Energy storage assembly heating system and electric device

Abstract

The embodiment of the utility model provides an energy storage assembly heating system and an electric device, and relates to the technical field of energy storage. The first energy storage assembly and the second energy storage assembly are connected at a first node; two ends of the first line are respectively connected with the bridge arm converter and the second energy storage assembly, and two ends of the second line are respectively connected with the bridge arm converter and the first energy storage assembly; a first switch unit is arranged in the first line and / or the second line; the first end of the inductor is connected with the bridge arm converter, and the second end is connected with the first node through the second switch unit; and the control unit controls the first switch unit, the second switch unit and the bridge arm converter, so that the first energy storage assembly charges the second energy storage assembly by using the inductor and / or the second energy storage assembly charges the first energy storage assembly by using the inductor. The heating efficiency and the heating effect of the energy storage assembly can be improved, and the cost is saved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a heating system for an energy storage component and an electrical device. Background Technology

[0002] With the development of new energy technologies, energy storage devices are being used more and more widely, including energy storage modules. However, in low-temperature environments, the performance of energy storage modules decreases significantly compared to normal temperatures. For example, at zero-point temperature, the discharge capacity of energy storage modules decreases as the temperature decreases; when energy storage modules discharge under low-temperature conditions, their capacity will decrease, and they may even suffer irreversible damage. To enable the use of energy storage modules in low-temperature environments, they need to be heated. In related technologies, a heating system for energy storage modules can be composed of bridge arm converters and energy storage elements. By controlling the bridge arm converter, the energy storage modules and energy storage elements are charged and discharged to heat the energy storage modules. Although existing energy storage module heating systems can achieve self-heating of energy storage modules, the self-heating efficiency is low, the energy loss of energy storage elements is large, and the thermal risk of energy storage elements is high, making it impossible to generate a large current, resulting in poor heating effect. Utility Model Content

[0003] In view of the above problems, this application provides a heating system for energy storage components and an electrical device to improve the efficiency and effect of heating energy storage components.

[0004] According to a first aspect of this disclosure, an energy storage component heating system is provided, comprising: an energy storage device, a power distribution module, an inductor, a motor controller, a first switching unit, a second switching unit, and a control unit; the energy storage device includes a first energy storage component and a second energy storage component, the motor controller includes a bridge arm converter, and the power distribution module includes a first line and a second line; the positive terminal of the first energy storage component is connected to the negative terminal of the second energy storage component at a first node; the two ends of the first line are respectively connected to a first end of the bridge arm converter and the positive terminal of the second energy storage component, and the two ends of the second line are respectively connected to a second end of the bridge arm converter and the negative terminal of the first energy storage component; a first switching unit is provided in the first line and / or the second line; a first end of the inductor is connected to a third end of the bridge arm converter, and a second end of the inductor is connected to the first node through the second switching unit; the control unit is configured to control the first switching unit, the second switching unit, and the bridge arm converter to cause the first energy storage component to charge the second energy storage component using the inductor and / or the second energy storage component to charge the first energy storage component using the inductor. The energy storage components or devices described in this disclosure may be batteries or battery packs.

[0005] In this embodiment, the energy storage components are divided into a first energy storage component and a second energy storage component. The control unit can enter either an electric drive mode or a heating mode by controlling the first switching unit, the second switching unit, and the bridge arm converter. In the heating mode, the first energy storage component can charge the second energy storage component using an inductor, and / or the second energy storage component can charge the first energy storage component using an inductor. Due to the internal resistance of the first and second energy storage components, the first and / or second energy storage components can generate heat and rise in temperature, achieving self-heating of the energy storage components. The control unit can generate an oscillating current by controlling the bridge arm converter. Since no other energy storage elements are used, the oscillating current can be a large current, which can improve the heating efficiency, safety, and heating effect of the energy storage components. During the self-heating process, the electric drive does not generate torque, and the noise, vibration, and harshness (NVH) performance of the electric drive is good. By utilizing inductors, motor controllers, and other devices, costs are saved.

[0006] In some embodiments, the bridge arm converter includes three bridge arm branches, each bridge arm branch including an upper bridge arm switch unit and a lower bridge arm switch unit connected in series, the upper bridge arm switch unit and the lower bridge arm switch unit being electrically connected through a second node; wherein, the first ends of the three bridge arm branches are jointly connected to form the first end of the bridge arm converter, the second ends of the three bridge arm branches are jointly connected to form the second end of the bridge arm converter; the third end of the bridge arm converter includes the second node in the bridge arm branch.

[0007] In this embodiment, the first and second ends of the three bridge arm branches of the bridge arm converter are connected together to form an external connection terminal. The third end of the bridge arm converter includes the second node in the bridge arm branch. The control unit can generate an oscillating current by controlling the three bridge arm branches of the bridge arm converter, thereby improving the heating efficiency. By utilizing the three bridge arm branches of the bridge arm converter, costs are saved.

