Battery cell assembly, battery module and battery pack

Abstract

The utility model provides a battery cell assembly, a battery module and a battery pack, the battery cell assembly comprises: a battery cell, the battery cell comprises a battery cell main body, a first end face of the battery cell main body is provided with a protruding pole, and an insulating ring is arranged between the first end face and the pole; and the sealing insulation unit comprises a sealing insulation cover connected between the first end face and the pole in a sealing manner, and the sealing insulation cover covers the insulation ring. According to the battery cell assembly, the battery module and the battery pack provided by the invention, the sealing insulation cover is connected to the battery cell in a sealing manner, so that an additional protection function structure can be formed above the insulation ring. When the battery cell is in thermal runaway, high-temperature gas in the battery cell main body can be blocked by the sealing insulating cover even if being discharged from the molten insulating ring, so that the high-temperature gas in the battery cell can be prevented from being discharged outwards from the first end surface where the pole is positioned, and the pole is prevented from flying outwards; and the damage of high-temperature gas to the pole and an external circuit is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, and in particular to a battery cell assembly, a battery module and a battery pack. BACKGROUND

[0002] Generally, a battery cell (including a cylindrical battery cell and a prismatic battery cell) includes a shell for forming a battery cell body, and a pole post protruding from the shell. The shell can serve as a negative electrode of the battery cell, and the pole post can serve as a positive electrode of the battery cell. In order to prevent short circuit between the positive electrode and the negative electrode of the battery cell, an insulating ring surrounding the pole post is arranged between the pole post and the shell.

[0003] When the battery cell experiences thermal runaway, high-temperature gas inside the battery cell can be discharged outward from the position where the insulating ring is arranged, causing a safety hazard. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application aims to provide a battery cell assembly, a battery module and a battery pack to at least partially solve the problem of safety hazard of the battery pack caused by discharge of high-temperature gas near the pole post of the battery cell.

[0005] To achieve the above-mentioned purpose, the present application provides a battery cell assembly in a first aspect, which comprises: a battery cell including a battery cell body, a first end surface of the battery cell body being provided with a protruding pole post, and an insulating ring being arranged between the first end surface and the pole post; and a sealing and insulating unit including a sealing and insulating cover sealingly connected between the first end surface and the pole post, and covering the insulating ring.

[0006] Optionally, the insulating ring is annular and is embedded in the first end surface, and the sealing and insulating cover is sealingly connected with the battery cell on the inner side and the outer side of the insulating ring in the radial direction of the insulating ring, so as to form a sealing space covering the insulating ring with the sealing and insulating cover and the battery cell.

[0007] Optionally, the sealing and insulating cover is sealingly connected with the first end surface of the battery cell body to form a continuous annular outer sealing area on the outer side of the insulating ring, and the sealing and insulating cover is sealingly connected with the pole post to form a continuous annular inner sealing area on the inner side of the insulating ring.

[0008] Optionally, the end of the first end surface where the pole post protrudes is defined as the top end of the pole post, and the sealing and insulating cover is sealingly connected with the top end of the pole post to form the inner sealing area.

[0009] Optionally, the sealing and insulating cover is provided with a relief through hole near the top end of the pole post, and the top end of the pole post is exposed through the relief through hole.

[0010] Optionally, the sealing and insulating cover defines a bottom end near an end of the first end face, and a sealing flange is arranged along an outer edge of the bottom end, the sealing flange and the bottom end of the sealing and insulating cover are both in sealing connection with the first end face to form the outer sealing area.

[0011] Optionally, the sealing and insulating cover is of a high-temperature-resistant structure.

[0012] Optionally, the sealing and insulating cover is in sealing connection with the battery cell through a high-temperature-resistant connecting layer.

[0013] Optionally, the battery cell assembly includes at least two battery cells, and the sealing and insulating unit further includes a connecting beam connected with the at least two sealing and insulating covers.

[0014] Optionally, the connecting beam is connected with the first end face of the battery cell body.

