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

Abstract

The present disclosure 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: forming a comparison circuit by controlling the on-off of a switch assembly, a boost circuit, a first battery pack and a second battery pack, and obtaining a first comparison voltage and a second comparison voltage in the comparison circuit. The first comparison voltage comprises at least one of a first voltage corresponding to a charging port and a second voltage corresponding to a first load. 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. Finally, the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage. The sintering result of the switch assembly of the charging circuit can be determined without increasing any voltage sampling line, and 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, in particular to a switch sintering detection method of a charging circuit, a controller, a vehicle and a medium. BACKGROUND

[0002] In an electric vehicle with a dual-battery-pack architecture, including a high-voltage battery pack and a low-voltage battery pack, switch sintering of a charging circuit can cause the high-voltage battery pack and the low-voltage battery pack to be directly connected in parallel, thereby causing damage to the low-voltage battery pack due to overvoltage, and can also cause the charging port voltage of the vehicle to be high, thereby causing electric shock to a person.

[0003] In related technologies, 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 the addition of more voltage sampling lines, resulting in a complex structure and increased cost. SUMMARY

[0004] The purpose of the present disclosure is to provide a switch sintering detection method of a charging circuit, a controller, a vehicle and a medium, which forms a comparison circuit by controlling the on-off of a switch assembly, a boost circuit, a first battery pack and a second battery pack, and obtains a first comparison voltage and a second comparison voltage in the comparison circuit, the first comparison voltage including at least one of a first voltage corresponding to a charging port and a second voltage corresponding to a first load, the second comparison voltage including at least one of a third voltage corresponding to the first battery pack and a fourth voltage corresponding to the second battery pack, and finally determining the sintering result of the switch assembly according to the first comparison voltage and the second comparison voltage, which can determine the sintering result of the switch assembly of the charging circuit without adding any voltage sampling lines, thereby simplifying the structure and reducing the cost.

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

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

[0007] determining the sintering result of the switch assembly according to a first comparison voltage and a second comparison voltage in the comparison circuit, the first comparison voltage including at least one of a first voltage corresponding to a charging port 3 and a second voltage corresponding to a first load 6, the second comparison voltage including 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] The charging circuit comprises 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, the first battery pack 1 and the second battery pack 2 are connected with the charging port 3 through the switch assembly 4, the first load 6 is connected on the connection circuit between the switch assembly 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 on-off of the switch assembly 4, the boost circuit 5, the first battery pack 1 and the second battery pack 2 forms a comparison circuit, comprising:

[0010] The switch assembly 4 on both ends of the charging port 3 is controlled to be disconnected, the first battery pack 1 is controlled to be disconnected from the circuit, the second battery pack 2 is controlled to be connected to the circuit, and the bridge arm group 52 is controlled 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] 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 connected with 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 respectively, the first end of the charging port 3 is connected with the first end of the bridge arm group 52 and the first end of the second battery pack 2 through a positive sub-line 82 respectively, the second end of the charging port 3 is connected with 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 a negative main line 83 respectively, and the first switch 41, the second switch 42 and the third switch 43 are arranged on the positive sub-line 82, the positive main line 81 and the negative main line 83 respectively close to the charging port 3.

[0012] Optionally, the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, comprising:

[0013] In the case that 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 interval, it is determined that the first switch 41 and the second switch 42 are sintered;

[0014] After it is determined that the first switch 41 and the second switch 42 are sintered, in the case that 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 interval, it is determined that the first switch 41, the second switch 42 and the third switch 43 are sintered.

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

[0016] In a case where a 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 out of a preset interval, 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] In a case where a 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 interval, determining that the first switch 41 and the third switch 43 are sintered.

[0018] Optionally, the method further comprises:

[0019] controlling the switch assembly 4 across the charging port 3 to be disconnected, controlling the first battery pack 1 to be connected to the circuit, controlling the second battery pack 2 to be disconnected from the circuit, and controlling the bridge arm group 52 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, the charging port 3 is disconnected from the first battery pack 1 and the second battery pack 2, and a second comparison circuit is obtained.

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

[0021] In a case where a difference between the first voltage corresponding to the charging port 3 in the second comparison circuit and the third voltage corresponding to the first battery pack 1 is within a preset interval, determining that the second switch 42 and the third switch 43 are sintered.

[0022] Optionally, the method further comprises:

[0023] In a case where a difference between the first voltage corresponding to the charging port 3 in the second comparison circuit and the third voltage corresponding to the first battery pack 1 is out of a preset interval, based on the second comparison circuit, controlling the second switch 42 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, and a third comparison circuit is obtained.

