Battery, battery pack, and vehicle

Abstract

The battery (100) includes a case (10) and a plurality of electrode body groups (20) sealed in the case (10), two adjacent electrode body groups (20) are connected in series, and each electrode body group (20) includes a sealing film (201) and at least one electrode body (202), and the electrode body (202) is located in a storage cavity surrounded by the sealing film (201), and the electrode body group (20) includes a first electrode (21) and a second electrode (22), and the first electrode (21) and The two electrodes (22) extend outside the sealing film (201), the first electrode (21) of one of the two adjacent electrode body groups (20) is electrically connected to the second electrode (22) of the other electrode body group (20), an insulating material is filled in the gap between the two adjacent electrode body groups (20) to form an insulating spacer (30) between the two adjacent electrode body groups (20), and the connection portion of the two adjacent electrode body groups (20) is located within the insulating spacer (30).

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims priority to Chinese Patent Application No. "202020848060.X" with the title of invention "Battery, Battery Pack and Automobile" filed by VIEWD Technology Company Limited on May 18, 2020.

[0002] This application relates to the field of batteries, and specifically to batteries, battery packs and automobiles.

Background Art

[0003] In the prior art, in order to increase the capacity of a battery, a plurality of electrode bodies are connected in series in the battery case. During the use of the battery, the connection parts between the electrode bodies are prone to torsion, breakage, etc. Also, when vibration or shaking occurs, the plurality of electrode bodies are likely to move in the case, relative displacement occurs between the electrode bodies, and damage is caused to the electrode bodies. For example, the current collector is damaged, wrinkles occur in the separator, and the active material layer of the electrode plate falls off. Therefore, the stability of the battery is low, and safety problems are also likely to occur.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This application aims to solve at least one of the technical problems in the prior art. For this purpose, this application provides a battery with higher connection reliability between electrode body groups.

Means for Solving the Problems

[0005] The battery includes a case and a plurality of electrode body groups sealed within the case. Two adjacent electrode body groups are connected in series. The electrode body group includes a sealing film and at least one electrode body. The electrode body is located within an accommodation cavity surrounded by the sealing film. The electrode body group includes a first electrode and a second electrode for drawing current. The first electrode and the second electrode extend outside the sealing film. The first electrode of one of two adjacent electrode body groups is electrically connected to the second electrode of the other electrode body group. An insulating material is filled in the gap between two adjacent electrode body groups so as to form an insulating spacer between the two adjacent electrode body groups. The connection part between two adjacent electrode body groups is located within the insulating spacer.

[0006] Thereby, by installing an insulating spacer between two adjacent electrode body groups and installing the connection part between the two electrode body groups within the insulating spacer, the insulating spacer can better fix each electrode body group, prevent the movement of the electrode body group, maintain a reliable connection between the electrode body groups, and further enhance the strength of the connection part. Therefore, during the use of the battery, situations such as twisting and breaking at the connection part between two adjacent electrode body groups can be prevented, and the stability of the connection between the electrode body groups can be improved.

[0007] The battery pack includes the above battery.

[0008] The vehicle includes the above battery pack.

Advantages of the Invention

[0009] Some of the additional aspects and advantages of the present application are shown in the following description, some will become apparent in the following description, or will be understood by implementing the present application.

Brief Description of the Drawings

[0010] The above and / or additional aspects and advantages of the present application will become apparent and be more easily understood by describing the embodiments with reference to the following drawings.

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present application will be described in detail. Examples of the above embodiments are shown in the drawings, and throughout the drawings, the same or similar reference numerals indicate the same or similar components, or components having the same or similar functions. Hereinafter, the embodiments described with reference to the drawings are exemplary only and should be understood as merely interpreting the present application and not limiting the present application.

[0013] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is merely for facilitating the description of the present application and simplifying the description, and does not indicate or imply that the indicated device or component must have a specific orientation and be configured and operate in a specific orientation. Therefore, it should not be understood that the present application is limited thereby.

