Battery system and vehicle

Abstract

The present application provides a battery system and a vehicle. The battery system comprises: a battery unit, comprising a plurality of battery cells arranged in a first direction, each battery cell comprising a battery main body and a post that protrudes from the battery main body; a conductive bar, connected to the post of at least one battery main body; and a first liquid cooling component, comprising a liquid cooling plate and a support portion. The liquid cooling plate is located on the side of the conductive bar away from the battery cells. The liquid cooling plate exchanges heat with the conductive bar. The support portion is arranged between the liquid cooling plate and at least one battery main body to support the liquid cooling plate.

Description

Battery system and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202422003832.0, filed on August 16, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicles, in particular to a battery system and a vehicle. BACKGROUND

[0003] With the rapid development of new energy technology, battery systems, as key components of energy storage and conversion, have been widely used in electric vehicles, energy storage systems and other fields. In order to ensure the safe operation of battery systems under high power output and high energy density, effective thermal management becomes crucial. Liquid cooling technology, as a kind of efficient thermal management method, absorbs and transfers the heat generated by the battery through the circulation of liquid medium, so as to achieve the purpose of cooling. TECHNICAL PROBLEM

[0004] In related liquid cooling systems, the liquid cooling plate is usually designed to be close to the battery module to achieve the best heat exchange effect. However, in the related art, when the liquid cooling plate is arranged on the side of the conductive bar, the possibility of deformation or scratching of the conductive bar caused by the contact between the liquid cooling plate and the conductive bar is likely to occur, which affects the reliability of the battery system. TECHNICAL SOLUTION

[0005] In a first aspect, the present application provides a battery system, comprising: a battery unit comprising a plurality of single batteries arranged in a first direction, the single battery comprising a battery body and a pole protruding from the battery body; a conductive bar connected to the pole of at least one battery body; a first liquid cooling component comprising a liquid cooling plate and a support part, the liquid cooling plate being located on the side of the conductive bar away from the single battery, the liquid cooling plate being in heat exchange with the conductive bar, and the support part being arranged between the liquid cooling plate and the at least one battery body to support the liquid cooling plate.

[0006] In a second aspect, the present application provides a vehicle, comprising: a vehicle body comprising a bottom plate; the above-mentioned battery system, the battery system further comprising a box body having a mounting cavity and a mounting opening, the battery unit of the battery system being located in the mounting cavity, the first liquid cooling component being arranged close to the mounting opening, and the bottom plate sealing the mounting opening. ADVANTAGEOUS EFFECTS

[0007] The beneficial effects of the present application are: by applying the technical solution of the present application, the possibility of deformation or damage of the conductive row caused by the contact between the first liquid cooling component and the conductive row can be reduced or avoided, which helps to prevent the electrical connection caused by physical damage of the conductive row, thereby improving the safety of the entire battery system. Specifically, the conductive row generates heat during the charging and discharging process of the battery, and the first liquid cooling component exchanges heat with the conductive row to keep the temperature of the conductive row stable. The support part can prevent the pressure of the liquid cooling plate from directly acting on the conductive row, thereby avoiding deformation or damage of the conductive row due to stress, that is, the support part provides support force for the first liquid cooling component, which can avoid or reduce the possibility of direct contact between the liquid cooling plate and the conductive row, thereby reducing the risk of deformation or damage of the conductive row caused by the contact between the liquid cooling plate and the conductive row, to reduce the risk of electrical short circuit and ensure the electrical safety of the battery system. BRIEF DESCRIPTION OF DRAWINGS

[0008] FIG. 1 shows a partial structure schematic diagram of a battery system provided by an embodiment of the present application;

[0009] FIG. 2 shows a partial structure cross-sectional view of a battery system provided by an embodiment of the present application;

[0010] FIG. 3 shows a partial structure schematic diagram of A in FIG. 2;

[0011] FIG. 4 shows a partial structure schematic diagram of a first liquid cooling component provided by an embodiment of the present application;

[0012] FIG. 5 shows a front view of the first liquid cooling component provided by an embodiment of the present application.

