CN213461195U - Quick charging circuit system of low-voltage battery pack for charging pile by using direct current - Google Patents
Quick charging circuit system of low-voltage battery pack for charging pile by using direct current Download PDFInfo
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- CN213461195U CN213461195U CN202022651914.8U CN202022651914U CN213461195U CN 213461195 U CN213461195 U CN 213461195U CN 202022651914 U CN202022651914 U CN 202022651914U CN 213461195 U CN213461195 U CN 213461195U
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a low-voltage battery group utilizes direct current to fill electric pile's quick charge circuit system, including treating rechargeable battery group BAT1, treat rechargeable battery group BAT1 and correspond and be equipped with supplementary quick charge circuit, supplementary quick charge circuit with treat rechargeable battery group BAT1 parallelly connected, supplementary quick charge circuit includes branch road one, branch road two and branch road three, branch road one includes contactor K1, contactor K1 sets up between first and the direct current of link fills electric pile, branch road two includes contactor K4, K4 sets up between the electric pile is filled to link four and direct current, branch road three includes contactor K6, contactor K6 one end connection link two, the other end connection link three. The utility model discloses can satisfy the normal charge-discharge mode of new energy automobile battery, can fill fast under many times voltage again, and this method circuit is succinct, and available same method continues to increase parallel circuit to the direct current that adapts to bigger voltage class fills electric pile.
Description
Technical Field
The utility model belongs to new energy automobile battery system field especially relates to a low voltage battery group utilizes direct current to fill electric pile's quick charge circuit system.
Background
At present, widely using in A00 level new energy automobile battery package charges as well-known, because the voltage of battery package is less, so generally adopt the mode that the alternating current charges slowly to charge for the battery package, consuming time overlength, nevertheless because battery package voltage is lower itself, if directly use high voltage direct current to fill electric pile when filling soon, power through electric core is too big, leads to electric core in the battery package to be burnt out, the explosion takes place when serious.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a low voltage battery group utilizes direct current to fill electric pile's quick charge circuit system to solve the problem of battery package charge time overlength.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a quick charging circuit system of a low-voltage battery pack by using a direct current charging pile comprises a battery pack to be charged BAT1 and a battery pack to be charged BAT2 connected in parallel with the battery pack to be charged BAT1, the battery pack to be charged BAT1 comprises a first connecting end and a second connecting end, the first connecting end and the second connecting end are respectively connected with a charging and discharging end at the same port, the battery pack to be charged BAT2 comprises a third connecting end and a fourth connecting end, an auxiliary quick charging circuit is correspondingly arranged on the battery pack to be charged BAT1, the auxiliary quick charging circuit is connected in parallel with the battery pack to be charged BAT1, the auxiliary quick charging circuit comprises a first branch, a second branch and a third branch, the first branch comprises a contactor K1, the contactor K1 is arranged between the first connecting end and the direct current charging pile, the second branch comprises a contactor K4, the K4 is arranged between the fourth connecting end and the direct current charging pile, the third branch comprises a contactor K6, one end of the contactor K6 is, the other end is connected with a third connecting end.
Further, supplementary fill circuit soon still includes contactor K5 and contactor K7, link one is connected to contactor K5's one end, and the other end is connected link three, link two is connected to contactor K7's one end, and the other end is connected link four.
Further, the first branch is also provided with a fuse FU2 and a current sensor L2 in series.
Further, the branch three also comprises a fuse FU3, and the fuse FU3 is connected with the contactor K6 in series.
Further, treat that battery group BAT1 still corresponds and be connected with mouthful charge-discharge circuit with treating that battery group BAT1 establishes ties, with mouthful charge-discharge circuit including branch road four and branch road five, branch road four includes contactor K2, contactor K2 is connected between the connection end one and the mouthful charge-discharge end of treating battery group BAT1, branch road five includes contactor K3, contactor K3 connects between the connection end two and the mouthful charge-discharge end of treating battery group BAT 1.
Further, a fuse FU1 and a current sensor L1 are arranged in series on the branch IV.
Furthermore, the number of the auxiliary quick charging circuits is more than 1.
