Dual-power-supply switching circuit and dual-power-supply electric vehicle

Abstract

The utility model relates to the technical field of electric vehicles, and discloses a dual-power-supply switching circuit and a dual-power-supply electric vehicle. The dual-power-supply switching circuit comprises a first battery pack, a second battery pack, a first switching circuit, a driving motor and a charging circuit; the first battery pack and the second battery pack are coupled to the first switching circuit; the first switching circuit is coupled to the driving motor and used for controlling switching between the first battery pack and the second battery pack; the charging circuit is coupled to the first battery pack and the second battery pack and used for charging the second battery pack by the first battery pack. The problem that in the using process of an electric vehicle in the prior art, if the electric energy of a battery of the electric vehicle is insufficient, no emergency power supply exists in the electric vehicle, and when the battery is insufficient, a rider cannot be reminded that the electric vehicle cannot arrive at a destination or a battery replacement place can be effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a dual-power switching circuit and a dual-power electric vehicle. Background Art

[0002] Electric vehicles are divided into AC electric vehicles and DC electric vehicles. Electric vehicles are usually referred to as vehicles that use batteries as energy sources, convert electrical energy into mechanical energy movement through controllers, motors and other components, and change speed by controlling the current size. Electric vehicles do not account for a very high share of the national economy, but they comply with the energy-saving and environmental protection trends stipulated by the state, greatly facilitate short-distance transportation, and most importantly, play an important role in the national economy by saving and protecting energy and the environment.

[0003] In the prior art, when an electric vehicle is in use and the battery is low on power, there is no emergency power supply in the electric vehicle and the rider cannot be reminded when the battery is low, so the electric vehicle cannot reach the destination or the battery replacement site. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a dual power switching circuit and a dual power electric vehicle, which can effectively solve the problem in the prior art that when the electric vehicle is in use, if the electric vehicle battery is insufficient, there is no emergency power supply in the electric vehicle, and the rider cannot be reminded when the battery is insufficient, and the electric vehicle cannot reach the destination or the battery replacement site.

[0005] In a first aspect, an embodiment of the present application provides a dual power switching circuit, including: a first battery pack, a second battery pack, a first switching circuit, a drive motor, and a charging circuit;

[0006] The first battery pack and the second battery pack are both coupled to the first switching circuit;

[0007] The first switching circuit is coupled to the driving motor and is used to control the switching between the first battery pack and the second battery pack;

[0008] The charging circuit is coupled to the first battery pack and the second battery pack, and is used for the first battery pack to charge the second battery pack.

[0009] In some embodiments, the first switching circuit is connected to the driving motor via a motor control circuit.

[0010] In some embodiments, the dual power switching circuit further includes a first detection circuit for detecting status information of the first battery pack;

[0011] One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the first switching circuit. When the status information reaches a preset condition, the first detection circuit controls the first switching circuit to switch.

[0012] In some embodiments, the state information includes current and voltage.

[0013] In some embodiments, the first switching circuit includes a first switch and a second switch;

[0014] The first battery pack is connected to the motor control circuit via the first switch; the second battery pack is connected to the motor control circuit via the second switch.

[0015] In some embodiments, the dual power switching circuit further includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack;

[0016] One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller;

[0017] The MCU microcontroller is connected to the first switching circuit.

[0018] In some embodiments, the dual power switching circuit further includes a first motor control circuit, a second motor control circuit, and a second switching circuit for controlling switching between the first motor control circuit and the second motor control circuit;

[0019] The first switching circuit is connected to the second switching circuit;

[0020] One end of the first motor control circuit is connected to the second switching circuit, and the other end of the first motor control circuit is connected to the driving motor;

[0021] One end of the second motor control circuit is connected to the second switching circuit, and the other end of the second motor control circuit is connected to the driving motor.

[0022] In some embodiments, the dual power switching circuit includes a first detection circuit for detecting status information of the first battery pack;

[0023] One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the first switching circuit.

[0024] In some embodiments, the dual power switching circuit further includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack;

[0025] One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller;

[0026] The MCU microcontroller is connected to the first switching circuit.

[0027] In some embodiments, the dual power switching circuit further includes a second detection circuit;

[0028] One end of the second detection circuit is connected to the first switching circuit, and is used to detect the connection state of the first switching circuit;

[0029] Another end of the second detection circuit is connected to the second switching circuit.

[0030] In some embodiments, the dual power switching circuit includes a first detection circuit for detecting status information of the first battery pack;

[0031] One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the first switching circuit.

