Battery

Abstract

The utility model relates to the technical field of batteries, particularly provides a battery, and aims to solve the problem of poor insulativity of a partition plate and a conductive piece. In order to achieve the purpose, the battery provided by the utility model comprises a first battery cell and a second battery cell, a second battery cell; the partition plate is arranged between the first battery cell and the second battery cell; the conductive part is electrically connected with the first battery cell and the second battery cell respectively; a first through hole for the conductive part to penetrate through is formed in the partition plate, a sealing ring is arranged between the conductive part and the first through hole, an insulating part is arranged on the outer side of the sealing ring, the peripheral surface of the sealing ring is a first surface, the insulating part is provided with a second surface attached to the first surface, one of the first surface and the second surface is provided with a groove, and the other one is provided with a protruding part; the protruding part is contained in the groove. Through the cooperation of the protruding part and the groove, when the conductive piece is installed on the partition plate, the situation that metal filings on the conductive piece fall onto the partition plate from a gap between the insulating piece and the sealing ring to cause short circuit is avoided, safety is high, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a battery. Background Art

[0002] New energy batteries are a type of energy storage medium that is widely used in the field of new energy vehicles. They reduce dependence on raw energy and are in line with the concept of sustainable development.

[0003] At present, the sealing design of lithium-ion power batteries mainly sets a sealing ring between the battery pole and the top cover. The sealing ring is generally only a common ring. During the riveting assembly process of the pole and the sealing ring, metal wire is easy to "overflow", resulting in electrical connection between the shell and the pole. When multiple cells are set inside the power battery, this situation between the separators and the conductive parts between the cells is more serious, making the insulation of the battery unable to meet the requirements, posing a great safety hazard.

[0004] Accordingly, a new technical solution is needed to improve the insulation performance of the battery. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem of poor insulation performance of existing batteries.

[0006] In the first aspect, the utility model provides a battery, comprising: a first battery cell; a second battery cell; a partition, which is arranged between the first battery cell and the second battery cell; a conductive member, which is electrically connected to the first battery cell and the second battery cell respectively; a first through hole is provided on the partition for the conductive member to pass through, a sealing ring is provided between the conductive member and the first through hole, an insulating member is provided on the outer side of the sealing ring, the outer peripheral surface of the sealing ring is a first surface, the insulating member is provided with a second surface abutting the first surface, one of the first surface and the second surface is provided with a groove and the other is provided with a protrusion, and the protrusion is accommodated in the groove.

[0007] Optionally, the conductive member includes a first conductive block electrically connected to the first battery core, and part of the sealing ring is arranged between the first conductive block and the partition.

[0008] Optionally, the conductive member includes a second conductive block electrically connected to the second battery core, and part of the sealing ring is arranged between the second conductive block and the partition.

[0009] Optionally, the conductive member further includes a third conductive block passing through the first through hole, one end of the third conductive block is connected to the first conductive block, and the other end of the third conductive block is connected to the second conductive block.

[0010] Optionally, two first through holes are provided and spaced apart along the first direction, two third conductive blocks are provided and are arranged one-to-one with the first through holes, and two sealing rings are provided and are respectively arranged between the two third conductive blocks and the first through holes.

[0011] Optionally, the sealing ring includes a first sealing ring, which is arranged between the first conductive block and the partition; and / or the sealing ring also includes a second sealing ring, which is arranged between the second conductive block and the partition.

[0012] Optionally, the insulating member includes a first insulating block, part of which is disposed between the first conductive block and the partition; and / or the insulating member further includes a second insulating block, part of which is disposed between the second conductive block and the partition.

[0013] Optionally, a second through hole is provided on the first insulating block, and part of the first sealing ring is received in the second through hole; and / or a third through hole is provided on the second insulating block, and part of the second sealing ring is received in the third through hole.

[0014] Optionally, the battery further comprises a shell, the shell comprising a first shell and a second shell located on both sides of the partition, the first battery cell is located between the first shell and the partition, and the second battery cell is located between the second shell and the partition.

