Battery cell module, battery pack and vehicle

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a battery cell module, a battery pack and a vehicle, the battery cell module comprises a plurality of cooling plates and a plurality of battery cells, the battery cells are oppositely provided with two large surfaces in the thickness direction, the cooling plates are in contact with the large surfaces, the cooling plates and the battery cells are alternately arranged in the thickness direction of the battery cells, and the cooling plates and the battery cells are in contact with the large surfaces. The cooling plate comprises a horizontal part and a vertical part, a plurality of mutually communicated cooling runners are arranged in the vertical part, the vertical part is suitable for being connected with the frame, and the horizontal part is lapped between two adjacent battery cells. According to the battery cell module disclosed by the utility model, the cooling efficiency of the battery cells can be improved, the impact resistance of the battery cells is improved, and the capacity of a battery pack is not influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and specifically relates to a battery cell module, a battery pack and a vehicle. Background Art

[0002] As the energy storage device of electric vehicles, the safety performance of battery packs is of vital importance.

[0003] When a battery pack is hit from the side, the battery pack is subjected to external impact, and the impact force may even penetrate into the interior of the battery pack and damage the battery cells and other components. In order to improve the battery pack's ability to resist intrusion, the related art provides multiple beams inside the battery pack. However, the beams occupy space inside the battery pack, resulting in a reduction in the installation space and number of battery cells, affecting the capacity of the battery pack. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the utility model provides a battery cell module, which can improve the cooling efficiency of the battery cell and the capacity of the battery pack.

[0005] The embodiment of the utility model also provides a battery pack.

[0006] The embodiment of the utility model also provides a vehicle.

[0007] The battery cell module of the embodiment of the utility model includes: multiple cooling plates and multiple battery cells, the battery cells have two large surfaces arranged relatively to each other in the thickness direction, the cooling plates are in contact with the large surfaces, and the multiple cooling plates and the multiple battery cells are alternately arranged in the thickness direction of the battery cells; the cooling plate includes a horizontal portion and a vertical portion, the vertical portion has a plurality of cooling channels interconnected with each other, and the vertical portion is suitable for being connected to a frame, and the horizontal portion is overlapped between two adjacent battery cells.

[0008] In the battery cell module of the embodiment of the utility model, since the cooling plate is in contact with the large surface of the battery cell, the contact area between the cooling plate and the battery cell is increased, thereby improving the cooling efficiency of the battery cell. Multiple cooling plates and multiple battery cells are arranged alternately. The cooling plate can replace the crossbeam originally set in the battery pack, saving the internal space of the battery pack, improving the space utilization rate of the internal space of the battery pack and the battery pack capacity. In addition, the cooling plate installed on the side of the battery cell can support the battery cell, thereby improving the rigidity of the battery pack and the performance of resisting lateral impact force.

[0009] In some embodiments, the vertical portion has an inlet and an outlet, and the inlet and the outlet are arranged in parallel and spaced apart in the height direction of the plate body.

[0010] In some embodiments, the battery cell module also includes a connecting seat, the cooling plate has two connecting parts arranged relatively in the length direction of the battery cell, and the cooling plate is installed with a connecting seat in the length direction of the battery cell, one end of the connecting seat is connected to the connecting part, and the other end of the connecting seat is suitable for connecting to the frame.

[0011] In some embodiments, the connection seat has a mounting groove, the mounting groove extends along the height direction of the battery core, and the connection portion is clamped in the mounting groove.

[0012] In some embodiments, the horizontal portion and the vertical portion are integrally formed.

[0013] In some embodiments, the battery cell module further includes a bus bar, which is sequentially connected to the plurality of battery cells, and the horizontal portion is in contact with the bus bar.

[0014] In some embodiments, a heat conductive layer is provided between the bus bar and the horizontal portion.

[0015] In some embodiments, the plurality of battery cells are divided into a plurality of battery cell groups, each of the battery cell groups includes a plurality of the battery cells, each of the battery cell groups has the same number of battery cells, and the plurality of battery cells are spaced apart in the length direction thereof.

