Battery, battery module and electric equipment

Abstract

The utility model discloses a battery, a battery module and electric equipment, and belongs to the technical field of new energy. The aluminum-plastic film comprises a first packaging part, a second packaging part and a public edge sealing part, a first containing cavity is defined by the first packaging part, a second containing cavity is defined by the second packaging part, the first containing cavity and the second containing cavity contain the battery cells respectively, and the public edge sealing part is arranged between the first packaging part and the second packaging part. The first packaging part and the second packaging part are connected through a common edge sealing part; wherein the first packaging part and the second packaging part are arranged in a stacked mode, and the common edge sealing part is connected to the same end of the first packaging part and the same end of the second packaging part. According to the battery, the first packaging part and the second packaging part share the common edge sealing part, so that the width of a single battery is equal to the sum of the thickness of two layers of folded edges on the left side, the width of the battery main body and the thickness of a single layer of folded edge on the right side, and the width of the single battery is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy technology field especially, relate to a kind of battery, battery module and electric equipment. BACKGROUND

[0002] In order to pursue greater battery capacity, longer battery endurance and faster charging speed, 3C electronic equipment such as mobile phone, tablet computer begins to adopt multiple battery series connection to improve voltage and power.

[0003] In related art, each battery is packaged separately, and then placed side by side or stacked together. The battery often adopts double folding edge process to improve battery performance and enhance the safety of the battery. When the batteries are placed side by side, there will be at least six layers of folding edges between adjacent batteries, which will cause the distance between adjacent batteries to be large, affecting the energy density of the battery module. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery, which can reduce the distance between batteries, which is beneficial to further reducing the volume of the battery or further improving the energy density.

[0005] The utility model further provides a battery module with the above-mentioned battery.

[0006] The utility model further provides an electric device with the above-mentioned battery module.

[0007] According to the first aspect embodiment of the utility model, the battery comprises an aluminum plastic film and a plurality of battery cells:

[0008] The aluminum plastic film comprises a first packaging portion, a second packaging portion and a common sealing edge portion. The first packaging portion defines a first accommodating cavity, and the second packaging portion defines a second accommodating cavity. The first accommodating cavity and the second accommodating cavity accommodate the battery cells respectively. The first packaging portion and the second packaging portion are connected by the common sealing edge portion.

[0009] Among them, the first packaging portion and the second packaging portion are stacked, and the common sealing edge portion is connected to the same end of the first packaging portion and the second packaging portion.

[0010] According to the battery of the utility model embodiment, at least the following beneficial effects are achieved:

[0011] In the related art, the width of a single battery is equal to the thickness of two layers of the left side folding edge + the width of the battery body + the thickness of two layers of the right side folding edge, while in the present application, since the first packaging part and the second packaging part share the common edge part, the width of a single battery is equal to the thickness of two layers of the left side folding edge + the width of the battery body + the thickness of a single layer of the right side folding edge, thereby reducing the width of a single battery. When a plurality of batteries are assembled into a battery module, the batteries are grouped two by two, the batteries in the same group are arranged side by side, and the common edge part is arranged in close contact, so that the spacing of the batteries in the same group is the thickness of two layers of the folding edge. Compared with the spacing between adjacent batteries in the related art, which is four layers of the folding edge, the battery of the present application can greatly reduce the spacing between the batteries, thereby facilitating further reduction of the battery volume or further improvement of the energy density.

[0012] According to some embodiments of the present application, the first accommodating cavity is located on one side of the first packaging part facing the second packaging part, and the second accommodating cavity is located on one side of the second packaging part facing away from the first packaging part.

[0013] According to some embodiments of the present application, the aluminum plastic film comprises a first shell and a second shell, the first shell defines a first pit and a second pit, and the second shell is connected to the first shell to close the first pit to form the first accommodating cavity and close the second pit to form the second accommodating cavity.

[0014] According to some embodiments of the present application, the size of the common edge part along the stacking direction is not less than the thickness sum of the first packaging part and the second packaging part.

[0015] According to some embodiments of the present application, the size A of the common edge part along the stacking direction, the thickness H1 of the first packaging part, and the thickness H2 of the second packaging part have the following relationship: 1.5mm > A-H1-H2 > 0.2mm.

[0016] According to some embodiments of the present application, the first packaging part further comprises a first edge enclosing the first accommodating cavity, and the second packaging part further comprises a second edge enclosing the second accommodating cavity, and the first edge and the second edge overlap to form the common edge part.

[0017] According to some embodiments of the present application, the first accommodating cavity is located on one side of the first packaging part facing the second packaging part, and the second accommodating cavity is located on one side of the second packaging part facing away from the first packaging part.

