Lithium ion battery with good cell temperature uniformity

Abstract

The utility model relates to the technical field of lithium ion batteries, and discloses a lithium ion battery with good cell temperature uniformity, which comprises a lithium ion battery structure, and a temperature uniformity channel structure is arranged on the outer side of the lithium ion battery structure; the lithium ion battery structure comprises a battery shell, anodes are arranged on the upper side and the lower side of the inner wall of the battery shell, cathodes are arranged on the other sides, away from the battery shell, of the anodes, a current collecting bar is arranged between the cathodes on the upper side and the lower side, a positive electrode end is arranged on the left side of the current collecting bar, and a battery cover is arranged at the joint of the positive electrode end and the battery shell. According to the lithium ion battery with the good battery cell temperature uniformity, through the use of the temperature uniformity channel structure and the combined use of the hot channel and the cold channel, external cold air can enter the lithium ion battery through the air inlet in the bottom of the cold channel, and the cold air can uniformly flow through the battery shell through the guidance of the air guide plate, so that the temperature of the battery cell is effectively reduced; the uniform distribution of the temperature of the battery cell is realized, and the performance and the safety of the battery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery with good cell temperature uniformity. Background Art

[0002] Lithium-ion batteries are energy storage devices widely used in electronic devices such as electric vehicles and smartphones. They are most commonly cylindrical or flat in structure.

[0003] At present, in the process of working, the existing lithium-ion batteries often cause uneven temperature distribution of the battery core due to uneven internal current distribution and local concentration of chemical reactions, which in turn affects the performance and life of the battery. Although there are many lithium-ion battery structures on the market, how to effectively improve the temperature uniformity of the battery core and ensure the stability and safety of the battery is still a hot spot and difficulty in current research. Therefore, the utility model provides a lithium-ion battery with good temperature uniformity of the battery core. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a lithium-ion battery with good cell temperature uniformity, which has the advantages of temperature uniformity and improved performance, and solves the problems of poor temperature uniformity and poor performance.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned temperature uniformity and improve the performance, the utility model provides the following technical solutions:

[0008] A lithium-ion battery with good cell temperature uniformity, comprising a lithium-ion battery structure, wherein a temperature uniformity channel structure is arranged outside the lithium-ion battery structure;

[0009] The lithium-ion battery structure includes a battery shell, wherein anodes are provided on the upper and lower sides of the inner wall of the battery shell, a cathode is provided on the other side of the battery shell of the anode principle, a current collecting rod is provided between the cathodes on the upper and lower sides, a positive terminal is provided on the left side of the current collecting rod, a battery cover is provided at the connection between the positive terminal and the battery shell, and a hot and cold channel is provided on the top of the battery shell.

[0010] As an optimal technical solution of the utility model, the temperature-averaging channel structure includes a hot channel located in the middle of the upper and lower sides of the hot and cold channels, cold channels are arranged on the left and right sides of the hot channel, and an isolation block is arranged at the connection between the hot channel and the cold channel.

[0011] As a preferred technical solution of the utility model, an exhaust port is provided on the right side of the top of the hot channel, air inlets are provided on the left and right sides of the bottom of the cold channel, and an air guide plate is provided on one side of the cold channel close to the battery housing.

[0012] As a preferred technical solution of the utility model, an isolation layer is provided at the connection between the anode and the cathode, insulating sheets are provided at the left and right ends of the current collecting rod, and heat dissipation through holes are provided at the front and rear sides of the battery housing.

[0013] As a preferred technical solution of the utility model, the anode and the cathode are connected inside the battery casing by a snap-on method, the positive terminal is connected to the battery cover by a snap-on method, the battery cover is connected to the battery casing by a threaded connection, and the hot and cold channels are connected to the battery casing by a snap-on method.

[0014] As a preferred technical solution of the utility model, the hot channel and the cold channel are connected to the battery housing by a snap-on manner, the isolation block is fixedly connected inside the hot and cold channels, the exhaust port and the air inlet are connected to the hot and cold channels by a snap-on manner, and the air guide plate is snap-on inside the cold channel.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a lithium-ion battery with good cell temperature uniformity, which has the following beneficial effects:

[0017] The lithium-ion battery with good cell temperature uniformity realizes zoning control of heat through the use of a temperature uniformity channel structure and the combined use of a hot channel and a cold channel. At the same time, the exhaust port can promptly discharge the heat accumulated inside the battery, while the air inlet at the bottom of the cold channel allows external cold air to enter. Guided by the air guide plate, the cold air can flow evenly through the battery casing, effectively reducing the temperature of the cell, achieving uniform distribution of the cell temperature, and improving the performance and safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 2 It is a side schematic diagram of the structure of the utility model;

[0020] Figure 3 It is a front view of the structure of the utility model.

