CN210116404U

CN210116404U - Battery pack isolation unit and distribution box

Info

Publication number: CN210116404U
Application number: CN201920532700.3U
Authority: CN
Inventors: 陈昌; 赵恒�; 杨毅
Original assignee: Shenzhen Sheng Si Da Technology Co Ltd
Current assignee: Shenzhen Sheng Si Da Technology Co Ltd
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2020-02-28
Anticipated expiration: 2029-04-18

Abstract

The utility model discloses a battery package isolation unit and block terminal relates to the battery field, include: fuse, major loop, pre-charge return circuit and control module, the fuse input is connected with the output of battery, the output of fuse with the input of major loop is connected, the input of load is connected to the output of major loop, the input in pre-charge return circuit is connected the output of fuse, the output in pre-charge return circuit is connected the input of load, control module control the major loop with switching on in pre-charge return circuit. The utility model discloses earlier carry out the precharge to the load through the return circuit that precharges, rethread major loop charges to the load, uses through the major loop and the cooperation of precharge return circuit, overcomes to have the technical problem that battery package circuit unit life is short among the prior art, has realized a life-span height, the fast battery package isolation unit of response.

Description

Battery pack isolation unit and distribution box

Technical Field

The utility model belongs to the technical field of the battery and specifically relates to a battery package isolation unit and associated equipment.

Background

Compared with the traditional automobile, an important characteristic of the electric automobile is that a high-voltage system capable of ensuring enough power performance, such as a charging system, a distribution box, an energy storage system (power battery), a power system (driving motor) and the like, is arranged in the automobile, and the voltage of the high-voltage system is higher than 300V, and the current of tens of amperes or even hundreds of amperes can be used for testing the use safety of the vehicle-mounted high-voltage electric appliance at any time.

Currently, a Battery management system mainly controls high-voltage output of a Battery through a Battery pack isolation Unit (Battery Disconnect Unit), and the problem that the service life of the Battery pack isolation Unit is too short exists.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model discloses an aim at provides a battery package isolation unit that life-span is high, response speed is fast.

Therefore, the second objective of the present invention is to provide a distribution box with a long service life and a fast response speed.

The utility model adopts the technical proposal that:

in a first aspect, the present invention provides a battery pack isolation unit, comprising: fuse, major loop, pre-charge return circuit and control module, the fuse input is connected with the output of battery, the output of fuse with the input of major loop is connected, the input of load is connected to the output of major loop, the input in pre-charge return circuit is connected the output of fuse, the output in pre-charge return circuit is connected the input of load, control module control the major loop with switching on in pre-charge return circuit.

Further, the pre-charge loop includes: the device comprises a first relay and a pre-charging resistor, wherein one end of the pre-charging resistor is an input end of the pre-charging loop, the other end of the pre-charging resistor is connected with one end of the first relay, and the other end of the first relay is an output end of the pre-charging loop.

Further, the main circuit includes: the positive relay is connected between the positive pole of the battery and the load, and the negative relay is connected between the negative pole of the battery and the load.

Furthermore, the battery control system also comprises a Hall sensor, wherein the Hall sensor is sleeved on a positive bus and a negative bus of the battery, and the output end of the Hall sensor is connected with the input end of the control module.

Further, still include the voltage measurement module, the voltage measurement module measurement includes: battery voltage, load voltage, voltage between the first relay and the load across.

Furthermore, the control module comprises a single chip microcomputer, the input end of the single chip microcomputer is respectively connected with the output end of the Hall sensor and the output end of the voltage measurement module, and the output end of the single chip microcomputer is connected with the input end of the main loop and the input end of the pre-charging loop.

In a second aspect, the invention provides a power distribution box comprising the battery pack isolation unit.

The utility model has the advantages that:

the utility model discloses a set up the major loop and precharge the return circuit, precharge the load through precharging the return circuit earlier, after load voltage rose to the default, rethread major loop charges to the load, uses through the major loop and precharge return circuit cooperation, overcomes to have among the prior art that battery package circuit unit only charges through a charging circuit, and the technical problem that life is short has realized a battery package isolation unit that life-span is high, response speed is fast.

Drawings

Fig. 1 is a block diagram of a battery pack isolation unit according to an embodiment of the present invention;

fig. 2 is a circuit diagram of an embodiment of a battery pack isolation unit according to the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

As shown in fig. 1, fig. 1 is a block diagram of a specific embodiment of a battery pack isolation unit of the present invention, which includes: fuse, major loop, pre-charge return circuit and control module (not shown in the figure), the fuse input is connected with the output of battery, the output of fuse with the input of major loop is connected, the input of load is connected to the output of major loop, the input in pre-charge return circuit is connected the output of fuse, the output in pre-charge return circuit is connected the input of load, control module (not shown in the figure) control the major loop with switching on in pre-charge return circuit.

