CN105789488A - Secondary battery pack with protection function - Google Patents

Abstract

The invention relates to a secondary battery pack with a protection function, which comprises a battery pack, wherein two ends of the battery pack are respectively provided with a conductive part, each conductive part is electrically connected with a lead wire so as to be electrically connected with an external device and supply power to the external device through the lead wires, a shell is internally provided with an accommodating space for accommodating the battery pack, and a protective layer is filled in the shell and covers the battery pack and exposes the lead wires, wherein the protective layer is solid at normal temperature and can be melted into liquid at high temperature, and the protective layer can be used for isolating the battery pack from the external environment, protecting the battery pack and effectively conducting heat. Therefore, the invention can lead the heat energy of the battery pack, absorb the heat energy of the battery pack and isolate the external air by coating the battery pack with the wax film, thereby avoiding the explosion caused by the contact combustion with the oxygen in the air when the temperature of the battery pack is overhigh and protecting the battery pack.

Description

Secondary battery pack with protective function

technical field

The invention relates to a secondary battery pack, in particular to a secondary battery pack with protection function which can isolate the battery pack from the external environment.

Background technique

The so-called secondary battery refers to a battery that can be recharged and reused after the battery's electric energy is consumed. In recent years, due to the development of green energy, many locomotives, automobiles and large-scale machinery no longer use gasoline to start, but instead use electric energy to start. However, locomotives, automobiles or large-scale machinery all require a large amount of power to start. In order to make the secondary battery generate large power, it is necessary to connect multiple secondary batteries in series when using them, and connect the conductive terminals of multiple secondary batteries through conductive sheets. Multiple secondary batteries can be connected in series to form a battery pack to provide greater power.

However, if the battery pack is used in a vehicle or a large machine, the vehicle or large machine may be exposed to the sun or exposed to wind and rain, and the battery pack inside the vehicle or large machine may leak electricity due to moisture. If the vehicle or large machinery is located in a sub-zero temperature environment, it is likely to cause the battery pack to freeze, resulting in the battery pack being unable to generate electricity, or causing leakage, etc. In severe cases, the user may be injured due to battery pack leakage or explosion. Furthermore, the battery pack may generate high temperature due to improper internal discharge. If the heat energy cannot be properly discharged, the battery pack may explode. Therefore, it is very important to protect the battery pack from being damaged by the external environment and to effectively dissipate heat.

In view of this, the present invention proposes a secondary battery pack with a protective function to overcome the above-mentioned problems effectively.

Contents of the invention

The main purpose of the present invention is to provide a secondary battery pack with a protective function, which can absorb the heat energy generated by the battery pack, and guide the heat energy in the battery pack to the outside to avoid excessive temperature of the battery pack, and can isolate External air and moisture prevent the battery pack from getting wet, and in addition, it can also achieve the purpose of antifreezing.

Another object of the present invention is to provide a secondary battery pack with protection function, which has a simple structure, high production efficiency and relatively low production cost.

In order to achieve the above object, the present invention provides a secondary battery pack with a protective function, which includes a battery pack, a conductive part is provided at both ends of the battery pack, and each conductive part is electrically connected to a lead wire, a shell Body, the casing is provided with a housing space to accommodate the battery pack, and a protective layer, the protective layer fills the casing and covers the battery pack and exposes the lead wires, wherein the protective layer is solid at normal temperature and can melt at high temperature It is in a liquid state, and the use of a protective layer can isolate the battery pack from the external environment, protect the battery pack and effectively conduct heat.

The following will be described in detail through specific embodiments, so that it is easier to understand the purpose, technical content, characteristics and effects of the present invention.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is the perspective view of the present invention;

Fig. 3 is the three-dimensional exploded view of the present invention;

Fig. 4 is a perspective view of the battery pack of the present invention.

