Battery energy processing device 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 priority to and the benefit of Chinese Patent Application No. 202210583659.9, entitled "BATTERY ENERGY PROCESSING APPARATUS AND VEHICLE," filed on May 25, 2022. The entire contents of the above-referenced application are incorporated herein by reference.

[0002] The present disclosure relates to the field of vehicle technology, and in particular to battery energy processing devices and vehicles. [Background technology]

[0003] Power batteries installed in electric vehicles have a significant performance degradation when charging and discharging in low temperature environments. As a result, the capabilities of the drive system or charging system are limited in low temperature environments, significantly degrading the user experience.

[0004] In order to reduce the low temperature environment limitations imposed on the power battery, some heating solutions for the power battery have been proposed. In addition, the fast charging function for the power battery is also a required function for new energy vehicles.

[0005] Therefore, there is currently an urgent need to find a technical solution that takes into account both charging and heating. Summary of the Invention [Problem to be solved by the invention]

[0006] To overcome problems in the prior art, the present disclosure provides a battery energy processing device and a vehicle. [Means for solving the problem]

[0007] To this end, in a first aspect, the present disclosure provides a battery energy processing device, comprising: an inverter, a first terminal of the inverter configured to be connected to the battery; an energy storage element, a first terminal of the energy storage element configured to be connected to an external power supply device and a second terminal of the energy storage element connected to a second terminal of the first terminal of the inverter; A controller connected to the third terminal of the inverter Includes.

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

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

[0010] Optionally, the inverter includes bridge arms for at least two phases, and the energy storage element includes at least two coils, a number of the bridge arms for the at least two phases is equal to a number of the at least two coils, and a number of the bridge arms for at least one phase of the bridge arms for the at least two phases is equal to a number of at least one coil of the at least two coils, and the bridge arms for the at least one phase and the at least one coil collectively form an adaptive voltage charger.

[0011] Optionally, first bus terminals of the bridge arms of at least two phases are connected to a positive terminal of the battery and second bus terminals of the bridge arms of at least two phases are connected to a negative terminal of the battery and a negative terminal of the external power device.

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

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

[0014] Optionally, when the voltage of the external power device is lower than the voltage of the battery, in a second preset state, the bridge arm of at least one phase of the at least two phases and the at least one coil of the at least two coils jointly form an adaptive voltage charger, and the controller controls an upper bridge arm of the at least one phase bridge arm to be turned off and a lower bridge arm of the at least one phase bridge arm to be turned on to charge the at least one coil.

[0015] Optionally, when a voltage of the external power device is lower than a voltage of the battery, in the second preset state, after the at least one coil is charged, the controller further controls a lower bridge arm of the at least one phase bridge arm to be turned off, and controls a current to pass through a freewheeling diode of an upper bridge arm of the at least one phase bridge arm, to boost-charge the battery.

[0016] Optionally, controlling the current to pass through a freewheeling diode of the upper bridge arm of the bridge arm of at least one phase to boost-charge the battery includes controlling an insulated gate bipolar transistor of the upper bridge arm of the at least one phase to not be turned on, and controlling the current to pass through a freewheeling diode of the upper bridge arm of the at least one phase to boost-charge the battery.

[0017] Optionally, when the voltage of the external power device is not lower than the voltage of the battery, in the second preset state, the controller controls the insulated gate bipolar transistors of the upper and lower bridge arms of the bridge arms of at least two phases not to be turned on, and controls the current to pass through the freewheeling diodes of the upper bridge arms of the bridge arms of at least two phases to directly charge the battery.

[0018] Optionally, the apparatus further includes at least two first switches, where first terminals of the at least two first switches are configured to be connected to a positive pole of the external power device, and second terminals of the at least two first switches are connected to first terminals of the at least two coils in a one-to-one corresponding relationship.

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

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

[0021] Optionally, in a second preset state, a bridge arm of the at least two phases having no defect and a coil connected to the bridge arm of the at least two coils jointly form an adaptive voltage charger, and the controller controls a first switch connected corresponding to the coil connected to the bridge arm having a defect of the at least two first switches to open, and controls a first switch connected corresponding to the coil connected to the bridge arm of the at least two first switches to close, and controls the adaptive voltage charger to charge the battery.

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

[0023] Optionally, in the first preset state, the controller controls a bridge arm of at least one phase of the 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.

[0024] In a second preset state, at least one coil of the at least two coils and at least one phase bridge arm correspondingly connected to 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 apparatus comprises: The inverter further includes at least two first switches, where first terminals of the at least two first switches are configured to be connected to a positive pole of the external power device and second terminals of the at least two first switches are connected to first terminals of the at least two coils in a one-to-one corresponding relationship.

