Collision switch circuit and collision detection system including same

Abstract

The invention provides a collision switch circuit and a collision detection system including the same. The collision switch circuit includes: a first switch including: an emitter supplied with a positive terminal voltage of a battery pack; a collector to which a collision output signal is output; the base electrode is connected with the first node; a first resistor and a capacitor connected in parallel between the emitter and the first node; and a diode including an anode configured to be supplied with a crash input signal from a crash sensor and a cathode connected with the first node.

Description

Technical Field

[0001] Aspects of embodiments of the present disclosure relate to a collision switch circuit and a collision detection system including the collision switch circuit. Background Art

[0002] In the event of a vehicle accident such as a collision, it may be desirable to operate a safety function related to the collision. To operate the safety function, a collision signal detected for the collision is transmitted to a safety device, and each safety device transmits the collision signal to a main control unit (MCU) such as a battery management system (BMS), thereby activating the safety function.

[0003] Furthermore, to further protect the lives and safety of vehicle occupants, it may be desirable for the safety device to send a crash signal from a detected crash to the MCU as quickly as possible.

[0004] The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art. Summary of the invention

[0005] Chatter or noise may occur in the crash signal. As such, the safety device that sends the crash signal to the safety-related circuit or MCU may include a comparator or other logic gate with a hysteresis characteristic.

[0006] Embodiments of the present disclosure are directed to a collision switch circuit and a collision detection system including the collision switch circuit, which can detect a collision signal even if a problem occurs in a power supply of a comparator or other logic gates.

[0007] Embodiments of the present disclosure are directed to a collision switch circuit that can transmit a collision signal by operating without a separate power supply, and a collision detection system including the collision switch circuit.

[0008] According to one or more embodiments of the present disclosure, a collision switch circuit includes: a first switch, including: an emitter, configured to be supplied with a positive terminal voltage of a battery pack; a collector, configured to output a collision output signal; and a base, connected to a first node; a first resistor and a capacitor, connected in parallel to each other between the emitter and the first node; and a diode, including an anode and a cathode, the anode being configured to be supplied with a collision input signal from a collision sensor, and the cathode being connected to the first node.

[0009] In an embodiment, the first switch may be configured to be turned on when the collision input signal reaches a reference voltage level from a voltage level indicating a normal state for more than a reference time.

[0010] In an embodiment, the reference time may be determined by a resistance value of the first resistor and a capacitance value of the capacitor.

[0011] In an embodiment, the diode may be a Zener diode having a breakdown voltage value; and the collision switch circuit may also include a second resistor connected between the cathode of the diode and the first node, and the reference voltage level may be determined by the resistance value of the first resistor, the resistance value of the second resistor and the breakdown voltage value.

[0012] In an embodiment, the collision switch circuit may also include: a second switch, including: a collector configured to output a collision conversion signal; an emitter connected to ground; and a base connected to a second node; a third resistor connected between the collector of the first switch and the second node; a fourth resistor connected between the second node and ground; and a fifth resistor connected between a driving voltage and the collector of the second switch.

[0013] According to one or more embodiments of the present disclosure, a collision detection system includes: a collision switch circuit, configured to output a collision output signal when a collision input signal indicating a collision detected by a collision sensor reaches a reference voltage level from a voltage level indicating a normal state for more than a reference time; and a safety-related circuit, configured to be turned on or off based on the collision output signal, and to perform a protection operation corresponding to the collision based on the collision output signal.

[0014] In an embodiment, the collision switch circuit may include: a first switch, including: an emitter, configured to be supplied with a positive terminal voltage of a battery pack; a collector, configured to output a collision output signal; and a base, connected to a first node; a first resistor and a capacitor, connected in parallel to each other between the emitter and the first node; and a diode, including an anode and a cathode, the anode being configured to be supplied with a collision input signal from a collision sensor, and the cathode being connected to the first node.

[0015] In an embodiment, the reference time may be determined by a resistance value of the first resistor and a capacitance value of the capacitor.

[0016] In an embodiment, the diode may be a Zener diode having a breakdown voltage; and the collision switch circuit may also include a second resistor connected between the cathode of the diode and the first node, and the reference voltage level may be determined by the resistance value of the first resistor, the resistance value of the second resistor and the value of the breakdown voltage.

[0017] In an embodiment, the collision detection system may further include: a main control unit (MCU) configured to control the safety-related circuit; and a level converter configured to output a collision conversion signal to the main control unit, wherein the collision conversion signal is generated by changing the level of the collision output signal according to a driving voltage.

[0018] In an embodiment, the level converter may include: a second switch including: a collector configured to output a collision conversion signal; an emitter connected to ground; and a base connected to a second node; a third resistor connected between the collector of the first switch and the second node; a fourth resistor connected between the second node and ground; and a fifth resistor connected between the drive voltage and the collector of the second switch.

