Title of Invention: Battery charge/discharge system including a cooling unit capable of uniform distribution of flow rate
technology field
[One]
The present invention relates to a battery charging/discharging system including a cooling unit capable of uniformly distributing a flow rate. This application claims the benefit of priority based on Korean Patent Application No. 10-2020-0129940 dated October 8, 2020, and all contents disclosed in the literature of the Korean patent application are included as part of this specification.
[2]
background art
[3]
Recently, as technology development and demand for mobile devices increase, demand for secondary batteries as an energy source is rapidly increasing.
[4]
Depending on the type of external device, the secondary battery may be used in the form of a single battery cell or a battery module in which a plurality of unit cells are electrically connected. For example, a small device such as a mobile phone can operate for a predetermined time with the output and capacity of one battery cell, whereas a medium or large device such as a notebook computer, portable DVD, small PC, electric vehicle, hybrid electric vehicle, etc. And the use of a battery module including a plurality of battery cells is required due to the problem of capacity.
[5]
Meanwhile, a secondary battery is manufactured through a process of assembling a battery cell and a process of activating the battery. At this time, the battery activation process is usually performed by applying a necessary current to a battery cell to be charged and discharged by a charge/discharge device having positive and negative contact pins.
[6]
1 is a view showing a conventional secondary battery charging/discharging system. As shown in FIG. 1, the conventional system 10 for charging and discharging a secondary battery includes a tray 11 in which a plurality of battery cells 1 are accommodated, and protrusions from the battery cells 1 accommodated in the tray 11. A charging and discharging unit 12 having a structure capable of electrical contact with the positive and negative electrodes and a cooling unit provided to dissipate heat generated from the battery cell 1 in the process of repeatedly charging and discharging and activating the battery cell 1 ( 13).
[7]
2 is a diagram schematically showing a cooling unit in a conventional secondary battery charging/discharging system. As shown in FIG. 2, the cooling unit 13 of the conventional secondary battery charging/discharging system 10 includes a plurality of blowing fans 13' toward the tray 11 in which the plurality of battery cells 1 are accommodated. It is composed by However, since the conventional cooling unit 13 is used to dissipate the entire heat of the battery cells 1 accommodated in the tray 11, a temperature deviation occurs depending on the location where the battery cells 1 are stored. It can be.
[8]
In this way, when there is a temperature deviation in the plurality of battery cells 1 during the charging and discharging process of the battery cell 1, the capacity deviation of the battery cell 1 may occur. Therefore, when it is necessary to determine whether or not the battery cell 1 is defective based on the measured value of the capacity of the battery cell 1 during the charging and discharging process, a problem in which the ability to distinguish whether the battery cell 1 is defective may occur.
[9]
Therefore, it is necessary to develop a technology for a battery charging and discharging system including a cooling unit capable of uniformly distributing a flow rate so as to charge and discharge battery cells and simultaneously cool heat generated from the battery cells.
[10]
[11]
[Prior art literature]
[12]
[Patent Literature]
[13]
Republic of Korea Patent Publication No. 10-2015-0034945
[14]
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[15]
The present invention is to solve the above problems, and to provide a battery charging and discharging system including a cooling unit capable of uniformly distributing the flow rate.
[16]
means of solving the problem
[17]
The present invention provides a battery charging/discharging system. In one example, a battery charging/discharging system according to the present invention includes a tray accommodating a plurality of battery cells; a charge/discharge unit electrically connected to first and second electrode leads formed in the plurality of battery cells housed in the tray; and a cooling unit for cooling the plurality of battery cells housed in the tray. At this time, the cooling unit is characterized in that it includes an air supply unit located above the tray and n perforated plates (n is an integer of 2 or more) located on the air flow passage by the air supply unit and forming a laminated structure.
[18]
In one example, the perforated plate has a structure in which a plurality of holes are formed, and the holes are formed in a central region of the perforated plate.
[19]
In another example, the perforated plate has a structure in which a plurality of holes are formed, and the diameter of the hole formed in the central region of the perforated plate is larger than the diameter of the hole formed in the edge region of the perforated plate.
[20]
In another example, the plurality of parallel slits are formed, and the slits are formed in a central region of the perforated plate.
[21]
In another example, the perforated plate has a structure in which a plurality of parallel slits are formed, and the width of the slits formed in the central region of the perforated plate is greater than the width of the slits formed in the edge region of the perforated plate.
