CN109842179A - Battery pack detection circuit and detection method - Google Patents
Battery pack detection circuit and detection method Download PDFInfo
- Publication number
- CN109842179A CN109842179A CN201910144730.1A CN201910144730A CN109842179A CN 109842179 A CN109842179 A CN 109842179A CN 201910144730 A CN201910144730 A CN 201910144730A CN 109842179 A CN109842179 A CN 109842179A
- Authority
- CN
- China
- Prior art keywords
- electric current
- control circuit
- battery pack
- current
- difference
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The present invention proposes a kind of battery pack detection circuit and detection method, the battery pack detection circuit includes first control circuit, first control circuit controls the first battery pack, the initial current for flowing through first control circuit is the first electric current, and the first control circuit adjusts the electric current for flowing through first control circuit according to the difference of the first electric current and expectation electric current.The present invention can reduce the difference of electric current between battery pack, so that the electric voltage equalization between battery pack.
Description
Technical field
The present invention relates to field of power electronics, in particular to a kind of battery pack detection circuit and control method.
Background technique
In the prior art, referring to Fig.1, prior art battery pack detection circuit, including two battery packs and two are illustrated
A control circuit, first control circuit control the first battery pack, and the initial current for flowing through first control circuit is equivalent to the first electricity
The output electric current I1 in stream source；Second control circuit controls the second battery pack, and the initial current for flowing through second control circuit is equivalent to
The output electric current I2 of second current source.Under normal circumstances, I1=I2, due to electronic device process etc., electric current I1 and electric current
The actual size of I2 differs larger with expection.If I1 > I2, the electric current for flowing through the first battery pack is I3, flows through the second battery pack
Electric current be I4, then to battery pack charge when, meet I1+I3=I2+I4, due to I1>I2, then I3<I4, i.e. the second battery pack are filled
It is electric fast；When to battery power discharge, meet I3-I1=I4-I2, due to I1 > I2, then I3 > I4, i.e. the first battery power discharge are fast；Instead
It, the charging of the first battery pack is fast, and the second battery power discharge is fast.First battery pack or the second battery pack charge too fast or discharge
Too fast, the voltage that will cause in battery pack is unbalanced.
Summary of the invention
It is of the existing technology for solving the object of the present invention is to provide a kind of battery pack detection circuit and control method
The excessive problem of current differential between battery pack.
To achieve the above object, the present invention provides a kind of battery pack detection circuit, including first control circuit, the first controls
The first battery pack of circuit control processed, the initial current for flowing through first control circuit is the first electric current, the first control circuit root
The electric current for flowing through first control circuit is adjusted according to the difference of the first electric current and expectation electric current.
Optionally, the battery pack detection circuit further includes second control circuit, and second control circuit controls the second battery
Group, the initial current for flowing through second control circuit is the second electric current, and the first battery electrode connects the second battery anode；It is described
Second control circuit is adjusted according to the difference of the second electric current and expectation electric current flows through the electric current of second control circuit, so that flowing through the
The electric current of one control circuit and the difference for the electric current for flowing through second control circuit are less than or equal to first threshold, and the expectation electric current is big
In the maximum value being equal in the first electric current and the second electric current.
Optionally, the battery pack detection circuit further includes multiple control circuits, each control circuit control corresponding one
A battery pack is connected between each battery pack；Each control circuit is respectively according to the difference phase of its initial current and expectation electric current
The electric current of each control circuit should be adjusted, so that the difference between the electric current of every two control circuit is less than or equal to first threshold,
The expectation electric current is more than or equal to the maximum value in all control circuit initial currents.
Optionally, the first control circuit includes n current source in parallel, and k-th of current source output electric current is 2k-1I,
Wherein, k≤n, I are first unit electric current；Multiple current source conductions are controlled according to the difference of the first electric current and expectation electric current to adjust
The electric current of first control circuit of throttling is close to expectation electric current.
Optionally, the second control circuit includes m current source in parallel, and j-th of current source output electric current is 2j-1I,
Wherein, j≤m, I are first unit electric current；Multiple current source conductions are controlled according to the difference of the second electric current and expectation electric current to adjust
The electric current of second control circuit of throttling makes it closest to expectation electric current.
Optionally, each control circuit of multiple control circuits includes N (N >=2) a current source, i-th of current source
Exporting electric current is 2i-1I, wherein i≤N, I are first unit electric current；Distinguished according to the difference of each control circuit and expectation electric current
Control multiple current source conductions in corresponding control circuit makes it respectively close to phase to adjust the electric current of each control circuit respectively
The expectation electric current answered.
