Battery monomer, battery module, battery pack and battery box

Abstract

The utility model discloses a battery monomer, battery module, battery pack and battery box, battery monomer is used for battery pack and includes shell body, two cover plate and pole group, shell body's length direction both ends open, shell body's width is L1 and satisfies: 270mm < = L1 < = 273mm; the two cover plates cover the opening of the shell body, and the shell body and the cover plates jointly define a mounting space; the pole group is arranged in the installation space. According to the single battery disclosed by the utility model, the number of the single batteries which can be arranged along the width direction of the single battery in the same distance is small, so that the number of gaps of the single batteries along the width direction can be reduced, the actual arrangement density of the single batteries is increased, and the energy density of a battery pack formed by the single batteries is increased; meanwhile, the large width size of the battery monomer can be avoided, and the heat dissipation difficulty in the width direction of the battery monomer is avoided.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to the battery technical field especially, it relates to a battery monomer, battery module, battery package and battery box. BACKGROUND

[0002] In prior art, the density of battery monomer in battery box is small, the number of gap of battery monomer along width direction is more, lead to the energy density of battery package is low. UTILITY MODEL CONTENTS

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this reason, the utility model provides a battery monomer, the battery monomer can increase the actual arrangement density of battery monomer, increase the energy density of battery package that battery monomer is composed.

[0004] The utility model also provides a battery module, the battery module includes above-mentioned battery monomer.

[0005] The utility model also provides a battery package, the battery package includes above-mentioned battery module.

[0006] The utility model also provides a battery box, the battery box includes above-mentioned battery package.

[0007] According to the battery monomer of utility model embodiment, for battery package and including shell body, two cover plates and pole group, the length direction both ends of shell body are open, the width of shell body is L1 and satisfies: 270mm≤L1≤273mm, two cover plates are covered and are arranged at the open mouth of shell body, and shell body and cover plate jointly define installation space, and pole group is arranged in installation space.

[0008] According to the battery monomer of utility model embodiment, by limiting the width of shell body is L1 and satisfies: 270mm≤L1≤273mm, make the number of battery monomer that can be arranged along the width direction of battery monomer in equal distance is less, can reduce the number of gap of battery monomer along width direction, increase the actual arrangement density of battery monomer, increase the energy density of battery package that battery monomer is composed, can avoid the width size of battery monomer is big simultaneously, avoid causing the heat dissipation difficulty of battery monomer along width direction.

[0009] In some embodiments of the utility model, the length of the shell body is L2 and satisfies: 520mm≤L2≤550mm.

[0010] In some embodiments of the utility model, the thickness of the shell body is L3 and satisfies: 35mm≤L3≤38mm.

[0011] The battery module according to the embodiment of the utility model, including above -mentioned battery monomer, a plurality of battery monomer along the thickness direction of battery monomer sequentially arrange.

[0012] The battery module according to the embodiment of the utility model, by limiting the width of shell body is L1 and satisfy: 270mm≤L1≤273mm, make the number of battery monomer that can be arranged in the width direction of battery monomer in the same distance is less, can reduce the number of gap of battery monomer along the width direction, increase the actual arrangement density of battery monomer, increase the energy density of battery pack that battery monomer is composed;It can also avoid the width size of battery monomer is larger, avoid causing the heat dissipation difficulty of the width direction of battery monomer.

[0013] In some embodiments of the utility model, two pole columns are provided on the cover plate, both of the two pole columns are electrically connected with the pole group, and the pole columns of the plurality of battery monomers are arranged on the same side of the height direction of the battery module.

[0014] The battery pack according to the embodiment of the utility model comprises a plurality of the battery modules, and the plurality of battery modules are sequentially arranged along the width direction of the battery monomers.

[0015] The battery pack according to the embodiment of the utility model, by limiting the width of shell body is L1 and satisfy: 270mm≤L1≤273mm, make the number of battery monomer that can be arranged in the width direction of battery monomer in the same distance is less, can reduce the number of gap of battery monomer along the width direction, increase the actual arrangement density of battery monomer, increase the energy density of battery pack that battery monomer is composed;It can also avoid the width size of battery monomer is larger, avoid causing the heat dissipation difficulty of the width direction of battery monomer.

[0016] In some embodiments of the utility model, first cold plates are arranged at both ends of the battery module along the width direction of the battery monomers.

[0017] In some embodiments of the utility model, the battery module comprises a plurality of battery groups, the battery group comprises a plurality of battery monomers, and corresponding battery groups in adjacent battery modules are electrically connected through busbars.

