Single battery and electric equipment
By using a support plate sandwiched between cells and setting a receiving groove in the single cell, the problem of complex support structure of traditional single cell is solved, achieving higher energy density and safety, and reducing production costs.
Patent Information
- Application Number
- CN202423043384.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In the traditional single-cell battery molding process, the support structure is complex, resulting in slow electrolyte wetting speed, high cost, high manufacturing difficulty, and insufficient reliability and safety.
Several individual battery cells are arranged and stacked along a first direction, and a support plate is used to clamp them between adjacent cells. The support plate has through holes and receiving grooves for storing electrolyte, which simplifies the fixing structure and improves the electrolyte wetting speed.
It achieves high reliability and safety of individual cells, reduces production costs, and improves energy density and electrolyte distribution uniformity, while avoiding negative pressure and adhesion caused by insufficient support plate thickness.
Smart Images
Figure CN223858159U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a single battery and electric equipment. BACKGROUND
[0002] In order to improve single battery capacity and structural reliability, in the traditional single battery forming manufacturing technology, generally adopt the mode of multiple single battery cells series connection or parallel connection to form a big battery cell structure, to improve the capacity and reliability of battery, the support structure needs to be provided with middle support plate, upper support plate and lower support plate, and multiple single battery cells are fixed by inserting and clamping, or multiple support frames are used to fix and compress single battery cells, and the support frame includes the compression plate for spacing multiple single battery cells and multiple support rods for connecting two compression plates.
[0003] The above support structure aims at solving the reliability of single battery group structure and the internal temperature problem of large capacity battery, thereby improving the safety of large capacity battery, but the structure of multiple support plates or support frames for inserting and clamping to fix single battery cells uses more component structures, causes slow internal electrolyte infiltration of single battery cell, and also has technical defects such as high cost and great manufacturing difficulty.
[0004] Therefore, it is urgent to provide a novel single battery and electric equipment, so as to solve the above technical problems in the prior art. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a single battery, which can reduce the production cost of single battery, and has higher energy density and is safer and more reliable in use.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The single battery comprises:
[0008] A plurality of single battery cells, the single battery cells are arranged and stacked along a first direction and formed into a battery cell group;
[0009] A plurality of support plates, one support plate is arranged between each adjacent two single battery cells, a through hole and a receiving groove are formed in each support plate, the through hole penetrates the support plate, and the receiving groove is used for storing electrolyte.
[0010] Optionally, the receiving groove is a through long groove extending along the first direction, a plurality of receiving grooves are arranged at intervals along a third direction, and the first direction is perpendicular to the third direction.
[0011] Optionally, the accommodating grooves are through long grooves extending along the third direction, and the accommodating grooves are arranged at intervals along the second direction, and the first direction is perpendicular to the third direction.
[0012] Optionally, the accommodating grooves are blind holes formed in the support plate, and the accommodating grooves are uniformly distributed in a grid shape.
[0013] Optionally, the support plate is provided with a structural adhesive layer for bonding with the single battery cell on the surface of the single battery cell.
[0014] Optionally, the projection area of the support plate along the first direction is smaller than the projection area of the single battery cell along the first direction.
[0015] Optionally, a plurality of through holes are uniformly distributed on the support plate.
[0016] Optionally, the single battery further comprises a battery shell and a adapter sheet, two ends of the battery shell along the first direction are provided with openings, the tab of the single battery cell is fixedly connected to the adapter sheet, the adapter sheet is provided with an adapter portion at any end along the first direction, and the cell group can be placed into the battery shell from the opening so that the adapter portion is located at the opening.
[0017] Optionally, the outer circumferential wall of the cell group is covered with an insulating film, and the insulating film is clamped between the inner wall of the battery shell and the outer wall of the cell group.
[0018] Another purpose of the utility model is to provide a kind of electric equipment, which comprises the single battery of any of the above schemes.
