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WO2019035523A1 - Circuit de protection de batterie et bloc-batterie le comprenant - Google Patents

Circuit de protection de batterie et bloc-batterie le comprenant Download PDF

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Publication number
WO2019035523A1
WO2019035523A1 PCT/KR2018/002841 KR2018002841W WO2019035523A1 WO 2019035523 A1 WO2019035523 A1 WO 2019035523A1 KR 2018002841 W KR2018002841 W KR 2018002841W WO 2019035523 A1 WO2019035523 A1 WO 2019035523A1
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WO
WIPO (PCT)
Prior art keywords
cell
cells
terminal
battery
controller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2018/002841
Other languages
English (en)
Korean (ko)
Inventor
한종찬
이우진
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung SDI Co Ltd
Original Assignee
Samsung SDI Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020170157636A external-priority patent/KR102519119B1/ko
Application filed by Samsung SDI Co Ltd filed Critical Samsung SDI Co Ltd
Priority to US16/637,347 priority Critical patent/US11799303B2/en
Priority to CN201880052904.5A priority patent/CN110999024B/zh
Priority to EP18845978.8A priority patent/EP3644473B1/fr
Priority to PL18845978.8T priority patent/PL3644473T3/pl
Publication of WO2019035523A1 publication Critical patent/WO2019035523A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • An embodiment relates to a battery protection circuit and a battery pack including the same.
  • a secondary cell is a cell that can alternately repeat charging and discharging.
  • the secondary battery can be discharged by converting chemical energy into electrical energy, and if the electrical energy is charged in the discharged state, it can be stored again in the form of chemical energy.
  • the secondary battery is applied to various portable electronic devices.
  • a notebook computer is equipped with a battery pack of a multi-serial structure in which a plurality of secondary batteries (hereinafter referred to as "cells") connected in series with each other are combined with a charge / discharge circuit.
  • cells secondary batteries
  • a thermal cut-off may be mounted on a battery pack of a multi-series structure in which square cells or polymer cells are connected in series.
  • the TCO is a device for securing the safety of each cell from the risk of overcharging or short-circuiting by cutting off the current according to the ambient temperature.
  • the TCO Since the TCO is a temperature-driven device, it must be in close contact with the cell to facilitate temperature transfer from the cell. Because of this feature, additional materials such as tape and Ni-plate are used to mount the TCO on the battery pack, and additional processes such as welding, cell adhesion, and tape processing are required. In addition, if the cell temperature is not properly transmitted due to the TCO mounting defect, there may arise a problem that the protection operation due to TCO is not performed properly.
  • the present invention provides a battery protection circuit and a battery pack including the battery protection circuit, which can support a protection operation for each cell in a multi-serial type battery pack.
  • a battery protection circuit includes a battery module composed of a plurality of cells connected in series and a charge control switch connected in series to a large current path between a plurality of pack terminals, And a current controller connected to each of the plurality of cells on the large current path for interrupting a current flowing in the corresponding cell based on a cell voltage of a corresponding one of the plurality of cells, Wherein the plurality of first protection circuits are connected in series between adjacent ones of the cells or between any one of the plurality of cells and the first pack terminal of the plurality of pack terminals, And at least one switch connected to said at least one switch in accordance with a cell voltage of said corresponding cell, Controller.
  • the battery protection circuit may further include a fuse element connected in series to the large current path and a second protection circuit for controlling the fuse element based on the cell voltage of each of the plurality of cells.
  • the fuse element includes a control terminal, at least one heating resistor connected to the control terminal and generating heat in accordance with a voltage applied to the control terminal, and at least one heating resistor connected in series to the high current path, Lt; / RTI >
  • the first and second protection circuits may be independently driven.
  • the at least one switch may be a field effect transistor.
  • the at least one switch includes a drain terminal, a source terminal coupled to a first electrode of the corresponding cell, and a gate terminal to which a control signal is applied from the cell controller, wherein a current flowing in the first direction Channel field effect transistor that controls the first N-channel field effect transistor.
  • the at least one switch comprises a drain terminal connected to a drain terminal of the first channel field effect transistor, a source terminal connected to the cell adjacent to the corresponding cell or the first pack terminal, Channel field effect transistor including an applied gate terminal and controlling a current flowing in the corresponding cell in a second direction.
  • Each of the plurality of first protection circuits includes a first resistor coupled to a second electrode of the corresponding cell and delivering a voltage of a second electrode of the corresponding cell to the cell controller, And a second resistor connected to a source terminal of the second N-channel field-effect transistor and operating as the first resistor and the current-limiting resistor.
