Battery cell module and new energy automobile

Abstract

The utility model provides a battery cell module and a new energy automobile, and relates to the technical field of power batteries. The battery cell module comprises at least two cylindrical battery cells, a liquid cooling assembly and a heat conduction piece, the cylindrical battery cells are adjacently arranged, and the two bottom surfaces of each cylindrical battery cell are respectively positioned on the same plane. The liquid cooling assembly is located on the same side of the at least two cylindrical battery cells and comprises a snake-shaped cold plate, and the snake-shaped cold plate is attached to the curved surfaces of the cylindrical battery cells. The heat conduction part comprises a first heat conduction part, the first heat conduction part is arranged in a gap formed between the at least two cylindrical battery cells and the snake-shaped cold plate, and three outer surfaces of the first heat conduction part are respectively attached to the outer surfaces of the cylindrical battery cells and the snake-shaped cold plate. According to the utility model, the heat conduction piece is arranged in the gap formed between the cylindrical battery cell and the snake-shaped cold plate, so that the heat dissipation area of the cylindrical battery cell is increased, and the heat dissipation efficiency of the cylindrical battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery cell module and a new energy vehicle. Background Art

[0002] Heat dissipation of power batteries is one of the key technologies in power battery technology. For cylindrical battery cells, a serpentine cold plate is generally used in contact with the side of the battery cell to dissipate heat.

[0003] However, even if a serpentine cold plate is used for heat dissipation, there will still be parts between adjacent cylindrical battery cells that are not in contact with the serpentine cold plate, and heat cannot be transferred to the serpentine cold plate well, resulting in low liquid cooling efficiency. Utility Model Content

[0004] The purpose of the present utility model is to provide a battery cell module and a new energy vehicle, which can at least partially solve the above-mentioned technical problems.

[0005] In a first aspect, the present invention provides a battery cell module, the battery cell module comprising at least two cylindrical battery cells, a liquid cooling assembly, and a heat conducting member;

[0006] The cylindrical battery cells are arranged closely together, and the two bottom surfaces of each cylindrical battery cell are located on the same plane;

[0007] The liquid cooling assembly is located on the same side of at least two of the cylindrical battery cells, and the liquid cooling assembly includes a serpentine cold plate, and the serpentine cold plate is in contact with the curved surface of the cylindrical battery cell;

[0008] The heat conducting member includes a first heat conducting member, which is arranged in the gap formed between at least two of the cylindrical battery cores and the serpentine cold plate, and the three outer surfaces of the first heat conducting member are respectively in contact with the outer surfaces of the cylindrical battery core and the serpentine cold plate.

[0009] Optionally, the first heat conducting member is a tubular structure, including three concave surfaces, namely a cold plate contact surface and two battery cell contact surfaces.

[0010] Optionally, the first heat conducting member includes an inner tube wall and an outer tube wall, and a phase change material is sealed between the inner tube wall and the outer tube wall.

[0011] Optionally, the battery cell module includes multiple rows of cylindrical battery cells, each row includes at least two cylindrical battery cells, and every two rows of cylindrical battery cells are staggered;

[0012] In each row of the cylindrical battery cells, two first heat conducting members are provided between every two adjacent cylindrical battery cells;

[0013] A serpentine cold plate is provided between every two adjacent rows of cylindrical battery cells.

[0014] Optionally, the liquid cooling assembly further includes a first collecting plate;

[0015] The first current collecting plate is provided with a plurality of openings, each of which is connected to a liquid inlet of the serpentine cold plate.

[0016] Optionally, the liquid cooling assembly further includes a second collecting plate;

[0017] The second current collecting plate is provided with a plurality of openings, each of which is connected to a liquid outlet of the serpentine cold plate.

[0018] Optionally, the heat conducting member further includes a second heat conducting member; the serpentine cold plate includes recessed portions and raised portions, the recessed portions and raised portions alternate, and each recessed portion is in contact with a curved surface of the cylindrical battery core; a phase change material is provided inside the second heat conducting member;

[0019] The second heat-conducting member includes a first heat-absorbing portion and a first heat-dissipating portion. The shape of the first heat-absorbing portion is adapted to the side surface of the cylindrical battery cell. The first heat-absorbing portion is in close contact with the side surface of the first cylindrical battery cell in the battery cell module. The first cylindrical battery cell is the cylindrical battery cell closest to the first current collecting plate or the second current collecting plate.

[0020] The first heat dissipation portion is fixed on a side of the serpentine cold plate close to the cylindrical battery core;

[0021] The first heat dissipation portion and the first heat absorption portion are integrally formed.

