Switching device and energy storage system

Abstract

The utility model discloses a switching device and an energy storage system, the switching device is used for a charging and discharging circuit, the charging and discharging circuit comprises a main loop and a pre-charging circuit, and the main loop comprises at least two branch circuits; comprising first switches which are respectively arranged corresponding to each branch and are used for being connected to the corresponding branch; the second switch is used for being connected with the pre-charging circuit in parallel, and the second switch is further used for being connected with one of the first switches in series to a branch where the first switch is located; the first switch and the second switch are connected or disconnected according to a set sequence. The switching device provided by the utility model has the advantages of fewer devices, simpler structure and control logic, lower cost and reduced occupied space while satisfying the control function of the charging and discharging circuit.

Description

TECHNICAL FIELD

[0001] The utility model relates to switch technology field especially, and it is a kind of switch device and energy storage system. BACKGROUND

[0002] In the current energy storage system, each battery cluster will have a high voltage box to control the charge and discharge of battery. The working voltage of high voltage box in the industry is from 1000VDC to 2000VDC, and the working current is from 200A to 400A. The high voltage box usually includes a disconnecting switch, two main contactors and a pre-charge circuit contactor with a series resistor. The positive and negative poles are protected by a fuse for short circuit protection and a Hall sensor for current monitoring.

[0003] The traditional high voltage box electric circuit control switch uses a scheme of two main contactors, a pre-charge contactor and a disconnecting switch. This scheme requires more devices, occupies more installation space, is complicated to assemble, and has a complex control logic.

[0004] Therefore, the prior art has a new type of high voltage box, which integrates the functions of the switch components in the traditional high voltage box and only includes two main contactors and two pre-charge contactors, thereby reducing the volume and cost. However, this new type of high voltage box still has the following disadvantages: on the one hand, it needs to use four contactors and at least two sets of driving mechanisms, so it still requires more devices and occupies more space; on the other hand, it connects the two pre-charge contactors in parallel with the two main contactors, which means that the pre-charge contactors and the main contactors need to have an isolation capability of 1000VDC to 2000VDC working voltage. However, due to space limitations, the electrical clearance of the pre-charge contactors cannot meet the safety requirements. SUMMARY

[0005] The utility model provides a kind of switch device and energy storage system to solve the technical problems existing in prior art, which meets the charge and discharge circuit control function, simplifies the structure, reduces the cost and meets the safety requirements by structural improvement.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: a switch device for a charge and discharge circuit, the charge and discharge circuit includes a main circuit and a pre-charge circuit, the main circuit includes at least two branches; comprising:

[0007] A first switch is provided for each branch, and the first switch is connected to the corresponding branch.

[0008] A second switch is provided for each branch, and the second switch is connected to the corresponding branch.

[0009] The first switch and the second switch are closed or opened in a set order.

[0010] Further, the first switch is arranged to be closed or opened synchronously, and the second switch is arranged to be closed or opened synchronously; the driving mechanism is connected to the first switch and the second switch to drive the first switch and the second switch to be closed or opened in a set order.

[0011] The driving mechanism comprises a driving shaft, a first driving wheel for driving the first switch to be closed or opened, and a second driving wheel for driving the second switch to be closed or opened; the first driving wheel is coaxially fixed to the driving shaft, and the second driving wheel is sleeved on the driving shaft and is provided with a free stroke between the first driving wheel and / or the driving shaft, so that the driving shaft controls the first driving wheel and the second driving wheel to rotate in time sequence.

[0012] Further, the driving mechanism further comprises a first driven wheel and a second driven wheel; the first driving wheel is in transmission connection with the first driven wheel to drive the first driven wheel to rotate and drive the first switch to be closed or opened; the second driving wheel is in transmission connection with the second driven wheel to drive the second driven wheel to rotate and drive the second switch to be closed or opened.

[0013] Further, the first driving wheel, the second driving wheel, the first driven wheel and the second driven wheel are gears; the first driving wheel is in engagement with the first driven wheel, and the second driving wheel is in engagement with the second driven wheel; the second driving wheel is provided with a stroke groove in the inner hole, and the first driving wheel and / or the driving shaft is provided with a limiting protrusion corresponding to the stroke groove, and the limiting protrusion is rotationally fitted in the stroke groove.

[0014] Further, the first switch comprises a first movable contact, a first stationary contact and a first actuator, the first movable contact is in contact with or separated from the first stationary contact under the driving of the first actuator; the second switch comprises a second movable contact, a second stationary contact and a second actuator, the second movable contact is in contact with or separated from the second stationary contact under the driving of the second actuator; the driving mechanism further comprises a motor for driving the driving shaft to rotate; the driving mechanism further comprises a first energy storage assembly and a second energy storage assembly; the first driven wheel is in linkage with the first energy storage assembly to store energy through rotation, and the first energy storage assembly drives the first actuator to rotate through releasing the stored energy to make the first switch to be closed or opened; the second driven wheel is in linkage with the second energy storage assembly to store energy through rotation, and the second energy storage assembly drives the second actuator to rotate through releasing the stored energy to make the second switch to be closed or opened.

[0015] Further, the switch assembly includes a first auxiliary switch and a second auxiliary switch driven by the first actuating member, and a third auxiliary switch and a fourth auxiliary switch driven by the second actuating member, the first auxiliary switch and the third auxiliary switch are respectively used for controlling the running stop timing of the motor, the second auxiliary switch is used for indicating the opening and closing state of the first switch, and the fourth switch is used for indicating the opening and closing state of the second switch.

[0016] Further, the first actuating member includes a first contact support and a first cam coaxially connected, and the first energy storage assembly is arranged between the first driven wheel and the first cam; the first stationary contact is provided in two, and the first movable contact is arranged on the first contact support, and with the rotation of the first contact support, the two ends of the first movable contact are respectively in contact with or separated from the two first stationary contacts;

[0017] The second actuating member includes a second contact support and a second cam coaxially connected, and the second energy storage assembly is arranged between the second driven wheel and the second cam; the second stationary contact is provided in two, and the second movable contact is arranged on the second contact support, and with the rotation of the second contact support, the two ends of the second movable contact are respectively in contact with or separated from the two second stationary contacts;

[0018] The two second stationary contacts are respectively provided with pre-charging pins, and one of the second stationary contacts is integrally formed or electrically connected with one of the first stationary contacts, and constitutes a shared part; further comprising a heat sink connected to the shared part.

[0019] Further, an arc extinguishing assembly corresponding to the first stationary contact is further provided, the arc extinguishing assembly includes an arc extinguishing main body and an arc separation piece connected with the first actuating member, with the contact or separation of the first movable contact and the first stationary contact, the arc separation piece is located in an avoiding position or a separation position, and the arc separation piece physically separates the first movable contact and the first stationary contact in the separation position, and the arc separation piece avoids the first movable contact in the avoiding position; the arc extinguishing main body is located on the side of the arc separation piece away from the avoiding position in the separation position, and the arc separation piece moves to the separation position and pushes the arc to move to the arc extinguishing main body.

[0020] Further, the driving mechanism further includes a motor for driving the driving shaft to rotate, one end of the driving shaft can be driven to rotate by human power, and the driving mechanism further includes a control component for controlling whether the circuit in which the motor is located is conducted or not; the control component includes a control switch connected in series with the motor, the control switch is driven to be closed or opened by an operable control piece; further comprising a housing component, the first switch, the second switch and the driving mechanism are respectively arranged in the housing component; the housing component is provided with a first accommodation hole corresponding to one end of the driving shaft, and the housing component is provided with a second accommodation hole suitable for the operation of the control piece.

