Battery pack with shock sensing module

Abstract

The present invention relates to a battery pack equipped with an impact sensing module, and to a battery pack configured to detect the strength of an impact applied to the battery pack in stages by applying the structure of the impact sensing module to a battery management system (BMS) so as to control the battery management system (BMS) accordingly.

Description

[Technical field]

[0001] The present invention relates to a battery pack having an impact sensing module, and more particularly to a battery pack that can detect the strength of an impact in stages based on a change in voltage caused by connection of a resistor due to the impact, and control the operation of the pack according to the strength of the impact. [Background technology]

[0002] Batteries are widely used in a wide range of fields, including small electronic devices such as smartphones, laptops, and tablet PCs, as well as electric vehicles and energy storage systems (ESS).

[0003] A battery (pack) is generally made up of a number of unit cells assembled into an assembly, and a number of these assemblies are assembled together. The cell includes a positive electrode current collector, a separator, an active material, an electrolyte, an aluminum thin film layer, etc., and is structured so that charging and discharging can be performed by electrochemical reactions between the components.

[0004] In addition to the basic structure for charging and discharging, the battery further incorporates physical protection devices, various sensing means, firmware with accurate algorithms for estimating the state of charge (SOC), etc., from the cell through the assembly to become the battery.

[0005] If such a battery (pack) is subjected to physical impact, there is a risk of physical deformation of the pouch, housing, frame, etc. of the battery or the cells that make up the battery, which may lead to changes in the resistance and electrical characteristics of the battery or cells.

[0006] However, in the past, there was no means to detect an external impact on the battery pack and control or shut off the pack operation, which resulted in a problem that it was not possible to ensure the safety of the battery pack in the event of a physical impact.

[0007] The following documents are prior art related to the present invention. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Republic of Korea Patent No. 1053352 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been devised to solve the above-mentioned problems, and has an object to provide a battery pack configured to detect the strength of an impact applied to the battery pack in stages and control the BMS accordingly by applying the structure of an impact sensing module to a Battery Management System (BMS). [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides a battery pack comprising a BMS module and an impact sensing module for detecting the intensity of an impact applied to the battery pack in stages, the BMS module including a reference voltage source V ref and the reference voltage source V ref Reference resistor R connected to ref and the reference resistor R ref and a voltage measuring unit that measures a distributed voltage between the measuring resistor R0 and the voltage measuring unit. The impact sensing module is connected to the inside of the case of the battery pack via an elastic body. Non-conductive A partition wall and the reference resistor R refA measurement resistor R0 connected to the Non-conductive A battery pack is provided, comprising first and second resistors R1 and R2 connected to both ends of the partition via hinges, one end of which is connected to ground and the other end of which is connected to a measurement resistor R0.

[0011] The BMS module may further include a comparison and judgment unit that compares whether a predetermined impact arrival condition is satisfied based on the distribution voltage measurement value of the voltage measurement unit, and judges the degree of impact applied to the battery pack based on the comparison result, and a pack operation control unit that controls the operation of the battery pack in response to the judgment result of the comparison and judgment unit.

[0012] The other ends of the first resistor and the second resistor are arranged at a predetermined interval or less from the measurement resistor R0, and when vibration is applied to the case of the battery pack, the first and second resistors R1 and R2 come into contact with the measurement resistor R0, causing a fluctuation in the distribution voltage measurement value of the voltage measurement unit, and the interval d1 at which the first resistor R1 is arranged adjacent to the measurement resistor R0 is different from the interval d2 at which the second resistor R2 is arranged adjacent to the measurement resistor R0. Note that, since the interval d1 and the interval d2 are different from each other, the distribution voltage value measured by the voltage measurement unit differs depending on the degree of vibration generated in the battery pack.