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

[0025] In a case where a 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 interval, it is determined that the third switch 43 is sintered.

[0026] Optionally, the method further comprises:

[0027] In a case where a 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 interval, the second switch 42 is controlled to be opened, the third switch 43 is controlled to be closed, and the bridge arm group 52 is controlled to be continuously opened and closed based on the third comparison circuit, so that the second battery pack 2 is connected to the circuit, so that the second end of the charging port 3 is connected to the second end of the first battery pack 1, and a fourth comparison circuit is obtained.

[0028] The sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, and the sintering result of the switch assembly includes:

[0029] In a case where a 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 interval, it is determined that the second switch 42 is sintered.

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

[0031] In a case where a 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 outside the preset interval, 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 are compared.

[0032] In a case where a 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 interval, it is determined that the first switch 41 is sintered.

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

[0034] In a case where a 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 the preset interval, 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 the embodiments of the present disclosure, a controller is provided, comprising:

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

[0037] a processor configured to execute the computer program in the memory to cause the controller to perform the steps of the switch sintering detection method of the charging circuit according to the first aspect of the present disclosure.

[0038] According to a third aspect of the embodiments of the present disclosure, a vehicle is provided, comprising the charging circuit according to the first aspect of the present disclosure and the controller according to the second aspect of the present disclosure, the controller being connected to the charging circuit.

[0039] According to a fourth aspect of the embodiments of the present disclosure, a computer readable storage medium is provided, having stored thereon a computer program, which, when executed by a processor, implements the steps of the switch sintering detection method of the charging circuit according to the first aspect of the present disclosure.

[0040] Through the above technical solution, by controlling the on-off of the switch assembly, 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 assembly is determined according to the first comparison voltage and the second comparison voltage. Without adding any voltage sampling line, the sintering result of the switch assembly of the charging circuit can be determined, the structure can be simplified and the cost can be reduced.

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

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

[0043] Figure 1 is a structural schematic diagram of a charging circuit according to an exemplary embodiment.

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

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

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

[0047] Figure 5 FIG. 1 is a flow chart of a switch burn-in detection method of a charging circuit according to an exemplary embodiment.

[0048] Figure 6 FIG. 2 is a logic diagram of a switch burn-in detection method of a charging circuit according to an exemplary embodiment.

[0049] Figure 7 FIG. 3 is a block diagram of a controller according to an exemplary embodiment.

[0050] Figure 8 FIG. 4 is a block diagram of a vehicle according to an exemplary embodiment.

[0051] BEST MODE FOR CARRYING OUT THE INVENTION

[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 embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0054] Before introducing the switch burn-in detection method of the charging circuit of the present disclosure, a partial charging circuit to which the switch burn-in detection method of the charging circuit according to an exemplary embodiment of the present disclosure is applied will be introduced.

[0055] Figure 1 FIG. 1 is a structure diagram of a charging circuit according to an exemplary embodiment, Figure 2 FIG. 2 is a structure diagram of another charging circuit according to an exemplary embodiment, Figure 3 FIG. 3 is a structure diagram of still another charging circuit according to an exemplary embodiment, Figure 4 FIG. 4 is a structure diagram of yet another charging circuit according to an exemplary embodiment, and Figures 1 to 4As shown, in an exemplary embodiment, the charging circuit can 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 can 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 for boosting to charge the high-voltage battery pack, and the first load 6 can be a low-voltage load or a high-voltage load.

[0056] The first battery pack 1 and the second battery pack 2 can be connected to the charging port 3 through the switch assembly 4, so as to control the charging and discharging of the first battery pack 1 and the second battery pack 2 through 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, and the first battery pack 1 and the second battery pack 2 are connected through the boost circuit 5, so that the current from the first battery pack 1 or the charging port 3 can be boosted to charge the second battery pack 2. In a possible implementation, the charging circuit can further include a second load 7, which can be an electric drive system connected across 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. The first end of the charging port 3 leads out a positive main line 81 connected to the winding 51, and the other end of the winding 51 is connected to the midpoint of the bridge arm group 52; the positive sub-line 82 led out on the positive main line 81 is connected to the positive electrode of the second battery pack 2, and the second end of the charging port 3 leads out a negative main line 83 connected to the negative electrode of the second battery pack 2; the two ends of the bridge arm group 52 are connected to the positive sub-line 82 and the negative main line 83 respectively near one end of the second battery pack 2; the first switch 41, the second switch 42 and the third switch 43 are arranged on the positive sub-line 82, the positive main line 81 and the negative main line 83 respectively near the charging port 3; the positive electrode of the first battery pack 1 is connected to the positive 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 main line 83 between the third switch 43 and the second battery pack 2; the first end of the first load 6 is connected to the positive main line 81 between the second switch 42 and the winding 51, and the second end of the first load 6 is connected to the negative main line 83 between the third switch 43 and the second battery pack 2.