[0014] Note that the terms "first" and "second" are merely for the purpose of description, and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined by "first" and "second" may explicitly or implicitly include one or more of such features. Further, in the description of the present application, unless otherwise specifically described, "a plurality" means two or more.

[0015] The battery 100 according to the present application includes a case 10 and a plurality of electrode body groups 20 sealed within the case 10. Two adjacent electrode body groups 20 are connected in series. The electrode body group 20 includes a sealing film 201 and at least one electrode body 202. The electrode body 202 is located within an accommodation cavity surrounded by the sealing film 201. The electrode body group 20 includes a first electrode 21 and a second electrode 22 for drawing current. The first electrode 21 and the second electrode 22 extend outside the sealing film 201. The first electrode 21 of one of the two adjacent electrode body groups 20 is electrically connected to the second electrode 22 of the other electrode body group 20. An insulating material is filled in the gap between two adjacent electrode body groups 20 so as to form an insulating spacer 30 between the two adjacent electrode body groups 20, and the connection portion of the two adjacent electrode body groups 20 is located within the insulating spacer 30.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows.

[0017] In this application, an insulating spacer 30 is installed between two adjacent electrode body groups 20, and the connection part of the two electrode body groups 20 is installed within the insulating spacer 30. By doing so, the insulating spacer 30 can better fix each electrode body group 20, prevent the movement of the electrode body group 20, maintain a reliable connection between the electrode body groups 20, and further enhance the strength of the connection part. Therefore, during the use of the battery 100, situations such as torsion and breakage at the connection part between two adjacent electrode body groups 20 can be prevented, and the stability of the connection between the electrode body groups 20 can be improved.

[0018] Referring to FIGS. 1 and 2, the battery 100 includes a case 10 and a plurality of electrode body groups 20 sealed within the case 10. Two adjacent electrode body groups 20 are connected in series. Referring to FIGS. 3 and 4, the electrode body group 20 includes a sealing film 201 and at least one electrode body 202, and the electrode body 202 is located within a housing cavity surrounded by the sealing film 201. In some examples of this application, the sealing film 201 is an aluminum-plastic composite film or a polymer material composite film. The electrode body group 20 includes a first electrode 21 and a second electrode 22 for drawing current. Among the first electrode 21 and the second electrode 22, one is a positive electrode and the other is a negative electrode. The first electrode 21 and the second electrode 22 extend outside the sealing film 201. The first electrode 21 of one of the two adjacent electrode body groups 20 is electrically connected to the second electrode 22 of the other electrode body group 20. An insulating material is filled in the gap between two adjacent electrode body groups 20 so as to form an insulating spacer 30 therebetween, and the connection part of the two adjacent electrode body groups 20 is located within the insulating spacer 30.

[0019] In some examples of the present application, the length of the battery 100 extends along the first direction L, and the thickness of the electrode body group 20 extends along the second direction W perpendicular to the first direction L. The length of the electrode body group 20 extends along the first direction L, and the plurality of electrode body groups 20 are arranged along the first direction L. Also, the first electrode 21 and the second electrode 22 of the electrode body group 20 are installed at opposite ends along the first direction L of the electrode body group 20 and are connected in series. The two electrode body groups 20 connected in series are two adjacent electrode body groups 20. That is, in the embodiment of the present application, two adjacent electrode body groups 20 are connected in series. Thereby, a "head-to-head" arrangement method can be used for the plurality of electrode body groups 20, and it can be easily realized that the electrode body groups 20 are connected in series two by two in this arrangement method, and the connection structure is simple. Also, with this arrangement method, a long battery 100 can be easily manufactured. Thereby, when the battery 100 is installed in the case of the battery pack 200, the battery 100 can be directly installed in the case of the battery pack 200 by serving as a support with the case 10 of the battery 100 itself without installing a support structure such as a lateral beam and a longitudinal beam. Thereby, the internal space of the battery pack 200 can be saved, the volume utilization rate of the battery pack 200 can be improved, the energy density of the battery pack 200 can be improved, and it is helpful for reducing the weight of the battery pack 200.

