CN112952962B - Charging current control method and device based on temperature parameters - Google Patents
Charging current control method and device based on temperature parameters Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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Abstract
The invention discloses a charging current control method and device based on temperature parameters. The charging circuit and the charging method control the switching of the charging current based on two factors of the environment temperature and the temperature of the charging circuit, and determine each preset charging current value according to the environment temperature, so that the charging circuit and the charging method can adapt to complex factors such as the environment temperature under specific application scenes, ensure that the temperature rise of the charging circuit is in line with expectations, and avoid adverse effects caused by overhigh temperature. The invention does not increase the occupied PCB space and the hardware cost.
Description
Technical Field
The invention relates to the technical field of protection of a battery of an electronic product in a charging process, in particular to a charging current control method and a charging current control device based on temperature parameters.
Background
Electronic products generally adopt lithium batteries as power supplies, and lithium battery charging circuits are sensitive to temperature factors, so that once the phenomenon that the charging circuits are overheated occurs, the charging effect and the service life of products are influenced, the shells of the products are possibly overheated, even the main boards are burnt out, and potential safety hazards also exist.
At present, a charging circuit charges a lithium battery in two control modes, namely constant-current charging and constant-voltage charging, wherein the lithium battery is charged at a constant current, and the lithium battery is charged to a certain voltage and then is charged at a constant voltage, and the relationship between the charging current and the temperature of the charging circuit is particularly close. Along with the continuous increase of the capacity of the existing battery and the continuous improvement of the requirement on the charging speed, the required charging current is also increased, the continuous high-current charging is easier to cause the continuous rise of the temperature, and a more effective control means is required to be adopted to control the magnitude of the charging current in the charging process. .
However, in the prior art, the charging current can only be directly switched between a plurality of current values according to the temperature parameter of the charging circuit detected by the temperature sensor, wherein the current values are also preset fixed values. The charging current control method cannot adapt to the influence caused by environmental temperature factors under different application scenes of electronic products, and the magnitude of the current value is preset by experience, so that the temperature change of the charging circuit after the current value is adopted cannot be ensured to be in accordance with the expectation.
Meanwhile, related hardware is required to be added in the prior art for controlling the charging current according to the temperature parameter, so that the cost of the BOM is increased, and the originally limited space of the PCB is more strained.
Therefore, in order to solve the problem that the charging current can be effectively controlled without increasing the cost and the size of the PCB, different environmental temperature factors are adapted to ensure that the temperature of the charging circuit meets expectations, and a more practical and cheaper scheme needs to be found.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a charging current control method and apparatus based on temperature parameters. The charging circuit and the charging method control the switching of the charging current based on two factors of the environment temperature and the temperature of the charging circuit, and determine each preset charging current value according to the environment temperature, so that the charging circuit and the charging method can adapt to complex factors such as the environment temperature under specific application scenes, ensure that the temperature rise of the charging circuit is in line with expectations, and avoid adverse effects caused by overhigh temperature. The invention does not increase the occupied PCB space and the hardware cost.
The invention provides a charging current control method based on temperature parameters, which is characterized by comprising the following steps of:
for the battery after complete discharge, charging the battery under a plurality of rated environment temperatures until the temperature value of the battery reaches a preset temperature rise limit value, and taking the temperature value of a charging circuit at the moment as a reference temperature rise point;
for each environment temperature interval, calculating a charging current switching temperature threshold corresponding to the environment temperature interval by taking the reference temperature rise point as a reference, and obtaining a final charging current switching temperature threshold after margin calibration;
for each environment temperature interval, determining a charging current value of which the temperature value of the charging circuit does not exceed the charging current switching temperature threshold value after charging for a preset time period through testing, and taking the charging current value as a temperature-controlled charging current value applicable to the environment temperature interval;
charging at a first charging current value, and monitoring a temperature value of a charging circuit in real time;
and when the temperature value of the charging circuit is judged to be more than or equal to the charging current switching temperature threshold value, switching to a temperature control charging current value corresponding to the environment temperature interval where the current environment temperature value is located for charging.
