CN213602431U - Lithium battery charging device - Google Patents
Lithium battery charging device Download PDFInfo
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- CN213602431U CN213602431U CN202022535254.7U CN202022535254U CN213602431U CN 213602431 U CN213602431 U CN 213602431U CN 202022535254 U CN202022535254 U CN 202022535254U CN 213602431 U CN213602431 U CN 213602431U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a lithium battery charging device relates to the lithium battery charging field, include: the lithium battery is connected with a charger and comprises: the first control chip is connected with the input end of a charging circuit, a first communication device and the output end of a first sampling circuit; the charging circuit is also connected with the input end of a single module; the output end of the single module is connected with the input end of the first sampling circuit; the charger includes: the second control chip is connected with the input end of a direct current output circuit and a second communication device; the output end of the direct current output circuit is connected with the input end of the charging circuit, and the second control chip outputs electric energy to the charging circuit by controlling the direct current output circuit. The utility model can charge the battery according to the charging information fed back by the battery and the current state output current and voltage of the charger, and ensure that the battery reaches saturation after being charged; and when the charging is finished, the full charge of the battery is corrected according to the charging current and the highest voltage of the single body.
Description
Technical Field
The utility model relates to a lithium battery charging field especially relates to a lithium battery charging device.
Background
At present, most lithium batteries in the market are charged in a two-stage mode, constant-current charging is firstly carried out, and after the voltage of the lithium batteries reaches a certain voltage value, constant-voltage charging is carried out. In addition, the traditional charging mode lacks information feedback between the charger and the lithium battery, the charger is difficult to identify the health state of the lithium battery, and the charger only controls the output of charging voltage and current according to the voltage of the lithium battery in the whole process so as to realize the starting and ending of charging. The charger is difficult to prevent from being used in a mixed mode in the charging process, when the lithium battery is abnormal, particularly under the conditions of BMS failure, abnormal temperature, over-discharge of the lithium battery, monomer over-charging and the like, the charger cannot judge the state of the lithium battery, and at the moment, the charging is very easy to cause danger.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a lithium battery charging device, include:
lithium cell connects a charger, the lithium cell includes:
the first control chip is respectively connected with the input end of a charging circuit, a first communication device and the output end of a first sampling circuit;
the first control chip sends first communication information to the charger through the first communication device to carry out communication;
the charging circuit is also connected with the input end of a single module, and the output end of the single module is connected with the input end of the first sampling circuit;
the charger includes:
the second control chip is respectively connected with the input end of a direct current output circuit and a second communication device;
the second control chip sends second communication information to the charger through the second communication device to carry out communication;
and the output end of the direct current output circuit is connected with the input end of the charging circuit.
Preferably, the charger further comprises a voltage transformation rectification and voltage stabilization circuit, the input end of the direct current output circuit is further connected with the output end of the voltage transformation rectification and voltage stabilization circuit, and the input end of the voltage transformation rectification and voltage stabilization circuit is connected with an externally input commercial power.
Preferably, the charger further comprises a second sampling circuit, the output end of the voltage transformation, rectification and voltage regulation circuit is further connected with the input end of the second sampling circuit, and the output end of the second sampling circuit is connected with the second control chip.
Preferably, the lithium battery further comprises an over-discharge repair circuit, an output end of the over-discharge repair circuit is connected with the first control chip, and an input end of the over-discharge repair circuit is connected with an output end of the voltage transformation rectification voltage stabilizing circuit.
Preferably, the lithium battery further comprises a first state display device, and the first state display device is connected with the first control chip.
Preferably, the first state display means includes: an LED light, and/or a buzzer.
Preferably, the charger further comprises a second state display device, and the second state display device is connected with the second control chip.
Preferably, the second state display device includes: an LED light, and/or a buzzer.
