Partition plate assembly and battery

Abstract

The utility model relates to the technical field of batteries, particularly provides a partition plate assembly and a battery, and aims to solve the problem of low assembly efficiency of the conventional battery. In order to achieve the purpose, the partition plate assembly provided by the utility model comprises a partition plate and an insulating part, and the insulating part is formed on the partition plate in an injection molding manner. According to the design, the procedure of assembling the insulating frame assembly can be omitted, so that the assembling process of the battery is simplified, the assembling efficiency of the battery is improved, and the insulation between the battery core and the shell can be realized.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also growing. Therefore, increasing the production speed of batteries to increase battery output has become an urgent problem to be solved.

[0003] In some related technologies, in order to increase the battery capacity, a common practice in battery design is to connect multiple cells in series or in parallel inside the shell by setting electrical connection components on the partitions between the cells. The electrical connection components on the partitions usually cover several components, such as insulators, seals, and conductive poles for the positive and negative electrodes. Among them, the insulating parts are used to isolate the electrical contact between the cells and the shell. The insulating parts are complicated to assemble and have low efficiency, which will affect the production speed of the battery.

[0004] Accordingly, the art needs a new technical solution for a battery separator assembly to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem of low efficiency of existing battery assembly.

[0006] In a first aspect, the utility model provides a partition assembly, wherein the partition assembly comprises a partition and an insulating member, wherein the insulating member is injection molded on the partition.

[0007] Optionally, the partition is provided with a groove, and part of the insulating member is received in the groove.

[0008] Optionally, in the first direction, the insulating members are respectively provided on both sides of the partition; and / or, in the second direction, the insulating members are respectively provided on both ends of the partition.

[0009] Optionally, the partition assembly further comprises an insulating block, wherein the insulating block is detachably connected to the insulating member, and a channel is provided between the insulating block and the insulating member.

[0010] Optionally, the insulating member is provided with a receiving groove communicated with the channel.

[0011] Optionally, the insulating member includes insulating plates located on both sides in the third direction.

[0012] In a second aspect, the utility model provides a battery, comprising a first shell, a second shell, and a partition assembly as described in any one of the first aspects, wherein the partition assembly is disposed between the first shell and the second shell.

[0013] Optionally, the battery further includes a battery cell disposed between the first shell and the partition and a battery cell between the second shell and the partition, and the insulating member is disposed between the battery cell and the first shell and / or the second shell in the second direction.

[0014] Optionally, the insulating plate is located between the battery cell and the first shell and / or the second shell in the third direction.

[0015] Optionally, in the second direction, the insulating members are provided at both ends of the partition, the distance between the two insulating members is A, the length of the battery cell is C, wherein 0≤CA≤1mm; and / or, in the third direction, the size of the battery cell is D, the size of the insulating member is B, wherein 0≤DB≤1mm.

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

[0017] The partition assembly provided by the utility model includes a partition and an insulating member, wherein the insulating member is injection molded at the end of the partition to form an integrally molded structure. The role of the insulating member in the partition assembly is to provide electrical isolation and support structure. The injection molded insulating member can be better connected to the partition to form a more solid overall structure, thereby improving the stability and reliability of the battery assembly.

[0018] Furthermore, the design structure of the partition assembly can save the process of assembling insulating parts and reduce the number of components of the battery assembly, which can not only reduce the difficulty of assembly and maintenance costs, but also simplify the battery assembly process and improve the battery assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a partial structural schematic diagram of a partition assembly provided in an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the exploded structure of the partition assembly provided by the embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the assembly structure of a battery provided by an embodiment of the utility model;

[0023] Figure 4 yes Figure 3 Schematic diagram of the structure cut along the AA section line;

[0024] Figure 5 yes Figure 4 A schematic diagram of the structure enlarged at F in the middle;

[0025] Figure 6 yes Figure 5 A magnified schematic diagram of the local structure;

[0026] Figure 7 It is a schematic diagram of the explosion structure of a battery provided in an embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of the assembly structure of the partition assembly provided by the embodiment of the utility model;

[0028] Fig. 9 It is a schematic diagram of the battery cell structure provided by an embodiment of the utility model.

[0029] Reference numerals list :

[0030] 1-partition, 11-groove, 2-insulating member, 201-first insulating member, 202-second insulating member, 21-insulating block, 22-channel, 23-receiving groove, 24-insulating plate, 31-first shell, 32-second shell, 33-first battery cell, 331-first pole ear, 34-second battery cell, 341-second pole ear, 51-first pole column, 52-second pole column, 6-battery. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] First of all, it should be noted that the separator and shell of the battery cell are generally made of metal materials, so both are conductive. Generally, the battery cell is electrically isolated from the separator or shell by an insulating member.