Preferably, the temperature-controlled charging current value is obtained by testing in the following way: for the battery after complete discharge, respectively carrying out a charging test aiming at the reference temperature rise point corresponding to each interval on each environment temperature interval; in each charging test process, charging is carried out according to the test charging current value, and the charging test time length is set; if the temperature of the charging circuit reaches the charging current switching temperature threshold value within the charging test time length, reducing the test charging current value by a preset amount, and then repeating the test after the battery is completely discharged again; and taking the test charging current value as the temperature control charging current value applicable to the environment temperature interval until the temperature of the charging circuit does not exceed the charging current switching temperature threshold value within the charging test time length.
Preferably, the battery temperature value is converted by a temperature-sensitive resistance value built in the battery to serve as the current environment temperature value.
Preferably, when the temperature value of the battery does not enter a temperature interval suitable for large current, the charging is started at a preset initial charging current value; and when the temperature value of the battery enters a preset temperature interval suitable for large current, switching to charging by adopting the first charging current value.
Preferably, for the ambient temperature interval
Under the condition of not more than 25 ℃, calculating the charging current switching temperature threshold value by taking the corresponding reference temperature rise point T1 as reference
Is T1; for an ambient temperature range of 25 deg.C
At most 35 deg.C, calculating charging current switching temperature threshold with corresponding reference temperature rise points T1 and T2 as reference
=T1+（T2-T1）*
(ii) a For an ambient temperature range of 35 deg.C
At most 40 deg.C, calculating charging current switching temperature threshold with corresponding reference temperature rise points T2 and T3 as reference
=T2+（T3-T2）*
(ii) a For the ambient temperature interval
Calculating a charging current switching temperature threshold value by taking the corresponding reference temperature rise point T3 as reference at 40 DEG C
=T3。
The invention also provides a charging current control device based on the temperature parameter, which comprises: the charging circuit comprises a charging circuit, a charging circuit temperature sensor, an ambient temperature sensing component and a charging current temperature control module;
the charging circuit temperature sensor is used for monitoring the temperature value of the charging circuit in real time;
the environment temperature sensing component is used for obtaining a current environment temperature value;
the charging circuit is used for charging the battery by using a first charging current value and switching to a temperature control charging current value corresponding to an environment temperature interval in which a current environment temperature value is located to charge under the control of charging current temperature control;
the charging current temperature control module is used for acquiring a charging current switching temperature threshold value and an applicable temperature control charging current value for each environment temperature interval, and controlling the charging circuit to be switched to the temperature control charging current value corresponding to the environment temperature interval where the current environment temperature value is located for charging when the charging circuit temperature value is judged to be greater than or equal to the charging current switching temperature threshold value;
the charging current temperature control module charges the battery after complete discharge at a plurality of rated environmental temperatures until the temperature value of the battery reaches a preset temperature rise limit value, and the temperature value of the charging circuit at the moment is used as a reference temperature rise point; for each environment temperature interval, calculating a charging current switching temperature threshold corresponding to the environment temperature interval by taking the reference temperature rise point as a reference, and obtaining a final charging current switching temperature threshold after margin calibration; and for each environment temperature interval, the charging current temperature control module determines a charging current value of which the temperature value of the charging circuit does not exceed the charging current switching temperature threshold value after charging for a preset time period through testing, and the charging current value is used as a temperature control charging current value applicable to the environment temperature interval.
Preferably, the charging current temperature control module tests and obtains the temperature-controlled charging current value in the following way: for the battery after complete discharge, respectively carrying out a charging test aiming at the reference temperature rise point corresponding to each interval on each environment temperature interval; in each charging test process, charging is carried out according to the test charging current value, and the charging test time length is set; if the temperature of the charging circuit reaches the charging current switching temperature threshold value within the charging test time length, reducing the test charging current value by a preset amount, and then repeating the test after the battery is completely discharged again; and taking the test charging current value as the temperature control charging current value applicable to the environment temperature interval until the temperature of the charging circuit does not exceed the charging current switching temperature threshold value within the charging test time length.
Preferably, the environment temperature sensing part converts a battery temperature value through a resistance value of a temperature sensitive resistor built in the battery to serve as the current environment temperature value.
