Cover plate assembly, battery, battery assembling device, battery pack and electric equipment

Abstract

The invention discloses a cover plate assembly, a battery, a battery assembly device, a battery pack and electric equipment, the cover plate assembly of the battery comprises: a cover plate which is an electric connection end and is provided with a groove; and the connecting piece is connected with the groove bottom of the groove and is at least partially positioned outside the groove, so that the connecting piece can be used for being connected with a tab. Therefore, the cover plate can realize input and output of voltage, and the space occupied by a traditional pole can be reduced, so that more wrapping space can be used for placing a battery cell. In addition, the cover plate is provided with the groove, so that the contact area between the groove and the outside can be increased, and the resistance can be reduced.

Description

Technical Field

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

[0002] In the prior art, the cover plate assembly is provided with a pole, and the pole is processed as a component, which increases the manufacturing cost and reduces the production efficiency. Moreover, the arrangement of the pole also occupies a large space of the cover plate assembly, thereby reducing the energy density of the battery cell. Summary of the invention

[0003] 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 cover plate assembly, which can realize a pole-free design, the cover plate can realize voltage input and output, and can reduce the space occupied by the traditional pole, so that more package space can be used for the placement of battery cells. In addition, the cover plate is provided with a groove, which can increase the contact area between the groove and the outside world, thereby reducing the resistance.

[0004] The present invention further provides a battery; The present invention further provides a battery assembly device; The present invention further provides a battery pack; The invention also provides an electrical device.

[0005] According to the first aspect of the present invention, the cover plate assembly includes: a cover plate, which is an electrical connection end and is provided with a groove; and a connecting member, which is connected to the bottom of the groove and is at least partially located outside the groove for connection with the pole ear.

[0006] Therefore, the cover plate assembly can realize a pole-free design, the cover plate can realize voltage input and output, and can reduce the space occupied by the traditional pole, so that more package space can be used for placing the battery cell. In addition, the cover plate is provided with a groove, which can increase the contact area between the groove and the outside world, thereby reducing the resistance.

[0007] According to some embodiments of the present invention, a mounting hole is provided at the bottom of the groove, and a portion of the connecting member passes through the mounting hole.

[0008] According to some embodiments of the present invention, the connecting member includes: a connecting plate, which is located outside the groove; and a mounting portion, which is passed through the mounting hole to connect with the bottom of the groove, and the mounting portion is connected to the connecting plate.

[0009] According to some embodiments of the present invention, the mounting portion includes: a column, one end of the column passing through the mounting hole forms a groove bottom connecting surface, the other end of the column is connected to the connecting plate, and the area of ​​the groove bottom connecting surface is larger than the cross-sectional area of ​​the column.

[0010] According to some embodiments of the present invention, the battery cover assembly further comprises: a sealing member, wherein the sealing member is disposed between the inner wall of the mounting hole and the outer wall of the column.

[0011] According to some embodiments of the present invention, the mounting hole is located in the middle of the groove bottom in the length direction of the groove; and / or the connecting member is symmetrically arranged about the central axis of the mounting hole.

[0012] According to some embodiments of the present invention, the cover plate includes: a peripheral plate; and a bottom plate, wherein the bottom plate is connected to the bottom of the peripheral plate and forms the groove together with the peripheral plate.

[0013] According to some embodiments of the present invention, the cover plate is an integrally formed aluminum profile; and / or the connector is one of an aluminum connector and a copper connector.

[0014] According to some embodiments of the present invention, the battery cover assembly further includes: a first adhesive, wherein the first adhesive is disposed on the outer wall of the peripheral plate.

[0015] According to some embodiments of the present invention, the battery cover assembly further comprises: an insulating protection member connected to one side of the cover and extending away from the cover to insulate and isolate the tab of the battery cell from the shell.

[0016] According to some embodiments of the present invention, a chamfer is provided at one end of the insulating protection member away from the cover plate.

[0017] According to some embodiments of the present invention, the chamfer has a chamfered surface, and the chamfered surface forms an angle α with the surface of the insulating protection component, and α satisfies the relationship: 45°≤α≤60°.

[0018] According to the second aspect of the present invention, the battery comprises: a shell; a pole core, the pole core is arranged in the shell, and the pole core has a pole ear; the cover plate assembly of the above-mentioned battery, the cover plate assembly is arranged in the shell, and the connecting member is connected to the pole ear.

[0019] According to some embodiments of the present invention, the cover plate assembly further includes: a first adhesive, which is arranged on the outer wall of the cover plate; the battery further includes: a second adhesive, which is arranged on the inner wall of the shell, and the first adhesive is bonded to the second adhesive.

[0020] According to some embodiments of the present invention, the width of the first adhesive is d1, the thickness of the first adhesive is d2, d1 and d2 satisfy the relationship: 10mm≤d1≤20mm, 0.05mm≤d2≤0.1mm; and / or the width of the second adhesive is d3, the thickness of the second adhesive is d4, d3 and d4 satisfy the relationship: 30mm≤d3≤40mm, 0.05mm≤d4≤0.1mm.