[0021] Further, the housing component is provided with two indicating members, one of which is used to indicate the opening and closing state of the first switch and is linked with the first switch, and the other is used to indicate the opening and closing state of the second switch and is linked with the second switch; the indicating member is provided with different first indicating marks corresponding to the closed state and the open state of the first switch or the second switch, respectively, and the housing component is provided with a first observation part corresponding to each indicating member, and each indicating member makes the corresponding first indicating mark enter the range of the first observation part with the switching of the opening and closing state of the first switch or the second switch.

[0022] Further, the control member is slidingly and / or rotatably arranged in the housing component, so that the control member is switched at different positions, the control member has a first position, a second position, when the control member is in the first position, the control member is blocked between one end of the driving shaft and the first clearance hole, and the control switch is closed; when the control member is in the second position, there is no blockage between one end of the driving shaft and the first clearance hole, and the control switch is open; the control member also has a third position, and when the control member is in the third position, the control member is blocked between one end of the driving shaft and the first clearance hole, and the control switch is open; the housing component is also provided with a locking member which can be pushed and pulled from the second clearance hole, the locking member is pulled out when the control member is in the third position, and limits the control member to switch to the first position or the second position.

[0023] Further, the control member is provided with different second indicating marks corresponding to each position, respectively, the housing component is provided with a second observation part, and the corresponding second indicating mark of the control member enters the second observation part when the control member is switched at different positions. The locking member is provided with a hanging hole for connecting a padlock.

[0024] Further, the motor is drivingly connected with the driving shaft through a gear transmission assembly, the gear transmission assembly includes a main gear arranged on the driving shaft; the control member is provided with a clamping block which clamps the main gear when the control member is in the third position.

[0025] Further, the branch is provided as two, the two branches are main positive branch and main negative branch, respectively; the pre-charging circuit is connected with a pre-charging resistor; the first switch is provided as two; the first switch and the second switch are closed in sequence or are opened in sequence.

[0026] The utility model discloses a kind of energy storage systems, including charge-discharge circuit, which includes main circuit and pre-charging circuit, and the main circuit includes at least two branches;It further includes the switch device as described in the utility model above, the second switch is connected in parallel with the pre-charging circuit, and it is connected in series with one of the first switches on the branch corresponding to the first switch;The rest of the first switches are respectively connected on the corresponding branch.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] 1、The switch device of the utility model includes the first switch, second switch, and the first switch and second switch are closed or opened in the set order, so that the switch device of the utility model can meet the basic control function of charge-discharge circuit, and the switch device of the utility model has fewer switches, so that the structure and control logic of the utility model are simpler, the overall structure is more compact, the occupied space is greatly reduced, and the cost is also greatly reduced. In particular, the first switch and the second switch are connected in series, the first switch is disconnected before the second switch, so that the second switch can not have arc extinguishing function, thereby the structure can be further simplified, and the overall volume and cost can be reduced.

[0029] 2、As a kind of preferred, each first switch linkage can detect fault with each other, avoid to produce security problem with fault operation, and make the switch device of the utility model only need to adopt a set of driving mechanism to drive each first switch and second switch action in step / time sequence, so that it is favorable to further simplify structure and reduce cost. In particular, the driving mechanism includes the driving shaft and motor, the large stroke characteristics of motor can be used to realize the large action stroke requirement of the first switch, so that the electrical distance of the first switch in the disconnected state can meet the specified safety isolation distance. The first driving wheel and the second driving wheel are ingeniously arranged on the driving shaft in the utility model, and the idle stroke is arranged between the second driving wheel and the driving shaft and / or the first driving wheel, the idle stroke is used to realize the closing or opening of the first switch and the second switch in sequence, so that the structure of the driving mechanism is relatively simple, and the stability and reliability of the driving mechanism can be ensured.

[0030] 3、The first energy storage component and the second energy storage component are arranged, so that the utility model can realize the instantaneousness of the first switch and the second switch in the moment of connection and disconnection, and avoid the adverse effects of long arc burning time caused by slow motor running speed.

[0031] 4、The arrangement of arc separation piece makes the electrical gap of the first switch of the utility model longer, and the overvoltage that the contact can withstand is improved, so that the safety of the system is greatly improved. The arc separation piece cooperates with the arc extinguishing main body, which can greatly improve the arc extinguishing effect of the first switch.

[0032] 5. The drive shaft can be manually driven, making this invention convenient for on-site inspection and maintenance. The control components allow for manual operation, enabling the motor to be locked to prevent accidental energization and ensuring safer and more reliable operation. Specifically, the control components have multiple positions and are further equipped with locking mechanisms, significantly improving the safety and reliability of this invention.

[0033] 6. The indicator design allows staff to clearly see the current open / closed status of the first and second switches on-site, thus providing a favorable guarantee for on-site maintenance.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the present invention is not limited to the embodiments. Attached Figure Description

[0035] Figure 1 This is a connection diagram of the switching device of this utility model;

[0036] Figure 2-1 This is an exploded view of the switching device of this utility model;

[0037] Figure 2-2 yes Figure 2-1 A magnified view of a portion of the image;

[0038] Figure 3 This is a three-dimensional structural diagram of the switching device of this utility model. Figure 1 (Reflecting on a local aspect)

[0039] Figure 4 This is a two-dimensional structural schematic diagram of the switching device of this utility model (showing a partial view);

[0040] Figure 5 This is a three-dimensional structural diagram of the switching device of this utility model. Figure 3 (Reflecting on a local aspect);

[0041] Figure 6 This is a three-dimensional structural diagram of the first switch and the first energy storage component of this utility model in their combined state. Figure 1 ;

[0042] Figure 7 This is a two-dimensional structural diagram of the first switch and the first energy storage component of this utility model in a combined state;

[0043] Figure 8 This is a three-dimensional structural diagram of the switching device of this utility model. Figure 4 (Reflecting on a local aspect);

[0044] Figure 9 is the three-dimensional structure schematic diagram of the switch device of the utility model Figure 5 (embodies the local part);

[0045] Figure 10 is the structure schematic diagram of the control piece clamping the main gear of the utility model

[0046] Figure 11 is the three-dimensional structure schematic diagram of the first indicating piece of the utility model

[0047] Figure 12 is the three-dimensional structure schematic diagram of the switch device of the utility model Figure 6 ;

[0048] Figure 13 is the three-dimensional structure schematic diagram of the switch device of the utility model Figure 7 ;

[0049] Figure 14 is the three-dimensional structure schematic diagram of the switch device of the utility model Figure 8 (embodies the local part);

[0050] Figure 15 is the three-dimensional structure schematic diagram of the arc separation piece of the utility model

[0051] Figure 16 is the three-dimensional structure schematic diagram of the switch device of the utility model Figure 9 (embodies the local part);

[0052] Figure 17 is the structure schematic diagram of the first switch and the second switch in the off state of the utility model

[0053] Figure 18 is the structure schematic diagram of the drive mechanism in the off state of the first switch and the second switch of the utility model

[0054] Figure 19 is the state schematic diagram of the drive mechanism in the closing process of the utility model Figure 1 ;

