CN112039167B - Multi-mode serial-parallel conversion circuit - Google Patents
Multi-mode serial-parallel conversion circuit Download PDFInfo
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- CN112039167B CN112039167B CN202010989030.5A CN202010989030A CN112039167B CN 112039167 B CN112039167 B CN 112039167B CN 202010989030 A CN202010989030 A CN 202010989030A CN 112039167 B CN112039167 B CN 112039167B
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- mos tube
- conversion circuit
- parallel conversion
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- electrode
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 31
- 230000002457 bidirectional effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a multimode serial-parallel conversion circuit which comprises two total buses, a plurality of storage batteries, a plurality of multimode serial-parallel conversion circuits formed by connecting Mos pipes and a plurality of groups of bidirectional switches connected with the buses one by one. The storage batteries are connected through a multi-mode serial-parallel circuit conversion structure, and the multi-mode connection between the storage batteries is realized by controlling the multi-mode serial-parallel circuit conversion circuit and the on-off of a bidirectional conduction switch connected with the storage batteries and the on-off of switches of upper and lower buses, so that when the storage batteries are charged, different charging strategies can be adopted to achieve balanced charging between the storage batteries.
Description
Technical Field
The invention relates to the technical field of storage batteries, in particular to a multi-mode serial-parallel conversion circuit.
Background
In recent years, the electric automobile industry in China develops rapidly, and a large number of retired batteries can be generated along with the use of vehicles. According to the prediction of the China automobile technical research center, the accumulated scrapping amount of the energy storage battery of the passenger car in China reaches 12-17 ten thousand tons by the year 2020. The scrapping of energy storage batteries for vehicles is gradually advanced into peak periods, and the disposal of the batteries is becoming a problem to be faced and solved in the automobile industry. If the old batteries can be fully utilized in a echelon manner, the peak-valley electricity consumption of the power grid can be regulated for the power plant as a charging energy storage medium, and the power plant can also be used as a standby energy storage device for enterprises and enterprises, so that the power plant has wide economic prospect and rich practical value.
However, the direct reuse of the retired electric automobile energy storage battery which is not detected and screened has the following two problems: on one hand, the characteristics of the energy storage battery of the electric automobile are different along with the capacity attenuation degree, and each performance index of the retired battery is larger in difference, so that the discharge capacity of the battery pack is influenced; on the other hand, the problematic battery is not inspected and reused, which increases the safety risk of the other entire battery system, and reduces the safety and reliability of the battery pack. How to detect a defective battery and to perform a cascade of use and equalizing charge on a reusable battery becomes a critical issue.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problems, the invention provides a multi-mode serial-parallel conversion circuit, which does not use a resistor-inductor component under the condition of not changing the space position of single batteries, realizes the recombination of all the single batteries only by a switch, and can realize multiple connection modes among the single batteries by switching on and switching off of the switch so as to meet the optimal utilization of different charging strategies for charging a battery pack and a power supply.
In order to achieve the above purpose, the present invention provides the following technical solutions: the invention provides a multimode serial-parallel conversion circuit which comprises an anode bus, a grounding bus and a plurality of storage batteries, wherein the anode and the cathode of each storage battery are respectively connected with the anode bus and the grounding bus through a two-way switch, and a multimode serial-parallel conversion circuit body is connected between two adjacent storage batteries;
the multi-mode serial-parallel conversion circuit body comprises a first module and a second module, wherein the first module comprises a Mos tube Sb11, the drain electrode of the Mos tube Sb11 is connected with the positive electrode of a storage battery B1, the source electrode of the Mos tube Sb11 is connected with the source electrode of the Mos tube Sc11, the source electrode of the Mos tube Sc11 is connected with one of two-way switches, the drain electrode of the Mos tube Sc11 is connected with the source electrode of a Mos tube Sd11, the drain electrode of the Mos tube Sd11 is connected with the positive electrode of a storage battery B2, the public end of the connection between the Mos tube Sd11 and the Mos tube Sc11 is connected with the source electrode of the Mos tube Se11, the drain electrode of the Mos tube Se11 is connected with the source electrode of the Mos tube Sf11, and the drain electrode of the Mos tube Sf11 is connected with the positive electrode of the storage battery B1;
the negative electrode of the storage battery B1 is connected with a second module, the second module is symmetrically arranged with the first module, the drain electrode of a Mos tube Sd21 of the second module is connected with the drain electrode of a Mos tube Sd11 through a Mos tube Sh1, the common end of a Mos tube Se21 of the second module and a Mos tube Sf21 is connected with the drain electrode of a Mos tube Sg1, and the source electrode of the Mos tube Sg1 is connected with the common end of a Mos tube Se12 and a Mos tube Sf12 of the right multi-mode serial-parallel conversion circuit body;
the circuit structures of the multiple multimode serial-parallel conversion circuit bodies are the same.
