Pre-charging structure and pre-charging device

Abstract

The utility model relates to the technical field of new energy automobiles, and discloses a pre-charging structure and a pre-charging device.According to the pre-charging structure provided by the utility model, a high-voltage connecting terminal, a resistor and a relay assembly are integrally mounted on a shell, so that the pre-charging structure has the capabilities of a pre-charging resistor and a pre-charging relay at the same time; compared with independent installation of each component in a conventional scheme, the number of the components is reduced, so that installation points are reduced, installation working hours and installation cost are further reduced, meanwhile, due to integrated arrangement, the overall layout of the structure is more compact, a certain space can be saved for installation of other electrical elements, and the space utilization rate is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to a pre-charging structure and a pre-charging device. Background Art

[0002] With the continuous development of new energy vehicles, new requirements are constantly being put forward for their safety and driving range. Because there are a large number of capacitive loads in the power battery circuit at the vehicle end, if the main positive / main negative relay of the power battery system is directly closed, it will cause a large current transient impact on the external capacitive load, which will cause serious damage to the entire circuit. Therefore, it is necessary to add a pre-charging circuit and use the high resistance value of the pre-charging resistor in the circuit to reduce the current in the initial charging stage to avoid damage and other consequences.

[0003] The conventional pre-charging circuit at least includes a pre-charging resistor, a pre-charging relay, a main positive relay, and three high-voltage wire harnesses for electrical connection of the three. During installation, each component in the pre-charging circuit is installed separately. However, due to the large number of components, the space utilization rate of the device after installation is low, and the installation time is long and the cost is high. Utility Model Content

[0004] In view of this, the utility model provides a pre-charging structure and a pre-charging device to solve the problems of low space utilization, long installation time and high cost caused by the separate installation of each component.

[0005] In the first aspect, the utility model provides a pre-charging structure, including a shell, a high-voltage connection terminal, a resistor and a relay assembly, wherein the high-voltage connection terminal, the resistor and the relay assembly are integrated and installed in the shell, the resistor is provided with two electrical connection ends, one of which is electrically connected to one end of the high-voltage connection terminal, and the static contact in the relay assembly is electrically connected to the other electrical connection end; wherein the high-voltage connection terminal passes through the shell, and the other end of the high-voltage connection terminal extends outside the shell.

[0006] Beneficial effect: By integrating the high-voltage connection terminals, resistors and relay components on the housing, the pre-charging structure has the ability to pre-charge resistors and pre-charge relays. Compared with the conventional solution in which each component is installed separately, the number of components is reduced, thereby reducing the number of installation points, thereby reducing the installation time and installation costs. At the same time, due to the integrated setting, the overall layout of the structure is more compact, which can save a certain amount of space for the installation of other electrical components, thereby improving space utilization.

[0007] In an optional embodiment, the relay assembly also includes a mounting base, a coil, a push rod and a moving contact, the coil is sleeved on the outside of the mounting base, the end of the push rod close to the mounting base is inserted into the mounting base and moves in the mounting base, the end of the push rod away from the mounting base extends toward the side of the static contact, and the moving contact is installed at the end of the push rod away from the mounting base; wherein, the high-voltage connecting terminals are provided with two, one of which is electrically connected to the resistor, and the moving contact is provided with two extension ends, the two extension ends are electrically connected, one of the extension ends is used to contact with the static contact, and the other extension end is used to contact with the other high-voltage connecting terminal.

[0008] Beneficial effect: By setting the mounting seat, coil, push rod and moving contact, when the coil is energized, the push rod moves and drives the moving contact to contact with the static contact, so that the circuit is turned on, and when the coil is de-energized, the push rod is driven to move in the opposite direction under the action of the reset member until the moving contact and the static contact are spaced apart, so that the circuit is disconnected. In this way, the pre-charging structure can quickly turn on and off the circuit.

[0009] In an optional embodiment, the relay assembly further includes a reset member, the reset member is elastic, and both elastic ends of the reset member are arranged between the moving contact and the mounting seat.

[0010] Beneficial effect: By making the reset part elastic, when the coil is energized, it will drive the push rod to move, thereby causing the reset part to deform, and the reset part will store energy at this time; when the coil is de-energized, the reset part will release energy and gradually return to its initial state. During the recovery process, the other end of the push rod will be driven away from the static contact, thereby causing the moving contact and the static contact to be spaced apart.

