CN214411410U

CN214411410U - Lightweight power battery system

Info

Publication number: CN214411410U
Application number: CN202120686385.7U
Authority: CN
Inventors: 陈燕; 徐建建; 张智; 刘成; 米迅; 伍治
Original assignee: Gotion High Tech Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-10-15
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses a lightweight power battery system, comprising a box body, a 3P4S module, a copper bar, a BDU, a BMS, a fuse, a shunt, a main positive and main negative connector, a slow charging connector and a low-voltage collecting connector , the box is provided with multiple 3P4S modules, and the box is also equipped with BDU, BMS, fuse, shunt, main positive and main negative connectors, slow charging connectors and low-voltage acquisition connectors. The copper bar connects the main positive, main and negative connectors, BDUs, fuses, and shunts in series into a loop, the slow charging connectors are electrically connected to the main positive, main and negative connectors, and the BMS and low-voltage collection connectors are both electrically connected The 3P4S module, BDU, fuse and shunt. The advantages of the utility model are that the internal structure of the battery system is closely arranged and reasonably arranged, the internal space of the box body is fully utilized, the space utilization rate of the box body is improved, the external dimension of the battery system is compressed to the maximum extent, and the energy of the battery is improved. density.

Description

Lightweight power battery system

Technical Field

The utility model relates to a power battery technical field specifically is a lightweight power battery system.

Background

With the increasing popularization of current electric vehicles, the power battery is used as a core component of the electric vehicle, the power battery is increasingly concerned by vehicle factories to improve energy density and mileage, and particularly, the requirements on the service life of the power battery pack and the light weight of the power battery pack are higher and higher when the power battery pack is used in various environments. With the development of the power battery technology, most power battery packs improve the energy density of a power battery system by improving the integration level of parts, namely, the space occupied by repeatedly connecting and fixing the parts in the power battery packs is reduced as much as possible, more available space is provided for the power battery packs, the volume energy density of the power battery packs is improved, and therefore the cruising mileage of the electric automobile is improved. However, the power battery in the market is large in size and heavy in weight, so that the energy density of the battery is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve lies in how to improve power battery's energy density.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a lightweight power battery system, includes box, 3P4S module, copper bar, BDU, BMS, fuse, shunt, the positive and negative connector of owner, fills connector and low pressure slowly and gathers the connector, be provided with a plurality of 3P4S modules in the box, the box is inside still to be equipped with BDU, BMS, fuse, shunt, the positive and negative connector of owner, fills connector and low pressure slowly and gathers the connector, the copper bar is with the positive and negative connector of owner, BDU, fuse, shunt series connection to become the return circuit, fill the connector electricity slowly and connect the positive and negative connector of owner, BMS and low pressure are gathered the equal electricity of connector and are connected 3P4S module, BDU, fuse and shunt.

This battery system uses small, the integrative BMS of principal and subordinate with low costs to replace BMS host computer and BMS from the machine, practices thrift and arranges the space, uses the shunt to replace the built-in hall sensor of BDU, reduces BDU weight and cost, and then has alleviateed this battery system's weight to this battery system inner structure arranges closely, and reasonable layout has fully utilized the box inner space, has improved the space utilization of box, furthest's compression battery system's overall dimension, promotes the energy density of battery.

Preferably, the BDU is fixed in the box body through a BDU fixing bracket.

Preferably, the BMS is fixed inside the case by a BMS fixing bracket.

Preferably, the bottom of the 3P4S module is also electrically connected with a heating film.

Preferably, the 3P4S module is further connected with a ground wire.

Preferably, the box includes box down, goes up case lid and sealing washer, BDU, BMS, fuse, shunt, main positive and negative connector, fill connector and low pressure collection connector setting in the box down, box and last case lid junction pad are equipped with the sealing washer down.

Preferably, the lower box body comprises a shell, a frame beam and lifting lugs, the edge of the shell is provided with a flanging extending outwards, the sealing ring pad is arranged on the flanging, the frame beam is fixed inside the shell, the BDU, the BMS, the fuse and the shunt are fixed on the frame beam, and each outer side face of the shell is at least provided with one lifting lug.

Preferably, the frame roof beam all is equipped with at the inside both ends of casing, the frame roof beam includes horizontal installation roof beam and vertical installation roof beam, connects through two vertical installation roof beams between two horizontal installation roof beams and forms an organic whole structure and fix inside the casing.

