CN207303271U - Battery pack monitoring device - Google Patents
Battery pack monitoring device Download PDFInfo
- Publication number
- CN207303271U CN207303271U CN201720848714.7U CN201720848714U CN207303271U CN 207303271 U CN207303271 U CN 207303271U CN 201720848714 U CN201720848714 U CN 201720848714U CN 207303271 U CN207303271 U CN 207303271U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 125
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a battery pack monitoring device, which comprises a group of main control units, a plurality of groups of monitoring units, an isolation circuit and a plurality of groups of level conversion circuits, wherein the monitoring units and the main control units monitor batteries; the master control unit and the monitoring units are connected in series through wires, and signal sending pins of communication wires of the master control unit and the monitoring units are respectively connected with signal receiving pins of the communication wires of the next group of monitoring units connected in series through level conversion circuits; and the signal sending pins of the communication lines of the last group of monitoring units connected in series are connected with the signal receiving pins of the communication lines of the main control unit through an isolation circuit. The monitoring unit of the utility model can be increased or decreased arbitrarily, and the flexibility is good; the main control unit can monitor the battery, the cost is reduced, signal isolation is carried out only through one path, and level conversion among the main control unit, the monitoring unit and the monitoring unit is carried out by adopting a switch tube, so that the voltage withstand requirement of the circuit is low, and the cost is low.
Description
Technical field
The utility model is specifically related to a kind of battery pack monitoring device.
Background technology
With the development and the improvement of people's living standards of national economy technology, battery has become the daily production of people
With essential articles for use in life, production and life to people bring endless facility.
Battery is generally divided into rechargeable battery and non-rechargeable battery, and rechargeable battery is because of its reuse that can charge
Characteristic, be widely used in all types of occasions.Rechargeable battery is when specifically used, often through the series connection and simultaneously of polylith battery
Connection, so as to achieve the purpose that the output voltage and raising battery pack load capacity for lifting battery pack.
However, in order to ensure the security of rechargeable battery pack, prevent chargeable battery (lithium battery/lead-acid accumulator etc.) into
Enter to overcharge, put excessively, the excessively high abnormality of temperature, be typically necessary battery cell monitoring function.However, due to the electricity in battery pack
Pond is generally more, and the number of battery cells that battery monitoring unit is generally possible to monitor at the same time is relatively fewer, therefore generally exists more
Battery pack monitoring unit and one group of main control unit are monitored battery pack；The control of the controller and monitoring unit of main control unit
Device is communicated using bus, and the controller of monitoring unit is by corresponding sample circuit to the state of battery (such as output electricity
Pressure, output current, operating temperature etc.) it is monitored.Just because of this, between multigroup battery monitoring unit and monitoring unit with
Just it must be connected with each other and communicate between main control unit, so as to achieve the purpose that to carry out comprehensively monitoring to battery pack.
At present, in the battery cell monitoring network of multigroup battery monitoring unit composition, there are problems that two：First, each group monitors
Control signal level mismatches between unit, it is presented as that voltage difference is higher, easily causes device failure；Second, multiple monitoring units
It is excessive to the electric wire for needing to connect between main control unit, the difficulty of increase system assembling.Such as the battery cell monitoring in ring-shaped network
Network, it is assumed that each total output voltage of battery assembly module is V, and battery pack is by N number of battery assembly module, adjacent two monitoring units
Between control signal voltage difference be 2*V, but the main control module being connected with first monitoring unit and last monitoring unit
On, voltage difference can reach N*V；Although level conversion or optocoupler can be used to solve the above problems, level conversion
The resistance to pressure request of circuit is high, and the cost of optocoupler is also very high.
Utility model content
The purpose of this utility model is to provide a kind of battery pack monitoring device of low cost, the resistance to pressure request of circuit is low.
