CN118381165B - Soft package lithium battery control system and mobile power supply according to-be-charged body matching voltage - Google Patents
Soft package lithium battery control system and mobile power supply according to-be-charged body matching voltage Download PDFInfo
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- CN118381165B CN118381165B CN202410807018.6A CN202410807018A CN118381165B CN 118381165 B CN118381165 B CN 118381165B CN 202410807018 A CN202410807018 A CN 202410807018A CN 118381165 B CN118381165 B CN 118381165B
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 246
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 246
- 230000000087 stabilizing effect Effects 0.000 claims description 45
- 238000012163 sequencing technique Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Abstract
The invention relates to the technical field of power supply devices, in particular to a soft package lithium battery control system and a mobile power supply according to matching voltage of a to-be-charged body, wherein the soft package lithium battery control system comprises an output interface, a control module, a voltage acquisition module and n soft package lithium batteries, wherein the soft package lithium batteries are connected with the output interface, and the control module is electrically connected with the output interface through the voltage acquisition module; the n soft package lithium batteries are sequentially connected in series, a control switch is respectively arranged between the two ends of each soft package lithium battery and the output interface, and a control switch is arranged between every two soft package lithium batteries; the control module works as follows: A. acquiring the working voltage of the body to be charged through a voltage acquisition module; B. matching a corresponding number of soft package lithium batteries according to the working voltage of the to-be-charged body; C. obtaining the current residual electric quantity of a plurality of soft package lithium batteries, and selecting the corresponding number of soft package lithium batteries with the highest residual electric quantity; D. and controlling the corresponding control switch to be conducted so that the power supply voltage of the battery pack is close to the working voltage of the body to be charged.
Description
Technical Field
The invention relates to the technical field of power supply devices, in particular to a soft package lithium battery control system and a mobile power supply according to matching voltage of a to-be-charged body.
Background
At present, portable electronic devices, such as mobile phones, tablet computers, notebook computers and the like, are indispensable articles for life and work of human beings, and because the electronic devices need to be powered, if the electronic devices are powered off, the electronic devices have great influence on traveling, work, eating and the like, so that a plurality of people can be provided with a mobile power supply for temporarily charging the electronic devices when going out for a long time and a charging socket is difficult to find.
The battery inside the mobile power supply is a soft package lithium battery, has the characteristics of good safety performance, small weight, large capacity, small internal resistance and the like, and can realize the capacity improvement through simple quantity superposition so as to facilitate design and customization.
However, the existing mobile power supply has the following disadvantages: the output voltage of the mobile power supply is usually fixed, for example, the working voltage of a smart phone, so that when the mobile power supply supplies power to a notebook computer, the output voltage of the mobile power supply is insufficient, and the mobile power supply cannot be reliably charged, so that the battery of the notebook computer is always in a low-charge high-output state, and the battery is adversely affected.
Although there are mobile power supplies with various output voltages, such mobile power supplies are usually provided with a plurality of interfaces outputting different voltages, which are inflexible to use and the error interfaces are also liable to cause damage caused by overcharge of the mobile phone battery.
Disclosure of Invention
The invention provides a soft package lithium battery control system and a mobile power supply according to the matching voltage of a to-be-charged body, aiming at the problems of the prior art, the soft package lithium battery control system and the mobile power supply can match the charging voltage according to the working voltage of the to-be-charged body, are flexible to use and can not cause damage to the battery of the to-be-charged body.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention provides a soft package lithium battery control system according to the matching voltage of a to-be-charged body, which comprises an output interface, n soft package lithium batteries, a control module and a voltage acquisition module, wherein the n soft package lithium batteries form a battery pack, the battery pack supplies power to the to-be-charged body outside through the output interface, and the control module is electrically connected with the output interface through the voltage acquisition module;
The n soft package lithium batteries are sequentially connected in series, a control switch is respectively arranged between the two ends of each soft package lithium battery and the output interface, and a control switch is arranged between every two soft package lithium batteries;
the control module works as follows:
A. Acquiring the working voltage of the body to be charged through a voltage acquisition module;
B. matching a corresponding number of soft package lithium batteries according to the working voltage of the to-be-charged body;
C. Obtaining the current residual electric quantity of a plurality of soft package lithium batteries, and selecting the corresponding number of soft package lithium batteries with the highest residual electric quantity;
D. controlling the corresponding control switch to be conducted so as to enable the power supply voltage of the battery pack to be close to the working voltage of the body to be charged;
wherein n is the number of soft package lithium batteries and n is a positive integer between 2 and 6.