[0019] According to one or more embodiments of the present disclosure, even when a power problem occurs by using a collision switch circuit that can operate without a separate power supply, a safety-related circuit can be controlled by detecting a collision signal.

[0020] According to one or more embodiments of the present disclosure, malfunctions may be prevented or substantially prevented by enhancing tolerance to ripple noise and tolerance to chatter noise.

[0021] According to one or more embodiments of the present disclosure, resistance values, capacitance values, etc. may be used to set high and low levels and implement hysteresis for switches such as comparators or other logic gates. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other aspects and features of the present disclosure will be more clearly understood from the following detailed description of illustrative, non-limiting embodiments with reference to the accompanying drawings.

[0023] Figure 1 is a block diagram of a collision detection system according to an embodiment.

[0024] Figure 2 yes Figure 1 The circuit diagram of the collision switch circuit is shown in .

[0025] Figure 3 yes Figure 2 A circuit diagram of a collision switch circuit includes a level conversion part.

[0026] Figure 4 is a flow chart of a collision signal output method according to an embodiment.

[0027] Figure 5 is a graph showing levels of a collision output signal and a collision conversion signal according to ripple noise.

[0028] Figures 6 to 10Experimental graphs according to one or more embodiments are shown. DETAILED DESCRIPTION

[0029] Hereinafter, the embodiments will be described in more detail with reference to the accompanying drawings, wherein the same reference numerals represent the same elements throughout. However, the present disclosure may be implemented in various different forms and should not be construed as being limited to the embodiments shown herein. More specifically, these embodiments are provided as examples so that the present disclosure will be thorough and complete, and the aspects and features of the present disclosure will be fully conveyed to those skilled in the art. Therefore, processes, elements and techniques that are unnecessary for a person of ordinary skill in the art to fully understand the aspects and features of the present disclosure may not be described. Unless otherwise stated, throughout the drawings and written descriptions, the same reference numerals represent the same elements, and therefore their redundant descriptions may not be repeated.

[0030] When a specific embodiment can be implemented differently, the specific process order may be different from the described order. For example, two processes described in succession may be performed simultaneously or substantially simultaneously, or may be performed in the reverse order of the described order.

[0031] It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the spirit and scope of the present disclosure, the first element, first component, first region, first layer or first part described below may be referred to as the second element, second component, second region, second layer or second part.

[0032] It should be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it may be directly "on," "connected to," or "coupled to" another element or layer, or one or more intervening elements or layers may be present. Similarly, when a layer, region, or element is referred to as being "electrically connected to" another layer, region, or element, it may be directly electrically connected to the other layer, region, or element, and / or may be indirectly electrically connected to the other layer, region, or element via one or more intervening layers, regions, or elements therebetween. Furthermore, it should be understood that when an element or layer is referred to as being "between" two elements or layers, it may be the only element or layer between the two elements or layers, or one or more intervening elements or layers may also be present.

[0033] The terms used herein are for the purpose of describing a particular embodiment and are not intended to limit the present disclosure. As used herein, unless the context clearly states otherwise, the singular form is intended to also include the plural form. It will be further understood that when used in this specification, the terms "include", "comprise" and "have" specify the presence of the features, quantities, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, components and / or their groups. As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items. For example, the statement "A and / or B" means A, B or A and B. Statements such as "at least one of ..." modify the entire element list when it is after the element list, rather than modifying the individual elements in the list. For example, the statements "at least one of a, b or c", "at least one of a, b and c" and "at least one selected from the group consisting of a, b and c" represent only a, only b, only c, both a and b, both a and c, both b and c, all a, b and c, or variations thereof.

[0034] As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation rather than terms of degree, and are intended to take into account the inherent variation in measurements or calculations that one of ordinary skill in the art would recognize. In addition, when describing embodiments of the present disclosure, the use of "may" refers to "one or more embodiments of the present disclosure." As used herein, the term "use" may be considered synonymous with the term "utilizing."

[0035] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will be further understood that, unless expressly defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and / or this specification, and should not be interpreted in an idealized or overly formal sense.

[0036] In the component according to the embodiment of the present disclosure, a program implemented as a set of instruction words that implements a control algorithm necessary for controlling other configurations may be installed in a configuration that controls another configuration under specific control conditions. The control component may generate output data by processing input data and stored data according to the installed program. The control component may include a non-volatile memory for storing the program and a memory for storing data.

[0037] Figure 1 is a block diagram of a collision detection system according to an embodiment.

[0038] Reference Figure 1The collision detection system 1 may include a collision switch circuit 10 , a safety-related circuit 20 , a collision sensor 30 , and a main controller (MCU) 40 .

