CN206524388U - A kind of electric automobile power battery high voltage control case - Google Patents

Abstract

A high-voltage control box for electric vehicle power batteries that is easy to install and maintain, and safe to use. The positive area of the high-voltage chamber of the box is equipped with a positive discharge relay, a positive charge relay, a pre-charge relay, a pre-charge resistor and a Hall sensor, and a discharge positive relay is set in the negative area. Negative relay, charging negative relay, the low-voltage chamber of the box is equipped with a high-voltage detection unit HMU module, a battery detection unit BMU module, a temperature detection module, and an insulation detection module; the main panel of the box is equipped with a battery positive input port, a discharge positive output port, Charging positive input port, charging negative input port, battery negative input port, discharging negative output port, low-voltage power supply input port and temperature signal input port; the battery positive input port is connected with a Hall sensor, and the charging positive input port is connected with a charging positive relay. The discharge positive output port is connected with a discharge positive relay, the charge negative input port is connected with a charge negative relay, and the discharge negative output port is connected with a discharge negative relay. The utility model is suitable for electric vehicles.

Description

An electric vehicle power battery high voltage control box

technical field

The utility model relates to the control technology of a battery management system, in particular to a power battery high-voltage control box installed in a power battery management system of a high-power electric vehicle.

Background technique

In recent years, due to the non-renewability of traditional energy sources and the increasingly serious environmental pollution problems, the development and application of new energy technologies have developed rapidly, among which the application of power batteries in new energy vehicles is particularly prominent. The Chinese government attaches great importance to the development of electric vehicle technology, and adopts preferential policies to encourage the application of electric vehicles. After several years of rapid development, my country has become the world's largest new energy vehicle market, but the overall technical level of electric vehicles is still at a low level. The middle and low level, especially in terms of safety, power battery, innovation ability, core competitiveness, etc. still need to be improved.

The basic composition of electric vehicle power system can be divided into three subsystems: main energy subsystem, electric drive subsystem and auxiliary control subsystem. Among them, the main energy subsystem is composed of a power battery and an energy management system. The energy management system realizes functions such as power battery monitoring and coordinated charge and discharge control; the electric drive subsystem consists of an electronic control system, an electric drive motor, a mechanical transmission system and driving wheels, etc. The auxiliary control subsystem is composed of voltage converters, auxiliary power supplies, etc., such as power steering, air conditioning, etc.

The high-voltage box of the power battery of an electric vehicle belongs to the main energy subsystem, and is usually composed of a high-voltage box body, a high-voltage electrical circuit, and a battery management system. The high-voltage box provides guarantee for the safe and reliable operation of the power battery. Its main functions include: providing safe and reliable charging and discharging electrical circuits; real-time monitoring of battery voltage, discharging voltage, charging voltage, charging current, discharging current, battery and electrical circuit operating temperature; Timely and accurately control the disconnection or connection of each electrical circuit as required.

Since the installation space of the high-voltage box of an electric vehicle is very limited, and the terminal voltage of the battery pack is relatively high, up to 750V, the electrical insulation requirements for the electrical circuit are very high, and the insulation gap between each circuit must be large enough. Therefore, most high-voltage box products leave the limited space of the high-voltage box for the high-voltage main circuit, while auxiliary electrical circuits such as measurement circuits and control circuits can only be installed in the narrow available gaps between high-voltage electrical circuits. Ultimately, the following questions arise:

1) The electrical connection inside the high-voltage box is chaotic, and the main circuit and auxiliary circuit are mixed in a limited space at the same time, which brings great hidden dangers to electrical safety.

2) It is difficult to assemble during the production process of the high-voltage box, and it is difficult to disassemble during the maintenance process, resulting in high production and maintenance costs of the product.

3) The high-voltage main circuit of the high-voltage box has a large current passing through it during operation, which will cause complex electromagnetic interference to the auxiliary circuit.

4) The main circuit in the high-voltage box is mainly insulated by air, and the auxiliary circuit is insulated by the insulating material of the wire. Once the insulating material of the wire is worn out, high-voltage electricity will rush into the auxiliary circuit, breakdown the components on the auxiliary circuit, and then lose The control of the high-voltage main circuit will cause serious and irreversible damage to the power battery, and may even cause the power battery to burn and explode.

Contents of the invention

The utility model aims to solve the problems in the prior art of the above-mentioned high-voltage box, such as the chaotic connection of the main circuit and the auxiliary circuit in the electrical circuit, poor electrical safety and reliability, cumbersome production assembly, maintenance and disassembly, etc. Therefore, a new electric vehicle power battery high-voltage control is proposed. It has the advantages of separating the main circuit and auxiliary circuit, using PCB board instead of part of the auxiliary circuit wiring harness, reasonable structure design, small size, high safety, convenient production and maintenance, etc.