Further, the control module is also connected with a plurality of electric quantity sensors, and the electric quantity sensors are correspondingly connected with the soft package lithium batteries one by one;
The working mode of the control module further comprises:
E. And monitoring the residual electric quantity of the selected soft package lithium battery through an electric quantity sensor, controlling the selected soft package lithium battery to be powered off when the residual electric quantity of the selected soft package lithium battery is lower than a preset value, and simultaneously, switching on the soft package lithium battery with the highest residual electric quantity among other soft package lithium batteries with an output interface.
Further, the step E specifically includes:
E1. acquiring the residual electric quantity Q n of all the soft package lithium batteries through an electric quantity sensor;
E2. According to the formula Calculating the average value of the residual electric quantity of all soft-package lithium batteries；
E3. Monitoring the residual capacity Q' m of each selected soft package lithium battery, and continuously adjusting according to the residual capacity change of the selected soft package lithium battery；
E4. when Q' m is less than or equal to kWhen the soft package lithium battery is selected, the soft package lithium battery with the highest residual electric quantity is selected from the unselected soft package lithium batteries, and the soft package lithium battery is controlled to be conducted with the output interface;
Wherein the value of m is the number of the selected soft package lithium batteries, m is a natural number, n is more than or equal to m, k is a constant, and k is more than or equal to 0.6 and less than or equal to 0.8.
Further, step E further includes E5: when the average value of the residual electric quantityWhen the total power of all the soft package lithium batteries is reduced to 20% of the full power average value, the selected soft package lithium batteries are controlled to continue discharging until the power of the selected soft package lithium batteries is exhausted, and then the soft package lithium batteries with the exhausted power are disconnected from the output interface; and switching the soft package lithium battery with the highest residual capacity in other soft package lithium batteries to be communicated with the output interface.
Further, the control module stores an average working voltage V' of all the soft-package lithium batteries;
The step B specifically comprises the following steps:
B1. the working voltage V of the body to be charged is obtained;
B2. calculating a value x according to x=v/V';
B3. and rounding the value x or further calculating m, wherein m is the number of the selected soft-package lithium batteries.
Further, the control switch comprises a triode and a diode, the soft package lithium battery is provided with a positive electrode end and a negative electrode end, the base electrode of the triode is connected with the control module, and the collector electrode of the triode is connected with the negative electrode of the diode or the emitter electrode of the triode is connected with the positive electrode of the diode.
Further, the control module is connected with a charging module, and the charging module is used for externally connecting a charging source and charging the battery pack through the externally connecting charging source;
the control module is also used for controlling the charging of the battery pack, and specifically comprises:
S1, externally connecting a charging power supply through a charging module;
s2, acquiring the residual electric quantity Q n of each soft-package lithium battery through an electric quantity sensor;
S3, sequencing the residual electric quantity of each soft package lithium battery from low to high, and sequentially charging each soft package lithium battery according to the sequence;
After the soft package lithium battery is charged, the total electric quantity of the soft package lithium battery is obtained through an electric quantity sensor and recorded.
Further, the control module controls the battery pack to charge, and further includes:
S0. obtaining the working state of each soft package lithium battery, and executing the steps S1-S3 if each lithium battery is not in the power supply state; if the soft package lithium battery in the power supply state exists, executing the steps S1, S2 and S4-S6;
S4, sequencing the soft package lithium batteries which are not in a power supply state from low to high according to the residual electric quantity, and sequentially charging the soft package lithium batteries according to the sequence;
S5, after the soft package lithium batteries which are not in the power supply state are charged, disconnecting the soft package lithium battery which is in the power supply state and has the lowest residual electric quantity from the output interface and then charging; selecting one of the soft package lithium batteries after the charging is completed and connecting with an output interface;
and S6, after all the soft package lithium batteries are charged, keeping the soft package lithium batteries in the current power supply state connected with the output interface until the residual electric quantity of the soft package lithium batteries in the current power supply state is reduced to 80%, and executing the step S5.
