Battery shell assembly and battery

Abstract

The utility model relates to the technical field of batteries, particularly provides a battery shell assembly and a battery, and aims to solve the problems of low integration level and complex assembly of the conventional battery shell. In order to achieve the purpose, the battery shell assembly comprises a shell and a pole, a first through hole for the pole to penetrate through is formed in the shell, and the battery further comprises an insulating part which penetrates through the first through hole and is formed between the pole and the shell in an injection molding mode. According to the design, the pole and the insulating part are integrated on the shell, and a sealing ring structure is omitted, so that the number of parts is reduced, the structure of the battery is simplified, and the production cost is reduced; and meanwhile, the battery assembly process can be simplified to a certain extent, the battery assembly efficiency is improved, and the battery production speed is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a battery housing component 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, a battery generally includes a cell, a shell for accommodating the cell, and a top cover, wherein the shell and the top cover are two independent parts. The top cover is generally provided with connecting components such as conductive electrode columns, sealing rings, and insulating parts. During assembly, these connecting components and the top cover are generally assembled first, and then the top cover and the shell are connected by welding. In such a solution, the battery shell has a low integration degree, which makes the battery assembly efficiency also low, affecting the battery production speed.

[0004] Accordingly, the art needs a new technical solution for a battery housing 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 that the existing battery housing has low integration and complex assembly.

[0006] In a first aspect, the utility model provides a battery housing assembly, comprising a housing and a pole, wherein the housing is provided with a first through hole through which the pole passes, and the battery housing assembly further comprises an insulating member injection-molded between the pole and the housing.

[0007] Optionally, the pole includes a first part arranged in the shell, the insulating member includes a first insulating portion arranged in the shell, and the first insulating portion is located between the first part and the shell; and / or, the pole includes a second part arranged outside the shell, the insulating member includes a second insulating portion arranged outside the shell, and the second insulating portion is located between the second part and the shell.

[0008] Optionally, the pole includes a connecting portion connecting the first part and the second part, the insulating member includes a third insulating portion connecting the first insulating portion and the second insulating portion, the connecting portion passes through the first through hole, and the third insulating portion is between the connecting portion and the first through hole.

[0009] Optionally, a receiving groove is provided on an end surface of the first insulating portion facing away from the second insulating portion, and the first part is received in the receiving groove.

[0010] Optionally, a first groove is provided on the inner wall of the shell, and part of the first insulating part is accommodated in the first groove; and / or a second groove is provided on the outer wall of the shell, and part of the second insulating part is accommodated in the second groove.

[0011] Optionally, there are multiple poles.

[0012] Optionally, the pole is a positive pole, a negative pole or a voltage sampling pole.

[0013] Optionally, a third groove is provided on a surface of the second portion facing the shell, and part of the second insulating portion is received in the third groove.

[0014] Optionally, the first insulating portion, the second insulating portion and the third insulating portion are integrally formed.

[0015] In a second aspect, the utility model provides a battery, comprising a battery cell and a battery casing as described in any one of the first aspects, wherein the battery cell is accommodated in the battery casing, and the battery cell is electrically connected to the pole.

[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 battery shell assembly of the utility model integrates the pole and the insulating member into the shell, eliminating the structure of the top cover and the sealing ring, which not only reduces the number of parts, simplifies the structure of the battery, and reduces the production cost; at the same time, it can simplify the battery assembly process to a certain extent, improve the battery assembly efficiency, and thus increase the battery production speed. 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 This is one of the exploded schematic diagrams of the battery housing assembly provided by the embodiment of the utility model;

[0020] Figure 2 yes Figure 1 An assembly drawing of the battery housing assembly;

[0021] Figure 3 yes Figure 2 The sectional view taken along the AA section line;

[0022] Figure 4 yes Figure 3 A magnified schematic diagram of the local structure at B in the middle;

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

[0024] Figure 6 This is the second exploded schematic diagram of the battery housing assembly provided by the embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of an insulating member provided by an embodiment of the utility model;

[0026] Figure 8 yes Figure 6 An assembly drawing of the battery housing assembly;

[0027] Fig. 9 yes Figure 8 A cross-sectional view taken along the CC section line;

[0028] Fig.10 yes Fig. 9 A partial enlarged schematic diagram of point D in the middle;

[0029] Fig.11 It is a schematic diagram of an explosion of a battery structure provided by an embodiment of the utility model.