[0026] In a first preset state, the controller controls a first switch connected corresponding to a coil connected to a bridge arm having a defect among the at least two first switches to open, controls a first switch connected corresponding to a coil connected to a bridge arm having no defect among the at least two first switches to close, and controls a bridge arm having no defect among the at least two-phase bridge arms to allow the first capacitor to be charged and discharged by the battery, thereby realizing self-heating of the battery.

[0027] Optionally, the apparatus comprises: at least two first switches, a first terminal of which is configured to be connected to a positive pole of an external power device, and a second terminal of which is connected to first terminals of the at least two coils in a one-to-one correspondence; a second switch, a first terminal of the second switch being configured to be connected to a neutral point and a second terminal of the second switch being configured to be connected to a positive pole of an external power device; Further includes:

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

[0029] In response to receiving a first control command configured to instruct inductive self-heating of the battery in a first preset state, the controller controls a first switch correspondingly connected to at least two coils of the at least two coils 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 coils of the at least two-phase bridge arms to allow the at least two coils to be charged and discharged by the battery, thereby achieving self-heating of the battery.

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

[0031] In a second aspect, the present disclosure provides a vehicle, the vehicle comprising: Batteries and A battery energy processing device according to a first aspect of the present disclosure; Includes.

[0032] In the above 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 allow the energy storage element to be charged and discharged by the battery, thereby realizing self-heating of the battery. In this way, 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 to realize charging and discharging of the battery. In this way, the self-heating of the battery is realized to better maintain the temperature of the battery and increase the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, thereby ensuring the driving capability of the driving system of the electric vehicle. In addition, the self-heating of the battery has small energy loss, uniform heat transfer, and high heating efficiency. In addition, 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 controls the adaptive voltage charger to charge the battery. In other words, one battery energy processing device is used for both charging the battery and self-heating the battery. In this way, multi-functional reuse of the battery energy processing device is realized, thereby reducing component costs and size.

[0033] Other features and advantages of the present disclosure are detailed in the detailed description that follows.

[0034] The accompanying drawings are provided for a further understanding of the present disclosure and constitute a part of this specification. The accompanying drawings, together with specific implementations, are used to explain the present disclosure and are not intended to impose limitations thereon. [Brief description of the drawings]

[0035] [Figure 1] FIG. 2 is a structural block diagram of a battery energy processing device according to an exemplary embodiment. [Diagram 2]FIG. 2 is a circuit topology diagram of a battery energy processor according to an exemplary embodiment. [Diagram 3] FIG. 2 is a schematic diagram of the operating principle of boost charging a battery in a second preset state according to an exemplary embodiment. [Figure 4] FIG. 2 is a schematic diagram of the operating principle of boost charging a battery in a second preset state according to an exemplary embodiment. [Diagram 5] FIG. 2 is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 6] FIG. 2 is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 7] FIG. 2 is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 8] FIG. 8 is a schematic diagram of the operating principle of heating a battery by the battery energy treatment device shown in FIG. 7 in a first preset state according to an exemplary embodiment. [Figure 9] FIG. 8 is a schematic diagram of the operating principle of heating a battery by the battery energy treatment device shown in FIG. 7 in a first preset state according to an exemplary embodiment. [Figure 10] FIG. 8 is a schematic diagram of the operating principle of heating a battery by the battery energy treatment device shown in FIG. 7 in a first preset state according to an exemplary embodiment. [Figure 11] FIG. 8 is a schematic diagram of the operating principle of heating a battery by the battery energy treatment device shown in FIG. 7 in a first preset state according to an exemplary embodiment. [Figure 12] FIG. 2 is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. [Figure 13] FIG. 2 is a circuit topology diagram of a battery energy processing device according to another exemplary embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] Hereinafter, specific implementations of the present disclosure will be described in detail with reference to the accompanying drawings. It should be understood that the specific implementations described in this specification are merely used to explain and clarify the present disclosure, and are not intended to limit the present disclosure.

[0037] It should be noted that in this disclosure, all acts of acquiring signals, information or data are performed under the premise of complying with the data protection regulations and policies corresponding to the country in which such acts are performed, as well as the authorizations granted by the owner of the corresponding device.

[0038] 1 is a structural block diagram of a battery energy processing device according to an exemplary embodiment. As shown in FIG. 1, a 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 the 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 a first preset state, the controller 3 controls the inverter 1 to allow the energy storage element 2 to be charged and discharged by the battery 100 (e.g., charged and discharged in a cyclical manner), thereby realizing self-heating of the battery 100. In a second preset state, at least a part of the energy storage element 2 and at least a part 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] Cycling means that charging and discharging are repeatedly switched at a certain frequency. Through cyclic charging and discharging of the battery, the battery can generate heat, thereby realizing self-heating of the battery.

