A charging and discharging control system, method and battery pack

Abstract

The application provides a charging and discharging control system, method and battery pack, supports a USB PD fast charging protocol, can detect a device type of an access device on a Type-C interface in real time, and performs charging / discharging on the battery pack according to the device type, so that not only fast charging can be performed through the Type-C interface, but also fast discharging can be performed for the access device with the Type-C interface, thereby facilitating use of a user; and in the charging / discharging process, technical parameters of the battery pack are detected in real time, charging / discharging protection logic is executed according to the technical parameters, input / output power is dynamically adjusted, the safety of the battery pack can be effectively protected, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] This invention relates to the field of battery pack technology, and in particular to a charging and discharging control system, method, and battery pack. Background Technology

[0002] In recent years, with the development of battery material technology, the application scope of lithium batteries has been greatly expanded. They are now widely used in power tools and garden tools, where power is supplied to the tools via power terminals.

[0003] Garden tools are maintenance equipment for human landscaping. They are mechanized tools used to maintain lawns, hedges, and protect flowers, grasses, and trees, replacing most manual labor.

[0004] Garden tools are powered by battery packs. Currently, the charging and discharging interfaces of battery packs generally use mechanical terminals, which have a single input and output voltage, resulting in poor compatibility with connected devices, limited applicability, and inconvenience for users. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a charging and discharging control system, method and battery pack, to solve the problems that the battery packs in the prior art generally use mechanical terminals as charging and discharging interfaces, have a single output voltage, resulting in poor compatibility with connected devices, limited applicability and inconvenience for users.

[0006] A first aspect of the present invention provides a charging and discharging control system for a battery pack that uses a Type-C interface for charging and discharging;

[0007] The control system is used to detect the device type of the device connected to the Type-C interface, and to charge / discharge the battery pack according to the device type; wherein, the device type includes charging devices and discharging devices.

[0008] In one embodiment of the present invention, the control system includes:

[0009] The detection module is used to acquire the battery parameters of the cell assembly and the circuit parameters of the Type-C circuit of the battery pack in real time.

[0010] The control module is used to determine the device type of the connected device based on the interface signal of the Type-C interface; it is also used to output control signals to the voltage regulation module based on the device type, the battery parameters, and the circuit parameters.

[0011] A voltage regulating module is connected in series between the battery cell assembly and the Type-C interface, and its control terminal is electrically connected to the control module, for adjusting the input / output voltage of the battery cell assembly according to the control signal of the control module;

[0012] The battery parameters include the voltage, current, and temperature of the cell assembly;

[0013] The loop parameters include loop voltage, loop current, power device temperature, and input / output voltage.

[0014] In one embodiment of the present invention, the control module includes:

[0015] The first control unit is used to obtain the battery pack status according to the battery parameters and transmit it to the second control unit;

[0016] The second control unit is used to determine the device type of the connected device based on the interface signal of the Type-C interface; it is also used to output control signals to the voltage regulation module based on the device type, the battery pack status and the circuit parameters.

[0017] In one embodiment of the present invention, the battery pack status includes: abnormal, normal, charging protection, and discharging protection;

[0018] If any of the following conditions are met: the voltage of the battery cell assembly is less than a preset first threshold, greater than a preset fourth threshold, or the temperature is greater than a preset temperature threshold, then the battery pack is in an abnormal state and charging / discharging is not allowed.

[0019] If the voltage of the battery cell assembly is between the preset second threshold and the third threshold, the battery pack is in normal condition and can be charged / discharged.

[0020] If the voltage of the battery cell assembly is between a preset first threshold and a second threshold, the battery pack is in charging protection mode and is only used for charging.

[0021] If the voltage of the battery cell assembly is between the preset third threshold and the fourth threshold, the battery pack is in discharge protection mode and is only used for discharging.

[0022] The voltage values ​​of the first threshold, the second threshold, the third threshold, and the fourth threshold increase sequentially.

[0023] In one embodiment of the present invention, the detection module includes:

[0024] The first detection unit is used to acquire the battery parameters in real time and transmit them to the first control unit;

[0025] The second detection unit is used to acquire the loop parameters in real time and transmit them to the second control unit.

[0026] In one embodiment of the present invention, the voltage regulating module includes:

[0027] The full-bridge drive unit is used to output a drive signal to the full-bridge power unit according to the control signal of the second control unit;

[0028] A full-bridge power unit is connected in series between the Type-C interface and the battery cell assembly, and its control terminal is connected to the full-bridge drive unit to adjust the input / output voltage of the battery cell assembly according to the drive signal.

[0029] In one embodiment of the present invention, the control system further includes:

[0030] An activation unit is used to activate the first control unit according to an activation signal; the activation signal is obtained through the connection status of the Type-C interface and / or by pressing the activation button.

[0031] The first control unit is also configured to detect the status of the battery pack after being activated, and if the status of the battery pack is not abnormal, then activate the second control unit.

[0032] A Type-C communication unit is connected in series between the second control unit and the Type-C interface for communicating between the second control unit and the access device on the Type-C interface;

[0033] The Type-C protection unit is connected in series between the full-bridge power unit and the Type-C interface, and its control terminal is connected to the second control unit for charging / discharging protection according to the protection command of the second control unit.

[0034] The second control unit is also used to output protection commands to the Type-C protection unit according to the battery pack status and the circuit parameters.

[0035] In one embodiment of the present invention, the battery pack further includes a power supply terminal; the control system is further configured to detect the device type of the device connected to the power supply terminal, and charge / discharge the battery pack according to the Type-C interface and / or the device type of the device connected to the power supply terminal.

[0036] In one embodiment of the present invention, the control system further includes:

[0037] The activation signal received by the activation unit can also be obtained through one or more of the connection status of the Type-C interface, the connection status of the power supply terminal, or pressing the activation button;

[0038] A terminal communication unit is connected in series between the power supply terminal and the first control unit for communicating between the first control unit and the access device on the power supply terminal.

[0039] A terminal protection unit is connected in series between the power supply terminal and the battery cell assembly, and its control terminal is connected to the first control unit for charging / discharging protection according to the protection command of the first control unit.

[0040] The first control unit is also used to output protection commands to the terminal protection unit according to the battery parameters.

