WO2018032408A1

WO2018032408A1 - Power battery box having battery management system

Info

Publication number: WO2018032408A1
Application number: PCT/CN2016/095667
Authority: WO
Inventors: 张志国; 曹桂兴
Original assignee: 深圳市科列技术股份有限公司
Priority date: 2016-08-17
Filing date: 2016-08-17
Publication date: 2018-02-22

Abstract

A power battery box having a battery management system, comprising a box body for installing a power battery pack, and a battery management system connecting with the power battery pack by means of a signal collection cable; the box body is formed with a connector mounting hole, a connector is mounted on the connector mounting hole, the signal collection cable is connected to the connector, and the connector is configured on an external side surface of the box body to form a socket; the battery management system comprises a circuit board, the circuit board is provided with a plug that can be correspondingly and insertedly connected to the socket, and the circuit board is connected with the signal collection cable by means of the plug and the socket. The power battery box has the advantages of: good water resistance, dust resistance and sealing performances, convenient debugging, examination and repair, and safe and reliable maintenance.

Description

Power battery box with battery management system

Technical field

The present invention relates to a power battery for an electric vehicle, and more particularly to a power battery box with a battery management system.

Background technique

At present, the battery management system (BMS) of the electric vehicle power battery is basically built in the battery pack (PACK), and most of the battery packs are required to be waterproof and dustproof to IP67. If it is necessary to detect, repair or need to repair and replace the battery management system during the maintenance of the vehicle, it is necessary to disassemble and repair the power battery pack, which is time consuming and laborious, and it is easy to power if it is not properly operated. The battery pack has a reduced dustproof and waterproof rating.

Summary of the invention

The main object of the present invention is to overcome the deficiencies of the prior art and provide a power battery box with a battery management system, which is convenient for maintenance and improves the dustproof and waterproof performance of the box.

To achieve the above object, the present invention adopts the following technical solutions:

A power battery box with a battery management system, comprising a box for installing a power battery pack and a battery management system connected to the power battery pack through a signal collecting line, wherein the box body is provided with a connector mounting hole, a connector is mounted on the connector mounting hole, the signal acquisition line is connected to the connector, the connector is configured to form a socket on an outer side of the box, and the battery management system comprises a circuit board. The circuit board is provided with a plug that can be correspondingly plugged into the socket, and the circuit board connects the signal collection line through the plug and the socket.

further:

The plug is configured to pass from the circuit board toward one side of the socket and form a plurality of measurement contacts on the other side of the circuit board.

The plurality of measurement contacts are configured to form a plurality of pins that protrude from a surface of the circuit board.

The pins are 1-10 mm above the surface of the circuit board, preferably 4-6 mm.

A cover plate is also included, the cover plate being detachably mounted on the outer casing side of the power battery pack and covering the circuit board.

A maintenance window that can be opened or closed is opened on the cover plate corresponding to the position of the plug.

The maintenance window is provided with a screw cap that is screwed.

A recessed portion is formed on a side of the outer surface of the box, and at least a portion of the battery management system is embedded in the recessed portion.

Forming a groove for arranging the circuit board on the recessed portion, a periphery of the groove is provided with a sealing ring, a cover plate covering the circuit board is covered on the groove, and the sealing ring is Pressing to achieve a waterproof seal between the cover and the case.

The circuit board is fixed to the cover by screws, and the cover is fixed to the case by screws.

The beneficial effects of the invention:

The invention arranges a battery management system (BMS) on the outer side surface of the power battery package body, and connects the external BMS to the signal collection line of the power battery package in the box through a connector disposed on the box body, Therefore, the external BMS can detect the voltage, current, temperature and the like inside the battery pack through the connector. By adopting the invention, when the battery in the battery pack needs to be detected and repaired during the maintenance of the vehicle, or when the battery management system needs to be disassembled for inspection and replacement, the power battery package body does not need to be disassembled for inspection and maintenance. Or replacement (including balanced maintenance of the cell unit, no need to open the battery case when the BMS module needs to be upgraded or replaced), not only easy to maintain, but also fundamentally avoid the power battery caused by improper operation The bag is contaminated by water or dust because the case is opened. Therefore, compared with the prior art, the solution of the invention has the advantages of waterproof and dustproof sealing, convenient debugging and maintenance, and safe and reliable maintenance.