  • the first electrode of the corresponding cell may be the cathode of the corresponding cell.
  • the battery pack includes a battery module including a plurality of cells connected in series, a plurality of pack terminals, a charge control switch serially connected to the large current path between the battery module and the plurality of pack terminals, A battery controller for controlling the charge control switch based on a cell voltage of each cell of the plurality of cells, and a battery controller connected to each of the plurality of cells on the large current path, And a plurality of first protection circuits for blocking or allowing current to flow in the cells, wherein each of the plurality of first protection circuits includes one of a plurality of cells, one of the plurality of cells, At least one switch connected in series between the first pack terminals and at least one switch according to the cell voltage of the corresponding cell That control may include a cell controller.
  • the battery pack may further include a fuse element connected in series to the large current path and a second protection circuit for controlling the fuse element based on the cell voltage of each of the plurality of cells.
  • the at least one switch of the battery pack includes a drain terminal, a source terminal coupled to a first electrode of the corresponding cell, and a gate terminal to which a control signal is applied from the cell controller, Channel field effect transistor and a drain terminal connected to a drain terminal of the first channel field effect transistor, a source connected to the corresponding cell or the first pack terminal, Channel field effect transistor having a terminal and a gate terminal to which a control signal is applied from the cell controller and controlling a current flowing in the corresponding cell in a second direction.
  • each of the plurality of first protection circuits of the battery pack includes a first resistor connected to a second electrode of the corresponding cell and delivering a voltage of a second electrode of the corresponding cell to the cell controller, A capacitor connected between the resistor and the first electrode of the corresponding cell and a second resistor coupled to the source terminal of the second N-channel field effect transistor, the second resistor operating as the first resistor and the current limiting resistor .
  • the battery controller can activate the protection operation earlier than the cell controller.
  • the battery protection circuit according to the embodiment can secure the safety of each cell from the risk of overcharge or short circuit.
  • the battery protection circuit according to the embodiment is easy to mount and does not require any additional material in comparison with the case where the TCO is mounted, so that the unit cost of the battery pack can be reduced.
  • FIG. 1 schematically shows a battery pack according to an embodiment.
  • FIG. 2 shows a cell protection circuit of the battery pack shown in FIG. 1 in detail.
  • FIG. 3 illustrates an example of a protection circuit module PCB on which the cell protection circuit according to the embodiment is mounted.
  • Electrical connection of two components includes not only direct connection of two components but also connection between two components via different components.
  • Other components may include switches, resistors, capacitors, and the like.
  • the expression " connection " means that the connection is electrically connected when there is no expression of direct connection.
  • FIG. 1 schematically shows a battery pack according to an embodiment
  • FIG. 2 shows a cell protection circuit of the battery pack shown in FIG. 1 in detail
  • 3 shows an example of a printed circuit board on which a cell protection circuit according to the embodiment is mounted.
  • a battery pack 100 may include a battery module 10, an interface 30, and a battery protection circuit.
  • the components shown in Figs. 1 and 2 are not essential, so that the battery pack according to the embodiment can be implemented to include more or fewer components.
  • the battery module 10 may include a plurality of cells Cell1 and Cell2 connected in series with each other. 1 and 2, the battery module 10 includes two cells. However, the present invention is not limited thereto. According to another embodiment, the battery module may include three or more cells connected in series with each other.
  • the interface 30 may include a plurality of terminals for performing an interface with an external device.
  • the interface 30 includes pack terminals P + and P- for supplying electric energy to an external load or receiving electric energy from an external charging device and communication terminals T1 and T2 for communicating with an external device ).
  • the battery protection circuit includes a charge control switch C-SW, a discharge control switch D-SW, a fuse element F, a temperature sensor TS, a shunt resistor SR, a battery controller 110, 120 and cell protection circuits 131, 132, respectively.
  • the charge control switch C-SW is connected in series to the charge path of the battery module 10 and can cut off or supply the charge current of the battery module 10.
  • the charging path is a current flow path between the battery module 10 and a charging device (not shown) connected through the pack terminals P + and P- of the battery pack 100, To the battery module (10).
  • the discharge control switch D-SW is connected in series to the discharge path of the battery module 10 and can cut off or supply the discharge current of the battery module 10.
  • the discharge path is a current flow path between the battery module 10 and the load (not shown) connected through the pack terminals P + and P- of the battery pack 100, It is a path for transferring current to the load.
