Breaker

Abstract

To improve the operational reliability of a blocking device.SOLUTION: A blocking device 1 includes a water cooler 2 having a first main surface 2A and a second main surface 2B opposite to the first main surface 2A, a first insulator 3 provided in contact with the first main surface 2A, a first charging relay 4 and a first discharging relay 5 arranged in contact with the surface of the first insulator 3 opposite to the contact surface with the first main surface 2A, a second insulator 6 provided in contact with the second main surface 2B, a protective portion 7 arranged in contact with the surface of the second insulator 6 opposite to the contact surface with the second main surface 2B, a first storage terminal 8 connected to a first electrode 21A of a storage element 21, and a second storage terminal 9 connected to a second electrode 21B of the storage element 21. At least a part of the protective portion 7 is located at a position where the first insulator 3, the water cooler 2, and the second insulator 6 are interposed with respect to a first space 22 separating the first charging relay 4 and the first discharging relay 5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a circuit breaker used in various types of vehicle electrical equipment. [Background technology]

[0002] A conventional circuit breaker is described below. The conventional circuit breaker includes a base, a plurality of relays fixed to the base, and a protection device for protecting the relays and devices connected to the relays when an overcurrent flows through the relays. The multiple relays are spaced far apart from each other to suppress temperature rise in the relays and the protection device.

[0003] As prior art document information related to the invention of this application, for example, Patent Document 1 is known. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2020 / 100612 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in conventional circuit breaker devices, if multiple relays are arranged at a large distance from each other to prioritize suppression of temperature rise, the circuit breaker device becomes larger, while if multiple relays are arranged at a small distance from each other, the temperature of the relays and protective devices is likely to rise during operation, which may result in a decrease in the operational reliability of the circuit breaker device.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to improve the operational reliability of a circuit breaker while preventing the circuit breaker from becoming large. [Means for solving the problem]

[0007] In order to achieve this object, the present invention provides a water cooler having a first main surface and a second main surface that is an opposite surface to the first main surface, a first insulator provided in contact with the first main surface, a first charging relay and a first discharging relay arranged in contact with a surface of the first insulator opposite to the contact surface with the first main surface, each of the first charging relay and the first discharging relay having a first end and a second end, a second insulator provided in contact with the second main surface, a protection unit arranged in contact with a surface of the second insulator opposite to the contact surface with the second main surface, the protection unit having a first end and a second end, a first storage terminal connected to a first pole of a storage element, a second storage terminal connected to a second pole of the storage element, a first charging terminal, a second charging terminal, a first output terminal, a second output terminal, and a first end of the protection unit and the first storage terminal. the first conductor connecting the first end of the protection unit and the first end of the first discharge relay, a second conductor connecting the second end of the protection unit and the first end of the first charging relay, a fourth conductor connecting the second end of the first discharge relay and the first output terminal, a fifth conductor connecting the second end of the first charging relay and the first charging terminal, a sixth conductor connecting the second storage terminal and the second output terminal, and a seventh conductor connecting the second storage terminal and the second charging terminal, and at least a portion of the protection unit is disposed at a position interposed between the first insulator, the water cooler, and the second insulator with respect to a first space separating the first charging relay and the first discharge relay. Effect of the Invention

[0008] According to the present invention, the first charging relay, the first discharging relay, and the protective unit are located on opposite sides of the water cooler and are each cooled, allowing for efficient cooling.Furthermore, the protective unit is positioned in a position interposed between the first insulator, the water cooler, and the second insulator with respect to the first space separating the first charging relay and the first discharging relay, so that the length of the second conductor to which power is supplied from the storage element can be set short, making it possible to reduce heat generation associated with an increase in DC resistance.

