KR20100005496U - Terminal assembly for a large capacitance battery - Google Patents

Abstract

Disclosed is a terminal assembly for a large capacity rechargeable battery for reducing power consumption of a large capacity rechargeable battery. The terminal assembly for a large capacity rechargeable battery includes a first terminal portion, a second terminal portion, and a switching pin. The first terminal portion defines a predetermined space so that the terminal of the first polarity is inserted. The second terminal portion defines a predetermined space so that the terminal of the second polarity is inserted. The switching pin is configured to charge the battery with power provided through the first and second terminal parts during the charging operation, and to control the battery pack circuit so that the power supplied with the rechargeable battery is supplied to the load through the first and second terminal parts during the discharging operation. It is electrically connected, is disposed in a space defined by the first terminal portion, and controls the startup of the battery pack circuit as the first terminal is inserted into the first terminal portion. Accordingly, by controlling the operation of the battery pack circuit provided in the large-capacity rechargeable battery using a switching pin provided separately, the operation of the battery pack circuit can be started only during the charging operation or the discharging operation, thereby reducing the power consumption of the large-capacity rechargeable battery. Can be reduced.

Description

TERMINAL ASSEMBLY FOR A LARGE CAPACITANCE BATTERY}

The present invention relates to a terminal assembly for a large-capacity rechargeable battery, and more particularly, to a terminal assembly for a large-capacity rechargeable battery to reduce the power consumption of the large-capacity rechargeable battery is adopted.

Recently, compact and lightweight electric / electronic devices such as portable computers have been actively developed and produced. These portable electric / electronic devices have battery packs built in so that they can be operated in a place without a separate power source. The built-in battery pack has a form in which at least one bare battery cells are connected to each other and packaged so as to output a predetermined level of voltage to drive the portable electric / electronic device for a predetermined period of time.

The battery pack has recently adopted a secondary battery capable of charging and discharging in consideration of economic aspects. Secondary batteries include, for example, nickel-cadmium batteries, lead-acid batteries, nickel metal hydride batteries, lithium ion batteries, and the like. Among these, the lithium ion battery has recently been commercialized and mainly employed because of its excellent energy density per weight.

The lithium ion battery may carry various products by miniaturization of electronic products, and portable electronic products are used as power sources. The lithium ion battery is charged using a charger after use.

The advantage of lithium ion batteries is that they have a large capacity and can be used for a long time after being charged. It is also lighter than other batteries. However, it is pointed out as a problem that it is more dangerous than other batteries, and it is difficult to make a high power battery capable of flowing high discharge current due to safety problems.

Therefore, in order to maintain battery performance and to maintain safety, a protection circuit that is not used in other batteries is used. The lithium ion rechargeable battery pack has a structure in which a plurality of series connected bare battery cells (unit cells) and pack electrodes are connected by a protection circuit.

Therefore, the technical problem of the present invention has been made in view of this point, an object of the present invention is to provide a terminal assembly for a large capacity rechargeable battery for reducing the power consumption of a large capacity rechargeable battery.

In order to realize the above object of the present invention, a terminal assembly for a high-capacity rechargeable battery according to an embodiment includes a first terminal portion, a second terminal portion, and a switching pin. The first terminal portion defines a predetermined space so that the terminal of the first polarity is inserted. The second terminal portion defines a predetermined space so that the terminal of the second polarity is inserted. The switching pin charges the rechargeable battery with power provided through the first and second terminal portions during the charging operation, and controls the power supplied with the rechargeable battery to be supplied to the load through the first and second terminal portions during the discharge operation. It is electrically connected to a battery pack circuit, is disposed in a space defined by the first terminal portion, and controls the start-up of the battery pack circuit as the first terminal is inserted into the first terminal portion.

According to the terminal assembly for a large-capacity rechargeable battery, the operation of the battery pack circuit provided in the large-capacity rechargeable battery is controlled using a switching pin provided separately, so that the operation of the battery pack circuit can be started only during a charging operation or a discharge operation. In addition, the power consumption of a large capacity rechargeable battery can be reduced.

