WO2022136082A1 - Wechselakkupack mit zumindest einem schaltelement zur unterbrechung bzw. ermöglichung eines lade- oder entladestroms - Google Patents
Wechselakkupack mit zumindest einem schaltelement zur unterbrechung bzw. ermöglichung eines lade- oder entladestroms Download PDFInfo
- Publication number
- WO2022136082A1 WO2022136082A1 PCT/EP2021/086067 EP2021086067W WO2022136082A1 WO 2022136082 A1 WO2022136082 A1 WO 2022136082A1 EP 2021086067 W EP2021086067 W EP 2021086067W WO 2022136082 A1 WO2022136082 A1 WO 2022136082A1
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- WO
- WIPO (PCT)
- Prior art keywords
- battery pack
- switching
- potential
- switching element
- resistor
- 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
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Classifications
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- H02J7/80—
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- H02J7/60—
-
- H02J7/751—
-
- H02J7/855—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the invention relates to an exchangeable battery pack with a monitoring unit and with at least one first switching element for interrupting or enabling a charging or discharging current according to the preamble of claim 1.
- exchangeable battery packs A large number of electrical consumers are operated with battery packs that can be exchanged without tools by the operator—hereinafter referred to as exchangeable battery packs—which are correspondingly discharged by the electrical consumers and can be recharged using a charger.
- exchangeable battery packs consist of a plurality of energy storage cells connected in series and/or in parallel in order to achieve a required exchangeable battery pack voltage or capacity. If the energy storage cells are in the form of lithium-ion cells (Li-ion), for example, a very high power and energy density can be achieved with particular advantage.
- Li-ion lithium-ion
- a first of the electrical contacts of the interfaces is designed as a power supply contact that can be acted upon with a first reference potential, preferably a supply potential, and a second of the electrical contacts of the Interfaces designed as a power supply contact that can be acted upon by a second reference potential, preferably a ground potential.
- the monitoring unit controls the at least one first switching element by means of a switching potential which is derived directly from the first reference potential, in particular from the supply potential, and is decoupled from voltage fluctuations and dips in the first reference potential, in particular the supply potential .
- a switching potential which is derived directly from the first reference potential, in particular from the supply potential, and is decoupled from voltage fluctuations and dips in the first reference potential, in particular the supply potential .
- Electrical consumers in the context of the invention should be understood to mean, for example, power tools operated with a replaceable battery pack for processing workpieces using an electrically driven application tool.
- the power tool can be designed both as a hand-held power tool and as a stationary power tool.
- Typical power tools in this context are handheld or stationary drills, screwdrivers, percussion drills, hammer drills, planes, angle grinders, orbital sanders, polishing machines, circular saws, table saws, chop saws and jigsaws or the like.
- the voltage of an exchangeable battery pack is usually a multiple of the voltage of an individual energy storage cell and results from the interconnection (in parallel or in series) of the individual energy storage cells.
- An energy storage cell is typically configured as a galvanic cell having a configuration in which one cell pole is at one end and another cell pole is at an opposite end. In particular, the energy storage cell has a positive cell pole at one end and a negative cell pole at an opposite end.
- the energy storage cells are preferably in the form of lithium-based energy storage cells, for example Li-Ion, Li-Po, Li-Metal or the like.
- the invention can also be used for exchangeable battery packs with Ni-Cd, Ni-MH cells or other suitable cell types.
- One is preferred Energy storage cell as at least essentially cylinder shaped round cell formed, wherein the cell poles are arranged at ends of the cylindrical shape.
- the invention is not dependent on the type and design of the energy storage cells used, but can be applied to any exchangeable battery packs and energy storage cells, for example pouch cells or the like in addition to round cells.
- the decoupled switching potential is formed by an RC element consisting of at least one resistor and at least one capacitor, the RC element between the first and the second reference potential, in particular between the supply potential and the Ground potential is connected and the switching potential between the at least one resistor and the at least one capacitor is present.
- a protective diode in particular a Schottky diode.
- a Schottky diode also offers the advantage of a lower voltage drop, so that a higher voltage is available for switching the at least one first switching element.
- the at least one resistor of the RC element is dimensioned in such a way that, due to its resistance value, in the event of a short circuit within the exchangeable battery pack electronics, there is no dangerous heat development for the exchangeable battery pack.
- a short circuit can occur, for example, as a result of a faulty capacitor in the RC element, as a result of a fault in the monitoring unit or in a driver circuit controlled by it.
