Battery pack temperature control system

Abstract

The present invention provides a battery pack temperature control system capable of cooling and heating a battery pack including a plurality of battery cells, the battery pack temperature control system comprising: a plate on which a battery pack including a plurality of battery cells is seated and installed; a temperature control unit provided under the plate to cool and heat the battery pack; a heat dissipation unit provided at one side of the plate to dissipate heat generated in the battery pack; and a control unit connected to the temperature control unit and heat dissipation unit so as to be able to control same.

Description

Battery pack temperature control system

[0001] The present invention relates to a battery pack temperature control system, and more particularly, to a battery pack temperature control system capable of cooling and heating a battery pack including a plurality of battery cells.

[0002] Recently, rechargeable secondary batteries have been widely used as an energy source.

[0003] These secondary batteries are manufactured in pack form with multiple battery cells and are used in portable electronic devices, etc.

[0004] Secondary batteries are manufactured in pack form and used as a power source for ESS (energy storage devices) and electric vehicles, and demand for battery packs that house multiple secondary batteries electrically connected in series or parallel is increasing.

[0005] These battery packs include an external housing made of metal to accommodate and store multiple secondary batteries.

[0006] Secondary batteries can be manufactured in various shapes, including pouch, cylindrical, and square shapes.

[0007] Here, since secondary batteries generate heat during charging and discharging, and also generate heat when the secondary batteries operate, if the heat generated is not efficiently cooled, there is a problem of reduced stability, such as a shortened lifespan of the secondary batteries and malfunctions.

[0008] In order to solve the above-described problem, a technology has been proposed in which a cooling system is provided to cool a container in which a battery pack is placed, a coolant inlet is formed on one side of the bottom of the battery pack to allow coolant to flow, a coolant outlet is formed on the other side of the bottom connected to the coolant inlet by a flow path, and the coolant including the coolant introduced through the coolant inlet passes through the flow path to cool it.

[0009] These cooling systems have the problem of requiring a chiller to circulate coolant, forming a complex water pipe system to circulate coolant and cool the battery pack, and satisfying separate waterproofing conditions to prevent coolant leakage and seepage.

[0010] Accordingly, a cooling system is required that does not require a chiller or water pipes for circulating cooling water, that easily secures space through this, increases energy density, and is relatively free from waterproof conditions.

[0011] In addition, since the cooling system is simply configured to cool the battery pack, there are problems such as the inconvenience of having to install a separate battery pack heating system to heat the battery pack to a certain temperature or higher to facilitate use in the low temperatures of winter, as well as the associated cost burden.

[0012] The present invention is intended to solve the above-mentioned problems and provides a battery pack temperature control system capable of cooling and heating a battery pack.

[0013] In addition, the present invention aims to provide a battery pack temperature control system that is easy to secure space by not requiring a chiller and water pipes for circulating coolant, enables temperature uniformity between battery cells, increases energy density, and is relatively free from waterproof conditions.

[0014] In addition, the technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0015] In order to achieve the above-described purpose, a battery pack temperature control system according to the present invention may include a plate on which a battery pack including a plurality of battery cells is mounted on an upper side, a temperature control unit provided on a lower side of the plate to cool and heat the battery pack, a heat dissipation unit provided on one side of the plate to dissipate heat generated from the battery pack, and a control unit capable of controlling at least one of the temperature control unit and the heat dissipation unit.

[0016] The above plate may be formed as a plate body, and may further include a connecting frame interposed between the plate and the temperature control unit, and may be characterized in that a reinforcing piece having a constant length in the width direction is protruded on both sides of the longitudinal direction of the connecting frame.

[0017] The temperature control unit may be characterized by including at least one heat-conducting plate provided on the lower side of the plate, and at least one thermoelectric element provided on the heat-conducting plate.

[0018] The above heat-conducting plate may be characterized in that it can be spaced apart in a second axis direction intersecting the first axis direction with respect to an imaginary first axis direction crossing the plate.

[0019] The above thermoelectric element may be characterized as a Peltier element capable of cooling and heating a plate.

[0020] The above thermoelectric element may be characterized in that a first surface is arranged on the lower side of the plate to cool or heat the plate, and a second surface is arranged on the upper side of the heat-conducting plate, and when the plate is cooled or heated through the first surface, heat or cold generated on the second surface is conducted and released through the heat-conducting plate.

[0021] The above heat-conducting plate may be characterized by including a plurality of installation parts formed at regular intervals in the longitudinal direction of the upper side so that a thermoelectric element is installed, and a heat movement path formed between each of the installation parts to move heat generated in the heat-conducting plate.

