Switch sintering detection method of charging circuit, controller, vehicle and medium

Abstract

The invention relates to a switch sintering detection method of a charging circuit, a controller, a vehicle and a medium, and relates to the technical field of circuit detection.The method comprises the steps that a comparison circuit is formed by controlling on-off of a switch assembly, a booster circuit, a first battery pack and a second battery pack, and a first comparison voltage and a second comparison voltage in the comparison circuit are obtained, the first comparison voltage comprises at least one of a first voltage corresponding to the charging port and a second voltage corresponding to the first load, and the second comparison voltage comprises at least one of a third voltage corresponding to the first battery pack and a fourth voltage corresponding to the second battery pack; according to the method, the sintering result of the switch assembly is determined, the sintering result of the switch assembly of the charging circuit can be determined under the condition of not increasing any voltage sampling line, the structure can be simplified, and the cost can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of circuit detection, and in particular to a switch sintering detection method, a controller, a vehicle and a medium of a charging circuit. Background Art

[0002] In electric vehicles with a dual battery pack architecture, including a high-voltage battery pack and a low-voltage battery pack, sintering of the charging circuit switch may cause the high-voltage battery pack and the low-voltage battery pack to be directly connected in parallel, thereby causing overvoltage damage to the low-voltage battery pack. At the same time, it may cause the vehicle's charging port voltage to be high and cause electric shock to people.

[0003] In the related art, the sintering condition of the switch of the charging circuit is determined by directly detecting the voltage across the switch of the charging circuit, which requires adding more voltage sampling lines, resulting in a more complex structure and increased costs. Summary of the invention

[0004] The purpose of the present disclosure is to provide a switch sintering detection method, controller, vehicle and medium of a charging circuit. By controlling the on and off of a switch component, a boost circuit, a first battery pack and a second battery pack, a comparison circuit is formed, and a first comparison voltage and a second comparison voltage in the comparison circuit are obtained. The first comparison voltage includes at least one of a first voltage corresponding to a charging port and a second voltage corresponding to a first load, and the second comparison voltage includes at least one of a third voltage corresponding to the first battery pack and a fourth voltage corresponding to the second battery pack. Finally, the sintering result of the switch component is determined according to the first comparison voltage and the second comparison voltage. The sintering result of the switch component of the charging circuit can be determined without adding any voltage sampling lines, and the structure can be simplified and the cost can be reduced.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for detecting switch burning of a charging circuit is provided, comprising:

[0006] Control the on and off of the switch assembly 4, the boost circuit 5, the first battery pack 1 and the second battery pack 2 to form a comparison circuit;

[0007] Determine the sintering result of the switch assembly according to a first comparison voltage and a second comparison voltage in the comparison circuit, wherein the first comparison voltage includes at least one of a first voltage corresponding to the charging port 3 and a second voltage corresponding to the first load 6, and the second comparison voltage includes at least one of a third voltage corresponding to the first battery pack 1 and a fourth voltage corresponding to the second battery pack 2;

[0008] Among them, the charging circuit includes a first battery pack 1, a second battery pack 2, a charging port 3, a switch component 4, a boost circuit 5 and a first load 6. The first battery pack 1 and the second battery pack 2 are both connected to the charging port 3 through the switch component 4, the first load 6 is connected to the connecting circuit between the switch component 4 and the first battery pack 1, and the first battery pack 1 and the second battery pack 2 are connected through the boost circuit 5.

[0009] Optionally, the switch assembly 4, the boost circuit 5, the first battery pack 1 and the second battery pack 2 are controlled to be turned on and off to form a comparison circuit, including:

[0010] Control the switch components 4 at both ends of the charging port 3 to be disconnected, control the first battery pack 1 to disconnect the circuit, control the second battery pack 2 to connect the circuit, and control the bridge arm groups 52 to be closed, so that the charging port 3 and the first load 6 are disconnected from the first battery pack 1 and the second battery pack 2, and a first comparison circuit is obtained;

[0011] Among them, the switch assembly 4 includes a first switch 41, a second switch 42 and a third switch 43, the boost circuit 5 includes a bridge arm group 52, the first end of the charging port 3 is connected to the first end of the first load 6, the first end of the first battery pack 1 and the neutral line of the bridge arm group 52 through the positive main line 81, the first end of the charging port 3 is connected to the first end of the bridge arm group 52 and the first end of the second battery pack 2 through the positive sub-line 82, the second end of the charging port 3 is connected to the second end of the first load 6, the second end of the first battery pack 1, the second end of the bridge arm group 52 and the second end of the second battery pack 2 through the negative main line 83, and the first switch 41, the second switch 42 and the third switch 43 are respectively arranged on the positive sub-line 82, the positive main line 81 and the negative main line 83 near the charging port 3.

[0012] Optionally, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0013] When the difference between the second voltage corresponding to the first load 6 and the fourth voltage corresponding to the second battery pack 2 in the first comparison circuit is within a preset range, it is determined that the first switch 41 and the second switch 42 are sintered;

[0014] After determining that the first switch 41 and the second switch 42 are sintered, when the difference between the first voltage corresponding to the charging port 3 in the first comparison circuit and the fourth voltage corresponding to the second battery pack 2 is within a preset range, it is determined that the first switch 41, the second switch 42 and the third switch 43 are sintered.

