CN210956746U - Lithium ion battery pack structure - Google Patents

Abstract

The utility model provides a lithium ion battery group structure, include the battery box and be held in the battery box's battery cell, the battery box is inside will through the baffle a plurality of battery inner chambers are cut apart into to the battery box is inside, a plurality of groups are constituteed to battery cell, and each the group battery hold in battery inner chamber, each the top and the bottom of baffle all are provided with an at least through-hole so that communicate between every double-phase adjacent battery inner chamber. The temperature inside the lithium ion battery pack tends to be consistent, and the service performance of the whole lithium ion battery pack is improved.

Description

Lithium ion battery pack structure

[ technical field ] A method for producing a semiconductor device

The utility model relates to a lithium ion battery group technical field especially relates to a lithium ion battery group structure.

[ background of the invention ]

The lithium ion battery has high energy density, capacity 2-3 times that of a nickel-hydrogen battery with the same weight, low self-discharge rate, no memory effect, no toxic substance and the like, and is widely applied to electric equipment such as electric automobiles, electric bicycles, electric airplanes and the like.

In order to achieve the rated voltage required by the electric equipment, the single batteries are required to be connected in series and in parallel to be used in the form of a battery pack. However, under the series-parallel connection working condition of the single batteries, the parameters such as internal resistance, capacitance, voltage, temperature and self-discharge have consistency differences, which greatly affects the working efficiency of the battery pack, especially under extreme charging and discharging conditions such as large current, ultralow temperature and ultrahigh temperature, relatively poor single batteries can be degraded in an accelerated manner, the overall service life of the battery pack is affected, and finally, the reverse polarity of the degraded batteries is easily caused, so that the safety problem is caused.

Particularly, although the working temperature of the lithium ion battery is usually-20 to 60 ℃, the comprehensive performance of the lithium ion battery still has a great relationship with the actual environment temperature, if the environment temperature is too high, the performance and the service life of the lithium ion battery are affected, thermal disturbance is generated, the thermal stability of the battery composition material is damaged, thermal side reaction is caused, and finally the safety problem is caused. If the environmental temperature is too low, the charge and discharge performance of the battery is greatly reduced due to the limitation of inherent factors of the material, such as reduction of molecular motion capability, increase of internal resistance and the like, so that the lithium ion battery cannot normally play a role.

Because the lithium ion battery can generate chemical reaction heat and resistance heat in the charging and discharging processes, especially the lithium ion battery with large monomer capacity and high energy ratio generates more heat when discharging with large current, and the performance of the lithium ion battery is seriously influenced. Therefore, current research on lithium ion batteries is mainly focused on heat dissipation management. However, when the battery pack is used at low temperature, especially when the temperature of the single battery is not uniform, the battery pack also causes poor accelerated degradation of the single battery, reduces the uniformity of the single battery, and affects the service life and safety of the battery pack.

[ Utility model ] content

The utility model provides a can lithium ion battery group structure be used for solving the problem that the difference of lithium ion battery cell leads to the performance to descend when current temperature uses to improve the life-span and the performance of group battery.

In order to achieve the above object, the utility model provides a lithium ion battery group structure, include the battery box and be held in the battery box's battery cell, the battery box is inside will through the baffle a plurality of battery inner chambers are cut apart into to the battery box is inside, a plurality of groups are constituteed to battery cell, and each the group battery hold in battery inner chamber, each the top and the bottom of baffle all are provided with an at least through-hole so that communicate between every double-phase adjacent battery inner chamber.

In an embodiment of the present invention, the partition board is disposed inside the battery box in a criss-cross manner, and divides the inside of the battery box into a plurality of battery cavities.

In an embodiment of the present invention, a gap is provided between each battery cavity and the corresponding battery pack.

In an embodiment of the present invention, each of the plurality of unit batteries of the battery pack has a gap therebetween.

In an embodiment of the present invention, a heat dissipation gap is disposed between every two adjacent battery cavities, and the heat dissipation gap is formed between the two partition plates and is communicated with the outside.

In an embodiment of the present invention, the partition board and the battery box are an integral structure.

In an embodiment of the present invention, the middle of the partition board is provided with a hollow structure formed by a plurality of through holes.

In an embodiment of the present invention, the plurality of battery packs are connected in series or in parallel, and each of the plurality of unit batteries in the battery pack are connected in series or in parallel.

