Power battery pack, energy storage circuit and vehicle

Abstract

The utility model relates to a power battery pack, an energy storage circuit and a vehicle. The power battery pack comprises a power battery, an inverter circuit and an output port, the positive electrode confluence end of the inverter circuit is connected with the positive electrode of the power battery, the negative electrode confluence end of the inverter circuit is connected with the negative electrode of the power battery, and the output end of the inverter circuit is connected with the output port; the inverter circuit converts direct current output by the power battery into alternating current and outputs the alternating current to the output port. The power battery pack provided by the utility model can be directly used for supplying power to the load without being disassembled, so that maximum reuse of resources is realized.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a power battery pack, an energy storage circuit and a vehicle. Background Art

[0002] In recent years, new energy vehicles have developed rapidly. When the capacity of electric vehicle batteries decays to 80% of the rated capacity, they can no longer be used in electric vehicles. At this time, the power battery pack needs to be retired from the vehicle. The retired power battery pack can be used for home energy storage. Since the power battery outputs direct current, it cannot directly power the load, so an external inverter circuit is required.

[0003] The current existing solutions usually involve disassembling the power battery pack and then using the required components one by one according to demand, which increases the disassembly cost. In addition, the remaining components of the power battery pack after disassembly are difficult to reuse, resulting in a waste of resources. Summary of the invention

[0004] An object of the embodiments of the present application is to provide a new power battery pack, energy storage circuit and vehicle. The power battery pack of the embodiments of the present application can be directly used to supply power to a load without disassembly, thereby achieving maximum reuse of resources.

[0005] According to a first aspect of the present application, a power battery pack is provided, comprising: a power battery, an inverter circuit and an output port,

[0006] The positive bus terminal of the inverter circuit is connected to the positive electrode of the power battery, the negative bus terminal of the inverter circuit is connected to the negative electrode of the power battery, and the output terminal of the inverter circuit is connected to the output port;

[0007] The inverter circuit converts the direct current output by the power battery into alternating current, and outputs the alternating current to the output port.

[0008] Optionally, the inverter circuit includes a first bridge arm,

[0009] The upper bridge arm of the first bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the first bridge arm is connected to the negative electrode of the power battery;

[0010] A midpoint of the first bridge arm is connected to the output port.

[0011] Optionally, the inverter circuit includes a first bridge arm, a second bridge arm and a third bridge arm,

[0012] The upper bridge arm of the first bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the first bridge arm is connected to the negative electrode of the power battery;

[0013] The upper bridge arm of the second bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the second bridge arm is connected to the negative electrode of the power battery;

[0014] The upper bridge arm of the third bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the third bridge arm is connected to the negative electrode of the power battery;

[0015] The midpoint of the first bridge arm, the midpoint of the second bridge arm, and the midpoint of the third bridge arm are respectively connected to the output port.

[0016] Optionally, the inverter circuit is an inverter circuit in a compressor controller or an inverter circuit in a motor controller.

[0017] Optionally, the inverter circuit is an inverter circuit in a compressor controller, and the output port has a first port, a second port and a third port.

[0018] The midpoint of the first bridge arm of the inverter circuit in the compressor controller is connected to the first port of the output port;

[0019] The midpoint of the second bridge arm of the inverter circuit in the compressor controller is connected to the second port of the output port;

[0020] A midpoint of a third bridge arm of the inverter circuit in the compressor controller is connected to a third port of the output port.

[0021] Optionally, the inverter circuit is an inverter circuit in a motor controller, and the output port has a fourth port, a fifth port and a sixth port.

[0022] The midpoint of the first bridge arm of the inverter circuit in the motor controller is connected to the fourth port of the output port;

[0023] The midpoint of the second bridge arm of the inverter circuit in the motor controller is connected to the fifth port of the output port;

[0024] The midpoint of the third bridge arm of the inverter circuit in the motor controller is connected to the sixth port of the output port.

[0025] Optionally, the output port has a seventh port and an eighth port, and the power battery pack further includes a heater.

[0026] The first end of the heater is connected to the positive electrode of the power battery, the second end of the heater is connected to the negative electrode of the power battery, the third end of the heater is connected to the seventh port of the output port, and the fourth end of the heater is connected to the eighth port of the output port.