[0032] In some embodiments, the dual power switching circuit further includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack;

[0033] One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller;

[0034] The MCU microcontroller is connected to the first switching circuit.

[0035] In some embodiments, the dual power switching circuit further includes an MCU microcontroller, a first detection circuit for detecting status information of the first battery pack, and a second detection circuit;

[0036] One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller;

[0037] The MCU microcontroller is connected to the first switching circuit;

[0038] One end of the second detection circuit is connected to the first switching circuit for detecting the connection state of the first switching circuit, and another end of the second detection circuit is connected to the MCU microcontroller;

[0039] The second switching circuit is connected to the MCU microcontroller.

[0040] In some embodiments, the first battery pack voltage is different from the second battery pack voltage.

[0041] In some embodiments, the rated voltage of the first battery pack is 48V; the rated voltage of the second battery pack is 60V.

[0042] In some embodiments, the charging circuit includes a DC / DC module; the first battery pack and the second battery pack are both connected to the DC / DC module.

[0043] In some embodiments, the second switching circuit includes a third switch and a fourth switch;

[0044] The first switching circuit is connected to the first motor control circuit through the third switch; the first switching circuit is connected to the second motor control circuit through the fourth switch.

[0045] In a second aspect, an embodiment of the present application provides a dual-power electric vehicle, comprising: a vehicle body and the dual-power switching circuit described above;

[0046] The vehicle body has a receiving cavity; the first battery pack and the second battery pack are arranged in the receiving cavity.

[0047] In some embodiments, it includes: the accommodating cavity includes a first accommodating cavity and a second accommodating cavity; the first battery pack is placed in the first accommodating cavity, and the second battery pack is placed in the second accommodating cavity.

[0048] In some embodiments, the first battery pack and the second battery pack are both detachably connected to the vehicle body.

[0049] The embodiments of the present application have the following beneficial effects: the embodiments of the present application realize the switching between the first battery pack and the second battery pack through the first battery pack, the second battery pack and the first switching circuit, which can avoid the situation that when one battery pack fails, the normal operation of the device is affected. Furthermore, the present application sets a charging circuit between the first battery pack and the second battery pack, which can realize the function of the first battery pack charging the second battery pack in real time or on demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A first circuit schematic diagram of a dual power switching circuit according to an embodiment of the present application is shown;

[0052] Figure 2 A second circuit schematic diagram of the dual power switching circuit according to an embodiment of the present application is shown;

[0053] Figure 3 A third circuit schematic diagram of the dual power switching circuit of an embodiment of the present application is shown;

[0054] Figure 4 A fourth circuit schematic diagram of the dual power switching circuit of an embodiment of the present application is shown;

[0055] Figure 5 A fifth circuit schematic diagram of the dual power switching circuit of an embodiment of the present application is shown;

[0056] Figure 6 A sixth circuit diagram of the dual power switching circuit of an embodiment of the present application is shown;

[0057] Figure 7 A seventh circuit diagram of the dual power switching circuit of an embodiment of the present application is shown;

[0058] Figure 8 An eighth circuit schematic diagram of the dual power switching circuit of an embodiment of the present application is shown;

[0059] Fig. 9 A schematic structural diagram of a dual-power electric vehicle according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0061] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0062] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0063] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0064] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0065] The dual power switching circuit is described below in conjunction with some specific embodiments.

[0066] Example 1

[0067] Figure 1 A circuit diagram of a dual power switching circuit of Embodiment 1 of the present application is shown. Exemplarily, the dual power switching circuit includes: a first battery pack, a second battery pack, a first switching circuit, a driving motor and a charging circuit.

[0068] Among them, one of the first battery pack and the second battery pack is a main battery pack, and the other is an auxiliary battery pack. In order to facilitate the explanation of the dual power switching circuit of the present application, the first battery pack is taken as the main battery pack and the second battery pack is taken as the auxiliary battery pack. In the present application, the main battery pack is usually a more commonly used battery pack, and the auxiliary battery pack is used as a power supply device when the main battery pack is abnormal (including but not limited to the main battery pack being out of power and insufficient to drive the electric vehicle, the main battery pack being damaged and unable to drive the electric vehicle, etc.).

[0069] Furthermore, the first battery pack and the second battery pack are both coupled to a first switching circuit; the first switching circuit is coupled to a drive motor and is used to control switching between the first battery pack and the second battery pack by manual or automatic switching.

