A lithium battery pack with active cooling capability

Abstract

This utility model relates to the field of lithium battery packs, and more particularly to an actively cooling lithium battery pack; it includes: a shell and a top cover; wherein, the shell is provided with an electrical compartment, a drain compartment, and a battery compartment; the battery compartment houses a cell module; a heat pipe is provided inside the shell, located inside the battery compartment and connected to the drain compartment; this utility model, by setting up a drain compartment and applying thermally conductive sealant at the wiring positions, provides a relatively independent working environment for the battery management system, avoiding the impact of heat on electrical components, and improving the convenience of subsequent battery maintenance and replacement of electrical components. The cell module is installed close to the heat pipe, and an external coolant unit pressurizes low-temperature coolant into the heat pipe. Heat exchange occurs through the contact between the inner wall surface of the heat pipe and the flowing coolant. Utilizing the thermal conductivity of the heat pipe improves the heat dissipation and temperature uniformity of the battery system, increasing the service life and efficiency of the lithium battery pack.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery packs, and in particular to a lithium battery pack with active cooling capability. Background Technology

[0002] Battery packs typically have higher energy density and power density, enabling them to provide higher output current and power. Because lithium battery packs often require high overload operation, they generate a lot of heat inside the pack, and the core cells within the pack heat up quickly, resulting in uneven temperature distribution. Therefore, it is necessary to optimize the design of the battery pack structure to maintain a balanced temperature within the battery pack during operation, ensure charging and discharging efficiency, and improve energy utilization. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a lithium battery pack with active cooling capability.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A lithium battery pack capable of active cooling is provided, comprising: a housing with an opening at the top and a top cover disposed at the top of the housing;

[0006] The shell includes an electrical compartment, a drain compartment, and a battery compartment; the battery compartment contains a battery cell module; and the shell contains a heat pipe located inside the battery compartment and connected to the drain compartment.

[0007] Preferably, the electrical compartment is equipped with a BMS battery management system, which is connected to the battery cell module via a connecting harness.

[0008] Preferably, the drain chamber is located between the electrical compartment and the battery compartment, thus isolating the electrical compartment and the battery compartment.

[0009] Preferably, a sealing ring is provided between the housing and the top cover.

[0010] Preferably, thermally conductive sealant is provided at the connection points between the heat-conducting pipe and the battery compartment and the drain compartment.

[0011] Preferably, the two ends of the housing are respectively provided with a coolant inlet and a coolant outlet.

[0012] Preferably, the upper cover is provided with an explosion-proof vent valve.

[0013] The utility model adopts the above technical solution and has the following technical effects compared with the prior art:

[0014] This invention protects the electrical components of the Battery Management System (BMS) by incorporating a drain chamber and applying thermally conductive sealant to the wiring locations. This provides the BMS with a relatively independent operating environment, preventing heat from affecting the electrical components and improving the ease of subsequent maintenance and component replacement, thus enhancing the practicality of the lithium battery pack. The cell modules are installed close to the heat pipes, which transfer heat generated during cell operation. An external coolant unit pressurizes low-temperature coolant into the heat pipes, and heat exchange occurs through the contact between the inner wall of the heat pipes and the flowing coolant. The heat conduction capacity of the heat pipes improves the battery system's heat dissipation and temperature uniformity, increasing the lifespan and efficiency of the lithium battery pack. All heat pipe connections are installed using welding, ensuring the overall sealing of the battery compartment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the basic internal structure of an actively cooling lithium battery pack according to one embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the basic internal structure of an actively cooling lithium battery pack according to another perspective in one embodiment of the present invention.

[0017] Figure 3 This is an overall diagram of a lithium battery pack capable of active cooling in one embodiment of the present invention.

