CN214380066U - A protection shield that is used for four strings of lithium cell packages of 16.8V - Google Patents
A protection shield that is used for four strings of lithium cell packages of 16.8V Download PDFInfo
- Publication number
- CN214380066U CN214380066U CN202120651158.0U CN202120651158U CN214380066U CN 214380066 U CN214380066 U CN 214380066U CN 202120651158 U CN202120651158 U CN 202120651158U CN 214380066 U CN214380066 U CN 214380066U
- Authority
- CN
- China
- Prior art keywords
- pin
- control chip
- voltage
- electrically connected
- protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 139
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 139
- 239000003990 capacitor Substances 0.000 claims abstract description 84
- 238000001514 detection method Methods 0.000 claims description 27
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 238000013021 overheating Methods 0.000 claims description 6
- 101100435119 Arabidopsis thaliana APRR1 gene Proteins 0.000 claims description 3
- 101100435120 Arabidopsis thaliana APRR2 gene Proteins 0.000 claims description 3
- 101100481792 Schizosaccharomyces pombe (strain 972 / ATCC 24843) toc1 gene Proteins 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 4
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a protection shield that is used for four cluster lithium cell packages of 16.8V, include: the control chip, control chip's anodal input pin VCC pin loops through consumption resistance R5, the positive terminal that goes up the anti-reverse connection diode D1 electric connection fourth lithium cell of electricity, control chip's anodal input pin VCC pin passes through the negative pole end of voltage-stabilizing capacitor C5 electric connection first lithium cell, control chip's power negative pole input pin GND pin electric connection first lithium cell's negative pole end. In this way, the utility model discloses a protection shield for four cluster lithium cell packages of 16.8V can realize multiple protect function such as multistage current protection, temperature protection, reverse protection, steady voltage protection through adopting the protection that novel protection shield is used for four cluster lithium cell packages, has extensive market prospect in the popularization of the protection shield that is used for four cluster lithium cell packages of 16.8V.
Description
Technical Field
The utility model relates to a lithium cell protection field especially relates to a protection shield that is used for four strings of lithium cell packages of 16.8V.
Background
In the present lithium electricity trade, lithium electricity protection shield is the important guarantee of guaranteeing a lithium cell life, and basic protect function is three major protect function of high-pressure protection, low pressure protection, overcurrent protection, and most products have the fault rate height in the current world product, the circuit is complicated, lack some shortcomings such as protect function that can influence battery life and safe in utilization, like high temperature protection, low temperature protection, functions such as reverse protection are unfavorable for effectively protecting the lithium cell.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a protection shield that is used for four cluster lithium cell packages of 16.8V, is used for the protection of four cluster lithium cell packages through adopting novel protection shield, can realize multiple protect function such as multistage current protection, temperature protection, reverse protection, steady voltage protection, has extensive market prospect in the popularization of the protection shield that is used for four cluster lithium cell packages of 16.8V.
In order to solve the technical problem, the utility model provides a protection shield for four cluster lithium cell packages of 16.8V, four cluster lithium cell packages of 16.8V include first lithium cell, second lithium cell, third lithium cell and fourth lithium cell, first lithium cell, second lithium cell, third lithium cell and fourth lithium cell establish ties in proper order, the protection shield includes: a control chip for controlling the operation of the electronic device,
the power supply positive electrode input pin VCC pin of the control chip is electrically connected with the positive electrode end of the fourth lithium battery through a power consumption resistor R5 and a power-on reverse-connection-prevention diode D1 in sequence, the power consumption resistor R5 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the power supply positive electrode input pin VCC pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a voltage-stabilizing capacitor C5, the voltage-stabilizing capacitor C5 is used for stabilizing output voltage and preventing error protection when discharging, the power supply negative electrode input pin GND pin of the control chip is electrically connected with the negative electrode end of the first lithium battery, the power supply positive electrode input pin VCC pin is matched with the power supply negative electrode input GND pin for use to provide power for the control chip,