[0020] In some examples of the present application, the plurality of electrode body groups 20 can form two electrode body rows. That is, the battery 100 may include two electrode body rows, and the two electrode body rows may be connected in series. For example, the connection method of the two electrode body rows may be to be connected in a "U" shape. That is, the corresponding electrodes located at the same end of the first direction L of the two electrode body rows are connected in series, and the corresponding electrodes located at the other end of the first direction L of the two electrode body rows are the positive electrode and the negative electrode of the battery, respectively.

[0021] Each electrode body row includes a plurality of electrode body groups 20. The two electrode body rows are arranged along the second direction W. The plurality of electrode body groups 20 in each electrode body row are arranged along the first direction L. Also, the first electrode 21 and the second electrode 22 of the electrode body group 20 are installed at opposite ends along the first direction L of the electrode body group 20. Two serially connected electrode body groups 20 are two adjacent electrode body groups 20. That is, in the embodiment of the present application, in the plurality of electrode body groups 20 of each electrode body row, since two adjacent electrode body groups 20 are serially connected, the "head-to-head" arrangement method is used for the plurality of electrode body groups 20 of each electrode body row. With this arrangement method, it can be easily realized that the electrode body groups 20 are serially connected two by two, and the connection structure is simple.

[0022] Naturally, in other embodiments, only one electrode body row may be installed in the battery 100. That is, in the battery 100, all the electrode body groups 20 are arranged in sequence along the first direction L and are serially connected to form one electrode body row.

[0023] When a plurality of electrode body groups 20 are connected in series, the connection part between the electrode body groups 20 becomes a vulnerable part of the entire battery 100, and torsion or breakage is likely to occur during the use of the battery 100, so the connection becomes invalid. Also, since a plurality of electrode body groups 20 are connected in series in the battery 100, the risk of the battery moving in the first direction L is increased. Therefore, in the present application, an insulating spacer 30 manufactured by filling an insulating material in the gap between two adjacent electrode body groups 20 is installed between two serially connected electrode body groups 20. The insulating spacer 30 can adhere to two adjacent electrode body groups 20 so that the connection between the insulating spacer 30 and the two adjacent electrode body groups 20 is more stable and reliable. By installing the connection part of the two serially connected electrode body groups 20 within the insulating spacer 30, the strength of the connection part between the first electrode 21 and the second electrode 22 can be increased. Therefore, the insulating spacer 30 can better fix each electrode body group 20, prevent the movement of the electrode body group 20, maintain the effectiveness of the connection between the electrode body groups 20 and fix the electrode body groups, and further increase the strength of the connection part. This can prevent situations such as torsion and breakage from occurring at the connection part between the electrode body groups 20 during the use of the battery, and improve the reliability of the connection between the electrode body groups 20.

[0024] In some embodiments of the present application, the two serially connected electrode body groups 20 are two adjacent electrode body groups 20, and the insulating spacer 30 is located between the two adjacent electrode body groups 20.

[0025] Thereby, insulating spacers 30 are installed between any two adjacent electrode body groups 20. The insulating spacer 30 can separate two adjacent electrode body groups 20. The insulating spacer 30 and the case 10 are positioned relative to each other, which helps to further prevent the electrode body group 20 from moving in its first direction L.

[0026] In some embodiments of the present application, when the battery 100 includes two electrode body arrays, that is, when two electrode body groups 20 are installed on both sides of the insulating spacer 30 in the first direction L, the capacitance of the battery 100 can be increased by increasing the number of the electrode body groups 20.

[0027] In some other embodiments of the present application, only one electrode body group 20 is installed in the second direction W, and the plurality of electrode body groups 20 all extend along the first direction L, that is, only one electrode body group 20 is installed on each side of the insulating spacer 30 in the first direction L. In this case, it may be understood that only one electrode body array is installed in the battery 100.

[0028] In one embodiment of the present application, the case 10 is a metal case such as an aluminum case. Of course, the case may be made of other metals as required. Thereby, the case 10 has sufficient strength, avoids being crushed or deformed, and improves the safety of the battery 100.