[0015] Optionally, the battery cell assembly further includes a current collecting tab, the pole is in electrical connection with the current collecting tab, an insulating layer is connected to a side of the current collecting tab facing the battery cell body, and the sealing and insulating cover is connected with the insulating layer.

[0016] Optionally, the insulating layer and the sealing and insulating cover are configured as an integrally formed structure.

[0017] Optionally, the battery cell includes a cylindrical battery cell.

[0018] Based on the same inventive concept, the second aspect of the present application further provides a battery module including the battery cell assembly as described in the first aspect.

[0019] Based on the same inventive concept, the third aspect of the present application further provides a battery pack including the battery cell assembly as described in the first aspect.

[0020] As can be seen from the above, the battery cell assembly, the battery module and the battery pack provided by the present application can form an additional protection function structure above the insulating ring by sealing and connecting the sealing and insulating cover to the battery cell. When the battery cell is in thermal runaway, the high-temperature gas inside the battery cell body will be blocked by the sealing and insulating cover even if it is discharged from the melted insulating ring, which can prevent the high-temperature gas inside the battery cell from being discharged outward from the first end face where the pole is located and prevent the pole from flying outward, thereby reducing the damage caused by the high-temperature gas to the pole and the external circuit. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0022] Figure 1 A perspective view of an electric cell according to an embodiment of the present application;

[0023] Figure 2 A top view of an electric cell according to an embodiment of the present application;

[0024] Figure 3 A partial view of an electric cell assembly according to an embodiment of the present application;

[0025] Figure 4 A partial top view of an electric cell assembly according to an embodiment of the present application;

[0026] Figure 5 A cross-sectional view of A-A in FIG. 4; Figure 4

[0027] A partial exploded view of an electric cell assembly according to an embodiment of the present application; Figure 6

[0028] A structural view of a sealing and insulating cover of an electric cell assembly according to an embodiment of the present application; Figure 7

[0029] A partial view of another structure of an electric cell assembly according to an embodiment of the present application; Figure 8

[0030] A partial front view of another structure of an electric cell assembly according to an embodiment of the present application. Figure 9 Explanation of reference signs:

[0031] 100, electric cell; 110, electric cell body; 111, first end face; 120, pole; 130, insulating ring; 140, explosion-proof valve;

[0032] 200, sealing and insulating unit; 210, sealing and insulating cover; 211, avoiding through hole; 212, sealing and insulating cover; 220, connecting beam;

[0033] 300, sealing space;

[0034] 400, outer sealing area; 500, inner sealing area; 600, insulating layer; 700, current collecting tab.

[0035] DETAILED DESCRIPTION

[0036] ​In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] It should be noted that the relative arrangement of the components, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0038] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the scope of the application or its application or uses.

[0040] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by those skilled in the art to which the embodiments of the present application belong. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, number or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The electric core 100 can include a cylindrical electric core and / or a square shell electric core, and a cylindrical electric core is exemplarily described.

[0042] As Figure 1 , Figure 1 A perspective view of the electric core 100 is shown, which can include a cylindrical electric core body 110 including a shell and a bare electric core mounted in the shell. The top end of the electric core body 110 is provided with a pole 120, part of which is located inside the shell to be electrically connected with the bare electric core, and the other part extends out of the top end of the electric core body 110.

[0043] As Figure 2 , Figure 2A schematic top view of the battery cell 100 is shown. In order to maintain insulation between the pole 120 and the shell of the battery cell body 110, an insulating ring 130 (or insulating pad) is provided between the pole 120 and the shell. The insulating ring 130 surrounds the pole 120 and separates the pole 120 and the shell along the circumference of the pole 120.

[0044] For example, Figure 2 The insulating ring 130 can be in contact with the outer circumferential wall of the pole 120 .

[0045] Taking the battery cell 100 used in a battery pack as an example, the poles 120 of multiple battery cells 100 in the battery pack can be simultaneously connected to the integrated busbar (CCS) of the cell. When a single battery cell 100 experiences thermal runaway, high-temperature gas generated inside the casing, carrying fine particles, needs to be discharged from the casing. If the high-temperature gas and fine particles enter the connection area between the pole 120 and the integrated busbar, arcing may occur at the top of the battery cell body 110, causing thermal runaway in other normal battery cells 100 and causing heat spread.