[0039] The collision switch circuit 10 may receive a collision input signal CRS_IN and generate a collision output signal CRS_OUT corresponding to the collision input signal CRS_IN, and may generate a collision conversion signal CRS_SHFT corresponding to the collision output signal CRS_OUT by using a positive terminal voltage B+ of the battery pack as a power source.

[0040] The safety-related circuit 20 may be a circuit that is controlled to be turned on or off according to the collision output signal CRS_OUT, and may perform a protection operation. For example, the safety-related circuit 20 may be a main connector such as a relay connected to a battery pack power source. The protection operation may refer to a control operation for protecting an external device connected to a battery system including a battery pack and / or a battery system in response to a collision.

[0041] The collision sensor 30 may detect a collision, generate a collision input signal CRS_IN indicating the detected collision, and input the collision input signal CRS_IN to the collision switch circuit 10 .

[0042] The MCU 40 may recognize that a collision has been detected based on the collision conversion signal CRS_SHFT, and control the safety-related circuit 20 to perform a protection operation corresponding to the collision.

[0043] The collision switch circuit 10 may transmit the collision output signal CRS_OUT to the safety-related circuit 20 , and may generate a collision conversion signal CRS_SHFT to transmit the signal to the MCU 40 .

[0044] In other words, the collision switch circuit 10 controls the safety-related circuit 20 in a hardware manner through the collision output signal CRS_OUT, sends the collision conversion signal CRS_SHFT to the MCU 40 , and controls the safety-related circuit 20 in a software manner through the MCU 40 .

[0045] In addition, Figure 1 In the embodiment, the MCU 40 is shown as controlling the safety-related circuit 20, but the present disclosure is not limited thereto. In some embodiments, in addition to controlling the safety-related circuit 20, the MCU 40 may also perform various other control operations related to battery safety based on the collision conversion signal CRS_SHFT. For example, the control operation related to battery safety may include a notification operation for notifying a user that a collision has been detected.

[0046] Figure 2 yes Figure 1 The circuit diagram of the collision switch circuit is shown.

[0047] Reference Figure 2 , the collision switch circuit 10 may include a main switch 110 .

[0048] The main switch 110 may remove noise from the collision input signal CRS_IN and may add a hysteresis characteristic to output the collision output signal CRS_OUT. Here, the noise may be inrush noise, ripple noise, chattering noise, etc.

[0049] The main switch 110 may send the collision output signal CRS_OUT to the safety-related circuit 20 .

[0050] The collision input signal CRS_IN may use the positive terminal voltage B+ of the battery pack of the vehicle as a source (e.g., a power source). The off-level of the collision input signal CRS_IN may be a high level within a range (e.g., a predetermined range) from the positive terminal voltage B+ of the battery pack, and the on-level of the collision input signal CRS_IN may be a low level within a predetermined range from the ground voltage.

[0051] The off-level of the collision output signal CRS_OUT may be a low level within a predetermined range from a ground voltage, and the on-level of the collision output signal CRS_OUT may be a high level within a predetermined range from a positive terminal voltage B+ of the battery pack.

[0052] The main switch 110 may be a low active circuit that performs a switching operation at a low level. When the collision input signal CRS_IN is at a high level, the main switch 110 may be considered to be in a normal state, and when the collision input signal CRS_IN is at a low level, the main switch 110 may indicate that a collision has occurred, and thus, may perform a switching operation.

[0053] Hereinafter, the main switch 110 may be described in more detail in the context of a low active circuit as a representative example, but the present disclosure is not limited thereto.

[0054] The main switch 110 may include a capacitor C1 , two resistors R1 and R2 , a diode D1 , and a switch Q1 .

[0055] The diode D1 may be a Zener diode. The diode D1 may set an operating voltage of the switch Q1. The operating voltage of the switch Q1 may be a value considering a breakdown voltage value of the diode D1 and a base voltage of the switch Q1 according to a positive terminal voltage B+ of the battery pack.

[0056] The switch Q1 may recognize a range from a voltage exceeding a threshold voltage value (taking into account the breakdown voltage of the diode (D1) and the base voltage of the switch Q1) to the positive terminal voltage (B+) of the battery pack as a high level, which may be a turn-off level. In addition, the switch Q1 may recognize a range below the threshold voltage value (taking into account the breakdown voltage of the diode D1 and the base voltage of the switch Q1 according to the positive terminal voltage B+ of the battery pack) as a low level, which may be a turn-on level, and may perform a switching operation.

[0057] For example, when the positive terminal voltage B+ of the battery pack is 12 V, the breakdown voltage of the diode D1 may be 6.2 V, and the base voltage of the switch Q1 may be 0.7 V, so that the operating voltage of the switch Q1 may be 5.1 V (e.g., 12-0.7-6.2=5.1). In this case, although the positive terminal voltage B+ of the battery pack is 12 V, the switch Q1 may recognize a voltage of 5.1 V or higher as a high level.

