CN110277807B - Charging current control method and apparatus, battery management system, vehicle, device, and computer-readable storage medium - Google Patents
Charging current control method and apparatus, battery management system, vehicle, device, and computer-readable storage medium Download PDFInfo
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Abstract
The invention provides a charging current control method and device, a battery management system, a vehicle, equipment and a computer readable storage medium, wherein the charging current control method comprises the following steps: in the process of charging the battery, determining a first charging current according to the allowable charging current of the battery and the opening and closing state of a discharging device in a circuit where the battery is located; in the process of charging the battery through the first charging current, acquiring a battery loop current in a circuit where the battery is located; calculating a difference current between the battery loop current and the battery allowable charging current; and adjusting the first charging current to be a second charging current according to the difference current. By the technical scheme, the charging current can be effectively controlled, and the influence of the improper charging current on the performance of the battery is reduced.
Description
[ technical field ] A
The present invention relates to the field of battery technologies, and in particular, to a charging current control method and apparatus, a battery management system, a vehicle, a device, and a computer-readable storage medium.
[ background of the invention ]
At present, the charging performance of a battery in a low-temperature environment is poor, the allowable charging current is low, and if the battery is charged according to the charging current exceeding the allowable charging current of the battery, lithium precipitation of the battery is easily caused, and the normal performance of the battery is influenced. However, the current actually output by the existing charging device cannot be accurately controlled, which causes the lithium precipitation of the battery in a low-temperature environment due to the fact that the actual charging current is higher than the allowable charging current, and affects the performance of the battery.
Moreover, in the process of charging the battery, a load in a circuit where the battery is located is in a working state, which may cause the battery to be discharged in the charging process, and if the discharging current is greater than the charging current of the battery, the battery may be over-discharged, which may affect the normal performance of the battery. Further, the load in the circuit can be turned on or off at any time, the discharging current fluctuates along with the increase and decrease of the load, and since the current output by the charging device is occupied by the load and the current occupied by the load, i.e., the discharging current, also fluctuates, the actual charging current of the battery fluctuates along with the fluctuation, the charging condition of the battery is affected, and the performance of the battery is affected due to improper charging.
Therefore, how to protect the battery performance from being damaged in the battery charging process becomes a technical problem to be solved urgently at present.
[ summary of the invention ]
The embodiment of the invention provides a charging current control method and device, a battery management system, a vehicle, equipment and a computer readable storage medium, aiming at solving the technical problem that the battery performance is easy to be damaged in the charging process of a battery in the related technology, effectively controlling the charging current and reducing the influence of improper charging current on the battery performance.
In a first aspect, an embodiment of the present invention provides a charging current control method, including: in the process of charging the battery, determining a first charging current according to the allowable charging current of the battery and the opening and closing state of a discharging device in a circuit where the battery is located; in the process of charging the battery through the first charging current, acquiring a battery loop current in a circuit where the battery is located; calculating a difference current between the battery loop current and the battery allowable charging current; and adjusting the first charging current to be a second charging current according to the difference current.
In the above embodiment of the present invention, optionally, the step of determining the first charging current according to the allowable charging current of the battery and the on-off state of the discharging device in the circuit where the battery is located includes: detecting an open-closed state of a discharge device in the circuit; when the detection result shows that the discharge devices in the circuit are all in the open circuit state, determining the allowable charging current of the battery as the first charging current; when the detection result is that the plurality of discharge devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharge devices and the allowable charging current of the battery as the first charging current.
In the above embodiment of the present invention, optionally, before the step of adjusting the first charging current to the second charging current according to the difference current, the method further includes: detecting an open-closed state of a discharge device in the circuit; the step of adjusting the first charging current to a second charging current according to the difference current comprises: when the detection result is that the discharge devices in the circuit are all in an open circuit state, setting the sum of the first charging current and the difference current as the second charging current; and when the detection result is that a plurality of discharge devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharge devices, the first charging current and the difference current as the second charging current.
In the above embodiments of the present invention, optionally, the consumption current of the plurality of discharge devices is a rated current or a real-time operating current of the plurality of discharge devices.
In the above embodiment of the present invention, optionally, the discharge device is a cell heater.
In the above embodiment of the present invention, optionally, the discharge device includes a cell heater and a load.