[0013] At this time, the measurement resistor R0 is formed at a fixed position on a BMS board constituting a BMS module, and has contact parts with the first and second resistors R1 and R2, and the first and second resistors R1 and R2 are Non-conductive The resistor R1 and the resistor R2 are connected to the partition wall by an elastic body and have a positional fluctuation due to external vibration. The distributed voltage is measured as an instantaneous voltage when the first and second resistors R1 and R2 contact the measuring resistor R0, and is measured as different values ​​depending on the degree of external vibration.

[0014] In the battery pack, the comparison and judgment unit compares whether the distribution voltage measurement value of the voltage measurement unit is the same as a first reference voltage value, and if so, determines that the battery pack is in a state where no impact has been applied; compares whether the number of cycles at which the distribution voltage measurement value of the voltage measurement unit switches between the first reference voltage value and the second reference voltage value reaches a predetermined number of impacts, and if so, determines that the battery pack is in a state where a weak impact is being continuously applied; and compares whether the distribution voltage measurement value of the voltage measurement unit reaches a third reference voltage value, and if so, determines that the battery pack is in a state where a strong impact has been applied.

[0015] In addition, the present invention provides a method for detecting an external shock state in the above-mentioned battery pack, comprising providing a reference voltage source V ref Reference resistor R connected to ref and a measurement resistor R0 of an impact sensing module, the method comprising: a distribution voltage measurement step of measuring a distribution voltage at a connection point between the distribution voltage measurement step and a measurement resistor R0 of an impact sensing module; a shock arrival condition satisfaction comparison step of comparing whether a predetermined shock arrival condition is satisfied based on the distribution voltage value measured in the distribution voltage measurement step; and a shock state determination step of determining the degree of impact applied to the battery pack based on a comparison result in the shock arrival condition satisfaction comparison step.

[0016] The impact detection method for the battery pack may further include a pack operation control step of controlling the operation of the battery pack in response to a result of the judgment in the impact state judgment step, and the impact arrival condition satisfaction comparison step compares whether the measured distribution voltage value is the same as a first reference voltage value, compares whether the number of cycles at which the measured distribution voltage value switches between the first reference voltage value and the second reference voltage value has reached a predetermined number of impacts, and compares whether the measured distribution voltage value has reached a third reference voltage value.

[0017] In addition, the impact state determination step determines that the battery pack is in a state where no external impact has been applied to it if the measured distribution voltage value is the same as a first reference value as a result of the comparison in the impact arrival condition satisfaction comparison step, determines that the battery pack is in a state where a weak impact is being continuously applied to it if the number of cycles at which the measured distribution voltage value switches between the first reference voltage value and the second reference voltage value reaches a predetermined number of impacts, and determines that the battery pack is in a state where a strong impact has been applied to it if the measured distribution voltage value reaches a third reference voltage value. Effect of the Invention

[0018] The present invention provides improved safety against external shocks by detecting the strength of the shock in stages based on a change in voltage caused by connection of resistance due to the shock and controlling the operation of the battery pack according to the strength of the shock. [Brief description of the drawings]

[0019] [Figure 1] 1 is a schematic diagram of a battery pack according to an embodiment of the present invention; [Diagram 2] 2 is a diagram showing a configuration of an impact sensing module according to an embodiment of the present invention; [Diagram 3] FIG. 3 is a schematic circuit diagram of the shock sensing module of FIG. 2. [Figure 4] 11A and 11B are diagrams illustrating the operation of the shock sensing module when a weak shock is applied to the battery pack. [Diagram 5] 11A and 11B are diagrams illustrating the operation of the impact sensing module when a strong impact is applied to the battery pack. [Figure 6] FIG. 13 shows an example of voltage measurements when a strong shock is applied to the battery pack. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings so that a person having ordinary skill in the art to which the present invention pertains can easily carry out the present invention. However, the present invention can be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, in order to clearly explain the present invention, parts that are not related to the description are omitted, and similar parts are denoted by similar reference numerals throughout the specification.

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] 1. Battery pack according to the present invention FIG. 1 is a schematic diagram of a battery pack according to an embodiment of the present invention.

