KR20180073764A - Method and apparatus for impact protection of battery pack - Google Patents

Abstract

The present invention relates to a method and an apparatus for protecting a battery pack from an impact. More specifically, the present invention relates to a method and an apparatus for protecting a battery from an impact which preform an appropriate protection control for impact occurrence based on a state of a battery pack due to an impact and the number of impact occurrence when the impact occurs in the battery pack. To this end, the method comprises: an impact sensing step; an impact number counting step; a first protection control performing step; and a second protection control performing step.

Description

METHOD AND APPARATUS FOR IMPACT PROTECTION OF BATTERY PACK BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery pack shock protection method and apparatus, and more particularly, to a battery pack shock protection method and apparatus, To a pack shock protection method and apparatus.

BACKGROUND ART [0002] A battery such as a lithium-ion (Li-ion) battery is used as a power source for various electronic apparatuses. Generally, a battery includes a plurality of unit cells each composed of a positive electrode collector, a separator, an active material, A plurality of assemblies, a plurality of assemblies, and a plurality of assemblies.

Generally, the battery has a battery management system (BMS) to periodically measure the current, voltage, and temperature. The battery state is determined based on each measured value. When the battery is abnormal, The battery is protected by performing the control.

The BMS also has a function of sensing the impact and controlling the battery driving. Generally, when a large impact is generated in the battery, the internal structure is broken and the electrolyte flows out to generate ignition and explosion to be.

In the conventional shock detection method, the battery operation is stopped based on only the amount of the impact generated in the battery, so that a predetermined reference impact amount is not generated but it is difficult to detect the abnormal state of the battery due to the impact.

Therefore, it is required to develop a technology capable of reducing the risk of ignition when an impact occurs in a battery based on various factors such as the number of impacts and various factors.

KR 2009-0032273 A

The present invention provides a method and apparatus for protecting a battery pack from impact by determining the occurrence of an impact based on various factors related to an impact generated in the battery, thereby improving impact detection capability and reducing the risk of occurrence of ignition.

A method for protecting a battery pack from an impact, the method comprising: sensing an impact generated in the battery pack; counting a number of impacts detected in the impact detection step; A first protection control step of decreasing a full charge reference voltage value so that the energy density of the battery pack is reduced when the number of impacts counted in the shock counting step exceeds a predetermined first reference value, And performing a second protection control based on a predetermined second reference value when the number of impacts counted in the impact number counting step is equal to or less than a predetermined first reference value.

The second protection control performing step includes a second reference value comparing step of comparing the number of times of the impact counted in the impact number counting step with a predetermined second reference value and a second reference value comparing step of comparing the number of impacts Voltage and temperature of the battery pack when the current value, the battery voltage, and the temperature of the battery pack exceed a predetermined second reference value; And determining whether a protection control is required by comparing the current value, the voltage value, and the temperature value of the battery pack with a reference value, And comparing the current value, the voltage value, and the temperature value of the battery pack with the permanent damage value comparison step, Or more damage value, and a protection fuse carpet comprising a carpet protection fuse.

If it is determined that the protection control is not needed in the protection control determination step, the cumulative number of impacts is maintained to return to the impact detection step.

And a protection circuit driving step of driving the protection circuit when the current, voltage and temperature of the battery pack are less than a predetermined permanent damage value as a result of the comparison of the permanent damage value comparison step.

And a protection control execution notification step of notifying the user of the execution of the protection control when the first protection control performing step or the second protection control executing step is performed.

The protecting fuse carpet rubs a protective fuse provided on a path for introducing or supplying a charge / discharge current to the battery pack.

The battery pack shock protection device according to the embodiment of the present invention is an apparatus for protecting a battery pack from an impact, the apparatus comprising: an impact sensing unit for sensing an impact generated in the battery pack; An impact number comparing section for comparing the number of impacts counted in the impact number counter with a predetermined first reference value and / or a predetermined second reference value, A first protection controller for controlling a first protection performance to reduce a full charge reference voltage value of the battery pack when the number of impacts is less than a predetermined first reference value, And a second protection controller for controlling a protection fuse of the battery pack or a second protection operation for driving the protection circuit.

