CN115882544A - Battery charging control method and device, electronic equipment and vehicle - Google Patents
Battery charging control method and device, electronic equipment and vehicle Download PDFInfo
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- CN115882544A CN115882544A CN202111155211.9A CN202111155211A CN115882544A CN 115882544 A CN115882544 A CN 115882544A CN 202111155211 A CN202111155211 A CN 202111155211A CN 115882544 A CN115882544 A CN 115882544A
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Abstract
The disclosure relates to a control method and device for battery charging, an electronic device and a vehicle, and relates to the technical field of battery charging, wherein the method comprises the following steps: under the condition that the charging state of a vehicle battery is full charge, periodically acquiring a first voltage value of each battery cell in the battery within first preset time; taking the maximum value of the plurality of first voltage values as a second voltage value; determining a charging target current value of the battery according to the second voltage value and the preset voltage value under the condition that the second voltage value is greater than or equal to the preset voltage value; determining a charging target voltage value of the battery according to the target current value; and taking the target voltage value as the charging cut-off voltage of the battery, and taking the target current value as the charging current corresponding to the battery at the charging end stage. Therefore, the battery is charged by the new charging current and the new charging cut-off voltage at the tail end stage when the battery is charged next time, the problem of over-charging of individual battery cores of the battery can be effectively avoided, and the safe use of the battery is ensured.
Description
Technical Field
The present disclosure relates to the field of battery charging technologies, and in particular, to a method and an apparatus for controlling battery charging, an electronic device, and a vehicle.
Background
With the increase of the number of new energy automobiles and electric automobiles, the fire accident of various vehicle battery packs also frequently occurs. And part of accidents occur in the standing stage after the vehicle is charged, and because the battery is in a high-charge state in the standing stage after the battery is fully charged, the chemical energy between the anode and the cathode of the battery is relatively high, and the accidents are easy to occur. After the parallelly connected module battery is fully filled, there is the voltage difference between the electric core of each battery in every module to lead to total voltage between each parallelly connected module to have the difference, the module is always pressed high can to the module of always pressing down to charge, can lead to individual electric core overcharge. In the past, uncontrollable conditions such as battery cell failure and the like occur, and finally, fire accidents of the battery pack can be caused. While a BMS (Battery Management System) System is in a dormant state after a Battery is fully charged, and cannot find a problem of overcharge of a Battery cell when an overcharge occurs in an individual Battery cell.
Disclosure of Invention
In order to solve the above problems, the present disclosure provides a control method and apparatus for battery charging, an electronic device, and a vehicle.
In a first aspect, the present disclosure provides a method for controlling battery charging, the method comprising: under the condition that the charging state of a vehicle battery is full charge, periodically acquiring a first voltage value of each battery cell in the battery within first preset time; taking the maximum value of the first voltage values as a second voltage value; determining a charging target current value of the battery according to the second voltage value and a preset voltage value under the condition that the second voltage value is greater than or equal to the preset voltage value; determining a charging target voltage value of the battery according to the target current value; and taking the target voltage value as the charging cut-off voltage of the battery, and taking the target current value as the charging current corresponding to the battery at the charging end stage.
Optionally, the determining the target current value of the battery according to the second voltage value and the preset voltage value includes: determining a current target reduction value of the battery according to the second voltage value and the preset voltage value; acquiring a current value corresponding to the battery at a charging end stage; and taking the difference value between the current value and the target reduction value as the target current value of the battery.
Optionally, the determining a target voltage value of the battery according to the target current value includes: and determining a target voltage value of the battery through a preset corresponding relation according to the target current value, wherein the preset corresponding relation comprises a preset corresponding relation between a charging current value and a charging cut-off voltage value.
Optionally, the state of charge of the vehicle battery is determined to be fully charged by: and determining the charging state of the vehicle battery to be full charge under the condition that the voltage value of a battery cell in the plurality of battery cells of the battery reaches a preset voltage value.
Optionally, the method further comprises: and controlling the battery to stop charging under the condition that the charging state of the vehicle battery is determined to be full charging.
Optionally, the method further comprises: and under the condition that the charging state of the vehicle battery is full, if second preset time is reached, entering a dormant state, wherein the second preset time is greater than the first preset time.
