Battery and Electronic Device

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. Since the battery has a high space utilization rate, 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 installed 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 installing 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] Optionally, the recess and the electrode are horizontally offset. The protective plate module includes a module body and an electrode connection plate. The module body is located within the recess, and one end of the electrode connection plate is connected to the module body, while the other end extends above the electrode and is electrically connected to the electrode.

[0008] According to some embodiments of the present disclosure, the module body includes a substrate and electronic components. The electronic components are installed on the substrate and located within the recess.

[0009] In some embodiments, the electrode includes a first electrode and a second electrode. The recess is located between the first electrode and the second electrode and penetrates the end face of the cell along the thickness direction of the cell. Alternatively, the recess is located on one side of the electrode along the thickness direction of the cell, and at least a part of the edge on one side of the end face along the thickness direction is recessed to form the recess. Alternatively, two recesses are installed, and the two recesses are respectively located at both ends of the end face along the width direction of the cell, and both the first electrode and the second electrode are located between the two recesses.

[0010] In some other embodiments, the electrode includes a first electrode and a second electrode, a plurality of recesses are installed, and at least one of the first electrode and the second electrode is installed within the recess.

[0011] Optionally, at least a part of the structure of the protective plate module is located within the recess where the electrode is not installed.

[0012] Optionally, at least a part of the structure of the insulating spacer is located within the recess.

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

[0014] Optionally, the battery further includes an injection molding member. The injection molding member is installed at the electrode end of the case. The injection molding member seals the protective plate module, and the electrical connection terminals extend outside the injection molding member.

[0015] Optionally, the injection-molded member is suitable for filling the gap between the protection plate module and the recess.

[0016] Optionally, the width of the injection-molded member 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 connection sheet connected to the tab and the electrode, respectively.

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

[0019] In some embodiments, the protection plate module includes a protection member having a detection end, and the protection member is attached to an end face of one end of the case such that the detection end faces the bare cell.

[0020] Optionally, the tab includes a first pole tab and a second pole tab.

[0021] In one specific example, 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.

[0022] Optionally, the protection member includes a first connection terminal and a second connection terminal, the first connection terminal is connected to the first pole tab, and the second connection terminal is connected to the circuit board assembly.

[0023] Optionally, the cell includes a first connection portion installed outside the case, the first pole tab is electrically connected to the first connection portion, and the first pole tab is electrically connected to the first connection terminal via the first connection portion.

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

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

[0033] The second aspect of the present disclosure further provides an electronic device. The electronic device includes a device body having a battery accommodation chamber and a battery according to the first aspect of the present disclosure. The battery is installed in the battery accommodation chamber and electrically connected to the device body.

[0034] According to the electronic device of the present disclosure, by installing the battery of the above first aspect, the volume of the accommodation chamber can be saved, the space utilization rate can be improved, and it contributes to the miniaturization of the electronic device.

Brief Description of the Drawings

[0035] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings required for the description of the embodiments or the prior art will be briefly introduced below. Needless to say, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings based on these drawings without creative labor.

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Embodiments for Carrying Out the Invention

[0036] Hereinafter, embodiments of the present disclosure will be described in detail. 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. Hereinafter, the embodiments described with reference to the drawings are exemplary only and are merely for interpreting the present disclosure and should not be understood as limiting the present disclosure.

[0037] Hereinafter, with reference to FIGS. 1 to 12, the battery 100 according to the embodiment of the present disclosure will be described.

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

[0039] Specifically, the cell 1 may include a bare cell 12 and a case 11. The bare cell 12 has tabs 121, the case 11 covers the bare cell 12, and the case 11 can protect the bare cell 12 to improve the safety of the battery 100. A recess 112 and an electrode 111 are installed at the electrode end of the case 11. The electrode 111 and the tab 121 are electrically connected inside the case 11. The tab may include a first pole tab (for example, the positive electrode tab 121) and a second pole tab (for example, the negative electrode tab 121). For example, the recess 112 may be recessed inward along the longitudinal direction of the cell 1. The electrode 111 may be installed inside the recess 112 or installed outside the recess 112 and separated from the recess 112.

[0040] At least a part of the structure of the protection plate module 2 is fitted into the recess 112, and the protection plate module 2 is electrically connected to the electrode 111. It should be noted that the protection plate module 2 and the electrode 111 are electrically connected outside the case 11. The protection plate module 2 can provide protection during the charging and discharging process of the cell 1 to avoid problems such as overcharging, over-discharging, overcurrent, short circuit, and ultra-high temperature charging and discharging. For example, the protruding part of the protection plate module 2 may be installed inside the recess 112, or the entire protection plate module 2 may be fitted into the recess 112. The insulating spacer 3 is installed between the cell 1 and the protection plate module 2 to separate the cell 1 and the protection plate module 2, thereby avoiding a short circuit between the protection plate module 2 and the cell 1.

