KR102629222B1 - Battery cycler minimizing interference between channel modules - Google Patents

Abstract

The present invention not only minimizes radiation and conductive interference caused by EMI between adjacent channel modules in order to accurately measure the voltage and current of a battery cell, but also provides a channel This relates to a battery cycler that minimizes interference between channel modules, allowing module replacement or easy maintenance.

Description

Battery cycler minimizing interference between channel modules}

The present invention relates to a battery cycler, and more specifically, to a battery cycler that minimizes interference between removable channel modules for charging and discharging battery cells.

Secondary batteries were initially mainly used in portable mobile devices such as laptop computers and mobile phones, but recently, the development of medium to large-sized battery cells for electric vehicles and energy storage systems (ESS) has been actively conducted.

The production process of battery cells, which are secondary batteries, can be largely divided into an electrode process, an assembly process, and an activation process. In particular, the activation process includes a formation process that gives the battery its role as a secondary battery through charging and discharging the battery cell using formation equipment; , It can be further divided into a test process that evaluates the performance and lifespan of the battery cell using test equipment (cycler).

Unlike formation equipment that only performs charging and discharging with small currents, battery cyclers perform overload testing and charging and discharging with large currents to accurately evaluate the performance and lifespan of battery cells, as well as performing charging and discharging during testing and charging. It must be possible to accurately measure the voltage and current of battery cells.

Therefore, the battery cycler requires a structure that can effectively dissipate heat generated from the switch element when charging and discharging with a large current.

In addition, the battery cycler must be able to replace the channel module or easily perform maintenance in response to a failure of the channel module that performs charging and discharging of the battery cell.

Additionally, the battery cycler is preferably structured to accurately measure the voltage and current of the battery cell during high-current testing or charging/discharging.

In addition, the battery cycler requires a structure that can minimize radiation and conductive interference caused by electro-magnetic interference (EMI) between adjacent channel modules in order to accurately measure the voltage and current of the battery cell.

Public Patent Publication No. 2022-0086082

Therefore, the present invention was made to solve the problems of the prior art, and provides a battery cycler that can replace the channel module or easily perform maintenance in response to a failure of the channel module that performs charging and discharging of the battery cell. That's the purpose.

Additionally, the purpose of the present invention is to provide a battery cycler that can minimize radiation and conductive interference due to EMI between adjacent channel modules for accurate measurement of voltage and current of battery cells.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

In order to achieve the above object, the battery cycler according to the present invention is a battery cycler that performs charging and discharging of the battery cell to evaluate the performance and life of the battery cell, and is arranged in parallel with each other for each channel. It is configured to include one or more tray modules to which a plurality of channel modules that perform charging and discharging of battery cells are detachably coupled, wherein the tray module is provided with an internal space for accommodating the plurality of channel modules, and the channel module A tray body configured to be open on one side to allow entry and exit in the longitudinal direction; and a backplane board disposed on the other side of the tray body to which the plurality of channel modules are detachably coupled, each of the plurality of channel modules having a main main board removably coupled to the backplane board on one side in the longitudinal direction. Channel board with connectors; A plurality of switch elements arranged at a predetermined distance apart in parallel at the bottom of the channel board and whose switching operation is controlled according to a driving signal from the channel board for charging and discharging the battery cells, and a row of the switch elements a heat dissipation module including a heat dissipation plate coupled to a heat dissipation surface of the switch element to dissipate heat; and a conductive base panel disposed adjacent to the heat sink so that the heat dissipation module is positioned between the channel board, wherein the base panel is arranged parallel to the channel board by a support means, It is electrically insulated from the channel board and electrically connected to the chassis ground of the battery cycler to block switching EMI (Electro-Magnetic Interference) radiated from the heat dissipation module from propagating to adjacent channel modules.

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The base panel may be spaced apart from the heat sink by a predetermined distance so that cooling air generated by a cooling fan flows between the heat sink and the base panel.

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The battery cycler according to the present invention further includes a sub-board disposed on an upper part of the channel board and detachably coupled to the channel board, wherein the sub-board includes an MCU that controls charging and discharging operations of the channel module. It is characterized by including a (Micro-Controller Unit) and a sensing circuit that senses the voltage and charge/discharge current of the battery cell.

