CN207924105U - A kind of battery management system and its battery voltage detection circuit - Google Patents
A kind of battery management system and its battery voltage detection circuit Download PDFInfo
- Publication number
- CN207924105U CN207924105U CN201721677263.1U CN201721677263U CN207924105U CN 207924105 U CN207924105 U CN 207924105U CN 201721677263 U CN201721677263 U CN 201721677263U CN 207924105 U CN207924105 U CN 207924105U
- Authority
- CN
- China
- Prior art keywords
- resistance
- battery
- resistor
- operational amplifier
- connect
- 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
Landscapes
- Secondary Cells (AREA)
Abstract
This application discloses a kind of battery voltage detection circuits, including the battery and the corresponding detection unit of each battery being sequentially connected in series；First detection unit includes first resistor and second resistance；K detection units include：3rd resistor and the first end of the 5th resistance are connected to K anodes；3rd resistor second end is connect with the 4th resistance first end and operational amplifier first input end respectively；4th resistance second end is connect with K battery cathode；5th resistance second end is connect with the second input terminal of operational amplifier and controlled tr tube first end respectively；Operational amplifier output terminal is connect with controlled tr tube control terminal；Controlled tr tube second end is connect with the 6th resistance first end；6th resistance second end is connected to reference signal end.The application avoids operational amplifier input signal by electric resistance partial pressure to be influenced by low potential fail battery, effectively increases stability and the safety of circuit.Battery management system provided herein also has above-mentioned advantageous effect.
Description
Technical field
This application involves battery technology field, more particularly to a kind of battery management system and its battery voltage detection circuit.
Background technology
Battery management system (Battery Management System, BMS) is widely used in using battery as energy source
Equipment in, it can be used for carrying out sampling monitoring to cell voltage, to carry out corresponding overvoltage or under-voltage protection etc..
Referring to FIG. 1, Fig. 1 is the circuit structure diagram of battery voltage detection circuit in the prior art.As shown in Figure 1, n
Battery is sequentially connected in series, and each battery corresponds to a detection unit；Each detection unit in addition to first detection unit all has
Identical circuit structure.
By taking the corresponding third detection units of third battery cell3 as an example：It includes operational amplifier a3, resistance R3A, controllable
Switching tube q3 and resistance R3B.Since operational amplifier a3 is by the current potential clamper of two input terminal to same level, electricity
The voltage at the both ends resistance R3A is equal to the voltage of third battery cell3；Electric current on resistance R3A as a result, while being also resistance R3B
On electric current, be proportional to the voltage of third battery cell3.So by the voltage v3 at the both ends detection resistance R3B, i.e.,
The voltage of third battery cell3 can be obtained.
However, critical defect there are one battery voltage detection circuit tools shown in FIG. 1, i.e., the battery failures at low potential
When, such as it leads to output voltage because of damage when being 0, the voltage detecting of the battery at high potential will seriously be affected.Example
Such as, when the voltage of the first battery cell1 is 0, in second detection unit the current potential of operational amplifier a2 first input ends by
It influences, causes the output valve of second detection unit also close to being 0, can not correctly reflect the voltage swing of the second battery cell2.
At this point, if being not provided with fault detection circuit in system, the problem of being easy to occur to overcharge the second battery cell2, production
The hidden danger of raw explosion.
It is this as it can be seen that using which kind of battery voltage detection circuit to effectively improve stability and the safety of circuit
Field technology personnel technical problem urgently to be resolved hurrily.
Utility model content
The application's is designed to provide a kind of battery management system and its battery voltage detection circuit, effectively to carry
The stability of high circuit and safety.
In order to solve the above technical problems, the application provides a kind of battery voltage detection circuit, including：Battery module and detection
Module；
Wherein, the battery module includes the first battery to N batteries；The first battery cathode ground connection, K batteries
Cathode is connect with the anode of K-1 batteries；N is the integer not less than 2, and K is the integer more than 1 and no more than N；
The detection module includes first detection unit to N detection units；
Wherein, the first detection unit includes first resistor and second resistance；The first end of the first resistor and institute
The anode connection of the first battery is stated, the second end of the first resistor is connect with the first end of the second resistance, and as institute
State the output end of first detection unit；The second end of the second resistance is connected to reference signal end；
K detection units include 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, operational amplifier and controllably open
Guan Guan；The first end of the 3rd resistor and the first end of the 5th resistance are connected to the anode of the K batteries；It is described
The second end of 3rd resistor is connect with the first input end of the first end of the 4th resistance and the operational amplifier respectively；Institute
The second end for stating the 4th resistance is connect with the cathode of the K batteries；The second end of 5th resistance respectively with the operation
Second input terminal of amplifier is connected with the first end of the controlled tr tube；The output end of the operational amplifier with it is described can
The control terminal connection of switching tube is controlled, positive power source terminal is connect with the anode of the N batteries, negative power end and first battery
Cathode connects；The second end of the controlled tr tube is connect with the first end of the 6th resistance, and detects list as the K
The output end of member；The second end of 6th resistance is connected to the reference signal end.