[0041] In one embodiment of the present invention, the second control unit is further configured to transmit the device type of the device accessed on the Type-C interface to the first control unit;

[0042] The first control unit is further configured to determine the device type of the connected device based on the interface signal of the power supply terminal; to set the battery pack operating conditions based on the connection status of the connected device and the battery pack charging / discharging status; and to charge / discharge the battery pack according to the device type and the battery pack operating conditions.

[0043] The battery pack operating conditions include charging mode, discharging mode, and idle mode.

[0044] A second aspect of the present invention provides a charging and discharging control method, applied to a battery pack that uses a Type-C interface for charging / discharging; the control method includes:

[0045] Detect the device type of the device connected to the Type-C interface;

[0046] The battery pack is charged / discharged according to the device type; wherein, the device type includes charging device and discharging device.

[0047] In one embodiment of the present invention, the control method further includes:

[0048] Upon receiving the activation signal, the charging and discharging control system is activated;

[0049] The battery pack status is detected. If the battery pack status is not abnormal, it is determined whether there is an access device on the Type-C interface. If there is, a communication handshake is performed with the access device. Otherwise, the battery pack status is set to idle mode.

[0050] If the handshake is successful, determine the type of communication handshake.

[0051] If the communication handshake type is a charging handshake, then it is a charging device; if the communication handshake type is a discharging handshake, then it is a discharging device.

[0052] The battery pack status is obtained by judging battery parameters in real time, including the voltage, current and temperature of the cell assembly.

[0053] In one embodiment of the present invention, the step of charging / discharging the battery pack according to the device type includes:

[0054] If it is a charging device, determine whether a charging request has been received from the charging device. If it is received, determine whether charging is required based on the battery pack status. If charging is required, set the battery pack operating condition to charging mode, charge the battery pack, and execute the charging protection logic.

[0055] If it is a discharge device, determine whether a discharge request has been received from the discharge device. If it has, determine whether it can be discharged based on the battery pack status. If it can, set the battery pack operating condition to discharge mode, discharge the battery pack and execute the discharge protection logic.

[0056] In one embodiment of the present invention, the charging protection logic includes:

[0057] The charging voltage of the battery pack is determined based on the interface signal of the Type-C interface;

[0058] The battery pack is charged according to the charging voltage;

[0059] During the charging process, the circuit parameters are monitored for abnormalities. If abnormalities are found, the circuit voltage and circuit current are adjusted. If the abnormalities persist after adjustment, charging is stopped. The circuit parameters include circuit voltage, circuit current, power device temperature, and input / output voltage.

[0060] Charging is complete when the state of charge of the battery cell assembly exceeds the preset maximum charging value.

[0061] In one embodiment of the present invention, the charging protection logic further includes:

[0062] During charging, the status of the battery pack is monitored in real time;

[0063] If the battery pack is in an abnormal state, charging will stop.

[0064] In one embodiment of the present invention, the discharge protection logic includes:

[0065] The discharge voltage of the battery pack is determined based on the interface signal of the Type-C interface;

[0066] The battery pack is discharged according to the discharge voltage;

[0067] During the discharge process, the circuit parameters are monitored for abnormalities. If abnormalities are found, the circuit voltage and circuit current are adjusted. If the abnormalities persist after adjustment, the discharge is stopped. The circuit parameters include circuit voltage, circuit current, power device temperature, and input / output voltage.

[0068] Discharge is complete when the state of charge of the battery cell assembly is less than the preset minimum discharge value.

[0069] In one embodiment of the present invention, the discharge protection logic further includes:

[0070] During the discharge process, the status of the battery pack is monitored in real time;

[0071] If the battery pack is in an abnormal state, then the discharge will stop.

[0072] In one embodiment of the present invention, it is also applied to a battery pack that uses power supply terminals for charging / discharging; the control method further includes:

[0073] Detect the device type of the device connected to the power supply terminal;

[0074] The battery pack is charged / discharged according to the device type of the device connected to the Type-C interface and / or the power supply terminal.

[0075] In one embodiment of the present invention, the step of charging / discharging the battery pack according to the device type further includes:

[0076] Upon receiving a charging request, the battery pack status is determined. If the battery pack is in non-discharge mode, the system determines whether charging is required based on the battery pack status.

[0077] Upon receiving a discharge request, the battery pack status is assessed. If the battery pack is in non-charging mode, the system determines whether discharge is permissible based on the battery pack status.

[0078] A third aspect of the present invention provides a battery pack, including a charging and discharging control system, a cell assembly, and at least one Type-C interface;

[0079] The control system is connected in series between the Type-C interface and the battery cell assembly. A connection device is detachably connected to the Type-C interface. The control system charges / discharges the battery pack according to the device type of the connection device.

[0080] As described above, the charging and discharging control system, method, and battery pack of the present invention have the following beneficial effects:

[0081] This invention supports the USB PD fast charging protocol and can detect the device type of the device connected to the Type-C interface in real time. It charges / discharges the battery pack according to the device type, enabling not only fast charging via the Type-C interface but also fast discharging for devices with a Type-C interface. The charging / discharging power can be adjusted within a certain range based on the connected device, making it suitable for various voltage-sensitive devices and convenient for users. Furthermore, during charging / discharging, the technical parameters of the battery pack are monitored in real time, and charging / discharging protection logic is executed based on these parameters, dynamically adjusting the input / output power to effectively protect the battery pack and extend its lifespan. Attached Figure Description

[0082] Figure 1 The diagram shown is a structural block diagram of a battery pack disclosed in an embodiment of the present invention.

[0083] Figure 2 This is shown as another structural block diagram of the battery pack disclosed in an embodiment of the present invention.

[0084] Figure 3 The diagram shown is a structural block diagram of a charging and discharging control system disclosed in an embodiment of the present invention.

[0085] Figure 4 This is shown as another structural block diagram of the charging and discharging control system disclosed in an embodiment of the present invention.

[0086] Figure 5 This is shown as another structural block diagram of the charging and discharging control system disclosed in an embodiment of the present invention.

[0087] Figure 6 The diagram shown is a schematic representation of the internal communication connections of the control module disclosed in an embodiment of the present invention.