- a rather small resistance value of well below 1 k ⁇ is selected in order not to limit the switching current for the at least one first switching element too much in the interest of faster switching times.
- this has the disadvantage that such a resistor would be overloaded in the event of a short circuit, which makes an additional fuse element necessary.
- the resistance value of the at least one resistor is set at at least 1 k ⁇ and the disadvantage of it being too low Switching current additionally compensated by a sufficiently high capacitance of the capacitor of the RC element.
- the at least one capacitor of the RC element is dimensioned in such a way that its capacity is greater than the sum of all capacities of the replaceable battery pack that are charged when the at least one first switching element is switched on.
- the capacitance of the at least one capacitor should be at least so large that the switching potential decreases sufficiently slowly in the event of a drop in the exchangeable battery pack voltage in order to be able to switch the at least one first switching element for a certain period of time.
- the high-impedance design of the RC element results in an advantage in that the switching potential for the at least one switching element is largely decoupled from short circuits on or in the replaceable battery pack.
- the RC element is dimensioned in such a way that the time constant resulting from the product of the resistance value of the at least one resistor and the capacitance of the at least one capacitor does not cause long charging times of the at least one capacitor of the RC element that are disadvantageous for the operation of the replaceable battery pack switching on the at least one first switching element could have a negative effect.
- the resulting avoidance of switching times that are too long or switching potentials that build up too slowly before the at least one first switching element is switched on can effectively reduce the risk of functional impairments or loss of performance of the replaceable battery pack.
- the switching potential can be applied to the at least one first switching element by means of a half-bridge consisting of two further switching elements.
- the half-bridge consists of a second and a third switching element, the second switching element serving as a high-side switch preferably being a P-channel MOSFET or a PNP bipolar transistor and the third serving as a low-side switch Switching element is preferably designed as an N-channel MOSFET or as an NPN bipolar transistor.
- the at least one second and/or third resistor are dimensioned in such a way that, due to their resulting resistance value, the switching current required for rapid switching of the at least one first switching element is not too low and, on the other hand, in the event of a short circuit or if the second and third are accidentally switched on at the same time Switching element does not generate heat that is dangerous for the exchangeable battery pack.
- the resulting resistance value of the at least one second and/or third resistor should be significantly less than 1 k ⁇ .
- an optimized dimensioning of the at least one second resistor has the effect that the currents that can occur as a result of the switching of the second switching element designed as a high-side switch do not entail excessive component stress, which leads to premature aging of the second switching element in particular and of the at least one second resistor and could thus damage the removable battery pack.
- FIG. 1 a system comprising at least one replaceable battery pack and at least one charger that can be connected to the replaceable battery pack for charging or an electrical consumer that can be connected to the replaceable battery pack for discharging the replaceable battery pack in a schematic representation
- FIG. 2 a block diagram of the system of Figure 1 for loading the
- FIG. 1 shows an exchangeable battery pack 10 with an electromechanical interface 14 having a plurality of electrical contacts 12.
- the exchangeable battery pack 10 can be charged by means of a charger 16 and discharged by various electrical consumers 18.
- the charging device 16 and the electrical consumers 18 each have a further electromechanical interface 20 having a plurality of electrical contacts 12 .
- FIG. 1 is intended to illustrate that the invention is suitable for various electrical consumers 18.
- a battery-powered vacuum cleaner 22, a battery-powered impact wrench 24 and a battery-powered lawn trimmer 26 are shown as examples. In the context of the invention, however, a wide variety of power tools, gardening tools and household appliances can be used as electrical loads 18 .
- the exchangeable battery pack 10 comprises a housing 28 which has the electromechanical interface 14 on a side wall or on its upper side 30 for the detachable connection to the further electromechanical interface 20 of the charger 16 or the electrical consumers 18 .
- the electromechanical interfaces 14, 20 are primarily used to discharge the removable battery pack 10, while they are used in conjunction with the charger 16 to charge the removable battery pack 10.
- the exact design of the electromechanical interfaces 14, 20 depends on various factors, such as the voltage class of the replaceable battery pack 10 or the electrical consumer 18 and various manufacturer specifications. For example, three or more electrical contacts 12 can be provided for energy and/or data transmission between the exchangeable battery pack 10 and the charger 16 or the electrical consumer 18 .
