Charging mode selection circuit and electronic equipment

Abstract

The utility model discloses a charging mode selection circuit and electronic equipment, and belongs to the technical field of power electronics. The charging mode selection circuit comprises a battery module, a power module, a motor module, a fourth switch, a fifth switch and a sixth switch. The anode of the battery module is connected with the first end of the power module through a sixth switch, the cathode of the battery module is connected with the second end of the power module, and the power module is connected with the motor module; the first end of the fourth switch is connected with the positive electrode of the battery module, the first end of the fifth switch is connected with the power module and the motor module, the second end of the fourth switch and the second end of the fifth switch are connected with the positive electrode of the charging pile through the seventh switch, and the negative electrode of the charging pile is connected with the second end of the power module and the negative electrode of the battery module through the eighth switch. The technical problem of insufficient charging power of the direct current charging pile in the prior art is at least solved.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a charging mode selection circuit and electronic equipment. Background Art

[0002] With the development of battery technology, the current charging limit current of DC charging piles is much smaller than the maximum charging current that the battery can withstand.

[0003] When the battery voltage is low, due to the battery voltage and charging pile current limitations, using a DC charging pile to charge the battery will result in charging power far less than the maximum output power of the charging pile, limiting the charging rate and unnecessarily extending the charging time. Furthermore, as battery voltage levels continue to increase, low-voltage charging piles can no longer meet the charging needs of high-voltage battery packs. Utility Model Content

[0004] The main purpose of this application is to provide a charging mode selection circuit and electronic equipment, aiming to at least solve the technical problem of insufficient charging power of DC charging piles in the related art.

[0005] To achieve the above-mentioned object, the present application provides a charging mode selection circuit, which includes: a battery module, a power module, a motor module, a fourth switch, a fifth switch, and a sixth switch;

[0006] The positive electrode of the battery module is connected to the first end of the power module through the sixth switch, the negative electrode of the battery module is connected to the second end of the power module, and the power module is connected to the motor module;

[0007] The first end of the fourth switch is connected to the positive electrode of the battery module, the first end of the fifth switch is connected to the power module and the motor module respectively, the second end of the fourth switch and the second end of the fifth switch are connected to the positive electrode of the charging pile through the seventh switch, and the negative electrode of the charging pile is connected to the second end of the power module and the negative electrode of the battery module through the eighth switch.

[0008] In one embodiment, the battery module includes: a first switch, a second switch, a third switch, a first battery pack, and a second battery pack;

[0009] The two ends of the first switch are respectively connected to the positive electrode of the first battery pack and the positive electrode of the battery module, the two ends of the second switch are respectively connected to the positive electrode of the first battery pack and the negative electrode of the second battery pack, and the two ends of the third switch are respectively connected to the negative electrode of the second battery pack and the negative electrode of the battery module.

[0010] In one embodiment, the first switch, the third switch, and the sixth switch are closed, the second switch, the fourth switch, the fifth switch, the seventh switch, and the eighth switch are opened, and the operating mode of the charging mode selection circuit is a normal driving mode.

[0011] In one embodiment, the first switch, the third switch, the fourth switch, the seventh switch, and the eighth switch are closed, the second switch, the fifth switch, and the sixth switch are opened, and the operating mode of the charging mode selection circuit is a DC fast charging mode.

[0012] In one embodiment, the second switch, the fourth switch, the seventh switch, and the eighth switch are closed, and the first switch, the third switch, the fifth switch, and the sixth switch are opened, and the operating mode of the charging mode selection circuit is the boost power fast charging mode.

[0013] In one embodiment, the second switch, the fifth switch, the sixth switch, the seventh switch, and the eighth switch are closed, the first switch, the third switch, and the fourth switch are opened, and the operating mode of the charging mode selection circuit is a boost mode.