The second protection control unit may include a state measurement unit that measures the current, voltage, and temperature of the battery pack when the number of impact times exceeds a predetermined second reference value in the impact number comparison unit, A protection control unit for comparing the current, the voltage, and the temperature value with a predetermined protection control reference value to determine whether or not the protection control is necessary; A permanent damage value comparator for comparing a temperature value with a predetermined permanent damage value; and a controller for comparing the current value, the voltage value, and the temperature value of the battery pack with a predetermined permanent damage value, A protective fuse rub part for driving a protective fuse provided in a current input / output path of the pack, and a comparison part for comparing the current, And if the temperature value is less than the set group permanent damage value, it is configured to include a protection circuit control the protection circuit provided with a switch that turns on the current of the battery pack / off controlled to be driven.

The impact detection unit may further include an impact amount sensing unit for sensing an impact amount of the impact generated in the battery pack to accumulate the sensed impact amount.

The protection circuit control unit may further include a notification unit for informing the user of the protection control when the protection control is performed by the first protection control unit or the second protection control unit.

The method and apparatus for protecting a battery pack according to an embodiment of the present invention performs different protection control according to each criterion based on the number of times of impacts generated in the battery and the state of the battery to which the impact is applied, And a safe battery can be used according to the response.

1 is a flowchart of a method of protecting a battery pack according to an embodiment of the present invention.
FIG. 2 is a flowchart of a second protection control of a battery pack shock protection method according to an embodiment of the present invention; FIG.
3 is a block diagram of a battery pack shock protection apparatus according to an embodiment of the present invention.
4 is a block diagram of a second protection control unit in a battery pack shock protection apparatus according to an embodiment of the present invention;
5 is a schematic diagram of a battery pack system 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. However, the present invention is not limited to or limited by the embodiments. Only embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art.

Also, terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of identifying one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

≪ Example 1 >

Next, a battery pack shock protection method according to an embodiment of the present invention will be described.

The battery pack shock protection method of the present invention reduces the full charge reference voltage value based on the number of impacts applied to the battery pack, carries out a protective fuse rub or a protection circuit based on the number of times of shock and the state of the battery pack This is a method of protecting the battery pack from impact.

1 is a flowchart of a method for protecting a battery pack according to an embodiment of the present invention.

Referring to FIG. 1, a method for protecting a battery pack according to an embodiment of the present invention includes sensing a shock generated in a battery pack when an impact occurs in the battery pack (S110) The number of times of counting is counted (step S120).

When the number of times of the impact counted in the impact number count step S120 exceeds a predetermined first reference value (S130), the first protection control is performed (S140).

If the number of impacts counted in the impact count counting step S120 is equal to or less than a predetermined first reference value, a second protection control is performed based on a predetermined second reference value (performing a second protection control step: S150).

In addition, when the first protection control execution step (S140) or the second protection control execution step (S150) is performed, the protection control execution notification step may be further included to notify the user of the execution of the protection control.

This notifies the user of the current state of the battery pack and the corresponding protection control so that different setting values are given to the first protection control, the protection fuse driving and the protection circuit driving so that the user can easily recognize the state.

Each of the above steps will be described in detail below.

First, the impact sensing step S110 detects an impact applied to the battery pack by the impact sensing unit 110 described later.

In addition, it is possible to additionally set an optional element to select the first protection control performing step (S140) or the second protection control performing step (S150) by detecting the impact amount of the impact upon sensing the impact.

The impact number count step S120 is performed in the impact number counter 120 described below. When an impact occurs in the battery pack, the impact number count step S120 is regarded as occurrence of the impact number once and the first reference value or the second reference value The shock detection step (S110) is repeated until the number of impacts is accumulated.

In addition, an additional amount of accumulation step for accumulating the additional detected amount of impact may be additionally provided so that not only the number of times of impact but also the amount of impact can be accumulated.

The first reference value comparison step S130 is a step of comparing the number of times of the impact counted in the impact number count step S120 with a predetermined first reference value. When the number of impact times exceeds a predetermined first reference value The first protection control execution step S140 is performed, and if the number of impact times is equal to or less than the predetermined first reference value, the second protection control execution step S150 is performed.

In addition, the predetermined first reference value is set to 10 as one embodiment, but is not limited thereto.

Meanwhile, in the first protection control step (S140), if there is a risk of sudden explosion or ignition when the cumulative amount of impact of the battery pack is large, even if the current state of the battery pack does not cause an abnormality, Is reset. The value for resetting the full charge reference voltage value may be set to a preset reset value and may be set to the voltage value of the current battery pack at the time of performing the first protection control execution step S140.

