TWI621296B - Protective secondary battery pack - Google Patents

Abstract

The present invention is a secondary battery pack with a protective function, which comprises a conductive portion at each end of a battery pack, and each conductive portion is electrically connected with a lead wire for electrically connecting the external device through the lead wire to supply power. To the external device, a housing has an accommodating space for accommodating the battery pack, and a protective film fills the housing and covers the battery pack and exposes the lead, wherein the protective film is solid at normal temperature and melts at high temperature. In the liquid state, the protective film can be used to isolate the battery pack from the external environment, protect the battery pack and effectively conduct heat. In view of the above, the present invention can cover the battery pack through the wax film to guide the thermal energy of the battery pack and absorb the heat energy of the battery pack, and isolate the outside air, so as to avoid the explosion of the contact with the oxygen in the air when the temperature of the battery pack is too high, so as to explode. Protect the battery pack.

Description

Protective secondary battery pack

The present invention relates to a secondary battery pack, and more particularly to a secondary battery pack having a protective function for isolating the battery pack from the external environment.

The term "secondary battery" refers to a battery that can be recharged after the power consumption of the battery is completed. In recent years, due to the development of green energy, many locomotives, automobiles, and large machinery have not used gasoline to start, and use electric energy to start. However, locomotives, automobiles, or large machinery require a large amount of electric power to start. In order to generate a large amount of electric power for the secondary battery, it is necessary to connect a plurality of secondary batteries in series, and connect the conductive terminals of the plurality of secondary batteries through the conductive sheets. The plurality of secondary batteries are connected in series as one battery pack, thereby providing greater power.

However, when the battery pack is used in a vehicle or a large machine, it may be exposed to the wind or rain due to exposure of the vehicle or large machinery to the outside, and the battery pack inside the vehicle or the large machine may be leaky due to moisture. If the temperature of the vehicle or large machinery is below zero, it is likely to cause the battery pack to freeze, resulting in the battery pack being unable to generate electric energy or causing leakage, etc. In severe cases, the user may be injured due to leakage or explosion of the battery pack. Furthermore, the battery pack may generate high temperatures due to improper internal discharge. If the heat energy is not properly discharged, the battery pack may explode. Therefore, protecting the battery pack from being damaged by the external environment of the battery pack and effectively dissipating heat are now a very important part.

In view of the above, the present invention proposes a protective secondary battery pack to effectively overcome the above problems in view of the above-mentioned shortcomings of the prior art.

The main object 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 can guide the heat energy in the battery pack to the outside, avoiding the battery pack being overheated and being able to isolate the outside. The air and moisture prevent the battery pack from being wet, and in addition, it can achieve the purpose of antifreeze.

Another object of the present invention is to provide a secondary battery pack having a protective 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 having a protective function, comprising a conductive portion at each end of a battery pack, and each conductive portion is electrically connected to a lead, a casing and a shell. The body has an accommodating space for accommodating the battery pack, and a protective film fills the casing and covers the battery pack and exposes the lead wires, wherein the protective film is solid at normal temperature, and can be melted into a liquid state at a high temperature, using a protective film It can isolate the battery pack from the external environment, protect the battery pack and effectively conduct heat.

The purpose, technical content, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments.

1‧‧‧Secondary battery pack with protective function

10‧‧‧Battery Pack

12‧‧‧Electrical Department

14‧‧‧ lead

16‧‧‧Secondary battery

16'‧‧‧Secondary battery

16”‧‧‧Secondary battery

162‧‧‧Electrical terminals

164‧‧‧Discharge valve

18‧‧‧Conductor

20‧‧‧Fixed components

22‧‧‧First fixed frame

220‧‧‧through holes

24‧‧‧second fixed frame

30‧‧‧Protective film

30’‧‧‧Wax

40‧‧‧shell

42‧‧‧ accommodating space

The first figure is a perspective view of the present invention.

The second figure is a perspective view of the invention.

The third figure is a perspective exploded view of the present invention.

The fourth figure is a perspective view of the battery pack of the present invention.

Referring to the first to second figures, as shown in the figure, the protective battery pack 1 includes a conductive portion 12 at each end of the battery pack 10, and each of the conductive portions 12 is electrically connected to a lead. 14; a housing 40, the housing 40 has an accommodating space 42 for accommodating the battery pack 10; a protective film 30 fills the housing 40 and covers the battery pack 10, so that the battery pack 10 only exposes the lead 14 for protection The outside of the film 30 is provided for the battery pack 10 to be electrically connected to an external device (not shown) through the lead 14 to supply power to the external device. In this embodiment, the protective film 30 is a wax, so the protective film 30 is solid at normal temperature, and can be melted into a liquid state at a high temperature, and the battery pack 10 is completely covered with the protective film 30 to isolate the battery pack 10 from the external environment. When the temperature of the external environment is lowered to below zero degrees Celsius, the battery pack 10 is frozen, and the battery pack 10 is covered with the protective film 30 to effectively block the moisture, prevent the battery pack 10 from being wet, and isolate the external gas such as oxygen. The flammable gas is in contact with the battery pack 10 to prevent the battery group 10 from being in contact with oxygen to generate a chemical reaction when the temperature is too high, and the combustion causes an explosion. In addition, since the temperature of the protective film 30 is between 46 ° C and 90 ° C, it melts into the liquid protective film 30. Therefore, when the temperature of the battery pack 10 exceeds 46 ° C to 90 ° C, the protective film 30 melts and melts. At the same time, the heat energy of the battery pack 10 can be absorbed to prevent the temperature of the battery pack 10 from being too high. Of course, the protective film 30 can be melted while continuously insulating the outside air temperature, moisture, air, etc., and avoid contact with oxygen when the temperature of the battery pack 10 is too high. Produces a chemical action and burns to cause an explosion. In addition, since the housing 40 is a metal housing, the embodiment is an aluminum housing, and the heat conductivity of the aluminum is high. Therefore, the housing 40 of the embodiment is matched with the protective film 30, and can effectively absorb the absorption of the protective film 30. The heat energy greatly improves the heat transfer efficiency.

