CN208623347U - Charging control circuit based on adjustable battery pack cascaded structure - Google Patents
Charging control circuit based on adjustable battery pack cascaded structure Download PDFInfo
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- CN208623347U CN208623347U CN201820855068.1U CN201820855068U CN208623347U CN 208623347 U CN208623347 U CN 208623347U CN 201820855068 U CN201820855068 U CN 201820855068U CN 208623347 U CN208623347 U CN 208623347U
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- China
- Prior art keywords
- battery
- output end
- battery pack
- cathode output
- single battery
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Abstract
The utility model discloses a kind of charging control circuit based on adjustable battery pack cascaded structure, the anode connection cathode output end of each battery unit, cathode connects cathode output end, the cathode output end of the cathode output end connection adjacent cell of adjacent cell constitutes concatenated battery pack, it is characterized by: connecting between the cathode output end and cathode output end of each battery unit by second switch element, first switching element is equipped between the cathode output end and battery unit anode or cathode output end and battery unit cathode.It is controlled by dynamic, each single battery (or single battery group) in battery pack can reach fully charged.
Description
Technical field
The utility model relates to field of batteries.
Background technique
New energy technology is fast-developing, especially lithium battery the fields such as standby energy storage and electric car extensive use,
Requirements at the higher level are proposed to crucial battery energy storage and battery management technique, need to be promoted validity and equilibrium to battery pack charging
Ability performs to the energy storage characteristic of battery pack most preferably.
Battery pack packet technology has high requirement to the consistency of single battery, otherwise because of the serious shadow of battery consistency problem
Ring the performance of battery pack overall performance.But it is limited by battery technology, needs to solve battery one by better battery management technique
Cause property problem reduces battery pack packet to the coherence request of single battery.
There is the problems such as low efficiency, practical application effect is undesirable in current passive balanced and active equalization technology.It is special
It is not active equalization technology, including capacitor degree of flying method, voltage transformation approach, circuit is extremely complex, hardware volume is big, application cost is high
The defects of.It needs better battery management technique and promotes application level.
The performance of entire battery pack is limited by single battery failure or the influence of quality problems.Need better cell tube
The reliability and safety of reason technology raising battery applications.
Utility model content
Technical problem to be solved in the utility model is to realize a kind of adjustable battery pack cascaded structure, has battery guarantor
The charging control circuit of shield and active equalization function.
To achieve the goals above, the technical solution adopted in the utility model are as follows: based on adjustable battery pack cascaded structure
Charging control circuit, battery pack is made of battery cells in series, the anode connection cathode output end of each battery unit,
Cathode connects cathode output end, and the cathode output end of the cathode output end connection adjacent cell of adjacent cell constitutes string
The battery pack of connection is connected between the cathode output end and cathode output end of each battery unit by second switch element,
First switching element is equipped between the cathode output end and battery unit anode or cathode output end and battery unit cathode.
Wherein the anode of first battery unit of battery pack and the cathode of the last one battery unit are separately connected direct current
Charging interface, direct-current charging interface connect DC power supply as battery pack charging.
When the first switching element of battery unit disconnects, second switch element is closed, the battery unit is from battery pack
Separation, when the first switching element of battery unit closure, second switch element disconnect, which is linked into battery pack
In.
Control method based on the charging control circuit:
When battery pack charging, the second switch element of each battery unit is disconnected, the first of each battery unit is closed
Switch element；
Some battery cell voltage is higher if it exists or abnormal state, then disconnects the first switching element of the battery unit,
And it is closed the second switch element of the battery unit, the parameter of each battery unit can be obtained in real time by battery management unit
Signal；
Battery cell voltage is higher can to acquire relevant information by electric quantity acquisition unit, and abnormal state can pass through temperature
Sensor obtains relevant information.
Utility model has the advantages that
1, tandem compound can be added in single battery (or single battery group), tandem compound can also be bypassed out completely.It can be with
Charging current is controlled with or without any single battery (or single battery group), that is, can reach euqalizing current and be equal to charging electricity
The high efficiency of stream is balanced.
2, each single battery in battery pack (or single battery group) can reach fully charged, make the storage of battery pack
Energy characteristic performs to most preferably, and independent of the coherence request to single battery.
3, each single battery (or single battery group) is used only two groups of field-effect tube, relay or other switching devices and makees
For turn-on and turn-off control, it can be realized and seal in or Bypass Control, simple circuit, control is simple, low in cost.
4, failure or quality problems especially are occurred to single battery (or single battery group), can bypassed completely in tandem compound
Outside, the reliability and safety of battery pack application are provided.
Detailed description of the invention
The content of width attached drawing every in the utility model specification expression is briefly described below:
Fig. 1 is battery pack charging status schematic diagram；
Disconnected schematic diagram out when Fig. 2 is some battery unit exception in charging process；
Disconnected schematic diagram out when Fig. 3 is multiple battery unit exceptions in charging process.
Specific embodiment
The utility model discloses a kind of adjustable battery pack cascaded structure, have battery protection and active equalization function
Charging control circuit.The circuit design can by control electric current guiding path to each single battery (or single battery group) into
Row charge control is, it can be achieved that active equalization ability identical with charging current.It is controlled by dynamic, each of battery pack
Single battery (or single battery group) can reach fully charged.
