Battery structure, single battery, battery pack and electric equipment

Abstract

The invention discloses a battery structure, a single battery, a battery pack and electric equipment, the battery structure comprises a pole core, a pole column and a protection piece, the pole core is provided with a pole lug, the pole column is arranged on one side of the pole lug, the protection piece is arranged on the other side of the pole lug, and the protection piece, the pole lug and the pole column are connected in sequence. By arranging the protection piece on one side of the tab, the tab and the pole can be pressed by the protection piece, so that the cost can be saved, the assembly process of the battery structure can be simplified, the assembly efficiency of the battery structure can be improved, the space utilization rate of the battery structure can be improved, and the energy density and the safety of a battery pack can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery structure, a single cell, a battery pack and an electrical device. Background Art

[0002] At present, the development focus of new energy vehicles is power battery technology. Welding is the key in battery connection technology. The design of the welding structure and the process stability directly affect the reliability of the battery connection. Among them, the welding process of the tabs and cover plates of square lithium-ion batteries is the most important. The reliability of the connection between the tabs and cover plates will affect the battery's current capacity.

[0003] In the related art, the welding between the tab and the cover plate uses a soft connection transition, which requires two layers of upper and lower protective sheets, which will increase the weight and space occupied by the battery pack, and the protective sheet is folded in half to form a blunt edge to prevent the protective sheet from scratching the tab, which will increase the manufacturing process and equipment investment of the protective sheet. One end of the soft connection transition sheet is connected to the pole core using ultrasonic welding, and the other end is connected to the connecting sheet of the cover plate using laser welding. This will result in a large number of process welding times, resulting in a high risk of cold welding, large ohmic impedance, and a large amount of metal debris. It will also cause the internal resistance of the battery pack to be high and the charge and discharge heat generation dimension to be high. Metal debris is not conducive to the safety of the battery pack, and the soft connection sheet will occupy the internal space of the battery pack, resulting in low energy of the battery pack. The soft connection sheet needs to be bent, which reduces production efficiency and increases equipment investment costs. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a battery structure that allows the protective member to be press-fitted onto the tabs and posts, thereby improving the assembly efficiency and product quality of the battery pack.

[0005] The present invention further provides a single cell.

[0006] The present invention further provides a battery pack.

[0007] The present invention further provides an electrical device.

[0008] According to the battery structure of the present invention, it includes: a pole core, a pole column and a protective member, the pole core is provided with a pole lug, the pole column is provided on one side of the pole lug, the protective member is provided on the other side of the pole lug, and the protective member, the pole lug and the pole column are connected in sequence.

[0009] According to the battery structure of the present invention, by arranging the protective part on one side of the pole ear, the protective part can be pressed into the pole ear and the pole column. This arrangement can save costs, simplify the assembly process of the battery structure and improve the assembly efficiency of the battery structure, thereby improving the space utilization of the battery structure and improving the energy density and safety of the battery pack.

[0010] In some examples of the present invention, the protective member, the electrode tab, and the electrode post are connected by resistance welding.

[0011] In some examples of the present invention, the pole core includes: a first pole core and a second pole core, the first pole core and the second pole core are spaced apart, and the pole column and the protective member are disposed between the first pole core and the second pole core.

[0012] In some examples of the present invention, a first pole lug is provided on a side of the first pole core facing the second pole core, a second pole lug is provided on a side of the second pole core facing the first pole core, the first pole lug and the second pole lug are overlapped, the pole column is provided on one side of the first pole lug or the second pole lug, and the protective member is provided on the other side of the first pole lug or the second pole lug.

[0013] In some examples of the present invention, the pole includes: a first pole and a second pole, and the first pole and the second pole are spaced apart along the length or width direction of the pole core.

[0014] In some examples of the present invention, the protective member is provided on one side of the first pole and / or one side of the second pole.

[0015] In some examples of the present invention, the battery structure further includes: a light cover plate, wherein the light cover plate is arranged on one side of the pole.