Further, the charging module comprises a voltage stabilizing module and a charging interface, the control module and the battery pack are both connected with the voltage stabilizing module, and the voltage stabilizing module is connected with the charging interface;
The voltage stabilizing module comprises a first voltage stabilizing circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit which are sequentially connected, wherein the first voltage stabilizing circuit is used for reducing the commercial power input by the charging interface into primary current and then transmitting the primary current to the second voltage stabilizing circuit; the second voltage stabilizing circuit is connected with the output interface and is used for reducing the primary current into secondary current and transmitting the secondary current to the output interface and/or the third voltage stabilizing circuit; the third voltage stabilizing circuit is used for charging the soft package lithium battery after the secondary current is reduced to three times of current, wherein the voltage of the three times of current and the working voltage of the soft package lithium battery are 0.9-1.1:1;
in step S0, when there are soft package lithium batteries in the power supply state, if the number of soft package lithium batteries in the power supply state is smaller than the total number of soft package lithium batteries, executing steps S1, S2, S4-S6, otherwise executing step S7;
S7, controlling the second voltage stabilizing circuit to be conducted with the output interface, and simultaneously controlling the third voltage stabilizing circuit to execute the steps S1-S3.
The invention also provides a mobile power supply, which comprises a shell and a power supply unit arranged on the shell, wherein the power supply unit comprises the soft package lithium battery control system.
The invention has the beneficial effects that: according to the invention, through the arrangement of the voltage acquisition module, the control module can acquire the working voltage of the battery to be charged after the output interface is connected with the battery to be charged, and the battery to be charged is charged according to the working voltage matched with the proper output voltage, so that the charging effect is ensured, and the damage to the battery to be charged is avoided.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic diagram of connection between a control module and a control switch according to the present invention.
Fig. 3 is a schematic diagram of another embodiment of the control switch of the present invention.
Reference numerals: 1-soft package lithium battery, 2-control switch, 3-triode, 4-diode and 5-output interface.
Detailed Description
The invention will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the invention. The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the soft package lithium battery control system according to the matching voltage of the to-be-charged body provided by the invention comprises an output interface 5, n soft package lithium batteries 1, a battery pack formed by the n soft package lithium batteries 1, a control module and a voltage acquisition module, wherein the battery pack is used for supplying power to the external to-be-charged body through the output interface 5, and the control module is electrically connected with the output interface 5 through the voltage acquisition module;
The n soft package lithium batteries 1 are sequentially connected in series, a control switch 2 is respectively arranged between two ends of each soft package lithium battery 1 and the output interface 5, and a control switch 2 is arranged between every two soft package lithium batteries 1;
the control module works as follows:
A. Acquiring the working voltage of the body to be charged through a voltage acquisition module;
B. matching a corresponding number of soft package lithium batteries 1 according to the working voltage of the body to be charged;
C. Obtaining the current residual electric quantity of a plurality of soft package lithium batteries 1, and selecting the corresponding number of soft package lithium batteries 1 with the highest residual electric quantity;
D. The corresponding control switch 2 is controlled to be conducted so that the power supply voltage of the battery pack is close to the working voltage of the body to be charged; specifically, the approaching means: the absolute value of the difference between the power supply voltage of the battery pack and the working voltage of the body to be charged is less than 10%, for example, when the working voltage of the body to be charged is 5V, the power supply voltage of the battery pack can be between 4.5V and 5.5V.
In practical use, the to-be-charged body is a battery of the electronic device, and the working voltage is the battery voltage or the working voltage or the charging voltage of the to-be-charged body. The working voltage of the soft package lithium battery 1 is 2.4-4.2V, the battery voltage of the mobile phone is 3.6-3.7V, and the battery voltage of the notebook computer is 10.8-14.4V. Namely, on the condition that the invention can flexibly charge various common electronic equipment, the number of the soft-package lithium batteries 1 is 3; considering the capacitance and the use, the number n of the soft-pack lithium batteries 1 in the embodiment is a positive integer between 3 and 6, i.e. the value of n may be 2 to 6 (2 is a case where charging of the notebook computer is not considered).
