battery

Abstract

The utility model relates to the field of lithium ion battery discloses a battery. Include: casing, when the first, second shell mouth opposite buckling, each side wall's end face is pasted, in the two width end of casing, be equipped with recess on the side wall of one of first, second shell, be equipped with first thinning tab on the end face of the side wall of another, when the shell mouth opposite buckles, the first thinning tab is inserted in the recess, in the two length side of casing, be equipped with second thinning tab on the side wall of first shell and second shell, each second thinning tab on one of first, second shell, each thinning recess is respectively with each thinning recess on the other of first, second shell, when the first, second shell mouth opposite buckling, each second thinning tab is inserted in its corresponding thinning recess respectively, and is buckled and is locked in the thinning recess, battery body, encapsulation in the space between first, second shell, electrode and power supply connecting piece on casing electricity is connected.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a battery structure. Background Technology

[0002] With the increasingly widespread application of batteries, especially lithium-ion batteries, more and more devices are using lithium-ion batteries, and the operating environments are becoming increasingly complex and diverse. As the application of lithium-ion batteries becomes more widespread, market competition is intensifying, and the requirements for space utilization and capacity improvement of lithium-ion battery packs are becoming increasingly stringent.

[0003] During the research process of this invention, the inventors discovered that the assembly and fit stability of current lithium-ion battery packs is relatively lacking. Summary of the Invention

[0004] One of the objectives of this utility model embodiment is to provide a battery that improves the assembly stability of the battery.

[0005] This utility model provides a battery comprising:

[0006] The housing includes a first housing and a second housing. When the openings of the first housing and the second housing are engaged, the end faces of the side walls of the first housing and the second housing are in contact with each other.

[0007] At both width ends of the housing, a groove is provided on the side wall of one of the first and second housings, with the groove opening located on the end face of the side wall where it is located. On the end face of the other side wall of the first and second housings, a first thinning protrusion is provided, which protrudes from the end face and is thinner than the side wall where it is located. When the openings of the first and second housings are fastened together, the first thinning protrusion is inserted into the groove and locked in the groove.

[0008] On both length sides of the housing, the sidewalls of the first and second housings are provided with laterally recessed thinning recesses and second thinning tabs that protrude from the end face and are thinner than the sidewalls on which they are located. Each second thinning tab and each thinning recess on one of the first and second housings corresponds one-to-one with each thinning recess and each second thinning tab on the other of the first and second housings. When the openings of the first and second housings are fastened together, each second thinning tab is inserted into its corresponding thinning recess and locked in the thinning recess.

[0009] The battery body is encapsulated in the space between the first shell and the second shell, and the electrodes are electrically connected to the power connector on the shell.

[0010] Optionally, the sidewalls at the two width ends of the first shell and the second shell are thicker than the sidewalls at the two length ends, and are also thicker than the shell surfaces.

[0011] Optionally, at the first width end where the two power connectors are located, at least two of the first thinning tabs are provided, and the positions of the at least two first thinning tabs correspond to the two power connectors.

[0012] At the second width end, at least one first thinning tab is provided that is offset from each of the first thinning tabs at the first width end.

[0013] Optionally, a protruding first male buckle is provided on the side of each of the first thinning tabs.

[0014] Each of the grooves has a first female buckle on its groove wall. When each of the first thinning protrusions is inserted into its corresponding groove, the first male buckle and the first female buckle on it are respectively snapped and locked.

[0015] Optionally, each of the first male buckles is disposed on the inner side of each of the first thinning protrusions.

[0016] Optionally, each of the first male buckles does not extend beyond the sidewall of the housing.

[0017] Optionally, each of the thinning recesses is located on the inner wall of the sidewall in which it is located.

[0018] Optionally, a raised second male buckle is provided on the side of each of the aforementioned thinning recesses.

[0019] Each of the second thinning protrusions is provided with a second female buckle. When each of the second thinning protrusions is inserted into its corresponding thinning recess, the second male buckle and the second female buckle on it are respectively snapped and locked.

[0020] Optionally, each of the second male buckles does not extend beyond the inner wall of the housing.

[0021] Optionally, two copper tubes are provided at one width end of the housing as two power supply connectors.