[0011] In an optional embodiment, the reset member is a spring, the spring is sleeved outside the push rod, and the elastic ends of the spring are respectively in contact with the moving contact and the mounting seat.

[0012] In an optional embodiment, the relay assembly further includes a coil control terminal, the coil control terminal passes through the shell, one end of the coil control terminal is electrically connected to the coil, and the other end of the coil control terminal extends outside the shell.

[0013] Beneficial effect: By passing the coil control terminal through the shell, since one end of the coil control terminal is electrically connected to the coil and the other end of the coil control terminal extends outside the shell, a power supply such as a power supply can be quickly connected to the coil control terminal outside the shell to power the coil.

[0014] In an optional implementation, two electrical connection ends of the resistor are welded to the high-voltage connection terminal and the static contact, respectively.

[0015] Beneficial effect: By welding the two electrical connection ends of the resistor to the high-voltage connection terminal and the static contact respectively, the number of high-voltage wiring harnesses used can be reduced, making the overall layout of the structure more compact, thereby saving space for the installation of other electrical components, thereby improving space utilization.

[0016] In an optional embodiment, the outer wall of the shell is provided with a mounting boss extending in a direction away from the shell, and the mounting boss is provided with a mounting hole.

[0017] Beneficial effect: By providing a mounting boss on the outer wall of the shell and providing a mounting hole at the mounting boss, it is convenient to use fasteners such as bolts for installation, thereby fixing the shell.

[0018] In an optional embodiment, the shell includes an upper cover, and the high-voltage connection terminal passes through the upper cover.

[0019] In an optional implementation, the static contact is arranged close to the upper cover.

[0020] In a second aspect, the utility model further provides a pre-charging device, comprising a total positive circuit, a total negative circuit, and any optional pre-charging structure of the above-mentioned first aspect installed in parallel with the total positive circuit or the total negative circuit.

[0021] Beneficial effect: Because the pre-filling device includes a pre-filling structure, it has the same effect as the pre-filling structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic structural diagram of a pre-filling structure provided in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Shell; 101. Mounting hole; 102. Upper cover; 2. High-voltage connection terminal; 3. Resistor; 4. Static contact; 5. Mounting seat; 6. Coil; 7. Push rod; 8. Moving contact; 9. Reset member; 11. Coil control terminal. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] In the description of the present application, it should be understood that the terms "upper", "vertical", "top", "bottom", "side", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In the description of the present application, unless otherwise specified, “plurality” means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] See also Figure 1 , Figure 1 A structural schematic diagram of the pre-charging structure provided in an embodiment of the present application is shown.

[0031] Combine the following Figure 1 , describing an embodiment of the utility model.

[0032] In the first aspect, a pre-charging structure is provided, which includes a housing 1, a high-voltage connection terminal 2, a resistor 3 and a relay assembly. Specifically, the high-voltage connection terminal 2, the resistor 3 and the relay assembly are integrated and installed in the housing 1, the resistor 3 is provided with two electrical connection ends, one of which is electrically connected to one end of the high-voltage connection terminal 2, and the static contact 4 in the relay assembly is electrically connected to the other electrical connection end; wherein the high-voltage connection terminal 2 passes through the housing 1, and the other end of the high-voltage connection terminal 2 extends outside the housing 1.

[0033] By using the technical solution of this embodiment, the high-voltage connection terminal 2, the resistor 3 and the relay assembly are integrated and installed on the housing 1, so that the pre-charging structure has the ability to pre-charge the resistor and pre-charge the relay. The resistor 3 acts as a pre-charging resistor to reduce the current of the system high-voltage circuit when the main positive relay is closed. Compared with the conventional solution where each component is installed separately, the number of components is reduced, thereby reducing the installation points, and further reducing the installation time and installation costs; at the same time, due to the integrated setting, the overall layout of the structure is more compact, which can save a certain amount of space for the installation of other electrical components, thereby improving space utilization.

[0034] like Figure 1 As shown, the relay assembly also includes a mounting base 5, a coil 6, a push rod 7 and a moving contact 8. The coil 6 is sleeved on the outside of the mounting base 5, and the end of the push rod 7 close to the mounting base 5 is inserted into the mounting base 5 and moves in the mounting base 5. The end of the push rod 7 away from the mounting base 5 extends toward the side of the static contact 4, and the moving contact 8 is installed at the end of the push rod 7 away from the mounting base 5.