Optionally, the preset correspondence further includes a correspondence between a preset charging current value and a maximum voltage value, and the second preset time is obtained by: controlling the battery to be charged at a preset current value at a charging terminal stage; under the condition that the charging state of the battery is full charge, acquiring a third voltage value of a specified battery cell, and periodically acquiring a fourth voltage value of the specified battery cell within a third preset time, wherein the specified battery cell is the battery cell with the highest voltage in the plurality of battery cells when the battery is charged at the preset current value; setting a maximum value of the plurality of fourth voltage values as a fifth voltage value; and determining the second preset time according to a time period from the time when the specified battery cell reaches the third voltage value to the time when the specified battery cell reaches the fifth voltage value.
In a second aspect, the present disclosure provides a control apparatus for battery charging, the apparatus comprising: the system comprises a first voltage value acquisition module, a second voltage value acquisition module and a control module, wherein the first voltage value acquisition module is used for periodically acquiring a first voltage value of each battery cell in a vehicle battery within first preset time under the condition that the charging state of the battery is full charge; the second voltage value determining module is used for taking the maximum value in the first voltage values as a second voltage value; the target current value determining module is used for determining a charging target current value of the battery according to the second voltage value and a preset voltage value under the condition that the second voltage value is greater than or equal to the preset voltage value; the target voltage value determining module is used for determining a charging target voltage value of the battery according to the target current value; and the control module is used for taking the target voltage value as the charging cut-off voltage of the battery and taking the target current value as the charging current corresponding to the battery at the charging tail end stage.
Optionally, the target current value determination module includes: the target reduction value determining submodule is used for determining a current target reduction value of the battery according to the second voltage value and the preset voltage value; the current value acquisition submodule is used for acquiring a current value corresponding to the battery at the charging terminal stage; a target current value determination submodule configured to determine a difference between the current value and the target reduction value as a target current value of the battery.
Optionally, the target voltage value determining module is configured to determine the target voltage value of the battery according to the target current value through a preset corresponding relationship, where the preset corresponding relationship includes a preset corresponding relationship between a charging current value and a charging cut-off voltage value.
Optionally, the state of charge of the vehicle battery is determined to be fully charged by: the full charge determining module is used for determining that the charging state of the vehicle battery is full charge under the condition that the voltage value of a battery cell in the battery cells reaches a preset voltage value.
Optionally, the apparatus further comprises: and the charging stopping module is used for controlling the battery to stop charging under the condition that the charging state of the vehicle battery is determined to be full charging.
Optionally, the apparatus further comprises: and the dormancy module is used for entering a dormancy state if second preset time is reached under the condition that the charging state of the vehicle battery is full charge, wherein the second preset time is greater than the first preset time.
Optionally, the preset correspondence further includes a correspondence between a preset charging current value and a maximum voltage value, and the second preset time is obtained by the following means: the charging control module is used for controlling the battery to be charged at a preset current value at the charging tail end stage; the voltage value acquisition module is used for acquiring a third voltage value of a specified battery cell and periodically acquiring a fourth voltage value of the specified battery cell within a third preset time under the condition that the charging state of the battery is full charge, wherein the specified battery cell is the battery cell with the highest voltage in the plurality of battery cells when the battery is charged at the preset current value; a fifth voltage value determination module, configured to use a maximum value of the plurality of fourth voltage values as a fifth voltage value; and the second preset time determining module is configured to determine the second preset time according to a time period from a time when the specified battery cell reaches the third voltage value to a time when the specified battery cell reaches the fifth voltage value.
In a third aspect, the present disclosure provides an electronic device comprising: a memory having a computer program stored thereon; a processor for executing the computer program in the memory to implement the steps of the above-described control method for battery charging.
In a fourth aspect, the present disclosure provides a vehicle comprising the electronic device described above.