  • the charging path and the discharging path are relatively large in the magnitude of the current flowing through the path in comparison with other current flow paths in the battery pack 100. [ In this document, discharge path and charge path are also called 'high current path'.
  • the charge control switch C-SW and the discharge control switch D-SW may each include a field effect transistor (FET) (C-FET, D-FET) and diodes D11 and D12 .
  • FET field effect transistor
  • Each of the FETs (C-FET and D-FET) is connected in series to a large current path, and a current (discharge current or charge current) supplied through a large current path is supplied to the control terminal from the battery controller 110 according to a control signal You can block or allow it.
  • the charge control FET (C-FET) can block or allow the flow of the charge current supplied from the external charging device to the battery module 10 through the large current path.
  • the charge control FET (C-FET) When the charge control FET (C-FET) is turned on, the first and second terminals of the charge control FET (C-FET) are conducted, and the charge current can flow from the charge device to the battery module 10 through the large current path .
  • the charge control FET (C-FET) is turned off, the flow of the charge current flowing through the large current path between the charging device and the battery module 10 can be cut off.
  • the discharge control FET can block or allow the flow of the discharge current supplied from the battery module 10 to the external load through the large current path.
  • the discharge control FET D-FET
  • the discharge control FET D-FET
  • the discharge control FET D-FET
  • the discharge control FET D-FET
  • the discharge current flowing through the large current path between the battery module 10 and the load can be shut off.
  • each of the FETs is composed of an N-channel FET.
  • the first terminal, the second terminal, and the control terminal of each FET (C-FET, D-FET) become a source terminal, a drain terminal, and a gate terminal, respectively.
  • the drain terminals of the charge control FET (C-FET) and the discharge control FET (D-FET) are connected to each other, and the source terminals of the charge control FET (C- Module 10 and the pack terminal P +, respectively.
  • the charging control switch C-SW and the discharging control switch D-SW are connected between the positive electrode of the battery module 10 and the positive electrode pack terminal P + of the battery pack 100
  • the present invention is not limited thereto.
  • the charge control switch C-SW or the discharge control switch D-SW may be connected between the cathode of the battery module 10 and the cathode pack terminal P- of the battery pack 100 .
  • Each of the diodes D11 and D12 is a parasitic diode of each FET (C-FET, D-FET), and is configured so that current flows in a direction opposite to the direction in which the current is limited by the corresponding FET.
  • the diode D11 causes a current to flow to the discharge path
  • the diode D12 causes the current to flow to the charge path.
  • the fuse element F is connected in series to the large current path and can cut off the large current path of the battery module 10.
  • the fuse element F is a self control protection (SCP) element.
  • the fuse element F includes a pair of fuses F1 and F2 connected in series to the large current path of the battery module 10, And heating resistors RF1 and RF2 connected in parallel with the first and second switching elements F1 and F2.
  • the pair of fuses F1 and F2 constituting the fuse element F are connected in series between the anode of the battery module 10 and the anode pack terminal P +.
  • the heating resistors RF1 and RF2 are connected in parallel between a contact point between the first fuse F1 and the second fuse F2 and a control terminal of the fuse element F.
  • the heating resistors RF1 and RF2 generate heat in accordance with the voltage applied to the control terminal of the fuse element F and the fuses F1 and F2 are fused due to the heat generation of the heating resistors RF1 and RF2
  • the large current path of the battery module 10 can be cut off.
  • the temperature sensor TS detects the temperature around the battery module 10 and transmits the detected temperature to the battery controller 110.
  • the shunt resistor SR is a current sensing resistor and can be used to measure the current (charge current or discharge current) flowing in a large current path in series with the large current path.
  • the shunt resistor SR may be connected between the negative electrode of the battery module 10 and the negative electrode pack terminal P-.
  • the present invention is not limited thereto, and according to another embodiment, the shunt resistor SR may be connected to the large current path between the anode of the battery module 10 and the anode pack terminal (Pack +).
  • the battery controller 110 may control the overall operation of the battery protection circuit.
  • the battery controller 110 may include a voltage detection circuit (not shown) connected to each cell (Cell1, Cell2) of the battery module 10 through voltage measurement terminals.
  • the voltage detection circuit may detect the cell voltage of each cell (Cell1, Cell2) constituting the battery module 10 and the voltage across the battery module 10.
  • the battery controller 110 may include a current detection circuit (not shown) electrically connected to both ends of the shunt resistor SR through current measurement terminals.
