Charging device, charging control method, electric energy management system and storage medium

Abstract

The embodiments of the present application provide a charging device, a charging control method, an electric energy management system, and a storage medium, which include a charging circuit including a constant voltage control circuit, an output port, and an input port, and an energy absorption circuit connected in parallel to the charging circuit and absorbing a negative pulse current, wherein the constant voltage control circuit accesses high-voltage AC power through the input port and is connected to a battery through the output port, converts the high-voltage AC power into low-voltage DC power, and charges the battery with a positive pulse current during a first period and a negative pulse current during a second period.

Description

[Technical field]

[0001] This application claims priority to Chinese patent application No. 202111198511.5, entitled “Charging Apparatus, Charging Control Method, Electrical Energy Management System, and Storage Medium,” filed on October 14, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of battery technology, and in particular to a charging device, a charging control method, an electric energy management system, and a storage medium. [Background technology]

[0003] In recent years, new energy vehicles have made considerable developments worldwide due to their advantages of high energy conversion rate, comfortable driving experience, and zero greenhouse gas emissions. An important criterion for measuring the performance of new energy vehicles is the charging time of rechargeable batteries, and a shorter charging time can greatly improve the use experience of new energy vehicles.

[0004] Currently, the charging technology used for new energy vehicles generally uses charging stations to quickly charge new energy vehicles, and most of the related technologies for quickly charging batteries using charging stations include a bidirectional pulse charging method, but the charging and discharging capacity of this method is limited and ultra-fast charging cannot be realized. Summary of the Invention

[0005] The objective of the embodiments of the present application is to provide a charging device, a charging control method, an electric energy management system, and a storage medium, and to provide a bidirectional pulse charging method that can realize ultra-fast charging.

[0006] In a first aspect, an embodiment of the present application provides a charging circuit including a constant voltage control circuit, an output port and an input port.

[0007] The constant voltage control circuit accesses high voltage AC power via the input port and is connected to the battery via the output port, converts the high voltage AC power into low voltage DC power, and charges the battery with a positive pulse current during a first period and charges the battery with a negative pulse current during a second period.

[0008] The energy absorbing circuit is connected in parallel with the charging circuit to absorb the negative pulse current.

[0009] In this way, when the battery is charged with a negative pulse current, the reverse current of the negative pulse charging of the battery is absorbed and is not absorbed by the power grid, thereby reducing the impact on the charge and discharge capacity of the battery, thereby realizing ultra-fast charging based on bidirectional pulse charging technology.

[0010] In an alternative embodiment, the energy absorbing circuit is further disconnected when the constant voltage control circuit outputs a positive pulse current, thus ensuring stable battery charging and avoiding unnecessary consumption.

[0011] In another alternative embodiment, the energy absorbing circuit comprises: a dissipative device having a first terminal connected to the first terminal of the charging circuit; A first switch is provided, the first switch being connected to a second terminal of the dissipative device and a second terminal of the charging circuit.

[0012] Therefore, a selectable circuit structure of the energy absorbing circuit is provided, and the energy absorbing circuit is flexibly used.

[0013] In a further alternative embodiment, the energy absorbing circuit comprises: The switch further includes a second switch having a first terminal connected to the first terminal of the dissipative device and a second terminal connected to the first terminal of the charging circuit.

[0014] Therefore, a switch device is installed between both the two connection terminals of the dissipation device and the charging circuit, which can prevent the switch from being damaged, ensure that the dissipation device is in an open-circuit state when the battery is charged in the positive direction, improve the stability of battery charging, and reduce unnecessary energy consumption of the charging device.

[0015] In a further alternative embodiment, the constant voltage control circuit comprises: An AC-DC module connected to the input port; The power supply includes an AC-DC module and a DC-DC module connected to the output port.

[0016] Therefore, it can realize the voltage conversion and further provide electrical safety isolation between the battery and the high voltage side, which is helpful to supply stable power to the battery.

[0017] In a further alternative embodiment, an energy absorbing circuit is connected between the input port and the AC-DC module.

[0018] Alternatively, the energy absorbing circuit is connected between the AC-DC module and the DC-DC module.

[0019] Alternatively, the energy absorbing circuit is connected between the DC-DC module and the output port.

[0020] In a second aspect, an embodiment of the present application provides a charging control method applied to an electric energy management system EMS connected to a charging device, the charging device being configured as the charging device according to the first aspect, the charging device being further connected to a battery, the charging control method comprising: controlling a charger to charge the battery with a positive pulsed current during a first time period; Controlling the charging device to charge the battery with a negative pulse current during a second period of time, and controlling the energy absorption circuit to absorb the negative pulse current.

