Battery module

Abstract

The application discloses a battery module, comprising: a shell, an electric core, a support and a shielding part. The shell has a containing space, and a water inlet and a water outlet arranged oppositely, the water inlet is used for allowing a heat exchange medium to enter the containing space, and the heat exchange medium leaves the containing space through the water outlet; the electric core is arranged in the containing space; the support is arranged in the containing space and is used for mounting the electric core; the shielding part is arranged on a side of the support facing the electric core, the shielding part is arranged correspondingly to the electric core, and the shielding part is used for adjusting the heat exchange efficiency of the electric core and the heat exchange medium; and the area of the shielding part close to the water inlet is greater than the area of the shielding part close to the water outlet. The battery module of the application adjusts the flow distribution of the heat exchange medium by arranging the shielding part, so that the temperature difference of the electric cores in the module is reduced, the heat dissipation uniformity is improved, the temperature distribution of each electric core is more uniform, and the performance of the battery module is ensured and the service life of the battery module is prolonged.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery module. Background Technology

[0002] With the rapid development of electric vehicle technology, battery charge and discharge rates are constantly increasing, leading to a greater demand for heat dissipation from the battery cells. Traditional liquid cooling methods dissipate heat through contact between the liquid cooling plate and the battery cell, but their heat dissipation efficiency is limited and cannot meet the heat dissipation requirements of high-power batteries. Immersion liquid cooling technology, by completely immersing the battery cells in the heat exchange medium, can significantly improve heat dissipation efficiency. However, existing immersion cooling modules typically only have one inlet and one outlet. As the temperature of the heat exchange medium gradually increases during flow, the cells near the inlet have higher heat dissipation efficiency, while those near the outlet have lower efficiency, resulting in uneven temperature distribution among the cells within the module. This temperature difference not only affects battery performance but may also shorten battery life. Utility Model Content

[0003] This application provides a battery module that adjusts the flow distribution of the heat exchange medium by setting a shielding part, thereby reducing the temperature difference of the cells in the module, improving the heat dissipation uniformity, and making the temperature distribution of each cell more uniform, thereby ensuring the performance of the battery module and extending the service life of the battery module.

[0004] This application provides a battery module, including:

[0005] The housing has a receiving space and an inlet and an outlet disposed opposite to each other. The inlet is used to allow the heat exchange medium to enter the receiving space, and the heat exchange medium leaves the receiving space through the outlet.

[0006] A battery cell, wherein the battery cell is disposed within the receiving space;

[0007] A bracket is disposed within the receiving space and is used to install the battery cell;

[0008] A shielding part is provided on the side of the bracket facing the battery cell. The shielding part is provided corresponding to the battery cell. The shielding part is used to adjust the heat exchange efficiency between the battery cell and the heat exchange medium.

[0009] The area of ​​the shielding part near the water inlet is larger than the area of ​​the shielding part near the water outlet.

[0010] In some embodiments, the area of ​​the shielding portion gradually decreases in the direction from the inlet to the outlet;

[0011] Wherein, in the direction from the inlet to the outlet, the width of the blocking portion gradually decreases, so that the area of ​​the blocking portion gradually decreases; and / or,

[0012] In the direction from the inlet to the outlet, the height of the shielding portion gradually decreases, so that the area of ​​the shielding portion gradually decreases.

[0013] In some embodiments, the shielding portion is disposed on the side of the battery cell facing the water inlet.

[0014] In some embodiments, the number of battery cells is multiple, and the multiple battery cells are distributed at intervals between each other, with gaps between adjacent battery cells to allow the heat exchange medium to pass through.

[0015] In some embodiments, the number of brackets is two, and the two brackets include a first bracket and a second bracket, which are respectively disposed at both ends of the battery cell;

[0016] Wherein, the shielding portion includes a first shielding portion, which is disposed on the side of the first bracket facing the battery cell; and / or,

[0017] The shielding part includes a second shielding part, and the second shielding part is disposed on the side of the second bracket facing the battery cell.

[0018] In some embodiments, the battery cell has a main body and a terminal post. The terminal post is disposed at one end of the main body near the first bracket. The first bracket is provided with a first mounting portion and a second mounting portion communicating with the first mounting portion. The second bracket is provided with a third mounting portion. The two ends of the main body are respectively mounted to the first mounting portion and the third mounting portion, and the terminal post is mounted to the second mounting portion.