the battery voltage input pin VC4 pin of the control chip is electrically connected with the positive terminal of the fourth lithium battery through a power consumption resistor R4, the power consumption resistor R4 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC4 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C4, and the filter capacitor C4 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC3 pin of the control chip is electrically connected with the positive terminal of the third lithium battery through a power consumption resistor R3, the power consumption resistor R3 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC3 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C3, and the filter capacitor C3 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC2 pin of the control chip is electrically connected with the positive terminal of the second lithium battery through a power consumption resistor R2, the power consumption resistor R2 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC2 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C2, and the filter capacitor C2 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC1 pin of the control chip is electrically connected with the positive terminal of the first lithium battery through a power consumption resistor R1, the power consumption resistor R1 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC1 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C1, and the filter capacitor C1 enables a voltage signal entering the control chip to be smoother,
the DO pin of the control chip is electrically connected with the G pole of a discharge MOS tube Q2 through a pull-up resistor R9, the voltage of the DO pin is pulled up to the G pole of a discharge MOS tube Q2, the S pole of the discharge MOS tube Q2 is electrically connected with the output end of a power consumption resistor R10, the D pole of the discharge MOS tube Q2 is electrically connected with the D pole of a charge MOS tube Q1, the CO pin is electrically connected with the G pole of a charge MOS tube Q1, the CO pin is electrically connected with the S pole of a charge MOS tube Q1 through a pull-down resistor R8, the pull-down resistor R8 pulls the voltage of the CO pin down to the negative pole when protection or contact protection occurs, the D pole of the discharge MOS tube Q2 is electrically connected with the S pole of a discharge MOS tube Q2 through a pull-down resistor R11, and the pull-down resistor R11 pulls the voltage down to the negative pole when protection or contact protection occurs,
the current detection pin VIN pin of the control chip is electrically connected with the negative end of the first lithium battery through a filter capacitor C12, the filter capacitor C12 enables a voltage signal entering an IC to be smoother, the current detection pin VIN pin of the control chip is electrically connected with the negative end of the first lithium battery through a power consumption resistor R10 and a Ren alloy resistor Rsn in sequence, the power consumption resistor R10 is used for preventing a large current from entering the control chip to damage an internal integrated circuit, when the current passes through the Ren alloy resistor Rsn, a voltage drop is generated, the VIN pin of the current detection pin is used for collecting voltage drop parameters and comparing a set value Z and a set value P, when the voltage drop reaches the set value Z and lasts for a period of time, the overcurrent phenomenon is considered to occur, when the voltage drop reaches the set value P, the short circuit phenomenon is considered to occur, and the DO pin is switched from a high level to a high resistance state to turn off the discharge MOS tube Q2,
the battery voltage input pin VC4 pin, the battery voltage input pin VC3 pin, the battery voltage input pin VC2 pin, the battery voltage input pin VC1 pin are respectively to the fourth lithium cell, the third lithium cell, the second lithium cell, the first lithium cell sample, and the sampling voltage signal carries out voltage comparison via the logic circuit in the control chip:
when the voltage is in the interval from the set value X to the set value Y, the DO pin and the CO pin of the control chip output high level, the DO pin controls the discharge MOS tube Q2 to be opened, the CO pin controls the charge MOS tube Q1 to be opened,
when the voltage is lower than the set value X for a certain time, the low-voltage protection is regarded as the low-voltage protection, when the voltage is higher than the set value Y for a certain time, the high-voltage protection is regarded as the high-voltage protection, the DO pin is switched from the high level to the high-resistance state, the discharging MOS tube Q2 is switched off, the CO pin is switched from the high level to the high-resistance state, the charging MOS tube Q1 is switched off,
the high-voltage delay pin TOV pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a delay capacitor C6 and used for controlling the delay time of high-voltage protection, the delay capacitor C6 changes the delay time by adjusting the capacitance value,