[0022] The above heat transfer path may be characterized by being formed as a pattern of engraved patterns on the edge centered on the installation part.

[0023] The lower side of the above plate may be provided with a cover body that surrounds the temperature control unit to secure the temperature control unit to the plate.

[0024] The above heat dissipation unit may be characterized by including a heat dissipation unit including at least one heat dissipation fin arranged on the upper surface of one end of each heat conduction plate in a form perpendicular to each heat conduction plate, and an exhaust unit that collects and exhausts high-temperature air or low-temperature air discharged from the heat dissipation unit.

[0025] As described above, the present invention having the above-described configuration can effectively cool and heat a battery pack, does not require a chiller or a water pipe for circulating coolant, thus making it easy to secure space, increases energy density, is relatively free from waterproof conditions, and has the effect of enabling temperature uniformity between battery cells.

[0026] In addition, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0027] FIG. 1 is a drawing showing a battery pack temperature control system according to a first embodiment of the present invention.

[0028] FIG. 2 is a drawing showing the lower side of a battery pack temperature control system according to the first embodiment of the present invention.

[0029] FIG. 3 is a drawing showing the lower structure of a battery pack temperature control system according to the first embodiment of the present invention.

[0030] FIG. 4 is an enlarged drawing showing a part of a temperature control unit of a battery pack temperature control system according to the first embodiment of the present invention.

[0031] FIG. 5 is a drawing showing a battery pack installed in a battery pack temperature control system according to the first embodiment of the present invention.

[0032] FIG. 6 is a flowchart showing a method for preventing condensation in a battery pack temperature control system according to a first embodiment of the present invention.

[0033] FIG. 7 is a drawing showing a battery pack temperature control system according to a second embodiment of the present invention.

[0034] FIG. 8 is a drawing showing the lower side of a battery pack temperature control system according to a second embodiment of the present invention.

[0035] FIG. 9 is a drawing showing the lower structure of a battery pack temperature control system according to a second embodiment of the present invention.

[0036] FIG. 10 is an enlarged view showing a part of a temperature control unit of a battery pack temperature control system according to a second embodiment of the present invention.

[0037] Fig. 11 is an enlarged drawing showing a heat conduction plate of a battery pack temperature control system according to a third embodiment of the present invention.

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Furthermore, these embodiments are not intended to limit the scope of the present invention, but rather are presented merely as examples. Various modifications are possible without departing from the technical scope thereof.

[0039] The present invention can have various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail.

[0040] However, this is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and alternatives that fall within the spirit and technical scope of the present invention. Similar reference numerals have been used to designate similar components throughout the description of each drawing.

[0041] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0042] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0043] (First embodiment)

[0044] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0045] FIG. 1 is a drawing showing a battery pack temperature control system according to a first embodiment of the present invention. FIG. 2 is a drawing showing the lower side of the battery pack temperature control system according to the first embodiment of the present invention. FIG. 3 is a drawing showing the lower structure of the battery pack temperature control system according to the first embodiment of the present invention. FIG. 4 is an enlarged drawing showing a part of the temperature control unit of the battery pack temperature control system according to the first embodiment of the present invention. FIG. 5 is a drawing showing a battery pack installed in the battery pack temperature control system according to the first embodiment of the present invention. FIG. 6 is a flowchart showing a method for preventing condensation in the battery pack temperature control system according to the first embodiment of the present invention.

[0046] As shown in the drawing, the battery pack temperature control system (1) according to the present invention is intended to prevent damage to the battery pack (3) or deterioration of the battery pack (3) due to heat generated when the battery pack (3) having a plurality of battery cells (not shown) installed therein is used, and to cool the battery pack (3) so that the temperature distribution among the battery cells is uniform.

[0047] In addition, it is to heat the battery pack (3) to a predetermined temperature in the low temperature of winter to facilitate the use of the battery cells.

[0048] Here, the battery pack (Battery Pack, 3) may be installed with multiple pouch-type battery cells (Battery Cells) in which a positive electrode (not shown), a negative electrode (not shown), a separator (not shown), and an electrolyte (not shown) are mounted in an aluminum case, or may be installed with multiple jelly roll type batteries, cylindrical or square batteries, but is not limited thereto.

[0049] Specifically, the battery pack temperature control system (1) according to the present invention for cooling and heating a battery pack (3) may include a plate (10), a temperature control unit (30), a heat dissipation unit (50), and a control unit (not shown).

