Battery cell, battery assembly, battery pack, and electric device

Abstract

The application relates to the technical field of batteries, and discloses a battery monomer, a battery assembly, a battery pack and a power utilization device. The battery monomer comprises a shell, a pole core and a spacer ring. The shell has a shell body and a cover plate. The shell body defines a containing cavity with an opening. The cover plate is arranged at the opening. The pole core is arranged in the containing cavity and comprises a plurality of pole pieces stacked along a first direction and a plurality of tabs. The tabs are connected to the pole pieces. The spacer ring is arranged between at least one end of the pole core and the cover plate. One end of the spacer ring in the first direction is provided with a avoiding slot. The avoiding slot is arranged close to the end of the pole core in the first direction. The tabs pass through the avoiding slot and are electrically connected to the cover plate. The battery monomer of the embodiment can stretch the tabs in limited space. The tabs can be prevented from being broken. The occupied space of the tabs can be reduced. The volume utilization of the battery monomer is improved. The capacity of the battery monomer is improved. The number of the spacer rings is reduced. The structure of the battery monomer is simplified.

Description

TECHNICAL FIELD

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

[0002] In the prior art, in order to avoid the contact between the pole core and the cover plate, a spacer ring is usually arranged between the pole core and the cover plate.

[0003] However, the existing spacer ring structure is complex, resulting in high manufacturing cost of the battery monomer, and the existing spacer ring also causes the pole lug to need to be excessively bent after passing through the spacer ring, resulting in the risk of breakage of the pole lug, and also resulting in the pole lug occupying too much space of the battery monomer, affecting the capacity of the battery monomer. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the first object of the present application is to provide a battery monomer which not only has low manufacturing cost, but also allows the pole lug to be unfolded in limited space, solving the technical problems of the complex structure of the battery monomer and the excessive bending of the pole lug caused by the spacer ring in the prior art.

[0005] The second object of the present application is to provide a battery assembly having the above-mentioned battery monomer.

[0006] The third object of the present application is to provide a battery pack having the above-mentioned battery monomer or battery assembly.

[0007] The fourth object of the present application is to provide a power consumption device having the above-mentioned battery assembly or battery pack.

[0008] The battery monomer according to the embodiment of the present application comprises: a shell having a shell body and a cover plate, the shell body defining a receiving cavity with an opening, and the cover plate being arranged at the opening; a pole core arranged in the receiving cavity, the pole core comprising a plurality of pole pieces stacked in a first direction and a plurality of pole lugs connected to the pole pieces; and a spacer ring arranged between at least one end of the pole core and the cover plate, one end of the spacer ring in the first direction being provided with a avoiding slot, so that the avoiding slot is arranged close to the end of the pole core in the first direction, and the pole lug is arranged in the spacer ring through the avoiding slot and is electrically connected to the cover plate.

[0009] According to the battery cell of the embodiment of the present application, by arranging the avoiding groove at one end of the spacer ring in the first direction, the avoiding groove is arranged close to the end of the pole core in the first direction, so that when the pole lug is arranged through the avoiding groove in the spacer ring, the pole lug is bent into a "C" type structure, and then the pole lug can be unfolded in a limited space, on the one hand, the pole lug can be prevented from being broken due to excessive bending to a certain extent, the service life of the pole lug is prolonged, and the working performance of the pole lug is improved, on the other hand, the pole lug can also be prevented from occupying a large space due to excessive bending, the purpose of reducing the space occupied by the pole lug is achieved, the arrangement space of the pole core is increased, and the capacity of the battery cell is improved; at the same time, by arranging the avoiding groove at one end of the spacer ring in the first direction, the pole lug can be avoided and fixed by using one spacer ring, the number of spacer rings arranged is simplified, the structure of the battery cell is simplified, and the manufacturing cost of the battery cell is reduced to a certain extent; in addition, by directly electrically connecting the pole lug and the cover plate, the arrangement of the lead-out sheet and the pole column in the traditional technology can be omitted, and the structure of the battery cell is simplified.

[0010] In some embodiments, the depth of the avoiding groove in the first direction is 0.1mm-5mm.

[0011] In some embodiments, the spacer ring comprises: a main body part, the main body part is provided with the avoiding groove at one end in the first direction; a support part, the support part is arranged at least one end of the main body part in the second direction, the support part is in abutment with the pole core and the cover plate, and the second direction intersects the first direction.

[0012] In some embodiments, the main body part and the cover plate and the main body part and the pole core are both formed with accommodating spaces, and the accommodating spaces are used for accommodating the pole lug.

