CN107650686B - Dual protection circuit of balance car battery and protection method thereof - Google Patents
Dual protection circuit of balance car battery and protection method thereof Download PDFInfo
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- CN107650686B CN107650686B CN201711112294.7A CN201711112294A CN107650686B CN 107650686 B CN107650686 B CN 107650686B CN 201711112294 A CN201711112294 A CN 201711112294A CN 107650686 B CN107650686 B CN 107650686B
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- 238000000034 method Methods 0.000 title claims description 21
- 230000009977 dual effect Effects 0.000 title claims description 13
- 238000007599 discharging Methods 0.000 claims abstract description 28
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 230000009191 jumping Effects 0.000 claims description 36
- MKGHDZIEKZPBCZ-ULQPCXBYSA-N methyl (2s,3s,4r,5r,6r)-4,5,6-trihydroxy-3-methoxyoxane-2-carboxylate Chemical compound CO[C@H]1[C@H](O)[C@@H](O)[C@H](O)O[C@@H]1C(=O)OC MKGHDZIEKZPBCZ-ULQPCXBYSA-N 0.000 claims 7
- 230000000694 effects Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The circuit comprises a first protection module IC and a second protection module MCU, wherein the first discharge control switch and the second discharge control switch are connected in series in a battery main loop, the first protection module IC acquires real-time discharge working parameters of the battery, and when the real-time discharge working parameters are abnormal, the first protection module IC1 controls the first discharge control switch to be disconnected; the second protection module MCU acquires the real-time discharge working parameters of the first protection module IC1 in real time, compares the real-time discharge working parameters with the standard discharge working parameters preset by the second protection module MCU, and controls the second discharge control switch when the discharge real-time parameters exceed the preset discharge working parameters. The invention has the advantage of double independent control of the main loop in both charging and discharging.
Description
Technical Field
The invention relates to a double protection circuit of a balance car battery and a protection method thereof.
Background
All balance cars produced, imported and sold must meet safety standards which clearly suggest that the battery overcharge, overdischarge, overcurrent and overtemperature require dual mutually independent protection mechanisms. All balance car products which do not meet the standards have potential fire risks in use, and serious personal injury or life and property threatening safety can be brought to consumers.
The battery protection scheme of the traditional balance car is mostly a pure hardware circuit scheme, which is realized by adopting double protection ICs, and the pure hardware circuit has the defect that the information of the battery cannot be effectively fed back to the main control board in real time, so that the protection effect cannot be effectively realized when the abnormal situation occurs to the extremely individual battery. In order to improve the situation, a scheme of adding a main protection module MCU to an auxiliary protection module IC is proposed, for example, chinese patent document CN103490390 discloses a battery management system and method with dual protection function, which includes an analog front-end IC control switch circuit and an MCU control switch circuit, where the analog front-end IC control switch circuit correspondingly controls a first MOS transistor and the MCU control switch circuit correspondingly controls a second MOS transistor, and then the first MOS transistor or the second MOS transistor controls a main discharge loop through a third MOS transistor, so as to achieve the purpose of protecting a battery. The problem of this kind of battery management system is, once the third MOS pipe is lost efficacy, does not receive the control of first MOS pipe or second MOS pipe, then whole control circuit just lost efficacy, plays no protection effect. The protection requirement in the main loop in the new standard is not met, namely, a double independent control loop is needed, once the MOS tube in the main loop fails, the other protection MOS tube can also independently play a role in protection, and the purpose of double protection is truly realized.
Disclosure of Invention
In order to overcome the problems, the invention provides a double protection circuit and a protection method for a balance car battery, which can control a main loop in a double independent way.
The technical scheme of the invention is as follows: the double protection circuit of the balance car battery comprises a first protection module IC and a second protection module MCU, wherein the first discharge control switch and the second discharge control switch are connected in series in a battery main loop, the first protection module IC acquires real-time discharge working parameters of the battery, and when the real-time discharge working parameters are abnormal, the first protection module IC1 controls the first discharge control switch to be disconnected; the second protection module MCU acquires the real-time discharge working parameters of the first protection module IC1 in real time, compares the real-time discharge working parameters with the standard discharge working parameters preset by the second protection module MCU, and controls the second discharge control switch when the discharge real-time parameters exceed the preset discharge working parameters.