[0021] According to some embodiments of the present invention, the electrode core includes: a positive electrode sheet; a negative electrode sheet, the positive electrode sheet and the negative electrode sheet respectively have the electrode ears; a diaphragm, the diaphragm is located between the positive electrode sheet and the negative electrode sheet, and the negative electrode sheet, the positive electrode sheet and the diaphragm are stacked or wound.

[0022] According to some embodiments of the present invention, the battery further includes: an insulating film, which is wrapped around the outer periphery of the pole core, and the length of the insulating film is less than the length of the diaphragm; and a pole ear protector, which is connected between the root of the pole ear and the edge of the adjacent insulating film.

[0023] According to some embodiments of the present invention, a notch of the groove does not extend beyond an end surface of the housing.

[0024] According to the second aspect of the present invention, a battery assembly device for assembling the battery includes: a head sealing mechanism, the head sealing mechanism includes a first head sealing mechanism and a second head sealing mechanism, the first head sealing mechanism and the second head sealing mechanism are arranged opposite to each other and form a heat-sealing space, and the heat-sealing space is used to heat-seal the shell and the cover plate.

[0025] According to some embodiments of the present invention, the first sealing head and the second sealing head both include: a sealing block, the sealing block being formed with a heat sealing surface corresponding to the heat sealing space; and a heating element, the heating element being arranged in the sealing block to transfer heat to the sealing block.

[0026] According to some embodiments of the present invention, the sealing block includes: a sealing block body, in which the heat-generating element is arranged; a heat-sealing part, which is connected to the sealing block body and forms the heat-sealing surface, and the thickness of the heat-sealing part is smaller than the thickness of the sealing block body.

[0027] According to some embodiments of the present invention, the heat sealing portion is provided with a glue overflow groove, and the glue overflow groove is arranged close to the heat sealing surface.

[0028] According to some embodiments of the present invention, a reinforcing rib is provided at a connection between the sealing block body and the heat sealing portion.

[0029] According to some embodiments of the present invention, the first sealing head and the second sealing head both include: a heat insulating member connected to an end of the sealing block away from the heat sealing surface.

[0030] According to some embodiments of the present invention, the head sealing mechanism includes: a first head sealing mechanism and a second head sealing mechanism, the first head sealing mechanism is used to heat seal the edges of the shell and the cover plate, and the second head sealing mechanism is used to heat seal the corners of the shell and the cover plate.

[0031] A battery pack according to an embodiment of the third aspect of the present invention includes: the above-mentioned battery.

[0032] An electrical device according to an embodiment of the fourth aspect of the present invention includes: the above-mentioned battery pack.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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: Figure 1 is a schematic diagram of a structure in which a cover plate and a pole core are separated according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a housing according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a second adhesive being arranged on the inner wall of a housing according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of a positive electrode cover according to an embodiment of the present invention; Figure 5 is an axonometric view of a positive electrode cover according to an embodiment of the present invention; Figure 6 is a structural schematic diagram of a cover plate assembly of a positive electrode cover plate according to an embodiment of the present invention; Figure 7 is a schematic structural diagram of a negative electrode cover according to an embodiment of the present invention; Figure 8 is an axonometric view of a negative electrode cover according to an embodiment of the present invention; Fig. 9 is a structural schematic diagram of a cover plate assembly of a negative electrode cover plate according to an embodiment of the present invention; Fig.10 is a schematic structural diagram of a cover plate including a mounting portion according to an embodiment of the present invention; Fig.11 is a schematic diagram of the structure of the tab bending according to an embodiment of the present invention; Fig.12is a schematic diagram of a structure in which an insulating protection member is overlapped on a pole core according to an embodiment of the present invention; Fig.13 yes Fig.12 Enlarged view of area A in the middle; Fig.14 is a schematic structural diagram of a heat-sealed shell and a cover plate of a head sealing mechanism according to an embodiment of the present invention; Fig.15 is an axonometric view of a heat-sealing shell and a cover plate of a head sealing mechanism according to an embodiment of the present invention; Fig.16 yes Fig.15 Enlarged view of middle area B; Fig.17 is a schematic structural diagram of a corner of a heat-sealed shell and a cover plate of a head sealing mechanism according to an embodiment of the present invention; Fig.18 is a front view of a corner of a heat-sealed shell and a cover plate of a sealing mechanism according to an embodiment of the present invention; Fig.19 It is a structural schematic diagram of the composition of the pole core according to an embodiment of the present invention.