[0055] Figure 20 is the state schematic diagram two of the drive mechanism in the closing process of the utility model

[0056] Figure 21 is the state schematic diagram of the drive mechanism in the closing process of the utility model Figure 3 ;

[0057] Figure 22 is the state schematic diagram of the drive mechanism in the closing process of the utility model Figure 4 ;

[0058] Figure 23is the state diagram of the driving mechanism in the closing process of the utility model;

[0059] Figure 24 is the structure diagram of the first switch and the second switch in the closed state of the utility model;

[0060] Figure 25 is the state diagram of the driving mechanism in the closing process of the utility model Figure 1 ;

[0061] Figure 26 is the state diagram of the driving mechanism in the closing process of the utility model ;

[0062] Figure 27 is the state diagram of the driving mechanism in the closing process of the utility model Figure 3 ;

[0063] Figure 28 is the state diagram of the driving mechanism in the closing process of the utility model Figure 4 ;

[0064] In the figure, 1, first switch; 11, first moving contact part; 111, first contact support; 112, first moving contact; 113, first gear; 13, first cam; 14, cover plate; 131, second arc-shaped hole; 12, first stationary contact; 2, second switch; 21, second moving contact part; 211, first contact support; 212, second moving contact; 22, second stationary contact; 23, second cam; 24, pre-charge pin; 3, driving mechanism; 31, motor; 32, driving shaft; 321, limiting protrusion; 322, first operation hole; 33, first driving wheel; 34, second driving wheel; 341, stroke groove; 35, first driven wheel; 351, first arc-shaped hole; 36, second driven wheel; 37, first energy storage assembly; 371, energy storage driving wheel; 372, energy storage spring; 373, movable rod; 374, top rod; 375, support; 38, second energy storage assembly; 39, gear transmission assembly; 391, main gear; 4, arc extinguishing body; 41, arc extinguishing grid; 42, first permanent magnet; 43, second permanent magnet; 44, third permanent magnet; 5, arc isolation piece; 51, second gear; 52, opening; 6, heat sink; 7, switch assembly; 71, first auxiliary switch; 72, second auxiliary switch; 73, third auxiliary switch; 74, fourth auxiliary switch; 8, indicating piece; 81, rotating shaft; 82, indicating block; 83, first driving foot; 84, second driving foot; 85, torsional spring; 9, control component; 91, control switch; 92, control piece; 921, second operation hole; 93, locking piece; 931, hanging hole; 94, clamping block; 10, shell component; 101, first accommodation hole; 102, second accommodation hole; 103 / 104, observation hole; 105, control port; 106, exhaust hole; 107, heat dissipation hole; 20, operation handle; 30, main control board; 40, battery pack; 50, power inverter system. DETAILED DESCRIPTION

[0065] In the utility model, for the terms "first", "second" and the like are only used to distinguish similar objects, and are not used to describe specific order or sequence, and also can not be understood as indicating or implying relative importance. In the utility model, unless otherwise specified, "multiple" refers to two or more than two. "And / or", the association relationship of the associated object is described, which indicates that there can be three kinds of relationships, for example, A and / or B can indicate that A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the front and rear associated objects are in an "or" relationship.

[0066] Please see Figures 1-28As shown, the utility model relates to a switch device for the charge-discharge circuit of an energy storage system, which comprises a main circuit and a pre-charge circuit, the main circuit comprises at least two branches, and the current of the main circuit is a large current, and the current of the pre-charge circuit is a small current, the large current is a rated working current, which is usually greater than or equal to 100A, but is not limited to this, and the small current is less than the rated working current, which is usually less than 100A, but is not limited to this. The switch device of the utility model comprises:

[0067] The first switch 1 is arranged corresponding to each branch, and the first switch 1 is used for being connected to the corresponding branch;

[0068] The second switch 2 is used for being connected in parallel with the pre-charge circuit, and the second switch 2 is also used for being connected in series with one of the first switches 1 on the branch where the one of the first switches 1 is located;

[0069] The first switch 1 and the second switch 2 are closed or opened in a set order, specifically, the first switch 1 and the second switch 2 are closed or opened in turn, that is, when the switch device needs to be closed, the first switch 1 is closed first, and the second switch 2 is closed later; when the switch device needs to be opened, the first switch 1 is opened first, and the second switch is opened later.

[0070] Each first switch is arranged to be linked, so as to be closed or opened synchronously. The utility model further comprises a driving mechanism, which is connected to the first switch 1 and the second switch 2, so as to drive the first switch 1 and the second switch 2 to be closed or opened in a set order, that is, to drive the first switch 1 and the second switch 2 to be closed or opened in turn. The utility model further comprises a housing component 10, the first switch 1, the second switch 2 and the driving mechanism 3 are arranged in the housing component 10; the housing component 10 is specifically composed of a plurality of components, which are used as a support carrier of the first switch 1, the second switch 2 and the driving mechanism 3, and are used as an appearance part of the switch device. In the embodiment, as shown, Figure 1 The branch of the main circuit is provided with two, and the two branches are a main positive branch and a main negative branch, the main positive branch is a circuit connected between the positive electrode of the battery pack 40 of the energy storage system and the positive electrode of the power inversion system 50, and the main negative branch is a circuit connected between the negative electrode of the battery pack 40 and the negative electrode of the power inversion system 50; the pre-charge circuit is connected with a pre-charge resistor R1; the first switch 1 is provided with two, and one of the first switches 1 is connected with the driving mechanism 3. In other embodiments, the main circuit is an alternating current return flow, at this time, the branch thereof is provided with two or more than two.

[0071] The first switch 1 and the second switch 2 are respectively contact switches, the driving mechanism 3 comprises a driving shaft 32, a motor 31 for driving the driving shaft 32 to rotate, a first driving wheel 33 for driving the first switch 1 to open and close in linkage and a second driving wheel 34 for driving the second switch 2 to open and close in linkage, the first driving wheel 33 is coaxially fixed with the driving shaft 32, the second driving wheel 34 is sleeved outside the driving shaft 32 and is provided with an idle stroke between the first driving wheel 33 and / or the driving shaft 32, so that the driving shaft 32 controls the first driving wheel 33 and the second driving wheel 34 to rotate in time sequence, thereby realizing that the first switch 1 and the second switch 2 are closed or disconnected in sequence. Specifically, the inner hole of the second driving wheel 34 is provided with a stroke groove 341, the first driving wheel 33 and / or the driving shaft 32 is provided with a limiting protrusion 321 corresponding to the stroke groove 341, the limiting protrusion 321 is rotationally fitted in the stroke groove 341, and the idle stroke is realized by the movement of the limiting protrusion 321 between the two ends of the stroke groove 341 in the circumferential direction. In the embodiment, the stroke groove 341 is provided with two stroke grooves, which are oppositely arranged, but are not limited thereto.

[0072] The driving mechanism 3 further comprises a first driven wheel 35 and a second driven wheel 36, the first driving wheel 33 is in transmission connection with the first driven wheel 35 arranged on the first driven wheel 35, so that the first driven wheel 35 is driven to rotate and drive the first switch 1 to close or disconnect; the second driving wheel 34 is in transmission connection with the second driven wheel 36 arranged on the second driven wheel 36, so that the second driven wheel 36 is driven to rotate and drive the second switch 2 to close or disconnect. Specifically, in the embodiment, the first driving wheel 33, the second driving wheel 34, the first driven wheel 35 and the second driven wheel 36 are respectively gears, the first driving wheel 33 is engaged with the first driven wheel 35, and the second driving wheel 34 is engaged with the second driven wheel 36.