[0021] In this way, when the battery is charged with a negative pulse current, the reverse current of the negative pulse charging of the battery is absorbed and is not absorbed by the power grid, thereby reducing the impact on the charge and discharge capacity of the battery, thereby realizing ultra-fast charging based on bidirectional pulse charging technology.

[0022] In an alternative embodiment, after controlling the energy absorbing circuit to absorb the negative pulse current, further Obtaining the number of charging times of the negative pulse current of the charging device; controlling the charging device to unidirectionally charge the battery with a positive pulse current when the number of times reaches a threshold; When the number of times has not reached the threshold, the method further includes performing the step of controlling the charging device to charge the battery with a positive pulsed current for a first period of time.

[0023] Therefore, it is helpful to realize a flexible combination of unidirectional charging (i.e., charging the battery with a continuous positive pulse current) and bidirectional pulse charging schemes.

[0024] In another alternative embodiment, before controlling the charging device to charge the battery with a positive pulsed current for the first time period, the method further comprises: It is connected to a battery; controlling the charging device to unidirectionally charge the battery with a positive pulse current when the battery does not support a negative pulse charging policy; When the battery supports a negative pulse charging policy, the method further includes performing the step of controlling the charging device to charge the battery with a positive pulse current during a first time period.

[0025] Therefore, the battery can be charged with a corresponding policy according to the supportable charging policy, and accurate charging of the battery can be realized.

[0026] In a third aspect, an embodiment of the present application provides an electrical energy management system comprising a processor, a storage and a program or command stored in the storage and executable by the processor, the program or command implementing the steps of the method according to the second aspect when executed by the processor.

[0027] In a fourth aspect, embodiments of the present application provide a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implements the steps of the method according to the second aspect.

[0028] In an embodiment of the present application, an energy absorption circuit is connected in parallel to the charging circuit of the charging device, and a constant voltage control circuit in the charging circuit charges the battery with a positive pulse current value in a first period and charges the battery with a negative pulse current value in a second period, and at this time, the negative pulse current is absorbed by the energy absorption circuit. In this way, when the battery is charged with a negative pulse current, the reverse current of the negative pulse charging of the battery is absorbed, and the reverse current is not absorbed by the power grid, so that the impact on the charge and discharge capacity of the battery can be reduced, and ultra-fast charging based on bidirectional pulse charging technology can be realized. [Brief description of the drawings]

[0029] In order to more clearly describe the technical solutions of the embodiments of the present application, the following briefly describes the drawings that need to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on the attached drawings without requiring creative efforts. [Figure 1] FIG. 2 is a timing diagram of bidirectional pulse charging in an embodiment of the present application. [Diagram 2] FIG. 2 is a structural block diagram of a charging device according to an embodiment of the present application. [Diagram 3] FIG. 2 is another structural block diagram of a charging device according to an embodiment of the present application. [Figure 4] FIG. 2 is a diagram showing an electric circuit configuration of a charging device according to an embodiment of the present application. [Diagram 5] FIG. 4 is another electrical circuit diagram of the charging device according to the embodiment of the present application. [Figure 6] 2 is a flowchart of a charging control method provided by an embodiment of the present application. [Figure 7] 4 is another flowchart of a charging control method provided by an embodiment of the present application. [Figure 8] 4 is a further flowchart of a charging control method provided by an embodiment of the present application. [Figure 9] FIG. 1 is a hardware configuration diagram of an electronic device provided by an embodiment of the present application.

[0030] In the drawings, the drawings are not drawn to scale. [Explanation of symbols]

[0031] 10 Charging device 11 Charging circuit 12 Energy Absorption Circuit 111 Input port 112 Constant voltage control circuit 113 Output Port 1121 AC-DC Module 1122 DC-DC Module S1 First switch R Dissipative Device S2 Second switch 20 batteries. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] The following provides a more detailed description of the embodiments of the present application in conjunction with the drawings and examples. The detailed description of the following embodiments and the drawings are used to illustratively explain the principles of the present application, but cannot limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0033] It should be noted that in the description of this application, unless otherwise specified, the meaning of "plurality" refers to two or more, and the directions or positional relationships indicated by the terms "up", "down", "left", "right", "inside", "outside", etc. are intended to facilitate and simplify the description of this application only, and do not indicate or imply that the devices or elements shown have a particular orientation or must be constructed or operated in a particular orientation, and should not be understood as limiting this application. In addition, the terms "first", "second", "third", etc. are used merely for the purpose of explanation and cannot be understood as indicating or implying a relative importance. "Vertical" is not vertical in the strict sense, but has a margin of error. "Parallel" is not parallel in the strict sense, but has a margin of error.

