CN217641629U - High-energy density battery pack - Google Patents

Abstract

The utility model provides a high energy density battery package, includes the shell and installs at its inside battery module, be provided with the installation roof beam that first fixed beam and second fixed beam are constituteed in the shell, rectangular distribution arranges has a plurality of first electric cores in the die cavity that the installation roof beam formed, install second electricity core in the clearance of first electricity core side, form the large capacity return circuit through the busbar connection between the first electricity core, constitute the low capacity return circuit after connecting through the busbar between the second electricity core, the parallelly connected battery module that forms in large capacity return circuit and low capacity return circuit. The utility model has the advantages of being scientific and reasonable in structural design, make full use of the intrinsic space size of battery package Pack, improved battery package capacity, reached the effect that improves battery package energy density, tentatively estimate every degree electric energy lifting energy 7.7%, have very strong practicality to this kind of large energy battery package of passenger car, improved continuation of the journey mileage greatly.

Description

High-energy density battery pack

Technical Field

The utility model relates to a battery package manufacturing technical field, in particular to high energy density battery package.

Background

The current endurance mileage of the electric automobile restricts the popularization and the development of the electric automobile, and the battery pack with high energy density can realize longer endurance mileage. The requirement of the electric passenger vehicle and the electric special vehicle on the one-time charging endurance mileage is higher and higher, and a battery pack with high energy density is needed to be made before the endurance mileage is increased before the current battery technology is broken through qualitatively.

At present, when a battery Pack is integrally arranged in a new generation of battery cells with a trend of large cylinders 4680, a space area with the diameter of about 19mm is formed between every four adjacent battery cells, so that space waste is caused, and the energy density of the battery Pack is reduced. To this end, we propose a high energy density battery pack.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high energy density battery package inlays the second electric core of 18800 of arranging in the middle blank region that 4680 electric core was arranged, has utilized the inherent space size of battery package Pack, has improved battery package capacity, has reached the effect that improves battery package energy density.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a high energy density battery package, includes the shell and installs at its inside battery module, be provided with the installation roof beam that first fixed beam and second fixed beam are constituteed in the shell, rectangular distribution arranges has a plurality of first electric cores in the die cavity that the installation roof beam formed, install second electricity core in the clearance of first electricity core side, form the large capacity return circuit through the busbar connection between the first electricity core, constitute the low capacity return circuit after connecting through the busbar between the second electricity core, the parallelly connected battery module that forms in large capacity return circuit and low capacity return circuit.

Further, the shell comprises an upper shell and a lower shell, and the convex edge at the bottom of the upper shell is inserted into the lower shell.

Furthermore, the side surfaces of the upper shell and the lower shell are respectively provided with a connecting plate, and the connecting plates are provided with positioning holes.

Furthermore, the top of the upper shell is provided with a heat dissipation groove.

Further, the first cell is a 4680 cell, and the second cell is a 18800 cell.

Further, the battery module comprises fifteen first battery cells and eight second battery cells.

Further, the battery module is installed at the support frame upside, the heat-conducting plate is installed to the support frame inboard, the heat-conducting plate top is provided with the silica gel piece.

Furthermore, a pressing plate provided with a through hole is arranged in the upper shell, and a spring is arranged on the upper side of the pressing plate.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The high-energy-density battery pack is simple and reasonable in structural design and high in practicability, the battery pack shell is formed by the upper shell and the lower shell which are convenient to disassemble, and a battery module can be stably supported under the matching of the first fixing beam and the second fixing beam in the battery pack shell;

(2) In the aspect of the battery cell: the 18650 electrical core specification is taken as the benchmark, combine the height of 4680 electrical core, design a size specification cylindrical electrical core of 18800, and 4680 share the chemical system, it is convenient to produce, the process is mature;

(3) Pack arrangement: in the middle blank area of the 4680 battery cell, a second battery cell of 18800 is embedded and arranged to form a single low-capacity loop, and the low-capacity loop is connected in parallel with the high-capacity loop formed by the 4680 battery cell, so that the electric quantity is improved;

(4) The device fully utilizes the inherent space size of the Pack of the battery Pack, improves the capacity of the battery Pack, achieves the effect of improving the energy density of the battery Pack, preliminarily estimates the energy increase of each degree of electric energy by 7.7 percent, has strong practicability for a large-energy battery Pack of a passenger vehicle and greatly improves the endurance mileage;

through setting up heat-conducting plate and silica gel piece, can make things convenient for the inside heat of battery module to discharge when supporting the battery module, effectively improve the even heat transfer effect of electric core, reduce between the battery to conduct heat not in order smooth electric core adverse reaction and the thermal management that leads to consume energy scheduling problem.