[0073] The driving mechanism 3 further comprises a first energy storage assembly 37 and a second energy storage assembly 38, the first driven wheel 35 drives the first energy storage assembly 37 to store energy through rotation, the first energy storage assembly 37 drives the first switch 1 to close or disconnect through release of the stored energy; the second driven wheel 36 drives the second energy storage assembly 38 to store energy through rotation, and the second energy storage assembly 38 drives the second switch 2 to close or disconnect through release of the stored energy. In this way, the momentary nature of the first switch 1 and the second switch 2 can be realized, and the adverse effects of long contact arc burning time caused by slow motor 31 running speed can be avoided.

[0074] The power source of the first energy storage assembly 37 and the second energy storage assembly 38 is the motor 31, and therefore, a motor with relatively large power is required, and the motor with large power is also large in size. Due to the space limitation, a reduction motor is designed by using the principle of the reduction gear. The reduction motor is provided with multiple gears for reduction, and the output torque is increased while the rotation speed of the last gear is ensured. Therefore, the motor 31 of the utility model is in transmission connection with the driving shaft 32 through the gear transmission assembly 39, and the gear transmission assembly 39 comprises a main gear 391 arranged on the driving shaft 32.

[0075] The first switch 1 comprises a first moving contact 112, a first stationary contact 12 and a first actuating member, the first moving contact 112 is in contact with or separated from the first stationary contact 12 under the driving of the first actuating member. The first moving contact 112 and the first actuating member combine to form a first moving contact part 11. The second switch comprises a second moving contact 212, a second stationary contact 22 and a second actuating member, the second moving contact 212 is in contact with or separated from the second stationary contact 22 under the driving of the second actuating member. The second moving contact 212 and the second actuating member combine to form a second moving contact part 21. The first energy storage assembly 37 is arranged between the first driven wheel 35 and the first actuating member, and an idle stroke is arranged between the first energy storage assembly 37 and the first driven wheel 35 and the first actuating member respectively; the first energy storage assembly 37 drives the first actuating member to rotate by releasing the stored energy, so as to close or open the first switch 1. The second energy storage assembly 38 is arranged between the second driven wheel 36 and the second actuating member, and an idle stroke is arranged between the second energy storage assembly 38 and the second driven wheel 36 and the second actuating member respectively, the second energy storage assembly 38 drives the second actuating member to rotate by releasing the stored energy, so as to close or open the second switch 2. In the embodiment, the first actuating member comprises a first contact support 111 fixed coaxially and a first cam 13, the first stationary contact 12 is provided with two, the first moving contact 112 is arranged on the first contact support 111, and the two ends of the first moving contact 112 are in contact with or separated from the two first stationary contacts 12 respectively with the rotation of the first contact support 111. The first cam 13 is located on the side of the first contact support 111 facing the first energy storage assembly 37, and therefore, the first energy storage assembly 37 is arranged between the first cam 13 and the first driven wheel 35.

[0076] The first moving contact 112 is provided with two, the two first moving contacts 112 are arranged side by side along the driving axis of the first contact support 111, and there is a gap between the two first moving contacts 112, and at least one first moving contact 112 is provided with a contact spring between the first contact support 111, the contact spring can make the two first moving contacts 112 clamp the two first stationary contacts 12.

[0077] The second actuating member comprises a coaxially fixed second contact support 211 and a second cam 23, two second fixed contacts 22 are arranged on the second contact support 211, and two second movable contacts 212 are arranged on the second contact support 211 and are in contact with or separated from the two second fixed contacts 22 as the second contact support 211 rotates. The second cam 13 is arranged on the side of the first contact support 111 facing the second energy storage assembly 38, and thus the second energy storage assembly 38 is arranged between the second cam 23 and the second driven wheel 36.

[0078] The two second fixed contacts 22 are respectively provided with pre-charging pins 24, as shown in Figure 14 , which are connected in parallel with the pre-charging circuit, and one of the second fixed contacts 22 is integrally formed or electrically connected with one of the first fixed contacts 12 to form a common fixed contact, so that the first switch 1 and the second switch 2 are connected in series. In this embodiment, one of the second fixed contacts 22 is integrally formed with one of the first fixed contacts 12 as an example, which is beneficial to reduce the cost and the volume. Similarly, the second movable contact part 21 is also provided with two second movable contacts 212.

[0079] As shown in Figure 6 , Figure 7 The first energy storage assembly 37 comprises an energy storage driving wheel 371 and at least one movable component, the movable component comprises an active rod 373, a top rod 374 and an energy storage spring 372, the energy storage driving wheel 371 is arranged between the first driven wheel 35 and the first cam, and the energy storage driving wheel 371, the first driven wheel 35 and the first cam 13 are arranged on the same axis, the first driven wheel 35 is provided with a first arc-shaped hole 351 concentrically arranged with the first driven wheel 35, the first cam 13 is provided with a second arc-shaped hole 131 concentrically arranged with the first cam 13, the top rod 374 is arranged on the energy storage driving wheel 371, one end of the top rod 374 is slidably connected to the first arc-shaped hole 351 of the first driven wheel 35, and the other end of the top rod 374 is slidably connected to the second arc-shaped hole 131 of the first cam 13; the active rod 373 is rotatably and slidably arranged on a support 375 arranged outside the energy storage driving wheel 371, one end of the active rod 373 is movably connected to the top rod 374, and the energy storage spring 372 is sleeved on the active rod 373 and is arranged between the top rod 374 and the support 375. In this embodiment, the movable component is provided with two movable components arranged on opposite sides of the energy storage driving wheel 371, and the first arc-shaped hole 351 and the second arc-shaped hole 131 are respectively provided with two arc-shaped holes. Thus, when the first driven wheel 35 rotates, the first driven wheel 35 can drive the energy storage driving wheel 371 to rotate, so that the energy storage spring 372 stores energy, and when the energy storage spring 372 releases the stored energy, the first cam 13 rotates, so that the first switch 1 is closed or opened, that is, the first movable contact part 11 is in contact with or separated from the fixed contact part.

[0080] Specifically, the detailed working process of the first energy storage assembly 37 is as follows:

[0081] When the first arc-shaped hole 351 on the first driven wheel 35 abuts against the top rod 374, the first driven wheel 35 drives the energy storage driving wheel 371 to rotate, so that the movable rod 373 is pushed to rotate and move outward of the energy storage driving wheel 371, and the energy storage spring 372 is compressed to store energy. Then, the first driven wheel 35 drives the energy storage driving wheel 371 to rotate by a small angle, until the movable rod 373 is rotated to the position where the energy storage spring 372 releases the stored energy. In this process, the top rod 374 slides along the second arc-shaped hole 131 of the first cam 13, and the first cam 13 remains in a stationary state. When the movable rod 373 is rotated to the position where the energy storage spring 372 releases the stored energy, the energy storage spring 372 on the movable rod 373 releases the stored energy, and pushes the energy storage driving wheel 371 to rotate rapidly in the closing direction of the first switch 1. The energy storage driving wheel 371 drives the first cam 13 to rotate, so as to realize the closing of the first switch 1. In the process of releasing the stored energy of the energy storage spring 372, the first driven wheel 35 continues to rotate, but the rotation speed of the first driven wheel 35 is slower than that of the energy storage driving wheel 371, and there is a certain idle stroke between them, so the rotation of the first driven wheel 35 does not interfere with the rotation of the energy storage driving wheel 371.

