Batteries and electronic devices

Abstract

The present disclosure provides a battery and an electronic device. The battery is a cell including a bare cell and a case, the bare cell has tabs, the case covers the bare cell, a recess and an electrode are provided at an electrode end of the case, the electrode is electrically connected to the tab, a cell, a protection board module electrically connected to the electrode and having at least a part of its structure fitted into the recess, and an insulating spacer installed between the cell and the protection board module to separate the cell and the protection board module. According to the battery of the present disclosure, by providing a recess on an end face of an electrode end of the cell and installing at least a part of the protection board module in the recess, the space utilization rate of the battery is increased, the length of the battery is shortened, and the energy density is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of energy storage technologies, and particularly to batteries and electronic devices.

Background Art

[0002] With the development of battery technologies, an increasing number of electronic devices are adopting batteries as energy storage and supply devices.

[0003] As the intelligence of power consumption control in electronic devices increases, more and more electronic components have been gradually integrated on the battery protection board. The increase in electronic components causes an increase in the battery size, which is disadvantageous for the optimization of the battery structure layout and the improvement of energy density. Therefore, in order to improve the space utilization rate of the battery, it is necessary to provide a new layout mode for the internal structure of the battery.

Summary of the Invention

[0004] The present disclosure provides a battery and an electronic device. The battery has a high space utilization rate, so the energy density of the battery is high.

[0005] The first aspect of the present disclosure provides a battery. The battery includes a cell, a protection board module, and an insulating spacer. The cell includes a bare cell and a case. The bare cell has tabs. The case covers the bare cell. A recess and an electrode are provided at the electrode end of the case. The electrode is electrically connected to the tab. At least a part of the structure of the protection board module is fitted into the recess, and the protection board module is electrically connected to the electrode. The insulating spacer is installed between the cell and the protection board module to separate the cell and the protection board module.

[0006] According to the battery of the present disclosure, by providing a recess at the electrode end of the cell and installing at least a part of the protection board module in the recess, the space utilization rate can be increased, the overall length of the battery can be shortened, and the battery can have a higher energy density even with the same size.

[0007] Selectively, the recess and the electrode are offset horizontally, and the protective plate module includes a module body and an electrode connecting plate, the module body being located within the recess, and the electrode connecting plate having one end connected to the module body and the other end extending above the electrode and electrically connected to the electrode.

[0008] According to some embodiments of this disclosure, the module body includes a substrate and electronic components, the electronic components being mounted on the substrate and located within recesses.

[0009] In some embodiments, the electrodes include a first electrode and a second electrode, the recess is located between the first and second electrodes, and the recess penetrates the end face of the cell along the thickness direction. Alternatively, the recess is located on one side of the electrode along the thickness direction of the cell, and the recess is formed by recessing at least a portion of the edge on one side of the end face along the thickness direction. Alternatively, two recesses are provided, each located at both ends of the end face along the width direction of the cell, and both the first and second electrodes are located between the two recesses.

[0010] In some other embodiments, the electrodes include a first electrode and a second electrode, and multiple recesses are provided, with at least one of the first electrode and the second electrode located within a recess.

[0011] Selectively, at least a portion of the structure of the protective plate module is located within a recess where no electrodes are installed.

[0012] Selectively, at least some of the structures of the insulating spacer are located within the recess.

[0013] In some embodiments, the protective plate module further includes electrical connection terminals for connecting to an external circuit.

[0014] Selectively, the battery further includes an injection-molded member, the injection-molded member is installed at the electrode ends of the case, the injection-molded member seals a protective plate module, and the electrical connection terminals extend to the outside of the injection-molded member.

[0015] Selectively, injection-molded components are suitable for filling the gap between the protective plate module and the recess.

[0016] Selectively, the width of the injection-molded component is less than or equal to the width of the case.

[0017] According to some embodiments of the present disclosure, the battery further includes an electrode connect sheet connected to a tab and an electrode, respectively.

[0018] In one specific example, the case is a metal component, and / or the insulating spacer is a polyester resin component.

[0019] In some embodiments, the protective plate module includes a protective member having a sensing end, which is attached to the end face of one end of the case such that the sensing end is directed toward the bare cell.

[0020] Selectively, the tabs include a first pole tab and a second pole tab.

[0021] In one specific example, the recess has dimensions of 3 to 20 mm in the direction from the first pole tab to the second pole tab, and / or the recess has dimensions of 2 to 5 mm in the longitudinal extension direction of the first pole tab.

[0022] Selectively, the protective member includes a first connection terminal and a second connection terminal, the first connection terminal being connected to a first pole tab and the second connection terminal being connected to a circuit board assembly.

[0023] Selectively, the cell includes a first connector located outside the case, a first pole tab is electrically connected to the first connector, and the first pole tab is electrically connected to a first connection terminal via the first connector.

[0024] Optionally, the cell includes a first metal plate. The first metal plate connects the protection member and the first connection portion. The first metal plate includes a first flat plate portion and a second flat plate portion that are distributed in a stepped manner. The first flat plate portion is located between the second flat plate portion and the main body. The first flat plate portion is connected to the protection member, and the second flat plate portion is connected to the first connection portion.

[0025] Optionally, the cell includes a second metal plate. The second metal plate connects the protection member and the circuit board assembly. The second metal plate includes a first connection lug connected to the second connection terminal and a plate-shaped main body. One end of the plate-shaped main body away from the second connection terminal is connected to the circuit board assembly.

[0026] Optionally, a second connection lug is provided at one end of the plate-shaped main body away from the second connection terminal. The plate-shaped main body is connected to the circuit board assembly through the second connection lug.

[0027] Optionally, it further includes a circuit board assembly. The cell includes at least two cells. The at least two cells are symmetrically distributed along the circuit board assembly.

[0028] Optionally, the circuit board assembly includes a control circuit and a circuit board supporting the control circuit. The at least two cells are distributed on both sides of the circuit board assembly.

[0029] Optionally, the battery includes an insulating fastening unit covering the cell and the circuit board assembly.

