A portable vehicle battery quick start device

Abstract

The present invention provides a portable vehicle battery quick start device, comprising: a power supply, two vehicle battery terminal connectors, a first polarity detection circuit, a power output polarity switching circuit and a microcontroller, wherein the microcontroller receives a polarity signal of a vehicle battery connected to the two vehicle battery terminal connectors detected from the first polarity detection circuit, and controls the power output polarity switching circuit to switch the polarity of the power supply output to the two vehicle battery terminal connectors according to the polarity signal of the vehicle battery, so that the polarity of the power supply output to the two vehicle battery terminal connectors matches the polarity of the vehicle battery connected to the two vehicle battery terminal connectors, and the power supply energizes the vehicle battery. The present invention automatically identifies the positive and negative poles of the vehicle battery to be started, and correspondingly adjusts the polarity of the power output of the device, thereby improving safety and being very convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply, and in particular relates to a portable vehicle battery quick starting device. Background Art

[0002] As people's living standards gradually improve, vehicles have become the main means of transportation. However, when the vehicle battery is insufficient, the vehicle cannot start.

[0003] Some users start the vehicle by connecting the positive and negative terminals of a low-charge battery to the positive and negative terminals of a fully-charged battery through a cable. However, when the other end of the cable is not connected to the positive and negative terminals of the fully-charged battery and a short circuit occurs, or when the positive and negative terminals are connected in reverse, sparks may be caused, which may damage the battery or cause personal injury, and the use is very inconvenient.

[0004] Various attempts have been made in the prior art to solve these technical problems. US Patent No. US5793185, issued on August 11, 1998, discloses a handheld jump starter having a control component and a circuit to prevent overcharging and incorrect connection with the battery.

[0005] The U.S. patent number is US10604024B2, and the authorization date is March 31, 2020. It discloses a portable vehicle battery quick-start device with a safety protection function. The device can detect whether the battery connection terminal is connected to the battery of the vehicle to be started through a battery detection sensor, and detect whether the battery connection terminal is correctly connected to the positive and negative poles of the battery of the vehicle to be started through a polarity detection sensor. If the battery detection sensor returns a signal that it has been connected to the battery of the vehicle to be started and the polarity detection sensor returns a signal that the positive and negative poles of the battery of the vehicle to be started are correctly connected, the device outputs a signal to turn on the power switch; if the battery detection sensor returns a signal that it is not connected to the battery of the vehicle to be started and / or the polarity detection sensor returns a signal that the positive and negative poles of the battery of the vehicle to be started are incorrectly connected, the device outputs a signal to turn off the power switch.

[0006] As mentioned above, although the prior art attempts to solve the above problems, each prior art solution has other disadvantages, whether it is complexity, cost, potential failure or convenience of use. Therefore, there is a need for further improvement of vehicle quick start devices in the art. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a portable vehicle battery quick-starting device, which can realize arbitrary connection between two vehicle battery terminal connectors and the positive and negative poles of the vehicle battery to be started. The device automatically identifies the positive and negative poles of the vehicle battery to be started and adjusts the polarity of the output power of the device accordingly, which is very convenient to use.

[0008] In order to solve the above technical problems, the present invention provides a portable vehicle battery quick starting device, comprising:

[0009] power supply;

[0010] Two vehicle battery terminal connectors, the two vehicle battery terminal connectors are used to electrically connect to two poles of a vehicle battery respectively;

[0011] a first polarity detection circuit, the first polarity detection circuit being electrically connected to the two vehicle battery terminal connectors, the first polarity detection circuit being used to detect polarities of the two vehicle battery terminal connectors connected to the two poles of the vehicle battery, and outputting polarity signals indicating the vehicle batteries connected to the two vehicle battery terminal connectors;

[0012] A power output polarity switching circuit, the power output polarity switching circuit being electrically connected to the power source and the two vehicle battery terminal connectors, the power output polarity switching circuit being used to switch the polarity of the power output to the two vehicle battery terminal connectors, and to make the power source electrically connected to the vehicle battery;

[0013] A microcontroller is used to receive polarity signals of the vehicle batteries connected to the two vehicle battery terminal connectors detected from the first polarity detection circuit, and control the power output polarity switching circuit to switch the polarity of the power output to the two vehicle battery terminal connectors according to the polarity signals of the vehicle battery, so that the polarity of the power output to the two vehicle battery terminal connectors matches the polarity of the vehicle batteries connected to the two vehicle battery terminal connectors, and the power supply supplies power to the vehicle battery.