[0015] Optionally, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0016] When the difference between the second voltage corresponding to the first load 6 in the first comparison circuit and the fourth voltage corresponding to the second battery pack 2 is outside a preset range, comparing the first voltage corresponding to the charging port 3 in the first comparison circuit with the fourth voltage corresponding to the second battery pack 2;

[0017] When the difference between the first voltage corresponding to the charging port 3 and the fourth voltage corresponding to the second battery pack 2 in the first comparison circuit is within a preset range, it is determined that the first switch 41 and the third switch 43 are sintered.

[0018] Optionally, the method further comprises:

[0019] The switch components 4 at both ends of the charging port 3 are controlled to be disconnected, and the first battery pack 1 is controlled to connect the circuit, the second battery pack 2 is controlled to disconnect the circuit, and the bridge arm groups 52 are controlled to be closed, so that the first load 6 is connected to the first battery pack 1, the first load 6 is disconnected from the second battery pack 2, and the charging port 3 is disconnected from the first battery pack 1 and the second battery pack 2, so as to obtain a second comparison circuit.

[0020] Optionally, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0021] When the difference between the first voltage corresponding to the charging port 3 and the third voltage corresponding to the first battery pack 1 in the second comparison circuit is within a preset range, it is determined that the second switch 42 and the third switch 43 are sintered.

[0022] Optionally, the method further comprises:

[0023] When the difference between the first voltage corresponding to the charging port 3 and the third voltage corresponding to the first battery pack 1 in the second comparison circuit is outside the preset range, based on the second comparison circuit, the second switch 42 is controlled to be closed so that the first end of the charging port 3 is connected to the first end of the first battery pack 1, thereby obtaining a third comparison circuit;

[0024] The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises:

[0025] When the difference between the first voltage corresponding to the charging port 3 and the third voltage corresponding to the first battery pack 1 in the third comparison circuit is within a preset range, it is determined that the third switch 43 is sintered.

[0026] Optionally, the method further comprises:

[0027] When the difference between the first voltage corresponding to the charging port 3 and the third voltage corresponding to the first battery pack 1 in the third comparison circuit is outside the preset range, based on the third comparison circuit, the second switch 42 is controlled to be disconnected, the third switch 43 is controlled to be closed, the bridge arm group 52 is controlled to be continuously opened and closed, and the second battery pack 2 is controlled to connect the circuit, so that the second end of the charging port 3 is connected to the second end of the first battery pack 1, thereby obtaining a fourth comparison circuit;

[0028] The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises:

[0029] When the difference between the first voltage corresponding to the charging port 3 and the third voltage corresponding to the first battery pack 1 in the fourth comparison circuit is within a preset range, it is determined that the second switch 42 is sintered.

[0030] Optionally, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0031] When the difference between the first voltage corresponding to the charging port 3 in the fourth comparison circuit and the third voltage corresponding to the first battery pack 1 is outside a preset range, compare the first voltage corresponding to the charging port 3 in the fourth comparison circuit with the fourth voltage corresponding to the second battery pack 2;

[0032] When the difference between the first voltage corresponding to the charging port 3 and the fourth voltage corresponding to the second battery pack 2 in the fourth comparison circuit is within a preset range, it is determined that the first switch 41 is sintered.

[0033] Optionally, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0034] When the difference between the first voltage corresponding to the charging port 3 and the fourth voltage corresponding to the second battery pack 2 in the fourth comparison circuit is outside a preset range, it is determined that the first switch 41 , the second switch 42 and the third switch 43 are not sintered.

[0035] According to a second aspect of an embodiment of the present disclosure, there is provided a controller, including:

[0036] a memory having a computer program stored thereon;

[0037] The processor is used to execute the computer program in the memory so that the controller performs the steps of the switch sintering detection method for the charging circuit provided in the first aspect of the present disclosure.

[0038] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, comprising the charging circuit provided by the first aspect of the present disclosure and the controller provided by the second aspect of the present disclosure, wherein the controller is connected to the charging circuit.

[0039] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the switch sintering detection method for the charging circuit provided in the first aspect of the present disclosure are implemented.

[0040] Through the above technical solution, by controlling the on and off of the switch component, the boost circuit, the first battery pack and the second battery pack, a comparison circuit is formed, and the first comparison voltage and the second comparison voltage in the comparison circuit are obtained, the first comparison voltage includes at least one of the first voltage corresponding to the charging port and the second voltage corresponding to the first load, the second comparison voltage includes at least one of the third voltage corresponding to the first battery pack and the fourth voltage corresponding to the second battery pack, and finally, according to the first comparison voltage and the second comparison voltage, the sintering result of the switch component is determined, and the sintering result of the switch component of the charging circuit can be determined without adding any voltage sampling lines, which can simplify the structure and reduce costs.