[0030] Optionally, the insulating fastening unit includes an insulating film. The insulating film includes an insulating film base material layer. The insulating film base material layer is adhered to the cell and / or the circuit board assembly through an insulating film adhesive layer.

[0031] Optionally, the insulating film includes an insulating film heat conduction layer covering the insulating film base material layer. The insulating film includes a plurality of insulating film adhesive layers. One of the plurality of insulating film adhesive layers is distributed between the insulating film heat conduction layer and the insulating film base material layer.

[0032] Selectively, the insulating fastening unit further includes a plastic fixing bracket that is installed between the insulating film and the circuit board assembly and / or cell.

[0033] A second aspect of the present disclosure further provides an electronic device, the electronic device comprising a device body having a battery housing chamber and a battery according to the first aspect of the present disclosure, the battery being installed in the battery housing chamber and electrically connected to the device body.

[0034] According to the electronic device of this disclosure, by installing the battery of the first embodiment described above, the volume of the housing can be saved and the space utilization rate can be improved, contributing to the miniaturization of the electronic device. [Brief explanation of the drawing]

[0035] To more clearly illustrate the embodiments of this disclosure or the technical solutions in the prior art, the following is a brief introduction to the drawings that may be used in describing the embodiments or the prior art. Needless to say, the drawings in the following description are some embodiments of this disclosure, and those skilled in the art may obtain other drawings based on these without any creative effort. [Figure 1] This is a schematic diagram of an exploded battery according to one embodiment of the present disclosure. [Figure 2] This is a schematic diagram of a part of the structure of a cell according to one embodiment of the present disclosure. [Figure 3] This is a schematic cross-sectional view of the battery corresponding to the cell in Figure 2. [Figure 4] This is a schematic diagram of a part of the structure of a cell relating to another embodiment of the present disclosure. [Figure 5] This is a schematic cross-sectional view of the battery corresponding to the cell in Figure 4. [Figure 6] This is a schematic diagram of the battery structure at one angle, corresponding to the cell in Figure 4. [Figure 7] This is a schematic diagram of the battery structure from a different angle, corresponding to the cell in Figure 4. [Figure 8] This is a schematic diagram of the partial structure of the battery corresponding to the cell in Figure 4. [Figure 9] This is a schematic diagram of a part of the structure of a cell relating to another embodiment of the present disclosure. [Figure 10] This is a schematic cross-sectional view of the battery corresponding to the cell in Figure 9. [Figure 11] This is a schematic diagram of a part of the structure of a cell relating to another embodiment of the present disclosure. [Figure 12] This is a schematic cross-sectional view of the battery corresponding to the cell in Figure 11. [Figure 13] This is a schematic diagram of the structure of a battery according to another embodiment of the present disclosure. [Figure 14] Figure 13 is a schematic diagram of the battery core unit structure. [Figure 15] Figure 13 is a schematic diagram of the structure of some of the components of the battery. [Figure 16] Figure 13 is a schematic diagram of a partial cross-section of the battery. [Figure 17] This is an enlarged schematic diagram of the second metal plate in Figure 15. [Figure 18] This is an enlarged schematic diagram of the first metal plate in Figure 15. [Figure 19] Figure 13 is a schematic diagram of a partial cross-section of the battery. [Figure 20] Figure 13 is a schematic cross-sectional view of the battery's insulating film. [Figure 21] Figure 13 is a schematic cross-sectional view of a modified example of the battery's insulating film. [Modes for carrying out the invention]

[0036] Examples of embodiments of this disclosure will be described in detail below. Examples of such embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are for interpretation purposes only, and should not be understood as limiting this disclosure.

[0037] The battery 100 according to the embodiment of this disclosure will be described below with reference to Figures 1 to 12.

[0038] As shown in Figures 1 and 6 to 8, the battery 100 according to the embodiment of this disclosure includes a cell 1, a protective plate module 2, and an insulating spacer 3.

[0039] Specifically, cell 1 may include a bare cell 12 and a case 11. The bare cell 12 has tabs 121, and the case 11 covers the bare cell 12, and the case 11 can protect the bare cell 12 and improve the safety of the battery 100. The electrode ends of the case 11 are provided with recesses 112 and electrodes 111, and the electrodes 111 and tabs 121 are electrically connected inside the case 11, and the tabs are first electrode tabs (for example, positive electrode tabs) B ) and the second electrode tab (for example, the negative electrode tab) B ) may include. For example, the recess 112 may be recessed inward along the longitudinal direction of cell 1. The electrode 111 may be placed inside the recess 112, or it may be placed outside the recess 112 and separated from the recess 112.

[0040] The protective plate module 2 has at least a portion of its structure fitted into the recess 112, and the protective plate module 2 is electrically connected to the electrode 111. The protective plate module 2 and the electrode 111 are electrically connected on the outside of the case 11. The protective plate module 2 provides protection during the charging and discharging process of cell 1, preventing problems such as overcharging, over-discharging, overcurrent, short circuits, and ultra-high temperature charging and discharging. For example, the protruding portion of the protective plate module 2 may be placed inside the recess 112, or the entire protective plate module 2 may be fitted into the recess 112. The insulating spacer 3 is placed between cell 1 and protective plate module 2 to separate cell 1 and protective plate module 2, thereby preventing a short circuit between protective plate module 2 and cell 1.

[0041] According to the embodiment of the present disclosure, by providing a recess 112 on the end face of the electrode end of the cell 1 and placing at least a portion of the protective plate module 2 within the recess 112, the space utilization rate can be improved and the overall length of the battery 100 can be shortened, resulting in a higher energy density for the same size battery.

[0042] According to some embodiments of this disclosure, the recess 112 and the electrode 111 may be offset horizontally. The protective plate module 2 may include a module body 21 and an electrode connection plate 23. To make full use of the space of the recess 112, the module body 21 is located within the recess 112. The electrode connection plate 23 has one end connected to the module body 21 and the other end extending above the electrode 111 and electrically connected to the electrode 111. In this way, it is possible to avoid increasing the length of the battery 100 by directly installing the entire protective plate module 2 on the side of the electrode 111 that is away from the cell 1. An increased length of the battery 100 is disadvantageous in reducing the space occupied by the battery 100 and improving energy density.

