CN218602551U

CN218602551U - Battery pack

Info

Publication number: CN218602551U
Application number: CN202223012408.XU
Authority: CN
Inventors: 席鹏飞; 许飞; 杨随团; 买超杰; 王震; 王昌权; 余淮海; 徐良安; 李鹏; 李楠楠; 马克文; 赵怀普
Original assignee: Multi Fluorine New Energy Technology Co ltd
Current assignee: Multi Fluorine New Energy Technology Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-03-10
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses a battery pack, which comprises a box body with a hollow structure, wherein a battery pack is fixedly connected in the box body, the battery pack comprises a heat conducting plate, a fixed support and an insulating cover, the heat conducting plate is fixedly connected on the inner bottom surface of the box body, the fixed support is fixedly connected on the upper surface of the heat conducting plate, and the insulating cover is fixedly connected above the fixed support; the fixing support is provided with a plurality of battery accommodating grooves, the battery accommodating grooves penetrate through the fixing support, and the inner wall of each battery accommodating groove is provided with a plurality of ribs; the utility model transmits the heat of the battery to the heat conducting plate through the heat conducting structural adhesive, realizes axial heat conduction through the heat conducting plate, and has the advantages of simple structure, high heat conducting efficiency and simple process compared with a coiled pipe heat conducting scheme; the utility model discloses overall structure adopts the design of no mould group scheme, simple structure, greatly reduced spare part quantity, the cost is lower.

Description

Battery pack

Technical Field

The utility model relates to a battery technology field specifically is a battery package.

Background

The lithium ion battery has the advantages of light weight, large energy storage, large power, no pollution, long service life, small self-discharge coefficient, wide temperature application range and the like, is gradually favored by people, and gradually replaces other traditional batteries in the field of energy storage and power batteries.

The cylindrical lithium battery has the characteristics of high production efficiency, low production cost, good product consistency and the like, the anode and the cathode of the traditional cylindrical lithium battery are respectively positioned on two end surfaces of the battery, explosion-proof valves are uniformly distributed on the anode and the cathode in the grouping process, and when the cylindrical lithium battery is out of control due to contact heating, thermal diffusion is easily caused, so that the whole package is out of control; at present, the cylindrical lithium battery is mainly used for heat management by closely attaching a serpentine pipe to the cylindrical surface of a cylindrical battery for heat conduction, when the diameter of the cylindrical lithium battery is large enough, for example, 46mm or even 60mm is achieved, the heat conduction efficiency of the cylindrical surface of the cylindrical battery is far lower than that of the axial end face, so if the serpentine pipe is still used for heat conduction, the heat conduction efficiency is seriously insufficient; although the cylindrical lithium battery is high in production efficiency and good in product consistency, the traditional module grouping scheme needs fixing supports to distribute and fix two ends of the cylindrical lithium battery, the structure is complex, the grouping efficiency is low, and therefore the grouping scheme which is good in safety, high in heat conduction efficiency, simple in structure and low in cost is particularly important.

Disclosure of Invention

The utility model aims at providing a battery package to solve among the prior art battery package structure complicacy, the not high problem of heat conduction efficiency.

In order to realize the purpose, the technical scheme of the utility model is that:

a battery pack comprises a box body with a hollow structure, wherein a battery pack is fixedly connected in the box body, the battery pack comprises a heat conducting plate, a fixing support and an insulating cover, the heat conducting plate is fixedly connected to the bottom surface of the inner side of the box body, the fixing support is fixedly connected to the upper surface of the heat conducting plate, and the insulating cover is fixedly connected to the upper side of the fixing support;

a plurality of battery holding tanks have been seted up on the fixed bolster, the battery holding tank runs through the fixed bolster, be provided with a plurality of ribs on the inner wall of battery holding tank.

In some embodiments, the fixing bracket is provided with a plurality of first fixing holes, the top surface of the heat conducting plate is fixedly connected with first fixing columns, and the first fixing columns extend into the first fixing holes.

Through mutually supporting with the first fixed orifices on the fixed bolster and the first fixed column on the heat-conducting plate, fix the fixed bolster on the heat-conducting plate, then place the battery in the battery holding tank, the rib plays fixed and the effect of location, then realizes establishing ties or parallelly connected of battery through the run-on, realizes the collection to the voltage of battery and temperature signal through the signal acquisition subassembly.

In some embodiments, the fixing bracket is further provided with a plurality of second fixing holes, the fixing rod is fixedly connected in the second fixing holes, a heat conducting structural adhesive is filled between the inner wall of the second fixing hole and the outer wall of the fixing rod, the top of the fixing rod is provided with a connecting hole, the bottom surface of the insulating cover is fixedly connected with a second fixing column, and the second fixing column extends into the connecting hole.

Through the cooperation of second fixed column and second fixed orifices, realize fixing the top at the battery with insulating lid, and then realize the withstand voltage's of insulation effect, the heat conduction structure who fills between the inner wall of second fixed orifices and the outer wall of dead lever glues the radiating efficiency that can improve the battery.