[0029] In some embodiments of the present application, the sealing film 201 is an aluminum-plastic composite film or a polymer material composite film. The first electrode 21 and the second electrode 22 of the electrode body group 20 extend out of the sealing film 201. That is, in the embodiment of the present application, the insulating spacer 30 is the insulating spacer 30 installed outside the sealing film 201. By installing the insulating spacer 30 outside the sealing film, the reliability of the connection between the electrode body groups 20 is improved.

[0030] In some embodiments of the present application, the mentioned electrode body may be understood as a general electrode body in the field of power batteries. The electrode body and the electrode body group 20 are components inside the case 10 of the battery 100 and should not be understood as the battery itself. The electrode body may be a wound electrode body and generally refers to an assembly that is not completely sealed. Therefore, since the battery 100 mentioned in the present application includes a plurality of electrode bodies, it should not be simply understood as a battery module or a battery pack. In the present application, the electrode body group 20 may be composed of one single electrode body or may include a plurality of electrode bodies. The plurality of electrode bodies are connected in parallel to form the electrode body group 20.

[0031] Referring to FIG. 5 together, in the first embodiment of the present application, the spacer ring 30 includes an outer peripheral surface 302 facing the inner surface of the case 10, and at least one first positioning portion 304 is formed on the outer peripheral surface 302 of the spacer ring 30. On the inner surface 101 of the case 10, a second positioning portion 102 corresponding one-to-one to the first positioning portion 304 is formed. The first positioning portion 304 and the corresponding second positioning portion 102 are engaged to fix the spacer ring 30 and the case 10.

[0032] Thereby, by engaging the first positioning portion 304 of the spacer ring 30 and the second positioning portion 102 of the case 10 with each other to fix the spacer ring 30 and the case 10, the movement of the electrode body group 20 can be further prevented, and the movement prevention effect can be improved.

[0033] In some embodiments of the present application, referring to FIG. 5, the first positioning portion 304 is a groove formed by the outer peripheral surface 302 of the insulating spacer 30 being recessed into the inside of the insulating spacer 30, and the second positioning portion 102 is a protrusion formed on the inner surface 101 of the case 10. The protrusion is fitted into the groove to fix the insulating spacer 30 and the case 10.

[0034] In this way, by directly forming grooves on the insulating spacer 30 and directly forming protrusions on the case 10 so that the protrusions of the case 10 engage with the grooves of the insulating spacer 30 to achieve fixation and positioning between the insulating spacer 30 and the case 10, not only can the movement of the electrode body group 20 be further prevented, but also the space occupied by the battery 100 can be saved.

[0035] As shown in FIG. 5, the insulating spacer 30 may be connected to the surface with the largest area of the case 10 (also referred to as the "large surface"). Specifically, the thickness of the battery 100 extends along a second direction W that is perpendicular to the first direction L. The case 10 of each battery 100 includes first side surfaces 11 and second side surfaces 12 on both sides facing each other in the second direction W, and the first side surfaces 11 and the second side surfaces 12 are the largest surfaces of the battery 100. Second positioning portions 102 are installed on both the first side surface 11 and the second side surface 12 of the case 10. First positioning portions 304 are installed on the inner peripheral surfaces corresponding to the first side surface 11 and the second side surface 12 of the insulating spacer 30. The first positioning portions 304 and the second positioning portions 102 correspond to each other one-to-one and engage to achieve the fixation of the insulating spacer 30 and the case 10.

[0036] In some other embodiments of the present application, referring to FIG. 6, the first positioning portion 304 may be a protrusion formed on the outer peripheral surface 302 of the insulating spacer 30, and the second positioning portion 102 may be a groove formed on the inner surface 101 of the case 10. The protrusion is fitted into the groove to fix the insulating spacer 30 and the case 10.

[0037] In this way, by directly forming protrusions on the insulating spacer 30 and directly forming grooves on the inner surface 101 of the case 10 so that the grooves of the case 10 engage with the protrusions of the insulating spacer 30 to achieve fixation and positioning between the insulating spacer 30 and the case 10, not only can the movement of the electrode body group 20 be further prevented, but also the space occupied by the battery 100 can be saved.