The utility model provides this battery pack monitoring device, including one group of main control unit and some groups of monitoring units, if
Dry group monitoring unit carries out condition monitoring to battery, further includes isolation circuit all the way and some groups of level shifting circuits；Master control
The controller of unit carries out data acquisition by sample circuit to the output state parameter of battery, so that the state of complete battery pair
Monitoring；Main control unit and monitoring unit are connected by order wire, and the signal of the order wire of main control unit and monitoring unit, which is sent, to be drawn
Foot receives pin each via the signal of next group of monitoring unit order wire of level shifting circuit connection series connection；That connects is last
The signal of one group of monitoring unit order wire sends the signal reception that pin connects main control unit order wire by isolation circuit all the way
Pin.
The isolation circuit is optical coupling isolation circuit or switching tube level shifting circuit.
The circuit that the optical coupling isolation circuit is formed using the opto-coupler chip of model 6N137.
The optical coupling isolation circuit includes opto-coupler chip 6N137 and input terminal current-limiting resistance；Last group of monitoring unit
The signal of order wire send 3 feet of pin connection opto-coupler chip, the power supply signal of last group of monitoring unit passes through input terminal
Current-limiting resistance connects the power pins of 2 feet of opto-coupler chip, 7 feet of opto-coupler chip and 8 feet connection main control unit, opto-coupler chip
5 feet are grounded, and 6 feet of opto-coupler chip receive pin with the signal of main control unit order wire and are connected.
The switching tube level shifting circuit include first switch pipe, first switch pipe current-limiting resistance, second switch pipe,
Second switch pipe current-limiting resistance and second switch pipe pull-up resistor；The signal of the order wire of last group of monitoring unit sends pin
First switch pipe control terminal, one end connection left and right one of the movable end of first switch pipe are connected by first switch pipe current-limiting resistance
The positive pole of group monitoring unit, the other end of the movable end of first switch pipe connect second by second switch pipe current-limiting resistance
The control terminal of switching tube, one end ground connection of the movable end of second switch pipe, the other end of the movable end of second switch pipe pass through the
Two switching tube pull-up resistors connect the positive pole of Ei main control units, while the other end of the movable end of second switch pipe is also direct
The signal for connecting main control unit receives pin.
The switching tube is triode or metal-oxide-semiconductor.
The level shifting circuit includes sending terminal circuit and receiving terminal circuit；Transmitting terminal circuit arrangement is in main control unit
Or the signal of the order wire of monitoring unit sends pin, the signal reception that receiving terminal circuit is arranged in monitoring unit order wire is drawn
Foot；Sending terminal circuit includes transmitting terminal switching tube and transmitting terminal current-limiting resistance, and the signal of order wire sends pin and passes through transmitting terminal
The control terminal of current-limiting resistance linkup transmit end switch pipe, movable end one end ground connection of transmitting terminal switching tube, transmitting terminal switching tube
The movable end other end connects receiving terminal circuit；Receiving terminal circuit includes receiving terminal current-limiting resistance, receiving terminal pull down resistor and reception
End switch pipe；The output signal for sending terminal circuit connects the control terminal of receiving terminal switching tube by receiving terminal current-limiting resistance, receives
The power supply signal of monitoring unit, the other end of receiving terminal switching tube where movable end one end connection receiving terminal circuit of end switch pipe
It is grounded by receiving terminal pull down resistor, the signal of monitoring unit order wire receives pin where being also directly connected to receiving terminal circuit.
The signal of the order wire of last group of monitoring unit of the series connection sends pin and is connected with transmission terminal circuit, with
Toilet states the extension that battery pack monitoring device is monitored unit.
The switching tube is triode or metal-oxide-semiconductor.
The power supply signal of the monitoring unit and the signal of monitoring unit order wire send pin and are connected to terminals
Son, so that the battery pack monitoring device is monitored the reduction of unit.