In order to solve the above problems, the technical solution adopted by the utility model is:

The power battery high-voltage control box includes an upper cover, a box body and a bottom cover. The box body is divided into upper and lower parts by a box partition. The upper part is a high-voltage chamber for installing high-voltage components, and the lower part is for installing low-voltage components. The low-voltage chamber is divided into two partitions, the positive pole area and the negative pole area. In the positive pole area, there are discharge positive relays, charge positive relays, pre-charge relays, pre-charge resistors and Hall In the negative pole area, a discharge negative relay and a charge negative relay installed on the negative PCB board are arranged; a high voltage detection unit HMU module, a battery detection unit BMU module, a temperature detection module, and an insulation detection module are installed in the low voltage chamber. module; a main panel is provided on the outside of the box, the main panel connected to the high-pressure chamber is provided with a high-pressure interface area, and the main panel connected to the low-pressure chamber is provided with a low-pressure interface area; The high-voltage interface area is provided with a battery positive input port, a discharge positive output port, a charge positive input port, a charge negative input port, a battery negative input port, and a discharge negative output port. The low-voltage interface area is provided with a low-voltage power supply input port, Temperature signal input port;

The battery positive input port is electrically connected to one end of the Hall sensor, the other end of the Hall sensor is electrically connected to the positive busbar, the charging positive input port is electrically connected to one end of the charging positive relay, and the charging positive The other end of the relay is electrically connected to the positive bus bar, the discharge positive output port is electrically connected to one end of the positive discharge relay, the other end of the positive discharge relay is electrically connected to the positive bus bar, and the pre-charge relay connected in parallel with the pre-charging resistor at both ends of the positive discharge relay; the negative input port of the battery is electrically connected to the negative bus bar, and the negative input port of the charging is electrically connected to one end of the negative charging relay; The other end of the charging negative relay is electrically connected to the negative busbar, the discharge negative output port is electrically connected to one end of the discharging negative relay, and the other end of the discharging negative relay is electrically connected to the negative busbar;

On the positive PCB board, the discharge positive relay, the charging positive relay, the control terminal of the pre-charge relay and the current signal output terminal of the Hall sensor are collected into one through the wiring on the positive PCB board. On the public positive adapter socket;

The control terminals of the discharging negative relay and the charging negative relay on the negative PCB board are collected into a common negative switching socket through the wiring on the negative PCB board;

The positive transition socket and the negative transition socket are respectively connected to corresponding ports on the HMU module in the low-voltage chamber through a patch cable through a wire hole provided on the box partition, and the The temperature detection module and the insulation detection module are respectively connected to the BMU module through a communication cable, the HMU module is connected to the BMU module through a communication cable, and the low-voltage power supply input port on the low-voltage interface area is connected to the BMU module. The power input terminals of each low-voltage component are connected, and the temperature signal input port is connected with the BMU module through a communication cable.

The preferred mode of the utility model is:

The low-voltage interface area is also provided with a fan power input port, a fan power output port, a vehicle communication interface, an internal network interface, and a debugging interface. The other end of the fan relay is connected to the fan power output port, and the vehicle communication interface, the internal network interface and the debugging interface are respectively connected to the BMU module through communication cables.

In the high-voltage interface area, there are three two-core interfaces of an air-conditioning output port, a standby output port, and an electric defrosting output port, and a multi-core interface at the defrosting control signal input port. The positive core of the air-conditioning output port is connected to the The discharge positive output port is electrically connected, the negative core of the air conditioner output port is electrically connected to one end of the auxiliary fuse arranged in the negative area, and the other end of the auxiliary fuse is electrically connected to the discharge negative output port; the spare The positive core of the output port is electrically connected to one end of the auxiliary relay arranged in the positive area, the other end of the auxiliary relay is electrically connected to the discharge positive output port, and the negative core of the backup output port is connected to the auxiliary relay located in the negative area. One end of the fuse is electrically connected, the other end of the auxiliary fuse is electrically connected to the discharge negative output port; the positive core of the electric defrosting output port is electrically connected to one end of the auxiliary relay arranged in the positive area, and the The other end of the auxiliary relay is electrically connected to the discharge positive output port, the negative core of the electric defrosting output port is electrically connected to one end of the auxiliary fuse arranged in the negative area, and the other end of the auxiliary fuse is connected to the The discharge negative pole output port is electrically connected.

