Battery cell assembly, battery, battery pack and automobile

Abstract

The present disclosure provides a battery cell assembly (10), a battery (100), a battery pack (200), and an automobile (300), in which the battery cell assembly (10) includes a sealing membrane (11) and an electrode body assembly (12) including at least one electrode body (121) located in a storage cavity (110) surrounded by the sealing membrane, in which two electrode lead members (122) for drawing current and having opposite polarities are installed, and a middle ring (13) is further installed in the storage cavity (110), the middle ring is located on the side of the electrode body assembly (12) where the electrode lead members are installed, and the middle ring is installed with an electrode lead hole (131) for drawing the electrode lead members. At the same time, the present disclosure further provides a battery (100), a battery pack (200), and an automobile (300) based on the battery cell assembly according to the present disclosure.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This disclosure is based on and claims priority from Chinese Patent Application No. 202010421322.9, filed on May 18, 2020, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of batteries, and in particular to battery cell assemblies, batteries, battery packs, and automobiles. [Background technology]

[0003] As new energy vehicles become more popular, the requirements for the use of power batteries in new energy vehicles are becoming increasingly higher. In particular, users' requirements for the service life of power batteries are constantly increasing. In particular, taxis and buses generally require a service life of 5 years or more than 1 million kilometers. In order to provide capacity, conventional batteries generally have multiple electrically connected cells inside, and the positive and negative terminals of the cells that draw current are generally directly connected from both sides of the cells, which makes it easy for the positive and negative terminals to shake, which can adversely affect the connections between the cells, for example, making it easy for the connections between the cells to be broken, thereby affecting battery use. Summary of the Invention

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

[0005] In order to solve the above technical problems, the technical means of the present disclosure are as follows.

[0006] A battery cell assembly according to a first aspect of the present disclosure includes a sealing membrane and an electrode body assembly including at least one electrode body, the electrode body assembly being located in a receiving cavity surrounded by the sealing membrane; The electrode assembly is provided with two electrode lead members that lead out current and have opposite polarities; An intermediate ring is further installed in the receiving cavity, the intermediate ring being located on the side of the electrode assembly where the electrode lead member is installed, and the intermediate ring is provided with an electrode lead hole through which the electrode lead member is led out.

[0007] In some embodiments of the present disclosure, an electrolyte is injected into the accommodating cavity, and the intermediate ring is provided with at least one first reservoir recessed from the outer surface of the intermediate ring into the interior of the intermediate ring, and the first reservoir communicates with the accommodating cavity.

[0008] In some embodiments of the present disclosure, the area between the intermediate ring and the sealing membrane is not sealed, thereby providing communication between the first reservoir and the receiving cavity.

[0009] In some embodiments of the present disclosure, a plurality of reinforcing ribs are provided within the first reservoir tank to divide the first reservoir tank into a plurality of reservoir units.

[0010] In some embodiments of the present disclosure, the length of the electrode body extends along the first direction, the thickness of the electrode body extends along a second direction perpendicular to the first direction, the number of the first liquid reservoirs is plural, and the first liquid reservoirs are arranged along the second direction.

[0011] In some embodiments of the present disclosure, the electrode assembly includes an electrode assembly body and the electrode lead member electrically connected to the electrode assembly body, the length of the electrode assembly body extending along a first direction; The two electrode lead members are respectively led out from opposite sides of the electrode assembly body in the first direction, the number of the intermediate rings is two, and the two intermediate rings are respectively located on opposite sides of the electrode assembly body in the first direction.

[0012] In some embodiments of the present disclosure, the length of the electrode body extends along a first direction, the thickness of the electrode body extends along a second direction perpendicular to the first direction, the electrode body assembly body includes at least two electrode bodies arranged along the second direction, and the electrode bodies are connected in series or in parallel.

[0013] In some embodiments of the present disclosure, two adjacent electrode bodies are connected in parallel, and each electrode body includes an electrode body body and two tabs electrically connected to the electrode body body and having opposite polarities, the two tabs being located on both sides of the electrode body body in the first direction, the tabs with the same polarity of the two adjacent electrode bodies being located on the same side in the first direction, and the two adjacent tabs with the same polarity being electrically connected to realize the parallel connection of the two adjacent electrode bodies.

[0014] In some embodiments of the present disclosure, the electrode assembly body further includes a tab support member located between two adjacent tabs of the same polarity, and the two adjacent tabs of the same polarity are electrically connected to the tab support member, respectively; Each of the electrode lead members is electrically connected to one of the tab support members located on one side of the electrode assembly body in the first direction.

[0015] In some embodiments of the present disclosure, the connection portions of the tab support member, the electrode lead member, and the tab are located on different surfaces of the tab support member.

[0016] In some embodiments of the present disclosure, the tab support member includes two first surfaces located on opposite sides, each of which faces two adjacent tabs of the same polarity, and each of which is directly bonded to the two first surfaces of the tab support member.

[0017] In some embodiments of the present disclosure, at least one tab support member connected to the electrode lead member is a rectangular member, and the rectangular member includes two of the first surfaces, a third surface located between the two first surfaces and facing the electrode body body, and a fourth surface located opposite the third surface; A tab support member electrically connected to the electrode lead member is connected to the electrode lead member via the fourth surface.

[0018] In some embodiments of the present disclosure, the interior of at least one of the tab support members is a hollow cavity.

[0019] In some embodiments of the present disclosure, an opening is provided in at least one cavity wall of the hollow cavity to communicate with an electrode withdrawal hole in the intermediate ring located on the same side, thereby further forming a second reservoir in the hollow cavity.

[0020] In some embodiments of the present disclosure, at least one of the tab support members is a U-shaped member, an opening of the U-shaped member is oriented parallel to the first direction, the U-shaped member includes two opposing side walls and a bottom wall located between the two opposing side walls, and outer surfaces of the two opposing side walls are the two first surfaces, respectively.

[0021] In some embodiments of the present disclosure, the opening of the U-shaped member faces the electrode body, and a tab support member electrically connected to the electrode lead member is connected to the electrode lead member through the bottom wall.

[0022] In some embodiments of the present disclosure, the openings of the U-shaped members face the intermediate ring located on the same side, and a tab support member electrically connected to the electrode leader member is connected to the electrode leader member through one of the side walls.

[0023] In some embodiments of the present disclosure, the opening of the U-shaped member communicates with an electrode lead-out hole in the intermediate ring located on the same side, thereby forming a second reservoir in the internal cavity of the U-shaped member.

[0024] In some embodiments of the present disclosure, an insulating spacer is disposed between the tab support member and the electrode body.

[0025] In some embodiments of the present disclosure, both ends of the electrode body that are opposite to each other in the first direction are V-shaped end faces with tips protruding outward, and the two tabs of each electrode body are located at the tips of the two V-shaped end faces, respectively, so that a V-shaped space is formed between the V-shaped end faces at the same ends in the first direction of the two adjacent electrode body bodies; The insulating spacer is a V-shaped member that matches the shape of the V-shaped space, and the V-shaped member fits within the V-shaped region.