[0050] The above plate (10) can have a battery pack (3) in the form of a case including a plurality of battery cells installed on the upper side.

[0051] Specifically, the plate (10) is formed as a rectangular parallelepiped made of a metal material, and the lower side of the battery pack (3) can be placed in contact with it.

[0052] A connecting frame (10a) for connecting the plate (10) and the temperature control unit (30) may be provided on the lower side of the above plate (10).

[0053] The above-described connecting frame (10a) may be formed with a through hole (not shown) formed in the center so that the heat-conducting plate (31) and the thermoelectric element (35) of the temperature control unit (30) described later are exposed, and may be formed as a frame body that surrounds the heat-conducting plate (31) and the thermoelectric element (35).

[0054] Reinforcing pieces (11, 11') having a constant length in the width direction are formed protrudingly on both sides of the longitudinal direction of the above connecting frame (10a), thereby preventing deformation and twisting of the connecting frame (10a).

[0055] Accordingly, the plate (10) can be formed with a length corresponding to the distance between each reinforcing piece (11, 11') so as to be interposed between each reinforcing piece (11, 11') that protrudes in the width direction on both sides of the longitudinal direction of the connecting frame (10a).

[0056] The above temperature control unit (30) is provided on the lower side of the plate (10) and can cool and heat the battery pack (3).

[0057] Specifically, the temperature control unit (30) may include at least one heat-conducting plate (31) provided on the lower side of the plate (10) and the connecting frame (10a) and at least one thermoelectric element (35) provided on the upper side of the heat-conducting plate (31).

[0058] The above heat-conducting plate (31) is in the form of a long flat plate, and is formed to be long in the longitudinal direction of the plate (10) and the connecting frame (10a), but may be arranged in multiples at a constant interval in the width direction of the plate (10) and the connecting frame (10a). That is, the heat-conducting plate (31) may be arranged along a second axis, which is a direction intersecting the first axis with respect to the imaginary first axis direction, which is the width direction of the plate (10).

[0059] In one embodiment of the present invention, the heat-conducting plates (31) are arranged in four pieces at a constant interval in the width direction of the connecting frame (10a), but it is preferable that the number of the heat-conducting plates (31) be formed to correspond to the size of the battery pack (3) and the size of the connecting frame (10a).

[0060] In addition, in one embodiment of the present invention, the heat-conducting plates (31) are arranged in multiple numbers on the lower side of the connecting frame (10a), but it is also possible for the heat-conducting plates (31) to be formed as one having the same size as the connecting frame (10a) and to be arranged on the lower side of the plate (10) and the connecting frame (10a), but the present invention is not limited thereto and can be changed in various ways.

[0061] Here, the thermoelectric element (35) may be a Peltier element for cooling and heating the plate (10).

[0062] The above thermoelectric element (35) has a first surface (35a) arranged on the lower surface of the plate (10) to cool the plate (10), and a second surface (35b) arranged on the upper surface of the heat-conducting plate (31), and can conduct heat generated from the second surface (35b) to the heat-conducting plate (31) to dissipate heat.

[0063] At this time, the first surface (35a) may be a cooling surface, and the second surface (35b) may be a heating surface.

[0064] Meanwhile, in winter, the battery pack (3) may have difficulty functioning properly due to low temperatures. Therefore, the battery pack (3) can be heated by switching the power supply electrode of the thermoelectric element (35) composed of a Peltier element in the temperature control unit (30).

[0065] Accordingly, the plate (10) can be heated by the first surface (35a) disposed on the lower side of the plate (10), and the cold air generated from the second surface (35b) disposed on the upper side of the heat-conducting plate (31) can be conducted to the heat-conducting plate (31) and released.

[0066] At this time, the first surface (35a) disposed on the lower side of the plate (10) may be a heating surface, and the second surface (35b) disposed on the upper side of the heat conducting plate (31) may be a cooling surface.

[0067] The temperature control unit (30) according to one embodiment of the present invention can control the temperature of the battery pack (3) as a whole through cooling and heating.

[0068] Accordingly, when cooling or heating the battery pack (3) through the thermoelectric element (35), the heat or cold generated from the thermoelectric element (35) is dissipated to the heat conducting plate (31), and the heat or cold dissipated to the heat conducting plate (31) can be conducted along the length direction of the heat conducting plate (31).

[0069] Here, the heat conduction plate (31) may form a heat transfer path (not shown) to transfer heat generated from the second surface (35b) when cooling the battery pack (3) through the first surface (35a) of the plurality of thermoelectric elements (35), but is not limited thereto.