This battery pack monitoring device provided by the utility model, passes through the order wire between main control unit and monitoring unit
Series connection so that monitoring unit can be increased or decreased arbitrarily so that the flexibility of monitoring device is very good；Main control unit is added
Among the monitoring of battery, so as to reduce cost, and the isolation of signal is only carried out by optocoupler all the way, and main control unit with
Level conversion between monitoring unit, monitoring unit is carried out using switching tube, therefore the resistance to pressure request of circuit is low and cost is low
It is honest and clean.
Brief description of the drawings
Fig. 1 is the functional block diagram of the utility model.
Fig. 2 is a kind of the first circuit connection diagram of embodiment of the utility model.
Fig. 3 is a kind of second circuit connection diagram of embodiment of the utility model.
Embodiment
It is the functional block diagram of the utility model as shown in Figure 1：The utility model provides this battery pack monitoring device, bag
One group of main control unit and some groups of monitoring units are included, some groups of monitoring units carry out condition monitoring to battery, further include all the way
Optical coupling isolation circuit and some groups of level shifting circuits；Output state of the controller of main control unit by sample circuit to battery
Parameter carries out data acquisition, so that the condition monitoring of complete battery pair；Main control unit and monitoring unit are connected by order wire, main
Control unit connects next group of prison of series connection with the signal transmission pin of the order wire of monitoring unit each via level shifting circuit
The signal for controlling unit communication line receives pin；The signal of last group of monitoring unit order wire of series connection sends pin and passes through all the way
The signal of optical coupling isolation circuit connection main control unit order wire receives pin.
It is illustrated in figure 2 a kind of the first circuit connection diagram of embodiment of the utility model：In this embodiment, altogether
Three Battery pack groups are monitored, therefore only one group of main control unit and two groups of monitoring units (are respectively monitoring unit 1 and monitoring
Unit 2)；The MCU of main control unit is equally used for being monitored battery pack 1；Monitoring unit 1 is used to be monitored battery pack 2,
Monitoring unit 2 is used to be monitored battery pack 3；Main control unit and monitoring unit are concatenated by order wire, main control unit communication
The signal of line sends pin (TX) by transmitting terminal circuit output signal IF1, then connects monitoring list by receiving terminal circuit again
The signal of first 1 order wire receives pin；Likewise, 1 order wire of monitoring unit signal send pin by send terminal circuit and
The signal of receiving terminal circuit connection 2 order wire of monitoring unit of monitoring unit 2 receives pin；Send terminal circuit and receiving terminal circuit
Form level shifting circuit；Transmitting terminal circuit arrangement sends pin in the signal of main control unit or the order wire of monitoring unit, connects
Receiving end circuit arrangement receives pin in the signal of monitoring unit order wire；Send terminal circuit include transmitting terminal switching tube (Q1 in figure,
Q3 and Q5) and transmitting terminal current-limiting resistance (R2, R5 and R8 in figure), the signal of order wire sends pin and passes through transmitting terminal current-limiting resistance
The control terminal of linkup transmit end switch pipe, movable end one end ground connection of transmitting terminal switching tube, the movable end of transmitting terminal switching tube are another
One end connects receiving terminal circuit；Receiving terminal circuit includes receiving terminal current-limiting resistance (R4 and R7 in figure), receiving terminal pull down resistor (figure
Middle R3 and R6) and receiving terminal switching tube (Q2 and Q4 in figure)；The output signal for sending terminal circuit is connected by receiving terminal current-limiting resistance
The control terminal of receiving terminal switching tube is connect, the electricity of monitoring unit where movable end one end connection receiving terminal circuit of receiving terminal switching tube
Source signal, the other end of receiving terminal switching tube are grounded by receiving terminal pull down resistor, are also directly connected to prison where receiving terminal circuit
The signal for controlling unit communication line receives pin；The letter of the last monitoring unit (being monitoring unit 2 in the present embodiment) all the way of series connection
Number send pin pass through optical coupling isolation circuit all the way (by resistance R1 and light-coupled isolation chip U1 in figure) connect main control unit communicate
The signal of line receives pin；Optical coupling isolation circuit includes opto-coupler chip 6N137 and input terminal current-limiting resistance；Last group monitoring is single
The signal of the order wire of member sends 3 feet of pin connection opto-coupler chip, and the power supply signal of last group of monitoring unit passes through input
Hold the power pins of 2 feet of current-limiting resistance connection opto-coupler chip, 7 feet of opto-coupler chip and 8 feet connection main control unit, opto-coupler chip
5 feet ground connection, 6 feet of opto-coupler chip are connected with the signal reception pin of main control unit order wire.