[0026] In some embodiments of the present disclosure, the V-angle of the V-shaped space is 90 to 150 degrees.

[0027] In some embodiments of the present disclosure, the insulating spacer and the tab support member are secured together by a snap fit.

[0028] In some embodiments of the present disclosure, the side of the intermediate ring facing the electrode assembly body has an accommodation space, and the two intermediate rings are respectively attached to opposite sides of the electrode assembly body in a first direction, and each side of the electrode assembly body in the first direction is fitted into the accommodation space of the corresponding intermediate ring.

[0029] A battery according to a second aspect of the present disclosure includes a case and at least one battery cell assembly sealed within the case, the battery cell assembly being any one of the battery cell assemblies described above.

[0030] A battery module according to a third aspect of the present disclosure includes a plurality of the above batteries.

[0031] A battery pack according to a fourth aspect of the present disclosure includes a plurality of the above batteries or a plurality of the above battery modules.

[0032] A vehicle according to a fifth aspect of the present disclosure includes the battery module or the battery pack.

[0033] Compared with the prior art, the beneficial effects of the present disclosure are as follows:

[0034] In the battery cell assembly according to the present disclosure, an intermediate ring is installed within the sealing film, and the intermediate ring is located on the side of the electrode body assembly where the electrode lead member is installed. The intermediate ring is provided with an electrode lead hole through which the electrode lead member is led out. The electrode lead member emerges from the electrode lead hole, which helps to fix the electrode lead member in place through the action of the intermediate ring. This makes the electrode lead member less likely to shake or move, resulting in a stable and reliable connection and helping to extend the service life of the battery cell assembly. [Brief explanation of the drawings]

[0035] [Figure 1] FIG. 1 is a schematic configuration diagram of a battery cell assembly according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a front view of the battery cell assembly in FIG. [Figure 3] 3 is a cross-sectional view of the battery cell assembly taken along line III-III in FIG. 2. FIG. [Figure 4] FIG. 2 is a schematic diagram of the battery cell assembly in FIG. 1 with the sealing film removed. [Figure 5] FIG. 5 is a schematic diagram of the battery cell assembly in FIG. 4 with the intermediate ring removed. [Figure 6] FIG. 2 is an exploded view of a battery cell assembly according to the first embodiment of the present disclosure. [Figure 7]FIG. 2 is an assembly view of an insulating spacer, a tab support member, and an electrode lead member in the first embodiment of the present disclosure. [Figure 8] FIG. 8 is an exploded view of FIG. 7. [Figure 9] 10A and 10B are schematic diagrams illustrating the configuration of a tab support member according to another embodiment. [Figure 10] FIG. 10 is a schematic diagram of a battery cell assembly according to a second embodiment of the present disclosure. [Figure 11] FIG. 11 is a front view of the battery cell assembly in FIG. 10. [Figure 12] 12 is a cross-sectional view of the battery cell assembly taken along line XII-XII in FIG. 11. [Figure 13] FIG. 10 is a perspective view of an intermediate ring in one direction according to a second embodiment of the present disclosure. [Figure 14] FIG. 10 is a left side view of an intermediate ring according to a second embodiment of the present disclosure. [Figure 15] FIG. 15 is a cross-sectional view taken along the line XV-XV in FIG. [Figure 16] FIG. 10 is a perspective view of the intermediate ring in the second embodiment of the present disclosure, viewed from another direction. [Figure 17] FIG. 1 is a schematic diagram of a battery not including a case according to an embodiment of the present disclosure. [Figure 18] 1 is a schematic diagram of a battery including a case according to an embodiment of the present disclosure. [Figure 19] 1 is a schematic configuration diagram of a battery pack according to an embodiment of the present disclosure. [Figure 20] 1 is a schematic configuration diagram of a vehicle according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0036] Hereinafter, embodiments of the present disclosure will be described in detail, and examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent 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 disclosure, but should not be understood as limiting the present disclosure.

[0037] In addition, in describing the present disclosure, orientations or positional relationships indicated by terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are based on the orientations or positional relationships shown in the drawings, and are intended merely to facilitate and simplify the description of the present disclosure, and do not indicate or suggest that the depicted devices or parts must have a specific orientation or be configured and operated in a specific orientation, and therefore should not be understood as limiting the present disclosure.

[0038] Additionally, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or suggesting the relative importance or quantity of the indicated technical features. Thus, a feature qualified with "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this disclosure, "plurality" means two or more unless explicitly and specifically limited.

[0039] In this disclosure, 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 disclosure according to specific circumstances.

[0040] The battery cell assembly 10 according to the present disclosure includes: battery Applies to 100, battery As 100 cells battery 100 is sealed in the case 20, battery 100 includes at least one battery cell assembly 10, the battery cell assembly 10 including a sealing film 11 and an electrode body assembly 12 located in a receiving cavity 110 surrounded by the sealing film 11 and including at least one electrode body 121; The electrode assembly 12 is provided with two electrode lead members 122 that lead out current and have opposite polarities. An intermediate ring 13 is further installed in the accommodating cavity 110, and is located on the side where the electrode extraction member 122 of the electrode assembly 12 is installed. The intermediate ring 13 has an electrode extraction hole 131 that extracts the electrode extraction member 122 and passes through the intermediate ring 13.

[0041] Compared with the prior art, the beneficial effects of the present disclosure are as follows:

[0042] In the battery cell assembly 10, an intermediate ring 13 is installed within the sealing film 11, and the intermediate ring 13 is located on the side of the electrode body assembly 12 where the electrode lead member 122 is installed. The intermediate ring 13 is provided with electrode lead holes 131 through which the electrode lead member 122 is pulled out. The electrode lead member 122 emerges from the electrode lead hole 131, which helps to fix the electrode lead member 122 in place. This makes the electrode lead member 122 less likely to shake or move, resulting in a stable and reliable connection and helping to extend the service life of the battery cell assembly 10.

[0043] 1, 2, and 3, FIG. 1 is a schematic structural diagram of a battery cell assembly 10 according to a first embodiment of the present disclosure. FIG. 2 is a front view of the battery cell assembly 10 in FIG. 1. FIG. 3 is a cross-sectional view of the battery cell assembly 10 taken along line III-III in FIG. 2. The battery cell assembly 10 includes a sealing film 11 and one electrode body assembly 12. The sealing film 11 surrounds a receiving cavity 110, and the electrode body assembly 12 is located in the receiving cavity 110 and includes at least one electrode body 121. Referring to FIGS. 4 and 5, FIG. 4 is a schematic structural diagram of the battery cell assembly 10 in FIG. 1 with the sealing film 11 removed, i.e., a schematic structural diagram of the electrode body assembly 12, and FIG. 5 is a schematic structural diagram of the battery cell assembly 10 in FIG. 4 with the intermediate ring 13 removed. The electrode assembly 12 is provided with two electrode lead members 122 of opposite polarity that extract current, one of which is a positive electrode lead member and the other a negative electrode lead member. An intermediate ring 13 is also provided within the accommodating cavity 110. The intermediate ring 13 is located on the side of the electrode assembly 12 where the electrode lead members 122 are installed, and the intermediate ring 13 is provided with electrode lead holes 131 through which the electrode lead members 122 are extracted.