[0035] Among them, there are two high-voltage connection terminals 2, one of which is electrically connected to the resistor 3, and the moving contact 8 is provided with two epitaxial ends, the two epitaxial ends are electrically connected, one of the epitaxial ends is used to contact the static contact 4, and the other epitaxial end is used to contact the other high-voltage connection terminal 2.

[0036] When the coil 6 is energized, the end of the push rod 7 that is away from the mounting seat 5 is driven to approach the static contact 4 along the axial direction of the push rod 7 until one of the extended ends of the moving contact 8 contacts the static contact 4, and the other extended end of the moving contact 8 contacts the high-voltage connection terminal 2 to form a passage; when the coil 6 is de-energized, the reset member 9 drives the end of the push rod 7 that is away from the mounting seat 5 to move away from the static contact 4 along the axial direction of the push rod 7 until one of the extended ends of the moving contact 8 is separated from the static contact 4, and the other extended end of the moving contact 8 is separated from the other high-voltage connection terminal 2 to disconnect the passage.

[0037] By using the technical solution of this embodiment, by setting the mounting seat 5, coil 6, push rod 7 and moving contact 8, when the coil 6 is energized, the push rod 7 moves and drives the moving contact 8 to contact with the static contact 4, so that the circuit is turned on, and when the coil 6 is de-energized, the push rod 7 is driven to move in the opposite direction under the action of the reset member 9 until the moving contact 8 is spaced apart from the static contact 4, so that the circuit is disconnected. In this way, the pre-charging structure can quickly turn on and off the circuit.

[0038] It can be explained that the reset member 9 is elastic, and the elastic ends of the reset member 9 are arranged between the moving contact 8 and the mounting seat 5 .

[0039] By utilizing the technical solution of the present embodiment, the reset member 9 is made elastic. When the coil 6 is energized, the push rod 7 is driven to move, thereby causing the reset member 9 to deform. At this time, the reset member 9 stores energy. When the coil 6 is de-energized, the reset member 9 releases energy and gradually returns to its initial state. During the recovery process, the other end of the push rod 7 is driven away from the static contact 4, thereby causing the moving contact 8 to be spaced apart from the static contact 4.

[0040] Preferably, the reset member 9 is a spring. During installation, the spring is sleeved outside the push rod 7, and the elastic ends of the spring are respectively in contact with the moving contact 8 and the mounting seat 5.

[0041] Still Figure 1 As shown, the relay assembly also includes a coil control terminal 11, which passes through the shell 1, one end of the coil control terminal 11 is electrically connected to the coil 6, and the other end of the coil control terminal 11 extends outside the shell 1 and is connected to a power supply such as a power supply.

[0042] By utilizing the technical solution of this embodiment, the coil control terminal 11 is passed through the shell 1. Since one end of the coil control terminal 11 is electrically connected to the coil 6, and the other end of the coil control terminal 11 extends outside the shell 1, a power supply such as a power supply can be quickly connected to the coil control terminal 11 outside the shell 1, thereby supplying power to the coil 6.

[0043] It can be explained that, in this embodiment, two coil control terminals 11 are provided.

[0044] Furthermore, the two coil control terminals 11 are arranged at intervals. In the two coil control terminals 11, one end of the two coil control terminals 11 is located inside the housing 1, and is electrically connected to the two electrical connection ends of the coil 6 respectively; the other ends of the two coil control terminals 11 are both arranged through the housing and extend outside the housing 1, and are respectively connected to the positive and negative electrodes of the power supply to form a loop, so as to power the coil.

[0045] Likewise, the present application does not specifically limit the position where the coil control terminal 11 penetrates the housing 1. According to actual installation requirements, the two coil control terminals 11 can be penetrated at one or more of the top, side and bottom of the housing 1.

[0046] It can be explained that the present application does not specifically limit the electrical connection method between the resistor 3 and the high-voltage connection terminal 2 and the static contact 4 .

[0047] As one implementation mode, two electrical connection ends of the resistor 3 are welded to the high-voltage connection terminal 2 and the static contact 4 respectively.

[0048] By utilizing the technical solution of the present embodiment, by respectively welding the two electrical connection ends of the resistor 3 to the high-voltage connection terminal 2 and the static contact 4, the number of high-voltage wiring harnesses used can be reduced, that is, the number of components can be reduced, thereby reducing the number of installation points, and further reducing the installation man-hours and installation costs during the assembly process, reducing the BOM cost, and at the same time making the overall layout of the structure more compact, thereby saving space for the installation of remaining electrical components, thereby improving space utilization, and at the same time, increasing the reliability of the resistor 3 after being connected to the high-voltage connection terminal 2 and the static contact 4; in addition, by reducing the number of high-voltage wiring harnesses, the weight can be reduced, thereby improving the energy density.