- a mechanical coding is also conceivable, so that the replaceable battery pack 10 can only be operated on specific electrical loads 18 . Since the mechanical design of the electromechanical interface 14 of the replaceable battery pack 10 and the further electromechanical interface 20 of the charger 16 or the electrical consumer 18 is irrelevant for the invention, will not be discussed in detail. Both a person skilled in the art and an operator of the replaceable battery pack 10 and the charging device 16 or the electrical consumer 18 will make the appropriate selection in this regard.
- the exchangeable battery pack 10 has a mechanical locking device 32 for locking the positively and/or non-positively releasable connection of the electromechanical interface 14 of the exchangeable battery pack 10 to the corresponding mating interface 20 (not shown in detail) of the electrical load 18.
- the locking device 32 is a spring-loaded pusher 34 is formed, which is operatively connected to a locking member 36 of the exchangeable battery pack 10 . Due to the springiness of the pusher 34 and/or the locking member 36, the locking device 32 automatically snaps into place when the replaceable battery pack 10 is pushed into the mating interface 20 of the electrical load 18. If an operator presses the push button 34 in the direction of insertion, the lock is released and the operator can remove or push out the replaceable battery pack 10 from the electrical consumer 18 in the opposite direction to the direction of insertion.
- the rechargeable battery voltage of the exchangeable rechargeable battery pack 10 generally results from a multiple of the individual voltages of the energy storage cells (not shown), depending on their wiring (in parallel or in series).
- the energy storage cells are preferably in the form of lithium-based energy storage cells, e.g. Li-Ion, Li-Po, Li-Metal or the like.
- the invention can also be used for exchangeable battery packs with Ni-Cd, Ni-MH cells or other suitable cell types.
- FIG. 2 shows a block diagram consisting of the exchangeable battery pack 10 on the left-hand side and a charger 16 or electrical consumer 18 on the right-hand side.
- the replaceable battery pack 10 and the charger 16 or the electrical consumer 18 have the mutually corresponding electromechanical interfaces 14 and 20 with a plurality of electrical contacts 12, with a first of the electrical contacts 12 of the interfaces 14, 20 being connected to a first reference potential Vi , preferably a supply potential V+, power supply contact 38 that can be acted upon and in each case a second of the electrical contacts 12 of the interfaces 14, 20 serves as an energy supply contact 40 that can be subjected to a second reference potential V2, preferably a ground potential GND.
- a second reference potential V2 preferably a ground potential GND.
- the removable battery pack 10 can be charged on the one hand by the charger 16 with a charging current and on the other hand discharged by the electrical consumer 18 with a discharge current.
- the current strengths of charging and discharging current can differ significantly from each other.
- the discharge current can be up to 10 times higher than the charging current of the charging device 16 in the case of appropriately designed electrical consumers 18.
- the common symbol I is to be used despite these differences between the charging and discharging currents.
- the term "can be acted upon” is intended to make it clear that the potentials V+ and GND are not permanently present at the power supply contacts 38, 40, particularly in the case of an electrical load 18, but only after the electrical interfaces 14, 20 have been connected. The same applies to a discharged replaceable battery pack 10 after connecting to the charger 16.
- the replaceable battery pack 10 has a plurality of energy storage cells 42, which are shown in Figure 2 as a series connection, but can alternatively or additionally also be operated in a parallel connection, with the series connection using the energy supply contacts 38, 40 dropping the voltage Ußatt of the replaceable battery pack 10 defined, while a parallel connection of individual energy storage cells 42 primarily increases the capacity of the removable battery pack 10.
- individual cell clusters consisting of energy storage cells 42 connected in parallel can also be connected in series in order to achieve a specific voltage U.sub.Batt of the exchangeable battery pack with a simultaneously increased capacity.
- the capacity of common exchangeable battery packs can be 10 up to 12 Ah or more.
- the invention is not of the type, design, voltage, power supply capability, etc. depends on the energy storage cells 42 used, but can be applied to any removable battery pack 10 and energy storage cells 42.
- An SCM preliminary stage 44 (single cell monitoring) is provided for monitoring the individual energy storage cells 42 or cell cluster of the exchangeable battery pack 10 connected in series.
- the SCM preliminary stage 44 has a multiplexer measuring device 46 which can be connected to corresponding taps 50 of the poles of the energy storage cells 42 or cell cluster via filter resistors 48 with high resistance.
- the term energy storage cell is also intended to include the cell cluster, since these only have an effect on the capacity of the replaceable battery pack 10, but have the same meaning for detecting the cell voltages Uceii.
