CN218241983U

CN218241983U - Battery pack and battery energy storage system

Info

Publication number: CN218241983U
Application number: CN202222098745.9U
Authority: CN
Inventors: 张唯龙; 张士礼; 周英杰
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-01-06
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a battery package and battery energy storage system, the battery package includes the battery package casing and is located inside two-layer battery at least, every layer the battery has a plurality of battery monomers, and is a plurality of battery monomer arranges along X direction and Y direction and distributes, and is adjacent between the battery monomer and form the heat dissipation wind channel between the inner wall of battery monomer and battery package casing, the one end of battery package casing is equipped with and is corresponding to each layer the free radiator fan of battery, the other end of battery package casing be equipped with corresponding to the free cooling wind gap of battery. This battery package can realize radiating effect's maximize, and the cooperation in simplification and battery frame and whole energy storage system wind channel has avoided trompil on the battery frame simultaneously, has reached reduce cost, has reduced man-hour's purpose, has effectively improved the cold wind volume that gets into the battery package simultaneously.

Description

Battery pack and battery energy storage system

Technical Field

The utility model relates to a battery energy storage technical field especially relates to container formula battery energy storage system's battery package. The utility model discloses still relate to and be equipped with the battery energy storage system of battery package.

Background

The container type battery energy storage system integrates the lithium ion battery, the battery management system, the alternating current-direct current conversion device, the heat management system, the fire fighting system and the like in a standard container, has the advantages of high integration level, small occupied area, large storage capacity, convenience in transportation, easiness in installation and the like, and is one of the most widely applied energy storage technologies at present.

The arrangement of the batteries of the container type energy storage system is tight, the environment of the container is relatively closed, and the heat of the batteries is easy to gather to cause overhigh temperature rise, thereby influencing the service life and the service performance of the batteries. In order to solve the problem of overhigh temperature rise of the battery of the container type energy storage system, common heat dissipation modes comprise natural heat dissipation, forced air cooling, liquid cooling and phase change direct cooling, wherein the natural heat dissipation efficiency is low, the space in the container is narrow, the air circulation is inconvenient, and the temperature control requirement is difficult to achieve; the technical requirements and the cost of liquid cooling and phase change direct cooling are high, and the liquid cooling and phase change direct cooling system is not suitable for being used in a container type battery energy storage system; the forced air cooling heat dissipation mode adopts industrial air conditioner and fan to refrigerate, can satisfy the heat dissipation requirement of energy storage system, and the cost is in acceptable range, is the most suitable heat dissipation mode of container formula battery energy storage system at present.

As shown in fig. 1 and 2, in the current side-opening battery energy storage system, an air duct is formed between two rows of battery racks 2 and a top sealing plate, cold air of the air conditioning system 1 enters the side face of the battery pack 3 through an air inlet 21 of the battery racks 2, and a fan on the front face of the battery pack 3 draws air to complete heat dissipation of the battery pack 3.

This heat dissipation structure has the following disadvantages:

firstly, because the air duct needs to be switched through two stages of air ducts, especially enters the battery pack 3 through the air inlet 21 of the battery rack 2, the loss amount of cold air is large in the switching process, and the required air conditioner power is large.

Secondly, the battery pack 3 adopts a side air inlet mode, if a gap is formed between the battery pack 3 and the battery rack 2, the distance between the air inlet 21 on the side surface and the air outlet on the front surface is too close, and the hot air backflow phenomenon is easily generated.

Moreover, the cooperation that 3 side air intakes of battery package and container wind channel is relatively poor, leads to current battery rack 2 to need the from the top down exhaust hole to handle, and this kind of processing mode has increased the cost, has prolonged the time limit for a project, and the width of 2 stands of battery rack is limited simultaneously, has reduced the income volume of cold wind to a certain extent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can effectively promote battery package of electric core radiating effect.

Another object of the present invention is to provide a battery energy storage system with the battery pack.

