CN106532861B - Differential full-charge judgment and measurement structure for rechargeable battery - Google Patents
Differential full-charge judgment and measurement structure for rechargeable battery Download PDFInfo
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- CN106532861B CN106532861B CN201611236680.2A CN201611236680A CN106532861B CN 106532861 B CN106532861 B CN 106532861B CN 201611236680 A CN201611236680 A CN 201611236680A CN 106532861 B CN106532861 B CN 106532861B
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- 238000005259 measurement Methods 0.000 title claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 abstract description 16
- 230000007774 longterm Effects 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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Abstract
The invention discloses a differential full-charge judgment and measurement structure for a rechargeable battery, which comprises an intelligent control chip, a charging module, a discharging module and a battery pack, wherein the intelligent control is newly and respectively connected with the charging module, the discharging module and the battery pack, the charging module is also and respectively connected with the battery pack and the discharging module, and the battery pack is also connected with the discharging module. The data are collected and summarized in a long-term experiment, and experiments show that the method not only can enable the battery to be easily charged to a full-charge state, but also can better reduce the damage of the battery in the full-charge state.
Description
Technical Field
The invention relates to an intelligent charging technology, in particular to a differential full-charge judgment and measurement structure for a rechargeable battery.
Background
At present, two judgment conditions of full charge state are used in the charging process of the rechargeable battery by the charger.
One is a fixed voltage method. The state of full charge of the battery is judged by using the standard full voltage set by the state. This method is used by 90% more users.
One is to determine the full charge state of the battery by a voltage drop method. The charging voltage of the battery is detected in the charging process, and after the battery is detected to reach the highest charging point, if the voltage of the battery begins to drop to a certain voltage value, the battery is judged to be in a full-charge state.
Fixed voltage method. The specified average voltage is determined by the battery manufacturer's battery manufactured according to the national standard. The judgment method has the advantage of simple and uniform judgment conditions. The disadvantage is that not every cell produced has a full charge and performance that is exactly at a fixed full charge value. There will always be a deviation from a fixed value. The full-charge voltage deviation may result in some batteries always having a slightly overcharged state or a slightly undercharged state. The slightly overcharged or underfilled state is not much affected when the battery is new, but is slowly accumulated into a large difference in the daily charging and discharging processes of the battery by a user, and is one of important reasons which finally cause the battery to be overcharged and swelled.
The full-charge state judgment condition of the voltage drop method has the advantages that the judgment effect is better compared with that of the first fixed voltage method, and the full charge of the battery can be more accurately judged than that of the fixed voltage method. But the disadvantage is that the battery always comes into slight overcharge before it can be known whether the battery is fully charged. Because when the battery reaches the highest point of charge, the battery capacity is charged to the most saturated state at this moment, and the phenomena of high temperature rise, air pressure increase and the like are accompanied. The battery is easily damaged at this point once it has been overcharged to a dangerous value. Therefore, this charging mode is not used in a lithium battery charger, because the lithium battery requires a high full voltage accuracy, and the battery is easily damaged by a little overcharge.
Disclosure of Invention
It is an object of the present invention to provide a differential full charge determination measurement structure for a rechargeable battery to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a difference is full to charge and judges measurement structure, includes intelligent control chip, the module of charging, the module of discharging and group battery, intelligent control newly connects the module of charging, the module of discharging and group battery respectively, the module of charging and still connect the group battery respectively and the module of discharging, the group battery is still connected the module of discharging.
As a further scheme of the invention: the battery pack is formed by connecting a plurality of batteries in series.
Compared with the prior art, the invention has the beneficial effects that: the device of the invention judges the charging state, and when the battery reaches the full-charge state, the temperature rise and the increase of the air pressure are not obvious. The data are collected and summarized in a long-term experiment, and experiments show that the method not only can enable the battery to be easily charged to a full-charge state, but also can better reduce the damage of the battery in the full-charge state.
Description of the drawings:
fig. 1 is an overall block diagram of the present invention.
