Adaptive power supply equipment, electric vehicle and charging method

Abstract

The present application discloses an adaptive power supply device, an electric vehicle, and a charging method. The adaptive power supply device provided by the present application includes N battery packs connected in series, a charging channel switching module, and a charging port; N is an integer greater than 1; wherein the charging channel switching module has: N positive charging terminals connected one-to-one with the positive poles of the N battery packs, N negative charging terminals connected one-to-one with the negative poles of the N battery packs, a positive input terminal connected to the charging port, and a negative input terminal connected to the charging port; wherein the conduction between the positive input terminal of the charging channel switching module and each positive charging terminal is adjustable, and the conduction between the negative input terminal of the charging channel switching module and each negative charging terminal is adjustable. The adaptive power supply device of the present application realizes the function of charging each battery pack in the N battery packs separately, and can fully charge each battery pack in the N battery packs, thereby improving the charging effect of the adaptive power supply device.

Description

Technical Field

[0001] The present application relates to the field of charging, and in particular to an adaptive power supply device, an electric vehicle, and a charging method. Background Art

[0002] Currently, common power supply equipment in electric vehicles operates at around 400V (e.g., 350V / 400V / 500V). Accordingly, electrical loads within electric vehicles (such as PTC (Positive Temperature Coefficient) heaters, air conditioning compressors, and drive motors) are designed to operate at 400V. However, to reduce charging / discharging currents during high-power rapid charging / discharging, power supply equipment operating at around 800V (e.g., 800V / 900V / 1000V) is becoming a trend in electric vehicles. Related technologies employ a method of designing adaptive power supply equipment by connecting multiple battery packs in series and adding switching circuits. This allows the device to power both devices with standard voltages (e.g., 350V / 400V / 500V) and devices with standard voltages (e.g., 800V / 900V / 1000V), effectively reducing development cycles and costs.

[0003] In the related art, the charging method for adaptive power supply devices is generally based on the maximum rated voltage of the adaptive power supply device. For example, if the maximum rated voltage of the adaptive power supply device is 800V, the existing technology generally selects a charging voltage of 800V to charge the adaptive power supply device.

[0004] However, the related art suffers from poor charging performance of adaptive power supply devices. For example, when charging the adaptive power supply device at its highest rated voltage, the voltages of the multiple battery packs within the device may be inconsistent. As a result, charging is terminated after any one of the battery packs is fully charged, preventing each of the multiple battery packs from being fully charged, severely impacting the charging performance of the adaptive power supply device. Summary of the Invention

[0005] The purpose of this application is to provide an adaptive power supply device, an electric vehicle and a charging method to solve the problem of poor charging effect of the adaptive power supply device in the related art.

[0006] In a first aspect, the present application provides an adaptive power supply device for an electric vehicle, comprising:

[0007] N battery packs, charging channel switching modules, and charging ports connected in series; N is an integer greater than 1; where:

[0008] The charging channel switching module has N positive charging terminals, N negative charging terminals, a positive input terminal, and a negative input terminal; the N positive charging terminals of the charging channel switching module are connected one-to-one with the positive electrodes of the N battery packs, the N negative charging terminals of the charging channel switching module are connected one-to-one with the negative electrodes of the N battery packs, the positive input terminal of the charging channel switching module is connected to the charging port, and the negative input terminal of the charging channel switching module is connected to the charging port;

[0009] Among them, the conductivity between the positive input end of the charging channel switching module and each of the N positive charging ends of the charging channel switching module is adjustable, and the conductivity between the negative input end of the charging channel switching module and each of the N negative charging ends of the charging channel switching module is adjustable.

[0010] Optionally, in the adaptive power supply device provided in the embodiment of the present application, the adaptive power supply device further includes a control module, and the control module is connected to the charging channel switching module;

[0011] The control module is used to switch the charging port to be connected to the target battery pack by controlling the conductivity between the positive input end of the charging channel switching module and each of the N positive charging ends of the charging channel switching module, and controlling the conductivity between the negative input end of the charging channel switching module and each of the N negative charging ends of the charging channel switching module; when the charging port is connected to the target battery pack, the target battery pack is charged; wherein, the target battery pack includes at least one battery pack among the N battery packs.

[0012] Optionally, in the adaptive power supply device provided in the embodiment of the present application, the charging port includes at least one of a DC charging port and an AC charging port.

[0013] Optionally, in the adaptive power supply device provided in the embodiment of the present application, the charging channel switching module includes a first control switch and a second control switch;

[0014] The first control switch has an input end and N output ends, the input end of the first control switch is connected to the charging port, and the N output ends of the first control switch are connected to the positive electrodes of the N battery packs in a one-to-one correspondence;

[0015] The second control switch has an input end and N output ends. The input end of the second control switch is connected to the charging port, and the N output ends of the second control switch are connected to the negative electrodes of the N battery packs in a one-to-one correspondence.

[0016] Optionally, in the adaptive power supply device provided in the embodiment of the present application,

[0017] In the case where the adaptive power supply device includes a control module, the control module is connected to the first control switch and the second control switch respectively;

[0018] The control module is used to control the conduction between the input end of the first control switch and each of the N output ends, and to control the conduction between the input end of the second control switch and each of the N output ends.

[0019] Optionally, in the adaptive power supply device provided in the embodiment of the present application,

[0020] In the case where the charging port includes a DC charging port, the input end of the first control switch is connected to the DC charging port, and the input end of the second control switch is connected to the DC charging port;

[0021] and / or,

[0022] In the case where the charging port includes an AC charging port, the adaptive power supply device also includes a first vehicle-mounted charger, which is used to convert AC into DC; the input end of the first control switch is connected to the AC charging port through the first vehicle-mounted charger, and the input end of the second control switch is connected to the AC charging port through the first vehicle-mounted charger.

[0023] Optionally, in the adaptive power supply device provided in an embodiment of the present application, when the charging port includes an AC charging port, the charging channel switching module is a second on-board charger with multi-channel output;

[0024] The second on-board charger has N positive charging terminals, N negative charging terminals, a positive input terminal, and a negative input terminal;

[0025] The N positive charging terminals of the second on-board charger are connected to the positive electrodes of the N battery packs in a one-to-one correspondence, the N negative charging terminals of the second on-board charger are connected to the negative electrodes of the N battery packs in a one-to-one correspondence, the positive input terminal of the second on-board charger is connected to the AC charging port, and the negative input terminal of the second on-board charger is connected to the AC charging port;

[0026] Among them, the conductivity between the positive input terminal of the second vehicle charger and each of the N positive charging terminals of the second vehicle charger is adjustable, and the conductivity between the negative input terminal of the second vehicle charger and each of the N negative charging terminals of the second vehicle charger is adjustable.

[0027] Optionally, in the adaptive power supply device provided in an embodiment of the present application, when the charging port includes an AC charging port, the charging channel switching module includes N third on-board chargers with single-channel outputs;

[0028] The positive charging ends of the N third on-board chargers are connected one-to-one with the positive poles of the N battery packs, the negative charging ends of the N third on-board chargers are connected one-to-one with the negative poles of the N battery packs, the positive input ends of the N third on-board chargers are all connected to the AC charging port, and the negative input ends of the N third on-board chargers are all connected to the AC charging port.

[0029] Optionally, in the adaptive power supply device provided in the embodiment of the present application, the control module is integrated into the controller of the electric vehicle.

[0030] In a second aspect, the present application also provides an electric vehicle, comprising the adaptive power supply device described in the first aspect.

[0031] In a third aspect, the present application further provides a method for charging the adaptive power supply device described in the first aspect, comprising:

[0032] The charging port is switched to be connected to the target battery pack by controlling the conduction between the positive input terminal of the charging channel switching module and each of the N positive charging terminals of the charging channel switching module, and controlling the conduction between the negative input terminal of the charging channel switching module and each of the N negative charging terminals of the charging channel switching module;

[0033] When the charging port is connected to the target battery pack, the target battery pack is charged, wherein the target battery pack includes at least one battery pack among the N battery packs.