[0016] In some examples of the present invention, the battery structure further includes: an insulating member and a first sealing member, wherein the insulating member and the first sealing member are disposed between the optical cover and the pole.

[0017] In some examples of the present invention, the battery structure further includes: a second sealing member, wherein the second sealing member is disposed between the optical cover and the tab.

[0018] In some examples of the present invention, the first electrode tab is made of pure foil or composite foil, and the second electrode tab is made of pure foil or composite foil.

[0019] In some examples of the present invention, the battery structure further includes: a protrusion structure, wherein the protrusion structure is provided on a side of the protective member facing the pole lug; or the protrusion is provided on a side of the pole facing the pole lug.

[0020] In some examples of the present invention, the protrusion structure includes: a plurality of protrusions, and the plurality of protrusions are arranged and distributed.

[0021] In some examples of the present invention, the height of the multiple protrusions is h, the cross-section of the protrusion is circular, the maximum circular diameter is d, and h and d satisfy the relationship: 0.05mm≤h≤2mm, and / or 0.05mm≤d≤5mm.

[0022] In some examples of the present invention, the width of the multiple protrusions arranged along the first direction is L1, and the width of the multiple protrusions arranged along the second direction is L2. The first direction and the second direction are arranged perpendicularly, and L1 and L2 satisfy the relationship: 0.05mm≤L1≤20mm, and / or 0.05mm≤L2≤100mm.

[0023] In some examples of the present invention, the distance between two adjacent protrusions is L3, and L3 satisfies the relationship: 0≤L3≤20mm.

[0024] In some examples of the present invention, the pattern arranged between the plurality of protrusions is one of a rectangle, a diamond, an ellipse, and a circle.

[0025] According to the single cell battery of the present invention, it includes: a shell and the battery structure described above, the first pole core and the second pole core are both folded, after the first pole core and the second pole core are folded, the large surface of the first pole core and the large surface of the second pole core are arranged opposite to each other, and the battery structure is arranged in the shell.

[0026] In some examples of the present invention, after the first pole core and the second pole core are folded, the pole post and the protective member are disposed at one end of the first pole core and the second pole core.

[0027] The battery pack according to the present invention includes the above-mentioned single battery.

[0028] The electrical equipment according to the present invention includes the battery pack described above.

[0029] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0031] Figure 1 is a schematic structural diagram of a battery structure according to an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of a battery structure according to an embodiment of the present invention;

[0033] Figure 3 is a partial cross-sectional view from a first angle of a battery structure according to an embodiment of the present invention;

[0034] Figure 4 is a partial cross-sectional view from a second angle of the battery structure according to an embodiment of the present invention;

[0035] Figure 5 It is an enlarged view of A;

[0036] Figure 6 It is an enlarged view of B;

[0037] Figure 7 is an exploded view of a battery structure according to an embodiment of the present invention;

[0038] Figure 8 is a structural diagram of the raised structure;

[0039] Figure 9 It is a structural schematic diagram of the raised portion.

[0040] Reference numerals:

[0041] 100. Battery structure;

[0042] 10. Pole core; 11. Pole tab; 12. First pole core; 13. Second pole core; 14. First pole tab; 15. Second pole tab; 20. Pole; 21. First pole; 22. Second pole; 30. Protective member; 40. Light cover; 50. Insulating member; 60. First sealing member; 70. Second sealing member; 80. Raised structure; 81. Raised portion. DETAILED DESCRIPTION

[0043] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0044] Reference below Figures 1-9 A battery structure 100 according to an embodiment of the present invention is described. The battery structure 100 is applied to an electrical device, such as a battery pack.

[0045] like Figure 1-Figure 7 As shown, the battery structure 100 according to the present invention includes: a pole core 10, a pole post 20 and a protective member 30, the pole core 10 is provided with a pole tab 11, the pole post 20 is provided on one side of the pole tab 11, and the protective member 30 is provided on the other side of the pole tab 11, and the protective member 30, the pole tab 11 and the pole post 20 are connected in sequence.