Preferably, when the temperature value of the battery does not enter a temperature interval suitable for large current, the charging current temperature control module controls the charging circuit to start charging at a preset initial charging current value; when the temperature value of the battery enters a preset temperature interval suitable for large current, the charging current temperature control module controls the charging circuit to be switched to adopt the first charging current value for charging.
Preferably, for the ambient temperature interval
Under the condition of not more than 25 ℃, calculating the charging current switching temperature threshold value by taking the corresponding reference temperature rise point T1 as reference
Is T1; for an ambient temperature range of 25 deg.C
At most 35 deg.C, calculating charging current switching temperature threshold with corresponding reference temperature rise points T1 and T2 as reference
=T1+（T2-T1）*
(ii) a For an ambient temperature range of 35 deg.C
At most 40 deg.C, calculating charging current switching temperature threshold with corresponding reference temperature rise points T2 and T3 as reference
=T2+（T3-T2）*
(ii) a For the ambient temperature interval
Calculating a charging current switching temperature threshold value by taking the corresponding reference temperature rise point T3 as reference at 40 DEG C
=T3。
The beneficial effects of the technical scheme of the invention at least comprise:
the invention can adapt to complex factors such as environmental temperature and the like in specific application scenes, ensures that the temperature rise of the charging circuit is in accordance with expectation, and avoids adverse effects caused by overhigh temperature. The charging device can ensure the charging efficiency of the product as much as possible and effectively control the temperature rise of the product in the charging process within a set range on the premise of adopting lower hardware cost and not occupying the space of a PCB.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a charging current control method based on temperature parameters according to the present invention;
fig. 2 is a structural diagram of a charging current control apparatus based on temperature parameters according to the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 is a general flowchart of a charging current control method based on temperature parameters according to an embodiment of the present invention. The method comprises the following steps:
s1: for the battery after complete discharge, charging the battery under a plurality of rated environment temperatures until the temperature value of the battery reaches a preset temperature rise limit value, and taking the temperature value of a charging circuit at the moment as a reference temperature rise point;
s2: for each environment temperature interval, calculating a charging current switching temperature threshold corresponding to the environment temperature interval by taking the reference temperature rise point as a reference, and obtaining a final charging current switching temperature threshold after margin calibration;
s3: for each environment temperature interval, determining a charging current value of which the temperature value of the charging circuit does not exceed the charging current switching temperature threshold value after charging for a preset time period through testing, and taking the charging current value as a temperature-controlled charging current value applicable to the environment temperature interval;
s4: charging at a first charging current value, and monitoring a temperature value of a charging circuit in real time;
s5: and when the temperature value of the charging circuit is judged to be more than or equal to the charging current switching temperature threshold value, switching to a temperature control charging current value corresponding to the environment temperature interval where the current environment temperature value is located for charging.
The following describes each step of the present embodiment in detail.
First, in step S1, the battery is completely discharged, and then charged at several rated environmental temperatures, so that the temperature value of the battery reaches the predetermined temperature rise limit, and the temperature value of the charging circuit at this time is measured as the reference temperature rise point.
Specifically, since the measurement of the charging circuit temperature value by the charging circuit temperature sensor is affected by the ambient temperature, in order to avoid errors, the battery in a fully discharged state is charged at each rated ambient temperature required by the product until the battery temperature value reaches a preset temperature rise limit value, and the current charging circuit temperature value is recorded as a corresponding value of the current temperature rise limit value, that is, the reference temperature rise point.
The nominal ambient temperature referred to herein may be selected from the three ranges of 25 deg.C, 35 deg.C, and 40 deg.C. And under the condition that the rated environment temperature is 25 ℃, recording the temperature value of the battery to reach a preset temperature rise limit value of 40 ℃, and recording the temperature value T1 of the charging circuit at the moment as a reference temperature rise point. And under the condition that the rated environment temperature is 35 ℃, recording the temperature value of the battery to reach a preset temperature rise limit value of 43 ℃, and recording the temperature value T2 of the charging circuit at the moment as a reference temperature rise point. And under the condition that the rated environment temperature is 40 ℃, recording the temperature value of the battery to reach a preset temperature rise limit value of 46 ℃, and recording the temperature value T3 of the charging circuit at the moment as a reference temperature rise point.