Description of reference signs: 1-secondary battery pack with protective function; 10-battery pack; 12-conductive part; 14-lead wire; 16-secondary battery; 16'-secondary battery; 16"-secondary battery; 162-conductive terminal; 164-vent valve; 18-conductive sheet; 20-fixing element; 22-first fixing frame; 220-piercing hole; 24-second fixing frame; 30-protective layer; - housing; 42 - accommodating space.

detailed description

Please refer to Fig. 1 and Fig. 2, as shown in the figure, the secondary battery pack 1 with protection function includes a battery pack 10, and two ends of the battery pack 10 are respectively provided with a conductive portion 12, and each conductive portion 12 is electrically connected to A lead wire 14; a housing 40, the housing 40 is provided with an accommodating space 42 for accommodating the battery pack 10; a protective layer 30 fills the housing 40 and covers the battery pack 10, so that the battery pack 10 only exposes the lead wire 14 Outside the protective layer 30 , the battery pack 10 is electrically connected to an external device (not shown in the figure) through the lead wire 14 to supply power to the external device. In this embodiment, the material of the protective layer 30 is wax. Therefore, the protective layer 30 is solid at room temperature, and can be melted into a liquid at high temperature. The protective layer 30 is used to completely cover the battery pack 10, which can isolate the battery pack 10 from the external environment. temperature, to prevent the battery pack 10 from freezing when the external ambient temperature drops below zero degrees Celsius, and using the protective layer 30 to coat the battery pack 10 can also effectively isolate water vapor, prevent the battery pack 10 from being wet, and isolate external gases such as oxygen Such as flammable gas contact with the battery pack 10, to avoid the battery pack 10 when the temperature is too high to contact with oxygen to produce chemical reaction and burn to cause explosion. In addition, since the protective layer 30 will melt into a liquid protective layer 30 when the temperature is between 46°C-90°C, so when the temperature of the battery pack 10 exceeds 46°C-90°C, the protective layer 30 will melt, While melting, it can absorb the heat energy of the battery pack 10 to prevent the temperature of the battery pack 10 from being too high. Of course, when the protective layer 30 melts, it can also continuously isolate the external temperature, water vapor, air, etc., so as to avoid the contact with oxygen when the temperature of the battery pack 10 is too high. Contact produces a chemical reaction which may result in an explosion due to combustion. Furthermore, since the casing 40 is a metal casing, this embodiment is an aluminum casing, and aluminum has high thermal conductivity, so the casing 40 in this embodiment is matched with the protective layer 30, which can effectively dissipate the heat absorbed by the protective layer 30. Heat energy, greatly improving heat conduction efficiency.

Next, please refer to FIG. 2 and FIG. 3 to illustrate how to cover the battery pack 10 with the protective layer 30. As shown in the figure, the battery pack 10 is first put into the accommodating space 42 of the casing 40. The material of the protective layer 30 is a wax film, so when making the secondary battery pack 1 with a protective function, pour the heated and melted wax 30 ′ into the casing 40 to fill the accommodating space 42 of the casing 40 and Cover the battery pack 10 but expose the leads 14 , and finally wait for the wax 30 ′ to cool and solidify to form a wax film, that is, the protective layer 30 to cover the battery pack 10 .

Next, please refer to Fig. 2 and Fig. 4 to illustrate the structure of the battery pack 10 of the present invention. There are two conductive terminals 162, and each secondary battery 16 is also provided with a gas release valve 164 between the two conductive terminals 162, which can release the internal pressure of the secondary battery part 16 to prevent the internal pressure of the secondary battery 16. The secondary battery 16 is too large to explode; wherein a plurality of secondary batteries 16 are arranged side by side in series to form a battery pack 10, and the way of series connection is to connect the conductive terminal 162 and the conductive terminal 162 of the adjacent secondary battery 16 through a conductive sheet 18 connected, but one of the conductive terminals 162 of the first row of secondary batteries 16' and the last row of secondary batteries 16" is not connected to the conductive terminal 162 of the adjacent secondary battery 16, and the conductive terminal that is not connected to the adjacent secondary battery 16 162 is used as the conductive part 12 of the battery pack 10. The above-mentioned conductive sheet 18 uses a fixing element 20 to lock the conductive sheet 18 on two adjacent conductive terminals 162 to connect multiple secondary batteries 16 in series. The fixing element 20 can be For stainless steel bolts.

