Battery energy processing equipment and vehicle

Abstract

A battery energy processing device and a vehicle. The device includes an inverter, an energy storage element, and a controller. In a first preset state, the controller is used to control the inverter to enable the energy storage element to be charged and discharged by the battery, thereby realizing self-heating of the battery, and in a second preset state, at least a part of the energy storage element and at least a part of the inverter jointly form an adaptive voltage charger, and the controller is used to control the adaptive voltage charger to charge the battery.

Description

Technical Field

[0001] Cross - reference to related applications This disclosure claims the priority and benefit of Chinese Patent Application No. 202210583659.9, filed on May 25, 2022, and titled "BATTERY ENERGY PROCESSING APPARATUS AND VEHICLE". The entire content of the above - referenced application is incorporated herein by reference.

[0002] This disclosure relates to the field of vehicle technology, and more particularly, to a battery energy processing apparatus and a vehicle.

Background Art

[0003] The power battery installed in an electric vehicle has significant performance degradation during charging and discharging in a low - temperature environment. As a result, the capabilities of the drive system or the charging system are limited in a low - temperature environment, significantly deteriorating the user experience.

[0004] To reduce the limitations of the low - temperature environment imposed on the power battery, several heating solutions for the power battery have been proposed. Also, the rapid - charging function for the power battery is an essential function of new - energy vehicles.

[0005] Therefore, it is an urgent task at present to explore a technical solution that takes both charging and heating into account.

Summary of the Invention

Problems to be Solved by the Invention

[0006] To overcome the problems in the prior art, this disclosure provides a battery energy processing apparatus and a vehicle.

Means for Solving the Problems

[0007] To achieve this object, in a first aspect, this disclosure provides a battery energy processing apparatus, and the battery energy processing apparatus includes An inverter, wherein the first terminal of the inverter is configured to be connected to a battery, An energy storage element wherein the first terminal of the energy storage element is configured to be connected to an external power supply device, and the second terminal of the energy storage element is connected to the second terminal of the first terminal of an inverter, The controller connected to the third terminal of the inverter and Includes.

[0008] In the first preset state, the controller controls the inverter to enable the energy storage element to be charged and discharged by the battery, thereby achieving battery self-heating.

[0009] In the second preset state, at least a portion of the energy storage element and at least a portion of the inverter jointly form an adaptive voltage charger, and the controller controls the adaptive voltage charger to charge the battery.

[0010] Optionally, the inverter includes at least two phase bridge arms, the energy storage element includes at least two coils, the number of at least two phase bridge arms is the same as the number of at least two coils, the number of at least one of the at least two bridge arms is the same as the number of at least one of the at least two coils, and the at least one phase bridge arm and at least one coil jointly form an adaptive voltage charger.

[0011] Optionally, the first bus terminal of at least two-phase bridge arms is connected to the positive terminal of a battery, and the second bus terminal of at least two-phase bridge arms is connected to the negative terminal of a battery and the negative terminal of an external power supply device.

[0012] The second terminals of at least two coils are connected to the midpoint of at least two phase bridge arms, and the first terminals of at least two coils are connected to each other to form a neutral point, which is configured to be connected to the positive terminal of an external power supply device.

[0013] Optionally, in a first preset state, the controller controls at least two of the at least two phase bridge arms to enable the coils connected to at least two of the at least two coils to be charged and discharged by the battery, thereby achieving battery self-heating.

[0014] Optionally, when the voltage of an external power supply device is lower than the battery voltage, in a second preset state, at least one of the two phase bridge arms and at least one of the two coils jointly form an adaptive voltage charger, and the controller charges at least one coil by controlling the lower bridge arm of at least one phase bridge arm to turn on the upper bridge arm of at least one phase bridge arm so that the upper bridge arm of at least one phase bridge arm is turned off.

[0015] Optionally, when the voltage of an external power supply device is lower than the battery voltage, in a second preset state, after at least one coil has been charged, the controller further boost-charges the battery by controlling at least one phase of the bridge arm to turn off the lower bridge arm and controlling the current to pass through the freewheel diode of at least one phase of the bridge arm's upper bridge arm.

[0016] Optionally, boost charging the battery by controlling the current to pass through a freewheel diode on at least one phase of the bridge arm includes controlling the insulated-gate bipolar transistor on at least one phase of the bridge arm to remain off-center, and controlling the current to pass through a freewheel diode on at least one phase of the bridge arm, thereby boost charging the battery.

[0017] Optionally, when the voltage of the external power supply device is not lower than the battery voltage, in a second preset state, the controller controls the insulated-gate bipolar transistors of the upper and lower bridge arms of at least two phases of the bridge arm to remain off-center, thereby controlling the current to pass through the freewheeling diode of the upper bridge arm of at least two phases of the bridge arm, and directly charging the battery.

[0018] Optionally, the device further includes at least two first switches, the first terminals of at least two first switches configured to be connected to the positive terminal of an external power supply device, and the second terminals of at least two first switches connected in a one-to-one correspondence to the first terminals of at least two coils.

[0019] Optionally, in a first preset state, the controller controls to close the first switches connected to at least two of the coils of at least two of the at least two first switches, and controls at least two phase bridge arms connected to at least two of the coils of at least two phase bridge arms, thereby enabling the at least two coils to be charged and discharged by the battery, and thus achieving battery self-heating.

[0020] In a second preset state, at least one of at least two coils and at least one phase bridge arm connected in correspondence with the at least one coil jointly form an adaptive voltage charger, and the controller controls the adaptive voltage charger to charge the battery by controlling the first switch connected in correspondence with at least one of at least two first switches to close.

[0021] Optionally, in a second preset state, a non-defective bridge arm among at least two phase bridge arms and a coil connected to the non-defective bridge arm among at least two coils jointly form an adaptive voltage charger, and the controller controls the adaptive voltage charger to charge the battery by controlling the adaptive voltage charger to charge the battery by controlling the first switch connected to the coil connected to the defective bridge arm among at least two first switches to open, and the first switch connected to the coil connected to the non-defective bridge arm among at least two first switches to close.

[0022] Optionally, the energy storage element further includes a first capacitor. The first terminal of the first capacitor is connected to the neutral point and the positive terminal of the external power supply device, and the second terminal of the first capacitor is connected to the negative terminal of the battery and the negative terminal of the external power supply device.

[0023] Optionally, in a first preset state, the controller controls at least one of the two bridge arms to enable the first capacitor to be charged and discharged by the battery, thereby achieving battery self-heating.

[0024] In the second preset state, at least one of the at least two coils and at least one phase bridge arm connected in correspondence with the at least one coil jointly form an adaptive voltage charger, and the controller controls the adaptive voltage charger to charge the battery.

[0025] Optionally, the device further includes at least two first switches, wherein the first terminals of the at least two first switches are configured to be connected to the positive electrode of an external power supply device, and the second terminals of the at least two first switches are connected to the first terminals of at least two coils in a one-to-one correspondence.