Hereinafter, a terminal assembly for a large capacity rechargeable battery according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As the inventive concept allows for various changes and numerous modifications, the embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals are used for like elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the terms--including--or--consist--are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described on the specification, one or It should be understood that no other features or numbers, steps, actions, components, parts, or combinations thereof are excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In addition, in order to distinguish that --- first--, --2-2-, --third --- and --fourth --- described in the detailed description and the claims of the present invention are different components, It will be referred to, regardless of the order of manufacture, the name may not coincide in the description and claims.

1 is an exploded perspective view illustrating a large capacity rechargeable battery 500 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating the terminal assembly 110 for the large capacity rechargeable battery illustrated in FIG. 1.

1 and 2, a large-capacity rechargeable battery 500 according to an embodiment of the present invention includes a rechargeable battery body 510 and a terminal assembly 110 disposed in a -z direction on a portion of the rechargeable battery body 510. Include.

The rechargeable battery main body 510 includes a plurality of batteries disposed in the main body. In this embodiment, the cells may comprise four cylindrical cells. The cylindrical cells may be connected in series with each other.

The terminal assembly 110 includes a cover member 210, a support member 220, a substrate member 230, a first terminal portion 112, a second terminal portion 114, and a switching pin 116.

The cover member 210 may include the support member 220, the substrate member 230, the first terminal portion 112, the second terminal portion 114, and the switching pin 116. The rechargeable battery body 510 is disposed.

The support member 220 has a plate shape, the nut leg portion 212 disposed in the −Z direction protrudes, and the first and second holes 222a and 222b for hook coupling with the cover member 210. ) Are formed at both edge portions, and third and fourth holes 224a and 224b for inserting the first and second terminal portions 112 and 114 are formed in the inner region.

The substrate member 230 has a plate shape, and four holes 232a, 232b, 232c, and 232d are formed at the edge of the substrate member 230 so that four bolts 240a, 240b, 240c, and 240d may pass through the substrate member 230. And metal piece holes 234a, 234b, 234c, 234d, 234e, 234f, for insertion of the metal pieces 112a, 112b, 112c, 114a, 114b, and 114c of the first and second terminal portions 112 and 114, respectively. 236a, 236b, 236c, 236d, 236e, and 236f are formed, and switching pin holes 238a and 238b for insertion and sliding movement of the switching pin 116 are formed.

The first terminal portion 112 defines a predetermined space so that the terminal of the first polarity is inserted. Specifically, the first terminal portion 112 includes three metal pieces 112a to 112c, and the three metal pieces 112a to 112c are arranged in a triangular shape surrounding the terminal of the first polarity, and thus the first metal part 112a to 112c. 1 Define the space where the terminal with polarity is inserted. The three metal pieces 112a to 112c fold one end of the long metal piece about one third and form a U-shaped groove at the other end so that the other end is divided into two branches.

The second terminal portion 114 defines a predetermined space so that the terminal of the second polarity is inserted. Specifically, the second terminal portion 114 includes three metal pieces 114a to 114c, and the three metal pieces 114a to 114c are arranged in a triangular shape surrounding the terminal of the second polarity to be formed of the first terminal. 2 Define the space where the polarity terminal is inserted. The three metal pieces 114a to 114c fold one end of the long metal piece about one third, and form a U-shaped groove at the other end so that the other end is divided into two branches.

The switching pin 116 charges the rechargeable battery with the power provided through the first and second terminal portions 112 and 114 during the charging operation, and supplies the power charged with the rechargeable battery with the first and second terminals during the discharge operation. It is electrically connected to the battery pack circuit for controlling the supply to the load through the terminal portion, is disposed in the space defined by the first terminal portion, the start of the battery pack circuit as the first terminal is inserted into the first terminal portion To control.