Optionally, the value of N is different in different control circuits.
Optionally, the first threshold is first unit electric current.
Optionally, the difference between every two battery pack current is less than or equal to first threshold.
The present invention also provides a kind of battery pack detection method, first control circuit controls the first battery pack, flows through the first control
The initial current of circuit processed is the first electric current, and the first control circuit is adjusted according to the difference of the first electric current and expectation electric current to flow
Cross the electric current of first control circuit.
Optionally, second control circuit controls the second battery pack, and the initial current for flowing through second control circuit is the second electricity
Stream, the first battery electrode connect the second battery anode；The second control circuit is according to the second electric current and expectation electric current
Difference adjusts the electric current for flowing through second control circuit, so that flowing through the electric current of first control circuit and flowing through second control circuit
The difference of electric current is less than or equal to first threshold, and the expectation electric current is more than or equal to the maximum value in the first electric current and the second electric current.
Optionally, there are also multiple control circuits to control corresponding multiple battery packs respectively, connects between each battery pack；Often
A control circuit adjusts the electric current for flowing through each control circuit according to the difference of its initial current and expectation electric current respectively, so that stream
The difference crossed between the electric current of every two control circuit is less than or equal to first threshold, and the expectation electric current is more than or equal to all controls
Maximum value in circuit initial current.
Compared with prior art, the invention has the following advantages that the present invention includes first control circuit, first control circuit
The first battery pack is controlled, the initial current for flowing through first control circuit is the first electric current, and the first control circuit is according to first
The difference of electric current and expectation electric current adjusts the electric current for flowing through first control circuit.The present invention can flow through battery pack by adjusting
Electric current reduces the difference of electric current between battery pack, so that the electric voltage equalization between battery pack.
Detailed description of the invention
Fig. 1 is prior art battery pack detection circuit；
Fig. 2 is battery pack detection circuit of the present invention；
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, to convenient, the lucidly aid illustration embodiment of the present invention the mesh
's.
As shown in Fig. 2, illustrate battery pack detection circuit schematic diagram of the present invention, including the first battery pack, the second battery pack,
First control circuit and second control circuit, first control circuit control the first battery pack, the second electricity of second control circuit control
Pond group.The present invention is not limited only to two battery packs and its phase only by taking two battery packs and its corresponding control circuit as an example
Control circuit is answered, the present invention can be with only one battery pack and its corresponding control circuit, can also be there are two above battery pack
And its corresponding detection circuit.The initial current for flowing through first control circuit is the first electric current, is equivalent to the first current source I1's
Electric current is exported, the initial current for flowing through second control circuit is the second electric current, is equivalent to the output electric current of the second current source I2；It adjusts
After section, the electric current for flowing through first control circuit is I1 ', and the electric current for flowing through second control circuit is the second electric current I2 '.First control
Circuit and second control circuit are generally integrated in piece, and electric current I1 ' and I2 ' are the electricity that respective battery group is flowed to from respective chip
Stream.First control circuit is adjusted according to the difference of the first electric current and expectation electric current flows through the electric current of first control circuit, and described the
Two control circuits adjust the electric current for flowing through second control circuit according to the difference of the second electric current and expectation electric current, so that flowing through first
Difference between the electric current of control circuit and the electric current for flowing through second control circuit is less than or equal to first threshold, the expectation electric current
More than or equal to the maximum value in the first electric current and the second electric current.First control circuit further includes n current source, k-th of current source
Exporting electric current is 2k-1I, wherein k≤n, I are first unit electric current.Second control circuit further includes m current source in parallel, the
J current source output electric current is 2j-1I, wherein j≤m, m and n can be equal, and I is first unit electric current.It is assumed that current source I1 is defeated
Electric current is 20uA out, and the output electric current of current source I2 is 10uA, that is, the initial current for flowing through first control circuit is 20uA, is flowed through
The initial current of second control circuit is 10uA；It is assumed that expectation electric current is 31uA, first unit electric current is 2uA, then the first control
Circuit control the 1st current source therein and the 3rd current source conduction, second control circuit control the 2nd current source therein
With the 4th current source conduction.After adjusting, the electric current for flowing through first control circuit is 20uA+2*20uA+2*22UA=30uA flows through
The electric current of second control circuit is 10uA+2*21uA+2*23UA=30uA, flowed through after adjusting first control circuit electric current I1 ' and
The electric current I2 ' for flowing through second control circuit is equal.Due to meeting I3+I1 '=I4+I2 ', then flowing through in battery pack charging process