[0013] In some embodiments, in the third direction, the thickness of the support part is greater than the thickness of the main body part, the main body part is arranged close to the middle part of the support part in the third direction, and the first direction, the second direction and the third direction intersect each other.

[0014] In some embodiments, in the third direction, the thickness of the main body part is 0.3mm-2mm.

[0015] In some embodiments, the support part has two, and the two support parts are arranged at opposite ends of the main body part in the second direction.

[0016] In some embodiments, the battery cell further comprises a side plate, the side plate is arranged at least one end of the pole core in the second direction, one side of the support part away from the main body part is provided with a fixing part, and the fixing part is fixedly connected with the side plate.

[0017] In some embodiments, the gasket is provided with an exhaust port, which is arranged opposite to the explosion-proof valve of the battery cell.

[0018] In some embodiments, the tab is welded to the cover plate.

[0019] In some embodiments, the shell is electrically connected to the cover plate.

[0020] In some embodiments, the shell is provided with the cover plate at both ends in a third direction, and the shell is electrically connected to the two cover plates respectively, wherein the third direction intersects the first direction.

[0021] The battery assembly according to the embodiments of the present application comprises a plurality of the aforementioned battery cells.

[0022] The battery assembly according to the embodiments of the present application can improve the performance of the battery assembly to a certain extent by using the aforementioned battery cell.

[0023] The battery pack according to the embodiments of the present application comprises a plurality of the aforementioned battery cells or battery assemblies.

[0024] The battery pack according to the embodiments of the present application can improve the performance of the battery pack to a certain extent by using the aforementioned battery cell or battery assembly.

[0025] The electric device according to the embodiments of the present application comprises the aforementioned battery assembly or battery pack.

[0026] The electric device according to the embodiments of the present application can improve the performance of the electric device to a certain extent by using the aforementioned battery assembly or battery pack.

[0027] Additional aspects and advantages of the present application will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood by considering the following description, including the accompanying drawings, in which:

[0029] Figure 1 is an exploded view of the battery cell of some embodiments of the present application;

[0030] Figure 2 is a front view of the battery cell of some embodiments of the present application;

[0031] Figure 3 is a Figure 2 view along line A-A;

[0032] Figure 4 is a Figure 3Enlarged view of the middle region I;

[0033] Figure 5 Schematic view of a spacer for some embodiments of the present application;

[0034] Figure 6 Schematic view of a cover plate and explosion valve for some embodiments of the present application;

[0035] Figure 7 Schematic view of a cover plate for some other embodiments of the present application.

[0036] Reference Signs:

[0037] 1000, battery cell;

[0038] 100, electrode core; 120, tab;

[0039] 200, spacer;

[0040] 210, avoidance groove;

[0041] 220, main body portion; 221, accommodation space;

[0042] 230, support portion; 231, fixing member;

[0043] 240, exhaust port;

[0044] 300, side plate;

[0045] 400, explosion valve;

[0046] 500, outer shell;

[0047] 510, housing; 511, accommodation cavity;

[0048] 520, cover plate. DETAILED DESCRIPTION

[0049] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and letters indicate the same or like components throughout the several views. The embodiments described below are exemplary and are not intended to limit the present application, which can be applied in various forms and modifications.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0051] It should be noted that the sodium ion battery system contains only sodium ions and does not have lithium intercalation reaction and Li-Al alloying, and will not cause corrosion of the shell or explosion-proof valve at low potential, so the positive and negative electrodes of the battery cell can both use pure aluminum foil to carry current, and the structure of the battery cell can be either the shell with positive or the shell with negative.

[0052] Based on this, in combination with Figures 1-7 As shown in the drawings, the present application proposes a battery cell 1000, which is provided with a avoiding groove 210 on one end of the first direction of the spacer 200, so as to realize the setting of the avoiding groove 210 close to the end of the pole core 100 in the first direction. When the tab 120 is provided through the avoiding groove 210 in the spacer 200, the tab 120 is bent into a "C" type structure, so that the tab 120 can be stretched in a limited space. Compared with the "S" type structure in the prior art, on the one hand, the tab 120 can be prevented from breaking to a certain extent, prolonging the service life of the tab 120, and on the other hand, the bending space of the tab 120 can be saved, so that the tab 120 occupies a small space, which is beneficial to increase the arrangement space of the pole piece, thereby improving the volume utilization rate and capacity of the battery cell 1000. At the same time, through the above setting, one spacer 200 can be used to fix the tab 120, so as to change the structure of the two spacers in the prior art to one spacer 200, simplify the structure of the battery cell 1000, and reduce the manufacturing cost of the battery cell 1000 to a certain extent.