As an improvement of the invention, the second protection module MCU acquires the real-time working parameters of the first protection module IC in real time, compares the real-time working parameters with the standard discharge working parameters preset by the second protection module MCU, and controls the second discharge control switch when the discharge real-time parameters exceed the preset discharge working parameters and the first discharge control switch is closed.
As an improvement of the invention, the battery protection device further comprises a first charging control switch and a second charging control switch, wherein the first charging control switch and the second charging control switch are connected in series in a battery main loop, the first protection module IC obtains real-time charging working parameters of the battery, and when the real-time charging working parameters are abnormal, the first protection module IC controls the first charging control switch to be disconnected; the second protection module MCU acquires real-time charging working parameters of the first protection module IC in real time, compares the real-time charging working parameters with standard charging working parameters preset by the second protection module MCU, and controls the second charging control switch when the charging real-time parameters exceed the preset charging working parameters.
As an improvement of the invention, the second protection module MCU acquires the real-time charging working parameter of the first protection module IC in real time, compares the real-time charging working parameter with the standard charging working parameter preset by the second protection module MCU, and controls the second charging control switch when the charging real-time parameter exceeds the preset charging working parameter and the first charging control switch is closed.
As an improvement of the invention, the first discharge control switch and the second discharge control switch are MOS transistors.
As an improvement of the invention, the MOS tube is an N-type MOS tube or a P-type MOS tube.
As an improvement of the invention, the first charge control switch and the second charge control switch are MOS transistors.
As an improvement of the invention, the MOS tube is an N-type MOS tube or a P-type MOS tube.
As an improvement to the present invention, the real-time discharge operation parameter includes one of voltage, current and temperature; or the real-time discharge operating parameters include one or more of voltage, current and temperature.
As an improvement to the present invention, the real-time charging operation parameter includes one of voltage, current and temperature; or the real-time charging operation parameter includes one or more of voltage, current and temperature.
The invention also provides a double protection method of the balance car battery, which comprises a first protection module IC and a second protection module MCU, wherein the second protection module MCU (2) controls the MOS tube according to the following steps;
s1, starting power-on;
s2, setting a flag bit for opening a charge/discharge MOS tube;
s3, whether the battery state position is in a sleep mode or not, if so, jumping to the step S6, and if not, entering the next step;
s4, whether the battery state position is short-circuited or not, if so, jumping to the step S6, and if not, entering the next step;
s5, if the battery state position is in the discharge overcurrent state, the step S6 is entered, and if not, the step S7 is skipped;
s6, disconnecting the charge/discharge MOS tube;
s7, whether the battery state position is over-charged or not, if so, jumping to the step S10, and if not, entering the next step;
s8, if the battery state position is high in charging temperature, jumping to the step S10, and if not, entering the next step;
s9, if the battery state position is low in charging temperature, entering a step S10, and if not, jumping to a step 11;
s10, if the battery state position is set to be charged, entering a step S12, and if not, entering a step S14;
s11, if the battery state position is in the charging overcurrent state, jumping to the step S14, and if not, entering the next step;
s12, closing a charge/discharge MOS tube;
s13, if the battery state position is set to be over-placed, jumping to the step S16, and if not, entering the step 15;
s14, opening charging and closing discharging;
s15, whether a key request exists or not,
s16, if the battery state position is in charge, jumping to the step S18, and if not, jumping to the step 19;
s17, if the battery state position is low in discharge temperature, jumping to the step S21, and if not, jumping to the step 20;
s18, closing a charge/discharge MOS tube;
s19, closing a charging MOS tube and opening a discharging MOS tube;
s20, if the battery state position is high in discharge temperature, entering a step S21, and if not, jumping to a step 22;
s21, disconnecting the charge/discharge MOS tube;
s22, ending.
The invention has the advantage of double independent control of the main loop in both charging and discharging.
Drawings
Fig. 1 is a schematic plan view of a first embodiment of the present invention.
Fig. 2 is a flow chart (upper part) of the control method of the MCU of the present invention.
Fig. 3 is a flow chart of the control method of the MCU of the present invention (see fig. 2).
Detailed Description
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or component to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of the two components. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention.