Two battery positive input ports, two charging positive input ports, two charging negative input ports, and two battery negative input ports are provided in the high-voltage interface area, and two charging positive relays, two charging positive relays, and two a Hall sensor, two charging negative relays are arranged in the negative pole area; the battery positive input port is electrically connected to one end of the Hall sensor, and the other end of the Hall sensor is electrically connected to the positive busbar , the charging positive input port is electrically connected to one end of the charging positive relay, the other end of the charging positive relay is electrically connected to the positive bus bar; the battery negative input port is electrically connected to the negative bus bar, the The charging negative input port is electrically connected to one end of the charging negative relay, and the other end of the charging negative relay is electrically connected to the negative busbar; the battery positive input port is electrically connected to one end of the Hall sensor, and the The other end of the Hall sensor is electrically connected to the positive busbar, the charging positive input port is electrically connected to one end of the charging positive relay, the other end of the charging positive relay is electrically connected to the positive busbar, and the battery The negative input port is electrically connected to the negative bus bar, the charging negative input port is electrically connected to one end of the charging negative relay, and the other end of the charging negative relay is electrically connected to the negative bus bar.

The side adjacent to the main panel on the outside of the box is provided with a manual switch panel, and two manual switches are installed on the manual switch panel, and the battery negative input port is electrically connected to one end of the manual switch. The other end of the manual switch is electrically connected to the negative busbar; the battery negative input port is electrically connected to one end of the manual switch, and the other end of the manual switch is electrically connected to the negative busbar.

Two HMU modules are installed in the low-voltage chamber.

In the positive area, an insulator is provided on the box partition, and a metal positive mounting tray with the same size as the positive PCB is erected on the insulator, and the positive PCB is a single-sided PCB. Wherein the non-wiring side is installed facing the positive installation tray, the positive high-voltage components are installed on the positive PCB, and the low-voltage components are installed in the low-voltage chamber below the box partition.

In the negative electrode area, an insulator is arranged on the box partition, and a metal negative electrode installation tray with the same size as the negative electrode PCB board is erected on the insulator, and the negative electrode PCB board is a single-sided PCB board, Wherein the non-wiring side is installed facing the negative electrode installation tray, the negative electrode high voltage components are installed on the negative electrode PCB, and the low voltage components are installed in the low voltage chamber below the box partition.

Two control line output ports, two sampling line output ports, and a binding line extraction bridge are also arranged in the low-voltage chamber.

An upper cover and a bottom cover matched with the box body are provided, and waterproof rubber strips for the upper cover and waterproof rubber strips for the bottom cover are provided respectively between the upper cover and the box body and between the box body and the bottom cover.

Compared with the prior art, the utility model has the beneficial effects as follows:

1. The high voltage box adopts the design of high and low voltage separation, which avoids the complex electromagnetic interference caused by the large current of the main circuit to the auxiliary circuit.

2. The design of the wire binding draw bridge in the low-voltage room solves the problem of fixing the wire harness in the low-voltage room and the problem of messy wiring, and also avoids the hidden danger of poor contact caused by the loose connection of the wire harness due to the shaking of the wire harness, and improves the reliability of the control and security.

3. The electrical components of the main circuit in the high-voltage chamber adopt the installation method of insulators, installation trays and circuit boards, which not only solves the electrical insulation problem between the positive pole, negative pole and the box of the main circuit, but also solves the problem of the sampling line in the high-voltage chamber. And the problem of confusing control line wiring.

4. In the high-voltage room, the positive and negative PCB boards are used to replace part of the wiring harness, which solves the problem of chaotic wiring inside the high-voltage control box, and at the same time shortens the workload of production assembly and maintenance and disassembly, and reduces the possibility of errors during installation. probability.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Fig. 1 is the structural decomposition schematic diagram of a specific embodiment of the present utility model;

Fig. 2 is a schematic diagram of the electrical connection of the high-voltage main circuit of a specific embodiment of the present invention;

Fig. 3 is a sectional view of a high-voltage control box of a specific embodiment of the present invention;

Fig. 4 is a schematic diagram of the arrangement of high-voltage components in a high-pressure chamber according to a specific embodiment of the present invention;

Fig. 5 is a schematic diagram of the arrangement of low-voltage components in a low-voltage chamber of a specific embodiment of the present invention;

Fig. 6 is a schematic diagram of the layout of the external interface of the high-voltage control box according to a specific embodiment of the present invention.

Among the reference signs: I - positive pole area, II - negative pole area, III - high voltage interface area, IV - low voltage interface area, V - high voltage components, VI - low voltage components;

1-top cover, 2-box body, 3-bottom cover, 4-box partition, 5-high pressure room, 6-low pressure room, 7-main panel, 8-manual switch panel, 9-top cover waterproof strip , 10-bottom cover waterproof strip;