[0008] In some embodiments, the inductor includes three inductors; wherein each inductor corresponds one-to-one with a bridge arm branch, and the first end of each inductor is connected to the second node in the corresponding bridge arm branch; the second ends of the three inductors are connected together to form a neutral point, which serves as the second end of the inductor.

[0009] In this embodiment, a neutral point is formed by connecting one end of three inductors together to connect the first node between the first energy storage component and the second energy storage component. The other ends of the three inductors are respectively connected to the nodes in the corresponding bridge arm branches. By matching the inductors with the bridge arm converter, electrical energy can be stored and released for charging. By utilizing inductors, costs are reduced.

[0010] In some embodiments, the first terminal of each inductor is connected to the second node in the corresponding bridge arm branch via a resistor.

[0011] In some embodiments, the system includes a first fuse; the first fuse is disposed in the connection line between the second switching unit and the first node, or in the second line.

[0012] In this embodiment, by setting a first fuse, the connection line between the second switching unit and the first node, or the second line, can be protected, thereby improving the safety of the energy storage component heating and ensuring the safety of the energy storage device.

[0013] In some embodiments, the first fuse is integrated in the energy storage device or the power distribution module.

[0014] In this embodiment, the first fuse can be integrated into components such as energy storage devices or power distribution modules. Different components can be manufactured by different manufacturers, which can significantly improve production efficiency, ensure product quality, and reduce production costs.

[0015] In some embodiments, a second fuse is disposed in the first circuit.

[0016] In this embodiment, by setting a second fuse, the first line can be protected, thus ensuring the safety of the energy storage device.

[0017] In some embodiments, the second switching module is integrated into the energy storage device, the motor, or the power distribution module.

[0018] In this embodiment, the second switch module can be integrated into components such as energy storage devices, power distribution modules, or motors. Different components can be manufactured by different manufacturers, which can significantly improve production efficiency, ensure product quality, and reduce production costs.

[0019] In some embodiments, the power distribution module includes: a pre-charging circuit; the pre-charging circuit is connected in parallel with the first switching unit, and the pre-charging circuit includes: a resistor and a third switching unit.

[0020] In this embodiment, by setting a pre-charging circuit, the peak charging current can be limited, thus providing protection.

[0021] According to a second aspect of this disclosure, an electrical device is provided, comprising: an energy storage component heating system as described above.

[0022] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the accompanying drawings without creative effort.

[0024] Figure 1 A schematic diagram of some embodiments of the energy storage component heating system disclosed herein;

[0025] Figure 2 This is a circuit diagram of a first embodiment of the energy storage component heating system disclosed herein;

[0026] Figure 3 This is a circuit diagram of a second embodiment of the energy storage component heating system disclosed herein;

[0027] Figure 4 This is a circuit diagram of a third embodiment of the energy storage component heating system disclosed herein;

[0028] Figure 5 This is a circuit diagram of a fourth embodiment of the energy storage component heating system disclosed herein;

[0029] Figure 6 This is a circuit diagram of a fifth embodiment of the energy storage component heating system disclosed herein;

[0030] Figure 7 This is a circuit diagram of a sixth embodiment of the energy storage component heating system disclosed herein;

[0031] Figure 8 This is a circuit diagram of a seventh embodiment of the energy storage component heating system disclosed herein;

[0032] Figure 9 This is a schematic diagram of the current flow in the first stage of in-phase control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure.

[0033] Figure 10 This is a schematic diagram of the current flow in the second stage of in-phase control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure.

[0034] Figure 11This is a schematic diagram of the current flow in the third stage of in-phase control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure.

[0035] Figure 12 This is a schematic diagram of the current flow in the fourth stage of in-phase control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure.

[0036] Figures 13A-13C This is a schematic diagram of the current flow in the first stage of phase misalignment control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure.

[0037] Figures 14A-14C This is a schematic diagram of the current flow in the second stage of phase misalignment control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure.

[0038] Figures 15A-15C This is a schematic diagram of the current flow in the third stage of phase misalignment control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure.

[0039] Figures 16A-16C This is a schematic diagram of the current flow in the fourth stage of phase misalignment control of the bridge arm converter in some embodiments of the energy storage component heating system of this disclosure. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least some of the embodiments of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0046] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] In some embodiments, such as Figure 1As shown, this disclosure provides a heating system for an energy storage component, including an energy storage device 10, an energy distribution module 20, an inductor 41, a motor controller 40, a first switching unit 21, a second switching unit 51, and a control unit 60. The motor controller 30 includes a bridge arm converter 31, which can be a three-phase bridge arm converter or other types of bridge arm converters. The inductor 41 can be a motor inductor, etc.; the energy distribution module 20 can be a high-voltage distribution box, etc., and includes a first line 22 and a second line 23. The energy storage component or energy storage device described in this disclosure can be a battery or a battery pack.