[0034] Optionally, in the charging method provided in the embodiment of the present application, the target battery pack includes any one of the N battery packs;

[0035] Switching the charging port to connect with the target battery pack includes:

[0036] By controlling the positive input terminal of the charging channel switching module to be connected to the i-th positive charging terminal of the charging channel switching module, and controlling the negative input terminal of the charging channel switching module to be connected to the i-th negative charging terminal of the charging channel switching module, the charging port is switched to be connected to the i-th battery pack among the N battery packs;

[0037] The step of charging the target battery pack when the charging port is connected to the target battery pack includes:

[0038] When the charging port is connected to the i-th battery pack, the i-th battery pack is charged; wherein i is a positive integer less than or equal to N.

[0039] Optionally, in the charging method provided in an embodiment of the present application, the target battery group is a target combined battery group, and the target combined battery group includes at least two battery groups among the N battery groups;

[0040] Switching the charging port to connect with the target battery pack includes:

[0041] The charging port is switched to connect to the target assembled battery pack by controlling the positive input terminal of the charging channel switching module to connect to the kth positive charging terminal of the charging channel switching module, and controlling the negative input terminal of the charging channel switching module to connect to the k+mth negative charging terminal of the charging channel switching module; wherein k is a positive integer less than N, and m is a positive integer;

[0042] The step of charging the target battery pack when the charging port is connected to the target battery pack includes:

[0043] When the charging port is connected to the target assembled battery pack, the target assembled battery pack is charged; wherein the target assembled battery pack includes the kth battery pack to the k+mth battery pack connected in series in N battery packs.

[0044] Optionally, in the charging method provided in the embodiment of the present application, charging the target battery pack when the charging port is connected to the target battery pack includes:

[0045] Determining a voltage type of a charging voltage at the charging port; the voltage type includes at least one of an alternating current voltage and a direct current voltage;

[0046] When the charging voltage at the charging port is a DC voltage, determining whether the charging voltage is less than a first threshold;

[0047] When the charging voltage at the charging port is an AC voltage, or when the charging voltage at the charging port is a DC voltage and the charging voltage is less than a first threshold, perform the following steps:

[0048] Determine a first target battery group from the N battery groups; the first target battery group is the battery group with the lowest remaining power among the N battery groups;

[0049] When the charging port is switched to connect to a first target battery group, the first target battery group is charged until the difference between the remaining power of the first target battery group and the remaining power of a second target battery group reaches a second threshold; the second target battery group is any battery group among the N battery groups except the first target battery group;

[0050] When the charging port is switched to connect to the second target battery group, the second target battery group is charged until the difference between the remaining power of the second target battery group and the remaining power of the third target battery group reaches a second threshold; the third target battery group is any battery group among the N battery groups except the second target battery group;

[0051] When the charging port is switched to be connected to the third target battery pack, charging the third target battery pack to increase the remaining power of the third target battery pack;

[0052] Based on the remaining power of each battery pack in the N battery packs, each battery pack is charged in turn until the remaining power of each battery pack reaches a third threshold.

[0053] Optionally, in the charging method provided in the embodiment of the present application, when the charging voltage is a DC voltage and the charging voltage is greater than or equal to a first threshold, the method further includes:

[0054] Determine a first target battery group and a fourth target battery group from the N battery groups; the first target battery group is the battery group with the lowest remaining power among the N battery groups; the fourth target battery group is the battery group with the highest remaining power among the N battery groups;

[0055] determining whether a difference between the remaining power of the first target battery pack and the fourth target battery pack is less than a second threshold;

[0056] When the difference between the remaining power of the first target battery group and the fourth target battery group is less than a second threshold, the following steps are performed:

[0057] When the charging port is switched to be connected to all the N battery packs, charging the N battery packs simultaneously until the remaining power of the fourth target battery pack reaches a third threshold;

[0058] When the charging port is switched to connect to a fifth target battery pack, charging the fifth target battery pack until the remaining power of each of the N battery packs reaches a third threshold; the fifth target battery pack is each of the N battery packs except the fourth target battery pack;

[0059] Alternatively, when the difference between the remaining power of the first target battery group and the fourth target battery group is greater than or equal to the second threshold, the following steps are performed:

[0060] When the charging port is switched to be connected to the fifth target battery pack, the fifth target battery pack is charged based on the remaining power of the fourth target battery pack until the remaining power of each battery pack in the N battery packs is equal;

[0061] When the charging port is switched to be connected to all the N battery packs, the N battery packs are charged simultaneously until the remaining power of each of the N battery packs reaches a third threshold.

[0062] In an embodiment of the present application, the adaptive power supply device includes N battery packs connected in series, a charging channel switching module and a charging port; N is an integer greater than 1; wherein: the charging channel switching module has N positive charging terminals, N negative charging terminals, a positive input terminal and a negative input terminal; the N positive charging terminals of the charging channel switching module are connected one-to-one with the positive poles of the N battery packs, the N negative charging terminals of the charging channel switching module are connected one-to-one with the negative poles of the N battery packs, the positive input terminal of the charging channel switching module is connected to the charging port, and the negative input terminal of the charging channel switching module is connected to the charging port; wherein, the conductivity between the positive input terminal of the charging channel switching module and each of the N positive charging terminals of the charging channel switching module is adjustable, and the conductivity between the negative input terminal of the charging channel switching module and each of the N negative charging terminals of the charging channel switching module is adjustable. In this way, in the charging scenario of the adaptive power supply device, since the conductivity between the positive input end of the charging channel switching module and each of the N positive charging ends of the charging channel switching module is adjustable, and the conductivity between the negative input end of the charging channel switching module and each of the N negative charging ends of the charging channel switching module is adjustable, multiple adjustable charging channels can be built between the charging port and each of the N battery packs to realize the function of charging each of the N battery packs separately, and then each battery pack in the N battery packs is avoided from being affected by different voltages between battery packs in the charging scenario, and each of the N battery packs can be fully charged, thereby improving the charging effect of the adaptive power supply device. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in this application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0064] Figure 1 A schematic diagram of the structure of an adaptive power supply device provided in an embodiment of the present application;

[0065] Figure 2 A schematic diagram of the structure of another adaptive power supply device provided in an embodiment of the present application;

[0066] Figure 3 A schematic diagram of the specific structure of another adaptive power supply device provided in an embodiment of the present application;

[0067] Figure 4 A schematic diagram of the specific structure of another adaptive power supply device provided in an embodiment of the present application;

[0068] Figure 5 A schematic diagram of the specific structure of another adaptive power supply device provided in an embodiment of the present application;

[0069] Figure 6 A schematic diagram of the specific structure of another adaptive power supply device provided in an embodiment of the present application;

[0070] Figure 7 A flowchart of a method for charging an adaptive power supply device provided in an embodiment of the present application;

[0071] Figure 8 A flowchart of another method for charging an adaptive power supply device provided in an embodiment of the present application;

[0072] Figure 9 A flowchart of another method for charging an adaptive power supply device provided in an embodiment of the present application;

[0073] Figure 10 A flowchart of another method for charging an adaptive power supply device provided in an embodiment of the present application;

[0074] Figure 11 A flowchart of another method for charging an adaptive power supply device provided in an embodiment of the present application;

[0075] Figure 12 A schematic diagram of the specific structure of another adaptive power supply device provided in an embodiment of the present application;

[0076] Figure 13 A method for Figure 12 A flow chart of the method for charging the adaptive power supply device.

[0077] Description of reference numerals:

[0078] 110-battery pack; 1101-first battery pack; 1102-second battery pack; 120-charging channel switching module; 1201-first control switch; 1202-second control switch; 1203-second on-board charger; 1204-third on-board charger; 130-charging port; 1301-DC charging port; 1302-AC charging port; 140-control module; 150-first on-board charger. DETAILED DESCRIPTION

[0079] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application are within the scope of protection of this application.

[0080] Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0081] The terms "first", "second" etc. in the specification and claims of the present application and the above-mentioned accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of identical attributes when describing them in the embodiments of the present application. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the front and back associated objects are a kind of "or" relationship. In addition, the terms "comprise" and "have" and any of their variations are intended to cover non-exclusive inclusion, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0082] As described in the background, the related art suffers from poor charging performance of adaptive power supply devices. When charging the adaptive power supply device at its highest rated voltage, the voltages of the multiple battery packs within the device are inconsistent. As a result, charging is terminated after any battery pack in the device is fully charged, preventing each of the multiple battery packs from being fully charged, severely impacting the charging performance of the device.