[0041] In the present disclosure, the first preset state is a self-heating state of the battery, and the second preset state is a charging state of the battery.

[0042] In the above 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 allow the energy storage element to be charged and discharged by the battery, thereby realizing self-heating of the battery. In this way, 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 to realize charging and discharging of the battery. In this way, the self-heating of the battery is realized to better maintain the temperature of the battery and increase the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, thereby ensuring the driving capability of the driving system of the electric vehicle. In addition, the self-heating of the battery has small energy loss, uniform heat transfer, and high heating efficiency. In addition, 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 controls the adaptive voltage charger to charge the battery. In other words, one battery energy processing device is used for both charging the battery and self-heating the battery. In this way, multi-functional reuse of the battery energy processing device is realized, thereby reducing component costs and size.

[0043] 2, the inverter 1 includes an N-phase bridge arm B, and the energy storage element 2 includes N coils KM. The number of bridge arms of at least one phase among the N-phase bridge arms B is equal to the number of at least one coil among the N coils KM, and the bridge arms of at least one phase and the at least one coil jointly form an adaptive voltage charger.

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

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

[0046] In this case, in the first preset state, the controller 3 controls the bridge arms of at least two phases among the N-phase bridge arms B to enable the coils connected to the bridge arms of at least two phases among 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 bridge arm of the N-phase bridge arms B and at least one coil of the N coils KM jointly form an adaptive voltage charger, and the controller 3 controls the upper bridge arm of the at least one phase bridge arm to be turned off and the lower bridge arm of the at least one phase bridge arm to be turned on to charge the at least one coil.

[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 realizing self-heating of the battery 100. By operating the N-phase bridge arm B and the N coils KM simultaneously in this manner, 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 jointly 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 manner, the charging efficiency can be maximized, thereby improving the charging efficiency of the battery.

[0050] In FIG. 2, an example of N=2 is used, however, one skilled in the art should understand that the number of bridge arms and the number of coils in FIG. 2 are merely examples.

[0051] In the first preset state, the specific process of heating the battery 100 by the battery energy processing device 300 in FIG. 2 is as follows: N coils KM are used as current-limiting buffer devices, the way in which the bridge arm B of N phase is turned on is controlled, and the duty ratio 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 to increase the temperature of the battery 100, and thus implementing a controlled temperature increase 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 bridge arm of the N-phase bridge arms B and at least one coil of the N coils KM jointly form an adaptive voltage charger, and the controller 3 controls the upper bridge arm of the at least one phase bridge arm to be turned off and the lower bridge arm of the at least one phase bridge arm to be turned on to charge the at least one coil.

[0053] In the second preset state, at least one bridge arm of the N-phase bridge arm B charges the battery 100. The battery 100 may be boost-charged or directly charged. 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 the second preset state, at least one bridge arm of the N-phase bridge arms B and at least one coil of the N coils KM jointly form an adaptive voltage charger, and the controller 3 controls the upper bridge arm of the at least one phase bridge arm to be turned off and the lower bridge arm of the at least one phase bridge arm to be turned on to charge the at least one coil, thereby charging 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). Then, the controller 3 further controls the lower bridge arm of the at least one phase bridge arm connected corresponding to the at least one coil to be turned off, and controls the current to pass through the freewheel diode of the upper bridge arm of the at least one phase bridge arm to boost-charge the battery 100.

[0055] In one implementation, boost-charging the battery 100 by controlling the current to pass through a freewheeling diode of the upper bridge arm of the bridge arm of at least one phase includes controlling an insulated gate bipolar transistor of the upper bridge arm of the at least one phase bridge arm not to be turned on, and controlling the current to pass through a freewheeling diode of the upper bridge arm of the at least one phase bridge arm to boost-charge 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 bridge arm B of the N phase not to be turned on, and controls the current to pass through the freewheel diode of the upper bridge arm of bridge arm B of the N phase, thereby directly charging the battery 100.

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

[0058] The operating principle of boost charging the battery 100 in the second preset state will be described in detail below with reference to FIGS.

[0059] In FIG. 3, the controller 3 controls all upper bridge arms of the bridge arm B of the N phase to be turned off, and controls at least one lower bridge arm of the bridge arm B of the N phase to be turned on. In this case, a current flows from the positive pole of the external power supply device 200, flows through the coils connected to the turned-on lower bridge arms of the N coils KM and the turned-on lower bridge arms of the bridge arm B of the N phase in order, and returns to the negative pole of the external power supply device 200. In this way, the coils connected to the turned-on lower bridge arms of the N coils KM can be charged. In addition, by controlling the number of the lower bridge arms to be turned on and the duty ratio at which they are turned on, the charging current can be controlled, and thus the charging power can be controlled.