[0026] In the first preset state, the controller controls the first switch connected to the coil corresponding to the faulty bridge arm among the at least two first switches to open, controls the first switch connected to the coil corresponding to the non-faulty bridge arm among the at least two first switches to close, and controls the non-faulty bridge arms among the at least two-phase bridge arms to enable the first capacitor to be charged and discharged by the battery, thereby realizing self-heating of the battery.

[0027] Optionally, the device further includes at least two first switches, wherein the first terminals of the at least two first switches are configured to be connected to the positive electrode of an external power supply device, and the second terminals of the at least two first switches are connected to the first terminals of at least two coils in a one-to-one correspondence, and a second switch, wherein the first terminal of the second switch is connected to the neutral point, and the second terminal of the second switch is configured to be connected to the positive electrode of the external power supply device.

[0028] The energy storage element further includes a first capacitor. The first terminal of the first capacitor is connected to the neutral point and the positive electrode of the external power supply device, and the second terminal of the first capacitor is connected to the negative electrode of the battery and the negative electrode of the external power supply device.

[0029] ​ In a first preset state, upon receiving a first control command configured to instruct the battery to perform inductive self-heating, the controller controls a first switch connected to at least two of the coils of at least two of the at least two first switches to close, controls a second switch to open, and controls at least two phase bridge arms connected to at least two of the coils of at least two phase bridge arms to enable at least two coils to be charged and discharged by the battery, thereby achieving self-heating of the battery.

[0030] In a first preset state, upon receiving a second control command configured to instruct the battery to undergo capacitive self-heating, the controller controls a first switch connected to a coil connected to at least one phase bridge arm of at least two first switches to close, controls a second switch to close, and controls at least one phase bridge arm of at least two phase bridge arms to allow the first capacitor to be charged and discharged by the battery, thereby achieving battery self-heating.

[0031] In a second embodiment, this disclosure provides a vehicle, and the vehicle is Batteries and Battery energy processing apparatus according to a first aspect of the present disclosure and Includes.

[0032] In the aforementioned technical solution, the battery energy processing device includes an inverter, an energy storage element, and a controller. The inverter is connected to the battery and the energy storage element. The energy storage element is connected to an external power supply device. In a first preset state, the controller controls the inverter to enable the energy storage element to be charged and discharged by the battery, thereby achieving battery self-heating. In this way, in the first preset state, the electricity in the battery is circulated between the battery and the energy storage element by using the energy storage element, enabling battery charging and discharging. This self-heating of the battery is achieved to better maintain the battery temperature and increase the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, thereby ensuring the driving capability of the electric vehicle's drive system. Furthermore, battery self-heating has low energy loss, uniform heat transfer, and high heating efficiency. In a second preset state, at least a portion of the energy storage element and at least a portion of the inverter jointly form an adaptive voltage charger, and the controller controls the adaptive voltage charger to charge the battery. In other words, one battery energy processing device is used for both battery charging and battery self-heating. In this way, multi-functional reuse of battery energy processing devices is achieved, thereby reducing the cost and size of the components.

[0033] Other features and benefits of this disclosure are described in detail below.

[0034] The accompanying drawings are provided for further understanding of this disclosure and constitute part of this specification. The accompanying drawings, along with specific implementations, are used to illustrate this disclosure and do not impose any limitations on this disclosure. [Brief explanation of the drawing]

[0035] [Figure 1] This is a structural block diagram of a battery energy processing device according to an exemplary embodiment. [Figure 2]This is a circuit topology diagram of a battery energy processing device according to an exemplary embodiment. [Figure 3] This is a schematic diagram illustrating the operating principle of boosting and charging a battery in a second preset state, according to an exemplary embodiment. [Figure 4] This is a schematic diagram illustrating the operating principle of boosting and charging a battery in a second preset state, according to an exemplary embodiment. [Figure 5] This is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 6] This is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 7] This is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 8] This is a schematic diagram illustrating the operating principle of heating a battery in a first preset state using the battery energy processing device shown in Figure 7, according to an exemplary embodiment. [Figure 9] This is a schematic diagram illustrating the operating principle of heating a battery in a first preset state using the battery energy processing device shown in Figure 7, according to an exemplary embodiment. [Figure 10] This is a schematic diagram illustrating the operating principle of heating a battery in a first preset state using the battery energy processing device shown in Figure 7, according to an exemplary embodiment. [Figure 11] This is a schematic diagram illustrating the operating principle of heating a battery in a first preset state using the battery energy processing device shown in Figure 7, according to an exemplary embodiment. [Figure 12] This is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 13] This is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Modes for carrying out the invention]

[0036] The specific implementations of this disclosure will be described in detail below with reference to the attached drawings. It should be understood that the specific implementations described herein are used solely for illustrative purposes and are not intended to limit this disclosure.

[0037] Please note that in this disclosure, all actions taken to obtain signals, information, or data are subject to the data protection rules and policies applicable to the country in which the action is taken, as well as the authority granted by the owner of the corresponding device.

[0038] Figure 1 is a structural block diagram of a battery energy processing device according to an exemplary embodiment. As shown in Figure 1, the battery energy processing device 300 may include an inverter 1, an energy storage element 2, and a controller 3.

[0039] The first terminal 11 of the inverter 1 is configured to be connected to the battery 100. The first terminal 21 of the energy storage element 2 is configured to be connected to an external power supply device 200, and the second terminal 22 of the energy storage element 2 is connected to the second terminal 12 of the inverter 1. The controller 3 is connected to the third terminal 13 of the inverter 1. In the first preset state, the controller 3 controls the inverter 1 to enable the energy storage element 2 to be charged and discharged by the battery 100 (for example, in a cyclic charging and discharging manner), thereby achieving self-heating of the battery 100. In the second preset state, at least a portion of the energy storage element 2 and at least a portion of the inverter 1 jointly form an adaptive voltage charger, and the controller 3 controls the adaptive voltage charger to charge the battery 100. The external power supply device 200 may be, for example, a charging pile or a storage battery.

[0040] Cycle charging and discharging means that charging and discharging are repeatedly switched at a specific frequency. Through cycle charging and discharging of a battery, the battery can generate heat, thereby achieving self-heating of the battery.

[0041] In this disclosure, the first preset state is the self-heating state of the battery, and the second preset state is the charged state of the battery.

[0042] In the aforementioned technical solution, the battery energy processing device includes an inverter, an energy storage element, and a controller. The inverter is connected to the battery and the energy storage element. The energy storage element is connected to an external power supply device. In a first preset state, the controller controls the inverter to enable the energy storage element to be charged and discharged by the battery, thereby achieving battery self-heating. In this way, in the first preset state, the electricity in the battery is circulated between the battery and the energy storage element by using the energy storage element, enabling battery charging and discharging. This self-heating of the battery is achieved to better maintain the battery temperature and increase the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, thereby ensuring the driving capability of the electric vehicle's drive system. Furthermore, battery self-heating has low energy loss, uniform heat transfer, and high heating efficiency. In a second preset state, at least a portion of the energy storage element and at least a portion of the inverter jointly form an adaptive voltage charger, and the controller controls the adaptive voltage charger to charge the battery. In other words, one battery energy processing device is used for both battery charging and battery self-heating. In this way, multi-functional reuse of battery energy processing devices is achieved, thereby reducing the cost and size of the components.

