Battery pack cooling structure and battery pack with same
By designing multiple cooling areas and bent pipelines in the battery pack cooling structure, the problem of uneven temperature of the battery cell is solved, temperature equalization and temperature consistency of the battery cell is achieved, and the service life of the battery cell is extended.
Patent Information
- Application Number
- CN202420913319.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The existing battery pack cooling structure leads to unbalanced temperature of the battery cell, resulting in large temperature differences, and reducing the service life of the battery cell.
A battery pack cooling structure is designed, including a plurality of connected cooling areas, each cooling area is provided with at least one first pipeline and a second pipeline, and the second pipeline is located downstream of the first pipeline and close to the entry. In the direction of the liquid port, when the coolant flows through these pipelines, the bending design prevents the temperature from rising and ensures temperature equalization.
Through the bending design of multiple cooling areas, the cooling liquid temperature is prevented from rising continuously, the temperature equalization in the battery pack is achieved, the consistency of the battery cell temperature is improved, and the service life of the battery cell is extended.
Smart Images
Figure CN222214269U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery cooling, and in particular to a battery pack cooling structure and a battery pack having the same. Background Art
[0002] With the development of society, carbon neutrality has increasingly become the focus of people's attention, and energy storage technology is a key link in developing clean energy and realizing energy transformation. With the rapid growth of the global energy storage market, electrochemical energy storage has huge potential in the future.
[0003] In order to cool the battery pack, cooling pipes are generally arranged on the battery pack. In the prior art, the cooling pipes are generally arranged in an S shape on the battery pack. Then, according to the above arrangement, at the liquid inlet, the temperature of the coolant in the cooling pipe is relatively low, and through the exchange of heat, the temperature of the battery cells in the battery pack in this area will also be relatively low. As the coolant moves forward, the temperature of the coolant continues to increase, and the coolant can no longer perform good heat exchange for the battery pack. The above reasons will cause the temperature of the battery cell to be higher near the liquid outlet, and the temperature difference between the various areas inside the entire battery pack will be relatively large, which will greatly reduce the consistency of the battery cell and reduce the service life of the battery cell. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a battery pack cooling structure and a battery pack having the same, wherein the battery pack cooling structure can achieve a temperature balance effect in the battery pack and improve the temperature consistency of the battery cells.
[0005] The utility model provides a battery pack cooling structure, comprising a liquid inlet, a liquid outlet and a cooling channel connected between the liquid inlet and the liquid outlet, wherein the cooling channel comprises a plurality of cooling areas connected in sequence, and in each of the cooling areas, the cooling channel comprises at least one first pipeline and at least one second pipeline connected to the first pipeline, and along the flow direction of the coolant, the second pipeline is located downstream of the first pipeline, and in terms of the layout position, the second pipeline is closer to the liquid inlet than the first pipeline.
[0006] Furthermore, when the battery pack cooling structure is disposed on the battery pack, the liquid inlet and the liquid outlet are respectively disposed at two ends of the battery pack.
[0007] Furthermore, a third pipeline is also provided in the cooling area. Along the flow direction of the coolant, the first pipeline, the third pipeline and the second pipeline are connected in sequence. In terms of layout position, the third pipeline is farther away from the liquid inlet than the first pipeline.
[0008] Furthermore, a fourth pipeline is provided in the cooling area. Along the flow direction of the coolant, the fourth pipeline is located downstream of the second pipeline. In terms of layout position, the fourth pipeline is farther away from the liquid inlet than the second pipeline.
[0009] Furthermore, in terms of layout position, the fourth pipeline is arranged between the first pipeline and the third pipeline.
[0010] Furthermore, in the same cooling area, along the flow direction of the coolant, the first pipeline, the third pipeline, the second pipeline and the fourth pipeline are arranged in sequence, and in terms of layout position, from the liquid inlet to the liquid outlet, the second pipeline, the first pipeline, the fourth pipeline and the third pipeline are arranged in sequence.
[0011] Furthermore, in each of the cooling areas, there is at least one pipeline which is bent downward at the end so that when the battery pack cooling structure is installed on the battery pack, the bent portion of the pipeline contacts the side surface of the battery pack.