[0035] See also Figures 1 to 6 The partition assembly provided in the embodiment of the utility model is used to separate multiple battery cells in a shell so that each battery cell is in an independent sealed cavity.

[0036] like Figure 1 As shown, the separator assembly includes a separator 1 and an insulating member 2, wherein the insulating member 2 is injection molded at the end of the separator 1 to form an integrally molded structure. This design can save the process of assembling the insulating member, thereby simplifying the assembly process of the battery and improving the assembly efficiency of the battery.

[0037] The role of the insulating member 2 in the separator assembly is to provide insulation and support. The injection-molded insulating member 2 can be better connected to the separator 1 to form a more solid overall structure, thereby improving the stability and reliability of the battery assembly.

[0038] Furthermore, the design structure of the separator assembly can reduce the number of components of the battery assembly, reduce assembly difficulty and maintenance costs, and can also avoid incorrect assembly during the assembly process. Therefore, the battery of this embodiment has higher assembly efficiency and reliability.

[0039] In an optional embodiment, if Figure 1 and 2 As shown, the insulating member 2 is protrudingly disposed on the two side surfaces of the partition 1 on both sides in the first direction (the thickness direction of the partition 1) of the partition 1. In other words, the insulating member 2 is protrudingly disposed on the two side surfaces of the partition 1 and extends away from the side surfaces of the partition 1 to both sides in the thickness direction of the partition 1.

[0040] In an optional embodiment, if Figure 3-6 As shown, a plurality of grooves 11 are provided on both side surfaces of the partition plate 1 in the first direction.

[0041] Specifically, if Figure 6As shown, a plurality of grooves 11 are provided on the joint surface of the partition 1 and the insulating member 2, and the insulating member 2 is partially received in the grooves 11. The partition 1 and the insulating member 2 are injection molded in such a structure by a nano injection molding process, so that the joint boundary between the insulating member 2 and the partition 1 is seamlessly connected at the nano level.

[0042] In an optional embodiment, the depth of the groove 11 can be any value between 10um and 290um, which indicates that the depth of the groove 11 is very shallow, only about one thousandth to one third of a millimeter. This shallow depth is critical for micro injection molding processes to ensure the accuracy and precision of injection molding.

[0043] In a preferred embodiment, the width of the groove 11 can be any value between 20um and 200um, that is, about 20 to 2 thousandths of a millimeter. Such fine dimensional control can ensure that the insulating member 2 is completely embedded in the partition 1, thereby achieving a seamless connection on the joint surface and ensuring the stability of the connection between the partition 1 and the insulating member 2.

[0044] It is important to understand that the two ends of the battery cell are connected to the positive and negative lugs. The positive lug is usually a conductor connected to the positive electrode (i.e., anode) of the battery cell, and is used to lead out the positive potential of the battery cell. The negative lug is a conductor connected to the negative electrode (i.e., cathode) of the battery cell, and is used to lead out the negative potential of the battery cell. Through such a lug lead design, the battery cell can be electrically connected to the external circuit and other batteries to meet the needs of the entire battery system.

[0045] Since the battery cells in series need to be connected in series in terms of potential, the tab at one end of the battery cell needs to pass through the partition 1 to be electrically connected to the tab of the adjacent battery cell to connect the two battery cells in series; the tab at the other end of the battery cell needs to pass through the shell and be electrically connected to the external circuit to lead out the battery potential.

[0046] Considering that the tab is usually located at the end of the battery cell, in an optional embodiment, Figure 2 As shown, two insulating members 2 are provided in the second direction of the partition 1 (the length direction of the partition 1), namely, the first insulating member 201 and the second insulating member 202. The first insulating member 201 and the second insulating member 202 are respectively located at both ends of the partition 1, close to the position of the battery cell tabs, so as to facilitate the electrical connection between the tabs and the partition 1, and between the tabs and the shell. This helps to reduce the risk of short circuit and ensure the safety and stability of the battery system.

[0047] It is also necessary to understand that the conductive electrode column arranged at the end of the shell is used to electrically connect with the tab of the battery cell, so as to lead out the potential of the battery. Specifically, a portion of the conductive electrode column is arranged inside the shell, and a portion of it passes through the outside of the shell. The conductive electrode column arranged inside the shell is used to electrically connect with the tab of the battery cell.

[0048] In order to prevent the electrode tab from being electrically connected to the inner wall of the shell or the partition 1 when connected to the conductive electrode column, an insulating member 2 is provided between the electrode tab and the shell, and between the electrode tab and the partition 1. The electrode tab needs to pass through the insulating member 2 to be electrically connected to the conductive electrode column.

[0049] In an optional embodiment, if Figure 5 As shown, an insulating block 21 is provided on the insulating member 2, and the insulating block 21 and the insulating member 2 can be detachably connected, and after the insulating block 21 and the insulating member 2 are assembled and connected, a channel 22 for the tab to pass through is formed between the two.