According to the technical scheme, under the condition that the charging state of the vehicle battery is full charge, first voltage values of all battery cores in the battery within first preset time are acquired periodically; setting a maximum value of the plurality of first voltage values as a second voltage value; determining a charging target current value of the battery according to the second voltage value and a preset voltage value under the condition that the second voltage value is greater than or equal to the preset voltage value; determining a charging target voltage value of the battery according to the target current value; and taking the target voltage value as the charging cut-off voltage of the battery, and taking the target current value as the charging current corresponding to the battery at the charging end stage. In this way, the voltage of each cell of the battery can be periodically monitored after the battery is fully charged, and when the voltage of each cell is greater than the preset voltage value, the charging target current value of the battery is determined according to the second voltage value and the preset voltage value, the charging target voltage value is determined according to the target current value, and the target current value and the target voltage value are respectively used as the charging current and the charging cut-off voltage of the new charging end stage. The battery is charged by the new charging current and the new charging cut-off voltage at the end stage when the battery is charged next time, so that the problem of over-charging of individual battery cores of the battery can be effectively avoided, and the safe use of the battery is ensured.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic diagram illustrating variations of various components of a terminal voltage of a battery during a charging process according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a method for controlling battery charging according to an embodiment of the disclosure;
fig. 3 is a schematic flow chart of another control method for charging a battery according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart of another control method for charging a battery according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a parallel battery module according to an embodiment of the present disclosure;
fig. 6 is a schematic flowchart of another control method for charging a battery according to an embodiment of the disclosure;
fig. 7 is a schematic flow chart of another control method for charging a battery according to an embodiment of the disclosure;
fig. 8 is a schematic flow chart of another control method for charging a battery according to an embodiment of the present disclosure;
fig. 9 is a schematic flowchart of another control method for charging a battery according to an embodiment of the disclosure;
fig. 10 is a schematic structural diagram of a control device for charging a battery according to an embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of another control device for battery charging according to an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of another control device for charging a battery according to an embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of another control device for battery charging according to an embodiment of the present disclosure;
fig. 14 is a schematic structural diagram of another control device for battery charging according to an embodiment of the disclosure;
fig. 15 is a schematic structural diagram of another control device for battery charging according to an embodiment of the present disclosure;
fig. 16 is a block diagram of an electronic device provided by an embodiment of the disclosure;
fig. 17 is a block diagram of a vehicle provided by an embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the following description, the terms "first," "second," and the like, are used for distinguishing between descriptions and not necessarily for describing a sequential or chronological order, but rather for indicating or implying a relative importance.
First, an application scenario of the present disclosure is explained, where the present disclosure is applied to a scenario of charging a vehicle battery, and in the scenario, when a voltage value of a certain cell in the battery reaches a preset voltage value, it is determined that the battery is fully charged, and the battery is controlled to stop charging. Because the uniformity principle of battery, at the stationary phase after the battery charges, if the total voltage of the module that the monomer electricity core that reaches preset voltage value is located is lower, and the voltage of other modules is higher, then, the module that module voltage is high can charge to the module that module voltage is low, just can reach the equilibrium when the voltage of each module is unanimous promptly the module that total voltage is high no longer continues to charge to the module that total voltage is low. However, in this case, the module where the single battery cell that reaches the preset voltage value is located is continuously charged, which eventually causes an overcharge phenomenon of the battery cell that triggers the battery to stop charging. In the past, uncontrollable conditions such as the failure of the battery core and the like can be caused, and finally, a fire accident of the battery pack can be caused.
In order to solve the above problems, the present disclosure provides a battery charging control method, a battery charging control apparatus, an electronic device, and a vehicle, which are capable of periodically monitoring voltages of respective battery cells of a battery after the battery is fully charged, determining a charging target current value of the battery according to a second voltage value and a preset voltage value in the case where an individual cell voltage is greater than the preset voltage value, determining the charging target voltage value according to the target current value, and using the target current value and the target voltage value as a charging current and a charging cut-off voltage of a new charging end stage, respectively. The battery is charged with the new charging current and the new charging cut-off voltage at the end stage when the battery is charged next time, so that the problem of overcharging of individual battery cores of the battery can be effectively avoided, and the safe use of the battery is ensured.
Before describing embodiments of the present disclosure, the principles of the background art involved in the present disclosure are explained and presented. In the charging process of the battery, different charging currents are adopted for charging according to different charging stages, and the charging stages are divided by charging voltages. As the charging duration increases, the charging voltage of the battery increases, and the BMS controls the current to perform the down-current charging according to the change of the charging voltage (the change refers to the increase of the voltage), until the battery reaches the charging cut-off voltage, and stops the charging.
Illustratively, taking a change from a charging cutoff voltage of 3.65V to a charging current of 1C to 0.5C, and then from 0.5C to 0.2C as an example, in a charging phase of a battery, the battery is charged with the charging current of 1C, when the charging voltage of the battery reaches a voltage value that triggers charging with the current of 0.5C, the BMS system controls the battery to be charged with the charging current of 0.5C, when the charging voltage of the battery reaches a voltage value that triggers charging with the current of 0.2C, the BMS system controls the battery to be charged with the charging current of 0.2C, at which time the battery enters a charging end phase, in which the voltage of the battery continues to increase, and when the charging voltage of the battery continues to increase to the charging cutoff voltage of 3.65V, the BMS system controls the battery to stop charging. Since the voltage of the battery is constantly increasing throughout the charging process, the above problem can be solved in the present disclosure by only changing the charging strategy of the charging terminal.
