A lithium battery shell convenient for heat dissipation

Abstract

The utility model relates to a lithium battery shell in the field of lithium battery shells, which is convenient for heat dissipation. The utility model comprises a shell, a housing cavity is arranged in the shell, a battery cell is arranged in the housing cavity, a heat conducting member is arranged on the surface of the shell, a plurality of heat dissipation fins are arranged at an end of the heat conducting member away from the shell, the plurality of heat dissipation fins are equidistantly arranged on the surface of the heat conducting member, the heat dissipation fins are perpendicular to the surface of the heat conducting member, fin fixing brackets are arranged on both sides of the shell, a fixed middle plate parallel to the surface of the heat conducting member is arranged in the fin fixing bracket, the fixed middle plate separates the fixed bracket into a first heat dissipation layer and a second heat dissipation layer, a plurality of limiting through grooves are arranged on the surface of the fixed middle plate, the plurality of limiting through grooves are respectively aligned with the plurality of heat dissipation fins, an end of the heat dissipation fin away from the heat conducting member passes through the limiting through grooves and extends into the second heat dissipation layer, and the fin fixing bracket can protect the heat dissipation fins from direct contact with other objects when a collision occurs, thereby avoiding deformation of the heat dissipation fins.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery shells, in particular to a lithium battery shell which is convenient for heat dissipation. Background Art

[0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solution. Its working principle is based on the embedding and de-embedding process of lithium ions. During charging and discharging, lithium ions are embedded and de-embedded back and forth between the positive and negative electrodes, which is figuratively called a "rocking chair battery". Lithium batteries have the advantages of high energy density, light weight, low self-discharge rate, and fast charging, making them an ideal choice for mobile devices, electric vehicles, and energy storage power systems. At the same time, lithium batteries are widely used in transportation power supply, power energy storage power supply, mobile communication power supply, new energy storage power supply, and aerospace special power supply.

[0003] The lithium battery shell is an important component that protects the internal circuit and battery cells of the lithium battery, and has multiple functions. First, the shell can protect the battery cells by making them airtight and sealed, preventing external substances such as air and moisture from damaging the battery cells. At the same time, the shell can also provide mechanical support for the battery cells and protect them. Secondly, the lithium battery shell can isolate the battery cells to a certain extent. When the battery cells are short-circuited or overcharged, the shell can effectively isolate the area where the short circuit occurs, preventing the battery cells from overheating, catching fire, and exploding.

[0004] The outer shell of a lithium battery is usually made of plastic. The plastic outer shell is light and low in cost, but has poor thermal conductivity. Existing lithium battery outer shells are often provided with a metal heat conducting plate on the surface. The two ends of the metal heat conducting plate are respectively in contact with the inside of the lithium battery outer shell and the outside air, so that the heat in the lithium battery outer shell is dissipated to the outside air through the metal heat conducting plate. In order to improve the heat dissipation efficiency, a plurality of heat dissipating fins are provided on the surface of the metal heat conducting plate. Since the heat dissipating fins themselves have a thin structure, when a collision occurs during use, the heat dissipating fins are easily deformed, resulting in reduced heat dissipation efficiency. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art solutions, the utility model provides a lithium battery housing that is easy to dissipate heat and can effectively solve the technical problem that the heat dissipation fins are prone to deformation.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A lithium battery shell that is easy to dissipate heat, includes a shell, a accommodating cavity is arranged in the shell, a battery cell is arranged in the accommodating cavity, a heat conductive member is arranged on the surface of the shell, a plurality of heat dissipation fins are arranged at an end of the heat conductive member away from the shell, the plurality of heat dissipation fins are equidistantly arranged on the surface of the heat conductive member, the heat dissipation fins are perpendicular to the surface of the heat conductive member, fin fixing brackets are arranged on both sides of the shell, a fixed middle plate parallel to the surface of the heat conductive member is arranged in the fin fixing bracket, the fixed middle plate separates the fixed bracket into a first heat dissipation layer and a second heat dissipation layer, a plurality of limiting through grooves are arranged on the surface of the fixed middle plate, the plurality of limiting through grooves are respectively aligned with the plurality of heat dissipation fins, and an end of the heat dissipation fin away from the heat conductive member passes through the limiting through grooves and extends into the second heat dissipation layer.

[0008] Furthermore, a ventilation opening is provided on the surface of the fin fixing bracket, and the ventilation opening is provided in the middle of the fixing bracket away from one end of the shell.

[0009] Furthermore, one end of the fin fixing bracket is provided with more than three air intake fans, and the directions of the more than three air intake fans are consistent and are distributed at equal intervals.

[0010] Furthermore, the air intake fan is connected to the fin fixing bracket via a fan bracket, a fixed connecting plate is provided on an edge of the fan bracket, and the fixed connecting plate is connected to the fin fixing bracket via bolts.

