Charging standard compatible switching circuit and new energy automobile

Abstract

The utility model discloses a charging standard compatible switching circuit in the technical field of new energy automobile battery detection, and aims to solve the problem that different national standard fast charges cannot be compatible in the prior art. One end of a CC2 connecting circuit is connected with a voltage source of an electronic control unit end of a whole vehicle end, and the other end of the CC2 connecting circuit is connected with a CC2 wire harness of the whole vehicle end; one end of the CC1 connection circuit is connected with the charging standard selection circuit, and the other end of the CC1 connection circuit is connected with a CC1 wire harness of a whole vehicle end; the whole vehicle electronic control unit outputs a switch control signal to the charging standard selection circuit, and the charging standard selection circuit is used for receiving the switch control signal and closing a switch of a corresponding charging standard. According to the utility model, the corresponding controllable switches can be switched off or switched on according to different fast charging standards, and then the contact point of the selection switch S2 is selected to form a required charging detection circuit, so that the advantage of supporting different standard charging is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a charging standard compatible switching circuit and new energy automobile belong to new energy automobile battery detection technical field. BACKGROUND

[0002] In recent years, with the large use of clean energy, the new energy automobile industry has obtained the rapid development, and each car enterprise is competing for the stage, pure electricity, plug -in hybrid, and the range -extended electric vehicle is in full bloom. With the new energy automobile ratio exceeding the fuel car, the slow charging and the difficult charging problem become the great trouble of the majority of new energy car owners. The fast charging national standard on the market is also constantly updated. How to be compatible with different national standards of fast charging at the battery end is the problem to be solved at present. SUMMARY

[0003] The utility model solves the technical problem that the prior art overcomes, provides a charging standard compatible switching circuit and new energy automobile.

[0004] To solve the above technical problem, the present application is realized by adopting the following technical scheme.

[0005] Firstly, the utility model provides a charging standard compatible switching circuit, which comprises:

[0006] CC2 connecting circuit, one end of CC2 connecting circuit is connected with voltage source of whole vehicle end electronic control unit end, the other end of CC2 connecting circuit is connected with CC2 wire harness of whole vehicle end;CC2 connecting circuit is used for collecting voltage value input through CC2 wire harness and is transmitted to whole vehicle end electronic control unit end;

[0007] CC1 connecting circuit, one end of CC1 connecting circuit is connected with charging standard selection circuit, the other end of CC1 connecting circuit is connected with CC1 wire harness of whole vehicle end;CC1 connecting circuit is used for collecting voltage value input through CC1 wire harness and is transmitted to whole vehicle electronic control unit;

[0008] Whole vehicle electronic control unit exports switch control signal to charging standard selection circuit, and charging standard selection circuit is used for receiving switch control signal and closing the switch of corresponding charging standard.

[0009] The above technical scheme, through setting voltage detection point two and voltage detection point one, the voltage value of CC2 end and the voltage value of CC1 end can be detected, different fast charging standards can be selected, the corresponding controllable switch is opened and closed, then the contact point of selection switch S2 is selected, and the required charging detection circuit is formed, so that different standard charging can be supported.

[0010] Further, the CC2 connecting circuit comprises: a voltage detection point two, a third controllable switch S3 and a fourth resistor R4.

[0011] One end of the voltage detection point two is connected with the CC2 wire harness of the whole vehicle end, and the other end of the voltage detection point two is connected with the third controllable switch S3, the fourth resistor R4 and the positive electrode of the voltage source, and the negative electrode of the voltage source is grounded.

[0012] The above technical solution can determine the subsequent preparation to enter the required fast charging standard by setting the voltage detection point two to detect the voltage of the CC2 end.

[0013] Further, the CC2 connection circuit further comprises: a fifth resistor R5, one end of the fifth resistor R5 is connected with one end of the third controllable switch S3, and the other end of the fifth resistor R5 is connected with the voltage source.

[0014] The above technical solution can calculate the voltage that can be collected by the voltage detection point two through the formula U2*R5 / (R5+R4) by setting the fifth resistor R5 between the third selection switch and the fourth resistor R4 to connect the voltage source, and confirm that the CC2 connection is normal.

[0015] Further, the CC1 connection circuit comprises: a voltage detection point one, a first controllable switch S1 and a first resistor R1.

[0016] One end of the CC1 wire harness of the whole vehicle end is connected with one end of the voltage detection point one, and the other end of the voltage detection point one is connected with one end of the first controllable switch S1 and a charging standard selection circuit, and the other end of the first controllable switch S1 is connected with the first resistor R1 and then grounded.