the low-voltage time-delay pin TOVD pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a time-delay capacitor C7 and is used for controlling the time delay of low-voltage protection, the time-delay capacitor C7 changes the time delay by adjusting the capacitance value,
the overcurrent delay pin TOC1 of the control chip is electrically connected with the negative terminal of the first lithium battery through a delay capacitor C8 and is used for controlling the delay time of an overcurrent phenomenon, the delay capacitor C8 changes the delay time by adjusting the capacitance value,
the circuit protection delay pin TOC2 pin of the control chip is electrically connected with the negative end of the first lithium battery through a delay capacitor C9 and is used for controlling the delay time of the short circuit phenomenon, the delay capacitor C9 changes the delay time by adjusting the capacitance value,
when the voltage drop of the current detection pin VIN after the detection of the current detection pin VIN passes through the Ren alloy resistor Rsn reaches a set value Z2 and is regarded as short-circuit after a period of time, the DO pin is switched from high level to high resistance state to turn off the discharge MOS tube Q2,
the NTC pin of the temperature detection pin of the control chip is electrically connected with the negative end of the first lithium battery in parallel through a thermistor NTC and a filter capacitor C10, when the temperature rises and the resistance value of the thermistor NTC is equal to or lower than a set value Q, the overheating phenomenon is considered to occur, the CO pin is switched from a high level to a high resistance state to turn off a charging MOS tube Q1, the DO pin is switched from the high level to the high resistance state to turn off a discharging MOS tube Q2, and when the temperature falls and the resistance value of the thermistor NTC rises back to the set value Q, the overheating protection is removed,
the TRH pin of the temperature adjusting pin of the control chip is electrically connected with the cathode end of the first lithium battery of the furnace through a temperature adjusting resistor R6 and a filter capacitor C11 in parallel for adjusting a set value Q of overheat protection,
the VM pin of the charger detection pin of the control chip is electrically connected with the S pole of the charging MOS tube Q1 through a pull-down resistor R7, the pull-down resistor R7 pulls the voltage of the pin to the negative pole when protection or contact protection occurs, the VM pin of the charger detection pin collects voltage drop data and compares the voltage drop data with a preset value W, when the charger or a load is connected, the current generates voltage drop after passing through the charging MOS tube Q1, when the voltage drop is detected, the load is connected, when the voltage drop reaches the preset value W, the charger is connected,
the anode of the protection plate is electrically connected with the anode end of the fourth lithium battery, the cathode of the protection plate is electrically connected with the D pole of the discharge MOS tube, the cathode of the protection plate is electrically connected with the anode of the protection plate through a voltage fast recovery diode D2,
the charging and discharging device of the lithium battery is electrically connected with the S pole of the charging MOS tube Q1 through a charging anti-reverse connection diode D3.
In a preferred embodiment of the present invention, the delay time of the delay capacitor C6 is 107X capacitance value.
In a preferred embodiment of the present invention, the delay time of the delay capacitor C7 is 107X capacitance value.
In a preferred embodiment of the present invention, the delay time of the delay capacitor C8 is 106X capacitance x 2.
In a preferred embodiment of the present invention, the delay time of the delay capacitor C9 is 105X capacitance x 2.
In a preferred embodiment of the present invention, the formula of the temperature adjustment resistor R6 is the resistance x 2 of the thermistor NTC.
The utility model has the advantages that: the utility model discloses a protection shield that is used for four cluster lithium cell packages of 16.8V is through adopting the protection that novel protection shield is used for four cluster lithium cell packages, can realize multiple protect function such as multistage current protection, temperature protection, reverse protection, steady voltage protection, has extensive market prospect in the popularization of the protection shield that is used for four cluster lithium cell packages of 16.8V.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic structural diagram of a preferred embodiment of the protection plate for a 16.8V four-string lithium battery pack of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention includes:
the utility model provides a protection shield for four cluster lithium cell packages of 16.8V, four cluster lithium cell packages of 16.8V include first lithium cell, second lithium cell, third lithium cell and fourth lithium cell, first lithium cell, second lithium cell, third lithium cell and fourth lithium cell establish ties in proper order, the protection shield includes: and a control chip.
