Charging device and electronic equipment

Abstract

The utility model provides a charging device and an electronic device, the charging device comprises a master control module, a temperature data conversion module, a protection module, a switch module, a power conversion module and a charging input connector, the protection module comprises a first temperature sensitive resistor with a negative temperature coefficient, the first temperature sensitive resistor is attached and fixed on the charging input connector, and the first temperature sensitive resistor is connected with the switch module. When the temperature of the charging input connector is abnormal, the voltage change condition of the collecting end of the first temperature-sensitive resistor can be sensed by the temperature data conversion module, abnormal temperature information is transmitted to the main control module, the main control module responds to the abnormal temperature information and can control the switch module to be switched off, power supply of the power conversion module is cut off, and charging is stopped. And disconnecting the charging current in the line. The charging device and the electronic equipment provided by the utility model can quickly and effectively respond to the temperature abnormity of the charging input connector, quickly and effectively disconnect the charging loop, reduce the abnormal overheating risk of the charging input connector, and improve the power utilization safety of the electronic equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electronic equipment electricity safety, especially relates to a charging device and electronic equipment. BACKGROUND

[0002] In order to reduce charging waiting time, improve practical experience, at present, various fast charging protocols are released, and the corresponding supporting sockets (such as USB-C, USB-A) are widely used in various mobile power supplies and electronic products with energy storage.

[0003] Among them, under different application requirements, the actual charging power is adaptively adjusted according to specific requirements, when faster charging speed is required, the corresponding charging current must be increased, whether male or female socket is due to long-term plug-in or due to manufacturing process, the terminal may have a problem of poor contact, internal polarity non-complete short circuit during charging and discharging, at this time, under the working requirement of increasing charging current, the abnormal heat quantity will also increase synchronously, which may cause functional abnormality, or even cause serious safety accidents such as melting of the shell and fire.

[0004] However, in the prior art, the related temperature protection circuit mainly protects the temperature of the control chip and the power supply, and the response capability of the male and female sockets is insufficient, and the safety is insufficient. INVENTION CONTENTS

[0005] Therefore, the utility model aims at providing a charging device and electronic equipment to solve the problem of insufficient response capability of male and female sockets in the prior art and insufficient safety.

[0006] The utility model provides a charging device, including main control module, temperature data conversion module, protection module, switch module, power conversion module, charging input joint, wherein,

[0007] The protection module includes a first temperature-sensitive resistor with a negative temperature coefficient, and a first drive circuit connected with the first temperature-sensitive resistor, and the first temperature-sensitive resistor is fixed on the charging input joint;

[0008] The charging input joint is connected to the input end of the power conversion module through the switch module, and the output end of the power conversion module is a charging output end;

[0009] The temperature data conversion module includes a first temperature signal input end and a temperature data output end, the first temperature signal input end is connected to the acquisition end of the first temperature-sensitive resistor, the temperature data output end is connected to the temperature data input end of the main control module, and the temperature data conversion module includes a single-chip microcomputer chip;

[0010] The master control module further comprises a switch control signal output end and a charging power control signal output end, the switch control signal output end is connected to the control end of the switch module, the charging power control signal output end is connected to the control end of the power conversion module, and the master control module comprises a power supply chip capable of regulating the output power of the power conversion module.

[0011] Optionally, a second temperature-sensitive resistor with a positive temperature coefficient is further included, the second temperature-sensitive resistor is fixedly attached to the charging input terminal and is connected in series between the charging input terminal and the switch module.

[0012] Optionally, the first drive circuit comprises a first switch, an input end of the first switch is connected to a working power supply, an output end of the first switch is connected to a collection end of the first temperature-sensitive resistor through a first resistor, the input end and the control end of the first switch are connected through a second resistor, the control end of the first switch is connected to a protection enable control signal output end of the temperature data conversion module through a third resistor, the other end of the first temperature-sensitive resistor is grounded, and the first temperature-sensitive resistor is connected in parallel with a first capacitor.

[0013] Optionally, the switch module comprises a second switch and a third switch, the second switch and the third switch are connected in series between the input end and the output end of the switch module in sequence, the control ends of the second switch and the third switch are connected to the switch control signal output end through a fourth resistor, and the control ends of the second switch and the third switch are further connected to a middle node of the second switch and the third switch through a fifth resistor.

[0014] Optionally, the power conversion module comprises an input half-bridge and an output half-bridge connected to the input end and the output end of the power conversion module respectively, the input half-bridge and the output half-bridge are connected through an inductor, and the control ends of the input half-bridge and the output half-bridge are connected to the charging power regulation signal output end of the master control module.