[0038] In some embodiments of the present application, referring to FIG. 7, the second positioning portion 102 on the first side surface 11 is a protrusion formed on the inner surface 101 of the case 10, and the first positioning portion 304 is a groove formed on the outer peripheral surface 302 of the insulating spacer 30 corresponding to the protrusion, and the protrusion and the groove engage with each other. The second positioning portion 102 on the second side surface 12 is a groove formed on the inner surface 101 of the case 10, and the first positioning portion 304 is a protrusion installed on the outer peripheral surface 302 of the insulating spacer 30 corresponding to the protrusion, and the protrusion and the groove engage with each other.

[0039] Thereby, in the case 10 of the battery 100, the second positioning portion 102 on the first side surface 11 is a protrusion, the corresponding first positioning portion 304 is a groove, the second positioning portion 102 on the second side surface 12 is a groove, and the corresponding first positioning portion 304 is a protrusion. The protrusion and the groove engage with each other to not only realize the fixation and positioning between the insulating spacer 30 and the case 10, but also realize the fixation and positioning between the case 10 and the case 10, further prevent the movement of the electrode body group 20, and prevent the mutual movement of the cases 10 of adjacent batteries 100.

[0040] Referring to FIG. 8, in the second embodiment of the present application, the insulating spacer 30 includes an outer peripheral surface 302 facing the inner surface of the case 10, the case 10 includes an inner surface 101 facing the insulating spacer 30, and a first adhesive layer 40 is installed between the outer peripheral surface 302 of the insulating spacer 30 and the inner surface of the case 10 to fix the insulating spacer 30 and the case 10.

[0041] Thereby, by installing the first adhesive layer 40 between the outer peripheral surface 302 of the insulating spacer 30 and the inner surface of the case 10 to fix the insulating spacer 30 and the case 10, the movement of the electrode body group 20 can be further prevented, and the anti-movement effect can be improved.

[0042] In some examples of the present application, the first adhesive layer 40 is a heat-sensitive adhesive. After the electrode body group 20 is assembled in the case 10 and when the first adhesive layer 40 is heated to a predetermined temperature, the first adhesive layer 40 has adhesiveness and fixes the insulating spacer 30 and the case 10. Note that before the electrode body group 20 is assembled in the case 10, the first adhesive layer 40 has no adhesiveness. After the electrode body group 20 is assembled in the case 10, by heating the first adhesive layer 40, since the first adhesive layer 40 has adhesiveness by heating, the insulating spacer 30 and the case 10 are fixed. Thereby, not only the purpose of fixing the insulating spacer 30 and the case 10 is achieved, but also it is easy to attach.

[0043] In some other embodiments of the present application, the first adhesive layer 40 is a pressure-sensitive adhesive. Before the electrode body group 20 is assembled in the case 10, the first adhesive layer 40 has no adhesiveness. After the electrode body group 20 is assembled in the case 10 and when the first adhesive layer 40 is pressed by a predetermined pressure, the first adhesive layer 40 has adhesiveness and fixes the insulating spacer 30 and the case 10. Thereby, not only the purpose of fixing the insulating spacer 30 and the case 10 is achieved, but also it is easy to attach.

[0044] Naturally, in other embodiments, the first adhesive layer 40 may be other types of adhesives such as double-sided tape, and is not limited here.

[0045] It should be understood that the first adhesive layer 40 is not limited here and may be installed on all surfaces of the outer peripheral surface 302 of the insulating spacer 30, or may be installed on some surfaces of the outer peripheral surface 302 of the insulating spacer 30.

[0046] In some examples of the present application, a second adhesive layer 50 is installed between the outer surface of the electrode body group 20 and the inner surface 101 of the case 10 so as to fix the electrode body group 20 and the case 10.

[0047] Thus, by fixing the electrode body group 20 and the case 10 with the second adhesive layer 50, the fixation of the electrode body group 20 becomes more stable, and the movement of the electrode body group 20 can be further avoided.

