CN202696189U - Voltage balancing device - Google Patents
Voltage balancing device Download PDFInfo
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- CN202696189U CN202696189U CN 201220231712 CN201220231712U CN202696189U CN 202696189 U CN202696189 U CN 202696189U CN 201220231712 CN201220231712 CN 201220231712 CN 201220231712 U CN201220231712 U CN 201220231712U CN 202696189 U CN202696189 U CN 202696189U
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Abstract
The utility model discloses a voltage balancing device, which comprises balancing modules connected with a battery group and single batteries in the battery group, wherein each balancing module comprises a voltage acquisition circuit for acquiring voltage of the single batteries and average voltage of the battery group, a comparison circuit for comparing the voltage of the single batteries and the average voltage of the battery group and a control circuit for controlling charging and discharging; the voltage acquisition circuit is connected with the comparison circuit; and the comparison circuit is connected with the control circuit. By the voltage balancing device, each single battery is charged and discharged by the corresponding balancing module, the balancing modules are connected with one another, and finally the voltage of the storage batteries meets requirements; the balancing modules are independently arranged on the battery group, so that the original wiring, charging and discharging are not influenced; the balancing modules are simply connected and easy to dismount and mount; and electricity can flow in any single storage battery, so that the batteries in the whole group can be relatively quickly balanced.
Description
Technical field
The utility model relates to technical field of electronic equipment, particularly relates to a kind of voltage balancing device.
Background technology
According to " Guangdong Power Grid company transforming plant DC power-supply system technical specification " regulation, operating battery tension standard is 2.25V, and permissible variation is ± 0.05V that namely the permissible variation degree is 0.05/2.25=2.2%.The storage battery degree of deviation is not up to standard, and some cell voltages are too high, and some cell voltages are excessively low, namely is considered as voltage unbalanced.Generally speaking, all there is the unbalanced phenomenon of voltage in the batteries of operation more than 2 years.Battery tension is unbalanced, and then the battery of overtension is in the state of overcharging for a long time, and the brownout person then owes to fill for a long time.Overcharge for a long time and cause storage battery dehydration, bulging; Owe to fill and then cause sulfuration, crystallization.The final whole group storage battery lost of life, out of service.Remove the harm to storage battery itself, cell voltage is unbalanced also may to cause storage battery bulging initiation fire, the complete abominable situation that DC voltage losing even main transformer burn of standing.Therefore, take measures to reduce the storage battery degree of deviation of administrative area, so that battery tension is replied equilibrium, to ensure the reliability of transformer station's reserve DC power supply, very necessary.
In the tradition, can better whole group storage battery, particularly move the storage battery more than 7 years.But manpower demand is large, it is long to expend time in, expense is higher.Can activate normal single battery, the discharging and recharging of the large electric current that namely carries out for storage battery.But manpower demand is large, activation is for the storage battery DeGrain that overcharges.Also can increase storage battery and all fill number of times, " all filling " refers to the voltage unbalanced phenomena that produces in the storage battery use procedure in order to compensate, makes its recovery and the charging carried out.But portfolio effect can not be lasting, only can keep 6 to 7 days effect.
The utility model content
Based on this, be necessary that replacement cost is high when unbalanced for voltage, manpower demand large, the effect problem of poor, a kind of voltage balancing device is provided.
In order to achieve the above object, the utility model is by the following technical solutions:
A kind of voltage balancing device, comprise with battery pack and be connected the balance module that battery cell is connected with battery pack, described balance module comprises the voltage collection circuit that gathers battery cell voltage and battery pack average voltage, the battery cell voltage of comparative voltage Acquisition Circuit collection and the comparison circuit of battery voltage, the control circuit that control discharges and recharges, described voltage collection circuit is connected with comparison circuit, and described comparison circuit is connected with control circuit.
According to above-mentioned the utility model scheme, by balance module battery cell is carried out charging and discharging, reach balance, independently be installed on the battery pack, do not affect the original wiring of battery and discharge and recharge use; Connect simply, dismounting easily; Flow of electrical power is being carried out between the single battery arbitrarily, realizes that relatively fast full group is balanced.
Further, described each balance module connects a battery cell.
According to above-mentioned the utility model scheme, the positive and negative two ends of each battery cell connect a balance module, form the balanced loop of distributing, flow of electrical power is being carried out between the single battery arbitrarily, each battery cell is carried out charging and discharging, realize that relatively fast full group is balanced, and connection is simple, dismounting easily.
Further, described voltage collection circuit comprises DC converter.
