CN205622080U - Battery system control case - Google Patents

Abstract

The utility model relates to a battery system control case, including the box to and install at inside low pressure controlgear and the high -pressure charge -discharge electric device of box, low pressure controlgear fixes on a lateral wall of box, and high -pressure charge -discharge electric device installs the bottom at the box. When relevant device in the control box breaks down, only need open this control box, to its carry on maintenance and repair can, need not disassemble the battery box specially, also influence battery box safety and sealed problem with regard to not existing, so battery management system and high voltage component can effectively be safeguarded and maintain to this independent control box. In this control box, with controlgear and components and parts setting in the position of two differences, when the maintenance or when changing one of them part, can not influence another part, guaranteed the normal work of other parts, convenient subsequent maintenance.

Description

A battery system control box

technical field

The utility model relates to a battery system control box.

Background technique

Due to the characteristics of cleanliness and environmental protection, electric vehicles will become an important trend in the development of electric vehicles in the future. Among them, the power battery, as the energy storage unit of the electric vehicle, plays an important role in providing power for each load of the vehicle. The power battery has high voltage and high power, which has certain dangers. In order to ensure the safe operation of electric vehicles, it is necessary to distribute current to each electrical circuit, and realize the control of each circuit through relays or relays, and realize the control of each circuit through fuses or fuses. circuit security.

In the prior art, one way is to install all high-voltage components such as battery management system control boards, relays, and fuses inside the battery box, which is inconvenient for maintenance and maintenance of high-voltage components. When the internal components of the battery box fail, the entire battery box needs to be disassembled. Due to the heavy weight of the battery box, the maintenance of the components is difficult, and it is not conducive to the safety and sealing of the battery box. Another way is to separate the battery management system from the high-voltage components, and realize the control of the high-voltage components through the low-voltage wiring harness. This method requires a long control wiring harness to realize the control of the loop, which is not conducive to the safety and reliability of the control.

Utility model content

The purpose of the utility model is to provide a battery system control box to solve the problem of inconvenient maintenance caused by installing the battery management system and high-voltage components in the battery box.

To achieve the above purpose, the solution of the present invention includes: a battery system control box, including a box body, and low-voltage control equipment and high-voltage charging and discharging electrical devices installed inside the box body, and the low-voltage control equipment is fixed on the bottom of the box body On one side wall, the high-voltage charging and discharging electrical device is installed at the bottom of the box.

The other side wall of the box is provided with a power socket and a communication socket, the power socket is correspondingly connected to the low-voltage control equipment through the corresponding high-voltage charging and discharging electrical device, and the communication socket is correspondingly connected to the low-voltage control equipment .

The low-voltage control equipment is fixed on the rear side wall of the box body, and the power socket and communication socket are arranged on the front side wall of the box body.

The high-voltage charging and discharging electrical device is fixedly installed on a mounting board, and the mounting board is insulated and mounted on the bottom of the box.

A line groove parallel to the bottom of the box is fixedly installed on the upper edge of the box.

The four corners of the bottom of the box corresponding to the mounting plate are all provided with pads, and the four corners of the mounting plate are correspondingly fixed on the pads.

The box body is correspondingly provided with a box cover, and a layer of sealing gasket is pasted between the box cover and the box body.

The material of the gasket is foamed EPDM.

Copper bars are used for power connection between the high-voltage charging and discharging electrical devices.

The high-voltage charging and discharging electrical device includes a Hall current sensor, a power supply positive relay, a power supply negative relay, and a charging relay. There is a power line connected in series between a main line and the contacts of the negative relay of the power supply connected between the negative sockets, the main line includes a power supply line and a charging line arranged in parallel, The contacts of the relay are connected in series with a power supply branch, and the power supply branch includes an air conditioner power supply branch, a defrosting power supply branch and a discharge branch arranged in parallel, and the air conditioner socket and the air conditioner are arranged in series on the air conditioner power supply branch. A branch fuse, the defrosting socket and the defrosting branch fuse are connected in series on the defrosting power supply branch, the discharge socket is connected in series on the discharging branch; the charging circuit is connected in series The contacts of the relay, the charging socket and the charging line fuse; the control device includes a battery management system, and the battery management system controls and connects the positive relay of the power supply, the negative relay of the power supply and the charging relay; the Hall current sensor is used for Detecting the current on the power line, the battery management system samples and connects the Hall current sensor; the communication socket is connected to the communication port on the battery management system; the air-conditioning branch fuse and the defrosting branch fuse are blown The fuse, the charging line fuse and the Hall current sensor are all fixed on the mounting plate through the insulating mounting support.