[0034] The directional terms used in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. It should be explained that in the description of the present application, unless otherwise clearly specified and limited, the terms "attached", "connected", and "continuous" should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, or integrally connected, and may be directly connected or indirectly connected through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0035] In the new energy field, the power battery can be used as the main power source of the electric consumer (such as a vehicle, ship, or spacecraft), while the energy storage battery can be used as the charging source of the electric consumer, and the importance of both goes without saying. Without being limited thereto, for example, in some application scenarios, the power battery can be the battery of the electric consumer, and the energy storage battery can be the battery of the charging device. For ease of explanation, hereinafter, both the power battery and the energy storage battery are referred to as batteries.

[0036] Currently, most of the batteries on the market are rechargeable storage batteries, and the most common are lithium batteries, such as lithium ion batteries or lithium ion polymer batteries. In the charging process, batteries are generally charged continuously, but continuous charging of the battery can cause phenomena such as lithium precipitation and heat generation in the battery. Phenomena such as lithium precipitation and heat generation not only reduce the battery performance and significantly shorten the cycle life, but also limit the fast charging capacity of the battery and can cause fatal consequences such as combustion and explosion, and can cause serious safety issues.

[0037] For this purpose, a bidirectional pulse charging method has emerged. Refer to FIG. 1. When charging a battery, the battery is discharged intermittently with pulses. Alternatively, the battery is charged with a negative pulse current. Theoretically, when charging a battery with a positive pulse current, the polarization voltage generated in the battery will interfere with its own charging. When charging is stopped, the resistance polarization disappears, and the concentration polarization and electrochemical polarization also gradually weaken. If a discharge channel is provided for the battery to output a reverse pulse current, the electrochemical polarization disappears quickly, and at the same time, the temperature inside the battery is also reduced by discharging.

[0038] Therefore, by setting up a bidirectional pulse charging method, during the battery charging process, the output of a positive pulse current to the battery can be temporarily stopped at an appropriate time and a negative pulse current can be appropriately applied, thereby quickly and effectively removing each polarization voltage, thereby improving the charging speed and reducing phenomena such as lithium precipitation and heat generation.

[0039] However, the inventors of the present application have found that when using the bidirectional pulse charging method to charge a battery, for example, in one application scenario, the battery is installed in an electric consumer device such as an automobile, and when the battery in the automobile is charged by a charging station, the battery outputs a negative pulse current, which is eventually absorbed by the power grid through the charging device. When the energy generated by the negative pulse current exceeds the allowable range of the power grid, grid-connected discharge cannot be performed. Therefore, the charging and discharging capacity of the bidirectional pulse charging technology is limited, and the battery cannot be ultra-fast charged.

[0040] In order to solve the above technical problems, the present application provides a charging device, a charging control method, an electric energy management system, and a storage medium. A charging device is provided with a charging circuit capable of converting high-voltage AC power into low-voltage DC power, and a battery is charged with a positive pulse current in a first period, and a battery is charged with a negative pulse current in a second period, thereby realizing bidirectional pulse charging of the battery. An energy absorption circuit is further provided in parallel with the charging circuit, and the energy absorption circuit can absorb the reverse current of the negative pulse charging of the battery when the constant voltage control circuit charges the battery with a negative pulse current, and the reverse current is not absorbed by the power grid, so that the situation of being unable to perform grid-connected discharge is not generated, that is, the charging and discharging capacity of the battery is not affected. Therefore, an ultra-fast charging based on bidirectional pulse charging technology can be realized, and the risk of lithium precipitation of the battery caused by continuously charging the battery with a large current can be eliminated.

[0041] It should be explained that the charging device mentioned above can charge battery-powered electric consumption devices, where the electric devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, electric vehicles, electric automobiles, ships, spacecraft, etc. The charging device may be a charging station, a charging gun, a charging cabinet, etc.

[0042] 2, in some embodiments, the charging device 10 may include a charging circuit 11 and an energy absorbing circuit 12. Here, the charging circuit 11 may include a constant voltage control circuit 112, an output port 113 and an input port 111.