[0015] Optionally, the battery further includes a first pole disposed in the first shell, the first pole being electrically connected to the first battery cell; and / or the battery further includes a second pole disposed in the second shell, the second pole being electrically connected to the second battery cell.

[0016] The above one or more technical solutions of the utility model have at least one or more of the following beneficial effects:

[0017] In the battery provided by the utility model, when the conductive part is installed on the partition, since a protrusion is provided between the insulating part and the sealing ring, when metal chips on the conductive part enter the gap between the insulating part and the sealing ring, the protrusion can prevent the metal chips from contacting the partition, thereby preventing electrical connection between the conductive part and the partition to affect the insulation effect. At the same time, it can facilitate the installation and positioning of the insulating part and the sealing ring, and the structural stability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of a battery provided in an embodiment of the present application;

[0020] Figure 2 is a side view of a battery provided in an embodiment of the present application;

[0021] Figure 3 is a structural explosion diagram of a battery provided in an embodiment of the present application;

[0022] Figure 4 is along Figure 2 Partial cross-sectional view along line AA;

[0023] Figure 5 yes Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0024] Figure 6 is an exploded view of a local structure of a battery provided in an embodiment of the present application;

[0025] Figure 7 It is a schematic diagram of the structure of the sealing ring provided in the embodiment of the present application;

[0026] Figure 8 is a schematic diagram of an insulating member provided in an embodiment of the present application;

[0027] Fig. 9 It is a schematic diagram of the structure of the first conductive block and the third conductive block given in an embodiment of the present application.

[0028] List of reference numerals:

[0029] 1-battery, 11-first battery cell, 111-first pole ear, 12-second battery cell, 121-second pole ear, 13-partition, 131-first through hole, 14-first shell, 15-second shell, 21-first conductive block, 22-second conductive block, 23-third conductive block, 3-sealing ring, 301-first surface, 302-groove, 31-first sealing ring, 32-second sealing ring, 4-insulating member, 401-second surface, 402-protrusion, 41-first insulating block, 411-second through hole, 42-second insulating block, 421-third through hole. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the protection scope of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0031] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, ordinal numbers such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See also Figures 1 to 9 The battery 1 provided in the embodiment of the utility model is a battery 1 with electrically connected cells inside the shell.

[0034] like Figure 1-3 As shown, the battery 1 provided in this embodiment includes a first battery cell 11 and a second battery cell 12, a partition 13 is provided between the first battery cell 11 and the second battery cell 12, and the partition 13 is used to separate the housing into a first chamber and a second chamber, the first battery cell 11 is accommodated in the first chamber, and the second battery cell 12 is accommodated in the second chamber. In this way, the battery 1 can obtain a larger capacity.

[0035] It should be noted that the housing and the partition 13 are generally made of metal materials, so both are conductive.

[0036] like Figures 4 to 6 As shown, the first battery cell 11 and the second battery cell 12 are electrically connected via a conductive member. Specifically, a first through hole 131 is provided on the partition 13, and the conductive member passes through the first through hole 131, with one end thereof connected to the first battery cell 11 and the other end connected to the second battery cell 12, thereby achieving electrical connection between the first battery cell 11 and the second battery cell 12, such as series connection.

[0037] Due to the conductive property of the partition 13, a sealing ring 3 is also arranged between the conductive part and the first through hole 131. The sealing ring 3 is made of insulating material. This can ensure the sealing of the battery cell, prevent electrolyte leakage or intrusion of other materials, and provide a good closed environment for the reaction inside the battery 1. Secondly, it can form an insulating connection between the conductive part and the partition 13 to a certain extent.

[0038] Furthermore, an insulating member 4 is disposed outside the sealing ring 3 , and the sealing ring 3 and the insulating member 4 are disposed together around the conductive member to form an insulating connection between the conductive member and the housing, and between the conductive member and the partition 13 .

[0039] Further, such as Figure 5 , 7 As shown in FIGS. 8 and 8 , a stop structure is formed between the outer circumferential surface of the sealing ring 3 (referred to as the first surface 301 ) and the inner circumferential surface of the insulating member 4 (i.e. the surface in contact with the sealing ring 3 , referred to as the second surface 401 ).

