CN201134686Y - Charging device for lithium ion cell - Google Patents
Charging device for lithium ion cell Download PDFInfo
- Publication number
- CN201134686Y CN201134686Y CNU2007201710357U CN200720171035U CN201134686Y CN 201134686 Y CN201134686 Y CN 201134686Y CN U2007201710357 U CNU2007201710357 U CN U2007201710357U CN 200720171035 U CN200720171035 U CN 200720171035U CN 201134686 Y CN201134686 Y CN 201134686Y
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- battery
- management chip
- charging
- protection unit
- 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.)
- Expired - Lifetime
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 17
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims description 5
- 210000004027 cell Anatomy 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a charge device of a lithium ion battery, which comprises a power transformer which is connected with more than two three-end voltage regulators which are mutually connected in parallel, and each three-end voltage regulator is connected with a charging managing chip, and the charging managing chip is connected with a battery, which is used to charge for the battery. The charging managing chip also comprises a display unit and a temperature protection unit. The temperature protection unit comprises a negative temperature factor thermosensitive resistor NTC and a divider resistance, and the temperature protection unit detects the voltage value of the NTC, when the voltage value is bigger than a set value, the charging return circuit is off. The charge device of a lithium ion battery of the utility model has simpler structure and lower production cost, what is more important is that the charge device of the utility model also greatly improves the utilization ratio of charge energy source.
Description
[technical field]
The utility model relates to battery boosting technology, relates in particular to the lithium ion cell charging device.
[background technology]
The lithium ion battery group of high power capacity, high security has begun to get more and more and has been applied to various hand electric utensils, voltage that this application is had relatively high expectations and bigger electric current, the therefore general series connection application of adopting multisection lithium battery.
In multi-section serial battery, the difference in the battery will reduce the performance of entire cell bag, therefore need carry out equilibrium control to battery.At present the multi-section series lithium ionic cell group is carried out the balanced general circuit structure of controlling as shown in Figure 1, every joint lithium battery one group of equalizing resistance in parallel and balanced control metal-oxide-semiconductor, in charging process, when some cell voltage too high, or voltage rises too fastly, and the voltage of other battery is when also very low, and balanced control metal-oxide-semiconductor just can be opened, the lithium battery electric current that will to distribute a size of current be Vbat/Rn slows down the lithium battery drops or the rate of climb like this.
The weak point of above-mentioned balancing control circuit structure is, its balancing energy is that the form by heat sheds unnecessary energy, so both has been unfavorable for effective utilization of the energy, and the heat that sheds also can make the temperature of wiring board raise, and influences the performance of baffle.In addition, the algorithm complexity of this balanced control mode, the I/O port that needs is many, and cost is higher.
[summary of the invention]
Goal of the invention of the present utility model provides a kind of lithium ion cell charging device, to reach the purpose that improves energy utilization rate and reduce cost.
To achieve the above object of the invention, the utility model proposes following technical scheme:
A kind of lithium ion cell charging device, this device comprises:
Power transformer links to each other with two above three terminal regulators; Described three terminal regulator is parallel with one another, and each three terminal regulator and a charging management chip; Described charging management chip links to each other with a battery, is used for described battery is charged.
Wherein, the charging metal-oxide-semiconductor in the described charging management chip is built in chip
Wherein, described charging management chip also comprises display unit, and described display chip comprises two LED.
Wherein, described LED is respectively red light luminous when battery charge or luminous green light after battery is full of.
Wherein, described charging management chip also comprises the temperature protection unit; described temperature protection unit comprises negative tempperature coefficient thermistor NTC and divider resistance, and described temperature protection unit detects the magnitude of voltage of NTC, when described magnitude of voltage disconnects charge circuit during greater than set point.
As can be seen from the above technical solutions, the technical solution of the utility model is independently charged to each lithium battery to the pattern of series battery employing charged in parallel, and each charge circuit is relatively independent, can make each lithium battery reach fully charged state, thereby reach the equilibrium of another kind of form.Therefore, do not need balanced control switch pipe and equalizing resistance in the utility model circuit, do not need to carry out equilibrium yet, avoided the consumption of energy in the balancing procedure with the form of electric current shunting.In terms of existing technologies, charging device structure of the present utility model is comparatively simple, and cost is lower; The more important thing is that charging device of the present utility model has also greatly improved the charging rate of energy.
[description of drawings]
Fig. 1 is the partial circuit diagram of battery pack balancing control in the prior art;
Fig. 2 is the fundamental block diagram of the utility model lithium ion cell charging device;
Fig. 3 is the utility model lithium ion cell charging manipulated or operated apparatus;
Fig. 4 is the circuit diagram of charging management chip in the utility model.
[embodiment]
Below in conjunction with specific embodiment the technical solution of the utility model is described in detail.
For reaching goal of the invention, the utility model provides a kind of lithium ion cell charging device, and as shown in Figures 2 and 3, general device comprises power transformer, links to each other with two above three terminal regulators; Described three terminal regulator is parallel with one another, and each three terminal regulator and a charging management chip; Described charging management chip links to each other with a battery, is used for described battery is charged.