[0048] In some examples of the present application, the second adhesive layer 50 is a heat-sensitive adhesive or a pressure-sensitive adhesive.

[0049] In some examples of the present application, the second adhesive layer 50 is a heat-sensitive adhesive. When the electrode body group 20 is assembled in the case 10 and the second adhesive layer 50 is heated at a predetermined temperature, the second adhesive layer 50 has adhesiveness and fixes the electrode body group 20 and the case 10. Before the electrode body group 20 is assembled in the case 10, the second adhesive layer 50 has no adhesiveness. After the electrode body group 20 is assembled in the case 10, by heating the second adhesive layer 50, the first adhesive layer 50 has adhesiveness by heating, so that the electrode body group 20 and the case 10 are fixed. Thereby, not only the purpose of fixing the electrode body group 20 and the case 10 is achieved, but also it is easy to attach.

[0050] In some other embodiments of the present application, the second adhesive layer 50 is a pressure-sensitive adhesive. Before the electrode body group 20 is assembled in the case 10, the second adhesive layer 50 has no adhesiveness. After the electrode body group 20 is assembled in the case 10 and the second adhesive layer 50 is pressed by a predetermined pressure, the second adhesive layer 50 has adhesiveness and fixes the electrode body group 20 and the case 10. Thereby, not only the purpose of fixing the electrode body group 20 and the case 10 is achieved, but also it is easy to attach.

[0051] Naturally, in other embodiments, the second adhesive layer 50 may be other types of adhesives such as double-sided tape, and is not limited here.

[0052] In one embodiment, the second adhesive layer 50 is disposed on the large surface of the outer surface of the encapsulation film 201 of the electrode body group 20, and the large surface refers to one or two outer surfaces with a large area among the outer surfaces of the encapsulation film 201 of the electrode body group 20. In other embodiments, the second adhesive layer 50 may be disposed on any surface of the outer surface of the encapsulation film 201 of the electrode body group 20, and is not limited herein.

[0053] In the third embodiment of the present application, referring to FIG. 9, the case 10 is a metal case, the insulating spacer 30 includes an outer peripheral surface 302 facing the inner surface 101 of the case 10, a metal component 303 is disposed on the outer peripheral surface 302 of the insulating spacer 30, and the metal component 303 and the case 10 are connected to fix the insulating spacer 30 and the case 10.

[0054] Thus, in the present application, the insulating spacer 30 includes an outer peripheral surface 302 facing the inner surface 101 of the case 10, a metal component 303 is disposed on the outer peripheral surface 302 of the insulating spacer 30, and the metal component 303 and the case 10 are connected to fix the insulating spacer 30 and the case 10, further preventing the movement of the electrode body group 20 and improving the anti-movement effect.

[0055] In some embodiments of the present application, referring to FIG. 10, in order to facilitate the fixing of the metal component 303 and the insulating spacer 30, a locking groove 3021 is disposed on the outer peripheral surface 302 of the insulating spacer 30. The metal component 303 includes an engaging portion 3031 and a connecting portion 3032 connected to the engaging portion 3031. The engaging portion 3031 is engaged in the locking groove 3021, and the connecting portion 3032 is exposed on the outer peripheral surface 302 and connected to the case 10.

[0056] Thereby, the snap-fit engagement between the locking groove 3021 and the engaging portion 3031 improves the connection stability between the insulating spacer 30 and the metal component 303.

[0057] In some embodiments of the present application, the engaging portion 3031 is a plurality of engaging pieces 3033 that extend vertically from the periphery of the connecting portion 3032, and there are gaps between the engaging pieces 3033. For example, in this embodiment, there are six engaging pieces 3033, and there is a gap between every two engaging pieces 3033. Similarly, inside the locking groove 3021, engaging grooves 3022 corresponding to each engaging piece 3033 are installed. For example, in this embodiment, six engaging grooves 3022 may be installed inside the locking groove 3021, and the six engaging grooves 3022 are installed in close contact with the side wall of the locking groove 3021. Each engaging piece 3033 is inserted corresponding to one engaging groove 3022.

