阅读说明：本技术 用于储能电站短板电芯的pack隔离电路及上下电方法 (PACK isolation circuit for short-board battery cell of energy storage power station and power-on and power-off method ) 是由 尚德华 王嘉兴 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种用于储能电站短板电芯的PACK隔离电路及上下电方法,包括电池PACK、高压箱、汇流母线A、汇流母线B、单刀双掷开关、触点、K总开关。本发明的有益效果是：可使得储能电站的短板电芯的PACK在不用断电的情况下,在线进行短板电芯PACK隔离和上下电,且不影响储能系统的运行工况；通过在现有的电池簇加入汇流母线和每个pack加上4个单刀双掷开关,从而在线进行短板电芯PACK隔离和上下电,且不影响储能系统的运行工况,可实现效果好,操作性强。(The invention discloses a PACK isolating circuit for a short-plate battery cell of an energy storage power station and a power-on and power-off method. The invention has the beneficial effects that: the PACK of the short-plate battery cell of the energy storage power station can be isolated and powered up and down on line under the condition of not cutting off the power supply, and the operation working condition of an energy storage system is not influenced; through adding busbar and every PACK at current battery cluster and adding 4 single-pole double-throw switches to carry out short-plate electric core PACK on line and keep apart and go up and down the electricity, and do not influence energy storage system's operating condition, can realize effectually, the strong operability.)

1. The utility model provides a PACK isolating circuit for energy storage power station short slab electricity core which characterized in that: comprises that

A plurality of battery PACKs (1) which are connected in series to form a battery cluster;

a high-voltage box (2) which is connected to a circuit formed by serially boosting a plurality of the batteries PACK (1);

one end of the bus bar is connected with the positive end of the high-voltage box (2), the other end of the bus bar is connected with the negative end of the high-voltage box (2) through a main switch (7), and the bus bar is provided with a bus bar A (3) and a bus bar B (4);

and the single-pole double-throw switch (5) is used for connecting a positive contact and a negative contact (6) of the battery PACK (1) and a contact (6) arranged on the bus bar to form a passage.

2. The PACK isolating circuit for the short-board cell of the energy storage power station as claimed in claim 1, characterized in that: every the positive negative pole of battery PACK (1) all is provided with two contacts (6), and connects through the wire between one of them anodal contact (6) and one negative pole contact (6).

3. The PACK isolating circuit for the short-board cell of the energy storage power station as claimed in claim 2, characterized in that: every battery PACK (1) is configured with four single-pole double-throw switches (5), and every two single-pole double-throw switches (5) constitute a switch group, and one of them switch group is connected between busbar A (3) and contact (6) of battery PACK (1) negative pole, and another switch group is connected between busbar B (4) and contact (6) of battery PACK (1) positive pole.

4. The PACK isolating circuit for the short-board cell of the energy storage power station as claimed in claim 1, characterized in that: the normal wiring mode of the circuit is as follows:

the total negative pole of the high-voltage box (2) is connected with a contact through a K total switch (7), a K1-1 switch of a PACK1 is connected with a contact of 1-1a, a K1-2 switch is connected with a contact of 1-2a, a K1-3 switch is connected with a contact of 1-3a, and a K1-4 switch is connected with a contact of 1-1 b;

then a K2-4 switch of the PACK2 is connected with a 2-4a contact, a K2-3 switch is connected with a 2-3a contact, a K2-2 switch is connected with a 2-2a contact, and a K2-1 switch is connected with a 2-1b contact;

then a K3-1 switch of the PACK3 is connected with a contact 3-1a, a K3-2 switch is connected with a contact 3-2a, a K3-3 switch is connected with a contact 3-3a, and a K3-4 switch is connected with a contact 3-4 b;

then a Kn-4 switch of the PACKn is connected with an n-4a contact, a Kn-3 switch is connected with an n-3a contact, a Kn-2 switch is connected with an n-2a contact, and a Kn-1 switch is connected with an n-1b contact and is connected with the total positive pole of the high-voltage box (2) through a bus bar.