[0083] Based on this, an embodiment of the present application provides an adaptive power supply device, an electric vehicle and a charging method, in which a charging channel switching module is added between the N battery packs of the adaptive power supply device and the charging port. In this way, in the charging scenario of the adaptive power supply device, since the conduction condition between the positive input end of the charging channel switching module and each of the N positive charging ends of the charging channel switching module is adjustable, and the conduction condition between the negative input end of the charging channel switching module and each of the N negative charging ends of the charging channel switching module is adjustable, multiple adjustable charging channels can be built between the charging port and each of the N battery packs to realize the function of charging each of the N battery packs separately, and then each battery pack in the N battery packs is avoided from being affected by different voltages between battery packs in the charging scenario, and each of the N battery packs can be fully charged, thereby improving the charging effect of the adaptive power supply device.

[0084] In addition, the adaptive power supply device provided in the embodiment of the present application can also be intelligently controlled by monitoring the charging voltage value and the remaining power of the battery pack. It can perform AC and DC charging on the adaptive power supply device, and is compatible with DC charging piles of different voltages, and maintain balance between each battery pack during the charging process and at the end of charging.

[0085] In addition, the existing technology generally uses a high-voltage OBC (on-board charger) solution for AC charging scenarios, with one end connected to the AC charging station and the other end connected to a power supply component such as a battery pack. The development cycle of high-voltage OBCs is long and the voltage resistance performance of the components in the OBC DC part must be upgraded, which is costly. However, the embodiments of the present application directly use existing mature low-voltage OBC products, eliminating the need to develop an OBC with high output voltage (such as 800V). Therefore, the cost is low and the development cycle is also short.

[0086] In addition, the charging applicability of the high-voltage OBC in the prior art is poor. After the battery packs are connected in series, the highest voltage does not exceed the designed highest charging voltage. For example, the 800V OBC is only applicable to charging the adaptive power supply device with a highest voltage of 800V at most, and cannot charge the adaptive power supply device with a highest voltage of 1000V. However, the adaptive power supply device provided by the embodiment of the present application can be applicable to any high-voltage platform. As long as it is an adaptive power supply device composed of several battery packs, each battery pack can be independently charged through switch settings. For example, with the development of technology, when applied to the 1500V platform, the adaptive power supply device and charging scheme provided by the embodiment of the present application can also be adopted.

[0087] The following will combine the drawings and elaborate on the adaptive power supply device, electric vehicle, and charging method provided by the embodiments of the present application through specific embodiments and their application scenarios.

[0088] Figure 1 It is a schematic structural diagram of an adaptive power supply device provided by an embodiment of the present application.

[0089] As Figure 1 shown, the adaptive power supply device provided by the embodiment of the present application, which is applied to an electric vehicle, may include:

[0090] N battery packs 110 connected in series in sequence, a charging channel switching module 120, and a charging port 130; N is an integer greater than 1; where: <000 / 0201>

[0091] The charging channel switching module 120 has N positive charging terminals 1, N negative charging terminals 2, a positive input terminal 3, and a negative input terminal 4; the N positive charging terminals 1 of the charging channel switching module 120 are respectively connected to the positive electrodes of the N battery packs, the N negative charging terminals 2 of the charging channel switching module 120 are respectively connected to the negative electrodes of the N battery packs, the positive input terminal 3 of the charging channel switching module 120 is connected to the charging port 130, and the negative input terminal 4 of the charging channel switching module 120 is connected to the charging port 130;

[0092] Wherein, the conduction situation between the positive input terminal 3 of the charging channel switching module 120 and each positive charging terminal 1 among the N positive charging terminals of the charging channel switching module 120 is adjustable, and the conduction situation between the negative input terminal 4 of the charging channel switching module 120 and each negative charging terminal 2 among the N negative charging terminals of the charging channel switching module 120 is adjustable.

[0093] As Figure 1 shown, the adaptive power supply device includes N battery packs 110 connected in series, where 1 < n ≤ N, and N is an integer greater than 1.

[0094] In the embodiment of the present application, each battery pack 110 can be used independently, and the rated voltages of different battery packs 110 can be the same or slightly different. Each battery pack 110 can constitute an independent voltage platform, or a combination of at least two battery packs 110 can constitute an independent voltage platform. Each independent voltage platform can be connected to an electrical load, so that the adaptive power supply device can power both devices with non-upgraded voltages (such as 350V / 400V / 500V) and devices with upgraded voltages (such as 800V / 900V / 1000V), effectively reducing development cycles and costs.

[0095] In an embodiment of the present application, N battery packs 110 connected in series are connected to a charging port 130 via a charging channel switching module 120, wherein the conduction between the positive input terminal 3 of the charging channel switching module 120 and each positive charging terminal 1 of the N positive charging terminals of the charging channel switching module 120 is adjustable, and the conduction between the negative input terminal 4 of the charging channel switching module 120 and each negative charging terminal 2 of the N negative charging terminals of the charging channel switching module 120 is adjustable. Furthermore, the present application can establish multiple adjustable charging channels between the charging port and each of the N battery packs, so that the charging port can charge each battery pack 110 individually, or the charging port can charge a combination of at least two battery packs 110 individually, thereby realizing the function of charging N battery packs separately. In addition, in the charging scenario, each battery pack avoids the influence of different voltages between battery packs, and each of the N battery packs can be fully charged, thereby improving the charging effect of the adaptive power supply device.

[0096] According to an embodiment of the present application, an adaptive power supply device is provided, comprising N battery packs connected in series, a charging channel switching module and a charging port; N is an integer greater than 1; wherein: the charging channel switching module has N positive charging terminals, N negative charging terminals, a positive input terminal and a negative input terminal; the N positive charging terminals of the charging channel switching module are connected one-to-one with the positive poles of the N battery packs, the N negative charging terminals of the charging channel switching module are connected one-to-one with the negative poles of the N battery packs, the positive input terminal of the charging channel switching module is connected to the charging port, and the negative input terminal of the charging channel switching module is connected to the charging port; wherein the conductivity between the positive input terminal of the charging channel switching module and each of the N positive charging terminals of the charging channel switching module is adjustable, and the conductivity between the negative input terminal of the charging channel switching module and each of the N negative charging terminals of the charging channel switching module is adjustable. In this way, in the charging scenario of the adaptive power supply device, since the conductivity between the positive input end of the charging channel switching module and each of the N positive charging ends of the charging channel switching module is adjustable, and the conductivity between the negative input end of the charging channel switching module and each of the N negative charging ends of the charging channel switching module is adjustable, multiple adjustable charging channels can be built between the charging port and each of the N battery packs to realize the function of charging each of the N battery packs separately, and then each battery pack in the N battery packs is avoided from being affected by different voltages between battery packs in the charging scenario, and each of the N battery packs can be fully charged, thereby improving the charging effect of the adaptive power supply device.

[0097] In a specific embodiment, Figure 2 As shown, the adaptive power supply device provided in the embodiment of the present application may further include a control module 140 , which is connected to the charging channel switching module 120 .

[0098] In an embodiment of the present application, the control module 140 can be used to switch the charging port 130 to be connected to the target battery pack by controlling the conductivity of the positive input terminal 3 of the charging channel switching module 120 and each positive charging terminal 1 among the N positive charging terminals of the charging channel switching module 120, and controlling the conductivity of the negative input terminal 4 of the charging channel switching module 120 and each negative charging terminal 2 among the N negative charging terminals of the charging channel switching module 120; when the charging port is connected to the target battery pack, the target battery pack is charged.

[0099] The target battery pack includes at least one battery pack among the N battery packs.

[0100] For example, the target battery group may include any one of the N battery groups; or the target battery group may be a target combined battery group, which includes at least two of the N battery groups.