In the battery cycler according to the present invention, a plurality of guide parts for guiding the channel modules are formed on the bottom surface of the tray body so that the channel modules are coupled to the backplane board by sliding coupling, and the base panel includes the It is characterized in that it is electrically connected to the chassis ground through a guide part.

The battery cycler according to the present invention has the effect of being able to replace the channel module or easily perform maintenance in response to a failure of the channel module that performs charging and discharging of the battery cell.

Additionally, the present invention has the effect of minimizing radiation and conductive interference caused by EMI between adjacent channel modules for accurate measurement of voltage and current of battery cells.

1 is a perspective view of a battery cycler according to the present invention.
Figure 2 is an internal perspective view with the rear of the battery cycler according to the present invention opened.
Figure 3 is a block diagram of a battery cycler according to the present invention.
Figure 4 is an exploded view of the tray module.
Figure 5 is a side view showing the combination of a channel module, backplane board, and AC/DC converter.
Figure 6 is a block diagram of a channel module according to the present invention.
Figure 7 is a perspective view and exploded view of the channel module.
Figure 8 is an exploded view showing the coupling relationship between the channel board and the heat dissipation module.
Figure 9 is a side view of the channel module.
Figure 10 is a diagram showing a state in which a plurality of channel modules are arranged.
Figure 11 is an exploded view of a heat dissipation module according to the present invention.

A preferred embodiment of the present invention will be described in detail with the accompanying drawings as follows. The detailed description below is merely illustrative and merely illustrates preferred embodiments of the present invention.

Figure 1 is a perspective view of a battery cycler according to the present invention, and Figure 2 is an internal perspective view with the rear of the battery cycler opened.

Referring to Figures 1 and 2, the battery cycler according to the present invention is a device that performs charging and discharging of battery cells to evaluate the performance and lifespan of the battery cells, and is arranged in parallel with each other to charge and discharge the battery cells for each channel. A plurality of channel modules 100 that perform may be configured to include one or more tray modules 200 that are detachably coupled.

As shown in FIG. 1, switches for controlling operation are placed on the front of the battery cycler, and a display device to display the operating status may be further provided as needed.

The channel module 100 is a component that performs charging and discharging of battery cells for each channel, and is loaded on the tray module 200 in parallel with each other, and is characterized in that it is detachably coupled to the tray module 200. . Through this, when the channel module 100 breaks down, inspection, repair, and replacement of the channel module 100 can be easily performed.

As shown in FIG. 2 , the channel module 100 may be electrically connected to a battery cell and may be formed with terminals (not shown) for flowing charge/discharge current. These terminals have a structure capable of conducting large currents and may be provided in the form of a bus bar.

The channel module 100 may be formed with one or more channels for charging and discharging battery cells, but each channel is configured to prevent waste of normal channels when the channel module 100 is replaced due to a failure of a specific channel. It is desirable to configure it to take charge of one or two channels depending on the charge/discharge current capacity.

Figure 3 is a block diagram of a battery cycler according to the present invention.

Referring to FIG. 3, the battery cycler according to the present invention is one or more tray modules in which a plurality of channel modules 100 that are arranged in parallel and perform charging and discharging of battery cells 500 for each channel are detachably coupled to each other. It may be configured to include (200).

Each of the tray modules 200 includes a plurality of AC/DC converters 400 that convert alternating current into direct current so that the direct current output side is electrically connected to the channel module 100, and mutually convert the input side direct current and output side direct current into a battery. It may be configured to include a plurality of channel modules 100 that perform charging and discharging of the cell 500, and a backplane board 300 that electrically connects the plurality of AC/DC converters 400 and the channel module 100. there is.

The AC/DC converter 400 is a component that converts single-phase or three-phase alternating current into direct current. The direct current output side is electrically connected to the channel module 100, and provides charging power so that it can be applied to both charging and discharging modes. This may be a bidirectional structure in which discharge power can be transferred from the alternating current side to direct current, or the discharge power can be transferred from the direct current side to the alternating current side.

Additionally, the AC/DC converter 400 may be composed of a plurality of AC/DC converters, each corresponding to the channel module 100.

