Backup power supply and vehicle

Abstract

The invention relates to a backup power supply and a vehicle, the backup power supply comprises a main circuit, the main circuit is provided with a first positive electrode end and a first negative electrode end, the first positive electrode end is used for electrically connecting a positive electrode of an external power supply and a positive electrode of electric equipment, and the first negative electrode end is used for electrically connecting a negative electrode of the external power supply and a negative electrode of the electric equipment; the current limiting circuit is provided with a first connecting end and a second connecting end, and the first connecting end is used for being electrically connected with the positive electrode of the external power supply; the storage circuit is connected with the second connecting end, the storage circuit and the current limiting circuit are connected in series to form a charging and discharging circuit, the charging and discharging circuit and the main circuit are connected in parallel, the storage circuit is used for obtaining electric energy of the external power supply for charging, and under the condition that the external power supply circuit is disconnected, the storage circuit is connected with the storage circuit. And the charging and discharging circuit supplies power to the electric equipment.

Description

Technical Field

[0001] This application relates to the technical field of backup power supplies, and particularly to backup power supplies and vehicles. Background Art

[0002] Existing in-vehicle electronic devices (such as engine control units, vehicle sensors, infotainment systems, etc.) usually directly use the starting battery pack on the vehicle chassis or the starting battery pack of the generator set as the power supply. The main design purpose of such battery packs is to provide instantaneous large current for engine starting and to be charged by the generator during vehicle operation. However, during the engine starting process, the battery pack needs to release a current of up to several hundred amperes within a very short time to meet the power demand of the starter. This process will cause an instantaneous large drop in the output voltage of the battery pack, for example, dropping suddenly from the nominal 12V to 6V or even lower, far exceeding the minimum operating voltage requirements of most in-vehicle devices (usually 9V or higher).

[0003] In the prior art, for devices using the starting battery pack on the vehicle chassis or the starting battery pack of the generator set as the power supply, when the engine starts, since the battery pack releases a large current instantaneously, the voltage of the battery pack drops significantly, exceeding the minimum power supply voltage requirements of the device, resulting in the device losing power and restarting, affecting the normal use of the vehicle. Summary of the Invention

[0004] To solve or partially solve the problems existing in the related art, this application provides a backup power supply and a vehicle, which can solve the technical problem that when the engine starts, due to the large current released by the battery pack instantaneously, the voltage of the battery pack drops significantly, exceeding the minimum power supply voltage requirements of the device, resulting in the device losing power and restarting, affecting the normal use of the vehicle.

[0005] In the first aspect of this application, a backup power supply is provided. The backup power supply includes:

[0006] A main circuit having a first positive terminal and a first negative terminal. The first positive terminal is used for electrically connecting the positive electrode of an external power supply and the positive electrode of an electrical device, and the first negative terminal is used for electrically connecting the negative electrode of the external power supply and the negative electrode of the electrical device;

[0007] A current limiting circuit having a first connection end and a second connection end. The first connection end is used for electrically connecting the positive electrode of the external power supply;

[0008] A storage circuit is connected to the second connection end. The storage circuit and the current limiting circuit are connected in series to form a charge-discharge circuit. The charge-discharge circuit is connected in parallel with the main circuit. The storage circuit is used to obtain electrical energy from the external power supply for charging, and in the case of the external power circuit being open, the charge-discharge circuit supplies power to the electrical device.

[0009] In some embodiments of the present application, it further includes:

[0010] A first one-way conduction component, having a first end and a second end, the first end being electrically connected to the second connection end, and the second end being electrically connected to the first positive electrode end;

[0011] Wherein, the first one-way conduction component is used to block the current flowing from the second end to the first end, so that the electric energy of the external power supply is charged into the storage circuit through the current limiting circuit.

[0012] In some embodiments of the present application, it further includes:

[0013] A second one-way conduction component, having a third end and a fourth end, the third end being connected to the positive electrode of the external power supply, and the fourth end being connected to the first positive electrode end and the first connection end;

[0014] Wherein, the second one-way conduction component is used to block the current flowing from the fourth end to the third end.