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

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

[0060] In a possible implementation, the second load 7 can be a multiphase motor, the multiphase motor comprising a plurality of phase arms and a plurality of windings, one end of the plurality of windings converging, the other end of the plurality of windings being connected at the midpoints of the plurality of phase arms respectively, and two ends of the plurality of phase arms being connected at two ends of the second battery pack 2 respectively.

[0061] In a possible implementation, the second battery pack 2 can comprise an upper half pack and a lower half pack, and the second load 7 can be a multiphase motor, the multiphase motor comprising a plurality of phase arms and a plurality of windings, one end of the plurality of windings converging and being connected between the upper half pack and the lower half pack, the other end of the plurality of windings being connected at the midpoints of the plurality of phase arms respectively, and two ends of the plurality of phase arms being connected at two ends of the second battery pack 2 respectively.

[0062] In a possible implementation, in the boost circuit 5, the winding 51 can be a plurality of windings, and the arm group 52 can be a plurality of phase arms, one end of the plurality of windings converging and being connected with the positive main line 81, the other end of the plurality of windings being connected at the midpoints of the plurality of phase arms respectively, and two ends of the plurality of phase arms being connected on the positive sub-line 82 and the negative main line 83 respectively.

[0063] Figure 5 is a flow chart of a switch welding detection method of a charging circuit according to an example embodiment, as shown in Figure 5 The method can be applied to a controller in a vehicle, the controller being connected with a switch assembly of a charging circuit, a boost circuit, a first battery pack, a second battery pack and a first load respectively, and the switch welding detection method of the charging circuit can comprise the following steps:

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

[0065] In the embodiment, the controller can control the on-off of the switch assembly, the boost circuit, the first battery pack and the second battery pack, specifically, the on-off of the switch assembly, 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, different comparison circuits can be obtained at different times, and at least one comparison circuit is formed.

[0066] In step S502, the welding result of the switch assembly is determined 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 a charging port and a second voltage corresponding to a first load, and the second comparison voltage comprising at least one of a third voltage corresponding to a first battery pack and a fourth voltage corresponding to a second battery pack.

[0067] In the embodiment, the first comparison voltage and the second comparison voltage can be obtained respectively, wherein the first comparison voltage can be 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 can be at least one of the third voltage corresponding to the first battery pack and the fourth voltage corresponding to the second battery pack, so as to determine the sintering result of the switch assembly according to 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 can be compared, and the sintering result of the switch assembly can be determined according to the comparison result, wherein the sintering result includes sintering and non-sintering.

[0069] By controlling the on-off of the switch assembly, the boost circuit, the first battery pack and the second battery pack, the 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, 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, and finally the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage, which can determine the sintering result of the switch assembly of the charging circuit without increasing any voltage sampling line, and can simplify the structure and reduce the cost.

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

[0071] controlling the switch assembly across the charging port to be disconnected, controlling the first battery pack to be disconnected from the circuit, controlling the second battery pack to be connected to the circuit, and controlling the bridge arm group to be closed, so that the charging port and the first load are disconnected from the first battery pack and the second battery pack, to obtain the first comparison circuit.

[0072] In the embodiment, in order not to affect the normal use of the vehicle, the sintering detection of the switch can be performed in the process of the vehicle power-off. That is, in response to the power-off instruction, the switch assembly can be controlled to be all disconnected, that is, the first switch, the second switch and the third switch are controlled to be disconnected, the first battery pack is controlled to be disconnected from the circuit, for example, the fourth switch and the fifth switch at both ends of the first battery pack are controlled to be disconnected, so that the first battery pack cannot output current, the second battery pack is controlled to be connected to the circuit, for example, the sixth switch and the seventh switch at both ends of the second battery pack are controlled to be connected, so that the second battery pack can output current, and the bridge arm group in the boost circuit is controlled to be all closed, that is, the upper bridge arm and the lower bridge arm in the boost circuit are controlled to be closed, so that no current can 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 interval, the sintering detection of the DC charging contactor in the current power-off process is ended, and then the second battery pack is controlled to be disconnected from the circuit. At this time, the first battery pack and the second battery pack are both disconnected from the circuit, that is, the power-off can be completed. Thus, the comparison circuit can be formed in the process of power-off, and no other connection line needs to be added, thereby saving cost.