[0016] The battery pack of the embodiment of the utility model comprises: a frame having a containing space inside the frame; a battery cell module, the battery cell module being the battery cell module described in any one of the above embodiments, and the battery cell module being arranged in the containing space.

[0017] The vehicle of the embodiment of the utility model comprises the battery pack described in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a cooling plate according to an embodiment of the utility model.

[0019] Figure 2 It is a cross-sectional view of a cooling plate according to an embodiment of the utility model.

[0020] Figure 3 It is a schematic diagram of the water inlet pipe and the water outlet pipe of the embodiment of the utility model.

[0021] Figure 4 It is a schematic diagram of a battery cell according to an embodiment of the utility model.

[0022] Figure 5 It is a schematic diagram of a busbar according to an embodiment of the utility model.

[0023] Figure 6 It is a top view of the battery pack according to an embodiment of the utility model.

[0024] Figure 7 It is a top view of the connecting seat of the embodiment of the utility model.

[0025] Figure 8 It is a schematic diagram of a battery pack according to an embodiment of the present utility model.

[0026] Fig. 9 It is a schematic diagram of a connecting socket according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] Cooling plate 1, horizontal portion 11, vertical portion 12, cooling channel 121, connecting portion 13,

[0029] Frame 2, battery cell group 3, battery cell 31, bus bar 4, connecting seat 5, mounting groove 51, water inlet pipe 6, water outlet pipe 7, battery cell module 10, battery pack 20. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0031] The battery cell module 10 of the utility model embodiment includes multiple cooling plates 1 and multiple battery cells 31. The battery cells 31 have two large surfaces arranged relatively to each other in the thickness direction. The cooling plates 1 are in contact with the large surfaces. The multiple cooling plates 1 and the multiple battery cells 31 are alternately arranged in the thickness direction of the battery cells 31.

[0032] The cooling plate 1 includes a horizontal portion 11 and a vertical portion 12 . The horizontal portion 11 and the vertical portion 12 are perpendicular to each other. The vertical portion 12 has a plurality of interconnected cooling channels 121 . The vertical portion 12 is connected to the frame 2 . The horizontal portion 11 is suitable for overlapping between two adjacent battery cells 31 .

[0033] Specifically, Figures 1 to 5 As shown, the cooling plate 1 extends in the left-right direction, the horizontal portion 11 extends in the front-back direction, the vertical portion 12 extends in the left-right direction, the horizontal portion 11 is connected to the vertical portion 12, and the horizontal portion 11 is orthogonal to the vertical portion 12, and the vertical portion 12 has a plurality of cooling channels 121 interconnected with each other, and the plurality of cooling channels 121 are arranged at intervals in the left-right direction.

[0034] In the battery cell module of the embodiment of the utility model, since the cooling plate 1 is in contact with the large surface of the battery cell 31, the contact area between the cooling plate 1 and the battery cell 31 is increased, thereby improving the cooling efficiency of the battery cell 31. A plurality of cooling plates 1 and a plurality of battery cells 31 are arranged alternately. The cooling plate 1 can replace the crossbeam originally arranged in the battery pack, saving the internal space of the battery pack, improving the space utilization rate of the internal space of the battery pack and the battery pack capacity. In addition, the cooling plate 1 installed on the side of the battery cell 31 can support the battery cell 31, thereby improving the rigidity of the battery pack and the performance of resisting lateral impact force.

[0035] And by setting the vertical part 12, and the vertical part 12 has a plurality of cooling channels 121 to cool the cooling plate 1, the horizontal part 11 is connected to the vertical part 12, and the bus bar is set to be orthogonal to the horizontal part 11 and the vertical part 12 so that the horizontal part 11 can overlap the battery cell 31, and the vertical part 12 extends in the left and right direction, so that when the vehicle is hit in the left and right directions, that is, when the vehicle faces a side impact, the vertical part 12 can improve the structural strength of the battery pack 20 in the left and right directions to cope with the left and right directions. The structural strength of the battery pack 20 is improved. In some embodiments, the vertical part 12 has an inlet and an outlet, and the inlet and the outlet are arranged in parallel and spaced apart in the height direction of the cooling plate 1.