[0017] The above technical solution can calculate the voltage value of the voltage detection point one by setting the first controllable switch S1 and the first resistor R1 to form a voltage dividing circuit when the selection switch S2 is connected with different resistance values.

[0018] Further, the CC1 connection circuit further comprises: a diode D1.

[0019] The CC1 wire harness of the whole vehicle end is connected with the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected with one end of the voltage detection point one.

[0020] The above technical solution adds the diode D1 when the CC1 wire harness of the whole vehicle end is connected, which plays a role of voltage stabilization.

[0021] Further, the charging standard selection circuit comprises: a selection switch S2, a second resistor R2 and a third resistor R3.

[0022] The selection switch S2 includes a common contact point, a first contact point, a disconnected contact point and a second contact point, the common contact point is connected with the other end of the voltage detection point one, the first contact point is connected with the second resistor R2 and then grounded, the second contact point is connected with the third resistor R3 and then grounded, and the disconnected contact point is suspended.

[0023] The above technical scheme can adapt to different fast charging standards by setting the selection switch S2 in cooperation with corresponding resistors.

[0024] Further, the anti-reverse circuit comprises a TVS tube, one end of the TVS tube is connected with the other end of the voltage detection point one, and the other end of the TVS tube is connected with the common contact point of the selection switch S2.

[0025] The above technical scheme can prevent reverse connection from affecting the circuit as long as the voltage is below -14V by setting the TVS tube (transient voltage suppressor).

[0026] Further, the anti-reverse and filtering circuit comprises a differential mode inductor LD and a TVS tube.

[0027] The other end of the voltage detection point one is connected with one end of the differential mode inductor LD and one end of the TVS tube respectively, the other end of the TVS tube is connected with the common contact point of the selection switch S2, and the other end of the differential mode inductor LD is grounded.

[0028] The above technical scheme adds the differential mode inductor LD to the TVS tube to suppress interference and ensure the purity and stability of signals.

[0029] Further, the anti-reverse and filtering circuit comprises a differential mode inductor LD, a TVS tube, a first capacitor C1 and a second capacitor C2.

[0030] The other end of the voltage detection point one is connected with one end of the differential mode inductor LD, one end of the TVS tube and one end of the first capacitor C1 respectively, the other end of the TVS tube is connected with one end of the second capacitor C2 and the common contact point of the selection switch S2 respectively, and the other end of the differential mode inductor LD, the other end of the first capacitor C1 and the other end of the second capacitor C2 are grounded respectively.

[0031] The above technical scheme adds the first capacitor C1 and the second capacitor C2 to the TVS tube and the differential mode inductor LD and grounds them, thereby protecting the front and rear circuits and playing a filtering role.

[0032] In a second aspect, the utility model also provides a new energy automobile, including the charging standard compatible switching circuit of first aspect.

[0033] The technical scheme has the beneficial effects that: the charging standard compatible switching circuit is added in the new energy automobile, so that the new energy automobile can adapt to different fast charging standards and meet the fast charging diversity of the new energy automobile.

[0034] The utility model discloses the beneficial effects reached:

[0035] First, the voltage value of CC2 end and the voltage value of CC1 end can be detected through the setting of voltage detection point two and voltage detection point one, different fast charging standards can be adapted to, the corresponding controllable switch is disconnected or closed, then the contact point of selection switch S2 is selected, and the required charging detection circuit is formed, so that different standard charging can be supported.

[0036] Second, the charging standard compatible switching circuit is added in the new energy automobile, so that the new energy automobile can adapt to different fast charging standards and meet the fast charging diversity of the new energy automobile. DRAWINGS

[0037] Figure 1 It is a compatible switching circuit circuit schematic diagram of the utility model;

[0038] Figure 2 It is another compatible switching circuit circuit schematic diagram of the utility model.

[0039] In the drawing: 0-disconnection contact point; 1-first contact point; 2-second contact point; 3-voltage detection point one; 4-voltage detection point two. CONCRETE IMPLEMENTATION

[0040] The utility model will be further described below in combination with the drawings.The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0041] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.Thus, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features.In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0042] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model through specific circumstances.