The terminal assembly 110 includes a battery recognition pin 118, a switching pin 116, six metal pieces 112a to 112c, 114a to 114c, four bolts 240a to 240d, and a support member 220. And a substrate member 230.

The battery recognition pin 118 has a circular hole at one end, and is generally in the shape of number 7. The battery recognition pin 118 is used to recognize a battery, and as a potential of a predetermined level is supplied to the battery recognition pins 116 and 118, a charging operation is started.

The switching pin 116 is a V-shaped pin, and one side of the pin has elasticity, so that one side of the pin can slide to the other side when the terminal is inserted, and when the terminal is removed, Is restored. The switching pin 116 is used to turn on / off the microcomputer 170.

The four bolts 240a to 240d and the leg portion 212 protruding from the support member 220 are screwed together with the substrate member 230 interposed therebetween.

In addition, the support member 220 may further include two battery recognition pin holes 226a and 226b, and the substrate member 230 may further include one battery recognition pin hole 239. have.

In addition, the support member 220 includes holes for inserting the metal pieces 112a to 112c and 114a to 114c at positions corresponding to the metal piece holes 234a to 234f and 236a to 236f formed in the substrate member 230. 228a, 228b, 228c, 229a, 229b, 229c may be formed.

According to the terminal assembly for a large-capacity rechargeable battery, the operation of the battery pack circuit provided in the large-capacity rechargeable battery is controlled using a switching pin provided separately, so that the operation of the battery pack circuit can be started only during a charging operation or a discharge operation. In addition, the power consumption of a large capacity rechargeable battery can be reduced.

3 is a block diagram illustrating a battery pack circuit in which a terminal assembly for a large capacity rechargeable battery according to the present invention is employed.

Referring to FIG. 3, the battery pack circuit 100 includes a terminal unit 110, a protection circuit module (PCM) control unit 120, a main charge / discharge switching unit 130, and a first charge / discharge switching unit. 140, a second charge / discharge switching unit 150, a boosting unit 160, a main control unit 170, a discharge current detecting unit 180, and a remaining amount display unit 190.

The terminal unit 110 may have a structure and a shape as described with reference to FIGS. 1 and 2. The terminal unit 110 includes a first terminal 112 of a kind of positive polarity and a second terminal 114 of a kind of negative polarity. In the charging operation, the terminal unit 110 receives power supplied from the outside and supplies the battery string 50 to the battery string 50 via the first charge / discharge switching unit 140 and the main charge / discharge switching unit 130. In the discharging operation, charging power is supplied to a load (not shown) via the battery voltage of the battery string 50 via the main charge / discharge switching unit 130 and the first charge / discharge switching unit 140.

In addition, when the terminal 110 checks that the battery voltage of the battery string 50 falls below a predetermined level, the terminal voltage 110 sets the battery voltage of the battery string 50 to the main charge / discharge switching unit 130 and the first battery. The boosted battery voltage passing through the charge / discharge switching unit 150 and the boosting unit 160 is supplied to the rod.

4A to 4F are images illustrating the terminal unit illustrated in FIG. 3. In particular, FIG. 4A is an image for explaining the front side of the terminal portion shown in FIG. 3, FIG. 4B is an image for explaining the back side of the terminal portion shown in FIG. 1, and FIG. 4C is a first side view of the terminal portion shown in FIG. 3. FIG. 4D is an image for explaining the second side of the terminal unit illustrated in FIG. 3. 4E is an image illustrating a first side of the case of the battery pack with the terminal portion shown in FIG. 3, and FIG. 4F is an image illustrating the second side of the case of the battery pack with the terminal portion shown in FIG. 3. to be.

4A to 4F, the terminal unit includes a first terminal corresponding to the positive voltage and a second terminal corresponding to the negative voltage. Each of the first and second terminals is composed of three metal pieces. Three metal pieces are arranged in a triangular shape. In the charging operation, a space defined by three metal pieces arranged in a triangular shape is connected to a terminal of a charger (not shown) to provide a charging voltage to the battery string 50. In addition, during the discharge operation, the node is connected to a node in a space defined by three metal pieces arranged in a triangular shape to provide the node with a charging voltage charged in the battery string 50.