The preferred technical solution can also obtain more advantages. For example, in a preferred solution, the plug for connecting the connector on the circuit board of the BMS is configured on the other side of the circuit board of the BMS (ie, the side facing outward) to form a plurality of measurement contacts, each measuring touch The points can be set to correspond to the respective signal acquisition lines, so that it is convenient to test the battery voltage, temperature and other signals through these measurement contacts to realize detection and maintenance. In another preferred solution, a cover plate is further disposed on the outer side of the box to cover and protect the circuit board of the BMS located on the outer side of the box, and the cover is opened or closed corresponding to the position of the plug. The window can be more easily detected and maintained through the maintenance window.

DRAWINGS

1 is a schematic structural view of a connector inside a power battery box case according to an embodiment of the present invention;

2 is a schematic view showing the structure of a connector on the outer side of a power battery box case according to an embodiment of the present invention; Figure

3 is a cross-sectional view showing an assembled structure of a power battery box case and a battery management system according to an embodiment of the present invention;

4 is a schematic view showing the installation of a battery management system of a power battery box according to an embodiment of the present invention (when the cover is not covered);

5 is a schematic view showing the installation of a battery management system of a power battery box according to an embodiment of the present invention (when the cover is closed);

6 is an exploded perspective view of a power battery box case and a battery management system according to an embodiment of the present invention.

detailed description

Embodiments of the invention are described in detail below. It is to be understood that the following description is only illustrative, and is not intended to limit the scope of the invention.

Referring to FIGS. 1 through 6, in one embodiment, a power battery compartment (PACK) with a battery management system (BMS) includes a cabinet 1 (only partially shown) for mounting a power battery pack and The power battery pack (not shown) is connected to the battery management system connected to the signal collecting line 2, and the box body 1 is provided with a connector mounting hole, and the connector mounting hole is mounted with a connector 3, the signal The collecting line 2 is connected to the connector 3 on the inner side of the casing 1. The connector 3 is disposed on the outer side of the casing 1 to form a socket 4, and the battery management system includes a circuit board 5, the circuit The board 5 is provided with a plug 6 that can be correspondingly plugged into the socket 4, and the circuit board 5 is connected to the signal acquisition line 2 via the plug 6 and the socket 4.

In a preferred embodiment, the plug 6 is configured to pass from the circuit board 5 towards one side of the socket 4 and form a plurality of measurement contacts on the other side of the circuit board 5.

In a more preferred embodiment, the plurality of measurement contacts are configured to form a plurality of pins 7 that protrude from the surface of the circuit board 5.

In a preferred embodiment, the pin 7 is 1-10 mm above the surface of the circuit board 5. Preferably, the pin 7 is 4-6 mm higher than the surface of the circuit board 5, more preferably 5 mm. about.

In a preferred embodiment, the power battery box further includes a cover plate 8 that is detachably mounted on the outer side of the casing 1 of the power battery pack and covers the circuit board 5.

In a more preferred embodiment, a maintenance window 9 that can be opened or closed is provided on the cover 8 corresponding to the position of the plug 6. Preferably, the maintenance window 9 is provided with a screw cap 10 that is threaded.

In a preferred embodiment, the outer side of the casing 1 is formed with a recessed portion, and at least a portion of the battery management system is embedded in the recessed portion. The outer side is designed to be recessed, so that the entire battery management system can be embedded in a part, which can avoid or to some extent reduce the possibility of being directly impacted, and is beneficial to protect the battery management system.

In a more preferred embodiment, a recess for arranging the circuit board 5 is formed on the recessed portion, and a seal ring 12 is disposed on the periphery of the recess, and the cover 8 covering the circuit board 5 is covered. The groove is pressed and the sealing ring 12 is pressed to achieve a waterproof seal between the cover 8 and the case 1.

In some embodiments, the circuit board 5 is fixed to the cover plate 8 by screws, and the cover plate 8 is fixed to the case 1 by screws.

