Emergency power supply

Abstract

The utility model relates to an emergency power supply comprising a battery; the charging and discharging circuit is electrically connected with the battery; the controller is electrically connected with the charging and discharging circuit; the voltage sampling circuit comprises a first switching device and a second switching device, the first end of the first switching device is electrically connected with the control port of the controller, the second end of the first switching device is grounded, and the third end of the first switching device is electrically connected with the first end of the second switching device; the second end of the second switching device is electrically connected with the battery, and the third end of the second switching device is electrically connected with the feedback port of the controller. The charging circuit has the advantages that when the battery is in a charging or discharging process, the controller can control the first switching device and the second switching device to be switched on, so that the feedback port can output a battery voltage sampling result, and the charging safety is further ensured; otherwise, the controller can control the first switching device and the second switching device to be switched off through the control port, so that the voltage sampling of the battery is ended, and the power consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, and in particular to an emergency power supply. Background Technology

[0002] An emergency power supply is a portable backup power source that is commonly used outdoors to provide power to various electronic devices such as communication equipment, positioning devices, lighting, laptops, and mobile phones.

[0003] For example, Chinese utility model patent with patent number ZL 201921851662.4 (authorization announcement number CN 211296220U) discloses an emergency power supply with wireless charging function, including a shell, a battery, a wireless charging and discharging module, a lighting and alarm indicator module, and an LED digital display module. The lighting and alarm indicator module includes a lamp board and a lamp cover. The lamp board is equipped with a white lighting lamp, a red alarm indicator, and a blue alarm indicator. The lamp cover is placed on the outside of the lamp board. The wireless charging and discharging module is connected to the wireless charging and discharging coil.

[0004] While the aforementioned emergency power supply can manage and protect the entire battery pack through a multi-cell lithium battery protection circuit, providing overcharge, over-discharge, overcurrent, overvoltage, short circuit, and over-temperature protection for each cell to ensure product safety, reliability, and stability during use, the emergency power supply still needs to perform charging detection and control circuitry when the lithium battery pack is not charging or discharging. This consumes the lithium battery pack's power. Therefore, further improvements to the existing technology are needed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an emergency power supply that can reduce power consumption, in contrast to the above-mentioned prior art.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an emergency power supply, comprising:

[0007] Battery;

[0008] The charging and discharging circuit is electrically connected to the battery and is used to control the charging or discharging of the battery.

[0009] The controller is electrically connected to the charging and discharging circuit.

[0010] Its features also include:

[0011] A voltage sampling circuit includes a first switching device and a second switching device. The first terminal of the first switching device is electrically connected to the control port of the controller, the second terminal of the first switching device is grounded, the third terminal of the first switching device is electrically connected to the first terminal of the second switching device, the second terminal of the second switching device is electrically connected to the battery, and the third terminal of the second switching device is electrically connected to the feedback port of the controller.

[0012] The voltage sampling circuit is configured such that: during the charging or discharging process of the battery, the controller outputs a first control signal to the control port to control the first and second switching devices to be turned on, thereby enabling the feedback port to output the battery voltage sampling result; during the non-charging or non-discharging process of the battery, the controller outputs a second control signal to the control port to control the first and second switching devices to be turned off.

[0013] Preferably, the third terminal of the second switching device is electrically connected to the feedback port of the controller through a voltage divider circuit, the first input port of the voltage divider circuit is electrically connected to the third terminal of the second switching device, the second input port of the voltage divider circuit is grounded, and the output terminal of the voltage divider circuit is electrically connected to the feedback port of the controller.

[0014] Preferably, the first switching device is a transistor, the base of the transistor is the first terminal of the first switching device, the emitter of the transistor is the second terminal of the first switching device, and the collector of the transistor is the third terminal of the first switching device.

[0015] Preferably, the second switching device is a MOSFET, the gate of the MOSFET is the first terminal of the second switching device, the source of the MOSFET is the second terminal of the second switching device, and the drain of the MOSFET is the third terminal of the second switching device.

[0016] Preferably, the first control signal is high level and the second control signal is low level.

[0017] In order to enable the emergency power supply to be used as a power bank, the charging and discharging circuit has a charging port and a discharging port. The charging port is a Type-C charging port, and the discharging port includes a Type-C port and a USB port.

[0018] To accommodate lower current detection, an output current detection circuit is also included. The output current detection circuit includes an operational amplifier. The input terminal of the operational amplifier is electrically connected to the output port of the charging and discharging circuit, and the output terminal of the operational amplifier is electrically connected to the controller.