3, the PCM controller 120 supplies a switching signal to the main charge / discharge switching unit 130 to control an operation of the main charge / discharge switching unit 130, and the battery string 50. ) Detects the battery voltage detected in each of the series-connected batteries provided to the battery and supplies the detected battery voltage to the discharge current detecting unit 180.

Specifically, the PCM control unit 120 blocks the operation of the main charge / discharge switching unit 130 when the battery voltage level of the battery cell is lower or higher than the threshold. In addition, the PCM controller 120 blocks the operation of the main charge / discharge switching unit 130 when the threshold current is higher than the threshold current. Substantially, the PCM controller 120 may perform an auxiliary function when the main controller 170 fails to block the operation of the battery pack circuit due to overcharge or overdischarge.

The main charge / discharge switching unit 130 is turned on / off based on a switch signal supplied from the PCM controller 120. That is, a voltage supplied through the terminal unit 110 and the first charge and discharge switching unit 140 during a charging operation is supplied to the battery string 50, and a battery voltage of the battery string 50 is discharged during a discharge operation. The first charge / discharge switching unit 140 or the second charge / discharge switching unit 150 is supplied.

The first charge / discharge switching unit 140 is connected to an output terminal of the main charge / discharge switching unit 130 and the terminal unit 110 and turned on / off according to a switching signal supplied from the main controller 170.

The second charge / discharge switching unit 150 is connected to an output terminal of the main charge / discharge switching unit 130 and the boosting unit 160 and is turned on or off according to a switching signal supplied from the main control unit 170.

The booster 160 is turned on by the second charge / discharge switching unit 150 according to a switching signal supplied from the main control unit 170 so that the battery voltage is passed through the main charge / discharge switching unit 130. When supplied, the battery voltage is boosted and supplied to the terminal unit 110.

The main controller 170 turns on the first charge / discharge switching unit 140 to control the battery voltage output through the main charge / discharge switching unit 130 to be supplied to the terminal unit 110.

In addition, when the initial high current discharge in the cryogenic state, the main control unit 170, when the battery voltage detected by the battery is reduced to a predetermined level or less, that is, when the instantaneous voltage drop, the first charge-discharge switching unit 140 Turn off and turn on the second charge / discharge switching unit 150 to boost the battery voltage output through the main charge / discharge switching unit 130 to be controlled to be supplied to the terminal unit 110.

The discharge current detection unit 180 detects the discharge current supplied from the PCM control unit 120 and supplies the discharge current to the main control unit 170.

The remaining amount display unit 190 displays the remaining voltage of the battery string provided from the main controller 170 as the remaining amount display switch (not shown) provided separately. For example, as the signal is supplied to the microcomputer 170 corresponding to the remaining level of the high level by checking at 70% or more of the battery capacity, the remaining amount display unit 190 performs the high level display operation, and the 40 of the battery capacity is maintained. As the signal is supplied to the microcomputer 170 in correspondence with the remaining level of the low level, the remaining amount display unit 190 performs a low level display operation.

5A to 5C are circuit diagrams illustrating a battery pack circuit having a normal discharge function in a cryogenic state shown in FIG. 3.

3 to 5C, the battery pack circuit 100 having a normal discharge function in a cryogenic state may include a terminal unit 110, a protection circuit module (PCM) controller 120, and main charge / discharge switching. The unit 130, the first charge / discharge switching unit 140, the second charge / discharge switching unit 150, the boosting unit 160, the microcomputer 170, the discharge current detecting unit 180, and the remaining amount display unit 190 Include.