  • the current detection circuit can measure the current flowing through the shunt resistor SR. Since the shunt resistor SR is located on the large current path between the battery module 10 and one of the pack terminals Pack-, the current detecting circuit measures the current flowing through the shunt resistor SR, The current (charge current or discharge current) can be measured.
  • the battery controller 110 can detect the ambient temperature of the battery module 10 through the temperature sensor TS.
  • the battery controller 110 controls the battery module 10 or the battery module 10 based on the cell voltages of the cells Cell1 and Cell2, the module voltage of the battery module 10, the current size flowing through the large current path, The state of charge (SOC) of each cell (Cell1, Cell2) constituting the battery module 10 can be obtained.
  • the charge control switch C-SW or the discharge control switch D-C is controlled based on the state of charge (SOC) of each cell Cell1, Cell2 constituting the battery module 10 or the battery module 10. [ SW to control ON / OFF of the charge control switch C-SW or the discharge control switch D-SW.
  • the battery controller 110 controls the charge control switch C-SW, the discharge control switch D-SW or the fuse element F to perform a protection operation for protecting the battery module 10 from overvoltage, overcurrent, Can be performed.
  • the battery controller 110 compares the cell voltages detected through the voltage detection circuit with a first reference voltage for determining an overvoltage due to overcharge and a second reference voltage for determining a lower voltage due to overdischarge. If the current battery module 10 is determined to be in an over-voltage state, the battery controller 110 turns on the charge control switch C-SW or the charge control switch C-SW and the discharge control switch D- Off. Also, when the battery module 10 is determined to be in an overvoltage state, the battery controller 110 may control the fuse element F to shut off the high current path. If the current battery module 10 is determined to be in a low voltage state, the battery controller 110 controls the discharge control switch D-SW or the charge control switch C-SW and the discharge control switch D- Can be turned off.
  • the battery controller 110 detects the overcurrent (overcharge current, overdischarge current) state of the battery module 10 based on the current flowing in the large current path, and when the battery module 10 is in the overcurrent state, The switch C-SW can be turned off or the charge control switch C-SW and the discharge control switch D-SW can be turned off. Also, when the battery module 10 is determined to be in an overcurrent state, the battery controller 110 may control the fuse element F to shut off the large current path.
  • the battery controller 110 detects a short failure in the battery pack 100 based on the current flowing in the large current path or the ambient temperature of the battery module 10, and when a short- It is possible to shut off the high current path by controlling the voltage (F).
  • the battery controller 110 may control operation of a cell balancing circuit (not shown) that performs cell balancing of the battery module 10 based on the cell voltages of the cells Cell1 and Cell2.
  • the battery controller 110 may be connected to an external device through the communication terminals T1 and T2 of the battery pack 100 to perform communication with the external device.
  • Each function of the battery controller 110 may be performed by a processor implemented in one or more central processing units (CPUs) or other chipsets, microcontroller units (MCUs), microprocessors, .
  • CPUs central processing units
  • MCUs microcontroller units
  • the protection circuit 120 includes a voltage detection circuit (not shown) connected to each of the cells Cell1 and Cell2 constituting the battery module 10, Voltage can be detected.
  • the protection circuit 120 detects an overvoltage state of each cell Cell1 and Cell2 based on the cell voltage of each cell Cell1 and Cell2 and controls the fuse element F when a certain cell becomes an overvoltage state, .
  • the cell protection circuits 131 and 132 detect the overvoltage, the short circuit, the overcurrent (overcharge current or overcurrent) state of each cell Cell1 and Cell2 based on the cell voltage of each cell Cell1 and Cell2, A protection operation can be performed. That is, when the corresponding cell is in the overvoltage, overcurrent or short-circuit state, each cell protection circuit 131, 132 opens the large current path through which the current flows between the cells 131, 132, Lt; / RTI >
  • Each of the cell protection circuits 131 and 132 may be connected in series between the cell and the cell or between the cell and the pack terminal on the large current path. 2, the cell protection circuits 131 and 132 are connected in series between the cell Cell1 and the cell Cell2, and between the cell Cell2 and the pack terminal P-.
  • the cell protection circuits 131 and 132 are connected to the corresponding cathodes of the corresponding cells.
  • the present invention is not limited thereto, Lt; / RTI >
  • the cell protection circuit 131 is connected between the anode of the corresponding cell Cell1 and the anode cell terminal P +
  • the cell protection circuit 132 is connected between the anode of the corresponding cell Cell2, Can be connected between the cathodes of the first cell (Cell 1).