[0014] In one embodiment, the power module includes: a first capacitor and a three-phase bridge arm, wherein a first end of the first capacitor and a first end of the three-phase bridge arm are connected together to form a first end of the power module, and a second end of the first capacitor and a second end of the three-phase bridge arm are connected together to form a second end of the power module;

[0015] The three-phase bridge arm includes: a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube; the first switching tube and the second switching tube are connected in series to form the first bridge arm of the three-phase bridge arm, the third switching tube and the fourth switching tube are connected in series to form the second bridge arm of the three-phase bridge arm, and the fifth switching tube and the sixth switching tube are connected in series to form the third bridge arm of the three-phase bridge arm; the first end of the first switching tube, the first end of the third switching tube and the first end of the fifth switching tube are connected together to form the first end of the three-phase bridge arm, and the second end of the second switching tube, the second end of the fourth switching tube and the second end of the sixth switching tube are connected together to form the second end of the three-phase bridge arm; the midpoint of the first bridge arm is connected to the motor module, the midpoint of the second bridge arm is connected to the motor module, and the midpoint of the third bridge arm is connected to the motor module and the first end of the fifth switch.

[0016] In one embodiment, the motor module includes: a first winding, a second winding and a third winding, the first end of the first winding is connected to the midpoint of the first bridge arm, the first end of the second winding is connected to the midpoint of the second bridge arm, the first end of the third winding is connected to the midpoint of the third bridge arm, the second end of the first winding, the second end of the second winding and the second end of the third winding are connected in common, and the first end of the fifth switch is connected to the first end of the first winding or the first end of the second winding or the first end of the third winding.

[0017] In one embodiment, the second switch, the fifth switch, the sixth switch, the seventh switch, and the eighth switch are closed, the first switch, the third switch, and the fourth switch are opened, the first switch tube and the third switch tube are turned on, the second switch tube, the fourth switch tube, the fifth switch tube, and the sixth switch tube are turned off, and the operating mode of the charging mode selection circuit is the boost energy storage mode.

[0018] In one embodiment, the second switch, the fifth switch, the sixth switch, the seventh switch, and the eighth switch are closed, the first switch, the third switch, and the fourth switch are opened, the second switch tube and the fourth switch tube are turned on, the first switch tube, the third switch tube, the fifth switch tube, and the sixth switch tube are turned off, and the operating mode of the charging mode selection circuit is the boost freewheeling mode.

[0019] In addition, to achieve the above-mentioned purpose, the present application also provides an electronic device, which includes the charging mode selection circuit as described above.

[0020] The present application proposes a charging mode selection circuit and an electronic device, which overcome the problems in the related art. The charging mode selection circuit includes: a battery module, a power module, a motor module, a fourth switch, a fifth switch and a sixth switch; the positive pole of the battery module is connected to the first end of the power module through the sixth switch, the negative pole of the battery module is connected to the second end of the power module, and the power module is connected to the motor module; the first end of the fourth switch is connected to the positive pole of the battery module, the first end of the fifth switch is connected to the power module and the motor module respectively, the second end of the fourth switch and the second end of the fifth switch are connected to the positive pole of the charging pile through the seventh switch, and the negative pole of the charging pile is connected to the second end of the power module and the negative pole of the battery module through the eighth switch.

[0021] The charging mode selection circuit provided in the present application can change the working mode of the circuit by changing the on and off state of each switch. Under the premise of taking into account the conventional mode, not only can the voltage of the battery module and thus the charging power be increased by changing the connection method of the battery pack inside the battery module, but the charging power can also be further increased through the coordination of the power module and the motor module, thereby effectively improving the charging rate and shortening the charging time, so that the low-voltage charging pile can also meet the charging needs of the high-voltage battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the structure of a charging mode selection circuit provided in an embodiment of the present application;

[0024] Figure 2 Schematic diagram of the structure of a DC fast charging system;

[0025] Figure 3 A schematic diagram of the structure of a charging mode selection circuit after the battery module is refined according to an embodiment of the present application;