[0082] When the first arc-shaped hole 351 on the first driven wheel 35 abuts against the top rod 374, the first driven wheel 35 drives the energy storage driving wheel 371 to rotate, so that the movable rod 373 is pushed to rotate and move outward of the energy storage driving wheel 371, and the energy storage spring 372 is compressed to store energy. Then, the first driven wheel 35 drives the energy storage driving wheel 371 to rotate by a small angle, until the movable rod 373 is rotated to the position where the energy storage spring 372 releases the stored energy. In this process, the top rod 374 slides along the second arc-shaped hole 131 of the first cam 13, and the first cam 13 remains in a stationary state. When the movable rod 373 is rotated to the position where the energy storage spring 372 releases the stored energy, the energy storage spring 372 on the movable rod 373 releases the stored energy, and pushes the energy storage driving wheel 371 to rotate rapidly in the closing direction of the first switch 1. The energy storage driving wheel 371 drives the first cam 13 to rotate, so as to realize the closing of the first switch 1. In the process of releasing the stored energy of the energy storage spring 372, the first driven wheel 35 continues to rotate, but the rotation speed of the first driven wheel 35 is slower than that of the energy storage driving wheel 371, and there is a certain idle stroke between them, so the rotation of the first driven wheel 35 does not interfere with the rotation of the energy storage driving wheel 371.

[0083] As Figure 8As shown, the utility model also includes switch assembly 7, this switch assembly 7 includes with first switch 1 linkage's first auxiliary switch 71 and second auxiliary switch 72, and with second switch 2 linkage's third auxiliary switch 73 and fourth auxiliary switch 74, first auxiliary switch 71 and third auxiliary switch 73 respectively with motor 31 for controlling motor 31's operation stop timing, second auxiliary switch 72 is used to indicate the opening and closing state of first switch 1, and fourth auxiliary switch 74 is used to indicate the opening and closing state of second switch 2. In this embodiment, first auxiliary switch 71, second auxiliary switch 72, third auxiliary switch 73, fourth auxiliary switch 74 are respectively self-resetting microswitch, first auxiliary switch 71, second auxiliary switch 72 are driven by the first movable contact part 11 of first switch 1, and third auxiliary switch 73, fourth auxiliary switch 74 are driven by the second movable contact part 21 of second switch 2. Specifically, first auxiliary switch 71, second auxiliary switch 72 are driven by first cam 13, and third auxiliary switch 73, fourth auxiliary switch 74 are driven by second cam 23.

[0084] In this embodiment, two indicating members 8 are arranged in the housing member 10, one of the indicating members 8 is used to indicate the opening and closing state of the first switch 1 and is linked with the first switch 1, and the other indicating member 8 is used to indicate the opening and closing state of the second switch 2 and is linked with the second switch 2. The indicating member 8 is provided with different first indicating marks corresponding to the closed state and the open state of the first switch 1 / second switch 2, and the housing member 10 is provided with a first observation part corresponding to each indicating member 8, and each indicating member 8 is switched into the observation range of the corresponding first observation part with the switching of the opening and closing state of the first switch 1 or the second switch 2. The first observation part is specifically a first observation hole 103, as shown in the drawings, but is not limited thereto, and in other embodiments, the first observation hole 103 can be replaced by a transparent observation window. Figure 12 、 Figure 13 As shown, but not limited thereto, in other embodiments, the first observation hole 103 can be replaced by a transparent observation window.

[0085] As shown, but not limited thereto, in other embodiments, the first observation hole 103 can be replaced by a transparent observation window. Figure 11As shown, the indicating member 8 comprises a rotating shaft 81 and an indicating block 82, the axis of the rotating shaft 81 is parallel to the axis of the driving shaft 32, the indicating block 82 is arranged at one end of the rotating shaft 81 and close to the corresponding observation hole 104, and two different first indicating marks are arranged on the indicating block 82, with the rotating of the rotating shaft 81, one of the first indicating marks on the indicating block 82 enters the range of the first observation hole 104 to indicate the current on-off state of the first switch 1 or the second switch 2. The driving part is arranged at the other end of the rotating shaft 81, and the driving part of one of the indicating members 8 is linked with the first movable contact part 11 of the first switch 1 and is driven by the first cam 13, and the driving part of the other indicating member 8 is driven by the second cam 23. A reset member is arranged between the indicating member 8 and the housing part 10 to facilitate the automatic reset of the indicating member 8 after the release of the driving part of the indicating member 8. The reset member comprises an elastic member, which is specifically a torsion spring 85 sleeved on the rotating shaft 81, but is not limited thereto. The two indicating members 8 are made of the same mold, and in order to effectively drive the two indicating members 8, the driving part comprises a first driving leg 83 and a second driving leg 84, the first driving leg 83 and the second driving leg 84 respectively extend along the outside of the rotating shaft 81, and a included angle is formed between the first driving leg 83 and the second driving leg 84, so that the first driving leg 83 and the second driving leg 84 are approximately V-shaped, and specifically, the tail end of the first driving leg 83 is bent away from the second driving leg 84. The first driving leg 83 of one of the indicating members 8 is driven by the first cam 13, and the second driving leg 84 of the other indicating member 8 is driven by the second cam 23. In this way, the two indicating members 8 can be made of the same mold, which is conducive to reducing production cost. Moreover, since the tail end of the first driving leg 83 is bent away from the second driving leg 84, the first driving leg 83 and the second driving leg 84 can be effectively matched with the corresponding switch respectively under the condition that the included angle is relatively small, and interference does not occur, thereby facilitating the reduction of the occupied space.

[0086] As a preferred, one end of the driving shaft 32 can be driven to rotate by human power, and the driving mechanism 3 further comprises a control part 9 for controlling whether the circuit in which the motor 31 is arranged is turned on or not. The control part 9 specifically comprises a control switch 91 and a control member 92 connected in series with the motor 31, the control switch 91 is specifically a self-resetting micro switch and is driven to be closed or opened by the control member 92 which can be operated. For example, Figure 12 、 Figure 13As shown, the housing part 10 is provided with a first accommodating hole 101 corresponding to one end of the driving shaft 32, and the housing part 10 is provided with a second accommodating hole 102 suitable for the control member 92 to be operated. One end of the driving shaft 32 is located in the housing part 10 and is provided with a non-circular first operating hole 322. The utility model further comprises an operating handle 20 which can be accommodated in the housing part 10. The operating handle 20 is generally in the shape of L. One end of the operating handle 20 is used to pass through the first accommodating hole 101 and is inserted into the first operating hole 322 to drive the driving shaft 32 to rotate. In other embodiments, one end of the driving shaft 32 extends out of the first accommodating hole 101 of the housing part 10.