[0088] Figure 7 The diagram shows the workflow of the charging and discharging control method disclosed in this embodiment of the invention.

[0089] Figure 8 This is a schematic diagram illustrating the workflow of the detection equipment type disclosed in this embodiment of the invention.

[0090] Figure 9 The diagram shows the workflow of the charging protection logic disclosed in this embodiment of the invention.

[0091] Figure 10 The diagram shows the workflow of the discharge protection logic disclosed in this embodiment of the invention.

[0092] Figure 11 The diagram shows a workflow of another charging and discharging control method disclosed in an embodiment of the present invention.

[0093] Component designation explanation:

[0094] 100 - Battery pack; 110 - Activation unit; 120 - Cell assembly; 122 - Type-C interface;

[0095] 132 - Power supply terminal; 151 - Terminal protection unit; 152 - Type-C protection unit; 160 - Voltage regulation module;

[0096] 1601 - Full-bridge drive unit; 1602 - Full-bridge power unit; 170 - Detection module;

[0097] 1701 - First detection unit; 1702 - Second detection unit; 180 - Control module;

[0098] 1801 - First control unit; 1802 - Second control unit; 191 - Terminal communication unit;

[0099] 192-Type-C communication unit. Detailed Implementation

[0100] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0101] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0102] Please see Figure 1 The present invention discloses a charging and discharging control system, which is applied to a battery pack 100 that uses a Type-C interface 122 for charging / discharging. It should be understood that the battery pack 100 includes a cell assembly 120, which includes multiple cells. The cells can be combined in series and parallel to form the cell assembly 120. The cell assembly 120 is used to store electrical energy and can be charged / discharged through the Type-C interface 122.

[0103] The control system is connected in series between the Type-C interface 122 and the cell assembly 120 of the battery pack 100. It is used to detect the device type of the device connected to the Type-C interface 122 and charge / discharge the battery pack 100 through the Type-C interface 122 according to the device type. The device type includes charging devices and discharging devices.

[0104] It should be understood that the aforementioned Type-C interface 122 is a standard USB interface, a reversible type that can be plugged in either direction, and supports the USB Power Delivery Specification (USB fast charging standard). In this embodiment, the Type-C interface 122 pins include VBUS, CC, D+, D-, and GND.

[0105] In addition, the communication protocol of the Type-C interface 122 is not limited to the aforementioned standardized USB PD fast charging protocol, but also supports proprietary protocols. Proprietary protocols are generally designed by each manufacturer according to their own circumstances, and this solution does not impose any restrictions on them.

[0106] Correspondingly, the access device is also equipped with a Type-C interface 122, and the interaction between the access device and the battery pack 100 should meet the Type-C general communication protocol and proprietary protocol. Among them, when the access device is a charging device, it can be a gallium nitride charger; when the access device is a discharging device, it can be various power tools and garden tools, or it can be a mobile phone, laptop, Bluetooth speaker and other power-consuming devices.

[0107] Please see Figure 2 In this embodiment, the battery pack 100 also includes a power supply terminal 132. The control system is also used to detect the device type of the device connected to the power supply terminal 132, and charge / discharge the battery pack 100 through the power supply terminal 132 according to the device type.

[0108] It should be understood that the power supply terminal 132 is a commonly used connection port in garden tools, and there are various models available. In this embodiment, its pins include: P+, CHG, COM, and P-.

[0109] It should be noted that this embodiment includes only one Type-C interface 122 and one power supply terminal 132. In actual applications, multiple Type-C interfaces 122 can be set as needed. By adjusting the charging or discharging power, the charging and discharging speed can be accelerated, making it more convenient for users.

[0110] Please see Figure 3 The control system includes: a detection module 170, a control module 180, and a voltage regulation module 160.

[0111] The detection module 170 is used to acquire the battery parameters of the cell assembly 120 and the circuit parameters of the Type-C circuit in real time. The battery parameters include the voltage, current and temperature of the cell assembly 120; the circuit parameters include the circuit voltage, circuit current, power device temperature and input / output voltage.

[0112] It should be understood that the Type-C circuit is the relevant circuit inside the battery pack 100 from the Type-C interface 122 to the cell assembly 120. In this embodiment, the Type-C circuit includes the Type-C interface 122, the detection module 170, the control module 180, the voltage regulation module 160, and the cell assembly 120.

[0113] The control module 180 is used to determine the device type of the connected device based on the interface signal of the Type-C interface 122; it is also used to output control signals to the voltage regulation module 160 based on the device type, battery parameters and circuit parameters.

[0114] In this embodiment, the detection module 170 and the control module 180 communicate via an I2C bus.

[0115] A voltage regulating module 160 is connected in series between the battery cell assembly 120 and the Type-C interface 122, and its control terminal is electrically connected to the control module 180. It is used to adjust the input / output voltage of the battery cell assembly 120 according to the control signal of the control module 180.

[0116] Please see Figure 4 Optionally, the control module 180 includes: a first control unit 1801 and a second control unit 1802.

[0117] The first control unit 1801 is used to obtain the battery pack status according to the battery parameters and transmit it to the second control unit 1802;

[0118] The second control unit 1802 is used to determine the type of connected device based on the interface signal of the Type-C interface 122; it is also used to output control signals to the voltage regulation module 160 based on the device type, battery pack status and circuit parameters.

[0119] It should be understood that during the charging / discharging process of the battery pack 100, the parameter range of the cell assembly 120 can be preset according to the usage requirements, and the battery pack status can be determined according to the parameter range. In this embodiment, the battery pack status includes abnormal, normal, charging protection and discharging protection. In actual applications, users can further subdivide it according to their needs.

[0120] Specifically, if any of the following conditions are met: the voltage of the battery cell assembly 120 is less than a preset first threshold, greater than a preset fourth threshold, or the temperature is greater than a preset temperature threshold, the battery pack is in an abnormal state and charging / discharging is not allowed.

[0121] If the voltage of the battery cell assembly is between the preset second and third thresholds, the battery pack is in normal condition and can be charged / discharged.

[0122] If the voltage of the battery cell assembly is between a preset first threshold and a second threshold, the battery pack is in charging protection mode and is only used for charging.

[0123] If the voltage of the battery cell assembly is between the preset third and fourth thresholds, the battery pack is in discharge protection mode and is only used for discharging.