The power supply positive electrode input pin VCC pin of the control chip is electrically connected with the positive electrode end of the fourth lithium battery through a power consumption resistor R5 and a power-on reverse-connection-prevention diode D1 in sequence, the power consumption resistor R5 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the power supply positive electrode input pin VCC pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a voltage-stabilizing capacitor C5, the voltage-stabilizing capacitor C5 is used for stabilizing output voltage and preventing error protection when discharging, the power supply negative electrode input pin GND pin of the control chip is electrically connected with the negative electrode end of the first lithium battery, the power supply positive electrode input pin VCC pin is matched with the power supply negative electrode input GND pin for use to provide power for the control chip,
the battery voltage input pin VC4 pin of the control chip is electrically connected with the positive terminal of the fourth lithium battery through a power consumption resistor R4, the power consumption resistor R4 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC4 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C4, and the filter capacitor C4 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC3 pin of the control chip is electrically connected with the positive terminal of the third lithium battery through a power consumption resistor R3, the power consumption resistor R3 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC3 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C3, and the filter capacitor C3 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC2 pin of the control chip is electrically connected with the positive terminal of the second lithium battery through a power consumption resistor R2, the power consumption resistor R2 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC2 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C2, and the filter capacitor C2 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC1 pin of the control chip is electrically connected with the positive terminal of the first lithium battery through a power consumption resistor R1, the power consumption resistor R1 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC1 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C1, and the filter capacitor C1 enables a voltage signal entering the control chip to be smoother,
the DO pin of the control chip is electrically connected with the G pole of a discharge MOS tube Q2 through a pull-up resistor R9, the voltage of the DO pin is pulled up to the G pole of a discharge MOS tube Q2, the S pole of the discharge MOS tube Q2 is electrically connected with the output end of a power consumption resistor R10, the D pole of the discharge MOS tube Q2 is electrically connected with the D pole of a charge MOS tube Q1, the CO pin is electrically connected with the G pole of a charge MOS tube Q1, the CO pin is electrically connected with the S pole of a charge MOS tube Q1 through a pull-down resistor R8, the pull-down resistor R8 pulls the voltage of the CO pin down to the negative pole when protection or contact protection occurs, the D pole of the discharge MOS tube Q2 is electrically connected with the S pole of a discharge MOS tube Q2 through a pull-down resistor R11, and the pull-down resistor R11 pulls the voltage down to the negative pole when protection or contact protection occurs,
the current detection pin VIN pin of the control chip is electrically connected with the negative end of the first lithium battery through a filter capacitor C12, the filter capacitor C12 enables a voltage signal entering an IC to be smoother, the current detection pin VIN pin of the control chip is electrically connected with the negative end of the first lithium battery through a power consumption resistor R10 and a Ren alloy resistor Rsn in sequence, the power consumption resistor R10 is used for preventing a large current from entering the control chip to damage an internal integrated circuit, when the current passes through the Ren alloy resistor Rsn, a voltage drop is generated, the VIN pin of the current detection pin is used for collecting voltage drop parameters and comparing a set value Z and a set value P, when the voltage drop reaches the set value Z and lasts for a period of time, the overcurrent phenomenon is considered to occur, when the voltage drop reaches the set value P, the short circuit phenomenon is considered to occur, and the DO pin is switched from a high level to a high resistance state to turn off the discharge MOS tube Q2,
the battery voltage input pin VC4 pin, the battery voltage input pin VC3 pin, the battery voltage input pin VC2 pin, the battery voltage input pin VC1 pin are respectively to the fourth lithium cell, the third lithium cell, the second lithium cell, the first lithium cell sample, and the sampling voltage signal carries out voltage comparison via the logic circuit in the control chip:
when the voltage is in the interval from the set value X to the set value Y, the DO pin and the CO pin of the control chip output high level, the DO pin controls the discharge MOS tube Q2 to be opened, the CO pin controls the charge MOS tube Q1 to be opened,
when the voltage is lower than the set value X for a certain time, the low-voltage protection is regarded as the low-voltage protection, when the voltage is higher than the set value Y for a certain time, the high-voltage protection is regarded as the high-voltage protection, the DO pin is switched from the high level to the high-resistance state, the discharging MOS tube Q2 is switched off, the CO pin is switched from the high level to the high-resistance state, the charging MOS tube Q1 is switched off,
the high-voltage delay pin TOV pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a delay capacitor C6 and used for controlling the delay time of high-voltage protection, the delay capacitor C6 changes the delay time by adjusting the capacitance value,