[0046] In order to improve the above safety hazards, Figure 1 An explosion-proof valve 140 is provided at the bottom of the battery cell body 110. When the battery cell 100 experiences thermal runaway, the high-temperature gas generated inside it can drive the explosion-proof valve 140 to open, so that the high-temperature gas is discharged from the bottom of the battery cell body 110, avoiding adverse effects on the pole 120 at the top of the battery cell body 110, making the battery cell 100 a thermoelectric separation structure.

[0047] However, the applicant's research has discovered that when thermal runaway occurs in the battery cell 100, there is a risk of melting the insulating ring 130 between the terminal 120 and the housing. After the insulating ring 130 melts, a gap may appear where the insulating ring 130 originally sat, connecting it to the interior of the housing. High-temperature gases within the housing can escape through this gap and out the top of the battery cell body 110, leading to the aforementioned safety hazard.

[0048] In order to solve the above problems, Figure 3 , Figure 3 The battery cell assembly provided in this embodiment includes a battery cell 100 and a sealed insulating unit 200. The battery cell 100 includes a battery cell body 110. The first end surface 111 of the battery cell body 110 is provided with a protruding pole 120. Figure 4 , Figure 4 FIG1 shows a schematic diagram of a partial top view of a cell assembly, wherein the sealed insulating unit 200 includes a sealed insulating cover 210 sealedly connected between the first end face 111 and the pole 120. Figure 5 , Figure 5 Shown Figure 4A cross-sectional view of the middle A-A section, the sealing and insulating cover 210 covers the insulating ring 130.

[0049] The sealing and insulating cover 210 can be integrally formed to ensure its own sealing performance.

[0050] The first end surface 111 can be the top surface of the battery cell body 110.

[0051] The sealing and insulating cover 210 and the battery cell 100 can be connected by sealing glue or other means.

[0052] The sealing and insulating cover 210 can be connected to the first end surface 111 or the pole 120. Since the sealing and insulating cover 210 is made of insulating material, even if the sealing and insulating cover 210 is connected to both the battery cell body 110 and the pole 120, it will not cause the battery cell 100 to be short-circuited.

[0053] The sealing and insulating cover 210 is located above the first end surface 111 and covers the insulating ring 130, which can form an additional protective function structure above the insulating ring 130. When the battery cell 100 is in thermal runaway, even if the insulating ring 130 is burned and melted, the sealing and insulating cover 210 can block the high-temperature gas overflowing from the insulating ring 130 and prevent the pole 120 from flying outwards, thereby reducing the impact of the high-temperature gas on the electrical connection between the pole 120 and the external circuit.

[0054] The battery cell assembly provided by the embodiments of the present application can form an additional protective function structure above the insulating ring 130 by sealing and connecting the sealing and insulating cover 210 to the battery cell 100. When the battery cell 100 is in thermal runaway, the high-temperature gas inside the battery cell body 110 will be blocked by the sealing and insulating cover 210 even if it is discharged from the burned and melted insulating ring 130, which can prevent the high-temperature gas inside the battery cell 100 from being discharged outwardly from the first end surface 111 where the pole 120 is located, thereby reducing the damage caused by the high-temperature gas to the pole 120 and the external circuit.

[0055] As Figure 2 , the insulating ring 130 is annular around the pole 120 and is embedded in the first end surface 111. As Figure 5 , along the radial direction of the insulating ring 130 (e.g. Figure 5 , the sealing and insulating cover 210 and the battery cell 100 are sealingly connected on the inner side and the outer side of the insulating ring 130, so that the sealing and insulating cover 210 and the battery cell 100 form a sealing space 300 covering the insulating ring 130.

[0056] The sealing and insulating cover 210 is connected to the electric core 100 on both sides of the insulating ring 130 to completely cover the insulating ring 130 and form a sealed space 300 above the insulating ring 130. When the insulating ring 130 is burned and the high-temperature gas in the electric core body 110 is discharged from the original position of the insulating ring 130, the sealing and insulating cover 210 limits the high-temperature gas in the sealed space 300, further prevents the high-temperature gas from being discharged, and further protects the electrical connection between the pole 120 and the external circuit.