[0101] For example, when the target battery group includes any one of N battery groups, the control module 140 can be used to switch the charging port 130 to connect with the i-th battery group 110 among the N battery groups 110 by controlling the positive input terminal 3 of the charging channel switching module 120 to connect with the i-th positive charging terminal 1 of the charging channel switching module 120, and controlling the negative input terminal 4 of the charging channel switching module 120 to connect with the i-th negative charging terminal 2 of the charging channel switching module 120; when the charging port 130 is connected with the i-th battery group 110, the i-th battery group 110 is charged; wherein i is a positive integer less than or equal to N.

[0102] For another example, when the target battery pack is a target combined battery pack, the control module 140 can be used to switch the charging port 130 to be connected to the target combined battery pack by controlling the positive input terminal 3 of the charging channel switching module 120 to be connected to the kth positive charging terminal 1 of the charging channel switching module 120, and controlling the negative input terminal 4 of the charging channel switching module 120 to be connected to the k+mth negative charging terminal 2 of the charging channel switching module 120; when the charging port 130 is connected to the target combined battery pack, the target combined battery pack is charged; wherein k is a positive integer less than N, and m is a positive integer; the target combined battery pack includes the kth battery pack to the k+mth battery pack connected in series among the N battery packs 110.

[0103] In this way, the control module 140 can specifically switch the charging port 130 to connect with the target battery pack, wherein the target battery pack includes at least one battery pack among the N battery packs, so as to achieve independent charging of the target battery pack in a subsequent charging scenario.

[0104] In practical applications, the control module 140 can execute the charging method for the adaptive power supply device provided in the embodiment of the present application, and the control module 140 is integrated into the controller of the electric vehicle. Specifically, the control module 140 of the present application can be integrated into the controller of the electric vehicle, such as the BMS (Battery Management System) or VCU (Vehicle Control Unit) of the electric vehicle, that is, the original BMS or VCU controller of the electric vehicle can be improved to have the functions of the above control module, thereby saving circuit space and cost.

[0105] In a specific embodiment, Figure 3 As shown, in the adaptive power supply device provided in the embodiment of the present application, the charging port 130 includes at least one of a DC charging port 1301 and an AC charging port 1302 .

[0106] The DC charging port 1301 provides a DC voltage as a charging voltage to at least one of the N battery packs, and the AC charging port 1302 provides an AC voltage as a charging voltage to at least one of the N battery packs.

[0107] Among them, the DC voltage at the DC charging port can be 400V, 750V or 900V, etc. This application does not limit the specific number of the DC voltage.

[0108] Among them, the AC voltage at the AC charging port can be 220V or 380V, etc. This application does not limit the specific number of the AC voltage.

[0109] In this way, regardless of whether it is an AC charging scenario or a DC charging scenario, each of the N battery packs can be fully charged, thereby expanding the application scope of the charging method of the adaptive power supply device.

[0110] The above describes the use of the charging channel switching module 120 to switch the charging port 130 to different battery packs 110 to charge each battery pack 110 separately. The specific structure of the charging channel switching module 120 can be implemented in different ways, which are described below with examples.

[0111] In a specific embodiment, Figure 4 As shown, in the adaptive power supply device provided in the embodiment of the present application, the charging channel switching module 120 includes a first control switch 1201 and a second control switch 1202;

[0112] The first control switch 1201 has an input end and N output ends. The input end of the first control switch 1201 is connected to the charging port 130, and the N output ends of the first control switch 1201 are connected to the positive electrodes of the N battery packs 110 in a one-to-one correspondence.

[0113] The second control switch 1202 has an input end and N output ends. The input end of the second control switch 1202 is connected to the charging port 130 , and the N output ends of the second control switch 1202 are connected to the negative electrodes of the N battery packs 110 in a one-to-one correspondence.

[0114] like Figure 4As shown, when the charging channel switching module 120 includes a first control switch 1201 and a second control switch 1202, the input end of the first control switch 1201 corresponds to the positive input end 3 of the charging channel switching module 120, and the N output ends of the first control switch 1201 correspond to the N positive charging ends 1 of the charging channel switching module 120; the input end of the second control switch 1202 corresponds to the negative input end 4 of the charging channel switching module 120, and the N output ends of the second control switch 1202 correspond to the N negative charging ends 2 of the charging channel switching module 120.

[0115] In practical applications, the first control switch 1201 / the second control switch 1202 can be a single-pole multi-throw switch, a relay assembly, a triode, a transistor, or a logic control switch in an integrated circuit, etc. This application does not limit the specific switch type of the first control switch / the second control switch.

[0116] In practical applications, the first control switch 1201 / the second control switch 1202 can be a control switch with multiple output channels, or a combination of multiple control switches, etc. This application does not limit the specific structure of the first control switch / the second control switch.

[0117] In this way, the embodiment of the present application uses the first control switch 1201 and the second control switch 1202 to realize the alternating charging of each battery pack 110 in the N battery packs 110, so that each battery pack in the N battery packs is fully charged, thereby improving the charging effect of the adaptive power supply device.

[0118] Furthermore, by adding a control switch to switch the charging port to connect to different battery packs, circuit space and cost are saved, and the development cycle is also shortened.

[0119] like Figure 4 As shown, in the case where the adaptive power supply device provided in the embodiment of the present application further includes a control module 140, the control module 140 is connected to the first control switch 1201 and the second control switch 1202 respectively;

[0120] The control module 140 is used to control the conduction between the input end of the first control switch 1201 and each of the N output ends, and to control the conduction between the input end of the second control switch 1202 and each of the N output ends.

[0121] In this way, the control module 140 can switch the charging port 130 to connect with the target battery pack in a targeted manner by controlling the different conduction paths of the first control switch 1201 and the second control switch 1202, wherein the target battery pack includes at least one battery pack among N battery packs, so as to facilitate independent charging of the target battery pack in subsequent charging scenarios.

[0122] like Figure 4 As shown, in the adaptive power supply device provided in an embodiment of the present application, when the charging port 130 includes a DC charging port 1301 , the input end of the first control switch 1201 is connected to the DC charging port 1301 , and the input end of the second control switch 1202 is connected to the DC charging port 1301 .

[0123] like Figure 4 As shown, in the adaptive power supply device provided in an embodiment of the present application, when the charging port 130 includes an AC charging port 1302, the adaptive power supply device also includes a first vehicle-mounted charger 150, which is used to convert AC into DC; the input end of the first control switch 1201 is connected to the AC charging port 1302 through the first vehicle-mounted charger 150, and the input end of the second control switch 1202 is connected to the AC charging port 1302 through the first vehicle-mounted charger 150.

[0124] The first onboard charger 150 is used to convert the AC charging voltage at the charging port 130 into a DC voltage to charge each battery pack.

[0125] In this way, whether it is a DC charging scenario or an AC charging scenario, the embodiments of the present application can use the first control switch 1201 and the second control switch 1202 to realize the alternating charging of each battery group 110 in the N battery groups 110, so that each battery group in the N battery groups is fully charged, thereby improving the charging effect of the adaptive power supply device and expanding the application scope of the charging method of the adaptive power supply device.

[0126] In another specific embodiment, the charging channel switching module 120 may be composed of other structures. Figure 5 As shown, in the adaptive power supply device provided in the embodiment of the present application, when the charging port 130 includes an AC charging port 1302, the charging channel switching module 120 can be a second vehicle charger 1203 with multi-channel output;

[0127] The second onboard charger 1203 has N positive charging terminals 1, N negative charging terminals 2, a positive input terminal 3, and a negative input terminal 4;

[0128] The N positive charging terminals 1 of the second onboard charger 1203 are connected to the positive electrodes of the N battery packs 110 in a one-to-one correspondence, the N negative charging terminals 2 of the second onboard charger 1203 are connected to the negative electrodes of the N battery packs 110 in a one-to-one correspondence, the positive input terminal 3 of the second onboard charger 1203 is connected to the AC charging port 1302, and the negative input terminal 4 of the second onboard charger 1203 is connected to the AC charging port 1302;

[0129] Among them, the conductivity between the positive input terminal 3 of the second vehicle charger 1203 and each positive charging terminal 1 of the N positive charging terminals of the second vehicle charger 1203 is adjustable, and the conductivity between the negative input terminal 4 of the second vehicle charger 1203 and each negative charging terminal 2 of the N negative charging terminals of the second vehicle charger 1203 is adjustable.