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

[0061] 4, the controller 3 controls all the lower bridge arms of the bridge arm B of the N phase to be turned off. In this case, the current flows from the positive electrode of the external power supply device 200, passes through the N coils KM, the freewheeling diodes of all the upper bridge arms of the bridge arm B of the N phase, the positive electrode of the battery 100, and the negative electrode of the battery 100, and returns to the negative electrode 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, thereby realizing the N coils KM and the external power supply device 200 to simultaneously charge the battery 100, that is, the boost charging of the battery 100 can be realized.

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

[0063] Therefore, by controlling the upper bridge arm of at least one of the bridge arms B of the N phases to be turned off and the lower bridge arm of at least one of the bridge arms to be alternately turned on or off, the cyclic operation in the states of FIGS. 3 and 4 is realized to complete the boost charging of the battery 100.

[0064] The operating principle of directly charging the battery 100 in the second preset state is detailed below with reference to FIG.

[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 FIG. 4, the controller 3 may control all lower bridge arms of the bridge arm B of the N phase to be turned off. In this case, the current flows from the positive electrode of the external power supply device 200, flows through the N coils KM, the freewheeling diodes of all upper bridge arms of the bridge arm B of the N phase, the positive electrode of the battery 100, and the negative electrode of the battery 100 in sequence, and returns to the negative electrode 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, thereby realizing the external power supply device 200 charging the battery 100, that is, the direct charging of the battery 100 can be realized.

[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, the existing motor windings and bridge arm converter on the vehicle can be reused to realize various functions as needed. For example, when the battery needs to be self-heated or charged, the N coils KM and the N-phase bridge arm B may be used in various self-heating procedures described in this disclosure. 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 and enable 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, and the cost of the vehicle is reduced.

[0067] 5, the battery energy processing device 300 may further include a second capacitor C2. A first terminal C21 of the second capacitor C2 is connected to the positive electrode of the battery 100 and a first bus terminal of the bridge arm B of the N phase, and a second terminal C22 of the second capacitor C2 is connected to the negative electrode of the battery 100 and a second bus terminal of the bridge arm B of the N phase. The second capacitor C2 has a voltage stabilizing effect, which makes it possible to prevent the battery energy processing device 300 and the components in the battery energy processing device 300 from being affected by a spike generated at the moment when the battery 100 or the external power supply device 200 is turned on.

[0068] In addition, the battery energy processing device 300 may further include a third switch K3 and a fourth switch K4 (both not shown). A first terminal of the third switch K3 is connected to the neutral point, and a second terminal of the third switch K3 is connected to the positive pole of the external power supply device 200. A first terminal of the fourth switch K4 is connected to the negative pole of the battery 100, and a second terminal of the fourth switch K4 is connected to the negative pole of the external power supply device 200.

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

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

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

[0072] Also, in the battery energy processing device 300 shown in FIG. 6, the controller 3 may be further configured to detect whether the bridge arms of each phase in the bridge arms B of N phases have a defect in the second preset state. In the second preset state, the bridge arms of the bridge arms B of N phases that do not have a defect and the coils connected to the bridge arms of the N coils KM jointly form an adaptive voltage charger, and the controller 3 controls the first switch K1 connected corresponding to the coils connected to the bridge arms having a defect among the N first switches K1 to be opened, controls the first switch K1 connected corresponding to the coils connected to the bridge arms having a defect among the N first switches K1 to be closed, and controls the adaptive voltage charger to charge the battery 100. In this way, when a bridge arm of one phase of the bridge arms B of N phases has a defect, the bridge arm having the defect is turned off through the first switch K1 connected correspondingly thereto, so that the channel of the bridge arm of this phase can be turned off. The channel formed by the bridge arms of other phases having normal function is used to complete the charging of the battery, thereby improving the redundancy and fault tolerance performance of the battery energy processing device 300.

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

[0074] In this case, in the first preset state, the controller 3 controls at least one bridge arm of the N-phase bridge arms B to allow the first capacitor C1 to be charged and discharged by the battery 100, thereby realizing self-heating of the battery 100. In the second preset state, at least one coil of the N coils KM and at least one bridge arm of the phase connected correspondingly to the 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 using the N-phase bridge arm B, the N coils KM, and the first capacitor C1 of FIG. 7 in the first preset state will be described in detail below with reference to FIGS. 8 to 11.

