Cover plate assembly, battery cell, battery pack and electric equipment

Abstract

The utility model provides a cover plate assembly which is characterized in that the cover plate assembly comprises a pole terminal, a first magnetic sheet and a second magnetic sheet, the first magnetic sheet is embedded in one end of the pole terminal, and the first magnetic sheet and the second magnetic sheet attract each other and can be used for clamping a tab so as to connect the tab and the pole terminal. According to the cover plate assembly in the scheme, the tab and the pole of the battery cell are connected by utilizing a magnetic attraction principle, so that the problem that the existing tab and pole connecting structure is complicated is solved, and the tab and the pole terminal are simply and quickly connected without welding.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly for a battery core. Background Art

[0002] In current battery packs, the connection between the cell tabs and the poles is mostly made by traditional welding, and a connecting piece is required with one end connected to the tab and the other end connected to the pole. Some individual solutions involve magnetic connection, but too many strong magnetic pieces are provided and connecting pieces are still retained. The connection structure of the above solutions is relatively complex and the connection is not convenient enough. Utility Model Content

[0003] The utility model provides a cover plate assembly, which utilizes the magnetic attraction principle to achieve connection between a pole ear and a pole column of a battery core, thereby solving the problem of complex connection structure between the existing pole ear and the pole column.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] According to the first aspect of the utility model, a cover plate assembly is provided, which includes a pole terminal, a first magnetic sheet and a second magnetic sheet, wherein the first magnetic sheet is embedded in one end of the pole terminal, and the first magnetic sheet and the second magnetic sheet are attracted to each other and can be used to clamp the pole ear to connect the pole ear and the pole terminal.

[0006] Optionally, the pole terminal has two ends, one end of which is exposed to the outside and electrically connected to the outside of the battery cell, and the other end is provided with a groove for embedding the first magnetic sheet.

[0007] Optionally, the area of ​​the first magnetic sheet is smaller than the area of ​​the second magnetic sheet.

[0008] Optionally, the cover plate assembly further includes a pole, the center of the pole is a through hole, the pole terminal is embedded in the through hole of the pole, and the end faces of the pole terminal are respectively flush with the adjacent end faces of the pole.

[0009] Optionally, the cover plate assembly further includes a cover plate, a hole is provided at the center of the cover plate, and the hole is used for connecting with the pole.

[0010] Optionally, the cover plate assembly further comprises a clamping piece, which is used to be sleeved on the cylindrical surface of the pole excluding the end surface to achieve interference fit with the central hole of the cover plate.

[0011] Optionally, the cover plate assembly further includes a spacer, which is arranged on a side of the cover plate close to the battery cell body, and the center of the spacer is a through hole, and the through hole corresponds to the center position and size of the center through hole of the cover plate.

[0012] Optionally, a slot is provided on one side of the spacer, the slot is located at an edge of a through hole of the spacer close to a side surface of the battery cell body, and the second magnetic sheet is clamped in the slot.

[0013] According to the second aspect of the utility model, a battery cell is provided, comprising the above-mentioned cover plate assembly and a pole core body, wherein the pole ear of the pole core body is placed on the first magnetic sheet of the cover plate assembly, and the second magnetic sheet of the cover plate assembly is clamped in the slot and is attracted and clamped with the first magnetic sheet to connect the pole ear and the pole column.

[0014] According to a third aspect of the present invention, a battery pack is provided, comprising the above-mentioned multiple battery cells and a battery pack shell, wherein the multiple battery cells are accommodated in the battery pack shell.

[0015] According to a fourth aspect of the present invention, there is provided an electrical device, comprising the above-mentioned battery pack and an electrical device, wherein the battery pack is used to supply power to the electrical device.

