Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries. The battery pack comprises a plurality of single batteries, a heat insulation part and a buffer part, the plurality of single batteries are arranged at intervals along a first direction, a first gap or a second gap is formed between two adjacent single batteries in the first direction, and the first gap and the second gap are arranged along the first direction; the heat insulation part is arranged in the first gap and is propped between two adjacent single batteries; and the buffer parts are arranged in the second gaps and abut between the two adjacent single batteries, the buffer parts surround the outer edges of the single batteries, a first cavity is defined by the buffer parts, and the first cavity is through in the first direction. By arranging the heat insulation pieces in the first gaps and arranging the buffer pieces in the second gaps, the number of the heat insulation pieces is reduced, and redundancy is reduced; meanwhile, the first cavity provides a battery expansion space, the space utilization rate is increased, and the energy efficiency of the power battery is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] The automotive power battery field is a hot area of ​​development in the current automotive industry, and related technologies are constantly being innovated and developed. Battery pack technology is an important direction in this field. The primary goal of battery pack assembly is to improve the overall space utilization rate, increase the energy efficiency of the power battery, and at the same time meet the safety and performance requirements of the battery pack.

[0003] However, the insulation material between adjacent individual cells in the battery pack creates design redundancy, which leads to a decrease in the space utilization rate of the battery pack and the energy efficiency of the power battery. Utility Model Content

[0004] The purpose of this utility model is to provide a battery pack and electrical equipment, which aims to overcome the technical problems of redundant heat insulation material design and low space utilization in current battery packs; another purpose of this application is to provide an electrical equipment.

[0005] Technical solution: A battery pack disclosed in this application includes:

[0006] Multiple individual cells are arranged at intervals along a first direction, and a first gap or a second gap is formed between two adjacent individual cells in the first direction. The first gap and the second gap are arranged along the first direction.

[0007] A heat insulation element is disposed within the first gap and abuts against the two adjacent individual cells;

[0008] A buffer element is disposed within the second gap and abuts against two adjacent individual cells. The buffer element surrounds the outer edge of the individual cell and forms a first chamber, which extends through the first direction.

[0009] In some embodiments, the thermal insulation member includes a thermal insulation body and a support portion, wherein the support portion is connected to one side of the thermal insulation body in the first direction;

[0010] The support portion has a first groove, the opening of which is oriented toward the individual battery cell to provide space for the individual battery cell to expand and deform.

[0011] In some embodiments, the support portion includes a first support segment and a second support segment, the first support segment and the second support segment being arranged at intervals along a second direction, the second direction being perpendicular to the first direction;

[0012] The first support segment and the second support segment form the first groove.

[0013] In some embodiments, the width dimension of the first support segment and the second support segment along the second direction is a, which satisfies 3mm≤a≤30mm.

[0014] In some embodiments, the number of the first gaps is less than or equal to the number of the second gaps.

[0015] In some embodiments, the heat insulation member has a thickness dimension b along the first direction, and the buffer member has a thickness dimension c along the first direction, satisfying:

[0016] 0.5mm≤b≤10mm;

[0017] 0.2mm≤c≤10mm.

[0018] In some embodiments, the first gap and the second gap are arranged alternately along the first direction.

[0019] In some embodiments, both the buffer and the support are cushioning foam.

[0020] In some embodiments, a first end plate and a second end plate are further included, the first end plate and the second end plate being respectively disposed on both sides of the plurality of individual cells along the first direction, and a heat insulation member or a buffer member is further sandwiched between the first end plate and the adjacent individual cell, and between the second end plate and the adjacent individual cell.

[0021] This application also discloses an electrical device, including a battery pack as described in the above embodiments.

[0022] Beneficial Effects: The battery pack in this embodiment includes multiple individual cells, a heat insulation component, and a buffer component. The multiple individual cells are arranged at intervals along a first direction, and a first gap or a second gap is formed between two adjacent individual cells in the first direction. The first gap and the second gap are arranged along the first direction. The heat insulation component is disposed within the first gap and abuts against two adjacent individual cells. The buffer component is disposed within the second gap and abuts against two adjacent individual cells. The buffer component surrounds the outer edge of the individual cell and forms a first chamber, which is through-hole in the first direction. By using the first gap or the second gap formed between two adjacent individual cells, and arranging the heat insulation component within the first gap and the buffer component within the second gap, the number of heat insulation components is reduced, and design redundancy is reduced. At the same time, the first chamber formed by the buffer component can provide expansion space for the individual cells, improving space utilization, reducing material costs, and improving the energy efficiency of the power battery.