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

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

[0078] As shown in Fig. 10, in the third process, when the voltage across the first capacitor C1 continues to rise, the first capacitor C1 automatically switches from receiving energy from the coil KM to discharging energy to the coil KM. In this case, the current flows from the first capacitor C1, through the coil connected to the turned-on lower bridge arm and the turned-on lower bridge arm, and finally back to the first capacitor C1. In this process, the voltage across the first capacitor C1 continues to fall.

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

[0080] When the voltage across the first capacitor C1 continues to decrease, the coil connected to the first capacitor C1 and the turned-on upper bridge arm switches from discharging energy to the battery 100 to receiving energy from the battery 100. In this case, the current flow direction is again the same as in the first process, and the battery 100 starts to discharge.

[0081] The above process may be continuously repeated to perform rapid cyclic charging and discharging between the first capacitor C1 and the battery 100. Due to the existence of the internal resistance of the battery, a large amount of heat is generated, causing the temperature of the battery to rise rapidly, thereby improving the heating efficiency of the battery.

[0082] As shown in FIG. 12, the device further includes N first switches K1. A first terminal K11 of the N first switches K1 is configured to be connected to a positive pole of the external power supply device 200, and a second terminal K12 of the N first switches K1 is connected to a first terminal 21 of the N coils KM in a one-to-one correspondence. In this case, the controller 3 may be further configured to detect whether a bridge arm of each phase in the bridge arm B of the N phases has a defect. In this case, in the first preset state, the controller 3 controls the first switch K1 connected corresponding to the coil connected to the bridge arm having a defect among the N first switches K1 to be opened, controls the first switch K1 connected corresponding to the coil connected to the bridge arm not having a defect among the N first switches K1 to be closed, and controls the bridge arm not having a defect among the bridge arms B of the N phases to allow the first capacitor C1 to be charged and discharged by the battery 100, thereby realizing self-heating of the battery 100.

[0083] In this way, if one of the bridge arms B of N phases has a fault, the bridge arm with the fault can be turned off through the correspondingly connected first switch K1 to turn off the channel of the bridge arm of this phase, and the channel formed by the bridge arms of other phases having normal function can be used to complete the self-heating of the battery, thereby improving the redundancy and fault tolerance performance of the battery energy processing device 300.

[0084] As shown in Fig. 13, the battery energy processing device 300 may further include N first switches K1 and a second switch 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 pole of the external power supply device 200, and the second terminals K12 of the N first switches K1 are connected to the first terminals 21 of the N coils KM in a one-to-one correspondence. 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 pole 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 pole of the external power supply device 200, and the second terminal C12 of the first capacitor C1 is connected to the negative pole of the battery 100 and the negative pole of the external power supply device 200.

[0085] In this case, in response to receiving a first control command configured to instruct inductive self-heating of the battery 100 in the first preset state, the controller 3 controls the first switch K1 connected correspondingly to at least two of the N coils KM among the N first switches K1 to close, controls the second switch K2 to open, and controls at least two-phase bridge arms connected to at least two of the N-phase bridge arms B to enable the at least two coils to be charged and discharged by the battery 100, thereby achieving self-heating of the battery 100. In response to receiving a second control command configured to instruct to perform inductive self-heating of the battery 100 in the first preset state, the controller 3 controls the first switch K1 connected correspondingly to a coil connected to the bridge arm of at least one phase among the N first switches K1 to close, controls the second switch K2 to close, and controls the bridge arm of at least one phase among 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, namely, induction self-heating method and dielectric self-heating method. Thus, users need to choose the appropriate battery heating method according to their needs, which will improve the user experience.

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

[0088] The present disclosure further provides a method for battery energy processing, the method comprising: In a first preset state, controlling the inverter to allow the energy storage element to be charged and discharged by the battery, thereby realizing self-heating of the battery; In a second preset state, causing at least a portion of the energy storage element and at least a portion of the inverter to jointly form an adaptive voltage charger, and controlling the adaptive voltage charger to charge the battery. Includes.

[0089] The first terminal of the inverter is configured to be connected to the 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 above technical solution, 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 to realize the charging and discharging of the battery. In this way, the self-heating of the battery is realized to better maintain the temperature of the battery and increase the electrolyte activity and electrochemical reaction rate of the lithium-ion battery, thereby ensuring the driving capability of the driving system of the electric vehicle. In addition, the self-heating of the battery has small energy loss, uniform heat transfer, and high heating efficiency. In addition, in the second preset state, the above-mentioned battery energy processing device may further reuse the energy storage element and the inverter to form an adaptive voltage charger, and control the inverter to charge the battery. In other words, one battery energy processing device is used for both charging the battery and self-heating the battery. In this way, the multi-functional reuse of the battery energy processing device is realized, thereby reducing the cost and size of the components.

