KR102157783B1 - Battery management system for electric vehicle - Google Patents

Abstract

The present invention is to provide a battery management system, wherein the battery management system is included in one battery pack and includes at least one battery cell including a negative plate and a positive plate, a negative output terminal for outputting a voltage of the negative plate, and a voltage of the positive plate. The positive output terminal is included in the battery pack, a battery management module that electrically connects and cuts off the battery cell and the positive output terminal, and is configured on the outside of the battery pack, one end is electrically connected to the positive plate, and the other end is connected to the battery management module. And an ignition switch that is electrically connected to control starting of the battery management module. At this time, when the ignition switch is turned on, the battery management module is turned on when the residual voltage of the battery cell is above the threshold value, and operates so that the voltage of the battery cell is output through the positive output terminal, and remains off when the residual voltage of the battery cell is less than the threshold. do.

Description

Electric vehicle battery management system {BATTERY MANAGEMENT SYSTEM FOR ELECTRIC VEHICLE}

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

Recently, as batteries used in vehicles, the use of lithium batteries having a long life and excellent electrical characteristics is increasing. Since the lithium battery has to block complete discharge due to its characteristic, it may be installed to cut off electrical connection to the vehicle system using a relay when the state of charge of the battery is lower than a preset threshold voltage (discharge lower limit voltage). The auxiliary battery system including such a lithium battery and a relay is required to be properly controlled according to various situations, and thus needs to be managed using a separate controller such as a battery management system of a vehicle.

Meanwhile, an electric vehicle or a fuel cell vehicle, which is an eco-friendly vehicle, includes a low-voltage battery (also referred to as a'auxiliary battery') to provide power necessary for starting the vehicle and to provide power to electric loads operating at a low voltage. In addition, even in a general internal combustion engine vehicle, a rechargeable battery may be provided to start the vehicle or provide power to electric loads.

Electric vehicles mainly use battery power to drive AC or DC motors to obtain power, while battery-only electric vehicles use battery power to drive motors and recharge when power is exhausted. In addition, in the conventional fuel vehicle, a small battery is used, and the energy of the small battery is used when operating a load inside the electric field or starting the engine.

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

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

Republic of Korea Patent Laid-Open Patent No. 10-2018-0112560 (Name of invention: Over-discharge prevention device and method for vehicle battery)

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

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

As a technical means for achieving the above-described technical problem, a battery management system according to an aspect of the present invention includes 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 a voltage of the negative plate and an anode output terminal for outputting a voltage of the positive plate; A battery management module included in the battery pack and electrically connecting and disconnecting the battery cell and the positive output terminal; And an ignition switch configured outside of the battery pack, one end electrically connected to the positive plate, and the other end electrically connected to the battery management module to control startup of the battery management module, and the ignition switch is turned on. When (turn on), the battery management module is turned on when the residual voltage of the battery cell is greater than or equal to a threshold, and operates to output the voltage of the battery cell through the positive output terminal, and the residual voltage of the battery cell is less than the threshold. If it is, it maintains the off state.

In this case, the battery management module includes: an output control switching element positioned between the positive plate and the positive output terminal to electrically connect and cut off the positive plate and the positive output terminal; A controller for controlling on/off driving of the output control switching element; A regulator electrically connected between the positive electrode plate and the controller, converting a voltage input from the positive electrode plate into a predetermined voltage and outputting the converted voltage as a driving voltage of the controller; And a voltage dividing circuit connected to the positive plate while the ignition switch is on to distribute the residual voltage of the positive plate at a predetermined ratio, wherein one end of the ignition switch is connected to the positive 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, and when the ignition switch is turned on, the residual voltage of the positive plate is reduced through the voltage distribution circuit, and the reduced pressure A voltage is input to the regulator as a driving voltage, and when the driving voltage input to the regulator is greater than or equal to a threshold value, the regulator is activated, and when it is less than the threshold value, the regulator is deactivated.