[0014] Furthermore, the portable vehicle battery quick-start device also includes a second polarity detection circuit, which is electrically connected to the two vehicle battery terminal connectors. The second polarity detection circuit is used to detect the polarity of the two vehicle battery terminal connectors connected to the two poles of the vehicle battery, and output a polarity signal indicating the vehicle battery connected to the two vehicle battery terminal connectors.

[0015] Exemplarily, the power output polarity switching switch circuit includes a first power output polarity switching switch circuit and a second power output polarity switching switch circuit, and the first power output polarity switching switch circuit and the second power output polarity switching switch circuit are electrically connected to the two vehicle battery terminal connectors respectively.

[0016] Exemplarily, the first power output polarity switching switch circuit includes a first switch and a second switch, and the second power output polarity switching switch circuit includes a third switch and a fourth switch.

[0017] Exemplarily, the first switch, the second switch, the third switch and the fourth switch respectively include a plurality of MOSFETs connected in parallel.

[0018] Exemplarily, the first switch, the second switch, the third switch and the fourth switch respectively include relay switches.

[0019] Exemplarily, the power source includes a plurality of lithium-ion battery packs.

[0020] Exemplarily, the first polarity detection circuit includes an optical coupler sensor.

[0021] Furthermore, the portable vehicle battery quick-start device also includes a USB discharge circuit, and the USB discharge circuit is used for the power supply to charge an external device.

[0022] Furthermore, the portable vehicle battery quick-start device also includes a USB charging circuit, and the USB charging circuit is used for charging the power supply with an external power supply.

[0023] The portable vehicle battery quick starting device provided by the present invention is used to detect the polarity of the two vehicle battery terminal connectors connected to the two poles of the vehicle battery through a first polarity detection circuit, and output a polarity signal indicating the vehicle battery connected to the two vehicle battery terminal connectors. The microcontroller controls the power output polarity switching circuit to switch the polarity of the power output to the two vehicle battery terminal connectors according to the polarity signal, so that the polarity of the power output to the two vehicle battery terminal connectors matches the polarity of the vehicle batteries connected to the two vehicle battery terminal connectors. The power supply energizes the vehicle battery, realizes automatic identification of the polarity of the vehicle batteries connected to the two vehicle battery terminal connectors, and switches and matches the polarity of the power output accordingly. When using the starting device, the user connects the two vehicle battery terminal connectors to the two poles of the vehicle battery arbitrarily, without worrying about the positive and negative poles being connected back, which is more convenient to use and provides a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The present invention is a functional block diagram of a portable vehicle battery quick starting device provided by an embodiment of the present invention.

[0026] Figure 2 It is a circuit schematic diagram of a first polarity detection circuit and a power supply output polarity switching switch circuit provided in an embodiment of the present invention.

[0027] Figure 3 It is a circuit schematic diagram of a power supply part provided by an embodiment of the present invention.

[0028] Figure 4 It is a schematic diagram of a USB discharge circuit provided by an embodiment of the present invention.

[0029] Figure 5 It is a schematic diagram of a USB charging circuit provided by an embodiment of the present invention.

