A heating power bank control circuit

Abstract

This utility model discloses a control circuit for a heated power bank, relating to the field of mobile power supply technology. The circuit includes a charging / discharging module, a voltage regulator module, a CPU control module, and a heating control module. The voltage regulator module, CPU control module, and heating control module are all connected to the charging / discharging module, and both are connected to the CPU control module. The charging / discharging module, controlled by the CPU control module, charges and discharges the lithium battery. The voltage regulator module, also controlled by the CPU control module, provides a stable voltage to the lithium battery. The heating control module, controlled by the CPU control module, manages the temperature of the heated power bank. This utility model uses the CPU control module to control the charging / discharging module to charge and discharge the lithium battery, and monitors the ambient temperature and lithium battery temperature inside the heated power bank in real time. Based on user needs or actual requirements, it controls the heating module to heat the power bank, meeting the user's heating needs and ensuring the heated power bank operates in a safe environment.

Description

Technical Field

[0001] This utility model relates to the field of mobile power technology, and in particular to a control circuit for a heated power bank. Background Technology

[0002] With the continuous upgrading of mobile terminal products, the battery life has been put to an unprecedented test. In the absence of a fixed power source, in order to ensure the battery life of mobile terminal products, power banks have been introduced to ensure that mobile terminal products can be charged in time when you are out and about.

[0003] Most existing power bank products use standard USB charging and discharging interfaces to charge and discharge their built-in batteries. These interfaces have low power output, which can easily reduce the power bank's charging and discharging efficiency and damage the built-in battery. Furthermore, the battery capacity is relatively small, failing to adequately meet user needs. Moreover, as living standards improve, people have higher demands for power banks, requiring them to have diverse functions, such as heating capabilities to meet users' needs for warmth. However, power banks with small battery capacities cannot effectively accommodate heating functions.

[0004] In the process of developing this utility model, the applicant discovered at least the following problems in the prior art:

[0005] Existing power banks have poor performance, which can negatively impact the user experience. Utility Model Content

[0006] The purpose of this invention is to provide a control circuit for a heated power bank, thereby solving the technical problem that existing power banks have poor performance and easily affect the user experience. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This utility model provides a heating power bank control circuit, including a charging / discharging module, a voltage regulator module, a CPU control module, and a heating control module. The voltage regulator module, CPU control module, and heating control module are all connected to the charging / discharging module, and both are connected to the CPU control module. The charging / discharging module, controlled by the CPU control module, charges and discharges the lithium battery. The voltage regulator module, controlled by the CPU control module, provides a stable voltage to the lithium battery. The heating control module, controlled by the CPU control module, manages the temperature of the heating power bank.

[0009] Optionally, the charging / discharging module includes a charging / discharging interface J1, a power switch Q9, a battery connection part, and a main control chip U1. The charging / discharging interface J1 is connected to the main control chip U1 through the VBUS pin, CSN_VBUS pin, and CSP_VBUS pin. The first end of the power switch Q9 is connected to the charging / discharging interface J1 through the A4B9 pin and B4A9 pin, and the second end of the power switch Q9 is connected to the main control chip U1 through the VBUS pin, CSN_VBUS pin, and CSP_VBUS pin. The power switch Q9 is used to control the on / off state of the charging / discharging module current. The battery connection part is connected to the main control chip U1 through the CSP_VBAT pin, CSN_VBAT pin, and BAT+ pin. The battery connection part is used to connect the lithium battery.

[0010] Optionally, the charging / discharging interface J1 is of model TYPE-C16PIN, and the main control chip U1 is of model SW6301.

[0011] Optionally, the charging and discharging module further includes an H-bridge module, resistor R18, and resistor R19. The H-bridge module is connected to the main control chip U1 through the SW1, HD1, BST1, LD1, LD2, BST2, HD2, and SW2 pins of the main control chip U1. The H-bridge module is used to control the charging and discharging direction of the lithium battery.

[0012] The first end of resistor R18 is connected to the CSP_VBUS pin of the main control chip U1 and the second end of the power switch Q9. The second end of resistor R18 is connected to the CSN_VBUS pin of the main control chip U1 and the first end of the H-bridge module. The first end of resistor R19 is connected to the second end of the H-bridge module and the CSP_VBAT pin of the main control chip U1. The second end of resistor R19 is connected to the CSN_VBAT pin of the main control chip U1 and the battery connection portion. Both resistors R18 and R19 are used to monitor the charging and discharging current of the charging and discharging module.

