Circuit control method, device, vehicle and storage medium

Abstract

The present disclosure relates to a circuit control method, device, vehicle and storage medium, and relates to the field of transportation technology, including: obtaining the remaining power of the first battery pack and the remaining power of the second battery pack during the alternating discharge of the first battery pack and the second battery pack; wherein, in each alternating discharge cycle, the first battery pack and the second battery pack release power to each other in turn; in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, controlling the power released by the first battery pack to the second battery pack to be greater than the power released by the second battery pack to the first battery pack, and controlling the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal. Using the circuit control method proposed in the present disclosure, it is possible to balance the remaining power of the first battery pack and the second battery pack while ensuring heat balance in the first battery pack and the second battery pack during a long period of charging and discharging.

Description

Technical Field

[0001] The present disclosure relates to the technical field of transportation vehicles, and in particular to a circuit control method, device, vehicle and storage medium. Background Art

[0002] For some means of transportation, such as vehicles, the vehicle can be equipped with a dual battery pack, which can provide more power for the vehicle, thereby increasing the vehicle's range.

[0003] In the related art, when controlling the dual battery packs to perform alternating discharge, there will be an imbalance in the power of the dual battery packs; for any battery pack in the dual battery pack, the heat of the battery pack will also change frequently during the alternating discharge process. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a circuit control method, device, vehicle and storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a circuit control method, including:

[0006] During the process of alternating discharge of the first battery pack and the second battery pack, obtaining the remaining power of the first battery pack and the remaining power of the second battery pack; wherein in each alternating discharge cycle, the first battery pack and the second battery pack release power to each other in turn;

[0007] In response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, the power released by the first battery pack to the second battery pack is controlled to be greater than the power released by the second battery pack to the first battery pack, and the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is controlled to be equal.

[0008] Optionally, in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, controlling the power released by the first battery pack to the second battery pack to be greater than the power released by the second battery pack to the first battery pack includes:

[0009] Controlling a first peak current in a first discharge process in which the first battery pack releases electricity to the second battery pack to increase at a first target value, and controlling a second peak current in a second discharge process in which the second battery pack releases electricity to the first battery pack to decrease at a second target value;

[0010] After the first peak current increases with the first target value and the second peak current decreases with the second target value, the amount of electricity released by the first battery pack to the second battery pack is greater than the amount of electricity released by the second battery pack to the first battery pack.

[0011] Optionally, when the first target value is equal to the second target value, the discharge sums of the first battery pack and the second battery pack in each alternating discharge cycle are equal.

[0012] Optionally, the method further comprises:

[0013] After controlling the first peak current in the first discharge process to increase to the first target value, a third peak current is obtained;

[0014] For a first non-peak current adjacent to the third peak current in the first discharge process, controlling the third peak current to decrease by a first decrease amplitude to obtain the first non-peak current;

[0015] For a second non-peak current that is not adjacent to the third peak current in the first discharge process, a previous non-peak current of the second non-peak current is controlled to decrease by a second decrease amplitude to obtain the second non-peak current; wherein the first decrease amplitude and the second decrease amplitude are less than a preset value.

[0016] Optionally, in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, controlling the power released by the first battery pack to the second battery pack to be greater than the power released by the second battery pack to the first battery pack, and controlling the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal, comprises:

[0017] In response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, and the heat of the first battery pack being different from the heat of the second battery pack, the power released by the first battery pack to the second battery pack is controlled to be greater than the power released by the second battery pack to the first battery pack, and the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is controlled to be equal.

[0018] Optionally, when the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle are equal, the heat of the first battery pack in each alternating discharge cycle is equal to the heat of the second battery pack in each alternating discharge cycle.

[0019] Optionally, the method further comprises:

[0020] In each alternating discharge cycle, the first battery pack is controlled to release electricity to the energy storage module. After the energy storage module releases the electricity released by the first battery pack to the second battery pack, the second battery pack is controlled to release electricity to the energy storage module. The energy storage module releases the electricity released by the second battery pack to the first battery pack.

[0021] Optionally, the method further comprises:

[0022] Acquire a power difference between a remaining power of the first battery pack and a remaining power of the second battery pack;

[0023] According to the mapping relationship between the power difference and the first target value, a first target value corresponding to the power difference is determined.

[0024] According to a second aspect of an embodiment of the present disclosure, there is provided a circuit control device, comprising:

[0025] an acquisition module, configured to acquire the remaining power of the first battery pack and the remaining power of the second battery pack during the process of the first battery pack and the second battery pack being alternately discharged; wherein the first battery pack and the second battery pack are charged with each other in each alternating discharge cycle;

[0026] The response module is configured to control the amount of power released by the first battery pack to the second battery pack to be greater than the amount of power released by the second battery pack to the first battery pack in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, and to control the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal.

[0027] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, comprising:

[0028] processor;

[0029] a memory for storing processor-executable instructions;

[0030] Wherein, the processor is configured to:

[0031] Execute the steps of the circuit control method provided in the first aspect of the embodiment of the present disclosure.

[0032] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the circuit control method provided in the first aspect of the present disclosure are implemented.

[0033] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0034] On the one hand, when the remaining power of the first battery pack is greater than the remaining power of the second battery pack, the power released by the first battery pack to the second battery pack will be controlled to be greater than the power released by the second battery pack to the first battery pack. Therefore, the remaining power of the first battery pack will gradually decrease, and the remaining power of the second battery pack will gradually increase, so that the remaining power of the first battery pack and the second battery pack tend to be balanced, thereby achieving power balance between the first battery pack and the second battery pack.

[0035] Secondly, the heat generated by the electricity released by the second battery pack to the first battery pack in each alternating discharge cycle is equal to the heat generated by the first battery pack charging the electricity, so the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is controlled to be equal, which is also to control the total heat generated by the discharge of the first battery pack in each alternating discharge cycle to be equal to the heat generated by charging. Similarly, the total heat generated by the discharge of the second battery pack in each alternating discharge cycle is also controlled to be equal to the heat generated by charging, thereby avoiding the problems of reduced charging and discharging performance and reduced service life caused by the heat changes of the first battery pack and the second battery pack during the long-term charging and discharging process.

[0036] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0038] Figure 1 The figure is a flow chart of a circuit control method according to an exemplary embodiment.

[0039] Figure 2 is a schematic diagram of a charging and discharging circuit according to an exemplary embodiment.

[0040] Figure 3 is a schematic diagram of a charging and discharging circuit according to an exemplary embodiment.

[0041] Figure 4 The diagram is a schematic diagram showing a first battery pack releasing electricity to a second battery pack in a charge and discharge circuit according to an exemplary embodiment.

[0042] Figure 5 The diagram is a schematic diagram showing a second battery pack releasing electricity to a first battery pack in a charge and discharge circuit according to an exemplary embodiment.

[0043] Figure 6The figure is a schematic diagram showing changes in the remaining power of a first battery pack and a second battery pack in different stages according to an exemplary embodiment.

[0044] Figure 7 The figure is a curve diagram showing the alternating discharge of a first battery pack and a second battery pack in two alternating discharge cycles according to an exemplary embodiment.

[0045] Figure 8 The figure is a curve diagram showing the alternating discharge of a first battery pack and a second battery pack in two alternating discharge cycles according to an exemplary embodiment.