[22]
In one example, the cooling unit includes a structure in which 2 to 5 perforated plates are stacked.
[23]
In a specific example, the cooling unit includes a plurality of air supply units, and the air supply units are equally divided and disposed on the top of the tray. Meanwhile, the air supply unit may be a blowing fan.
[24]
In one example, the plurality of battery cells accommodated in the tray has a vertically arranged structure, and the cooling unit blows air of a downward airflow through a blowing fan located on an upper portion of the tray. At this time, the plurality of battery cells accommodated in the tray may be pouch-type battery cells.
[25]
In another example, the tray has an open side structure, and the cooling unit further includes a sub-air supply unit for blowing cooling air toward battery cells from a side surface of the tray.
[26]
In one example, the battery charge/discharge system according to the present invention further includes a temperature sensor for measuring the temperature of the battery cells housed in the tray.
[27]
Effects of the Invention
[28]
According to the battery charge/discharge system including a cooling unit capable of uniformly distributing the flow rate of the present invention, temperature deviation between a plurality of battery cells can be minimized.
[29]
Brief description of the drawing
[30]
1 is a view showing a conventional secondary battery charging/discharging system.
[31]
2 is a diagram schematically showing a cooling unit in a conventional secondary battery charging/discharging system.
[32]
3 is a schematic diagram of a battery charging/discharging system according to an embodiment of the present invention.
[33]
4 is a diagram schematically showing a cooling unit of a battery charging/discharging system according to an embodiment of the present invention.
[34]
FIG. 5 is a graph showing temperature measurements of battery cells stored in a tray according to positions when a battery charge/discharge system including a cooling unit according to the first embodiment of the present invention and a conventional charge/discharge system are used.
[35]
6 is a view schematically showing a perforated plate of a cooling unit in another embodiment of the battery charging/discharging system according to the present invention.
[36]
7 is a diagram schematically showing a perforated plate of a cooling unit in a battery charging/discharging system according to another embodiment of the present invention.
[37]
8 is a diagram schematically illustrating a perforated plate of a cooling unit in a battery charging/discharging system according to another embodiment of the present invention.
[38]
9 is a schematic diagram of a battery charging/discharging system according to another embodiment of the present invention.
[39]
Best mode for carrying out the invention
[40]
Hereinafter, the present invention will be described in detail. Prior to this, terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately uses the concept of terms in order to describe his/her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical spirit of the present invention based on the principle that it can be defined in the following way.
[41]
[42]
In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof. In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where another part is present in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is said to be "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part in between. In addition, in the present application, being disposed "on" may include the case of being disposed not only on the top but also on the bottom.
[43]
[44]
The present invention relates to a battery charging/discharging system including a cooling unit capable of uniformly distributing a flow rate.
[45]
In a conventional battery charge/discharge system, a cooling unit is used to dissipate heat from battery cells housed in a tray. Thus, a plurality of battery cells accommodated in the tray had a temperature deviation depending on the storage position. In this case, the capacity deviation of the battery cell may also occur, and when determining whether the battery cell is defective based on the capacity value of the battery cell in the charging/discharging process, the problem of poor selection may occur.
[46]
Accordingly, the present invention provides a battery charging/discharging system including a cooling unit capable of uniformly distributing the flow rate. In particular, the battery charge/discharge system according to the present invention includes n perforated plates forming a laminated structure on the air flow path of the cooling unit, so that the flow rate passing through the holes of the perforated plate can be uniformly maintained. Accordingly, the battery charge/discharge system according to the present invention can minimize a temperature deviation between a plurality of battery cells disposed on the tray.
[47]
[48]
Hereinafter, a battery charge/discharge system including a cooling unit capable of uniformly distributing a flow rate according to the present invention will be described in detail.
[49]
In one example, a battery charging/discharging system according to the present invention includes a tray accommodating a plurality of battery cells; a charge/discharge unit electrically connected to first and second electrode leads formed in the plurality of battery cells housed in the tray; and a cooling unit for cooling the plurality of battery cells housed in the tray. Single In an embodiment, the cooling unit includes an air supply unit positioned above the tray and n perforated plates (n is an integer of 2 or more) located on a blowing passage by the air supply unit and forming a laminated structure.