[0057] As Figure 5 In some embodiments, the sealing and insulating cover 210 is connected to the first end surface 111 of the electric core body 110 to form a continuous annular outer sealing area 400 on the outside of the insulating ring 130, and the sealing and insulating cover 210 is connected to the pole 120 to form a continuous annular inner sealing area 500 on the inside of the insulating ring 130.

[0058] For example, the sealing and insulating cover 210 can be connected to the end of the pole 120, and the end of the pole 120 can have a relatively flat surface. The sealing and insulating cover 210 connected to the flat surface can ensure that the inner sealing area 500 has good sealing effect. Of course, the sealing and insulating cover 210 can also be connected to the circumferential side wall of the pole 120 to reduce the shielding of the end of the pole 120 by the sealing and insulating cover 210, so that the end of the pole 120 can have a larger blank area to facilitate the electrical connection between the pole 120 and the external circuit.

[0059] For example, based on the radial cross-sectional shape of the pole 120, the outer sealing area 400 and the inner sealing area 500 can be a polygonal annular area or a circular annular area.

[0060] The outer sealing area 400 and the inner sealing area 500 are both continuous and closed annular areas, which can avoid forming a channel connecting the sealed space 300 and the outside along the radial direction of the pole 120, so that the high-temperature gas in the sealed space 300 is limited between the outer sealing area 400 and the inner sealing area 500, effectively preventing the high-temperature gas from being discharged through the gap between the sealing and insulating cover 210 and the electric core 100.

[0061] As Figure 5 In some embodiments, the end of the pole 120 protruding from the first end surface 111 is defined as the top end of the pole 120, and the sealing and insulating cover 210 is connected to the top end of the pole 120 to form the inner sealing area 500.

[0062] For example, the center of the inner sealing area 500 coincides with the center of the top end of the pole 120 to ensure that the inner sealing area 500 is uniformly distributed around the top end of the pole 120, further ensuring the sealing performance of the inner sealing area 500 at each position.

[0063] The sealing connection between the sealing insulating cover 210 and the pole 120 is achieved by adhesive connection as an example for description.

[0064] When fluid adhesive is used, the top of the pole 120 can have a relatively flat surface. After the fluid adhesive is applied to the top of the pole 120, it can be better maintained in the applied position. After the fluid adhesive is cured, the sealing insulation cover 210 and the pole 120 can have better sealing performance.

[0065] At the same time, the inner sealing area 500 formed at the top of the pole 120 can also control the area of ​​the inner sealing area 500 by adjusting the diameter of the top opening of the sealing insulating cover 210, thereby improving the sealing effect on the inside of the insulating ring 130. The adjustment cost is low, which is conducive to mass production.

[0066] like Figure 6 , Figure 6 A partial explosion diagram of a battery cell assembly is shown. In some embodiments, the sealing insulation cover 210 is provided with an avoidance through-hole 211 near the top of the pole 120 , and the top of the pole 120 is exposed through the avoidance through-hole 211 .

[0067] Exemplarily, the radial cross-sectional shape of the avoidance through hole 211 is the same as the shape of the top surface of the pole 120 , and the aperture of the avoidance through hole 211 is smaller than the diameter of the top surface of the pole 120 .

[0068] For example, the external circuit and the exposed portion of the top end of the pole 120 can be electrically connected by welding or connecting with conductive glue.

[0069] The avoidance through hole 211 is provided on the sealing insulation cover 210 so that a portion of the top surface of the pole 120 is exposed, so as to facilitate electrical connection between the pole 120 and an external circuit.

[0070] like Figure 5 In some embodiments, the end of the sealing insulation cover 210 close to the first end face 111 is defined as the bottom end of the sealing insulation cover 210, and the sealing insulation cover 210 is provided with a sealing fold 212 along the outer edge circumference of the bottom end. The sealing fold 212 and the bottom end of the sealing insulation cover 210 are both sealed with the first end face 111 to form an outer sealing area 400.