[0058] Therefore, even when the voltage indicated by the collision input signal CRS_IN actually drops to a certain extent, the switch Q1 may recognize it as a high level. The switch Q1 may operate according to an operating voltage range determined based on the breakdown voltage of the diode D1.

[0059] The switch Q1 may be a PNP transistor.

[0060] The positive terminal voltage B+ of the battery pack may be provided to the emitter of the switch Q1. The emitter of the switch Q1 may be connected to one end of the capacitor C1 and one end of the resistor R1. The base of the switch Q1 may be connected to the node N1. The node N1 may be connected to the other end of the capacitor C1 and one end of the resistor R2. Therefore, the capacitor C1 and the resistor R1 may be connected in parallel to each other between the emitter of the switch Q1 and the node N1. The collector of the switch Q1 may output the collision output signal CRS_OUT.

[0061] The collision input signal CRS_IN may be provided to an anode of the diode D1, and a cathode of the diode D1 may be connected to the node N1. The cathode of the diode D1 may be connected to the other end of the resistor R2, one end of which is connected to the node N1.

[0062] The capacitor C1 may form ripple noise and hysteresis in the main switch 110. In addition, the capacitor C1 may ensure surge noise tolerance and hysteresis with the two resistors R1 and R2.

[0063] The capacitor C1 may accumulate energy corresponding to a voltage difference between a positive terminal voltage B+ of the battery pack and the collision input signal CRS_IN.

[0064] The off level of the collision input signal CRS_IN may correspond to the value of the positive terminal voltage B+ of the battery pack, and therefore, there may be little or no voltage difference, but if the collision input signal CRS_IN has an on level, a voltage difference between the positive terminal voltage B+ of the battery pack and the collision input signal CRS_IN may be generated.

[0065] Therefore, at the beginning when the voltage value indicated by the collision input signal CRS_IN changes from an off level to an on level, since current flows through the capacitor C1 and the resistor R2 , the switch Q1 may not perform a switching operation.

[0066] When the voltage value indicated by the collision input signal CRS_IN changes and remains in this state for more than a reference time (e.g., a predetermined reference time), current flows through the resistor R1 and the base of the switch Q1, thereby allowing the switch Q1 to perform a switching operation. Here, the reference time may be a value determined by a time constant according to the resistance value of the resistor R1 and the capacitance value of the capacitor C1.

[0067] As such, the switch Q1 may not perform a switching operation with respect to the ripple noise that may occur and disappear within the reference time according to the characteristics of the capacitor C1 .

[0068] The reference time may be changed by a time constant according to the resistance value of the resistor R1 and the capacitance value of the capacitor C1.

[0069] The on-operation voltage when the switch Q1 is turned on can be determined by the resistance value of the resistor R1, the capacitance value of the capacitor C1, and the breakdown voltage value of the diode D1. For example, the reference voltage can be determined by a time constant according to the resistance value of the resistor R1 and the capacitance value of the capacitor C1 and the breakdown voltage value of the diode D1.

[0070] The turn-off operating voltage when the switch Q1 is turned off may also be determined by the resistance value of the resistor R1 , the capacitance value of the capacitor C1 , and the breakdown voltage value of the diode D1 .

[0071] When the collision input signal CRS_IN reaches the reference voltage from a voltage exceeding the reference voltage, the switch Q1 may be turned on. The main switch 110 may also have a hysteresis characteristic because the time when the collision input signal CRS_IN reaches the reference voltage is different from the time when the voltage value indicated by the collision input signal CRS_IN is outside the predetermined voltage range based on the off level.

[0072] When the collision input signal CRS_IN reaches the off operation voltage from a voltage lower than the off operation voltage, the switch Q1 is turned off, and the time when the collision input signal CRS_IN reaches the off operation voltage may be different from the time when the voltage value indicated by the collision input signal CRS_IN is outside the voltage range (e.g., a predetermined voltage range) based on the conduction level.

[0073] Because the main switch 110 may be an active low circuit, a voltage level of each of the reference voltage and the off operation voltage may be lower than a high level as an off level of the collision input signal CRS_IN and higher than a low level as an on level of the collision input signal CRS_IN.

[0074] The level of the reference voltage and the level of the off operation voltage may be variously determined according to the resistance value of each of the two resistors R1 and R2 and the breakdown voltage value of the diode D1 .

[0075] The two resistors R1 and R2 may set an operating current for a switching operation of the switch Q1. The main switch 110 may set a noise tolerance level and a hysteresis value through a combination of the two resistors R1 and R2 and the capacitor C1.

[0076] The main switch 110 may fine-tune the operating voltage value of the switch Q1 determined by the breakdown voltage of the diode D1 according to the time constant of the two resistors R1 and R2 .