[0015] Optionally, a power supply module and a power supply module are further included, wherein,

[0016] The power supply module comprises a storage battery, and a positive end of the storage battery is connected to the output end of the power conversion module.

[0017] The power supply module comprises a low-dropout linear regulator, an input end of the low-dropout linear regulator is connected to a power supply bus of the charging input terminal and a positive end of the storage battery through a first diode and a second diode respectively, and an output end of the low-dropout linear regulator is connected to the power supply ends of the master control module and the temperature data conversion module.

[0018] Optionally, the at least two storage batteries are connected in series, and an intermediate node of one of the at least two storage batteries is connected to a switch driving voltage signal input end of the temperature data conversion module.

[0019] Optionally, the charging device further comprises an indicator light module, the indicator light module comprising a first driving end, a second driving end and a third driving end, and a first light emitting diode, a second light emitting diode, a third light emitting diode and a fourth light emitting diode, wherein the cathode and the anode of the first light emitting diode are connected to the first driving end and the second driving end respectively, the second light emitting diode is connected in anti-parallel with the first light emitting diode, the cathode and the anode of the third light emitting diode are connected to the first driving end and the third driving end respectively, the fourth light emitting diode is connected in anti-parallel with the third light emitting diode, and the first driving end, the second driving end and the third driving end are respectively connected to corresponding indicator light driving ends of the master control module and the temperature data conversion module through two resistors respectively.

[0020] The utility model also provides an electronic equipment which comprises the charging device.

[0021] The charging device provided by the utility model comprises a master control module, a temperature data conversion module, a protection module, a switch module, a power conversion module and a charging input connector, wherein the protection module comprises a first temperature-sensitive resistor with a negative temperature coefficient, the first temperature-sensitive resistor is fixedly attached to the charging input connector, when the temperature of the charging input connector is abnormal, the voltage change of the collection end of the first temperature-sensitive resistor can be sensed by the temperature data conversion module, and the temperature information of the abnormality is transmitted to the master control module, the master control module can control the switch module to be disconnected in response to the temperature information of the abnormality, thereby cutting off the power supply of the power conversion module, stopping charging and cutting off the charging current in the circuit. The charging device provided by the utility model can quickly and effectively respond to the temperature abnormality of the charging input connector, quickly and effectively disconnect the charging circuit, reduce the risk of abnormal overheating of the charging input connector and improve the power safety of the electronic equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a main module structure diagram of the charging device in the embodiments of the utility model;

[0023] Figure 2 FIG. 2 is a circuit structure diagram of the master control module and the power conversion module of the charging device in the embodiments of the utility model;

[0024] Figure 3 FIG. 3 is a circuit structure diagram of the protection module of the charging device in the embodiments of the utility model;

[0025] Figure 4The circuit structure schematic view of the temperature data conversion module of the charging device in the embodiment of the utility model;

[0026] Figure 5 The circuit structure schematic view of the switch module of the charging device in the embodiment of the utility model;

[0027] Figure 6 The circuit structure schematic view of the power module of the charging device in the embodiment of the utility model;

[0028] Figure 7 The circuit structure schematic view of the power supply module of the charging device in the embodiment of the utility model;

[0029] Figure 8 The circuit structure schematic view of the indicating lamp module of the charging device in the embodiment of the utility model;

[0030] Figure 9 The installation position schematic view of the temperature sensitive resistor of the charging device in the embodiment of the utility model.

[0031] The following specific embodiments will further illustrate the utility model in connection with the above-mentioned drawings. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the related drawings. The drawings show several embodiments of the utility model. However, the utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] In order to solve the problem of insufficient response ability and safety for the temperature abnormality of the male and female seats of the connector in the prior art, the utility model provides a charging device, including host module, temperature data conversion module, protection module, switch module, power conversion module, charging input connector, wherein, the protection module includes the first temperature sensitive resistor of negative temperature coefficient, the first temperature sensitive resistor is fixedly attached on the charging input connector, when the temperature of the charging input connector is abnormal, the voltage change of the collection end of the first temperature sensitive resistor can be perceived by the temperature data conversion module, and the abnormal temperature information is transmitted to the host module, the host module can control the switch module to be disconnected in response to the abnormal temperature information, and then the power supply of the power conversion module is disconnected, the charging is stopped, the charging current in the circuit is disconnected, the risk of abnormal overheating of the charging input connector is reduced, and the power safety of the electronic equipment is improved.

