Single battery and battery pack

Abstract

The utility model discloses a single battery and a battery pack, and relates to the technical field of batteries. Each single battery comprises a shell, a top cover, a roll core, an insulating part and a liquid absorbing part; one end of the shell is provided with an opening, and electrolyte is arranged in the shell; the top cover covers the opening; the roll core is arranged in the shell; the insulating part is arranged in the shell and is abutted between the roll core and the top cover; the liquid absorbing piece is connected with the insulating piece and / or the top cover, and the liquid absorbing piece is used for transferring the electrolyte between the insulating piece and the top cover to the roll core. According to the single battery provided by the invention, the liquid absorbing piece is arranged and is connected with the insulating piece and / or the top cover, so that when the single battery is inversely applied, the liquid absorbing piece can transfer the electrolyte between the insulating piece and the top cover to the roll core to be in contact with the roll core, the utilization rate of the electrolyte is effectively improved, and the single battery keeps relatively good electrical performance.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a single cell and a battery pack. Background Art

[0002] With the continuous development of the electric vehicle industry, electric vehicles have higher and higher requirements on the energy density and safety of batteries. In order to improve the safety of electric vehicles, batteries are currently beginning to develop in the direction of inverted assembly technology.

[0003] When the battery is used upside down, maintaining good electrical performance of the battery is an issue that cannot be ignored. Therefore, how to maintain good electrical performance of the battery is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] In order to achieve the above-mentioned purpose, the present application is based on this, and the purpose of the present application is to provide a single cell battery, aiming to solve the technical problem in the prior art of how to maintain good electrical performance of the battery when the battery is used upside down.

[0005] The technical solutions adopted are as follows:

[0006] In a first aspect, an embodiment of the present application provides a single cell, comprising:

[0007] A shell having an opening at one end, wherein an electrolyte is arranged in the shell;

[0008] A top cover, which is disposed on the opening;

[0009] A winding core is disposed in the shell;

[0010] An insulating member, disposed in the housing and abutting between the winding core and the top cover;

[0011] A liquid absorbing member is disposed in the shell and connected to the insulating member and / or the top cover. The liquid absorbing member is used to transfer the electrolyte between the insulating member and the top cover to the winding core.

[0012] In one of the embodiments of the first aspect, the liquid absorbing member is connected to the insulating member and the top cover, an installation cavity is formed between the insulating member and the top cover, the liquid absorbing member is located in the installation cavity, the insulating member is penetrated by a through hole, the through hole is connected to the installation cavity, and the liquid absorbing member is used to transfer the electrolyte between the insulating member and the top cover to the winding core through the through hole.

[0013] In one of the embodiments of the first aspect, the liquid absorbing member is connected to the insulating member, the liquid absorbing member is sleeved on the insulating member, an installation cavity is formed between the insulating member and the top cover, a portion of the liquid absorbing member is located in the installation cavity, another portion of the liquid absorbing member is located outside the installation cavity and connected to the winding core, and the liquid absorbing member is used to transfer the electrolyte in the installation cavity to the winding core.

[0014] In one of the embodiments of the first aspect, a through hole passes through the insulating member, and the through hole is communicated with the installation cavity.

[0015] In one of the embodiments of the first aspect, the liquid absorbing member is connected to a side of the insulating member close to the winding core and is connected to the winding core. The insulating member is penetrated by a through hole, and the liquid absorbing member is used to transfer the electrolyte between the insulating member and the top cover to the winding core through the through hole.

[0016] In one embodiment of the first aspect, the liquid absorbing member is connected to the top cover, the insulating member is provided with an avoidance hole, a portion of the liquid absorbing member is connected to the top cover, and another portion of the liquid absorbing member is passed through the avoidance hole and connected to the winding core, and the liquid absorbing member is used to transfer the electrolyte between the insulating member and the top cover to the winding core.

[0017] In one of the embodiments of the first aspect, the liquid absorbent member includes a first liquid absorbent part, a connecting part, and a second liquid absorbent part, the connecting part is connected to the first liquid absorbent part and the second liquid absorbent part respectively, the first liquid absorbent part is connected to the roll core, and the second liquid absorbent part is connected to the top cover.