[0041] According to the battery 100 according to the embodiment of the present disclosure, by installing the recess 112 on the end face of the electrode end of the cell 1 and installing at least a part of the protection plate module 2 inside the recess 112, the space utilization rate can be improved and the overall length of the battery 100 can be shortened. The energy density of the battery with the same size will be increased.

[0042] According to some embodiments of the present disclosure, the recess 112 and the electrode 111 may be offset in the horizontal direction. The protection plate module 2 may include a module body 21 and an electrode connection plate 23. In order to make full use of the space of the recess 112, the module body 21 is located within 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. In this way, the entire protection plate module 2 can be directly installed on the side of the electrode 111 facing away from the cell 1, avoiding the problem that the length of the battery 100 becomes longer. When the length of the battery 100 becomes longer, it is disadvantageous for reducing the occupied space of the battery 100 and improving the 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 part of the protection plate module 2. When assembling the protection plate module 2 and the cell 1, the electronic components may be fitted into the recess 112 of the cell 1, or the entire protection plate module 2 may be fitted into the recess 112. In this way, the space of the recess 112 can be fully utilized, optimizing the structural layout of the battery 100, improving the space utilization rate, 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 are arranged at intervals along the width direction of the cell 1, and both the first electrode 111a and the second electrode 111b are spaced apart from the recess 112. In this way, when installing the electronic components of the protection plate module 2 into the recess 112 of the cell 1, problems such as mutual interference and short circuit caused by accidental contact between the electrode 111 and the electronic components can be more reliably avoided.

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

[0046] Alternatively, as shown in FIGS. 4 and 5 to 8 or FIGS. 9 and 10, the recess 112 and the electrode 111 are arranged spaced apart along the thickness direction of the cell 1, and the recess 112 is formed by at least a part of one side edge in the thickness direction of the end face of the cell 1 being recessed inward. For example, as shown in FIG. 6, the recess 112 may completely penetrate the end face along one side edge in the thickness direction of the end face of the cell 1, or, for example, as shown in FIG. 4, only a part of one side edge in the thickness direction of the end face of the cell 1 may be recessed inward to form the recess 112. Needless to say, the length of the recess 112 may be reasonably determined according to the number and position of the electronic components in the protection plate module 2. In this way, the structure is simplified and the manufacturing is facilitated.

[0047] Alternatively, as shown in FIGS. 11 and 12, two recesses 112 may be provided. The two recesses 112 are respectively located at both ends in the width direction of the end face of the 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 protection plate module 2 can be installed at the corresponding positions on the substrate so that the electronic components are respectively located in the two recesses 112.

[0048] In some other embodiments, the electrode 111 may include a first pole 111a and a second pole 111b, a plurality of recesses 112 may be provided, at least one of the first pole 111a and the second pole 111b is disposed in the recess 112, and at least a part of the structure of the protection plate module 2 is located in the recess 112 where the electrode 111 is not installed. For example, the first pole 111a may be disposed in the recess 112 and the second pole 111b may be disposed outside the recess 112, or the second pole 111b may be disposed in the recess 112 and the first pole 111a may be disposed outside the recess 112, or the first pole 111a and the second pole 111b may be disposed in different recesses 112 respectively. The electronic components of the protection plate module 2 may be disposed in other recesses 112 where the electrode 111 is not installed. Thereby, the structural form of the battery 100 becomes diverse, and the overall structure is simple and easy to manufacture.

[0049] In one specific example, the case 11 is a metal member. For example, the case 11 may be a steel case or an aluminum alloy case. In this way, the case 11 has high structural strength and can better protect the internal bare cell 12. It should be noted that the case in this embodiment can effectively improve the strength of the battery and the resistance to penetration by sharp objects, ensuring that the battery is fully protected even under extreme conditions and significantly reducing the safety risk. In addition, the battery of the present disclosure solves the problem of insufficient protection of conventional batteries. Compared with the conventional pouch-type Pack technology, the present disclosure has more excellent technical advantages in terms of structural strength and protection.

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

[0051] In another specific example, the tensile elastic 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. Case 11 of the present disclosure has better elasticity and toughness, and high mechanical strength compared with the case of the conventional aluminum plastic film package, whereby the cell 1 will not be damaged even when receiving a large external force.

[0052] In one specific example, the insulating spacer 3 is a polyester resin member, and in this way, the miscontact and short circuit between the protection plate module 2 and the cell 1 can be more reliably prevented.