Optionally, the first input end of the operational amplifier is normal phase input end, and the second of the operational amplifier is defeated
It is inverting input to enter end, and the controlled tr tube is PMOS tube.
Optionally, the first input end of the operational amplifier is inverting input, and the second of the operational amplifier is defeated
It is normal phase input end to enter end, and the controlled tr tube is NMOS tube.
Optionally, the reference signal end is ground terminal.
Optionally, the ratio between the 3rd resistor of each K detection units and the resistance value of the 4th resistance are impartial
In the ratio between the resistance value of the first resistor and the second resistance.
Optionally, the voltage of first battery and the K batteries is equal.
Optionally, the ratio between the resistance value of 3rd resistor of the first resistor and each K detection units is：
1：1：1/2：1/3：…：1/(N-1).
Optionally, the 5th resistance of each K detection units is hindered with the 3rd resistor of the second detection unit
It is worth equal.
Present invention also provides a kind of battery management systems, including any battery voltage detection circuit as above.
Battery voltage detection circuit provided herein includes：Battery module and detection module；Wherein, battery module packet
The first battery is included to N batteries；First battery cathode is grounded, and the cathode of K batteries is connect with the anode of K-1 batteries；Detection
Module includes first detection unit to N detection units；First detection unit includes first resistor and second resistance；K is detected
Unit includes 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, operational amplifier and controlled tr tube；3rd resistor
First end and the first end of the 5th resistance are connected to the anode of K batteries；The second end of 3rd resistor respectively with the 4th resistance
First end connected with the first input end of operational amplifier；The second end of 4th resistance is connect with the cathode of K batteries；5th
The second end of resistance is connect with the first end of the second input terminal of operational amplifier and controlled tr tube respectively；Operational amplifier
The control terminal of output end and controlled tr tube connects, and positive power source terminal is connect with the anode of N batteries, negative power end and the first battery
Cathode connection；The second end of controlled tr tube is connect with the first end of the 6th resistance, and as the output of K detection units
End；The second end of 6th resistance is connected to reference signal end.
As it can be seen that compared with the prior art, battery voltage detection circuit provided herein is acted on by the partial pressure of resistance
Avoid the input signal of operational amplifier first input end is influenced by low potential fail battery, so that each battery
Detection function between detection unit is relatively independent, and the coupling between reducing effectively increases entire cell voltage
The stability of detection circuit and safety.Battery management system provided herein similarly has above-mentioned advantageous effect.
Description of the drawings
In order to illustrate more clearly of the technical solution in the prior art and the embodiment of the present application, below will to the prior art and
Attached drawing to be used is needed to make brief introduction in the embodiment of the present application description.Certainly, the attached drawing in relation to the embodiment of the present application below
A part of the embodiment in only the application of description is not paying creativeness to those skilled in the art
Under the premise of labour, other attached drawings can also be obtained according to the attached drawing of offer, the other accompanying drawings obtained also belong to the application
Protection domain.
Fig. 1 is a kind of circuit structure diagram of battery voltage detection circuit provided in the prior art；
A kind of circuit structure diagram for battery voltage detection circuit that Fig. 2 is provided by the embodiment of the present application.
Specific implementation mode
The core of the application is to provide a kind of battery management system and its battery voltage detection circuit, effectively to carry
The stability of high circuit and safety.