The technical scheme has the following advantages or beneficial effects:
(1) the pairing communication and fault monitoring between the lithium battery and the charger are realized, and the special purpose of the charger and the charging safety of the lithium battery are ensured;
(2) the charger outputs current and voltage to the lithium battery for charging according to the charging communication information fed back by the lithium battery and the current state of the charger, so that the lithium battery can reach a saturated state after being charged every time; and when the charging is finished, the lithium battery performs full-charge correction according to the charging current and the highest voltage of the single body.
(3) And activating the lithium battery in the over-discharge state to realize the repair of the lithium battery.
Drawings
Fig. 1 is a schematic structural diagram of a lithium battery charging device according to a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of a battery charging communication reference curve according to a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also belong to the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems existing in the prior art, there is provided a lithium battery charging device, as shown in fig. 1, including:
the first control chip 11 is respectively connected with an input end of a charging circuit 12, an output end of a first communication device 13 and an output end of a first sampling circuit 14;
the first control chip 11 sends a first communication message to the charger 2 through the first communication device 13 for communication;
the charging circuit 12 is further connected to an input end of a single module 16, and an output end of the single module 16 is connected to an input end of the first sampling circuit 14;
the charger 2 includes:
the second control chip 21 is respectively connected with the input end of the direct current output circuit 22 and a second communication device 23;
the second control chip 21 sends a second communication message to the charger 2 through the second communication device 23 for communication;
the output terminal of the dc output circuit 22 is connected to the input terminal of the charging circuit 12.
Specifically, in the present embodiment, the entire lithium Battery 1 charging device constitutes a Battery Management System (BMS). The charging process of the charging device for lithium batteries 1 mainly comprises: the method comprises the following steps of matching the lithium battery 1 with the charger 2, outputting a regulating process to the charger 2 in the charging process of the lithium battery 1, judging the charging end, correcting the full charge of the lithium battery 1 and displaying the abnormal charging fault.
When the lithium battery 1 is in a state to be charged or over-discharged, the charger 2 is not allowed to charge the lithium battery 1. After the charger 2 is connected with the lithium battery 1 and the power supply, the charging is started to match: (1) when the lithium battery 1 is in a state to be charged, the charger 2 sends an activation signal to activate the lithium battery 1, when the lithium battery 1 receives the activation signal of the charger 2, an activation feedback signal is generated and sent to the charger 2, when the model information of the lithium battery 1 in the activation feedback signal is successfully matched with the model information of the charger 2 in the activation signal, the lithium battery 1 and the charger 2 are successfully matched, and if the matching is unsuccessful, a first alarm prompt is given to give a fault alarm; (2) when the lithium battery 1 is in an over-discharge state, the lithium battery 1 receives an over-discharge activation signal of the charger 2, the first control chip 11 is activated, and the lithium battery 1 and the charger 2 start to communicate with each other. When the model information of the lithium battery 1 in the activation feedback signal and the model information of the charger 2 in the activation signal are successfully matched with each other, the lithium battery 1 and the charger 2 are successfully matched with each other, and the lithium battery 1 starts the charging circuit 12. The charger 2 then detects whether the voltage of the lithium battery 1 contained in the activation signal is within a reasonable range: if the current is within a reasonable range, the charger 2 outputs according to the activation feedback signal of the battery and starts to charge; and if the current is not in the reasonable range, giving a second alarm prompt, giving a fault alarm, and forbidding the lithium battery 1 to charge. In order to ensure the charging safety, the charger 2 and the battery have respective protection logics in the charging process, and the charger 2 and the battery realize mutual control under the action of communication.
