Contactor and device for switching series-parallel connection of battery pack

Abstract

The invention discloses a contactor and a device for switching series-parallel connection of a battery pack, the contactor comprises a switching mechanism and a driving mechanism, the switching mechanism is provided with static contact pieces with static contacts and moving contact pieces with moving contacts, the total number of the static contact pieces and the moving contact pieces is four or five, the number of the moving contact pieces is not less than two, and the moving contact pieces are connected with each other. At least one of the moving contact pieces is configured to be at least two moving contacts which are arranged on the moving contact piece at the same time so as to be switched to be connected with different static contacts and / or moving contacts; the driving mechanism drives the moving contact to move so as to enable the contactor to realize switching, so that switching of series connection and parallel connection of an external circuit is realized, namely hierarchical control of the external circuit is realized, the overall operation efficiency of a product is improved, and the overall size and the production cost of the product are reduced. The device comprises a plurality of battery packs and contactors connected with the plurality of battery packs, so as to realize the switching function of series-parallel connection of circuits in the battery packs and further realize the conversion among different voltage values.

Description

Technical Field

[0001] The present invention relates to the technical field of contactors, and in particular to a contactor capable of implementing hierarchical control of application products and a device for switching battery packs in series and parallel using the contactor. Background Art

[0002] As the market places increasing demands on the range and charging speeds of new energy vehicles, major automakers have begun developing voltage platforms of 800V and even higher. However, due to the slow adoption of 800V charging systems, the market is shifting towards developing electrical architectures and battery packs that enable switching between 400V and 800V (i.e., charging at 800V and discharging at 400V, or vice versa).

[0003] Currently, the market uses three contactors to connect battery packs in series and parallel to achieve voltage switching between 400V and 800V. However, the use of more contactors results in a larger overall electrical architecture, higher costs, and lower installation efficiency, which fails to meet market demand. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a contactor and a device for switching battery packs in series and parallel. The contactor has a simple, reasonable and novel structure, can realize hierarchical control of application products, improve the overall operating efficiency of application products, reduce the overall volume and production cost of application products, and well meet market demand.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a contactor, comprising:

[0006] A conversion mechanism, comprising a stationary contact having a stationary contact and a moving contact having a moving contact; the total number of the stationary contacts and the moving contacts is four or five, the number of the moving contacts is not less than two and they are connected to each other, and at least one of the moving contacts is configured such that at least two moving contacts are simultaneously provided on the moving contact for switching connections with different stationary contacts and / or moving contacts;

[0007] The driving mechanism is used to drive the movable contact to move so that the contactor can be switched, thereby realizing the switching between series and parallel connection of the external circuit.

[0008] As a further improvement of the present invention, the static contact comprises the static contact and a first conductive member connected to the static contact; the dynamic contact comprises the dynamic contact and a second conductive member connected to the dynamic contact; and the dynamic contact moves with the second conductive member.

[0009] As a further improvement of the present invention, the contactor includes two static contacts and two moving contacts, and the two static contacts are spaced apart from the two moving contacts; the two static contacts and the two moving contacts are electrically connected respectively, and the external circuit is switched to a parallel circuit; the driving mechanism drives the moving contact to move so that the static contact and the moving contact located in the middle are electrically connected, and the static contact and the moving contact located on both sides are in an open circuit state, and the external circuit is switched to a series circuit.

[0010] As a further improvement of the present invention, one of the static contacts and one of the dynamic contacts are respectively configured as at least two static contacts and two dynamic contacts, and the other static contact and the other dynamic contact are respectively configured as one static contact and one dynamic contact, and the static contact with two static contacts and the dynamic contact with two dynamic contacts are arranged adjacent to and located in the middle position.

[0011] As a further improvement of the present invention, the contactor is used to control the battery pack, wherein the positive and negative poles of one group of the battery packs are electrically connected to the two static contacts respectively, and the positive and negative poles of another group of the battery packs are electrically connected to the two moving contacts respectively.

[0012] As a further improvement of the present invention, the contactor includes two moving contacts and two static contacts, and the two moving contacts are arranged between the two static contacts; the moving contacts are electrically connected to their corresponding static contacts, and the external circuit is switched to a parallel circuit; the driving mechanism drives the moving contacts to move, so that the two moving contacts are electrically connected, and the two static contacts are in an open-circuit state, and the external circuit is switched to a series circuit.

