Battery and electronic device

Abstract

The application discloses a battery and an electronic device, which uses a stable PCM assembly process, can effectively improve the battery production capacity and the reliability of the battery. The battery comprises a battery core and a protection plate assembly, the battery core comprises an electrode assembly and at least two pole columns, the pole columns are electrically connected with the electrode assembly; the protection plate assembly comprises an encapsulation body, a circuit board body and a connecting terminal, the circuit board body is arranged in the encapsulation body, the connecting terminal is electrically connected with the circuit board body, a slot hole is arranged on the encapsulation body, and the connecting terminal is exposed to the slot hole; the encapsulation body is at least partially located between the two pole columns, the pole columns apply a force to the encapsulation body to fix the encapsulation body; the pole columns are in contact with the connecting terminal to realize the electrical connection between the battery core and the protection plate assembly.

Description

Technical Field

[0001] This application relates to the field of battery packaging, specifically to batteries and electronic devices. Background Technology

[0002] Due to material limitations, lithium batteries and similar products cannot operate under conditions of overcharging, over-discharging, overcurrent, short circuit, or ultra-high temperature charging and discharging. Therefore, a PCM (Protection Circuit Module) is usually required to protect these batteries.

[0003] Using a PCM protection board ensures that the voltage difference between individual cells is less than a preset value, enabling equal charging of all individual cells and extending battery life. Therefore, the use of PCM protection boards is a current trend, and the assembly process of PCM protection boards is gradually coming into focus. People are very concerned about the assembly effect that the PCM assembly process can achieve, and providing a stable PCM assembly process can effectively improve production capacity. Summary of the Invention

[0004] In view of this, this application provides a battery and electronic device that uses a stable PCM assembly process, which can effectively improve battery production capacity and battery reliability.

[0005] This application provides a battery including a cell and a protection board assembly. The cell includes an electrode assembly and at least two terminals electrically connected to the electrode assembly. The protection board assembly includes a package, a circuit board body, and connecting terminals. The circuit board body is disposed within the package, and the connecting terminals are electrically connected to the circuit board body. The package has slots, and the connecting terminals are exposed in the slots. The package is at least partially located between two of the terminals, and the terminals exert a force on the package to fix the package. The terminals contact the connecting terminals to achieve electrical connection between the cell and the protection board assembly.

[0006] The electrode post includes a first electrode post and a second electrode post. The first electrode post is electrically connected to the positive terminal of the electrode assembly, and the second electrode post is electrically connected to the negative terminal of the electrode assembly. The connection terminal includes a first connection terminal and a second connection terminal. The first connection terminal and the second connection terminal are electrically connected to the circuit board body. The slot includes a first slot and a second slot. The first connection terminal is exposed in the first slot, and the second connection terminal is exposed in the second slot. The package is at least partially located between the first electrode post and the second electrode post. The first electrode post and the second electrode post exert a force on the package to fix the package. The first electrode post is in contact with the first connection terminal, and the second electrode post is in contact with the second connection terminal to realize the electrical connection between the battery cell and the protection board assembly.

[0007] Optionally, the first slot is located at the first end of the package along the length direction, the second slot is located at the second end of the package along the length direction, and the package is located between the first pole and the second pole.

[0008] Optionally, both the first and second connecting terminals include a protrusion structure protruding from the package; the first electrode is located in the first slot, the first electrode is in electrical contact with the first connecting terminal, and the first electrode is provided with a recessed structure that mates with the protrusion structure; the second electrode is located in the second slot, the second electrode is in electrical contact with the second connecting terminal, and the second electrode is provided with the recessed structure that mates with the protrusion structure.

[0009] Optionally, the first connecting terminal is located in the first slot, the first pole is located in the first slot and is in electrical contact with the first connecting terminal, and the first pole is provided with a protrusion that mates with the first slot, the protrusion extending into the first slot and contacting the first connecting terminal; the second connecting terminal is located in the second slot, the second pole is located in the second slot and is in electrical contact with the second connecting terminal, and the second pole is provided with a protrusion that mates with the second slot, the protrusion extending into the second slot and contacting the second connecting terminal.

