensity of the second-level communication interference is greater than the interference intensity of the first-level communication interference. Therefore, the third communication protocol switched by the switching module 103 after receiving the second-level communication interference should be different from the second communication protocol switched after receiving the first-level communication interference. For example, the anti-interference ability of the third communication protocol should be higher than that of the second communication protocol to adapt to the second-level communication interference with relatively greater interference intensity. The first threshold and / or the second threshold are specified in the specification of the communication protocol currently used when the communication control unit 10 communicates with the electric unit 11 and / or the battery unit 12 , or are determined based on the specification.

[0065] By providing interference level indications for multiple gears and providing different communication protocols in a targeted manner, it is possible to provide more suitable communication protocols for different communication interference situations, thereby taking into account both communication anti-interference capability and communication efficiency (as well as the charging and discharging efficiency of electrical units and battery units).

[0066] It should be noted that after switching from the first communication protocol to the second communication protocol, the communication control unit 10 can continue to detect and determine the communication interference situation on the communication lines L2 and L3, and when it is determined that the communication interference on the communication lines L2 and L3 is weakened or eliminated, the judgment module 102 in the communication control unit 10 again instructs the switching module 103 to switch the second communication protocol used in the current communication back to the first communication protocol. In addition, in an embodiment in which the judgment module 102 can provide interference level information, after switching the communication protocol once, the communication control unit 10 can continue to detect and determine the communication interference situation on the communication lines L2 and L3, and when it is determined that the communication interference level on the communication lines L2 and L3 is upgraded or downgraded, the judgment module 102 in the communication control unit 10 again instructs the switching module 103 to switch the communication protocol used in the current communication to a communication protocol corresponding to a higher interference level or a communication protocol corresponding to a lower interference level.

[0067] In one embodiment, the detection status parameter information of the communication control unit 10 in each of the foregoing embodiments, the determination of communication interference on the communication lines L2 and L3, and the operation of switching communication protocols can be continuously and repeatedly executed during the complete charging stage or discharging stage of the battery unit 12, so that communication interference can be detected and the communication protocol can be switched accordingly in a timely manner at any time during the charging stage or discharging stage. The complete charging stage includes, but is not limited to, a pre-charging stage, a fast-charging stage, a trickle-charging stage, etc. during the process of the electrical unit 11 supplying electrical energy to the battery unit 12. The complete discharging stage includes, but is not limited to, a constant-current discharging, a constant-resistance discharging, a constant-power discharging, etc. of the battery unit 12 during the process of the electrical unit 11 obtaining electrical energy from the battery unit 12.

[0068] The electrical unit 11 in the present disclosure may, for example, be a component in an electric appliance such as a power tool to obtain electrical energy from the battery unit 12, or it may also be a component in a charging device such as a charging apparatus to supply electrical energy to the battery unit 12. The present disclosure is not intended to limit the type of the electrical unit 11. If the electrical unit 11 is a component in an electric appliance, the electric appliance may further have a housing, a drive motor disposed in the housing, a switch for controlling the working state of the drive motor, and a receiving space for connecting or accommodating the battery unit 12, etc. At this time, the battery unit 12 provides working electrical energy for the electric appliance 11. If the electrical unit 11 is a component in a charging device, the charging device may further have a housing, a power conversion component disposed in the housing, a switch for controlling the start and stop of the operation of the power conversion component, and a receiving space for connecting or accommodating the battery unit 12, etc. At this time, the charging device provides working electrical energy for the battery unit 12 to charge the battery unit 12. The battery unit 12 is used to be electrically connected to the electric appliance 11 or the charging device 11. The battery type may be any type such as a lithium-ion battery, a lithium battery, a nickel-metal hydride battery, etc.; the placement position may be within the battery receiving space of the electric appliance 11 or the charging device 11, or may be outside the electric appliance 11 or the charging unit 11.

[0069] Figure 3 A schematic block diagram showing the working mode of the communication control unit 10 according to an embodiment of the present disclosure is shown. In one embodiment, the electrical unit 11 is a component in the charging device 20 (charging unit 11'). The charging device 20 includes a charging unit 11' and a communication control unit 10', and communicates with the battery unit 12' based on one of at least two communication protocols provided by the communication control unit 10'. The communication protocol for communication between the charging device 20 and the battery unit 12' is a charging communication protocol. The charging device 20 supplies electrical energy to the battery unit 12' according to the charging communication protocol provided by the communication control unit 10'.