In the above embodiment of the present invention, optionally, the step of obtaining the battery loop current in the circuit where the battery is located includes: and acquiring the battery loop current in the circuit where the battery is positioned at preset time intervals.
In a second aspect, an embodiment of the present invention provides a charging current control apparatus, including: the charging current determining unit is used for determining a first charging current according to the allowable charging current of the battery and the on-off state of a discharging device in a circuit where the battery is located in the charging process of the battery; the battery loop current acquisition unit is used for acquiring the battery loop current in a circuit where the battery is located in the process of charging the battery through the first charging current; a differential current calculation unit that calculates a differential current between the battery loop current and the battery allowable charging current; and the charging current adjusting unit adjusts the first charging current into a second charging current according to the difference current.
In the above embodiment of the present invention, optionally, the charging current determining unit is configured to: detecting the open-close state of the discharge devices in the circuit, wherein when the detection result shows that the discharge devices in the circuit are all in the open-circuit state, the allowable charging current of the battery is determined as the first charging current, and when the detection result shows that the discharge devices in the circuit are in the on-circuit state, the sum of the consumption current of the discharge devices and the allowable charging current of the battery is determined as the first charging current.
In the above embodiment of the present invention, optionally, the method further includes: a detection unit for detecting an open/close state of a discharge device in the circuit before the charging current adjustment unit adjusts the first charging current to a second charging current; the charging current adjustment unit is configured to: when the detection result is that the discharge devices in the circuit are all in an open circuit state, setting the sum of the first charging current and the difference current as the second charging current; and when the detection result is that a plurality of discharge devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharge devices, the first charging current and the difference current as the second charging current.
In the above embodiments of the present invention, optionally, the consumption current of the plurality of discharge devices is a rated current or a real-time operating current of the plurality of discharge devices.
In the above embodiment of the present invention, optionally, the discharge device is a cell heater.
In the above embodiment of the present invention, optionally, the discharge device includes a cell heater and a load.
In the above embodiment of the present invention, optionally, the battery loop current obtaining unit is configured to: and acquiring the battery loop current in the circuit where the battery is positioned at preset time intervals.
In a third aspect, an embodiment of the present invention provides a battery management system, including the charging current control device according to any one of the second aspects.
In a fourth aspect, an embodiment of the present invention provides a vehicle including the charging current control apparatus according to any one of the second aspects.
In a fifth aspect, an embodiment of the present invention provides an apparatus, including: a rechargeable battery; the charging current control device according to any one of the second aspect described above, for controlling a charging current to the rechargeable battery.
In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, which is characterized by including computer instructions for executing the method flow described in any one of the foregoing first aspects.
Aiming at the technical problem that the battery performance is easy to be damaged in the battery charging process in the related technology, the invention provides a technical scheme for regulating and controlling the charging current in real time.
Specifically, in the battery charging process, firstly, the allowable battery charging current required by charging the battery is obtained, where the allowable battery charging current is the charging current required by the battery, and the obtaining manner includes, but is not limited to, obtaining the allowable battery charging current of the battery cell at this time according to a table look-up of the battery cell state. In order to ensure that the battery is normally charged, the output current of the charging device can supply the charging current required by the battery, and if a discharging device is working, the output current of the charging device also has the ability of supplying the discharging device in the circuit where the battery is located to normally work, so the on-off state of the discharging device in the circuit where the battery is located needs to be determined, if the discharging device is working, the output current of the charging device is the first charging current, and the sum of the consumption current of the discharging device and the allowable charging current of the battery is required to be the first charging current, and if no discharging device is working, the first charging current is the allowable charging current of the battery.
After the first charging current is determined, charging can be performed through the first charging current, at this time, a battery loop current in a circuit where the battery is located can be obtained, the battery loop current is an actual charging current of the battery, and if there is a difference between the actual charging current of the battery and a battery allowable charging current of the battery, it is indicated that a real-time requirement of the battery does not conform to an initial requirement of the battery any more, and at this time, situations such as a change in charging capability of the charging device, a change in the number of discharging devices in the circuit where the battery is located, and the like are likely to occur. Therefore, the difference current obtained by subtracting the allowable charging current of the battery from the battery loop current is the variation value of the charging current provided to the battery by the charging device.
Finally, the first charging current is adjusted according to the change value, so that the first charging current is changed to a second charging current which can continuously provide the battery with the battery allowable charging current.