[0053] It can also be understood that the battery cell 1000 of the present application is based on the sodium battery system, and the shell 500 of the battery cell 1000 can be charged, and the insulation protection requirement of the tab 120 and the shell 500 is reduced.

[0054] The battery cell 1000 of the embodiment of the present application is described below with reference to the drawings of the specification.

[0055] As Figure 1As shown, a battery cell 1000 according to an embodiment of the present invention includes: a casing 500, an electrode core 100, and a spacer 200.

[0056] Among them, such as Figure 1 As shown, the outer casing 500 has a housing 510 and a cover plate 520. The housing 510 defines a receiving cavity 511 with an opening. The electrode core 100 is disposed within the receiving cavity 511, and the cover plate 520 is disposed at the opening. This effectively seals the electrode core 100 within the receiving cavity 511, preventing moisture and oxygen from the external air from entering the receiving cavity 511 through the opening. This, in turn, prevents moisture and oxygen from the external air from affecting the chemical reaction between the electrodes and electrolyte inside the electrode sheet of the electrode core 100, which helps maintain the stability of the internal chemical system of the battery cell 1000 and extends the service life of the battery cell 1000 to a certain extent.

[0057] In addition, by placing the electrode core 100 inside the receiving cavity 511, the electrode core 100 is placed inside the outer casing 500. The outer casing 510 can provide stable support for the electrode core 100. When the battery cell 1000 is subjected to an impact force, the electrode core 100 is prevented from shaking or displacing to a certain extent, thereby ensuring the positional stability of the electrode core 100 to a certain extent.

[0058] like Figure 1 As shown, the electrode core 100 includes multiple electrode sheets stacked along a first direction and multiple electrode tabs 120, with the electrode tabs 120 connecting the electrode sheets. It should be noted that the first direction here can be understood as... Figure 1 As shown in the Y direction, the electrode is the core electrode part of the electrode core 100. The electrode is divided into positive electrode and negative electrode. The positive electrode and negative electrode respectively undertake different electrochemical reactions and conduction functions. The active materials on the positive electrode and negative electrode complete the charging and discharging process through ion migration. The positive electrode and negative electrode are the basis for the electrode core 100 to realize energy storage and release.

[0059] Meanwhile, by connecting the tab 120 to the electrode plate, the tab 120 can reduce the difficulty of connecting the electrode plate to the external circuit, so that the current in the electrode plate can be transmitted to the external circuit or the current in the external circuit can be transmitted to the electrode plate, thereby forming a complete conductive path between the tab 120 and the external circuit.

[0060] Furthermore, since the active material mass of a single electrode is limited, by configuring the electrode core 100 to include multiple electrodes stacked along the first direction, the total mass of the active material on the positive and negative electrodes can be significantly increased, thereby improving the rated capacity of the electrode core 100. At the same time, by stacking, multiple electrodes can be arranged closely along the first direction, which to a certain extent reduces the ineffective space (such as air gaps) inside the battery cell 1000, thereby improving the volumetric energy density of the battery cell 1000.

[0061] In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0062] In combination Figures 1-5 As shown, the spacer ring 200 is arranged between at least one end of the pole core 100 and the cover plate 520, and one end of the spacer ring 200 in the first direction is provided with the avoiding groove 210, so that the avoiding groove 210 is arranged close to the end of the pole core 100 in the first direction, and the tab 120 is arranged through the spacer ring 200 through the avoiding groove 210 and is electrically connected with the cover plate 520.

[0063] Among them, by setting the avoiding groove 210 close to the end of the pole core 100 in the first direction, the tab 120 can be arranged through the spacer ring 200 through the end of the pole core 100, which is convenient for bending the tab 120 into a "C" type structure, avoiding excessive bending of the tab 120, and also allowing the tab 120 to expand in a limited space, on the one hand, it can prevent the tab 120 from breaking to a certain extent, prolong the service life of the tab 120, on the other hand, it can also reduce the occupied space of the tab 120, thereby improving the space utilization of the battery monomer 1000, which is beneficial to increase the arrangement space of the pole piece, thereby improving the capacity of the battery monomer 1000, thereby also improving the volume utilization of the battery monomer 1000 to ensure the working performance of the battery monomer 1000.

[0064] At the same time, through the above setting, one spacer ring 200 can be used to avoid and fix the tab 120, which is beneficial to simplify the number of spacer rings 200, thereby simplifying the structure of the battery monomer 1000, and reducing the manufacturing cost of the battery monomer 1000 to a certain extent.

[0065] In addition, by electrically connecting the tab 120 with the cover plate 520, when the battery monomer 1000 is charged or discharged, the tab 120 can transmit current to the cover plate 520, and the cover plate 520 transmits current to the external circuit, or the cover plate 520 transmits the current of the external circuit to the tab 120, thereby ensuring the working performance of the battery monomer 1000.