[0036] Specifically, Figure 1 and Figure 3 As shown, the vertical portion 12 has an inlet and an outlet. The vertical portion 12 has an inlet for the coolant to flow in, and the vertical portion 12 has an outlet for the coolant to flow out. The height direction of the vertical portion 12 is the up and down direction. For example, the upper portion of the vertical portion 12 is provided with an inlet for the coolant to flow in, and the lower end of the vertical portion 12 is provided with an outlet for the coolant to flow out. It can be understood that the up and down direction can be the direction of gravity, so as to facilitate the coolant to flow into the inlet above the vertical portion 12, and facilitate the coolant to flow downward along the gravity direction in the vertical portion 12, so as to increase the flow rate of the coolant and improve the circulation efficiency of the coolant.

[0037] Furthermore, multiple cooling plates 1 are connected by water pipes. For example, the water pipes are divided into a water inlet pipe 6 and a water outlet pipe 7. The water inlet pipes 6 are respectively connected to the inlets of multiple vertical parts 12 to provide coolant, and the water outlet pipes 7 are connected to the outlets of the vertical parts 12 to discharge the coolant, thereby facilitating the timely flow of coolant in and out of the cooling plate 1, thereby improving the operating stability of the battery cell module 10.

[0038] The battery cell module 10 of the embodiment of the utility model is provided with an inlet and an outlet on the vertical part 12, and the inlet and the outlet are arranged at intervals in the up and down directions, so as to facilitate the flow of coolant into and out of the vertical part 12, thereby cooling the vertical part 12 and taking away the heat transferred from the bus to the vertical part 12 through the horizontal part 11.

[0039] In some embodiments, the battery cell module also includes a connecting seat 5, and the cooling plate 1 has two connecting parts 13 arranged relatively in the length direction of the battery cell 31. The cooling plate 1 is installed with a connecting seat 5 in the length direction of the battery cell 31, one end of the connecting seat 5 is connected to the connecting part 13, and the other end of the connecting seat 5 is suitable for connecting to the frame 2.

[0040] Specifically, Figure 1 and Figure 4 As shown, the length direction of the cooling plate 1 is the left-right direction, and the left and right ends of the cooling plate 1 are respectively provided with connecting parts 13 connected to the frame 2 of the battery pack 20. For example, the connecting part 13 is provided with a first mounting hole, and the frame 2 of the battery pack 20 is provided with a second mounting hole. The cooling plate 1 and the connecting part 13 are connected by bolts passing through the first mounting hole and the second mounting hole to complete the fixing of the cooling plate 1, avoid the cooling plate 1 from being offset when the vehicle is hit, and improve the structural strength of the battery pack 20 in the left-right direction.

[0041] Furthermore, the number of the first mounting holes can be multiple, and the multiple first mounting holes are arranged at intervals along the vertical direction on the connecting portion 13, and the number of the second mounting holes is multiple, and the multiple second mounting holes correspond to the multiple first mounting holes one by one. Then, multiple bolts are used to pass through the first mounting holes and the second mounting holes to connect the connecting portion 13 to the battery plate frame 2, thereby improving the connection strength between the cooling plate 1 and the battery pack 20 frame 2, and improving the stability of the connection between the cooling plate 1 and the battery pack 20 frame 2.

[0042] Specifically, Figures 7 to 9 As shown, the connecting seat 5 is connected to the frame 2, and the connecting seat 5 is arranged at the left and right ends of the battery cell module 10, and the connecting seat 5 is connected to the connecting part 13 of the battery cell module 10, and the left and right ends of the battery cell module 10 are connected to the left and right ends of the frame 2 through the connecting seat 5.

