A car charger

Abstract

The embodiment of the utility model relates to a vehicle charger. The vehicle charger comprises: a shell component with a receiving space formed inside; a Type C jack and a USB connector located outside the receiving space are arranged on the shell component; a circuit board received in the receiving space; a charging chip integrating a buck converter and a charging protocol is arranged on the circuit board, and the charging protocol is the PD protocol; a connecting terminal and a Type C connector are arranged on the circuit board; at least a part of the Type C connector is received in the receiving space; at least a part of the connecting terminal is received in the receiving space; the USB connector is connected to the vehicle power supply, and the connecting terminal is connected to the USB connector, so that a power signal is formed on the circuit board. By adding a charging chip integrating a buck converter and a charging protocol, its integration can be improved. The charging protocol is the PD protocol, which is a fast charging protocol, and therefore has a fast charging function, which can effectively improve the charging efficiency and shorten the charging time.

Description

Technical Field

[0001] The utility model relates to the technical field of chargers, and in particular to a vehicle charger for converting a USB interface to a Type C interface, which is applied between a new energy vehicle and an electronic device. Background Art

[0002] With the development of technology, owners or passengers of new energy vehicles need to charge their mobile phones and other electronic devices, and need to realize fast charging function. However, most of the charging interfaces of new mobile phones on the market are Type C (Universal Serial Bus Type-C, a connection standard for electronic devices, used for data transmission and power supply) interfaces.

[0003] In the prior art, when car owners or passengers charge electronic devices such as mobile phones on new energy vehicles, they usually use data cables to connect the on-board power supply of the new energy vehicle and electronic devices such as mobile phones; however, data cables often get tangled, are difficult to store, or easily get entangled with other objects. Especially during driving, if the data cable gets entangled with the gear lever or prevents the driver from steering the wheel, it will pose a threat to driving safety and easily cause safety accidents.

[0004] The USB (Universal Serial Bus) power port on traditional new energy vehicles does not support fast charging, resulting in a long charging time and low efficiency for mobile phones and other electronic devices. Traditional on-board chargers such as data cables do not have chip configurations, or the Buck power supply (step-down converter) and charging protocol functions are separated on different chips instead of integrated into one chip, resulting in low integration of traditional on-board chargers. Utility Model Content

[0005] The vehicle charger provided by the utility model aims to solve the technical problems of long charging time, low charging efficiency and low integration of existing vehicle chargers for charging electronic equipment on new energy vehicles.

[0006] The utility model provides a vehicle charger. The vehicle charger comprises:

[0007] A housing component; a receiving space is formed inside the housing component; a Type C jack and a USB connector with a USB interface are provided on the housing component;

[0008] circuit board; the circuit board is accommodated in the accommodation space; the USB connector is located outside the accommodation space; a charging chip is arranged on the circuit board; a buck converter and a charging protocol corresponding to the buck converter are integrated on the charging chip; the charging protocol is a PD protocol;

[0009] A connecting terminal and a Type C connector having a Type C interface; the Type C connector and the connecting terminal are arranged at two ends of the circuit board that are away from each other, and both extend in a direction away from the circuit board;

[0010] Wherein, a part of the Type C connector is accommodated in the Type C jack, and another part is accommodated in the accommodation space; at least a part of the connecting terminal is accommodated in the accommodation space;

[0011] The USB connector is connected to a vehicle-mounted power supply, and the connecting terminal is connected to the USB connector, so that a power signal is formed on the circuit board.

[0012] In some embodiments, the housing component comprises:

[0013] Mounting shell; the mounting shell comprises: a base and a retaining plate; the retaining plate cover is arranged at one end of the base; a bayonet is provided at one end of the base away from the retaining plate;

[0014] A cover body; the cover body comprises: a substrate, a hook and a positioning protrusion; the substrate has a first surface and a second surface opposite to each other; the hook and the positioning protrusion both protrude from the first surface of the substrate, and the USB connector protrudes from the second surface of the substrate;

[0015] Among them, the Type C socket is opened on the retaining plate and is interconnected with the interior of the base; the mounting shell is connected to the cover body through the mutual cooperation between the bayonet and the hook to enclose and form the receiving space.