[0019] In some embodiments, the housing includes a side plate and a top plate and a bottom plate respectively disposed at both ends of the side plate, with both ends of the battery cell facing the top plate and the bottom plate respectively, and the side plate, the top plate and the bottom plate forming the receiving space.

[0020] In some embodiments, the side panel includes a first side panel and a second side panel disposed opposite to each other, as well as a third side panel and a fourth side panel disposed opposite to each other;

[0021] Wherein, the inlet and the outlet are respectively disposed on the first side plate and the second side plate; or,

[0022] The water inlet and the water outlet are respectively located on the third side plate and the fourth side plate.

[0023] In some embodiments, the battery module further includes a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is connected to the water inlet and the water outlet pipe is connected to the water outlet.

[0024] In some embodiments, the battery cell has a cylindrical structure, and the shielding portion extends from the bracket along the axial direction of the battery cell; and / or,

[0025] The shielding part and the bracket are integrally formed.

[0026] Beneficial effects: Compared with the prior art, the battery module provided in this application embodiment has a shielding part on the side of the bracket facing the cell. Since the temperature of the heat exchange medium gradually increases as it flows from the inlet to the outlet, the area of ​​the shielding part near the inlet is larger than the area of ​​the shielding part near the outlet. That is, the contact area between the cell near the inlet and the heat exchange medium is smaller than the contact area between the cell near the outlet and the heat exchange medium. This can reduce the heat dissipation efficiency of the cell near the inlet and improve the heat dissipation efficiency of the cell near the outlet. This can reduce the temperature difference between the cells in the module, improve the heat dissipation uniformity, and make the temperature distribution of each cell more uniform, thereby ensuring the performance of the battery module and extending the service life of the battery module. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is an exploded structural diagram of an embodiment of the battery module of this application;

[0029] Figure 2 This is a schematic diagram of the planar structure of an embodiment of the battery module of this application;

[0030] Figure 3 It is along Figure 2 Schematic diagram of the cross section of line AA in the middle;

[0031] Figure 4 It is along Figure 2 A cross-sectional view of the BB line.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Shell; 11. Accommodation space; 12. Inlet; 13. Outlet; 14. Side plate; 141. First side plate; 142. Second side plate; 143. Third side plate; 144. Fourth side plate; 15. Top plate; 16. Bottom plate; 2. Battery cell; 21. Main body; 22. Terminal post; 3. Bracket; 31. First bracket; 311. First mounting part; 312. Second mounting part; 32. Second bracket; 321. Third mounting part; 4. Shielding part; 41. First shielding part; 42. Second shielding part; 5. Inlet pipe; 6. Outlet pipe. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0035] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," 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 direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] This application provides a battery module, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0037] Reference Figure 1 One embodiment of this application provides a battery module, including: a housing 1, a battery cell 2, a bracket 3 and a shielding part 4. The battery cell 2 and the bracket 3 are disposed inside the housing 1. The shielding part 4 is disposed on the side of the bracket 3 facing the battery cell 2. The shielding part 4 is used to adjust the flow rate of the heat exchange medium (not shown) flowing through the battery cell 2, thereby adjusting the heat exchange efficiency between the battery cell 2 and the heat exchange medium.

[0038] Reference Figure 2 and Figure 3 The housing 1 has a receiving space 11 and an inlet 12 and an outlet 13 arranged opposite to each other. The inlet 12 is used to allow the heat exchange medium to enter the receiving space 11, and the heat exchange medium leaves the receiving space 11 through the outlet 13. The heat exchange medium is, for example, a coolant, and is used to exchange heat with the battery cell 2. The heat exchange medium can carry away the heat from the battery cell 2, thereby reducing the temperature of the battery cell 2.

[0039] Reference Figure 1 and Figure 3 The housing 1 can be rectangular or cuboid in shape. In this embodiment, the housing 1 is rectangular. The housing 1 may include a side plate 14 and a top plate 15 and a bottom plate 16 respectively disposed at both ends of the side plate 14, that is, the top plate 15 and the bottom plate 16 are disposed opposite to each other. The two ends of the battery cell 2 are respectively disposed towards the top plate 15 and the bottom plate 16, and the side plate 14, the top plate 15 and the bottom plate 16 enclose a receiving space 11.