[0070] At this time, the heat transfer path may be formed linearly between a plurality of thermoelectric elements (35), or may be formed in a pattern such as a circle or square.

[0071] Accordingly, the heat generated from the plurality of thermoelectric elements (35) can move along the heat conduction plate (31) or move along the heat movement path and then be released through the heat dissipation unit (50).

[0072] Meanwhile, the heat transfer path can transfer cold air generated from the second surface (35b) when the battery pack (3) is heated through the first surface (35a) of the plurality of thermoelectric elements (35), but is not limited thereto.

[0073] The above heat dissipation unit (50) is provided on one side of the plate (10) and can dissipate heat or cold air, i.e., high temperature air or low temperature air, generated from the battery pack (3).

[0074] Specifically, the heat dissipation unit (50) may include a heat dissipation unit (50a) formed by arranging a plurality of heat dissipation fins (not shown in the drawing) at regular intervals in the length direction of the heat conduction plate (31) on the upper surface of one end of each heat conduction plate (31) in a form perpendicular to each heat conduction plate (31), and a discharge unit (55) that collects and discharges high-temperature air or low-temperature air discharged from the heat dissipation unit (50a).

[0075] The above heat dissipation unit (50a) can discharge high temperature air or low temperature air generated by heat or cold air absorbed and conducted through the heat conducting plate (31) to the discharge unit (55).

[0076] Here, the heat dissipation unit (50a) can absorb heat or cold conducted to the heat conduction plate (31) through a plurality of heat dissipation fins arranged at regular intervals in a direction perpendicular to each heat conduction plate (31).

[0077] In one embodiment of the present invention, the heat dissipation portion (50a) is arranged in a direction perpendicular to the upper surface of each heat-conducting plate (31), but it is also possible for each heat dissipation portion (50a) to be formed as a single unit and arranged individually on each heat-conducting plate (31), and various other changes are possible.

[0078] The above discharge unit (55) is intended to collect and discharge high temperature air or low temperature air discharged upward through a plurality of heat dissipation fins of the heat dissipation unit (50a), and may be a rectangular parallelepiped housing with a hollow space (55a) formed therein.

[0079] Here, the lower side of the discharge portion (55) can be connected to the lower part of the heat dissipation portion (50a).

[0080] Meanwhile, the hollow (55a) formed from one side to the other side of the discharge portion (55) is for exhausting high temperature air or low temperature air discharged through the heat dissipation portion (50a) to the outside, and one side or the other side of the hollow (55a) can be applied as an inlet for supplying external air, and one side or the other side of the hollow (55a) can be applied as an outlet for exhausting high temperature air or low temperature air through air supplied from the outside.

[0081] For this purpose, an air supply unit (not shown) for supplying external air and discharging high-temperature air or low-temperature air may be connected to one or the other side of a hollow space (55a) formed through the discharge unit (55).

[0082] At this time, the air supply unit may include a pipe-shaped connecting duct (not shown) for connecting to one side or the other side of the discharge unit, and a fan (not shown) or air conditioner (not shown) for supplying air to the discharge unit through the connecting duct.

[0083] Accordingly, high temperature air or low temperature air discharged through the heat dissipation unit (50a) is captured in the hollow space (55a) of the discharge unit (55), and can be discharged through the outlet of the hollow space (55a) or discharged to the outside by air supplied from the outside to the inlet of the hollow space (55a).

[0084] The above control unit is controllably connected to the temperature control unit (30) and the heat release unit (50) and can control the operation of the temperature control unit (30) and the heat release unit (50). That is, the control unit can control at least one of the temperature control unit (30) and the heat release unit (50).

[0085] Specifically, when the heat generated from the battery pack (3) exceeds a preset reference temperature range, the control unit can drive the thermoelectric element of the temperature control unit (30) to cool the battery pack (3).

[0086] In addition, the control unit can heat the battery pack (3) by driving the thermoelectric element (35) of the temperature control unit when the temperature of the battery pack (3) is below the preset reference temperature range in the low temperature of winter.

[0087] To this end, the control unit can control the operation and cooling temperature of the thermoelectric element (35) to cool and heat the battery pack (3).

[0088] The control unit can control the external air supply to the heat dissipation unit (50) to discharge high temperature air or low temperature air by driving the temperature control unit (30).

[0089] Meanwhile, the temperature control unit (30) may be equipped with a temperature sensor (not shown), and the temperature sensor may be connected to the control unit.

[0090] Therefore, the control unit can control the cooling or heating temperature of the temperature control unit (30).