[0124] The voltage values ​​of the first threshold, second threshold, third threshold and fourth threshold increase sequentially.

[0125] It should be understood that the first threshold, the second threshold, the third threshold, and the fourth threshold are all preset values, which can be determined according to the specifications of the battery pack 100. The specifications generally include capacity, voltage, charging voltage, charging current, discharging voltage, and discharging current. Users can set these values ​​as needed, and this solution does not limit the specific values.

[0126] Please see Figure 6 The first control unit 1801 can communicate with the second control unit 1802 through various communication methods, including I2C bus communication, UART serial communication, and SPI communication. To improve communication efficiency and anti-interference capability, in this embodiment, four sets of I / O ports are selected from the multiple I / O ports of the first control unit 1801 and the second control unit 1802 to realize data interaction. The specific communication protocol is described as follows:

[0127] The first and second pins of the first control unit 1801 are defined as the first transmitting end, and the third and fourth pins are defined as the first receiving end; the first and second pins of the second control unit 1802 are defined as the second receiving end, and the third and fourth pins are defined as the second transmitting end; and the high level output of the first control unit 1801 and / or the second control unit 1802 is defined as 1, and the low level is defined as 0.

[0128] The first control unit 1801 obtains the battery pack status based on battery parameters and transmits it to the second control unit 1802 through the high and low levels of each pin. The second control unit 1802 charges / discharges the battery pack 100 through the Type-C interface 122 according to the battery pack status. The parameter corresponding to the battery pack status is denoted as OVP.

[0129] The second control unit 1802 performs a general protocol match with the access device on the Type-C interface 122 to determine whether the access device is a charging device or a discharging device, and transmits the high and low levels of each pin to the first control unit 1801.

[0130] The following is a definition of a battery pack state:

[0131] OVP=00, at this time the battery pack is in an abnormal state and charging / discharging is not allowed;

[0132] OVP=01, at this time the battery pack is in a normal state and can be charged / discharged;

[0133] When OVP=10, the battery pack 100 is in a charging protection state and is only used for charging.

[0134] When OVP=11, the battery pack 100 is in discharge protection mode and is only used for discharging.

[0135] It should be noted that the above communication protocol is still applicable to multiple Type-C interfaces 122. Once an access device with a Type-C interface 122 is connected to any Type-C interface 122 and a communication handshake with the second control unit 1802 is successful, the second control unit 1802 can perform data interaction with the first control unit 1801.

[0136] Using this approach, the control system monitors battery and circuit parameters in real time during charging / discharging, executes charging / discharging protection logic based on these parameters, and dynamically adjusts the input / output power, thus achieving safe and fast charging / discharging of the battery pack 100.

[0137] Please see Figure 4 Optionally, the voltage regulating module 160 includes a full-bridge drive unit 1601 and a full-bridge power unit 1602.

[0138] The full-bridge drive unit 1601 is used to output a drive signal to the full-bridge power unit 1602 according to the control signal of the second control unit 1802; wherein, the control signal of the second control unit 1802 is a PWM signal.

[0139] The full-bridge power unit 1602 is connected in series between the Type-C interface 122 and the cell assembly 120, and its control terminal is connected to the full-bridge drive unit 1601 to adjust the input / output voltage of the cell assembly 120 according to the drive signal.

[0140] It should be understood that the full-bridge drive unit 1601 can output a drive signal to the full-bridge power unit 1602 according to the control signal, thereby adjusting the input / output voltage of the cell assembly 120 through the full-bridge power unit 1602.

[0141] Optionally, the detection module 170 includes: a first detection unit 1701 and a second detection unit 1702.

[0142] The first detection unit 1701 is used to acquire battery parameters in real time and transmit them to the first control unit 1801;

[0143] The second detection unit 1702 is used to acquire loop parameters in real time and transmit them to the second control unit 1802.

[0144] To further explain, the control system also includes: activation unit 110.

[0145] The activation unit 110 is used to activate the first control unit 1801 according to the activation signal; the activation signal is obtained by the connection status of the Type-C interface 122 and / or by pressing the activation button; it should be understood that the battery pack 100 is provided with an activation button that controls the on / off of the power circuit, and when the activation button is pressed, an activation signal is generated by pulling up or pulling down.

[0146] The first control unit 1801 is also used to detect the battery pack status after being activated, and if the battery pack status is not abnormal, then activate the second control unit 1802.

[0147] With this approach, the battery pack 100 is in a dormant state when there is no activation signal, at which time both the first control unit 1801 and the second control unit 1802 are powered down. When an activation signal is received, the first control unit 1801 first checks the battery pack status. If the battery pack status is normal, the second control unit 1802 is activated; otherwise, the charging / discharging process is stopped. This not only saves energy but also prevents damage to the battery cell assembly 120.

[0148] In addition, after the battery pack 100 has finished charging / discharging, the first control unit 1801 can also output a control signal to the second control unit 1802 to power it down. The first control unit 1801 then powers down itself after a certain delay, thereby saving energy.

[0149] Continuing the explanation, the control system also includes a Type-C communication unit 192, which is connected in series between the second control unit 1802 and the Type-C interface 122. The second control unit 1802 can communicate with the access device on the Type-C interface 122 through the Type-C communication unit 192, thereby obtaining interface signals through the Type-C interface 122. The interface signals include the device type of the access device, charging request, discharging request, charging voltage, and discharging voltage.

[0150] Further explanation: The control system also includes: Type-C protection unit 152.

[0151] Type-C protection unit 152 is connected in series between full-bridge power unit 1602 and Type-C interface 122, and its control terminal is connected to second control unit 1802 for charging / discharging protection according to protection commands from second control unit 1802.

[0152] The second control unit 1802 is also used to output protection commands to the Type-C protection unit 152 according to the battery pack status and circuit parameters.

[0153] Please see Figure 5 When the battery pack 100 also includes a power supply terminal 132, the control system also includes:

[0154] Terminal protection unit 151 is connected in series between power supply terminal 132 and cell assembly 120, and its control terminal is connected to first control unit 1801 for charging / discharging protection according to protection commands from first control unit 1801.