In order to realize the above object, the utility model provides a battery pack, include the battery pack casing and be located the inside at least two-layer battery of battery pack casing, every layer the battery has a plurality of battery monomer, and is a plurality of battery monomer arranges along X direction and Y direction and distributes, and is adjacent between the battery monomer and form the heat dissipation wind channel between the inner wall of battery monomer and battery pack casing, the one end of battery pack casing is equipped with and is corresponding to each layer the free cooling fan of battery, the other end of battery pack casing be equipped with corresponding to the free cooling wind gap of battery.

Optionally, each layer of the battery cells is provided with at least two cooling fans, and each cooling fan corresponds to 2 to 4 battery cells.

Optionally, the heat dissipation air port includes a plurality of vent holes arranged and distributed along the X direction and the Z direction.

Optionally, each of the vent holes is a vertical oblong hole.

In order to achieve the other purpose, the invention provides a battery energy storage system, which comprises a box body, an air conditioning system and a battery rack, wherein the air conditioning system and the battery rack are arranged in the box body, a battery pack is arranged on the battery rack, the air conditioning system is used for cooling the battery pack through an air supply duct and an air return duct, and the battery pack is any one of the battery packs.

Optionally, an air supply duct is formed in the box body at the central position, the battery rack comprises a first battery rack and a second battery rack which are positioned at two sides of the air supply duct, a first return air duct is arranged outside the first battery rack, and a second return air duct is arranged outside the second battery rack; the heat dissipation air inlets of the battery packs on the first battery frame and the second battery frame are respectively positioned at two sides of the air supply duct, the heat dissipation fan of the battery pack on the first battery frame is positioned at one side of the first air return duct, and the heat dissipation fan of the battery pack on the second battery frame is positioned at one side of the second air return duct.

Optionally, the air conditioning system includes a first air conditioning system and a second air conditioning system, the air supply duct is divided into a first air supply duct and a second air supply duct by a duct partition plate, an air supply outlet of the first air conditioning system corresponds to the first air supply duct, and an air supply outlet of the second air conditioning system corresponds to the second air supply duct; the first return air duct corresponds to a return air inlet of the first air conditioning system, and the second return air duct corresponds to a return air inlet of the second air conditioning system.

Optionally, a return air duct is formed in the box body at the central position, the battery rack comprises a first battery rack and a second battery rack which are positioned at two sides of the return air duct, a first air supply duct is arranged at the outer side of the first battery rack, and a second air supply duct is arranged at the outer side of the second battery rack; the heat dissipation fans of the battery packs on the first battery rack and the second battery rack are respectively positioned on two sides of the return air duct, the heat dissipation air port of the battery pack on the first battery rack is positioned on one side of the first air supply duct, and the heat dissipation air port of the battery pack on the second battery rack is positioned on one side of the second air supply duct.

Optionally, the air conditioning system includes a first air conditioning system and a second air conditioning system, the return air duct is divided into a first return air duct and a second return air duct by an air duct partition plate, a return air inlet of the first air conditioning system corresponds to the first return air duct, and a return air inlet of the second air conditioning system corresponds to the second return air duct; and the air supply outlet of the first air-conditioning system corresponds to the first air supply air channel, and the air supply outlet of the second air-conditioning system corresponds to the second air supply air channel.

Optionally, an air duct top plate is arranged at the top of the air supply air duct and/or the air return air duct, and an air duct sealing plate is arranged at the end of the air supply air duct and/or the air return air duct.

The utility model provides a battery pack, utilize the clearance between the battery monomer and between battery monomer and the battery pack casing to form the heat dissipation wind channel, and be equipped with radiator fan in the one end of battery pack casing, the other end is equipped with the heat dissipation wind gap, make the cold wind that gets into the battery pack directly flow through battery monomer, radiating maximize effect has been realized, the cooperation in its and battery frame and whole energy storage system wind channel has simplified simultaneously, trompil on the battery frame has been avoided, the cost is reduced has been reached, man-hour's purpose is reduced, the cold wind volume that gets into the battery pack has effectively been improved simultaneously.

