摘要:
An authentication system is provided with a server device for generating a random number used for authentication and check data obtained by encrypting the random number using an encryption key, an authentication device for authenticating a device to be authenticated by transmitting the random number transmitted from the server device to the device to be authenticated and comparing reply data transmitted from the device to be authenticated with check data transmitted from the server device, and the device to be authenticated for encrypting the random number transmitted from the authentication device using the encryption key and transmitting the encrypted random number as reply data.
摘要:
A rechargeable battery (2) and a circuit substrate (3) are connected by lead plates (4, 5) and united by a primary mold (11) that is formed by filling resin therebetween, after which a secondary mold (12) is formed on the outer face by filling resin at necessary locations and a winding sheet (13) is wound around the periphery, thereby forming a battery pack.
摘要:
A rechargeable battery (2) and a circuit substrate (3) are connected by lead plates (4, 5) and united by a primary mold (11) that is formed by filling resin therebetween, after which a secondary mold (12) is formed on the outer face by filling resin at necessary locations and a winding sheet (13) is wound around the periphery, thereby forming a battery pack.
摘要:
An outer case (10, 20, 35, 40) for housing a rechargeable battery (1, 31, 41) and a battery circuit therein is composed of an upper case (7, 21, 42) and a lower case (8, 22, 43), each being formed as a half-shell body. The respective bottom faces of the upper case (7, 21, 42) and the lower case (8, 22, 43) are formed of film members (7b, 8b, 32, 34, 42b, 43b), and are integrally formed with resin moldings (7a, 8a, 33, 42c, 43c) forming circumferential side faces.
摘要:
A secondary battery is protected from overcharging and excessive discharge current by a simple circuit. A comparator (CMP1) detects overcharging by comparing a charging voltage. (Vc) of a secondary battery (6) with a reference voltage (Vref1). A transistor (Q1) is turned on to turn the heater (R2) on if overcharging is detected by the comparator (CMP1). A PTC element (SW1) is turned off to cut off a charge current when being heated by the heater to reach a specified operating temperature (Tsw1). On the other hand, when a discharge current from the secondary battery (6) becomes excessive, the PTC element (SW1) self-heats by the discharge current and is turned off to cut off a discharge current upon reaching the operating temperature (Tsw1).
摘要:
Constructing a battery pack by: providing a resin sheet (40) to cover a release opening (20a) of a safety vent (20) formed on a sealing plate (23); integrating a rechargeable battery (2) and a circuit substrate (3) with a primary molding (11) by filing a resin between the rechargeable battery (2) and the circuit substrate (3); and then forming a secondary molding (12). In such constructed battery pack, an ejected gas, at the operation of the safety vent (20) of the battery pack, is externally released through an interface between the resin and metal.
摘要:
Constructing a battery pack by: providing a resin sheet (40) to cover a release opening (20a) of a safety vent (20) formed on a sealing plate (23); integrating a rechargeable battery (2) and a circuit substrate (3) with a primary molding (11) by filing a resin between the rechargeable battery (2) and the circuit substrate (3); and then forming a secondary molding (12). In such constructed battery pack, an ejected gas, at the operation of the safety vent (20) of the battery pack, is externally released through an interface between the resin and metal.
摘要:
A rechargeable battery (2) and a circuit substrate (3) are connected by lead plates (4, 5) and united by a primary mold (11) that is formed by filling resin therebetween, after which a secondary mold (12) is formed on the outer face by filling resin at necessary locations and a winding sheet (13) is wound around the periphery, thereby forming a battery pack.
摘要:
A control circuit detects the battery voltage E1 of the rechargeable battery, and the terminal voltage E2 across the input/output terminals that are connected to the rechargeable battery through a charge/discharge circuit. When the battery voltage E1 is lower than a charge-prohibiting voltage and higher than a discharge-prohibiting voltage, the control circuit turns on the first and second FETS, which are connected in series to the charge/discharge circuit. When the battery voltage E1 is higher than the charge-prohibiting voltage, the first FET is turned off, and when the battery voltage is higher than the terminal voltage, the first FET is turned on. When the battery voltage E1 is lower than the discharge-prohibiting voltage, the second FET is turned off, and when the battery voltage E1 is higher than the terminal voltage E2, the second FET is turned on.
摘要:
A protection circuit is provided for protecting a secondary battery from overcharging and excessive discharge current by a simple circuit. The protection circuit is provided with a connection terminal (T3) for connecting the secondary battery (6); a connection terminal (T1) for connecting a charging device for charging the secondary battery (6) and/or a load device driven by a discharge current from the secondary battery (6); a bimetal switch (SW1) that is provided between the connection terminals (T1, T3) and turned off in the case of exceeding a specified temperature set beforehand; a heater (R2) for heating the bimetal switch (SW1); and an integrated circuit (IC1) for turning the bimetal switch (SW1) off by causing the heater (R2) to generate heat if a voltage applied to the connection terminal (T3) by the secondary battery (6) exceeds a preset reference voltage.