[0018] In one embodiment of the first aspect, the insulating member includes a first sub-insulating member and a second sub-insulating member connected to each other, the first sub-insulating member protrudes toward the winding core, and the liquid absorbing member is connected to the first sub-insulating member and / or the top cover.

[0019] In one embodiment of the first aspect, the first sub-insulator is detachably connected to the second sub-insulator.

[0020] In a second aspect, an embodiment of the present application further provides a battery pack, comprising a single cell battery as described in any of the above embodiments.

[0021] The beneficial effects of the present application are as follows: the present application proposes a single cell battery, the single cell battery comprises a shell, a top cover, a winding core, an insulating member and a liquid absorbing member, one end of the shell has an opening, an electrolyte is arranged in the shell, the top cover is arranged on the opening, the winding core and the insulating member are arranged in the shell, and the insulating member abuts between the winding core and the top cover. By arranging the liquid absorbing member and connecting the liquid absorbing member with the insulating member and / or the top cover, when the single cell battery is used upside down, the liquid absorbing member can transfer the electrolyte between the insulating member and the top cover to the winding core and contact the winding core, which effectively improves the utilization rate of the electrolyte and enables the single cell battery to maintain good electrical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The top cover, insulating member and liquid absorbing member in some embodiments of the present application are shown in a three-dimensional diagram. Figure 1 ;

[0024] Figure 2 The schematic diagram shows the exploded view of the top cover, the insulating member and the liquid absorbing member in some embodiments of the present application. Figure 1 ;

[0025] Figure 3 A three-dimensional schematic diagram showing a single battery without a shell in some embodiments of the present application Figure 1 ;

[0026] Figure 4 The cross-sectional view of a single cell without the shell in some embodiments of the present application is shown. Figure 1 ;

[0027] Figure 5 Shows Figure 4 A magnified schematic diagram of the structure of the middle A section;

[0028] Figure 6 The top cover, insulating member and liquid absorbing member in some embodiments of the present application are shown in a three-dimensional diagram. Figure 2 ;

[0029] Figure 7 The schematic diagram shows the exploded view of the top cover, the insulating member and the liquid absorbing member in some embodiments of the present application. Figure 2 ;

[0030] Figure 8 A three-dimensional schematic diagram showing a single battery without a shell in some embodiments of the present application Figure 2 ;

[0031] Fig. 9 The cross-sectional view of a single cell without the shell in some embodiments of the present application is shown. Figure 2 ;

[0032] Fig.10 Shows Fig. 9 A magnified schematic diagram of the structure of the middle B section;

[0033] Fig.11 The top cover, insulating member and liquid absorbing member in some embodiments of the present application are shown in a three-dimensional diagram. Figure 3 ;

[0034] Fig.12 The schematic diagram shows the exploded view of the top cover, the insulating member and the liquid absorbing member in some embodiments of the present application. Figure 3 ;

[0035] Fig.13 A three-dimensional schematic diagram showing a single battery without a shell in some embodiments of the present application Figure 3 ;

[0036] Fig.14 The cross-sectional view of a single cell without the shell in some embodiments of the present application is shown. Figure 3 ;

[0037] Fig.15 Shows Fig.14 An enlarged schematic diagram of the structure of the middle C section;

[0038] Fig.16 The top cover, insulating member and liquid absorbing member in some embodiments of the present application are shown in a three-dimensional diagram. Figure 4 ;

[0039] Fig.17 The schematic diagram shows the exploded view of the top cover, the insulating member and the liquid absorbing member in some embodiments of the present application. Figure 4 ;

[0040] Fig.18 A three-dimensional schematic diagram showing a single battery without a shell in some embodiments of the present application Figure 4 ;

[0041] Fig.19 The cross-sectional view of a single cell without the shell in some embodiments of the present application is shown. Figure 4 ;

[0042] Fig. 20 Shows Fig.19 A magnified schematic diagram of the structure of the middle D section;

[0043] Fig.21 shows an exploded schematic diagram of a single cell in some embodiments of the present application;

[0044] Fig. 22The schematic diagram shows the exploded view of the top cover, the insulating member and the liquid absorbing member in some embodiments of the present application. Figure 5 ;

[0045] Fig.23 A three-dimensional schematic diagram showing a single battery without a shell in some embodiments of the present application Figure 5 ;

[0046] Fig.24 An exploded schematic diagram of a single cell without a shell in some embodiments of the present application is shown;

[0047] Fig.25 The cross-sectional view of a single cell without the shell in some embodiments of the present application is shown. Figure 5 ;

[0048] Fig.26 Shows Fig.25 Enlarged schematic diagram of the structure of section E in the middle.