The utility model provides a control box specially matched with the battery system, which is equipped with control equipment, related electrical components and connecting lines inside. The control box is an independent control equipment, and the inside does not involve the battery system. The system is divided into two devices. When the relevant components in the control box fail, you only need to open the control box to maintain and repair it, and there is no need to disassemble the battery box, so there is no problem affecting the safety and sealing of the battery box. Therefore, the independent control box can effectively maintain and maintain the battery management system and high-voltage components, and when some components fail, it can be easily repaired and replaced; in addition, in the control box, the control equipment and components are set In two different positions, when one part is repaired or replaced, the other part will not be affected, which ensures the normal operation of other parts and facilitates subsequent maintenance and repair.

Description of drawings

Figure 1 is a perspective view of the exterior of the control box;

Fig. 2 is the three-dimensional schematic view of the control box with the box cover removed;

Fig. 3 is a sectional view inside the control box;

Figure 4 is a schematic diagram of the front panel of the control box;

Figure 5 is a schematic diagram of the electrical connection circuit of the control box.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

The battery system control box provided by the utility model can be applied to an electric vehicle, and this embodiment takes the application to a pure electric bus as an example.

As shown in FIGS. 1 and 2 , it is a three-dimensional schematic view of the battery system control box, which includes a box body 1 and a box cover 2 . As shown in Figure 3, inside the box body 1, there is an electrical installation insulation board 5, the installation board 5 is fixed on the box wall at the bottom of the box body, and the required high-voltage charging and discharging electrical components are fixed on the installation board 5 Devices and electrical components are connected through corresponding connecting lines. A low-voltage control device is fixed on the inner rear side of the box. Generally, the low-voltage control device (also called the control device) is a battery management system. In this embodiment, the control device includes two parts, namely the battery The main control unit 9 of the management system and the insulation monitoring unit 11 of the battery management system are fixed on the rear box wall, for example, by fastening screws. Certainly, as another embodiment, the control device may also be only the main control unit of the battery management system.

As shown in Figure 4, there are high and low voltage input and output aviation plugs (that is, sockets) distributed on the front side of the box for the input and output of power and communication. These aviation plugs are roughly divided into power aviation plugs and communication aviation plugs. These aviation plugs and the front side box wall constitute the front panel of the aviation plug. The power aviation plug is connected to the control equipment through the corresponding electrical components to realize the corresponding control; the communication aviation plug is connected to the control equipment to realize the information interaction with the external equipment.

In this embodiment, the electrical components installed by fastening screws on the electrical installation insulating board 5 include a Hall current sensor 6, a power supply negative relay 7, a pre-charging circuit resistor 8, a power supply positive relay 10, a pre-charging circuit relay 12, Charging circuit relay 13 , heating circuit relay 14 , heating circuit fuse 15 , charging circuit fuse 16 , air conditioning branch fuse 17 , defrosting branch fuse 19 and auxiliary branch fuse 20 .

The aviation plugs on the front panel include charging communication aviation plug 22, internal communication aviation plug 23, diagnostic communication aviation plug 24, external communication aviation plug 25, air conditioner aviation plug 26, auxiliary interface aviation plug 27, discharge positive aviation plug 28, maintenance switch 29. Positive air plug for power supply 30, positive air plug for charging 31, air plug for heating interface 32, negative air plug for charging 33, air plug for defrosting 34, negative air plug for discharge 35, and negative air plug 36 for power supply.

The power supply positive terminal 30 and the power supply negative terminal 36 are used to connect the battery system; the discharge positive terminal 28 and the discharge negative terminal 35 are respectively connected to the positive and negative ends of the power system of the vehicle, and are used to output electric energy to the power system of the vehicle. Drive the vehicle to provide power; the positive charging plug 31 and the negative charging plug 33 are used to connect to the charging line to charge the battery system; the communication plugs, such as the charging communication plug 22, the internal communication plug 23, the diagnostic communication plug Plug 24, external communication aviation plug 25, etc. are used to communicate with the outside world, receive data information from the outside world and send data information to the outside world; After reaching the air-conditioning aviation plug 26, the battery system can supply power for the air-conditioning equipment. Similarly, the heating interface aviation plug 32 and the defrosting aviation plug 34 are respectively used to connect an external heater and a defroster.