[0026] Figure 4 A schematic diagram of a charging mode selection circuit according to an embodiment of the present application operating in a normal driving mode;

[0027] Figure 5 A schematic diagram of a charging mode selection circuit according to an embodiment of the present application operating in a DC fast charging mode;

[0028] Figure 6 A schematic diagram of a charging mode selection circuit provided in an embodiment of the present application operating in a power-up fast charging mode;

[0029] Figure 7 A schematic diagram of a charging mode selection circuit according to an embodiment of the present application operating in a boost and power mode;

[0030] Figure 8 A schematic diagram of the structure of a charging mode selection circuit after the power module is refined according to an embodiment of the present application;

[0031] Figure 9 A detailed structural diagram of a charging mode selection circuit provided in an embodiment of the present application;

[0032] Figure 10 A schematic diagram of a charging mode selection circuit according to an embodiment of the present application operating in a boost energy storage mode;

[0033] Figure 11 A schematic diagram of a charging mode selection circuit provided in an embodiment of the present application operating in a boost freewheeling mode.

[0034] Description of Figure Numbers:

[0035] 10. Battery module; 20. Power module; 30. Motor module;

[0036] K1 to K8, first to eighth switches; E1, first battery pack; E2, second battery pack;

[0037] C1, the first capacitor; Q1 to Q6, the first to sixth switching tubes.

[0038] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which both A and B are satisfied.

[0042] In this application, unless otherwise specified or limited, the terms "connect" and "fix" should be understood in a broad sense. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] It should also be understood that references to "one embodiment" or "some embodiments" in the description of the embodiments of the present application mean that one or more embodiments of the embodiments of the present application include specific features, structures, or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and their variations all mean "including but not limited to," unless otherwise specifically emphasized.

[0044] With the increasing popularity of new energy electric vehicles, the demand for rapid recharging is growing. Currently, electric vehicle charging options primarily include AC charging stations and DC charging. DC charging, due to its high charging power and rapid recharging, has become the mainstream method for charging electric vehicles. Currently, DC charging for electric vehicles primarily involves connecting the charging station directly to the positive and negative terminals of the vehicle's battery via a main contactor. The charging voltage is the voltage between the positive and negative terminals of the battery pack, and the charging current is the charging current limited by the charging station.

[0045] With the advancement of battery technology, the current charging limit of DC charging piles is now far less than the maximum charging current that the battery can withstand. When the vehicle battery voltage is low, due to the battery voltage and the charging pile current limit, charging the battery with a DC charging pile will result in a charging power far less than the charging pile's maximum output power, which limits the charging rate and unnecessarily prolongs the charging time. Furthermore, as battery voltage levels continue to increase, low-voltage charging piles can no longer meet the charging needs of high-voltage battery packs.

[0046] Based on this, the embodiment of the present application proposes a charging mode selection circuit and electronic device, which overcomes the problem of insufficient charging power of DC charging piles in related technologies. The charging mode selection circuit provided by the embodiment of the present application can change the working mode of the circuit by changing the on and off of each switch. Under the premise of taking into account the conventional mode, not only can the voltage of the battery module be increased by changing the connection method of the battery pack inside the battery module, thereby increasing the charging power, but the charging power can also be further increased through the coordination of the power module and the motor module, thereby effectively improving the charging rate and shortening the charging time, so that the low-voltage charging pile can also meet the charging needs of the high-voltage battery pack.

[0047] The charging mode selection circuit and electronic device provided in the embodiments of the present application are specifically described through the following embodiments. First, the charging mode selection circuit is described.

