Battery tray structure with double heat dissipation and capable of balancing system temperature difference and method

Abstract

The invention belongs to the technical field of battery system cooling, and particularly relates to a battery tray structure and method with double heat dissipation and capable of balancing system temperature difference, the battery tray structure comprises a cooling oil tank, a partition plate is fixedly mounted on the inner surface of the cooling oil tank, and a heat exchange mechanism is fixedly mounted at the bottom of the cooling oil tank; the heat exchange mechanism comprises a liquid cooling guide plate, the top of the liquid cooling guide plate is fixedly connected with the bottom of the cooling oil tank, and a liquid cooling groove is formed in the top of the liquid cooling guide plate. According to the battery tray structure with the dual heat dissipation function and the system temperature difference balancing function and the method, cooling oil is poured into the cooling oil tank, then the battery cells are fixed into the cooling oil tank, the battery cells are immersed in the cooling oil, and then the cover plate of the cooling oil tank is covered and sealed, so that heat generated when the battery cells work can be transferred into the cooling oil; then the liquid inlet and outlet is sleeved with a hose communicated with cooling liquid circulating equipment, and cooling liquid is injected into a liquid cooling groove in the liquid cooling guide plate from the liquid inlet and outlet through the hose.

Description

Technical Field

[0001] The present invention relates to the technical field of battery system cooling, and particularly relates to a battery tray structure and method with dual heat dissipation for balancing system temperature difference. Background Art

[0002] With the development of the electric vehicle industry, lithium-ion batteries, as the power source of the electric vehicle industry, are also widely used in the automotive industry. As a result, the requirements for the performance of lithium-ion batteries are getting higher and higher, and there are many factors affecting the performance of lithium-ion batteries.

[0003] Currently, automotive batteries are usually placed on a tray and cooled by circulating coolant for temperature control. However, the following problems exist in actual operation:

[0004] In existing battery systems, a liquid cooling structure integrated at the bottom of the tray is mainly adopted. The heat generated by the battery cells is transferred to the liquid cooling plate through thermal conductive glue at the bottom, and then the heat is carried away by the medium in the liquid cooling plate. Only a small part of the generated heat can be carried away through this structure, and there are still extremely high points and extremely low points in the battery module. The uneven temperature greatly reduces the life of the battery. To address this, a battery tray and technical method with dual heat dissipation for balancing system temperature difference in a battery system are proposed to achieve uniform temperature in the battery system while meeting external heat dissipation requirements. Summary of the Invention

[0005] In order to overcome the defects of the existing technology pointed out above, the inventors of the present invention have conducted in-depth research and completed the present invention after a large amount of creative work.

[0006] Specifically, the technical problem to be solved by the present invention is: to provide a battery tray structure and method with dual heat dissipation for balancing system temperature difference to solve the current technical problems.

[0007] To solve the above technical problems, the present invention provides the following technical solutions:

[0008] A battery tray structure and method with dual heat dissipation for balancing system temperature difference, including a cooling oil tank, a partition is fixedly installed on the inner surface of the cooling oil tank, and a heat exchange mechanism is fixedly installed at the bottom of the cooling oil tank;

[0009] The heat exchange mechanism includes a liquid cooling diversion plate, the top of the liquid cooling diversion plate is fixedly connected to the bottom of the cooling oil tank, and a liquid cooling groove is opened at the top of the liquid cooling diversion plate.

[0010] As an improved technical solution, the heat exchange mechanism further includes an extension plate, the left side of the extension plate is fixedly connected to the left side of the cooling oil tank, and an inlet and outlet for liquid is communicated at the top of the extension plate.

[0011] A battery tray, steps of the double heat dissipation method for balancing system temperature difference:

[0012] S1. Pour cooling oil into the cooling oil tank;

[0013] S2. Place the battery cells into the cooling oil tank filled with cooling oil, and immerse the battery cells in the cooling oil;

[0014] S3. Connect the liquid inlet and outlet to an external circulation pump through a hose, and inject coolant into it;

[0015] S4. The coolant circulates and flows in the liquid cooling grooves within the liquid cooling guide plate;

[0016] S5. After the battery cells generate heat, the temperature is balanced through the conduction of the cooling oil in the cooling oil tank;

[0017] S6. Through the circulating flow of the coolant in the cooling grooves, the heat transferred to the liquid cooling guide plate by the cooling oil is exchanged with the outside.

[0018] After adopting the above technical solutions, the beneficial effects of the present invention are:

[0019] 1. By adding a design for balancing the temperature of the battery cells in the battery system, through the combined use of the cooling oil tank, the liquid cooling guide plate, the liquid inlet and outlet, and the liquid cooling grooves, the cooling oil in the cooling oil tank greatly balances the highest and lowest points of the temperature of the battery cells in the battery system, effectively extending the life of the battery cells, reducing the system cost, and at the same time reducing the risk of thermal runaway caused by abnormal temperature.

[0020] 2. By adding a design for controlling the battery temperature rise rate, through the combined use of the cooling oil tank, the liquid cooling guide plate, the liquid inlet and outlet, and the liquid cooling grooves, the heat transferred in the cooling oil is transferred out by the flow of the coolant, so that the temperature difference of the battery pack is smaller and the temperature rise is lower, extending the service life of the entire battery pack. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the battery tray structure and method with double heat dissipation for balancing system temperature difference of the present invention.