Working principle:
1. the full series connection of a plurality of storage batteries is realized by controlling the on-off of the Mos tube. When the circuit mode works in the full series mode, more than one full series connection passage is needed, and when a certain Mos tube breaks down, the normal work of the full series mode can be realized by controlling the on-off of the Mos tube, and the formed storage battery pack has the characteristic of large voltage load output.
2. The full parallel connection of a plurality of storage batteries can be realized by controlling the on-off of the Mos tube. When the circuit mode works in the full parallel mode, more than one full parallel connection passage is needed, and when a certain Mos tube breaks down, the normal work of the full parallel mode can be realized by controlling the on-off of the Mos tube, and the formed storage battery pack has the characteristic of high capacity and high load carrying capacity.
3. The on-off of the Mos tube is controlled, so that a plurality of storage batteries are connected in parallel with the plurality of storage batteries after being connected in series, for example, a battery pack formed by connecting three storage batteries in series is connected with other two storage batteries in parallel, or the three storage batteries are firstly connected in parallel, then the formed storage battery pack is connected with two independent storage batteries in parallel to form a new storage battery, and therefore the formed storage battery can exert the advantages of a charging strategy when being recharged, and can adapt to the charging strategy, so that energy utilization is more optimized.
4. The battery pack formed by connecting a plurality of storage batteries in series is realized by controlling the on-off of the Mos tube, and then the battery pack is connected in parallel with the battery pack formed by connecting other storage batteries in series, so that a battery pack in a serial-parallel-serial mode is formed, and the battery charging strategy of balanced charging can be adapted.
Further, since the Mos tube is a component that can be turned on in both directions, the two-way switch adopts the Mos tube.
The invention has the beneficial effects that: according to the multi-mode serial-parallel conversion circuit provided by the invention, the storage batteries are connected through the multi-mode serial-parallel circuit conversion structure, and the multi-mode connection between the storage batteries is realized by controlling the multi-mode serial-parallel conversion circuit and the on-off of the bidirectional conduction switch connected with the storage batteries and the switch of the upper bus and the lower bus, so that different charging strategies can be adopted to achieve balanced charging between the storage batteries when the storage batteries are charged.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a block diagram of the structure of the present invention;
fig. 2 is a circuit diagram of the present invention.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
As shown in fig. 1 and fig. 2, the multimode serial-parallel conversion circuit provided by the invention comprises an anode bus, a grounding bus and a plurality of storage batteries, wherein the anode and the cathode of each storage battery are respectively connected with the anode bus and the grounding bus through a bidirectional switch, and a multimode serial-parallel conversion circuit body is connected between two adjacent storage batteries;
the multi-mode serial-parallel conversion circuit body comprises a first module and a second module, wherein the first module comprises a Mos tube Sb11, the drain electrode of the Mos tube Sb11 is connected with the positive electrode of a storage battery B1, the source electrode of the Mos tube Sb11 is connected with the source electrode of the Mos tube Sc11, the source electrode of the Mos tube Sc11 is connected with one of two-way switches, the drain electrode of the Mos tube Sc11 is connected with the source electrode of a Mos tube Sd11, the drain electrode of the Mos tube Sd11 is connected with the positive electrode of a storage battery B2, the public end of the connection between the Mos tube Sd11 and the Mos tube Sc11 is connected with the source electrode of the Mos tube Se11, the drain electrode of the Mos tube Se11 is connected with the source electrode of the Mos tube Sf11, and the drain electrode of the Mos tube Sf11 is connected with the positive electrode of the storage battery B1;
the negative electrode of the storage battery B1 is connected with a second module, the second module is symmetrically arranged with the first module, the drain electrode of a Mos tube Sd21 of the second module is connected with the drain electrode of a Mos tube Sd11 through a Mos tube Sh1, the common end of a Mos tube Se21 of the second module and a Mos tube Sf21 is connected with the drain electrode of a Mos tube Sg1, and the source electrode of the Mos tube Sg1 is connected with the common end of a Mos tube Se12 and a Mos tube Sf12 of the right multi-mode serial-parallel conversion circuit body;
the circuit structures of the multiple multimode serial-parallel conversion circuit bodies are the same.