[0022] As can be seen from the above, the battery pack structure of this embodiment is flexible in assembly, can adapt to various application scenarios, and is conducive to the application and promotion of lithium-ion batteries. Attached Figure Description

[0023] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention.

[0024] Figure 1 A schematic diagram of the battery casing assembly structure provided in an embodiment of this utility model;

[0025] Figure 2 A three-dimensional structural diagram of the battery casing provided in an embodiment of this utility model;

[0026] Figure 3 A front view structural schematic diagram of the battery casing provided in an embodiment of this utility model;

[0027] Figure 4 for Figure 3 A schematic diagram of the AA cross-sectional structure;

[0028] Figure 5 for Figure 3 Schematic diagram of the BB cross-sectional structure;

[0029] Figure 6 Top and bottom views of the battery casing provided in an embodiment of this utility model;

[0030] Figure 7 A side view of the battery casing provided in an embodiment of the present utility model;

[0031] Figure 8 A top view of the first shell of the battery housing provided in an embodiment of this utility model;

[0032] Figure 9 A three-dimensional structural diagram of the first shell of the battery housing provided in an embodiment of this utility model;

[0033] Figure 10 This is a schematic diagram of the main structure of the first shell of the battery housing provided in an embodiment of the present utility model;

[0034] Figure 11 A side view of the first shell of the battery housing provided in an embodiment of this utility model;

[0035] Figure 12 Another perspective structural schematic diagram of the first shell of the battery housing provided in this embodiment of the present utility model;

[0036] Figure 13 A top view of the second shell of the battery housing provided in an embodiment of this utility model;

[0037] Figure 14 A three-dimensional structural diagram of the second shell of the battery housing provided in an embodiment of this utility model;

[0038] Figure 15 This is a schematic diagram of the main structure of the second shell of the battery housing provided in an embodiment of the present utility model;

[0039] Figure 16 A right-side view of the structure of the second shell of the battery housing provided in an embodiment of this utility model;

[0040] Figure 17This is another three-dimensional structural diagram of the second shell of the battery housing provided in an embodiment of the present utility model.

[0041] 1: First shell;

[0042] 2: Second shell;

[0043] 3: Shell surface;

[0044] 4: Side wall;

[0045] 5: Groove; 15: First female buckle;

[0046] 6: Thinning recess; 16: Second male buckle;

[0047] 17: First thinning tab; 18: First male buckle;

[0048] 27: Second thinning tab 27; 37: Second female buckle Detailed Implementation

[0049] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. Example

[0050] See Figures 1-17 As shown.

[0051] This embodiment provides a battery structure, which may be, but is not limited to, a lithium-ion battery. It mainly includes a casing and a battery body fixed within the casing.

[0052] The housing in this embodiment includes a first shell 1 and a second shell 2 (commonly referred to as the lower shell and the upper shell). The first shell 1 and the second shell 2 each have an open shell opening. Opposite to the shell opening is a closed shell surface 3. Around the shell opening are side walls 4 extending from the shell opening to the closed shell surface 3. The side walls 4 surround the outer periphery of the closed shell surface 3.

[0053] During assembly, the openings of the first shell 1 and the second shell 2 are aligned, and the end faces of the side walls 4 are fastened together, forming a closed chamber between the first shell 1 and the second shell 2. The battery body (not shown in the figure, but various rechargeable batteries or battery packs in the prior art) is fixed in the chamber.

[0054] For ease of description, the following illustration uses a rectangular shell, but it is not limited to this and can actually be other irregular shapes.

[0055] Let the two narrower ends of the shell be the width ends of the shell, and the two opposite sides located between the two width ends be the length ends.

[0056] See Figures 1-12As shown, a groove 5 is provided on the end face of the side wall 4 at both width ends of the first shell 1, which is recessed in the direction of the shell surface, and the groove opening of the groove 5 is located on the end face of the side wall 4.

[0057] Thinning recesses 6 and thinning protrusions (denoted as second thinning protrusions 27) are provided on both opposite sidewalls 4 along the length of the first shell 1. The thinning recesses 6 are located on one side of the sidewall 4 (preferably, but not limited to, the inner side), extending to the end face of the sidewall and laterally recessed relative to it. The wall thickness at the location of the thinning recess 6 is thinner than the wall thickness at other locations on the sidewall on that side. The second thinning protrusion 27 is located on the end face of the sidewall 4, protruding from the end face. The thickness of the second thinning protrusion 27 is thinner than the wall thickness of the sidewall 4 on which it is located, ensuring that neither side of the second thinning protrusion 27 extends beyond the sides of the sidewall.