[0018] Alternatively, the first accommodating cavity is formed on one side of the first packaging part facing away from the second packaging part, and the second accommodating cavity is formed on one side of the second packaging part facing away from the first packaging part.

[0019] According to some embodiments of the present application, two of the battery cells are arranged in series or in parallel.

[0020] According to some embodiments of the present application, the common edge sealing part comprises a sealing section and a transition section, two sides of the sealing section are connected with the first packaging part and the second packaging part through the transition section, the aluminum plastic film comprises a first shell and a second shell arranged in layers, the first shell and the second shell at the sealing section are connected, the first shell and the second shell at the transition section define a liquid supplement cavity, and the first accommodating cavity and the second accommodating cavity are respectively communicated with the liquid supplement cavity on the corresponding side.

[0021] According to some embodiments of the present application, the size A of the common edge sealing part along the layering direction and the size B of the sealing section along the layering direction have the following relationship: A > B, and B > 0.1mm.

[0022] According to the second aspect of the battery module of the present application, the battery comprises any one of the above embodiments.

[0023] According to some embodiments of the present application, the battery module comprises at least two of the battery, and the batteries are arranged in groups, and the common edge sealing parts of the batteries in the same group are arranged oppositely.

[0024] According to some embodiments of the present application, two battery cells in the same battery are arranged in series, and two batteries in the same group are arranged in series, wherein the arrangement positions of the positive and negative electrode ears of each battery cell are the same.

[0025] Alternatively, two battery cells in the same battery are arranged in parallel, and two batteries in the same group are arranged in parallel, wherein the arrangement positions of the positive and negative electrode ears of the two battery cells in the same battery are opposite.

[0026] Alternatively, two battery cells in the same battery are arranged in parallel, and two batteries in the same group are arranged in series, wherein the arrangement positions of the positive and negative electrode ears of the two battery cells in the same battery are opposite.

[0027] According to some embodiments of the present application, the common edge sealing parts of the batteries in the same group are connected with each other.

[0028] Alternatively, the battery module further comprises a frame body, and each battery is connected with the frame body to define the relative positions of the batteries in the same group.

[0029] According to the third aspect of the power consumption equipment of the present application, the battery module comprises any one of the above embodiments.

[0030] The additional aspects and advantages of the present application will be given partly in the following description, partly will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0032] Figure 1 Structure diagram of a plurality of batteries arranged in parallel and stacked in the related art;

[0033] Figure 2 Structure diagram of a battery in an assembled state according to an embodiment of the present application;

[0034] Figure 3 Structure diagram of a battery in an initial state according to an embodiment of the present application; Figure 2

[0035] Structure diagram of a battery in an initial state according to an embodiment of the present application; Figure 4

[0036] Structure diagram of a battery in an initial state according to an embodiment of the present application; Figure 5 Figure 4 Structure diagram of a battery in an initial state according to an embodiment of the present application;

[0037] Figure 6 Figure 5 Structure diagram of a battery in an initial state according to an embodiment of the present application;

[0038] Figure 7 Structure diagram of a battery module according to an embodiment of the present application;

[0039] Figure 8 Simplified structure diagram of a battery module according to an embodiment of the present application from another angle;

[0040] Figure 9 Connection diagram of a common edge sealing part and a first packaging part according to an embodiment of the present application;

[0041] Figure 10 Edge sealing diagram according to an embodiment of the present application;

[0042] Figure 11 Edge sealing diagram according to another embodiment of the present application;

[0043] Figure 12 Circuit connection diagram (Scheme I) according to an embodiment of the present application;

[0044] Figure 13 Circuit connection diagram (Scheme II) according to an embodiment of the present application;

[0045] Figure 14 Circuit connection diagram (Scheme III) according to an embodiment of the present application.​​

[0046] Reference signs:

[0047] Battery 10; first battery 11; second battery 12;

[0048] Aluminum plastic film 100; first shell 101; first punch pit 1011; second punch pit 1012; second shell 102; first packaging part 110; first accommodating cavity 111; second packaging part 120; second accommodating cavity 121; common edge sealing part 130; sealing section 131; transition section 132; liquid supplement cavity 133; first corner seal 140; second corner seal 150;

[0049] Battery cell 200; first battery cell 210; second battery cell 220; third battery cell 230; fourth battery cell 240; DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0051] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0052] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0053] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0054] In the description of the utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative 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.

[0055] In order to pursue greater battery capacity, longer battery life and faster charging speed, 3C electronic devices such as mobile phones and tablets begin to use multiple batteries in series to increase voltage and power.

[0056] In the related art, as shown in Figure 1 Each battery is individually packaged, then placed side by side or stacked together. The battery often uses a double-folded edge process to improve battery performance and enhance battery safety. When the batteries are placed side by side, there will be at least six layers of folded edges between adjacent batteries, which will cause the spacing between adjacent batteries to be large, affecting the energy density of the battery module.