Taking the example that the number of the soft package lithium batteries 1 is 6, one soft package lithium battery 1 is needed to charge for the smart phone, and the total voltage of three soft package lithium batteries 1 is needed for the notebook computer to meet the charging requirement. If the output interface 5 is connected with the smart phone, the control module acquires the battery voltage of the smart phone to be 3.6V through the voltage acquisition module, the control module judges that only one soft package lithium battery 1 is needed to charge the smart phone, and then only the soft package lithium battery 1 with the highest residual electric quantity is needed to charge the smart phone; if the output interface 5 is connected with the notebook computer, the control module judges that three or four soft package lithium batteries 1 (according to the working voltage of the actual notebook computer) are required to be connected in series to meet the voltage of the notebook computer, and then the control module controls the three or four soft package lithium batteries 1 with the highest current residual electric quantity to be connected in series and then supply power, so that the function of flexibly outputting the voltage is realized.
In this embodiment, the control module is further connected with a plurality of electric quantity sensors, and the plurality of electric quantity sensors are connected with the plurality of soft package lithium batteries 1 in a one-to-one correspondence manner;
The working mode of the control module further comprises:
E. the residual electric quantity of the selected soft package lithium battery 1 is monitored through an electric quantity sensor, when the residual electric quantity of the selected soft package lithium battery 1 is lower than a preset value, the selected soft package lithium battery 1 is controlled to be powered off, and meanwhile, the soft package lithium battery 1 with the highest residual electric quantity among other soft package lithium batteries 1 is selected to be communicated with the output interface 5.
In actual use, the step E specifically includes:
E1. acquiring the residual electric quantity Q n of all the soft package lithium batteries 1 through an electric quantity sensor;
E2. According to the formula Calculating the average value of the residual electric quantity of all the soft-package lithium batteries 1；
E3. the residual capacity Q' m of each selected soft package lithium battery 1 is monitored and is continuously adjusted according to the residual capacity change of the selected soft package lithium battery 1；
E4. when Q' m is less than or equal to kWhen the soft package lithium battery 1 is selected, the soft package lithium battery 1 with the highest residual electric quantity is selected from the unselected soft package lithium batteries 1, and the soft package lithium battery 1 is controlled to be conducted with the output interface 5;
Wherein the value of m is the number of the selected soft package lithium batteries 1, m is a natural number, n is more than or equal to m, k is a constant, and k is more than or equal to 0.6 and less than or equal to 0.8.
The value of k can be set according to the mobile power supply to which the present invention is applied, and is generally in the range of 0.6 to 0.8. That is, when determining that the soft package lithium battery 1 for power supply is not always the soft package lithium battery 1 for power supply, but monitors the residual capacity of the soft package lithium battery 1 for power supply in real time, when the residual capacity is k times of the average capacity, the soft package lithium battery 1 with the highest current residual capacity is switched to replace the soft package lithium battery 1 for power supply, so that the residual capacities of all the soft package lithium batteries 1 are basically the same, namely, the service lives and the losses of all the soft package lithium batteries 1 are similar, and the management is easy.
Specifically, step E further includes E5: when the average value of the residual electric quantityWhen the average value of the full charge of all the soft package lithium batteries 1 is reduced to 20%, the selected soft package lithium batteries 1 are controlled to continue discharging until the electric quantity of the selected soft package lithium batteries 1 is exhausted, and then the soft package lithium batteries 1 with the exhausted electric quantity are disconnected from the output interface 5; and then switching the soft package lithium battery 1 with the highest residual capacity in the other soft package lithium batteries 1 to be communicated with the output interface 5.
According to the control of steps E1 to E4, if the average remaining power of all the soft-pack lithium batteries 1 is 20%, the power of all the soft-pack lithium batteries 1 is not high and is basically below 30%, and if steps E1 to E4 are still performed at this time, not only excessive power is wasted, but also unstable voltage due to frequent switching is caused. Therefore, when the residual electric quantity is low, the invention adopts the mode that the current soft package lithium battery 1 is completely discharged and then other soft package lithium batteries 1 are switched to supply power so as to maintain the voltage stable.
In addition, step E6. is further included, when the number of soft-pack lithium batteries 1 with the remaining capacity is smaller than the number of soft-pack lithium batteries 1 required by the to-be-charged voltage currently connected to the output interface 5, the control module controls all the control switches 2 to be turned off.
