CN219144404U

CN219144404U - Electric connector for soft package battery pack, cover plate assembly and soft package battery module

Info

Publication number: CN219144404U
Application number: CN202223068408.1U
Authority: CN
Inventors: 袁少伟; 雷政军; 翟腾飞
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2022-11-19
Filing date: 2022-11-19
Publication date: 2023-06-06
Anticipated expiration: 2032-11-19

Abstract

The utility model provides an electric connector for a soft-package battery pack, a cover plate assembly and a soft-package battery module, which mainly solve the problems of low reliability and large contact resistance of the electric connection of the traditional soft-package battery. The electric connector comprises a bus plate and a pole; the bus plate is provided with a plurality of first slots for allowing the lugs of each soft battery in the soft battery pack to pass through and be electrically connected with the bus plate after being contacted; the post sets up on the terminal surface of busbar board, and with the integrative setting of busbar board. The bus plate and the pole in the electric connecting piece are integrally arranged, so that the current can be converged and led out by one electric connecting piece, the mode not only improves the reliability of the electric connection of the soft batteries, but also reduces the contact resistance of the electric connection of the parts, thereby improving the performance of the battery, and in addition, the electric connection of the soft batteries is realized by one electric connecting piece, the installation parts of the battery pack are reduced, and the installation process is simplified.

Description

Electric connector for soft package battery pack, cover plate assembly and soft package battery module

Technical Field

The utility model belongs to the field of batteries, and particularly relates to an electric connector for a soft package battery pack, a cover plate assembly and a soft package battery module.

Background

Lithium ion batteries are mainly divided into three categories of square, cylindrical and soft package; wherein, square lithium ion battery and cylinder lithium ion battery mainly adopt shells such as aluminum alloy, stainless steel, and soft package lithium ion battery mainly adopts plastic-aluminum membrane cladding to form the shell. The structure of the soft pack battery provides a series of advantages such as good safety performance, light weight, small internal resistance, good cycle performance, etc.

Because the soft package battery has the advantages, a plurality of soft package batteries can be assembled into a soft package battery pack in parallel at present and then are serially connected to be applied to the fields of energy storage, power batteries and the like. However, how to reliably connect a plurality of soft-pack batteries in parallel, so that the soft-pack batteries can be safely and reliably used is a key for safe operation of the soft-pack battery pack.

Chinese patent CN 214797651U discloses a tab connection structure of soft package battery module, this tab connection structure is including installing the electric core support at soft package battery top, set up the metal connection piece at electric core support inboard, install the metal pressing plate at metal connection piece top, be equipped with a plurality of through grooves on the metal connection piece, the through groove corresponds with the tab position of soft package battery, the tab passes the through groove of metal connection piece, the bending part laminating that the tab formed after bending is at the surface of metal connection piece and through laser welding fixed. The tab in the structure is tightly attached to the metal connecting sheet, so that the problem of cold joint caused by laser welding is avoided, and the battery assembly quality is improved. However, this structure does not explain how the parallel current is drawn.

In order to lead out the parallel current, chinese patent CN 212783560U discloses a soft package lithium ion battery module, which comprises a soft package lithium ion battery, a parallel plate, an electrode press plate, a battery upper cover, a lead-out polar column and a polar ear lining plate; the lug lining plate is a strip-shaped metal plate welded on the upper surface of the parallel connection plate, and a riveting nut is arranged on the lug lining plate; the upper side of the parallel plate is provided with a lug penetrating hole along the outer side of the long side of the lug lining plate; the battery tab is provided with a tab hole, the tab passes through the tab hole and is turned over on the tab lining plate at right angles, and the tab hole is aligned with the riveting nut; the electrode pressing plate is provided with a perforation, the electrode pressing plate is pressed on the turnover surface of the lug, and the perforation is aligned with the lug hole; the fixing screw sequentially passes through the through holes and the lug holes to be fixed with the riveting nut; the electrode pressing plate is provided with an extraction pole post which penetrates out of the upper cover of the battery and then is fixed.