[0015] In some embodiments of the present application, the storage circuit includes:

[0016] A capacitor component, connected to the second connection end, the storage circuit and the current limiting circuit are connected in series to form a charge and discharge circuit, the charge and discharge circuit is connected in parallel with the main circuit, the capacitor component is used to obtain the electric energy of the external power supply for charging, and in the case where the external power supply circuit is open, the charge and discharge circuit supplies power to the electrical equipment.

[0017] In some embodiments of the present application, the storage circuit further includes:

[0018] A balancing component, connected in parallel with the capacitor component, for balancing the charging and discharging of the capacitor component.

[0019] In some embodiments of the present application, the capacitor component includes:

[0020] A first capacitor, one end of which is electrically connected to the second connection end;

[0021] A second capacitor, one end of which is electrically connected to the other end of the first capacitor;

[0022] A third capacitor, one end of which is electrically connected to the other end of the second capacitor, and the other end of the third capacitor is electrically connected to the negative electrode of the electrical equipment.

[0023] In some embodiments of the present application, the balancing component includes:

[0024] A first resistor, connected in parallel with the first capacitor;

[0025] A second resistor, connected in parallel with the second capacitor;

[0026] A third resistor, connected in parallel with the third capacitor, and the first resistor, the second resistor and the third resistor are connected in series in sequence.

[0027] In some embodiments of the present application, the current limiting circuit includes:

[0028] A fourth resistor, with the first connection end being one end of the fourth resistor and the second connection end being the other end of the fourth resistor.

[0029] In some embodiments of the present application, the first unidirectional conduction component includes:

[0030] A first diode, with the first end being the anode of the first diode and the second end being the cathode of the first diode.

[0031] The second aspect of the present application provides a vehicle, including:

[0032] A backup power supply as described in any one of the above embodiments;

[0033] An external power supply, with the first positive terminal of the backup power supply electrically connected to the positive pole of the external power supply, the first negative terminal of the backup power supply electrically connected to the negative pole of the external power supply, and the first connection end of the backup power supply electrically connected to the positive pole of the external power supply;

[0034] An electrical device, with the first positive terminal of the backup power supply electrically connected to the positive pole of the electrical device and the first negative terminal of the backup power supply electrically connected to the negative pole of the electrical device.

[0035] The technical solution provided by the present application may include the following beneficial effects:

[0036] The backup power supply and the vehicle of the present application. The backup power supply includes a main circuit, a current limiting circuit and a storage circuit. Among them, the main circuit has a first positive terminal and a first negative terminal. The first positive terminal is used to electrically connect to the positive pole of the external power supply and the positive pole of the electrical device. The first negative terminal is used to electrically connect to the negative pole of the external power supply and the negative pole of the electrical device. The current limiting circuit has a first connection end and a second connection end. The first connection end is used to electrically connect to the positive pole of the external power supply. The storage circuit is connected to the second connection end. The storage circuit and the current limiting circuit are connected in series to form a charge-discharge circuit. The charge-discharge circuit is connected in parallel with the main circuit. The storage circuit is used to obtain the electrical energy of the external power supply for charging. And in the case of the external power supply being open-circuited, the charge-discharge circuit supplies power to the electrical device.