[0030] Reference numerals list :

[0031] 1-shell, 101-first wall, 102-first groove, 103-second groove, 111-first through hole, 112-second through hole, 1001-first shell, 1002-second shell, 12-pole, 121-first part, 122-second part, 123-connecting part, 1201-positive pole, 1202-negative pole, 1203-sampling pole, 13-insulating member, 131-first insulating part, 132-second insulating part, 133-third insulating part, 134-accommodating groove, 135-first protrusion, 136-first embedded groove, 137-second embedded groove, 138-third through hole, 139-fourth through hole, 14-first battery cell, 15-second battery cell, 16-rivet block, 161-third groove, 17-partition. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Please refer to Figures 1 to 11 , an embodiment of the utility model provides a battery housing assembly.

[0036] like Figure 1 and 4 As shown, the battery housing assembly includes a housing 11, a pole 12, and an insulating member 13. A first through hole 111 is provided on a first wall 101 at one end of the battery housing 1. The pole 12 passes through the first through hole 111. An insulating member 13 is provided between the housing 1 and the pole 12, and the insulating member 13 is injection molded between the housing 1 and the pole 12 to form an insulating connection between the housing 1 and the pole 12.

[0037] Specifically, one end of the pole 12 is located in the housing 1, and is used to be electrically connected to the pole lug of the battery cell in the housing 1; the other end of the pole 12 extends out of the housing 1 through the first through hole 111, and is used to be electrically connected to an external circuit to output the electric energy of the battery cell. The insulating member 13 is located between the housing 1 and the pole 12, which can not only achieve electrical isolation between the two, but also play a sealing role to prevent leakage of the electrolyte, thereby increasing the safety of the battery.

[0038] This design integrates the pole 12 and the insulating member 13 into the shell 1, eliminating the top cover and the sealing ring structure, which not only reduces the number of parts, simplifies the battery structure, and reduces production costs; at the same time, it can simplify the battery assembly process to a certain extent, improve the battery assembly efficiency, and thus increase the battery production speed.

[0039] The pole 12 passes through the first through hole 111 on the first wall 101 at the end of the housing 1 along the first direction (the first direction in this embodiment is the length direction of the housing 1). The pole 12 located inside the housing 1 is the first part 121 of the pole 12, the pole 12 located outside the housing 1 is the second part 122 of the pole 12, and the pole 12 that passes through the first through hole 111 of the housing 1 and connects the first part 121 and the second part 122 is the connecting part 123 of the pole 12.

[0040] First of all, it is necessary to understand that nano-injection molding technology can produce composite parts with complex geometric structures and fine features in a single process. For the battery housing 1 and the insulating part 13, this technology allows the two to be more closely combined at the microscopic level.

[0041] Specifically, if Figure 4 and 5 As shown, the first wall 101 at the end of the housing 1 is integrally formed with the insulating member 13 in the form of being partially embedded therein. The insulating member 13 includes a first insulating portion 131 located inside the housing 1 and a second insulating portion 132 located outside the housing 1 .

[0042] Such a structure is equivalent to the insulating member 13 "wrapping" part of the first wall 101 of the shell 1. When the pole 12 passes through the first wall 101 of the shell 1, due to the existence of the first insulating part 131 and the second insulating part 132, the pole 12 is completely electrically isolated from the first wall 101 of the shell 1 to prevent short circuits and other electrical problems.

[0043] Furthermore, if Figure 5 As shown, the inner surface of the first wall 101 of the shell 1 is provided with a plurality of first grooves 102, and the first insulating portion 131 is partially received in the first grooves 102. The two are injection molded in such a structural form by nano injection molding process, so that the boundary where the first insulating portion 131 contacts the inner surface of the first wall 101 is seamlessly connected at the nano level.

[0044] Furthermore, if Figure 5 As shown, the outer surface of the first wall 101 of the shell 1 is provided with a plurality of second grooves 103, and the second insulating portion 132 is partially received in the second grooves 103. The two are injection molded in such a structural form by nano injection molding process, so that the boundary where the second insulating portion 132 contacts the outer surface of the first wall 101 is seamlessly connected at the nano level.

[0045] Furthermore, if Figure 4 and 5 As shown, the first insulating portion 131 is located between the inner wall of the first wall 101 of the housing 1 and the first portion 121 of the pole 12 , and the second insulating portion 132 is located between the outer wall of the first wall 101 of the housing 1 and the second portion 122 of the pole 12 .

[0046] A third insulating portion 133 is further provided between the first insulating portion 131 and the second insulating portion 132 to connect the two.

[0047] Specifically, the third insulating part 133 passes through the first through hole 111 along the first direction (i.e., the length direction of the shell 1), and the insulating member 13 is provided with a third through hole 138 that passes through the main body of the insulating member 13 along the first direction. The third through hole 138 passes through the first insulating part 131, the second insulating part 132 and the third insulating part 133 in sequence along the first direction.