The calculation formula of the terminal voltage of the single battery cell in the charging process of the battery is shown as formula 1.1:
U terminal end ＝U OCV +I*(R+r 1 +r 2 ) (1.1)
Wherein, U Terminal end Terminal voltage, U, of the cell OCV Is the open-circuit voltage of the single battery cell, I is the charging current of the single battery cell, R is the ohmic internal resistance of the single battery cell, R 1 Is the electrochemical polarization internal resistance of the single cell, r 2 And the concentration polarization internal resistance of the single battery cell is obtained.
In equation 1.1, U Terminal end From U OCV And I (R + R) 1 +r 2 ) Two parts are formed, wherein, U OCV Determined by the charge of the single battery cell, when the charge capacity of the battery is the same, U is equal OCV The values are also the same. Without changing the charging capacity, U is influenced Terminal end The value is changed to I (R + R) 1 +r 2 ) Wherein R is a constant value, and can be known from the principles of electrochemical polarization and concentration polarization 1 、r 2 Will increase with increasing I, so that the current increases linearly at I (r) 1 +r 2 ) Will be greater than the increase coefficient of I x R. Fig. 1 is a schematic diagram illustrating changes of components of terminal voltage of a battery during a charging process according to an embodiment of the present disclosure, as shown in fig. 1, it can be known that I × r 1 And I r 2 Is significantly greater than the rate of change of I x R. Due to r 1 、r 2 Will increase with increasing I and will decrease with decreasing I, r 1 、r 2 Therefore, in order to ensure that the finally obtained target voltage value can ensure that the battery does not have the situation of cell overcharge, in the embodiment of the disclosure, the target reduction value of the current is calculated according to I × R.
The present disclosure is described below with reference to specific examples.
Fig. 2 is a control method for battery charging according to an embodiment of the present disclosure, applied to a battery controller, which may be a BMS system, and as shown in fig. 2, the method may include the following steps:
s201, under the condition that the charging state of the vehicle battery is full charge, periodically acquiring a first voltage value of each battery cell in the battery within first preset time.
Wherein the first voltage value can be acquired by a voltage acquisition circuit arranged on the vehicle.
S202, the maximum value of the plurality of first voltage values is set as the second voltage value.
And S203, determining a charging target current value of the battery according to the second voltage value and a preset voltage value under the condition that the second voltage value is greater than or equal to the preset voltage value.
And S204, determining a charging target voltage value of the battery according to the target current value.
Specifically, according to the target current value, the target voltage value of the battery may be determined by a preset correspondence relationship including a correspondence relationship of a preset charging current value and a charging cutoff voltage value.
And S205, taking the target voltage value as the charge cut-off voltage of the battery, and taking the target current value as the charging current corresponding to the battery in the charging end stage.
Specifically, when the battery is charged next time, the battery is charged at a target current value at a charging end stage, and the target voltage value is used as a maximum charging cut-off voltage that can be reached by the single battery cell, that is, a charging cut-off voltage of the battery.
By adopting the method, the voltage of each cell of the battery can be periodically monitored after the battery is fully charged, under the condition that the voltage of each cell is greater than the preset voltage value, the charging target current value of the battery is determined according to the second voltage value and the preset voltage value, the charging target voltage value is determined according to the target current value, and the target current value and the target voltage value are respectively used as the charging current and the charging cut-off voltage of a new charging terminal stage. The battery is charged by the new charging current and the new charging cut-off voltage at the end stage when the battery is charged next time, so that the problem of over-charging of individual battery cores of the battery can be effectively avoided, and the safe use of the battery is ensured.
In the present embodiment, the state of charge of the vehicle battery may be determined to be fully charged by the following method, which may include the steps of:
s2011, when a voltage value of a battery cell in a plurality of battery cells of the battery reaches a preset voltage value, determining that the charging state of the vehicle battery is full charge.
Specifically, the preset voltage value is a maximum charge cut-off voltage that can be reached by the battery cell, and the preset voltage value may be set according to configurations of different batteries, which is not limited in this disclosure.