[0046] It can be understood that the pole core 10, the pole post 20 and the protective member 30 constitute the main body of the battery structure 100. The pole core 10 and the pole post 20 can connect the positive and negative poles in the battery structure 100, so that the current in the battery structure 100 can be connected, and then the current and energy can be transmitted to the external device. The two pole cores 10 are arranged at intervals on the left and right. The pole core 10 on the left is provided with a pole ear 11 facing the pole core 10 on the right, and the pole core 10 on the right is provided with a pole ear 11 facing the pole core 10 on the left, so that the pole ear 11 can lead the current out to generate a loop. The two pole ears 11 are overlapped up and down, so that the space occupied by the battery structure 100 can be saved, and the current of the pole cores 10 on the left and right sides can be interconnected, thereby omitting the ultrasonic welding process, and there is no need to set a cover plate lead-out plate, thereby saving materials and reducing the overall quality of the battery structure 100, thereby improving the battery structure 100. Energy density and space utilization, the pole column 20 is divided into a positive pole column 20 and a negative pole column 20, and the positive pole column 20 and the negative pole column 20 are both located on the lower side of the pole ear 11, so that the positive pole column 20 can be connected to the pole ear 11, and the negative pole column 20 can be connected to the pole ear 11, and the protective member 30 is located on the upper side of the positive pole column 20, and the protective member 30 is arranged on the upper side of the pole ear 11, so that the protective member 30, the pole ear 11 and the positive pole column 20 can be connected in sequence. This arrangement can cancel the design of the upper and lower layers of protection of the pole ear 11, thereby saving materials and thus saving costs. The protective member 30 can prevent the electrodes from sticking during resistance welding, thereby improving the safety of assembly of the battery structure 100, and thereby improving the performance of the battery structure 100. For example, the pole ear 11 is pure foil material, and the protective member 30 is made of a composite of multiple layers of aluminum foil and aluminum plate, which is convenient for preventing the electrodes from sticking during resistance welding.

[0047] Therefore, by setting the protective part 30 on one side of the pole lug 11, the protective part 30 can be pressed into the pole lug 11 and the pole column 20. This setting can save costs, simplify the assembly process of the battery structure 100, and improve the assembly efficiency of the battery structure 100, thereby improving the space utilization of the battery structure 100 and improving the energy density and safety of the battery pack.

[0048] The protective member 30, the tab 11, and the post 20 are welded together, and resistance welding is used between the tab 11 and the post 20. This prevents the risk of foreign matter from laser welding spatter entering the pole core 10, thereby improving the safety of the battery structure 100. The positive post 20, the tab 11, and the protective member 30 are welded together in one step, and the negative post 20 and the tab 11 are welded together in one step. This arrangement reduces the number of welds, thereby simplifying the assembly process of the battery structure 100 and saving costs. For example, the negative post 20 is made of pure copper, 1-series pure aluminum, or a copper-aluminum composite.

[0049] In addition, if Figure 1 、 Figure 3 and Figure 4 As shown, the pole core 10 includes: a first pole core 12 and a second pole core 13, which are spaced apart from each other, and a pole post 20 and a protective member 30 are disposed between the first pole core 12 and the second pole core 13. It can be understood that the first pole core 12 and the second pole core 13 constitute the main structure of the pole core 10. The first pole core 12 and the second pole core 13 are spaced apart from each other, so that space is formed between the first pole core 12 and the second pole core 13 to accommodate the pole tab 11, the protective member 30, and the pole post 20, thereby facilitating current connection between the first pole core 12 and the second pole core 13.

