Lithium battery with high-temperature protection structure

Abstract

The utility model relates to the field of lithium batteries, and discloses a lithium battery with a high-temperature protection structure, which comprises a battery shell and a battery cover detachably arranged above the battery shell, a heat conduction substrate is detachably arranged on the inner side of the bottom of the battery shell, a plurality of heat dissipation fin plates are uniformly arranged above the heat conduction substrate, and the heat dissipation fin plates are detachably arranged above the battery shell. A single battery is arranged on the heat dissipation fin plate, a heat dissipation assembly is arranged on the heat conduction substrate, a heat dissipation air row is embedded in the lower part of the front part of the battery shell, a heat dissipation groove is formed in the upper part of the rear part of the battery shell, a dustproof plate is arranged on the outer side of the heat dissipation groove, and the heat dissipation assembly comprises a cooling pipe embedded in the bottom of the heat conduction substrate; a plurality of guide sheets are uniformly arranged above the heat conduction substrate, a plurality of heat conduction frames are uniformly arranged on the left side and the right side of each guide sheet respectively, the guide sheets are located among the single batteries respectively, the end faces of the heat conduction frames are attached to the corresponding single batteries, high-temperature protection can be carried out on the lithium battery, and therefore normal use of the lithium battery is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery with a high-temperature protection structure. Background Art

[0002] Lithium battery is a primary battery with lithium metal or lithium alloy as negative electrode material and non-aqueous electrolyte solution. It is different from rechargeable lithium-ion battery and lithium-ion polymer battery. The inventor of lithium battery is Edison. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium battery has not been used for a long time. With the development of microelectronics technology in the late 20th century, the number of miniaturized devices has increased, which has put forward high requirements on power supply. Lithium battery has entered the large-scale practical stage. Lithium-ion battery has been widely used in digital communication equipment, power tools, electric vehicles and other fields due to its long cycle life, safety, environmental protection, high energy density and other advantages.

[0003] When multiple groups of single lithium batteries work for a long time, the temperature inside the battery will be too high. If the temperature remains high for a long time, it is easy to cause the battery to age, thereby affecting the normal use of the lithium battery, and even causing the battery to explode. Therefore, we propose a lithium battery with a high temperature protection structure. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a lithium battery with a high temperature protection structure, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: The utility model discloses a lithium battery with a high-temperature protection structure, including a battery shell and a battery cover detachably arranged on the top of the battery shell, a heat-conducting substrate detachably arranged on the inner side of the bottom of the battery shell, a plurality of heat-dissipating fins are evenly arranged above the heat-dissipating substrate, single batteries are arranged on the heat-dissipating fins, a heat-dissipating assembly is arranged on the heat-dissipating substrate, a heat-dissipating vent is embedded in the front lower part of the battery shell, a heat-dissipating groove is opened on the rear upper part of the battery shell, and a dust-proof plate is arranged on the outer side of the heat-dissipating groove.

[0006] As a preferred solution, the heat dissipation component includes a cold pipe embedded in the bottom of the heat-conducting substrate, a plurality of guide plates are evenly arranged above the heat-conducting substrate, and a plurality of heat-conducting frames are evenly arranged on the left and right sides of the guide plates.

[0007] As a preferred solution, the plurality of guide plates are respectively located between the plurality of single cells, the longitudinal cross-section of the heat-conducting frame is T-shaped, and the end surface of the heat-conducting frame is in contact with the corresponding single cells.

[0008] As a preferred solution, the cooling tube is a continuously bent curved structure, one end of the cooling tube is an inlet, and the other end of the cooling tube is an outlet, and the inlet and the outlet are extended outside the battery housing.

[0009] As a preferred solution, the heat-conducting substrate, the heat-dissipating fins and the guide plates are integrated into one structure, and the thickness of the heat-conducting substrate is 3 cm.

[0010] As a preferred solution, a cavity is opened on the side of the battery shell, fireproof mud is arranged in the cavity, and a fireproof cushion layer is adhered to the inner wall of the battery shell.

[0011] As a preferred solution, buffer pads are respectively arranged on the left and right inner walls of the fireproof cushion layer, and the two buffer pads are fitted with the corresponding single batteries on both sides.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model avoids the single battery from being in a high temperature state through the structural setting of the heat dissipation component, thereby affecting the normal use of the battery. The user connects the external condenser at the inlet end of the cold pipe to allow the coolant to circulate in the cold pipe, thereby keeping the temperature of the thermally conductive substrate in a low state. By arranging heat dissipation fins on the thermally conductive substrate and installing the single battery on the heat dissipation fins, the lower temperature of the thermally conductive substrate is transferred to the heat dissipation fins, and the bottom of the single battery is heat-dissipated. The guide plate is arranged on the thermally conductive substrate and the guide plate is located between adjacent single batteries. The longitudinal cross-section of the heat conductive frame is T-shaped, and the end face of the heat conductive frame is in contact with the corresponding single battery. The lower temperature on the heat conductive substrate is applied to the single battery through the heat conductive frame and the guide plate, thereby cooling the single battery. The stability of the single battery in the battery housing can also be ensured by the heat conductive frame and the guide plate.