[0013] As a further improvement of the present invention, the movable contact is configured as at least two movable contacts, and the stationary contact is configured with at least one stationary contact facing the direction of the corresponding movable contact.

[0014] As a further improvement of the present invention, the contactor is used to control the battery pack, and the positive and negative poles of the two groups of battery packs are electrically connected to one of the static contact and the moving contact, respectively, wherein the positive pole of one group of battery packs is electrically connected to one of the static contact, and the negative pole is electrically connected to the moving contact; the positive pole of the other group of battery packs is electrically connected to the moving contact, and the negative pole is electrically connected to the static contact.

[0015] As a further improvement of the present invention, the contactor includes three static contacts and two moving contacts, and the two moving contacts are spaced apart between the three static contacts; the two moving contacts are electrically connected to the two adjacent static contacts respectively, and when one static contact is in an off-circuit state, the external circuit is switched to a parallel circuit; when the driving mechanism drives the moving contact to move so that the moving contact is electrically connected to the static contact that is in an off-circuit state when in parallel, the other moving contact and the other two static contacts are all in an off-circuit state, and the external circuit is switched to a series circuit.

[0016] As a further improvement of the present invention, one of the two moving contacts is configured so that at least two moving contacts are simultaneously provided on one second conductive member for switching connections with different static contacts; the other moving contact and the three static contacts are respectively configured with one moving contact and one static contact facing the direction of the corresponding moving contacts.

[0017] As a further improvement of the present invention, the contactor is used to control the battery pack, and the static contact and the moving contact are electrically connected to two groups of battery packs respectively; the three static contacts are electrically connected to the positive and negative poles of one group of battery packs; and the two moving contacts are electrically connected to the positive and negative poles of another group of battery packs.

[0018] As a further improvement of the present invention, the contactor further includes a connecting structure connected to the movable contact, and the driving mechanism is electromagnetically driven, and the driving mechanism electromagnetically drives the connecting structure to move to drive the movable contact to move.

[0019] As a further improvement of the present invention, the contactor is a monostable contactor or a bistable contactor, and the bistable contactor includes a magnetic holding structure or a mechanical holding structure or a structure combining mechanical and magnetic holding.

[0020] The present invention also provides a device for switching battery packs in series and parallel, comprising multiple battery packs and a contactor connected to the present invention to realize the series and parallel switching function of the circuit in the battery pack, and can realize the conversion between different voltage values according to the series and parallel switching of the static contact and the moving contact in the contactor.

[0021] The beneficial effects of the present invention are as follows: Compared with the existing technology, ① the contactor of the present invention can achieve hierarchical control of application products, thereby improving the overall operating efficiency of the application products, greatly reducing the overall volume and production cost of the application products, and well meeting market demand. ② The contactor of the present invention is applicable to a variety of product types and has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a structural schematic diagram of the contactor according to Example 1 of the present invention in the first working mode (realizing parallel connection of external circuits);

[0023] Figure 2 This is a structural schematic diagram of the contactor according to Example 1 of the present invention in the second working mode (realizing series connection of external circuits);

[0024] Figure 3 This is a structural diagram of the contactor according to Example 2 of the present invention in the first working mode (realizing parallel connection of external circuits);

[0025] Figure 4 This is a structural schematic diagram of the contactor according to Example 2 of the present invention in the second working mode (realizing series connection of external circuits);

[0026] Figure 5 This is a structural diagram of the contactor according to Example 3 of the present invention in the first working mode (realizing parallel connection of external circuits);

[0027] Figure 6 This is a schematic structural diagram of the contactor according to Example 3 of the present invention in the second working mode (realizing series connection of external circuits);

[0028] Figure 7 This is a schematic structural diagram of the device for switching between series and parallel connection of battery packs according to Embodiment 4 of the present invention in a first working mode (two battery packs in parallel);

[0029] Figure 8 This is a schematic structural diagram of the device for switching between series and parallel connection of battery packs according to Embodiment 4 of the present invention in the second working mode (two battery packs connected in series);

