Automobile emergency starting power supply

Abstract

The application provides an automobile emergency starting power supply, comprising: an energy storage unit, provided with a charging interface and a discharging interface; a charging and discharging connector, a first end of the charging and discharging connector is connected to the discharging interface of the energy storage unit through a first switch, and a second end of the charging and discharging connector is configured to be connected to an external device; a charging voltage regulating circuit, an input end of the charging voltage regulating circuit is connected to the second end of the charging and discharging connector through a second switch, and an output end of the charging voltage regulating circuit is connected to the charging interface of the energy storage unit, and the charging voltage regulating circuit is configured to adjust the voltage input by the charging and discharging connector to a preset charging voltage. The application can directly discharge the external device through the charging and discharging connector or charge the energy storage unit through the external device, and the charging voltage regulating circuit is used for protecting the energy storage unit, avoiding charging damage to the energy storage unit, and improving the convenience and safety of charging the energy storage unit.

Description

Technical Field

[0001] This application relates to the field of power supply technology, specifically to an automotive emergency jump starter. Background Technology

[0002] With the increase in car ownership, commuting has become much more convenient. However, electricity is not readily available in all areas, especially during long-distance travel or when driving in remote or wilderness areas, which can easily lead to car breakdowns. When a car battery is left unused for an extended period or in extremely cold weather, resulting in a low charge or insufficient starting power, a car jump starter is needed to restart the engine and ensure the car can continue to run.

[0003] The primary function of a car jump starter is to start a car when it is out of power or cannot be started for other reasons. However, current car jump starters on the market still have some pain points that need to be addressed. One pain point is that some car jump starters experience significant energy loss after jump-starting or providing emergency power, requiring timely replenishment to maintain power for the next use. Otherwise, it will affect future use or, if left idle for a period of time, the internal battery may become depleted, affecting the lifespan of the device.

[0004] Furthermore, traditional emergency power supplies primarily rely on USB, Type-C, DC in, or other charger ports to charge the device. This method severely limits the energy sources available for charging and cannot meet diverse charging needs. Traditional charging methods for emergency jump starters are relatively limited, offering insufficient flexibility in replenishing the internal battery after discharge. They cannot reliably utilize a car engine for power, and even when using a car engine to charge the internal battery, the high output voltage of a running engine could damage the battery during charging.

[0005] Therefore, there is an urgent need for a new type of emergency power source for jump-starting, recharging, and starting car batteries, which can broaden charging methods, improve practicality and safety, and meet the growing market demand. Utility Model Content

[0006] In view of the problems of the limited variety and poor practicality of existing emergency jump starters, the purpose of this application is to provide an automotive emergency jump starter that broadens the charging methods of emergency jump starters and improves the convenience and safety of energy storage unit charging.

[0007] This application provides an embodiment of an automotive emergency jump starter, comprising: The energy storage unit is equipped with a charging interface and a discharging interface; A charge-discharge connector, the first end of which is connected to the discharge interface of the energy storage unit via a first switch, and the second end of which is configured to connect to an external device; The charging voltage regulation circuit has its input terminal connected to the second terminal of the charging and discharging connector via a second switch, and its output terminal connected to the charging interface of the energy storage unit. The charging voltage regulation circuit is configured to adjust the voltage input to the charging and discharging connector to a preset charging voltage.

[0008] In some embodiments, the charging voltage regulation circuit includes an input filter unit and a DC-DC conversion circuit. The second end of the charging and discharging connector is connected to the input end of the DC-DC conversion circuit through the input filter unit, and the output end of the DC-DC conversion circuit is connected to the charging interface of the energy storage unit.

[0009] In some embodiments, a third switch is also included, and the output of the charging voltage regulation circuit is connected to the charging interface of the energy storage unit through the third switch.

[0010] In some embodiments, the charging voltage regulation circuit includes an energy buffer unit, the output of which is connected to the charging interface of the energy storage unit via a third switch.

[0011] In some embodiments, the charging voltage regulation circuit includes an energy buffer unit and a DC-DC conversion circuit. The output of the energy buffer unit is connected to the charging interface of the energy storage unit in sequence through the DC-DC conversion circuit and a third switch.