[0070] The charging circuit is coupled to the first battery group and the second battery group, and is used for the first battery group to charge the second battery group. Under the control of the charging circuit, the first battery group can charge the second battery group in real time, or charge the second battery group when the voltage of the second battery group is lower than a preset value, and not charge the second battery group when the second battery group reaches a preset value. In some examples, the charging circuit has a voltage monitoring function, and monitors the voltage of the second battery group. When the voltage of the second battery group is lower than a preset value of 51.5V, the charging circuit controls the first battery group to charge the second battery group. When the voltage of the second battery group is higher than a preset value of 53.6V, the charging circuit controls the first battery group not to charge the second battery group.

[0071] Furthermore, the voltages of the first battery pack and the second battery pack may be the same or different. The voltages of the first battery pack and the second battery pack may be determined according to their applications. For example, the switching circuit of the present application is applied to electric vehicles. The power supply requirements for electric vehicles may vary from region to region. Some regions restrict the use of a power supply with a rated voltage of 48V, some regions restrict the use of a power supply with a rated voltage of 60V, and some regions have no restrictions. Therefore, the voltages of the first battery pack and the second battery pack in the present application need to be set according to the requirements of different regions.

[0072] Preferably, since electric vehicles in most regions use a power supply with a voltage of 48V or 60V, the first battery pack and the second battery pack are usually one with a rated voltage of 48V and one with a rated voltage of 60V, which can meet the requirements of electric vehicles in most regions.

[0073] Furthermore, the first switching circuit is connected to the driving motor through a motor control circuit.

[0074] The embodiment of the present application proposes a dual power switching circuit, which realizes the switching between the first battery pack and the second battery pack through the first battery pack, the second battery pack and the first switching circuit, and can avoid the situation that when the main battery pack is abnormal, the normal operation of the device is affected. Furthermore, the present application sets a charging circuit between the first battery pack and the second battery pack, which can realize the first battery pack to charge the second battery pack in real time or on demand.

[0075] Example 2

[0076] On the basis of Example 1, Figure 1 As shown, the first switching circuit of this embodiment includes a first switch and a second switch. The first switch and the second switch can be two independent switches or single-pole double-throw switches.

[0077] The first battery pack is connected to the motor control circuit via a first switch; the second battery pack is connected to the motor control circuit via a second switch. Figure 1As shown, when the first switching circuit is switched to the first switch, the first battery pack is connected to the drive motor, thereby enabling the first battery pack to be used as a power supply battery pack. When the first switching circuit is switched to the second switch, the second battery pack is connected to the drive motor, thereby enabling the second battery pack to be used as a power supply battery.

[0078] Example 3

[0079] On the basis of Example 1, Figure 2 As shown, the dual power switching circuit also includes a first detection circuit for detecting status information of the first battery pack; one end of the first detection circuit is connected to the first battery pack; and another end of the first detection circuit is connected to the first switching circuit.

[0080] The state information includes at least one or both of current and voltage.

[0081] In this embodiment, the first detection circuit detects the status information of the first battery pack in real time or at a fixed time when in use. If the status information meets the preset condition, the first switching circuit is controlled to switch to connect to the second battery pack so that the second battery pack starts to supply power, that is, when the first detection circuit detects that the status information does not meet the preset condition, the first switch of the first switching circuit is controlled to fluctuate to the second switch, wherein the first switch and the second switch can be relays, MOSFETs, etc. In some examples, the preset condition is set to the voltage of the first battery pack being less than 54V, and when the first detection circuit detects that the voltage of the first battery pack is less than 54V, the first switch of the first switching circuit is controlled to be toggled to the second switch. In some examples, the preset condition is set to the current output by the first battery pack being greater than 14.5A, and the current duration is greater than 1S, and when the first detection circuit detects that the current output by the first battery pack is greater than 14.5A, and the current duration is greater than 1S, the first switch of the first switching circuit is controlled to be toggled to the second switch.

[0082] Furthermore, in this embodiment, the first battery pack is connected to the motor control circuit via a first switch; and the second battery pack is connected to the motor control circuit via a second switch.

[0083] In the embodiment of the present application, a first detection circuit is used to detect the status information of the first battery pack, so that automatic control can be achieved.

[0084] Example 4

[0085] On the basis of Example 1, Figure 3 As shown, the dual power switching circuit of the embodiment of the present application also includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack; one end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; and the MCU microcontroller is connected to the first switching circuit.

[0086] In this embodiment, the first detection circuit detects the status information of the first battery pack in real time or periodically when in use, and then sends the detected status information to the MCU microcontroller. The MCU microcontroller generates an output signal based on the received status information, and the first switching circuit controls whether to switch the first battery pack and the second battery pack based on the output signal of the MCU microcontroller.

