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Battery pack, battery pack connection method, and battery pack charging and discharging management method

A charge and discharge management and battery pack technology, which is applied in the direction of secondary battery charging/discharging, battery circuit devices, and secondary battery repair/maintenance, etc. Damage and other problems, to achieve the effect of improving energy utilization efficiency, realizing self-similar expansion, and expanding the scope of application

Active Publication Date: 2015-12-23
江苏赣锋动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 3) Floating charge equalization: cannot effectively provide floating charge equalization
[0016] (1) In the discharge working state, the switching of the battery will cause the battery pack to be disconnected instantaneously, and the impact caused by frequent circuit disconnection and connection may cause damage to the electrical equipment;
[0017] (2) The working current of the battery pack is restricted by the performance of the switching device

Method used

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  • Battery pack, battery pack connection method, and battery pack charging and discharging management method
  • Battery pack, battery pack connection method, and battery pack charging and discharging management method
  • Battery pack, battery pack connection method, and battery pack charging and discharging management method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1 The battery pack includes N single cells with the same specifications and models, the N cells are arranged in series, and the numbers are respectively 1 to N, and N is a positive integer greater than or equal to 2, and between the N cells Also through several switches S i, n Connected to form an internal circuit of the battery pack. In this embodiment, n is selected from 1, 2 or 3, which can be defined as the first switch, the second switch and the third switch, respectively, i = any integer value from 1 to N , Which corresponds to the number of any battery in the battery pack.

[0066] Further speaking, see figure 2 In the battery pack, one pole of each battery is electrically connected to one pole of a redundant battery cell through a first switch, and the other pole is electrically connected to the other pole of the redundant battery cell through a second switch, and One pole of the first battery (battery 1) is also electrically connected to one end of t...

Embodiment 2

[0085] Example 2 see image 3 The battery pack also includes N single cells with the same specifications and models, the N cells are arranged in series, and their numbers are respectively 1 to N, and N is a positive integer greater than or equal to 2, and there is also After several switches S i, n Connected to form an internal circuit of the battery pack. In this embodiment, n is selected from 1 or 2, which can be defined as the first switch and the second switch respectively. i=1 to any integer value in the range of N, which corresponds to any The number of the battery in the battery pack.

[0086] Furthermore, in the battery pack, one pole of each battery is electrically connected to one pole of a redundant battery cell through a first switch, and the other pole is electrically connected to the other pole of the redundant battery cell through a second switch. Connected, and one pole of the first battery (battery 1) is electrically connected to one end of the load and / or char...

Embodiment 3

[0088] Embodiment 3 The structure of the battery pack involved in this embodiment is basically the same as that of Embodiment 2, but one pole of each battery is also electrically connected to one pole of the redundant battery unit via a first switch and a current limiting circuit. The battery pack can be further expanded to Figure 5 The frame structure is shown, and it works according to the method described in Example 2.

[0089] With this embodiment of the battery pack circuit design, the operating current of the entire battery pack is further deviated from the performance constraints of the switching device, or, specifically, the current passing through the switch is only the equalizing current of the battery pack, and the current limiting circuit will equalize the current Restricted to the range that the switching device can withstand, the maximum current of the battery pack is only restricted by the performance of the battery itself. Example: The switching device withstands...

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Abstract

The invention provides a novel battery pack, a battery pack connecting method, and a battery pack charge and discharge management method. The battery pack comprises a plurality of dry batteries in series connection, wherein one electrode of each battery is electrically connected with one electrode of a redundant battery unit via a first switch, the other electrode of the battery is electrically connected with another electrode of the redundant battery unit via a second switch, one electrode of a first battery is electrically connected with a load and / or one end of a charging power supply, another electrode of a last battery is electrically connected with the load and / or another end of the charging power supply, and in addition, an electrode of each battery is electrically connected with another electrode of another battery in front of the battery. The battery pack charge and discharge management method can be applied to carry out charging and discharging management on the above battery pack, the charging and discharging management on the battery pack can be realized well, the charging equalization, the discharge equalization and the dynamic equalization are effectively realized, thus the use performance and life of the battery pack are prolonged, the efficiency of energy use is raised, and the application rang of the battery pack can be effectively expanded.

Description

Technical field [0001] The invention relates to a battery pack and a management method thereof, in particular to a battery pack, a battery pack connection method and a battery pack charge and discharge management method. Background technique [0002] In order to provide sufficient voltage to the device, the battery pack is usually made up of multiple batteries in series, but if the capacity mismatch between the batteries will affect the capacity of the entire battery pack. When the batteries in the battery pack are not balanced, its usable capacity will decrease, and the battery with the lowest capacity in the series battery pack will determine the total capacity of the battery pack. In an unbalanced battery pack, one or several batteries will have reached their maximum capacity while the other batteries still need to be charged. When discharging, the battery that is not fully charged will be discharged before other batteries, so that the battery pack will stop power supply earl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H01M10/42H01M10/44
CPCY02E60/10
Inventor 何磊
Owner 江苏赣锋动力科技有限公司
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