[50]
In one embodiment, the tray is a substantially rectangular box-shaped member with an open top, and a plurality of battery cells are arranged and mounted in a matrix shape therein. At this time, the height of the tray is formed to substantially correspond to the height of the battery cell. In addition, the tray has a structure in which both sides of the tray are perforated so that the first and second electrode leads of the stored battery cells can protrude. In a specific example, both sides of the tray are perforated, so that the first and second electrode leads of the battery cells accommodated in the tray can be connected to the outside. For example, first and second electrode leads of battery cells accommodated in the tray are electrically connected to a charging/discharging unit to be described later.
[51]
In one embodiment, the charge/discharge unit is located on both sides of the tray and is electrically connected to first and second electrode leads of a plurality of battery cells accommodated in the tray. In a specific example, the charge/discharge unit may be coupled to supply power to a plurality of battery cells accommodated in the tray to charge/discharge the battery cells according to a set charge/discharge time, voltage, or number of times. Furthermore, a control unit (not shown) capable of performing and controlling various tasks, such as monitoring the charging/discharging state of the battery cell during the charging/discharging process and moving to the original position after completing the task, is included. A detailed description thereof will be omitted.
[52]
In one embodiment, the battery charge/discharge system according to the present invention includes a cooling unit for cooling a plurality of battery cells housed in a tray. In a specific example, in a battery charge/discharge system, when the temperature of a battery cell is, for example, 50° C. or higher while the battery cell is being charged and discharged, not only the efficiency or performance of the battery cell is reduced, but also the durability is reduced. Risk to heat (eg, partial burnout, explosion, etc.) may be increased. Therefore, it is preferable to reduce the temperature of the battery by the cooling unit according to the present invention by discharging heat generated during charging and discharging of the battery cell. In addition, in the process of discharging heat during the charging and discharging process of these battery cells, it is desirable that the battery cells in the same battery cell stack emit heat uniformly or equally and reduce the temperature deviation as much as possible. This is because efficiency, stability, and durability can be affected.
[53]
In one embodiment, the cooling unit may cool the plurality of battery cells by guiding air in a direction parallel to the plurality of battery cells accommodated in the tray. In a specific example, the cooling unit includes an air supply unit located above the tray, and n perforated plates located on a blowing passage by the air supply unit and forming a laminated structure. Here, n is an integer greater than or equal to 2.
[54]
In one embodiment, the air supply is a commonly used propeller-type blowing fan, located on top of the tray. In addition, it is installed on top of n perforated plates to be described later to blow air downward. As described above, the air blown downward may be introduced into the tray through an air flow path perforated in the perforated plate. In addition, the air supply unit includes a plurality, and is equally divided and disposed on the upper part of the tray. The cooling unit may include a structure in which 2 to 5 perforated plates are stacked, or a structure in which 3 to 5 perforated plates are stacked. For example, three perforated plates may be stacked.
[55]
In one embodiment, the n perforated plates serve to introduce air blown by the air supply unit into the tray. For example, since the cooling unit includes three perforated plates, the air blown by the air supply unit passes through holes formed in the three perforated plates, so that the flow rate can be gradually uniform.
[56]
In one embodiment, the perforated plate has a structure in which a plurality of holes are formed as described above, and the holes are formed in a central region of the perforated plate. In particular, with this structure, less air is supplied to the direction in which the battery cells housed in the outermost part of the tray are located compared to the prior art, thereby balancing the temperature deviation of the battery cells housed in the tray. Accordingly, it is possible to uniformly distribute the flow rate, thereby minimizing the temperature deviation between the plurality of battery cells.
[57]
In another embodiment, the perforated plate has a structure in which a plurality of holes are formed as described above, and the diameter of the hole formed in the central region of the perforated plate is larger than the diameter of the hole formed in the edge region of the perforated plate. Specifically, the holes formed in the perforated board are gradually formed with a smaller diameter from the center area to the edge area. The above structure is to supply air from the air supply unit to a tray in which a plurality of battery cells are accommodated, but reduce an amount of air supplied to an edge area of ​​the tray.
[58]
In another embodiment, the perforated plate has a structure in which a plurality of parallel slits are formed. Air supplied from the air supply unit may be introduced into the tray through a plurality of slits formed in the perforated plate. In a specific example, the slit has a structure formed in a direction parallel to an accommodating direction of battery cells stored in a tray, and in particular, the slit may be formed in a central region of a perforated plate.