[0050] Among them, Figure 5 and Figure 6 As shown, a first electrode tab 14 is provided on the side of the first electrode core 12 facing the second electrode core 13, and a second electrode tab 15 is provided on the side of the second electrode core 13 facing the first electrode core 12. The first electrode tab 14 and the second electrode tab 15 are overlapped and matched. The pole 20 is provided on one side of the first electrode tab 14 or the second electrode tab 15, and the protective member 30 is provided on the other side of the first electrode tab 14 or the second electrode tab 15. In other words, the first electrode tab 14 is located in the first electrode core 12, and the second electrode tab 15 is located in the second electrode core 13. The first electrode tab 14 extends toward the second electrode core 13, and the second electrode tab 15 extends toward the first electrode core 12. As a result, the first electrode tab 14 and the second electrode tab 15 are located between the first electrode core 12 and the second electrode core 13. The first electrode tab 14 and the second electrode tab 15 overlap and match, thereby saving space occupied by the battery structure 100 and allowing current to flow between the first electrode core 12 and the second electrode core 13, thereby omitting the ultrasonic welding process.

[0051] In addition, if Figure 5 and Figure 6 As shown, the pole 20 includes a first pole 21 and a second pole 22 , and the first pole 21 and the second pole 22 are spaced apart along the length or width direction of the pole core 10 . It can be understood that the first electrode 21 is the positive electrode 20, and the second electrode 22 is the negative electrode 20. The first electrode 21 and the second electrode 22 are spaced apart along the length or width direction of the electrode core 10, so that the positive electrode 20 and the negative electrode 20 can be connected to the current in the battery structure 100, and then the current and energy can be transmitted to the external device. The positive electrode 20 and the negative electrode 20 are both located on the lower side of the first electrode 14 and the second electrode 15, so that the positive electrode 20 can be connected to the second electrode 15, and the negative electrode 20 can be connected to the second electrode 15. The protective member 30 is located on the upper side of the positive electrode 20, and the protective member 30 is arranged on the upper side of the first electrode 14, so that the protective member 30, the first electrode 14, the second electrode 15 and the positive electrode 20 can be connected in sequence. This arrangement can cancel the design of the upper and lower layer protection of the electrode 11, thereby saving materials and thus saving costs.

[0052] In particular, if Figure 5 As shown, the protective member 30 is arranged on one side of the first pole 21, or the protective member 30 is arranged on one side of the first pole 21 and the second pole 22. That is, the protective member 30 is located on the upper side of the positive pole 20, and the protective member 30 is arranged on the upper side of the first tab 14, so that the protective member 30, the tab 11 and the positive pole 20 can be connected in sequence. This arrangement can eliminate the design of upper and lower layer protection of the tab 11, thereby saving materials and further saving costs. For example, the tab 11 is a pure foil material, the protective member 30 is arranged on one side of the first pole 21, the tab 11 is a composite foil material, and the protective member 30 is arranged on one side of the first pole 21 and the second pole 22. This arrangement allows the protective member 30 to protect the pole 20, wherein the composite foil material is a foil material in which a conductive layer, an insulating layer and a conductive layer are connected in sequence.

[0053] In addition, if Figure 5-Figure 7 As shown, the battery structure 100 further includes: a light cover 40, which is disposed at the edge of the pole 20. It is understood that the light cover 40 is located on both sides of the pole 20 and under the first pole tab 14 and the second pole tab 15, so that the light cover 40 can block light from the first pole tab 14 and the second pole tab 15, thereby ensuring the performance of the first pole tab 14 and the second pole tab 15.

[0054] In addition, if Figure 5-Figure 7 As shown, the battery structure 100 further includes an insulating member 50 and a first sealing member 60, which are disposed between the optical cover 40 and the terminal 20. Specifically, the insulating member 50 is positioned between the optical cover 40 and the terminal 20 to prevent a circuit from forming between the optical cover 40 and the terminal 20, thereby ensuring the performance of the terminal 20. It also allows the current in the battery structure 100 to be connected and transfer the current and energy to external devices. The first sealing member 60 is disposed on the side of the insulating member 50, allowing the first sealing member 60 to be positioned between the optical cover 40 and the terminal 20, thereby filling the gap between the optical cover 40 and the terminal 20 and improving the stability of the battery structure 100. For example, the first sealing member 60 can be a rubber ring to facilitate installation and removal.