[0012] In some embodiments, the charging voltage regulation circuit includes an energy buffer unit and a current limiting unit, and the output terminal of the energy buffer unit is connected to the charging interface of the energy storage unit in sequence through the current limiting unit and a third switch.

[0013] In some embodiments, a charging port is also included, which is connected to the input of the charging voltage regulation circuit.

[0014] In some embodiments, the device includes multiple types of charging ports and multiple charging voltage regulation circuits. Each charging port is connected to the input terminal of a corresponding charging voltage regulation circuit, and the second end of the charging / discharging connector is connected to the input terminal of at least one charging voltage regulation circuit via a second switch.

[0015] In some embodiments, a self-locking switch button and a control circuit are also included, wherein the signal output terminal of the self-locking switch button is connected to the control circuit, and the control circuit is configured to control the opening and closing of the second switch in response to the signal of the self-locking switch button.

[0016] In some embodiments, the system further includes a voltage detection unit and a control circuit. The voltage detection unit is used to detect the terminal voltage of the charging / discharging connector and send the terminal voltage signal to the control circuit. The control circuit is configured to control the opening and closing of the second switch in response to the terminal voltage signal.

[0017] The automotive emergency jump starter provided in this application has the following advantages: By adopting this application, the energy storage unit can be directly discharged to external devices or charged through external devices via the charging and discharging connector. During discharge, it can jump-start the car battery for emergency starting. During charging, it can replenish the energy storage unit. The energy storage unit is protected by the charging voltage regulation circuit to prevent damage during charging. This improves the convenience and safety of charging the energy storage unit, broadens the charging methods for car emergency jump starters, reduces the occurrence of under-powered or depleted emergency jump starters, meets the emergency starting needs in different scenarios, improves practicality, and meets the growing market demand. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0019] Figure 1 This is a structural block diagram of an embodiment of an automotive emergency jump starter power supply according to this application; Figure 2 This is a schematic diagram illustrating the application of an automotive emergency jump starter according to an embodiment of this application; Figure 3 This is a schematic diagram illustrating the application of a car emergency jump starter according to another embodiment of this application; Figure 4 This is a schematic diagram illustrating the application of a car emergency jump starter according to another embodiment of this application; Figure 5 This is a schematic diagram illustrating the application of an automotive emergency jump starter according to another embodiment of this application. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The words “or” and “or” in the specification may mean “and” or “or”. Although the terms “upper,” “lower,” “between,” etc., may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application. Although “first” or “second,” etc., are used in this specification to denote certain features, they are merely indicative of function and not as a limitation on the number or importance of specific features.

[0021] like Figure 1 As shown, this application embodiment provides an automotive emergency jump starter, including: an energy storage unit M100, equipped with a charging interface and a discharging interface; a charging / discharging connector M200, the first end of which is connected to the discharging interface of the energy storage unit M100 via a first switch K1, and the second end of which is configured to connect to an external device; and a charging voltage regulating circuit M300, the input end of which is connected to the second end of the charging / discharging connector M200 via a second switch K2, and the output end of which is connected to the charging interface of the energy storage unit M100. The charging voltage regulating circuit M300 is configured to regulate the voltage input to the charging / discharging connector M200 to a preset charging voltage. The energy storage unit M100 is, for example, a rechargeable unit such as a battery pack, battery array, or supercapacitor. The first switch K1 is used to control the on / off state of the current path from the first end of the charging / discharging connector M200 to the discharging interface of the energy storage unit M100. The second switch K2 is used to control the on / off state of the current path from the second terminal of the charging / discharging connector M200 to the input terminal of the charging voltage regulation circuit M300.

[0022] By adopting this application, the charging and discharging connector M200 can directly discharge to external devices or charge the energy storage unit M100 through external devices. During discharge, it can jump-start the car battery for emergency starting. During charging, it can replenish the energy storage unit M100. The charging voltage regulation circuit M300 protects the energy storage unit M100 to prevent damage during charging. This improves the convenience and safety of charging the energy storage unit M100, broadens the charging methods of car emergency jump starters, reduces the occurrence of under-powered or depleted emergency jump starters, meets the emergency starting needs in different scenarios, improves practicality, and meets the growing market demand.