5. The method for powering on and off the PACK isolating circuit used for the short-plate battery cell of the energy storage power station is characterized in that the method comprises the following steps: the power-on and power-off method comprises

When PACK1 is a short-plate battery cell

The total negative pole of a high-voltage box (3) is connected with a contact a through a K total switch (7), a K1-1 switch of a PACK1 is connected with a contact 1-1a, a K1-2 switch is connected with a contact 1-2b, a K1-3 switch is connected with a contact 1-3b, and a K1-4 switch is connected with a contact 1-1 b;

secondly, the single-pole double-throw switches (5) of the residual PCAK are kept unchanged as in the normal condition;

secondly, when PACK2 is a short plate battery cell

The total negative pole of the high-voltage box (3) is connected with a contact through a K total switch (7), and a single-pole double-throw switch (5) of a PACK1 is kept unchanged as in the normal condition;

circuit routing of PACK2 becomes: the K2-4 switch is connected with the 2-4a contact, the K2-3 switch is connected with the 2-3b contact, the K2-2 switch is connected with the 2-2b contact, and the K2-1 switch is connected with the 2-1b contact;

the single-pole double-throw switch (5) of the residual PCAK is kept unchanged as in the normal condition;

thirdly, when PACK3 is a short plate battery cell

The total negative pole of the high-voltage box (2) is connected with a contact through a K total switch (7), and single-pole double-throw switches (5) of PACK1 and PACK2 are kept unchanged as in the normal condition;

circuit routing of PACK2 becomes: the K3-1 switch is connected with a contact 3-1a, the K3-2 switch is connected with a contact 3-2b, the K3-3 switch is connected with a contact 1-3b, and the K1-4 switch is connected with a contact 1-1 b;

the single-pole double-throw switch (5) of the residual PCAK is kept unchanged as in the normal condition;

fourthly, when PACKn is a short plate cell core

The total negative pole of the high-voltage box (2) is connected with a contact through a K total switch (7), and a single-pole double-throw switch (5) from PACK1 to PACKn-1 is kept unchanged as in the normal condition;

circuit routing of PACKn becomes: the Kn-4 switch is connected with the 2-4a contact, the Kn-3 switch is connected with the n-3b contact, the Kn-2 switch is connected with the n-2b contact, and the Kn-1 switch is connected with the n-1b contact.

Technical Field

The invention relates to a PACK (Picture archiving and communication System) isolating circuit, in particular to a PACK isolating circuit and a power-on and power-off method for a short-board battery cell of an energy storage power station, and belongs to the technical field of power grid energy storage.

Background

For the existing power grid side energy storage system, the charging and discharging capacity of the whole system and the system safety are affected frequently because a certain or a plurality of PACKs in a battery cluster have short plate cells;

however, the existing technical scheme for processing the short plate battery cell has two disadvantages;

1. the influence of the short plate cell on the charging and discharging of the battery PACK is reduced simply by a software power reduction mode, but the short plate cell is not removed and replaced in the whole energy storage system;

2. add new electric core and replace original short slab electricity core after the PACK through dismantling short slab electricity core, but current method need with this short slab electricity core's whole battery cluster cut off the power supply just can, can influence energy storage system's operating mode like this, the operation that the system can not be just poor.

Disclosure of Invention

The invention aims to solve the problems and provide a PACK isolating circuit for a short-plate battery cell of an energy storage power station and a power-on and power-off method.

The invention realizes the purpose through the following technical scheme: a PACK isolating circuit for energy storage power station short slab electricity core, include

The battery PACK is provided with a plurality of batteries and is connected in series to form a battery cluster;

a high-voltage box connected to a circuit in which a plurality of the batteries PACK1 are serially boosted;

one end of the bus bar is connected with the positive end of the high-voltage box, the other end of the bus bar is connected with the negative end of the high-voltage box through a main switch, and the bus bar is provided with a bus bar A and a bus bar B;

and the single-pole double-throw switch is used for connecting positive and negative contacts of the battery PACK1 and contacts arranged on the bus bar to form a passage.

As a still further scheme of the invention: the positive pole and the negative pole of each battery PACK1 all are provided with two contacts, and are connected through the wire between one of them positive pole contact and one negative pole contact.

As a still further scheme of the invention: each of the batteries PACK1 is provided with four single-pole double-throw switches, and every two single-pole double-throw switches form a switch group, and one of the switch groups is connected between the bus bar a and the contact of the negative pole of the battery PACK1, and the other switch group is connected between the bus bar B and the contact of the positive pole of the battery PACK 1.