[0046] Fig. 9 The figure is a curve diagram showing the alternating discharge of a first battery pack and a second battery pack in two alternating discharge cycles according to an exemplary embodiment.

[0047] Fig.10 The figure shows a curve graph before a peak value changes and a curve graph after a peak value changes according to an exemplary embodiment.

[0048] Fig.11 is a schematic diagram showing an area between a discharge curve and a horizontal axis according to an exemplary embodiment.

[0049] Fig.12 The diagram is a schematic diagram showing a method of using a carrier frequency signal to adjust the charge and discharge curves of a first battery pack and a second battery pack according to an exemplary embodiment.

[0050] Fig.13 It is a schematic diagram showing that, according to an exemplary embodiment, when the power of the first battery pack and the second battery pack are unbalanced but the heat is balanced, the first battery pack releases power to the power conversion module.

[0051] Fig.14 is a block diagram of a circuit control device according to an exemplary embodiment.

[0052] Fig.15 is a block diagram of a vehicle according to an exemplary embodiment.

[0053] Fig.16 is a block diagram of a chip system according to an exemplary embodiment. DETAILED DESCRIPTION

[0054] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0055] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0056] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0057] Figure 1 is a flow chart of a circuit control method according to an exemplary embodiment. Figure 1 As shown, the circuit control method is applied to a transportation tool, such as a vehicle, and includes the following steps.

[0058] In step S11 , during the process of the first battery pack and the second battery pack being discharged alternately, the remaining power of the first battery pack and the remaining power of the second battery pack are obtained.

[0059] The first battery pack and the second battery pack are power sources for providing electric energy to the vehicle. The first battery pack and the second battery pack have multiple connection modes such as series mode, independent mode and parallel mode.

[0060] In the series mode, the first battery pack Bank1 and the second battery pack Bank2 are connected in series, and the first battery pack Bank1 and the second battery pack Bank2 connected in series supply power to the load on the vehicle, or the charging pile charges the first battery pack Bank1 and the second battery pack Bank2 connected in series. Figure 2 As shown, when the first switch S0 is closed and the second switch S1 and the third switch S2 are disconnected, the current output by the charging pile flows into the power conversion module through the charging port, and then reaches the positive electrode of the first battery pack Bank1 after being converted by the power conversion module. After being transmitted through the first battery pack Bank1 and the second battery pack Bank2 connected in series, it flows out from the negative electrode of the second battery pack Bank2, so that the charging pile charges the first battery pack Bank1 and the second battery pack Bank2 connected in series.

[0061] In independent mode, any battery pack in the first battery pack Bank1 or the second battery pack Bank2 can independently power the vehicle, or the charging station can charge any battery pack in the first battery pack Bank1 or the second battery pack Bank2. Figure 2 and Figure 3 As shown, when the third switch S2 is closed and the first switch S0 and the second switch S1 are disconnected, the current output by the charging pile flows into the power conversion module through the charging port, and then reaches the positive electrode of the second battery pack Bank2 after being converted by the power conversion module, and then flows out from the negative electrode of the second battery pack Bank2, so that the charging pile can charge the second battery pack Bank2 alone; please refer to Figure 2 As shown, when the second switch S1 is closed and the first switch S0 and the third switch S2 are disconnected, the current output by the charging pile flows into the power conversion module through the charging port, and then reaches the positive electrode of the first battery pack Bank1 after being converted by the power conversion module, and then flows out from the negative electrode of the first battery pack Bank1, so that the charging pile can charge the first battery pack Bank1 alone.

[0062] In the parallel mode, the first battery pack Bank1 and the second battery pack Bank2 are connected in parallel, and the first battery pack Bank1 and the second battery pack Bank2 connected in parallel supply power to the load on the vehicle, or the charging pile charges the first battery pack Bank1 and the second battery pack Bank2 connected in parallel. Figure 2 As shown, the first switch S0, the second switch S1 and the third switch S2 are closed, and the current output by the charging pile flows into the power conversion module through the charging port, and then reaches the node where the first battery pack Bank1 and the second battery pack Bank2 are connected in parallel after being converted by the power conversion module, and then is transmitted to the parallel first battery pack Bank1 and the second battery pack Bank2, and then flows out from the negative electrode of the parallel first battery pack Bank1 and the second battery pack Bank2, so that the charging pile charges the parallel first battery pack Bank1 and the second battery pack Bank2.

[0063] Understandably, Figure 2 The power conversion module in the charging pile can convert the AC or DC power input into a DC voltage suitable for charging the battery pack, and can also convert the DC power output by the first battery pack Bank1 and / or the second battery pack Bank2 into DC power suitable for use by the load.

[0064] See also Figure 2As shown, the power conversion module includes two groups of switch tubes and at least one energy storage module. The first group of switch tubes in the two groups of switch tubes is used to turn on or off the circuit between the first battery pack Bank1 and the energy storage module, and the second group of switch tubes in the two groups of switch tubes is used to turn on or off the circuit between the second battery pack Bank2 and the energy storage module. Each group of switch tubes includes at least one switch tube; the energy storage module is used to receive the electricity released by the first battery pack Bank1, and release the electricity released by the first battery pack Bank1 to the second battery pack Bank2, or the energy storage module is used to receive the electricity released by the second battery pack Bank2, and release the electricity released by the second battery pack Bank2 to the first battery pack Bank1. The energy storage module includes at least one energy storage element, which can be an inductor or a capacitor.

[0065] For example, the number of switch tubes in the first group of switch tubes is one, and the switch tube Q1 is turned on; the number of switch tubes in the second group of switch tubes is one, and the switch tube Q4 is turned on, and the energy storage element is an energy storage element L1. At this time, the switch tube Q1 turns on the loop between the energy storage element L1 and the first battery pack Bank1; the switch tube Q4 turns on the loop between the energy storage element and the second battery pack Bank2.

[0066] For example, taking the case where the number of switches in the first group of switch tubes is three, the number of switches in the second group of switch tubes is three, and the energy storage elements are energy storage elements L1~L3, the switch tubes Q1~Q3 respectively turn on the circuit between the energy storage elements L1~L3 and the first battery pack Bank1, and the switch tubes Q4~Q6 respectively turn on the circuit between the energy storage elements L1~L3 and the second battery pack Bank2.

[0067] In the related art, the performance of the battery pack will be reduced in a low temperature environment, thereby affecting the charging and discharging performance of the vehicle. Therefore, an oscillating heating scheme of the first battery pack Bank1 and the second battery pack Bank2 can be adopted to make the first battery pack Bank1 and the second battery pack Bank2 discharge alternately to achieve oscillating heating of the first battery pack Bank1 and the second battery pack Bank2.

[0068] Before introducing the oscillating heating scheme, let's first introduce the neutral line to help understand the oscillating heating scheme. Figure 4 and Figure 5As shown, the neutral line is a bridge for transferring the power of the first battery pack Bank1 to the second battery pack Bank2, and also a bridge for transferring the power of the second battery pack Bank2 to the first battery pack Bank1. One end of the neutral line is connected to the connection point between the first battery pack Bank1 and the second battery pack Bank2, and the other end of the neutral line is connected to the connection point between the first group of switch tubes and the second group of switch tubes. The power on the neutral line is the sum of the power of the first battery pack Bank1 and the power of the second battery pack Bank2.