[0023] Figure 2 A schematic diagram illustrating the application of an embodiment of this application's automotive emergency jump starter is shown. In this embodiment, the energy storage unit includes a battery pack. The emergency jump starter includes a main body with an internal cavity for housing the battery pack. Contacts are provided inside the cavity for connecting the battery pack's polarity terminals. A cover is provided on the upper part of the cavity for dust and water protection. An ejector structure is also provided inside the cavity for easy removal of the battery pack. The emergency jump starter may also include an ignition output terminal and a generator output terminal, which are connected to the vehicle's ignition system or battery via cables.

[0024] The charging / discharging connector serves as the output clip of the emergency jump starter. This clip can function as both a discharge port for discharging external devices and a charging port for charging via external devices. In this embodiment, by utilizing the output clip of the emergency jump starter as the output port, combined with an additional charging voltage regulation circuit, multiple charging methods can be compatible or switched. The battery pack can be charged using the existing DC input port, USB-A port, or Type-C port of the automotive emergency jump starter, or it can be charged using the output clip. External devices connected to the output clip include external batteries, car engines, AC power supplies, and photovoltaic devices, significantly expanding the power supply options and overcoming the limitations of traditional single-mode charging, thus improving the practicality of the emergency jump starter. The first and second switches control the on / off of the current path for discharging externally through the charging / discharging connector and the current path for charging the internal battery pack, enabling free switching between the discharging and charging circuits. This eliminates the need for complex cable connections, improving operational convenience and reducing safety hazards, avoiding potential accidents associated with traditional charging methods.

[0025] In this embodiment, the charging voltage regulation circuit includes an input filtering unit and a DC-DC conversion circuit. The second end of the charging / discharging connector is connected to the input end of the DC-DC conversion circuit through the input filtering unit, and the output end of the DC-DC conversion circuit is connected to the charging interface of the energy storage unit. The input filtering unit may include, for example, a filtering circuit composed of capacitors, inductors, etc., to filter out external interference and smooth voltage fluctuations. The DC-DC conversion circuit may employ, for example, a buck converter, a boost converter, or a buck-boost converter, to convert the input voltage into a preset charging voltage. This preset charging voltage can be determined based on the performance of the battery pack, i.e., a safe voltage that meets the requirements for stable charging of the battery pack. When the external device input is AC, the charging voltage regulation circuit may also include a rectifier unit located between the input filtering unit and the second switch. The rectified pulsating DC contains strong AC ripple; the input filtering circuit can further filter out these AC ripples, making the output voltage more stable and closer to ideal constant DC.

[0026] When charging a battery pack via an external device using output clips, if the input voltage from the external device is too high, a DC-DC converter circuit can reduce it to a safe voltage for stable charging of the battery pack, ensuring safe and stable charging. For example, if the external device is a car engine, the engine's output voltage might be 13V, while the battery pack's safe voltage is 9.6V. Directly charging the battery pack via the car engine could damage it due to excessive voltage. The DC-DC converter circuit can reduce the car engine's output voltage to 9.6V before charging the battery pack.

[0027] Optionally, the emergency start-up power supply also includes a third switch. The output of the DC-DC converter unit is connected to the charging interface of the battery pack via the third switch. The third switch is used to switch the current path from the output of the DC-DC converter unit to the charging interface of the battery pack. When charging the battery pack using power supplied by an external device via the output clip, the first switch must be disconnected and the second and third switches closed. When discharging power from the battery pack to an external device via the output clip, the second and third switches must be disconnected and the first switch closed.

[0028] In this embodiment, the car emergency jump starter also includes at least one charging port, which is connected to the input terminal of the charging voltage regulation circuit. Here, "at least one charging port" refers to a charging port in the emergency jump starter other than the output clip. Figure 2As shown, in this embodiment, the at least one charging port includes three different types of charging ports: a DC input port, a USB A port, and a Type C port. The number and type of charging ports presented here are merely examples and are not intended to limit the scope of this application. In other embodiments, the corresponding charging ports can be selected and configured according to the type of application scenario and usage requirements.