[0013] Among them, the above drawings include the following reference signs:

[0014] 01, battery unit;

[0015] 10, single battery; 11, battery body; 121, first pole; 122, second pole;

[0016] 20, first liquid cooling component; 21, liquid cooling plate; 211, first heat exchange channel; 22, support part;

[0017] 221, second heat exchange channel;

[0018] 30, conductive row; 31, first conductive row; 32, second conductive row;

[0019] 40, heat-conducting structure;

[0020] 50, box body; 501, mounting cavity; 502, mounting port; 60, upper cover;

[0021] 70, adhesive layer;

[0022] 80, second liquid cooling component.

[0023] Embodiments of the present application

[0024] As shown in FIGS. 1-3, the embodiments of the present application provide a battery system, which includes a battery unit 01, a conductive bar 30, and a first liquid cooling component 20. The battery unit 01 includes a plurality of single batteries 10 arranged in a first direction, the single battery 10 includes a battery body 11 and a pole protruding from the battery body 11; the conductive bar 30 is connected to the pole of at least one battery body 11; the first liquid cooling component 20 includes a liquid cooling plate 21 and a support part 22, the liquid cooling plate 21 is located on the side of the conductive bar 30 away from the single battery 10, the liquid cooling plate 21 exchanges heat with the conductive bar 30, and the support part 22 is arranged between the liquid cooling plate 21 and the at least one battery body 11 to support the liquid cooling plate 21.

[0025] By applying the technical solution of the present application, the possibility of deformation or damage of the conductive bar 30 caused by the contact between the first liquid cooling component 20 and the conductive bar 30 can be reduced or avoided, which helps to prevent the electrical connection problem of the conductive bar 30 caused by physical damage, thereby improving the safety of the entire battery system. Specifically, the conductive bar 30 generates heat during the charging and discharging process of the battery, and the first liquid cooling component 20 exchanges heat with the conductive bar 30 to keep the temperature of the conductive bar 30 stable. The support part 22 can prevent the pressure of the liquid cooling plate 21 from directly acting on the conductive bar 30, thereby avoiding deformation or damage of the conductive bar 30 due to stress, i.e., the support part 22 provides support force for the first liquid cooling component 20, which can avoid or reduce the possibility of direct contact between the liquid cooling plate 21 and the conductive bar 30, thereby reducing the risk of deformation or damage of the conductive bar 30 caused by the contact between the liquid cooling plate 21 and the conductive bar 30, to reduce the risk of electrical short circuit and ensure the electrical safety of the battery system.

[0026] In the embodiments of the present application, a plurality of battery units 01 are provided, and the plurality of battery units 01 are distributed in a second direction, the second direction has an angle with the first direction, and in the embodiments of the present application, the first direction and the second direction are perpendicular. One first liquid cooling component 20 is provided corresponding to each of two adjacent battery units 01, and the support part 22 is connected to the single battery 10 in each of the two adjacent battery units 01. In this way, it can be ensured that each battery unit has a close heat exchange source, thereby realizing more uniform heat exchange. Moreover, the support part 22 is connected to the single battery 10 in each of the two adjacent battery units 01, which can provide uniform support force and reduce the deformation of the battery unit caused by the flow of cooling liquid or external impact. Moreover, the above arrangement enables the two adjacent battery units 01 to exchange heat with the same first liquid cooling component 20, which can save space and reduce the number of first liquid cooling components 20 used. In FIG. 1, the Y direction is the first direction, and the X direction is the second direction.

[0027] Specifically, the support portion 22 and the liquid cooling plate 21 each extend along a first direction. The liquid cooling plate 21 is substantially a rectangular plate structure, and has a first surface and a second surface oppositely arranged along a thickness direction. The first surface of the liquid cooling plate 21 is arranged towards the conductive row 30. Along a direction from the second surface to the first surface, the support portion 22 is arranged to protrude from the first surface away from the second surface.

[0028] Optionally, the pole posts of the same single battery 10 include a first pole post 121 and a second pole post 122, the first pole post 121 and the second pole post 122 are arranged on the same side of the battery body 11, and the first pole post 121 and the second pole post 122 are distributed along a second direction; the conductive row 30 includes a first conductive row 31 and a second conductive row 32, and the first conductive row 31 and the second conductive row 32 are arranged corresponding to each battery cell 01, the first conductive row 31 is connected with at least one first pole post 121, and the second conductive row 32 is connected with at least one second pole post 122. In this way, the series connection or parallel connection between the single batteries can be facilitated.