[0066] It should be noted that directly connecting the tab 120 with the cover plate 520 can eliminate the setting of the lead-out sheet and the pole in the traditional technology, thereby simplifying the structure of the battery monomer 1000, and reducing the production cost of the battery monomer 1000 to a certain extent.

[0067] It should be noted that the spacer ring 200 is arranged at least one end of the pole core 100, that is, the spacer ring 200 can be arranged on one end of the pole core 100, or the spacer ring 200 can be arranged on both ends of the pole core 100. When the spacer ring 200 is arranged on one end of the pole core 100, the tab 120 located at one end of the pole core 100 and facing the spacer ring 200 can be bent into a "C" shape through the spacer ring 200. When the spacer ring 200 is arranged on both ends of the pole core 100, the tabs 120 located at both ends of the pole core 100 can be bent into a "C" shape through the spacer ring 200.

[0068] That is, in the battery cell 1000 of the present application, the tab 120 located at one end of the pole core 100 can be bent into a "C" shape, or the tabs 120 located at both ends of the pole core 100 can be bent into a "C" shape.

[0069] From the above structure, it can be seen that the battery cell 1000 of the embodiment of the present application, by arranging the avoiding groove 210 at one end of the spacer ring 200 in the first direction, so that the avoiding groove 210 is arranged close to the end of the pole core 100 in the first direction, the first aspect can prevent the tab 120 from breaking and prolong the service life of the tab 120; the second aspect can reduce the occupied space of the tab 120, which is conducive to increasing the arrangement space of the pole piece and improving the capacity of the pole piece; the third aspect can simplify the number of spacer rings 200, thereby simplifying the structure of the battery cell 1000 and reducing the manufacturing cost of the battery cell 1000 to a certain extent.

[0070] It is also worth noting that by simplifying the number of spacer rings 200, the process of two spacer rings being buckled in the existing technology production line can be cancelled, thereby improving the production rhythm of the spacer ring 200 to a certain extent.

[0071] At the same time, by directly electrically connecting the tab 120 with the cover plate 520, the setting of the lead-out sheet and the pole in the traditional technology can be omitted, thereby simplifying the structure of the battery cell 1000, and thereby reducing the production cost of the battery cell 1000 to a certain extent.

[0072] It can be understood that compared with the prior art, the battery cell 1000 of the present application optimizes the structure of the spacer ring 200, which not only avoids excessive bending of the tab 120, but also simplifies the number of spacer rings 200, and can omit the setting of the lead-out sheet and the pole in the traditional technology, thereby simplifying the structure of the battery cell 1000.

[0073] In addition, by placing the spacer 200 between the electrode core 100 and the cover plate 520, the spacer 200 can support the electrode core 100 and ensure its positional stability to a certain extent. On the other hand, it can also isolate the electrode core 100 from the outer casing 500, thus avoiding direct contact between the electrode core 100 and the outer casing 500 and causing a short circuit, thereby ensuring the safety of the battery cell 1000 to a certain extent.

[0074] In some embodiments, the spacer 200 is made of materials such as polypropylene (PP) or polyethylene (PE). Since PP or PE both have certain strength and good insulation properties, the spacer 200 also has certain strength and good insulation properties.

[0075] In a specific example, the spacer 200 of this application is made of PP.

[0076] In some embodiments, the tab 120 is zero-position lead-out. It should be noted that zero-position lead-out of the tab 120 means that the tab 120 is directly welded and led out from the starting position of the stacked electrode sheets. Since the tab 120 in this application can directly contact the outer shell 500, the above arrangement can realize that the tab 120 is inserted into the spacer 200 through the clearance groove 210, which not only simplifies the number of spacers 200 used, but also allows the tab 120 to be spread out in a limited space.

[0077] In some embodiments, the depth of the clearance groove 210 in the first direction ranges from 0.1 mm to 5 mm. Here, the depth of the clearance groove 210 in the first direction can be understood as... Figure 5 As shown in Figure D, when the depth of the clearance groove 210 in the first direction is too narrow, the clearance groove 210 will not be able to accommodate multiple tabs 120, thus preventing the multiple tabs 120 from effectively passing through the clearance groove 210; when the depth of the clearance groove 210 in the first direction is too wide, the clamping effect of the spacer ring 200 on the tabs 120 will be poor, reducing the positional stability of the tabs 120.

