Battery pack and battery system

Abstract

The utility model provides a battery pack and a battery system, the battery pack comprises a top cover, at least one avoiding groove is formed on the top cover, and the avoiding groove is suitable for accommodating a cross beam; the avoiding groove is formed in the top cover of the battery pack, and the avoiding groove and the cross beam are oppositely arranged to accommodate the cross beam, so that the space utilization rate of the whole vehicle is improved, and the size of the battery pack can be increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to a battery pack, battery system. BACKGROUND

[0002] In the related art, the current domestic commercial vehicle battery system has a small electric quantity and a short cruising range, which cannot meet the long-distance transportation demand; the voltage platform of the current vehicle battery system is small, generally being a 600V voltage platform, while the charging of the charging pile is generally an 800V voltage platform, so that the loss of the line is large during charging, causing energy loss; the current domestic commercial vehicle has a long fast-charging time, generally being more than 1h, wasting a certain amount of time; the heat exchange efficiency of the current domestic commercial vehicle heat management type is not high, and the temperature rise and temperature difference of the battery system are high; and the existing battery pack and the cross beam of the vehicle interfere with each other, so that the size of the battery pack is difficult to be large, thereby causing the battery pack to be difficult to meet the above demand.

[0003] Therefore, the battery pack in the related art has the technical problem of interference between the top cover and the cross beam of the vehicle. SUMMARY

[0004] Embodiments of the utility model provide a battery pack and a battery system, which can improve the technical problem of interference between the top cover and the cross beam of the vehicle in the prior art.

[0005] In a first aspect, embodiments of the utility model provide a battery pack for installation on a vehicle, the vehicle comprising at least one cross beam, the battery pack comprising:

[0006] a top cover formed with at least one avoiding groove adapted to accommodate the cross beam.

[0007] In an embodiment, the depth of the avoiding groove ranges from 195mm to 250mm. In an embodiment, along the length direction of the battery pack, the width of the avoiding groove ranges from 98mm to 120mm.

[0008] In an embodiment, the cooling assembly comprises at least two cooling sub-assemblies, wherein each cooling sub-assembly is arranged in a staggered manner with the corresponding avoiding groove.

[0009] In an embodiment, the cooling assembly further comprises at least one connecting pipe, each connecting pipe being connected between the pipelines of two adjacent cooling sub-assemblies, the extension direction of the connecting pipe intersecting the extension direction of the corresponding avoiding groove; wherein the cross-sectional area of each connecting pipe is smaller than the cross-sectional area of the pipeline of the corresponding cooling sub-assembly.

[0010] In an embodiment, the battery pack comprises at least two groups of battery cells, the group of battery cells adjacent to one side of the top cover comprises at least two sub-groups of battery cells, and gaps are formed between adjacent sub-groups of battery cells.

[0011] In an embodiment, two adjacent groups of battery cells are connected in parallel with each other, and each group of battery cells comprises n battery cells connected in series, wherein 225≤n≤528.

[0012] In an embodiment, the rated capacity of each battery cell ranges from 185 ampere-hours to 206 ampere-hours, so that the rated capacity of the battery pack ranges from 300 kilowatt-hours to 350 kilowatt-hours.

[0013] In an embodiment, the battery pack further comprises a box body, and the group of battery cells comprises a plurality of battery cells, wherein a buffer is arranged between adjacent battery cells and between the group of battery cells and the box body, and the thickness of the buffer ranges from 0.8 millimeter to 2 millimeters.

[0014] In a second aspect, an embodiment of the utility model provides a battery system comprising the battery pack according to any one of the above embodiments.

[0015] In an embodiment, the distance between two adjacent battery packs ranges from 30 millimeters to 100 millimeters.

[0016] The embodiment of the utility model has the advantages of:

[0017] In the embodiment of the utility model, the avoiding groove is arranged on the top cover of the battery pack, the avoiding groove is arranged opposite to the cross beam to accommodate the cross beam, the interference between the battery pack and the cross beam is avoided, the battery pack can be made larger in size to meet more requirements, and the technical problem of interference between the top cover of the battery pack and the cross beam of the vehicle is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 is the schematic diagram of explosion of the battery pack provided by the embodiment of the utility model;

[0020] Figure 2 is the structural schematic diagram of the top cover in the battery pack provided by the embodiment of the utility model;

[0021] Figure 3It is the structural schematic view of a plurality of battery cells and buffer pieces in the battery pack provided by the embodiment of the utility model.