[0043] The battery cell module of the embodiment of the utility model is convenient for fixing the battery cell module 10 by setting the connection seat 5, thereby improving the rigidity of the battery pack 20 in the left and right directions. The battery cell module 10 of the embodiment of the utility model is convenient for fixing the battery cell module 10 by setting the connection parts 13 at the left and right ends of the cooling plate 1, the connection parts 13 are connected to the connection seat 5, and the connection seat 5 is connected to the frame 2 to fix the cooling plate 1, thereby preventing the cooling plate 1 from shaking when the vehicle is driving, and preventing the cooling plate 1 from moving when the vehicle is hit from the side, thereby improving the stability of the cooling plate 1 when in use, and thereby improving the lateral structural strength of the battery pack 20.

[0044] Specifically, the connection seat 5 has a mounting groove 51 , which extends along the height direction of the frame 2 , and the connection portion 13 is clamped in the mounting groove 51 .

[0045] Specifically, Figures 7 to 9As shown, the connecting seat 5 has a mounting groove 51, which extends in the up-down direction. The connecting portion 13 extends in the up-down direction. The connecting portion 13 is clamped in the mounting groove 51 to fix the battery module 10. The mounting groove 51 and the connecting portion 13 extend in the up-down direction to increase the contact area between the connecting portion 13 and the mounting groove 51.

[0046] The battery cell module of the embodiment of the utility model is convenient for clamping the connecting part 13 in the installing groove 51 by setting the installing groove 51, so as to facilitate fixing the battery cell module 10, thereby improving the rigidity of the battery pack 20 in the left-right direction, and extending the installing groove 51 and the connecting part 13 in the up-down direction to increase the contact area between the connecting part 13 and the installing groove 51, thereby improving the stability of the connection between the battery cell module 10 and the connecting seat 5.

[0047] Furthermore, the horizontal portion 11 and the vertical portion 12 are integrally formed to improve the structural strength of the cooling plate 1 and improve the stability of the cooling plate 1 when in use.

[0048] In some embodiments, the battery cell module further includes a bus bar 4 , which is sequentially connected to the plurality of battery cells 31 , and the horizontal portion 11 is in contact with the bus bar 4 .

[0049] Specifically, Figure 5 As shown, the horizontal portion 11 is in contact with the bus 4 of the battery cell 31, and the bus 4 extends in the front-to-back direction. The bus 4 is arranged in parallel with the horizontal portion 11 to increase the contact area between the bus 4 and the horizontal portion 11. Cooling liquid flows in the cooling channel 121 to cool the vertical portion 12. The vertical portion 12 is connected to the horizontal portion 11, and the vertical portion 12 takes away the heat of the horizontal portion 11 through heat transfer to cool the horizontal portion 11. The horizontal portion 11 is in contact with the bus of the battery cell 31 to cool the bus of the battery cell 31.

[0050] The horizontal portion 11 contacts the bus 4 to cool the bus 4 of the battery cell 31 , and the horizontal portion 11 and the bus 4 extend in the same direction to increase the contact area between the bus and the horizontal portion 11 , thereby improving the cooling efficiency of the cooling plate 1 on the bus 4 of the battery cell 31 and improving the performance of the battery pack 20 .

[0051] Furthermore, a heat conductive layer is coated between the horizontal portion 11 and the bus 4 , the horizontal portion 11 is bonded to the bus through a heat conductive adhesive layer, and the heat conductive layer is suitable for heat conduction, so that the bus transfers heat to the horizontal portion 11 to achieve heat dissipation of the bus 4 .

[0052] It should be noted that the heat-conducting layer may be a heat-conducting structural adhesive, or the heat-conducting layer may be other existing adhesives, for example, the heat-conducting structural adhesive may be a heat-conducting silica gel.

[0053] In some embodiments, the multiple battery cells 31 are divided into multiple battery cell groups 3 , each battery cell group 3 includes multiple battery cells 31 , the number of battery cells 31 in each battery cell group 3 is the same, and the multiple battery cells 31 are arranged at intervals in the length direction thereof.

