CN109193881A - Battery pack and fast charge method with quick-charge function - Google Patents
Battery pack and fast charge method with quick-charge function Download PDFInfo
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- CN109193881A CN109193881A CN201811404089.2A CN201811404089A CN109193881A CN 109193881 A CN109193881 A CN 109193881A CN 201811404089 A CN201811404089 A CN 201811404089A CN 109193881 A CN109193881 A CN 109193881A
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- Prior art keywords
- battery
- charging
- battery pack
- relay
- charge
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Power Engineering (AREA)
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Abstract
本发明涉及电池包快速充电装置技术领域，尤其涉及一种带有快速充电功能的电池包及快速充电方法；包括多个电池单元以及用于将各所述电池单元进行并联的多个放电继电器、用于将各所述电池单元进行串联的多个充电继电器。本发明所公开的带有快速充电功能的电池包及快速充电方法，通过设置充电继电器和放电继电器，实现电池包在并联的情况下放电，在串联的情况下充电，使得充电的电压得以提升，能够成倍提高充电时间，达到快速充电的目的，提升充电速度，不增加发热量，不增加热损耗；同时，在充电功率不变的情况下，提升电压能够降低电流，减少热量损耗；进一步地，无需复杂电子设备的投入，降低了电池包的使用成本。
The present invention relates to the technical field of fast charging devices for battery packs, in particular to a battery pack with a fast charging function and a fast charging method; comprising a plurality of battery cells and a plurality of discharge relays for connecting the battery cells in parallel, A plurality of charging relays for connecting the battery cells in series. The battery pack with the fast charging function and the fast charging method disclosed by the invention, by setting the charging relay and the discharging relay, realize the discharging of the battery pack in the case of parallel connection, and the charging in the case of connecting in series, so that the charging voltage can be improved, It can double the charging time, achieve the purpose of fast charging, increase the charging speed, do not increase the heat generation, and do not increase the heat loss; at the same time, under the condition of the same charging power, increasing the voltage can reduce the current and reduce the heat loss; further , without the investment of complex electronic equipment, reducing the cost of using the battery pack.
Description
Technical field
The present invention relates to battery pack quick charge device technical field more particularly to a kind of electricity with quick-charge function
Chi Bao and fast charge method.
Background technique
Recent years, pure electric automobile have obtained significant progress, in the whole nation and worldwide, every country and enterprise
Industry is all greatly developing implementation pure electric automobile.And battery pack is as the power exporting machine structure on pure electric automobile, important work
With being also self-evident.
Electric car wants long continual mileage, it is necessary to which battery pack has big electricity, but electricity increases, corresponding to charge
Time will extend, and the longer charging time is that people are intolerable；By the battery (lithium titanate for buying quickly-chargeable
Battery) fast charge may be implemented, but such battery is at high cost, energy density is low, lacks popularization；Want quick charge, Jiu Huixu
Larger current is wanted, larger current can directly result in the raising of thermal losses, and it is lower so as to cause the charge efficiency of battery pack, while companion
It with the reduction of safety, or even can explode, endanger personal safety.
To sum up, the quick charge capability of battery pack how is solved, thermal losses is reduced, while improving charge efficiency, is pure electricity
Electrical automobile realizes long continual mileage, comes into the important breakthrough point of huge numbers of families.
Therefore, to solve the above-mentioned problems, it is badly in need of inventing a kind of new battery pack with quick-charge function and quick
Charging method.
Summary of the invention
It is an object of the invention to: a kind of battery pack and fast charge method with quick-charge function is provided, is passed through
To the arrangement of mould group and the design of connection structure, is not changing battery core performance and safely and effectively under mode, promoting charging at double
Rate.
The present invention provides following proposals:
A kind of battery pack with quick-charge function, including multiple battery units, each battery unit include more
A concatenated battery core；The both ends of each battery unit are all connected to electric discharge relay；The head of the two neighboring battery unit
Tail joint is connected by charge relay；The electric discharge relay and the charge relay connect with battery manager
It connects, for controlling the on-off of the electric discharge relay and the charge relay.