[0022] Figure 4 It is the structural schematic view of the battery system provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as 'upper' and 'lower' generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the drawing direction in the drawings. And 'inner' and 'outer' refer to the contour of the device.

[0024] In addition, the terms 'first','second' and similar words do not represent any order, quantity or importance, but are only used to distinguish different technical features. The term 'a plurality of' and similar words represent two or more, unless otherwise explicitly limited.

[0025] Please refer to Figure 1 and Figure 2 The battery pack 1 provided by the embodiment of the utility model comprises a top cover 2, the top cover 2 is formed with at least one avoiding groove 3, and the avoiding groove 3 is suitable for accommodating the cross beam.

[0026] The battery pack 1 is installed on a vehicle, and the vehicle comprises at least one cross beam.

[0027] In the embodiment, by arranging the avoiding groove 3 on the top cover 2 of the battery pack 1, the avoiding groove 3 is arranged opposite to the cross beam to accommodate the cross beam, so that the space utilization of the whole vehicle is improved, and the size of the battery pack 1 can be increased.

[0028] The technical solutions of the application will be described in combination with specific embodiments.

[0029] In an embodiment, please refer to Figure 2 The depth of the avoiding groove 3 ranges from 195mm to 250mm.

[0030] The depth of the avoiding groove 3 can be any one of 195mm, 210mm, 235mm and 250mm.

[0031] It can be understood that when the depth of the avoidance groove 3 is less than 195 mm, the depth of the avoidance groove 3 is too shallow to effectively avoid the cross beam; when the depth of the avoidance groove 3 is greater than 250 mm, the depth of the avoidance groove 3 is too deep, so that the copper bar and the wire harness cannot pass through.

[0032] In the embodiment, by limiting the depth of the avoidance groove 3, the avoidance groove 3 can effectively avoid the cross beam without affecting the passing of the copper bar and the wire harness from below the avoidance groove 3 and realizing the electrical connection in the battery pack 1.

[0033] In an embodiment, along the length direction of the battery pack 1, the width of the avoidance groove 3 ranges from 98 mm to 120 mm.

[0034] The width of the avoidance groove 3 can be any one of 98 mm, 103 mm, 115 mm, and 120 mm.

[0035] It can be understood that when the width of the avoidance groove 3 is less than 98 mm, the width of the avoidance groove 3 is too narrow to effectively avoid the cross beam; when the width of the avoidance groove 3 is greater than 120 mm, the width of the avoidance groove 3 is too wide to affect the arrangement of other components in the battery pack 1.

[0036] In an embodiment, referring to Figure 1 , the cooling assembly 4 includes at least two cooling sub-parts 41, wherein each cooling sub-part 41 is arranged in a staggered manner with the corresponding avoidance groove 3.

[0037] The cooling assembly 4 is extruded, and the internal flow channel can be S-shaped.

[0038] The cooling assembly 4 further includes a heat-conducting gel, which covers the top of the battery cell 501 to realize heat exchange between the cooling assembly 4 and the battery cell 501.

[0039] The cooling assembly 4 is arranged on the box body by screw locking.

[0040] The cooling mode of the cooling assembly 4 can be liquid cooling.

[0041] It can be understood that by dividing the cooling assembly 4 into at least two cooling sub-parts 41 and arranging the cooling sub-parts 41 in a staggered manner with the avoidance groove 3, the arrangement of the cooling sub-parts 41 is not affected by the avoidance groove 3, so that the cooling sub-parts 41 have a larger arrangement space in the battery pack 1, thereby greatly improving the heat exchange efficiency of the cooling sub-parts 41.

[0042] In an embodiment, referring to Figure 1The cooling assembly 4 further comprises at least one connecting pipe 42, each connecting pipe 42 being communicated between the pipelines of two adjacent cooling subparts 41, and the extending direction of the connecting pipe 42 intersects with the extending direction of the corresponding avoiding groove 3; wherein the cross-sectional area of each connecting pipe 42 is smaller than the cross-sectional area of the pipeline of the corresponding cooling subpart 41.

[0043] The connecting pipe 42 is arranged below the avoiding groove 3.