After the lithium battery 1 is successfully matched with the charger 2, the lithium battery 1 sends the first communication information of the self charging state data to the charger 2, wherein the charging state data of the lithium battery 1 comprises: the maximum charging current and the maximum charging voltage allowed by the state of the lithium battery 1 at this time; the first communication information includes: the charging requirement of the lithium battery 1, the maximum current and the maximum voltage which are allowed to be output by the charger 2, the enable signal which allows the lithium battery 1 to be charged by the charger 2, the maximum voltage of the single battery and other charging-related information. After the lithium battery 1 sends the first communication information to the charger 2, the lithium battery 1 monitors second communication information containing charging output data sent by the charger 2 in real time. Wherein the charging output data includes: the charging voltage and the charging current detected by the first sampling circuit 14; the second communication information of the charger 2 includes: output voltage of the charger 2, output current, and enable of the charger 2. The lithium battery 1 then compares the charge output data of the charger 2 with the charge state data of the lithium battery 1. When the charging output data of the charger 2 is larger than the charging state data of the lithium battery 1, the first control chip 11 controls the charging circuit 12 to stop outputting; and further judging whether the charging state is normal or not when the charging output data of the charger 2 is not more than the charging state data of the lithium battery 1. When the charging state of the lithium battery 1 is normal, the first control chip 11 adjusts first communication information according to the real-time monomer maximum voltage of the lithium battery 1; the fault levels of the lithium battery comprise strong faults and weak faults, and when the charging state of the lithium battery 1 is abnormal, whether the lithium battery 1 has the strong faults or not is further judged. When the fault level of the lithium battery 1 reaches a strong fault, the first control chip 11 controls the charging circuit 12 to be closed, and sends the first communication information of the lithium battery 1 to the charger 2, so that the second control chip 21 in the charger 2 stops the output of the direct current output circuit 22, and the charging safety of the lithium battery 1 is ensured. When the fault level of the lithium battery 1 reaches a weak fault, the first control chip 11 further adjusts the maximum current allowed to be output by the charger 2 according to the safety factor corresponding to the weak fault and the real-time single maximum voltage of the lithium battery 1, and then enters a new cycle.
In the charging process, the charger 2 receives and analyzes the first communication information, and analyzes whether the lithium battery 1 sends the communication information of closing the charger 2: if not, the second control chip 21 outputs the current state of the charger 2 and the first communication information, and sends the second communication information of the charger 2 to the lithium battery 1; if the communication shutdown information of the charger 2 is transmitted, it is further determined whether the charger 2 is normal. When the charger 2 is judged to be normal, the second control chip 21 controls the direct current output circuit 22 to output corresponding voltage and current according to the data in the first communication information, and when the output current of the direct current output circuit 22 is required to be turned off (the output current is less than or equal to a set value, and the output current is the charging cut-off current), the second control chip 21 stops the output of the direct current output circuit 22, and sends the charger 2 turn-off communication information to the lithium battery 1. When the charger 2 is judged to be abnormal, processing is performed according to the fault level of the charger 2, wherein the fault level includes a strong fault and a weak fault, and the judgment condition of the fault level includes factors affecting charging safety, such as: the temperature of the charger 2, the charging output are abnormal, and the like. When the charger 2 has a weak fault, the charger 2 controls the output current and the output voltage of the direct current output circuit 22 according to the first communication information and the corresponding safety factor. The second control chip 21 determines whether charging is completed or not based on the output current and the output voltage of the dc output circuit 22, continues charging when it is determined that charging is not completed, and enters a new cycle. When the charger 2 has a strong fault, the second control chip 21 stops the output of the direct current output circuit 22 and sends a closing communication message of the charger 2 to the lithium battery 1. In summary, the conditions for stopping the output of the dc output circuit 22 and the sending of the first communication information by the charger 2 are that the lithium battery 1 sends the communication information that the charger 2 is turned off, the charger 2 has a strong fault, or the output current output by the dc output circuit 22 meets the turn-off requirement (the output current is less than or equal to the set value).
