Loading patent…
AssigneeSony Corporation
InventorsEiji Kumagai, Akira Sampei, Kazuharu Yanagihara
Estimating the term…
A battery monitor circuit includes a first monitoring unit for detecting voltages of battery cells in a first group, a second monitoring unit for detecting voltages of battery cells in a second group, and a current cancellation unit for canceling a difference between first and second currents that flow through the first and second monitoring units, respectively. One terminal of a series connection of the battery cells in the first and second groups and one terminal of the first monitoring unit are connected, the other terminal of the first monitoring unit and one terminal of the second monitoring unit are connected, and the other terminal of the second monitoring unit and the other terminal of the series connection are connected. The current cancellation unit is disposed between a connection point between the first and second monitoring units and a middle connection point in the middle of the series connection.
A battery monitor circuit comprising:
A storage apparatus comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
No references of this kind are recorded.
Acting upon multiple batteries simultaneously or sequentially: for charge balancing, e.g. equalisation of charge between batteries
Using propulsion power supplied by batteries or fuel cells: characterised by AC-motors
Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of…
Circuit arrangements for DC mains or DC distribution networks: parallel operation of DC sources
About 6 years 4 months of term left · ends 4 Mar 2033 (estimated)
The present application claims priority to Japanese Priority Patent Application JP 2011-145140 filed in the Japan Patent Office on Jun. 30, 2011, the entire content of which is hereby incorporated by reference.
The present disclosure relates to a battery monitor circuit, a storage apparatus, and an electronic apparatus, an electric-powered vehicle, and a power system which use power from the storage apparatus.
The application of secondary batteries such as lithium-ion batteries has rapidly expanded to a power storage apparatus that uses a new energy system such as a solar battery or a wind power generator with a secondary battery and a vehicle storage battery. In a case where many storage elements such as unit batteries (that are also referred to as electric cells or cells and will be hereinafter referred to as battery cells) are used so as to obtain high output power, a structure in which a plurality of storage modules are connected in series is employed. A storage module is formed of battery blocks each including a plurality of battery cells, for example, four battery cells connected in parallel and/or series. Many battery blocks are included in an exterior case, so that a storage module (also referred to as an assembled battery) is formed.
FIG. 1 is a block diagram describing the problem of a monitor circuit;
FIG. 2 is a block diagram of an example of a storage system;
FIG. 3 is a block diagram of another example of a storage system;
Embodiments to be described below are preferred embodiments of the present disclosure and various technically-preferable limitations are given. However, it should be noted that the scope of the present disclosure is not limited to these embodiments unless a description limiting the present disclosure is given in the following description.
[Outline of Storage System]
In a case where many storage elements such as battery cells are used so as to obtain high output power, a structure in which a plurality of storage modules are connected and a common control apparatus is disposed for these storage modules is employed. The structure will be hereinafter referred to as a battery system. A storage module includes a plurality of battery cells such as lithium-ion secondary batteries and a controller.