[0029] In this embodiment, the car emergency jump starter includes multiple charging voltage regulation circuits, each of which includes an input filter unit and a DC-DC converter unit connected in series. Each charging port is connected to the input terminal of a corresponding input filter unit. The second end of the output clip is connected to the input terminal of at least one input filter unit via a second switch, thereby reusing the charging voltage regulation circuits of other charging ports. Here, we take the example of the second end of the output clip being connected to the input terminal of the input filter unit corresponding to the DC input interface via a second switch; however, this application is not limited to this. In different embodiments, the second end of the output clip can also be connected to the input terminal of other input filter units via a second switch, reusing the charging voltage regulation circuits of other charging ports.

[0030] In this embodiment, the automotive emergency jump starter also includes a first voltage detection unit and a control circuit. The first voltage detection unit detects the terminal voltage of the charging / discharging connector and sends the terminal voltage signal to the control circuit. The control circuit is configured to control the opening and closing of a second switch and a third switch in response to the terminal voltage signal. For example, a first threshold is set, and when the terminal voltage signal is higher than the first threshold, it is considered that the charging conditions for the battery pack are met. Then, the control circuit is configured to control the second switch to close when the terminal voltage signal is higher than the first threshold, and to control the second switch to open when the terminal voltage signal is lower than the first threshold.

[0031] In this embodiment, the vehicle emergency jump starter also includes a second voltage detection unit for detecting the charging interface voltage of the battery pack and sending the charging interface voltage signal to the control circuit. The control circuit is configured to control the opening and closing of a second switch in response to the charging interface voltage. For example, a second threshold is set. When the charging interface voltage signal is higher than the second threshold, it is considered that the battery pack is fully charged and charging needs to be stopped. Therefore, during the charging process of the battery pack, the control circuit is configured to control the second switch to open when the charging interface voltage signal is higher than the second threshold, provided that the emergency jump starter is not currently in an external discharge state. In embodiments with a third switch, the control method of the third switch can be the same as that of the second switch, or a different control method can be used.

[0032] In this application, each switch can be implemented using a controllable switch such as a switching transistor or a relay. The control circuit can be implemented using an MCU (Microcontroller Unit), which has pins for acquiring port voltage signals and charging interface voltage signals. In another embodiment, the control circuit can also be implemented using a circuit with a first comparator and a second comparator. The first comparator receives the first input port voltage signal, receives the second input a first threshold voltage signal, and its output is connected to the control terminal of the second switch. The second comparator receives the first input port voltage signal, receives the second input a second threshold voltage signal, and its output is connected to the control terminal of the second switch.

[0033] In this embodiment, the emergency start-up power supply may further include a self-locking switch button. The signal output terminal of the self-locking switch button is connected to the control circuit, which is configured to control the opening and closing of a second switch in response to the signal from the self-locking switch button. The self-locking switch button is used to manually control the opening and closing of the second switch. When the emergency start-up power supply is not in an external discharge state, when the self-locking switch button is pressed, the control circuit controls the second switch to close; when the self-locking switch button is detected to be released, the control circuit controls the second switch to open. This design combines the stability of a mechanical switch with the intelligence of an electronic switch, ensuring the simplicity and reliability of the circuit while avoiding the problem of long-term static power consumption, and also providing users with the autonomy to choose charging options. When the control circuit is implemented using an MCU, a signal detection pin for the self-locking switch button is set on the MCU, or the control circuit may also add a third comparator for comparing the signal from the self-locking switch button with a third threshold signal, the output terminal of which is connected to the control terminal of the second switch.

[0034] In other embodiments, either controlling the opening and closing of the second switch via a voltage detection unit or via a self-locking switch button can be used, or only one of these methods may be employed. In other embodiments, the second switch can also be flexibly controlled via a touchscreen, keyboard, knob, or other human-machine interface to control the operation and shutdown of the charging circuit.