[0023] Referring to FIG. 1, a battery pack 10 of the present invention broadly includes a BMS module 100, a cell module 200, and an impact sensing module 300.

[0024] 1.1.100 BMS Modules

[0025] As shown in FIG. 1, the BMS module 100 of the present invention includes a reference voltage source V ref and the reference voltage source V ref Reference resistor R connected to ref and the reference resistor R ref At the connection point between the resistor pattern R0 and the shock sensing module 300, which will be described later, a distributed voltage V In and a voltage measuring unit 110 that measures the voltage, and may further include a control unit (not shown) which will be described later.

[0026] 1.2. Cell module 200

[0027] The cell module 200 may include one or more battery cells (not shown).

[0028] 1.3. Shock Sensing Module 300

[0029] FIG. 2 is a diagram showing a configuration of an impact sensing module according to an embodiment of the present invention.

[0030] The impact sensing module 300 is a component that can detect the strength of an impact applied to the battery pack 10 in stages, and may include the following components.

[0031] The impact sensing module 300 of the present invention may be formed on a board separate from the above-mentioned BMS module and disposed in another portion of the battery pack, or may be disposed together on the printed circuit board (PCB) on which the BMS module is formed.

[0032] 1.3.1. Non-conductive bulkhead 310

[0033] Non-conductive The partition 310 may be connected to the case of the battery pack 10 by an elastic body so that the partition 310 is displaced in response to vibration of the battery pack 10; or Non-conductive The partition wall 310 may be connected to the board on which it is formed by an elastic material.

[0034] Non-conductive As shown in FIG. 2, the partition wall 310 is formed in a shape that encloses a measurement resistor pattern R0, which will be described later.

[0035] Here, the elastic body may be realized by, for example, a spring having a restoring force.

[0036] 1.3.2. Measurement resistor pattern R0

[0037] The measurement resistor pattern R0 is Non-conductive The resistors are formed on the inner side of the partition wall 310 at a distance from each other, and one end of the resistors is connected to the reference resistor R ref is connected to.

[0038] 1.3.3. First and second resistors R1, R2

[0039] The first and second resistors R1 and R2 are Non-conductive The electrodes are connected to the ends of the partition wall 310, and one end of the electrodes is connected to the ground (GND). Non-conductive The resistor pattern R0 is connected to both ends of the bulkhead 310 via hinges 320, one end of which is connected to ground (GND) and the other end of which is disposed adjacent to the measurement resistor pattern R0.

[0040] 2, the other ends of the first resistor R1 and the second resistor R2 are arranged adjacent to the measurement resistor pattern R0 at a predetermined interval or less, but the interval at which the first resistor R1 is arranged adjacent to the measurement resistor pattern R0 and the interval at which the second resistor R2 is arranged adjacent to the measurement resistor pattern R0 are set to be different from each other. Due to this difference in the arrangement interval, when vibration is applied to the battery pack case due to an impact from outside the battery pack 10, the battery pack 10 fixed by the spring is prevented from being damaged. Non-conductive The partition wall 310 is displaced, and the first and second resistors R1 and R2 connected thereto come into contact with the measurement resistor pattern R0, so that the distributed voltage value V In This will result in fluctuations in the

[0041] The hinge 320 has a restoring force, and even if an external impact occurs, Non-conductive Even if a very large displacement occurs in the partition wall 310, the first and second resistances are mechanically Non-conductive This prevents the connection part with the partition wall 310 from being damaged. Non-conductiveThe restoring force of the hinge may be set so that the first and second resistors are separated from the measurement resistor pattern R0 or remain in contact with it when the partition 310 returns to its original position, and in such different cases, the determination of the shock level and the control of the operation of the battery pack, which will be described later, may be modified. For example, in some cases, the hinge 320 may be set so that the first and second resistors contact the measurement resistor pattern R0 for a while and then separate as a result of the occurrence of displacement, or so that the hinge 320 remains in contact with the measurement resistor pattern R0 for a predetermined time or more to provide a sufficient time for measuring the distribution voltage. Non-conductive The strength of the restoring force of the hinge may be set so that the displacement is returned with a time lag after the partition wall 310 returns. Non-conductive It is also possible to set the degree of restoring force of the hinge so that even if the partition wall 310 returns, the positions of the first and second resistances are not restored.