401-wire hole, 501a, 501b-discharging positive relay, 502-charging positive relay, 503-pre-charging relay, 504, 504a, 504b-charging negative relay, 505-discharging negative relay, 506, 506a, 506b, 506c- Auxiliary fuse, 507-negative PCB, 508-positive PCB, 509, 509a, 509b-auxiliary relay, 510-pre-charging resistor, 511, 511a, 511b-Hall sensor, 512-positive bus, 513-negative bus , 514-positive adapter socket, 515-negative adapter socket, 516-insulator, 517, 517a-positive installation tray, 517b-negative installation tray, 601-fan relay, 602, 602a, 602b-control line output port, 603 , 603a, 603b-HMU module, 604-temperature detection module, 605, 605a, 605b-sampling line output port, 606-binding wire extraction bridge, 607-insulation detection module, 608-BMU module, 701a, 701b-battery positive input 702 - discharge positive output port, 703, 703a, 703b - charging positive input port, 704 - air conditioner output port, 705 - spare output port, 706 - defrosting control signal input port 707,, 707a, 707b - charging negative input port 708 - electric defrosting output port, 709, 709a, 709b - battery negative input port, 710 - discharge negative output port, 711 - fan power input port, 712 - fan power output port, 713 - vehicle communication interface, 714 - Low voltage power supply input port, 715 - temperature signal input port, 716 - internal network interface, 717 - debugging interface, 801, 801a, 801b - manual switch.

detailed description

Figure 1 shows a specific embodiment of the utility model for the high-voltage control box of the electric vehicle power battery. In order to increase the capacity of the power battery, the high-voltage control box provided by the utility model is set as two sets of power battery input, and one circuit after parallel connection At the same time, two sets of charging loops, two sets of measurement sampling loops, and two sets of control loops are designed for the two sets of power batteries, so as to speed up the charging and accurately sample and control. The schematic diagram of the electrical connection of the high-voltage main circuit in this embodiment is shown in FIG. 2 .

The high-voltage control box provided by the utility model includes an upper cover 1, a box body 2 and a bottom cover 3. The box body 2 is divided into upper and lower parts by a box partition 4. The upper part is a high-voltage chamber 5 for installing high-voltage components V, The lower part is a low-voltage chamber 6 for installing low-voltage components VI, as shown in FIG. 3 . FIG. 4 is a schematic diagram of the arrangement of high-voltage components V in the high-voltage chamber 5 . The high-pressure chamber 5 is divided into two subregions, the positive electrode area I and the negative electrode area II. In the positive area I, there are a discharge positive relay 501 installed on the positive PCB board 508, two charging positive relays 502a and 502b, a pre-charging relay 503, a pre-charging resistor 510, two Hall sensors 511a and 511b, two auxiliary Relays 509a and 509b, positive busbar 512; in the negative zone II, there are discharge negative relay 505 installed on the negative PCB board 507, two charging negative relays 504a and 504b, three auxiliary fuses 506a, 506b and 506c, and negative busbar 513. As shown in FIG. 5 , a fan relay 601 , two HMU modules 603 a and 603 b , a temperature detection module 604 , an insulation detection module 607 , and a BMU module 608 are installed in the low-voltage chamber 6 .

A main panel 7 is arranged on the outside of the box body 2, as shown in Figure 6, the main panel 7 connected to the high pressure chamber 5 is provided with a high pressure interface area III, and the main panel 7 connected to the low pressure chamber 6 is provided with a low pressure interface area IV ; In the high-voltage interface area III, there are two battery positive input ports 701a and 701b, a discharge positive output port 702, two charging positive input ports 703a and 703b, an air conditioner output port 704, a backup output port 705, and a defrosting control signal input. port 706, two charging negative pole input ports 707a, 707b, electric defrosting output port 708, two battery negative pole input ports 709a, 709b, discharge negative pole output port 710; in the low-voltage interface area IV, fan power input ports 711, Fan power output port 712 , vehicle communication port 713 , low voltage power supply input port 714 , temperature signal input port 715 , internal network port 716 and debugging port 717 .

A manual switch panel 8 is provided on the side adjacent to the main panel 7 outside the box body 2 , and two manual switches 801 a and 801 b are mounted on the manual switch panel 8 . The purpose of installing the manual switch is to avoid the danger of electric shock caused by improper operation and the damage of components caused by overload and short circuit, and to protect the power battery. In case of emergency or battery maintenance, the power battery can be cut off in time to effectively avoid Electric shock caused by improper operation of maintenance personnel.

As shown in Figure 2, the battery positive input port 701a is electrically connected to one end of the Hall sensor 511a, the other end of the Hall sensor 511a is electrically connected to the positive bus bar 512, and the charging positive input port 703a is electrically connected to one end of the charging positive relay 502a. The other end of the charging positive relay 502a is electrically connected to the positive bus bar 512; the battery positive input port 701b is electrically connected to one end of the Hall sensor 511b, the other end of the Hall sensor 511b is electrically connected to the positive bus bar 512, and the charging positive input port 703b is connected to the charging port. One end of the positive relay 502b is electrically connected, the other end of the charging positive relay 502b is electrically connected to the positive bus 512; the discharge positive output port 702 is electrically connected to one end of the discharging positive relay 501, and the other end of the discharging positive relay 501 is electrically connected to the positive bus 512 , the pre-charging relay 503 and the pre-charging resistor 510 are connected in parallel at both ends of the positive discharging relay 501 after being connected in series.