[0053] In some embodiments, as shown in FIGS. 1, 3, 5-8, 10 and 12, the protection plate module 2 may further include an electrical connection terminal 22 for connecting to an external circuit. One end of the electrical connection terminal 22 may be connected to the module body 21, and the other end may extend in a direction away from the cell 1. Optionally, the electrical connection terminal 22 may extend along a straight line, or may extend along a broken line or a curve, thereby ensuring that the electrical connection terminal 22 has a sufficient connection length and does not occupy a large amount of space.

[0054] Optionally, the battery 100 may further include an injection molding member 4. The injection molding member 4 seals one end of the cell 1 where the protection plate module 2 is installed, and covers the portion of the protection plate module 2 other than the electrical connection terminal 22. The electrical connection terminal 22 extends to the outside of the injection molding member 4 for connecting to an external circuit. For example, the injection molding member 4 may be formed by casting an injection molding material into one end of the cell 1 where the protection plate module 2 is installed. In this case, the injection molding member 4 covers one end of the cell 1 where the protection plate module 2 is installed to better protect the electrode 111 and the protection plate module 2, and exposes the electrical connection terminal 22 to facilitate the transport of current from the electrical connection terminal 22 to the outside.

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

[0056] Optionally, the width of the injection molding member 4 is less than or equal to the width of the case 11. In this way, while fixing the protection plate module 2, the occupied space of the entire battery 100 can be reduced.

[0057] According to some embodiments of the present disclosure, as shown in FIG. 1, the battery 100 may further include an electrode connection sheet 5. The electrode connection sheet 5 is installed inside the case 11, and the electrode connection sheet 5 is connected to the tab 121 of the bare cell 12 and the electrode 111 in the case 11 respectively. For example, in order to reduce the length of the case 11 and thus reduce the occupied space of the entire battery 100, the electrode 111 and the tab 121 may be offset from each other in the horizontal direction. In this case, the offset electrode 111 and tab 121 can be connected by the electrode connection sheet 5. For example, the electrode connection sheet 5 includes a first pole connection sheet 5a and a second pole connection sheet 5b. One end of the first pole connection sheet 5 may be connected to one end of the first pole tab 121 (for example, the positive electrode tab 121) away from the bare cell 12 body, and the other end of the first pole connection sheet 5 may be connected to one end facing the first pole bare cell 12. One end of the second pole connection sheet 5 may be connected to one end of the second pole tab 121 (for example, the negative electrode tab 121) away from the bare cell 12 body, and the other end of the second pole connection sheet 5 may be connected to one end facing the second pole bare cell 12. In this way, the cell 1 is connected to the protection plate module 2 via the first pole connection sheet 5a and the second pole connection sheet 5b to form a complete circuit, and the occupied space of the entire battery 100 can be made smaller.

[0058] Hereinafter, with reference to FIGS. 1 to 12, the battery 100 will be exemplarily described for each embodiment.

[0059] [Embodiment 1] As shown in FIGS. 1 to 3, the battery 100 of this embodiment includes a cell 1, a protection board module 2, an insulating spacer 3, an injection molding member 4, and an electrode connection sheet 5.

[0060] The 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 the case 11 covers the bare cell 12. Both the recess 112 and the electrode 111 are installed 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 pole 111a and a second pole 111b. The first pole 111a and the second pole 111b are arranged at intervals along the width direction of the cell 1. The recess 112 is located between the first pole 111a and the second pole 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 the cell 1 along the thickness direction of the cell 1.

[0061] The protection board module 2 includes a module body 21, an electrode connection plate 23, and an electrical connection terminal 22. Here, the module body 21 is located in the recess 112 to make 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 to the upper side of the electrode 111 and is electrically connected to the electrode 111. The protection board module 2 and the cell 1 are separated by the insulating spacer 3, and the protection board module 2 and the electrode 111 of the cell 1 are electrically connected by the electrode connection sheet 5.

[0062] The injection molding member 4 seals one end where the electrode 111 of the cell 1 is installed, covers the portion of the protection board module 2 other than the electrical connection terminal 22, and the electrical connection terminal 22 extends to the outside of the injection molding member 4 to transport current to the outside.

[0063] [Embodiment 2] As shown in FIGS. 9 and 10, the battery 100 of this embodiment includes a cell 1, a protection board module 2, an insulating spacer 3, an injection molding member 4, and an electrode connection sheet 5.

[0064] Cell 1 includes bare cell 12 and case 11. The bare cell 12 has tab 121. The case 11 is a steel case, and the case 11 covers the bare cell 12. Both the recess 112 and the electrode 111 are installed at the electrode end of the case 11. The electrode 111 and the tab 121 are electrically connected inside the case 11. The electrode 111 includes a first pole 111a and a second pole 111b. The first pole 111a and the second pole 111b are arranged at intervals along the width direction of the cell 1. The recess 112 and the electrode 111 are arranged at intervals along the thickness direction of the cell 1. Also, the recess 112 completely penetrates the end face of the cell 1 along the width direction of the cell 1.

