Batteries, battery packs and automobiles

Abstract

The present application provides a battery, a battery pack, and a vehicle. The battery includes a case and a plurality of electrode body assemblies sealed within the case. The electrode body assembly includes a sealing film and at least one electrode body positioned in an accommodating cavity formed by the sealing film. A spacer is installed between two electrode body assemblies connected in series. The electrode body assemblies include first and second electrodes, which extend outside the sealing film. The first electrode of one of the two electrode body assemblies connected in series is connected to the second electrode of the other electrode body assembly. The connection portions of the corresponding connected first and second electrodes are accommodated in through holes. The spacer has an outer circumferential surface facing the inner surface of the case. At least one first positioning portion is formed on the outer circumferential surface of the spacer. A second positioning portion is formed on the inner surface of the case. The first positioning portion and the corresponding second positioning portion engage with each other to fix the spacer and the case.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from Chinese Patent Application No. "202010421323.3" filed by BD Company Limited on May 18, 2020, for the invention "Battery, Battery Pack and Automobile."

[0002] This application relates to the field of batteries, and in particular to batteries, battery packs and automobiles. [Background technology]

[0003] In conventional technology, in order to increase the capacity of a battery, multiple electrode bodies are connected in series inside the battery case, and twisting, bending, etc. easily occur at the connection points between the electrode bodies during use of the battery. Furthermore, when vibration or shaking occurs, the multiple electrode bodies are likely to move inside the case, causing relative displacement between the electrode bodies and damaging the electrode bodies. For example, the current collectors may break, the separator may wrinkle, and the active material layer of the electrode plate may fall off, resulting in low battery stability and a high likelihood of safety issues. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems in the prior art.

[0005] In order to solve the above technical problems, the present application uses the following technical means.

[0006] A battery according to a first aspect of the present application includes a case and a plurality of electrode body assemblies sealed in the case, the electrode body assemblies being connected in series and including a sealing film and at least one electrode body positioned in a receiving cavity formed by being surrounded by the sealing film, a spacer being installed between the two electrode body assemblies connected in series, a through-hole being installed in the spacer, the electrode body assemblies including a first electrode and a second electrode, the first electrode and the second electrode extending outside the sealing film, and the two electrode bodies connected in series. The first electrode of one electrode assembly of the assemblies is connected to the second electrode of the other electrode assembly, and the connection portion of the correspondingly connected first and second electrodes is accommodated in the through hole, the spacer has an outer peripheral surface facing the inner surface of the case, at least one first positioning portion is formed on the outer peripheral surface of the spacer, and second positioning portions corresponding one-to-one to the first positioning portion are formed on the inner surface of the case, and the first positioning portion and the corresponding second positioning portion engage to fix the spacer and the case.

[0007] Preferably, the first positioning portion is a groove formed by recessing the outer surface of the spacer into the interior of the spacer, and the second positioning portion is a protrusion formed on the inner surface of the case, and the protrusion is fitted into the groove.

[0008] Preferably, the first positioning portion is a protrusion formed on the outer peripheral surface of the spacer, and the second positioning portion is a groove formed on the inner surface of the case, and the protrusion is fitted into the groove.

[0009] Preferably, the two electrode assemblies connected in series are two adjacent electrode assemblies, and the spacer is located between the two adjacent electrode assemblies.

[0010] Preferably, the spacer includes a first insert and a second insert, the first insert and the second insert being located on either side of the connection portion of the correspondingly connected first electrode and second electrode, and together sandwiching the connection portion, and the gap between the first insert and the second insert constitutes the through hole.

[0011] Preferably, the first insert and the second insert are adhesively fixed to the electrode assembly.

[0012] Preferably, a plastic material is filled into the gap between two adjacent electrode assemblies to form the spacer between the two adjacent electrode assemblies.

[0013] Preferably, the outer surface of the electrode assembly is adhesively fixed to the inner surface of the case.

[0014] A battery pack according to a second aspect of the present application includes a plurality of the above batteries.

[0015] A vehicle according to a third aspect of the present application includes the battery pack.

