CN212517403U

CN212517403U - Battery shell and battery module

Info

Publication number: CN212517403U
Application number: CN202021259546.6U
Authority: CN
Inventors: 杨尚勇; 杨德财; 娄隆圣; 邹立浩; 王全军
Original assignee: Fujian Super Power New Energy Co ltd
Current assignee: Fujian Super Power New Energy Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-02-09
Anticipated expiration: 2030-07-01

Abstract

The utility model provides a pair of battery case and battery module, wherein battery case includes casing, lower casing, mass flow row and fixed ear. The utility model provides a scheme is on current soft packet of large capacity battery basis, remain electric core large capacity and jumbo size advantage, increase monomer electricity core structural strength and independence, improve its suitability, extend the application scene, can be directly by the monomer electric core integrated battery system of this application, realize modular structure, omit the step of assembling into the battery box, compare with traditional battery box, the installation, dismantle, the transportation, maintenance etc. convenient and fast more, practice thrift manufacturing cost, and simultaneously, the interval is bigger between this battery system's the electric core, the system thermal diffusivity is better.

Description

Battery shell and battery module

Technical Field

The utility model belongs to the technical field of the lithium cell, especially, relate to a battery case and battery module.

Background

Most of the existing lithium battery products are formed by connecting a plurality of small-capacity lithium battery monomers in series and in parallel to form a battery module or a battery box body with certain capacity, and then the battery module or the battery box is connected in series and in parallel to form a battery system with larger capacity so as to meet various power consumption requirements; however, the battery combination mode has many defects, the requirement on the consistency of the battery cores in parallel connection is high, the influence of the single battery cores on the whole module and even the system performance is large, connecting lines need to be designed among the monomers, the electric quantity loss is increased due to excessive contact points, and the risk of poor conduction is increased; in addition, the weight and the volume of single battery module or battery box are often very big, and installation, dismantlement, transportation are all inconvenient, and the airtight box internal air mobility is poor, lead to the heat dissipation very poor, often need install heat dissipation equipment alone, and the cost is on the high side.

The technology of soft-package large-capacity batteries appears in the market at present, the problems of parallel connection and series-parallel connection of battery modules are solved to a certain extent, but the battery box is still formed by single battery cells firstly in a grouping mode, and then the battery box forms a battery system. The problems of difficult installation, disassembly and transportation and poor heat dissipation still exist, and the production cost is higher due to purchasing the battery box and parts thereof.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing a battery shell, which mainly comprises an upper shell, a lower shell, a flow collecting bar and a fixing lug.

In particular, the method comprises the following steps of,

the middle part of the opposite side of the upper shell and the lower shell is provided with a soft-package electric core groove, the lateral parts of the opposite side of the upper shell and the lower shell are provided with a flow-collecting discharge groove, and the soft-package electric core groove is communicated with the flow-collecting discharge groove. During the equipment, go up casing and lower casing and close and fixed, go up casing and casing down the synthetic complete soft-packaged battery cell built-in chamber in soft-packaged battery cell groove goes up casing and casing down the synthetic complete mass flow row built-in groove in mass flow row groove goes up casing and casing down, and soft-packaged battery cell built-in chamber and the mass flow row built-in groove also communicate this moment.

The current collecting bar is arranged in the current collecting bar built-in groove, one surface of the current collecting bar is close to the built-in cavity of the soft package battery cell, and the other surface of the current collecting bar is exposed;

the fixed lug is U-shaped, clamps the upper shell and the lower shell after the combination, and is fixedly connected with the upper shell and the lower shell, and the fixed lug is arranged on one side of the shell with the built-in groove of the current collecting bar, and further pinches the upper shell, the lower shell and the built-in current collecting bar.

Preferably, there are two current collecting bars, which correspond to the positive and negative electrodes of the soft package battery cell respectively.

Preferably, the fixing ears are three in number and comprise two lateral fixing ears and a middle fixing ear.

Preferably, fixed ear includes two fixed ears of side, the fixed ear of side is relative the side of going up casing and lower casing is equipped with convex outer piece, be equipped with the mounting hole on the outer piece.

Preferably, the upper shell and the lower shell correspond to the positions of the fixing lugs respectively and are provided with mounting grooves, through holes are formed in the mounting grooves, and correspondingly, the through holes are also formed in the two side plates of the U-shaped groove of the fixing lugs. During installation, the two side plates of the fixing lug are inserted into the installation groove, the fixing lug clamps the upper shell and the lower shell and penetrates through the through hole through a rivet or a screw nut to fix the upper shell, the lower shell and the fixing lug.

Preferably, the upper shell and the lower shell respectively comprise a shell plate and a lug support, and the shell plate and the lug support are fixedly connected through a screw nut or a rivet; the soft package electric core groove is arranged in the shell plate, and the current collecting and discharging groove is arranged in the tab support.

Preferably, the shell plate corresponds the mounted position of utmost point ear support is equipped with spacing lug, and is corresponding, utmost point ear support is equipped with spacing recess, and during the equipment, utmost point ear support is placed in the shell plate and is had one side of soft packet of battery cell, and fixes a position through spacing lug and spacing recess.