The process that main control unit sends data to monitoring unit 1 is as follows：
Coordinated by the triode Q1 of main control unit and the triode Q2 of monitoring unit 1 and realized.When the electric signal of transmission is
During high level, i.e. the TX of main control unit MCU is high level, and Q1 and Q3 are both turned at this time, so on the RX of monitoring unit 1MCU
It is high level.When the electric signal of transmission is low level, Q1 and Q3 are turned off, so being also low electricity on the RX of monitoring unit 1MCU
It is flat, it is thus achieved that the transmission of level signal.
Monitoring unit 1 sends the process of data to monitoring unit 2：Pass through the triode Q3 and monitoring unit 2 of monitoring unit 1
Triode Q4 coordinate realize.When the electric signal of transmission is high level, i.e. the TX of monitoring unit 1MCU is high level, is supervised at this time
The triode Q4 of the triode Q3 and monitoring unit 2 of controlling unit 1 are both turned on, so being also high electricity on the RX of monitoring unit 2MCU
It is flat.When the electric signal of transmission is low level, the triode Q3 of monitoring unit 1 and the triode Q4 of monitoring unit 2 are turned off, institute
To be also low level on the RX of monitoring unit 2MCU, it is thus achieved that the transmission of level signal.
Monitoring unit 2 sends the process of data to main control unit：Monitoring unit 2 and main control unit potential difference are larger, at this time
Level conversion is realized using the optocoupler U1 of main control unit.When the electric signal of transmission is high level, i.e. the TX of monitoring unit 2MCU
For high level, the light emitting diode inside optocoupler does not shine, and optocoupler output high level, i.e., be also high on the RX of main control unit MCU
Level.When the electric signal of transmission is low level, the lumination of light emitting diode inside optocoupler, optocoupler output low level, so main
It is also low level to control on the RX of unit MCU, it is thus achieved that the transmission of level signal.
Further, since there was only main control unit all the way, make so three pins (IF1, IF2 and IF3) of main control unit have
With；And all monitoring units, in addition to last group of monitoring unit of series connection, remaining monitoring unit is believed only with two-way
Number, i.e., IF6 the and IF7 pins of monitoring unit in figure.But in order to enable monitoring unit can conveniently realize increase number
Purpose cascades or deletes the cascade of number, and all monitoring units retain four road signal output interfaces, i.e. and the IF4 in figure~
IF7 interfaces, if wherein monitoring unit is last group of monitoring unit of series connection, using IF4 and IF5 interfaces and main control unit company
Connect, otherwise monitoring unit is connected using IF6 and IF7 interfaces with front and rear monitoring unit (or main control unit).
It is illustrated in figure 3 a kind of second circuit connection diagram of embodiment of the utility model：Second circuit in Fig. 3
Optical coupling isolation circuit in Fig. 2 is only replaced with switching tube level shifting circuit by connection diagram, and (switching tube can use
Triode or metal-oxide-semiconductor, using triode in Fig. 3)；Circuit in the course of work and Fig. 2 of circuit in Fig. 3 is worked
Cheng Xiangtong, simply when last group of monitoring unit (being monitoring unit 2 in figure) transmits data to main control unit, last group prison
The signal transmission pin for controlling the order wire of unit passes through first switch pipe current-limiting resistance (R1) connection first switch pipe (Q6) control
Hold (base stage), the positive pole of the one group of monitoring unit in one end (emitter) connection left and right of the movable end of first switch pipe, first
The other end (collector) of the movable end of switching tube connects second switch pipe (Q7) by second switch pipe current-limiting resistance (R9)
Control terminal (base stage), one end (emitter) ground connection of the movable end of second switch pipe, the other end of the movable end of second switch pipe
(collector) connects the positive pole of main control unit, while the work of second switch pipe by second switch pipe pull-up resistor (R10)
The signal that the other end of moved end is also directly connected to main control unit receives pin.