In this case, the voltage divider circuit includes a first resistor and a second resistor having a resistance value smaller than the first resistor, and the other end of the ignition 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 is connected to a contact between the other end of the first resistor and one end of the second resistor. have.

In this case, when the ignition switch is turned off, the battery management module may be turned off.

In addition, a battery management system of a parallel type battery pack according to another aspect of the present invention includes at least one battery cell including a negative plate and a positive plate, each included in one battery pack, and outputting the voltage of the negative plate. A cathode output terminal, an anode output terminal for outputting the voltage of the positive plate, and a battery management module included in the one battery pack and electrically connecting and disconnecting the battery cell and the positive output terminal Two or more battery packs; And the two or more battery packs are configured outside of the two or more battery packs to be shared and used, but one end is electrically connected to the positive plate for each battery pack, and the other end is electrically connected to the battery management module for each battery pack. And a ignition switch for controlling the starting of the battery management module, and 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 value. Operates to output a voltage through the positive 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 moves the ignition switch between the positive plate and the ignition switch. And a first back electromotive force prevention element that operates only with

In this case, the battery management module may further include a second counter electromotive force prevention element electrically connected between the positive output terminal and the final output terminal and operating only in a 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 motorcycle, the battery management module is located between the battery cell and the battery output terminal, but the driving of the battery management module is controlled by an external switch. By doing so, the battery management module is kept in the off state until the switch is turned on, so that the voltage of the battery cell is not output, thereby preventing overdischarge.

In addition, even when the external switch is turned on, even if the residual voltage of the battery cell is not enough to turn on the battery management module, the battery management module is maintained in an off state, so that the voltage of the battery cell is not output, thereby preventing overdischarge.

In addition, 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 outside when the battery management module is turned off. In case of external problems such as moisture or shock, the battery pack can be reliably protected.

In addition, according to any one of the problem solving means of the present invention, it is possible to turn on or off the battery management module inside the battery pack only by controlling a switch mounted outside of the battery pack, thereby conveniently preventing battery overdischarge. I can.

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 a 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 main 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 a 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 of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts irrelevant to the description are omitted in the drawings, and similar reference numerals are assigned to similar parts throughout the specification. In addition, while describing with reference to the drawings, the drawing numbers may vary depending on the drawings even if the configuration is indicated by the same name, and the drawing numbers are only described for convenience of description, and the concept, features, and functions of each configuration are indicated by the corresponding drawing numbers. Or the effect is not to be interpreted as limiting.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only "directly connected" but also "electrically connected" with another element interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further included, and one or more other components are not excluded unless specifically stated to the contrary. It is to be understood that the presence or addition of features, numbers, steps, actions, elements, parts, or combinations thereof, does not preclude the possibility of preliminary exclusion.

In this specification, the term'section' or'module' includes a unit realized by hardware or software, and a unit realized using both, and one unit is realized using two or more hardware. Alternatively, two or more units may be realized by one piece of hardware.

Hereinafter, a configuration and operation of a 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 to be described below may be a battery management system used for electric vehicles and electric motorcycles, 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. A cell pack 110, an output terminal 120 that outputs the voltage of the cell pack 110 to the outside, and the cell pack 110 and the output terminal are positioned between the cell pack 110 and the output terminal 120 The battery management module 130 electrically connecting or disconnecting the 120, and the cell pack 110 and the battery management module 130 are positioned between the cell pack 110 and the battery management module 130 to electrically connect the cell pack 110 and the battery management module 130. It includes a start switch 140 to connect or disconnect.

In this case, 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 of the battery pack 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 due to external conditions such as moisture. In addition, the battery pack needs to prevent complete discharge due to the characteristics of the material (eg, lithium) of the cell pack 110.

Accordingly, 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, in 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 residual voltage of the cell pack 110 is in a stable state, and the residual voltage is When the size is in a discharge danger state, the battery management module 130 is maintained in an off state.

