CN207053219U - Batteries in parallel connection group voltage balancing device and batteries in parallel connection group - Google Patents
Batteries in parallel connection group voltage balancing device and batteries in parallel connection group Download PDFInfo
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- CN207053219U CN207053219U CN201720918808.7U CN201720918808U CN207053219U CN 207053219 U CN207053219 U CN 207053219U CN 201720918808 U CN201720918808 U CN 201720918808U CN 207053219 U CN207053219 U CN 207053219U
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- battery
- batteries
- parallel connection
- connection group
- voltage
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Abstract
Batteries in parallel connection group voltage balancing device, multiple single batteries applied to parallel connection, including battery voltage detector and multiple power switch, one end that the power switch is not connected with single battery is connected with feeder ear, each single battery is connected with a battery voltage detector, the detection means output signal is data signal, and detection means signal output part is connected with a digital signal processing device；Also include a charge switch network, the charge switch network can connect the positive pole of the single battery of any two, while isolate with other single anodes.The invention also discloses a kind of batteries in parallel connection group.The utility model is designed using switching network, realizes the selectivity processing to supplying cell, the working condition and charging and discharging state of supplying cell can be controlled, realize electric voltage equalization, the life-span of battery pack is extended, while requirement on devices is greatly reduced, reduces cost.
Description
Technical field
The utility model belongs to electronic power supply field, is related to a kind of battery management technique, and in particular to a kind of batteries in parallel connection
Group voltage balancing device and a kind of batteries in parallel connection group.
Background technology
As the miniaturization of battery and energy ratio improve constantly, occur various by battery powered electrical equipment, example
Such as unmanned plane, electric automobile, battery truck, by taking electric automobile as an example, electric automobile refers to, using vehicle power as power, use motor
Driving moment travels, and meets road traffic, the vehicle of security legislation requirements.Due to the relatively conventional automobile of effect on environment compared with
Small, its prospect is had an optimistic view of extensively.The length of the mileages of continuation of electric automobile depends on the size of vehicle mounted dynamic battery capacity, vehicle-mounted
The weight of electrokinetic cell depends on selecting which kind of electrokinetic cell such as plumbic acid, zinc carbon, lithium battery etc., and the proportion of battery, compares work(
Rate, than indexs such as energy.
But during battery use, due to the difference of cell output voltage caused by commercial process, cause electricity
Pond power output is uneven, and in use, and this species diversity is such as right because the discharge principle of battery can persistently be amplified
In the battery of output voltage, output current is larger, and output current causes battery-heating to increase greatly, causes internal resistance to be dropped after battery-heating
It is low, electric current increase is further resulted in, positive feedback is formed and make it that battery last generates heat and excess load power supply, battery life significantly contract
It is small.
Utility model content
To overcome technological deficiency existing for prior art, the utility model discloses a kind of batteries in parallel connection group electric voltage equalization dress
Put and a kind of batteries in parallel connection group.
Batteries in parallel connection group voltage balancing device described in the utility model, applied to multiple single batteries of parallel connection, including electricity
Cell voltage detection means and multiple power switch, each single battery are connected with a power switch, the power switch not with
One end of single battery connection is connected with feeder ear, and each single battery is connected with a battery voltage detector, institute
It is data signal to state detection means output signal, and detection means signal output part is connected with a digital signal processing device；
Also include a charge switch network, the charge switch network can connect the single battery of any two just
Pole, while isolate with other single anodes.
Preferably, the battery voltage detector is connected with anode.
Preferably, the battery voltage detector is analog-digital converter.
Preferably, what the charge switch network included that multiple one end and each single anode connect respectively balanced opens
Close, the equalizer switch other end is connected with electric voltage equalization end.
Preferably, the digital signal processing device is built-in with clock generator.
Preferably, each single battery is identical with the position of battery voltage detector.
The invention also discloses a kind of batteries in parallel connection group, employs any one electric voltage equalization dress as described above
Put.
Using batteries in parallel connection group voltage balancing device, batteries in parallel connection group and its control method described in the utility model, tool
There is following superiority：
One, is designed using switching network, realizes the selectivity processing to supplying cell, can be to the work of supplying cell
State and charging and discharging state are controlled, and realize electric voltage equalization.
Two, can effectively realize the electric voltage equalization between each single battery, reduce voltage differences, reduce high-tension battery
Voltage, extend the life-span of battery pack.
Three, system architectures are simple, and number of devices is few, completely compatible with existing parallel operation battery structure, are suitable for difference
The voltage balance control of the single battery of species.
Brief description of the drawings
Fig. 1 is a kind of embodiment structure schematic elevation view of batteries in parallel connection group described in the utility model, attached in figure
Icon is signed referred to as ADC- analog-digital converters, DSP- digital signal processing devices, VO- feeder ears, VEX- electric voltage equalizations end, K1A-
Equalizer switch, K1B- power switch, C1, C2, C3, C4 represent different single batteries in figure, K2, K3, K4 represent respectively with C2,
The switches set of C3, C4 connection.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in further detail.