[0016] The utility model provides a cover plate assembly, which realizes the connection between the pole ear and the pole post of the battery core by utilizing the magnetic attraction principle, solves the problem of complex structure of the existing connection between the pole ear and the pole post, and realizes the non-welding, simple and fast connection between the pole ear and the pole post terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic diagram of the cover plate assembly of the utility model without a magnetic sheet;

[0019] Figure 2 It is a top view of the partial structure of the cover plate assembly of the utility model;

[0020] Figure 3 It is an exploded schematic diagram of the cover plate assembly of the utility model;

[0021] Figure 4 It is a schematic diagram of the cover plate assembly of the utility model;

[0022] Figure 5 This is a schematic diagram of a battery cell in an unassembled state of the second magnetic sheet of the utility model;

[0023] Figure 6 It is a schematic diagram of the battery cell of the utility model;

[0024] Description of reference numerals:

[0025] Cover plate assembly 1, cover plate 1-1, slot 1-2, spacer 1-3, pole terminal 1-4, groove 1-5, pole 1-6, snap-on component 1-7, first magnetic sheet 1-8, second magnetic sheet 1-9, pole core body 2, pole ear 2-1. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementation. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0028] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0029] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] In the prior art, the connection between the battery cell pole ear and the pole mostly adopts the traditional welding method, and a connecting plate is required to connect the pole ear at one end and the pole at the other end. Some individual schemes involve magnetic connection, but too many strong magnetic plates are set and connecting plates are still retained. The connection structure of the above scheme is relatively complicated and the connection is not convenient enough.

[0031] refer to Figures 1 to 3 The utility model provides a cover plate assembly 1, which includes a pole 1-6 terminal 1-4, a first magnetic sheet 1-8 and a second magnetic sheet 1-9. The first magnetic sheet 1-8 is embedded in one end of the pole 1-6 terminal 1-4. The first magnetic sheet 1-8 and the second magnetic sheet 1-9 are attracted to each other and can be used to clamp the pole ear 2-1 to connect the pole ear 2-1 and the pole 1-6 terminal 1-4.

[0032] Specifically, the lithium battery cover assembly 1 is a component of the battery, and its main function is to seal the positive and negative electrodes and electrolyte of the battery, prevent the electrolyte from leaking, and avoid safety accidents. At the same time, the cover assembly 1 also has the functions of stabilizing the internal pressure of the battery, balancing the electrochemical reaction, and preventing interference from external substances. The manufacturing material of the lithium battery cover assembly 1 is usually aluminum or stainless steel, and composite materials or plastics can also be used. The selection of materials depends on the packaging form and use environment of the battery. At present, most manufacturers use compression molding and precision cutting processes to ensure the sealing and precision of the cover assembly 1. Because the lithium battery cover assembly 1 has important sealing and safety performance, it has been widely used in modern life. It is mainly used in electronic products such as electric vehicles, smart phones, laptops, digital cameras, etc. In particular, in the field of electric vehicles, due to the importance of the lithium battery cover assembly 1, major automobile manufacturers and battery manufacturers have continuously optimized and improved its manufacturing process and materials. In short, the lithium battery cover assembly 1 is an important component of the lithium battery, with important sealing and safety performance, and its selection and manufacturing process have an important impact on the performance and service life of the battery.

[0033] In addition to the above functions, the battery cover assembly 1 provided by the utility model also has a function of magnetically connecting the pole ear 2-1 and the pole 1-6 terminal 1-4 with an extremely simplified design, by embedding the first magnetic sheet 1-8 at the end of the pole 1-6 terminal 1-4 close to the pole core body 2, and then placing the pole ear 2-1 of the pole core body 2 on the first magnetic sheet 1-8, and placing the second magnetic sheet 1-9 on the pole ear 2-1, the first magnetic sheet 1-8 and the second magnetic sheet 1-9 are mutually attracted to fix the pole ear 2-1, and connecting the pole ear 2-1 and the pole 1-6 terminal 1-4. This magnetic connection structure only uses two magnetic sheets, eliminating the traditional complicated welding process, and realizing a welding-free, simple and fast connection between the pole ear 2-1 and the pole 1-6 terminal 1-4.