Specifically, the ignition switch 140 is configured outside the battery pack, and may be physically operated on/off or turned on/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 the on/off operation of the ignition switch 140 from the outside. The signal input module 141 may receive an operation control signal by communicating with the outside through a preset wired or wireless communication protocol. In addition, the signal input module 141 may be implemented integrally with the ignition switch 140, or may be included in a separate configuration from the ignition switch 140 and be 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 amount of the residual voltage of the cell pack 110 The module 130 may be enabled or disabled. In addition, when the ignition switch 140 is turned off, the battery management module 130 may be turned off.

Meanwhile, the battery management system 100 according to an embodiment of the present invention samples a voltage for each battery cell and processes cell balancing (for example, passive-cell balancing). front-end) module 150, a photo coupler 160 delaying 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) It may further include a line transceiver (Line Transceiver) 170 for transmitting and receiving a signal for controlling the voltage output and battery charging to a preset load through communication with the outside.

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

FIG. 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.

As shown in FIG. 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 of the battery cells 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 plate of the battery cell 111 and a positive output terminal for outputting the voltage of the positive plate of the battery cell 111.

In FIG. 2, the negative plate 112 and the positive plate 113 of the battery cell 111 are shown as separate blocks, but these are expressed separately for convenience of description and are 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 one block by integrating the negative plates 112 or the positive plates 113 of the plurality of battery cells 111, respectively. It is shown as.

In addition, in FIG. 2, for convenience of explanation, the negative output terminal 121 and the positive output terminal 122 of the output terminals 120 are shown to be included in the battery pack 10, but actually the negative output terminal 121 And at least a portion of the positive output terminal 122 may be exposed outside the battery pack 10.

2, the output control switching element 131 is located between the positive electrode plate 113 and the positive output terminal 122 of the battery cell 111, and electrically connects the positive plate 113 and the positive output terminal 122. Connect and disconnect. For example, the output control switching element 131 may use a power MOSFET capable of processing a large amount of power.

When the output control switching element 131 is turned on, the positive plate 113 is electrically connected to the positive output terminal 122 through the output control switching element 131, and the voltage of the positive plate 113 is positively output. 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 a 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 an 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 formed as a single chip to perform a predetermined function.

The regulator 133 is located between the positive electrode plate 113 and the controller 132, receives a voltage from the positive electrode plate 113, converts the input voltage to a predetermined 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. I can.

The voltage distribution circuit 134 is connected to the positive electrode plate 113 while the ignition switch 140 is on, and distributes the residual voltage of the positive electrode plate 113 at a predetermined ratio.

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

In more detail, as shown in FIG. 3, the voltage divider 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 ignition switch 140 is connected to the positive plate 113 and the other end is connected to one end of the first resistor 301. In addition, 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 ground. Further, the driving voltage input terminals EN/UV of the regulator 133 are connected to a contact 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 this driving voltage is flexible according to the magnitude of the residual voltage of the positive electrode plate 113.

As shown in FIG. 2, the regulator 133 is electrically connected to the positive plate 113 to receive a voltage input terminal (V-IN), and outputs an output voltage converted to a predetermined voltage to the controller 132. It includes a terminal (V-OUT).

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

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

Meanwhile, according to another embodiment of the present invention, a battery management system for a parallel type battery pack in which two or more battery packs are connected in parallel may be provided.

The battery management system of such a parallel type battery pack includes all the components of the battery management system 100 described above with reference to FIGS. 1 to 3 for each battery pack, but shares one ignition switch 140 to be used.

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, it is shown as an example that the battery management system 200 of the parallel type battery pack includes two battery packs 20-1 and 20-2. However, the number of battery packs is not limited.

In addition, even though the components are not shown in FIG. 4, the components of the battery management system 100 described above with reference to FIGS. 1 to 3 may be included as components of the battery management system 200 of the parallel type battery pack.