[0040] like Figure 5 , 7 As shown in Figures 8 and 9, the stop structure is in the form of a structure of a groove 302 and a protrusion 402. Specifically: in a first embodiment, a groove 302 is provided on the first surface 301 of the sealing ring 3, and a protrusion 402 is provided on the second surface 401 of the insulating member 4, and the protrusion 402 is embedded in the groove 302; or, in a second embodiment, a groove is provided on the second surface 401 of the insulating member 4, and a protrusion is provided on the first surface 301 of the sealing ring 3, and the protrusion is embedded in the groove (not shown).

[0041] Furthermore, the cross section of the groove 302 may be rectangular, in which case the cross section of the protrusion 402 matching therewith is rectangular; the cross section of the groove 302 may be semicircular, in which case the cross section of the protrusion 402 matching therewith is semicircular.

[0042] Furthermore, the protrusions 402 and the grooves 302 can be closed annular or spaced circumferentially. The designer can design a suitable number of protrusions 402 and matching grooves 302 according to actual needs, and multiple protrusions 402 and grooves 302 can be evenly distributed on the circumference where they are located at equal intervals.

[0043] See also Figure 7 and 8 In this embodiment, a first surface 301 of the sealing ring 3 is provided with a groove 302, and a second surface 401 of the insulating member 4 is provided with a protrusion 402. Both the groove 302 and the protrusion 402 are cylindrical surfaces, so that processing and installation are more convenient.

[0044] In summary, the above structure can prevent metal debris on the conductive part from entering the gap between the insulating part 4 and the sealing ring 3 and contacting the partition, thereby preventing the conductive part from being electrically connected to the partition, playing an effective insulating role, and having high safety; at the same time, it can effectively locate the relative position of the sealing ring 3 and the insulating part 4, thereby increasing the stable connection between the sealing ring 3 and the insulating part 4, improving the sealing of the conductive part and the insulation between the partition 13. At the same time, it can effectively prevent the radial and axial displacement of the sealing ring 3, making it difficult for the sealing ring 3 to be misaligned with the conductive part, resulting in electrical connection between the conductive part and the housing or between the conductive part and the partition 13 and a short circuit.

[0045] like Figure 3 and 4 As shown, since the first battery cell 11 and the second battery cell 12 are respectively located on both sides of the partition 13, the electrical connection between the two is achieved in that the conductive member passes through the first through hole 131 on the partition 13, and the two ends of the conductive member are respectively connected to the first battery cell 11 and the second battery cell 12.

[0046] In an optional embodiment, the conductive member is composed of several independent parts. Such a design can facilitate the assembly of the battery cell, the conductive member and the partition 13 .

[0047] Specifically, if Figure 4 As shown, the conductive member includes a first conductive block 21 electrically connected to the first pole lug 111 of the first battery cell 11, a second conductive block 22 electrically connected to the second pole lug 121 of the second battery cell 12, and a third conductive block 23 located between the first conductive block 21 and the second conductive block 22 and electrically connected to both. The third conductive block 23 is designed to be cylindrical and passes through the first through hole 131 on the partition 13 to achieve electrical connection with the first conductive block 21 and the second conductive block 22, thereby achieving electrical connection between the first battery cell 11 and the second battery cell 12.

[0048] In practical applications, these conductive blocks can be connected to each other through welding, riveting or other connection techniques, and can also be connected to the tabs of the battery cell through welding, riveting or other connection techniques.

[0049] Please refer to Fig. 9 In order to facilitate assembly, in a preferred embodiment, the third conductive block 23 is integrally formed with the first conductive block 21 or welded in series, and then the third conductive block 23 passes through the first through hole 131 to be electrically connected to the second battery core 12 .

[0050] This built-in electrical connection method can reduce the number of components and assembly complexity, and may also enhance the robustness of the overall structure.