[0049] The energy storage device 10 can be of various types, including a first energy storage component 11 and a second energy storage component 12; the first energy storage component 11 and the second energy storage component 12 can be a battery pack or a battery, etc. The positive terminal of the first energy storage component 11 and the negative terminal of the second energy storage component 12 are connected at the first node P11, and the first energy storage component 11 and the second energy storage component 12 are connected in series.

[0050] The two ends of the first line 22 are connected to the first terminal P31 of the bridge arm converter 31 and the positive terminal of the second energy storage component 12, respectively. The two ends of the second line 23 are connected to the second terminal P32 of the bridge arm converter 31 and the negative terminal of the first energy storage component 11, respectively. A first switching unit 21 is provided in the first line 22, and a first switching unit 21 can also be provided in the second line 23. The first switching unit 21 can be various electric switches, relays, etc.

[0051] The motor 40 can be of various types, and the motor 40 includes an inductor 41, which can be a three-phase inductor or other types of inductors. The first end of the inductor 41 is connected to the third end P33 of the bridge arm converter 31, and the second end of the inductor 41 is connected to the first node P11 through the second switching unit 51.

[0052] The control unit 60 can be a standalone unit, or it can be integrated into the motor controller 30, VCU (Vehicle Control Unit), main control unit, or other devices. The control unit 60 is configured to control the first switching unit 21, the second switching unit 51, and the bridge arm converter 31 to enable the first energy storage component 11 to charge the second energy storage component 12 via the inductor 41 and / or the second energy storage component 12 to charge the first energy storage component 11 via the inductor 41.

[0053] By dividing the energy storage components in the energy transmission device 10 into a first energy storage component 11 and a second energy storage component 12, the control unit 60 can enter either an electric drive mode or a heating mode by controlling the first switching unit 21, the second switching unit 51, and the bridge arm converter 31. In the heating mode, the first energy storage component 11 can charge the second energy storage component 12 using the inductor 41, and / or the second energy storage component 12 can charge the first energy storage component 11 using the inductor 41. Since the first energy storage component 11 and the second energy storage component 12 have internal resistance, the first energy storage component 11 and / or the second energy storage component 12 can generate heat and rise in temperature during charging. Self-heating is achieved; by controlling the bridge arm converter 31, an oscillating current can be generated in the first energy storage component 11 and the second energy storage component 12. The oscillating current can be a pulse current, and since no energy storage element is used, the oscillating current can be a large current, which can improve the heating efficiency and safety of the first energy storage component 11 and the second energy storage component 12; during the self-heating process of the first energy storage component 11 and the second energy storage component 12, the electric drive does not generate torque, and the noise, vibration and comfort performance of the electric drive are good; by utilizing devices such as the inductor 41 and the bridge arm converter 31, since the inductor 41 and the bridge arm converter 31 are existing devices, costs are saved.

[0054] like Figure 2 As shown, the bridge arm converter 31 includes three bridge arm branches: bridge arm branch 311, bridge arm branch 312, and bridge arm branch 313. Each of the bridge arm branches 311, 312, and 313 includes an upper bridge arm switch unit and a lower bridge arm switch unit connected in series. The upper and lower bridge arm switch units can have various structures.

[0055] The upper bridge arm switching unit of bridge arm branch 311 includes a field-effect transistor V1 and a diode D1, and the lower bridge arm switching unit of bridge arm branch 311 includes a field-effect transistor V4 and a diode D4; the upper bridge arm switching unit of bridge arm branch 312 includes a field-effect transistor V2 and a diode D2, and the lower bridge arm switching unit of bridge arm branch 312 includes a field-effect transistor V5 and a diode D5; the upper bridge arm switching unit of bridge arm branch 313 includes a field-effect transistor V3 and a diode D3, and the lower bridge arm switching unit of bridge arm branch 313 includes a field-effect transistor V6 and a diode D6.

[0056] Field-effect transistors V1-V6 can be used as switching transistors. Besides field-effect transistors, other transistors with switching functions can also be used as switching transistors. The control unit 60 controls the field-effect transistors V1-V6 to turn on or off by sending control signals to the field-effect transistors V1-V6, including on or off signals.

[0057] The first ends of bridge arm branches 311, 312, and 313 are connected together to form the first end P31 of the bridge arm converter 31; the second ends of bridge arm branches 311, 312, and 313 are connected together to form the second end P32 of the bridge arm converter 31. The positive terminal of the first energy storage component 11 and the negative terminal of the second energy storage component 12 are connected to the first node P11. The two ends of the first line 22 are respectively connected to the first end P31 of the bridge arm converter 31 and the positive terminal of the second energy storage component 12. The two ends of the second line 23 are respectively connected to the second end P32 of the bridge arm converter 31 and the negative terminal of the first energy storage component 11. The motor controller 30 includes a capacitor C1, the two ends of which are respectively connected to the first end P31 and the second end P32 of the bridge arm converter 31. The control unit 60 controls the arm converter 31 to generate an oscillating current, which can be used to heat the energy storage components. By utilizing the arm branches 311, 312 and 313, costs can be reduced and heating efficiency can be improved.