In some embodiments, the box body comprises an upper box body and a lower box body, the upper box body and the lower box body are fixedly connected, a fixing groove is formed in the bottom surface of the inner side of the lower box body, and the heat conducting plate is fixedly connected in the fixing groove.

In some embodiments, the height of the top surface of the heat conductive plate is not higher than the height of the inner bottom surface of the lower case.

The fixing groove is formed in the bottom surface of the inner side of the lower box body, and the heat conducting plate is fixedly connected in the fixing groove, so that the overall height of the battery pack can be reduced.

In some embodiments, the box body comprises an upper box body and a lower box body, the upper box body is fixedly connected with the lower box body, the lower box body is integrally formed with the heat conducting plate, the bottom surface of the inner side of the lower box body is kept flat, and the effect of reducing the overall height of the battery pack can also be achieved.

In some embodiments, the bottom of the inner side of the battery accommodating groove is fixedly connected with a plurality of supporting blocks, and the supporting blocks are uniformly distributed along the inner side wall of the battery accommodating groove.

The supporting shoe can increase the bulk strength of battery holding tank, improves the stability of battery in the battery holding tank.

In some embodiments, after the fixing bracket is fixed on the top surface of the heat conducting plate, the bottom of the battery accommodating groove is filled with heat conducting structural adhesive.

High-efficient heat transfer between battery and the heat-conducting plate can be realized through heat conduction structural adhesive, improves the radiating efficiency of battery.

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

the utility model transmits the heat of the battery to the heat conducting plate through the heat conducting structural adhesive, realizes axial heat conduction through the heat conducting plate, and has the advantages of simple structure, high heat conducting efficiency and simple process compared with a serpentine pipe heat conducting scheme; the utility model discloses overall structure adopts the design of no mould group scheme, simple structure, greatly reduced spare part quantity, the cost is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is an exploded view of the lower case and the heat-conducting plate of the present invention;

fig. 2 is a schematic structural view of the fixing bracket of the present invention;

FIG. 3 is a top view of the battery container of the present invention;

fig. 4 is a three-dimensional structure view of the fixing rod of the present invention;

fig. 5 is a top view structural diagram of the fixing rod of the present invention;

fig. 6 is a schematic connection diagram of the fixing bracket of the present invention;

fig. 7 is a schematic view of the battery of the present invention;

fig. 8 is a schematic connection diagram of the connection row and the signal acquisition assembly of the present invention;

fig. 9 is a schematic view of the installation of the insulating plate of the present invention;

fig. 10 is a front view of the insulating panel of the present invention;

fig. 11 is a schematic connection diagram of the heat-conducting plate of the present invention.

In the figure: 1. a box body; 11. a lower box body; 111. a fixing groove; 21. a heat conducting plate; 211. a first fixed column; 22. a fixed bracket; 221. a battery accommodating groove; 2211. a rib; 2212. a support block; 222. a first fixing hole; 223. a second fixing hole; 224. fixing the rod; 2241. connecting holes; 23. an insulating cover; 3. a battery; 4. a connecting row; 5. and a signal acquisition assembly.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "vertical" is not strictly vertical but is within the tolerance of the error. "parallel" is not strictly parallel but within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by a person skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this application can be understood as appropriate by one of ordinary skill in the art.

In this application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, and the embodiment of the present application is not limited thereto. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separator. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the current collector which is not coated with the positive active substance layer protrudes out of the current collector which is coated with the positive active substance layer, and the current collector which is not coated with the positive active substance layer is laminated to be used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative pole mass flow body and negative pole active substance layer, and the surface of negative pole mass flow body is scribbled to the negative pole active substance layer, and the mass flow body protrusion in the mass flow body of having scribbled the negative pole active substance layer of not scribbling the negative pole active substance layer is as negative pole utmost point ear after the mass flow body of not scribbling the negative pole active substance layer is range upon range of. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the diaphragm can be PP or PE, etc. In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

Example 1:

as shown in figures 1-11 of the drawings,

a battery pack comprises a box body 1 with a hollow structure, wherein a battery pack is fixedly connected in the box body 1 and comprises a heat-conducting plate 21, a fixing support 22 and an insulating cover 23, the heat-conducting plate 21 is fixedly connected to the bottom surface of the inner side of the box body 1, the fixing support 22 is fixedly connected to the upper surface of the heat-conducting plate 21, and the insulating cover 23 is fixedly connected above the fixing support 22;

a plurality of battery holding grooves 221 have been seted up on fixed bolster 22, battery holding groove 221 runs through fixed bolster 22, be provided with a plurality of ribs 2211 on the inner wall of battery holding groove 221.

In this embodiment, the fixing bracket 22 is provided with a plurality of first fixing holes 222, the top surface of the heat conducting plate 21 is fixedly connected with first fixing posts 211, and the first fixing posts 211 extend into the first fixing holes 222.

Mutually support through first fixed orifices 222 with on the fixed bolster 22 and the first fixed column 211 on the heat-conducting plate 21, fix the fixed bolster 22 on the heat-conducting plate 21, then place battery 3 in battery holding tank 221, rib 2211 plays fixed and location's effect, then realize establishing ties or parallelly connected (the bank is connected in order to realize establishing ties or parallelly connected with the utmost point post of battery 3) of battery 3 through the bank of connections 4, realize the collection to the voltage of battery 3 and temperature signal through signal acquisition subassembly 5.