As shown in fig. 1 and 2, the Mos tube is a component that can be turned on in two directions, so the two-way switch adopts the Mos tube.
As shown in fig. 2, four modes of operation are described in detail for 4 batteries and extend to multiple battery connections:
1. all the single cells are connected in series:
the positive bus is led out and is connected with the positive electrode of the single battery B1 through the Mos tube Sa11, the negative electrode of the single battery B1 is led out and is connected with the positive electrode of the single battery B2 through the Mos tube Sb21, the Mos tube Sc21, the Mos tube Sd21, the Mos tube Sh1 and the Mos tube Sb12, and thus the connection of the first single battery and the second single battery is completed. The connection from the second group of cells to the nth group of cells is similar, the cathodes of the nth group of cells are finally connected with the grounding bus through the Mos tube Sa2n, the switching tubes in the process are all kept in an open state, and the switching tubes on the paths which do not pass through are all in a closed state. If any one of the Mos tubes Shn fails, taking connection of the first group of single batteries and the second group of single batteries as an example, the positive electrode bus is led out to pass through the Mos tube Sa11, and is connected with the positive electrode of the single battery B1 through the Mos tube Sb11, the negative electrode of the single battery B1 is led out to pass through the Mos tube Sf21, the Mos tube Sg1 and the Mos tube Sf12 and then is connected with the positive electrode of the second group of single battery B2, and the connection modes from the second group of batteries to the nth group of batteries are similar, and the negative electrode of the nth group of batteries is finally connected with the grounding bus through the Mos tube Sa2n, so that the switching device with functions and fault bypassing can be realized.
2. All parallel connection among single batteries:
in the structure of the first group of batteries B1, the positive electrode of the battery B1 is led out from the positive electrode bus and is connected with the positive electrode of the battery B1 through the Mos tube Sa11 and the Mos tube Sb11, the negative electrode of the battery B1 is led out and is connected with the grounding bus through the Mos tube Sb21 and the Mos tube Sc21, the connection of the first group of batteries is finished, the second group of batteries to the nth group of batteries are connected in a similar way, the switching tubes mentioned in the process are all kept in an open state, and the switching tubes on the paths which do not pass through are all in a closed state. If the switching device with the bus-bar end directly connected is faulty, taking the first group of batteries as an example, the first group of batteries is connected to the positive electrode of the B1 from the Mos tube Sb11, the Mos tube Sc21, the Mos tube Sd21 and the Mos tube Sb22 are connected to the negative electrode of the B2 from the negative electrode of the B1, the positive electrode of the B2 passes through the Mos tube Sb12, the Mos tube Sd11 and the Mos tube Sc11 and finally is connected with the Mos tube Sb11, so far, the parallel connection of the single batteries B1 and the B2 is completed in a closed loop, and the connection of the similar batteries B3, B4, … … and Bn is similar, the function of the mode can be completed without passing through the faulty switching tube, the switching tubes in the above processes are all kept in an open state, and the switching tubes on the paths without passing through are all in a closed state.