[0011] Furthermore, the shell includes a bottom shell and an upper cover, the battery cell is arranged in the bottom shell, and the upper cover is provided with a main control circuit board and electrode columns, the electrode columns extend to the surface of the upper cover, and the electrode columns and the battery cell are electrically connected to the main control circuit board.

[0012] Furthermore, a storage groove is provided on the surface of the upper cover, a flippable handle is provided in the storage groove, and the handle is connected to the storage groove via a horizontal rotating shaft.

[0013] Furthermore, a shock-absorbing base is provided at the lower end of the bottom shell, and a plurality of buffer cavities are provided in the shock-absorbing base.

[0014] Furthermore, a positioning groove is provided on the surface of the shell, and a positioning boss is provided on one end of the heat conductor close to the shell. The positioning boss can be inserted into the positioning groove, and the edge of the heat conductor is connected to the shell by bolts.

[0015] Compared with the prior art, the beneficial effects of the utility model are: a fin fixing bracket is provided, a fixed middle plate parallel to the surface of the heat conducting member is provided in the fin fixing bracket, a plurality of limiting through grooves are provided on the surface of the fixed middle plate, when the fin fixing bracket is installed on the side wall of the shell, the end of the heat dissipation fin away from the heat conducting member passes through the second heat dissipation layer and the limiting through grooves in sequence, and extends into the second heat dissipation layer, so that the surface of the heat dissipation fin is limited in position by the fixed middle plate, when a collision occurs, the fin fixing bracket can protect the heat dissipation fin from direct contact with other objects, avoiding deformation of the heat dissipation fins, and at the same time, the heat dissipation fins are mutually connected and supported by the fixed middle plate, so that the structure of the heat dissipation fins is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a lithium battery housing that is convenient for heat dissipation in the utility model;

[0017] Figure 2 This is a schematic structural diagram of a heat-conducting member and a bottom shell in a lithium battery shell that is convenient for heat dissipation according to the utility model;

[0018] Figure 3 This is a schematic diagram of the main structure of a heat-conducting member and a fin fixing bracket in a lithium battery housing that is convenient for heat dissipation according to the utility model;

[0019] Figure 4 It is a rear view structural schematic diagram of a heat-conducting member and a fin fixing bracket in a lithium battery housing that is convenient for heat dissipation according to the utility model;

[0020] Numbers in the figure: 1- bottom shell, 2- upper cover, 3- accommodating cavity, 4- heat conducting member, 5- positioning boss, 6- positioning groove, 7- heat sink fin, 8- fin fixing bracket, 9- fixed middle plate, 10- limiting through groove, 11- ventilation opening, 12- air intake fan, 13- fan bracket, 14- storage slot, 15- handle, 16- electrode column, 17- shock absorbing base, 18- buffer cavity. DETAILED DESCRIPTION

[0021] 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.

[0022] Combine the following Figure 1-Figure 4 A lithium battery housing that is convenient for heat dissipation is described in detail:

[0023] A lithium battery shell for heat dissipation includes a shell, a receiving cavity 3 is provided in the shell, a battery cell is provided in the receiving cavity 3, a heat conducting member 4 is provided on the surface of the shell, a positioning groove 6 is provided on the surface of the shell, a positioning boss 5 is provided on one end of the heat conducting member 4 close to the shell, the positioning boss 5 can be inserted into the positioning groove 6, the edge of the heat conducting member 4 is connected to the shell by bolts, a plurality of heat dissipation fins 7 are provided on the end of the heat conducting member 4 away from the shell, the plurality of heat dissipation fins 7 are equidistantly provided on the surface of the heat conducting member 4, the heat dissipation fins 7 are perpendicular to the surface of the heat conducting member 4, fin fixing brackets 8 are provided on both sides of the shell, and the fin fixing brackets 8 are provided inside There is a fixed middle plate 9 parallel to the surface of the heat conductor 4, and the fixed middle plate 9 separates the fixed bracket into a first heat dissipation layer and a second heat dissipation layer. A plurality of limiting through grooves 10 are provided on the surface of the fixed middle plate 9, and the plurality of limiting through grooves 10 are respectively aligned with a plurality of heat dissipation fins 7. The end of the heat dissipation fin 7 away from the heat conductor 4 passes through the limiting through grooves 10 and extends to the second heat dissipation layer. A ventilation opening 11 is provided on the surface of the fin fixing bracket 8, and the ventilation opening 11 is arranged in the middle of the end of the fixing bracket away from the shell. The ventilation opening 11 allows more air to flow into the fin fixing bracket 8 to prevent the fin fixing bracket 8 from affecting the heat dissipation of the heat dissipation fins 7.