- the filter resistors 50 which are designed in particular to have a high resistance, can prevent dangerous heating of the measuring inputs of the multiplexer measuring device 46, particularly in the event of a fault.
- the multiplexer measuring device 46 can be switched over via a monitoring unit 52 integrated in the exchangeable battery pack 10 or also directly within the SCM preliminary stage 44 .
- switching elements 54 of the SCM preliminary stage 44 connected in parallel with the energy storage cells 42 can be closed or opened in this way in order in this way to bring about a so-called balancing of the energy storage cells 42 in order to achieve uniform charging or discharging states of the individual energy storage cells 42.
- the SCM preliminary stage 44 forwards the measured cell voltages Uceii to the monitoring unit 52, so that the actual measurement of the cell voltages Uceii is carried out directly by the monitoring unit 52, for example via a corresponding analog-to-digital converter (ADC).
- ADC analog-to-digital converter
- the monitoring unit 52 can be designed as an integrated circuit in the form of a microprocessor, ASICs, DSPs or the like. However, it is also conceivable for the monitoring unit 52 to consist of a plurality of microprocessors or at least in part of discrete components with appropriate transistor logic.
- the first monitoring unit 52 can have a memory for storing operating parameters of the replaceable battery pack 10, such as the voltage Ußatt, the cell voltages Uceii, a temperature T, the charging or discharging current I or the like.
- the charging device 16 or the electrical load 18 can also have a monitoring unit 56 which can be designed in accordance with the monitoring unit 52 of the exchangeable battery pack 10 .
- the two monitoring units 52, 56 can communicate with one another via a third contact 12, designed as a signal or data contact 58, of the electromechanical interfaces 14, 20.
- the two monitoring units 52, 56 can exchange essential operating parameters required for the charging process via the signal or data contact 58. It is also conceivable that the monitoring units 52, 56 control each other, for example to interrupt a charging or discharging process or to switch to a different charging mode.
- the monitoring unit 56 controls a load 60 which is connected to the first and the second energy supply contact 38, 40 of the further interface 20 and to which the exchangeable battery pack voltage UBatt is present.
- the load 60 can be designed, for example, as a power output stage that applies a pulse-width-modulated signal to an electric motor to change its speed and/or torque, which has a direct influence on the discharge current I of the replaceable battery pack 10 .
- another energy-consuming load 60 is also conceivable. Numerous variants of possible electrical loads are known to a person skilled in the art, so that there is no need to go into further detail here.
- the replaceable battery pack 10 plugged into a charger 16 can be charged with the charging current I and the voltage UBatt corresponding to the replaceable battery pack 10 .
- the charging device 16 or its power pack 62 is provided with a mains connection (not shown).
- the voltage UBatt present at the power supply contacts 38, 40 can be measured using a voltage measuring device 64 in the charging device 16 and evaluated by the monitoring unit 56.
- the voltage measuring device 64 can also be completely or partly in the monitoring unit 56 of the charger 16 be integrated, for example in the form of an integrated ADC.
- the exact configuration of the power pack 60 of the charging device 16 is known to the person skilled in the art and is of secondary importance for the invention. Therefore, it will not be discussed further here.
- the replaceable battery pack 10 has at least one first switching element 66, which is activated by the monitoring unit 52 via one of a second and a third switching element 68, 70 existing half-bridge 72 can be opened to interrupt the charging or discharging current I and closed to enable the charging or discharging current I.
- the at least one first switching element 66 is arranged in the ground path (low side) between the second contact 12 embodied as a power supply contact 40 of the electromechanical interface 14 and a ground contact point 74 of the SCM preliminary stage 44 .
- At least one first switching element 66 in the high-side path between the tap 50 of the SCM preliminary stage 44 and the first contact 12 of the electromechanical interface 14 embodied as a power supply contact 38 .
- a plurality of first switching elements 66 can be arranged both in the low-side path and in the high-side path.
- the at least one first switching element 66 is preferably embodied as a MOSFET.
- other switching elements such as a relay, an IGBT, a bipolar transistor or the like are also conceivable.
- the two switching elements 68, 70 of the half-bridge 72 are also preferably embodied as MOSFETs.
- other second and third switching elements 68, 70 such as relays, IGBTs, bipolar transistors or the like, are also conceivable.