Above-mentioned soft packet of lithium ion battery module draws forth the electric current after with a plurality of soft packet of batteries parallelly connected through electrode crimping board, however, the electricity in this battery module is connected through a plurality of parts such as parallel plate, utmost point ear welt and electrode crimping board and is realized, and the connection of a plurality of parts leads to the reliability of electricity to connect to reduce by a wide margin, and simultaneously, parallel plate and electrode crimping board pass through bolted connection, and bolted connection can increase the contact resistance of electricity connection to influence the performance of battery.

Disclosure of Invention

In order to solve the problems of low reliability and large contact resistance in the electric connection of the conventional soft-package battery pack, the utility model provides an electric connector for the soft-package battery pack, a cover plate assembly and a soft-package battery module.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

an electrical connector for a soft pack battery pack includes a bus plate and a post; the bus plate is provided with a plurality of first slots for allowing the lugs of each soft battery in the soft battery pack to pass through and be electrically connected with the bus plate after being contacted; the terminal post sets up on the terminal surface of cylinder manifold (this terminal surface is the surface that the cylinder manifold kept away from soft packet of group battery), and with the integrative setting of cylinder manifold, because the cylinder manifold and the terminal post of above-mentioned electric connection spare are integrated into one piece structure for a plurality of soft packet of batteries can realize parallelly connected through a part, have solved the current soft packet of group battery and have realized the problem that the reliability is low and contact resistance is big when parallelly connected through a plurality of parts.

Further, the first slot is an open slot, namely one side of the first slot is communicated with the bus plate, so that when the tab is installed, the tab can be inserted from one side of the bus plate, and compared with a downward and upward insertion mode, the side surface insertion is more convenient and rapid, and the installation and detachment efficiency is improved.

Further, the plurality of first slots are arranged in parallel in a first area of the bus plate, the pole is arranged in a second area of the bus plate, the first area and the second area are two areas distributed along the length direction of the bus plate, or the first area and the second area are two areas distributed along the width direction of the bus plate. Carry out the subregion with first slot and utmost point post and set up, not only make the busbar in limited region, can set up more first slot, and then can parallelly connected more soft packet of battery to reach the demand that promotes battery capacity, still can reach the purpose that saves space simultaneously, can also be simultaneously the efficient with soft packet of group battery and the heat transfer that the busbar produced to the utmost point post on, thereby carry out centralized processing.

Further, through grooves are formed in the pole, the through grooves can be formed in the side faces or the top faces of the pole, the through directions of the through grooves are parallel to the arrangement directions of the first slots, heat transfer pipes (the heat transfer pipes are heat pipes or liquid cooling pipes) can be arranged in the through grooves, heat generated by the soft package battery pack and the bus plate is timely transferred into the heat transfer pipes in the through grooves through the pole, and is conducted out through the heat pipes, so that heat concentration of the battery is avoided, and meanwhile, the phenomenon that the temperature of the soft package battery is too high is avoided, and the normal operation of the soft package battery is influenced.

The utility model also provides a cover plate assembly, which comprises a cover plate and two electric connecting pieces for the soft package battery pack; at least two through holes are formed in the cover plate; the pole of the electric connecting piece passes through the through hole, and the cover plate is arranged in an insulating way with the electric connecting piece.

Further, the cover plate assembly further comprises an insulation support arranged between the bus plate and the soft package battery pack, and a plurality of second slots for allowing the lugs of each soft package battery in the soft package battery pack to pass through are arranged on the insulation support. This insulating support can reliably support when being connected to utmost point ear and busbar electricity, prevents busbar and soft packet of battery casing contact, also carries out further restriction to the removal and the deformation of utmost point ear to can avoid the utmost point ear welding fracture that leads to because of vibration, deformation and weld.

Further, be provided with insulating splint between apron and the busbar board, be provided with the reference column on the insulating splint, be provided with on the insulating support with reference column complex locating hole, the cooperation that insulating support and insulating splint pass through reference column and locating hole for the assembly of whole apron is more accurate and reliable.

Further, a sealing rubber ring is arranged in the through hole of the cover plate and used for sealing the joint of the pole and the cover plate.

Further, the pole is located the outside of apron and still is equipped with the welding ring in the cover, welding ring and pole welding compress tightly the sealing rubber ring simultaneously.