Looking at the failure frequency of the components of the battery cycler, the failure frequency of the channel module 100, which is directly connected to the battery cell 500 and performs charging and discharging, is the highest, followed by the failure of the AC/DC converter 400. Frequency comes next.

Therefore, in the battery cycler according to the present invention, the channel modules 100 are configured to be removable to increase the convenience of maintenance, including replacement in case of failure, while the AC/DC converter 400 also includes each channel module ( By configuring a plurality of units to correspond to 100), only the corresponding AC/DC converter 400 can be replaced in the event of a failure, thereby achieving convenience of replacement and cost reduction.

The channel module 100 may be provided with one or more channel circuits including a power circuit, a switch element, a switching drive circuit, a filter, a control circuit, and a sensing circuit to charge and discharge the battery cell 500 for each channel. You can. If a plurality of channel circuits are configured in one channel module 100, the control circuit may be configured to commonly control the channel circuits for cost reduction, etc.

In this way, the channel module 100 not only includes all the components necessary for charging and discharging to enable independent charging and discharging, but also has a structure that is detachably coupled to the backplane board 300, so that it can be used as a normal module in the event of a failure. It is effective in solving the problem easily by simply replacing it.

The backplane board 300 is an intermediate component for electrically connecting the AC/DC converter 400 and the channel board 110, and is provided with a connector so that the channel board 110 can be detachably coupled, and is configured to connect the AC/DC converter 400 to the channel board 110. A contact point or terminal for connection of the DC converter 400 may be provided. Furthermore, communication means for communicating charge/discharge control or status information of the channel board 110 with the main control unit of the battery cycler may be further provided.

Additionally, the backplane board 300 may be configured to combine a plurality of channel boards 110 and an AC/DC converter 400 into one backplane board 300.

Figure 4 is an exploded view of the tray module 200 to explain the structure of the tray module 200 in more detail. Figure 4(a) shows the channel module 100 separated from the tray main body 210, FIG. 4(b) is a diagram showing the inside of the tray main body 210.

Referring to FIG. 4, the tray module 200 is a tray body having an internal space for accommodating a plurality of channel modules 100 and having one side open to allow the channel modules 100 to enter and exit in the longitudinal direction. 210), a backplane board 300 disposed on the other side of the tray main body 210 and to which a plurality of channel modules 100 are removably coupled, and on the opposite side of the channel module 100 based on the backplane board 300. It is configured to include a plurality of AC/DC converters 400 arranged.

In addition, the tray module 200 is attached to the bottom of the tray main body 210 in response to each channel module 100 to guide the entrance and exit of the channel module 100 when the channel module 100 is combined with the backplane board 300. It may include a plurality of guide parts 220 formed on the inside of the surface and top.

In addition, the tray module 200 may further include a back frame 600 in which a blower 610 is formed as a passage through which cooling wind for heat dissipation flows, and the back frame 600 has a position corresponding to the blower 610. A cooling fan 620 that generates cooling wind is provided and can be used to cool the channel module 100.

The backplane board 300 may include a plurality of backplane connectors 310 for coupling to the channel board 110. There may be one or more backplane connectors 310 for each channel board 110. One or more backplane boards 300 may be provided for each frame module, and may be fixed directly to the tray body 210 or fixed through the back frame 600.

Figure 5 is a side view showing the combination of the channel module 100, the backplane board 300, and the AC/DC converter 400.

Referring to FIG. 5, the channel module 100 and the AC/DC converter 400 may be disposed on opposite sides of each other with the backplane board 300 in between.

The channel module 100, which has a relatively high failure frequency, is detachably coupled to the backplane board 300 through the backplane connector 310, so that the channel module 100 can be easily removed for replacement or repair in an emergency. .

In contrast, the AC/DC converter 400 is electrically connected to the backplane board 300 through the power bus bar 410, and the power bus bar 410 is connected using a fixing means such as bolts or soldering. Therefore, it can be semi-fixedly coupled to the backplane board 300, but since it is configured separately from the surrounding components, replacement or maintenance can be facilitated by removing the fixing means in the event of an emergency such as a breakdown.

Hereinafter, the channel module 100 of the present invention will be described in detail.