[0058] See Figures 1-7 As shown in Figures 13-17, the structure of the second shell 2 is as follows: Assuming the shell opening faces upwards, thinning tabs (denoted as first thinning tabs 17) are provided on the end faces of the side walls 4 at both width ends of the second shell 2. The first thinning tab 17 protrudes from the end face of the side wall 4 where it is located, and its thickness is less than the wall thickness of the side wall 4, ensuring that neither side of the first thinning tab 17 extends beyond the sides of the side wall. The protrusion height of the first thinning tab 17 is equal to or slightly less than the groove depth of the groove 5 on the first shell 1.

[0059] Thinning recesses 6 and second thinning tabs 27 are respectively provided on the two side walls 4 on the length side of the second shell 2. Each thinning recess 6 and each second thinning tab 27 on the second shell 2 corresponds to each second thinning tab 27 and each thinning recess 6 on the first shell 1. The second thinning tab 27 on any shell can be inserted into the thinning recess 6 on the other shell and locked tightly with a snap fastener.

[0060] During assembly, the openings of the first shell 1 and the second shell 2 are aligned, and the end faces of the side walls 4 are tightly pressed together. At both width ends of the shells, each of the first thinning protrusions 17 of the second shell 2 is fully inserted into the groove 5 of the first shell 1. Matching latching parts are provided on the opposite sides of the first thinning protrusions 17 and the groove 5, so that the first thinning protrusions 17 are locked in the groove 5 after insertion, preventing them from being pulled out or shifted without external force. The end faces of the side walls 4 at both width ends of the first shell 1 and the second shell 2 are tightly locked together.

[0061] At each of the two length ends of the housing, each second thinning protrusion 27 on either the first shell 1 or the second shell 2 corresponds one-to-one with a thinning recess 6 on the other of the first shell 1 or the second shell 2, and each thinning recess 6 on either the first shell 1 or the second shell 2 corresponds one-to-one with a second thinning protrusion 27 on the other of the first shell 1 or the second shell 2, with matching shapes and positions. When the openings of the first shell 1 and the second shell 2 are fastened together, each second thinning protrusion 27 on the length side is fully inserted into its corresponding thinning recess 6, and a matching latching part is provided on the opposite side of each corresponding thinning recess 6 and the second thinning protrusion 27. After the second thinning protrusion 27 is inserted, the latching part is tightly locked onto the thinning recess 6, preventing it from being pulled out or shifted without external force. The side walls 4 of the first shell 1 and the second shell 2 on the length side are tightly locked together with their end faces touching.

[0062] In application, the first shell 1 can be placed on the platform with its opening facing upwards, and the battery body can be placed inside the cavity of the first shell 1. The electrodes of the battery body can be electrically connected to the power connector mounted on a wide end of the first shell 1. Then, the second shell 2 can be fastened to the opening of the first shell 1 with its opening facing downwards. The battery body can be sealed in the cavity between the first shell 1 and the second shell 2 using the snap-fit ​​connection method described above, thus completing the battery casing assembly.

[0063] As an illustration of this embodiment, the first shell 1 and the second shell 2 may be at the same height or at different heights.

[0064] As can be seen from the above, by adopting the technical solution of this embodiment, the four side walls 4 of the battery casing are respectively snapped and locked together, and each snap-connection part adopts a thinning design so that the thickness of the snap-connection part does not exceed the thickness of the side wall 4 where it is located, and does not occupy the battery assembly capacity space inside the casing, which is conducive to increasing the capacity of the battery body.

[0065] Compared to technical solutions that connect only at the width end or only at the length end, this embodiment uses snap-fit ​​connections on all four side walls 4 of the casing. The connection tightness of the battery casing in this embodiment is more reliable, and the casing is less prone to deformation and loosening due to factors such as uneven weight distribution inside the casing.