[0073] In a possible implementation, the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, which can include:

[0074] In the case where 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 the preset interval, it is determined that the first switch and the second switch are sintered. After it is determined that the first switch and the second switch are sintered, in the case where 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, the second switch and the third switch are sintered.

[0075] In the embodiment, normally, 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 the 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, and the first switch and the second switch are sintered, so that the first load is in communication with 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 the preset interval, the first switch and the third switch are sintered, so that the charging port is in communication with the second battery pack, and 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 all sintered. Thus, the sintering result of the switch assembly can be determined without increasing the connection line, thereby saving the cost.

[0076] In a possible implementation, the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, and the method comprises the following steps.

[0077] In the case that 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 and the fourth voltage corresponding to the second battery pack are compared. In the case that 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 the 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 interval, the first switch and the second switch are not sintered at the same time, and the first load is not in communication with the second battery pack. The next step of diagnosis can be entered, the first voltage corresponding to the charging port in the first comparison circuit and the fourth voltage corresponding to the second battery pack are compared. 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 interval, the first switch and the third switch are sintered, so that the charging port is in communication with the second battery pack, and it can be determined that the sintering result of the switch assembly is that the first switch and the third switch are sintered. Thus, the comparison circuit can be formed in the process of discharging, and no other connection line is needed, thereby saving the cost.

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

[0080] The switch assembly is controlled to be disconnected, the first battery pack is controlled to be connected, the second battery pack is controlled to be disconnected, and the bridge arm group is controlled to be closed, so that the first load is connected with the first battery pack, the first load is disconnected with the second battery pack, and the charging port is disconnected with the first battery pack and the second battery pack, to obtain the second comparison circuit.

[0081] In the embodiment, the sintering result of the switch assembly can be determined during power-on to avoid affecting the normal use of the vehicle. Specifically, in response to a power-on instruction, the switch assembly is controlled to be disconnected, that is, the first switch is controlled to be disconnected, the second switch is controlled to be disconnected, and the third switch is controlled to be disconnected, the first battery pack is controlled to be connected, for example, the fourth switch and the fifth switch connected across the first battery pack are controlled to be closed, so that the first battery pack can output current, the second battery pack is controlled to be disconnected, for example, the sixth switch and the seventh switch connected across the second battery pack are controlled to be disconnected, so that the second battery pack cannot output current, and the bridge arm group in the boost circuit is controlled to be closed, that is, the upper bridge arm and the lower bridge arm in the boost circuit are controlled to be closed, so that current cannot pass through, to obtain the second comparison circuit. Thus, the second comparison circuit can be obtained by controlling during power-on of the vehicle, thereby avoiding additional connection lines and saving costs.

[0082] In a possible implementation, the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including:

[0083] In a case where a 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 within a preset interval, it is determined that the second switch and the third switch are sintered. Thus, the sintering result of the switch assembly can be determined without increasing connection lines, thereby saving costs.

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

[0085] In a case where a 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 interval, the second switch is controlled to be closed based on the second comparison circuit, so that the first end of the charging port is connected with the first end of the first battery pack, to obtain a third comparison circuit.

[0086] The sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including:

[0087] In a case where a 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 interval, it is determined that the third switch (43) is sintered.

[0088] In the 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 out of the preset interval, the second switch and the third switch are not sintered at the same time, the charging port is not communicated with the first battery pack, and the next step is entered. The controller judges whether the vehicle charging port cover is closed. If it is confirmed that it is closed, the second switch can be controlled to be closed based on the second comparison circuit, and the third comparison circuit is obtained. 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 in the preset interval, it can be determined that the sintering result of the switch assembly is that the third switch in the switch assembly is sintered. Thus, the sintering result of the switch assembly is determined without increasing the connection line, and the cost is saved.

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

[0090] 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 out of the preset interval, the second switch is controlled to be turned off, the third switch is controlled to be turned on, and the bridge arm group is controlled to be turned on and off continuously based on the third comparison circuit. The second battery pack communication circuit is controlled to make the second end of the charging port communicated with the second end of the first battery pack, and the fourth comparison circuit is obtained.

[0091] According to the first comparison voltage and the second comparison voltage in the comparison circuit, the sintering result of the switch assembly is determined, including:

[0092] 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 in the preset interval, it is determined that the second switch is sintered.