[0029] In the embodiment of the present scheme, in the same battery cell 01, along the first direction, the first pole posts 121 of the adjacent two single batteries 10 are connected by one first conductive row 31, and the second pole posts 122 of the adjacent two single batteries 10 are connected by one second conductive row 32. That is, the first conductive row 31 extends along the first direction, and the second conductive row 32 extends along the first direction.

[0030] Specifically, the plurality of first conductive rows 31 of the same battery cell 01 are distributed along the first direction, and the plurality of second conductive rows 32 of the same battery cell 01 are distributed along the first direction. Optionally, the first conductive rows 31 and the second conductive rows 32 of the plurality of battery cells 01 are alternately distributed along the second direction, and the support portion 22 is located between the adjacent first conductive row 31 and the second conductive row 32. Along the second direction, the first conductive row 31 has a spacing with the support portion 22, and the second conductive row 32 has a spacing with the support portion 22. In this way, the heat exchange between the adjacent two battery cells 01 through the same first liquid cooling component 20 can be facilitated. Moreover, the possibility of mutual contact between the first conductive row 31 or the second conductive row 32 and the support portion 22 can be avoided.

[0031] Optionally, along the direction from the battery cell 01 to the first liquid cooling component 20, the projection of the first conductive row 31 and the projection of the second conductive row 32 are both located on the liquid cooling plate 21. In this way, the uniformity of the heat exchange between the first liquid cooling component 20 and the first conductive row 31 and the second conductive row 32 can be improved, and the heat conduction effect can be improved.

[0032] As shown in FIGS. 3-5, in particular, in the present scheme, the support portion 22 is located in the middle of the liquid cooling plate 21 in the second direction, and the longitudinal cross-sectional shape of the first liquid cooling component 20 is T-shaped. Such arrangement makes the first liquid cooling component 20 form a symmetrical structure, which can improve the uniformity of heat exchange between the first liquid cooling component 20 and the adjacent two battery cells 01. Moreover, the above arrangement can make the force of the first liquid cooling component 20 be evenly applied to the adjacent two battery cells 01 through the support portion 22, which helps to improve the structural stability and rigidity of the entire battery system. In FIG. 4, the second direction is the X direction, and the first direction is the Y direction.

[0033] Optionally, there is a gap between the liquid cooling plate 21 and the conductive row 30. In particular, there is a gap between the first surface of the liquid cooling plate 21 and the conductive row 30. Such arrangement can further reduce the possibility of contact between the liquid cooling plate 21 and the conductive row 30, and reduce the possibility of damage to the conductive row 30.

[0034] In some embodiments of the present scheme, the battery cell 01 further comprises a heat-conducting structure 40, which is arranged between the first liquid cooling component 20 and the conductive row 30, and the first liquid cooling component 20 and the conductive row 30 exchange heat through the heat-conducting structure 40. The arrangement of the heat-conducting structure 40 can improve the heat conduction efficiency from the conductive row 30 to the first liquid cooling component 20, and ensure that heat is transferred to the first liquid cooling component 20 more quickly.

[0035] In some embodiments of the present scheme, the heat-conducting structure 40 is arranged between the first liquid cooling component 20 and the single battery cell 10, and the first liquid cooling component 20 and the single battery cell 10 exchange heat through the heat-conducting structure 40. Such arrangement can improve the heat conduction efficiency from the single battery cell 10 to the first liquid cooling component 20, and ensure that heat is transferred to the first liquid cooling component 20 more quickly.

[0036] The present scheme does not limit the specific form of the heat-conducting structure. In the present embodiment, the heat-conducting structure 40 comprises heat-conducting glue. The heat-conducting glue is filled in the gap formed by the first liquid cooling component 20, the conductive row 30, and the single battery cell 10. Such arrangement makes the heat-conducting glue also have a buffering effect, which can serve as a buffer layer between the conductive row 30 and the liquid cooling plate 21, a buffer layer between the conductive row 30 and the single battery cell 10, and a buffer layer between the support portion 22 and the conductive row 30, reducing the possibility of mutual contact between the components, and playing a positioning role for the above-mentioned components, improving the structural stability of the battery system. Moreover, the heat-conducting glue also provides a certain supporting effect for the liquid cooling plate 21, further improving the stability of the liquid cooling plate 21.