As shown in Figure 5, a power line is connected between the positive power supply aviation plug 30 and the power negative pole aviation plug 36, and the power line is composed of a main line connected in series with the contacts of the power supply negative relay 7 (K4 in the figure). The main line includes a power supply line, a pre-charging line and a charging line arranged in parallel, wherein the power supply line is formed by connecting the contacts of the positive pole relay 10 (K1 in the figure) in series with a power supply branch circuit, and the power supply branch circuit includes a parallel set Air-conditioning power supply branch, defrosting power supply branch and discharge branch, air-conditioning aviation plug 26 and air-conditioning branch fuse 17 (FU4 in the figure) are connected in series on the air-conditioning power supply branch, and defrosting aviation plugs are connected in series on the defrosting power supply branch 34 and the defrosting branch fuse 19 (FU3 in the figure), the discharge branch is provided with a discharge positive pole aviation plug 28 and a discharge negative pole aviation plug 35 in series; an auxiliary interface aviation plug 27, a precharge circuit resistance 8. The contacts of the pre-charging circuit relay 12 (K2 in the figure) and the auxiliary branch fuse 20 (FU2 in the figure); the contacts of the charging circuit relay 13 (K3 in the figure) are arranged in series on the charging line, The charging positive pole aviation plug 31, the charging negative pole aviation plug 33 and the charging circuit fuse 16 (FU5 in the figure). As shown in Figure 5, the power circuit also includes a heating circuit, on which a heating interface aviation plug 32, a heating circuit fuse 15 (FU6 in the figure) and a heating circuit relay 14 (K5 in the figure) are arranged in series. of contacts.

The main control unit of the battery management system controls and connects the power negative relay 7, the power positive relay 10, the pre-charging circuit relay 12, the charging circuit relay 13 and the heating circuit relay 14; the Hall current sensor is used to detect the current on the power line, and its set The position can be as shown in Fig. 3, the negative copper bar 21 passes through the central circular hole of the Hall sensor 6, one end of the negative copper bar 21 is installed on the negative pole aviation plug 36 of the power supply, and the Hall sensor 6 is fixed on the On the mounting plate 5; the main control unit of the battery management system is connected to the hall sensor 6 for sampling; the aviation plug for communication, such as the charging communication aviation plug 22, the internal communication aviation plug 23, the diagnosis communication aviation plug 24, the external communication aviation plug 25 and the battery management Corresponding connection to the communication port on the system main control unit.

In addition, the two ends of each fuse in the electrical components have insulating mounting supports 18, and the direct contact between the fuse and the mounting plate 5 is prevented through the corresponding insulating mounting supports to ensure insulation.

In order to ensure that the wiring inside the box is beautiful and tidy, and for easy maintenance, a wiring groove 4 is fixedly installed on the upper edge of the box 1, and the wiring groove is parallel to the bottom of the box, and is used for fixing the low-voltage wiring harness.

The bottom of the box body 1 is provided with pads at the four corners of the mounting plate 5, and the four corners of the mounting plate 5 are respectively fixed on the pads one by one, and the pads raise the installation position of the mounting plate 5. , so that there is a gap of a certain height between the bottom of the box body 1 and the bottom of the box body 1 , ensuring the insulation between the mounting plate 5 and the bottom of the box body 1 .

A layer of gasket 3 is pasted between the box body 1 and the box cover 2. In order to ensure the sealing effect, the thickness of the gasket is 5mm. The box cover 2 is fixed on the box body 1 by fastening screws. After fastening, the gasket 3 It is compressed and deformed to play a protective role and improve the protection level of the high-voltage control box; in addition, in order to ensure the sealing effect, the material of the gasket 3 is foamed EPDM with high compression and rebound rate.

Copper bars are used for power connection between the electrical components on the mounting plate 5, such as high-current power connections between the electrical components, and the copper bars are provided with mounting holes of required specifications, and the circuit connections are carried out through the mounting holes. To ensure good electrical conductivity, the collection of copper bars is copper T2.

Since the front side wall inside the box body 1 is provided with aviation plugs, and the rear side wall is provided with control equipment, so, in order to ensure the insulation between the mounting plate 5 and the other two side walls, that is, between the left and right side walls, the left and right Insulating resin plates are pasted on the two side walls, taking 1 mm thickness as an example, the resin plates can prevent the mounting plate 5 from being in direct contact with the left and right side walls, thereby avoiding affecting the insulation of the mounting plate 5 .

In the above-mentioned embodiments, the electrical components are arranged on an electrical installation insulation board, and the installation board is fixedly arranged on the box wall at the bottom of the box, which can ensure the insulation between the electrical components and the bottom of the box. As other embodiments , if good insulation can be ensured between the electrical components and the bottom wall of the box, the electrical components can also be directly fixed on the bottom wall of the box.