[0043] Here, the constant voltage control circuit 112 may access high-voltage AC power through an input port 111, i.e., the input port 111 is a port connecting the charging device 10 to a power grid that provides high-voltage AC power. The constant voltage control circuit 112 may be connected to the battery 20 through an output port 113. Exemplarily, the output port 113 may be a plug-in charging gun that matches the charging interface of the battery 20.

[0044] The constant voltage control circuit 112 may be used to convert high-voltage AC power into low-voltage DC power, and charge the battery 20 with a positive pulse current during a first period and charge the battery 20 with a negative pulse current during a second period.

[0045] The energy absorbing circuit 12 may be connected in parallel with the charging circuit 11, and the energy absorbing circuit 12 may be used to absorb the negative pulse current.

[0046] In the embodiment of the present application, the charging circuit 11 of the charging device 10 is connected in parallel to the energy absorption circuit 12, and the constant voltage control circuit 112 in the charging circuit 11 charges the battery 20 with a positive pulse current value in a first period and charges the battery 20 with a negative pulse current value in a second period, at which time the energy absorption circuit 12 absorbs the negative pulse current. In this way, when the battery 20 is charged with a negative pulse current, the reverse current of the negative pulse charging of the battery 20 is absorbed, and the reverse current is not absorbed by the power grid, so that the impact of the charging and discharging capacity of the battery 20 can be reduced, and ultra-fast charging based on the bidirectional pulse charging technology can be realized.

[0047] Here, the charging circuit 11 is also called the basic charging main circuit, which can refer to the path through which the power grid-charging device 10-battery 20 finally forms a complete charging and discharging process in the charging device 10 after the charging device 10 is connected to the power grid and the battery 20.

[0048] Specifically, in this embodiment, the power grid can provide high-voltage AC power, and the charging device 10 can mainly process the high-voltage AC power through the constant voltage control circuit 112 in the charging circuit 11, for example, allocate the power according to the power that can be provided by the on-board power grid and the power required by the battery 20, and finally provide suitable and stable low-voltage DC power to the battery 20.

[0049] In the process of the power grid providing stable low-voltage DC power to the battery 20, the battery 20 is supplied with power according to a bidirectional pulse charging method. Referring to Figures 1 and 2 together, the constant voltage control circuit 112 charges the battery 20 alternately with positive and negative pulse currents, and the direction of the current changes periodically. That is, between two timings of charging the battery 20 with a positive pulse current, a process of charging the battery 20 with a negative pulse current is set, or a discharge phase of the battery 20 is set.

[0050] As shown in FIG. 1, in one possible example, the first period may be greater than the second period. For example, the second period is 2 seconds, and the first period when the low-voltage DC power is outputted with a positive pulse current for the first time is 5 seconds. It should be further explained that the first period and the second period when the bidirectional pulse charging is realized later may or may not be correspondingly consistent. Specifically, it is set according to actual needs. The magnitude of the positive pulse current may or may not be consistent with the magnitude of the negative pulse current.

[0051] When the charging device 10 charges the battery 20 according to the bidirectional pulse charging method, the battery 20 discharges, causing the current output from the constant voltage control circuit 112 to become a negative pulse current, and at this time the energy absorption circuit 12 connected in parallel to the charging circuit 11 performs its function to absorb the discharge energy from the battery 20.

[0052] The energy absorption circuit 12 may be a consumption unit added to the charging circuit 11, or other modules capable of realizing energy absorption, or other electrical consumption devices. The energy absorption circuit 12 can absorb energy caused by a negative pulse current, and its core absorption principle is to convert electrical energy into other energy for consumption. For example, the energy consumption can be realized by dissipation. The expression form of the other energy is not limited to thermal energy, light energy, mechanical energy, electromagnetic energy, etc., and the dissipation method may be the consumption of a single energy or a set of multiple energies. Exemplarily, the energy absorption circuit 12 may be one or more power resistors.

[0053] The energy dissipation allows the bidirectional pulse charging method to be normally performed, and prevents a reverse pulse current, such as power grid absorption, from being provided to the high-voltage side of the high-voltage AC power, without affecting the charge and discharge capacity of the battery 20. As a result, when bidirectional pulse charging is supported, ultra-fast charging can be realized, the phenomenon of lithium precipitation caused by continuous charging can be reduced, and the service life of the battery 20 can be improved.

[0054] When the constant voltage control circuit 112 charges the battery 20 with a positive pulse current, it reduces unnecessary consumption by the energy absorption circuit 12 and ensures stable charging of the battery 20, and the energy absorption circuit 12 may further be cut off when the constant voltage control circuit 112 outputs a positive pulse current.