For example, when the invention supplies power to the notebook computer and the remaining two soft package lithium batteries 1 have electric quantity, the control module cuts off the control switches 2 of all the soft package lithium batteries 1, i.e. the invention does not supply power to the notebook computer in the current state, thereby avoiding the damage to the battery when the notebook computer is in a state of low electric quantity.
In the present embodiment, the control module stores the average operating voltage V' of all the soft-pack lithium batteries 1;
The step B specifically comprises the following steps:
B1. the working voltage V of the body to be charged is obtained;
B2. calculating a value x according to x=v/V';
B3. the value x is rounded or further calculated to form m, where m is the number of selected soft-pack lithium batteries 1.
For example, the voltage of the soft package lithium battery 1 is 3.7V, the battery operating voltage of the notebook computer is 10.8V, at this time, x=10.8/3.7 is approximately 2.919, and then the value of m is 3, that is, three soft package lithium batteries 1 are controlled to supply power.
For charging of a battery, it is often advantageous for the battery to have an actual voltage exceeding the charging voltage, and to have a lower charging voltage than the actual voltage, for example, the output voltage of a current cell phone charger is 5V. Therefore, the present invention preferably calculates m by using a further method on the value x to ensure that the voltage output by the to-be-charged body is not lower than the working voltage of the to-be-charged body, so as to ensure the charging effect.
In this embodiment, the control switch 2 includes a triode 3 and a diode 4, the soft-pack lithium battery 1 has a positive terminal and a negative terminal, the base of the triode 3 is connected to the control module, the collector of the triode 3 is connected to the negative terminal of the diode 4 or the emitter of the triode 3 is connected to the positive terminal of the diode 4.
Considering various combinations, the invention takes the number of soft-package lithium batteries 1 as four as an example, and the positions of the triodes 3 are required to be arranged as shown in fig. 2. Each transistor 3 is provided with a diode 4 to prevent reverse current flow, thereby ensuring the safety of the invention and the reliability of charging.
In this embodiment, the control module is connected with a charging module, and the charging module is used for externally connecting a charging source and charging the battery pack through the externally connected charging source;
the control module is also used for controlling the charging of the battery pack, and specifically comprises:
S1, externally connecting a charging power supply through a charging module;
s2, acquiring the residual electric quantity Q n of each soft-package lithium battery 1 through an electric quantity sensor;
S3, sequencing the residual electric quantity of each soft package lithium battery 1 from low to high, and sequentially charging each soft package lithium battery 1 according to the sequence;
after the soft package lithium battery 1 is charged, the total electric quantity of the soft package lithium battery 1 is obtained by an electric quantity sensor and recorded.
The voltage of the charging module for charging the battery pack is the charging voltage of the single soft-package lithium battery 1, so that a mode of charging the soft-package lithium batteries 1 one by one is adopted; the charging module can be internally provided with a quick charging protocol, so that the soft package lithium battery 1 can be fully charged in a short time.
Namely, in a charging state, the invention charges the soft package lithium battery 1 with low residual electric quantity preferentially; the total electric quantity of the soft package lithium battery 1 is reduced after the soft package lithium battery 1 is charged and discharged by a certain value, and the soft package lithium battery belongs to normal loss, so that the total electric quantity of the soft package lithium battery 1 is recorded after each charging is completed, and the old total electric quantity is replaced by the newly measured total electric quantity so as to update data in real time, so that the percentage of the residual electric quantity when the soft package lithium battery 1 is charged to a to-be-charged body is more accurate.
Of course, for simplifying management, the total electric quantity measured by each full charge can be changed into a record after each y full charges (y is a natural number greater than 1), and the electric quantity loss standard of the soft-packaged lithium battery 1 is set based on the standard of compliance after multiple full charges and discharges: for example, if the standard is that the total electric quantity is more than 90% of the total electric quantity after 100 times of complete charge and discharge, y in the present invention may be 5 times or 10 times.
