Blade battery cell and battery pack
By designing a recessed portion on the shell of the blade battery cell to accommodate the pole, the problem of the pole occupying space is solved and the capacity of the battery pack is increased.
Patent Information
- Application Number
- CN202422682908.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-04
AI Technical Summary
When the blade cell is installed in the battery pack box, the pole takes up extra space, resulting in reduced effective space utilization of the box and affecting the capacity of the battery pack.
设计刀片电芯的壳体在宽度方向上形成凹陷部，极柱设置在凹陷部内，使极柱不再凸出，提升箱体的有效体积利用率。
By arranging the pole in the recessed portion of the shell, additional box space is avoided and the capacity of the battery pack is increased.
Smart Images
Figure CN223436577U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a blade battery cell and a battery pack. Background Art
[0002] With the development of lithium-ion battery technology, blade cells have been widely used.
[0003] The blade cell includes a shell, two cover plates and two poles. The two cover plates are respectively arranged at the two ends of the shell in the length direction. The two poles are respectively provided on the two cover plates and protrude relative to the two cover plates. When the blade cell is installed into the battery pack box, the poles need to occupy additional internal space of the battery pack box, which reduces the effective space utilization of the box and affects the capacity of the battery pack. Utility Model Content
[0004] In view of this, the present application provides a battery cell and a battery pack to solve the problem that the pole needs to occupy additional internal space of the battery pack box, which reduces the effective space utilization of the box and affects the capacity of the battery pack.
[0005] According to one aspect of the present application, a blade cell is provided, comprising a housing, two poles, and two cover plates, wherein the housing comprises two openings opposite to each other in a lengthwise direction of the blade cell, and the two cover plates are respectively disposed on the two openings;
[0006] The housing includes reference planes facing each other in the width direction of the blade cell, and two recessed portions are formed on the housing. The two recessed portions are recessed from the two reference planes toward the interior of the housing, and the two poles are respectively disposed in the two recessed portions;
[0007] The two recessed portions are respectively recessed from the two reference planes along the width direction toward the interior of the housing, and a dimension of the recessed portions in the width direction is larger than a dimension of the pole in the width direction.
[0008] Preferably, the two recessed portions are respectively located in the middle of the two reference planes in the length direction.
[0009] Preferably, the two recessed portions are respectively located at the ends of the two reference planes in the length direction, and the two recessed portions are located on different sides in the length direction.
[0010] Preferably, the two recessed portions are respectively located at the ends of the two reference planes in the length direction, and the two recessed portions are located on the same side in the length direction.
[0011] Preferably, the size of the shell in the length direction is 300mm-1200mm, the size of the shell in the width direction is 80mm-300mm, and the size of the shell in the thickness direction of the blade battery core is 10mm-55mm.
[0012] Preferably, the size of the recessed portion in the thickness direction is larger than the size of the pole in the thickness direction, and the size of the recessed portion in the length direction is larger than the size of the pole in the length direction.
[0013] Preferably, the ratio of the size of the recessed portion in the length direction to the size of the shell in the length direction is 1 / 10-1 / 3.
[0014] According to another aspect of the present application, a battery pack is provided, comprising the above-mentioned blade battery cell.
[0015] Preferably, the battery pack includes a cover, a box and a plurality of square battery cells, the plurality of square battery cells are stacked on the box, and the cover is arranged on the box.
[0016] The blade cell of the present application includes a shell, two poles and two cover plates. The shell includes two openings opposite to each other in the length direction of the blade cell, and the two cover plates are respectively arranged on the two openings; the shell includes reference planes facing each other in the width direction of the blade cell, and two recessed portions are formed on the shell. The two recessed portions are recessed from the two reference planes toward the interior of the shell, and the two poles are respectively arranged in the two recessed portions. When the blade cell is installed in the box, since the poles are arranged in the recessed portions, the poles no longer protrude. In this way, the poles no longer occupy additional space in the box, the effective volume utilization rate of the box is improved, and the capacity of the battery pack is increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 A schematic structural diagram of a blade battery cell according to a first embodiment of the present invention is shown;
[0019] Figure 2 A schematic structural diagram of a blade battery cell according to a second embodiment of the present invention is shown;
[0020] Figure 3A schematic structural diagram of a blade battery cell according to a third embodiment of the present invention is shown.
[0021] Icon: 1-shell; 11-recessed portion; 2-pole; 3-cover; S1-reference plane; L1-length direction; L2-width direction; L3-thickness direction. DETAILED DESCRIPTION
[0022] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.
[0023] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.
[0024] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements present between them.
[0025] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.
[0026] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.