[0043] As shown in Figure 2, the inverter 1 includes an N-phase bridge arm B, and the energy storage element 2 includes N coils KM. The number of at least one phase bridge arm in the N-phase bridge arm B is the same as the number of at least one coil in the N coils KM, and the at least one phase bridge arm and the at least one coil together form an adaptive voltage charger.

[0044] For example, as shown in Figure 2, one phase bridge arm of the N-phase bridge arm B and one coil of the N coils KM jointly form an adaptive voltage charger KB.

[0045] As shown in Figure 2, the first bus terminal of the N-phase bridge arm B is connected to the positive terminal of the battery 100, and the second bus terminal of the N-phase bridge arm B is connected to the negative terminal of the battery 100 and the negative terminal of the external power supply device 200. The second terminals 22 of the N coils KM are connected in a one-to-one correspondence to the midpoint of the N-phase bridge arm B, and the first terminals 21 of the N coils KM are connected to each other to form a neutral point P, which is configured to be connected to the positive terminal of the external power supply device 200.

[0046] In this case, in the first preset state, the controller 3 controls at least two of the N-phase bridge arms B to enable the coils connected to at least two of the N coils KM to be charged and discharged by the battery 100, thereby achieving self-heating of the battery 100.

[0047] When the voltage of the external power supply device 200 is lower than the voltage of the battery 100, in a second preset state, at least one phase of the N-phase bridge arm B and at least one coil of the N coils KM jointly form an adaptive voltage charger, and the controller 3 charges at least one coil by controlling the lower bridge arm of at least one phase of the bridge arm to turn on the upper bridge arm of at least one phase of the bridge arm so that the upper bridge arm of at least one phase of the bridge arm is turned off.

[0048] Optionally, in the first preset state, the controller 3 controls the N-phase bridge arm B to enable the N coils KM to be charged and discharged by the battery 100, thereby achieving self-heating of the battery 100. By operating the N-phase bridge arm B and the N coils KM simultaneously in this way, the heating efficiency can be maximized, thereby improving the self-heating effect of the battery.

[0049] In the second preset state, the N coils KM and the N-phase bridge arm B work together to form an adaptive voltage charger, and the controller 3 controls the adaptive voltage charger to charge the battery 100. By operating the N-phase bridge arm B and the N coils simultaneously in this way, the charging efficiency can be maximized, thereby improving the charging efficiency of the battery.

[0050] Although Figure 2 uses an example where N=2, those skilled in the art should understand that the number of bridge arms and coils in Figure 2 are merely examples.

[0051] In the first preset state, the specific process by which the battery energy processing device 300 in Figure 2 heats the battery 100 is as follows: N coils KM are used as current limiting buffers, the way in which the N-phase bridge arm B is turned on is controlled, and the duty cycle of the turned-on bridge arm is adjusted to control the loop current of the battery, allowing the internal resistance of the battery to generate heat and raise the temperature of the battery 100, thereby achieving a controlled temperature rise of the battery 100.

[0052] When the voltage of the external power supply device 200 is lower than the voltage of the battery 100, in a second preset state, at least one phase of the N-phase bridge arm B and at least one coil of the N coils KM jointly form an adaptive voltage charger, and the controller 3 charges at least one coil by controlling the lower bridge arm of at least one phase of the bridge arm to turn on the upper bridge arm of at least one phase of the bridge arm so that the upper bridge arm of at least one phase of the bridge arm is turned off.

[0053] In the second preset state, at least one of the N-phase bridge arms B charges the battery 100. The battery 100 may be charged via boost or directly. The charging mode may be determined according to the voltage of the battery 100 and the voltage of the external power supply device 200.

[0054] Specifically, the controller 3 is further configured to detect whether the voltage of the external power supply device 200 is lower than the voltage of the battery 100. When the voltage of the external power supply device 200 is lower than the voltage of the battery 100, in a second preset state, at least one phase of the N-phase bridge arm B and at least one coil of the N coils KM jointly form an adaptive voltage charger, and the controller 3 charges the coil connected to the turned-on lower bridge arm of the N coils KM (i.e., at least one coil in the adaptive voltage charger) by controlling the lower bridge arm of at least one phase of the bridge arm to be turned off so that the upper bridge arm of at least one phase of the bridge arm is turned off, thereby charging at least one coil. Next, the controller 3 further boost-charges the battery 100 by controlling the lower bridge arm of at least one phase of the bridge arm connected to at least one coil to be turned off, and controlling the current to pass through the freewheeling diode of the upper bridge arm of at least one phase of the bridge arm.

[0055] In one implementation configuration, boost charging the battery 100 by controlling the current to pass through the freewheel diode of at least one phase bridge arm includes controlling the insulated gate bipolar transistor of at least one phase bridge arm not to be turned on, and controlling the current to pass through the freewheel diode of at least one phase bridge arm to boost charging the battery 100.

[0056] When the voltage of the external power supply device 200 is not lower than the voltage of the battery 100, in the second preset state, the controller 3 controls the insulated gate bipolar transistors of the upper and lower bridge arms of the N-phase bridge arm B to remain off-switched, and controls the current to pass through the freewheeling diode of the upper bridge arm of the N-phase bridge arm B, thereby directly charging the battery 100.

[0057] In this way, adaptive voltage charging may be performed automatically according to the voltage of the external power supply device 200 and the voltage of the battery 100. By doing so, both high-voltage and low-voltage external power supply devices can charge the high-voltage battery through the battery energy processing device 300 without the need to configure an additional boost device.

[0058] The operating principle for boosting and charging battery 100 in the second preset state is described in detail below with reference to Figures 3 and 4.

[0059] In Figure 3, the controller 3 controls all upper bridge arms of the N-phase bridge arm B to be turned off and at least one lower bridge arm of the N-phase bridge arm B to be turned on. In this case, current flows from the positive terminal of the external power supply device 200, sequentially through the coil connected to the turned-on lower bridge arm among the N coils KM and the turned-on lower bridge arm of the N-phase bridge arm B, and returns to the negative terminal of the external power supply device 200. In this way, the coil connected to the turned-on lower bridge arm among the N coils KM can be charged. Furthermore, the charging current can be controlled by controlling the number of lower bridge arms turned on and the duty cycle for turning them on, thereby controlling the charging power.

[0060] In one example, it is assumed that the N-phase bridge arm B includes two bridge arms b1 and b2, and N coils KM include two coils H1 and H2. One end of coil H1 is connected to the midpoint of bridge arm b1, and one end of coil H2 is connected to the midpoint of bridge arm b2. The controller 3 then controls all upper bridge arms of bridge arms b1 and b2 to be turned off, and all lower bridge arms of bridge arms b1 and b2 to be turned on. The positive terminal of the external power supply device 200, the N coils KM (i.e., coils H1 and H2), all lower bridge arms of the N-phase bridge arm B (i.e., the lower bridge arms of bridge arms b1 and b2), and the negative terminal of the external power supply device 200 form a loop for charging the N coils KM.