The battery negative input port 709a is electrically connected to one end of the manual switch 801a, the other end of the manual switch 801a is electrically connected to the negative bus bar 513, the charging negative input port 707a is electrically connected to one end of the charging negative relay 504a, and the other end of the charging negative relay 504a is electrically connected to the charging negative relay 504a. Negative bus bar 513 is electrically connected; battery negative input port 709b is electrically connected to one end of manual switch 801b, the other end of manual switch 801b is electrically connected to negative bus bar 513, charging negative input port 707b is electrically connected to one end of charging negative relay 504b, charging negative The other end of the relay 504 b is electrically connected to the negative bus bar 513 ; the discharge negative output port 710 is electrically connected to one end of the discharge negative relay 505 , and the other end of the discharge negative relay 505 is electrically connected to the negative bus bar 513 .

The air conditioner output port 704, the backup output port 705, and the electric defrosting output port 708 are three two-core interfaces. One end of the auxiliary fuse 506c in the district II is electrically connected, and the other end of the auxiliary fuse 506c is electrically connected with the discharge negative output port 710; the positive core of the spare output port 705 is electrically connected with one end of the auxiliary relay 509b arranged in the positive area I, The other end of the auxiliary relay 509b is electrically connected to the discharge positive output port 702, the negative core of the spare output port 705 is electrically connected to one end of the auxiliary fuse 506b arranged in the negative zone II, and the other end of the auxiliary fuse 506b is electrically connected to the discharge negative electrode. The output port 710 is electrically connected; the positive core of the electric defrosting output port 708 is electrically connected to one end of the auxiliary relay 509a arranged in the positive area I, and the other end of the auxiliary relay 509a is electrically connected to the discharge positive output port 702, and the electric defrosting output port The negative pole core of 708 is electrically connected to one end of the auxiliary fuse 506a arranged in the negative pole area II, and the other end of the auxiliary fuse 506a is electrically connected to the discharge negative output port 710 .

A main feature of the utility model is to replace part of the low-voltage wiring harness with a PCB board, such as the control line of the relay, the current sampling line, etc. On the positive PCB board 508, a discharge positive relay 501, The control line sockets of the positive charging relays 502a and 502b, the pre-charging relay 503, and the current signal receiving sockets of the Hall sensors 511a, 511b are connected to the positive discharging relay 501, the positive charging relays 502a, 502b, and the pre-charging relays 501, 502b, and The control terminal of the charging relay 503 is connected to the current signal output terminals of the Hall sensors 511a, 511b, and all the control line sockets and current signal receiving sockets are collected into a common positive adapter socket 514 through the wiring on the positive PCB board 508 .

On the negative PCB board 507, the control line sockets of the discharge negative relay 505 and the charge negative relay 504a, 504b are respectively arranged near the position V of the corresponding high-voltage components. The control terminals of the relays 504a and 504b are connected, and all the control line sockets are collected to a common negative pole transfer socket 515 through the wiring on the negative pole PCB board 507 .

The positive adapter socket 514 and the negative pole adapter socket 515 are respectively connected to the corresponding ports on the HMU modules 603a and 603b in the low-voltage chamber 6 through the cable holes 401 provided on the box partition 4 through cables with plugs. , the temperature detection module 604 and the insulation detection module 607 are respectively connected to the BMU module 608 through communication cables, the HMU modules 603a and 603b are also connected to the BMU module 608 through communication cables, and the low-voltage power supply input port 714 on the low-voltage interface area IV is connected to each The power input terminal on the low-voltage component VI is connected, and the temperature signal input port 715 is connected to the BMU module 608 through a communication cable.

The fan power input port 711 is connected to one end of the fan relay 601 arranged in the low-voltage chamber 6, and the other end of the fan relay 601 is connected to the fan power output port 712. The communication cable is connected to the BMU module 608 .

In order to fix the wire harness in the low-voltage chamber 6, a wire-binding bridge 606 is also provided in the low-voltage chamber 6, and the wire harness is fixed on the wire-binding bridge 606 with cable ties. There is a phenomenon that the connection of the wiring harness is loose due to vibration, resulting in poor contact.

In order to increase the electrical gap between the high-voltage components V and the low-voltage components VI, the utility model adopts a special design. In the positive region I, an insulator 516 is arranged on the box partition 4, and the size and The positive pole PCB board 508 is made of the same metal positive pole installation tray 517a, and the positive pole PCB board 508 is a single-sided PCB board, wherein the non-wiring side is installed towards the positive pole installation tray 517a, and the positive pole high voltage component V is installed on the positive pole PCB board 508. A low-voltage component VI is installed in the low-voltage chamber 6 below the box partition 4 . For the negative pole II, install it in the same way. Through such a design, the electrical gap between the high-voltage components and the low-voltage components is improved, electromagnetic interference is greatly reduced, and the reliability and safety of the auxiliary circuit work are improved. The metal mounting tray can effectively prevent the firmness and stability of the installation of high-voltage components, and there will be no vibration of high-voltage components due to the shaking of the car during operation. The problem of loose contacts in rigid electrical connections is avoided, thereby improving the reliability of the high-voltage control box.