[0034] In one embodiment, the pole terminal has two ends, one end of which is exposed to the outside and electrically connected to the outside of the battery cell, and the other end is provided with a groove 1-5 for embedding the first magnetic sheet 1-8.

[0035] Specifically, the pole 1-6 terminal 1-4 is an important component of the battery, and its main function is to connect the internal connection of the battery to an external device or a charger to transmit current and energy. The pole 1-6 terminal 1-4 is divided into a positive pole 1-6 terminal 1-4 and a negative pole 1-6 terminal 1-4. Usually, the positive pole is made of aluminum material and the negative pole is made of copper material. The structure of the pole 1-6 includes a column, a column bottom, a column head, etc., and its design and manufacturing need to consider factors such as current requirements and environmental adaptability. In addition, the manufacturing process of the pole 1-6 terminal 1-4 includes steps such as material preparation, stamping, welding connection and charge and discharge testing. The above-mentioned pole 1-6 terminal 1-4 provided by the utility model is also particularly provided with a groove 1-5 at the internal connection end, and the groove 1-5 is used to embed the first magnetic sheet 1-8 and fix it to prevent the battery cell from loosening and falling off during use.

[0036] In one embodiment, the area of ​​the first magnetic piece 1-8 is smaller than the area of ​​the second magnetic piece 1-9.

[0037] Specifically, the first magnetic sheet 1-8 is embedded in one side of the pole 1-6 terminal 1-4, which is equivalent to making the pole 1-6 magnetic. The area of ​​the second magnetic sheet 1-9 is larger than that of the first magnetic sheet 1-8 because the second magnetic sheet 1-9 needs to clamp the pole ear 2-1 while ensuring that the mutual magnetic attraction force is sufficient, so that the pole ear 2-1 can be effectively supported by the attraction of the first magnetic sheet 1-8 and the second magnetic sheet 1-9, so as to achieve the purpose of quickly connecting the pole ear 2-1 and the pole 1-6 terminal 1-4.

[0038] In one embodiment, the cover plate assembly 1 also includes a pole 1-6, the center of the pole 1-6 is a through hole, the pole 1-6 terminal 1-4 is embedded in the through hole of the pole 1-6, and the end faces of the pole 1-6 terminal 1-4 are respectively flush with the adjacent end faces of the pole 1-6.

[0039] Specifically, pole 1-6 is an important component of the battery, and its main function is to connect the internal connection of the battery with an external device or charger to transmit current and energy. Pole 1-6 is divided into positive pole 1-6 and negative pole 1-6. Usually, the positive pole is made of aluminum and the negative pole is made of copper. The structure of pole 1-6 includes a column, a column bottom, a column head, etc. Its design and manufacture need to consider factors such as current requirements and environmental adaptability. The center of the pole 1-6 of the utility model is a hollow structure, in which the pole 1-6 terminal 1-4 is provided, and the two are interference fit. The pole 1-6 is hollow and then riveted to the pole 1-6 terminal 1-4 structure. The main consideration is that one end of the pole 1-6 needs to be embedded in the first magnetic sheet 1-8, and the groove 1-5 of the pole 1-6 needs to be machined. During the machining process, the fixture will affect the local roundness and overall verticality of the pole 1-6, which will cause the pole 1-6 to be unable to be installed into the hole of the cover 1-1. With this structure, the pole 1-6 itself does not need to be machined, only the pole 1-6 terminal 1-4 needs to be machined. The pole 1-6 terminal 1-4 is riveted to the through hole of the pole 1-6. The local roundness and overall verticality of the pole 1-6 itself are guaranteed, which is conducive to assembly with the cover 1-1.

[0040] In one embodiment, the cover plate assembly 1 further includes a cover plate 1 - 1 , and a hole is provided at the center of the cover plate 1 - 1 , and the hole is used to connect with the pole 1 - 6 .