[0010] Optionally, the first slot and the second slot are located on the bottom surface of the package, and the first connection terminal and the second connection terminal are both located in the slot. The bottom surface is the side of the package facing the battery cell. The first terminal and the second terminal are arranged facing the bottom surface, and the arrangement position of the first terminal corresponds to the arrangement position of the first slot, and the arrangement position of the second terminal corresponds to the arrangement position of the second slot.

[0011] Optionally, the connection terminal is a conductive metal layer coated on the sidewalls of the first and second slots.

[0012] Optionally, the first slot and the second slot are located on the top surface of the package, the top surface being the side of the package facing away from the battery cell. The package is located between the first terminal and the second terminal, and the tail end of the terminal is bent toward the package to apply pressure to the connection terminal, thereby fixing the package. The tail end of the terminal contacts the connection terminal exposed in the slot provided on the top surface.

[0013] Optionally, the battery cell further includes a housing, the electrode assembly is disposed within the housing, and the first terminal and the second terminal are disposed on the housing.

[0014] Optionally, the connection terminal includes at least one of nickel terminal, copper terminal, and aluminum terminal.

[0015] Optionally, the encapsulation body includes a resin encapsulation body.

[0016] This application also relates to an electronic device including the battery.

[0017] The battery and electronic device of the present invention have a cell and a protection board assembly. The protection board assembly can provide electrical protection for the cell. Moreover, the encapsulation of the protection board assembly is at least partially located between the two terminals of the cell. The two terminals and the encapsulation are used to apply force to the encapsulation to fix the encapsulation. Therefore, the impact of poor welding problems, such as false soldering, incomplete soldering, and burn-through, on the reliability of the battery is reduced, the processing difficulty for manufacturers is reduced, the reliability of the battery is effectively increased, and the production capacity is improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the battery structure in one embodiment of this application.

[0020] Figure 2 This is an exploded view of a battery in one embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the protection plate assembly described in one embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the protection plate assembly described in one embodiment of this application.

[0023] Figure 5 for Figure 4 The diagram shows the protection board assembly and the battery cell described in the document.

[0024] Figure 6 for Figure 4 A side view of a schematic diagram of the protection plate assembly shown in the embodiment.

[0025] Figure 7 This is a schematic diagram of the protection plate assembly described in one embodiment.

[0026] Figure 8 This is a schematic diagram of the protection plate assembly described in one embodiment.

[0027] Figure 9 for Figure 8 The diagram shows the protection board assembly and the battery cell described in the document.

[0028] Figure 10 This is a schematic diagram of the protection board assembly and the battery cell in one embodiment. Detailed Implementation

[0029] The following description, in conjunction with the accompanying drawings and embodiments, further illustrates a battery and electronic device designed in this application.

[0030] Please see Figure 1 , Figure 2 , Figure 3 ,in Figure 1 This is a schematic diagram of the battery structure in one embodiment of this application. Figure 2 This is an exploded view of a battery according to one embodiment of this application. Figure 3 This is a schematic diagram of the protection plate assembly described in one embodiment of this application.

[0031] In this embodiment, the battery includes a cell 101 and a protection board assembly 100.

[0032] The battery cell 101 is used to assemble a battery, and can be used in cascades or individually, serving as the energy storage component of the battery. The battery cell 101 includes an electrode assembly, a first terminal, and a second terminal. The electrode assembly includes a positive electrode and a negative electrode. The first terminal and the second terminal are electrically connected to the positive and negative terminals, respectively, thereby conducting the charge from the battery cell 101 externally.

[0033] The battery cell 101 also includes a housing, with the electrode assembly disposed within the housing, and the first and second terminals disposed on the housing. The housing can be a metal housing or a plastic housing. A metal housing has sufficient strength to protect the electrode assembly and prevent deformation of the internal electrode assembly. However, because the metal housing has a certain degree of conductivity, at least one of the first and second terminals needs to be insulated from the metal housing to avoid a short circuit between the first and second terminals, which could cause a safety hazard. In some embodiments, an insulating layer may also be provided between the electrode assembly and the housing to prevent the battery cell 101 from discharging through the housing, thus preventing a safety hazard.

[0034] In this embodiment, the surface of the housing is provided with an explosion-proof zone. By reducing the thickness of the housing in a local area, this part is made thinner than other parts of the housing, so that when the pressure inside the housing exceeds a preset pressure value, the local area is broken through, thereby achieving the pressure relief and explosion-proof function.