[0019] Beneficial effects:
[0020] In the utility model, the single battery uses a plurality of single battery cells arranged and stacked along the first direction to form a cell group with large cell structure. When fixing the single battery cells, the support plate is arranged between two adjacent single battery cells, and the single battery cells are fixed on the support plate to fix the two adjacent single battery cells. The single battery has good fixing effect, improves the use reliability and safety of the single battery, and has simpler structure, which can reduce the production cost of the single battery. Meanwhile, the support plate is also provided with accommodating grooves for storing electrolyte. After the single battery cells are assembled into a cell group, the accommodating grooves and through holes on the support plate can provide more electrolyte for the single battery cells, thereby accelerating the infiltration speed of the single battery cells and improving the energy density of the single battery. The accommodating grooves can also avoid the phenomenon of negative pressure and adsorption adhesion between two adjacent support plates when the support plate is produced due to too small thickness of the support plate. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is the isometric view of the single battery cell provided by the embodiment of the utility model;
[0022] Figure 2 is the isometric view of the battery cell group provided by the embodiment of the utility model;
[0023] Figure 3 is the plan view of the support plate in the optional embodiment provided by the embodiment of the utility model;
[0024] Figure 4 is the plan view of the support plate in another optional embodiment provided by the embodiment of the utility model;
[0025] Figure 5 is the plan view of the support plate in still another optional embodiment provided by the embodiment of the utility model;
[0026] Figure 6 is the isometric view of the battery cell group when being put into the battery shell provided by the embodiment of the utility model.
[0027] In the drawings:
[0028] 100, single battery cell; 101, battery cell group; 110, positive pole lug; 120, negative pole lug; 130, insulating film;
[0029] 200, support plate; 210, accommodating groove; 220, through hole;
[0030] 300, adapter piece; 310, adapter part;
[0031] 400, battery shell; 410, opening. EMBODIMENT
[0032] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0033] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, 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, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0034] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, also can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on the" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than the second feature.
[0035] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", "orientation" or "position relationship" are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply 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 on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.
[0036] The first direction in the embodiment is the X direction shown in Figure 1 、 Figure 2 and Figure 6 , that is, the width direction of the single battery cell 100; the second direction is the Y direction shown in Figures 1 to 6 , that is, the length direction of the single battery cell 100; and the third direction is the Z direction shown in Figures 1 to 6 , that is, the thickness direction of the single battery cell 100; the first direction, the second direction and the third direction are perpendicular to each other.
[0037] Please refer to Figures 1 to 3 , the single battery includes a plurality of single battery cells 100 and a plurality of support plates 200, the single battery cells 100 are arranged and stacked along the first direction and are formed into a battery cell group 101, one support plate 200 is arranged between every two adjacent single battery cells 100, a through hole 220 and a containing groove 210 are formed on each support plate 200, the through hole 220 penetrates the support plate 200, and the containing groove 210 is used for storing electrolyte.
[0038] The single battery in the embodiment uses a plurality of single battery cells 100 arranged and stacked along a first direction to form a battery cell group 101 of a large battery cell structure. When the plurality of single battery cells 100 are fixed, the support plate 200 is arranged between two adjacent single battery cells 100, and the single battery cells 100 are fixed on the support plate 200 to fix the two adjacent single battery cells 100. The fixing effect is good, the use reliability and safety of the single battery are improved, the structure is simpler, and the production cost of the single battery can be reduced. Meanwhile, the support plate 200 is also provided with a containing groove 210 for storing electrolyte. After the single battery cells 100 are assembled into the battery cell group 101, the containing groove 210 and the through hole 220 on the support plate 200 can provide more electrolyte for the single battery cells 100, thereby accelerating the infiltration speed of the single battery cells 100 and improving the energy density of the single battery. The containing groove 210 can also avoid the phenomenon of negative pressure and adsorption adhesion between two adjacent support plates 200 when the support plate 200 is produced.
[0039] In the embodiment, the single battery cell 100 is provided with a positive electrode tab 110 at one end along a second direction and a negative electrode tab 120 at the other end. The support plate 200 extends along the second direction. The first direction is perpendicular to the second direction. The positive electrode tab 110 and the negative electrode tab 120 of the single battery cell 100 are arranged at the two ends of the single battery cell 100 along the second direction, respectively. The single battery cell 100 is formed into a structure with electrode tabs on both sides, the process design is simple, and the production cost can be reduced.
[0040] Further, as shown in Figure 3 , the containing groove 210 is a through long groove extending along the second direction. A plurality of containing grooves 210 are arranged along the third direction. Alternatively, as shown in Figure 4 , the containing groove 210 is a through long groove extending along the third direction. A plurality of containing grooves 210 are arranged along the second direction. The containing groove 210 extending along the second direction can be parallel to the pole piece of the single battery cell 100 stacked. The containing groove 210 extending along the third direction can be perpendicular to the pole piece of the single battery cell 100 stacked. The above arrangements can provide a certain amount of electrolyte for the single battery cell 100 and improve the energy density of the single battery cell 100 and the single battery.