[0035] Reference numerals: 100. Cover plate assembly; 10. Cover plate; 101. Positive electrode cover plate; 102. Negative electrode cover plate; 11. groove; 12. outer plate; 13. bottom plate; 20. Connecting piece; 21. Connecting plate; 22, mounting portion; 221, column; 222, groove bottom connecting surface; 30. Mounting hole; 40. Sealing member; 50. First bonding glue; 60. Insulation protection part; 61. Chamfer; 611. Chamfered surface; 200. Battery; 80. housing; 81. second adhesive; 90, pole core; 901, positive electrode sheet; 902, negative electrode sheet; 903, diaphragm; 91. Tab; 92. Insulating film; 93. Tab protection piece; 300. Battery assembly device; 301, end cap mechanism; 302, first end cap; 303, second end cap; 304, sealing block; 305, heating element; 310, sealing block body; 311, heat sealing part; 3112, heat sealing surface; 3113, overflow glue groove; 312. Reinforcement ribs; 313. Heat insulation; 314. Tab folding knife; 315. Support rollers. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0037] Reference below Figure 1-Figure 19 The cap plate assembly 100 of the battery 200 according to the embodiment of the present invention is described.

[0038] Reference Figure 1 and Figure 6 As shown, the cover plate assembly 100 of the battery 200 according to the first aspect of the embodiment of the present invention includes: a cover plate 10 and a connector 20, the cover plate 10 is an electrical connection end, the cover plate 10 is provided with a groove 11, the connector 20 is connected to the bottom of the groove 11, and the connector 20 is at least partially located outside the groove 11, so that it can be used to connect with the pole ear 91.

[0039] Specifically, the conventional cover plate assembly is provided with a pole, which is processed as a component, thus increasing the manufacturing cost and reducing the production efficiency. The arrangement of the pole also occupies a large space of the cover plate assembly, reducing the energy density of the battery cell.

[0040] Therefore, it is necessary to optimize the design of the cover plate assembly 100, which is mainly composed of a cover plate 10 and a connector 20. The cover plate 10 is an electrical connection end, that is, the cover plate 10 can be directly connected to a device that requires electricity, so that a pole-less design can be achieved. The cover plate 10 can realize voltage input and output, which can not only reduce the space occupied by traditional poles, but also more internal space can be used to set energy storage materials, thereby improving the energy density of the battery cell.

[0041] Moreover, the cover plate 10 is an electrical connection end and does not need to be provided with a pole, which can reduce the weight of the cover plate assembly 100 and the installation time of the cover plate assembly 100, thereby improving the installation efficiency of the cover plate assembly 100 and reducing the production cost.

[0042] Furthermore, the cover plate 10 is provided with a groove 11, which is in a concave U shape. The arrangement of the groove 11 can form an electrical connection area, so that the cover plate 10 can be directly electrically connected to the outside. By increasing the contact area between the groove 11 and the outside, the resistance can be reduced, and the cover plate 10 can be prevented from being electrically connected to the outside through multiple poles. Since the cover plate 10 is designed without poles, leakage of the electrolyte can also be avoided.

[0043] Moreover, the arrangement of the groove 11 can form an escape space, which can prevent the bottom of the groove 11 from being impacted by external forces, thereby preventing the battery 200 from catching fire.

[0044] In addition, the connector 20 is connected to the bottom of the groove 11, so that the cover 10 can be charged. The connector 20 is at least partially located outside the groove 11, so that it can be used to connect to the pole ear 91, which makes it easier for the battery cell to supply power to the outside world.

[0045] Thus, the cover plate assembly 100 can realize a pole-free design, the cover plate 10 can realize voltage input and output, and can reduce the space occupied by the traditional pole, so that more internal space can be used to set energy storage materials, thereby improving the energy density of the battery cell and avoiding leakage of the electrolyte. In addition, the cover plate 10 is provided with a groove 11, which can increase the contact area between the groove 11 and the outside world, reduce resistance, and avoid the cover plate 10 being electrically connected to the outside through multiple poles.

[0046] According to some embodiments of the present invention, Figure 8 As shown, a mounting hole 30 is provided at the bottom of the groove 11 , and a portion of the connecting member 20 passes through the mounting hole 30 .

[0047] The installation hole 30 can facilitate the insertion of a portion of the connector 20 , so that the cover plate 10 can be electrified through the connector 20 .

[0048] According to some embodiments of the present invention, Fig.10 As shown, the connecting member 20 includes: a connecting plate 21 and a mounting portion 22 . The connecting plate 21 is located outside the groove 11 . The mounting portion 22 is passed through the mounting hole 30 so that it can be connected to the bottom of the groove 11 . The mounting portion 22 is connected to the connecting plate 21 .

[0049] The connecting plate 21 is located outside the groove 11, which facilitates the connection between the connecting plate 21 and the tab 91 of the battery cell. The mounting portion 22 is provided with a mounting hole 30, which increases the contact area between the mounting portion 22 and the mounting hole 30 of the cover plate 10, thereby making the mounting portion 22 and the mounting hole 30 cooperate more stably and firmly.

[0050] According to some embodiments of the present invention, Figure 6 and Fig.10 As shown, the mounting portion 22 includes a column 221 , and a groove bottom connecting surface 222 is formed at one end of the column 221 passing through the mounting hole 30 , and the area of ​​the groove bottom connecting surface 222 is larger than the cross-sectional area of ​​the column 221 .