[0035] The protection board assembly 100 includes a circuit board body 102 for electrical connection to the battery cell 101. It can realize electrical protection of the battery cell 101, such as charge and discharge protection, and help the cascaded battery cells 101 to achieve equal charging. It can also detect the overvoltage, undervoltage, overcurrent, short circuit and overtemperature status of the battery cell 101, thereby achieving the purpose of protection and extending battery life.

[0036] The protection board assembly 100 further includes a connection terminal 201, which has good conductivity and is electrically connected to the circuit board body 102. This connection terminal 201 serves to bring out the connection point of the circuit board body 102, facilitating the connection between the circuit board body 102 and the battery cell 101. In this embodiment, the connection terminal 201 includes a first connection terminal and a second connection terminal. The first connection terminal is connected to a first terminal, and the second connection terminal is connected to a second terminal.

[0037] The connecting terminal 201 includes at least one of nickel, copper, and aluminum terminals. In other embodiments, the specific material composition of the connecting terminal 201 may be configured as needed to achieve better conductivity.

[0038] The protection board assembly 100 further includes an encapsulation body 103, within which the circuit board body 102 is disposed. The encapsulation body 103 includes a resin encapsulation body, such as an epoxy resin encapsulation body, which encapsulates the circuit board body 102 and provides physical protection for the circuit board body 102, preventing damage to the circuit board body 102.

[0039] The package 103 has slots to expose the connection terminals 201 connected to the circuit board body 102. The slots include a first slot and a second slot, and their positions correspond to the positions of the first and second connection terminals.

[0040] In this embodiment, since the battery cell 101 has more than two terminals, the protection board assembly can be clamped and limited by at least two terminals, thereby improving the reliability of the electrical connection between the battery cell and the protection board assembly and thus improving the stability of the battery.

[0041] Specifically, the package 103 is configured to be at least partially located between the first pole and the second pole, and the first pole and the second pole apply force to the package 103 to fix the package 103.

[0042] When the protection board assembly 100 is assembled onto the battery cell 101, the first terminal post contacts the first connection terminal, and the second terminal post contacts the second connection terminal, so as to realize the electrical connection between the battery cell 101 and the protection board assembly 100.

[0043] In this embodiment, the protection board assembly 100 further includes an external connector 105 for connecting the circuit board body 102 to electronic devices, such as mobile phones, laptops, etc.

[0044] In this embodiment, since the protection board assembly is partially disposed between the first and second terminals, the first and second terminals can apply force to the package 103 to facilitate fixing the package 103. Therefore, the circuit board body 102 of the protection board assembly 100 can be connected to the cell 101 without the need for additional connection techniques such as welding or bonding, thereby effectively increasing the reliability of the battery. Even if the welding or bonding between the connection terminal 201 of the protection board assembly 100 and the terminal 104 of the cell 101 is not secure, the terminal 104 can still apply force to the package 103, thereby ensuring that the protection board assembly 100 is installed on the cell 101. The battery in this embodiment reduces the manufacturing difficulty for manufacturers, effectively increases the reliability of the battery, and improves production capacity.

[0045] Furthermore, without relying on additional connection technologies such as welding or bonding, and only using the force exerted by the first and second poles on the protection board assembly to fix the battery cell and the protection board assembly, the battery cell and the protection board assembly are detachably connected. When the battery cell or the protection board assembly is damaged, only the damaged part needs to be replaced, which facilitates repair and maintenance and reduces maintenance costs.

[0046] Please see Figure 4 , Figure 5 ,in Figure 4 This is a schematic diagram of the protection plate assembly 100 in one embodiment. Figure 5 for Figure 4 The diagram shows the protection board assembly and the battery cell described in the document.

[0047] Figure 4 , Figure 5 The illustrated embodiment demonstrates the positional relationship between the slot 301 and the connecting terminal 201.

[0048] In this embodiment, the first slot on the package 103 is located at the first end of the package 103 along the length direction, and the second slot is located at the second end of the package 103 along the length direction. Correspondingly, the first connecting terminal is located at the first end of the package 103 along the length direction, and the second connecting terminal is located at the second end of the package 103 along the length direction, and is exposed outside the slot 301.