[0022] Optionally, the heat conducting member further includes a third heat conducting member; the third heat conducting member is arranged opposite to the second heat conducting member, and the size of the third heat conducting member is smaller than that of the second heat conducting member;

[0023] Phase change material is provided inside the third heat conducting member;

[0024] The third heat-conducting member includes a second heat-absorbing portion and a second heat-dissipating portion, wherein the shape of the second heat-absorbing portion is adapted to the side surface of the cylindrical battery core, and the second heat-absorbing portion is in close contact with the side surface of the first cylindrical battery core;

[0025] The second heat dissipation portion is fixed on a side of the serpentine cold plate close to the cylindrical battery core;

[0026] The second heat dissipation portion and the second heat absorption portion are integrally formed.

[0027] Optionally, in the cross section of the battery cell module, the length of each cylindrical battery cell in contact with the serpentine cold plate and the heat conducting member is 89% of the circumference of the cross section of the cylindrical battery cell.

[0028] In a second aspect, the present invention provides a new energy vehicle, which includes the battery cell module described in any one of the above items.

[0029] The battery module and new energy vehicle provided by the present invention have the following beneficial effects:

[0030] By placing a heat conductor in the gap between every two adjacent cylindrical cells and the serpentine cold plate in the cylindrical cell module, the side portions of the cylindrical cells not in direct contact with the serpentine cold plate can indirectly contact the serpentine cold plate through the heat conductor. When the cell module is operating, the heat generated can be transferred to the serpentine cold plate through the heat conductor, thereby increasing the heat dissipation area of the cylindrical cells and improving their heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of a portion of the structure of a battery cell module provided in an embodiment of the present utility model;

[0033] Figure 2 A schematic structural diagram of a first heat conducting member provided in an embodiment of the present utility model;

[0034] Figure 3 A schematic diagram of a battery cell module provided in an embodiment of the present utility model;

[0035] Figure 4 A schematic diagram of a current collecting plate provided in an embodiment of the present utility model;

[0036] Figure 5 A cross-sectional schematic diagram of a battery cell module provided in an embodiment of the present utility model.

[0037] Icons: 01-battery cell module; 10-cylindrical battery cell; 101-first cylindrical battery cell; 11-liquid cooling assembly; 111-serpentine cold plate; 12-heat conducting member; 121-first heat conducting member; 1211-cold plate contact surface; 1212-battery cell contact surface; 1213-phase change material; 122-second heat conducting member; 1221-first heat absorbing part; 1222-first heat dissipating part; 123-third heat conducting member; 1231-second heat absorbing part; 1232-second heat dissipating part; 1111-recessed part; 1112-raised part; 112-first current collecting plate; 113-second current collecting plate. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use, or are the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] Furthermore, the terms “first,” “second,” “third,” etc., are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0043] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0044] Existing cylindrical battery module heat dissipation methods typically use a serpentine cold plate placed against the sides of the battery cells. Coolant flowing through the plate removes heat transferred from the sides of the cells. However, the cold plate doesn't completely align with the sides of the cells, creating a gap between them and limiting the effective heat dissipation area.

[0045] Based on the above situation, the embodiments of this specification provide a battery cell module and a new energy vehicle, which can effectively alleviate the above technical problems.

[0046] See also Figure 1 This embodiment provides a battery cell module 01 , which includes at least two cylindrical battery cells 10 , a liquid cooling assembly 11 and a heat conducting member 12 .

[0047] The cylindrical battery cells 10 are arranged adjacent to each other, and the two bottom surfaces of each cylindrical battery cell 10 are located on the same plane.

[0048] The liquid cooling assembly 11 is located on the same side of at least two of the cylindrical battery cells 10 . The liquid cooling assembly 11 includes a serpentine cold plate 111 . The serpentine cold plate 111 fits the curved surface of the cylindrical battery cells 10 .

[0049] The heat conducting member 12 includes a first heat conducting member 121, which is arranged in the gap formed between at least two of the cylindrical battery cores 10 and the serpentine cold plate 111, and the three outer surfaces of the first heat conducting member 121 are respectively in contact with the outer surfaces of the cylindrical battery core 10 and the serpentine cold plate 111.