[0042] 3 is a schematic circuit diagram of the shock sensing module 300 of FIG. 2. Referring to FIG. 3, a reference resistor R ref The voltage measurement value V sensed by the voltage measurement unit 110 of the BMS module 100 due to the voltage division of the measurement resistor R0 is In is expressed by the following Equation 1.

[0043]

number

[0044] 1.4. Control section (not shown)

[0045] The control unit detects the distribution voltage measurement value V In Based on the result of the comparison, it is possible to compare whether a predetermined shock arrival condition is satisfied or not, and to determine the shock level based on the result of the comparison. In addition, the operation of the battery pack can be controlled according to the result of the determination.

[0046] 1.4.1.Comparative judgment part

[0047] The comparison and judgment unit can use the distribution voltage measurement value sensed by the voltage measurement unit 110 to compare whether the external impact applied to the current battery pack satisfies a predetermined impact arrival condition, and can judge the degree of the impact based on the fulfillment result.

[0048] <Case 1: No impact>

[0049] The comparison and determination unit compares whether the distribution voltage measured by the voltage measurement unit 110 is the same as the first reference voltage value, and if they are the same, determines that the battery pack is not subjected to any shock.

[0050] When the impact sensing module is in an operating state as shown in FIG. 2 and FIG. 3, the distribution voltage measurement value V In will have the same value as the first reference voltage value.

[0051] Here, the first reference voltage value may be a value calculated by the above-mentioned Equation 1.

[0052] <Second case: A weak impact is applied continuously>

[0053] The comparison and judgment unit counts the pulse cycles in which the distribution voltage measurement value of the voltage measurement unit 110 goes back and forth between the first reference voltage value and the second reference voltage value, and compares whether the counted number reaches a predetermined number of impacts. If it does, it determines that a weak impact is being continuously applied to the battery pack.

[0054] FIG. 4 is a diagram illustrating the operation of the shock sensing module when a weak shock is applied to the battery pack.

[0055] 4, as described above, the gap between the measurement resistor R0 and the first resistor R1 and the gap between the measurement resistor R0 and the second resistor R2 are arranged to be different from each other, so that even in a situation where the measurement resistor R0 and the first resistor R1 come into contact with each other due to a weak impact, the measurement resistor R0 and the second resistor R2 do not come into contact with each other. If this state is diagrammed as a circuit as shown in FIG. 4(b), when a weak impact is applied, the distribution voltage measurement value V sensed by the voltage measurement unit 110 is Inw If we calculate it, it is expressed by the following Equation 2.

[0056]

number

[0057] Due to continuous small shocks applied from the external environment, the measurement resistor R0 and the first resistor R1 may repeatedly come into contact with each other and then come into contact with each other, and the voltage level is also sensed as a pulse shape that goes back and forth between the first and second reference voltages in response to the shock. Using this principle, in one embodiment, the distributed voltage measurement value V of the voltage measurement unit 110 is In The voltage measuring unit 110 may compare the number of pulse cycles of switching between the first and second reference voltage values ​​to determine whether a predetermined number of shocks have occurred. In It is also possible to determine whether a weak impact is continuously applied to the battery pack by comparing whether the first reference voltage value is initially sensed as the same as the first reference voltage value and then sensed as the same as the second reference voltage value for a predetermined number of impacts.

[0058] Here, the second reference voltage value may be a value calculated by Equation 2 above.

[0059] <Case 3: Strong impact applied>

[0060] The comparison and judgment unit compares the distribution voltage measurement value V Inreaches a third reference voltage value, and if so, it is determined that the battery pack has been subjected to a strong impact.