3. The series-connected battery pack is connected with other single batteries in parallel or the series-connected battery pack is connected with other single batteries in series after being connected in parallel:
because the battery pack is connected in parallel with other single batteries after being connected in series and is identical to the series structure of the other single batteries after being connected in parallel, the situation that the single batteries B1 and B3 are connected in parallel and then connected in series with the battery B2 and then connected in series with the battery B4 is taken as an example, and the specific implementation process is as follows:
the positive electrode is led out from the positive bus through a Mos tube Sa11, a Mos tube Sb11 and a B1 positive electrode, the negative electrode is led out from the B1 negative electrode through a Mos tube Sb21 and a Mos tube Sa21 to the grounding bus, a similar connection mode is adopted on the structure of a single battery B4, then a circuit is led out from the Mos tube Sc21, passes through a Mos tube Se21, a Mos tube Sg1 and a Mos tube Sf12 and then passes through the B2 positive electrode, and the circuit is led out from the negative electrode of the B2 positive electrode, passes through a Mos tube Sf22, a Mos tube Sg2, a Mos tube Se13, a Mos tube Sd13, a Mos tube Sc14, a Mos tube Se14 and a Mos tube Sf14 and passes through the positive electrode of the B4 negative electrode, so on, and the connection is completed. The switching tubes mentioned in the above process will all remain open and the switching tubes on the paths not traversed will all be closed. When n single batteries need to be connected, the method is still applicable.
4. The battery pack formed by connecting the single batteries in series is connected in parallel with the battery pack formed by connecting the other single batteries in series:
the situation that the battery pack formed by connecting the single batteries in series is connected in parallel with the battery pack formed by connecting the other single battery in series is exemplified here by the case that the battery pack formed by connecting the single batteries B1 and B3 in series is connected in parallel with the battery pack formed by connecting the single batteries B2 and B4 in series.
The positive bus is led out from the positive bus to pass through the Mos tube Sa11 and the Mos tube Sb11 to pass through the B1 positive electrode, the B1 negative electrode is led out from the negative bus to pass through the Mos tube Sf21, the Mos tube Sg1, the Mos tube Se12, the Mos tube Sd21 and the Mos tube Sb13 to pass through the B3 positive electrode, and the negative electrode is led out from the B3 negative electrode to pass through the Mos tube Sb23 and the Mos tube Sa23 to reach the grounding bus.
The positive electrode bus is led out from the positive electrode bus to the B2 positive electrode through the Mos tube Sa12 and the Mos tube Sb12, the negative electrode bus is led out from the B2 negative electrode to the B4 positive electrode through the Mos tube Sf22, the Mos tube Sg2, the Mos tube Se13, the Mos tube Sd13 and the Mos tube Sb14, and the negative electrode bus is led out from the B4 negative electrode to the grounding bus through the Mos tube Sb24 and the Mos tube Sa 24.
The switching tubes mentioned in the above process will all remain open and the switching tubes on the paths not traversed will all be closed. So far, the two battery packs, the battery pack consisting of B1 and B3 and the battery pack consisting of B2 and B4 are connected in parallel, and the method is still applicable when n single batteries need to be connected.