[0049] Description of main component symbols:

[0050] 100-single battery; 110-top cover; 120-winding core; 130-insulating member; 131-through hole; 132-first sub-insulating member; 1321-first clamping portion; 133-second sub-insulating member; 1331-second clamping portion; 134-avoidance hole; 140-liquid absorbing member; 141-first liquid absorbing portion; 142-connecting portion; 143-second liquid absorbing portion; 150-housing; 151-opening; 160-installation cavity. DETAILED DESCRIPTION

[0051] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] It should be noted that in the related art, when the battery is used upside down, the free electrolyte will accumulate at the top cover of the battery, and the internal bare battery cells cannot come into contact with the free electrolyte accumulated at the top cover due to the support of the plastic under the top cover, resulting in a decrease in the utilization rate of the electrolyte, thereby causing a decrease in the electrical performance of the battery.

[0057] In view of this, if Fig.21 As shown, the embodiment of the present application provides a single battery 100, which is mainly used in a battery pack. The single battery 100 includes: a housing 150, a top cover 110, a winding core 120, an insulating member 130 and a liquid absorbing member 140.

[0058] See also Figure 2 , Figure 7 , Fig.12 , Fig.17 and Fig. 22, wherein one end of the shell 150 has an opening 151, an electrolyte is disposed in the shell 150, the top cover 110 is disposed on the opening 151, the winding core 120 and the insulating member 130 are both disposed in the shell 150, and the insulating member 130 is abutted between the winding core 120 and the top cover 110. The liquid absorbing member 140 is disposed in the shell 150, and the liquid absorbing member 140 is connected to the insulating member 130 and / or the top cover 110, and the liquid absorbing member 140 is used to transfer the electrolyte between the insulating member 130 and the top cover 110 to the winding core 120.

[0059] The single cell 100 provided in the embodiment of the present application provides an insulating member 130 in the housing 150 that abuts between the winding core 120 and the top cover 110 to support and insulate the winding core 120. On the one hand, the winding core 120 is stably arranged in the housing 150, and on the other hand, the probability of short circuit is effectively reduced, thereby improving safety. By providing a liquid absorbing member 140 and connecting the liquid absorbing member 140 to the insulating member 130 and / or the top cover 110, when the single cell 100 is used inverted, the liquid absorbing member 140 can transfer the electrolyte between the insulating member 130 and the top cover 110 to the winding core 120 and contact the winding core 120, thereby effectively improving the utilization rate of the electrolyte, thereby improving the cycle performance of the winding core 120 and extending the service life, so that the single cell 100 maintains good electrical performance.

[0060] For example, the insulating member 130 may be made of plastic, and the liquid absorbing member 140 may be a sponge or foamed cotton that is resistant to electrolysis, insulating, and has good water absorption.

[0061] like Figures 1 to 5 As shown, in one embodiment of the present application, the liquid absorbent member 140 is connected to the insulating member 130 and the top cover 110, and an installation cavity 160 is formed between the insulating member 130 and the top cover 110. The liquid absorbent member 140 is located in the installation cavity 160. The insulating member 130 is penetrated by a through hole 131, and the through hole 131 is connected to the installation cavity 160. The liquid absorbent member 140 is used to transfer the electrolyte between the insulating member 130 and the top cover 110 to the core 120 through the through hole 131.