the low-voltage time-delay pin TOVD pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a time-delay capacitor C7 and is used for controlling the time delay of low-voltage protection, the time-delay capacitor C7 changes the time delay by adjusting the capacitance value,
the overcurrent delay pin TOC1 of the control chip is electrically connected with the negative terminal of the first lithium battery through a delay capacitor C8 and is used for controlling the delay time of an overcurrent phenomenon, the delay capacitor C8 changes the delay time by adjusting the capacitance value,
the circuit protection delay pin TOC2 pin of the control chip is electrically connected with the negative end of the first lithium battery through a delay capacitor C9 and is used for controlling the delay time of the short circuit phenomenon, the delay capacitor C9 changes the delay time by adjusting the capacitance value,
when the voltage drop of the current detection pin VIN after the detection of the current detection pin VIN passes through the Ren alloy resistor Rsn reaches a set value Z2 and is regarded as short-circuit after a period of time, the DO pin is switched from high level to high resistance state to turn off the discharge MOS tube Q2,
the NTC pin of the temperature detection pin of the control chip is electrically connected with the negative end of the first lithium battery in parallel through a thermistor NTC and a filter capacitor C10, when the temperature rises and the resistance value of the thermistor NTC is equal to or lower than a set value Q, the overheating phenomenon is considered to occur, the CO pin is switched from a high level to a high resistance state to turn off a charging MOS tube Q1, the DO pin is switched from the high level to the high resistance state to turn off a discharging MOS tube Q2, and when the temperature falls and the resistance value of the thermistor NTC rises back to the set value Q, the overheating protection is removed,
the TRH pin of the temperature adjusting pin of the control chip is electrically connected with the cathode end of the first lithium battery of the furnace through a temperature adjusting resistor R6 and a filter capacitor C11 in parallel for adjusting a set value Q of overheat protection,
the VM pin of the charger detection pin of the control chip is electrically connected with the S pole of the charging MOS tube Q1 through a pull-down resistor R7, the pull-down resistor R7 pulls the voltage of the pin to the negative pole when protection or contact protection occurs, the VM pin of the charger detection pin collects voltage drop data and compares the voltage drop data with a preset value W, when the charger or a load is connected, the current generates voltage drop after passing through the charging MOS tube Q1, when the voltage drop is detected, the load is connected, when the voltage drop reaches the preset value W, the charger is connected,
the anode of the protection plate is electrically connected with the anode end of the fourth lithium battery, the cathode of the protection plate is electrically connected with the D pole of the discharge MOS tube, the cathode of the protection plate is electrically connected with the anode of the protection plate through a voltage fast recovery diode D2,
the charging and discharging device of the lithium battery is electrically connected with the S pole of the charging MOS tube Q1 through a charging anti-reverse connection diode D3.
Preferably, the delay time of the delay capacitor C6 is 107X capacitance value.
Preferably, the delay time of the delay capacitor C7 is 107X capacitance value.
Preferably, the delay time of the delay capacitor C8 is 106X capacitance x 2.
Preferably, the delay time of the delay capacitor C9 is 105 X capacitance x 2.
Preferably, the formula of the temperature adjustment resistor R6 is the resistance value x 2 of the thermistor NTC.
Multi-stage current protection function: because the motor starts the moment of torsion big, the electric current is big, the big electric current that produces in the twinkling of an eye very easily makes ordinary product on the market get into the overcurrent protection state, and this technical scheme adopts one-level current time delay design, and the big electric current when can avoiding the motor to start makes the product get into the mistake protection state, carries out faster protection response again to the short circuit phenomenon to the motor when second grade current threshold value simultaneously.
Temperature protection function: the characteristic that the resistance value of the temperature control resistor changes along with the temperature is utilized to acquire the environmental temperature in real time, and when an over-temperature phenomenon occurs, a discharge loop is turned off so as to protect the battery and prolong the service life of the battery.
The reverse protection function is that by utilizing the one-way conduction characteristic of the diode, when the positive electrode and the negative electrode of the input end are reversely connected by a user, the power-on reverse-connection-prevention diode D1 is in a non-conduction state, and the control chip cannot work at the moment, so that the current cannot enter the circuit board, and the safety of the product is ensured.
Voltage stabilization protection function: the two ends of the lithium battery pack are connected with a capacitor with a large capacitance value in parallel, the lithium battery pack charges the capacitor when the capacitor is not discharged, charges stored in the capacitor are discharged when the capacitor is discharged, the output voltage of the lithium battery pack is stabilized, and the lithium battery pack is prevented from entering a low-voltage error protection state due to the fact that the voltage of the lithium battery pack is pulled down by large current in the moment of starting.