[0044] It can be understood that heat exchange is realized between the adjacent cooling subparts 41 through the connecting pipe 42 to form a whole, and the connecting pipe 42 needs to pass through below the avoiding groove 3, therefore, by setting the cross-sectional area of the connecting pipe 42 to be smaller than the cross-sectional area of the pipeline of the corresponding cooling subpart 41, on the one hand, it is beneficial for the connecting pipe 42 to pass through below the avoiding groove 3 without being affected by the avoiding groove 3, and on the other hand, it can make the cross-sectional area of the pipeline of the cooling subpart 41 larger, thereby improving the heat exchange efficiency of the cooling subpart 41.

[0045] In an embodiment, referring to Figure 1 The battery pack 1 comprises at least two cell groups 5, the cell group 5 close to the top cover 2 comprises at least two cell subparts 51, and the gap 52 is formed between the adjacent cell subparts 51, wherein the gap 52 is arranged in position with the corresponding avoiding groove 3.

[0046] The distance between the gap 52 and the avoiding groove 3 is equal along the length direction of the battery pack 1.

[0047] It can be understood that the cell group 5 close to the top cover 2 is arranged in position with the avoiding groove 3 between the adjacent cell subparts 51, so that the two cell groups 5 are arranged in position with the avoiding groove 3, thereby avoiding the influence of the avoiding groove 3 on the arrangement of the cell group 5 in the battery pack 1.

[0048] In an embodiment, the adjacent two cell groups 5 are connected in parallel, and each cell group 5 comprises n cell 501 connected in series, wherein 225≤n≤528.

[0049] It can be understood that when two cell groups 5 are arranged in the battery pack 1, the total number of the cells 501 in the battery pack 1 ranges from 450 to 1056.

[0050] It can be understood that by arranging the avoiding groove 3 on the top cover 2 of the battery pack 1, the avoiding groove 3 avoids the cross beam of the vehicle, thereby the volume of the battery pack 1 can be made larger, and more cells 501 can be arranged to increase the power of the battery pack 1.

[0051] It should be noted that the number of the cell groups 5 cannot be one, and when there is only one cell group 5, the voltage of the single cell group 5 is too large to burn out.

[0052] In an embodiment, the rated capacity of each battery cell 501 ranges from 185 ampere-hours to 206 ampere-hours, so that the rated power of the battery pack 1 ranges from 300 kilowatt-hours to 350 kilowatt-hours.

[0053] It can be understood that by increasing the rated capacity of a single battery cell 501, the number of battery cells 501 required to achieve the same rated power of the battery pack 1 is less. Since a certain safety distance needs to be provided between adjacent battery cells 501, the gap 52 between adjacent battery cells 501 can be reduced by using a smaller number of battery cells 501, thereby improving the space utilization in the battery pack 1 and further improving the rated power of the battery pack 1.

[0054] In an embodiment, referring to Figure 1 and Figure 3 The battery pack 1 further comprises a box, and the battery cell group 5 comprises a plurality of battery cells 501, wherein a buffer 8 is arranged between adjacent battery cells 501 and between the battery cell group 5 and the box, and the thickness of the buffer 8 ranges from 0.8 millimeters to 2 millimeters.

[0055] The thickness of the buffer 8 can be any one of 0.8 millimeters, 1.2 millimeters, 1.6 millimeters, and 2 millimeters.

[0056] It can be understood that within the range of 0.8 millimeters to 2 millimeters of the thickness of the buffer 8, the smaller the thickness of the buffer 8, the less space the buffer 8 occupies, which is beneficial to improve the space utilization in the battery pack 1, so that more battery cells 501 can be arranged, thereby realizing the design of a large-power battery pack 1.

[0057] It can be understood that within the range of 0.8 millimeters to 2 millimeters of the thickness of the buffer 8, the greater the thickness of the buffer 8, the better the buffering effect, which can avoid short circuiting of the battery cells 501 or damage due to collision.

[0058] In an embodiment, the rated voltage of the battery single box ranges from 750 volts to 850 volts.

[0059] The rated voltage of the battery single box can be any one of 750 volts, 800 volts, and 850 volts.

[0060] It can be understood that by increasing the voltage of the battery single box to 750 volts to 850 volts, the voltage of the battery system 9 also reaches 750 volts to 850 volts, thereby effectively reducing the charging loss and solving the problem of low voltage platform of vehicles on the market, further reducing the problem of charging loss.

[0061] In an embodiment, the time required for charging the battery system 9 from 20% to 80% ranges from less than or equal to 30 minutes.