[0013] Optionally, the charging and discharging module further includes a switch KEY1 and a temperature sensor NTC1. The switch KEY1 is connected to the main control chip U1 through the KEY / KMOD pin of the main control chip U1, and the switch KEY1 is used to control the state of the heated power bank. The temperature sensor NTC1 is connected to the main control chip U1 through the NTC pin of the main control chip U1, and the temperature sensor NTC1 is used to monitor the temperature of the lithium battery.

[0014] Optionally, the CPU control module is connected to the main control chip U1 via the SCK pin, SDA pin, IRQ pin, and BAT+ pin of the main control chip U1.

[0015] Optionally, the heating control module is connected to the main control chip U1 via the PACK+ pin of the main control chip U1.

[0016] Optionally, the voltage regulator module integrates a temperature sensor NTC2, which is used to monitor the ambient temperature inside the heated power bank.

[0017] Optionally, the control circuit further includes a battery protection module, which is connected to the main control chip U1 via the BAT+ pin, PACK+ pin, and B+ pin.

[0018] Optionally, the battery protection module includes a lithium battery protection chip U4, a transient voltage suppressor TVS1, a fuse F1, and a temperature sensor NTC3. The first terminal of the temperature sensor NTC3 is connected to the BAT- pin of the battery protection module, and the second terminal of the temperature sensor NTC3 is connected to the CHR pin, DHR pin, and CLR pin of the lithium battery protection chip U4. The first terminal of the transient voltage suppressor TVS1 is connected to the PACK+ pin of the battery protection module and the first terminal of the fuse F1, the second terminal of the transient voltage suppressor TVS1 is connected to the PACK- pin of the battery protection module, and the second terminal of the fuse F1 is connected to the BAT+ pin of the battery protection module.

[0019] Implementing one of the above-described technical solutions of this utility model has the following advantages or beneficial effects:

[0020] This invention uses a CPU control module to control the charging and discharging module to charge and discharge the lithium battery, and monitors the ambient temperature and lithium battery temperature inside the heated power bank in real time. It controls the heating control module to heat the battery according to user needs or actual requirements, thereby meeting the user's heating needs and ensuring that the heated power bank is in a safe working environment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1This is a circuit diagram of the charging and discharging module according to an embodiment of the present invention;

[0023] Figure 2 This is a circuit diagram of the CPU control module according to an embodiment of the present invention;

[0024] Figure 3 This is a circuit diagram of the heating control module according to an embodiment of the present invention;

[0025] Figure 4 This is a circuit diagram of the voltage regulator module according to an embodiment of the present invention;

[0026] Figure 5 This is a circuit diagram of the battery protection module according to an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be adopted to implement this utility model. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of this utility model disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] To illustrate the technical solution described in this utility model, specific embodiments are described below, showing only the parts related to the embodiments of this utility model.

[0030] Example 1:

[0031] like Figure 1 As shown, this utility model provides a control circuit for a heated power bank, including a charging / discharging module, a voltage regulator module, a CPU control module, and a heating control module. The voltage regulator module, CPU control module, and heating control module are all connected to the charging / discharging module, and both are connected to the CPU control module. The charging / discharging module, controlled by the CPU control module, charges and discharges the lithium battery. The voltage regulator module, controlled by the CPU control module, provides a stable voltage to the lithium battery. The heating control module, controlled by the CPU control module, manages the temperature of the heated power bank. Specifically, the charging / discharging module can charge the lithium battery, enabling energy storage for use as a portable power source, and can also be used to charge electronic devices, extending their battery life. The CPU control module communicates with the charging / discharging module via I2C to monitor the lithium battery status. The lithium battery can be selected as a 4-cell lithium battery pack. The voltage regulator module provides a 5V regulated output to power the CPU control module and peripheral circuits, ensuring the stability of the control circuit. The heating control module can heat the lithium battery in low-temperature environments to maintain the performance of the heated power bank, and can also adjust the heating temperature, enabling the power bank to have a heating function.