[0044] Therefore, in the embodiment of the present disclosure, an intermediate ring 13 is installed within the sealing film 11 of the battery cell assembly 10, and the intermediate ring 13 is located on the side where the electrode lead member 122 of the electrode body assembly 12 is installed. The intermediate ring 13 is provided with an electrode lead hole 131 through which the electrode lead member 122 is pulled out. The electrode lead member 122 is pulled out through the electrode lead hole 131, and the action of the intermediate ring 13 helps to fix the electrode lead member 122, preventing the electrode lead member 122 from shaking to a certain extent, which helps to improve the stability and reliability of the connection of the electrode lead member 122 and extend the service life of the battery cell assembly 10.

[0045] In some embodiments of the present disclosure, an electrolyte solution is further injected into the accommodating cavity 110. As can be understood, after the electrolyte solution is injected into the accommodating cavity 110, it fills the space between the inner surface of the sealing film 11 and the outer surface of the electrode body assembly 12. The intermediate ring 13 is provided with at least one first reservoir 132 recessed from the outer surface of the intermediate ring 13 into the intermediate ring 13. Since the first reservoir 132 is in communication with the accommodating cavity 110, after the electrolyte solution is injected into the accommodating cavity 110, the electrolyte solution may flow into the first reservoir 132, thereby allowing the first reservoir 132 to additionally store the electrolyte solution.

[0046] The electrolyte content in a battery is an important factor affecting the battery's service life. However, due to factors such as battery expansion during use, the electrolyte content gradually decreases, which not only affects the battery's service life but also causes phenomena such as lithium deposition in certain areas of the battery, reducing the safety of the battery.

[0047] In the embodiment of the present disclosure, by providing the first reservoir 132 in the intermediate ring 13, when electrolyte is injected into the sealing film 11, the first reservoir 132 can store a certain amount of electrolyte. Therefore, when the sealing film 11 is vacuumed during the cell molding process, the possibility of free electrolyte being sucked out during the vacuuming process is reduced and more electrolyte can be stored. Furthermore, during long-term battery use, electrolyte can be replenished inside the battery cell assembly 10 in a timely manner, which reduces the occurrence of lithium precipitation in the battery and improves the cycle life performance of the battery.

[0048] In some embodiments of the present disclosure, the area between the intermediate ring 13 and the sealing membrane 11 is not sealed, thereby communicating the first reservoir 132 with the accommodating cavity 110. That is, the intermediate ring 13 is located within the sealing membrane 11, but the outer surface of the intermediate ring 13 and the inner surface of the sealing membrane 11 are not sealed. As a result, when an electrolyte solution is injected into the accommodating cavity 110 surrounded by the sealing membrane 11, the electrolyte solution can flow into the first reservoir 132, and the first reservoir 132 can store a certain amount of electrolyte solution.

[0049] In one embodiment of the present disclosure, a plurality of reinforcing ribs 1321 are provided inside the first reservoir 132 to divide the first reservoir 132 into a plurality of reservoir units 1322 .

[0050] In some embodiments of the present disclosure, The number of reinforcing ribs 1321 is three. The three reinforcing ribs 1321 divide the first liquid storage tank 132 into four liquid storage units 1322. As can be understood, in other embodiments, the number of reinforcing ribs 1321 is not limited to three, and may be one, two, four, five, etc. The number of liquid storage units 1322 may be four, but is not limited to this, and may be less than four or more than four, etc.

[0051] Thus, by providing the reinforcing ribs 1321 in the first liquid storage tank 132, the strength of the entire intermediate ring 13 is increased, and the intermediate ring 13 can have a higher pressure resistance strength.

[0052] Preferably, in some embodiments of the present disclosure, the widths of the four storage units 1322 may be equal or unequal, so that the width of each storage unit 1322 can be adjusted according to the arrangement between the storage units 1322, thereby making the overall arrangement more reasonable.

[0053] Preferably, in some embodiments of the present disclosure, one opening 130 is provided in each storage unit 1322 to allow the electrolyte in each storage unit 1322 to flow into the accommodating cavity 110, and the opening 130 helps the electrolyte to flow out of the storage unit 1322.

[0054] Preferably, in some embodiments of the present disclosure, the opening 130 communicates the reservoir unit 1322 with the electrode lead-out hole 131 .

[0055] This facilitates the electrolyte in the reservoir unit 1322 to flow out of the reservoir unit 1322 and into the receiving cavity 110 .

[0056] In some embodiments of the present disclosure, the length of the electrode body 121 extends along a first direction L, the thickness of the electrode body 121 extends along a second direction W perpendicular to the first direction L, the number of first liquid storage tanks 132 is multiple, and the multiple first liquid storage tanks 132 are arranged along the second direction W.

[0057] In this disclosure, the first direction refers to the longitudinal direction of the electrode body 121 in Fig. 1, i.e., the L direction shown in Fig. 1. The second direction refers to the thickness direction of the electrode body 121 in Fig. 1, i.e., the W direction shown in Fig. 1.

[0058] In this embodiment, the number of first liquid storage tanks 132 is two, and the two first liquid storage tanks 132 are arranged along the second direction W and installed symmetrically on both sides of the electrode lead-out hole 131.

[0059] As can be understood, in some embodiments of the present disclosure, the number of first reservoirs 132 may be three or more and is not limited herein.

[0060] As a result, by making full use of the space above the intermediate ring 13, the strength of the intermediate ring 13 is ensured, and more first storage tanks 132 can be installed, which can store electrolyte, reduce the occurrence of lithium precipitation in the battery, and improve the cycle life performance of the battery.

[0061] 4 , in some embodiments of the present disclosure, the electrode assembly 12 includes an electrode assembly body 123 and an electrode lead member 122 electrically connected to the electrode assembly body 123. The length of the electrode assembly body 123 extends along a first direction L. The number of intermediate rings 13 is two, and the two intermediate rings 13 are located on opposite sides of the electrode assembly body 123 in the first direction L. The two electrode lead members 122 are led out from opposite sides of the electrode assembly body 123 in the first direction L and are led out from electrode lead holes 131 of the corresponding intermediate rings 13.

[0062] Therefore, when there are two intermediate rings 13 and the two intermediate rings 13 are located on both sides of the electrode assembly body 123 in the first direction L, the multiple first liquid storage tanks 132 provide multiple liquid storage spaces, and since the two intermediate rings 13 are installed symmetrically, the entire battery cell assembly 10 has a symmetrical structure, with uniform force-bearing, higher structural stability, and better pressure-resistant and anti-collision performance.