Through the technical scheme, in the charging process, the charging current requested by the battery management system to the charging equipment can be dynamically adjusted by monitoring the current of the battery loop, so that the balance among the output current of the charging equipment, the consumption current of the discharging device and the charging current required by the battery is ensured. According to the scheme, the consumed current of the discharge device does not need to be monitored independently, the cost is saved, the charging current can be effectively controlled, and the influence of the improper charging current on the performance of the battery is reduced.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 illustrates a flow diagram of a charge current control method of one embodiment of the present invention;
FIG. 2 shows a flow chart of a charge current control method of another embodiment of the invention;
FIG. 3 shows a schematic diagram of the charge current control circuit of FIG. 2;
fig. 4 shows a block diagram of a charge current control device of an embodiment of the present invention;
FIG. 5 shows a block diagram of a battery management system of one embodiment of the present invention;
FIG. 6 shows a block diagram of a vehicle of an embodiment of the invention;
FIG. 7 shows a block diagram of an apparatus of an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Fig. 1 shows a flow chart of a charging current control method of an embodiment of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a charging current control method, including:
In the process of charging the battery, firstly, the allowable charging current of the battery required by charging the battery is obtained, and the allowable charging current of the battery is the charging current required by the battery, and the obtaining manner includes, but is not limited to, obtaining the allowable charging current of the battery at the moment according to the table look-up of the battery cell state.
And 104, acquiring a battery loop current in a circuit where the battery is located in the process of charging the battery through the first charging current.
After the first charging current is determined, charging can be performed through the first charging current, and at this time, a battery loop current in a circuit where the battery is located can be obtained, where the battery loop current is an actual charging current of the battery.
If there is a difference between the actual charging current of the battery and the allowable charging current of the battery, it indicates that the real-time requirement of the battery no longer conforms to the initial requirement of the battery, and at this time, situations such as a change in the charging capability of the charging device, a change in the number of discharging devices in the circuit where the battery is located, and the like are likely to occur. Therefore, the difference current obtained by subtracting the allowable charging current of the battery from the battery loop current is the variation value of the charging current provided to the battery by the charging device.
And step 108, adjusting the first charging current to a second charging current according to the difference current.
Finally, the first charging current is adjusted according to the change value, so that the first charging current is changed to a second charging current which can continuously provide the battery with the battery allowable charging current.
Through the technical scheme, in the charging process, the charging current requested by the battery management system to the charging equipment can be dynamically adjusted by monitoring the current of the battery loop, so that the balance among the output current of the charging equipment, the consumption current of the discharging device and the charging current required by the battery is ensured. According to the scheme, the consumed current of the discharge device does not need to be monitored independently, the cost is saved, the charging current can be effectively controlled, and the influence of the improper charging current on the performance of the battery is reduced.
In the foregoing embodiment of the present invention, optionally, step 102 includes: detecting an open-closed state of a discharge device in the circuit; when the detection result shows that the discharge devices in the circuit are all in an open circuit state, determining the allowable charging current of the battery as the first charging current; when the detection result is that a plurality of discharging devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharging devices and the allowable charging current of the battery as the first charging current.
In order to ensure that the battery is normally charged, the output current of the charging device can supply the charging current required by the battery, and if a discharging device is working, the output current of the charging device also has the ability of supplying the discharging device in the circuit where the battery is located to normally work, so the on-off state of the discharging device in the circuit where the battery is located needs to be determined, if the discharging device is working, the output current of the charging device is the first charging current, and the sum of the consumption current of the discharging device and the allowable charging current of the battery is required to be the first charging current, and if no discharging device is working, the first charging current is the allowable charging current of the battery.
The number of the discharge devices in the circuit is one or more, and the discharge devices can be turned on or off automatically or manually according to the actual needs of users, that is, the total consumption current required by the discharge devices is variable, so that the real-time adjustment of the charging current is particularly necessary.
In the above embodiment of the present invention, optionally, before step 108, further includes: detecting an open-closed state of a discharge device in the circuit; step 108 comprises: when the detection result is that the discharge devices in the circuit are all in an open circuit state, setting the sum of the first charging current and the difference current as the second charging current; and when the detection result is that a plurality of discharge devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharge devices, the first charging current and the difference current as the second charging current.