In addition, after determining that the state of charge of the vehicle battery is full, the method further includes:
s2012, if it is determined that the charge state of the vehicle battery is full, controlling the battery to stop charging.
As described below in step S203, the method may include the following steps, as shown in fig. 4, of determining the target current value of the battery according to the second voltage value and the preset voltage value:
and S2031, determining a target current reduction value of the battery according to the second voltage value and the preset voltage value.
Specifically, the target reduction in current for the battery may be determined according to equation 1.2:
wherein, I Reducing the weight of Decrease the value for the target, U 2 Is the second voltage value, U 1 For the preset voltage value, R is the ohmic internal resistance of the individual electric core of the battery and R is a constant value.
And S2032, acquiring a current value corresponding to the battery at the charging terminal stage.
S2033, the difference between the current value and the target reduction value is used as the target current value of the battery. Specifically, the target current value of the battery may be determined according to equation 1.3:
I＝I powder -I Reducing (1.3)
Wherein I is the target current value, I Powder A current value, I, corresponding to the battery at the end of charging Reducing The value is reduced for the target.
As shown in fig. 5, a plurality of battery cells with the same rated capacity may be designed to form a plurality of battery modules, a battery cell with the largest terminal voltage is used as a designated battery cell and forms a battery module No. 1 with the rest of the plurality of battery cells with the lowest terminal voltage, and the rest of the battery cells form a plurality of battery modules respectively according to the number of battery cells which is the same as that of the battery module No. 1. Therefore, the total voltage of the module 1 is the lowest total voltage of all the modules, and in the standing stage after the charging is finished, the rest modules charge the module 1. At this time, the preset corresponding relationship can be obtained only by recording the charge cut-off voltage value of the specified battery cell under the condition of charging at different preset charge current values and the highest voltage value within the fourth preset time.
For example, as shown in fig. 6, the preset corresponding relationship may be obtained by:
s601, controlling the battery to be charged at a charging end stage by a plurality of groups of preset charging current values respectively.
And S602, respectively acquiring multiple groups of sixth voltage values of the specified battery cell corresponding to different preset charging current values under the condition that the battery is charged with the preset charging capacity.
The preset charging capacity is the charging capacity when the battery reaches a preset voltage value under the condition of charging at a specified current value, and the specified current value is the maximum current value in a plurality of groups of preset charging current values. The sixth voltage value is a charging cut-off voltage value corresponding to the specified battery cell when the specified battery cell is charged at the charging end stage with different preset charging current values. The sixth voltage value may be acquired by a voltage acquisition circuit provided on the vehicle.
S603, determining the preset corresponding relation according to the multiple groups of preset charging current values and the multiple groups of sixth voltage values.
The plurality of groups of preset charging current values are charging currents of the battery at different charging end stages, and the plurality of groups of sixth voltage values are charging cut-off voltages corresponding to the plurality of groups of preset charging current values respectively.
Considering that the battery controller can cause energy waste to a certain extent when the battery controller continues to work under the condition of no working requirement, the battery controller can enter a dormant state under the condition of no working requirement, so that energy can be saved to a greater extent.
As shown in fig. 7, the method may further include:
and S206, under the condition that the charging state of the vehicle battery is full, if a second preset time is reached, entering a dormant state, wherein the second preset time is greater than the first preset time.
The preset corresponding relationship further includes a corresponding relationship between a preset charging current value and a preset maximum voltage value, as shown in fig. 8, the second preset time is obtained through the following steps:
and S801, controlling the battery to be charged at a preset current value at the charging end stage.
The preset current value is the maximum value of the plurality of groups of preset charging current values. Charging with the maximum value of the multiple groups of preset charging current values can ensure that the actual maximum voltage value of the battery cell can be obtained when the obtained second preset time can meet the requirement of charging with other preset charging current values.
And S802, under the condition that the charging state of the battery is full charge, acquiring a third voltage value of a designated battery cell, and periodically acquiring a fourth voltage value of the designated battery cell within a third preset time, wherein the designated battery cell is the battery cell with the highest voltage in a plurality of battery cells when the battery is charged at the preset current value.
Wherein the third voltage value and the fourth voltage value can be obtained by a voltage acquisition circuit provided on the vehicle.
S803, the maximum value among the plurality of fourth voltage values is set as the fifth voltage value.
S804, determining the second preset time according to a time period from a time when the designated battery cell reaches the third voltage value to a time when the designated battery cell reaches the fifth voltage value.