The terminal unit 110 includes a first terminal 112 that is a positive terminal (+) and a second terminal 114 that is a negative terminal (-), and is connected to an external battery terminal during a charging operation or a discharge operation. Perform the action. That is, during the charging operation, the first and second terminals 112 and 114 receive power supplied from the outside, for example, power supplied from a charger, and provide the battery pack to the battery pack. In addition, during the discharge operation, the first and second terminals 112 and 114 are connected to a load, for example, a radio, to provide a battery voltage charged in the battery pack to the radio. In FIG. 3B, a temperature fuse TF is further provided between the first terminal 112 and the first charge / discharge switching unit 140.

The terminal unit 110 further includes third terminals 116 and 118 and fourth terminals 118 and 116. The third terminals 116 and 118 are used for battery recognition, and as the electric potential of a predetermined level is supplied to the third terminals 116 and 118, a charging operation is started.

The fourth terminals 118 and 116 are used for turning on and off the microcomputer 170. That is, for example, a ground voltage applied to the second terminal 114 as the fourth terminals 118 and 116 are electrically contacted with the second terminal 114 may cause the ground voltage of the eighth transistor Q8 to be reduced. The eighth transistor Q8 and the ninth transistor Q9 are turned on by being applied to a gate and a gate of the ninth transistor Q9. As the voltage applied to the first terminal 112 is applied to the LDILDO IC of FIG. 3A5A according to the turn-on of the eighth transistor Q8, the VCC power supplied to the micom 170 is applied to the micom 170. The microcomputer 170 is activated. On the contrary, when the external terminal is removed, the eighth and ninth transistors Q8 and Q9 are turned off so that the VCC power is not output, and thus the microcomputer 170 is not operated. Becomes small, and long time storage is possible.

The first power sensing terminal VC1, the second power sensing terminal VC2, the third power sensing terminal VC3, and the fourth power sensing terminal VC4 of the PCM control unit 120 are connected from four batteries connected in series. Detect battery voltage. The charge control terminal COP and the discharge control terminal DOP of the PCM controller 120 are connected to the main charge / discharge switching unit 130 to control charging and discharging operations of the battery string 50.

The main charge / discharge switching unit 130 includes a first main discharge switch and a first main charge switch connected in series. The first main discharge switch includes a first diode D1 connected between a first transistor Q1 and a source-drain of the first transistor Q1. The first main charge switch includes a second diode D2 connected between a second transistor Q2 and a source-drain of the second transistor Q2. The first and second transistors Q1 and Q2 include a p-channel MOSFET. In this embodiment, one main discharge switch is implemented through one transistor and a diode connected in parallel thereto. However, the diode may be implemented through a body-diode which is an electronic component integrally formed in a transistor. The body-diode is a p-channel enhancement mode field effect transistor (FET).

In the charging / discharging operation, when the low signal is applied to the first and second transistors Q1 and Q2 from the PCM controller 120, the first and second transistors Q1 and Q2 are turned on. Accordingly, in the charging operation, the externally supplied power is charged in the battery pack 50 via the second transistor Q2 and the first transistor Q1. In the charging operation, the second diode D2 connected in parallel to the second transistor Q2 blocks the charging operation when the voltage of the first to fourth power detection terminals VC1, VC2, VC3, and VC4 is higher than the threshold range. do. In the discharging operation, the power charged in the battery pack 50 is supplied to the load via the first and second transistors Q1 and Q2. The first diode D1 connected in parallel to the first transistor Q1 has a reverse current when the voltage of the first to fourth power source sensing terminals VC1, VC2, VC3, and VC4 is lower than the threshold range in the discharge operation. Block the flow.

The first charge / discharge switching unit 140 includes a first charge switch and a first discharge switch connected in series. The first charging switch includes a third diode D3 connected between a third transistor Q3 and a source-drain of the third transistor Q3. The first discharge switch includes a fourth diode D4 connected between the fourth transistor Q4 and the source-drain of the fourth transistor Q4. The third and fourth transistors Q3 and Q4 include a p-channel MOSFET.