[0057] To solve the above problems, the first aspect embodiment of the application provides a battery 10, which comprises an aluminum plastic film 100 and a battery core 200. Referring to Figures 1 to 6 As shown in Figure 5 and Figure 6 The first packaging part 110 defines a first accommodating cavity 111, and the second packaging part 120 defines a second accommodating cavity 121. The first accommodating cavity 111 and the second accommodating cavity 121 are both relatively sealed and not connected to each other, and the first accommodating cavity 111 and the second accommodating cavity 121 accommodate the battery core 200 and the electrolyte respectively to perform electrochemical reactions. The first packaging part 110 and the second packaging part 120 are connected by the common sealing edge part 130. As shown in Figure 2 and Figure 3 The first packaging part 110 and the second packaging part 120 are stacked, and the common sealing edge part 130 is connected to the same end of the first packaging part 110 and the second packaging part 120.

[0058] It should be noted that the battery 10 has an initial state before folding and an assembled state after folding. In the initial state, as shown in Figures 4 to 6As shown, the aluminum plastic film 100 extends horizontally, the first packaging part 110 and the second packaging part 120 are arranged in parallel and spaced apart along the length direction of the aluminum plastic film 100, and the common edge sealing part 130 is between the first packaging part 110 and the second packaging part 120. The aluminum plastic film 100 includes a first shell 101 and a second shell 102, as shown in the embodiment Figure 5 and Figure 6 As an example, the first shell 101 is defined with a first punch pit 1011 and a second punch pit 1012, the second shell 102 is connected to the first shell 101 and covers the first punch pit 1011 and the second punch pit 1012, so as to close the first punch pit 1011 to form a first accommodating cavity 111 and close the second punch pit 1012 to form a second accommodating cavity 121. The first shell 101 and the second shell 102 are connected by heat pressing, hot melting, gluing and other packaging processes. When packaging, edge sealing needs to be performed around the four sides of the punch pit to form a closed accommodating cavity. In the embodiment, the right side edge sealing of the first punch pit 1011 is formed on the common edge sealing part 130, and the left side edge sealing of the second punch pit 1012 is also formed on the common edge sealing part 130.

[0059] It should be noted that the right side edge sealing of the first punch pit 1011 and the left side edge sealing of the second punch pit 1012 can be formed at one time, that is, the first accommodating cavity 111 and the second accommodating cavity 121 are separated by one-time edge sealing; or, the right side edge sealing of the first punch pit 1011 and the left side edge sealing of the second punch pit 1012 can also be formed at two times, for example, after the right side edge sealing of the first punch pit 1011 is performed, the left side edge sealing of the second punch pit 1012 is performed, and the right side edge sealing of the first punch pit 1011 and the left side edge sealing of the second punch pit 1012 are combined to form the common edge sealing part 130 of the present application.

[0060] After the battery 10 is packaged, an initial state as shown in Figure 4 is formed, and then the common edge sealing part 130 is bent and folded to make the first packaging part 110 and the second packaging part 120 arranged in layers, so as to form an assembled state as shown in Figure 2 . In the assembled state, as shown in Figure 2 , the battery 10 includes two electric cores 200 arranged in layers, wherein the left side edge sealings of the two electric cores 200 are folded by a double edge sealing process, and the right side edge sealing of the two electric cores 200 is realized by the common edge sealing part 130.

[0061] Based on the above, the two electric cores 200 of the present application share the common edge sealing part 130, which can reduce the number of edge sealings in the process and improve the packaging efficiency of the battery 10. It can also reduce the material loss caused by cutting and edge sealing, and improve the utilization rate of the aluminum plastic film 100. In addition, the setting of the common edge sealing part 130 reduces the width size of the battery 10, which is beneficial to improve the energy density of the battery 10.

[0062] As shown in Figure 1 , in the related art, the width of a single battery is equal to the thickness of the three-layered edge on the left + the width of the battery body + the thickness of the three-layered edge on the right, while in the present application, as shown in Figure 3 , since the first packaging part 110 and the second packaging part 120 share the common edge part 130, the width of a single battery 10 is equal to the thickness of the three-layered edge on the left (the edge is not shown in the figure, please refer to Figure 8 ) + the width of the battery body + the thickness of the single-layered common edge part 130 on the right, it should be noted that the thickness of the single-layered edge is equal to the sum of the thicknesses of the first shell 101 and the second shell 102, and the thickness of the common edge part 130 is also equal to the sum of the thicknesses of the first shell 101 and the second shell 102. Therefore, the thickness of the common edge part 130 is equal to the thickness of the single-layered edge. Thus, compared with the width of the battery in the related art, the width of the battery 10 of the present application is greatly reduced.

