KR20200069764A - Battery management system for electric vehicle - Google Patents

Abstract

The present invention provides a battery management system capable of preventing over-discharge of a battery. The battery management system includes: one or more battery cells included in one battery pack, and including a negative electrode plate and a positive electrode plate; a negative electrode output terminal and a positive electrode output terminal for outputting voltages of the negative electrode plate and the positive electrode plate, respectively; a battery management module included in the battery pack, and configured to electrically connect and block the battery cell to and from the positive output terminal; and a starting switch provided outside the battery pack, and having one end electrically connected to the positive electrode plate and an opposite other end electrically connected to the battery management module so as to control starting of the battery management module. In the case, when the starting switch is turned on, the battery management module is turned on to operate so as to output a voltage of the battery cell through the positive output terminal when a residual voltage of the battery cell is greater than or equal to a threshold value, and maintained in an off-state when the residual voltage of the battery cell is less than the threshold value. The present invention provides a battery management system capable of preventing over-discharge of a battery. The battery management system includes: one or more battery cells included in one battery pack, and including a negative electrode plate and a positive electrode plate; a negative electrode output terminal and a positive electrode output terminal for outputting voltages of the negative electrode plate and the positive electrode plate, respectively; a battery management module included in the battery pack, and configured to electrically connect and block the battery cell to and from the positive output terminal; and a starting switch provided outside the battery pack, and having one end electrically connected to the positive electrode plate and an opposite other end electrically connected to the battery management module so as to control starting of the battery management module. In the case, when the starting switch is turned on, the battery management module is turned on to operate so as to output a voltage of the battery cell through the positive output terminal when a residual voltage of the battery cell is greater than or equal to a threshold value, and maintained in an off-state when the residual voltage of the battery cell is less than the threshold value.

Description

Battery management system for electric vehicles{BATTERY MANAGEMENT SYSTEM FOR ELECTRIC VEHICLE}

The present invention relates to a battery management system (BMS) for managing a battery of an electric vehicle.

2. Description of the Related Art Recently, as a battery used in a vehicle, the use of a lithium battery having a long life and excellent electrical characteristics is increasing. Since the lithium battery must block complete discharge due to its characteristics, if the state of charge of the battery is lower than a preset threshold voltage (lower discharge limit voltage), it can be installed to cut off the electrical connection to the vehicle system using a relay. Since the auxiliary battery system including the lithium battery and the relay needs proper control according to various situations, it needs to be managed by using a separate controller such as a battery management system of a vehicle.

On the other hand, an electric vehicle or a fuel cell vehicle, which is an eco-friendly vehicle, is provided with a low-voltage battery (also referred to as a'secondary battery') to provide power required for starting the vehicle and power to electric loads operating at a low voltage. Further, even in a general internal combustion engine vehicle, a rechargeable battery may be provided to provide power for starting the vehicle or for electric loads.

The electric vehicle mainly uses an AC or DC motor to obtain power from the battery, and the battery-only electric vehicle uses the battery power to drive the motor and recharges when the power is exhausted. In addition, the existing fuel vehicle uses a small battery, and uses the energy of the small battery when operating a load in the battlefield or when starting.

At this time, in the case of an electric vehicle, a phenomenon in which a small auxiliary battery is discharged after the start is finished may occur. In this case, even if there is a high-voltage battery for the operation of the vehicle, when the auxiliary battery reaches the discharge end voltage, it can no longer be used, and the electric vehicle system cannot resume driving.

Therefore, there is a need for a battery management system capable of preventing over-discharge of low-voltage batteries used in electric vehicles and electric motorcycles.

Republic of Korea Patent Publication No. 10-2018-0112560 (name of the invention: a device and method for preventing overdischarge of a vehicle battery)

An embodiment of the present invention is to provide a battery management system that prevents overdischarge of a battery used in electric vehicles and electric motorcycles.