The accuracy of the judgment of the charging end of the lithium battery 1 is a critical factor for ensuring whether the lithium battery 1 is overcharged or not. In the technical scheme, the judgment basis of the charging mode charging end is the full-power correction completion state or the fault level of the charger 2. When the lithium battery 1 has a strong fault, the first control chip 11 controls the charging circuit 12 to be closed, and sends first communication information of the lithium battery 1 to the charger 2, so that the second control chip 21 in the charger 2 stops outputting by the direct current output circuit 22; when the charger 2 has a strong fault, the second control chip 21 stops the output of the direct current output circuit 22 and sends a closing communication message of the charger 2 to the lithium battery 1. The state of charge of the lithium battery 1 is the most intuitive embodiment for representing the current remaining capacity of the battery and for a user to judge whether the battery is fully charged. Because of the uniformity of the cell module 16, the cells of the lithium battery 1 are the most variedThe high voltage is different, and the technical scheme performs full charge correction on the charge state according to the highest voltage range of the single module 16 and the actually measured charging current of the lithium battery 1. At the charging end of the lithium battery 1, the highest voltage range of the unit cell is divided into three or more sections in order to prevent overcharge. Wherein the lower limit of the maximum voltage of the single battery is less than U1 and less than U2 and is less than the maximum voltage designed by the single battery, I2＞I1Charge cutoff current. The full charge correction method of the state of charge of the lithium battery 1 is as follows: when the actually measured highest voltage of the single body is not less than U1 and the actually measured charging current is not more than I1, performing full power correction until the full power correction is completed; when the measured highest voltage of the single body is not less than U1 and the measured charging current is greater than I1, continuous charging is carried out; when the measured cell highest voltage is not greater than U1, continuously charging until the measured cell highest voltage is not less than U2; when the actually measured highest voltage of the single body is not less than U2, judging whether the actually measured charging current is not more than I2, and when the actually measured charging current is not more than I2, performing full power correction until the full power correction is completed; judging whether the actually measured monomer highest voltage is not less than the monomer designed highest voltage or not when the actually measured charging current is greater than I2, and performing full-power correction until the full-power correction is completed when the actually measured monomer highest voltage is not less than the monomer designed highest voltage; and continuously charging when the measured maximum cell voltage is less than the maximum cell design voltage. When the full charge correction is completed, the first control chip 11 sends the charger 2 closing communication information to the charger 2, so that the second control chip 21 in the charger 2 stops outputting by the direct current output circuit 22, and the charging is finished.
And (3) displaying the charging abnormality fault: the charger 2 is provided with an indicator light, and when the charging of the battery is abnormal, the second communication information of the charger 2 contains all fault information. However, the indicator light only displays the first time a fault has occurred.
In a preferred embodiment, a 48V20Ah lithium battery 1 is adopted, the communication mode between the lithium battery 1 and the charger 2 is Controller Area Network (CAN), cell type ternary lithium 18650, the maximum voltage of a single battery is 4.2V (the maximum voltage of the single module 16 is 54.6V), the protection voltage of the single battery for discharging is 3V (the protection voltage of the single module 16 is 39V), the over-discharge voltage of the single battery is less than or equal to 2.75V (35.75V), U1 is 4.16V, U2 is 4.18V, I1 is 0.4A, I2 is 0.7A, and the normal charging temperature of the lithium battery 1 is: t1 is more than or equal to 2 ℃ and less than or equal to 50 ℃; the lithium battery 1 enters the temperature of a weak charging fault (the weak fault safety coefficient is 0.5): t2 is more than 50 ℃ and less than or equal to 55 ℃, T2 is more than or equal to-3 ℃ and less than 2 ℃; the lithium battery 1 enters a charging strong fault temperature: t3 < -3 ℃ and T3 > 55 ℃. The maximum charging current 10A allowed in the normal state of the lithium battery 1, the over-discharge activation signal of the lithium battery 1: a voltage signal of 12V.
The first communication information of the lithium battery 1 includes: ID 01: xx (charger 2 is enabled: 00 is turned on, 01 is turned off, 11 is failed to charge) xx (lithium battery 1 type code FF represents 48V lithium battery 1) xx (maximum voltage allowed to output) xx (maximum current allowed to output) xx (lithium battery 1 fault type: 00 is normal, 01 is weak fault, 10 is strong fault).