[0077] For example, when the resistance value of each of the two resistors R1 and R2 increases, the current flowing through the two resistors R1 and R2 decreases, and therefore, the switch Q1 can perform a switching operation at a voltage level when the voltage of the collision input signal CRS_IN is lower than the operating voltage level set by the diode D1 by a certain degree (for example, a predetermined degree).

[0078] Figure 3 yes Figure 2 A circuit diagram of a collision switch circuit includes a level conversion part.

[0079] Refer to below Figure 3 , redundant descriptions of components that are identical or substantially identical to the above components may not be repeated.

[0080] Reference Figure 3 The collision detection system 1_1 according to the embodiment may include a collision switch circuit 10_1 . The collision switch circuit 10_1 may include a main switch 110 and a level converter 120 .

[0081] Figure 3 The collision detection system 11 may be Figure 1 An example of a collision detection system 1 is shown.

[0082] The main switch 110 may receive the collision input signal CRS_IN and generate a collision output signal CRS_OUT corresponding to the collision input signal CRS_IN by using a positive terminal voltage B+ of the battery pack as a power source.

[0083] The main switch 110 may send the collision output signal CRS_OUT to the safety-related circuit 20 .

[0084] The level converter 120 may output a collision conversion signal CRS_SHFT that changes the level of the collision output signal CRS_OUT according to a driving voltage (eg, a predetermined driving voltage) Vd based on the collision output signal CRS_OUT. The driving voltage Vd may be the same or substantially the same as the level of the collision input signal CRS_IN.

[0085] The driving voltage Vd may be a value that allows an operation level of the collision switching signal CRS_SHFT to be transmitted to a time-to-live (TTL) signal level element of the MCU 40. For example, the driving voltage Vd may be 3.3V or 5V.

[0086] The level converter 120 may transmit the collision conversion signal CRS_SHFT to the MCU 40 .

[0087] The level converter 120 may include three resistors R3 to R5 and a switch Q2 .

[0088] The switch Q2 may be an NPN transistor.

[0089] The collector of the switch Q2 outputs the collision switching signal CRS_SHFT, the base of the switch Q2 is connected to the node N2, and the emitter of the switch Q2 may be connected to the ground. The resistor R3 may be connected between the collector of the switch Q1 and the node N2. The resistor R4 may be connected between the node N2 and the ground. The collision output signal CRS_OUT may be provided from the collector of the switch Q1 to one end of the resistor R3.

[0090] The resistor R5 may be connected between the driving voltage Vd and the collector of the switch Q2.

[0091] When the collision output signal CRS_OUT is at an off level, the switch Q2 may output an off-level collision conversion signal CRS_SHFT without being turned on in an off state. The off level of the collision conversion signal CRS_SHFT may be a high level within a range (eg, a predetermined range) from the driving voltage Vd.

[0092] When the collision output signal CRS_OUT changes from the off level to the on level, the switch Q2 is turned on to output the collision conversion signal CRS_SHFT at the on level. The on level of the collision conversion signal CRS_SHFT may be a low level within a range (eg, a predetermined range) from the ground voltage.

[0093] Figure 4 is a flow chart of a collision signal output method according to an embodiment.

[0094] Refer to below Figure 4, redundant descriptions of components that are identical or substantially identical to the above components may not be repeated.

[0095] Reference Figure 4 , the switch Q1 may be in an off state (S100).

[0096] The collision sensor 30 may detect the collision ( S200 ).

[0097] When the collision sensor 30 starts to detect a collision, the collision input signal CRS_IN may deviate from a high level indicating a normal state by exceeding a predetermined range. The main switch 110 may remove noise from the collision input signal CRS_IN and generate a collision output signal CRS_OUT by forming a hysteresis.

[0098] The switch Q1 may be differently operated according to whether the collision input signal CRS_IN reaches a reference voltage level from a high level as a turn-off level within a reference time ( S300 ).

[0099] The switch Q1 may remove noise from the collision input signal CRS_IN, form hysteresis, and then output the collision output signal CRS_OUT.

[0100] The reference time may be determined according to a resistance value of the resistor R1 and a capacitance value of the capacitor C1 included in the main switch 110 .

[0101] When the collision input signal CRS_IN does not reach the reference voltage level within the reference time (e.g., No at S300), the switch Q1 may not perform a switching operation, and may continue to monitor the collision input signal CRS_IN (e.g., S300 may be repeated). In this way, according to the characteristics of the capacitor C1, the switch Q1 may not perform a switching operation due to ripple noise in which the collision input signal CRS_IN returns to a high level again within the reference time.

[0102] When the collision input signal CRS_IN reaches the reference voltage level for more than a reference time (eg, YES at S300 ), the switch Q1 may be turned on ( S400 ).