[0055] In one possible example, the control of the switch element is set to directly absorb the negative pulse energy of the discharge when the battery 20 is discharged, and the energy absorption circuit 12 is disconnected and put into a bypass state when the battery 20 is charged with a positive pulse current, thereby ensuring stable charging of the battery 20 and avoiding unnecessary consumption.

[0056] In another optional example, in order for the constant voltage control circuit 112 to provide complete functions, referring to Fig. 2 and Fig. 3, the constant voltage control circuit 112 may include an AC-DC (Alternating Current-Direct Current) module 1121 and a DC-DC (Direct Current-Direct Current) module 1122. The AC-DC module 1121 may be connected to the input port 111. The DC-DC module 1122 may be connected to the AC-DC module 1121 and the output port 113.

[0057] Here, the AC-DC module 1121 may be an AC-DC bidirectional inverter, whereby the AC power provided by the power grid is converted to DC power via the AC-DC module 1121 to charge the battery 20 .

[0058] The DC-DC module 1122 may include one or more DC-DC units, and converts AC-DC high-voltage DC power into low-voltage DC power to charge the battery 20, thereby realizing voltage conversion and further providing electrical safety isolation between the battery 20 and the high-voltage side, and capable of stably supplying power to the battery 20.

[0059] It should be noted that when the constant voltage control circuit 112 charges the battery 20 with a positive pulse current, the high voltage AC power charges the battery 20 through the AC / DC module 1121, and when the constant voltage control circuit 112 charges the battery 20 with a negative pulse current, the AC / DC module 1121 cuts off the output, at this time the path of the negative pulse current flowing to the port 111 is cut off, that is, the power grid cannot receive the discharge current of the battery 20. The energy absorption circuit 12 is activated to absorb the negative pulse current.

[0060] According to the connection structure of the AC-DC module 1121 and the DC-DC module 1122 provided by the constant voltage control circuit 112, the connection position of the energy absorption circuit 12 can be set according to actual needs, and it is only necessary to connect it in parallel with the charging circuit 11 and realize the absorption of negative pulse current.

[0061] Exemplarily, the energy absorbing circuit 12 may be connected between the input port 111 and the AC-DC module 1121. Alternatively, the energy absorbing circuit 12 may be connected between the AC-DC module 1121 and the DC-DC module 1122. Alternatively, the energy absorbing circuit 12 may be connected between the DC-DC module 1122 and the output port 113.

[0062] It should be further noted that the DC-DC module 1122 may also be configured with a series connection switch and a parallel connection switch, thereby realizing flexible control of series and parallel connection of multiple DC-DC units, and the charging device 10 can provide multiple charging services with different voltage specifications to the battery 20 based on the adjustment of the series connection switch and the second parallel connection switch, thereby improving the service selectability of the charging device 10.

[0063] 2 and 4, Fig. 4 shows an alternative electrical circuit diagram of the charging device 10, and in particular an alternative electrical circuit diagram of the energy absorption circuit 12. In this alternative example, the energy absorption circuit 12 includes a dissipative device R and a first switch S1.

[0064] A first terminal of the dissipative device R may be connected to a first terminal of the charging circuit 11. A first switch S1 may be connected to a second terminal of the dissipative device R and a second terminal of the charging circuit 11.

[0065] Illustratively, the dissipative device R may be a resistor or multiple resistors connected in series, such as a power resistor or a high-power electrical device.

[0066] Exemplarily, the first switch S1 may be a mechanical switch, an electronic switch, or other device having a switch function. The first switch S1 may be integrated into the constant voltage control circuit 112 and controlled by a device of the constant voltage control circuit 112 that originally has a switch function.

[0067] It should be further noted that when the first switch S1 is integrated into the constant voltage control circuit 112, and when a negative pulse current is output, the function of the constant voltage control circuit 112 to convert AC power into DC power can be cut off, that is, the AC-DC module 1121 can be cut off, so as to avoid the transfer of energy from the DC side to the AC side due to reverse discharge of the battery 20, and further avoid the impact on the power grid providing high-voltage AC power.

[0068] Thereby, in this example, a selectable circuit structure of the energy absorbing circuit 12 is provided, and the energy absorbing circuit 12 is realized to be used flexibly.

[0069] 2 and 5, the energy absorption circuit 12 may include a second switch S2. A first terminal of the second switch S2 may be connected to a first terminal of the dissipative device R, and a second terminal of the second switch S2 may be connected to a first terminal of the charging circuit 11.