  • the battery protection circuit further includes a voltage amplification circuit for controlling the switching elements (FET21 and FET22) in the cell protection circuits 131 and 132. In the case where the cell protection circuits 131 and 132 are connected to the corresponding cells, can do.
  • Each of the cell protection circuits 131 and 132 may include a plurality of FETs FET21 and FET22 having a common drain structure, a cell controller 210, a plurality of resistors R21 and R22, and a capacitor C21.
  • Each of the FETs (FET21 and FET22) is connected in series with a corresponding cell on a large current path, and can allow or block the flow of a current (charge current or discharge current) flowing in a large current path.
  • the first FET (FET21) is a discharge control switch of a corresponding cell, and can block or allow the flow of a discharge current supplied to an external load through a large current path.
  • the first FET (FET21) is turned on, the first and second terminals of the first FET (FET21) are conducted and the discharge current can flow through the high current path to the load.
  • the first FET (FET21) is turned off, the discharge current flowing through the large current path can be shut off.
  • the second FET (FET22) can block or allow the flow of the charging current supplied from the external charging device through the high current path to the charge control switch of the corresponding cell.
  • the second FET (FET22) is turned on, the first and second terminals of the second FET (FET22) are conducted and the charging current supplied from the charging device through the large current path can flow.
  • the second FET (FET 22) is turned off, the charge current flowing in the large current path can be shut off.
  • each of the FETs is composed of an N-channel FET.
  • the first terminal, the second terminal and the control terminal of each FET become the source terminal, the drain terminal and the gate terminal, respectively.
  • the drain terminals of the first and second FETs FET21 and FET22 are connected to each other and the source terminals of the first and second FETs FET21 and FET22 are connected to the cathode of the corresponding cell and the anode of the neighboring cell Or the negative electrode pack terminal P-).
  • the cell controller 210 is connected to both ends of the corresponding cell to detect the cell voltage of the corresponding cell. Further, on / off of the first and second FETs (FET21 and FET22) is detected based on the overvoltage, short circuit, overcurrent (overcharging current or overcurrent) state of the corresponding cell based on the cell voltage of the corresponding cell .
  • the cell controller 210 can turn off the second FET (FET 22), which is the charge controlling FET, to interrupt the flow of the charging current.
  • the second FET (FET22) can be turned on to allow charging current flow of the corresponding cell if the voltage of the corresponding cell is again lower than the overvoltage.
  • the reference voltage (overvoltage) for determining the overvoltage state of the corresponding cell in the cell controller 210 is set to a value higher than the first reference voltage for determining the overvoltage for the plurality of cells in the battery controller 110 . Then, the battery controller 110 can start the protection operation against the overvoltage first than the cell controller 210.
  • the cell controller 210 can turn off the first FET (FET21), which is the discharge control FET, to interrupt the flow of the discharge current.
  • the first FET (FET21) can be turned on to allow discharge current flow of the corresponding cell if the voltage of the corresponding cell is again higher than the low voltage.
  • the reference voltage (low voltage) for determining the low voltage state of the corresponding cell in the cell controller 210 is set to a value lower than the second reference voltage for determining the low voltage for the plurality of cells in the battery controller 110 . Then, the battery controller 110 can start the protection operation for the low voltage first than the cell controller 210.
  • the first and second FETs FET21 and FET22 and the cell controller 210 may be implemented as an integrated circuit (IC)
  • IC integrated circuit
  • an IC constituted by the first and second FETs (FET21 and FET22) and the cell controller 210 is referred to as a 'protection IC'.
  • Each protec- tion line IC 200 has a VDD terminal connected to the anode of the corresponding cell, a V- terminal for sensing the charging / discharging state of the corresponding cell, a cathode of the corresponding cell and a source terminal of the first FET And an S2 terminal for connecting the positive terminal of the neighboring cell and the source terminal of the second FET (FET22).
  • the first resistor R21 includes a first terminal connected to the anode of the corresponding cell and a second terminal connected to the VDD terminal of the corresponding protection IC 200, To the cell controller (210) in the protection IC (200).
  • the capacitor C21 is connected between the VDD terminal of the protection IC 200 (or the second terminal of the first resistor R21) and the S1 terminal of the protection IC 200, It is possible to stabilize the voltage input to the IC 200 (the voltage across the corresponding cell).
  • the second resistor R22 is connected between the S2 terminal (source terminal of the second FET (FET22) of the protection IC 200) and the V- terminal of the protection IC 200 and is connected together with the first resistor R21,
  • the high voltage charging device exceeding the absolute maximum rating of IC 200 may operate as a current limiting resistor for the case of inverted connection.