[0051] Among them, the cross-sectional area of ​​the groove bottom connecting surface 222 is larger than the cross-sectional area of ​​the column 221. The groove bottom connecting surface 222 can be more firmly connected to the groove bottom of the cover plate 10, and can also make the groove bottom of the cover plate 10 charged, and can also prevent the column 221 from shifting or detaching relative to the mounting hole 30.

[0052] According to some embodiments of the present invention, Fig.10As shown, the cover assembly 100 of the battery 200 further includes a sealing member 40 , which is disposed between the inner wall of the mounting hole 30 and the outer wall of the column 221 .

[0053] Among them, the seal 40 can be set as a sealing ring, which is sleeved on the outer wall of the column 221, and the sealing ring is transitionally matched with the inner wall of the mounting hole 30. In this way, the sealing between the outer wall of the column 221 and the inner wall of the mounting hole 30 can be improved, thereby preventing leakage of the electrolyte.

[0054] According to some embodiments of the present invention, Figure 8 As shown, the mounting hole 30 is located in the middle of the groove bottom of the groove 11 in the length direction, and / or the connecting member 20 is symmetrically arranged about the central axis of the mounting hole 30 .

[0055] The mounting hole 30 is located in the middle of the bottom of the groove 11 in the length direction, so that the force balance of the cover plate 10 can be improved and the mounting hole 30 can be prevented from being torn due to local uneven force.

[0056] Furthermore, the connector 20 is symmetrically arranged about the central axis of the mounting hole 30 , which can make the current more evenly distributed in the connector 20 and reduce local overheating.

[0057] According to some embodiments of the present invention, Figure 8 As shown, the cover plate 10 includes: an outer plate 12 and a bottom plate 13 . The bottom plate 13 is connected to the bottom of the outer plate 12 , and the bottom plate 13 and the outer plate 12 together form a groove 11 .

[0058] The groove 11 can accommodate other sealing materials, so as to improve the sealing performance of the electrical connection between the cover plate 10 and the outside, thereby preventing impurities such as moisture and dust from entering the interior.

[0059] Furthermore, the peripheral plate 12 can provide additional protection to prevent the battery cell from being affected by the external environment, such as corrosion and impact.

[0060] According to some embodiments of the present invention, the cover plate 10 is an integrally formed aluminum profile, and / or the connector 20 is one of an aluminum connector 20 and a copper connector 20 .

[0061] Among them, the one-piece aluminum profile cover plate 10 has no welding or splicing points, has better integrity, and has higher structural strength and rigidity, so it can withstand external impact and vibration.

[0062] Moreover, the aluminum profile has good thermal conductivity, and the cover plate 10 of the aluminum profile can better guide and dissipate the heat generated when the battery core is working, which can improve the heat dissipation efficiency and extend the service life of the battery core.

[0063] Further, the connector 20 is one of an aluminum connector 20 and a copper connector 20. When the connector 20 is an aluminum connector 20, the cover plate 10 can be formed into a positive electrode cover plate 101. When the connector 20 is a copper connector 20, the cover plate 10 can be formed into a negative electrode cover plate 102.

[0064] According to some embodiments of the present invention, Figure 8 As shown, the cover plate assembly 100 of the battery 200 further includes: a first adhesive 50 , and the first adhesive 50 is disposed on the outer wall of the cover plate 10 .

[0065] Among them, the first adhesive 50 can be a hot melt adhesive, and the first adhesive 50 is arranged on the outer wall of the cover plate 10, so that it is convenient to bond the cover plate 10 and the shell 80 of the battery 200, so as to avoid the appearance of welding pores and welding holes between the cover plate 10 and the shell 80 of the battery 200, thereby improving the sealing quality of the cover plate 10 and the shell 80 of the battery 200.

[0066] According to some embodiments of the present invention, Figure 6 and Figure 8 As shown, the cover assembly 100 of the battery 200 also includes: an insulating protective member 60, which is connected to one side of the cover 10 and extends away from the cover 10, so that the tab 91 of the battery cell and the shell 80 can be insulated and isolated.

[0067] Among them, the insulating protection part 60 can be set as a polyethylene terephthalate (PET) sheet. The PET sheet has good insulation properties and can insulate and isolate the pole ear 91 of the battery cell and the shell 80 of the battery 200. It can avoid using hard plastic to cover the pole ear 91 at the root of the pole ear 91 to prevent the pole ear 91 from contacting the shell 80, and it can also not occupy the root space of the pole ear 91, thereby improving space utilization.

[0068] According to some embodiments of the present invention, Fig.13 As shown, the end of the insulating protection member 60 away from the cover plate 10 is provided with a chamfer 61. In this way, the insulating protection member 60 can be quickly inserted between the insulating film 92 and the housing 80, and interference between the insulating protection member 60 and the housing 80 can be avoided, and the efficiency of inserting the insulating protection member 60 into the housing 80 can be improved.

[0069] According to a specific embodiment of the present invention, Fig.13 As shown, the chamfer 61 has a chamfer 61 surface, and the chamfer 61 surface forms an angle α with the surface of the insulating protection member 60, and α satisfies the relationship: 45°≤α≤60°.