The utility model provides a battery energy storage system makes the air intake of battery package directly be located the one-level wind channel, and cold wind gets into the battery package back simultaneously, and the direct battery monomer that generates heat of flowing through not only the wind channel is short, and the convulsions direction is unanimous with the wind flow direction of saying moreover, has effectively improved the cold wind utilization ratio of battery package, has reduced the power of air conditioner, and in addition, has reduced the complexity of wind channel design, has avoided the hot-blast backward flow phenomenon that battery package side air inlet leads to near the air outlet too simultaneously.

Drawings

FIG. 1 is a schematic view of a container air duct structure of a side-door battery energy storage system;

FIG. 2 is an isometric view of the battery stand shown in FIG. 1;

fig. 3 is an isometric view of a battery pack according to an embodiment of the present invention;

FIG. 4 is an isometric view of the battery pack of FIG. 3 from another perspective;

FIG. 5 is a schematic front view of one end of the battery pack of FIG. 3;

fig. 6 is a cross-sectional view of the battery pack shown in fig. 3;

FIG. 7 is a schematic front view of the other end of the battery pack of FIG. 3;

fig. 8 is a top view of the battery pack of fig. 3;

fig. 9 is an isometric view of a battery energy storage system according to an embodiment of the present invention;

fig. 10 is a schematic diagram of the air duct of the battery energy storage system shown in fig. 9;

fig. 11 isbase:Sub>A viewbase:Sub>A-base:Sub>A of the battery energy storage system of fig. 10;

FIG. 12 is a B-B view of the battery energy storage system of FIG. 10;

fig. 13 is a schematic view of an air duct of another battery energy storage system according to an embodiment of the present invention.

In the figure:

1. air conditioning system 2, battery rack 21, air inlet 3, battery pack

100. Battery pack 110, battery pack case 111, bottom plate 112, partition plate 113, vent hole 120, battery cell 130 and heat dissipation fan

210. The air conditioner comprises a box body 220, an air conditioning system 221, a first air conditioning system 222, a second air conditioning system 230, a battery rack 231, a first battery rack 232, a second battery rack 240, an air duct top plate 250, an air duct cover plate 260, a power distribution cabinet 270, a supply air duct 271, a first supply air duct 272, a second supply air duct 280, a return air duct 281, a first return air duct 282, a second return air duct 290 and a duct partition plate.

Detailed Description

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

In this specification, terms such as "upper, lower, inner, and outer" are established based on positional relationships shown in the drawings, and the corresponding positional relationships may vary depending on the drawings, and therefore, the terms are not to be construed as absolutely limiting the scope of protection; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, and do not necessarily require or imply any actual relationship or order between such elements.

Referring to fig. 3 to 8, fig. 3 is an axial view of a battery pack according to an embodiment of the present invention; FIG. 4 is an isometric view of the battery pack of FIG. 3 from another perspective; FIG. 5 is a schematic front view of one end of the battery pack of FIG. 3; fig. 6 is a cross-sectional view of the battery pack shown in fig. 3; FIG. 7 is a schematic front view of the other end of the battery pack of FIG. 3; FIG. 8 is a top view of the battery pack of FIG. 3

In a specific embodiment, the utility model provides a battery pack 100 mainly comprises battery pack casing 110 and the two-layer battery that is located battery pack casing 110 inside, battery pack casing 110 is the rectangle generally, bottom plate 111 that has the first layer battery and the division board 112 that bears the second floor battery, each layer battery has eight battery monomer 120, eight battery monomer 120 is along X direction and Y direction range distribution, quantity in the X direction is four, quantity in the Y direction is two, the arrangement of two-layer battery is the same, totally sixteen battery monomer 120, in each layer battery, form the heat dissipation wind channel between adjacent battery monomer 120 and between the inner wall of battery monomer 120 and battery pack casing 110, the direction and the Y direction in heat dissipation wind channel are unanimous.

One end of the battery pack housing 110 is provided with four cooling fans 130, two of the cooling fans 130 correspond to the eight battery cells 120 of the first layer of battery, the other two cooling fans 130 correspond to the eight battery cells 120 of the second layer of battery, and each cooling fan 130 corresponds to four battery cells 120.