[0087] In the embodiment, the control member 92 has a main body structure in the shape of a long plate. The control member 92 is slidingly arranged in the housing part 10 so that the control member 92 is switched among different positions. The control member 92 has a first position, a second position and a third position. When the control member 92 is in the first position, the control member 92 blocks between one end of the driving shaft 32 and the first accommodating hole 101, and the control switch 91 is closed. When the control member 92 is in the second position, one end of the driving shaft 32 and the first accommodating hole 101 are not blocked. At this time, the through hole 921 arranged on the control member 92 is opposite to the driving shaft 32 and the first accommodating hole 101, and the control switch 91 is opened. When the control member 92 is in the third position, the control member 92 blocks between one end of the driving shaft 32 and the first accommodating hole 10, and the control switch 91 is opened. The housing part 10 is further provided with a locking member 93 which can be operated by being pushed and pulled from the second accommodating hole 102. When the control member 92 is in the third position, the locking member 93 is pulled out and limits the control member 92 to be switched to the first position or the second position. The locking member 93 is provided with a hanging hole 931 for connecting a padlock. Under the limiting of the padlock, the locking member 93 cannot be pushed into the housing part 10. The control member 92 is provided with a clamping block 94 which clamps the main gear 391 when the control member 92 is in the third position.

[0088] The control member 92 is provided with different second indicating marks corresponding to each position. The housing part 10 is provided with a second observation part. When the control member is switched among different positions, the corresponding second indicating mark enters the second observation part. The second observation part is specifically a second observation hole 104, as shown, but is not limited thereto. In other embodiments, the second observation hole 104 can be replaced by a transparent observation window. The first indicating mark and the second indicating mark can be realized by different colors or fonts, etc. Figure 12 、 Figure 13 As shown, but is not limited thereto. In other embodiments, the second observation hole 104 can be replaced by a transparent observation window. The first indicating mark and the second indicating mark can be realized by different colors or fonts, etc.

[0089] The first switch 1 is provided with an arc extinguishing assembly, the arc extinguishing assembly comprises an arc extinguishing main body 4 and an arc separating piece 5 which is arranged in linkage with the first actuator, and the arc separating piece 5 is located in a avoiding position or a separating position along with the contact or separation of the first moving contact 112 and the first stationary contact 12, the arc separating piece 5 physically separates the first moving contact 112 and the first stationary contact 12 in the separating position, and the arc separating piece 5 avoids the first moving contact 112 in the avoiding position; the arc extinguishing main body 4 is located on the side of the arc separating piece 5 which is away from the avoiding position in the separating position, and the arc separating piece 5 drives the arc to move to the arc extinguishing main body 4 when moving to the separating position. The arc extinguishing assembly is provided with two, and the two arc extinguishing assemblies correspond to the two first stationary contacts 12 one by one. The first moving contact part 11 is in transmission connection with the arc separating piece 5 through a toothed transmission structure, specifically, the toothed transmission structure comprises a first gear 113 arranged on the first contact support 111 and a second gear 51 arranged on the arc separating piece 5, and the first gear 113 is in meshing connection with the second gear 51.

[0090] As shown in Figure 14 , the arc extinguishing main body 4 comprises a plurality of arc extinguishing fins 41 which are distributed at intervals along the rotating direction of the arc separating piece 5, and the side of the arc extinguishing main body 4 which faces the arc separating piece 5 is arranged in an arc shape along the rotating direction of the arc separating piece 5. The side of the arc extinguishing main body 4 which is opposite to the arc separating piece 5 and the two sides of the arc extinguishing main body 4 in the axial direction of the arc separating piece 5 are respectively provided with positions where optional permanent magnets can be arranged, so as to realize non-polarity magnetic blowing. Specifically, the side of the arc extinguishing main body 4 which is opposite to the arc separating piece 5 is provided with a first permanent magnet 42, one side of the arc extinguishing main body 4 in the axial direction of the arc separating piece 5 is provided with a second permanent magnet 43, and the other side of the arc extinguishing main body 4 in the axial direction of the arc separating piece 5 is provided with a third permanent magnet 44, the magnetic pole of the first permanent magnet 42 which faces the inside of the arc extinguishing main body 4 and the magnetic pole of the second permanent magnet 43 which faces the inside of the arc extinguishing main body 4 are opposite poles, and the magnetic pole of the third permanent magnet 44 which faces the inside of the arc extinguishing main body 4 and the magnetic pole of the second permanent magnet 43 which faces the inside of the arc extinguishing main body 4 are same poles. The shell part 10 is provided with an exhaust port 106 which leads to the outside, and the exhaust port 106 is located on the side of the arc extinguishing main body 4 which is opposite to the arc separating piece 5, as shown in Figure 16 , for increasing the pressure gradient and forming high-pressure gas blowing.

[0091] As shown in Figure 15As shown, the arc separation piece 5 is a hollow cover structure, and in the arc separation position, it covers the part of the first static contact 12 for cooperating with the first moving contact 112, and its appearance is roughly a sector, and the two sides of the central angle of which are closed and open respectively, so as to facilitate the first static contact 12 to enter and exit the arc separation piece 5. During the disconnection of the first switch 1, the arc separation piece 5 rotates synchronously, gradually separates the first moving contact 112 from the first static contact 12, and simultaneously pushes the arc between the contacts to move in the direction of the arc extinguishing main body 4, cuts the arc into a short arc, and helps to quickly extinguish the arc. The arc separation piece 5 can use a gas generating material, which includes one of nylon, POM plastic and the like, and the generated gas can more easily push the arc to move quickly. In order to avoid the unextinguished arc from conducting with the adjacent first static contact 12 after the first switch 1 is completely disconnected, a cover plate 14 is added to the first static contact 12, thereby increasing the arc path.

[0092] In the embodiment, as shown in the drawings, the shell part 10 is provided with a plurality of first static contacts 12 and a plurality of second static contacts 22, and the first static contacts 12 and the second static contacts 22 are arranged in parallel and are connected to the first switch 1 and the second switch 2 respectively. Figure 14 As shown, the shell part 10 is further provided with a heat sink 6 for dissipating heat of the first switch 1 and / or the second switch 2, and the shell part 10 is provided with heat dissipation holes 107. Since the static contact points shared by the first switch 1 and the second switch 2 are more, the load current passing through is larger, and the heat generated at the intermediate connection is larger, therefore, the shared static contacts of the first switch 1 and the second switch 2 are connected to the heat sink 6 by riveting or welding, and the heat generated by the shared static contacts is dissipated to the internal space of the shell part 10 through the heat sink 6, so that the heat of the shared static contacts is reduced, and the situation that the contacts are overheated and oxidized, and the heat is transmitted to the external terminals is avoided, thereby greatly improving the service life of the product. The shell part 10 is provided with a plurality of heat dissipation holes 107, so that the heat dissipated by the heat sink 6 can be promptly discharged to the outside, thereby improving the heat dissipation effect of the heat sink 6.

[0093] In the embodiment, the shell part 10 is further provided with a main control board 30, and the main control board 30 is electrically connected with a motor 31 to control whether the motor 31 operates or not. The first auxiliary switch 71 and the third auxiliary switch 73 are respectively electrically connected with the main control board 30 to send electric signals to the main control board 30, and the main control board 30 controls whether the motor 31 is allowed to stop or not. The shell part 10 is provided with a control port 105 corresponding to the main control board 30, so that the main control board 30 is electrically connected with a control system of an energy storage system through the control port 105.

[0094] The switch device of the utility model, when using, another first static contact 12 of one first switch 1, another second static contact 22 of second switch 2 are connected on main positive branch, two first static contacts 12 of another first switch 1 are connected on main negative branch, two pre-charging pins 24 of second switch 2 are connected on both ends of pre-charging circuit respectively.