[0027] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be located "below" or "lower" relative to the other element. Thus, the term "above" encompasses both the orientations of "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein will be interpreted accordingly.
[0028] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.
[0029] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.
[0030] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.
[0031] According to one aspect of the present application, a blade battery cell is provided, such as Figures 1 to 3As shown, the blade cell includes a shell 1, two poles 2 and two cover plates 3. The shell 1 includes two openings opposite to each other in the length direction L1 of the blade cell, and the two cover plates 3 are respectively arranged on the two openings; the shell 1 includes a reference plane S1 and a second plane opposite to each other in the width direction L2 of the blade cell. Two recessed portions 11 are formed on the shell 1. The two recessed portions 11 are recessed from the two reference planes S1 toward the interior of the shell 1, and the two poles 2 are respectively arranged in the two recessed portions 11. When the blade cell is installed in the box, since the pole 2 is arranged in the recessed portion 11, the pole 2 no longer protrudes. In this way, the pole 2 no longer occupies additional space in the box, the effective volume utilization of the box is improved, and the capacity of the battery pack is increased.
[0032] Furthermore, the size of the shell 1 in the length direction L1 is 300 mm-1200 mm, the size of the shell 1 in the width direction L2 is 80 mm-300 mm, and the size of the shell 1 in the thickness direction L3 is 10 mm-55 mm.
[0033] Optionally, the size of the shell 1 can be selected based on demand. For example, the size of the shell 1 in the length direction L1 can be 320mm, 370mm, 400mm, 440mm, 500mm, 600mm, 700mm, 800mm, 950mm, 1000mm, 1100mm or 1200mm, etc.; the size of the shell 1 in the width direction L2 can be 85mm, 130mm, 150mm, 180mm, 230mm or 270mm, etc., and the size of the shell 1 in the thickness direction L3 can be 25mm, 37mm, 46mm, 58mm, 59mm, 63mm, 65mm, 75mm, 78mm, 80mm or 90mm, etc.
[0034] In addition, one pole 2 serves as a positive pole and the other as a negative pole. The two poles 2 are provided on the housing 1 and are respectively located in the two recesses 11. The two reference planes S1 can play a supporting role to protect the two poles 2 from external pushing and squeezing pressure. A pole group connected to the pole 2 is provided inside the housing 1. The pole group can be composed of a stack of positive electrode sheets, negative electrode sheets, and a diaphragm. The shapes of the positive electrode sheets, negative electrode sheets, and diaphragm can be adaptively adjusted based on the shape of the housing 1.
[0035] Optionally, the two recessed portions 11 can be recessed into the interior of the shell 1 from different positions of the two reference planes S1 respectively. The positions of the two recessed portions 11 can be selected based on actual needs. The blade battery cell of the present application will be described below in combination with Example 1, Example 2 and Example 3.
[0036] Example 1
[0037] In this embodiment, if Figure 1 As shown, the two recessed portions 11 are recessed from the two reference planes S1 along the width direction L2 toward the interior of the housing 1. The dimensions of the recessed portions 11 in the width direction L2 are larger than the dimensions of the poles 2 in the width direction L2, ensuring that the two poles 2 do not protrude relative to the two reference planes S1. The dimensions of the recessed portions 11 in the length direction L1 are larger than the dimensions of the poles 2 in the length direction L1, and the dimensions of the recessed portions 11 in the thickness direction L3 are larger than the dimensions of the poles 2 in the thickness direction L3, ensuring that the recessed portions 11 can accommodate the poles 2.
[0038] Furthermore, the two recessed portions 11 are located in the middle of the reference plane S1 in the length direction L1 , and the positions of the two recessed portions 11 in the length direction L1 coincide with each other.
[0039] Preferably, the ratio of the size of the recessed portion 11 in the length direction L1 to the size of the housing 1 in the length direction L1 is 1 / 10-1 / 3.
[0040] Optionally, when the two recessed portions 11 are located in the middle of the reference plane S1 in the length direction L1 , the positions of the two recessed portions 11 in the length direction L1 may partially overlap or not overlap at all.
[0041] Example 2
[0042] In this embodiment, if Figure 2 As shown, the two recessed portions 11 are recessed from the two reference planes S1 along the width direction L2 toward the interior of the housing 1. The dimensions of the recessed portions 11 in the width direction L2 are larger than the dimensions of the recessed portions 11 in the width direction L2, ensuring that the two poles 2 do not protrude relative to the two reference planes S1. The dimensions of the recessed portions 11 in the thickness direction L3 are larger than the dimensions of the pole 2 in the thickness direction L3. The dimensions of the recessed portions 11 in the length direction L1 are larger than the dimensions of the pole 2 in the length direction L1, ensuring that the accommodation space enclosed by the recessed portions 11 can accommodate the pole 2.