[0130] like Figure 5 As shown, in the case where the charging channel switching module 120 is a second on-board charger 1203 with multi-channel output, the positive input terminal of the second on-board charger 1203 corresponds to the positive input terminal 3 of the charging channel switching module 120, and the N positive charging terminals of the second on-board charger 1203 correspond to the N positive charging terminals 1 of the charging channel switching module 120; the negative input terminal of the second on-board charger 1203 corresponds to the negative input terminal 4 of the charging channel switching module 120, and the N negative charging terminals of the second on-board charger 1203 correspond to the N negative charging terminals 2 of the charging channel switching module 120.

[0131] In the embodiment of the present application, the second onboard charger 1203 has multiple output channels, each of which can be used to independently charge each battery pack in the N battery packs 110. The second onboard charger 1203 can be used to convert the AC charging voltage into a DC voltage to charge each battery pack in the N battery packs 110.

[0132] In this way, in the AC charging scenario, the embodiment of the present application can use a second on-board charger 1203 with multi-channel output to fully charge each of the N battery packs, thereby improving the charging effect of the adaptive power supply device.

[0133] It should be noted that for AC charging of adaptive power supply equipment, existing technology generally selects an OBC based on the maximum voltage of the adaptive power supply equipment. For example, if the maximum voltage of the adaptive power supply equipment is 800V, a high-voltage OBC adapted to 800V is selected for AC charging. The main problem with this charging method is that to boost the voltage of the currently mature OBC from 400V to 800V, the voltage withstand performance of the OBC's DC output must be doubled, which significantly increases the voltage withstand requirements of the related electronic components and materials. After redesign, various verification tests and trials are required, which generally takes more than two years, resulting in a long development cycle. Furthermore, the limited number of suppliers available increases costs. Secondly, when the maximum voltage of the high-voltage OBC used to charge the adaptive power supply equipment (for example, 800V) is inconsistent among the battery packs within the adaptive power supply equipment, charging will terminate when any battery pack is fully charged, preventing every battery pack from being fully charged, seriously affecting the charging effect.

[0134] In this embodiment, the multi-channel output second on-board charger 1203 does not need to be redesigned based on component voltage performance changes, and can still use the current mature OBC (e.g., 400V), which still has cost advantages. In addition, each of the N battery packs can be fully charged, improving the charging efficiency of the adaptive power supply device.

[0135] In addition, with Figure 4 Compared with the scheme of adding a control switch shown in the figure, this scheme (corresponding to Figure 5 ) provides a second on-board charger 1203 with multi-channel output, which redesigns multiple output channels for the existing OBC and has a long development cycle.

[0136] Furthermore, in actual applications, the charging power of the second onboard charger 1203 with multiple output channels is relatively low, making it difficult to improve charging efficiency. Therefore, to increase charging power, the charging channel switching module 120 can also be composed of multiple onboard chargers, provided that the upper limit of the charging power is permitted. In the embodiment of the present application, multiple onboard chargers can also be used to perform AC charging of the adaptive power supply device, as illustrated below.

[0137] In a specific embodiment, Figure 6 As shown, in the adaptive power supply device provided in the embodiment of the present application, when the charging port 130 includes an AC charging port 1302, the charging channel switching module 120 includes N third on-board chargers 1204 with single-channel outputs;

[0138] The positive charging terminals 1 of the N third on-board chargers 1204 are connected one-to-one with the positive poles of the N battery packs 110, the negative charging terminals 2 of the N third on-board chargers 1204 are connected one-to-one with the negative poles of the N battery packs 110, the positive input terminals 3 of the N third on-board chargers 1204 are all connected to the AC charging port 1302, and the negative input terminals 4 of the N third on-board chargers 1204 are all connected to the AC charging port 1302.

[0139] like Figure 6 As shown, in the case where the charging channel switching module 120 includes N third on-board chargers 1204 with single-channel outputs, the positive input terminal of the third on-board charger 1204 corresponds to the positive input terminal 3 of the charging channel switching module 120, and the positive charging terminals of the N third on-board chargers 1204 correspond to the N positive charging terminals 1 of the charging channel switching module 120; the negative input terminal of the third on-board charger 1204 corresponds to the negative input terminal 4 of the charging channel switching module 120, and the negative charging terminals of the N third on-board chargers 1204 correspond to the N negative charging terminals 2 of the charging channel switching module 120.

[0140] Wherein, when the adaptive power supply device provided in the embodiment of the present application further includes a control module, the N single-channel output third on-board chargers 1204 can be respectively connected to the control module ( Figure 6 (not shown), in this way, the control module 140 can control each of the N third on-board chargers 1204 to work independently, and specifically switch the charging port 130 to connect with the target battery pack, wherein the target battery pack includes at least one battery pack among the N battery packs, so as to facilitate independent charging of the target battery pack in a subsequent charging scenario.

[0141] like Figure 6 As shown, each third on-board charger 1204 is individually controlled for charging each battery pack, and each third on-board charger 1204 can work individually or simultaneously. In this way, when the available power is high, multiple third on-board chargers 1204 are used for charging at the same time, which can increase the charging power and shorten the charging time of the adaptive power supply device.

[0142] However, in practical applications, Figure 4 Compared with the scheme of adding a control switch shown in the figure, this scheme (corresponding to Figure 6 ) provides N third on-board chargers at an additional cost.

[0143] Of course, in practical applications, the charging channel switching module 120 can also be composed of other structures, and this application does not impose any specific restrictions on this.

[0144] Based on the same concept as the adaptive power supply device provided in the embodiments of this application, this application also provides a method for charging any of the above adaptive power supply devices. This application provides a method for charging any of the above adaptive power supply devices that can be applied to electric vehicles, as described below with examples.

[0145] Figure 7 A flowchart of a method for charging an adaptive power supply device provided in an embodiment of the present application.

[0146] like Figure 7 As shown, an embodiment of the present application provides a method for charging an adaptive power supply device, which may include:

[0147] Step 710: Switching the charging port to connect to the target battery pack by controlling the conductivity between the positive input terminal of the charging channel switching module and each of the N positive charging terminals of the charging channel switching module, and controlling the conductivity between the negative input terminal of the charging channel switching module and each of the N negative charging terminals of the charging channel switching module.

[0148] Step 720: When the charging port is connected to the target battery pack, charge the target battery pack, wherein the target battery pack includes at least one battery pack among the N battery packs.

[0149] In the embodiment of the present application, the charging port 130 can be switched to be connected to each target battery pack in a targeted manner, so as to realize independent charging of each target battery pack in a subsequent charging scenario.

[0150] The specific implementation method can refer to any of the above embodiments and will not be repeated here.

[0151] According to the method for charging an adaptive power supply device provided in an embodiment of the present application, the charging port is switched to be connected to the target battery pack by controlling the conduction condition between the positive input terminal of the charging channel switching module and each of the N positive charging terminals of the charging channel switching module, and controlling the conduction condition between the negative input terminal of the charging channel switching module and each of the N negative charging terminals of the charging channel switching module; when the charging port is connected to the target battery pack, the target battery pack is charged, wherein the target battery pack includes at least one of the N battery packs battery pack, so that the present application can switch the charging port to connect with the target battery pack, and build multiple adjustable charging channels between the charging port and each of the N battery packs, so that the charging port can charge each battery pack 110 individually, or the charging port can charge the combination of at least two battery packs 110 individually, thereby realizing the function of charging each of the N battery packs separately, and then each battery pack in the charging scenario avoids the influence of different voltages between battery packs, and can fully charge each of the N battery packs, thereby improving the charging effect of the adaptive power supply device.

[0152] In a specific embodiment, the target battery pack includes any one of the N battery packs, so that each of the N battery packs can be charged separately.