Batteries in parallel connection group voltage balancing device described in the utility model, applied to multiple single batteries of parallel connection, including electricity
Cell voltage detection means and multiple power switch, each single battery are connected with a power switch, the power switch not with
One end of single battery connection is connected with feeder ear, and each single battery is connected with a battery voltage detector, institute
It is data signal to state detection means output signal, and detection means signal output part is connected with a digital signal processing device；
Also include a charge switch network, the charge switch network can connect the single battery of any two just
Pole, while isolate with other single anodes；
In embodiment shown in Fig. 1, apply in a four cell parallel battery packs；Wherein each single battery
C1, C2, C3, C4 are respectively connected with two switches, such as battery C1 is connected with equalizer switch K1A and power switch K1B, with C2, C3,
Switches set K2, K3, K4 of C4 connections also possess an equalizer switch and power switch respectively, to simplify diagram, do not distinguish in Fig. 1
Complete sign.
Assuming that each power switch closes under original state, each equalizer switch disconnects, and each single battery is with simultaneously
Connection state is connected with feeder ear VO and to the power supply for electrical equipment being connected with feeder ear VO, each single anode and a mould
The anode voltage analog signal detected is converted into data signal by number converter ADC connections, analog-digital converter.Battery electricity
Detection means is pressed to take more multi-part in addition to ADC, such as first with operational amplifier by detectable voltage signals and a base
ADC is inputted again after quasi- value error amplification to be sampled, or a current sampling resistor of being connected on battery, by sampling resistor
Both ends pressure differential detection characterizes cell voltage；It is electric because each single battery of actual use is all demarcation performance identical battery
Difference between pond output voltage and electric current is not too large, and the absolute value of detection cell voltage in itself has no too big meaning, still
Due to the presence of difference, the drastically shortening of battery life is may still result in, therefore the effect of detection means mainly detects
One digital value that can characterize battery voltage value, so as to pick out voltage highest and the minimum two single batteries of voltage.
For batteries in parallel connection group, in the case where not considering conductor resistance, connection resistance and switch conduction resistance, due to simultaneously
It is equal everywhere to join voltage, the voltage of each battery also can be equal after linking together in theory, single due to above-mentioned resistance be present
One cell output current is different, causes these ohmically pressure drops different so that voltage of each single battery in power supply is not
Together, therefore the position of single battery and battery voltage detector should be preferably identical, eliminates access point resistance difference and voltage is adopted
Collecting the error brought influences.
Digital signal processing device filters out two with voltage max and minimum value according to the data signal of input
Single battery, for example, in the embodiment shown in Fig. 1, according to testing result, single battery C1 voltage highests, single electricity
Pond C4 voltages are minimum, and the power switch that digital signal processing device controls the two batteries to connect disconnects, and stops to feeder ear VO
Power supply, and close the equalizer switch that the two batteries are connected so that the positive pole of two batteries is connected with electric voltage equalization end, this
When high-tension battery C1 charged from the battery C4 of trend low-voltage, so as to realize battery C1 and battery C4 electric voltage equalization.Institute
State digital signal processing device and complete following functions：According to the data signal of input, each single cell voltage is judged most
High level and minimum, and control each power switch and charge switch network.The function above that digital signal processing device is realized,
It is in the art very simple program composition, belongs to prior art, those skilled in the art can easily realize.
In the utility model, digital signal processing device uses instant detection technique, switches the work of each switch at any time
State, such as when foregoing battery C1 and C4 realizes electric voltage equalization, each ADC still persistently detects each single cell voltage, it is real
After existing electric voltage equalization, single battery C2 is likely to become voltage highest battery in four batteries, and single battery C3 is likely to become four
The minimum battery of voltage in individual battery, now digital signal processing device then control the power switch for connecting single battery C2 and C3
Disconnect, and close the power switch for connecting single battery C1 and C4, simultaneously switch off the equalizer switch for connecting single battery C1 and C4,
Closure connects single battery C2 and C3 equalizer switch, realizes the electric voltage equalization between C2 and C3.Realize dynamic equalization control and
Immediately during detection, can utilize increases clock generator in digital signal processing device produces clock signal, to inspection
Survey voltage and switching switch motion synchronizes management, reduce the possibility that malfunction and operation conflict occur, such as can set
Put and start new voltage detecting in rising edge clock signal, in this cycle trailing edge or the rising edge in next cycle to each after detection
Individual switch is controlled switching, so as to preferably realize that sequential is correct.
In embodiment shown in Fig. 1, charge switch network by it is multiple be connected with each single anode it is equal
Weighing apparatus switch composition, each equalizer switch other end link together, i.e., are connected, pass through with the electric voltage equalization end VEX shown in Fig. 1
Control different equalizer switches, it is possible to achieve the interconnection of any two anode, and with the positive pole of other unselected batteries
Isolation.Charge switch network can certainly it is more complicated or different by other in a manner of realize, disclosed in the utility model
This mode is relatively simple.