[0027] Optionally, the heater comprises a first switching device and a second switching device,

[0028] The first end of the first switching device is connected to the positive electrode of the power battery, the first end of the second switching device is connected to the negative electrode of the power battery, the second end of the first switching device is connected to the seventh port of the output port, and the second end of the second switching device is connected to the eighth port of the output port.

[0029] Optionally, the power battery pack further includes a power battery pack management unit, and the power battery pack management unit is connected in parallel with the power battery.

[0030] Optionally, the power battery pack further includes a switch unit, which controls the power battery to output electrical energy, and the switch unit is connected in series with the power battery.

[0031] According to a second aspect of the present application, there is provided an energy storage circuit, comprising a power battery pack as described in any one of the first aspect of the present application, wherein the output port of the power battery pack is connected to a load.

[0032] Optionally, an energy storage element is further included, and the output port of the power battery pack is connected to a load through the energy storage element.

[0033] Optionally, the energy storage element comprises a first energy storage element,

[0034] The first energy storage element is connected to a first port of the output port.

[0035] Optionally, the energy storage element includes a first energy storage element, a second energy storage element, and a third energy storage element.

[0036] The first energy storage element is connected to a first port of the output port;

[0037] The second energy storage element is connected to the second port of the output port;

[0038] The third energy storage element is connected to the third port of the output port.

[0039] Optionally, the energy storage element comprises a first energy storage element,

[0040] The first energy storage element is connected to a fourth port of the output port.

[0041] Optionally, the energy storage element includes a first energy storage element, a second energy storage element, and a third energy storage element.

[0042] The first energy storage element is connected to a fourth port of the output port;

[0043] The second energy storage element is connected to the fifth port of the output port;

[0044] The third energy storage element is connected to the sixth port of the output port.

[0045] Optionally, the seventh port of the output port and the eighth port of the output port are connected to the load.

[0046] Optionally, one of the fourth port, the fifth port and the sixth port of the output port is connected to the load.

[0047] Optionally, one of the first port, the second port and the third port of the output port is connected to the load.

[0048] According to a third aspect of the present application, a vehicle is provided, comprising a power battery pack as described in any one of the first aspect of the present application, or an energy storage circuit as described in any one of the second aspect of the present application.

[0049] One beneficial effect of the embodiment of the present application is that, by integrating the inverter circuit in the power battery pack, the power battery pack can directly reuse the output AC power to power the load after retirement, which is simple to operate. In addition, since the power battery pack is not disassembled, its original components are still usable, which does not cause waste of resources.

[0050] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0052] Figure 1 It is a schematic diagram of the structure of a power battery pack provided according to an embodiment of the present application.

[0053] Figure 2 This is a circuit diagram of a power battery pack provided according to an embodiment of the present application.

[0054] Figure 3 It is a circuit diagram of an energy storage circuit provided according to an embodiment of the present application.

[0055] Figure 4 It is a circuit diagram of an energy storage circuit provided according to another embodiment of the present application.

[0056] Figure 5 It is a circuit diagram of an energy storage circuit provided according to another embodiment of the present application.

[0057] Figure 6It is a circuit diagram of an energy storage circuit provided according to another embodiment of the present application. DETAILED DESCRIPTION

[0058] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0059] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0060] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0061] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0062] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0063] In recent years, new energy vehicles have developed rapidly. When the capacity of electric vehicle batteries decays to 80% of the rated capacity, they can no longer be used in electric vehicles. At this time, the power battery pack needs to be retired from the vehicle. The retired power battery pack can be used for home energy storage. Since the power battery outputs direct current, it cannot directly power the load, so an external inverter circuit is required.

[0064] The current existing solutions usually involve disassembling the power battery pack and then using the required components one by one according to demand, which increases the disassembly cost. In addition, the remaining components of the power battery pack after disassembly are difficult to reuse, resulting in a waste of resources.

[0065] Based on this, the present application embodiment provides a power battery pack. Figure 1 As shown, the power battery pack 100 may include: a power battery 110, an inverter circuit 120, and an output port 130. The positive bus terminal of the inverter circuit 120 is connected to the positive electrode of the power battery 110, and the negative bus terminal of the inverter circuit 120 is connected to the negative electrode of the power battery 110. The inverter circuit 120 converts the direct current outputted by the power battery 110 into alternating current, and outputs it to the output port 130.

[0066] In this embodiment, the inverter circuit 120 may be any circuit that can realize the inverter function. Preferably, the circuit that can realize the inverter function in the existing vehicle system may be reused.