[0049] like Figure 1 As shown, the outer wall of the housing 1 is provided with a mounting boss extending in a direction away from the housing 1 , and the mounting boss is provided with a mounting hole 101 .

[0050] According to the technical solution of this embodiment, a mounting boss is provided on the outer wall of the housing 1 and a mounting hole 101 is provided at the mounting boss, so that the housing 1 can be easily installed using fasteners such as bolts, thereby fixing the housing 1.

[0051] It can be explained that the present application does not specifically limit the number of mounting bosses, which can be determined according to actual needs, and can be one, two or more.

[0052] As one implementation mode, in order to avoid the shell 1 from becoming unstable after installation, two or more mounting bosses are provided.

[0053] Furthermore, two or more mounting bosses are arranged at one or more locations among the top, side and bottom of the housing 1 according to actual needs.

[0054] Preferably, if Figure 1 As shown, two mounting bosses are arranged at the bottom of the housing 1 .

[0055] It can be explained that the present application does not specifically limit the number of high-voltage connection terminals 2, which can be two or more. In this embodiment, two high-voltage connection terminals 2 are provided.

[0056] Likewise, the present application does not specifically limit the position where the high-voltage connection terminal 2 penetrates the housing 1. According to actual installation requirements, the two high-voltage connection terminals 2 can be penetrated at one or more of the top, side and bottom of the housing 1.

[0057] As one implementation mode, when the bottom of the housing 1 is fixedly mounted to the outside, two or more high-voltage connection terminals 2 penetrate the top and / or side of the housing 1 .

[0058] Preferably, if Figure 1As shown, the housing 1 includes an upper cover 102, and the two high-voltage connection terminals 2 and the two coil control terminals 11 are all inserted through the upper cover 102 and extend outside the housing 1, so that the operator can use a wire harness to make electrical connections. For example, the operator uses two high-voltage wire harnesses to electrically connect the two high-voltage connection terminals 2 to the main positive relay respectively; for another example, the operator uses a wire harness to electrically connect the two coil control terminals 11 to the power supply.

[0059] It can be explained that the present application does not specifically limit the installation position of the static contact 4 .

[0060] Preferably, if Figure 1 As shown, at this time, the static contact 4, the mounting seat 5, the coil 6, the push rod 7 and the moving contact 8 are all installed inside the housing 1, the static contact 4 is arranged close to the upper cover 102, and the resistor 3 is arranged in the space close to the static contact 4 and the high-voltage connection terminal 2. Such an arrangement can make the high-voltage connection terminal 2, the static contact 4 and the resistor 3 more compact after installation, making the overall layout of the structure more compact, and can save a certain space for the installation of other electrical components, thereby improving space utilization.

[0061] At the same time, the moving direction of the push rod 7 is made vertical. At this time, one end of the push rod 7 is moved in the mounting seat 5, and the other end of the push rod 7 is arranged between the mounting seat 5 and the static contact 4 in the vertical direction, and the moving contact 8 is installed at the end of the push rod 7 away from the mounting seat 5, so that the magnetic field force generated after the coil 6 is energized drives the push rod 7 to drive the moving contact 8 to move to the side of the static contact 4 until one of the extended ends of the moving contact 8 contacts the static contact 4, and the other extended end of the moving contact 8 contacts the high-voltage connection terminal 2, so that the circuit is conductive. Such an arrangement makes the components more compact and further improves the space utilization.

[0062] Furthermore, in the present application, the two extension ends are moved synchronously. For example, the two extension ends are arranged on the side of the push rod 7 away from the mounting seat 5 along the axial direction of the push rod 7, and when the side of the push rod 7 away from the mounting seat 5 moves close to the static contact 4 and drives one of the extension ends to contact the static contact 4, the other extension end is driven to contact the vacant high-voltage connection terminal 2, so that the circuit is conductive.

[0063] It can be explained that the vertical direction mentioned above is Figure 1 The vertical direction in .

[0064] It can be explained that the present application does not specifically limit the material of the housing 1, and it only needs to be insulated. Preferably, the housing 1 is made of plastic, which is used to fix and protect the internal components of the housing 1.