[0021] In the figure: 1. battery casing; 2. anode; 3. cathode; 4. current collecting rod; 5. positive terminal; 6. battery cover; 7. hot and cold channels; 8. hot channel; 9. cold channel; 10. isolation block; 11. exhaust port; 12. air inlet; 13. air guide plate; 14. isolation layer; 15. insulating sheet; 16. heat dissipation hole. DETAILED DESCRIPTION

[0022] 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.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-3 , a lithium-ion battery with good cell temperature uniformity, comprising a lithium-ion battery structure, and a temperature uniformity channel structure is arranged outside the lithium-ion battery structure;

[0026] Embodiment 1: The lithium-ion battery structure includes a battery shell 1, an anode 2 is provided on the upper and lower sides of the inner wall of the battery shell 1, a cathode 3 is provided on the other side of the battery shell 1, a current collector 4 is provided between the cathodes 3 on the upper and lower sides, a positive terminal 5 is provided on the left side of the current collector 4, a battery cover 6 is provided at the connection between the positive terminal 5 and the battery shell 1, and a hot and cold channel 7 is provided on the top of the battery shell 1; wherein, the battery shell 1 is used to accommodate and protect all components inside the battery to ensure the safety and stability of the battery; the anode 2 is the positive electrode of the lithium-ion battery, which is the place where the oxidation reaction occurs in the battery and is responsible for releasing lithium ions; the cathode 3 is the negative electrode of the lithium-ion battery, which is the place where the reduction reaction occurs in the battery and is responsible for receiving lithium ions; the current collector 4 is used to collect the current inside the battery and transmit it to the external circuit to ensure the effective flow of the current; the positive terminal 5 is the positive electrode interface where the battery is connected to the external circuit, which is the place where the current flows out; the battery cover 6 protects the positive terminal 5 and prevents external impurities from entering the battery, while ensuring the sealing of the battery structure; the hot and cold channel 7 is used to control the temperature of the battery to ensure that the battery operates within the optimal temperature range.

[0027] It should be noted that: the anode 2 and the cathode 3 are connected to the inside of the battery housing 1 by a snap-fitting manner, the positive terminal 5 is connected to the battery cover 6 by a snap-fitting manner, the battery cover 6 is connected to the battery housing 1 by a threaded connection, and the hot and cold channel 7 is connected to the battery housing 1 by a snap-fitting manner.

[0028] In this embodiment, an isolation layer 14 is provided at the connection between the anode 2 and the cathode 3, an insulating sheet 15 is provided at the left and right ends of the current collecting rod 4, and heat dissipation holes 16 are provided on the front and back sides of the battery casing 1; wherein, the isolation layer 14 is located between the anode 2 and the cathode 3 to prevent direct contact between the two, thereby ensuring the safety and stability of the battery; the insulating sheet 15 is used to prevent electrical contact between the current collecting rod 4 and other components, thereby ensuring the safety of the battery; the heat dissipation holes 16 are used to increase the heat dissipation area of ​​the battery casing 1 and improve the heat dissipation efficiency of the battery.

[0029] Embodiment 2: The temperature-averaging channel structure also includes a hot channel 8 located in the middle of the upper and lower sides of the hot and cold channels 7, cold channels 9 are provided on the left and right sides of the hot channel 8, and an isolation block 10 is provided at the connection between the hot channel 8 and the cold channel 9; wherein the hot channel 8 is used to guide the flow of heat and export the heat inside the battery; the cold channel 9 is used to introduce cold air to cool the battery and reduce the battery temperature; the isolation block 10 is located between the hot channel 8 and the cold channel 9 to prevent heat from being transferred between the two, thereby ensuring the independence of the hot and cold channels.

[0030] It should be noted that the hot channel 8 and the cold channel 9 are connected to the battery housing 1 in a snap-fit ​​manner, and the isolation block 10 is fixedly connected inside the hot and cold channels 7 .

[0031] In this embodiment, an exhaust port 11 is provided on the right side of the top of the hot channel 8, an air inlet 12 is provided on the left and right sides of the bottom of the cold channel 9, and an air guide plate 13 is provided on the side of the cold channel 9 close to the battery housing 1; wherein, the exhaust port 11 is used to discharge the hot air in the hot channel 8 to the outside of the battery to maintain the patency of the hot channel; the air inlet 12 is used to introduce external cold air into the cold channel 9 to provide a cooling effect for the battery; the air guide plate 13 is inside the cold channel 9 to guide the flow of cold air to ensure that the cold air can flow evenly through the battery housing 1 to improve the cooling effect.