The other end of the battery pack shell 110 is provided with a heat dissipation air port, in this embodiment, the heat dissipation air port is a plurality of ventilation holes 113, each ventilation hole 113 is a vertical long round hole, the plurality of ventilation holes 113 are arranged and distributed along the X direction and the Z direction, and the distribution area of the ventilation holes 113 covers the battery monomer 120 of each layer of batteries, so as to communicate the heat dissipation air duct inside the battery pack with the air duct.

Here, the exhaust direction of the heat dissipation fan 130 may be toward the inside of the battery pack 100 or toward the outside of the battery pack 100. If the air exhausting direction of the heat-dissipating fan 130 is toward the inside of the battery pack 100, the heat-dissipating air port is an air outlet, and if the air exhausting direction of the heat-dissipating fan 130 is toward the outside of the battery pack 100, the heat-dissipating air port is an air inlet.

This battery package 100 is changed into the structural style of front and back air inlet by original side air inlet, it can lead to the inside temperature inequality of battery structure to have considered the wind channel overlength simultaneously, consequently, divide into battery monomer 120 about two-layer, through four radiator fan 130, every radiator fan 130 corresponds four battery monomer 120, the start-stop of average temperature control radiator fan 130 through the feedback of battery monomer 120, after cold wind gets into battery package 100, battery monomer 120 directly flows through, discharge after carrying out the cold and hot exchange with battery monomer 120, accomplish the cooling to battery monomer 120, its radiating duct is shorter, and radiating duct accords with the flow direction of cold wind, the effectual free radiating effect of battery that has promoted, the maximize of radiating effect has been realized.

Moreover, the battery pack 100 can be easily matched with a heat dissipation air duct, and a series of problems of cost increase, construction period extension, air volume loss and the like caused by holes formed in the battery rack are avoided.

The heat dissipation fan 130 of the battery pack 100 may be controlled by a battery management system, and the heat dissipation fan 130 of each battery pack 100 may be independently controlled to operate. When the battery management system detects that the temperature of a certain battery pack 100 is higher than a set value T, the cooling fan 130 of the battery pack 100 is started, and the operation is stopped when the temperature return difference is smaller than delta T. The temperature control strategy can start different thermal management control modes based on different working conditions, greatly improves the temperature control capability of the thermal management system, and effectively reduces the energy consumption of the energy storage system on the premise of realizing thermal management performance indexes.

Referring to fig. 9 to 12, fig. 9 is an axial view of a battery energy storage system according to an embodiment of the present invention; FIG. 10 is a schematic view of a duct of the battery energy storage system of FIG. 9; fig. 11 isbase:Sub>A viewbase:Sub>A-base:Sub>A of the battery energy storage system of fig. 10; fig. 12 is a B-B view of the battery energy storage system shown in fig. 10.

In a specific embodiment, the utility model provides a battery energy storage system is container formula battery energy storage system, and it mainly comprises box 210, air conditioning system 220, battery frame 230, wind channel roof 240, wind channel shrouding 250 and switch board 260 etc. wherein, wind channel roof 240 and wind channel shrouding 250 constitute air conditioning system's air supply wind channel, are equipped with above-mentioned battery package 100 on the battery frame 230, and air conditioning system 220 cools down battery package 100 on to the battery frame 230 through air supply wind channel and return air duct.

Specifically, an air supply duct 270 is formed in the central position inside the box 210, the battery rack 230 is divided into a first battery rack 231 and a second battery rack 232 which are located at two sides of the air supply duct 270, a first return air duct 281 is located outside the first battery rack 231, and a second return air duct 282 is located outside the second battery rack 232; the vent holes 113 of the battery packs 100 on the first battery rack 231 and the second battery rack 232 are respectively located at two sides of the air supply duct 270, the heat dissipation fan 130 of the battery pack 100 on the first battery rack 231 is located at one side of the first air return duct 281, and the heat dissipation fan 130 of the battery pack 100 on the second battery rack 232 is located at one side of the second air return duct 282.