Figure 6 is a block diagram of the channel module 100 according to the present invention, and Figure 7 is a perspective view (Figure 7(a)) and an exploded view (Figure 7(b)) of the channel module 100.

Referring to Figures 6 and 7, the channel module 100 of the present invention includes a channel board 110 having a main connector 114 that is removably coupled to the backplane board 300 on one side in the longitudinal direction, and , a plurality of switch elements arranged in parallel and spaced apart by a predetermined distance at the bottom of the channel board 110, and whose switching operation is controlled according to a driving signal from the channel board 110 for charging and discharging the battery cell 500 ( 132), and a heat dissipation module 130 including a heat dissipation plate 133 configured to radiate heat from the switch element 132 by thermally coupling to the heat dissipation surface of the switch element 132, and an upper portion of the channel board 110. It is characterized in that it includes a sub board 120 that is disposed in and detachably coupled to the channel board 110.

In addition to the main connector 114, the channel board 110 includes a DC power supply unit 113 that generates DC power to be used in the channel module 100, and a switching operation of the switch element 132 to perform charging and discharging. A switch driving unit 112 that generates a driving signal for the switch, a filter unit 111 for filtering the switching voltage and current generated by the switching operation of the switch element 132, and a sub board 120 are connected to the channel board 110. ) may further include a sub-connector 115 for detachable coupling.

The sub-connector 115 is arranged parallel to the direction in which the cooling wind from the cooling fan 620 flows, as shown in FIG. 7(b), and the cooling wind flows between the channel board 110 and the sub-board 120. The sub board 120 may be placed on the channel board 110 at a height sufficient to space the sub board 120 from the channel board 110 by a predetermined distance.

The heat dissipation module 130 is a component that is physically separated from the channel board 110, and may preferably be arranged in parallel and spaced apart by a predetermined distance at the lower part of the channel board 110. Through this configuration, cooling wind generated by the cooling fan 620 flows between the heat dissipation module 130 and the channel board 110, thereby increasing heat dissipation efficiency.

In this way, when the heat dissipation module 130 is separated from the channel board 110, the effect on the circuits of the channel board 110 and the sub board 120 due to the heat generated by the switch element 132 can be minimized. There is. In particular, the sensing circuit that senses the voltage and current of the battery cell 500 may have errors in the sensing value due to changes in temperature, but by separating the heat dissipation module 130, the accuracy of the voltage and current measurement values can be improved. There is an effect that can be improved.

However, since there is a risk that switching noise may increase as the wiring becomes longer due to separation of the heat dissipation module 130, the heat dissipation module 130 is capable of bypassing the switching noise of the power line connected to the switch element 132. It may be configured to further include a plurality of bypass capacitors 131. This has the effect of reducing the size of switching noise generated by the switch element 132 or radiation to the surroundings.

According to FIG. 6, the sub board 120 is a component detachably coupled to the upper part of the channel board 110 and is an MCU (Micro-Controller Unit, 121) that controls the charging and discharging operation of the channel module 100. and a sensing unit 122 that senses the voltage and charge/discharge current of the battery cell 500.

In particular, by separating the sensing unit 122 from the channel board 110, the wiring to the sensing point that senses voltage and current becomes more integrated and simpler compared to the case where it is not separated from the channel board 110, and the channel Since the reference potential that serves as the standard for the board sensing circuit can be configured as one point, the accuracy of the sensed voltage and current is improved.

In addition, the sub board 120 consisting of the MCU 121 and the sensing unit 122 has a relatively lower failure probability than the channel board 110 and the heat dissipation module 130, so it must be replaced separately when replacing the channel module 100. It has the advantage of being able to be separated and reused.

Additionally, by placing the sub board 120 on the opposite side of the heat dissipation module 130 based on the channel board 110, the influence of heat and switching noise generated from the heat dissipation module 130 can be minimized.

Referring to FIG. 7 , the channel module 100 may have a structure in which a sub board 120 and a heat dissipation module 130 are arranged above and below the channel board 110 with the channel board 110 as the center.

In addition, the channel module 100 includes a conductor (e.g., bus bar, not shown) electrically connected to the filter unit 111 and configured to provide charge/discharge voltage and current to the battery cell 500, and an overcurrent or It may further include overcurrent blocking means 150 that operates to block short-circuit current when it occurs. Here, the overcurrent blocking means 150 may be a fuse.