[0014] By positioning the heat dissipation duct and the heat dissipation slot, and supporting the single battery through the heat conduction frame and the guide plate, a gap is created between two adjacent single batteries, and the heat dissipation duct is lifted toward the battery housing to effectively dissipate the heat of the single battery, thereby better dissipating the hot air inside the battery housing.

[0015] A cavity is opened on the side of the battery shell, fireproof mud is arranged in the cavity, and a fireproof cushion layer is adhered to the inner wall of the battery shell to prevent the single battery from spontaneously igniting due to excessive temperature, thereby preventing the fire from spreading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0018] Figure 3It is a schematic diagram of the structure of the internal components of the battery housing;

[0019] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0020] Figure 5 It is a schematic diagram of the structure of the lower part of the internal components of the battery housing;

[0021] Figure 6 It is a schematic diagram of the structure of the battery casing.

[0022] In the figure: 1. Battery housing; 2. Battery cover; 3. Heat-conducting substrate; 4. Heat-dissipating fins; 5. Single battery; 6. Heat-dissipating vent; 7. Dust-proof plate; 8. Cold pipe; 9. Guide plate; 10. Heat-conducting frame; 11. Fire-proof mud; 12. Fire-proof cushion layer; 13. Buffer pad. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 6 A lithium battery with a high-temperature protection structure of the present embodiment includes a battery case 1 and a battery cover 2 detachably arranged on the top of the battery case 1. The battery cover 2 is provided with multiple electric contacts for convenient electric contact connection with a single battery 5. The battery case 1 and the battery cover 2 are made of polyethylene. A heat-conducting substrate 3 is detachably arranged on the inner side of the bottom of the battery case 1. The heat-conducting substrate 3 is made of copper. Copper has good thermal conductivity. A plurality of heat-dissipating fins 4 are evenly arranged above the heat-conducting substrate 3. The heat-dissipating fins 4 are coated with heat-dissipating silicone grease, which is beneficial to heat dissipation treatment of the bottom of the single battery 5 to avoid the bottom of the single battery 5 being in a high temperature state. The heat-dissipating fins 4 are provided with a single Battery 5, the single cell 5 is a lithium battery, and a heat dissipation component is arranged on the heat conductive substrate 3, and the heat dissipation component is used to perform heat dissipation treatment on the single cell 5 to prevent the single cell 5 from being in a high temperature state, thereby affecting the normal use of the battery. A heat dissipation vent 6 is embedded in the front lower part of the battery housing 1, and a heat dissipation groove is opened in the rear upper part of the battery housing 1. The position setting of the heat dissipation vent 6 and the heat dissipation groove enables the heat dissipation vent 6 to effectively dissipate the heat of the single cell 5 toward the battery housing 1, thereby better dissipating the hot air inside the battery housing 1, and a dustproof plate 7 is arranged on the outside of the heat dissipation groove, and the dustproof plate 7 is a plastic perforated plate to prevent external dust from entering the interior of the battery housing 1.

[0025] like Figures 3 to 5As shown, the heat dissipation assembly includes a cold pipe 8 embedded in the bottom of the heat-conducting substrate 3, a plurality of guide plates 9 are evenly arranged above the heat-conducting substrate 3, and a plurality of heat-conducting frames 10 are evenly arranged on the left and right sides of the guide plates 9, respectively, to prevent the single battery 5 from being in a high temperature state, thereby affecting the normal use of the battery.

[0026] like Figure 3 , 4 As shown, a plurality of guide plates 9 are respectively located between a plurality of single cells 5, and a longitudinal cross-section of the heat-conducting frame 10 is T-shaped. The end surface of the heat-conducting frame 10 is in contact with the corresponding single cells 5. The lower temperature on the heat-conducting substrate 3 is applied to the single cells 5 through the heat-conducting frame 10 and the guide plates 9, thereby cooling the single cells 5.

[0027] like Figure 5 As shown, the cold pipe 8 is a continuously bent curved structure, one end of the cold pipe 8 is an inlet, and the other end of the cold pipe 8 is an outlet. The inlet and the outlet are extended to the outside of the battery housing 1. The inlet end of the cold pipe 8 is connected to an external condenser to facilitate the circulation of the coolant in the cold pipe 8, thereby cooling the temperature of the heat-conducting substrate 3 and further cooling the single battery 5.

[0028] like Figure 3 As shown in Figure 5, the thermal conductive substrate 3, the heat dissipation fins 4 and the guide plate 9 are arranged as an integrated structure, so that the thermal conductive frame 10 formed by the thermal conductive substrate 3, the heat dissipation fins 4 and the guide plate 9 is more stable, thereby on the one hand improving the stability of the single cell 5 in the battery housing 1, and on the other hand, the single cell 5 can be cooled. The thickness of the thermal conductive substrate 3 is 3CM, so that the support of the thermal conductive substrate 3 is improved.

