CN108091949A - Voltage sampling circuit, battery protecting plate and battery pack - Google Patents
Voltage sampling circuit, battery protecting plate and battery pack Download PDFInfo
- Publication number
- CN108091949A CN108091949A CN201711467373.XA CN201711467373A CN108091949A CN 108091949 A CN108091949 A CN 108091949A CN 201711467373 A CN201711467373 A CN 201711467373A CN 108091949 A CN108091949 A CN 108091949A
- Authority
- CN
- China
- Prior art keywords
- battery core
- core group
- battery
- sampling circuit
- voltage sampling
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a kind of voltage sampling circuit, battery protecting plate and battery pack, voltage sampling circuit is used to gather the voltage value of the battery core group of multiple series connection respectively, and the first sampled point of the voltage sampling circuit is arranged in the middle part of the connecting line of two neighboring battery core group.It is unreasonable in sampled point arrangement in compared with the prior art, pressure drop between each battery core group differs, the voltage for causing acquisition is different, it discharges so as to cause battery core uneven, sampled point is arranged in the middle part of the connecting line of two neighboring battery core group by the application, the pressure difference that can be more effectively ensured between battery core group is more uniform, can greatly improve the uniformity of battery core group voltage sample, and then improve the service life of battery core group.
Description
Technical field
The present invention relates to battery core technical fields, and in particular to a kind of voltage sampling circuit, battery protecting plate and battery pack
Background technology
The application of battery core is more and more extensive at present, and consumption figure is increasing, in general, single-unit battery core is difficult to meet actual need
It asks, it is necessary to go here and there mostly and battery core to meet its use demand, for example, laptop battery core generally use 2-4 strings, more and electricity more
Core group, as more strings are more and the application of battery core group is more and more extensive, the service life of battery core is especially concerned.
Since battery core group includes multiple battery cores, in the prior art to extend the service life of battery core group, produce or assemble in battery core
Shi Jinhang crosses strict technology control, improves the service life of battery core, usually also uses and overcharges protection, over, short-circuit protection etc.
Method extends battery core service life or more advanced battery core also with battery core balance module, and the voltage of balanced each battery core ensures
The uniformity of battery core voltage can also improve the service life of battery core.However, during the use of battery core, often there is battery core
Service life is too short to have big difference with projected life.
Therefore, how to improve the battery core group service life becomes the technical issues of urgently to be resolved hurrily.
The content of the invention
The technical problem to be solved in the present invention is to improve the battery core group service life.
According in a first aspect, an embodiment of the present invention provides a kind of voltage sampling circuit, for gathering multiple series connection respectively
Battery core group voltage value, the first sampled point of voltage sampling circuit is arranged in the middle part of the connecting line of two neighboring battery core group.It can
To solve to differ due to the pressure drop between sampled point position caused each battery core group placed in the middle, the voltage of acquisition is different, electricity
The problem of core electric discharge is uneven, sampled point is arranged in the middle part of the connecting line of two neighboring battery core group by the application, can more effectively
Ensure that the pressure difference between battery core group is more uniform, the uniformity of battery core group voltage sample can be greatly improved, and then improve battery core
The service life of group.
Optionally, battery core group includes the battery core of at least one parallel connection.
Optionally, voltage sampling circuit further includes：Second voltage point is separately positioned on the whole story of the battery core group of multiple series connection
Both ends, the distance that the second sampled point arrives battery core group whole story both ends respectively are equal.
According to second aspect, an embodiment of the present invention provides a kind of battery protecting plate, including：Such as first aspect any one
The voltage sampling circuit of description.
According to the third aspect, an embodiment of the present invention provides a kind of battery pack, including：Such as the electricity described in above-mentioned second aspect
Pond protection board；The battery core group of multiple series connection is welded on the corresponding position of battery protecting plate.