[0155] The first control unit 1801 is also used to output protection commands to the terminal protection unit 151 according to the battery parameters.

[0156] Continuing the explanation, when the battery pack 100 also includes a power supply terminal 132, the control system also includes:

[0157] Terminal communication unit 191 is connected in series between power supply terminal 132 and first control unit 1801 for communication connection between first control unit 1801 and access device on power supply terminal 132.

[0158] It should be noted that when the battery pack 100 also includes a power supply terminal 132, the activation signal received by the activation unit 110 can be obtained through any one or more of the connection status of the Type-C interface 122, the connection status of the power supply terminal 132, or by pressing the activation button.

[0159] The second control unit 1802 is also used to transmit the device type of the device connected on the Type-C interface 122 to the first control unit 1801;

[0160] The first control unit 1801 is also used to determine the device type of the connected device based on the interface signal of the power supply terminal 132; it is also used to set the battery pack operating conditions based on the connection status of the connected device and the charging / discharging status of the battery pack 100, and to charge / discharge the battery pack 100 according to the device type and the battery pack operating conditions. Specifically:

[0161] After receiving the device type of the device connected to the Type-C interface 122, the first control unit 1801 determines whether the second control unit 1802 has received a charging request from the charging device. If a charging request is received, the first control unit 1801 determines the battery pack operating condition. If the battery pack operating condition is non-discharging mode, it determines whether the battery pack 100 needs to be charged based on the battery pack status. If it needs to be charged, the second control unit 1802 controls the battery pack 100 to charge. If the device is a discharging device, it determines whether the second control unit 1802 has received a discharging request from the discharging device. If a discharging request is received, the first control unit 1801 determines the battery pack operating condition. If the battery pack operating condition is non-charging mode, it determines whether it can be discharged based on the battery pack status. If it can be discharged, the second control unit 1802 controls the battery pack 100 to discharge.

[0162] The first control unit 1801 determines the device type of the device connected to the power supply terminal 132. If it is a charging device, it determines whether a charging request has been received from the charging device. If a charging request has been received, it determines the battery pack operating condition. If the battery pack operating condition is non-discharge mode, it determines whether the battery pack 100 needs to be charged based on the battery pack status. If it needs to be charged, it charges the battery pack 100. If it is a discharging device, it determines whether a discharging request has been received from the discharging device. If a discharging request has been received, it determines the battery pack operating condition. If the battery pack operating condition is non-charging mode, it determines whether it can be discharged based on the battery pack status. If it can be discharged, it discharges the battery pack 100.

[0163] The battery pack operating conditions include charging mode, discharging mode, and idle mode, specifically:

[0164] When the battery pack 100 starts charging through the Type-C interface 122 and / or the power supply terminal 132, the first control unit 1801 sets the battery pack operating condition to charging mode.

[0165] When the battery pack 100 starts discharging through the Type-C interface 122 and / or the power supply terminal 132, the first control unit 1801 sets the battery pack operating condition to discharge mode.

[0166] When no device is connected to the Type-C interface 122 or the power supply terminal 132, the first control unit 1801 sets the battery pack operating condition to idle mode.

[0167] This approach ensures that the battery pack 100 is only in a charging or discharging state at any given time, preventing damage to the battery pack 100 caused by incorrect connection by the user.

[0168] It should be noted that when there is a connected device on the power supply terminal 132 but no connected device is detected on the Type-C interface 122, the first control unit 1801 also outputs a control signal to the second control unit 1802 to put it into sleep mode and save power. The second control unit 1802 will only be activated again when the first control unit 1801 receives the activation signal again and the battery pack status is not abnormal.

[0169] It should be noted that the first processing unit and the second processing unit in the above embodiments are typically the central processing unit (CPU) of the entire microcomputer digital display sensor processor system. They can be configured with corresponding operating systems and control interfaces. Specifically, they can be digital logic processors capable of automation control, such as microcontrollers, DSPs (Digital Signal Processing), and ARM processors (Advanced RISC Machines). They can load control instructions into memory for storage and execution at any time. At the same time, they can have built-in CPU instruction and data memory, input / output units, power supply modules, digital and analog units, etc. The specific configuration can be set according to the actual use situation, and this solution does not impose any restrictions on this.

[0170] As can be seen, the control system in the above embodiments is applied to the battery pack 100 that uses the Type-C interface 122 and / or power supply terminal 132 for charging / discharging. It supports the USB PD fast charging protocol and can detect the device type of the device connected to the Type-C interface 122 and / or power supply terminal 132 in real time. Based on the device type, it charges / discharges the battery pack 100. It can not only perform fast charging through the Type-C interface 122 and / or power supply terminal 132, but also perform fast discharging for connected devices with the Type-C interface 122 and / or power supply terminal 132. Moreover, the charging / discharging power can be adjusted within a certain range according to the connected device, making it suitable for various connected devices with different voltages, which is convenient for users. During the charging / discharging process, the system can detect the technical parameters of the battery pack 100 in real time, execute the charging / discharging protection logic based on the technical parameters, and dynamically adjust the input / output power, which can effectively protect the safety of the battery pack 100 and extend its service life.

[0171] Please see Figure 7 Another embodiment of the present invention discloses a charging and discharging control method applied to a battery pack 100 that uses a Type-C interface 122 for charging / discharging. The control method includes:

[0172] The device type of the device connected to the Type-C interface 122 is detected, and the battery pack 100 is charged / discharged according to the device type; the device type includes charging devices and discharging devices.

[0173] Optionally, the control methods also include:

[0174] Upon receiving the activation signal, the charging and discharging control system is activated;

[0175] The battery pack status is detected. If the battery pack status is not abnormal, it is determined whether there is a connected device on the Type-C interface 122. The battery pack status is obtained by judging the battery parameters in real time, including the voltage, current and temperature of the cell assembly 120.

[0176] With this approach, the battery pack 100 is in a dormant state when there is no activation signal, and only starts the charging or discharging process after receiving an activation signal and when the battery pack is not in an abnormal state. This not only saves energy, but also prevents damage to the cell assembly 120.

[0177] If an access device is detected, a communication handshake is performed with that access device; if no access device is detected, the battery pack operating condition is set to idle mode.

