Apparatus for charging and discharging battery having serial-parallel converting switch

Abstract

Technology is disclosed regarding a battery charging and discharging device equipped with a series-parallel switching switch. The battery charging and discharging device equipped with the series-parallel switching switch comprises a first battery module part having a first electrode terminal and a second electrode terminal, respectively, and a second battery module part and a receiving part in which the first battery module part and the second battery module part are received. The receiving part includes a switch part. The switch part electrically connects the first electrode terminal and the second electrode terminal of the first battery module part at a first position to the first electrode terminal and the second electrode terminal of the second battery module part, respectively, and electrically connects the first electrode terminal of the first battery module part to the second electrode terminal of the second battery module part at a second position, and can move its position between the first position and the second position. The technology disclosed in this specification can provide the effect of switching between series and parallel of batteries without requiring a separate complex electrical circuit through a physically operated switch unit. Specifically, the technology disclosed in this specification can provide the effect of switching between series and parallel of batteries simply by rotating the switch unit while a plug is inserted into the first through-hole and the second through-hole provided in the switch unit.

Description

Technology Field

[0001] The technology disclosed in this specification generally relates to a battery charging and discharging device, and more specifically, to a battery charging and discharging device equipped with a series-parallel switching switch capable of switching between series and parallel via a physical switching switch. Background Technology

[0002] Generally, a battery performs its function through a cycle of discharge, which converts chemical energy into electrical energy, and charging, which converts electrical energy into chemical energy and generates electrical energy through a chemical reaction between two metals.

[0003] Due to the recent explosive growth of electric vehicles, the demand for batteries is increasing rapidly, and this demand is expected to rise even further in the future to overcome problems such as resource depletion and environmental destruction caused by fossil fuels.

[0004] Batteries are typically used by connecting individual batteries in series to obtain a desired voltage, and it is common practice to maintain this series connection when charging. Batteries possess internal resistance, and this resistance increases when individual batteries are connected in series. Consequently, there is a problem in that there is a limit to increasing the amount of current applied to the battery when charging at a fixed charging voltage. Therefore, various studies are being conducted to increase the charging current while maintaining the battery's discharge voltage.

[0005] Prior art related to a technology for increasing the charging current while maintaining the discharge voltage of a battery includes Korean Patent Publication No. KR 10-2012-0009694, “Battery Charging & Discharging Device.” Prior art discloses a technology in which, when charging a battery, each of a plurality of batteries is connected in parallel with a power source using an electrically operated switching switch, and when discharging a battery, at least two or more batteries are connected in series. Prior art has the problem that the charging and discharging states of the battery must be monitored separately, and a separate complex electrical circuit, such as a pulse generator, must be provided to switch the switching switch. The problem to be solved

[0006] The technology disclosed in this specification is derived to solve the problems of the aforementioned prior art and provides a technology for a battery charging and discharging device capable of switching between series and parallel connections of batteries through a physically operated switch unit without requiring a separate complex electrical circuit. means of solving the problem

[0007] In one embodiment, technology relating to a battery charging and discharging device equipped with a series-parallel switching switch is disclosed. The battery charging and discharging device equipped with the series-parallel switching switch comprises a first battery module part having a first electrode terminal and a second electrode terminal, respectively, and a second battery module part and a receiving part in which the first battery module part and the second battery module part are accommodated. The receiving part includes a switch part. The switch part electrically connects the first electrode terminal and the second electrode terminal of the first battery module part to the first electrode terminal and the second electrode terminal of the second battery module part, respectively, at a first position, and electrically connects the first electrode terminal of the first battery module part to the second electrode terminal of the second battery module part at a second position, and can move its position between the first position and the second position.

[0008] The first electrode terminal and the second electrode terminal of the first battery module may be provided on one surface of the first battery module. The first electrode terminal and the second electrode terminal of the second battery module may be provided on one surface of the second battery module, and the one surface of the second battery module may face the same direction as the one surface of the first battery module. The switch may be provided on a portion of the receiving portion—hereinafter referred to as the receiving portion cover—opposing the one surface of the first battery module and the one surface of the second battery module. The switch may be rotatably provided on the receiving portion cover. The switch may move between the first position and the second position through rotation.

