Battery cell liquid cooling module and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cell liquid cooling module and a battery pack, the battery cell liquid cooling module comprises a box body, a plurality of battery cells, a liquid inlet pipe and a liquid outlet pipe, the two ends of each battery cell are respectively arranged in the mounting holes of the two supporting plates in a sealing interference fit manner; the liquid inlet pipe is communicated with the liquid inlet; the liquid outlet pipe is communicated with the liquid outlet. According to the battery cell liquid cooling module with the structure, the two ends of the battery cell are mounted on the supporting plates in an interference fit manner, and the battery cell is simple in mounting structure and convenient to mount and dismount. Meanwhile, the two supporting plates and the side wall of the box body define a closed liquid storage cavity, polarity output ends are arranged on the end faces of the two ends of the battery cell, and the polarity output ends are located outside the supporting plates, so that the polarity output ends can be separated from the liquid storage cavity, and the influence of cooling liquid on the polarity output ends in the cooling process is avoided. When the battery cell is cooled, cooling liquid enters the liquid storage cavity from the liquid inlet pipe, and the cooling liquid after heat exchange flows out of the liquid storage cavity from the liquid outlet pipe.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a liquid cooling module for battery cells and a battery pack. Background Technology

[0002] As a high-energy-density energy storage component in electric vehicles, the safety of the battery pack structure is crucial to the overall vehicle safety. During battery cell operation, it is essential to maintain them within a suitable temperature range. Under high-rate charging conditions, the cells generate a significant amount of heat, and the internal temperature distribution within the cells is highly uneven. Increased temperature and temperature unevenness affect cell performance, reduce cell lifespan, and in severe cases, lead to thermal runaway, causing loss of life and property. Liquid-cooled cell modules can effectively control cell temperature rise; however, the installation process between the cells and the module bracket is complex, and cell disassembly and installation are inconvenient. Utility Model Content

[0003] In view of this, the present invention provides a liquid-cooled cell module and battery pack to solve the problem of inconvenient cell installation and disassembly in the prior art.

[0004] In a first aspect, this utility model provides a battery cell liquid cooling module, comprising:

[0005] The housing includes two opposing support plates, which together with the side wall of the housing form a closed liquid storage chamber; each support plate is provided with multiple mounting holes, one of the two support plates is provided with a liquid inlet and the other is provided with a liquid outlet;

[0006] Multiple battery cells, each of which is sealed and interference-fitted at both ends into the mounting holes of the two support plates;

[0007] The inlet pipe is connected to the inlet port;

[0008] The liquid outlet pipe is connected to the liquid outlet.

[0009] Beneficial effects: This battery cell liquid-cooled module features a simple mounting structure where the two ends of the battery cell are mounted on support plates via interference fit, facilitating easy installation and disassembly. Simultaneously, the two support plates and the side walls of the housing form a closed liquid storage chamber. Polarized output terminals are located on both ends of the battery cell, outside the support plates, isolating them from the liquid storage chamber and preventing the coolant from affecting them during cooling. When cooling the battery cell, coolant enters the liquid storage chamber through the inlet pipe, and the cooled coolant flows out through the outlet pipe after heat exchange.

[0010] In one optional embodiment, a sealing elastic element is further included, which is correspondingly and sealingly disposed between the outer wall surface of the battery cell and the mounting hole.

[0011] Beneficial effects: When installing the battery cell, the sealing elastic element is squeezed and pressed against the outer wall of the battery cell by interference to install the battery cell on the support plate. At the same time, the sealing elastic element forms a seal between the support plate and the battery cell, so that the liquid storage chamber is formed into a closed liquid storage chamber, preventing the coolant in the liquid storage chamber from leaking out of the mounting hole of the support plate.

[0012] In one optional embodiment, the sealing elastic element includes a compression portion and two mounting portions. The cross-sectional shape of the compression portion is adapted to the shape of the mounting hole. The two mounting portions are respectively disposed at both ends of the compression portion and extend outward toward the compression portion. A mounting groove is formed between the two mounting portions, and the mounting groove is sleeved on the support plate at the outer edge of the mounting hole.

[0013] In one optional embodiment, a busbar is also included, with two support plates disposed inside the housing, and a positive output terminal and a negative output terminal respectively provided at both ends of the battery cell. The positive output terminal and the negative output terminal are located outside the support plates, and the busbar connects the positive output terminal and the negative output terminal.

[0014] In one optional embodiment, the busbar includes a first abutting portion, an elastic force-applying portion, and a second abutting portion. The elastic force-applying portion is disposed between the first abutting portion and the second abutting portion. The elastic force-applying portion is pressed to apply pressure to both sides, so that the first abutting portion abuts against the inner wall surface of the end of the housing, and the second abutting portion abuts against the positive output terminal or the negative output terminal.