In the charging / discharging operation, when the low signals are applied from the microcomputer 170 to the third and fourth transistors Q3 and Q4, the third and fourth transistors Q3 and Q4 are turned on. Accordingly, in the charging operation, the externally supplied power is charged in the battery pack 50 via the fourth transistor Q4 and the third transistor Q3. The fourth diode D4 connected in parallel to the fourth transistor Q4 blocks the charging operation when the battery voltage is higher than the threshold range in the charging operation. In the discharging operation, the power charged in the battery pack 50 is supplied to the load via the third transistor Q3 and the fourth transistor Q4. The third diode D3 connected in parallel to the third transistor Q3 blocks the reverse current from flowing when the battery voltage is lower than the threshold range in the discharge operation.

Meanwhile, when the initial high current is discharged in the cryogenic state, when a high signal is applied from the microcomputer 170 to the third and fourth transistors Q3 and Q4, the third and fourth transistors Q3 and Q4 are turned on. -Off. Accordingly, in the discharging operation, the power charged in the battery pack 50 is blocked from being supplied to the load via the third and fourth transistors Q3 and Q4.

The second charge / discharge switching unit 150 includes a second discharge switch connected between the main charge / discharge switching unit 130 and the boosting unit 160 and a second charging switch connected between the boosting unit 160 and the terminal unit. The second discharge switch includes a fifth diode D5 connected between the fifth transistor Q5 and the source-drain of the fifth transistor Q5. The second charging switch includes a sixth diode D6 connected between the sixth transistor Q6 and the source-drain of the sixth transistor Q6. The fifth and sixth transistors Q5 and Q6 include a p-channel MOSFET.

When the high signal from the microcomputer 170 is applied to the fifth and sixth transistors Q5 and Q6, the fifth and sixth transistors Q5 and Q6 are turned off. Accordingly, the power supplied from the outside is not charged in the battery pack 50 via the sixth transistor Q6 and the fifth transistor Q5. The sixth diode D6 connected in parallel with the sixth transistor Q6 blocks current flowing through the booster 160 during the charging operation.

When a high current is discharged through the battery pack in a cryogenic state, the microcomputer 170 supplies a low signal to the fifth and sixth transistors Q5 and Q6. Accordingly, it is possible to prevent the discharging operation due to the instantaneous voltage drop being forcibly cut off. However, when the battery voltage output from the battery string 50 is higher than or equal to a threshold voltage, the microcomputer 170 supplies a high signal to the fifth and sixth transistors Q5 and Q6 to provide fifth and sixth voltages. The sixth transistors Q5 and Q6 are turned off.

When the low signal from the microcomputer 170 is applied to the fifth and sixth transistors Q5 and Q6, the fifth and sixth transistors Q5 and Q6 are turned on. Accordingly, the battery voltage charged in the battery pack 50 is supplied to the boosting unit 160 via the fifth transistor Q5, and the battery voltage boosted by the boosting unit 160 is the third voltage. 6 is supplied to the load via transistor Q6. The fifth diode D5 connected in parallel to the fifth transistor Q5 blocks a current flowing through the fifth transistor when the booster 160 is not operated during the discharge operation. Accordingly, it is possible to prevent the current from being consumed through the booster during the discharge operation.

The booster 160 includes an inductor L5, a DC-DC converter 162, a seventh transistor Q7, a seventh diode D7, a capacitor C6, a first resistor R61, and a second resistor ( The voltage including the R62 and the third resistor R63 is boosted and provided to the terminal unit 110 via the sixth diode D6.

The microcomputer 170 performs an overcharge test and a temperature test of the battery pack, and blocks the charging operation when the battery pack is overcharged. Block it. The temperature test may be performed through a negative temperature coefficient type resistor (NTC) connected to a path through which the power of the microcomputer is supplied. By connecting the negative temperature coefficient type resistor to the microcomputer 170, the operating temperature of the battery pack circuit can be measured.

When the microcomputer 170 checks the discharge current and checks that the discharge current is less than or equal to 0 mA, the microcomputer 170 performs the overcharge test and the temperature test again.