[0065] The protection plate module 2 includes a module main body 21, an electrode connection plate 23, and an electrical connection terminal 22. The module main body 21 is located in the recess 112 to make full use of the space of the recess 112. One end of the electrode connection plate 23 is connected to the module main body 21, and the other end extends to the upper side of the electrode 111 and is electrically connected to the electrode 111. The protection plate module 2 and the cell 1 are separated by an insulating spacer 3, and the protection plate module 2 and the electrode 111 of the cell 1 are electrically connected by an electrode connection sheet 5.

[0066] The injection molding member 4 seals one end where the electrode 111 of the cell 1 is installed, covers the parts of the protection plate module 2 other than the electrical connection terminal 22, and the electrical connection terminal 22 extends to the outside of the injection molding member 4 to transport current to the outside.

[0067] [Example 3] As shown in FIGS. 4 to 8, the battery 100 of this embodiment includes a cell 1, a protection plate module 2, an insulating spacer 3, an injection molding member 4, and an electrode connection sheet 5.

[0068] Cell 1 includes bare cell 12 and case 11. The bare cell 12 has tab 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 installed at the electrode end of the case 11. The electrode 111 and the tab 121 are electrically connected inside the case 11. The electrode 111 includes a first pole 111a and a second pole 111b, and the first pole 111a and the second pole 111b are arranged at intervals along the width direction of the cell 1. The recess 112 and the electrode 111 are arranged at intervals along the thickness direction of the cell 1, and the recess 112 may be formed only by a part of one edge on one side in the thickness direction of the end face of the cell 1 being recessed inward.

[0069] The protection plate module 2 includes a module body 21, an electrode connection plate 23, and an electrical connection terminal 22. The module body 21 is located in 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 to the upper side of the electrode 111 and is electrically connected to the electrode 111. The protection plate module 2 and the cell 1 are separated by an insulating spacer 3, and the protection plate module 2 and the electrode 111 of the cell 1 are electrically connected by an electrode connection sheet 5.

[0070] The injection molding member 4 seals one end where the electrode 111 of the cell 1 is installed, covers the part of the protection plate module 2 other than the electrical connection terminal 22, and the electrical connection terminal 22 extends to the outside of the injection molding member 4 in order to transport current to the outside.

[0071] [Example 4] As shown in FIGS. 11 and 12, the battery 100 of this embodiment includes a cell 1, a protection plate module 2, an insulating spacer 3, an injection molding member 4, and an electrode connection 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 the case 11 covers the bare cell 12. Both a recess 112 and an electrode 111 are installed at the electrode end of the case 11. The electrode 111 and the tab 121 are electrically connected inside the case 11. The electrode 111 includes a first pole 111a and a second pole 111b, and the first pole 111a and the second pole 111b are arranged at intervals along the width direction of the cell 1. Two recesses 112 are installed, and the two recesses 112 are respectively located at both ends along the width direction of the end face of the cell 1, and both the first pole 111a and the second pole 111b are located between the two recesses 112.

[0073] The protection plate module 2 includes a module main body 21, an electrode connection plate 23, and an electrical connection terminal 22. The module main body 21 is located in the recess 112 to make full use of the space of the recess 112. One end of the electrode connection plate 23 is connected to the module main body 21, and the other end extends to the upper side of the electrode 111 and is electrically connected to the electrode 111. The protection plate module 2 and the cell 1 are separated by an insulating spacer 3, and the protection plate module 2 and the electrode 111 of the cell 1 are electrically connected by an electrode connection sheet 5.

[0074] The injection molding member 4 seals one end where the electrode 111 of the cell 1 is installed, covers the part of the protection plate module 2 other than the electrical connection terminal 22, and the electrical connection terminal 22 extends to the outside of the injection molding member 4 to transport current to the outside.

[0075] According to some other embodiments of the present disclosure, as shown in FIGS. 13 to 15, the battery includes at least two cells 1, and each cell 1 includes a bare cell 12 and a case 11 coated on the outer periphery of the bare cell 12. The battery may further include a protection plate module corresponding to each cell. The protection plate module may include a protection member 114 attached to an end face at one end of the case 11. The protection member 114 has a detection end 1141, and the detection end 1141 points to the bare cell 12. Here, the cell 1 is 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 protection member to the end face at one end of the cell and directs the detection end to the bare cell. Since the detection end directly points to the bare cell, the heat generation situation of the bare cell can be directly detected, the detection accuracy can be increased, the reliability and safety of the product operation can be improved, and the risk can be reduced.