[0018] In some embodiments of the utility model, along the length direction of the battery pack, a heat insulation pad is arranged between adjacent battery groups in the same battery module.

[0019] The battery box according to the embodiment of the utility model comprises the battery pack, a plurality of battery packs are arranged in multiple rows and multiple columns, and the battery pack arranged at one end of the height direction of the battery box is integrated with a high-voltage box.

[0020] According to the battery box of the embodiment of the utility model, through limiting the width of the shell body is L1 and satisfying: 270mm <= L1 <= 273mm, make along the width direction of battery monomer in equal distance can arrange the quantity of battery monomer is less, can reduce the number of gap of battery monomer along the width direction, increase the actual arrangement density of battery monomer, increase the energy density of battery pack that battery monomer constitutes, can avoid the width size of battery monomer is bigger simultaneously, avoid causing the heat dissipation difficult of battery monomer width direction.

[0021] Additional aspects and advantages of the utility model will be in part given in the following description, part will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0023] Figure 1 It is the perspective view of battery monomer according to the embodiment of the utility model;

[0024] Figure 2 It is the front view of battery monomer according to the embodiment of the utility model;

[0025] Figure 3 It is the top view of battery monomer according to the embodiment of the utility model;

[0026] Figure 4 It is the bottom view of battery monomer according to the embodiment of the utility model;

[0027] Figure 5 It is the perspective view of battery pack according to the embodiment of the utility model;

[0028] Figure 6 It is the front view of battery pack according to the embodiment of the utility model;

[0029] Figure 7 It is the top view of battery pack according to the embodiment of the utility model;

[0030] Figure 8 It is the front view of battery box according to the embodiment of the utility model.

[0031] REFERENCE NUMERALS:

[0032] 1000, battery box;

[0033] 100, battery pack;

[0034] 10, battery module; 101, battery group;

[0035] 1. battery cell; 11. housing; 12. cover plate; 121. pole; 122. explosion-proof valve;

[0036] 20. first cold plate; 30. busbar; 40. heat insulation pad; 50. second cold plate; 60. high-voltage box. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explanation of the present application, and cannot be understood as a limitation of the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0039] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The following will be described with reference to Figures 1-4 The battery cell 1 according to the present application is described.

[0041] The battery cell 1 according to the present application comprises a housing body, two cover plates 12 and a pole group.

[0042] Specifically, as Figure 7As shown, the battery monomer 1 is used in the battery pack 100, the battery pack 100 is filled in the standard 20-foot energy storage container system, the voltage platform is basically 1500V, and the length, depth and height dimensions are: 6058mm*2438mm*2896mm. In order to reduce the floor area, the container system usually adopts single-side door opening. And most of the 20-foot energy storage container system adopts the layout scheme of 4 columns and 4 layers of battery packs 100.

[0043] As shown in Figure 1 and Figure 2 , the length direction of the shell body (such as the second direction shown in Figure 2 ) is open at both ends, and two cover plates 12 are covered on the open ends of the shell body. The shell body and the cover plate 12 jointly define a mounting space, which can provide a mounting position for other components of the battery monomer 1. In addition, the explosion-proof valve 122 of the battery monomer 1 can be arranged on one of the cover plates 12. When the battery monomer 1 inside appears thermal runaway, the relatively hot airflow inside the battery monomer 1 can break through the explosion-proof valve 122 and release outward, avoiding the risk of explosion of the battery monomer 1 after heating, and avoiding damage to other components around when the shell body is broken.

[0044] The pole group is arranged in the mounting space, and the shell body and the cover plate 12 can protect the pole group, avoiding direct impact of the pole group when the battery monomer 1 is impacted from the outside, and avoiding causing damage to the pole group. At the same time, the shell body can avoid the entry of external pollutants into the pole group, avoid affecting the electrical safety of the pole group, and increase the reliability of the battery monomer 1.

[0045] As shown in Figure 1 and Figure 2 , the width of the shell body is L1 and satisfies: 270mm≤L1≤273mm. It can be understood that the width of the shell body can be 270mm, 270.2mm, 270.4mm, 270.6mm, 270.8mm, 271mm, 271.2mm, 271.4mm, 271.6mm, 271.8mm, 272mm, 272.2mm, 272.4mm, 272.6mm, 272.8mm or 273mm. The width of the shell body is not less than 270mm, so that the width of the battery monomer 1 is larger, and the number of battery monomers 1 that can be arranged in the same distance along the width direction (such as the first direction shown in Figure 2 ) of the battery monomer 1 is smaller, which can reduce the number of gaps of the battery monomer 1 along the width direction, increase the actual arrangement density of the battery monomer 1, and increase the energy density of the battery pack 100 composed of the battery monomer 1; the width of the shell body is not greater than 273mm, which can avoid the width size of the battery monomer 1 being too large, and avoid causing difficulty in heat dissipation in the width direction of the battery monomer 1.