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

[0017] In the present application, a spacer is installed between two electrode assemblies connected in series, and the connection portions of the two electrode assemblies connected in series are installed within the spacer. This allows the spacer to better secure each electrode assembly, prevent movement of the electrode assemblies, maintain the effectiveness of the connection between the electrode assemblies, secure the electrode assemblies, and further increase the strength of the connection portions, thereby preventing situations such as twisting and breakage from occurring at the connection portions between the electrode assemblies during use of the battery and improving the reliability of the connection between the electrode assemblies. In addition, by engaging the first positioning portion of the spacer with the second positioning portion of the case to fix the spacer and the case, movement of the electrode assemblies can be further prevented, improving the movement prevention effect. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram of a battery with the case removed in one embodiment of the present application. [Figure 2] FIG. 1 is a schematic diagram of one electrode assembly of a battery in one embodiment of the present application. [Figure 3] 1 is a schematic diagram of a battery according to an embodiment of the present invention; [Figure 4] 1 is an assembly diagram of the electrode assembly of the present invention when the electrode assembly and the spacer are engaged with each other. [Figure 5] 1 is a schematic diagram illustrating the configuration when the electrode assembly of the present invention is engaged with a spacer. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI of a battery according to an embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional view of another embodiment of FIG. 6. [Figure 8] FIG. 7 is a cross-sectional view of another embodiment of FIG. 6. [Figure 9] 1 is a schematic diagram of a battery pack according to an embodiment of the present invention; [Figure 10] 1 is a schematic configuration diagram of an automobile according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, the embodiments of the present application will be described in detail. Examples of the embodiments are shown in the drawings, and the same or similar reference numerals throughout indicate the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the drawings are merely illustrative and are intended to interpret the present application, but should not be understood as limiting the present application.

[0021] In the description of this application, orientations or positional relationships indicated by terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" are based on the orientations or positional relationships shown in the drawings and are intended merely to facilitate and simplify the description of this application, and do not indicate or suggest that the devices or components shown must have a particular orientation and be configured and operated in a particular orientation, and should not be understood as limiting this application.

[0022] Additionally, the terms "first" and "second" are for descriptive purposes only and should not be understood to denote or suggest relative importance or to imply the number of technical features depicted. Thus, a feature qualified with "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, "plurality" means two or more than two, unless expressly and specifically limited otherwise.

[0023] In this application, unless otherwise clearly specified or limited, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, a communication between two components, or an interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0024] The battery according to the present application includes a case and a plurality of electrode body assemblies sealed in the case, the electrode body assemblies being connected in series and including a sealing film and at least one electrode body positioned in a receiving cavity formed by being surrounded by the sealing film, a spacer being installed between the two electrode body assemblies connected in series, a through-hole being installed in the spacer, the electrode body assemblies including a first electrode and a second electrode, the first electrode and the second electrode extending outside the sealing film, and the two electrode body assemblies connected in series. The first electrode of one electrode assembly of the assemblies is connected to the second electrode of the other electrode assembly, and the connection portion of the correspondingly connected first and second electrodes is accommodated in the through hole, the spacer has an outer peripheral surface facing the inner surface of the case, at least one first positioning portion is formed on the outer peripheral surface of the spacer, and second positioning portions corresponding one-to-one to the first positioning portion are formed on the inner surface of the case, and the first positioning portion and the corresponding second positioning portion engage to fix the spacer and the case.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] In the present application, a spacer is installed between two electrode assemblies connected in series, and the connection portions of the two electrode assemblies connected in series are installed within the spacer. This allows the spacer to better secure each electrode assembly, prevent movement of the electrode assemblies, maintain the effectiveness of the connection between the electrode assemblies, secure the electrode assemblies, and further increase the strength of the connection portions, thereby preventing situations such as twisting and breakage from occurring at the connection portions between the electrode assemblies during use of the battery and improving the reliability of the connection between the electrode assemblies. In addition, by engaging the first positioning portion of the spacer with the second positioning portion of the case to fix the spacer and the case, movement of the electrode assemblies can be further prevented, improving the movement prevention effect.