[0078] In summary, this application sets the groove depth of the clearance groove 210 in the first direction to a range of 0.1mm to 5mm. This allows the clearance groove 210 to accommodate multiple tabs 120 while ensuring that the spacer ring 200 maintains a good clamping effect on the tabs 120, thereby ensuring that the tabs 120 have a good "C" shaped structure to a certain extent.

[0079] Specifically, the groove depth of the clearance groove 210 in the first direction is 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0080] In some embodiments, the groove depth of the avoidance groove 210 in the first direction is in the range of 0.1mm to 2mm. To further optimize the groove depth of the avoidance groove 210 and ensure the working performance of the avoidance groove 210.

[0081] In some embodiments, as shown in Figure 5 The spacer ring 200 includes a main body part 220 and a support part 230, and the main body part 220 is provided with an avoidance groove 210 at one end in the first direction. Thus, the avoidance groove 210 is provided at one end of the spacer ring 200 in the first direction, which reduces the difficulty of forming the avoidance groove 210, so that the tab 120 can pass through the main body part 220 and ensure the performance of the tab 120.

[0082] Optionally, as shown in Figure 5 The support part 230 is arranged at at least one end of the main body part 220 in the second direction, and the support part 230 is in abutting contact with the pole core 100 and the cover plate 520, and the second direction intersects the first direction. It should be noted that the second direction herein can be understood as the X direction shown in Figure 5 The support part 230 is arranged at at least one end of the main body part 220 in the second direction, which means that the support part 230 is arranged at one end of the main body part 220 in the second direction, and the other end is not provided with the support part 230, or the opposite ends of the main body part 220 in the second direction are both provided with the support part 230.

[0083] The support part 230 is arranged at at least one end of the main body part 220 in the second direction, which means that the support part 230 is arranged at one end of the main body part 220 in the second direction, and the other end is not provided with the support part 230, or the opposite ends of the main body part 220 in the second direction are both provided with the support part 230.

[0084] In addition, by abutting the spacer ring 200 between the pole core 100 and the cover plate 520, on the one hand, the pole core 100 and the cover plate 520 can be isolated, to some extent, to avoid short circuit caused by direct contact between the pole core 100 and the cover plate 520, thereby ensuring the safety of the battery monomer 1000 to some extent, on the other hand, the pole core 100 and the cover plate 520 can also be used to support the spacer ring 200, thereby improving the position stability of the spacer ring 200 and ensuring the working performance of the spacer ring 200 to some extent.

[0085] In some embodiments, as shown in Figure 5 The support part 230 has two, and the two support parts 230 are arranged at opposite ends of the main body part 220 in the second direction. Both of the two support parts 230 are in abutting contact with the pole core 100, which is conducive to improving the mutual support effect of the spacer ring 200 and the pole core 100. In some embodiments, as shown in Figure 5 The support part 230 has two, and the two support parts 230 are arranged at opposite ends of the main body part 220 in the second direction. Both of the two support parts 230 are in abutting contact with the pole core 100, which is conducive to improving the mutual support effect of the spacer ring 200 and the pole core 100.

[0086] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 4 , the accommodating space 221 is formed between the main body 220 and the cover plate 520 and between the main body 220 and the pole core 100, so that the tab 120 can be unfolded in the accommodating space 221, thereby ensuring the performance of the tab 120.

[0087] In some embodiments, as shown in Figure 5 , the thickness of the support portion 230 in the third direction is greater than the thickness of the main body 220, and the main body 220 is arranged near the middle of the support portion 230 in the third direction, and the first direction, the second direction and the third direction intersect with each other. It should be noted that the third direction herein can be understood as the Z direction shown in Figure 4 , so that the accommodating space 221 can be formed between the main body 220 and the cover plate 520 and between the main body 220 and the pole core 100 after the main body 220 and the support portion 230 are assembled, thereby reducing the forming difficulty of the accommodating space 221, thereby providing a certain bending space for the tab 120.

[0088] In the description of the present application, the features defined as "first", "second" and "third" can be explicitly or implicitly include one or more of the features, for distinguishing the description features, without order and without difference.

[0089] In some embodiments, in the third direction, the thickness of the main body 220 is in the range of 0.3mm-2mm. Wherein, the thickness of the main body 220 in the third direction herein can be understood as T shown in Figure 5 , when the thickness of the main body 220 is too thin, on the one hand, it will lead to the processing difficulty of the main body 220, which is easy to cause the main body 220 to be out of glue and deformed, on the other hand, it will also lead to the low structural strength of the main body 220, which is not enough to support the weight of the tab 120, thereby affecting the performance of the spacer 200; when the thickness of the main body 220 is too thick, on the one hand, it will lead to the main body 220 occupying a large internal space of the battery monomer 1000, and also will lead to the high processing cost and the heavy weight of the main body 220, thereby increasing the weight of the battery monomer 1000, which cannot realize the lightweight of the battery monomer 1000, on the other hand, it will also lead to the small space of the accommodating space 221.