[0030] Figure 9 This is a schematic structural diagram of the device for switching between series and parallel connection of battery packs according to Embodiment 5 of the present invention in a first working mode (two battery packs in parallel);

[0031] Figure 10 This is a structural diagram of the device for switching between series and parallel connection of battery packs according to Example 5 of the present invention in the second working mode (two battery packs connected in series);

[0032] Figure 11 This is a schematic structural diagram of the device for switching between series and parallel connection of battery packs according to Example 6 of the present invention in a first working mode (two battery packs in parallel);

[0033] Figure 12 This is a structural diagram of the device for switching between series and parallel connection of battery packs described in Example 6 of the present invention in the second working mode (two battery packs are connected in series).

[0034] The following description is made with reference to the accompanying drawings:

[0035] 1. Conversion mechanism; 10a, first static contact; 100a, static contact A; 101a, first conductive member A; 10b, second static contact; 100b, static contact B; 101b, first conductive member B; 10c, third static contact; 100c, static contact C; 101c, first conductive member C; 11a, moving contact A; 110a, moving contact A; 111a, second conductive member A; 11b, moving contact B; 110b, moving contact B; 111b, second conductive member B; 10d, fourth static contact; 100d, static contact D; 101d, first conductive member D; 10e, fifth static contact; 100e, static contact E; 101e, first conductive part E; 11c, moving contact C; 110c, moving contact C; 111c, second conductive part C; 11d, moving contact D; 110d, moving contact D; 111d, second conductive part D; 10f, sixth static contact; 100f, static contact F; 101f, first conductive part F; 10g, seventh static contact; 100g, static contact G; 101g, first conductive part G; 11e, moving contact E; 110e, moving contact E; 111e, second conductive part E; 11f, moving contact F; 110f, moving contact F; 111f, second conductive part F; 2. Driving mechanism; 3. Battery pack. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "up", "down", "right", etc., such as directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0040] In addition, the prefixes "first", "second", etc. in the component names (such as the first static contact, the second static contact, etc.), and the suffixes "A", "B", etc. in the component names (such as the moving contact A, the moving contact B, etc.) are only for the convenience of description and are not used to limit the scope of the implementation of the patent of this invention.

[0041] Example 1:

[0042] Please see the attached Figure 1 and attached Figure 2 As shown, this embodiment 1 provides a contactor with an optimized structure, which can realize hierarchical control of application products, such as hierarchical control of the power supply voltage of the battery pack module; thereby improving the overall operating efficiency of the application product, greatly reducing the overall volume and production cost of the application product, and well meeting market demand.

[0043] Please continue to refer to the attached Figure 1 and attached Figure 2 As shown, the contactor described in this embodiment 1 mainly includes a conversion mechanism 1 and a drive mechanism 2. The conversion mechanism 1 is provided with a static contactor having a static contact and a dynamic contactor having a dynamic contactor. The total number of the static contacts and the dynamic contacts is four or five. The number of the dynamic contacts is not less than two and they are interconnected. At least one of the dynamic contacts is configured so that at least two dynamic contacts are simultaneously provided on the dynamic contactor for switching connections with different static contacts and / or dynamic contacts. The drive mechanism 2 is used to drive the dynamic contactor to move so that the contactor can switch, thereby realizing the switching of the external circuit in series and in parallel. It can be understood that when the contactor is applied to an application product, the contactor is configured to be connected to multiple functional modules in the application product respectively, so that multiple functional modules can be connected in series or in parallel, thereby realizing hierarchical control of the application product.

[0044] Next, taking the case where three static contacts and two moving contacts are configured as an example, the working principle of the contactor in this embodiment 1 is described in detail.

[0045] Please continue to refer to the attached Figure 1 and attached Figure 2As shown, in this embodiment 1, for ease of description, the three static contacts are defined as a first static contact 10a, a second static contact 10b, and a third static contact 10c. The first static contact 10a includes a static contact A100a and a first conductive member A101a electrically connected to the static contact A100a. The second static contact 10b includes a static contact B100b and a first conductive member B101b electrically connected to the static contact B100b. The third static contact 10c includes a static contact C100c and a first conductive member C101c electrically connected to the static contact C100c. Furthermore, the first conductive members of the three static contacts (specifically, the first conductive member A101a, the first conductive member B101b, and the first conductive member C101c) can each be any one of a flexible wire, a soft copper braided wire, or a flexible copper busbar formed by laminating multiple copper foils.