[0103] When the collision input signal CRS_IN decreases from a voltage exceeding a reference voltage to less than a reference voltage by a hysteresis characteristic according to two resistors R1 and R2 and a capacitor C1 , the switch Q1 may be turned on.

[0104] When the switch Q1 is turned on, the collector of the switch Q1 may output a collision output signal CRS_OUT of an on level.

[0105] When the collision output signal CRS_OUT changes from a low level (which is an off level) to a high level (which is an on level), the switch Q2 is turned on ( S500 ), and thus the collision conversion signal CRS_SHFT may change from a high level (which is an off level) to a low level (which is an on level).

[0106] After the switch Q2 is turned on, the collision detected by the collision sensor 30 may be terminated ( S600 ).

[0107] When the collision detected by the collision sensor 30 ends, it may be determined that the voltage value represented by the collision input signal CRS_IN increases from a low level as a turn-on level to an amount exceeding a predetermined voltage range.

[0108] When the collision input signal CRS_IN reaches a turn-off operation voltage level from a low level, which is a turn-on level, the switch Q1 may be turned off ( S700 ).

[0109] When the switch Q1 is turned off, the collector of the switch Q1 may output a low-level collision output signal CRS_OUT.

[0110] When the collision output signal CRS_OUT changes from a high level (which is an on level) to a low level (which is an off level), the switch Q2 is turned off ( S800 ), and the collision conversion signal CRS_SHFT may change from a low level (which is an on level) to a high level (which is an off level).

[0111] In the above reference Figure 4 In the described method, the collision output signal CRS_OUT output from the main switch 110 may be input to the safety-related circuit 20, and the collision conversion signal CRS_SHFT output from the level converter 120 may be input to the MCU 40. The safety-related circuit 20 may be turned on or off based on the collision output signal CRS_OUT to perform a protection operation. The MCU 40 recognizes that a collision is detected based on the collision conversion signal CRS_SHFT, and may perform a corresponding protection operation.

[0112] Figure 5 is a graph showing levels of a collision output signal and a collision conversion signal according to ripple noise.

[0113] Reference Figure 5 , during the time period from time t1 to time t2, ripple noise may be included in the collision input signal CRS_IN. In this case, the time period from time t1 to time t2 may be within the reference time period, and thus, the switch Q1 of the main switch 110 may not be turned on to output the collision output signal CRS_OUT of the off level. The voltage level indicated by the collision output signal CRS_OUT of the off level may be within a predetermined range starting from the level of the ground voltage.

[0114] The level converter 120 may output an off-level collision conversion signal CRS_SHFT based on the collision output signal CRS_OUT. The voltage level indicated by the off-level collision conversion signal CRS_SHFT may be Figure 3 The level of the driving voltage Vd shown starts within a range (eg, a predetermined range).

[0115] In the following, reference will be made to Figures 6 to 10 The variation of the reference voltage according to the resistance values ​​of the two resistors R1 and R2 is described in more detail.

[0116] Figures 6 to 10 Experimental graphs according to one or more embodiments are shown.

[0117] exist Figures 6 to 10 In FIG. 5 , it is assumed that the capacitance of the capacitor C1 is 47 nF, the switch Q1 is a transistor, the diode D1 is a Zener diode with a breakdown voltage of 6.2 V, and the driving voltage Vd is 3.3 V.

[0118] exist Figure 6 In the experimental example of , when the resistance value of each of the two resistors R1 and R2 is 4.3 kΩ, the reference voltage can be derived.

[0119] Reference Figure 6 When the time is 0ms, the collision input signal CRS_IN is at a high level (which is the off level), and the collision output signal CRS_OUT is at a low level (which is the off level). The off level of the collision input signal CRS_IN is 12V, corresponding to the positive terminal voltage B+ of the battery pack.

[0120] When the collision input signal CRS_IN reaches the reference voltage at 11 ms after decreasing from 5 ms, the collision output signal CRS_OUT becomes a high level (which is a turn-on level).

[0121] The conduction level of the collision output signal CRS_OUT is 12V corresponding to the positive terminal voltage B+ of the battery pack. Figure 6 In the experimental example, the reference voltage is 4.7V.

[0122] When the collision output signal CRS_OUT changes from a low level to a high level, the collision switching signal CRS_SHFT changes to a low level (which is a turn-on level).

[0123] In addition, when the collision input signal CRS_IN reaches the off operation voltage at 26.5 ms after increasing from 22.5 ms, the collision output signal CRS_OUT changes to a low level (which is a off level). Figure 6In the experimental example, the shutdown operation voltage is 5V.

[0124] When the collision output signal CRS_OUT changes from a high level to a low level, the collision switching signal CRS_SHFT changes to a high level (which is an off level). The off level of the collision switching signal CRS_SHFT is 3.3V corresponding to the driving voltage Vd.