[0095] The initial state of the utility model is shown in Figure 17 , Figure 18 At this time, the first moving contact 112 is separated from the two first static contacts 12, the second moving contact 212 is separated from the two second static contacts 22, and the arc separation piece 5 is shielded between the first moving contact 112 and the first static contact 12.

[0096] When the main circuit needs to be closed, the motor 31 is started, the motor 31 drives the driving shaft 32 and the first driving wheel 33 to rotate in the direction of closing the first switch 1 through the gear transmission assembly 39, the first driving wheel 33 drives the first driven wheel 35 to rotate in the direction of closing the first switch 1, and the first energy storage assembly 37 gradually stores energy, as shown in Figure 19 In this process, the second driving wheel 34 does not rotate because there is an idle stroke between the second driving wheel 34 and the first driving wheel 33.

[0097] When the energy storage spring 372 of the first energy storage assembly 37 reaches the dead point position (i.e. the position where the energy storage spring 372 is about to release energy), the first driving wheel 33 also completes the idle stroke relative to the second driving wheel 34, so that the limiting protrusion 321 abuts against one end of the stroke groove 341 of the second driving wheel 34 in the circumferential direction, as shown in Figure 20 With the continuous rotation of the first driving wheel 33, the energy storage spring 372 of the first energy storage assembly 37 releases energy, driving the first moving contact part 11 to rotate rapidly until the two ends of the first moving contact 112 are in contact with the two first static contacts 12 respectively, so that the first switch 1 is closed; in the rotation process of the first moving contact part 11, the arc separation piece 5 rotates reversely, so that the part of the first static contact 12 for cooperating with the first moving contact 112 is exposed to facilitate contact with the first moving contact 112, as shown in Figure 21 In this process, the second driving wheel 34 also rotates under the driving of the first driving wheel 33, so that the second energy storage assembly 38 gradually stores energy, but the rotation amount of the second driving wheel 34 is not enough to make the energy storage spring of the second energy storage assembly 38 reach the dead point position. After the first switch 1 is closed, the motor 31 stops running, so that the driving shaft 32 and the first driving wheel 33 and the second driving wheel 34 thereon stop rotating.

[0098] After the first switch 1 is closed, the pre-charge circuit is turned on, and the pre-charge circuit charges the capacitive or similar capacitive load through the pre-charge resistor R1. When the current decreases to a certain extent, the battery management system detects that the voltage difference of the battery pack reaches balance, and the motor 31 is operated again to drive the driving wheel and the first driving wheel 33 and the second driving wheel 34 thereon to continue rotating in the direction of closing the first switch 1 until the energy storage spring of the second energy storage assembly 38 reaches the dead point position, as shown in Figure 22As the second driving wheel 34 continues to rotate, the energy storage spring of the second energy storage assembly 38 releases the stored energy, driving the second movable contact part 21 to rotate rapidly until the two ends of the second movable contact 212 are in contact with the two second stationary contacts 22 respectively, making the second switch 2 closed, as shown in Figure 23 、 Figure 24 Thus the pre-charge circuit is short-circuited and the main circuit enters the normal working state. During this process, since there is a free stroke between the first driving wheel 33 and the first energy storage assembly 37, the rotation of the first driving wheel 33 does not affect the state of the first switch 1, i.e. the first switch 1 remains closed.

[0099] When it is necessary to break the main circuit, the starting motor 31 is started, and the motor 31 drives the driving shaft 32 and the first driving wheel 33 to rotate in the direction of making the first switch 1 open through the gear transmission assembly 39, and the first driving wheel 33 drives the first driven wheel 35 to rotate in the direction of making the first switch 1 open, making the first energy storage assembly 37 gradually store energy, as shown in Figure 25 During this process, since there is a free stroke between the second driving wheel 34 and the first driving wheel 33, the second driving wheel 34 does not rotate.

[0100] When the energy storage spring 372 of the first energy storage assembly 37 reaches the dead point position, the first driving wheel 33 also completes the free stroke relative to the second driving wheel 34, making the limiting protrusion 321 abut against the end of the stroke groove 341 of the second driving wheel 34 in the circumferential direction, as shown in Figure 26 As the first driving wheel 33 continues to rotate, the energy storage spring 372 of the first energy storage assembly 37 releases the stored energy, driving the first movable contact part 11 to rotate rapidly until the two ends of the first movable contact 112 are separated from the two first stationary contacts 12 respectively, making the first switch 1 open, thus breaking the main circuit. During the rotation of the first movable contact part 11, the arc separation piece 5 rotates reversely until the first stationary contact 12 is separated from the first movable contact 112, as shown in Figure 27 During this process, the second driving wheel 34 also rotates under the driving of the first driving wheel 33, making the second energy storage assembly 38 gradually store energy, but the rotation amount of the second driving wheel 34 is not enough to make the energy storage spring of the second energy storage assembly 38 reach the dead point position.

[0101] When the energy storage spring of the second energy storage assembly 38 reaches the dead point position, as shown in Figure 28 As the second driving wheel 34 continues to rotate, the energy storage spring of the second energy storage assembly 38 releases the stored energy, driving the second movable contact part 21 to rotate rapidly until the two ends of the second movable contact 212 are separated from the two second stationary contacts 22 respectively, making the second switch 2 open, thus canceling the short-circuit of the pre-charge circuit. At this time, the whole switch device returns to the state as shown in Figure 17 、 Figure 18The initial state is shown. In this process, since the first driving wheel 33 has a free stroke with the first energy storage assembly 37, the rotation of the first driving wheel 33 does not affect the state of the first switch 1, that is, the first switch 1 remains in an open state.

[0102] Therefore, compared with the prior art, the switch device of the utility model meets the control function of the charge-discharge circuit of the energy storage system, has less devices, simpler structure and control logic, lower cost, and reduces the occupied space.

[0103] The utility model discloses an energy storage system, including charge-discharge circuit, this charge-discharge circuit includes main circuit and precharge circuit, and the main circuit includes at least two branches, still include the switch device of above-mentioned utility model, and the second switch 2 is connected in parallel with precharge circuit, and with one of first switch 1 series connection is connected in one of first switch 1 corresponding branch on the branch of the corresponding branch of one of first switch 1;The rest first switch 1 is connected on the corresponding branch respectively. Figure 1 As shown in the drawing, the branch of the main circuit is provided with two, and the two branches are main positive branch and main negative branch respectively, and the precharge resistor R1 is connected on the precharge circuit;The first switch 1 is provided with two.

[0104] The structure and working principle of the switch device are described in the foregoing description, and will not be repeated here.

[0105] The switch device and the energy storage system of the utility model are not involved in the prior art or can be realized by using the prior art.

[0106] The above-mentioned embodiments are only used to further illustrate the switch device and the energy storage system of the utility model, but the utility model is not limited to the embodiments, and any simple modification, equivalent change and modification according to the technical essence of the utility model of the above-mentioned embodiments all fall within the protection scope of the technical scheme of the utility model.

Claims

1. A switching device for a charging and discharging circuit, the charging and discharging circuit comprising a main circuit and a pre-charging circuit, the main circuit comprising at least two branches; characterized in that: include: A first switch is provided for each branch, and the first switch is used to connect to the corresponding branch. The second switch is used to be connected in parallel with the pre-charging circuit, and the second switch is also used to be connected in series with one of the first switches on the branch where one of the first switches is located; The first switch and the second switch are closed or opened in a predetermined sequence.