Since the discharge device can be turned on or off automatically or manually according to the actual requirements of the user, that is, during the charging process, the total consumption current required by the discharge device is variable, and the proportion of the occupied first charging current is changed, the actual charging current of the battery is also changed, so that the battery is overcharged or overdischarged. Therefore, before the first charging current is adjusted according to the differential current, whether a discharging device works or not needs to be judged, if the discharging device works, the output current of the charging device also needs to be capable of supplying the discharging device in the circuit where the battery is located to work normally, therefore, the on-off state of the discharging device in the circuit where the battery is located needs to be determined, if the discharging device works, the output current of the charging device is the sum of the consumption current of the discharging device and the first charging current and the differential current, and if no discharging device works, the sum of the first charging current and the differential current is the allowable charging current of the battery.
In the above embodiments of the present invention, optionally, the consumption current of the plurality of discharge devices is a rated current or a real-time operating current of the plurality of discharge devices.
Therefore, the rated current of the discharge device is directly used as the consumed current of the discharge device, the process of detecting the consumed current of the discharge device can be omitted, the working efficiency of the battery management system is improved, and when the consumed current of the discharge devices is the real-time working current of the discharge devices, the real-time working current of the discharge devices can be detected, so that the calculation accuracy of the consumed current of the discharge devices is improved, and the accuracy of charging current control is further improved.
In the above embodiment of the present invention, optionally, the discharge device is a cell heater.
The cell heater can be used for heating the cell of the battery in a low-temperature environment so as to improve the charging performance of the battery and avoid the problem of lithium precipitation caused by the reduction of the charging performance caused by low temperature. In the working process of the cell heater, the output current of the charging equipment is the sum of the consumption current of the cell heater and the charging current required by the battery, if the output current of the charging equipment is higher than the sum, the battery overshoot is easily caused, and if the output current of the charging equipment is lower than the sum, the battery over-discharge is easily caused. Therefore, in order to heat the cells using the cell heater while protecting the performance of the battery from being good, the above-described charging current control method may be implemented.
In the above embodiment of the present invention, optionally, the discharge device includes a cell heater and a load.
The discharge device includes, but is not limited to, a cell heater and a load, and the load refers to a carrier for consuming current in a circuit in which the battery is located, and the load includes, but is not limited to, a vehicle load.
In the above embodiment of the present invention, optionally, the step of obtaining the battery loop current in the circuit where the battery is located includes: and acquiring the current of a battery loop in a circuit where the battery is positioned at intervals of preset time. That is to say, the battery loop current in the circuit where the battery is located needs to be detected and obtained continuously and circularly, and as long as the battery loop current is different from the charging current required by the battery, the output current of the charging device needs to be adjusted, so that the accuracy of the charging current control is further improved.
Fig. 2 shows a flow chart of a charging current control method according to another embodiment of the present invention, and fig. 3 shows a schematic diagram of the charging current control circuit in fig. 2.
As shown in fig. 2, a charging current control method according to another embodiment of the present invention includes:
in step 202, charging is started. The current trend during charging is shown in fig. 3, where the discharging device includes a vehicle load and a heater (the heaters described in this embodiment are all electric core heaters), I1 is a consumed current of the vehicle load (always greater than or equal to 0A), I2 is an output current of the charging device (always greater than or equal to 0A), I3 is a consumed current of the heater (always greater than or equal to 0A), I4 is a battery loop current (when I > 0A, the battery is in a discharging state, and when I < 0A, the battery is in a charging state), and according to kirchhoff's first law, the sum of all currents entering a node is equal to the sum of all currents leaving the node, so the following formula holds: I2-I1-I3= I4.
The load characteristics of the whole vehicle load and the heater cannot maintain a constant current state, so that I1 and I3 fluctuate in the charging process, and the output current of the charging equipment has deviation in the charging process due to the output error and ripple of the power module. Therefore, the I4 is in a fluctuation state, namely the I4 is deviated from the battery allowable charging current of the battery core, and the battery allowable charging current is obtained by the battery management system through monitoring the state of the battery core and is always larger than or equal to 0A.
In addition, K1, K2, and K3 in fig. 3 are switches of the entire vehicle load, the charging device, and the heater, respectively, and control on/off of the corresponding object.
And step 204, judging whether the discharge device is started, if so, entering step 206, and otherwise, entering step 208.
In step 208, a first charging current is calculated, where the first charging current I1= the allowable charging current of the battery, and the process proceeds to step 210.