[0070] According to the communication protocol between the charging unit 11' and the battery unit 12' provided by the communication control unit 10', the charging unit 11' supplies electrical energy to the battery unit 12', and according to different communication protocols provided by the communication control unit 10', the charging unit 11' supplies electrical energy to the battery unit 12' in different modes. The communication control unit 10' can detect changes in status parameters related to the supply of electrical energy from the charging unit 11' to the battery unit 12', so as to switch to a suitable communication protocol.

[0071] Figure 4 The schematic block diagram showing the working mode of the communication control unit 10 according to another embodiment of the present disclosure is shown. In this embodiment, the electrical unit 11 can be a component in an electric appliance such as an electric tool 30, for example, a drive control unit 11" for driving and controlling the operation of the electric tool 30. The communication control unit 10" is used to provide communication between the drive control unit 11" and the battery unit 12". The drive control unit 11" is configured to obtain electrical energy from the battery unit 12". In electric tools 30 such as a cutting machine and a drill, the drive control unit 11" can control the motor by controlling power devices. According to the communication protocol between the communication control unit 10" and the drive control unit 11" and / or the battery unit 12" provided by the communication control unit 10", the drive control unit 11" obtains electrical energy from the battery unit 12", and according to different communication protocols provided by the communication control unit 10", the drive control unit 11" obtains electrical energy from the battery unit 12" in different modes. The communication control unit 10" can detect changes in status parameters related to the acquisition of electrical energy from the battery unit 12" by the drive control unit 11", so as to switch to a suitable communication protocol.

[0072] Figure 5 The schematic block diagram showing the working mode of the communication control unit according to still another embodiment of the present disclosure. The battery device 40 is configured to obtain electrical energy from the charging device 20"' or supply electrical energy to the electric tool 20"' based on one of at least two communication protocols provided by the communication control unit 10"'. In Figure 5In an embodiment, the communication control unit 10”’ and the battery unit 12”’ are jointly disposed in the housing of the battery device 40, as exemplarily shown by the dashed box. According to the communication protocol provided by the communication control unit 10”’ between the communication control unit 10”’ and the charging device 20”’ / power tool 20”’ and / or the battery unit 12”’, the charging device 20”’ supplies electrical energy to the battery unit 12”, or the power tool 20”’ obtains electrical energy from the battery unit 12”, and according to different communication protocols provided by the communication control unit 10”’, the mode in which the charging device 20”’ supplies electrical energy to the battery unit 12” or the power tool 20”’ obtains electrical energy from the battery unit 12” is different. The communication control unit 10”’ can detect the change in the state parameters related to the charging device 20”’ supplying electrical energy to the battery unit 12” or the power tool 20”’ obtaining electrical energy from the battery unit 12”, so as to switch the appropriate communication protocol.

[0073] Figure 6 FIG. 4 is a schematic flowchart of a communication control method according to another embodiment of the present disclosure, for providing communication between an electrical unit and a battery unit. The method includes step S1: electrically connecting the electrical unit and the battery unit; step S2: in response to the electrical connection between the electrical unit and the battery unit, activating a first communication protocol, and communicating between the electrical unit and the battery unit based on the first communication protocol; step S3: determining communication interference occurring between the communication control unit and the electrical unit and / or the battery unit during the electrical unit supplying electrical energy to the battery unit or obtaining electrical energy from the battery unit; step S4: in response to determining the communication interference, closing the first communication protocol and activating a second communication protocol, and communicating between the electrical unit and the battery unit based on the second communication protocol, where the anti-interference ability of the second communication protocol is higher than that of the first communication protocol.

[0074] The communication control unit or communication control method of the present disclosure can be applied to any scenario or system that requires communication handshake between an electrical device and a battery device, not limited to the scenario where a charging unit charges a battery unit, and can also be applied to scenarios where a battery device supplies electrical energy to other electric appliances such as grinders, cutters, electric drills, etc.