The utility model discloses a beneficial effect that is used for four protection shields of cluster lithium cell package of 16.8V is:
through adopting the protection that novel protection shield is used for four cluster lithium cell packages, can realize multiple protect function such as multistage current protection, temperature protection, reverse protection, steady voltage protection.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (6)
1. The utility model provides a protection shield for four cluster lithium cell packages of 16.8V, four cluster lithium cell packages of 16.8V include first lithium cell, second lithium cell, third lithium cell and fourth lithium cell, first lithium cell, second lithium cell, third lithium cell and fourth lithium cell establish ties in proper order, its characterized in that, the protection shield includes: a control chip for controlling the operation of the electronic device,
the power supply positive electrode input pin VCC pin of the control chip is electrically connected with the positive electrode end of the fourth lithium battery through a power consumption resistor R5 and a power-on reverse-connection-prevention diode D1 in sequence, the power consumption resistor R5 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the power supply positive electrode input pin VCC pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a voltage-stabilizing capacitor C5, the voltage-stabilizing capacitor C5 is used for stabilizing output voltage and preventing error protection when discharging, the power supply negative electrode input pin GND pin of the control chip is electrically connected with the negative electrode end of the first lithium battery, the power supply positive electrode input pin VCC pin is matched with the power supply negative electrode input GND pin for use to provide power for the control chip,
the battery voltage input pin VC4 pin of the control chip is electrically connected with the positive terminal of the fourth lithium battery through a power consumption resistor R4, the power consumption resistor R4 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC4 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C4, and the filter capacitor C4 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC3 pin of the control chip is electrically connected with the positive terminal of the third lithium battery through a power consumption resistor R3, the power consumption resistor R3 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC3 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C3, and the filter capacitor C3 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC2 pin of the control chip is electrically connected with the positive terminal of the second lithium battery through a power consumption resistor R2, the power consumption resistor R2 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC2 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C2, and the filter capacitor C2 enables a voltage signal entering the control chip to be smoother,
the battery voltage input pin VC1 pin of the control chip is electrically connected with the positive terminal of the first lithium battery through a power consumption resistor R1, the power consumption resistor R1 is used for preventing large current from entering the control chip to damage an internal integrated circuit, the battery voltage input pin VC1 pin of the control chip is electrically connected with the negative terminal of the first lithium battery through a filter capacitor C1, and the filter capacitor C1 enables a voltage signal entering the control chip to be smoother,
the DO pin of the control chip is electrically connected with the G pole of a discharge MOS tube Q2 through a pull-up resistor R9, the voltage of the DO pin is pulled up to the G pole of a discharge MOS tube Q2, the S pole of the discharge MOS tube Q2 is electrically connected with the output end of a power consumption resistor R10, the D pole of the discharge MOS tube Q2 is electrically connected with the D pole of a charge MOS tube Q1, the CO pin is electrically connected with the G pole of a charge MOS tube Q1, the CO pin is electrically connected with the S pole of a charge MOS tube Q1 through a pull-down resistor R8, the pull-down resistor R8 pulls the voltage of the CO pin down to the negative pole when protection or contact protection occurs, the D pole of the discharge MOS tube Q2 is electrically connected with the S pole of a discharge MOS tube Q2 through a pull-down resistor R11, and the pull-down resistor R11 pulls the voltage down to the negative pole when protection or contact protection occurs,
the current detection pin VIN pin of the control chip is electrically connected with the negative end of the first lithium battery through a filter capacitor C12, the filter capacitor C12 enables a voltage signal entering an IC to be smoother, the current detection pin VIN pin of the control chip is electrically connected with the negative end of the first lithium battery through a power consumption resistor R10 and a Ren alloy resistor Rsn in sequence, the power consumption resistor R10 is used for preventing a large current from entering the control chip to damage an internal integrated circuit, when the current passes through the Ren alloy resistor Rsn, a voltage drop is generated, the VIN pin of the current detection pin is used for collecting voltage drop parameters and comparing a set value Z and a set value P, when the voltage drop reaches the set value Z and lasts for a period of time, the overcurrent phenomenon is considered to occur, when the voltage drop reaches the set value P, the short circuit phenomenon is considered to occur, and the DO pin is switched from a high level to a high resistance state to turn off the discharge MOS tube Q2,