[0058] The upper and lower bridge arm switching units of bridge arm branch 311 are electrically connected through the second node P33, the upper and lower bridge arm switching units of bridge arm branch 312 are electrically connected through the second node P34, and the upper and lower bridge arm switching units of bridge arm branch 313 are electrically connected through the second node P35; the third terminal of bridge arm converter 31 includes the second node P33 in bridge arm branch 311, the second node P34 in bridge arm branch 312, and the second node P35 in bridge arm branch 313.

[0059] Inductor 41 includes three inductors: L1, L2, and L3. Inductors L1, L2, and L3 correspond one-to-one with bridge arm branches 313, 312, and 311, respectively. Motor 40 includes three resistors: R1, R2, and R3. The first terminal of inductor 41 includes the first terminal of inductor L1, the first terminal of inductor L2, and the first terminal of inductor L3. The first terminal of inductor L1 is connected to the second node P35 in the corresponding bridge arm branch 313 via resistor R1; the first terminal of inductor L2 is connected to the second node P34 in the corresponding bridge arm branch 312 via resistor R2; and the first terminal of inductor L3 is connected to the second node P33 in the corresponding bridge arm branch 311 via resistor R3. The second ends of inductors L1, L2 and L3 are connected together to form a neutral point, which serves as the second end of inductor 41. The second end of inductor 41 is connected to the first node P11 through a second switching unit, which is a relay S1.

[0060] By connecting one end of the three inductors of inductor 41 to form a neutral point, which is used to connect the first node P11 between the first energy storage component 11 and the second energy storage component 12, the vector sum of the three-phase currents of inductor 41 can be made zero, avoiding the generation of large torque on the motor. Inductor 41 can be matched with bridge arm converter 31 to generate oscillating current by storing and releasing electrical energy to heat the energy storage component. By using inductor 41, costs can be reduced and heating efficiency can be improved.

[0061] First switching units are respectively provided in the first line 22 and the second line 23. The first switching unit in the first line 22 is relay S3, and the first switching unit in the second line 23 is relay S2. The control unit 60 controls the first switching unit, the second switching unit, and the bridge arm converter to enter either electric drive mode or heating mode. For example, the control unit 60 controls relays S3 and S2 to close and controls relay S1 to open, entering electric drive mode, i.e., non-heating mode. In this mode, there is no high-voltage current in the connection between the neutral point of inductor 41 and the first node P11.

[0062] Control unit 60 controls relays S3 and S2 to close, and controls relay S1 to close, entering heating mode, i.e., non-electric drive mode; it can also enter heating mode when the vehicle is stopped. In heating mode, control unit 60 controls the upper and lower axle arm switching units of axle arm branches 311, 312, and 313 to be in a conducting or disconnected state, so that the first energy storage component 11 charges the second energy storage component 12 using inductor 41 and / or the second energy storage component 12 charges the first energy storage component 11 using inductor 41. By controlling the upper and lower axle arm switching units of axle arm branches 311, 312, and 313 to be in a conducting or disconnected state, control unit 60 can generate oscillating current, realizing self-heating of the energy storage component and improving the heating efficiency of the energy storage component.

[0063] The first fuse 52 can be installed in the connection line between the relay S1 and the first node P11. The first fuse 52 can be of various types and can be integrated into devices such as the energy storage device 10. The first fuse 52 can disconnect after the current is too high and held for a period of time, providing protection for the circuit, improving the safety of the energy storage component's self-heating, and ensuring the safety of the energy storage component. The first fuse 52 can be integrated into different components, which can be produced by different manufacturers, thus significantly improving production efficiency, ensuring product quality, and reducing production costs.

[0064] The second fuse 24 can be installed in the first circuit 22, and the second fuse 24 can be of various types. By installing the second fuse 24, the second fuse 24 can disconnect after the current in the first circuit 22 is too high and remains so for a period of time, providing protection for the circuit and ensuring the safety of the energy storage component.

[0065] The relay S1 can be integrated into components such as the energy storage device 10, the motor 40, or the power distribution module 20. The relay S1 can be integrated into different components, which can be manufactured by different companies, thus significantly improving production efficiency, ensuring product quality, and reducing production costs.