[0041] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0043] Figure 1 The figure is a schematic diagram showing the structure of a charging circuit according to an exemplary embodiment.

[0044] Figure 2 is a schematic structural diagram of another charging circuit according to an exemplary embodiment.

[0045] Figure 3 is a schematic structural diagram of yet another charging circuit according to an exemplary embodiment.

[0046] Figure 4 is a schematic structural diagram of yet another charging circuit according to an exemplary embodiment.

[0047] Figure 5 The figure is a flow chart of a method for detecting switch sintering of a charging circuit according to an exemplary embodiment.

[0048] Figure 6 The figure is a logic diagram of a method for detecting switch burning of a charging circuit according to an exemplary embodiment.

[0049] Figure 7 is a block diagram of a controller according to an exemplary embodiment.

[0050] Figure 8 is a block diagram of a vehicle according to an exemplary embodiment.

[0051] Description of Reference Numerals

[0052] 1. First battery pack; 11. Fourth switch; 12. Fifth switch; 2. Second battery pack; 21. Sixth switch; 22. Seventh switch; 3. Charging port; 4. Switch assembly; 41. First switch; 42. Second switch; 43. Third switch; 5. Boost circuit; 51. Winding; 52. Bridge arm group; 6. First load; 7. Second load; 81. Positive main line; 82. Positive sub-line; 83. Negative main line. DETAILED DESCRIPTION

[0053] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0054] Before introducing the switch burning detection method of the charging circuit disclosed in the present invention, a part of the charging circuit to which the switch burning detection method of the charging circuit shown in an exemplary embodiment of the present invention is applicable is first introduced.

[0055] Figure 1 is a schematic structural diagram of a charging circuit according to an exemplary embodiment. Figure 2 is a schematic structural diagram of another charging circuit according to an exemplary embodiment. Figure 3 is a schematic structural diagram of another charging circuit according to an exemplary embodiment. Figure 4 is a schematic diagram of a structure of another charging circuit according to an exemplary embodiment. Figures 1 to 4As shown, in an exemplary embodiment, the charging circuit may include a first battery pack 1, a second battery pack 2, a charging port 3, a switch assembly 4, a boost circuit 5 and a first load 6, wherein the first battery pack 1 and the second battery pack 2 may be a low-voltage battery pack and a high-voltage battery pack, respectively, the charging port 3 is used to connect a charging gun or a discharging gun for charging and discharging, the switch assembly 4 can be used for charging and discharging control, the boost circuit 5 is used to boost the voltage so as to boost and charge the high-voltage battery pack, and the first load 6 may be a low-voltage load or a high-voltage load.

[0056] The first battery pack 1 and the second battery pack 2 can both be connected to the charging port 3 through the switch assembly 4, so that the charging and discharging of the first battery pack 1 and the second battery pack 2 can be controlled by the switch assembly 4. The first load 6 is connected to the connection circuit between the switch assembly 4 and the first battery pack 1. The first battery pack 1 and the second battery pack 2 are connected through the boost circuit 5, so that the current transmitted from the first battery pack 1 or the charging port 3 can be boosted by the boost circuit 5 and then boosted and charged to the second battery pack 2. In a possible implementation, the charging circuit may also include a second load 7, which may be an electric drive system connected to both ends of the second battery pack 2.

[0057] In a possible implementation, the switch assembly 4 includes a first switch 41, a second switch 42 and a third switch 43, and the boost circuit 5 includes a winding 51 and a bridge arm group 52. A positive main line 81 is led out from the first end of the charging port 3 and connected to the winding 51, and the other end of the winding 51 is connected to the midpoint of the bridge arm group 52; a positive sub-line 82 is led out from the positive main line 81 and connected to the positive electrode of the second battery pack 2, and a negative main line 83 is led out from the second end of the charging port 3 and connected to the negative electrode of the second battery pack 2, and the two ends of the bridge arm group 52 are respectively connected to the positive sub-line 82 and the negative main line 83 near one end of the second battery pack 2; the positive sub-line 82, the positive main line 81 and the negative main line 83 are connected to the charging port 3. A first switch 41, a second switch 42 and a third switch 43 are respectively arranged on one side of the first battery pack 1, the positive electrode of the first battery pack 1 is connected to the positive electrode main line 81 between the second switch 42 and the winding 51, and the negative electrode of the first battery pack 1 is connected to the negative electrode main line 83 between the third switch 43 and the second battery pack 2; a first end of the first load 6 is connected to the positive electrode main line 81 between the second switch 42 and the winding 51, and a second end of the first load 6 is connected to the negative electrode main line 83 between the third switch 43 and the second battery pack 2.

[0058] The fourth switch 11 and the fifth switch 12 may be respectively arranged on the connecting lines at both ends of the first battery pack 1 , and the sixth switch 21 and the seventh switch 22 may be respectively arranged on the connecting lines at both ends of the second battery pack 2 .

[0059] In a possible implementation, a capacitor may be further provided between the first battery pack 1 and the boost circuit 5 .