[0153] like Figure 8 As shown, an embodiment of the present application provides a method for charging an adaptive power supply device, which may include:

[0154] Step 810: The charging port is switched to connect to the i-th battery pack among the N battery packs by controlling the positive input terminal of the charging channel switching module to connect to the i-th positive charging terminal of the charging channel switching module, and controlling the negative input terminal of the charging channel switching module to connect to the i-th negative charging terminal of the charging channel switching module.

[0155] Step 820: When the charging port is connected to the i-th battery pack, charge the i-th battery pack; wherein i is a positive integer less than or equal to N.

[0156] Among them, step 810 can be a sub-step of step 710, and step 820 can be a sub-step of step 720.

[0157] In an embodiment of the present application, the charging port 130 can be switched to connect to each of the N battery packs in a targeted manner, so that in the subsequent charging scenario, each target battery pack can be independently charged, ensuring that each of the N battery packs is fully charged, thereby improving the charging effect of the adaptive power supply device.

[0158] In another specific embodiment, the target battery pack may be a target combined battery pack, which includes at least two battery packs among the N battery packs, so as to facilitate simultaneous charging of the at least two battery packs among the N battery packs.

[0159] like Figure 9 As shown, an embodiment of the present application provides a method for charging an adaptive power supply device, which may include:

[0160] Step 910: Switching the charging port to connect to the target battery pack by controlling the positive input terminal of the charging channel switching module to connect to the kth positive charging terminal of the charging channel switching module, and controlling the negative input terminal of the charging channel switching module to connect to the k+mth negative charging terminal of the charging channel switching module; wherein k is a positive integer less than N, and m is a positive integer;

[0161] Step 920: When the charging port is connected to the target assembled battery pack, charge the target assembled battery pack; wherein the target assembled battery pack includes the kth battery pack to the k+mth battery pack connected in series among the N battery packs.

[0162] Among them, step 910 can be a sub-step of step 710, and step 920 can be a sub-step of step 720.

[0163] In an embodiment of the present application, the charging port 130 can be switched to connect to at least two of the N battery packs in a targeted manner, so that in subsequent charging scenarios, multiple battery packs can be charged simultaneously, thereby improving charging efficiency and shortening charging time.

[0164] Furthermore, in practical applications, during the process of charging each of the N battery packs separately in the embodiment of the present application, there is a problem of voltage imbalance among the battery packs due to inconsistent voltages among the battery packs. To address the voltage imbalance during the charging process of each battery pack, the embodiment of the present application can adopt an intelligent control strategy for the linkage of the battery packs. By monitoring the difference in the state of charge (SOC, which can represent the remaining power of the battery) of different battery packs, the charging channel is intelligently switched so that the battery packs are charged in turn, ensuring voltage balance among the battery packs during and at the end of charging. The following examples are provided for description.

[0165] In a specific embodiment, Figure 10 As shown, in the method for charging an adaptive power supply device provided in an embodiment of the present application, in the above step 720, when the charging port is connected to the target battery pack, charging the target battery pack may include:

[0166] Step 1010: Determine the voltage type of the charging voltage at the charging port; the voltage type includes at least one of an AC voltage and a DC voltage;

[0167] in, Figure 10 AC means alternating current voltage, and DC means direct current voltage;

[0168] Step 1020: When the charging voltage at the charging port is a DC voltage, determine whether the charging voltage is less than a first threshold;

[0169] Among them, a charging voltage less than the first threshold can be understood as a low-voltage DC charging mode, and a charging voltage greater than or equal to the first threshold can be understood as a high-voltage DC charging mode. For example, a first threshold of 500V and a charging voltage of 400V correspond to a low-voltage DC charging mode; a charging voltage of 750V or 900V corresponds to a high-voltage DC charging mode. Of course, the first threshold can also be other values, and this application can set it according to actual needs, and this application does not impose any restrictions on this.

[0170] Wherein, when the charging voltage at the charging port is an AC voltage, or when the charging voltage at the charging port is a DC voltage and the charging voltage is less than a first threshold, the following steps are performed:

[0171] Step 1030: Determine a first target battery group from the N battery groups, where the first target battery group is the battery group with the lowest remaining power among the N battery groups;

[0172] The remaining capacity of the battery pack can be represented by SOC, and the SOC increases when the battery pack is charged.

[0173] Step 1040: When the charging port is switched to connect to a first target battery pack, charging the first target battery pack until the difference between the remaining power of the first target battery pack and the remaining power of a second target battery pack reaches a second threshold; the second target battery pack is any battery pack among the N battery packs except the first target battery pack;

[0174] Among them, the second threshold can reflect the degree of voltage balance of different battery groups. When the difference in the remaining power of two battery groups is less than the second threshold, the voltages of the two battery groups are relatively balanced; when the difference in the remaining power of the two battery groups is greater than the second threshold, the voltages of the two battery groups are relatively unbalanced.

[0175] Among them, the present application can set the value of the second threshold according to actual needs, such as 4%, 5% or 6%, etc., and the present application does not impose any limitation on this.

[0176] Step 1050: When the charging port is switched to connect to the second target battery pack, the second target battery pack is charged until the difference between the remaining power of the second target battery pack and the remaining power of a third target battery pack reaches a second threshold; the third target battery pack is any battery pack among the N battery packs except the second target battery pack;

[0177] Step 1060: When the charging port is switched to be connected to the third target battery pack, charging the third target battery pack to increase the remaining power of the third target battery pack;

[0178] Step 1070: Based on the remaining power of each battery pack in the N battery packs, charge each battery pack in turn until the remaining power of each battery pack reaches a third threshold.

[0179] Among them, the third threshold can reflect the final power after charging. For example, if the remaining power of the battery pack is expressed as a percentage, the third threshold can be 100% (corresponding to fully charging the battery pack), or 99%, etc. This application can be set according to actual needs.

[0180] In an embodiment of the present application, in an AC voltage charging mode, or in a low-voltage DC charging mode, the present application adopts a first intelligent control strategy (corresponding to steps 1030 to 1070), intelligently switching charging channels so that each battery group is charged in turn: first charge the first target battery group with the lowest remaining power; when the difference between the remaining power of the first target battery group and any other battery group reaches a second threshold, switch to another battery group for charging until its remaining power exceeds the second threshold than that of the other battery groups; repeat the above process, charging each battery group in turn until the remaining power of each battery group reaches a third threshold.

[0181] In this way, in the AC voltage charging mode, or in the low-voltage DC charging mode, by comparing the difference between the remaining power of any two battery packs with the second threshold, each battery pack is charged in turn, ensuring voltage balance between the battery packs during the charging process and at the end of charging.

[0182] In a specific embodiment, Figure 11 As shown, when the charging voltage is a DC voltage and the charging voltage is greater than or equal to the first threshold, the method for charging an adaptive power supply device provided in an embodiment of the present application may further include:

[0183] Step 1110: When the charging voltage is a DC voltage and the charging voltage is greater than or equal to a first threshold, determine a first target battery group and a fourth target battery group from the N battery groups; the first target battery group is the battery group with the lowest remaining power among the N battery groups, and the fourth target battery group is the battery group with the highest remaining power among the N battery groups;

[0184] Step 1120: Determine whether the difference between the remaining power of the first target battery group and the fourth target battery group is less than a second threshold;

[0185] When the difference between the remaining power of the first target battery group and the fourth target battery group is less than a second threshold, the following steps are performed:

[0186] Step 1130: When the charging port is switched to be connected to all the N battery packs, the N battery packs are charged simultaneously until the remaining power of the fourth target battery pack reaches a third threshold;

[0187] Step 1140: When the charging port is switched to connect to the fifth target battery pack, the fifth target battery pack is charged until the remaining power of each of the N battery packs reaches a third threshold; the fifth target battery pack is each of the N battery packs except the fourth target battery pack;

[0188] Alternatively, when the difference between the remaining power of the first target battery group and the fourth target battery group is greater than or equal to the second threshold, the following steps are performed:

[0189] Step 1150: When the charging port is switched to connect to the fifth target battery pack, the fifth target battery pack is charged based on the remaining power of the fourth target battery pack until the remaining power of each of the N battery packs is equal;

[0190] Step 1160: When the charging port is switched to be connected to all the N battery packs, the N battery packs are charged simultaneously until the remaining power of each of the N battery packs reaches a third threshold.