According to above-mentioned the utility model scheme, gather the voltage of battery cell and battery pack by voltage acquisition unit, flow of electrical power is being carried out between the single battery arbitrarily, the full group of relatively fast realization is balanced, and connects simply, and dismounting is easily.
Further, described comparison circuit comprises the first comparator, the second comparator, resistance R 1, resistance R 2, resistance R 3, capacitor C 1, capacitor C 2, first input end contact resistance R2, resistance R 1 and the capacitor C 1 of described the first comparator, resistance R 1 other end and capacitor C 1 other end voltage collection circuit that is connected in parallel, described the first comparator the second input connects described the second comparator first input end, described the second comparator second input contact resistance R2 other end, resistance R 3 and capacitor C 2, resistance R 3 other ends are connected the other end and are connected voltage collection circuit with capacitor C.
According to above-mentioned the utility model scheme, compare monomer voltage and battery pack average voltage size by comparing unit, flow of electrical power is being carried out between the single battery arbitrarily, the full group equilibrium of relatively fast realization, and connect simply, dismounting is easily.
Further, described control unit comprises NAND gate, with door, resistance R 4, resistance R 5, the first voltage stabilizing didoe, the second voltage stabilizing didoe, the first field effect transistor, the second field effect transistor, inductance, described NAND gate first input end is connected with described the first comparator output terminal, described NAND gate the second input is connected with pulse width modulation, described NAND gate output is connected with resistance R 4, resistance R 4 and the first voltage stabilizing didoe be connected field effect transistor and be connected, the first voltage stabilizing didoe other end be connected field effect transistor the second end and be connected with comparison circuit, describedly be connected with described the second comparator output terminal with the family status one input, describedly be connected with pulse width modulation with the family status two inputs, describedly be connected with the second field effect transistor with gate output terminal, the second field effect transistor the second end is connected with the first field effect transistor the 3rd end, the second field effect transistor the 3rd end is connected with comparison circuit, resistance R 5 one ends connect power supply, the other end connects the second voltage stabilizing didoe, the second voltage stabilizing didoe other end connects comparison circuit, inductance one end connects voltage collection circuit, and the other end connects the first field effect transistor the 3rd end.
According to above-mentioned the utility model scheme, whether monomer voltage is carried out charge or discharge by control module control, flow of electrical power is being carried out between the single battery arbitrarily, the full group of relatively fast realization is balanced, and connects simply, and dismounting is easily.
Description of drawings
Fig. 1 is the structural representation of voltage balancing device of the present utility model;
Fig. 2 is the balance module structural representation;
Fig. 3 is the balanced loop structure schematic diagram of distributing.
Embodiment
Below in conjunction with concrete better embodiment the utility model voltage balancing device is described in detail.
A kind of voltage balancing device, such as Fig. 1, structural representation for voltage balancing device of the present utility model, comprise with battery pack and be connected the balance module 100 that battery cell is connected with battery pack, balance module comprises the voltage collection circuit 101 that gathers battery cell voltage and battery pack average voltage, the battery cell voltage of comparative voltage Acquisition Circuit collection and the comparison circuit 102 of battery voltage, the control circuit 103 that control discharges and recharges, voltage collection circuit is connected with comparison circuit, and comparison circuit is connected with control circuit.Balance module can be the DC/DC converter that is applicable to DC135V.
The utility model voltage balancing device is applicable to various power-supply systems, and the below is take common DC110V transforming plant DC power-supply system as the example explanation.In the DC110V direct current system, become batteries by 54 storage battery series connection, via charger control, the terminal voltage of batteries is controlled at DC 121.5V by charger, and the average voltage Ua of single battery then is DC 2.25V.And the normal range (NR) of single battery voltage U i is DC2.2-2.3V.
Balance module carries out analog quantity relatively with the monomer voltage of the average voltage of storage battery and place storage battery, if monomer voltage greater than average voltage, namely this monomer be the monomer of overtension in entirely organizing.Through comparison, control unit, electric energy is flowed to the average voltage direction by single battery.Be that monomer charges to the average voltage direction, also namely to the terminal voltage direction charging of batteries, from physical unit, namely monomer charges to equilibrium line.When single battery voltage drop during to normal range (NR), charging process stops; Otherwise equilibrium line is to the monomer charging of brownout.Specific as follows:
As shown in Figure 2, be the balance module structural representation.Voltage collection circuit comprises DC converter, and this DC converter can be the DC converter that is applicable to DC135V, or is applicable to the DC converter of other voltages.Single battery voltage U i directly inputs, and storage battery average voltage Ua is by converter power taking pond cell mean, if the DC110V direct current system, then no-load voltage ratio is k:1=54:1, i.e. Ua=accumulator voltage Ud/54.