[0062] It can be understood that the time required for charging the battery system 9 from 20% to 80% is less than or equal to 30 minutes, which improves the charging efficiency of the battery system 9, thereby solving the problem of long charging time on the market.

[0063] In an embodiment, referring to Figure 1 , the battery pack 1 further comprises an upper box 6, a lower box 7, and a locking structure for connecting the upper box 6 and the lower box 7.

[0064] The locking structure can comprise a bolt and a positioning pin, and the upper box 6 is locked and installed with the lower box 7 through the bolt and is guided and positioned through the positioning pin.

[0065] The upper box 6 and / or the lower box 7 are made of aluminum alloy structure, and the lower box 7 can be formed by extrusion.

[0066] The upper box 6 and / or the lower box 7 are respectively bonded with the battery cell 501 through a heat-conducting adhesive material, so as to improve the strength of the battery pack 1 and simultaneously serve as a carrier for accommodating the battery cell 501.

[0067] The upper box 6 and / or the lower box 7 are further provided with an explosion-proof valve, so as to avoid excessive pressure in the battery pack 1.

[0068] The upper box 6 and / or the lower box 7 are further provided with a lifting hole, which is used for lifting and simultaneously ensures that the solid protection level of the battery system 9 is 6 and the liquid protection level is 7.

[0069] It can be understood that the connection between the upper box 6 and the lower box 7 is stable through the locking structure, and meanwhile, the installation and disassembly are facilitated.

[0070] In an embodiment, referring to Figure 1 , the outer side of the upper box 6 and / or the lower box 7 can be pasted with thermal insulation cotton.

[0071] It can be understood that the thermal insulation performance of the battery pack 1 is improved and the energy loss of the battery pack 1 is reduced by pasting the thermal insulation cotton on the outer side of the upper box 6 and / or the lower box 7.

[0072] In an embodiment, referring to Figure 1 , the length of the battery pack 1 ranges from 2450 mm to 2600 mm, the width of the battery pack 1 ranges from 1100 mm to 1300 mm, and the height of the battery pack 1 ranges from 500 mm to 600 mm.

[0073] The length of the battery pack 1 can be any one of 2450 mm, 2469 mm, 2500 mm, 2550 mm, and 2600 mm.

[0074] The width of the battery pack 1 can be any one of 1100 mm, 1200 mm, or 1300 mm.

[0075] The height of the battery pack 1 can be any one of 500 mm, 544 mm, or 600 mm.

[0076] It can be understood that the larger the size of the battery pack 1, at least one of the length, width, and height, the more battery cells 501 can be arranged in the battery pack 1, thereby facilitating obtaining a battery pack 1 with large capacity, high charging voltage, and fast charging efficiency.

[0077] In an embodiment, the draft angle of the avoidance groove 3 ranges from 3 degrees to 5 degrees.

[0078] The draft angle of the avoidance groove 3 can be any one of 3 degrees, 4 degrees, or 5 degrees.

[0079] The top cover 2 is an insulator structure, which is used to improve the strength of the battery system 9 to ensure that the protection level of the battery system 9 meets the solid-state protection level of 6 and the liquid-state protection level of greater than or equal to 7.

[0080] It can be understood that when the draft angle of the avoidance groove 3 is less than 3 degrees or greater than 5 degrees, the space inside the battery pack 1 is reduced.

[0081] In the embodiment, by setting the draft angle of the avoidance groove 3 to range from 3 degrees to 5 degrees, the space inside the battery pack 1 is larger, and more battery cells 501 can be arranged.

[0082] In an embodiment, referring to Figure 1 In a battery pack 1, the arrangement of the plurality of battery cells 501 is in the form of 2P240S.

[0083] The rated capacity of each battery cell 501 can be 206 ampere-hours.

[0084] The rated capacity of a single battery pack 1 can be 318.39 kilowatt-hours, and the rated voltage of a single battery pack 1 can be 772.8 volts.

[0085] 2P means that two groups of battery cells 501 are connected in parallel to each other, and 240S means that any one group of battery cells 501 includes 240 battery cells 501 connected in series to each other.

[0086] In a second aspect, referring to Figure 4 The embodiment of the utility model provides a battery system 9, which comprises the battery pack 1 of any one of the above embodiments.

[0087] The battery system 9 can include a plurality of battery packs 1, and the battery system 9 is composed of the plurality of battery packs 1, so that the installation and dismounting are facilitated.