[0063] In some embodiments of the present disclosure, the intermediate ring 13 is attached to the electrode assembly body 123, i.e., as shown in FIG. 4, two intermediate rings 13 are attached to opposite sides of the electrode assembly body 123 in the first direction L. Also refer to FIG. 6, which is an exploded view of a battery cell assembly 10 in a first embodiment of the present disclosure, in which the side of the intermediate ring 13 facing the electrode assembly body 123 has an accommodating space 134. The two intermediate rings 13 are attached to opposite sides of the electrode assembly body 123 in the first direction L. The electrode assembly body 123 is fitted into the accommodating spaces 134 corresponding to the intermediate rings 13 on both sides opposite the first direction L.

[0064] As a result, the two intermediate rings 13 are respectively located on opposite sides of the electrode assembly body 123 in the first direction L, and are respectively attached to opposite sides of the electrode assembly body 123 in the first direction L, and the opposite sides of the electrode assembly body 123 in the first direction L are respectively fitted into the accommodating spaces 134 of the corresponding intermediate rings 13, resulting in greater structural stability.

[0065] Preferably, in some embodiments of the present disclosure, the number of intermediate rings 13 is 1. Two electrode lead members 122 extend from one side of the electrode assembly 12, and the intermediate ring 13 is installed on the side of the electrode assembly 12 where the electrode lead members 122 are installed. The intermediate ring 13 is provided with electrode lead holes 131 through which the two electrode lead members 122 are led out.

[0066] This allows the number of intermediate rings 13 to be reduced and material costs to be reduced, while still ensuring the pressure resistance performance of the battery cell assembly 10.

[0067] 3, in some embodiments of the present disclosure, the length of the electrode body 121 extends along a first direction L, the thickness of the electrode body 121 extends along a second direction W perpendicular to the first direction L, the electrode body assembly body 123 includes at least two electrode bodies 121 arranged along the second direction W, and the electrode bodies 121 are connected in series or in parallel. As shown in FIGS. 4 to 6, the figures show two electrode bodies 121 connected in parallel, and the two electrode bodies 121 are arranged along the thickness direction of the electrode body 121, i.e., the second direction W.

[0068] In some embodiments of the present disclosure, two adjacent electrode bodies 121 are connected in parallel. Each electrode body 121 includes an electrode body body 1211 and two tabs 1213 electrically connected to the electrode body body 1211 and having opposite polarities, the two tabs 1213 being located on opposite sides of the electrode body body 1211 in the first direction L. One of the two tabs 1213 of the electrode body 121 is a positive electrode tab, and the other is a negative electrode tab.

[0069] The tabs 1213 of two adjacent electrode bodies 121 with the same polarity are located on the same side in the first direction L, and the two adjacent tabs 1213 with the same polarity are electrically connected to achieve a parallel connection of the two adjacent electrode bodies 121. Furthermore, the positive electrode tabs 1213 of two adjacent electrode bodies 121 are located on the same side in the first direction L, and the negative electrode tabs 1213 are located on the other side in the first direction L, so that the two adjacent tabs 1213 located on the same side are electrically connected to achieve a parallel connection of the two adjacent electrode bodies 121.

[0070] The electrode assembly 121 referred to in this disclosure is a typical electrode assembly in the field of power batteries. The electrode assembly 121 and the electrode assembly assembly 12 are internal components of a battery case and should not be understood as a battery itself. The electrode assembly 121 may be a wound electrode assembly 121 and generally refers to an assembly that is not completely sealed. Therefore, the battery referred to in this disclosure should not be simply understood as a battery module or assembled battery because it includes multiple electrode assemblies 121. In this disclosure, the electrode assembly 12 may be composed of one independent electrode assembly 121 or may include multiple electrode assemblies 121, and the multiple electrode assemblies 121 are connected in parallel to form the electrode assembly 12. For example, two electrode assemblies 121 are connected in parallel to form the electrode assembly 12, or four electrode assemblies 121 are connected in parallel to form the electrode assembly 12, or eight electrode assemblies 121 are connected in parallel to form the electrode assembly 12.

[0071] In some embodiments of the present disclosure, the electrode body assembly body 123 further includes a tab support member 124 located between two adjacent tabs 1213 of the same polarity, and each of the two adjacent tabs 1213 of the same polarity is electrically connected to the tab support member 124, i.e., two adjacent tabs 1213 located on the same side are electrically connected by the tab support member 124, and the tab support members 124 are installed on both sides of the electrode body assembly 12 in the longitudinal direction, as shown in FIG. 3 .

[0072] Each electrode lead member 122 of the electrode assembly 12 is electrically connected to one of the tab support members 124 located on one side of the electrode assembly body 123 in the first direction L. As can be understood, when the electrode assembly 12 has three, four, or more electrode bodies 121, the number of tab support members 124 located on both sides of the electrode assembly 12 in the longitudinal direction may be plural. In the embodiments of the present disclosure, the electrode lead member 122 and the positive electrode tab 1213 of the electrode assembly 12 having a positive polarity are located on the same side of the electrode assembly 12 and are electrically connected to the positive electrode tab 1213, and the electrode lead member 122 and the negative electrode tab 1213 are located on the other side of the electrode assembly 12 and are electrically connected to the negative electrode tab 1213. In some embodiments of the present disclosure, the electrode lead member 122 is electrically connected to one of the tab support members 124 located on the same side, thereby achieving electrical connection to the corresponding tab 1213.

[0073] In the embodiments shown in Figures 3 to 6, the electrode body assembly 12 includes two electrode bodies 121. In this case, one tab support member 124 is installed on each of the opposite sides of the electrode body assembly 12 along the first direction L, and the tab support members 124 on both sides are located between the two tabs 1213 located on the same side and are electrically connected to the two tabs 1213 located on the same side.

[0074] As can be understood, in some embodiments of the present disclosure, when the number of tab support members 124 located on the same side of the electrode body 121 is two or more, two adjacent tab support members 124 located on the same side are separated by a tab 1213. Therefore, in order to electrically connect two adjacent tab support members 124, it is necessary to provide a protruding edge on the tab support member 124 that extends beyond the edge of the tab 1213 along the first direction L, so that the two adjacent tab support members 124 are connected to each other so that their protruding edges come into contact.

[0075] In some embodiments of the present disclosure, referring to FIGS. 5 to 8 , the connection portion between the tab support member 124 and the electrode lead member 122 and the connection portion between the tab support member 124 and the tab 1213 are located on different surfaces of the tab support member 124, i.e., the connection portion between the tab support member 124 and each of the electrode lead members 122 and the tab 1213 electrically connected to the same tab support member 124 are located on different surfaces of the tab support member 124, thereby making it possible to avoid the electrode lead member 122 and the tab 1213 being stacked on the same surface of the tab support member 124 at the same time and helping to reduce the thickness of the connection portion between the tab support member 124 and the electrode lead member 122 or the tab 1213.

[0076] In some embodiments of the present disclosure, the electrode lead member 122 includes a contact portion 1221 and a lead portion 1223. The contact portion 1221 is directly electrically connected to the tab support member 124. The lead portion 1223 extends from the contact portion 1221 along the first direction L. The portion of the contact portion 1221 bonded to the tab support member 124 is plate-shaped, which increases the contact area between the contact portion 1221 and the tab support member 124 and the welding area between the tab support member 124 and the contact portion 1221, thereby improving the reliability of the connection. In this embodiment, the lead portion 1223 is connected to one side of the contact portion 1221 in the first direction L to form an L-shaped holder. As can be understood, in other embodiments, the lead portion 1223 is connected to a middle portion of the contact portion 1221 in the first direction L to form a T-shaped holder. The contact portion 1221 of the electrode lead member 122 and the tab support member 124 may be electrically connected by welding.