Preferably, the limiting lug is provided with a limiting column, correspondingly, the limiting groove is internally provided with a limiting hole or a limiting groove, the limiting hole or the limiting groove is in a strip shape, and the shell plate and the lug support can be further limited through the limiting column and the limiting hole or the limiting groove.

The utility model provides a battery module, includes foretell battery case and laminate polymer battery core, laminate polymer battery core installs in the built-in chamber of laminate polymer battery core, laminate polymer battery core's utmost point ear welding is in on the mass flow row.

Preferably, the soft package battery core is fixed with the upper shell and the lower shell by structural adhesive.

The utility model has the advantages that:

1. on the basis of the existing soft package high-capacity battery, the advantages of high capacity and large size of the battery cell are reserved, the structural strength and independence of the single battery cell are improved, the applicability of the battery cell is improved, and the application scene is expanded;

2. the battery system can be directly integrated by the single battery cell, a modular structure is realized, the step of assembling a battery box is omitted, and the production cost is saved;

3. the battery system is integrated by the single battery cells, the intervals among the battery cells are larger, and the heat dissipation performance of the system is better;

4. the single battery core of application is for the battery box, and installation/dismantlement, transportation, maintenance etc. are convenient and fast more.

Drawings

Fig. 1 is a schematic structural view (exploded view) of a battery case and a battery module;

fig. 2 is a schematic structural view (axial side view) of a battery case and a battery module;

fig. 3 is a schematic structural view (front view) of a battery case and a battery module;

fig. 4 is a schematic structural view (side view) of a battery case and a battery module;

fig. 5 is a schematic structural view (sectional view) of a battery case and a battery module;

fig. 6 is a schematic structural view (partially enlarged view) of a lower case of the battery case;

the labels in the figures are: the battery comprises an upper shell 10, a lower shell 20, a soft-package battery cell 21, a current collecting and discharging groove 22, a shell plate 23, a limiting lug 231, a limiting column 232, a tab support 24, a limiting groove 241, a limiting hole 242, a current collecting and discharging 30, a fixing lug 40, an external connecting block 41 and a soft-package battery cell 50.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Those not described in detail in this specification are within the skill of the art. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The first embodiment is as follows:

referring to fig. 1 to 6, a battery case mainly includes an upper case 10, a lower case 20, a current collecting tab 30 and a fixing tab 40.

The middle part of the opposite side of the upper shell 10 and the lower shell 20 is provided with a soft package electric core groove 21, the lateral part of the opposite side of the upper shell 10 and the lower shell 20 is provided with a current collecting discharge groove 22, and the soft package electric core groove 21 is communicated with the current collecting discharge groove 22. During assembly, the upper shell 10 and the lower shell 20 are combined and fixed, the soft package battery cell 21 of the upper shell 10 and the lower shell 20 are combined into a complete soft package battery cell built-in cavity, the current collecting and discharging slot 22 of the upper shell 10 and the lower shell 20 are combined into a complete current collecting and discharging 30 built-in slot, and the soft package battery cell built-in cavity and the current collecting and discharging 30 built-in slot are also communicated at the moment.

In this embodiment, in order to reduce the shaping degree of difficulty of spare part, go up casing 10 and lower casing 20 and equally divide into casing board 23 and utmost point ear support 24 two independent parts, casing board 23 and utmost point ear support 24 pass through screw nut or rivet fixed connection. The soft package electric core groove 21 is arranged in the shell plate 23, and the current collecting and discharging groove 22 is arranged in the tab support 24.

In order to improve the convenience of installation, the mounting position of the shell plate 23 corresponding to the tab support 24 is provided with a limiting projection 231, and correspondingly, the tab support 24 is provided with a limiting groove 241; the limiting convex block 231 is provided with a limiting column 232, correspondingly, a limiting hole 242 is arranged in the limiting groove 241, and the limiting hole 242 is in a strip shape. During assembly, the tab support 24 is placed on one side of the shell plate 23 having the soft-package electric core groove 21, and is positioned by two sets of limiting structures including the limiting convex block 231, the limiting groove 241, the limiting column 232 and the limiting hole 242.

Two current collecting bars 30 are arranged in the built-in groove of the current collecting bar 30 corresponding to the positive electrode and the negative electrode of the soft package battery core, one surface of each current collecting bar is close to the built-in cavity of the battery pack, and the other surface of each current collecting bar is exposed.

The fixing lug 40 is U-shaped, the fixing lug 40 clamps the combined upper casing 10 and lower casing 20 and is fixedly connected with the upper casing 10 and lower casing 20, the fixing lug 40 is installed on one side of the casing with the built-in slot of the collector bar 30, and further pinches the upper casing 10, lower casing 20 and the collector bar 30 built therein.

In this embodiment, there are three fixing ears 40, including two lateral fixing ears 40 and a middle fixing ear 40. The side fixing lug 40 is provided with a convex external block 41 opposite to the sides of the upper shell 10 and the lower shell 20, the external block 41 is provided with a mounting hole, and the whole battery shell can be fixedly mounted on a required occasion through the external block 41.