[0030] Figure 6 The invention discloses a power indicator light circuit schematic. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should also be noted that the directional terms such as left, right, up and down in the embodiments of the present invention are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0034] Figure 1 1 is a functional schematic block diagram of a portable vehicle battery quick start device provided by an embodiment of the present invention. Figure 1As shown, the portable vehicle battery quick start device includes a power source 10, two vehicle battery terminal connectors 20, a first polarity detection circuit 30, a power output polarity switching circuit 40 and a microcontroller 50;

[0035] The power supply 10 includes a plurality of lithium-ion battery packs 101, a battery pack management circuit 102 and a power control circuit 103. The lithium-ion battery pack 101 stores sufficient energy and can output a large current to quickly start the vehicle. The battery pack composed of the lithium-ion battery 101 has a large instantaneous discharge current and can be repeatedly charged and discharged. The battery pack specifically includes the number of lithium-ion batteries, which is determined according to the set maximum output current, and can start the vehicle. The power supply 10 can be an internal power supply arranged in a portable vehicle battery quick start device. In terms of the specific structural form of the product, the power supply 10 can be separated from the portable vehicle battery quick start device, electrically connected in a detachable manner, or integrated in a housing. The battery pack management circuit 102 is used to manage the charging and discharging safety and overheating protection of the lithium-ion battery pack 101, and the power control circuit 103 is used to control the charging or discharging of the lithium-ion battery pack 101. The battery pack management circuit 102 and the power control circuit 103 are conventional circuits in the field and will not be described in detail here.

[0036] The two vehicle battery terminal connectors 20 are used to electrically connect to the two poles of the vehicle battery respectively. The two vehicle battery terminal connectors 20 can be electrically connected to the two poles of the vehicle battery at will. The two vehicle battery terminal connectors 20 can be the free ends of the cable or the clips connected to the cable. The specific forms are various and are not specifically limited here. The two vehicle battery terminal connectors 20 can be exactly the same without distinguishing between the positive and negative poles.

[0037] The first polarity detection circuit 30 is electrically connected to the two vehicle battery terminal connectors 20. The first polarity detection circuit 30 is connected across the two vehicle battery terminal connectors 20. The first polarity detection circuit 30 is used to detect the polarity of the two vehicle battery terminal connectors 20 connected to the two poles of the vehicle battery, and output a polarity signal indicating the vehicle battery connected to the two vehicle battery terminal connectors 20, that is, the first polarity detection circuit 30 can detect which of the two vehicle battery terminal connectors 20 is connected to the positive pole of the vehicle battery, and which of the two vehicle battery terminal connectors 20 is connected to the negative pole of the vehicle battery, and automatically identify the polarity of the vehicle battery. After the first polarity detection circuit 30 identifies the positive pole and the negative pole of the vehicle battery, it outputs an indication signal to the microcontroller 50. For example, the two vehicle battery terminal connectors 20 include a first vehicle battery terminal connector and a second vehicle battery terminal connector, and the first vehicle battery terminal connector and the second vehicle battery terminal connector are respectively connected to the two poles of the vehicle battery, and the first polarity detection circuit 30 automatically detects whether the first vehicle battery terminal connector is connected to the positive pole or the negative pole, and whether the second vehicle battery terminal connector is connected to the negative pole or the positive pole.

[0038] The power output polarity switching circuit 40 is electrically connected to the power supply 10 and the two vehicle battery terminal connectors 20. The power output polarity switching circuit 40 is used to switch the polarity of the power supply 10 output to the two vehicle battery terminal connectors 20, and to make the power supply 10 electrically connected to the vehicle battery. For example, when the first polarity detection circuit 30 detects that the first vehicle battery terminal connector is connected to the negative pole of the vehicle battery, and the second vehicle battery terminal connector is connected to the positive pole of the vehicle battery, and the current power supply 10 outputs positive to the first vehicle battery terminal connector and negative to the second vehicle battery terminal connector, then the power output polarity switching circuit 40 is switched and electrically connected, so that the power supply 10 outputs negative to the first vehicle battery terminal connector and positive to the second vehicle battery terminal connector, thereby energizing the positive and negative poles of the vehicle battery to start the car.