[0015] Beneficial effect: This setting allows the second contact part to be in close contact with the positive or negative output terminal, ensuring the stability of the electrical connection.

[0016] In one alternative embodiment, the elastic force-applying part is cylindrical;

[0017] And / or, the first abutting portion and the second abutting portion are plate-shaped.

[0018] Beneficial effects: The elastic force-applying part is cylindrical, which facilitates elastic deformation and compression when compressed, so as to apply pressure to the first and second abutment parts at both ends. The first and second abutment parts are plate-shaped, which facilitates the first abutment part to abut against the inner wall surface of the end of the housing, and facilitates the second abutment part to fit tightly against the positive or negative output terminal.

[0019] In one alternative implementation, the positive and negative output terminals of adjacent battery cells are staggered, and the busbar is connected in series with all the battery cells.

[0020] In one optional embodiment, the housing includes two guide plates disposed between two support plates, each guide plate having a guide hole through which the battery cell passes, and the guide plate also having a liquid passage hole.

[0021] Beneficial effects: The battery cell is inserted into the guide hole, and the guide plate has liquid passage holes. The guide plate supports and fixes the battery cell, so that the battery cell is stably held on the casing.

[0022] In one optional embodiment, the housing includes a central frame and two end frames, two guide plates are disposed at both ends of the central frame, and the two end frames are respectively disposed outside the two guide plates. The end frames and the guide plates form a closed cavity, and the support plate is disposed within the closed cavity.

[0023] Beneficial effects: The end frame and the middle frame are set separately, which facilitates the installation and disassembly of the enclosure and battery cells.

[0024] Secondly, this utility model also provides a battery pack, including the cell liquid-cooled module described in any of the above-mentioned embodiments. The battery pack includes the cell liquid-cooled module and has the same technical effects as the cell liquid-cooled module, which will not be described in detail here. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a battery cell liquid cooling module according to an embodiment of the present utility model;

[0027] Figure 2 This is a cross-sectional view of a battery cell liquid cooling module according to an embodiment of the present invention;

[0028] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0029] Figure 4 This is a cross-sectional view of a battery cell liquid cooling module according to an embodiment of the present invention;

[0030] Figure 5 for Figure 4 A magnified view of part B in the diagram;

[0031] Figure 6 for Figure 4 A magnified view of part C in the diagram.

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

[0033] 1. Housing; 11. Support plate; 12. Liquid storage chamber; 13. Middle frame; 131. Guide plate; 14. End frame; 2. Battery cell; 3. Inlet pipe; 4. Outlet pipe; 5. Sealing elastic element; 51. Compression part; 52. Mounting part; 6. Manifold; 61. First abutment part; 62. Elastic force application part; 63. Second abutment part. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, a battery cell liquid cooling module is provided, including a housing 1, multiple battery cells 2, an inlet pipe 3, and an outlet pipe 4.

[0037] The housing 1 includes two opposing support plates 11, which together with the side wall of the housing 1 form a closed liquid storage chamber 12. Each support plate 11 has multiple mounting holes, one of the two support plates 11 has a liquid inlet, and the other has a liquid outlet. The two ends of each battery cell 2 are respectively sealed and interference-fitted into the mounting holes of the two support plates 11. The liquid inlet pipe 3 is connected to the liquid inlet, and the liquid outlet pipe 4 is connected to the liquid outlet.

[0038] In this liquid-cooled battery module, the two ends of the battery cell 2 are mounted on the support plate 11 via an interference fit. The battery cell 2 has a simple mounting structure, making it easy to install and disassemble. Simultaneously, the two support plates 11 and the side wall of the housing 1 form a closed liquid storage chamber 12. Polarized output terminals are provided on both end faces of the battery cell 2, located outside the support plates 11. This isolates the polarized output terminals from the liquid storage chamber 12, preventing the coolant from affecting the polarized output terminals during cooling. When cooling the battery cell 2, the coolant enters the liquid storage chamber 12 through the inlet pipe 3, and the cooled coolant flows out of the liquid storage chamber 12 through the outlet pipe 4.

[0039] In some alternative embodiments, such as Figure 1 and Figure 2As shown, the battery cell liquid cooling module also includes sealing elastic elements 5, which are correspondingly sealed between the outer wall surface of the battery cell 2 and the mounting hole. When the battery cell 2 is installed, the sealing elastic elements 5 are squeezed, and the sealing elastic elements 5 press the outer wall surface of the battery cell 2 by interference fit to install the battery cell 2 on the support plate 11. At the same time, the sealing elastic elements 5 form a seal between the support plate 11 and the battery cell 2, so that the liquid storage cavity 12 forms a closed liquid storage cavity 12, preventing the coolant in the liquid storage cavity 12 from leaking out of the mounting hole of the support plate 11.