In order to make the flow paths on the left and right sides relatively independent, the air conditioning system 220 of this embodiment is composed of a first air conditioning system 221 and a second air conditioning system 222, and an air duct partition 290 is disposed in the air supply duct 270, the air supply duct 270 is divided into a first air supply duct 271 and a second air supply duct 272 by the air duct partition 290, the air supply outlet of the first air conditioning system 221 corresponds to the first air supply duct 271, the air supply outlet of the second air conditioning system 222 corresponds to the second air supply duct 272, the first return air duct 281 corresponds to the return air inlet of the first air conditioning system 221, the second return air duct 282 corresponds to the return air inlet of the second air conditioning system 222, so as to form a cooling flow path of middle intake air and two-side return air, the air duct partition 290 separates the first air conditioning system 221 from the second air conditioning system 222, and equally distributes the cold air of the two air conditioning systems, so that the air volumes on both sides are more average.

When the battery energy storage system is operated, the temperature of each set point in the container is monitored in real time through the temperature probe, when the temperature of the set point is higher than the set starting temperature of the air conditioning system, the first air conditioning system 221 and/or the second air conditioning system 222 operate the refrigeration function, the interior of the container is cooled through the air duct, and when the temperature reaches the set value, the first air conditioning system 221 and/or the second air conditioning system 222 stop working. When the temperature of the set point is lower than the set starting temperature of the air conditioning system, the air conditioner runs the heating function and heats the interior of the container through the air duct, and when the temperature reaches the set value, the air conditioner stops working.

Referring to fig. 13, fig. 13 is a schematic view of an air duct of another battery energy storage system according to an embodiment of the present invention.

In another embodiment, a return air duct 280 is formed in the center of the box 210, the battery rack 230 is divided into a first battery rack 231 and a second battery rack 232 which are located at two sides of the return air duct 280, a first supply air duct 271 is arranged outside the first battery rack 231, and a second supply air duct 272 is arranged outside the second battery rack 232; the heat dissipation fans 130 of the battery packs 100 on the first battery rack 231 and the second battery rack 232 are respectively located at two sides of the air return duct 280, the vent holes 113 of the battery packs 100 on the first battery rack 231 are located at one side of the first air supply duct 271, and the vent holes 113 of the battery packs 100 on the second battery rack 232 are located at one side of the second air supply duct 272.

Specifically, the air conditioning system 220 is composed of a first air conditioning system 221 and a second air conditioning system 222, the return air duct 280 is divided into a first return air duct 281 and a second return air duct 282 by a duct partition 290, a return air inlet of the first air conditioning system 221 corresponds to the first return air duct 281, and a return air inlet of the second air conditioning system 222 corresponds to the second return air duct 282; the air supply outlet of the first air conditioning system 221 corresponds to the first air supply air channel 271, and the air supply outlet of the second air conditioning system 222 corresponds to the second air supply air channel 272, so that a cooling flow path for returning air in the middle and supplying air at two sides is formed, and hot air in the left and right battery packs can be prevented from being blown to each other through the air channel partition 290, so that the temperature of the battery packs is influenced.

This embodiment is equivalent to that on the basis of the first embodiment, the battery rack is installed reversely, and meanwhile, the air duct top plate 240 and the air duct sealing plate 250 form the air supply duct of the container, and an air duct sealing plate 250 needs to be added, that is, the structure that the air duct sealing plate 250 is used in the first embodiment and both sides are open is changed into the structure that the air duct sealing plate 250 is used in both sides and the middle is open.

Parts of the embodiment which are the same as those of the first battery energy storage system are given the same reference numerals, and the same description is omitted.

The above embodiments are merely preferred embodiments of the present invention, and are not limited thereto, and different embodiments can be obtained by performing targeted adjustment according to actual needs. For example, the number of battery cells 120 in the battery pack 100 is further increased or decreased, or the number of heat dissipation fans 130 on each battery pack 100 is adjusted, and so on. This is not illustrated here because of the many possible implementations.