[0039] The microcontroller 50 is used to receive the polarity signal of the vehicle battery connected to the two vehicle battery terminal connectors 20 detected from the first polarity detection circuit 30, and control the power output polarity switching circuit 40 to switch the polarity of the power output to the two vehicle battery terminal connectors 20 according to the polarity signal of the vehicle battery, so that the polarity of the power supply 10 output to the two vehicle battery terminal connectors 20 matches the polarity of the vehicle battery connected to the two vehicle battery terminal connectors 20, and the power supply 10 energizes the vehicle battery. The microcontroller 50 can select the supplier and model according to specific needs, which will not be described in detail here, and those skilled in the art can make appropriate selections according to actual needs.

[0040] The portable vehicle battery quick start device provided in this embodiment detects the polarity of the two vehicle battery terminal connectors 20 connected to the two poles of the vehicle battery through the first polarity detection circuit 30, and outputs a polarity signal indicating the vehicle battery connected to the two vehicle battery terminal connectors 20. The microcontroller 50 controls the power output polarity switching circuit 40 to switch the polarity of the power output to the two vehicle battery terminal connectors 20 according to the polarity signal of the vehicle battery, so that the polarity of the power supply 10 output to the two vehicle battery terminal connectors 20 matches the polarity of the vehicle battery connected to the two vehicle battery terminal connectors 20. The power supply 10 powers the vehicle battery, and the user does not need to distinguish the positive and negative poles of the two vehicle battery terminal connectors 20. The two vehicle battery terminal connectors 20 can be connected to the positive and negative poles of the vehicle battery at will. The polarity of the vehicle battery connected to the two vehicle battery terminal connectors 20 is automatically detected and the power polarity is automatically switched to a state matching the two vehicle battery terminal connectors 20 to realize power-on starting of the vehicle. It is more convenient for users to use, and there will be no dangerous situation of sparks causing explosions due to reverse connection of the positive and negative poles, thereby improving safety.

[0041] In this embodiment, the portable vehicle battery quick start device further includes a second polarity detection circuit 60, which is electrically connected to the two vehicle battery terminal connectors 20. The second polarity detection circuit 60 is used to detect the polarity of the two vehicle battery terminal connectors 20 connected to the two poles of the vehicle battery, and output a polarity signal indicating the vehicle battery connected to the two vehicle battery terminal connectors 20. That is, the second polarity detection circuit 60 can detect which of the two vehicle battery terminal connectors 20 is connected to the positive pole of the vehicle battery, and which of the two vehicle battery terminal connectors 20 is connected to the negative pole of the vehicle battery, and automatically identify the polarity of the vehicle battery. After the second polarity detection circuit 60 identifies the positive pole and the negative pole of the vehicle battery, it outputs an indication signal to the microcontroller 50. For example, the two vehicle battery terminal connectors 20 include a first vehicle battery terminal connector and a second vehicle battery terminal connector, and the first vehicle battery terminal connector and the second vehicle battery terminal connector are respectively connected to the two poles of the vehicle battery, and the second polarity detection circuit 60 automatically detects whether the first vehicle battery terminal connector is connected to the positive pole or the negative pole, and whether the second vehicle battery terminal connector is connected to the negative pole or the positive pole. The first polarity detection circuit 30 and the second polarity detection circuit 60 respectively perform polarity detection and output indication signals respectively. The microcontroller 50 determines whether it is necessary to switch the polarity of the power output to the two vehicle battery terminal connectors 20 according to the two signals. The detection result is more accurate, avoiding accidents caused by detection errors. Moreover, when any one of the first polarity detection circuit 30 and the second polarity detection circuit 60 fails, the other one can still work normally, thereby improving safety.

[0042] In this embodiment, the power output polarity switching switch circuit 40 includes a first power output polarity switching switch circuit 41 and a second power output polarity switching switch circuit 42, and the first power output polarity switching switch circuit 41 and the second power output polarity switching switch circuit 42 are respectively electrically connected to two vehicle battery terminal connectors 20. The first power output polarity switching switch circuit 41 includes a first switch 410 and a second switch 411, and the second power output polarity switching switch circuit 42 includes a third switch 420 and a fourth switch 421.