[0012] A first fixing plate is arranged between the two pipelines, and a second fixing plate is arranged on the liquid inlet and the liquid outlet. When the battery pack cooling structure is fixed on the battery pack, the first fixing plate and the second fixing plate are fixed on the side plate of the battery pack.
[0013] Furthermore, the battery pack cooling structure includes a thermally conductive gel. When the battery pack cooling structure is disposed on the battery pack, the cooling channel is fixed to the battery pack through the thermally conductive gel.
[0014] The utility model also provides a battery pack, comprising the above-mentioned battery pack cooling structure.
[0015] To sum up, in the present invention, through the setting of multiple cooling areas, in each cooling area, the cooling channel will bend backward, which can prevent the temperature of the coolant in the cooling channel from continuing to rise, so that the temperature in the battery pack can be balanced, and the temperature consistency of the battery cell can be improved.
[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 Shown is an axial structural schematic diagram of a battery pack cooling structure provided by the utility model installed on a battery pack from a first viewing angle.
[0018] Figure 2 Shown Figure 1 A schematic diagram of the axial structure from a second perspective in which the battery pack cooling structure is installed on the battery pack.
[0019] Figure 3 Shown Figure 1 Axial structural diagram of the battery pack cooling structure from the first perspective.
[0020] Figure 4 Shown is a schematic diagram of the axial structure of the battery pack cooling structure from a second viewing angle. DETAILED DESCRIPTION
[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, the following is a detailed description in conjunction with the accompanying drawings and preferred embodiments.
[0022] The utility model provides a battery pack cooling structure and a battery pack having the same. The battery pack cooling structure can achieve a temperature balance effect in the battery pack and improve the temperature consistency of the battery core.
[0023] Figure 1 The figure shows a schematic diagram of the axial structure of the battery pack cooling structure provided by the utility model installed on the battery pack from a first viewing angle. Figure 2 Shown Figure 1 A schematic diagram of the axial structure of the battery pack cooling structure installed on the battery pack from a second perspective, Figure 3 Shown Figure 1 A schematic diagram of the axial structure of the battery pack cooling structure from the first perspective. Figure 4 The figure shows the axial structure schematic diagram of the battery pack cooling structure from the second viewing angle. Figures 1 to 4 As shown, the battery pack cooling structure provided by the embodiment of the utility model includes a liquid inlet 10, a liquid outlet 20 and a cooling channel 30 connected between the liquid inlet 10 and the liquid outlet 20, and the cooling channel 30 includes a plurality of cooling areas connected in sequence, such as Figure 3 The A zone, B zone and C zone shown in FIG. 3 are not limited to the above three zones, and may be two or more cooling zones. In each cooling zone, the cooling channel 30 includes at least one first pipeline 31 (taking zone A as an example, Figure 3 1A in the figure) and the second pipeline 32 connected to the first pipeline 31 (taking area A as an example, Figure 33A in the figure), along the flow direction of the coolant, the second pipeline 32 is located downstream of the first pipeline 31, but the second pipeline 32 is closer to the direction of the liquid inlet 10 than the first pipeline 31. That is, overall, the cooling channel 30 is still arranged in a zigzag manner, but in the cooling channel 30, according to the flow direction of the coolant, the coolant will enter the second pipeline 32 after flowing through the first pipeline 31. In terms of the layout position, the second pipeline 32 is bent toward the liquid inlet 10, that is, toward the rear of the overall forward direction of the cooling channel 30, compared to the first pipeline 31. After flowing through the second pipeline 32, the coolant flows into the next cooling area.
[0024] In this embodiment, when heat exchange is performed, the coolant flows in from the liquid inlet 10 and flows into the first cooling area. In the first cooling area, the coolant first passes through the first pipeline 31 and participates in heat exchange with the battery pack 40 in the first pipeline 31. Taking the absorption of heat by the coolant as an example, after the coolant absorbs the heat of the battery pack 40, the temperature of the battery pack 40 decreases and the temperature of the coolant increases. When the coolant flows into the second pipeline 32 through the first pipeline 31, since the second pipeline 32 is located downstream of the first pipeline 31 along the flow direction of the coolant, before heat exchange, the temperature of the coolant in the second pipeline 32 is actually greater than or equal to the temperature of the coolant in the first pipeline 31; and since the second pipeline 32 is actually located between the first pipeline 31 and the liquid inlet 10, the temperature of the battery pack 40 in the area where the second pipeline 32 is located is actually less than or equal to the temperature of the battery pack 40 in the area where the first pipeline 31 is located. After heat exchange, the temperature of the coolant in the second pipeline 32 will decrease, and the area where the second pipeline 32 is located. When the coolant enters the next cooling area, the coolant can participate in the heat exchange of the next cooling area at a lower temperature. That is, the battery pack cooling structure can prevent the temperature of the coolant in the cooling channel 30 from rising continuously, so that the temperature in the battery pack 40 is balanced and the temperature consistency of the battery core is improved.