[0055] In addition, if Figure 5-Figure 7 As shown, the battery structure 100 further includes a second sealant 70 disposed between the optical cover 40 and the tab 11. It will be appreciated that the second sealant 70 is located between the optical cover 40 and the tab 11, thereby filling the gap between the optical cover 40 and the tab 11 and improving the stability of the battery structure 100. For example, the second sealant 70 may be a bottom spacer of the optical cover 40, thereby improving the stability of the battery structure 100.

[0056] In addition, Figure 8 As shown, the battery structure 100 further includes a protruding structure 80, which is disposed on the side of the protective member 30 facing the tab 11, or on the side of the terminal post 20 facing the tab 11. Specifically, when the tab 11 is a composite foil, the protruding structure 80 is disposed on the upper side of the protective member 30, with the protruding direction facing downward, or the protruding structure 80 is located on the upper side of the terminal post 20, with the protruding direction facing upward. This allows the protruding structure 80 to pass through the tab 11, thereby ensuring the performance of the battery structure 100. For example, the composite foil comprises a conductive layer, an insulating layer, and a conductive layer connected in sequence.

[0057] In particular, Figure 9 As shown, the protrusion structure 80 includes: multiple protrusions 81, and the multiple protrusions 81 are arranged and distributed. Such an arrangement can increase the distribution area of the protrusions 81 and also increase the protrusion area of the protrusion structure 80, thereby facilitating the protrusion structure 80 to pass through the tab 11, thereby ensuring the performance of the battery structure 100.

[0058] Alternatively, as Figure 9 As shown, the height of the plurality of protrusions 81 is h, the cross-section of the protrusion 81 is circular, the maximum circular diameter is d, and h and d satisfy the relationship: 0.05mm≤h≤2mm, and / or 0.05mm≤d≤5mm. It can be understood that the height and diameter of the protrusion 81 need to be within a reasonable range. If the height of the protrusion 81 is less than 0.05mm, the protrusion 81 will not be able to completely pass through the tab 11, thereby affecting the performance of the battery structure 100. If the height of the protrusion 81 is greater than 2mm, the protrusion 81 will be too high, which will cause the protrusion 81 to pass through the tab 11 to the pole 20, and will also damage the performance of the pole 20, thereby affecting the performance of the battery structure 100. The height of the protrusion 81 is within a reasonable range, so that the protrusion structure 80 can pass through the tab 11, thereby ensuring the battery Regarding the performance of the structure 100, if the protrusion diameter is less than 0.05 mm, the strength of the protrusion 81 will be insufficient, resulting in the protrusion 81 not being able to fully pass through the tab 11, thereby affecting the performance of the battery structure 100. If the protrusion diameter is greater than 5 mm, the protrusions 81 will be arranged too few in the limited space of the protrusion structure 80, and the protrusion 81 will not be able to pass through the tab 11 over a large area, thereby affecting the performance of the battery structure 100. If the protrusion diameter is within a reasonable range, the protrusion structure 80 can pass through the tab 11, thereby ensuring the performance of the battery structure 100. For example, the height of the protrusion 81 is 0.5 mm, 1 mm, or 2 mm, and the protrusion diameter is 1 mm, 3 mm, or 5 mm, which can ensure that the protrusion structure 80 passes through the tab 11. Consider selecting an appropriate parameter during the specific design.