[0046] The two moving contacts are defined as: moving contact A11a and moving contact B11b; wherein, the moving contact A11a has a moving contact A110a and a second conductive member A111a electrically connected to the moving contact A110a, and the moving contact B11b has a moving contact B110b and a second conductive member B111b electrically connected to the moving contact B110b. In this embodiment 1, the second conductive members in the two moving contacts (specifically, the second conductive member A111a and the second conductive member B111b) can also be any one of a flexible wire, a soft copper braided wire, or a flexible copper busbar formed by stacking multiple copper foils. Moreover, the two moving contacts (i.e., the moving contact A11a and the moving contact B11b) are respectively driven and controlled by the driving mechanism 2, and the moving contact in each moving contact moves with the second conductive member.

[0047] In addition, regarding the above-mentioned "the two moving contacts are respectively driven and controlled by the driving mechanism 2", it can be preferably implemented by the following physical connection method: the contactor also includes a connecting structure connected to the moving contact, the driving mechanism is electromagnetically driven, and the driving mechanism electromagnetically drives the connecting structure to move to drive the moving contact to move.

[0048] Please continue to refer to the attached Figure 1 and attached Figure 2 As shown, in this embodiment 1, the moving contact A11a is spaced apart between the second static contact 10b and the third static contact 10c, and the moving contact B11b is spaced apart between the second static contact 10b and the first static contact 10a.

[0049] When the driving mechanism 2 drives the moving contact to move, so that the moving contact A110a of the moving contact A11a is electrically connected to the static contact B100b of the second static contact 10b, the moving contact B110b of the moving contact B11b is electrically connected to the static contact A100a of the first static contact 10a, and the static contact C100c of the third static contact 10c is in an open circuit state, the external circuit is switched to a parallel circuit; for details, please refer to the attached Figure 1 shown.

[0050] When the driving mechanism 2 drives the moving contact to move, so that the moving contact A110a of the moving contact A11a is electrically connected to the static contact C100c of the third static contact 10c, and the static contact B100b of the second static contact 10b, the moving contact B110b of the moving contact B11b, and the static contact A100a of the first static contact 10a are in an open circuit state, the external circuit is switched to a series circuit; for details, please refer to the attached Figure 2 shown.

[0051] Further preferably, one of the two movable contacts is configured such that at least two movable contacts are simultaneously provided on one second conductive member for switching connections with different static contacts; for details, please refer to the attached Figure 1 and attached Figure 2 As shown, the movable contact A11a is provided with two movable contacts A110a to respectively connect with the static contact B100b of the second static contact 10b and the static contact C100c of the third static contact 10c.

[0052] Another movable contact and three stationary contacts are each configured with one movable contact and one stationary contact facing the corresponding movable contact. It is understood that the second stationary contact 10b is configured with one stationary contact B100b, and the third stationary contact 10c is configured with one stationary contact C100c, respectively connecting and mating with the two movable contacts A110a; the movable contact B11b is configured with one movable contact B110b, and the first stationary contact 10a is configured with one stationary contact A100a, respectively connecting and mating with each other.

[0053] As can be seen from the above, the contactor provided in this embodiment 1 can realize the switching between series and parallel connection of external circuits, thereby realizing hierarchical control of application products.

[0054] In addition, it should be noted that the logical order in which the contactor described in this embodiment 1 switches the external circuit between series and parallel is not limited and is determined according to product requirements.

[0055] Example 2:

[0056] This embodiment 2 also provides a contactor that can realize hierarchical control of application products. Compared with embodiment 1, the main difference of this embodiment 2 is that: in this embodiment 2, the configuration quantity of the static contacts and the dynamic contacts and the connection / layout relationship between them are different from those in embodiment 1.

