KR20170051056A

KR20170051056A - Detection voltage circuit device for battery pack

Info

Publication number: KR20170051056A
Application number: KR1020150153393A
Authority: KR
Inventors: 성종규; 윤석진
Original assignee: 주식회사 엘지화학
Priority date: 2015-11-02
Filing date: 2015-11-02
Publication date: 2017-05-11
Also published as: KR102025284B1

Abstract

The present invention provides a battery pack voltage detection circuit device for detecting a voltage value from a battery pack including at least one group bank composed of two or more unit banks, A dividing circuit that generates a summed voltage value by summing the voltage values received and generates a step-down voltage value by decreasing the summed voltage value; And an AFE for receiving the step-down voltage value generated in the dividing circuit through an input port corresponding one-to-one to the at least one group bank; A battery pack voltage detection circuit device is disclosed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery pack voltage detection circuit device,

The present invention relates to a battery pack voltage detection circuit device, and more particularly, to a battery pack voltage detection circuit device capable of detecting a voltage of a plurality of unit banks constituting a battery pack, Circuit device.

Recently, research and development on secondary batteries have been actively conducted. Here, the secondary battery is a battery that can be charged and discharged, and includes both conventional Ni / Cd batteries, Ni / MH batteries, and the recent lithium ion batteries. Among the secondary batteries, the lithium ion battery has a merit that the energy density is much higher than that of the conventional Ni / Cd battery and the Ni / MH battery. Moreover, the lithium ion battery can be manufactured in a small size and tendency, . In addition, the lithium ion battery has been attracting attention as a next generation energy storage medium by expanding its use range as an electric vehicle power source.

A battery pack voltage detection circuit device included in a conventional battery protection circuit device includes at least an input port having an input port corresponding to the number of unit banks for detecting a voltage of each unit bank from a battery pack constituted by a series connection of a plurality of unit banks One AFE had to be prepared. That is, as the number of unit banks constituting the battery pack increases, the number of AFEs must also increase. This increased the production cost of the battery protection circuit device and contributed to the increase in power consumption in the system.

Therefore, it is required to develop a battery pack voltage detecting circuit device capable of coping with the minimum number of AFEs even when the number of the plurality of unit banks constituting the battery pack increases.

KR 10-2011-0054681 A

The present invention provides a battery pack voltage detection circuit device capable of reducing the number of AFEs that increase in proportion to the number of unit banks constituting a battery pack.

The present invention provides a battery pack voltage detection circuit device capable of reducing consumed power that increases in accordance with the number of AFEs that increase in proportion to the number of unit banks constituting a battery pack.

A battery pack voltage detecting circuit device according to an embodiment of the present invention is a battery pack voltage detecting circuit device for detecting a voltage value from a battery pack including at least one group bank composed of two or more unit banks, A dividing circuit which receives voltage values from at least one group bank, generates a summed voltage value by summing the input voltage values, and generates a step-down voltage value by stepping down the summed voltage value; And an AFE for receiving the step-down voltage value generated in the dividing circuit through an input port corresponding one-to-one to the at least one group bank; . &Lt; / RTI >

The voltage values may be comprised of a plurality of voltage values input from each unit bank constituting unit banks included in the at least one group bank.

The level of the step-down may be determined in proportion to the number of unit banks constituting the at least one group bank.

The dividing circuit may reduce the summed voltage until a voltage value equal to a voltage value input from one unit bank that normally operates among the unit banks included in the at least one group bank.

Wherein the dividing circuit is configured to apply a predetermined voltage to the at least one group bank in order to protect the at least one of the at least one group bank, Generates a protection operation voltage level change request signal for requesting a change of the set protection operation voltage level value, and transmits the generated protection operation voltage level change request signal to the protection IC performing the protection operation through the AFE.

The dividing circuit may change the degree to which the summed voltage value of the group bank to which the abnormal unit bank belongs corresponds to the number of the abnormal unit banks when the abnormal unit bank is generated.

The battery pack voltage detection circuit device according to the embodiment of the present invention is configured such that the dividing circuit divides the voltage value of each unit bank from the group banks grouped into at least two unit banks among a plurality of unit banks included in the battery pack And the step-down voltage value can be output to one output port corresponding to one group bank. Therefore, the number of AFEs that are increased in proportion to the number of unit banks is reduced .

In addition, since the number of AFEs that increase in proportion to the number of unit banks can be reduced, the battery pack voltage detection circuit device according to the embodiment of the present invention can reduce the consumed power consumed by the reduced number of AFEs .

1 is a configuration diagram of a battery pack voltage detection circuit device according to an embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

A battery pack according to an embodiment of the present invention may store electrical energy and provide stored electrical energy. Such a battery pack may include a plurality of battery cells that can be charged and discharged.

Also, the battery pack may be a battery module composed of a predetermined number of battery cells. That is, the battery pack may include at least one battery module, and thus may include a plurality of battery cells.

In addition, when a plurality of battery modules constitute a battery pack, each battery module may be electrically connected to each other through various methods of series and / or parallel manner to meet specifications of a battery, a load, and the like.

Also, when a plurality of battery cells constitute a battery module, each of the battery cells may be electrically connected to each other through various methods of serial and / or parallel methods. Here, the type of the battery cell is not particularly limited. For example, the type of the battery cell may include a lithium ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, and the like.

A unit bank according to an embodiment of the present invention may include at least one battery cell.

A group bank according to an embodiment of the present invention may include two or more unit banks.