Voltage sampling circuit provided in an embodiment of the present invention, battery protecting plate and battery pack, voltage sampling circuit for point
The voltage value of the battery core group of multiple series connection is not gathered, and the first sampled point of voltage sampling circuit is arranged on two neighboring battery core group
In the middle part of connecting line.Unreasonable in sampled point arrangement in compared with the prior art, the pressure drop between each battery core group differs, and causes to adopt
The voltage of collection is different, discharges so as to cause battery core uneven, sampled point is arranged on the connecting line of two neighboring battery core group by the application
Middle part, the pressure difference that can be more effectively ensured between battery core group is more uniform, can greatly improve the one of battery core group voltage sample
Cause property, and then improve the service life of battery core group.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 shows the position view of the sampled point of voltage sampling circuit in the prior art；
Fig. 2 shows the schematic diagram of the position of the sampled point of the voltage sampling circuit of the embodiment of the present invention.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, it can be with
It is the connection inside two elements, can is wireless connection or wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Due to passing through more stringent a series of manufacturing process, quality management and control, for example, material in single battery core production process
The formula of material, the improvement of technique, battery core chemical conversion conformity classification, formation device verification and environment temperature management and control etc., in battery core
During assembling, voltage, internal resistance to battery core carry out more stringent screening pairing again, no matter are producing or are assembling
Through having carried out stringent control, however, battery core service life too short situation is there is also during battery core use, by surveying
Examination, although it has been found that the voltage uniformity of each battery core is higher before assembling, after battery core is completed, in battery core
In the case that balance module works normally, the pressure difference of each battery core is larger, and the voltage of each battery core electric discharge is inconsistent, therefore, applicant
A kind of voltage sampling circuit is proposed to solve the problems, such as that each battery core pressure difference in assembled battery core group is big.
An embodiment of the present invention provides a kind of voltage sampling circuits, as depicted in figs. 1 and 2, what which was gathered
Voltage data is provided to the microprocessor 40 of battery protecting plate, and protection, over and battery core equilibrium are overcharged for battery core
Immediate data source is provided, as shown in Fig. 2, the first sampled point 10 of the voltage sampling circuit is arranged on corresponding two battery core groups 20
Line in the middle part of.Sampled point of alleged first sampled point 10 between the battery core group 20 of series connection, in the particular embodiment, due to
There is the phenomenon that pressure difference is big in assembled battery core, and by checking, the various pieces including battery core balance module are not asked
Topic, it has been found that the problem of being set due to the sampled point of voltage sampling circuit, causes sampled data deviation occur, specifically,
In the prior art, as shown in Figure 1, sampled point is often arbitrarily set, in more string battery core groups 20, the position that each sampled point is set is not
Fixed, first sampled point 11 may be close to some battery core group 20, another possible close battery core group 20 of another sampled point 11,
Since battery core group 20 is welded on battery protecting plate, each battery core group 20 is connected by copper clad layers on battery protecting plate, copper clad layers
Internal resistance can cause battery core group 20 additional pressure drop, and unreasonable in sampled point arrangement, the pressure drop between each battery core group 20 differs,
The voltage for causing acquisition is different, discharges so as to cause battery core uneven, for a long time in this way, each battery core voltage can be caused inconsistent, into
And cause the lost of life of battery core group.Therefore, in embodiments of the present invention, the first sampled point 10 is arranged on multiple series connection
The middle part of connecting line between battery core group 20.It can ensure that the pressure difference between battery core group 20 is more uniform, electricity can be greatly improved
The uniformity of 20 voltage sample of core group.
To ensure to more accurately control the pressure difference between battery core group 20, in an alternate embodiment of the invention, as shown in Fig. 2, more
The whole story both ends of the battery core group 20 of a series connection are the positive and negative anodes of entire battery core group 20, set second sampled point 30, tool respectively
Body, distance of second sampled point 30 respectively apart from both ends is equal.