[0048] The third through hole 138 has a smaller diameter than the first through hole 111, and penetrates the first through hole 111 along the first direction. In other words, the third insulating portion 133 is located between the outer circumference of the connecting portion 123 of the pole 12 and the inner circumference of the first through hole 111. This is equivalent to the insulating member 13 covering the hole wall of the first through hole 111 so that the pole 12 maintains an insulated connection with the housing 1 when passing through the first through hole 111.

[0049] The pole 12 passes through the third through hole 138 and extends out of the second insulating portion 132 , thereby being electrically connected to an external circuit.

[0050] In an optional embodiment, if Figure 4 As shown, the end surface of the first insulating portion 131 facing away from the second insulating portion 132 is provided with a receiving groove 134, or in other words, the end surface of the first insulating portion 131 facing the first portion 121 of the pole 12 is provided with a receiving groove 134. The first portion 121 of the pole 12 is embedded in the receiving groove 134. Such a structure can stably set the pole 12 in the insulating member 13, ensure the electrical isolation between the first portion 121 and the first wall 101 of the housing 1, and thus prevent the occurrence of electrical short circuit problems.

[0051] Furthermore, the pole 12 passes through the second insulating portion 132 to be connected to an external circuit.

[0052] In an optional embodiment, if Figure 1 and 4 As shown, the pole 12 passes through the second insulating portion 132 and is electrically connected to the rivet block 16. The rivet block 16 is a conductive member, which is generally made of metal material. The pole 12 can be electrically connected to an external circuit through the rivet block 16.

[0053] Specifically, if Figure 4As shown, a first protrusion 135 is provided on one side of the second insulating portion 132 facing the riveting block 16, and a third groove 161 is provided on the riveting block 16 to cooperate with the first protrusion 135, and the first protrusion 135 is inserted into the third groove 161. Such a structural design realizes a stable and fixed connection between the second insulating portion 132 and the riveting block 16, and also ensures a stable electrical connection between the pole 12 and the riveting block 16.

[0054] Furthermore, if Figure 1 and 4 As shown, the second insulating portion 132 is further provided with a first embedding groove 136 adapted to the contour of the rivet block 16 on one side thereof facing the rivet block 16. The first embedding groove 136 provides a joint surface so that the rivet block 16 can be embedded in the first embedding groove 136 to accurately position the assembly position of the rivet block 16 and the second insulating portion 132.

[0055] Such a structural design is not only conducive to the stability of the battery electrical connection, but also ensures the accuracy and stability of the entire assembly process, while making the installation process easier to operate and convenient for maintenance and disassembly. Furthermore, it can also increase the structural stability of the battery and reduce the risk of problems such as poor contact caused by vibration or external force.

[0056] Furthermore, since the insulating member 13 can be partially formed by injection molding, the complex structural parts in the assembly structure are allocated to the insulating member 13. Although the structural design is relatively complex, it is easier to implement than mechanical processing. For example, if the first protrusion 135 and the first embedding groove 136 are formed by mechanical processing, the process is relatively complicated, while injection molding is more economical and faster. This can not only greatly reduce the production cost, but also improve the production efficiency of the battery.

[0057] In a preferred embodiment, the first insulating part 131, the second insulating part 132 and the third insulating part 133 are integrally injection molded, which can reduce the assembly process, make the matching between the various parts of the insulating member 13 more precise, make the processing easier and more convenient, and reduce the production time and production cost.

[0058] Furthermore, the integrated structure is that the various parts of the insulating member 13 are connected together. Compared with the split structure, this can make the insulating member 13 provide better stability and strength, and can also make the sealing between the shell 1, the insulating member 13 and the pole 12 better.

[0059] In an optional embodiment, the pole 12 may have various specific forms, for example, Figure 1 As shown, the pole 12 is in the form of a positive pole 1201, such as Figure 6As shown, the pole 12 is in the form of a negative pole 1202 and a sampling pole 1203, wherein the sampling pole 1203 is used for sampling voltage.

[0060] It should be noted that the above connection form and structural form of the pole 12 with the housing 1 and the insulating member 13 are also applicable to the positive pole 1201 , the negative pole 1202 and the sampling pole 1203 .