In some embodiments, the battery management system is disposed on the outer side of the cabinet 1 of the power battery pack, and the signal acquisition line 2 inside the battery box is led to the outside of the cabinet 1 through a connector 3, and the external BMS The plug 6 on the circuit board 5 is directly inserted into the socket 4 of the connector 3 on the outer side of the casing 1. The external BMS passes through the plug 6 and the socket 4 to detect voltage, temperature, current and the like inside the battery pack. The outside of the circuit board 5 of the BMS can be covered by the cover 8 and the cover 8 can be removed for access. In addition, a maintenance window 9 can be arranged on the cover 8 of the BMS, and the battery voltage, temperature and the like can be more conveniently tested by the maintenance window 9 which is easier to open. According to the embodiment of the present invention, the cell unit can be directly balanced and maintained outside the box 1 , and the box 1 of the battery pack does not need to be opened when the BMS module needs to be upgraded or replaced, so that the waterproof sealing is good. It is convenient to debug and repair, safe and reliable to maintain.

In some embodiments, the outer side is designed to be recessed to enable the entire battery management system to be partially embedded to better protect the battery management system. A recess may also be formed on the recessed surface, the circuit board 5 of the BMS is mounted in the recess, the periphery of the recess is fitted with a sealing ring 12, and the cover plate 8 is mounted in the recess by the screw 14, covering the circuit board 5 while The sealing ring 12 is compressed, so that the sealing ring 12 acts as a waterproof seal between the cover plate 8 and the casing 1. The structure of the socket 4 is similar to an aviation socket. The plug 6 can be soldered directly to the circuit board 5. The pin 7 on the outer side of the plug 6 is about 5 mm higher than the solder joint of the circuit board 5, and the data information of each pin is directly measured during the inspection. During installation, the circuit board 5 of the BMS is first fixed to the cover 8 by means of screws 13, and after the plugs 6 on the circuit board 5 are aligned into the socket 4, the cover 8 is fastened to the case by screws 14. In order to prevent the cover 8 from being frequently disassembled on the casing 1 of the battery pack, a maintenance window 9 for debugging and repairing is opened on the cover 8 and sealed by the screw cap 10 and the sealing ring 11 on the screw cap 10 Threaded, matched with the thread on the maintenance window 9, for waterproofing. When inspecting, the inspection tool can be directly measured through the maintenance window 9. The signal and data of each pin 7 on the plug 6 are measured, and it can be judged whether the battery pack works normally.

The above is a further detailed description of the present invention in combination with specific/preferred embodiments, and it is not intended that the specific embodiments of the invention are limited to the description. It will be apparent to those skilled in the art that the present invention may be substituted or modified without departing from the spirit and scope of the invention. It belongs to the scope of protection of the present invention.

Claims

A power battery box with a battery management system, comprising a box for installing a power battery pack and a battery management system connected to the power battery pack through a signal acquisition line, wherein the box is provided with a connection a mounting hole, a connector is mounted on the connector mounting hole, the signal acquisition line is connected to the connector, and the connector is configured to form a socket on an outer side of the case, and the battery management system includes a circuit board, the circuit board is provided with a plug that can be correspondingly plugged into the socket, and the circuit board connects the signal collection line through the plug and the socket.
A power battery box according to claim 1, wherein said plug is configured to pass through from said circuit board toward one side of said socket and form a plurality of measuring contacts on the other side of said circuit board.
The power battery box of claim 2 wherein said plurality of measurement contacts are configured to form a plurality of pins that protrude from a surface of said circuit board.
A power battery box according to claim 3, wherein said pins are 1-10 mm higher than the surface of said circuit board, preferably 4-6 mm.
The power battery case according to any one of claims 1 to 4, further comprising a cover plate detachably mounted on the outer casing side of the power battery pack and covering the outer casing Said circuit board.
The power battery box according to claim 5, wherein a maintenance window that can be opened or closed is provided on the cover plate corresponding to the position of the plug.
A power battery box according to claim 6, wherein said maintenance window is provided with a screw cap mounted in a threaded manner.
The power battery case according to any one of claims 1 to 4, wherein a recessed portion is formed on an outer side surface of the case, and at least a part of the battery management system is embedded in the recessed portion.
The power battery box according to claim 8, wherein a recess for arranging the circuit board is formed on the recessed portion, and a seal ring is disposed on a periphery of the recess to cover the cover of the circuit board. Covering the groove and pressing the sealing ring to achieve a waterproof seal between the cover and the case.
A power battery box according to claim 5, wherein said circuit board is fixed to said cover by screws, and said cover is fixed to said case by screws.