Lithium battery pack capable of preventing needling

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to an anti-needling lithium battery pack, which comprises an outer shell (1), a bottom shell (2) arranged at the bottom of the outer shell, a plurality of groups of battery cells (3) arranged in the outer shell, and an insulating partition plate (4) arranged between adjacent battery cells and used for isolating direct contact between the battery cells, anti-puncture protection plates (5) are arranged on all surfaces of a whole formed by the plurality of groups of battery cells; according to the utility model, multiple isolation protection measures such as the adoption of the soft package polymer lithium ion battery core, the arrangement of the insulating partition plate and the protection plate and the adoption of the aluminum alloy shell are adopted, so that the anti-needling capability and the overall safety performance of the lithium battery pack are effectively improved; and a heat dissipation measure is adopted, so that stable performance output of the battery pack in a long-time use process is ensured, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, in particular to a lithium battery pack that can prevent needle puncture and has an isolation protection structure. Background Art

[0002] With the rapid development of the new energy industry, lithium batteries, as important energy storage components, have been widely used in fields such as electric vehicles and portable electronic devices. However, due to the active chemical properties of lithium batteries, if they are punctured by external sharp objects, it is extremely easy to cause safety problems such as short circuits, liquid leakage, and even explosions. Traditional lithium battery packs have deficiencies in preventing needle puncture and are difficult to meet the requirements of high safety performance. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a lithium battery pack that can prevent needle puncture. By adopting a soft-pack polymer lithium-ion battery cell, multiple isolation protection measures, and an aluminum alloy shell, the safety performance of the lithium battery pack is effectively improved.

[0004] The technical solution is: a lithium battery pack that can prevent needle puncture, including a shell, a bottom shell provided at the bottom thereof, and a plurality of groups of battery cells provided in the shell. An insulating partition is provided between adjacent battery cells to isolate direct contact between the battery cells; a puncture-proof protection plate is provided on each surface of the whole formed by the plurality of groups of battery cells.

[0005] Preferably, a heat dissipation hole communicating with the inside of the shell is provided in one end plate of the shell (1), and an explosion-proof valve is provided on the battery cell, and the explosion-proof valve communicates with the heat dissipation hole.

[0006] Preferably, the shell and the bottom shell are both made of aluminum alloy; the battery cell adopts a soft-pack polymer lithium-ion battery cell.

[0007] Preferably, a power indicator assembly is further provided on the end plate of the shell provided with the heat dissipation hole.

[0008] Preferably, a square frame body integrally formed with the shell is provided on the upper surface of the shell; a locking member is provided on each of the two end plates of the shell.

[0009] Preferably, each locking member includes a locking hook.

[0010] Preferably, a wiring seat is provided at one corner in the square frame body. Three mounting holes are provided in the wiring seat, and a wiring terminal is provided in each mounting hole.

[0011] Preferably, the power indicator assembly includes an LED circuit board disposed in a sunken hole within the end plate, a button disposed on the LED circuit board, and a plurality of light guide columns arranged in a straight line. A nameplate is disposed in the sunken hole for enclosing the circuit board within the sunken hole. The nameplate is provided with light guide through holes for the plurality of light guide columns to expose, and a button cap in contact with the button is further provided on the nameplate.

[0012] Preferably, a charging jack is further provided within the end plate, and a removable dust cap is provided within the charging jack.

[0013] Technical effects: For the lithium battery pack of the present utility model, by adopting a soft-pack polymer lithium-ion battery cell, setting up multiple isolation and protection measures such as an insulating partition and a protective plate, and using an aluminum alloy shell, the puncture resistance and overall safety performance of the lithium battery pack are effectively improved; by adopting heat dissipation measures, it is ensured that the battery pack maintains stable performance output during long-term use, and the service life is extended. Description of the Drawings

[0014] Figure 1 is a perspective view of an embodiment of the present utility model;

[0015] Figure 2 is a perspective view of another angle of an embodiment of the present utility model;

[0016] Figure 3 is an exploded view of an embodiment of the present utility model.

[0017] Reference numerals: housing - 1, sunken hole - 101, charging jack - 102, bottom case - 2, battery cell - 3, insulating partition - 4, protective plate - 5, power indicator assembly - 6, LED circuit board - 601, button - 602, light guide column - 603, nameplate - 604, light guide through hole - 604a, button cap - 604b, square frame - 7, locking member - 8, locking hook - 801, heat dissipation hole - 9, wiring terminal - 10, dust cap - 11, wiring seat - 12, mounting hole - 1201. Detailed Embodiments

[0018] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0019] As Figures 1-3 shown, an embodiment of the present utility model provides a puncture-proof lithium battery pack, including a housing 1, a bottom case 2 disposed at its bottom, a plurality of groups of battery cells 3 disposed within the housing, and an insulating partition 4 disposed between adjacent battery cells for isolating direct contact between the battery cells; a puncture-proof protective plate 5 is disposed on each surface of the whole formed by the plurality of groups of battery cells.

[0020] As Figure 3As shown, in this embodiment, a soft-pack polymer lithium-ion battery cell is used as the energy storage element. Several groups of battery cells 3 form a battery pack with a high energy density through precise series and parallel combinations. That is, the battery pack here is an integral whole. To prevent the penetration of sharp objects, a high-strength and high-toughness protective plate 5 is wrapped around the outer surface of the whole. The protective plate 5 is made of special alloy materials or composite materials and can effectively resist the penetration of sharp objects. Since the battery pack has multiple surfaces, the protective plate 5 consists of multiple pieces, and the size of each piece may not be the same.