[59]
In another embodiment, the perforated plate has a structure in which a plurality of parallel slits are formed. Air supplied from the air supply unit may be introduced into the tray through a plurality of slits formed in the perforated plate. In a specific example, the slit is a structure formed in a direction parallel to the storage direction of the battery cells accommodated in the tray. Meanwhile, the width of the slits formed in the central region of the perforated plate is greater than the width of the slits formed in the edge region of the perforated plate. For example, the hole formed in the perforated plate may be gradually formed with a smaller width as it goes from the center area to the edge area. The above structure is to supply air from the air supply unit to a tray in which a plurality of battery cells are accommodated, but reduce an amount of air supplied to an edge area of ​​the tray.
[60]
[61]
In another embodiment, a battery charging/discharging system according to the present invention includes a tray accommodating a plurality of battery cells; a charge/discharge unit electrically connected to first and second electrode leads formed in the plurality of battery cells housed in the tray; and a cooling unit for cooling a plurality of battery cells housed in the tray.
[62]
In another example, the cooling unit may cool the plurality of battery cells by guiding air in a direction parallel to the plurality of battery cells accommodated in the tray. Specifically, the cooling unit includes an air supply unit located above the tray and n perforated plates located on a blowing passage by the air supply unit and forming a laminated structure. Here, n is an integer greater than or equal to 2.
[63]
Meanwhile, the holes formed in the n perforated plates may have different sizes and shapes for each layer. In a specific example, the uppermost perforated plate may have a plurality of holes formed in the central region of the perforated plate, and the lowermost perforated plate may have a plurality of holes formed over the entire area of ​​the perforated plate. Meanwhile, the size of the holes of the perforated plate may gradually decrease from the top to the bottom.
[64]
In particular, with this structure, less air is supplied to the direction in which the battery cells housed in the outermost part of the tray are located compared to the prior art, thereby balancing the temperature deviation of the battery cells housed in the tray. Accordingly, it is possible to uniformly distribute the flow rate, thereby minimizing the temperature deviation between the plurality of battery cells.
[65]
[66]
In addition, the battery charging/discharging system according to the present invention may include a sub air supply unit. In a specific example, the sub air supply unit blows cooling air toward the battery cells from the side of the tray. The sub air supply unit may be installed to face both sides of the tray so as to induce air in a direction parallel to the plurality of battery cells.
[67]
In one embodiment, a plurality of battery cells housed in a tray has a structure vertically arranged, and the cooling unit blows air of a downward airflow through a blowing fan located on top of the tray. Meanwhile, the battery cell may refer to a battery cell stack in which 2 to 30, 5 to 20, or 10 to 16 battery cells are stacked.
[68]
In one embodiment, the plurality of battery cells stored in the tray may be pouch-type battery cells. In a specific example, the battery cell is a pouch-type unit cell, and an electrode assembly having an anode/separator/cathode structure is embedded in a laminate sheet casing while being connected to electrode leads formed outside the casing. The electrode leads are pulled out to the outside of the sheet and may extend in the same or opposite directions.
[69]
In the drawing of the present invention, only a pouch type battery cell having a form in which a pair of electrode leads are drawn out in opposite directions is shown for convenience of drawing, but the battery cell applied to the battery module according to the present invention is necessarily limited to this This is not the case, and it is also possible when a pair of electrode leads are drawn out in the same direction as each other.
[70]
Furthermore, the battery charge/discharge system according to the present invention may further include a temperature sensor for measuring the temperature of the battery cell. In a specific example, it is possible to determine whether or not the cooling unit is out of order by using a temperature sensor. For example, the control unit may automatically determine a rapid temperature change of a temperature sensor and generate a warning.
[71]
Mode for Carrying Out the Invention
[72]
Hereinafter, the present invention will be described in more detail through drawings and the like. However, since the configuration described in the drawings described in this specification is only one embodiment of the present invention and does not represent all of the technical spirit of the present invention, it is understood that there may be various equivalents and modifications that can replace them. shall.
[73]
[74]
(First Embodiment)
[75]
3 is a schematic diagram of a battery charging/discharging system according to an embodiment of the present invention. Referring to FIG. 3, the battery charging and discharging system 100 according to the present invention includes a number of a tray 110 accommodating the battery cells 111; a charging/discharging unit 120 electrically connected to the first and second electrode leads formed in the plurality of battery cells 111 accommodated in the tray 110 ; and a cooling unit 130 for cooling the plurality of battery cells 111 accommodated in the tray 110 .