In step S2, the charging current switching temperature threshold corresponding to each ambient temperature zone is calculated with reference to the reference temperature increase point for that ambient temperature zone
And carrying out
After margin calibration, a final charging current switching temperature threshold value is obtained
Wherein
Is an ambient temperature value.
Wherein for the ambient temperature interval
Under the condition of not more than 25 ℃, calculating the charging current switching temperature threshold value by taking the corresponding reference temperature rise point T1 as reference
Is T1. Because the temperature value of the charging circuit is greater than or equal to the switching temperature threshold of the charging current, after the charging current is reduced, the temperature of the charging circuit can be short-time due to the inertia of temperature riseStill rising, so that a certain temperature rise margin is subtracted from the actually used charging current switching temperature threshold
。
The value of (c) can be set according to the test results, for example to 2 ℃. Therefore, under the condition that the environmental temperature interval is less than or equal to 25 ℃, the final charging current switching temperature threshold is
. For an ambient temperature range of 25 deg.C
At most 35 deg.C, calculating charging current switching temperature threshold with corresponding reference temperature rise points T1 and T2 as reference
=T1+（T2-T1）*
(ii) a The final charging current switching temperature threshold is
. For an ambient temperature range of 35 deg.C
At most 40 deg.C, calculating charging current switching temperature threshold with corresponding reference temperature rise points T2 and T3 as reference
=T2+（T3-T2）*
(ii) a The final charging current switching temperature threshold is
. For the ambient temperature interval
Calculating a charging current switching temperature threshold value by taking the corresponding reference temperature rise point T3 as reference at 40 DEG C
= T3, final charging current switching temperature threshold value
。
In step S3, for each environment temperature interval, a charging current value at which the temperature value of the charging circuit does not exceed the charging current switching temperature threshold after the charging is performed for a predetermined time is determined through a test, and is used as a temperature-controlled charging current value applicable to the environment temperature interval.
After the battery is completely discharged, in the above-mentioned various environmental temperature intervals
≤25℃、25℃
≤35℃、35℃
Respectively carrying out charging tests on the reference temperature rise points T1, T2 and T3 corresponding to each interval at the temperature of less than or equal to 40 ℃; in each charging test process, charging is carried out at a test charging current value, for example, a charging current value of 3C, and a charging test time length is set, for example, to half an hour; if the temperature of the charging circuit reaches the charging current switching temperature threshold during the charging test time period
Reducing the testing charging current value by one unit value, and then repeating the test after the battery is completely discharged again; until the temperature of the charging circuit does not exceed the charging current switching temperature threshold for the length of the charging test time
And taking the test charging current value as a preset temperature control charging current value in the environment temperature interval.
In step S4, at the stage of starting charging, if the battery temperature value does not enter the temperature interval suitable for large current charging, the charging is started with a preset initial charging current value, which is a preset small current, for example, 0.5C is adopted as the initial charging current value (for a battery, 1C is a current value required to fully charge the battery capacity in one hour, for example, the capacity of one battery is 4000mAh, and the charging current value of 1C for the battery is 4000 mA).
In addition, whether the temperature value of the battery is suitable for a temperature interval of large-current charging or not is monitored and judged in real time in the charging process, namely the temperature is more than 20 ℃ and less than or equal to 40 ℃; if the temperature is not in the temperature interval, continuously maintaining the initial charging current value for charging; if the temperature value of the battery enters a temperature interval which is greater than 20 ℃ and less than or equal to 40 ℃, the charging circuit is switched to adopt a first charging current value for charging. The first charging current value is a preset large current value, for example, 3C is adopted as the first charging current value, so that the charging efficiency is improved by the large charging current value.