[0048] The embodiment of the present application provides a charging mode selection circuit, referring to Figure 1 , Figure 1 This is a structural diagram of a charging mode selection circuit provided in one embodiment of the present application. The charging mode selection circuit includes: a battery module 10, a power module 20, a motor module 30, a fourth switch K4, a fifth switch K5, and a sixth switch K6;

[0049] The positive electrode of the battery module 10 is connected to the first end of the power module 20 through the sixth switch K6, the negative electrode of the battery module 10 is connected to the second end of the power module 20, and the power module 20 is connected to the motor module 30;

[0050] The first end of the fourth switch K4 is connected to the positive electrode of the battery module 10, the first end of the fifth switch K5 is connected to the power module 20 and the motor module 30 respectively, the second end of the fourth switch K4 and the second end of the fifth switch K5 are connected to the positive electrode of the charging pile through the seventh switch K7, and the negative electrode of the charging pile is connected to the second end of the power module 20 and the negative electrode of the battery module 10 through the eighth switch K8.

[0051] A DC fast charging system for a traditional electric vehicle Figure 2 As shown in the figure, when the vehicle needs to be charged, the main switch K0 between the battery and the electronic control needs to be disconnected; K10 and K20 are closed to connect the battery directly to the charging pile for charging. At this time, the charging current is limited by the charging pile, and the charging voltage is limited by the battery voltage. When the battery voltage is low and the charging pile limit current is low, the charging power is low.

[0052] In order to overcome the above-mentioned defects, the charging mode selection circuit proposed in this embodiment adds a switch at an appropriate position in the circuit and cooperates with different switch control logics, so that the circuit can take into account the normal driving mode in which the battery module 10 is connected to the power module 20, the DC fast charging mode in which the battery module 10 is directly connected to the charging pile, and the power-boosting fast charging mode in which the battery packs in the battery module 10 are connected in series to increase the charging voltage of the battery module 10 and thereby increase the charging power. It can also realize the power-boosting mode in which the charging power is further increased by combining the synergy of the power module 20 and the motor module 30.

[0053] Reference Figure 3 In some feasible embodiments, the battery module 10 may include: a first switch K1, a second switch K2, a third switch K3, a first battery group E1 and a second battery group E2;

[0054] The two ends of the first switch K1 are respectively connected to the positive electrode of the first battery pack E1 and the positive electrode of the battery module 10, the two ends of the second switch K2 are respectively connected to the positive electrode of the first battery pack E1 and the negative electrode of the second battery pack E2, and the two ends of the third switch K3 are respectively connected to the negative electrode of the second battery pack E2 and the negative electrode of the battery module 10.

[0055] It should be noted that in this embodiment, the battery module 10 is a multi-battery group parallel mode, and the combination of the first battery group E1, the second battery group E2, the first switch K1, the second switch K2 and the third switch K3 is only one example. On the basis of this embodiment, by adding more similar parallel battery groups and corresponding switches to obtain a technical solution for increasing the charging voltage with basically the same or similar principles, it should also fall within the scope of protection of this embodiment and will not be elaborated here.

[0056] Reference Figure 4 In some feasible embodiments, the first switch K1, the third switch K3, and the sixth switch K6 are closed, and the second switch K2, the fourth switch K4, the fifth switch K5, the seventh switch K7, and the eighth switch K8 are opened. The operating mode of the charging mode selection circuit is the normal driving mode. At this time, the current is output from the positive electrode of the battery module 10, passes through the sixth switch K6, the power module 20, the motor module 30, and the power module 20 in sequence, and then returns to the negative electrode of the battery module 10. That is, the battery module 10 (composed of the first battery pack E1 and the branch where the first switch K1 is located, and the second battery pack E2 and the branch where the third switch K3 are located in parallel), the sixth switch K6, the power module 20, and the motor module 30 form a loop.

[0057] In this embodiment, the charging mode selection circuit operates in the normal driving mode. Figure 4 It can be seen that in this mode, the battery module 10 is connected to the power module 20 , thereby supplying power to drive the motor module 30 .