[0059] In addition, if Figure 8 As shown, the width of the multiple protrusions 81 arranged along the first direction is L1, and the width of the multiple protrusions 81 arranged along the second direction is L2. The first direction and the second direction are perpendicularly arranged, and L1 and L2 satisfy the relationship: 0.05mm≤L1≤20mm, and / or 0.05mm≤L2≤100mm. In other words, the arrangement width of the multiple protrusions 81 in the first direction and the second direction must be within a reasonable range. If the width arranged in the first direction is less than 0.05mm, this will cause the area of the protrusion structure 80 to be too small, which is not conducive to the protrusion structure 80 passing through the tab 11. If the width arranged in the first direction is greater than 20mm, this will cause the protrusion structure 80 to be too large, which will increase the use of materials and further increase the weight of the battery structure 100. If the width arranged in the first direction is within a reasonable range, this will allow the protrusion structure 80 to pass through the tab 11, thereby ensuring the performance of the battery structure 100 and also To achieve a lightweight design of the battery structure 100, if the width arranged in the second direction is less than 0.05 mm, the area of the protruding structure 80 will be too small, which is not conducive to the protruding structure 80 passing through the tab 11. If the width arranged in the second direction is greater than 100 mm, the protruding structure 80 will be too large, which will increase the use of materials and thus increase the weight of the battery structure 100. If the width arranged in the second direction is within a reasonable range, the protruding structure 80 will pass through the tab 11, thereby ensuring the performance of the battery structure 100 and achieving a lightweight design of the battery structure 100. For example, if the width arranged in the first direction is 5 mm, 10 mm or 15 mm, and the width arranged in the second direction is 20 mm, 50 mm or 80 mm, this can ensure that the protruding structure 80 passes through the tab 11 and achieve a lightweight design of the battery structure 100. Consider selecting an appropriate parameter during the specific design.

[0060] In addition, if Figure 8As shown, the spacing between two adjacent protrusions 81 is L3, and L3 satisfies the relationship: 0≤L3≤20mm. It can be understood that the spacing between two adjacent protrusions 81 must be within a reasonable range. If the spacing between two adjacent protrusions 81 is greater than 20mm, this will cause the protrusion structure 80 to be too large, which will increase the use of materials and thus increase the weight of the battery structure 100. If the spacing between two adjacent protrusions 81 is within a reasonable range, the protrusion structure 80 will pass through the tab 11, thereby ensuring the performance of the battery structure 100 and achieving a lightweight design of the battery structure 100. For example, the spacing between two adjacent protrusions 81 is 5mm, 10mm, or 15mm, which can ensure that the protrusion structure 80 passes through the tab 11 and can also save material for the protrusion structure 80. Consider selecting a suitable parameter during the specific design.

[0061] Alternatively, as Figure 8 and Figure 9 As shown, the pattern arranged between the multiple protrusions 81 is one of rectangle, diamond, ellipse, and circle. In this way, a suitable shape can be selected according to actual conditions, so as to facilitate the protrusion structure 80 to pass through the tab 11, thereby ensuring the performance of the battery structure 100.

[0062] Specifically, the welding and assembly process of the battery structure 100 is divided into four types. The first type: the tab 11 is a pure foil material. First, the first pole core 12 and the second pole core 13 are loaded and positioned, and then the first pole tab 14 and the second pole tab 15 are overlapped and matched, and the light cover 40 is loaded and positioned. Then, the protective member 30 is set above the first pole column 21 and pressed on the upper side of the first pole tab 14 and the second pole tab 15, and the light cover 40 and the pole core 10 are positioned. Then, a clamp is used to press the protective member 30, the tab 11 and the positive pole column 20, and the tab 11 and the negative pole column 20. Finally, the protective member 30, the tab 11 and the positive pole column 20 are resistance welded, and the tab 11 and the negative pole column 20 are resistance welded. The parameters of the resistance welding are set according to the actual current, pressure and time, and the battery structure 100 is assembled.

[0063] The second type: the first pole tab 14 is a pure foil material, and the second pole tab 15 is a composite foil material. First, the first pole core 12 and the second pole core 13 are loaded and positioned, and then the first pole tab 14 and the second pole tab 15 are overlapped and matched, and the light cover plate 40 is loaded and positioned, and then the protective member 30 is set above the first pole column 21 and pressed on the upper side of the first pole tab 14, the protective member 30 is set above the second pole column 22 and pressed on the upper side of the first pole tab 14, and the light cover plate 40 and the pole core 10 are positioned, and then the protective member 30, the pole tab 11 and the positive pole column 20 are pressed together with the protective member 30, the pole tab 11 and the negative pole column 20 using a clamp, and finally the protective member 30, the pole tab 11 and the positive pole column 20 are resistance welded, and the protective member 30, the pole tab 11 and the negative pole column 20 are resistance welded together. The parameters of the resistance welding are set according to the actual current, pressure and time, and the battery structure 100 is assembled.