[0061] Next, in Figure 4, the controller 3 controls all the lower bridge arms of the N-phase bridge arm B to be turned off. In this case, current flows from the positive terminal of the external power supply device 200, through the N coils KM, the freewheeling diodes of all the upper bridge arms of the N-phase bridge arm B, the positive terminal of the battery 100, and the negative terminal of the battery 100, and returns to the negative terminal of the external power supply device 200. In this way, the energy of the external power supply device 200 and the N coils KM is transferred to the battery 100, enabling the N coils KM and the external power supply device 200 to charge the battery 100 simultaneously, i.e., boost charging of the battery 100 can be achieved.

[0062] The previous example is used again. In the previous example, all lower bridge arms of bridge arms b1 and b2 are turned on. Therefore, in this case, all lower bridge arms of N-phase bridge arm B (i.e., all upper bridge arms of bridge arms b1 and b2) are turned off. The positive terminal of the external power supply device 200, the N coils KM (i.e., coils H1 and H2), the freewheeling diodes of all upper bridge arms of N-phase bridge arm B (i.e., the upper bridge arms of bridge arms b1 and b2), the battery 100, and the negative terminal of the external power supply device 200 transfer the energy in the N coils KM and the energy received by the external power supply device to the battery 100, i.e., the N coils KM and the external power supply device 200 form a loop that charges the battery 100.

[0063] Therefore, by controlling the lower bridge arm of at least one phase of the N-phase bridge arm B to be alternately turned on or off so that the upper bridge arm of at least one phase of the bridge arm B is turned off, the cyclic operation in the states of Figures 3 and 4 is achieved, thereby completing the boost charge of the battery 100.

[0064] The operating principle for directly charging battery 100 in the second preset state is described in detail below with reference to Figure 4.

[0065] If the voltage of the external power supply device 200 is not lower than the voltage of the battery 100, there is no need to boost charge the external power supply device. In this case, as shown in Figure 4, the controller 3 may be controlled to turn off all the lower bridge arms of the N-phase bridge arm B. In this case, current flows from the positive terminal of the external power supply device 200, through the N coils KM, the freewheeling diodes of all the upper bridge arms of the N-phase bridge arm B, the positive terminal of the battery 100, and the negative terminal of the battery 100, and back to the negative terminal of the external power supply device 200. In this way, the energy of the external power supply device 200 is transferred to the battery 100, enabling the external power supply device 200 to charge the battery 100, i.e., direct charging of the battery 100 can be achieved.

[0066] In one embodiment, the N coils KM are motor windings (e.g., motor windings of a drive motor), and the N-phase bridge arm B is a bridge arm converter. That is, by reusing the existing motor windings and bridge arm converter on the vehicle, various functions can be realized as needed. For example, when the battery requires self-heating or charging, the N coils KM and the N-phase bridge arm B may be used in the various self-heating procedures described herein. When the vehicle needs to be driven, the N coils KM and the N-phase bridge arm B can be switched to control the bridge arm B, allowing the motor corresponding to the motor winding to output power, thereby driving the vehicle. In this way, the motor windings and bridge arm converter of the vehicle can be reused to realize various functions as needed, reducing the cost of the vehicle.

[0067] Furthermore, as shown in Figure 5, the battery energy processing device 300 may further include a second capacitor C2. The first terminal C21 of the second capacitor C2 is connected to the positive terminal of the battery 100 and the first bus terminal of the N-phase bridge arm B, and the second terminal C22 of the second capacitor C2 is connected to the negative terminal of the battery 100 and the second bus terminal of the N-phase bridge arm B. The second capacitor C2 has a voltage stabilization effect, which helps to avoid the impact on components within the battery energy processing device 300 by spikes that occur the moment the battery energy processing device 300 and the battery 100 or external power supply device 200 are turned on.

[0068] The battery energy processing device 300 may further include a third switch K3 and a fourth switch K4 (neither of which are shown). The first terminal of the third switch K3 is connected to the neutral point, and the second terminal of the third switch K3 is connected to the positive terminal of the external power supply device 200. The first terminal of the fourth switch K4 is connected to the negative terminal of the battery 100, and the second terminal of the fourth switch K4 is connected to the negative terminal of the external power supply device 200.

[0069] In this case, in the first preset state, the controller 3 controls both the third switch K3 and the fourth switch K4 to open, and controls at least two of the N-phase bridge arms B to enable the coils connected to at least two of the N coils KM to be charged and discharged by the battery 100, thereby achieving self-heating of the battery 100. In the second preset state, the controller 3 controls both the third switch K3 and the fourth switch K4 to close, and controls the adaptive voltage charger to charge the battery 100.

[0070] As shown in Figure 6, the battery energy processing device 300 further includes N first switches K1. The first terminals K11 of the N first switches K1 are configured to be connected to the positive terminals of the external power supply device 200, and the second terminals K12 of the N first switches K1 are connected in a one-to-one correspondence to the first terminals 21 of the N coils KM.

[0071] In this case, in the first preset state, the controller 3 controls the first switch K1 connected to at least two of the N coils KM among the N first switches K1 to close, and controls the at least two-phase bridge arm connected to at least two of the coils among the N-phase bridge arm B, thereby enabling the at least two coils to be charged and discharged by the battery 100, and thus achieving self-heating of the battery 100. In the second preset state, at least one coil among the N coils KM and at least one-phase bridge arm connected to at least one of the coils jointly form an adaptive voltage charger, and the controller 3 controls the first switch K1 connected to at least one of the N first switches K1 to close, and controls the adaptive voltage charger to charge the battery 100.

[0072] Furthermore, in the battery energy processing device 300 shown in Figure 6, the controller 3 may be further configured to detect whether each phase bridge arm in the N-phase bridge arm B has a malfunction in a second preset state. In the second preset state, the bridge arms of the N-phase bridge arm B that do not have a malfunction and the coils connected to the bridge arms that do not have a malfunction among the N coils KM jointly form an adaptive voltage charger, and the controller 3 controls the adaptive voltage charger to charge the battery 100 by controlling the adaptive voltage charger to open the first switch K1 connected to the coil connected to the malfunctioning bridge arm among the N first switches K1, and by controlling the first switch K1 connected to the coil connected to the bridge arms that do not have a malfunction among the N first switches K1 to close. In this way, if one phase bridge arm of the N-phase bridge arm B has a malfunction, the malfunctioning bridge arm can be turned off through the first switch K1 connected to it, thereby turning off the channel of the bridge arm of that phase. A channel formed by the bridge arm of another phase, which is functioning normally, is used to complete the battery charging, thereby improving the redundancy and fault tolerance performance of the battery energy processing unit 300.