[0058] Reference Figure 5 In some feasible embodiments, the first switch K1, the third switch K3, the fourth switch K4, the seventh switch K7, and the eighth switch K8 are closed, and the second switch K2, the fifth switch K5, and the sixth switch K6 are opened. The operating mode of the charging mode selection circuit is the DC fast charging mode. At this time, the current flows out from the positive electrode of the charging pile, passes through the seventh switch K7, the fourth switch K4, the battery module 10, and the eighth switch K8 in sequence, and then returns to the negative electrode of the charging pile. That is, the charging pile, the seventh switch K7, the fourth switch K4, the battery module 10 (composed of the first battery pack E1 and the branch where the first switch K1 is located, and the second battery pack E2 and the branch where the third switch K3 are located in parallel), and the eighth switch K8 form a loop.

[0059] In this embodiment, the charging mode selection circuit operates in the DC fast charging mode. Figure 5 It can be seen that in this mode, the battery module 10 is connected to the charging pile so that the charging pile performs DC fast charging on the battery module 10.

[0060] Reference Figure 6 In some feasible embodiments, the second switch K2, the fourth switch K4, the seventh switch K7, and the eighth switch K8 are closed, and the first switch K1, the third switch K3, the fifth switch K5, and the sixth switch K6 are opened. The operating mode of the charging mode selection circuit is the power-up fast charging mode. At this time, the current flows out from the positive electrode of the charging pile, passes through the seventh switch K7, the fourth switch K4, the battery module 10, and the eighth switch K8 in sequence, and then returns to the negative electrode of the charging pile. That is, the charging pile, the seventh switch K7, the fourth switch K4, the battery module 10 (composed of the second battery pack E2, the second switch K2, and the first battery pack E1 connected in series), and the eighth switch K8 form a loop.

[0061] In this embodiment, the charging mode selection circuit operates in the power-up fast charging mode. Figure 6 It can be seen that in this mode, the first battery pack E1 and the second battery pack E2 in the battery module 10 are connected in series through the closed second switch K2, so that the charging voltage of the battery module 10 is greater than the charging voltage when the battery packs are connected in parallel, thereby increasing the charging power without changing the charging pile.

[0062] Reference Figure 7In some feasible embodiments, the second switch K2, the fifth switch K5, the sixth switch K6, the seventh switch K7, and the eighth switch K8 are closed, and the first switch K1, the third switch K3, and the fourth switch K4 are opened. The operating mode of the charging mode selection circuit is the boost and power mode. At this time, the current flows out from the positive electrode of the charging pile, passes through the seventh switch K7, the fifth switch K5, the motor module 30, the power module 20, the sixth switch K6, the battery module 10, and the eighth switch K8 in sequence, and then returns to the negative electrode of the charging pile. That is, the charging pile, the seventh switch K7, the fifth switch K5, the motor module 30, the power module 20, the sixth switch K6, the battery module 10 (composed of the second battery pack E2, the second switch K2, and the first battery pack E1 connected in series), and the eighth switch K8 form a loop.

[0063] In this embodiment, the charging mode selection circuit operates in the boost mode. Figure 7 It can be seen that in this mode, the first battery group E1 and the second battery group E2 in the battery module 10 are connected in series through the closed second switch K2, and the charging pile forms a boost charging circuit with the battery module 10 through the motor module 30 and the power module 20. By adjusting the power module 20, the charging voltage of the battery module 10 can be further increased, thereby further increasing the charging power.

[0064] Reference Figure 8 In some feasible embodiments, the power module 20 may include: a first capacitor C1 and a three-phase bridge arm, wherein a first end of the first capacitor C1 and a first end of the three-phase bridge arm are connected together to form a first end of the power module 20, and a second end of the first capacitor C1 and a second end of the three-phase bridge arm are connected together to form a second end of the power module 20;