[0178] Please see Figure 8 The steps for detecting the device type of the device connected to the Type-C interface 122 include:

[0179] A communication handshake is performed with the access device. If the handshake is successful, the type of communication handshake is determined. If the type of communication handshake is a charging handshake, then it is a charging device; if the type of communication handshake is a discharging handshake, then it is a discharging device.

[0180] Please see Figure 7 Continuing the explanation, the steps for charging / discharging the battery pack 100, depending on the device type, include:

[0181] If the device type is a charging device, determine whether a charging request has been received from the charging device. If a charging request has been received, determine whether charging is required based on the battery pack status. If charging is required, set the battery pack operating condition to charging mode, charge the battery pack 100, and execute the charging protection logic.

[0182] If the device type is a discharge device, determine whether a discharge request has been received from the discharge device. If a discharge request has been received, determine whether discharge is possible based on the battery pack status. If it is possible, set the battery pack operating condition to discharge mode, discharge the battery pack 100, and execute the discharge protection logic.

[0183] It should be noted that when a charging request is received, the battery pack status should be checked first, and charging should only be allowed if it is normal; when a discharging request is received, the battery pack status should be checked first, and discharging should only be allowed if it is normal, thereby avoiding damage to the cell assembly 120 caused by overcharging or undervoltage, which would affect its service life.

[0184] Please see Figure 9 The steps of the charging protection logic include:

[0185] The charging voltage of the battery pack 100 is determined based on the interface signal of the Type-C interface 122;

[0186] The battery pack 100 is charged according to the charging voltage;

[0187] During the charging process, the circuit parameters are monitored for abnormalities. If abnormalities are found, the circuit voltage and circuit current are adjusted. If the abnormalities persist after adjustment, charging is stopped. The circuit parameters include circuit voltage, circuit current, power device temperature, and input / output voltage.

[0188] Charging is complete when the state of charge of the battery cell assembly 120 is greater than the preset maximum charging value.

[0189] Optionally, the charging protection logic steps may also include:

[0190] During charging, the battery pack status is monitored in real time; if the battery pack status is abnormal, charging is stopped.

[0191] Please see Figure 10 The steps of the discharge protection logic include:

[0192] The discharge voltage of the battery pack 100 is determined based on the interface signal of the Type-C interface 122; the battery pack 100 is discharged based on the discharge voltage.

[0193] During the discharge process, the circuit parameters are monitored for abnormalities. If abnormalities are found, the circuit voltage and circuit current are adjusted. If the abnormalities persist after adjustment, the discharge is stopped. The circuit parameters include circuit voltage, circuit current, power device temperature, and input / output voltage.

[0194] Discharge is complete when the state of charge of the battery cell assembly 120 is less than the preset minimum discharge value.

[0195] Optionally, the discharge protection logic steps may also include:

[0196] During the discharge process, the battery pack status is monitored in real time; if the battery pack status is abnormal, the discharge is stopped.

[0197] It should be noted that in practical applications, the parameter range can be set according to the usage needs during the charging / discharging process. When the charging or discharging parameters exceed the preset parameter range, it is considered abnormal. The charging / discharging voltage and charging / discharging current can be dynamically adjusted according to the preset logic. The number of adjustments can be once or multiple times, and the specific number can be set as needed. In this embodiment, it is 5 times.

[0198] It should be understood that the maximum charging value and the minimum discharging value are preset values, which can be determined according to the specifications of the battery pack 100. The specifications generally include capacity, voltage, charging voltage, charging current, discharging voltage, and discharging current. In this embodiment, the maximum charging value is SOC = 100%, and the minimum discharging value is SOC = 5%. In actual applications, users can set the above values ​​as needed.

[0199] Please see Figure 11 Furthermore, when the battery pack 100 also includes a power supply terminal 132, the control method includes:

[0200] Detect the device type of the device connected to the Type-C interface 122 and / or power supply terminal 132, and charge / discharge the battery pack 100 according to the device type.

[0201] Optionally, the control methods also include:

[0202] Upon receiving the activation signal, the charging and discharging control system is activated;

[0203] Check the battery pack status. If the battery pack status is normal, determine whether there is a connected device on the Type-C interface 122 and / or the power supply terminal 132.

[0204] If an access device is detected, a communication handshake is performed with that access device; if no access device is detected, the battery pack operating condition is set to idle mode.

[0205] The steps for detecting the device type connected to the power supply terminal 132 include:

[0206] A communication handshake is performed with the access device. If the handshake is successful, the type of communication handshake is determined. If the type of communication handshake is a charging handshake, then it is a charging device; if the type of communication handshake is a discharging handshake, then it is a discharging device.

[0207] Continuing the explanation, the steps for charging / discharging the battery pack 100, depending on the device type connected to the Type-C interface 122 and / or power supply terminal 132, include:

[0208] If it is a charging device, then determine whether a charging request sent by the charging device has been received. If a charging request has been received, then determine the battery pack operating condition. If the battery pack operating condition is non-discharge mode, then determine whether the battery pack 100 needs to be charged according to the battery pack status. If it needs to be charged, then charge the battery pack 100 through the Type-C interface 122 and / or the power supply terminal 132.

[0209] If it is a discharge device, then determine whether a discharge request sent by the discharge device has been received. If a discharge request has been received, then determine the battery pack operating condition. If the battery pack operating condition is non-charging mode, then determine whether it can be discharged according to the battery pack status. If it can be discharged, then discharge the battery pack 100 through the Type-C interface 122 and / or the power supply terminal 132.

[0210] As can be seen, the charging and discharging control method in the above embodiments is applied to the battery pack 100 that uses the Type-C interface 122 and / or power supply terminal 132 for charging and discharging. It supports the USB PD fast charging protocol, can detect the device type of the device connected to the Type-C interface 122 and / or power supply terminal 132 in real time, and charges and discharges the battery pack 100 according to the device type. It can not only quickly charge through the Type-C interface 122 and / or power supply terminal 132, but also quickly discharge the connected device with the Type-C interface 122 and / or power supply terminal 132. Moreover, the charging and discharging power can be adjusted within a certain range according to the connected device, which is suitable for a variety of connected devices with different voltages, making it convenient for users. During the charging and discharging process, the technical parameters of the battery pack 100 are detected in real time, and the charging and discharging protection logic is executed according to the technical parameters to dynamically adjust the input / output power, which can effectively protect the safety of the battery pack 100 and extend the service life of the battery pack 100.