Compared with the prior art, a low voltage battery group utilize direct current to fill electric pile's quick charge circuit system have following advantage:
(1) the low-voltage battery pack can meet the charging and discharging mode of a general new energy automobile battery by using the quick charging circuit system of the direct current charging pile, can carry out quick charging under multiple voltages, has simple circuits, and can continuously increase parallel circuits by using the same method, thereby being suitable for the direct current charging pile with larger voltage class;
(2) the quick charging circuit system of the low-voltage battery pack utilizing the direct current charging pile can realize the charging and discharging of the battery by controlling the switches of different contactors, and can control the voltage when the battery supplies power to the outside and the connection mode of the circuit, thereby changing and increasing the voltage grade during charging, and being suitable for the quick charging of different voltage grades;
(3) a low voltage battery group utilize direct current to fill electric pile's quick charge circuit system can guarantee the circuit safety of battery when charging and discharging, guarantee can not produce when filling soon and lead to the circuit to burn out the scheduling problem because of voltage is too big.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a circuit diagram of a fast charging circuit system of a low-voltage battery pack using a dc charging pile according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, a fast charging circuit system for a low-voltage battery pack using a dc charging pile includes a battery group to be charged BAT1 and a battery group to be charged BAT2 connected in parallel with the battery group to be charged BAT1, the battery group to be charged BAT1 includes a first connection terminal and a second connection terminal, the first connection terminal and the second connection terminal are respectively connected to a charging/discharging terminal at the same port, the battery group to be charged BAT2 includes a third connection terminal and a fourth connection terminal, an auxiliary fast charging circuit is correspondingly provided to the battery group to be charged BAT1, the auxiliary fast charging circuit is connected in parallel with the battery group to be charged 1, the auxiliary fast charging circuit includes a first branch, a second branch and a third branch, the first branch includes a contactor K1, the contactor K1 is provided between the first connection terminal and the dc charging pile, the second branch includes a contactor K4, the K4 is provided between the fourth connection terminal and the dc charging pile, the third branch includes a contactor K6, one end of the contactor K6 is connected to the charging pile at the second connection terminal, the other end is connected with a third connecting end.
Supplementary fill circuit soon still includes contactor K5 and contactor K7, first, the other end connection end is three to the one end connection end of contactor K5, second, the other end connection end is four to the one end connection end of contactor K7.
The first branch is also provided with a fuse FU2 and a current sensor L2 in series.
The third branch circuit further comprises a fuse FU3, and the fuse FU3 is connected with a contactor K6 in series.
The battery pack BAT1 waiting to charge is also correspondingly connected with a same-port charging and discharging circuit, the same-port charging and discharging circuit is connected with the battery pack BAT1 waiting to charge in series, the same-port charging and discharging circuit comprises a branch four and a branch five, the branch four comprises a contactor K2, the contactor K2 is connected between a first connecting end and a same-port charging and discharging end of the battery pack BAT1 waiting to charge, the branch five comprises a contactor K3, and the contactor K3 is connected between a second connecting end and a same-port charging and discharging end of the battery pack BAT1 waiting to charge.
And a fuse FU1 and a current sensor L1 are further arranged on the fourth branch in series.
The quantity of supplementary fast charging circuit is more than 1, and this scheme only uses an supplementary fast charging circuit as an example, is provided with a plurality of groups of batteries in the battery package, when needing the direct current of bigger voltage class to fill electric pile soon, only need according to the quantity increase corresponding supplementary fast charging circuit of group of batteries can.
When the scheme is implemented, the method has the advantages that,
(1) when a battery pack to be charged BAT1 and a battery pack to be charged BAT2 are rapidly charged by using a direct current charging pile, a contactor K2 and a contactor K3 are in an off state, a contactor K1 and a contactor K4 which are connected with a charging interface are closed, a contactor K5 and a contactor K7 are opened at the moment, a contactor K6 is closed, a battery pack to be charged BAT1 and a battery pack to be charged BAT2 in a circuit are in a series state at the moment, the voltage in the circuit is U1+ U2 at the moment, a current sensor A2 is used for monitoring real-time current during charging, a fuse FU3 prevents the battery pack short circuit caused when the contactor K5, the contactor K7 and the contactor K6 are closed simultaneously, the voltage level of charging of the battery pack to be charged BAT1 and the battery pack to be charged 2 can reach the sum of the voltage U1 of the battery pack to be charged BAT1 and the voltage U2 of the battery pack to be charged 2, and rapid charging can;
(2) when the to-be-charged battery pack BAT1 and the to-be-charged battery pack BAT2 are normally charged by the direct-current charging pile, only the contactor K2, the contactor K3 and the contactor K6 need to be disconnected, the other contactors are closed, the to-be-charged battery pack BAT1 and the to-be-charged battery pack BAT2 are connected in parallel, and the circuit can be charged at a single voltage level;
(3) when the charging is carried out by using the same-port charging and discharging circuit, the contactor K2 and the contactor K3 are ensured to be kept in a closed state, at the moment, when the contactor K5 and the contactor K7 are closed simultaneously and the contactor K6 is opened, the battery group to be charged BAT1 and the battery group to be charged BAT2 in the circuit are in a parallel state, and at the moment, the circuit is charged under a single-voltage level;
(4) when the same-port charging and discharging circuit is used for discharging, the contactor K2 and the contactor K3 are ensured to be kept in a closed state, at the moment, when the contactor K5 and the contactor K7 are closed simultaneously and the contactor K6 is opened, the battery group to be charged BAT1 and the battery group to be charged BAT2 in the circuit are in a parallel connection state, larger current can be provided outwards, real-time current can be measured through the current sensor L1, and the fuse FU1 serves as circuit protection at the moment.
