Charging system for electric vehicle and electric vehicle

Abstract

The embodiment of the utility model discloses a charging system for an electric vehicle and the electric vehicle, when the electric vehicle is charged, a transmitting module can generate a first alternating current in a transmitting coil, and a receiving module generates a corresponding second alternating current in a receiving coil based on the first alternating current; and the second alternating current is processed to obtain direct current to charge the battery. The receiving coil is of a hollow structure, the hollow structure is used for containing the transmitting coil, on one hand, when the electric vehicle is charged, the transmitting coil is convenient to insert and take and has no polarity requirement, the charging convenience is improved, and the user experience is improved. And on the other hand, the hollow structure serving as the charging port has no voltage, so that the personal safety during charging is ensured, and the charging safety and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging, in particular to a charging system for an electric vehicle and an electric vehicle. Background Art

[0002] Electric bicycles are widely used because of their distinctive features of being green, environmentally friendly, economical and convenient.

[0003] The existing charging method of electric bicycles is usually a wired charging method. When charging the electric bicycle, the charger needs to be inserted into the charging port of the battery.

[0004] However, when performing wired charging, the battery charging port has voltage, which poses a certain threat to personal safety; and there are polarity requirements when inserting the charger into the battery charging port, which is inconvenient to operate and affects the user experience. Utility Model Content

[0005] The utility model provides a charging system for an electric vehicle and an electric vehicle, so as to realize wireless charging of the electric vehicle, improve charging safety and reliability, and enhance user experience.

[0006] According to one aspect of the utility model, there is provided a charging system for an electric vehicle, comprising: a transmitting module, a receiving module and a battery;

[0007] The transmitting module includes a transmitting coil, which is used to generate a first alternating current in the transmitting coil according to the connected power supply voltage; the receiving module includes a receiving coil, which is electrically connected to the battery and is used to generate a second alternating current in the receiving coil based on the first alternating current, and convert the second alternating current into a direct current to charge the battery; the receiving coil is arranged on the body of the electric vehicle; the receiving coil is a hollow structure, and the hollow structure is used to place the transmitting coil.

[0008] Optionally, the receiving coil is located under the handlebars of the electric vehicle.

[0009] Optionally, the transmitting coil is detachable.

[0010] Optionally, the charging system for an electric vehicle further includes a protective shell, which is located on the body of the electric vehicle, and the receiving coil is arranged in the protective shell.

[0011] Optionally, the protective shell includes a protective cover on the top of the receiving coil, and the protective cover can be opened and closed.

[0012] Optionally, at least one opening is provided at the bottom of the protective shell.

[0013] Optionally, the receiving coil is provided with sector-shaped teeth.

[0014] Optionally, the transmitting module further includes a first rectifier circuit, a power factor correction boost circuit, an inverter circuit and a resonance compensation circuit;

[0015] The input end of the first rectifier circuit is connected to the power supply voltage, and the first rectifier circuit is used to obtain a first DC voltage after rectifying the power supply voltage, and output the first DC voltage to the power factor correction boost circuit;

[0016] The power factor correction boost circuit is electrically connected to the first rectifier circuit, and is used to boost the first DC voltage and perform power factor correction on the input current, and then output a second DC voltage to the inverter circuit;

[0017] The inverter circuit is electrically connected to the power factor correction boost circuit and is used to invert the second DC voltage and then output a square wave voltage;

[0018] The resonance compensation circuit is electrically connected to the inverter circuit and the transmitting coil respectively, and is used for resonating and making the transmitting coil generate a first alternating current under the resonance effect.

[0019] Optionally, the receiving module further includes a resonant capacitor, a second rectifier circuit and a filter circuit;

[0020] The resonant capacitor is electrically connected to the receiving coil and is used to make the receiving coil resonate with the transmitting coil at the same frequency;

[0021] The second rectifier circuit is electrically connected to the receiving coil and the resonant capacitor respectively, and is used to convert the second alternating current into a pulsating direct current;

[0022] The filter circuit is electrically connected to the second rectifier circuit and the battery respectively, and is used for filtering the pulsating direct current into a direct current with a fixed voltage.