[0066] The power distribution module 20 includes a pre-charging circuit connected in parallel with relay S3. The pre-charging circuit includes a resistor R4 and a third switching unit. The third switching unit can be various electric switches or relays, for example, relay 25. Resistor R4 and relay 25 are connected in series to form the pre-charging circuit. By setting up the pre-charging circuit, the peak current during charging can be limited, providing protection. During pre-charging, relay 25 is closed, and the peak charging current is limited by resistor R4 to prevent excessive current, thus providing protection, improving safety, and extending the service life of the energy storage component. Under normal charging conditions, relay 25 is disconnected.

[0067] In some embodiments, such as Figure 3 As shown, the energy storage component heating system may also include a BMS (Battery Management System) 70 and a VCU 80. The control unit 60 can be set independently, or the control unit 60 can be integrated into the motor controller 30. The BMS 70 can collect parameter information from the energy storage device 10, the power distribution module 20, the motor controller 30, the motor 40, etc. The parameter information may include the voltage, current, and temperature information of the first energy storage component 11 and the second energy storage component 12, as well as the status information of relays S2 and S3.

[0068] The control unit 60, BMS 70, motor controller 30, motor 40, and VCU 80 can be connected via a CAN bus for real-time communication. The VCU 80 can obtain various parameter information from the BMS 70 to determine whether to perform energy storage component heating. When it determines to perform energy storage component heating, it sends an execution command to the control unit 60. The control unit 60 can determine whether to perform energy storage component heating based on the various parameter information obtained from the BMS 70; or, the control unit 60 can determine to perform energy storage component heating based on the execution command sent by the VCU 80. The control unit 60 can execute the energy storage component heating control strategy.

[0069] In some embodiments, such as Figure 4 As shown, the first fuse 52 can be installed in the second line 23, and the first fuse 52 can be integrated into the power distribution module 20; the relay S1 can be integrated into the motor 40, and the relay S1 can also be integrated into the motor controller 30.

[0070] In some embodiments, such as Figure 5 As shown, the first fuse 52 can be installed in the connection line between the relay S1 and the first node P11, and the first fuse 52 can be integrated into the energy storage device 10; the relay S1 can also be integrated into the energy storage device 10.

[0071] In some embodiments, such as Figure 6 As shown, the first fuse 52 can be installed in the second line 23, and the first fuse 52 can be integrated into the power distribution module 20; the relay S1 can be integrated into the energy storage device 10.

[0072] In some embodiments, such as Figure 7 As shown, the first fuse 52 can be installed in the connection line between the relay S1 and the first node P11, and the first fuse 52 can be integrated into the power distribution module 20; the relay S1 can be integrated into the power distribution module 20.

[0073] In some embodiments, such as Figure 8 As shown, the first fuse 52 can be installed in the second line 23, and the first fuse 52 can be integrated into the power distribution module 20; the relay S1 can be integrated into the power distribution module 20.

[0074] In some embodiments, the control unit may alternately execute the control operations of the first stage and the second stage, causing the second energy storage component to charge the first energy storage component using an inductor. In the first stage, the control unit controls the upper bridge arm switching units of the three bridge arm branches to be in the on state simultaneously, and controls the lower bridge arm switching units of the three bridge arm branches to be in the off state simultaneously, causing the second energy storage component 12 to discharge, thereby charging the inductor 41.

[0075] like Figure 9 As shown, the control unit performs in-phase control in the first stage. In the first stage, by controlling MOSFETs V1, V2, and V3 to be turned on simultaneously (the upper bridge arm switching units of the three bridge arm branches are simultaneously turned on), and controlling MOSFETs V4, V5, and V6 to be turned off simultaneously (the lower bridge arm switching units of the three bridge arm branches are simultaneously turned off), the current output by the second energy storage component 12 can charge inductors L1, L2, and L3. Figure 9 The dotted lines and arrows in the diagram indicate the direction of current flow in the first stage.

[0076] In the second stage, the control unit controls the upper bridge arm switching units of the three bridge arm branches to be in the off state at the same time, and controls the lower bridge arm switching units of the three bridge arm branches to be in the on state at the same time, so that the inductor charges the first energy storage component.

[0077] like Figure 10 As shown, the control unit performs in-phase control in the second stage. In the second stage, by controlling MOSFETs V1, V2, and V3 to be simultaneously turned off (the upper bridge arm switching units of the upper bridge arm switching units are simultaneously turned off), and controlling MOSFETs V4, V5, and V6 to be simultaneously turned on (the lower bridge arm switching units of the three bridge arm branches are simultaneously turned on), the current stored in inductors L1, L2, and L3 is input to the first energy storage component 11 to charge the first energy storage component 11. Figure 10 The dotted lines and arrows in the diagram indicate the direction of current flow in the second stage.

[0078] The control unit performs in-phase control of the bridge arm converter by alternately executing the first and second stage control operations, and controls the upper and lower bridge arm switching units of the three bridge arm branches to be in the on or off state, so that the second energy storage component charges the first energy storage component by using inductance to achieve self-heating; by generating oscillating current, the heating efficiency of the energy storage component can be improved.