[0061] FIG. 5 is a diagram illustrating the operation of the impact sensing module when a strong impact is applied to the battery pack.

[0062] Referring to Figure 5, a strong impact Non-conductive When the partition wall 310 is violently shaken, the measurement resistance R0 and the first and second resistances R 1、 R2 are both connected to each other. This is illustrated as a circuit diagram as shown in FIG. 5(b). The distribution voltage measurement value V Ins If we calculate it, it is expressed by the following Equation 3.

[0063]

number

[0064] In this case, V In、 V Inw Compared to V Ins The voltage at the output of the power supply becomes lower. When comparing the magnitudes of the three voltage values, they can be expressed in the form of a graph as shown in FIG.

[0065] 1.4.2. Pack operation control section

[0066] The pack operation control section can control the operation of the battery pack in accordance with the result of the judgment made by the comparison and judgment section.

[0067] If it is determined that the battery pack is in a normal state without any external impact, the battery pack can maintain normal operation.

[0068] On the other hand, if it is determined that a weak impact is being continuously applied as a result of the above judgment, a higher level of safety control operation can be performed compared to a general state without external impact.

[0069] Meanwhile, when it is determined that a strong impact is applied as a result of the determination, a safety control operation of a higher level can be performed compared to when a weak impact is continuously applied.

[0070] Such a control unit (not shown) can be realized by a normal BMS and a processor incorporated in the BMS module 100 described above, and is characterized by performing the characteristic functions of the present invention described above. In this case, the voltage measurement unit 110 described above can be disposed as one component of the BMS.

[0071] 2. Impact detection method for battery pack according to the present invention

[0072] The shock detection method for a battery pack according to an embodiment of the present invention provides a reference voltage source V ref , reference voltage source V ref Reference resistor R connected to ref and connected to the battery pack case by an elastic body so that displacement occurs when the battery pack 10 vibrates. Non-conductive Bulkhead 310, Non-conductive The resistors are formed on the inner side of the partition wall 310 at a distance from each other, and one end of the resistors is connected to the reference resistor R ref The measurement resistor pattern R0 is fixed on the board. Non-conductive The first and second resistors R are connected to both ends of the partition wall 310 via hinges 320, one end of which is disposed adjacent to the measurement resistor pattern R0 and the other end of which is connected to ground (GND). 1、 This can be achieved by applying the shock sensing module 300 with R2.

[0073] 2.1.Distribution voltage measurement steps

[0074] The distributed voltage measurement step provides a reference voltage source V ref and the reference voltage source V ref Reference resistor R connected to refand the measurement resistor pattern R0 of the impact sensing module. This step is performed by the voltage measurement unit 110 of the BMS module 100 described above.

[0075] 2.2. Comparison step for whether or not the impact arrival conditions are met

[0076] The shock arrival condition satisfaction comparison step is a step of comparing whether or not a predetermined shock arrival condition is satisfied based on the distribution voltage value measured in the distribution voltage measurement step.

[0077] <Case 1: No impact>

[0078] In a first case, a comparison may be made as to whether the measured distributed voltage value is the same as a first reference voltage value.

[0079] Here, the first reference voltage value may be a value calculated according to Equation 1 above.

[0080] <Second case: A weak impact is applied continuously>

[0081] In the second case, the number of cycles in which the measured distribution voltage value switches between the first reference voltage value and the second reference voltage value can be counted, and a comparison can be made as to whether the counted number reaches a predetermined number of impacts.

[0082] Meanwhile, in another embodiment, the measured distribution voltage value may be first sensed as being equal to a first reference voltage value, and then compared to see whether it is continuously sensed as being equal to a second reference voltage value for a predetermined number of impacts.

[0083] Here, the second reference voltage value may be a value calculated according to Equation 2 above.

[0084] <Case 3: Strong impact applied>

[0085] In a third case, a comparison can be made as to whether the measured distributed voltage value reaches a third reference voltage value.

[0086] Here, the third reference voltage value may be a value calculated according to Equation 3 above.

