Hybrid storage system

Patent metadata

Field	Value
Publication number	US-2017070081-A1
Application number	US-201415123158-A
Country	US
Kind code	A1
Filing date	Mar 6, 2014
Priority date	Mar 6, 2014
Publication date	Mar 9, 2017
Grant date	—

Abstract

A battery charging apparatus. The apparatus includes two or more hybrid battery charging devices. Each hybrid battery charging device includes input terminals for connecting a photovoltaic panel, first battery connections for connecting a lead-acid battery, second battery connections for connecting a high-cycle chemical battery, a two-way DC/DC converter, a charge and discharge control system, which is connected to the two-way DC/DC converter, and output terminals for connecting a load.

First claim

1 - 38 . (canceled)

39 . A battery charging apparatus comprising
at least two hybrid battery charging devices, each hybrid battery charging device including:
input terminals for connecting a photovoltaic panel;
first battery connections for connecting a lead-acid battery;
second battery connections for connecting a high-cycle chemical battery;
a two-way DC/DC converter, wherein a first set of terminals of the two-way DC/DC converter is connected with the second battery connections, and wherein a second set of terminals of the two-way DC/DC converter is connected with the first battery connections;
a charge and discharge control system, which is connected to the two-way DC/DC converter; and
output terminals for connecting a load, wherein an input to the output terminals is derived from the first battery connections.

40 . The battery charging apparatus according to claim 39 , wherein the output terminals of the at least two hybrid battery charging devices are connected in parallel.

41 . The battery charging apparatus according to claim 39 , wherein the input terminals of the at least two hybrid battery charging devices are connected in series.

42 . The battery charging apparatus according to claim 39 further comprising the high-cycle chemical battery.

43 . The battery charging apparatus according to claim 42 , wherein the high-cycle chemical battery comprises a lithium battery.

44 . The battery charging apparatus according to claim 39 , wherein each hybrid battery charging device further comprises a control device which is connected to the charge and discharge control system, wherein input terminals of the control device are connected to the input terminals, and wherein output terminals of the control device are connected to input terminals of the two-way DC/DC converter.

45 . The battery charging apparatus according to claim 44 , wherein the control device comprises a pulse width modulation.

46 . The battery charging apparatus according to claim 44 , wherein the control device comprises a maximum power point tracker.

47 . The battery charging apparatus according to claim 44 , wherein the control device comprises a controllable switch.

48 . The battery charging apparatus according to claim 44 , wherein the control device comprises a one-way DC/DC converter.

49 . The battery charging apparatus according to claim 39 , wherein the two-way DC/DC converter comprises a buck-boost converter, a buck converter, a boost converter or another converter topology.

50 . The battery charging apparatus according to claim 39 , wherein the two-way DC/DC converter comprises at least two semi-conductor switches, wherein respective input connections of the transistors are connected to the charge control system.

51 . The battery charging apparatus according to claim 39 , wherein the hybrid battery charging devices further include:
first voltage measuring connections for connecting a first voltage sensor, the first voltage sensor being connected to terminals of the lead-acid battery and the first voltage measuring connections being connected to the charge and discharge control system, second voltage measuring connections for connecting a second voltage sensor, the second voltage sensor being connected to terminals of the high-cycle chemical battery and the second voltage measuring connections being connected to the charge and discharge control system.

52 . The battery charging apparatus according to claim 39 , wherein the hybrid battery charging devices further include:
a separate battery management system for the high-cycle chemical battery, the separate battery management system being connected to the charge and discharge control system.

53 . The battery charging apparatus according to claim 53 , wherein one battery management system of one of the hybrid battery charging devices is provided as a master controller and the other battery management system of the other of the hybrid battery charging devices is provided as a slave controller.

54 . A storage system, comprising:
a battery charging apparatus including at least two hybrid battery charging devices, each hybrid battery charging device including input terminals for connecting a photovoltaic panel, first battery connections for connecting a lead-acid battery, second battery connections for connecting a high-cycle chemical battery, a two-way DC/DC converter, wherein a first set of terminals of the two-way DC/DC converter is connected with the second battery connections, and wherein a second set of terminals of the two-way DC/DC converter is connected with the first battery connections, a charge and discharge control system, which is connected to the two-way DC/DC converter, and output terminals for connecting a load, wherein an input to the output terminals is derived from the first battery connections; and a lead-acid battery being connected to the battery charging apparatus.

55 . The storage system according to claim 54 , wherein the hybrid battery charging devices further include a high-cycle chemical battery.

56 . The storage system according to claim 55 , wherein the high-cycle chemical battery includes a lithium battery.

57 . The storage system according to claim 55 , wherein one capacitor is connected in parallel to the high-cycle chemical battery.

58 . The storage system according to claim 54 , wherein a first voltage sensor is connected to a terminal of first battery connections and to a charge and discharge control system of the hybrid battery charging device, and a second voltage sensor is connected to a terminal of second battery connections and to the charge and discharge control system of the hybrid battery charging device.

59 . A battery charging apparatus, comprising:
at least one hybrid battery charging device, the hybrid battery charging device including:
input terminals for connecting a photovoltaic panel,
first battery connections for connecting a lead-acid battery,
second battery connections for connecting a high-cycle chemical battery,
a two-way DC/DC converter with an adjustable voltage conversion ratio, wherein a first set of terminals of the two-way DC/DC converter is connected with the second battery connections, and wherein a second set of terminals of the two-way DC/DC converter is connected with the first battery connections,
a charge and discharge control system, which is connected to the two-way DC/DC converter, and
output terminals for connecting a load, wherein an input to the output terminals is derived from the first battery connections,
wherein the charge and discharge control system includes a first device for providing at least one electrical measurement of the first battery connections, a second device for providing at least one electrical measurement of the second battery connections, and a processor being adapted to adjust the voltage conversion ratio of the two-way DC/DC converter according to the at least one lead-acid battery electrical measurement and to the at least one high-cycle chemical battery electrical measurement.

60 . The battery charging apparatus according to claim 59 , wherein the first device comprises a voltage measurement device.

61 . The battery charging apparatus according to claim 59 , wherein the first device comprises an electrical current measurement device.

62 . The battery charging apparatus according to claim 59 , wherein the second device comprises a voltage measur

Assignees

• Bosch Gmbh Robert

Inventors

• Cher Jingting
• Kufner Annika Carolin
• Sengebusch Falco
• Chouthe Sumedha
• Wang Xingchi
• Li Yanlin

Classifications

• H02S40/38

  Energy storage means, e.g. batteries, structurally associated with PV modules · CPC title

• H02J7/35

  with light sensitive cells · CPC title

• H02S40/32

  comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules · CPC title

• H02J2101/25

  involving maximum power point tracking control for photovoltaic sources · CPC title

• H02J7/045 Primary

  Electricity · mapped topic