In the above-mentioned embodiments, the aviation plug (socket) and the control device are respectively installed on the opposite side walls. As other embodiments, the aviation plug (socket) and the control device can also be respectively installed on the adjacent side walls, or, The aviation plug (socket) can also be arranged on the bottom of the box body, the box cover or be installed on the same side wall as the control equipment.

In the above-mentioned embodiments, the specific types of aviation plugs (sockets) are given. Each type of aviation plug has its own function. Correspondingly, there are also devices corresponding to the aviation plug in the electrical components. However, the basic idea of the utility model Because of the structure of the above control box, the specific types and numbers of electrical components, the specific types and numbers of connecting lines and sockets can be set according to specific conditions, for example: when the vehicle does not need to be defrosted or heated, just There is no need to set the defrosting branch circuit and the heating branch circuit, correspondingly, there is no need to set the defrosting branch circuit fuse, defrosting socket, heating interface aviation plug, heating circuit fuse and heating circuit relay in the electrical components; or in If the vehicle does not need pre-charging detection, the pre-charging circuit may not be provided, and the electrical components and aviation plugs related to the pre-charging detection may also be correspondingly discarded. Or the circuit structure in the box adopts the control circuit disclosed in the patent application document with application number 201220139430.8. In a word, the specific circuit is not the invention point of the present utility model, and it can be specifically set according to specific situations. Changes, modifications, replacements and modifications to the embodiments without departing from the principle and spirit of the present utility model still fall within the protection scope of the present utility model.

Claims (9)

1. a battery system control cabinet, it including casing, and is arranged on low voltage control equipment and the high-voltage charge and discharge electric device of box house, it is characterised in that, described low voltage control equipment is fixed on a sidewall of casing, and described high-voltage charge and discharge electric device is arranged on the bottom of casing；

Being provided with power jack and communication socket on another sidewall of described casing, described power jack is connected by corresponding high-voltage charge and discharge electric device is corresponding with low voltage control equipment, and the communication corresponding with described low voltage control equipment of described communication socket connects.

2. battery system control cabinet according to claim 1, it is characterised in that described low voltage control equipment is fixed on the rear wall of described casing, described power jack and communication socket are arranged on the front side wall of described casing.

3. battery system control cabinet according to claim 1, it is characterised in that described high-voltage charge and discharge electric device is fixedly mounted on an installing plate, and described installing plate insulating mounting is in the bottom of described casing.

4. battery system control cabinet according to claim 3, it is characterised in that described casing upper edge edge is installed with the Wiring trough parallel with the bottom of casing.

5. battery system control cabinet according to claim 3, it is characterised in that being provided with cushion block at four corner locations of the corresponding described installing plate of described bottom half, four corner correspondences of installing plate are fixed on cushion block.

6. battery system control cabinet according to claim 1, it is characterised in that described casing is correspondingly arranged on a case lid, is pasted with one layer of sealing gasket between described case lid and casing.

7. battery system control cabinet according to claim 6, it is characterised in that the material of described sealing gasket is foaming EPDM.

8. battery system control cabinet according to claim 1, it is characterised in that use copper bar to enter action edge between described high-voltage charge and discharge electric device and connect.

null9. battery system control cabinet according to claim 3，It is characterized in that，Described high-voltage charge and discharge electric device includes Hall current sensor、Positive source relay、Power cathode relay and charge relay，Described power jack includes power positive cathode socket、Charging socket、Electric discharge socket、Defrosting socket and air-conditioning socket，It is connected with a power circuit being made up of the contact series of a main line and described power cathode relay between power positive cathode socket，Described main line includes supply line and the charging circuit being arranged in parallel，Described supply line is in series with a power supply branch road by the contact of described positive source relay，Described power supply branch road includes that the air-conditioning being arranged in parallel is powered branch road、Defrosting power supply branch road and discharge paths，Described air-conditioning string on branch road of powering sets described air-conditioning socket and air-conditioning branch road fuse，On described defrosting power supply branch road, string sets described defrosting socket and defrosting branch road fuse，In described discharge paths, string sets described electric discharge socket；On described charging circuit, string is provided with contact, charging socket and the charging circuit fuse of described charge relay；Described control equipment includes battery management system, and the control of described battery management system connects described positive source relay, power cathode relay and charge relay；Described Hall current sensor is for detecting the electric current on described power circuit, and the sampling of described battery management system connects described Hall current sensor；Described communication socket is connected with the PORT COM on battery management system；Described air-conditioning branch road fuse, defrosting branch road fuse, charging circuit fuse and Hall current sensor are all fixed on described installing plate by insulating mounting bearing.