The charger 2, the set value of the charging cut-off current after the charging of the charger 2 is finished is 0.3A, and a voltage signal of 12V is connected to the charger 2 and is used for activating the over-discharge lithium battery 1. Normal charging temperature of charger 2: t1 is more than or equal to 0 ℃ and less than or equal to 65 ℃; the charger 2 enters a charging weak fault (weak fault safety factor 0.5) temperature: t2 is more than 65 ℃ and less than or equal to 100 ℃, T2 is more than or equal to-20 ℃ and less than 0 ℃; charger 2 enters a charging strong fault temperature: t3 ℃ < -20, T3 > 100 ℃. The state of the charger 2 is displayed by adopting an LED indicating lamp: the fault content is displayed by combining the red light flashing times and the length, the green light flashing indicates that the charger 2 is charged instead, and the green light is always on to indicate that the charger 2 is full.
The second communication information of the charger 2 includes: ID 02: xx (charger 2 enables: 00 is opened, 01 is closed, 11 is charged in a fault) xx (charger 2 type number EE represents 48V charger 2) xx (current charging voltage) xx (current charging current) xx (charger 2 fault type: 00 is normal, 01 is weak fault, 10 is strong fault) xx (charger 2 temperature) xx (fault mark: 00 is normal, 01 is hardware fault, 02 is over-high in internal temperature, 04 is over-high in external temperature, 08 is misconnection of lithium battery 1, 09 is communication receiving overtime, 10 is limited charging alarm of lithium battery 1, and the like).
The specific process of charging matching:
after the charger 2 is connected with the lithium battery 1, when the lithium battery 1 is normally undervoltage, after the lithium battery 1 receives an over-discharge activation signal sent by the charger 2, the first control chip 11 of the lithium battery 1 is activated to generate a feedback signal and send the feedback signal to the second control chip 21 of the charger 2, and meanwhile, the first control chip 11 analyzes whether the second communication information of the charger 2 meets the requirements of 48V charger 2 and no-fault charging prohibition, and the charging circuit 12 is started after the second communication information of the charger 2 meets the conditions. Meanwhile, the charger 2 analyzes whether the first communication information of the lithium battery 1 meets the requirements of 48V lithium battery 1 and no fault charging forbidding, and after the first communication information of the lithium battery 1 meets the conditions, the charger 2 starts to monitor that the voltage range of the lithium battery 1 meets 35.75V, U and 54.6V. And when the voltage range of the lithium battery 1 meets that U is more than 35.75V and less than or equal to 54.6V, the second control chip 21 controls the charger 2 to be matched with the lithium battery 1, and then charging is started. If the lithium battery 1 is over-discharged, the lithium battery 1 is activated by the voltage signal of 12V, and then the above-mentioned operation is performed.
The specific process of charging:
after the lithium battery 1 and the charger 2 are successfully matched, if the maximum voltage of the single body is 3V at the moment, as shown in fig. 2, the normal charging current at the moment can be obtained to be 4A according to a battery charging communication reference curve. When the state of the lithium battery 1 is normal, the lithium battery 1 sends the maximum output allowable voltage of 54.6V and the maximum output allowable current of 4A to the charger 2. When the state of the lithium battery 1 is abnormal: 1. when a strong fault occurs in the lithium battery 1, sending first communication information of charge forbidding in the fault to the charger 2, and simultaneously stopping the output of the charging circuit 12 by the lithium battery 1; 2. when the lithium battery 1 has a weak fault, the lithium battery 1 can adjust the maximum allowable input current to be 2A by combining with the safety factor of 0.5, and the maximum charging protection current is reduced to 5A. The charger 2 outputs according to the request, the lithium battery 1 monitors the output of the charger 2 in real time, and when the output of the charger 2 exceeds a charging protection value, the lithium battery 1 protects and stops the output of the charging circuit 12. When the charger 2 is abnormal: 1. when the charger 2 has a strong fault, the charger 2 closes the output of the direct current output circuit 22, and simultaneously sends a fault charging prohibition and fault mark, and at the moment, the indicating lamp reports the fault reason; 2. when the charger 2 has a weak fault, the charger 2 adjusts the output current to 2A according to the first communication information and the safety factor of the lithium battery 1.
