CN213878242U - Power battery module with end cover - Google Patents

Abstract

The utility model provides a take power battery module of end cover belongs to power battery technical field, including the end cover, the end cover includes end cover main part, locating piece and hoist and mount piece, and the locating piece setting is in the both sides of end cover main part, and the hoist and mount piece sets up the mounting hole that has first recess and level to run through in the upper end of end cover main part. The utility model discloses simple structure, bulk strength is big, when receiving external forces such as extrusion force, can obviously reduce the influence to the electric core of inside, has improved the safety in utilization of battery module.

Description

Power battery module with end cover

Technical Field

The utility model belongs to the technical field of power battery, a power battery module of taking the end cover is related to.

Background

With the development of new energy industry, electric vehicles are more and more widely applied, and soft package lithium ion batteries are widely used in the market due to the advantages of light weight, high specific capacity, good safety performance, small internal resistance, flexible design and the like. Of course, the endurance mileage, the stability and the safety of the battery of the electric vehicle are receiving more and more attention. As the energy density of the lithium ion battery increases, particularly when the high-energy lithium ion battery is overcharged, the lithium ion battery may cause overcurrent and overheating, which may cause explosion or ignition. How to improve electric automobile's security, improve the mechanical strength of module structure, how to postpone lithium ion battery explosion or time of catching fire when lithium ion battery explodes or catches fire, make driver and passenger flee smoothly, become the key of electric automobile development in future.

When the traditional module is tested safely, especially when the extrusion test, the module is deformed greatly. The conventional battery module lacks an improved safety member, and if any battery module explodes or catches fire due to overcurrent and overheating, flame may spread to other adjacent normally operating battery modules, thereby causing the plurality of battery modules to explode in series and further spreading to the entire battery pack and other devices, so that a user is exposed to a risk of safety accidents. The current battery module is single in hoisting form.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to take the power battery module of end cover belongs to power battery technical field, simple structure, and bulk strength is big, when receiving external forces such as extrusion force, can obviously reduce the influence to inside electric core, has improved the safety in utilization of battery module.

In order to solve the technical problem, the utility model discloses a technical scheme is: take power battery module of end cover belongs to power battery technical field, including the end cover, the end cover includes end cover main part, locating piece and hoist and mount piece, and the locating piece sets up in the both sides of end cover main part, and the hoist and mount piece sets up in the upper end of end cover main part, has the mounting hole that first recess and level run through in the end cover main part.

Furthermore, there are two hoisting blocks, and the two hoisting blocks are symmetrically arranged on the same plane.

Further, still include the strengthening rib, the back connection of strengthening rib and end cover main part, the one end of strengthening rib and the back connection of first recess, the other end of strengthening rib and the back connection of locating piece.

Furthermore, the fireproof cover also comprises a fireproof layer, wherein the fireproof layer covers the back surface of the end cover, and the thickness of the fireproof layer is 0.1-2 mm.

Further, the end cover is made of aluminum alloy.

Furthermore, the end cover has two, and two end cover symmetries are installed in the both sides of module main part, and there is the reference column at the both ends of module main part, and the reference column passes the mounting hole and the end cover is connected, and there is the second recess the back of end cover, and there is first arch the both sides of module main part, and first arch inlays to be established in the second recess.

Furthermore, a third groove is formed in the back face of the positioning block, second protrusions are arranged on two sides of the module main body, and the second protrusions are embedded in the third groove.

Further, still include the exhaust hole, the exhaust hole level runs through arbitrary end cover, and the exhaust hole is in the upper end of first recess, and the diameter in exhaust hole is between 16mm ~ 30mm, and the quantity in exhaust hole is 3 ~ 8.

Compared with the prior art, the utility model has the advantages and positive effect as follows:

1. the utility model discloses simple structure, bulk strength is big, when receiving external forces such as extrusion force, can obviously reduce the influence to the electric core of inside, has improved the safety in utilization of battery module.

2. The utility model discloses a locating piece is connected with the battery box, play the fixed action to the battery module, the locating piece avoids electric core to receive physical striking such as colliding with, strikeing including protecting with electric core jointly with the module main part, prevent that external factor or other structures that constitute electric core assembly under various operational environment from to the physical damage that electric core in the battery module caused, avoid arousing the performance deterioration or the stability decline of battery, it is stable to support the battery module, each operating mode that messenger's holistic structural strength of battery module and rigidity adaptation car travel.