[0069] In the oscillating heating scheme, taking the first battery pack Bank1 and the second battery pack Bank2 executing a single alternating discharge cycle as an example, the first battery pack Bank1 and the second battery pack Bank2 release power to each other in turn.

[0070] For example, see Figure 4 As shown, in the scenario where the first battery pack Bank1 releases electricity to the second battery pack Bank2, the electricity released by the first battery pack Bank1 is input into the energy storage module (at least one of the inductors L1~L3) through the first group of switch tubes (at least one of the switch tubes Q1~Q3), and the energy storage module then transmits the electricity released by the first battery pack Bank1 to the neutral line. After being transmitted through the neutral line, the electricity reaches the negative electrode of the first battery pack Bank1; then flows from the negative electrode of the first battery pack Bank1 into the positive electrode of the second battery pack Bank2, and then flows out from the negative electrode of the second battery pack Bank2, and returns to the neutral line through the second group of switch tubes (at least one of the switch tubes Q4~Q5), thereby completing the release of electricity from the first battery pack Bank1 to the second battery pack Bank2.

[0071] For example, see Figure 5 As shown, in the scenario where the second battery pack Bank2 releases electricity to the first battery pack Bank1, the electricity released by the second battery pack Bank2 is input into the energy storage module through the neutral line, and the energy storage module then transmits the electricity released by the second battery pack Bank2 to the positive electrode of the first battery pack Bank1 through the first group of switch tubes (at least one switch tube among the switch tubes Q1~Q3), and then flows out from the negative electrode of the first battery pack Bank1; the electricity flowing out from the negative electrode of the first battery pack Bank1 is transmitted to the second group of switch tubes (at least one of the switch tubes Q4~Q5) through the neutral line; the second group of switch tubes then transmits the electricity to the negative electrode of the second battery pack Bank2, thereby completing the release of electricity from the second battery pack Bank2 to the first battery pack Bank1.

[0072] See also Figure 7 and Fig. 9As shown, in a single alternating discharge cycle, the first battery pack releases power to the second battery pack in the first half of the cycle, and the second battery pack releases power to the first battery pack in the second half of the cycle. In a single alternating discharge cycle, the discharge duration of the first battery pack releasing power to the second battery pack is also the charging duration of the second battery pack receiving power released by the first battery pack; the charging duration of the first battery pack receiving power released by the second battery pack is also the discharge duration of the second battery pack releasing power to the first battery pack.

[0073] See also Fig. 9 As shown in FIG. 1 , for the charge and discharge curve of the first battery pack in a single alternating discharge cycle, the first half of the cycle is a discharge cycle in which the first battery pack releases power to the second battery pack, and the second half of the cycle is a charging cycle in which the first battery pack receives power released by the second battery pack. The charge and discharge curve of the first battery pack presents a sinusoidal waveform, thereby achieving oscillating heating of the first battery pack; please refer to FIG. Fig. 9 As shown, for the charge and discharge curve of the second battery pack in a single alternating discharge cycle, the first half of the cycle is a charging cycle in which the second battery pack receives the electricity released by the first battery pack, and the second half of the cycle is a discharge cycle in which the second battery pack releases electricity to the first battery pack. The charge and discharge curve of the second battery pack also presents a sinusoidal waveform, thereby realizing oscillating heating of the second battery pack.

[0074] certainly, Figures 7 to 9 The sine wave shown is an example, and the charge and discharge curves of the first battery pack and the second battery pack may also be triangular waves, rectangular waves, etc., which are not limited in the present disclosure.

[0075] Optionally, during the process of alternating discharge of the first battery pack and the second battery pack, it is determined that the first battery pack and the second battery pack are undergoing oscillation heating, and the remaining charge (SOC) of the first battery pack and the remaining charge of the second battery pack can be obtained, thereby determining whether there is a charge imbalance between the first battery pack and the second battery pack based on the relationship between the remaining charge of the first battery pack and the remaining charge of the second battery pack.

[0076] In step S12, in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, the power released by the first battery pack to the second battery pack is controlled to be greater than the power released by the second battery pack to the first battery pack, and the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is controlled to be equal.

[0077] When the remaining power of the first battery pack is greater than that of the second battery pack, the power released by the first battery pack to the second battery pack can be controlled to be greater than the power released by the second battery pack to the first battery pack. In this way, the first battery pack releases more power to the second battery pack and the second battery pack releases less power to the first battery pack, so that the remaining power of the first battery pack and the second battery pack can reach a balance more quickly.

[0078] For example, see Figure 6 As shown, in the scenario of oscillation heating, assuming that in the initial oscillation heating stage, the remaining power of the first battery pack and the second battery pack is 200V, at this time the remaining power of the first battery pack and the second battery pack is balanced, the power released by the first battery pack to the second battery pack is equal to the power released by the second battery pack to the first battery pack, for example, 50V of power is released to each other to complete the oscillation heating; due to the different working conditions of the first battery pack and the second battery pack, the remaining power of the first battery pack may be 200V and the remaining power of the second battery pack may be 150V. At this time, the remaining power of the first battery pack and the second battery pack is unbalanced, then The amount of electricity released by the first battery pack to the second battery pack is controlled to increase from 50V to 60V, and the amount of electricity released by the second battery pack to the first battery pack is controlled to decrease from 50V to 40V. In this way, after a single alternating discharge cycle, the remaining electricity of the first battery pack will decrease from 200V to 180V, and the remaining electricity of the second battery pack will increase from 150V to 170V, so that the difference between the remaining electricity of the first battery pack and the remaining electricity of the second battery pack will gradually become smaller. The electricity released by the first battery pack and the second battery pack is repeatedly adjusted through multiple alternating discharge cycles, so that the remaining electricity of the first battery pack and the second battery pack is finally balanced.

[0079] Optionally, in response to the remaining power of the second battery pack being greater than the remaining power of the first battery pack, the power released from the second battery pack to the first battery pack is controlled to be greater than the power released from the first battery pack to the second battery pack.

[0080] One form of controlling the discharge sums of the first battery pack and the second battery pack in each alternating discharge cycle to be equal is that the effective current (RMS) in each alternating discharge cycle is equal, and another form of controlling the discharge sums of the first battery pack and the second battery pack in each alternating discharge cycle to be equal is that the sum of the areas between the charge and discharge curve and the horizontal axis in each alternating discharge cycle is equal.

[0081] Regardless of which form of expression it is, it means that the heat of the first battery pack in each alternating discharge cycle is equal to the heat of the second battery pack in each alternating discharge cycle, including: the heat of the first battery pack in each alternating discharge cycle is equal, the heat of the second battery pack in each alternating discharge cycle is equal, and the heat of the first battery pack and the second battery pack in each alternating discharge cycle is balanced.

[0082] See also Figure 7 In the first alternating discharge cycle of the two alternating discharge cycles shown, the first battery pack is discharged in the first half of the cycle, and the second battery pack is discharged in the second half of the cycle. The amount of electricity released by the first battery pack and the second battery pack in the first alternating discharge cycle is equal.