[0060] In a possible embodiment, the second load 7 may be a multi-phase motor, which includes a multi-phase bridge arm and multiple windings, one end of the multiple windings are converged, and the other ends of the multiple windings are respectively connected to the midpoint of the multi-phase bridge arm, and the two ends of the multi-phase bridge arm are respectively connected to the two ends of the second battery pack 2.

[0061] In a possible embodiment, the second battery pack 2 may include an upper half pack and a lower half pack, and the second load 7 may be a multi-phase motor, which includes a multi-phase bridge arm and multiple windings, one end of the multiple windings converges and is connected between the upper half pack and the lower half pack, and the other ends of the multiple windings are respectively connected to the midpoint of the multi-phase bridge arm, and the two ends of the multi-phase bridge arm are respectively connected to the two ends of the second battery pack 2.

[0062] In a possible implementation, in the boost circuit 5, the winding 51 may be a plurality of windings, the bridge arm group 52 may be a multi-phase bridge arm, one ends of the plurality of windings converge and are connected to the positive main line 81, the other ends of the plurality of windings are respectively connected to the midpoint of the multi-phase bridge arm, and the two ends of the multi-phase bridge arm are respectively connected to the positive sub-line 82 and the negative main line 83.

[0063] Figure 5 is a flow chart showing a method for detecting switch sintering of a charging circuit according to an exemplary embodiment. Figure 5 As shown, the method can be applied to a controller in a vehicle, the controller is respectively connected to a switch component of a charging circuit, a boost circuit, a first battery pack, a second battery pack and a first load, and the switch sintering detection method of the charging circuit may include the following steps:

[0064] In step S501, the switch assembly, the boost circuit, the first battery pack and the second battery pack are controlled to be turned on and off to form a comparison circuit.

[0065] In this embodiment, the controller can control the on and off of the switch component, the boost circuit, the first battery pack and the second battery pack. Specifically, the on and off of the switch component, the boost circuit, the first battery pack and the second battery pack can be controlled in batches at different times, so that a comparison circuit can be obtained after each control, so that different comparison circuits can be obtained at different times, forming at least one comparison circuit.

[0066] In step S502, the sintering result of the switch component is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, the first comparison voltage includes at least one of the first voltage corresponding to the charging port and the second voltage corresponding to the first load, and the second comparison voltage includes at least one of the third voltage corresponding to the first battery pack and the fourth voltage corresponding to the second battery pack.

[0067] In this embodiment, a first comparison voltage and a second comparison voltage can be obtained respectively, wherein the first comparison voltage can be at least one of a first voltage corresponding to the charging port and a second voltage corresponding to the first load, and the second comparison voltage can be at least one of a third voltage corresponding to the first battery pack and a fourth voltage corresponding to the second battery pack, so as to determine the sintering result of the switch component based on the first comparison voltage and the second comparison voltage.

[0068] Specifically, the first comparison voltage and the second comparison voltage corresponding to each comparison circuit may be compared, and the sintering result of the switch component may be determined according to the comparison result, wherein the sintering result includes sintering and unsintering.

[0069] By controlling the on and off of the switch component, the boost circuit, the first battery pack and the second battery pack, a comparison circuit is formed, and the first comparison voltage and the second comparison voltage in the comparison circuit are obtained, the first comparison voltage includes at least one of the first voltage corresponding to the charging port and the second voltage corresponding to the first load, the second comparison voltage includes at least one of the third voltage corresponding to the first battery pack and the fourth voltage corresponding to the second battery pack, and finally the sintering result of the switch component is determined according to the first comparison voltage and the second comparison voltage. The sintering result of the switch component of the charging circuit can be determined without adding any voltage sampling lines, which can simplify the structure and reduce costs.

[0070] In a possible implementation, controlling the on and off of the switch assembly, the boost circuit, the first battery pack, and the second battery pack to form a comparison circuit may include:

[0071] The switch components at both ends of the charging port are controlled to be disconnected, the first battery pack is controlled to disconnect the circuit, the second battery pack is controlled to connect the circuit, and the bridge arm groups are controlled to be closed, so that the charging port and the first load are disconnected from the first battery pack and the second battery pack, and a first comparison circuit is obtained.

[0072] In this embodiment, in order not to affect the normal use of the vehicle, the sintering detection of the switch can be performed during the process of the vehicle power-off. That is, in response to the power-off instruction, the switch components can be controlled to be disconnected, that is, the first switch, the second switch and the third switch can be controlled to be disconnected, and the first battery pack can be controlled to disconnect the circuit, for example, the fourth switch and the fifth switch at both ends of the first battery pack can be controlled to be disconnected, so that the first battery pack cannot output current, and the second battery pack can be controlled to connect the circuit, for example, the sixth switch and the seventh switch at both ends of the second battery pack can be controlled to be closed, so that the second battery pack can output current, and the bridge arm groups in the boost circuit are controlled to be closed, that is, the upper bridge arm and the lower bridge arm in the boost circuit are closed, and current cannot pass through, and the first comparison circuit is obtained. If the difference between the first voltage corresponding to the charging port in the first comparison circuit and the fourth voltage corresponding to the second battery pack is outside the preset range, the DC charging contactor sintering detection in this power-off process is terminated, and then the second battery pack is controlled to disconnect the circuit. At this time, the first battery pack and the second battery pack are both disconnected, and the power-off can be completed. Therefore, the formation of the comparison circuit can be completed during the power-off process without adding other connecting wires, saving costs.