[0009] One side of the receiving cover may face the one side of the first battery module and the one side of the second battery module. On the one side of the receiving cover, a first wiring section, a second wiring section, a third wiring section, and a fourth wiring section may be provided spaced apart from each other. The first wiring section and the second wiring section may be electrically connected to the first electrode terminal and the second electrode terminal of the first battery module, respectively. The third wiring section and the fourth wiring section may be electrically connected to the first electrode terminal and the second electrode terminal of the second battery module, respectively. By electrically connecting the first wiring section and the second wiring section to the third wiring section and the fourth wiring section, respectively, at the first position, and electrically connecting the first wiring section and the fourth wiring section at the second position, the switch section can electrically connect the first electrode terminal and the second electrode terminal of the first battery module section to the first electrode terminal and the second electrode terminal of the second battery module section, respectively, at the first position, and can electrically connect the first electrode terminal of the first battery module section to the second electrode terminal of the second battery module section at the second position.

[0010] The switch unit may include a fifth wiring unit, a sixth wiring unit, and a seventh wiring unit sequentially spaced apart from each other on one surface of the switch unit facing the one surface of the first battery module unit and the one surface of the second battery module unit. At the first position, the fifth wiring unit may electrically connect the first wiring unit and the third wiring unit. At the first position, the seventh wiring unit may electrically connect the second wiring unit and the fourth wiring unit. At the second position, the sixth wiring unit may electrically connect the first wiring unit and the fourth wiring unit, or electrically connect the second wiring unit and the third wiring unit.

[0011] The switch portion may include a first through-hole and a second through-hole spaced apart from each other, penetrating the other side of the switch portion and the first side of the switch portion. The first through-hole and the second through-hole are provided on the fifth wiring portion and the seventh wiring portion, respectively, so that the fifth wiring portion and the seventh wiring portion may be exposed to the outside through the first through-hole and the second through-hole, respectively. At the second position, the sixth wiring portion may electrically connect the first wiring portion and the fourth wiring portion. At the second position, the fifth wiring portion and the seventh wiring portion may electrically connect the third wiring portion and the second wiring portion, respectively.More specifically, the battery charging and discharging device equipped with the series-parallel switching switch comprises a first battery module part and a second battery module part, each having a first electrode terminal and a second electrode terminal, a receiving part in which the first battery module part and the second battery module part are accommodated, and a switch part provided in the receiving part, wherein the first electrode terminal and the second electrode terminal of the first battery module part are provided on one surface of the first battery module part, and the first electrode terminal and the second electrode terminal of the second battery module part are provided on one surface of the second battery module part, and the one surface of the second battery module part faces the same direction as the one surface of the first battery module part, and the receiving part includes a receiving part cover facing the one surface of the first battery module part and the one surface of the second battery module part, and the switch part is rotatably provided on the receiving part cover and through rotation The switch unit moves between a first position and a second position, and includes a fifth wiring unit, a sixth wiring unit, and a seventh wiring unit that are sequentially spaced apart from each other on one side of the switch unit facing the one side of the first battery module unit and the one side of the second battery module unit, and when the switch unit is located at the first position, the first electrode terminal and the second electrode terminal of the first battery module unit are electrically connected to the first electrode terminal of the second battery module unit and the second electrode terminal of the second battery module unit, respectively, through the fifth wiring unit and the seventh wiring unit, and when the switch unit is located at the second position, the first electrode terminal of the first battery module unit is electrically connected to the second electrode terminal of the second battery module unit through the sixth wiring unit. When the switch unit is located at the first position, the first battery module unit and the second battery module unit are connected in parallel, and when the switch unit is located at the second position, the first battery module unit and the second battery module unit can be connected in series.On one side of the receiving portion cover, a first wiring portion, a second wiring portion, a third wiring portion, and a fourth wiring portion are provided spaced apart from each other, and the first wiring portion and the second wiring portion are each electrically connected to the first electrode terminal and the second electrode terminal of the first battery module portion, and the third wiring portion and the fourth wiring portion are each electrically connected to the first electrode terminal and the second electrode terminal of the second battery module portion, and the switch portion can electrically connect the first wiring portion and the second wiring portion to the third wiring portion and the fourth wiring portion, respectively, at the first position, and electrically connect the first wiring portion and the fourth wiring portion at the second position. The switch unit includes a first through hole and a second through hole spaced apart from each other, penetrating the other side of the switch unit and the first side of the switch unit, and the first through hole and the second through hole are provided on the fifth wiring unit and the seventh wiring unit, respectively, so that the fifth wiring unit and the seventh wiring unit are exposed to the outside through the first through hole and the second through hole, respectively, and the series and parallel can be switched simply by rotating the switch unit while the plug is fastened to the first through hole and the second through hole. Effects of the invention

[0012] The technology disclosed in this specification can provide the effect of switching between series and parallel of batteries without requiring a separate complex electrical circuit through a physically operated switch unit. Specifically, the technology disclosed in this specification can provide the effect of switching between series and parallel of batteries simply by rotating the switch unit while a plug is inserted into the first through-hole and the second through-hole provided in the switch unit.