This prevents the battery pack from increasing the energy density of the battery pack as it is prevented from further charging the battery pack, thereby reducing the risk of explosion or ignition.

In addition, the first protection control execution step S140 may determine whether or not the first protection control is performed using the additional amount of the detected and accumulated impact in the impact detection step S110.

This allows the protection control to be performed even when the number of impacts and the cumulative impact amount of the battery pack are large, but the battery pack does not have an abnormality.

The second protection control performing step S150 will be described in detail below with reference to FIG.

Referring to FIG. 2, the second protection control execution step S150 is performed when the number of impacts counted in the impact number counting step S120 is equal to or less than a predetermined first reference value.

If the number of impact times counted in the impact number count step S120 is compared with a predetermined second reference value again (second reference value comparison step: S151) and the number of impact times exceeds a predetermined second reference value, The current, voltage and temperature of the pack are measured (S152).

The current, voltage, and temperature measured in the battery pack status measuring step (S152) are compared with predetermined protection control reference values to determine whether a protection control is necessary (protection control determination step: S153).

If it is determined in step S153 that the protection control is required, the current, voltage, and temperature values of the battery pack are compared with predetermined permanent damage values (step S154) If the current, voltage and temperature values of the battery pack are above the predetermined permanent damage value, rinse the protective fuse (protective fuse rub step: S155).

If the current, voltage, and temperature of the battery pack are less than a predetermined permanent damage value, the self-protection circuit of the battery pack is driven (step S156).

The second reference value comparison step S151 may further include comparing the number of times of the impact counted in the impact number count step S120 with the predetermined number of times of the impact, With the second reference value, wherein the predetermined second reference value is a number smaller than the predetermined first reference value.

Here, the predetermined second reference value is set to five in one embodiment, but is not limited thereto.

If the number of times of shock exceeds a predetermined second reference value, the step of measuring the state of the battery pack (S152) is performed. If the number of shocks is equal to or less than a predetermined second reference value, The impact detection step S110 is performed again.

The step of measuring the state of the battery pack (S152) is a step of measuring current, voltage and temperature of the current battery pack. The structure of the battery pack may be broken and electrolytes may leak. Therefore, high current, high voltage, So that damage to the battery pack can be detected.

After performing the battery pack state measuring step S152, a protection control determining step S153 is performed based on the measured battery pack state.

The protection control determining step S153 is a step of determining whether a protection control is necessary after a small number of shocks have been generated but a damage has occurred in the battery pack. The current, voltage and temperature values measured in the battery pack state measuring step S152 It is determined whether or not the protection control is necessary by comparing with the preset protection control reference value.

The predetermined protection control reference value means a current, voltage, and temperature value which are driving conditions of a general battery protection circuit.

The predetermined protective control reference value is set to a current of 3 [A], a voltage of 4.2 [V], and a temperature of 65 [deg.] C, but is not limited thereto.

Therefore, when the current, voltage, and temperature measured in the battery pack state measuring step (S152) exceed the predetermined protection control reference value, it is determined that the battery pack needs to be protected, and the permanent damage value comparison step S154 ).

If the current, voltage, and temperature measured in the battery pack state measuring step (S152) are equal to or less than the predetermined protection control reference value, the battery pack determines that the protection control is not necessary, The impact detection step S110 is performed again.

This repeats the second protection control execution step (S150) until the first reference value is obtained to confirm the state of the battery pack.

If it is determined that the current, voltage, and temperature measured in the battery pack state measurement step (S152) exceed the predetermined protection control reference value, the battery pack determines that the protection control is required, S154), wherein the permanent damage value comparison step (S154) selects the protective circuit drive or protective fuse rub using a predetermined permanent damage value.

The predetermined permanent damage value is a reference current, a temperature, and a voltage value that the battery pack is determined to be permanently damaged. In one embodiment, the current is set to 4 [A], the temperature is 68 ° C, and the voltage is 4.5 [V].

This value is larger than the predetermined protective control reference value, which means a high current, a high voltage and / or a high temperature enough to damage the battery pack. If the value exceeds this value, the explosion and ignition of the battery pack occur .

Therefore, when the current, voltage, and temperature measured in the battery pack state measuring step (S152) exceed the predetermined permanent damage value, the battery pack is permanently damaged. Therefore, the protecting fuse rinsing step (S155) .

In addition, the protective fuse rinsing step S155 carries out the protection fuse provided on the path for introducing or supplying the charge / discharge current to the battery pack to prevent the explosion and ignition of the battery pack.