[0037] Under normal circumstances, the external power supply provides electrical energy to the electrical equipment through the main circuit. The external power supply circuit transports and stores the electrical energy on the storage circuit after the current-limiting circuit. At this time, the current-limiting circuit and the storage circuit form a charge-discharge circuit, and the external power supply circuit charges the storage circuit. At this time, the storage circuit stores the electrical energy provided by the external power supply circuit. When the engine starts, since the battery pack discharges a large current instantaneously, which causes a large drop in the voltage of the battery pack, exceeding the requirement of the minimum power supply voltage of the equipment, the external power supply is short-circuited and the electrical equipment is powered off. At this time, the main circuit is in an open state, and the storage circuit transports electrical energy to the electrical equipment through the stored electrical energy. The storage circuit realizes the function of the backup power supply, powers the electrical equipment, enables the electrical equipment to be quickly powered on and continue to work, without causing the electrical equipment to restart, and there is no need to configure a backup battery. It is charged through the external power supply without the need for additional charging operations. Moreover, through the storage circuit, when the main circuit is powered off, the electrical equipment can be quickly powered, without the need for switching and without causing a delay problem.

[0038] The backup power supply of the present application can effectively solve the technical problem that when the engine starts, since the battery pack discharges a large current instantaneously, which causes a large drop in the voltage of the battery pack, exceeding the requirement of the minimum power supply voltage of the equipment, resulting in the equipment losing power and restarting, affecting the normal use of the vehicle.

[0039] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Brief Description of the Drawings

[0040] By describing the exemplary embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. Among them, in the exemplary embodiments of the present application, the same reference numerals generally represent the same components.

[0041] Figure 1 is the overall schematic diagram of the backup power supply shown in the embodiment of the present application;

[0042] Figure 2 is the circuit schematic diagram of the backup power supply shown in the embodiment of the present application.

[0043] Wherein:

[0044] V2, the first unidirectional conduction component; V1, the second unidirectional conduction component; C1, the first capacitor; C2, the second capacitor; C3, the third capacitor; R1, the first resistor; R2, the second resistor; R3, the third resistor; R0, the current-limiting circuit. Detailed Embodiments

[0045] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application will be more thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0046] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0048] Unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0049] In the related art, for a device powered by a starting battery pack on an automotive chassis or a starting battery pack of a generator set, when the engine starts, since the battery pack discharges a large current instantaneously, the voltage of the battery pack drops significantly, exceeding the minimum power supply voltage requirement of the device, causing the device to lose power and restart, affecting the normal use of the system.

[0050] Figure 1 It is a circuit schematic diagram of a backup power supply shown in an embodiment of the present application.

[0051] See Figure 1, the first aspect of the present application provides a backup power supply, including:

[0052] A main circuit having a first positive terminal and a first negative terminal, the first positive terminal being used for electrically connecting the positive electrode of an external power supply and the positive electrode of an electrical device, and the first negative terminal being used for electrically connecting the negative electrode of the external power supply and the negative electrode of the electrical device;

[0053] A current-limiting circuit R0 having a first connection end and a second connection end, the first connection end being used for electrically connecting the positive electrode of the external power supply;

[0054] A storage circuit connected to the second connection end, the storage circuit and the current-limiting circuit R0 being connected in series to form a charge-discharge circuit, the charge-discharge circuit being connected in parallel with the main circuit, the storage circuit being used for obtaining the electric energy of the external power supply for charging, and in the case where the external power supply circuit is open, the charge-discharge circuit supplies power to the electrical device.

[0055] The backup power supply of the present application includes a main circuit, a current-limiting circuit R0, and a storage circuit. Among them, the main circuit has a first positive terminal and a first negative terminal. The first positive terminal is used for electrically connecting the positive electrode of the external power supply and the positive electrode of the electrical device, and the first negative terminal is used for electrically connecting the negative electrode of the external power supply and the negative electrode of the electrical device. The current-limiting circuit R0 has a first connection end and a second connection end, and the first connection end is used for electrically connecting the positive electrode of the external power supply. The storage circuit is connected to the second connection end. The storage circuit and the current-limiting circuit R0 are connected in series to form a charge-discharge circuit. The charge-discharge circuit is connected in parallel with the main circuit. The storage circuit is used for obtaining the electric energy of the external power supply for charging, and in the case where the external power supply circuit is open, the charge-discharge circuit supplies power to the electrical device.