[0016] In some embodiments, the hook comprises:

[0017] An elastic part and a snap-fitting protrusion matched with the bayonet; one end of the elastic part protrudes from the first surface of the substrate; the snap-fitting protrusion is arranged at one end of the elastic part away from the substrate;

[0018] Wherein, the elastic part has an elastic force for driving the engaging protrusion to engage with the bayonet; when the mounting shell and the cover body are connected to each other, the elastic part and the positioning protrusion are both accommodated in the accommodation space.

[0019] In some embodiments, when the elastic portion provides the elastic force, the engaging protrusion is driven to enter the bayonet to limit the mutual movement between the mounting shell and the cover body.

[0020] In some embodiments, a locking member and a guide convex bump are provided on the base; the locking member protrudes from the outer surface of the base and is located at one end of the base close to the retaining plate; the guide convex bump protrudes from the inner surface of the base toward the outer surface of the base and passes through two ends of the base that are away from each other;

[0021] The positioning protrusion is provided with a guide convex strip adapted to the guide convex bump and protruding from the surface of the positioning protrusion;

[0022] The guide convex strip can move in the guide convex bump to guide the cover body to be connected to the mounting shell.

[0023] In some embodiments, a terminal insertion hole is formed on the positioning protrusion; the terminal insertion hole penetrates the positioning protrusion and the substrate, so that the connecting terminal passes through the terminal insertion hole and is connected to the USB connector.

[0024] In some embodiments, the connection terminal comprises:

[0025] ACC terminal as power input terminal;

[0026] GND terminal as ground terminal;

[0027] The GND terminal, the ACC terminal and the USB connector cooperate with each other to form a current loop between the USB connector and the connection terminal to provide the power signal for the circuit board.

[0028] In some embodiments, the vehicle charger further comprises:

[0029] A charging protection module is provided on the circuit board; the USB connector, the connection terminal, the charging protection module, the charging chip and the Type C connector cooperate with each other to form a charging circuit;

[0030] Among them, the connecting terminals are respectively connected to the USB connector and the charging protection module, and the charging chip is respectively connected to the Type C connector and the charging protection module.

[0031] In some embodiments, the charging chip includes:

[0032] VIN pin; the VIN pin is connected to the ACC terminal through a charging protection module provided on the circuit board, so that the power signal is transmitted to the charging chip;

[0033] VOUT pin; the VOUT pin is used to respond to the power signal to form a charging output signal;

[0034] Among them, the TypeC interface is a USB TypeC interface that supports BC protocol, PD protocol, QC protocol or FCP protocol, including: a VBUS pin connected to the VOUT pin; the VBUS pin is used to respond to the charging output signal to form a charging input signal.

[0035] In some embodiments, the charging chip further includes:

[0036] The DP pin is used as a forward signal transmission end, and the DM pin is used as a reverse signal transmission end;

[0037] Wherein, the Type C interface further includes: a USB D+ pin connected to the DP pin and a USB D- pin connected to the DM pin;

[0038] The USB D+ pin, the USB D- pin, the DP pin and the DM pin cooperate with each other to form differential transmission;

[0039] Wherein, the Type C interface and the charging chip both have a CC1 pin and a CC2 pin for configuring the differential transmission to control the formation or interruption of the charging input signal.

[0040] In some embodiments, the CC1 pin and the CC2 pin provided on the charging chip and the Type C interface are connected correspondingly; the charging circuit includes:

[0041] A first ESD protection component, a second ESD protection component, a third ESD protection component and a fourth ESD protection component;

[0042] Among them, one end of the first ESD protection component is connected to the CC1 pin, and the other end is grounded; one end of the second ESD protection component is connected to the CC2 pin, and the other end is grounded; one end of the third ESD protection component is respectively connected to the DP pin of the charging chip and the USB D+ pin of the TypeC interface, and the other end is grounded; one end of the fourth ESD protection component is respectively connected to the DM pin of the charging chip and the USB D- pin of the TypeC interface, and the other end is grounded;

[0043] An anti-reverse connection diode; one end of the anti-reverse connection diode is respectively connected to the ACC terminal of the connection terminal and a part of the charging protection module, and the other end is connected to another part of the charging protection module.

[0044] In some embodiments, the charging chip includes a SW pin as a differential switch; the charging circuit further includes:

[0045] A first differential mode inductor; one end of the first differential mode inductor is connected to the SW pin, and the other end is respectively connected to the VOUT pin of the charging chip and the VBUS pin of the Type C interface;

[0046] A second differential mode inductor; one end of the second differential mode inductor is connected to the anti-reverse connection diode, and the other end is connected to the VIN pin of the charging chip.