In order to improve the convenience of production, installation and maintenance of the high-voltage control box, two control line output ports 602a, 602b, two sampling line output ports 605a, 605b are also provided in the low-voltage chamber 6, and the electrical circuits of the two sets of power batteries For example, the control wires in the charging circuit are respectively crimped with two cable plugs, and are connected to the above-mentioned two control wire output ports 602a, 602b. Similarly, the sampling lines in the two detection circuits are also crimped with two cable plugs respectively, and are connected to the above-mentioned two sampling line output ports 605a, 605b, and the two control line output ports 602a, 602b are respectively passed through the wires with plugs. The cable is connected to the two HMU modules 603a, 603b, and the two sampling line output ports 605a, 605b are connected to the BMU module 608 through cables with connectors. In this way, in the process of installation and maintenance, the problem of heavy workload and easy to make mistakes caused by the need to connect the control line and sampling line one by one is solved, and the convenience of production, installation and maintenance is greatly increased.

In order to improve the waterproof and moisture-proof performance of the high-voltage control box, an upper cover waterproof rubber strip 9 and a bottom cover waterproof rubber strip 10 are respectively placed between the upper cover 1 and the box body 2 and between the box body 2 and the bottom cover 3 . Fix the upper cover 1, the upper cover waterproof strip 9, the box body 2, the bottom cover waterproof strip 10, and the bottom cover 3 with bolts in order to form a complete power battery high-voltage control box.

After the high-voltage control box of the power battery is assembled according to the above method, the battery positive input ports 701a and 701b are respectively connected to the positive poles of the power battery packs 1 and 2, and the battery negative pole input ports 709a and 709b are respectively connected to the negative poles of the power battery packs 1 and 2. The charging positive input ports 703a and 703b are respectively connected to the positive output terminals of chargers 1 and 2, the charging negative input ports 707a and 707b are respectively connected to the negative output terminals of chargers 1 and 2, and the discharging positive output port 702 is connected to the electric vehicle The positive input terminal of the DC motor is connected, the discharge negative output terminal 710 is connected with the negative input terminal of the DC motor of the electric vehicle, the air conditioner output port 704 is connected with the vehicle air conditioner power input port, and the electric defrosting output port 708 is connected with the power supply of the vehicle electric defroster The input port is connected, and the spare output port 705 can be connected to the power input port of other electric appliances. The defrosting control signal input port 706 is connected to the defrosting control signal output port of the electric vehicle management system; the fan input port 711 is connected to the output port of the auxiliary power supply, the fan output port 712 is connected to the power input port of the fan in the car, and the low-voltage power supply input Port 714 is connected to the output port of the auxiliary power supply. The fan and low-voltage components are powered by the auxiliary battery to improve the reliability of the high-voltage control box and prevent the entire high-voltage control box from losing power and losing control of the power battery when the power battery fails. . The temperature signal input port 715 is connected to the temperature sensor of the power battery, and the vehicle communication interface 713 and the internal network interface 716 are connected to corresponding interfaces on the electric vehicle management system. The debugging interface 717 is only used for debugging the high-voltage control box during production and maintenance, and it is usually vacant.

The high-voltage control box of the electric vehicle power battery in this embodiment adopts the separation of the high-voltage chamber and the low-voltage chamber, and uses a PCB board to replace part of the design of the low-voltage wiring harness of the control line and the sampling line, which solves the problem of messy wiring, large electromagnetic interference, and problems in the prior art. The shortcomings of poor control reliability, insufficient safety of components, and inconvenient production and maintenance. At the same time, it also adopts two-way power battery charging circuit, two-way control and two-way detection circuit design, which can control two sets of power batteries at the same time and combine them into one output. It has the advantages of large capacity, fast charging speed, accurate measurement and precise control.

The above content only describes the structure of the utility model in detail through the specific example of the high-voltage control box of the power battery. Those skilled in the art can make any modification, supplement or replace it in a similar way to the specific example described, as long as it does not deviate from this specification. The structure of the utility model or beyond the scope defined in the claims shall belong to the protection scope of the utility model.

