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Power battery system

A technology of power battery and single battery, which is applied in the direction of secondary battery, battery pack parts, battery circuit device, etc.

Inactive Publication Date: 2018-08-24
朱履明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, there is no power battery system that can effectively overcome the above defects

Method used

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Embodiment 1

[0043] This embodiment provides a power battery system, such as figure 1 As shown, it includes: a magnetic latching relay, a magnetic latching relay control module, several first switches K1, several second switches K2, several third switches K3, and several first single cells S1;

[0044] A first switch K1 is connected in series between the positive electrodes of every two adjacent first single cells S1; a second switch is connected in series between the negative electrodes of every two adjacent first single cells S1 K2; and along the current flow direction, a third switch K3 is connected in series between the negative pole of the previous first single battery S1 and the positive pole of the adjacent first single battery S1; the first single battery in the application The battery S1 may be a lead-acid battery, which is not limited in this embodiment.

[0045] The magnetic latching relay includes a plurality of first contacts and a plurality of second contacts, each of the fi...

Embodiment 2

[0087] On the basis of Example 1, such as figure 2 As shown, the power battery system in the embodiment of the present invention also includes a fourth diode D4, and the cathode of the fourth diode D4 is electrically connected to a negative connection line of the adjustable voltage module (in application, it can be a control unit negative pin), the anode of the fourth diode D4 is electrically connected to the negative bus.

[0088] Because when the detection voltage is common negative, the unidirectional conduction is expected to have a threshold voltage of 0.3-0.5V. By setting a unidirectional current diode on the detection auxiliary line, the chip can be effectively protected. When the detection voltage is common positive, it may or may not be set.

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Abstract

The embodiment of the invention provides a power battery system. First switches K1 and second switches K2 are driven to be turned on after the second contact of a magnetic latching relay is sucked down, a first contact is disconnected at the sucking down moment of the second contact, corresponding third switches K3 are turned off, the positive electrodes of all first single batteries S1 are connected through the corresponding first switches K1, the negative electrodes of all first single batteries S1 are connected through a corresponding second switch K2, and the first single batteries S1 areconnected in parallel; and after the first contact is sucked down to drive the third switches K3 to be turned on, the second contact is disconnected at the sucking down moment of the first contact, the first switches K1 and the second switches K2 are also turned off, and the first single batteries S1 are connected in series via the third switches K3. The power battery system utilizes the characteristic that the multiple contacts are simultaneously opened or closed when the magnetic latching relay is turned over, so the system has the advantages of shortening the series and parallel connectionswitching time between the single batteries, low energy consumption, high efficiency and good stability.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a power battery system. Background technique [0002] With the development of society, the application of power batteries is becoming more and more extensive, and they are used in electric vehicles, electric bicycles, electric tools and even electric trains. [0003] Since the cadmium in nickel-cadmium batteries (Ni-Cd) is toxic, the disposal of waste batteries is complicated and the environment is polluted. The "cadmium-free internal formation process" is required in the production process, but this also leads to more and more prominent problems such as sulfuration of the negative electrode of the power battery, single lagging, and poor temperature performance, which makes the life of the power battery significantly shorter than before. Experiments have shown that , The service life of a single battery is only 350 cycles, and it is as low as 250 cycles when used in seri...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/44H01M2/20H02J7/00H01M50/514H01M50/59
CPCH02J7/0027H01M10/4207H01M10/425H01M10/441H01M50/50Y02E60/10
Inventor 朱履明
Owner 朱履明
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