[0043] Furthermore, the module body 21 may include a substrate (not shown) and electronic components (not shown). The electronic components are installed on the side of the substrate facing the cell 1, and the electronic components protrude from the substrate, that is, the electronic components constitute the protruding portion of the protective plate module 2. When assembling the protective plate module 2 and the cell 1, the electronic components may be fitted into the recesses 112 of the cell 1, or the entire protective plate module 2 may be fitted into the recesses 112. In this way, the space of the recesses 112 can be fully utilized, optimizing the structural layout of the battery 100, improving space utilization efficiency, and contributing to shortening the length of the battery 100.

[0044] In some embodiments, the electrode 111 may include a first electrode 111a and a second electrode 111b, the first electrode 111a and the second electrode 111b being spaced apart along the width direction of the cell 1, and both the first electrode 111a and the second electrode 111b being spaced apart from each other from the recess 112. In this way, when the electronic components of the protective plate module 2 are installed in the recess 112 of the cell 1, problems such as mutual interference and short circuits due to erroneous contact between the electrode 111 and the electronic components can be more reliably avoided.

[0045] Selectively, as shown in Figures 2 and 3, the recess 112 may be located between the first pole 111a and the second pole 111b, and the recess 112 may penetrate the end face of cell 1 along the thickness direction of cell 1. In other words, the first pole 111a, recess 112, and second pole 111b of cell 1 are arranged sequentially spaced apart along the width direction of cell 1. In this case, the substrate of the protective plate module 2 is placed outside the recess 112 to facilitate connection to the first pole 111a and the second pole 111b, and the length of the battery 100 is shortened and the volume reduced by placing the electronic components inside the recess 112.

[0046] Selectively, as shown in Figures 4 and 5-8 or Figures 9 and 10, the recess 112 and the electrode 111 are spaced apart along the thickness direction of the cell 1, and the recess 112 is formed by recessing inward at least a portion of one side edge in the thickness direction of the end face of the cell 1. For example, Figure 9 As shown, the recess 112 may extend completely through the end face of the cell 1 along one edge in the thickness direction, or, as shown in Figure 4, for example, the recess 112 may be formed by recessing only a portion of one edge in the thickness direction of the end face of the cell 1 inward. Needless to say, the length of the recess 112 may be reasonably determined according to the number and location of electronic components in the protective plate module 2, thus simplifying the structure and facilitating manufacturing.

[0047] Selectively, as shown in Figures 11 and 12, two recesses 112 may be provided, each located at both ends of the end face of cell 1 in the width direction of cell 1, and both the first pole 111a and the second pole 111b are located between the two recesses 112. In this case, the electronic components of the protective plate module 2 can be installed at corresponding positions on the substrate such that each electronic component is located within the two recesses 112.

[0048] In some other embodiments, the electrode 111 may include a first electrode 111a and a second electrode 111b, and there may be multiple recesses 112, with at least one of the first electrode 111a and the second electrode 111b being located within a recess 112, and at least a portion of the structure of the protective plate module 2 located within a recess 112 where the electrode 111 is not located. For example, the first electrode 111a may be located within a recess 112 and the second electrode 111b may be located outside the recess 112, or the second electrode 111b may be located within a recess 112 and the first electrode 111a may be located outside the recess 112, or the first electrode 111a and the second electrode 111b may be located within different recesses 112. The electronic components of the protective plate module 2 may be located within other recesses 112 where the electrode 111 is not located. This allows for a variety of structural configurations for the battery 100, while keeping the overall structure simple and easy to manufacture.

[0049] In one specific example, the case 11 is a metal component. For example, the case 11 may be a steel case or an aluminum alloy case. Thus, the case 11 has high structural strength and can better protect the internal bare cells 12. Furthermore, the case in this embodiment effectively improves the strength of the battery and its resistance to puncture by sharp objects, ensuring that the battery is adequately protected even under extreme conditions and significantly reducing safety risks. In addition, the battery of this disclosure solves the problem of insufficient protection of conventional batteries, and compared to conventional pouch-type pack technology, this disclosure has superior technical advantages in terms of structural strength and protection.

[0050] In one specific example, the thickness of case 11 is 0.05 mm to 0.15 mm.

[0051] In another specific example, the tensile modulus of the alloy steel used in case 11 can reach 193 GPa, and / or the tensile strength of the alloy steel can reach 580 MPa. Case 11 having such performance has good elasticity and impact resistance. Compared to conventional aluminum-plastic film package cases, case 11 of this disclosure has better elasticity and toughness, and higher mechanical strength, so that cell 1 is not damaged even when subjected to large external forces.

[0052] In one specific example, the insulating spacer 3 is made of polyester resin, which in this way can more reliably prevent accidental contact and short circuits between the protective plate module 2 and the cell 1.

[0053] In some embodiments, as shown in Figures 1, 3, 5-8, 10, and 12, the protective plate module 2 may further include electrical connection terminals 22 for connecting external circuits, one end of which may be connected to the module body 21, and the other end of which may extend away from the cell 1. Selectively, the electrical connection terminals 22 may extend along a straight line, or along a broken line or curve, thereby ensuring that the electrical connection terminals 22 have sufficient connection length and do not occupy a large amount of space.

[0054] Selectively, the battery 100 may further include an injection-molded member 4. The injection-molded member 4 seals the end of the cell 1 on which the protective plate module 2 is installed and covers the portion of the protective plate module 2 other than the electrical connection terminals 22, the electrical connection terminals 22 extending to the outside of the injection-molded member 4 for connection to an external circuit. For example, the injection-molded member 4 may be formed by casting an injection molding material into the end of the cell 1 on which the protective plate module 2 is installed, in which case the injection-molded member 4 covers the end of the cell 1 on which the protective plate module 2 is installed to better protect the electrodes 111 and the protective plate module 2, and exposes the electrical connection terminals 22 to facilitate the transport of current from the electrical connection terminals 22 to the outside.