[0025] For further information, please refer to Figure 1 and Figure 2 When the battery pack cooling structure is disposed on the battery pack 40, the liquid inlet 10 and the liquid outlet 20 are respectively disposed at the two ends of the battery pack 40. In other words, from the overall flow direction of the coolant, the cooling channel 30 is along the first direction (eg Figure 1 The cooling channel 30 (roughly in the left-right direction) flows from one end of the battery pack 40 to the other end of the battery pack 40, and multiple cooling areas also flow from one end of the battery pack 40 to the other end of the battery pack 40. However, in each cooling area, the cooling flow channel 30 is bent backward when laid out.
[0026] Please continue to refer to Figure 1 and Figure 3In order to increase the temperature difference between the coolant flowing through the first pipeline 31 and the coolant flowing through the second pipeline 32, in this embodiment, a third pipeline 33 may be provided in the cooling area (taking area A as an example, Figure 3 2A is used to represent the cooling liquid. Along the flow direction of the coolant, the first pipeline 31, the third pipeline 33 and the second pipeline 32 are connected in sequence. In terms of the layout position, the third pipeline 33 is farther away from the liquid inlet 10 than the first pipeline 31. In other words, the cooling channel 30 will flow through the first pipeline 31 and the third pipeline 33 in sequence, and then flow into the second pipeline 32. The first pipeline 31 is located between the third pipeline 33 and the second pipeline 32. The temperature of the coolant in the third pipeline 33 will be higher than that in the first pipeline 31. At this time, the temperature difference between the second pipeline 32 and the battery pack 40 in the area where the second pipeline 32 is located will be greater, which is more conducive to the balance of the overall temperature of the battery pack 40 and improves the consistency of the battery cell temperature.
[0027] In order to facilitate the communication between the second pipeline 32 in the previous cooling area and the first pipeline 31 in the next cooling area, a fourth pipeline 34 may be provided in the cooling area (taking area A as an example, Figure 3 In the flow direction of the coolant, the fourth pipeline 34 is located downstream of the second pipeline 32 . In terms of layout, the fourth pipeline 34 is farther away from the liquid inlet 10 than the second pipeline 32 .
[0028] Preferably, the fourth pipeline 34 is located between the first pipeline 31 and the third pipeline 33 , so that the coolant flowing out of the second pipeline 32 can better exchange heat with the battery pack 40 area between the first pipeline 31 and the third pipeline 33 .
[0029] In this embodiment, in the same cooling area, along the flow direction of the coolant, the first pipeline 31, the third pipeline 33, the second pipeline 32 and the fourth pipeline 34 are arranged in sequence, and in the layout position, from the liquid inlet 10 to the liquid outlet 20, the second pipeline 32. The first pipeline 31, the fourth pipeline 34 and the third pipeline 33 are arranged in sequence. The cooling area near the liquid inlet 10 is connected to the liquid inlet 10 through the liquid inlet pipe 11, and the cooling area near the liquid outlet 20 is connected to the liquid outlet 20 through the liquid outlet pipe 21.
[0030] In this embodiment, the extension directions of the first pipeline 31, the second pipeline 32, the third pipeline 33 and the fourth pipeline 34 are perpendicular to the first direction. Among the four pipelines, adjacent pipelines are connected by connecting pipelines 35 extending along the first direction. At the intersection of each pipeline, one pipeline can cross over another pipeline.