[0070] That is, in the energy absorption circuit 12, two switches that can be switched between states are provided, and the type of the second switch S2 may be the same or similar to the first switch S1, but the description thereof is omitted here. It should be noted that the first switch S1 and the second switch S2 are both turned on when the constant voltage control circuit 112 charges the battery 20 with a negative pulse current, that is, when the battery 20 is in a reverse discharge state, so that the dissipation device R in the energy absorption circuit 12 can directly absorb the discharged electric energy caused by reverse discharge. When the constant voltage control circuit 112 charges the battery 20 with a positive pulse current, the first switch S1 and the second switch S2 are both turned off, so that the energy absorption circuit 12 is turned off and put into a bypass state.

[0071] Therefore, by setting a switch device between both of the two connection terminals of the dissipation device R and the charging circuit 11, it is possible to prevent the switch from being damaged, ensure that the dissipation device R is in an open-circuit state during forward charging of the battery 20, improve the charging stability of the battery 20, and reduce unnecessary energy consumption of the charging device 10.

[0072] In a further optional example, since the energy absorption circuit 12 needs to realize the absorption of negative pulse current, and the charging device 10 generates a large amount of heat consumption during the charging process, a heat dissipation set unit may be set in the charging device 10. According to the actual applied power and heat dissipation environment, etc., corresponding heat dissipation measures can be taken, including but not limited to water-cooled heat dissipation, air-cooled heat dissipation, etc.

[0073] Based on the selectable structures of the charging device shown in the above-mentioned FIGS. 2 to 5, and referring to FIG. 6, in one embodiment of a charging control method provided by the present application, the charging control method includes: The electrical energy management system includes controlling the charging device to charge the battery with a positive pulsed current for a first period of time; The electrical energy management system may include S620 controlling the charging device to charge the battery with a negative pulse current during a second time period and controlling the energy absorption circuit to absorb the negative pulse current.

[0074] It should be noted that the charging device of S610 and S620 refers to the embodiment shown in Fig. 1 to Fig. 5 above. An energy management system (EMS) therein may be electrically connected to the charging device, and the charging device and the energy management system constitute a charging system. The energy management system can be used as a control processor of the charging device policy, so that the charging device can communicate with the outside through the energy management system.

[0075] In addition, to realize the control of the charging device, the electric energy management system may be installed in the charging device or may be separately installed outside the charging device. When the electric energy management system is installed in the charging device, the charging device may be installed with an auxiliary power system to provide basic electric energy for the control of the electric energy management system.

[0076] In the embodiment of the present application, the electric energy management system controls the constant voltage control circuit to charge the battery with a positive pulse current value in a first period, and controls the constant voltage control circuit to charge the battery with a negative pulse current value in a second period, and at this time, the electric energy management system also controls the energy absorption circuit to absorb the negative pulse current. In this way, when charging the battery with a negative pulse current, the reverse current of the negative pulse charging of the battery is absorbed, and the reverse current is not absorbed by the power grid, so that the impact on the charge and discharge capacity of the battery can be reduced, and ultra-fast charging based on bidirectional pulse charging technology can be realized.

[0077] Referring to FIG. 7, in another optional example of the charging control method, excluding S610 and S620, after performing S620: The electric energy management system obtains a charging frequency of a negative pulse current of a charging device (S710); The electrical energy management system judges whether the number of charging times of the negative pulse current reaches a threshold, and if so, executes S730, and if not, returns to S610 in S720; The electrical energy management system further includes S730, controlling the charging device to unidirectionally charge the battery with a positive pulse current.

[0078] It should be noted that in the process of implementing battery charging in this embodiment, the number of charging times of negative pulse current is summed up, that is, the cumulative number of reverse discharges of the battery is obtained. However, since too many reverse discharges will affect the charging effect of the battery, the bidirectional pulse charging method with a limited number of times can maximally and effectively prevent the phenomenon of lithium deposition in the battery and at the same time ensure the rapid charging of the battery.

[0079] On this basis, a threshold value is set and the number of charging times of negative pulse current is compared with the threshold value to help realize a flexible combination of unidirectional charging (i.e., continuous charging of the battery with positive pulse current) and bidirectional pulse charging methods.

[0080] Referring to FIG. 8, in a further optional example of the charging control method, excluding S610 and S620, before executing S610: an S810 having an electrical energy management system connected to a battery; S820, determining whether the battery supports a negative pulse charging policy using the electrical energy management system, and if not, executing S830, and if so, executing step S610; and controlling the charging device to unidirectionally charge the battery with a positive pulse current S830.