[0050] like Figure 1As shown, the cylindrical battery cells 10 in the same row are arranged in sequence, and the serpentine cold plate 111 in the liquid cooling assembly 11 is located on the same side of the cylindrical battery cells 10. One side of the serpentine cold plate 111 is in contact with the side of the cylindrical battery cells 10, and can directly absorb the heat generated by the cylindrical battery cells 10. In addition, the first heat conductor 121 absorbs the heat generated by the cylindrical battery cells 10 through the surface in contact with the cylindrical battery cells 10, and then transfers the absorbed heat to the coolant in the serpentine cold plate 111 through the surface in contact with the serpentine cold plate 111. The size of the first heat conductor 121 can be set according to the size of the serpentine cold plate 111 in the battery module 01 and the size of the cylindrical battery cells 10, and this embodiment of the utility model does not specifically limit this.

[0051] Optionally, the first heat conducting member 121 is a tubular structure, including three concave surfaces, namely a cold plate contact surface 1211 and two battery cell contact surfaces 1212 .

[0052] In order to save materials, the first heat conducting member 121 can be Figure 2 The tubular structure shown is hollow in the middle, and two of its three concave surfaces are battery cell contact surfaces 1212 that fit with the cylindrical battery cell 10 , and the other is a cold plate contact surface 1211 that fits with the serpentine cold plate 111 .

[0053] Optionally, the first heat conducting member 121 includes an inner tube wall and an outer tube wall, and a phase change material 1213 is sealed between the inner tube wall and the outer tube wall.

[0054] Still Figure 2 For example, a sealed hollow interlayer can be provided between the inner tube wall and the outer tube wall of the tubular first heat conductor 121, and the phase change material 1213 is sealed in the interlayer. Since the specific heat capacity of the phase change material 1213 is large, more heat can be absorbed by the phase change material 1213 during heat conduction to be transferred to the serpentine cold plate 111.

[0055] Optionally, the battery cell module 01 includes multiple rows of cylindrical battery cells 10 , each row includes at least two cylindrical battery cells 10 , and every two rows of cylindrical battery cells 10 are staggered.

[0056] In each row of the cylindrical battery cells 10 , two first heat conducting members 121 are disposed between every two adjacent cylindrical battery cells 10 . One serpentine cold plate 111 is disposed between every two adjacent rows of the cylindrical battery cells 10 .

[0057] like Figure 3As shown, when there are multiple cylindrical battery cells 10, in order to save battery pack space, the cylindrical battery cells 10 can be divided into multiple rows, with each two adjacent rows of cylindrical battery cells 10 arranged in a staggered stack. A serpentine cold plate 111 is placed between each two adjacent rows of cylindrical battery cells 10, and two first heat conducting members 121 are placed between each two adjacent cylindrical battery cells 10 in each row of cylindrical battery cells 10. This allows the heat generated by each cylindrical battery cell 10 to be efficiently dissipated.

[0058] Optionally, the liquid cooling assembly 11 further includes a first current collecting plate 112 . The first current collecting plate 112 is provided with a plurality of openings, each of which is connected to a liquid inlet of the serpentine cold plate 111 .

[0059] Optionally, the liquid cooling assembly 11 further includes a second current collecting plate 113 . The second current collecting plate 113 is provided with a plurality of openings, each of which is connected to a liquid outlet of the serpentine cold plate 111 .

[0060] like Figure 4 As shown, a first current collecting plate 112 and a second current collecting plate 113 are respectively provided at both ends of each serpentine cold plate 111. The liquid inlet of each serpentine cold plate 111 is connected to a corresponding opening on the first current collecting plate 112, and the liquid outlet of each serpentine cold plate 111 is connected to a corresponding opening on the second current collecting plate 113. When coolant is introduced, the coolant reaches the first current collecting plate 112 and flows from the openings on the first current collecting plate 112 into the liquid inlets of each serpentine cold plate 111. After flowing through the serpentine cold plate 111 and undergoing sufficient heat exchange with the cylindrical battery cells 10 and the heat conducting member 12, the coolant flows out from the liquid outlet of each serpentine cold plate 111, reaches the second current collecting plate 113, and then flows out from the second current collecting plate 113 into the coolant pipeline.

[0061] Optionally, the heat conducting member 12 further includes a second heat conducting member 122. The serpentine cold plate 111 includes recessed portions 1111 and raised portions 1112, the recessed portions 1111 alternating with the raised portions, and each recessed portion 1111 aligns with the curved surface of one of the cylindrical battery cells 10. A phase change material 1213 is disposed within the second heat conducting member 122.

[0062] The second heat-conducting member 122 includes a first heat-absorbing portion 1221 and a first heat-dissipating portion 1222. The shape of the first heat-absorbing portion 1221 is adapted to the side surface of the cylindrical battery cell 10. The first heat-absorbing portion 1221 is in close contact with the side surface of the first cylindrical battery cell 101 in the battery cell module 01. The first cylindrical battery cell 101 is the cylindrical battery cell 10 closest to the first current collecting plate 112 or the second current collecting plate 113.