[0018] The reference numerals in the figure include:

[0019] Electrical compartment 1; Drainage compartment 2; Battery compartment 3; Battery cell module 4; Heat pipe 5; Sealing ring 6; Thermal sealant 7; Connecting harness 8; BMS battery management system 9; Top cover 10; Explosion-proof vent valve 11; Coolant inlet 12; Coolant outlet 13. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0023] Example 1

[0024] This embodiment provides an actively cooling lithium battery pack, including: a shell with an opening at the top and a top cover 10 disposed at the top of the shell; a sealing ring 6 is provided between the shell and the top cover 10, and the sealing ring 6 is installed at the connection contact position of the electrical compartment 1, the drain compartment 2, the battery compartment 3 and the top cover 10; a coolant inlet 12 and a coolant outlet 13 are respectively provided at both ends of the shell; and an explosion-proof vent valve 11 is provided on the top cover 10.

[0025] The housing includes an electrical compartment 1, a drain compartment 2, and a battery compartment 3. The electrical compartment 1 houses a battery management system (BMS) 9. The battery compartment 3 houses a battery cell module 4. The BMS 9 and the battery cell module 4 are connected via a wiring harness 8. After connection, thermally conductive sealant 7 is applied to the connection points between the heat pipe 5 and the drain compartment 2 and battery compartment 3. The drain compartment 2 is located between the electrical compartment 1 and the battery compartment 3, acting as a barrier between them. A heat pipe 5 is located within the housing, within the battery compartment 3, and connected to the drain compartment 2.

[0026] The working principle is as follows:

[0027] When the internal lithium battery generates heat, the heat pipe 5 can evenly distribute the temperature of the cell module 4, ensuring that localized high temperatures do not affect battery efficiency during operation. Simultaneously, the heat pipe 5 uses a low-temperature coolant to cool the battery interior, dissipating the heat generated by the cell module 4 and improving the battery pack's heat dissipation efficiency. The electrical components of the BMS (Battery Management System) 9 are isolated from the battery module 4, eliminating the impact of heat generated by the cell module 4 on the BMS 9. This improves the efficiency of the BMS 9 and enhances the convenience of future maintenance and component replacement.

[0028] In summary, this invention protects the electrical components of the BMS (Battery Management System) by incorporating a drain chamber and applying thermally conductive sealant to the wiring locations. This provides the BMS with a relatively independent operating environment, preventing heat from affecting the electrical components and improving the ease of subsequent maintenance and component replacement, thus enhancing the practicality of the lithium battery pack. The cell modules are installed close to the heat pipes, and the contact between the heat pipes and the cell modules transfers the heat generated during cell operation. An external coolant unit pressurizes low-temperature coolant into the heat pipes, and heat exchange occurs through the contact between the inner wall of the heat pipes and the flowing coolant. The heat conduction capacity of the heat pipes improves the heat dissipation and temperature uniformity of the battery system, increasing the lifespan and efficiency of the lithium battery pack. All heat pipe connections are installed using welding, ensuring the overall sealing effect of the battery compartment.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lithium battery pack with active cooling capability, characterized in that, include: A shell with an opening at the top and a top cover (10) disposed at the top of the shell; The shell is provided with an electrical compartment (1), a drain compartment (2) and a battery compartment (3); the battery compartment (3) is provided with a battery cell module (4); the shell is provided with a heat pipe (5), which is located in the battery compartment (3) and connected to the drain compartment (2).

2. The lithium battery pack according to claim 1, characterized in that, The electrical compartment (1) is equipped with a BMS battery management system (9), which is connected to the cell module (4) via a connecting harness (8).

3. The lithium battery pack according to claim 1, characterized in that, The drain chamber (2) is located between the electrical compartment (1) and the battery compartment (3), thus isolating the electrical compartment (1) and the battery compartment (3).

4. The lithium battery pack according to claim 1, characterized in that, A sealing ring (6) is provided between the housing and the top cover (10).

5. The lithium battery pack according to claim 1, characterized in that, Thermally conductive sealant (7) is provided at the connection points between the heat pipe (5) and the battery compartment (3) and the drain compartment (2).

6. The lithium battery pack according to claim 1, characterized in that, The housing has a coolant inlet (12) and a coolant outlet (13) at its two ends, respectively.

7. The lithium battery pack according to claim 1, characterized in that, The upper cover (10) is equipped with an explosion-proof vent valve (11).

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