Multifunctional power distribution box with double-layer design

Abstract

The utility model discloses a multifunctional power distribution box with a double-layer design, which comprises a casing, a main loop and an auxiliary loop are arranged in the casing, and the auxiliary loop is superposed above the main loop. According to the utility model, the auxiliary loop is superposed above the main loop, so that the height space of the distribution box is fully used under the condition that the length and the width of the battery pack are limited, a double-layer structural design is formed, the distribution box can accommodate the auxiliary loop, and the space utilization rate of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy battery technology, in particular to a multifunctional distribution box with a double-layer design. Background Art

[0002] The battery distribution box is located inside the battery pack. It is used to distribute the battery pack energy to different electrical appliances, connect and disconnect circuits, and protect the battery and on-board electrical appliances in the event of short circuit / overload abnormalities. In order to meet the needs of improving vehicle endurance and vehicle space, it is necessary to place as many battery cells as possible in the battery pack, and some fuses used to protect auxiliary electrical appliances also need to be placed in the battery pack by the vehicle. Therefore, the width of the distribution box is further compressed. Even if the length of the distribution box is increased, it is difficult to achieve under the premise of increasing the functions of the distribution box. Summary of the invention

[0003] In view of the above problems existing in the existing battery pack, the present invention aims to provide a multifunctional distribution box with a double-layer design having high space utilization and long service life.

[0004] The specific technical solutions are as follows:

[0005] A multifunctional distribution box with a double-layer design comprises a casing, in which a main circuit and an auxiliary circuit are installed, and the auxiliary circuit is superimposed on the main circuit.

[0006] As a further improvement and optimization of the present solution, the main circuit comprises: a main positive circuit and a main negative circuit respectively connected to the auxiliary circuit;

[0007] Wherein, the main positive circuit includes two main positive fuses and two main positive contactors, the two main positive fuses are respectively arranged in series with the two main positive contactors to form two series circuits, and the two series circuits are arranged in parallel;

[0008] The main negative circuit includes two main negative contactors, and the two main negative contactors are arranged in parallel.

[0009] As a further improvement and optimization of the present solution, the auxiliary circuit includes an auxiliary positive circuit connected in series with the main positive circuit and an auxiliary negative circuit connected in series with the main negative circuit.

[0010] As a further improvement and optimization of the present solution, the auxiliary positive circuit includes a plurality of auxiliary function fuses, and the plurality of auxiliary function fuses and the main positive circuit are connected in series via an auxiliary bus.

[0011] As a further improvement and optimization of the present solution, the auxiliary negative circuit includes an auxiliary negative bus, and the auxiliary negative circuit is connected to the main negative circuit via an auxiliary negative transfer bus.

[0012] As a further improvement and optimization of the present solution, the casing includes a lower shell, an upper shell and a fuse protection cover which are detachably connected from bottom to top, the main circuit is arranged between the lower shell and the upper shell, and the auxiliary circuit is arranged between the upper shell and the fuse protection cover.

[0013] As a further improvement and optimization of the present solution, the main positive circuit is further provided with a first current sensor, and the main negative circuit is further provided with a second current sensor.

[0014] As a further improvement and optimization of the present solution, the main positive circuit is further provided with a pre-charging circuit, and the pre-charging circuit includes a pre-charging contactor and a pre-charging resistor.

[0015] As a further improvement and optimization of the present solution, the main circuit also includes a charging positive contactor and a charging negative contactor. The charging positive contactor is connected in series with the main positive circuit to form a charging positive circuit, and the charging negative contactor is connected in series with the main negative circuit to form a charging negative circuit.

[0016] As a further improvement and optimization of this solution, the side of the casing is provided with an LV low-voltage control connector and an HV high-voltage collection connector, the middle of the casing is provided with a TS temperature collection connector, and the LV low-voltage control connector, HV high-voltage collection connector, and TS temperature collection connector are all installed horizontally.

[0017] Compared with the prior art, the above technical solution has the following positive effects:

[0018] (1) In this embodiment of the utility model, the auxiliary circuit is superimposed on the top of the main circuit. When the length and width of the battery pack are limited, the height space of the distribution box is fully utilized to form a double-layer structure design, so that the distribution box can accommodate the auxiliary circuit and improve the space utilization of the product.