[0027] FIG. 1 is a schematic diagram of a battery with the case removed according to one embodiment of the present application. FIG. 2 is a schematic diagram of an electrode assembly of the battery according to one embodiment of the present application. FIG. 3 is a schematic diagram of the battery according to the present application. As shown in FIGS. 1, 2, and 3, the battery 100 includes a case 10 and a plurality of electrode assembly assemblies 20 sealed within the case 10. The plurality of electrode assembly assemblies 20 are connected in series. The electrode assembly 20 includes a sealing film 201 and at least one electrode positioned in a receiving cavity formed by being surrounded by the sealing film 201. A spacer 30 is installed between the two series-connected electrode assembly assemblies 20. FIGS. 4 and 5 are schematic diagrams of the electrode assembly according to the present application and the spacer engaged with each other. As shown in FIGS. 4 and 5 , a through-hole 301 is formed in the spacer 30, and the electrode assembly 20 includes a first electrode 21 and a second electrode 22, one of which 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. Two electrode assembly assemblies 20 are connected in series, and the first electrode 21 of one electrode assembly 20 is connected to the second electrode 22 of the other electrode assembly 20, and the connection portion between the first electrode 21 and the second electrode 22 is accommodated in the through-hole 301. FIG. 6 is a cross-sectional view of the battery according to the present application taken along line VI-VI. As shown in FIG. 6 , the spacer 30 includes an outer peripheral surface 302 facing the inner surface of the case 10, and at least one first positioning portion 303 is formed on the outer peripheral surface 302 of the spacer 30. Second positioning portions 102 are formed on the inner surface 101 of the case 10, in one-to-one correspondence with the first positioning portions 303. The first positioning portions 303 and the corresponding second positioning portions 102 are engaged with each other to fix the spacer 30 and the case 10 together.

[0028] The connection portion between the electrode assemblies 20 refers to the connection portion where the first electrode 21 of one of the two electrode assemblies 20 is connected to the second electrode 22 of the other electrode assembly 20. Thus, by installing a spacer 30 between two electrode assemblies 20 connected in series and installing the connection portions of the two electrode assemblies 20 within the spacer 30, the spacer 30 can better secure each electrode assembly 20, prevent movement of the electrode assemblies 20, maintain the effectiveness of the connection between the electrode assemblies 20, secure the electrode assemblies, and further increase the strength of the connection portions, thereby preventing situations such as twisting and breakage from occurring at the connection portions between the electrode assemblies 20 during use of the battery and improving the reliability of the connection between the electrode assemblies 20. In addition, by engaging the first positioning portion 303 of the spacer 30 with the second positioning portion 102 of the case 10 to fix the spacer 30 and the case 10, movement of the electrode assemblies 20 can be further prevented, improving the movement prevention effect.

[0029] In some examples of the present application, the length of the battery 100 extends along a first direction L, the length of the electrode assembly 20 extends along the first direction L, and multiple electrode assembly assemblies 20 are arranged along the first direction L. The first electrode 21 and the second electrode 22 of each electrode assembly 20 are disposed at opposite ends of the electrode assembly 20 along the first direction L, and two electrode assembly assemblies 20 connected in series are two adjacent electrode assembly assemblies 20. That is, in the present application, two adjacent electrode assembly assemblies 20 are connected in series. Therefore, a "head-to-head" arrangement is used for multiple electrode assembly assemblies 20, and this arrangement can easily realize two electrode assembly assemblies 20 connected in series, simplifying the connection structure. This arrangement also makes it easy to manufacture long batteries 100. As a result, when the battery 100 is mounted in the battery pack case, the case 10 of the battery 100 itself serves as a support, and the battery 100 can be mounted directly to the battery pack case without the need for supporting structures such as horizontal and vertical beams. This reduces the internal space of the battery pack, improves the volume utilization rate of the battery pack, and helps reduce the weight of the battery pack.

[0030] When multiple electrode assemblies 20 are connected in series, the connection portions between the electrode assemblies 20 become weak points in the entire battery and are prone to twisting, breakage, etc. during use of the battery, making the connection invalid. Furthermore, since multiple electrode assemblies 20 are connected in series within the battery, there is an increased risk of the battery moving in the first direction L. Therefore, in the present application, a spacer 30 is installed between two electrode assemblies 20 connected in series, and the connection portions of the two electrode assemblies 20 are installed in the through-holes 301 of the spacer 30, thereby increasing the strength of the connection portions. Furthermore, the first positioning portion 303 of the spacer 30 and the second positioning portion 102 of the case 10 are engaged with each other to better fix each electrode assembly 20, preventing movement of the electrode assemblies 20 in the first direction L, maintaining the effectiveness of the connection between the electrode assemblies 20, increasing the mechanical strength of the battery 100, and preventing the battery 100 from twisting, breakage, etc. during use.