In step 210, the battery loop current I4 is monitored.
And step 214, judging whether the discharge device is started, and if so, entering step 216, otherwise, entering step 218.
In step 216, a second charging current is calculated, where the second charging current I1' = battery allowable charging current + rated current of the discharging device + differential current.
In step 218, a second charging current is calculated, I1' = allowed charging current + differential current of the battery.
And step 220, judging whether the charging is finished, if so, finishing the process, otherwise, returning to the step 204.
Therefore, under the conditions of low-temperature charging and heater opening, the output current of the charging equipment is adjusted by monitoring the current of the battery loop, namely the current of the battery core loop, so that the phenomenon that the battery core is charged at low temperature to cause lithium precipitation or discharge in the charging process to cause over-discharge is avoided. Of course, the scheme can be applied to low-temperature environment and normal temperature.
Fig. 4 shows a block diagram of a charge current control device of an embodiment of the present invention.
As shown in fig. 4, a charging current control apparatus 400 according to an embodiment of the present invention includes: a charging current determining unit 402, which determines a first charging current according to the allowable charging current of the battery and the on-off state of a discharging device in a circuit where the battery is located during the charging process of the battery; a battery loop current obtaining unit 404, configured to obtain a battery loop current in a circuit where the battery is located during a process of charging the battery by using the first charging current; a differential current calculation unit 406 that calculates a differential current between the battery loop current and the battery allowable charging current; the charging current adjusting unit 408 adjusts the first charging current to a second charging current according to the difference current.
The charging current control apparatus 400 uses the scheme described in any one of the embodiments shown in fig. 1 and fig. 2, and therefore, all the technical effects described above are achieved, and are not described again. The charging current control device 400 also has the following technical features:
in the above embodiment of the present invention, optionally, the charging current determining unit 402 is configured to: detecting the open-close state of the discharge devices in the circuit, wherein when the detection result shows that the discharge devices in the circuit are all in the open-circuit state, the allowable charging current of the battery is determined as the first charging current, and when the detection result shows that the discharge devices in the circuit are in the on-circuit state, the sum of the consumption current of the discharge devices and the allowable charging current of the battery is determined as the first charging current.
In the above embodiment of the present invention, optionally, the method further includes: a detection unit for detecting an open/close state of a discharge device in the circuit before the charging current adjustment unit 408 adjusts the first charging current to a second charging current; the charging current adjustment unit 408 is configured to: setting the sum of the first charging current and the difference current as the second charging current when the detection result shows that the discharge devices in the circuit are all in the open circuit state; and when the detection result is that a plurality of discharge devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharge devices, the first charging current and the difference current as the second charging current.
In the above embodiments of the present invention, optionally, the consumption current of the plurality of discharge devices is a rated current or a real-time operating current of the plurality of discharge devices.
In the above embodiment of the present invention, optionally, the discharge device is a cell heater.
In the above embodiment of the present invention, optionally, the discharge device includes a cell heater and a load.
In the above embodiment of the present invention, optionally, the battery loop current obtaining unit 404 is configured to: and acquiring the battery loop current in the circuit where the battery is positioned at preset time intervals.
Fig. 5 shows a block diagram of a battery management system of one embodiment of the present invention.
As shown in fig. 5, the battery management system 500 according to an embodiment of the present invention includes the charging current control apparatus 400 shown in fig. 4, and therefore, the battery management system 500 has the same technical effects as the charging current control apparatus 400 shown in fig. 4, and is not repeated herein.
FIG. 6 illustrates a block diagram of a vehicle of one embodiment of the present invention.
As shown in fig. 6, a vehicle 600 according to an embodiment of the present invention includes the charging current control device 400 shown in fig. 4, and therefore, the vehicle 600 has the same technical effects as the charging current control device 400 shown in fig. 4, and will not be described again.
The vehicle 600 includes, but is not limited to, electric vehicles and hybrid vehicles, among others.
FIG. 7 shows a block diagram of an apparatus of an embodiment of the invention.
As shown in fig. 7, the apparatus 700 according to an embodiment of the present invention includes the charging current control device 400 and the rechargeable battery 702 shown in fig. 4, and the charging current control device 400 is used for controlling the charging current of the rechargeable battery 702. Therefore, the device 700 has the same technical effects as the charging current control apparatus 400 shown in fig. 4, and will not be described again. The device 700 includes, but is not limited to, a household appliance.