In addition, the channel module 100 includes a base panel 140 disposed adjacent to the heat sink 133 on the opposite side of the channel board 110 so that the heat dissipation module 130 is positioned between the channel board 110 and the channel board 110. ) may further be included.

The base panel 140 may be fixed to the channel board 110 by the support means 141 so as to be spaced apart from the heat sink 133 by a predetermined distance, and this spacing between the base panel 140 and the heat sink 133 Heat dissipation efficiency can be improved by allowing the cooling wind generated by the cooling fan 620 to flow between the heat sink 133 and the base panel 140 due to the space.

Additionally, the base panel 140 may be made of a conductive material, that is, a metallic plate, so that switching EMI (Electro-Magnetic Interference) radiated from the heat sink 133 is blocked without propagating to adjacent channels. In this case, if the base panel 140 is placed at a predetermined distance from the heat sink 133, the capacitance between the heat sink 133 and the base panel 140 becomes small, thereby minimizing leakage of switching EMI due to capacitance. You can.

Figure 8 is an exploded view showing the coupling relationship between the channel board 110 and the heat dissipation module 130.

Referring to FIG. 8, when the heat dissipation module 130 is coupled to the lower part of the channel board 110, it may be configured to be detachably coupled by the large current connection portion 116 and the small signal connection portion 117.

The large current connection part 116 is connected to the conductor (e.g., bus bar) of the heat dissipation module 130 through which a large current flows by fixing means such as bolts or soldering, and the small signal connection part 117 is connected to the corresponding conductor (e.g., bus bar). The small signal terminal of the heat dissipation module 130 can be configured in the form of a male and female connector so that it is removable.

In particular, the high current connection portion 116 may be in a form that protrudes so that the heat dissipation module 130 is spaced apart from the channel module 100 by the predetermined distance, as shown in FIG. 8 . Additionally, it may have a structure that is open and protrudes in the direction of the cooling wind flow so as not to impede the flow of the cooling wind.

The heat dissipation module 130 is a component that generates a lot of heat while multiple switching elements switch high charge/discharge currents to charge and discharge the battery cell, so the frequency of failure is bound to be high. Therefore, replacement and repair can be facilitated by making it detachable from the channel board 110 as described above.

Figure 9 is a side view of the channel module 100 to explain the stacked structure and heat dissipation effect of the channel module 100.

Referring to FIG. 9, the channel module 100 of the present invention includes a channel board 110 having a main connector 114 that is detachably coupled to the backplane board 300 on one side in the longitudinal direction, and a channel board A plurality of switch elements 132 arranged in parallel and spaced apart by a predetermined distance at the bottom of 110, the switching operation of which is controlled according to a driving signal from the channel board 110 for charging and discharging of the battery cell 500; A heat dissipation module 130 including a heat dissipation plate 133 configured to thermally couple to the heat dissipation surface of the switch element 132 to dissipate heat from the switch element 132, and disposed on the upper part of the channel board 110 and forming a channel It is characterized by including a sub board 120 that is detachably coupled to the sub connector 115 on the board 110.

In particular, the heat dissipation module 130 is arranged to be spaced apart from the channel board 110 by a predetermined distance by the large current connection part 116 and the small signal connection part 117, and is spaced apart from the base panel 140 by a predetermined distance. (140) may be fixed to the channel board (110) by a plurality of support means (141).

In addition, so that the fluidity of the cooling wind is not reduced, the sub connector 115 to which the sub board 120 is coupled and the small signal connector connecting the heat dissipation module 130 and the channel board 110 are long along the flow direction of the cooling wind. The high current connection portion 116 may have a structure that is open and protrudes in the direction of cooling wind flow.

Due to this structure, the cooling wind incident on the channel module 100 is not only guided by the channel board 110 and the base panel 140 as shown in FIG. 9, but is also guided through the cooling module and the channel board without receiving any particular resistance. Since it can pass between 110 and the sub board 120, heat can be effectively dissipated from various electronic components constituting the channel module 100.

FIG. 10 is a diagram showing a state in which a plurality of channel modules 100 are arranged on the tray main body 210.