[0076] In one embodiment, the battery includes a circuit board assembly 15 for controlling the charge and discharge of the cell 1. The circuit board assembly 15 has a connector 154 connected to a plurality of cells 1 simultaneously. The circuit board assembly 15 is used to control the charge and discharge of the 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 FIG. 15, the case 11 includes a bottom case 1121 having an opening chamber and a cover plate 1122 covering the opening of the bottom case 1121. The bare cell 12 is accommodated in a space defined by the bottom case 1121 and the cover plate 1122. Thereby, the case 11 can seal and protect the positive and negative plates and the electrolyte of the bare cell 12. In addition, the case 11 further has a function of preventing penetration, can save the occupied space of the battery, and particularly improves the volume occupancy rate of the cell 1.

[0078] The bare cell 12 may be formed by winding or laminating electrode plates. The electrode plates include a positive electrode plate and a negative electrode plate, and a separator for preventing direct connection between the positive electrode plate and the negative electrode plate is installed between the positive electrode plate and the negative electrode plate. The bare cell 12 realizes chemical storage by winding or laminating and combining the positive electrode plate and the negative electrode plate.

[0079] As shown in FIGS. 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 first nickel block 151 and a second nickel block 152 used in pairs. One of the first nickel block 151 and the second nickel block 152 is connected to the negative electrode of cell 1, and the other is connected to the negative electrode of cell 1.

[0080] In one embodiment, as shown in FIGS. 13 and 14, the battery includes a plurality of cells 1, and each cell 1 includes one first pole tab 121 and one second pole tab 121. On the circuit board 155, a first nickel block 151 having the same number as the cells 1 and a second nickel block 152 having the same number as the cells 1 are installed. Each first pole tab 121 is connected to the corresponding first nickel block 151, and each second pole tab 121 is connected to the corresponding second nickel block 152. Among them, one of the first pole tab 121 and the second pole tab 121 is the positive electrode, and the other is the negative electrode.

[0081] In another embodiment, as shown in FIGS. 15 to 16, the bare cell 12 includes a main body 1111, a first pole tab 121 and a second pole tab 121 extending outward from one end of the main body 1111. The case 11 forms a recess 112 by being recessed toward the main body 1111 between the first pole tab 121 and the second pole tab 121. Here, the protection member 114 is disposed in the recess 112 such that the detection end 1141 points to the main body 1111. In this way, since the detection end 1141 directly points to the main body 1111 and can directly detect the heat generation situation of the main body 1111, the detection accuracy can be improved.

[0082] Specifically, the recess 112 includes a bottom wall 1131 extending in the direction from the first pole tab 121 to the second pole tab 121, and the protection member 114 is disposed in the recess 112 such that the detection end 1141 faces the bottom wall 1131. By directing the detection end 1141 towards the bottom wall 1131, it is realized that the detection end 1141 faces the main body 1111. By arranging the protection member 114 in this way, the gap between the first pole tab 121 and the second pole tab 121 can be fully utilized to save the occupied space of the cell 1 and improve the volume occupancy rate of the cell 1. Further, since the detection end 1141 faces the bottom wall 1131, the detection end 1141 can be in close contact with the case 11 of the cell 1, contributing to the improvement of the detection accuracy. For specific settings, reference can be made to FIGS. 15 and 16.

[0083] In the present disclosure, the first pole tab 121 and the second pole tab 121 are drawn from different electrode plates in the bare cell 12. When the bare cell 12 is formed by winding, both the first pole tab 121 and the second pole tab 121 are single-layer, and when the bare cell 12 is formed by stacking, both the first pole tab 121 and the second pole tab 121 are multi-layer assemblies.

[0084] In the present disclosure, the protection member 114 includes a TCO. The TCO is a Thermal Cut-Off, which is an overcurrent protection device. When the battery operates abnormally, for example, in the case of overcharging, when the temperature becomes higher than the set temperature, the TCO cuts off the charging circuit so that the battery cannot be further charged, ensuring that the battery is in a safe state.

[0085] In another embodiment, the recess 112 has a dimension in the direction from the first pole tab 121 to the second pole tab 121 of 3 to 20 mm, and usually, this direction is the width direction of the cell 1.

[0086] In another embodiment, the recess 112 has a dimension in the longitudinal extension direction of the first pole tab 121 of 2 to 5 mm, and the longitudinal extension direction of the first pole tab 121 is usually the longitudinal direction of the cell 1.

[0087] Specifically, as shown in FIGS. 15 and 16, the recess 112 may be installed as a through groove that entirely opens in the thickness direction of the cell 1. That is, there is a first cut at the end of the bottom wall of the bottom case 1121, and there is a second cut corresponding to the first cut on the cover plate 1122. The recess 112 is recessed from the side wall of the bottom case 1121 toward the inside of the case 11 until it abuts against each side of the first cut and the second cut. Here, the side wall and the bottom wall of the bottom case 1121 may be integrally formed, or a part thereof may be welded. For example, welding may be performed at a position where the side wall of the bottom case 1121 is recessed toward the inside of the case 11 and abuts against the first cut. The side wall and the bottom wall of the bottom case 1121 may be formed as a separate structure and then formed by welding.