[0047] Preferably, the electronic device to be charged is connected to the on-board power supply of the new energy vehicle through the on-board charger: the on-board power supply has a USB jack; the new energy vehicle is provided with a mounting groove corresponding to the mounting position of the on-board power supply; the USB jack is opened in the mounting groove; the inner surface of the mounting groove is provided with a locking groove adapted to the locking member of the on-board charger; the locking member and the locking groove cooperate with each other to guide the USB connector of the on-board charger to be inserted into the USB jack;

[0048] The USB connector of the on-board charger is inserted into the USB jack and connected to the on-board power supply, and a preset charging voltage is formed after being processed by a buck converter integrated on the charging chip of the on-board charger, and the preset charging voltage is transmitted to the Type C connector of the on-board charger;

[0049] In addition, the electronic device comprises: an electronic device body and a charging socket arranged on the electronic device body; the charging socket is adapted to the Type C connector of the above-mentioned on-board charger;

[0050] Finally, the USB connector of the vehicle charger is connected to the vehicle power supply, and the Type C connector is inserted into the charging socket to charge the electronic device body.

[0051] At least one beneficial effect of the vehicle charger provided by the embodiment of the utility model is: a new type of vehicle charger is proposed, and by adding a design of a charging chip, the buck converter and the charging protocol related to the buck converter are integrated on the charging chip, which can improve the integration of the vehicle charger. The charging protocol of the charging chip is the PD protocol, which is a fast charging protocol. Therefore, the vehicle charger with the charging chip has a fast charging function, which can effectively improve the charging efficiency and shorten the charging time. Connecting terminals and circuit boards are used to replace traditional external cables, and both the connecting terminals and the circuit boards can be accommodated in the accommodation space. This can effectively avoid the phenomenon of knotting, difficulty in storage or easy entanglement with other objects caused by external cables during the charging process, which provides great convenience for practical applications and reduces safety risks during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0053] Figure 1 It is a structural schematic diagram of a vehicle charger provided by an embodiment of the utility model;

[0054] Figure 2 It is a structural exploded diagram of the vehicle charger provided by the embodiment of the utility model;

[0055] Figure 3 It is a functional block diagram of the vehicle charger provided by the embodiment of the utility model;

[0056] Figure 4 It is a circuit principle diagram of a charging circuit provided by an embodiment of the utility model;

[0057] Figure 5 yes Figure 4 The charging circuit provided in the figure, and the circuit schematic diagram related to the charging chip;

[0058] Figure 6 yes Figure 4 The charging circuit provided in the invention and the circuit schematic diagram related to the charging protection module. Reference numerals: 100, on-board charger; 1, housing component; 11, mounting shell; 12, cover; 111, base; 112, retaining plate; 121, substrate; 122, hook; 123, positioning protrusion; 1111, bayonet; 1112, locking member; 1113, guide convex hull; 1121, Type C jack; 1122, first silk screen identification portion; 1123, second silk screen identification portion; 1221, elastic portion; 1222, engaging protrusion; 1231, guide convex strip; 1232, terminal jack; 2, circuit board; 3, connecting terminal; 31, ACC terminal; 32, GND terminal; 4, USB connector; 5, Type C connector; 51, Type C interface; 6, charging chip; 7, charging protection module. DETAILED DESCRIPTION

[0059] The present invention is described in detail below in conjunction with specific embodiments. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0060] It should be noted that, unless otherwise clearly specified and limited, the terms "inside", "outside", "mutually divergent", "far away", "close", "protruding", "protruding from", "towards", etc. used in this specification to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Terms such as "install", "connect", "connect", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features; thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of such features; "multiple" means two or more; and "and / or" includes any and all combinations of one or more related listed items.

[0061] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0062] In this embodiment, the specific shape, structure, size, etc. of the "on-board charger" are not limited, and those skilled in the art may selectively use any appropriate implementation method according to actual needs.

[0063] Figure 1 It is a structural schematic diagram of a vehicle charger provided by an embodiment of the utility model. Figure 2 It is a structural exploded view of the vehicle charger provided by the embodiment of the utility model. Figure 3 It is a functional block diagram of the vehicle charger provided by the embodiment of the utility model.

[0064] See also Figure 1-Figure 3 The vehicle charger 100 includes: a shell component 1, a circuit board 2, a connecting terminal 3, a USB connector 4, a Type C connector 5 and a charging chip 6.