[0125] exist Figure 7 In the experimental example of FIG. 1 , the reference voltage can be derived when the resistance value of the two resistors R1 and R2 is 10 kΩ.

[0126] Reference Figure 7 , when the time is 0 ms, the collision input signal CRS_IN is at a high level (which is a turn-off level), and the collision output signal CRS_OUT is at a low level (which is a turn-off level).

[0127] When the collision input signal CRS_IN reaches the reference voltage at 11 ms after decreasing from 5 ms, the collision output signal CRS_OUT becomes a high level (which is a turn-on level). Figure 7 In the experimental example, the reference voltage is 4.5V.

[0128] When the collision output signal CRS_OUT changes from a low level to a high level, the collision switching signal CRS_SHFT changes to a low level (which is a turn-on level).

[0129] In addition, when the collision input signal CRS_IN reaches the off operation voltage at 26.5 ms after increasing from 22.5 ms, the collision output signal CRS_OUT changes to a low level (which is a off level). Figure 7 In the experimental example, the shutdown operation voltage is 5V.

[0130] When the collision output signal CRS_OUT changes from a high level to a low level, the collision switching signal CRS_SHFT changes to a high level (which is an off level).

[0131] exist Figure 8 In the experimental example of FIG. 1 , the reference voltage can be derived when the resistance value of the two resistors R1 and R2 is 43 kΩ.

[0132] Reference Figure 8 , when the time is 0 ms, the collision input signal CRS_IN is at a high level (which is a turn-off level), and the collision output signal CRS_OUT is at a low level (which is a turn-off level).

[0133] When the collision input signal CRS_IN reaches the reference voltage at 12ms after decreasing from 5ms, the collision output signal CRS_OUT becomes a high level (which is a turn-on level). Figure 8 In the experimental example, the reference voltage is 3.9V.

[0134] When the collision output signal CRS_OUT changes from a low level to a high level, the collision switching signal CRS_SHFT changes to a low level (which is a turn-on level).

[0135] In addition, when the collision input signal CRS_IN reaches the off operation voltage at 26.8 ms after increasing from 22.5 ms, the collision output signal CRS_OUT changes to a low level (which is a off level). Figure 8 In the experimental example, the shutdown operation voltage is 5.28V.

[0136] When the collision output signal CRS_OUT changes from a high level to a low level, the collision switching signal CRS_SHFT changes to a high level (which is an off level).

[0137] exist Fig. 9 In the experimental example of FIG. 1 , the reference voltage can be derived when the resistance value of the two resistors R1 and R2 is 100 kΩ.

[0138] Reference Fig. 9 , when the time is 0 ms, the collision input signal CRS_IN is at a high level (which is a turn-off level), and the collision output signal CRS_OUT is at a low level (which is a turn-off level).

[0139] When the collision input signal CRS_IN reaches the reference voltage at 12.5 ms after decreasing from 5 ms, the collision output signal CRS_OUT becomes a high level (which is a turn-on level). Fig. 9 In the experimental example, the reference voltage is 3V.

[0140] When the collision output signal CRS_OUT changes from a low level to a high level, the collision switching signal CRS_SHFT changes to a low level (which is a turn-on level).

[0141] In addition, when the collision input signal CRS_IN reaches the off operation voltage at 27 ms after increasing from 22.5 ms, the collision output signal CRS_OUT changes to a low level (which is a off level). Fig. 9 In the experimental example, the shutdown operation voltage is 5.4V.

[0142] When the collision output signal CRS_OUT changes from a high level to a low level, the collision switching signal CRS_SHFT changes to a high level (which is an off level).

[0143] exist Fig.10 In the experimental example of , the reference voltage can be derived when the resistance value of the two resistors R1 and R2 is 200 kΩ.

[0144] Reference Fig.10 , when the time is 0 ms, the collision input signal CRS_IN is at a high level (which is a turn-off level), and the collision output signal CRS_OUT is at a low level (which is a turn-off level).

[0145] When the collision input signal CRS_IN reaches the reference voltage at 13.5 ms after decreasing from 5 ms, the collision output signal CRS_OUT becomes a high level (which is a turn-on level). Fig.10 In the experimental example, the reference voltage is 2.2V.

[0146] When the collision output signal CRS_OUT changes from a low level to a high level, the collision switching signal CRS_SHFT changes to a low level (which is a turn-on level).

[0147] In addition, when the collision input signal CRS_IN reaches the off operation voltage at 27 ms after increasing from 22.5 ms, the collision output signal CRS_OUT changes to a low level (which is a off level). Fig.10 In the experimental example, the shutdown operation voltage is 5.6V.