[0023] The electrical device in this application includes the battery pack described in the above embodiments. Therefore, it can possess all the technical features and effects of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an exploded view of the battery pack according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the front view structure of the battery pack according to an embodiment of this application;

[0027] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0028] Figure 4 This is a three-dimensional structural diagram of the buffer component in the battery pack according to an embodiment of this application;

[0029] Figure 5 This is a three-dimensional structural diagram of the heat insulation component in the battery pack according to an embodiment of this application;

[0030] Reference numerals: 1. Single cell; X, First direction; 101. First gap; 102. Second gap; 2. Heat insulation component; 3. Buffer component; 30. First chamber; 21. Heat insulation body; 22. Support part; 220. First groove; 221. First support section; 222. Second support section; Y, Second direction; 4. First end plate; 5. Second end plate. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, "multiple" means two or more, and "at least one" can refer to one, two, or more, unless otherwise explicitly specified. The terms "first," "second," and "third," etc., are only for the convenience of description and are used to name parts or embodiments by number, and do not imply any order of importance between the parts or embodiments.

[0033] It should also be noted that in the accompanying drawings of this application, the arrow marked X indicates the first direction, and the arrow marked Y indicates the second direction. The introduction of the first and second directions in this application's description is to more clearly define the structure and relative positional relationships of the components in a battery pack and electrical device. In actual implementation, the first direction is generally the length direction of the battery pack, and the second direction is generally the width or height direction of the battery pack. Optionally, the first and second directions are perpendicular to each other to optimize the layout of the battery pack and electrical device. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular; for example, an angle between 80° and 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel; for example, a completely parallel angle within 10° is considered parallel.

[0034] As a preamble to the embodiments of this application, in order to extend the service life of the battery pack and solve the problem of battery thermal runaway, thermal insulation material is usually sandwiched between adjacent individual cells in the battery pack. However, the thermal insulation material occupies the space inside the battery pack, resulting in a smaller reserved space for battery thermal expansion, reducing the space utilization rate of the battery pack. At the same time, the amount of thermal insulation material has design redundancy, increasing costs and reducing the energy efficiency of the power battery.

[0035] In view of this, embodiments of this application provide a battery pack aimed at solving at least one of the above-mentioned technical problems.

[0036] Please see Figures 1 to 5As shown in the figure, the battery pack in the embodiment of the present application includes: a plurality of single cells 1, a heat insulation member 2 and a buffer member 3; wherein, the plurality of single cells 1 are arranged at intervals along the first direction X, and a first gap 101 or a second gap 102 is formed between two adjacent single cells 1 in the first direction X, and the first gap 101 and the second gap 102 are arranged along the first direction X; the heat insulation member 2 is disposed in the first gap 101 and abuts between two adjacent single cells 1; the buffer member 3 is disposed in the second gap 102 and abuts between two adjacent single cells 1, and the buffer member 3 surrounds the outer edge of the single cell 1 and encloses a first chamber 30, and the first chamber 30 penetrates along the first direction X.

[0037] It should be understood that the plurality of single cells 1 are arranged in sequence in the first direction X to form a battery module for storing and releasing energy, which is the core component of the battery pack. The number of single cells 1 can be selected according to the space condition of the battery pack, and the length is flexible and variable, which can meet the use of battery packs of different sizes. A first gap 101 or a second gap 102 is formed between two adjacent single cells 1. Among them, the heat insulation member 2 is disposed in the first gap 101 to separate two adjacent single cells 1 and play a role in heat insulation, so as to avoid the mutual contact between adjacent single cells 1 and prevent the battery from thermal runaway caused by heat accumulation, and further extend the service life of the battery pack. The buffer member 3 is disposed in the second gap 102. On the one hand, the buffer member 3 can separate two adjacent single cells 1 to avoid the mutual extrusion of two adjacent single cells 1. The buffer member 3 forms a first chamber 30 for providing expansion space, which can ensure that sufficient expansion space is reserved between adjacent single cells 1, prevent the single cells 1 from being damaged due to mutual extrusion after expansion, and ensure the safety of the battery pack.

[0038] Refer Figure 1 As shown in the figure, further, both the first gap 101 and the second gap 102 are located on the large surface of the single cell 1, that is, the surface with the largest area in the single cell 1. Considering that the large surface of the single cell 1 has better heat dissipation capacity and a larger amplitude of thermal expansion deformation, by arranging the heat insulation member 2 or the buffer member 3 on the large surface of the single cell 1, the heat insulation requirement of the battery pack is met, and at the same time, the space required for the thermal expansion of the single cell 1 is increased. Moreover, both the heat insulation member 2 and the buffer member 3 can provide a stable supporting force for the single cell 1 to ensure the stability of the battery pack.