[0090] To sum up, the thickness of the main body 220 in the third direction is set to 0.3mm-2mm, which can reduce the processing difficulty of the main body 220, avoid the main body 220 from being out of glue and deformed to a certain extent, ensure the structural strength of the main body 220, so that the main body 220 can support the weight of the tab 120, on the other hand, it can avoid the main body 220 from occupying too much internal space of the battery monomer 1000 to a certain extent, improve the internal space utilization rate of the battery monomer 1000, facilitate to improve the space of the containing space 221, and to a certain extent, it can also reduce the processing cost of the main body 220 and reduce the weight of the main body 220, thereby reducing the weight of the battery monomer 1000, so as to realize the light weight of the battery monomer 1000.

[0091] Specifically, the thickness of the main body 220 is 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2mm, etc.

[0092] In some embodiments, the thickness of the main body 220 in the third direction is 0.6mm-0.7mm. Further optimize the structure of the main body 220 to ensure the working performance of the main body 220.

[0093] In some embodiments, in combination with Figure 1 and Figure 5 As shown in the drawings, the battery monomer 1000 further comprises a side plate 300, the side plate 300 is arranged at at least one end of the pole core 100 in the second direction, the side of the supporting part 230 away from the main body 220 is provided with a fixing part 231, and the fixing part 231 is fixedly connected with the side plate 300. To realize the fixed connection of the supporting part 230 and the side plate 300, and then realize the fixed connection of the partition ring 200 and the side plate 300, it is convenient to fix and support the partition ring 200 by using the side plate 300, improve the position stability of the partition ring 200, and to a certain extent, ensure the working performance of the partition ring 200.

[0094] It should be noted that the side plate 300 is arranged at at least one end of the pole core 100 in the second direction can be understood as that the side plate 300 is arranged at one end of the pole core 100 in the second direction, and the other end is not provided with the side plate 300, or the side plate 300 is arranged at opposite ends of the pole core 100 in the second direction. The side plate 300 can provide reliable support force for the pole core 100, thereby ensuring the correct position and shape of the pole core 100 in the battery monomer 1000 to a certain extent, preventing the pole core 100 from being displaced, deformed or shaken due to external force during the production, assembly and use of the battery monomer 1000 to a certain extent, thereby ensuring the stability of the pole core 100, thereby helping to maintain the normal performance of the pole core 100.

[0095] Meanwhile, the fixed connection between the support part 230 and the side plate 300 is achieved by arranging the fixing part 231, and the fixing part 231 can reduce the difficulty of the fixed connection between the support part 230 and the side plate 300 to a certain extent, thereby reducing the connection difficulty between the separation ring 200 and the side plate 300.

[0096] In some embodiments, the side plate 300 is arranged in the shell 500 and fixedly connected with the shell 500 to improve the position stability of the side plate 300, thereby achieving the fixation and support of the separation ring 200 by the side plate 300.

[0097] In some embodiments, as shown in Figure 5 The specific structure of the fixing part 231 is not limited herein.

[0098] In some embodiments, when the fixing part 231 is a boss protruding from the support part 230, the support part 230 and the side plate 300 can be welded and connected by a hot-melt boss, thereby ensuring the fixed connection strength between the support part 230 and the side plate 300 to a certain extent, thereby ensuring the reliability of the fixed connection between the support part 230 and the side plate 300 and the connection stability between the separation ring 200 and the side plate 300.

[0099] In some other examples, when the fixing part 231 is a buckle protruding from the support part 230, a clamping groove is arranged on the side plate 300, and the buckle is clamped and matched in the clamping groove to achieve the fixed connection between the support part 230 and the side plate 300.

[0100] It should be noted that when the support part 230 and the side plate 300 are clamped and matched, the support part 230 and the side plate 300 are formed as detachable connection, which can facilitate the maintenance and replacement of the support part 230 and the side plate 300, thereby reducing the maintenance and replacement difficulty of the separation ring 200 and the side plate 300.

[0101] In some embodiments, as shown in Figure 5As shown, the side of the support part 230 away from the main body part 220 is provided with a plurality of fixing parts 231, and the plurality of fixing parts 231 are fixedly connected with the side plate 300. The plurality of fixing parts 231 can improve the connection strength of the support part 230 and the side plate 300 to a certain extent, thereby improving the connection strength of the spacer ring 200 and the side plate 300, and stabilizing the relative position of the spacer ring 200 and the side plate 300.