[0148] When the collision output signal CRS_OUT changes from a high level to a low level, the collision switching signal CRS_SHFT changes to a high level (which is an off level).

[0149] Reference Figures 6 to 10 In the experimental example, as the resistance value of each of the two resistors R1 and R2 increases, the reference voltage when the switch Q1 is turned on decreases.

[0150] The foregoing is an explanation of some embodiments of the present disclosure and should not be interpreted as limiting it. Although some embodiments have been described, it will be readily understood by those skilled in the art that it is feasible to make various modifications in the embodiments without departing from the spirit and scope of the present disclosure. It should be understood that, unless otherwise specified, the description of the features or aspects in each embodiment should generally be considered to be applicable to other similar features or aspects in other embodiments. Therefore, it is obvious to those of ordinary skill in the art that, unless otherwise specifically specified, the features, characteristics and / or elements described in conjunction with a specific embodiment can be used alone or in combination with the features, characteristics and / or elements described in conjunction with other embodiments. Therefore, it should be understood that the foregoing is an explanation of various example embodiments and should not be interpreted as being limited to the specific embodiments disclosed herein, and various modifications to the disclosed embodiments and other example embodiments are intended to be included in the spirit and scope of the present disclosure as defined in the attached claims and their equivalents.

[0151] Symbol Description

[0152] 1.1_1: Collision detection system

[0153] 10.10_1: Collision switch circuit

[0154] 110: Main switch

[0155] 120: Level converter

[0156] 20: Safety related circuits

[0157] 30: Collision sensor

[0158] 40: Main Control Unit (MCU)

Claims

1. A collision switch circuit, comprising: The first switch comprises: an emitter configured to be supplied with a positive terminal voltage of the battery pack; a collector configured to output a collision output signal; and a base connected to the first node; a first resistor and a capacitor connected in parallel with each other between the emitter and the first node; and The diode includes an anode and a cathode, wherein the anode is configured to be supplied with a collision input signal from the collision sensor, and the cathode is connected to the first node.

2. The collision switch circuit according to claim 1, wherein: The first switch is configured to be turned on when the collision input signal reaches a reference voltage level from a voltage level indicating a normal state for more than a reference time.

3. The collision switch circuit according to claim 2, wherein: The reference time is determined by a resistance value of the first resistor and a capacitance value of the capacitor.

4. The collision switch circuit according to claim 2, wherein: The diode is a Zener diode having a breakdown voltage value; and The collision switch circuit further includes a second resistor connected between the cathode of the diode and the first node, and the reference voltage level is determined by a resistance value of the first resistor, a resistance value of the second resistor, and the breakdown voltage value.

5. The collision switch circuit according to claim 1, further comprising: The second switch comprises: a collector configured to output a collision conversion signal; The emitter, connected to ground; and a base connected to the second node; a third resistor connected between the collector of the first switch and the second node; a fourth resistor connected between the second node and ground; and A fifth resistor is connected between the driving voltage and the collector of the second switch.

6. A collision detection system comprising: a collision switch circuit configured to output a collision output signal when a collision input signal indicating a collision detected by the collision sensor reaches a reference voltage level from a voltage level indicating a normal state for more than a reference time; as well as The safety-related circuit is configured to be turned on or off based on the collision output signal, and to perform a protection operation corresponding to the collision based on the collision output signal.

7. The collision detection system according to claim 6, wherein: The collision switch circuit comprises: The first switch comprises: an emitter configured to be supplied with a positive terminal voltage of the battery pack; a collector configured to output a collision output signal; and a base connected to the first node; a first resistor and a capacitor connected in parallel with each other between the emitter and the first node; and The diode includes an anode and a cathode, the anode being configured to be supplied with a collision input signal from the collision sensor, and the cathode being connected to the first node.

8. The collision detection system according to claim 7, wherein: The reference time is determined by a resistance value of the first resistor and a capacitance value of the capacitor.

9. The collision detection system according to claim 7, wherein: The diode is a Zener diode having a breakdown voltage; and The collision switch circuit further includes a second resistor connected between the cathode of the diode and the first node, and the reference voltage level is determined by a resistance value of the first resistor, a resistance value of the second resistor, and a value of the breakdown voltage.

10. The collision detection system according to claim 7, further comprising: a main control unit configured to control the safety-related circuit; as well as A level converter is configured to output a collision conversion signal to the main control unit, wherein the collision conversion signal is generated by changing a level of the collision output signal according to a driving voltage.

11. The collision detection system according to claim 10, wherein: The level converter comprises: The second switch comprises: a collector configured to output a collision conversion signal; The emitter, connected to ground; and a base connected to the second node; a third resistor connected between the collector of the first switch and the second node; a fourth resistor connected between the second node and ground; and A fifth resistor is connected between the driving voltage and the collector of the second switch.

Images