[0055] Selectively, the injection-molded member 4 may further fill the gap between the protective plate module 2 and the recess 112. In this way, the protective plate module 2 can be more securely fixed to the recess 112 of the cell 1, which is advantageous in improving the reliability of the operation of the battery 100.

[0056] Selectively, the width of the injection-molded member 4 is less than or equal to the width of the case 11, thereby fixing the protective plate module 2 while reducing the overall space occupied by the battery 100.

[0057] According to some embodiments of the present disclosure, as shown in Figure 1, the battery 100 may further include an electrode connect sheet 5. The electrode connect sheet 5 is installed inside the case 11 and connects to the tabs 121 of the bare cell 12 and the electrodes 111 in the case 11, respectively. For example, in order to reduce the length of the case 11 and reduce the overall space occupied by the battery 100, the electrodes 111 and tabs 121 may be offset from each other horizontally, in which case the offset electrodes 111 and tabs 121 can be connected by the electrode connect sheet 5. For example, the electrode connect sheet 5 includes a first electrode connect sheet 5a and a second electrode connect sheet 5b, and the first electrode connect sheet 5 a One aspect is First pole tab 121a (For example, positive terminal B ) may be connected to one end away from the bare cell 12 main body, and the first pole connection sheet 5 a The other end may be connected to the end facing the bare cell 12 of the first pole, and the second pole connect sheet 5 b One aspect is Second pole tab 121b (Negative pole B ) may be connected to one end away from the bare cell 12 main body, and the second pole connect sheet 5 b The other end may be connected to the end facing the bare cell 12 of the second pole. In this way, cell 1 is connected to the protective plate module 2 via the first pole connect sheet 5a and the second pole connect sheet 5b to form a complete circuit, while also reducing the overall space occupied by the battery 100.

[0058] The following describes the battery 100 in each embodiment with reference to Figures 1 to 12.

[0059] [Example 1] As shown in Figures 1 to 3, the battery 100 of this embodiment includes a cell 1, a protective plate module 2, an insulating spacer 3, an injection-molded member 4, and an electrode connect sheet 5.

[0060] Cell 1 includes a bare cell 12 and a case 11. The bare cell 12 has a tab 121. The case 11 is a steel case and covers the bare cell 12. The recess 112 and the electrode 111 are both located at one end in the longitudinal direction of the case 11. The electrode 111 and the tab 121 are electrically connected inside the case 11. The electrode 111 includes a first electrode 111a and a second electrode 111b, the first electrode 111a and the second electrode 111b are spaced apart along the width direction of cell 1, the recess 112 is located between the first electrode 111a and the second electrode 111b, the recess 112 is formed by the end face of the case 11 being recessed inward, and the recess 112 penetrates the end face of cell 1 along the thickness direction of cell 1.

[0061] The protective plate module 2 includes a module body 21, an electrode connection plate 23, and electrical connection terminals 22. Here, the module body 21 is located within the recess 112 and makes full use of the space of the recess 112, and the electrode connection plate 23 has one end connected to the module body 21 and the other end extending above the electrode 111 and electrically connected to the electrode 111. The protective plate module 2 and the cell 1 are separated by an insulating spacer 3, and the protective plate module 2 and the electrode 111 of the cell 1 are electrically connected by an electrode connect sheet 5.

[0062] The injection-molded member 4 seals one end of the cell 1 where the electrodes 111 are installed and covers the portion of the protective plate module 2 other than the electrical connection terminals 22, the electrical connection terminals 22 extend to the outside of the injection-molded member 4 in order to transport current to the outside.

[0063] [Example 2] As shown in Figures 9 and 10, the battery 100 of this embodiment includes a cell 1, a protective plate module 2, an insulating spacer 3, an injection-molded member 4, and an electrode connect sheet 5.

[0064] Cell 1 includes a bare cell 12 and a case 11. The bare cell 12 has tabs 121. The case 11 is a steel case and covers the bare cell 12. The recess 112 and the electrode 111 are both located at the electrode end of the case 11. The electrode 111 and the tabs 121 are electrically connected inside the case 11. The electrode 111 includes a first electrode 111a and a second electrode 111b, the first electrode 111a and the second electrode 111b are spaced apart along the width direction of cell 1, the recess 112 and the electrode 111 are spaced apart along the thickness direction of cell 1, and the recess 112 completely penetrates the end face of cell 1 along the width direction of cell 1.

[0065] The protective plate module 2 includes a module body 21, an electrode connection plate 23, and electrical connection terminals 22. The module body 21 is located within the recess 112 and makes full use of the space of the recess 112. One end of the electrode connection plate 23 is connected to the module body 21, and the other end extends above the electrode 111 and is electrically connected to the electrode 111. The protective plate module 2 and the cell 1 are separated by an insulating spacer 3, and the protective plate module 2 and the electrode 111 of the cell 1 are electrically connected by an electrode connect sheet 5.

[0066] The injection-molded member 4 seals one end of the cell 1 where the electrodes 111 are installed and covers the portion of the protective plate module 2 other than the electrical connection terminals 22, the electrical connection terminals 22 extend to the outside of the injection-molded member 4 in order to transport current to the outside.

[0067] [Example 3] As shown in Figures 4 to 8, the battery 100 of this embodiment includes a cell 1, a protective plate module 2, an insulating spacer 3, an injection-molded member 4, and an electrode connect sheet 5.

[0068] Cell 1 includes a bare cell 12 and a case 11. The bare cell 12 has tabs 121, and the case 11 is a steel case. The case 11 covers the bare cell 12. Both the recess 112 and the electrode 111 are located at the electrode end of the case 11. The electrode 111 and the tabs 121 are electrically connected inside the case 11. The electrode 111 includes a first electrode 111a and a second electrode 111b, which are spaced apart along the width direction of cell 1. The recess 112 and the electrode 111 are spaced apart along the thickness direction of cell 1, and the recess 112 may be formed only by a portion of one side edge of the end face of cell 1 in the thickness direction being recessed inward.