[0063] When a plurality of batteries 10 are assembled into a battery module, the batteries 10 are grouped two by two, as shown in Figure 8 , the batteries 10 in the same group are arranged side by side and the common edge part 130 is arranged in close contact, so that the spacing between the batteries 10 in the same group is the thickness of the two-layered edge, compared with the spacing between the adjacent batteries 10 in the related art, which is the thickness of the six-layered edge (as shown in Figure 1 ), the battery 10 of the present application can greatly reduce the spacing between the batteries 10, thereby facilitating further reduction of the volume of the battery 10 or further improvement of the energy density.

[0064] It should be noted that in the related art, the aluminum plastic film 100 needs to be cut off for edge sealing and the folding of the edge sealing is performed by using a double-edge sealing process, which has the purpose of protecting the edge sealing section to avoid short circuit, the battery 10 of the present application includes two battery cells 200, and the aluminum plastic film 100 does not need to be cut off for edge sealing of the two battery cells 200, the two battery cells 200 share the common edge part 130, and therefore there is no edge sealing section at the common edge part 130, thereby improving the safety of the battery 10.

[0065] For the edge sealing of a single battery cell 200, the edge sealing size has certain requirements. Taking the case where a battery module requires two battery cells 200 in series as an example, if the structure of two single battery cells in series is used in the related art, each battery needs at least aluminum plastic film with two edge sealing widths + one battery cell width, and two batteries need at least aluminum plastic film with four edge sealing widths + two battery cell widths.

[0066] For the battery 10 of this application, since it adopts a structure in which two cells 200 share a common sealing edge 130, it is possible to achieve the same charging speed and output power as two parallel batteries 10 in related technologies. Therefore, the production of the battery 10 of this application only requires an aluminum-plastic film 100 with a sealing edge width of three + two cell 200 widths, thereby reducing the production cost of the battery 10.

[0067] During the folding process of switching the battery 10 from its initial state to its assembled state, various folding schemes exist depending on the length of the common sealing edge 130. For example, in... Figure 3 In the illustrated embodiment, the aluminum-plastic film 100 folds the sides of the first packaging section 110 and the second packaging section 120 where the receiving cavities are formed towards each other. That is, after the aluminum-plastic film 100 is folded, the first receiving cavity 111 is located on the side of the first packaging section 110 facing the second packaging section 120, and the second receiving cavity 121 is located on the side of the second packaging section 120 facing the first packaging section 110. Therefore, the dimension of the common sealing edge portion 130 along the lamination direction is not less than the sum of the thicknesses of the first packaging section 110 and the second packaging section 120. It is understood that the common sealing edge portion 130 can be vertically arranged along the lamination direction. Alternatively, the common sealing edge portion 130 can be arranged with a certain curvature along the lamination direction.

[0068] Furthermore, the dimension A of the common sealing portion 130 along the lamination direction, the thickness H1 of the first packaging portion 110, and the thickness H2 of the second packaging portion 120 have the following relationship: 1.5mm > A - H1 - H2 > 0.2mm. That is, the dimension of the common sealing portion 130 along the lamination direction is greater than the sum of the thicknesses of the first packaging portion 110 and the second packaging portion 120, thus allowing for some expansion space. However, the dimension of the common sealing portion 130 cannot be too large; excessive folding allowance will not only reduce energy density but also worsen safety performance such as drop resistance.

[0069] Therefore, the present application conducted the following drop test to verify the optimal size range of the common edge banding 130.

[0070] A fully charged battery (battery 10) was dropped freely from a height of 1 meter onto a concrete slab, once in each of the six directions (X, Y, Z, positive and negative). Voltage and internal resistance were measured before and after the test. Three batteries were tested in total. The passing criteria for the drop test were: the battery did not catch fire, explode, or smoke; the internal resistance change was less than 10mΩ; and the cell voltage change was less than 0.1V. The table below shows the drop test results:

[0071]

[0072] Therefore, it can be seen that when the range of A-H1-H2 is within the range of 0.2mm to 1.5mm, the battery 10 can pass the drop test and has good safety performance.

[0073] It can be understood that the opposite walls of the first packaging part 110 and the second packaging part 120 can be directly abutted, or an insulation pad for heat insulation or an insulation pad for supporting and buffering is arranged between the first packaging part 110 and the second packaging part 120, which can separate the first packaging part 110 and the second packaging part 120 and also can fix the first packaging part 110 and the second packaging part 120 to avoid relative displacement.

[0074] Further, based on the folding and assembling state as shown in Figure 4 and Figure 5 , the first punch 1011 and the second punch 1012 are formed on the first shell 101, and the second shell 102 does not need a punch.