Fig. 2 is a graph of a battery charging process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a differential full charge determination and measurement structure for a rechargeable battery includes an intelligent control chip, a charging module, a discharging module and a battery pack, wherein the intelligent control chip is respectively connected to the charging module, the discharging module and the battery pack, the charging module is further respectively connected to the battery pack and the discharging module, and the battery pack is further connected to the discharging module.
The battery pack is formed by connecting a plurality of batteries in series.
The working principle of the invention is as follows: as shown in fig. 2:
pressure difference in the underfilled period
Ux (1) = Us1-UD1, Us1 minus UD1 is less than constant K;
ux (2) = Us2-UD2, Us2 minus UD2 is less than constant K;
pressure difference at full electricity stage
Ux（n-1）=Us （n-1） -UD （n-1），
Us (n-1) minus UD (n-1) is greater than a constant K;
Ux（n）=Us （n） -UD （n），
us (n) minus UD (n) is greater than a constant K;
the full state of the battery can be detected by calculating the differential pressure.
The full power is judged to be accurate compared with the fixed voltage value,
it is safer than the voltage drop method to judge full electricity.
This determination method can actually achieve true and differential full charge values for each battery over the previous 2 full charge determinations, and also does not result in a slightly overcharged or slightly undercharged state for the battery.
Claims (2)
1. A differential full-charge judgment and measurement structure for a rechargeable battery comprises an intelligent control chip, a charging module, a discharging module and a battery pack, and is characterized in that the intelligent control chip is respectively connected with the charging module, the discharging module and the battery pack, the charging module is also respectively connected with the battery pack and the discharging module, and the battery pack is also connected with the discharging module; the differential full-charge determination measurement structure for the rechargeable battery can detect the full-charge state of the battery by calculating a differential pressure, wherein the differential pressure in the non-full-charge stage is Ux (1) Us1-UD1, and the difference between Us1 and UD1 is less than a constant K; ux (2) ═ Us2-UD2, Us2 minus UD2 is less than constant K; the differential pressure in the full-electricity stage is Ux (n-1) ═ Us (n-1) -UD (n-1), and the difference between Us (n-1) and UD (n-1) is greater than a constant K; ux (n) us (n) -ud (n), us (n) minus ud (n) is greater than a constant K.
2. The differential full charge determination measurement structure for the rechargeable battery according to claim 1, wherein the battery pack is formed by connecting a plurality of batteries in series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611236680.2A CN106532861B (en) | 2016-12-28 | 2016-12-28 | Differential full-charge judgment and measurement structure for rechargeable battery |
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| CN201611236680.2A CN106532861B (en) | 2016-12-28 | 2016-12-28 | Differential full-charge judgment and measurement structure for rechargeable battery |
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| CN106532861B true CN106532861B (en) | 2020-04-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204928322U (en) * | 2015-09-11 | 2015-12-30 | 浙江超威创元实业有限公司 | Electric motor car is with wireless rechargeable battery group and electric motor car |
| CN105743127A (en) * | 2016-04-27 | 2016-07-06 | 国电南瑞科技股份有限公司 | Household new energy power generation intelligent control system and control method |
| CN106154175A (en) * | 2016-06-29 | 2016-11-23 | 成都雅骏新能源汽车科技股份有限公司 | Rechargeable battery state-of-charge estimating system and workflow based on dynamic differential pressure |
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- 2016-12-28 CN CN201611236680.2A patent/CN106532861B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204928322U (en) * | 2015-09-11 | 2015-12-30 | 浙江超威创元实业有限公司 | Electric motor car is with wireless rechargeable battery group and electric motor car |
| CN105743127A (en) * | 2016-04-27 | 2016-07-06 | 国电南瑞科技股份有限公司 | Household new energy power generation intelligent control system and control method |
| CN106154175A (en) * | 2016-06-29 | 2016-11-23 | 成都雅骏新能源汽车科技股份有限公司 | Rechargeable battery state-of-charge estimating system and workflow based on dynamic differential pressure |
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