In order to which technical solutions in the embodiments of the present application is more clearly and completely described, below in conjunction with this Shen
Attached drawing that please be in embodiment, technical solutions in the embodiments of the present application are introduced.Obviously, described embodiment is only
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Referring to FIG. 2, a kind of circuit structure diagram for battery voltage detection circuit that Fig. 2 is provided by the embodiment of the present application,
Include mainly battery module 1 and detection module 2；
Wherein, battery module 1 includes the first battery E1To N batteries EN；First battery E1Cathode is grounded, K batteries EK's
Cathode and K-1 batteries EK-1Anode connection；N is the integer not less than 2, and K is the integer more than 1 and no more than N；
Detection module 2 includes first detection unit 21 to N detection units 2N；
Wherein, first detection unit 21 includes first resistor R1 and second resistance R2；The first end of first resistor R1 and the
One battery E1Anode connection, the second end of first resistor R1 connect with the first end of second resistance R2, and is detected as first
The output end of unit 21；The second end of second resistance R2 is connected to reference signal end；
K detection units 2K include 3rd resistor R3_K, the 4th resistance R4_K, the 5th resistance R5_K, the 6th resistance R6_K,
Operational amplifier AKWith controlled tr tube QK；The first end of 3rd resistor R3_K and the first end of the 5th resistance R5_K are connected to
K batteries EKAnode；The second end of the 3rd resistor R3_K first end and operational amplifier A with the 4th resistance R4_K respectivelyK's
First input end connects；The second end of 4th resistance R4_K and K batteries EKCathode connection；The second end of 5th resistance R5_K
Respectively with operational amplifier AKThe second input terminal and controlled tr tube QKFirst end connection；Operational amplifier AKOutput end
With controlled tr tube QKControl terminal connection, positive power source terminal and N batteries ENAnode connection, negative power end and the first battery E1
Cathode connection；Controlled tr tube QKSecond end connect with the first end of the 6th resistance R6_K, and as K detection units 2K
Output end；The second end of 6th resistance R6_K is connected to reference signal end.
In order to solve the battery failures at low potential in the prior art can influence battery at high potential testing result this
Resistor voltage divider circuit is connected in parallel on the anode of each battery by problem, the battery voltage detection circuit that the embodiment of the present application is provided
With cathode both ends.
As shown in Fig. 2, in first detection unit 21, the first battery is connected in parallel on after first resistor R1 and second resistance R2 series connection
E1Anode and cathode both ends, the two partial pressure output the also output as first detection unit 21.
In K detection units 2K, K batteries E is connected in parallel on after 3rd resistor R3_K and the 4th resistance R4_K series connectionKJust
The partial pressure at pole and cathode both ends, the two exports VBKIt is admitted to operational amplifier AKFirst input end.Due to operational amplifier AK
Clamping action, therefore the current potential (V of two input terminalBKAnd VCK) equal, the 5th resistance R5_K and 3rd resistor R3_ as a result,
K is equivalent to parallel connection, and the voltage at the two both ends is equal, with K batteries EKVoltage at fixed proportion, therefore, flow through the 5th electricity
Hinder the electric current I of R5_KCK, also flow through the electric current of the 6th resistance R6_K, also with K batteries EKVoltage positive correlation.Due to
Current detecting is generally all realized by voltage detecting, therefore, passes through the voltage V at the 6th both ends resistance R6_K of sample detectingK, you can
It calculates and obtains K batteries EKVoltage swing, so that battery management system judges the cell health state.
As it can be seen that the battery voltage detection circuit that the embodiment of the present application is provided, fortune is avoided by the partial pressure effect of resistance
Calculate amplifier AKThe input signal of first input end is influenced by low potential fail battery, so that the detection list of each battery
Detection function between member is relatively independent, the coupling between reducing, and effectively increases entire battery voltage detection electricity
The stability on road and safety.
Battery voltage detection circuit provided herein, on the basis of the above embodiments：
As a kind of preferred embodiment, operational amplifier AKFirst input end be normal phase input end, operational amplifier AK's
Second input terminal is inverting input, controlled tr tube QKFor PMOS tube；
Alternatively, operational amplifier AKFirst input end be inverting input, operational amplifier AKThe second input terminal be just
Phase input terminal, controlled tr tube QKFor NMOS tube.
Specifically, in the battery voltage detection circuit that the embodiment of the present application is provided, controlled tr tube QKEnergy consumption can be selected
Low metal-oxide-semiconductor, such as PMOS tube, i.e., as shown in Figure 2；Certain those skilled in the art can also use NMOS tube and corresponding
Circuit.In addition, those skilled in the art can also select other such as triodes, IGBT controllably to open according to actual use situation
Guan Guan, this embodiment of the present application is not limited thereto.
As a kind of preferred embodiment, reference signal end is ground terminal.