[0070] Specifically, when the angle α formed by the chamfered surface 61 and the surface of the insulating protection member 60 can be set to 50°, the insulating protection member 60 can be effectively guided into the housing 80, the resistance can be reduced, and the installation efficiency can be improved.

[0071] like Figure 1 As shown, the battery 200 according to the embodiment of the second aspect of the present invention includes: a shell 80, a pole core 90 and a cover assembly 100 of the battery 200 of the above embodiment, the pole core 90 is arranged in the shell 80, the pole core 90 has a pole ear 91, the cover assembly 100 is arranged in the shell 80, and the connecting piece 20 is connected to the pole ear 91.

[0072] The housing 80 can protect the pole core 90, and the direct connection between the connector 20 and the pole lug 91 can ensure the high efficiency and stability of current transmission. The cover plate assembly 100 is disposed in the housing 80 to cover the pole core 90, thereby preventing leakage of the electrolyte.

[0073] According to some embodiments of the present invention, the cover plate assembly 100 further includes: a first adhesive 50 and a second adhesive 81, the first adhesive 50 is arranged on the outer wall of the cover plate 10, and the battery 200 further includes: a second adhesive 81 is arranged on the inner wall of the shell 80, and the first adhesive 50 and the second adhesive 81 are bonded together.

[0074] The first adhesive 50 and the second adhesive 81 can both be set to polypropylene (PP hot melt adhesive), and the outer periphery of the notch of the cover plate 10 (the long sides, short sides and corners around the notch) are coated with PP hot melt adhesive, and at the same time, the inner wall of the shell opening of the shell 80 is coated with PP hot melt adhesive. In this way, the connection between the cover plate 10 and the shell 80 can be made more stable and firm, and welding pores and welding holes between the cover plate 10 and the shell 80 of the battery 200 can be avoided, thereby improving the connection quality between the cover plate 10 and the shell 80 of the battery 200.

[0075] Moreover, the PP hot melt adhesive of the cover plate 10 and the PP hot melt adhesive of the shell 80 are surface-attached after the tab 91 is bent. The PP hot melt adhesive has a certain elastic deformation, and the matching gap between the cover plate 10 and the shell 80 adopts a transition fit, which can prevent the PP hot melt adhesive from having local bubbles and pores during the subsequent heat sealing process.

[0076] According to some embodiments of the present invention, the width of the first adhesive 50 is d1, the thickness of the first adhesive 50 is d2, d1 and d2 satisfy the relationship: 10mm≤d1≤20mm, 0.05mm≤d2≤0.1mm, and / or the width of the second adhesive 81 is d3, the thickness of the second adhesive 81 is d4, d3 and d4 satisfy the relationship: 30mm≤d3≤40mm, 0.05mm≤d4≤0.1mm.

[0077] Among them, the width d1 of the first adhesive 50 can be set to 15 mm, so as to increase the contact area between the first adhesive 50 and the outer wall of the cover plate 10, and the thickness d2 of the first adhesive 50 can be set to 0.1 mm, so as to make the connection between the outer wall of the cover plate 10 and the inner wall of the shell 80 more stable and firm.

[0078] Similarly, the width d3 of the second adhesive 81 can be set to 35 mm, and the thickness d2 of the first adhesive 50 can be set to 0.1 mm, thereby further improving the stability of the connection between the outer wall of the cover plate 10 and the inner wall of the shell 80 .

[0079] Furthermore, the width d3 of the second adhesive 81 is greater than the width d1 of the first adhesive 50 , thereby preventing the edge of the cover plate 10 from contacting the housing 80 .

[0080] According to some embodiments of the present invention, Fig.19 As shown, the electrode core 90 includes: a positive electrode sheet 901, a negative electrode sheet 902 and a separator 903. The positive electrode sheet 901 and the negative electrode sheet 902 respectively have a pole ear 91. The separator 903 is located between the positive electrode sheet 901 and the negative electrode sheet 902. The negative electrode sheet 902, the positive electrode sheet 901 and the separator 903 are stacked or wound.

[0081] Among them, the pole core 90 is composed of a negative electrode sheet 902, a diaphragm 903, and a positive electrode sheet 901. The negative electrode sheet 902 and the positive electrode sheet 901 are in the form of die-cut pole ears 91. The die-cut pole ears 91 of the positive and negative poles are located on both sides of the pole core 90. The pole ears 91 can be arranged on both sides of the pole core 90 in a central or offset manner.

[0082] According to some embodiments of the present invention, Fig.12 As shown, the battery 200 also includes: an insulating film 92 and a pole ear protection member 93, the insulating film 92 is wrapped around the outer periphery of the pole core 90, the length of the insulating film 92 is less than the length of the diaphragm 903, and the pole ear protection member 93 is connected between the root of the pole ear 91 and the edge of the adjacent insulating film 92.