[0009] As a result, even if the first charging relay, the first discharging relay, and the protection unit are arranged closely together, the temperature rise of the circuit breaker is easily suppressed, and the operational reliability of the circuit breaker can be improved. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a first structural schematic diagram showing a configuration of a cutoff device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a second schematic diagram showing the configuration of the interrupter according to the embodiment of the present invention; [Diagram 3] FIG. 3 is a third schematic diagram showing the configuration of the interrupter according to the embodiment of the present invention; [Figure 4] FIG. 4 is a schematic diagram showing the configuration of the interrupter according to the embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] (Embodiment) FIG. 1 is a first schematic diagram showing the configuration of a circuit breaker 1 according to an embodiment of the present invention, and FIG. 2 is a second schematic diagram showing the configuration of the circuit breaker 1 according to the embodiment of the present invention.

[0013] The circuit breaker 1 includes a water cooler 2, a first insulator 3, a first charging relay 4, a first discharging relay 5, a second insulator 6, a protective section 7, a first storage terminal 8, a second storage terminal 9, a first charging terminal 10, a second charging terminal 11, a first output terminal 12, a second output terminal 13, a first conductor 14, a second conductor 15, a third conductor 16, a fourth conductor 17, a fifth conductor 18, a sixth conductor 19, and a seventh conductor 20.

[0014] The water cooler 2 has a first main surface 2A and a second main surface 2B that is the opposite surface to the first main surface 2A, and a first insulator 3 is arranged in contact with the first main surface 2A. Furthermore, a first charging relay 4 and a first discharge relay 5 are arranged in contact with the first insulator 3 on the underside of the first insulator 3 in the figure that is the opposite surface to the contact surface between the first insulator 3 and the first main surface 2A. The first charging relay 4 has a first end 4A and a second end 4B, and the first discharge relay 5 has a first end 5A and a second end 5B. A second insulator 6 is disposed in contact with the second main surface 2B. A protective portion 7 is disposed in contact with the second insulator 6 on the upper side of the second insulator 6 in the figure, which is the surface opposite to the contact surface between the second insulator 6 and the second main surface 2B. The protective portion 7 has a first end 7A and a second end 7B.

[0015] Note that Figure 1 illustrates a state in which the first charging relay 4 and the first discharging relay 5 are arranged in contact with the first insulator 3, as a state showing a substantial embodiment of the invention, but for ease of explanation, Figure 2 illustrates the first charging relay 4 and the first discharging relay 5 in a state in which they are not arranged in contact with the first insulator 3.

[0016] The first storage terminal 8 is connected to a first pole 21A of the storage element 21. The second storage terminal 9 is connected to a second pole 21B of the storage element 21.

[0017] The first conductor 14 connects the first terminal 7A of the protection unit 7 to the first storage terminal 8. The second conductor 15 connects the second terminal 7B of the protection unit 7 to the first terminal 5A of the first discharge relay 5. The third conductor 16 connects the second terminal 7B of the protection unit 7 to the first terminal 4A of the first charging relay 4. The fourth conductor 17 connects the second terminal 5B of the first discharge relay 5 to the first output terminal 12. The fifth conductor 18 connects the second terminal 4B of the first charging relay 4 to the first charging terminal 10. The sixth conductor 19 connects the second storage terminal 9 to the second output terminal 13. The seventh conductor 20 connects the second storage terminal 9 to the second charging terminal 11.

[0018] Here, the first space 22 is provided to separate the first charging relay 4 and the first discharging relay 5, and at least a part of the protection unit 7 is positioned relative to the first space 22, with the first insulator 3, the water cooler 2, and the second insulator 6 interposed therebetween.

[0019] As a result, the first charging relay 4, the first discharging relay 5, and the protective unit 7 are arranged so that heat generated from the first charging relay 4 and the first discharging relay 5 arranged on one side of the water cooler 2 is unlikely to affect the protective unit 7 arranged on the opposite side of the water cooler 2, and each of them is cooled, so that they can be cooled efficiently. Furthermore, by arranging the protective unit 7 at a position interposed between the first insulator 3, the water cooler 2, and the second insulator 6 with respect to the first space separating the first charging relay 4 and the first discharging relay 5, the length of the second conductor 15 to which power from the storage element 21 is supplied can be set short, and heat generation in the second conductor 15 due to an increase in the DC resistance value of the second conductor 15 connected to a position to which a large current is frequently supplied from the storage element 21 can be reduced.