The electric current I3 of first battery pack and the electric current I4 for flowing through the second battery pack are also equal, so that battery pack battery in charge and discharge process
Electric voltage equalization.Usually, the electric current for flowing through control circuit is adjustable to expectation electric current ± 1/2I, the electricity of different control circuits
The difference of stream is up to I after overregulating.In above-mentioned hypothesis, the electric current for originally flowing through second control circuit is 10uA, it is assumed that second
Control circuit controls the 1st current source therein and the 2nd current source and the 4th current source conduction, and the second control is flowed through after adjusting
The electric current of circuit processed is 10uA+2*20uA+2*21uA+2*23UA=32uA；, then its with flow through first control circuit after adjusting
Electric current differs 2uA (I), then the electric current I3 and electric current I4 for flowing through the second battery pack for flowing through the first battery pack also differs 2uA, and
The initial current between battery pack differs 10uA before, thus, the battery pack current gap after adjusting is obviously reduced, and is conducive to
Electric voltage equalization during battery set charge/discharge.Adjusting can be further decreased by reducing I according to practical application request
Battery pack current gap afterwards.It is assumed that only one battery pack of the invention and corresponding control circuit, then inclined according to the technique of circuit
Difference setting expectation electric current, so that flowing through the electric current of battery pack in an accurate range.It is assumed that the present invention has multiple batteries
Group and its corresponding control circuit, then the current source number in each control circuit may be the same or different.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (12)
1. a kind of battery pack detection circuit, it is characterised in that: including first control circuit, first control circuit controls the first battery
Group, the initial current for flowing through first control circuit is the first electric current, and the first control circuit is according to the first electric current and expectation electricity
The difference of stream adjusts the electric current for flowing through first control circuit.
2. battery pack detection circuit according to claim 1, it is characterised in that: the battery pack detection circuit further includes
Two control circuits, second control circuit control the second battery pack, and the initial current for flowing through second control circuit is the second electric current, the
One battery electrode connects the second battery anode；The second control circuit is according to the difference tune of the second electric current and expectation electric current
Throttled the electric current of second control circuit, so that flowing through the electric current of first control circuit and flowing through the electric current of second control circuit
Difference is less than or equal to first threshold, and the expectation electric current is more than or equal to the maximum value in the first electric current and the second electric current.
3. battery pack detection circuit according to claim 1, it is characterised in that: the battery pack detection circuit further includes more
A control circuit, each control circuit control a corresponding battery pack, connect between each battery pack；Each control circuit point
The electric current for not adjusting each control circuit accordingly according to the difference of its initial current and expectation electric current, so that every two control circuit
Electric current between difference be less than or equal to first threshold, the expectation electric current be more than or equal to all control circuit initial currents in
Maximum value.
4. battery pack detection circuit according to claim 1, it is characterised in that: the first control circuit includes n a simultaneously
The current source of connection, k-th of current source output electric current is 2k-1I, wherein k≤n, I are first unit electric current；According to the first electric current and
The difference of expectation electric current controls multiple current source conductions to adjust and flow through the electric current of first control circuit and be close to expectation electric current.
5. battery pack detection circuit according to claim 2, it is characterised in that: the second control circuit includes m a simultaneously
The current source of connection, j-th of current source output electric current is 2j-1I, wherein j≤m, I are first unit electric current；According to the second electric current and
The difference of expectation electric current control multiple current source conductions with adjust flow through second control circuit electric current make its closest to expectation electricity
Stream.
6. battery pack detection circuit according to claim 3, it is characterised in that: each control of multiple control circuits
Circuit includes N (N >=2) a current source, and i-th of current source output electric current is 2i-1I, wherein i≤N, I are first unit electric current；
Control multiple current source conductions in corresponding control circuit respectively according to the difference of each control circuit and expectation electric current with respectively
The electric current for adjusting each control circuit makes it respectively close to corresponding expectation electric current.
7. battery pack detection circuit according to claim 6, it is characterised in that: the value of N is not in different control circuits
Together.
8. battery pack detection circuit according to claim 1,2 or 3, it is characterised in that: the first threshold is first single
Elementary current.
9. battery pack detection circuit according to claim 3, it is characterised in that: the difference between every two battery pack current
Less than or equal to first threshold.
10. a kind of battery pack detection method, it is characterised in that: first control circuit controls the first battery pack, flows through the first control
The initial current of circuit is the first electric current, and the first control circuit is flowed through according to the adjusting of the difference of the first electric current and expectation electric current
The electric current of first control circuit.