[0211] Please see Figure 1 Another embodiment of the present invention discloses a battery pack 100, including a charging and discharging control system, a cell assembly 120 and at least one Type-C interface 122;

[0212] The charging and discharging control system is connected in series between the Type-C interface 122 and the battery cell assembly 120. The Type-C interface 122 is detachably connected to an access device. The charging and discharging control system charges / discharges the battery pack 100 through the Type-C interface 122 according to the device type of the access device.

[0213] It should be understood that the battery pack 100 in this embodiment may also include a power supply terminal 132 and a plurality of Type-C interfaces 122. One end of the charging and discharging control system is connected to each Type-C interface 122 and the power supply terminal 132, and the other end is connected to the cell assembly 120. Each Type-C interface 122 and / or power supply terminal 132 is detachably connected to an access device. The charging and discharging control system charges / discharges the battery pack 100 through each Type-C interface 122 and / or power supply terminal 132 according to the type of access device.

[0214] As can be seen, the battery pack 100 in this embodiment is applied to a battery pack 100 that uses a Type-C interface 122 and / or power supply terminal 132 for charging / discharging. It supports the USB PD fast charging protocol and can detect the device type of the device connected to the Type-C interface 122 and / or power supply terminal 132 in real time. Based on the device type, it charges / discharges the battery pack 100. It can not only quickly charge the battery pack through the Type-C interface 122 and / or power supply terminal 132, but also quickly discharge the battery pack 100 to the connected device with the Type-C interface 122 and / or power supply terminal 132. Moreover, the charging / discharging power can be adjusted within a certain range according to the connected device, making it suitable for various connected devices with different voltages, which is convenient for users. During the charging / discharging process, the technical parameters of the battery pack 100 are detected in real time, and the charging / discharging protection logic is executed according to the technical parameters to dynamically adjust the input / output power, which can effectively protect the safety of the battery pack 100 and extend its service life.

[0215] In summary, the charging and discharging control system, method, and battery pack of the present invention support the USB PD fast charging protocol, can detect the device type of the device connected to the Type-C interface 122 and / or power supply terminal 132 in real time, and charge / discharge the battery pack 100 according to the device type. It can not only perform fast charging through the Type-C interface 122 and / or power supply terminal 132, but also perform fast discharging for connected devices with Type-C interfaces 122 and / or power supply terminals 132. Furthermore, the charging / discharging power can be adjusted within a certain range according to the connected device, making it suitable for various connected devices with different voltages, thus facilitating user operation. During the charging / discharging process, the technical parameters of the battery pack 100 are detected in real time, and charging / discharging protection logic is executed according to these parameters to dynamically adjust the input / output power, effectively protecting the safety of the battery pack 100 and extending its service life. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0216] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A charging and discharging control system, characterized in that, Applied to battery packs that use a Type-C interface for charging / discharging; The control system is used to detect the device type of the device connected to the Type-C interface, and to charge / discharge the battery pack according to the device type; wherein, the device type includes charging devices and discharging devices; The control system includes: The detection module is used to acquire the battery parameters of the cell assembly and the circuit parameters of the Type-C circuit of the battery pack in real time. The control module is used to determine the device type of the connected device based on the interface signal of the Type-C interface; it is also used to output control signals to the voltage regulation module based on the device type, the battery parameters, and the circuit parameters. A voltage regulating module is connected in series between the battery cell assembly and the Type-C interface, and its control terminal is electrically connected to the control module, for adjusting the input / output voltage of the battery cell assembly according to the control signal of the control module; The battery parameters include the voltage, current, and temperature of the cell assembly; The loop parameters include loop voltage, loop current, power device temperature, and input / output voltage.

2. The charging and discharging control system according to claim 1, characterized in that, The control module includes: The first control unit is used to obtain the battery pack status according to the battery parameters and transmit it to the second control unit; The second control unit is used to determine the device type of the connected device based on the interface signal of the Type-C interface; it is also used to output control signals to the voltage regulation module based on the device type, the battery pack status and the circuit parameters.

3. The charging and discharging control system according to claim 2, characterized in that, The battery pack status includes: abnormal, normal, charging protection, and discharging protection; If any of the following conditions are met: the voltage of the battery cell assembly is less than a preset first threshold, greater than a preset fourth threshold, or the temperature is greater than a preset temperature threshold, then the battery pack is in an abnormal state and charging / discharging is not allowed. If the voltage of the battery cell assembly is between the preset second threshold and the third threshold, the battery pack is in normal condition and can be charged / discharged. If the voltage of the battery cell assembly is between a preset first threshold and a second threshold, the battery pack is in charging protection mode and is only used for charging. If the voltage of the battery cell assembly is between the preset third threshold and the fourth threshold, the battery pack is in discharge protection mode and is only used for discharging. The voltage values ​​of the first threshold, the second threshold, the third threshold, and the fourth threshold increase sequentially.

4. The charging and discharging control system according to claim 2, characterized in that, The detection module includes: The first detection unit is used to acquire the battery parameters in real time and transmit them to the first control unit; The second detection unit is used to acquire the loop parameters in real time and transmit them to the second control unit.

5. The charging and discharging control system according to claim 2, characterized in that, The voltage regulating module includes: The full-bridge drive unit is used to output a drive signal to the full-bridge power unit according to the control signal of the second control unit; A full-bridge power unit is connected in series between the Type-C interface and the battery cell assembly, and its control terminal is connected to the full-bridge drive unit to adjust the input / output voltage of the battery cell assembly according to the drive signal.

6. The charging and discharging control system according to claim 5, characterized in that, The control system further includes: An activation unit is used to activate the first control unit according to an activation signal; the activation signal is obtained through the connection status of the Type-C interface and / or by pressing the activation button. The first control unit is also used to detect the status of the battery pack after being activated, and if the status of the battery pack is not abnormal, then activate the second control unit. A Type-C communication unit is connected in series between the second control unit and the Type-C interface for communicating between the second control unit and the access device on the Type-C interface; The Type-C protection unit is connected in series between the full-bridge power unit and the Type-C interface, and its control terminal is connected to the second control unit for charging / discharging protection according to the protection command of the second control unit. The second control unit is also used to output protection commands to the Type-C protection unit according to the battery pack status and the circuit parameters.