The utility model also provides a soft package battery module which comprises a plurality of soft package batteries and the cover plate assembly, wherein the positive electrode lugs and the negative electrode lugs of the soft package batteries respectively penetrate through the first slots of the two bus plates, are bent and are welded with the bus plates.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the bus plate and the pole in the electric connecting piece are integrally arranged, so that the current can be converged and led out by a plurality of soft package batteries through one electric connecting piece; in addition, the electric connection is realized through one electric connector, so that the installation components of the soft package battery pack are reduced, and the installation process is simplified.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electrical connector in embodiment 1 of the present utility model;

fig. 2 is a schematic structural diagram of an electrical connector in embodiment 2 of the present utility model;

FIG. 3 is a schematic view of a cover plate assembly according to embodiment 3 of the present utility model;

fig. 4 is a schematic structural diagram of a soft pack battery module according to embodiment 4 of the present utility model;

fig. 5 is a schematic diagram of a soft pack battery module according to embodiment 4 of the present utility model.

Reference numerals: the device comprises a 1-electric connector, a 2-cover plate, a 3-insulating support, a 4-insulating clamping plate, a 5-sealing rubber ring, a 6-welding ring, a 7-soft package battery, an 8-heat transfer tube, an 11-bus plate, a 12-pole, a 13-first slot, a 14-through slot, a 15-first area, a 16-second area, a 21-through hole, a 31-second slot, a 32-positioning hole, a 41-positioning column and a 71-pole lug.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

Example 1

As shown in fig. 1 and 5, the present embodiment provides an electrical connector for a soft pack battery pack, the electrical connector 1 including a bus plate 11 and a post 12; the busbar board 11 is provided with a plurality of first slots 13 for the tab 71 of each soft pack battery 7 in the soft pack battery pack passes through and is electrically connected with the busbar board 11 after contacting, so that the tab 71 passes through conveniently, the shape of the first slots 13 is matched with the shape of the cross section of the tab 71, and the first slots 13 are preferably rectangular slots because the cross section of the tab 71 of the existing soft pack battery 7 is rectangular, the size of the rectangular slots is slightly larger than the size of the tab 71, the tab 71 is ensured to pass through the slots, and if the size of the rectangular slots is too large compared with the size of the cross section of the tab 71, the positioning accuracy of the tab 71 in the first slots 13 is poor, so that the subsequent welding quality is poor. The above-mentioned post 12 is disposed on the end surface of the bus plate 11 facing away from the soft-pack battery, and is integrally disposed with the bus plate 11, that is, the post 12 may be integrally extruded or cast with the bus plate 11, the post 12 may be a cylindrical structure, and may be a cylindrical body or a rectangular cylinder, preferably, the post 12 is a rectangular cylinder, and the rectangular cylinder may increase the connection area with the bus plate 11, thereby increasing the current flow area.

The bus plate 11 and the pole 12 may be made of a metal having good electrical conductivity, for example, copper and aluminum, and the copper and aluminum may have good electrical conductivity, so that the connection with the tab 71 of the pouch cell is more reliable.

Example 2

As shown in fig. 2 and 4, the present embodiment provides an electrical connector for a soft pack battery pack, the electrical connector 1 including a bus plate 11 and a post 12; unlike embodiment 1, this embodiment provides a partitioned arrangement of the first slot 13 and the pole 12, and the first slot 13 and the pole 11 do not affect each other at the time of installation. For example, the plurality of first slots 13 are disposed in parallel in the first region 15 of the bus plate 11, the pole 12 is disposed in the second region 16 of the bus plate 11, the first region 15 and the second region 16 are two regions distributed along the length direction of the bus plate 11, or the first region 15 and the second region 16 are two regions distributed along the width direction of the bus plate 11. Carry out the subregion with first slot 13 and utmost point post 12 and set up, not only make busbar 11 in limited region, can set up more first slots 13, and then can parallelly connected more soft packet battery, but also can be with soft packet group battery and the heat that busbar 11 produced all fine transmission to the utmost point post 12 on, and then concentrate the heat that produces a plurality of soft packet batteries and busbar department through utmost point post 12 and handle.