When battery total voltage relatively low (being less than 100V), triode level shifting circuit can be used to substitute high-speed light
Lotus root：When the TX of the MCU of monitoring unit 2 sends high level signal, Q6, Q7 cut-off, it is high electricity that the RX of main control unit MCU, which is also,
It is flat；When the TX of the MCU of monitoring unit 2 sends low level signal, Q6, Q7 conducting, it is low electricity that the RX of main control unit MCU, which is also,
It is flat；So as to complete data transfer of the monitoring unit 2 to main control unit；Height is substituted using triode level shifting circuit in low pressure
Fast optocoupler, can further reduce the cost of circuit.
If in addition, total voltage when being more than 100V after battery pack series connection, circuit great is carried for the resistance to pressure request of triode
Height, so that cause drastically to raise using the cost of triode level shifting circuit, at this time can be very using optical coupling isolation circuit
Good solution cost problem.
The utility model between main control unit and monitoring unit by will connect, so that two adjacent units
Between voltage difference it is smaller, so the conversion of level can be completed using common level shifting circuit of low cost；And going here and there
Between last group of monitoring unit and main control unit of connection, it is contemplated that higher voltage difference, so using the electricity of light-coupled isolation all the way
Road into line level transmission and conversion so that overcome in the prior art largely use optocoupler caused by it is with high costs the problem of；
Communicated by the way of series connection, also overcome the problem of causing voltage difference higher using annular networking in conventional art.
Claims (9)
1. a kind of battery pack monitoring device, it is characterised in that including one group of main control unit and some groups of monitoring units, some groups of prisons
Control unit and condition monitoring is carried out to battery, further include isolation circuit all the way and some groups of level shifting circuits；Main control unit
Controller carries out data acquisition by sample circuit to the output state parameter of battery, so that the condition monitoring of complete battery pair；
Main control unit and monitoring unit are connected by order wire, and the signal of the order wire of main control unit and monitoring unit sends pin each
Pin is received by the signal of next group of monitoring unit order wire of level shifting circuit connection series connection；Last group prison of series connection
The signal for controlling unit communication line sends the signal reception pin that pin connects main control unit order wire by isolation circuit all the way.
2. battery pack monitoring device according to claim 1, it is characterised in that the isolation circuit is light-coupled isolation electricity
Road or switching tube level shifting circuit.
3. battery pack monitoring device according to claim 2, it is characterised in that the optical coupling isolation circuit uses model
The circuit formed for the opto-coupler chip of 6N137.
4. battery pack monitoring device according to claim 3, it is characterised in that the optical coupling isolation circuit includes optocoupler
Chip 6N137 and input terminal current-limiting resistance；The signal of the order wire of last group of monitoring unit sends pin connection opto-coupler chip
3 feet, the power supply signal of last group of monitoring unit passes through 2 feet that input terminal current-limiting resistance connects opto-coupler chip, opto-coupler chip
7 feet and 8 feet connection main control unit power pins, opto-coupler chip 5 feet ground connection, 6 feet and the main control unit of opto-coupler chip lead to
Believe that the signal of line receives pin connection.