[0064] The third type: the first pole tab 14 is a composite foil material, and the second pole tab 15 is a pure foil material. First, the first pole core 12 and the second pole core 13 are loaded and positioned, and then the first pole tab 14 and the second pole tab 15 are overlapped and matched, and the light cover plate 40 is loaded and positioned. Then, a clamp is used to press the protective part 30, the pole tab 11 and the positive electrode column 20, and the pole tab 11 and the negative electrode column 20. Finally, the protective part 30, the pole tab 11 and the positive electrode column 20 are resistance welded, and the pole tab 11 and the negative electrode column 20 are resistance welded. The parameters of the resistance welding are set according to the actual current, pressure and time, and the battery structure 100 is assembled.

[0065] The fourth type: the first pole ear 14 is a composite foil material, and the second pole ear 15 is a composite foil material. First, the first pole core 12 and the second pole core 13 are loaded and positioned, and then the first pole ear 14 and the second pole ear 15 are overlapped and matched, and the light cover plate 40 is loaded and positioned, and then the protective member 30 is arranged above the first pole column 21 and pressed on the upper side of the first pole ear 14, the protective member 30 is arranged above the second pole column 22 and pressed on the upper side of the first pole ear 14, and the light cover plate 40 and the pole core 10 are positioned, and then the protective member 30, the pole ear 11 and the positive pole column 20 are pressed together with the protective member 30, the pole ear 11 and the negative pole column 20 using a clamp, and finally the protective member 30, the pole ear 11 and the positive pole column 20 are resistance welded, and the protective member 30, the pole ear 11 and the negative pole column 20 are resistance welded together. The parameters of the resistance welding are set by the actual current, pressure and time, and the battery structure 100 is assembled.

[0066] The single cell battery according to the present invention comprises: a housing and the battery structure 100 of the above embodiment, wherein the first pole core 12 and the second pole core 13 are both folded. After the first pole core 12 and the second pole core 13 are folded, the large surface of the first pole core 12 and the large surface of the second pole core 13 are arranged opposite each other, and the battery structure 100 is arranged in the housing. This arrangement allows the first pole core 12 and the second pole core 13, which have opposite positive and negative polarities, to be close to each other, and the large surface of the first pole core 12 and the large surface of the second pole core 13 to be arranged opposite each other, thereby enabling current to be transferred between the first pole core 12 and the second pole core 13. It also improves the space utilization of the single cell battery. The housing can provide installation space for the battery structure 100 and can also protect the battery structure 100, thereby extending the service life of the battery structure 100.

[0067] After the first pole core 12 and the second pole core 13 are folded, the pole post 20 and the protective member 30 are arranged at one end of the first pole core 12 and the second pole core 13. This arrangement can improve the assembly efficiency of the single battery and the space utilization of the single battery, thereby improving the energy density and safety of the single battery.

[0068] The battery pack according to the present invention includes the single battery cell of the above embodiment. By disposing the protective member 30 on one side of the tab 11, the protective member 30 can be press-fitted onto the tab 11 and the terminal post 20. This arrangement can save costs, simplify the assembly process of the battery structure 100, and improve the assembly efficiency of the battery structure 100. This can further improve the space utilization of the battery structure 100 and enhance the energy density and safety of the battery pack.

[0069] The electrical equipment according to the present invention includes the battery pack of the above embodiment. Such an arrangement can ensure the performance of the battery pack and realize a lightweight design of the battery pack, thereby improving the safety performance of the battery pack.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0071] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. In the description of the present invention, a first feature being "above", "above" and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0072] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A battery structure, characterized in that: include: A pole core (10), wherein the pole core (10) is provided with a pole ear (11); A pole (20), the pole (20) being arranged on one side of the pole lug (11); A protective member (30) is provided on the other side of the pole tab (11), and the protective member (30), the pole tab (11) and the pole (20) are connected in sequence.

2. The battery structure according to claim 1, characterized in that: The protective member (30), the pole tab (11) and the pole (20) are connected by resistance welding.