[0041] In another optional embodiment, as shown in Figure 5As shown, the accommodation grooves 210 are blind holes, which are in the form of a square, a circle, a triangle, or other polygonal structures, or a combination of multiple shapes. The accommodation grooves 210 are uniformly distributed in the second direction and the third direction. In this embodiment, the cross section of the accommodation grooves 210 is square, and the accommodation grooves 210 are arranged in a grid pattern and provided in a closed form. Compared with the form extending in the second direction or the third direction, the closed form can provide more sufficient electrolyte, but the processing process is more complex and the processing cost is higher. Those skilled in the art can select the shape and distribution form of the accommodation grooves 210 according to specific needs, which will not be described here.
[0042] Preferably, the support plate 200 is provided with the accommodation grooves 210 on both end sides in the first direction, which increases the accommodation capacity of the support plate 200 for the electrolyte, and enables one support plate 200 to provide electrolyte to two single battery cells 100 at the same time, thereby improving the energy density of the single battery.
[0043] Optionally, the support plate 200 is provided with a structural adhesive layer on the surface facing the single battery cell 100, which is used to bond the support plate 200 and the single battery cell 100.
[0044] The support plate 200 in this embodiment is made of at least one of an ET insulating sheet, a PP insulating sheet, a PC insulating sheet, and a PVC insulating sheet. The side wall of the single battery cell 100 is fixed to the support plate 200 by using adhesive paper, adhesive, or double-sided adhesive tape. The fixing method is simple and reliable, and the process design is simple, easy to implement, and has obvious beneficial effects. The materials used are also more inexpensive.
[0045] Optionally, the projection area of the support plate 200 in the first direction is smaller than the projection area of the single battery cell 100 in the first direction, and the first direction, the second direction, and the third direction are perpendicular to each other. That is, the width of the support plate 200 does not exceed the thickness of the single battery cell 100, which avoids the support plate 200 occupying too much space in the third direction, reduces the space occupied by other components in the single battery cell 100, and improves the energy density of the single battery.
[0046] Optionally, the support plate 200 is uniformly distributed with a plurality of through holes 220 penetrating in the first direction. The plurality of through holes 220 not only can reduce the weight of the support plate 200, improve the energy density of the single battery, but also can conduct between the adjacent two single battery cells 100, so that the electrolyte between the adjacent two single battery cells 100 can exchange with each other, so that one support plate 200 can provide electrolyte to two single battery cells 100 at the same time, ensure uniform distribution of electrolyte, and improve the service life of the single battery.
[0047] Please refer to Figure 6 The single battery further includes a battery shell 400 and a adapter sheet 300, both ends of the battery shell 400 in the first direction are provided with openings 410, and a plurality of tab ears of the single battery cell 100 are correspondingly fixedly connected to the adapter sheet 300. The adapter sheet 300 is provided with an adapter portion 310 at any end in the first direction, and the cell group 101 can be placed into the battery shell 400 from the opening 410, so that the adapter portion 310 is located at the opening 410. In this embodiment, the adapter sheet 300 connects a plurality of single battery cells stacked in the first direction in series, and the cell group 101 after forming is provided with the adapter portion 310 of the adapter sheet 300 at both ends in the first direction. The pole of the single battery cell 100 is correspondingly connected to the adapter sheet 300, the electrical connection between the single battery cell 100 and the external structure is realized, and the output of electric energy is realized.
[0048] It should be noted that in this embodiment, the positive tab ear 110 of the plurality of single battery cells 100 is located on the same side of the single battery cell 100 in the second direction, and the negative tab ear 120 is located on the other side of the single battery cell 100 in the second direction. All positive tab ears 110 are connected to one adapter sheet 300, and all negative tab ears 120 are connected to another adapter sheet 300. The adapter portions 310 of the two adapter sheets 300 are respectively arranged at both ends of the cell group 101 in the first direction, and correspond to the openings 410 of the battery shell 400 in the first direction. The single battery is formed into a structure with pole columns at both ends in the first direction, which will not be described here.
[0049] At the same time, the adapter sheet 300 connected with the positive tab ear 110 is made of aluminum, and the adapter sheet 300 connected with the negative tab ear 120 is made of copper. The positive tab ear 110 and the negative tab ear 120 are welded to the corresponding adapter sheet 300, which will not be described here.
[0050] Optionally, the outer peripheral wall surface of the cell group 101 is covered with an insulating film 130, and the insulating film 130 is arranged between the inner wall of the battery shell 400 and the outer wall of the cell group 101. The insulating film 130 can avoid short circuit between the cell group 101 and the battery shell 400, and improve the safety and reliability of the single battery.