[0088] In another embodiment, as shown in FIG. 15, the protection member 114 includes a first connection terminal 1142 and a second connection terminal 1143. Here, the first connection terminal 1142 is close to the first pole tab 121, the second connection terminal 1143 is away from the first pole tab 121, the first connection terminal 1142 is connected to the first pole tab 121, and the second connection terminal 1143 is connected to the circuit board assembly 15. In this way, the protection member 114 is connected in series between the first pole tab 121 and the circuit board assembly 15. When the protection member 114 cuts off the connection between the first pole tab 121 and the circuit board assembly 15 in the event of an overcurrent, the charging circuit is cut off so that the battery cannot continue charging, ensuring that the battery is in a safe state.

[0089] In another embodiment, as shown in FIGS. 15 and 16, the cell 1 includes a first connection part 115 installed outside the case 11. The first pole tab 121 is electrically connected to the first connection part 115. An insulating member is installed between the first pole tab 121 and the case 11 to insulate the first pole tab 121 from the case 11. The first pole tab 121 is electrically connected to the first connection terminal 1142 via the first connection part 115. Here, the first connection part 115 is a conductor and is a connection medium between the bare cell 12 and the outside. An insulating member is installed at the connection location between the first connection part 115 and the case 11 so that the case 11 and the internal electrode plate of the cell 1 are insulatedly connected.

[0090] In another embodiment, as shown in FIGS. 15, 16, and 18, the cell 1 includes a first metal plate 116 that connects the protection member 114 and the first connection part 115. The first metal plate 116 is used to conduct current, and commonly used metals include nickel, copper, aluminum, etc.

[0091] In another embodiment, as shown in FIG. 17, the first metal plate 116 includes a first flat plate part 1161 and a second flat plate part 1162 that are distributed in a stepped manner. In the assembled state, in the longitudinal extension direction of the first pole tab 121, the first flat plate part 1161 is located between the second flat plate part 1162 and the main body 1111. The first flat plate part 1161 is connected to the protection member 114, and the second flat plate part 1162 is connected to the first connection part 115, thereby being electrically connected to the first pole tab 121. Since the protection member 114 is located in the recess 112, the first connection terminal 1142 and the second connection terminal 1143 are also located in the recess 112. By arranging the first flat plate part 1161 and the second flat plate part 1162 in a stepped manner, the first metal plate 116 is more suitable for the installation environment, ensuring the connection between the first metal plate 116 and the first connection part 115 and the protection member 114, and making the structure compact.

[0092] In another embodiment, as shown in FIGS. 15 to 17, the cell 1 includes a second metal plate 117 that connects the protection member 114 and the circuit board assembly 15. The second metal plate 117 includes a first connection ear 1171 connected to the second connection terminal 1143 and a plate-shaped body 1172. After being bent at one end of the first connection ear 1171 away from the first connection terminal 1142, the plate-shaped body 1172 extends toward the first connection terminal 1142 through the side facing away from the detection end 1141 of the protection member 114. One end of the plate-shaped body 1172 away from the second connection terminal 1143 is connected to the circuit board assembly 15. The protection member 114 is serially connected between the first pole tab 121 and the circuit board assembly 15, and the protection member 114 is disposed in the recess 112 located between the first pole tab 121 and the second pole tab 121. Therefore, 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 FIGS. 15 and 17, a second connection ear 1173 is provided at one end of the plate-shaped body 1172 away from the second connection terminal 1143, and the plate-shaped body 1172 is connected to the circuit board assembly 15 through the second connection ear 1173. The second metal plate 117 is used to conduct current, and metals such as nickel, copper, and aluminum are often used.

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

[0095] In another embodiment, as shown in FIGS. 14 and 15, the cell 1 includes a second connection portion 118 that connects to the second pole tab 121. The second connection portion 118 includes a first conductor 1181 connected to the second pole tab 121 and a second conductor 1182 connected to the first conductor 1181. The second conductor 1182 is connected to the circuit board assembly 15.

[0096] The first conductor 1181 is a connection medium between the bare cell 12 and the outside, and the connection medium includes a metal conductor. The first conductor 1181 is connected to the second pole tab 121 in the case 11, and an insulating material is installed at the connection location with the case 11 to insulate the inner pole plate of the case 11 and the bare cell 12. Here, the first conductor 1181 is usually a metal such as nickel, copper, or aluminum. As shown in FIGS. 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] Mechanical and electrical connections can be realized between the second pole tab 121, the first conductor 1181, the second conductor 1182, and the second nickel block 152 by laser welding process, resistance welding, or soldering, so as to realize the energy storage and charge / discharge management functions of the battery.