[0056] Under normal circumstances, the external power supply provides electric energy to the electrical device through the main circuit. The external power supply circuit delivers the electric energy to the storage circuit after the current-limiting circuit R0. At this time, the current-limiting circuit R0 and the storage circuit form a charge-discharge circuit, and the external power supply circuit charges the storage circuit. At this time, the storage circuit stores the electric energy provided by the external power supply circuit. When the engine starts, since the battery pack discharges a large current instantaneously, which causes a large drop in the voltage of the battery pack, exceeding the requirement of the minimum power supply voltage of the device, the external power supply is short-circuited and the electrical device is powered off. At this time, the main circuit is in an open state, and the storage circuit delivers the stored electric energy to the electrical device. The storage circuit realizes the function of the backup power supply, supplies power to the electrical device, enables the electrical device to be quickly powered on and continue to work, without causing the electrical device to restart, and there is no need to configure a backup battery. It is charged by the external power supply without the need for additional charging operations. Moreover, through the storage circuit, when the main circuit is powered off, the electrical device can be quickly powered, without the need for switching and without causing a delay problem.

[0057] The backup power supply of the present application can effectively solve the technical problem that when the engine starts, the battery pack discharges a large current instantaneously, resulting in a large drop in the voltage of the battery pack, exceeding the minimum power supply voltage requirement of the equipment, causing the equipment to lose power and restart, and affecting the normal use of the vehicle.

[0058] In the embodiment of the present application, the external power supply circuit is the external power supply circuit relative to the backup power supply, and it can be the battery pack inside the vehicle. The storage circuit, as an electric energy storage device, is connected in series between the external power supply and the electrical equipment.

[0059] In the embodiment of the present application, one of the application scenarios is on a vehicle, and the electrical equipment can be the motor or engine of the vehicle, etc.

[0060] When the battery pack supplies power normally, since the charge and discharge circuit is connected in parallel with the main circuit, in the charge and discharge circuit at this time, the first connection end of the current limiting circuit R0 is electrically connected to the positive electrode of the external power supply and the negative electrode of the electrical equipment, one end of the storage circuit is electrically connected to the second connection end and the negative electrode of the electrical equipment, and the other end of the storage circuit is electrically connected to the negative electrode of the electrical equipment and the negative electrode of the external power supply.

[0061] While supplying power to the electrical equipment through the main circuit, it also charges the storage circuit; when the engine starts and the voltage output by the external power supply through the main circuit drops instantaneously due to the battery pack discharging a large current instantaneously, at this time, it is equivalent to the battery pack being open-circuited, and the storage circuit can supply supplementary power to the electrical equipment so that it is not affected by the voltage change of the external power supply and can directly connect to supply power to the electrical equipment.

[0062] In this embodiment, the main circuit can be a circuit that directly connects the positive electrode of the external power supply to the positive electrode of the electrical equipment and the negative electrode of the external power supply to the negative electrode of the electrical equipment. Diodes, switch groups or resistors, etc. can be configured on the main circuit. The diode can conduct in one direction, avoiding the problem of reverse connection and protecting the power supply circuit. The switch group can disconnect the main circuit appropriately according to the voltage change situation to avoid damaging the external power supply. The resistor can limit the current to ensure that in the case of a short circuit or failure of the electrical equipment, the resistor can limit the current and avoid the problem of damage to the external power supply.

[0063] The current limiting circuit R0 can be one or more resistors, or a variable resistor, etc., and can limit the electric energy provided by the external power supply circuit to ensure that the main circuit normally delivers electric energy to the electrical equipment, and at the same time can also protect the storage circuit and avoid damage to the storage circuit caused by excessive current.

[0064] In this embodiment, the storage circuit may be one or more capacitors connected in series to form a supercapacitor bank. The supercapacitor bank can be powered by an external power supply or supply power to the electrical device when the external power supply is interrupted.

[0065] In some embodiments of the present application, it further includes:

[0066] A first unidirectional conduction component V2, having a first end and a second end, the first end being electrically connected to the second connection end, and the second end being electrically connected to the first positive extreme.