[0043] In this embodiment, the first switch 410, the second switch 411, the third switch 420 and the fourth switch 421 each include two MOSFETs connected in parallel. Of course, in other embodiments, three MOSFETs may be connected in parallel, which is only an example and not a limitation of the present technical solution. Specifically, the first switch 410 includes two parallel MOSFETs (Q15 and Q16), the second switch 411 includes two parallel MOSFETs (Q19 and Q20), the third switch 420 includes two parallel MOSFETs (Q21 and Q22), and the fourth switch 421 includes two parallel MOSFETs (Q17 and Q18). The two MOSFETs are connected in parallel to disperse the power output by the power supply 10. When the signal output by the microcontroller 50 to the first switch 410, the second switch 411, the third switch 420 and the fourth switch 421 is at a high level, the MOSFETs Q15, Q16, Q19, Q20, Q21, Q22, Q17 and Q18 are all in a high resistance state, and all MOSFETs are turned off. Therefore, the power supply 10 is disconnected from the vehicle battery. Only one of the first switch 410 and the second switch 411 can be turned on at the same time, and only one of the third switch 420 and the fourth switch 421 can be turned on at the same time. The switching of the output power polarity is achieved by switching between the first switch 410 and the second switch 411 and between the third switch 420 and the fourth switch 421. When the signal output by the microcontroller 50 to the first switch 410 or the second switch 411, the third switch 420 or the fourth switch 421 is at a low level, the corresponding MOSFET is in a low resistance state and the corresponding MOSFET is turned on. Therefore, the power supply 10 is electrically connected to the vehicle battery to quickly start the vehicle engine.

[0044] In this embodiment, the first polarity detection circuit 30 includes an optocoupler sensor D10 and an optocoupler sensor D11. When the first vehicle battery terminal connector is connected to the positive electrode of the vehicle battery and the second vehicle battery terminal connector is connected to the negative electrode of the vehicle battery, the optocoupler sensor D11 is turned on and sends a "0" or low-level signal to the microcontroller 50, and the optocoupler sensor D10 is not turned on and sends a "1" or high-level signal to the microcontroller 50; when the first vehicle battery terminal connector is connected to the negative electrode of the vehicle battery and the second vehicle battery terminal connector is connected to the positive electrode of the vehicle battery, the optocoupler sensor D10 is turned on and sends a "0" or low-level signal to the microcontroller 50, and the optocoupler sensor D11 is not turned on and sends a "1" or high-level signal to the microcontroller 50. The microcontroller 50 can determine the polarity of the vehicle batteries connected to the two vehicle battery terminal connectors 20 respectively according to the conduction state of the optical coupler sensor D10 and the optical coupler sensor D11, thereby controlling the switching and switching of the power output polarity switching circuit 40, so that the polarity of the power output by the power supply 10 to the two vehicle battery terminal connectors 20 corresponds to the polarity of the vehicle batteries connected thereto.

[0045] In this embodiment, the second polarity detection circuit 60 includes a comparator D13, two input terminals of the comparator D13 are electrically connected to two vehicle battery terminal connectors 20, the two vehicle battery terminal connectors 20 are respectively connected to the positive electrode and the negative electrode of the vehicle battery, and the polarity of the vehicle battery connected to the two vehicle battery terminal connectors 20 is determined according to the signal output by the comparator D13. This avoids the situation where the polarity of the vehicle battery connected to the two vehicle battery terminal connectors 20 is inaccurate when only the first polarity detection circuit 30 is used to detect the inaccurate polarity, and double detection is performed to increase the accuracy of detection and improve safety.

[0046] In this embodiment, the portable vehicle battery quick start device also includes a USB discharge circuit 70, which is used for the power supply 10 to charge external devices. The portable vehicle battery quick start device can charge a mobile terminal and has the function of an ordinary power bank, so that the portable vehicle battery quick start device has a wider application range, increases the product utilization rate, and solves the user's unexpected needs. The power bank technology is already a very mature technology and will not be described in detail here.

[0047] In this embodiment, the portable vehicle battery quick start device further includes a USB charging circuit 80, which is used for an external power source to charge the power source 10. Charging devices with USB interfaces are now widely used, and can share a USB charging plug with other devices, making charging more convenient. When the charging cable is lost, the USB charging cable of other smart terminals can also be used for charging, which has good compatibility.

