Energy storage battery acid liquor compensation liquid flow circulation system

Abstract

The utility model relates to an energy storage battery acid liquor compensation liquid flow circulation system which is characterized by comprising a battery pack consisting of a plurality of battery units, a liquid flow circulation assembly, a liquid injection pump and a liquid storage container, the system can quantitatively supplement the acid liquor into the battery unit, effectively supplement the battery acid liquor evaporated in the battery heating process in the operation process of the energy storage system, avoid sulfuric acid crystallization formed by liquid shortage in the battery, reduce liquid shortage aggravation caused by further heating of the battery, effectively prolong the service life of the energy storage battery unit, and improve the energy storage efficiency. The overall service life and efficiency of the energy storage system are further improved, and application and popularization value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage battery systems, in particular to an acid liquid compensation liquid flow circulation system for energy storage batteries. Background Art

[0002] At present, energy storage batteries need to be charged and discharged repeatedly during use. In this process, the battery liquid in the battery cell evaporates and is lost due to repeated heating and cooling. When cooling, the battery solution forms sulfuric acid crystals and precipitates and sticks to the lead plate, causing a significant increase in resistance. When charging, it generates more heat and further evaporates the liquid in the battery. When the acid loss reaches a certain level, the battery cell eventually fails. It can be seen that the loss of battery fluid is the main reason affecting the service life of energy storage batteries. Summary of the invention

[0003] The utility model proposes an energy storage battery acid compensation liquid flow circulation system, which effectively replenishes the battery liquid evaporated during the battery heating process, can effectively increase the service life of the energy storage battery unit, and further improve the overall service life and efficiency of the energy storage system.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An energy storage battery acid liquid compensation liquid flow circulation system, characterized in that it includes a battery pack consisting of a plurality of battery cells, a liquid flow circulation component, a liquid injection pump and a liquid storage container 4;

[0006] The liquid circulation assembly comprises a liquid circulation bottle, a liquid injection plug, a battery series pipe, a liquid injection pipe and a return pipe; the battery shell of the battery unit is a closed battery shell with at least one gas-liquid channel on the top;

[0007] The injection plug is detachably fixed to the gas-liquid channel of the battery shell of each battery unit, and the injection plug includes at least one liquid input end, one liquid output end and a gas one-way pressure relief valve. The liquid input end of the injection plug of the frontmost battery unit in the battery pack is connected to the rear end of the injection tube, and the liquid output end of the injection plug of the rearmost battery unit in the battery pack is connected to the front end of the reflux tube. The other battery units are connected in series with the liquid input end and the liquid output end of each injection plug on their battery shells through the battery series tube;

[0008] The front end of the liquid circulation bottle is connected to the injection pump through a conduit, and the injection pump is connected to the liquid storage container through a conduit; the rear end of the liquid circulation bottle is provided with a one-way injection port and a reflux port, the injection port is connected to the front end of the injection pipe, and the reflux port is connected to the rear end of the reflux pipe.

[0009] The principle of the utility model is as follows: before the battery unit is started, a certain amount of acid is injected into the liquid circulation bottle, and the acid in the circulation bottle fills the entire circulation pipeline system of the injection pipe, the battery series pipe and the reflux pipe in sequence. When acid loss occurs in the battery unit, the one-way pressure relief valve exhausts air, and a negative pressure is generated in the battery shell. At this time, the acid in the circulation pipeline system flows from the injection plug into the battery to complete the liquid replenishment, and the acid can be replenished into the liquid circulation bottle through the injection pump and then enters the entire circulation pipeline to meet the liquid replenishment needs of the entire battery pack.

[0010] The beneficial effects of the utility model are as follows: the system can quantitatively replenish acid into the battery cells, effectively replenish the battery acid evaporated during the battery heating process during the operation of the energy storage system, avoid sulfuric acid crystallization caused by lack of liquid in the battery, reduce the aggravation of lack of liquid caused by further heating of the battery, effectively improve the service life of the energy storage battery cells, further improve the overall service life and efficiency of the energy storage system, and has promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Example

[0013] As shown in the figure, an energy storage battery acid liquid compensation liquid flow circulation system includes a battery pack consisting of a plurality of battery cells 1, a liquid flow circulation component, a liquid injection pump 3 and a liquid storage container 4;

[0014] The liquid circulation assembly includes a liquid circulation bottle 21, a liquid injection plug 22, a battery series pipe 23, a liquid injection pipe 24 and a return pipe 25; the battery shell of the battery unit 1 is a closed battery shell with at least one gas-liquid channel on the top;

[0015] The injection plug 22 is detachably fixed to the gas-liquid channel of the battery shell of each battery cell 1, and the injection plug 22 includes at least one liquid input end 221, one liquid output end 222 and a gas one-way pressure relief valve 223. The liquid input end 221 of the injection plug 22 of the frontmost battery cell 1 in the battery pack is connected to the rear end of the injection tube 24, and the liquid output end 222 of the injection plug 22 of the rearmost battery cell 1 in the battery pack is connected to the front end of the reflux tube 25. The other battery cells are connected in series with the liquid input end 221 and the liquid output end 222 of each injection plug 22 on their battery shells through the battery series tube 23;

[0016] The front end of the liquid circulation bottle 21 is connected to the injection pump 3 through a conduit, and the injection pump 3 is connected to the liquid storage container 4 through a conduit; the rear end of the liquid circulation bottle 21 is provided with a one-way injection port 211 and a reflux port 212, the injection port 211 is connected to the front end of the injection pipe 24, and the reflux port 212 is connected to the rear end of the reflux pipe 25.

[0017] The principle of the utility model is as follows: before the battery unit 1 is started, a certain amount of acid is injected into the liquid circulation bottle 21, and the acid in the liquid circulation bottle 21 sequentially fills the entire circulation pipeline system including the injection pipe 24, the battery series pipe 23 and the return pipe 25. When acid loss occurs in the battery unit 1, the gas one-way pressure relief valve 223 exhausts gas and a negative pressure is generated in the battery shell. At this time, the acid in the circulation pipeline system flows from the injection plug 22 into the battery unit 1 to complete the liquid replenishment, and the acid can be replenished into the liquid circulation bottle 21 through the injection pump 3 and then enters the entire circulation pipeline to meet the liquid replenishment needs of the entire battery pack.

[0018] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An energy storage battery acid compensation liquid flow circulation system, characterized in that A battery pack including a plurality of battery cells, a liquid circulation component, a liquid injection pump and a liquid storage container; The liquid circulation assembly comprises a liquid circulation bottle, a liquid injection plug, a battery series pipe, a liquid injection pipe and a return pipe; the battery shell of the battery unit is a closed battery shell with at least one gas-liquid channel on the top; The injection plug is detachably fixed to the gas-liquid channel of the battery shell of each battery unit, and the injection plug includes at least one liquid input end, one liquid output end and a gas one-way pressure relief valve. The liquid input end of the injection plug of the frontmost battery unit in the battery pack is connected to the rear end of the injection tube, and the liquid output end of the injection plug of the rearmost battery unit in the battery pack is connected to the front end of the reflux tube. The other battery units are connected in series with the liquid input end and the liquid output end of each injection plug on their battery shells through the battery series tube; The front end of the liquid circulation bottle is connected to the injection pump through a conduit, and the injection pump is connected to the liquid storage container through a conduit; the rear end of the liquid circulation bottle is provided with a one-way injection port and a reflux port, the injection port is connected to the front end of the injection pipe, and the reflux port is connected to the rear end of the reflux pipe.

Images