[0024] A lithium battery casing that is easy to dissipate heat in the present embodiment is provided with a fin fixing bracket 8, a fixed middle plate 9 parallel to the surface of the heat conducting member 4 is provided in the fin fixing bracket 8, and a plurality of limiting through grooves 10 are provided on the surface of the fixed middle plate 9. When the fin fixing bracket 8 is installed on the side wall of the shell, the end of the heat dissipating fin 7 away from the heat conducting member 4 passes through the second heat dissipating layer and the limiting through groove 10 in sequence, and extends into the second heat dissipating layer, so that the surface of the heat dissipating fin 7 is limited in position by the fixed middle plate 9. When a collision occurs, the fin fixing bracket 8 can protect the heat dissipating fin 7 from direct contact with other objects, avoiding deformation of the heat dissipating fin 7. At the same time, the heat dissipating fins 7 are mutually connected and supported by the fixed middle plate 9, so that the structure of the heat dissipating fin 7 is more stable.

[0025] One end of the fin fixing bracket 8 is provided with more than three intake fans 12, and the more than three intake fans 12 are oriented in the same direction and are distributed at equal intervals. The intake fans 12 are connected to the fin fixing bracket 8 through a fan bracket 13. A fixed connecting plate is provided on the edge of the fan bracket 13, and the fixed connecting plate is connected to the fin fixing bracket 8 through bolts. The intake fans 12 can increase the air flow rate between the heat dissipation fins 7 and improve the heat exchange efficiency between the heat dissipation fins 7 and the air.

[0026] The shell includes a bottom shell 1 and an upper cover 2, the battery cell is arranged in the bottom shell 1, and a main control circuit board and an electrode column 16 are arranged in the upper cover 2. The electrode column 16 extends to the surface of the upper cover 2, and the electrode column 16 and the battery cell are electrically connected to the main control circuit board. A storage groove 14 is arranged on the surface of the upper cover 2, and a reversible handle 15 is arranged in the storage groove 14. The handle 15 is connected to the storage groove 14 through a horizontal rotating shaft, so as to facilitate the removal of the lithium battery from the battery compartment of the device. A shock-absorbing base 17 is arranged at the lower end of the bottom shell 1, and a plurality of buffer cavities 18 are arranged in the shock-absorbing base 17. When the lithium battery is impacted from the bottom, the buffer cavity 18 can be deformed and absorb the impact force.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A lithium battery housing for heat dissipation, comprising a housing, a receiving cavity provided in the housing, a battery cell provided in the receiving cavity, characterized in that: A heat conducting member is provided on the surface of the shell, a plurality of heat dissipation fins are provided at one end of the heat conducting member away from the shell, the plurality of heat dissipation fins are equidistantly arranged on the surface of the heat conducting member, the heat dissipation fins are perpendicular to the surface of the heat conducting member, fin fixing brackets are provided on both sides of the shell, a fixed middle plate parallel to the surface of the heat conducting member is provided in the fin fixing bracket, the fixed middle plate separates the fixed bracket into a first heat dissipation layer and a second heat dissipation layer, a plurality of limiting through grooves are provided on the surface of the fixed middle plate, the plurality of limiting through grooves are respectively aligned with the plurality of heat dissipation fins, an end of the heat dissipation fin away from the heat conducting member passes through the limiting through grooves and extends to the second heat dissipation layer.

2. A lithium battery housing for heat dissipation according to claim 1, characterized in that: A ventilation opening is arranged on the surface of the fin fixing bracket, and the ventilation opening is arranged in the middle of the fixing bracket away from one end of the shell.

3. A lithium battery housing for heat dissipation according to claim 1, characterized in that: One end of the fin fixing bracket is provided with more than three air intake fans, and the directions of the more than three air intake fans are consistent and are distributed at equal intervals.

4. A lithium battery housing for heat dissipation according to claim 3, characterized in that: The air intake fan is connected to the fin fixing bracket via a fan bracket, a fixing connecting plate is provided on the edge of the fan bracket, and the fixing connecting plate is connected to the fin fixing bracket via bolts.

5. A lithium battery casing for heat dissipation according to any one of claims 1 to 4, characterized in that: The shell includes a bottom shell and an upper cover, the battery cell is arranged in the bottom shell, the main control circuit board and electrode columns are arranged in the upper cover, the electrode columns extend to the surface of the upper cover, and the electrode columns and the battery cell are electrically connected to the main control circuit board.

6. A lithium battery housing for heat dissipation according to claim 5, characterized in that: A storage groove is arranged on the surface of the upper cover, a flippable handle is arranged in the storage groove, and the handle is connected to the storage groove through a horizontal rotating shaft.

7. A lithium battery housing for heat dissipation according to claim 5, characterized in that: A shock absorbing base is arranged at the lower end of the bottom shell, and a plurality of buffer cavities are arranged in the shock absorbing base.

8. A lithium battery casing for facilitating heat dissipation according to any one of claims 1 to 4, characterized in that: The shell surface is provided with a positioning groove, and one end of the heat conducting member close to the shell is provided with a positioning boss, which can be inserted into the positioning groove, and the edge of the heat conducting member is connected to the shell by bolts.

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