Modularized liquid cooling lithium battery pack

Abstract

The utility model discloses a modularized liquid-cooled lithium battery pack, which belongs to the technical field of liquid-cooled lithium battery packs and comprises a bottom shell and a top shell, a cooling plate is fixedly connected onto the top shell, a wiring panel is fixedly connected onto the front sides of the bottom shell and the top shell, and two groups of cooling pipes are connected onto the cooling plate. Two liquid inlet connectors and a liquid outlet connector are further arranged on the wiring panel, and the liquid inlet connectors and the liquid outlet connector are connected to the two ends of the cooling pipes respectively. According to the utility model, the two groups of cooling pipes are arranged, the cross sections of the cooling pipes are rectangular, and the cooling pipes are arranged on the cooling plate in an S shape, so that heat generated in the working process of the lithium battery can be taken away; and the lithium battery can continuously and stably work.

Description

Technical Field

[0001] This utility model relates to the field of liquid-cooled lithium battery pack technology, specifically a modular liquid-cooled lithium battery pack. Background Technology

[0002] During the hot summer months, the operating temperature of lithium batteries in a sealed battery box can reach 70°C, far exceeding the maximum operating temperature of lithium batteries. At high temperatures, the charging and discharging efficiency of lithium batteries is greatly reduced, with the discharge time less than half that at room temperature. Simultaneously, high temperatures accelerate the irreversible capacity decay of lithium batteries, shortening their lifespan. In more severe cases, high temperatures can cause lithium batteries to catch fire and be destroyed. Lithium batteries operate in harsh environments; some are installed in containers and placed outdoors. In hot summers, the internal temperature of lithium batteries can reach 70°C. Using air conditioning for cooling would be energy-intensive and costly. In limited spaces, to save space, lithium batteries have very compact structures, and there is insufficient space between cells and modules for heat dissipation. This prevents the temperature inside the battery box from dissipating in time, causing the internal temperature to rise continuously.

[0003] Existing liquid-cooled lithium battery packs consist of a casing and internal lithium battery blocks. Multiple lithium battery blocks are connected in series to form a larger capacity lithium battery pack, which can provide power or store energy where needed. When the lithium battery is working, the temperature will rise. At this time, liquid cooling pipes are needed to contact the lithium battery to remove the heat generated on it, so that the lithium battery can work continuously and stably.

[0004] The above-mentioned technical conditions also have some defects: the liquid cooling pipe has an inlet end and an outlet end, which are located on both sides of the lithium battery pack. When the liquid passes through the inside of the liquid cooling pipe, it can carry away the heat generated by the lithium battery pack. However, the temperature of the coolant inside the liquid cooling pipe is relatively high near the outlet end, and the amount of heat it can carry away will be reduced. As a result, that part of the lithium battery cannot dissipate heat well, which reduces the performance of the lithium battery pack.

[0005] Based on this, the present invention designs a modular liquid-cooled lithium battery pack to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a modular liquid-cooled lithium battery pack to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a modular liquid-cooled lithium battery pack, comprising a bottom shell and a top shell, wherein a cooling plate is fixedly connected to the top shell, a wiring panel is fixedly connected to the front side of the bottom shell and the top shell, two sets of cooling pipes are connected to the cooling plate, and two liquid inlet connectors and one liquid outlet connector are provided on the wiring panel, wherein the liquid inlet connectors and the liquid outlet connectors are respectively connected to the two ends of the cooling pipes.

[0008] By adopting the above technical solutions, better heat dissipation can be achieved for lithium battery packs, thereby improving their performance.

[0009] Preferably, both sets of cooling pipes are provided with an inlet end and an outlet end, wherein the two inlet ends are respectively connected to two inlet connectors, and the two outlet ends are connected to one outlet connector.

[0010] By adopting the above technical solution, the distribution of cooling pipes is facilitated, and the space required for pipe installation is reduced.

[0011] Preferably, both sets of cooling pipes are arranged on the cooling plate in an S-shaped meandering manner.

[0012] By adopting the above technical solution, the contact area can be increased and the cooling effect can be improved.

[0013] Preferably, the cooling pipe has a rectangular pipe shape at the interface.

[0014] By adopting the above technical solution, the cooling effect of the cold zone can be improved through surface contact.

[0015] Preferably, the cooling pipe is formed by stamping on the cooling plate.

[0016] By adopting the above technical solution, molding is facilitated and the effectiveness of use is enhanced.