In addition, when the microcomputer 170 checks that the discharge current is greater than 0 mA, the microcomputer 170 re-performs the temperature test and performs a series of discharge operations according to the tested temperature. For example, if the temperature is checked to 70 degrees Celsius or more, the microcomputer 170 determines that the temperature is higher than the charge and discharge operation. When the temperature is checked to be less than -25 degrees Celsius, when supplying the battery voltage of the battery pack to the load, the microcomputer 170 adjusts the discharge path so that the discharge operation is performed through the boost path rather than the normal path.

The microcomputer 170 turns on the first charge / discharge switching unit 140 during a charging operation to control power supplied from the outside to the battery string 50.

In addition, the microcomputer 170 cuts off the first charge / discharge switching unit 140 when an instantaneous voltage drop occurs when the battery voltage detected by the battery string 50 falls below a threshold value during the initial discharge operation. The first charge / discharge switching unit 140 blocks the battery voltage from being applied to the load and at the same time, the second charge / discharge switching unit 150 is turned on to boost the voltage to increase the dropped voltage to the load. The supplied battery voltage is controlled to be supplied to the load. The instantaneous voltage drop when the battery voltage falls below a threshold may occur even if the battery pack is fully charged if the battery pack is used in a cryogenic state.

On the other hand, when a predetermined time has elapsed after the step-up operation is performed according to the cryogenic temperature or the battery pack is not used in the cryogenic state, the microcomputer 170 is the first charge-discharge switching unit 150 during the discharge operation Turn on to control so that the power charged in the battery string 50 is supplied to the load.

Specifically, the microcomputer 170 is connected to the first control terminal CONT1 when the voltage detected by the battery string 50 in the cryogenic state is reduced to less than a predetermined level when an instantaneous voltage drop occurs due to a high current discharge. A high signal is output to the gate terminal of the third transistor Q3, and a high signal is output to the gate terminal of the fourth transistor Q4 connected to the second control terminal CONT2. The third and fourth transistors Q3 and Q4 are turned off to block the battery voltage from being output to the terminal through the first charge / discharge switching unit 140.

At the same time, the microcomputer 170 outputs a low signal to the gate terminal of the fifth transistor Q5 connected to the third control terminal CONT3 and the sixth transistor Q6 connected to the fourth control terminal CONT4. A low signal is output to the gate terminal to turn on the fifth and sixth transistors Q5 and Q6 of the second charge / discharge switching unit 150. Accordingly, the battery voltage output through the main charge / discharge switching unit 130 is controlled to be supplied to the terminal unit 110 via the boosting unit 160.

On the other hand, when a predetermined time has elapsed after the step-up operation is performed according to the cryogenic temperature or more than a predetermined voltage level, or when the battery pack is not used in the cryogenic state, the microcomputer 170 has a first control terminal CONT1. A low signal is output to the gate terminal of the third transistor Q3 connected to the gate signal, and a low signal is output to the gate terminal of the fourth transistor Q4 connected to the second control terminal CONT2. The third and fourth transistors Q3 and Q4 of the 140 are turned on. Accordingly, the battery voltage output through the main charge / discharge switching unit 130 is controlled to be supplied to the terminal unit 110.

The discharge current detector 180 includes a fourth resistor R81, a fifth resistor R82, a sixth resistor R83, a seventh resistor R84, and an operational amplifier OP, and the PCM controller ( The discharge current supplied from the 120 is sensed and supplied to the main controller 170. In operation, the voltage of the discharge current value provided through the resistor R82 is amplified and provided to the main controller 170 at the first terminal 112 of the terminal unit 110 via the resistor R83.

The remaining amount display unit 190 includes a first LED 192 connected to the first display terminal LD1 of the microcomputer 170, and a second LED 194 connected to the second display terminal LD2 of the microcomputer 170. And a third LED 196 connected to the third display terminal LD3 of the microcomputer 170. The first to third LEDs LD1, LD2, and LD3 emit light in response to a signal provided from the microcomputer 170.