[0075] It can be understood that after the first shell 101 and the second shell 102 are connected in a sealing manner, a first sealing edge surrounding the first accommodation cavity 111 is formed on the first packaging part 110, and a second sealing edge surrounding the second accommodation cavity 121 is formed on the second packaging part 120, and the first sealing edge and the second sealing edge overlap to form a common sealing edge part 130.

[0076] In other embodiments (not shown in the drawings), after the aluminum-plastic film 100 is folded, the first accommodation cavity 111 is located on the side of the first packaging part 110 facing the second packaging part 120, and the second accommodation cavity 121 is located on the side of the second packaging part 120 facing away from the first packaging part 110. Therefore, the length of the common sealing edge part 130 is not less than the thickness of the first packaging part 110. The first punch 1011 is formed on the first shell 101, and the second punch 1012 is formed on the second shell 102. After the first shell 101 and the second shell 102 are connected, the first punch 1011 and the second punch 1012 are staggered and form the common sealing edge part 130 therebetween.

[0077] In other embodiments, after the aluminum-plastic film 100 is folded, the first accommodation cavity 111 is formed on the side of the first packaging part 110 facing away from the second packaging part 120, and the second accommodation cavity 121 is formed on the side of the second packaging part 120 facing away from the first packaging part 110. The battery 10 of this structure is suitable for occasions where the sealing edge requirement is short, for example, an insulation pad is arranged between the first packaging part 110 and the second packaging part 120, and the length of the common sealing edge part 130 only needs to be not less than the thickness of the insulation pad.

[0078] It should be noted that for the case where the size of the common sealing edge part 130 is large as shown in Figure 3 , it is not necessary to heat seal all the common sealing edge part 130 in actual production. Specifically, in some embodiments, in combination with Figure 3 and Figure 9As shown, the common sealing edge portion 130 includes a sealing section 131 and a transition section 132, and the sealing section 131 is provided with the transition section 132 on both sides. It should be noted that the first shell 101 and the second shell 102 at the sealing section 131 are connected together by heat sealing or other connection methods, and the first shell 101 and the second shell 102 at the transition section 132 are not heat sealed, so that the first shell 101 and the second shell 102 at the transition section 132 define a liquid supplement cavity 133, which is separated by the sealing section 131 and communicates with the first containing cavity 111 and the second containing cavity 121.

[0079] It can be understood that, taking the communication between the liquid supplement cavity 133 and the first containing cavity 111 as an example, although the common sealing edge portion 130 is arranged to intersect with the first packaging portion 110 in the embodiment shown, and the shell at the connection between the common sealing edge portion 130 and the first packaging portion 110 is bent, which may block the circulation of the electrolyte between the first containing cavity 111 and the liquid supplement cavity 133, but in the process of the battery cycle, the electrolyte in the first containing cavity 111 is consumed continuously, and the thickness and width of the battery cell expand, at this time, the liquid supplement cavity 133 is pressed by the expansion, and the electrolyte in the liquid supplement cavity 133 can be pressed into the first containing cavity 111 along with the expansion, to supplement the electrolyte in the first containing cavity 111 and improve the cycle life. Figure 3

[0080] Further, the dimension A of the common sealing edge portion 130 along the stacking direction and the dimension B of the sealing section 131 along the stacking direction have the following relationship: A > B, and B > 0.1 mm, so as to ensure that the strength at the sealing section 131 can meet the requirements of the battery.

[0081] As shown in the embodiment shown, in the state that the aluminum plastic film 100 has not been folded, since the common sealing edge portion 130 has the unsealed transition section 132, the battery cell 200 in the containing cavity has a large activity space, and there is a risk of position deviation of the battery cell 200. Therefore, in some embodiments, the position of the battery cell 200 in the containing cavity is limited. Figure 10 Specifically, the battery cell 200 includes opposite first and second ends, and the first end is provided with a tab, and the second end is not provided with a tab. The battery cell 200 includes four corner positions, and the first and second ends each include two corner positions. Since the tab will be clamped between the first shell 101 and the second shell 102 during the sealing process, the position of the first end of the battery cell in the containing cavity is often fixed, but the second end of the battery cell has a risk of deviation towards the transition section 132 of the common sealing edge portion 130.