[0079] The control unit can alternately execute the control operations of the third and fourth stages, so that the first energy storage component charges the second energy storage component using the inductor; in the third stage, the control unit controls the upper bridge arm switch units of the three bridge arm branches to be in the open state at the same time, and controls the lower bridge arm switch units of the three bridge arm branches to be in the open state at the same time, so that the first energy storage component discharges and is used to charge the inductor.

[0080] like Figure 11 As shown, the control unit performs in-phase control in the third stage. In the third stage, by controlling MOSFETs V1, V2, and V3 to be simultaneously turned off (the upper bridge arm switching units of the three bridge arm branches are simultaneously in the off state), and controlling MOSFETs V4, V5, and V6 to be simultaneously turned on (the lower bridge arm switching units of the three bridge arm branches are simultaneously in the off state), the current output by the first energy storage component 11 can charge inductors L1, L2, and L3. Figure 11 The dotted lines and arrows in the diagram indicate the direction of current flow in the third stage.

[0081] In the fourth stage, the control unit simultaneously turns on the upper bridge arm switching units of the three bridge arm branches and simultaneously turns off the lower bridge arm switching units of the three bridge arm branches, allowing the inductor to charge the second energy storage component. For example... Figure 12As shown, the control unit performs in-phase control in the fourth stage. In the fourth stage, by controlling MOSFETs V1, V2, and V3 to be turned on simultaneously (the upper bridge arm switching units of the upper bridge arm switching units are simultaneously turned on), and controlling MOSFETs V4, V5, and V6 to be turned off simultaneously (the lower bridge arm switching units of the three bridge arm branches are simultaneously turned off), the current stored in inductors L1, L2, and L3 is input to the second energy storage component 112 to charge the second energy storage component 12. Figure 12 The dotted lines and arrows in the diagram indicate the direction of current flow in the second stage.

[0082] The control unit performs in-phase control of the bridge arm converter by alternately executing the control operations of the third and fourth stages, and controls the upper and lower bridge arm switching units of the three bridge arm branches to be in the on or off state, so that the first energy storage component charges the second energy storage component by using an inductor, thereby realizing the self-heating of the energy storage component; by generating an oscillating current at both ends of the energy storage component, the heating efficiency and safety of the energy storage component can be improved.

[0083] The control unit performs in-phase control on the bridge arm converter, alternately executing the first and second stage control operations, so that the second energy storage component 12 charges the first energy storage component 11. The control unit alternately executes the first and second stage control operations as follows: first stage → second stage → first stage → second stage… first stage → second stage → first stage → second stage, and the duration of this alternation is T1. T1, as well as the duration of the first and second stages, can be set based on relevant experimental results.

[0084] The control unit performs in-phase control on the bridge arm converter, alternately executing the control operations of the third and fourth stages, so that the first energy storage component 11 charges the second energy storage component 12. The control unit alternately executes the control operations of the third and fourth stages as follows: third stage → fourth stage → third stage → fourth stage… third stage → fourth stage → third stage → fourth stage, and the duration of this alternation is T2. T2, as well as the duration of the third and fourth stages, can be set based on relevant experimental results.

[0085] The control device performs in-phase control on the bridge arm converter, alternately executing the first and second stage control operations, and alternately executing the third and fourth stage control operations, so that the charging and discharging current frequency of the first energy storage component 11 and the second energy storage component 12 is 1 / (T1+T2)Hz.

[0086] In some embodiments, the control unit alternately executes the control operations of the first stage and the second stage, causing the second energy storage component to charge the first energy storage component using an inductor. In the first stage, the upper bridge arm switching units of the three bridge arm branches are controlled to be in the on state, wherein the phase of each upper bridge arm switching unit is sequentially lagging behind one-third of the control cycle, and the lower bridge arm switching units of the three bridge arm branches are controlled to be in the off state simultaneously, causing the second energy storage component to discharge and charge the inductor.

[0087] like Figure 13A , Figure 13B and Figure 13C As shown, the control unit performs phase shift control in the first stage. In the first stage, the phases of control MOSFETs V1, V2, and V3 are sequentially shifted by one-third of the control cycle, that is, the control MOSFETs V1, V2, and V3 are sequentially shifted by one-third of the control cycle (the upper bridge arm switching units of the three bridge arm branches are in the on state, and the phase of each upper bridge arm switching unit is sequentially shifted by one-third of the control cycle); the control MOSFETs V4, V5, and V6 are simultaneously shifted off (the lower bridge arm switching units of the three bridge arm branches are simultaneously in the off state).

[0088] like Figure 13A As shown, the current output by the second energy storage component 12 can charge the inductor L3. For example... Figure 13B As shown, the current output by the second energy storage component 12 can charge the inductor L2. For example... Figure 13C As shown, the current output by the second energy storage component 12 can charge the inductor L1. For example... Figure 13A , Figure 13B and Figure 13C The dotted lines and arrows in the diagram indicate the direction of current flow in the first stage.