[0019] (2) The main positive circuit and the main negative circuit of the utility model both adopt the method of connecting two series circuits in parallel, which effectively reduces the current borne by a single device, reduces the heat generation from the source, and prevents the single device and the devices in the auxiliary circuit above it from being in a high temperature state for a long time, which accelerates aging and thus reduces their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a double-layer multifunctional distribution box of the utility model;

[0021] Figure 2 This is an exploded schematic diagram of a double-layer multifunctional distribution box of the utility model;

[0022] Figure 3This is a structural view of the main circuit of a double-layer multifunctional distribution box of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the auxiliary circuit of a multifunctional distribution box with a double-layer design according to the utility model;

[0024] In the accompanying drawings: 1. Casing; 2. Auxiliary function fuse; 3. Main positive fuse; 4. Main positive contactor; 5. Second temperature sensor; 6. Charging positive contactor; 7. Main negative contactor; 8. Charging negative contactor; 9. Third temperature sensor; 10. Second current sensor; 11. Lower housing; 12. Upper housing; 13. Fuse protection cover; 20. Pre-charge contactor; 30. Pre-charge resistor; 40. First temperature sensor; 50. First current sensor; 60. Auxiliary positive bus; 70. Auxiliary positive transfer bus; 80. Auxiliary negative bus; 90. Auxiliary negative transfer bus. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, 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 the present invention can be understood according to specific circumstances.

[0028] Figure 1 This is a schematic diagram of the structure of a double-layer multifunctional distribution box of the utility model. Figure 2 This is an exploded schematic diagram of a double-layer multifunctional distribution box of the utility model. Figure 3 This is a structural view of the main circuit of a double-layer multifunctional distribution box of the utility model. Figure 4 This is a schematic diagram of the auxiliary circuit structure of a double-layer multifunctional distribution box of the utility model. Figure 1-4 As shown, a multifunctional distribution box with a double-layer design according to a preferred embodiment is shown, comprising: a casing 1, in which a main circuit and an auxiliary circuit are installed, and the auxiliary circuit is superimposed on the top of the main circuit. In this embodiment, by superimposing the auxiliary circuit on the top of the main circuit, when the length and width of the battery pack are limited, the height space of the distribution box is fully utilized to form a double-layer structure design, so that the distribution box can accommodate the auxiliary circuit and improve the space utilization rate of the product.

[0029] Furthermore, as a preferred embodiment, the main circuit includes: a main positive circuit and a main negative circuit respectively connected to the auxiliary circuit; wherein the main positive circuit includes two main positive fuses 3 and two main positive contactors 4, the two main positive fuses 3 are respectively arranged in series with the two main positive contactors 4 to form two series circuits, and the two series circuits are arranged in parallel; the main negative circuit includes two main negative contactors 7, and the two main negative contactors 7 are arranged in parallel.

[0030] In this embodiment, both the main positive circuit and the main negative circuit adopt the method of two series circuits connected in parallel, which effectively reduces the current borne by a single device, reduces the heat generation from the source, and prevents the single device and the devices in the auxiliary circuit above it from being in a high temperature state for a long time, which accelerates aging and thereby reduces their service life.

[0031] Preferably, the main positive fuse 3 and the main positive contactor 4 are connected in series via a copper bus, and the two series circuits are connected in parallel via the copper bus.

[0032] Further, as a preferred embodiment, the auxiliary circuit includes an auxiliary positive circuit connected in series with the main positive circuit and an auxiliary negative circuit connected in series with the main negative circuit.

[0033] Furthermore, as a preferred embodiment, the auxiliary positive circuit includes a plurality of auxiliary function fuses 2, and the plurality of auxiliary function fuses 2 and the main positive circuit are connected in series via an auxiliary bus.

[0034] Preferably, the auxiliary bus includes an auxiliary positive bus 60 and an auxiliary positive transfer bus 70 , a plurality of auxiliary function fuses 2 are connected in series via the auxiliary positive bus 60 , and the auxiliary positive bus 60 is connected to the main positive circuit via the auxiliary positive transfer bus 70 .

[0035] Further, as a preferred embodiment, the auxiliary negative circuit includes an auxiliary negative bus 80 , and the auxiliary negative circuit is connected to the main negative circuit via an auxiliary negative transfer bus 90 .

[0036] Furthermore, as a preferred embodiment, the casing 1 includes a lower shell 11, an upper shell 12 and a fuse protection cover 13 which are detachably connected from bottom to top, the main circuit is arranged between the lower shell 11 and the upper shell 12, and the auxiliary circuit is arranged between the upper shell 12 and the fuse protection cover 13.

[0037] Preferably, the lower shell 11 and the upper shell 12 , and the upper shell 12 and the fuse protection cover 13 are connected by screws.