[0102] In some embodiments, in combination with Figure 1 、 Figure 5 and Figure 6 As shown, the spacer ring 200 is provided with an exhaust port 240, and the exhaust port 240 is arranged opposite the explosion-proof valve 400 of the battery monomer 1000. It can be understood here that the battery monomer 1000 has an explosion-proof valve 400, which is one of the core safety components of the battery monomer 1000. When the internal pressure of the battery monomer 1000 abnormally rises, the explosion-proof valve 400 will open to quickly release the gas, thereby preventing the battery monomer 1000 from exploding or catching fire and other serious safety accidents to a certain extent, thereby ensuring the safety of the battery monomer 1000 to a certain extent.

[0103] Among them, by arranging the exhaust port 240 opposite the explosion-proof valve 400, the exhaust port 240 can provide a guide path for the gas flow generated when the pole core 100 works, so that the gas can be discharged through the exhaust port 240, so that the gas can flow smoothly to the explosion-proof valve 400, to a certain extent. Avoiding the spacer ring 200 blocking the gas flow, improving the working performance of the spacer ring 200.

[0104] In some embodiments, as Figure 5 As shown, the exhaust port 240 is a honeycomb hole.

[0105] It should be noted that the shape of the exhaust port 240 can be a circular hole, a strip-shaped hole, or a star-shaped hole, and the specific hole structure of the exhaust port 240 is not limited herein.

[0106] In some embodiments, the tab 120 is welded with the cover plate 520. In order to realize the electrical connection of the tab 120 and the cover plate 520, and to ensure the connection strength of the tab 120 and the cover plate 520, and to improve the electrical connection quality of the tab 120 and the cover plate 520.

[0107] In some embodiments, the tab 120 is laser welded on the cover plate 520 to realize the welding of the tab 120 and the cover plate 520, reduce the connection difficulty of the tab 120 and the cover plate 520, and improve the connection quality.

[0108] In some embodiments, the shell 510 is electrically connected with the cover plate 520. By electrically connecting the shell 510 with the cover plate 520, the shell 510 can be charged, which facilitates reducing the insulation requirement of the battery monomer 1000 and reducing the risk of electric leakage of the battery monomer 1000.

[0109] Meanwhile, the shell 510 being charged can reduce the risk of internal short circuit caused by the dendrite penetrating the diaphragm, and improve the use safety of the battery monomer 1000.

[0110] In some embodiments, as shown in FIG. 5, the shell 510 is provided with the cover plate 520 at both ends in the third direction, and the shell 510 is electrically connected with the two cover plates 520 respectively, and the third direction intersects with the first direction. Figure 1 By providing the shell 510 with the cover plate 520 at both ends in the third direction, the two cover plates 520 can facilitate improving the sealing performance of the containing cavity 511, further avoiding the moisture and oxygen in the external air from entering into the containing cavity 511, and further avoiding the moisture and oxygen in the external air from affecting the chemical reaction between the electrode in the pole piece inside the pole core 100 and the electrolyte, which is conducive to maintaining the stability of the internal chemical system of the battery monomer 1000 and prolonging the service life of the battery monomer 1000.

[0111] In summary, when the battery monomer 1000 is subjected to external impact or vibration, the shell 500 formed by the shell 510 and the two cover plates 520 can ensure the position stability of the pole core 100 to a certain extent, thereby ensuring the normal operation of the pole core 100.

[0112] Meanwhile, by electrically connecting the shell 510 with the two cover plates 520 respectively, the shell 500 as a whole can be charged, which facilitates reducing the insulation requirement of the battery monomer 1000 and reducing the risk of electric leakage of the battery monomer 1000.

[0113] It should be noted that when the cover plate 520 is arranged opposite to the gasket 200 of the present application, the shape of the cover plate 520 can be referred to FIG. 5; and when the cover plate 520 is not arranged opposite to the gasket 200 of the present application, the shape of the cover plate 520 can be referred to FIG. 6. Figure 6 Figure 7 .

[0114] The battery assembly of the embodiments of the present application is described below.

[0115] According to the battery assembly of the embodiments of the present application, the battery assembly comprises a plurality of battery monomers 1000.

[0116] Among them, the battery monomer 1000 is the aforementioned battery monomer 1000, and the specific structure of the battery monomer 1000 is not described herein.

[0117] ​According to the battery assembly of the embodiment of the present application, the performance of the battery assembly can be improved to a certain extent by using the battery cell 1000.

[0118] It should be noted that the battery assembly can be understood as a battery module.

[0119] The battery pack of the embodiment of the present application is described below.

[0120] According to the battery pack of the embodiment of the present application, the performance of the battery pack can be improved to a certain extent by using the battery cell 1000 or the battery assembly.