Next, please refer to the second and third figures to illustrate how to cover the protective film 30 with the battery pack 10. As shown, the battery pack 10 is first placed in the accommodating space 42 of the housing 40 due to In this embodiment, the protective film 30 is a wax film. Therefore, when the secondary battery pack 1 having the protective function is formed, the heated wax 30' is poured into the casing 40 to fill the casing 40. The space 42 covers the battery pack 10 but exposes the lead 14, and finally waits for the wax 30' to cool and solidify, forming a wax film, that is, the protective film 30 is wrapped around the battery pack 10.

Next, please refer to the second diagram and the fourth diagram for explaining the structure of the battery pack 10 of the present invention. The battery pack 10 includes a plurality of secondary batteries 16 which are juxtaposed to each other and each secondary battery 16 There are two conductive terminals 162 respectively, and a bleed valve 164 is disposed between each of the secondary batteries 16 and between the two conductive terminals 162, which can release the internal pressure of the secondary battery portion 16 and avoid the internal pressure of the secondary battery 16. If the battery is too large, the secondary battery 16 is exploded; wherein the plurality of secondary batteries 16 are connected in series to each other to form the battery pack 10, and the series connection is performed by connecting a conductive terminal 162 and a conductive terminal of the adjacent secondary battery 16 by a conductive sheet 18. 162 is connected, but one of the first row of secondary batteries 16' and the tail row of secondary batteries 16' is not connected to the conductive terminals 162 of the adjacent secondary battery 16, and is not electrically connected to the adjacent secondary battery 16. The terminal 162 is used as the conductive portion 12 of the battery pack 10. The conductive sheet 18 is used to lock the conductive sheet 18 to the adjacent two conductive terminals 162 by using a fixing member 20 to connect the plurality of secondary batteries 16 in series. The fixing element 20 can be stainless steel Bolts.

In addition, the battery pack 10 further includes a first fixing frame 22 and a second fixing frame 24 respectively disposed at 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 disposed on the plurality of secondary batteries 16 having one of the conductive terminals 162 and the venting valve 164, and the first fixing frame 22 has a plurality of holes 220 to expose the conductive terminals 162 and the vent valve 164, and the second fixing frame 24 is disposed on the plurality of secondary batteries 16 having no conductive terminals 162 and one end of the vent valve 164, and the first fixed frame 22 and the second fixed frame 24 can be used to multiple The secondary battery 16 is side by side and fixed to cover the protective film 30.

In summary, 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, can avoid the battery pack temperature is too high, and the invention can isolate the outside air and moisture to prevent the battery pack from being wet. In addition, the purpose of antifreeze can be achieved, and the invention has the advantages of simple structure, high production efficiency and relatively low production cost.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, any changes or modifications of the features and spirits of the present invention should be included in the scope of the present invention.

Claims (9)

A secondary battery pack with a protective function, comprising: a battery pack having a conductive portion at each end thereof, and each of the conductive portions is electrically connected to a lead; and a housing having an accommodating space therein; Accommodating the battery pack; and a protective film filling the casing and covering the battery pack, and exposing the lead wire, the protective film being solid at normal temperature, the protective film being between 46 ° C and 90 ° C It is a liquid protective film. A secondary battery pack having a protective function according to claim 1, wherein the protective film is a wax. A secondary battery pack having a protective function according to claim 1, wherein the housing is a metal housing. A secondary battery pack having a protective function according to claim 3, wherein the metal casing is an aluminum casing. The secondary battery pack according to claim 1, wherein the battery pack further comprises a plurality of secondary batteries, the secondary batteries are arranged side by side, and each of the secondary batteries has two conductive terminals respectively. The conductive terminals are connected to the conductive terminals adjacent to the secondary battery to connect the secondary batteries in series, wherein the first row of the secondary battery and the tail row of the secondary battery are not adjacent to one of the conductive terminals The conductive terminal of the secondary battery is connected to serve as the conductive portion of the battery pack. The secondary battery pack according to claim 5, wherein each of the secondary batteries is further provided with a bleed valve between the two conductive terminals for releasing the pressure in the secondary battery portion. The secondary battery pack having the protective function according to claim 6, further comprising a first fixing frame and a second fixing frame respectively disposed at two ends of the secondary batteries to fix the secondary batteries, wherein The first fixed frame ring is disposed on the secondary battery having the conductive terminal and the vent valve An end of the first fixing frame has a plurality of holes for exposing the conductive terminal and the air release valve. The secondary battery pack according to claim 5, wherein the secondary battery further comprises a plurality of conductive sheets locked to the adjacent two of the conductive terminals to connect the secondary batteries in series. The secondary battery pack according to claim 8, wherein the conductive sheet is fixed to the conductive terminal by a fixing member.