[0191] Here, step 1110 may be performed after step 1020 .

[0192] In the embodiment of the present application, in the high-voltage DC charging mode, the present application adopts a second intelligent control strategy (corresponding to steps 1110 to 1160), which intelligently switches the charging channels so that each battery pack is charged in turn:

[0193] It is determined whether the difference between the remaining capacities of any two battery packs (for example, the difference in remaining capacities is represented by ΔSOC) is less than a second threshold.

[0194] When ΔSOC is less than the second threshold, first switch to high-voltage DC charging and charge N battery packs simultaneously until the remaining power of one battery pack reaches the third threshold; then switch to low-voltage DC charging and charge other target battery packs separately until the remaining power of all N battery packs reaches the third threshold.

[0195] When ΔSOC is greater than or equal to the second threshold, first switch to low-voltage DC charging, and charge the battery packs except the battery pack with the highest remaining power until the remaining power of the N battery packs is consistent; then switch to high-voltage DC charging, and charge the N battery packs at the same time until the remaining power of the N battery packs reaches the third threshold.

[0196] Thus, in the high-voltage DC charging mode, by comparing the difference ΔSOC between the remaining charges of any two battery packs with a second threshold, a period of low-voltage DC charging is performed before or after the high-voltage DC charging, thereby ensuring voltage balance between the battery packs during and at the end of the charging process.

[0197] In practical applications, taking N=2 as an example, Figure 12 The adaptive power supply device shown may include two battery packs connected in series (for example, a first battery pack 1101 and a second battery pack 1102), a first control switch 1201 specifically a first single-pole double-throw switch, and a second control switch 1202 specifically a second single-pole double-throw switch, such as Figure 13 As shown, the embodiment of the present application provides a method for Figure 12 The charging method of the adaptive power supply device shown may include the following four charging modes:

[0198] (1) When it is detected that the external charging gun has been plugged in and charging begins, the charging voltage is first determined to be AC ​​voltage or DC voltage. If it is AC voltage, there is no need to determine the difference in remaining power between the battery packs. The charging mode can be directly entered to start charging the battery pack with the lower SOC:

[0199] a) Controlling the first single-pole double-throw switch and the second single-pole double-throw switch to switch to a set position, so that the charging port is connected to the positive and negative electrodes of the battery pack with the lower SOC, and charging the battery pack with the lower SOC until its SOC exceeds that of the other battery packs by more than 5%; (for example, assuming that the SOC of the first battery pack 1101 is lower, connecting the first single-pole double-throw switch 1201 and the second single-pole double-throw switch 1202 to the upper position to charge the first battery pack 1101);

[0200] b) At this time, the first single-pole double-throw switch and the second single-pole double-throw switch are controlled to switch to another set position, so that the charging port is connected to the positive and negative electrodes of the other battery pack, and the SOC of the other battery pack is charged to more than 5% of that of the high-voltage battery pack. (For example, the first single-pole double-throw switch 1201 and the second single-pole double-throw switch 1202 are connected to the lower position to charge the second battery pack 1102 until its SOC exceeds 5% of that of the first battery pack 1101);

[0201] c) Repeat the above two steps until each battery pack reaches the set SOC value, and then AC charging is completed.

[0202] (2) When it is detected that the external charging pile is DC charging, the voltage of the DC charging pile is first determined. If it is DC low voltage charging (such as 400-500V), then the charging method is the same as the above-mentioned AC charging. First, charge the battery pack with low SOC until its SOC exceeds 5% of the other battery packs; then charge the other battery pack until its SOC exceeds 5% of the other battery packs; repeat this process until each battery pack reaches the set SOC value, and DC charging ends.

[0203] (3) When it is detected that the external charging pile is DC charging, if it is DC high voltage charging (such as 800-1000V), the SOC difference between the battery packs is first judged. If the ΔSOC of the two battery packs is greater than 5%, the two battery packs are seriously unbalanced. In order to avoid the difference in charging rate caused by imbalance, reduce heat generation, and shorten charging time, this solution can first switch to low-voltage DC charging and charge the lower SOC battery pack until its SOC is equal to that of the higher SOC battery pack. Then, through switch control, adjust to high-voltage DC charging until the set SOC state is reached. Since the voltage balance between the battery packs has been achieved during low-voltage DC charging, there is no need to balance after high-voltage DC charging in this case.

[0204] For example, Figure 12 In the embodiment, when it is monitored that the SOC of the second battery pack 1102 is more than 5% greater than the SOC of the first battery pack 1101, the first single-pole double-throw switch 1201 and the second single-pole double-throw switch 1202 are first controlled to be connected to the upper position to charge the first battery pack 1101 until the SOC of the first battery pack 1101 is equal to the SOC of the second battery pack 1102; then, the first single-pole double-throw switch 1201 is controlled to be connected to the upper position and the second single-pole double-throw switch 1202 is connected to the lower position, switching to high-voltage DC charging, and charging the first battery pack 1101 and the second battery pack 1102 at the same time until the first battery pack 1101 and the second battery pack 1102 are charged to the set SOC value, at which time charging is terminated.

[0205] (4) When it is detected that the external DC charging is in progress and the SOC difference between any two battery packs is less than 5%, in order to increase the charging power (power = voltage * current, generally the maximum current is fixed), high-voltage DC charging can be used directly to charge the first battery pack 1101 and the second battery pack 1102 simultaneously until the highest voltage battery pack is charged to the set SOC value. Then, low-voltage DC charging is switched until the other battery packs are charged to the set SOC value.

[0206] For example, in Figure 12 In the embodiment of the present invention, when the difference between the SOC of the first battery pack 1101 and the SOC of the second battery pack 1102 is ≤ 5%, the first single-pole double-throw switch 1201 is connected to the upper position and the second single-pole double-throw switch 1202 is connected to the lower position, and high-voltage DC charging begins (charging the first battery pack 1101 and the second battery pack 1102 simultaneously). Assuming that the SOC of the second battery pack 1102 is higher, the second battery pack 1102 reaches the set SOC value first; at this time, the first single-pole double-throw switch 1201 and the second single-pole double-throw switch 1202 are adjusted to the upper position, and the first battery pack 1101 is charged alone to reach the set SOC value.

[0207] It is understandable that in the prior art, high voltage (e.g., 800-1000V) is used to charge multiple battery packs connected in series. If there is a voltage difference between the battery packs, each battery pack cannot be fully charged. However, the adaptive power supply device provided in the embodiment of the present application can charge each battery pack independently, without being affected by the different battery pack voltages, and can fully charge each battery pack or charge it to the set SOC value, thereby improving the charging effect.

[0208] In addition, the adaptive power supply device provided in the embodiment of the present application can intelligently control the battery pack in each charging stage by monitoring the charging voltage and the SOC of the battery pack. It can perform AC and DC charging on the adaptive power supply device, is compatible with DC charging piles of different voltages, and maintains balance between the battery packs during and at the end of charging.

[0209] Based on the same concept as the adaptive power supply device provided in the embodiments of the present application, the present application also provides an electric vehicle, including any of the above-mentioned adaptive power supply devices.

[0210] For an introduction to the electric vehicle provided in this application, please refer to the above-mentioned embodiment of the adaptive power supply device, and this application will not go into details here.