[0065] A receiving space is formed inside the shell component 1 ; a Type C socket 1121 and a USB connector 4 having a USB interface are provided on the shell component 1 .

[0066] In addition, the circuit board 2 is accommodated in the accommodation space; the USB connector 4 is located outside the accommodation space; a charging chip 6 is provided on the circuit board 2; a buck converter (buck power supply, which is a common step-down and regulated power supply) and a charging protocol corresponding to the buck converter are integrated on the charging chip 6; the charging protocol is the PD protocol (Power Delivery, which is an open standard fast charging protocol).

[0067] In the embodiment of the present application, the charging protocol may be the PD3.0 protocol; wherein the PD3.0 protocol supports higher power transmission and can meet the fast charging requirements of different devices. In addition, the PD3.0 protocol also adds support for reverse charging, which allows the device to act as a power bank to charge other devices. Therefore, the PD3.0 protocol is widely used in fast charging of various portable devices such as mobile phones, tablet computers, and laptops.

[0068] Specifically, in a Buck power supply, when the power transistor is turned on, the current on the input power supply will be stored in the inductor, and when the power transistor is turned off, the inductor will release energy and provide output current. By controlling the duty cycle of the on-time and off-time of the power transistor, the output voltage can be adjusted, thereby achieving the function of step-down and voltage regulation.

[0069] It can be understood that the connection terminal 3 and the Type C connector 5 having the Type C interface 51 ; the Type C connector 5 and the connection terminal 3 are arranged at two ends of the circuit board 2 that are away from each other, and both extend in a direction away from the circuit board 2 .

[0070] It should be noted that a portion of the Type C connector 5 is accommodated in the Type C socket 1121 , and another portion is accommodated in the accommodation space; at least a portion of the connection terminal 3 is accommodated in the accommodation space.

[0071] Specifically, the USB connector 4 is connected to the vehicle power supply, and the connection terminal 3 is connected to the USB connector 4, so that a power signal is formed on the circuit board 2 (that is, input power is provided to the circuit board).

[0072] In some embodiments, in combination Figure 1-Figure 2 It can be seen that the housing component 1 includes a mounting shell 11 and a cover body 12 .

[0073] The mounting shell 11 includes: a base 111 and a retaining plate 112 ; the retaining plate 112 is covered on one end of the base 111 ; and a bayonet 1111 is provided at one end of the base 111 away from the retaining plate 112 .

[0074] In addition, the cover 12 includes: a substrate 121, a hook 122 and a positioning protrusion 123; the substrate 121 has a first surface and a second surface opposite to each other; the hook 122 and the positioning protrusion 123 both protrude from the first surface of the substrate 121, and the USB connector 4 protrudes from the second surface of the substrate 121;

[0075] It can be understood that the Type C socket is provided on the retaining plate 112 and is interconnected with the interior of the base 111; the mounting shell 11 is connected to the cover body 12 through the mutual cooperation between the bayonet 1111 and the hook 122 to enclose and form a receiving space.

[0076] In an embodiment of the present application, a first silk-screen identification portion 1122 and a second silk-screen identification portion 1123 are provided on the retaining plate 112; wherein the first silk-screen identification portion 1122 is provided at the circumferential edge of the Type C socket 1121; the second silk-screen identification portion 1123 is provided next to the Type C socket 1121 for displaying charging information.

[0077] In some embodiments, the hook 122 includes an elastic portion 1221 and a locking protrusion 1222.

[0078] It should be noted that the engaging protrusion 1222 is matched with the bayonet 1111 ; one end of the elastic portion 1221 protrudes from the first surface of the substrate 121 ; and the engaging protrusion 1222 is disposed at one end of the elastic portion 1221 away from the substrate 121 .

[0079] Specifically, the elastic portion 1221 has an elastic force that drives the engaging protrusion 1222 to engage with the bayonet 1111 ; when the mounting shell 11 and the cover body 12 are connected to each other, the elastic portion 1221 and the positioning protrusion 123 are both accommodated in the accommodation space.

[0080] In some embodiments, Figure 1-Figure 2 As shown, when the elastic portion 1221 provides elastic force, the engaging protrusion 1222 is driven to enter the bayonet 1111 to limit the mutual movement between the mounting shell 11 and the cover body 12 .