[0057] For details, please refer to the attached Figure 3 and attached Figure 4 As shown, in this second embodiment, two static contacts and two dynamic contacts are each configured. For ease of description, the two static contacts are defined as a fourth static contact 10d and a fifth static contact 10e. The fourth static contact 10d includes a static contact D100d and a first conductive member D101d electrically connected to the static contact D100d, and the fifth static contact 10e includes a static contact E100e and a first conductive member E101e electrically connected to the static contact E100e. As in the first embodiment, the first conductive members of the two static contacts (specifically, the first conductive member D101d and the first conductive member E101e) can also be any one of a flexible wire, a soft copper braided wire, or a flexible copper busbar formed by laminating multiple copper foils.

[0058] The two moving contacts are defined as: moving contact C11c and moving contact D11d, wherein the moving contact C11c has a moving contact C110c and a second conductive member C111c electrically connected to the moving contact C110c, and the moving contact D11d has a moving contact D110d and a second conductive member D111d electrically connected to the moving contact D110d. As in Example 1, the second conductive members in the two moving contacts (specifically, the second conductive member C111c and the second conductive member D111d) can also be any one of a flexible wire, a soft copper braided wire, or a flexible copper busbar formed by stacking multiple copper foils. The two moving contacts (i.e., the moving contact C11c and the moving contact D11d) are each driven and controlled by the driving mechanism 2, and the moving contact in each moving contact moves with the second conductive member.

[0059] In addition, regarding the above-mentioned "the two moving contacts are respectively driven and controlled by the driving mechanism 2", it can be preferably implemented by the following physical connection method: the contactor also includes a connecting structure connected to the moving contact, the driving mechanism is electromagnetically driven, and the driving mechanism electromagnetically drives the connecting structure to move to drive the moving contact to move.

[0060] Please continue to refer to the attached Figure 3 and attached Figure 4As shown, in this embodiment 2, the two moving contacts are disposed between the two static contacts, and at the same time, the moving contact C11c is close to the fourth static contact 10d, and the moving contact D11d is close to the fifth static contact 10e.

[0061] When the driving mechanism 2 drives the moving contact to move, so that the moving contact C110c of the moving contact C11c is electrically connected to the static contact D100d of the fourth static contact 10d, and the moving contact D110d of the moving contact D11d is electrically connected to the static contact E100e of the fifth static contact 10e, the external circuit is switched to a parallel circuit; for details, please refer to the attached Figure 3 shown.

[0062] When the driving mechanism 2 drives the moving contact to move, so that the moving contact C110c of the moving contact C11c is electrically connected to the moving contact D110d of the moving contact D11d, and the static contact D100d of the fourth static contact 10d and the static contact E100e of the fifth static contact 10e are both in an open circuit state, the external circuit is switched to a series circuit; for details, please refer to the attached Figure 4 shown.

[0063] Further preferably, in this embodiment 2, the two moving contacts (ie, the moving contact C11c and the moving contact D11d) are both configured as at least two moving contacts; for details, please refer to the attached Figure 3 and attached Figure 4 As shown, the number of the movable contact C110c and the number of the movable contact D110d are both configured in pairs.

[0064] In the second embodiment, the two static contacts (i.e., the fourth static contact 10d and the fifth static contact 10e) are each provided with at least one static contact facing the direction of the corresponding moving contact; for details, please refer to the attached Figure 3 and attached Figure 4 As shown, the static contact D100d and the static contact E100e are both configured as one.

[0065] As can be seen from the above, the contactor provided in this embodiment 2 can realize the switching between series and parallel connection of external circuits, thereby realizing hierarchical control of application products.

[0066] In addition, it should be noted that the logical order in which the contactor described in this embodiment 2 switches the external circuit between series and parallel is not limited and is determined according to product requirements.

[0067] Example 3:

[0068] This embodiment 3 also provides a contactor that can realize hierarchical control of application products. Compared with embodiment 1, the main difference of this embodiment 3 is that: in this embodiment 3, the configuration quantity of the static contacts and the dynamic contacts and the connection / layout relationship between them are different from those in embodiment 1.