[0041] Specifically, the cover plate 1-1 is a component of the battery, and its main function is to seal the positive and negative electrodes and electrolyte of the battery, prevent the electrolyte from leaking, and avoid safety accidents. At the same time, the cover plate 1-1 also has the functions of stabilizing the internal pressure of the battery, balancing the electrochemical reaction, and preventing interference from external substances. The manufacturing material of the battery cover plate 1-1 is usually aluminum or stainless steel, and composite materials or plastics can also be used. The selection of materials depends on the packaging form and use environment of the battery. At present, most manufacturers use compression molding and precision cutting processes to ensure the sealing and precision of the cover plate 1-1. The pole 1-6 is clamped in the center hole of the above-mentioned cover plate 1-1 to connect the internal and external devices of the battery cell.

[0042] In one embodiment, the cover plate assembly 1 further includes a clamping member 1-7, which is used to be sleeved on the cylindrical surface of the pole 1-6 excluding the end surface to achieve interference fit with the center hole of the cover plate 1-1.

[0043] Specifically, the above-mentioned clamping part 1-7 is sleeved on the column of the pole 1-6. The clamping part 1-7 is made of plastic material. The plastic part has sufficient toughness to enable the pole 1-6 to be effectively clamped in the center hole of the cover plate 1-1, and the plastic part can isolate the pole 1-6 and the cover plate 1-1.

[0044] In one embodiment, the cover plate assembly 1 further includes a spacer 1-3, which is disposed on the side of the cover plate 1-1 close to the battery cell body. The center of the spacer 1-3 is a through hole, and the through hole corresponds to the center position and size of the center through hole of the cover plate 1-1.

[0045] Specifically, common spacers 1-3 mainly include plastic spacers 1-3 (PP, PE, etc.), ceramic spacers 1-3 and porous diaphragms, etc. The spacers 1-3 are located between the positive electrode and the negative electrode, and mainly play the role of isolating the electrodes to prevent accidents caused by short circuits between the positive and negative electrodes. At the same time, the spacers 1-3 can also fix the electrolyte, maintain the spacing and position between the positive and negative electrodes, and avoid losing capacitance and electrical quality. The material and processing technology of the spacers 1-3 have a great influence on the performance, life and safety of the battery. The utility model provides a spacer 1-3 mainly used to isolate the cover plate 1-1 and the pole core body 2.

[0046] In one embodiment, a slot 1-2 is provided on one side of the spacer 1-3. The slot 1-2 is located at the edge of the through hole of the spacer 1-3 close to the side of the battery body, and the second magnetic sheet 1-9 is clamped in the slot 1-2.

[0047] Specifically, a card slot 1-2 is set on one side of the card slot 1-2, and the above-mentioned card slot 1-2 is set on three sides of the center hole of the spacer 1-3, and the three sides include a long side and two short sides of the center hole, and the long side without the card slot 1-2 is used to connect the pole ear 2-1, and the above-mentioned three-sided card slot 1-2 is used to clamp the above-mentioned second magnetic sheet 1-9. The setting of the card slot 1-2 can fix the second magnetic sheet 1-9 without shifting or shaking during the transportation and use of the battery cell, and firmly press the pole ear 2-1.

[0048] According to another embodiment of the present application, a battery cell is provided, including the above-mentioned cover plate assembly 1 and a pole core body 2, wherein the pole ear 2-1 of the pole core body 2 is placed on the first magnetic sheet 1-8 of the cover plate assembly 1, and the second magnetic sheet 1-9 of the cover plate assembly 1 is clamped in the clamping slot 1-2 and is attracted and clamped with the first magnetic sheet 1-8 to clamp the pole ear 2-1 of the pole core body 2 to connect the pole ear 2-1 and the pole 1-6.

[0049] Specifically, a battery cell is provided, which uses the above-mentioned cover plate assembly 1. During the assembly of the battery cell, a simple and quick connection between the pole lug 2-1 and the pole 1-6 can be achieved, which greatly saves assembly time, improves the electrical connection quality between the pole lug 2-1 and the pole 1-6, and reduces the occurrence of accidents caused by abnormal connection of the battery cell.