[0037] Optionally, the heat-conducting glue is wrapped on the conductive row 30. The heat-conducting glue can form a protective layer to ensure reliable insulation.

[0038] In the embodiment of the present scheme, the support part 22 is bonded to the single battery 10. Bonding the support part 22 to the single battery 10 can provide better fixation, reducing displacement or damage of the first liquid cooling part 20 caused by vibration or impact. Moreover, by bonding the support part 22 to the single battery 10, the convenience of operation is stronger, allowing the single battery or the support part 22 to be replaced or repaired more easily when needed. Compared with the traditional hard connection method, bonding provides a more gentle connection method, reducing the potential damage to the battery unit 01 during installation.

[0039] As shown in FIG. 4 and FIG. 5, optionally, the liquid cooling plate 21 is provided with a first heat exchange channel 211. In the embodiment of the present scheme, the first heat exchange channel 211 is provided in plurality, and the plurality of first heat exchange channels 211 are symmetrically distributed on both sides of the support part 22 along the second direction. In this way, the uniformity of heat dissipation of the liquid cooling plate 21 to the corresponding conductive rows 30 of the two adjacent single batteries 10 can be ensured.

[0040] Specifically, the first heat exchange channel 211 extends along the first direction, and the first heat exchange channel 211 is arranged through the liquid cooling plate 21 along the first direction. In this way, the convenience of processing the first heat exchange channel 211 can be improved.

[0041] Optionally, the support part 22 is provided with a second heat exchange channel 221. The second heat exchange channel 221 is arranged through the support part 22 along the first direction, and in this way, the convenience of processing the second heat exchange channel 221 can be improved.

[0042] The present scheme does not limit the specific shape of the first heat exchange channel 211 and the second heat exchange channel 221, which can be set as a wave shape or a straight line type, etc.

[0043] Specifically, the support part 22 and the liquid cooling plate 21 are an integral molding structure. In this way, the structural stability of the first liquid cooling part 20 can be improved.

[0044] In the embodiment of the present scheme, the battery system further comprises a second liquid cooling part 80, which is arranged on the side of the battery unit 01 away from the first liquid cooling part 20, and the second liquid cooling part 80 exchanges heat with the battery unit 01. In this way, it can be ensured that the end of the battery unit 01 with the pole post exchanges heat with the first liquid cooling part 20, and the end of the battery unit 01 away from the pole post exchanges heat with the second liquid cooling part 80, so that the heat generated by the battery unit 01 can be dissipated from both the pole post end and the end away from the pole post, and more uniform heat management can be achieved.

[0045] In order to prevent electrical short circuit, ensure the electrical safety between the first liquid cooling part 20 and the battery unit 01, and ensure the electrical safety between the first liquid cooling part 20 and the conductive row 30, an insulating layer is arranged on the surface of the first liquid cooling part 20 in the present scheme.

[0046] Specifically, an insulating layer is arranged on the outer surface of the support portion 22 and the outer surface of the liquid cooling plate 21. In this way, the safety of the battery system can be further improved.

[0047] The battery system provided by the embodiments of the present application also has the advantages that the battery system can be more closely integrated with the vehicle body floor, the space utilization is optimized, the overall weight of the vehicle is reduced, and the energy efficiency and performance are improved.

[0048] Further, an adhesive layer 70 is arranged between the liquid cooling plate 21 of the first liquid cooling component 20 and the upper cover 60, and the liquid cooling plate 21 of the first liquid cooling component 20 is bonded to the vehicle body floor through the adhesive layer 70. In this way, the displacement or deformation of the liquid cooling plate 21 caused by vibration or impact during vehicle driving can be reduced, and the installation process of the liquid cooling plate 21 and the upper cover 60 can be simplified, thereby reducing the assembly time and cost.

[0049] In the present scheme, the upper portion of the liquid cooling plate 21 of the first liquid cooling component 20 is connected to the upper cover 60, and the lower portion of the support portion 22 of the first liquid cooling component 20 is connected to the top surface of the battery unit 01. The first liquid cooling component 20 has a heat exchange effect and forms a support structure from the battery unit to the upper cover 60, which helps to protect the battery unit 01 and the conductive bar 30 in a collision and reduces the safety risk.