Referring to FIG. 4, the battery management system 200 of a parallel type battery pack includes two battery packs 20-1 and 20-2, and the two battery packs 20-1 and 20-2, respectively, One or more battery cells (i.e., cell packs) 210-1 and 210 including a negative plate (briefly indicated by'-' in FIG. 4) and a positive plate (briefly indicated by'+' in FIG. 4) -2), negative output terminals (221-1, 221-2) outputting the voltage of the negative plate, positive output terminals (222-1, 222-2) outputting the voltage of the positive plate, and one battery pack, And battery management modules 230-1 and 230-2 electrically connecting and disconnecting the battery cell and the positive output terminal.

At this time, the battery management modules 230-1 and 20-2 include all of the components described in FIG. 2 above, but in FIG. 4, the output control switching elements 231-1 and 231-2 as main components, and a 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 Shown.

In addition, the battery management system 200 of the parallel type battery pack includes a common ignition switch 140-1 configured outside the two battery packs 20-1 and 20-2 and used by the two battery packs. . At this time, the common ignition switch 140-1 has one end electrically connected to the positive 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. Control the starting of the module.

Meanwhile, compared to the battery management system 100 described above with reference to FIGS. 1 to 3, the battery management system 200 of a parallel type battery pack according to another embodiment of the present invention includes battery management modules 230-1 and 230- 2) The following components are further included.

As shown in FIG. 4, the battery management system 200 of the parallel type battery pack uses the common ignition switch 140-1 to prevent back electromotive force that may be generated inside the corresponding battery pack by other battery packs. The first back EMF prevention elements 250-1 and 250-2 and a second back EMF prevention element 260-1 for preventing back EMF that may occur in the direction of the battery pack from the final output terminal receiving the output voltage of each battery pack. , 260-2). For reference, in FIG. 4, the final output stage is the motor M of the electric motorcycle as an example, but the final output stage may be various loads of the electric motorcycle, and the type is not limited thereto.

At this time, the first back EMF prevention elements 250-1 and 250-2 are located between the positive plate and the common ignition switch 140-1 so that the voltage from the positive plate is output only in the direction of the common ignition switch 140-1. As a working device, one or more diodes can be used.

The second back EMF prevention 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 the corresponding battery packs 20-1 and 20- As a device that operates only in the voltage output direction of 2), more than one diode can be used.

5 is an example of a circuit diagram for explaining a driving voltage applied to a 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 divider circuit When this is 230kΩ and the second resistors 402-1 and 402-2 are 5kΩ, the result of measuring the residual voltage of the positive electrode plate reduced by the voltage distribution circuit through voltmeters VM1 and VM2 is shown.

Therefore, as shown in FIG. 5, when the common ignition switch 140-1 is turned on, the voltage applied from the positive plate is reduced by the voltage distribution circuit, so that 1.21V is applied as the driving voltage of the regulator of each battery pack. I can.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to 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 limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: battery management system
10: battery pack
110: battery cell pack 111: battery cell
112: negative plate 113: positive 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 electromotive force prevention element
260-1, 260-2: second back electromotive force prevention element

Claims (14)