[0062] In this embodiment, the liquid absorbing member 140 can be connected to the insulating member 130 and the top cover 110 by abutting, by forming a mounting cavity 160 between the insulating member 130 and the top cover 110, and the insulating member 130 is penetrated with a through hole 131 communicating with the mounting cavity 160, and the liquid absorbing member 140 is arranged in the mounting cavity 160 and connected to the insulating member 130 and the top cover 110. In this way, when the single battery 100 is used upside down, the liquid absorbing member 140 can indirectly transfer the electrolyte between the insulating member 130 and the top cover 110 to the winding core 120 through the through hole 131 and contact the winding core 120, which effectively improves the utilization rate of the electrolyte and enables the single battery 100 to maintain good electrical performance.

[0063] like Figures 16 to 20 As shown, in one embodiment of the present application, the liquid absorbent member 140 is connected to the insulating member 130, and the liquid absorbent member 140 is sleeved on the insulating member 130. An installation cavity 160 is formed between the insulating member 130 and the top cover 110. A portion of the liquid absorbent member 140 is located in the installation cavity 160, and another portion of the liquid absorbent member 140 is located outside the installation cavity 160 and connected to the winding core 120. The liquid absorbent member 140 is used to transfer the electrolyte in the installation cavity 160 to the winding core 120.

[0064] In this embodiment, a mounting cavity 160 is formed between the insulating member 130 and the top cover 110, a part of the liquid absorbent member 140 is disposed in the mounting cavity 160, and another part of the liquid absorbent member 140 is disposed outside the mounting cavity 160 and connected to the winding core 120, and the connection method can be abutment. In this way, when the single battery 100 is used upside down, the electrolyte between the insulating member 130 and the top cover 110 can be directly transferred to the winding core 120 through the part of the insulating member 130 located in the mounting cavity 160 and the part of the insulating member 130 located outside the mounting cavity 160 in sequence, and contact the winding core 120, which effectively improves the transmission efficiency of the electrolyte, thereby improving the utilization rate of the electrolyte, so that the single battery 100 maintains good electrical performance.

[0065] like Fig.16 and Fig.17 As shown, in the above embodiment of the present application, a through hole 131 passes through the insulating member 130 , and the through hole 131 is communicated with the mounting cavity 160 .

[0066] In this embodiment, the through hole 131 connected to the mounting cavity 160 is penetrated through the insulating member 130, so that when the single battery 100 is used upside down, on the one hand, the electrolyte between the insulating member 130 and the top cover 110 can be directly transferred to the winding core 120 through the portion of the insulating member 130 located in the mounting cavity 160 and the portion of the insulating member 130 located outside the mounting cavity 160 in sequence, and the winding core 120 contacts the winding core 120. On the other hand, the electrolyte between the insulating member 130 and the top cover 110 can be directly transferred to the winding core 120 through the portion of the insulating member 130 located in the mounting cavity 160, the through hole 131 and the portion of the insulating member 130 located outside the mounting cavity 160 in sequence, and the winding core 120 contacts the winding core 120, which further improves the transmission efficiency of the electrolyte, thereby further improving the utilization rate of the electrolyte and further improving the electrical performance of the single battery 100. In this embodiment, the through hole 131 is provided to facilitate exhaust to the explosion-proof valve at the top cover 110.

[0067] like Fig.17As shown, in the above-mentioned embodiment of the present application, the liquid absorbent part 140 includes a first liquid absorbent part 141, a connecting part 142 and a second liquid absorbent part 143, the first liquid absorbent part 141 is located outside the mounting cavity 160 and is connected to the winding core 120, the second liquid absorbent part 143 is located inside the mounting cavity 160, and the connecting part 142 connects the first liquid absorbent part 141 and the second liquid absorbent part 143.

[0068] In this embodiment, the connecting portion 142 is disposed outside the mounting cavity 160 and connected to the first liquid absorbing portion 141 and the second liquid absorbing portion 143 respectively, the first liquid absorbing portion 141 is disposed outside the mounting cavity 160 and connected to the winding core 120, and the second liquid absorbing portion 143 is disposed inside the mounting cavity 160. A groove may be disposed on the insulating member 130, and the liquid absorbing member 140 is located in the groove. The provision of the groove facilitates fixing the liquid absorbing member 140 on the insulating member 130.