In this embodiment, the fixing bracket 22 is further provided with a plurality of second fixing holes 223, the fixing rod 224 is fixedly connected in the second fixing holes 223, a heat conducting structure glue is filled between an inner wall of the second fixing hole 223 and an outer wall of the fixing rod 224, the top of the fixing rod 224 is provided with a connecting hole 2241, the bottom surface of the insulating cover 23 is fixedly connected with a second fixing column 231, and the second fixing column 231 extends into the connecting hole 2241.

Through the cooperation of second fixed column 231 and connecting hole 2241, realize fixing insulating cover 23 in the top of battery 3, and then realize the withstand voltage's effect, the heat conduction structure who fills between the inner wall of connecting hole 2241 and the outer wall of dead lever 224 glues and can improve the radiating efficiency of battery 3.

In this embodiment, the box body 1 includes an upper box body (not shown in the drawings) and a lower box body 11, the upper box body is fixedly connected with the lower box body 11, a fixing groove 111 is formed on the inner bottom surface of the lower box body 11, and the heat conducting plate 21 is fixedly connected in the fixing groove 111.

In this embodiment, the height of the top surface of the heat conducting plate 23 is not higher than the height of the inner bottom surface of the lower case 11.

The fixing groove 111 is formed on the inner bottom surface of the lower case 11, and the heat conduction plate 23 is fixedly connected in the fixing groove 111, so that the overall height of the battery pack can be reduced.

In this embodiment, a plurality of supporting shoes 2212 of the inboard bottom fixedly connected with of battery holding tank 221, supporting shoe 2212 is along battery holding tank 221 inside wall evenly distributed, has the clearance between the inside supporting shoe 2212 of battery holding tank 211, upwards overflows that heat conduction structure glues when making things convenient for the assembly of cylinder lithium cell.

The supporting block 2212 can increase the overall strength of the battery accommodating groove 221, and improve the stability of the battery 3 in the battery accommodating groove 2212.

In this embodiment, after the fixing bracket 22 is fixed on the top surface of the heat conducting plate 21, the bottom of the battery accommodating groove 221 is filled with a heat conducting glue.

High-efficient heat transfer between battery 3 and heat-conducting plate 21 can be realized through heat conduction structural adhesive, improves battery 3's radiating efficiency.

Example 2:

the difference from embodiment 1 is that the case body comprises an upper case body (not shown in the figure) and a lower case body 11, the upper case body and the lower case body 11 are fixedly connected, the lower case body 11 is integrally formed with the heat conduction plate 21, the inner bottom surface of the lower case body 11 is kept flat, and the effect of reducing the overall height of the battery pack can also be achieved.

Based on the embodiments of the present invention, any modifications, equivalent replacements, improvements, etc. made by other embodiments obtained by a person of ordinary skill in the art without creative efforts shall be included in the protection scope of the present invention.

Claims

1. The utility model provides a battery pack, includes hollow structure's box, fixedly connected with group battery in the box, its characterized in that: the battery pack comprises a heat conducting plate, a fixing support and an insulating cover, the heat conducting plate is fixedly connected to the bottom surface of the inner side of the box body, the fixing support is fixedly connected to the upper surface of the heat conducting plate, and the insulating cover is fixedly connected to the upper portion of the fixing support;

2. The battery pack according to claim 1, wherein: a plurality of first fixing holes are formed in the fixing support, first fixing columns are fixedly connected to the top surface of the heat conducting plate, and the first fixing columns stretch into the first fixing holes.

3. The battery pack according to claim 2, wherein: the fixing support is further provided with a plurality of second fixing holes, fixing rods are fixedly connected in the second fixing holes, heat conduction structure glue is filled between the inner walls of the second fixing holes and the outer walls of the fixing rods, the top of each fixing rod is provided with a connecting hole, a second fixing column is fixedly connected to the bottom surface of the insulating cover, and the second fixing column extends into the connecting holes.

4. The battery pack according to claim 3, wherein: the box includes box, lower box, go up box and lower box fixed connection, the fixed slot has been seted up on the inboard bottom surface of box down, heat-conducting plate fixed connection is in the fixed slot.

5. The battery pack according to claim 4, wherein: the height of the top surface of the heat conducting plate is not higher than that of the bottom surface of the inner side of the lower box body.

6. The battery pack according to claim 3, wherein: the box includes box, lower box, go up box and lower box fixed connection, box and heat-conducting plate integrated into one piece just keep the inboard bottom surface of box down pure flat down.

7. The battery pack according to claim 1, wherein: the bottom of the inner side of the battery accommodating groove is fixedly connected with a plurality of supporting blocks, and the supporting blocks are uniformly distributed along the inner side wall of the battery accommodating groove.

8. The battery pack according to claim 1, wherein: after the fixed support is fixed on the top surface of the heat conducting plate, heat conducting structural adhesive is filled at the bottom of the battery accommodating groove.