[0088] In an embodiment, the interval distance between the two adjacent battery packs 1 ranges from 30 mm to 100 mm.

[0089] The interval distance between the two adjacent battery packs 1 can be any one of 30 mm, 50 mm, 80 mm, and 100 mm.

[0090] It can be understood that when the interval distance between the two battery packs 1 is less than 30 mm, the two adjacent battery packs 1 are prone to collision; and when the interval distance between the two battery packs 1 is greater than 100 mm, the space utilization of the battery system 9 is low.

[0091] An embodiment of the utility model provides a battery system 9, including the battery pack 1 of any one of the above embodiments.

[0092] An embodiment of the utility model provides a kind of electric equipment, including the battery pack 1 of any one of the above embodiments, or, including the battery system 9 of the above embodiment.

[0093] The electric equipment can be a vehicle, which can be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and the present disclosure does not make specific limitations thereon.

[0094] The utility model provides a kind of battery pack 1, battery pack 1 includes top cover 2, top cover 2 is formed with at least one avoiding groove 3, avoiding groove 3 is suitable for accommodating crossbeam;By setting avoiding groove 3 in the top cover 2 of battery pack 1, avoiding groove 3 is arranged to accommodate crossbeam with crossbeam, avoids the mutual interference of battery pack 1 and crossbeam, so that battery pack 1 can be made greater size, to meet more demand, alleviate the technical problem that battery pack 1 exists battery pack 1 and the crossbeam of vehicle interference.

[0095] The utility model discloses the avoiding groove 3 design of the top cover 2 of battery pack 1, so that the size of battery pack 1 can be made greater, so that more battery cell 501 can be arranged in battery pack 1, to realize greater electric quantity, greater voltage and faster charging efficiency.

[0096] The embodiments of the utility model are introduced in detail above, and the principle and implementation mode of the utility model are described by applying specific examples in this paper; the above embodiment is only used to help understanding the method and core idea of the utility model; meanwhile, for the skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A battery pack (1) for mounting in a vehicle, the vehicle including at least one crossbeam, characterized in that, include: The top cover (2) has at least one clearance groove (3) adapted to accommodate the crossbeam; and The cooling assembly (4) includes at least two cooling sub-sections (41), wherein each cooling sub-section (41) is offset from the corresponding clearance groove (3).

2. The battery pack (1) according to claim 1, characterized in that, The depth of the avoidance trench (3) ranges from 195 mm to 250 mm.

3. The battery pack (1) according to claim 2, characterized in that, Along the length of the battery pack (1), the width of the clearance groove (3) ranges from 98 mm to 120 mm.

4. The battery pack (1) according to claim 1, characterized in that, The cooling assembly (4) further includes at least one connecting pipe (42), each of the connecting pipes (42) being connected between the pipes of two adjacent cooling sub-parts (41), the extension direction of the connecting pipe (42) intersecting the extension direction of the corresponding clearance groove (3); wherein, the cross-sectional area of ​​each connecting pipe (42) is smaller than the cross-sectional area of ​​the pipe of the corresponding cooling sub-part (41).

5. The battery pack (1) according to claim 1, characterized in that, The battery pack includes at least two battery cell groups (5), and the battery cell group (5) near the top cover (2) includes at least two battery cell sub-sections (51), with a gap (52) formed between adjacent battery cell sub-sections (51), wherein the gap (52) is aligned with the corresponding clearance groove (3).

6. The battery pack (1) according to claim 5, characterized in that, The adjacent two battery cell groups (5) are connected in parallel to each other, and each battery cell group (5) includes n battery cells (501) connected in series, wherein 225≤n≤528.

7. The battery pack (1) according to claim 6, characterized in that, Each of the said cells (501) has a rated capacity ranging from 185 Ah to 206 Ah, so that the rated capacity of the battery pack (1) ranges from 300 kWh to 350 kWh.

8. The battery pack (1) according to claim 5, characterized in that, It also includes a housing, and the battery cell group (5) includes a plurality of battery cells (501), wherein a buffer (8) is provided between two adjacent battery cells (501) and between the battery cell group (5) and the housing, and the thickness of the buffer (8) ranges from 0.8 mm to 2 mm.

9. A battery system (9), characterized in that, It includes at least two battery packs as described in any one of claims 1 to 8 (1).

10. The battery system (9) according to claim 9, characterized in that, The spacing between two adjacent battery packs (1) ranges from 30 mm to 100 mm.

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