[0023] According to another aspect of the present invention, an electric vehicle is provided, comprising a charging system for an electric vehicle according to any embodiment of the present invention.

[0024] In the charging system for electric vehicles of the embodiment of the utility model, when charging the electric vehicle, the transmitting module can generate a first alternating current in the transmitting coil, and the receiving module can generate a corresponding second alternating current in the receiving coil based on the first alternating current, and process the second alternating current to obtain a direct current to charge the battery. The receiving coil is a hollow structure, and the hollow structure is used to place the transmitting coil. On the one hand, when charging the electric vehicle, the transmitting coil is easy to plug in and out, and there is no polarity requirement, which improves the convenience of charging and is conducive to improving the user experience. On the other hand, there is no voltage at the hollow structure as the charging port, which ensures personal safety during charging and improves charging safety and reliability.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of a charging system for an electric vehicle provided by an embodiment of the utility model;

[0028] Figure 2 It is a side view of a charging system for an electric vehicle provided by an embodiment of the utility model;

[0029] Figure 3 It is a schematic diagram of the connection structure of the transmitting module, the receiving module and the battery provided in the embodiment of the utility model;

[0030] Figure 4 It is a schematic diagram of a partially disassembled structure of a charging system for an electric vehicle provided by an embodiment of the utility model;

[0031] Figure 5 It is a schematic diagram of the circuit structure of a transmitting module provided by an embodiment of the utility model;

[0032] Figure 6 It is a circuit structure diagram of a receiving module provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the term "comprising" and any variation thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Figure 1 This is a schematic diagram of the overall structure of a charging system for an electric vehicle provided by an embodiment of the utility model. Figure 2 is a side view of a charging system for an electric vehicle provided by an embodiment of the utility model, referring to Figure 1 and Figure 2 The charging system for an electric vehicle includes: a transmitting module 100, a receiving module 200 and a battery 300; the transmitting module 100 includes a transmitting coil 110, and the transmitting module 100 is used to generate a first alternating current in the transmitting coil 110 according to the connected power supply voltage; the receiving module 200 includes a receiving coil 210, and the receiving module 200 is electrically connected to the battery 300, and is used to generate a second alternating current in the receiving coil 210 based on the first alternating current, and convert the second alternating current into a direct current to charge the battery 300; the receiving coil 210 is arranged on the body of the electric vehicle; the receiving coil 210 is a hollow structure, and the hollow structure is used to place the transmitting coil 110.

[0036] The power supply voltage received by the transmitting module 100 may be a mains voltage, for example, a 220V AC input voltage. The transmitting module 100 may process the power supply voltage to generate a first AC current in the transmitting coil 110. Optionally, the transmitting module 100 may include a transmitting circuit 120, which may process the power supply voltage so that a first AC current is generated in the transmitting coil 110. When charging the electric vehicle, the receiving coil 210 and the transmitting coil 110 are mutually coupled, so that a corresponding second AC current is generated in the receiving coil 210. The receiving module 200 may further include a receiving circuit 220, which may process the second AC current to obtain a DC current, and output the DC current to the battery 300 to charge the battery 300.

[0037] In the embodiment of the utility model, the receiving coil 210 is arranged on the body of the electric vehicle, and optionally, the receiving coil 210 is installed on the body of the electric vehicle. In some optional embodiments of the utility model, the receiving coil 210 is detachably installed on the body of the electric vehicle; in other optional embodiments of the utility model, the receiving coil 210 is not detachable. The receiving coil 210 is a hollow structure, and the transmitting coil 110 is placed in the hollow structure. Exemplarily, when the electric vehicle needs to be charged, the transmitting coil 110 can be directly placed in the hollow structure of the receiving coil 210, which is convenient to insert and remove when placed, has no polarity requirements, improves the convenience of charging, and is conducive to improving the user experience. In addition, in this embodiment, the wireless charging of the electric vehicle is realized by the mutual inductance coupling of the transmitting coil 110 and the receiving coil 210, providing a reliable environmental field for the charging of the electric vehicle, non-contact, no wear, no charging electrode block, and improves the service life. There is no voltage at the hollow structure as the charging port, which ensures personal safety during charging and improves charging safety.