[0081] Here, the connection with the battery may refer to a communication connection between the electric energy management system and the battery, which may be realized before the battery is charged and after the output port in the charging device is connected to the external battery.

[0082] The electric energy management system can obtain parameter information of the battery through a communication protocol, determine a supportable charging policy for the battery based on the parameter information, and charge the battery with a corresponding policy according to the supportable charging policy, thereby achieving accurate charging of the battery.

[0083] Hereinafter, with reference to Figs. 6 to 8, a selectable charging control process of a charging system including a charging device and an electric energy management system will be described.

[0084] After the output port in the charging device is connected to the battery, the electric energy management system is communicatively connected to the battery, and the charging system can perform a charging self-diagnosis according to a standard charging and discharging protocol. After the charging self-diagnosis is passed, the electric energy management system can determine the current battery state according to the communication protocol of the battery, and can determine whether the battery supports negative pulse charging (whether the battery supports a bidirectional pulse charging method) according to the parameter information obtained by the communication protocol.

[0085] If the battery supports performing negative pulse charging, the electrical energy management system sends a charging command to each module in the constant voltage control circuit and the energy absorption circuit, and the charging command may include an amplitude value of a positive pulse current, an amplitude value of a negative pulse current, and an amplitude value of a pulse of the bidirectional pulse charging.

[0086] When the AC / DC module in the constant voltage control circuit receives a charging command from the electric energy management system, it converts the high-voltage AC voltage of the power grid into a predetermined DC voltage and positive pulse current based on the set value of the charging command and outputs it, thereby charging the external battery after voltage drop and / or electrical isolation is performed by the DC-DC module.

[0087] When both the electric energy management system and the AC / DC module confirm that the current positive charging time has reached the policy set value (for example, the first period), the electric energy management system is disconnected by the communication control AC / DC module to stop output, at this time the energy absorption circuit accesses the charging circuit, then the electric energy management system requests the DC / DC module to reverse discharge the battery according to the policy request, the constant voltage control circuit charges the battery with a negative pulse current, and the energy absorption circuit absorbs the negative pulse current.

[0088] Both the electrical energy management system and the DC / DC module jointly check whether the current reverse discharge time has reached the policy setting value (e.g., the second period), i.e., whether the reverse time requirement has been reached, and the electrical energy management system controls the disconnection of the energy absorption circuit through communication, and the AC / DC module starts up and outputs again, and continues to charge the battery according to the charging command.

[0089] When the electrical energy management system, or both the electrical energy management system and the battery, determine whether the charging count of the negative pulse current has reached a threshold, or if the battery does not support the bidirectional pulse charging method, the charging system enters a conventional unidirectional charging mode.

[0090] In addition, the electrical energy management system and the battery can monitor important parameters of the battery and the entire charging system in real time. Exemplarily, the important parameters may include at least one of the remaining battery capacity, the voltage of the battery core, the temperature, and the component status in the charging device. If a fault occurs, charging is terminated.

[0091] 9 shows a hardware configuration diagram of an electric energy management system provided by an embodiment of the present application, where the electric energy management system may include a processor 901 and a storage 902 in which computer program commands are stored.

[0092] Specifically, the processor 901 may include a central processing unit (CPU) or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0093] Storage 902 may include mass storage for data and commands. For example, storage 901 may include a hard disk drive (HDD), a floppy disk drive, flash storage, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more thereof. Where appropriate, storage 902 may include removable or non-removable (or fixed) media. Where appropriate, storage 902 may be located internal or external to the unified gateway disaster recovery appliance. In certain embodiments, storage 902 is non-volatile solid-state memory.

[0094] Storage may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical / tangible memory storage devices. Thus, generally, storage includes a tangible (non-transitory) computer-readable storage medium (e.g., a storage device) that is coded with one or more software programs that include computer-executable instructions, and that when executed (e.g., on one or more processors) can operate to perform the operations described in the methods according to one aspect of the present disclosure.

[0095] The processor 901 reads and executes computer program commands stored in the storage 902 to realize any of the charging control methods in the above embodiments.

[0096] In one example, the electrical energy management system may include a communication interface 903 and a bus 910. As shown in FIG. 9, a processor 901, a storage 902, and a communication interface 903 are connected via the bus 910 and complete communication between them.

[0097] The communication interface 903 is mainly used to realize communication between each module, apparatus, unit and / or device in the embodiment of the present application.