Specifically, the control module controls the battery pack to charge, and further includes:
s0. obtaining the working state of each soft package lithium battery 1, and executing the steps S1-S3 if each lithium battery is not in the power supply state; if the soft package lithium battery 1 in the power supply state exists, executing the steps S1, S2 and S4-S6;
S4, sequencing the soft package lithium batteries 1 which are not in a power supply state from low to high according to the residual electric quantity, and sequentially charging the soft package lithium batteries 1 according to the sequence;
S5, after the soft package lithium batteries 1 which are not in the power supply state are charged, the soft package lithium batteries 1 which are in the power supply state and have the lowest residual electric quantity are disconnected with the output interface 5 and then charged; selecting one from the charged soft package lithium batteries 1 to be communicated with the output interface 5;
s6, after all the soft package lithium batteries 1 are charged, the soft package lithium batteries 1 in the current power supply state are kept to be connected with the output interface 5 until the residual electric quantity of the soft package lithium batteries 1 in the current power supply state is reduced to 80%, and the step S5 is executed.
That is, there is a case in which a user charges the present invention while charging the electronic device through the present invention, so as to overcome the problem of simultaneously charging a plurality of bodies with only one charger.
Because the charging voltage of the charging module is the power supply voltage of the single soft package lithium battery 1, the charging module rapidly charges the single soft package lithium battery 1 and simultaneously charges the to-be-charged body through other soft package lithium batteries 1, thereby avoiding the short service life caused by simultaneous charging and discharging of the soft package lithium batteries 1.
In addition, when all the soft pack lithium batteries 1 of the present invention are in a state of charge exhaustion and the output interface 5 is connected to the body to be charged, the following manner is adopted for charging:
The charging module sequentially charges the soft-package lithium batteries 1 according to the sequence of the soft-package lithium batteries 1;
when the electric quantity of one soft package lithium battery 1 reaches j, switching to charge the next soft package lithium battery 1;
When the number of the soft package lithium batteries 1 with the electric quantity j meets the number of the soft package lithium batteries 1 required by the body to be charged, the body to be charged is charged through the soft package lithium batteries 1, and then the steps S1-S3 are executed, so that the soft package lithium batteries 1 are ensured to be charged under the healthy state, the loss of the soft package lithium batteries 1 is reduced, and the service life of the soft package lithium batteries is prolonged.
Wherein, the value range of j is 80-90%, and the electric quantity reaches the meaning of j: the ratio of the electric quantity of the soft-packed lithium battery 1 to the total electric quantity thereof is j.
In this embodiment, the charging module includes a voltage stabilizing module and a charging interface, the control module and the battery pack are both connected to the voltage stabilizing module, and the voltage stabilizing module is connected to the charging interface;
The voltage stabilizing module comprises a first voltage stabilizing circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit which are sequentially connected, wherein the first voltage stabilizing circuit is used for reducing the commercial power input by the charging interface into primary current and then transmitting the primary current to the second voltage stabilizing circuit; the second voltage stabilizing circuit is connected with the output interface 5 and is used for reducing the primary current into secondary current and transmitting the secondary current to the output interface 5 and/or the third voltage stabilizing circuit; the third voltage stabilizing circuit is used for charging the soft package lithium battery 1 after the secondary current is reduced to three times of current, wherein the voltage of the three times of current and the working voltage of the soft package lithium battery 1 are 0.9-1.1:1;
In step S0, when there are soft-pack lithium batteries 1 in the power supply state, if the number of soft-pack lithium batteries 1 in the power supply state is smaller than the total number of soft-pack lithium batteries 1, executing steps S1, S2, S4-S6, otherwise executing step S7;
s7, controlling the second voltage stabilizing circuit to be conducted with the output interface 5, and simultaneously controlling the third voltage stabilizing circuit to execute the steps S1-S3.
Namely, for the extreme case that all the soft package lithium batteries 1 to be charged need to be connected in series and then the working voltage can be reached, the invention directly charges the to-be-charged body through the second voltage stabilizing circuit, and meanwhile, the steps S1-S3 are executed through the third voltage stabilizing circuit, so that the charging of the to-be-charged body and the charging of the soft package lithium batteries 1 are not in conflict, and the extreme case is overcome.
In order to simplify the charging module, the charging module only outputs the current of two voltages, and the second voltage stabilizing circuit is prevented from directly outputting the charging current as far as possible, so that the charging module is safer.
