A battery tester includes a pair of battery clamps, a testing unit, and a pair of holsters. Each battery clamp is configured to connect to a terminal of a battery. The testing unit includes testing circuitry that is connected to the battery clamps, and is configured to perform one or more battery tests on a battery connected to the battery clamps. Each of the holsters is attached to a housing of the testing unit, and is configured to receive and hold one of the battery clamps.

An apparatus which diagnoses a battery by detecting an abnormal voltage drop phenomenon of a battery cell includes a voltage measuring circuit, a current measuring circuit, a voltage estimating circuit, and a control circuit. The voltage measuring circuit measures a voltage across both terminals of a battery cell. The current measuring circuit measures the current flowing through either terminal of a battery cell. The voltage estimating circuit, based on current and a status estimation model, calculates an estimated voltage level. The diagnostic circuit calculates a voltage level difference between a voltage level measured by the voltage measuring circuit and an estimated voltage level, and, based on the voltage level difference and a reference value, determines whether or not an error has occurred in the battery cell. The control circuit includes a control circuit which, according to an estimation accuracy of the estimated voltage level, adjusts a reference value.

An apparatus which diagnoses a battery by detecting an abnormal voltage drop phenomenon of a battery cell includes a voltage measuring circuit, a current measuring circuit, a voltage estimating circuit, and a control circuit. The voltage measuring circuit measures a voltage across both terminals of a battery cell. The current measuring circuit measures the current flowing through either terminal of a battery cell. The voltage estimating circuit, based on current and a status estimation model, calculates an estimated voltage level. The diagnostic circuit calculates a voltage level difference between a voltage level measured by the voltage measuring circuit and an estimated voltage level, and, based on the voltage level difference and a reference value, determines whether or not an error has occurred in the battery cell. The control circuit includes a control circuit which, according to an estimation accuracy of the estimated voltage level, adjusts a reference value.

Disclosed is a battery pack in which a fastening recess is provided on a side surface of a vertical frame and a CMU is fastened to the fastening recess, thereby securing rigidity of the vertical frame and maximizing an internal space of the battery pack.

Disclosed is a battery pack in which a fastening recess is provided on a side surface of a vertical frame and a CMU is fastened to the fastening recess, thereby securing rigidity of the vertical frame and maximizing an internal space of the battery pack.

One embodiment is a system for estimating an internal temperature of a battery including a first circuit for receiving a system input signal comprising a measurement of at least one observable quantity associated with the battery and outputting an average battery temperature signal based on the system input signal; and an estimator for receiving the system input signal and the average battery temperature signal and estimating an internal temperature of the battery based on the received signals, wherein the estimator comprises a lumped thermal model of the battery comprising a plurality of parameters.

One embodiment is a system for estimating an internal temperature of a battery including a first circuit for receiving a system input signal comprising a measurement of at least one observable quantity associated with the battery and outputting an average battery temperature signal based on the system input signal; and an estimator for receiving the system input signal and the average battery temperature signal and estimating an internal temperature of the battery based on the received signals, wherein the estimator comprises a lumped thermal model of the battery comprising a plurality of parameters.

An equipment load and a management load imposed on a business operator are reduced, and those who intend to reuse manufactured products can reliably acquire support information necessary for reuse, thereby further promoting the reuse of the manufactured products. A product information management server SV collects attribute information, usage history information, maintenance history information, and CO.sub.2 emission information regarding battery modules manufactured by a plurality of storage battery manufacturers, and stores the information in DBs 31-33 in association with each other. Where an information viewing request is received, reuse support information is generated based on the attribute information, usage history information, maintenance history information and CO.sub.2 emission information of the corresponding battery module, and the generated reuse support information is transmitted to the requestor.

An equipment load and a management load imposed on a business operator are reduced, and those who intend to reuse manufactured products can reliably acquire support information necessary for reuse, thereby further promoting the reuse of the manufactured products. A product information management server SV collects attribute information, usage history information, maintenance history information, and CO.sub.2 emission information regarding battery modules manufactured by a plurality of storage battery manufacturers, and stores the information in DBs 31-33 in association with each other. Where an information viewing request is received, reuse support information is generated based on the attribute information, usage history information, maintenance history information and CO.sub.2 emission information of the corresponding battery module, and the generated reuse support information is transmitted to the requestor.

The present technology provides a method of detecting a battery cell having a low voltage defect, including: setting a reference time point when a voltage of a battery is stabilized after a shipping charge, and measuring a first voltage of a battery cell at the reference time point; measuring a second voltage of the battery cell with a temporal interval longer than a period at which a self discharge of the battery cell is suppressed; and determining whether the battery cell has a low voltage defect by comparing a difference (ΔOCV) between the first voltage and the second voltage with a reference value, wherein the reference value is +3 sigma (σ) to +6 sigma (σ) in a normal distribution of a voltage drop amount obtained by the measuring of the first voltage and the measuring of the second voltage for a plurality of normal sample battery cell groups.