[0075] In general, the various embodiments of the present disclosure may be implemented in hardware or specific circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, a microprocessor, or other computing devices. Although the various aspects of the present disclosure are shown and described as block diagrams, flowcharts, or using other graphical representations, it will be understood that the block diagrams, devices, systems, techniques, or methods described herein may be implemented in a non-limiting manner in hardware, software, firmware, specific circuits or logic, general hardware or controllers, or other computing devices, or some combination thereof.

[0076] Moreover, although the operations are described in a particular order, this should not be construed as requiring such operations to be performed in the order shown or in a sequential sequence, or that all of the illustrated operations be performed to achieve the desired result. In some cases, multitasking or parallel processing may be advantageous. Similarly, although details of several specific implementations are included in the foregoing discussion, these should not be construed as any limitation on the scope of the present disclosure, but rather the description of features is merely directed to specific embodiments. Certain features described in separate embodiments may also be implemented in combination in a single embodiment. Conversely, the various features described in a single embodiment may also be implemented separately in multiple embodiments or in any suitable sub-combination.

[0077] Although the present disclosure is described in terms of specific structural features and / or methodological acts, it is understood that the present disclosure as defined in the appended claims is not necessarily limited to the above-described specific features or acts. Rather, the above-described specific features and acts are disclosed only as example forms for implementing the claims.

Claims

1. A communication control unit (10, 10', 10", 10''') for establishing a communication line (L2, L3) between an electrical unit (11, 11', 11", 11''') and a battery unit (12, 12', 12", 12'''), wherein, There is a power transmission line (L1) between the electrical unit (11, 11', 11", 11''') and the battery unit (12, 12', 12", 12'''), and the communication control unit (10, 10', 10", 10''') is configured to: In response to determining that communication interference occurs between the communication control unit (10, 10', 10", 10''') and the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''') during the electrical unit (11, 11', 11", 11''') supplying electrical energy to the battery unit (12, 12', 12", 12''') or obtaining electrical energy from the battery unit (12, 12', 12", 12'''), switch the first communication protocol currently used for communication between the communication control unit (10, 10', 10", 10''') and the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''') to a second communication protocol, where the anti-interference ability of the second communication protocol is higher than that of the first communication protocol.

2. The communication control unit (10, 10', 10", 10''') according to claim 1, wherein, The communication frequency of the second communication protocol is different from that of the first communication protocol.

3. The communication control unit (10, 10', 10", 10''') according to claim 1, wherein, The signal type adopted by the first communication protocol is a digital signal, and the signal type adopted by the second communication protocol is an analog signal.

4. The communication control unit (10, 10', 10", 10''') according to claim 1, wherein, The sampling time of the sampling signal in the second communication protocol is longer than that of the sampling signal in the first communication protocol.

5. The communication control unit (10, 10', 10", 10''') according to claim 4, wherein, The sampling signal in the first communication protocol is an instantaneous value, and the sampling signal in the second communication protocol is an average value over a period of time.

6. The communication control unit (10, 10', 10", 10''') according to claim 4 or 5, wherein, The sampling signal is a voltage signal and / or a current signal characterizing the supply of electrical energy from the electrical unit (11, 11', 11", 11''') to the battery unit (12, 12', 12", 12''') or the obtaining of electrical energy from the battery unit (12, 12', 12", 12''').

7. The communication control unit (10, 10', 10", 10''') according to claim 1, wherein, The communication control unit (10, 10', 10", 10''') includes a detection module (101), a judgment module (102), and a switching module (103); The detection module (101) is configured to detect status parameter information related to the electrical unit (11, 11', 11", 11''') supplying electrical energy to or obtaining electrical energy from the battery unit (12, 12', 12", 12'''), and send the status parameter information to the judgment module (102); The judgment module (102) is configured to, based on the received status parameter information, judge whether the status parameter information conforms to the specifications in the first communication protocol used when the communication control unit (10, 10', 10", 10''') communicates with the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''') currently, and in response to determining that the status parameter information does not conform to the specifications in the first communication protocol, determine that there is communication interference on the communication line (L2, L3), and send corresponding interference indication information to the switching module (103); The switching module (103) is configured to, in response to the received interference indication information, switch the first communication protocol used when the communication control unit (10, 10', 10", 10''') communicates with the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''') currently to the second communication protocol.