[0031] Please continue to refer to Figure 1 and Figure 3In this embodiment, in each cooling area, at least one pipeline, such as the first pipeline 31 and / or the third pipeline 33, may be bent downward at the end, so that when the battery pack cooling structure is installed on the battery pack 40, the bent portion of the pipeline contacts the side of the battery pack 40. Through the above arrangement, the contact area between the battery pack cooling structure and the battery pack 40 can be increased.
[0032] For further information, please refer to Figure 1 and Figure 4 A first fixing plate 61 is also provided between the two pipes to support the shape of the cooling channel 30 in the battery pack cooling structure as a whole. A second fixing plate 62 is also provided at the liquid inlet 10 and the liquid outlet 20. When the battery pack cooling structure is fixed to the battery pack 40, the first fixing plate 61 and the second fixing plate 62 can be fixed to the side plates on both sides of the battery pack 40.
[0033] Furthermore, in this embodiment, the battery pack cooling structure also includes a thermally conductive gel (not shown), which is used to fix the cooling channel 30 on the battery pack 40 to ensure the thermal conductivity and fixation stability between the cooling channel 30 and the battery pack 40.
[0034] To sum up, in the present invention, by setting up multiple cooling areas, in each cooling area, the cooling channel 30 will bend backward, which can prevent the temperature of the coolant in the cooling channel 30 from continuing to rise, so that the temperature in the battery pack 40 can be balanced, thereby improving the temperature consistency of the battery cell.
[0035] The present invention further provides a battery pack 40, which includes the above-mentioned battery pack cooling structure. For other technical features of the battery pack 40, please refer to the prior art and will not be repeated here.
[0036] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A battery pack cooling structure, comprising a liquid inlet, a liquid outlet, and a cooling channel connected between the liquid inlet and the liquid outlet, characterized in that: The cooling channel includes a plurality of cooling areas connected in sequence. In each of the cooling areas, the cooling channel includes at least one first pipeline and at least one second pipeline connected to the first pipeline. Along the flow direction of the coolant, the second pipeline is located downstream of the first pipeline. In terms of layout position, the second pipeline is closer to the liquid inlet than the first pipeline.
2. The battery pack cooling structure according to claim 1, characterized in that: When the battery pack cooling structure is disposed on the battery pack, the liquid inlet and the liquid outlet are respectively disposed at two ends of the battery pack.
3. The battery pack cooling structure according to claim 1, characterized in that: A third pipeline is also provided in the cooling area. Along the flow direction of the coolant, the first pipeline, the third pipeline and the second pipeline are connected in sequence. In terms of layout position, the third pipeline is farther away from the liquid inlet than the first pipeline.
4. The battery pack cooling structure according to claim 3, characterized in that: A fourth pipeline is also provided in the cooling area. Along the flow direction of the coolant, the fourth pipeline is located downstream of the second pipeline. In terms of layout position, the fourth pipeline is farther away from the liquid inlet than the second pipeline.
5. The battery pack cooling structure according to claim 4, characterized in that: In terms of the layout position, the fourth pipeline is arranged between the first pipeline and the third pipeline.
6. The battery pack cooling structure according to claim 4, characterized in that: In the same cooling area, along the flow direction of the coolant, the first pipeline, the third pipeline, the second pipeline and the fourth pipeline are arranged in sequence, and in terms of layout position, from the liquid inlet to the liquid outlet, the second pipeline, the first pipeline, the fourth pipeline and the third pipeline are arranged in sequence.
7. The battery pack cooling structure according to claim 4, characterized in that: In each of the cooling areas, there is at least one pipeline, the end of which is bent downward so that when the battery pack cooling structure is installed on the battery pack, the bent portion of the pipeline contacts the side surface of the battery pack.
8. The battery pack cooling structure according to claim 1, characterized in that: A first fixing plate is arranged between the two pipelines, and a second fixing plate is arranged on the liquid inlet and the liquid outlet. When the battery pack cooling structure is fixed on the battery pack, the first fixing plate and the second fixing plate are fixed on the side plate of the battery pack.
9. The battery pack cooling structure according to claim 1, characterized in that: The battery pack cooling structure includes a thermally conductive gel. When the battery pack cooling structure is disposed on the battery pack, the cooling channel is fixed to the battery pack through the thermally conductive gel.
10. A battery pack, characterized in that: A battery pack cooling structure comprising the battery pack cooling structure as claimed in any one of claims 1 to 9.