[0038] In the charging system for electric vehicles of this embodiment, when charging the electric vehicle, the transmitting module can generate a first alternating current in the transmitting coil, and the receiving module can generate a corresponding second alternating current in the receiving coil based on the first alternating current, and process the second alternating current to obtain a direct current to charge the battery. The receiving coil is a hollow structure, and the hollow structure is used to place the transmitting coil. On the one hand, when charging the electric vehicle, the transmitting coil is easy to plug in and out, and there is no polarity requirement, which improves the convenience of charging and is conducive to improving the user experience. On the other hand, there is no voltage at the hollow structure as the charging port, which ensures personal safety during charging and improves charging safety and reliability.

[0039] Continue to refer Figure 1 and Figure 2 , based on the above technical solution, optionally, the receiving coil 210 is located under the handlebar 400 of the electric vehicle.

[0040] Specifically, the receiving coil 210 is located below the handlebar 400, which is on the back side of the front enclosure 500. On the one hand, it can be protected by the front enclosure 500 and is not easily splashed with mud and water from the front during driving; on the other hand, it is also at a certain distance from the rear seat, which is convenient for taking and placing the transmitting coil 110.

[0041] Figure 3: This is a schematic diagram of the connection structure of the transmitting module, the receiving module and the battery provided by the embodiment of the utility model. As described in the above embodiment, when charging the electric vehicle, the transmitting coil 110 can be placed in the hollow structure of the receiving coil 210. When the electric vehicle is not charged, the transmitting coil 110 can be taken out from the hollow interface, that is, the transmitting coil 110 is detachable. In this way, when the electric vehicle is not charged, the hollow structure of the receiving coil 210 can be used as a storage slot to store the rider's personal belongings, such as a water cup, a charger and a mobile phone, etc., thereby improving the practicality of the receiving coil 210.

[0042] It should be noted that in other optional embodiments of the present invention, the receiving coil 210 can also be set at other positions, such as under the seat, etc. The coil magnetic circuit and structure can be optimized according to the needs of the specific vehicle model, and the transmitting coil 110 and the receiving coil 210 can be customized in size.

[0043] Figure 4 This is a schematic diagram of a partially disassembled structure of a charging system for an electric vehicle provided by an embodiment of the utility model, with reference to Figure 3 and Figure 4 Optionally, the charging system for an electric vehicle further includes a protective shell 600 , the protective shell 600 is located on the body of the electric vehicle, and the receiving coil 210 is disposed in the protective shell 600 .

[0044] By arranging the receiving coil 210 in the protective housing 600 , the receiving coil 210 can be prevented from being damaged due to collisions, etc., and rain, snow, dust, etc. can be prevented from entering the receiving coil 210 , thereby ensuring the reliability of the receiving coil 210 .

[0045] Continue to refer Figure 3 and Figure 4 Optionally, the protective housing 600 includes a protective cover 610 on the top of the receiving coil 210, and the protective cover can be opened and closed. In this way, when the electric vehicle needs to be charged, the protective cover 610 can be opened and the transmitting coil 110 can be placed in the hollow structure of the receiving coil 210; when the electric vehicle does not need to be charged, the protective cover 610 can be closed to prevent rain and snow from entering the receiving coil 210.