In an embodiment of the present invention, the battery pack includes 8 battery packs, and each battery pack has 2 unit batteries.

In an embodiment of the present invention, the battery pack is detachably mounted on the battery box.

Compared with the prior art, the utility model has the advantages of: this lithium ion battery group structure is cut apart into the form of a plurality of battery inner chambers with the battery box through the baffle to make each battery inner chamber be linked together through the trompil, be favorable to whole lithium ion battery group inside temperature to tend to unanimous, reduce because the problem of monomer lithium ion battery difference, improve whole lithium ion battery group's performance.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a lithium ion battery pack structure according to the present invention.

Fig. 2 is a schematic structural view of the separator according to the above embodiment of the present invention.

[ detailed description ] embodiments

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

In the description of the present invention, it is to be understood that 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. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 and fig. 2, a lithium ion battery pack structure is illustrated, wherein the lithium ion battery pack structure includes a battery box 10 and a single battery 21 accommodated in the battery box 10, the inside of the battery box 10 is divided into a plurality of battery cavities 12 by a partition 11, the single battery 21 forms a plurality of battery packs 20, each battery pack 20 is accommodated in the battery cavity 12, and at least one through hole 13 is formed at the top and the bottom of each partition 11 to allow communication between every two adjacent battery cavities 12, so that the temperature inside the whole lithium ion battery pack tends to be uniform, the problem of difference of the single lithium ion batteries is reduced, and the service performance of the whole lithium ion battery pack is improved.

In an embodiment of the present invention, the partition plates 11 are disposed inside the battery box 10 in a criss-cross manner, so as to divide the inside of the battery box 10 into a plurality of battery cavities 12.

As shown in fig. 1, a gap is provided between each of the battery cavities 12 and its corresponding battery pack 20; or a plurality of unit cells 21 of each of the battery packs 20 have gaps therebetween.

As shown in fig. 1, a heat dissipation gap 30 is disposed between every two adjacent battery cavities 12, and the heat dissipation gap 30 is formed between the two partition plates 11 and is communicated with the outside. It is worth mentioning that the separator 11 and the battery case 10 are of an integral structure.

As shown in fig. 2, the structure of a single partition board is illustrated, wherein a hollow structure formed by a plurality of through holes 13 is arranged in the middle of the partition board 11.

As shown in fig. 1, a plurality of the battery packs 20 are connected in series or in parallel, and a plurality of the unit cells 21 in each of the battery packs 20 are connected in series or in parallel. Further, the lithium ion battery pack structure includes 8 battery packs 20, each having 2 unit cells 21. In addition, the battery pack 20 is detachably mounted to the battery case 10.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims (10)

1. The utility model provides a lithium ion battery group structure, includes the battery box and is held in the battery box's battery cell, its characterized in that, the battery box is inside will through the baffle battery box is inside to be cut apart into a plurality of battery inner chambers, battery cell constitutes a plurality of groups of battery, and each the group of battery holds in battery inner chamber, at each the top and the bottom of baffle all are provided with at least a through-hole so that communicate between every two adjacent battery inner chambers.

2. The lithium ion battery pack structure of claim 1, wherein the partitions are disposed inside the battery box in a criss-cross manner to divide the inside of the battery box into a plurality of battery cavities.

3. The lithium ion battery pack structure of claim 2, wherein a gap is provided between each of said cell cavities and its corresponding battery pack.

4. The lithium ion battery structure of claim 2, wherein a plurality of cells of each of said batteries have gaps therebetween.

5. The lithium ion battery pack structure of claim 3, wherein a heat dissipation gap is formed between every two adjacent battery cavities, and the heat dissipation gap is formed between the two separators and is communicated with the outside.

6. The lithium ion battery pack structure of claim 5, wherein said separator and said battery can are of unitary construction.

7. The lithium ion battery pack structure of claim 1, wherein a hollow structure formed by a plurality of through holes is formed in the middle of the separator.

8. The lithium ion battery structure of claim 1, wherein a plurality of said battery packs are connected in series or in parallel, and a plurality of said cells in each of said battery packs are connected in series or in parallel.

9. The lithium ion battery pack structure of claim 8, comprising 8 of said battery packs, each of said battery packs having 2 of said cells.

10. The lithium ion battery pack structure of claim 1, wherein said battery pack is removably mounted to said battery housing.

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