[0065] The three-phase bridge arm includes: a first switching tube Q1, a second switching tube Q2, a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5, and a sixth switching tube Q6; the first switching tube Q1 and the second switching tube Q2 are connected in series to form the first bridge arm of the three-phase bridge arm, the third switching tube Q3 and the fourth switching tube Q4 are connected in series to form the second bridge arm of the three-phase bridge arm, and the fifth switching tube Q5 and the sixth switching tube Q6 are connected in series to form the third bridge arm of the three-phase bridge arm. The first end of the first switching tube Q1, the first end of the third switching tube Q3, and the first end of the fifth switching tube Q5 are connected together to form the first end of the three-phase bridge arm, and the second end of the second switching tube Q2, the second end of the fourth switching tube Q4, and the second end of the sixth switching tube Q6 are connected together to form the second end of the three-phase bridge arm; the midpoint of the first bridge arm is connected to the motor module 30, the midpoint of the second bridge arm is connected to the motor module 30, and the midpoint of the third bridge arm is connected to the motor module 30 and the first end of the fifth switch K5.

[0066] In this embodiment, a circuit structure example of a power module 20 is provided.

[0067] It can be understood that the midpoint of the first bridge arm is formed by the second end of the first switch tube Q1 and the first end of the second switch tube Q2 being connected together, the midpoint of the second bridge arm is formed by the second end of the third switch tube Q3 and the first end of the fourth switch tube Q4 being connected together, and the midpoint of the third bridge arm is formed by the second end of the fifth switch tube Q5 and the first end of the sixth switch tube Q6 being connected together.

[0068] In this embodiment, each switching tube can be an IGBT (Insulate-Gate Bipolar Transistor), a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), or other switching devices with similar functions, which is not limited in this embodiment.

[0069] Reference Figure 9 In some feasible embodiments, the motor module 30 may include: a first winding, a second winding and a third winding, the first end of the first winding is connected to the midpoint of the first bridge arm, the first end of the second winding is connected to the midpoint of the second bridge arm, the first end of the third winding is connected to the midpoint of the third bridge arm, the second end of the first winding, the second end of the second winding and the second end of the third winding are connected in common, and the first end of the fifth switch K5 is connected to the first end of the first winding or the first end of the second winding or the first end of the third winding.

[0070] In this embodiment, a circuit structure example of a motor module 30 is provided based on the specific circuit structure example of the power module 20 provided in the above embodiment. It should be noted that: Figure 9 Only one connection mode is shown in which the first end of the fifth switch K5 is connected to the first end of the third winding. In actual application, the first end of the fifth switch K5 can be connected to any phase of the three-phase winding, that is, the first end of the fifth switch K5 can also be connected to the first end of the first winding or the first end of the second winding.

[0071] Reference Figure 10In some feasible embodiments, the second switch K2, the fifth switch K5, the sixth switch K6, the seventh switch K7, and the eighth switch K8 are closed, the first switch K1, the third switch K3, and the fourth switch K4 are opened, the first switch Q1 and the third switch Q3 are turned on, and the second switch Q2, the fourth switch Q4, the fifth switch Q5, and the sixth switch Q6 are turned off. The operating mode of the charging mode selection circuit is the boost energy storage mode. At this time, the current flows from the positive electrode of the charging pile, passes through the seventh switch K7, the fifth switch K5, the three-phase winding of the motor module 30, the first switch Q1 and the third switch Q3, the sixth switch K6, the battery module 10, and the eighth switch K8 in sequence, and then returns to the negative electrode of the charging pile. That is, the charging pile, the seventh switch K7, the fifth switch K5, the three-phase winding of the motor module 30, the first switch Q1 and the third switch Q3, the sixth switch K6, the battery module 10 (composed of the second battery pack E2, the second switch K2, and the first battery pack E1 in series), and the eighth switch K8 form a loop.

[0072] In this embodiment, the charging mode selection circuit operates in the boost energy storage mode. Figure 10 It can be seen that in this mode, the first battery pack E1 and the second battery pack E2 in the battery module 10 are connected in series through the closed second switch K2, and the charging pile forms a boost charging circuit with the battery module 10 through the motor module 30 and the power module 20. By adjusting the upper bridge of the first bridge arm and the second bridge arm in the power module 20, that is, the first switch tube Q1 and the third switch tube Q3 are turned on, and the other switch tubes are turned off, the inductive energy storage of the boost charging circuit can be achieved ( Figure 10 The current path is identified and the rest is de-emphasized).