[0083] When it is determined that the power of the first battery pack and the second battery pack is unbalanced, after the first alternating discharge cycle ends and before the second alternating discharge cycle, refer to Figure 7 The diagram above shows that the amount of electricity released by the first battery pack increases, while the amount of electricity released by the second battery pack remains unchanged. The amount of electricity released by the first battery pack can be controlled to be greater than that released by the second battery pack. If only the amount of electricity released by the first battery pack to the second battery pack is controlled to increase, while the amount of electricity released by the second battery pack to the first battery pack remains unchanged, although the amount of electricity released by the first battery pack can be greater than that released by the second battery pack, the problem of unbalanced remaining electricity between the first battery pack and the second battery pack can be solved, but the heat of the first battery pack in the second alternating discharge cycle will be higher than that in the first alternating discharge cycle. In this way, the unbalanced heat of the first battery pack in the two alternating discharge cycles will cause the charging and discharging performance of the first battery pack to decrease, and the service life of the first battery pack will also be reduced. Figure 7 It can be seen from the above figure that the area between the first half cycle of the charge and discharge curve of the second alternating discharge cycle and the horizontal axis (the horizontal axis is the axis with time as the horizontal axis) is significantly larger than the area between the first half cycle of the charge and discharge curve of the first alternating discharge cycle and the horizontal axis, which also means that the total charge and discharge heat of the first battery pack in the second alternating discharge cycle is greater than the total charge and discharge heat of the first battery pack in the first alternating discharge cycle.

[0084] Based on this, the embodiment of the present disclosure can control the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal, so that the heat of the first battery pack in each alternating discharge cycle is equal, and similarly, the heat of the second battery pack in each alternating discharge cycle is equal.

[0085] See also Figure 7The figure below shows a schematic diagram of the increase in the amount of electricity released by the first battery pack and the decrease in the amount of electricity released by the second battery pack. When it is determined that the amount of electricity released by the first battery pack and the second battery pack is unbalanced, the amount of electricity released by the first battery pack to the second battery pack can be controlled to increase, while the amount of electricity released by the second battery pack to the first battery pack can be controlled to decrease, so that the amount of electricity released by the first battery pack is greater than the amount of electricity released by the second battery pack. In addition, since the amount of electricity released by the first battery pack to the second battery pack increases, while the amount of electricity released by the second battery pack to the first battery pack correspondingly decreases, the total discharge of the first battery pack and the second battery pack remains unchanged, and the total discharge of the first battery pack and the second battery pack in the second alternating discharge cycle can be equal to the total discharge of the first battery pack and the second battery pack in the first alternating discharge cycle.

[0086] See also Figure 8 As shown, assuming that the amount of electricity released by the first battery pack to the second battery pack in the first alternating discharge cycle is 50V, and the amount of electricity released by the second battery pack to the first battery pack in the first alternating discharge cycle is also 50V, then the total discharge amount of the first battery pack and the second battery pack in the first alternating discharge cycle is 100V; in the second alternating discharge cycle, after the amount of electricity released by the first battery pack to the second battery pack is controlled to increase to 70V, the amount of electricity released by the second battery pack to the first battery pack will be correspondingly reduced to 30V, and the total discharge amount of the first battery pack and the second battery pack in the second alternating discharge cycle is also 100V, and the total discharge amount in the two alternating discharge cycles is consistent.

[0087] The following explains why the total discharge amounts of the first battery pack and the second battery pack in different alternating discharge cycles are equal, so that the heat amounts of the first battery pack in different alternating discharge cycles and the heat amounts of the second battery pack in different alternating discharge cycles are equal.

[0088] Using the same example as above, see Fig. 9 As shown, Fig. 9 The graph above the horizontal axis is the charge and discharge curve of the first battery pack in two alternating discharge cycles, and the graph below the horizontal axis is the charge and discharge curve of the second battery pack in two alternating discharge cycles. In the first alternating discharge cycle, the amount of electricity released by the first battery pack to the second battery pack is 50V, and the amount of electricity released by the second battery pack to the first battery pack in the first alternating discharge cycle is also 50V. In this case, the first battery pack will generate heat for releasing 50V electricity and heat for charging 50V electricity in the first alternating discharge cycle; in the second alternating discharge cycle, the amount of electricity released by the first battery pack to the second battery pack increases to 70V, and the amount of electricity released by the second battery pack to the first battery pack decreases to 30V. In this case, the first battery pack will generate heat for releasing 70V electricity and heat for charging 30V electricity in the second alternating discharge cycle.

[0089] The amount of electricity is expressed by current, and the relationship between current and heat is as follows: , where Q is heat, I is the current charged or released, and R is the internal resistance of the battery pack. It can be seen that current and heat can be treated as equivalent, so the sum of the heat generated by the first battery pack releasing 50V of electricity and charging 50V of electricity in the first alternating discharge cycle is equal to the sum of the heat generated by the first battery pack releasing 70V of electricity and charging 30V of electricity in the second alternating discharge cycle. Similarly, the heat of the second battery pack in different alternating discharge cycles can also be made the same.

[0090] It can be seen that since the heat generated by the second battery pack releasing electricity is equal to the heat generated by the first battery pack receiving the same amount of electricity, and the heat generated by the first battery pack releasing electricity is equal to the heat generated by the second battery pack receiving the same amount of electricity, controlling the total discharge of the first battery pack and the second battery pack in different alternating discharge cycles to be equal can make the heat of the first battery pack in different alternating discharge cycles equal, and can also make the heat of the second battery pack in different alternating discharge cycles equal.

[0091] At present, in the process of controlling the dual battery packs to perform alternating discharge, there will be an imbalance in the power of the dual battery packs; for any battery pack in the dual battery pack, the heat of the battery pack will also change frequently during the alternating discharge process.

[0092] For example, taking a dual battery pack including a first battery pack and a second battery pack as an example, during the alternating discharge of the first battery pack and the second battery pack, there will be an imbalance in the power between the first battery pack and the second battery pack. The remaining power of the first battery pack may be greater than the remaining power of the second battery pack, and the remaining power of the second battery pack may also be greater than the remaining power of the second battery pack.

[0093] Assuming that the remaining power of the first battery pack is greater than the remaining power of the second battery pack, in order to solve the problem of power imbalance between the two, the power released by the first battery pack to the load can be controlled to be greater than the power released by the second battery pack to the load. In this way, the remaining power of the first battery pack is reduced to gradually approach the remaining power of the second battery pack, thereby solving the problem of power imbalance between the first battery pack and the second battery pack.

[0094] But this will lead to two other problems:

[0095] First, when the amount of electricity released by the first battery pack to the load is controlled to be greater than the amount of electricity released by the second battery pack to the load, since parameters such as the amount of electricity or current flowing through the battery pack are positively correlated with the heat generated by the battery pack, when the amount of electricity released by the first battery pack is greater than the amount of electricity released by the second battery pack, the heat of the first battery pack is also greater than the heat of the second battery pack. At this time, there will be a heat imbalance between the first battery pack and the second battery pack.

[0096] Second, there are three stages in the process of balancing the power of the first battery pack and the second battery pack:

[0097] (1) When the power levels of the first battery pack and the second battery pack are balanced, the heat of the first battery pack is relatively low.