[0048] In some other embodiments, the first switch 410, the second switch 411, the third switch 420 and the fourth switch 421 include relay switches. Relays are commonly used devices in the field of switches and are not described here. Of course, in some other embodiments, other methods can also be used.

[0049] In this embodiment, the microcontroller 50 may be one or more control chips that collaboratively process different tasks, and is not limited to one control chip.

[0050] In this embodiment, the portable vehicle battery quick-start device also includes a button assembly 90 and a power indicator light 00. The button assembly 90 includes an on button. When the portable vehicle battery quick-start device is used, the on button is pressed and the power indicator light 00 lights up, indicating that the portable vehicle battery quick-start device has been powered on and can be used.

[0051] It should be noted that the present invention discloses only part of the circuit schematics, and those skilled in the art can implement other conventional functions without creative work. The part of the circuit schematics listed here are only examples and are not intended to limit the present technical solution.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable vehicle battery quick start device, characterized in that: include: power supply; Two vehicle battery terminal connectors, the two vehicle battery terminal connectors are used to electrically connect to two poles of a vehicle battery respectively; a first polarity detection circuit, the first polarity detection circuit being electrically connected to the two vehicle battery terminal connectors, the first polarity detection circuit being used to detect polarities of the two vehicle battery terminal connectors connected to the two poles of the vehicle battery, and outputting polarity signals indicating the vehicle batteries connected to the two vehicle battery terminal connectors; a second polarity detection circuit, the second polarity detection circuit being electrically connected to the two vehicle battery terminal connectors, the second polarity detection circuit being used to detect polarities of the two vehicle battery terminal connectors connected to the two poles of the vehicle battery, and outputting polarity signals indicating the vehicle batteries connected to the two vehicle battery terminal connectors; A power output polarity switching circuit, the power output polarity switching circuit being electrically connected to the power source and the two vehicle battery terminal connectors, the power output polarity switching circuit being used to switch the polarity of the power output to the two vehicle battery terminal connectors, and to make the power source electrically connected to the vehicle battery; The power output polarity switching switch circuit includes a first power output polarity switching switch circuit and a second power output polarity switching switch circuit, and the first power output polarity switching switch circuit and the second power output polarity switching switch circuit are electrically connected to the two vehicle battery terminal connectors respectively; The first power supply output polarity switching switch circuit includes a first switch and a second switch, and the second power supply output polarity switching switch circuit includes a third switch and a fourth switch; A microcontroller is used to receive polarity signals of the vehicle batteries connected to the two vehicle battery terminal connectors detected from the first polarity detection circuit, and control the power output polarity switching circuit to switch the polarity of the power output to the two vehicle battery terminal connectors according to the polarity signals of the vehicle battery, so that the polarity of the power output to the two vehicle battery terminal connectors matches the polarity of the vehicle batteries connected to the two vehicle battery terminal connectors, and the power supply supplies power to the vehicle battery.

2. The portable vehicle battery quick starting device according to claim 1, characterized in that: The first switch, the second switch, the third switch and the fourth switch respectively include a plurality of MOSFETs connected in parallel.

3. The portable vehicle battery quick starting device according to claim 1, characterized in that: The first switch, the second switch, the third switch and the fourth switch respectively include relay switches.

4. The portable vehicle battery quick starting device according to claim 1, characterized in that: The power source includes a plurality of lithium-ion battery packs.

5. The portable vehicle battery quick starting device according to claim 1, characterized in that: The first polarity detection circuit includes a photocoupler sensor.

6. The portable vehicle battery quick starting device according to claim 1, characterized in that: The portable vehicle battery quick start device further comprises a USB discharge circuit, and the USB discharge circuit is used for the power source to charge an external device.

7. The portable vehicle battery quick starting device according to claim 1, characterized in that: The portable vehicle battery quick start device further comprises a USB charging circuit, and the USB charging circuit is used for charging the power supply from an external power source.

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