The mobile power supply comprises a shell and a power supply unit arranged on the shell, wherein the power supply unit comprises the soft package lithium battery 1 control system, so that the mobile power supply is more intelligent and flexible, the use experience of a user is improved, and the health state of a to-be-charged body is ensured.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that the present invention is not limited thereto, and that the invention is not limited thereto, but is intended to be limited thereto, when the technical content disclosed above is utilized to make a little change or modification into equivalent embodiments of equivalent changes, but the technical content of the invention is not deviated from, any simple modification, equivalent changes and modification of the above embodiments are all within the scope of the technical solution of the invention.
Claims (8)
1. The utility model provides a soft packet of lithium cell control system according to waiting to fill body matching voltage, includes output interface and n soft packet of lithium cell, and n soft packet of lithium cell constitute group battery, and the group battery is through the output interface to external waiting to fill body power supply, its characterized in that: the control module is electrically connected with the output interface through the voltage acquisition module;
The n soft package lithium batteries are sequentially connected in series, a control switch is respectively arranged between the two ends of each soft package lithium battery and the output interface, and a control switch is arranged between every two soft package lithium batteries;
the control module works as follows:
A. Acquiring the working voltage of the body to be charged through a voltage acquisition module;
B. matching a corresponding number of soft package lithium batteries according to the working voltage of the to-be-charged body;
C. Obtaining the current residual electric quantity of a plurality of soft package lithium batteries, and selecting the corresponding number of soft package lithium batteries with the highest residual electric quantity;
D. controlling the corresponding control switch to be conducted so as to enable the power supply voltage of the battery pack to be close to the working voltage of the body to be charged;
wherein n is the number of soft-package lithium batteries and n is a positive integer between 2 and 6;
the control module is also connected with a plurality of electric quantity sensors, and the electric quantity sensors are correspondingly connected with the soft package lithium batteries one by one;
The working mode of the control module further comprises:
E. Monitoring the residual electric quantity of the selected soft package lithium battery through an electric quantity sensor, controlling the selected soft package lithium battery to be powered off when the residual electric quantity of the selected soft package lithium battery is lower than a preset value, and simultaneously, selecting the soft package lithium battery with the highest residual electric quantity from other soft package lithium batteries to be connected with an output interface;
The step E specifically comprises the following steps:
E1. acquiring the residual electric quantity Q n of all the soft package lithium batteries through an electric quantity sensor;
E2. According to the formula Calculating the average value of the residual electric quantity of all soft-package lithium batteries；
E3. Monitoring the residual capacity Q' m of each selected soft package lithium battery, and continuously adjusting according to the residual capacity change of the selected soft package lithium battery；
E4. when Q' m is less than or equal to kWhen the soft package lithium battery is selected, the soft package lithium battery with the highest residual electric quantity is selected from the unselected soft package lithium batteries, and the soft package lithium battery is controlled to be conducted with the output interface;
wherein the value of m is the number of the selected soft-package lithium batteries, m is a natural number, n is more than or equal to m, k is a constant and is more than or equal to 0.6 and less than or equal to 0.8, i is a natural number and is more than or equal to 0 and less than or equal to n.
2. The soft pack lithium battery control system according to the matching voltage of the to-be-charged body of claim 1, wherein: step E further comprises E5: when the average value of the residual electric quantityWhen the total power of all the soft package lithium batteries is reduced to 20% of the full power average value, the selected soft package lithium batteries are controlled to continue discharging until the power of the selected soft package lithium batteries is exhausted, and then the soft package lithium batteries with the exhausted power are disconnected from the output interface; and switching the soft package lithium battery with the highest residual capacity in other soft package lithium batteries to be communicated with the output interface.
3. The soft pack lithium battery control system according to the matching voltage of the to-be-charged body of claim 1, wherein: the control module stores the average working voltage V' of all the soft-package lithium batteries;
The step B specifically comprises the following steps:
B1. the working voltage V of the body to be charged is obtained;
B2. calculating a value x according to x=v/V';
B3. and rounding the value x or further calculating m, wherein m is the number of the selected soft-package lithium batteries.