In addition, the battery pack 10 also includes a first fixing frame 22 and a second fixing frame 24, which are respectively arranged on the upper and lower ends of the plurality of secondary batteries 16 to fix the plurality of secondary batteries 16, wherein the first The fixing frame 22 is arranged on one end of the plurality of secondary batteries 16 provided with the conductive terminals 162 and the vent valve 164, and the first fixing frame 22 is provided with a plurality of perforations 220 to expose the conductive terminals 162 and the vent valve 164, and the second The fixing frame 24 is arranged on one end of the plurality of secondary batteries 16 that are not provided with the conductive terminal 162 and the gas release valve 164. Using the first fixing frame 22 and the second fixing frame 24, the plurality of secondary batteries 16 can be arranged side by side and fixed, so that Cover with protective layer 30.

To sum up, the present invention can absorb the heat energy generated by the battery pack, and can guide the heat energy in the battery pack to the outside, which can prevent the battery pack from being overheated, and the present invention can isolate the external air and moisture to prevent the battery pack from getting wet In addition, the purpose of anti-freezing can also be achieved, and the invention has simple structure, high production efficiency and relatively low production cost.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation scope of the present invention. Therefore, all equivalent changes or modifications based on the features and spirit described in the claims of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A secondary battery pack with protection function, comprising: A battery pack, two ends of which are respectively provided with a conductive part, and each of the conductive parts is electrically connected to a lead wire; a casing, which is provided with an accommodating space for accommodating the battery pack; and A protective layer, the protective layer fills the casing and covers the battery pack, and exposes the lead wires, the protective layer is solid at normal temperature. 2. The secondary battery pack with protective function as claimed in claim 1, wherein the protective layer is a liquid protective layer when the temperature is between 46°C and 90°C. 3. The secondary battery pack with protective function as claimed in claim 1, wherein the protective layer is made of wax. 4. The secondary battery pack with protective function as claimed in claim 1, wherein the casing is a metal casing. 5. The secondary battery pack with protective function as claimed in claim 4, wherein the metal casing is an aluminum casing. 6. The secondary battery pack with protection function as claimed in claim 1, wherein the battery pack further comprises a plurality of secondary batteries, the multiple secondary batteries are arranged side by side, and each of the secondary batteries is provided with Two conductive terminals, the plurality of conductive terminals are connected to the conductive terminals of the adjacent secondary batteries to connect the multiple secondary batteries in series, wherein the first row of the secondary battery and one of the last row of the secondary batteries The conductive terminal is not connected to the conductive terminal of the adjacent secondary battery, so as to serve as the conductive part of the battery pack. 7. The secondary battery pack with protective function as claimed in claim 6, wherein a gas release valve is provided on each secondary battery and between the two conductive terminals for releasing the internal gas in the secondary battery. pressure. 8. The secondary battery pack with protection function according to claim 7, further comprising a first fixing frame and a second fixing frame, the first fixing frame and the second fixing frame are respectively arranged on the plurality of two two ends of the secondary battery to fix the plurality of secondary batteries, wherein the first fixing frame ring is set on one end of the plurality of secondary batteries provided with the conductive terminal and the gas release valve, and the first fixing frame is provided with A plurality of holes are formed to expose the conductive terminal and the air release valve. 9. The secondary battery pack with protection function as claimed in claim 6, wherein the secondary battery further comprises a plurality of conductive sheets, and the plurality of conductive sheets are locked on two adjacent conductive terminals to connect the two terminals in series. Multiple secondary batteries. 10 . The secondary battery pack with protection function as claimed in claim 9 , wherein the conductive sheet is fixed to the conductive terminal by a fixing element. 11 .