[0035] In this embodiment, the emergency start-up power supply may also include a current detection unit to detect the charging current in the current path between the DC-DC conversion unit and the charging interface of the battery pack. The emergency start-up power supply may also include a power supply circuit to use the battery pack's power to supply power to the control circuit and the charging port requiring additional power. A protocol chip may also be included between the control circuit and the USB-A port to meet the usage requirements of the USB-A port.

[0036] The voltage detection unit and current detection unit can employ general-purpose voltage and current sensors, or existing voltage and current detection circuits. In this embodiment, the emergency start-up power supply also includes an alarm unit, which includes, but is not limited to, a buzzer or LED alarm light, used to issue an alarm when charging abnormalities occur. For example, the control circuit can also determine whether to issue an alarm based on the detection signals from the first voltage detection unit, the second voltage detection unit, and the current detection unit, such as issuing alarms for over / under voltage, low battery charge, or overcharge.

[0037] In this embodiment, the emergency start-up power supply also includes a heat dissipation unit and a temperature sensor. The heat dissipation unit includes a heat sink and a cooling fan, used to control the operating temperature of the emergency start-up power supply body. The temperature sensor detects the internal temperature of the emergency start-up power supply body. The heat dissipation unit can automatically adjust the fan speed according to the temperature command from the control circuit to maintain the power supply body operating within a suitable temperature range. The method by which the control circuit generates control commands based on the detected temperature and the target temperature can employ existing fan control methods.

[0038] Therefore, the car emergency jump starter of this embodiment supports switching between multiple charging methods, including standard charging ports such as USB, Type-C, and DC input. It can also be charged directly via output clips, ensuring charging compatibility and flexibility, meeting the charging needs of different car models and scenarios, and solving the problems of limited functionality, lack of versatility, and limited practicality of existing car emergency jump starters. This application, through optimized charging circuit design, achieves fast charging and efficient utilization of battery energy, significantly improving the overall performance and user satisfaction of the emergency power supply. In this embodiment, the charging voltage regulation circuit reuses the charging voltage regulation circuits of other charging ports, which helps save costs and simplify the circuit structure.

[0039] Figure 3 This is a schematic diagram illustrating the application of a car emergency jump starter according to another embodiment of this application. In this embodiment, the charging voltage regulation circuit for charging the battery pack via the charging / discharging connector does not reuse the charging voltage regulation circuits of other charging ports, but instead uses a separate charging voltage regulation circuit. This method can further improve the individual reliability of charging from different charging ports. In this embodiment, the charging voltage regulation circuit connected to the output clip includes an input filtering unit and a DC-DC conversion unit, but this application is not limited to these. The charging voltage regulation circuits of other charging ports each include an input filtering unit and a DC-DC conversion unit, which are connected to the charging interface of the battery pack via a third switch. The charging voltage regulation circuit corresponding to the charging / discharging connector can be directly connected to the charging interface of the battery pack, or it can be connected to the charging interface of the battery pack via another switch.

[0040] Figure 4 This is a schematic diagram illustrating the application of a car emergency jump starter according to another embodiment of this application. In this embodiment, the charging voltage regulation circuit includes an energy buffer unit. The input terminal of the energy buffer unit is connected to the charging / discharging connector via a second switch, and the output terminal of the energy buffer unit is connected to the charging interface of the energy storage unit via a third switch. The energy buffer unit can be implemented using supercapacitors, small-capacity batteries, etc., and is used to store and buffer the electrical energy input to the charging / discharging connector, thereby preventing excessively high energy or current spikes during power cut-in at the input port. The opening and closing of the second and third switches are controlled by a control circuit. When the transient energy of the externally input electrical energy is too high, the second switch is closed and the third switch is opened. The energy buffer unit absorbs the transient energy, and then the third switch is opened again to gradually supply power to the battery pack. This avoids the peak damage to the battery charging caused by transient high energy and can quickly store the energy of the external clamp wire.