[0020] As a result, even if the first charging relay 4, the first discharging relay 5, and the protection unit 7 are arranged closely together, the temperature rise of the circuit breaker 1 is easily suppressed, and the operational reliability of the circuit breaker 1 can be improved.

[0021] The details of the circuit breaker 1 will be described below with reference to Figures 1 and 2. As described above, the circuit breaker 1 includes the water cooler 2, the first insulator 3, the first charging relay 4, the first discharging relay 5, the second insulator 6, the protection section 7, the first storage end 8, the second storage end 9, the first charging end 10, the second charging end 11, the first output end 12, the second output end 13, the first conductor 14, the second conductor 15, the third conductor 16, the fourth conductor 17, the fifth conductor 18, the sixth conductor 19, and the seventh conductor 20.

[0022] Here, the first conductor 14, the second conductor 15, the third conductor 16, the fourth conductor 17, the fifth conductor 18, the sixth conductor 19, and the seventh conductor 20 are bus bars formed by bending or straightening a single copper plate having a large thickness. The water cooler 2 has a generally plate-like external shape, and the width of the water cooler 2 corresponding to the depth direction in the figure is larger than the width of the bus bars.

[0023] The first insulator 3 and the second insulator 6 are arranged in contact with the water cooler 2. The first insulator 3 and the second insulator 6 may be provided as an insulating layer, or may be a plate-shaped structure made of resin in contact with the water cooler 2, or may be a housing-shaped structure including a plate-shaped structure made of resin in contact with the water cooler 2. Naturally, the first insulator 3 and the second insulator 6 may be composed of both an insulating layer and a resin structure. In particular, since the first charging relay 4 and the first discharging relay 5 are devices having weight and the first charging relay 4 and the first discharging relay 5 are also devices that generate mechanical vibration, it is preferable that the first insulator 3 is configured to include a resin structure and to hold a part of the first charging relay 4 and the first discharging relay 5. In addition, a fuse or the like is generally used as the protection unit 7. Therefore, the second insulator 6 may be an insulating layer or the like and may be configured to have a smaller mechanical rigidity than the first insulator 3.

[0024] The first insulator 3 is provided in contact with the first charging relay 4 and the first discharge relay 5. The first insulator 3 may be provided in contact with the exterior body 4C of the first charging relay 4 and the exterior body 5C of the first discharge relay 5, or the first insulator 3 may be provided in contact with the first terminal 4A and the second terminal 4B of the first charging relay 4, and the first insulator 3 may be provided in contact with the first terminal 5A and the second terminal 5B of the first discharge relay 5. The first charging relay 4 can put the first terminal 4A and the second terminal 4B of the first charging relay 4 into a connected state or a disconnected state, and the switching between the connected state and the disconnected state is controlled by a control device (not shown) provided outside the circuit breaker 1. Similarly, the first discharge relay 5 can put the first terminal 5A and the second terminal 5B of the first discharge relay 5 into a connected state or a disconnected state, and the switching between the connected state and the disconnected state is controlled by a control device (not shown) provided outside the circuit breaker 1.

[0025] The first storage terminal 8 is connected to a first pole 21A of the storage element 21, and the second storage terminal 9 is connected to a second pole 21B of the storage element 21. The storage element 21 is a high-voltage storage battery such as a lithium battery provided outside the circuit breaker 1, and the first pole 21A may be a positive electrode and the second pole 21B may be a negative electrode, or the first pole 21A may be a negative electrode and the second pole 21B may be a positive electrode. In this embodiment, the first pole 21A is described as a positive electrode and the second pole 21B is a negative electrode. Also, the storage element 21 and the circuit breaker 1 may be collectively defined as a circuit breaker system.