According to FIG. 10, the channel module 100 includes a base panel 140 arranged parallel to the channel board 110 by a support means 141, and the base panel 140 is attached to the channel board 110. Characterized by being electrically isolated and electrically connected to the chassis ground of the battery cycler.

The heat dissipation module 130 installed at the lower part of the channel module 100 is thermally coupled to a plurality of switch elements 132 that perform a switching operation with a large current and the heat dissipation surface of the switch elements 132, thereby forming the switch element 132. As a configuration including a heat sink 133 responsible for dissipating heat, the heat sink 133 is connected to the switch element ( It acts like an antenna that radiates switching EMI with a waveform similar to the switching voltage of 132).

If a plurality of channel modules 100 are coupled to the backplane board 300 in parallel with each other so that the sub boards 120 face the same direction as shown in FIG. 10, the heat dissipation of any one channel module 100 Since the module 130 faces closely the sub board 120 of another adjacent channel module 100, the switching EMI radiated from the heat dissipation module 130 of one channel module 100 is transmitted from the adjacent channel module 100. This may affect the sensing unit 122 configured on the sub board 120, causing a problem in which the accuracy of the charge/discharge voltage and current of the battery cell 500 sensed by the sensing unit 122 is reduced.

Corresponding to this, the channel module 100 of the present invention is configured to include a base panel 140 disposed in parallel with the channel board 110, causing electro-magnetic interference (EMI) radiated from the heat dissipation module 130. ) can be configured to fall toward the chassis ground 710 instead of propagating to the adjacent channel module 100.

To this end, the base panel 140 is made of a conductive material, that is, a metallic plate, but is electrically insulated from the channel board 110 and electrically connected to the chassis ground 710 of the battery cycler.

If the base panel 140 is not electrically insulated from the channel board 110 and is connected to, for example, the power ground 720 or signal ground of the power source within the channel board 110, the radiated energy from the heat dissipation module 130 Switching EMI components may travel through the base panel 140 and disturb the power ground 720 or signal ground of the channel board 110, causing errors in circuit operation or sensing values.

However, since the base panel 140 of the present invention is directly connected to the chassis ground 710 instead of being electrically isolated from the channel board 110, switching EMI is transmitted to the chassis without affecting the circuitry of the channel board 110. It can be bypassed to ground 710.

Furthermore, if the base panel 140 is placed at a predetermined distance apart from the heat sink 133 instead of being in close contact with the heat sink 133, the capacitance between the heat sink 133 and the base panel 140 becomes small, so that the switching EMI is reduced by the capacitor. Leakage to the outside of the panel 140 can be minimized.

The method of connecting the base panel 140 to the chassis ground 710 is that when the channel module 100 is guided by the guide part 220 and attached to and detached from the backplane board 300, the base panel 140 is guided by the guide part 220. It may be slidingly coupled to 220 and electrically connected to the chassis ground 710 through this. Alternatively or additionally, it is also possible to electrically connect the base panel 140 to the chassis ground 710 point of the battery cycler enclosure using a separate electrical lead or conductor.

When placing a plurality of channel modules 100 on the tray main body 210, the plurality of channel modules 100 are parallel to each other with the sub boards 120 facing the same direction as the backplane board 300, as shown in FIG. 10. ) can be combined.

Alternatively, when placing a plurality of channel modules 100 on the tray main body 210, the plurality of channel modules 100 are configured so that the sub boards 120 of adjacent channel modules 100 each face different directions. They can be coupled to the backplane board 300 in parallel with each other. In this configuration, the heat dissipation modules 130 corresponding to the source of switching EMI between adjacent channel modules 100 face each other, or the sub boards 120 vulnerable to noise face each other, so that the sub boards 120 are separated from the adjacent heat dissipation modules 130. ) can be reduced from being affected by switching EMI.

In this case, the battery cycler of the present invention may be configured to further include an additional base panel 140 disposed between adjacent sub boards 120. By using the additional base panel 140, the switching EMI of each channel module 100 can be bypassed to the chassis ground 710 without affecting the sub boards 120 facing each other.