Referring to fig. 1, fig. 1 discloses a dual protection circuit of a balance car battery, which comprises a first protection module IC1 and a second protection module MCU2, a first discharge control switch 3 and a second discharge control switch 4, wherein the first discharge control switch 3 and the second discharge control switch 4 are connected in series in a battery main loop, the first protection module IC1 obtains a real-time discharge working parameter of the battery 7, and when the real-time discharge working parameter is abnormal, the first protection module IC1 controls the first discharge control switch 3 to be disconnected; the second protection module MCU2 obtains the real-time discharge working parameters of the first protection module IC1 in real time, compares the real-time discharge working parameters with the standard discharge working parameters preset by the second protection module MCU2, and when the discharge real-time parameters exceed the preset discharge working parameters, the second protection module MCU2 controls the second discharge control switch 4 to be turned off. Typically, the real-time discharge operating parameter may be one of voltage, current and temperature; or more than one of voltage, current and temperature, such as two or three.
Preferably, the second protection module MCU2 acquires the real-time working parameter of the first protection module IC1 in real time, compares the real-time working parameter with the standard discharge working parameter preset by the second protection module MCU2, and when the discharge real-time parameter exceeds the preset discharge working parameter, and the first discharge control switch 3 is closed, the second protection module MCU2 controls the second discharge control switch 4. In this case, when the discharge operation parameter is abnormal, but the first discharge control switch 3 is closed, the second protection module MCU2 controls the second discharge control switch 4 to be opened.
Preferably, the invention further comprises a first charging control switch 5 and a second charging control switch 6, wherein the first charging control switch 5 and the second charging control switch 6 are connected in series in a battery main loop, the first protection module IC1 acquires real-time charging working parameters of the battery 7, and when the real-time charging working parameters are abnormal, the first protection module IC1 controls the first charging control switch 5 to be disconnected; the second protection module MCU2 obtains the real-time charging working parameters of the first protection module IC1 in real time, compares the real-time charging working parameters with the standard charging working parameters preset by the second protection module MCU2, and when the charging real-time parameters exceed the preset charging working parameters, the second protection module MCU2 controls the second charging control switch 6 to be turned off.
Preferably, the second protection module MCU2 acquires the real-time charging operation parameter of the first protection module IC1 in real time, compares the real-time charging operation parameter with the standard charging operation parameter preset by the second protection module MCU2, and when the charging real-time parameter exceeds the predetermined charging operation parameter, and the first charging control switch 5 is closed, the second protection module MCU2 controls the second charging control switch 6 to be opened.
Preferably, the first discharging control switch 3, the second discharging control switch 4, the first charging control switch 5 and the second charging control switch 6 are MOS transistors. The MOS tube can be an N-type MOS tube or a P-type MOS tube.
Preferably, the real-time charging operation parameter includes one of voltage, current and temperature; or the real-time charging operation parameter includes one or more of voltage, current and temperature.
The invention can also be designed into a double protection circuit of the balance car battery, which comprises a first protection module IC1 and a second protection module MCU2, a first charge control switch 5 and a second charge control switch 6, wherein the first charge control switch 5 and the second charge control switch 6 are connected in series in a battery main loop, the first protection module IC1 acquires real-time charge working parameters of the battery 7, and when the real-time charge working parameters are abnormal, the first protection module IC1 controls the first charge control switch 5 to be disconnected; the second protection module MCU2 obtains the real-time charging working parameters of the first protection module IC1 in real time, compares the real-time charging working parameters with the standard charging working parameters preset by the second protection module MCU2, and when the charging real-time parameters exceed the preset charging working parameters, the second protection module MCU2 controls the second charging control switch 6 to be turned off.
In this case, the structure in which the first discharge control switch 3 and the second discharge control switch 4 are connected in series in the battery main circuit may also be added to improve such an embodiment, and the detailed structure will be understood by the reader with reference to the explanation of the above-described scheme.
