Telefonaktiebolaget Lm Ericsson (publ)

Johan Ulf Mercke

Heino Jean Wendelrup

Kristoffer Ptasinski

Charles Forsberg

Jonas Bengtsson

Michael Kellerman

Jan Ragnar Rubbmark

Bjorn G Frannhagen

Magnus Hans Hansson

Bengt Edholm

Rickard Andersson

Stefan Hellstr&ouml;m

Niclas H&aring;kansson

Sarandis Kalogeropoulus

Monitoring circuit

Method and apparatus for synchronizing communication between a battery and an electronic device are disclosed. Bytes consisting of a number of bits are transmitted between the electronic device and the battery. A predetermined bit sequence is appended to at least some of the bytes prior to transmission. The time interval between given shifts in the predetermined bit sequence is used to synchronize the communication.

Method of synchronizing communications means in a battery to communications means in an electronic device, an apparatus, and a battery

Digital, serial communication over an interface between an electronic device ( ) and a battery ( ) attached thereto comprises transmission of bytes ( ) consisting of a number of bits. Each bit is defined by one of a high level and a low level, and a leading bit ( ) of each byte is of a first one of said high and low levels. The method comprises the step of transmitting the other of the high and low levels for a first period of time ( ) immediately prior to said leading bit ( ). When the leading bit of a byte is always of the same level (i.e. either high or low) and a period of the opposite level precedes the leading bit, it is very easy and simple to ensure that the sending as well as the receiving party is ready for the communication to take place and adjusted to the actual direction of communication.

Method and apparatus enabling communication between an electric device and a battery

An electronic circuit board (,) has a surface. with at least one conducting island (,), and the surface is arranged proximate to a first insulating material (,) having a number of holes (,) which correspond to at least some of the conducting islands (,) and through which the conducting islands (,) may be reached. At an end thereof facing the surface, each hole (,) has an area which is larger than the area of the corresponding conducting island (,). A conducting area (,) adapted to carry off an electrostatic discharge (ESD) is located on the surface proximate to the conducting islands (,) and within the area of the holes (,), and elements (,) of a second insulating material are provided in the holes (,). Thus the electronic circuit board can withstand electrostatic discharges without the circuitry of the board being damaged.

Electronic circuit board, an arrangement comprising an insulating material and an electronic circuit board

A battery system and method are disclosed. The battery system and method include battery means for supplying operating power during battery operation of a battery power receiving device (e.g. a mobile phone). The battery system and method further includes a battery information circuit carried as a unit together with the battery means (e.g. in the form of a so-called battery pack for a mobile phone) for assembly with the battery power receiving device. The battery information circuit includes memory cells and is capable of communicating information with the battery power receiving device. The memory cells include bits encoded to represent an index for a table including battery information; and the battery power receiving device includes a memory capable of storing the table.

Method and an apparatus for storing and communicating battery information

A voltage/current regulator regulates charging of a rechargeable battery in a portable apparatus that includes a transistor and a controller means coupled to the transistor for controlling the charging current to the battery. The controller determines the power dissipation in the transistor of the regulator. If the power dissipation is above a maximum allowed power dissipation, the controller decreases the charging current by a particular current step. Otherwise, the controller determines if the power dissipation will exceed the maximum allowed power dissipation if the charging current is increased by the current step. If not, the controller increases the charging current by the current step.

Voltage/current regulator and method for battery charging

Method and system for communication between a battery power receiving device and a battery pack are disclosed. The battery power receiving device has a battery information circuit that is carried with the battery power receiving device as a single unit. Battery information such as battery identification and capacity are stored in the battery power receiving device and the battery information circuit. The battery power receiving device uses the battery information if the battery identification stored therein coincides with the battery identification stored in the battery information circuit.

Method and apparatus for identifying a battery

A method enables digital, serial communication over an interface between an electronic device (,) and a battery (,) attached thereto. The digital, serial communication comprises transmission of bytes (,) consisting of a number of bits. The method comprises the steps of transmitting a byte from a first one of said electronic device and said battery, receiving said byte in the other of said electronic device and said battery, and retransmitting said received byte unchanged. Hereby, it is possible to compare the contents of the returned byte with the contents of the byte originally transmitted, and thus ensure that the byte was transmitted correctly. This simple procedure makes other error handling procedures such as parity bits unnecessary.

Method enabling communications between an electronic device and a battery, an apparatus comprising an electronic device and a battery, and a battery enabling communication

A battery pack for a portable electric apparatus has one or more than one battery cells and terminals for electric connection to the apparatus. The battery pack has a first terminal for receiving charging current from the apparatus, a second terminal for feeding supply current to the apparatus, and a third terminal for establishing a zero or ground line common to the apparatus and the battery pack. Furthermore, the battery pack has a first voltage converter arranged between the first terminal and the battery cell(s), and a second voltage converter arranged between the second terminal and the battery cell(s).

Battery pack for a portable electric apparatus and a method for the

A safety device for a portable battery-powered electric apparatus having a battery unit with one or more battery cells for supplying power to electric circuitry in the apparatus. The apparatus is connectable to a charging device for charging the battery unit while maintaining the supply of power to the apparatus. The safety device has a first fuse device connected between the battery unit and a first terminal of the apparatus for receiving charging current from the charging device, and a second fuse device connected between the battery unit and a second terminal of the apparatus for supplying power to electric circuitry in the apparatus. The fuse devices are operatively independent of each other, particularly in that the second fuse device maintains the electric connection between the battery unit and the electric circuitry in the apparatus, even when or if the first fuse device releases or opens in response to an undesired condition in the charging device.

Growing community of inventors

Lund, Sweden

Johan Ulf Mercke