[0098] (2) When the remaining power of the first battery pack is greater than the remaining power of the second battery pack and the power between the first battery pack and the second battery pack is unbalanced, the power released by the first battery pack to the load will be controlled to be greater than the power released by the second battery pack to the load. At this time, the heat of the first battery pack is increased compared to the heat in stage (1).

[0099] (3) After controlling the amount of power released by the first battery pack to be greater than the amount of power released by the second battery pack to the load, when the remaining power of the first battery pack is close to the remaining power of the second battery pack, power balance is achieved between the first battery pack and the second battery pack. At this time, there is no need to continue controlling the amount of power released by the first battery pack to be greater than the amount of power released by the second battery pack to achieve power balance. The amount of power released by the first battery pack to the load will be restored to be equal to the amount of power released by the second battery pack to the load. At this time, the heat of the first battery pack is reduced.

[0100] It can be seen that in a single charge balancing cycle between the first battery pack and the second battery pack, the heat of the first battery pack will go through a stage of increasing and then decreasing, and there will be multiple cases of charge imbalance during the operation of the vehicle. Such repeated charge balancing will cause the heat of the first battery pack to change repeatedly in multiple charge balancing cycles, thereby causing the charging and discharging performance of the first battery pack to decrease and its service life to be shortened.

[0101] Similarly, the heat of the second battery pack will also change frequently during the power balancing process, resulting in a decrease in the charge and discharge performance of the second battery pack and a shortened service life.

[0102] Through the above technical solution, on the first aspect, because when the remaining power of the first battery pack is greater than the remaining power of the second battery pack, the power released by the first battery pack to the second battery pack will be controlled to be greater than the power released by the second battery pack to the first battery pack, the remaining power of the first battery pack will gradually decrease, and the remaining power of the second battery pack will gradually increase, so that the remaining power of the first battery pack and the second battery pack tend to be balanced, thereby achieving rapid power balance between the first battery pack and the second battery pack.

[0103] Secondly, in the scenario where the first battery pack and the second battery pack are alternately discharged, when the first battery pack releases power to the second battery pack, the second battery pack will also receive the same amount of power, and there is a positive correlation between power and heat, so the heat generated by the first battery pack releasing power will also be equal to the heat generated by the second battery pack receiving the same amount of power, and there is no heat imbalance between the first battery pack and the second battery pack. For example, please refer to Fig. 9 As shown, in a scenario where the first battery pack and the second battery pack are alternately discharged for oscillation heating, during a certain alternating discharge cycle, while the first battery pack releases power to the second battery pack, the second battery pack also correspondingly receives power released by the first battery pack, and the heat generated by the two is equal in any period.

[0104] Thirdly, the heat generated by the electricity released by the second battery pack to the first battery pack in each alternating discharge cycle is equal to the heat generated by the first battery pack charging the electricity. Therefore, the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is controlled to be equal, which also controls the total heat generated by the discharge of the first battery pack and the heat generated by charging in each alternating discharge cycle to be equal. Of course, the total heat generated by the discharge of the second battery pack and the heat generated by charging in each alternating discharge cycle is also controlled to be equal, thereby avoiding the problems of reduced charging and discharging performance and reduced service life caused by heat changes between the first battery pack and the second battery pack during a long period of charging and discharging.

[0105] The following describes an exemplary embodiment involved in the above step S12, which is used to explain an exemplary solution for controlling the discharge sums of the first battery pack and the second battery pack to be equal, including:

[0106] The first peak current in a first discharge process of controlling the first battery pack to release power to the second battery pack increases at a first target value, and the second peak current in a second discharge process of controlling the second battery pack to release power to the first battery pack decreases at a second target value.

[0107] The first peak current is the maximum discharge current during the process of the first battery pack releasing electricity in a single alternating discharge cycle; the second peak current is the maximum discharge current during the process of the second battery pack releasing electricity in a single alternating discharge cycle, and the first peak current is equal to the second peak current.

[0108] Among them, the third peak current obtained after the first peak current increases by the first target value is greater than the fourth peak current obtained after the second peak current decreases by the second target value, so that the amount of electricity released by the first battery pack to the second battery pack is greater than the amount of electricity released by the second battery pack to the first battery pack.

[0109] Optionally, the first target value is equal to the second target value.

[0110] See also Fig.10 As shown, assuming that the first target value and the second target value are 10, the first peak current is 20A, and the second peak current is also 20A, the first target value will be superimposed on the first peak current, and the third peak current after rising is 30A. The second target value will be subtracted from the second peak current, and the fourth peak current after falling is 10A.

[0111] Also, see Fig.11 As shown, when the first target value of the first peak current rise and the second target value of the second peak current fall in a single alternating discharge cycle are equal, the peak current in the first discharge process of the first battery pack is the sum of the areas A2+B2 between the discharge curve under the third peak current and the horizontal axis and the peak current in the second discharge process of the second battery pack is the sum of the areas B2 and the horizontal axis, and the peak current in the first discharge process of the first battery pack is the sum of the areas A1+B1 between the discharge curve under the first peak current and the horizontal axis and the peak current in the second discharge process of the second battery pack is the sum of the areas B1 and the horizontal axis. The discharge curve of the first battery pack is also the curve of the first half of the discharge cycle in the charge and discharge curve in a single alternating discharge cycle, and the discharge curve of the first battery pack is also the charge change curve generated by the first discharge process of the first battery pack; the discharge curve of the second battery pack is the curve of the second half of the discharge cycle in the charge and discharge curve in a single alternating discharge cycle, and the discharge curve of the second battery pack is also the charge change curve generated by the second discharge process of the second battery pack.

[0112] Optionally, a first current effective value can be obtained according to the first peak current and a preset value, and a second current effective value can be obtained according to the second peak current and a preset value; and then the sum of the first current effective value and the second current effective value in each alternating discharge cycle is controlled to be equal, so that the heat generated by the first battery pack in each alternating discharge cycle is equal, and the heat generated by the second battery pack in each alternating discharge cycle is also the same.

[0113] The preset value can be , the product of the first peak current and the preset value can be used as the first current effective value, and the product of the second peak current and the preset value can be used as the second current effective value.

[0114] By controlling the sum of the first peak current and the second peak current in each alternating discharge cycle to be equal, the sum of the first current effective value and the second current effective value in each alternating discharge cycle can be made equal, and the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle can also be made equal.

[0115]

[0116] Table 1

[0117] As shown in Table 1, after the first peak current of the first battery pack increases from 100 to 110, the first current effective value of the first battery pack in the alternating discharge cycle increases from 70 to 77; after the second peak current of the second battery pack decreases from 100 to 90, the second current effective value of the second battery pack in the alternating discharge cycle decreases from 70 to 63, but the sum of the first current effective value and the second current effective value before the peak current adjustment 140 and the sum of the first current effective value and the second current effective value 140 after the peak current adjustment remain unchanged, which means that the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is equal.

