CN211125724U

CN211125724U - Novel lithium battery pack module

Info

Publication number: CN211125724U
Application number: CN201921963246.3U
Authority: CN
Inventors: 蒋金国
Original assignee: Suzhou New Power Energy Co ltd
Current assignee: Suzhou New Power Energy Co ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-07-28
Anticipated expiration: 2029-11-14

Abstract

The utility model discloses a novel lithium battery pack module, which comprises a box body; the box body comprises a shell and an end cover arranged at the top of the shell; a lithium battery pack, a bracket and a power management system BMS are sequentially arranged in the box body from bottom to top; the lithium battery pack comprises a plurality of single lithium batteries; a pole column is arranged on the positive pole and the negative pole of each single lithium battery; a plurality of lower jacks corresponding to the pole posts in position are arranged on the bracket; the power management system BMS is provided with a plurality of upper jacks corresponding to the lower jacks; each pole post sequentially penetrates through the corresponding lower jack and the corresponding upper jack and is electrically connected with the power management system BMS; the power management system BMS is also provided with a charging and discharging wire harness extending out of the interior of the box body, and the extending part of the charging and discharging wire harness is provided with a fuse and a plug. The lithium battery pack module designed in the way is easy to assemble, more durable and longer in service life.

Description

Novel lithium battery pack module

Technical Field

The utility model relates to a lithium cell group field, in particular to novel lithium cell group module.

Background

The lithium battery pack is mainly used for supplying power to electric equipment such as electric automobiles and electric bicycles.

In the lithium battery pack in the prior art, a plurality of single lithium batteries are arranged and combined in a multi-series and multi-parallel mode according to a certain design mode; the anode and the cathode of the battery are welded and communicated by adopting a resistance spot welding mode for the metal sheet. The combined lithium battery pack is controlled to be charged or discharged by a power management system BMS. Sampling lines led out by the BMS are respectively communicated with the positive metal sheet of each single lithium battery by a soldering method so as to monitor the upper limit voltage and the lower limit voltage of the single lithium batteries, thereby achieving the purpose of protecting the lithium batteries.

It has the following disadvantages: firstly, the structure is complex, the assembly is not easy, meanwhile, more spots needing spot welding or tin soldering are needed, the fault is easy to occur, and the workload is large; secondly, the sealing performance is not high; thirdly, the earthquake-resistant performance is common.

These disadvantages all lead to a low durability and a low service life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lithium battery pack module that is difficult for breaking down, more durable, life is longer.

The purpose of the utility model is realized like this: a novel lithium battery pack module comprises a box body; the box body comprises a shell and an end cover arranged at the top of the shell; a lithium battery pack, a bracket and a power management system BMS are sequentially arranged in the box body from bottom to top; the lithium battery pack comprises a plurality of single lithium batteries; a pole column is arranged on the positive pole and the negative pole of each single lithium battery; a plurality of lower jacks corresponding to the pole posts in position are arranged on the bracket; the power management system BMS is provided with a plurality of upper jacks corresponding to the lower jacks; each pole post sequentially penetrates through the corresponding lower jack and the corresponding upper jack and is electrically connected with the power management system BMS; the power management system BMS is also provided with a charging and discharging wire harness extending out of the interior of the box body, and the extending part of the charging and discharging wire harness is provided with a fuse and a plug.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a lithium battery pack module has abandoned sampling line and metal connecting piece to through structural design adjustment, make the positive negative pole of monomer lithium cell directly adopt the mode of soldering to communicate with power management system BMS through utmost point post, the structure is simpler, easy equipment, it is more firm to connect, and reduced the place that needs spot welding or soldering, thereby become more durable, reduced the fault rate simultaneously, lengthened life; in addition, the anti-vibration performance and the sealing performance are strengthened, so that the service life of the lithium battery pack module is further prolonged.

Furthermore, the pole is L-shaped, and the pole is connected with the power management system BMS in a soldering mode.

Furthermore, a plurality of separation ribs for separating and positioning a plurality of single lithium batteries are arranged on the inner sides of the front panel and the rear panel of the shell; the lower end face of the support is provided with a plurality of separating sheets for separating and positioning the plurality of single lithium batteries. The design makes the lithium cell group fixed more firm, and the antidetonation effect is better, still does benefit to the lithium cell group heat dissipation simultaneously.