[0067] Wherein, the first unidirectional conduction component V2 is used to block the current flowing from the second end to the first end, so that the electrical energy of the external power supply is charged into the storage circuit through the current limiting circuit R0.

[0068] In the embodiment of the present application, the first unidirectional conduction component V2 is a diode. Through the unidirectional conduction characteristic of the diode, the reverse flow of current on the main circuit is blocked from entering the storage circuit, thus playing a role in blocking the direct charging of the external power supply to the storage circuit.

[0069] In some embodiments of the present application, it further includes:

[0070] A second unidirectional conduction component V1, having a third end and a fourth end, the third end being connected to the positive pole of the external power supply, and the fourth end being connected to the first positive extreme and the first connection end.

[0071] Wherein, the second unidirectional conduction component V1 is used to block the current flowing from the fourth end to the third end.

[0072] In this embodiment, the second unidirectional conduction component V1 is a diode. Among them, the third end is the anode of the diode, and the fourth end is the cathode of the diode. The current can only flow from the anode to the cathode, making the second unidirectional conduction component V1 serve as reverse connection protection of the external power supply on the main circuit and blocking the reverse power supply of the storage circuit to the external power supply, avoiding the problem that the storage circuit reversely supplies power to the external power supply and causing damage to the external power supply.

[0073] In some embodiments of the present application, the storage circuit includes:

[0074] A capacitor assembly, connected to the second connection end. The storage circuit and the current limiting circuit R0 are connected in series to form a charge-discharge circuit. The charge-discharge circuit is connected in parallel with the main circuit. The capacitor assembly is used to obtain the electrical energy of the external power supply for charging, and in the case where the external power supply circuit is interrupted, the charge-discharge circuit supplies power to the electrical device.

[0075] In this embodiment, the capacitor assembly may be composed of one or more capacitors. The capacitor assembly can store the electrical energy of the external power supply and discharge when the external power supply is cut off to supply power to the electrical equipment.

[0076] In some embodiments of the present application, the storage circuit further includes:

[0077] An equalization component, connected in parallel to the capacitor assembly, for equalizing the charging and discharging of the capacitor assembly.

[0078] In this embodiment, the equalization component may be one or more resistors connected in parallel to the capacitor assembly, and the capacitor assembly is equalized through the resistors.

[0079] During charging, the voltages on the capacitor assembly are different. When the charging voltage of one of the capacitors in the capacitor assembly is greater than its rated value, it will be damaged. The equalization component can protect the capacitor assembly from unevenness caused by the accumulation of electrical energy due to differences in its own electrical parameters during the charging and discharging processes.

[0080] In some embodiments of the present application, the capacitor assembly includes:

[0081] A first capacitor C1, one end of which is electrically connected to the second connection end;

[0082] A second capacitor C2, one end of which is electrically connected to the other end of the first capacitor C1;

[0083] A third capacitor C3, one end of which is electrically connected to the other end of the second capacitor C2, and the other end of the third capacitor C3 is electrically connected to the negative electrode of the electrical equipment.

[0084] In the embodiment of the present application, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in series in sequence, so as to form a super capacitor. Charging and discharging are performed through the super capacitor to realize the function of a backup power supply, and seamless switching can also be achieved to reduce delay.

[0085] In some embodiments of the present application, the equalization component includes:

[0086] A first resistor R1, connected in parallel to the first capacitor C1;

[0087] A second resistor R2, connected in parallel to the second capacitor C2;

[0088] A third resistor R3, connected in parallel to the third capacitor C3, and the first resistor R1, the second resistor R2, and the third resistor R3 are connected in series in sequence.