In addition, in the base panel 140 of the present invention, not only the above-described switching EMI but also the heat generated from the heat dissipation module 130 affects the adjacent channel module 100, especially the sub board 120 of the adjacent channel module 100. It can perform the function of blocking the giving of . To this end, the base panel 140 may be configured to further include an insulating film formed by coating at least one side with an insulating paint or attaching an insulating film.

Figure 11 is an exploded view to explain an embodiment of the stacked structure of the heat dissipation module 130 according to the present invention.

Referring to FIG. 11, the heat dissipation module 130 according to the present invention is a metal PCB (Printed Circuit Board) (134) composed of a circuit layer on which a plurality of conductive patterns 137 are formed, an insulating layer, and a metal substrate sequentially stacked. ), and a plurality of output terminals are arranged so that the heat dissipation surface is in surface contact with the circuit layer of the metal PCB 134 and the switching current flows through the conductive pattern 137 of the metal PCB 134, and the switching operation is controlled by a driving signal. A heat sink 133 configured to dissipate heat from the switch element 132 by thermally contacting the switch element 132 with the surface opposite to the surface on which the circuit layer is formed, that is, the metal substrate side, and the conductive pattern 137. It is characterized in that it includes a plurality of high-current bus bars 135 that are disposed and in electrical contact.

Here, the metal PCB 134 may be an aluminum PCB in which the metal substrate contains aluminum, or it may be a double-sided metal PCB 134 in which an insulating layer and a circuit layer are laminated on both sides around the metal substrate. , the heat sink 133 is preferably disposed on the opposite side of the side where the switch element 132 and the high-current bus bar 135 are disposed.

The switch element 132 is a semiconductor switch whose switching is electronically controlled at high speed, for example, an element selected from BJT (Bipolar Junction Transistor), MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), and IGBT (Insulated Gate Bipolar Transistor). It can be.

Heat generated as a switching current flows through the switch element 132 may be dissipated through the heat dissipation surface of the switch element 132. The heat dissipation surface may be a surface electrically connected to or insulated from the collector or drain of the switch element 132. In order to dissipate heat of the switch element 132, the heat dissipating surface may be configured to thermally contact the circuit layer, and may preferably be configured to be strongly thermally coupled by soldering. Through this configuration, low thermal resistance is formed between the switch element 132 and the metal substrate of the metal PCB 134, allowing effective heat dissipation.

In the circuit layer of the metal PCB 134, when the switch element 132 switches, the collector and emitter terminals (BJT, IGBT) or drain and source terminals (MOSFET) of the switch element 132 are electrically connected to generate a switching current. A plurality of flowing conductive patterns 137 are formed.

In addition, in the circuit layer of the metal PCB 134, a driving signal that controls the switching operation of the switch element 132 is transmitted to the control terminal (e.g., the gate terminal of the MOSFET and IGBT or the base terminal of the BJT) of the switch element 132. If possible, another plurality of conductive patterns electrically connected to the control terminal may be formed.

A large number of high-current bus bars 135 are arranged to electrically contact the plurality of conductive patterns 137 of the metal PCB 134 through which a large switching current flows, and one end of the high-current bus bar 135 is a channel board ( A switching current path can be formed by electrically/mechanically coupled to the high current connection portion 116 of 110).

In addition, the metal PCB 134 includes a plurality of small signal terminal units 138 that are electrically coupled to the small signal connection unit 117 of the channel board 110 to exchange driving signals or other signals for the switch element 132. It may be provided to protrude onto the PCB 134.

According to FIG. 11, the heat sink 133, the metal PCB 134, and the high-current bus bar 135 can be firmly coupled electrically, thermally, and mechanically by the coupling means 139. In particular, the heat sink 133 and the metal PCB 134 are thermally coupled by a coupling means 139 that penetrates the heat sink 133 and the metal PCB 134, and the metal PCB 134 and the high-current bus bar 135 ) can be electrically coupled by the coupling means 139.

Through this configuration, the thermal resistance between the heat sink 133 and the metal PCB 134 is formed to be low, so high heat dissipation efficiency can be expected, and the electrical contact resistance is low between the metal PCB 134 and the high-current bus bar 135. When a large switching current flows, high power efficiency can be expected.

In addition, the heat dissipation module 130 according to the present invention may be configured to further include a plurality of bypass capacitors 131 that bypass switching noise generated by the switching operation of the switch element 132.