11. battery pack detection method according to claim 10, it is characterised in that: second control circuit controls the second battery
Group, the initial current for flowing through second control circuit is the second electric current, and the first battery electrode connects the second battery anode；It is described
Second control circuit is adjusted according to the difference of the second electric current and expectation electric current flows through the electric current of second control circuit, so that flowing through the
The electric current of one control circuit and the difference for the electric current for flowing through second control circuit are less than or equal to first threshold, and the expectation electric current is big
In the maximum value being equal in the first electric current and the second electric current.
12. battery pack detection method according to claim 10, it is characterised in that: controlled respectively there are also multiple control circuits
Corresponding multiple battery packs are connected between each battery pack；Each control circuit is respectively according to its initial current and expectation electric current
Difference adjust and flow through the electric current of each control circuit so that the difference for flowing through between the electric current of every two control circuit is less than etc.
In first threshold, the expectation electric current is more than or equal to the maximum value in all control circuit initial currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910144730.1A CN109842179A (en) | 2019-02-27 | 2019-02-27 | Battery pack detection circuit and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910144730.1A CN109842179A (en) | 2019-02-27 | 2019-02-27 | Battery pack detection circuit and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109842179A true CN109842179A (en) | 2019-06-04 |
Family
ID=66885036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910144730.1A Pending CN109842179A (en) | 2019-02-27 | 2019-02-27 | Battery pack detection circuit and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109842179A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409457A (en) * | 2007-10-08 | 2009-04-15 | 凹凸科技（中国）有限公司 | Equalization circuit and method for charging battery set |
| CN101800436A (en) * | 2009-02-11 | 2010-08-11 | 凹凸电子（武汉）有限公司 | Circuit and method for cell balancing, and cell management system |
| CN107919504A (en) * | 2017-12-15 | 2018-04-17 | 杰华特微电子（杭州）有限公司 | A kind of battery equalizing circuit and control method |
-
2019
- 2019-02-27 CN CN201910144730.1A patent/CN109842179A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409457A (en) * | 2007-10-08 | 2009-04-15 | 凹凸科技（中国）有限公司 | Equalization circuit and method for charging battery set |
| CN101800436A (en) * | 2009-02-11 | 2010-08-11 | 凹凸电子（武汉）有限公司 | Circuit and method for cell balancing, and cell management system |
| CN107919504A (en) * | 2017-12-15 | 2018-04-17 | 杰华特微电子（杭州）有限公司 | A kind of battery equalizing circuit and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209250230U (en) | Improve the single-wafer battery protecting circuit and charge-discharge circuit of anti-peak voltage ability | |
| WO2021043202A1 (en) | Dual-battery voltage balancing method and dual-battery voltage balancing circuit | |
| CN110380474A (en) | Battery protection controller and battery charge/discharge protection circuit | |
| CN106849288B (en) | Battery module connecting circuit and energy storage device | |
| CN106849645A (en) | A kind of charging circuit, method and electronic installation | |
| TW201301715A (en) | Battery management system, method and non-transitory computer readable media | |
| CN108521115A (en) | A kind of primary controller and Switching Power Supply of Switching Power Supply | |
| CN109861329A (en) | Linear charging systems, constant-current and constant-voltage control circuit and its voltage follow control method | |
| CN106300314A (en) | The high voltage protective system and method for Type C interface chip CC pin | |
| CN106207296A (en) | Charging method | |
| CN104901373B (en) | Balance-type charger and method | |
| CN106300550A (en) | The equalizing circuit of a kind of lithium battery big electric current of energy transfer type and balance control method | |
| CN105322532B (en) | Direct-current grid energy storage optimization and control method for coordinating | |
| CN101728862B (en) | Charging circuit and charging current transformation method | |
| CN107768195A (en) | Pre-charge circuit built in D.C. contactor and its control method | |
| KR102196926B1 (en) | A power management apparatus capable of switching a plurality of battery cells in series or in parallel | |
| CN113178929B (en) | Power device and battery management system | |
| CN106786879A (en) | Battery pack charge control method and charging assembly | |
| CN205945143U (en) | Charging circuit , system and mobile terminal | |
| CN107317059B (en) | Battery protection chip cascaded equalization control circuit | |
| CN108321773A (en) | Detection circuit and apply its electronic device | |
| CN106230040B (en) | Charging unit and its charging method | |
| CN219085102U (en) | Detection gating module, battery management system and battery management chip | |
| CN109842179A (en) | Battery pack detection circuit and detection method | |
| CN108258762A (en) | A kind of quick-charging circuit and intelligent terminal for pre-installing battery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190604 |