[0089] In the embodiments of the present application, the first capacitor C1 is balanced by the first resistor R1, the second capacitor C2 is balanced by the second resistor R2, and the third capacitor C3 is balanced by the third resistor R3, thereby avoiding the accumulation of electrical energy due to the differences in their own electrical parameters of the first capacitor C1, the second capacitor C2, and the third capacitor C3 during the charging and discharging processes, and preventing the imbalance from causing damage to the first capacitor C1, the second capacitor C2, or the third capacitor C3.

[0090] In some embodiments of the present application, the current limiting circuit R0 includes:

[0091] A fourth resistor, where the first connection end is one end of the fourth resistor and the second connection end is the other end of the fourth resistor.

[0092] In this embodiment, the fourth resistor can achieve the effect of current limiting, reducing the current entering the storage circuit to control the charging current of the storage circuit.

[0093] In some embodiments of the present application, the first unidirectional conduction component V2 includes:

[0094] A first diode, where the first end is the anode of the first diode and the second end is the cathode of the first diode.

[0095] In this embodiment, the current of the first diode can only flow from the anode to the cathode and cannot flow from the cathode to the anode, thereby blocking the external power supply from directly charging the storage circuit.

[0096] The second aspect of the present application provides a vehicle, including:

[0097] A backup power supply as described in any of the above embodiments;

[0098] An external power supply, where the first positive terminal of the backup power supply is electrically connected to the positive pole of the external power supply, the first negative terminal of the backup power supply is electrically connected to the negative pole of the external power supply, and the first connection end of the backup power supply is electrically connected to the positive pole of the external power supply;

[0099] An electrical device, where the first positive terminal of the backup power supply is electrically connected to the positive pole of the electrical device, and the first negative terminal of the backup power supply is electrically connected to the negative pole of the electrical device.

[0100] The backup power supply and vehicle of the present application. The backup power supply includes a main circuit, a current-limiting circuit R0, and a storage circuit. Among them, the main circuit has a first positive terminal and a first negative terminal. The first positive terminal is used for electrically connecting the positive electrode of an external power supply and the positive electrode of an electrical device, and the first negative terminal is used for electrically connecting the negative electrode of the external power supply and the negative electrode of the electrical device. The current-limiting circuit R0 has a first connection end and a second connection end. The first connection end is used for electrically connecting the positive electrode of the external power supply. The storage circuit is connected to the second connection end. The storage circuit and the current-limiting circuit R0 are connected in series to form a charge-discharge circuit. The charge-discharge circuit is connected in parallel with the main circuit. The storage circuit is used to obtain the electrical energy of the external power supply for charging. And in the case where the external power supply circuit is open, the charge-discharge circuit supplies power to the electrical device.

[0101] Under normal circumstances, the external power supply provides electrical energy to the electrical device through the main circuit. The external power supply circuit transports the electrical energy to the storage circuit after the current-limiting circuit R0. At this time, the current-limiting circuit R0 and the storage circuit form a charge-discharge circuit, and the external power supply circuit charges the storage circuit. At this time, the storage circuit stores the electrical energy provided by the external power supply circuit. When the engine starts, since the battery pack discharges a large current instantaneously, which causes a large drop in the voltage of the battery pack, exceeding the requirement of the minimum power supply voltage of the device, the external power supply is short-circuited and the electrical device is powered off. At this time, the main circuit is in an open state. The storage circuit transports electrical energy to the electrical device through the stored electrical energy. The storage circuit realizes the function of the backup power supply, supplies power to the electrical device, enables the electrical device to be quickly powered on and continue to work, without causing the electrical device to restart, and there is no need to configure a backup battery. It is charged through the external power supply without additional charging operations. Moreover, through the storage circuit, when the main circuit is powered off, the electrical device can be quickly powered, without switching and without causing a delay problem.

[0102] The backup power supply of the present application can effectively solve the technical problem that when the engine starts, since the battery pack discharges a large current instantaneously, which causes a large drop in the voltage of the battery pack, exceeding the requirement of the minimum power supply voltage of the device, resulting in the device losing power and restarting, affecting the normal use of the vehicle.