End of charge and full charge correction of the lithium battery 1:
1. the maximum voltage of a single lithium battery 1 reaches 4.2V, the lithium battery 1 stops outputting by the direct current output circuit 22, the lithium battery 1 sends a charging closing signal to the charger 2, the charger 2 stops outputting (the charging enable is closed, the indicator light is turned into a green light and is normally on), meanwhile, the lithium battery 1 stops outputting by the charging circuit 12, and full-charge correction is completed;
2. when the lithium battery 1 enters the final charging stage, the highest voltage of the single body reaches 4.16V, and when the actually measured charging current of the lithium battery 1 is less than or equal to 0.4A, the lithium battery 1 sends a charging closing signal to the charger 2, the charger 2 stops outputting (the charging enable is closed, the indicator light is changed into a green light and is normally on), the lithium battery 1 stops outputting of the charging circuit 12, and full-charge correction is completed;
3. when the lithium battery 1 enters the final stage of charging, the highest voltage of a single body reaches 4.18V, and the actually measured charging current of the lithium battery 1 is less than or equal to 0.7A, the lithium battery 1 sends a charging closing signal to the charger 2, the charger 2 stops outputting (the charging enable is closed, the indicator light is changed into a green light and is normally on), the lithium battery 1 stops outputting of the charging circuit 12, and full-charge correction is completed;
4. when the charger 2 detects that the current output current of the charger 2 is less than or equal to 0.3A, the charger 2 sends a charging enable closing signal to the lithium battery 1, meanwhile, the indicating lamp is controlled to be changed into a green lamp to be normally on, the charger 2 stops outputting, the lithium battery 1 stops outputting of the charging circuit 12, and therefore the lithium battery 1 stops charging and full-charge correction is completed;
5. when the lithium battery 1 or the charger 2 has a strong fault or the matching is unsuccessful, the lithium battery 1 and the charger 2 stop the output of the charging circuit 12 and the direct current output circuit 22 respectively, and the charger 2 sends a fault to forbid the charging to the LED indicating lamp for displaying: and displaying fault content by combining the red light flashing times and the length to display.
The utility model discloses an in the preferred embodiment, charger 2 still includes a vary voltage rectification voltage stabilizing circuit 24, and a vary voltage rectification voltage stabilizing circuit 24's output is still connected to direct current output circuit 22's input, and the commercial power of external input is connected to vary voltage rectification voltage stabilizing circuit 24's input.
Specifically, in this embodiment, the voltage transformation, rectification and voltage stabilization circuit 24 transforms the mains power input from the outside into the voltage and current required by the dc output circuit 22, and further outputs the dc voltage and the dc current to the lithium battery 1 through the dc output circuit 22.
The utility model discloses an in the preferred embodiment, charger 2 still includes a second sampling circuit 25, and the input of second sampling circuit 25 is still connected to the output of vary voltage rectification voltage stabilizing circuit 24, and second control chip 21 is connected to the output of second sampling circuit 25.
Specifically, in the present embodiment, the voltage, the current and the temperature of the charger 2 are collected through the second sampling circuit 25, and then the collected data are fed back to the second control chip 21, and the second control chip 21 controls the output of the dc output circuit 22 in the charging process according to the data; when the battery module is in the overdischarge state, the voltage transformation rectification voltage stabilizing circuit 24 generates an overdischarge activation signal and sends the overdischarge activation signal to the overdischarge repair circuit 15, and the overdischarge repair circuit 15 activates the lithium battery 1 in the overdischarge state according to the overdischarge activation signal.
The utility model discloses an in the preferred embodiment, lithium cell 1 still includes an overdischarge repair circuit 15, and first control chip 11 is connected to the output of overdischarge repair circuit 15, and the output of vary voltage rectification voltage stabilizing circuit 24 is connected to the input of overdischarge repair circuit 15.