[0073] In a possible implementation, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit may include:

[0074] When the difference between the second voltage corresponding to the first load in the first comparison circuit and the fourth voltage corresponding to the second battery pack is within a preset interval, it is determined that the first switch and the second switch are sintered; after determining that the first switch and the second switch are sintered, when the difference between the first voltage corresponding to the charging port in the first comparison circuit and the fourth voltage corresponding to the second battery pack is within a preset interval, it is determined that the first switch, the second switch and the third switch are sintered.

[0075] In this embodiment, under normal circumstances, the second voltage corresponding to the first load in the first comparison circuit and the fourth voltage corresponding to the second battery pack are both zero. If the difference between the second voltage corresponding to the first load in the first comparison circuit and the fourth voltage corresponding to the second battery pack is within a preset interval, it is confirmed that the second voltage corresponding to the first load in the first comparison circuit and the fourth voltage corresponding to the second battery pack are approximately equal under the condition of satisfying the error, then the first switch and the second switch are sintered, so that the first load is connected to the second battery pack. After determining that the first switch and the second switch are sintered, the first voltage corresponding to the charging port in the first comparison circuit and the fourth voltage corresponding to the second battery pack can be further determined. If the difference between the first voltage corresponding to the charging port in the first comparison circuit and the fourth voltage corresponding to the second battery pack is within a preset interval, then the first switch and the third switch are sintered, so that the charging port is connected to the second battery pack, and the sintering result of the switch assembly can be determined as the first switch, the second switch and the third switch are all sintered. In this way, the sintering result of the switch assembly can be determined without adding connecting wires, saving costs.

[0076] In a possible implementation, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0077] When the difference between the second voltage corresponding to the first load in the first comparison circuit and the fourth voltage corresponding to the second battery pack is outside the preset interval, the first voltage corresponding to the charging port in the first comparison circuit is compared with the fourth voltage corresponding to the second battery pack; when the difference between the first voltage corresponding to the charging port in the first comparison circuit and the fourth voltage corresponding to the second battery pack is within the preset interval, it is determined that the first switch and the third switch are sintered.

[0078] In this embodiment, if the difference between the second voltage corresponding to the first load in the first comparison circuit and the fourth voltage corresponding to the second battery pack is outside the preset range, the first switch and the second switch are not sintered at the same time, and the first load is not connected to the second battery pack. The next step of diagnosis can be entered to compare the first voltage corresponding to the charging port in the first comparison circuit with the fourth voltage corresponding to the second battery pack. If the difference between the first voltage corresponding to the charging port in the first comparison circuit and the fourth voltage corresponding to the second battery pack is within the preset range, the first switch and the third switch are sintered, and the charging port is connected to the second battery pack. It can be determined that the sintering result of the switch component is the sintering of the first switch and the third switch. Therefore, the formation of the comparison circuit can be completed during the power-off process without adding other connecting wires, saving costs.

[0079] In a possible implementation manner, the switch sintering detection method of the charging circuit further includes:

[0080] Control the switch components at both ends of the charging port to be disconnected, control the first battery pack to connect the circuit, control the second battery pack to disconnect the circuit, and control the bridge arm groups to be closed, so that the first load is connected to the first battery pack, the first load is disconnected from the second battery pack, and the charging port is disconnected from the first battery pack and the second battery pack, to obtain a second comparison circuit.

[0081] In this embodiment, the sintering result of the switch assembly can be judged during the power-on process to avoid affecting the normal use of the vehicle. Specifically, in response to the power-on instruction, the switch assemblies can be controlled to be disconnected, that is, the first switch, the second switch and the third switch can be controlled to be disconnected, and the first battery pack can be controlled to connect the circuit, for example, the fourth switch and the fifth switch at both ends of the first battery pack can be controlled to be closed, so that the first battery pack can output current, and the second battery pack can be controlled to disconnect the circuit, for example, the sixth switch and the seventh switch at both ends of the second battery pack can be controlled to be disconnected, so that the second battery pack cannot output current, and the bridge arm groups in the boost circuit are controlled to be closed, that is, the upper bridge arm and the lower bridge arm in the boost circuit are closed, and current cannot pass through, so as to obtain the second comparison circuit. In this way, the second comparison circuit can be obtained by the way of controlling during the vehicle power-on process, avoiding additional connecting wires and saving costs.

[0082] In a possible implementation, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0083] When the difference between the first voltage corresponding to the charging port in the second comparison circuit and the third voltage corresponding to the first battery pack is within a preset range, it is determined that the second switch and the third switch are sintered, thereby determining the sintering result of the switch assembly without adding connecting wires, saving costs.