[0077] In some embodiments of the present disclosure, the tab support member 124 includes two first surfaces 1241 located on opposite sides, each facing two adjacent tabs 1213 of the same polarity, and each adjacent tab 1213 of the same polarity is directly bonded to the two first surfaces 1241 of the tab support member 124. The tabs 1213 and the tab support member 124 may be electrically connected by welding. Bonding and fixing the tabs 1213 to the first surfaces 1241 of the tab support member 124 helps prevent the tabs 1213 from moving or displacing.

[0078] In some embodiments of the present disclosure, at least one tab support member 124 connected to the electrode lead member 122 is a rectangular member, i.e., the cross section of the tab support member 124 is rectangular, and overall, the tab support member 124 has a cubic structure. As can be understood, in the present disclosure, all of the tab support members 124 may be installed as rectangular members. Installing the tab support members 124 as rectangular members can provide greater support to the tabs 1213 between adjacent tabs 1213, and particularly when welding the tabs 1213 and the tab support member 124, this helps prevent the tab support member 124 from deforming during the welding process and improves the pressure resistance of the tab support member 124.

[0079] In some embodiments of the present disclosure, the rectangular member includes two first surfaces 1241, a third surface 1243 located between the two first surfaces 1241 and facing the electrode body 1211, and a fourth surface 1244 located opposite the third surface 1243.

[0080] The tab support member 124, which is electrically connected to the electrode lead member 122, is connected to the electrode lead member 122 via the fourth surface 1244. Specifically, the contact portion 1221 of the electrode lead member 122 is connected to the fourth surface 1244 of the tab support member 124, and adjacent tabs 1213 are respectively connected to the two first surfaces 1241. That is, the electrode lead member 122 and the tab 1213 are both in direct contact and connection with the tab support member 124, and the connection portions are located on different surfaces of the tab support member 124. This prevents the electrode lead member 122 and the tab 1213 from being stacked on the same surface of the tab support member 124 at the same time. This reduces the thickness of the connection portions between the tab support member 124 and the electrode lead member 122 and the connection portions between the tab support member 124 and the tab 1213, and makes it easier to connect the electrode lead member 122 and the tab support member 124.

[0081] In some embodiments of the present disclosure, the interior of at least one tab support member 124 is a hollow cavity 1240, and for example, all of the tab support members 124 may be configured to have a hollow cavity inside. By configuring the tab support members 124 as hollow, it is possible to ensure support strength and reduce weight.

[0082] In some embodiments of the present disclosure, an opening is provided in at least one cavity wall of the hollow cavity 1240, and as shown in Figures 7 and 8, openings may be provided on both end surfaces of the hollow cavity 1240, which openings communicate with the electrode lead-out holes 131 in the intermediate ring 13 located on the same side of the tab support member 124, thereby further forming a second liquid reservoir in the hollow cavity 1240. As shown in Figure 6, one intermediate ring 13 is installed on each side of the electrode assembly 12 that is located opposite to each other in the first direction L, and the two electrode lead-out members 122 of the electrode assembly 12 are located on each side of the electrode assembly 12 that is located opposite to each other in the first direction L and are led out from electrode lead-out holes 131 in the intermediate rings 13 that are located on the same side. By connecting the tab support member 124 to the electrode lead-out holes 131 in the intermediate rings 13 that are located on the same side, when electrolyte is injected into the sealing film 11, the electrolyte can flow from the electrode lead-out holes 131 into the hollow cavity 1240 that is connected to it, and the hollow cavity 1240 can store the electrolyte, thereby realizing a liquid storage function.

[0083] 9, in some other embodiments, an opening 1245 may be provided in the cavity wall where the fourth surface 1244 of the tab support member 124 is located, and the opening 1245 communicates with the electrode lead-out hole 131 in the intermediate ring 13 located on the same side, thereby further forming a second reservoir in the hollow cavity 1240. By providing an opening communicating with the electrode lead-out hole 131 in the cavity wall where the fourth surface 1244 is located, the electrolyte can flow into and out of the hollow cavity 1240, thereby further increasing the reservoir space by providing the second reservoir.

[0084] 3, 6, 7, and 8, in some embodiments of the present disclosure, an insulating spacer 125 is disposed between the tab support member 124 and the electrode body 1211. The insulating spacer 125 serves to provide electrical insulation between the electrode body 121 and the tab support member 124.

[0085] In some embodiments of the present disclosure, referring again to FIG. 3 , opposite ends of the electrode body 1211 in the first direction L have V-shaped end faces with tips protruding outward, the two tabs 1213 of each electrode body 121 are respectively located at the tips of the two V-shaped end faces, and a V-shaped space is formed between the V-shaped end faces of two adjacent electrode bodies 1211 at the same end in the first direction L, and the insulating spacer 125 is a V-shaped member that matches the shape of the V-shaped space, and the V-shaped member fits within the V-shaped region, i.e., the outer surfaces of both V-shaped sides of the insulating spacer 125 are respectively bonded to the two V-shaped end faces that form the V-shaped space, which not only isolates the electrode body 1211 and the tab support member 124, but also provides a certain support for the V-shaped end faces of the electrode body 1211 and helps prevent the electrode body assembly 12 from being deformed when subjected to an impact.

[0086] In some embodiments of the present disclosure, the V-angle of the V-shaped space is 90 to 150 degrees. In some embodiments of the present disclosure, the range of the V-angle may be, for example, 100 to 120 degrees, or 120 to 145 degrees, or in some embodiments, 95 degrees, 110 degrees, or 125 degrees, etc., but is not limited thereto.

[0087] Of course, in some other embodiments, the opposite ends of the electrode body 1211 in the first direction L may be flat, rectangular, arc-shaped, etc. Accordingly, the shape of the insulating spacer 125 may need to be adaptively adjusted to fit the electrode body 1211. The present disclosure is not limited thereto.

[0088] In some embodiments of the present disclosure, the insulating spacer 125 and the tab support member 124 are secured together by a snap fit. In some embodiments, referring to FIG. 8 , a snap fit 1251 is provided on the insulating spacer 125, and a locking hole 1246 is provided on the third surface 1243 of the tab support member 124. The snap fit 1251 is pressed and deformed to lock into the locking hole 1246, thereby forming a snap fit connection. The number of snap fits 1251 may be two, and the number of locking holes 1246 may be two, with the two snap fits 1251 respectively locking into the two locking holes 1246 to form the snap fit connection. This forms a stable connection between the insulating spacer 125 and the tab support member 124.

[0089] The insulating spacer 125 and the tab support member 124 may be in contact with each other without being fixed by a fixing member, or they may be fixed by abutting each other with a reasonable spatial arrangement. Furthermore, the insulating spacer 125 and the tab support member 124 may be bonded with an adhesive or fixed together in other ways, and this is not a limitation.