As can be seen here, the time-sharing multiplex of switch multiplexing and battery is realized in the utility model using switching network so that appoint
In what, the balanced of battery is carried out in dynamic all the time period, while does not influence the dynamic equilibrium power supply of battery, for N number of parallel connection
Single battery, it is feeder ear continued power whenever to have N-2 battery, while constantly realizes voltage dynamic equilibrium, phase
The high-precision adc of costliness is needed to use accurately to detect the absolute value of cell voltage to traditional battery voltage detection；This practicality is new
In type, due to the voltage difference being only concerned between single battery, and dynamic equilibrium is used so that the requirement to ADC accuracy of detection
It is greatly reduced, even if ADC detections have error, the error is also offset by mathematic interpolation, and due to dynamic equilibrium mode, is made
The detection error for obtaining ADC hardly produces substantial effect to poised state, reduces product cost.
Although embodiment described in the utility model only discloses the situation of four single cell parallels, it is apparent that
Those skilled in the art can arbitrarily increase branch road according to the utility model content, realize the batteries in parallel connection of more single batteries
Network structure.
Using the batteries in parallel connection group and its control method of voltage balance management described in the utility model, have following superior
Property：
One, is designed using switching network, realizes the selectivity processing to supplying cell, can be to the work of supplying cell
State and charging and discharging state are controlled, and realize electric voltage equalization.
Two, can effectively realize the electric voltage equalization between each single battery, reduce voltage differences, reduce high-tension battery
Voltage, extend the life-span of battery pack.
Three, system architectures are simple, and number of devices is few, completely compatible with existing parallel operation battery structure, are suitable for difference
The voltage balance control of the single battery of species.
Previously described is each preferred embodiment of the present utility model, the preferred embodiment in each preferred embodiment
If not obvious contradictory or premised on a certain preferred embodiment, each preferred embodiment can be arbitrarily superimposed
It is applied in combination, the design parameter in the embodiment and embodiment is merely to clearly state the utility model of utility model people
Verification process, and be not used to limit scope of patent protection of the present utility model, scope of patent protection of the present utility model still with
Its claims is defined, every equivalent structure change made with specification of the present utility model and accompanying drawing content, similarly
It should be included in the scope of protection of the utility model.
Claims (7)
1. batteries in parallel connection group voltage balancing device, multiple single batteries applied to parallel connection, it is characterised in that including cell voltage
Detection means and multiple power switch, each single battery are connected with a power switch, the power switch not with single electricity
One end of pond connection is connected with feeder ear, and each single battery is connected with a battery voltage detector, the detection
Device output signal is data signal, and detection means signal output part is connected with a digital signal processing device；
Also include a charge switch network, the charge switch network can connect the positive pole of the single battery of any two, together
When isolate with other single anodes.
2. batteries in parallel connection group voltage balancing device as claimed in claim 1, it is characterised in that the battery voltage detector
It is connected with anode.
3. batteries in parallel connection group voltage balancing device as claimed in claim 1, it is characterised in that the battery voltage detector
For analog-digital converter.
4. batteries in parallel connection group voltage balancing device as claimed in claim 1, it is characterised in that the charge switch network includes
The equalizer switch that multiple one end are connected respectively with each single anode, the equalizer switch other end connect with electric voltage equalization end
Connect.
5. batteries in parallel connection group voltage balancing device as claimed in claim 1, it is characterised in that the digital signal processing device
It is built-in with clock generator.
6. batteries in parallel connection group voltage balancing device as claimed in claim 1, it is characterised in that each single battery and battery electricity
Press the position of detection means identical.
7. batteries in parallel connection group, it is characterised in that employ voltage balancing device as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720918808.7U CN207053219U (en) | 2017-07-27 | 2017-07-27 | Batteries in parallel connection group voltage balancing device and batteries in parallel connection group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720918808.7U CN207053219U (en) | 2017-07-27 | 2017-07-27 | Batteries in parallel connection group voltage balancing device and batteries in parallel connection group |
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| Publication Number | Publication Date |
|---|---|
| CN207053219U true CN207053219U (en) | 2018-02-27 |
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|---|---|---|---|
| CN201720918808.7U Expired - Fee Related CN207053219U (en) | 2017-07-27 | 2017-07-27 | Batteries in parallel connection group voltage balancing device and batteries in parallel connection group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149683A (en) * | 2018-07-27 | 2019-01-04 | 湖北工业大学 | A kind of restructural equalizing circuit becoming battery pack structure |
-
2017
- 2017-07-27 CN CN201720918808.7U patent/CN207053219U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149683A (en) * | 2018-07-27 | 2019-01-04 | 湖北工业大学 | A kind of restructural equalizing circuit becoming battery pack structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190404 Address after: 610000 No. 401 Sheng'an Street, Chengdu High-tech Zone, Sichuan Province, 1 Building, 2 Units, 16 Floors, 1604 Patentee after: Sichuan Rituo Energy Technology Co., Ltd. Address before: 400039 No. 1, Huangyang Road, Jiulongpo District, Chongqing, Building 23-2 Patentee before: Chongqing Solar Energy Technology Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180227 Termination date: 20190727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |