Immersed liquid-cooled battery pack

Abstract

The utility model discloses an immersed liquid-cooled battery pack which comprises a battery module arranged in a battery shell, and an upper shell condenser is arranged at the top of the battery shell; the battery shell is filled with phase change cooling liquid, and the battery module is soaked in the phase change cooling liquid. According to the utility model, the battery module is soaked in the phase change cooling liquid, so that the battery module is instantly and comprehensively cooled, the heat dissipation area is effectively enlarged, and the heat dissipation is uniform; an upper shell condenser at the top of the battery shell is combined, and the upper shell condenser is used for dissipating heat; and meanwhile, the upper shell condenser can be used for cooling the phase change cooling liquid so as to liquefy and reflow, the heat dissipation efficiency is improved, and the heat dissipation mode is more efficient.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to an immersion liquid-cooled battery pack. Background Technology

[0002] With the widespread adoption of fast charging and high-rate discharging applications, the rate capability requirements for battery packs are becoming increasingly stringent. Abnormal temperatures directly impact battery pack performance and safety, making effective heat dissipation methods increasingly crucial. However, current battery pack cooling methods generally employ natural cooling or conventional liquid cooling. Natural cooling relies on natural airflow, offering simplicity, low cost, and small footprint, but suffers from low heat dissipation efficiency and is unsuitable for high-power discharge conditions. Liquid cooling is the most widely used and researched method in the industry. By arranging cooling plates at or around the bottom of the battery, heat exchange between the battery and the coolant is achieved. Liquid media boasts a high heat transfer coefficient, large heat capacity, and rapid cooling speed, effectively improving the temperature field uniformity of the battery pack. However, due to the limited contact area between the bottom cooling plate and the battery, the temperature difference between individual cells remains significant, affecting battery performance. Therefore, heat dissipation efficiency remains low, and heat dissipation is uneven. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing an immersion liquid-cooled battery pack. By immersing the battery module in a phase change coolant, the battery module is instantly and comprehensively cooled, effectively expanding the heat dissipation area and ensuring uniform heat dissipation. Furthermore, combined with the upper shell condenser on the top of the battery casing, the upper shell condenser itself dissipates heat. At the same time, the upper shell condenser can also be used to cool the phase change coolant and then liquefy and reflux it, improving the heat dissipation efficiency and making the heat dissipation method more efficient.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an immersion liquid-cooled battery pack, characterized in that: it includes a battery module disposed inside a battery casing; an upper shell condenser is disposed on the top of the battery casing; the battery casing and the upper shell condenser are connected by sealant; the battery casing is filled with phase change coolant, and the battery module is immersed in the phase change coolant; a positive terminal connector and a negative terminal connector are also disposed on one side of the battery casing; the positive terminal connector and the negative terminal connector are symmetrically disposed on the battery casing, and both the positive terminal connector and the negative terminal connector penetrate into the battery casing and are connected to the battery module; a battery management module connected to the battery module is also disposed on the battery casing.

[0005] The above-mentioned immersion liquid-cooled battery pack is characterized in that: the upper shell condenser includes a condenser tube horizontally disposed on the top of the battery shell and upper shell fins disposed on the condenser tube, the condenser tube and the upper shell fins being integrally formed; the condenser tube is arranged in a serpentine manner on the top of the battery shell, one end of the condenser tube is a liquid inlet, and the other end of the condenser tube is a liquid outlet.

[0006] The above-mentioned immersion liquid-cooled battery pack is characterized in that: the battery module is composed of multiple battery packs connected in series, and there is a gap between two adjacent battery packs.

[0007] The above-mentioned immersion liquid-cooled battery pack is characterized in that: a communication connector is also provided on the battery casing.

[0008] This utility model has the following advantages compared with the prior art:

[0009] 1. This utility model achieves instant and comprehensive cooling of the battery module by immersing it in phase change coolant, effectively expanding the heat dissipation area and ensuring uniform heat dissipation; and combined with the upper shell condenser on the top of the battery casing, the heat dissipation method is more efficient.

[0010] 2. In this utility model, an upper shell condenser is provided on the top of the battery casing to dissipate heat; at the same time, the upper shell condenser can also be used to cool the phase change coolant and then liquefy and reflux it, thereby improving the heat dissipation efficiency.

[0011] In summary, this utility model achieves immediate and comprehensive cooling of the battery module by immersing it in phase change coolant, effectively expanding the heat dissipation area and ensuring uniform heat dissipation. Furthermore, by combining the upper shell condenser on the top of the battery casing, heat dissipation is utilized through the upper shell condenser itself. At the same time, the upper shell condenser can also be used to cool the phase change coolant and then liquefy and reflux it, improving heat dissipation efficiency and making the heat dissipation method more efficient.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 Exploded view.