[0091] Here, the control unit may be provided on the lower side of the plate (10) or on one side of the heat dissipation unit (50), but is not limited thereto.

[0092] Meanwhile, a cover body (13) that surrounds the temperature control unit (30) may be provided on the lower side of the plate (10) to secure the temperature control unit (30).

[0093] That is, a cover body (13) in the shape of a “└┘” that wraps the heat-conducting plate (31) on which the thermoelectric element (35) is installed may be provided on the lower side of the connecting frame (10a) of the plate (10) so as to be fixed to the connecting frame (10a) provided on the lower side of the plate (10).

[0094] Accordingly, the inner upper surface of the cover body (13) is arranged to be in contact with the lower surface of the heat conducting plate (31), and the cover body (13) can be fixedly installed to the lower side of the connecting frame (10a) using a fastening member such as a bolt.

[0095] Meanwhile, the lower side of the above-mentioned connecting frame (10a) may further include a plurality of fixing members (15) formed in a lengthwise direction of the connecting frame (10a) but spaced apart at regular intervals in the widthwise direction of the connecting frame (10a).

[0096] Here, the above-mentioned fixed member (15) can be provided between each cover body (13) and can be formed in a “└┘” shape.

[0097] A plurality of fixing members (15) are provided on the lower side of the connecting frame (10a) to prevent deformation and twisting of the plate (10) on which the battery pack (3) is installed and the connecting frame (10a).

[0098] Meanwhile, a plurality of joining holes (not shown in the drawing) for joining with fastening members such as bolts may be formed in the above plate (10), the connecting frame (10a), the cover body (13), and the fixing member (15).

[0099] Hereinafter, the operation process of the battery pack temperature control system according to the first embodiment of the present invention will be briefly described.

[0100] First, a battery pack (3) including a plurality of battery cells is installed in a battery pack temperature control system (1) according to the present invention.

[0101] After installing the battery pack (3) on the above plate (10), if the temperature of the battery pack (3) exceeds the preset reference temperature range due to charging / discharging or use of the battery pack (3), the temperature control unit (30) is driven.

[0102] Specifically, a plurality of thermoelectric elements (35) that are in surface contact with the first surface (35a) on the lower surface of the plate (10) are operated to cool the plate (10) that is in contact with the first surface (35a), which is the cooling surface.

[0103] When the temperature of the battery pack (3) falls within the preset reference temperature range due to cooling of the plate (10), the operation of the thermoelectric element (35) is stopped.

[0104] Therefore, cooling of the battery pack (3) is performed by repeatedly controlling the operation of the thermoelectric element (35) according to the temperature of the battery pack (3).

[0105] Meanwhile, when the thermoelectric element (35) for cooling the battery pack (3) operates, heat is generated through the second surface (35b), which is a heating surface opposite to the first surface (35a), which is a cooling surface, of the thermoelectric element (35), and the generated heat is conducted through the heat conducting plate (31).

[0106] At this time, the heat generated from the second surface (35b) of the plurality of thermoelectric elements (35) is conducted along the length direction of the heat conducting plate (31), absorbed by the heat dissipation portion (50a) of the heat dissipation portion (50) formed at one end of the heat conducting plate (31), and then discharged to the discharge portion (55).

[0107] That is, the heat conducted through the heat conducting plate (31) is absorbed through a plurality of heat dissipation fins of the heat dissipation portion (50a) arranged to span one end of each heat conducting plate (31), and the absorbed heat is captured in the hollow portion (55a) of the discharge portion (55).

[0108] In this way, the heat captured in the hollow space (55a) of the discharge unit (55) is discharged to one side or the other side of the hollow space (55a) by air supplied from the outside through one side or the other side of the hollow space (55a).

[0109] Here, the heat generated from the thermoelectric element (35) is conducted through the heat conducting plate (31), and is then conducted along the length of the heat conducting plate (31) and then discharged to the heat dissipation portion (50), thereby uniformly maintaining the cooling temperature of the battery cells mounted inside the battery pack (3).

[0110] Meanwhile, the power supply electrode of the thermoelectric element (35) of the temperature control unit (30) is switched to heat the battery pack (3) at low temperatures in winter.

[0111] That is, by switching the power supply electrode supplied to the thermoelectric element (35) of the temperature control unit (30), the plate (10) is heated through the first surface (35a) disposed on the lower side of the plate (10), thereby maintaining the battery pack (3) at a certain temperature or higher.