[0081] In some embodiments, please refer to Figure 1-Figure 2 A locking piece 1112 and a guide convex bump 1113 are provided on the base 111; the locking piece 1112 protrudes from the outer surface of the base 111 and is located at one end of the base 111 close to the retaining plate 112; the guide convex bump 1113 protrudes from the inner surface of the base 111 toward the outer surface of the base 111, and passes through the two ends of the base 111 that are away from each other.

[0082] The positioning protrusion 123 is provided with a guide protrusion 1231 adapted to the guide convex bump 1113 and protruding from the surface of the positioning protrusion 123 .

[0083] In addition, the guide protrusion 1231 can move in the guide convex bump 1113 to guide the cover body 12 to be connected to the mounting shell 11 .

[0084] In some embodiments, according to Figure 1-Figure 2 It can be seen that a terminal insertion hole 1232 is provided on the positioning protrusion 123 ; the terminal insertion hole 1232 penetrates the positioning protrusion 123 and the substrate 121 , so that the connecting terminal 3 passes through the terminal insertion hole 1232 and is connected to the USB connector 4 .

[0085] In some embodiments, see Figure 2 The connection terminal 3 includes: an ACC terminal 31 (Accessory, accessory terminal, used to connect the vehicle power supply of automotive electrical equipment) as a power input terminal and a GND terminal 32 (Ground, ground terminal, used to provide circuit grounding or ground wire connection) as a ground terminal.

[0086] Specifically, the GND terminal 32, the ACC terminal 31 and the USB connector 4 cooperate with each other to form a current loop between the USB connector 4 and the connection terminal 3 to provide a power signal for the circuit board 2 (connecting the vehicle power supply to the input end of the circuit board 2).

[0087] In some embodiments, in combination Figure 1-Figure 3 It can be seen that the vehicle charger 100 further includes: a charging protection module 7 .

[0088] It can be understood that the charging protection module 7 is arranged on the circuit board 2; the USB connector 4, the connecting terminal 3, the charging protection module 7, the charging chip 6 and the Type C connector 5 cooperate with each other to form a charging circuit.

[0089] In an embodiment of the present application, the charging protection module may be composed of EMI (Electromagnetic Interference, electromagnetic interference), FILTER (filter, an electronic device used to filter, adjust or separate signals) and TVS tube D6 (Transient Voltage Suppression diode, a transient voltage suppression diode, an electronic device used to protect circuits from transient overvoltage damage); wherein, EMI, FILTER and TVS tube D6 cooperate with each other so that the above-mentioned power supply signal can prevent electromagnetic interference and protect the circuit from transient overvoltage damage.

[0090] It should be noted that the connection terminal 3 is respectively connected to the USB connector 4 and the charging protection module 7 , and the charging chip 6 is respectively connected to the Type C connector 5 and the charging protection module 7 .

[0091] Specifically, the model of the charging chip 6 may be IP6520 and support the PD3.0 protocol.

[0092] In some embodiments, Figure 3 As shown, the charging chip 6 includes: a VIN pin (voltage input, voltage input pin) and a VOUT pin (voltage output, voltage output pin).

[0093] The VIN pin is connected to the ACC terminal 31 through the charging protection module 7 so that the power signal is transmitted to the charging chip 6 .

[0094] In addition, the VOUT pin is used to respond to the power signal to form a charging output signal.

[0095] Specifically, the Type C interface 51 is a USB Type C interface that supports the BC protocol, PD protocol, QC protocol or FCP protocol, including: a VBUS pin connected to the VOUT pin; the VBUS pin is used to respond to the charging output signal to form a charging input signal.

[0096] In some embodiments, please refer to Figure 3 The charging chip 6 also includes: a DP pin (Data Positive, which refers to the positive electrode in the differential signal pair, also known as a P pin) as a forward signal transmission end and a DM pin (Data Negative, which refers to the negative electrode in the differential signal pair, also known as an N pin) as a reverse signal transmission end.

[0097] Specifically, the DP pin and the DM pin are the positive and negative poles in differential signal transmission, respectively; the DP pin transmits a positive phase signal, and the DM pin transmits a negative phase signal; moreover, the DP pin and the DM pin usually exist in pairs, and by utilizing the differential characteristics of the signal, the anti-interference ability can be improved to reduce noise interference during the signal transmission process; in addition, differential signal transmission is a commonly used high-speed data transmission method.