[0093] In the 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 out of the preset interval, the second switch and the third switch are not sintered at the same time, the charging port is not communicated with the first battery pack, and the next step is entered. The controller judges whether the vehicle charging port cover is closed. If it is confirmed that it is closed, the second switch can be controlled to be closed based on the second comparison circuit, and the third comparison circuit is obtained. 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 in the preset interval, it can be determined that the sintering result of the switch assembly is that the third switch in the switch assembly is sintered. Thus, the sintering result of the switch assembly is determined without increasing the connection line, and the cost is saved.

[0094] In a possible implementation, the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including:

[0095] In a case where a 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 out of a preset interval, 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; and in a case where a 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 interval, it is determined that the first switch is sintered.

[0096] In the embodiment, in a case where a 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 out of a preset interval, the second switch and the third switch are not sintered at the same time, the charging port is not in communication with the first battery pack, and the next step is entered, that is, 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; in a case where a 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 interval, the first switch is sintered, the charging port is in communication with the second battery pack, and the sintering result of the switch assembly is determined as that the first switch in the switch assembly is sintered. Thus, the sintering result of the switch assembly is determined without increasing the connection line, and cost is saved.

[0097] In a possible implementation, the sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including:

[0098] In a case where a 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 out of a preset interval, it is determined that the first switch, the second switch, and the third switch are not sintered.

[0099] In the embodiment, in a case where a 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 out of a preset interval, the sintering result of the switch assembly is determined as 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 increasing the connection line, and cost is saved.

[0100] In a possible implementation, before the second switch is controlled to be closed to obtain the third comparison circuit, the sintering detection method of the charging circuit further includes: confirming a closing state of the charging port cover, and in a case where the closing state of the charging port cover is the closed state, the second switch is controlled to be closed again to obtain the third comparison circuit, so as to avoid the risk of electric shock of the user.

[0101] In a case where the closing state of the charging port cover is the unclosed state, a prompt information is output, and the prompt information is used to prompt the user to close the charging port cover.

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

[0103] Figure 7 is a block diagram of a controller according to an example embodiment. Referring to Figure 7 , the controller 700 includes a processor 722, which can be one or more in number, and a memory 732 for storing a computer program executable by the processor 722. The computer program stored in the memory 732 can include one or more than one module each corresponding to a set of instructions. In addition, the processor 722 can be configured to execute the computer program to cause the controller 700 to perform the switch burn-in detection method of the charging circuit described above.

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

[0105] Figure 8 is a block diagram of a vehicle according to an example embodiment, as shown in Figure 8 In another example embodiment, a vehicle is also provided, which includes the controller and the charging circuit provided in the above embodiments, and the controller is connected to the charging circuit.

[0106] In another example embodiment, a computer readable storage medium including a computer program is also provided, which, when executed by a processor, implements the steps of the switch burn-in detection method of the charging circuit described above. For example, the computer readable storage medium can be the memory 732 described above including program instructions, and the computer program described above can be executed by the processor 722 of the controller 700 to complete the switch burn-in detection method of the charging circuit described above.

[0107] In another exemplary embodiment, there is also provided a computer program product comprising a computer program capable of being executed by a programmable apparatus, the computer program having code portions for performing the above-described method of switch burn-in detection for a charging circuit when executed by the programmable apparatus.

[0108] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical concepts of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0109] In addition, it should be noted that each of the various technical features described in the above specific embodiments can be combined in any appropriate manner as long as there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0110] In addition, any combination of the various different embodiments of the present disclosure can also be made as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed by the present disclosure.

Claims

1. A method for detecting the sintering of a charging circuit switch, characterized in that, The method comprises the following steps: controlling the on-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 assembly according to the first comparison voltage and the second comparison voltage in the comparison circuit, the first comparison voltage comprising at least one of the first voltage corresponding to the charging port (3) and the second voltage corresponding to the first load (6), and the second comparison voltage comprising at least one of the third voltage corresponding to the first battery pack (1) and the fourth voltage corresponding to the second battery pack (2); wherein the charging circuit comprises the first battery pack (1), the second battery pack (2), the charging port (3), the switch assembly (4), the boost circuit (5) and the first load (6), the first battery pack (1) and the second battery pack (2) are connected with the charging port (3) through the switch assembly (4), the first load (6) is connected on the connection circuit between the switch assembly (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); wherein 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 connected with the first end of the first load (6), the first end of the first battery pack (1) and the middle wire of the bridge arm group (52) through the positive main wire (81) respectively, the first end of the charging port (3) is connected with the first end of the bridge arm group (52) and the first end of the second battery pack (2) through the positive sub-wire (82) respectively, the second end of the charging port (3) is connected with 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 wire (83) respectively, and the first switch (41), the second switch (42) and the third switch (43) are arranged on the positive sub-wire (82), the positive main wire (81) and the negative main wire (83) respectively near the side of the charging port (3).