Usually, it for ease of calculation and measures, usually used ground terminal, which is used as, in selectable circuit refers to signal end.
As a kind of preferred embodiment, the resistance of the 3rd resistor R3_K and the 4th resistance R4_K of each K detection units 2K
The ratio between value is equal to the ratio between the resistance value of first resistor R1 and second resistance R2.
According to described previously, the voltage at 3rd resistor R3_K and the 5th both ends resistance R5_K is equal, therefore 3rd resistor R3_
The ratio between the resistance value of K and the 4th resistance R4_K determine the voltage at the 5th both ends resistance R5_K, i.e.,：
V5_K=V3_K=R4_K/ (R3_K+R4_K) * VEK；
Wherein, V5_K is the voltage at the 5th both ends resistance R5_K；V3_K is the voltage at the both ends 3rd resistor R3_K, VEKIt is
K batteries EKVoltage；It can thus be concluded that：
V5_2=R4_2/ (R3_2+R4_2) * VE2；
V5_3=R4_3/ (R3_3+R4_3) * VE3；
…；
V5_N=R4_N/ (R3_N+R4_N) * VEN。
Therefore, if enabling the ratio between resistance value of 3rd resistor R3_K and the 4th resistance R4_K of each K detection units 2K impartial
In the ratio between the resistance value of first resistor R1 and second resistance R2, then have：
Then for each K detection unit 2K, the 5th resistance R5_K both end voltages and K batteries EKVoltage VEKRatio
It is constant k：
V5_K=k*VEK。
As a kind of preferred embodiment, the first battery E1With K batteries EKVoltage be equal, i.e.,：
VE1=VE2=VE3=...=VEN=VE。
Usually, battery pack in practical applications is made of the identical battery of model, is also beneficial to simultaneously in this way
Simplify the detection to multiple batteries and condition adjudgement.When the voltage of each battery is equal, binding constant k, then each 5th is electric
It is also equal to hinder the voltage V5_K at the both ends R5_K：
V5_K=k*VE。
As a kind of preferred embodiment, the resistance value of the 3rd resistor R3_K of first resistor R1 and each K detection units 2K
The ratio between be：
R1：R3_2：R3_3：R3_4：…：R3_N=1：1：1/2：1/3：…：1/(N-1).
Specifically, in conjunction with the 3rd resistor R3_K and the 4th resistance R4_K of each of described K detection units 2K above
The ratio between resistance value be equal to the ratio between the resistance value of first resistor R1 and second resistance R2, then can obtain：
(R1+R2)：(R3_2+R4_2)：(R3_3+R4_3)：…：(R3_N+R4_N)
=1：1：1/2：1/3：…：1/(N-1).
Again because the voltage of each battery is equal, therefore, the electric current I to circulate on first resistor R1A1With each 3rd resistor
The electric current I to circulate on R3_KAKThe ratio between be：
IA1：IA2：IA3：…：IAN=1：1：2：3：…：(N-1).
If enabling IA1=VE/ (R1+R2)=I0；
IA2=VE/ (R3_2+R4_2)=I0；
Then have：
IA3=2I0；
IA4=3I0；
…；
IAN=(N-1) I0。
As a kind of preferred embodiment, the 5th resistance R5_K of each K detection units 2K with second detection unit 22
3rd resistor R3_2 resistance values it is equal, i.e.,：
R3_2=R5_2=R5_3=...=R5_N.
Wherein, since the 3rd resistor R3_2 of second detection unit 22 and the 5th both ends resistance R5_2 are equivalent to parallel connection, and
R3_2=R5_2, therefore, the electric current I to circulate on the 5th resistance R5_2C2With the electric current I to circulate on 3rd resistor R3_2A2It is equal,
I.e.：
IC2=IA2=I0；
It is k*V again because the voltage V5_K at the both ends each 5th resistance R5_K is equalE, and R5_2=R5_3=...=
R5_N, therefore the electric current I to circulate on each 5th resistance R5_KCKIt is all equal, i.e.,：
IC2=IC3=IC4=...=ICN=I0。
The first battery E can be obtained according to Kirchhoff's theorem as a result,1The port B of anode1The electric current I at placeB1With K batteries EK
The port B of anodeKThe electric current I at placeBKFor：
IB1=IA2-IA1=I0-I0=0；
IB2=IA3-IA2-IC2=2I0-I0-I0=0；
IB3=IA4-IA3-IC3=3I0-2I0-I0=0；
…；
IBN=IAN-IA(N-1)-IC(N-1)=(N-1) I0-(N-2)I0-I0=0.