[0046] On the basis of the above embodiment, optionally, at least one opening is provided at the bottom of the protective shell 600. In this way, rainwater or foreign matter that accidentally enters the protective shell 600 can be discharged in time, further ensuring the reliability of the operation of the receiving coil 210. In an optional embodiment of the utility model, the opening at the bottom of the protective shell 600 can be a conical hole; in other optional embodiments of the utility model, the opening at the bottom of the protective shell 600 can also be other shapes, which is not specifically limited in this embodiment. In other optional embodiments of the utility model, the protective shell 600 only includes a protective cover 610, which is installed on the top of the receiving coil 210, the bottom surface of the receiving coil 210 is closed, the bottom surface of the receiving coil 210 is opposite to the protective cover 610, and an opening is provided on the bottom surface of the receiving coil 210.

[0047] In some optional embodiments of the present invention, the receiving coil 210 is provided with sector-shaped teeth, so that the heat generated during the working process can be promptly discharged, thereby improving the heat dissipation performance of the receiving coil 210.

[0048] Figure 5 This is a schematic diagram of the circuit structure of a transmitting module provided by an embodiment of the utility model, with reference to Figure 1-Figure 5 Optionally, the transmitting module also includes a transmitting circuit 120, which includes a first rectifier circuit 121, a power factor correction boost circuit 122, an inverter circuit 123 and a resonance compensation circuit 124; the input end of the first rectifier circuit 121 is connected to the power supply voltage, and the first rectifier circuit 121 is used to obtain a first DC voltage after rectifying the power supply voltage, and output the first DC voltage to the power factor correction boost circuit 122; the power factor correction boost circuit 122 is electrically connected to the first rectifier circuit 121, and is used to boost the first DC voltage and perform power factor correction on the input current, and then output a second DC voltage to the inverter circuit 123; the inverter circuit 123 is electrically connected to the power factor correction boost circuit 122, and is used to invert the second DC voltage and output a square wave voltage; the resonance compensation circuit 124 is electrically connected to the inverter circuit 123 and the transmitting coil 110 respectively, and is used to resonate and enable the transmitting coil 110 to generate a first AC current under the action of resonance.

[0049] Among them, the first rectifier circuit 121 may include a half-wave rectifier circuit, a full-wave rectifier circuit or a bridge rectifier circuit. Exemplarily, when the power supply voltage is an AC voltage of 220V, it can be rectified into a first DC voltage of 330V by the first rectifier circuit 121. The power factor correction circuit can boost the first DC voltage, for example, boost the first DC voltage of 330V to a second DC voltage of 400V. The power factor correction circuit can also perform power factor correction on the input current. The inverter circuit 123 can be a full-bridge inverter circuit 123, and the inverter circuit 123 can invert the second DC voltage into a square wave voltage. Exemplarily, the second DC voltage of 400V can be inverted into a square wave voltage of positive and negative 400V. The resonance compensation circuit 124 is used to resonate and make the transmitting coil 110 resonate. Due to the resonance, the transmitting coil 110 will generate a first AC current. Exemplarily, the resonance compensation circuit 124 may include an LC resonance circuit.

[0050] Figure 6 This is a schematic diagram of the circuit structure of a transmitting module provided by an embodiment of the utility model, with reference to Figure 1-Figure 4 and Figure 6 Optionally, the receiving module also includes a receiving circuit 220, and the receiving circuit 220 includes a resonant capacitor 221, a second rectifier circuit 222 and a filter circuit 223; the resonant capacitor 221 is electrically connected to the receiving coil 210, and is used to make the receiving coil 210 resonate with the transmitting coil 110 at the same frequency; the second rectifier circuit 222 is electrically connected to the receiving coil 210 and the resonant capacitor 221, respectively, and is used to convert the second alternating current into a pulsating direct current; the filter circuit 223 is electrically connected to the second rectifier circuit 222 and the battery 300, respectively, and is used to filter the pulsating direct current into a direct current with a fixed voltage.