When the current, voltage, and temperature measured in the battery pack state measuring step (S152) are equal to or less than a preset permanent damage reference value, permanent damage is not generated in the battery pack. Therefore, The protection circuit driving step S156 is performed.

In addition, the protection circuit driving step S156 may further include a protection circuit releasing step when the protection circuit is driven so that the battery pack can be reused if the state of the battery pack satisfies predetermined protection circuit conditions.

The protection circuit releasing step may include a battery pack state remeasurement step of measuring the current, voltage and temperature of the battery pack at predetermined intervals, determining a current, voltage and temperature measured in the battery pack state measuring step, And a protection circuit releasing step of releasing the protection circuit driving when the measured current, voltage and temperature are less than a predetermined protection circuit releasing condition value.

The second protection performing step uses a general protection circuit driving method and a protection fuse, which can reduce the complexity of the software by utilizing a device performing a different role in the impact protection of the battery pack.

The second protection control is a method for protecting the battery pack even if the state of the battery pack is abnormal even if the number of times of shock does not reach a predetermined range.

In the above embodiment, when the number of impacts is more than the first reference value, only the full charge voltage value is decreased to decrease the energy density. If the voltage value at this time is full charge, only the full charge voltage value is decreased The method is ineffective.

Therefore, even in the fully charged state, the energy density should be substantially reduced in order to reduce the damage of explosion and ignition.

According to another aspect of the present invention, there is provided a method of protecting a battery pack from shock when a shock occurs in the battery pack, and the number of times the shock is sensed is counted.

And the voltage value of the battery pack is measured when the number of impacts counted in the shock count counting step exceeds a predetermined first reference value.

When the measured voltage value is greater than the predetermined voltage value, the self-discharge is performed until the voltage value of the battery pack reaches a predetermined voltage value.

Here, the predetermined voltage value means a minimum voltage value at which the battery pack can supply power to the load without a large risk of explosion and ignition.

If the number of times of the impact counted in the impact count counting step is less than or equal to a predetermined first reference value, the second protection control is performed based on a predetermined second reference value.

In addition, an impact amount accumulating step for accumulating a value by detecting an impact amount upon sensing a shock generated in the battery pack is further configured. This may be a problem when the accumulated impact amount does not change the state of the battery pack but exceeds a predetermined value, and thus is added as a judgment element for performing the first protection control.

If the amount of the impact is added to the protective control determination element, the self-discharge performed in the above-described manner can be performed up to the lowest discharge reference value of the battery pack.

≪ Example 2 >

Next, a battery pack impact protection apparatus according to an embodiment of the present invention will be described.

The battery pack shock protection device of the present invention senses an impact through a shock sensor of a battery pack and performs appropriate protection control according to the number of times of shocks generated in the battery pack and the condition of the battery pack, So that it can be used.

3 is a block diagram of a battery pack shock protection apparatus according to an embodiment of the present invention.

3, a battery pack shock protection apparatus 100 according to an embodiment of the present invention includes an impact detection unit 110 for detecting an impact generated in a battery pack, a number of impacts detected by the impact detection unit 110, An impact number comparing unit 130 for comparing the number of impacts counted by the impact number counter 120 with a predetermined first reference value and / or a predetermined second reference value, an impact number comparing unit 130 for counting the number of impacts The first protection control unit 140 and the impact number comparison unit 130 for controlling the first protection performance when the number of impacts exceeds a predetermined first reference value in the comparison unit 130, And a second protection controller 150 for controlling the second protection performance when the difference is less than the reference value.

Here, the battery pack impact protection device 100 may be provided inside or outside the BMS.

In addition, a notification unit (not shown) is additionally provided to notify the user that the first protection control unit 140 or the second protection control unit 150 is driven.

The above configuration will be described in more detail below.

The impact sensing unit 110 is configured to sense an impact applied from the outside and can be configured using a known impact sensing sensor. The impact sensing unit 110 senses that a shock having a predetermined impact amount is applied to the battery pack, And transmits an impact detection signal to the counter 120.

Here, the predetermined impact amount means the minimum impact amount generated when an external impact is generated.

At this time, the impact sensing unit 110 may detect only the occurrence of an impact or additionally detect an impact amount of the impact.

The impact frequency counter 120 receives the impact detection signal of the impact sensing unit 110, counts the number of impacts, and transmits the counted number of impacts to the impact frequency comparison unit 130.