The technical scheme of the invention is explained in detail in the above with the help of the attached drawings, and through the technical scheme of the invention, the charging current can be effectively controlled, and the influence of inappropriate charging current on the performance of the battery can be reduced.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe the charging currents in the embodiments of the present invention, the charging currents should not be limited to these terms. These terms are used only to distinguish charging currents from each other. For example, the first charging current may also be referred to as the second charging current, and similarly, the second charging current may also be referred to as the first charging current without departing from the scope of embodiments of the present invention.
The word "if" as used herein may be interpreted as "at 8230; \8230;" or "when 8230; \8230;" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (a stated condition or event)" may be interpreted as "upon determining" or "in response to determining" or "upon detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)", depending on the context.
In the several embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer-readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A charging current control method, comprising:
in the process of charging the battery, determining a first charging current according to the allowable charging current of the battery and the opening and closing state of a discharging device in a circuit where the battery is located; the discharge device comprises a cell heater and a load, and the load comprises a whole vehicle load;
in the process of charging the battery through the first charging current, acquiring a battery loop current in a circuit where the battery is located, wherein the battery loop current is an actual charging current of the battery;
calculating a difference current between the battery loop current and the battery allowable charging current;
detecting an open-closed state of a discharge device in the circuit;
adjusting the first charging current to a second charging current according to the difference current, comprising:
when the detection result is that the discharge devices in the circuit are all in an open circuit state, setting the sum of the first charging current and the difference current as the second charging current;
when the detection result is that a plurality of discharge devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharge devices, the first charging current and the difference current as the second charging current.
2. The charging current control method according to claim 1, wherein the step of determining the first charging current according to the allowable charging current of the battery and the on-off state of a discharging device in a circuit in which the battery is located comprises:
detecting an open-closed state of a discharge device in the circuit;
when the detection result shows that the discharge devices in the circuit are all in the open circuit state, determining the allowable charging current of the battery as the first charging current;
when the detection result is that a plurality of discharging devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharging devices and the allowable charging current of the battery as the first charging current.
3. The charge current control method of claim 1 or 2, wherein the consumption current of the number of discharge devices is a rated current or a real-time operation current of the number of discharge devices.
4. The charging current control method according to claim 1, wherein the step of obtaining the battery loop current in the circuit in which the battery is located comprises:
and acquiring the current of a battery loop in a circuit where the battery is positioned at intervals of preset time.
5. A charging current control apparatus, comprising:
the charging current determining unit is used for determining a first charging current according to the allowable charging current of the battery and the on-off state of a discharging device in a circuit where the battery is located in the charging process of the battery; the discharge device comprises a cell heater and a load, and the load comprises a whole vehicle load;
the battery loop current acquisition unit is used for acquiring a battery loop current in a circuit where the battery is located in the process of charging the battery through the first charging current, wherein the battery loop current is an actual charging current of the battery;
a differential current calculation unit that calculates a differential current between the battery loop current and the battery allowable charging current;
a detection unit for detecting an open/close state of a discharge device in the circuit;
a charging current adjusting unit, which adjusts the first charging current to a second charging current according to the difference current, comprising:
when the detection result is that the discharge devices in the circuit are all in an open circuit state, setting the sum of the first charging current and the difference current as the second charging current;
and when the detection result is that a plurality of discharge devices in the circuit are in a pass state, determining the sum of the consumption current of the plurality of discharge devices, the first charging current and the difference current as the second charging current.
6. A battery management system comprising the charging current control apparatus according to claim 5.
7. A vehicle characterized by comprising the charging current control apparatus according to claim 5.
8. A chargeable device, comprising:
a rechargeable battery;
the charge current control device of claim 5, for controlling the charge current to said rechargeable battery.
9. A computer-readable storage medium comprising computer instructions stored thereon for performing the charging current control method of any one of claims 1 to 4.
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| CN112477696A (en) * | 2020-11-12 | 2021-03-12 | 浙江合众新能源汽车有限公司 | Current control method and device for slow charging |
| CN116667472B (en) * | 2022-12-06 | 2023-11-24 | 荣耀终端有限公司 | Charging method and device |
| CN116080460B (en) * | 2023-04-10 | 2023-06-23 | 武汉爽润科技有限公司 | Quick power battery charging method based on charging pile |
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