[0082]

[0083] ​​For the convenience of description, the corner position of the second end of the battery cell 200 and close to the common sealing edge part 130 is set as the first corner position, and the first packaging part 110 is further provided with a first corner seal 140, which is arranged corresponding to the first corner position of the battery cell 200 in the first packaging part 110. Similarly, the second packaging part 120 can also be provided with a first corner seal 140, which is arranged corresponding to the first corner position of the battery cell 200 in the second packaging part 120. The first corner seal 140 can be an arc-shaped seal as shown, or a dot-shaped seal, a rectangular seal, or a circular seal arranged outside the transition section 132 and corresponding to the side edge of the battery cell 200. Figure 10

[0084] The arrangement of the first corner seal 140 limits the movement of the battery cell 200 in the first accommodating cavity 111 and / or the second accommodating cavity 121 towards the common sealing edge part 130, thereby avoiding the problem of position deviation of the battery cell 200 and improving the yield of the battery cell 200. Moreover, the arc-shaped corner seal as shown can avoid the problem of stress concentration at the first corner position of the battery cell 200 and reduce the probability of damage of the aluminum plastic film 100 at the first corner position when the battery cell 200 expands. Figure 10

[0085] Further, as shown, the corner position of the first end of the battery cell 200 and close to the common sealing edge part 130 is set as the second corner position, and the first packaging part 110 includes a second corner seal 150 arranged corresponding to the second corner position of the battery cell 200 in the first packaging part 110. Similarly, the second packaging part 120 can also include a second corner seal 150 arranged corresponding to the second corner position of the battery cell 200 in the second packaging part 120. It can be understood that since the aluminum plastic film 100 needs to be folded at the first corner position and the second corner position to enable the first packaging part 110 and the second packaging part 120 to be stacked, the first corner position and the second corner position of the two battery cells 200 are both places of stress concentration, and by additionally arranging a corner seal, the stress can be dispersed and the probability of damage of the aluminum plastic film 100 can be reduced. Figure 11

[0086] Further (not shown in the figure), corner seals are also arranged for the other two corner positions of the battery cell 200. Specifically, the two corner positions away from the common sealing edge part 130 are set as the third corner positions, and the first packaging part 110 includes a third corner seal arranged corresponding to the third corner position of the battery cell 200 in the first packaging part 110. Similarly, the second packaging part 120 can also include a third corner seal arranged corresponding to the third corner position of the battery cell 200 in the second packaging part 120. Thus, when the battery cell 200 is in the accommodating cavity, the four corner positions are all limited and protected by the corner seals, thereby improving the position stability of the battery cell 200 in the accommodating cavity and reducing the probability of damage of the aluminum plastic film 100 at the corner positions of the battery cell 200.​​​

[0087] In some embodiments, the two cells 200 in the battery 10 can be arranged in series or in parallel, and can be designed according to specific use scenarios.

[0088] The second aspect embodiment of the present application provides a battery module, which includes the battery 10 mentioned in the above embodiments.

[0089] Further, as shown in Figure 8 , the battery module includes at least two batteries 10 of the double cell 200, and the batteries 10 are arranged in a group, and the common edge portions 130 of the batteries 10 in the same group are arranged opposite to each other. Thus, the spacing between the batteries 10 in the same group is greatly reduced.

[0090] Further, the two batteries 10 in the same group can be arranged in series or in parallel. Combined with the series-parallel connection of the two cells 200 in the same battery 10, there are three electrical connection schemes in total: It should be noted that, for the convenience of description, the battery 10 on the left side in Figure 12 to Figure 14 is named as the first battery 11, and the battery 10 on the right side is named as the second battery 12. The cell 200 on the upper side in the first battery 11 is named as the first cell 210, and the cell 200 on the lower side in the first battery 11 is named as the second cell 220. The cell 200 on the upper side in the second battery 12 is named as the third cell 230, and the cell 200 on the lower side in the second battery 12 is named as the fourth cell 240.

[0091] Scheme one: the two cells 200 in the same battery 10 are arranged in series, and the batteries 10 in the same group are arranged in series;

[0092] As shown in Figure 12 , the four cells 200 are arranged in series, and the two cells 200 in the same battery 10 are the same, and the cells 200 of different batteries 10 are also the same.

[0093] It should be noted that, herein, the same or different is based on the position of the tab on the cell and whether the polarity of the tab at the same position is the same, and the first cell 210 and the second cell 220 are taken as examples, referring to Figure 5 and Figure 12 , when the first cell 210 is placed in the first pit, the tab on the left side should be the positive tab, and the tab on the right side should be the negative tab, and when the second cell 220 is placed in the second pit, the tab on the left side should be the positive tab, and the tab on the right side should be the negative tab, and the positions of the tabs are the same, so the first cell 210 and the second cell 220 are the same.

[0094] The tabs of the first battery cell 210 and the second battery cell 220 are positioned at the same location, and the polarity of the tabs at the same location is the same. Therefore, when the sides of the first packaging section 110 and the second packaging section 120 with the receiving cavity are folded towards each other, the tabs of the first battery cell 210 are both located above the tabs of the second battery cell 220, and the positive tab of the first battery cell 210 is positioned corresponding to the negative tab of the second battery cell 220, and the negative tab of the first battery cell 210 is positioned corresponding to the positive tab of the second battery cell 220.