[0051] The embodiment also provides a power utilization device including the single battery as described in any of the above solutions. The power utilization device can be a battery pack, an electric vehicle, a hybrid vehicle, an electric ship, an electric bicycle, an energy storage device, etc., which only needs to use the single battery for power supply or energy storage, and is not specifically limited here. The power utilization device uses the single battery as described above, can improve the use reliability and safety of the single battery, ensures the safety of the power utilization device, has a simpler structure, can reduce the production cost of the power utilization device, can improve the wettability of the single battery cell 100 to the electrolyte, improve the energy density of the single battery, and thus improve the endurance of the power utilization device.
[0052] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent substitution and improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model claim.
Claims
1. A single cell characterized by, The single battery comprises: a plurality of single cells (100) arranged and stacked along a first direction and formed into a cell group (101); a plurality of support plates (200), one of which is arranged between every two adjacent single cells (100), and each support plate (200) is provided with a through hole (220) and a receiving groove (210), the through hole (220) penetrates the support plate (200), and the receiving groove (210) is used for storing electrolyte.
2. The cell according to claim 1, wherein The receiving groove (210) is a through long groove extending along the first direction, and a plurality of receiving grooves (210) are arranged at intervals along a third direction, and the first direction is perpendicular to the third direction.
3. The cell according to claim 1, wherein The receiving groove (210) is a through long groove extending along the third direction, and a plurality of receiving grooves (210) are arranged at intervals along a second direction, and the first direction, the second direction and the third direction are perpendicular to each other.
4. The cell according to claim 1, wherein The receiving groove (210) is a blind hole formed in the support plate (200), and a plurality of receiving grooves (210) are uniformly distributed in a grid shape.
5. The cell according to claim 1, wherein The support plate (200) is provided with a structural adhesive layer on the surface facing the single cell (100) for bonding with the single cell (100).
6. The cell according to claim 1, wherein The projection area of the support plate (200) along the first direction is smaller than the projection area of the single cell (100) along the first direction.
7. The cell according to claim 1, wherein A plurality of uniformly distributed through holes (220) are formed in the support plate (200).
8. The single cell according to any one of claims 1 to 7, characterized in that, The single battery further comprises a battery shell (400) and a adapter sheet (300), the battery shell (400) is provided with an opening (410) at both ends along the first direction, a plurality of tab terminals of the single cells (100) are fixedly connected to the adapter sheet (300), the adapter sheet (300) is provided with an adapter part (310) at any end along the first direction, and the cell group (101) can be placed into the battery shell (400) from the opening (410) so that the adapter part (310) is located at the opening (410).
9. The cell according to claim 8, wherein The outer peripheral wall surface of the cell group (101) is covered with an insulating film (130), and the insulating film (130) is arranged between the inner wall of the battery shell (400) and the outer wall of the cell group (101).
10. An electrical device, characterized by The single battery comprises: a plurality of single cells (100) arranged and stacked along a first direction and formed into a cell group (101); a plurality of support plates (200), one of which is arranged between every two adjacent single cells (100), and each support plate (200) is provided with a through hole (220) and a receiving groove (210), the through hole (220) penetrates the support plate (200), and the receiving groove (210) is used for storing electrolyte. The receiving groove (210) is a through long groove extending along the first direction, and a plurality of receiving grooves (210) are arranged at intervals along a third direction, and the first direction is perpendicular to the third direction. The receiving groove (210) is a through long groove extending along the third direction, and a plurality of receiving grooves (210) are arranged at intervals along a second direction, and the first direction, the second direction and the third direction are perpendicular to each other. The receiving groove (210) is a blind hole formed in the support plate (200), and a plurality of receiving grooves (210) are uniformly distributed in a grid shape. The support plate (200) is provided with a structural adhesive layer on the surface facing the single cell (100) for bonding with the single cell (100). The projection area of the support plate (200) along the first direction is smaller than the projection area of the single cell (100) along the first direction. A plurality of uniformly distributed through holes (220) are formed in the support plate (200). The single battery further comprises a battery shell (400) and a adapter sheet (300), the battery shell (400) is provided with an opening (410) at both ends along the first direction, a plurality of tab terminals of the single cells (100) are fixedly connected to the adapter sheet (300), the adapter sheet (300) is provided with an adapter part (310) at any end along the first direction, and the cell group (101) can be placed into the battery shell (400) from the opening (410) so that the adapter part (310) is located at the opening (410). The outer peripheral wall surface of the cell group (101) is covered with an insulating film (130), and the insulating film (130) is arranged between the inner wall of the battery shell (400) and the outer wall of the cell group (101).