According to the multi-mode serial-parallel conversion circuit provided by the invention, the storage batteries are connected through the multi-mode serial-parallel circuit conversion structure, and the multi-mode connection between the storage batteries is realized by controlling the multi-mode serial-parallel conversion circuit and the on-off of the bidirectional conduction switch connected with the storage batteries and the switch of the upper bus and the lower bus, so that different charging strategies can be adopted to achieve balanced charging between the storage batteries when the storage batteries are charged.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (2)
1. A multimode serial-parallel conversion circuit, characterized in that: the multi-mode series-parallel conversion circuit comprises an anode bus, a grounding bus and a plurality of storage batteries, wherein the anode and the cathode of each storage battery are respectively connected with the anode bus and the grounding bus through a two-way switch, and a multi-mode series-parallel conversion circuit body is connected between two adjacent storage batteries;
the multi-mode serial-parallel conversion circuit body comprises a first module and a second module, wherein the first module comprises a Mos tube Sb11, the drain electrode of the Mos tube Sb11 is connected with the positive electrode of a storage battery B1, the source electrode of the Mos tube Sb11 is connected with the source electrode of the Mos tube Sc11, the source electrode of the Mos tube Sc11 is connected with one of the two-way switches, the drain electrode of the Mos tube Sc11 is connected with the source electrode of a Mos tube Sd11, the drain electrode of the Mos tube Sd11 is connected with the positive electrode of a storage battery B2, the public end of the connection between the Mos tube Sd11 and the Mos tube Sc11 is connected with the source electrode of the Mos tube Se11, the drain electrode of the Mos tube Se11 is connected with the source electrode of the Mos tube Sf11, and the drain electrode of the Mos tube Sf11 is connected with the positive electrode of the storage battery B1;
the negative electrode of the storage battery B1 is connected with the second module, the second module is symmetrically arranged with the first module, the drain electrode of a Mos tube Sd21 of the second module is connected with the drain electrode of a Mos tube Sd11 through a Mos tube Sh1, the common end of the Mos tube Se21 and the Mos tube Sf21 of the second module is connected with the drain electrode of a Mos tube Sg1, and the source electrode of the Mos tube Sg1 is connected with the common end of the Mos tube Se12 and the Mos tube Sf12 of the multimode serial-parallel conversion circuit body on the right side;
the circuit structures of the multimode serial-parallel conversion circuit bodies are the same.
2. The multi-mode serial-parallel conversion circuit according to claim 1, wherein: the two-way switch adopts a Mos tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010989030.5A CN112039167B (en) | 2020-09-18 | 2020-09-18 | Multi-mode serial-parallel conversion circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010989030.5A CN112039167B (en) | 2020-09-18 | 2020-09-18 | Multi-mode serial-parallel conversion circuit |
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| CN112039167A CN112039167A (en) | 2020-12-04 |
| CN112039167B true CN112039167B (en) | 2023-12-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016032415A (en) * | 2014-07-30 | 2016-03-07 | 日立化成株式会社 | Serial-parallel battery pack and control method of serial-parallel battery pack |
| CN106451645A (en) * | 2016-11-07 | 2017-02-22 | 昆明理工大学 | Series-parallel connection converter |
| CN108583347A (en) * | 2018-06-06 | 2018-09-28 | 昆明理工大学 | A kind of equalizing circuit and its control method of charged in parallel and selective single battery equalization discharge |
| CN109638923A (en) * | 2019-01-17 | 2019-04-16 | 哈尔滨工业大学 | Mixed mode battery equalizing circuit |
| CN210607522U (en) * | 2019-10-25 | 2020-05-22 | 华南理工大学 | Novel lithium ion battery Cell-to-Cell modularized equalization circuit based on single inductor |
-
2020
- 2020-09-18 CN CN202010989030.5A patent/CN112039167B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016032415A (en) * | 2014-07-30 | 2016-03-07 | 日立化成株式会社 | Serial-parallel battery pack and control method of serial-parallel battery pack |
| CN106451645A (en) * | 2016-11-07 | 2017-02-22 | 昆明理工大学 | Series-parallel connection converter |
| CN108583347A (en) * | 2018-06-06 | 2018-09-28 | 昆明理工大学 | A kind of equalizing circuit and its control method of charged in parallel and selective single battery equalization discharge |
| CN109638923A (en) * | 2019-01-17 | 2019-04-16 | 哈尔滨工业大学 | Mixed mode battery equalizing circuit |
| CN210607522U (en) * | 2019-10-25 | 2020-05-22 | 华南理工大学 | Novel lithium ion battery Cell-to-Cell modularized equalization circuit based on single inductor |
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| CN112039167A (en) | 2020-12-04 |
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