[0095] The same applies to the third cell 230 and the fourth cell 240. Furthermore, the positive and negative tabs of the first cell 210, second cell 220, third cell 230, and fourth cell 240 are positioned in the same way. Thus, in the four-cell series connection scheme of Scheme 1, the circuit connection can be achieved using a shorter connecting wire.

[0096] Option 2: Two cells 200 from the same battery 10 are connected in parallel; batteries 10 in the same group are connected in parallel; for example... Figure 13 As shown, the first battery cell 210 and the second battery cell 220 are connected in parallel, the third battery cell 230 and the fourth battery cell 240 are connected in parallel, and the first battery 11 and the second battery 12 are connected in parallel.

[0097] In this design, the first battery cell 210 and the second battery cell 220 have the same tab placement, but the tabs at the same positions have opposite polarities. That is, the positive and negative tabs of the first battery cell 210 and the second battery cell 220 are positioned oppositely. Similarly, the positive and negative tabs of the third battery cell 230 and the fourth battery cell 240 are positioned oppositely. Therefore, the first battery cell 210 and the fourth battery cell 240 are identical, and the second battery cell 220 and the third battery cell 230 are identical. After folding, they form the following... Figure 13 The structure shown allows the positive tab of the first cell 210 to be positioned above the positive tab of the second cell 220, enabling the connecting wires to directly connect the two positive tabs. The same applies to the negative tab, thus achieving parallel connection of the two cells 200.

[0098] Option 3: Two cells 200 in the same battery 10 are connected in parallel, and batteries 10 in the same group are connected in series; for example... Figure 14 As shown, the first battery cell 210 and the second battery cell 220 are connected in parallel, the third battery cell 230 and the fourth battery cell 240 are connected in parallel, and the first battery 11 and the second battery 12 are connected in series.

[0099] In this scheme, the positive and negative tabs of the first cell 210 and the second cell 220 are positioned oppositely, as are the positive and negative tabs of the third cell 230 and the fourth cell 240. Therefore, the first cell 210 and the fourth cell 240 are identical, and the second cell 220 and the third cell 230 are identical. The cell distribution in this third scheme is the same as that in the second scheme, but the circuit connection method has changed.

[0100] In addition, it can be found that, in the battery module of the present application, by adopting the laminated structure of the double battery cells 200 sharing the common sealing edge part 130, the two batteries 10 in the same group can have better consistency, for example, as shown in Figures 12 to 14 The height of the tab of the first battery cell 210 is consistent with the height of the tab of the third battery cell 230, and the height of the tab of the second battery cell 220 is consistent with the height of the tab of the fourth battery cell 240, so that when designing the protection plate (a component connected with the battery 10, which plays the role of battery protection, monitoring and balancing the electric quantity, etc.), the setting height of the point on the protection plate for connecting with each tab can be relatively consistent, thereby reducing the design difficulty of the protection plate and facilitating the layout of the circuit on the protection plate.

[0101] In some embodiments, based on the foregoing, the common sealing edge parts of the two batteries 10 in the same group are arranged opposite to each other and connected with each other, and the connection mode can be adhesion or other connection modes. Thus, the two batteries 10 in the same group are connected as a whole structure. In other embodiments, the battery module further comprises a frame body, and the two batteries 10 in the same group are respectively connected with the frame body, and the connection mode can be adhesion of the top surface and the bottom surface of the battery 10 to the frame body, or other connection modes such as clamping to realize the fixation of the single battery 10 to the frame body, thereby realizing the position fixation between the two batteries 10 in the same group.

[0102] The third aspect embodiment of the present application proposes a power consumption device, which comprises the battery module mentioned in the above embodiments. It can be understood that the power consumption device can be a 3C digital device such as a mobile phone, a computer, a camera, etc., can be a power tool such as a power drill, an electric grinding wheel, etc., can be a household appliance such as an electric vacuum cleaner, a sweeping robot, etc., or can be a transportation tool such as a new energy vehicle, etc., and the battery module can also be applied to the field of outdoor equipment, industrial equipment, etc., and various applications that can be made by those skilled in the art within the scope of the knowledge possessed by those skilled in the art are not enumerated here.

[0103] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the scope of the knowledge possessed by those skilled in the art without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery, characterized in that, Includes aluminum-plastic film and multiple battery cells: The aluminum-plastic film includes a first packaging section, a second packaging section, and a common sealing section. The first packaging section defines a first receiving cavity, and the second packaging section defines a second receiving cavity. The first receiving cavity and the second receiving cavity respectively house the battery cell. The first packaging section and the second packaging section are connected through the common sealing section. The first packaging section and the second packaging section are stacked, and the common sealing section is connected to the same end of the first packaging section and the second packaging section.

