CN211456744U - Echelon battery parallel energy storage device - Google Patents
Echelon battery parallel energy storage device Download PDFInfo
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- CN211456744U CN211456744U CN202020198404.7U CN202020198404U CN211456744U CN 211456744 U CN211456744 U CN 211456744U CN 202020198404 U CN202020198404 U CN 202020198404U CN 211456744 U CN211456744 U CN 211456744U
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Abstract
The utility model discloses a device for storing energy of echelon batteries in parallel, which comprises a PCS and at least two groups of echelon battery energy storage modules; the echelon battery energy storage module is characterized by comprising a battery cluster joint and a DC/DC module, wherein the battery cluster joint is electrically connected with the input end of the DC/DC module, the output end of the DC/DC module is the output end of the echelon battery energy storage module, and the output ends of the echelon battery energy storage modules are electrically connected with the input end of the PCS module after being connected in parallel; the output end of the PCS module is electrically connected with a power grid; the battery cluster joint is used for connecting the echelon battery clusters; the PCS module is used for converting direct current of the battery cluster into alternating current; the DC/DC module is used for increasing the voltage of the battery cluster to a preset standard voltage value. Therefore, the utility model discloses a device of echelon battery parallel connection energy storage has realized utilizing the function that polylith echelon battery stored more electric energy, has avoided the direct parallelly connected inside circulation problem that leads to of echelon battery of the different characteristic again.
Description
Technical Field
The utility model relates to a power battery retrieves the field, especially relates to a device of parallelly connected energy storage of echelon battery.
Background
The new energy automobile develops very rapidly, and it is expected that in the coming years, a large number of power batteries of the new energy automobile will be eliminated inevitably, and the recycling of the eliminated power batteries is always a hot topic discussed in the industry, which determines whether the new energy automobile can be developed continuously and well.
At present, the method for utilizing the eliminated power batteries (also called as echelon batteries in the industry) in the industry is mainly to disassemble the power batteries, detect the health conditions of the single internal battery cores one by one and recombine and utilize the power batteries.
Therefore, the company provides a scheme of adding the DC/DC module between the battery cluster joint and the PCS module, so that the problems of low echelon battery recovery efficiency and high recovery difficulty are greatly reduced.
However, in practical use, the instantaneous power consumption in some occasions is higher, a single echelon battery cannot meet the requirements, and as the echelon batteries are all integrally recycled, the output current capability of a single echelon battery is difficult to increase, in order to increase the instantaneous output current capability, a plurality of echelon batteries are firstly considered to be connected in parallel for use, however, due to the difference among the echelon batteries, when the echelon batteries are used in parallel, the echelon battery with higher voltage can self-charge the echelon battery with lower voltage, and in practical use, the self-charging cannot reach the real balance, but the self-charging is repeated among the parallel echelon batteries, namely, a circulating internal circulation is formed, so that the self-loss of electric energy is caused, and the health of the battery is greatly damaged by the internal circulation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a device for storing energy by cascading batteries in parallel.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
a device for storing energy of echelon batteries in parallel comprises a PCS module and at least two echelon battery energy storage modules; the echelon battery energy storage module is characterized by comprising a battery cluster joint and a DC/DC module, wherein the battery cluster joint is electrically connected with the input end of the DC/DC module, the output end of the DC/DC module is the output end of the echelon battery energy storage module, and the output ends of the echelon battery energy storage modules are electrically connected with the input end of the PCS module after being connected in parallel; the output end of the PCS module is electrically connected with a power grid;
the battery cluster joint is used for connecting a recycled power battery, namely a echelon battery cluster;
the PCS module is used for converting direct current of the battery cluster into alternating current;
the DC/DC module is used for increasing the voltage of the battery cluster to a preset standard voltage value;
compared with the prior art, the utility model discloses following technological effect has:
the voltage values of the battery clusters with different voltages are raised to a uniform standard value through the DC/DC module and then are connected in parallel, so that the condition that the battery clusters with different voltages are directly connected in parallel to generate circulation is avoided, the parallel use of multiple paths of battery clusters is realized through the device, and the instantaneous discharge capacity of the energy storage system is greatly improved.