Since the electric current at each battery port is zero, it is homogeneous that the electric current consumed on each battery can be obtained
Deng：
I1=I2=I3=I4=...=IN。
As it can be seen that the battery voltage detection circuit that the embodiment of the present application is provided can also further improve institute on each battery
The phenomenon that current imbalance of consumption.It is arranged by rational circuit so that the electric current flowed at each battery port is
Zero, that is, so that the electric current consumed on each battery is equal, the Expenditure Levels of each battery are balanced, so as to effectively
The service life for improving battery pack, further increases the stability of circuit, reduces the maintenance cost of circuit.
It should be noted that the application does not limit the design parameter of each component, model etc. in circuit, this
Field technology personnel voluntarily can select and be arranged according to practical situations, to realize technical solution provided herein
Advantageous effect.
Include the battery voltage detection as described in any of the above embodiment present invention also provides a kind of battery management system
Circuit.
The battery voltage detection that the specific implementation mode of battery management system provided herein is described above with is electric
Road can just repeat no more here to should refer to.
Each embodiment is described by the way of progressive in the application, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.
It should be noted that in present specification, the relational terms of such as " first " and " second " etc are used merely to
One entity is either operated and is distinguished with another entity or operation, without necessarily requiring or implying these entities or
There are any actual relationship or orders between person's operation.In addition, the terms "include", "comprise" or its any other
Variant is intended to non-exclusive inclusion, so that process, circuit, article or equipment including a series of elements are not only
Including those elements, but also include other elements that are not explicitly listed, or further includes for this process, circuit, object
Product or the intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...",
It is not precluded in process, circuit, article or the equipment including the element that there is also other identical elements.
Technical solution provided herein is described in detail above.Specific case used herein is to this Shen
Principle and embodiment please is expounded, the explanation of above example is only intended to help understand the application circuit and its
Core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the application principle
Under, can also to the application, some improvement and modification can also be carried out, these improvement and modification also fall into the protection of the application claim
In range.
Claims (9)
1. a kind of battery voltage detection circuit, which is characterized in that including：Battery module and detection module；
Wherein, the battery module includes the first battery to N batteries；The first battery cathode ground connection, the cathode of K batteries
It is connect with the anode of K-1 batteries；N is the integer not less than 2, and K is the integer more than 1 and no more than N；
The detection module includes first detection unit to N detection units；
Wherein, the first detection unit includes first resistor and second resistance；The first end of the first resistor and described the
The anode connection of one battery, the second end of the first resistor connect with the first end of the second resistance, and as described the
The output end of one detection unit；The second end of the second resistance is connected to reference signal end；
K detection units include 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, operational amplifier and controllable switch
Pipe；The first end of the 3rd resistor and the first end of the 5th resistance are connected to the anode of the K batteries；Described
The second end of three resistance is connect with the first input end of the first end of the 4th resistance and the operational amplifier respectively；It is described
The second end of 4th resistance is connect with the cathode of the K batteries；The second end of 5th resistance is put with the operation respectively
Second input terminal of big device is connected with the first end of the controlled tr tube；The output end of the operational amplifier with it is described controllable
The control terminal of switching tube connects, and positive power source terminal is connect with the anode of the N batteries, and negative power end is negative with first battery
Pole connects；The second end of the controlled tr tube is connect with the first end of the 6th resistance, and as the K detection units
Output end；The second end of 6th resistance is connected to the reference signal end.
2. battery voltage detection circuit according to claim 1, which is characterized in that the first input of the operational amplifier
End is normal phase input end, and the second input terminal of the operational amplifier is inverting input, and the controlled tr tube is PMOS tube.
3. battery voltage detection circuit according to claim 1, which is characterized in that the first input of the operational amplifier
End is inverting input, and the second input terminal of the operational amplifier is normal phase input end, and the controlled tr tube is NMOS tube.
4. battery voltage detection circuit according to claim 1, which is characterized in that the reference signal end is ground terminal.
5. battery voltage detection circuit according to any one of claims 1 to 4, which is characterized in that each K detections
The 3rd resistor of unit and the ratio between the resistance value of the 4th resistance are equal to the first resistor and the second resistance
The ratio between resistance value.