[0087] Example 5

[0088] On the basis of Example 1, Figure 6 As shown, the dual power switching circuit of the embodiment of the present application also includes a first motor control circuit, a second motor control circuit and a second switching circuit for controlling the switching of the first motor control circuit and the second motor control circuit; the first switching circuit is connected to the second switching circuit; one end of the first motor control circuit is connected to the second switching circuit, and the other end of the first motor control circuit is connected to the drive motor; one end of the second motor control circuit is connected to the second switching circuit, and the other end of the second motor control circuit is connected to the drive motor, and the second switching circuit is used to control the switching between the first motor control circuit and the second motor control circuit. Typically, under different power supply voltages, the same drive motor requires different motor control circuits to drive. In some examples, the first motor control circuit is powered by a first battery pack, and the second motor control circuit is powered by a second battery pack.

[0089] Example 6

[0090] On the basis of Example 5, Figure 7 As shown, the dual power switching circuit of the embodiment of the present application further includes a first detection circuit for detecting status information of the first battery pack; one end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the first switching circuit. The status information includes at least one or both of current and voltage.

[0091] In this embodiment, the first detection circuit detects the status information of the first battery pack in real time or periodically when in use. If the status information meets a preset condition, the first switching circuit is controlled to switch to connect to the second battery pack so that the second battery pack starts to supply power.

[0092] Example 7

[0093] On the basis of Example 5, Figure 8 As shown, the dual power switching circuit of this embodiment also includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack; one end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; and the MCU microcontroller is connected to the first switching circuit.

[0094] In this embodiment, similar to the embodiment, the first detection circuit detects the status information of the first battery pack in real time or periodically when in use, and then sends the detected status information to the MCU microcontroller, the MCU microcontroller generates an output signal based on the received status information, and the first switching circuit controls whether the first switching circuit switches the first battery pack and the second battery pack based on the output signal of the MCU microcontroller.

[0095] Example 8

[0096] On the basis of Example 5, Figure 4 As shown, the dual power switching circuit of this embodiment also includes a second detection circuit; one end of the second detection circuit is connected to the first switching circuit, and is used to detect the connection state of the first switching circuit; another end of the second detection circuit is connected to the second switching circuit. Specifically, the second detection circuit can detect the connection state of the first switching circuit, that is, it can detect whether it is the first battery pack or the second battery pack that is connected. If the connected first battery pack needs to be powered by the first battery pack, the second detection circuit controls the first motor control circuit to connect to the drive motor for driving. If the connected second battery pack needs to be powered by the second battery pack, the second detection circuit controls the second motor control circuit to connect to the drive motor for driving.

[0097] Example 9

[0098] Based on Example 8, the dual power switching circuit of this embodiment includes a first detection circuit for detecting status information of the first battery pack; one end of the first detection circuit is connected to the first battery pack; and another end of the first detection circuit is connected to the first switching circuit.

[0099] Among them, the first detection circuit detects the status information of the first battery pack in real time or periodically when in use, and then sends the detected status information to the MCU microcontroller. The MCU microcontroller generates an output signal based on the received status information, and the first switching circuit controls whether the first switching circuit switches the first battery pack and the second battery pack based on the output signal of the MCU microcontroller.

[0100] Example 10

[0101] On the basis of Example 8, the dual power switching circuit in this embodiment further includes an MCU microcontroller and a first detection circuit for detecting the status information of the first battery pack; one end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; and the MCU microcontroller is connected to the first switching circuit. In this embodiment, the first detection circuit detects the status information of the first battery pack in real time or at a fixed time when in use, and then sends the detected status information to the MCU microcontroller, the MCU microcontroller generates an output signal according to the received status information, and the first switching circuit controls whether the first switching circuit switches the first battery pack and the second battery pack according to the output signal of the MCU microcontroller.

[0102] Embodiment 11

[0103] On the basis of Example 5, Figure 5 As shown, the dual power switching circuit of this embodiment further includes an MCU microcontroller, a first detection circuit for detecting status information of the first battery pack, and a second detection circuit.

[0104] Furthermore, one end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; and the MCU microcontroller is connected to the first switching circuit. In this embodiment, the first detection circuit detects the status information of the first battery pack in real time or at a fixed time when in use, and then sends the detected status information to the MCU microcontroller, and the MCU microcontroller generates an output signal according to the received status information, and the first switching circuit controls whether the first switching circuit switches the first battery pack and the second battery pack according to the output signal of the MCU microcontroller. Furthermore, one end of the second detection circuit is connected to the first switching circuit; another end of the second detection circuit is connected to the MCU microcontroller; and another end of the MCU microcontroller is connected to the second switching circuit.