  • the cell protection circuits 131 and 132 may be mounted on a printed circuit board (PCB) 300 on which a battery protection circuit is mounted, as shown in FIG.
  • PCB printed circuit board
  • the battery protection circuit 120 may include a battery protection circuit 120, for example, It is.
  • the PCB 300 includes a plurality of conductive taps NT1 to NT4, and each of the conductive taps NT1 to NT4 is coupled to an anode or a cathode of a corresponding cell.
  • the PCB 300 is mounted with the cell protection circuits 131 and 132 including the protection IC 200, the first and second resistors R21 and R22, and the capacitor C21.
  • the cell protection circuits 131 and 132 can be mounted on the printed circuit board 300 unlike the TCO, and need not be disposed in contact with the respective cells. Therefore, the assembling complexity and the unit cost of the battery pack 100 can be reduced as compared with the conventional battery pack using the TCO for performing the protection operation for each cell.
  • the battery controller 110, the protection circuit 120, and the cell controller 210 of the protection IC 200 can assist each other in protecting functions. That is, even if one of the battery controller 110, the protection circuit 120, and the cell controller 210 of the protection IC 200 malfunctions to perform the battery protection function properly, the remainder performs the battery protection function, And operates to secure the safety of the pack 100. To this end, the battery controller 110, the protection circuit 120, and the cell controller 210 of the protection IC 200 are independently driven.
  • FET 21 first FET
  • FET 22 second FET

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un circuit de protection de batterie qui comprend : un commutateur de commande de charge connecté en série à un trajet de courant élevé entre un module de batterie composé d'une pluralité de cellules connectées en série et une pluralité de bornes de bloc ; un dispositif de commande de batterie permettant de commander le commutateur de commande de charge sur la base d'une tension de cellule de chaque cellule de la pluralité de cellules ; et une pluralité de premiers circuits de protection, chacun étant connecté à chaque cellule de la pluralité de cellules sur le trajet de courant élevé, pour couper ou connecter un courant électrique circulant à travers une cellule correspondante sur la base de la tension de cellule de la cellule correspondante de la pluralité de cellules, la pluralité de premiers circuits de protection pouvant comprendre : au moins un commutateur connecté en série entre des cellules voisines ou entre n'importe quelle cellule de la pluralité de cellules et une première borne de bloc de la pluralité de bornes de bloc ; et un dispositif de commande de cellule permettant de commander ledit commutateur en fonction de la tension de cellule de la cellule correspondante.
PCT/KR2018/002841 2017-08-14 2018-03-09 Circuit de protection de batterie et bloc-batterie le comprenant Ceased WO2019035523A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US16/637,347 US11799303B2 (en) 2017-08-14 2018-03-09 Battery protection circuit and battery pack comprising same
CN201880052904.5A CN110999024B (zh) 2017-08-14 2018-03-09 电池保护电路和包括该电路的电池组
EP18845978.8A EP3644473B1 (fr) 2017-08-14 2018-03-09 Circuit de protection de batterie et bloc-batterie le comprenant
PL18845978.8T PL3644473T3 (pl) 2017-08-14 2018-03-09 Obwód zabezpieczający akumulatora i zawierający go pakiet akumulatorowy

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20170103136 2017-08-14
KR10-2017-0103136 2017-08-14
KR10-2017-0157636 2017-11-23
KR1020170157636A KR102519119B1 (ko) 2017-08-14 2017-11-23 배터리 보호 회로 및 이를 포함하는 배터리 팩

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WO2019035523A1 true WO2019035523A1 (fr) 2019-02-21

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PCT/KR2018/002841 Ceased WO2019035523A1 (fr) 2017-08-14 2018-03-09 Circuit de protection de batterie et bloc-batterie le comprenant

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HU (1) HUE067355T2 (fr)
PL (1) PL3644473T3 (fr)
WO (1) WO2019035523A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080116851A1 (en) * 2005-04-20 2008-05-22 Iichiro Mori Secondary Battery Protection Circuit, Battery Pack and Thermosensitive Protection Switch Device
KR20080082869A (ko) * 2007-03-09 2008-09-12 주식회사 엘지화학 2차전지 보호회로 및 그의 제어방법
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KR20080082869A (ko) * 2007-03-09 2008-09-12 주식회사 엘지화학 2차전지 보호회로 및 그의 제어방법
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