The impact counter 120 may further include an impulse accumulator (not shown) for accumulating an additional impulse sensed by the impact sensor 110.

The impact number comparing unit 130 receives the number of impacts from the impact number counter 120 and compares the number of impacts with a predetermined first reference value. In addition, the predetermined first reference value is set to 10 in one embodiment, but is not limited thereto.

The impact frequency comparison unit 130 transmits a protection control drive signal to the first protection control unit 140 when the impact frequency exceeds the predetermined first reference value.

When the number of impacts is equal to or less than the predetermined first reference value, the number of impacts of the same value is compared with a predetermined second reference value. Here, the predetermined second reference value is set to five in one embodiment, but it is not limited thereto.

When the number of times of the shock exceeds the predetermined second reference value, the number-of-impact comparison unit 130 determines the state of the battery pack to measure the current, voltage, and temperature of the battery pack, And transmits a command signal.

When the number of times of the shock is equal to or less than the predetermined second reference value, the number of times of the shock is set to the number of times of the shocks counted by the impact number counter 130, Detection is then performed.

For example, when the impact number of the impact number comparing unit 130 is 3, and the impact detector 110 detects an impact, the impact number counter 130 counts 4 from 3 to 1 .

In addition, the first protection controller 140, which receives the protection control driving signal from the impact frequency comparator 130, sets the pre-charging reference voltage value of the battery pack to a reduced value so that the charging can be restricted when charging the battery pack.

This reduces the energy density of the battery pack and minimizes the risk of explosion and ignition.

In yet another embodiment, an impact quantity comparison unit (not shown) may be further provided to compare the accumulated quantity of the impact quantity with the predetermined set value in the impact quantity accumulation unit (not shown), so that the impact quantity comparison unit 130, (Not shown), the first protection control unit 140 can be driven when a protection control driving signal is received.

When the accumulated impact amount value is compared with a predetermined set value, the impact amount comparison unit (not shown) receives the accumulated impact amount value from the impact amount accumulation unit (not shown) 140, respectively.

If the accumulated impact amount is less than the predetermined set value, the value of the impact amount accumulating unit (not shown) is maintained, and if the shock is detected by the impact sensing unit 110, Accumulate at the impact.

Therefore, the first protection controller 140 is driven when the number of times of shock is large and the accumulated amount of the shock is large, but no abnormality occurs in the battery pack, and the second protection controller 150 is operated when the number of shocks is small, And is a protection control that is driven when it is generated.

The second protection control unit 150 will be described in detail with reference to FIG.

4 is a block diagram of a second protection control unit in a battery pack shock protection apparatus according to an embodiment of the present invention.

Referring to FIG. 4, a state measuring unit 151 for measuring current, voltage and temperature of the battery pack when a state measurement command signal is transmitted as a result of the comparison of the number-of-impacts comparing unit 130, A protection control determining unit 152 for comparing the measured current, voltage, and temperature measured by the control unit 151 with a preset reference value for protection control; A permanent damage value comparator 153 for comparing the current, voltage, and temperature values of the battery pack with a preset permanent damage value, and a permanent damage comparator 153 for comparing the current, Voltage and temperature values of the battery pack as a result of comparison in the protective fuse rub 154 and the permanent damage value comparator 153 for driving the protective fuse when the voltage and the temperature value are equal to or greater than a predetermined permanent damage value, Predefined permanent Is less than a value, and is configured to include a protection circuit control section 155 for controlling so that the protection circuit driving.

Hereinafter, each configuration of the second protection controller 150 will be described in detail.

The state measuring unit 151 senses the state of the battery pack using a current sensor, a voltage sensor, and a temperature sensor provided in each battery pack, and supplies the sensed current, voltage, Lt; / RTI >

In addition, the protection control determination unit 152 compares the current value, the voltage value, and the temperature value transmitted from the status measurement unit 151 with the preset protection control reference value, And transmits the same current, voltage, and temperature values to the permanent damage value comparing unit 153. [

If the current, voltage, and temperature values are less than or equal to the preset protection control reference value, the current number of shocks is set to the number of times of shocks counted by the impact number counter 130, Impact detection is subsequently performed.

This is to check if the impact frequency is small but the battery pack is in the normal state or not.

In addition, the permanent damage value comparator 153 compares the current, voltage, and temperature values received from the protection control determiner 152 with a predetermined permanent damage value.