Each single battery (or single battery group) in battery pack passes through field-effect tube, relay or other switching devices
On-off control is carried out, realizes and single battery (or single battery group) is sealed in into bus, or by single battery (or single battery group)
Bypass out tandem compound.
The cathode of single battery (or single battery group) is directly connected with series bus, positive then pass through Sx_1 switch (the
One switch element) connection series bus.Sx_1 switch conduction, Sx_2 (second switch element) switch disconnect, then this grade of monomer electricity
Pond (or single battery group) seals in bus, participates in charging.Sx_1 switch disconnects, Sx_2 switch conduction, then this grade of single battery (or
Single battery group) tandem compound is bypassed out, without charging.
Specifically:
Single battery (or single battery group) cathode is directly connected with series bus, and directly series connection does not form battery to anode
Group, but on-off control is carried out by field-effect tube, relay or other switching devices, by single battery (or single battery group)
Seal in bus.
Single battery (or single battery group) can carry out on-off control by field-effect tube, relay or other switching devices
System, by this grade of bus conducting connection, single battery (or single battery group) then bypasses out tandem compound.
Voltage and status information of the charging process according to each single battery (or single battery group), normal single battery
(or single battery group) can be sealed in bus by field-effect tube, relay or other switching devices and carry out charging connection.Abnormal
Single battery (or single battery group) can be connected this grade of bus conducting by field-effect tube, relay or other switching devices,
This grade of cell bypass goes out tandem compound, obstructed overcharge current.
Charging process is according to the voltage and status information of each single battery (or single battery group), and real-time control adjustment is respectively
A single battery (or single battery group) seals in busbar charging or bypasses out tandem compound, realizes charge protection and active equalization.
It is controlled by dynamic, each single battery (or single battery group) in battery pack can reach fully charged.
Charging process is equal to charging current to the euqalizing current of each single battery (or single battery group).
By the utility model technology, requirement of the battery pack packet to single battery consistency can be substantially reduced.
By the utility model technology, charger can be realized to each single battery (or single battery group) in battery pack
Shield and active equalization.Each single battery (or single battery group) can reach fully charged.
By the utility model technology, the single battery (or single battery group) that problem can will be present thoroughly excludes connecting
Combination is outer, and the use of battery pack will not be influenced because of the damage of individual monomers battery (or single battery group), greatly improves system
Safety and reliability.
Control logic is charged normal, as shown in Figure 1:
Sx_1 switch conduction, Sx_2 switch disconnect.All single batteries (or single battery group) access series bus, charging
Electric current is by all battery units in battery pack.
1 group of single battery (or single battery group) voltage is higher or the charging control logic of abnormal state, as shown in Figure 2:
Sx_1 switch conduction, Sx_2 switch disconnect.But there is abnormal B2 battery unit, control anode and bus connect
The S2_1 switch connect disconnects, the S2_2 switch conduction that control bus is directly connected to.Charging current is without B2 battery unit, B2 electricity
Pool unit is separated without charging with battery pack.
2 groups or multiple groups single battery (or single battery group) voltage is higher or the charging control logic of abnormal state, such as Fig. 3
It is shown:
Sx_1 switch conduction, Sx_2 switch disconnect.But there is abnormal B1, B2 battery unit, control anode and mother
S1_1, S2_1 of line connection, which are switched, to be disconnected, S1_2, S2_2 switch conduction that control bus is directly connected to.Charging current without
B1, B2 battery unit, B1, B2 battery unit are separated without charging with battery pack.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, as long as the various unsubstantialities carried out using the method concept and technical solution of the utility model change
Into, or it is not improved the conception and technical scheme of the utility model are directly applied into other occasions, in the utility model
Protection scope within.
Claims (2)
1. battery pack is made of battery cells in series, Mei Gesuo based on the charging control circuit of adjustable battery pack cascaded structure
The anode connection cathode output end of battery unit is stated, cathode connects cathode output end, and the cathode output end of adjacent cell connects
The cathode output end for connecing adjacent cell constitutes concatenated battery pack, it is characterised in that: the anode of each battery unit
It is connected between output end and cathode output end by second switch element, the cathode output end is positive or negative with battery unit
First switching element is equipped between pole output end and battery unit cathode.
2. the charging control circuit according to claim 1 based on adjustable battery pack cascaded structure, it is characterised in that: when
When the first switching element of battery unit disconnects, second switch element is closed, which separates from battery pack, works as battery
When the first switching element closure of unit, second switch element disconnect, which is linked into battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820855068.1U CN208623347U (en) | 2018-06-04 | 2018-06-04 | Charging control circuit based on adjustable battery pack cascaded structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820855068.1U CN208623347U (en) | 2018-06-04 | 2018-06-04 | Charging control circuit based on adjustable battery pack cascaded structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208623347U true CN208623347U (en) | 2019-03-19 |
Family
ID=65701530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820855068.1U Expired - Fee Related CN208623347U (en) | 2018-06-04 | 2018-06-04 | Charging control circuit based on adjustable battery pack cascaded structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208623347U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649646A (en) * | 2018-06-04 | 2018-10-12 | 李勇 | Charging control circuit and its control method based on adjustable battery pack cascaded structure |
-
2018
- 2018-06-04 CN CN201820855068.1U patent/CN208623347U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649646A (en) * | 2018-06-04 | 2018-10-12 | 李勇 | Charging control circuit and its control method based on adjustable battery pack cascaded structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190319 Termination date: 20200604 |