[0040] Reference Figure 1 and Figure 3 The side panel 14 may include a first side panel 141 and a second side panel 142, and a third side panel 143 and a fourth side panel 144, which are disposed opposite to each other. The water inlet 12 and the water outlet 13 are respectively disposed on the first side panel 141 and the second side panel 142. Alternatively, the water inlet 12 and the water outlet 13 are respectively disposed on the third side panel 143 and the fourth side panel 144. In this embodiment, the water inlet 12 and the water outlet 13 are respectively disposed on the first side panel 141 and the second side panel 142. The battery module may also include a water inlet pipe 5 and a water outlet pipe 6, with the water inlet pipe 5 connected to the water inlet 12 and the water outlet pipe 6 connected to the water outlet 13. That is, the water inlet pipe 5 is disposed on the first side panel 141 and connected to the receiving space 11 through the water inlet 12, and the water outlet pipe 6 is disposed on the second side panel 142 and connected to the receiving space 11 through the water outlet 13.

[0041] Reference Figure 1 and Figure 3 The battery cells 2 are disposed within the housing space 11, and there are multiple battery cells 2. These multiple battery cells 2 are spaced apart from each other, with gaps between adjacent cells 2 to allow the heat exchange medium to pass through. This ensures that the heat exchange medium can fully contact each battery cell 2, thereby achieving heat exchange between the heat exchange medium and the battery cell 2. This not only ensures that the gaps between adjacent battery cells 2 are the same, improving heat dissipation uniformity, but also allows for the placement of more battery cells 2 within the housing space 11, thereby increasing the energy density of the battery module.

[0042] The multiple battery cells 2 are preferably evenly distributed in the accommodating space 11. For example, the multiple battery cells 2 can be arranged in a matrix, that is, the multiple battery cells 2 can be arranged in multiple rows and columns. In the direction from the inlet 12 to the outlet 13, that is, in the direction from the first side plate 141 to the second side plate 142, the battery cells 2 are arranged in rows, and in the direction from the third side plate 143 to the fourth side plate 144, the battery cells 2 are arranged in columns.

[0043] Reference Figure 3 and Figure 4 The bracket 3 is set in the accommodating space 11. The bracket 3 is used to install the battery cell 2 to ensure the stability of the position of the battery cell 2, thereby ensuring that there is a gap between adjacent battery cells 2 to allow the heat exchange medium to pass through, so as to realize the heat exchange medium and the battery cell 2 to exchange heat.

[0044] Reference Figure 3 and Figure 4 The shielding part 4 is disposed on the side of the bracket 3 facing the battery cell 2, and is correspondingly disposed to the battery cell 2. The shielding part 4 is used to adjust the heat exchange efficiency between the battery cell 2 and the heat exchange medium. That is, by changing the size of the shielding part 4, the flow rate of the heat exchange medium flowing through the battery cell 2 can be adjusted, thereby adjusting the heat dissipation efficiency of the battery cell 2. Preferably, the shielding part 4 is integrally formed with the bracket 3, which improves the structural strength and reliability of the bracket 3 and the shielding part 4, reduces assembly steps, and improves production efficiency.

[0045] Among them, reference Figure 3 and Figure 4 The area of ​​the shielding portion 4 near the inlet 12 is larger than the area of ​​the shielding portion 4 near the outlet 13. That is, the area of ​​the shielding portion 4 corresponding to the same row of battery cells 2 near the inlet 12 is larger than the area of ​​the shielding portion 4 near the outlet 13, thus increasing the flow rate of the heat exchange medium flowing through the battery cells 2 near the inlet 12. Preferably, the areas of the shielding portions 4 corresponding to the same row of battery cells 2 are the same.

[0046] When the heat exchange medium flows in from the inlet 12, its temperature is relatively low, resulting in high heat dissipation efficiency. The battery cells 2 near the inlet 12 are isolated to some extent by the larger shielding area 4, reducing the heat dissipation rate in this area. However, when the heat exchange medium approaches the outlet 13, its temperature has increased due to heat exchange with the battery cells 2. At this point, the smaller shielding area 4 increases the flow rate of the heat exchange medium in this area, accelerating heat dissipation. By controlling the area of ​​the shielding area 4 in different areas, the contact area between the battery cells 2 and the heat exchange medium in different areas is controlled, thereby balancing heat dissipation efficiency, reducing the temperature difference of the battery cells 2 within the module, and making the temperature distribution more uniform.