[0046] According to the battery monomer 1 of the embodiment of the utility model, through limit the width of shell body is L1 and satisfy: 270mm <= L1 <= 273mm, make the quantity of battery monomer 1 that can be arranged in the width direction of battery monomer 1 in the same distance is less, can reduce the number of gap of battery monomer 1 along the width direction, increase the actual arrangement density of battery monomer 1, increase the energy density of battery pack 100 that battery monomer 1 is composed of, can avoid the width size of battery monomer 1 is big simultaneously, avoid causing the heat dissipation difficulty of the width direction of battery monomer 1.

[0047] In the embodiment, the width of the battery monomer 1 is 273mm, so that the number of battery monomers 1 that can be arranged in the width direction of the battery monomer 1 within the same distance is less, the number of gaps of the battery monomer 1 along the width direction can be reduced, the actual arrangement density of the battery monomer 1 is increased, and the energy density of the battery pack 100 composed of the battery monomer 1 is increased; meanwhile, the width size of the battery monomer 1 can be avoided to be large, and the heat dissipation difficulty of the width direction of the battery monomer 1 can be avoided.

[0048] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 , the length of the shell body is L2 and satisfies: 520mm <= L2 <= 550mm. It can be understood that the length of the shell body can be 520mm, 521mm, 522mm, 523mm, 524mm, 525mm, 526mm, 527mm, 528mm, 529mm, 530mm, 531mm, 532mm, 533mm, 534mm, 535mm, 536mm, 537mm, 538mm, 539mm, 540mm, 541mm, 542mm, 543mm, 544mm, 545mm, 546mm, 547mm, 548mm, 549mm or 550mm. The length of the shell body is not less than 520mm, which can increase the maximum power of a single battery monomer 1, increase the maximum power of the battery pack 100 composed of the battery monomer 1, and reduce the manufacturing cost of the battery pack 100; the length of the shell body is not greater than 550mm, which can avoid the length size of the battery monomer 1 being large, and avoid causing the heat dissipation difficulty of the length direction of the battery monomer 1.

[0049] In the embodiment, the length of the shell body is 520mm, which can increase the maximum power of a single battery monomer 1, increase the maximum power of the battery pack 100 composed of the battery monomer 1, and reduce the manufacturing cost of the battery pack 100; meanwhile, the length size of the battery monomer 1 can be avoided to be large, and the heat dissipation difficulty of the length direction of the battery monomer 1 can be avoided.

[0050] In some embodiments of the utility model, as shown in Figure 1 and Figure 3As shown, the thickness of the shell body is L3 and satisfies: 35mm≤L3≤38mm. It can be understood that the thickness of the shell body can be 35mm, 35.2mm, 35.4mm, 35.6mm, 35.8mm, 36mm, 36.2mm, 36.4mm, 36.6mm, 36.8mm, 37mm, 37.2mm, 37.4mm, 37.6mm, 37.8mm or 38mm. The thickness of the shell body is not less than 35mm, which can ensure the arrangement space of the thickness direction (such as the third direction shown in the figure) of the pole group, ensure the power of the battery monomer 1; the thickness of the shell body is not more than 38mm, which can avoid the size of the pole group in the battery monomer 1 being too large, can avoid the heat generated by the pole group when the battery monomer 1 works being too high, and avoid causing the heat dissipation difficulty of the battery monomer 1. Figure 3 As shown, the thickness of the shell body is L3 and satisfies: 35mm≤L3≤38mm. It can be understood that the thickness of the shell body can be 35mm, 35.2mm, 35.4mm, 35.6mm, 35.8mm, 36mm, 36.2mm, 36.4mm, 36.6mm, 36.8mm, 37mm, 37.2mm, 37.4mm, 37.6mm, 37.8mm or 38mm. The thickness of the shell body is not less than 35mm, which can ensure the arrangement space of the thickness direction (such as the third direction shown in the figure) of the pole group, ensure the power of the battery monomer 1; the thickness of the shell body is not more than 38mm, which can avoid the size of the pole group in the battery monomer 1 being too large, can avoid the heat generated by the pole group when the battery monomer 1 works being too high, and avoid causing the heat dissipation difficulty of the battery monomer 1.