[0049] The package 103 is located between the first electrode and the second electrode. The first electrode applies pressure to the first end, and the second electrode applies pressure to the second end to fix the package 103. At this time, the electrode 104 can directly contact the connection terminal 201 of the slot 301 exposed at the first and second ends of the package 103 to complete the electrical connection between the two.

[0050] In this embodiment, the slot 301 has a certain depth, the connecting terminal 201 is located at the bottom of the slot 301, and the pole post 104 has a protrusion 701 that mates with the slot 301 on the side facing the slot 301. The protrusion 701 extends into the slot 301 and contacts the connecting terminal 201 at the bottom of the slot 301. The height of the protrusion 701 matches the depth of the slot 301 and is at least greater than or equal to the depth of the slot 301, so as to increase the possibility of electrical contact between the protrusion 701 and the connecting terminal 201 at the bottom of the slot 301.

[0051] The cooperation between the protrusion structure 401 and the slot 301 can strengthen the connection between the protection plate assembly 100 and the battery cell 101, thereby improving the reliability of the battery.

[0052] In some other embodiments, the slot may be made shallow enough to fully expose the connection terminal 201 at the bottom of the slot so that the pole post 104 can make contact with the connection terminal 201.

[0053] Please see Figure 6 ,for Figure 4 A side view of a schematic diagram of the protection plate assembly shown in the embodiment.

[0054] In this embodiment, the connection terminal 201 includes a protrusion structure 401 protruding from the package 103, and the pole post 104 is provided with a recessed structure that cooperates with the protrusion structure 401, which is not shown.

[0055] use Figure 6The protection board assembly 100 described in the illustrated embodiment can strengthen the connection between the protection board assembly 100 and the battery cell 101 by means of the cooperation between the protruding structure 401 of the connection terminal 201 and the recessed structure provided on the electrode post 104, thereby further improving the reliability of the battery.

[0056] Please see Figure 7 The diagram below is a schematic diagram of the protection plate assembly in one embodiment, showing the positional relationship between the slot 301 and the connection terminal 201 in the protection plate assembly 100.

[0057] In this embodiment, the first slot and the second slot are located on the bottom surface of the package 103, which is the side of the package 103 facing the battery cell 101, and the connection terminal 201 is located in the slot 301.

[0058] In this embodiment, the electrode post 104 is disposed on the side of the battery cell 101 facing the package 103, and the position of the first slot corresponds to the position of the first electrode post, and the position of the second slot corresponds to the position of the second electrode post.

[0059] The first slot and the second slot have a certain depth. The connecting terminal 201 is exposed at the bottom of the slot 301. The dimension of the pole post 104 in the direction of the depth of the slot 301 is greater than or equal to the depth of the slot 301. After being inserted into the slot 301, it can contact the connecting terminal 201 exposed at the bottom of the slot 301.

[0060] In this embodiment, by inserting the slot 301 into the terminal post 104, the terminal post 104 applies force to the protection board assembly 100, thereby strengthening the connection between the cell 101 and the protection board assembly 100 and improving the reliability of the battery.

[0061] In a preferred embodiment, the connection terminal is a conductive metal layer coated on the sidewalls of the first and second slots. As long as the electrode post 104 contacts the conductive metal layer coated on the sidewall of the slot 301, it is equivalent to being electrically connected to the connection terminal 201, which further increases the possibility of electrical connection between the cell 101 and the connection terminal 201 and improves the reliability of the battery.

[0062] The conductive metal layer includes at least one of conductive metals such as nickel, copper, and aluminum, which can be selected according to actual needs.

[0063] Please see Figure 8 , Figure 9 ,in Figure 8 This is a schematic diagram of the protection plate assembly described in one embodiment. Figure 9 for Figure 8 The diagram shows the protection board assembly and the battery cell described in the document. Figure 8 , Figure 9 The embodiment shown illustrates the positional relationship between the slot 301 and the connection terminal 201 in the protection assembly.

[0064] In this embodiment, the first slot and the second slot are located on the top surface of the package 103, which is the side of the package 103 facing away from the battery cell 101. The package 103 is located between the first terminal and the second terminal, and the tail end 601 of the terminal 104 is bent toward the package to apply pressure to the connection terminal 201, thereby fixing the package 103. The tail end 601 of the terminal 104 contacts the connection terminal 201 exposed in the slot 301 provided on the top surface.