[0067] The existing high-voltage power distribution system includes a compressor controller and a motor controller. The compressor controller is used to control the operation of compressors such as air conditioners, and the motor controller is used to drive the vehicle. Considering that both the compressor controller and the motor controller are connected to the power battery 110, and the power elements in the compressor controller and the motor controller can realize the inverter function, in one example, the inverter circuit 120 can be an inverter circuit composed of power elements in the compressor controller or an inverter circuit composed of power elements in the motor controller. In this example, the compressor controller or the motor controller can be integrated into the power battery pack 100, and the power elements in the compressor controller or the power elements in the motor controller can realize the inverter function of the power battery pack.

[0068] In this embodiment, the output port 130 can be connected to a load to supply power to the load. The output port 130 can be connected to the load via a live wire.

[0069] The embodiment of the present application integrates an inverter circuit in the power battery pack, so that the power battery pack can directly output AC power to supply power to the load after retirement, which is simple to operate. In addition, since the power battery pack is not disassembled, its original components are still usable, which will not cause waste of resources.

[0070] In addition, this embodiment integrates the devices that can realize the inverter function in the existing high-voltage power distribution system into the power battery pack, and can still be connected to the devices in the high-voltage power distribution system through the output port of the power battery pack. Moreover, compared with the existing high-voltage power distribution system, this embodiment omits the high-voltage wire harness and connectors required for connecting the compressor controller or motor controller with the power battery in the existing high-voltage power distribution system, and the cost is low.

[0071] In this embodiment, the inverter circuit 120 may include a first bridge arm. The upper bridge arm of the first bridge arm is connected to the positive electrode of the power battery 110, and the lower bridge arm of the first bridge arm is connected to the negative electrode of the power battery 110. The midpoint of the first bridge arm is connected to the output port 130. In other words, the first end of the upper bridge arm of the first bridge arm is connected to the positive electrode of the power battery 110, the first end of the lower bridge arm of the first bridge arm is connected to the negative electrode of the power battery 110, and the second end of the upper bridge arm of the first bridge arm is connected to the second end of the lower bridge arm of the first bridge arm. The second end of the upper bridge arm of the first bridge arm and the second end of the lower bridge arm of the first bridge arm are connected to the output port 130.

[0072] As an example, Figure 2As shown, the inverter circuit 120 includes a first bridge arm Z. The first bridge arm can be composed of a switching device. The switching device can be, for example, an IGBT (insulated gate bipolar transistor), or a MOSFET (metal-oxide semiconductor field effect transistor). Of course, it can also be other contactors or relays, which are not specifically limited here. The upper bridge arm and the lower bridge arm of the first bridge arm can be composed of two switching devices.

[0073] In this embodiment, the power battery is connected to the first bridge arm in the inverter circuit, and the duty cycle of the switch device in the first bridge arm is controlled to control the periodic on and off of the first bridge arm, thereby outputting single-phase alternating current.

[0074] In the present embodiment, the inverter circuit 120 may further include three bridge arms, namely, a first bridge arm, a second bridge arm, and a third bridge arm. The upper bridge arm of the first bridge arm and the lower bridge arm of the first bridge arm are respectively connected to the two ends of the power battery 110. In other words, the upper bridge arm of the first bridge arm is connected to the positive pole of the power battery, and the lower bridge arm of the first bridge arm is connected to the negative pole of the power battery. The upper bridge arm of the second bridge arm is connected to the positive pole of the power battery, and the lower bridge arm of the second bridge arm is connected to the negative pole of the power battery. The upper bridge arm of the third bridge arm is connected to the positive pole of the power battery, and the lower bridge arm of the third bridge arm is connected to the negative pole of the power battery. In the present embodiment, the midpoint of the first bridge arm, the midpoint of the second bridge arm, and the midpoint of the third bridge arm are respectively connected to the output port 130.

[0075] As an example, Figure 2 As shown, the inverter 120 includes a first bridge arm Z (or W), a second bridge arm Y (or V) and a third bridge arm X (or U). The first bridge arm Z (or W), the second bridge arm Y (or V) and the third bridge arm X (or U) can all be composed of IGBTs or other contactors or relays. The upper bridge arm and the lower bridge arm of the first bridge arm, the upper bridge arm and the lower bridge arm of the second bridge arm, and the upper bridge arm and the lower bridge arm of the third bridge arm can all be composed of two switching devices.