[0066] In addition, the battery's power connector is installed at one wide end of the battery. Specifically, after the battery body (not shown in the figure) is placed inside the first shell 1, two pairs of copper tubes (not shown in the figure) are fixed inside the first shell 1 near its wide end as power connectors. The electrodes of the battery body are electrically connected to the two copper tubes through wires or an adapter plate. Then, the second shell 2 is fastened to the opening of the first shell 1 to form a closed shell. The weight of the two wide ends of the battery is uneven. The sidewalls 4 of the two wide ends adopt a connection structure in which the first thinning protrusion 17 is inserted into the groove 5 and then locked. This helps to ensure the tightness and reliability of the connection between the two wide ends, and avoids the problem of the shell becoming loose due to the uneven weight of the shell. This ensures the positioning accuracy of the connection between the sidewalls 4 of the two wide ends of the shell and ensures the reliability of the connection.

[0067] As an illustration of this embodiment, at one width end where the power connector is located, two shorter first thinning protrusions 17 are provided on the side wall 4 of the second housing 2. The positions of the two first thinning protrusions 17 correspond to the positions of the two power connectors, respectively. At the other width end, a wider first thinning protrusion 17 is provided, located between the two first thinning protrusions 17 at the other width end. This structure is beneficial for adapting to the uneven gravity inside the housing caused by the power connector, improving the stress balance of the housing, and enhancing the fit reliability of the housing.

[0068] As an illustration of this embodiment, a wider latching portion can be provided on the wider first thinning protrusion 17, or two or more separate latching portions (such as a protruding male latch) can be provided to perform multi-latch latching and locking with the two latching portions (such as a recessed female latch) in the groove 5 on the width side, thereby enhancing the reliability of the connection between the housings.

[0069] As an illustration of this embodiment, the wall thickness of the sidewalls 4 on the two length sides of the first shell 1 and the second shell 2 is the same as the wall thickness of the closed shell surface 4 above them, and both are thinner than the sidewalls 4 at the two width ends of the first shell 1 and the second shell 2. This design ensures, on the one hand, that the thickness at the width ends guarantees the strength of the two width ends and facilitates the setting of the groove 5; on the other hand, the thinning design of the length sides and the closed shell surface helps to increase the battery assembly capacity space inside the shell, which is beneficial to increasing the battery capacity.

[0070] As an illustration of this embodiment, on the inner side (facing the cavity side of the housing) of each of the first thinning protrusions 17 on the sidewalls 4 at both width ends, there are protruding male buckles (denoted as first male buckles 18), and the two sides of each first male buckle 18 do not extend beyond the two sides of the sidewall 4 below the first thinning protrusion 17. The thickness of the first thinning protrusion 17 at the location of each first male buckle 18 is thinner than the thickness of the sidewall 4 at the location of it. Correspondingly, female buckles (denoted as first female buckles 15) are provided on the groove walls of the grooves 5 at both width ends. Each first male buckle 18 and each first female buckle 15 of the groove 5 are engaged. The engaging parts do not extend beyond the two sides of the sidewalls 4 of the housing, and do not occupy the battery assembly space inside the housing, which is beneficial to increasing the battery capacity. Moreover, after assembly, each engaging part is located inside the housing and is not visible from the outside, which is beneficial to improving the consistency and aesthetics of the housing appearance.

[0071] As an illustration of this embodiment, on the length side of the housing, each thinning recess 6 is provided on the inner side of the side wall 4 of the first housing 1 and the second housing 2. The recess depth of the thinning recess 6 from the inside to the outside is equal to or greater than the thickness of the second thinning protrusion 27 corresponding to the thinning recess 6. After the second thinning protrusion 27 is inserted and closely attached to the thinning recess 6, the thickness at this position is equal to or less than the wall thickness of the side wall 4, which does not occupy the battery assembly space inside the housing and is beneficial to improving the battery capacity.

[0072] As an illustration of this embodiment, the height of the thinning recess 6 from the end face to the shell surface 3 is equal to or greater than the height of the second thinning protrusion 27 corresponding to the thinning recess 6, so that after the second thinning protrusion 27 is inserted and closely attached to the thinning recess 6, the end faces of the side walls 4 of the first shell 1 and the second shell 2 are attached to each other, the fit is tight, and the product appearance is consistent.