[0087] 2.3. Impact condition judgment step

[0088] In the impact state determination step, the strength of the impact applied to the battery pack can be determined based on the result of the comparison in the impact arrival condition satisfaction comparison step.

[0089] <Case 1: No external impact>

[0090] In the first case, if the measured distribution voltage value is equal to the first reference voltage value as a result of the comparison in the impact arrival condition satisfaction comparison step, it can be determined that the current battery pack is not subjected to an external impact.

[0091] <Second case: A weak impact is applied continuously>

[0092] In a second case, if the comparison result in the impact arrival condition satisfaction comparison step indicates that the number of cycles at which the measured distribution voltage value switches between the first reference voltage value and the second reference voltage value reaches a predetermined number of impacts, or if the number of times that the measured distribution voltage value is continuously sensed as the same value as the second reference voltage value after being initially sensed as the same value as the first reference voltage value reaches a predetermined number of impacts, it can be determined that the battery pack is currently in a state in which a weak impact is being continuously applied.

[0093] <Case 3: Strong impact applied>

[0094] In a third case, if the measured distribution voltage value reaches a third reference voltage value as a result of the comparison in the impact arrival condition satisfaction comparison step, it can be determined that a strong impact has been applied to the battery pack.

[0095] The technical principles for making the above judgment have already been described above, and therefore a detailed description thereof will be omitted.

[0096] 2.4.Puck Operation Control Steps

[0097] The pack operation control step is a step of controlling the operation of the battery pack in response to the result of the determination in the impact state determination step.

[0098] If it is determined that the battery pack is in a normal state without any external impact, the normal operation of the battery pack can be maintained and controlled.

[0099] On the other hand, if it is determined that the battery pack is in a state where a weak impact is continuously applied to the battery pack as a result of the judgment, the battery pack may be controlled to perform a higher level of safety control operation compared to when there is no external impact.

[0100] On the other hand, if it is determined that a strong impact has been applied to the battery pack as a result of the judgment, the battery pack may be controlled to perform a higher level of safety control operation compared to when a weak impact is being continuously applied.

[0101] That is, the level of the safety control operation is gradually increased according to the degree of impact applied to the battery pack.

[0102] Meanwhile, although the technical idea of ​​the present invention has been specifically described based on the above embodiment, it should be noted that the above embodiment is for the purpose of explanation and not for the purpose of limiting the present invention. It should be understood by those skilled in the art that various embodiments are possible within the scope of the technical idea of ​​the present invention.

[0103] The reference numerals and names of the drawings used in the present invention are as follows: [Explanation of symbols]

[0104] 10. Battery pack 100…BMS module 110…Voltage measurement section 200…cell module 300...Impact sensing module 310… Non-conductive bulkhead 320…hinge V ref …Reference voltage source R ref …Reference resistance R0: Measurement resistance R1…first resistor R2: Second resistor

Claims

1. In the battery pack, a battery management system (BMS) module; an impact sensing module for detecting the strength of an impact applied to the battery pack in stages; Equipped with The BMS module includes: Reference voltage source for shock detection (V ｒｅｆ )and, The reference voltage source (V ｒｅｆ ) connected to a reference resistor (R ｒｅｆ )and, The reference resistance (Rref) and the measurement resistance (R ０ A voltage measuring unit for measuring a distribution voltage between the Equipped with The impact sensing module includes: a non-conductive partition wall connected to an inner side of the case of the battery pack via an elastic body; the measurement resistor (R0) connected to the reference resistor (Rref); First and second resistors (R １ , R ２ )and, Equipped with The other ends of the first resistor and the second resistor are disposed apart from the measurement resistor (R0) by a predetermined interval or less, The voltage measurement unit is configured to measure a variation in a distribution voltage measurement value of the voltage measurement unit when at least one of the first and second resistors (R1, R2) contacts the measurement resistor (R0) when vibration is applied to the case of the battery pack. Battery pack.