[0071] For example, Figure 7 , Figure 7A structural schematic diagram of the sealing insulating cover 210 is shown. The bottom surface of the sealing fold 212 can be flush with the bottom end surface of the sealing insulating cover 210 to ensure that the gap distance between the sealing fold 212 and the first end face 111 is the same as the gap distance between the bottom end of the sealing insulating cover 210 and the first end face 111. When the sealing insulating cover 210 is sealed and connected to the first end face 111, a structural layer with relatively uniform thickness and good sealing performance can be formed.

[0072] by Figure 5 and Figure 6 The structure of the sealing insulating cover 210 will be further described using the illustrated structure as an example. The sealing insulating cover 210 comprises an annular sheet-like structure positioned above the top of the pole 120. This sheet-like structure is sealedly connected to the top of the pole 120 to form an inner sealed area 500. A cylindrical structure extending toward the first end face 111 is disposed along the outer edge of the sheet-like structure. The end of the cylindrical structure, distal from the sheet-like structure, forms the bottom end of the sealing insulating cover 210. In order to increase the area of ​​the outer sealing area 400, this embodiment provides a sealing fold 212 along the outer edge of the bottom end of the sealing insulation cover 210. Since the sealing fold 212 and the bottom end of the sealing insulation cover 210 are both sealed and connected to the first end face 111, the outer sealing area 400 includes not only the area covered by the positive projection of the bottom end of the sealing insulation cover 210 on the first end face 111, but also the area covered by the positive projection of the sealing fold 212 on the first end face 111. The larger area of ​​the outer sealing area 400 helps to improve the sealing effect on the outside of the insulating ring 130 and prevent the high-temperature gas inside the sealed space 300 from being discharged.

[0073] In some embodiments, the sealing insulating cover 210 is sealed and connected to the battery cell 100 via a high temperature resistant connection layer.

[0074] Illustratively, the high temperature resistant connection layer may be a structural layer formed by a high temperature resistant solid adhesive or a structural layer formed by curing a high temperature resistant fluid adhesive.

[0075] In this embodiment, in addition to being able to form a reliable sealing structure under normal temperature conditions, the outer sealing area 400 and the inner sealing area 500 can also have a good sealing effect in a high-temperature environment when high-temperature gas is contained in the sealed space 300 or the first end face 111 is heated, so as to prevent high-temperature gas from being discharged from the sealed space 300.

[0076] In some embodiments, the sealing insulating cover 210 is a high temperature resistant structure.

[0077] For example, the sealing insulating cover 210 may be made of mica or high-temperature resistant silicone rubber.

[0078] In addition to ensuring the sealing performance at the outer sealing area 400 and the inner sealing area 500, it is also necessary to ensure that the sealing insulation cover 210 itself can still maintain good sealing performance under high-temperature annular. Therefore, in the present embodiment, the sealing insulation cover 210 can be made of a high-temperature resistant material to avoid the high-temperature gas from being discharged from the sealing space 300 due to the deformation or melting of the sealing insulation cover 210 in a high-temperature environment.

[0079] As Figure 8 , Figure 8 A partial schematic view of another structure of the battery cell assembly is shown, which, in some embodiments, includes at least two battery cells 100, and the sealing insulation unit 200 further includes a connecting beam 220 connected with the at least two sealing insulation covers 210.

[0080] Illustratively, the material of the connecting beam 220 can be the same as or different from that of the sealing insulation cover 210.

[0081] Illustratively, the connecting beam 220 and the sealing insulation cover 210 can be connected by means of one-piece forming, welding, insertion, clamping, adhesive bonding, fastener connection, etc.

[0082] Illustratively, the connecting beam 220 can be connected with at least one of the circumferential side wall of the cylindrical structure of the sealing insulation cover 210, the circumferential side wall of the sealing flange 212, and the top plane of the sealing flange 212.