Next, the operation of the battery pack circuit having the normal discharge function in the cryogenic state shown in the embodiment of the present invention, in particular, the operation during discharge will be described.

At the beginning of discharge, the first and second transistors Q1 and Q2 are turned on by the PCM controller 120, and the third and fourth transistors Q3 and Q4 are turned on by the microcomputer 170. Is turned on. Accordingly, the battery voltage of the battery pack 50 is supplied to the load via the first and second transistors Q1 and Q2 and the third and fourth transistors Q3 and Q4. At this time, the fifth transistor Q5 and the sixth transistor Q6 are kept turned off by the microcomputer 170.

The initial recognition of the discharge may be recognized as a terminal (not shown) connected to the gate terminal of each of the eighth and ninth transistors Q8 and Q9 is pressed. That is, as the terminal is pressed, when the low signal is applied, the eighth and ninth transistors Q8 and Q9 are turned on so that the voltage-divided battery voltage is applied to the microcomputer 170.

That is, as the eighth transistor Q8 is turned on, the output voltage of the main charge / discharge switching unit 130 is divided in voltage and applied to the microcomputer 170, and as the ninth transistor Q9 is turned on, the eighth transistor Q8 is turned on. The output voltage of the charge / discharge switching unit is divided by voltage and applied to the microcomputer 170.

When a high voltage discharge occurs in the cryogenic state, when the instantaneous voltage drop occurs, the fifth and sixth transistors Q5 and Q6 are turned on by the microcomputer 170 and at the same time, the third and fourth transistors Q3, Q4 is turned off by the microcomputer 170 to cut off the battery voltage output through the third and fourth transistors Q3 and Q4. As the fifth transistor Q5 is turned on, the battery voltage via the main charge / discharge switching unit 130 is applied to the booster 160 to be boosted to a predetermined level, and the boosted voltage is increased to the sixth transistor ( It is supplied to the rod via Q6).

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the subject innovation described in the utility model registration claims below. I can understand that.

1 is an exploded perspective view illustrating a large capacity rechargeable battery according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view illustrating the terminal assembly for the large capacity rechargeable battery illustrated in FIG. 1.

3 is a block diagram illustrating a battery pack circuit in which a terminal assembly for a large capacity rechargeable battery according to the present invention is employed.

4A to 4F are images illustrating the terminal unit illustrated in FIG. 3.

5A to 5C are circuit diagrams illustrating the battery pack circuit shown in FIG. 3.

<Description of the symbols for the main parts of the drawings>

110: terminal assembly 112: first terminal portion

112a-112c, 114a-114c: Metal pieces 114: Second terminal portion

116: switching pin 118: battery recognition pin

210: cover member 220: support member

230: substrate member 500: large capacity rechargeable battery

510: rechargeable battery body

Claims (3)

A first terminal portion defining a predetermined space such that a terminal of a first polarity is inserted; A second terminal portion defining a predetermined space such that a terminal of a second polarity is inserted; And In the battery pack circuit for controlling the power supplied to the battery through the first and second terminal portion in the charging operation, and to supply the power charged in the rechargeable battery to the load through the first and second terminal portion in the discharge operation And a switching pin electrically connected to each other, the switching pin being disposed in a space defined by the first terminal part and controlling the activation of the battery pack circuit as the twelfth terminal is inserted into the twelfth terminal part. The terminal assembly as claimed in claim 1, further comprising a battery recognition pin for checking the battery recognition as a potential of a predetermined level is supplied to perform the charging operation. The method of claim 1, wherein the first terminal portion comprises three metal pieces, the three metal pieces are arranged in a triangular shape surrounding the first terminal to define a space in which the terminal of the first polarity is inserted, The second terminal portion includes three metal pieces, and the three metal pieces are arranged in a triangular shape surrounding the second terminal to define a space in which the terminal of the second polarity is inserted. .

Images