[0054] Specifically, the width direction of the frame 2 is the left-right direction, the battery cell group 3 includes a plurality of battery cells 31, the plurality of battery cells 31 are arranged at intervals in the left-right direction, the plurality of battery cells 31 extend along the left-right direction, and the battery cell module 10 extends along the left-right direction, the battery cell module 10 cools the plurality of battery cells 31 to prevent the battery cells 31 from overheating during operation, causing abnormal operation of the battery cells 31.

[0055] The battery cell module 10 of the utility model embodiment is provided with a plurality of battery cells 31, and the plurality of battery cells 31 are spaced apart in the left-right direction, so as to facilitate the dissipation of the heat of the battery cells 31. By arranging the battery cells 31 at intervals, the overall damage to the battery pack 20 is avoided, and the stability of the battery pack 20 during operation is improved. When a part of the battery pack 20 is damaged, the damaged battery cells 31 can be repaired and replaced, thereby reducing the repair cost.

[0056] The battery pack 20 of the embodiment of the utility model comprises a frame 2 and a battery module 10. The frame 2 has a receiving space inside, and the battery module 10 is the battery module 10 of the above embodiment. The vehicle of the embodiment of the utility model comprises the battery pack 20 as any one of the above items.

[0057] The vehicle of the embodiment of the utility model adopts the above-mentioned battery pack 20, which can improve the structural strength of the battery pack 20 in the left and right directions to cope with the collision of the vehicle in the left and right directions, improve the stability of the battery pack 20, and the cooling plate 1 can cool the bus of the battery pack 20 to avoid abnormalities caused by excessive temperature of the bus 4, thereby improving the stability and safety of the vehicle.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery cell module, characterized in that: include: A plurality of cooling plates and a plurality of battery cells, wherein the battery cells have two large surfaces arranged opposite to each other in the thickness direction thereof, the cooling plates are in contact with the large surfaces, and the plurality of cooling plates and the plurality of battery cells are alternately arranged in the thickness direction of the battery cells; The cooling plate comprises a horizontal portion and a vertical portion, wherein the vertical portion has a plurality of cooling channels interconnected with each other, and the vertical portion is suitable for being connected to a frame, and the horizontal portion is overlapped between two adjacent battery cells.

2. The battery cell module according to claim 1, characterized in that: The vertical portion is provided with an inlet and an outlet, and the inlet and the outlet are arranged in parallel and spaced apart in the height direction of the plate body.

3. The battery cell module according to claim 2, characterized in that: It also includes a connecting seat, the cooling plate has two connecting parts arranged relatively in the length direction of the battery cell, the cooling plate is installed with a connecting seat in the length direction of the battery cell, one end of the connecting seat is connected to the connecting part, and the other end of the connecting seat is suitable for connecting to the frame.

4. The battery cell module according to claim 3, characterized in that: The connection seat is provided with a mounting groove, the mounting groove extends along the height direction of the battery core, and the connection part is clamped in the mounting groove.

5. The battery cell module according to claim 1, characterized in that: The horizontal portion and the vertical portion are integrally formed.

6. The battery cell module according to any one of claims 1 to 5, characterized in that: It also includes a bus bar, which is connected to the plurality of battery cells in sequence, and the horizontal portion is in contact with the bus bar.

7. The battery cell module according to claim 6, characterized in that: A heat conducting layer is provided between the bus bar and the horizontal portion.

8. The battery cell module according to claim 1, characterized in that: The plurality of battery cells are divided into a plurality of battery cell groups, each of the battery cell groups includes a plurality of battery cells, the number of battery cells in each battery cell group is the same, and the plurality of battery cells are arranged at intervals in the length direction thereof.

9. A battery pack, characterized in that: include: A frame, wherein the frame has a receiving space inside; A battery cell module, wherein the battery cell module is the battery cell module according to any one of claims 1 to 8, and the battery cell module is arranged in the accommodating space.

10. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 9.

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