[0051] Furthermore, the sealing ring 3 is made of insulating elastic material. Figure 4As shown, the sealing ring 3 passes through the first through hole 131 axially and is partially embedded in the gap between the conductive member and the first through hole 131. The first conductive block 21 and the second conductive block 22 are respectively pressed against the sealing ring 3, thereby achieving an effective sealing environment to prevent the electrolytes in the cavities on both sides of the partition 13 from communicating with each other, and the sealing effect is significant.

[0052] In a preferred embodiment, two sealing rings 3 and two insulating members 4 are provided, because most rubber sealing rings 3 will produce elastic deformation under pressure, and will also produce permanent plastic deformation as the pressure increases, which will affect the service life of the battery 1. Providing two sealing rings 3 and insulating members 4 to form a bidirectional insulating seal can effectively reduce elastic deformation and extend the service life of the battery 1.

[0053] In this preferred embodiment, the configuration of the double sealing ring 3 and the insulating member 4 can more effectively absorb pressure, and can alleviate the degree of permanent plastic deformation of the single sealing ring 3 under pressure to a certain extent. This configuration can provide more reliable long-term sealing for the battery 1, reduce the decline in sealing performance caused by the deformation of the sealing ring 3, and thus help to extend the service life of the battery 1.

[0054] Specifically, if Figure 4 As shown, the sealing ring 3 includes a first sealing ring 31 , which is disposed between the first conductive block 21 and the partition 13 ; the sealing ring 3 also includes a second sealing ring 32 , which is disposed between the second conductive block 22 and the partition 13 .

[0055] The first sealing ring 31 and the second sealing ring 32 are also sleeved on the columnar structures of the first conductive block 21 and the third conductive block 23, and the first sealing ring 31 and the second sealing ring 32 are respectively located on both sides of the partition 13, and the thickness of each sealing ring 3 is greater than the thickness of the partition 13. Under the effect of interference fit, the hole wall of the first through hole 131 and the conductive block with a columnar structure cooperate to squeeze the two sealing rings 3, which can play a role of limiting and stopping the two sealing rings 3.

[0056] Furthermore, during assembly, each sealing ring 3 can be installed separately without passing through the first through hole 131 during the assembly process, which can reduce the difficulty of assembly to a certain extent. At the same time, by respectively arranging the sealing ring 3 between the two conductive blocks and the partition 13, a more solid and reliable sealing effect can be provided.

[0057] Furthermore, the insulating member 4 includes a first insulating block 41, which is sleeved outside the first sealing ring 31 and partially disposed between the first conductive block 21 and the partition 13; the insulating member 4 also includes a second insulating block 42, which is sleeved outside the second sealing ring 32 and partially disposed between the second conductive block 22 and the partition 13.

[0058] In a preferred embodiment, Figure 6 and 8 As shown, the first conductive block 21 and the second conductive block 22 are both in the shape of long strips, the third conductive block 23 is a columnar conductive block, and two third conductive blocks 23 are provided, which are respectively arranged on the first conductive block 21 along the length direction of the first conductive block 21.

[0059] Correspondingly, the first insulating block 41 is provided with a second through hole 411 , and two second through holes 411 are provided corresponding to the third conductive block 23 ; the second insulating block 42 is provided with a third through hole 421 , and two third through holes 421 are provided corresponding to the third conductive block 23 .

[0060] Correspondingly, two through holes are spaced apart on the partition 13 along the first direction (the width direction of the partition 13), and the third conductive block 23 is connected to the second conductive block 22 through the first through hole 131. The sealing ring 3 and the insulating part 4 are arranged between the first conductive block 21, the second conductive block 22 and the third conductive block 23 to ensure the insulation connection between them and the partition 13.

[0061] On the one hand, setting up two sets of connections can ensure the reliability of the connection. On the other hand, since the connection method is an axial hole matching connection, setting up two sets of connections in the width direction of the partition 13 can prevent the battery cell from twisting relative to the partition 13, thereby improving the stability of the connection.