As shown in Figure 2, be the balance module structural representation.Comparison circuit wherein, comprise the first comparator, the second comparator, resistance R 1, resistance R 2, resistance R 3, capacitor C 1, capacitor C 2, first input end contact resistance R2, resistance R 1 and the capacitor C 1 of the first comparator, resistance R 1 other end and capacitor C 1 other end voltage collection circuit that is connected in parallel, the first comparator the second input connects the second comparator first input end, the second comparator second input contact resistance R2 other end, resistance R 3 and capacitor C 2, resistance R 3 other ends are connected the other end and are connected voltage collection circuit with capacitor C.
When single battery voltage U i in the 2.2-2.3V scope, during namely close to average voltage Ua, the first comparator output high level, the second comparator output low level;
As Ui during greater than 2.3V, the first comparator output high level, the second comparator output high level;
As Ui during less than 2.2V, the first comparator output low level, the second comparator output low level.
As shown in Figure 2, be the balance module structural representation.Wherein, control circuit comprise NAND gate, with door, resistance R 4, resistance R 5, the first voltage stabilizing didoe, the second voltage stabilizing didoe, the first field effect transistor, the second field effect transistor, inductance, the NAND gate first input end is connected with the first comparator output terminal, NAND gate the second input and pulse width modulation (PWM, Pulse Width Modulation) connects, PWM is a kind of analog control mode, its variation according to respective loads comes the biasing of modulation crystal tube grid or base stage, realizes the change of switching power supply output transistor or transistor turns time.PWM has the function that starts field effect transistor, inputs corresponding high level or low level according to high level or the low level of comparator.The NAND gate output is connected with resistance R 4, resistance R 4 and the first voltage stabilizing didoe be connected field effect transistor and be connected, the first voltage stabilizing didoe other end be connected field effect transistor the second end and be connected with comparison circuit, be connected with the second comparator output terminal with the family status one input, be connected with pulse width modulation with the family status two inputs, be connected with the second field effect transistor with gate output terminal, the second field effect transistor the second end is connected with the first field effect transistor the 3rd end, the second field effect transistor the 3rd end is connected with comparison circuit, resistance R 5 one ends connect power supply, the other end connects the second voltage stabilizing didoe, the second voltage stabilizing didoe other end connects comparison circuit, inductance one end connects voltage collection circuit, and the other end connects the first field effect transistor the 3rd end.
When single battery voltage U i in the 2.2-2.3V scope, namely close to average voltage Ua, the first comparator output high level, the second comparator output low level, field effect transistor Q1, all not conductings of Q2;
When Ui greater than 2.3V, be that monomer voltage is higher than average voltage, the first comparator output high level, the second comparator output high level, not conducting of field effect transistor Q1, field effect transistor Q2 conducting, Ui charges to inductance L, and when Ui drops to when being lower than 2.3V, Q2 disconnects, the charging process of Ui stops, and voltage just reaches normal range (NR).Subsequently because the afterflow effect of inductance L, L will be by the first voltage stabilizing didoe flow of electrical power to Ua.From physical unit, this process is that the overtension single battery charges to equilibrium line.
When Ui less than 2.2V, the first comparator output low level, the second comparator output low level.Not conducting of field effect transistor Q2, field effect Q1 conducting, Ua charges to inductance L, and after Q1 disconnected, because the afterflow effect of inductance L, L will charge to Ui.After the charging, if Ui does not reach 2.2V yet, then continue the first comparator output low level, the second comparator output low level.Not conducting of field effect transistor Q2, field effect Q1 conducting.Be higher than 2.2V until Ui rises to, the charging process of Ua stops, and Ui reaches normal range (NR).From physical unit, this process is that equilibrium line charges to the brownout single battery.
As shown in Figure 3, be the balanced loop structure schematic diagram of distributing.The positive and negative two ends of each battery cell connect a balance module, then form the balanced loop structure schematic diagram of distributing.In the DC110V DC power system, the balanced loop of distributing is formed by connecting by 54 balance modules.The balance module secondary side is installed in respectively the positive and negative two ends of single battery, and primary side is installed in the batteries terminal voltage.Flow of electrical power between each balance module and the equilibrium line finally realizes any one overtension single battery and crosses the equilibrium of hanging down between the monomer that each single battery voltage will be stabilized in normal range (NR) DC 2.2-2.3V.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (5)
1. voltage balancing device, it is characterized in that, comprise with battery pack and be connected the balance module that battery cell is connected with battery pack, described balance module comprises the voltage collection circuit that gathers battery cell voltage and battery pack average voltage, the battery cell voltage of comparative voltage Acquisition Circuit collection and the comparison circuit of battery voltage, the control circuit that control discharges and recharges, described voltage collection circuit is connected with comparison circuit, and described comparison circuit is connected with control circuit.