[0065] It can be explained that the present application does not specifically limit the type of the resistor 3, and the resistor 3 can be integrated and placed inside the housing 1. For example, the resistor 3 can be a resistance wire, a sheet resistor, or the like.

[0066] On the other hand, the present application also provides a pre-charging device, a total positive circuit, a total negative circuit, and a pre-charging structure installed in parallel with the total positive circuit or the total negative circuit.

[0067] Among them, the total positive circuit includes a main positive relay, and the total negative circuit includes a main negative relay. During installation, a high-voltage wiring harness is used to install the pre-charging structure in parallel on both sides of the main positive relay or in parallel on both sides of the main negative relay.

[0068] Specifically, the extended part of the high-voltage connection terminal 2 outside the shell 1 can be welded or plugged into a quick-connect connector or a quick-connect socket. At this time, a quick-connect socket or a quick-connect connector is correspondingly arranged at one end of the high-voltage wiring harness, so that the quick-connect plug can be directly inserted into the quick-connect slot to achieve conduction between the high-voltage wiring harness and the high-voltage connection terminal 2. A ring terminal is provided at the other end of the high-voltage wiring harness to facilitate quick connection of the other end of the high-voltage connection terminal 2 with the main positive relay or the main negative relay.

[0069] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A pre-filling structure, characterized in that: include: Housing (1); A high-voltage connection terminal (2), a resistor (3) and a relay assembly, wherein the high-voltage connection terminal (2), the resistor (3) and the relay assembly are integrally mounted on the housing (1), the resistor (3) is provided with two electrical connection ends, one of which is electrically connected to one end of the high-voltage connection terminal (2), and the static contact (4) in the relay assembly is electrically connected to the other electrical connection end; The high-voltage connection terminal (2) passes through the shell (1), and the other end of the high-voltage connection terminal (2) extends outside the shell (1).

2. The pre-filling structure according to claim 1, characterized in that: The relay assembly further comprises a mounting seat (5), a coil (6), a push rod (7) and a moving contact (8), wherein the coil (6) is sleeved on the outside of the mounting seat (5), an end of the push rod (7) close to the mounting seat (5) is inserted into the mounting seat (5) and moves in the mounting seat (5), an end of the push rod (7) away from the mounting seat (5) extends toward one side of the stationary contact (4), and the moving contact (8) is mounted on an end of the push rod (7) away from the mounting seat (5); There are two high-voltage connection terminals (2), one of which is electrically connected to the resistor (3); the moving contact (8) is provided with two extension ends, the two extension ends are electrically connected, one of which is used to contact the stationary contact (4), and the other of which is used to contact the other high-voltage connection terminal (2).

3. The pre-filling structure according to claim 2, characterized in that: The relay assembly also includes a reset member (9), the reset member (9) is elastic, and the elastic ends of the reset member (9) are arranged between the moving contact (8) and the mounting seat (5).

4. The pre-filling structure according to claim 3, characterized in that: The reset member (9) is a spring, which is sleeved outside the push rod (7), and the elastic ends of the spring are in contact with the moving contact (8) and the mounting seat (5) respectively.

5. The pre-filling structure according to claim 2, characterized in that: The relay assembly further comprises a coil control terminal (11), wherein the coil control terminal (11) passes through the housing (1), one end of the coil control terminal (11) is electrically connected to the coil (6), and the other end of the coil control terminal (11) extends outside the housing (1).

6. The pre-filling structure according to any one of claims 1 to 5, characterized in that: The two electrical connection ends of the resistor (3) are respectively welded to the high-voltage connection terminal (2) and the static contact (4).

7. The pre-filling structure according to any one of claims 1 to 5, characterized in that: The outer wall of the shell (1) is provided with a mounting boss extending in a direction away from the shell (1), and the mounting boss is provided with a mounting hole (101).

8. The pre-filling structure according to any one of claims 1 to 5, characterized in that: The housing (1) comprises an upper cover (102), and the high-voltage connection terminal (2) passes through the upper cover (102).

9. The pre-filling structure according to claim 8, characterized in that: The static contact (4) is arranged close to the upper cover (102).

10. A pre-filling device, characterized in that: The invention comprises a total positive circuit, a total negative circuit and a pre-charging structure as described in any one of claims 1 to 9 which is installed in parallel with the total positive circuit or the total negative circuit.

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