Preferably, the bottom of each of the horizontal mounting beam and the vertical mounting beam is also provided with a reinforcing beam.

Preferably, a plurality of parallel reinforcing plates are further fixed between the vertical mounting beams.

Compared with the prior art, the beneficial effects of the utility model are that:

Drawings

Fig. 1 is an exploded schematic view of an embodiment of the utility model;

FIG. 2 is a schematic structural view of a lower cover plate according to an embodiment of the present invention;

fig. 3 is a top view of a lower cover plate according to an embodiment of the present invention.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention by those skilled in the art, the technical solutions of the present invention will now be further described with reference to the drawings attached to the specification.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless explicitly stated or limited otherwise, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, the embodiment discloses a light-weight power battery system, which includes a box 1, a 3P4S module 2, a copper bar 3, a BDU4, a BMS5, a fuse 6, a shunt 7, a main positive main negative connector 8, a slow charging connector 9 and a low voltage collecting connector 10, wherein the box 1 is internally provided with a plurality of 3P4S modules 2, the box 1 is also internally provided with a BDU4, a BMS5, a fuse 6, a shunt 7, a main positive main negative connector 8, a slow charging connector 9 and a low voltage collecting connector 10, the copper bar 3 connects the main positive main negative connector 8, the BDU4, the fuse 6 and the shunt 7 in series to form a loop, the slow charging connector 9 is electrically connected with the main positive main negative connector 8, the BMS5 and the low voltage collecting connector 10 are electrically connected with the 3P4S module 2, the BDU4, the fuse 6 and the low voltage collecting connector 10, thereby realizing the discharging and charging functions and the charging and discharging temperature of the battery system, And collecting and transmitting information such as voltage, current and the like.

This battery system uses small, the integrative BMS of principal and subordinate that is with low costs to replace BMS host computer and BMS from the machine, practices thrift and arranges the space, uses shunt 7 to replace the built-in hall sensor of BDU4, reduces BDU4 weight and cost, and then has lightened this battery system's weight, and this battery system inner structure arranges closely, and reasonable layout has make full use of 1 inner space of box, has improved the space utilization of box 1, furthest's compression battery system's overall dimension, promotes the energy density of battery.

The box body 1 comprises a lower box body 101, an upper box cover 102 and a sealing ring 103, the BDU4, the BMS5, the fuse 6, the shunt 7, the main positive and negative connectors 8, the slow charging connector 9 and the low-voltage collecting connector 10 are arranged in the lower box body 101, and the sealing ring 103 is padded at the joint of the lower box body 101 and the upper box cover 102.

The lower box body 101 comprises a shell 1011, a frame beam 1012 and lifting lugs 1013, the edge of the shell 1011 is provided with a flanging 10111 extending outwards, the sealing ring 103 is padded on the flanging 10111, the frame beam 1012 is fixed inside the shell 1011, the BDU4, the BMS5, the fuse 6 and the shunt 7 are fixed on the frame beam 1012, and each outer side surface of the shell 1011 is at least provided with one lifting lug 1013. In this embodiment, the inside both ends of casing 1011 all are equipped with frame roof beam 1012, 3P4S module 2 is 7, and wherein four 3P4S module 2 are fixed on the frame roof beam 1012 of casing 1011 one end, and three 3P4S module 2 and BDU4, BMS5 and fuse 6 are fixed on the frame roof beam 1012 of the other end of casing 1011 for this battery system inner structure arranges closely, and rational layout has fully utilized box 1 inner space, has improved box 1's space utilization, furthest's compression battery system's overall dimension, the energy density of promotion battery.

Further, the frame beams 1012 comprise horizontal mounting beams 10121, vertical mounting beams 10122 and reinforcing plates 10123, the two horizontal mounting beams 10121 are connected through the two vertical mounting beams 10122 to form an integral closed ring structure and are welded and fixed inside the shell 1011, and a plurality of parallel reinforcing plates 10123 are further fixed between the vertical mounting beams 10122 and are used for fixing the 3P4S module 2 and reinforcing the strength and rigidity of the lower box 101.