Initially, the battery is connected with the load through the pre-charging loop, relevant parameters are detected, for example, when the voltage at two ends of the load is detected to be increased to a preset value, an instruction is sent to the control module, the pre-charging loop is disconnected through the control module, the main loop is connected through the control module, voltage is provided for the load, and the service life of the main loop can be effectively prolonged through the cooperation of the pre-charging loop and the main loop.

Specifically, as shown in fig. 2, fig. 2 is a circuit diagram of an embodiment of the battery pack isolation unit of the present invention, the battery is BT1, BT2, and the pre-charging circuit includes: the device comprises a first RELAY RELAY-1 and a pre-charging RESISTOR RESISTOR, wherein one end of the first RELAY RELAY-1 is an input end of the pre-charging loop, the other end of the first RELAY RELAY-2 is connected with one end of the pre-charging RESISTOR RESISTOR, and the other end of the pre-charging RESISTOR RESISTOR is an output end of the pre-charging loop.

The main circuit includes: the RELAY comprises a positive RELAY RELAY-2 and a negative RELAY RELAY-3, wherein the positive RELAY RELAY-2 is connected between the positive pole of the battery and the load, the negative RELAY RELAY-3 is connected between the negative pole of the battery and the load, and the CONTROL module CONTROL CONTROLs the on and off of the RELAYs through switches K1-K3.

The intelligent power supply system further comprises a HALL SENSOR, the HALL SENSOR is sleeved on a positive bus and a negative bus of the battery, an output end of the HALL SENSOR is connected with an input end of the control module, when the system has an electric leakage fault, the algebraic sum of currents of the positive bus and the negative bus is not 0, the HALL SENSOR outputs a current signal, in the embodiment, when the HALL SENSOR is set to detect that the algebraic sum of the current signals output by the positive bus and the negative bus is greater than 25mA, the HALL SENSOR sends a signal to the control module, and the control module timely disconnects the main loop and the pre-charging loop and sends fault information to a Vehicle Control Unit (VCU).

In this embodiment, the apparatus further includes a voltage measurement module (not shown in the figure), and the voltage measurement module measures the voltage including: when the pre-charging loop is conducted, whether pre-charging is completed or not is judged by measuring the voltage of the load and the voltage of the battery, the voltages at two ends of the pre-charging resistor are gradually reduced along with gradual boosting of the load, when the voltage of the pre-charging resistor is smaller than a preset value of the voltage of the battery, 5% of the voltage of the battery is taken by the embodiment, pre-charging is judged to be completed, the pre-charging loop is controlled to be disconnected, the main contactor is conducted, and in order to guarantee normal external power supply, the closing time of the pre-charging loop and the closing time of the main loop can overlap for preset time, such.

The voltage detection point is arranged at the main contact point of the relay, and the wire end of the detection wire is fixed on the main contact point seat through a bolt.

In this embodiment, the fuse adopts the fast fusing characteristic EV-PACK customization product of intelligent control, and the installation is dismantled more conveniently, and this product has the low power and transships and tolerates longe-lived, and high multiplying power overcurrent or short circuit current cut off fault current are fast characteristic.

In order to reduce electromagnetic interference and improve the overall reliability, the high-voltage side and low-voltage measurement signal wiring and the charging and discharging power module wiring adopt independent modes, and a modular design is adopted, so that the rapid replacement is facilitated.

The utility model also discloses a block terminal, include a battery package isolation unit.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. A battery pack isolation unit, comprising: fuse, major loop, pre-charge return circuit and control module, the fuse input is connected with the output of battery, the output of fuse with the input of major loop is connected, the input of load is connected to the output of major loop, the input in pre-charge return circuit is connected the output of fuse, the output in pre-charge return circuit is connected the input of load, control module control the major loop with switching on in pre-charge return circuit.

2. The battery pack isolation unit of claim 1, wherein the pre-charge loop comprises: the circuit comprises a first relay and a pre-charging resistor, wherein one end of the first relay is the input end of the pre-charging loop, the other end of the first relay is connected with one end of the pre-charging resistor, and the other end of the pre-charging resistor is the output end of the pre-charging loop.

3. The battery pack isolation unit of claim 1, wherein the primary circuit comprises: the positive relay is connected between the positive pole of the battery and the load, and the negative relay is connected between the negative pole of the battery and the load.

4. The battery pack isolation unit of claim 1, further comprising a hall sensor, wherein the hall sensor is sleeved on the positive bus and the negative bus of the battery, and the output end of the hall sensor is connected with the input end of the control module.

5. The battery pack isolation unit of claim 4, further comprising a voltage measurement module, wherein the voltage measurement module measures the voltage of the battery pack isolation unit, and comprises: battery voltage, load voltage, and pre-charge resistance voltage.

6. The battery pack isolation unit of claim 5, wherein the control module comprises a single chip microcomputer, an input end of the single chip microcomputer is connected with an output end of the Hall sensor and an output end of the voltage measurement module, and an output end of the single chip microcomputer is connected with an input end of the main loop and an input end of the pre-charging loop.

7. A distribution box comprising a battery pack isolation unit as claimed in any one of claims 1 to 6.