[0032] This invention uses a CPU control module to control the charging and discharging module to charge and discharge the lithium battery, and monitors the ambient temperature and lithium battery temperature inside the heated power bank in real time. It controls the heating control module to heat the battery according to user needs or actual requirements, thereby meeting the user's heating needs and ensuring that the heated power bank is in a safe working environment.

[0033] As an optional implementation method, such as Figure 1As shown, the charging / discharging module includes a charging / discharging interface J1, a power switch Q9, a battery connection part, and a main control chip U1. The charging / discharging interface J1 is connected to the main control chip U1 through its VBUS, CSN_VBUS, and CSP_VBUS pins. The first terminal of the power switch Q9 is connected to the charging / discharging interface J1 through its A4B9 and B4A9 pins, and the second terminal of the power switch Q9 is connected to the main control chip U1 through its VBUS, CSN_VBUS, and CSP_VBUS pins. The power switch Q9 is used to control the on / off state of the charging / discharging module current. The battery connection part is connected to the main control chip U1 through its CSP_VBAT, CSN_VBAT, and BAT+ pins, and is used to connect a lithium battery. Specifically, the power input pin of the charging / discharging interface J1 is connected to the VBUS, CSN_VBUS, and CSP_VBUS pins of the main control chip U1. The heated power bank can be connected to an external power source or device (such as a mobile phone) through the charging / discharging interface J1 to charge the power bank for energy storage, and also to discharge and charge the device. The charging / discharging interface J1 is a TYPE-C16PIN and supports the USB PD protocol. The main control chip U1 is an SW6301. A power switch Q9 is connected between the charging / discharging interface J1 and the main control chip U1. Power switch Q9 controls the current path during charging and discharging; it can be an NMOS transistor. The battery connection section connects to the lithium battery through the BAT+ pin, and the main control chip U1 controls the charging and discharging of the lithium battery through this connection section.

[0034] As an optional implementation method, such as Figure 1As shown, the charging / discharging module also includes an H-bridge module, resistors R18 and R19. The H-bridge module is connected to the main control chip U1 via pins SW1, HD1, BST1, LD1, LD2, BST2, HD2, and SW2. The H-bridge module is used to control the charging / discharging direction of the lithium battery. The first end of resistor R18 is connected to the CSP_VBUS pin of the main control chip U1 and the second end of the power switch Q9. The second end of resistor R18 is connected to the CSN_VBUS pin of the main control chip U1 and the first end of the H-bridge module. The first end of resistor R19 is connected to the second end of the H-bridge module and the CSP_VBAT pin of the main control chip U1. The second end of resistor R19 is connected to the CSN_VBAT pin of the main control chip U1 and the battery connection. Both resistors R18 and R19 are used to monitor the charging / discharging current of the charging / discharging module. Specifically, the H-bridge module includes NMOS transistors Q5, Q6, Q7, and Q8. These transistors work together to control the conduction state of the H-bridge module, thereby controlling the charging and discharging direction and preventing reverse connection or short circuit of the power bank. The model of NMOS transistors Q5, Q6, Q7, and Q8 can be NCEP40T11G. The H-bridge module also includes inductor L1 for the DC-DC boost topology. Resistors R18 and R19 sample the current of the power bank during charging and discharging and transmit the collected current data to the main control chip U1. The main control chip U1 performs protection judgment. When the voltage drop across resistors R18 and R19 exceeds the threshold (i.e., overcurrent occurs), the main control chip U1 controls the H-bridge module to disconnect, cutting off the charging and discharging path.

[0035] As an optional implementation method, such as Figure 1 As shown, the charging and discharging module also includes a switch KEY1 and a temperature sensor NTC1. Switch KEY1 is connected to the main control chip U1 via the KEY / KMOD pin and is used to control the state of the heated power bank. Temperature sensor NTC1 is connected to the main control chip U1 via the NTC pin and is used to monitor the temperature of the lithium battery. Specifically, the user can adjust the state of the heated power bank by pressing switch KEY1, such as off, on (allowing for discharging), or heating. Temperature sensor NTC1 monitors the temperature of the lithium battery; its resistance changes with temperature. NTC1 transmits the monitored lithium battery temperature information to the main control chip U1, which determines whether the lithium battery is overheating. When the lithium battery overheats, the main control chip U1 triggers overheat protection to ensure the lithium battery operates within a safe temperature range.