[76]
First, the tray 110 is a substantially rectangular box-shaped member with an open top, and a plurality of battery cells 111 are arranged and mounted in a matrix shape therein. In this case, the height of the tray 110 is formed to approximately correspond to the height of the battery cell 111 . In addition, the tray 110 has a structure in which both sides of the tray 110 are perforated so that the first and second electrode leads of the stored battery cells can protrude. Specifically, both sides of the tray 110 are perforated, so that the first and second electrode leads of the battery cell 111 accommodated in the tray 110 can be connected to the outside. For example, the first and second electrode leads of the battery cell 111 accommodated in the tray 110 are electrically connected to a charging/discharging unit 120 to be described later.
[77]
In addition, the charging/discharging unit 120 is located on both sides of the tray 110 , and is electrically connected to the first and second electrode leads of the plurality of battery cells 111 accommodated in the tray 110 . Specifically, the charging/discharging unit 120 is coupled to supply power to the plurality of battery cells 111 accommodated in the tray 110 to charge the battery cells 111 with a set charging/discharging time, voltage, number of times, etc. can be discharged. Furthermore, it includes a controller (not shown) capable of performing and controlling various operations such as monitoring the charging/discharging state during the charging/discharging process of the battery cell 111 and moving to the original position after completing the operation. A detailed description thereof will be omitted.
[78]
The cooling unit 130 may cool the plurality of battery cells 111 by inducing air in a direction parallel to the plurality of battery cells 111 accommodated in the tray 110 . Specifically, the cooling unit 130 is located on the air supply unit 131 located on the upper portion of the tray 110, and the air supply path by the air supply unit 131, the n number of perforated plates 132 forming a stacked structure. ), including Here, n is an integer of 2 or more.
[79]
The air supply unit 131 is a generally widely used propeller-type blowing fan, and is located on the upper portion of the tray 110 . And, it is installed on the upper portion of the n number of perforated plate 132 to be described later to blow air to the lower portion. The air blown downward as described above may be introduced into the tray through an air flow path perforated in the perforated plate. In addition, the air supply unit 131 includes a plurality and is equally divided and disposed on the upper portion of the tray 110 . Although it is illustrated in FIG. 3 to include six blower fans, the present invention is not limited thereto.
[80]
The cooling unit 130 according to the present invention is configured to include n perforated plates 132 as described above. Although three perforated plates 132 are shown in FIG. 3 , the present invention is not limited thereto.
[81]
Furthermore, the battery charging/discharging system 100 according to the present invention includes a sub air supply unit 140 . The sub air supply unit 140 blows cooling air from the side of the tray 110 toward the battery cell 111 . The sub air supply unit 140 is installed to face the opposite sides of the tray so as to induce air in a direction parallel to the plurality of battery cells.
[82]
[83]
4 is a diagram schematically showing a cooling unit of a battery charging/discharging system according to an embodiment of the present invention. Referring to FIG. 4 , the three perforated plates 132 serve to introduce air blown by the air supply unit into the tray 110 . In particular, since the cooling unit 130 includes three perforated plates 132 , the air blown by the air supply unit 131 passes through the holes formed in the three perforated plates so that the flow rate can be gradually uniformed.
[84]
Meanwhile, the perforated plate 132 has a structure in which a plurality of holes 1321 are formed as described above, and the holes 1321 are formed in a central region of the perforated plate 132 . In particular, with this structure, less air is supplied to the direction in which the battery cells 111 stored in the outermost part of the tray 110 are located compared to the prior art, so that the temperature deviation of the battery cells accommodated in the tray 110 can be balanced. can Accordingly, it is possible to uniformly distribute the flow rate, thereby minimizing the temperature deviation between the plurality of battery cells.
[85]
[86]
In this regard, when the battery charging/discharging system including the cooling unit according to the first embodiment of the present invention and the conventional battery charging/discharging system were applied, the temperature according to the position of the battery cells accommodated in the tray was measured. And, the result is shown in FIG.
[87]
FIG. 5 is a graph showing temperature measurements of battery cells stored in a tray according to positions when a battery charge/discharge system including a cooling unit according to the first embodiment of the present invention and a conventional charge/discharge system are used.