[0029] like Figures 1 to 2 As shown, a cavity is opened on the side of the battery housing 1, in which a fireproof mud 11 is arranged, and a fireproof cushion layer 12 is adhered to the inner wall of the battery housing 1 to prevent the single battery 5 from spontaneously igniting due to excessive temperature and the spread of fire.

[0030] like Figure 1 As shown in 2 or 6, buffer pads 13 are respectively provided on the left and right inner walls of the fireproof cushion layer 12, and the two buffer pads 13 are fitted with the corresponding single cells 5 on both sides, which on the one hand allow the single cells 5 to be stably placed in the battery housing 1, and on the other hand prevent the battery housing 1 from impacting and protect the single cells 5.

[0031] In the specific implementation of this embodiment, the structural setting of the heat dissipation component is used to avoid the single battery 5 being in a high temperature state, thereby affecting the normal use of the battery. The user connects the external condenser at the inlet end of the cold pipe 8 so that the coolant flows in the cold pipe 8, thereby keeping the temperature of the heat-conducting substrate 3 at a lower state. The heat dissipation fins 4 are set on the heat-conducting substrate 3, and the single battery 5 is installed on the heat dissipation fins 4, so that the lower temperature of the heat-conducting substrate 3 is transferred to the heat dissipation fins 4, and the bottom of the single battery 5 is heat-dissipated. The guide sheet 9 is set on the heat-conducting substrate 3, and the guide sheet 9 is located between adjacent single batteries 5. The heat-conducting frame 10 The longitudinal cross section is T-shaped, and the end face of the heat-conducting frame 10 is fitted with the corresponding single battery 5. The lower temperature on the heat-conducting substrate 3 is applied to the single battery 5 through the heat-conducting frame 10 and the guide plate 9, thereby cooling the single battery 5. The heat-conducting frame 10 and the guide plate 9 can also ensure the stability of the single battery 5 in the battery housing 1. The heat dissipation duct 6 and the heat dissipation groove are positioned, and the single battery 5 is supported by the heat-conducting frame 10 and the guide plate 9, so that a gap appears between two adjacent single batteries 5, and the heat dissipation duct 6 is lifted to the battery housing 1 to effectively dissipate the heat of the single battery 5, thereby better dissipating the hot air inside the battery housing 1.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery with a high temperature protection structure, comprising a battery housing (1) and a battery cover (2) detachably disposed above the battery housing (1), characterized in that: A heat-conducting substrate (3) is detachably provided on the inner side of the bottom of the battery housing (1); a plurality of heat-dissipating fins (4) are evenly provided above the heat-dissipating substrate (3); single batteries (5) are provided on the heat-dissipating fins (4); a heat-dissipating assembly is provided on the heat-conducting substrate (3); a heat-dissipating vent (6) is embedded in the lower front portion of the battery housing (1); a heat-dissipating groove is provided on the upper rear portion of the battery housing (1); and a dust-proof plate (7) is provided on the outer side of the heat-dissipating groove.

2. A lithium battery with a high temperature protection structure according to claim 1, characterized in that: The heat dissipation component comprises a cold pipe (8) embedded in the bottom of a heat-conducting substrate (3); a plurality of guide plates (9) are evenly arranged above the heat-conducting substrate (3); and a plurality of heat-conducting frames (10) are evenly arranged on the left and right sides of the guide plates (9).

3. A lithium battery with a high temperature protection structure according to claim 2, characterized in that: The plurality of guide plates (9) are respectively located between the plurality of single cells (5); the longitudinal cross section of the heat-conducting frame (10) is T-shaped; and the end surface of the heat-conducting frame (10) is in contact with the corresponding single cells (5).

4. The lithium battery with a high temperature protection structure according to claim 3, characterized in that: The cold pipe (8) is a continuously bent curved structure, one end of the cold pipe (8) is an inlet, the other end of the cold pipe (8) is an outlet, and the inlet and the outlet are extended outside the battery housing (1).

5. The lithium battery with a high temperature protection structure according to claim 4, characterized in that: The heat-conducting substrate (3), the heat-dissipating fins (4) and the guide plate (9) are arranged as an integrated structure, and the thickness of the heat-conducting substrate (3) is 3 cm.

6. The lithium battery with a high temperature protection structure according to claim 1, characterized in that: A cavity is provided on the side of the battery housing (1), fireproof mud (11) is arranged in the cavity, and a fireproof cushion layer (12) is adhered to the inner wall of the battery housing (1).

7. A lithium battery with a high temperature protection structure according to claim 6, characterized in that: Buffer pads (13) are respectively arranged on the left and right inner walls of the fireproof cushion layer (12), and the two buffer pads (13) are fitted with the corresponding single batteries (5) on both sides.

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