Battery pack
A technology for combining batteries and batteries, which is applied in the direction of secondary batteries, battery overcurrent protection, battery disconnection circuits, etc., can solve the problems of empty battery consumption and large power consumption, and achieve reduced power consumption, reduced power consumption, and shortened Effect of time to detect battery temperature
Inactive Publication Date: 2005-06-22
SANYO ELECTRIC CO LTD
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Problems solved by technology
However, its disadvantage is that if the thermistor as a temperature sensor detects the temperature correctly, the power consumption of the thermistor circuit will be quite large, and the battery will be exhausted.
This circuit structure is: although the thermistor circuit 32 can not consume the electric power of the battery 31, it can only detect the battery temperature with the state connected to the charger 33.
Therefore, the battery temperature can only be detected when the battery 30 is charged
Method used
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[0028] Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below are examples of assembled batteries for actualizing the technical idea of the present invention, and the present invention does not specify the assembled batteries as follows.
[0029] In addition, in order to make it easy to understand the scope of the invention, this specification attaches numbers corresponding to the components shown in the embodiments to the components indicating the "scope of the invention" and the "column for solving the problems". However, the components shown in the scope of the claims are by no means limited to the components of the embodiment.
[0030] Figure 3 ~ Figure 6 The combined battery includes: a secondary battery 1, a temperature sensor 2 that detects the temperature of the battery by a change in resistance, a series resistor 3 that energizes the temperature sensor 2 from the secondary battery 1 built in and...
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The present invention provides an assembled battery capable of accurately detecting the temperature of the battery while reducing power consumption, although the temperature of the battery can be detected during discharge. The assembled battery is connected in series with a temperature sensor (2) thermally bonded to a secondary battery (1) and a series resistor (3), and a protection circuit (4) detects the battery temperature from the resistance change of the temperature sensor (2). The protection circuit (4) includes: a temperature measurement switch (7) connected in series to the series circuit of the series resistor (3) and the temperature sensor (2), a sample and hold circuit (8) for detecting and maintaining the voltage of the measurement point (6), and a timing circuit (9) for controlling the sampling and holding circuit (8) to sample and hold the timing of detecting the voltage and the timing of switching the temperature measurement switch (7) to conduction. The combined battery is: the timing circuit (9) switches the temperature measurement switch (7) to conduction / disconnection in a certain period, and the detection voltage sampled and held by the sample and hold circuit (8) is used to detect the temperature during the timing of switching to conduction. Check battery temperature.
Description
technical field [0001] The present invention relates to an assembled battery built with a temperature sensor for detecting the temperature of the battery. Background technique [0002] A battery pack with a built-in temperature sensor detects an abnormal rise in battery temperature by the temperature sensor. If the temperature of the battery abnormally rises above the set temperature, the combined battery can cut off the current flowing through the battery for safe use. Since the resistance of the temperature sensor changes with temperature, the temperature of the battery can be detected by detecting the resistance. The NTC thermistor, one of the temperature sensors, becomes less resistant as the temperature becomes higher. The temperature of the battery can be detected by contacting the NTC thermistor to the surface of the battery and detecting the resistance of the NTC thermistor. An assembled battery with a built-in temperature sensor is described, for example, in the ...
Claims
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IPC IPC(8): H01M10/48H01M50/569H02H5/04H02H7/18H02J7/00
CPCH01M10/486H02H5/042H02H7/18H02J7/0031H02J7/00304H02J7/00306Y02E60/10H01M50/569H01M10/443
Inventor 山本洋由
Owner SANYO ELECTRIC CO LTD