- the second switching element 68 embodied as a high-side switch of the half-bridge 72 is a P-channel MOSFET and the third switching element 70 embodied as a low-side switch of the half-bridge 72 is an N-channel MOSFET.
- the at least one first switching element is now activated by the monitoring unit 52 66 opened by closing the third switching element 70.
- the monitoring unit 52 can also open the second switching element 68, but this is not absolutely necessary. Conversely, the monitoring unit 52 enables the charging or discharging current I by closing the at least one first switching element 66 by closing the second switching element 68 with the third switching element 70 open.
- the half-bridge 72 is connected on the one hand to the reference potential GND and on the other hand to the supply potential V+ via a protective diode 78 and a first resistor 80 and a second resistor 82, with a tap 84 between the first and second resistors 80, 82 serving as a connection point for a Capacitor 86 is used, which in turn is connected to the second power supply contact 40 of the electromechanical interface 14.
- the capacitor 86, the second resistor 82 and the half-bridge 72 are connected in parallel with the at least one first switching element 66. Furthermore, a tap 76 between the two switching elements 68, 70 of the half-bridge 72 is connected via a third resistor 90 to a control input of the at least one first switching element 66, in particular to a gate terminal of the MOSFET.
- the first resistor 80 and the capacitor 86 in turn form an RC element 88 whose time constant T results from the product of the resistance value Ri of the first resistor 80 and the capacitance Ci of the capacitor 86 .
- the time constant T is preferably dimensioned in such a way that there are no unfavorably long charging times for the at least one capacitor 86 for the operation of the replaceable battery pack 10, which could negatively influence switching on of the at least one first switching element 66.
- the resulting avoidance of switching times that are too long or switching potentials that build up too slowly before the at least one first switching element 66 is switched on can effectively reduce the risk of functional impairments or loss of performance of the replaceable battery pack 10 .
- the RC element 88 is decoupled from the supply potential V+ via a protective diode 78, preferably in the form of a Schottky diode.
- the protective diode 78 thus protects the RC element 88 from a short circuit between the supply potential V+ and the ground potential GND.
- the formation of the protective en 78 as a Schottky diode also offers the advantage of a lower voltage drop, so that a higher voltage for switching the at least one first switching element 66 is available.
- the tap 84 between the first and the second resistor 80, 82 simultaneously forms a center tap of the RC element 88 to which a decoupled switching potential Vs for switching the at least one first switching element 66 via the half-bridge 72 is present.
- the first resistor 80 of the RC element 88 is dimensioned in such a way that its resistance value Ri in the event of a short circuit does not result in any heat development that is dangerous for the replaceable battery pack 10 .
- Such a short circuit can, for example, occur internally due to a fault in the capacitor 86 of the RC element 88, due to a fault in the monitoring unit 52 or the half bridge 72, but also externally due to dirty and short-circuited power supply contacts 38, 40.
- the capacitor 86 of the RC element 88 must have a sufficiently high capacitance Ci.
- the capacity Ci is dimensioned in such a way that it is significantly greater than the sum of all capacities of the replaceable battery pack 10 that are charged when the at least one first switching element 66 is switched on. For example, a value of approx. 100 nF for the capacitance Ci would be conceivable.
- values of more than 1 pF for the capacitance Ci are advantageous.
- the high-impedance design of the RC element results in an advantage in that the switching potential Vs for the at least one switching element 66 is largely decoupled from short circuits on or in the replaceable battery pack 10 .
- the switching potential Vs can now be applied by the monitoring unit 52 via the half-bridge 72 and the second and third resistors 82, 90 in the manner described to a control input of the at least one first switching element 66, for example to the gate connection of a MOSFET, in order to to open.
- the second and third resistors are 82 or 90 are dimensioned in such a way that, due to their resulting resistance value R2 + F, on the one hand the switching current required for fast switching of the at least one first switching element 66 is not too low and on the other hand in the event of a short circuit or if the second and third switching elements 68 are accidentally switched on at the same time, 70 of the half-bridge 72 does not generate heat that is dangerous for the exchangeable battery pack 10 .
- the resulting resistance value F+Rs of the second and third resistors 82, 90 is preferably significantly less than 1 k ⁇ .
- an optimized dimensioning of the second resistor 82 has the effect that the currents that can occur as a result of the switching of the second switching element 68 designed as a high-side switch do not entail excessive component stress, which can lead to premature aging of the second switching element 68 in particular and of the second resistor 82 and thus could lead to damage to the replaceable battery pack 10.