And in the process of charging by using the first charging current value, monitoring in real time to obtain a charging circuit temperature value, and judging whether the charging circuit temperature value is greater than or equal to a charging current switching temperature threshold value corresponding to an environment temperature interval where the current environment temperature value is located or not by combining the current environment temperature value
. When the temperature value of the charging circuit is greater than or equal to the charging current switching temperature threshold value
Then, the charging is switched to the charging with the temperature-controlled charging current value.
As shown in fig. 2, the present invention also provides a charging current control apparatus based on temperature parameters, comprising: the charging circuit comprises a charging circuit, a charging circuit temperature sensor, an ambient temperature sensing component and a charging current temperature control module;
the charging circuit temperature sensor is used for monitoring the temperature value of the charging circuit in real time;
the environment temperature sensing component is used for obtaining a current environment temperature value;
the charging circuit is used for charging the battery by using a first charging current value and switching to a temperature control charging current value corresponding to an environment temperature interval in which a current environment temperature value is located to charge under the control of charging current temperature control;
the charging current temperature control module is used for obtaining a charging current switching temperature threshold value and an applicable temperature control charging current value for each environment temperature interval, and when the charging circuit temperature value is judged to be greater than or equal to the charging current switching temperature threshold value, the charging circuit is controlled to be switched to the temperature control charging current value corresponding to the environment temperature interval where the current environment temperature value is located for charging.
The temperature sensor of the charging circuit can adopt a temperature-sensitive resistor type temperature sensor, the resistance value of an NTC resistor of the temperature sensor is obviously reduced along with the temperature rise, so that the voltage value of an NTC resistor end is read, the current resistance value of the NTC resistor is converted according to the voltage value, and a temperature value corresponding to the resistance value is obtained through table lookup and is used as the temperature value of the charging circuit.
In an actual product, because the temperature rise of the battery is small and can be ignored when the battery is charged, the ambient temperature sensing component converts the battery temperature value through the resistance value of a temperature-sensitive resistor built in the battery to be used as the current ambient temperature value.
The charging current temperature control module charges the battery after complete discharge at a plurality of rated environmental temperatures until the temperature value of the battery reaches a preset temperature rise limit value, and the temperature value of the charging circuit at the moment is used as a reference temperature rise point; for each environment temperature interval, calculating a charging current switching temperature threshold corresponding to the environment temperature interval by taking the reference temperature rise point as a reference, and obtaining a final charging current switching temperature threshold after margin calibration; and for each environment temperature interval, the charging current temperature control module determines a charging current value of which the temperature value of the charging circuit does not exceed the charging current switching temperature threshold value after charging for a preset time period through testing, and the charging current value is used as a temperature control charging current value applicable to the environment temperature interval.
Preferably, the charging current temperature control module tests and obtains the temperature-controlled charging current value in the following way: for the battery after complete discharge, respectively carrying out a charging test aiming at the reference temperature rise point corresponding to each interval on each environment temperature interval; in each charging test process, charging is carried out according to the test charging current value, and the charging test time length is set; if the temperature of the charging circuit reaches the charging current switching temperature threshold value within the charging test time length, reducing the test charging current value by a preset amount, and then repeating the test after the battery is completely discharged again; and taking the test charging current value as the temperature control charging current value applicable to the environment temperature interval until the temperature of the charging circuit does not exceed the charging current switching temperature threshold value within the charging test time length.
When the temperature value of the battery does not enter a temperature interval suitable for large current, the charging current temperature control module controls the charging circuit to start charging at a preset initial charging current value; when the temperature value of the battery enters a preset temperature interval suitable for large current, the charging current temperature control module controls the charging circuit to be switched to adopt the first charging current value for charging; and when the temperature value of the charging circuit is judged to be larger than or equal to the charging current switching temperature threshold value, the charging circuit is controlled to be switched to a temperature control charging current value corresponding to the environment temperature interval where the current environment temperature value is located for charging.