[0039] Refer Figure 5As shown, in some embodiments, the heat insulation member 2 includes a heat insulation body 21 and a support portion 22. The support portion 22 is connected to one side of the heat insulation body 21 in the first direction X. The support portion 22 has a first groove 220, and the notch of the first groove 220 faces the single cell 1, for providing an expansion deformation space for the single cell 1. It should be understood that the heat insulation body 21 is made of heat insulation materials, such as one or more of aerogel, ceramic fiber, mica sheet, foam plastic and glass fiber. The support portion 22 has a certain compressibility, for providing extrusion buffering between two adjacent single cells 1, preventing the single cells 1 from hard contact and causing damage. At the same time, the support portion 22 has a first groove 220, which can provide an expansion space for the single cell 1, improving the safety performance of the single cell 1.

[0040] As shown Figure 5 As shown, in some embodiments, the support portion 22 includes a first support segment 221 and a second support segment 222. The first support segment 221 and the second support segment 222 are arranged at intervals along the second direction Y, and the second direction Y is perpendicular to the first direction X. The first support segment 221 and the second support segment 222 enclose the first groove 220. It should be understood that both the first support segment 221 and the second support segment 222 are strip-shaped structures, and both the first support segment 221 and the second support segment 222 are located on the plane perpendicular to the first direction X and are arranged along the second direction Y, to maintain the balance between two single cells 1, preventing the single cells 1 from hard contact and causing damage. At the same time, the first support segment 221 and the second support segment 222 also have compressibility, for providing extrusion buffering between two adjacent single cells 1. The first groove 220 enclosed by the first support segment 221 and the second support segment 222 can provide an expansion space for the single cell 1, to improve the safety performance of the single cell 1.

[0041] Please refer to Figure 5 As shown, in some embodiments, the width dimension of the first support segment 221 and the second support segment 222 along the second direction Y is a, satisfying 3mm ≤ a ≤ 30mm. Specifically, a can be any value among 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm or a range value composed of any two values. It should be understood that the larger the width dimension a of the first support segment 221 and the second support segment 222, the better the stability between two adjacent single cells 1, and the smaller the space of the first groove 220, and the expansion space provided by the first groove 220 decreases. On the contrary, the smaller a is, the lower the stability between two adjacent single cells 1, the larger the space of the first groove 220, and the expansion space provided by the first groove 220 increases.

[0042] In some embodiments, the number of the first gaps 101 is less than or equal to the number of the second gaps 102. It should be understood that by limiting the number of the heat insulation members 2 to be less than the number of the buffer members 3, while ensuring the heat insulation effect, more buffer members 3 are provided, so as to better protect the battery, reserve more space for the expansion of the single battery 1, make the safety and stability of the battery pack higher, and at the same time make the structure of the battery pack more compact and efficient.

[0043] Please refer to Figure 4 and Figure 5 As shown, in some embodiments, the heat insulation member 2 has a thickness dimension b along the first direction X, and the buffer member 3 has a thickness dimension c along the first direction X, satisfying: 0.5 mm ≤ b ≤ 10 mm; 0.2 mm ≤ c ≤ 10 mm. It should be understood that by reducing the number of the heat insulation members 2 and appropriately increasing the thickness of the heat insulation members 2, the heat insulation performance of the heat insulation members 2 can be enhanced, and at the same time, combined with the heat insulation protection at the battery pack system level, a precise protection design can be realized, reducing design redundancy and cost. Specifically, the thickness dimension b of the heat insulation member 2 can be any value among 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, 7.5 mm, 8.0 mm, 8.5 mm, 9.0 mm, 9.5 mm, 10.0 mm or the range value between any two numerical values. The thickness dimension c of the buffer member 3 can be any value among 0.2 mm, 0.7 mm, 1.2 mm, 1.7 mm, 2.2 mm, 2.7 mm, 3.2 mm, 3.7 mm, 4.2 mm, 4.7 mm, 5.2 mm, 5.7 mm, 6.2 mm, 6.7 mm, 7.2 mm, 7.7 mm, 8.2 mm, 8.7 mm, 9.2 mm, 9.7 mm, 10.0 mm or the range value between any two numerical values. It should be noted that the greater the thickness of the heat insulation member 2, the better its heat insulation performance and buffer performance, and the greater the thickness of the buffer member 3, the better its buffer support ability. At the same time, both the heat insulation member 2 and the buffer member 3 are beneficial to increasing the expansion space reserved for the single battery 1, and the safety of the battery pack is better. In some embodiments, the thicknesses of the heat insulation member 2 and the buffer member 3 are related to the thickness dimension of the single battery 1 along the first direction X, and the greater the thickness of the single battery 1, the greater the corresponding thicknesses of the heat insulation member 2 and the buffer member 3, so as to provide better buffering and support.