[0069] For details, please refer to the attached Figure 5 and attached Figure 6 As shown, in this embodiment 3, the two static contacts and the two dynamic contacts are each configured. For ease of description, the two static contacts are defined as a sixth static contact 10f and a seventh static contact 10g, respectively. The sixth static contact 10f has a static contact F100f and a first conductive member F101f electrically connected to the static contact F100f, and the seventh static contact 10g has a static contact G100g and a first conductive member G101g electrically connected to the static contact G100g. As in embodiment 1, the first conductive members of the two static contacts (specifically, the first conductive member F101f and the first conductive member G101g) can also be any one of a flexible wire, a soft copper braided wire, or a flexible copper busbar formed by laminating multiple copper foils.

[0070] The two moving contacts are defined as: moving contact E11e and moving contact F11f, wherein the moving contact E11e has a moving contact E110e and a second conductive member E111e electrically connected to the moving contact E110e, and the moving contact F11f has a moving contact F110f and a second conductive member F111f electrically connected to the moving contact F110f. As in Example 1, the second conductive members in the two moving contacts (specifically, the second conductive member E111e and the second conductive member F111f) can also be any one of a flexible wire, a soft copper braided wire, or a flexible copper busbar formed by stacking multiple copper foils. The two moving contacts (i.e., the moving contact E11e and the moving contact F11f) are each driven and controlled by the driving mechanism 2, and the moving contact in each moving contact moves with the second conductive member.

[0071] In addition, regarding the above-mentioned "the two moving contacts are respectively driven and controlled by the driving mechanism 2", it can be preferably implemented by the following physical connection method: the contactor also includes a connecting structure connected to the moving contact, the driving mechanism is electromagnetically driven, and the driving mechanism electromagnetically drives the connecting structure to move to drive the moving contact to move.

[0072] Please continue to refer to the attached Figure 5 and attached Figure 6As shown, in this embodiment 3, the two static contacts are spaced apart from the two dynamic contacts, and at the same time the dynamic contact E11e is placed between the sixth static contact 10f and the seventh static contact 10g, and the dynamic contact F11f is close to the seventh static contact 10g and is located on the side of the seventh static contact 10g facing away from the dynamic contact E11e.

[0073] When the driving mechanism 2 drives the moving contact to move, so that the moving contact E110e of the moving contact E11e is electrically connected to the static contact F100f of the sixth static contact 10f, and the moving contact F110f of the moving contact F11f is electrically connected to the static contact G100g of the seventh static contact 10g, the external circuit is switched to a parallel circuit; for details, please refer to the attached Figure 5 shown.

[0074] When the driving mechanism 2 drives the moving contact to move, so that the moving contact E110e of the moving contact E11e is electrically connected to the static contact G100g of the seventh static contact 10g, and the static contact F100f of the sixth static contact 10f and the moving contact F110f of the moving contact F11f are both in an open circuit state, the external circuit is switched to a series circuit; for details, please refer to the attached Figure 6 shown.

[0075] Further preferably, in this embodiment 3, one of the static contact members and one of the dynamic contact members are respectively configured as at least two static contacts and two dynamic contacts. For understanding, please continue to refer to the attached Figure 5 and attached Figure 6 As shown, the number of the movable contact E110e of the movable contact E11e and the number of the stationary contact G100g of the seventh stationary contact 10g are both configured in pairs.

[0076] The other static contact and the other dynamic contact are respectively configured as a static contact and a dynamic contact. For understanding, please continue to refer to the attached Figure 5 and attached Figure 6 As shown, the static contact F100f of the sixth static contact 10f and the movable contact F110f of the movable contact F11f are both configured as one.

[0077] As can be seen from the above, the contactor provided in this embodiment 3 can realize the switching between series and parallel connection of external circuits, thereby realizing hierarchical control of application products.

[0078] In addition, it should be noted that the logical order in which the contactor described in this embodiment 3 switches the external circuit between series and parallel is not limited and is determined according to product requirements.

[0079] In summary, the contactors provided in Examples 1 to 3 of the present invention can all achieve hierarchical control of application products. As for the overall structural type of the contactor, it can be specifically adopted: a monostable contactor or a bistable contactor. Of course, regarding the bistable contactor, it can be further preferably a magnetically held bistable contactor, a mechanically self-holding bistable contactor, or a bistable contactor combined with mechanical and magnetic holding. Therefore, the specific structures of the drive mechanism 2, static contacts, dynamic contacts and other mechanisms and / or components described in Examples 1 to 3 can all adopt the structural configurations of existing monostable or bistable contactors, so they will not be elaborated here.