[0098] The bus 910 may include hardware, software, or both, and may couple together the components of the electrical energy management system. For example, and without limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics-only bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a low-pin-count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a PCI bus, a PCI Express (PCI-X) bus, a Serial ATA (SATA) bus, a Video Electronics Standards Association local (VLB) bus, or any other suitable bus, or any combination of two or more thereof. The bus 910 may include one or more buses. The bus 910 may include one or more buses. Although embodiments herein are illustrated and described with particular buses, the present application contemplates any suitable bus or interconnect.

[0099] The electric energy management system can realize the charge control method described in conjunction with Figs. 6 to 8 based on the charge control method.

[0100] In addition, in accordance with the charging control method in the above embodiment, the embodiment of the present application can be realized by providing a computer storage medium. The computer storage medium stores computer program commands, which, when executed by a processor, realize any of the charging control methods in the above embodiment. Examples of the computer storage medium include tangible (non-transitory) computer-readable storage media, such as electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hardware, etc.

[0101] Although the present application has been described with reference to the preferred embodiments, various modifications can be made and parts therein can be replaced with equivalents without departing from the scope of the present application. In particular, the respective technical features described in each embodiment can be combined in any manner unless there is a structural conflict. The present application is not limited to the specific embodiments disclosed in this specification, but includes all technical solutions falling within the scope of the claims.

Claims

1. A charging circuit (11) including a constant voltage control circuit (112), an output port (113), and an input port (111); an energy absorbing circuit (12) connected in parallel to the charging circuit (11) and absorbing a negative pulse current; Equipped with The constant voltage control circuit (112) accesses high voltage AC power through the input port (111) and is connected to a battery (20) through the output port (113) to convert the high voltage AC power into low voltage DC power and charge the battery (20) with a positive pulse current during a first period and charge the battery (20) with a negative pulse current during a second period; When charging the battery (20) with the negative pulse current during the second period, the energy absorption circuit (12) can absorb a reverse current of the negative pulse charging of the battery; The constant voltage control circuit (112) an AC-DC module (1121) connected to the input port (111); a DC-DC module (1122) connected to the AC-DC module (1121) and the output port (113); The energy absorption circuit (12) is connected between the input port (111) and the AC-DC module (1121); Alternatively, the energy absorption circuit (12) is connected between the AC-DC module (1121) and the DC-DC module (1122), Alternatively, the energy absorption circuit (12) is connected between the DC-DC module (1122) and the output port (113). A charging device characterized by:

2. The energy absorbing circuit (12) is further disconnected when the constant voltage control circuit (112) outputs the positive pulse current.

2. The charging device according to claim 1 .

3. The energy absorption circuit (12) comprises: a dissipative device (R) having a first terminal connected to a first terminal of the charging circuit (11); a first switch (S1) connected to a second terminal of the dissipative device (R) and a second terminal of the charging circuit (11); 2. The charging device according to claim 1 .

4. The energy absorption circuit (12) comprises: a second switch (S2) having a first terminal connected to the first terminal of the dissipative device (R) and a second terminal connected to the first terminal of the charging circuit (11); 4. The charging device according to claim 3.

5. A charging control method for an electric energy management system EMS connected to a charging device, the charging device being configured as the charging device according to any one of claims 1 to 4, the charging device being further connected to a battery, the charging control method comprising: controlling the charging device to charge the battery with a positive pulsed current for a first period of time; controlling the charging device to charge the battery with a negative pulse current during a second time period and controlling the energy absorption circuit to absorb the negative pulse current; and performing bidirectional pulse charging by alternately charging with a positive pulse current and charging with a negative pulse current. A charging control method comprising:

6. after controlling the energy absorption circuit to absorb the negative pulse current; Obtaining the number of times of charging the negative pulse current of the charging device; controlling the charging device to charge the battery with a positive current when the number reaches a threshold; performing the bidirectional pulse charging when the number of times has not reached a threshold value.

6. The charge control method according to claim 5.

7. Prior to controlling the charging device to charge the battery with a positive pulsed current for the first time period, the method further comprises: connected to the battery; controlling the charging device to charge the battery with a positive current when the battery does not support a negative pulse charging policy; performing the bidirectional pulse charging when the battery supports a negative pulse charging policy.

6. The charge control method according to claim 5.

8. A processor, a storage device, and a program or command stored in the storage device and executable by the processor, The program or command, when executed by the processor, realizes the steps of the charging control method according to claim 5.

1. An electrical energy management system comprising:

9. A program or command that, when executed by a processor, realizes the steps of the charging control method according to claim 5, is stored. A readable storage medium.

Images