[0021] As Figure 3 shown, one end plate of the outer shell 1 is provided with heat dissipation holes 9 communicating with the inside of the outer shell. An explosion-proof valve (not shown) is provided on the battery cell 3, and the explosion-proof valve communicates with the heat dissipation holes; the explosion-proof valve here is installed at the heat dissipation holes 9. When the internal pressure of the battery cell rises abnormally, the explosion-proof valve automatically opens to release the pressure. At the same time, the high-temperature gas is quickly discharged through the heat dissipation channel to avoid heat accumulation causing an explosion.

[0022] Specifically, in this embodiment, both the outer shell 1 and the bottom shell 2 are made of aluminum alloy. Thus, the outer shell 1 and the bottom shell 2 have excellent mechanical strength and corrosion resistance. The aluminum alloy outer shell can not only effectively protect the internal battery cells from external impacts and corrosion but also, to a certain extent, resist the piercing of sharp objects and improve the overall safety performance. The surface of the outer shell 1 is specially treated, such as anodizing, which is beneficial to improving wear resistance and aesthetics.

[0023] As Figures 1-2 shown, a power indicator assembly 6 is also provided on the end plate of the outer shell 1 where the heat dissipation holes are provided.

[0024] As Figure 1 shown, a square frame 7 integrally formed with the upper surface of the outer shell 1 is provided on the upper surface of the outer shell 1; a locking member 8 is provided on each of the two end plates of the outer shell. Each locking member 8 includes a locking hook 801; it is used to tightly connect the battery in this embodiment with the device using the battery.

[0025] In order to be electrically connected to an external device, a wiring seat 12 is provided at one of the corners inside the square frame 7. Three mounting holes 1201 are provided in the wiring seat, and a wiring terminal 10 is provided in each mounting hole to realize the conduction between the battery and the device.

[0026] Furthermore, in order to indicate the battery level, the power indicator assembly 6 includes an LED circuit board 601 provided in a sunken hole 101 inside the end plate, a button 602 provided on the LED circuit board, and a plurality of light guide columns 603 arranged in a straight line. A nameplate 604 provided in the sunken hole 101 is used to enclose the circuit board in the sunken hole. A light guide through hole 604a for exposing a plurality of light guide columns is provided in the nameplate, and a button cap 604b in contact with the button 602 is also provided on the nameplate.

[0027] To charge the battery, a charging jack 102 is further provided in the end plate, and a removable dust cap 11 is provided in the charging jack.

[0028] The lithium battery pack of the present utility model is applicable to a variety of application scenarios, such as electric vehicles, portable electronic devices and other fields, and has a wide application prospect.

[0029] In the above description, it should be noted that the corresponding terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components; "provided in" should be understood as "installed in, provided in", including fixed installation, movable installation and other installation methods.

[0030] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. The preferred embodiments of the present utility model are given in the drawings, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Any equivalent structure made by using the specification and drawings of the present utility model, directly or indirectly applied in other related technical fields, is similarly within the scope of the patent protection of the present utility model.

Claims

1. A puncture-proof lithium battery pack, comprising a housing (1), a bottom housing (2) arranged at the bottom of the housing, and a plurality of battery cells (3) arranged in the housing, characterized in that: An insulating partition (4) is provided between adjacent battery cells to isolate the battery cells from direct contact; and an anti-puncture protective plate (5) is provided on each surface of a whole formed by a plurality of groups of battery cells.

2. The puncture-proof lithium battery pack according to claim 1, characterized in that: A heat dissipation hole (9) communicating with the interior of the outer shell is provided in one end plate of the outer shell (1) and in the bottom shell (2), and an explosion-proof valve is provided on the battery core (3), the explosion-proof valve being in communication with the heat dissipation hole (9).

3. The puncture-proof lithium battery pack according to claim 1, characterized in that: The outer shell (1) and the bottom shell (2) are both made of aluminum alloy; the battery cell (3) is a soft-pack polymer lithium-ion battery cell.

4. The puncture-proof lithium battery pack according to claim 2, characterized in that: A power indication component (6) is also provided on the end plate of the housing (1) on which the heat dissipation holes are provided.

5. The puncture-proof lithium battery pack according to claim 1, characterized in that: The upper surface of the shell (1) is provided with a square frame (7) formed integrally therewith; and a locking piece (8) is respectively provided on the two end plates of the shell.

6. The puncture-proof lithium battery pack according to claim 5, characterized in that: Each locking member (8) comprises a locking hook (801).

7. The puncture-proof lithium battery pack according to claim 5, characterized in that: A wiring seat (12) is provided at one of the corners of the square frame (7), three mounting holes (1201) are provided in the wiring seat, and a wiring terminal (10) is provided in each mounting hole.

8. The puncture-proof lithium battery pack according to claim 4, characterized in that: The power indicator assembly (6) comprises an LED circuit board (601) arranged in a sink hole (101) in an end plate, a key (602) arranged on the LED circuit board and a plurality of light guide columns (603) arranged in a straight line, and a nameplate (604) arranged in the sink hole (101) for sealing the circuit board in the sink hole, wherein the nameplate is provided with light guide through holes (604a) through which the plurality of light guide columns are exposed, and the nameplate is also provided with a key cap (604b) in contact with the key (602).

9. The puncture-proof lithium battery pack according to claim 8, characterized in that: A charging socket (102) is also provided in the end plate, and a removable dust cap (11) is provided in the charging socket.

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