[0089] In the second stage, the control unit controls the upper bridge arm switching units of the three bridge arm branches to be in the off state simultaneously, and controls the lower bridge arm switching units of the three bridge arm branches to be in the on state. The phase of each lower bridge arm switching unit is delayed by one-third of the control cycle, so that the inductor charges the first energy storage component.

[0090] like Figure 14A , Figure 14B and Figure 14CAs shown, the control unit performs phase shift control in the second stage. In the second stage, control MOSFETs V1, V2, and V3 are simultaneously turned off (the upper bridge arm switching units of the three bridge arm branches are simultaneously in the off state), and control MOSFETs V4, V5, and V6 are turned on with their phases lagging by one-third of the control cycle. That is, control MOSFETs V4, V5, and V6 are turned on with their phases shifted by one-third of the control cycle (the lower bridge arm switching units of the three bridge arm branches are turned on, and the phase of each lower bridge arm switching unit is lagging by one-third of the control cycle).

[0091] like Figure 14A As shown, the current stored in inductor L3 is input to the first energy storage component 11 to charge the first energy storage component 11. Figure 14B As shown, the current stored in inductor L2 is input to the first energy storage component 11 to charge the first energy storage component 11. Figure 14C As shown, the current stored in inductor L1 is input to the first energy storage component 11 to charge the first energy storage component 11. Figure 14A , Figure 14B and Figure 14C The dotted lines and arrows in the diagram indicate the direction of current flow in the second stage.

[0092] The control unit performs phase shift control on the bridge arm converter by alternately executing the first and second stage control operations, and controls the upper and lower bridge arm switching units of the three bridge arm branches to be in the on or off state, so that the second energy storage component charges the first energy storage component through inductance, thereby heating the energy storage component. By generating an oscillating current at both ends of the energy storage component, the heating efficiency of the energy storage component can be improved.

[0093] The control unit alternately executes the control operations of the third and fourth stages, causing the first energy storage component to charge the second energy storage component using an inductor. In the third stage, the control unit controls the upper bridge arm switching units of the three bridge arm branches to be simultaneously in the off state and controls the lower bridge arm switching units of the three bridge arm branches to be simultaneously in the on state. The phase of each lower bridge arm switching unit lags behind the control cycle by one-third, causing the first energy storage component to discharge and charge the inductor.

[0094] like Figure 15A , Figure 15B and Figure 15CAs shown, the control unit performs phase shift control in the third stage. In the third stage, the control field-effect transistors V1, V2, and V3 are simultaneously turned off (the upper bridge arm switching units of the three bridge arm branches are simultaneously in the off state); the control field-effect transistors V4, V5, and V6 are turned on with their phases lagging by one-third of the control cycle, that is, the control field-effect transistors V4, V5, and V6 are turned on with their phases shifted by one-third of the control cycle (the lower bridge arm switching units of the three bridge arm branches are turned on, and the phase of each lower bridge arm switching unit is sequentially lagging by one-third of the control cycle).

[0095] like Figure 15A As shown, the current output by the first energy storage component 11 can charge the inductor L3. For example... Figure 15B As shown, the current output by the first energy storage component 11 can charge the inductor L2. For example... Figure 15C As shown, the current output by the first energy storage component 11 can charge the inductor L1. Figure 15A , Figure 15B and Figure 15C The dotted lines and arrows in the diagram indicate the direction of current flow in the third stage.

[0096] In the fourth stage, the control unit controls the upper bridge arm switching units of the three bridge arm branches to be in the conducting state, wherein the phase of each upper bridge arm switching unit is successively lagging behind one-third of the control cycle, and controls the lower bridge arm switching units of the three bridge arm branches to be in the disconnected state at the same time, so that the inductor charges the second energy storage component.

[0097] like Figure 16A , Figure 16B and Figure 16C As shown, phase shift control is performed in the fourth stage. In the fourth stage, the phases of control MOSFETs V1, V2, and V3 are sequentially shifted by one-third of the control cycle, that is, the control cycles of control MOSFETs V1, V2, and V3 are shifted by one-third of the control cycle (the upper bridge arm switching units of the three bridge arm branches are in the on state, and the phases of each lower bridge arm switching unit are sequentially shifted by one-third of the control cycle); the control MOSFETs V4, V5, and V6 are simultaneously shifted off (the lower bridge arm switching units of the three bridge arm branches are simultaneously in the off state).

[0098] like Figure 16A As shown, the current stored in inductor L3 is input to the second energy storage component 12 to charge the second energy storage component 12. Figure 16B As shown, the current stored in inductor L2 is input to the second energy storage component 12 to charge the second energy storage component 12. Figure 16C As shown, the current stored in inductor L1 is input to the second energy storage component 12 to charge the second energy storage component 12. Figure 16A , Figure 16Band Figure 16C The dotted lines and arrows in the diagram indicate the direction of current flow in the fourth stage.