[0098] It should be noted that the Type C interface 51 also includes: a USB D+ pin (Universal Serial Bus Date Plus) connected to the DP pin and a USB D- pin (Universal Serial Bus Date Minus) connected to the DM pin.

[0099] It is understandable that the USB D+ pin, the USB D- pin, the DP pin and the DM pin cooperate with each other to form differential transmission.

[0100] Moreover, both the Type C interface 51 and the charging chip 6 have a CC1 pin (Configuration Channel 1, a configuration channel) and a CC2 pin (Configuration Channel 2, a configuration channel) for configuring differential transmission to control the formation or interruption of the charging input signal; that is, the CC1 pin and the CC2 pin are used to determine the interface function and implement charging support.

[0101] Among them, the CC1 pin and CC2 pin realize the identification between devices, function expansion and switching of different working modes through different voltage and current configurations; in addition, the existence of the CC1 pin and CC2 pin enables the USB Type C interface to have more advanced and flexible application capabilities.

[0102] Figure 4 It is a circuit principle diagram of a charging circuit provided in an embodiment of the utility model. Figure 5 yes Figure 4 The charging circuit provided in the figure is the circuit schematic diagram related to the charging chip. Figure 6 yes Figure 4 The charging circuit provided in the figure is the circuit schematic diagram related to the charging protection module.

[0103] In some embodiments, see Figure 4-Figure 6 , the CC1 pin and CC2 pin on the charging chip 6 and the Type C interface 51 are connected correspondingly; the charging circuit includes: a first ESD protection component D4, a second ESD protection component D3, a third ESD protection component D1, a fourth ESD protection component D2 and an anti-reverse connection diode D5.

[0104] It should be noted that ESD (Electrostatic Discharge) is used in electronic devices to prevent and protect circuits from damage caused by electrostatic discharge.

[0105] Among them, one end of the first ESD protection component D4 is connected to the CC1 pin, and the other end is grounded; one end of the second ESD protection component D3 is connected to the CC2 pin, and the other end is grounded; one end of the third ESD protection component D1 is respectively connected to the DP pin of the charging chip 6 and the USB D+ pin of the TypeC interface 51, and the other end is grounded; one end of the fourth ESD protection component D2 is respectively connected to the DM pin of the charging chip 6 and the USB D- pin of the TypeC interface 51, and the other end is grounded;

[0106] In addition, one end of the anti-reverse connection diode D5 is respectively connected to the ACC terminal 31 of the connection terminal 3 and a part of the charging protection module 7 , and the other end is connected to another part of the charging protection module 7 .

[0107] It can be understood that the function of the reverse polarity protection diode is to prevent the power supply voltage from being mistakenly connected to the circuit in reverse; when the power supply voltage is reversely connected, the reverse polarity protection diode will play a protective role and prevent the reverse current from flowing into the circuit, thereby preventing components and circuit boards from being damaged.

[0108] In some embodiments, Figure 3-Figure 6 As shown, the charging chip 6 includes a SW pin (Switch, a pin related to a switch in a circuit) as a differential mode switch; the charging circuit also includes: a first differential mode inductor L1 and a second differential mode inductor L2.

[0109] Among them, one end of the first differential mode inductor L1 is connected to the SW pin, and the other end is connected to the VOUT pin of the charging chip 6 and the VBUS pin of the Type C interface 51 respectively.

[0110] In addition, one end of the second differential mode inductor L2 is connected to the anti-reverse connection diode, and the other end is connected to the VIN pin of the charging chip 6 .

[0111] Combination Figure 1-Figure 6 It can be seen that the electronic devices that need to be charged (for example, mobile phones, tablet computers) are connected to the on-board power supply of the new energy vehicle through the above-mentioned on-board charger 100: the on-board power supply has a USB jack; the new energy vehicle is provided with a mounting groove corresponding to the installation position of the on-board power supply; the USB jack is opened in the mounting groove; the inner surface of the mounting groove is provided with a locking groove compatible with the locking piece 1112 of the above-mentioned on-board charger; the locking piece 1112 and the locking groove cooperate with each other to guide the USB connector 4 of the on-board charger 100 to be inserted into the USB jack.

[0112] Among them, the USB connector 4 of the car charger 100 is inserted into the USB jack and connected to the vehicle power supply. After being processed by the buck converter integrated on the charging chip 6 of the car charger 100, a preset charging voltage is formed, and the preset charging voltage is transmitted to the Type C connector 5 of the car charger 100.