[0090] 10, 11, and 12, FIG. 10 is a perspective view of a battery cell assembly 10 according to a second embodiment. FIG. 11 is a front view of the battery cell assembly 10 according to the second embodiment. FIG. 12 is a cross-sectional view of the battery cell assembly 10 according to the second embodiment taken along the XII-XII direction. Differences from the first embodiment include that in the second embodiment, the tab support member 124 is a U-shaped member, the opening of the U-shaped member is parallel to the first direction L, the U-shaped member includes two opposing side walls 1247 and a bottom wall 1248 located between the two opposing side walls 1247, and the outer surfaces of the two opposing side walls 1247 are two first surfaces 1241, respectively. That is, two adjacent tabs 1213 are bonded to the outer surfaces of the two opposing side walls 1247, respectively.

[0091] 12 , the openings of the U-shaped members face the intermediate ring 13 located on the same side, i.e., the openings of the U-shaped members are located away from the electrode body 1211, and the tab support member 124 electrically connected to the electrode lead member 122 is connected to the electrode lead member 122 via one of the side walls 1247. In some embodiments, the portion of the electrode lead member 122 electrically connected to the tab support member 124 is located between one of the tabs 1213 and the corresponding side wall 1247, i.e., the electrode lead member 122 and one tab 1213 are overlapped on the outer surface of one of the side walls 1247, and the three are fixed by welding.

[0092] The opening of the U-shaped member communicates with the electrode lead-out hole 131 in the intermediate ring 13 located on the same side, thereby forming a second reservoir in the internal cavity 133 of the U-shaped member, thereby further increasing the auxiliary storage space for the electrolyte.

[0093] In some embodiments of the present disclosure, the opening of the U-shaped member faces the electrode body 1211, and the tab support member 124 electrically connected to the electrode lead member 122 is connected to the electrode lead member 122 via the bottom wall 1248.

[0094] In some embodiments of the present disclosure, an insulating spacer 125 is disposed between the tab support member 124 and the electrode body 1211 .

[0095] In some embodiments of the present disclosure, both ends of the electrode body 1211 in the first direction L are V-shaped end faces with tips protruding outward, the two tabs 1213 of each electrode body are respectively located at the tips of the two V-shaped end faces, a V-shaped space is formed between the V-shaped end faces at the same end in the first direction L of two adjacent electrode body bodies 1211, the insulating spacer 125 is a V-shaped member that matches the shape of the V-shaped space, and the V-shaped member is fitted within the V-shaped region.

[0096] In some embodiments of the present disclosure, the V-angle of the V-shaped space is between 90 and 150 degrees.

[0097] In some embodiments of the present disclosure, both ends of the electrode body 1211 in the first direction L are flat, rectangular, arc-shaped, etc. Accordingly, the shape of the insulating spacer 125 also needs to be adaptively adjusted to fit the electrode body 1211. The present disclosure is not limited thereto.

[0098] In some embodiments of the present disclosure, the insulating spacer 125 and the tab support member 124 are secured together by a snap fit.

[0099] In some embodiments of the present disclosure, a snap fit 1251 is provided on the insulating spacer 125, and a locking hole 1246 is provided on the third surface 1243 of the tab support member 124. The snap fit 1251 is pressed and deformed to lock into the locking hole 1246, thereby forming a snap fit connection.

[0100] In this embodiment, the number of snap fits 1251 is two, the number of locking holes 1246 is two, and the two snap fits 1251 are respectively locked into the two locking holes 1246 to form a snap fit connection.

[0101] Thereby, by forming a stable connection between the insulating spacer 125 and the tab support member 124 , the insulating spacer 125 can insulate between the tab support member 124 and the electrode body main body 1211 .

[0102] 13, 14, 15, and 16, in the second embodiment, a reinforcing rib 1321 is not provided in the first liquid storage tank 132, i.e., the first liquid storage tank 132 includes only one liquid storage unit 1322. The number of first liquid storage tanks 132 is two, and the two first liquid storage tanks 132 are arranged along the second direction W and are symmetrically provided on both sides opposite the electrode lead-out hole 131.

[0103] In some embodiments of the present disclosure, the number of first reservoirs 132 may be three or more and is not limited thereto.

[0104] As a result, by fully utilizing the space above the intermediate ring 13, the intermediate ring 13 can store more electrolyte, reduce the occurrence of lithium deposition in the battery, improve the cycle life performance of the battery, and simplify the structure of the intermediate ring 13.

[0105] Of course, in some other embodiments, the opening of the U-shaped member may face the electrode body main body 1211, i.e., the opening of the U-shaped member is located adjacent to the electrode body main body 1211, and the tab support member 124 electrically connected to the electrode lead member 122 is connected to the electrode lead member 122 via the bottom wall 1248, i.e., the connection portion between the tab support member 124 and the electrode lead member 122 and the connection portion between the tab support member 124 and the tab 1213 are respectively located on different surfaces of the tab support member 124, thereby making it easier to achieve electrical connection between the electrode lead member 122 and the tab support member 124 and at the same time reducing the thickness of the connection portion.

[0106] 17 and 18 , in an embodiment of a battery according to the present disclosure, a battery 100 includes a case 20 and at least one battery cell assembly 10 sealed in the case 20, and as shown in FIG. 17 , a plurality of battery cell assemblies 10 are sealed in the case 20, arranged in order along the longitudinal direction of the battery 100. When a plurality of battery cell assemblies 10 are connected in series, the positive electrode lead member of one of the two battery cell assemblies 10 is electrically connected to the negative electrode lead member of the other battery cell assembly 10, thereby realizing a series connection between the two battery cell assemblies 10. The battery cell assembly 10 is the battery cell assembly 10 described in any of the above embodiments.

[0107] In some embodiments of the present disclosure, the case 20 is a metal case, such as an aluminum case, although it may of course be made of other metals if desired.

[0108] In some embodiments of the present disclosure, the battery 100 is a substantially rectangular parallelepiped, and 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 to 2500 mm. The ratio of the length to the height of the battery 100 is 4 to 21.

[0109] It should be understood that battery 100 being approximately rectangular parallelepiped means that battery 100 may be rectangular parallelepiped or cubic in shape, or may have local irregularities but be approximately rectangular parallelepiped or cubic in shape, and may have notches, protrusions, chamfers, curvatures, or curves in some parts, but is approximately rectangular parallelepiped or cubic in shape overall.

[0110] A battery module according to the present disclosure includes a plurality of batteries 100 according to the present disclosure.

[0111] A battery pack 200 according to the present disclosure includes a plurality of batteries 100 according to the present disclosure or a battery module according to the present disclosure.

[0112] Referring to FIG. 19, a battery pack 200 according to the present disclosure includes a tray 22 and a battery 100 disposed in the tray 22.

[0113] An automobile 300 (see FIG. 20) according to the present disclosure includes a battery module or battery pack 200 according to the present disclosure.