[0112] At this time, the thermoelectric element (35) generates cold air through the second surface (35b), which is a cooling surface, and the cold air is conducted through the heat conducting plate (31), but is conducted along the length of the heat conducting plate (31) and then discharged to the heat dissipation portion (50), so that the heating temperature of the battery cell mounted inside the battery pack (3) can be maintained uniformly.

[0113] Meanwhile, the battery pack temperature control system (1) according to the first embodiment of the present invention can prevent condensation within the battery pack (3).

[0114] Referring to Fig. 6, the temperature of a plurality of battery cells mounted in a battery pack (3) is measured.

[0115] For this purpose, a measurement sensor (not shown) capable of measuring temperature and humidity may be installed inside the battery pack (3).

[0116] Accordingly, the control unit receives temperature data within the battery pack (3) in real time from the measurement sensor and determines whether the received temperature data is included in a preset temperature range.

[0117] Here, if the measured temperature data exceeds the preset temperature range, the relative humidity inside the battery pack (3) is measured.

[0118] The control unit calculates the relative humidity measured within the battery pack (3) as the dew point temperature.

[0119] At this time, the relative humidity measured in the battery pack (3) is calculated as the dew point temperature using the Magnus formula.

[0120] Dew point temperature (℃) = [b×{a×T÷(b+T)+InRH}]÷[a-{a×T÷(b+T)+InRH}]

[0121] am.

[0122] At this time,

[0123] a : 6.1121,

[0124] b: 18.678,

[0125] c: is the dry bulb temperature,

[0126] RH: Relative humidity.

[0127] Using the above-mentioned Magnus formula, the relative humidity measured in the battery pack (3) is calculated as the dew point temperature, and then the target temperature is set from the dew point temperature.

[0128] Target temperature (℃) = Battery cell temperature (℃) - Dew point temperature (℃)

[0129] In this way, after setting the target temperature, the voltage to be applied to the thermoelectric element (35) is set to correspond to the set target temperature.

[0130] At this time, the voltage to be applied to the thermoelectric element (35) can be set through a table for setting the applied voltage according to the target temperature.

[0131] Accordingly, a voltage is applied to the thermoelectric element (35) to correspond to the target temperature, and the plate (10) in surface contact with the lower side of the battery pack (3) is cooled by the voltage applied to the thermoelectric element (35), thereby cooling the battery pack (3).

[0132] Through this, condensation within the battery pack (3) can be prevented in real time.

[0133]

[0134] (Second embodiment)

[0135] Fig. 7 is a drawing showing a battery pack temperature control system according to a second embodiment of the present invention. Fig. 8 is a drawing showing the lower side of the battery pack temperature control system according to a second embodiment of the present invention. Fig. 9 is a drawing showing the lower structure of the battery pack temperature control system according to a second embodiment of the present invention. Fig. 10 is a drawing showing an enlarged portion of a temperature control unit of the battery pack temperature control system according to a second embodiment of the present invention.

[0136] Since the battery pack temperature control system according to the second embodiment of the present invention has the same structure as the battery pack temperature control system according to the first embodiment described above, except for the heat dissipation unit, a duplicate description of the same configuration will be omitted.

[0137] Referring to FIGS. 7 to 10, the heat dissipation unit (50) of the battery pack temperature control system (1) according to the second embodiment of the present invention may include a plurality of cooler units (51) spaced apart at a predetermined interval in the width direction at one end of the plate (10) and arranged to correspond to the heat conduction plate (31), and an exhaust unit (55) that collects and exhausts high-temperature air or low-temperature air discharged from each cooler unit (51).

[0138] The above cooler section (51) can suck in high temperature air or low temperature air generated by heat or cold air conducted through the heat conducting plate (31) and then discharge it through the discharge section (55).

[0139] To this end, the cooler section (51) may include a suction section (52) formed on one side facing the heat conducting plate (31) and a cooler (53) for discharging high-temperature air or low-temperature air sucked through the suction section (52) upward.

[0140] Here, the cooler section (51) has a general configuration, so a detailed description thereof will be omitted below.

[0141] The above discharge unit (55) is intended to collect and discharge high-temperature air or low-temperature air discharged upward through multiple coolers (53), and may be in the form of a rectangular housing with a hollow space (55a) formed inside.

[0142] Here, the lower side of the discharge section (55) can be connected to each cooler section (51).

[0143] In addition, the discharge unit (55) may be formed with a discharge port (55b) on one side and / or the other side to discharge high temperature air or low temperature air that is discharged and introduced through each cooler unit (51).