[0038] Specifically, before the auxiliary positive circuit and the auxiliary negative circuit are assembled to the upper shell 12, the auxiliary positive transfer bus 70 and the auxiliary negative transfer bus 90 are assembled first, and then the parts in the auxiliary circuit are assembled to the upper shell 12 at one time. The function of the upper shell 12 is to realize the electrical isolation of the structural fixing box. In this way, the battery distribution box can achieve a double-layer structure design.

[0039] Furthermore, as a preferred embodiment, the main positive circuit is further provided with a first current sensor 50 , and the main negative circuit is further provided with a second current sensor 10 .

[0040] Furthermore, as a preferred embodiment, the main positive circuit is further provided with a pre-charging circuit, and the pre-charging circuit includes a pre-charging contactor 20 and a pre-charging resistor 30 .

[0041] Furthermore, as a preferred embodiment, the main circuit also includes a charging positive contactor 6 and a charging negative contactor 8. The charging positive contactor 6 is connected in series with the main positive circuit through a copper bus to form a charging positive circuit. The charging negative contactor 8 is connected in series with the main negative circuit through a copper bus to form a charging negative circuit.

[0042] Furthermore, as a preferred embodiment, the side of the casing 1 is provided with an LV low-voltage control connector and an HV high-voltage collection connector, the middle of the casing 1 is provided with a TS temperature collection connector, and the LV low-voltage control connector, the HV high-voltage collection connector, and the TS temperature collection connector are all installed horizontally to prevent short circuit caused by condensation.

[0043] Furthermore, as a preferred embodiment, the main positive circuit is also provided with a first temperature sensor 40, and the charging negative circuit is also provided with a third temperature sensor 9, which are used to monitor the temperature of the area with more serious heat in the high-voltage circuit; a second temperature sensor 5 is provided in the non-high-voltage circuit area in the distribution box to monitor the internal temperature of the distribution box.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional distribution box with a double-layer design, characterized in that: include: A casing, wherein a main circuit and an auxiliary circuit are installed in the casing, and the auxiliary circuit is superimposed on the main circuit; The housing comprises a lower shell, an upper shell and a fuse protection cover which are detachably connected in sequence from bottom to top; the main circuit is arranged between the lower shell and the upper shell, and the auxiliary circuit is arranged between the upper shell and the fuse protection cover.

2. The multifunctional distribution box with double-layer design according to claim 1 is characterized in that: The main circuit comprises: a main positive circuit and a main negative circuit respectively connected to the auxiliary circuit; Wherein, the main positive circuit includes two main positive fuses and two main positive contactors, the two main positive fuses are respectively arranged in series with the two main positive contactors to form two series circuits, and the two series circuits are arranged in parallel; The main negative circuit includes two main negative contactors, and the two main negative contactors are arranged in parallel.

3. The multifunctional distribution box with double-layer design according to claim 2 is characterized in that: The auxiliary circuit includes an auxiliary positive circuit connected in series with the main positive circuit and an auxiliary negative circuit connected in series with the main negative circuit.

4. The multifunctional distribution box with double-layer design according to claim 3 is characterized in that: The auxiliary positive circuit includes a plurality of auxiliary function fuses, and the plurality of auxiliary function fuses and the main positive circuit are connected in series via an auxiliary bus.

5. The multifunctional distribution box with double-layer design according to claim 4 is characterized in that: The auxiliary negative circuit includes an auxiliary negative busbar, and the auxiliary negative circuit is connected to the main negative circuit through an auxiliary negative transfer busbar.

6. The multifunctional distribution box with double-layer design according to claim 2 is characterized in that: The main positive circuit is further provided with a first current sensor, and the main negative circuit is further provided with a second current sensor.

7. The multifunctional distribution box with double-layer design according to claim 2 is characterized in that: The main positive circuit is also provided with a pre-charging circuit, and the pre-charging circuit includes a pre-charging contactor and a pre-charging resistor.

8. The multifunctional distribution box with double-layer design according to claim 2 is characterized in that: The main circuit also includes a charging positive contactor and a charging negative contactor. The charging positive contactor is connected in series with the main positive circuit to form a charging positive circuit, and the charging negative contactor is connected in series with the main negative circuit to form a charging negative circuit.

9. The multifunctional distribution box with double-layer design according to claim 1, characterized in that: The side of the casing is provided with an LV low-voltage control connector and an HV high-voltage collection connector, the middle of the casing is provided with a TS temperature collection connector, and the LV low-voltage control connector, the HV high-voltage collection connector, and the TS temperature collection connector are all installed horizontally.

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