[0031] In some embodiments, the case 10 is a metal case, such as an aluminum case, and may of course be made of other metals if necessary, so that the case 10 has sufficient strength to avoid being crushed or deformed, thereby improving the safety of the battery 100.

[0032] In some embodiments, the sealing film 201 is an aluminum-plastic composite film or a polymer composite film. The first electrode 21 and the second electrode 22 of the electrode assembly 20 extend outside the sealing film 201. That is, in the embodiments of the present application, the spacer 30 is disposed outside the sealing film 201, and disposing the spacer 30 outside the sealing film improves the reliability of the connection between the electrode assemblies 20.

[0033] The electrode assembly referred to in this application may be understood as a general electrode assembly in the field of power batteries, and the electrode assembly and electrode assembly 20 are components inside the case 10 of the battery 100 and should not be understood as the battery itself; the electrode assembly may be an electrode assembly formed by winding and generally refers to an assembly that is not completely sealed. Therefore, the battery referred to in this application should not be simply understood as a battery module or assembled battery, since it includes multiple electrode assemblies. In this application, the electrode assembly 20 may be composed of one single electrode assembly, or may include multiple electrode assemblies, and the multiple electrode assemblies are connected in parallel to form the electrode assembly 20.

[0034] In some embodiments, the two electrode body assemblies 20 connected in series are two adjacent electrode body assemblies 20, and the spacer 30 is located between the two adjacent electrode body assemblies 20.

[0035] As a result, a spacer 30 is installed between each two adjacent electrode assemblies 20, and the spacer 30 can separate the two adjacent electrode assemblies 20, and the spacer 30 and the case 10 are positioned relative to each other, which helps to further prevent the electrode assemblies 20 from moving in their first direction L.

[0036] In some embodiments, as shown in FIG. 6 , the first positioning portion 303 is a groove formed by recessing the outer surface 302 of the spacer 30 into the spacer 30, and the second positioning portion 102 is a protrusion formed on the inner surface 101 of the case 10, and the protrusion is fitted into the groove to fix the spacer 30 and the case 10.

[0037] Thus, by directly forming grooves on the spacer 30 and directly forming protrusions on the case 10 so that the protrusions on the case 10 engage with the grooves on the spacer 30 to achieve fixation and positioning between the spacer 30 and the case 10, movement of the electrode assembly 20 can be further prevented and the space occupied by the battery 100 can be reduced.

[0038] As shown in FIG. 6 , the spacer 30 may be connected to the largest surface (also referred to as the “large surface”) of the case 10. Specifically, the thickness of the battery 100 extends along a second direction W perpendicular to the first direction L. The case 10 of each battery 100 includes a first side 11 and a second side 12 opposite each other in the second direction W, and the first side 11 and the second side 12 are the largest surfaces of the battery 100. Second positioning portions 102 are provided on both the first side 11 and the second side 12 of the case 10, and first positioning portions 303 are provided on the inner circumferential surfaces of the spacer 30 corresponding to the first side 11 and the second side 12. The first positioning portions 303 and the second positioning portions 102 are engaged with each other in a one-to-one correspondence to secure the spacer 30 to the case 10.

[0039] In some embodiments, as shown in FIG. 7, the first positioning portion 303 may be a protrusion formed on the outer surface 302 of the spacer 30, and the second positioning portion 102 may be a groove formed on the inner surface 101 of the case 10, and the protrusion is fitted into the groove to fix the spacer 30 and the case 10.

[0040] Thus, by directly forming protrusions on the spacer 30 and directly forming grooves on the inner surface 101 of the case 10 so that the grooves on the case 10 engage with the protrusions on the spacer 30 to achieve fixation and positioning between the spacer 30 and the case 10, movement of the electrode assembly 20 can be further prevented and the space occupied by the battery 100 can be reduced.