5. battery pack monitoring device according to claim 2, it is characterised in that the switching tube level shifting circuit bag
Include first switch pipe, first switch pipe current-limiting resistance, second switch pipe, second switch pipe current-limiting resistance and second switch pipe pull-up
Resistance；The signal of the order wire of last group of monitoring unit sends pin and connects first switch by first switch pipe current-limiting resistance
Pipe control terminal, the positive pole of the one group of monitoring unit in one end connection left and right of the movable end of first switch pipe, first switch pipe
The other end of movable end connects the control terminal of second switch pipe, the movable end of second switch pipe by second switch pipe current-limiting resistance
One end ground connection, the other end of the movable end of second switch pipe passes through the electricity that second switch pipe pull-up resistor connects Ei main control units
Source cathode, while the other end of the movable end of second switch pipe is also directly connected to the signal reception pin of main control unit.
6. battery pack monitoring device according to claim 5, it is characterised in that the switching tube is triode or MOS
Pipe.
7. the battery pack monitoring device according to one of claim 1~6, it is characterised in that the level shifting circuit bag
Include and send terminal circuit and receiving terminal circuit；Transmitting terminal circuit arrangement is sent in the signal of main control unit or the order wire of monitoring unit
Pin, the signal that receiving terminal circuit is arranged in monitoring unit order wire receive pin；Sending terminal circuit includes transmitting terminal switching tube
With transmitting terminal current-limiting resistance, the signal of order wire sends control of the pin by transmitting terminal current-limiting resistance linkup transmit end switch pipe
End, movable end one end ground connection of transmitting terminal switching tube, the movable end other end connection receiving terminal circuit of transmitting terminal switching tube；Receive
Terminal circuit includes receiving terminal current-limiting resistance, receiving terminal pull down resistor and receiving terminal switching tube；The output signal for sending terminal circuit leads to
Cross the control terminal of receiving terminal current-limiting resistance connection receiving terminal switching tube, movable end one end connection receiving terminal electricity of receiving terminal switching tube
The power supply signal of monitoring unit, the other end of receiving terminal switching tube are grounded by receiving terminal pull down resistor, also directly connected where road
The signal of monitoring unit order wire receives pin where connecing receiving terminal circuit.
8. battery pack monitoring device according to claim 7, it is characterised in that last group monitoring of the series connection is single
The signal of the order wire of member sends pin and is connected with transmission terminal circuit, so that the battery pack monitoring device is monitored unit
Extension.
9. the battery pack monitoring device according to one of claim 1~6, it is characterised in that the power supply of the monitoring unit
The signal of signal and monitoring unit order wire sends pin and is connected to wire connection terminal, so that the battery pack monitoring device carries out
The reduction of monitoring unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720848714.7U CN207303271U (en) | 2017-07-13 | 2017-07-13 | Battery pack monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720848714.7U CN207303271U (en) | 2017-07-13 | 2017-07-13 | Battery pack monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207303271U true CN207303271U (en) | 2018-05-01 |
Family
ID=62451008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720848714.7U Expired - Fee Related CN207303271U (en) | 2017-07-13 | 2017-07-13 | Battery pack monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207303271U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923778A (en) * | 2018-06-22 | 2018-11-30 | 比飞力（深圳）科技有限公司 | A kind of logic level converting circuit and integrated circuit |
| CN110962680A (en) * | 2019-01-21 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Storage battery monitoring system, battery pack and electric automobile |
-
2017
- 2017-07-13 CN CN201720848714.7U patent/CN207303271U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923778A (en) * | 2018-06-22 | 2018-11-30 | 比飞力（深圳）科技有限公司 | A kind of logic level converting circuit and integrated circuit |
| CN110962680A (en) * | 2019-01-21 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Storage battery monitoring system, battery pack and electric automobile |
| CN110962680B (en) * | 2019-01-21 | 2021-03-23 | 宁德时代新能源科技股份有限公司 | Storage battery monitoring system, battery pack and electric automobile |
| US11760226B2 (en) | 2019-01-21 | 2023-09-19 | Contemporary Amperex Technology Co., Limited | Rechargeable battery monitoring system, battery pack and electric vehicle |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20200713 |
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| CF01 | Termination of patent right due to non-payment of annual fee |