[0026] The first charging terminal 10 and the second charging terminal 11 can be connected to a power supply device (not shown) provided outside the circuit breaker 1 for charging the storage element 21. The first output terminal 12 and the second output terminal 13 can be connected to a driving device (not shown) such as a motor that corresponds to a load that supplies power from the storage element 21. Here, the current flowing through the first output terminal 12 and the second output terminal 13 may temporarily supply a very large current to the load (not shown), and this value is larger than the current flowing through the first charging terminal 10 and the second charging terminal 11 for charging the storage element 21.

[0027] The first conductor 14 connects the first end 7A of the protection unit 7 and the first storage end 8. Here, it is preferable that the first conductor 14 and the first storage end 8 are configured from a single conductor. The first storage end 8 is preferably provided with a fixing fastening part (not shown) that enables coupling to the first pole 21A. The first conductor 14 and the first end 7A of the protection unit 7 are connected by a fixing fastening part (not shown).

[0028] The second conductor 15 connects the second end 7B of the protection unit 7 and the first end 5A of the first discharge relay 5. Furthermore, the third conductor 16 connects the second end 7B of the protection unit 7 and the first end 4A of the first charging relay 4. Here, the second end 7B is connected to the second conductor 15 and the third conductor 16 by a fixing fastener (not shown).

[0029] The fourth conductor 17 connects the second terminal 5B of the first discharge relay 5 and the first output terminal 12. Here, it is preferable that the fourth conductor 17 and the first output terminal 12 are configured as a single conductor. The first output terminal 12 is preferably provided with a fixing fastening portion (not shown) that enables coupling to a load (not shown). The first terminal 5A of the first discharge relay 5 is disposed at a position closer to the second terminal 7B of the protection unit 7 than the second terminal 5B of the first discharge relay 5.

[0030] The fifth conductor 18 connects the second terminal 4B of the first charging relay 4 and the first charging terminal 10. Here, it is preferable that the fifth conductor 18 and the first charging terminal 10 are configured as a single conductor. The first charging terminal 10 is preferably provided with a fastening portion (not shown) for fixing, which enables connection to a power supply device (not shown). The first terminal 4A of the first charging relay 4 is disposed at a position closer to the second terminal 7B of the protection unit 7 than the second terminal 4B of the first charging relay 4.

[0031] The sixth conductor 19 connects the second storage terminal 9 and the second output terminal 13. Here, it is preferable that the sixth conductor 19 and the second output terminal 13 are configured from a single conductor. The second output terminal 13 is preferably provided with a fixing fastening portion (not shown) that enables coupling to a load (not shown).

[0032] The seventh conductor 20 connects the second storage end 9 and the second charging end 11. Here, it is preferable that the seventh conductor 20 and the second charging end 11 are configured as a single conductor. The second charging end 11 is preferably provided with a fixing fastening portion (not shown) that enables it to be coupled to a power supply device (not shown).

[0033] Moreover, the sixth conductor 19, the seventh conductor 20 and the second storage terminal 9 are connected to each other by a fixing fastening portion (not shown).

[0034] The connection and fixation between the second conductor 15 and the first end 5A of the first discharge relay 5, the connection and fixation between the fourth conductor 17 and the second end 5B of the first discharge relay 5, the connection and fixation between the third conductor 16 and the first end 4A of the first charging relay 4, and the connection and fixation between the fifth conductor 18 and the second end 4B of the first charging relay 4 are connected by fixing fastening parts (not shown), and the above connections and fixation are in contact with the first insulator 3 and are thermally coupled.

[0035] 1 and 2, the second conductor 15, the third conductor 16, the sixth conductor 19, and the seventh conductor 20 are shown penetrating the first insulator 3, the water cooler 2, and the second insulator 6. However, the second conductor 15, the third conductor 16, the sixth conductor 19, and the seventh conductor 20 do not need to penetrate the first insulator 3, the water cooler 2, and the second insulator 6, and may be provided so as to connect the upper and lower surfaces of the water cooler 2 in the figures while being routed from the edges of the first insulator 3, the water cooler 2, and the second insulator 6.