Still further, the bottom of each of the horizontal installation beam 10121 and the vertical installation beam 10122 is further provided with a reinforcing beam (not shown).

The BDU4 is fixed to the frame beam 1012 by the BDU fixing bracket 11, and the BMS5 is fixed to the frame beam 1012 by the BMS fixing bracket 12.

3P4S module 2 bottom still electricity is connected with heating film 13, and is concrete, heating film 13 adopts comb form effective heating area through hot emulation calculation, and cell bottom 1/2 department arranges the heater strip promptly, and all the other positions are the bearing bubble cotton, link to each other with high-voltage circuit through the heater strip, and the low temperature state is the cell heating, guarantees the charge and discharge performance of cell, effectively reduces battery cost and weight.

The 3P4S module 2 is further connected with a ground line 14.

The utility model discloses an assembly process as follows: firstly fixing a heating film 1 on a frame beam 1012, then fixing four 3P4S modules 2 on the frame beam 1012 at one end of a shell 1011, then fixing the other three 3P4S modules 2, a BDU4, a BMS5 and a fuse 6 on the frame beam 1012 at the other end of the shell 1011, connecting a main positive and negative connector 8, a BDU4, a fuse 6 and a shunt 7 in series to form a loop through a copper bar 3, electrically connecting a slow charging connector 9 with the main positive and negative connector 8, and electrically connecting the BMS5 and a low-voltage collecting connector 10 with the 3P4S modules 2, the BDU4, the fuse 6 and the shunt 7 to realize the discharging and fast charging functions of the battery system and the collection and transmission of temperature, voltage, current and other information in the charging and discharging processes, and finally covering the upper box cover 102 to finish the installation of the battery system.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The above embodiments only show the embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention.

Claims

1. A lightweight power battery system, characterized in that: comprising a box, a 3P4S module, a copper busbar, a BDU, a BMS, a fuse, a shunt, a main positive, main and negative connector, a slow charging connector and a low-voltage acquisition connector. There are multiple 3P4S modules in the box, and BDU, BMS, fuses, shunts, main positive, main and negative connectors, slow charging connectors and low-voltage acquisition connectors are also installed in the box. The copper bar connects the main positive, main and negative connectors, BDUs, fuses, and shunts in series into a loop, the slow charging connectors are electrically connected to the main positive, main and negative connectors, and the BMS and the low-voltage collection connectors are both electrically connected. Connect the 3P4S module, BDU, fuse and shunt.

2 . The lightweight power battery system according to claim 1 , wherein the BDU is fixed inside the box through a BDU fixing bracket. 3 .

3 . The lightweight power battery system according to claim 1 , wherein the BMS is fixed inside the box through a BMS fixing bracket. 4 .

4 . The lightweight power battery system according to claim 1 , wherein a heating film is also electrically connected to the bottom of the 3P4S module. 5 .

5 . The lightweight power battery system according to claim 1 , wherein the 3P4S module is further connected with a ground wire. 6 .

6. A lightweight power battery system according to claim 1, wherein the box body comprises a lower box body, an upper box cover and a sealing ring, the BDU, BMS, fuse, shunt, main The positive main and negative connectors, the slow charging connector and the low-voltage collecting connector are arranged in the lower box body, and the joint between the lower box body and the upper box cover is cushioned with a sealing ring.

7 . The light-weight power battery system according to claim 6 , wherein the lower box comprises a casing, a frame beam and a lifting lug, and an edge of the casing is provided with an outwardly extending flap. 8 . side, the sealing ring gasket is arranged on the flange, the frame beam is fixed inside the casing, the BDU, BMS, fuse, and shunt are fixed on the frame beam, and each outer side of the casing is at least Features a lifting lug.

8 . The lightweight power battery system according to claim 7 , wherein both ends of the casing are provided with frame beams, and the frame beams include a horizontal mounting beam and a vertical mounting beam, two of which are 8. 9 . The horizontal mounting beams are connected by two vertical mounting beams to form an integrated structure and are fixed inside the shell.

9 . The lightweight power battery system according to claim 8 , wherein the bottoms of the horizontal mounting beam and the vertical mounting beam are further provided with reinforcing beams. 10 .

10 . The lightweight power battery system according to claim 8 , wherein a plurality of parallel reinforcing plates are also fixed between the vertical installation beams. 11 .