[0019] Compared with the prior art, the advantages of this utility model are as follows: By setting a voltage sampling circuit, on the one hand, during the charging or discharging process of the battery, the controller outputs a first control signal to the control port to control the first and second switching devices to conduct, thereby enabling the feedback port to output the battery voltage sampling result. Therefore, the emergency power supply can ensure charging safety through the sampling of the voltage sampling circuit. On the other hand, during the non-charging or non-discharging process of the battery, the controller outputs a second control signal to the control port to control the first and second switching devices to turn off, thereby ending the battery voltage sampling, reducing power consumption, and achieving the function of ultra-low standby power consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the emergency power supply structure in an embodiment of this utility model;

[0021] Figure 2 for Figure 1 Exploded view;

[0022] Figure 3 This is a circuit diagram of the voltage sampling circuit in an embodiment of this utility model;

[0023] Figure 4 This is a circuit diagram of the controller in an embodiment of this utility model;

[0024] Figure 5 This is an interface circuit diagram of the charging and discharging circuit in an embodiment of this utility model;

[0025] Figure 6 This is a circuit diagram of the output current detection circuit in an embodiment of this utility model;

[0026] Figure 7 This is a partial circuit diagram of the charge / discharge protection circuit in an embodiment of this utility model;

[0027] Figure 8 This is a circuit diagram of the charging circuit in the charging and discharging circuit of this utility model embodiment;

[0028] Figure 9 This is another part of the circuit diagram of the charge and discharge protection circuit in this embodiment of the present invention;

[0029] Figure 10 This is a circuit diagram of the voltage conversion circuit in an embodiment of the present invention;

[0030] Figure 11 This is a circuit diagram of the light source control circuit in an embodiment of this utility model;

[0031] Figure 12 This is a circuit diagram of the button control circuit in an embodiment of this utility model. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 and Figure 2 As shown, the emergency power supply in this embodiment includes a housing formed by the mating of an upper cover 2, a circuit board fixing member 6, and a lower cover 9. A circuit board 5 is arranged between the upper cover 2 and the circuit board fixing member 6, and a battery 7 is arranged between the circuit board fixing member 6 and the lower cover 9. A plate 1 is provided on the surface of the upper cover 2. A charging port and a power port are respectively provided at the two opposite ends of the circuit board fixing member 6. Correspondingly, a charging plug 3 for blocking the charging port and a power plug 11 for blocking the power port are also provided at the two opposite ends of the circuit board fixing member 6. A first sealing ring 4 is provided circumferentially on the lower surface of the upper cover 2, and a second sealing ring 8 is provided circumferentially on the upper surface of the lower cover 9. A pressure plate 10 is also provided at one end of the battery 7. In addition, a lamp panel 12, a lampshade 13, a light source button 141, and a power button 142 of the emergency power supply are also provided inside the housing. A light source (not shown in the figure) is provided on the lamp panel 12. The light source button 141 and the power button 142 of the emergency power supply are at least partially exposed on the upper cover 2.

[0034] like Figure 2 As shown, the charging port includes a Type-C port 61, which can also be used as a discharge port for an emergency power supply. Below the charging port is a USB port 62, which also serves as a discharge port for an emergency power supply. The Type-C port 61 supports fast charging protocols, and this emergency power supply can also be used as a power bank. Additionally, as... Figure 2 As shown, the power port 63 in this embodiment is also a discharge port. The power port 63 is commonly used as a port for inserting a power clip when starting a car.

[0035] like Figures 1-12 As shown, the emergency power supply in this embodiment includes a battery, a charging / discharging circuit, a controller, and a voltage sampling circuit. The charging / discharging circuit is electrically connected to the battery and controls its charging or discharging. The controller is electrically connected to the charging / discharging circuit. The voltage sampling circuit includes a first switching device and a second switching device. The first terminal of the first switching device is electrically connected to the control port of the controller, the second terminal of the first switching device is grounded, the third terminal of the first switching device is electrically connected to the first terminal of the second switching device, the second terminal of the second switching device is electrically connected to the battery, and the third terminal of the second switching device is electrically connected to the feedback port of the controller. The third terminal of the second switching device is electrically connected to the feedback port of the controller via a voltage divider circuit. The first input port of the voltage divider circuit is electrically connected to the third terminal of the second switching device, the second input port of the voltage divider circuit is grounded, and the output terminal of the voltage divider circuit is electrically connected to the feedback port of the controller.

[0036] The voltage sampling circuit is configured such that: during the charging or discharging process of the battery, the controller outputs a first control signal to the control port to control the first and second switching devices to turn on, thereby enabling the feedback port to output the battery voltage sampling result; during the non-charging or non-discharging process of the battery, the controller outputs a second control signal to the control port to control the first and second switching devices to turn off.

[0037] like Figure 3 As shown, in this embodiment, the first switching device is a transistor Q9. The base of transistor Q9 is the first terminal of the first switching device, the emitter of transistor Q9 is the second terminal of the first switching device, and the collector of transistor Q9 is the third terminal of the first switching device.

[0038] like Figure 3 As shown, in this embodiment, the second switching device is a MOSFET Q8. The gate of the MOSFET Q8 is the first terminal of the second switching device, the source of the MOSFET Q8 is the second terminal of the second switching device, and the drain of the MOSFET Q8 is the third terminal of the second switching device.