[0047] As a preferred method, refer to Figure 3 and Figure 4The shielding part 4 is located on the side of the battery cell 2 facing the water inlet 12. In this way, the shielding part 4 can directly block and regulate the heat exchange medium flowing into the area of ​​the battery cell 2, ensuring that the heat exchange medium flows through each battery cell 2 according to the designed flow rate distribution. It is more preferable that the shielding part 4 is set close to the battery cell 2. In this way, the shielding part 4 not only has a shielding function, but also plays a positioning role for the battery cell 2, ensuring the stability of the position of the battery cell 2.

[0048] The shape of the shielding part 4 can match the shape of the battery cell 2. The orthographic projection of the shielding part 4 onto the first side plate 141 can be quadrilateral or other shapes. As an example, refer to... Figure 1 When the battery cell 2 has a cylindrical structure, the shielding part 4 extends from the support 3 along the axial direction of the battery cell 2, and the shielding part 4 can be an arc-shaped surface. In this way, the shielding part 4 can not only better isolate the heat exchange medium from the battery cell 2, but also will not affect the flow of the heat exchange medium. In some embodiments, the battery cell 2 can also be of other shapes, which can be selected according to actual needs, and the shape of the shielding part 4 can also be changed accordingly.

[0049] In this application, by providing a shielding part 4 on the side of the bracket 3 facing the cell 2, since the temperature of the heat exchange medium gradually increases as it flows from the inlet 12 to the outlet 13, the area of ​​the shielding part 4 near the inlet 12 is larger than the area of ​​the shielding part 4 near the outlet 13. That is, the area of ​​the cell 2 near the inlet 12 in contact with the heat exchange medium is smaller than the area of ​​the cell 2 near the outlet 13 in contact with the heat exchange medium. This can reduce the heat dissipation efficiency of the cell 2 near the inlet 12, while improving the heat dissipation efficiency of the cell 2 near the outlet 13. This can reduce the temperature difference of the cells 2 in the module, improve the heat dissipation uniformity, and make the temperature distribution of each cell 2 more uniform, thereby ensuring the performance of the battery module and extending the service life of the battery module.

[0050] In one specific implementation, refer to Figure 3 and Figure 4 In the direction from inlet 12 to outlet 13, the area of ​​the shielding part 4 gradually decreases, that is, the area of ​​the shielding part 4 in the same row gradually decreases, while the area of ​​the shielding part 4 in the same column is the same. Specifically, in the direction from inlet 12 to outlet 13, the width of the shielding part 4 can gradually decrease, so that the area of ​​the shielding part 4 gradually decreases. In the direction from inlet 12 to outlet 13, the height of the shielding part 4 can gradually decrease, so that the area of ​​the shielding part 4 gradually decreases. This allows the flow rate of the heat exchange medium to be reasonably adjusted when flowing through the battery cells 2 in different areas, thereby achieving control over the heat dissipation efficiency of the battery cells 2 in different areas.

[0051] Reference Figure 1 and Figure 3There are two brackets 3. The two brackets 3 may include a first bracket 31 and a second bracket 32. The first bracket 31 and the second bracket 32 ​​are respectively disposed at both ends of the battery cell 2. The first bracket 31 and the second bracket 32 ​​can fix the battery cell 2 from both ends of the battery cell 2, further providing stability of the position of the battery cell 2.

[0052] Among them, reference Figure 1 and Figure 3 The shielding part 4 may include a first shielding part 41, which is disposed on the side of the first support 31 facing the battery cell 2, and the first shielding part 41 and the first support 31 are integrally formed. The shielding part 4 may also include a second shielding part 42, which is disposed on the side of the second support 32 facing the battery cell 2, and the second shielding part 42 and the second support 32 are integrally formed. In this embodiment, the shielding part 4 includes both the first shielding part 41 and the second shielding part 42, which allows for adjustment of the flow rate of the heat exchange medium from two directions, further improving the effect of temperature difference control. The structure and dimensions of the first shielding part 41 and the second shielding part 42 are preferably the same, and the first support 31 and the second support 32 are also preferably of the same structure.