[0062] In an optional embodiment, the battery includes a shell, the shell includes a first shell 14 and a second shell 15, and the battery 1 provided in this embodiment also includes: a first pole disposed on the first shell 14, the first pole is electrically connected to the first battery cell 11. A second pole is disposed on the second shell 15, the second pole is electrically connected to the second battery cell 12. The first pole and the second pole have opposite polarities.

[0063] Specifically, a first pole is provided at the other end of the shell, i.e., the end opposite to the conductive member, and the first pole serves as the output interface of the battery 1; similarly, a second pole is provided at the other end of the shell, i.e., the end opposite to the conductive member, and the second pole serves as the output interface of the battery 1. The first pole is provided at one end of the shell corresponding to the first cavity, and the second pole is provided at one end of the shell corresponding to the second cavity.

[0064] The battery 1 can transmit the electric energy generated by the electrical connection between the first battery cell 11 and the second battery cell 12 through the first pole and the second pole. In this way, the poles are arranged on the shell so that they can be easily connected to the circuit outside the battery 1 or other battery 1 modules, simplifying the assembly process and the construction of the battery pack.

[0065] Of course, in this embodiment, only two battery cells are connected in series as an example. It can be inferred that the battery 1 can also be configured with multiple groups of battery cells connected in series, which are connected in series through the structure of the conductive part, sealing ring 3, insulating part 4 and partition 13 provided in this embodiment to form multiple groups of battery cell assemblies connected in series to increase the capacity of the battery 1.

[0066] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: The first battery cell; The second battery cell; a separator disposed between the first battery cell and the second battery cell; A conductive member, which is electrically connected to the first battery cell and the second battery cell respectively; The partition is provided with a first through hole through which the conductive member passes, a sealing ring is provided between the conductive member and the first through hole, an insulating member is provided on the outer side of the sealing ring, the outer peripheral surface of the sealing ring is a first surface, the insulating member is provided with a second surface abutting against the first surface, one of the first surface and the second surface is provided with a groove and the other is provided with a protrusion, and the protrusion is received in the groove.

2. The battery according to claim 1, characterized in that The conductive member includes a first conductive block electrically connected to the first battery core, and part of the sealing ring is arranged between the first conductive block and the partition.

3. The battery according to claim 2, characterized in that The conductive member includes a second conductive block electrically connected to the second battery core, and part of the sealing ring is arranged between the second conductive block and the partition.

4. The battery according to claim 3, characterized in that The conductive member further includes a third conductive block passing through the first through hole, one end of the third conductive block is connected to the first conductive block, and the other end of the third conductive block is connected to the second conductive block.

5. The battery according to claim 4, characterized in that There are two first through holes and they are spaced apart along the first direction. There are two third conductive blocks and they are arranged one-to-one with the first through holes. There are two sealing rings and they are respectively arranged between the two third conductive blocks and the first through holes.

6. The battery according to claim 5, characterized in that The sealing ring includes a first sealing ring, and the first sealing ring is arranged between the first conductive block and the partition; and / or, The sealing ring further includes a second sealing ring, and the second sealing ring is arranged between the second conductive block and the partition.

7. The battery according to claim 6, characterized in that The insulating member includes a first insulating block, a portion of which is disposed between the first conductive block and the partition; and / or, The insulating member further includes a second insulating block, and a portion of the second insulating block is disposed between the second conductive block and the partition.

8. The battery according to claim 7, characterized in that The first insulating block is provided with a second through hole, and part of the first sealing ring is received in the second through hole; and / or, The second insulating block is provided with a third through hole, and part of the second sealing ring is received in the third through hole.

9. The battery according to claim 1, characterized in that The battery further comprises a shell, wherein the shell comprises a first shell and a second shell located on both sides of the partition, the first battery cell is located between the first shell and the partition, and the second battery cell is located between the second shell and the partition.

10. The battery according to claim 9, characterized in that The battery further comprises a first pole disposed on the first shell, the first pole being electrically connected to the first battery cell; and / or, The battery further includes a second pole disposed on the second shell, and the second pole is electrically connected to the second battery cell.

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