[0092] Optionally, the inverter includes bridge arms for at least two phases, and the energy storage element includes at least two coils, a number of the bridge arms for the at least two phases is equal to a number of the at least two coils, and a number of the bridge arms for at least one phase of the bridge arms for the at least two phases is equal to a number of at least one coil of the at least two coils, and the bridge arms for the at least one phase and the at least one coil collectively form an adaptive voltage charger.

[0093] Optionally, first bus terminals of the bridge arms of at least two phases are connected to a positive terminal of the battery and second bus terminals of the bridge arms of at least two phases are connected to a negative terminal of the battery and a negative terminal of the external power device.

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

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

[0096] causing at least a portion of the energy storage element and at least a portion of the inverter to collectively form an adaptive voltage charger and controlling the adaptive voltage charger to charge the battery, The method includes causing at least one bridge arm of the at least two phases and at least one coil of the at least two coils to jointly form an adaptive voltage charger, and controlling an upper bridge arm of the at least one phase bridge arm to be turned off and a lower bridge arm of the at least one phase bridge arm to be turned on to charge the at least one coil.

[0097] Optionally, the method further comprises: The method further includes, when a voltage of the external power supply device is lower than a voltage of the battery, in a second preset state, controlling a lower bridge arm of the bridge arm of at least one phase to be turned off after the at least one coil is charged, and controlling a current to pass through a freewheeling diode of an upper bridge arm of the bridge arm of the at least one phase, thereby boost-charging the battery.

[0098] Optionally, controlling the current to pass through a freewheeling diode of the upper bridge arm of the bridge arm of at least one phase to boost-charge the battery includes controlling an insulated gate bipolar transistor of the upper bridge arm of the at least one phase to not be turned on, and controlling the current to pass through a freewheeling diode of the upper bridge arm of the at least one phase to boost-charge the battery.

[0099] Optionally, the method further comprises: The method further includes controlling, in a second preset state, when a voltage of the external power supply device is not lower than a voltage of the battery, the insulated gate bipolar transistors of the upper and lower bridge arms of the at least two phases of bridge arms not to be turned on, and controlling a current to pass through a freewheeling diode of the upper bridge arm of the at least two phases of bridge arms, thereby directly charging the battery.

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

[0101] Controlling the bridge arms of at least two phases of the at least two phases to enable coils connected to the bridge arms of at least two phases of the at least two coils to be charged or discharged by the battery The method includes controlling first switches connected correspondingly to at least two coils of the at least two coils of the at least two first switches to close, and controlling at least two-phase bridge arms connected to at least two coils of the at least two-phase bridge arms to allow the at least two coils to be charged and discharged by the battery, thereby achieving self-heating of the battery.

[0102] causing at least one bridge arm of the at least two phases and at least one coil of the at least two coils to jointly form an adaptive voltage charger, and controlling an upper bridge arm of the at least one phase bridge arm to be turned off and a lower bridge arm of the at least one phase bridge arm to be turned on to charge the at least one coil; The method includes causing at least one coil of the 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 the at least one coil of the at least two first switches to close, and controlling the adaptive voltage charger to charge the battery.

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

[0104] causing at least one bridge arm of the at least two phases and at least one coil of the at least two coils to jointly form an adaptive voltage charger, and controlling an upper bridge arm of the at least one phase bridge arm to be turned off and a lower bridge arm of the at least one phase bridge arm to be turned on to charge the at least one coil; The method includes controlling a bridge arm having no defect among the at least two phase bridge arms and a coil connected to the bridge arm having no defect among the at least two coils together to form an adaptive voltage charger, controlling a first switch connected to a corresponding coil connected to the bridge arm having a defect among the at least two first switches to be opened, and controlling a first switch connected to a corresponding coil connected to the bridge arm having no defect among the at least two first switches to be closed, and controlling the adaptive voltage charger to charge the battery.

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

[0106] Controlling the inverter to allow the energy storage element to be charged and discharged by the battery and controlling a bridge arm of at least one phase of the 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.

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

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

[0109] Controlling the inverter to allow the energy storage element to be charged and discharged by the battery The method includes controlling to open a first switch connected corresponding to a coil connected to a bridge arm having a defect among the at least two first switches, controlling to close a first switch connected corresponding to a coil connected to a bridge arm having no defect among the at least two first switches, and controlling a bridge arm having no defect among the 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.