[0040] The sealing elastic element 5 is made of an elastic material, for example, the sealing elastic element 5 includes a rubber gasket.

[0041] Alternatively, in some embodiments, such as Figure 2 and Figure 3 As shown, the sealing elastic element 5 includes a compression part 51 and two mounting parts 52. The cross-sectional shape of the compression part 51 is adapted to the shape of the mounting hole. The two mounting parts 52 are respectively located at both ends of the compression part 51, extending outwards towards the compression part 51. The two mounting parts 52 form a mounting groove, which is fitted onto the support plate 11 at the outer edge of the mounting hole. The battery cell 2 passes through the inner hole of the compression part 51 and compresses the hole wall of the compression part 51. The sealing elastic element 5 has a simple and reliable structure, and can be stably held on the support plate 11 to ensure the fixing effect of the battery cell 2.

[0042] In some alternative embodiments, the battery cell liquid cooling module also includes a busbar 6, two support plates 11 are disposed inside the housing 1, the two ends of the battery cell 2 are respectively provided with a positive output terminal and a negative output terminal, the positive output terminal and the negative output terminal are located outside the support plates 11, and the busbar 6 connects the positive output terminal and the negative output terminal. This arrangement facilitates the connection of the busbar 6 to the positive output terminal and the negative output terminal.

[0043] like Figure 5 and Figure 6 As shown, in some embodiments, the busbar 6 includes a first abutment portion 61, an elastic force-applying portion 62, and a second abutment portion 63. The elastic force-applying portion 62 is disposed between the first abutment portion 61 and the second abutment portion 63. When the elastic force-applying portion 62 is pressed, pressure is applied to both sides of it so that the first abutment portion 61 abuts against the inner wall surface of the end of the housing 1, and the second abutment portion 63 abuts against the positive output terminal or the negative output terminal. This arrangement allows the second abutment portion 63 to be in close contact with the positive output terminal or the negative output terminal, ensuring the stability of the electrical connection.

[0044] The elastic force-applying part 62 is an elastic structure that can apply pressure to the first abutment part 61 and the second abutment part 63 at both ends when compressed. For example, the elastic force-applying part 62 includes a spring.

[0045] In some alternative embodiments, the elastic force-applying part 62 is cylindrical, and the first abutment part and the second abutment part are plate-shaped. The cylindrical shape of the elastic force-applying part 62 facilitates elastic deformation and compression when compressed, so as to apply pressure to the first abutment part 61 and the second abutment part 63 at its two ends. The plate-shaped first abutment part 61 facilitates abutment against the inner wall surface of the end of the housing 1, and facilitates the second abutment part 63 to fit tightly against the positive or negative output terminal.

[0046] Optionally, in some embodiments, the positive and negative output terminals of adjacent cells 2 are alternately arranged, and the bus 6 is connected in series with all cells 2. For example... Figure 5 As shown, the top of one battery cell 2 is the positive output terminal, and the top of the other adjacent battery cell 2 is the negative output terminal. The first abutment portion 61 has two spaced elastic force-applying portions 62, each elastic force-applying portion 62 connected to a second abutment portion 63. The two second abutment portions 63 on each first abutment portion 61 are respectively connected to the positive and negative output terminals of two adjacent battery cells 2. Busbars 6 located at the beginning and end extend outwards from the housing 1.

[0047] In other embodiments, the positive and negative output terminals of adjacent cells 2 can also be arranged on the same side, that is, the top of all cells 2 is a positive output terminal or a negative output terminal, in which case the busbar 6 connects all cells 2 in parallel.

[0048] In some alternative embodiments, cell 2 comprises a cylindrical cell. The mounting hole is circular.

[0049] In some embodiments, such as Figure 2 and Figure 4 As shown, the housing 1 includes two guide plates 131, which are positioned between two support plates 11. Each guide plate 131 has a guide hole, through which the battery cell 2 passes. The guide plates 131 also have liquid passage holes. The guide plates 131 support and fix the battery cell 2, ensuring its stable position on the housing 1. Coolant entering through the inlet pipe 3 can pass through the liquid passage hole of one guide plate 131 into the cavity between the two support plates 11, then flow out of the support plate 11 through the liquid passage hole of the other guide plate 131, and finally out of the housing 1 through the outlet pipe 4, thus carrying away heat from the battery cell 2 and completing the heat dissipation process.