One or more battery cells included in one battery pack and including a negative plate and a positive plate;
A cathode output terminal for outputting a voltage of the negative plate and an anode output terminal for outputting a voltage of the positive plate;
A battery management module included in the battery pack and electrically connecting and disconnecting the battery cell and the positive output terminal; And
It is configured outside the battery pack, one end is electrically connected to the positive plate and the other end is electrically connected to the battery management module and includes a start switch for controlling the starting 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 value and operates to output the voltage of the battery cell through the positive output terminal, and the remaining battery cell Maintains an off state when the voltage is less than the threshold,
The battery management module,
An output control switching element positioned between the positive plate and the positive output terminal to electrically connect and cut off the positive plate and the positive output terminal;
A controller for controlling on/off driving of the output control switching element;
A regulator electrically connected between the positive electrode plate and the controller, converting a voltage input from the positive electrode plate into a predetermined voltage and outputting the converted voltage as a driving voltage of the controller; And
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 plate at a predetermined ratio,
One end of the ignition switch is connected to the positive plate, the other end is connected to one end of the voltage distribution circuit, and the other end of the voltage distribution circuit is connected to a driving voltage input terminal of the regulator,
When the ignition switch is turned on, the residual voltage of the positive plate is reduced through the voltage distribution circuit, and the reduced voltage is input to the regulator as a driving voltage,
When the driving voltage input to the regulator is greater than or equal to a threshold, the regulator is activated, and when it is less than the threshold, the regulator is deactivated,
The voltage dividing circuit includes a first resistance and a second resistance having a resistance value smaller than the first resistance,
The other end of the ignition 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,
A 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.
delete delete The method of claim 1,
The battery management system further comprising a protection resistor between the positive plate and the ignition switch.
The method of claim 1,
Each of the negative and positive output terminals is at least partially exposed to the outside of the battery pack.
The method of claim 1,
Further comprising a signal input module receiving an operation control signal for controlling the on/off operation of the ignition switch from the outside,
The signal input module receives the operation control signal through a predetermined wired or wireless communication protocol.
The method of claim 1,
When the ignition switch is turned off (turn off), the battery management module is turned off (off).
In the battery management system of the parallel type battery pack,
Each, one or more battery cells included in one battery pack including a negative plate and a positive plate, a cathode output terminal for outputting the voltage of the negative plate, and an anode output for outputting the voltage of the positive plate At least two battery packs including a terminal and a battery management module included in the one battery pack and electrically connecting and disconnecting the battery cell and the positive output terminal; And
The two or more battery packs are configured outside of the two or more battery packs to be shared and used, but one end is electrically connected to the positive plate for each battery pack, and the other end is electrically connected to the battery management module for each battery pack. Includes one ignition switch for controlling the starting 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 value and operates to output the voltage of the battery cell through the positive output terminal, and the remaining battery cell When the voltage is less than the threshold, maintains an off state,
The battery management module,
A battery management system of a parallel type battery pack, comprising a first back electromotive force prevention element operating only in the direction of the ignition switch between the positive plate and the ignition switch.
The method of claim 8,
The battery management module,
The battery management system of a parallel type battery pack, which is electrically connected between the positive output terminal and the final output terminal, and further comprises a second back electromotive force prevention element operating only in a 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 plate and the positive output terminal to electrically connect and cut off the positive plate and the positive output terminal;
A controller for controlling on/off driving of the output control switching element; And
A regulator electrically connected between the positive electrode plate and the controller, converting a voltage input from the positive electrode plate into a predetermined voltage and outputting the converted voltage as a driving voltage of the controller; And
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 plate at a predetermined ratio,
One end of the ignition switch is connected to the positive plate, the other end is connected to one end of the voltage distribution circuit, and the other end of the voltage distribution circuit is connected to a driving voltage input terminal of the regulator,
When the ignition switch is turned on, the residual voltage of the positive plate is reduced through the voltage distribution circuit, and the reduced voltage is input to the regulator as a driving voltage,
When a driving voltage input to the regulator is greater than or equal to a threshold, the regulator is activated, and when the voltage is less than the threshold, the regulator is deactivated.
The method of claim 10,
The voltage dividing circuit includes a first resistance and a second resistance having a resistance value smaller than the first resistance,
The other end of the ignition 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,
A battery management system for a parallel type battery pack, wherein a 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 method of claim 8,
The negative and positive output terminals are at least partially exposed to the outside of the battery pack, respectively, a battery management system of a parallel type battery pack.
The method of claim 8,
Further comprising a signal input module receiving an operation control signal for controlling the on/off operation of the ignition switch from the outside,
The signal input module is to receive the operation control signal through a predetermined wired or wireless communication protocol, a battery management system of a parallel type battery pack.
The method of claim 8,
When the ignition switch is turned off, the battery management module is turned off.

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