However, the technical problems to be achieved by the present embodiment are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, a battery management system according to an aspect of the present invention is included in one battery pack, one or more battery cells (battery cell) including a negative electrode plate and a positive electrode plate; A cathode output terminal for outputting the voltage of the cathode plate and an anode output terminal for outputting the voltage of the anode plate; A battery management module included in the battery pack and electrically connecting and blocking the battery cell and the positive output terminal; And a start switch configured outside the battery pack, one end being electrically connected to the positive electrode plate and the other end being electrically connected to the battery management module to control the start of the battery management module, wherein the start switch is turned on. When turned on, the battery management module is turned on when the residual voltage of the battery cell is greater than or equal to a threshold, so that the voltage of the battery cell is output through the positive output terminal, and the residual voltage of the battery cell is less than the threshold In this case, it remains off.

At this time, the battery management module, an output control switching element positioned between the positive electrode plate and the positive electrode output terminal to electrically connect and block the positive electrode plate and the positive electrode output terminal; A controller that controls on/off driving of the output control switching element; A regulator that is electrically connected between the positive electrode plate and the controller, transforms a voltage input from the positive electrode plate to a constant voltage and outputs it as a driving voltage of the controller; And a voltage distribution circuit connected to the positive electrode plate in a state in which the ignition switch is on to distribute the residual voltage of the positive electrode plate at a constant rate, wherein one end of the ignition switch is connected to the positive electrode plate and the other end is the voltage. It is connected to one end of the distribution circuit, the other end of the voltage distribution circuit is connected to the driving voltage input terminal of the regulator, when the ignition switch is turned on, the residual voltage of the positive electrode plate is depressurized through the voltage distribution circuit, and the depressurized When the voltage is input to the regulator as a driving voltage, and the driving voltage input to the regulator is greater than or equal to a threshold, the regulator is activated, and if it is less than the threshold, the regulator may be deactivated.

At this time, the voltage distribution circuit includes a first resistor and a second resistor having a smaller resistance value than the first resistor, the other end of the start switch is connected to one end of the first resistor, and the other end of the first resistor Is connected to one end of the second resistor, the other end of the second resistor is connected to ground, and the driving voltage input terminal of the regulator may be connected to a contact between the other end of the first resistor and one end of the second resistor. have.

At this time, when the ignition switch is turned off, the battery management module may be turned off.

In addition, the battery management system of the parallel type battery pack according to another aspect of the present invention, each of which is included in one battery pack, one or more battery cells (battery cell) including a negative electrode plate and a positive electrode plate, to output the voltage of the negative electrode plate A cathode output terminal, an anode output terminal for outputting the voltage of the anode plate, and a battery management module included in the one battery pack and electrically connecting and blocking the battery cell and the anode output terminal Two or more battery packs; And configured outside of the two or more battery packs, the two or more battery packs are shared and used, one end being electrically connected to the positive electrode plate for each battery pack, and the other end being electrically connected to the battery management module for each battery pack. It includes a single start switch to control the start of the battery management module, and when the start switch is turned on, the battery management module is turned on when the residual voltage of the battery cell is above a threshold to turn on the battery cell. A voltage is operated to be output through the positive electrode output terminal, and maintains an off state when the residual voltage of the battery cell is less than the threshold, but the battery management module is directed to the starting switch between the positive electrode plate and the starting switch It includes a first anti-electromotive force protection element that operates only.

In this case, the battery management module may further include a second counter electromotive force preventing element that is electrically connected between the positive output terminal and the final output terminal and operates only in the voltage output direction of the battery pack.

According to any one of the above-described problem solving means of the present invention, in a battery pack applied to an electric vehicle or an electric two-wheeled vehicle, a battery management module is positioned between a battery cell and a battery output terminal, but driving of the battery management module is controlled by an external switch. By doing so, the battery management module maintains the off state until the switch is turned on, so that the voltage of the battery cell is not output, thereby preventing over-discharge.

In addition, even when the external switch is turned on, even when the remaining voltage of the battery cell is not sufficient to turn on the battery management module, the battery management module maintains an off state, so that the voltage of the battery cell is not output, thereby preventing over-discharge.

Further, according to any one of the problem solving means of the present invention, even when the output terminal is exposed to the outside of the battery pack, the voltage of the battery cell is not output to the output terminal when the battery management module is off. The battery pack can be stably protected even in the event of an external problem such as moisture or shock.

In addition, according to any one of the problem solving means of the present invention, the battery management module inside the battery pack can be turned on or off only by controlling a switch mounted on the outside of the battery pack, thereby conveniently preventing battery over-discharge. Can be.