[88]
Referring to FIG. 5 , in the case of the conventional battery charging/discharging system, the measured temperature of the battery cells located at the outermost portion of the tray was 31°C, and the temperature of the battery cells located in the central region was 41°C. That is, the temperature of the battery cells was different depending on the position of the tray, and the temperature deviation was large. On the other hand, according to the battery charging/discharging system of the present invention, the temperature difference between the 16 battery cells accommodated in the tray was small. It is determined that by including three perforated plates in the cooling unit, uniform distribution of the flow rate is possible, thereby minimizing the temperature deviation between a plurality of battery cells.
[89]
[90]
(Second embodiment)
[91]
6 is a view schematically showing a perforated plate of a cooling unit in another embodiment of the battery charging/discharging system according to the present invention. Referring to FIG. 6 , the perforated plate 232 according to the present invention has a structure in which a plurality of holes 2321 are formed. Air supplied from the air supply unit may be introduced into the tray through the plurality of holes 2321 formed in the perforated plate 232 .
[92]
Meanwhile, the diameter of the hole 2321 formed in the central region of the perforated plate 232 is larger than the diameter of the hole 2321 formed in the edge region of the perforated plate 232 . Specifically, the hole 2321 formed in the perforated plate 232 is gradually formed to have a smaller diameter from the center region to the edge region.
[93]
The structure is to supply air from the air supply unit to the tray in which the plurality of battery cells are accommodated, but to reduce the amount of air supplied to the edge region of the tray.
[94]
The description of each configuration has been described above, and a detailed description of each configuration will be omitted.
[95]
[96]
(Third embodiment)
[97]
7 is a diagram schematically showing a perforated plate of a cooling unit in a battery charging/discharging system according to another embodiment of the present invention. Referring to FIG. 7 , the perforated plate 332 according to the present invention has a structure in which a plurality of parallel slits 3322 are formed. Air supplied from the air supply unit may be introduced into the tray through the plurality of slits 3322 formed in the perforated plate 332 .
[98]
The slit 3322 has a structure formed in a direction parallel to the receiving direction of the battery cells accommodated in the tray, and in particular, the slit 3322 has a structure formed in the central region of the perforated plate 332 .
[99]
The structure is to supply air from the air supply unit to the tray in which the plurality of battery cells are accommodated, but to reduce the amount of air supplied to the edge region of the tray.
[100]
The description of each configuration has been described above, and a detailed description of each configuration will be omitted.
[101]
[102]
(Fourth embodiment)
[103]
8 is a diagram schematically illustrating a perforated plate of a cooling unit in a battery charging/discharging system according to another embodiment of the present invention. Referring to FIG. 8 , the perforated plate 432 according to the present invention has a structure in which a plurality of parallel slits 4322 are formed. Air supplied from the air supply unit may be introduced into the tray through the plurality of slits 4322 formed in the perforated plate 432 .
[104]
The slit 4322 has a structure formed in a direction parallel to the receiving direction of the battery cell accommodated in the tray. Meanwhile, the width of the slit 4322 formed in the central region of the perforated plate 432 is larger than the width of the slit 4322 formed in the edge region of the perforated plate 432 . In detail, the hole 4321 formed in the perforated plate 432 is gradually formed to have a smaller width from the center area to the edge area.
[105]
The structure is to supply air from the air supply unit to the tray in which the plurality of battery cells are accommodated, but to reduce the amount of air supplied to the edge region of the tray.
[106]
The description of each configuration has been described above, and a detailed description of each configuration will be omitted.
[107]
[108]
(fifth embodiment)
[109]
9 is a schematic diagram of a battery charging/discharging system according to another embodiment of the present invention.
[110]
Referring to FIG. 9 , the battery charging/discharging system 500 according to the present invention includes a tray 510 accommodating a plurality of battery cells 511 ; a charging/discharging unit (not shown) electrically connected to first and second electrode leads formed in the plurality of battery cells 511 accommodated in the tray 510 ; and a cooling unit 530 for cooling the plurality of battery cells 511 accommodated in the tray 510 .
[111]
The cooling unit 530 may cool the plurality of battery cells 511 by inducing air in a direction parallel to the plurality of battery cells 511 accommodated in the tray 510 . Specifically, the cooling unit 530 is located on the air supply unit 531 located on the upper portion of the tray 510, and the air supply unit 531, but located on the air flow path, the n number of perforated plates 532 forming a stacked structure. ), including Here, n is an integer of 2 or more. Although three perforated plates 532 are shown in FIG. 9 , the present invention is not limited thereto.