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

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

[0112] Controlling the inverter to allow the energy storage element to be charged and discharged by the battery In response to receiving a first control command configured to instruct to perform inductive self-heating on the battery, control a first switch correspondingly connected to at least two coils of the at least two first switches to close, control a second switch to open, and control at least two-phase bridge arms connected to at least two coils of the at least two-phase bridge arms to allow the at least two coils to be charged and discharged by the battery, thereby achieving self-heating of the battery, wherein a first terminal of the second switch is configured to be connected to a neutral point and a second terminal of the second switch is configured to be connected to a positive pole of an external power device; In response to receiving a second control command configured to instruct to perform inductive self-heating on the battery, control a first switch corresponding to a coil connected to a bridge arm of at least one phase of the at least two first switches to be closed, control a second switch to be closed, and control the bridge arm of at least one phase of the at least two phases 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 embodiment of the present disclosure is described in detail in the battery energy processing device according to the embodiment of the present disclosure, and the details will not be described again here.

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

[0115] Although the exemplary embodiments of the present disclosure are described above in detail with reference to the accompanying drawings, the present disclosure is not limited to the specific details in the above embodiments.Various simple modifications may be made to the technical solutions of the present disclosure within the technical spirit of the present disclosure, and all such simple modifications shall fall within the protection scope of the present disclosure.

[0116] It should also be noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.

[0117] In addition, various embodiments of the present disclosure may be combined without departing from the spirit of the present disclosure, and such combinations are also intended to fall within the scope of the present disclosure.

Claims

1. An inverter (1), wherein a first terminal of the inverter (1) is configured to be connected to a battery (100); an energy storage element (2), a first terminal of the energy storage element (2) configured to be connected to an external power supply device (200) and a second terminal of the energy storage element (2) connected to a second terminal of the inverter (1); a controller (3) connected to a third terminal of the inverter (1); Equipped with In a 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), thereby realizing self-heating of the battery (100); In a 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). A battery energy processing device (300).

2. 2. The apparatus (300) of claim 1, wherein the inverter (1) comprises at least two bridge arms (B), the energy storage element (2) comprises at least two coils (KM), the number of the bridge arms (B) of the at least two phases is equal to the number of the at least two coils (KM), the number of bridge arms of at least one phase of the bridge arms (B) of the at least two phases is equal to the number of at least one coil of the at least two coils (KM), and the bridge arms of the at least one phase and the at least one coil jointly form the adaptive voltage charger.

3. A first bus terminal of the at least two phase bridge arms (B) is connected to a positive terminal of the battery (100), and a second bus terminal of the at least two phase bridge arms (B) is connected to a negative terminal of the battery (100) and a negative terminal of the external power device (200); 3. The apparatus (300) of claim 2, wherein second terminals of the at least two coils (KM) are connected to midpoints of the bridge arms (B) of the at least two phases in a one-to-one correspondence, and 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 a positive pole of the external power device (200).

4. 3. The apparatus (300) of claim 2, wherein in the first preset state, the controller (3) controls at least two bridge arms of the at least two phases of the bridge arms (B) to enable coils connected to the at least two bridge arms of the at least two coils (KM) to be charged and discharged by the battery (100), thereby realizing the self-heating of the battery (100).

5. 4. The apparatus (300) of claim 3, wherein, in the second preset state, when a voltage of the external power supply device (200) is lower than a voltage of the battery (100), a bridge arm of at least one phase of the at least two bridge arms (B) and at least one coil of the at least two coils (KM) jointly form the adaptive voltage charger, and the controller (3) controls an upper bridge arm of the at least one bridge arm of the at least one phase to be turned off and a lower bridge arm of the at least one bridge arm of the at least one phase to be turned on to charge the at least one coil.

6. 6. The apparatus (300) of claim 5, wherein, in the second preset state, when the voltage of the external power supply device (200) is lower than the voltage of the battery (100), after the at least one coil is charged, the controller (3) further controls the lower bridge arm of the at least one phase bridge arm to be turned off and controls a current to pass through a freewheeling diode of the upper bridge arm of the at least one phase bridge arm to boost charge the battery (100).

7. 7. The apparatus (300) of claim 6, wherein controlling 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) comprises controlling an insulated gate bipolar transistor of the upper bridge arm of the at least one phase bridge arm not to be turned on, and controlling 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).

8. 6. The apparatus according to claim 5, wherein, in the second preset state, when the voltage of the external power supply device is not lower than the voltage of the battery, the controller controls the insulated gate bipolar transistors of the upper and lower bridge arms of the at least two phases of bridge arms not to be turned on, and controls a current to pass through a freewheeling diode of the upper bridge arm of the at least two phases of bridge arms to directly charge the battery.

9. 9. The apparatus (300) according to any one of claims 3 to 8, further comprising at least two first switches (K1), first terminals of the at least two first switches (K1) configured to be connected to a positive pole of the external power supply device (200) and second terminals of the at least two first switches (K1) connected to the first terminals of the at least two coils (KM) in a one-to-one correspondence.