[0105] In this embodiment, the second detection circuit is used to detect the connection status of the first switching circuit and send the connection status to the MCU microcontroller. The MCU microcontroller sends a control signal based on the received connection status to control the second switching circuit to switch the first motor control circuit and the second motor control circuit.

[0106] Example 12

[0107] Based on Example 5, the second switching circuit includes a third switch and a fourth switch; in some examples, the first switch and the second switch can be two independent switches or single-pole double-throw switches. The first switching circuit is connected to the first motor control circuit through the third switch; the first switching circuit is connected to the second motor control circuit through the fourth switch.

[0108] It should be noted that the charging circuit in Examples 1-12 includes a DC / DC module; the first battery pack and the second battery pack are both connected to the DC / DC module.

[0109] Embodiment 13

[0110] This application proposes a dual-power electric vehicle, such as Fig. 9 As shown, the electric vehicle includes a vehicle body and the dual power switching circuit in Examples 1-12, and a receiving cavity is opened in the vehicle body; the first battery pack and the second battery pack are arranged in the receiving cavity.

[0111] Furthermore, the accommodating cavity includes a first accommodating cavity and a second accommodating cavity; the first battery pack is placed in the first accommodating cavity, and the second battery pack is placed in the second accommodating cavity; and a charging circuit is arranged between the first battery pack and the second battery pack.

[0112] Furthermore, the first battery pack and the second battery pack are both detachably connected to the vehicle body.

[0113] Furthermore, the second switching circuit switches the third switch and the fourth switch through the handlebars of the electric vehicle, that is, the electric vehicle can switch the first motor control circuit and the second motor control circuit manually by switching the third switch and the fourth switch.

[0114] Specifically, the MCU microcontroller can be arranged in the accommodating cavity; the first battery pack and the second battery pack are both electrically connected to the MCU microcontroller. In this embodiment, the electric vehicle is powered by the first battery pack when in use, and the second battery pack is used to provide emergency power to the electric vehicle. The first battery pack charges the second battery pack through the provided charging circuit. In order to ensure that the second battery pack can be charged at any time, a DC / DC module is added to the charging circuit, so that the second battery pack can be charged at any time. When an abnormality occurs in the power supply of the first battery pack, the second battery pack can be switched to power the electric vehicle, thereby allowing the electric vehicle to continue to travel. Even when the electric vehicle is not being ridden, the DC / DC module is provided in the charging circuit, so that the second battery pack can continue to be charged.

[0115] Furthermore, when charging the second battery pack, the first battery pack supplies power while charging the second battery pack, the first battery pack inputs electrical energy to the DC / DC module, and the DC / DC module enters the second battery pack under the control of the BMS control circuit.

[0116] Furthermore, when the second battery pack supplies power to the electric vehicle, the second battery pack supplies power to the drive motor through the control of the BMS control circuit, thereby driving the electric vehicle.

[0117] Furthermore, the electric vehicle is provided with a reminder device, which can remind the owner to switch the power supply battery pack in time when the first battery pack has an abnormality. Since the switching circuit used by the electric vehicle also includes automatic switching, when the owner fails to switch in time or the detection circuit detects that the first battery pack has an abnormality for other reasons, it automatically controls the switching of the power supply battery pack.

[0118] It should be noted that the specific types of vehicle body 1, accommodating cavity 2, first battery pack 3, charging circuit and second battery pack 4 to be used are selected by relevant technicians familiar with the field and will not be described in detail here.

[0119] When the electric vehicle of the present application is in use, the main battery pack (first battery pack) provides the electric energy required for the operation of the vehicle body 1, and at the same time charges the auxiliary battery pack (second battery pack) through the charging circuit. When the electric energy provided by the first battery pack is insufficient, the connection between the first battery pack and the motor of the vehicle body 1 is disconnected, and the second battery pack provides energy for the motor operation of the vehicle body 1; by using the dual power switching circuit of the present application, when the electric vehicle is insufficient in power during use, the second battery pack provides emergency power for the vehicle body 1, and reminds the rider when the power is insufficient, so that the vehicle body 1 can reach the destination or the battery replacement site.