[0069] The protective plate module 2 includes a module body 21, an electrode connection plate 23, and electrical connection terminals 22. The module body 21 is located within the recess 112 and makes full use of the space of the recess 112. One end of the electrode connection plate 23 is connected to the module body 21, and the other end extends above the electrode 111 and is electrically connected to the electrode 111. The protective plate module 2 and the cell 1 are separated by an insulating spacer 3, and the protective plate module 2 and the electrode 111 of the cell 1 are electrically connected by an electrode connect sheet 5.

[0070] The injection-molded member 4 seals one end of the cell 1 where the electrodes 111 are installed and covers the portion of the protective plate module 2 other than the electrical connection terminals 22, the electrical connection terminals 22 extend to the outside of the injection-molded member 4 in order to transport current to the outside.

[0071] [Example 4] As shown in Figures 11 and 12, the battery 100 of this embodiment includes a cell 1, a protective plate module 2, an insulating spacer 3, an injection-molded member 4, and an electrode connect sheet 5.

[0072] Cell 1 includes a bare cell 12 and a case 11. The bare cell 12 has tabs 121. The case 11 is a steel case and covers the bare cell 12. The recesses 112 and electrodes 111 are both located at the electrode ends of the case 11. The electrodes 111 and tabs 121 are electrically connected inside the case 11. The electrodes 111 include a first electrode 111a and a second electrode 111b, which are spaced apart along the width direction of cell 1. Two recesses 112 are provided, each located at both ends of the end face of cell 1 along the width direction of cell 1, with the first electrode 111a and the second electrode 111b both located between the two recesses 112.

[0073] The protective plate module 2 includes a module body 21, an electrode connection plate 23, and electrical connection terminals 22. The module body 21 is located within the recess 112 and makes full use of the space of the recess 112. One end of the electrode connection plate 23 is connected to the module body 21, and the other end extends above the electrode 111 and is electrically connected to the electrode 111. The protective plate module 2 and the cell 1 are separated by an insulating spacer 3, and the protective plate module 2 and the electrode 111 of the cell 1 are electrically connected by an electrode connect sheet 5.

[0074] The injection-molded member 4 seals one end of the cell 1 where the electrodes 111 are installed and covers the portion of the protective plate module 2 other than the electrical connection terminals 22, the electrical connection terminals 22 extend to the outside of the injection-molded member 4 in order to transport current to the outside.

[0075] According to some other embodiments of the present disclosure, as shown in Figures 13 to 15, a battery comprises at least two cells 1, each cell 1 comprising a bare cell 12 and a case 11 covering the outer periphery of the bare cell 12. The battery may further include protective plate modules corresponding to each cell, each protective plate module may include a protective member 114 attached to the end face of one end of the case 11, the protective member 114 having a detection end 1141 which is directed toward the bare cell 12. Here, the cells 1 are used to store electrical energy. The number of cells 1 is determined based on the nominal voltage and current required for the battery. The present disclosure attaches the protective member to the end face of one end of the cell and directs the detection end toward the bare cell. Because the detection end is directly directed toward the bare cell, the heat generation of the bare cell can be directly detected, increasing detection accuracy, improving the reliability and safety of the product's operation, and reducing risk.

[0076] In one embodiment, the battery includes a circuit board assembly 15 that controls the charging and discharging of cell 1. The circuit board assembly 15 has a connector 154 that is simultaneously connected to multiple cells 1. The circuit board assembly 15 is used to control the charging and discharging of cell 1, and the connector 154 is connected to an external port and used to charge and discharge the battery.

[0077] In another embodiment, as shown in Figure 15, the case 11 includes a bottom case 1121 having an opening and a cover plate 1122 covering the opening of the bottom case 1121, and the bare cell 12 is housed in the space defined by the bottom case 1121 and the cover plate 1122. This allows the case 11 to seal and protect the positive and negative electrode plates and electrolyte of the bare cell 12. Furthermore, the case 11 has a penetration prevention function, which can save space occupied by the battery and particularly improve the volume occupancy of the cell 1.

[0078] The bare cell 12 may be formed by winding or laminating electrode plates, and the electrode plates include a positive electrode plate and a negative electrode plate, with a separator placed between the positive electrode plate and the negative electrode plate to prevent direct connection between them. The bare cell 12 achieves chemical storage by winding or laminating the positive electrode plate and the negative electrode plate and combining them.

[0079] As shown in Figures 13 and 14, the circuit board assembly 15 includes a circuit board 155 and a control circuit 153 installed on the circuit board 155, and further includes a pair of first nickel blocks 151 and second nickel blocks 152. The first nickel block 151 and the second nickel block 152 are such that one is in cell 1 positive electrode One end is connected to the other, and the other end is connected to the negative terminal of cell 1.

[0080] In one embodiment, as shown in Figures 13 and 14, the battery includes multiple cells 1, and each cell 1 is one First pole tab 121a and one Second pole tab 121b The circuit board 155 is fitted with a first nickel block 151, which has the same number as cell 1, and a second nickel block 152, which has the same number as cell 1. First pole tab 121a It is connected to the corresponding first nickel block 151, and each Second pole tab 121b It is connected to the corresponding second nickel block 152. First pole tab 121a and Second pole tab 121b In this configuration, one end is the positive electrode and the other is the negative electrode.

[0081] In another embodiment, as shown in Figures 15-16, the bare cell 12 comprises a main body 1111 and an outward-extending portion from one end of the main body 1111. First pole tab 121a and Second pole tab 121b Including that, Case 11 is, First pole tab 121a and Second pole tab 121bBetween them, the protective member 114 is recessed toward the main body 1111 to form a recess 112. Here, the protective member 114 is positioned within the recess 112 such that the detection end 1141 is directed toward the main body 1111. In this way, the detection end 1141 is directly directed toward the main body 1111 and can directly detect the heat generation status of the main body 1111, thereby improving detection accuracy.

[0082] Specifically, the recess 112 is First pole tab 121a from Second pole tab 121b The protective member 114 includes a bottom wall 1131 extending in the direction toward the main body 1111, and is positioned within the recess 112 such that the sensing end 1141 is directed toward the bottom wall 1131. By directing the sensing end 1141 toward the bottom wall 1131, the sensing end 1141 is directed toward the main body 1111. By positioning the protective member 114 in this manner, First pole tab 121a and Second pole tab 121b By making full use of the gap between them, the space occupied by cell 1 can be saved and the volume occupancy rate of cell 1 can be improved. In addition, since the detection end 1141 is directed toward the bottom wall 1131, the detection end 1141 can be in close contact with the case 11 of cell 1, contributing to improved detection accuracy. For specific settings, please refer to Figures 15 and 16.