[0013] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims.

[0014] The foregoing provides only optional concepts in a simplified form regarding matters to be described in more detail later. This content is not intended to limit the main or essential features of the patent claims, or to restrict the scope of the patent claims. Brief explanation of the drawing

[0015] FIG. 1 is a drawing showing a battery charging and discharging device having a series-parallel switching switch disclosed in this specification according to one embodiment. FIG. 2 is a drawing showing the lower part of the cover of the receiving part of a battery charging / discharging device having a series-parallel switching switch disclosed in the present specification according to one embodiment, and the upper part of the first battery module part and the second battery module part received in the receiving part. FIG. 3 is a drawing for explaining the operation of a switch portion of a battery charging and discharging device equipped with a series-parallel switching switch disclosed in this specification according to one embodiment. FIG. 4 is a drawing showing a battery charging and discharging device equipped with a series-parallel switching switch disclosed in this specification according to another embodiment. FIG. 5 is a drawing showing the lower part of the receiving part cover of a battery charging / discharging device having a series-parallel switching switch disclosed in this specification according to another embodiment, and the upper part of the first battery module part and the second battery module part received in the receiving part. FIG. 6 is a drawing for explaining the operation of a switch portion of a battery charging and discharging device equipped with a series-parallel switching switch disclosed in this specification according to another embodiment. Specific details for implementing the invention

[0016] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the drawings. Unless otherwise specified in the text, similar reference numerals in the drawings indicate similar components. The exemplary embodiments described in the detailed description, drawings, and claims are not intended to be limiting, and other embodiments may be used, and other modifications are possible without departing from the spirit or scope of the art disclosed herein. A person skilled in the art will readily understand that the components of this disclosure—namely, those generally described herein and those described in the drawings—can be arranged, configured, combined, or designed in various different configurations, all of which are clearly devised and form part of this disclosure. In the drawings, the width, length, thickness, or shape of components may be exaggerated to clearly represent various layers (or films), regions, and shapes.

[0017] Where one component is referred to as being "provided" to another component, this may include cases where the one component is directly provided to the other component, as well as cases where an additional component is interposed between them.

[0018] When one component is referred to as being "connected" to another component, it may include cases where the one component is directly connected to the other component, as well as cases where an additional component is interposed between them.

[0019] Since the description of the disclosed technology is merely an example for structural or functional explanation, the scope of rights of the disclosed technology should not be interpreted as being limited by the examples described in the text. That is, since the examples can be modified in various ways and can take various forms, the scope of rights of the disclosed technology should be understood to include equivalents capable of realizing the technical concept.

[0020] A singular expression should be understood to include a plural expression unless the context clearly indicates otherwise, and terms such as “include” or “have” are intended to specify the existence of the implemented features, numbers, steps, actions, components, parts, or combinations thereof, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0021] Unless otherwise defined, all terms used herein have the same meaning as generally understood by a person skilled in the art to which the disclosed technology belongs. Terms defined in commonly used dictionaries should be interpreted as having meanings consistent with the context of the relevant technology and should not be interpreted as having an ideal or overly formal meaning unless explicitly defined in this application.

[0022] For convenience of explanation below, the battery charging / discharging device (100) equipped with a series-parallel switching switch disclosed in this specification will be abbreviated as the battery charging / discharging device (100).