6. battery voltage detection circuit according to claim 5, which is characterized in that first battery and K electricity
The voltage in pond is equal.
7. battery voltage detection circuit according to claim 6, which is characterized in that the first resistor and each described the
The ratio between the resistance value of 3rd resistor of K detection units is：
1：1：1/2：1/3：…：1/(N-1).
8. battery voltage detection circuit according to claim 7, which is characterized in that the of each K detection units
Five resistance are equal with the 3rd resistor resistance value of second detection unit.
9. a kind of battery management system, which is characterized in that including such as claim 1 to 8 any one of them battery voltage detection
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721677263.1U CN207924105U (en) | 2017-12-06 | 2017-12-06 | A kind of battery management system and its battery voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721677263.1U CN207924105U (en) | 2017-12-06 | 2017-12-06 | A kind of battery management system and its battery voltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207924105U true CN207924105U (en) | 2018-09-28 |
Family
ID=63606410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721677263.1U Active CN207924105U (en) | 2017-12-06 | 2017-12-06 | A kind of battery management system and its battery voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207924105U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111435152A (en) * | 2019-01-14 | 2020-07-21 | 南京苏梦电子科技有限公司 | Battery voltage detection circuit and battery voltage detection module of battery pack |
-
2017
- 2017-12-06 CN CN201721677263.1U patent/CN207924105U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111435152A (en) * | 2019-01-14 | 2020-07-21 | 南京苏梦电子科技有限公司 | Battery voltage detection circuit and battery voltage detection module of battery pack |
| CN111435152B (en) * | 2019-01-14 | 2022-06-21 | 无锡有容微电子有限公司 | Battery voltage detection circuit and battery voltage detection module of battery pack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207518263U (en) | A kind of current foldback circuit | |
| CN201821092U (en) | Protective circuit for lithium power battery packs | |
| CN101752624B (en) | Equalizing charge method and equalizing charge device for battery | |
| CN105429226A (en) | High-capacity charging-discharging battery management system | |
| CN204044308U (en) | A kind of equalizing circuit abnormal detector of series battery | |
| CN107870283A (en) | BMS wiring testing devices and method | |
| CN203688636U (en) | System for detecting voltage of single battery unit of series battery pack | |
| CN201311486Y (en) | Detection device for terminal power | |
| CN208015388U (en) | A kind of protection circuit of battery pack | |
| CN204243847U (en) | A kind of battery cell voltage balance circuit of electrokinetic cell bag | |
| CN201629586U (en) | Battery equalizing charge device | |
| CN106371031B (en) | Battery pack disconnection detection method and device | |
| CN103048579B (en) | Monitoring device for insulation between direct-current buses and between buses and ground | |
| CN207924105U (en) | A kind of battery management system and its battery voltage detection circuit | |
| CN209516650U (en) | A kind of low-power consumption is from balancing battery voltage sampling circuit | |
| CN102496988B (en) | Battery control circuit, system and method | |
| CN109142993A (en) | A kind of multifunction insulating detector suitable for DC power system | |
| CN103926516B (en) | Online diode detection circuit | |
| CN201113493Y (en) | Battery voltage sampling circuit | |
| CN102253346B (en) | Method and device for automatically testing battery charging | |
| CN105403838A (en) | Voltages measurement device of multiple portable cell monomers | |
| CN201788261U (en) | Switching value detection circuit | |
| CN103855689B (en) | Cascaded battery protection circuit and system | |
| CN102122834B (en) | Power battery management chip supporting multi-series connection | |
| CN203299255U (en) | Voltage detection circuit formed by connecting a plurality of electric core units in series and battery protection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191125 Address after: 200436 second, 11, 12, Lane 299, wunshui Road, Jingan District, Shanghai. Patentee after: China Resources Silver Technology (Shanghai) Co., Ltd. Address before: 210015 fourth, 263 Jianning Road, Gulou District, Nanjing, Jiangsu. Patentee before: Nanjing Sumeng Electronic Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210111 Address after: 214135 -6, Linghu Avenue, Wuxi Taihu international science and Technology Park, Wuxi, Jiangsu, China, 180 Patentee after: China Resources micro integrated circuit (Wuxi) Co., Ltd Address before: 200436 second, 11, 12, Lane 299, wunshui Road, Jingan District, Shanghai. Patentee before: CHINA RESOURCES POWTECH (SHANGHAI) Co.,Ltd. |