[0036] As an optional implementation method, such as Figure 2 and Figure 3 As shown, the CPU control module is connected to the main control chip U1 via its SCK, SDA, IRQ, and BAT+ pins. The heating control module is connected to the main control chip U1 via its PACK+ pin. Specifically, when the CPU control module receives a heating control signal from the switch KEY1 on the charging / discharging module, it transmits a heating control signal to the heating control module. This causes the heating control module to control the heating element HEAT to heat the power bank. The heating control module uses the energy stored in the lithium battery to heat the power bank. The power bank has three selectable heating levels, which can be adjusted by the user as needed. The CPU control module includes a microcontroller U2 and a debugging interface J3. The microcontroller U2 is an APT32F1023. The microcontroller U2 controls the LEDs, which display the amount of electricity stored in the power bank and its operating status.

[0037] As an optional implementation method, such as Figure 4 As shown, the voltage regulator module integrates a temperature sensor NTC2, which monitors the ambient temperature inside the heated power bank. Specifically, when the temperature sensor NTC2 detects the ambient temperature of the heated power bank, it transmits the detected ambient temperature data to the microcontroller U2. The microcontroller U2 then controls the heating element HEAT to heat the battery, thus extending its battery life in low-temperature environments.

[0038] As an optional implementation method, such as Figure 5 As shown, the control circuit also includes a battery protection module, which is connected to the main control chip U1 via its BAT+, PACK+, and B+ pins. Specifically, the battery protection module connects to the lithium battery via its PACK+ and PACK- pins, and can balance the charging and discharging of the four lithium batteries in series to ensure consistent voltage across individual cells.

[0039] As an optional implementation method, such as Figure 5As shown, the battery protection module includes a lithium battery protection chip U4, a transient voltage suppressor TVS1, a fuse F1, and a temperature sensor NTC3. The first terminal of the temperature sensor NTC3 is connected to the BAT- pin of the battery protection module, and the second terminal of the temperature sensor NTC3 is connected to the CHR, DHR, and CLR pins of the lithium battery protection chip U4. The first terminal of the transient voltage suppressor TVS1 is connected to the PACK+ pin of the battery protection module and the first terminal of the fuse F1. The second terminal of the transient voltage suppressor TVS1 is connected to the PACK- pin of the battery protection module, and the second terminal of the fuse F1 is connected to the BAT+ pin of the battery protection module. Specifically, the transient voltage suppressor TVS1 is used for transient voltage suppression, protecting the current from voltage spikes and preventing overcharging, over-discharging, or overcurrent of the power bank. In low-temperature environments, the temperature of the lithium battery is detected by the NTC3 temperature sensor, which activates the heating element HEAT. The CPU control module then controls the heating power of the HEAT connected to the microcontroller U2 to prevent overheating and ensure extended battery life and performance degradation in low-temperature conditions. Fuse F1 provides overcurrent protection to ensure circuit safety.

[0040] The control circuit operates as follows during the charging process: An external power source is connected via the charging / discharging interface J1. The main control chip U1 detects the input voltage and current and adjusts the charging parameters based on the lithium battery's temperature. The current undergoes buck-boost conversion via the H-bridge module and then flows into the lithium battery through the BAT+ and BAT- pins, thus charging the lithium battery. During charging, temperature sensors NTC1, NTC2, and NTC3 monitor the battery temperature in real time. If the temperature is abnormal, charging is stopped.

[0041] The working principle of the control circuit during the discharge process: The user connects to the electrical equipment through the charging and discharging interface J1. The electrical energy stored in the lithium battery is converted into a suitable output voltage (such as 5V) by the H-bridge module through boost or buck, and then transmitted to the electrical equipment through the charging and discharging interface J1.

[0042] The embodiment is merely a special case and does not indicate that this utility model is implemented in such a way.

[0043] The above description is merely a preferred embodiment of the present utility model. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present utility model. Furthermore, under the teachings of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present utility model.