[0017] In summary, this application has the following beneficial technical effects: by setting two sets of cooling pipes with rectangular cross-sectional shapes and arranged in an S-shape on the cooling plate, the heat generated during the operation of the lithium battery can be carried away, enabling the lithium battery to operate continuously and stably. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0020] Figure 2 This is a schematic diagram of the front structure of this embodiment;

[0021] Figure 3 This is a schematic diagram of the wiring panel in this embodiment.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Bottom shell; 2. Top shell; 3. Cooling plate; 4. Wiring panel; 5. Cooling pipe; 51. Liquid inlet; 52. Liquid outlet; 6. Liquid inlet connector; 7. Liquid outlet connector. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0026] Reference Figure 1 and Figure 2 A modular liquid-cooled lithium battery pack includes a bottom shell 1 and a top shell 2, which are snapped together to form the outer shell of the battery pack. Multiple square lithium batteries are placed side by side inside the outer shell and then connected in series by wires. A cooling plate 3 is also fixedly connected to the top shell 2. A wiring panel 4 is fixedly connected to the front of the bottom shell 1 and the top shell 2. The wiring panel 4 is equipped with a rectifier and positive and negative terminals. The terminals are connected to the series-connected battery pack, enabling the battery pack to charge and discharge. Two sets of cooling pipes 5 are connected to the cooling plate 3. The cooling pipes 5 are formed by stamping on the cooling plate 3. The wiring panel 4 is also equipped with two liquid inlet connectors 6 and one liquid outlet connector 7. The liquid inlet connectors 6 and the liquid outlet connector 7 are respectively connected to the two ends of the cooling pipes 5 and can be connected to an external cooling circulation pipeline.

[0027] Furthermore, refer to Figure 2 Both sets of cooling pipes 5 are equipped with liquid inlet end 51 and liquid outlet end 52. The two liquid inlet ends 51 are connected to two liquid inlet connectors 6 respectively, and the two liquid outlet ends 52 are connected to one liquid outlet connector 7. The cooling effect of the battery pack can be improved by cooling the battery pack simultaneously through the two sets of cooling pipes 5.

[0028] Furthermore, both sets of cooling pipes 5 are arranged on the cooling plate 3 in an S-shaped meandering manner, which can increase the contact area of ​​liquid cooling and thus improve the cooling effect.

[0029] Furthermore, the cooling pipe 5 has a rectangular pipe shape, with its longer side contacting the battery pack, which increases the contact area with the battery and further improves the heat dissipation effect.

[0030] The implementation principle of this embodiment is as follows: When the workload of the lithium battery is large, two liquid inlet connectors 6 and one liquid outlet connector 7 can be connected to the liquid cooling pipeline. The circulating liquid inside the pipeline is driven by the cooling circulation equipment. When the coolant passes through the inside of the cooling pipe 5, it can carry away the heat generated during the operation of the lithium battery, thereby enabling the lithium battery to work continuously and stably. Then the coolant returns from the liquid outlet connector 7 and enters the cooling pipeline for cooling. After cooling is completed, subsequent cooling and temperature reduction are carried out.

[0031] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular liquid-cooled lithium battery pack, comprising a bottom shell (1) and a top shell (2), characterized in that: A cooling plate (3) is fixedly connected to the top shell (2). A wiring panel (4) is fixedly connected to the front side of the bottom shell (1) and the top shell (2). Two sets of cooling pipes (5) are connected to the cooling plate (3). Two liquid inlet connectors (6) and one liquid outlet connector (7) are also provided on the wiring panel (4). The liquid inlet connectors (6) and the liquid outlet connector (7) are respectively connected to the two ends of the cooling pipes (5).

2. The modular liquid-cooled lithium battery pack according to claim 1, characterized in that: Both sets of cooling pipes (5) are provided with an inlet end (51) and an outlet end (52), wherein the two inlet ends (51) are respectively connected to two inlet connectors (6), and the two outlet ends (52) are connected to an outlet connector (7).

3. A modular liquid-cooled lithium battery pack according to claim 1, characterized in that: Both sets of cooling pipes (5) are arranged on the cooling plate (3) in an S-shaped meandering manner.

4. A modular liquid-cooled lithium battery pack according to claim 1, characterized in that: The interface shape of the cooling pipe (5) is a rectangular pipe.

5. A modular liquid-cooled lithium battery pack according to claim 1, characterized in that: The cooling pipe (5) is formed by stamping on the cooling plate (3).

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