As a still further scheme of the invention: the normal wiring mode of the circuit is as follows:

the total negative pole of the high-voltage box is connected with a contact a through a K total switch, a K1-1 switch of a PACK1 is connected with a contact 1-1a, a K1-2 switch is connected with a contact 1-2a, a K1-3 switch is connected with a contact 1-3a, and a K1-4 switch is connected with a contact 1-1 b;

then a K2-4 switch of the PACK2 is connected with a 2-4a contact, a K2-3 switch is connected with a 2-3a contact, a K2-2 switch is connected with a 2-2a contact, and a K2-1 switch is connected with a 2-1b contact;

then a K3-1 switch of the PACK3 is connected with a contact 3-1a, a K3-2 switch is connected with a contact 3-2a, a K3-3 switch is connected with a contact 3-3a, and a K3-4 switch is connected with a contact 3-4 b;

then a Kn-4 switch of the PACKn is connected with an n-4a contact, a Kn-3 switch is connected with an n-3a contact, a Kn-2 switch is connected with an n-2a contact, and a Kn-1 switch is connected with an n-1b contact and is connected with the total positive pole of the high-voltage box through a bus bar.

A power-up and power-down method of a PACK isolation circuit for a short-plate battery cell of an energy storage power station comprises the following steps

When PACK1 is a short-plate battery cell

Firstly, the total negative pole of a high-voltage box is connected with a contact a through a K total switch, a K1-1 switch of a PACK1 is connected with a contact 1-1a, a K1-2 switch is connected with a contact 1-2b, a K1-3 switch is connected with a contact 1-3b, and a K1-4 switch is connected with a contact 1-1 b;

secondly, the single-pole double-throw switches of the rest PCAK are kept unchanged as in the normal condition;

secondly, when PACK2 is a short plate battery cell

The total negative pole of the high-voltage box is connected with a contact through a K total switch, and a single-pole double-throw switch of the PACK1 is kept unchanged as in the normal condition;

circuit routing of PACK2 becomes: the K2-4 switch is connected with the 2-4a contact, the K2-3 switch is connected with the 2-3b contact, the K2-2 switch is connected with the 2-2b contact, and the K2-1 switch is connected with the 2-1b contact;

the single-pole double-throw switch 5 of the residual PCAK is kept unchanged as in the normal condition;

thirdly, when PACK3 is a short plate battery cell

The total negative pole of the high-voltage box is connected with a contact through a K total switch, and the single-pole double-throw switches of the PACK1 and the PACK2 are kept unchanged as in the normal condition;

circuit routing of PACK2 becomes: the K3-1 switch is connected with a contact 3-1a, the K3-2 switch is connected with a contact 3-2b, the K3-3 switch is connected with a contact 1-3b, and the K1-4 switch is connected with a contact 1-1 b;

the single-pole double-throw switch 5 of the residual PCAK is kept unchanged as in the normal condition;

fourthly, when PACKn is a short plate cell core

The total negative pole of the high-voltage box is connected with a contact through a K total switch, and the single-pole double-throw switches from PACK1 to PACKn-1 are kept unchanged as in the normal condition;

circuit routing of PACKn becomes: the Kn-4 switch is connected with the 2-4a contact, the Kn-3 switch is connected with the n-3b contact, the Kn-2 switch is connected with the n-2b contact, and the Kn-1 switch is connected with the n-1b contact.

The invention has the beneficial effects that:

1. the PACK of the short-plate battery cell of the energy storage power station can be isolated and powered up and down on line under the condition of not cutting off the power supply, and the operation working condition of an energy storage system is not influenced;

2. through adding busbar and every PACK at current battery cluster and adding 4 single-pole double-throw switches to carry out short-plate electric core PACK on line and keep apart and go up and down the electricity, and do not influence energy storage system's operating condition, can realize effectually, the strong operability.

Drawings

FIG. 1 is a schematic circuit flow diagram of the present invention.

In the figure: 1. battery PACK, 2, high-voltage box, 3, busbar A, 4, busbar B, 5, single-pole double-throw switch, 6, contact and 7, K master switch.

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.

Example one

Referring to fig. 1, a PACK isolation circuit for a short board cell of an energy storage power station includes

A plurality of battery PACKs 1, which are connected in series to form a battery cluster;

a high-voltage box 2 connected to a circuit in which a plurality of the batteries PACK1 are serially boosted;

a bus bar having one end connected to the positive end of the high-voltage box 2 and the other end connected to the negative end of the high-voltage box 2 via a main switch 7, and including a bus bar a3 and a bus bar B4;

and the single-pole double-throw switch 5 is used for connecting the positive and negative contacts 6 of the battery PACK1 and the contacts 6 arranged on the bus bar to form a passage.