4. The soft pack lithium battery control system according to the matching voltage of the to-be-charged body of claim 1, wherein: the control switch comprises a triode and a diode, the soft package lithium battery is provided with a positive electrode end and a negative electrode end, the base electrode of the triode is connected with the control module, and the collector electrode of the triode is connected with the negative electrode of the diode or the emitter electrode of the triode is connected with the positive electrode of the diode.
5. The soft pack lithium battery control system according to the matching voltage of the to-be-charged body of claim 1, wherein: the control module is connected with a charging module, and the charging module is used for externally connecting a charging source and charging the battery pack through the externally connected charging source;
the control module is also used for controlling the charging of the battery pack, and specifically comprises:
S1, externally connecting a charging power supply through a charging module;
s2, acquiring the residual electric quantity Q n of each soft-package lithium battery through an electric quantity sensor;
S3, sequencing the residual electric quantity of each soft package lithium battery from low to high, and sequentially charging each soft package lithium battery according to the sequence;
After the soft package lithium battery is charged, the total electric quantity of the soft package lithium battery is obtained through an electric quantity sensor and recorded.
6. The soft pack lithium battery control system according to the matching voltage of the to-be-charged body of claim 5, wherein: the control module controls the battery pack to charge, and further comprises:
S0. obtaining the working state of each soft package lithium battery, and executing the steps S1-S3 if each lithium battery is not in the power supply state; if the soft package lithium battery in the power supply state exists, executing the steps S1, S2 and S4-S6;
S4, sequencing the soft package lithium batteries which are not in a power supply state from low to high according to the residual electric quantity, and sequentially charging the soft package lithium batteries according to the sequence;
S5, after the soft package lithium batteries which are not in the power supply state are charged, disconnecting the soft package lithium battery which is in the power supply state and has the lowest residual electric quantity from the output interface and then charging; selecting one of the soft package lithium batteries after the charging is completed and connecting with an output interface;
and S6, after all the soft package lithium batteries are charged, keeping the soft package lithium batteries in the current power supply state connected with the output interface until the residual electric quantity of the soft package lithium batteries in the current power supply state is reduced to 80%, and executing the step S5.
7. The soft pack lithium battery control system according to the matching voltage of the to-be-charged body of claim 6, wherein: the charging module comprises a voltage stabilizing module and a charging interface, the control module and the battery pack are both connected with the voltage stabilizing module, and the voltage stabilizing module is connected with the charging interface;
The voltage stabilizing module comprises a first voltage stabilizing circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit which are sequentially connected, wherein the first voltage stabilizing circuit is used for reducing the commercial power input by the charging interface into primary current and then transmitting the primary current to the second voltage stabilizing circuit; the second voltage stabilizing circuit is connected with the output interface and is used for reducing the primary current into secondary current and transmitting the secondary current to the output interface and/or the third voltage stabilizing circuit; the third voltage stabilizing circuit is used for charging the soft package lithium battery after the secondary current is reduced to three times of current, wherein the voltage of the three times of current and the working voltage of the soft package lithium battery are 0.9-1.1:1;
in step S0, when there are soft package lithium batteries in the power supply state, if the number of soft package lithium batteries in the power supply state is smaller than the total number of soft package lithium batteries, executing steps S1, S2, S4-S6, otherwise executing step S7;
S7, controlling the second voltage stabilizing circuit to be conducted with the output interface, and simultaneously controlling the third voltage stabilizing circuit to execute the steps S1-S3.
8. A mobile power supply, characterized in that: comprising a housing and a power supply unit arranged in the housing, the power supply unit comprising the soft pack lithium battery control system according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410807018.6A CN118381165B (en) | 2024-06-21 | Soft package lithium battery control system and mobile power supply according to-be-charged body matching voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410807018.6A CN118381165B (en) | 2024-06-21 | Soft package lithium battery control system and mobile power supply according to-be-charged body matching voltage |
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| CN118381165B true CN118381165B (en) | 2024-11-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117595449A (en) * | 2023-11-29 | 2024-02-23 | 芯元(常州)微电子科技有限公司 | Charging and discharging control device, charging control method and discharging control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117595449A (en) * | 2023-11-29 | 2024-02-23 | 芯元(常州)微电子科技有限公司 | Charging and discharging control device, charging control method and discharging control method |
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