the battery voltage input pin VC4 pin, the battery voltage input pin VC3 pin, the battery voltage input pin VC2 pin, the battery voltage input pin VC1 pin are respectively to the fourth lithium cell, the third lithium cell, the second lithium cell, the first lithium cell sample, and the sampling voltage signal carries out voltage comparison via the logic circuit in the control chip:
when the voltage is in the interval from the set value X to the set value Y, the DO pin and the CO pin of the control chip output high level, the DO pin controls the discharge MOS tube Q2 to be opened, the CO pin controls the charge MOS tube Q1 to be opened,
when the voltage is lower than the set value X for a certain time, the low-voltage protection is regarded as the low-voltage protection, when the voltage is higher than the set value Y for a certain time, the high-voltage protection is regarded as the high-voltage protection, the DO pin is switched from the high level to the high-resistance state, the discharging MOS tube Q2 is switched off, the CO pin is switched from the high level to the high-resistance state, the charging MOS tube Q1 is switched off,
the high-voltage delay pin TOV pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a delay capacitor C6 and used for controlling the delay time of high-voltage protection, the delay capacitor C6 changes the delay time by adjusting the capacitance value,
the low-voltage time-delay pin TOVD pin of the control chip is electrically connected with the negative electrode end of the first lithium battery through a time-delay capacitor C7 and is used for controlling the time delay of low-voltage protection, the time-delay capacitor C7 changes the time delay by adjusting the capacitance value,
the overcurrent delay pin TOC1 of the control chip is electrically connected with the negative terminal of the first lithium battery through a delay capacitor C8 and is used for controlling the delay time of an overcurrent phenomenon, the delay capacitor C8 changes the delay time by adjusting the capacitance value,
the circuit protection delay pin TOC2 pin of the control chip is electrically connected with the negative end of the first lithium battery through a delay capacitor C9 and is used for controlling the delay time of the short circuit phenomenon, the delay capacitor C9 changes the delay time by adjusting the capacitance value,
when the voltage drop of the current detection pin VIN after the detection of the current detection pin VIN passes through the Ren alloy resistor Rsn reaches a set value Z2 and is regarded as short-circuit after a period of time, the DO pin is switched from high level to high resistance state to turn off the discharge MOS tube Q2,
the NTC pin of the temperature detection pin of the control chip is electrically connected with the negative end of the first lithium battery in parallel through a thermistor NTC and a filter capacitor C10, when the temperature rises and the resistance value of the thermistor NTC is equal to or lower than a set value Q, the overheating phenomenon is considered to occur, the CO pin is switched from a high level to a high resistance state to turn off a charging MOS tube Q1, the DO pin is switched from the high level to the high resistance state to turn off a discharging MOS tube Q2, and when the temperature falls and the resistance value of the thermistor NTC rises back to the set value Q, the overheating protection is removed,
the TRH pin of the temperature adjusting pin of the control chip is electrically connected with the cathode end of the first lithium battery of the furnace through a temperature adjusting resistor R6 and a filter capacitor C11 in parallel for adjusting a set value Q of overheat protection,
the VM pin of the charger detection pin of the control chip is electrically connected with the S pole of the charging MOS tube Q1 through a pull-down resistor R7, the pull-down resistor R7 pulls the voltage of the pin to the negative pole when protection or contact protection occurs, the VM pin of the charger detection pin collects voltage drop data and compares the voltage drop data with a preset value W, when the charger or a load is connected, the current generates voltage drop after passing through the charging MOS tube Q1, when the voltage drop is detected, the load is connected, when the voltage drop reaches the preset value W, the charger is connected,
the anode of the protection plate is electrically connected with the anode end of the fourth lithium battery, the cathode of the protection plate is electrically connected with the D pole of the discharge MOS tube, the cathode of the protection plate is electrically connected with the anode of the protection plate through a voltage fast recovery diode D2,
the charging and discharging device of the lithium battery is electrically connected with the S pole of the charging MOS tube Q1 through a charging anti-reverse connection diode D3.
2. The protective plate for a 16.8V four-string lithium battery pack as claimed in claim 1, wherein the delay time of the delay capacitor C6 is 107X capacitance value.
3. The protective plate for a 16.8V four-string lithium battery pack as claimed in claim 1, wherein the delay time of the delay capacitor C7 is 107X capacitance value.