[0103] The solution of the present application has been described in detail with reference to the drawings above. In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailedly described in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also know that the actions and modules involved in the specification are not necessarily essential to the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0104] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of technologies in the market, or to enable other ordinary technical personnel in the art to understand the embodiments disclosed herein.

Claims

1. A backup power supply, characterized in that, Comprising: A main circuit having a first positive terminal and a first negative terminal. The first positive terminal is used for electrically connecting the positive electrode of an external power supply and the positive electrode of an electrical device, and the first negative terminal is used for electrically connecting the negative electrode of the external power supply and the negative electrode of the electrical device; A current-limiting circuit having a first connection end and a second connection end. The first connection end is used for electrically connecting the positive electrode of the external power supply; and A storage circuit connected to the second connection end. The storage circuit and the current-limiting circuit are connected in series to form a charge-discharge circuit. The charge-discharge circuit is connected in parallel with the main circuit. The storage circuit is used for obtaining the electric energy of the external power supply for charging, and in the case where the external power supply circuit is open, the charge-discharge circuit supplies power to the electrical device.

2. The backup power supply according to claim 1, characterized in that, Further comprising: A first one-way conduction component having a first end and a second end. The first end is electrically connected to the second connection end, and the second end is electrically connected to the first positive terminal; Wherein, the first one-way conduction component is used for blocking the current flowing from the second end to the first end, so that the electric energy of the external power supply is charged into the storage circuit through the current-limiting circuit.

3. The backup power supply according to claim 2, characterized in that, Further comprising: A second one-way conduction component having a third end and a fourth end. The third end is connected to the positive electrode of the external power supply, and the fourth end is connected to the first positive terminal and the first connection end; Wherein, the second one-way conduction component is used for blocking the current flowing from the fourth end to the third end.

4. The backup power supply according to claim 3, characterized in that, The storage circuit includes: A capacitor assembly connected to the second connection end. The storage circuit and the current-limiting circuit are connected in series to form a charge-discharge circuit. The charge-discharge circuit is connected in parallel with the main circuit. The capacitor assembly is used for obtaining the electric energy of the external power supply for charging, and in the case where the external power supply circuit is open, the charge-discharge circuit supplies power to the electrical device.

5. The backup power supply according to claim 4, characterized in that, The storage circuit further includes: An equalization component connected in parallel with the capacitor assembly for equalizing the charging and discharging of the capacitor assembly.

6. The backup power supply according to claim 5, characterized in that, The capacitor assembly includes: A first capacitor, one end of which is electrically connected to the second connection end; A second capacitor, one end of which is electrically connected to the other end of the first capacitor; A third capacitor, one end of which is electrically connected to the other end of the second capacitor, and the other end of the third capacitor is electrically connected to the negative electrode of the electrical device.

7. The backup power supply according to claim 6, characterized in that, The equalization component includes: A first resistor connected in parallel with the first capacitor; A second resistor connected in parallel with the second capacitor; A third resistor connected in parallel with the third capacitor. The first resistor, the second resistor and the third resistor are connected in series in sequence.

8. The backup power supply according to claim 7, wherein The current-limiting circuit includes: A fourth resistor, with the first connection end being one end of the fourth resistor and the second connection end being the other end of the fourth resistor.

9. The backup power supply according to claim 8, wherein The first one-way conduction component includes: A first diode, with the first end being the anode of the first diode and the second end being the cathode of the first diode.

10. A vehicle, characterized in that, Comprising: A backup power supply as described in any one of claims 1-9; An external power supply, the first positive terminal of the backup power supply is electrically connected to the positive electrode of the external power supply, the first negative terminal of the backup power supply is electrically connected to the negative electrode of the external power supply, and the first connection end of the backup power supply is electrically connected to the positive electrode of the external power supply; An electrical device, wherein the first positive terminal of the backup power source is electrically connected to the positive electrode of the electrical device, and the first negative terminal of the backup power source is electrically connected to the negative electrode of the electrical device.

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