[0036] With the above configuration, the main body of the first charging relay 4 and the first discharging relay 5, which are prone to heat generation due to the internal operation coils, and the area where the first charging relay 4 and the first discharging relay 5, which are prone to heat generation due to the presence of contact resistance, are connected and fixed to the bus bar, are arranged on one side of the water cooler 2 (the lower side in the figure). The protective unit 7, whose operating characteristics may be adversely affected by heat, is arranged on the other side of the water cooler 2 (the upper side in the figure). The arrangement is such that the heat generated from the first charging relay 4 and the first discharging relay 5 arranged on one side of the water cooler 2 is unlikely to affect the protective unit 7 located on the other opposite side of the water cooler 2, and the cooling target is distributed on both sides of the water cooler 2, so that almost the entire surface of the water cooler 2 acts on cooling, and the cooling targets such as the first charging relay 4, the first discharge relay 5, and the protective unit 7 can be efficiently cooled. Furthermore, the protection unit 7 is arranged at a position facing the first space 22 separating the first charging relay 4 and the first discharging relay 5, with the first insulator 3, the water cooler 2, and the second insulator 6 interposed therebetween. This makes it possible to set the length of the second conductor 15, which corresponds to the path through which large current and large power are supplied from the storage element 21 to a load (not shown), particularly to a load (not shown), short, and makes it possible to suppress heat generation in the second conductor 15 due to an increase in the DC resistance value of the second conductor 15, which is connected to a position where large current is frequently supplied from the storage element 21.

[0037] As a result, even if the first charging relay 4, the first discharging relay 5, and the protection unit 7 are arranged closely together, the temperature rise of the circuit breaker 1 is easily suppressed, and the operational reliability of the circuit breaker 1 can be improved.

[0038] Here, the second conductor 15 and the third conductor 16 may be arranged in contact with the surface opposite to the contact surface with the first main surface 2A of the first insulator 3. As a result, heat propagated from the first charging relay 4 and the first discharging relay 5 to the second conductor 15 and the third conductor 16 and heat generated as a current flows through the second conductor 15 and the third conductor 16 are efficiently transferred to the water cooler 2 via the first insulator 3 and dissipated. Here, the second conductor 15 and the third conductor 16 are copper plate-like bus bars with a generally rectangular cross section, and the wide surfaces of the second conductor 15 and the third conductor 16 may be configured to contact the first insulator 3. In addition, it is not necessary for the entire second conductor 15 and the third conductor 16 to contact the first insulator 3 over their entire length, and a part of the second conductor 15 and the third conductor 16 may be in contact with the first insulator 3.

[0039] Here, the length of second conductor 15 is preferably shorter than the length of third conductor 16. As described above, second conductor 15 corresponds to the positive side path through which a large current and a large power are supplied to a load (not shown) from power storage element 21. On the other hand, third conductor 16 corresponds to the positive side power supply path from a power supply device (not shown) to power storage element 21, and in comparison, the period during which the current is smaller than that flowing through second conductor 15 is longer. For this reason, it is desirable to make the length of second conductor 15 shorter than the length of third conductor 16 in order to reduce the DC resistance and suppress heat generation and loss.

[0040] The sixth conductor 19 and the seventh conductor 20 may be arranged in contact with the surface opposite to the contact surface with the first main surface 2A of the first insulator 3. Heat generated by current flowing through the sixth conductor 19 and the seventh conductor 20 is efficiently transferred to the water cooler 2 via the first insulator 3 and dissipated. Thus, the sixth conductor 19 and the seventh conductor 20 may be copper plate-like bus bars having a generally rectangular cross section, and the wide surfaces of the sixth conductor 19 and the seventh conductor 20 may be in contact with the first insulator 3. It is not necessary for the entire sixth conductor 19 and the seventh conductor 20 to be in contact with the first insulator 3 over their entire length, and only a part of the sixth conductor 19 and the seventh conductor 20 may be in contact with the first insulator 3.