[0063] The first heat dissipation portion 1222 is fixed to a side of the serpentine cold plate 111 close to the cylindrical battery core 10. The first heat dissipation portion 1222 and the first heat absorption portion 1221 are integrally formed.

[0064] like Figure 3 As shown, the raised portion of the serpentine cold plate 111 is located in the gap between the two cylindrical battery cells 10, while the recessed portion 1111 of the serpentine cold plate 111 is in direct contact with the side of the cylindrical battery cell 10. The cylindrical battery cell 10 located at the edge of each row and closest to the first current collecting plate 112 or the second current collecting plate 113 is defined as the first cylindrical battery cell 101. Because the gap between the first cylindrical battery cell 101 and the first current collecting plate 112 / second current collecting plate 113 is insufficient to accommodate another cylindrical battery cell 10, a second thermally conductive member 122 with a different shape from the first thermally conductive member 121 is provided. The heat dissipation portion (i.e., the first heat dissipation portion 1222) of the second thermally conductive member 122 is secured to the serpentine cold plate 111, with the first heat absorbing portion 1221 of the second thermally conductive member 122 in close contact with the side of the first cylindrical battery cell 101. In this way, the second heat conducting member 122 can not only effectively transfer the heat of the first cylindrical battery core 101 , but also fix the first cylindrical battery core 101 .

[0065] Optionally, the heat conducting member 12 further includes a third heat conducting member 123 ; the third heat conducting member 123 is arranged opposite to the second heat conducting member 122 , and the size of the third heat conducting member 123 is smaller than that of the second heat conducting member 122 .

[0066] Phase change material 1213 is disposed inside the third heat conducting member 123. The third heat conducting member 123 includes a second heat absorbing portion 1231 and a second heat dissipating portion 1232. The shape of the second heat absorbing portion 1231 is adapted to the side surface of the cylindrical battery core 10. The second heat absorbing portion 1231 is in close contact with the side surface of the first cylindrical battery core 101.

[0067] The second heat dissipation portion 1232 is fixed to a side of the serpentine cold plate 111 close to the cylindrical battery core 10. The second heat dissipation portion 1232 and the second heat absorption portion 1231 are integrally formed.

[0068] Still Figure 3For example, to further dissipate heat from the first cylindrical battery cell 101 and further secure the first cylindrical battery cell 101, a third heat conducting member 123 including a second heat absorbing portion 1231 and a second heat dissipating portion 1232 may be provided. The second heat dissipating portion 1232 of the third heat conducting member 123 is secured to the serpentine cold plate 111, and the second heat absorbing portion 1231 of the third heat conducting member 123 is brought into close contact with the side surface of the first cylindrical battery cell 101. This allows the first heat conducting member 121, the second heat conducting member 122, the third heat conducting member 123, and the serpentine cold plate 111 to cooperate in dissipating heat from the first cylindrical battery cell 101.

[0069] Optionally, in the cross section of the battery module 01 , the length of each cylindrical battery cell 10 in contact with the serpentine cold plate 111 and the heat conductor 12 is 89% of the circumference of the cross section of the cylindrical battery cell 10 .

[0070] like Figure 5 As shown, in the cross section of the battery module 01, for each cylindrical battery cell 10, the side area in contact with the serpentine cold plate 111 and the heat conductor 12 can account for 320 / 360 of the total side area, that is, Figure 5 The 320° angle shown above greatly improves the heat dissipation efficiency of the cylindrical battery cell 10 .

[0071] Based on the same inventive concept, the present invention provides a new energy vehicle, which includes the battery cell module 01 described in any one of the above items.

[0072] Regarding the above-mentioned new energy vehicle, the specific functions and structures of each part have been described in detail in the embodiment of the battery module 01 provided in this specification, and will not be elaborated here.

[0073] The above solution in the embodiment of the present utility model has at least the following beneficial effects:

[0074] By placing a heat conductor in the gap between every two adjacent cylindrical cells and the serpentine cold plate in the cylindrical cell module, the side portions of the cylindrical cells not in direct contact with the serpentine cold plate can indirectly contact the serpentine cold plate through the heat conductor. When the cell module is operating, the heat generated can be transferred to the serpentine cold plate through the heat conductor, thereby increasing the heat dissipation area of the cylindrical cells and improving their heat dissipation efficiency.