[0039] like Figure 3 As shown, the voltage divider circuit in this embodiment includes a first resistor R39 and a second resistor R40 connected in series. The other end of the first resistor R39 corresponds to the first input port of the voltage divider circuit, and the other end of the second resistor R40 corresponds to the second input port of the voltage divider circuit. The connection position between the first resistor R39 and the second resistor R40 corresponds to the output terminal of the voltage divider circuit.

[0040] like Figure 3 As shown, in this embodiment, the first control signal is high level and the second control signal is low level.

[0041] The charging and discharging circuit has a charging port and a discharging port. The charging port is a Type-C charging port, and the discharging ports include a Type-C port and a USB port. The specific circuit is as follows: Figure 5 As shown, Figure 5 TYPECOUT+ and TYPECOUT- are the positive and negative terminals of the Type-C port, respectively. Both the Type-C port and the Type-C charging port support fast charging protocols. USBOUT+ and USBOUT- are the positive and negative terminals of the USB output interface, respectively.

[0042] In addition, the emergency power supply also includes an output current detection circuit, which includes an operational amplifier. The input of the operational amplifier is electrically connected to the output port of the charging and discharging circuit, and the output of the operational amplifier is electrically connected to the controller. Figure 6 As shown, the operational amplifier is chip IC2. Chip IC2 amplifies the acquired current and transmits the amplified result to the controller, as shown below. Figure 6As shown, this output current detection circuit can collect the current output from the Type-C port and transmit it to the controller via the AD-Type-C port; it can also collect the current output from the USB output interface and transmit it to the controller via the AD-USB port. Figure 4 As shown, the controller in this embodiment uses chip IC5, which has 28 pins. This chip IC5 is existing technology and will not be described in detail here.

[0043] The charging and discharging circuit in this embodiment also includes a charging and discharging protection circuit and a charging circuit. The charging and discharging protection circuit is specifically as follows: Figure 7 and Figure 9 As shown, this charge / discharge protection circuit uses an NTC thermistor for detection to prevent overheating during charging and discharging, which could lead to safety accidents. The charging circuit is specifically as follows: Figure 8 As shown.

[0044] The emergency power supply also includes a voltage conversion circuit, a light source control circuit, and a button control circuit. The voltage conversion circuit, for example... Figure 10 As shown, it obtains the 4.4V voltage to power the controller by converting the battery voltage Vbat; the light source control circuit is as follows. Figure 11 As shown, the LED light source is controlled via the SW-LEDW and SW-LEDR ports of the controller; the button control circuit is as follows... Figure 12 As shown, the light source button 141 corresponds to K2, and the power button 142 corresponds to K1.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An emergency power supply, comprising: Battery; The charging and discharging circuit is electrically connected to the battery and is used to control the charging or discharging of the battery. The controller is electrically connected to the charging and discharging circuit. Its features also include: A voltage sampling circuit includes a first switching device and a second switching device. The first terminal of the first switching device is electrically connected to the control port of the controller, the second terminal of the first switching device is grounded, the third terminal of the first switching device is electrically connected to the first terminal of the second switching device, the second terminal of the second switching device is electrically connected to the battery, and the third terminal of the second switching device is electrically connected to the feedback port of the controller. The voltage sampling circuit is configured such that: during the charging or discharging process of the battery, the controller outputs a first control signal to the control port to control the first and second switching devices to be turned on, thereby enabling the feedback port to output the battery voltage sampling result; during the non-charging or non-discharging process of the battery, the controller outputs a second control signal to the control port to control the first and second switching devices to be turned off.

2. The emergency power supply according to claim 1, characterized in that: The third terminal of the second switching device is electrically connected to the feedback port of the controller through a voltage divider circuit. The first input port of the voltage divider circuit is electrically connected to the third terminal of the second switching device. The second input port of the voltage divider circuit is grounded. The output terminal of the voltage divider circuit is electrically connected to the feedback port of the controller.

3. The emergency power supply according to claim 2, characterized in that: The first switching device is a transistor (Q9), the base of the transistor (Q9) is the first terminal of the first switching device, the emitter of the transistor (Q9) is the second terminal of the first switching device, and the collector of the transistor (Q9) is the third terminal of the first switching device.

4. The emergency power supply according to claim 3, characterized in that: The second switching device is a MOSFET (Q8), the gate of the MOSFET (Q8) is the first terminal of the second switching device, the source of the MOSFET (Q8) is the second terminal of the second switching device, and the drain of the MOSFET (Q8) is the third terminal of the second switching device.

5. The emergency power supply according to claim 4, characterized in that: The first control signal is high level, and the second control signal is low level.

6. The emergency power supply according to any one of claims 1 to 5, characterized in that: The charging and discharging circuit has a charging port and a discharging port. The charging port is a Type-C charging port, and the discharging port includes a Type-C port and a USB port.

7. The emergency power supply according to claim 6, characterized in that: It also includes an output current detection circuit, which includes an operational amplifier. The input terminal of the operational amplifier is electrically connected to the output port of the charging and discharging circuit, and the output terminal of the operational amplifier is electrically connected to the controller.

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