7. The charging and discharging control system according to claim 2, characterized in that, The battery pack also includes a power supply terminal; the control system is further configured to detect the device type of the device connected to the power supply terminal, and charge / discharge the battery pack according to the Type-C interface and / or the device type of the device connected to the power supply terminal.

8. The charging and discharging control system according to claim 7, characterized in that, The control system further includes: The activation signal received by the activation unit can also be obtained through one or more of the connection status of the Type-C interface, the connection status of the power supply terminal, or pressing the activation button; A terminal communication unit is connected in series between the power supply terminal and the first control unit for communicating between the first control unit and the access device on the power supply terminal. A terminal protection unit is connected in series between the power supply terminal and the battery cell assembly, and its control terminal is connected to the first control unit for charging / discharging protection according to the protection command of the first control unit. The first control unit is also used to output protection commands to the terminal protection unit according to the battery parameters.

9. The charging and discharging control system according to claim 7, characterized in that: The second control unit is further configured to transmit the device type of the device connected to the Type-C interface to the first control unit; The first control unit is further configured to determine the device type of the connected device based on the interface signal of the power supply terminal; to set the battery pack operating conditions based on the connection status of the connected device and the battery pack charging / discharging status; and to charge / discharge the battery pack according to the device type and the battery pack operating conditions. The battery pack operating conditions include charging mode, discharging mode, and idle mode.

10. A method for controlling charging and discharging, characterized in that, Applied to battery packs that use a Type-C interface for charging / discharging; the control method includes: Detect the device type of the device connected to the Type-C interface; The battery pack is charged / discharged according to the device type; wherein, the device type includes charging device and discharging device; The control method further includes: Upon receiving the activation signal, the charging and discharging control system is activated; The battery pack status is detected. If the battery pack status is not abnormal, it is determined whether there is an access device on the Type-C interface. If there is, a communication handshake is performed with the access device. Otherwise, the battery pack status is set to idle mode. If the handshake is successful, determine the type of communication handshake. If the communication handshake type is a charging handshake, then it is a charging device; if the communication handshake type is a discharging handshake, then it is a discharging device. The battery pack status is obtained by judging battery parameters in real time, including the voltage, current and temperature of the cell assembly.

11. The charging and discharging control method according to claim 10, characterized in that, The step of charging / discharging the battery pack according to the device type includes: If it is a charging device, determine whether a charging request has been received from the charging device. If it is received, determine whether charging is required based on the battery pack status. If charging is required, set the battery pack operating condition to charging mode, charge the battery pack, and execute the charging protection logic. If it is a discharge device, determine whether a discharge request has been received from the discharge device. If it has, determine whether it can be discharged based on the battery pack status. If it can, set the battery pack operating condition to discharge mode, discharge the battery pack and execute the discharge protection logic.

12. The charging and discharging control method according to claim 11, characterized in that, The charging protection logic includes: The charging voltage of the battery pack is determined based on the interface signal of the Type-C interface; The battery pack is charged according to the charging voltage; During the charging process, the circuit parameters are monitored for abnormalities. If abnormalities are found, the circuit voltage and circuit current are adjusted. If the abnormalities persist after adjustment, charging is stopped. The circuit parameters include circuit voltage, circuit current, power device temperature, and input / output voltage. Charging is complete when the state of charge of the battery cell assembly exceeds the preset maximum charging value.

13. The charging and discharging control method according to claim 12, characterized in that, The charging protection logic also includes: During charging, the status of the battery pack is monitored in real time; If the battery pack is in an abnormal state, charging will stop.

14. The charging and discharging control method according to claim 11, characterized in that, The discharge protection logic includes: The discharge voltage of the battery pack is determined based on the interface signal of the Type-C interface; The battery pack is discharged according to the discharge voltage; During the discharge process, the circuit parameters are monitored for abnormalities. If abnormalities are found, the circuit voltage and circuit current are adjusted. If the abnormalities persist after adjustment, the discharge is stopped. The circuit parameters include circuit voltage, circuit current, power device temperature, and input / output voltage. Discharge is complete when the state of charge of the battery cell assembly is less than the preset minimum discharge value.

15. The charging and discharging control method according to claim 14, characterized in that, The discharge protection logic also includes: During the discharge process, the status of the battery pack is monitored in real time; If the battery pack is in an abnormal state, then the discharge will stop.

16. The charging and discharging control method according to claim 10, characterized in that, It is also applied to battery packs that use power supply terminals for charging / discharging; the control method further includes: Detect the device type of the device connected to the power supply terminal; The battery pack is charged / discharged according to the device type of the device connected to the Type-C interface and / or the power supply terminal.

17. The charging and discharging control method according to claim 16, characterized in that, The step of charging / discharging the battery pack according to the device type further includes: Upon receiving a charging request, the battery pack status is determined. If the battery pack is in non-discharge mode, the system determines whether charging is required based on the battery pack status. Upon receiving a discharge request, the battery pack status is assessed. If the battery pack is in non-charging mode, the system determines whether discharge is permissible based on the battery pack status.

18. A battery pack, characterized in that, Includes a charging and discharging control system, battery cell assembly, and at least one Type-C interface; The control system is connected in series between the Type-C interface and the battery cell assembly. An access device is detachably connected to the Type-C interface. The control system charges / discharges the battery pack according to the device type of the access device. The control system includes: The detection module is used to acquire the battery parameters of the cell assembly and the circuit parameters of the Type-C circuit of the battery pack in real time. The control module is used to determine the device type of the connected device based on the interface signal of the Type-C interface; it is also used to output control signals to the voltage regulation module based on the device type, the battery parameters, and the circuit parameters. A voltage regulating module is connected in series between the battery cell assembly and the Type-C interface, and its control terminal is electrically connected to the control module, for adjusting the input / output voltage of the battery cell assembly according to the control signal of the control module; The battery parameters include the voltage, current, and temperature of the cell assembly; The loop parameters include loop voltage, loop current, power device temperature, and input / output voltage.

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