[0015] Figure 3 This is a schematic diagram showing the connection between the upper shell condenser and the battery casing of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1—Battery casing; 3—Battery module; 4—Upper casing condenser;

[0018] 4-1—Condenser tube; 4-2—Upper shell fins; 5—Battery pack positive terminal connector;

[0019] 6—Communication connector; 7—Battery management module; 8—Battery pack negative connector. Detailed Implementation

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model includes a battery module 3 disposed inside a battery casing 1. An upper casing condenser 4 is disposed on the top of the battery casing 1, and the battery casing 1 and the upper casing condenser 4 are connected by sealant. The battery casing 1 is filled with phase change coolant, and the battery module 3 is immersed in the phase change coolant. A positive battery pack connector 5 and a negative battery pack connector 8 are also disposed on one side of the battery casing 1. The positive and negative battery pack connectors 5 and 8 are symmetrically arranged on the battery casing 1, and both connectors penetrate into the battery casing 1 and connect to the battery module 3. A battery management module 7 connected to the battery module 3 is also disposed on the battery casing 1.

[0021] In actual use, by immersing the battery module 3 in the phase change coolant, the battery module 3 can be cooled instantly and comprehensively, effectively expanding the heat dissipation area and ensuring uniform heat dissipation; and combined with the upper shell condenser 4 on the top of the battery casing 1, the heat dissipation method is more efficient.

[0022] By providing an upper shell condenser 4 on the top of the battery casing 1, heat dissipation is achieved through the upper shell condenser 4 itself; at the same time, the upper shell condenser 4 can also be used to cool the phase change coolant and then liquefy and reflux it, thereby improving the heat dissipation efficiency.

[0023] It should be noted that the phase change coolant is a fluorinated liquid. When the battery temperature reaches a certain value, the surrounding fluorinated liquid reaches its boiling point and vaporizes to the top of the battery casing 1. After contacting the top upper casing condenser 4, it is cooled and then liquefied, flowing back into the battery casing 1. The upper casing condenser 4 has heat dissipation channels inside and outside, arranged vertically. The upper casing condenser 4 is located on the top of the battery casing 1, allowing for heat dissipation both through the condenser 4 itself and through the internal channels. The battery management module 7, or BMU, is mainly responsible for the management and monitoring of the battery module 3.

[0024] like Figure 3As shown, in this embodiment, the upper shell condenser 4 includes a condenser tube 4-1 horizontally disposed on the top of the battery casing 1 and an upper shell fin 4-2 disposed on the condenser tube 4-1. The condenser tube 4-1 and the upper shell fin 4-2 are integrally formed. The condenser tube 4-1 is arranged in a serpentine manner on the top of the battery casing 1. One end of the condenser tube 4-1 is a liquid inlet, and the other end of the condenser tube 4-1 is a liquid outlet.

[0025] In this embodiment, the battery module 3 is composed of multiple battery packs connected in series, with a gap between adjacent battery packs.

[0026] In actual use, the battery casing 1 has an end plate inside for fixing the battery module 3. The battery module 3 is fixed with screws at the corresponding fixing positions of the end plate and the battery casing 1.

[0027] like Figure 1 and Figure 2 As shown in this embodiment, a communication connector 6 is also provided on the battery casing 1.

[0028] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An immersion liquid-cooled battery pack, characterized by: The battery module (3) is installed inside a battery casing (1). A top shell condenser (4) is installed on the top of the battery casing (1). The battery casing (1) and the top shell condenser (4) are connected by sealant. The battery casing (1) is filled with phase change coolant, and the battery module (3) is immersed in the phase change coolant. A battery pack positive terminal connector (5) and a battery pack negative terminal connector (8) are also installed on one side of the battery casing (1). The battery pack positive terminal connector (5) and the battery pack negative terminal connector (8) are symmetrically arranged on the battery casing (1), and both the battery pack positive terminal connector (5) and the battery pack negative terminal connector (8) penetrate into the battery casing (1) and are connected to the battery module (3). A battery management module (7) connected to the battery module (3) is also installed on the battery casing (1).

2. The submerged liquid-cooled battery pack of claim 1, wherein: The upper shell condenser (4) includes a condenser tube (4-1) horizontally arranged on the top of the battery shell (1) and upper shell fins (4-2) arranged on the condenser tube (4-1). The condenser tube (4-1) and the upper shell fins (4-2) are integrally formed. The condenser tube (4-1) is arranged in a serpentine pattern on the top of the battery shell (1). One end of the condenser tube (4-1) is a liquid inlet, and the other end of the condenser tube (4-1) is a liquid outlet.

3. The submerged liquid-cooled battery pack of claim 1, wherein: The battery module (3) is composed of multiple battery packs connected in series, with a gap between adjacent battery packs.

4. The submerged liquid-cooled battery pack of claim 1, wherein: The battery casing (1) is also provided with a communication connector (6).

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