[0114] As can be seen from the above, the present disclosure has the excellent performance described above, and therefore has practicality in use due to improved effects that cannot be achieved by conventional technologies, making it a product of high practical value.

[0115] The above descriptions are merely preferred embodiments of the present disclosure and do not limit the present disclosure, and any modifications, equivalent replacements, or improvements made within the spirit and principle of the present disclosure should be included within the protection scope of the present disclosure. [Explanation of symbols]

[0116] 10 Battery Cell Assembly 11 Sealing film 110 Storage cavity 12 Electrode assembly 121 Electrode body 1211 Electrode body 1213 tabs 122 Electrode extraction member 1221 Contact part 1223 Drawer section 123 Electrode assembly body 124 Tab support member 1240 hollow cavity 1241 1st surface 1243 Third surface 1244 4th surface 1248 Bottom wall 1245 Opening 1247 Side wall 125 Insulating spacer 1246 Locking hole 1251 Snap Fit 13 Intermediate ring 130 Opening 131 Electrode lead-out hole 132 1st liquid storage tank 1321 Reinforcing rib 1322 Storage Unit 133 Internal Cavity 134 Containment Space 100 batteries 200 battery packs 22 Tray 20 cases 300 cars

Claims

1. A battery cell assembly comprising: a sealing membrane; and an electrode body assembly located in a receiving cavity surrounded by the sealing membrane and including at least one electrode body, The electrode assembly includes an electrode assembly body and two electrode lead members electrically connected to the electrode assembly body, which lead out current and have opposite polarities; an intermediate ring is further installed in the receiving cavity, the intermediate ring is located on a side of the electrode assembly where the electrode lead member is installed, and the intermediate ring is provided with an electrode lead hole through which the electrode lead member is led out; The intermediate ring has an accommodation space on a side facing the electrode assembly body, and the two intermediate rings are attached to opposite sides of the electrode assembly body in a first direction, and the opposite sides of the electrode assembly body in the first direction are fitted into the accommodation spaces of the corresponding intermediate rings, An electrolyte is poured into the accommodating cavity, a first reservoir recessed from an outer surface of the intermediate ring into the intermediate ring, the first reservoir communicating with the accommodating cavity;

2. 2. The battery cell assembly according to claim 1, wherein the portion between the intermediate ring and the sealing film is not sealed, thereby communicating the first reservoir with the receiving cavity.

3. 2. The battery cell assembly according to claim 1, wherein a plurality of reinforcing ribs are provided in the first storage tank, and the plurality of reinforcing ribs divide the first storage tank into a plurality of storage units.

4. 2. The battery cell assembly of claim 1, wherein the length of the electrode body extends along the first direction, the thickness of the electrode body extends along a second direction perpendicular to the first direction, the number of the first reservoirs is plural, and the first reservoirs are arranged along the second direction.

5. the electrode assembly includes the electrode assembly body and the electrode lead member electrically connected to the electrode assembly body, the length of the electrode assembly body extending along the first direction; 5. The battery cell assembly according to claim 1, wherein the two electrode lead members are respectively led out from opposite sides of the electrode assembly body in the first direction, the number of the intermediate rings is two, and the two intermediate rings are respectively located on opposite sides of the electrode assembly body in the first direction.

6. 6. The battery cell assembly of claim 5, wherein the length of the electrode body extends along the first direction, the thickness of the electrode body extends along a second direction perpendicular to the first direction, the electrode body assembly body includes at least two electrode bodies arranged along the second direction, and the electrode bodies are connected in series or in parallel.

7. 7. The battery cell assembly of claim 6, wherein two adjacent electrode bodies are connected in parallel, each electrode body including an electrode body body and two tabs electrically connected to the electrode body body and having opposite polarities, the two tabs being located on opposite sides of the electrode body body in the first direction, the tabs of the same polarity of the two adjacent electrode bodies being located on the same side in the first direction, and the two adjacent tabs of the same polarity being electrically connected to connect the two adjacent electrode bodies in parallel.

8. the electrode assembly body further includes a tab support member positioned between two adjacent tabs of the same polarity, the two adjacent tabs of the same polarity being electrically connected to the tab support member, respectively; 8. The battery cell assembly according to claim 7, wherein each electrode lead member is electrically connected to one of the tab support members located on one side of the electrode assembly body in the first direction.

9. The battery cell assembly according to claim 8 , wherein the connection portions between the tab support member and the electrode lead member and the tab are located on different surfaces of the tab support member.

10. 9. The battery cell assembly of claim 8, wherein the tab support member includes two first surfaces located on opposite sides, each of the two first surfaces facing two adjacent tabs of the same polarity, and each of the two adjacent tabs of the same polarity being directly bonded to the two first surfaces of the tab support member.

11. at least one tab support member connected to the electrode lead member is a rectangular member, the rectangular member including two of the first surfaces, a third surface located between the two first surfaces and facing the electrode body, and a fourth surface located opposite the third surfaces; 11. The battery cell assembly according to claim 10, wherein the tab support member electrically connected to the electrode lead member is connected to the electrode lead member via the fourth surface.

12. 9. The battery cell assembly of claim 8, wherein the interior of at least one of the tab support members is a hollow cavity.

13. A battery cell assembly comprising: a sealing membrane; and an electrode body assembly located in a receiving cavity surrounded by the sealing membrane and including at least one electrode body, The electrode assembly includes an electrode assembly body and two electrode lead members electrically connected to the electrode assembly body, which lead out current and have opposite polarities; an intermediate ring is further installed in the receiving cavity, the intermediate ring is located on a side of the electrode assembly where the electrode lead member is installed, and the intermediate ring is provided with an electrode lead hole through which the electrode lead member is led out; The intermediate ring has an accommodation space on a side facing the electrode assembly body, and the two intermediate rings are attached to opposite sides of the electrode assembly body in a first direction, and the opposite sides of the electrode assembly body in the first direction are fitted into the accommodation spaces of the corresponding intermediate rings, An electrolyte is poured into the accommodating cavity, the electrode assembly includes the electrode assembly body and the electrode lead member electrically connected to the electrode assembly body, the length of the electrode assembly body extending along the first direction; the two electrode lead members are led out from opposite sides of the electrode assembly body in the first direction, the number of the intermediate rings is two, and the two intermediate rings are located on opposite sides of the electrode assembly body in the first direction, The length of the electrode body extends along the first direction, the thickness of the electrode body extends along a second direction perpendicular to the first direction, the electrode body assembly body includes at least two electrode bodies arranged along the second direction, and the electrode bodies are connected in series or in parallel; two adjacent electrode bodies are connected in parallel, and each electrode body includes an electrode body body and two tabs electrically connected to the electrode body body and having opposite polarities, the two tabs being located on opposite sides of the electrode body body in the first direction, and the tabs having the same polarity of the two adjacent electrode bodies are located on the same side in the first direction, and the two adjacent tabs having the same polarity are electrically connected, connecting the two adjacent electrode bodies in parallel; the electrode assembly body further includes a tab support member positioned between two adjacent tabs of the same polarity, the two adjacent tabs of the same polarity being electrically connected to the tab support member, respectively; Each electrode lead member is electrically connected to one of the tab support members located on one side of the electrode assembly body in the first direction, the interior of at least one of the tab support members is a hollow cavity; an opening is provided in at least one cavity wall of the hollow cavity, the hollow cavity communicates with an electrode lead-out hole in an intermediate ring located on the same side, and a second reservoir is formed in the hollow cavity.