If the current, voltage, and temperature values exceed the predetermined permanent damage value, the battery pack determines that permanent damage has occurred, and transmits a protective fuse driving signal to the protective fuse rubs 154.

The protection fuse rub 154 receiving the protection fuse driving signal from the permanent damage value comparator 153 carries the protection fuse provided in the current input / output path of the battery pack.

In addition, the protection circuit control unit 155 receiving the protection circuit driving signal from the permanent damage value comparing unit 153 transmits an OFF signal to the switch for turning on / off the current of the battery pack.

In addition, in the protection circuit driving state, the state measuring unit 151 measures the state of the battery pack at predetermined intervals and transmits current, voltage and temperature values to the protection control determining unit 152, and the protection control determining unit 152 Voltage, and temperature values with a predetermined protection circuit release value, and transmits a protection circuit release signal to the protection circuit control unit 155 when the current, voltage, and temperature values are less than a predetermined protection circuit release value.

The protection circuit control unit 155, which has received the protection circuit release signal from the protection control determination unit 152, transmits an ON signal for turning on the switch to the switch.

The battery pack system including the battery pack impact protection apparatus 100 will be described in detail with reference to FIG.

5 is a schematic diagram of a battery pack system according to an embodiment of the present invention.

Referring to FIG. 5, the battery pack system includes a battery pack, a BMS for managing the battery pack, a charge / discharge FET for on / off control from the BMS, a battery pack shock protection The apparatus 100 includes a protection fuse provided in a charging / discharging path and rubbed from the battery pack impact protection apparatus 100, and an impact sensor for detecting an impact generated from the outside.

The BMS may include a monitoring unit for periodically monitoring the state of the battery pack, a full charge voltage value setting unit for setting a full charge voltage value to limit charging during charging of the battery pack, and an overcurrent, overdischarge, And a battery protection circuit for stopping the operation of the battery pack when it is generated.

More specifically, the full-charge voltage setting unit may set the full-charge voltage value to a predetermined value in the first protection controller 140 in the battery pack shock protection apparatus 100 when the number of impacts detected from the impact sensor exceeds a predetermined first reference value The voltage value is transmitted, and the transmitted predetermined voltage value is reset to the full charge voltage value.

In addition, when the number of impacts detected from the impact sensor exceeds a second reference value, the monitoring unit monitors the current, voltage, and temperature values of the current battery pack transmitted from the state measuring unit 151 in the battery pack shock protection apparatus 100 And transmits the current, voltage, and temperature values of the current battery pack to the state measuring unit 151 according to the request signal.

When the protection circuit driving signal is transmitted from the protection circuit control unit 155 in the battery pack shock protection apparatus 100 to the battery pack protection circuit, Off control of the FET and the discharge FET.

Accordingly, the battery pack shock protection apparatus 100 senses an impact generated from the outside through the impact sensing unit 110, and the impact time counter 120 counts the number of sensed impacts.

The impact number comparing unit 130 compares the number of impacts counted by the impact number counter 120 with a predetermined first reference value.

When the counted number of times of shock exceeds a predetermined first reference value, a full charge voltage value is set to be decreased through the first protection controller 140.

If the counted number of shocks is equal to or less than a predetermined first reference value, the number of impacts is compared with a predetermined second reference value through the impact number comparing unit 130.

The current, voltage, and temperature of the battery pack are measured through the state measuring unit 151 when the counted number of times of shock exceeds a predetermined second reference value.

If the counted number of times of shock is less than or equal to a predetermined second reference value, the impact value is maintained and the impact is detected through the impact detection unit 110 again.

The protection control determination unit 152 compares the current, voltage, and temperature values of the battery pack measured through the state measurement unit 151 with a predetermined protection control reference value.

If the current, voltage, and temperature values exceed the preset protection control reference value, the permanent damage value comparator 153 compares the same current, voltage, and temperature values with predetermined permanent damage values.

If the current, voltage, and temperature values are less than or equal to a preset protection control reference value, the impact detection unit 110 maintains the impact frequency value and senses an impact through the impact detection unit 110 again.

If the current, voltage, and temperature values of the comparison result in the permanent damage value comparator 153 exceed the predetermined permanent damage value, the protective fuse is rubbed through the protective fuse rub 154.

If the current, voltage, and temperature values are less than or equal to a predetermined permanent damage value, the protection circuit control unit 155 drives the protection circuit.

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 or scope of the invention.