[0050] In this embodiment, the first battery cell 33 and the second battery cell 34 connected in series are taken as an example for description.

[0051] like Figure 5 As shown, the first pole ear 331 of the first battery cell 33 is a positive pole ear, the first pole column 51 is a positive pole column, and the first pole ear 331 passes through the channel 22 between the insulating member 2 on one side of the partition 1 and the insulating block 21 to be electrically connected to the first pole column 51; the second pole ear 341 of the second battery cell 34 is a negative pole ear, the second pole column 52 is a negative pole column, and the second pole ear 341 passes through the channel 22 between the insulating member 2 on the other side of the partition 1 and the insulating block 21 to be electrically connected to the second pole column 52, thereby leading out the potential of the battery. At the same time, since the channel 22 between the insulating member 2 and the insulating block 21 is isolated by insulating material, the circuit inside the battery can be kept in an isolated state to avoid short circuit or other unexpected situations.

[0052] It should be understood that the tab is generally a thin, bendable metal sheet used to connect to the conductive electrode column.

[0053] In an optional embodiment, if Figure 5 As shown, a receiving groove 23 is provided on the outer end surface of the insulating member 2 (referring to the end surface on the side away from the battery cell) for receiving the bent portion of the tab. In this way, when the tab passes through the insulating member 2, its bent portion will be received by the receiving groove 23. The provision of the receiving groove 23 can also prevent the tab from directly contacting the surface of the insulating member 2, which helps to protect the tab from collision, extrusion, damage, and affect the battery performance.

[0054] Furthermore, the receiving groove 23 is connected to the channel 22 to ensure that the space through which the pole ear passes through the insulating member 2 remains continuous and avoid displacement of the pole ear when passing through the channel 22, thereby ensuring good electrical connection between the pole ear and the pole, thereby improving the efficiency and stability of the battery electrical connection.

[0055] Furthermore, through the detachable connection design between the insulating block 21 and the insulating member 2 and the configuration structure of the channel 22 and the receiving groove 23, the structure can provide a convenient assembly and disassembly process and effectively protect the isolation and connection between the tab and other components.

[0056] For further information, please refer to Figure 5 , specifically, the assembly process between the pole ear and the insulating member 2 is as follows: first, the bent portion of the pole ear is received in the receiving groove 23 , so that an insulating connection is formed between the pole ear and the partition 1 through the insulating member 2 .

[0057] Next, the insulating block 21 is connected with the insulating member 2. Specifically, a positioning hole is provided on one of the insulating member 2 and the insulating block 21, and a positioning protrusion is provided on the other. Then, the positioning protrusion is inserted into the positioning hole, so that the insulating member 2 and the insulating block 21 are positioned and fixedly connected.

[0058] During this connection process, a space channel 22 for accommodating the pole ear is formed between the insulating member 2 and the insulating block 21. The insulating block 21 is placed between the pole ear and the inner wall of the shell, so that an insulating connection is formed between the pole ear and the inner wall of the shell through the insulating block 21.

[0059] Furthermore, by designing the positioning holes and positioning protrusions, the insulating block 21 and the insulating member 2 can be conveniently positioned and fixed to ensure a firm and reliable connection between them. At the same time, this design also allows for easy disassembly when necessary to facilitate maintenance or replacement of the battery assembly.

[0060] This assembly process ensures the safety of the battery by ensuring good electrical isolation between the tabs and the inner wall of the battery case and the separator 1, thereby preventing electrical contact that may cause a short circuit or degradation of battery performance.

[0061] In an optional embodiment, the insulating member 2 includes insulating plates 24 located on both sides in the third direction (the width direction of the partition 1 ).

[0062] Specifically, if Figure 1 and 2 As shown, the insulating member 2 is provided with insulating plates 24 along the two side surfaces protruding from the partition 1, and the insulating plates 24 are arranged opposite to each other in the width direction of the partition 1 to form an enclosure structure. The battery cell can be embedded in the enclosure structure.

[0063] The enclosure structure formed by the insulating plate 24 helps to fix and protect the battery cells, prevent the battery cells from moving during assembly and operation, and keep them stably set in the enclosure structure. This can also reduce damage to the battery cells caused by external impact or vibration, and achieve insulation between the battery cells and the shell.

[0064] Furthermore, the insulating member 2 further includes insulating plates 24 located on both sides in the third direction (the width direction of the partition 1 ).

[0065] The utility model embodiment also provides a battery 6, such as Figure 7-9As shown, the battery 6 includes a first shell 31 and a second shell 32 , and the separator assembly as described above is disposed between the first shell 31 and the second shell 32 .