Preferably, the battery pack with quick-charge function further includes overload protective device, the overload protective device
It is series at the end to end place of the two neighboring battery unit.
Preferably, the overload protective device is also series at the end to end place of two electric discharge relays.
Preferably, the overload protective device is connect with the charge relay by copper cable.
Preferably, each battery core is electrically connected by conducting copper.
Preferably, each electric discharge relay and each charge relay pass through copper cable respectively and the battery core connects
It connects.
Preferably, the battery pack with quick-charge function further includes electric discharge output end, the electric discharge output end
It is connected to the both ends of each battery unit.
Preferably, the battery pack with quick-charge function further includes charging input end, the charging input end
Head end and end after being connected to all battery cells in series.
Preferably, the battery core is ternary lithium cell, any in LiFePO4 battery core.
Further, the present invention also provides a kind of battery packs of the battery pack with quick-charge function described in realize
Fast charge method, in discharge condition, each electric discharge relay is closed, and each charge relay disconnects, each institute
It is in parallel to state battery unit, for externally exporting electric energy；In charged state, each charge relay is closed, each described
Electric discharge relay disconnects, and each battery unit head and the tail are sequentially connected in series, for charging to each battery unit.
It is that the present invention generates the utility model has the advantages that
Battery pack disclosed in this invention with quick-charge function, including multiple battery units and for by each institute
It states battery unit and carries out multiple electric discharge relays in parallel, for each battery unit to be carried out concatenated multiple charging relays
Device；The first end for two battery units being disposed adjacent is electrically connected with the both ends of an electric discharge relay respectively, phase
The second end of two battery units of neighbour's setting is electrically connected with the both ends for the relay that discharges described in another respectively；It is adjacent to set
The first end for the battery unit in two battery units set and the second end of another battery unit
Between connect a charge relay；Each electric discharge relay and each charge relay respectively with battery manager
Electrical connection；By setting charge relay and electric discharge relay, realize that battery pack is discharged in the case where parallel connection, in concatenated feelings
It charges under condition, so that the voltage of charging is promoted, the charging time can be significantly improved, achieve the purpose that quick charge, i.e., not
Charging rate is promoted to increase the condition of electric current, does not increase calorific value, does not increase thermal losses；Meanwhile it is constant in charge power
In the case where, promoting voltage can reduce electric current, reduce thermal losses；Further, boosting fast charge is realized using physical structure,
It is of simple structure and low cost, without the investment of complex electronic equipment, reduce the use cost of battery pack.
Detailed description of the invention
Fig. 1 is the structural block diagram of the battery pack with quick-charge function of the invention；
Fig. 2 is the structural block diagram (discharge condition) of the battery pack with quick-charge function of the invention；
Fig. 3 is the structural block diagram (charged state) of the battery pack with quick-charge function of the invention；
Fig. 4 is the structural block diagram (band overload protective device) of the battery pack with quick-charge function of the invention；
Fig. 5 is the flow diagram of battery pack fast charge method of the invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a 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 every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Referring to FIG. 1 to FIG. 4, a kind of battery pack with quick-charge function, including multiple battery units and use
It is concatenated multiple in each battery unit is carried out multiple electric discharge relays in parallel, is used to carry out each battery unit
Charge relay；The first end for two battery units being disposed adjacent is electric with the both ends of an electric discharge relay respectively
Connection, both ends of the second end for two battery units being disposed adjacent respectively with the relay that discharges described in another are electrically connected
It connects；The first end and another described battery unit for the battery unit in two battery units being disposed adjacent
Second end between connect a charge relay；Each electric discharge relay and each charge relay respectively with electricity
Pool manager electrical connection.The battery unit includes multiple concatenated battery cores.Each battery core is electrically connected by conducting copper.Respectively
The electric discharge relay and each charge relay pass through copper cable respectively and are electrically connected with the battery core.Battery core is ternary lithium electricity
Core.