[0121] The battery cell 1000 is the aforementioned battery cell 1000, and the battery assembly is the aforementioned battery assembly, and the specific structures of the battery cell 1000 and the battery assembly are not described herein.

[0122] According to the battery pack of the embodiment of the present application, the performance of the battery pack can be improved to a certain extent by using the battery cell 1000 or the battery assembly.

[0123] In some embodiments, the battery pack includes a box body, and the battery cell 1000 or the battery assembly is arranged in the box body.

[0124] The power consumption device of the embodiment of the present application is described below.

[0125] According to the power consumption device of the embodiment of the present application, the performance of the power consumption device can be improved to a certain extent by using the battery assembly or the battery pack.

[0126] The battery assembly is the aforementioned battery assembly, and the battery pack is the aforementioned battery pack, and the specific structures of the battery assembly and the battery pack are not described herein.

[0127] According to the power consumption device of the embodiment of the present application, the performance of the power consumption device can be improved to a certain extent by using the battery assembly or the battery pack.

[0128] It should be noted that the power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc.

[0129] The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc.; the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.

[0130] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0131] Figure 5 Figure 1 Two fixing members 231 are shown for illustrative purposes, but those skilled in the art will understand after reading the above technical solutions that the solutions can be applied to one, three, four or more fixing members 231, which also falls within the protection scope of the present application.

[0132] Other configurations of the battery monomer 1000, the battery assembly, the battery pack and the power utilization device according to the embodiments of the present application, such as the specific structure of the side plate 300 and the explosion-proof valve 400, are known to those skilled in the art, and will not be described in detail here.

[0133] In the description of the present application, the description referring to the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0134] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell, characterized in that, include: The housing (500) has a shell (510) and a cover (520), the shell (510) defining a receiving cavity (511) with an opening, and the cover (520) being disposed at the opening; An electrode core (100) is disposed within the receiving cavity (511). The electrode core (100) includes a plurality of electrode sheets stacked along a first direction and a plurality of electrode tabs (120), the electrode tabs (120) connecting the electrode sheets. A spacer (200) is provided between at least one end of the pole core (100) and the cover plate (520) and includes a main body (220) and a support (230). The main body (220) has a relief groove (210) at one end in the first direction, so that the relief groove (210) is located close to the end of the pole core (100) in the first direction. The support (230) is provided at least one end of the main body (220) in the second direction. The support (230) is in a stop-fitting relationship with the pole core (100) and the cover plate (520). In the third direction, the support ( The thickness of the support part (230) is greater than the thickness of the main body (220). The main body (220) is located near the support part (230) in the middle of the third direction. Accommodation spaces (221) are formed between the main body (220) and the cover plate (520) and between the main body (220) and the pole core (100). The accommodation spaces (221) are used to accommodate the pole tab (120). The pole tab (120) passes through the clearance groove (210) through the spacer (200) and is electrically connected to the cover plate (520). The first direction, the second direction and the third direction intersect each other. Side plate (300), the side plate (300) is disposed at at least one end of the pole core (100) in the second direction, the support part (230) is provided with a fastener (231) on the side opposite to the main body part (220), the fastener (231) is fixedly connected to the side plate (300).

2. The battery cell according to claim 1, characterized in that, The depth of the clearance groove (210) in the first direction ranges from 0.1 mm to 5 mm.

3. The battery cell according to claim 1, characterized in that, In the third direction, the thickness of the main body (220) ranges from 0.3mm to 2mm.

4. The battery cell according to claim 1, characterized in that, The support portion (230) has two parts, and the two support portions (230) are spaced apart at opposite ends of the main body portion (220) in the second direction.

5. The battery cell according to claim 1, characterized in that, The spacer (200) is provided with an exhaust port (240), which is positioned directly opposite the explosion-proof valve (400) of the battery cell.

6. The battery cell according to any one of claims 1-5, characterized in that, The tab (120) is welded to the cover plate (520).

7. The battery cell according to any one of claims 1-5, characterized in that, The housing (510) is electrically connected to the cover plate (520).

8. The battery cell according to claim 7, characterized in that, The housing (510) is provided with cover plates (520) at both ends in the third direction, and the housing (510) is electrically connected to the two cover plates (520) respectively.

9. A battery assembly, characterized in that, It includes multiple battery cells according to any one of claims 1-8.

10. A battery pack, characterized in that, It includes multiple battery cells according to any one of claims 1-8 or battery modules according to claim 9.

11. An electrical appliance, characterized in that, Includes the battery assembly according to claim 9 or the battery pack according to claim 10.

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