8. The communication control unit (10, 10', 10", 10''') according to claim 7, wherein The judgment module (102) is configured to determine the interference level occurring on the communication line (L2, L3) based on the status parameter information detected by the detection module (101), and send interference indication information indicating the interference level to the switching module (103); and The switching module (103) is configured to, in response to receiving the interference indication information, switch the first communication protocol used when the communication control unit (10, 10', 10", 10''') communicates with the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''') currently to another communication protocol corresponding to the interference level indicated by the interference indication information; wherein The communication protocols corresponding to different interference levels are different.

9. The communication control unit (10, 10', 10", 10''') according to claim 7 or 8, wherein The status parameter information is an electrical signal characterizing the magnitude of voltage and / or current related to the electrical unit (11, 11', 11", 11''') supplying electrical energy to or obtaining electrical energy from the battery unit (12, 12', 12", 12'''); The detection module (101) includes a sampling circuit configured to collect the electrical signal and send the electrical signal to the judgment module (102); The judgment module (102) is configured to issue the interference indication information to the switching module (103) in response to determining that the electrical signal does not conform to the specification in the first communication protocol.

10. The communication control unit (10, 10', 10", 10''') according to claim 7 or 8, wherein, The status parameter information is the first time interval value from when the communication control unit (10, 10', 10", 10''') issues a first communication instruction to the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''') until the response information to the first communication instruction is received from the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12'''), or is the second time interval value from after the communication control unit (10, 10', 10", 10''') issues a first communication instruction to before the response information to the first communication instruction is received from the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12'''); The detection module (101) includes a timing circuit configured to record the first time interval value or the second time interval value and send the first time interval value or the second time interval value to the judgment module (102); The judgment module (102) is configured to issue the interference indication information to the switching module (103) in response to determining that the first time interval value or the second time interval value is greater than a predetermined value.

11. The communication control unit (10, 10', 10", 10''') according to claim 10, wherein, The first communication instruction is an instruction for the communication control unit (10, 10', 10", 10''') to request the status parameters of the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''') from the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12'''), or is an instruction for transmitting charging or discharging related parameters to the electrical unit (11, 11', 11", 11''') and / or the battery unit (12, 12', 12", 12''').

12. The communication control unit (10, 10', 10", 10''') according to claim 7 or 8, wherein, The determination module (102) is configured to determine, based on the received status parameter information, whether the status parameter information conforms to a specification corresponding to a current charging stage or discharging stage of the battery unit (12, 12’, 12”, 12”’) in the first communication protocol, and in response to determining that the status parameter information does not conform to the specification, determine that there is communication interference on the communication line (L2, L3), and send corresponding interference indication information to the switching module (103).

13. A charging device (20), comprising a charging unit (11’) and a communication control unit (10’) according to any one of claims 1 - 12, wherein, the charging unit (11’) is configured to provide electrical energy for a battery unit (12’) connected to the charging device (20) based on one of at least two communication protocols provided by the communication control unit (10’).

14. An electric appliance (30), comprising a drive control unit (11”) and a communication control unit (10”) according to any one of claims 1 - 12, wherein, the drive control unit (11”) is configured to obtain electrical energy from a battery unit (12”) installed on the electric appliance (30) based on one of at least two communication protocols provided by the communication control unit (10”).

15. A battery device (40), comprising a battery unit (12”’) and a communication control unit (10”’) according to any one of claims 1 - 12, wherein, the battery unit (12”’) is configured to obtain electrical energy from a charging device (20”’) or provide electrical energy to an electric appliance (20”’) based on one of at least two communication protocols provided by the communication control unit (10”’).

16. A communication control method for providing communication between an electrical unit and a battery unit, the method comprising: Step one (S1): electrically connecting the electrical unit and the battery unit; Step two (S2): in response to the electrical unit and the battery unit being electrically connected, activating a first communication protocol, and communicating between the electrical unit and the battery unit based on the first communication protocol; Step three (S3): determining that there is communication interference between the communication control unit and the electrical unit and / or the battery unit during the electrical unit providing electrical energy to the battery unit or obtaining electrical energy from the battery unit; and Step four (S4): in response to determining that the communication interference occurs, closing the first communication protocol and activating a second communication protocol, and communicating between the electrical unit and the battery unit based on the second communication protocol, wherein the anti-interference ability of the second communication protocol is higher than that of the first communication protocol.

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