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

[0099] Specifically, as shown in FIGS. 14, 15, and 17, the battery includes four cells 1. Among the four cells 1, two cells 1 are arranged on one side of the circuit board assembly 15, and the other two cells 1 are arranged on the other opposite 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 the case 11 is parallel to the circuit board 155.

[0102] Continuing to refer to FIGS. 14, 15, and 17, the circuit board 155 is installed parallel to the cover plate 1122. In this embodiment, the circuit board 155 and the cell 1 are installed in parallel on two opposing planes in the thickness direction. In the mounted state, the second connection ear 1173 is parallel to the circuit board 155 and is welded to the second nickel block 152 distributed on the circuit board 155. One end of the second conductor 1182 away from the first conductor 1181 is also parallel to the circuit board 155 and is welded to the first nickel block 151 distributed on the circuit board 155. Similarly, several other cells 1 are also connected to the circuit board assembly 15 in this way to form a flat battery core unit 101 applied to devices such as electronic devices, and are used to realize the energy storage and charge / discharge management functions of the battery.

[0103] In another embodiment, as shown in FIG. 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 attachment protection for the battery core unit 101 composed of the circuit board assembly 15 and the cell 1.

[0104] In another embodiment, as shown in FIGS. 19 and 20, the insulating fastening unit 200 includes an insulating film 220. The insulating film 220 includes an insulating film base layer 221, and the insulating film base layer 221 is adhered to the cell 1 and / or the circuit board assembly 15 via an insulating film adhesive layer 222. Here, the insulating film 220 is mainly used for insulation, printing of marks, etc. The insulating film base 221 may include any 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 FIG. 21, the insulating film 220 includes an insulating film heat conduction layer 223 covering an insulating film base material layer 221. The insulating film 220 includes a plurality of insulating film adhesive layers 222. One of the plurality of insulating film adhesive layers 222 is distributed between the insulating film heat conduction layer 223 and the insulating film base material layer 221 to fix the insulating film heat conduction layer 223 to the insulating film base material layer 221. The insulating film heat conduction layer 223 is used for heat equalization and heat dissipation. That is, in addition to playing a role in heat dissipation, when the battery generates heat locally, the insulating film heat conduction layer 223 conducts the heat of the part to other parts of the battery to prevent local overheating and plays a role in protecting the battery. Here, the insulating film heat conduction layer 223 may include any one or more of graphite, copper foil, and aluminum foil.

[0106] In another embodiment, the thickness of the insulating film heat conduction 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 installed between the insulating film 220 and the cell 1 and / or between the insulating film 220 and the circuit board assembly 15. The plastic bracket 210 is used to form the outer contour of the battery. The specific position and thickness of the plastic bracket 210 are determined according to the needs of the outer shape. That is, the plastic bracket 210 may completely cover the case 11 or partially cover the case 11, and may adopt the same thickness or different thicknesses.

[0108] Hereinafter, an electronic device according to an embodiment of the second aspect of the present disclosure will be described.

[0109] Specifically, the electronic device according to the embodiment of the present disclosure may be an electronic device such as a tablet computer or a mobile phone. Of course, it may also be other electronic devices that require a battery function. The electronic device may include a device body and the battery 100 in the above embodiment. A battery accommodation chamber may be provided in the device body, the battery 100 may be installed in the battery accommodation chamber, and the battery 100 is electrically connected to the device body to supply power to the device body.

[0110] According to the electronic device according to the embodiment of the present disclosure, by installing the battery 100 in the above embodiment, it is possible to save the volume of the battery accommodation chamber, improve the space utilization rate, and contribute to the miniaturization of the electronic device.

[0111] In the present disclosure, unless otherwise specified, terms such as "attachment", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one. It may be a mechanical connection, an electrical connection, or a communication connection. It may be a direct connection or an indirect connection via an intermediate medium, or the internal communication between two elements or the interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present disclosure according to the specific situation.

[0112] In the description of this specification, the description referring 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 the said embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic description of the above terms is not necessarily limited to the same embodiment or example. Also, the specific configuration, structure, material, or feature described may be combined in a suitable manner in any one or more embodiments or examples. Also, unless they are mutually contradictory, those skilled in the art can combine or combine the different embodiments or examples described in this specification, as well as the configurations according to the different embodiments or examples.