1 is a block diagram illustrating an overall configuration of a battery management system according to an embodiment of the present invention.
2 is a block diagram illustrating the configuration of a battery management module according to an embodiment of the present invention.
3 is a block diagram illustrating a connection relationship between the battery management module of FIG. 2 and other major components.
4 is a block diagram illustrating a connection relationship between main components of a battery management system according to another embodiment of the present invention.
5 is an example of a circuit diagram for explaining a driving voltage applied to the regulator of each battery pack when the common ignition switch of FIG. 4 is turned on.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts not related to the description are omitted in the drawings, and like reference numerals are assigned to similar parts throughout the specification. In addition, with reference to the drawings, even in the case of the configuration indicated by the same name, the drawing number may vary depending on the drawing, and the drawing number is merely described for convenience of description, and the concept, features, and functions of each configuration are indicated by the corresponding drawing number. Or, the effect is not to be interpreted limitedly.

Throughout the specification, when a part is "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element in between. . Also, when a part is said to "include" a certain component, this means that the component may further include other components, not exclude other components, unless otherwise stated. It should be understood that features or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

In the present specification, the term “unit” or “module” includes a unit realized by hardware or software, and a unit realized by both, and one unit is realized by using two or more hardware. It may be, or two or more units may be realized by one hardware.

Hereinafter, the configuration and operation of the battery management system according to an embodiment of the present invention will be described in detail with reference to the drawings.

The battery management system according to an embodiment of the present invention described below may be a battery management system used in an electric vehicle, an electric two-wheeled vehicle, and the like, but is not limited thereto.

1 is a block diagram illustrating an overall configuration of a battery management system according to an embodiment of the present invention.

As shown in FIG. 1, the battery management system 100 according to an embodiment of the present invention is configured to correspond to any one battery pack, and includes one or more battery cells 111 The cell pack 110 and the output terminal are located between the cell pack 110, the output terminal 120 for outputting the voltage of the cell pack 110 to the outside, and the cell pack 110 and the output terminal 120. Battery management module 130 that electrically connects or blocks 120, and is located between cell pack 110 and battery management module 130 to electrically connect cell pack 110 and battery management module 130. It includes a start switch 140 for connecting or blocking.

At this time, the cell pack 110 and the battery management module 130 are configured inside the battery pack 10, and the output terminal 120 is configured inside the battery pack, but at least a portion may be exposed to the outside. As such, as the output terminal 120 is exposed to the outside, there is a risk that the battery pack is electrically damaged or exploded by external conditions such as moisture. In addition, the battery pack should prevent complete discharge due to the material (eg, lithium) characteristics of the cell pack 110.

Therefore, the battery management system 100 according to an embodiment of the present invention maintains the battery management module 130 in an off state when the battery pack 10 is in an idle state (ie, a non-use state), The voltage of the cell pack 110 is not output through the output terminal 120 exposed to the outside. In addition, when the battery pack 10 is switched from the idle state to the operating state, the battery management module 130 is turned on only when the magnitude of the residual voltage of the cell pack 110 is stable. When the size is in the danger of discharge, the battery management module 130 is maintained in the off state.

Specifically, the start switch 140 is configured outside the battery pack, and can be physically turned on/off (on/off), or turned on or off according to an external input signal. To this end, the battery management system 100 may further include a signal input module 141 that receives an operation control signal for controlling an on/off operation of the start switch 140 from the outside. The signal input module 141 may receive an operation control signal by communicating with the outside through a predetermined wired or wireless communication protocol. In addition, the signal input module 141 may be implemented integrally with the ignition switch 140, or may be embodied in a separate configuration from the ignition switch 140 and connected to interlock.

At this time, when the ignition switch 140 is turned on, a driving voltage according to the voltage of the cell pack 110 is applied to the battery management module 130, but the battery is managed according to the residual voltage of the cell pack 110. Module 130 may be enabled (enable) or disabled (unable). Also, when the start switch 140 is turned off, the battery management module 130 may be turned off.