[0076] In this embodiment, the power battery is connected to three bridge arms in the inverter circuit, and the duty ratio of the switching devices in the three bridge arms is controlled to control the periodic switching of the three bridge arms, thereby outputting three-phase alternating current.

[0077] In this embodiment, the bridge arm of the inverter circuit can be formed by the power elements in the compressor controller 140 or the motor controller 150 .

[0078] like Figure 2As shown, the output port 130 may have a first port 1. When the inverter circuit 120 is an inverter circuit in the compressor controller 140, the midpoint of the first bridge arm of the inverter circuit in the compressor controller 140 is connected to the first port 1 of the output port 130.

[0079] In this embodiment, the first port 1 of the output port may be connected to a load to provide single-phase alternating current to the load.

[0080] The output port 130 may further include a first port 1, a second port 2, and a third port 3. When the inverter circuit 120 is an inverter circuit in the compressor controller 140, the midpoint of the first bridge arm of the inverter circuit in the compressor controller 140 is connected to the first port 1 of the output port 130. The midpoint of the second bridge arm of the inverter circuit in the compressor controller 140 is connected to the second port 2 of the output port 130. The midpoint of the third bridge arm of the inverter circuit in the compressor controller 140 is connected to the third port 3 of the output port 130.

[0081] In this embodiment, the first port, the second port, and the third port of the output port may be connected to a load to provide three-phase alternating current to the load.

[0082] The output port 130 may further have a fourth port 4 . When the inverter circuit 120 is an inverter circuit in the motor controller 150 , the midpoint of the first bridge arm of the inverter circuit in the motor controller 150 is connected to the fourth port 4 of the output port 130 .

[0083] In this embodiment, the fourth port of the output port may be connected to a load to provide single-phase alternating current to the load.

[0084] The output port 130 may also have a fourth port 4, a fifth port 5, and a sixth port 6. When the inverter circuit 120 is an inverter circuit in the motor controller 150, the midpoint of the first bridge arm of the inverter circuit in the motor controller 150 is connected to the fourth port 4 of the output port 130. The midpoint of the second bridge arm of the inverter circuit in the motor controller 150 is connected to the fifth port 5 of the output port 130. The midpoint of the third bridge arm of the inverter circuit in the motor controller 150 is connected to the sixth port 6 of the output port 130.

[0085] In this embodiment, the fourth port, the fifth port, and the sixth port of the output port may be connected to a load to provide three-phase alternating current to the load.

[0086] In some embodiments, a reference potential needs to be provided for powering the load. Based on this, the power battery pack 100 of this embodiment may include a reference potential generating circuit. The reference potential generating circuit is connected to the output port of the power battery pack 100 and provides a reference potential through the output port. The output port of the power battery pack 100 and the load may be connected via a neutral line to provide a reference potential.

[0087] In this embodiment, the reference potential generating circuit can be implemented by reusing a heater in an existing high-voltage power distribution system.

[0088] In this embodiment, Figure 2 As shown, the output port 130 may also have a seventh port 7 and an eighth port 8. The power battery pack 100 may further include a heater 160. A first end of the heater 160 is connected to the positive electrode of the power battery 110, a second end of the heater 160 is connected to the negative electrode of the power battery 110, a third end of the heater 160 is connected to the seventh port 7 of the output port 130, and a fourth end of the heater 160 is connected to the eighth port 8 of the output port 130.

[0089] In this embodiment, the heater 160 may be, for example, a PTC heater.

[0090] In this embodiment, the seventh port and the eighth port of the output port can be connected. At this time, both ends of the heater 160 are connected to form a bridge arm, and the middle point of the bridge arm is connected to the load to provide a reference potential.

[0091] The embodiment of the present application reuses the heater in the existing high-voltage power distribution system as a circuit for generating reference potential, without increasing the volume of the vehicle power distribution system. At the same time, compared with the existing high-voltage power distribution system in which the power battery and the heater are connected by a high-voltage wire harness and a connector, the embodiment of the present application integrates the heater in the battery pack, eliminating the need for connection through a high-voltage wire harness and a connector, thereby reducing costs.

[0092] The heater 160 may include a first switch device and a second switch device. A first end of the first switch device is connected to the positive electrode of the power battery 110, a first end of the second switch device is connected to the negative electrode of the power battery 110, a second end of the first switch device is connected to the seventh port 7 of the output port 130, and a second end of the second switch device is connected to the eighth port 8 of the output port 130.