[0083] Among them, the insulating film 92 is 10mm to 20mm shorter than the length of the diaphragm 903 in the length direction of the pole core 90, and the edge of the insulating film 92 at the large surface of the pole core 90 is bonded to the positive and negative pole ears 91 with tape, and the length of the tape completely covers the root of the ear 91.

[0084] Moreover, the insulating film 92 is a polypropylene (PP) film, which can prevent the pole core 90 from contacting the shell 80. The thickness of the insulating film 92 is generally selected to be 80um to 100um. The insulating film 92 is coated on the periphery of the pole core 90, thereby improving the safety of the battery 200.

[0085] In addition, the tab protection member 93 can be configured as a tab 91 protection glue, so as to protect the base of the tab 91 .

[0086] In addition, the assembly of the cover plate 10 and the shell 80 is coordinated by bending the pole ear 91. The aluminum connector 20 of the positive cover plate 101 and the positive pole ear 91 are laser welded together, and the copper connector 20 of the negative cover plate 102 and the negative pole ear 91 are also laser welded, and the positive and negative pole ears 91 are located on both sides of the shell opening. Among them, the overall bending shape of the pole ear 91 presents a semicircular arc shape. The process is carried out by a folding knife. First, the folding knife positions the upper surface of the pre-folding position, which is 2mm-5mm from the shell opening. The lower surface of the pole ear 91 is followed by a roller 315. The folding knife is inserted and bent from the upper surface. The roller 315 is used to shape the bent pole ear 91. After the pole ear 91 is bent, the cover plate 10 cooperates with the shell opening through a clamp. After the PET sheet embedded in the lower surface of the cover plate 10 is inserted into the shell opening, it slides into the bottom of the shell 80 along the edge of the pole ear protection member 93.

[0087] According to some embodiments of the present invention, the notch of the groove 11 does not extend beyond the end surface of the housing 80 .

[0088] In this way, the notches of the groove 11 can be prevented from colliding, thereby preventing the notches of the groove 11 from deforming. Moreover, the cover plate 10 is located in the housing 80, so that the connection strength between the housing 80 and the cover plate 10 can be further improved.

[0089] like Figure 14-18 As shown, a battery assembly device 300 for assembling a battery 200 according to an embodiment of the second aspect of the present invention includes: a head sealing mechanism 301, the head sealing mechanism 301 includes a first head sealing mechanism 302 and a second head sealing mechanism 303, the first head sealing mechanism 302 and the second head sealing mechanism 303 are arranged opposite to each other, and the first head sealing mechanism 302 and the second head sealing mechanism 303 form a heat-sealing space, and the heat-sealing space is used for heat-sealing the shell 80 and the cover plate 10.

[0090] Among them, the first head 302 and the second head 303 can heat and pressurize the PP hot melt adhesive on the inner wall of the shell 80 and the PP hot melt adhesive on the outer wall of the cover plate 10. As the pressure increases, the PP hot melt adhesive on the inner wall of the shell 80 and the outer wall of the cover plate 10 adhere to each other to achieve a heat-sealing effect, thereby making the connection between the inner wall of the shell 80 and the outer wall of the cover plate 10 more stable and firm.

[0091] According to some embodiments of the present invention, Figure 14-16 As shown, the first sealing head 302 and the second sealing head 303 both include: a sealing block 304 and a heating element 305 . The sealing block 304 is formed with a heat sealing surface 3112 corresponding to the heat sealing space. The heating element 305 is arranged in the sealing block 304 so as to transfer heat to the sealing block 304 .

[0092] Among them, the heating element 305 can be set as a heating tube, and the heating element 305 can be inserted into the sealing block 304. Since the sealing block 304 is a heat conductor, for example, the sealing block 304 can be set as a beryllium bronze block with good thermal conductivity, so that the heat of the heating element 305 can be transferred to the sealing block 304. In this way, the sealing block 304 can be used to heat-seal the shell 80 and the cover plate 10.

[0093] According to some embodiments of the present invention, Fig.17 As shown, the sealing block 304 includes: a sealing block body 310 and a heat sealing portion 311, the heating element 305 is arranged in the sealing block body 310, the heat sealing portion 311 is connected to the sealing block body 310, and the heat sealing portion 311 is formed with a heat sealing surface 3112, and the thickness of the heat sealing portion 311 is less than the thickness of the sealing block body 310.

[0094] The arrangement of the sealing block body 310 can provide an installation space for the heating element 305, thereby facilitating the installation of the heating element 305. The heat sealing portion 311 is formed with a heat sealing surface 3112, which can heat and pressurize the PP hot melt adhesive of the shell 80 and the cover plate 10, thereby making the connection between the shell 80 and the cover plate 10 more stable.

[0095] Moreover, the thickness of the heat-sealing portion 311 is smaller than the thickness of the sealing block body 310, so that the heat transfer speed can be accelerated.

[0096] According to some embodiments of the present invention, the heat sealing portion 311 is provided with a glue overflow groove 3113 , and the glue overflow groove 3113 is arranged close to the heat sealing surface 3112 .