[0065] In this embodiment, the slot 301 is shallow, thereby exposing the connection terminal 201 on the surface of the package 103 so that the bent end 601 of the pole post 104 contacts the connection terminal 201.

[0066] In practice, the position of the connection terminals can be set as needed, as long as it can fix the relative position of the protection board assembly and the battery cell after the protection board assembly is pressured by the first and second poles. For example Figure 10 This is a schematic diagram of the protection board assembly and the battery cell in one embodiment. In this embodiment, the first slot and the first terminal are arranged as follows: Figure 4 , Figure 5 In the embodiment described, the first slot is disposed at the first end of the package, and the first electrode post is electrically contacted with the exposed first connection terminal inside and outside the first slot via a protrusion 701. The arrangement of the second slot and the second electrode post is as follows: Figure 8 , Figure 9 In the embodiment shown, the tail end 601 of the second pole is bent and makes electrical contact with the second connection terminal exposed in the second slot on the top surface of the package.

[0067] This application also relates to an electronic device including the battery.

[0068] As described in the above embodiments, the battery has a protection board assembly 100 and a battery cell 101 as described above. Therefore, since the package 103 of the protection board assembly 100 is at least partially located between the first terminal and the second terminal of the battery cell 101, and the first terminal and the second terminal apply force to the package 103 to fix the package 103, the connection between the circuit board body 102 of the protection board assembly 100 and the battery cell 101 can be achieved without the aid of additional connection technologies such as welding and bonding. This can effectively increase the reliability of the battery, thereby increasing the reliability of the electronic device and reducing the processing difficulty for the manufacturer.

[0069] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, such as the combination of technical features between embodiments, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A battery comprising a cell and a protection board assembly, characterized in that, The battery cell includes an electrode assembly and a first terminal and a second terminal, wherein the first terminal and the second terminal are electrically connected to the electrode assembly; The protection board assembly includes a package body, a circuit board body, a first connecting terminal, and a second connecting terminal. The circuit board body is disposed within the package body. The first connecting terminal and the second connecting terminal are electrically connected to the circuit board body. The package body is provided with a first slot and a second slot. The first slot and the first connecting terminal are both located at a first end of the package body along the length direction. The second slot and the second connecting terminal are both located at a second end of the package body along the length direction. The first connecting terminal is exposed in the first slot, and the second connecting terminal is exposed in the second slot. The package is located between the first electrode and the second electrode. The first electrode facing the first slot and the second electrode facing the second slot are both provided with protrusions. The protrusions extend into the corresponding slots and contact the corresponding connection terminals to realize the electrical connection between the battery cell and the protection board assembly. The first electrode applies pressure to the first end of the package, and the second electrode applies pressure to the second end of the package to clamp the package and the circuit board body along the length direction of the package and the circuit board body, and apply force to the package and the circuit board body to fix the package and the circuit board body.

2. The battery according to claim 1, characterized in that, The first terminal is electrically connected to the positive terminal of the electrode assembly, and the second terminal is electrically connected to the negative terminal of the electrode assembly.

3. The battery according to claim 2, characterized in that, The first slot and the second slot are located on the bottom surface of the package. The first connection terminal and the second connection terminal are both located in the slot. The bottom surface is the side of the package facing the battery cell. The first terminal and the second terminal are arranged facing the bottom surface, and the arrangement position of the first terminal corresponds to the arrangement position of the first slot, and the arrangement position of the second terminal corresponds to the arrangement position of the second slot.

4. The battery according to claim 3, characterized in that, The connection terminal is a conductive metal layer coated on the sidewalls of the first and second slots.

5. The battery according to claim 2, characterized in that, The battery cell also includes a housing, the electrode assembly is disposed inside the housing, and the first electrode post and the second electrode post are disposed on the housing.

6. The battery according to claim 1, characterized in that, The connection terminal includes at least one of nickel terminal, copper terminal, and aluminum terminal.

7. The battery according to claim 1, characterized in that, The encapsulation body includes a resin encapsulation body.

8. An electronic device, characterized in that, Includes the battery as described in any one of claims 1 to 7.

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