[0073] Reference Figure 11In some feasible embodiments, the second switch K2, the fifth switch K5, the sixth switch K6, the seventh switch K7, and the eighth switch K8 are closed, the first switch K1, the third switch K3, and the fourth switch K4 are opened, the second switch tube Q2 and the fourth switch tube Q4 are turned on, the first switch tube Q1, the third switch tube Q3, the fifth switch tube Q5, and the sixth switch tube Q6 are turned off, and the operating mode of the charging mode selection circuit is the boost freewheeling mode. At this time, a current flows out from the positive electrode of the charging pile, passes through the seventh switch K7, the fifth switch K5, the three-phase winding of the motor module 30, the second switch K1, the third switch K3, the fifth switch Q5, and the sixth switch Q6 in sequence. The current flows out from the first end of the first capacitor C1, passes through the sixth switch K6 and the battery module 10 in sequence, and returns to the second end of the first capacitor C1. That is, the first capacitor C1, the sixth switch K6, and the battery module 10 (composed of the second battery pack E2, the second switch K2, and the first battery pack E1 connected in series) form another loop.

[0074] In this embodiment, the charging mode selection circuit operates in the boost freewheeling mode. Figure 11 It can be seen that in this mode, the first battery pack E1 and the second battery pack E2 in the battery module 10 are connected in series through the closed second switch K2, and the charging pile forms a boost charging circuit with the battery module 10 through the motor module 30 and the power module 20. By adjusting the lower bridges of the first bridge arm and the second bridge arm in the power module 20, that is, the second switch tube Q2 and the fourth switch tube Q4 are turned on, and the other switch tubes are turned off, the inductive freewheeling of the boost charging circuit can be achieved ( Figure 11 The current path is marked and the rest is faded). Charging at this time can break through the current limit of the charging pile and significantly increase the charging power.

[0075] In addition, an embodiment of the present application further provides an electronic device, which includes the charging mode selection circuit provided in the above embodiment.

[0076] In this embodiment, the electronic device may be an on-board charging device, a vehicle, or other electronic devices equipped with the charging mode selection circuit provided in the above embodiment, and this embodiment does not limit this.

[0077] Since the electronic device proposed in this embodiment includes the charging mode selection circuit proposed in the above embodiments, it has the beneficial effects of the above embodiments. The specific working process and principle of the charging mode selection circuit are detailed in the charging mode selection circuits provided in the above embodiments, which will not be described here one by one, and are all within the protection scope of this embodiment.

[0078] It should be noted that the technical solutions of the various embodiments of the present application can be combined with each other, but this must be based on the fact that they can be implemented by technical personnel in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0079] The above are merely optional embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A charging mode selection circuit, characterized in that: include: a battery module, a power module, a motor module, a fourth switch, a fifth switch, and a sixth switch; The positive electrode of the battery module is connected to the first end of the power module through the sixth switch, the negative electrode of the battery module is connected to the second end of the power module, and the power module is connected to the motor module; The first end of the fourth switch is connected to the positive electrode of the battery module, the first end of the fifth switch is connected to the power module and the motor module respectively, the second end of the fourth switch and the second end of the fifth switch are connected to the positive electrode of the charging pile through the seventh switch, and the negative electrode of the charging pile is connected to the second end of the power module and the negative electrode of the battery module through the eighth switch.

2. The charging mode selection circuit according to claim 1, wherein: The battery module includes: a first switch, a second switch, a third switch, a first battery pack and a second battery pack; The two ends of the first switch are respectively connected to the positive electrode of the first battery pack and the positive electrode of the battery module, the two ends of the second switch are respectively connected to the positive electrode of the first battery pack and the negative electrode of the second battery pack, and the two ends of the third switch are respectively connected to the negative electrode of the second battery pack and the negative electrode of the battery module.