[0073] As an illustration of this embodiment, the latching part on each thinning recess 6 is a laterally protruding male latch (referred to as the second male latch 16). The thickness of the highest point of the protrusion of each second male latch 16 is equal to or slightly less than the original wall thickness, so that each second male latch 16 does not occupy the battery assembly space inside the casing, which is beneficial to improving the battery capacity.

[0074] As an illustration of this embodiment, the latching portions provided on each of the second thinning protrusions 27 are all female latches (denoted as second female latches 37), which may be, but are not limited to, holes. When each of the second thinning protrusions 27 is inserted into its corresponding thinning recess 6, each second male latch 16 and each second female latch 37 are latched and locked, and the thickness at the latching position is equal to or slightly less than the original wall thickness. This eliminates the need to occupy battery assembly space within the casing, which is beneficial for increasing battery capacity.

[0075] As an illustration of this embodiment, the first shell 1 and the second shell 2 of this embodiment are plastic shells, and each of the thinning recesses 6, grooves 5, first thinning protrusions 17, second thinning protrusions 27, and buckling parts on them are integrally injection molded in the first shell 1 or the second shell 2 where they are located.

[0076] As an illustration of this embodiment, marking portions are respectively provided on the shell surfaces 3 of the first shell 1 and the second shell 2. Each marking portion may be, but is not limited to, a recessed portion or a raised portion integrally molded by injection molding. The marking portions may include, but are not limited to, electrode "+", "-" terminals, product series identifiers, etc.

[0077] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. A battery, characterized in that it comprises: The housing includes a first housing and a second housing. When the openings of the first housing and the second housing are engaged, the end faces of the side walls of the first housing and the second housing are in contact with each other. At both width ends of the housing, a groove is provided on the side wall of one of the first and second housings, with the groove opening located on the end face of the side wall where it is located. On the end face of the other side wall of the first and second housings, a first thinning protrusion is provided, which protrudes from the end face and is thinner than the side wall where it is located. When the openings of the first and second housings are fastened together, the first thinning protrusion is inserted into the groove and locked in the groove. On both length sides of the housing, the sidewalls of the first and second housings are provided with laterally recessed thinning recesses and second thinning tabs that protrude from the end face and are thinner than the sidewalls on which they are located. Each second thinning tab and each thinning recess on one of the first and second housings corresponds one-to-one with each thinning recess and each second thinning tab on the other of the first and second housings. When the openings of the first and second housings are fastened together, each second thinning tab is inserted into its corresponding thinning recess and locked in the thinning recess. The battery body is encapsulated in the space between the first shell and the second shell, and the electrodes are electrically connected to the power connector on the shell.

2. The battery according to claim 1, characterized in that, The sidewalls at the two width ends of the first shell and the second shell are thicker than the sidewalls at the two length ends, and are also thicker than the shell surfaces.

3. The battery according to claim 1, characterized in that, At the first width end where the two power connectors are located, at least two of the first thinning tabs are provided, and the positions of the at least two first thinning tabs correspond to the two power connectors. At the second width end, at least one first thinning tab is provided that is offset from each of the first thinning tabs at the first width end.

4. The battery according to claim 1, characterized in that, Each of the first thinning tabs has a raised first male buckle on its side. Each of the grooves has a first female buckle on its groove wall. When each of the first thinning protrusions is inserted into its corresponding groove, the first male buckle and the first female buckle on it are respectively snapped and locked.

5. The battery according to claim 4, characterized in that, include: Each of the first male buckles is respectively provided on the inner side of each of the first thinning protrusions.

6. The battery according to claim 4, characterized in that, Each of the first male buckles does not extend beyond the side wall of the housing.

7. The battery according to claim 1, characterized in that, Each of the aforementioned thinning recesses is located on the inner wall of the side wall in which it is located.

8. The battery according to claim 1, characterized in that, A raised second male buckle is provided on the side of each of the aforementioned thinning recesses. Each of the second thinning protrusions is provided with a second female buckle. When each of the second thinning protrusions is inserted into its corresponding thinning recess, the second male buckle and the second female buckle on it are respectively locked.

9. The battery according to claim 8, characterized in that, Each of the second male buckles does not extend beyond the inner wall of the housing.

10. The battery according to claim 1, characterized in that, Two copper tubes are respectively provided at one width end of the housing as two power supply connectors.

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