[0073] As shown in Figure 7, the energy storage element 2 further includes a first capacitor C1. The first terminal C11 of the first capacitor C1 is connected to the neutral point P and the positive terminal of the external power supply device 200, and the second terminal C12 of the first capacitor C1 is connected to the negative terminal of the battery 100 and the negative terminal of the external power supply device 200.

[0074] In this case, in the first preset state, the controller 3 controls at least one of the N-phase bridge arms B to enable the first capacitor C1 to be charged and discharged by the battery 100, thereby achieving self-heating of the battery 100. In the second preset state, at least one of the N coils KM and at least one bridge arm connected in correspondence with at least one coil jointly form an adaptive voltage charger, and the controller 3 controls the adaptive voltage charger to charge the battery 100.

[0075] The process of heating the battery 100 in the first preset state using the N-phase bridge arm B, N coils KM, and the first capacitor C1 shown in Figure 7 is described below in detail with reference to Figures 8 to 11.

[0076] First, as shown in Figure 8, in the first process, the controller 3 may control all lower bridge arms of the N-phase bridge arm B to be turned off and at least one upper bridge arm of the N-phase bridge arm B to be turned on. In this case, current flows from the positive terminal of the battery 100, through the turned-on upper bridge arm, the coil connected to the turned-on upper bridge arm, and the first capacitor C1, and finally back to the negative terminal of the battery 100. In this process, the battery 100 is in a discharge state, and the first capacitor C1 receives energy from the coil connected to the turned-on upper bridge arm, causing the voltage to continue to rise, thereby achieving energy storage.

[0077] Next, as shown in Figure 9, in the second process, the controller 3 controls all the upper bridge arms of the N-phase bridge arm B to be turned off, and controls the lower bridge arm of the N-phase bridge arm B that is connected to the coil where the freewheeling current exists to be turned on. In this case, the current flows from the coil where the freewheeling current exists, through the first capacitor C1 and the turned-on lower bridge arm, and finally back to the coil where the freewheeling current exists. In this process, due to the freewheeling effect of the coil, the first capacitor C1 continues to receive energy from the coil, and the voltage continues to rise.

[0078] As shown in Figure 10, in the third process, as the voltage across both terminals of the first capacitor C1 continues to rise, the first capacitor C1 automatically switches from receiving energy from the coil KM to releasing energy to the coil KM. In this case, current flows from the first capacitor C1, through the coil connected to the switched-on lower bridge arm and the switched-on lower bridge arm, and finally back to the first capacitor C1. During this process, the voltage across both terminals of the first capacitor C1 continues to decrease.

[0079] Next, as shown in Figure 11, in the fourth step, the controller 3 may control all the lower bridge arms of the N-phase bridge arm B to be turned off and at least one upper bridge arm of the N-phase bridge arm B to be turned on. In this case, current flows from the first capacitor C1, through the coil connected to the turned-on upper bridge arm, through the turned-on upper bridge arm, through the positive terminal of the battery 100, through the negative terminal of the battery 100, and finally back to the first capacitor C1. During this process, the battery 100 is in a charged state.

[0080] As the voltage across both terminals of the first capacitor C1 continues to decrease, the coil connected to the first capacitor C1 and the turned-on upper bridge arm switches from releasing energy to the battery 100 to receiving energy from the battery 100. In this case, the direction of current flow returns to the direction of flow in the first process, and the battery 100 begins to discharge.

[0081] The aforementioned process may be continuously repeated to enable rapid cyclic charging and discharging between the first capacitor C1 and the battery 100. Due to the presence of the battery's internal resistance, a large amount of heat is generated, causing a rapid increase in the battery's temperature, thereby improving the battery's heating efficiency.

[0082] As shown in Figure 12, the device further includes N first switches K1. The first terminals K11 of the N first switches K1 are configured to be connected to the positive terminals of an external power supply device 200, and the second terminals K12 of the N first switches K1 are connected to the first terminals 21 of N coils KM in a one-to-one correspondence. In this case, the controller 3 may be further configured to detect whether each phase bridge arm in the N-phase bridge arm B is faulty. In this case, in a first preset state, the controller 3 controls the first switches K1 connected to the coils connected to the faulty bridge arms among the N first switches K1 to be opened, and the first switches K1 connected to the coils connected to the non-faulty bridge arms among the N first switches K1 to be closed, thereby controlling the non-faulty bridge arms in the N-phase bridge arm B to enable the first capacitor C1 to be charged and discharged by the battery 100, and thereby achieving self-heating of the battery 100.

[0083] In this way, if one of the N-phase bridge arms B malfunctions, the faulty bridge arm can be switched off through the correspondingly connected first switch K1, thereby turning off the channel of that phase's bridge arm. The channels formed by the other phase's bridge arms, which are functioning normally, are used to complete the self-heating of the battery, thereby improving the redundancy and fault tolerance performance of the battery energy processing unit 300.

[0084] As shown in Figure 13, the battery energy processing device 300 may further include N first switches K1 and second switches K2. The energy storage element 2 further includes a first capacitor C1. The first terminals K11 of the N first switches K1 are configured to be connected to the positive terminals of the external power supply device 200, and the second terminals K12 of the N first switches K1 are connected in a one-to-one correspondence to the first terminals 21 of the N coils KM. The first terminal K21 of the second switch K2 is connected to the neutral point P, and the second terminal K22 of the second switch K2 is configured to be connected to the positive terminal of the external power supply device 200. The first terminal C11 of the first capacitor C1 is connected to the neutral point P and the positive terminal of the external power supply device 200, and the second terminal C12 of the first capacitor C1 is connected to the negative terminal of the battery 100 and the negative terminal of the external power supply device 200.

[0085] In this case, in the first preset state, upon receiving a first control command configured to instruct inductive self-heating of the battery 100, the controller 3 controls the first switch K1, which is connected to at least two of the N coils KM among the N first switches K1, to close the first switch K1, which is connected to at least two of the N coils KM, to open the second switch K2, and controls the at least two-phase bridge arm connected to at least two of the coils among the N-phase bridge arm B, thereby enabling at least two coils to be charged and discharged by the battery 100, and thus achieving self-heating of the battery 100. In the first preset state, upon receiving a second control command configured to instruct dielectric self-heating of the battery 100, the controller 3 controls the first switch K1 connected to a coil connected to at least one phase of the N first switches K1 to close, controls the second switch K2 to close, and controls at least one phase of the N phase bridge arms B to enable the first capacitor C1 to be charged and discharged by the battery 100, thereby achieving self-heating of the battery 100.

[0086] Thus, there are two battery heating methods: induction self-heating and dielectric self-heating. Users need to select the appropriate battery heating method as needed, thereby improving the user experience.

[0087] Although Figures 3 to 13 use an example where N=2, those skilled in the art should understand that the number of bridge arms and coils shown in the figures are merely examples.

[0088] This disclosure further provides a battery energy processing method. This method is In the first preset state, the inverter is controlled to enable the energy storage element to be charged and discharged by the battery, thereby achieving self-heating of the battery. In the second preset state, at least a portion of the energy storage element and at least a portion of the inverter jointly form an adaptive voltage charger, and the adaptive voltage charger is controlled to charge the battery. Includes.