[0093] The embodiment of the present application reuses the heater in the high-voltage power distribution system, connects the first switching device and the second switching device in the heater connected to the positive and negative electrodes of the power battery to form a bridge arm, and connects the midpoint of the bridge arm to the load, thereby providing a reference potential.

[0094] In this embodiment, the reference potential generating circuit can also be implemented by reusing the compressor controller or motor controller in the existing high-voltage power distribution system. When the power battery pack 100 integrates the compressor controller 140, the inverter circuit 120 is the inverter circuit in the compressor controller 140. At this time, the power battery pack 100 can also integrate the motor controller 150, and the midpoint of one bridge arm of the inverter circuit in the motor controller 150 provides the reference potential. When the power battery pack 100 integrates the motor controller 150, the inverter circuit 120 is the inverter circuit in the motor controller 150. At this time, the power battery pack 100 can also integrate the compressor controller 140, and the midpoint of one bridge arm of the inverter circuit in the compressor controller 140 provides the reference potential.

[0095] In some embodiments, the power battery pack 100 may further include a power battery pack management unit. Figure 2 As shown, the power battery pack management unit BASU is connected in parallel with the power battery 110. The battery pack management unit BASU can be used to control the closing and opening of each switch device in the power battery pack 100.

[0096] In some embodiments, the power battery pack 100 may further include a switch unit A. The switch unit A may control the power battery 110 to output electrical energy. The switch unit A is connected in series with the power battery 110 .

[0097] In this embodiment, the switch unit A may be a main switch for charging and discharging the power battery pack 100 .

[0098] In some embodiments, the power battery pack 100 may further include an on-board charger DCOBC. The on-board charger DCOBC may charge the power battery 110. The on-board charger DCOBC is connected in parallel with the power battery 110.

[0099] In this embodiment, the power battery pack 100 may further include a control unit that can control the connection between the power battery pack 100 and the on-board charger DCOBC. Figure 2 A first switch assembly B and a second switch assembly C are shown.

[0100] In this embodiment, the power battery pack 100 may further include a detection unit D. The detection unit D may be used to obtain information such as the temperature and SOH (State of Health) of the power battery pack.

[0101] The power battery pack 100 provided in the embodiment of the present application can be used in an energy storage circuit, such as a household energy storage circuit, to supply power to a load after retirement. Figures 3 to 6As shown, the energy storage circuit of this embodiment may include the power battery pack 100 of the above embodiment. The output port 130 of the power battery pack 100 is connected to the load 170. In this embodiment, the output port and the load may be connected via a live wire to supply power to the load.

[0102] The energy storage circuit of this embodiment does not need to add an additional inverter circuit, and can directly supply power to the load, which is simple to operate. Moreover, since the power battery pack 100 has not been disassembled, its original components are still available, and there is no waste of resources. In addition, this embodiment integrates the devices in the existing high-voltage power distribution system that can realize the inverter function into the power battery pack 100, and can still be connected to the devices in the high-voltage power distribution system through the output port of the power battery pack 100. Compared with the existing high-voltage power distribution system, this embodiment omits the high-voltage wiring harness and connectors required to connect the compressor controller or motor controller to the power battery in the existing high-voltage power distribution system, and the cost is low.

[0103] Considering that the voltage output by the power battery pack 100 and the voltage required by the load 170 may not match, in some embodiments, the energy storage circuit may further include an energy storage element 180 , and the output port 130 of the power battery pack 100 is connected to the load 170 via the energy storage element 180 .

[0104] In this embodiment, the energy storage element 180 may be an inductor or other energy storage element. The energy storage element 180 may reuse the compressor motor corresponding to the compressor controller 140, and use the inductance of the compressor motor to store energy. The energy storage element 180 may also reuse the motor corresponding to the motor controller 150, and use the inductance of the motor to store energy. Of course, the energy storage element 180 may also be an external energy storage element.

[0105] In this embodiment, the energy storage element 180 may include a first energy storage element. The first energy storage element may be connected to the first port 1 of the output port 130 .

[0106] In this embodiment, if Figure 3 As shown, a bridge arm Z of the inverter circuit in the compressor controller 140 and the first energy storage element can form a non-isolated converter to regulate and convert the voltage output by the power battery 110.