[0051] In the embodiment, the thickness of the shell body is 37mm, which can ensure the power of the battery monomer 1, and can avoid the heat generated by the pole group when the battery monomer 1 works being too high, and avoid causing the heat dissipation difficulty of the battery monomer 1.

[0052] At this time, the capacity of the single battery monomer 1 can be ≥705Ah, which is higher than the capacity of the traditional battery cell.

[0053] According to the battery module 10 of the embodiment of the utility model, as shown in Figure 5 and Figure 7 The battery monomer 1 is arranged along the thickness direction of the battery monomer 1.

[0054] According to the battery module 10 of the embodiment of the utility model, by limiting the width of the shell body to L1 and satisfying: 270mm≤L1≤273mm, the number of battery monomers 1 that can be arranged along the width direction of the battery monomer 1 in the same distance is less, which can reduce the number of gaps of the battery monomer 1 along the width direction, increase the actual arrangement density of the battery monomer 1, and increase the energy density of the battery pack 100 composed of the battery monomer 1; at the same time, the width size of the battery monomer 1 can be avoided being too large, and the heat dissipation difficulty of the battery monomer 1 in the width direction can be avoided.

[0055] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 The cover plate 12 is provided with two pole columns 121, and the two pole columns 121 are electrically connected with the pole group. The pole columns 121 of the plurality of battery monomers 1 are arranged in the height direction of the battery module 10. Figure 6The fourth direction) is on the same side. It can be understood that the electrical connection between the battery monomers 1 is realized through the electrical connection of the pole posts 121, the pole posts 121 of the battery monomers 1 are arranged on the same side in the height direction of the battery module 10, so that the connecting pieces between the battery monomers 1 can be arranged on the same side in the height direction of the battery module 10, thereby increasing the reliability of the electrical connection of the battery module 10.

[0056] According to the battery pack 100 of the embodiment of the utility model, as shown in Figure 5 and Figure 6 The battery module 10 is arranged in sequence along the width direction of the battery monomer 1.

[0057] According to the battery pack 100 of the embodiment of the utility model, by limiting the width of the shell body to L1 and satisfying 270mm≤L1≤273mm, the number of battery monomers 1 that can be arranged in the same distance along the width direction of the battery monomer 1 is small, the number of gaps of the battery monomers 1 along the width direction can be reduced, the actual arrangement density of the battery monomers 1 is increased, and the energy density of the battery pack 100 composed of the battery monomers 1 is increased; meanwhile, the width size of the battery monomer 1 can be avoided to be large, and the heat dissipation difficulty of the battery monomer 1 in the width direction can be avoided.

[0058] In some embodiments of the utility model, as shown in Figure 5 and Figure 6 Along the width direction of the battery monomer 1, the two ends of the battery module 10 are provided with the first cold plate 20. It can be understood that the two ends of the battery monomer 1 in the width direction are provided with the first cold plate 20, the first cold plate 20 can better cool the battery monomer 1, and the thermal safety of the battery monomer 1 is realized.

[0059] In some embodiments of the utility model, as shown in Figure 7 The battery module 10 comprises a plurality of battery groups 101, the battery group 101 comprises a plurality of battery monomers 1, and the corresponding battery groups 101 in the two adjacent battery modules 10 are electrically connected through the busbar 30. It can be understood that the plurality of battery monomers 1 in the same battery group 101 are designed in parallel, and the number of busbars 30 in the battery pack 100 can be reduced; in addition, the busbar 30 is provided with a set of sampling wire harnesses, the state of the battery pack 100 is monitored in real time, and relevant information is transmitted to the battery management controller, the sampling wire harnesses provide a strong guarantee for the safe, stable and efficient operation of the battery pack 100 and the battery monomer 1. At this time, the number of sampling wire harnesses in the battery pack 100 can be reduced, and the manufacturing cost of the battery pack 100 can be reduced.

[0060] In some embodiments of the utility model, as shown in Figure 7 Along the length direction of the battery pack 100 (as shown in Figure 7(As shown in the fifth direction), a heat insulation pad 40 is provided between two adjacent battery packs 101 in the same battery module 10. The heat insulation pad 40 can reduce heat transfer between battery packs 101. In the event of thermal runaway of battery pack 101, it can effectively prevent heat from spreading to surrounding battery packs 101, protect the surrounding battery packs 101 to work normally, and increase the thermal safety of battery pack 100.