For the convenience of further improvement equipment, it corresponds to go up casing 10 and lower casing 20 the position of fixed ear 40 all is equipped with the mounting groove, set up the through-hole in the mounting groove, correspond, the through-hole has also been seted up to the both sides board in the U type groove of fixed ear 40, during the installation, the both sides board of fixed ear 40 inserts the mounting groove, fixed ear 40 is cliied go up casing 10 and lower casing 20 to pass through the rivet casing 10, lower casing 20 and fixed ear 40 are gone up in the through-hole is fixed.

In the present embodiment, the case plate 23, the tab support 24 and the fixing tab 40 are fixed by the same set of blind rivets, and are also fixed by rivets and through holes at other positions of the upper case 10 and the lower case 20, so as to form a complete battery case.

Example two:

a battery module, please refer to fig. 1 to fig. 6, which includes a battery case and a pouch cell 50 according to the first embodiment.

Soft-packaged electrical core 50 is installed in the built-in chamber of soft-packaged electrical core, it is fixed with adopting the structure to glue the adhesion between last casing 10 and the lower casing 20 for soft-packaged electrical core 50, the utmost point ear welding of soft-packaged electrical core 50 is in on the mass flow row 30.

The specific assembly process is as follows, and reference is made to fig. 1 and 6, where fig. 6 is a cross-sectional view taken along the middle of the middle fixing lug 40: the lower shell 20 is placed firstly, the current collecting bar 30 is placed in a current collecting bar groove 22 of a lug support 24, the soft package battery cell 50 is placed in a soft package battery cell groove 21, the contact surface of the soft package battery cell 50 and the lower shell 20 is fixed through structural adhesive, lugs are welded and fixed on the current collecting bar 30 respectively, then the upper shell 10 is buckled, the contact surface of the soft package battery cell 50 and the upper shell 10 is fixed through structural adhesive, the side fixing lugs 40 and the middle fixing lugs 40 are sleeved respectively, and finally all reserved through holes are locked and fixed through self-plugging rivets.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A battery case, characterized in that:

comprises an upper shell, a lower shell, a collecting bar and a fixing lug;

the middle part of one surface of the upper shell, which is opposite to the lower shell, is provided with a soft-package electric core groove, the side part of one surface of the upper shell, which is opposite to the lower shell, is provided with a flow-collecting discharge groove, and the soft-package electric core groove is communicated with the flow-collecting discharge groove; the upper shell and the lower shell are combined and fixed, the soft-package battery cell slots of the upper shell and the lower shell are combined into a complete soft-package battery cell built-in cavity, and the current collecting row slots of the upper shell and the lower shell are combined into a complete current collecting row built-in slot;

the fixing lugs are U-shaped, clamp the combined upper shell and the lower shell and are fixedly connected with the upper shell and the lower shell.

2. A battery housing as defined in claim 1, wherein:

the two current collecting bars are respectively corresponding to the positive electrode and the negative electrode of the soft package battery cell.

3. A battery housing as defined in claim 2, wherein:

the fixed ear has three, including two fixed ears of side and a fixed ear in middle of.

4. A battery housing as defined in claim 1, wherein:

the fixed ear includes that two sides are fixed the ear, the fixed ear of side is relative the side of going up casing and lower casing is equipped with convex outer piece, be equipped with the mounting hole on the outer piece.

5. A battery housing as defined in claim 1, wherein:

mounting grooves are formed in the positions, corresponding to the fixing lugs, of the upper shell and the lower shell, through holes are formed in the mounting grooves, and correspondingly, through holes are formed in two side plates of a U-shaped groove of each fixing lug; the two side plates of the fixing lug are inserted into the mounting groove, the fixing lug clamps the upper shell and the lower shell and penetrates through the through hole through a rivet or a screw nut to fix the upper shell, the lower shell and the fixing lug.

6. A battery housing as defined in claim 1, wherein:

the upper shell and the lower shell respectively comprise a shell plate and a lug support, and the shell plate and the lug support are fixedly connected through a screw nut or a rivet; the soft package electric core groove is arranged in the shell plate, and the current collecting and discharging groove is arranged in the tab support.

7. A battery housing as defined in claim 6, wherein:

the mounting position that the casing board corresponds utmost point ear support is equipped with spacing lug, and is corresponding, utmost point ear support is equipped with spacing recess.

8. A battery housing as defined in claim 7, wherein:

the limiting lug is provided with a limiting column correspondingly, a limiting hole or a limiting groove is arranged in the limiting groove, and the limiting hole or the limiting groove is in a strip shape.

9. A battery module comprising a battery case and a pouch according to any one of claims 1 to 6;

the soft-package battery cell is installed in the built-in cavity of the soft-package battery cell, and the tab of the soft-package battery cell is welded on the current collecting bar.

10. The battery module according to claim 9, wherein the soft-packaged cell is fixed to the upper and lower cases by structural adhesive.