[0083] In combination Figure 5 , along the radial direction of the battery cell body 110 (e.g., the X direction in Figure 5 , there is a gap (which is used to form the sealing space 300) between the sealing insulation cover 210 and the circumferential side wall of the pole 120, so there is a possibility of misalignment when the sealing insulation cover 210 is installed on the battery cell 100. If the sealing insulation cover 210 and the battery cell 100 are misaligned, it can cause part of the insulation ring 130 to be exposed to the sealing insulation cover 210, thereby causing the sealing insulation cover 210 to fail to seal.

[0084] To avoid the above problems, it is necessary to ensure that the battery cell 100 and the sealing insulation cover 210 maintain a predetermined position. For the sealing insulation cover 210, the present embodiment connects at least two sealing insulation covers 210 into one whole body through the connecting beam 220, which can play a certain limiting role on the sealing insulation cover 210 compared to the independent arrangement of multiple sealing insulation covers 210, helping to avoid misalignment of the sealing insulation cover 210 and the battery cell 100, and ensuring the sealing effect of the sealing insulation cover 210.

[0085] As Figure 8 , in some embodiments, the connecting beam 220 is connected with the first end surface 111 of the battery cell body 110.

[0086] For example, the connection between the connecting beam 220 and the first end face 111 can be the same as the connection between the sealing and insulating cover 210 and the first end face 111.

[0087] For example, in order to facilitate the connection between the connecting beam 220 and the first end face 111, the connecting beam 220 can be connected with the circumferential side wall of the sealing and insulating cover 210, so that the connecting beam 220 is close to the first end face 111.

[0088] The connecting beam 220 is connected with the first end face 111 of the battery cell body 110, and the force generated between the two helps to keep the sealing and insulating cover 210 and the first end face 111 in reliable sealing connection.

[0089] As Figure 9 , Figure 9 Part of the front view schematic diagram of another structure of the battery cell assembly is shown, and in some embodiments, the battery cell assembly further comprises a current collecting tab 700, and the pole 120 is electrically connected with the current collecting tab 700; The side of the current collecting tab 700 towards the battery cell body 110 is connected with an insulating layer 600, and the sealing and insulating cover 210 is connected with the insulating layer 600.

[0090] For example, the insulating layer 600 and the sealing and insulating cover 210 are configured as an integral molding structure. Of course, the sealing and insulating cover 210 and the insulating layer 600 can also be connected by welding, insertion, clamping, adhesive connection or fastener connection and the like.

[0091] For example, the current collecting tab 700 and the exposed part of the top of the pole 120 can be electrically connected by welding or by conductive adhesive.

[0092] It can be understood that the current collecting tab 700 needs to be connected with multiple battery cells 100, so the area of the current collecting tab 700 is large, and accordingly, the connection area between the insulating layer 600 and the current collecting tab 700 is also large, so the connection reliability between the two is good. At the same time, the current collecting tab 700 is connected with the poles 120 of each battery cell 100, so the stability of the relative position between the current collecting tab 700 and the poles 120 of each battery cell 100 is good, and the probability of plane dislocation is low. Therefore, in this embodiment, the sealing and insulating cover 210 and the insulating layer 600 are connected as a whole, and when the stability of the relative position between the current collecting tab 700 and the battery cell 100, and the stability of the relative position between the current collecting tab 700 and the insulating layer 600 are good, the stability of the relative position between the sealing and insulating cover 210 connected with the insulating layer 600 and the battery cell 100 connected with the current collecting tab 700 is also good. Further ensure that the battery cell 100 and the sealing and insulating cover 210 can maintain the preset position, avoid dislocation between the battery cell 100 and the sealing and insulating cover 210, and help to ensure the sealing performance of the sealing and insulating cover 210.

[0093] Based on the same inventive concept, in combination with the description of the battery cell assembly in the above various embodiments, the battery module has the corresponding technical effects of the battery cell assembly in the above various embodiments, which will not be described here.

[0094] A battery module comprises the battery cell assembly in the above various embodiments.

[0095] Based on the same inventive concept, in combination with the description of the battery cell assembly in the above various embodiments, the battery module has the corresponding technical effects of the battery cell assembly in the above various embodiments, which will not be described here.