[0061] In this embodiment, the heat insulation pad 40 is an aerogel, which is composed of an ultra-thin aerogel felt and a PET / PI film. It has an extremely low thermal conductivity at room temperature (<0.035W / m·K) and is also flame-retardant and does not shed powder. The aerogel also has good compression performance and buffering effect, which prevents the battery pack 101 from being damaged by collision when it is displaced.

[0062] In some embodiments of this utility model, such as Figure 6 As shown, a second cold plate 50 is provided at one end of the battery module 10 along the height direction where the busbar 30 is located. Since the battery cells 1 in the battery pack 101 are connected in parallel, the current carrying capacity of the busbar 30 will increase. The busbar 30 can be cooled by providing a second cold plate 50 at one end of the battery module 10 along the height direction to ensure that the battery cells 1 and the busbar 30 do not overheat, thus ensuring the thermal safety of the battery pack 100.

[0063] According to the embodiment of the present utility model, the battery box 1000, such as Figure 8 As shown, the battery pack 100 is arranged in multiple rows and columns, positioned along the height of the battery box 1000 (e.g., ...). Figure 8 The battery pack 100 at one end (shown in the sixth direction) integrates a high-voltage box 60, which can save space occupied by the high-voltage box 60 in the height direction of the battery box 1000 and increase the space utilization rate of the battery box 1000.

[0064] According to the battery box 1000 of this utility model embodiment, by limiting the width of the shell body to L1 and satisfying: 270mm≤L1≤273mm, the number of battery cells 1 that can be arranged along the width direction of the battery cells 1 within the same distance is reduced. This can reduce the number of gaps between battery cells 1 along the width direction, increase the actual arrangement density of battery cells 1, and increase the energy density of the battery pack 100 composed of battery cells 1. At the same time, it can avoid the battery cells 1 having a large width dimension, thus avoiding heat dissipation difficulties in the width direction of the battery cells 1.

[0065] The number of battery clusters of the 1500V battery box 1000 needs to be ≤416S, when the battery pack 101 adopts two battery monomers 1 in parallel, and the battery pack 100 adopts a 4-column 4-layer layout in the container, the number of battery clusters will be halved while ensuring that the number of battery cluster strings is not greater than 416S. At this time, the minimum power of the system is: 416*3.2*705*2*4=7.5MWh, and the existing 625-cell-based large PACK container system power is 6.5MWh, and the system power is increased by more than 15%.

[0066] Other configurations and operations of the battery monomer 1, the battery module 10 and the battery pack 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0067] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell, characterized in that, For use in battery packs and including: The shell body has open ends along its length, and the width of the shell body is L1 and satisfies: 270mm≤L1≤273mm; Two cover plates are provided on the opening of the shell body, and the shell body and the cover plates together define the installation space; A pole group is disposed within the installation space.

2. The battery cell according to claim 1, characterized in that, The length of the shell body is L2 and satisfies: 520mm≤L2≤550mm.

3. The battery cell according to claim 1, characterized in that, The thickness of the shell body is L3 and satisfies: 35mm≤L3≤38mm.

4. A battery module, characterized in that, include: According to any one of claims 1-3, a plurality of battery cells are arranged sequentially along the thickness direction of the battery cell.

5. The battery module according to claim 4, characterized in that, The cover plate is provided with two terminals, both of which are electrically connected to the electrode group. The terminals of the multiple battery cells are located on the same side of the height direction of the battery module.

6. A battery pack, characterized in that, include: According to claim 4 or 5, the battery modules are arranged sequentially along the width direction of the battery cells.

7. The battery pack according to claim 6, characterized in that, Along the width direction of the battery cell, both ends of the battery module are provided with a first cold plate.

8. The battery pack according to claim 6, characterized in that, The battery module includes multiple battery packs, and each battery pack includes multiple individual battery cells. The corresponding battery packs in two adjacent battery modules are electrically connected through a busbar.

9. The battery pack according to claim 8, characterized in that, Along the length of the battery pack, a heat insulation pad is provided between two adjacent battery packs in the same battery module.

10. A battery box, characterized in that, The battery pack includes any one of claims 6-9, wherein a plurality of the battery packs are arranged in multiple rows and columns, and a high-voltage box is integrated in one end of the battery pack located in the height direction of the battery box.

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