[0041] Furthermore, the length of the sixth conductor 19 should preferably be shorter than the length of the seventh conductor 20. The sixth conductor 19 corresponds to a negative-side path through which a large current and a large power are supplied to a load (not shown) from the energy storage element 21. On the other hand, the seventh conductor 20 corresponds to a negative-side power supply path from a power supply device (not shown) to the energy storage element 21, and in comparison, the period during which the current is smaller than that flowing through the sixth conductor 19 is longer. For this reason, it is desirable to make the length of the sixth conductor 19 shorter than the length of the seventh conductor 20 in order to reduce the DC resistance and suppress heat generation and loss.

[0042] Furthermore, as shown in the third structural schematic diagram of FIG. 3 showing the configuration of the breaker in the embodiment of the present invention and the fourth structural schematic diagram of FIG. 4 showing the configuration of the breaker in the embodiment of the present invention, a second charging relay 23 and a second discharge relay 24 may be further provided, which are arranged in contact with the surface opposite to the contact surface with the first main surface 2A of the first insulator 3. In this case, the second discharge relay 24 is arranged so as to be able to connect the sixth conductor 19 and the second output terminal 13. The sixth conductor 19 is connected to the first terminal 24A of the second discharge relay 24, and the second output terminal 13 is connected to the second terminal 24B of the second discharge relay 24. In addition, the second charging relay 23 is arranged so as to be able to connect the seventh conductor 20 and the second charging terminal 11. The seventh conductor 20 is connected to the first terminal 23A of the second charging relay 23, and the second charging terminal 11 is connected to the second terminal 23B of the second charging relay 23.

[0043] Here again, as with Figures 1 and 2 described above, Figure 3 illustrates a state in which the second charging relay 23 and the second discharging relay 24 are arranged in contact with the first insulator 3, as a state showing a substantial embodiment of the invention, but in Figure 4, for ease of explanation, the second charging relay 23 and the second discharging relay 24 are illustrated in a state in which they are not arranged in contact with the first insulator 3.

[0044] The second charging relay 23 can put the first terminal 23A and the first terminal 23B of the second charging relay 23 into a connected state or a disconnected state, and the switching between the connected state and the disconnected state is controlled by a control device (not shown) provided outside the circuit breaker 1. Similarly, the second discharge relay 24 can put the first terminal 24A and the second terminal 24B of the second discharge relay 24 into a connected state or a disconnected state, and the switching between the connected state and the disconnected state is controlled by a control device (not shown) provided outside the circuit breaker 1.

[0045] The second output terminal 13 and the second charging terminal 11 are connected to the second pole 21B corresponding to the negative electrode of the storage element 21 via the second charging relay 23 and the second discharging relay 24. This allows for a state in which connection and disconnection can be switched between the positive electrode side and the negative electrode side between the storage element 21 and the load (not shown) and between the power supply device (not shown) and the storage element 21, resulting in improved operational reliability of the circuit breaker 1.

[0046] Furthermore, the second charging relay 23 and the second discharging relay 24 may be disposed in the first space 22. Also, the second charging relay 23 may be disposed between the second discharging relay 24 and the first charging relay 4. Alternatively, the second charging relay 23 may be disposed adjacent to the second discharging relay 24 and the first charging relay 4. The sixth conductor 19 is shorter than the second conductor 15, and the seventh conductor 20 is shorter than the third conductor 16.

[0047] This reduces the DC resistance of the sixth conductor 19 and the seventh conductor 20, suppresses heat generation when a large current flows through the sixth conductor 19 and the seventh conductor 20, and suppresses the effect of heat on the energy storage element 21. On the other hand, the second conductor 15 and the third conductor 16, through which roughly the same current as that of the sixth conductor 19 and the seventh conductor 20 flows, generate more heat than the sixth conductor 19 and the seventh conductor 20, but are connected to the energy storage element 21 with the protective unit 7 and the first conductor 14, a part of which can come into contact with the second insulator 6, interposed therebetween. Therefore, the effect of heat on the energy storage element 21 is mitigated by the protective unit 7 and the first conductor 14.