At this time, the plurality of bypass capacitors 131 are provided on the metal PCB 134 to electrically connect the collector and emitter terminals (BJT, IGBT) or drain and source terminals (MOSFET) of the switch element 132 through which the switching current flows. It may be connected to the conductive pattern 137 connected to .

In addition, a plurality of bypass capacitors 131 are disposed on a separate capacitor substrate 136 disposed on top of the high-current bus bar 135, as shown in FIG. 11, so that the switching current of the switch element 132 A configuration that is electrically connected to the flowing conductive pattern 137 is also possible.

In this way, by placing the bypass capacitor 131 close to the switch element 132, the switching ripple generated during the operation of the switch element 132 is bypassed to a short path, thereby reducing the propagation of switching noise. .

Through the above-described configuration, the battery cycler according to the present invention can replace the channel module 100 or easily perform maintenance in response to a failure of the channel module 100 that performs charging and discharging of battery cells, In order to accurately measure the voltage and current of a battery cell, there is an effect of minimizing radiation and conductive interference caused by EMI between adjacent channel modules 100.

In the above, the present invention has been described and illustrated based on preferred embodiments for illustrating the principles of the present invention, but the present invention is not limited to the configuration and operation as shown and described. The embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the patent claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100: channel module 110: channel board
111: filter unit 112: switch driving unit
113: DC power supply unit 114: Main connector
115: sub-connector 116: high current connection part
117: Small signal connection part
120: Sub board 121: MCU
122: Sensing unit
130: heat dissipation module 131: bypass capacitor
132: switch element 133: heat sink
134: Metal PCB 135: High current bus bar
136: capacitor substrate 137: conductive pattern
138: small signal terminal 139: coupling means
140: Base panel 141: Support means
150: Overcurrent blocking means
200: Tray module 210: Tray body
220: Guide unit
300: backplane board 310: backplane connector
400: AC/DC converter 410: Power busbar
500: battery cell
600: back frame 610: air vent
620: Cooling fan
710: Chassis ground 720: Power ground

Claims (6)

In the battery cycler that performs charging and discharging of the battery cell to evaluate the performance and lifespan of the battery cell,
It is configured to include one or more tray modules to which a plurality of channel modules that are arranged in parallel and perform charging and discharging of the battery cells for each channel are detachably coupled,
The tray module is,
a tray body provided with an internal space for accommodating the plurality of channel modules and having one side open to allow the channel modules to enter and exit in the longitudinal direction; and
It includes a backplane board disposed on the other side of the tray body to which the plurality of channel modules are removably coupled,
Each of the plurality of channel modules,
a channel board having a main connector on one side in the longitudinal direction that is detachably coupled to the backplane board;
A plurality of switch elements arranged at a predetermined distance apart in parallel at the bottom of the channel board and whose switching operation is controlled according to a driving signal from the channel board for charging and discharging the battery cells, and a row of the switch elements a heat dissipation module including a heat dissipation plate coupled to a heat dissipation surface of the switch element to dissipate heat; and
It is configured to include a conductive base panel disposed adjacent to the heat sink so that the heat dissipation module is positioned between the channel board,
The base panel is arranged parallel to the channel board by a support means, is electrically insulated from the channel board, and is electrically connected to the chassis ground of the battery cycler to prevent electro-magnetic interference (EMI) radiated from the heat dissipation module. A battery cycler that blocks interference from propagating to adjacent channel modules.
delete According to paragraph 1,
The battery cycler is characterized in that the base panel is arranged to be spaced apart from the heat sink by a predetermined distance so that cooling air generated by a cooling fan flows between the heat sink and the base panel.
delete According to paragraph 1,
Further comprising a sub board disposed on an upper portion of the channel board and detachably coupled to the channel board,
The sub-board includes a micro-controller unit (MCU) that controls charging and discharging operations of the channel module, and a sensing circuit that senses the voltage and charging and discharging current of the battery cell.
According to paragraph 1,
A plurality of guide parts are formed on the bottom of the tray body to guide the channel module so that the channel module is coupled to the backplane board by sliding coupling,
A battery cycler, wherein the base panel is electrically connected to the chassis ground through the guide part.