The second preset time may be greater than or equal to a time period from a time when the designated battery cell reaches the third voltage value to a time when the designated battery cell reaches the fifth voltage value, so as to ensure that the battery controller may detect the actual highest voltage value of the battery cell within the second preset time.
Fig. 9 is another control method for charging a battery according to an embodiment of the present disclosure, as shown in fig. 9, the method includes the following steps:
s901, under the condition that the charging state of the vehicle battery is full charge, periodically acquiring a first voltage value of each battery cell in the battery within first preset time.
S902, the maximum value of the plurality of first voltage values is set as a second voltage value.
And S903, judging whether the second voltage value is greater than or equal to a preset voltage value.
If the second voltage value is greater than or equal to the predetermined voltage value, go to step S904;
if the second voltage value is smaller than the predetermined voltage value, step S901 is performed.
The preset voltage value is the charge cut-off voltage value of the single battery cell.
And S904, determining the charging target current value of the battery according to the second voltage value and the preset voltage value.
And S905, determining a charging target voltage value of the battery according to the target current value.
And determining a target voltage value of the battery through a preset corresponding relation according to the target current value, wherein the preset corresponding relation comprises a corresponding relation between a preset charging current value and a preset charging cut-off voltage value.
And S906, taking the target voltage value as the charge cut-off voltage of the battery, and taking the target current value as the corresponding charge current of the battery at the charging end stage.
By adopting the method, the voltage of each cell of the battery can be periodically monitored after the battery is fully charged, under the condition that the voltage of each cell is greater than the preset voltage value, the charging target current value of the battery is determined according to the second voltage value and the preset voltage value, the charging target voltage value is determined according to the target current value, and the target current value and the target voltage value are respectively used as the charging current and the charging cut-off voltage of a new charging terminal stage. The battery is charged by the new charging current and the new charging cut-off voltage at the end stage when the battery is charged next time, so that the problem of over-charging of individual battery cores of the battery can be effectively avoided, and the safe use of the battery is ensured.
Fig. 10 is a control device for charging a battery according to an embodiment of the present disclosure, where the device 1000 includes:
a first voltage value obtaining module 1001, configured to periodically obtain, when a charging state of a vehicle battery is a full charge state, a first voltage value of each battery cell in the battery within a first preset time;
a second voltage value determining module 1002, configured to use a maximum value of the plurality of first voltage values as a second voltage value;
a target current value determining module 1003, configured to determine a charging target current value of the battery according to the second voltage value and a preset voltage value when the second voltage value is greater than or equal to the preset voltage value;
as shown in fig. 11, the target current value determining module 1003 includes:
a target reduction value determining submodule 10031 for determining a target reduction value of the current of the battery according to the second voltage value and the preset voltage value;
the current value obtaining submodule 10032 is configured to obtain a current value corresponding to the battery at the charging end stage;
the target current value determining submodule 10033 is configured to determine a difference between the current value and the target reduction value as the target current value of the battery.
A target voltage value determining module 1004, configured to determine a charging target voltage value of the battery according to the target current value;
the target voltage value determining module 1004 is configured to determine the target voltage value of the battery according to the target current value through a preset corresponding relationship, where the preset corresponding relationship includes a preset corresponding relationship between a charging current value and a charging cut-off voltage value.
The control module 1005 is configured to use the target voltage value as a charge cut-off voltage of the battery, and use the target current value as a charging current corresponding to the end stage of charging the battery.
By adopting the device, the voltage of each cell of the battery can be periodically monitored after the battery is fully charged, under the condition that the voltage of each cell is greater than the preset voltage value, the charging target current value of the battery is determined according to the second voltage value and the preset voltage value, the charging target voltage value is determined according to the target current value, and the target current value and the target voltage value are respectively used as the charging current and the charging cut-off voltage of a new charging terminal stage. The battery is charged with the new charging current and the new charging cut-off voltage at the end stage when the battery is charged next time, so that the problem of overcharging of individual battery cores of the battery can be effectively avoided, and the safe use of the battery is ensured.
As shown in fig. 12, the state of charge of the vehicle battery may be determined to be fully charged by:
a full charge determining module 1201, configured to determine that the charging state of the vehicle battery is full charge when a voltage value of a cell existing in a plurality of cells of the battery reaches a preset voltage value.