[0089] The first terminal of the inverter is configured to be connected to a battery, and the second terminal is connected to the second terminal of the energy storage element.

[0090] The first terminal of the energy storage element is configured to be connected to an external power supply device.

[0091] Through the aforementioned technical solutions, in the first preset state, the electricity in the battery can be circulated between the battery and the energy storage element by using the energy storage element, thereby enabling charging and discharging of the battery. In this way, self-heating of the battery is achieved, which better maintains the battery temperature and increases the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, thereby ensuring the driving capability of the electric vehicle's drive system. Furthermore, self-heating of the battery has low energy loss, uniform heat transfer, and high heating efficiency. In the second preset state, the aforementioned battery energy processing device may further perform the charging of the battery by reusing the energy storage element and inverter to form an adaptive voltage charger and controlling the inverter. In other words, one battery energy processing device is used for both battery charging and battery self-heating. In this way, multifunctional reuse of the battery energy processing device is achieved, thereby reducing the cost and size of the components.

[0092] Optionally, the inverter includes at least two phase bridge arms, the energy storage element includes at least two coils, the number of at least two phase bridge arms is the same as the number of at least two coils, the number of at least one of the at least two bridge arms is the same as the number of at least one of the at least two coils, and the at least one phase bridge arm and at least one coil jointly form an adaptive voltage charger.

[0093] Optionally, the first bus terminal of at least two-phase bridge arms is connected to the positive terminal of a battery, and the second bus terminal of at least two-phase bridge arms is connected to the negative terminal of a battery and the negative terminal of an external power supply device.

[0094] The second terminals of at least two coils are connected to the midpoint of at least two phase bridge arms, and the first terminals of at least two coils are connected to each other to form a neutral point, which is configured to be connected to the positive terminal of an external power supply device.

[0095] Controlling the inverter to enable the energy storage element to be charged and discharged by the battery is, This includes controlling at least two of the two-phase bridge arms to enable the coils connected to at least two of the two coils connected to the two-phase bridge arms to be charged and discharged by the battery, thereby achieving self-heating of the battery.

[0096] By forming an adaptive voltage charger in at least a portion of the energy storage element and at least a portion of the inverter, and controlling the adaptive voltage charger to charge the battery, This includes causing at least one phase of a two-phase bridge arm and at least one coil of at least two coils to jointly form an adaptive voltage charger, and charging at least one coil by controlling the lower bridge arm of at least one phase of the bridge arm to turn on the upper bridge arm of at least one phase of the bridge arm so that the upper bridge arm of at least one phase of the bridge arm is turned off.

[0097] This method is optional, When the voltage of an external power supply device is below the battery voltage, in a second preset state, the lower bridge arm of at least one phase of the bridge arm is controlled to be turned off after at least one coil has been charged, and the current is controlled to pass through the freewheeling diode of the upper bridge arm of at least one phase of the bridge arm to boost charge the battery.

[0098] Optionally, boost charging the battery by controlling the current to pass through a freewheel diode on at least one phase of the bridge arm includes controlling the insulated-gate bipolar transistor on at least one phase of the bridge arm to remain off-center, and controlling the current to pass through a freewheel diode on at least one phase of the bridge arm, thereby boost charging the battery.

[0099] This method is optional, When the voltage of the external power supply device is not lower than the battery voltage, the second preset state further includes controlling the insulated-gate bipolar transistors of the upper and lower bridge arms of at least two phases of the bridge arm to not be turned on, and controlling the current to pass through the freewheeling diode of the upper bridge arm of at least two phases of the bridge arm to directly charge the battery.

[0100] Optionally, the first terminals of at least two first switches are configured to be connected to the positive terminal of an external power supply device, and the second terminals of at least two first switches are connected in a one-to-one correspondence to the first terminals of at least two coils.

[0101] Controlling at least two of the two phase bridge arms to enable the coils connected to at least two of the two coils connected to the two phase bridge arms to be charged and discharged by the battery is: This includes controlling a first switch to close, which is connected to at least two of the coils of at least two of the at least two first switches, and controlling at least two phase bridge arms connected to at least two of the coils of at least two phase bridge arms, thereby enabling at least two coils to be charged and discharged by the battery, and thereby achieving self-heating of the battery.

[0102] To jointly form an adaptive voltage charger with at least one phase of a two-phase bridge arm and at least one coil of at least two coils, and to charge at least one coil by controlling the lower bridge arm of at least one phase of the bridge arm to be turned on so that the upper bridge arm of at least one phase of the bridge arm is turned off, The method includes causing at least one of at least two coils and at least one phase bridge arm connected in correspondence with the at least one coil to jointly form an adaptive voltage charger, controlling a first switch connected in correspondence with at least one of at least two first switches to close, thereby controlling the adaptive voltage charger to charge the battery.

[0103] Optionally, the first terminals of at least two first switches are configured to be connected to the positive terminal of an external power supply device, and the second terminals of at least two first switches are connected in a one-to-one correspondence to the first terminals of at least two coils.

[0104] To jointly form an adaptive voltage charger with at least one phase of a two-phase bridge arm and at least one coil of at least two coils, and to charge at least one coil by controlling the lower bridge arm of at least one phase of the bridge arm to be turned on so that the upper bridge arm of at least one phase of the bridge arm is turned off, The method includes: causing a non-defective bridge arm among at least two phase bridge arms and a coil connected to the non-defective bridge arm among at least two coils to jointly form an adaptive voltage charger; controlling a first switch connected to the coil connected to the defective bridge arm among at least two first switches to open; and controlling a first switch connected to the coil connected to the coil connected to the non-defective bridge arm among at least two first switches to close; and controlling the adaptive voltage charger to charge a battery.

[0105] Optionally, the energy storage element further includes a first capacitor. The first terminal of the first capacitor is connected to the neutral point and the positive terminal of an external power supply device, and the second terminal of the first capacitor is connected to the negative terminal of a battery and the negative terminal of an external power supply device.

[0106] Controlling the inverter to enable the energy storage element to be charged and discharged by the battery is, This includes controlling at least one of the two-phase bridge arms to enable the first capacitor to be charged and discharged by the battery, thereby achieving self-heating of the battery.

[0107] By forming an adaptive voltage charger in at least a portion of the energy storage element and at least a portion of the inverter, and controlling the adaptive voltage charger to charge the battery, The method includes causing at least one of at least two coils KM and at least one phase bridge arm connected in correspondence with the at least one coil to jointly form an adaptive voltage charger, and controlling the adaptive voltage charger to charge a battery.

[0108] Optionally, the first terminals of at least two first switches are configured to be connected to the positive terminal of an external power supply device, and the second terminals of at least two first switches are connected in a one-to-one correspondence to the first terminals of at least two coils.