Claims (10)

1. a kind of electric automobile power battery high voltage control case, with casing (2), it is characterised in that the casing box partition (4) two parts above and below being separated into, top is divided into the hyperbaric chamber (5) for installing high pressure component V, and bottom is divided into for installing low The low-pressure chamber (6) of component (VI) is pressed, the hyperbaric chamber is divided into positive polar region (I) and negative pole area (II), set in the positive polar region There is the positive relay of electric discharge (501) on positive pole pcb board (508), charge positive relay (502), preliminary filling relay (503), preliminary filling resistance (510) and Hall sensor (511), are provided with negative pole pcb board (507) in the negative pole area Electric discharge bear relay (505), the negative relay (504) of charging, high-pressure detection unit HMU modules are installed in the low-pressure chamber (603), battery detection unit BMU modules (608), temperature detecting module (604), insulation monitoring module (607)；Outside the casing Side is provided with main panel (7), and the main panel corresponds to the hyperbaric chamber and the region of low-pressure chamber and is respectively arranged with high-voltage connecting mouth region And low-voltage interface area (IV) (III)；The high-voltage connecting mouth region is provided with anode input port (701), electric discharge positive pole delivery outlet (702), charging positive pole input port (703), charging negative pole input port (707), GND input port (709), electric discharge negative pole are defeated Export (710), the low-voltage interface area is provided with low-voltage power supply input port (714), temperature signal input port (715)；

The anode input port (701) electrically connects with one end of Hall sensor (511), the other end of Hall sensor with Positive electrode bus (512) is electrically connected, and one end of charging positive pole input port (703) and the positive relay (502) of charging is electrically connected Connect, the other end of the positive relay (502) of charging is electrically connected with the positive electrode bus (512), the electric discharge positive pole delivery outlet (702) one end with the positive relay (501) of the electric discharge electrically connect, the other end of the positive relay (501) of discharging with it is described Positive electrode bus (512) is electrically connected, and described put is connected in parallel on after the preliminary filling relay (503) and the preliminary filling resistance (510) series connection The two ends of electric positive relay (501)；The GND input port (709) electrically connects with negative electrode bus (513), and the charging is negative Pole input port (707) is electrically connected with one end of the negative relay (504) of the charging, and the another of relay (504) is born in the charging End is electrically connected with the negative electrode bus (513), the electric discharge negative pole delivery outlet (710) and the negative relay (505) of the electric discharge One end is electrically connected, and the other end of the negative relay (505) of electric discharge is electrically connected with the negative electrode bus (513)；

The positive relay (501) of electric discharge, the positive relay (502) of charging, the preliminary filling on the positive pole pcb board (508) The control end of relay (503) and the current signal output end of the Hall sensor (511) pass through the positive pole pcb board (508) wiring on is pooled on a public positive pole multi-tap (514)；

The control of the negative relay (505) of electric discharge and the negative relay (504) of the charging on the negative pole pcb board (507) End is pooled on a public negative pole multi-tap (515) by the wiring on the negative pole pcb board (507)；

The positive pole multi-tap (514) and the negative pole multi-tap (515) are passed through by patch cables be arranged on case respectively Cable-through hole (401) on body dividing plate (4) is connected with the corresponding port on the HMU modules (603) in the low-pressure chamber (6), The temperature detecting module (604) and the insulation monitoring module (607) pass through communication cable and the BMU modules respectively (608) it is connected, the HMU modules (603) are connected by communication cable with the BMU modules (608), in the low-voltage interface area The low-voltage power supply input port (714) be connected with the power input of each low-voltage component (VI), temperature signal input Mouth (715) is connected by communication cable with the BMU modules (608).

2. electric automobile power battery high voltage control case according to claim 1, it is characterised in that in the low-voltage interface Area (IV) is additionally provided with fan power supply input port (711), fan power supply delivery outlet (712), vehicle communication interface (713), Intranet Interface (716) and debugging interface (717), the fan power supply input port (711) is by cable and is arranged on the low-pressure chamber (6) One end of interior cooling fan relay (601) is connected, the other end and the fan power supply delivery outlet of the cooling fan relay (601) (712) it is connected, the vehicle communication interface (713), the interior network interface (716) and the debugging interface (717) pass through respectively Communication cable is connected with the BMU modules (608).