[0120] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A dual power switching circuit, characterized in that: include: A first battery pack, a second battery pack, a first switching circuit, a drive motor and a charging circuit; The first battery pack and the second battery pack are both coupled to the first switching circuit; The first switching circuit is coupled to the driving motor and is used to control the switching between the first battery pack and the second battery pack; The charging circuit is coupled to the first battery pack and the second battery pack, and is used for the first battery pack to charge the second battery pack.

2. The dual power switching circuit according to claim 1, characterized in that: The first switching circuit is connected to the driving motor through a motor control circuit.

3. The dual power switching circuit according to claim 2, characterized in that: The dual power switching circuit further comprises a first detection circuit for detecting status information of the first battery pack; One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the first switching circuit. When the status information reaches a preset condition, the first detection circuit controls the first switching circuit to switch.

4. The dual power switching circuit according to claim 3, characterized in that: The status information includes current and voltage.

5. The dual power switching circuit according to claim 2, characterized in that: The first switching circuit includes a first switch and a second switch; The first battery pack is connected to the motor control circuit via the first switch; the second battery pack is connected to the motor control circuit via the second switch.

6. The dual power switching circuit according to claim 2, characterized in that: The dual power switching circuit also includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack; One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; The MCU microcontroller is connected to the first switching circuit.

7. The dual power switching circuit according to claim 1, characterized in that: The dual power switching circuit further includes a first motor control circuit, a second motor control circuit and a second switching circuit for controlling switching between the first motor control circuit and the second motor control circuit; The first switching circuit is connected to the second switching circuit; One end of the first motor control circuit is connected to the second switching circuit, and the other end of the first motor control circuit is connected to the driving motor; One end of the second motor control circuit is connected to the second switching circuit, and the other end of the second motor control circuit is connected to the driving motor.

8. The dual power switching circuit according to claim 7, characterized in that: The dual power switching circuit includes a first detection circuit for detecting status information of the first battery pack; One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the first switching circuit.

9. The dual power switching circuit according to claim 7, characterized in that: The dual power switching circuit also includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack; One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; The MCU microcontroller is connected to the first switching circuit.

10. The dual power switching circuit according to claim 7, characterized in that: The dual power switching circuit also includes a second detection circuit; One end of the second detection circuit is connected to the first switching circuit, and is used to detect the connection state of the first switching circuit; Another end of the second detection circuit is connected to the second switching circuit.

11. The dual power switching circuit according to claim 10, characterized in that: The dual power switching circuit includes a first detection circuit for detecting status information of the first battery pack; One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the first switching circuit.

12. The dual power switching circuit according to claim 10, characterized in that: The dual power switching circuit also includes an MCU microcontroller and a first detection circuit for detecting status information of the first battery pack; One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; The MCU microcontroller is connected to the first switching circuit.

13. The dual power switching circuit according to claim 7, characterized in that: The dual power switching circuit also includes an MCU microcontroller, a first detection circuit for detecting the status information of the first battery pack, and a second detection circuit; One end of the first detection circuit is connected to the first battery pack; another end of the first detection circuit is connected to the MCU microcontroller; The MCU microcontroller is connected to the first switching circuit, One end of the second detection circuit is connected to the first switching circuit for detecting the connection state of the first switching circuit, and another end of the second detection circuit is connected to the MCU microcontroller. The second switching circuit is connected to the MCU microcontroller.

14. The dual power switching circuit according to claim 1, characterized in that: The first battery pack voltage is different from the second battery pack voltage.

15. The dual power switching circuit according to claim 14, characterized in that: The rated voltage of the first battery pack is 48V; the rated voltage of the second battery pack is 60V.

16. The dual power switching circuit according to claim 1, characterized in that: The charging circuit includes a DC / DC module; the first battery pack and the second battery pack are both connected to the DC / DC module.

17. The dual power switching circuit according to claim 7, characterized in that: The second switching circuit includes a third switch and a fourth switch; The first switching circuit is connected to the first motor control circuit through the third switch; the first switching circuit is connected to the second motor control circuit through the fourth switch.

18. A dual-power electric vehicle, characterized in that: include: A vehicle body and a dual power switching circuit as described in any one of claims 1 to 17; The vehicle body has a receiving cavity; the first battery pack and the second battery pack are arranged in the receiving cavity.

19. The dual-power electric vehicle according to claim 18, characterized in that: include: The accommodating cavity includes a first accommodating cavity and a second accommodating cavity; the first battery pack is placed in the first accommodating cavity, and the second battery pack is placed in the second accommodating cavity.

20. The dual-power electric vehicle according to claim 18, characterized in that: The first battery pack and the second battery pack are both detachably connected to the vehicle body.

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