[0109] Controlling the inverter to enable the energy storage element to be charged and discharged by the battery is, This includes controlling to open a first switch connected to a coil connected to a faulty bridge arm among at least two first switches, and controlling to close a first switch connected to a coil connected to a non-faulty bridge arm among at least two first switches, thereby enabling the first capacitor to be charged and discharged by the battery, and thereby achieving self-heating of the battery.

[0110] Optionally, the first terminals of at least two first switches are configured to be connected to the positive terminal of an external power supply device, and the second terminals of at least two first switches are connected in a one-to-one correspondence to the first terminals of at least two coils.

[0111] The energy storage element further includes a first capacitor. The first terminal of the first capacitor is connected to the neutral point and the positive terminal of an external power supply device, and the second terminal of the first capacitor is connected to the negative terminal of a battery and the negative terminal of an external power supply device.

[0112] Controlling the inverter to enable the energy storage element to be charged and discharged by the battery is, Self-heating of the battery is achieved by, in response to receiving a first control command configured to instruct the battery to perform inductive self-heating, controlling a first switch connected to at least two coils of at least two of at least two first switches to close, controlling a second switch to open, and controlling at least two phase bridge arms connected to at least two coils of at least two phase bridge arms to allow at least two coils to be charged and discharged by the battery, wherein the first terminal of the second switch is connected to the neutral point, and the second terminal of the second switch is connected to the positive terminal of an external power supply device. In response to receiving a second control command configured to instruct dielectric self-heating of the battery, the system controls the first switch connected to a coil connected to at least one phase bridge arm of at least two first switches to close, controls the second switch to close, and controls at least one phase bridge arm of at least two phase bridge arms to allow the first capacitor to be charged and discharged by the battery, thereby achieving self-heating of the battery. Includes.

[0113] The specific implementation of the steps in the battery energy processing method according to the embodiments of this disclosure is described in detail in the battery energy processing apparatus according to the embodiments of this disclosure. Details will not be described again here.

[0114] Furthermore, this disclosure further provides a vehicle including a battery and the aforementioned battery energy processing device provided in this disclosure.

[0115] Exemplary embodiments of this disclosure are described in detail with reference to the accompanying drawings, but this disclosure is not limited to the specific details of such embodiments. Various simplified modifications to the technical solutions of this disclosure may be made within the scope of the technical idea of ​​this disclosure, and all such simplified modifications shall remain within the scope of protection of this disclosure.

[0116] Furthermore, it should be noted that the specific technical features described in the above-described embodiments may be combined in any suitable way without contradiction. To avoid unnecessary repetition, various possible combinations are not further described in this disclosure.

[0117] Furthermore, various embodiments of this disclosure may be combined without departing from the spirit of this disclosure, and such combinations shall also remain within the scope of this disclosure.

Claims

1. An inverter (1), wherein the first terminal of the inverter (1) is configured to be connected to a battery (100), An energy storage element (2) is configured such that the first terminal of the energy storage element (2) is connected to an external power supply device (200), and the second terminal of the energy storage element (2) is connected to the second terminal of the inverter (1). The inverter (1) is connected to a third terminal and includes a controller (3), In the first state, the controller (3) controls the inverter (1) to enable the energy storage element (2) to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat. In the second state, at least a portion of the energy storage element (2) and at least a portion of the inverter (1) jointly form an adaptive voltage charger, and the controller (3) controls the adaptive voltage charger to charge the battery (100). The inverter (1) comprises at least two-phase bridge arms (B), the energy storage element (2) comprises at least two coils (KM), the number of the at least two-phase bridge arms (B) is the same as the number of the at least two coils (KM), the number of at least one bridge arm among the at least two-phase bridge arms (B) is the same as the number of at least one coil among the at least two coils (KM), and the at least one bridge arm and the at least one coil jointly form the adaptive voltage charger. The first bus terminal of the at least two-phase bridge arm (B) is connected to the positive terminal of the battery (100), and the second bus terminal of the at least two-phase bridge arm (B) is connected to the negative terminal of the battery (100) and the negative terminal of the external power supply device (200). The second terminals of the at least two coils (KM) are connected in a one-to-one correspondence to the midpoint of the at least two-phase bridge arm (B), the first terminals of the at least two coils (KM) are connected to each other to form a neutral point, and the neutral point is configured to be connected to the positive terminal of the external power supply device (200). The present invention further comprises at least two first switches (K1), wherein the first terminals of the at least two first switches (K1) are configured to be connected to the positive terminal of the external power supply device (200), and the second terminals of the at least two first switches (K1) are connected in a one-to-one correspondence to the first terminals of the at least two coils (KM). Battery energy processing device (300).

2. In the first state, the controller (3) controls at least two of the at least two-phase bridge arms (B) to enable the coils connected to the at least two of the at least two coils (KM) to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat, the apparatus (300) according to claim 1.

3. The apparatus (300) according to claim 1, wherein, in the second state, when the voltage of the external power supply device (200) is lower than the voltage of the battery (100), at least one of the at least two-phase bridge arms (B) and at least one of the at least two coils (KM) jointly form the adaptive voltage charger, and the controller (3) charges the at least one coil by controlling the lower bridge arm of the at least one-phase bridge arm to turn on the upper bridge arm of the at least one-phase bridge arm so that the upper bridge arm of the at least one-phase bridge arm is turned off.

4. The apparatus (300) according to claim 3, wherein, in the second state, after the at least one coil has been charged, the controller (3) further controls the lower bridge arm of the at least one phase bridge arm to be turned off and controls the current to pass through the freewheeling diode of the upper bridge arm of the at least one phase bridge arm to boost charge the battery (100).

5. The apparatus (300) according to claim 4, wherein the current is controlled to pass through the freewheeling diode of the upper bridge arm of the at least one phase bridge arm to boost charge the battery (100), and the insulated gate bipolar transistor of the upper bridge arm of the at least one phase bridge arm is controlled not to be turned on, and the current is controlled to pass through the freewheeling diode of the upper bridge arm of the at least one phase bridge arm to boost charge the battery (100).

6. The apparatus (300) according to claim 3, wherein, in the second state, when the voltage of the external power supply device (200) is not lower than the voltage of the battery (100), the controller (3) controls the insulated gate bipolar transistors of the upper and lower bridge arms of the at least two-phase bridge arm (B) to not be turned on, and controls the current to pass through the freewheeling diode of the upper bridge arm of the at least two-phase bridge arm (B) to directly charge the battery (100).

7. In the first state described above, the controller (3) controls the first switch (K1) connected to at least two of the coils (KM) of the at least two first switches (K1) to close, and controls the at least two phase bridge arm (B) connected to the at least two coils of the at least two phase bridge arm (B) to allow the at least two coils to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat. In the second state, at least one of the at least two coils (KM) and at least one phase bridge arm connected in correspondence with the at least one coil jointly form the adaptive voltage charger, and the controller (3) controls the first switch (K1) connected in correspondence with the at least one of the at least two first switches (K1) to close, thereby controlling the adaptive voltage charger to charge the battery (100), the apparatus (300) according to claim 1.