Have the battery pack of quick-charge function described in the present embodiment, including multiple battery units and for by each institute
It states battery unit and carries out multiple electric discharge relays in parallel, for each battery unit to be carried out concatenated multiple charging relays
Device；The first end for two battery units being disposed adjacent is electrically connected with the both ends of an electric discharge relay respectively, phase
The second end of two battery units of neighbour's setting is electrically connected with the both ends for the relay that discharges described in another respectively；It is adjacent to set
The first end for the battery unit in two battery units set and the second end of another battery unit
Between connect a charge relay；Each electric discharge relay and each charge relay respectively with battery manager
Electrical connection；By setting charge relay and electric discharge relay, realize that battery pack is discharged in the case where parallel connection, in concatenated feelings
It charges under condition, so that the voltage of charging is promoted, the charging time can be significantly improved, achieve the purpose that quick charge, i.e., not
Charging rate is promoted to increase the condition of electric current, does not increase calorific value, does not increase thermal losses；Meanwhile it is constant in charge power
In the case where, promoting voltage can reduce electric current, reduce thermal losses；Further, boosting fast charge is realized using physical structure,
It is of simple structure and low cost, without the investment of complex electronic equipment, reduce the use cost of battery pack.
It is shown in Figure 5, the battery pack that quick-charge function is had described in a kind of realize is additionally provided in the present embodiment
Battery pack fast charge method, in discharge condition, each electric discharge relay is closed, and each charge relay is disconnected
It opens, each battery unit is in parallel, for externally exporting electric energy；In charged state, each charge relay is closed,
Each electric discharge relay disconnects, and each battery unit head and the tail are sequentially connected in series, for filling to each battery unit
Electricity.
The principle of battery pack described in the present embodiment with quick-charge function are as follows: battery pack two when being charged by being promoted
Voltage is held, achievees the purpose that realize battery pack fast charge.When battery pack carries out charge and discharge, there are general power a W, W=U × I both electric
Pressure is multiplied by electric current.The gross energy of battery pack is E, and energy is equal to power multiplied by time, E=W × t=U × I × t.It is total in battery pack
In the case that energy is constant, if voltage is able to ascend 3 times, the charging time can shorten to 1/3, E=3U × I × t/3, this
When the function of fast charge is realized for battery pack.(3 times are only illustrated, and are not limited to 3 times, 2 times, 4 times are ok).Battery conduct
Chemical energy source, in use, charging/discharging voltage can not arbitrarily change, so needing to realize more piece string by physical structure
Voltage in parallel process changes.Mechanism is provided as the energy in system simultaneously, the discharge voltage of battery pack generally has strictly
It is required that (e.g., general plug-in mixes its voltage of electrical automobile and requires to be 48V, pure electric vehicle riding parking stall 350V, pure electric coach 650V).
The battery pack that quick-charge function is had described in the present embodiment, gives one example, and illustrates how the present invention is implemented.
Realize the fast charge function, need basic module: total cable, relay is several, and battery is several, conducting copper.Total positive/negative cable
Effect is, will it is series-parallel after battery pack power export；Battery is the basic unit for forming battery pack；Copper bar is series connection two
The conductive component of batteries；Relay is the switch for controlling high tension loop on-off, and relay both ends are connected with copper cable with battery.
Specifically include 1 pair it is total just, total negative wire cable, 9 economize on electricity cores, 4 relays, 6 copper bars.The nominal parameter of battery core is 3V, 3Ah.?