2. The battery according to claim 1, characterized in that, The first receiving cavity is located on the side of the first packaging section facing the second packaging section, and the second receiving cavity is located on the side of the second packaging section facing the first packaging section.

3. The battery according to claim 2, characterized in that, The aluminum-plastic film includes a first shell and a second shell. The first shell defines a first dent and a second dent. The second shell is connected to the first shell to close the first dent to form the first receiving cavity and to close the second dent to form the second receiving cavity.

4. The battery according to claim 2, characterized in that, The dimension of the common sealing portion along the stacking direction is not less than the sum of the thicknesses of the first packaging portion and the second packaging portion.

5. The battery according to claim 4, characterized in that, The dimension A of the common sealing portion along the stacking direction, the thickness H1 of the first packaging portion, and the thickness H2 of the second packaging portion have the following relationship: 1.5mm > A-H1-H2 > 0.2mm.

6. The battery according to claim 2, characterized in that, The first packaging section further includes a first sealing edge surrounding the first receiving cavity, and the second packaging section further includes a second sealing edge surrounding the second receiving cavity, wherein the first sealing edge and the second sealing edge overlap to form the common sealing edge section.

7. The battery according to claim 1, characterized in that, The first accommodating cavity is located on the side of the first packaging section facing the second packaging section, and the second accommodating cavity is located on the side of the second packaging section away from the first packaging section; Alternatively, the first receiving cavity is formed on the side of the first packaging portion opposite to the second packaging portion, and the second receiving cavity is formed on the side of the second packaging portion opposite to the first packaging portion.

8. The battery according to claim 1, characterized in that, The two cells are connected in series or in parallel.

9. The battery according to claim 1, characterized in that, The common sealing section includes a sealing section and a transition section. The two sides of the sealing section are respectively connected to the first packaging section and the second packaging section through the transition section. The aluminum-plastic film includes a first shell and a second shell stacked together. The first shell and the second shell at the sealing section are connected. The first shell and the second shell at the transition section define a liquid replenishment cavity. The first accommodating cavity and the second accommodating cavity are respectively connected to the liquid replenishment cavity on the corresponding side.

10. The battery according to claim 9, characterized in that, The dimension A of the common sealing portion along the stacking direction and the dimension B of the sealing section along the stacking direction have the following relationship: A > B, and B > 0.1 mm.

11. The battery according to claim 1, characterized in that, The battery cell includes a first end with a tab and a second end opposite to the first end, and the battery cell has four corner positions, with the corner position located at the second end of the battery cell and close to the common sealing edge being designated as the first corner position; Wherein, the first packaging section includes a first corner seal, the first corner seal being disposed at a first corner position corresponding to the battery cell in the first packaging section; and / or, the second packaging section includes a first corner seal, the first corner seal being disposed at a first corner position corresponding to the battery cell in the second packaging section.

12. The battery according to claim 11, characterized in that, The corner located at the first end of the battery cell and near the common sealing edge is designated as the second corner position. The first packaging part includes a second corner seal, and the second corner seal is provided corresponding to the second corner position of the battery cell in the first packaging part; and / or, the second packaging part includes a second corner seal, and the second corner seal is provided corresponding to the second corner position of the battery cell in the second packaging part.

13. The battery according to claim 12, characterized in that, The two corners away from the common sealing edge are designated as the third corners. The first packaging part includes a third corner seal, which corresponds to the third corner of the battery cell in the first packaging part; and / or, the second packaging part includes a third corner seal, which corresponds to the third corner of the battery cell in the second packaging part.

14. A battery module, characterized in that, Includes the battery as described in any one of claims 1 to 13.

15. The battery module according to claim 14, characterized in that, The battery module includes at least two batteries, which are grouped in pairs, with the common sealing edges of the batteries in the same group facing each other.

16. The battery module according to claim 15, characterized in that, Two cells in the same battery are connected in series, and two batteries in the same group are connected in series, wherein the positive and negative tabs of each cell are positioned in the same way; Alternatively, two cells in the same battery may be connected in parallel, or two batteries in the same group may be connected in parallel, wherein the positive and negative tabs of the two cells in the same battery are arranged in opposite positions. Alternatively, two cells in the same battery may be connected in parallel, or two batteries in the same group may be connected in series, wherein the positive and negative tabs of the two cells in the same battery are arranged in opposite positions.

17. The battery module according to claim 15, characterized in that, The common sealing edges of the batteries in the same group are connected to each other; Alternatively, the battery module may further include a frame, with each battery connected to the frame to define the relative positions of the batteries in the same group.

18. Electrical equipment, characterized in that, Includes the battery module as described in any one of claims 14 to 17.

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