[0075] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery cell module, characterized in that: The battery cell module (01) comprises at least two cylindrical battery cells (10), a liquid cooling assembly (11) and a heat conducting member (12); The cylindrical battery cells (10) are arranged closely together, and the two bottom surfaces of each cylindrical battery cell (10) are located on the same plane; The liquid cooling assembly (11) is located on the same side of at least two of the cylindrical battery cells (10), and the liquid cooling assembly (11) comprises a serpentine cold plate (111), and the serpentine cold plate (111) is fitted with the curved surface of the cylindrical battery cell (10); The heat conducting member (12) comprises a first heat conducting member (121), the first heat conducting member (121) being arranged in a gap formed between at least two of the cylindrical battery cores (10) and the serpentine cold plate (111), and three outer surfaces of the first heat conducting member (121) respectively fitting with outer surfaces of the cylindrical battery cores (10) and the serpentine cold plate (111).

2. The battery cell module according to claim 1, wherein: The first heat conducting member (121) is a tubular structure, comprising three concave surfaces, namely a cold plate contact surface (1211) and two battery cell contact surfaces (1212).

3. The battery cell module according to claim 2, wherein: The first heat conducting member (121) comprises an inner tube wall and an outer tube wall, and a phase change material (1213) is sealed between the inner tube wall and the outer tube wall.

4. The battery cell module according to claim 3, wherein: The battery cell module (01) comprises a plurality of rows of cylindrical battery cells (10), each row comprising at least two cylindrical battery cells (10), and every two rows of cylindrical battery cells (10) are staggered; In each row of the cylindrical battery cores (10), two first heat conducting members (121) are provided between every two adjacent cylindrical battery cores (10); A serpentine cold plate (111) is provided between every two adjacent rows of cylindrical battery cells (10).

5. The battery cell module according to claim 4, wherein: The liquid cooling assembly (11) further includes a first collecting plate (112); The first current collecting plate (112) is provided with a plurality of openings, each opening being connected to a liquid inlet of one of the serpentine cold plates (111).

6. The battery cell module according to claim 5, wherein: The liquid cooling assembly (11) further includes a second collecting plate (113); The second current collecting plate (113) is provided with a plurality of openings, each opening being connected to a liquid outlet of one of the serpentine cold plates (111).

7. The battery cell module according to claim 6, wherein: The heat conducting member (12) further includes a second heat conducting member (122); the serpentine cold plate (111) includes a recessed portion (1111) and a raised portion (1112), the recessed portion (1111) and the raised portion (1112) alternating, and each recessed portion (1111) is fitted with a curved surface of a cylindrical battery core (10); a phase change material (1213) is provided inside the second heat conducting member (122); The second heat-conducting member (122) comprises a first heat-absorbing portion (1221) and a first heat-dissipating portion (1222); the shape of the first heat-absorbing portion (1221) is adapted to the side surface of the cylindrical battery core (10); the first heat-absorbing portion (1221) is in close contact with the side surface of the first cylindrical battery core (101) in the battery core module (01); the first cylindrical battery core (101) is the cylindrical battery core (10) closest to the first current collecting plate (112) or the second current collecting plate (113); The first heat dissipation portion (1222) is fixed to a side of the serpentine cold plate (111) close to the cylindrical battery core (10); The first heat dissipation portion (1222) and the first heat absorption portion (1221) are integrally formed.

8. The battery cell module according to claim 7, wherein: The heat conducting member (12) further includes a third heat conducting member (123); the third heat conducting member (123) is arranged opposite to the second heat conducting member (122), and the size of the third heat conducting member (123) is smaller than the size of the second heat conducting member (122); Phase change material (1213) is provided inside the third heat conducting member (123); The third heat-conducting member (123) comprises a second heat-absorbing portion (1231) and a second heat-dissipating portion (1232); the shape of the second heat-absorbing portion (1231) is adapted to the side surface of the cylindrical battery core (10); and the second heat-absorbing portion (1231) is in close contact with the side surface of the first cylindrical battery core (101); The second heat dissipation portion (1232) is fixed to a side of the serpentine cold plate (111) close to the cylindrical battery core (10); The second heat dissipation portion (1232) and the second heat absorption portion (1231) are integrally formed.

9. The battery cell module according to claim 1, wherein: In the cross section of the battery module (01), the length of each cylindrical battery core (10) in contact with the serpentine cold plate (111) and the heat conducting member (12) is 89% of the circumference of the cross section of the cylindrical battery core (10).

10. A new energy vehicle, characterized in that: The new energy vehicle comprises the battery cell module (01) according to any one of claims 1 to 9.

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