3. The charging mode selection circuit according to claim 2, wherein: The first switch, the third switch, and the sixth switch are closed, the second switch, the fourth switch, the fifth switch, the seventh switch, and the eighth switch are opened, and the operating mode of the charging mode selection circuit is a normal driving mode.

4. The charging mode selection circuit according to claim 2, wherein: The first switch, the third switch, the fourth switch, the seventh switch, and the eighth switch are closed, the second switch, the fifth switch, and the sixth switch are opened, and the operating mode of the charging mode selection circuit is the DC fast charging mode.

5. The charging mode selection circuit according to claim 2, wherein: The second switch, the fourth switch, the seventh switch, and the eighth switch are closed, and the first switch, the third switch, the fifth switch, and the sixth switch are opened. The operating mode of the charging mode selection circuit is the power-up fast charging mode.

6. The charging mode selection circuit according to claim 2, wherein: The second switch, the fifth switch, the sixth switch, the seventh switch, and the eighth switch are closed, the first switch, the third switch, and the fourth switch are opened, and the operation mode of the charging mode selection circuit is a boost mode.

7. The charging mode selection circuit according to any one of claims 2 to 6, wherein: The power module includes: a first capacitor and a three-phase bridge arm, wherein the first end of the first capacitor and the first end of the three-phase bridge arm are connected together to form the first end of the power module, and the second end of the first capacitor and the second end of the three-phase bridge arm are connected together to form the second end of the power module; The three-phase bridge arm includes: a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube; the first switching tube and the second switching tube are connected in series to form the first bridge arm of the three-phase bridge arm, the third switching tube and the fourth switching tube are connected in series to form the second bridge arm of the three-phase bridge arm, and the fifth switching tube and the sixth switching tube are connected in series to form the third bridge arm of the three-phase bridge arm; the first end of the first switching tube, the first end of the third switching tube and the first end of the fifth switching tube are connected together to form the first end of the three-phase bridge arm, and the second end of the second switching tube, the second end of the fourth switching tube and the second end of the sixth switching tube are connected together to form the second end of the three-phase bridge arm; the midpoint of the first bridge arm is connected to the motor module, the midpoint of the second bridge arm is connected to the motor module, and the midpoint of the third bridge arm is connected to the motor module and the first end of the fifth switch.

8. The charging mode selection circuit according to claim 7, wherein: The motor module includes: a first winding, a second winding and a third winding, the first end of the first winding is connected to the midpoint of the first bridge arm, the first end of the second winding is connected to the midpoint of the second bridge arm, the first end of the third winding is connected to the midpoint of the third bridge arm, the second end of the first winding, the second end of the second winding and the second end of the third winding are connected in common, and the first end of the fifth switch is connected to the first end of the first winding or the first end of the second winding or the first end of the third winding.

9. The charging mode selection circuit according to claim 8, wherein: The second switch, the fifth switch, the sixth switch, the seventh switch, and the eighth switch are closed, the first switch, the third switch, and the fourth switch are opened, the first switch tube and the third switch tube are turned on, the second switch tube, the fourth switch tube, the fifth switch tube, and the sixth switch tube are turned off, and the operating mode of the charging mode selection circuit is the boost energy storage mode.

10. The charging mode selection circuit according to claim 8, wherein: The second switch, the fifth switch, the sixth switch, the seventh switch, and the eighth switch are closed, the first switch, the third switch, and the fourth switch are opened, the second switch tube and the fourth switch tube are turned on, the first switch tube, the third switch tube, the fifth switch tube, and the sixth switch tube are turned off, and the operating mode of the charging mode selection circuit is the boost freewheeling mode.

11. An electronic device, characterized in that: The electronic device includes the charging mode selection circuit according to any one of claims 1 to 10.

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