Therefore, compared with the prior art, the invention can adapt to the complex factors such as the environmental temperature and the like in the specific application scene, ensure that the temperature rise of the charging circuit is in accordance with the expectation, and avoid the adverse effect caused by overhigh temperature. The charging device can ensure the charging efficiency of the product as much as possible and effectively control the temperature rise of the product in the charging process within a set range on the premise of adopting lower hardware cost and not occupying the space of a PCB.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A charging current control method based on temperature parameters is characterized by comprising the following steps:
for the battery after complete discharge, charging the battery under a plurality of rated environment temperatures until the temperature value of the battery reaches a preset temperature rise limit value, and taking the temperature value of a charging circuit at the moment as a reference temperature rise point;
for each environment temperature interval, calculating a charging current switching temperature threshold corresponding to the environment temperature interval by taking the reference temperature rise point as a reference, and obtaining a final charging current switching temperature threshold after margin calibration;
for each environment temperature interval, determining a charging current value of which the temperature value of the charging circuit does not exceed the charging current switching temperature threshold value after charging for a preset time period through testing, and taking the charging current value as a temperature-controlled charging current value applicable to the environment temperature interval;
charging with a first charging current value, and monitoring a temperature value of a charging circuit in real time, wherein the first charging current value is a preset large current value;
when the temperature value of the charging circuit is judged to be more than or equal to the charging current switching temperature threshold value, switching to a temperature control charging current value corresponding to the environment temperature interval where the current environment temperature value is located for charging;
wherein, the temperature-controlled charging current value is obtained by testing in the following way: for the battery after complete discharge, respectively carrying out a charging test aiming at the reference temperature rise point corresponding to each interval on each environment temperature interval; in each charging test process, charging is carried out according to the test charging current value, and the charging test time length is set; if the temperature of the charging circuit reaches the charging current switching temperature threshold value within the charging test time length, reducing the test charging current value by a preset amount, and then repeating the test after the battery is completely discharged again; and taking the test charging current value as the temperature control charging current value applicable to the environment temperature interval until the temperature of the charging circuit does not exceed the charging current switching temperature threshold value within the charging test time length.
2. The charging current control method according to claim 1, wherein when the battery temperature value does not enter a temperature interval suitable for a large current, the charging is started at a preset initial charging current value; and when the temperature value of the battery enters a preset temperature interval suitable for large current, switching to charging by adopting the first charging current value.
3. The charging current control method according to claim 1, wherein, in a case where the ambient temperature interval x is less than or equal to 25 ℃, the charging current switching temperature threshold f (x) is calculated as T1 with reference to a reference temperature rise point T1 corresponding to a nominal ambient temperature of 25 ℃; for the environmental temperature range of more than 25 ℃ and less than or equal to 35 ℃, the charging current switching temperature threshold is calculated by taking the reference temperature rise point T1 corresponding to the rated environmental temperature of 25 ℃ and the reference temperature rise point T2 corresponding to the rated environmental temperature of 35 ℃ as references
For the environment temperature range of more than 35 ℃ and less than or equal to 40 ℃, the charging current switching temperature threshold is calculated by taking the reference temperature rise point T2 corresponding to the rated environment temperature of 35 ℃ and the reference temperature rise point T3 corresponding to the rated environment temperature of 40 ℃ as references
For the ambient temperature interval x > 40 ℃ toThe charging current switching temperature threshold value f (x) is calculated to be T3 with reference to a reference temperature rise point T3 corresponding to the rated ambient temperature of 40 ℃.