[0036] Specifically, please refer to Figures 1 to 9 The charging device mainly includes a host module 10, a temperature data conversion module 20, a protection module 30, a switch module 40, a power conversion module 50 and a charging input connector 101, wherein the protection module 30 includes a first temperature sensitive resistor RT1 with a negative temperature coefficient and a first drive circuit connected with the first temperature sensitive resistor RT1, the first temperature sensitive resistor RT1 is fixedly attached on the charging input connector 101, and the resistance value of the first temperature sensitive resistor RT1 changes synchronously with the temperature change of the charging input connector 101, under the drive of the first drive circuit, the voltage of the collection end of the first temperature sensitive resistor RT1 changes accordingly, and a first temperature signal NTC2_TYPEC can be provided to the first temperature signal input end of the temperature data conversion module 20, the temperature data conversion module 20 processes and obtains temperature data according to the first temperature signal NTC2_TYPEC and a preset mapping relationship (obtained according to the specific configuration of the protection module 30), and provides the temperature data to the host module 10 through the temperature data output end, and the host module 10 compares the temperature data with a preset temperature threshold, and controls the switch module 40 to disconnect the charging circuit when the temperature data exceeds the temperature threshold.

[0037] The charging input connector 101 is connected to the input end of the power conversion module 50 through the switch module 40, the output end of the power conversion module 50 is a charging output end, after the switch module 40 is disconnected, the power conversion module 50 stops working, the current on the power supply bus VBUSC2 connected with the charging input connector 101 is greatly reduced, and the electrothermal effect is reduced, so that the risk of overheating of the charging input connector 101 can be effectively reduced.

[0038] The temperature data conversion module 20 is mainly realized by a single-chip microcomputer chip U5, wherein the program burned according to the actual design parameters of the protection module 30 is determined, and the data wiring of the program burned can be integrated in the charging input connector 101. The single-chip microcomputer chip U5 can be selected as a PY32F002B type chip for example.

[0039] The main control module 10 further includes a switch control signal output end and a charging power control signal output end, the switch control signal output end is connected to the control end of the switch module 40, and the switch module 40 is controlled to be turned on and turned off based on the switch control signal GATEC2; the charging power control signal output end is connected to the control end of the power conversion module 50, and in the embodiment, as shown in the figure, Figure 2 the main control module 10 is mainly realized by a power supply chip U3, and the output power of the power conversion module 50 can be regulated.

[0040] In the embodiment, as shown in the figure, Figure 2 the power conversion module 50 includes an input half-bridge and an output half-bridge connected to the input end and the output end of the power conversion module 50 respectively, the input half-bridge and the output half-bridge are connected through an inductor, and the control ends of the input half-bridge and the output half-bridge are connected to the charging power regulation signal output end of the main control module 10; the power supply chip U3 can adjust the output power of the input electric energy transmitted from the input half-bridge to the output half-bridge by adjusting the switch duty cycle of the input half-bridge and the output half-bridge, so as to regulate the charging power. The power supply chip U3 can be selected as a SW6306 type power supply chip for example, which can meet the technical requirements.

[0041] In order to further improve the electric heating protection capability, in the embodiment, as shown in the figure, Figure 3 the protection module 30 further includes a second temperature-sensitive resistor RT2 of positive temperature coefficient, the second temperature-sensitive resistor RT2 is fixed on the charging input connector 101 and is connected in series between the charging input connector 101 and the switch module 40; as the temperature rises, the resistance of the second temperature-sensitive resistor RT2 rises, which can reduce the current on the power supply bus, and then reduce the electric heating power, thereby reducing the risk of overheating of the charging input connector 101.

[0042] When the temperature is lower than the temperature threshold, the charging current is limited by the second temperature-sensitive resistor RT2, and when the temperature is higher than the temperature threshold, the charging circuit is disconnected by the first temperature-sensitive resistor RT1, so as to realize comprehensive temperature protection and effectively reduce the risk of overheating of the charging input connector 101.

[0043] In the embodiment, as shown in the figure, Figure 9As shown, the charging input terminal 101 is generally fixedly installed on the circuit substrate 100, and the first temperature-sensitive resistor RT1 and the second temperature-sensitive resistor RT2 can be attached to the charging input terminal 101, specifically, can be arranged above and on the side of the charging input terminal 101, and specifically, the first temperature-sensitive resistor RT1 and the second temperature-sensitive resistor RT2 can be spaced apart from the charging input terminal 101 by a distance of 0-2 mm. In an alternative embodiment, the first temperature-sensitive resistor RT1 is arranged on the lower surface of the circuit substrate 100, and the projection of the circuit substrate 100 on the circuit substrate 100 is located in the mounting area of the charging input terminal 101, so as to ensure the temperature response capability of the charging input terminal 101.