[0050] like Figure 1 , Figure 2 and Figure 4As shown, in some embodiments, the housing 1 includes a central frame 13 and two end frames 14. Two guide plates 131 are located at both ends of the central frame 13, and the two end frames 14 are respectively located outside the two guide plates 131. The end frames 14 and the guide plates 131 form a closed cavity, and a support plate 11 is located inside the closed cavity. During installation, the battery cell 2 is first installed on the guide plates 131 at both ends of the central frame 13, and the support plate 11 is fixed inside the end frames 14. The end frames 14 include four sides and an end, and the central frame 13 includes four sides and guide plates 131 at both ends. The first abutment part 61 is fixed to the inner wall of the end of the end frame 14. The battery cell 2 is passed through the inner hole of the compression part 51 of the sealing elastic member 5, and the end frame 14 is fixed on the guide plate 131, completing the installation of the battery cell liquid cooling module. The end frames 14 and the central frame 13 are separately set, which facilitates the installation and disassembly of the housing 1 and the battery cell 2.

[0051] Optionally, such as Figure 4 As shown, the inlet pipe 3 is located at the bottom of the housing 1, and the outlet pipe 4 is located at the top of the housing 1. During cooling, the coolant enters the cavity inside the support plate 11 through the inlet pipe 3, then enters the cavity inside the guide plate 131 and the cavity between the other guide plate 131 and the other support plate 11 through the liquid passage hole on the guide plate 131. The coolant exchanges heat with the battery cell 2 to remove the heat from the battery cell 2, and finally flows out of the housing 1 through the outlet pipe 4.

[0052] According to an embodiment of the present invention, another aspect provides a battery pack including the cell liquid cooling module of any of the above.

[0053] In this battery pack structure, the two ends of the battery cell 2 in the liquid-cooled module are mounted on the support plate 11 via interference fit. The battery cell 2 has a simple mounting structure, making it easy to install and disassemble. At the same time, the two support plates 11 and the side wall of the housing 1 form a closed liquid storage cavity 12. The two end faces of the battery cell 2 are provided with polarity output terminals, which are located outside the support plate 11. This isolates the polarity output terminals from the liquid storage cavity 12, preventing the coolant from affecting the polarity output terminals during cooling.

[0054] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery cell liquid cooling module, characterized in that, include: The housing includes two opposing support plates, which together with the side wall of the housing form a closed liquid storage chamber; each support plate is provided with multiple mounting holes, one of the two support plates is provided with a liquid inlet and the other is provided with a liquid outlet; Multiple battery cells, each of which is sealed and interference-fitted at both ends into the mounting holes of the two support plates; The inlet pipe is connected to the inlet port; The liquid outlet pipe is connected to the liquid outlet.

2. The cell liquid cooling module according to claim 1, characterized in that, It also includes sealing elastic elements, which are correspondingly and sealed between the outer wall surface of the battery cell and the mounting hole.

3. The cell liquid cooling module according to claim 2, characterized in that, The sealing elastic element includes a compression part and two mounting parts. The cross-sectional shape of the compression part is adapted to the shape of the mounting hole. The two mounting parts are respectively disposed at both ends of the compression part. The mounting parts extend outward toward the compression part and form a mounting groove between the two mounting parts. The mounting groove is sleeved on the support plate at the outer edge of the mounting hole.

4. The cell liquid-cooled module according to any one of claims 1 to 3, characterized in that, It also includes a busbar, two support plates are disposed inside the housing, the two ends of the battery cell are respectively provided with a positive output terminal and a negative output terminal, the positive output terminal and the negative output terminal are located outside the support plate, and the busbar connects the positive output terminal and the negative output terminal.

5. The cell liquid cooling module according to claim 4, characterized in that, The busbar includes a first abutting part, an elastic force-applying part, and a second abutting part. The elastic force-applying part is disposed between the first abutting part and the second abutting part. The elastic force-applying part is pressed to apply pressure to both sides, so that the first abutting part abuts against the inner wall surface of the end of the housing, and the second abutting part abuts against the positive output terminal or the negative output terminal.

6. The cell liquid cooling module according to claim 5, characterized in that, The elastic force-applying part is cylindrical; And / or, the first abutting portion and the second abutting portion are plate-shaped.

7. The cell liquid cooling module according to claim 4, characterized in that, The positive and negative output terminals of adjacent battery cells are staggered, and the busbar is connected in series with all the battery cells.

8. The cell liquid-cooled module according to any one of claims 1 to 3, characterized in that, The housing includes two guide plates, which are disposed between two support plates. The guide plates are provided with guide holes, and the battery cells pass through the guide holes. The guide plates are also provided with liquid passage holes.

9. The cell liquid cooling module according to claim 8, characterized in that, The housing includes a central frame and two end frames. Two guide plates are located at both ends of the central frame, and the two end frames are located outside the two guide plates respectively. The end frames and the guide plates form a closed cavity, and the support plate is located inside the closed cavity.

10. A battery pack, characterized in that, The battery cell liquid cooling module includes any one of claims 1 to 9.

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