[0061] In an optional embodiment, if Figure 6-10 As shown, the negative pole 1202 and the sampling pole 1203 are arranged at the same end. Figure 7 and 10 As shown, the shell 1 is provided with a second through hole 112 spaced apart from the first through hole 111 in the width direction; the insulating member 13 extends in the width direction of the shell 1, and similar to the structure of the third through hole 138, the insulating member 13 is provided with a fourth through hole 139 along the first direction, i.e., the length direction of the shell 1, for the sampling pole 1203 to pass through.

[0062] It should be noted that since the sampling pole 1203 is used to collect the voltage in the battery, the sampling pole 1203 is not connected to the riveting block 16 after passing through the insulating member 13 .

[0063] Furthermore, if Figure 6 , 7 As shown in Figure 10, a second embedding groove 137 that matches the shape of the sampling pole 1203 protrudes around the fourth through hole 139 on the end surface of the second insulating portion 132 (i.e., the side facing the riveting block 16), so that the sampling pole 1203 can be stably set in the second embedding groove 137 and then stably set in the insulating member 13, ensuring electrical isolation between the sampling pole 1203 and the first wall 101 of the housing 1, thereby preventing the occurrence of electrical short circuit problems.

[0064] The utility model further provides a battery, which includes a battery cell and the battery casing 1 as described above. The battery cell is accommodated in the battery casing 1 , and the battery cell is electrically connected to a pole 12 .

[0065] Specifically, please refer to Figure 1 and Figure 6 , and combined with Fig.11 As shown in the figure, the battery includes a first shell 1001, and a positive pole 1201 is provided at the end of the first shell 1001; a second shell 1002, and a negative pole 1202 and a sampling pole 1203 are provided at the end of the second shell 1002.

[0066] A partition 17 is provided between the first shell 1001 and the second shell 1002, and the partition 17 is used to divide the first shell 1001 and the second shell 1002 into a first chamber and a second chamber. The first chamber is used to accommodate the first battery cell 14, and the first battery cell 14 is electrically connected to the positive electrode column 1201; the second chamber is used to accommodate the second battery cell 15, and the second battery cell 15 is electrically connected to the negative electrode column 1202.

[0067] Such a battery adopts the above-mentioned one-piece molded shell 1. Since the one-piece molded shell 1 helps to simplify the battery assembly process and shorten the time in the production process, it can significantly improve the production efficiency of battery products and reduce manufacturing costs during large-scale production.

[0068] In addition, due to its simplified design, the one-piece molded shell 1 has a higher utilization rate of its internal space, which is not only more convenient to assemble, but also can reserve more space for other components in the battery. For example, it can increase the volume of the battery cell to a certain extent, thereby increasing the capacity of the battery, creating conditions for improving battery performance.

[0069] 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 housing assembly, characterized in that: The battery housing assembly comprises a housing and a pole. The housing is provided with a first through hole through which the pole passes. The battery housing assembly further comprises an insulating member injection-molded between the pole and the housing.

2. The battery housing assembly according to claim 1, characterized in that: The pole comprises a first portion disposed in the housing, the insulating member comprises a first insulating portion disposed in the housing, and the first insulating portion is located between the first portion and the housing; and / or, The pole includes a second portion disposed outside the shell, and the insulating member includes a second insulating portion disposed outside the shell, wherein the second insulating portion is located between the second portion and the shell.

3. The battery housing assembly according to claim 2, characterized in that: The pole includes a connecting portion connecting the first portion and the second portion, the insulating member includes a third insulating portion connecting the first insulating portion and the second insulating portion, the connecting portion passes through the first through hole, and the third insulating portion is between the connecting portion and the first through hole.

4. The battery housing assembly according to claim 3, characterized in that: An end surface of the first insulating portion facing away from the second insulating portion is provided with a receiving groove, and the first part is received in the receiving groove.

5. The battery housing assembly according to claim 2, characterized in that: A first groove is provided on the inner wall of the housing, and part of the first insulating portion is received in the first groove; and / or, A second groove is provided on the outer wall of the shell, and part of the second insulating part is received in the second groove.

6. The battery housing assembly according to claim 1, characterized in that: There are a plurality of poles.

7. The battery housing assembly according to claim 6, characterized in that: The pole is a positive pole, a negative pole or a voltage sampling pole.

8. The battery housing assembly according to claim 3, characterized in that: A third groove is formed on a surface of the second portion facing the housing, and a portion of the second insulating portion is received in the third groove.

9. The battery housing assembly according to claim 3, characterized in that: The first insulating portion, the second insulating portion and the third insulating portion are integrally formed.

10. A battery, characterized in that: The battery comprises a battery cell and a battery housing assembly as described in any one of claims 1 to 9, wherein the battery cell is accommodated in the housing, and the battery cell is electrically connected to the pole.

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