[0023] FIG. 1 is a drawing showing a battery charging / discharging device (100) according to one embodiment. FIG. 1 (a) is a drawing showing a perspective view of the battery charging / discharging device (100) and the lower part of the switch part (140). FIG. 1 (b) is a drawing showing the appearance of the first battery module part (110) and the second battery module part (120) housed in the housing part (130). FIG. 2 is a drawing showing the lower part (Fig. 2 (a)) of the housing part cover (132) of the battery charging / discharging device (100) according to one embodiment and the upper part (Fig. 2 (b)) of the first battery module part (110) and the second battery module part (120) housed in the housing part (130). FIG. 3 is a drawing showing a projection from above in which a first battery module part (110) and a second battery module part (120) are accommodated in a receiving part (130) and the upper part of the receiving part (130) is covered with a receiving part cover (132). FIG. 3 is a drawing for explaining the operation of a switch part (140) of a battery charging / discharging device (100) according to one embodiment. FIG. 3 (a) is a drawing showing the appearance of a switch part (140) placed in a first position. FIG. 3 (b) is a drawing showing the appearance of a switch part (140) placed in a second position. FIG. 4 is a drawing showing a battery charging / discharging device (100) according to another embodiment. FIG. 4 (a) is a drawing showing a perspective view of the battery charging / discharging device (100) and the lower part of the switch part (140). FIG. 4(b) is a drawing showing the appearance of the first battery module (110) and the second battery module (120) housed in the housing portion (130). FIG. 5 is a drawing showing the lower part (Fig. 5(a)) of the housing portion cover (132) of a battery charging / discharging device (100) according to another embodiment and the upper part (Fig. 5(b)) of the first battery module (110) and the second battery module (120) housed in the housing portion (130). FIG. 6 is a drawing showing the appearance projected from above with the first battery module (110) and the second battery module (120) housed in the housing portion (130) and the upper part of the housing portion (130) covered by the housing portion cover (132).FIG. 6 is a drawing for explaining the operation of a switch unit (140) of a battery charging / discharging device (100) according to another embodiment. FIG. 6 (a) is a drawing showing the appearance of a switch unit (140) placed in a first position. FIG. 6 (b) is a drawing showing the appearance of a switch unit (140) placed in a second position.

[0024] A battery charging and discharging device (100) disclosed in this specification will be described below with reference to the drawings.

[0025] Referring to the drawings, the battery charging / discharging device (100) includes a first battery module section (110), a second battery module section (120), and a receiving section (130). In some other embodiments, the battery charging / discharging device (100) may optionally further include a plug (not shown). The plug may be connected to a first through-hole (142) and a second through-hole (144) provided in a switch section (140). The charging / discharging device (100) may provide power to the outside through the plug or receive a charging current from the outside.

[0026] The first battery module (110) and the second battery module (120) are each equipped with a first electrode terminal (112, 122) and a second electrode terminal (114, 124). In the drawings, the first electrode terminal (112) and the first electrode terminal (122) are depicted as positive electrodes, and the second electrode terminal (114) and the second electrode terminal (124) are depicted as negative electrodes. The above example is for the sake of understanding, and the polarity of the first electrode terminal (112), the first electrode terminal (122), the second electrode terminal (114), and the second electrode terminal (124) may be changed. For convenience of explanation, the following description will focus on the polarity shown in the drawings. It should be clearly stated that this description is not intended to limit the scope of rights of the technology disclosed in this specification.

[0027] The receiving portion (130) accommodates the first battery module portion (110) and the second battery module portion (120). The receiving portion (130) includes a switch portion (140). In the drawing, a switch portion (140) rotatably provided on the receiving portion cover (132) of the receiving portion (130) is illustrated as an example. Meanwhile, although not illustrated in the drawing, an elastic portion (not shown) may be provided on the bottom of the receiving portion (130). The elastic portion may be, for example, a coil spring, but is not limited thereto. When the first battery module (110) and the second battery module (120) are received in the receiving portion (130), the elastic portion can provide elastic force to the first battery module (110) and the second battery module (120) to cause the first electrode terminal (112) and the second electrode terminal (114) of the first battery module (110) and the first electrode terminal (122) and the second electrode terminal (124) of the second battery module (120) to be in close contact with one side of the receiving portion cover (132) or one side of the switch portion (140).

[0028] As illustrated as an example in FIG. 3(a), the switch unit (140) can electrically connect the first electrode terminal (112) and the second electrode terminal (114) of the first battery module unit (110) to the first electrode terminal (122) and the second electrode terminal (124) of the second battery module unit (120), respectively, at a first position. The switch unit (140) electrically connects the first electrode terminal (112) of the first battery module unit (110) and the second electrode terminal (124) of the second battery module unit (120) at a second position, and can move between the first position and the second position. At the first position, the first battery module unit (110) and the second battery module unit (120) can be connected in parallel by the switch unit (140). At the second position above, the first battery module (110) and the second battery module (120) can be connected in series by a switch (140).