[0050] According to another embodiment of the present application, a battery pack is provided, comprising the above-mentioned multiple battery cells and a battery pack shell, wherein the multiple battery cells are accommodated in the battery pack shell.

[0051] Specifically, a battery pack is provided which uses a plurality of the above-mentioned battery cells. The plurality of the above-mentioned battery cells can be freely connected in series or in parallel in the battery pack. According to the capacity and voltage requirements of the battery pack, since the pole lug 2-1 and the pole post 1-6 use the above-mentioned simple and fast magnetic connection method, the overall assembly efficiency of the battery pack is greatly improved, and the subsequent inspection and maintenance are also more convenient. The pole lug 2-1 and the pole post 1-6 can be disassembled and reconnected without loss, the reuse rate of the cover plate 1-1 is greatly improved, and there is no need to use welding technology, and the entire life cycle of the battery pack is more environmentally friendly.

[0052] According to another embodiment of the present application, there is provided an electrical device, comprising the above-mentioned battery pack and the electrical device, wherein the battery pack is used to supply power to the electrical device.

[0053] Specifically, the electrical device may be a household lighting device, the electrical device being a lamp tube, the battery pack supplies power to the lamp tube, and the lamp tube emits light for lighting.

[0054] The utility model provides a cover plate assembly 1, which utilizes the magnetic attraction principle to connect the pole ear 2-1 of the battery cell with the pole 1-6, solves the problem of complex connection structure between the existing pole ear 2-1 and the pole 1-6, and realizes welding-free, simple and fast connection between the pole ear 2-1 and the pole 1-6 terminal 1-4.

[0055] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0056] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A cover plate assembly, characterized in that: The cover plate assembly includes a pole terminal, a first magnetic sheet and a second magnetic sheet, wherein the first magnetic sheet is embedded in one end of the pole terminal, and the first magnetic sheet and the second magnetic sheet are attracted to each other and can be used to clamp the pole ear to connect the pole ear and the pole terminal.

2. The cover plate assembly according to claim 1, characterized in that: The pole terminal has two ends, one end of which is exposed to the outside and electrically connected to the outside of the battery cell, and the other end is provided with a groove for embedding the first magnetic sheet.

3. The cover plate assembly according to claim 1, characterized in that: The area of ​​the first magnetic piece is smaller than the area of ​​the second magnetic piece.

4. The cover plate assembly according to claim 1, characterized in that: The cover plate assembly also includes a pole, the center of the pole is a through hole, the pole terminal is embedded in the through hole of the pole, and the end faces of the pole terminal are respectively flush with the adjacent end faces of the pole.

5. The cover plate assembly according to claim 1, characterized in that: The cover plate assembly further comprises a cover plate, a hole is arranged at the center of the cover plate, and the hole is used for connecting with the pole.

6. The cover plate assembly according to claim 1, characterized in that: The cover plate assembly also includes a clamping piece, which is used to be sleeved on the cylindrical surface of the pole excluding the end surface and to have an interference fit with the central hole of the cover plate.

7. The cover plate assembly according to claim 1, characterized in that: The cover plate assembly also includes a spacer, which is arranged against the cover plate. The center of the spacer is a through hole, and the through hole corresponds to the center position and size of the center through hole of the cover plate.

8. The cover plate assembly according to claim 7, characterized in that: A slot is provided on one side of the spacer ring, and the second magnetic sheet is locked in the slot.

9. An electric core, comprising the cover plate assembly and a pole core body as described in any one of claims 1 to 8, wherein the pole ear of the pole core body is placed on the first magnetic sheet of the cover plate assembly, and the second magnetic sheet of the cover plate assembly is clamped in a slot and is attracted and clamped with the first magnetic sheet to clamp the pole ear of the pole core body to connect the pole ear and the pole column. 10 . A battery pack, comprising the plurality of battery cells according to claim 9 and a battery pack casing, wherein the plurality of battery cells are accommodated in the battery pack casing.

11. An electrical device, comprising the battery pack according to claim 10 and an electrical device, wherein the battery pack is used to supply power to the electrical device.

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