[0041] Figure 5 This is a schematic diagram illustrating the application of an automotive emergency jump starter according to another embodiment of this application. In this embodiment, the charging voltage regulation circuit includes an energy buffer unit and a DC-DC conversion circuit. The input terminal of the energy buffer unit is connected to the charging / discharging connector via a second switch, and the output terminal of the energy buffer unit is connected to the charging interface of the energy storage unit via the DC-DC conversion circuit and a third switch. The energy buffer unit can reduce excessively high external input voltage to a certain extent. If the reduced voltage may still damage the battery pack, the DC-DC conversion circuit further reduces the voltage to meet the requirements for safe and stable charging of the battery pack. For example, if the voltage input from an external device is 13V, the energy buffer unit reduces the voltage to 11V, and the DC-DC conversion circuit can further reduce it to 9.6V. The values ​​listed in this application are merely examples; the specific voltage values ​​and ranges vary depending on the type and size of the battery pack and the type of external device, and this application does not impose any limitations on them.

[0042] In another embodiment, a current limiting unit can also be provided after the energy buffer unit. That is, the charging voltage regulation circuit includes an energy buffer unit and a current limiting unit. The input terminal of the energy buffer unit is connected to the charging and discharging connector through a second switch, and the output terminal of the energy buffer unit is connected to the charging interface of the energy storage unit through the current limiting unit and a third switch in sequence.

[0043] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A car emergency jump starter, characterized in that, include: The energy storage unit is equipped with a charging interface and a discharging interface; A charging and discharging connector, wherein the first end of the charging and discharging connector is connected to the discharge interface of the energy storage unit via a first switch, and the second end of the charging and discharging connector is configured to connect to an external device; A charging voltage regulation circuit is provided, wherein the input terminal of the charging voltage regulation circuit is connected to the second terminal of the charging and discharging connector via a second switch, and the output terminal of the charging voltage regulation circuit is connected to the charging interface of the energy storage unit. The charging voltage regulation circuit is configured to adjust the voltage input to the charging and discharging connector to a preset charging voltage.

2. The automotive emergency jump starter according to claim 1, characterized in that, The charging voltage regulation circuit includes an input filtering unit and a DC-DC conversion circuit. The second end of the charging and discharging connector is connected to the input end of the DC-DC conversion circuit through the input filtering unit, and the output end of the DC-DC conversion circuit is connected to the charging interface of the energy storage unit.

3. The automotive emergency jump starter according to claim 1, characterized in that, It also includes a third switch, the output of which is connected to the charging interface of the energy storage unit.

4. The automotive emergency jump starter according to claim 3, characterized in that, The charging voltage regulation circuit includes an energy buffer unit, which is connected to the charging interface of the energy storage unit via the third switch.

5. The automotive emergency jump starter according to claim 3, characterized in that, The charging voltage regulation circuit includes an energy buffer unit and a DC-DC conversion circuit. The output of the energy buffer unit is connected to the charging interface of the energy storage unit in sequence through the DC-DC conversion circuit and the third switch.

6. The automotive emergency jump starter according to claim 3, characterized in that, The charging voltage regulation circuit includes an energy buffer unit and a current limiting unit. The output terminal of the energy buffer unit is connected to the charging interface of the energy storage unit in sequence through the current limiting unit and the third switch.

7. The automotive emergency jump starter according to claim 1, characterized in that, It also includes a charging port, which is connected to the input terminal of the charging voltage regulation circuit.

8. The automotive emergency jump starter according to claim 7, characterized in that, It includes multiple types of charging ports and multiple charging voltage regulation circuits. Each charging port is connected to the input terminal of a corresponding charging voltage regulation circuit. The second terminal of the charging and discharging connector is connected to the input terminal of at least one charging voltage regulation circuit through the second switch.

9. The automotive emergency jump starter according to claim 1, characterized in that, It also includes a self-locking switch button and a control circuit, wherein the signal output terminal of the self-locking switch button is connected to the control circuit, and the control circuit is configured to control the opening and closing of the second switch in response to the signal of the self-locking switch button.

10. The automotive emergency jump starter according to claim 1, characterized in that, It also includes a voltage detection unit and a control circuit. The voltage detection unit is used to detect the terminal voltage of the charging and discharging connector and send the terminal voltage signal to the control circuit. The control circuit is configured to control the opening and closing of the second switch in response to the terminal voltage signal.

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