[0211] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An adaptive power supply device, characterized in that: Applicable to electric vehicles, comprising: N battery packs connected in series, a charging channel switching module, and a charging port; N is an integer greater than 1; wherein: The charging channel switching module has N positive charging terminals, N negative charging terminals, a positive input terminal, and a negative input terminal; the N positive charging terminals of the charging channel switching module are connected one-to-one with the positive electrodes of the N battery packs, the N negative charging terminals of the charging channel switching module are connected one-to-one with the negative electrodes of the N battery packs, the positive input terminal of the charging channel switching module is connected to the charging port, and the negative input terminal of the charging channel switching module is connected to the charging port; The conduction between the positive input terminal of the charging channel switching module and each of the N positive charging terminals of the charging channel switching module is adjustable, and the conduction between the negative input terminal of the charging channel switching module and each of the N negative charging terminals of the charging channel switching module is adjustable; The adaptive power supply device further includes a control module, which is connected to the charging channel switching module; the control module is used to: Determining a voltage type of a charging voltage at the charging port; the voltage type includes at least one of an alternating current voltage and a direct current voltage; When the charging voltage at the charging port is a DC voltage, determining whether the charging voltage is less than a first threshold; When the charging voltage at the charging port is an AC voltage, or when the charging voltage at the charging port is a DC voltage and the charging voltage is less than a first threshold, perform the following steps: Determine a first target battery group from the N battery groups; the first target battery group is the battery group with the lowest remaining power among the N battery groups; When the charging port is switched to connect to a first target battery group, the first target battery group is charged until the difference between the remaining power of the first target battery group and the remaining power of a second target battery group reaches a second threshold; the second target battery group is any battery group among the N battery groups except the first target battery group; When the charging port is switched to connect to the second target battery group, the second target battery group is charged until the difference between the remaining power of the second target battery group and the remaining power of the third target battery group reaches a second threshold; the third target battery group is any battery group among the N battery groups except the second target battery group; When the charging port is switched to be connected to the third target battery pack, charging the third target battery pack to increase the remaining power of the third target battery pack; Based on the remaining power of each battery pack in the N battery packs, each battery pack is charged in turn until the remaining power of each battery pack reaches a third threshold.

2. The adaptive power supply device according to claim 1, wherein: The control module is used to switch the charging port to be connected to the target battery pack by controlling the conductivity between the positive input end of the charging channel switching module and each of the N positive charging ends of the charging channel switching module, and controlling the conductivity between the negative input end of the charging channel switching module and each of the N negative charging ends of the charging channel switching module; when the charging port is connected to the target battery pack, the target battery pack is charged; wherein, the target battery pack includes at least one battery pack among the N battery packs.

3. The adaptive power supply device according to claim 1, wherein: The charging port includes at least one of a DC charging port and an AC charging port.

4. The adaptive power supply device according to claim 1, wherein: The charging channel switching module includes a first control switch and a second control switch; The first control switch has an input end and N output ends, the input end of the first control switch is connected to the charging port, and the N output ends of the first control switch are connected to the positive electrodes of the N battery packs in a one-to-one correspondence; The second control switch has an input end and N output ends. The input end of the second control switch is connected to the charging port, and the N output ends of the second control switch are connected to the negative electrodes of the N battery packs in a one-to-one correspondence.

5. The adaptive power supply device according to claim 4, wherein: In the case where the adaptive power supply device includes a control module, the control module is connected to the first control switch and the second control switch respectively; The control module is used to control the conduction between the input end of the first control switch and each of the N output ends, and to control the conduction between the input end of the second control switch and each of the N output ends.

6. The adaptive power supply device according to claim 4, wherein: In the case where the charging port includes a DC charging port, the input end of the first control switch is connected to the DC charging port, and the input end of the second control switch is connected to the DC charging port; and / or, In the case where the charging port includes an AC charging port, the adaptive power supply device also includes a first vehicle-mounted charger, which is used to convert AC into DC; the input end of the first control switch is connected to the AC charging port through the first vehicle-mounted charger, and the input end of the second control switch is connected to the AC charging port through the first vehicle-mounted charger.

7. The adaptive power supply device according to claim 1, wherein: In the case where the charging port includes an AC charging port, the charging channel switching module is a second on-board charger with multi-channel output; The second on-board charger has N positive charging terminals, N negative charging terminals, a positive input terminal, and a negative input terminal; The N positive charging terminals of the second on-board charger are connected to the positive electrodes of the N battery packs in a one-to-one correspondence, the N negative charging terminals of the second on-board charger are connected to the negative electrodes of the N battery packs in a one-to-one correspondence, the positive input terminal of the second on-board charger is connected to the AC charging port, and the negative input terminal of the second on-board charger is connected to the AC charging port; Among them, the conductivity between the positive input terminal of the second vehicle charger and each of the N positive charging terminals of the second vehicle charger is adjustable, and the conductivity between the negative input terminal of the second vehicle charger and each of the N negative charging terminals of the second vehicle charger is adjustable.

8. The adaptive power supply device according to claim 1, wherein: In the case where the charging port includes an AC charging port, the charging channel switching module includes N third on-board chargers with single-channel outputs; The positive charging ends of the N third on-board chargers are connected one-to-one with the positive poles of the N battery packs, the negative charging ends of the N third on-board chargers are connected one-to-one with the negative poles of the N battery packs, the positive input ends of the N third on-board chargers are all connected to the AC charging port, and the negative input ends of the N third on-board chargers are all connected to the AC charging port.

9. The adaptive power supply device according to claim 2, wherein: The control module is integrated into the controller of the electric vehicle.

10. An electric vehicle, characterized in that: The method comprises the adaptive power supply device according to any one of claims 1 to 9.

11. A method for charging the adaptive power supply device according to any one of claims 1 to 9, characterized in that: include: The charging port is switched to be connected to the target battery pack by controlling the conduction between the positive input terminal of the charging channel switching module and each of the N positive charging terminals of the charging channel switching module, and controlling the conduction between the negative input terminal of the charging channel switching module and each of the N negative charging terminals of the charging channel switching module; When the charging port is connected to the target battery pack, the target battery pack is charged, wherein the target battery pack includes at least one battery pack among the N battery packs.

12. The method according to claim 11, wherein The target battery pack includes any one of the N battery packs; Switching the charging port to connect with the target battery pack includes: By controlling the positive input terminal of the charging channel switching module to be connected to the i-th positive charging terminal of the charging channel switching module, and controlling the negative input terminal of the charging channel switching module to be connected to the i-th negative charging terminal of the charging channel switching module, the charging port is switched to be connected to the i-th battery pack among the N battery packs; The step of charging the target battery pack when the charging port is connected to the target battery pack includes: When the charging port is connected to the i-th battery pack, the i-th battery pack is charged; wherein i is a positive integer less than or equal to N.

13. The method according to claim 11, wherein The target battery group is a target combined battery group, and the target combined battery group includes at least two battery groups among the N battery groups; Switching the charging port to connect with the target battery pack includes: The charging port is switched to connect to the target assembled battery pack by controlling the positive input terminal of the charging channel switching module to connect to the kth positive charging terminal of the charging channel switching module, and controlling the negative input terminal of the charging channel switching module to connect to the k+mth negative charging terminal of the charging channel switching module; wherein k is a positive integer less than N, and m is a positive integer; The step of charging the target battery pack when the charging port is connected to the target battery pack includes: When the charging port is connected to the target assembled battery pack, the target assembled battery pack is charged; wherein the target assembled battery pack includes the kth battery pack to the k+mth battery pack connected in series in N battery packs.

14. The method according to claim 11, wherein When the charging voltage is a DC voltage and the charging voltage is greater than or equal to a first threshold, the method further includes: Determine a first target battery group and a fourth target battery group from the N battery groups; the first target battery group is the battery group with the lowest remaining power among the N battery groups; the fourth target battery group is the battery group with the highest remaining power among the N battery groups; determining whether a difference between the remaining power of the first target battery pack and the fourth target battery pack is less than a second threshold; When the difference between the remaining power of the first target battery group and the fourth target battery group is less than a second threshold, the following steps are performed: When the charging port is switched to be connected to all the N battery packs, charging the N battery packs simultaneously until the remaining power of the fourth target battery pack reaches a third threshold; When the charging port is switched to connect to a fifth target battery pack, charging the fifth target battery pack until the remaining power of each of the N battery packs reaches a third threshold; the fifth target battery pack is each of the N battery packs except the fourth target battery pack; Alternatively, when the difference between the remaining power of the first target battery group and the fourth target battery group is greater than or equal to the second threshold, the following steps are performed: When the charging port is switched to be connected to the fifth target battery pack, the fifth target battery pack is charged based on the remaining power of the fourth target battery pack until the remaining power of each battery pack in the N battery packs is equal; When the charging port is switched to be connected to all the N battery packs, the N battery packs are charged simultaneously until the remaining power of each of the N battery packs reaches a third threshold.

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