Claims

1. A battery system, comprising: a battery unit (01) comprising a plurality of single batteries (10) arranged in a first direction, the single battery (10) comprising a battery body (11) and a pole post protruding from the battery body (11); a conductive row (30) connected with the pole post of at least one of the battery body (11); a first liquid cooling component (20) comprising a liquid cooling plate (21) and a support part (22), the liquid cooling plate (21) being located on a side of the conductive row (30) away from the single battery (10), the liquid cooling plate (21) being in heat exchange with the conductive row (30), the support part (22) being arranged between the liquid cooling plate (21) and at least one of the battery body (11) to support the liquid cooling plate (21).

2. The battery system of claim 1, wherein, A plurality of the battery unit (01) is arranged, the plurality of the battery unit (01) is distributed in a second direction, the second direction has an included angle with the first direction, and one of the first liquid cooling component (20) is correspondingly arranged between two adjacent battery units (01), and the support part (22) is connected with the single battery (10) in the two adjacent battery units (01).

3. The battery system of claim 2, wherein, The pole post comprises a first pole post (121) and a second pole post (122), the first pole post (121) and the second pole post (122) are arranged on the same side of the battery body (11), and the first pole post (121) and the second pole post (122) are distributed in the second direction; the conductive row (30) comprises a first conductive row (31) and a second conductive row (32), the first conductive row (31) and the second conductive row (32) are correspondingly arranged in each of the battery unit (01), the first conductive row (31) is connected with at least one of the first pole post (121), and the second conductive row (32) is connected with at least one of the second pole post (122).

4. The battery system of claim 3, wherein, The first conductive row (31) and the second conductive row (32) of the plurality of the battery unit (01) are alternately distributed in the second direction, and the support part (22) is located between the adjacent first conductive row (31) and the second conductive row (32).

5. The battery system of claim 4, wherein, In the direction from the battery unit (01) to the first liquid cooling component (20), the projection of the first conductive row (31) and the projection of the second conductive row (32) are located on the liquid cooling plate (21).

6. The battery system of claim 1, wherein, There is a gap between the liquid cooling plate (21) and the conductive row, and the battery unit (01) further comprises a heat conduction structure (40), the heat conduction structure (40) is arranged between the first liquid cooling component (20) and the conductive row (30), and the first liquid cooling component (20) and the conductive row (30) are in heat exchange through the heat conduction structure (40); And / or, the heat conduction structure (40) is arranged between the first liquid cooling component (20) and the single battery (10), and the first liquid cooling component (20) and the single battery (10) are in heat exchange through the heat conduction structure (40).

7. The battery system of claim 6, wherein, The heat-conducting structure (40) comprises a heat-conducting glue filled in a gap formed by the first liquid cooling component (20), the electrically-conductive row (30) and the single battery (10).

8. The battery system of claim 7, wherein, The heat-conducting glue is wrapped on the electrically-conductive row (30).

9. The battery system of claim 1, wherein, The support part (22) is bonded with the single battery (10).

10. The battery system of claim 1, wherein, The liquid cooling plate (21) is provided with a first heat exchange channel (211); and / or, the support part (22) is provided with a second heat exchange channel (221).

11. The battery system of claim 1, wherein, The support part (22) and the liquid cooling plate (21) are in an integrated molding structure.

12. The battery system of claim 1, wherein, The battery system further comprises: A second liquid cooling component (80) is arranged on a side of the battery unit (01) away from the first liquid cooling component (20), and the second liquid cooling component exchanges heat with the battery unit (01).

13. The battery system of claim 1, wherein, An insulating layer is arranged on a surface of the first liquid cooling component (20).

14. A vehicle comprising: A vehicle body comprising a floor panel; The battery system according to any one of claims 1 to 13 further comprises a box (50) having a mounting cavity (501) and a mounting opening (502), the battery unit (01) of the battery system is located in the mounting cavity (501), the first liquid cooling component (20) is arranged close to the mounting opening (502), and the floor panel seals the mounting opening (502).

15. The vehicle of claim 14, wherein, The liquid cooling plate (21) of the first liquid cooling component (20) is bonded with the floor panel.

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