- the second and third resistors 82, 90 only a single resistor can be used. Likewise, several resistances are also conceivable. The same applies to the number of capacitors and resistors in the RC element.
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21839944.2A EP4264772A1 (de) | 2020-12-21 | 2021-12-16 | Wechselakkupack mit zumindest einem schaltelement zur unterbrechung bzw. ermöglichung eines lade- oder entladestroms |
| US18/257,225 US20240030730A1 (en) | 2020-12-21 | 2021-12-16 | Removable Battery Pack Comprising at least one Switching Element for Interrupting or Enabling a Charging or Discharging Current |
| CN202180086732.5A CN116783789A (zh) | 2020-12-21 | 2021-12-16 | 具有用于中断或启用充电电流或者放电电流的至少一个开关元件的可更换蓄电池组 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020216369.3 | 2020-12-21 | ||
| DE102020216369.3A DE102020216369A1 (de) | 2020-12-21 | 2020-12-21 | Wechselakkupack mit zumindest einem Schaltelement zur Unterbrechung bzw. Ermöglichung eines Lade- oder Entladestroms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022136082A1 true WO2022136082A1 (de) | 2022-06-30 |
Family
ID=79287905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2021/086067 Ceased WO2022136082A1 (de) | 2020-12-21 | 2021-12-16 | Wechselakkupack mit zumindest einem schaltelement zur unterbrechung bzw. ermöglichung eines lade- oder entladestroms |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240030730A1 (de) |
| EP (1) | EP4264772A1 (de) |
| CN (1) | CN116783789A (de) |
| DE (1) | DE102020216369A1 (de) |
| WO (1) | WO2022136082A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12122251B2 (en) | 2022-09-28 | 2024-10-22 | BorgWarner US Technologies LLC | Systems and methods for bidirectional message architecture for inverter for electric vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002078210A (ja) * | 2000-08-28 | 2002-03-15 | Rohm Co Ltd | 二次電池の充放電保護回路 |
| DE10354871A1 (de) | 2002-11-22 | 2004-10-28 | Milwaukee Electric Tool Corp., Brookfield | Verfahren und System für den Schutz einer Batterie |
| US20120229945A1 (en) * | 2011-03-13 | 2012-09-13 | Atsushi Sakurai | Charge/discharge control circuit and battery assembly |
| US20130229144A1 (en) * | 2012-03-02 | 2013-09-05 | Hitachi Ulsi Systems Co., Ltd. | Secondary-battery monitoring device and battery pack |
| US20160344205A1 (en) * | 2015-05-21 | 2016-11-24 | Mitsumi Electric Co., Ltd. | Battery protection integrated circuit, battery protection apparatus and battery pack |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5061935B2 (ja) | 2008-02-12 | 2012-10-31 | ミツミ電機株式会社 | 電池パック |
-
2020
- 2020-12-21 DE DE102020216369.3A patent/DE102020216369A1/de active Pending
-
2021
- 2021-12-16 US US18/257,225 patent/US20240030730A1/en active Pending
- 2021-12-16 WO PCT/EP2021/086067 patent/WO2022136082A1/de not_active Ceased
- 2021-12-16 CN CN202180086732.5A patent/CN116783789A/zh active Pending
- 2021-12-16 EP EP21839944.2A patent/EP4264772A1/de active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002078210A (ja) * | 2000-08-28 | 2002-03-15 | Rohm Co Ltd | 二次電池の充放電保護回路 |
| DE10354871A1 (de) | 2002-11-22 | 2004-10-28 | Milwaukee Electric Tool Corp., Brookfield | Verfahren und System für den Schutz einer Batterie |
| US20120229945A1 (en) * | 2011-03-13 | 2012-09-13 | Atsushi Sakurai | Charge/discharge control circuit and battery assembly |
| US20130229144A1 (en) * | 2012-03-02 | 2013-09-05 | Hitachi Ulsi Systems Co., Ltd. | Secondary-battery monitoring device and battery pack |
| US20160344205A1 (en) * | 2015-05-21 | 2016-11-24 | Mitsumi Electric Co., Ltd. | Battery protection integrated circuit, battery protection apparatus and battery pack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116783789A (zh) | 2023-09-19 |
| DE102020216369A1 (de) | 2022-06-23 |
| EP4264772A1 (de) | 2023-10-25 |
| US20240030730A1 (en) | 2024-01-25 |
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