[0080] Example 4:

[0081] This embodiment 4 provides a device for switching battery packs in series and parallel, which mainly includes multiple battery packs 3 and the contactor as described in Example 1. The contactor is respectively connected to the multiple battery packs 3 to realize the series and parallel switching function of the circuit in the battery pack 3, and can realize the conversion between different voltage values according to the series and parallel switching of the static contact and the moving contact in the contactor.

[0082] Specifically, attached Figure 7 and attached Figure 8 The figure shows a case where the battery packs 3 are configured as two and the contactors are configured as one group. It can be seen from the figure that the first static contact 10a, the second static contact 10b and the third static contact 10c are electrically connected to the positive and negative poles of one group of the battery packs, respectively; the moving contact A11a and the moving contact B11b are electrically connected to the positive and negative poles of the other group of the battery packs, respectively.

[0083] The contactor can realize the parallel connection of the two battery packs 3 (see attached Figure 7 as shown) or in series (see attached Figure 8 As shown), the supply voltage of the battery pack module can be controlled in stages.

[0084] Example 5:

[0085] This embodiment 5 also provides a device for switching battery packs in series and parallel, which mainly includes multiple battery packs 3 and the contactor as described in Example 2. The contactor is respectively connected to the multiple battery packs 3 to realize the series and parallel switching function of the circuit in the battery pack 3, and can realize the conversion between different voltage values according to the series and parallel switching of the static contact and the moving contact in the contactor.

[0086] Specifically, attached Figure 9 and attached Figure 10The figure shows a case where two battery packs 3 are configured and the contactors are configured as a group. It can be seen from the figure that the moving contact D11d and the fourth static contact 10d are respectively electrically connected to the positive and negative poles of one group of the battery packs, and the fifth static contact 10e and the moving contact C11c are respectively electrically connected to the positive and negative poles of the other group of the battery packs.

[0087] The contactor can realize the parallel connection of the two battery packs 3 (see attached Figure 9 as shown) or in series (see attached Figure 10 As shown), the supply voltage of the battery pack module can be controlled in stages.

[0088] Example 6:

[0089] This embodiment 6 also provides a device for switching battery packs in series and parallel, which mainly includes multiple battery packs 3 and the contactor as described in Example 3. The contactor is respectively connected to the multiple battery packs 3 to realize the series and parallel switching function of the circuit in the battery pack 3, and can realize the conversion between different voltage values according to the series and parallel switching of the static contact and the moving contact in the contactor.

[0090] Specifically, attached Figure 11 and attached Figure 12 It shows a situation where the battery packs 3 are configured as two and the contactors are configured as one group. It can be seen from the figure that the seventh static contact 10g and the sixth static contact 10f are respectively electrically connected to the positive and negative poles of one group of the battery packs, and the moving contact F11f and the moving contact E11e are respectively electrically connected to the positive and negative poles of the other group of the battery packs.

[0091] The contactor can realize the parallel connection of the two battery packs 3 (see attached Figure 11 as shown) or in series (see attached Figure 12 As shown), the supply voltage of the battery pack module can be controlled in stages.

[0092] In summary, the contactor provided by the present invention has a simple, reasonable and novel structure, can realize hierarchical control of application products (such as battery pack modules), improve the overall operating efficiency of application products, reduce the overall volume and production cost of application products, and well meet market demand.

[0093] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A contactor, characterized in that: include: A conversion mechanism (1) is provided with a stationary contact having a stationary contact and a moving contact having a moving contact; the total number of the stationary contacts and the moving contacts is four or five, the number of the moving contacts is not less than two and they are connected to each other, and at least one of the moving contacts is configured such that at least two moving contacts are simultaneously provided on the moving contact for switching connections with different stationary contacts and / or moving contacts; The driving mechanism (2) is used to drive the movable contact to move so that the contactor can be switched, thereby realizing the switching between series and parallel connection of the external circuit.

2. The contactor according to claim 1, characterized in that: The stationary contact comprises the stationary contact and a first conductive member connected to the stationary contact; the movable contact comprises the movable contact and a second conductive member connected to the movable contact; the movable contact moves with the second conductive member.