3. The utility model discloses an one end of strengthening rib and the back connection of first recess, the other end of strengthening rib and the back connection of locating piece, the intensity of end cover can be strengthened to the strengthening rib, when the end cover receives the extrusion in the horizontal direction, under the same circumstances of deflection, for example the deflection is 30mm, the extrusion force that can bear can promote 10% ~ 20%.

4. The utility model discloses a material of end cover is the aluminum alloy, adopts the high pressure casting shaping, easily batch production.

5. The utility model discloses a both ends of module main part have the reference column, and the reference column uses hot melt technology to press into such as circular shape, and the reference column passes the mounting hole and the end cover is connected as an organic wholely, makes things convenient for the battery module to transport to the welding station.

6. The utility model discloses an arbitrary end cover is run through to exhaust hole level, thereby gas is discharged from a side end cover when structurally controlling electric core thermal runaway, when battery module arranges into the box, the end cover that will have the exhaust hole is close to the box, reduce the influence to other battery modules after the gas outgoing, the exhaust hole is in the upper end of first recess, the diameter in exhaust hole is between 16mm ~ 30mm, the quantity in exhaust hole is 3 ~ 8, the diameter in exhaust hole and quantity can change according to the displacement when electric core thermal runaway, the exhaust hole is equivalent to exhaust passage, can be with the gas outgoing that produces when electric core thermal runaway, delay the time that electric core complete out of control, strive for the time of fleing for the passenger.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of a power battery module with end caps according to the present invention;

fig. 2 is a schematic front view of an end cap of a power battery module with an end cap according to the present invention;

fig. 3 is a schematic back view of an end cap of a power battery module with an end cap according to the present invention;

fig. 4 is a schematic view of a module main body of the power battery module with end caps according to the present invention.

Reference numerals:

1. an end cap; 2. a module main body; 3. a fire barrier layer; 11. an end cap body; 12. positioning blocks; 13. hoisting the blocks; 14. a first groove; 15. mounting holes; 16. reinforcing ribs; 17. a second groove; 18. an exhaust hole; 19. a third groove; 21. a positioning column; 22. a first protrusion; 23. a second protrusion.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being 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", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-4, the utility model relates to a power battery module with end cap, which belongs to the technical field of power battery, comprising an end cap 1, wherein the end cap 1 comprises an end cap main body 11, a positioning block 12 and a hoisting block 13, the positioning block 12 is arranged at both sides of the end cap main body 11, the positioning block 12 is connected with a battery box body, and plays a role of fixing the battery module, the positioning block 12 and the module main body 2 jointly protect the battery cell to avoid the battery cell from physical impacts such as collision and impact, and prevent the physical damage of external factors or other structures forming the battery cell assembly to the battery cell in the battery module under various operating environments, and avoid causing the performance deterioration or stability reduction of the battery, and the support battery module is stable, so that the overall structural strength and rigidity of the battery module are adapted to various working conditions of automobile running, the hoisting block 13 is arranged at the upper end of the end cap main body 11, and the end cap main body 11 is provided with a first groove 14 and a mounting hole 15 which runs horizontally, the first groove 14 is used for hoisting the whole battery module.

Preferably, there are two hoisting blocks 13, and two hoisting blocks 13 are symmetrically arranged and on the same plane, so that hoisting options are increased to adapt to different hoisting modes.

Preferably, the reinforcing rib 16 is connected with the back of the end cover main body 11, one end of the reinforcing rib 16 is connected with the back of the first groove 14, the other end of the reinforcing rib 16 is connected with the back of the positioning block 12, the reinforcing rib 16 can enhance the strength of the end cover 1, and when the end cover 1 is pressed in the horizontal direction, the bearable pressing force can be increased by 10% -20% under the condition that the deformation is the same, for example, the deformation is 30 mm.

Preferably, the fireproof layer 3 covers the back of the end cover 1, the fireproof layer 3 is made of an intumescent fireproof coating, including but not limited to a flame retardant mainly containing nitrogen and phosphorus, and has the characteristics of fine particle size, narrow particle size distribution range, easy dispersion and the like, the thickness of the fireproof layer 3 is between 0.1mm and 2mm, the fireproof layer 3 can be set to have different thicknesses according to factors such as the type of an electric core, the severe reaction condition and the like, the fireproof layer 3 expands and foams when being burned by fire to form a carbonaceous foam heat-insulating layer to seal a protected object, the transfer of heat and a base material is delayed, the ignition and combustion of the object or the strength reduction caused by the temperature rise is prevented, the fireproof layer 3 absorbs heat to generate an expansion reaction, the transfer of heat and the end cover 1 is delayed, the strength reduction of the end cover 1 caused by the ignition and combustion of a single electric core is prevented, and the safety of the whole module system is guaranteed.