Referring to fig. 2 and 3, fig. 2 and 3 are schematic views of the whole flow, and the contents of fig. 2 and 3 cannot be drawn together in one piece of paper, so they are drawn in two pieces. The invention also provides a double protection method of the balance car battery, which is a protection method based on the double protection circuit disclosed by the embodiments, and at least comprises a first protection module IC1, a second protection module MCU2, the second protection module MCU2, a first discharging control switch 3, a second discharging control switch 4, a first charging control switch 5 and a second charging control switch 6, which are connected in a mode shown in figure 1, wherein the second protection module MCU2 controls the MOS tube according to the following steps;
s1, starting power-on;
s2, setting a flag bit for opening a charge/discharge MOS tube; the MOS tube comprises a first discharging control switch 3, a second discharging control switch 4, a first charging control switch 5 and a second charging control switch 6;
s3, whether the battery state position is in a sleep mode or not, if so, jumping to the step S6, and if not, entering the next step; this step mainly checks whether the battery is not used for a long time and is in a sleep mode;
s4, whether the battery state position is short-circuited or not, if so, jumping to the step S6, and if not, entering the next step; the method mainly comprises the steps of checking whether a battery has a short circuit phenomenon or not;
s5, if the battery state position is in the discharge overcurrent state, the step S6 is entered, and if not, the step S7 is skipped;
s6, disconnecting the charge/discharge MOS tube; the MOS tube comprises a first discharging control switch 3, a second discharging control switch 4, a first charging control switch 5 and a second charging control switch 6;
s7, whether the battery state position is over-charged or not, if so, jumping to the step S10, and if not, entering the next step;
s8, if the battery state position is high in charging temperature, jumping to the step S10, and if not, entering the next step;
s9, if the battery state position is low in charging temperature, entering a step S10, and if not, jumping to a step 11;
s10, if the battery state position is set to be charged, entering a step S12, and if not, entering a step S14;
s11, if the battery state position is in the charging overcurrent state, jumping to the step S14, and if not, entering the next step;
s12, closing a charge/discharge MOS tube; the MOS tube comprises a first discharging control switch 3, a second discharging control switch 4, a first charging control switch 5 and a second charging control switch 6;
s13, if the battery state position is set to be over-placed, jumping to the step S16, and if not, entering the step 15;
s14, the charging MOS tube is opened, and the discharging MOS tube is closed; the charging MOS tube in the step is a first discharging control switch 3 and a first charging control switch 5, and the discharging MOS tube is a second discharging control switch 4 and a second charging control switch 6;
s15, whether a key request exists or not;
s16, if the battery state position is in charge, jumping to the step S18, and if not, jumping to the step 19;
s17, if the battery state position is low in discharge temperature, jumping to the step S21, and if not, jumping to the step 20;
s18, closing a charge/discharge MOS tube; the MOS tube comprises a first discharging control switch 3, a second discharging control switch 4, a first charging control switch 5 and a second charging control switch 6;
s19, closing a charging MOS tube and opening a discharging MOS tube; the charging MOS tube in the step is a first discharging control switch 3 and a first charging control switch 5, and the discharging MOS tube is a second discharging control switch 4 and a second charging control switch 6;
s20, if the battery state position is high in discharge temperature, entering a step S21, and if not, jumping to a step 22;
s21, disconnecting the charge/discharge MOS tube;
s22, ending.
In each of the above embodiments, during normal operation, the first discharging control switch 3, the second discharging control switch 4, the first charging control switch 5 and the second charging control switch 6 are all in a closed state.
It should be noted that, for the detailed explanation of the above embodiments, the purpose of explaining the present invention is to be interpreted as a better explanation of the present invention, but these descriptions should not be construed as limiting the present invention for any reason, in particular, the respective features described in the different embodiments may also be arbitrarily combined with each other to constitute other embodiments, and these features should be understood as being applicable to any one embodiment, except for the explicitly contrary descriptions.