[0041] 8, in some embodiments, the second positioning portion 102 of the first side surface 11 is a protrusion formed on the inner surface 101 of the case 10, and the first positioning portion 303 is a groove formed on the outer surface 302 of the spacer 30 corresponding to the protrusion, and the protrusion and the groove engage with each other. The second positioning portion 102 of the second side surface 12 is a groove formed on the inner surface 101 of the case 10, and the first positioning portion 303 is a protrusion formed on the outer surface 302 of the spacer 30 corresponding to the protrusion, and the protrusion and the groove engage with each other.

[0042] As a result, in the case 10 of the battery 100, the second positioning portion 102 on the first side 11 is a protrusion, the corresponding first positioning portion 303 is a groove, the second positioning portion 102 on the second side 12 is a groove, and the corresponding first positioning portion 303 is a protrusion, and the protrusion and groove engage with each other to not only achieve fixation and positioning between the spacer 30 and the case 10, but also achieve fixation and positioning between the cases 10, which can further prevent movement of the electrode body assembly 20 and can also prevent relative movement of the cases 10 of adjacent batteries 100.

[0043] 4 and 5 , the spacer 30 is a separate spacer, which is pre-formed and then attached between the electrode assemblies 20. The spacer 30 includes a first insert 31 and a second insert 32. The first insert 31 and the second insert 32 are located on both sides of the connection portion between the correspondingly connected first electrode 21 and second electrode 22, respectively, and sandwich the connection portion together. The gap between the first insert 31 and the second insert 32 forms the through hole 301. That is, the first insert 31 and the second insert 32 are located on both sides of the connection portion between the electrode assemblies 20, and the first insert 31 and the second insert 32 abut and contact the connection portion, and sandwich the connection portion together, thereby fixing the connection portion to the spacer 30. The space occupied by the connection portion in the spacer 30 is the through hole 301 of the spacer 30.

[0044] The first insert 31 and the second insert 32 are pre-molded and assembled, and for example, when assembling, after connecting the electrode body assemblies 20, the first insert 31 and the second insert 32 may be fixed to both sides of the connection portion between the electrode body assemblies 20, respectively, so as to realize the assembly of the spacer 30 and the electrode body assemblies 20.

[0045] In some embodiments, the first insert 31 and the second insert 32 are adhesively fixed to the electrode assembly 20, i.e., an adhesive layer may be provided in the gap between the spacer 30 and the electrode assembly 20 to fix the spacer 30 and the electrode assembly 20 to each other. This helps to fix each electrode assembly 20, better prevents movement of the electrode assembly 20, ensures connection between the electrode assemblies 20, and improves the safety of the battery.

[0046] In some embodiments, the first insert 31 and the second insert 32 may be secured to each other by a snap fit, or may be adhesively secured to each other, or the first insert 31 and the second insert 32 may each be adhesively secured to the connection site between the electrode assemblies 20.

[0047] This allows the first insert 31 and the second insert 32 to be positioned relative to each other, which improves the engagement effect between the first insert 31 and the second insert 32 and is more convenient for assembling other components.

[0048] In some embodiments, a plastic material is filled into the gap between two adjacent electrode assemblies 20 so as to form the spacer 30 between the two adjacent electrode assemblies 20. That is, the spacer 30 may be formed by directly filling the space between the two adjacent electrode assemblies 20 after the two adjacent electrode assemblies 20 are connected so that the connection portions of the two adjacent electrode assemblies 20 are located within the spacer 30.

[0049] In some embodiments, the outer surface of the electrode assembly 20 is adhesively fixed to the inner surface 101 of the case 10. This further fixes the electrode assembly 20 and prevents movement of the electrode assembly 20.

[0050] In some embodiments, battery 100 is a substantially rectangular parallelepiped having a length L, a thickness W, and a height H, where length L is greater than height H, and height H is greater than thickness W. The length of battery 100 is 400 to 2500 mm. The ratio of length to height of battery 100 is 4 to 21.

[0051] It should be noted that when battery 100 is an approximately rectangular parallelepiped, it is understood that battery 100 may be rectangular or cubic, or may have localized irregularities but be approximately rectangular or cubic, or may have localized notches, protrusions, chamfers, curvatures, or bends but be approximately rectangular or cubic overall.

[0052] The battery module according to the present application includes a plurality of batteries 100 according to the present application.