[0044] Refer to Figure 1As shown, in some embodiments, the first gap 101 and the second gap 102 are arranged alternately along the first direction X. It should be understood that by alternately arranging the first gap 101 and the second gap 102, where the heat insulation member 2 is arranged in the first gap 101 and the buffer member 3 is arranged in the second gap 102, the heat insulation member 2 provides thermal runaway protection for the single battery 1 in the battery pack. At the same time, the support portion 22 on the heat insulation member 2 and the buffer member 3 have compressibility and have an expansion space that meets the requirements of the single battery 1, which can improve the safety of the single battery 1; by alternately arranging the heat insulation member 2 and the buffer member 3, the use of heat insulation materials can be reduced, thereby reducing the production cost and overall weight of the battery pack, increasing the energy density of the battery pack, improving the lightweight of the battery pack, and thus increasing the market competitiveness of the battery pack.

[0045] In some embodiments, both the buffer member 3 and the support portion 22 are buffer foams. It should be understood that there are a large number of tiny pore structures inside the buffer foam, which can provide a buffer space, absorb external impact forces, reduce the vibration received by the battery pack, and improve the safety protection; at the same time, the buffer foam can provide stable support to avoid wear and collision of the single battery 1 caused by hard contact.

[0046] Refer Figure 1 to Figure 2 As shown, in some embodiments, it further includes a first end plate 4 and a second end plate 5. The first end plate 4 and the second end plate 5 are respectively arranged on both sides of a plurality of single batteries 1 along the first direction X. A heat insulation member 2 is also interposed between the first end plate 4 and an adjacent single battery 1, and between the second end plate 5 and an adjacent single battery 1. It should be understood that the first end plate 4 and the second end plate 5 mainly play the role of bearing structural support. By arranging the heat insulation member 2 between the end plate and the single battery 1, on the one hand, it can reduce the impact of the thermal runaway of the single battery 1 on the end plate, help maintain the physical and chemical properties of the end plate, and reduce the risk of deformation and aging of the end plate; on the other hand, it can prevent the thermal runaway of the single battery 1 from damaging the battery pack housing, delay the time of thermal runaway, control the heat of the battery pack within a certain range, and reduce the possibility of fire caused by high temperature, thereby improving the overall safety of the battery pack. Furthermore, the heat insulation member 2 and the end plate also play the role of protecting the safety of surrounding components, ensuring that the coordinated work of each component in the battery pack is not disturbed.

[0047] In some other embodiments, a buffer member 3 can also be arranged between the end plate and the single battery 1. On the one hand, it serves to space the end plate and the single battery 1. On the other hand, the buffer member 3 has good compressibility and buffering performance, providing a buffer and compression space between the single battery 1 and the end plate, and improving the safety protection.

[0048] This application also discloses an electrical device, including a battery pack as described in the above embodiments. Therefore, it can possess all the technical features and effects of the battery pack described above, and will not be repeated here.

[0049] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0050] The battery pack and electrical equipment provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, include: Multiple individual cells are arranged at intervals along a first direction, and a first gap or a second gap is formed between two adjacent individual cells in the first direction. The first gap and the second gap are arranged along the first direction. A heat insulation element is disposed within the first gap and abuts against the two adjacent individual cells; A buffer element is disposed within the second gap and abuts against two adjacent individual cells. The buffer element surrounds the outer edge of the individual cell and forms a first chamber, which extends through the first direction.

2. The battery pack according to claim 1, characterized in that, The heat insulation component includes a heat insulation body and a support portion, wherein the support portion is connected to one side of the heat insulation body in the first direction; The support portion has a first groove, the opening of which is oriented toward the individual battery cell to provide space for the individual battery cell to expand and deform.

3. The battery pack according to claim 2, characterized in that, The support portion includes a first support segment and a second support segment, the first support segment and the second support segment being arranged at intervals along a second direction, the second direction being perpendicular to the first direction; The first support segment and the second support segment form the first groove.

4. The battery pack according to claim 3, characterized in that, The width of the first support segment and the second support segment along the second direction is 'a', which satisfies 3mm≤a≤30mm.

5. The battery pack according to claim 2, characterized in that, The number of the first gaps is less than or equal to the number of the second gaps.

6. The battery pack according to claim 1, characterized in that, The heat insulation component has a thickness dimension b along the first direction, and the buffer component has a thickness dimension c along the first direction, satisfying: 0.5mm≤b≤10mm; 0.2mm≤c≤10mm.

7. The battery pack according to claim 1, characterized in that, The first gap and the second gap are arranged alternately along the first direction.

8. The battery pack according to claim 2, characterized in that, Both the buffer and the support are made of cushioning foam.

9. The battery pack according to claim 1, characterized in that, It also includes a first end plate and a second end plate, which are respectively disposed on both sides of the plurality of individual cells along the first direction. A heat insulation component or a buffer component is also sandwiched between the first end plate and the adjacent individual cell, and between the second end plate and the adjacent individual cell.

10. An electrical appliance, characterized in that, Includes a battery pack as described in any one of claims 1 to 9 above.

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