The apparatus 1000 further comprises:
a charge stop module 1202 for controlling the battery to stop charging if the state of charge of the vehicle battery is determined to be fully charged.
The preset correspondence relationship is described below, and may be obtained by the following means, for example, as shown in fig. 13:
the first charging module 1301 is configured to control the battery to be charged at a charging end stage with a plurality of groups of preset charging current values.
A sixth voltage value obtaining module 1302, configured to obtain multiple sets of sixth voltage values of the specified electrical core corresponding to different preset charging current values respectively when the battery is charged with the preset charging capacity.
The preset charging capacity is the charging capacity when the battery reaches a preset voltage value under the condition of charging with a specified current value, and the specified current value is the maximum current value in a plurality of groups of preset charging current values. The sixth voltage value is a charging cut-off voltage value corresponding to the specified battery cell when the specified battery cell is charged at the charging end stage with different preset charging current values.
And a preset corresponding relationship determining module 1303, configured to determine the preset corresponding relationship according to the multiple groups of preset charging current values and the multiple groups of sixth voltage values.
Considering that the battery controller can cause energy waste to a certain extent when the battery controller continues to work under the condition of no working requirement, the battery controller can enter a dormant state under the condition of no working requirement, so that energy can be saved to a greater extent. As shown in fig. 14, the apparatus further includes:
the sleep module 1006 is configured to enter a sleep state if a second preset time is reached when the charging state of the vehicle battery is fully charged, where the second preset time is greater than the first preset time.
In addition, the preset corresponding relationship further includes a corresponding relationship between a preset charging current value and a maximum voltage value, as shown in fig. 15, the second preset time may be obtained by:
a second charging module 1501, configured to control the battery to be charged at a preset current value at a charging end stage;
a voltage value obtaining module 1502, configured to obtain a third voltage value of a specified electrical core when the charging state of the battery is full charge, and periodically obtain a fourth voltage value of the specified electrical core within a third preset time, where the specified electrical core is a highest voltage electrical core of the plurality of electrical cores when the battery is charged at the preset current value;
a fifth voltage value determining module 1503, configured to use a maximum value of a plurality of the fourth voltage values as a fifth voltage value;
a second preset time determining module 1504, configured to determine the second preset time according to a time period between a time when the specified battery cell reaches the third voltage value and a time when the specified battery cell reaches the fifth voltage value.
By adopting the device, the voltage of each battery cell of the battery can be periodically monitored after the battery is fully charged, under the condition that the voltage of each battery cell is greater than the preset voltage value, the charging target current value of the battery is determined according to the second voltage value and the preset voltage value, the charging target voltage value is determined according to the target current value, and the target current value and the target voltage value are respectively used as the charging current and the charging cut-off voltage of a new charging terminal stage. The battery is charged with the new charging current and the new charging cut-off voltage at the end stage when the battery is charged next time, so that the problem of overcharging of individual battery cores of the battery can be effectively avoided, and the safe use of the battery is ensured.
With regard to the apparatus in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be described in detail here.
Fig. 16 is a block diagram illustrating an electronic device 1600 in accordance with an example embodiment. As shown in fig. 16, the electronic device 1600 may include: a processor 1601, a memory 1602. The electronic device 1600 may also include one or more of a multimedia component 1603, an input/output (I/O) interface 1604, and a communication component 1605.
The processor 1601 is configured to control the overall operation of the electronic device 1600, so as to complete all or part of the steps in the above control method for charging the battery. The memory 1602 is used to store various types of data to support operation at the electronic device 1600, such as data that may include instructions for any application or method operating on the electronic device 1600, as well as application-related data, such as contact data, messaging, pictures, audio, video, and the like. The Memory 1602 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically Erasable Programmable Read-Only Memory (EEPROM), erasable Programmable Read-Only Memory (EPROM), programmable Read-Only Memory (PROM), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. Multimedia components 1603 may include screen and audio components. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may further be stored in memory 1602 or transmitted through communications component 1605. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 1604 provides an interface between the processor 1601 and other interface modules, such as a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 1605 is for wired or wireless communication between the electronic device 1600 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, or combinations thereof, which is not limited herein. The corresponding communication component 1605 may thus include: wi-Fi module, bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic Device 1600 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-mentioned battery charging control method.
In another exemplary embodiment, there is also provided a computer readable storage medium including program instructions, which when executed by a processor, implement the steps of the above-described battery charging control method. For example, the computer readable storage medium may be the memory 1602 described above including program instructions that are executable by the processor 1601 of the electronic device 1600 to perform the control method of battery charging described above.