The effect of embodiment to illustrate the invention, applicant have carried out dynamic differential pressure test to the battery core group after assembling, i.e.,
The voltage difference between the battery core group of multiple series connection is tested, using more stringent standard as standard, which can be：Pressure difference is big
In 20 millivolts to be unqualified, first group：500 samples before improvement are tested, wherein there are 11 pressure differences to be more than 20 millivolts
Defective products tests improved 500 samples, it is found that no pressure difference is more than 20 millivolts of defective products.Second group, to changing
It is tested into 1000 preceding samples, wherein having the defective products that 19 pressure differences are more than 20 millivolts, to improved 1000 samples
Product are tested, wherein there is the defective products that 2 pressure differences are more than 20 millivolts.It compares, more can significantly see by test data
Go out, by collection point being arranged in the middle part of the connecting line of two neighboring battery core group, can more effectively reduce each battery core group it
Between pressure difference.
In the present embodiment, applicant has also carried out contrast test to the service life of battery core group, to before improving and improved
The charging cycle test that sample carries out respectively, after charge and discharge 1000 times, the capacity attenuation of the battery core group of the sample before improvement
30%, and sample battery core pool-size attenuation 18% after improving.It, can by the attenuation of battery core pool-size after 1000 charge and discharge cycles
More, it is evident that be arranged on by collection point in the middle part of the connecting line of two neighboring battery core group, more can effectively improve
The service life of battery core group.
The embodiment of the present invention additionally provides a kind of battery protecting plate, and the voltage sampling circuit of the battery protecting plate is using above-mentioned
Voltage sampling circuit in embodiment can improve the service life of battery core group.
The embodiment of the present invention additionally provides a kind of battery pack, including：In the battery core group and above-described embodiment of multiple series connection
The battery protecting plate of description, battery core group welding is in the corresponding position of battery protecting plate.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modification can be adapted in the case of bright spirit and scope and modification, and such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (5)
1. a kind of voltage sampling circuit, for gathering the voltage value of the battery core group of multiple series connection respectively, which is characterized in that the electricity
First sampled point of pressure sample circuit is arranged in the middle part of the connecting line of two neighboring battery core group.
2. voltage sampling circuit as described in claim 1, which is characterized in that the battery core group includes the electricity of at least one parallel connection
Core.
3. voltage sampling circuit as claimed in claim 1 or 2, which is characterized in that further include：
Second sampled point, is separately positioned on the whole story both ends of the battery core group of the multiple series connection, and second sampled point arrives respectively
The distance at the battery core group whole story both ends is equal.
4. a kind of battery protecting plate, which is characterized in that including：
Voltage sampling circuit as described in claim 1-3 any one.
5. a kind of battery pack, which is characterized in that including：
Battery protecting plate as claimed in claim 4；
The battery core group of multiple series connection is welded on the corresponding position of the battery protecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711467373.XA CN108091949A (en) | 2017-12-27 | 2017-12-27 | Voltage sampling circuit, battery protecting plate and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711467373.XA CN108091949A (en) | 2017-12-27 | 2017-12-27 | Voltage sampling circuit, battery protecting plate and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108091949A true CN108091949A (en) | 2018-05-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711467373.XA Pending CN108091949A (en) | 2017-12-27 | 2017-12-27 | Voltage sampling circuit, battery protecting plate and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108091949A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114464904A (en) * | 2022-01-19 | 2022-05-10 | 岚图汽车科技有限公司 | Lithium battery module and system thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103547042A (en) * | 2013-11-07 | 2014-01-29 | 成都启臣微电子有限公司 | LED constant current drive circuit based on power factor correction |
| CN105958140A (en) * | 2016-06-29 | 2016-09-21 | 广东亿纬赛恩斯新能源系统有限公司 | Lithium ion power battery protection device and method |
-
2017
- 2017-12-27 CN CN201711467373.XA patent/CN108091949A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103547042A (en) * | 2013-11-07 | 2014-01-29 | 成都启臣微电子有限公司 | LED constant current drive circuit based on power factor correction |
| CN105958140A (en) * | 2016-06-29 | 2016-09-21 | 广东亿纬赛恩斯新能源系统有限公司 | Lithium ion power battery protection device and method |
Non-Patent Citations (1)
| Title |
|---|
| 王晓明编著: "《单片机教程》", 31 December 2001 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114464904A (en) * | 2022-01-19 | 2022-05-10 | 岚图汽车科技有限公司 | Lithium battery module and system thereof |
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Application publication date: 20180529 |