[0144] Accordingly, the high temperature air or low temperature air discharged through each cooler section (51) flows into the hollow section (55a) of the discharge section (55), and the high temperature air or low temperature air that flows into the hollow section (55a) of the discharge port (55b) can be discharged through the discharge port (55b) formed on one side or the other side of the discharge port (55b).

[0145] At this time, the control unit can drive the heat dissipation unit (50) to release high temperature air or low temperature air by driving the temperature control unit (30).

[0146] To this end, the control unit can suck in heat or cold generated in the thermoelectric element (35) and conducted to the heat conducting plate (31) through the suction unit (52) of the heat dissipation unit (50).

[0147] The control unit can drive the cooler (53) to discharge high temperature air or low temperature air sucked in through the suction unit (52).

[0148] Here, the temperature control unit (30) may be equipped with a temperature sensor (not shown), and the temperature sensor may be connected to the control unit.

[0149] Accordingly, the temperature during cooling or heating through the temperature control unit (30), the temperature of the temperature control unit (30) when high-temperature air or low-temperature air is discharged through the heat release unit (50), etc. can be transmitted to the control unit, and the control unit can control the temperature of the temperature control unit (30) through the temperature data.

[0150] Meanwhile, the battery pack temperature control system (1) according to the present embodiment can prevent deformation and twisting of the plate (10) by forming a reinforcing piece having a certain length on both sides of the upper surface of the plate (10) in a protruding manner.

[0151] Therefore, in the battery pack temperature control system (1) according to the present embodiment, a separate connection frame (10a) for connecting the plate (10) and the temperature control unit (30) can be deleted.

[0152] In addition, in this embodiment, the fixing member (15') is formed in a "┌┐" shape, so that deformation and twisting of the plate (10) and the connecting frame (10a) on which the battery pack (3) is installed can be prevented.

[0153] Hereinafter, the heat release process in the operation process of the battery pack temperature control system according to the second embodiment of the present invention will be briefly described.

[0154] When the thermoelectric element (35) for cooling the battery pack (3) operates, heat is generated through the second surface (35b) which is the heating surface opposite the first surface (35a) which is the cooling surface of the thermoelectric element (35), and the generated heat is conducted through the heat conducting plate (31).

[0155] At this time, the heat generated from the heating surface (35b) of the plurality of thermoelectric elements (35) is conducted along the length direction of the heat conduction plate (31), is sucked into the cooler part (51) of the heat dissipation part (50) formed at one end of the heat conduction plate (31), and then discharged to the discharge part (55).

[0156] That is, the heat conducted through the heat conducting plate (31) is sucked in through the suction portion (52) formed on the side and then discharged to the upper part of the cooler (53) by the rotational drive of the cooler (53), and the heat discharged through the cooler (53) is captured in the hollow portion (55a) of the discharge portion (55).

[0157] In this way, the captured heat is discharged through the discharge port (55b) formed on one side of the discharge unit (55).

[0158] Here, the heat generated from the thermoelectric element (35) is conducted through the heat conducting plate (31), and is then conducted along the length of the heat conducting plate (31) and then discharged to the heat dissipation portion (50), thereby uniformly maintaining the temperature of the battery cells mounted inside the battery pack (3).

[0159] In this embodiment, the process of releasing heat generated when cooling a battery pack is described as an example, but the process of releasing cold air generated when heating a battery pack can also be discharged through the above process, and is not limited thereto.

[0160] (Embodiment 3)

[0161] Fig. 11 is an enlarged drawing showing a heat conduction plate of a battery pack temperature control system according to a third embodiment of the present invention.

[0162] The battery pack temperature control system according to the third embodiment of the present invention has the same structure as the battery pack temperature control system according to the first embodiment described above, except for the heat conducting plate, so a duplicate description of the same configuration will be omitted.

[0163] Referring to FIGS. 1 to 6 and 11, the thermal conductive plate (31') of the battery pack temperature control system (1) according to the third embodiment of the present invention may include a plurality of installation portions (32) formed at regular intervals in the longitudinal direction so that thermoelectric elements (35) are installed, and a heat movement path (33) formed between each of the installation portions (32) to move high-temperature air or low-temperature air generated from the thermoelectric elements (35).

[0164] Specifically, the thermal movement path (33) may be formed with an engraved pattern on the edge centered on the installation part (32). That is, a thermal movement path (33) with an engraved pattern may be formed on the edge of a thermoelectric element (35) installed in the installation part (32).

[0165] In this way, by forming a heat movement path (33) with an engraved pattern at the edge centered on each installation part (32) where a thermoelectric element (35) is installed, it is possible to improve the balance of heat or cold dissipated from a plurality of thermoelectric elements (35) and the uniformity of the cooling level or heating level of each battery cell in the battery pack (3).