10. In the first preset state, the controller (3) controls to close first switches (K1) connected correspondingly to at least two of the at least two coils (KM) among the at least two first switches (K1), and controls at least two bridge arms connected to the at least two coils among the at least two bridge arms (B) to enable the at least two coils to be charged and discharged by the battery (100), thereby realizing the self-heating of the battery (100); 10. The apparatus (300) of claim 9, wherein in the second preset state, the at least one coil of the at least two coils (KM) and at least one phase bridge arm connected correspondingly to the at least one coil jointly form the adaptive voltage charger, and the controller (3) controls a first switch (K1) connected correspondingly to the at least one coil of the at least two first switches (K1) to close, and controls the adaptive voltage charger to charge the battery (100).

11. 11. The apparatus (300) according to claim 9 or 10, wherein in the second preset state, a bridge arm of the at least two phases (B) having no defect and a coil connected to the bridge arm of the at least two coils (KM) having no defect jointly form the adaptive voltage charger, and the controller (3) controls a first switch (K1) connected corresponding to a coil connected to the bridge arm having a defect of the at least two first switches (K1) to open and controls a first switch (K1) connected corresponding to a coil connected to the bridge arm of the at least two first switches (K1) to close, thereby controlling the adaptive voltage charger to charge the battery (100).

12. The energy storage element (2) further comprises a first capacitor (C1); 12. The apparatus (300) of claim 3, wherein a first terminal of the first capacitor (C1) is connected to a neutral point and a positive terminal of the external power supply device (200), and a second terminal of the first capacitor (C1) is connected to a negative terminal of the battery (100) and a negative terminal of the external power supply device (200).

13. In the first preset state, the controller (3) controls at least one bridge arm of the at least two bridge arms (B) to enable the first capacitor (C1) to be charged and discharged by the battery (100), thereby realizing the self-heating of the battery (100); 13. The apparatus (300) of claim 12, wherein in the second preset state, at least one coil of the at least two coils (KM) and at least one bridge arm of a phase correspondingly connected to 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).

14. at least two first switches (K1), a first terminal of the at least two first switches (K1) configured to be connected to a positive pole of the external power supply device (200), and a second terminal of the at least two first switches (K1) connected to first terminals of the at least two coils (KM) in a one-to-one correspondence; 14. The apparatus (300) according to claim 12 or 13, wherein in the first preset state, the controller (3) controls to open a first switch (K1) connected corresponding to a coil connected to a bridge arm having a defect among the at least two first switches (K1), controls to close a first switch (K1) connected corresponding to a coil connected to a bridge arm having no defect among the at least two first switches (K1), and controls a bridge arm having no defect among the at least two-phase bridge arms (B) to allow the first capacitor (C1) to be charged and discharged by the battery (100), thereby realizing the self-heating of the battery (100).

15. at least two first switches (K1), a first terminal of the at least two first switches (K1) configured to be connected to a positive pole of the external power supply device (200), and a second terminal of the at least two first switches (K1) connected to first terminals of the at least two coils (KM) in a one-to-one correspondence; a second switch (K2), a first terminal of the second switch (K2) configured to be connected to a neutral point and a second terminal of the second switch (K2) configured to be connected to the positive pole of the external power supply device (200); Further equipped with The energy storage element (2) further comprises a first capacitor (C1), a first terminal of the first capacitor (C1) being connected to the neutral point and the positive electrode of the external power supply device (200), and a second terminal of the first capacitor (C1) being connected to the negative electrode of the battery (100) and the negative electrode of the external power supply device (200); In response to receiving a first control command configured to instruct inductive self-heating of the battery (100) in the first preset state, the controller (3) controls a first switch (K1) connected correspondingly to at least two of the at least two coils (KM) of the at least two first switches (K1) to close, controls the second switch (K2) to open, and controls at least two-phase bridge arms connected to the at least two coils of the at least two-phase bridge arms (B) to enable the at least two coils to be charged and discharged by the battery (100), thereby achieving the self-heating of the battery (100); 15. The apparatus (300) according to claim 3, in response to receiving a second control command configured to instruct to perform inductive self-heating of the battery (100) in the first preset state, the controller (3) controls a first switch (K1) connected corresponding to a coil connected to a bridge arm of at least one phase of the at least two first switches (K1) to close, controls the second switch (K2) to close, and controls the bridge arm of the at least one phase of the at least two bridge arms (B) to enable the first capacitor (C1) and the battery (100) to be charged and discharged by the battery (100), thereby achieving the self-heating of the battery (100).

16. A battery (100); A battery energy treatment device (300) according to any one of claims 1 to 15; A vehicle equipped with.

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