4. The protective plate for a 16.8V four-string lithium battery pack as claimed in claim 1, wherein the delay time of the delay capacitor C8 is 106X capacitance x 2.
5. The protective plate for a 16.8V four-string lithium battery pack as claimed in claim 1, wherein the delay time of the delay capacitor C9 is 105X capacitance x 2.
6. The protection panel for a 16.8V four-string lithium battery pack as claimed in claim 1, wherein the formula of the temperature adjustment resistor R6 is a resistance value x 2 of the thermistor NTC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120651158.0U CN214380066U (en) | 2021-03-31 | 2021-03-31 | A protection shield that is used for four strings of lithium cell packages of 16.8V |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120651158.0U CN214380066U (en) | 2021-03-31 | 2021-03-31 | A protection shield that is used for four strings of lithium cell packages of 16.8V |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214380066U true CN214380066U (en) | 2021-10-08 |
Family
ID=77973050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120651158.0U Active CN214380066U (en) | 2021-03-31 | 2021-03-31 | A protection shield that is used for four strings of lithium cell packages of 16.8V |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214380066U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115622193A (en) * | 2022-11-03 | 2023-01-17 | 广州云通锂电池股份有限公司 | Protection circuit of rechargeable battery |
-
2021
- 2021-03-31 CN CN202120651158.0U patent/CN214380066U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115622193A (en) * | 2022-11-03 | 2023-01-17 | 广州云通锂电池股份有限公司 | Protection circuit of rechargeable battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203339772U (en) | Electronic cigarette USB charger | |
| CN202663092U (en) | Circuit protecting battery against overcharge | |
| CN103166290A (en) | Control and protection circuit for single-lithium battery electric tool and detection and control method for control and protection circuit | |
| CN203574534U (en) | Surge current suppressing circuit | |
| CN214380066U (en) | A protection shield that is used for four strings of lithium cell packages of 16.8V | |
| CN214626348U (en) | A dual protection type protection shield that charges for five strings of lithium cell packages of 21V | |
| CN214626465U (en) | Minimum configuration type protection plate for 12.6V three-string lithium battery pack | |
| CN205484540U (en) | Area is from recovery function's current detection module | |
| CN214543725U (en) | A protection shield that is used for three strings of lithium cell packages of 12.6V | |
| CN214543727U (en) | A protection shield for six cluster lithium cell packages of 25V | |
| CN214543726U (en) | Protective plate for 21V five-battery series-structure lithium battery pack | |
| CN214626349U (en) | Temperature protection type protection plate for 21V five-string lithium battery pack | |
| CN214626464U (en) | Temperature protection type protection plate for 25V six-string lithium battery pack | |
| CN214626463U (en) | A time delay protection type protection shield for five cluster lithium cell packages of 21V | |
| CN209233749U (en) | Driver current-limited startup circuit for DC power-supply system | |
| CN103872737A (en) | Battery charge and discharge circuit with multifunctional protection plate | |
| CN214626462U (en) | Positive electrode charging type protection plate for 12.6V three-string lithium battery pack | |
| CN203826946U (en) | Cell explosionproof circuit and cell charging circuit | |
| CN212258401U (en) | Overvoltage protection circuit for storage battery | |
| CN217769546U (en) | Self-lifting type protection plate for 21V five-section lithium battery pack | |
| CN101478231A (en) | Voltage stabilizing circuit having time keeping function | |
| CN211428937U (en) | Electronic cigarette battery pack and electronic cigarette | |
| CN209419265U (en) | A kind of nickel-hydrogen battery charging circuit | |
| CN203289156U (en) | Novel mobile phone mobile power supply | |
| CN202679235U (en) | Switch power supply device achieving low loss during short circuit protecting process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 302, Unit 1, Building 8, No. 658 Dongshan Street, Tangxi Town, Wucheng District, Jinhua City, Zhejiang Province, 321000 Patentee after: Jinhua Jinghong Technology Co.,Ltd. Country or region after: China Address before: 321200 north side of Yongwu second line, Jinsi village, Tongqin Town, Wuyi County, Jinhua City, Zhejiang Province (in Wuyi Wangchun Hardware Tools Co., Ltd.) (self declaration) Patentee before: Wuyi Jinghong Electronic Technology Co.,Ltd. Country or region before: China |