[0118] The effective value of current is an indicator for measuring the thermal effect of a battery pack. For example, the more electricity the first battery pack releases or charges, the larger the effective value of the first current, and the more heat the first battery pack generates; the more electricity the second battery pack releases or charges, the larger the effective value of the second current, and the more heat the second battery pack generates. Therefore, after ensuring that the sum of the effective values ​​of the current in each alternating discharge cycle remains unchanged, the total heat in each alternating discharge cycle can be kept unchanged.

[0119] Through the above technical scheme, the first target value of the first peak current rise during the first discharge process of the first battery pack releasing electricity to the second battery pack can be controlled to be the same as the second target value of the second peak current drop during the second discharge process of the second battery pack releasing electricity to the first battery pack. In this way, the sum of the peak currents between the peak current of the first battery pack in the first discharge process and the peak current of the second battery pack in the second discharge process in each alternating discharge cycle can be kept unchanged, thereby making the sum of the effective values ​​of the currents in each alternating discharge cycle unchanged, so that the discharge sums of the first battery pack and the second battery pack can be kept equal in each alternating discharge cycle, thereby making the heat of the first battery pack balanced in each alternating discharge cycle, and the heat of the second battery pack balanced in each alternating discharge cycle.

[0120] Furthermore, by making the first target value of the increase in power released by the first battery pack equal to the second target value of the decrease in power released by the second battery pack, it is possible to achieve balance of remaining power between the first battery pack and the second battery pack while also ensuring long-term thermal balance of the first battery pack and long-term thermal balance of the second battery pack.

[0121] The following introduces an exemplary solution for obtaining a non-peak current near the third peak current and the fourth peak current after increasing the first peak current to the third peak current and decreasing the second peak current to the fourth peak current. The solution includes the following two scenarios.

[0122] In the first scenario, for the non-peak current near the third peak current, the first peak current in the first discharge process can be controlled to increase to the first target value to obtain the third peak current.

[0123] (1) For a first non-peak current adjacent to the third peak current in the first discharge process, controlling the third peak current to decrease by a first decrease amplitude to obtain the first non-peak current.

[0124] Among them, the first decrease amplitude is smaller than the preset value.

[0125] For example, a first decrease amplitude that is smaller than a preset value may be subtracted from the third peak current to obtain a first non-peak current adjacent to the third peak current.

[0126] For example, if the preset value is 10, the first decrease amplitude smaller than 10 may be subtracted from the third peak current to obtain the first non-peak current.

[0127] (2) For a second non-peak current that is not adjacent to the third peak current in the first discharge process, controlling a previous non-peak current of the second non-peak current to decrease by a second decrease amplitude to obtain the second non-peak current.

[0128] The second decrease amplitude is smaller than a preset value.

[0129] For example, the second non-peak current may be obtained by subtracting a second decrease amplitude that is smaller than a preset value from a previous non-peak current of the second non-peak current.

[0130] For example, if the preset value is 10, the first non-peak current can be obtained by subtracting a first decrease amplitude smaller than 10 from the previous non-peak current of the second non-peak current.

[0131] Through the first scenario, after obtaining the third peak current, the first decrease amplitude or the second decrease amplitude that is less than the preset value can be gradually reduced on the basis of the third peak current, so as to obtain a smooth discharge curve under the third peak current when the peak current of the first battery pack in the first discharge process is the peak current, and then the discharge curve of the first battery pack under the first peak current is controlled to be raised to the discharge curve under the third peak current. Please refer to Fig.10 As shown, the discharge curve of the first battery pack in the first half of a single alternating discharge cycle can be improved from a discharge curve at a first peak current to a discharge curve at a third peak current, thereby increasing the amount of electricity released by the first battery pack to the second battery pack as a whole in the first half of the cycle.

[0132] In the second scenario, for the non-peak current near the fourth peak current, the second peak current in the second discharge process can be controlled to decrease to the second target value to obtain the fourth peak current.

[0133] (1) For a third non-peak current adjacent to the fourth peak current in the second discharge process, controlling the third peak current to increase with a first increase amplitude to obtain the third non-peak current.

[0134] Among them, the first rising amplitude is smaller than a preset value.

[0135] For example, a first rising amplitude smaller than a preset value may be added to the fourth peak current, thereby obtaining a third non-peak current adjacent to the fourth peak current.

[0136] (2) For a fourth non-peak current that is not adjacent to the fourth peak current in the second discharge process, controlling a previous non-peak current of the fourth non-peak current to increase by a second increasing amplitude to obtain the fourth non-peak current.

[0137] The second rising amplitude is smaller than a preset value, and the second rising amplitude may be equal to or different from the first rising amplitude.

[0138] For example, a second rising amplitude smaller than a preset value may be added to a previous non-peak current of the fourth non-peak current, thereby obtaining a fourth non-peak current adjacent to the fourth peak current step.

[0139] Through the second scenario, after obtaining the fourth peak current, the first rising amplitude or the second rising amplitude that is less than the preset value can be gradually increased on the basis of the fourth peak current, so as to obtain a smooth discharge curve under the fourth peak current when the peak current of the second battery pack in the second discharge process is obtained, and then the discharge curve of the second battery pack under the second peak current is controlled to decrease to the discharge curve under the fourth peak current. Fig.10 As shown, the discharge curve of the second battery pack in the second half of a single alternating discharge cycle can be reduced from a discharge curve at the second peak current to a discharge curve at the fourth peak current, thereby reducing the amount of electricity released by the second battery pack to the first battery pack as a whole in the second half of the cycle.

[0140] Optionally, after obtaining the charge and discharge curve in which the peak current in a single alternating discharge cycle is the second peak current and the fourth peak current, the amplitude of the carrier frequency signal loaded on the charge and discharge curve can be adjusted to adjust the duty cycle of the switching tube, and ultimately the current at each moment in a single alternating discharge cycle is executed according to the current on the first charge and discharge curve.

[0141] See also Fig.12 As shown, Fig.12 From top to bottom, the rectangular wave curves of the duty cycle of the second group of switch tubes, the rectangular wave curves of the duty cycle of the first group of switch tubes, and Fig.12 The bottom of the figure shows the charge and discharge curves of the first battery pack and the second battery pack, which are sinusoidal wave curves, and the carrier frequency signal loaded on the charge and discharge curves, which is a triangular wave.

[0142] See also Fig.12 As shown at the bottom, it includes a charge and discharge curve when the peak current in a single alternating discharge cycle is the second peak current and the fourth peak current, the charge and discharge curve is a sine curve, and also includes a carrier frequency signal, which is a triangular wave curve.

[0143] See also Fig.12 As shown, Fig.12 The middle curve in FIG. 1 shows the rectangular wave curve of the duty cycle of the first group of switch tubes. Fig.12 The upper curve in FIG. 1 shows the duty cycle curve of the second group of switch tubes.

[0144] Combination Fig.12 It can be seen that the duty cycle of the first group of switch tubes is controlled by Fig.12 According to the rectangular wave curve shown in the middle part, when the duty cycle of the first group of switching tubes increases, the amount of electricity released by the first battery pack to the second battery pack gradually increases. Conversely, when the duty cycle of the first group of switching tubes gradually decreases, the amount of electricity released by the first battery pack to the second battery pack gradually decreases.