In the design logic of the contactor switch, when the circuit is in an external power supply state, the voltage balance needs to be controlled, so that the voltage on each branch is basically the same, and the condition that the voltage of a single branch is too large or too small is prevented; when the circuit is in a charging state, it is ensured that the contact K7 and the contact K6 or the contact K5 and the contact K6 cannot be closed at the same time, which would otherwise cause the corresponding battery to be short-circuited, burning out the battery.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a low-voltage battery utilizes direct current to fill electric pile's quick charge circuit system, includes treats rechargeable battery group BAT1 and treats rechargeable battery group BAT2 with treating rechargeable battery group BAT1 parallel connection, treat rechargeable battery group BAT1 and include link one and link two, link one and link two are connected respectively with the same mouthful charge-discharge end, treat rechargeable battery group BAT2 and include link three and link four, its characterized in that: treat that rechargeable battery group BAT1 corresponds and be equipped with supplementary quick charging circuit, supplementary quick charging circuit with treat rechargeable battery group BAT1 parallelly connected, supplementary quick charging circuit includes branch road one, branch road two and branch road three, branch road one includes contactor K1, contactor K1 sets up between the electric pile is filled to link one and direct current, branch road two includes contactor K4, K4 sets up between the electric pile is filled to link four and direct current, branch road three includes contactor K6, link two is connected to contactor K6 one end, link three is connected to the other end.
2. The rapid charging circuit system of a low-voltage battery pack using a dc charging post according to claim 1, wherein: supplementary fill circuit soon still includes contactor K5 and contactor K7, first, the other end connection end is three to the one end connection end of contactor K5, second, the other end connection end is four to the one end connection end of contactor K7.
3. The rapid charging circuit system of a low-voltage battery pack using a dc charging post according to claim 1, wherein: the first branch is also provided with a fuse FU2 and a current sensor L2 in series.
4. The rapid charging circuit system of a low-voltage battery pack using a dc charging post according to claim 1, wherein: the third branch circuit further comprises a fuse FU3, and the fuse FU3 is connected with a contactor K6 in series.
5. The rapid charging circuit system of a low-voltage battery pack using a dc charging post according to claim 1, wherein: the battery pack BAT1 waiting to charge is also correspondingly connected with a same-port charging and discharging circuit, the same-port charging and discharging circuit is connected with the battery pack BAT1 waiting to charge in series, the same-port charging and discharging circuit comprises a branch four and a branch five, the branch four comprises a contactor K2, the contactor K2 is connected between a first connecting end and a same-port charging and discharging end of the battery pack BAT1 waiting to charge, the branch five comprises a contactor K3, and the contactor K3 is connected between a second connecting end and a same-port charging and discharging end of the battery pack BAT1 waiting to charge.
6. The rapid charging circuit system of a low-voltage battery pack using a dc charging post according to claim 5, wherein: and a fuse FU1 and a current sensor L1 are further arranged on the fourth branch in series.
7. The rapid charging circuit system of a low-voltage battery pack using a dc charging post according to claim 1, wherein: the number of the auxiliary quick charging circuits is more than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022651914.8U CN213461195U (en) | 2020-11-16 | 2020-11-16 | Quick charging circuit system of low-voltage battery pack for charging pile by using direct current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022651914.8U CN213461195U (en) | 2020-11-16 | 2020-11-16 | Quick charging circuit system of low-voltage battery pack for charging pile by using direct current |
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| CN213461195U true CN213461195U (en) | 2021-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383108A (en) * | 2020-11-16 | 2021-02-19 | 上海卓迅汽车科技有限公司 | Quick charging circuit system of low-voltage battery pack for charging pile by using direct current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383108A (en) * | 2020-11-16 | 2021-02-19 | 上海卓迅汽车科技有限公司 | Quick charging circuit system of low-voltage battery pack for charging pile by using direct current |
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