When state of discharging, 9 economize on electricity cores are divided into 3 groups, organize interior parallel connection, connect between group, then the battery core packet is 3P3S (3 and 3 string), are discharging
Under state P1, electric discharge relay closure composition access, charge relay is disconnected.The parameter of battery core packet is 9V, 9Ah at this time, herein
Need 1h that could be full of (81Wh=9V × 9A × 1h) with rated current charging under state.When charged state P2, electric discharge
Relay disconnects, charge relay closure composition access, at this time the 9 economize on electricity all series connections of core, then the battery core packet is changed into
1P9S (1 and 9 string), the parameter of battery core packet is that 27V, 3Ah only need 1/3h i.e. at this time in the case where charging current is constant at this time
Achievable charging (81Wh=27V × 9A × 1h/3).It is designed by such structure, realizes and do not promoting battery core packet discharge voltage
In the case where platform, only the promotion voltage of integral multiple while charging, completes the operation of fast charge.
The battery core packet that quick-charge function is had described in the present embodiment, in the case where the general power that charges is constant, this hair
The bright thermal losses that can be reduced in charging process promotes efficiency for charge-discharge.Include 1 pair it is total just, total negative wire cable, 9 batteries, 4
A relay, 6 copper bars.The nominal parameter of battery is 3V, 3Ah.When state P1,9 batteries are divided into 3 groups, and group is interior simultaneously
Join, connect between group, then the battery pack is 3P3S (3 and 3 string), and electric discharge relay closure forms access, and charge relay disconnects.This
When battery pack parameter be 9V, 9Ah, can be fully charged (81Wh=9V × 9A × 1h) using 9A electric current 1h.State P2 when
It waits, electric discharge relay disconnects, charge relay closure composition access, at this time all series connections of 9 batteries, then the battery pack
It is changed into 1P9S, the parameter of battery pack is that 27V, 3Ah only need 3A complete at this time in the case where charge power is constant at this time
At charging (81Wh=27V × 3A × 1h).Compare the thermal losses under P1 and P2 state, Q1=I1 2Rt=92Rt=81rt Q2=
I2 2Rt=32Rt=9rt Q2=1/9Q1, thermal losses is 1/9 under P1 state under P2 state, reduces calorific value, improves
Charge and discharge efficiency (with from the point of view of this example as battery pack total system efficiency for charge-discharge be 98%, after high-voltage charging system, charge and discharge
98.88%) electrical efficiency will be promoted to.
The battery core packet that quick-charge function is had described in the present embodiment, is suitable for various battery cores, without special using fast
Charge core, is adapted to existing procucts currently on the market (ternary lithium, LiFePO4 battery core etc.) good；By promoting charging voltage,
Fast charge time, significant effect can be significantly improved；Charging rate is not promoted to increase the condition of electric current, does not increase calorific value,
Do not increase thermal losses；In the case where charge power is constant, electric current can be reduced by promoting voltage, it is possible to reduce thermal losses (Q=
I2Rt I declines so that Q declines)；Boosting fast charge is realized using physical structure, it is of simple structure and low cost, it is not necessarily to sophisticated electronic
The investment of equipment.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811404089.2A CN109193881A (en) | 2018-11-23 | 2018-11-23 | Battery pack and fast charge method with quick-charge function |
| PCT/CN2018/123075 WO2020103273A1 (en) | 2018-11-23 | 2018-12-24 | Battery pack having quick charging function and quick charging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811404089.2A CN109193881A (en) | 2018-11-23 | 2018-11-23 | Battery pack and fast charge method with quick-charge function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109193881A true CN109193881A (en) | 2019-01-11 |
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ID=64938249
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811404089.2A Pending CN109193881A (en) | 2018-11-23 | 2018-11-23 | Battery pack and fast charge method with quick-charge function |
Country Status (2)
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|---|---|
| CN (1) | CN109193881A (en) |
| WO (1) | WO2020103273A1 (en) |
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| CN110562095A (en) * | 2019-08-14 | 2019-12-13 | 珠海凯邦电机制造有限公司 | Electric automobile, battery voltage regulating circuit and method |
| CN114290957A (en) * | 2021-12-30 | 2022-04-08 | 上海洛轲智能科技有限公司 | Control method and device for switching off quick charge relay and electronic equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020103273A1 (en) | 2020-05-28 |
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Application publication date: 20190111 |
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