In the embodiment of the invention, two contacts 6 are arranged on the positive electrode and the negative electrode of each battery PACK1, and one positive electrode contact 6 is connected with one negative electrode contact 6 through a conducting wire.

In the embodiment of the invention, each battery PACK1 is provided with four single-pole double-throw switches 5, every two single-pole double-throw switches 5 form a switch group, one switch group is connected between the bus bar A3 and the contact 6 of the negative pole of the battery PACK1, and the other switch group is connected between the bus bar B4 and the contact 6 of the positive pole of the battery PACK 1.

In the embodiment of the invention, the normal wiring mode of the circuit is as follows:

the total negative pole of the high-voltage box 2 is connected with a contact a through a K total switch 7, a K1-1 switch of a PACK1 is connected with a contact 1-1a, a K1-2 switch is connected with a contact 1-2a, a K1-3 switch is connected with a contact 1-3a, and a K1-4 switch is connected with a contact 1-1 b;

then a K2-4 switch of the PACK2 is connected with a 2-4a contact, a K2-3 switch is connected with a 2-3a contact, a K2-2 switch is connected with a 2-2a contact, and a K2-1 switch is connected with a 2-1b contact;

then a K3-1 switch of the PACK3 is connected with a contact 3-1a, a K3-2 switch is connected with a contact 3-2a, a K3-3 switch is connected with a contact 3-3a, and a K3-4 switch is connected with a contact 3-4 b;

then a Kn-4 switch of the PACKn is connected with an n-4a contact, a Kn-3 switch is connected with an n-3a contact, a Kn-2 switch is connected with an n-2a contact, and a Kn-1 switch is connected with an n-1b contact and is connected with the total positive pole of the high-voltage box 2 through a bus bar.

Example two

Referring to fig. 1, a power-up and power-down method of a PACK isolation circuit for a short-board cell of an energy storage power station includes

When PACK1 is a short-plate battery cell

Firstly, the total negative pole of a high-voltage box 3 is connected with a contact a through a K total switch 7, a K1-1 switch of a PACK1 is connected with a contact 1-1a, a K1-2 switch is connected with a contact 1-2b, a K1-3 switch is connected with a contact 1-3b, and a K1-4 switch is connected with a contact 1-1 b;

secondly, the remaining PCAK single-pole double-throw switches 5 are kept unchanged as in the normal case;

secondly, when PACK2 is a short plate battery cell

The total negative pole of the high-voltage box 3 is connected with a contact through a K total switch 7, and a single-pole double-throw switch 5 of the PACK1 is kept unchanged as in the normal condition;

circuit routing of PACK2 becomes: the K2-4 switch is connected with the 2-4a contact, the K2-3 switch is connected with the 2-3b contact, the K2-2 switch is connected with the 2-2b contact, and the K2-1 switch is connected with the 2-1b contact;

the single-pole double-throw switch 5 of the residual PCAK is kept unchanged as in the normal condition;

thirdly, when PACK3 is a short plate battery cell

The total negative pole of the high-voltage box 2 is connected with a contact through a K total switch 7, and the single-pole double-throw switches 5 of the PACK1 and the PACK2 are kept unchanged as in the normal condition;

circuit routing of PACK2 becomes: the K3-1 switch is connected with a contact 3-1a, the K3-2 switch is connected with a contact 3-2b, the K3-3 switch is connected with a contact 1-3b, and the K1-4 switch is connected with a contact 1-1 b;

the single-pole double-throw switch 5 of the residual PCAK is kept unchanged as in the normal condition;

fourthly, when PACKn is a short plate cell core

The total negative pole of the high-voltage box 2 is connected with a contact through a K total switch 7, and the single-pole double-throw switches 5 from PACK1 to PACKn-1 are kept unchanged as in the normal condition;

circuit routing of PACKn becomes: the Kn-4 switch is connected with the 2-4a contact, the Kn-3 switch is connected with the n-3b contact, the Kn-2 switch is connected with the n-2b contact, and the Kn-1 switch is connected with the n-1b contact.

The working principle is as follows: when the energy storage system is in operation, when the host computer finds that the short plate cell affects the charging and discharging performance of the system, the PACK address of the short plate cell and the short plate cell address of the PACK address are displayed by the host computer; the PACK isolation and the power on and power off of the short-plate battery cell without power off are realized by manually switching the single-pole double-throw switch.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.