[0145] Similarly, the duty cycle of the second set of switches can be controlled to Fig.12 According to the rectangular wave curve shown in the uppermost part of the diagram, when the duty cycle of the second group of switching tubes increases, the amount of electricity released by the second battery pack to the first battery pack gradually increases. Conversely, when the duty cycle of the second group of switching tubes gradually decreases, the amount of electricity released by the second battery pack to the first battery pack gradually decreases.

[0146] It is also possible to control the duty cycle of the first group of switches when adjusting the first peak current of the first battery pack to be greater than the duty cycle of the second group of switches when adjusting the second peak current of the second battery pack. In this way, the first peak current is increased to the third peak current, the second peak current is reduced to the fourth peak current, and the third peak current is greater than the fourth peak current.

[0147] Also, see Fig.12 As shown, if the peak value of the carrier frequency signal at the same moment is greater than the current value of the charge and discharge curve, the corresponding duty cycle of the first group of switch tubes is small, and the duty cycle of the second group of switch tubes is large; conversely, if the trough value of the carrier frequency signal at the same moment is less than the current value of the charge and discharge curve, the corresponding duty cycle of the first group of switch tubes is large, and the duty cycle of the second group of switch tubes is small. In this way, by adjusting the amplitude of the carrier frequency signal, the duty cycle of the first group of switch tubes and the second group of switch tubes can be adjusted.

[0148] An exemplary embodiment of the present disclosure is described below. The exemplary embodiment is used to explain the first target value used when the first peak current rises, and includes the following steps:

[0149] (1) Obtaining a power difference between a remaining power of the first battery pack and a remaining power of the second battery pack.

[0150] The remaining power of the first battery pack and the second battery pack may be collected respectively by a battery management module (BMS) or multiple battery management modules, and the power difference between the remaining power of the first battery pack and the remaining power of the second battery pack may be calculated.

[0151] (2) Determine a first target value corresponding to the power difference according to a mapping relationship between the power difference and the first target value.

[0152] Different first target values ​​corresponding to different power differences can be pre-calculated through experiments, so as to establish a mapping relationship between different power differences and different first target values. For example, the larger the power difference, the larger the first target value.

[0153] After the mapping relationships between different power differences and different first target values ​​are established, the first target value corresponding to the power difference can be determined according to the mapping relationship between the power difference and the first target value.

[0154] Optionally, since the first target value is equal to the second target value, after the first target value is obtained, the second target value is also regarded as obtained.

[0155] Through the above technical solution, when the power difference between the remaining power of the first battery pack and the second battery pack is different, different first target values ​​can be used to increase the first peak current, so that the remaining power of the first battery pack and the second battery pack can be balanced more quickly. For example, when the power difference between the remaining power of the first battery pack and the remaining power of the second battery pack is larger, a larger first target value will be superimposed on the first peak current to obtain a larger third peak current, then the first battery pack will release more power to the second battery pack, and the larger second target value will be subtracted from the second peak current to obtain a smaller fourth peak current, then the second battery pack will release less power to the first battery pack, so that the remaining power of the first battery pack and the second battery pack will be balanced more quickly.

[0156] The following is an exemplary embodiment of the present disclosure, which is used to explain the prerequisites for power balancing and heat balancing, and includes at least one of the following:

[0157] The electric quantity of the first battery pack and the second battery pack are unbalanced, and the heat quantity of the first battery pack and the second battery pack are unbalanced.

[0158] In the case where the power levels of the first battery pack and the second battery pack are unbalanced, and the heat levels of the first battery pack and the second battery pack are unbalanced, the power released by the first battery pack to the second battery pack is controlled to be greater than the power released by the second battery pack to the first battery pack, and the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is controlled to be equal, thereby achieving power balance and heat balance.

[0159] See also Fig.13As shown, when the power of the first battery pack is unbalanced and the heat of the first battery pack and the second battery pack is balanced, if the power of the first battery pack is greater than that of the second battery pack, the excess power of the first battery pack over that of the second battery pack can be controlled to be consumed through the power conversion module; conversely, if the power of the second battery pack is greater than that of the first battery pack, the excess power of the second battery pack over that of the first battery pack can be controlled to be consumed through the power conversion module.

[0160] When the charge levels of the first battery pack and the second battery pack are balanced but the heat levels of the first battery pack and the second battery pack are unbalanced, the first battery pack and the second battery pack can be controlled to charge each other alternately, thereby achieving oscillating heating while ensuring heat balance between the first battery pack and the second battery pack.

[0161] Fig.14 is a block diagram of a circuit control device according to an exemplary embodiment. Fig.14 The circuit control device 1400 includes: an acquisition module 1410 and a response module 1420 .

[0162] The acquisition module 1410 is configured to acquire the remaining power of the first battery pack and the remaining power of the second battery pack during the process of the first battery pack and the second battery pack being alternately discharged; wherein the first battery pack and the second battery pack are charged with each other in each alternate discharge cycle;

[0163] The response module 1420 is configured to control the amount of power released by the first battery pack to the second battery pack to be greater than the amount of power released by the second battery pack to the first battery pack in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, and to control the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal.

[0164] Optionally, the response module 1420 is further configured to control a first peak current in a first discharge process in which the first battery pack releases electricity to the second battery pack to increase by a first target value, and control a second peak current in a second discharge process in which the second battery pack releases electricity to the first battery pack to decrease by a second target value;

[0165] After the first peak current increases with the first target value and the second peak current decreases with the second target value, the amount of electricity released by the first battery pack to the second battery pack is greater than the amount of electricity released by the second battery pack to the first battery pack.

[0166] Optionally, when the first target value is equal to the second target value, the discharge sums of the first battery pack and the second battery pack in each alternating discharge cycle are equal.

[0167] Optionally, the circuit control device 1400 includes:

[0168] A third peak current calculation module is configured to control the first peak current in the first discharge process to increase to the first target value to obtain a third peak current;

[0169] A first control module is configured to control the third peak current to decrease by a first decrease amplitude with respect to a first non-peak current adjacent to the third peak current in the first discharge process, so as to obtain the first non-peak current;

[0170] The second control module is configured to control a previous non-peak current of a second non-peak current which is not adjacent to the third peak current in the first discharge process to decrease by a second decrease amplitude to obtain the second non-peak current; wherein the first decrease amplitude and the second decrease amplitude are less than a preset value.

[0171] Optionally, the response module 1420 is also configured to, in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack and the heat of the first battery pack being different from the heat of the second battery pack, control the power released by the first battery pack to the second battery pack to be greater than the power released by the second battery pack to the first battery pack, and control the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal.

[0172] Optionally, when the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle are equal, the heat of the first battery pack in each alternating discharge cycle is equal to the heat of the second battery pack in each alternating discharge cycle.

[0173] Optionally, the circuit control device 1400 includes:

[0174] The third control module is configured to control the first battery pack to release electricity to the energy storage module in each alternating discharge cycle, and after the energy storage module releases the electricity released by the first battery pack to the second battery pack, control the second battery pack to release electricity to the energy storage module, and the energy storage module releases the electricity released by the second battery pack to the first battery pack.

[0175] Optionally, the circuit control device 1400 includes:

[0176] a power acquisition module, configured to acquire a power difference between a remaining power of the first battery pack and a remaining power of the second battery pack;

[0177] The search module is configured to determine a first target value corresponding to the power difference according to a mapping relationship between the power difference and the first target value.