3. The battery structure according to claim 2, characterized in that: The pole core (10) comprises a first pole core (12) and a second pole core (13), wherein the first pole core (12) and the second pole core (13) are arranged at intervals, and the pole column (20) and the protective member (30) are arranged between the first pole core (12) and the second pole core (13).

4. The battery structure according to claim 3, characterized in that: A first pole lug (14) is provided on a side of the first pole core (12) facing the second pole core (13), and a second pole lug (15) is provided on a side of the second pole core (13) facing the first pole core (12). The first pole lug (14) and the second pole lug (15) are overlapped and matched. The pole (20) is provided on one side of the first pole lug (14) or the second pole lug (15), and the protective member (30) is provided on the other side of the first pole lug (14) or the second pole lug (15).

5. The battery structure according to claim 1, characterized in that: The pole (20) comprises a first pole (21) and a second pole (22), wherein the first pole (21) and the second pole (22) are arranged at intervals along the length or width direction of the pole core (10).

6. The battery structure according to claim 5, characterized in that: The protective member (30) is provided on one side of the first pole (21) and / or one side of the second pole (22).

7. The battery structure according to claim 1, characterized in that: Also includes: A light cover plate (40), the light cover plate (40) is arranged on one side of the pole (20).

8. The battery structure according to claim 7, characterized in that: Also includes: An insulating member (50) and a first sealing member (60), wherein the insulating member (50) and the first sealing member (60) are arranged between the optical cover plate (40) and the pole (20).

9. The battery structure according to claim 7, characterized in that: Also includes: A second sealing member (70) is provided between the optical cover plate (40) and the tab (11).

10. The battery structure according to claim 4, characterized in that: The first electrode tab (14) is made of pure foil or composite foil, and the second electrode tab (15) is made of pure foil or composite foil.

11. The battery structure according to any one of claims 1 to 10, characterized in that: It also includes: a protruding structure (80), the protruding structure (80) being arranged on a side of the protective member (30) facing the tab (11); or The protrusion is arranged on a side of the pole (20) facing the pole lug (11).

12. The battery structure according to claim 11, characterized in that: The protrusion structure (80) comprises: a plurality of protrusions (81), and the plurality of protrusions (81) are arranged and distributed.

13. The battery structure according to claim 12, characterized in that: The height of the plurality of protrusions (81) is h, the cross section of the protrusion (81) is circular, the maximum circular diameter is d, and h and d satisfy the relationship: 0.05mm≤h≤2mm, and / or 0.05mm≤d≤5mm.

14. The battery structure according to claim 12, characterized in that: The width of the multiple protrusions (81) arranged along the first direction is L1, and the width of the multiple protrusions (81) arranged along the second direction is L2. The first direction and the second direction are arranged perpendicularly, and L1 and L2 satisfy the relationship: 0.05mm≤L1≤20mm, and / or 0.05mm≤L2≤100mm.

15. The battery structure according to claim 12, characterized in that: The distance between two adjacent protrusions (81) is L3, and L3 satisfies the relationship: 0≤L3≤20mm.

16. The battery structure according to claim 12, characterized in that: The pattern arranged between the plurality of protrusions (81) is one of a rectangle, a diamond, an ellipse and a circle.

17. A single cell battery, characterized in that: include: case; The battery structure (100) according to any one of claims 1 to 16, wherein the first pole core (12) and the second pole core (13) are both folded, and after the first pole core (12) and the second pole core (13) are folded, the large surface of the first pole core (12) and the large surface of the second pole core (13) are arranged relative to each other, and the battery structure (100) is arranged in the shell.

18. The single cell according to claim 17, characterized in that: After the first pole core (12) and the second pole core (13) are folded, the pole column (20) and the protective member (30) are arranged at one end of the first pole core (12) and the second pole core (13).

19. A battery pack, characterized in that: include: The single cell according to any one of claims 17 and 18.

20. An electrical device, characterized in that: include: The battery pack as claimed in claim 19.

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