[0099] The control unit performs phase shift control on the bridge arm converter by alternately executing the third and fourth stage control operations, controlling the upper and lower bridge arm switching units of the three bridge arm branches to be in the on or off state, so that the first energy storage component charges the second energy storage component using an inductor, realizing the self-heating of the energy storage component; by generating oscillating current, the heating efficiency of the energy storage component can be improved.

[0100] The control unit performs phase shift control on the bridge arm converter, alternately executing the first and second stage control operations to charge the first energy storage component from the second. The control unit alternately executes the first and second stage control operations as follows: first stage → second stage → first stage → second stage… first stage → second stage → first stage → second stage, with a duration of T1. T1, as well as the duration of the first and second stages, can be set based on relevant experimental results.

[0101] The control unit performs phase shift control on the bridge arm converter, alternately executing the third and fourth stage control operations, so that the first energy storage component 11 charges the second energy storage component 12. The control unit alternately executes the third and fourth stage control operations as follows: third stage → fourth stage → third stage → fourth stage… third stage → fourth stage → third stage → fourth stage, and the duration of this alternation is T2. T2, as well as the duration of the third and fourth stages, can be set based on relevant experimental results.

[0102] The control device alternately performs phase shift control on the bridge arm converter, alternately executes the first stage and the second stage control operations, and alternately executes the third stage and the fourth stage control operations, so that the charging and discharging current frequency of the first energy storage component 11 and the second energy storage component 12 is 1 / (T1+T2)Hz.

[0103] In some embodiments, this disclosure provides an electrical device including a heating system for an energy storage component as described in any of the above embodiments. The electrical device can be of various types, such as a new energy vehicle, a ship, electrical equipment, or an energy storage device.

[0104] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0105] The methods and systems of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0106] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heating system for an energy storage component, characterized in that, include: The device includes an energy storage unit, a power distribution module, an inductor, a motor controller, a first switching unit, a second switching unit, and a control unit; the energy storage unit includes a first energy storage component and a second energy storage component, the motor controller includes a bridge arm converter, and the power distribution module includes a first line and a second line. The positive terminal of the first energy storage component is connected to the negative terminal of the second energy storage component at a first node; the two ends of the first line are respectively connected to the first end of the bridge arm converter and the positive terminal of the second energy storage component, and the two ends of the second line are respectively connected to the second end of the bridge arm converter and the negative terminal of the first energy storage component; a first switching unit is provided in the first line and / or the second line; the first end of the inductor is connected to the third end of the bridge arm converter, and the second end of the inductor is connected to the first node through a second switching unit; The control unit is electrically connected to the first switching unit, the second switching unit, and the bridge arm converter, respectively. The control unit is used to control the first switching unit, the second switching unit, and the bridge arm converter, so that the first energy storage component charges the second energy storage component using the inductor and / or the second energy storage component charges the first energy storage component using the inductor.

2. The system as claimed in claim 1, wherein, The bridge arm converter includes three bridge arm branches, each of which includes an upper bridge arm switch unit and a lower bridge arm switch unit connected in series. The upper bridge arm switch unit and the lower bridge arm switch unit are electrically connected through a second node. The first ends of the three bridge arm branches are connected together to form the first end of the bridge arm converter, the second ends of the three bridge arm branches are connected together to form the second end of the bridge arm converter, and the third end of the bridge arm converter includes the second node in the bridge arm branch.

3. The system as described in claim 2, wherein, The inductor includes three inductors; The inductors correspond one-to-one with the bridge arm branches, and the first end of each inductor is connected to the second node in the corresponding bridge arm branch; the second ends of the three inductors are connected together to form a neutral point, which serves as the second end of the inductor.

4. The system as described in claim 3, wherein, The first terminal of each inductor is connected to the second node in the corresponding bridge arm branch through a resistor.

5. The system as described in claim 1, characterized in that, include: First fuse; The first fuse is installed in the connection line between the second switch unit and the first node, or in the second line.

6. The system of claim 5, wherein, The first fuse is integrated in the energy storage device or the power distribution module.

7. The system as described in claim 1, characterized in that, include: Second fuse; The second fuse is installed in the first circuit.

8. The system of claim 1, wherein, The second switching unit is integrated into the energy storage device, the motor, or the power distribution module.

9. The system as claimed in claim 1, wherein, The power distribution module includes: a pre-charging circuit; the pre-charging circuit is connected in parallel with the first switching unit, and the pre-charging circuit includes a resistor and a third switching unit.

10. An electrical device, characterized in that, include: Heating system for energy storage components as described in any one of claims 1 to 9.

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