[0044] The first driving circuit includes a first switch Q1, an input end of the first switch Q1 is connected to the working power supply VDD, an output end of the first switch Q1 is connected to the collection end of the first temperature-sensitive resistor RT1 through a first resistor R1, the input end and the control end of the first switch Q1 are connected through a second resistor R2, the control end of the first switch Q1 is connected to the protection enable control signal output end of the temperature data conversion module 20 through a third resistor R3, and the first switch Q1 is controlled to be turned on and turned off according to the protection enable control signal GATE2. When the first switch Q1 is turned on, the first temperature-sensitive resistor RT1 can be connected to the working power supply VDD, and when the temperature of the charging input terminal 101 rises, the resistance of the first temperature-sensitive resistor RT1 decreases, and the voltage of the collection end decreases accordingly. In an alternative embodiment, the positions of the first temperature-sensitive resistor RT1 and the first resistor R1 are exchanged, and the collection end is the intermediate node of the first temperature-sensitive resistor RT1 and the first resistor R1. At this time, as the temperature of the charging input terminal 101 rises, the voltage of the collection end rises. The actual first temperature signal collection mode can be flexibly selected, and the processing program in the single-chip microcomputer chip U5 is adaptively adjusted, so that effective temperature protection can be achieved.

[0045] The other end of the first temperature-sensitive resistor RT1 is grounded, and the first temperature-sensitive resistor RT1 is connected in parallel with the first capacitor C1, so as to improve the stability of the voltage of the collection end of the first temperature-sensitive resistor RT1, avoid the interference of interference pulses on temperature collection, and ensure the reliability of the over-temperature protection.

[0046] In order to improve the safety of switch control, in the embodiment, as shown in FIG. 2, the first temperature-sensitive resistor RT1 is connected to the first switch Q1 through the first resistor R1, and the second temperature-sensitive resistor RT2 is connected to the second switch Q2 through the second resistor R2. Figure 5As shown, the switch module 40 includes the second switch Q2 and the third switch Q3, which are connected in series between the input end and the output end of the switch module 40, and the control ends of the second switch Q2 and the third switch Q3 are connected to the switch control signal output end of the master control module 10 through the fourth resistor R4, and the control ends of the second switch Q2 and the third switch Q3 are also connected to the middle node of the second switch Q2 and the third switch Q3 through the fifth resistor R5. Under normal circumstances, the master control module 10 drives the second switch Q2 and the third switch Q3 to be open, and the voltage on the power supply bus VBUSC2 can act on the control ends of the second switch Q2 and the third switch Q3 through the fifth resistor, so as to maintain the open state.

[0047] In the embodiment, the first switch Q1, the second switch Q2 and the third switch Q3 can be selected as insulated gate bipolar transistors, which have strong current load capacity and can be applied to large current working requirements in the fast charging protocol. Alternatively, each switch can also be a triode, a metal oxide semiconductor transistor, a silicon controlled rectifier, a relay, etc.

[0048] In order to meet the working power of each module, the power supply module 60 and the power supply module 70 are further included in the embodiment, wherein the power supply module 60 includes a battery, and the positive end of the battery is connected to the output end of the power conversion module 50, so as to obtain power supplement from the power conversion module 50. When the charging device in the embodiment is applied to an electronic product, the battery can be the main power supply of the electronic product.

[0049] As shown in the figure, Figure 7 The power supply module 70 includes a low dropout linear regulator U2, the input end of the low dropout linear regulator U1 is connected to the power supply bus VBUSC2 of the charging input connector 101 and the positive end (BAT+) of the battery through the first diode D1 and the second diode D2 respectively, and the output end of the low dropout linear regulator U2 is connected to the power supply end of the master control module 10 and the temperature data conversion module 20, so as to provide the working power supply VDD. When the charging input interface 101 is connected to external power supply through the mating male head 201, the power supply module 70 is mainly powered by the power supply bus VBUSC2, and when no external power supply is connected, the battery provides power.

[0050] In order to realize the gate drive of each insulated gate bipolar transistor or other semiconductor tube switch in the embodiment, in the embodiment, as shown in the figure, Figure 6As shown, two batteries are arranged in series, and a gate drive reference voltage is provided at the middle node (B1 node) between the first battery BT1 and the second battery, the B1 node is connected to the switch drive voltage signal input end of the temperature data conversion module 20, and is used as the gate drive reference voltage of the first switch Q1, and the gate drive reference voltage can also be provided to the power supply chip U3 as the drive reference voltage of the switch module 40 and the power conversion module 50. Wherein, the power supply module 60 is mainly realized by the management chip U1, and the management chip U1 can be selected as the PY32F002B type chip for example.