Specifically, in this embodiment, when the lithium battery 1 and the charger 2 are matched, if the lithium battery 1 is not activated, the second control chip 21 controls the voltage transformation, rectification and voltage stabilization circuit 24 to generate an overdischarge activation signal and send the overdischarge activation signal to the overdischarge repair circuit 15, and the overdischarge repair circuit 1 activates the first control chip 11 according to the overdischarge activation signal, so that the lithium battery 1 and the charger 2 are charged.
In the preferred embodiment of the present invention, the charger 2 further comprises a first status display device 17, and the first status display device 17 is connected to the first control chip 11.
Specifically, in the present embodiment, the first state display device 17 is used to display the charging state of the lithium battery 1.
In a preferred embodiment of the present invention, the first status display device 17 includes:
an LED light, and/or a buzzer.
Specifically, in the present embodiment, the LED lamp can display the charging state by changing the color and the blinking frequency of the LED lamp; the buzzer may characterize the charging state by the sound of the buzzer.
In the preferred embodiment of the present invention, the charger 2 further comprises a second status display device 26, and the second status display device 26 is connected to the second control chip 21.
Specifically, in the present embodiment, the second state display device 26 is used to display the state of the charger 2 during charging.
In the preferred embodiment of the present invention, the second status display device 26 includes:
an LED light, and/or a buzzer.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent and obvious changes made from the description and drawings should be included within the scope of the present invention.
Claims (8)
1. A lithium battery charging device, comprising:
lithium cell connects a charger, the lithium cell includes:
the first control chip is respectively connected with the input end of a charging circuit, a first communication device and the output end of a first sampling circuit;
the first control chip sends first communication information to the charger through the first communication device to carry out communication;
the charging circuit is also connected with the input end of a single module, and the output end of the single module is connected with the input end of the first sampling circuit;
the charger includes:
the second control chip is respectively connected with the input end of a direct current output circuit and a second communication device;
the second control chip sends second communication information to the charger through the second communication device to carry out communication;
and the output end of the direct current output circuit is connected with the input end of the charging circuit.
2. The lithium battery charging device of claim 1, wherein the charger further comprises a voltage transformation rectification and voltage stabilization circuit, the input terminal of the dc output circuit is further connected to the output terminal of the voltage transformation rectification and voltage stabilization circuit, and the input terminal of the voltage transformation rectification and voltage stabilization circuit is connected to an externally-inputted commercial power.
3. The lithium battery charging device of claim 2, wherein the charger further comprises a second sampling circuit, the output terminal of the voltage transformation, rectification and voltage regulation circuit is further connected to the input terminal of the second sampling circuit, and the output terminal of the second sampling circuit is connected to the second control chip.
4. The lithium battery charging device as claimed in claim 2, wherein the lithium battery further comprises an over-discharge repair circuit, an output end of the over-discharge repair circuit is connected with the first control chip, and an input end of the over-discharge repair circuit is connected with an output end of the voltage transformation, rectification and voltage regulation circuit.
5. The lithium battery charging device as claimed in claim 1, wherein the lithium battery further comprises a first status display device, and the first status display device is connected to the first control chip.
6. A lithium battery charging device as claimed in claim 5, characterized in that the first status display means comprise: an LED light, and/or a buzzer.
7. The lithium battery charging device as claimed in claim 1, wherein the charger further comprises a second status display device, the second status display device being connected to the second control chip.
8. A lithium battery charging apparatus as claimed in claim 7, characterized in that the second status display means comprises: an LED light, and/or a buzzer.
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| CN202022535254.7U CN213602431U (en) | 2020-11-05 | 2020-11-05 | Lithium battery charging device |
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| CN202022535254.7U CN213602431U (en) | 2020-11-05 | 2020-11-05 | Lithium battery charging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117578669A (en) * | 2023-11-29 | 2024-02-20 | 苏州赛芯电子科技股份有限公司 | Battery charging and discharging device, control method thereof and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578669A (en) * | 2023-11-29 | 2024-02-20 | 苏州赛芯电子科技股份有限公司 | Battery charging and discharging device, control method thereof and electronic equipment |
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