2. The switch sintering detection method of the charging circuit according to claim 1, wherein the control of the on-off of the switch assembly (4), the boost circuit (5), the first battery pack (1) and the second battery pack (2) forms a comparison circuit, comprising: controlling the switch assembly (4) at both ends of the charging port (3) to be disconnected, controlling the first battery pack (1) to be disconnected from the circuit, controlling the second battery pack (2) to be connected to the circuit, and controlling the bridge arm group (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.

3. The switch sintering detection method of the charging circuit according to claim 2, wherein ​ The method further comprises: In the case that 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 interval, it is determined that the first switch (41) and the second switch (42) are welded. In the case that 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 interval after it is determined that the first switch (41) and the second switch (42) are welded, it is determined that the first switch (41), the second switch (42) and the third switch (43) are welded.

4. The switch welding detection method of the charging circuit according to claim 2, wherein The method further comprises: In the case that 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 interval, it is determined that the first switch (41) and the second switch (42) are welded. In the case that 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 interval after it is determined that the first switch (41) and the second switch (42) are welded, it is determined that the first switch (41), the second switch (42) and the third switch (43) are welded.

5. The method of claim 2, wherein the method further comprises: The method further comprises: In the case that 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 interval, it is determined that the first switch (41) and the second switch (42) are welded.

6. The switch welding detection method of the charging circuit according to claim 5, wherein The method further comprises: In the case that the difference between the first voltage corresponding to the charging port (3) in the second comparison circuit and the third voltage corresponding to the first battery pack (1) is within a preset interval, it is determined that the second switch (42) and the third switch (43) are welded.

7. The method of claim 5, wherein the method further comprises: The method further comprises: In the case that the difference between the first voltage corresponding to the charging port (3) in the second comparison circuit and the third voltage corresponding to the first battery pack (1) is within a preset interval, it is determined that the second switch (42) and the third switch (43) are welded. The sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including: In the case that the difference between the first voltage corresponding to the charging port (3) in the third comparison circuit and the third voltage corresponding to the first battery pack (1) is within a preset interval, it is determined that the third switch (43) is sintered.

8. The method according to claim 7, wherein The method further comprises: In the case that the difference between the first voltage corresponding to the charging port (3) in the third comparison circuit and the third voltage corresponding to the first battery pack (1) is outside the preset interval, the second switch (42) is controlled to be opened, the third switch (43) is controlled to be closed, and the bridge arm group (52) is controlled to be continuously opened and closed based on the third comparison circuit, so that the second battery pack (2) is connected to the circuit, so that the second end of the charging port (3) is connected to the second end of the first battery pack (1), and a fourth comparison circuit is obtained. The sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including: In the case that 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 within a preset interval, it is determined that the second switch (42) is sintered.

9. The switch sintering detection method of the charging circuit according to claim 8, characterized in that, The sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including: In the case that the difference between the first voltage corresponding to the charging port (3) in the fourth comparison circuit and the fourth voltage corresponding to the second battery pack (2) is outside the preset interval, the first switch (41), the second switch (42) and the third switch (43) are all determined to be not sintered.

10. The switch sintering detection method of the charging circuit according to claim 9, characterized in that, The sintering result of the switch assembly is determined according to the first comparison voltage and the second comparison voltage in the comparison circuit, including: In the case that the difference between the first voltage corresponding to the charging port (3) in the fourth comparison circuit and the fourth voltage corresponding to the second battery pack (2) is outside the preset interval, the first switch (41), the second switch (42) and the third switch (43) are all determined to be not sintered. It comprises:

11. A controller characterized by comprising: A memory having a computer program stored thereon; A processor configured to execute the computer program in the memory to cause the controller to perform the steps of the switch sintering detection method of the charging circuit according to any one of claims 1-10. It comprises the charging circuit according to any one of claims 1-10, and the controller according to claim 11, wherein the controller is connected to the charging circuit.

12. A vehicle characterized by comprising: ​ 13. A computer readable storage medium having stored thereon a computer program, characterized in that The computer program, when executed by the processor, implements the steps of the switch burn-in detection method of the charging circuit according to any one of claims 1-10.

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