[0029] Meanwhile, as illustrated as an example in the drawing, the first electrode terminal (112) and the second electrode terminal (14) of the first battery module (110) may be provided on one side of the first battery module (110). The first electrode terminal (122) and the second electrode terminal (124) of the second battery module (120) may be provided on one side of the second battery module (120). The said side of the second battery module (120) may face the same direction as the said side of the first battery module (110). The switch portion (140) may be provided on the part of the receiving portion (130)—hereinafter referred to as the receiving portion cover (132)—opposing the said side of the first battery module (110) and the said side of the second battery module (120). In this case, the switch portion (140) may be rotatably provided on the receiving portion cover (132). The switch portion (140) may move between the first position and the second position through rotation.

[0030] In one embodiment, as illustrated in FIGS. 2 and FIGS. 3, the switch unit (140) may include a fifth wiring unit (140-1), a sixth wiring unit (140-2), and a seventh wiring unit (140-3) that are spaced apart from each other and sequentially arranged on one side of the switch unit (140) facing the one side of the first battery module unit (110) and the one side of the second battery module unit (120). At this time, the first electrode terminal (112) and the second electrode terminal (14) of the first battery module (110) and the first electrode terminal (122) and the second electrode terminal (124) of the second battery module (120) may be provided on the one surface of the first battery module (110) and the one surface of the second battery module (120) in a long shape.

[0031] Through this, as illustrated as an example in FIG. 3, when the switch unit (140) is positioned at the first position (see FIG. 3 (a)) through the rotation of the switch unit (140), the first electrode terminal (112) and the second electrode terminal (14) of the first battery module unit (110) can be electrically connected to the first electrode terminal (122) and the second electrode terminal (124) of the second battery module unit (120), respectively, through the fifth wiring unit (140-1) and the seventh wiring unit (140-3) of the switch unit (140). When the switch unit (140) is positioned at the second position (see Fig. 3 (b)) through rotation of the switch unit (140), the first electrode terminal (112) of the first battery module unit (110) can be electrically connected to the second electrode terminal (124) of the second battery module unit (120) through the sixth wiring unit (140-2) of the switch unit (140).

[0032] The switch section (140) may include a first through hole (142) and a second through hole (144) spaced apart from each other, penetrating the other side of the switch section (140) and the first side of the switch section (140). The first through hole (142) and the second through hole (144) may be provided on the fifth wiring section (140-1) and the seventh wiring section (140-3), respectively. Through this, the fifth wiring section (140-1) and the seventh wiring section (140-3) may be exposed to the outside through the first through hole (142) and the second through hole (144), respectively. Meanwhile, at the second position, the fifth wiring section (140-1) and the seventh wiring section (140-3) can be electrically connected to the first electrode terminal (122) of the second battery module section (120) and the second electrode terminal (114) of the first battery module section (110), respectively. Through this, the technology disclosed in this specification can provide the effect of switching between series and parallel of the battery charging / discharging device (100) simply by rotating the switch section (140) while the plug is inserted into the first through hole (142) and the second through hole (144) provided in the switch section (140). When the first battery module (110) and the second battery module (120) are connected in parallel at the first position through the switch (140), and the first through hole (142) and the second through hole (144) are respectively designated as the first input terminal and the second input terminal, the resistance value visible through the first input terminal and the second input terminal has a parallel resistance value of the resistance value of the first battery module (110) and the resistance value of the second battery module (120), so that the resistance is reduced. When the first battery module (110) and the second battery module (120) are connected in series at the second position through the switch (140), and the first through hole (142) and the second through hole (144) are respectively the first input terminal and the second input terminal, the resistance value visible through the first input terminal and the second input terminal has a series resistance value of the resistance value of the first battery module (110) and the resistance value of the second battery module (120), and the resistance increases.When charging the first battery module (110) and the second battery module (120) from an external power source through the first input terminal and the second input terminal, the charging current increases as the resistance decreases at the same voltage. The technology disclosed in this specification allows the first battery module (110) and the second battery module (120) to be connected in parallel and charged through the switch unit (140), thereby increasing charging efficiency. Meanwhile, the technology disclosed in this specification allows the first battery module (110) and the second battery module (120) to be connected in series and discharged through the switch unit (140), thereby increasing the discharge voltage.

