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Equalization device, method and battery management system using voltage doubler switch energy storage element

A technology of energy storage components and switching tubes, which can be used in charge equalization circuits, secondary batteries, electrical components, etc., and can solve problems such as slow equalization speed

Active Publication Date: 2021-09-28
HANGZHOU YUANSE TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above three equalization methods, when equalizing the energy of battery cells with different remaining power levels, there will be a problem of slow equalization speed.

Method used

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  • Equalization device, method and battery management system using voltage doubler switch energy storage element
  • Equalization device, method and battery management system using voltage doubler switch energy storage element
  • Equalization device, method and battery management system using voltage doubler switch energy storage element

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Embodiment 1

[0082] Embodiment 1 of the present application provides an energy equalization device, which will be described in detail below with reference to the accompanying drawings.

[0083] see Figure 4 , which is a schematic diagram of an energy equalization device provided in an embodiment of the present application.

[0084] The energy balancing device is applied to a battery unit group 300 ; the device includes: a controller 100 and a balancing circuit 200 .

[0085] see Figure 5 , which is a schematic diagram of another energy equalization device provided in the embodiment of the present application.

[0086] The following takes the battery cell group 300 with two battery cells connected in series as an example to describe in detail.

[0087] The battery unit group 300 at least includes a first battery unit 301 and a second battery unit 302 connected in series; the power of the first battery unit 301 is higher than the power of the second battery unit 302 .

[0088] The foll...

Embodiment 2

[0104] In conjunction with Embodiment 1 of the present application, in Embodiment 2 of the present application, how the controller 100 controls the switching process of the connection state between the first energy storage element and the second energy storage element is introduced in detail.

[0105] see Image 6 , which is a schematic diagram of an equalization circuit provided in an embodiment of the present application.

[0106] The equalization circuit 200 includes a gating circuit 210 .

[0107] The first end of the gating circuit 210 is connected to the first end of the first energy storage element 201, the second end of the gating circuit 210 is connected to the second end of the first energy storage element 201, and the A third end of the gating circuit 210 is connected to the first end of the second energy storage element 202 , and a fourth end of the gating circuit 210 is connected to the second end of the second energy storage element 202 .

[0108] The controlle...

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Abstract

The present application discloses an energy balancing device, method and battery management system, which are applied to a battery unit group; the battery unit group at least includes a first battery unit and a second battery unit connected in series; the remaining power of the first battery unit is higher than that of the second battery unit. The remaining power of the battery unit; the device includes: a controller and a balancing circuit; the balancing circuit at least includes: a first energy storage element and a second energy storage element; the controller is used to control the first The energy storage element is connected in parallel with the second energy storage element, and stores the energy provided by the first battery unit in the equalizing circuit; and increases the energy transfer rate from the energy storage element to the second battery unit. It is also used to control the first energy storage element in series with the second energy storage element when the equalizing circuit connects the second battery unit, and transfer the energy provided by the first battery unit from the equalizing circuit to the second battery unit; improve the energy from the remaining power Higher transfer rate of battery cells to energy storage elements.

Description

technical field [0001] The present application relates to the technical field of equalization circuits, in particular to an energy equalization device, method and battery management system. Background technique [0002] When the battery cell group is in a charging state or a discharging state, due to the difference in capacity among the battery cells in the battery cell group, individual battery cells may be fully charged or exhausted first, resulting in the problem of shortening the service life of the battery cells. [0003] like figure 1 As shown, the equalization circuit includes n-1 energy storage capacitors and 2n switches connected in series in sequence. The main function of the balancing circuit is to transfer the energy of the battery cells with larger remaining power in the battery cell group to the energy storage capacitor of the balancing circuit for storage, and then transfer the energy stored in the energy storage capacitor to the remaining power in the batter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH01M10/441H02J7/0014H02J7/0019H02J7/0048Y02E60/10Y02T10/70
Inventor 季中
Owner HANGZHOU YUANSE TECH LTD
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