3. electric automobile power battery high voltage control case according to claim 1, it is characterised in that in the high voltage interface Area is additionally provided with air-conditioning delivery outlet (704), standby delivery outlet (705), electricity defrosting (708) three two core interfaces of delivery outlet and defrosting The multicore interface of control signal input port (706) one, the positive pole piece of the air-conditioning delivery outlet (704) and the electric discharge positive pole output Mouth (702) electrical connection, the one of auxiliary fuse (506c) of the negative pole core of the air-conditioning delivery outlet (704) with being arranged on negative pole area End electrical connection, the other end of the auxiliary fuse (506c) is electrically connected with the electric discharge negative pole delivery outlet (710)；It is described standby One end of auxiliary relay (509b) of the positive pole piece of delivery outlet (705) with being arranged on positive polar region (I) is electrically connected, it is described auxiliary after The other end of electrical equipment (509b) is electrically connected with the electric discharge positive pole delivery outlet (702), the negative pole core of the standby delivery outlet (705) One end of auxiliary fuse (506b) with being arranged on negative pole area (II) is electrically connected, the other end of the auxiliary fuse (506b) Electrically connected with the electric discharge negative pole delivery outlet (710)；The positive pole piece of the electricity defrosting delivery outlet (708) is with being arranged on positive polar region (I) one end electrical connection of auxiliary relay (509a), the other end and the electric discharge positive pole of the auxiliary relay (509a) Delivery outlet (702) is electrically connected, the negative pole core of the electricity defrosting delivery outlet (708) and the auxiliary fuse for being arranged on negative pole area (II) One end electrical connection of (506a), the other end of the auxiliary fuse (506a) is electrically connected with the electric discharge negative pole delivery outlet (710) Connect.

4. electric automobile power battery high voltage control case according to claim 1, it is characterised in that in the high voltage interface Area (III) be provided with two anode input ports (701a, 701b), two charging positive pole input port (703a, 703b), two Charging negative pole input port (707a, 707b), two GND input ports (709a, 709b), two are provided with the positive polar region The individual positive relay (502a, 502b) of charging, two Hall sensors (511a, 511b), two are provided with the negative pole area (II) The individual negative relay (504a, 504b) of charging；The anode input port (701a) and the one of the Hall sensor (511a) End electrical connection, the other end of the Hall sensor (511a) is electrically connected with the positive electrode bus (512), and the charging positive pole is defeated Entrance (703a) is electrically connected with one end of the positive relay (502a) of charging, the other end of the positive relay (502a) of charging Electrically connected with the positive electrode bus (512), the GND input port (709a) electrically connects with the negative electrode bus (513), Charging negative pole input port (707a) electrically connects with one end of the negative relay (504a) of the charging, the negative relay of charging The other end of (504a) is electrically connected with the negative electrode bus (513)；The anode input port (701b) passes with the Hall One end electrical connection of sensor (511b), the other end of the Hall sensor (511b) is electrically connected with the positive electrode bus (512), Charging positive pole input port (703b) electrically connects with one end of the positive relay (502b) of charging, the positive relay of charging The other end of (502b) is electrically connected with the positive electrode bus (512), and the GND input port (709b) is female with the negative pole Line (513) is electrically connected, and charging negative pole input port (707b) electrically connects with one end of the negative relay (504b) of the charging, institute The other end for stating the negative relay (504b) of charging is electrically connected with the negative electrode bus (513).

5. electric automobile power battery high voltage control case according to claim 1, it is characterised in that with casing outside The adjacent side of the main panel be provided with hand switch panel (8), two hands are installed on the hand switch panel Dynamic switch (801a, 801b), the GND input port (709a) electrically connects with one end of the hand switch (801a), institute The other end for stating hand switch (801a) is electrically connected with the negative electrode bus (513)；The GND input port (709b) with One end electrical connection of the hand switch (801b), the other end and the negative electrode bus (513) of the hand switch (801b) Electrical connection.

6. electric automobile power battery high voltage control case according to claim 1, it is characterised in that in the low-pressure chamber Two HMU modules (603a and 603b) are installed.

7. electric automobile power battery high voltage control case according to claim 1, it is characterised in that in the positive polar region, Insulator (516) is provided with the box partition (4), size and the positive pole pcb board are set up on the insulator (516) (508) identical metal positive pole installs pallet (517a), and the positive pole pcb board (508) is one side pcb board, wherein non-wiring One face the positive pole pallet (517a) be installed and install, positive extra-high voltage component V is installed on the positive pole pcb board (508), The low pressure indoor location low-voltage component (VI) below the box partition.

8. electric automobile power battery high voltage control case according to claim 1, it is characterised in that in the negative pole area, Insulator (516) is provided with the box partition, size and negative pole pcb board (507) phase are set up on the insulator Same metal negative pole installs pallet (517b), and the negative pole pcb board (507) is one side pcb board, wherein the one of non-wiring faces The negative pole is installed pallet (517b) and installed, and negative pole high pressure component (V) is installed on the negative pole pcb board (507), described The low pressure indoor location low-voltage component (VI) below box partition.

9. electric automobile power battery high voltage control case according to claim 1, it is characterised in that in the low-pressure chamber It is additionally provided with two management and control line delivery outlets (602a, 602b), two sampling line delivery outlets (605a, 605b) and wiring and takes out bridge (606)。

10. electric automobile power battery high voltage control case according to claim 1, it is characterised in that provided with the casing The upper lid (1) and bottom (3) coordinated, pad is provided with upper lid waterproof respectively between the upper lid and casing and between casing and bottom Adhesive tape (9) and bottom waterproof adhesive tape (10).