2. The switching device according to claim 1, characterized in that: Each of the first switches is linked to be closed or opened synchronously; it also includes a drive mechanism connected to the first and second switches to drive the first and second switches to close or open in a set sequence.

3. The switching device according to claim 2, characterized in that: The drive mechanism includes a drive shaft, a first drive wheel for linking the opening and closing of a first switch, and a second drive wheel for linking the opening and closing of a second switch. The first drive wheel is coaxially fixed with the drive shaft, and the second drive wheel is sleeved outside the drive shaft and has a free stroke between it and the first drive wheel and / or the drive shaft, so that the drive shaft controls the rotation of the first drive wheel and the second drive wheel in a time sequence.

4. The switching device according to claim 3, characterized in that: The driving mechanism further includes a first driven wheel and a second driven wheel. The first driving wheel is drivenly connected to the first driven wheel so that the first driven wheel rotates and drives the first switch to close or open. The second driving wheel is drivenly connected to the second driven wheel so that the second driven wheel rotates and drives the second switch to close or open.

5. The switching device according to claim 4, characterized in that: The first driving wheel, the second driving wheel, the first driven wheel, and the second driven wheel are all gears. The first driving wheel meshes with the first driven wheel, and the second driving wheel meshes with the second driven wheel. The inner hole of the second driving wheel is provided with a stroke groove, and the first driving wheel and / or the driving shaft are provided with a limiting protrusion corresponding to the stroke groove. The limiting protrusion is rotatably engaged in the stroke groove.

6. The switching device according to claim 4, characterized in that: The first switch includes a first moving contact, a first stationary contact, and a first actuator. The first moving contact contacts or separates from the first stationary contact under the drive of the first actuator. The second switch includes a second moving contact, a second stationary contact, and a second actuator. The second moving contact contacts or separates from the second stationary contact under the drive of the second actuator. The drive mechanism further includes a motor for driving the drive shaft to rotate. The drive mechanism also includes a first energy storage component and a second energy storage component. The first driven wheel stores energy by rotating in conjunction with the first energy storage component. The first energy storage component releases the stored energy to drive the first actuator to rotate, thereby closing or opening the first switch. The second driven wheel stores energy by rotating in conjunction with the second energy storage component. The second energy storage component releases the stored energy to drive the second actuator to rotate, thereby closing or opening the second switch.

7. The switching device according to claim 6, characterized in that: It also includes a switching assembly, which includes a first auxiliary switch and a second auxiliary switch driven by the first actuator, and a third auxiliary switch and a fourth auxiliary switch driven by the second actuator. The first auxiliary switch and the third auxiliary switch are used to control the timing of the motor's operation and stop, respectively. The second auxiliary switch is used to indicate the open and closed state of the first switch, and the fourth switch is used to indicate the open and closed state of the second switch.

8. The switching device according to claim 6 or 7, characterized in that: The first actuator includes a first contact support and a first cam fixed coaxially, and the first energy storage component is disposed between the first driven wheel and the first cam; there are two first stationary contacts, and the first moving contact is disposed on the first contact support. As the first contact support rotates, the two ends of the first moving contact respectively contact or separate from the two first stationary contacts. The second actuator includes a second contact support and a second cam fixed coaxially, and the second energy storage component is disposed between the second driven wheel and the second cam; there are two second stationary contacts and a second moving contact is disposed on the second contact support. As the second contact support rotates, the two ends of the second moving contact respectively contact or separate from the two second stationary contacts. The two second stationary contacts are each provided with a pre-charge pin, and one of the second stationary contacts is integrally formed or electrically connected to one of the first stationary contacts, forming a common part; it also includes a heat sink, which is connected to the common part.

9. The switching device according to claim 6, characterized in that: It also includes an arc-extinguishing component corresponding to the first stationary contact. The arc-extinguishing component includes an arc-extinguishing body and an arc-isolating component linked with the first actuator. As the first moving contact contacts or separates from the first stationary contact, the arc-isolating component is located in a clearance position or a separation position. In the separation position, the arc-isolating component physically separates the first moving contact from the first stationary contact. In the clearance position, the arc-isolating component avoids the first moving contact. The arc-extinguishing body is located on the side of the arc-isolating component away from the clearance position in the separation position. When the arc-isolating component moves towards the separation position, it pushes the arc towards the arc-extinguishing body.

10. The switching device according to claim 3, characterized in that: The drive mechanism further includes a motor for driving the drive shaft to rotate. One end of the drive shaft can be manually driven to rotate. The drive mechanism also includes a control component for controlling whether the circuit containing the motor is connected or not. The control component includes a control switch connected in series with the motor. The control switch is driven to close or open by an operable control element. The mechanism also includes a housing component. The first switch, the second switch, and the drive mechanism are respectively disposed in the housing component. The housing component has a first clearance hole corresponding to one end of the drive shaft, and the housing component has a second clearance hole suitable for the control element to be operated.

11. The switching device according to claim 10, characterized in that: The housing component is provided with two indicators. One indicator is used to indicate the open / closed state of the first switch and is linked with the first switch. The other indicator is used to indicate the open / closed state of the second switch and is linked with the second switch. The indicators are provided with different first indicator marks corresponding to the closed and open states of the first or second switch. The housing component is provided with a first observation part for each indicator. As the open / closed state of the first or second switch changes, the corresponding first indicator mark of each indicator enters the range of the first observation part.

12. The switching device according to claim 10, characterized in that: The control component is slidably and / or rotatably disposed within the housing component, allowing the control component to switch between different positions. The control component has a first position and a second position. In the first position, the control component is obstructed between one end of the drive shaft and the first clearance hole, and the control switch is closed. In the second position, there is no obstruction between one end of the drive shaft and the first clearance hole, and the control switch is open. The control component also has a third position, in which the control component is obstructed between one end of the drive shaft and the first clearance hole, and the control switch is open. The housing component is also provided with a locking component that can be pushed and pulled from the second clearance hole. When the control component is in the third position, the locking component is pulled out, restricting the control component from switching to the first or second position.

13. The switching device according to claim 12, characterized in that: The control component is provided with different second indicator marks for each of its positions, and the housing component is provided with a second observation part. When the control component is switched to different positions, its corresponding second indicator mark enters the second observation part; the locking component is provided with a hanging hole for connecting a padlock.

14. The switching device according to claim 12, characterized in that: The motor is connected to the drive shaft via a gear transmission assembly, which includes a main gear on the drive shaft; the control component is provided with a locking block, which locks the main gear in the third position.

15. The switching device according to claim 1, characterized in that: The branch circuit is configured as two, namely a main positive branch circuit and a main negative branch circuit; a pre-charging resistor is connected to the pre-charging circuit; there are two first switches; the first switch and the second switch are closed or opened sequentially.

16. An energy storage system, comprising a charging and discharging circuit, the charging and discharging circuit including a main circuit and a pre-charging circuit, the main circuit including at least two branches; characterized in that: It also includes a switching device as described in any one of claims 1-15, wherein the second switch is connected in parallel with the pre-charging circuit and is connected in series with one of the first switches on the branch corresponding to the one of the first switches; the remaining first switches are respectively connected on their respective branches.

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