Preferably, the end cover 1 is made of aluminum alloy, is formed by high-pressure casting and is easy to produce in batches.

Preferably, end cover 1 has two, the both sides at module main part 2 are installed to two end cover 1 symmetries, end cover 1 plays the fixed action to battery module, it is stable to support battery module jointly, make the holistic structural strength of battery module and each operating mode that rigidity adaptation car went, there is reference column 21 at the both ends of module main part 2, reference column 21 uses hot melt technology to press into such as circular shape, reference column 21 passes mounting hole 15 and end cover 1 and connects as an organic wholely, make things convenient for battery module to transport to the welding station, there is second recess 17 at the back of end cover 1, there is first arch 22 in the both sides of module main part 2, first arch 22 inlays to be established in second recess 17.

Preferably, the back of the positioning block 12 is provided with a third groove 19, the two sides of the module main body 2 are provided with second protrusions 23, and the second protrusions 23 are embedded in the third groove 19, so that the position of the end cover 1 on the module main body 2 is limited, and the strength of the battery module in the vertical direction is improved.

Preferably, the exhaust hole 18 level runs through any one end cover 1, thereby it is gaseous from one side end cover 1 discharge when structurally controlling electric core thermal runaway, when battery module arranges into the battery box, the end cover 1 that will have the exhaust hole 18 is close to the battery box, reduce the influence to other battery modules after the gas is discharged, the exhaust hole 18 is in the upper end of first recess 14, the diameter of exhaust hole 18 is between 16mm ~ 30mm, the quantity of exhaust hole 18 is 3 ~ 8, the diameter and the quantity of exhaust hole 18 can change according to the displacement when electric core thermal runaway, exhaust hole 18 is equivalent to exhaust passage, can discharge the gas that produces when electric core thermal runaway, delay electric core complete runaway's time, strive for the time of fleing for the passenger.

In the actual working process, put into module main part 2 with electric core in, end cover 1 installs the both ends at module main part 2, and end cover 1 and module main part 2 constitute the battery module, and when needing the assembly, with battery module integral hoisting to the battery box in, will have the end cover 1 of exhaust hole 18 to be close to the battery box, locating piece 12 and battery box connect and fix together, accomplish the fixed of battery module in the battery box.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (8)

1. Take power battery module of end cover, its characterized in that: the end cover comprises an end cover body, positioning blocks and hoisting blocks, wherein the positioning blocks are arranged on two sides of the end cover body, the hoisting blocks are arranged at the upper end of the end cover body, and a first groove and a horizontally-penetrating mounting hole are formed in the end cover body.

2. The end-capped power battery module as recited in claim 1, wherein: the hoisting blocks are arranged symmetrically and on the same plane.

3. The end-capped power battery module as recited in claim 1, wherein: still include the strengthening rib, the back connection of strengthening rib and end cover main part, the one end of strengthening rib and the back connection of first recess, the other end of strengthening rib and the back connection of locating piece.

4. The end-capped power battery module as recited in claim 1, wherein: the fireproof cover is covered on the back face of the end cover, and the thickness of the fireproof layer is 0.1-2 mm.

5. The end-capped power battery module as recited in claim 1, wherein: the end cover is made of aluminum alloy.

6. The power battery module with the end cover as claimed in any one of claims 1 to 5, wherein: the end covers are symmetrically arranged on two sides of the module main body, positioning columns are arranged at two ends of the module main body, the positioning columns penetrate through the mounting holes to be connected with the end covers, a second groove is formed in the back face of each end cover, first bulges are arranged on two sides of the module main body, and the first bulges are embedded in the second groove.

7. The power battery module with the end cover as claimed in claim 6, wherein: the back of the positioning block is provided with a third groove, and two sides of the module main body are provided with second bulges which are embedded in the third groove.

8. The end capped power battery module as recited in claim 7, wherein: still include the exhaust hole, the exhaust hole level runs through arbitrary end cover, and the exhaust hole is in the upper end of first recess, and the diameter in exhaust hole is between 16mm ~ 30mm, and the quantity in exhaust hole is 3 ~ 8.

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