Fig. 17 is a block diagram of a vehicle provided in the embodiment of the present disclosure, and as shown in fig. 17, the vehicle 1700 includes the electronic device 1600 described above.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and the simple modifications all belong to the protection scope of the present disclosure
It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.
Claims (10)
1. A method of controlling charging of a battery, the method comprising:
under the condition that the charging state of a vehicle battery is full charge, periodically acquiring a first voltage value of each battery cell in the battery within first preset time;
taking the maximum value of the first voltage values as a second voltage value;
determining a charging target current value of the battery according to the second voltage value and a preset voltage value under the condition that the second voltage value is greater than or equal to the preset voltage value;
determining a charging target voltage value of the battery according to the target current value;
and taking the target voltage value as the charging cut-off voltage of the battery, and taking the target current value as the charging current corresponding to the battery at the charging end stage.
2. The method of claim 1, wherein determining the target current value for the battery based on the second voltage value and the preset voltage value comprises:
determining a target reduction value of the current of the battery according to the second voltage value and the preset voltage value;
acquiring a current value corresponding to the battery at a charging terminal stage;
and taking the difference value between the current value and the target reduction value as the target current value of the battery.
3. The method of claim 1, wherein determining the target voltage value for the battery based on the target current value comprises:
and determining a target voltage value of the battery through a preset corresponding relation according to the target current value, wherein the preset corresponding relation comprises a preset corresponding relation between a charging current value and a charging cut-off voltage value.
4. The method of claim 1, wherein the state of charge of the vehicle battery is determined to be fully charged by:
and determining the charging state of the vehicle battery to be full charge under the condition that the voltage value of a battery cell in the plurality of battery cells of the battery reaches a preset voltage value.
5. The method of claim 4, further comprising:
and controlling the battery to stop charging under the condition that the charging state of the vehicle battery is determined to be full charging.
6. The method according to any one of claims 1 to 5, further comprising:
and under the condition that the charging state of the vehicle battery is full, if second preset time is reached, entering a dormant state, wherein the second preset time is greater than the first preset time.
7. The method according to claim 6, wherein the preset correspondence further includes a correspondence between a preset charging current value and a maximum voltage value, and the second preset time is obtained by:
controlling the battery to be charged at a preset current value at a charging tail end stage;
when the charging state of the battery is full charge, acquiring a third voltage value of a specified battery cell, and periodically acquiring a fourth voltage value of the specified battery cell within a third preset time, wherein the specified battery cell is a battery cell with the highest voltage in a plurality of battery cells when the battery is charged at the preset current value;
setting a maximum value of the plurality of fourth voltage values as a fifth voltage value;
and determining the second preset time according to a time period from the time when the specified battery cell reaches the third voltage value to the time when the specified battery cell reaches the fifth voltage value.
8. A control device for battery charging, the device comprising:
the system comprises a first voltage value acquisition module, a second voltage value acquisition module and a control module, wherein the first voltage value acquisition module is used for periodically acquiring a first voltage value of each battery cell in a battery within first preset time under the condition that the charging state of a vehicle battery is full charge;
the second voltage value determining module is used for taking the maximum value in the first voltage values as a second voltage value;
the target current value determining module is used for determining a charging target current value of the battery according to the second voltage value and a preset voltage value under the condition that the second voltage value is greater than or equal to the preset voltage value;
the target voltage value determining module is used for determining a charging target voltage value of the battery according to the target current value;
and the control module is used for taking the target voltage value as the charging cut-off voltage of the battery and taking the target current value as the charging current corresponding to the battery at the charging tail end stage.
9. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of controlling battery charging of any of claims 1 to 7.
10. A vehicle characterized by comprising the electronic device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111155211.9A CN115882544A (en) | 2021-09-29 | 2021-09-29 | Battery charging control method and device, electronic equipment and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111155211.9A CN115882544A (en) | 2021-09-29 | 2021-09-29 | Battery charging control method and device, electronic equipment and vehicle |
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| Publication Number | Publication Date |
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| CN115882544A true CN115882544A (en) | 2023-03-31 |
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| CN202111155211.9A Pending CN115882544A (en) | 2021-09-29 | 2021-09-29 | Battery charging control method and device, electronic equipment and vehicle |
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| Country | Link |
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| CN (1) | CN115882544A (en) |
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