[0053] Reference Figure 4 The battery cell 2 has a main body 21 and a terminal post 22, with the terminal post 22 disposed at one end of the main body 21 near the first bracket 31. The first bracket 31 is provided with a first mounting part 311 and a second mounting part 312 communicating with the first mounting part 311, and the second bracket 32 ​​is provided with a third mounting part 321. The two ends of the main body 21 are respectively mounted to the first mounting part 311 and the third mounting part 321, and the terminal post 22 is mounted to the second mounting part 312. This not only achieves a stable installation of the battery cell 2, but also provides reasonable space for the installation and connection of the terminal post 22, ensuring the electrical connection stability of the battery module.

[0054] The battery module provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery module, characterized by, include: The housing (1) has a receiving space (11) and an inlet (12) and an outlet (13) disposed opposite to each other. The inlet (12) is used to allow the heat exchange medium to enter the receiving space (11), and the heat exchange medium leaves the receiving space (11) through the outlet (13). Battery cell (2), wherein the battery cell (2) is disposed within the accommodating space (11); A bracket (3) is disposed within the receiving space (11) and is used to install the battery cell (2); A shielding part (4) is provided on the side of the bracket (3) facing the battery cell (2). The shielding part (4) is provided corresponding to the battery cell (2). The shielding part (4) is used to adjust the heat exchange efficiency between the battery cell (2) and the heat exchange medium. The area of ​​the shielding part (4) near the water inlet (12) is larger than the area of ​​the shielding part (4) near the water outlet (13).

2. The battery module of claim 1, wherein, In the direction from the inlet (12) to the outlet (13), the area of ​​the shielding part (4) gradually decreases; In the direction from the inlet (12) to the outlet (13), the width of the blocking portion (4) gradually decreases, so that the area of ​​the blocking portion (4) gradually decreases; and / or, In the direction from the inlet (12) to the outlet (13), the height of the shielding part (4) gradually decreases, so that the area of ​​the shielding part (4) gradually decreases.

3. The battery module of claim 1, wherein, The shielding part (4) is disposed on the side of the battery cell (2) facing the water inlet (12).

4. The battery module of claim 1, wherein, The number of the battery cells (2) is multiple, and the multiple battery cells (2) are distributed at intervals to each other, with gaps between adjacent battery cells (2) to allow the heat exchange medium to pass through.

5. The battery module of claim 1, wherein, The number of brackets (3) is two, and the two brackets (3) include a first bracket (31) and a second bracket (32). The first bracket (31) and the second bracket (32) are respectively disposed at both ends of the battery cell (2); The shielding part (4) includes a first shielding part (41), which is disposed on the side of the first bracket (31) facing the battery cell (2); and / or, The shielding part (4) includes a second shielding part (42), which is disposed on the side of the second bracket (32) facing the battery cell (2).

6. The battery module of claim 5, wherein, The battery cell (2) has a main body (21) and a terminal (22). The terminal (22) is disposed at one end of the main body (21) near the first bracket (31). The first bracket (31) is provided with a first mounting part (311) and a second mounting part (312) communicating with the first mounting part (311). The second bracket (32) is provided with a third mounting part (321). The two ends of the main body (21) are respectively mounted on the first mounting part (311) and the third mounting part (321), and the terminal (22) is mounted on the second mounting part (312).

7. The battery module of claim 1, wherein, The housing (1) includes a side plate (14) and a top plate (15) and a bottom plate (16) respectively disposed at both ends of the side plate (14). The two ends of the battery cell (2) are respectively disposed towards the top plate (15) and the bottom plate (16). The side plate (14), the top plate (15) and the bottom plate (16) enclose the receiving space (11).

8. The battery module of claim 7, wherein, The side plate (14) includes a first side plate (141) and a second side plate (142) disposed opposite to each other, as well as a third side plate (143) and a fourth side plate (144) disposed opposite to each other; Wherein, the inlet (12) and the outlet (13) are respectively disposed on the first side plate (141) and the second side plate (142); or, The inlet (12) and the outlet (13) are respectively located on the third side plate (143) and the fourth side plate (144).

9. The battery module of claim 1, wherein, The battery module also includes a water inlet pipe (5) and a water outlet pipe (6), the water inlet pipe (5) being connected to the water inlet (12) and the water outlet pipe (6) being connected to the water outlet (13).

10. The battery module of claim 1, wherein, The battery cell (2) has a cylindrical structure, and the shielding portion (4) extends from the bracket (3) along the axial direction of the battery cell (2); and / or, The shielding part (4) and the bracket (3) are integrally formed.

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