[0107] In this embodiment, Figure 3 As shown, the energy storage element 180 may also include a first energy storage element, a second energy storage element, and a third energy storage element. The first energy storage element may be connected to the first port 1 of the output port 130; the second energy storage element may be connected to the second port 2 of the output port 130; and the third energy storage element may be connected to the third port 3 of the output port 130.

[0108] In this embodiment, the three bridge arms of the inverter circuit in the compressor controller 140 and the three energy storage elements can respectively form a non-isolated converter to regulate and convert the voltage output by the power battery 110 .

[0109] In this embodiment, Figure 4 As shown, the energy storage element may include a first energy storage element, and the first energy storage element may be connected to the fourth port 4 of the output port 130 .

[0110] In this embodiment, a bridge arm of the inverter circuit in the motor controller 150 and the first energy storage element may form a non-isolated converter to regulate and convert the voltage output by the power battery 110 .

[0111] In this embodiment, Figure 4 As shown, the energy storage element may also include a first energy storage element, a second energy storage element, and a third energy storage element. The first energy storage element may be connected to the fourth port 4 of the output port 130; the second energy storage element may be connected to the fifth port 5 of the output port 130; and the third energy storage element may be connected to the sixth port 6 of the output port 130.

[0112] In this embodiment, the three bridge arms of the inverter circuit in the motor controller 150 and the three energy storage elements can respectively form a non-isolated converter to regulate and convert the voltage output by the power battery 110 .

[0113] In some embodiments, Figure 3 and Figure 4 As shown, the output port 130 has a seventh port 7 and an eighth port 8. The seventh port 7 and the eighth port 8 are connected to the heater. In this embodiment, the seventh port 7 of the output port 130 and the eighth port 8 of the output port 130 can be connected and connected to the load 170. In this embodiment, the two ends of the heater (i.e., the positive and negative electrodes of the heater) are connected to form a bridge arm, and the midpoint of the bridge arm is connected to the load to provide a reference potential.

[0114] In this embodiment, the inverter circuit 120 may be an inverter circuit in the compressor controller 140 or an inverter circuit in the motor controller 150 , and the reference potential generating circuit may be implemented by connecting two ends of the heater.

[0115] In some embodiments, Figure 5 As shown, when the inverter circuit 120 is an inverter circuit in the compressor controller 140, one of the fourth port 4, the fifth port 5, and the sixth port 6 of the output port 130 may also be connected to the load 170. In this embodiment, a reference potential is provided by connecting the midpoint of one bridge arm of the inverter circuit in the motor controller 150 to the load.

[0116] In some embodiments, Figure 6 As shown, when the inverter circuit 120 is an inverter circuit in the motor controller 150, one of the first port 1, the second port 2, and the third port 3 of the output port 130 may also be connected to the load 170. In this embodiment, the midpoint of one bridge arm of the inverter circuit in the compressor controller 140 is connected to the load to provide a reference potential.

[0117] The embodiments of the present application provide a variety of energy storage circuits. When the power battery pack is retired, the AC power output by the power battery pack can be directly output to the load through the above-mentioned multiple energy storage circuits to power the load, thereby realizing the secondary utilization of the retired power battery pack. Moreover, it is only necessary to connect the energy storage element to the retired power battery pack to realize the conversion of the voltage output by the power battery pack. The embodiments of the present application have a higher reuse rate for retired power battery packs.

[0118] The embodiment of the present application further provides a vehicle, which includes a power battery pack 100 as described in the above embodiment, or an energy storage circuit as described in the above embodiment.

[0119] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present application is defined by the appended claims.

Claims

1. A power battery pack, characterized in that: include: Power battery, inverter circuit and output port, The positive bus terminal of the inverter circuit is connected to the positive electrode of the power battery, the negative bus terminal of the inverter circuit is connected to the negative electrode of the power battery, and the output terminal of the inverter circuit is connected to the output port; The inverter circuit converts the direct current output by the power battery into alternating current, and outputs the alternating current to the output port.

2. The power battery pack according to claim 1, characterized in that: The inverter circuit comprises a first bridge arm, The upper bridge arm of the first bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the first bridge arm is connected to the negative electrode of the power battery; A midpoint of the first bridge arm is connected to the output port.