[0023] Figure 2Schematic diagram of the liquid cooling deflector and the liquid cooling tank three-dimensional structure of the battery tray structure and method with dual heat dissipation for balancing the system temperature difference according to the present invention.

[0024] Figure 3 Partial sectional view structure diagram of the cooling fuel tank of the battery tray structure and method with dual heat dissipation for balancing the system temperature difference according to the present invention

[0025] Description of the reference numerals:

[0026] 1. Cooling fuel tank; 2. Partition board; 3. Heat exchange mechanism; 31. Liquid cooling deflector; 32. Liquid cooling tank; 33. Extension plate; 34. Liquid inlet and outlet. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously.

[0030] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Such as Figure 1 、 Figure 2 and Figure 3As shown together, this embodiment provides a battery tray structure and method with dual heat dissipation and capable of balancing the system temperature difference. This battery tray structure and method with dual heat dissipation and capable of balancing the system temperature difference includes a cooling oil tank 1, a partition 2 is fixedly installed on the inner surface of the cooling oil tank 1, and a heat exchange mechanism 3 is fixedly installed at the bottom of the cooling oil tank 1;

[0032] The heat exchange mechanism 3 includes a liquid cooling diversion plate 31, the top of the liquid cooling diversion plate 31 is fixedly connected to the bottom of the cooling oil tank 1, and a liquid cooling groove 32 is opened at the top of the liquid cooling diversion plate 31.

[0033] The partition 2 functions to separate the dry and wet areas, separates the electrical components from the battery compartment, effectively utilizes the space, and at the same time reduces the amount of cooling oil used. The partition 2 can also manage the cooling oil tank 1 in zones and reduce the risk of cooling oil leakage.

[0034] As Figure 1 、 Figure 2 and Figure 3 As shown together, the heat exchange mechanism 3 further includes an extension plate 33, the left side of the extension plate 33 is fixedly connected to the left side of the cooling oil tank 1, and a liquid inlet and outlet 34 is communicated with the top of the extension plate 33.

[0035] The liquid inlet and outlet 34 is welded to the extension plate 33, and the cooling oil tank 1 and the liquid cooling diversion plate 31 are connected by welding.

[0036] Steps of a method for a battery tray with dual heat dissipation and capable of balancing the system temperature difference:

[0037] S1. Pour cooling oil into the cooling oil tank;

[0038] S2. Place the battery cells into the cooling oil tank filled with cooling oil and immerse the battery cells in the cooling oil;

[0039] S3. Connect the liquid inlet and outlet to an external circulation pump through a hose and inject coolant into it;

[0040] S4. The coolant circulates and flows in the liquid cooling groove in the liquid cooling diversion plate;

[0041] S5. After the battery cells generate heat, the temperature is equalized through the conduction of the cooling oil in the cooling oil tank;

[0042] S6. Through the circulating flow of the coolant in the cooling groove, the heat transferred to the liquid cooling diversion plate by the cooling oil is exchanged with the outside.

[0043] In use, the operator first pours cooling oil into the cooling oil tank 1, then fixes the battery cell into the cooling oil tank 1, immerses the battery cell in the cooling oil, then covers the cover plate of the cooling oil tank 1 to make it sealed, so that the heat generated when the battery cell works can be transferred to the cooling oil. Then, the liquid inlet and outlet 34 is sleeved with a hose communicated with the coolant circulation device, and the coolant is injected into the liquid cooling tank 32 in the liquid cooling guide plate 31 through the hose, and circulates in the liquid cooling tank 32, transfers the heat transferred by the cooling oil to the coolant, and takes it out for heat exchange.

[0044] It should be understood that the use of these embodiments is only for illustrating the present invention rather than intending to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A battery tray structure and method with dual heat dissipation for balancing system temperature difference, including a cooling fuel tank (1), characterized in that: A partition plate (2) is fixedly installed on the inner surface of the cooling fuel tank (1), and a heat exchange mechanism (3) is fixedly installed at the bottom of the cooling fuel tank (1); The heat exchange mechanism (3) includes a liquid cooling guide plate (31), the top of the liquid cooling guide plate (31) is fixedly connected to the bottom of the cooling fuel tank (1), and a liquid cooling groove (32) is formed at the top of the liquid cooling guide plate (31).

2. The battery tray structure and method with dual heat dissipation for balancing the temperature difference of the system according to claim 1, characterized in that: The heat exchange mechanism (3) further includes an extension plate (33), the left side of the extension plate (33) is fixedly connected to the left side of the cooling fuel tank (1), and a liquid inlet and outlet (34) is communicated with the top of the extension plate (33).

3. A battery tray, characterized in that: Steps of the dual heat dissipation method for balancing the system temperature difference according to any one of claims 1-2: S1. Pour cooling oil into the cooling fuel tank. S2. Place the battery cell into the cooling fuel tank filled with cooling oil, and immerse the battery cell in the cooling oil. S3. Connect the liquid inlet and outlet to an external circulation pump through a hose, and inject coolant into it. S4. The coolant circulates and flows in the liquid cooling groove in the liquid cooling guide plate. S5. After the battery cell generates heat, the heat is conducted through the cooling oil in the cooling fuel tank to achieve uniform temperature. S6. Through the circulating flow of the coolant in the cooling groove, the heat transferred from the cooling oil to the liquid cooling guide plate is exchanged with the outside.

Images