In order to perform the heat centralized processing, in this embodiment, the through groove 14 is provided on the pole 12, and the through groove 14 may be provided with a heat transfer pipe (a heat pipe or a liquid cooling pipe), so that the heat generated by the soft package battery pack and the bus plate 11 is timely conducted out through the pole 12 and transferred to the heat transfer pipe in the through groove 14, thereby avoiding heat concentration of the battery, and avoiding the influence of overhigh temperature of the soft package battery on the normal operation of the soft package battery.

In this embodiment, the first slot 13 is an open slot, that is, the first slot 13 penetrates through the bus plate 11 at a side far away from the pole 12, so that when the tab 71 is installed, the tab can be inserted from one side of the bus plate 11, and compared with the downward and upward insertion mode, the side insertion is more convenient and rapid, and the installation and detachment efficiency is improved.

Example 3

As shown in fig. 3, the present embodiment provides a cover plate assembly including a cover plate 2 and the electrical connector 1 of embodiment 1 or embodiment 2. At least two through holes 21 are arranged on the cover plate 2, if the number of the through holes 21 exceeds two, two through holes 21 are provided for the pole 12 to pass through, and the rest through holes are used as liquid injection holes or pressure relief openings; the pole 12 of the electrical connector 1 passes through the through hole 21, and the cover plate 2 and the electrical connector 1 are insulated, which can be achieved in various manners, for example, an insulating pad is provided, an insulating adhesive is coated, and the like, in this embodiment, an insulating clamping plate 4 is provided between the cover plate 2 and the bus plate 11, and the insulating clamping plate 4 is of a plate-shaped structure with a certain hardness, and can be specifically made of polytetrafluoroethylene, so that insulation can be achieved, and support for the cover plate 2 can also be achieved. In addition, a heat transfer tube 8 (heat pipe or liquid cooling tube) can be disposed in the through groove 14 of the electrical connector 1, so that heat generated by the soft battery pack and the bus plate 11 can be timely conducted out through the pole 12.

In this embodiment, the cover assembly further includes an insulation support 3 disposed between the bus plate 11 and the soft battery pack, and a plurality of second slots 31 through which the tabs 71 of each soft battery 7 in the soft battery pack pass are disposed on the insulation support 3, where the positions of the second slots 31 are a plurality of strip-shaped slits through which the tabs 71 of the soft battery pack pass conveniently, and correspond to the positions of the first slots. The insulating support 3 can support the electric connector 1 and the tab 71 when being connected, so that the tab 71 and the bus plate 11 are electrically connected with good consistency, and subsequent installation is facilitated. In addition, this insulating support 3 can also fix a position the welding position of utmost point ear 71 and busbar 11 to and can fill up real with soft packet of battery root neutral gear department, make things convenient for utmost point ear and utmost point post to compress tightly the welding.

In addition, the insulating clamping plate 4 may be provided with a positioning column 41, and the insulating support 3 may be provided with a positioning hole 32 matching with the positioning column 41. The insulating support 3 and the insulating clamping plate 4 are accurately positioned through the positioning posts 41 and the positioning holes 32. The insulating clamping plate 4 is used for insulating the bus plate 11 and the cover plate 2, and is provided with the positioning column 41 and the positioning hole 32, firstly, the insulating clamping plate 4 is positioned, secondly, the position of the pole 12 is limited by positioning the insulating clamping plate 4, the position of the pole 12 is accurate, the installation and the matching of the pole 12 and the cover plate 2 are ensured, and meanwhile, the gap insulation between the left and the right of the bus plate 11 and the outer shell is ensured, so that the whole cover plate 2 is assembled more accurately and reliably.

In the present embodiment, a seal rubber ring 5 may be provided in the through hole 21 of the cover plate 2, and the seal rubber ring 5 functions: firstly, insulation between the pole 12 and the cover plate 2 is ensured, and secondly, reliable sealing of the joint of the pole 12 and the cover plate 2 is ensured. In addition, the pole 12 is located the outside of apron 2 still the cover is equipped with weld ring 6, and weld ring 6 and pole 12 welding set up weld ring 12, firstly can be to the position location of pole 12 height, secondly adopt the weld ring to seal up sealing rubber ring 5 compresses tightly, further guarantee sealing rubber ring 5's reliable seal and insulation.