100: Battery pack shock protection device
110:
120: Shock Counter
130: Shock frequency comparator
140: first protection control unit
150: second protection control section
151:
152: Protection control judgment unit
153: Permanent damage value comparator
154: Protective fuse rub
155: Protection circuit control section

Claims (10)

A method for protecting a battery pack from an impact,
A shock sensing step of sensing a shock generated in the battery pack;
An impact number counting step of counting the number of impacts detected in the impact detection step;
Performing a first protection control step of decreasing a full charge reference voltage value such that the energy density of the battery pack is reduced when the number of times of the shocks counted in the shock frequency counting step exceeds a predetermined first reference value; And
Performing a second protection control based on a predetermined second reference value when the number of times of the impact counted in the impact number counting step is equal to or less than a predetermined first reference value; The method of claim 1,
The method according to claim 1,
Wherein the second protection control step comprises:
A second reference value comparison step of comparing the number of impacts counted in the impact number count step with a predetermined second reference value; And
Measuring a current, a voltage and a temperature of the battery pack when the number of impact times exceeds a predetermined second reference value as a result of the comparison in the second reference value comparison step;
Comparing the current, the voltage, and the temperature measured in the battery pack state measuring step with a preset reference value to determine whether a protection control is required;
Comparing the current value, the voltage value, and the temperature value of the battery pack with a predetermined permanent damage value when it is determined that the protection control is required in the protection control determination step; And
A protective fuse rinsing step of rinsing the protective fuse when the current, voltage, and temperature values of the battery pack are equal to or greater than a predetermined permanent damage value as a result of the comparison of the permanent damage value comparing step;
Wherein the battery pack (10)
The method of claim 2,
And if it is determined that the protection control is not needed in the protection control determination step, the cumulative number of times of impact is maintained and returned to the impact detection step.
The method of claim 2,
Driving the protection circuit when the current, voltage, and temperature values of the battery pack are less than a predetermined permanent damage value as a result of the comparison of the permanent damage value comparison step;
Wherein the battery pack (10)
The method of claim 4,
A protection control execution notification step of notifying a user of performing a protection control when the first protection control performing step or the second protection control executing step is performed;
The method comprising the steps of:
The method of claim 2,
Wherein the protective fuse rinsing step comprises rinsing a protective fuse provided on a path for introducing or supplying a charge / discharge current to the battery pack.
An apparatus for protecting a battery pack from an impact,
An impact sensing unit for sensing a shock generated in the battery pack;
An impact number counter for counting the number of impacts sensed by the impact sensing unit;
An impact number comparing unit for comparing the number of impacts counted in the impact number counter with a predetermined first reference value and / or a predetermined second reference value;
A first protection control unit for controlling a first protection function to reduce a full charge reference voltage value of the battery pack when the number of impact times exceeds a predetermined first reference value in the impact number comparison unit; And
A second protection control unit for controlling a second protection function for driving a protection fuse or a protection circuit of the battery pack when the number of impacts is equal to or less than a predetermined first reference value in the impact number comparison unit;
Wherein the battery pack impact protection device comprises:
The method of claim 7,
The second protection control unit,
A state measuring unit for measuring a current, a voltage and a temperature of the battery pack when the number of impacts exceeds a predetermined second reference value;
A protection control determining unit for comparing the current, voltage, and temperature measured by the state measuring unit with a predetermined protection control reference value to determine whether a protection control is required;
A permanent damage value comparing unit comparing the current, voltage, and temperature values of the battery pack with a predetermined permanent damage value when it is determined that the protection control is required by the protection control determining unit;
A protection fuse rub portion driving a protection fuse provided in a current input / output path of the battery pack when the current, voltage, and temperature of the battery pack are equal to or greater than a predetermined permanent damage value as a result of comparison in the permanent damage comparator; And
And a protection circuit for controlling the protection circuit provided with a switch for turning on / off the current of the battery pack when the current, voltage, and temperature of the battery pack are less than a predetermined permanent damage value, A control unit;
Wherein the battery pack impact protection device comprises:
The method of claim 7,
The impact sensing unit may include: an impact amount sensing unit that senses an impact amount of a shock generated in the battery pack; And accumulates the sensed amount of the impact.
The method of claim 8,
Wherein the protection circuit control unit comprises: a notification unit informing the user of performing the protection control when performing the protection control in the first protection control unit or the second protection control unit; The battery pack impact protection device further comprising:

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