[0051] For the convenience of understanding the system state, the indicator light module 80 is also included in the embodiment, and the indicator light module 80 includes a first drive end, a second drive end and a third drive end, and a first light emitting diode, a second light emitting diode, a third light emitting diode and a fourth light emitting diode, wherein the cathode and the anode of the first light emitting diode are connected to the first drive end and the second drive end respectively, the second light emitting diode is connected in anti-parallel with the first light emitting diode, the cathode and the anode of the third light emitting diode are connected to the first drive end and the third drive end respectively, the fourth light emitting diode is connected in anti-parallel with the third light emitting diode, the first drive end, the second drive end and the third drive end are respectively connected to the corresponding indicator light drive end (including LED1, LED11, LED2, LED22, LED3, LED33) of the master control module 10 and the temperature data conversion module 20 through two resistors respectively, and the power supply module 60 is also connected to the master control module 10, the battery power is monitored through the master control module 10, the remaining power is displayed by controlling the number of lightings of the first light emitting diode to the fourth light emitting diode, and when the over-temperature protection is triggered and the power supply bus is disconnected, the flashing indication can be driven by the master control module 10 or the temperature data conversion module 20.

[0052] The utility model also provides an electronic equipment which includes the charging device, can effectively respond to the over-temperature of charging input interface, disconnects the charging circuit in time, protects the equipment and improves the electric safety.

[0053] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above-described embodiments only express several specific implementation manners of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A charging device, characterized by, The temperature data conversion module includes a first temperature signal input end and a temperature data output end, the first temperature signal input end is connected to the acquisition end of the first temperature sensitive resistor, the temperature data output end is connected to the temperature data input end of the master control module, and the temperature data conversion module includes a single-chip microcomputer chip. The master control module further includes a switch control signal output end and a charging power control signal output end, the switch control signal output end is connected to the control end of the switch module, the charging power control signal output end is connected to the control end of the power conversion module, and the master control module includes a power supply chip which can adjust and control the output power of the power conversion module. The first drive circuit includes a first switch, the input end of the first switch is connected to a working power supply, the output end of the first switch is connected to the acquisition end of the first temperature sensitive resistor through a first resistor, the input end and the control end of the first switch are connected through a second resistor, the control end of the first switch is connected to the protection enable control signal output end of the temperature data conversion module through a third resistor, the other end of the first temperature sensitive resistor is grounded, and the first temperature sensitive resistor is connected in parallel with a first capacitor. The switch module includes a second switch and a third switch, the second switch and the third switch are connected in series between the input end and the output end of the switch module, the control ends of the second switch and the third switch are connected to the switch control signal output end through a fourth resistor, and the control ends of the second switch and the third switch are also connected to the middle node of the second switch and the third switch through a fifth resistor. The power conversion module includes an input half-bridge and an output half-bridge connected to the input end and the output end of the power conversion module respectively, the input half-bridge and the output half-bridge are connected through an inductor, and the control ends of the input half-bridge and the output half-bridge are connected to the charging power control signal output end of the master control module.

2. The charging device of claim 1, wherein, The power supply module includes a power supply module and a power supply module, wherein 3. The charging device of claim 1, wherein, The power supply module includes a storage battery, and the positive end of the storage battery is connected to the output end of the power conversion module.

4. The charging device of claim 1, wherein, ​ 5. The charging device of claim 1, wherein, ​ 6. The charging device of claim 1, wherein, ​ ​ The power supply module comprises a low dropout linear regulator, input ends of the low dropout linear regulator are connected to a power supply bus of the charging input connector and a positive end of the battery through a first diode and a second diode respectively, and an output end of the low dropout linear regulator is connected to power supply ends of the main control module and the temperature data conversion module.

7. The charging device of claim 6, wherein, The battery is provided in series with at least two, and an intermediate node of one of the at least two batteries is connected to a switch driving voltage signal input end of the temperature data conversion module.

8. The charging device of claim 1, wherein, The indicator light module comprises a first driving end, a second driving end and a third driving end, and a first light emitting diode, a second light emitting diode, a third light emitting diode and a fourth light emitting diode, wherein a cathode and an anode of the first light emitting diode are connected to the first driving end and the second driving end respectively, the second light emitting diode is connected in reverse parallel with the first light emitting diode, a cathode and an anode of the third light emitting diode are connected to the first driving end and the third driving end respectively, the fourth light emitting diode is connected in reverse parallel with the third light emitting diode, and the first driving end, the second driving end and the third driving end are respectively connected to corresponding indicator light driving ends of the main control module and the temperature data conversion module through two resistors respectively.

9. An electronic device, comprising: The charging device comprises the charging device according to any one of claims 1 to 8.

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