[112]
The three perforated plates 532 serve as the tray 510 for air blown by the air supply unit 531 .serves to introduce into the In particular, the cooling unit 530 includes three perforated plates 532, so that the air blown by the air supply unit 531 passes through the holes 5321 formed in the three perforated plates 532 so that the flow rate is gradually increased. can be uniform.
[113]
Meanwhile, the holes 5321 formed in the three perforated plates have different sizes and shapes for each layer. Specifically, the perforated plate 532 located at the top has a plurality of holes 5321 formed, the hole 5321 is formed in the central region of the perforated plate 532, and the perforated plate 532 located at the bottom has a plurality of holes 5321 ) is formed, but it is a structure formed over the entire area of ​​the perforated board. Meanwhile, the size of the hole 5321 of the perforated plate 532 gradually decreases from the top to the bottom.
[114]
In particular, by this structure, less air is supplied to the direction in which the battery cells 511 housed in the outermost part of the tray 510 are located compared to the prior art, thereby balancing the temperature deviation of the battery cells housed in the tray 510. can Accordingly, it is possible to uniformly distribute the flow rate, thereby minimizing the temperature deviation between the plurality of battery cells 511 .
[115]
[116]
The above description is merely an example of the technical idea of ​​the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the drawings disclosed in the present invention are not intended to limit the technical idea of ​​the present invention, but to explain, and the scope of the technical idea of ​​the present invention is not limited by these drawings. The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.
[117]
Meanwhile, terms indicating directions such as up, down, left, right, front, and back are used in this specification, but these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer. It is self-evident that it can
[118]
[119]
[Description of code]
[120]
1: battery cell
[121]
10, 100: battery charging and discharging system
[122]
11, 110: tray
[123]
111, 511: battery cell
[124]
12, 120: charging and discharging unit
[125]
13, 130: cooling unit
[126]
131, 531: air supply unit
[127]
132, 232, 332, 432, 532: perforated board
[128]
1321, 2321, 5321: Hall
[129]
3322, 4322: slits
Claims
[Claim 1]
A tray accommodating a plurality of battery cells; a charge/discharge unit electrically connected to first and second electrode leads formed in the plurality of battery cells housed in the tray; and a cooling unit for cooling the plurality of battery cells housed in the tray, wherein the cooling unit is located on an air supply unit located above the tray and a blowing passage by the air supply unit, but n perforated plates forming a laminated structure. (n is an integer greater than or equal to 2).
[Claim 2]
The battery charge/discharge system according to claim 1, wherein the perforated plate has a structure in which a plurality of holes are formed, and the holes are formed in a central region of the perforated plate.
[Claim 3]
The battery charge/discharge system according to claim 1, wherein the perforated plate has a structure in which a plurality of holes are formed, and the diameter of the hole formed in the central region of the perforated plate is larger than the diameter of the hole formed in the edge region of the perforated plate.
[Claim 4]
The battery charging/discharging system according to claim 1, wherein the perforated plate has a structure in which a plurality of parallel slits are formed, and the slits are formed in a central region of the perforated plate.
[Claim 5]
The battery charge/discharge system according to claim 1, wherein the perforated plate has a structure in which a plurality of parallel slits are formed, and the width of the slits formed in the central region of the perforated plate is greater than the width of the slits formed in the edge region of the perforated plate.
[Claim 6]
The battery charging/discharging system of claim 1, wherein the cooling unit has a structure in which 2 to 5 perforated plates are stacked.
[Claim 7]
The battery charging/discharging system of claim 1 , wherein the cooling unit includes a plurality of air supply units, and the air supply units are equally divided and disposed on the top of the tray.
[Claim 8]
The battery charging/discharging system according to claim 1, wherein the air supply unit is a blowing fan.
[Claim 9]
The battery charge/discharge system according to claim 1, wherein the plurality of battery cells accommodated in the tray have a structure in which they are vertically arranged, and the cooling unit blows downward airflow through a blower fan positioned above the tray.
[Claim 10]
The battery charge/discharge system according to claim 1, wherein the plurality of battery cells accommodated in the tray are pouch-type battery cells.
[Claim 11]
The battery charge/discharge system of claim 1 , wherein the tray has an open side structure, and the cooling unit further includes a sub air supply unit for blowing cooling air toward battery cells from a side surface of the tray.
[Claim 12]
The battery charging/discharging system according to claim 1, further comprising a temperature sensor for measuring the temperature of the battery cells accommodated in the tray.