On the basis of the technical scheme, the utility model discloses can also do as follows the change:
the echelon battery energy storage modules further comprise battery switching modules, each echelon battery energy storage module comprises a plurality of groups of battery cluster joints, and the battery switching modules are arranged between the battery cluster joints and the DC/DC modules and used for controlling the electrical connection between the battery clusters and the DC/DC modules; and only one group of battery clusters is electrically connected with the DC/DC module at any time.
The beneficial effect who adopts above-mentioned further measure is that, when the system detects the battery of current work and crowd the electric quantity not enough, through battery switching module automatic switch to another battery cluster, so, only have a battery cluster to be connected with DC/DC module at any moment and outwards provide the electric energy, but generally speaking has realized utilizing the function that the polylith echelon battery stored more electric energy again, under the condition that the current satisfies the demand in the twinkling of an eye in the totality, only use one set of DC/DC module can realize the recycle of a plurality of echelon batteries, reduce the recovery cost.
Drawings
Fig. 1 is a schematic structural diagram of the device for storing energy by connecting gradient batteries in parallel according to the present invention;
FIG. 2 is a schematic structural view of example 2;
in the drawings, the parts names represented by the respective reference numerals are listed as follows:
1. a battery cluster joint; 1-1, a battery cluster; 2. a battery switching module; 3. a DC/DC module; 4. and a PCS module.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
The first embodiment is as follows:
fig. 1 is a schematic structural view of a device for storing energy in parallel with echelon batteries according to the present invention. The echelon battery parallel energy storage device comprises a PCS module and at least two echelon battery energy storage modules; the echelon battery energy storage module comprises a battery cluster joint and a DC/DC module, the battery cluster joint is electrically connected with the input end of the DC/DC module, the output end of the DC/DC module is the output end of the echelon battery energy storage module, and the output ends of the echelon battery energy storage modules are electrically connected with the input end of the PCS module after being connected in parallel; the output end of the PCS module is electrically connected with a power grid;
the battery cluster joint is used for electrically connecting the echelon battery clusters;
the PCS module is used for converting direct current of the battery cluster into alternating current;
the DC/DC module is used for increasing the voltage of the battery cluster to a preset standard voltage value.
Example two:
as shown in fig. 2, on the basis of the first embodiment, each echelon battery energy storage module further includes a battery switching module, each echelon battery energy storage module includes a plurality of battery cluster joints, and the battery switching module is disposed between the battery cluster joints and the DC/DC module and is configured to control electrical connection between the battery clusters and the DC/DC module; and only one group of battery clusters is electrically connected with the DC/DC module at any time.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (2)
1. A device for storing energy of echelon batteries in parallel comprises a PCS module and at least two echelon battery energy storage modules; the echelon battery energy storage module is characterized by comprising a battery cluster joint and a DC/DC module, wherein the battery cluster joint is electrically connected with the input end of the DC/DC module, the output end of the DC/DC module is the output end of the echelon battery energy storage module, and the output ends of the echelon battery energy storage modules are electrically connected with the input end of the PCS module after being connected in parallel; the output end of the PCS module is electrically connected with a power grid;
the battery cluster joint is used for connecting the echelon battery clusters;
the PCS module is used for converting direct current of the battery cluster into alternating current;
the DC/DC module is used for increasing the voltage of the battery cluster to a preset standard voltage value.
2. The device for performing echelon battery parallel energy storage according to claim 1, wherein the echelon battery energy storage modules further comprise battery switching modules, each echelon battery energy storage module comprises a plurality of groups of battery cluster joints, and the battery switching modules are arranged between the battery cluster joints and the DC/DC modules and used for controlling the electrical connection between the battery clusters and the DC/DC modules; and only one group of battery clusters is electrically connected with the DC/DC module at any time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020198404.7U CN211456744U (en) | 2020-02-24 | 2020-02-24 | Echelon battery parallel energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020198404.7U CN211456744U (en) | 2020-02-24 | 2020-02-24 | Echelon battery parallel energy storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211456744U true CN211456744U (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202020198404.7U Active CN211456744U (en) | 2020-02-24 | 2020-02-24 | Echelon battery parallel energy storage device |
Country Status (1)
| Country | Link |
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| CN (1) | CN211456744U (en) |
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2020
- 2020-02-24 CN CN202020198404.7U patent/CN211456744U/en active Active
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