[0097] The overflow glue groove 3113 is used to collect the PP hot melt glue squeezed out of the heat sealing portion 311 , thereby preventing the hot melt glue from contaminating the surfaces of the first sealing head 302 and the second sealing head 303 .

[0098] According to some embodiments of the present invention, Fig.14 As shown, a reinforcing rib 312 is provided at the connection between the sealing block body 310 and the heat sealing portion 311 .

[0099] When the heat sealing surface 3112 enters the inner side of the groove 11 of the cover plate 10 for pressurized heat sealing, a plurality of reinforcing ribs 312 are provided at the connection between the sealing block body 310 and the heat sealing portion 311 to prevent deformation thereof, thereby improving the strength of the sealing block 304 .

[0100] According to some embodiments of the present invention, Fig.15 As shown, the first sealing head 302 and the second sealing head 303 both include: a heat insulating member 313 , and the heat insulating member 313 is connected to an end of the sealing block 304 away from the heat sealing surface 3112 .

[0101] The heat insulating member 313 can be set as a heat insulating stone, and the heat insulating member 313 is connected to the end of the sealing block 304 away from the heat sealing surface 3112, which can prevent heat loss and facilitate heat insulation with the heat sealing portion 311.

[0102] According to some embodiments of the present invention, the sealing mechanism 301 includes: a first sealing mechanism and a second sealing mechanism, the first sealing mechanism is used to heat-seal the edges of the shell 80 and the cover plate 10, and the second sealing mechanism is used to heat-seal the corners of the shell 80 and the cover plate 10.

[0103] Specifically, the first sealing mechanism is used to heat-seal the edges of the shell 80 and the cover plate 10, that is, the first sealing head 302 and the second sealing head 303 in the first sealing mechanism heat-seal the planes of the shell 80 and the cover plate 10. The second sealing mechanism is used to heat-seal the corners of the shell 80 and the cover plate 10. The first sealing head 302 and the second sealing head 303 in the second sealing mechanism can be L-shaped, and the heat-sealing surface 3112 thereof is a contoured surface, and its rounded corner is consistent with the bending angle of the shell 80, so that the fit can be more closely, so that the corners of the shell 80 and the cover plate 10 can be heat-sealed conveniently.

[0104] A battery pack 200 according to an embodiment of the third aspect of the present invention comprises: the battery 200 of the above embodiment.

[0105] The electrical equipment according to the fourth embodiment of the present invention includes: the battery pack 200 of the above embodiment.

[0106] 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 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, 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 should not be understood as limiting the present invention.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0108] Although the 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 present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cover assembly (100), characterized in that: include: A cover plate (10), the cover plate (10) being an electrical connection end, the cover plate (10) being provided with a groove (11); as well as A connecting piece (20), the connecting piece (20) being connected to the groove bottom of the groove (11) and at least partially located outside the groove (11) for connecting to the pole lug (91).

2. The battery cover assembly (100) according to claim 1, characterized in that: A mounting hole (30) is provided at the bottom of the groove (11), and a portion of the connecting member (20) passes through the mounting hole (30).

3. The battery cover assembly (100) according to claim 2, characterized in that: The connecting member (20) comprises: A connecting plate (21), the connecting plate (21) being located outside the groove (11); A mounting portion (22), the mounting portion (22) being inserted through the mounting hole (30) to be connected to the groove bottom of the groove (11), and the mounting portion (22) being connected to the connecting plate (21).

4. The battery cover assembly (100) according to claim 3, characterized in that: The mounting portion (22) comprises: A column (221), wherein one end of the column (221) passing through the mounting hole (30) is formed with a groove bottom connecting surface (222), and the other end of the column (221) is connected to the connecting plate (21), and the area of ​​the groove bottom connecting surface (222) is larger than the cross-sectional area of ​​the column (221).

5. The battery cover assembly (100) according to claim 4, characterized in that: Also includes: A sealing member (40) is arranged between an inner wall of the mounting hole (30) and an outer wall of the column (221).

6. The battery cover assembly (100) according to claim 2, characterized in that: The mounting hole (30) is located in the middle of the groove bottom of the groove (11) in the length direction; and / or The connecting piece (20) is symmetrically arranged with respect to the central axis of the mounting hole (30).

7. The battery cover assembly (100) according to claim 1, characterized in that: The cover plate (10) comprises: Peripheral plate (12); A bottom plate (13), the bottom plate (13) being connected to the bottom of the peripheral plate (12) and forming the groove (11) together with the peripheral plate (12).

8. The battery cover assembly (100) according to claim 1, characterized in that: The cover plate (10) is an integrally formed aluminum profile; and / or The connecting piece (20) is one of an aluminum connecting piece (20) and a copper connecting piece (20).

9. The battery cover assembly (100) according to claim 7, characterized in that: The battery cover assembly (100) further comprises: A first adhesive (50), the first adhesive (50) being arranged on the outer wall of the peripheral plate (12).

10. The battery cover assembly (100) according to claim 1, characterized in that: Also includes: An insulating protective member (60) is connected to one side of the cover plate (10) and extends in a direction away from the cover plate (10) so as to insulate and isolate the electrode tab (91) of the battery cell from the housing (80).