[0058] Thereby, the engaging piece 3033 makes the compatibility of the engaging portion 3031 high and facilitates engagement with the corresponding engaging groove 3022.

[0059] In some embodiments of the present application, the metal part 303 has a groove structure, the shape of the locking groove 3021 conforms to the open shape of the groove structure, the side wall of the groove structure is locked in the locking groove 3021 as the engaging portion 3031, and the bottom wall of the groove, which is the groove structure, is connected to the case 10 as the connecting portion 3032.

[0060] Thereby, the space occupied by the metal part 303 is reduced, and the overall structure of the battery 100 becomes more compact.

[0061] In some embodiments of the present application, the locking groove 3021 and the engaging portion 3031 are fixed to each other by interference fit.

[0062] Thereby, the snap-fit engagement between the locking groove 3021 and the engaging portion 3031 improves the connection stability between the insulating spacer 30 and the metal part 303.

[0063] In some embodiments of the present application, the metal part 303 is integrally formed with the insulating spacer 30 by insert molding, and the metal part is made of an aluminum material.

[0064] This reduces the process of attaching the metal part 303 and improves the stability of the connection between the metal part 303 and the insulating spacer 30.

[0065] In some embodiments of the present application, the metal part 303 and the case 10 are fixed by welding such as laser welding. As shown in FIG. 9, a laser welding seam 40 is formed between the metal part 303 and the case 10.

[0066] This improves the stability of the connection between the metal part 303 and the case 10, prevents the movement of the electrode body group 20 in the first direction L, maintains the effectiveness of the connection between the electrode body groups 20, increases the mechanical strength of the battery 100, and prevents situations such as twisting and breaking from occurring during the use of the battery 100.

[0067] Referring to FIG. 9, when the battery 100 includes two electrode body rows, that is, when there are two electrode body groups 20 on both sides of the insulating spacer 30 in the first direction L, the insulating spacer 30 includes a first insulating portion 311, a second insulating portion 312, and a third insulating portion 313 that are sequentially installed along the second direction W. The second insulating portion 312 is located between the first insulating portion 311 and the third insulating portion 313. Locking grooves 3021 are respectively installed outside the first insulating portion 311 and the third insulating portion 313. A through hole 301 through which the connection part of one electrode body row penetrates is formed between the first insulating portion 311 and the second insulating portion 312, and another through hole (not shown) through which the connection part of the other electrode body row penetrates is formed between the second insulating portion 312 and the third insulating portion 313.

[0068] In some embodiments of the present application, the battery 100 is substantially a rectangular parallelepiped. The battery 100 has a length L, a thickness W, and a height H, where the length L is greater than the height H, and the height H is greater than the thickness W. The length of the battery 100 is 400 - 2500 mm. The ratio of the length to the height of the battery 100 is 4 - 21.

[0069] Note that the battery 100 being substantially rectangular parallelepiped means that the battery 100 may be rectangular parallelepiped-shaped or cubic-shaped, with irregularities localized, but may also be substantially rectangular parallelepiped-shaped or substantially cubic-shaped, or have notches, protrusions, chamfers, radians, or bends localized, but is understood to be substantially rectangular parallelepiped-shaped or substantially cubic-shaped as a whole.

[0070] The battery pack according to the present application includes a plurality of the batteries 100 or battery modules according to the present application. Referring to FIG. 11, the battery pack 200 according to the present disclosure includes a tray 22 and the battery 100 disposed on the tray 22.

[0071] The vehicle 1000 according to the present application includes the battery pack 200 according to the present application.

[0072] Referring to FIG. 12, the vehicle according to the present application includes the battery pack 200.

[0073] Although the embodiments of the present application have been shown and described, those skilled in the art can make various changes, modifications, substitutions, and variations to these embodiments without departing from the principle and spirit of the present application. It can be understood that the scope of the present application is limited by the claims and their equivalents.