[0084] In a possible implementation, the method further includes:

[0085] When the difference between the first voltage corresponding to the charging port and the third voltage corresponding to the first battery pack in the second comparison circuit is outside the preset range, based on the second comparison circuit, the second switch is controlled to be closed so that the first end of the charging port is connected to the first end of the first battery pack, thereby obtaining a third comparison circuit;

[0086] Determining a sintering result of the switch component according to a first comparison voltage and a second comparison voltage in a comparison circuit includes:

[0087] When the difference between the first voltage corresponding to the charging port and the third voltage corresponding to the first battery pack in the third comparison circuit is within a preset range, it is determined that the third switch (43) is sintered.

[0088] In this embodiment, if the difference between the first voltage corresponding to the charging port in the second comparison circuit and the third voltage corresponding to the first battery pack is outside the preset range, the second switch and the third switch are not sintered at the same time, and the charging port is not connected to the first battery pack, then the next step of judgment is entered, and the controller determines whether the vehicle charging port cover is closed. If it is confirmed to be closed, the second switch can be controlled to close based on the second comparison circuit to obtain the third comparison circuit. If the difference between the first voltage corresponding to the charging port in the third comparison circuit and the third voltage corresponding to the first battery pack is within the preset range, it can be determined that the sintering result of the switch assembly is the sintering of the third switch in the switch assembly. In this way, the sintering result of the switch assembly can be determined without adding connecting wires, saving costs.

[0089] In a possible implementation, the method further includes:

[0090] When the difference between the first voltage corresponding to the charging port and the third voltage corresponding to the first battery pack in the third comparison circuit is outside the preset range, based on the third comparison circuit, the second switch is controlled to be opened, the third switch is controlled to be closed, the bridge arm group is controlled to be continuously opened and closed, and the second battery pack is controlled to connect the circuit so that the second end of the charging port is connected to the second end of the first battery pack, thereby obtaining a fourth comparison circuit;

[0091] Determining a sintering result of the switch component according to a first comparison voltage and a second comparison voltage in a comparison circuit includes:

[0092] When the difference between the first voltage corresponding to the charging port and the third voltage corresponding to the first battery pack in the fourth comparison circuit is within a preset range, it is determined that the second switch is sintered.

[0093] In this embodiment, if the difference between the first voltage corresponding to the charging port in the third comparison circuit and the third voltage corresponding to the first battery pack is outside the preset interval, the second switch and the third switch are not sintered at the same time, and the charging port is not connected to the first battery pack, then the next step of judgment is entered. Based on the third comparison circuit, the second switch can be controlled to be disconnected, the third switch can be controlled to be closed, and the bridge arm group can be controlled to be opened, that is, the upper bridge arm and the lower bridge arm in the boost circuit are both opened, and current can be passed, and the second battery pack is controlled to connect the circuit. For example, the sixth switch and the seventh switch at both ends of the second battery pack can be controlled to be closed, so that the second battery pack can output current, thereby obtaining the fourth comparison circuit. At this time, the first battery pack and the second battery pack are both connected to the circuit, and the vehicle can be powered on. If the difference between the first voltage corresponding to the charging port in the fourth comparison circuit and the third voltage corresponding to the first battery pack is within the preset interval, it can be determined that the sintering result of the switch assembly is that the second switch in the switch assembly is sintered. In this way, the sintering result of the switch assembly can be determined without adding connecting wires, saving costs.

[0094] In a possible implementation, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0095] When the difference between the first voltage corresponding to the charging port in the fourth comparison circuit and the third voltage corresponding to the first battery pack is outside the preset range, the first voltage corresponding to the charging port in the fourth comparison circuit is compared with the fourth voltage corresponding to the second battery pack; when the difference between the first voltage corresponding to the charging port in the fourth comparison circuit and the fourth voltage corresponding to the second battery pack is within the preset range, it is determined that the first switch is sintered.

[0096] In this embodiment, if the difference between the first voltage corresponding to the charging port in the fourth comparison circuit and the third voltage corresponding to the first battery pack is outside the preset range, the second switch and the third switch are not sintered at the same time, and the charging port is not connected to the first battery pack, and then the next step is to compare the first voltage corresponding to the charging port in the fourth comparison circuit with the fourth voltage corresponding to the second battery pack. If the difference between the first voltage corresponding to the charging port in the fourth comparison circuit and the fourth voltage corresponding to the second battery pack is within the preset range, the first switch is sintered, and the charging port is connected to the second battery pack. It can be determined that the sintering result of the switch assembly is that the first switch in the switch assembly is sintered. In this way, the sintering result of the switch assembly can be determined without adding connecting wires, saving costs.

[0097] In a possible implementation, determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit includes:

[0098] When the difference between the first voltage corresponding to the charging port and the fourth voltage corresponding to the second battery pack in the fourth comparison circuit is outside the preset range, it is determined that the first switch, the second switch and the third switch are not sintered.

[0099] In this embodiment, if the difference between the first voltage corresponding to the charging port in the fourth comparison circuit and the fourth voltage corresponding to the second battery pack is outside the preset range, it can be determined that the sintering result of the switch assembly is that the first switch, the second switch and the third switch are not sintered. Thus, the sintering result of the switch assembly is determined without adding connecting wires, saving costs.