8. In the second state, the device (300) according to claim 1, wherein the non-defective bridge arm (B) among the at least two phase bridge arms (B) and the coil among the at least two coils (KM) connected to the non-defective bridge arm of the at least two phase bridge arms jointly form the adaptive voltage charger, and the controller (3) controls the first switch (K1) connected to the coil connected to the defective bridge arm among the at least two first switches (K1) to open, and controls the first switch (K1) connected to the coil connected to the non-defective bridge arm among the at least two first switches (K1) to close, thereby controlling the adaptive voltage charger to charge the battery (100).

9. The energy storage element (2) further comprises a first capacitor (C1), The apparatus (300) according to claim 1, wherein the first terminal of the first capacitor (C1) is connected to the neutral point and the positive terminal of the external power supply device (200), and the second terminal of the first capacitor (C1) is connected to the negative terminal of the battery (100) and the negative terminal of the external power supply device (200).

10. In the first state, the controller (3) controls at least one of the at least two-phase bridge arms (B) to enable the first capacitor (C1) to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat. In the second state, at least one of the at least two coils (KM) and at least one phase bridge arm connected in correspondence with the at least one coil jointly form the adaptive voltage charger, and the controller (3) controls the adaptive voltage charger to charge the battery (100), the apparatus (300) according to claim 9.

11. An inverter (1), wherein the first terminal of the inverter (1) is configured to be connected to a battery (100), An energy storage element (2) is configured such that the first terminal of the energy storage element (2) is connected to an external power supply device (200), and the second terminal of the energy storage element (2) is connected to the second terminal of the inverter (1). The inverter (1) is connected to a third terminal and includes a controller (3), In the first state, the controller (3) controls the inverter (1) to enable the energy storage element (2) to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat. In the second state, at least a portion of the energy storage element (2) and at least a portion of the inverter (1) jointly form an adaptive voltage charger, and the controller (3) controls the adaptive voltage charger to charge the battery (100). The inverter (1) comprises at least two-phase bridge arms (B), the energy storage element (2) comprises at least two coils (KM), the number of the at least two-phase bridge arms (B) is the same as the number of the at least two coils (KM), the number of at least one bridge arm among the at least two-phase bridge arms (B) is the same as the number of at least one coil among the at least two coils (KM), and the at least one bridge arm and the at least one coil jointly form the adaptive voltage charger. The first bus terminal of the at least two-phase bridge arm (B) is connected to the positive terminal of the battery (100), and the second bus terminal of the at least two-phase bridge arm (B) is connected to the negative terminal of the battery (100) and the negative terminal of the external power supply device (200). The second terminals of the at least two coils (KM) are connected in a one-to-one correspondence to the midpoint of the at least two-phase bridge arm (B), the first terminals of the at least two coils (KM) are connected to each other to form a neutral point, and the neutral point is configured to be connected to the positive terminal of the external power supply device (200). The energy storage element (2) further comprises a first capacitor (C1), The first terminal of the first capacitor (C1) is connected to the neutral point and the positive terminal of the external power supply device (200), and the second terminal of the first capacitor (C1) is connected to the negative terminal of the battery (100) and the negative terminal of the external power supply device (200). The system further comprises at least two first switches (K1), wherein the first terminals of the at least two first switches (K1) are configured to be connected to the positive terminal of the external power supply device (200), and the second terminals of the at least two first switches (K1) are connected in a one-to-one correspondence to the first terminals of the at least two coils (KM), In the first state, the controller (3) controls the first switch (K1) connected to the coil connected to the faulty bridge arm among the at least two first switches (K1) to open, the first switch (K1) connected to the coil connected to the non-faulty bridge arm among the at least two first switches (K1) to close, and controls the non-faulty bridge arm among the at least two phase bridge arms (B) to enable the first capacitor (C1) to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat.

12. An inverter (1), wherein the first terminal of the inverter (1) is configured to be connected to a battery (100), An energy storage element (2) is configured such that the first terminal of the energy storage element (2) is connected to an external power supply device (200), and the second terminal of the energy storage element (2) is connected to the second terminal of the inverter (1). The inverter (1) is connected to a third terminal and includes a controller (3), In the first state, the controller (3) controls the inverter (1) to enable the energy storage element (2) to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat. In the second state, at least a portion of the energy storage element (2) and at least a portion of the inverter (1) jointly form an adaptive voltage charger, and the controller (3) controls the adaptive voltage charger to charge the battery (100). The inverter (1) comprises at least two-phase bridge arms (B), the energy storage element (2) comprises at least two coils (KM), the number of the at least two-phase bridge arms (B) is the same as the number of the at least two coils (KM), the number of at least one bridge arm among the at least two-phase bridge arms (B) is the same as the number of at least one coil among the at least two coils (KM), and the at least one bridge arm and the at least one coil jointly form the adaptive voltage charger. The first bus terminal of the at least two-phase bridge arm (B) is connected to the positive terminal of the battery (100), and the second bus terminal of the at least two-phase bridge arm (B) is connected to the negative terminal of the battery (100) and the negative terminal of the external power supply device (200). The second terminals of the at least two coils (KM) are connected in a one-to-one correspondence to the midpoint of the at least two-phase bridge arm (B), the first terminals of the at least two coils (KM) are connected to each other to form a neutral point, and the neutral point is configured to be connected to the positive terminal of the external power supply device (200). At least two first switches (K1), wherein the first terminals of the at least two first switches (K1) are configured to be connected to the positive terminal of the external power supply device (200), and the second terminals of the at least two first switches (K1) are connected in a one-to-one correspondence to the first terminals of the at least two coils (KM), The system further comprises a second switch (K2), the first terminal of which is connected to the neutral point, and the second terminal of which is connected to the positive terminal of the external power supply device (200), The energy storage element (2) further comprises a first capacitor (C1), the first terminal of the first capacitor (C1) being connected to the neutral point and the positive terminal of the external power supply device (200), and the second terminal of the first capacitor (C1) being connected to the negative terminal of the battery (100) and the negative terminal of the external power supply device (200). In the first state, in response to receiving a first control command configured to instruct the battery (100) to perform inductive self-heating, the controller (3) controls the first switch (K1) connected to at least two coils (KM) of the at least two first switches (K1) to close, controls the second switch (K2) to open, and controls the at least two-phase bridge arm (B) connected to the at least two coils of the at least two-phase bridge arm (B) to allow the at least two coils to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat. In the first state, in response to receiving a second control command configured to instruct dielectric self-heating of the battery (100), the controller (3) controls the first switch (K1) connected to a coil connected to at least one phase bridge arm of the at least two first switches (K1) to close, controls the second switch (K2) to close, and controls at least one phase bridge arm of the at least two phase bridge arms (B) to allow the first capacitor (C1) and the battery (100) to be charged and discharged by the battery (100), thereby causing the battery (100) to self-heat.

13. Battery (100) and A battery energy processing apparatus (300) according to any one of claims 1 to 12 and A vehicle equipped with the following features.

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