Description of Reference Numerals

[0074] 100 Battery 10 Case 20 Electrode Body Group 30 Insulating Spacer 21 Electrode 22 Tray 201 Sealing Film 202 Electrode Body 11 First Side 12 Second Side 302 Outer Peripheral Surface 304 First Positioning Portion 102 Second Positioning Portion 101 Inner Surface 40 First Adhesive Layer 50 Second Adhesive Layer 303 Metal Part 311 First Insulating Portion 312 Second insulating part 313 Third insulating part 3033 Engaging piece 3021 Locking groove 3032 Connecting part 3031 Engaging part 3022 Engaging groove 200 Battery pack 1000 Automobile

Claims

**Claim 1**: A battery including a case and a plurality of electrode body groups sealed within the case, wherein two adjacent electrode body groups are connected in series. Each electrode body group includes a sealing film and at least one electrode body, and the electrode body is located within a receiving cavity surrounded by the sealing film. Each electrode body group includes a first electrode and a second electrode for drawing current, and the first electrode and the second electrode extend outside the sealing film. The first electrode of one of the two electrode body groups is connected to the second electrode of the other electrode body group. The gap between two adjacent electrode body groups is filled with an insulating material to form an insulating spacer between the two adjacent electrode body groups. The connection site between two adjacent electrode body groups is located within the insulating spacer, and the insulating spacer fixes the two adjacent electrode body groups to prevent movement of the two adjacent electrode body groups. The insulating spacer includes an outer peripheral surface facing the inner surface of the case. The case includes an inner surface facing the insulating spacer, and a first adhesive layer is provided between the outer peripheral surface of the insulating spacer and the inner surface of the case to fix the insulating spacer to the case, and / or a second adhesive layer is provided between the outer surface of the electrode body group and the inner surface of the case to fix the electrode body group to the case. The first adhesive layer and / or the second adhesive layer is a heat-sensitive adhesive or a pressure-sensitive adhesive. A battery characterized by the above. **Claim 2**: A battery including a case and a plurality of electrode body groups sealed within the case, wherein two adjacent electrode body groups are connected in series. Each electrode body group includes a sealing film and at least one electrode body, and the electrode body is located within a receiving cavity surrounded by the sealing film. Each electrode body group includes a first electrode and a second electrode for drawing current, and the first electrode and the second electrode extend outside the sealing film. The first electrode of one of the two electrode body groups is connected to the second electrode of the other electrode body group. The gap between two adjacent electrode body groups is filled with an insulating material to form an insulating spacer between the two adjacent electrode body groups. The connection site between two adjacent electrode body groups is located within the insulating spacer, and the insulating spacer fixes the two adjacent electrode body groups to prevent movement of the two adjacent electrode body groups. The insulating spacer includes an outer peripheral surface facing the inner surface of the case, a metal component is installed on the outer peripheral surface of the insulating spacer, and the metal component is connected to the case to fix the insulating spacer to the case. A battery characterized by this.

3. A locking groove is installed on the outer peripheral surface of the insulating spacer. The metal component includes an engaging portion and a connecting portion connected to the engaging portion. The engaging portion is engaged in the locking groove, and the connecting portion is exposed on the outer peripheral surface of the insulating spacer and connected to the case. The metal component has a groove structure. The shape of the locking groove conforms to the shape of the opening of the groove structure. The side wall of the groove structure is locked in the locking groove as the engaging portion, and the bottom wall of the groove structure is connected to the case as the connecting portion. The battery according to claim 2, characterized by this.

4. The metal component is integrally formed with the insulating spacer. The metal component is made of an aluminum material, and the metal component is fixed to the case by welding. The battery according to claim 2, characterized by this.

5. The length of the battery extends along a first direction, the length of the electrode body group extends along the first direction, and a plurality of the electrode body groups are arranged along the first direction. The battery according to any one of claims 1 to 4, characterized by this.

6. A battery pack characterized by including a plurality of the batteries according to any one of claims 1 to 5.

7. An automobile characterized by including the battery pack according to claim 6.

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