[0113] Finally, each of the above embodiments is merely for explaining the technical solution of the present disclosure and does not limit it. Despite having described the present disclosure in detail with reference to each of the above embodiments, those skilled in the art can still modify the technical solutions described in each of the above embodiments or equivalently replace some or all of the technical configurations therein. These modifications or replacements do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of each embodiment of the present disclosure.

Claims

1. A battery comprising a cell, a protection board module, and an insulating spacer, wherein 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 an electrode end of the case, and 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, characterized in that it is a battery.

2. The recess and the electrode are displaced in the horizontal direction. The protection board module includes a module body and an electrode connection board. The module body is located within the recess, and one end of the electrode connection board is connected to the module body and the other end extends above the electrode and is electrically connected to the electrode. The battery according to claim 1, characterized in that.

3. The module body includes a substrate and electronic components. The electronic components are installed on a side of the substrate facing the cell and are located within the recess. The battery according to claim 2, characterized in that.

4. The electrode includes a first electrode and a second electrode, the recess is located between the first electrode and the second electrode, 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 at least a part of an edge on one side of the end face in the thickness direction of the cell is recessed to form the recess, or two recesses are provided, and the two recesses are respectively located at both ends of the end face in the width direction of the cell, and both the first electrode and the second electrode are located between the two recesses. The battery according to claim 2, characterized in that.

5. The electrode includes a first electrode and a second electrode, a plurality of recesses are provided, and at least one of the first electrode and the second electrode is installed within the recess. The battery according to claim 1, characterized in that.

6. At least a part of the structure of the protection board module is located within the recess where the electrode is not installed. The battery according to claim 5, characterized in that.

7. At least a part of the structure of the insulating spacer is located within the recess. The battery according to any one of claims 1 to 6, characterized in that.

8. The protection plate module further includes electrical connection terminals for connection to an external circuit. The battery according to any one of claims 1 to 6, characterized in that.

9. The battery further includes an injection molded member, the injection molded member is installed at an electrode end of the case, the injection molded member seals the protection plate module, and the electrical connection terminals extend to the outside of the injection molded member. The battery according to claim 8, characterized in that.

10. The injection molded member is suitable for filling a gap between the protection plate module and the recess. The battery according to claim 9, characterized in that.

11. The width of the injection molded member is equal to or less than the width of the case. The battery according to claim 9, characterized in that.

12. The battery further includes an electrode connection sheet connected to the tab and the electrode respectively. The battery according to any one of claims 1 to 6, characterized in that.

13. The case is a metal member, and / or the insulating spacer is a polyester resin member. The battery according to any one of claims 1 to 6, characterized in that.

14. The protection plate module includes a protection member having a detection end, and the protection member is attached to an end face of one end of the case such that the detection end faces the bare cell. The battery according to claim 1, characterized in that.

15. The tab includes a first pole tab and a second pole tab. The battery according to claim 14, characterized in that.

16. 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 claim 15, characterized in that.

17. The protection member includes a first connection terminal and a second connection terminal, the first connection terminal is connected to the first pole tab, and the second connection terminal is connected to a circuit board assembly. The battery according to claim 15, characterized in that.

18. The cell includes a first connection portion installed outside the case, the first pole tab is electrically connected to the first connection portion, and the first pole tab is electrically connected to the first connection terminal via the first connection portion. The battery according to claim 17, characterized in that.

19. 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, and 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. The battery according to claim 18, characterized in that.

20. 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 ear connected to the second connection terminal and a plate-shaped main body, and one end of the plate-shaped main body away from the second connection terminal is connected to the circuit board assembly. The battery according to claim 18, characterized in that.

21. A second connection ear is provided at one end of the plate-shaped main body away from the second connection terminal, and the plate-shaped main body is connected to the circuit board assembly through the second connection ear. The battery according to claim 20, characterized in that.

22. The battery further includes a circuit board assembly, the cell includes at least two cells, and the at least two cells are symmetrically distributed along the circuit board assembly. The battery according to any one of claims 14 to 21, characterized in that.

23. 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 claim 22, characterized in that.

24. The battery includes an insulating fastening unit covering the cell and the circuit board assembly. The battery according to claim 22, characterized in that.

25. The insulating fastening unit includes an insulating film, the insulating film includes an insulating film base material layer, and the insulating film base material layer is adhered to the cell and / or the circuit board assembly through the insulating film adhesive layer. The battery according to claim 24, characterized in that.

26. 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, and 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. The battery according to claim 25, characterized in that.

27. The insulating fastening unit further includes an adhesive fixing bracket installed between the insulating film and the circuit board assembly and / or between the insulating film and the cell. The battery according to any one of claims 24 to 26, characterized in that.

28. An electronic device, A device body having a battery accommodation chamber, The battery according to any one of claims 1 to 27, installed in the battery accommodation chamber and electrically connected to the device body, An electronic device, characterized in that.

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