[0033] In another embodiment, as illustrated in FIGS. 5 and 6, one side of the receiving cover (132) may face the one side of the first battery module (110) and the one side of the second battery module (120). On the one side of the receiving cover (132), a first wiring section (132-1), a second wiring section (132-2), a third wiring section (132-3), and a fourth wiring section (132-4) may be provided spaced apart from each other. When the first battery module section (110) and the second battery module (120) are housed in the housing section (130) and the housing section cover (132) is covered, the first wiring section (132-1) and the second wiring section (132-2) can be electrically connected to the first electrode terminal (112) and the second electrode terminal (114) of the first battery module section (110), respectively. In this case, the third wiring section (132-3) and the fourth wiring section (132-4) can be electrically connected to the first electrode terminal (122) and the second electrode terminal (124) of the second battery module section (120), respectively. At this time, the switch unit (140) can electrically connect the first wiring unit (132-1) and the second wiring unit (132-2) to the third wiring unit (132-3) and the fourth wiring unit (132-4), respectively, at the first position, and electrically connect the first wiring unit (132-1) and the fourth wiring unit (132-4) at the second position. Through this, the switch unit (140) can electrically connect the first electrode terminal (112) and the second electrode terminal (114) of the first battery module unit (110) to the first electrode terminal (122) and the second electrode terminal (124) of the second battery module unit (120), respectively, at the first position, and electrically connect the first electrode terminal (112) of the first battery module unit (110) and the second electrode terminal (124) of the second battery module unit (120) at the second position.

[0034] The switch section (140) may include a fifth wiring section (140-1), a sixth wiring section (140-2), and a seventh wiring section (140-3) that are sequentially spaced apart from each other on the surface of the switch section (140) facing the surface of the first battery module section (110) and the surface of the second battery module section (120). At the first position, the fifth wiring section (140-1) can electrically connect the first wiring section (132-1) and the third wiring section (132-3). At the first position, the seventh wiring section (140-3) can electrically connect the second wiring section (132-2) and the fourth wiring section (132-4). At the second position, the sixth wiring section (140-2) can electrically connect the first wiring section (132-1) and the fourth wiring section (132-4), or electrically connect the second wiring section (132-2) and the third wiring section (132-3). At the first position, the first battery module section (110) and the second battery module section (120) can be connected in parallel by the switch section (140). At the second position, the first battery module section (110) and the second battery module section (120) can be connected in series by the switch section (140).

[0035] The switch section (140) may include a first through hole (142) and a second through hole (144) spaced apart from each other, penetrating the other side of the switch section (140) and the one side of the switch section (140). The first through hole (142) and the second through hole (144) may be provided on the fifth wiring section (140-1) and the seventh wiring section (140-3), respectively. Through this, the fifth wiring section (140-1) and the seventh wiring section (140-3) may be exposed to the outside through the first through hole (142) and the second through hole (144), respectively. For example, at the second position, the sixth wiring section (140-2) electrically connects the first wiring section (132-1) and the fourth wiring section (132-4), and at the second position, the fifth wiring section (140-1) and the seventh wiring section (140-3) can be electrically connected to the third wiring section (132-2) and the second wiring section (132-2), respectively. Through this, the technology disclosed in this specification can provide the effect of switching between series and parallel of the battery charging / discharging device (100) simply by rotating the switch section (140) while the plug is inserted into the first through hole (142) and the second through hole (144) provided in the switch section (140). When the first battery module (110) and the second battery module (120) are connected in parallel at the first position through the switch (140), and the first through hole (142) and the second through hole (144) are respectively designated as the first input terminal and the second input terminal, the resistance value visible through the first input terminal and the second input terminal has a parallel resistance value of the resistance value of the first battery module (110) and the resistance value of the second battery module (120), so that the resistance is reduced. When the first battery module (110) and the second battery module (120) are connected in series at the second position through the switch (140), and the first through hole (142) and the second through hole (144) are respectively the first input terminal and the second input terminal, the resistance value visible through the first input terminal and the second input terminal has a series resistance value of the resistance value of the first battery module (110) and the resistance value of the second battery module (120), and the resistance increases.When charging the first battery module (110) and the second battery module (120) from an external power source through the first input terminal and the second input terminal, the charging current increases as the resistance decreases at the same voltage. The technology disclosed in this specification allows the first battery module (110) and the second battery module (120) to be connected in parallel and charged through the switch unit (140), thereby increasing charging efficiency. Meanwhile, the technology disclosed in this specification allows the first battery module (110) and the second battery module (120) to be connected in series and discharged through the switch unit (140), thereby increasing the discharge voltage.