Example 4

As shown in fig. 4 and 5, the present embodiment provides a pouch battery module including a plurality of pouch batteries 7 and the cover plate assembly of embodiment 3, and tabs 71 (including positive tabs and negative tabs) of the plurality of pouch batteries 7 respectively pass through slots of two bus plates 11, are bent, and are welded with the bus plates 11.

The installation process of the soft package battery module of the embodiment is as follows: the insulation support 3 is inserted into the lugs of the soft-pack battery pack from top to bottom, the lugs 71 of the soft-pack battery are penetrated out of the second slots 31 of the insulation support 3, then the electric connecting pieces 1 are placed above the insulation support 3, the positive lugs 71 and the negative lugs 71 of all the soft-pack batteries 7 are penetrated out of the first slots 13 of the two electric connecting pieces 1 respectively in the same way, the lugs 71 of the soft-pack battery are bent and are ensured to be flat, and then the lugs 71 of the soft-pack battery and the bus plate 11 are welded through laser welding. And then the insulating clamping plate 4 is installed and matched and positioned through the positioning holes 32 and the positioning columns 42, after the insulating clamping plate 4 is installed in place, the cover plate 2 is installed from top to bottom, and as the sealing rubber ring 5 is arranged at the matched position of the cover plate 2 and the pole 12, the cover plate 2 is pressed in place by applying force, so that the sealing rubber ring 5 and the pole 12 are tightly combined. After the cover plate 2 is installed in place, the welding ring 6 is installed, the sealing rubber ring 5 is compressed, and then the welding ring 6 and the pole 12 are welded, so that sealing is ensured.

Claims

1. An electric connector for a soft package battery pack is characterized by comprising a bus plate and a pole;

the bus plate is provided with a plurality of first slots for allowing the lugs of each soft battery in the soft battery pack to pass through and be electrically connected with the bus plate after being contacted;

the pole is arranged on the end face of the bus plate and is integrally arranged with the bus plate.

2. The electrical connector for a pouch battery of claim 1, wherein the first slot is an open slot.

3. The electrical connector for a pouch pack of claim 2, wherein the plurality of first slots are disposed in parallel in a first region of the bus plate, the posts are disposed in a second region of the bus plate, the first and second regions are two regions distributed along a length direction of the bus plate, or the first and second regions are two regions distributed along a width direction of the bus plate.

4. An electrical connector for a flexible battery pack as claimed in claim 1, 2 or 3, wherein the post is provided with a through slot for mounting a heat transfer tube.

5. A cover assembly comprising a cover and two electrical connectors for a pouch battery as claimed in any one of claims 1 to 4;

at least two through holes are formed in the cover plate;

the pole of the electric connecting piece passes through the through hole, and the cover plate is arranged in an insulating way with the electric connecting piece.

6. The cover plate assembly of claim 5, further comprising an insulating support disposed between the manifold plate and the pouch battery pack, the insulating support having a plurality of second slots disposed therein for the tabs of each pouch battery in the pouch battery pack to pass through.

7. The cover plate assembly of claim 6, wherein an insulating clamping plate is arranged between the cover plate and the bus plate, positioning posts are arranged on the insulating clamping plate, and positioning holes matched with the positioning posts are formed in the insulating support.

8. The cover plate assembly of claim 7, wherein a sealing rubber ring is disposed in the through hole of the cover plate for sealing the junction of the pole and the cover plate.

9. The cover plate assembly of claim 8, wherein the pole is further sleeved with a weld ring on the outside of the cover plate, the weld ring being welded to the pole while simultaneously compressing the sealing rubber ring.

10. The soft package battery module is characterized by comprising a plurality of soft package batteries and the cover plate assembly according to any one of claims 5 to 9, wherein positive lugs and negative lugs of the soft package batteries respectively penetrate through first slots of the two bus plates, are bent and are respectively welded with the two bus plates.