Drawings

The invention is further described below with reference to the following figures and examples:

fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the battery module of the present invention.

Fig. 3 is a schematic view of the internal structure of the lower housing of the present invention.

Fig. 4 is a schematic view of the internal structure of the upper housing of the present invention.

In the figure: the battery comprises a shell 1, an upper shell 11, a lower shell 12, a connecting plate 13, positioning holes 14, heat dissipation grooves 15, a convex edge 16, a first fixing beam 17, a second fixing beam 18, a die cavity 19, a first battery cell 2, a second battery cell 21, conductive strips 22, a support frame 23, a heat conducting plate 24, a silica gel sheet 25, a pressing plate 26, through holes 27 and springs 28.

Detailed Description

This section will describe in detail the embodiments of the present invention, the preferred embodiments of which are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can visually and vividly understand each technical feature and the whole technical solution of the present invention, but it cannot be understood as a limitation to the scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a high energy density battery package, includes shell 1 and installs at its inside battery module, be provided with the installation roof beam that first fixed beam 17 and second fixed beam 18 are constituteed in the shell 1, it has a plurality of first electric cores 2 to be rectangular distribution arrangement in the die cavity 19 that forms in the installation roof beam, install second electric core 21 in the clearance of 2 sides of first electric core, connect through busbar 22 between the first electric core 2 and form the large capacity return circuit, form the low capacity return circuit after connecting through busbar 22 between the second electric core 21, the large capacity return circuit connects in parallel with the low capacity return circuit and forms the battery module.

In the aspect of the battery cell: the 18650 electrical core specification is taken as the benchmark, combine the height of 4680 electrical core, design a size specification cylindrical electrical core of 18800, with 4680 electrical core sharing the chemical system, it is convenient to produce, the process is mature; pack arrangement: in the middle blank area of the 4680 battery cell arrangement, a second battery cell 21 of 18800 is embedded and arranged; form solitary low capacity return circuit all the way, carry out parallelly connected setting with the large capacity return circuit that 4680 electricity core formed to this improves the electric quantity, and this device make full use of the intrinsic space size of battery package Pack has improved battery package capacity, has reached the effect that improves battery package energy density, and every degree electric energy of preliminary estimation promotes energy 7.7%, has very strong practicality to this kind of large energy battery package of passenger car, has improved continuation of the journey mileage greatly.

The shell 1 comprises an upper shell 11 and a lower shell 12, a convex edge 16 at the bottom of the upper shell 11 is inserted into the lower shell 12, the upper shell 11 and the lower shell 12 which are convenient to disassemble and assemble are arranged to form the battery pack shell 1, and the battery module can be stably supported under the matching of an internal first fixed beam 17 and a second fixed beam 18.

The side surfaces of the upper shell 11 and the lower shell 12 are respectively provided with a connecting plate 13, the connecting plates 13 are provided with a positioning hole 14, and when the fixing device is used, the upper connecting plate 13 and the lower connecting plate 13 are fixed through the matching of bolts and the positioning holes 14.

The top of the upper shell 11 is provided with a heat dissipation groove 15, the heat dissipation groove 15 is distributed on the top of the upper shell 11 in a rectangular shape, and heat generated inside the shell 1 can be discharged through the heat dissipation groove 15, so that the heat dissipation effect of the battery cell is improved.

The first battery cell 2 is a 4680 battery cell, the second battery cell 21 is a 18800 battery cell, and through production tests, the specification of the 4680 battery cell is 3.7V,25Ah, and the specification of the 18800 battery cell is 3.7V,5Ah as examples;

the energy of one 4680 cell is 3.7 × 25=92.5wh;

calculate the percentage of energy boost as 1.4 kwh;

the battery module includes fifteen first cells 2 and eight second cells 21.