[0178] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0179] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, and the program instructions, when executed by a processor, implement the steps of the circuit control method provided by the present disclosure.

[0180] Fig.15 1 is a block diagram of a vehicle 1500 according to an exemplary embodiment. For example, the vehicle 1500 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 1500 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0181] Reference Fig.15 , the vehicle 1500 may include various subsystems, for example, an infotainment system 1510, a perception system 1520, a decision control system 1530, a drive system 1540, and a computing platform 1550. The vehicle 1500 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 1500 may be interconnected by wire or wireless means.

[0182] In some embodiments, the infotainment system 1510 may include a communication system, an entertainment system, and a navigation system, etc.

[0183] The perception system 1520 may include several sensors for sensing information about the environment around the vehicle 1500. For example, the perception system 1520 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0184] The decision control system 1530 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0185] The drive system 1540 may include components that provide powered motion for the vehicle 1500. In one embodiment, the drive system 1540 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0186] Some or all functions of the vehicle 1500 are controlled by a computing platform 1550. The computing platform 1550 may include at least one processor 1551 and a memory 1552, and the processor 1551 may execute instructions 1553 stored in the memory 1552.

[0187] The processor 1551 may be any conventional processor, such as a commercially available CPU. The processor may also include a graphics processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a system on chip (System on Chip, SOC), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) or a combination thereof.

[0188] Memory 1552 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0189] In addition to instructions 1553 , memory 1552 may also store data, such as road maps, route information, and data such as the location, direction, and speed of the vehicle. The data stored in memory 1552 may be used by computing platform 1550 .

[0190] In the embodiment of the present disclosure, the processor 1551 may execute the instruction 1553 to complete all or part of the steps of the above-mentioned circuit control method.

[0191] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by a processor 820 of the device 800 to perform the circuit control method described above. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0192] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above circuit control method when executed by the programmable device.

[0193] Some embodiments of the present disclosure also provide a chip system, such as Fig.16 As shown, the chip system includes at least one processor 1601 and at least one interface circuit 1602. The processor 1601 and the interface circuit 1602 can be interconnected through lines. For example, the interface circuit 1602 can be used to receive signals from other devices (such as the memory of an electronic device). For another example, the interface circuit 1602 can be used to send signals to other devices (such as the processor 1601). Exemplarily, the interface circuit 1602 can read the instructions stored in the memory and send the instructions to the processor 1601. When the instructions are executed by the processor 1601, the circuit control device can perform the various steps in the above embodiments. Of course, the chip system can also include other discrete devices, and some embodiments of the present disclosure are not specifically limited to this.

[0194] In some embodiments of the present disclosure, the interface circuit 1602 can obtain data, program instructions and / or information from the internal storage area of ​​the chip system; it can also obtain data, program instructions and / or information from outside the chip system.

[0195] Those skilled in the art may also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application may be implemented by electronic hardware, computer software, or a combination of the two. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions described for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present application.

[0196] Although terms such as "first", "second" and "third" may be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer or section from another component, component, region, layer or section. For example, the first battery pack and the second battery pack are to distinguish the two battery packs. The first battery pack can also be referred to as the second battery pack without being limited to these terms. Therefore, without departing from the teachings of each example, the first component, component, region, layer or section mentioned in the examples described herein may also be referred to as the second component, component, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description herein, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

Claims

1. A circuit control method, characterized in that: include: During the process of alternating discharge of the first battery pack and the second battery pack, obtaining the remaining power of the first battery pack and the remaining power of the second battery pack; wherein in each alternating discharge cycle, the first battery pack and the second battery pack release power to each other in turn; In response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, controlling the power released from the first battery pack to the second battery pack to be greater than the power released from the second battery pack to the first battery pack, and controlling the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal; The controlling the amount of electricity released by the first battery pack to the second battery pack to be greater than the amount of electricity released by the second battery pack to the first battery pack includes: A first peak current in a first discharge process in which the first battery pack releases power to the second battery pack increases at a first target value, and a second peak current in a second discharge process in which the second battery pack releases power to the first battery pack decreases at a second target value; the first target value is equal to the second target value.

2. The method according to claim 1, characterized in that After the first peak current increases with the first target value and the second peak current decreases with the second target value, the amount of electricity released by the first battery pack to the second battery pack is greater than the amount of electricity released by the second battery pack to the first battery pack.

3. The method according to claim 2, characterized in that When the first target value is equal to the second target value, the discharge sums of the first battery pack and the second battery pack in each alternating discharge cycle are equal.

4. The method according to claim 2, characterized in that: The method further comprises: After controlling the first peak current in the first discharge process to increase to the first target value, a third peak current is obtained; For a first non-peak current adjacent to the third peak current in the first discharge process, controlling the third peak current to decrease by a first decrease amplitude to obtain the first non-peak current; For a second non-peak current that is not adjacent to the third peak current in the first discharge process, a previous non-peak current of the second non-peak current is controlled to decrease by a second decrease amplitude to obtain the second non-peak current; wherein the first decrease amplitude and the second decrease amplitude are less than a preset value.

5. The method according to claim 1, characterized in that In response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, controlling the power released by the first battery pack to the second battery pack to be greater than the power released by the second battery pack to the first battery pack, and controlling the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal, comprising: In response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, and the heat of the first battery pack being different from the heat of the second battery pack, the power released by the first battery pack to the second battery pack is controlled to be greater than the power released by the second battery pack to the first battery pack, and the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle is controlled to be equal.

6. The method according to any one of claims 1 to 5, characterized in that: When the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle are equal, the heat of the first battery pack in each alternating discharge cycle is equal to the heat of the second battery pack in each alternating discharge cycle.

7. The method according to claim 1, characterized in that The method further comprises: In each alternating discharge cycle, the first battery pack is controlled to release electricity to the energy storage module. After the energy storage module releases the electricity released by the first battery pack to the second battery pack, the second battery pack is controlled to release electricity to the energy storage module. The energy storage module releases the electricity released by the second battery pack to the first battery pack.

8. The method according to claim 2, characterized in that: The method further comprises: Acquire a power difference between a remaining power of the first battery pack and a remaining power of the second battery pack; According to the mapping relationship between the power difference and the first target value, a first target value corresponding to the power difference is determined.

9. A circuit control device, characterized in that: include: an acquisition module, configured to acquire the remaining power of the first battery pack and the remaining power of the second battery pack during the process of the first battery pack and the second battery pack being alternately discharged; wherein the first battery pack and the second battery pack are charged with each other in each alternating discharge cycle; a response module, configured to, in response to the remaining power of the first battery pack being greater than the remaining power of the second battery pack, control the power released by the first battery pack to the second battery pack to be greater than the power released by the second battery pack to the first battery pack, and control the total discharge of the first battery pack and the second battery pack in each alternating discharge cycle to be equal; The response module is also configured to control a first peak current in a first discharge process in which the first battery pack releases power to the second battery pack to increase at a first target value, and to control a second peak current in a second discharge process in which the second battery pack releases power to the first battery pack to decrease at a second target value; the first target value is equal to the second target value.

10. A vehicle, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: Execute the steps of the method according to any one of claims 1 to 8.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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