[0032] It should be noted that the air outlet 11 and the air inlet 12 are connected to the hot and cold channels 7 in a snap-fit ​​manner, and the air guide plate 13 is snap-fitted inside the cold channel 9 .

[0033] The working principle of the above embodiment is:

[0034] See also Figure 1-3During the use of the utility model, first, during the charging process, lithium ions are deintercalated from the anode 2 and embedded into the cathode 3 through the electrolyte, and heat is generated inside the battery. In addition, the temperature-averaging channel structure is activated, and external cold air is introduced through the air inlet 12. After being guided by the cold channel 9 and the air guide plate 13, the cold air flows evenly through the battery housing 1 to reduce the battery temperature. At the same time, the hot air in the hot channel 8 is discharged to the outside of the battery through the exhaust port 11 to maintain the patency of the hot channel. The discharge process is opposite to the charging process. Lithium ions are deintercalated from the cathode 3 and embedded into the anode 2. At the same time, heat is generated inside the battery, and the thermal management system will also perform cooling.

[0035] Beneficial effects of the above embodiments:

[0036] The lithium-ion battery with good cell temperature uniformity realizes zoning control of heat by using a temperature uniformity channel structure and combining the hot channel 8 with the cold channel 9. At the same time, the exhaust port 11 can timely discharge the heat accumulated inside the battery, while the air inlet 12 at the bottom of the cold channel 9 allows external cold air to enter. Under the guidance of the air guide plate 13, the cold air can flow evenly through the battery housing 1, effectively reducing the temperature of the cell, realizing uniform distribution of the cell temperature, and improving the performance and safety of the battery.

[0037] 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-ion battery with good cell temperature uniformity, comprising a lithium-ion battery structure, wherein a temperature uniformity channel structure is arranged outside the lithium-ion battery structure; Features: The lithium-ion battery structure comprises a battery shell (1), wherein an anode (2) is provided on the upper and lower sides of the inner wall of the battery shell (1), a cathode (3) is provided on the other side of the anode (2) and the battery shell (1), a current collecting rod (4) is provided between the cathodes (3) on the upper and lower sides, a positive terminal (5) is provided on the left side of the current collecting rod (4), a battery cover (6) is provided at the connection between the positive terminal (5) and the battery shell (1), and a hot and cold channel (7) is provided on the top of the battery shell (1).

2. A lithium-ion battery with good cell temperature uniformity according to claim 1, characterized in that: The temperature-averaging channel structure comprises a hot channel (8) located in the middle of the upper and lower sides of the hot and cold channels (7), cold channels (9) are arranged on the left and right sides of the hot channel (8), and an isolation block (10) is arranged at the connection between the hot channel (8) and the cold channel (9).

3. A lithium-ion battery with good cell temperature uniformity according to claim 2, characterized in that: An exhaust port (11) is provided on the right side of the top of the hot channel (8), air inlets (12) are provided on the left and right sides of the bottom of the cold channel (9), and an air guide plate (13) is provided on one side of the cold channel (9) close to the battery housing (1).

4. A lithium-ion battery with good cell temperature uniformity according to claim 1, characterized in that: An isolation layer (14) is provided at the connection between the anode (2) and the cathode (3), insulating sheets (15) are provided at the left and right ends of the current collecting rod (4), and heat dissipation through holes (16) are provided at the front and rear sides of the battery housing (1).

5. A lithium-ion battery with good cell temperature uniformity according to claim 1, characterized in that: The anode (2) and the cathode (3) are connected to the inside of the battery housing (1) by means of a snap connection, the positive terminal (5) is connected to the battery cover (6) by means of a snap connection, the battery cover (6) is connected to the battery housing (1) by means of a threaded connection, and the hot and cold channel (7) is connected to the battery housing (1) by means of a snap connection.

6. A lithium-ion battery with good cell temperature uniformity according to claim 3, characterized in that: The hot channel (8) and the cold channel (9) are connected to the battery housing (1) in a snap-fit ​​manner, the isolation block (10) is fixedly connected inside the hot and cold channels (7), the air outlet (11) and the air inlet (12) are connected to the hot and cold channels (7) in a snap-fit ​​manner, and the air guide plate (13) is snap-fitted inside the cold channel (9).

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