[0069] When the single cell 100 is used inverted, the electrolyte between the insulating part 130 and the top cover 110 can be directly transferred to the winding core 120 through the second liquid absorption part 143, the connecting part 142 and the first liquid absorption part 141 in sequence and contact the winding core 120, which effectively improves the transmission efficiency of the electrolyte, thereby improving the utilization rate of the electrolyte and allowing the single cell 100 to maintain good electrical performance.

[0070] Exemplarily, the connection portion 142 may be integrally formed with the first and second liquid absorption portions 141 and 143, the first liquid absorption portion 141 may be abuttedly connected to the winding core 120, and the second liquid absorption portion 143 may be abuttedly connected to the insulating member 130.

[0071] like Figure 22 to Figure 26 As shown, in one embodiment of the present application, the liquid absorbent member 140 is connected to the top cover 110, the insulating member 130 is provided with an avoidance hole 134, a part of the liquid absorbent member 140 is connected to the top cover 110, and another part of the liquid absorbent member 140 is passed through the avoidance hole 134 and connected to the winding core 120, and the liquid absorbent member 140 is used to transfer the electrolyte between the insulating member 130 and the top cover 110 to the winding core 120.

[0072] In this embodiment, by opening the avoidance hole 134 on the insulating member 130, a part of the liquid absorbent member 140 is connected to the top cover 110, and another part of the liquid absorbent member 140 is passed through the avoidance hole 134 and connected to the winding core 120, and the connection method can be abutment. In this way, when the single battery 100 is used upside down, the electrolyte between the insulating member 130 and the top cover 110 can be directly transferred to the winding core 120 and contacted with the winding core 120 through the part connecting the insulating member 130 and the top cover 110 and the other part passing through the avoidance hole 134 and connected to the winding core 120, which effectively improves the transmission efficiency of the electrolyte, thereby improving the utilization rate of the electrolyte, so that the single battery 100 maintains good electrical performance.

[0073] like Fig.24 As shown, in the above embodiment of the present application, the liquid absorbent part 140 includes a first liquid absorbent part 141, a connecting part 142 and a second liquid absorbent part 143, the connecting part 142 is respectively connected to the first liquid absorbent part 141 and the second liquid absorbent part 143, the first liquid absorbent part 141 is connected to the winding core 120, and the second liquid absorbent part 143 is connected to the top cover 110.

[0074] In this embodiment, by connecting the connecting part 142 to the first liquid absorption part 141 and the second liquid absorption part 143 respectively, connecting the first liquid absorption part 141 to the winding core 120, and connecting the second liquid absorption part 143 to the top cover 110, when the single cell 100 is used inverted, the electrolyte between the insulating member 130 and the top cover 110 can be directly transferred to the winding core 120 through the second liquid absorption part 143, the connecting part 142 and the first liquid absorption part 141 in sequence and contact the winding core 120, which effectively improves the transmission efficiency of the electrolyte, thereby improving the utilization rate of the electrolyte, so that the single cell 100 maintains good electrical performance.

[0075] Exemplarily, the connection portion 142 may be integrally formed with the first liquid absorption portion 141 and the second liquid absorption portion 143, the first liquid absorption portion 141 may be abutted against the winding core 120, and the second liquid absorption portion 143 may be abutted against the top cover 110.

[0076] In this embodiment, a through hole can be penetrated through the insulating member 130 as needed to facilitate the electrolyte between the insulating member 130 and the top cover 110 to be transferred to the winding core 120 through the through hole and contact the winding core 120, thereby effectively improving the utilization rate of the electrolyte.

[0077] like Figure 1 , Figure 6 , Fig.11 , Fig.16 and Fig.23 As shown, in any of the above embodiments of the present application, the insulating member 130 includes a first sub-insulating member 132 and a second sub-insulating member 133 connected to each other, the first sub-insulating member 132 protrudes toward the direction close to the winding core 120, and the liquid absorbing member 140 is connected to the first sub-insulating member 132 and / or the top cover 110.