Claims (9)
1. The double protection method of the balance car battery double protection circuit is characterized in that the double protection circuit comprises a first protection module IC (1) and a second protection module MCU (2), a first discharge control switch (3) and a second discharge control switch (4), and the double protection method is characterized in that the first discharge control switch (3) and the second discharge control switch (4) are connected in series in a battery main loop, the first protection module IC (1) acquires real-time discharge working parameters of a battery (7), and when the real-time discharge working parameters are abnormal, the first protection module IC (1) controls the first discharge control switch (3) to be disconnected; the second protection module MCU (2) acquires the real-time discharge working parameters of the first protection module IC (1) in real time, compares the real-time discharge working parameters with the standard discharge working parameters preset by the second protection module MCU (2), and controls the second discharge control switch (4) to be disconnected when the discharge real-time parameters exceed the preset discharge working parameters;
wherein, the second protection module MCU (2) controls the MOS tube according to the following steps;
s1, starting power-on;
s2, setting a flag bit for opening a charge/discharge MOS tube;
s3, whether the battery state position is in a sleep mode or not, if so, jumping to the step S6, and if not, entering the next step;
s4, whether the battery state position is short-circuited or not, if so, jumping to the step S6, and if not, entering the next step;
s5, if the battery state position is in the discharge overcurrent state, the step S6 is entered, and if not, the step S7 is skipped;
s6, disconnecting the charge/discharge MOS tube;
s7, whether the battery state position is over-charged or not, if so, jumping to the step S10, and if not, entering the next step;
s8, if the battery state position is high in charging temperature, jumping to the step S10, and if not, entering the next step;
s9, if the battery state position is low in charging temperature, entering a step S10, and if not, jumping to a step 11;
s10, if the battery state position is set to be charged, entering a step S12, and if not, entering a step S14;
s11, if the battery state position is in the charging overcurrent state, jumping to the step S14, and if not, entering the next step;
s12, closing a charge/discharge MOS tube;
s13, if the battery state position is set to be over-placed, jumping to the step S16, and if not, entering the step 15;
s14, opening charging and closing discharging;
s15, whether a key request exists or not,
s16, if the battery state position is in charge, jumping to the step S18, and if not, jumping to the step 19;
s17, if the battery state position is low in discharge temperature, jumping to the step S21, and if not, jumping to the step 20;
s18, closing a charge/discharge MOS tube;
s19, closing a charging MOS tube and opening a discharging MOS tube;
s20, if the battery state position is high in discharge temperature, entering a step S21, and if not, jumping to a step 22;
s21, disconnecting the charge/discharge MOS tube;
s22, ending.
2. The double protection method of the balance car battery double protection circuit according to claim 1, wherein the second protection module MCU (2) acquires real-time working parameters of the first protection module IC (1) in real time, compares the real-time working parameters with standard discharge working parameters preset by the second protection module MCU (2), and when the discharge real-time parameters exceed the preset discharge working parameters, and the first discharge control switch (3) is closed, the second protection module MCU (2) controls the second discharge control switch (4) to be opened.
3. The double protection method of the balance car battery double protection circuit according to claim 1 or 2, further comprising a first charging control switch (5) and a second charging control switch (6), wherein the first charging control switch (5) and the second charging control switch (6) are connected in series in a battery main loop, the first protection module IC (1) acquires a real-time charging working parameter of the battery (7), and when the real-time charging working parameter is abnormal, the first protection module IC (1) controls the first charging control switch (5) to be disconnected; the second protection module MCU (2) acquires real-time charging working parameters of the first protection module IC (1) in real time, compares the real-time charging working parameters with standard charging working parameters preset by the second protection module MCU (2), and controls the second charging control switch (6) to be disconnected when the charging real-time parameters exceed the preset charging working parameters.
4. The dual protection method of the balance car battery dual protection circuit according to claim 3, wherein the second protection module MCU (2) acquires the real-time charging operation parameter of the first protection module IC (1) in real time, compares the real-time charging operation parameter with the standard charging operation parameter preset by the second protection module MCU (2), and when the charging real-time parameter exceeds the preset charging operation parameter, and the first charging control switch (5) is closed, the second protection module MCU (2) controls the second charging control switch (6) to be opened.
5. The double protection method of the balance car battery double protection circuit according to claim 1 or 2, wherein the first discharge control switch (3) and the second discharge control switch (4) are MOS transistors.
6. The dual protection method of the balance car battery dual protection circuit according to claim 5, wherein the MOS transistor is an N-type MOS transistor or a P-type MOS transistor.
7. The double protection method of the balance car battery double protection circuit according to claim 3, wherein the first charging control switch (5) and the second charging control switch (6) are MOS transistors.
8. The dual protection method of the balance car battery dual protection circuit according to claim 7, wherein the MOS transistor is an N-type MOS transistor or a P-type MOS transistor.
9. The dual protection method of a balance car battery dual protection circuit according to claim 1 or 2, wherein the real-time discharge operation parameters include one or more of voltage, current and temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112294.7A CN107650686B (en) | 2017-11-13 | 2017-11-13 | Dual protection circuit of balance car battery and protection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112294.7A CN107650686B (en) | 2017-11-13 | 2017-11-13 | Dual protection circuit of balance car battery and protection method thereof |
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| CN107650686A CN107650686A (en) | 2018-02-02 |
| CN107650686B true CN107650686B (en) | 2023-10-27 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US8749193B1 (en) * | 2013-05-10 | 2014-06-10 | Inpower Llc | Battery protection circuit for multiple battery power supply and charging system |
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| CN107650686A (en) | 2018-02-02 |
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