[0100] In a possible implementation, before controlling the second switch to close and obtaining the third comparison circuit, the switch sintering detection method of the charging circuit also includes: confirming the closing state of the charging port cover, and when the charging port cover is in the closed state, controlling the second switch to close and obtaining the third comparison circuit to avoid the risk of electric shock to the user.

[0101] When the closing state of the charging port cover is not closed, a prompt message is output, and the prompt message is used to prompt the user to close the charging port cover.

[0102] Figure 6 is a logic diagram of a method for detecting switch sintering of a charging circuit according to an exemplary embodiment. Figure 6 As shown in the figure, K1 is the first switch, K2 is the second switch, K3 is the third switch, K4 is the fourth switch, K5 is the fifth switch, K6 is the sixth switch, K7 is the seventh switch, G1 is the upper bridge arm in the bridge arm group, G2 is the lower bridge arm in the bridge arm group, Ve is the voltage of the charging port, Vc is the voltage of the first load, Vbat1 is the voltage of the first battery pack, and Vbat2 is the voltage of the second battery pack.

[0103] Figure 7 is a block diagram of a controller according to an exemplary embodiment. Figure 7 The controller 700 includes a processor 722, which may be one or more, and a memory 732 for storing a computer program executable by the processor 722. The computer program stored in the memory 732 may include one or more modules, each corresponding to a set of instructions. In addition, the processor 722 may be configured to execute the computer program so that the controller 700 performs the above-mentioned switch burning detection method of the charging circuit.

[0104] In addition, the controller 700 may further include a power supply component 726 and a communication component 790, wherein the power supply component 726 may be configured to perform power management of the controller 700, and the communication component 790 may be configured to implement communication, for example, wired or wireless communication, of the controller 700. In addition, the controller 700 may further include an input / output interface 798. The controller 700 may operate based on an operating system stored in the memory 732.

[0105] Figure 8 is a block diagram of a vehicle according to an exemplary embodiment, such as Figure 8 As shown, in another exemplary embodiment, a vehicle is also provided, comprising the controller and the charging circuit provided in the above embodiment, wherein the controller is connected to the charging circuit.

[0106] In another exemplary embodiment, a computer-readable storage medium including a computer program is also provided, and when the computer program is executed by a processor, the steps of the above-mentioned method for detecting the switch burning of the charging circuit are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 732 including program instructions, and the above-mentioned computer program can be executed by the processor 722 of the controller 700 to complete the above-mentioned method for detecting the switch burning of the charging circuit.

[0107] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and has a code portion for executing the switch burning detection method of the charging circuit when the computer program is executed by the programmable device.

[0108] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0109] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0110] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for detecting switch sintering of a charging circuit, characterized in that: include: Controlling the on and off of the switch assembly (4), the boost circuit (5), the first battery pack (1) and the second battery pack (2) to form a comparison circuit; Determining the sintering result of the switch component according to a first comparison voltage and a second comparison voltage in the comparison circuit, the first comparison voltage comprising at least one of a first voltage corresponding to the charging port (3) and a second voltage corresponding to the first load (6), and the second comparison voltage comprising at least one of a third voltage corresponding to the first battery pack (1) and a fourth voltage corresponding to the second battery pack (2); The charging circuit comprises a first battery pack (1), a second battery pack (2), a charging port (3), a switch component (4), a boost circuit (5) and a first load (6); the first battery pack (1) and the second battery pack (2) are both connected to the charging port (3) via the switch component (4); the first load (6) is connected to the connection circuit between the switch component (4) and the first battery pack (1); and the first battery pack (1) and the second battery pack (2) are connected via the boost circuit (5).

2. The method for detecting switch sintering of a charging circuit according to claim 1, characterized in that: The control switch assembly (4), the boost circuit (5), the first battery pack (1) and the second battery pack (2) are turned on and off to form a comparison circuit, comprising: Controlling the switch components (4) at both ends of the charging port (3) to be disconnected, controlling the first battery pack (1) to disconnect the circuit, controlling the second battery pack (2) to connect the circuit, and controlling the bridge arm groups (52) to be closed, so that the charging port (3) and the first load (6) are disconnected from the first battery pack (1) and the second battery pack (2), thereby obtaining a first comparison circuit; The switch assembly (4) comprises a first switch (41), a second switch (42) and a third switch (43); the boost circuit (5) comprises a bridge arm group (52); the first end of the charging port (3) is respectively connected to the first end of the first load (6), the first end of the first battery pack (1) and the middle line of the bridge arm group (52) through a positive main line (81); the first end of the charging port (3) is respectively connected to the first end of the bridge arm group (52) and the second battery pack (1) through a positive sub-line (82). 2), the second end of the charging port (3) is connected to the second end of the first load (6), the second end of the first battery pack (1), the second end of the bridge arm group (52) and the second end of the second battery pack (2) respectively through the negative main line (83), and the first switch (41), the second switch (42) and the third switch (43) are respectively arranged on the positive sub-line (82), the positive main line (81) and the negative main line (83) on the side close to the charging port (3).