[0043] Furthermore, the two recessed portions 11 are respectively located at the ends of the two reference planes S1 in the length direction L1 , and the two recessed portions 11 are located on different sides in the length direction L1 .
[0044] Preferably, the ratio of the size of the recessed portion 11 in the length direction L1 to the size of the housing 1 in the length direction L1 is 1 / 10-1 / 3.
[0045] Example 3
[0046] In this embodiment, if Figure 3As shown, the two recesses 11 are recessed from the two reference planes S1 toward the inside of the shell 1 in the width direction L2, and the size of the recesses 11 in the width direction L2 is greater than the size of the pole posts 2 in the width direction L2, so as to ensure that the two pole posts 2 do not protrude relative to the two reference planes S1. The size of the recesses 11 in the thickness direction L3 is greater than the size of the pole posts 2 in the thickness direction L3, and the size of the recesses 11 in the length direction L1 is greater than the size of the pole posts 2 in the length direction L1, so as to ensure that the accommodation space surrounded by the recesses 11 can accommodate the pole posts 2.
[0047] Further, the two recesses 11 are located at the ends of the two reference planes S1 in the length direction L1, and the two recesses 11 are located on the same side in the length direction L1.
[0048] Preferably, the ratio of the size of the recesses 11 in the length direction L1 to the size of the shell 1 in the length direction L1 is 1 / 10-1 / 3.
[0049] When the blade battery cell of the present application is installed in the box, this makes the pole posts 2 no longer protrude, so that the pole posts 2 no longer occupy additional space in the box, and there is no need to reserve a safety gap, the effective volume utilization rate of the box is improved, and the capacity of the battery pack is further improved.
[0050] According to another aspect of the present application, a battery pack is provided, which comprises the above-mentioned blade battery cell, and has the same technical effects as the above-mentioned blade battery cell, which will not be described here.
[0051] Further, the battery pack comprises a plurality of blade battery cells, and the plurality of blade battery cells are stacked in the thickness direction L3. The battery pack further comprises a liquid cooling plate, a box, and a cover, the box comprises a surrounding plate and a bottom plate, the surrounding plate is arranged around the bottom plate, and the bottom plate and the surrounding plate surround a placement space, the liquid cooling plate is attached to the side of the bottom plate facing the placement space, the cover is arranged on the box, and the plurality of blade battery cells are arranged in the placement space. The blade battery cell can play a role of supporting the cover or the water cooling plate.
[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A blade battery cell, characterized in that: The blade cell comprises a shell, two poles and two cover plates, the shell comprises two openings opposite to each other in the length direction of the blade cell, and the two cover plates are respectively arranged on the two openings; The housing includes reference planes facing each other in the width direction of the blade cell, and two recessed portions are formed on the housing. The two recessed portions are recessed from the two reference planes toward the interior of the housing, and the two poles are respectively disposed in the two recessed portions; The two recessed portions are respectively recessed from the two reference planes along the width direction toward the interior of the housing, and a dimension of the recessed portions in the width direction is larger than a dimension of the pole in the width direction.
2. The blade battery cell according to claim 1, characterized in that: The two recessed portions are respectively located in the middle of the two reference planes in the length direction.
3. The blade battery cell according to claim 1, characterized in that: The two recessed portions are respectively located at ends of the two reference planes in the length direction, and the two recessed portions are located on different sides in the length direction.
4. The blade battery cell according to claim 1, characterized in that: The two recessed portions are respectively located at ends of the two reference planes in the length direction, and the two recessed portions are located on the same side in the length direction.
5. The blade battery cell according to any one of claims 1 to 4, characterized in that: The size of the shell in the length direction is 300mm-1200mm, the size of the shell in the width direction is 80mm-300mm, and the size of the shell in the thickness direction of the blade battery core is 10mm-55mm.
6. The blade battery cell according to claim 5, characterized in that: The size of the recessed portion in the thickness direction is larger than the size of the pole in the thickness direction, and the size of the recessed portion in the length direction is larger than the size of the pole in the length direction.
7. The blade battery cell according to claim 6, characterized in that: The ratio of the dimension of the recessed portion in the length direction to the dimension of the shell in the length direction is 1 / 10-1 / 3.
8. A battery pack, characterized in that: The battery pack includes the blade battery cell according to any one of claims 1 to 7.
9. The battery pack according to claim 8, characterized in that: The battery pack includes a cover, a box, and a plurality of square battery cells. The plurality of square battery cells are stacked in the box, and the cover is arranged on the box.