The improved battery energy storage system can enable the air inlet of the battery pack 100 to be directly located in the primary air channel without switching through two or three air channels, so that the loss of cold air is effectively reduced, the cold air is efficiently utilized, the power of air conditioner model selection is effectively reduced, the complexity of air channel design is reduced, and the hot air backflow phenomenon caused by the fact that the air inlet of the side face of the battery pack is too close to the air outlet is avoided.

It is right above the utility model provides a battery package and battery energy storage system have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a battery pack, its characterized in that includes battery pack shell and is located inside at least two-layer battery of battery pack shell, every layer the battery has a plurality of battery monomer, and is a plurality of battery monomer arranges along X direction and Y direction and distributes, and is adjacent between the battery monomer and form the heat dissipation wind channel between the inner wall of battery monomer and battery pack shell, the one end of battery pack shell is equipped with and is corresponding to each layer the free radiator fan of battery, the other end of battery pack shell be equipped with corresponding to the free cooling wind gap of battery.

2. The battery pack according to claim 1, wherein at least two heat dissipation fans are provided for each layer of the battery cells, and each heat dissipation fan corresponds to 2-4 battery cells.

3. The battery pack of claim 2, wherein the heat dissipation vent comprises a plurality of vent holes arranged in an X-direction and a Z-direction.

4. The battery pack of claim 3, wherein each of the vent holes is a vertically elongated hole.

5. A battery energy storage system comprises a box body, an air conditioning system and a battery rack, wherein the air conditioning system and the battery rack are arranged in the box body, a battery pack is arranged on the battery rack, the air conditioning system is used for cooling the battery pack through an air supply duct and an air return duct, and the battery pack is characterized in that the battery pack is the battery pack in any one of claims 1 to 4.

6. The battery energy storage system of claim 5, wherein a supply air duct is formed in the central position inside the box body, the battery rack comprises a first battery rack and a second battery rack which are positioned at two sides of the supply air duct, a first return air duct is arranged outside the first battery rack, and a second return air duct is arranged outside the second battery rack; the heat dissipation air inlets of the battery packs on the first battery rack and the second battery rack are respectively positioned on two sides of the air supply duct, the heat dissipation fan of the battery pack on the first battery rack is positioned on one side of the first air return duct, and the heat dissipation fan of the battery pack on the second battery rack is positioned on one side of the second air return duct.

7. The battery energy storage system of claim 6, wherein the air conditioning system comprises a first air conditioning system and a second air conditioning system, the air supply duct is divided into a first air supply duct and a second air supply duct by a duct partition plate, an air supply outlet of the first air conditioning system corresponds to the first air supply duct, and an air supply outlet of the second air conditioning system corresponds to the second air supply duct; the first air return duct corresponds to an air return opening of the first air conditioning system, and the second air return duct corresponds to an air return opening of the second air conditioning system.

8. The battery energy storage system of claim 5, wherein a return air duct is formed in the box at a central position, the battery racks comprise a first battery rack and a second battery rack which are positioned at two sides of the return air duct, a first supply air duct is arranged at the outer side of the first battery rack, and a second supply air duct is arranged at the outer side of the second battery rack; the heat dissipation fans of the battery packs on the first battery rack and the second battery rack are respectively positioned on two sides of the return air duct, the heat dissipation air port of the battery pack on the first battery rack is positioned on one side of the first air supply duct, and the heat dissipation air port of the battery pack on the second battery rack is positioned on one side of the second air supply duct.

9. The battery energy storage system of claim 8, wherein the air conditioning system comprises a first air conditioning system and a second air conditioning system, the return air duct is divided into a first return air duct and a second return air duct by a duct partition, the return air inlet of the first air conditioning system corresponds to the first return air duct, and the return air inlet of the second air conditioning system corresponds to the second return air duct; and the air supply outlet of the first air-conditioning system corresponds to the first air supply air channel, and the air supply outlet of the second air-conditioning system corresponds to the second air supply air channel.

10. The battery energy storage system of claim 5, wherein the top of the supply air duct and/or the return air duct is provided with an air duct top plate, and the end of the supply air duct and/or the return air duct is provided with an air duct sealing plate.