[0166] Here, the above-mentioned intaglio pattern may be a radial intaglio pattern.

[0167] In this embodiment, the heat transfer path (33) is formed in a radial engraved pattern centered on the installation part (32) where the thermoelectric element (35) is installed, thereby improving the uniformity of the cooling level or heating level. However, the shape and form of the heat transfer path (33) are not limited thereto and can be changed in various ways as long as the uniformity of the cooling level or heating level can be improved.

[0168] Therefore, by forming a heat transfer path (33) of an engraved pattern on the heat conduction plate (31'), the temperature uniformity of cooling or heating can be improved compared to the case of a flat heat conduction plate (31).

[0169] In this way, by forming a heat transfer path (33) on the heat conducting plate (31'), the heat generated from the thermoelectric element (35) is quickly conducted along the heat transfer path (33) formed between each installation part (32), thereby uniformly maintaining the cooling temperature or heating temperature of the battery cell mounted inside the battery pack (3).

[0170] While the present invention has been illustrated and described with reference to specific embodiments thereof, it will be readily apparent to those skilled in the art that various modifications and variations may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.

[0171] [Explanation of symbols]

[0172] 1: Battery pack temperature control system

[0173] 3: Battery pack

[0174] 10: Plate

[0175] 10a: Connection frame

[0176] 11, 11': Reinforcement

[0177] 13: Cover body

[0178] 15, 15': Fixed member

[0179] 30: Temperature control unit

[0180] 31, 31': Heat conducting plate

[0181] 32: Installation section

[0182] 33: Heat transfer path

[0183] 35: Thermoelectric element

[0184] 35a: Page 1

[0185] 35b: Second side

[0186] 50: Heat dissipation part

[0187] 50a: heat dissipation part

[0188] 51: Cooler section

[0189] 52: Suction part

[0190] 53: Cooler

[0191] 55: Exhaust

[0192] 55a: Hollow

[0193] 55b: exhaust port

Claims

1. A plate on which a battery pack including a plurality of battery cells is mounted on the upper side; A temperature control unit provided on the lower side of the above plate to cool and heat the battery pack; A heat dissipation unit provided on one side of the above plate to dissipate heat generated from the battery pack; and A control unit capable of controlling at least one of the temperature control unit and the heat dissipation unit; A battery pack temperature control system comprising:

2. In claim 1, The above plate is formed as a plate body, and further includes a connecting frame interposed between the plate and the temperature control unit, A battery pack temperature control system characterized in that a reinforcing piece having a constant length in the width direction is protruded on both sides of the longitudinal direction of the above-mentioned connecting frame.

3. In claim 1, A battery pack temperature control system, characterized in that the temperature control unit includes at least one heat-conducting plate provided on the lower side of the plate, and at least one thermoelectric element provided on the heat-conducting plate.

4. In claim 3, A battery pack temperature control system, characterized in that the heat-conducting plate can be spaced apart in a second axis direction intersecting the first axis direction with respect to an imaginary first axis direction crossing the plate.

5. In claim 3, A battery pack temperature control system, characterized in that the thermoelectric element is a Peltier element capable of cooling and heating a plate.

6. In claim 5, A battery pack temperature control system, characterized in that the thermoelectric element has a first surface disposed on the lower side of the plate to cool or heat the plate, and a second surface disposed on the upper side of the heat-conducting plate, and when the plate is cooled or heated through the first surface, heat or cold generated on the second surface is conducted and released through the heat-conducting plate.

7. In claim 4, A battery pack temperature control system characterized in that the above heat-conducting plate includes a plurality of installation parts formed at regular intervals in the longitudinal direction of the upper side so that a thermoelectric element is installed, and a heat movement path formed between each of the installation parts to move heat generated from the heat-conducting plate.

8. In claim 7, A battery pack temperature control system characterized in that the above heat transfer path is formed as a pattern of engraved patterns on the edge centered on the installation part.

9. In claim 3, A battery pack temperature control system characterized in that a cover body is provided on the lower side of the above plate to surround the temperature control unit so as to fix the temperature control unit to the plate.

10. In claim 3, A battery pack temperature control system, characterized in that the heat dissipation unit includes a heat dissipation unit including at least one heat dissipation fin arranged on the upper surface of one end of each heat conduction plate in a form perpendicular to each heat conduction plate, and an exhaust unit that captures and exhausts high-temperature air or low-temperature air discharged from the heat dissipation unit.

Images