Furthermore, a plurality of buckles are arranged on the inner side of the upper port of the shell; and a plurality of clamping grooves matched with the buckles are formed in the periphery of the support. The design makes the lithium cell group fixed more firm, and the antidetonation effect is better, is difficult for breaking down to prolong this module life.

Furthermore, the shell and the end cover are made of plastics; the shell and the end cover are welded and sealed in an ultrasonic welding mode. The design is good in sealing effect, and water or impurities are not easy to permeate, so that the service life of the module is prolonged.

Furthermore, an upper wire passing groove is arranged on the end cover, and a lower wire passing groove corresponding to the upper wire passing groove is arranged on the shell; the charging and discharging wire harness penetrates through the upper wire passing groove and the lower wire passing groove to extend out of the box body, and a wire harness rubber sleeve is arranged at the matching position of the charging and discharging wire harness and the upper wire passing groove and the lower wire passing groove. The design has strengthened the protection to the charge-discharge pencil like this, has still improved the leakproofness of box simultaneously to the life of extension this module.

Further, the power management system BMS has a large current passive balancing function. After the design is automatically reduced and a plurality of times of charge and discharge cycles are carried out, the voltage difference between the single lithium batteries effectively prolongs the service life of the lithium battery pack, and therefore the service life of the module is prolonged.

Furthermore, the box body and the single lithium battery are both in a cuboid shape.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic structural diagram of the single lithium battery of the present invention.

Fig. 4 is a partially enlarged schematic view of C in fig. 2.

Fig. 5 is a partially enlarged schematic view of a portion B in fig. 2.

Fig. 6 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 7 is a partially enlarged schematic view of fig. 2 at D.

The battery pack comprises a box body 1, a shell 2, a partition rib 2a, a wire groove 2b, a buckle 2c, an end cover 3, a wire groove 3a, a lithium battery pack 4, a single lithium battery 401, a pole 401a, a support 5, a lower jack 5a, a separation sheet 5b, a clamping groove 5c, a power management system BMS6, an upper jack 601, a charging and discharging wire harness 602, a fuse 602a, a plug 602b and a wire harness rubber sleeve 602 c.

Detailed Description

As shown in fig. 1 to 7, a novel lithium battery pack module includes a case 1; the box body 1 comprises a shell 2 and an end cover 3 arranged at the top of the shell 2; the lithium battery pack 4, the bracket 5 and the power management system BMS6 are sequentially arranged in the box body 1 from bottom to top; the lithium battery pack 4 includes a plurality of single lithium batteries 401; a pole 401a is arranged on the positive electrode and the negative electrode of each single lithium battery 401; a plurality of lower insertion holes 5a corresponding to the poles 401a are arranged on the bracket 5; the power management system BMS6 is provided with a plurality of upper jacks 601 corresponding to the lower jacks 5 a; each pole 401a sequentially penetrates through the corresponding lower jack 5a and the corresponding upper jack 601, and is electrically connected with the power management system BMS 6; the power management system BMS6 is further provided with a charging/discharging harness 602 extending from the inside of the case 1, and the extending portion of the charging/discharging harness 602 is provided with a fuse 602a and a plug 602 b.

The post 401a is L-shaped, and the post 401a and the power management system BMS6 are connected by soldering.

The inner sides of the front panel and the rear panel of the shell 2 are respectively provided with a plurality of separation ribs 2a for separating and positioning a plurality of single lithium batteries 401; the lower end surface of the bracket 5 is provided with a plurality of separation sheets 5b for separating and positioning a plurality of single lithium batteries 401.

A plurality of buckles 2c are arranged on the inner side of the upper port of the shell 2; and a plurality of clamping grooves 5c matched with the buckles 2c are formed around the support 5.

The shell 2 and the end cover 3 are made of plastics; the shell 2 and the end cover 3 are welded and sealed by ultrasonic welding.

An upper wire passing groove 3a is arranged on the end cover 3, and a lower wire passing groove 2b corresponding to the upper wire passing groove 3a is arranged on the shell 2; the charging and discharging wire harness 602 extends out of the box body 1 through the upper wire passing groove 3a and the lower wire passing groove 2b, and a wire harness rubber sleeve 602c is arranged at the matching position of the charging and discharging wire harness 602 and the upper wire passing groove 3a and the lower wire passing groove 2 b.