Wherein, power transformer generally can be multitap power transformer, draws n road power supply from multitap power transformer, and every road power supply is connected to three terminal regulator, in order to the voltage of thinking that charging management chip is suitable.Charging management chip generally can be chosen single lithium ion cell charging managing chip, and this chip generally has characteristics such as the charging metal-oxide-semiconductor is built-in, integrated level is high, peripheral circuit is simple.The general application circuit of charging management chip can be a circuit as shown in Figure 4.In a preferred embodiment, battery management chip can adopt XX chip and peripheral circuit thereof to realize.
The utility model carries out charged in parallel to series battery, each charge circuit all is separate, and all reach the state that is full of after each battery charge, whole Battery pack group also just is full of after each battery is full of, thereby reaches the state of each cell voltage unanimity in the series battery.In the utility model, because each battery is a charge independence, therefore in each battery charging process sometime too high the or voltage of cell voltage rise too fast, can not impact other batteries, do not need to carry out balancing energy control, thereby avoided tradition to divide streamed equilibrium, utilized to maximal efficiency rechargeable energy with battery.
In a preferred embodiment, charging management chip also comprises display unit, and described display chip comprises two LED, can glow respectively and green glow.Display unit can be that charging management chip carries, and bright when battery red light when charging, green light is bright after battery is full of.
In a preferred embodiment; charging management chip also comprises the temperature protection unit; described temperature protection unit comprises negative tempperature coefficient thermistor NTC and divider resistance, and described temperature protection unit detects the magnitude of voltage of NTC, when described magnitude of voltage disconnects charge circuit during greater than set point.
Every charging management chip all has temperature detecting function, so this circuit also can carry out temperature detection to every battery in charging process.Temperature detection is to constitute divider resistance by the thermistor NTC of husband's temperature coefficient and resistance to realize, the resistance of NTC reduces when the temperature of battery raises, then the pressure drop above it also reduces, charging management chip just disconnects charge circuit by detecting the temperature that this voltage just can detect cell body when temperature is higher than set point.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (5)
1, a kind of lithium ion cell charging device is characterized in that, this device comprises:
Power transformer links to each other with two above three terminal regulators; Described three terminal regulator is parallel with one another, and each three terminal regulator and a charging management chip; Described charging management chip links to each other with a battery, is used for described battery is charged.
2, charger for lithium ion battery according to claim 1 is characterized in that, the charging metal-oxide-semiconductor in the described charging management chip is built in chip
3, charger for lithium ion battery according to claim 1 is characterized in that, described charging management chip also comprises display unit, and described display chip comprises two LED.
4, charger for lithium ion battery according to claim 3 is characterized in that, described LED is respectively red light luminous when battery charge or luminous green light after battery is full of.
5, charger for lithium ion battery according to claim 1; it is characterized in that; described charging management chip also comprises the temperature protection unit; described temperature protection unit comprises negative tempperature coefficient thermistor NTC and divider resistance; described temperature protection unit detects the magnitude of voltage of NTC, when described magnitude of voltage disconnects charge circuit during greater than set point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201710357U CN201134686Y (en) | 2007-11-23 | 2007-11-23 | Charging device for lithium ion cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201710357U CN201134686Y (en) | 2007-11-23 | 2007-11-23 | Charging device for lithium ion cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134686Y true CN201134686Y (en) | 2008-10-15 |
Family
ID=40062955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201710357U Expired - Lifetime CN201134686Y (en) | 2007-11-23 | 2007-11-23 | Charging device for lithium ion cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134686Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888102A (en) * | 2009-05-15 | 2010-11-17 | 福特全球技术公司 | Vehicle power system |
| CN103647312A (en) * | 2013-12-01 | 2014-03-19 | 深圳市福田区青少年科技教育协会 | Safe and environment-friendly charger |
| CN104184315A (en) * | 2013-05-22 | 2014-12-03 | 海洋王（东莞）照明科技有限公司 | Power supply control circuit and power supply device |
| CN104578308A (en) * | 2015-01-25 | 2015-04-29 | 浙江大学 | Parallel connection charging module for AUV wireless charging |
| CN104578356A (en) * | 2015-01-25 | 2015-04-29 | 浙江大学 | AUV parallel charging machine adjustable in charging voltage and charging current |
-
2007
- 2007-11-23 CN CNU2007201710357U patent/CN201134686Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888102A (en) * | 2009-05-15 | 2010-11-17 | 福特全球技术公司 | Vehicle power system |
| CN101888102B (en) * | 2009-05-15 | 2015-09-16 | 福特全球技术公司 | Vehicle power system |
| CN104184315A (en) * | 2013-05-22 | 2014-12-03 | 海洋王（东莞）照明科技有限公司 | Power supply control circuit and power supply device |
| CN103647312A (en) * | 2013-12-01 | 2014-03-19 | 深圳市福田区青少年科技教育协会 | Safe and environment-friendly charger |
| CN104578308A (en) * | 2015-01-25 | 2015-04-29 | 浙江大学 | Parallel connection charging module for AUV wireless charging |
| CN104578356A (en) * | 2015-01-25 | 2015-04-29 | 浙江大学 | AUV parallel charging machine adjustable in charging voltage and charging current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hubei Yanguang Energy Technology Co.,Ltd. Assignor: Shenzhen Bak Battery Co., Ltd. Contract record no.: 2012440020090 Denomination of utility model: Charging device for lithium ion cell Granted publication date: 20081015 License type: Exclusive License Record date: 20120504 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081015 |