On the other hand, the battery management system 100 according to an embodiment of the present invention, a battery management AFE (Analog) for sampling the voltage for each battery cell and processing the cell balancing (for example, passive cell balancing (passive-cell balancing)) The front-end module 150, the photo coupler 160 that delays the operation stop for a predetermined time to secure a memory storage time when the battery management module 130 is turned off, and a battery pack 10 and a line transceiver that transmits and receives a signal for controlling voltage output and battery charging to a predetermined load through communication with the outside may be further included.

Hereinafter, a connection relationship between main components of the battery management system 100 and an operation thereof will be described with reference to FIGS. 2 and 3.

2 is a block diagram illustrating a configuration of a battery management module according to an embodiment of the present invention, and FIG. 3 is a block diagram illustrating a connection relationship between the battery management module of FIG. 2 and other major components.

2, the battery management module 130 includes an output control switching element 131, a controller 132, a regulator 133, and a voltage distribution circuit 134.

Each battery cell 111 included in the cell pack 110 described above includes a negative plate and a positive plate. In addition, the output terminal 120 includes a cathode output terminal for outputting the voltage of the negative electrode plate of the battery cell 111 and an anode output terminal for outputting the voltage of the positive electrode plate of the battery cell 111.

In FIG. 2, the negative electrode plate 112 and the positive electrode plate 113 of the battery cell 111 are shown as separate blocks, but this is expressed separately for convenience of description and is actually included in one battery cell 111. In addition, when a plurality of battery cells 111 are included in one cell pack 110, FIG. 2 shows a single block by integrating the cathode plates 112 or the anode plates 113 of the plurality of battery cells 111, respectively. As shown.

In addition, in FIG. 2, for convenience of description, the negative output terminal 121 and the positive output terminal 122 among the output terminals 120 are illustrated as being included inside the battery pack 10, but actually the negative output terminal 121 And at least a portion of the anode output terminal 122 may be exposed outside the battery pack 10.

Referring to FIG. 2, the output control switching element 131 is positioned between the positive electrode plate 113 and the positive electrode output terminal 122 of the battery cell 111 to electrically connect the positive electrode plate 113 and the positive electrode output terminal 122. Connect and disconnect. For example, the output control switching element 131 may use a power MOSFET capable of handling large amounts of power.

When the output control switching element 131 is turned on, the positive electrode plate 113 is electrically connected to the positive output terminal 122 through the output control switching element 131, and the voltage of the positive electrode plate 113 is positive. It is output to the outside through the terminal 122.

The controller 132 controls on/off driving of the output control switching element 131.

At this time, the controller 132 receives the driving voltage from the regulator 133, and turns on the output control switching element 131 when the driving voltage is input. When the driving voltage from the regulator 133 is not input, the controller 132 may turn off the output control switching element 131 while the operation stop is delayed through the photo coupler 160. For example, the controller 132 may use a microcontroller in which a microprocessor and an input/output module are made of one chip to perform a predetermined function.

The regulator 133 is located between the anode plate 113 and the controller 132, receives a voltage from the anode plate 113, transforms the input voltage to a constant voltage, and outputs it as a driving voltage of the controller 132. For example, the regulator 133 is a step-down regulator that reduces the voltage of the battery cell 111 to a voltage required for driving the controller 132, and includes a DC/DC converter. Can be.

The voltage distribution circuit 134 is connected to the positive electrode plate 113 while the start switch 140 is turned on, and distributes the residual voltage of the positive electrode plate 113 at a constant rate.

One end of the ignition switch 140 is connected to the positive electrode plate 113 and the other end is connected to one end of the voltage distribution circuit 134. The other end of the voltage distribution circuit 134 is connected to the driving voltage input terminal of the regulator 133. For reference, the front end of the start switch 140 (ie, the positive electrode plate 113 side) may further include a protection resistor 142 that prevents the large-capacity voltage of the positive electrode plate 113 from being applied to the start switch 140 as it is.

In more detail, as shown in FIG. 3, the voltage distribution circuit 134 includes a first resistor 301 and a second resistor 302, but the resistance value of the second resistor 302 is the first resistor ( 301).