[0066] Specifically, a first cavity is formed in the first shell 31, a second cavity is formed in the second shell 32, the first cavity accommodates the first battery cell 33, and the second cavity accommodates the second battery cell 34. The partition 1 is used to physically separate the first battery cell 33 from the second battery cell 34.

[0067] The insulating member 2 located on the first side surface of the partition 1 is used to isolate and insulate the first battery cell 33 from the shell; the insulating member 2 located on the second side surface of the partition 1 is used to isolate and insulate the second battery cell 34 from the shell.

[0068] In a preferred embodiment, the insulating member 2 includes a first insulating member 201 and a second insulating member 202 which are relatively arranged in the second direction (length direction) of the partition 1, and the first insulating member 201 and the second insulating member 202 are both provided with an insulating plate 24 in the width direction of the partition 1, so that a retaining structure is formed between the first insulating member 201 and the second insulating member 202, and the battery cell is accommodated in the retaining structure.

[0069] Specifically, if Figure 2 , 8 As shown in FIG. 9 , taking the first battery cell 33 as an example, the length of the insulating member 2 in the third direction of the partition 1 (the width direction of the partition 1) is B, and the length of the first battery cell 33 in the width direction of the partition 1 is D, where D is slightly larger than B, and their difference is greater than or equal to 0 and less than or equal to 1 mm. Such a size design ensures that the first battery cell 33 has an interference fit with the insulating plate 24 in the width direction of the partition 1, so that they can be tightly connected together.

[0070] Similarly, the distance between the insulating members 2 on both sides in the length direction is A, and the length of the first battery cell 33 in the length direction of the partition 1 is C, where C is slightly larger than A, and their difference is greater than or equal to 0 and less than or equal to 1 mm. Such a size design can ensure that the first battery cell 33 has an interference fit with the insulating plate 24 in the length direction of the partition 1, so that they can be tightly connected together.

[0071] Of course, the matching dimensions between the second battery cell 34 and the insulating plate 24 are the same as those of the first battery cell 33 and will not be described in detail.

[0072] Through this design, a compact structure and a close connection are formed between the battery cell and the insulating plate 24, which prevents them from loosening or detaching, thereby ensuring a stable connection between the battery cell and the insulating plate 24.

[0073] Furthermore, such a structural design also helps to prevent the battery cell from moving during assembly and operation, so that it is stably disposed in the housing, thereby reducing damage to the battery cell caused by external impact or vibration.

[0074] Furthermore, the insulating plate 24 is arranged between the first battery cell 33 and the inner wall of the first shell 31, or the insulating plate 24 is arranged between the second battery cell 34 and the inner wall of the second shell 32, so as to separate the battery cell from the shell to prevent direct contact between the battery cell and the shell, which is beneficial to electrical isolation between the battery cell and the shell, and can enhance the safety of the battery 6.

[0075] The battery provided in this embodiment uses the above-mentioned one-piece partition assembly, which helps to simplify the battery assembly process and shorten the time in the production process, thereby significantly improving the production efficiency of battery products and reducing manufacturing costs during large-scale production.

[0076] 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 partition assembly, characterized in that: The partition assembly comprises a partition and an insulating member, wherein the insulating member is injection molded on the partition, and the insulating members are respectively arranged on both sides of the partition in a first direction; and / or, In the second direction, the insulating members are respectively disposed at both ends of the partition.

2. The partition assembly according to claim 1, characterized in that The partition is provided with a groove, and part of the insulating member is received in the groove.

3. The partition assembly according to claim 1, characterized in that The partition assembly further comprises an insulating block, the insulating block is detachably connected to the insulating member, and a channel is provided between the insulating block and the insulating member.

4. The partition assembly according to claim 3, characterized in that The insulating member is provided with a receiving groove communicated with the channel.

5. The partition assembly according to claim 1, characterized in that The insulating member includes insulating plates located on both sides in the third direction.

6. A battery, characterized in that: The battery comprises a first shell, a second shell and a separator assembly according to any one of claims 1 to 5, wherein the separator assembly is disposed between the first shell and the second shell.

7. The battery according to claim 6, characterized in that The battery further includes a battery cell disposed between the first shell and the partition and a battery cell between the second shell and the partition, and the insulating member is disposed between the battery cell and the first shell and / or the second shell in the second direction.

8. The battery according to claim 7, characterized in that The insulating member includes insulating plates located on both sides in a third direction, and the insulating plates are located between the battery core and the first shell and / or the second shell in the third direction.

9. The battery according to claim 7, characterized in that In the second direction, the insulating members are provided at both ends of the partition, the distance between the two insulating members is A, the length of the battery cell is C, wherein 0≤CA≤1mm; and / or, In the third direction, the size of the battery core is D, and the size of the insulating member is B, wherein 0≤DB≤1mm.

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