[0113] In addition, the electronic device includes: an electronic device body and a charging socket arranged on the electronic device body; the charging socket is compatible with the Type C connector 5 of the above-mentioned vehicle charger 100.

[0114] Finally, the USB connector 4 of the vehicle charger 100 is connected to the vehicle power supply, and the Type C connector 5 is inserted into the charging socket to charge the electronic device body.

[0115] In the embodiment of the present application, the Type C connector 5 can be a 16-pin connector; wherein the charging chip 6 can adopt a domestic chip solution, which can support 18w fast charging function, and the Buck power supply and mutual charging protocol are integrated in the same chip, which not only has a high degree of integration but also has a low cost.

[0116] In the embodiment of the present application, the surface of the vehicle charger 100 should be flat, free of bubbles, burrs, shrinkage marks, defects and deformations visible to the naked eye, and the markings should be clear; the plastic parts (for example, shell parts) of the vehicle charger 100 shall not have cracks and deformations that affect the performance and appearance, and the metal parts (for example, connection terminals) shall not be deformed or rusted.

[0117] Specifically, the operating temperature of the vehicle charger 100 is -40 to 85° C., and the storage temperature is -40 to 90° C.; its operating voltage is 9 to 16V, and the maximum output power is 18W.

[0118] Among them, the output voltage range of the car charger 100 is 3V-12V, the maximum output current is 3.0A; it supports APPLE2.4 / BC1.2 / QC2.0 / QC3.0 / FCP / PD protocols.

[0119] In addition, the vehicle charger 100 has protection functions of input overvoltage, input undervoltage, output short circuit, output overcurrent, reverse voltage protection and whole machine overtemperature protection.

[0120] In summary, the vehicle charger provided in the embodiment of the utility model can improve the integration of the vehicle charger by adding the design of the charging chip, integrating the buck converter and the charging protocol related to the buck converter on the charging chip. The charging protocol of the charging chip is the PD protocol, which is a fast charging protocol. Therefore, the vehicle charger with the charging chip has a fast charging function, which can effectively improve the charging efficiency and shorten the charging time. Connecting terminals and circuit boards are used to replace traditional external cables, and the connecting terminals and circuit boards can be accommodated in the accommodation space. This can effectively avoid the phenomenon of knotting, difficulty in storage or easy entanglement with other objects caused by external cables during the charging process, which provides great convenience for practical applications and reduces safety risks during driving. Therefore, the vehicle charger provided in the embodiment of the utility model has certain novelty compared with traditional vehicle chargers.

[0121] The above contents are further detailed descriptions of the present invention in combination with specific / preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A vehicle charger, characterized in that: include: A housing component; a receiving space is formed inside the housing component; The housing component is provided with a Type C jack and a USB connector having a USB interface; Circuit boards; The circuit board is accommodated in the accommodation space; the USB connector is located outside the accommodation space; a charging chip is arranged on the circuit board; a buck converter and a charging protocol corresponding to the buck converter are integrated on the charging chip; and the charging protocol is a PD protocol; A connecting terminal and a Type C connector having a Type C interface; the Type C connector and the connecting terminal are arranged at two ends of the circuit board that are away from each other, and both extend in a direction away from the circuit board; Wherein, a part of the Type C connector is accommodated in the Type C jack, and another part is accommodated in the accommodation space; at least a part of the connecting terminal is accommodated in the accommodation space; The USB connector is connected to a vehicle-mounted power supply, and the connecting terminal is connected to the USB connector, so that a power signal is formed on the circuit board.

2. The vehicle charger according to claim 1, characterized in that: The housing component comprises: Mounting shell; the mounting shell comprises: a base and a retaining plate; the retaining plate cover is arranged at one end of the base; a bayonet is provided at one end of the base away from the retaining plate; A cover body; the cover body comprises: a substrate, a hook and a positioning protrusion; the substrate has a first surface and a second surface opposite to each other; the hook and the positioning protrusion both protrude from the first surface of the substrate, and the USB connector protrudes from the second surface of the substrate; Among them, the Type C socket is opened on the retaining plate and is interconnected with the interior of the base; the mounting shell is connected to the cover body through the mutual cooperation between the bayonet and the hook to enclose and form the receiving space.