[0048] Here, the temperature of the protection unit 7 may be set to be lower than the temperatures of the first charging relay 4 and the first discharging relay 5. Furthermore, the temperature of the protection unit 7 may be set to be lower than the temperatures of the second charging relay 23 and the second discharging relay 24. In other words, the temperature range in which the protection unit 7 can operate normally may be set to a range lower than the temperature range in which the first charging relay 4, the first discharging relay 5, the second charging relay 23, and the second discharging relay 24 can operate normally.

[0049] The protection unit 7 is provided on the second main surface 2B side of the water cooler 2, and enjoys a greater cooling effect than the first charging relay 4, first discharging relay 5, second charging relay 23, and second discharging relay 24, which are concentrated on the first main surface 2A side of the water cooler 2, thereby suppressing the rise in temperature. [Industrial Applicability]

[0050] The cutoff device of the present invention has an effect of improving operational reliability, and is useful in various types of vehicle electronic equipment. [Explanation of symbols]

[0051] 1. Circuit Breaker 2 water cooler 2A 1st main surface 2B 2nd main surface 3 First insulator 4. 1st charging relay 5. First discharge relay 6 Second Insulator 7 Protective part 8 First storage terminal 9 Second storage terminal 10 1st charging end 11 2nd charging end 12 First output terminal 13 Second output terminal 14 First Conductor 15 Second Conductor 16 Third Conductor 17 4th Conductor 18 5th Conductor 19 6th Conductor 20 7th Conductor 21 Energy storage element 21A 1st pole 21B 2nd pole 22 1st space 23 Second charging relay 24 Second discharge relay

Claims

1. a water cooler having a first main surface and a second main surface opposite to the first main surface; a first insulator provided in contact with the first main surface; a first charging relay and a first discharging relay, each having a first end and a second end, disposed in contact with a surface of the first insulator opposite to a contact surface thereof with the first main surface; a second insulator provided in contact with the second main surface; a protective portion disposed in contact with a surface of the second insulator opposite to a surface that contacts the second main surface, the protective portion having a first end and a second end; a first storage terminal connected to a first electrode of the storage element; a second storage terminal connected to a second electrode of the storage element; A first charging terminal; A second charging terminal; A first output terminal; A second output terminal; a first conductor connecting a first end of the protection portion and the first storage end; a second conductor connecting a second end of the protection unit and a first end of the first discharge relay; a third conductor connecting a second end of the protection unit and a first end of the first charging relay; a fourth conductor connecting the second terminal of the first discharge relay and the first output terminal; a fifth conductor connecting a second end of the first charging relay and the first charging end; a sixth conductor connecting the second storage terminal and a second output terminal; a seventh conductor connecting the second storage end and a second charging end; Equipped with At least a portion of the protection unit is disposed at a position interposed between the first insulator, the water cooler, and the second insulator with respect to a first space separating the first charging relay and the first discharging relay. Shutdown device.

2. the second conductor and the third conductor are arranged in contact with a surface of the first insulator opposite to a surface that contacts the first main surface, The shutoff device according to claim 1 .

3. The length of the second conductor is shorter than the length of the third conductor. The shutoff device according to claim 1.

4. the sixth conductor and the seventh conductor are arranged in contact with a surface of the first insulator opposite to a surface that contacts the first main surface, The shutoff device according to claim 1 .

5. The sixth conductor has a length shorter than the seventh conductor. The shutoff device according to claim 1 .

6. a second charging relay and a second discharging relay arranged in contact with a surface of the first insulator opposite to a contact surface thereof with the first main surface, the second discharge relay is arranged to be able to connect the sixth conductor and the second output terminal, the second charging relay is arranged to be able to connect the seventh conductor and the second charging terminal; The shutoff device according to claim 1 .

7. the second charging relay and the second discharging relay are disposed in the first space, the sixth conductor is shorter than the second conductor; the seventh conductor is shorter than the third conductor; The shutoff device according to claim 6.

8. The temperature of the protection unit is lower than the temperatures of the first charging relay and the first discharging relay. The shutoff device according to claim 1 .

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