[0051] Specifically, the receiving coil 210 converts the magnetic field into current based on the mutual inductive coupling with the transmitting coil 110, that is, the receiving coil 210 generates a second alternating current based on the first alternating current. The receiving circuit 220 is electrically connected to the receiving coil 210. By setting the parameters of the resonant capacitor 221 in the receiving circuit 220, the receiving coil 210 and the transmitting coil 110 resonate at the same frequency to reduce losses. The second rectifier circuit 222 can be a full-bridge rectifier circuit, which can convert the second direct current into a pulsating direct current. The filter circuit 223 can filter the pulsation into a stable direct current, and the current size of the stable direct current is fixed to ensure the stability and reliability of the charging of the electric vehicle.

[0052] The present invention also provides an electric vehicle, which includes the electric vehicle charging system of any of the above embodiments of the present invention, and has the beneficial effects of the electric vehicle charging system of any of the above embodiments of the present invention, which will not be described in detail. Optionally, the electric vehicle may be an electric bicycle.

[0053] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0054] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A charging system for an electric vehicle, characterized in that: include: Transmitter module, receiver module and battery; The transmitting module includes a transmitting coil, which is used to generate a first alternating current in the transmitting coil according to the connected power supply voltage; the receiving module includes a receiving coil, which is electrically connected to the battery and is used to generate a second alternating current in the receiving coil based on the first alternating current, and convert the second alternating current into a direct current to charge the battery; the receiving coil is arranged on the body of the electric vehicle; the receiving coil is a hollow structure, and the hollow structure is used to place the transmitting coil.

2. The charging system for electric vehicles according to claim 1, characterized in that: The receiving coil is located below the handlebar of the electric vehicle.

3. The charging system for an electric vehicle according to claim 1, characterized in that: The transmitting coil is detachable.

4. The charging system for an electric vehicle according to claim 1, characterized in that: It also includes a protective shell, which is located on the body of the electric vehicle, and the receiving coil is arranged in the protective shell.

5. The charging system for electric vehicles according to claim 4, characterized in that: The protective shell includes a protective cover on the top of the receiving coil, and the protective cover can be opened and closed.

6. The charging system for electric vehicles according to claim 4, characterized in that: The bottom of the protective shell is provided with at least one opening.

7. The charging system for an electric vehicle according to claim 1, characterized in that: The receiving coil is provided with sector-shaped teeth.

8. The charging system for an electric vehicle according to any one of claims 1 to 7, characterized in that: The transmitting module also includes a first rectifier circuit, a power factor correction boost circuit, an inverter circuit and a resonance compensation circuit; The input end of the first rectifier circuit is connected to the power supply voltage, and the first rectifier circuit is used to rectify the power supply voltage to obtain a first DC voltage, and output the first DC voltage to the power factor correction boost circuit; The power factor correction boost circuit is electrically connected to the first rectifier circuit, and is used to boost the first DC voltage and perform power factor correction on the input current, and then output a second DC voltage to the inverter circuit; The inverter circuit is electrically connected to the power factor correction boost circuit, and is used to invert the second DC voltage and then output a square wave voltage; The resonance compensation circuit is electrically connected to the inverter circuit and the transmitting coil respectively, and is used for resonating and making the transmitting coil generate the first alternating current under the resonance.

9. The charging system for an electric vehicle according to any one of claims 1 to 7, characterized in that: The receiving module also includes a resonant capacitor, a second rectifier circuit and a filter circuit; The resonant capacitor is electrically connected to the receiving coil, and is used to make the receiving coil resonate with the transmitting coil at the same frequency; The second rectifier circuit is electrically connected to the receiving coil and the resonant capacitor respectively, and is used to convert the second alternating current into a pulsating direct current; The filtering circuit is electrically connected to the second rectifier circuit and the battery respectively, and is used to filter the pulsating direct current into a direct current with a fixed voltage.

10. An electric vehicle, characterized in that: A charging system for an electric vehicle comprising the charging system according to any one of claims 1 to 9.

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