4. A charging current control device based on temperature parameters, comprising: the charging circuit comprises a charging circuit, a charging circuit temperature sensor, an ambient temperature sensing component and a charging current temperature control module;
the charging circuit temperature sensor is used for monitoring the temperature value of the charging circuit in real time;
the environment temperature sensing component is used for obtaining a current environment temperature value;
the charging circuit is used for charging the battery by a first charging current value, the first charging current value is a preset large current value, and under the control of the charging current temperature control, the charging circuit is switched to a temperature control charging current value corresponding to an environment temperature interval where the current environment temperature value is located for charging;
the charging current temperature control module is used for acquiring a charging current switching temperature threshold value and an applicable temperature control charging current value for each environment temperature interval, and controlling the charging circuit to be switched to the temperature control charging current value corresponding to the environment temperature interval where the current environment temperature value is located for charging when the charging circuit temperature value is judged to be greater than or equal to the charging current switching temperature threshold value;
the charging current temperature control module charges the battery after complete discharge at a plurality of rated environmental temperatures until the temperature value of the battery reaches a preset temperature rise limit value, and the temperature value of the charging circuit at the moment is used as a reference temperature rise point; for each environment temperature interval, calculating a charging current switching temperature threshold corresponding to the environment temperature interval by taking the reference temperature rise point as a reference, and obtaining a final charging current switching temperature threshold after margin calibration; the charging current temperature control module determines a charging current value of which the temperature value of the charging circuit does not exceed the charging current switching temperature threshold value after charging for a preset time period through testing for each environment temperature interval, and the charging current value is used as a temperature control charging current value applicable to the environment temperature interval;
the charging current temperature control module tests and obtains the temperature control charging current value in the following way: for the battery after complete discharge, respectively carrying out a charging test aiming at the reference temperature rise point corresponding to each interval on each environment temperature interval; in each charging test process, charging is carried out according to the test charging current value, and the charging test time length is set; if the temperature of the charging circuit reaches the charging current switching temperature threshold value within the charging test time length, reducing the test charging current value by a preset amount, and then repeating the test after the battery is completely discharged again; and taking the test charging current value as the temperature control charging current value applicable to the environment temperature interval until the temperature of the charging circuit does not exceed the charging current switching temperature threshold value within the charging test time length.
5. The charging current control device according to claim 4, wherein when the temperature value of the battery does not enter a temperature range suitable for a large current, the charging current temperature control module controls the charging circuit to start charging at a preset initial charging current value; when the temperature value of the battery enters a preset temperature interval suitable for large current, the charging current temperature control module controls the charging circuit to be switched to adopt the first charging current value for charging.
6. The charging current control device according to claim 4, wherein the charging current switching temperature threshold value f (x) is calculated as T1 with reference to a reference temperature rise point T1 corresponding to a rated ambient temperature of 25 ℃ in the case where the ambient temperature interval x is equal to or less than 25 ℃; for the environmental temperature range of more than 25 ℃ and less than or equal to 35 ℃, the charging current switching temperature threshold is calculated by taking the reference temperature rise point T1 corresponding to the rated environmental temperature of 25 ℃ and the reference temperature rise point T2 corresponding to the rated environmental temperature of 35 ℃ as references
Obtaining the reference temperature rise according to the reference temperature rise point T2 corresponding to the rated environmental temperature 35 ℃ and the rated environmental temperature 40 ℃ when the environmental temperature range is more than 35 ℃ and less than or equal to 40 DEG CThe charging current switching temperature threshold is calculated with reference to the point T3
For an ambient temperature interval x > 40 ℃, the charging current switching temperature threshold value f (x) ═ T3 is calculated with reference to the corresponding reference temperature rise point T3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011109824A (en) * | 2009-11-18 | 2011-06-02 | Sharp Corp | Method for controlling charge, charge control computer program, device for controlling charge, secondary battery system, secondary battery power supply, and battery application device |
| CN104992052A (en) * | 2015-06-16 | 2015-10-21 | 北京亿利智慧能源科技有限公司 | Method for calculating maximum charging current of power lithium ion battery |
| CN107240937A (en) * | 2016-03-28 | 2017-10-10 | 中兴通讯股份有限公司 | The charging method and device of a kind of ferric phosphate lithium cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011109824A (en) * | 2009-11-18 | 2011-06-02 | Sharp Corp | Method for controlling charge, charge control computer program, device for controlling charge, secondary battery system, secondary battery power supply, and battery application device |
| CN104992052A (en) * | 2015-06-16 | 2015-10-21 | 北京亿利智慧能源科技有限公司 | Method for calculating maximum charging current of power lithium ion battery |
| CN107240937A (en) * | 2016-03-28 | 2017-10-10 | 中兴通讯股份有限公司 | The charging method and device of a kind of ferric phosphate lithium cell |
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| Title |
|---|
| 电动汽车用电池智能化快速充电研究;麻友良等;《武汉科技大学学报》;20100415(第02期);第108-111页 * |
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