At this time, one end of the start switch 140 is connected to the positive electrode plate 113 and the other end is connected to one end of the first resistor 301. And the other end of the first resistor 301 is connected to one end of the second resistor 302, and the other end of the second resistor 302 is connected to the ground. In addition, the driving voltage input terminal EN/UV of the regulator 133 is connected to the contact point P30 between the other end of the first resistor 301 and one end of the second resistor 302. Accordingly, the voltage applied to the second resistor 302 is applied to the regulator 133 as a driving voltage, and the magnitude of the driving voltage is flexible according to the residual voltage magnitude of the positive electrode plate 113.

As shown in FIG. 2, the regulator 133 is electrically connected to the positive electrode plate 113 to output a terminal V-IN receiving a voltage and an output voltage at which the input voltage is transformed into a constant voltage to the controller 132. Terminal (V-OUT).

At this time, in order to activate the regulator 133 to perform a voltage change and an output operation of the input voltage, a driving voltage is applied to the driving voltage input terminal EN/UV of the regulator 133, but a preset enable voltage is enabled. voltage) or higher.

That is, when the start switch 140 is turned on, the residual voltage of the positive electrode plate 113 is decompressed through the voltage distribution circuit 134, and the decompressed voltage is input to the regulator 133 as a driving voltage and input to the regulator 133 The regulator 133 is activated when the driven voltage is greater than or equal to the threshold (ie, the enable voltage), and the regulator 133 is deactivated when it is less than the threshold.

Meanwhile, according to another embodiment of the present invention, it is possible to provide a battery management system for a parallel battery pack in which two or more battery packs are connected in parallel.

The battery management system of the parallel type battery pack includes all the configurations of the battery management system 100 described above with reference to FIGS. 1 to 3 for each battery pack, and uses one start switch 140 by sharing.

4 is a block diagram illustrating a connection relationship between main components of a battery management system according to another embodiment of the present invention.

In FIG. 4, the battery management system 200 of the parallel battery pack includes two battery packs 20-1 and 20-2 as an example. However, the number of battery packs is not limited.

In addition, although not illustrated in FIG. 4, all components of the battery management system 100 described with reference to FIGS. 1 to 3 may be included as components of the battery management system 200 of a parallel battery pack.

Referring to FIG. 4, the battery management system 200 of a parallel battery pack includes two battery packs 20-1 and 20-2, and the two battery packs 20-1 and 20-2 are respectively, One or more battery cells (i.e., cell packs) 210-1, 210 including a negative electrode plate (abbreviated as'-' in FIG. 4) and a positive electrode plate (abbreviated as'+' in FIG. 4) -2), the negative electrode output terminal (221-1, 221-2) for outputting the voltage of the negative electrode plate, the positive electrode output terminal (222-1, 222-2) for outputting the voltage of the positive electrode plate, and included in one battery pack, And battery management modules 230-1 and 230-2 that electrically connect and disconnect the battery cell and the positive output terminal.

At this time, the battery management module (230-1, 20-2) includes all of the components described in Figure 2 above, in Figure 4 as the main configuration of the output control switching elements (231-1, 231-2), voltage distribution circuit The two resistors (i.e., the first resistors 401-1 and 401-2) and the second resistors 402-1 and 402-2, and the driving voltage input terminals 233-1 and 233-2 of the regulator are briefly described. Shown.

In addition, the battery management system 200 of the parallel battery pack includes a common start switch 140-1 configured outside the two battery packs 20-1 and 20-2 and shared and used by the two battery packs. . At this time, the common start switch 140-1 has one end electrically connected to the positive electrode plate for each battery pack, and the other end electrically connected to the battery management modules 230-1 and 230-2 for each battery pack to manage each battery. Controls module startup.

On the other hand, compared to the battery management system 100 described above with reference to Figures 1 to 3, the battery management system 200 of the parallel type battery pack according to another embodiment of the present invention is a battery management module (230-1, 230-) 2) Each includes the following components.

As illustrated in FIG. 4, the battery management system 200 of the parallel battery pack prevents back EMF that may be generated inside the corresponding battery pack by another battery pack by using the common start switch 140-1. The first anti-electromotive force preventing elements 250-1 and 250-2, and the second anti-electromotive force preventing element 260-1 preventing the back electromotive force that may occur in the direction of the corresponding battery pack from the final output terminal receiving the output voltage of each battery pack. , 260-2). For reference, in FIG. 4, although the final output stage is shown as an example of the motor M of the electric motorcycle, the final output stage may be various loads, etc. of the electric motorcycle, and the type is not limited thereto.