[0083] Furthermore, in this disclosure, First pole tab 121a , Second pole tab 121b These are drawn from different plates in the bare cell 12. When the bare cell 12 is formed by winding, First pole tab 121a , Second pole tab 121b Each of these is a single layer, and when the bare cell 12 is formed by stacking, First pole tab 121a , Second pole tab 121b All of these are multilayer conjugates.

[0084] In this disclosure, the protective member 114 includes a TCO. The TCO is a thermal cut-off protective member and is an overcurrent protection device. If the battery is operating abnormally, for example in the case of overcharging, and the temperature rises above the set temperature, the TCO shuts off the charging circuit to prevent further charging of the battery, thereby ensuring that the battery is in a safe state.

[0085] In another embodiment, the recess 112 is First pole tab 121a from Second pole tab 121b The dimension in the direction is 3 to 20 mm, and this direction is typically the width direction of cell 1.

[0086] In another embodiment, the recess 112 is First pole tab 121a The length of the length in the longitudinal extension direction is 2 to 5 mm. First pole tab 121a The longitudinal extension direction is typically the longitudinal direction of cell 1.

[0087] Specifically, as shown in Figures 15 and 16, the recess 112 may be installed as a through groove that opens throughout the thickness direction of cell 1. That is, there is a first cut at the end of the bottom wall of the bottom case 1121, and a second cut in the cover plate 1122 corresponding to the first cut, and the recess 112 is recessed from the side wall of the bottom case 1121 toward the interior of the case 11 until it abuts against the respective edges of the first and second cuts. Here, the side wall and bottom wall of the bottom case 1121 may be integrally molded, or partially welded. For example, the side wall of the bottom case 1121 may be welded at the position where it is recessed toward the interior of the case 11 and abuts against the first cut. The side wall and bottom wall of the bottom case 1121 may be molded as separate structures and then welded together.

[0088] In another embodiment, as shown in Figure 15, the protective member 114 includes a first connection terminal 1142 and a second connection terminal 1143, where the first connection terminal 1142 is First pole tab 121a The second connection terminal 1143 is located in close proximity to the second connection terminal 1143. First pole tab 121a Moving away from, the first connection terminal 1142 First pole tab 121a The second connection terminal 1143 is connected to the circuit board assembly 15. In this way, the protective member 114 First pole tab 121a It is connected in series between and the circuit board assembly 15, and in the event of an overcurrent, the protective member 114 First pole tab 121a When the connection between the battery and the circuit board assembly 15 is interrupted, the charging circuit is interrupted, preventing the battery from continuing to charge and ensuring that the battery remains in a safe state.

[0089] In other embodiments, as shown in Figures 15 and 16, cell 1 includes a first connect section 115 located outside the case 11. First pole tab 121a It is electrically connected to the first connect unit 115, First pole tab 121a Between this and case 11, First pole tab 121a An insulating member is installed to insulate it from case 11. First pole tab 121a The first connector is electrically connected to the first connection terminal 1142 via the first connector 115. Here, the first connector 115 is a conductor and serves as a connecting medium between the bare cell 12 and the outside. An insulating member is installed at the connection point between the first connector 115 and the case 11 so that the case 11 and the internal electrode plates of the cell 1 are insulated from each other.

[0090] In other embodiments, as shown in Figures 15, 16, and 18, cell 1 includes a first metal plate 116 connecting the protective member 114 and the first connect portion 115, the first metal plate 116 being used to conduct electric current, and commonly used metals include nickel, copper, and aluminum.

[0091] In another embodiment, Figure 18 As shown, the first metal plate 116 includes a first flat plate portion 1161 and a second flat plate portion 1162 that are distributed in a stepped manner, and in the assembled state, First pole tab 121a In the longitudinal extension direction, the first flat plate portion 1161 is located between the second flat plate portion 1162 and the main body 1111, the first flat plate portion 1161 is connected to the protective member 114, and the second flat plate portion 1162 is connected to the first connect portion 115, First pole tab 121a Electrically connected to the first metal plate 116. Since the protective member 114 is located within the recess 112, the first connection terminal 1142 and the second connection terminal 1143 are also located within the recess 112. By arranging the first flat plate portion 1161 and the second flat plate portion 1162 in a stepped manner, the first metal plate 116 is more suitable for the mounting environment, ensuring a secure connection between the first metal plate 116 and the first connect portion 115 and the protective member 114, and allowing for a more compact structure.

[0092] In another embodiment, as shown in Figures 15 to 17, cell 1 includes a second metal plate 117 connecting a protective member 114 and a circuit board assembly 15, the second metal plate 117 including a first connecting ear 1171 connected to a second connecting terminal 1143 and a plate-shaped body 1172. The plate-shaped body 1172 is bent at one end of the first connecting ear 1171 away from the first connecting terminal 1142, and extends toward the first connecting terminal 1142 via the side of the protective member 114 that is away from the sensing end 1141, and the other end of the plate-shaped body 1172 away from the second connecting terminal 1143 is connected to the circuit board assembly 15. The protective member 114 is First pole tab 121a It is connected in series between and the circuit board assembly 15, and the protective member 114 is First pole tab 121a and Second pole tab 121b Since it is positioned within the recess 112 located between them, the second metal plate 117 can be adapted to the above mounting environment by being installed in a bent shape.

[0093] Furthermore, as shown in Figures 15 and 17, a second connecting ear 1173 is provided at one end of the plate-shaped body 1172 away from the second connecting terminal 1143, and the plate-shaped body 1172 is connected to the circuit board assembly 15 via the second connecting ear 1173. The second metal plate 117 is used to conduct electric current, and metals such as nickel, copper, and aluminum are commonly used.