14. 11. The battery cell assembly of claim 10, wherein at least one of the tab support members is a U-shaped member, an opening of the U-shaped member is oriented parallel to the first direction, the U-shaped member includes two opposing side walls and a bottom wall located between the two opposing side walls, and outer surfaces of the two opposing side walls are the two first surfaces, respectively.

15. 15. The battery cell assembly according to claim 14, wherein an opening of the U-shaped member faces the electrode body, and a tab support member electrically connected to the electrode lead member is connected to the electrode lead member through the bottom wall.

16. 15. The battery cell assembly according to claim 14, wherein the openings of the U-shaped members face the intermediate ring located on the same side, and a tab support member electrically connected to the electrode lead member is connected to the electrode lead member through one of the side walls.

17. A battery cell assembly comprising: a sealing membrane; and an electrode body assembly located in a receiving cavity surrounded by the sealing membrane and including at least one electrode body, The electrode assembly includes an electrode assembly body and two electrode lead members electrically connected to the electrode assembly body, which lead out current and have opposite polarities; an intermediate ring is further installed in the receiving cavity, the intermediate ring is located on a side of the electrode assembly where the electrode lead member is installed, and the intermediate ring is provided with an electrode lead hole through which the electrode lead member is led out; The intermediate ring has an accommodation space on a side facing the electrode assembly body, and the two intermediate rings are attached to opposite sides of the electrode assembly body in a first direction, and the opposite sides of the electrode assembly body in the first direction are fitted into the accommodation spaces of the corresponding intermediate rings, An electrolyte is poured into the accommodating cavity, the electrode assembly includes the electrode assembly body and the electrode lead member electrically connected to the electrode assembly body, the length of the electrode assembly body extending along the first direction; the two electrode lead members are led out from opposite sides of the electrode assembly body in the first direction, the number of the intermediate rings is two, and the two intermediate rings are located on opposite sides of the electrode assembly body in the first direction, The length of the electrode body extends along the first direction, the thickness of the electrode body extends along a second direction perpendicular to the first direction, the electrode body assembly body includes at least two electrode bodies arranged along the second direction, and the electrode bodies are connected in series or in parallel; two adjacent electrode bodies are connected in parallel, and each electrode body includes an electrode body body and two tabs electrically connected to the electrode body body and having opposite polarities, the two tabs being located on opposite sides of the electrode body body in the first direction, and the tabs having the same polarity of the two adjacent electrode bodies are located on the same side in the first direction, and the two adjacent tabs having the same polarity are electrically connected, connecting the two adjacent electrode bodies in parallel; the electrode assembly body further includes a tab support member positioned between two adjacent tabs of the same polarity, the two adjacent tabs of the same polarity being electrically connected to the tab support member, respectively; Each electrode lead member is electrically connected to one of the tab support members located on one side of the electrode assembly body in the first direction, the tab support member includes two first surfaces located opposite to each other, each of the two first surfaces facing two adjacent tabs of the same polarity, and each of the two adjacent tabs of the same polarity being directly bonded to the two first surfaces of the tab support member; At least one of the tab support members is a U-shaped member, an opening of the U-shaped member is oriented parallel to the first direction, the U-shaped member includes two opposing side walls and a bottom wall located between the two opposing side walls, and outer surfaces of the two opposing side walls are the two first surfaces, respectively; a second reservoir tank formed in the internal cavity of the U-shaped member by communicating with an electrode lead-out hole in the intermediate ring located on the same side of the U-shaped member.

18. A battery cell assembly comprising: a sealing membrane; and an electrode body assembly located in a receiving cavity surrounded by the sealing membrane and including at least one electrode body, The electrode assembly includes an electrode assembly body and two electrode lead members electrically connected to the electrode assembly body, which lead out current and have opposite polarities; an intermediate ring is further installed in the receiving cavity, the intermediate ring is located on a side of the electrode assembly where the electrode lead member is installed, and the intermediate ring is provided with an electrode lead hole through which the electrode lead member is led out; The intermediate ring has an accommodation space on a side facing the electrode assembly body, and the two intermediate rings are attached to opposite sides of the electrode assembly body in a first direction, and the opposite sides of the electrode assembly body in the first direction are fitted into the accommodation spaces of the corresponding intermediate rings, An electrolyte is poured into the accommodating cavity, the electrode assembly includes the electrode assembly body and the electrode lead member electrically connected to the electrode assembly body, the length of the electrode assembly body extending along the first direction; the two electrode lead members are led out from opposite sides of the electrode assembly body in the first direction, the number of the intermediate rings is two, and the two intermediate rings are located on opposite sides of the electrode assembly body in the first direction, The length of the electrode body extends along the first direction, the thickness of the electrode body extends along a second direction perpendicular to the first direction, the electrode body assembly body includes at least two electrode bodies arranged along the second direction, and the electrode bodies are connected in series or in parallel; two adjacent electrode bodies are connected in parallel, and each electrode body includes an electrode body body and two tabs electrically connected to the electrode body body and having opposite polarities, the two tabs being located on opposite sides of the electrode body body in the first direction, and the tabs having the same polarity of the two adjacent electrode bodies are located on the same side in the first direction, and the two adjacent tabs having the same polarity are electrically connected, connecting the two adjacent electrode bodies in parallel; the electrode assembly body further includes a tab support member positioned between two adjacent tabs of the same polarity, the two adjacent tabs of the same polarity being electrically connected to the tab support member, respectively; Each electrode lead member is electrically connected to one of the tab support members located on one side of the electrode assembly body in the first direction, a first insulating spacer disposed between the tab support member and the electrode body;

19. Both ends of the electrode body that are opposite in the first direction are V-shaped end faces with tips protruding outward, and the two tabs of each electrode body are respectively located at the tips of the two V-shaped end faces, and a V-shaped space is formed between the V-shaped end faces at the same end in the first direction of the two adjacent electrode body bodies, 20. The battery cell assembly of claim 18, wherein the insulating spacer is a V-shaped member that matches the shape of the V-shaped space, and the V-shaped member is fitted within the V-shaped space.

20. 20. The battery cell assembly according to claim 19, wherein the V-angle of the V-shaped space is 90 to 150 degrees.

21. 20. The battery cell assembly according to claim 18, wherein the insulating spacer and the tab support member are secured together by a snap fit.

22. A battery comprising a case and at least one battery cell assembly sealed in the case, the battery cell assembly being the battery cell assembly according to any one of claims 1 to 21.

23. A battery pack comprising a plurality of batteries according to claim 22.

24. 24. A motor vehicle comprising the battery of claim 22 or the battery pack of claim 23.

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