3. The power battery pack according to claim 1, characterized in that: The inverter circuit includes a first bridge arm, a second bridge arm and a third bridge arm. The upper bridge arm of the first bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the first bridge arm is connected to the negative electrode of the power battery; The upper bridge arm of the second bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the second bridge arm is connected to the negative electrode of the power battery; The upper bridge arm of the third bridge arm is connected to the positive electrode of the power battery, and the lower bridge arm of the third bridge arm is connected to the negative electrode of the power battery; The midpoint of the first bridge arm, the midpoint of the second bridge arm, and the midpoint of the third bridge arm are respectively connected to the output port.

4. The power battery pack according to claim 1, characterized in that: The inverter circuit is an inverter circuit in a compressor controller or an inverter circuit in a motor controller.

5. The power battery pack according to claim 4, characterized in that: The inverter circuit is an inverter circuit in a compressor controller, and the output port has a first port, a second port, and a third port. The midpoint of the first bridge arm of the inverter circuit in the compressor controller is connected to the first port of the output port; The midpoint of the second bridge arm of the inverter circuit in the compressor controller is connected to the second port of the output port; A midpoint of a third bridge arm of the inverter circuit in the compressor controller is connected to a third port of the output port.

6. The power battery pack according to claim 4, characterized in that: The inverter circuit is an inverter circuit in a motor controller, and the output port has a fourth port, a fifth port and a sixth port. The midpoint of the first bridge arm of the inverter circuit in the motor controller is connected to the fourth port of the output port; The midpoint of the second bridge arm of the inverter circuit in the motor controller is connected to the fifth port of the output port; The midpoint of the third bridge arm of the inverter circuit in the motor controller is connected to the sixth port of the output port.

7. The power battery pack according to claim 1, characterized in that: The output port has a seventh port and an eighth port, and the power battery pack further includes a heater. The first end of the heater is connected to the positive electrode of the power battery, the second end of the heater is connected to the negative electrode of the power battery, the third end of the heater is connected to the seventh port of the output port, and the fourth end of the heater is connected to the eighth port of the output port.

8. The power battery pack according to claim 7, characterized in that: The heater includes a first switching device and a second switching device, The first end of the first switching device is connected to the positive electrode of the power battery, the first end of the second switching device is connected to the negative electrode of the power battery, the second end of the first switching device is connected to the seventh port of the output port, and the second end of the second switching device is connected to the eighth port of the output port.

9. The power battery pack according to claim 1, characterized in that: The power battery pack further includes a power battery pack management unit, and the power battery pack management unit is connected in parallel with the power battery.

10. The power battery pack according to claim 1, characterized in that: The power battery pack further includes a switch unit, which controls the power battery to output electric energy, and the switch unit is connected in series with the power battery.

11. A storage circuit, characterized in that: Comprising the power battery pack according to any one of claims 1 to 10, the output port of the power battery pack is connected to a load.

12. The energy storage circuit according to claim 11, characterized in that: It also includes an energy storage element, and the output port of the power battery pack is connected to a load through the energy storage element.

13. The energy storage circuit according to claim 12, characterized in that: The energy storage element comprises a first energy storage element, The first energy storage element is connected to a first port of the output port.

14. The energy storage circuit according to claim 12, characterized in that: The energy storage element comprises a first energy storage element, a second energy storage element, and a third energy storage element. The first energy storage element is connected to a first port of the output port; The second energy storage element is connected to the second port of the output port; The third energy storage element is connected to the third port of the output port.

15. The energy storage circuit according to claim 12, characterized in that: The energy storage element comprises a first energy storage element, The first energy storage element is connected to a fourth port of the output port.

16. The energy storage circuit according to claim 12, characterized in that: The energy storage element comprises a first energy storage element, a second energy storage element, and a third energy storage element. The first energy storage element is connected to a fourth port of the output port; The second energy storage element is connected to the fifth port of the output port; The third energy storage element is connected to the sixth port of the output port.

17. The energy storage circuit according to any one of claims 13 to 16, characterized in that: The seventh port of the output port is connected to the eighth port of the output port and is connected to the load.

18. The energy storage circuit according to claim 13 or 14, characterized in that: One of the fourth port, the fifth port and the sixth port of the output port is connected to the load.

19. The energy storage circuit according to claim 15 or 16, characterized in that: One of the first port, the second port, and the third port of the output port is connected to the load.

20. A vehicle, characterized in that: Comprising the power battery pack as claimed in any one of claims 1 to 10, or the energy storage circuit as claimed in any one of claims 11 to 19.

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