The power management system BMS6 has a high current passive equalization function.

The case 1 and the single lithium battery 401 are each rectangular.

During assembly, firstly, the single lithium batteries 401 are sequentially placed into the shell 2 along the separating ribs 2a until the whole lithium battery pack 4 is completely placed into the shell 2; then the bracket 5 is installed, attention is paid to align the pole 401a, the pole 401a penetrates through the lower insertion hole 5a, and the clamping groove 5c is matched with the buckle 2c to be locked and fixed; then, installing the power management system BMS6, paying attention to the pole 401a, inserting the pole 401a into the corresponding upper jack 601 again after the pole 401a passes through the corresponding lower jack 5a, and matching and installing the wire harness rubber sleeve 602c with the lower wire passing groove 2 b; then, soldering is sequentially performed, so that each pole 401a is electrically connected with the power management system BMS 6; then, aligning the wiring harness rubber 602c and installing the upper end cover 3, so that the upper wire passing groove 3a is matched with the wiring harness rubber sleeve 602 c; and finally, carrying out ultrasonic welding sealing on the joint of the end cover 3 and the shell 2 by an ultrasonic plastic welding machine.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.

Claims

1. A novel lithium battery pack module is characterized in that: the lithium battery pack module comprises a box body (1); the box body (1) comprises a shell (2) and an end cover (3) arranged at the top of the shell (2); a lithium battery pack (4), a bracket (5) and a power management system BMS (6) are sequentially arranged in the box body (1) from bottom to top;

the lithium battery pack (4) comprises a plurality of single lithium batteries (401); a pole column (401 a) is arranged on each of the positive electrode and the negative electrode of each single lithium battery (401);

a plurality of lower insertion holes (5 a) corresponding to the pole posts (401 a) are formed in the support (5);

the power management system BMS (6) is provided with a plurality of upper jacks (601) corresponding to the lower jacks (5 a); each pole (401 a) sequentially penetrates through the corresponding lower jack (5 a) and the corresponding upper jack (601), and is electrically connected with the power management system BMS (6);

the power management system BMS (6) is also provided with a charging and discharging wire harness (602) extending out of the interior of the box body (1), and the extending part of the charging and discharging wire harness (602) is provided with a fuse (602 a) and a plug (602 b).

2. The novel lithium battery pack module as claimed in claim 1, wherein the pole (401 a) is L-shaped, and the pole (401 a) is connected with the power management system BMS (6) by soldering.

3. The novel lithium battery module as claimed in claim 1, characterized in that: the inner sides of the front panel and the rear panel of the shell (2) are respectively provided with a plurality of separating ribs (2 a) for separating and positioning a plurality of single lithium batteries (401); the lower end face of the support (5) is provided with a plurality of separating sheets (5 b) for separating and positioning the plurality of single lithium batteries (401).

4. The novel lithium battery module as claimed in claim 1, characterized in that: a plurality of buckles (2 c) are arranged on the inner side of the upper port of the shell (2); and a plurality of clamping grooves (5 c) matched with the buckles (2 c) are further formed in the periphery of the support (5).

5. The novel lithium battery module as claimed in claim 1, characterized in that: the shell (2) and the end cover (3) are made of plastics; the shell (2) and the end cover (3) are welded and sealed in an ultrasonic welding mode.

6. The novel lithium battery module as claimed in claim 1, characterized in that: an upper wire passing groove (3 a) is formed in the end cover (3), and a lower wire passing groove (2 b) corresponding to the upper wire passing groove (3 a) in position is formed in the shell (2); the charging and discharging wire harness (602) penetrates through the upper wire passing groove (3 a) and the lower wire passing groove (2 b) to extend out of the box body (1), and a wire harness rubber sleeve (602 c) is arranged at the matching position of the charging and discharging wire harness and the upper wire passing groove (3 a) and the lower wire passing groove (2 b).

7. The novel lithium battery module as claimed in claim 1, characterized in that: the power management system BMS (6) has a high-current passive balancing function.

8. The novel lithium battery module as claimed in claim 1, characterized in that: the box body (1) and the single lithium battery (401) are both in a cuboid shape.