[0078] In this embodiment, the first sub-insulator 132 is protruded toward the winding core 120 to form a mounting cavity 160 for mounting the liquid absorbent 140 with the top cover 110, thereby providing an installation and accommodation space for the liquid absorbent 140. By providing the liquid absorbent 140 and connecting the liquid absorbent 140 with the first sub-insulator 132 and / or the top cover 110, when the single battery 100 is used upside down, the liquid absorbent 140 can transfer the electrolyte between the first sub-insulator 132 and the top cover 110 to the winding core 120 and contact the winding core 120, effectively improving the utilization rate of the electrolyte, thereby improving the cycle performance of the winding core 120 and extending the service life, so that the single battery 100 maintains good electrical performance.

[0079] For example, the first sub-insulating member 132 may be made of plastic, and the liquid absorbing member 140 may be a sponge or foamed cotton that is resistant to electrolysis, insulating, and has good water absorption.

[0080] like Figure 1 , Figure 6 , Fig.11 , Fig.16 and Fig. 22 As shown, in the above embodiment of the present application, the first sub-insulator 132 and the second sub-insulator 133 are detachably connected.

[0081] Along the length direction of the top cover 110 , the first sub-insulator 132 is located in the middle of the insulating member 130 .

[0082] In this embodiment, by setting the first sub-insulating member 132 at the middle position of the insulating member 130 along the length direction of the top cover 110, it is beneficial for the liquid absorbing member 140 to evenly transfer the electrolyte accumulated between the insulating member 130 and the top cover 110 to the winding core 120 and contact the winding core 120, thereby improving the uniformity of liquid absorption.

[0083] like Figures 11 to 15 As shown, in the above embodiment of the present application, the first sub-insulator 132 is provided with a first clamping portion 1321 , and the second sub-insulator 133 is provided with a second clamping portion 1331 matched with the first clamping portion 1321 .

[0084] In this embodiment, a first clamping portion 1321 is provided on the first sub-insulating member 132, and a second clamping portion 1331 matching the first clamping portion 1321 is provided on the second sub-insulating member 133, so that the first sub-insulating member 132 and the second sub-insulating member 133 can be detachably connected under the clamping action of the first clamping portion 1321 and the second clamping portion 1331, thereby facilitating the installation and removal of the liquid absorbent member 140 and improving the installation and disassembly efficiency of the liquid absorbent member 140.

[0085] At the same time, the detachable connection between the first sub-insulating member 132 and the second sub-insulating member 133 can also realize the assembly of the absorbent member 140 in the production process of the single battery 100, avoiding the technical problem that the first sub-insulating member 132 and the second sub-insulating member 133 are integrally formed, resulting in the need to assemble the absorbent member 140 in the production process of the top cover 110 and the insulating member 130, which makes the absorbent member 140 susceptible to external environmental contamination.

[0086] Exemplarily, the first clamping portion 1321 may be a clamping slot, and the second clamping portion 1331 may be a buckle matched with the clamping slot. In addition, the first clamping portion 1321 may also be a buckle, and the second clamping portion 1331 may be a clamping slot matched with the buckle.

[0087] like Figures 6 to 10 As shown, in one embodiment of the present application, the liquid absorbing member 140 is connected to a side of the insulating member 130 close to the winding core 120 and is connected to the winding core 120. The insulating member 130 is penetrated by a through hole 131. The liquid absorbing member 140 is used to transfer the electrolyte between the insulating member 130 and the top cover 110 to the winding core 120 through the through hole 131.

[0088] In this embodiment, the insulating member 130 is provided with a through hole 131, and the liquid absorbing member 140 is connected to the insulating member 130 and the winding core 120 respectively, and the connection method can be abutment. In this way, when the single battery 100 is used inverted, the electrolyte between the insulating member 130 and the top cover 110 can be transferred to the winding core 120 through the through hole 131 and the liquid absorbing member 140 in sequence and contact the winding core 120, which effectively improves the utilization rate of the electrolyte and enables the single battery 100 to maintain good electrical performance. At the same time, since the liquid absorbing member 140 is arranged between the insulating member 130 and the winding core 120, it can be realized that the liquid absorbing member 140 is assembled in the production process of the single battery 100, which reduces the probability of the liquid absorbing member 140 being contaminated by the external environment.

[0089] An embodiment of the present application further provides a battery pack (not shown in the figure), comprising a single cell 100 in any of the above embodiments.