[0043] Embodiment 1, as shown in the embodiment, a charging standard compatible switching circuit is provided, comprising: Figure 1

[0044] CC2 connection circuit, one end of the CC2 connection circuit is connected with 12V voltage source U2 of vehicle end electronic control unit end, the other end of the CC2 connection circuit is connected with CC2 wire harness of vehicle end, the CC2 connection circuit is used to collect voltage value input through CC2 wire harness and transmit to vehicle end electronic control unit end, and CC2 wire harness is vehicle end charging connection confirmation line;

[0045] CC1 connection circuit, one end of the CC1 connection circuit is connected with charging standard selection circuit, the other end of the CC1 connection circuit is connected with CC1 wire harness of vehicle end, the CC1 connection circuit is used to collect voltage value input through CC1 wire harness and transmit to vehicle electronic control unit (ECU), and CC1 wire harness is charging pile end charging connection confirmation line;

[0046] The vehicle electronic control unit outputs switch control signal to the charging standard selection circuit, and the charging standard selection circuit is used to receive the switch control signal and close the switch of the corresponding charging standard.

[0047] The CC2 connection circuit includes voltage detection point two 4, third controllable switch S3 and fourth resistor R4.

[0048] One end of the voltage detection point two 4 is connected with CC2 wire harness of vehicle end, the other end of the voltage detection point two 4 is connected with third controllable switch S3, fourth resistor R4 and the positive electrode of the voltage source, and the negative electrode of the voltage source is grounded.

[0049] The CC1 connection circuit includes voltage detection point one 3, first controllable switch S1 and first resistor R1.

[0050] CC1 wire harness of the vehicle end is connected with one end of the voltage detection point one 3, the other end of the voltage detection point one 3 is connected with one end of the first controllable switch S1 and the charging standard selection circuit, and the other end of the first controllable switch S1 is connected with the first resistor R1 and then grounded.

[0051] ​The CC1 connection circuit further comprises a diode D1.

[0052] The CC1 wire harness of the whole vehicle end is connected with the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected with one end of the voltage detection point 3.

[0053] The charging standard selection circuit comprises a selection switch S2, a second resistor R2 and a third resistor R3.

[0054] The selection switch S2 comprises a common contact point, a first contact point 1, an open contact point 0 and a second contact point 2. The common contact point is connected with the other end of the voltage detection point 3. The first contact point 1 is connected with the second resistor R2 and then grounded. The second contact point 2 is connected with the third resistor R3 and then grounded. The open contact point 0 is suspended.

[0055] The working principle of the embodiment is as follows:

[0056] When the voltage of the voltage detection point 2 is defined as 8V in advance in the electronic control unit of the whole vehicle end, the selection switch S2 is closed to the first contact point 1, and the GB2015 national standard fast charging process is entered. When the voltage of the voltage detection point 2 is defined as 6V, the first controllable switch S1 is closed, and when the voltage of the voltage detection point 1 is 12V, the selection switch S2 is closed to the second contact point 2, and the GB2023 national standard fast charging process is entered.

[0057] The third controllable switch S3 is normally open, and the voltage of the voltage detection point 2 is 0V. When the vehicle is activated and awakened (for example, when the fast charging gun is inserted), the third controllable switch S3 is closed, the voltage of the voltage detection point 2 is collected by the voltage sensor, the voltage is 8V, the third controllable switch S3 is opened, the GB2015 charging national standard is entered, the selection switch S2 is switched to the first contact point 1, and then the communication with the charging pile is started.

[0058] If the voltage of the voltage detection point 2 is 6V, the third controllable switch S3 is opened, the first controllable switch S1 is closed, the voltage of the voltage detection point 1 is collected and is 12V, the BMS charging message is sent, the selection switch S2 is switched to the second contact point 2 at this time, the communication with the charging pile is started, the GB2023 charging process is entered, and the charging is not performed when the voltage of the voltage detection point 2 is not equal to 8V or 6V, or the voltage of the voltage detection point 2 is 6V but the voltage of the voltage detection point 1 is not equal to 12V.

[0059] In the embodiment 2 as shown in the figure, a charging standard compatible switching circuit is provided. The charging standard compatible switching circuit is based on the embodiment 1 and is provided with an anti-reverse and filtering circuit. The anti-reverse and filtering circuit comprises a differential mode inductor LD, a TVS tube (transient voltage suppression diode), a first capacitor C1 and a second capacitor C2. Figure 2

[0060] ​The other end of the voltage detection point one 3 is connected with one end of the differential mode inductor LD, one end of the TVS tube and one end of the first capacitor C1 respectively, the other end of the TVS tube is connected with one end of the second capacitor C2 and the common contact point of the selection switch S2 respectively, and the other end of the differential mode inductor LD, the other end of the first capacitor C1 and the other end of the first capacitor C2 are grounded.

[0061] The CC2 connection circuit further comprises a fifth resistor R5, one end of the fifth resistor R5 is connected with one end of the third controllable switch S3, and the other end of the fifth resistor R5 is connected with the voltage source.