At this time, the first counter electromotive force preventing elements 250-1 and 250-2 are positioned between the positive electrode plate and the common start switch 140-1, so that the voltage from the positive electrode plate is output only in the direction of the common start switch 140-1. As a working element, one or more diodes can be used.

The second counter electromotive force preventing elements 260-1 and 260-2 are electrically connected between the positive output terminals 222-1 and 222-2 and the final output terminal M+, and corresponding battery packs 20-1 and 20- As a device operating only in the voltage output direction of 2), one or more diodes can be used.

5 is an example of a circuit diagram for explaining a driving voltage applied to the regulator of each battery pack when the common ignition switch of FIG. 4 is turned on.

In FIG. 5, the residual voltage of the battery cells 211-1 and 211-2 for each of the two battery packs 20-1 and 20-2 is 57V, and the first resistors 401-1 and 401-2 of the voltage distribution circuit are shown. When this is 230 kPa and the second resistors 402-1 and 402-2 are 5 kPa, the result of measuring the residual voltage of the positive electrode plate depressurized by the voltage distribution circuit through the voltmeters VM1 and VM2 is shown.

Therefore, as shown in FIG. 5, when the common start switch 140-1 is turned on, the voltage applied from the positive electrode plate is depressurized by the voltage distribution circuit, so that 1.21V is applied as the driving voltage of the regulator of each battery pack, respectively. Can be.

The above description of the present invention is for illustration only, and a person having ordinary knowledge in the technical field to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. do.

100: battery management system
10: battery pack
110: battery cell pack 111: battery cell
112: cathode plate 113: anode plate
120: output terminal 121: negative output terminal
122: positive output terminal
130: battery management module 131: output control switching element
132: controller 133: regulator
134: voltage distribution circuit 301: first resistor
302: second resistance
140: start switch 141: signal input module
142: protection resistance
150: battery management AFE module 160: photo coupler
170: line transceiver
200: parallel battery pack battery management system
20-1, 20-2: Battery pack
210-1, 210-2: battery cell 221-1, 221-2: negative output terminal
222-1, 222-2: positive output terminal
230-1, 230-2: Battery management module 231-1, 231-2: Output control switching element
401-1, 401-2: First resistor 402-1, 402-2: Second resistor
233-1, 233-2: Regulator driving voltage input terminal
140-1: common ignition switch
250-1, 250-2: first back EMF prevention element
260-1, 260-2: Second counter electromotive force prevention element

Claims (14)