[0094] In another embodiment, as shown in Figures 15 and 17, the second connecting ear 1173 is perpendicular to the plate-shaped body 1172. The second connecting ear 1173 is connected to the first nickel block 151 in the circuit board assembly 15.

[0095] In another embodiment, as shown in Figures 14 and 15, cell 1 is Second pole tab 121b It includes a second connect unit 118 that connects to the second connect unit 118. Second pole tab 121b It includes a first conductor 1181 connected to the circuit board assembly 15, and a second conductor 1182 connected to the first conductor 1181, the second conductor 1182 being connected to the circuit board assembly 15.

[0096] The first conductor 1181 is a connecting medium between the bare cell 12 and the outside, and this connecting medium includes a metal conductor. The first conductor 1181 is inside the case 11 Second pole tab 121b It is connected to the case 11, and insulating material is installed at the connection point with the case 11 to insulate the case 11 from the internal electrode plates of the bare cell 12. Here, the first conductor 1181 is usually a metal such as nickel, copper, or aluminum. As shown in Figures 14 and 15, the first conductor 1181 is connected to the second nickel block 152 in the circuit board assembly 15 via the second conductor 1182.

[0097] Second pole tab 121b The first conductor 1181, the second conductor 1182, and the second nickel block 152 can be mechanically and electrically connected by laser welding, resistance welding, or soldering to realize the battery's energy storage and charge / discharge management functions.

[0098] In another embodiment, as shown in Figures 13 and 14, the battery has a circuit board assembly 15 and an even number of cells 1, the even number of cells 1 being distributed symmetrically along the circuit board assembly 15.

[0099] Specifically, as shown in Figures 14, 15, and 17, the battery includes four cells 1, of which two cells 1 are located on one side of the circuit board assembly 15, and the other two cells 1 are located on the other opposing side of the circuit board assembly 15.

[0100] The circuit board assembly 15 includes a control circuit 153 and a circuit board 155 that supports the control circuit 153, and the cells 1 are distributed on both sides of the circuit board assembly 15.

[0101] Furthermore, the cover plate 1122 of case 11 is parallel to the circuit board 155.

[0102] Continuing to refer to Figures 14, 15, and 17, the circuit board 155 is installed parallel to the cover plate 1122, and in this embodiment, the circuit board 155 and the cell 1 are installed parallel to each other in two opposing planes in the thickness direction. In the installed state, the second connecting ears 1173 are parallel to the circuit board 155 and distributed on the circuit board 155. Nickel block 151 It is welded to the first conductor 1181, and one end of the second conductor 1182 that is away from the first conductor 1181 is also parallel to the circuit board 155 and distributed on the circuit board 155 Nickel block 152 (second block) They are welded to it. Similarly, several other cells 1 are also connected to the circuit board assembly 15 in this manner to form a flat battery core unit 101 that is applied to devices such as electronic equipment and used to realize the battery's energy storage and charge / discharge management functions.

[0103] In another embodiment, as shown in Figure 13, the battery includes an insulating fastening unit 200 that simultaneously covers the circuit board assembly 15 and the cell 1. The insulating fastening unit 200 provides external mounting protection for the battery core unit 101, which consists of the circuit board assembly 15 and the cell 1.

[0104] In another embodiment, as shown in Figures 19 and 20, the insulating fastening unit 200 includes an insulating film 220, the insulating film 220 includes an insulating film substrate layer 221, and the insulating film substrate layer 221 is bonded to the cell 1 and / or circuit board assembly 15 via an insulating film adhesive layer 222. Here, the insulating film 220 is mainly used for insulation, printing marks, etc. The insulating film substrate 221 may include one or more of polyethylene terephthalate (PET). The insulating film adhesive layer 222 may be formed by applying an insulating adhesive.

[0105] In another embodiment, as shown in Figure 21, the insulating film 220 includes an insulating film thermal conductive layer 223 covering the insulating film substrate layer 221, and the insulating film 220 includes a plurality of insulating film adhesive layers 222, one of which is distributed between the insulating film thermal conductive layer 223 and the insulating film substrate layer 221 to fix the insulating film thermal conductive layer 223 to the insulating film substrate layer 221. The insulating film thermal conductive layer 223 is used for heat distribution and heat dissipation. In other words, in addition to the role of heat dissipation, if the battery generates heat locally, the insulating film thermal conductive layer 223 conducts the heat from that part to other parts of the battery to prevent localized overheating and protect the battery. Here, the insulating film thermal conductive layer 223 may include one or more of graphite, copper foil, and aluminum foil.

[0106] In another embodiment, the thickness of the insulating film thermal conductive layer 223 can be 0.03 to 0.25 mm.

[0107] In another embodiment, the insulating fastening unit 200 further includes a plastic fixing bracket 210 which is installed between the insulating film 220 and cell 1 and / or between the insulating film 220 and circuit board assembly 15. fixed Bracket 210 is used to form the outer contour of the battery. Plastic fixed The specific position and thickness of bracket 210 are determined according to the external shape requirements. In other words, plastic fixed The bracket 210 may completely cover the case 11, or it may partially cover the case 11, and it may have the same thickness or different thicknesses.

[0108] The following describes an electronic device relating to an embodiment of the second aspect of this disclosure.

[0109] Specifically, the electronic device in the embodiment of this disclosure may be an electronic device such as a tablet computer or a mobile phone, and of course, it may be any other electronic device that requires a battery function. The electronic device may include the device body and the battery 100 in the above embodiment. The device body may be equipped with a battery housing, and the battery 100 may be installed in the battery housing, and the battery 100 is electrically connected to the device body to supply power to the device body.

[0110] According to the electronic device of the embodiment of this disclosure, by installing the battery 100 in the above embodiment, the volume of the battery housing can be saved, the space utilization rate can be improved, and the miniaturization of the electronic device can be contributed to.

[0111] In this disclosure, unless otherwise specified, terms such as “attachment,” “connection,” “linking,” and “fixing” should be understood in a broad sense. For example, a connection may be fixed, detachable, or integral. A connection may be mechanical, electrical, or communication. A connection may be direct, indirect through an intermediate medium, or internal communication between two elements or an interaction relationship between two elements. Those skilled in the art will understand the specific meaning of these terms in this disclosure depending on the specific circumstances.