11. The battery cover assembly (100) according to claim 10, characterized in that: An end of the insulating protection member (60) away from the cover plate (10) is provided with a chamfer (61).

12. The battery cover assembly (100) according to claim 11, characterized in that: The chamfer (61) has a chamfered surface, and the chamfered surface forms an included angle α with the surface of the insulating protection member (60), wherein α satisfies the relationship: 45°≤α≤60°.

13. A battery, characterized in that: include: Housing (80); A pole core (90), the pole core (90) being arranged in the housing (80), the pole core (90) having a pole ear (91); A cover plate assembly (100) of a battery according to any one of claims 1 to 12, wherein the cover plate assembly (100) is arranged in the housing (80), and the connector (20) is connected to the tab (91).

14. The battery according to claim 13, characterized in that The cover plate assembly (100) further comprises: A first adhesive (50), the first adhesive (50) being arranged on the outer wall of the cover plate (10); The battery also includes: A second adhesive (81), wherein the second adhesive (81) is disposed on the inner wall of the housing (80), and the first adhesive (50) and the second adhesive (81) are bonded and matched.

15. The battery according to claim 14, characterized in that The width of the first adhesive (50) is d1, the thickness of the first adhesive (50) is d2, and d1 and d2 satisfy the relationship: 10 mm ≤ d1 ≤ 20 mm, 0.05 mm ≤ d2 ≤ 0.1 mm; and / or The width of the second adhesive (81) is d3, the thickness of the second adhesive (81) is d4, and d3 and d4 satisfy the relationship: 30 mm ≤ d3 ≤ 40 mm, 0.05 mm ≤ d4 ≤ 0.1 mm.

16. The battery according to claim 13, characterized in that The pole core (90) comprises: Positive electrode (901); A negative electrode sheet (902), wherein the positive electrode sheet (901) and the negative electrode sheet (902) respectively have the electrode tab (91); A diaphragm (903), the diaphragm (903) being located between the positive electrode sheet (901) and the negative electrode sheet (902), the negative electrode sheet (902), the positive electrode sheet (901) and the diaphragm (903) being stacked or wound.

17. The battery according to claim 16, characterized in that Also includes: An insulating film (92), the insulating film (92) being wrapped around the outer circumference of the pole core (90), the length of the insulating film (92) being shorter than the length of the diaphragm (903); A pole lug protection member (93), the pole lug protection member (93) being connected between a root of the pole lug (91) and an edge of an adjacent insulating film (92).

18. The battery according to claim 13, characterized in that The notch of the groove (11) does not extend beyond the end surface of the housing (80).

19. A battery assembly device (300) for assembling the battery according to any one of claims 13 to 18, characterized in that: include: A sealing mechanism (301), the sealing mechanism (301) comprising a first sealing mechanism (302) and a second sealing mechanism (303), the first sealing mechanism (302) and the second sealing mechanism (303) being arranged relative to each other and forming a heat-sealing space, the heat-sealing space being used for heat-sealing the shell (80) and the cover plate (10).

20. The battery assembly device (300) of claim 19, characterized in that: The first end cap (302) and the second end cap (303) both include: A sealing block (304), wherein the sealing block (304) is formed with a heat sealing surface (3112) corresponding to the heat sealing space; A heating element (305), wherein the heating element (305) is arranged in the sealing block (304) to transfer heat to the sealing block (304).

21. The battery assembly device (300) of claim 20, characterized in that: The sealing block (304) comprises: A sealing block body (310), wherein the heating element (305) is arranged in the sealing block body (310); A heat sealing portion (311), the heat sealing portion (311) is connected to the sealing block body (310) and is formed with the heat sealing surface (3112), and the thickness of the heat sealing portion (311) is smaller than the thickness of the sealing block body (310).

22. The battery assembly device (300) of claim 21, characterized in that: The heat sealing portion (311) is provided with a glue overflow groove (3113), and the glue overflow groove (3113) is arranged close to the heat sealing surface (3112).

23. The battery assembly device (300) of a battery according to claim 21, characterized in that: A reinforcing rib (312) is provided at the connection between the sealing block body (310) and the heat sealing portion (311).

24. The battery assembly device (300) of a battery according to claim 20, characterized in that: The first end cap (302) and the second end cap (303) both include: A heat insulating member (313), wherein the heat insulating member (313) is connected to an end of the sealing block (304) away from the heat sealing member (3112).

25. The battery assembly device (300) of a battery according to claim 19, characterized in that: The sealing mechanism (301) comprises: a first sealing mechanism and a second sealing mechanism, the first sealing mechanism being used for heat-sealing the edges of the shell (80) and the cover plate (10), and the second sealing mechanism being used for heat-sealing the corners of the shell (80) and the cover plate (10).

26. A battery pack, characterized in that: include: The battery according to any one of claims 13 to 18.

27. An electrical equipment, characterized in that: include: The battery pack as claimed in claim 26.

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