[0096] A battery module comprises the battery cell assembly in the above various embodiments.

[0097] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the acts or steps in a claim may be performed in an order different than the order described in the embodiments above and still achieve the desired result. In addition, the process depicted in the figures does not necessarily require the particular order shown, or sequential order to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous.

[0098] Each of the embodiments in the present application is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0099] The description of the present application is given for the purpose of illustration and description, and is not exhaustive or limiting to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the present application and its practical application, and to enable others skilled in the art to understand the present application in order to design various embodiments with various modifications for specific use cases.

[0100] Those of ordinary skill in the art will understand that the discussion of any embodiment above is merely exemplary and is not intended to suggest that the scope of the present application is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, steps can be implemented in any order, and there are many other variations of the aspects of the embodiments of the present application as described above, which are not provided in detail.

[0101] While the application has been described in connection with specific embodiments thereof, it will be understood that many modifications, substitutions, and changes will be apparent to those of ordinary skill in the art from the foregoing description.

[0102] It is intended to cover all alternatives, modifications, and variations of this application falling within the scope of the application. Accordingly, any and all such alternatives, modifications and variations should be included within the scope of the present application.

Claims

1. An electrochemical cell assembly, comprising: The application relates to an electric core assembly. The electric core comprises an electric core body, a first end surface of the electric core body is provided with a protruding pole, and an insulating ring is arranged between the first end surface and the pole. The sealing and insulating unit comprises a sealing and insulating cover which is sealingly connected between the first end surface and the pole and covers the insulating ring.

2. The cell assembly of claim 1, wherein, The insulating ring is annular and is embedded in the first end surface. In the radial direction of the insulating ring, the sealing and insulating cover and the electric core are sealingly connected on the inner side and the outer side of the insulating ring, so that the sealing and insulating cover and the electric core enclose a sealing space which covers the insulating ring.

3. The cell assembly of claim 2, wherein, The sealing and insulating cover is sealingly connected with the first end surface of the electric core body to form a continuous annular outer sealing area on the outer side of the insulating ring; and the sealing and insulating cover is sealingly connected with the pole to form a continuous annular inner sealing area on the inner side of the insulating ring.

4. The cell assembly of claim 3, wherein, The end of the pole which protrudes from the first end surface is defined as the top end of the pole, and the sealing and insulating cover is sealingly connected with the top end of the pole to form the inner sealing area.

5. The cell assembly of claim 4, wherein, The sealing and insulating cover is provided with a avoiding through hole near the top end of the pole, and the top end of the pole is exposed through the avoiding through hole.

6. The cell assembly of claim 3, wherein, The end of the sealing and insulating cover near the first end surface is defined as the bottom end of the sealing and insulating cover, and the sealing and insulating cover is provided with a sealing flange along the outer edge of the bottom end; the sealing flange and the bottom end of the sealing and insulating cover are both sealingly connected with the first end surface to form the outer sealing area.

7. The cell assembly of claim 1, wherein, The sealing and insulating cover is of a high-temperature-resistant structure.

8. The cell assembly of claim 1, wherein, The sealing and insulating cover is sealingly connected with the electric core through a high-temperature-resistant connecting layer.

9. The cell assembly of claim 1, wherein, The electric core assembly comprises at least two electric cores, and the sealing and insulating unit further comprises a connecting beam which is connected with the at least two sealing and insulating covers.

10. The cell assembly of claim 9, wherein, The connecting beam is connected with the first end surface of the electric core body.

11. The cell assembly of claim 9, wherein, The electric core assembly further comprises a current collecting tab, the pole is electrically connected with the current collecting tab, one side of the current collecting tab towards the electric core body is connected with an insulating layer, and the sealing and insulating cover is connected with the insulating layer.

12. The cell assembly of claim 11, wherein, The insulating layer and the sealing and insulating cover are configured as an integrally formed structure.

13. The cell assembly of claim 1, wherein, The electric core comprises a cylindrical electric core.

14. A battery module, characterized by The application relates to an electric core assembly.

15. A battery pack, characterized by The application relates to an electric core assembly.

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