One or more battery cells included in one battery pack and including a negative electrode plate and a positive electrode plate;
A cathode output terminal for outputting the voltage of the cathode plate and an anode output terminal for outputting the voltage of the anode plate;
A battery management module included in the battery pack and electrically connecting and blocking the battery cell and the positive output terminal; And
It is configured on the outside of the battery pack, one end is electrically connected to the positive electrode plate and the other end is electrically connected to the battery management module includes a start switch for controlling the start of the battery management module,
When the ignition switch is turned on, the battery management module is turned on when the residual voltage of the battery cell is greater than or equal to a threshold, so that the voltage of the battery cell is output through the positive output terminal, and the residual of the battery cell The battery management system is to maintain an off state when the voltage is below the threshold.
According to claim 1,
The battery management module,
An output control switching element positioned between the positive electrode plate and the positive electrode output terminal to electrically connect and block the positive electrode plate and the positive electrode output terminal;
A controller that controls on/off driving of the output control switching element;
A regulator that is electrically connected between the positive electrode plate and the controller, transforms a voltage input from the positive electrode plate to a constant voltage and outputs it as a driving voltage of the controller; And
And a voltage distribution circuit which is connected to the positive electrode plate in a state in which the ignition switch is turned on and distributes the residual voltage of the positive electrode plate at a predetermined ratio.
One end of the start switch is connected to the positive electrode plate, the other end is connected to one end of the voltage distribution circuit, the other end of the voltage distribution circuit is connected to the driving voltage input terminal of the regulator,
When the start switch is turned on, the residual voltage of the positive electrode plate is depressurized through the voltage distribution circuit, and the depressurized voltage is input to the regulator as a driving voltage,
If the driving voltage input to the regulator is greater than or equal to a threshold, the regulator is activated, and if it is less than the threshold, the regulator is deactivated.
According to claim 2,
The voltage distribution circuit includes a first resistor and a second resistor having a smaller resistance value than the first resistor,
The other end of the start switch is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to ground,
The driving voltage input terminal of the regulator is connected to a contact between the other end of the first resistor and one end of the second resistor, the battery management system.
According to claim 1,
And a protection resistor between the positive electrode plate and the ignition switch.
According to claim 1,
Each of the negative and positive output terminals is at least partially exposed to the outside of the battery pack, the battery management system.
According to claim 1,
Further comprising a signal input module for receiving an operation control signal for controlling the on / off operation of the start switch from the outside,
The signal input module is to receive the operation control signal through a predetermined wired or wireless communication protocol, the battery management system.
According to claim 1,
When the start switch is turned off (turn off), the battery management module is off (off), the battery management system.
In the battery management system of the parallel battery pack,
Each of one or more battery cells included in one battery pack but including a negative electrode plate and a positive electrode plate, a cathode output terminal for outputting the voltage of the negative electrode plate, and an anode output for outputting the voltage of the positive electrode plate Two or more battery packs including a terminal and a battery management module included in the one battery pack and electrically connecting and blocking the battery cell and the positive output terminal; And
It is configured outside the two or more battery packs, and the two or more battery packs are shared and used, but one end is electrically connected to the positive electrode plate for each battery pack, and the other end is electrically connected to the battery management module for each battery pack. It includes a single start switch for controlling the start of the battery management module,
When the ignition switch is turned on, the battery management module is turned on when the residual voltage of the battery cell is greater than or equal to a threshold, so that the voltage of the battery cell is output through the positive output terminal, and the residual of the battery cell If the voltage is below the threshold, it remains off,
The battery management module,
And a first reverse electromotive force preventing element that operates only in the direction of the starting switch between the positive electrode plate and the starting switch, the battery management system of a parallel battery pack.
The method of claim 8,
The battery management module,
A battery management system of a parallel type battery pack, which is electrically connected between the positive electrode output terminal and the final output terminal, and further includes a second counter electromotive force preventing element that operates only in the voltage output direction of the battery pack.
The method of claim 8,
The battery management module,
An output control switching element positioned between the positive electrode plate and the positive electrode output terminal to electrically connect and block the positive electrode plate and the positive electrode output terminal;
A controller that controls on/off driving of the output control switching element; And
A regulator that is electrically connected between the positive electrode plate and the controller, transforms a voltage input from the positive electrode plate to a constant voltage and outputs it as a driving voltage of the controller; And
And a voltage distribution circuit which is connected to the positive electrode plate in a state in which the ignition switch is turned on and distributes the residual voltage of the positive electrode plate at a predetermined ratio.
One end of the start switch is connected to the positive electrode plate, the other end is connected to one end of the voltage distribution circuit, the other end of the voltage distribution circuit is connected to the driving voltage input terminal of the regulator,
When the ignition switch is turned on, the residual voltage of the positive electrode plate is reduced through the voltage distribution circuit, and the reduced voltage is input to the regulator as a driving voltage,
A battery management system for a parallel battery pack, wherein the regulator is activated when the driving voltage input to the regulator is greater than or equal to a threshold, and deactivated when the driving voltage is lower than a threshold.
The method of claim 10,
The voltage distribution circuit includes a first resistor and a second resistor having a smaller resistance value than the first resistor,
The other end of the start switch is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is connected to ground,
The drive voltage input terminal of the regulator is connected to a contact between the other end of the first resistor and one end of the second resistor, the battery management system of the parallel battery pack.
The method of claim 8,
Each of the negative and positive output terminals is at least partially exposed to the outside of the battery pack, the battery management system of a parallel battery pack.
The method of claim 8,
Further comprising a signal input module for receiving an operation control signal for controlling the on / off operation of the start switch from the outside,
The signal input module is to receive the operation control signal through a predetermined wired or wireless communication protocol, the battery management system of a parallel battery pack.
The method of claim 8,
When the start switch is turned off (turn off), the battery management module is off (off), the battery management system of the parallel battery pack.

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