[0112] In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “example,” “specific example,” or “several examples” means that the specific configuration, structure, material, or feature described in relation to that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, a schematic description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific configuration, structure, material, or feature described may be combined in an appropriate manner in any one or more embodiments or examples. Furthermore, a person skilled in the art can combine or combine different embodiments or examples, as well as configurations relating to different embodiments or examples, as described herein, provided that they do not conflict with each other.

[0113] Finally, the above embodiments are intended solely to illustrate, and not to limit, the technical solutions of the Disclosure. Despite the detailed description of the Disclosure with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or substitute some or all of the technical configurations therein for equivalent purposes. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the respective embodiments of the Disclosure.

Claims

1. A battery comprising a cell, a protective plate module, and an insulating spacer, The cell comprises a bare cell and a case, the bare cell having tabs, the case covering the bare cell, recesses and electrodes provided at the electrode ends of the case, and the electrodes being electrically connected to the tabs. The protective plate module has at least a portion of its structure fitted into the recess, and the protective plate module is electrically connected to the electrode. The insulating spacer is installed between the cell and the protective plate module, separating the cell and the protective plate module. At least a portion of the structure of the insulating spacer is located within the recess, A battery characterized by the following features.

2. The recess and the electrode are offset horizontally, the protective plate module includes a module body and an electrode connecting plate, the module body is located within the recess, and the electrode connecting plate has one end connected to the module body and the other end extending above the electrode and electrically connected to the electrode. The battery according to feature 1.

3. The module body includes a substrate and electronic components, the electronic components being installed on the side of the substrate facing the cell and located within the recess, The battery according to feature 2.

4. The electrode includes a first electrode and a second electrode. The recess is located between the first pole and the second pole, and the recess penetrates the end face of the cell along the thickness direction of the cell, or The recess is located on one side of the electrode in the thickness direction of the cell, and the recess is formed by recessing at least a portion of the edge on one side of the end face in the thickness direction of the cell, or Two recesses are provided, each of which is located at both ends of the end face in the width direction of the cell, and both the first pole and the second pole are located between the two recesses. The battery according to feature 2.

5. The electrode includes a first electrode and a second electrode, and a plurality of recesses are provided, with at least one of the first electrode and the second electrode being placed within the recess. The battery according to feature 1.

6. At least a portion of the structure of the protective plate module is located in the recess where the electrodes are not installed. The battery according to feature 5.

7. The battery further includes an injection-molded member, the injection-molded member is installed at the electrode end of the case, and the injection-molded member seals the protective plate module. The electrical connection terminals of the protective plate module for connecting to an external circuit extend to the outside of the injection-molded member. The battery according to any one of claims 1 to 6.

8. The injection-molded member fills the gap between the protective plate module and the recess. The battery according to feature 7.

9. The width of the injection-molded member is less than or equal to the width of the case. The battery according to feature 7.

10. The battery further includes electrode connect sheets connected to the tab and the electrodes, respectively. The battery according to any one of claims 1 to 6.

11. The protective plate module includes a protective member having a sensing end, the protective member being attached to the end face of one end of the case such that the sensing end is directed toward the bare cell. The battery according to feature 1.

12. The aforementioned tab includes a first pole tab and a second pole tab, The recess has a dimension of 3 to 20 mm in the direction from the first pole tab to the second pole tab, and / or the recess has a dimension of 2 to 5 mm in the longitudinal extension direction of the first pole tab. The battery according to feature 11.

13. The aforementioned tab includes a first pole tab and a second pole tab, The protective member includes a first connection terminal and a second connection terminal, the first connection terminal being connected to the first pole tab and the second connection terminal being connected to the circuit board assembly. The battery according to feature 11.

14. The cell includes a first connector located outside the case, the first electrode tab is electrically connected to the first connector, and the first electrode tab is electrically connected to the first connection terminal via the first connector. The battery according to feature 13.

15. The cell includes a first metal plate, the first metal plate connects the protective member and the first connect portion, the first metal plate includes a first flat plate portion and a second flat plate portion distributed in a stepped manner, the first flat plate portion is located between the second flat plate portion and the bare cell body, The first flat plate portion is connected to the protective member, and the second flat plate portion is connected to the first connect portion. The battery according to feature 14.

16. The cell includes a second metal plate, the second metal plate connecting the protective member and the circuit board assembly, the second metal plate includes a first connecting ear connected to the second connecting terminal and a plate-shaped body, the plate-shaped body having one end away from the second connecting terminal connected to the circuit board assembly. The battery according to feature 14.

17. A second connecting ear is provided at one end of the plate-shaped body that is away from the second connecting terminal, and the plate-shaped body is connected to the circuit board assembly via the second connecting ear. The battery according to feature 16.

18. The battery further includes a circuit board assembly, the cell includes at least two cells, the at least two cells are distributed symmetrically along the circuit board assembly, The circuit board assembly includes a control circuit and a circuit board supporting the control circuit, and the at least two cells are distributed on both sides of the circuit board assembly. The battery according to any one of claims 11 to 17.

19. The battery includes an insulating fastening unit that covers the cell and the circuit board assembly, The insulating fastening unit includes an insulating film, the insulating film includes an insulating film substrate layer and an insulating film adhesive layer, the insulating film substrate layer is bonded to the cell and / or the circuit board assembly via the insulating film adhesive layer, The insulating film further includes an insulating film thermal conductive layer covering the insulating film substrate layer, the insulating film includes a plurality of insulating film adhesive layers, one of the plurality of insulating film adhesive layers is distributed between the insulating film thermal conductive layer and the insulating film substrate layer. The battery according to feature 18.

20. The insulating fastening unit further includes adhesive fixing brackets installed between the insulating film and the circuit board assembly and / or between the insulating film and the cell. The battery according to feature 19.

21. It is an electronic device, The device body has a battery compartment, A battery according to any one of claims 1 to 6, which is installed in the battery housing and electrically connected to the main body of the device, is included. An electronic device characterized by the following features.

Images