[0090] In some embodiments, the battery pack can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0091] In order to meet different power requirements, the battery pack may include multiple single cells 100 or one single cell 100, where the single cell 100 refers to the smallest unit of the battery pack. Multiple single cells 100 may be connected in series and / or in parallel via electrode terminals for various applications. In the embodiments of the present application, multiple single cells 100 may directly form a battery pack.

[0092] The battery pack has the single cell 100 in any of the above embodiments, and thus has all the beneficial effects of the single cell 100, which will not be described in detail here.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A single cell battery, characterized in that: include: A shell (150) having an opening (151) at one end, wherein an electrolyte is disposed in the shell (150); A top cover (110) is disposed on the opening (151); A winding core (120) is disposed in the housing (150); An insulating member (130) is disposed in the housing (150) and abuts between the winding core (120) and the top cover (110); A liquid absorbing member (140) is disposed in the housing (150), and the liquid absorbing member (140) is connected to the insulating member (130) and / or the top cover (110), and the liquid absorbing member (140) is used to transfer the electrolyte between the insulating member (130) and the top cover (110) to the winding core (120).

2. The single cell according to claim 1, characterized in that: The liquid absorbing member (140) is connected to the insulating member (130) and the top cover (110); an installation cavity (160) is formed between the insulating member (130) and the top cover (110); the liquid absorbing member (140) is located in the installation cavity (160); a through hole (131) passes through the insulating member (130); the through hole (131) is connected to the installation cavity (160); the liquid absorbing member (140) is used to transfer the electrolyte between the insulating member (130) and the top cover (110) to the winding core (120) through the through hole (131).

3. The single cell according to claim 1, characterized in that: The liquid absorbing component (140) is connected to the insulating component (130), and the liquid absorbing component (140) is sleeved on the insulating component (130). An installation cavity (160) is formed between the insulating component (130) and the top cover (110). A portion of the liquid absorbing component (140) is located in the installation cavity (160), and another portion of the liquid absorbing component (140) is located outside the installation cavity (160) and connected to the winding core (120). The liquid absorbing component (140) is used to transfer the electrolyte in the installation cavity (160) to the winding core (120).

4. The single cell according to claim 3, characterized in that: The insulating member (130) is penetrated by a through hole (131), and the through hole (131) is communicated with the installation cavity (160).

5. The single cell according to claim 1, characterized in that: The liquid absorbing member (140) is connected to a side of the insulating member (130) close to the winding core (120), and is connected to the winding core (120); a through hole (131) runs through the insulating member (130); and the liquid absorbing member (140) is used to transfer the electrolyte between the insulating member (130) and the top cover (110) to the winding core (120) through the through hole (131).

6. The single cell according to claim 1, characterized in that: The liquid absorbing member (140) is connected to the top cover (110), the insulating member (130) is provided with an avoidance hole (134), a part of the liquid absorbing member (140) is connected to the top cover (110), and another part of the liquid absorbing member (140) is passed through the avoidance hole (134) and connected to the winding core (120), and the liquid absorbing member (140) is used to transfer the electrolyte between the insulating member (130) and the top cover (110) to the winding core (120).

7. The single cell according to claim 6, characterized in that: The liquid absorbent member (140) comprises a first liquid absorbent portion (141), a connecting portion (142) and a second liquid absorbent portion (143); the connecting portion (142) is connected to the first liquid absorbent portion (141) and the second liquid absorbent portion (143), respectively; the first liquid absorbent portion (141) is connected to the winding core (120), and the second liquid absorbent portion (143) is connected to the top cover (110).

8. The single cell according to any one of claims 1 to 7, characterized in that: The insulating member (130) comprises a first sub-insulating member (132) and a second sub-insulating member (133) which are connected to each other, the first sub-insulating member (132) protrudes in a direction close to the winding core (120), and the liquid absorbing member (140) is connected to the first sub-insulating member (132) and / or the top cover (110).

9. The single cell according to claim 8, characterized in that: The first sub-insulating member (132) and the second sub-insulating member (133) are detachably connected.

10. A battery pack, characterized in that: A single cell (100) comprising any one of claims 1 to 9.

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