[0036] The above-described embodiments are examples for explaining the operation of the battery charging and discharging device (100) disclosed in this specification, and it is obvious that they can be applied in various combinations other than the combinations of the above-described examples.

[0037] From the foregoing, it will be understood that various embodiments of the present disclosure have been described for illustrative purposes, and that various possible modifications exist without departing from the scope and spirit of the present disclosure. Furthermore, the various embodiments disclosed are not intended to limit the spirit of the present disclosure, and the true spirit and scope will be set forth in the following claims. Explanation of the symbols

[0038] 100: Battery charging and discharging device equipped with a series-parallel switching switch 110: 1st Battery Module Section 112: First electrode terminal 114: Second electrode terminal 120: Second battery module section 122: First electrode terminal 124: Second electrode terminal 130: Reception Department 132: Reception area cover 132-1: 1st Wiring Section 132-2: Second Wiring Section 132-3: Third Wiring Section 132-4: 4th Wiring Section 140: Switch section 140-1: 5th Wiring Section 140-2: 6th Wiring Section 140-3: 7th Wiring Section 142: First penetration hole 144: Second penetration hole

Claims

Claim 1 A first battery module part and a second battery module part each having a first electrode terminal and a second electrode terminal; a receiving part in which the first battery module part and the second battery module part are accommodated; The device includes a switch portion provided in the receiving portion, wherein the first electrode terminal and the second electrode terminal of the first battery module portion are provided on one surface of the first battery module portion, and the first electrode terminal and the second electrode terminal of the second battery module portion are provided on one surface of the second battery module portion, and the one surface of the second battery module portion faces the same direction as the one surface of the first battery module portion, and the receiving portion includes a receiving portion cover facing the one surface of the first battery module portion and the one surface of the second battery module portion, and the switch portion is rotatably provided on the receiving portion cover and moves between a first position and a second position through rotation, and the switch portion includes a fifth wiring portion, a sixth wiring portion, and a seventh wiring portion that are sequentially spaced apart from each other and are provided on one surface of the switch portion facing the one surface of the first battery module portion and the one surface of the second battery module portion. A battery charging and discharging device comprising a series-parallel switching switch, wherein when the switch portion is positioned at the first position, the first electrode terminal and the second electrode terminal of the first battery module are electrically connected to the first electrode terminal and the second electrode terminal of the second battery module, respectively, through the fifth wiring portion and the seventh wiring portion, and when the switch portion is positioned at the second position, the first electrode terminal of the first battery module is electrically connected to the second electrode terminal of the second battery module through the sixth wiring portion. Claim 2 A battery charging and discharging device having a series-parallel switching switch, wherein, in claim 1, when the switch unit is located at the first position, the first battery module unit and the second battery module unit are connected in parallel, and when the switch unit is located at the second position, the first battery module unit and the second battery module unit are connected in series. Claim 3 A battery charging and discharging device according to claim 1, wherein a first wiring section, a second wiring section, a third wiring section, and a fourth wiring section are provided spaced apart from each other on one side of the receiving section cover, wherein the first wiring section and the second wiring section are each electrically connected to the first electrode terminal and the second electrode terminal of the first battery module section, and the third wiring section and the fourth wiring section are each electrically connected to the first electrode terminal and the second electrode terminal of the second battery module section, and wherein the switch section is equipped with a series-parallel switching switch that electrically connects the first wiring section and the second wiring section to the third wiring section and the fourth wiring section at the first position, and electrically connects the first wiring section and the fourth wiring section at the second position. Claim 4 A battery charging and discharging device according to claim 1, wherein the switch portion includes a first through hole and a second through hole spaced apart from each other that penetrate the other surface of the switch portion and the first surface of the switch portion, and the first through hole and the second through hole are provided on the fifth wiring portion and the seventh wiring portion, respectively, so that the fifth wiring portion and the seventh wiring portion are exposed to the outside through the first through hole and the second through hole, respectively, and the series-parallel switching switch is provided such that the series and parallel switching is switched by simply rotating the switch portion while the plug is fastened to the first through hole and the second through hole. Claim 5 delete

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