Claims

1. A control circuit for a heated power bank, characterized in that, The device includes a charging / discharging module, a voltage regulator module, a CPU control module, and a heating control module. The voltage regulator module, CPU control module, and heating control module are all connected to the charging / discharging module, and both are connected to the CPU control module. The charging / discharging module, controlled by the CPU control module, charges and discharges the lithium battery. The voltage regulator module, controlled by the CPU control module, provides a stable voltage to the lithium battery. The heating control module, controlled by the CPU control module, manages the temperature of the heated power bank.

2. The heating power bank control circuit according to claim 1, characterized in that, The charging / discharging module includes a charging / discharging interface J1, a power switch Q9, a battery connection part, and a main control chip U1. The charging / discharging interface J1 is connected to the main control chip U1 through its VBUS, CSN_VBUS, and CSP_VBUS pins. The first end of the power switch Q9 is connected to the charging / discharging interface J1 through its A4B9 and B4A9 pins, and the second end of the power switch Q9 is connected to the main control chip U1 through its VBUS, CSN_VBUS, and CSP_VBUS pins. The power switch Q9 is used to control the on / off state of the charging / discharging module current. The battery connection part is connected to the main control chip U1 through its CSP_VBAT, CSN_VBAT, and BAT+ pins, and is used to connect to the lithium battery.

3. The heating power bank control circuit according to claim 2, characterized in that, The charging / discharging interface J1 is model TYPE-C16PIN, and the main control chip U1 is model SW6301.

4. The heating power bank control circuit according to claim 2, characterized in that, The charging and discharging module also includes an H-bridge module, resistor R18 and resistor R19. The H-bridge module is connected to the main control chip U1 through the SW1, HD1, BST1, LD1, LD2, BST2, HD2 and SW2 pins of the main control chip U1. The H-bridge module is used to control the charging and discharging direction of the lithium battery. The first end of resistor R18 is connected to the CSP_VBUS pin of the main control chip U1 and the second end of the power switch Q9. The second end of resistor R18 is connected to the CSN_VBUS pin of the main control chip U1 and the first end of the H-bridge module. The first end of resistor R19 is connected to the second end of the H-bridge module and the CSP_VBAT pin of the main control chip U1. The second end of resistor R19 is connected to the CSN_VBAT pin of the main control chip U1 and the battery connection portion. Both resistors R18 and R19 are used to monitor the charging and discharging current of the charging and discharging module.

5. The heating power bank control circuit according to claim 4, characterized in that, The charging and discharging module also includes a switch KEY1 and a temperature sensor NTC1. The switch KEY1 is connected to the main control chip U1 through the KEY / KMOD pin of the main control chip U1, and the switch KEY1 is used to control the state of the heating power bank. The temperature sensor NTC1 is connected to the main control chip U1 through the NTC pin of the main control chip U1, and the temperature sensor NTC1 is used to monitor the temperature of the lithium battery.

6. The heating power bank control circuit according to claim 2, characterized in that, The CPU control module is connected to the main control chip U1 through the SCK pin, SDA pin, IRQ pin and BAT+ pin.

7. The heating power bank control circuit according to claim 2, characterized in that, The heating control module is connected to the main control chip U1 via the PACK+ pin.

8. The heating power bank control circuit according to claim 1, characterized in that, The voltage regulator module integrates a temperature sensor NTC2, which is used to monitor the ambient temperature inside the heated power bank.

9. The heating power bank control circuit according to claim 2, characterized in that, The control circuit also includes a battery protection module, which is connected to the main control chip U1 through the BAT+ pin, PACK+ pin and B+ pin.

10. The heating power bank control circuit according to claim 9, characterized in that, The battery protection module includes a lithium battery protection chip U4, a transient voltage suppressor TVS1, a fuse F1, and a temperature sensor NTC3. The first terminal of the temperature sensor NTC3 is connected to the BAT- pin of the battery protection module, and the second terminal of the temperature sensor NTC3 is connected to the CHR pin, DHR pin, and CLR pin of the lithium battery protection chip U4. The first terminal of the transient voltage suppressor TVS1 is connected to the PACK+ pin of the battery protection module and the first terminal of the fuse F1, the second terminal of the transient voltage suppressor TVS1 is connected to the PACK- pin of the battery protection module, and the second terminal of the fuse F1 is connected to the BAT+ pin of the battery protection module.

Images