3. The contactor according to claim 2, characterized in that: The contactor includes two static contacts and two moving contacts, and the two static contacts are spaced apart from the two moving contacts; the two static contacts and the two moving contacts are electrically connected to each other, and the external circuit is switched to a parallel circuit; the driving mechanism drives the moving contact to move so that the static contact and the moving contact located in the middle are electrically connected, and the static contact and the moving contact located on both sides are in an open circuit state, and the external circuit is switched to a series circuit.

4. The contactor according to claim 3, characterized in that: One of the static contacts and one of the dynamic contacts are respectively configured as at least two static contacts and two dynamic contacts, and the other static contact and the other dynamic contact are respectively configured as one static contact and one dynamic contact, and the static contact with two static contacts and the dynamic contact with two dynamic contacts are arranged adjacent to each other and located in the middle position.

5. The contactor according to claim 4, characterized in that: The contactor is used to control the battery pack, wherein the positive and negative electrodes of one group of the battery packs are electrically connected to the two static contacts respectively, and the positive and negative electrodes of another group of the battery packs are electrically connected to the two moving contacts respectively.

6. The contactor according to claim 2, characterized in that: The contactor includes two movable contacts and two stationary contacts, wherein the two movable contacts are arranged between the two stationary contacts; the movable contacts are electrically connected to their corresponding stationary contacts, and the external circuit is switched to a parallel circuit; The driving mechanism drives the movable contacts to move, so that the two movable contacts are electrically connected, and the two static contacts are in an open circuit state, and the external circuit is switched to a series circuit.

7. The contactor according to claim 6, characterized in that: The movable contact is configured as at least two movable contacts, and the stationary contact is configured with at least one stationary contact facing the direction of the movable contact corresponding thereto.

8. The contactor according to claim 7, characterized in that: The contactor is used to control the battery pack, and the positive and negative poles of the two groups of battery packs are electrically connected to one of the static contacts and one of the dynamic contacts, respectively. The positive pole of one group of battery packs is electrically connected to the static contact, and the negative pole is electrically connected to the dynamic contact; the positive pole of the other group of battery packs is electrically connected to the dynamic contact, and the negative pole is electrically connected to the static contact.

9. The contactor according to claim 2, characterized in that: The contactor includes three static contacts and two moving contacts, and the two moving contacts are arranged at intervals between the three static contacts; the two moving contacts are electrically connected to the two adjacent static contacts respectively, and when one static contact is in an open circuit state, the external circuit is switched to a parallel circuit; when the driving mechanism drives the moving contact to move so that the moving contact is electrically connected to the static contact that is in an open circuit state when in parallel, the other moving contact and the other two static contacts are all in an open circuit state, and the external circuit is switched to a series circuit.

10. The contactor according to claim 9, characterized in that: One of the two moving contacts is configured as at least two moving contacts simultaneously provided on one second conductive member for switching connections with different static contacts; the other moving contact and the three static contacts are respectively configured with one moving contact and one static contact facing the direction of the corresponding moving contact.

11. The contactor according to claim 10, characterized in that: The contactor is used to control the battery pack, and the static contact and the dynamic contact are electrically connected to two battery packs respectively; the three static contacts are electrically connected to the positive and negative poles of one battery pack; and the two dynamic contacts are electrically connected to the positive and negative poles of the other battery pack.

12. The contactor according to claim 1, wherein: The contactor further includes a connecting structure connected to the movable contact, and the driving mechanism is electromagnetically driven. The driving mechanism electromagnetically drives the connecting structure to move so as to drive the movable contact to move.

13. The contactor according to claim 1, wherein: The contactor is a monostable contactor or a bistable contactor, and the bistable contactor includes a magnetic holding structure or a mechanical holding structure or a structure combining mechanical and magnetic holding.

14. A device for switching between series and parallel connection of battery packs, characterized by: The invention comprises a plurality of battery packs (3) and a contactor connected to any one of claims 1 to 13, so as to realize the series-parallel switching function of the circuit in the battery pack (3), and can realize the conversion between different voltage values according to the series-parallel switching of the static contact and the dynamic contact in the contactor.

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