[0062] In the embodiment 3, the utility model also provides a new energy automobile, including the charging standard compatible switching circuit of first aspect. Through adding the charging standard compatible switching circuit in the new energy automobile, the new energy automobile can adapt to different fast charging standards and meet the fast charging diversity of the new energy automobile.

[0063] The above-mentioned is only the preferred embodiment of the utility model, and it should be pointed out that, for the ordinary skilled person in the art, on the premise of not departing from the technical principle of the utility model, a plurality of improvements and deformations can be made, and these improvements and deformations should be regarded as the protection range of the utility model.

Claims

1. A charging standard compatible switching circuit, characterized by, The application relates to a charging standard selection circuit and a charging standard selection method. The CC2 connecting circuit is connected with a voltage source at one end of the vehicle end electronic control unit, and connected with a CC2 wire harness at the other end of the vehicle end; the CC2 connecting circuit is used for collecting voltage values input through the CC2 wire harness and transmitting the voltage values to the vehicle end electronic control unit; The CC1 connecting circuit is connected with the charging standard selection circuit at one end, and connected with a CC1 wire harness at the other end of the vehicle end; the CC1 connecting circuit is used for collecting voltage values input through the CC1 wire harness and transmitting the voltage values to the vehicle end electronic control unit; The vehicle end electronic control unit outputs a switch control signal to the charging standard selection circuit, and the charging standard selection circuit is used for receiving the switch control signal and closing the switch of the corresponding charging standard.

2. The charge standard compliant switching circuit of claim 1, wherein, The CC2 connecting circuit comprises a voltage detection point two, a third controllable switch S3 and a fourth resistor R4. One end of the voltage detection point two is connected with the CC2 wire harness of the vehicle end, and the other end of the voltage detection point two is connected with the third controllable switch S3, the fourth resistor R4 and the positive electrode of the voltage source; the negative electrode of the voltage source is grounded.

3. The charge standard compliant switching circuit of claim 2, wherein, The CC2 connecting circuit further comprises a fifth resistor R5, one end of the fifth resistor R5 is connected with one end of the third controllable switch S3, and the other end of the fifth resistor R5 is connected with the voltage source.

4. The charge standard-compliant switching circuit of claim 1, wherein, The CC1 connecting circuit comprises a voltage detection point one, a first controllable switch S1 and a first resistor R1. One end of the CC1 wire harness of the vehicle end is connected with the voltage detection point one, and the other end of the voltage detection point one is connected with one end of the first controllable switch S1 and the charging standard selection circuit; the other end of the first controllable switch S1 is connected with the first resistor R1 and then grounded.

5. The charge standard-compliant switching circuit of claim 4, wherein, The CC1 connecting circuit further comprises a diode D1. The CC1 wire harness of the vehicle end is connected with the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected with one end of the voltage detection point one.

6. A charge standard compliant switching circuit according to claim 4 or 5, characterised in that, The charging standard selection circuit comprises a selection switch S2, a second resistor R2 and a third resistor R3. The selection switch S2 comprises a common contact point, a first contact point (1), an open contact point (0) and a second contact point (2); the common contact point is connected with the other end of the voltage detection point one; the first contact point (1) is connected with the second resistor R2 and then grounded; the second contact point (2) is connected with the third resistor R3 and then grounded; and the open contact point (0) is suspended.

7. The charge standard-compliant switching circuit of claim 6, wherein, The anti-reverse circuit comprises a TVS tube, one end of the TVS tube is connected with the other end of the voltage detection point one, and the other end of the TVS tube is connected with the common contact point of the selection switch S2. The anti-reverse and filtering circuit comprises a differential mode inductor LD, a TVS tube, a first capacitor C1 and a second capacitor C2.

8. The charge standard-compliant switching circuit of claim 6, wherein, The other end of the voltage detection point one is respectively connected with one end of the differential mode inductor LD and one end of the TVS tube; the other end of the TVS tube is connected with the common contact point of the selection switch S2; and the other end of the differential mode inductor LD is grounded. ​ ​ 9. The charge standard-compliant switching circuit of claim 6, wherein, ​ ​ The other end of the voltage detection point one is connected to one end of a differential mode inductor LD, one end of a TVS tube, and one end of a first capacitor C1, respectively. The other end of the TVS tube is connected to one end of a second capacitor C2 and a common contact point of a selection switch S2, respectively. The other end of the differential mode inductor LD, the other end of the first capacitor C1, and the other end of the first capacitor C2 are connected to ground, respectively.

10. A new energy vehicle, characterized in that, A charging standard compatible switching circuit comprising the charging standard compatible switching circuit of any one of claims 1-9.

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