In addition, each unit bank constituting a plurality of unit banks included in a group bank according to an embodiment of the present invention has a voltage value input to each of the input ports provided corresponding to the dividing circuit on a one- As shown in FIG.

The number of input ports of the dividing circuit according to the embodiment of the present invention may be the same as the number of the unit banks included in the battery pack.

The number of output ports of the dividing circuit according to the embodiment of the present invention may be less than the total number of input ports of at least one AFE included in the battery pack voltage detection circuit device.

The number of input ports of the AFE according to the embodiment of the present invention may be provided in a number equal to or greater than the total number of group banks of the battery pack.

The protection operation voltage level change request signal according to the embodiment of the present invention is a signal for requesting a change of a protection operation voltage level value which is a voltage value for judging whether or not to start execution of a preset protection operation for protecting operation of the battery pack.

The abnormal unit bank according to the embodiment of the present invention may mean a unit bank for inputting an abnormal voltage value which is a voltage value different from the voltage value input by the steady state unit bank.

1. An example of a battery pack voltage detection circuit device according to an embodiment of the present invention

1 is a configuration diagram of a battery pack voltage detection circuit device according to an embodiment of the present invention.

Referring to FIG. 1, a battery pack voltage detection circuit device 100 according to an embodiment of the present invention may include a battery pack 110, a dividing circuit 120, and an AFE 130.

The battery pack 110 may include a plurality of unit banks 112 (112a, 112b, 112c, and 112n). Here, two or more unit banks of the plurality of unit banks 112 (112a, 112b, 112c, 112n) may be grouped to form group banks 111 (111a, 111b). That is, the battery pack 110 may include at least one group bank 111.

In addition, each unit bank belonging to at least one group bank 111 can input a voltage value to the dividing circuit 120.

The dividing circuit 120 may receive voltage values from a plurality of unit banks 112 (112a, 112b, 112c, and 112n) constituting the battery pack 110. [

The dividing circuit 120 may then generate at least one step-down voltage value from the input voltage values. Here, the step-down voltage value may be generated by generating a sum voltage value in which the voltage values input from the dividing circuit 120 are summed, and stepping down the generated sum voltage value.

In addition, the dividing circuit 120 may generate one step-down voltage value for each of the at least one group bank 112 constituting the battery pack 110.

In addition, the degree of the step-down in which the dividing circuit 120 reduces the summed voltage value may be determined in proportion to the number of the unit banks 112 constituting the at least one group bank 112.

In addition, when the summing voltage value is equal to the voltage value input from one unit bank that normally operates among the unit banks 112 included in at least one group bank 111 .

When an abnormal unit bank among the unit banks 112 included in at least one group bank 112 is generated, the dividing circuit 120 generates a protection operation voltage level change request for requesting a change in the protection operation voltage level value Signal can be generated.

Thereafter, the dividing circuit 120 may transmit the generated protection operation voltage level change request signal to the protection IC (not shown) performing the protection operation for the battery pack 110 through the AFE 130. [

In addition, when a voltage value that deviates from a preset normal voltage deviation range is input based on the voltage value in the steady state, the dividing circuit 120 can determine the voltage value as an abnormal voltage value.

Thereafter, the dividing circuit 120 can recognize the unit bank into which the abnormal voltage value is inputted as an ideal unit bank.

In addition, when at least one unit bank is generated in the group bank 111, the dividing circuit 120 divides the summed voltage value of the group bank to which the abnormal unit bank belongs, You can change the degree.

Thereafter, the dividing circuit 120 may transmit the step-down voltage value generated for each group bank 111 through one output port electrically connected to one input port provided in the AFE 130. [

The AFE 130 may receive at least one step-down voltage value generated in the dividing circuit 120 through an input port corresponding one-to-one with the at least one group bank 112.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.

100: Battery pack voltage detection circuit device
110: Battery pack
111: Unit bank
112: Group Bank
120: Dividing circuit
130: AFE

Claims

A battery pack voltage detection circuit device for detecting a voltage value from a battery pack including at least one group bank composed of two or more unit banks,
A dividing circuit for receiving voltage values from the at least one group bank, generating a summed voltage value by summing the input voltage values, and generating a step-down voltage value by decreasing the summed voltage value; And
An AFE for receiving the step-down voltage value generated in the dividing circuit through an input port corresponding one-to-one to the at least one group bank; And the battery pack voltage detection circuit device.

The method of claim 1,
And a plurality of voltage values input from each unit bank constituting unit banks included in the at least one group bank.

The semiconductor memory device according to claim 1, wherein the dividing circuit comprises:
Wherein the degree of the voltage drop is determined in proportion to the number of unit banks constituting the at least one group bank.

The semiconductor memory device according to claim 1, wherein the dividing circuit comprises:
And the summed voltage value is lowered to a voltage value equal to a voltage value input from one unit bank normally operating among the unit banks included in the at least one group bank.

The apparatus of claim 1, wherein the dividing circuit comprises:
When an abnormal unit bank, which is a unit bank for inputting a voltage value different from a steady state voltage value among the unit banks included in the at least one group bank, is generated, a protective operation voltage level value And transmits the generated protection operation voltage level change request signal to the protection IC performing the protection operation through the AFE.

The semiconductor memory device according to claim 5, wherein the dividing circuit comprises:
And changes the degree to which the summed voltage value of the group bank to which the abnormal unit bank belongs corresponds to the number of the abnormal unit banks when the abnormal unit bank is generated.