2. voltage balancing device according to claim 1 is characterized in that, described each balance module connects a battery cell.
3. voltage balancing device according to claim 1 and 2 is characterized in that, described voltage collection circuit comprises DC converter.
4. voltage balancing device according to claim 1 and 2, it is characterized in that, described comparison circuit comprises the first comparator, the second comparator, resistance R 1, resistance R 2, resistance R 3, capacitor C 1, capacitor C 2, the first input end contact resistance R2 of described the first comparator, resistance R 1 and capacitor C 1, resistance R 1 other end and capacitor C 1 other end voltage collection circuit that is connected in parallel, described the first comparator the second input connects described the second comparator first input end, described the second comparator second input contact resistance R2 other end, resistance R 3 and capacitor C 2, resistance R 3 other ends are connected the other end and are connected voltage collection circuit with capacitor C.
5. voltage balancing device according to claim 4, it is characterized in that, described control circuit comprises NAND gate, with door, resistance R 4, resistance R 5, the first voltage stabilizing didoe, the second voltage stabilizing didoe, the first field effect transistor, the second field effect transistor, inductance, described NAND gate first input end is connected with described the first comparator output terminal, described NAND gate the second input is connected with pulse width modulation, described NAND gate output is connected with resistance R 4, resistance R 4 and the first voltage stabilizing didoe be connected field effect transistor and be connected, the first voltage stabilizing didoe other end be connected field effect transistor the second end and be connected with comparison circuit, describedly be connected with described the second comparator output terminal with the family status one input, describedly be connected with pulse width modulation with the family status two inputs, describedly be connected with the second field effect transistor with gate output terminal, the second field effect transistor the second end is connected with the first field effect transistor the 3rd end, the second field effect transistor the 3rd end is connected with comparison circuit, resistance R 5 one ends connect power supply, the other end connects the second voltage stabilizing didoe, the second voltage stabilizing didoe other end connects comparison circuit, inductance one end connects voltage collection circuit, and the other end connects the first field effect transistor the 3rd end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231712 CN202696189U (en) | 2012-05-22 | 2012-05-22 | Voltage balancing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220231712 CN202696189U (en) | 2012-05-22 | 2012-05-22 | Voltage balancing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762631A (en) * | 2014-01-03 | 2014-04-30 | 洛阳理工学院 | Active voltage balancing device |
| CN104467105A (en) * | 2014-12-23 | 2015-03-25 | 中国西电电气股份有限公司 | Energy transfer type super capacitor voltage equalization circuit |
| CN106602656A (en) * | 2016-12-28 | 2017-04-26 | 中国电子科技集团公司第十八研究所 | Average voltage-based space lithium battery equalization module |
| CN111143973A (en) * | 2019-12-05 | 2020-05-12 | 云南电网有限责任公司玉溪供电局 | Valve-regulated lead-acid storage battery degradation trend prediction method based on Gauss process regression |
| CN111245069A (en) * | 2020-03-25 | 2020-06-05 | 唐山尚新融大电子产品有限公司 | Bidirectional equalization control device and control method thereof |
-
2012
- 2012-05-22 CN CN 201220231712 patent/CN202696189U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762631A (en) * | 2014-01-03 | 2014-04-30 | 洛阳理工学院 | Active voltage balancing device |
| CN103762631B (en) * | 2014-01-03 | 2016-03-30 | 洛阳理工学院 | A kind of active voltage balancing device |
| CN104467105A (en) * | 2014-12-23 | 2015-03-25 | 中国西电电气股份有限公司 | Energy transfer type super capacitor voltage equalization circuit |
| CN104467105B (en) * | 2014-12-23 | 2016-11-30 | 中国西电电气股份有限公司 | A kind of energy transfer ultracapacitor voltage equalizing circuit |
| CN106602656A (en) * | 2016-12-28 | 2017-04-26 | 中国电子科技集团公司第十八研究所 | Average voltage-based space lithium battery equalization module |
| CN111143973A (en) * | 2019-12-05 | 2020-05-12 | 云南电网有限责任公司玉溪供电局 | Valve-regulated lead-acid storage battery degradation trend prediction method based on Gauss process regression |
| CN111245069A (en) * | 2020-03-25 | 2020-06-05 | 唐山尚新融大电子产品有限公司 | Bidirectional equalization control device and control method thereof |
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Granted publication date: 20130123 |