2. The BMS module includes: a comparison and judgment unit that compares whether a predetermined shock arrival condition is satisfied based on the distribution voltage measurement value of the voltage measurement unit, and judges the degree of the shock applied to the battery pack based on the comparison result; a pack operation control unit that controls an operation of the battery pack in response to a result of the judgment by the comparison and judgment unit; 10. The battery pack of claim 1, further comprising:

3. The first resistor (R １ The distance (d1) at which the second resistor (R ２ 2. The battery pack according to claim 1, wherein the intervals (d2) of the measuring resistors (R0) are different from each other.

4. 4. The battery pack according to claim 3, wherein the distance (d1) and the distance (d2) are different from each other, so that the distribution voltage value measured by the voltage measuring unit differs depending on the degree of vibration occurring in the battery pack.

5. The measurement resistor (R0) is formed at a fixed position on a BMS board constituting the BMS module, and the first and second resistors (R １ , R ２ ) contact portion, The first and second resistors (R １ , R ２ 5. The battery pack according to claim 4, wherein the separator is connected to the non-conductive partition by an elastic body and has a positional variation due to external vibration.

6. The distribution voltage is The first and second resistors (R １ , R ２ ) is measured as the instantaneous voltage at which the measuring resistor (R0) is contacted, The battery pack according to claim 5 , wherein the measured values ​​are different from each other depending on the degree of external vibration.

7. The comparison and determination unit is comparing whether the distribution voltage measurement value of the voltage measurement unit is equal to a first reference voltage value, and if the distribution voltage measurement value is equal to the first reference voltage value, determining that the battery pack is in a state where no shock is applied thereto; comparing whether or not the number of cycles at which the distribution voltage measurement value of the voltage measurement unit switches between a first reference voltage value and a second reference voltage value reaches a predetermined number of shocks, and if so, determining that a weak shock is being continuously applied to the battery pack; 3. The battery pack according to claim 2, further comprising: a voltage measuring unit for measuring a voltage difference between the first and second reference voltages; a voltage measuring unit for measuring a voltage difference between the first and second reference voltages;

8. 8. A method for sensing an external shock condition in a battery pack according to any one of claims 1 to 7, comprising: A reference voltage source (V) for implementing shock detection on the battery management system (BMS) board. ｒｅｆ ) connected to a reference resistor (R ｒｅｆ ) and the measured resistance of the shock sensing module (R ０ a distribution voltage measuring step of measuring a distribution voltage at a connection point between the a shock reaching condition satisfaction comparison step of comparing whether or not a predetermined shock reaching condition is satisfied based on the distribution voltage value measured in the distribution voltage measurement step; an impact condition determination step of determining a degree of an impact applied to the battery pack based on a result of the comparison in the impact arrival condition satisfaction comparison step; A shock sensing method for a battery pack, comprising:

9. 9. The method for detecting an impact on a battery pack according to claim 8, further comprising a pack operation control step of controlling an operation of the battery pack in response to a result of the determination in the impact state determination step.

10. The impact arrival condition satisfaction comparison step includes: comparing whether the measured divided voltage value is equal to a first reference voltage value; comparing whether the number of cycles in which the measured distributed voltage value switches between a first reference voltage value and a second reference voltage value reaches a predetermined number of impacts; 9. The method of claim 8, further comprising comparing whether the measured distributed voltage value reaches a third reference voltage value.

11. The impact state determination step includes: As a result of the comparison in the impact arrival condition satisfaction comparison step, If the measured distribution voltage value is equal to a first reference value, it is determined that the battery pack is not subjected to an external impact; When the number of cycles in which the measured distribution voltage value switches between the first reference voltage value and the second reference voltage value reaches a predetermined number of shocks, it is determined that the battery pack is in a state in which a weak shock is continuously applied to the battery pack; 11. The method of claim 10, further comprising determining that a strong impact has been applied to the battery pack when the measured distributed voltage value reaches a third reference voltage value.

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