Unlock instant, AI-driven research and patent intelligence for your innovation.

Battery control device

A technology of battery control and secondary battery, which is applied in the direction of control devices, battery/fuel cell control devices, battery circuit devices, etc., and can solve problems such as internal short circuit and reduction of battery charge and discharge capacity

Active Publication Date: 2021-09-14
日本汽车能源株式会社
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precipitation of lithium metal reduces the amount of lithium ions that should be used for charging and discharging, so the chargeable and discharging capacity of the battery decreases
Furthermore, if the deposition of lithium metal on the negative electrode continues, the lithium metal will grow in the form of icicles and come into contact with the positive electrode side, which may cause an internal short circuit in the worst case.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Battery control device
  • Battery control device
  • Battery control device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0041] figure 1 It is a diagram showing the configuration of the battery system 100 and its surroundings according to one embodiment of the present invention. The battery system 100 is connected to an inverter 400 via relays 300 , 310 . The battery system 100 includes an assembled battery 110 , a cell management unit 120 , a current detection unit 130 , a voltage detection unit 140 , an assembled battery control unit 150 , and a storage unit 180 .

[0042] The assembled battery 110 is composed of a plurality of single cells 111 . The cell management unit 120 monitors the state of the cell 111 . The current detection unit 130 detects the current flowing through the battery system 100 . The voltage detection unit 140 detects the total voltage of the assembled battery 110 . The assembled battery control unit 150 detects the state of the assembled battery 110 and also manages the state.

[0043] The assembled battery 110 is configured by electrically connecting a plurality of...

no. 2 Embodiment approach ＞

[0117] Next, a second embodiment of the present invention will be described. Precipitation of metallic lithium also largely depends on the temperature of the battery. Therefore, in this embodiment, an example in which the upper limit voltage is calculated in consideration of the temperature of the battery in addition to the voltage history of the battery will be described. In addition, the configuration of the battery system of the present embodiment has the assembled battery control unit 150 a instead of the assembled battery control unit 150 , and is the same as that described in the first embodiment except that. figure 1 The battery system 100 is the same. Hereinafter, the contents of this embodiment will be described focusing on the differences between the assembled battery control units 150 and 150a.

[0118] Figure 10 It is a diagram showing the functional configuration of the assembled battery control unit 150a according to the second embodiment of the present invent...

no. 3 Embodiment approach ＞

[0128] Next, a third embodiment of the present invention will be described. Precipitation of lithium metal also largely depends on the current value during charging. Therefore, in this embodiment, the upper limit voltage is calculated by considering the current flowing to the battery in addition to the voltage history and temperature of the battery. Example to illustrate. In addition, the configuration of the battery system of the present embodiment has the assembled battery control unit 150b instead of the assembled battery control unit 150, and is similar to that described in the first and second embodiments except that figure 1 The battery system 100 is the same. Hereinafter, the content of this embodiment will be described centering on the difference between the assembled battery control units 150 and 150a.

[0129] Figure 14 It is a diagram showing the functional configuration of the assembled battery control unit 150b according to the third embodiment of the present ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The purpose is to set an appropriate upper limit voltage in order to obtain the best charging performance from a secondary battery while effectively suppressing degradation of the secondary battery. An assembled battery control unit 150 determines an upper limit voltage during charging of the secondary battery and operates the chargeable power of the secondary battery on the basis of the upper limit voltage. The assembled battery control unit 150 comprises an upper limit voltage operation unit 152 that operates a voltage history of the secondary battery on the basis of the time-series data of the secondary battery voltage and operates the upper limit voltage on the basis of the voltage history.

Description

technical field [0001] The present invention relates to battery control devices. Background technique [0002] Battery systems installed in electric vehicles (EV), plug-in hybrid vehicles (PHEV), hybrid electric vehicles (HEV), etc. generally consist of multiple secondary batteries connected in series or in parallel and various electrical components. Electrical components include relays for controlling the on-off of the electrical connection between the battery and the load, sensors for measuring the current and voltage of the battery, battery control devices for controlling the charge and discharge of the battery, and the like. [0003] In order to use the battery within an appropriate range, the battery control device sets a limit value (upper limit voltage) for the battery voltage, and performs charge and discharge control of the battery within the range of the upper limit voltage. Accordingly, overcharging of the battery is prevented, and deterioration of the battery is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48H02J7/00B60L58/14G01R31/3842
CPCY02T10/70H01M10/48Y02E60/10H02J2310/48H02J7/00308H02J7/0047H02J7/007182H01M10/44H01M2220/20B60L2240/545B60L2240/547B60L2240/549B60L58/12B60L58/16B60L58/21B60L50/64B60L58/14
Inventor 中尾亮平大川圭一朗有岛康夫佐佐木宽文
Owner 日本汽车能源株式会社