3. The vehicle charger according to claim 2, characterized in that: The hook comprises: An elastic part and a snap-fitting protrusion matched with the bayonet; one end of the elastic part protrudes from the first surface of the substrate; the snap-fitting protrusion is arranged at one end of the elastic part away from the substrate; Wherein, the elastic part has an elastic force to drive the engaging protrusion to engage with the bayonet; when the mounting shell and the cover body are connected to each other, the elastic part and the positioning protrusion are both accommodated in the accommodation space; When the elastic part provides the elastic force, the engaging protrusion is driven to enter the bayonet to limit the mutual movement between the mounting shell and the cover body.

4. The vehicle charger according to claim 2, characterized in that: The base is provided with a locking member and a guide convex bump; the locking member protrudes from the outer surface of the base and is located at one end of the base close to the retaining plate; the guide convex bump protrudes from the inner surface of the base toward the outer surface of the base and passes through two ends of the base that are away from each other; The positioning protrusion is provided with a guide convex strip adapted to the guide convex bump and protruding from the surface of the positioning protrusion; Wherein, the guide convex strip can move in the guide convex hull to guide the cover body to be connected to the mounting shell; Wherein, a terminal insertion hole is provided on the positioning protrusion; the terminal insertion hole penetrates the positioning protrusion and the substrate, so that the connecting terminal passes through the terminal insertion hole and is connected to the USB connector.

5. The vehicle charger according to claim 1, characterized in that: The connecting terminal comprises: ACC terminal as the power input terminal; GND terminal as ground terminal; The GND terminal, the ACC terminal and the USB connector cooperate with each other to form a current loop between the USB connector and the connection terminal to provide the power signal for the circuit board.

6. The vehicle charger according to claim 1, characterized in that: Also includes: A charging protection module is provided on the circuit board; the USB connector, the connection terminal, the charging protection module, the charging chip and the Type C connector cooperate with each other to form a charging circuit; Among them, the connecting terminals are respectively connected to the USB connector and the charging protection module, and the charging chip is respectively connected to the Type C connector and the charging protection module.

7. The vehicle charger according to claim 5, characterized in that: The charging chip comprises: VIN pin; the VIN pin is connected to the ACC terminal through a charging protection module provided on the circuit board, so that the power signal is transmitted to the charging chip; VOUT pin; the VOUT pin is used to respond to the power signal to form a charging output signal; Among them, the TypeC interface is a USB TypeC interface that supports BC protocol, PD protocol, QC protocol or FCP protocol, including: a VBUS pin connected to the VOUT pin; the VBUS pin is used to respond to the charging output signal to form a charging input signal.

8. The vehicle charger according to claim 7, characterized in that: The charging chip also includes: The DP pin is used as a forward signal transmission end, and the DM pin is used as a reverse signal transmission end; Wherein, the Type C interface further includes: a USB D+ pin connected to the DP pin and a USB D- pin connected to the DM pin; The USB D+ pin, the USB D- pin, the DP pin and the DM pin cooperate with each other to form differential transmission; Wherein, the Type C interface and the charging chip both have a CC1 pin and a CC2 pin for configuring the differential transmission to control the formation or interruption of the charging input signal.

9. The vehicle charger according to claim 6, wherein the CC1 pin and the CC2 pin on the charging chip and the Type C interface are connected correspondingly; The charging circuit comprises: A first ESD protection component, a second ESD protection component, a third ESD protection component and a fourth ESD protection component; Among them, one end of the first ESD protection component is connected to the CC1 pin, and the other end is grounded; one end of the second ESD protection component is connected to the CC2 pin, and the other end is grounded; one end of the third ESD protection component is respectively connected to the DP pin of the charging chip and the USB D+ pin of the TypeC interface, and the other end is grounded; one end of the fourth ESD protection component is respectively connected to the DM pin of the charging chip and the USB D- pin of the TypeC interface, and the other end is grounded; An anti-reverse connection diode; one end of the anti-reverse connection diode is respectively connected to the ACC terminal of the connection terminal and a part of the charging protection module, and the other end is connected to another part of the charging protection module.

10. The on-board charger according to claim 9, wherein the charging chip comprises a SW pin as a differential mode switch; The charging circuit further comprises: A first differential mode inductor; one end of the first differential mode inductor is connected to the SW pin, and the other end is respectively connected to the VOUT pin of the charging chip and the VBUS pin of the Type C interface; A second differential mode inductor; one end of the second differential mode inductor is connected to the anti-reverse connection diode, and the other end is connected to the VIN pin of the charging chip.

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