3. The method for detecting switch sintering of a charging circuit according to claim 2, characterized in that: The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises: When the difference between the second voltage corresponding to the first load (6) in the first comparison circuit and the fourth voltage corresponding to the second battery pack (2) is within a preset range, determining that the first switch (41) and the second switch (42) are sintered; After determining that the first switch (41) and the second switch (42) are fired, when the difference between the first voltage corresponding to the charging port (3) in the first comparison circuit and the fourth voltage corresponding to the second battery pack (2) is within a preset range, determining that the first switch (41), the second switch (42) and the third switch (43) are fired.

4. The method for detecting switch sintering of a charging circuit according to claim 2, characterized in that: The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises: When the difference between the second voltage corresponding to the first load (6) in the first comparison circuit and the fourth voltage corresponding to the second battery pack (2) is outside a preset range, comparing the first voltage corresponding to the charging port (3) in the first comparison circuit with the fourth voltage corresponding to the second battery pack (2); When the difference between a first voltage corresponding to the charging port (3) in the first comparison circuit and a fourth voltage corresponding to the second battery pack (2) is within a preset range, it is determined that the first switch (41) and the third switch (43) are sintered.

5. The method for detecting switch sintering of a charging circuit according to claim 2, characterized in that: The method further comprises: The switch components (4) at both ends of the charging port (3) are controlled to be disconnected, the first battery pack (1) is controlled to connect the circuit, the second battery pack (2) is controlled to disconnect the circuit, and the bridge arm group (52) is controlled to be closed, so that the first load (6) is connected to the first battery pack (1), the first load (6) is disconnected from the second battery pack (2), and the charging port (3) is disconnected from the first battery pack (1) and the second battery pack (2), thereby obtaining a second comparison circuit.

6. The method for detecting switch sintering of a charging circuit according to claim 5, characterized in that: The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises: When the difference between the first voltage corresponding to the charging port (3) and the third voltage corresponding to the first battery pack (1) in the second comparison circuit is within a preset range, it is determined that the second switch (42) and the third switch (43) are sintered.

7. The method for detecting switch sintering of a charging circuit according to claim 5, characterized in that: The method further comprises: When the difference between the first voltage corresponding to the charging port (3) and the third voltage corresponding to the first battery pack (1) in the second comparison circuit is outside a preset range, based on the second comparison circuit, the second switch (42) is controlled to be closed so that the first end of the charging port (3) is connected to the first end of the first battery pack (1), thereby obtaining a third comparison circuit; The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises: When the difference between the first voltage corresponding to the charging port (3) and the third voltage corresponding to the first battery pack (1) in the third comparison circuit is within a preset range, it is determined that the third switch (43) is sintered.

8. The method for detecting switch sintering of a charging circuit according to claim 7, characterized in that: The method further comprises: When the difference between the first voltage corresponding to the charging port (3) and the third voltage corresponding to the first battery pack (1) in the third comparison circuit is outside a preset range, based on the third comparison circuit, the second switch (42) is controlled to be disconnected, the third switch (43) is controlled to be closed, the bridge arm group (52) is controlled to be continuously opened and closed, and the second battery pack (2) is controlled to connect the circuit so that the second end of the charging port (3) is connected to the second end of the first battery pack (1), thereby obtaining a fourth comparison circuit; The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises: When the difference between the first voltage corresponding to the charging port (3) and the third voltage corresponding to the first battery pack (1) in the fourth comparison circuit is within a preset range, it is determined that the second switch (42) is sintered.

9. The method for detecting switch sintering of a charging circuit according to claim 8, characterized in that: The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises: When the difference between the first voltage corresponding to the charging port (3) in the fourth comparison circuit and the third voltage corresponding to the first battery pack (1) is outside a preset range, comparing the first voltage corresponding to the charging port (3) in the fourth comparison circuit with the fourth voltage corresponding to the second battery pack (2); When the difference between the first voltage corresponding to the charging port (3) and the fourth voltage corresponding to the second battery pack (2) in the fourth comparison circuit is within a preset range, it is determined that the first switch (41) is sintered.

10. The method for detecting switch sintering of a charging circuit according to claim 9, characterized in that: The step of determining the sintering result of the switch component according to the first comparison voltage and the second comparison voltage in the comparison circuit comprises: When the difference between the first voltage corresponding to the charging port (3) and the fourth voltage corresponding to the second battery pack (2) in the fourth comparison circuit is outside a preset range, it is determined that the first switch (41), the second switch (42) and the third switch (43) are not sintered.

11. A controller, characterized in that: include: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory so that the controller performs the steps of the switch sintering detection method for the charging circuit according to any one of claims 1 to 10.

12. A vehicle, characterized in that: The invention comprises the charging circuit according to any one of claims 1 to 10, and the controller according to claim 11, wherein the controller is connected to the charging circuit.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for detecting switch burning of a charging circuit described in any one of claims 1 to 10 are implemented.

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