[0053] The battery pack according to the present application includes a plurality of batteries 100 according to the present application or battery modules according to the present application.

[0054] As shown in FIG. 9, a battery pack 200 according to the present application includes a tray 22 and a battery 100 arranged in the tray 22.

[0055] As shown in FIG. 10, an automobile 300 according to the present application includes a battery module or battery pack 200 according to the present application.

[0056] As can be seen from the above, the present invention has the excellent performance described above, and therefore has practicality in use due to the improved effects that cannot be achieved by the prior art, making it a product of high practical value.

[0057] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. In addition, in the description of the present application, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are based on the orientations or positional relationships shown in the drawings, and are intended only to facilitate and simplify the description of the present application, and do not indicate or suggest that the illustrated devices or components must have a specific orientation and be configured and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0058] Additionally, the terms "first" and "second" are for descriptive purposes only and should not be understood to denote or suggest relative importance or to imply the number of technical features depicted. Thus, a feature qualified with "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, "plurality" means two or more than two, unless expressly and specifically limited otherwise.

[0059] In this application, unless otherwise clearly specified or limited, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, a communication between two components, or an interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0060] In this application, unless otherwise clearly specified or limited, a first feature being "above" or "below" a second feature may mean that the first feature and the second feature are in direct contact with each other, or that the first feature and the second feature are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," or "on the upper surface" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or may simply mean that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," or "on the lower surface" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or may simply mean that the horizontal height of the first feature is lower than that of the second feature.

[0061] In the description herein, references to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" mean that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, general expressions using the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, if not mutually inconsistent, a person skilled in the art may combine and combine different embodiments or examples described herein, and features of different embodiments or examples.

[0062] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are merely illustrative and should not be construed as limiting the present application. Those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application.

Claims

1. A battery including a case and a plurality of electrode body assemblies sealed in the case, the electrode body assemblies being connected in series and including a sealing film and at least one electrode body, the at least one electrode body being located within a receiving cavity formed by being surrounded by the sealing film; a spacer is installed between the two electrode body assemblies connected in series, a through-hole is installed in the spacer, the electrode body assembly includes a first electrode and a second electrode, the first electrode and the second electrode extend outside the sealing film, the first electrode of one of the two electrode body assemblies connected in series is connected to the second electrode of the other electrode body assembly, and the connection portion of the correspondingly connected first electrode and second electrode is accommodated in the through-hole; the spacer includes an outer peripheral surface facing the inner surface of the case, at least one first positioning portion is formed on the outer peripheral surface of the spacer, at least one second positioning portion is formed on the inner surface of the case in one-to-one correspondence with the at least one first positioning portion, and the at least one first positioning portion and the corresponding at least one second positioning portion are engaged with each other to fix the spacer and the case; The at least one first positioning portion is a groove formed by recessing the outer peripheral surface of the spacer into the spacer, and the at least one second positioning portion is a protrusion formed on the inner surface of the case, and the protrusion is fitted immovably into the groove, or A battery characterized in that at least one first positioning portion is a protrusion formed on the outer peripheral surface of the spacer, and at least one second positioning portion is a groove formed on the inner surface of the case, and the protrusion is immovably fitted into the groove.

2. 2. The battery according to claim 1, wherein the two electrode body assemblies connected in series are two adjacent electrode body assemblies, and the spacer is positioned between the two adjacent electrode body assemblies.

3. 3. The battery of claim 2, wherein the spacer includes a first insert and a second insert, the first insert and the second insert being located on either side of a connection portion of a correspondingly connected first electrode and a correspondingly connected second electrode, and together sandwiching the connection portion, and a gap between the first insert and the second insert constitutes the through hole.

4. 4. The battery according to claim 3, wherein the first insert and the second insert are each fixed to the electrode assembly with an adhesive.

5. 5. The battery according to claim 2, wherein a spacer is formed between two adjacent electrode body assemblies such that a plastic material is filled in a gap between the two adjacent electrode body assemblies to form the spacer.

6. 6. The battery according to claim 1, wherein the outer surface of the electrode assembly is fixed to the inner surface of the case with an adhesive.

7. A battery pack comprising a plurality of batteries according to any one of claims 1 to 6.

8. A vehicle comprising the battery pack of claim 7.

Images