Wherein, 15 × 3.7 × 25=1387.5wh;

8*3.7*5＝148wh；

thus, 148/1387.5=10.6%;

according to the above analysis, 10.6%/1.387=7.7% per watt of electricity;

the energy increase of each degree of electric energy is estimated by 7.7% preliminarily through the calculation, the inherent space size of the Pack is fully utilized, the capacity of the Pack is improved, and the effect of improving the energy density of the Pack is achieved.

The battery module is installed at support frame 23 upside, heat-conducting plate 24 is installed to support frame 23 inboard, heat-conducting plate 24 top is provided with silica gel piece 25, through setting up heat-conducting plate 24 and silica gel piece 25, can make things convenient for the inside heat of battery module to discharge when supporting the battery module, has effectively improved the even heat transfer effect of electric core, reduces to transmit between the battery not smooth electric core adverse reaction and the thermal management high grade problem that leads to.

The upper shell 11 is internally provided with a pressing plate 26 provided with a through hole 27, the upper side of the pressing plate 26 is provided with a spring 28, and under the elastic force action of the spring 28, the pressing plate 26 presses the battery cell from the top, so that the fixing effect of the device on the battery cell is ensured.

The working principle is as follows:

the high-energy-density battery Pack adopts the fifteen first battery cells 2 and the eight second battery cells 21 to form the battery module, the battery module is arranged in the shell 1, the inherent space size of the Pack of the battery Pack is fully utilized, and the second battery cells 21 are embedded and distributed in the middle blank area arranged on the 4680 battery cells; eight second electricity cores form an individual low capacity return circuit all the way, connect in parallel with the large capacity return circuit that fifteen 4680 electricity cores formed and constitute the battery module to this improves the electric quantity, and electricity core and heat-conducting plate 24 closely laminate through middle silica gel piece 25, and the heat that electricity core produced passes through silica gel piece 25 and transmits for heat-conducting plate 24, guarantees that electricity core can carry out even heat transfer with the heat-conducting plate.

This device make full use of the intrinsic space size of battery package Pack, improved battery package capacity, reached the effect that improves battery package energy density, tentatively estimate every degree electric energy lifting energy 7.7%, have very strong practicality to this kind of high-energy battery package of passenger car, improved continuation of the journey mileage greatly.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (8)

1. The utility model provides a high energy density battery package, includes shell (1) and installs at its inside battery module, its characterized in that: the battery module is characterized in that a mounting beam composed of a first fixing beam (17) and a second fixing beam (18) is arranged in the shell (1), a plurality of first battery cells (2) are arranged in a rectangular distribution mode in a die cavity (19) formed in the mounting beam, second battery cells (21) are installed in gaps on the side faces of the first battery cells (2), the first battery cells (2) are connected through bus bars (22) to form a large-capacity loop, the second battery cells (21) are connected through the bus bars (22) to form a small-capacity loop, and the large-capacity loop and the small-capacity loop are connected in parallel to form the battery module.

2. The high energy density battery pack of claim 1, wherein: the shell (1) comprises an upper shell (11) and a lower shell (12), and a convex edge (16) at the bottom of the upper shell (11) is inserted into the lower shell (12).

3. The high energy density battery pack of claim 2, wherein: the side surfaces of the upper shell (11) and the lower shell (12) are respectively provided with a connecting plate (13), and the connecting plates (13) are provided with positioning holes (14).

4. The high energy density battery pack of claim 2, wherein: the top of the upper shell (11) is provided with a heat dissipation groove (15).

5. The high energy density battery pack of claim 1, wherein: the first electrical core (2) is a 4680 electrical core, and the second electrical core (21) is a 18800 electrical core.

6. The high energy density battery pack of claim 1, wherein: the battery module comprises fifteen first battery cells (2) and eight second battery cells (21).

7. The high energy density battery pack of claim 1, wherein: the battery module is installed at support frame (23) upside, heat-conducting plate (24) are installed to support frame (23) inboard, heat-conducting plate (24) top is provided with silica gel piece (25).

8. The high energy density battery pack of claim 2, wherein: a pressing plate (26) provided with a through hole (27) is arranged in the upper shell (11), and a spring (28) is arranged on the upper side of the pressing plate (26).

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